Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
CA 03056827 2019-09-17
Partition Wall System Having Air Purification Function and Method for
Purifying Air
Technical Field
The present application relates to, but is not limited to, a partition wall
system having an air
purification function and a method for purifying air.
Background
Indoor formaldehyde pollution primarily comes from furniture, artificial
boards, various
adhesive coatings and synthetic textiles, or the like. Indoor formaldehyde
pollution affects
people's health, to which a great attention has been paid. The harm of indoor
formaldehyde to
human health primarily includes irritant effects, toxic effects and
carcinogenic effects. If no
effective measures are taken, formaldehyde volatilization would last for 3-15
years, seriously
affecting the quality of the indoor environment where people live.
Summary
The following is a summary of subject matters described in detail herein. The
present
summary is not intended to limit the scope of the claims.
The present application provides a partition wall system capable of reducing
indoor
formaldehyde.
Particularly, the present application provides a partition wall system having
an air
purification function. The partition wall system includes an inner
plasterboard, a keel, a thermal
insulation layer, an outer plasterboard, a one-way breather membrane, and a
cavity. The one-way
breather membrane is disposed between the thermal insulation layer and the
outer plasterboard.
The cavity is disposed between the thermal insulation layer and the one-way
breather membrane.
In addition, the cavity is configured to be in fluid communication with an air
vent of a house. The
outer plasterboard contains a formaldehyde degradation material.
In the present application, the one-way breather membrane only allows harmful
gases such
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as free formaldehyde to enter the cavity from the outer plasterboard, and does
not allow the
harmful gases such as formaldehyde to return from the cavity to the outer
plasterboard.
In one embodiment of the present application, the inner plasterboard may
contain a
formaldehyde degradation material.
In one embodiment of the present application, the formaldehyde degradation
material in the
outer plasterboard may be sprayed on the surface of the outer plasterboard
and/or added into the
board core of the outer plasterboard, the formaldehyde degradation material
sprayed on the
surface of the outer plasterboard may be visible-light formaldehyde
degradation material, and the
formaldehyde degradation material added into the board core of the outer
plasterboard may be an
.. amino compound.
In one embodiment of the present application, when the formaldehyde
degradation material
in the outer plasterboard is added into the board core of the outer
plasterboard, the amount of the
added formaldehyde degradation material may account for 0.5% to 3% of, further
optionally 2%
to 3% of the weight of gypsum used for preparing the outer plasterboard.
Optionally, the visible-light formaldehyde degradation material is a modified
TiO2
photocatalytic material.
Optionally, the amino compound is selected from one or more of ammonium
acetate, urea-
formaldehyde resin and urea.
In one embodiment of the present application, a formaldehyde degradation
material may be
added into the board core of the inner plasterboard.
Optionally, the amount of formaldehyde degradation material added into the
board core of
the inner plasterboard accounts for 0.5% to 3% of, further optionally 2% to 3%
of the weight of
gypsum used for preparing the inner plasterboard.
Optionally, the formaldehyde degradation material in the board core of the
inner
.. plasterboard is an amino compound, and optionally, the amino compound is
selected from one or
more of ammonium acetate, urea-formaldehyde resin and urea.
In the embodiment of the present application, a formaldehyde degradation
material may be
added into the board core of the thermal insulation layer.
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Optionally, the amount of formaldehyde degradation material added into the
board core of
the thermal insulation layer accounts for 2% to 3% of the weight of the
thermal insulation layer.
Optionally, the formaldehyde degradation material in the board core of the
thermal
insulation layer is an amino compound, and optionally, the amino compound is
selected from one
or more of ammonium acetate, urea-formaldehyde resin and urea. In one
embodiment of the
present application, the partition wall system having an air purification
function may further
include an ultraviolet lamp, the ultraviolet lamp being disposed on the top of
the cavity.
In one embodiment of the present application, the formaldehyde degradation
material in the
outer plasterboard may be sprayed on the surface of the outer plasterboard
and/or added into the
board core of the outer plasterboard, the formaldehyde degradation material
sprayed on the
surface of the outer plasterboard may be an ultraviolet-light formaldehyde
degradation material,
or a mixture of a visible-light formaldehyde degradation material and an
ultraviolet-light
formaldehyde degradation material, and the formaldehyde degradation material
added into the
board core of the outer plasterboard may be an amino compound.
Optionally, the visible-light formaldehyde degradation material is a modified
TiO2
photocatalytic material.
Optionally, the ultraviolet-light formaldehyde degradation material is a
TiO2photocatalytic
material.
Optionally, the amino compound is selected from one or more of ammonium
acetate, urea-
.. formaldehyde resin and urea.
In one embodiment of the present application, the surface of the inner
plasterboard may be
sprayed with a formaldehyde degradation material, the formaldehyde degradation
may be an
ultraviolet-light formaldehyde degradation material, and the thermal
insulation layer has a porous
structure to allow ultraviolet light to pass through the thermal insulation
layer.
