Balance valve, door assembly and freezer

Abstract

This application relates to the field of freezer technology, specifically providing a balance valve, a door assembly, and a freezer. The balance valve of this application is disposed within the door assembly of the freezer. The balance valve includes a valve body and multiple switching components. A chamber is provided within the valve body. The first end of the chamber can communicate with the storage cavity of the freezer, and the second end of the chamber can communicate with the outside of the freezer. The multiple switching components are spaced apart within the chamber. When the multiple switching components are not under force, they close the chamber. Only when air enters the storage cavity from the outside of the freezer, the multiple switching components open the chamber to connect the outside of the freezer and the storage cavity. The spaced arrangement of the multiple switching components reduces the leakage of cold air to the outside of the freezer, resulting in a smaller temperature difference between the switching components near the outside of the freezer and the outside of the freezer, insufficient to cause condensation or frost at the location of these switching components, thus not affecting the user's ability to open and close the freezer door assembly.

Description

Technical Field

[0001] This application relates to the field of freezer technology, specifically providing a balance valve, a door assembly, and a freezer. Background Technology

[0002] Freezers typically have a balancing valve. A valve plate is located at the end of the balancing valve closest to the outside of the freezer. When there is a significant pressure difference between the inside and outside of the freezer, the outside air pushes up the valve plate, forcing air into the storage chamber to balance the pressure difference created by opening and closing the door. Because the temperature inside the freezer is lower, the gas temperature near the storage chamber in the balancing valve's gas passage is lower than the temperature near the outside. This increased temperature difference causes condensation to form near the outside of the gas passage. Accumulated condensation can frost or ice, blocking the valve plate and preventing it from rotating. This prevents the valve from balancing the negative pressure inside the freezer, resulting in increased door opening force and a difficult-to-open experience. Summary of the Invention

[0003] This application aims to solve the aforementioned technical problem, namely, to resolve the issue that the valve plate of the balance valve in existing freezers is prone to malfunction due to freezing.

[0004] This application provides a balancing valve disposed within the door assembly of a freezer. The balancing valve includes: a valve body with a chamber inside, a first end of the chamber communicating with the storage cavity of the freezer, and a second end of the chamber communicating with the outside of the freezer; and a plurality of switching assemblies spaced apart within the chamber. When the plurality of switching assemblies are not under force, the plurality of switching assemblies close the chamber. Only when air is introduced into the storage cavity from the outside of the freezer, the plurality of switching assemblies open the chamber to connect the outside of the freezer and the storage cavity.

[0005] In the above-mentioned optional technical solution of the balancing valve, the plurality of switching components include a rotating shaft and a stop plate. The rotating shaft is mounted on the valve body, and the stop plate can rotate around the rotating shaft to open or close the chamber.

[0006] In the above-mentioned optional technical solution of the balance valve, the plurality of switching components include a first switching component and a second switching component. The first switching component is disposed at the second end of the chamber, and the second switching component is disposed inside the chamber. When the second switching component is not subjected to external force, the second switching component divides the chamber into a first chamber and a second chamber. The first chamber is connected to the storage chamber, and the second chamber is connected to the outside of the freezer.

[0007] In the above-mentioned optional technical solution of the balancing valve, the valve body includes a first part and a second part that are detachably connected. The first part and the second part together enclose the first chamber, the second chamber is located inside the second part, and the second switching assembly is located between the first chamber and the second chamber.

[0008] In the above-mentioned optional technical solution of the balancing valve, the second part includes a partition plate located between the first chamber and the second chamber. When the second switching assembly is not subjected to external force, the stop plate of the second switching assembly abuts against the partition plate, so that the partition plate and the stop plate together separate the first chamber and the second chamber.

[0009] In the optional technical solutions of the above-mentioned balancing valve, a heat insulation plate is also included. The heat insulation plate is disposed in the first chamber and is attached to the partition plate.

[0010] In the above-mentioned optional technical solution of the balancing valve, the first part is provided with a rib, which abuts perpendicularly to the heat insulation plate and is used to fix the heat insulation plate.

