Single elastic piece bidirectional air pressure balance valve and refrigerator

Abstract

The application discloses a single-elastic-sheet bidirectional air pressure balance valve and a refrigerator, and relates to the technical field of refrigeration equipment. The single-elastic-sheet bidirectional air pressure balance valve comprises a valve body, an elastic sheet, a top cover and a locking sleeve. The inner wall of one end of the valve body is provided with an annular air passage plate. The outer side of the inner diameter of the annular air passage plate is provided with a first annular baffle. The outer end of the first annular baffle is detachably connected with the top cover. The inner wall of the first annular baffle is provided with a positioning edge. The outer wall of the middle part of the valve body is provided with a clamping shoulder. The valve body is provided with an annular positioning plate between the clamping shoulder and the annular air passage plate. The outer side of the inner diameter of the annular positioning plate is provided with a second annular baffle which is parallel to the inner wall of the valve body. The elastic sheet is connected to the top cover in an extending and retracting mode. The elastic sheet is in abutment with the outer end surface of the positioning edge and the outer end of the second annular baffle respectively. The elastic sheet is provided with a gas guide hole. The single-elastic-sheet bidirectional air pressure balance valve can realize the function of bidirectional air pressure adjustment with a single elastic sheet. The structure is simple. The valve body is not prone to icing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, in particular to a single elastic sheet bidirectional air pressure balance valve and a refrigerator. BACKGROUND

[0002] In the prior art, the refrigerator generally has positive and negative pressure, wherein the formation process of the negative pressure is roughly as follows: gas exchange is performed between the inner and outer compartments of the refrigerator, and the outer hot air enters the inner compartment of the refrigerator; after the door is closed, the temperature of the hot air in the inner compartment of the refrigerator gradually decreases under the action of refrigeration, the pressure in the inner compartment decreases, and a pressure difference is formed between the inside and outside of the refrigerator; the formation process of the positive pressure is roughly as follows: when the door of the refrigerator is closed, too much gas is brought into the refrigerator by the door, and positive pressure is formed.

[0003] The negative pressure can cause the following problems: difficulty in opening the door; the door seal is pulled for a long time, which is prone to deformation and cracking, thereby affecting the sealing performance of the cabinet, causing cold leakage, frost or condensation, high energy consumption, etc.; and the small and light refrigerator is prone to tipping over. The positive pressure can cause the following problems: the door is easily blown open by the air flow, and if not closed in time, it can cause cold leakage, frost, and increased energy consumption; the door seal is prone to deformation due to internal high pressure; to solve the problem of the door not being closed, the door magnetic force or return door force is increased, and the door is more difficult to open under negative pressure.

[0004] To solve the problem of positive and negative pressure of the refrigerator, some bidirectional air pressure valves appear in the prior art, but some common bidirectional air pressure valves usually use two balls or elastic sheets to ensure bidirectional air pressure adjustment, which has more components and a complex overall structure, and is not convenient for assembly of the valve body and installation and disassembly of the valve body; and when the air pressure balance valve is installed in the freezer, ice is prone to form in the valve body, which affects the air pressure balance effect. SUMMARY

