Note: Descriptions are shown in the official language in which they were submitted.
FLAME SIMULATING ASSEMBLY FOR SIMULATED FIREPLACES
INCLUDING A REFLECTING LIGHT SYSTEM
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation-in-part of US Patent
Application
No. 16004767 filed June 11, 2018, and is also related to, and claims the
benefit of U.S. Provisional Application No. 62522165 filed June 20, 2017,
U.S. Provisional Application No. 62522170 filed June 20, 2017, U.S.
Provisional Application No. 62522174 filed June 20, 2017, and U.S.
Provisional Application No. 62535938 filed July 23, 2017, the entire
contents of which are all incorporated herein by reference.
BACKGROUND
[0002] 1. Technical Field
[0003] The present disclosure relates generally to artificial or
simulated
fireplaces and stoves, and more particularly to an electronic flame
simulating assembly with an enhanced flickering light and modular design.
[0004] 2. Background of the Related Art
[0005] In simulated fireplaces, electronic flames or simulated flames
are
often used to provide the simulated fireplace with a more realistic visual
flame or fire effect and also to play a role in decoration. Prior art flame
simulation devices may include a light source and rotating reflector which
are installed behind or beneath a screen wall with flame-shaped slots, also
called a flame screen. Many prior art devices also include two-way mirrored
back walls which temper the passage of backlighting to soften the edges of
simulated flames created behind the back wall. However, these false back
walls add substantial depth to the devices. These configurations take up
more space, are more costly, and are more fragile in transit.
[0006] Many devices additionally include a simulated fuel bed that
includes
simulated logs and embers of the fire. The simulated fuel bed and logs must
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be independently lit by a separate light source(s) adding further cost and
complexity to the devices.
[0007] Therefore, there is a perceived need in the industry for a
simulated
fireplace that includes a fuel bed and flame screen that have an enhanced
simulated burning visual effect, that does not require additional back
lighting components which can significantly increase the cost of
manufacture and cost or operation of the simulated fireplace. Furthermore,
there is also a desire to reduce cost of operation of simulated fireplaces,
namely, reduced electrical needs of the simulated fireplace.
SUMMARY
[0008] The present disclosure provides in one respect, a flame
simulating
assembly with a reflected flickering light system that includes a light source
that shines through a rotating flicker rod with a plurality of flicker
elements. Some of the light from the light source is reflected off of the
rotating flicker element up towards a flame screen to create a flame effect.
Some of the light from the light source passes though the rotating flicker
elements onto an angled reflector, or mirror, that reflects light up onto a
simulated fuel bed. The light that is reflected off the mirror first passes
through gaps in the flicker elements as the flicker rod rotates and the
terminal ends of the flicker elements dip into and out of the light path. The
dipping flicker elements creates a fluttering light effect due to the flicker
elements "intermittently dipping" into the light path. This fluctuating light
is reflected onto the logs and ember bed in front and creates a dancing
effect, which simulates glowing embers and burning logs. The logs and
ember bed may or may not be additionally lit from the inside. A significant
portion of the emitted light is also reflected from the flicker elements and
up
through a screen wall with flame-shaped slots and openings, and onto an
imaging screen or wall, to further simulate flames.
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[0009] Another novel aspect of the present disclosure solves the
problems of
the prior art by providing a flame simulating assembly with a flame screen
that has non-continuous flame-shaped segments that have sharper edges,
are generally wider than they are tall, and taper outwardly from the center
to the edges of the flame screen. The non-continuous flame-shaped segment
can, for example, be non-continuous in a vertical direction, or along the
beam angle of the light source. This unique flame shape configuration
results in a more pronounced triangular shape of the resulting simulated
flame. The triangular outline shape of the non-continuous cutouts can
create an artificial fire shape that better resembles a real fire, and that is
wider at the bottom than at the top, with greater intensity at the center
than at the edges. In alternative embodiments, the non-continuous cutouts
can have an outline of any other shape including an elongated triangular,
rectangular, oval, parabolic, sinusoidal, etc. shape.
[0010] Further embodiments can include an improved simulated light
assembly which can channel, or direct, light at a desired forward angle and
prevent side spill of light to provide for enhanced flame shapes for a more
realistic flame. While the terms, channel and direct, are used, this is not
intended to limit the function of the device. A portion of the light may be
channeled while other portions of the light may diffuse through the channel
walls.
[0011] A further novel aspect of the present disclosure provides a
flame
simulating assembly with an integrated ember bed and flame screen
assembly. The integrated ember bed and flame screen may be molded as a
single piece of plastic, providing many advantages. The ember bed can be lit
from inside by the flicker element, creating a glowing ember bed, in addition
to projecting the simulated flame through an integrated flame screen. The
cost is reduced since the flame screen may be made from the same plastic
instead of steel, injection molded instead of stamped in a secondary forming
operation, and the depth can be decreased due to the elimination of a
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barrier between flicker element and ember bed. The cutout shapes of the
flame screen may also be advantageously punched out, either before or after
injection molding. Separate logs or grate elements can be attached or built
into the molding process. The molding process can be any molding process
including injection molding, vacuum molding, or blow molding. Moreover,
in some embodiments, the integrated assembly can be fused together after
discrete portions are molded.
[0012] Some embodiments may also include rear reflectors, floor
reflectors
and/or multiple vertically stacked rows of LEDS above and/or below the
central axis of the flicker rod.