[0011] In the above-mentioned optional technical solution of the balancing valve, the partition plate is provided with positioning ribs on the side facing the first chamber, and the positioning ribs are respectively located at both ends of the heat insulation plate.

[0012] In the above-mentioned optional technical solution of the balancing valve, a guide plate is provided in the second chamber, and the two ends of the guide plate are respectively connected to the partition plate and the inner wall of the second chamber, so that the second chamber is divided into multiple gas channels.

[0013] In the above-mentioned optional technical solution of the balance valve, a sealing plate is provided outside the first end of the first chamber, and the sealing plate is used to fit with the door assembly, wherein the first end of the first chamber is the end close to the storage cavity.

[0014] This application also provides a door assembly, including: a balance valve as described in any of the above technical solutions; a door body, wherein a cavity is provided inside the door body, and the door body is also provided with an air inlet and an air outlet, the air inlet communicating with the outside of the freezer, the air outlet communicating with the storage cavity, the balance valve being disposed in the cavity, and the balance valve communicating with the air inlet and the air outlet respectively, so that the outside of the freezer can unidirectionally intake air into the storage cavity.

[0015] In the optional technical solutions of the above-mentioned door assembly, the door includes a base plate, the balance valve is detachably connected to the base plate, the air inlet is disposed on the base plate, and the second end of the chamber is connected to the air inlet so that the chamber can be connected to the outside of the freezer.

[0016] In the optional technical solutions of the above-mentioned door assembly, the valve body is provided with one of a protrusion or a groove, and the air inlet is provided with the other of a groove or a protrusion. The protrusion and the groove cooperate to fix the balance valve to the base plate.

[0017] In the optional technical solution of the above-mentioned door assembly, the door further includes an inner panel, which faces the storage cavity. The air outlet is disposed on the inner panel and corresponds to the first end of the cavity, so that the cavity communicates with the storage cavity. When the first end of the cavity is provided with a sealing plate, the sealing plate is fitted to the inner panel.

[0018] This application also provides a freezer, including the balance valve as described in any of the above technical solutions, or including the door assembly as described in any of the above technical solutions.

[0019] By adopting the above technical solution, this application can reduce the leakage of cold air to the outside of the freezer by arranging multiple switch components at intervals in the chamber, so that the temperature difference between the switch components near the outside of the freezer and the outside of the freezer is small, which is not enough to cause condensation or frost at the location of the switch components, and thus will not affect the user's ability to switch the freezer door components. Attached Figure Description

[0020] The preferred embodiments of this application are described below with reference to the accompanying drawings, in which:

[0021] Figure 1 This is a schematic diagram of the balancing valve of this application;

[0022] Figure 2 yes Figure 1 A schematic diagram showing the disassembly of the central balancing valve;

[0023] Figure 3 yes Figure 1 Front view of the balance valve;

[0024] Figure 4 yes Figure 3 A cross-sectional view (AA) of the balance valve in the closed chamber of the switching assembly.

[0025] Figure 5 yes Figure 3 A cross-sectional view (AA) of the balance valve in the state where the switching assembly opens the chamber;

[0026] Figure 6 This is a schematic diagram of the door assembly of this application;

[0027] Figure 7 yes Figure 6 A breakdown diagram of the middle door assembly;

[0028] Figure 8 This is a schematic diagram showing the connection between the inner plate, the bottom plate, and the balance valve of the door assembly of this application;

[0029] Figure 9 This is a schematic diagram showing the disassembled bottom plate and balance valve of the door assembly of this application.

