CN215832253U

CN215832253U - Air purification assembly and refrigerator

Info

Publication number: CN215832253U
Application number: CN202121090626.8U
Authority: CN
Inventors: 陆啸天; 伍志刚; 姚君; 王喆
Original assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Current assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2022-02-15
Anticipated expiration: 2031-05-20

Abstract

The utility model relates to the field of refrigeration equipment, and provides an air purification assembly and a refrigerator, wherein the air purification assembly comprises a shell, a light source generation device, a photocatalyst block and a fan, wherein a blocking plate is arranged in the shell, the blocking plate divides the interior of the shell into a first cavity and a second cavity, the first cavity is communicated with an air outlet arranged in the shell, the second cavity is communicated with an air inlet arranged in the shell, and the first cavity is communicated with the second cavity through a vent hole; the photocatalyst block is arranged in the second cavity, and the light source generating device is arranged corresponding to the photocatalyst block. The inside partition of casing is first cavity and second cavity through the baffler, and fan drive air flows into the second cavity through the air intake, and under the guide effect of baffler, the air fully contacts and reacts with photocatalyst piece in the second cavity, carries out circulating sterilization and removes the peculiar smell, has the advantage that the efficiency of disinfecting is high. Meanwhile, the air purifier does not contain a filtering component, so that the service life of the air purifying component is prolonged.

Description

Air purification assembly and refrigerator

Technical Field

The utility model relates to the field of refrigeration equipment, in particular to an air purification assembly and a refrigerator.

Background

The refrigerator is an area for storing food materials, some psychrophilic microorganisms such as listeria can still grow and reproduce relatively quickly at low temperature, so that food safety problems are caused, symptoms such as fever, diarrhea and even encephalitis are caused, and the health of people is seriously harmed. In addition, the odor molecules of the food materials can gradually volatilize into a relatively sealed cavity of the refrigerator in the storage process, so that various peculiar smells are mixed, and the use feeling is seriously influenced. Therefore, it is necessary to kill bacteria and remove odor molecules in the refrigerator.

The existing photocatalyst sterilization adopts an ultraviolet lamp to trigger a catalyst and combines an active carbon filtering technology, the ultraviolet lamp comprises a mercury lamp and an LED ultraviolet lamp, and the mercury lamp contains toxic and harmful substance mercury and is unsafe; the LED ultraviolet lamp is expensive, the photoelectric conversion rate is low, and the heat production is large. In addition, the active carbon filter material adsorbs peculiar smell, bacteria and dust in the air for a long time, the service life of the active carbon filter material is difficult to guarantee, and the active carbon filter material can become a pollution source after saturated adsorption.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the air purification assembly provided by the utility model has the advantages that the blocking plate is arranged in the shell, the blocking plate divides the interior of the shell into the first cavity and the second cavity, and the fan can be in full contact with and react with the photocatalyst block when driving air to flow through the second cavity, so that cyclic sterilization and odor removal are carried out, and the air purification assembly is long in service life and high in sterilization efficiency.

The utility model further provides the refrigerator.

An air purification assembly according to an embodiment of the first aspect of the present invention includes:

the air conditioner comprises a shell, wherein a blocking plate is arranged in the shell and divides the interior of the shell into a first cavity and a second cavity, the first cavity is communicated with an air outlet arranged in the shell, the second cavity is communicated with an air inlet arranged in the shell, and the first cavity is communicated with the second cavity through a vent hole;

the photocatalyst block is arranged in the second cavity;

the light source generating device is arranged corresponding to the photocatalyst block;

and the fan is arranged in the first cavity and is suitable for driving air to flow into the second cavity through the air inlet to contact and react with the photocatalyst block and then flow out through the air outlet.

According to the air purification assembly provided by the embodiment of the utility model, the blocking plate is arranged in the shell, the blocking plate divides the interior of the shell into the first cavity and the second cavity, the fan drives air to flow into the second cavity through the air inlet, and under the guiding action of the blocking plate, the air is in full contact with and reacts with the photocatalyst block in the second cavity, so that circulating sterilization and odor removal are carried out, and the air purification assembly has the advantage of high sterilization efficiency. Meanwhile, the air purifier does not contain a filtering component, so that the service life of the air purifying component is prolonged.

According to one embodiment of the utility model, the housing comprises:

the air outlet is arranged on the first shell;

the second shell comprises a bottom plate and a side wall surrounding the edge of the bottom plate, the air inlet is formed in the side wall, a mounting opening is formed in one side, far away from the bottom plate, of the side wall in a surrounding mode, and the first shell covers the mounting opening.