[0005] The present application aims to provide a single elastic sheet bidirectional air pressure balance valve and a refrigerator, which can realize the function of bidirectional air pressure adjustment with only a single elastic sheet, has a simple structure, and is convenient and simple to assemble and install, easy to disassemble and clean, and the valve body is not prone to ice formation, thereby ensuring the air pressure balance effect.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] Provided is a single-elastic-sheet bidirectional air pressure balance valve, comprising a valve body, an elastic sheet, a top cover and a locking sleeve; the valve body is a tubular structure with open ends, an annular air passage plate is arranged on the inner wall of one end of the valve body, the surface of the annular air passage plate is provided with air passage holes, the outer side of the inner diameter of the annular air passage plate is provided with a first annular baffle parallel to the inner wall of the valve body, the outer end of the first annular baffle is detachably connected with the top cover, the inner wall of the first annular baffle is provided with a positioning edge, the outer wall of the middle part of the valve body is provided with a clamping shoulder, the inner part of the valve body between the clamping shoulder and the annular air passage plate is provided with an annular positioning plate, the outer side of the inner diameter of the annular positioning plate is provided with a second annular baffle parallel to the inner wall of the valve body, the outer diameter of the second annular baffle is smaller than the inner diameter of the positioning edge, the outer end of the second annular baffle is flush with the outer end surface of the positioning edge, the elastic sheet is connected to the top cover in an extendable and retractable manner, and the side of the elastic sheet away from the top cover abuts against the outer end surface of the positioning edge and the outer end of the second annular baffle respectively, the elastic sheet is provided with a gas guide hole, the gas guide hole is located in the inner diameter of the second annular baffle, and the locking sleeve is detachably connected to the outer periphery of the other end of the valve body and faces the clamping shoulder.

[0008] As a preferred solution of the single-elastic-sheet bidirectional air pressure balance valve, the elastic sheet is connected to the top cover in an extendable and retractable manner by the self-weight of the elastic sheet, or is connected to the top cover in an elastic and retractable manner.

[0009] As a preferred solution of the single-elastic-sheet bidirectional air pressure balance valve, the inner end surface of the top cover is provided with a pipe sleeve, the side of the elastic sheet close to the top cover is provided with a guide pipe, the outer diameter of the guide pipe matches the inner diameter of the pipe sleeve, the elastic sheet is connected to the pipe sleeve of the top cover in an extendable and retractable manner through the guide pipe, and when the valve body is vertically upward with the end with the top cover, the elastic sheet abuts against the outer end surface of the positioning edge and the outer end of the second annular baffle in a self-weight manner.

[0010] As a preferred solution of the single-elastic-sheet bidirectional air pressure balance valve, the inner end surface of the top cover is provided with a pipe sleeve, the side of the elastic sheet close to the top cover is provided with a guide pipe, the outer diameter of the guide pipe matches the inner diameter of the pipe sleeve, the elastic sheet is connected to the pipe sleeve of the top cover in an extendable and retractable manner through the guide pipe, the outer periphery of the guide pipe is sleeved with a spring, the two ends of the spring abut against the pipe sleeve and the elastic sheet respectively, and the elastic sheet abuts against the outer end surface of the positioning edge and the outer end of the second annular baffle in an elastic and retractable manner.

[0011] As a preferred solution of the single-elastic-sheet bidirectional air pressure balance valve, the outer wall of the top cover is provided with external threads, the inner wall of the first annular baffle is provided with internal threads, the top cover is threadedly connected to the first annular baffle, the number of the guide pipe and the pipe sleeve is one, the guide pipe is located at the center of the elastic sheet, and the pipe sleeve is located at the center of the top cover.

[0012] As a preferred solution of the single-elastic-sheet bidirectional air pressure balance valve, the outer end surface of the top cover is provided with a hand screwing part.

[0013] As a preferred solution of the single-elastic-sheet bidirectional air pressure balance valve, the outer periphery of the hand screwing part is provided with anti-skid lines.

[0014] As a preferred solution of the single-elastic-sheet bidirectional air pressure balance valve, the outer end surface of the top cover is provided with an extension part extending in a radial outer periphery, which is opposite to the annular air passage plate.

[0015] As a preferred solution of the single-elastic-sheet bidirectional air pressure balance valve, the outer wall of the valve body away from the top cover is provided with external threads, and the inner wall of the locking sleeve is provided with internal threads, and the locking sleeve is threadedly connected to the outer periphery of the valve body away from the top cover.

[0016] As a preferred solution of the single-elastic-sheet bidirectional air pressure balance valve, the opposite surfaces of the locking sleeve and the clamping shoulder are respectively provided with sealing rings.

[0017] As a preferred solution of the single-elastic-sheet bidirectional air pressure balance valve, the outer periphery of the locking sleeve is provided with anti-skid lines.

