Air pressure balancing device and refrigerator

Abstract

The utility model discloses an air pressure balancing device and a refrigerator. The air pressure balancing device comprises a shell assembly and a pressure relief assembly. The shell assembly is provided with a first channel. The pressure relief assembly is provided with a second channel. At least part of the pressure relief assembly is arranged in the first channel. The pressure relief assembly comprises a fixed part and a movable part. The fixing piece is fixedly connected to the inner wall of the first channel. The movable part is movably arranged on the fixed part and has an open state and a closed state. When the movable part is in the open state, the first channel is communicated with the second channel. When the movable part is in the closed state, the first channel and the second channel are disconnected. The air pressure balancing device can relieve pressure according to user requirements so as to guarantee pressure balance inside and outside the refrigerator, and cold loss of the refrigerator when pressure relief is not needed is avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of household appliances, and in particular to an air pressure balancing device and a refrigerator. Background Art

[0002] As people's living standards continue to improve, refrigerators have become a necessity in people's lives. A refrigerator can use refrigeration to keep its interior at a low temperature to preserve food. However, during the use of the refrigerator, there will be a negative pressure phenomenon inside the refrigerator, which means that the user needs to overcome the negative pressure to open the refrigerator.

[0003] In the related art, a pressure relief device is usually installed in a refrigerator to balance the pressure inside and outside the refrigerator so that users can open the refrigerator. However, most pressure relief devices balance the pressure inside and outside the refrigerator in real time, which will cause the refrigerator to lose cooling capacity. Utility Model Content

[0004] In view of this, the present disclosure provides an air pressure balancing device and a refrigerator. The air pressure balancing device can release pressure according to user needs to ensure pressure balance inside and outside the refrigerator, and avoid cooling loss of the refrigerator when pressure release is not required.

[0005] Specifically, the present disclosure is implemented through the following technical solutions.

[0006] According to a first aspect of an embodiment of the present disclosure, there is provided a gas pressure balancing device, comprising a shell assembly and a pressure relief assembly. The shell assembly is provided with a first channel. The pressure relief assembly is provided with a second channel. At least part of the pressure relief assembly is arranged in the first channel. The pressure relief assembly comprises a fixed part and a movable part. The fixed part is fixedly connected to the inner wall of the first channel. The movable part is movably arranged on the fixed part and has an open state and a closed state. Wherein, when the movable part is in the open state, the first channel is connected to the second channel. When the movable part is in the closed state, the first channel is disconnected from the second channel.

[0007] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects.

[0008] Taking the application of the air pressure balancing device in a refrigerator as an example, when the refrigerator needs to release pressure, the movable part moves relative to the fixed part and is in an open state. The first channel and the second channel are connected, so that the external gas enters the first channel through the second channel and enters the interior of the refrigerator, thereby balancing the air pressure inside and outside the refrigerator, making it easier for the user to open the refrigerator. When the refrigerator does not need to be opened, that is, when the refrigerator does not need to be depressurized, the movable part is in a closed state to disconnect the first channel and the second channel, thereby preventing the cold air of the refrigerator from being lost to the outside through the first channel and the second channel, avoiding the loss of cold air in the refrigerator when pressure relief is not required, and saving energy.

[0009] The technical solution of the present disclosure is further described below.

[0010] In one embodiment, the movable member is slidably connected to the fixed member. Alternatively, the movable member is rotatably connected to the fixed member.

[0011] In one embodiment, the movable member is slidably connected to the fixed member. The movable member is provided with a sealing portion, and the fixed member is provided with an abutting portion. When the movable member is in a closed state, the sealing portion presses against the abutting portion to disconnect the first channel from the second channel.

[0012] In one embodiment, the sealing portion is provided with a first abutting inclined surface, and the abutting portion is provided with a second abutting inclined surface matched with the first abutting inclined surface. When the movable member is in a closed state, the first abutting inclined surface abuts against the second abutting inclined surface.

[0013] In one embodiment, the pressure relief assembly further includes a reset member, one end of which is fixedly connected to the fixed member, and the other end of which is fixedly connected to the movable member, so that the movable member can be reset to a closed state.

[0014] In one embodiment, the reset member includes a spring, which is sleeved on the movable member, one end of the spring is fixedly connected to the fixed member, and the other end of the spring is fixedly connected to the movable member.

[0015] In one embodiment, the housing assembly includes a first housing having a first gas channel and a second housing having a second gas channel. The first gas channel is connected to the second gas channel to form a first channel. The connection area of ​​the first gas channel is smaller than the connection area of ​​the second gas channel.