[0030] List of reference numerals in the attached diagram:

[0031] 1. Door assembly; 10. Balance valve; 11. Valve body; 110. Chamber; 110a. First end of chamber; 110b. Second end of chamber; 111. First chamber; 112. Second chamber; 113. First part; 1131. Rib; 114. Second part; 1141. Partition plate; 1142. Positioning rib; 115. Heat insulation plate; 116. Guide plate; 117. Gas passage; 118. Sealing plate; 12. Switch assembly; 121. First switch assembly; 122. Second switch assembly; 123. Rotating shaft; 124. Stop plate; 125. Groove; 13. Door body; 130. Cavity; 131. Inner plate; 1311. Air outlet; 132. Bottom plate; 1321. Air inlet; 1322. Protrusion. Detailed Implementation

[0032] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. In the following description relating to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The terms “first,” “second,” and similar terms used in this specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. “A plurality of” means two or more.

[0033] Unless otherwise stated, the orientation or positional relationship indicated by "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Furthermore, "connection" should be interpreted broadly; 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 a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] Combination Figures 1 to 5 This application provides a balancing valve 10, which is mainly used to install inside the door assembly 1 of a freezer. The balancing valve 10 includes a valve body 11 and multiple switching assemblies 12. A chamber 110 is provided inside the valve body 11. The first end 110a of the chamber 110 can communicate with the storage cavity of the freezer, and the second end 110b of the chamber 110 can communicate with the outside of the freezer. The multiple switching assemblies 12 are spaced apart inside the chamber 110. (See reference...) Figure 4 When all switching components 12 are not subjected to force, the multiple switching components 12 close the chamber 110, as shown in the reference. Figure 5 Only when air enters the storage cavity from the outside of the freezer, multiple switching components 12 open chamber 110 to connect the outside of the freezer and the storage cavity. The switching components 12 of this application can only move in one direction. That is, when the air pressure outside the freezer is higher than that inside the storage cavity, and the pressure difference between the outside of the freezer and the storage cavity is large enough, the external gas can open the switching components 12, thereby connecting the outside of the freezer and the storage cavity through chamber 110. This ensures that air can enter the storage cavity from the outside of the freezer, making it easier for the user to open the freezer door assembly 1. However, when the air pressure inside the storage cavity is greater than that outside the freezer, the switching components 12 cannot be opened by the gas inside the storage cavity. Therefore, the balancing valve 10 of this application can only allow air to enter the storage cavity unidirectionally from the outside of the freezer, thus preventing cold air from flowing out of the storage cavity and wasting cooling capacity.

[0036] Furthermore, because multiple switch components 12 are spaced apart, when cold air from the storage cavity escapes to the outside of the freezer, the cold air first flows into the chamber 110 and is then blocked by the switch components 12 located within the chamber 110. If some cold air bypasses this switch component 12 and continues to flow to the outside of the freezer, the cold air is further blocked by the switch components 12 closer to the outside of the freezer. Since the cold air in the storage cavity is blocked sequentially by the spaced-apart switch components 12, the spaced-apart arrangement of multiple switch components 12 reduces the leakage of cold air to the outside of the freezer. In addition, because the amount of cold air leaking from the chamber 110 to the outside of the freezer is reduced, the switch components 12 closer to the outside of the freezer come into contact with the least amount of cold air. At this time, the temperature difference between the switch components 12 closer to the outside of the freezer and the outside of the freezer is small, insufficient to cause condensation or frost at the location of the switch components 12. When there is no condensation or ice on the surface of the switch components 12 closer to the outside of the freezer, it will not affect the opening or closing of the switch components 12 closer to the outside of the freezer, and thus will not increase the force required by the user to open or close the door assembly 1.

[0037] In one embodiment, combined with Figures 2 to 5 The plurality of switch assemblies 12 include a first switch assembly 121 and a second switch assembly 122. The first switch assembly 121 is disposed at the second end 110b of the chamber 110, and the second switch assembly 122 is disposed inside the chamber 110, such as... Figure 4 As shown, when the second switch assembly 122 is not subjected to external force, it divides the chamber 110 into a first chamber 111 and a second chamber 112. The first chamber 111 is connected to the storage chamber, and the second chamber 112 is connected to the outside of the freezer. By dividing the chamber 110 into the first chamber 111 and the second chamber 112 via the second switch assembly 122, when the pressure difference between the outside of the freezer and the storage chamber is insufficient to open the first switch assembly 121 and the second switch assembly 122, the first switch assembly 121 and the second switch assembly 122 close the chamber 110. Since the first chamber 111 is connected to the storage chamber, the cold air in the storage chamber can enter the first chamber 111. However, since the first chamber 111 and the second chamber 112 are separated by the second switch assembly 122, the cold air in the first chamber 111 cannot continue to be transferred to the second chamber 112. Therefore, the temperature in the second chamber 112 is closer to the outside of the freezer than the outside temperature. As a result, condensation or frost will not form on the first switch assembly 121 near the outside of the freezer. Therefore, it is easier for the user to open the door assembly 1.