[0018] The application further provides a refrigerator, which comprises a cabinet body, the cabinet body is provided with a mounting hole at a refrigerating unit, and the mounting hole is mounted with the single-elastic-sheet bidirectional air pressure balance valve.

[0019] The single-elastic-sheet bidirectional air pressure balance valve and the refrigerator have the following advantages: the valve body is provided with the cooperation structure of the annular air passage plate, the first annular baffle, the positioning edge, the annular positioning baffle and the second annular baffle, and the elastic sheet with the air guide hole is in elastic abutment with the outer end surface of the positioning edge and the outer end surface of the second annular baffle through the top cover, so that the single-elastic-sheet bidirectional air pressure balance valve can realize the function of bidirectional air pressure adjustment, has a simple structure and is easy to assemble; the valve body can be clamped to the mounting hole of the cabinet body of the refrigerator through the cooperation structure of the locking sleeve and the clamping shoulder, and is easy to install and disassemble; further, the elastic sheet is located outside the clamping shoulder, i.e. the elastic sheet is located outside the cabinet body and away from the interior of the refrigerator during installation, and the single-elastic-sheet bidirectional air pressure balance valve is also installed in the mounting hole at the refrigerating unit of the cabinet body, so that the waste heat generated by the refrigerating unit can be effectively utilized to prevent the elastic sheet from being frozen and adhered and ensure the air pressure balance effect. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced. Obviously, the drawings described below are only some of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0021] Figure 1 is a structural schematic diagram of a single spring two-way air pressure balance valve according to an embodiment of the present application when installed in a refrigerator;

[0022] Figure 2 is a structural schematic diagram of a single spring two-way air pressure balance valve according to an embodiment of the present application;

[0023] Figure 3 is another angle structural schematic diagram of a single spring two-way air pressure balance valve according to an embodiment of the present application;

[0024] Figure 4 is a sectional structural schematic diagram of a single spring two-way air pressure balance valve according to an embodiment of the present application;

[0025] Figure 5 is a structural schematic diagram of a valve body according to an embodiment of the present application;

[0026] Figure 6 is a sectional structural schematic diagram of a valve body according to an embodiment of the present application;

[0027] Figure 7 is a structural schematic diagram of a top cover according to an embodiment of the present application;

[0028] Figure 8 is another angle structural schematic diagram of a top cover according to an embodiment of the present application;

[0029] Figure 9 is a structural schematic diagram of a spring according to an embodiment of the present application.

[0030] In the drawings:

[0031] 1, valve body; 2, spring; 3, top cover; 301, extension; 4, locking sleeve; 5, annular air passage plate; 6, first annular baffle; 7, clamping shoulder; 8, annular positioning plate; 9, positioning edge; 10, pipe sleeve; 11, guide pipe; 12, spring; 13, sealing ring; 14, cabinet body; 15, second annular baffle; 16, hand screwing part; 17, air guide hole. DETAILED DESCRIPTION

[0032] The embodiments of the present disclosure will be described in detail below with reference to the drawings.

[0033] Following, the embodiments of the present disclosure are illustrated by specific examples, and other advantages and effects of the present disclosure can be easily understood by those skilled in the art from the disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The present disclosure can also be implemented or applied by other different specific embodiments, and various modifications or changes can be made to the details in the specification without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present disclosure.