[0013] Accordingly, it can be seen that the present disclosure provides
a
unique and novel flame simulating assembly with improved flame
appearance, better design, fewer parts and less cost.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] These and other features, aspects, and advantages of the present
invention will become better understood with reference to the following
description, appended claims, and accompanying drawings where:
[0015] Fig. 1 is a perspective view of a first exemplary embodiment of
an
electric fireplace;
[0016] Fig. 2 is a partial perspective cross-sectional view of the
fireplace of
Fig. 1;
[0017] Fig. 2A is a partial perspective cross section view of the
fireplace of
Fig. 1;
[0018] Figs. 2B-2H are perspective views of alternative ember bed
reflectors;
[0019] Fig. 3 is a rear perspective view of a flame screen assembly of
the
fireplace of Fig. 1;
[0020] Fig. 4 is another rear perspective view of the flame screen of
Fig. 3
with a light shield in accordance with the teachings of the present
invention;
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[0021] Fig. 5 is a rear view of the flame simulation sub-assembly of
Fig. 4;
[0022] Fig. 6 is a bottom perspective view of a first embodiment of a
light
shield;
[0023] Fig. 7 is a front view of the light shield of Fig. 6;
[0024] Fig. 8 is a bottom view of a light assembly, light shield, and
flicker
assembly;
[0025] Fig. 9 is a front view of the subassembly of Fig. 8;
[0026] Fig. 10 is a perspective view of the subassembly of Fig. 8;
[0027] Fig. 11 is a top view of the subassembly of Fig. 8 with a front
reflector;
[0028] Fig. 12 is a top view of an embodiment of a flicker element in a
flat
configuration before assembly onto the electric fireplace;
[0029] Fig. 13 is a schematic of a prior art flame screen;
[0030] Fig. 14 is a schematic of an embodiment of a flame cut-out in
accordance with the present invention;
[0031] Fig. 15 is a schematic of an alternative embodiment of a flame
cut-
out;
[0032] Fig. 16 is a top perspective view of a flame screen;
[0033] Fig. 17 is a partial perspective view of a second exemplary
embodiment of an electric fireplace with an integrated ember bed and flame
screen;
[0034] Fig. 18 is a partial perspective cross-sectional view of the
fireplace of
Fig 17;
[0035] Fig. 19 is a partial perspective cross-sectional view of the
fireplace of
Fig. 17;
[0036] Fig. 20 is a rear perspective view of a combined flame-screen
and fuel
bed of the fireplace of Fig. 17;
[0037] Fig. 21 is a front perspective view of the combined flame-screen
and
fuel bed of Fig. 20;
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[0038] Fig. 22 is a front perspective view of the combined flame-screen
and
fuel bed of Fig. 20 with a simulated log;
[0039] Fig. 23 is a perspective view of a third exemplary embodiment of
an
electric fireplace;
[0040] Fig. 24 is a cross sectional view of Fig. 23;
[0041] Fig. 25 is a front perspective view of the light sub-assembly of
Fig. 23;
[0042] Fig. 26 is a cross-sectional view of Fig. 23;
[0043] Fig. 27 is a schematic view of another alternative embodiment of
a
simulated fireplace assembly;
[0044] Fig. 28 is a schematic view of still another alternative
embodiment of
a simulated fireplace assembly; and
[0045] Fig. 29 is a schematic view of yet another alternative
embodiment of
a simulated fireplace assembly.
DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS
[0046] Certain exemplary embodiments will now be described to provide
an
overall understanding of the principles of the structure, function,
manufacture, and use of the device and methods disclosed herein. One or
more examples of these embodiments are illustrated in the accompanying
drawings. Those skilled in the art will understand that the devices and
methods specifically described herein and illustrated in the accompanying
drawings are non-limiting exemplary embodiments and that the scope of the
present invention is defined solely by the claims. The features illustrated or
described in connection with one exemplary embodiment may be combined
with the features of other embodiments. Such modifications and variations
are intended to be included within the scope of the present disclosure.
Further, in the present disclosure, like-numbered components of the
embodiments generally have similar features, and thus within a particular
embodiment each feature of each like-numbered component is not
necessarily fully elaborated upon. Additionally, to the extent that linear or
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circular dimensions are used in the description of the disclosed systems,
devices, and methods, such dimensions are not intended to limit the types of
shapes that can be used in conjunction with such systems, devices, and
methods. A person skilled in the art will recognize that an equivalent to
such linear and circular dimensions can easily be determined for any
geometric shape. Further, to the extent that directional terms like top,
bottom, up, or down are used, they are not intended to limit the systems,
devices, and methods disclosed herein. A person skilled in the art will
recognize that these terms are merely relative to the system and device
being discussed and are not universal.
[0047] Generally, a novel, electronic simulated fireplace is disclosed.
As
noted above, traditional electric or electronic fireplaces suffer from a
number of drawbacks including complicated manufacturing, a large number
of parts, poor quality flame projections, and housing sizes that are too large
for many locations. The instant disclosure provides a number of advantages
over the prior art. The instant disclosure provides a number of sub-
assemblies that individually, or in combination, provide a more realistic
moving image of fluctuating flames, a more realistic glow for an ember bed,
a more compact design, or a more integrated design.
[0048] In an exemplary embodiment, illustrated in Figs. 1-15, the
electric
fireplace 100 can include a housing, or enclosure, 101 having front and back
walls 102a, 102b, top and bottom walls 104a, 104b, and side walls 106a,
106b. Through an opening 108 in the front wall 102a a firebox cavity 103
can be defined which is visible through a transparent glass panel or a set of
glass doors (not shown). The firebox cavity 103 can be defined by a firebox
rear wall 110, firebox top and bottom walls, and firebox side walls 112a,
112b. The firebox cavity 103 is intended to create the appearance of a
traditional fireplace firebox. The side walls 112a, 112b and the rear wall
110 may or may not be given the appearance of brick or stone to provide an
authentic look and feel. The side walls 112a, 112b may or may not be
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angled relative to the rear wall 110. In the illustrated embodiment, a
gradation of color from a central location 110a on the firebox rear wall to
the
firebox side walls may provide the illusion of soot build-up 110b towards the
outer edges while also providing a brighter, lighter central portion for
enhanced reflection and flame appearance in the center. For example, the
central portion 110a may be yellow, red, brown, or brick colored, and the
color can then fade to a black, grey, or generally soot-like color as it
extends
away from the central portion forming a gradation 110b. Alternatively, the
firebox side walls 112a, 112b and the firebox rear wall 110 can have any
appearance, texture, or color.