[0038] It should be noted that the multiple switch components 12 may include at least two, or may be set to only two, including a first switch component 121 and a second switch component 122, or may be set to more than two. This application will describe the case with two switch components 12 as an example.

[0039] In one embodiment, reference Figure 2 Any one or more of the multiple switching assemblies 12 may include a rotating shaft 123 and a stop plate 124. The rotating shaft 123 is mounted on the valve body 11, and the stop plate 124 can rotate around the rotating shaft 123 to open or close the chamber 110. Each switching assembly 12 is composed of a rotating shaft 123 and a stop plate 124. The stop plate 124 can rotate around the rotating shaft 123. When the stop plate 124 is not subjected to external force, the stop plate 124 closes the chamber 110. When the stop plate 124 is impacted by gas from outside the refrigerator, it can rotate around the rotating shaft 123, thereby opening the chamber 110. The above-mentioned switching assembly 12 has a simple structure, can achieve the function of balancing pressure difference while occupying a small space inside the balancing valve 10, and can also save costs.

[0040] It should be noted that the rotating shaft 123 can be directly and rotatably mounted on the valve body 11. When the switching assembly 12 is not subjected to external force, the stop plate 124 can close the chamber 110 by its own weight. When the external gas of the freezer opens the switching assembly 12, the external gas overcomes the weight of the stop plate 124, blowing the stop plate 124 up and allowing air to enter the storage chamber. Of course, a torsion spring can also be installed on the rotating shaft 123. In this case, the torsion spring applies a certain torsion to the rotating shaft 123. When the external gas of the freezer opens the switching assembly 12, the external gas overcomes the weight of the stop plate 124 and the torsional force applied by the torsion spring. The connection between the rotating shaft 123 and the valve body 11 is not restrictive and can be configured according to the needs of those skilled in the art. All of the above are within the protection scope of this application.

[0041] In one embodiment, combined with Figure 1 and Figure 2 The valve body 11 includes a detachably connected first part 113 and a second part 114. The first part 113 and the second part 114 together enclose a first chamber 111. A second chamber 112 is located within the second part 114, and a second switch assembly 122 is located between the first chamber 111 and the second chamber 112. By configuring the valve body 11 with a detachable first part 113 and a detachable second part 114, the detachable valve body 11 can be quickly installed in a freezer. Furthermore, when the second switch assembly 122 needs to be installed, it can be installed first on the second part 114, and then the first part 113 can be installed on the second part 114, thus achieving overall installation of the valve body 11. This configuration of the valve body 11 reduces the difficulty of mold making and facilitates installation. Additionally, when a component is damaged, the corresponding component can be directly replaced, reducing maintenance difficulty.

