Note: Descriptions are shown in the official language in which they were submitted.
1045886
The present invention re~lates to a kitchen ventilator
according to the pre~mble of the enclosed claim 1.
Known such kitchen ventîlators are usually designed as
an air intake hood situated underneath the bottom side of a wall
cupboard~ said hood projecting out in front of the contour of
the cupboard~ and a fan part mounted above the hood inside the
cupboardO Such a kitchen ventilator is bulky and difficult to
mount. Due to its irregular shape, it is also difficult to pack
compactly for storage and transport between the manufacturer and
the place of mounting.
The purpose of the present invention is to avoid the
above-mentioned disadvantages and develop a kitchen ventilator
having a compact design and regular contours.
According to the invention, this is achieved by means of
a kitchen ventilator which has the characteristics disclosed in
claim 1.
A kitchen ventilator designed according to the invention
can be designed as a regular box having six flat sides without
any projecting sections. By means of the components of the
- 20 kitchen ventilator being arranged laterally outside of the fan -
housing~ the total height of the ventilator can be determined
by the space required for the fan. In this manner it is possible
to design the fan so that it is low and has a large diameter as~
contrary to what has previously been possible~ it can be allowed
to project out beyond the contour of the wall cupboard.
Thus, the entire kitchen ventilator can be designed to
have a very low height~ for example only 8 cm~ and can thereby
be easily mounted below existing wa~l cupboards as no holes for
.. ,, .. , , ~
- . . ::
.
104S886
upwardly projecting fan housings need be arranged in the
cup~oard. By means of .he walls of the air channels totall.y
spanning -L-he distance between the bottom plate and the upper
wall o~ the upper sec-tionJ a pressure~resistant unit with
regard to packaging and transport is also formed. .- :
If the electric components of the kitchen ventilator are
collected in the upper section and the air-channeling details
are arranged on the removable bottom plate, very good
accessibllity for cleaning is obtained.
The grease collecting filter is suitably arranged in the :
form of a thin filter cake which is removably attached to the . ~:
bottom pla-te and which leads air directly into the fan wheel of
the radial fan without any connecting air channels. In this
manner~ bulky intake ducts are avoided.
When the kitchen ventilator is provided with downwardly ;
beaming lamps, the lamp housing is suitably composed of ~.
transparent plastic material and is arranged to be removably
connected to the bottom plate which is made out of metal
: sheeting. Alternately~ the entire bottom plate can be made of ..
transparent plastic material. ~ -
Preferably, the kitchen ventilator according to the
invention is designed as a combined evacuation and recirculati.on ~.
ventilator~ a valve being arranged to lead the air coming from .
the fan to one or both of two outlet openings in the kitchen .-.
ventilator. The valve consists suitably of a valve flap which .
; extends between the bottom plate and the upper wall of the
upper part and hereby contributes to stiffening the kitchen
ventilator during transport simultaneously as an inexpensive .~.. ~.. .
-2- ~
~. - , . ., .. : .. .
.. ~. . . : ... : .. . .. ... ...
104S886
and, in terms of flow~ advantageous valve construction is
obtained. The odor removal filter can be arranged in a
container on the bottom side of the upper wall of the upper
section along the front edge of said upper wall~ whereby an
air chamber is formed by the bottom plate below the filter
unit. Within this area~, -the bottom plate can be provided
with downwardly directed airflow guides, whereby an air
curtain is produced which prevents vapors rising from the
kitchen stove from flowing out past the kitchen ventilator.
The arrangement has the advantage of the air curtain only
being produced when the kitchen ventilator, through the
; valve, is adjusted or set for recirculation of the air. In
this operational state~ the outflowing recirculated air can
produce disturbing air flows upwards past the kitchen
ventilator. When the kitchen ventilator is adjusted or set
- for evacuation of air, maximum evacuation volume is sought
simultaneously as the need for a shielding air curtain is
less.