According to an embodiment of the present invention, the air inlet is disposed at an edge of one side of the side wall, which is far away from the bottom plate, the air vent is disposed at an edge of one side of the blocking plate, which is close to the bottom plate, the air inlet is located at one side of the photocatalyst block, and the air vent is located at the other side of the photocatalyst block.

According to an embodiment of the utility model, the blocking plate is arranged in the second shell, the second cavity is L-shaped, the light source generating device is arranged in the second cavity, and the shape of the light source generating device and the shape of the photocatalyst block are both matched with the shape of the second cavity.

According to one embodiment of the present invention, a sealing member is disposed between each of the photocatalyst block and the barrier plate and the sidewall.

According to one embodiment of the utility model, the photocatalyst block is located on the side of the light source generating device facing away from the base plate.

According to one embodiment of the utility model, the light source wavelength of the light source generating device is 253nm-600 nm.

According to one embodiment of the utility model, the photocatalyst block comprises a carrier, and the surface of the carrier is provided with nano titanium dioxide.

According to one embodiment of the utility model, a plurality of through holes are arranged on the carrier at intervals.

The refrigerator according to the second aspect of the embodiment of the utility model comprises a refrigerator body and further comprises the air purification assembly as described in any one of the above items, wherein the air purification assembly is arranged in the chamber of the refrigerator body.

One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

Furthermore, according to the refrigerator provided by the embodiment of the utility model, the air purification assembly is arranged in the chamber of the refrigerator body, so that the sanitation safety and the food material safety of the refrigerator can be effectively guaranteed.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an exploded view of an air purification assembly according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a photocatalyst block provided in an embodiment of the present invention.

Reference numerals:

100. a barrier plate; 200. a first cavity; 210. a second cavity; 220. a first housing; 230. a second housing; 231. a base plate; 232. a side wall; 240. an air inlet; 250. an air outlet; 300. a light source generating device; 400. a fan; 500. a photocatalyst block.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In embodiments of the utility model, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The existing sterilization technology can be divided into a heat sterilization technology and a cold sterilization technology, and the heat sterilization technology is not suitable for many scenes due to high temperature and high energy consumption required by the heat sterilization technology. The cold sterilization technology widely applied at present mainly comprises a plasma technology, an ozone technology, an ultraviolet sterilization technology, an irradiation technology, an ultrasonic technology, an ultrahigh-pressure sterilization technology and a high-voltage pulse electric field technology. Wherein, the plasma technology, the ozone technology, the ultraviolet sterilization technology and the irradiation technology can generate harmful substances such as ozone, radiation and the like, and the leakage of ultraviolet rays can threaten the health of human bodies; the ultrasonic technology needs a liquid medium for conduction, is not suitable for non-contact sterilization, and has limited application scenes. The ultra-high voltage sterilization technology and the high-voltage pulse electric field technology have high requirements on equipment and are expensive. The existing peculiar smell removing technology mainly comprises a plasma technology and an adsorption technology, and the plasma technology has high peculiar smell removing efficiency and good effect; the adsorption technology is limited by adsorption materials, the effective service time is short, and the adsorption technology needs to be replaced frequently. Therefore, the air purification assembly provided by the embodiment of the utility model adopts a photocatalyst sterilization technology, has the advantages of good sterilization effect, easiness in realization, low price and the like compared with the existing sterilization and odor removal technology, is suitable for various scenes, and is particularly suitable for sterilizing and removing odor of the refrigerator chamber.

Fig. 1 illustrates an explosion structure diagram of an air purification assembly according to an embodiment of the present invention, and as shown in fig. 1, the air purification assembly includes a housing, a light source generation device 300, a photocatalyst block 500, and a blower 400, a blocking plate 100 is disposed in the housing, the blocking plate 100 divides the interior of the housing into a first cavity 200 and a second cavity 210, the first cavity 200 is communicated with an air outlet 250 disposed in the housing, the second cavity 210 is communicated with an air inlet 240 disposed in the housing, and the first cavity 200 is communicated with the second cavity 210 through a vent hole. The light source generating device 300 is disposed corresponding to the photocatalyst block 500, the photocatalyst block 500 is also disposed in the second cavity 210, and the photocatalyst block 500 is suitable for killing bacteria and degrading odor molecules under the irradiation of the light source generating device 300. The blower 400 is disposed in the first cavity 200, and is adapted to drive air to flow into the second cavity 210 through the air inlet 240 to contact and react with the photocatalyst block 500, and then flow out through the air outlet 250.