[0049] The interior of the housing can provide space for various
internal
components of the electric fireplace, including a heater/blower unit (not
shown in this embodiment) which provides a warm air flow from the
fireplace unit 100 and further including a flame simulation assembly 120
which provides the visual effect of moving flames on the firebox rear wall
110. Referring briefly to Figs. 17-18, an exemplary configuration of the
heater is located in a compartment at the top of the housing. However, in
alternative embodiments, the heater can be disposed in other areas of the
device. In general, the heater/blower unit can be controlled, with a
controller (not shown), to provide hot air to heat the surrounding area to
further add to the realism of the electric fireplace and its' utility as a
space
heater. The controller can additionally be used to control the flame
simulation assembly and any other feature of the device.
[0050] The flame simulation assembly 120 can generally include a flame
simulating light source 130, a flicker element 140, and a flame simulator
element (flame screen) 150 all of which work in concert to create the shape
and appearance of moving flames on the firebox rear wall 110. In the
illustrated embodiment, the rear wall 110 functions as an imaging screen,
and the flame simulating components are located in front of the rear wall
110. The rear wall panel 110 may alternatively have other shape
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configurations and/or have areas of matte or glossy finishes depending on
the desired flame effect and the configuration of the flame simulating
assembly 120 located forwardly thereof. In addition to the flame simulation
assembly 120, the fireplace 100 may include an ember bed simulation
assembly 160. In some embodiments the ember bed simulation assembly
160 is a fully, or partially, separate assembly from the flame simulation
assembly 120. In other embodiments, the ember bed simulation assembly
160 is integrated into, and with, the flame simulation assembly 120. As will
be discussed in detail below, the various embodiments can provide an
enhanced realistic flame and ember simulation. In some embodiments,
various sub-assemblies can be integrated together to decrease the overall
footprint of the fireplace assembly.
[0051] In the first embodiment, as shown in Figs. 1, 2, and 2A, the
electric
fireplace 100 is shown. As noted above, the electric fireplace 100 can
generally include a housing 101 having a heater at a top portion thereof and
a flame simulation assembly 120 and an ember bed simulation assembly
160 in a bottom portion thereof.
[0052] In general, the flame simulation assembly 120 can include a
single
flame simulating light source 130 which can be used to illuminate both a
flame simulation assembly 120 and an ember bed simulation 160 assembly
¨ without additional light sources. The flame simulation assembly 120 can
generally include the flame simulating light source 130, a light shield 131, a
rotating flicker element 140 which can angle the light generated by the light
source 130, and a flame screen 150. The flame simulation assembly 150 can
be a single subassembly housed by a flame simulation housing 122. The
flame simulation housing 122 can have two sidewalls 124a, 124b, a lower
rear wall 126, and an upper rear wall 128. In the illustrated embodiment,
the lower rear wall 126 can have a generally upside-down "L" shape that
includes an upper horizontal piece 126a and a lower vertical piece 126b.
Extending upward and forward, at an angle, from a forward edge of the
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upper horizontal piece 126a can be the flame screen support 128. The flame
screen support 128 can be disposed in an angle of approximately 50 degrees
to 70 degrees from the horizontal. In the illustrated embodiment the flame
screen support 128 has a flame screen 150 integrated directly thereon.
[0053] The single light array, or source, 130 can be disposed beneath
the
flame screen 150 proximate on the lower rear wall 126 of the flame
simulation housing 122. The light array 130 can include a plurality of bulbs
or light emitting diodes (LEDs) 134 disposed on a printed circuit board
(PCB) or mounted on a support 132 and wired together. In the exemplary
embodiment, the light array 103 is disposed against the lower rear wall
126b and oriented such that the PCB 132 is parallel to both the rear and
front walls 102a, 102b and the bottom and top walls 104a, 104b. In an
alternative embodiment (see Figs. 23-26), the light array 130 can be angled
upward relative to the rear wall 110 so that it is partially directed up
towards the top wall 104a of the fireplace housing 101. This arrangement
will be discussed hereinafter with regards to the embodiment of Figs. 23-26.
In some embodiments, the light array 130 can be an elongated panel that
includes a plurality of sources 134. The light sources 134 can be any of
traditional incandescent light bulbs, halogen bulbs, fluorescent bulbs, or
light emitting diodes (LEDs) disposed thereon. The light sources 134 can be
any color including white, or various hues of yellow, red, orange, blue, and
violet. The various colors and color combinations can be used to create a
realistic flame effect. In the illustrated embodiment, as shown in Fig. 5,
LEDs are shown in an array of groups 136 of LEDs. The groups of LEDs
136 can be three columns of LEDs 134, with three, two, and three LEDs
disposed in columns. The LEDs 134 in each column can be aligned with the
LEDs of the other columns such that they form rows. Alternatively, any
number of LEDs 134 can be grouped in the array 130. For example, as
shown in Fig. 8, two groups of LEDs on either side of the center LED group
can include three LEDs each, in a generally triangular shape. Any of the
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groupings of LEDs 136 can have any geometric configuration. The array of
LEDs, as shown, are arranged such that the distance between each of the
LED groups 136 changes, as shown in Fig. 5. The center LED group 136a
can be a first distance D1 from the second sets 136b on either side. The
third sets 136c can be a second distance D2 from the second sets 136b. The
fourth sets 136d can be a third distance D3 from the third sets 136c. The
first, second, and third distances D1, D2, D3, can be equal or different than
one another. Moreover, any number of groups 136 can be used. The
locations of LED groups 136a-d can be a function of the design of the flame
shield 150 used, as discussed below. However, in some alternative
embodiments, the distance between the LED groups 136 can be the same
along the length of the array 130. This single light array 130 is designed to
output enough light to create realistic flames on the rear wall 110 of the
housing, a glow effect on the rear wall of the housing, and illuminate the
ember bed 160 and logs 192 to simulate burning embers and logs.