[0042] In one embodiment, combined with Figures 2 to 5The second part 114 includes a partition plate 1141, which is located between the first chamber 111 and the second chamber 112. When the second switching assembly 122 is not subjected to external force, the stop plate 124 of the second switching assembly 122 abuts against the partition plate 1141, so that the partition plate 1141 and the stop plate 124 together separate the first chamber 111 and the second chamber 112. Since the partition plate 1141 is provided between the first chamber 111 and the second chamber 112, the cold air in the first chamber 111 is blocked from entering the second chamber 112 by the partition plate 1141. Since the passage between the first chamber 111 and the second chamber 112 can be sealed by the stop plate 124, when the first chamber 111 and the second chamber 112 are not connected, the partition plate 1141 and the stop plate 124 can work together to separate the first chamber 111 and the second chamber 112. Because the partition plate 1141 and the stop plate 124 separate the first chamber 111 and the second chamber 112, the volume of the stop plate 124 can be appropriately reduced. At this time, the weight of the stop plate 124 is reduced, thus reducing the difficulty for the gas outside the freezer to overcome the weight of the stop plate 124 when there is a pressure difference between the inside and outside of the freezer, making it easier to push the stop plate 124. In addition, when the second switch assembly 122 is opened, the gas outside the freezer needs to bypass the partition plate 1141 after passing through the second chamber 112 before entering the first chamber 111. Therefore, the partition plate 1141 can increase the length of the gas passage 117 of the chamber 110, thereby lengthening the temperature gradient between the first chamber 111 and the second chamber 112, reducing the temperature difference between the first switch assembly 121 and the outside, and further preventing condensation or frost on the first switch assembly 121. Therefore, it further saves the user the force required to open the door assembly 1.

[0043] In one embodiment, reference continues... Figure 2 A baffle plate 116 is provided in the second chamber 112. The two ends of the baffle plate 116 are respectively connected to the partition plate 1141 and the inner wall of the second chamber 112, so that the second chamber 112 is divided into multiple gas channels 117. The baffle plate 116 divides the second chamber 112 into multiple gas channels 117 to ensure that the gas outside the freezer enters the second chamber 112 in an orderly manner, thereby making the temperature distribution in the second chamber 112 more continuous, thereby further reducing the temperature difference between the first switch assembly 121 and the outside of the freezer, and further avoiding the problem that the first switch assembly 121 cannot balance the pressure difference inside and outside the freezer due to freezing.

[0044] In one embodiment, reference Figure 4 and Figure 5The balancing valve 10 also includes a heat insulation plate 115, which is disposed within the first chamber 111 and is fitted to the partition plate 1141. To reduce the amount of cold air transferred from the first chamber 111 to the second chamber 112 through the partition plate 1141, the heat insulation plate 115 can be installed on the partition plate 1141. In this case, the amount of cold air transferred from the first chamber 111 to the second chamber 112 is reduced, resulting in less cold air being transferred to the first switching assembly 121. With less cold air, the first switching assembly 121 will not experience condensation or ice formation on its surface, thus preventing any impact on the user's ability to switch on / off the refrigerator door assembly 1.

[0045] It should be noted that the heat insulation board 115 can be PE, or other heat insulation materials. The material of the heat insulation board 115 can be selected according to the needs of those skilled in the art, and all of the above are within the protection scope of this application.

[0046] In one embodiment, reference continues... Figure 2 , Figure 4 and Figure 5 The partition plate 1141 has positioning ribs 1142 on the side facing the first chamber 111, and the positioning ribs 1142 are located at both ends of the heat insulation plate 115. The positioning ribs 1142 can position the heat insulation plate 115 to avoid affecting the heat insulation effect due to inaccurate installation position during the installation of the heat insulation plate 115.

[0047] In one embodiment, reference continues... Figure 2 The first part 113 is provided with a raised rib 1131, which abuts perpendicularly to the heat insulation plate 115 to fix the heat insulation plate 115. When the heat insulation plate 115 is placed in the first chamber 111, the raised rib 1131 is provided in the first part 113 to prevent the heat insulation plate 115 from moving. When the first part 113 is installed on the second part 114, the raised rib 1131 abuts against the heat insulation plate 115. At this time, the heat insulation plate 115 cannot move, so the heat insulation plate 115 can fit more stably against the partition plate 1141. This more effectively reduces the amount of cold air transferred from the first chamber 111 to the second chamber 112. In addition, the rib 1131 can also divide the first chamber 111 into two parts, that is, divide the first chamber 111 into two channels. Therefore, when the gas outside the freezer flows into the first chamber 111 through the second chamber 112, it can enter the storage cavity in an orderly manner through the two channels of the first chamber 111, thereby improving the air intake efficiency into the storage cavity.