[0016] In one embodiment, the air pressure balancing device further includes a heating element, which is fixed to the outer wall of the first shell.

[0017] In one embodiment, the second shell is provided with an internal threaded hole, the fixing piece is provided with an external threaded structure threadedly matched with the internal threaded hole, and the fixing piece is threadedly fixed to the second shell.

[0018] According to a second aspect of an embodiment of the present disclosure, a refrigerator is provided, comprising a shell component and the air pressure balancing device in any one of the above embodiments, wherein the air pressure balancing device is arranged on the shell component.

[0019] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects.

[0020] When the refrigerator is to be opened, the pressure can be released by the pressure balancing device, so as to facilitate the opening of the refrigerator. When the refrigerator does not need to be opened, the pressure balancing device is in a closed state, so as to avoid the loss of cold in the refrigerator and save energy.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] BRIEF DESCRIPTION OF THE DRAWINGS The drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The illustrative embodiments of the present disclosure and the description thereof are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic structural diagram of a refrigerator shown in an embodiment.

[0025] Figure 2 for Figure 1 The schematic diagram of the structure of the refrigerator is shown.

[0026] Figure 3 for Figure 2 The schematic diagram of the cross-sectional structure of the refrigerator shown is taken at AA.

[0027] Figure 4 for Figure 3 A partial enlarged structural schematic diagram of the refrigerator is shown.

[0028] Figure 5 for Figure 3 A partial enlarged structural schematic diagram of the refrigerator is shown.

[0029] Figure 6 for Figure 1 The structural schematic diagram of the air pressure balancing device shown.

[0030] Description of Figure Numbers.

[0031] 10. Refrigerator; 100. Shell component; 110. Shell; 120. Inner liner; 121. Accommodating chamber; 200. Air pressure balancing device; 210. Shell assembly; 211. First channel; 212. First shell; 213. Second shell; 220. Pressure relief assembly; 221. Second channel; 222. Fixing member; 2221. Abutting portion; 223. Movable member; 2231. Sealing portion; 224. Resetting member; 230. Heating member; 201. First abutting slope; 202. Second abutting slope; 203. Spring; 204. First gas channel; 205. Second gas channel. DETAILED DESCRIPTION

[0032] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0033] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms "a", "an" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0034] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0035] As people's living standards continue to improve, refrigerators have become a necessity in people's lives. Refrigerators can use refrigeration to keep the interior at a low temperature to preserve food. At present, there are many types and brands of refrigerators, which makes consumers have many choices. How to win the favor of consumers and improve product competitiveness has become an issue that refrigerator manufacturers pay more and more attention to.

[0036] During the use of the refrigerator, there will be negative pressure inside the refrigerator, which means that the user needs to overcome the negative pressure to open the refrigerator. In the related art, a pressure relief device is usually installed in the refrigerator to balance the pressure inside and outside the refrigerator, so that the user can open the refrigerator. However, most pressure relief devices balance the pressure inside and outside the refrigerator in real time, which will cause the refrigerator to lose cooling capacity.

[0037] Based on this, the present disclosure provides an air pressure balancing device 200 and a refrigerator 10. The air pressure balancing device 200 can release pressure according to user needs to ensure pressure balance inside and outside the refrigerator 10, avoiding cooling loss of the refrigerator 10 when pressure release is not required.

[0038] In order to better understand the air pressure balancing device 200 of the present disclosure, a refrigerator 10 to which the air pressure balancing device 200 is applied is used for illustration.

[0039] like Figure 1 As shown, a refrigerator 10 is provided, including a shell component 100 and an air pressure balancing device 200 , wherein the air pressure balancing device 200 is disposed on the shell component 100 .

[0040] like Figures 1 to 3 As shown, in some embodiments, the shell component 100 includes an outer shell 110 and an inner liner 120, and the inner liner 120 is provided with a receiving cavity 121. The air pressure balance device 200 runs through the outer shell 110 and the inner liner 120, and the receiving cavity 121 of the inner liner 120 can be connected to the outside through the air pressure balance device 200. When the refrigerator 10 is required to be opened, the refrigerator 10 using the air pressure balance device 200 can be depressurized through the air pressure balance device 200, and the external gas can enter the receiving cavity 121 through the air pressure balance device 200, so that the inside and outside of the refrigerator 10 are balanced, which is convenient for the user to open the refrigerator 10. When the refrigerator 10 does not need to be opened, the air pressure balance device 200 is in a closed state to avoid the loss of cold in the refrigerator 10 and save energy.