[0034] Referring to Figures 1-9 , an embodiment of the present application provides a single-elastic-sheet bidirectional air pressure balance valve, comprising: a valve body 1, an elastic sheet 2, a top cover 3 and a locking sleeve 4; the valve body 1 is a tubular structure with open ends, an annular air passage plate 5 is arranged on the inner wall of one end of the valve body 1, air holes are distributed on the surface of the annular air passage plate 5, a first annular baffle 6 parallel to the inner wall of the valve body 1 is arranged on the outer side of the inner diameter of the annular air passage plate 5, the outer end of the first annular baffle 6 is detachably connected with the top cover 3, a positioning rim 9 is arranged on the inner wall of the first annular baffle 6, a clamping shoulder 7 is arranged on the outer wall of the valve body 1, a ring-shaped positioning plate 8 is arranged between the clamping shoulder 7 and the annular air passage plate 5 in the valve body 1, a second annular baffle 15 parallel to the inner wall of the valve body 1 is arranged on the outer side of the inner diameter of the ring-shaped positioning plate 8, the outer diameter of the second annular baffle 15 is smaller than the inner diameter of the positioning rim 9, the outer end of the second annular baffle 15 is flush with the outer end surface of the positioning rim 9, the elastic sheet 2 is telescopically connected to the top cover 3, the telescopic direction of the elastic sheet 2 is the same as the length direction of the valve body 1, and the side of the elastic sheet 2 away from the top cover 3 abuts against the outer end surface of the positioning rim 9 and the outer end of the second annular baffle 15 respectively, the elastic sheet 2 is provided with a gas guide hole 17, the gas guide hole 17 is located in the inner diameter of the second annular baffle 15, and the locking sleeve 4 is detachably connected to the outer periphery of the other end of the valve body 1 and faces the clamping shoulder 7. Specifically, the gas guide hole 17 is a microporous structure, and the total area of the gas guide hole 17 is much smaller than the inner cross-sectional area of the second annular baffle 15, specifically, for example, the total area of the gas guide hole 17 is less than one tenth of the inner cross-sectional area of the second annular baffle 15.

[0035] Among them, the elastic sheet 2 can be telescopically connected to the top cover 3 by the self-weight of the elastic sheet 2, or connected to the top cover 3 by elastic telescopic mode.

[0036] In the technical scheme, the cooperation structure of the annular vent plate 5, the first annular baffle 6, the positioning edge 9, the annular positioning baffle and the second annular baffle 15 are arranged in the valve body 1, and the elastic sheet 2 with the air guide hole 17 is in telescopic abutment with the outer end face of the positioning edge 9 and the outer end of the second annular baffle 15 through the top cover 3, so that the single elastic sheet 2 can realize the function of two-way air pressure adjustment, the structure is simple, and the assembly is convenient and simple. The valve body 1 can be clamped to the mounting hole of the refrigerator cabinet 14 through the cooperation structure of the locking sleeve 4 and the clamping shoulder 7, and the installation and disassembly are convenient and simple. Further, the elastic sheet 2 is located outside the clamping shoulder 7, that is, the elastic sheet 2 is located outside the cabinet 14 during installation and is far away from the inside of the refrigerator, so that the elastic sheet 2 is prevented from being frozen and bonded, and the air pressure balance effect is ensured.

[0037] When the refrigerator generates a negative pressure difference, for example, when the refrigerator is closed, the temperature of the hot air in the chamber is gradually reduced under the action of refrigeration, the pressure in the chamber is reduced, and a negative pressure difference is formed between the inside and outside of the refrigerator. When the negative pressure difference reaches a certain value, the outside air will open the elastic sheet 2 under the action of the negative pressure difference, and the outside air will enter the chamber through the air holes of the annular vent plate 5, the gap between the positioning edge 9 and the second annular baffle 15, and the inner diameter of the second annular baffle 15, thereby realizing the function of air pressure balance and facilitating the opening of the cabinet door. The air guide hole 17 plays a role in guiding air. When the elastic sheet 2 is opened, the air guide hole 17 is used to flow the air in the closed cavity formed by the top cover 3, the first annular baffle 6 and the elastic sheet 2 with the air in the cabinet, and the air in the closed cavity is guided out, so that the elastic sheet 2 can be smoothly opened. When the refrigerator generates a positive pressure difference, for example, when the refrigerator door is closed, too much outside air enters the chamber, and a positive pressure difference is generated. When the positive pressure difference reaches a certain value, the inside air will open the elastic sheet 2, and the inside air will be guided out to the outside of the refrigerator through the inner diameter of the second annular baffle 15, the gap between the positioning edge 9 and the second annular baffle 15, and the air holes of the annular vent plate 5, thereby realizing the function of air pressure balance and facilitating the smooth closing of the cabinet door. Similarly, the air guide hole 17 plays a role in guiding air. When the elastic sheet 2 is opened, the air guide hole 17 is used to flow the air in the closed cavity formed by the top cover 3, the first annular baffle 6 and the elastic sheet 2 with the air in the cabinet, and the air in the closed cavity is guided out, so that the elastic sheet 2 can be smoothly opened.