[0054] As noted above, the flame simulation assembly 120 can
additionally
include a light channeling shield, light focusing system, or light path
guidance system, 131 to further optimize the realism of the flames
generated thereby. Referring now to Fig. 4, an exemplary embodiment of a
light channeling shield 131 is shown generally disposed in the flame
simulation assembly 120. In order to mitigate, or prevent, the crossing of
flames or diagonal flame shapes, a partition shield can be used to block the
light shining from the LED groups 136 at steep beam angles. In other
words, each individual LED group 136 can have a beam angle that defines
how much the light is distributed. The exemplary light shield 131 can
direct, or focus, the light from the LED groups 136 such that each LED
group 136 is only illuminating certain portions of the flame simulation
assembly 120 or the ember bed assembly 160. The exemplary light
channeling shield 131 accomplishes this goal by providing a channel 137 for
each group of LEDs 136 in the array 130 to direct the light emitted
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therefrom. The shield 130 can be made from an opaque or translucent
material to permit a select amount of diffuse light to pass therethrough.
Alternatively, the shield 131 can be made from a solid material that may
prevent light from crossing over into other channels 137. In a further
alternative, the top wall 133 can be made from a translucent material and
the side walls 135 can be opaque. The shield 131 can be designed such that
each channel 137 has the correct geometry to channel the light in a forward
direction away from the LED panel 132. In general, the shield 131 can
include a longitudinally extending planar top wall, or upper plate, 133 with
a plurality of perpendicular spaced shield walls, or partition, 135. The
spaced shield walls 135 can be arranged such that they are spaced to
accommodate the spacing of the LED groups 136 discussed above, as shown
in Fig. 5. Moreover, the shield walls 135 can have a length that is
approximately equal to the width of the top plate 133. The top wall 133 can
be translucent such that a desired amount of diffuse light is permitted to
shine through to create a glow effect on the back wall 110 of the housing,
creating a secondary glowing effect of the ember bed giving off more light
from its base. In alternative embodiments, each LED or group of LEDs 136
can have individual shade or cone walls, or partitions, disposed around each
group or around each LED. Such alternative walls can have alternative
shapes, geometries and configurations that provide the effect of creating
¶spot lights" to direct or focus the light in the desired areas of the
assembly.
[0055] In an alternative embodiment, a light source 132 and light
channel
131 can have LED groups 136, and the associated shield walls 135, closer
in the middle with gradually farther apart toward the outer edges. For
example, as shown in Figs. 6-8, the middle, first, two shield walls 135 can
be spaced a distance Dl. The shield walls 135' can be mirrored on either
side of the centerline in the illustrated embodiment, for the sake of ease,
only one side of shield walls 135' will be discussed. The second shield wall
can be spaced a distance D2' from the first shield wall, the third shield wall
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can be spaced a distance D3 from the second shield wall, and the fourth
shield wall can be spaced a distance D4' from the third shield wall. In the
illustrated embodiment, D1'<D2'<D3'<D4'. This can match the overall
design of the flame cutouts (taller in the middle) of a flame shield (not
shown) and will more effectively illuminate the center of the flame cutouts.
However, in other embodiments, the distance between the shields can be
equal, or have any suitable dimensioning.
[0056] Referring back to Figs. 3-5, the secondary effect of directing a
diffuse
glow onto the back-imaging panel 110 and side walls 110a, 110b can
contribute to the simulation of the glow of a real fireplace. For example, as
shown in Figs. 3-5, the flame simulation housing 122 can include a cutout
121 on the upper horizontal piece 126a of the lower rear wall 126. The top
surface 133 of the light shield 131 can be partially, or completely, disposed
within the cutout 121. As noted above, the light shield 131 can be
translucent so as to allow a desired amount of light from the LEDs to pass
therethrough. The light can pass up through the cutout 131 to the back
wall 110 to create a glow. The glow effect may be separate from the light
channel effect 131 and could be used independently of the light channel
shield 131. A translucent material of sufficient diffusive properties could be
used to take advantage of existing LED light, or light from a secondary LED
source to create a glow.
[0057] Referring to Figs. 4, 5, 9, and 10, the shield 131 can be
positioned
between the LEDs 134 and the flicker spindle, or rotating flicker rod, 142 or
between the flicker rod 142 and the flame effect cutout 150. The shallower
angle light channeled by the shield 131 effectively illuminates and creates
realistic vertically extending flame images, while the shield 131 blocks steep
beam angle light from jumping across to adjacent cutout portions 152 of the
flame screen 150 and creating distorted horizontally extending flame
images. Therefore, it can be seen that the simulated flame assembly 120
provides a unique solution to the problems of the prior art by providing a
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simulated flame assembly with a light channeling shield 131 that more
accurately directs shallow angle light through the flame screen cutouts 152
and provides a background glow effect.