[0048] It should be noted that the rib 1131 can be set as one or multiple ribs arranged side by side. When set as one rib, the first chamber 111 is divided into two channels. When set as multiple ribs, the first chamber 111 is divided into more channels. The above is not restrictive and can be set according to the needs of those skilled in the art. All of the above are within the protection scope of this application.

[0049] In one embodiment, reference Figure 1 A sealing plate 118 is provided around the first end of the first chamber 111 (i.e., the first end 110a of the chamber 110). The sealing plate 118 is used to fit against the door assembly 1, wherein the first end of the first chamber 111 is the end closer to the storage cavity. The sealing plate 118 is fitted against the door assembly 1 to prevent gas entering the first chamber 111 from outside the freezer from escaping to places outside the storage cavity.

[0050] Combination Figures 6 to 9 This application also provides a door assembly 1, including a door body 13 and a balance valve 10 according to any of the above technical solutions. The door body 13 has a cavity 130, an air inlet 1321, and an air outlet 1311. The air inlet 1321 communicates with the outside of the freezer, and the air outlet 1311 communicates with the storage cavity. The balance valve 10 is disposed within the cavity 130 and is connected to both the air inlet 1321 and the air outlet 1311, allowing air to flow unidirectionally from the outside of the freezer into the storage cavity. Disposing of the balance valve 10 within the cavity 130 of the door body 13 reduces the space occupied by the balance valve 10 within the freezer. Furthermore, because the balance valve 10 is relatively small, it does not increase the thickness of the door body 13, thus avoiding increased costs.

[0051] In one embodiment, reference Figure 7 and Figure 8 The door body 13 also includes an inner plate 131, which faces the storage cavity. An air outlet 1311 is disposed on the inner plate 131 and corresponds to the first end 110a of the chamber 110 so that the chamber 110 communicates with the storage cavity. When the first end 110a of the chamber 110 is provided with a sealing plate 118, the sealing plate 118 is fitted to the inner plate 131. When the chamber 110 of the balance valve 10 is divided into the first chamber 111 and the second chamber 112, the air outlet 1311 corresponds to the first chamber 111 and the air inlet 1321 corresponds to the second chamber 112. At this time, the sealing plate 118 is set at one end of the first chamber 111 and is in contact with the inner plate 131. When the gas outside the freezer is transmitted to the storage chamber, the gas passing through the first chamber 111 will not escape into the cavity 130 due to the action of the sealing plate 118 and the inner plate 131 being in contact, thereby ensuring that the balance valve 10 can more efficiently balance the pressure difference between the storage chamber and the outside of the freezer.

[0052] In one embodiment, reference Figure 9 The door 13 includes a base plate 132, a balance valve 10 detachably connected to the base plate 132, an air inlet 1321 disposed on the base plate 132, and a second end 110b of the chamber 110 communicating with the air inlet 1321, so that the chamber 110 can communicate with the outside of the freezer. The balance valve 10 is detachably connected to the base plate 132 of the door 13, so that if the balance valve 10 fails, it can be replaced promptly without having to replace the entire door assembly 1, thus improving maintenance efficiency and reducing maintenance costs.

[0053] In one embodiment, reference continues... Figure 9 The valve body 11 is provided with either a protrusion 1322 or a groove 125, and the air inlet 1321 is provided with either a groove 125 or a protrusion 1322. The protrusion 1322 and the groove 125 cooperate to fix the balance valve 10 to the base plate 132. The valve body 11 and the base plate 132 are engaged by the protrusion 1322 and the groove 125.

[0054] It should be noted that the valve body 11 and the base plate 132 can also be detachably connected in other ways, such as by bolt connection. The above is not limiting and can be set according to the needs of those skilled in the art. All of the above are within the protection scope of this application.

[0055] In addition, this application also provides a freezer having the door assembly 1 described in any of the above embodiments, or the freezer having the balance valve 10 described in any of the above embodiments.

