One-way valve and refrigeration equipment

Abstract

The utility model discloses a one-way valve and refrigeration equipment, and relates to the technical field of fluid control components, the one-way valve comprises a valve body and a piston assembly, and the valve body is provided with a valve port; the piston assembly comprises a piston head and a piston rod which are arranged in a split mode, the piston head is movably arranged on the valve port, one end of the piston rod penetrates through the valve body and is connected with the piston head, and the piston assembly can move in the axial direction of the valve body so that the piston head can open or close the valve port. According to the technical scheme, the piston head and the piston rod are machined in a split machining mode, the machining allowance of the piston assembly is reduced, and therefore the machining cost of the one-way valve is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid control components, in particular to a one-way valve and a refrigeration device. Background Art

[0002] In the prior art, the piston and the piston shaft of the one-way valve are generally processed in one piece. Although this processing method has a small number of parts, it not only has a large processing allowance, but also a large amount of material consumption, resulting in high material and processing costs. Utility Model Content

[0003] The main purpose of the utility model is to provide a one-way valve and a refrigeration device, aiming to reduce the processing cost of the one-way valve.

[0004] To achieve the above-mentioned purpose, the one-way valve proposed by the utility model comprises:

[0005] a valve body having a valve port;

[0006] The piston assembly comprises a piston head and a piston rod which are separately arranged. The piston head is movably arranged at the valve port. One end of the piston rod is passed through the valve body and connected to the piston head. The piston assembly can move axially along the valve body so that the piston head opens or closes the valve port.

[0007] In one embodiment, a countersunk hole is provided on one side of the piston head, and one end of the piston rod is inserted into the countersunk hole and has an interference fit with the countersunk hole.

[0008] In one embodiment, a first step surface is formed on an outer peripheral wall of one end of the piston rod close to the piston head, and a periphery of the counterbore abuts against the first step surface.

[0009] In one embodiment, the piston head is welded to the piston rod.

[0010] In one embodiment, the one-way valve also includes a reset member, which is sleeved on an end of the piston rod away from the piston head. The reset member has a first end and a second end relative to each other. The first end is fixed relative to the piston rod, and the second end abuts against a side of the valve body away from the piston head, so that the piston rod can elastically expand and contract within the valve body.

[0011] In one embodiment, the one-way valve further includes an abutment member, which is sleeved on an end of the piston rod away from the piston head, and the first end abuts against the abutment member.

[0012] In one embodiment, the abutment member is riveted to the piston rod.

[0013] In one embodiment, the abutment member is welded and / or interference-fitted with the piston rod.

[0014] In one embodiment, a second step surface is formed on an outer peripheral wall of an end of the piston rod away from the piston head, and the abutment member abuts against the second step surface.

[0015] In one embodiment, a limiting portion is formed on a side surface of the valve body away from the piston head, and the second end of the reset member is sleeved on an outer periphery of the limiting portion.

[0016] In one embodiment, the valve body includes a guide section and a sealing section connected to each other, the valve port is formed in the sealing section, and is flared in a direction away from the guide section.

[0017] In one embodiment, the valve body includes a valve housing, a guide sleeve and a support beam, the guide sleeve and the support beam are arranged in the guide section, the valve housing is arranged on the outer periphery of the guide sleeve, and forms a flow channel connected to the valve port with the guide sleeve, the support beam is arranged between the guide sleeve and the valve housing, and connects the guide sleeve and the valve housing, and the piston rod is passed through the guide sleeve.

[0018] In one embodiment, the one-way valve further comprises a sealing member, wherein the sealing member is disposed on an outer peripheral wall of the piston head, and when the piston head closes the valve port, the sealing member abuts against an inner wall surface of the valve port.

[0019] The utility model also provides a refrigeration device, comprising the aforementioned one-way valve.

[0020] The technical solution of the utility model adopts a separate processing method to process the piston head and the piston rod, thereby reducing the processing allowance of the piston component and thus reducing the processing cost of the one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 A schematic structural diagram of an embodiment of a one-way valve provided by the utility model;

[0023] Figure 2 A schematic structural diagram of another embodiment of the one-way valve provided by the utility model;

[0024] Figure 3 for Figure 2 A cross-sectional view of a piston assembly in FIG.