[0038] In some embodiments, the inner end surface of the top cover 3 is provided with a sleeve 10, the side of the elastic sheet 2 close to the top cover 3 is provided with a guide pipe 11, the outer diameter of the guide pipe 11 matches the inner diameter of the sleeve 10, the elastic sheet 2 is connected to the sleeve 10 of the top cover 3 through the guide pipe 11, when the valve body 1 is vertically upward with the top cover 3, the elastic sheet 2 abuts against the outer end surface of the positioning rim 9 and the outer end of the second annular baffle 15 by gravity. This structural design makes the elastic sheet 2 connected to the top cover 3 in an elastic manner, and when the single elastic sheet bidirectional air pressure balance valve is vertically upward installed in the refrigerator, the elastic sheet can reset by gravity and abut against the outer end surface of the positioning rim 9 and the outer end of the second annular baffle 15, realizing sealing without the need of other reset components, simple structure, stable elastic connection and convenient assembly.

[0039] In some embodiments, the inner end surface of the top cover 3 is provided with a sleeve 10, the side of the elastic sheet 2 close to the top cover 3 is provided with a guide pipe 11, the outer diameter of the guide pipe 11 matches the inner diameter of the sleeve 10, the elastic sheet 2 is connected to the sleeve 10 of the top cover 3 through the guide pipe 11, the outer periphery of the guide pipe 11 is sleeved with a spring 12, the two ends of the spring 12 abut against the sleeve 10 and the elastic sheet 2 respectively, and the elastic sheet 2 abuts against the outer end surface of the positioning rim 9 and the outer end of the second annular baffle 15 in an elastic manner. This structural design makes the elastic sheet 2 connected to the top cover 3 in an elastic manner, simple structure, stable elastic connection and convenient assembly, and in other embodiments, the guide pipe 11 can be arranged on the inner end surface of the top cover 3, the sleeve 10 can be arranged on the outer side surface of the elastic sheet 2, the outer periphery of the guide pipe 11 is sleeved with a spring 12, and the two ends of the spring 12 abut against the sleeve 10 and the top cover 3 respectively.

[0040] Further, the outer wall of the top cover 3 is provided with external threads, the inner wall of the first annular baffle 6 is provided with internal threads, the top cover 3 is threadedly connected to the first annular baffle 6, the number of the guide pipe 11 and the sleeve 10 is one, the guide pipe 11 is located at the center of the elastic sheet 2, and the sleeve 10 is located at the center of the top cover 3. This structural design makes the top cover 3 more convenient and simple to install and disassemble, and the elastic sheet 2 can be adjusted in an elastic manner by rotating the top cover 3, which is convenient and simple to operate.

[0041] In some embodiments, the outer end surface of the top cover 3 is provided with a hand screwing part 16. The hand screwing part 16 is used for rotating the top cover 3 by hand without the need of other auxiliary tools, which is more convenient and simple.

[0042] Specifically, the outer periphery of the hand screwing part 16 is provided with anti-skid lines. Specifically, the outer periphery of the hand screwing part 16 is uniformly distributed with protruding parts, which facilitates the user to rotate the top cover 3.