[0056] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A balancing valve, characterized in that, The balancing valve, located within the door assembly of the freezer, includes: The valve body has a chamber inside, the first end of which can communicate with the storage chamber of the freezer, and the second end of which can communicate with the outside of the freezer. Multiple switching components are spaced apart within the chamber. When the multiple switching components are not under force, the multiple switching components close the chamber. Only when air is introduced into the storage chamber from the outside of the freezer, the multiple switching components open the chamber to connect the outside of the freezer and the storage chamber.

2. The balancing valve according to claim 1, characterized in that, The plurality of switching assemblies include a rotating shaft and a stop plate, the rotating shaft being mounted on the valve body and the stop plate being rotatable about the rotating shaft to open or close the chamber.

3. The balancing valve according to claim 2, characterized in that, The plurality of switching components include a first switching component and a second switching component. The first switching component is disposed at the second end of the chamber, and the second switching component is disposed inside the chamber. When the second switching component is not subjected to external force, the second switching component divides the chamber into a first chamber and a second chamber. The first chamber is connected to the storage chamber, and the second chamber is connected to the outside of the freezer.

4. The balancing valve according to claim 3, characterized in that, The valve body includes a detachably connected first part and a second part, the first part and the second part together enclosing the first chamber, the second chamber being located within the second part, and the second switching assembly being located between the first chamber and the second chamber.

5. The balancing valve according to claim 4, characterized in that, The second part includes a partition plate located between the first chamber and the second chamber. When the second switching assembly is not subjected to external force, the stop plate of the second switching assembly abuts against the partition plate, so that the partition plate and the stop plate together separate the first chamber and the second chamber.

6. The balancing valve according to claim 5, characterized in that, It also includes a heat insulation plate, which is disposed in the first cavity and is attached to the partition plate.

7. The balancing valve according to claim 6, characterized in that, The first part is provided with a raised rib, which abuts perpendicularly to the heat insulation plate to fix the heat insulation plate.

8. The balancing valve according to claim 6, characterized in that, The partition plate has positioning ribs on the side facing the first chamber, and the positioning ribs are located at both ends of the heat insulation plate.

9. The balancing valve according to any one of claims 5 to 8, characterized in that, A flow guide plate is provided in the second chamber, and the two ends of the flow guide plate are respectively connected to the partition plate and the inner wall of the second chamber, so that the second chamber is divided into multiple gas channels.

10. The balancing valve according to claim 3, characterized in that, A sealing plate is provided around the first end of the first chamber, the sealing plate being used to fit against the door assembly, wherein the first end of the first chamber is the end closer to the storage cavity.

11. A door assembly, characterized in that, include: The balancing valve according to any one of claims 1 to 10; The door body has a cavity inside, and the door body also has an air inlet and an air outlet. The air inlet is connected to the outside of the freezer, and the air outlet is connected to the storage cavity. The balancing valve is located in the cavity and is connected to the air inlet and the air outlet respectively, so that the outside of the freezer can unidirectionally draw air into the storage cavity.

12. The door assembly according to claim 11, characterized in that, The door includes a base plate, the balance valve is detachably connected to the base plate, the air inlet is disposed on the base plate, and the second end of the chamber is connected to the air inlet so that the chamber can communicate with the outside of the freezer.

13. The door assembly according to claim 12, characterized in that, The valve body is provided with one of a protrusion or a groove, and the air inlet is provided with the other of a groove or a protrusion. The protrusion and the groove cooperate to fix the balance valve to the base plate.

14. The door assembly according to claim 12, characterized in that, The door also includes an inner panel facing the storage cavity. The air outlet is located on the inner panel and corresponds to the first end of the cavity, so that the cavity communicates with the storage cavity. When the first end of the cavity is provided with a sealing plate, the sealing plate is fitted to the inner panel.

15. A freezer, characterized in that, It includes the balance valve as described in any one of claims 1 to 10, or the door assembly as described in any one of claims 11 to 14.

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