[0025] Figure 4 for Figure 2 A cross-sectional view of the valve body in FIG.

[0026] Figure 5 for Figure 4 Bottom view of the valve body in FIG.

[0027] Description of Figure Numbers:

[0028] 10. One-way valve; 100. Valve body; 200. Piston assembly; 300. Reset member; 400. Abutment member; 500. Sealing member; 110. Valve housing; 120. Guide sleeve; 130. Support beam; 140. Flow channel; 150. Sealing section; 160. Guide section; 170. Valve port; 180. Limiting portion; 210. Piston head; 211. Counterbore; 220. Piston rod; 221. First step surface; 222. Second step surface; 310. First end; 320. Second end.

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0033] The utility model provides a one-way valve.

[0034] The one-way valve proposed in the utility model can be applied to various fluid systems that need to control one-way flow, such as air conditioning systems, hydraulic systems, and pneumatic systems. The fluid medium flowing through the one-way valve is a refrigerant used for heat exchange in the air conditioning system. The fluid medium flowing through the one-way valve can also be other fluid media besides the refrigerant, such as water or oil in the hydraulic system, or gas in the pneumatic system. As long as the one-way valve can prevent backflow of the fluid medium, there is no specific limitation on this.

[0035] See also Figure 1 and Figure 3 In one embodiment of the utility model, the one-way valve 10 includes a valve body 100 and a piston assembly 200, the valve body 100 has a valve port 170; the piston assembly 200 includes a piston head 210 and a piston rod 220 which are separately arranged, the piston head 210 is movably arranged in the valve port 170, one end of the piston rod 220 is passed through the valve body 100 and connected to the piston head 210, and the piston assembly 200 can move along the axial direction of the valve body 100 so that the piston head 210 opens or closes the valve port 170.

[0036] Specifically, the valve body 100 has a valve port 170, and the valve port 170 can be set at one end of the valve body 100 in the axial direction, or can be set on the peripheral side wall of the valve body 100. Fluid can flow into the interior of the valve body 100 and flow out from the valve port 170. The piston assembly 200 can move along the axial direction of the valve body 100, and the piston assembly 200 includes a piston head 210 and a piston rod 220 that are separately arranged. The piston head 210, as a movable component, can interact with the valve port 170 to open or close the valve port 170. One end of the piston rod 220 is penetrated through the valve body 100 and connected to the piston head 210 to ensure that the movement of the piston head 210 and the piston rod 220 are synchronized. The piston rod 220 can limit the movement range of the piston head 210, and can drive the piston head 210 to close the valve port 170.

[0037] When the valve port 170 is arranged at one end of the valve body 100 in the axial direction, the piston head 210 can move toward the valve body 100 and abut against the inner wall surface of the valve port 170 to close the valve port 170; the piston head 210 can move away from the valve body 100 and form a gap with the inner wall surface of the valve port 170 to open the valve port 170, so that the one-way valve 10 can achieve control over the on-off of the fluid. When the valve port 170 is arranged on the peripheral side wall of the valve body 100, the piston head 210 can move toward one end of the valve body 100 in the axial direction so that the valve port 170 is exposed and communicated with the inside of the valve body 100 to open the valve port 170; the piston head 210 can also move toward the other end of the valve body 100 in the axial direction to cover the valve port 170, so that the valve port 170 is isolated from the inside of the valve body 100 to close the valve port 170, so that the one-way valve 10 can achieve control over the on-off of the fluid.

[0038] The piston head 210 and the piston rod 220 are separately arranged. During the processing of the piston assembly 200, compared with the method of processing the piston head 210 and the piston rod 220 as one piece, the piston head 210 and the piston rod 220 are processed separately, which reduces the processing allowance, thereby reducing the material consumption and processing cost, and greatly reducing the manufacturing and production costs.

[0039] The technical solution of the present invention uses a separate processing method to process the piston head 210 and the piston rod 220, thereby reducing the processing allowance of the piston assembly 200 and thus reducing the processing cost of the one-way valve 10.