A further advantage of the above-described valve
construction having a valve flap is that operating means
for the valve can be arranged directly on the valve flap
and be accessible through an opening in the bottom plate
so that transferring mechanisms between the operating means
,,. ~ ,
and the valve are avoided at the same time as no operating
means project beyond the contour of the kitchen
ventilat~r.
'
. . .
-3-
1045886 ~:
Further properties and advantages of the invention are
revealed by the following des ription of an embodiment in the
form of a kitchen ventilator intended for both evacuation and
recirculation. Reference is made to the accompanying drawings.
Fig. 1 is a perspective view of the kitchen ventilator
disassembled into its three main components~ Fig. 1a showing
the upper section~ Fig. 1b showing the bottom plate and Fig. 1c
illustrating the front cover. Fig. 2 shows a cross section of
the ventilator along line II-II in Fig. 1 but with the grease
filter cut along line II~II in Fig. 3. Fig. 3 shows the grease
filter as seen from the inside of the ventilator. Fig. 4 is a
rear perspective view of one rear corner of the ventilator, two
- alternative outlet openings being included therein. Fig. 5 --
shows the va~ve and valve operating means of the ventilator as
seen in a vertical section along the line V-V in Fig. 1, and
Fig. 6 shows essentially the same view when the valve is being
disassembled.
The kitchen ventilator is built up of three substantially
metal plate main components: an upper section 1~ a bottom plate
2 and a front cover 3. In the assembled state, these three main
components form a box-like kitchen ventilator having six flat
sides. The upper section 1 consists of a downwardly open box
having an upper wall 4 and side and back walls 5~ 6 and 7,
respectively, projecting vertically downwards from said upper
wall. The bottom plate 2 is designed as an essentially flat
plate having a vertically upwardly projecting rear wall 8. The
front cover 3 is designed as a downwardly and backwardly open
box having an upper wall g and side and front walls 10, 11 and
_4_ -
,','' :,'
1045886
12, respectively, projecting vertically downwards from said
upper wall 9. In the operational position, the bottom plate 2
is supported at its rear edge by a narrow metal plate ledge 13
which projects horizontally out from the bottom edge of the
rear wall 7 of the upper section 1. In the front, the bottom
plate 2 is supported by the front cover 3, the side and front
walls 10 - 12 of which have a horizontally inwardly directed
metal plate ledge 14 extending along the lower edge of the
front cover. When the front cover 3 is slid onto the upper
section 1, the metal ledge 14 engages the bottom plate 2 along
its front edge and the forward parts of its side edges and
thereby supports the same. The upper wall 4 and the side walls
; 5,6 of the upper section 1 are impressed within the front
portion of the upper section 1 surrounded by the front cover 3
so that the outer sides of the upper wall of the front cover 3
and the rear parts of the upper wall of the upper section 1
will lie in the same plane when the front cover 3 is slid onto
the upper section 1. The impression edge 15 is shown for side
'' -`" ~1 walls 5 and 6 in Fig. 1 and for upper wall 4 in Fig. 2, which
also shows how the upper wall of the front cover lies in the
same plane as the rear part of the upper wall 4 of the upper
section 1.
The kitchen ventilator is intended to be hung under a
cupboard or console above a kitchen stove. For this purpose,
the upper wall 4 of the upper section 1 is provided with holes
placed in a suitable manner for attachment screws. Fig. la shows
- an embodiment having four holes 16 of which two are hidden by
the wall 6,
: :'~' ~
-- 5 --
' .. .. ! '
1045886
All of the electrical details are collected in the
upper section 1. The electric motor 17 for the fan is screwed
essentially centrally onto the bottom side of the upper wall 4;
Figs 1 and 2. The motor rotor 18 supports a radial fan wheel
19 which comprises an outer rim of fan blades 20 which, in the
operating position, stand vertically, said fan blades projecting
out from a fan wheel disc 21. The free ends of the fan blades 20 ~ .
are interconnected by a ring 22 The entire fan wheel 19 is
designed as an integral unit of resilient plastic material, the ~.
inner portion of the fan wheel disc 21 being bent down to form
a hub 23 which is provided with vertical slots 24 In this
- manner, the fan wheel 19 can be removably held onto the rotor 18
of the electric motor 17 by means of a bead 25 in the hub 23 ~ :
resiliently engaging in an annular groove 26 in the rotor 18. : . -
Current supply to the electric motor 17 takes place with ..
the help of electric wires (not shown here) which are drawn
through a passage formed by a metal plate channel 27 welded onto `
the bottom side of the upper wall 4 of the upper section 1.