[0041] like Figure 4 As shown, in some embodiments, the air pressure balancing device 200 includes a shell assembly 210 and a pressure relief assembly 220. The shell assembly 210 is provided with a first channel 211. The pressure relief assembly 220 is provided with a second channel 221. At least part of the pressure relief assembly 220 is arranged in the first channel 211. The pressure relief assembly 220 includes a fixing member 222 and a movable member 223. The fixing member 222 is fixedly connected to the inner wall of the first channel 211. The movable member 223 is movably arranged on the fixing member 222 and has an open state and a closed state. When the movable member 223 is in the open state, the first channel 211 is connected to the second channel 221. When the movable member 223 is in the closed state, the first channel 211 is disconnected from the second channel 221.

[0042] In this way, when the refrigerator 10 needs to be depressurized, the user presses the movable member 223 to move the movable member 223 relative to the fixed member 222 to be in an open state. The first channel 211 and the second channel 221 are connected, so that the external gas enters the first channel 211 through the second channel 221 and enters the interior of the refrigerator 10, thereby balancing the air pressure inside and outside the refrigerator 10, making it easier for the user to open the refrigerator 10. When the refrigerator 10 does not need to be opened, that is, when the refrigerator 10 does not need to be depressurized, the movable member 223 is in a closed state to disconnect the first channel 211 and the second channel 221, thereby preventing the cold air of the refrigerator 10 from being lost to the outside through the first channel 211 and the second channel 221, avoiding the cold loss of the refrigerator 10 when depressurization is not required, and saving energy.

[0043] It should be noted that there are many specific implementation methods for the housing assembly 210, including one-piece molding, separate manufacturing and then assembly, etc.

[0044] In some embodiments, the movable member 223 is rotatably connected to the fixed member 222. In this way, the movable member 223 is switched between the open state and the closed state by rotating relative to the fixed member 222, and this mode is convenient to operate.

[0045] It should be noted that there may be many specific implementations of the rotational connection between the movable member 223 and the fixed member 222 , including but not limited to shaft connection, hinge connection, etc.

[0046] like Figure 4 As shown, in some embodiments, the movable member 223 is slidably connected to the fixed member 222. In this way, the movable member 223 is switched between the open state and the closed state by sliding relative to the fixed member 222, and this mode is easy to operate.

[0047] like Figure 4 As shown, in some embodiments, the movable member 223 is provided with a sealing portion 2231, and the fixed member 222 is provided with an abutting portion 2221. When the movable member 223 is in a closed state, the sealing portion 2231 presses against the abutting portion 2221 to disconnect the first channel 211 from the second channel 221. In this way, when the refrigerator 10 does not need to be opened, that is, when the refrigerator 10 does not need to be depressurized, the movable member 223 is in a closed state, and the sealing portion 2231 presses against the abutting portion 2221 to disconnect the first channel 211 from the second channel 221. The use of the sealing portion 2231 can ensure the reliability of the disconnection of the first channel 211 and the second channel 221. Prevent the cold air in the refrigerator 10 from leaking to save energy.

[0048] In some embodiments, at least one of the sealing portion 2231 and the abutting portion 2221 is elastic, so that the sealing effect of the movable member 223 when in the closed state can be further improved.

[0049] It should be noted that there are many specific implementation methods for the material of the sealing portion 2231, including but not limited to silicone, rubber, etc.

[0050] like Figure 5 As shown, in some embodiments, the sealing portion 2231 is provided with a first abutting slope 201, and the abutting portion 2221 is provided with a second abutting slope 202 adapted to the first abutting slope 201. When the movable member 223 is in a closed state, the first abutting slope 201 abuts against the second abutting slope 202. Figure 4 As shown, by abutting each other between the first abutting slope 201 and the second abutting slope 202, the contact area between the movable part 223 and the fixed part 222 can be made larger, thereby achieving a better sealing effect, so that when the movable part 223 is in a closed state, the gases in the first channel 211 and the second channel 221 are further isolated from each other, thereby further preventing the leakage of cold air in the refrigerator 10.

[0051] During the use of the refrigerator 10, the refrigerator 10 is in a state where no pressure relief is required most of the time, so the movable member 223 needs to be in a closed state most of the time. Figure 4 As shown, in some embodiments, the pressure relief assembly 220 also includes a reset member 224, one end of the reset member 224 is fixedly connected to the fixed member 222, and the other end is fixedly connected to the movable member 223, so that the movable member 223 can be reset to a closed state. In this way, when the refrigerator 10 needs to be depressurized, the user presses the movable member 223 relative to the fixed member 222 to be in an open state, thereby depressurizing the refrigerator 10. At this time, the reset member 224 will be in a deformed state and have the force to restore its original shape. When the user cancels the force of pressing the movable member 223, under the action of the reset force of the reset member 224, the movable member 223 can be reset to a closed state to disconnect the first channel 211 and the second channel 221. When the refrigerator 10 is not depressurized, the movable member 223 can automatically reset to a closed state to prevent leakage of cold air in the refrigerator 10.