[0058] The light from the light source 134 can pass through the light
shield
131 such that it is directed towards the rotating flicker rod 140. The light
that hits the flicker element, as shown via arrow A, can (A) be reflected
through the slotted flame screen, as shown via arrow B, and onto the
imaging wall, forming a simulated flame, and (B) pass intermittently
through the flicker element, as shown via arrow C, and onto the reflector,
where the light is reflected, as shown via arrow D, onto simulated ember, or
fuel bed, 160 creating a glowing or burning ember effect.
[0059] As noted above, light from the LEDs 134 is directed through the
light
channel 131 towards the flicker element portion 140 of the flame simulation
assembly 120. Generally, the flicker element 140 can be disposed on a
flicker rod 142 which turns about an axis that is generally located vertically
above at least a portion of the LEDs 134, for example above the light path A.
The rod 142 can be supported by the light simulation housing side panels
124a, 124b. Further, a motor (not shown) can be secured to one of the light
simulation housing side panels 124a, 124b and retain one terminal end of
the rod 142 therein. The motor can rotate the rod 142 such that the flicker
element 144 rotates with the rod 142 to create a flicker effect. In the
illustrated embodiment, the flicker element 144 can be a single piece of
reflective material that is threaded onto, and secured to, the rod 142 . In
some embodiments, the flicker element can be stamped as a single piece of
material, as shown in Fig. 12. The flicker element 144 can be alternatively
laser cut, manually cut, or molded. Further, the flicker element 144 can be
made from any flexible or semi-flexible material that is reflective. In one
embodiment, the flicker element 144 can be made from a reflective mylar
strip. The flicker element 144 can have a variety of shapes and designs to
permit the light from the LEDs 134 to selectively be reflected upwards
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towards the flame screen 150, or passed through to be reflected onto the
ember bed 160. In the illustrated embodiment, the flicker element 144 can
be threaded onto the rod 142 such that there are two types of paddles,
flicker shapes, or flamelets. A plurality of first "X" shaped type paddles
144a are fixed to the rod 142 in a first angular orientation relative to the
rod
and a plurality of second "X" shaped type paddles 144a fixed to the rod 142
in a second angular orientation relative to the rod. The plurality of first
"X"
shaped paddles and the plurality of second "X" shaped paddles 144a can be
angularly offset from one another with respect to the rod 142. The second
type of paddle can be an "I" shaped paddle 144b which can be angularly
offset from another set of "I" shaped paddles 144b and both of the plurality
of first and second "X" shaped paddles 144a. The relative spacing and
orientation of the various paddles 144 can be a function of how the flicker
element 144 is threaded onto the rod 142. Each of the "I" and "X" shaped
paddles 144a, 144b can have contoured edges, undulating outline, elongate
curvilinear outline, or a unique wavy patterned outline as shown in at least
FIG. 2A and 9-12. For example, the width of the arms of the paddles 144a,
144b can vary between thicker portions and thinner portions as a function
of the undulating outline.
[0060] As illustrated, the rod 142 of the flicker element 149 is
disposed
forward of the LED panel 132, towards the front wall 102a, and vertically
above the LEDs 132, away from the bottom wall 104b. In use, as the rod
142 is rotated by the motor, the distal ends of the paddles 144 move into and
out of the path of the light from the light source 132, such that the paddles
"dip" into the path of light, see light path arrows C and D, as shown in Fig.
2. The relative angular locations of the paddles 144 and the relative side-to-
side spacing thereof can permit a portion of the light to reflect off the
plurality of paddles 144 and onto the flame screen when they "dip" into the
path of the light. When the paddles 144 are not "dipping" into the path of
the light, the light is able to pass by or around the flicker element 140 and
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onto the ember bed reflector 170, as discussed further below, then up
towards the ember bed 160. The dipping flicker elements 144 creates a
fluttering light effect due to the flicker elements "intermittently dipping"
into the light path. This fluctuating light is reflected off the ember bed
reflector 170 through to both the ember bed 160 in front and the logs 192 to
create a dancing effect, which simulates glowing embers and logs. The
angularly offset relationship and linear spacing of the various paddles 144,
or flicker elements, can provide for the advantage of using a single light
source 130 to illuminate, or activate, the ember bed 160 and the simulated
flames (on the rear imaging wall 110).
[0061] In use, the light from the LED array 130 is directed, by the
light
shield 131, at the flicker element 140. A portion of the light is reflected
against the paddles 144 upward towards the flame screen 150. A further
portion of the light passes through the flicker element 140 towards the
ember bed reflector 170, which is discussed further below. Therefore, it can
be seen that the simulated flame assembly 120 provides a unique solution to
the problems of the prior art by providing a simulated flame assembly 120
with a reflected flickering light that relies on a single light source 130 to
light the fuel bed 160 and simulated flame yet provides a simulated burning
effect to both. Consequently, component manufacturing costs and electricity
usage of the simulated fireplace are reduced.
[0062] The light that is reflected upward from the flicker element 140
is
directed towards the flame screen 150 before passing to the back wall 110.
The flame screen can selectively permit the reflected light, from the flicker
element, through to the back wall. Advantageously, the exemplary flame
screen includes vertically non-continuous flame cut outs which are
segmented along the path of reflected light. The non-continuous flame
screen can, for example, be non-continuous in a vertical direction, or along
the beam angle, or light path, of the light source as shown in Fig. 16. In
some embodiments the flame screen can be removably fitted to the flame
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simulation housing so that alternate flame screens can be used. In other
embodiments, as shown in Figs. 3-5, the flame screen can be integral in the
housing.