[0043] Further, the outer end surface of the top cover 3 is provided with an extension 301 extending in the radial outer periphery, which is opposite to the annular air passage plate 5. The extension 301 plays a shielding role for the annular air passage plate 5, and when the single-elastic-sheet bidirectional air pressure valve is installed vertically upward, the extension 301 can effectively prevent dust from directly falling on the annular air passage plate 5, is cleaner and more sanitary, and can effectively prevent dust from blocking the air passage hole and affecting the air pressure balance effect.

[0044] In some embodiments, the valve body 1 is provided with external threads at the outer wall of the end away from the top cover 3, the inner wall of the locking sleeve 4 is provided with internal threads, and the locking sleeve 4 is threadedly connected to the outer periphery of the end of the valve body 1 away from the top cover 3. This structural design makes the installation and dismounting of the single-elastic-sheet bidirectional air pressure balance valve more convenient and simple, and can adapt to refrigerators with different wall thicknesses, and has a wide range of applications.

[0045] Further, the opposite surfaces of the locking sleeve 4 and the clamping shoulder 7 are respectively provided with sealing rings 13. In other embodiments, the opposite surfaces of the locking sleeve 4 and the clamping shoulder 7 are respectively provided with grooves, and the grooves are provided with sealing rings 13. The sealing rings 13 can effectively play a sealing effect to prevent the refrigerator from leaking cold.

[0046] Specifically, the outer periphery of the locking sleeve 4 is provided with anti-slip patterns. For example, the outer periphery of the locking sleeve 4 is uniformly distributed with protrusions consistent with the axial direction of the locking sleeve 4. This structural design facilitates the manual rotation of the locking sleeve 4 without the need for auxiliary tools, and makes the installation and dismounting more convenient and simple.

[0047] Referring to Figure 1 , the embodiment of the present application also provides a refrigerator, which comprises a cabinet body 14, the cabinet body 14 is provided with a mounting hole at a refrigeration unit, and the mounting hole is mounted with the single-elastic-sheet bidirectional air pressure balance valve of any one of the above-mentioned embodiments. The clamping shoulder 7 is clamped to the outer wall of the cabinet body 14 at the mounting hole, and the locking sleeve 4 is clamped to the inner wall of the cabinet body 14 at the mounting hole.

[0048] In the above technical solution, the single-elastic-sheet bidirectional air pressure balance valve is also mounted in the mounting hole at the refrigeration unit of the cabinet body 14, which can effectively utilize the waste heat generated by the refrigeration unit, further prevent the elastic sheet 2 from being frozen and bonded, and ensure the air pressure balance effect.

[0049] In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the terms "middle", "length", "upper", "lower", "front", "back", "vertical", "horizontal", "inner", "outer", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0050] In the present application, unless specifically defined and limited otherwise, the first feature "on" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. The meaning of "a plurality of" is at least two, such as two, three, etc., unless specifically limited otherwise.

[0051] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] The above is only to illustrate the embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principles of the present application without creative labor shall be included in the protection scope of the present application.

Claims

1. A single poppet bidirectional air pressure balanced valve characterized by, Include: Valve body (1), spring (2), top cover (3) and locking sleeve (4); the valve body (1) is the tubular structure of the open end, the inner wall of one end of the valve body (1) is provided with annular vent plate (5), the surface of the annular vent plate (5) is distributed with vent hole, the outer side of the inner diameter of the annular vent plate (5) is provided with the first annular baffle (6) parallel to the inner wall of the valve body (1), the outer end of the first annular baffle (6) is detachably connected with the top cover (3), the inner wall of the first annular baffle (6) is provided with the positioning edge (9), the outer wall of the valve body (1) is provided with the shoulder (7), the valve body (1) is located between the shoulder (7) and the annular vent plate (5) and is provided with the annular positioning plate (8), the outer side of the inner diameter of the annular positioning plate (8) is provided with the second annular baffle (15) parallel to the inner wall of the valve body (1), the outer diameter of the second annular baffle (15) is less than the inner diameter of the positioning edge (9), the outer end of the second annular baffle (15) is flush with the outer end surface of the positioning edge (9), the spring (2) is connected to the top cover (3) in a telescopic manner, and the side of the spring (2) away from the top cover (3) is respectively abutted to the outer end surface of the positioning edge (9) and the outer end of the second annular baffle (15), the spring (2) is provided with a gas guide hole (17), the gas guide hole (17) is located in the inner diameter of the second annular baffle (15), and the locking sleeve (4) is detachably connected to the outer periphery of the other end of the valve body (1) and is opposite to the shoulder (7).