[0052] It should be noted that there are many specific implementation methods for resetting the reset member 224, including elastic reset, magnetic reset, etc.

[0053] like Figure 5 As shown, in one example, the reset member 224 includes a spring 203, the spring 203 is sleeved on the movable member 223, one end of the spring 203 is fixedly connected to the fixed member 222, and the other end is fixedly connected to the movable member 223. In this way, the use of the spring 203 can facilitate the disassembly and installation of the air pressure balancing device 200. And the production cost of the air pressure balancing device 200 can be reduced.

[0054] like Figure 4 as well as Figure 6 As shown, in some embodiments, the shell assembly 210 includes a first shell 212 provided with a first gas channel 204 and a second shell 213 provided with a second gas channel 205. The first gas channel 204 is connected to the second gas channel 205 to form a first channel 211. The connection area of ​​the first gas channel 204 is smaller than the connection area of ​​the second gas channel 205. When the air pressure balance device 200 is installed in the refrigerator 10, the first shell 212 is arranged closer to the inner liner 120 of the refrigerator 10 than the second shell 213. In this way, by utilizing the flow area of ​​the first gas channel 204 being smaller than the flow area of ​​the second gas flow channel, when the refrigerator 10 is depressurized, the cold air in the refrigerator 10 flows out of the first gas channel 204 relatively less, thereby reducing the loss of cold when the refrigerator 10 is depressurized.

[0055] Since the air pressure balance device 200 is installed in the refrigerator 10, the air pressure balance device 200 may be frosted. When the air pressure balance device 200 is frosted, it is difficult to press the movable part 223 to open the state for pressure relief, which affects the user's experience. Figure 4 As shown, in some embodiments, the air pressure balance device 200 further includes a heating element 230, which is fixed to the outer wall of the first shell 212. In this way, when the air pressure balance device 200 is frosted, the air pressure balance device 200 can be defrosted by the heating element 230, so that the user can press the movable element 223 to release the pressure of the refrigerator 10, thereby improving the user's experience. In addition, since the first shell 212 is arranged closer to the inner liner 120 relative to the second shell 213, the temperature of the first shell 212 is lower than that of the second shell 213. Therefore, fixing the heating element 230 on the outer wall of the first shell 212 is more conducive to improving the defrosting effect.

[0056] It should be noted that there may be many specific implementation methods for fixing the heating element 230 to the outer wall of the first shell 212, including but not limited to adhesive fixation, clamping fixation, etc.

[0057] It should be noted that there are many specific implementations of the heating element 230, including a heating resistor, a heating electrical component, and the like.

[0058] It should be noted that the heating element 20 can be set to automatically heat, wherein the heating element 20 is set to automatically heat after a first set time interval. The first set time can be 12h, 14h, 16h, 18h, 20h, 22h, 24h, etc.

[0059] In some embodiments, the fixing member 222 is fixedly connected to the inner wall of the first channel 211, including a detachable fixed connection and a non-detachable fixed connection.

[0060] In some embodiments, the fixing member 222 and the housing assembly 210 are integrally formed so that the fixing member 222 is fixedly connected to the inner wall of the first channel 211. This method can reduce the assembly process and improve the installation efficiency of the air pressure balancing device 200.

[0061] In some embodiments, the fixing member 222 may be fixedly connected to the inner wall of the first channel 211 by welding.

[0062] In some embodiments, the air pressure balancing device 200 further includes a welding layer (not shown), and the fixing member 222 is fixed to the inner wall of the first channel 211 by welding through the welding layer.

[0063] In some embodiments, the fixing member 222 may be fixedly connected to the inner wall of the first channel 211 by bonding.

[0064] In some embodiments, the air pressure balancing device 200 further includes an adhesive layer (not shown), and the fixing member 222 is bonded and fixed to the inner wall of the first channel 211 via the adhesive layer.

[0065] In some embodiments, the fixing member 222 is snap-connected to the inner wall of the first channel 211. This method is convenient for disassembly.

[0066] In some embodiments, the fixing member 222 may be fixedly connected to the inner wall of the first channel 211 by screwing.