Said channel 27 extends trans~ersely across a greater portion of
~ 20 the width of the upper section 1. A lamp holder 28 for a
lightbulb 29 is attached to the left end of the channel 27 The
: electric wire 30 for current supply of the lamp is also drawn
:............ through the metal plate channel 27. In a corresponding manner,
a lamp holder 31 for a lightbulb 32 is attached to the right end
of said channel 27.
A portion of the right-hand section of the channel 27
. and, optionally, the lamp holder 31 are surrounded by a box 33
made of sheet metal or plastic, said box 33 belng connected to
~ ''' ,-'',: .
- :'
:: ' .
' '
1045886
the upper wall 4 and having vertical side walls 34, a vertical
front wall 35 and an essentially flat bottom 36. The box 33
extends from the channel 27 up to the forward edge of the upper
section 1 and the front wall 35 of the box 33 lies in the same
plane as the front edge of the upper section 1. The channel 27
is open in a manner not shown here inside the box 33. The box
contains, for example, terminal blocks, switches and capacitors
for connection and rpm-control of the fan motor 17 and connection
of the lamps 29,32, These components which are known per se are
not shown in any detail in the drawing but Fig. 1 shows three
pushbuttons 37 projecting from the front wall 3~ of the box 33,
said pushbuttons extending through an opening 37' in the front
wall 12 of the front cover 3 and being used for control of the
switch in the box 33. Current supply to the box 33 takes place
with the help of an electric current supply wire 38 which is
arranged in a plastic cable duct 39 extending straight back
from the box 33 below the upper wall 4. The front end of the
cable duct 39 is supported by thè rear wall of the box 33 (not
shown here) The rear end of the cable duct 39 extends through -
a hole in the area connection the rear wall 7 and upper wall 4
of the upper section 1 and is provided with an angular flange 40
` which, from the outside, abuts said upper section walls; cf.
Fig. 4. In this manner, the cable 38 can be drawn out of the
; upper section in a backward or upward direction without extending
in the unused direction beyond the contour of the upper section 1.
The kitchen ventilator details intended for guiding air
$ flow are essentially collected on the bottom plate 2 The fan
housing is composed of a vertical sheet metal strip 41 (Fig. lb)
~ , .
~ .