According to the air purification assembly provided by the embodiment of the utility model, the blocking plate 100 is arranged in the shell, the blocking plate 100 divides the interior of the shell into the first cavity 200 and the second cavity 210, the fan 400 drives air to flow into the second cavity 210 through the air inlet 240, and under the guiding action of the blocking plate 100, the air is in full contact and reaction with the photocatalyst block 500 in the second cavity 210, so that cyclic sterilization and odor removal are carried out, and the air purification assembly has the advantage of high sterilization efficiency. Meanwhile, the air purifier does not contain a filtering component, so that the service life of the air purifying component is prolonged.

According to an embodiment of the present invention, the housing includes a first housing 220 and a second housing 230, the first housing 220 is provided with an air outlet 250, the second housing 230 includes a bottom plate 231 and a side wall 232 surrounding the edge of the bottom plate 231, the air inlet 240 is provided in the side wall 232, a mounting opening is defined by a side of the side wall 232 away from the bottom plate 231, and the first housing 220 covers the mounting opening.

It should be noted here that the first housing 220 and the second housing 230 are detachably connected, specifically, the first housing 220 and the second housing 230 are connected by a screw or a fastener, and the first housing 220 and the second housing 230 are detachably connected, so as to facilitate the installation and the removal of the light source generating device 300, the photocatalyst block 500, and the blower 400. Of course, the detachable manner of the first housing 220 and the second housing 230 is not limited to this, and the connection may be made by other manners. The first housing 220 is used for sealing the mounting opening, and the shape of the first housing 220 is matched with the shape of the mounting opening. When the first housing 220 covers the mounting opening, the first housing 220 abuts against the blocking plate 100, so that the air in the second cavity 210 cannot flow into the first cavity 200 through the space between the first housing 220 and the blocking plate 100.

According to the embodiment of the utility model, the air inlet 240 is disposed at the edge of the side wall 232 away from the bottom plate 231, the air vent is disposed at the edge of the side of the barrier plate 100 close to the bottom plate 231, the air inlet 240 is disposed at one side of the photocatalyst block 500, and the air vent is disposed at the other side of the photocatalyst block 500. The advantage of disposing the air inlets 240 and the air vents on both sides of the photocatalyst block 500 is that after air enters the second cavity 210 defined by the blocking plate 100 and the sidewall 232 through the air inlets 240, the air can only pass through the photocatalyst block 500 due to the blocking of the blocking plate 100, and in the process of passing through the photocatalyst block 500, the air fully contacts and reacts with the photocatalyst block 500, then flows into the first cavity 200 through the air vents, and finally flows out of the housing through the air outlets 250. Compared with an air purification assembly without the barrier plate 100, the air purification assembly of the utility model has higher sterilization efficiency and smaller backflow. After the air purification component is installed in the chamber of the refrigerator body, under the action of the fan 400, air in the air purification component and air in the chamber circulate, so that circulating sterilization and peculiar smell removal are realized, and the sterilization and peculiar smell removal effects are better.

It should be noted that the air inlet 240 is a strip-shaped through hole and is disposed at the side wall 232 at intervals, and of course, the arrangement manner of the air inlet 240 is not limited thereto, and a plurality of strip-shaped through holes may also be connected into a whole. Similarly, the position of the ventilation hole is not limited to the edge of the blocking plate 100 on the side close to the bottom plate 231, and a ventilation groove may be provided in the bottom plate 231 instead of the ventilation hole.

According to the embodiment of the utility model, the blocking plate 100 is arranged in the second housing 230, the second cavity 210 is L-shaped, the light source generating device 300 is arranged in the second cavity 210, and the shape of the light source generating device 300 and the shape of the photocatalyst block 500 are both matched with the shape of the second cavity 210. The blocking plate 100 is disposed in the second housing 230, the blocking plate 100 and the second housing 230 are integrally formed, and the blocking plate 100 can provide a guiding function for the air, block other circulation channels of the air, and only completely pass through the photocatalyst block 500. First cavity 200 is the cuboid, and second cavity 210 is the L type, and second cavity 210 partly is located one side of first cavity 200, and another part is located the one end of first cavity 200, and first cavity 200 and second cavity 210 constitute a cuboid jointly, and such arrangement improves space utilization, reduces the thickness of air purification subassembly, reduces the space that the air purification subassembly occupy. It should be noted that the second cavity 210 is L-shaped, which means that the cross section of the second cavity 210 is L-shaped.