2. The one-piece two-way pressure balanced valve of claim 1, wherein, The spring (2) is connected to the top cover (3) in a telescopic manner by the weight of the spring (2), or is connected to the top cover (3) in an elastic telescopic manner.

3. The one-piece two-way pressure balanced valve of claim 2, wherein, The inner end surface of the top cover (3) is provided with a sleeve (10), one side of the spring (2) close to the top cover (3) is provided with a guide pipe (11), the outer diameter of the guide pipe (11) matches the inner diameter of the sleeve (10), the spring (2) is connected to the sleeve (10) of the top cover (3) through the guide pipe (11), when the valve body (1) is vertically upward with one end of the top cover (3), the spring (2) is abutted to the outer end surface of the positioning edge (9) and the outer end of the second annular baffle (15) by the weight.

4. The single-poppet bidirectional pressure balanced valve of claim 2, wherein, The inner end surface of the top cover (3) is provided with a sleeve (10), one side of the spring (2) close to the top cover (3) is provided with a guide pipe (11), the outer diameter of the guide pipe (11) matches the inner diameter of the sleeve (10), the spring (2) is connected to the sleeve (10) of the top cover (3) through the guide pipe (11), the outer periphery of the guide pipe (11) is sleeved with a spring (12), the two ends of the spring (12) are respectively abutted to the sleeve (10) and the spring (2), and the spring (2) is abutted to the outer end surface of the positioning edge (9) and the outer end of the second annular baffle (15) in an elastic telescopic manner.

5. The one-piece two-way pressure balanced valve of claim 4, wherein, The outer wall of the top cover (3) is provided with external threads, the inner wall of the first annular baffle (6) is provided with internal threads, the top cover (3) is threadedly connected to the first annular baffle (6), the number of the conduit (11) and the sleeve (10) is one, the conduit (11) is located at the center of the spring sheet (2), and the sleeve (10) is located at the center of the top cover (3).

6. The one-piece two-way pressure balanced valve of claim 1, wherein, The outer end surface of the top cover (3) is provided with a hand screwing part (16).

7. The one-piece two-way pressure balanced valve of claim 6, wherein, The outer periphery of the hand screwing part (16) is provided with anti-skid lines.

8. The one-piece two-way pressure balanced valve of claim 1, wherein, The outer end surface of the top cover (3) is provided with an extension part (301) extending in a radial outer periphery, and the extension part (301) faces the annular air vent plate (5).

9. The one-piece two-way pressure balanced valve of claim 1, wherein, The outer wall of the valve body (1) away from the top cover (3) is provided with external threads, the inner wall of the locking sleeve (4) is provided with internal threads, and the locking sleeve (4) is threadedly connected to the outer periphery of the valve body (1) away from the top cover (3).

10. The one-piece two-way pressure balanced valve of claim 9, wherein, The opposite surfaces of the locking sleeve (4) and the clamping shoulder (7) are respectively provided with sealing rings (13).

11. The one-piece two-way pressure balanced valve of claim 9, wherein, The outer periphery of the locking sleeve (4) is provided with anti-skid lines.

12. A refrigerator characterized by The refrigerator comprises a cabinet body (14), the cabinet body (14) is provided with a mounting hole at a refrigeration unit, and the mounting hole is mounted with the single-spring-sheet bidirectional air pressure balance valve according to any one of claims 1-11, wherein the clamping shoulder (7) is clamped to the outer wall of the cabinet body (14) at the mounting hole, and the locking sleeve (4) is clamped to the inner wall of the cabinet body (14) at the mounting hole.

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