,
1045886
welded to the bottom plate 2 and bent in a spiral shape, one
end of which is welded to the rear wall 8 of the bottom plate 2,
The other end of the strip 41 lies at a distance from the back
wall 8. The strip 41 has the same height as the back wall 8 and
this height is adapted so that the upper edge of the strip
sealingly abuts the upper wall 4 of the upper section when the
bottom plate 2 is arranged in operating position in the upper
section 1. The fan housing is restrlcted upwards by the upper
wall 4 of the upper section 1, downwards by the bottom plate 2
and laterally by the sheet metal strip 41 which forms the fan
housing wall. The outlet opening of the fan housing is formed
between the free end of the strip 41 and the rear wall 8. The
upper edge of the strip 41 is provided with recesses 42 intended -
to engage with and sealingly connect with the channel 27 of
the upper section 1,
Within the strip 41 forming the fan housing and centrally
below the fan wheel 19 of the upper section, the bottom plate 2 ~-
is provided with an air intake opening 43 in which a grease
collecting filter 44 is arranged. The grease filter 44 shown
especially in Figs 2 and 3 is designed as a flat circular
filter unit comprising an upper and a lower filter holder 45 and
; 46 respectively and an intermediate ring 47 of grease filtering
material such as several layers of expanded metal, fiber
material or porous plastic foam. The filter ring 47 rests upon
the lower filter holder 46 which is designed as a spoke wheel
without any center and having an axially directed wall 48
extending along its outer circumference, said wall 48 being
intended to fit into a eheet metal rim 49 projecting up from the
` ':
. ~
,
lO~S886
bottom plate 2. Like the upper filter holder 45, the lower
~ilter holder 46 is composed of resilient plastic material and,
at the upper edge of the wall 48, is provided with radially
projecting nibs 50 which are uniformly distributed along the
circumference and arranged to grip the upper edge of the rim 49
and thereby hold the filter unit 44 onto the bottom plate 2, The
position of the filter unit 44 is defined by an annular flange
51 which projects radially from the lower edge of the wall 48
and engages an impression 52 between the bottom plate 2 and its
rim 49, By means of radial spokes 53, the wall 48 is connected
to an inner upright wall 54. The spokes are braced by two
concentrical circular ribs 55 and 56.
. The upper filter holder 45 has a central bowl-shaped
part having an externally flat bottom 57 and an axially directed
surrounding side wall 58, Radial spokes 59 project from the -. :.
upper edge of the side wall 58, the outer ends of said spokes
~: supporting an annular guide vane 60. The spokes are braced by a
` circular rib 61. The guide vane 60 is provided with radially
~`, projecting lugs 62 distributed along the circumference. Said
lugs, in t~e assembled position of the filter 44, rest against
the bottom of recesses 63 in the upper edge of the outer wall 48 ~ -
of'the lower filter holder 46. The upper filter holder 45 is
held against the lower filter holder 46 by means of the upper
edge of its inner wall 54 being provided with radially inwardly
projecting nibs 64 distributed along the circumference and
engaging the bottom of recesses 65 in the upper edge of the
inner wall 58 of the upper filter holder 45. Thus, the entire
:~ filter unit 44 can be disassembled from the bottom plate 2 by
_ 9 _
,. :
. . ,, . . . . : ~
1~)4588~;
means of the user inserting a pair of fingers through the
openings between the spokes 53 and pulling the lower filter :~
holder 46 downwards, whereby its outer wall 48 is resiliently
bent inwardly so that the nibs 50 can pass the rim 49. In a
corresponding manner, the upper filter holder 45 is removed
from the lower filter holder 46 so that the filter ring 47 can
be removed for cleaning or replacement. Assembly is effected by
snapping the parts together in the converse order, The bottom
57 of the upper filter holder 45 is inwardly provided with a
shallow circular recess 66 intended to provide space for the
rotor 18 of the fan motor 17, said rotor extending almost all
the way down to the lower plane of the bottom plate 2,
~ he inner diameter of the rim 49 projecting from the
bottom plate 2 is so great that when the filter unit 44 is
removed, the fan wheel 19 can be removed from the kitchen
ventilator by means of being pulled down through the opening 43
in the bottom plate 2. The guide vane 60 of the upper filter
holder 45 extends radially inwards so far that its soft,
upwardly turned inner edge 67 is situated radially inside the
fan blade ring 22 of the fan housing 19, Furthermore, the edge
67 projects radially inwards so far that it lies essentially
in the same plane as or even inside the outermost axial
restriction plane of the fan blade ring 22. In order that the
ring 22 and the guide vane 60 shall not touch each other as a
result of vibrations or the like, the axially inwardly-turned
side of the guide vane 60 is provided with a circumferential
recess 68. By means of this arrangement, a sort of labyrinth
seal is formed and the air taken in through the filter 44 is
-- 10 --
- . . ~ . : , . . .
:104S886
led directly into the fan housing 19 without any loss and
without any intermediate flow ~lucts.