[0063] Prior art flame screens 50, as shown in Fig. 13, can suffer from
elongated cutouts 52 which extend the entire length which the light would
be passing through. The result of the prior art flame screen 50 is that the
simulated flames are elongated and unrealistic. Referring now to Figs. 14,
15, and 16, exemplary embodiments of flame screens 150, 150' with non-
continuous flame segments 152, 152' are shown. The segments 152, 152'
can be generally non-continuous along a given beam path B. The flame
screen 150, 150' can include a plurality of slots 152, 152' forming flame
segments that are vertically or angularly non-continuous, have both curved
edges 154, 154', and sharper edges 156, 156' than prior art flame screens.
As shown in at least Fig. 16, a plurality of linear divergent light paths B,
extend generally up from the flicker element (not shown in Fig. 16), up to
750 from a vertical center line V. As noted above, the spread of the light
towards the flicker element, and up to the flame screen, is restricted by the
light channel 131. A plurality of the linear divergent light paths can cross
over the flame segments in a non-continuous manner such that a plurality
of both long and short non-continuous light projections are created on the
back wall of the fireplace. From a functional standpoint, the non-continuous
segments act to start and stop (permit and block) the light transmission
from the rotating flicker element, in an irregular pattern, i.e.
intermittently
flicker the light creating the flame to more realistically simulate the
dancing irregular non-continuous image of a "flame". As seen in at least
Fig. 9, the combination of the flicker element 140 having the paddles 144a,
144b, oriented such that they have differing undulating widths as well as
rotational sweeping through or dipping into the light, and the flame cut-outs
152, 152' create realistic flames on the back imaging wall 110. The unique
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shape of both the paddles 144a, 144b and the flame segments 152 result in
varied light paths from the light source 130 through the flame screen 150.
[0064] The flame segments 152, 152' can be arranged in a generally
triangular pattern, as shown in Fig. 14, with the center of the pattern
forming the peak 159' of the triangular pattern and the sides 158b' tapering
downward, dramatically and, thus, forming a more pronounced fire shape.
For example, the triangular pattern can include a lower straight edge 158a'
and two concave edges 158b' extending upward towards a topmost vertex.
In some embodiments, the triangular pattern can be an isosceles triangular
pattern. The flame segments 152, 152', as shown, can have a variety of
shapes and sizes, where collectively they form the flame pattern, but
individually do not necessarily form a flame pattern alone in isolation.
[0065] The exemplary flame screens 150, 150' can permit the light that
is
reflected up from the flicker element 140 to pass through the non-
continuous segments 152, 152' to create realistic flames on the rear wall 110
of the housing 101. The broken-up flames from the flame screen 150 are
seen, in conjunction with an optional glow effect from the rear of the flame
simulation housing to create a realistic flame.
[0066] As discussed above, some of the light, shown via arrow C, that
is
directed from the light source 130 towards the flicker element 140 passes by
the flicker element 140 as the paddles 144 dip in and out of the path of the
light. The light that passes by the flicker element can continue to the ember
bed reflector 170, as seen in Fig. 2 and 2A.
[0067] Referring now to Figs. 2 and 2A, the ember bed reflector 170 can
have
a generally exaggerated "Z" shape having a base portion 172 and at least
one reflector portion 174, 176. In the illustrated embodiment, the ember
bed reflector 170 can have a first reflector portion 174 and a second
reflector
portion 176 both extending upward at different angles. The ember bed
reflector 170 can be made from a sheet of reflective material that has been
bent or molded into the preferred shape. The faces of the first and second
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reflector portions 174, 176 are preferably reflective. In some embodiments,
the ember bed reflector 170 can be made from a reflective material or coated
with a reflective material. The reflector portions 174, 176 can be straight,
as shown in Fig. 2Bõ or have a convex angled shape, as shown in Fig. 2C, or
alternatively, have a curved or parabolic shape, either concave or convex, as
shown in Figs, 2D-2F. In an alternative embodiment, the second reflector
portion 176 may be omitted, as shown in Fig. 2B. In some embodiments, the
ember bed reflector 170 can be integrated into the cover 102a, as shown in
Figs. 2G and 2H. The light, shown via arrow D, can be reflected upward
towards the ember bed portion 160 and the log grate 190. The ember bed
160 itself can be disposed laterally rearward towards the rear wall 110 of
the enclosure 101. In some embodiments, the ember bed portions 160 and
the log grate 190 can be an integral assembly formed into a unitary piece.
Light from the ember bed reflector 170 can be reflected against the ember
bed 160 to illuminate it and the light can be reflected up towards the log
grate 190. On the log grate 190, one or more logs can be placed and the
front face of the log 192, in addition to the grate 190, can be illuminated
from the light, including from arrow D. A portion of the the log 194 can
have a shadow 196 where the light D is blocked by the grate bar 192. In
some embodiments the log 194 can additionally include an internal light
source 197 which may glow through the log in the area 196 where the
shadow is formed by the grate bar 192. The internal illumination creates an
internal glow in the shadow area 196 giving the appearance of actual
glowing embers. In some alternative embodiments, logs can be illuminated
from below by the light coming through the ember bed, as shown in Fig. 22
for example. In addition, or alternatively, the logs can be further
illuminated by secondary smaller light sources (not shown) disposed at
various locations within the logs themselves. The combination of the flicker
elements 144 and the ember bed reflector 170 can advantageously
illuminate the ember bed without the need for additional light source.
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[0068] Referring to Figs. 18-21, in an alternative embodiment 200, the
assembly can include a fully integrated ember bed 260 and flame screen 250
which are formed or molded into a single housing, or component, 222. The
embodiment of Figs. 18-22 can be generally the same as the first
embodiment of Figs. 1-16, however in place of the discrete, separate, ember
bed 160 and flame screen 150; an integrated, contoured, simulated fire
simulation housing 222 can be provided. In some embodiments, the single
component 222 can be manufactured from plastic, metal, or a composite
material. In one example, the single component 222 can be molded plastic.