[0040] In one embodiment, a countersunk hole 211 is provided on one side of the piston head 210 , and one end of the piston rod 220 is inserted into the countersunk hole 211 and has an interference fit with the countersunk hole 211 .

[0041] See also Figure 1 and Figure 3A countersunk hole 211 is provided on one side of the piston head 210 for inserting one end of the piston head 210. By providing the countersunk hole 211 and the interference fit of one end of the piston rod 220 with the countersunk hole 211, a tight connection is formed between the piston rod 220 and the countersunk hole 211, which increases the contact area between them and enhances the stability of the connection between the piston head 210 and the piston rod 220, thereby effectively preventing the piston head 210 and the piston rod 220 from loosening or falling off during operation.

[0042] In one embodiment, a first step surface 221 is formed on an outer peripheral wall of one end of the piston rod 220 close to the piston head 210 , and a periphery of the counterbore 211 abuts against the first step surface 221 .

[0043] See also Figure 1 and Figure 3 The outer peripheral wall of the piston rod 220 near the piston head 210 is formed with a first step surface 221. The first step surface 221 plays a positioning role. During the assembly process of the piston head 210 and the piston rod 220, it is convenient to determine the relative position of the piston head 210 and the piston rod 220, thereby facilitating the assembly between the piston head 210 and the piston rod 220. In addition, by providing the first step surface 221, the piston rod 220 has a larger contact area when connected with the piston head 210, thereby enhancing the connection stability between the piston head 210 and the piston rod 220, and further enhancing the stability and reliability of the one-way valve 10.

[0044] In one embodiment, the piston head 210 and the piston rod 220 are welded.

[0045] The piston head 210 is welded to the piston rod 220. By welding the piston head 210 and the piston rod 220, a permanent connection between the two can be achieved, ensuring that they will not become loose or fall off during the working process.

[0046] In one embodiment, the piston rod 220 is interference fit with the counterbore 211 of the piston head 210, and the piston rod 220 is welded and fixed to the piston head 210. The connection between the piston head 210 and the piston rod 220 is more firm and stable, and the connection between the piston head 210 and the piston rod 220 is further improved.

[0047] In one embodiment, the one-way valve 10 also includes a reset member 300, which is sleeved on one end of the piston rod 220 away from the piston head 210. The reset member 300 has a first end 310 and a second end 320 relative to each other. The first end 310 is fixed relative to the piston rod 220, and the second end 320 abuts against a side of the valve body 100 away from the piston head 210, so that the piston rod 220 can elastically expand and contract within the valve body 100.

[0048] See also Figure 1The piston rod 220 is inserted into the valve body 100, one end of the piston rod 220 is connected to the piston head 210, and the other end is connected to the reset member 300. The reset member 300 has a first end 310 and a second end 320 relative to each other. The first end 310 of the reset member 300 is fixed relative to the piston rod 220 to ensure that the connection between the reset member 300 and the piston rod 220 is firm and reliable, and will not loosen or fall off. The outer wall of the end of the piston rod 220 away from the piston head 210 can be formed with a protrusion for the first end 310 of the reset member 300 to abut against, so as to achieve the relative fixation between the first end 310 of the reset member 300 and the piston rod 220; the end of the piston rod 220 away from the piston head 210 can also be provided with an abutment 400 for the first end 310 of the reset member 300 to abut against; the first end 310 of the reset member 300 can also be welded with the piston rod 220 to achieve the relative fixation between the two.

[0049] The reset member 300 enables the piston rod 220 to elastically expand and contract within the valve body 100. The piston rod 220 can have a certain elastic expansion and contraction ability within the valve body 100, thereby enabling the piston head 210 to be reset, ensuring the flexibility and stability of the opening and closing of the valve port 170, and achieving accurate opening and closing operations during the fluid control process.

[0050] It is understandable that the fluid flows into the valve body 100 from the side where the reset member 300 is located. Under the action of the fluid pressure, the piston head 210 drives the piston rod 220 to move in the direction where the piston head 210 is away from the valve body 100, so that a gap is formed between the piston head 210 and the valve port 170, and the fluid can flow out from the valve port 170, thereby realizing the opening of the one-way valve 10, and the reset member 300 is compressed at this time. When the pressure of the fluid driven by the side where the reset member 300 is located disappears, the reset member 300 restores its elastic deformation, and drives the piston rod 220 to drive the piston head 210 to move in the direction where the piston head 210 is close to the valve body 100, so that the piston head 210 abuts against the inner wall surface of the valve port 170, thereby realizing the closing of the one-way valve 10.