A lamp housing 69 in the form of an upwardly and
laterally open box having a front wall 70, a rear wall 71 and a
side wall 72 is situated on the left-hand side of the bottom
plate 2 (Fig. lb). All of the walls stand up at right angles
from a lamp housing bottom 73 which lies in the same plane as
the bottom plate 2. The lamp housing 69 is an integral unit
made of transparent plastic material and the bottom 73 is : :
suitably impressed with a pattern. The lamp housing 69 is held
onto the bottom plate 2 by means of it being provided with a
groove extending along the lower edges of walls 70, 71 and 72,
said groove sliding onto the plate edges of a rectangular recess
arranged in the side of the bottom plate 2 (not shown here). -
The lamp housing walls are of the same height as the fan housing
wall 41 and, thus, seal against the upper wall 4 of the upper
section 1 when the bottom plate 2 is mounted into the upper
part. The side wall 72 has a recess 74 for the channel 27,
In a corresponding manner, the right-hand portion of the
bottom plate 2 is provided with a lamp housing 7~ comprising a
front wall 76, a rear wall 77, a side wall 78 a~d a bottom 79,
The front wall 76 and the side wall 78 have a recess 80 intended
to sealingly abut the connection box 33 and channel 27 of the
upper section 1 The walls in general are of the same height as
the fan housing wall 41 and, in the assembled state, abut the
upper wall 4 of the upper section 1. The outer edge of the
bottom 79 is provided with an upstanding stiffening ridge 81.
The rear wall 77 of the lamp housing 79 is softly curved ~:
--11-- .
1045W6
90 backwards and extends over the bottom plate 2 to sealing
abutment against the rear wall 8 of said bottom plate. The rear
wall 8 of the bottom plate 2 is provided with a rect~ngular
opening 82 within the rear wal:L 77 of the lamp housing. Said
opening 82 forms an air outlet opening from the fan housing.
In the assembled state of the ventilator, the opening 82 lies
directly opposite an opening 83 arranged in the rear wall 7 of
the upper section 1, said upper section rear wall opening 83
forming a backwardly directed air outlet opening for the
ventilator. An alternative, upwardly directed circular air
outlet opening 84 is arranged in the upper wall 4 of the upper
section 1 above the space which is defined by the bottom plate
2, its rear wall 8 and the rear wall 77 of the lamp housing.
Air flowing from the fan housing flows along the rear wall 8 of
the bottom plate to said space and can flow out through either
of the air outlet openings 83,84. Preferably both of these
openings 83,84 are sealed at delivery of the ventilator, for
example, by means of the sheet metal pieces which have been cut
out so as to form the openings not having been removed. Rather,
20 they can remain attached to the upper section 1 by means of
thin metal portions. When the ventilator is installed, the sheet
metal piece which exposes the desired air outlet opening can
then be broken away.
Connection of the kitchen ventilator to an evacuation ~
duct is effected by means of a loose connection piece. ~ -
Preferably, two such connection pieces 8~,86 are provided, one ~
for each air outlet opening 83,84. The connection pieces 85,86 ~ :
are designed as rectangular and circular sheet metal pipe
- 12 -
- ................ . ... " . :......... . .......... ..
- . . . . ~
1045886
sectionS, respectively, and have a perpendicularly extending
collar 87,88 respectively. When the ventilator is assembled,
the desired sheet metal piece is broken away so as to expose
the intended outlet opening 83 or 84, after which the
connection piece 85 or 86 respec-tively is inserted through the
opening from the inside of the upper section 1 until the collar
87 or 88 respectively abuts the inside of the rear wall 7 or
the upper wall 4 respectively. The evacuation duct is thereafter
connected to the projecting portion of the connection piece.