[0067] like Figure 4 As shown, in some embodiments, the housing assembly 210 is provided with an internal thread hole, the fixing member 222 is provided with an external thread structure threadedly matched with the internal thread hole, and the fixing member 222 is threadedly fixed to the housing assembly 210, so that the fixing member 222 is fixedly connected to the inner wall of the first channel 211. This method is convenient for users to install and disassemble the pressure relief assembly 220, and convenient for users to clean the air pressure balance device 200.

[0068] like Figure 4 As shown, in one example, the second shell 213 is provided with an internal thread hole, the fixing member 222 is provided with an external thread structure that is screwed with the internal thread hole, and the fixing member 222 is screwed and fixed to the second shell 213. In this way, since the second shell 213 is arranged near the shell 110 of the refrigerator 10 relative to the first shell 212, the fixing member 222 and the second shell 213 assembly 210 are screwed and fixed, and the movable member 223 is movably arranged on the fixing member 222, it is convenient for the user to press the movable member 223 to relieve the pressure of the refrigerator 10, thereby improving the user's experience.

[0069] It should be noted that the above embodiments can complement each other if there is no conflict.

[0070] The components included in the "component", "device" and "equipment" disclosed in the present invention can also be flexibly combined, that is, modular production can be carried out according to actual conditions and modular assembly can be carried out as an independent module; or they can be assembled separately to form a module in the present device.

[0071] The division of the above components in the present disclosure is only one of the embodiments, for the convenience of reading, rather than limiting the scope of protection of the present disclosure. As long as the above components are included and have the same function, it should be understood that they are equivalent technical solutions of the present disclosure. In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present disclosure.

[0072] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0073] In the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0074] In the present disclosure, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0075] It should be noted that when an element is referred to as being "fixed to", "disposed on", "fixedly arranged on" or "installed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. Furthermore, when an element is considered to be "fixedly connected to" another element, the two may be fixed in a detachable connection manner or in a non-detachable connection manner, such as socketing, snap-fitting, integral molding, welding, etc., which can be achieved in traditional technologies and will not be repeated here.

[0076] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the utility model concept of the present disclosure, and these all belong to the protection scope of the present disclosure.

Claims

1. A gas pressure balancing device, characterized in that: include: A housing assembly having a first passage; as well as A pressure relief assembly is provided with a second channel; at least part of the pressure relief assembly is arranged in the first channel; the pressure relief assembly comprises a fixed part and a movable part; the fixed part is fixedly connected to the inner wall of the first channel; the movable part is movably arranged on the fixed part and has an open state and a closed state; Wherein, when the movable part is in the open state, the first channel is connected to the second channel; when the movable part is in the closed state, the first channel is disconnected from the second channel.

2. The air pressure balancing device according to claim 1, characterized in that: The movable part is slidably connected to the fixed part; or, the movable part is rotationally connected to the fixed part.

3. The air pressure balancing device according to claim 1, characterized in that: The movable part is slidably connected to the fixed part; the movable part is provided with a sealing part, and the fixed part is provided with an abutting part; when the movable part is in a closed state, the sealing part presses against the abutting part to disconnect the first channel from the second channel.

4. The air pressure balancing device according to claim 3, characterized in that: The sealing portion is provided with a first abutting inclined surface, and the abutting portion is provided with a second abutting inclined surface matched with the first abutting inclined surface; when the movable part is in a closed state, the first abutting inclined surface abuts against the second abutting inclined surface.

5. The air pressure balancing device according to claim 1, characterized in that: The pressure relief assembly further comprises a reset member, one end of which is fixedly connected to the fixed member, and the other end of which is fixedly connected to the movable member, so that the movable member can be reset to the closed state.

6. The air pressure balancing device according to claim 5, characterized in that: The reset member comprises a spring, the spring is sleeved on the movable member, one end of the spring is fixedly connected to the fixed member, and the other end of the spring is fixedly connected to the movable member.

7. The air pressure balancing device according to claim 1, characterized in that: The shell assembly includes a first shell provided with a first gas channel and a second shell provided with a second gas channel; the first gas channel is connected with the second gas channel to form the first channel; the connection area of ​​the first gas channel is smaller than the connection area of ​​the second gas channel.

8. The air pressure balancing device according to claim 7, characterized in that: The air pressure balancing device further includes a heating element, and the heating element is fixedly mounted on the outer wall of the first shell.

9. The air pressure balancing device according to claim 7, characterized in that: The second shell is provided with an internal thread hole, the fixing piece is provided with an external thread structure threadedly matched with the internal thread hole, and the fixing piece is threadedly fixed to the second shell.

10. A refrigerator, characterized in that: It comprises a shell component and the air pressure balancing device according to any one of claims 1 to 9, wherein the air pressure balancing device is arranged on the shell component.

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