Optionally, the formaldehyde degradation material may be added into the board
core of the
inner plasterboard, and the surface of the inner plasterboard may be sprayed
with the
formaldehyde degradation material, the formaldehyde degradation material added
into the board
core of the inner plasterboard may be an amino compound, the formaldehyde
degradation
material sprayed on the surface of the inner plasterboard may be an
ultraviolet-light formaldehyde
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degradation material, and the thermal insulation layer has a porous structure
to allow ultraviolet
light to pass through the thermal insulation layer.
Optionally, the ultraviolet-light formaldehyde degradation material is a TiO2
photocatalytic
material, the amino compound may be selected from one or more of ammonium
acetate, urea-
formaldehyde resin and urea, and the thermal insulation layer is rock wool or
glass wool.
In one embodiment of the present application, the surface of the thermal
insulation layer
may be sprayed with a formaldehyde degradation material, which may be an
ultraviolet-light
formaldehyde degradation material.
Optionally, the formaldehyde degradation material may be added into the board
core of the
thermal insulation layer, and the surface of the thermal insulation layer may
be sprayed with a
formaldehyde degradation material. The formaldehyde degradation material added
into the board
core of the thermal insulation layer may be an amino compound, and the
formaldehyde
degradation material sprayed on the surface of the thermal insulation layer
may be an ultraviolet-
light formaldehyde degradation material.
Optionally, the ultraviolet-light formaldehyde degradation material is a TiO2
photocatalytic
material, and the amino compound is selected from one or more of ammonium
acetate, urea-
formaldehyde resin and urea.
In one embodiment of the present application, the inner plasterboard, or the
outer
plasterboard, or both of the inner plasterboard and the outer plasterboard may
be phase-change
plasterboard.
In one embodiment of the present application, the outer plasterboard may also
contain a
formaldehyde adsorption material.
In one embodiment of the present application, the formaldehyde adsorption
material may
be selected from one or more of diatomite, sepiolite, active silicon and
active aluminum.
In one embodiment of the present application, the weight of the formaldehyde
adsorption
material does not exceed 10% of the weight of calcined gypsum that is a raw
material used for
preparing the outer plasterboard.
In one embodiment of the present application, the partition wall system having
an air
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purification function may further include a formaldehyde content monitoring
device, the
formaldehyde content monitoring device being configured to monitor the
formaldehyde content
in the partition wall system in real time and to raise an alarm when the
monitored formaldehyde
content exceeds a set value. After people hear the alarm, the air volume of
the fresh air system of
the house may be increased, thus accelerating the photocatalytic rate by the
ultraviolet light within
the body of the partition wall system.
In one embodiment of the present application, the partition wall system may be
integral
with furniture of a house. The furniture may have no rear wall, or top wall,
or neither rear wall or
top wall, and be in fluid communication with the outer plasterboard of the
partition wall system
through the one-way breather membrane.
The present application also provides a method for purifying air, and the
method includes
using the partition wall system having an air purification function as
described above.
Due to the addition of the formaldehyde degradation material into the outer
plasterboard,
the partition wall system of the present application has the function of
degrading formaldehyde,
and other performances of the partition wall system are not affected, thus
complying with national
standards. When the outer plasterboard contains a formaldehyde adsorption
material, harmful
gases such as formaldehyde which are not degraded by the formaldehyde
degradation material
are adsorbed and enter the cavity between the outer plasterboard and the
thermal insulation layer
through the one-way breather membrane. As the cavity is in fluid communication
with the air
vent of the house, harmful gases such as formaldehyde are discharged from the
room, so that the
outer plasterboard may continuously adsorb harmful gases such as formaldehyde
in the air.
The heat released by the ultraviolet lamp in the partition wall system having
an air
purification function of the present application may be stored by the phase-
change plasterboard,
and the energy is released during night or when indoor temperature is low,
thus achieving a
purpose of adjusting the indoor temperature. The ultraviolet lamp is disposed
on the top of the
cavity. As the keel on the top of the cavity is provided with a hole and the
size of the hole is
smaller than the size of the cavity, the flow channel of formaldehyde-
containing air is narrowed
when passing through the hole, resulting in increased retention time,
prolonged reaction time, and
thus improved formaldehyde purification rate.
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Further features and advantages of the present application will be set forth
in the description
which follows, and in part will be apparent from the specification, or may be
appreciated through
the practice of the application. The objects and other advantages of the
present application may
be realized and achieved by the structures particularly set forth in the
specification, claims and
drawings.
Brief Description of Drawings
The accompanying drawings are used to provide a further understanding of the
technical
scheme of the present application and constitute a part of the specification.
The accompanying
drawings together with the embodiments of the application, are used to explain
the technical
scheme of the present application and do not constitute a limitation on the
technical scheme of
the present application.