As shown in Fig. 19, the integrated ember bed 260 and flame screen 250 can
form a generally shallow, inverted V-shape, similar to a roof, to hide the
flame screen 250 from view of the user and enhance the realism of the
simulated flame. At the peak 221 of the inverted V-shape, a groove 232 can
be formed to support the grates 290 which can hold the faux logs 292, as
shown in Figs. 18 and 22. In alternative embodiments, the grates 290 can
be integral with the ember bed assembly. Such an integrated ember bed
260 and flame screen 250 can additionally include a plurality of cut-outs 225
on the upper horizontal piece 226a of the lower rear wall 226 to permit light
from a light source 230 to pass through the light shield 231, similar to the
cut out of Figs. 3-5. Alternatively, in place of a plurality of smaller cut-
outs
225, the upper horizontal piece 226a can include several medium sized
windows, one large window, or no window at all. The integrated ember bed
260 can have a textured surface and/or a reflective coating. For example,
the reflective coating can include a combination of glitter, reflective metal
or
glass flakes, miniature piercings, translucent colored stained glass 262,
and/or a serrated bottom (not shown), to enhance the visual effect of burning
embers. In some embodiments, the integrated ember bed 260 can include a
motor and actuator arm to move the ember bed 260 with gentle pulsations
to create an added visual effect of burning embers. The integrated assembly
can advantageously provide for a lower cost manufacturing and assembly of
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the overall device 200 as there are less parts that need to be assembled and
connected. In some embodiments, the reflector 270 can be integral with the
ember bed as well. Alternatively, the reflector 270 can be integral with the
front wall of the enclosure, as discussed above with respect to Figs. 2G and
2H. In use, light is directed from the light source 230 past the flicker
element 240 to both the ember bed reflector 270, and on to the ember bed
260, and through the flame screen 250 in the same fashion as the
embodiment of Fig. 1-16. Further, a heater 213 is shown disposed in an
upper compartment 214 of the housing 201. As such, a detailed discussion
of the various sub-assemblies of this embodiment will not be repeated for
brevity.
[0069] In a further alternative, exemplary embodiment illustrated in
Figs.
23-26, the fireplace may be designed such that the ember bed reflector is
omitted to further reduce the overall footprint of the device 300. This can be
accomplished by reorienting the light source 330 and the flicker element
340. For example, the flame simulation assembly 320 can include a single
flame simulating light source 330 which can be used to illuminate both a
flame simulation screen 350 and a combined ember bed and log assembly
360. The flame simulation assembly 320 can generally include the flame
simulating light source 330, a light shield 331, a flicker element 340 which
can angle the light generated by the light array, and a flame screen 350.
The flame simulation assembly 320 can be a single subassembly housed by
the flame simulation housing 322. The flame simulation housing 322 can
have two sidewalls 324a, 324b, a lower rear wall 326, and an upper rear
wall 328. In the illustrated embodiment, the lower rear wall 326 can have a
generally angled "L" shape that includes an upper angled piece 326a and a
lower angled piece 326b. Extending upward and forward, at an angle, from
a forward edge of the upper angled piece can be the flame screen support
328, the flame screen support 328 can be at a steeper angle than the flame
screen support of Fig. 1.
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[0070] The single light array 330 can be disposed beneath the flame
screen
350 on the lower rear wall 326b of the flame simulation housing 322. The
light array 330 can include a plurality of bulbs disposed on a printed circuit
board (PCB) or mounted on a support 332 and wired together. In the
exemplary embodiment, the light array 330 can be oriented such that the
PCB 332 is at an angle relative to both the rear and front walls and the
bottom and top walls and the LEDs are angled upward. The angle of the
PCB and the light source can be approximately 20 degrees to 40 degrees
from the bottom panel of the housing. In some embodiments, the light array
330 can be a panel that includes a plurality of sources. The light channeling
shield 331 can similarly be angled upward, at an angle of approximately 70
degrees, in parallel to the upper angled piece 326a to direct the light
towards the flicker element 340. In some embodiments, the light shield 331
can be integrated, or molded, as part of the ember bed 360 and log mold 370
and/or molded with the flame screen 350, or all the aforementioned
components can be molded together. The upward angle of the light
channeling shield 331 and the light source 330 itself can direct a portion of
the light source directly towards the ember bed 360 and logs 370. Like the
other embodiments, the light source 330 projects light at the flicker
element, as shown as arrow A' such that some light, shown as arrow B', is
reflected towards the flame screen 350, as discussed above, and some of the
light, shown as arrow C', is directed towards the ember bed 360 and logs 370
as the flicker paddles 344 dip in and out of the light path. The flicker
element 340 can include the rod 342 and the flicker rod 343 can be disposed
above, and forward of, the light channeling shield 331 and light source 330.
The ember bed 360 and logs 370 can be a single piece molded from plastic
that is selectively thinned in strategic locations (not shown), such that
light
may pass through the thinned portions of the plastic material, creating the
glowing and/or burning ember effect. Due to the relative locations and
steep angles of the light source 330, the light channel 331, flicker element
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340, and the ember bed 360 can be disposed closer together, thereby
permitting the depth of the device 300 to be further reduced. In some
embodiments, the ember bed 360 and the flame simulation housing 322 can
be integrated into a single unit, like the embodiment of Figs. 18-22.