According to the embodiment of the present invention, a sealing member is disposed between the photocatalyst block 500 and the barrier plate 100 and the sidewall 232, respectively. The gap is sealed by a sealing member, so that part of air can be prevented from flowing through the gap and bypassing the contact and reaction with the photocatalyst block 500, and the sterilization efficiency can be further improved. It should be noted that the sealing member is a sponge pad, a rubber pad or other flexible member, and the sealing member can seal the gap between the photocatalyst block 500 and the barrier plate 100 and the gap between the photocatalyst block 500 and the sidewall 232.

According to the embodiment of the present invention, the photocatalyst block 500 is located on a side of the light source generating device 300 away from the bottom plate 231, an illumination area is formed between the photocatalyst block 500 and the light source generating device 300, a reaction area is formed near the photocatalyst block 500, and the second cavity 210 where the fan 400 is installed becomes a fan area. After entering the second cavity 210 through the air inlet 240, the air firstly enters the reaction area for reaction, then enters the fan area through the illumination area, and finally flows out of the housing through the air outlet 250.

According to the embodiment of the present invention, the light source wavelength of the light source generating device 300 is 253nm to 600nm, but the light source wavelength of the light source generating device 300 is not limited thereto, and an appropriate region is selected according to actual needs. The light source of the light source generating device 300 can excite the photocatalyst block 500 to generate electron hole pairs, the electron hole pairs have strong ability of competing for electrons, and bacteria and odor molecules in the air are oxidized with the electron hole pairs when reaching the surface of the photocatalyst, so that the bacteria die, the odor molecules are degraded, and finally, harmful substances such as carbon dioxide, water and the like are generated. Oxygen and water in the air are deprived of electrons by electron hole pairs to generate ROS-reactive substances such as hydroxyl radicals and oxygen radicals. The ROS-active species not only react with bacteria and odor molecules in the air, but also are blown into the entire refrigerator compartment by the blower 400, react with bacteria on the surface of food materials in the refrigerator, and bacteria on the surfaces of shelves and inner walls, thereby killing the bacteria.

According to an embodiment of the present invention, fig. 2 illustrates a schematic three-dimensional structure diagram of a photocatalyst block provided by an embodiment of the present invention, as shown in fig. 2, the photocatalyst block 500 includes a carrier, the carrier is L-shaped, and the surface of the carrier is provided with nano titanium dioxide. The carrier is made of metal materials such as aluminum, stainless steel or nickel. The nano titanium dioxide and the water-soluble gel material are attached to the surface of the carrier, the water-soluble gel material enables the nano titanium dioxide to be fully exposed, the particle size of the nano titanium dioxide is 10-50nm to enhance the light absorption capacity, and the content of the nano titanium dioxide is 13-20%. Here, it should be noted that the carrier is used for supporting the nano titania, and the structure of the carrier is not limited to a plate-like structure, and a metal mesh may be used instead.

According to the embodiment of the utility model, the carrier is provided with the plurality of through holes at intervals, the carrier is made into a porous metal structure by the through holes, the porous metal structure can fully expose the nano titanium dioxide, the contact surface with air is increased, the air is fully contacted and reacted with the nano titanium dioxide, and the reaction efficiency is further improved.

According to the embodiment of the utility model, the light source generating device 300 comprises an L-shaped LED lamp panel, and LED lamp beads with light source wavelength of 450nm are arranged on one side of the LED lamp panel facing the photocatalyst block 500.

According to an embodiment of the present invention, as shown in fig. 1, the bacteria odor removing device includes a housing, a light source generating device 300, a photocatalyst block 500 and a blower 400, the housing includes a first housing 220 and a second housing 230, the first housing 220 is provided with an air outlet 250, the second housing 230 includes a bottom plate 231 and a side wall 232 surrounding the edge of the bottom plate 231, an air inlet 240 is provided in the side wall 232, a mounting opening is defined by one side of the side wall 232 away from the bottom plate 231, and the first housing 220 covers the mounting opening. The blocking plate 100 is disposed in the second housing 230, the blocking plate 100 divides the interior of the housing into a first cavity 200 and a second cavity 210, the first cavity 200 is communicated with the air outlet 250, the second cavity 210 is L-shaped, and the shape of the light source generating device 300 and the shape of the photocatalyst block 500 are both adapted to the shape of the second cavity 210. The air inlet 240 is disposed on the edge of the side wall 232 away from the bottom plate 231, the air hole is disposed on the edge of the blocking plate 100 near the bottom plate 231, the air inlet 240 is disposed on one side of the photocatalyst block 500, and the air hole is disposed on the other side of the photocatalyst block 500.