FIG. 1 is a schematic diagram of a structure of a partition wall system having
an air
purification function according to Example 1 of the present application.
Detailed Description
In order to make the objects, technical scheme and advantages of this
application become
more apparent, Examples of the present application will be described in detail
below with
reference to the accompanying drawings. It should be noted that the Examples
in the present
application as well as features in the Examples may be in any combination with
each other
without conflict.
The TiO2 that degrades formaldehyde under ultraviolet light and the modified
TiO2 that
degrades formaldehyde under visible light used in the following Examples are
both common
commercial products, and the commercial products with a 24-hour formaldehyde
purification rate
of more than 90% may be used. Other raw materials and reagents, unless
otherwise specified, are
common commercial products.
Example 1
As shown in FIG. 1, the partition wall system having an air purification
function of this
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Exa'mple includes an inner plasterboard 1, a keel 2, a thermal insulation
layer 3, a cavity 4, an
ultraviolet lamp 5, a one-way breather membrane 6, and an outer plasterboard
7.
The one-way breather membrane 6 is disposed between the thermal insulation
layer 3 and
the outer plasterboard 7. The cavity 4 is disposed between the thermal
insulation layer 3 and the
one-way breather membrane 6 and is in fluid communication with an air vent of
a fresh air system
of a house. The ultraviolet lamp 5 is disposed on the top of the cavity 4.
The outer surface of the outer plasterboard 7 is sprayed with TiO2 with an
effective amount
of 2g/m2 that may degrade formaldehyde under ultraviolet light, and the board
core of the outer
plasterboard 7 contains 10% diatomite (based on the weight of calcined gypsum
used for
preparing the outer plasterboard).
The surface of the thermal insulation layer 3 close to the cavity is sprayed
with TiO2 with
an effective amount of 2g/m2, which may degrade formaldehyde under ultraviolet
light.
Indoor furniture (e.g. wardrobe) has no rear wall and is integral with the
partition wall
system. A one-way breather membrane 6 is disposed between the furniture and
the outer
plasterboard 7 of the partition wall system, so that harmful gases such as
formaldehyde emitted
from interior of the wardrobe may be continuously absorbed by the outer
plasterboard 7 under
the action of negative pressure, enter the cavity 4, and then be discharged
from the room though
the air vent of the fresh air system to improve the indoor environment.
The partition wall system having an air purification function of this Example
further
includes a formaldehyde content monitoring device (commercially available),
which is
configured to monitor the formaldehyde content in the partition wall system in
real time and to
raise an alarm when the monitored formaldehyde content exceeds a set value.
After people hear
the alarm, the air volume of the fresh air system of the house may be
increased, thus accelerating
the photocatalytic rate by the ultraviolet light within the body of the
partition wall system.
Example 2
This Example differs from the Example I only in that the partition wall system
does not
include a cavity, an ultraviolet lamp and a one-way breather membrane.
Example 3
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This Example differs from the Example 1 only in that the board core of the
outer
plasterboard contains only ammonium acetate (no diatomite as a formaldehyde
adsorption
material), the amount of the added ammonium acetate accounts for 2% of the
weight of gypsum
used for preparing the outer plasterboard, and there is no formaldehyde
degradation material on
the outer surface of the outer plasterboard and the outer surface of the
thermal insulation layer.
Example 4
This Example differs from the Example 1 only in that the formaldehyde
degradation
material sprayed on the outer surface of the outer plasterboard is only
modified TiO2 with an
effective amount of 2g/m2 that may degrade formaldehyde under visible light,
and there is no
.. formaldehyde degradation material or formaldehyde adsorption material on
the board core of the
outer plasterboard and the outer surface of the thermal insulation layer.
Moreover, the partition
wall system of this Example is not integral with indoor furniture.
Example 5
This Example differs from the Example 1 only in that additionally, ammonium
acetate as a
formaldehyde degradation material is added into the board core of the inner
plasterboard and the
board core of the outer plasterboard, and the amount of the added ammonium
acetate accounts
for 0.5% of the weight of gypsum used for preparing the inner plasterboard and
the outer
plasterboard.
The effects of formaldehyde purification of the partition wall systems of the
Examples 1-5
are shown in the following table:
NO. 24-hour formaldehyde purification
rate
Example 1 96.3%
Example 2 77.0%
Example 3 93.6%
Example 4 90.3%
Example 5 96.8%
Although the embodiments disclosed in the present application have been
described above,
the contents are only about the embodiments adopted for the convenience of
understanding the
present application and are not intended to limit the present application. Any
of those skilled in
the art to which the present application belongs may make any modifications
and variations on
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the form and details of implementation of the present application without
departing from the spirit
and scope disclosed in the present application, but the scope of what is
claimed by the present
application shall still be subject to the scope defined in the appended
claims.
Industrial Applicability
The partition wall system having an air purification function and the method
for purifying
air of the present application are capable of degrading formaldehyde, thus
effectively purifying
indoor air.
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