Fig. 4 shows bo-th connection pieces 8~,86 assembled, but,
naturally, only one or the other connection piece is intended
to be used for any one installation. The axial length of the
- connecting piece 86 is at most so great that during storage and
delivery of the ventilator, the connection piece can be stored
in the space formed between the upper wall 4 of the upper
section, the bottom plate 2, the fan housing wall 41 and the
side wall 78 of the lamp housing 75. In a correspunding manner,
the connection piece 85 can be stored in the space in front of
the opening 82 in the rear wall 8 of the bottom plate 2. No air
connection details project out beyond the contour of the box-
like kitchen ventilator and, thus, it can be compactly packed.
The kitchen ventilator can also be used for blowing
filtered recirculation air. For this purpose, the upper forward
edge of the upper section 1 is provided with a trough 89 (Fig.
1,2) extending between side walls 5 and 6. The trough is open
upwardly and has a perforated bottom 89 ' . The trough 89 is . . .
intended to contain odor-removing filter material 90, for
example, active carbon in a suitable cartridge or in loose form.
"-,.',:
- 13 - ~
1045886
The air outlet opening intended for recirculation air consists~
in this case, of a field 91 of perforations arranged above the
trough 89 in the upper wall 9 of -the front cover 3 when said
cover is pushed into its operating position. The filter trough
89 is fed with air from the fan housing 41 via an air chamber 92
which extends under the trough 89 and is defined by the side
and front walls 10-12 of the front cover 3 and the bottom
plate 2.
Inside the air chamber 92, the bottom plate 2 is provided
with air outlet openings 93. These are formed by impressions
made from below in the bottom plate 2, whereby the holes in the
bottom plate 2 widen downwards. In this way, downwardly directed
streams of air are produced in a manner known per se, said
streams of air forming an air curtain which screens off the area
under the kitchen ventilator and thereby prevents vapors from
the kitchen stove from ~lowing laterally outside of the kitchen
ventilatorO ~ '
Both ends of the rear wall 94 of the trough 89 are ;~
provided with a downwardly-backwardly embossed sheet metal
tongue 95O Said tongue forms a hooking means which cooperates
with a locking boss 96 arranged on the upper end of the forward
wall 70 and 76 respectively of both of the lamp housings 69 and
75 respectively. When the bottom plate 2 shall be mounted in the
upper section 1~ the bottom plate is placed with its rear edge
on the ledge 13, after which it is swung up so that the locking
bosses 96 pass over the plate tongues 95 by means of the walls ~ ~-
70,76 springing backwardsO The bottom plate 2 is held
provisionally in this manner in an uplifted position until the
-14-
1045886
front cover 3 is mounted and ]ocks the bottom plate 2. During
disassembly of the bottom plate 2, the front walls 70,76 of the
. .... . .
lamp housing are pressed back~ards until the locking bosses 96
pass freely behind the tongues 95, after which the bottom plate
can be swung down and removed.
The air flowing out from the fan housing can be led
either to the outlet openings 83,84 for evacuation or to the
filter trough 89 and outlet opening 91 for recirculation or it
can be distributed in a desired manner to both of these outlet
openings 83,84 and 91 respectively. Distribution is effected by
means of a valve which can be manually adjusted from below the
ventilator. Said valve is shown in Figs. 1b, S and 6. The valve
which is connected to the bottom plate 2 comprises a valve flap
97 arranged perpendicular to the bottom plate 2 between the fan
housing wall 41 and a wing 98 projecting out from the side wall
78 of the lamp housing 77 and designed as an extension of the
rear wall 77 of the lamp housing. The valve flap 97 has the
.
same height as the fan housing wall 41 and is pivotable about a
vertical axis line along that edge of the valve flap which is
situated nearest the wing 98. In the valve flap 97 position
illustrated by solid lines in Fig. 1b, the valve flap outer
edge sealingly abuts the fan housing wall 41 and thereby blocks
the air flow to the air chamber 92. The second end position of ~:
.~ .. . .
the valve flap 97 is illustrated by dot-dash lines, in which
position the free edge of the valve flap sealingly abuts the
rear wall 8 of the bottom plate 2 and thereby blocks the flow
of air into the evacuation openings 83,84. Adjacent its axis ~ ~ `
line, the valve flap 97 is provided with a circle segment ~
, .