The light source generating device 300 is disposed in the second cavity 210, the photocatalyst block 500 is disposed in the second cavity 210, and the photocatalyst block 500 is located on a side of the light source generating device 300 away from the bottom plate 231. The photocatalyst block 500 is provided with sealing members respectively with between the barrier plate 100 and the side wall 232, the light source generating device 300 comprises an LED lamp panel, the LED lamp panel is L-shaped, and one side of the LED lamp panel facing the photocatalyst block 500 is provided with an LED lamp bead with a light source wavelength of 450 nm. The photocatalyst block 500 includes a carrier, and the surface of the carrier is provided with nano titanium dioxide. The carrier is made of aluminum, the nano titanium dioxide and the water-soluble gel material are attached to the surface of the carrier, the particle size of the nano titanium dioxide is 20nm, and the content of the nano titanium dioxide is 13-20%. The carrier is L type, and the interval is provided with a plurality of through-holes on the carrier, sets up the through-hole and makes the carrier become porous type metallic structure.

The utility model also provides a refrigerator, which comprises a refrigerator body and the air purification assembly in any one of the embodiments, wherein the air purification assembly is arranged in the chamber of the refrigerator body.

According to the refrigerator provided by the embodiment of the utility model, the air purification assembly is arranged in the chamber of the refrigerator body, so that the sanitation safety and food material safety of the refrigerator can be effectively guaranteed.

The air purification assembly is arranged in the chamber of the refrigerator body, when the fan 400 rotates, air in the refrigerator chamber enters the second cavity 210 limited by the barrier plate 100 and the side wall 232 through the air inlet 240 under the driving of the fan 400, negative pressure is generated between the fan 400 and the bottom plate 231 due to the blocking of the barrier plate 100, the air can only pass through the photocatalyst block 500 under the flow guiding effect and the negative pressure effect of the barrier plate 100, and in the process that the air passes through the photocatalyst block 500, the air is in full contact with and reacts with the photocatalyst block 500, so that germs carried by the air are killed, and peculiar smell molecules carried by the air are degraded. In addition, water molecules and oxygen molecules in the air also react with electron-hole pairs on the surface of the photocatalyst block 500 to generate ROS species. After passing through the photocatalyst block 500, the air rich in ROS species reaches between the light source generating device 300 and the photocatalyst block 500, and the light source generating device 300 further sterilizes the air. Under the negative pressure, the air rich in ROS species flows from the ventilation holes of the barrier plate 100 into the first cavity 200 and finally out of the housing through the air outlet 250. Under the push of inertia and rear air, the air rich in ROS substances is diffused into the refrigerator chamber to kill germs on the refrigerator shelf and the surface of food materials, and the sanitation and safety of the refrigerator and the food materials are guaranteed.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the utility model. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.

Claims

1. An air purification assembly, comprising:

the photocatalyst block is arranged in the second cavity;

2. The air purification assembly of claim 1, wherein the housing comprises:

the air outlet is arranged on the first shell;

3. The air purification assembly as claimed in claim 2, wherein the air inlet is disposed at an edge of the side wall away from the bottom plate, the air vent is disposed at an edge of the blocking plate close to one side of the bottom plate, the air inlet is disposed at one side of the photocatalyst block, and the air vent is disposed at the other side of the photocatalyst block.

4. The air purification assembly as claimed in claim 2 or 3, wherein the blocking plate is disposed in the second housing, the second cavity is L-shaped, the light source generation device is disposed in the second cavity, and the shape of the light source generation device and the shape of the photocatalyst block are both adapted to the shape of the second cavity.

5. The air purification assembly as claimed in claim 4, wherein a seal is disposed between the photocatalyst block and each of the baffle plate and the side wall.

6. An air cleaning assembly according to claim 2 or 3, wherein the photocatalyst block is located on a side of the light source generating device facing away from the base plate.

7. The air cleaning assembly according to any one of claims 1 to 3, wherein the light source wavelength of the light source generating device is 253nm-600 nm.

8. The air purification assembly according to any one of claims 1 to 3, wherein the photocatalyst block comprises a carrier, and the surface of the carrier is provided with nano titanium dioxide.

9. The air purification assembly of claim 8, wherein the carrier has a plurality of through holes spaced apart thereon.

10. A refrigerator comprising a refrigerator body, characterized by further comprising an air cleaning assembly of any one of claims 1 to 9, the air cleaning assembly being disposed in a compartment of the refrigerator body.