[0051] In one embodiment, the one-way valve 10 further includes an abutment member 400 . The abutment member 400 is sleeved on an end of the piston rod 220 away from the piston head 210 , and the first end 310 abuts against the abutment member 400 .

[0052] See also Figure 1, the abutment 400 is sleeved on the end of the piston rod 220 away from the piston head 210. The setting of the abutment 400 is intended to provide additional support and fixation to achieve relative fixation between the reset member 300 and the piston rod 220. When the valve port 170 is opened, the abutment 400 can give pressure to the reset member 300 to compress the reset member 300; when the reset member 300 recovers elastic deformation, the reset member 300 can give elastic force to the abutment 400 to drive the piston rod 220 to drive the piston head 210 to reset, thereby closing the valve port 170. By setting the abutment 400, the transmission of the force between the reset member 300 and the piston rod 220 is more convenient, which is more conducive to the control of the opening and closing of the valve port 170. The abutment 400 can be a protrusion formed on the outer wall of the piston rod 220, or a gasket, or a latch, a nut, etc.

[0053] In one embodiment, the abutment member 400 is riveted to the piston rod 220 .

[0054] See also Figure 2 The end of the piston rod 220 away from the piston head 210 is provided with a riveted portion, and the riveted portion is riveted to the abutment 400, so that the abutment 400 is riveted to the end of the piston rod 220, thereby achieving a fixed connection between the abutment 400 and the piston rod 220. The abutment 400 and the piston rod 220 are fixed by adopting an outward riveting method, which can reduce the investment in welding equipment during the production process and greatly reduce the manufacturing and production costs.

[0055] In one embodiment, the abutment member 400 is welded and / or interference-fitted with the piston rod 220 .

[0056] See also Figure 1 The abutment 400 and the piston rod 220 can be connected by direct welding; or by interference fit, where the abutment 400 is sleeved on the outer periphery of the piston rod 220 and has an interference fit with the piston rod 220; or the abutment 400 and the piston rod 220 have an interference fit and are welded. By connecting the abutment 400 and the piston rod 220 by welding and / or interference fit, a tight connection between the two can be achieved, ensuring that the abutment 400 will not loosen or fall off during operation, thereby ensuring that the one-way valve 10 works normally.

[0057] In one embodiment, a second step surface 222 is formed on an outer peripheral wall of one end of the piston rod 220 away from the piston head 210 , and the abutting member 400 abuts against the second step surface 222 .

[0058] See also Figure 1 and Figure 3The outer peripheral wall of the end of the piston rod 220 away from the piston head 210 is formed with a second step surface 222, which plays a positioning role. During the assembly process of the abutment 400 and the piston rod 220, it is convenient to determine the position of the abutment 400 on the piston rod 220, so as to facilitate the abutment 400 to be quickly and accurately installed on the piston rod 220. In addition, by providing the second step surface 222, the piston rod 220 and the abutment 400 have a larger contact area, which enhances the connection stability between the abutment 400 and the piston rod 220, and further enhances the stability and reliability of the one-way valve 10.

[0059] In one embodiment, a limiting portion 180 is formed on a side of the valve body 100 away from the piston head 210 , and the second end 320 of the restoring member 300 is sleeved on the outer periphery of the limiting portion 180 .

[0060] See also Figure 1 A limiting portion 180 is formed on one side of the valve body 100 away from the piston head 210. The limiting portion 180 is used to limit the moving range of the piston assembly 200 to prevent the over-compression of the reset member 300, which will shorten the service life of the reset member 300. The second end 320 of the reset member 300 is sleeved on the outer periphery of the limiting portion 180 and abuts against the valve body 100. When the abutting member 400 compresses the reset member 300 and moves to the limit position with the piston assembly 200, the abutting member 400 abuts against the limiting member, and the limiting member can limit the abutting member 400 to the limit position, preventing the abutting member 400 and the piston assembly 200 from further moving, and preventing the reset member 300 from further compression, which will cause the reset member 300 to be over-compressed, thereby extending the service life of the reset member 300 and improving the reliability of the one-way valve 10.