[0071] Turning to Fig. 27, there is shown another exemplary embodiment
generally indicated at 400. The structure is shown schematically and is
similar to the embodiment shown in Figs. 1-15, with some modifications of
the light source and reflector arrangement. The assembly 400 includes a
light source 402, an imaging wall 404 disposed above the light source 402,
and a rotating flicker rod 406 having a plurality of reflective flicker
elements configured and arranged to reflect the light from the light source
402 and create fluctuating light on the imaging wall 402. The flicker rod
406 is disposed in the path of the light source 402. The assembly 400
further includes a simulated fuel bed 408, a front reflector 410 and a rear
reflector 412 adjacent the light source 402.
[0072] In operation, a portion of the light from the light source 402
intermittently passes through the plurality of flicker elements on the
rotating flicker 406 rod to illuminate the simulated fuel bed 408 and create
a glowing or burning effect thereon. Unlike the above embodiments, the
flicker rod 406 rotates about a central axis and the light source 402 is
disposed above (rather than below) the central axis of the flicker rod 406.
As in the above, embodiments, the flicker rod 406 is at least partially
disposed between the light source 402 and the front reflector 410, and light
from the light source 402 is reflected off the front reflector 410 to
illuminate
the simulated fuel bed 408. The rear reflector 412 is disposed below the
light source 402 which reflects light forwardly toward the flicker rod 406
and the front reflector 410. Similar to the above embodiments the light
source 402 includes a plurality of lights all disposed at a single height
relative to the flicker rod 406.
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[0073] The flame simulating assembly 400 further includes a flame cut
out
screen 414 wherein light is reflected off the plurality of flicker elements
upwardly towards a flame cut out 414 before illuminating the imaging wall
404.
[0074] Turning to Fig. 28 there is shown a further exemplary embodiment
generally indicated at 500. The structure is shown schematically and is
similar to the embodiment shown in Figs. 1-15, with some modifications of
the light source and reflector arrangement. The assembly 500 includes a
light source 502, an imaging wall 504 disposed above the light source 502,
and a rotating flicker rod 506 having a plurality of reflective flicker
elements configured and arranged to reflect the light from the light source
502 and create fluctuating light on the imaging wall 504. The flicker rod
506 is disposed in the path of the light source 502. The assembly 500
further includes a simulated fuel bed 508, a front reflector 510 and a
reflective floor 512 beneath the flicker rod 506 between the light source 502
and the front reflector 410. The reflective floor 512 may be mylar film or
other reflective paint, such as silver paint.
[0075] In operation, a portion of the light from the light source 502
intermittently passes through the plurality of flicker elements on the
rotating flicker rod 506 to illuminate the simulated fuel bed 508 and create
a glowing or burning effect thereon. The flicker rod 506 rotates about a
central axis and the light source 502 is disposed above the central axis of
the flicker rod 506. As in the above, embodiments, the flicker rod 506 is at
least partially disposed between the light source 502 and the front reflector
510, and light from the light source 502 is reflected off the front reflector
510 to illuminate the simulated fuel bed 508. The reflective floor 512 is
disposed below the flicker rod 506 and light source 502 and reflects or
channels light forwardly and/or upwardly toward the flicker rod 506 and the
front reflector 510. Similar to the above embodiments the light source 502
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includes a plurality of lights all disposed at a single height relative to the
flicker rod 506.
[0076] The flame simulating assembly 500 further includes a flame cut
out
screen 514 wherein light is reflected off the plurality of flicker elements
upwardly towards a flame cut out 514 before illuminating the imaging wall
504.
[0077] Turning to Fig. 29 there is shown a further exemplary embodiment
generally indicated at 600. The structure is shown schematically and is
similar to the embodiment shown in Figs. 1-15, with some modifications of
the light source and reflector arrangement. The assembly 600 includes a
light source 602, an imaging wall 604 disposed above the light source 602,
and a rotating flicker rod 606 having a plurality of reflective flicker
elements configured and arranged to reflect the light from the light source
602 and create fluctuating light on the imaging wall 604. The flicker rod
606 is disposed in the path of the light source 602. The assembly 600
further includes a simulated fuel bed 608 and a front reflector 610. The
light source 602 may comprise stacked rows of LED's both above and below
the central axis of the flicker rod 606.
[0078] In operation, a portion of the light from the light source 602
intermittently passes through the plurality of flicker elements on the
rotating flicker rod 606 to illuminate the simulated fuel bed 608 and create
a glowing or burning effect thereon. The flicker rod 606 rotates about a
central axis and the light source 602 is disposed both above and below the
central axis of the flicker rod 606. As in the above, embodiments, the flicker
rod 606 is at least partially disposed between the light source 602 and the
front reflector 610, and light from the light source 602 is reflected off the
front reflector 610 to illuminate the simulated fuel bed 608. As noted above,
the light source 602 may include a plurality of lights disposed in stacked
rows and at multiple different heights relative to the flicker rod 606.
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[0079] The flame simulating assembly 600 further includes a flame cut
out
screen 614 wherein light is reflected off the plurality of flicker elements
upwardly towards a flame cut out 614 before illuminating the imaging wall
604.
[0080] Although the embodiments shown herein illustrate a simulated
flame
with a front projection system onto an imaging wall, it would be appreciated
by one skilled in the art that the simulated flame assembly described herein
may be adapted for a rear projection configuration, or an indirect projection
using one or more mirrors. In particular, instead of light projected onto an
imaging wall at the back of the enclosure, the light could be projected
forward onto a rear surface a light-transmitting imaging screen that is
positioned forwardly and closer to the ember bed.
[0081] Further, it would be appreciated by those skilled in the art
that
various changes and modifications can be made to the illustrated
embodiments without departing from the spirit of the present invention. All
such modifications and changes are intended to be within the scope of the
present invention. While the present disclosure provides for various
embodiments, it is intended for the subassemblies of the various
embodiments to be discrete subassemblies that can be used in the various
embodiments interchangeably.
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