~ -15-
,
104~i886
flange 99 projecting perpendi~ularly towards the ~an housing
from the upper edge of said valve flap. In the position
illustrated by the dot-dash lines9 the circle segment flange
seals a portion of the air outlet opening 84 situated above the
straight valve flap 97 so that said opening is totally closed.
Figo 5 shows a vertical section drawn through the side
wall 78 and bottom 79 of the lamp housing 75 and the bottom
plate 2 and a handle 100 for turning the valve flap 97. The
handle 100 comprises a circular bowl 101 which is formed
integrally with the valve flap 97 and opens downwards, the lower
annular edge 102 o~ said bowl abutting an annular seat 103
arranged in a lateral extension 104 of the bottom 79 of the
lamp housing 75. The extension 104, as the rest of the lamp
housingg has a circumferential groove 105 in which a raised
edge 106 of the bottom plate engages so that the bottom face of
the extension 104 and the bottom 79 of the lamp housing lie in
the same plane as the bottom face of the bottom plate 2. The
lamp housing 69 also has a corresponding arrangement. A
diametrical wall 107 is arranged in the bowl 101, said
diametrical wall lying within the plane of the bottom 79 and
forming a finger-grip for turning the bowl 101. The wing 98
extends over the bowl 101 and the bottom edge of said wing i5
provided with a recess 108 which seals against the upper side
of the bowl 101 and has an edge 109 extending adjacent to the
wall 78 and projecting into a circle-arc-shaped recess 110 in
the outer periphery of the bowl 101. When the bowl 101 is
turnedg the end edges of said recess will abut the wing edge
109, whereby the turning range of the bowl 101 is restricted.
- -16-
::
:. ~ - ' ' ': . . : ~ ' ;: ' :'
-: .
11~458~;
The lamp housing 75 an~ thus the bottom extension 104 of
the same are composed of a resilient material~ This property is
utilized in order to ma]ce possible assembly and disassembly of
the valve flap 97 and to provide the same with snap rest
positions within its pivoting range. Fig. 6 shows the lamp
housing 75 removed from the bottom plate 2. The extension 104
can then be bent downwards in the shown manner so that the
annular edge 102 of the bowl 101 passes freely over the seat
103 simultaneously as a central recess 111 (Fig. 5) in the
center of the upper face of the bowl 101 passes freely under a
pin 112 arranged at the bottom edge of the free edge of the
wing 98. The bowl 101 can then be laterally withdrawn from its
operational position between the extension 104 and the wing 980
Fig. 6 reveals that the lower annular edge 102 of the bowl 101
is provided with a collar of downwardly directed projections
113 arranged to cooperate with depressions (not shown here) in
the seat 103. Due to the resilient properties of the extension
104 and the wing 98, snap positions are formed for the various
angular settings of the valve flap 97.
Nor do the operating members of the damper project
beyond the smooth side surfaces of the box-li]ce kitchen
ventilator. Only the switch buttons 37 and the current supply
cable 38 project beyond the flat outer contours of the kitchen
ventilator and, thus~ said ventilator is easily compactly
packed. The kitchen ventilator forms a rigid~ pressure resistant
unit due to the fact that the sheet metal strip 41 of the fan
housing, the walls 7G-72 and 76-78 of the lamp housing and the
valve flap 97 span the entire distance between the bottom
-17-
. ~ . . ,, ............ . ~ . .. .
,~ : . : ~ ' , ' '
..
~C)45886
plate 2 and the upper wall 4 of the upper section 1. Further-
more~ the forward portion of the kitchen ventilator can be made
more rigid during transport by means of the connection shoulder
86 having such a height that it fits precisely in between the
S bottom plate 2 and the bottom 89' of the filter trough 89.
~ '
-~'
-18- ~ :
.
-, : .: . .. . . . :
: . . , ~ : - .,. . :
: ' , : , ~: . - . ~ ' ' ,: , :