[0061] In one embodiment, the valve body 100 includes a guide section 160 and a sealing section 150 connected to each other. The valve port 170 is formed in the sealing section 150 and is expanded in a direction away from the guide section 160 .

[0062] See also Figure 4 The valve body 100 includes a guide section 160 and a sealing section 150 connected to each other. The guide section 160 is used to guide the flow direction of the fluid, while the sealing section 150 is used to realize the sealing function of the piston head 210. The two work together to ensure the normal operation of the one-way valve 10. The valve port 170 is formed in the sealing section 150 and is flared in the direction away from the guide section 160. When the piston head 210 moves away from the guide section 160 along the axial direction of the valve body 100, the piston head 210 only needs to move a short distance to open the valve port 170, and the opening sensitivity of the valve port 170 is higher and faster. When the piston head 210 moves toward the guide section 160 along the axial direction of the valve body 100, the piston head 210 can achieve a line seal with the flared valve port 170 to ensure the sealing performance of the piston head 210 and the valve port 170.

[0063] In one embodiment, the valve body 100 includes a valve housing 110, a guide sleeve 120 and a support beam 130. The guide sleeve 120 and the support beam 130 are arranged in the guide section 160. The valve housing 110 is sleeved on the outer periphery of the guide sleeve 120, and forms a flow channel 140 connected to the valve port 170 with the guide sleeve 120. The support beam 130 is arranged between the guide sleeve 120 and the valve housing 110, and connects the guide sleeve 120 and the valve housing 110. The piston rod 220 is passed through the guide sleeve 120.

[0064] See also Figure 5 , the guide sleeve 120 and the support beam 130 are arranged in the guide section 160. The setting of the guide sleeve 120 and the support beam 130 is intended to provide additional support and guidance to ensure that the one-way valve 10 can operate stably and reduce vibration during operation. The valve housing 110 is sleeved on the outer periphery of the guide sleeve 120, and forms a flow channel 140 connected to the valve port 170 with the guide sleeve 120, and the fluid can flow to the valve port 170 along the flow channel 140. The support beam 130 is arranged between the guide sleeve 120 and the valve housing 110, and connects the guide sleeve 120 and the valve housing 110 to achieve fixed connection between the guide sleeve 120 and the valve housing 110 and improve the stability of the valve body 100 structure. The support beam 130 can be welded with the guide sleeve 120 and the valve housing 110; the support beam 130, the guide sleeve 120 and the valve housing 110 can also be integrally formed, which is not only simple to process, but also has a firm and stable structure.

[0065] The piston rod 220 is inserted into the guide sleeve 120, and the piston rod 220 can move along the axial direction of the guide sleeve 120, so as to prevent the piston rod 220 from shaking in the radial direction of the valve body 100, so as to ensure the stable movement of the piston rod 220 during operation. It can be understood that the end of the guide sleeve 120 away from the sealing section 150 protrudes from the end surface of the guide section 160 and forms the limiting portion 180, and the second end 320 of the reset member 300 is sleeved on the protruding part of the guide sleeve 120 and abuts against the support beam 130.

[0066] In one embodiment, the one-way valve 10 further includes a sealing member 500 , which is disposed on the outer peripheral wall of the piston head 210 . When the piston head 210 closes the valve port 170 , the sealing member 500 abuts against the inner wall surface of the valve port 170 .

[0067] See also Figure 1 , the seal 500 is arranged on the outer peripheral wall of the piston head 210. The seal 500 is used to form an effective sealing structure around the piston head 210 to prevent the fluid from leaking or flowing back when the valve port 170 is closed, thereby ensuring the sealing and stability of the one-way valve 10. When the piston head 210 closes the valve port 170, it fits tightly against the inner wall surface of the valve port 170 to form a reliable seal, preventing the fluid from passing through the gap between the piston head 210 and the inner wall of the valve port 170, which can effectively prevent the fluid from flowing back and leaking, thereby improving the safety and stability of the system.

[0068] The utility model also proposes a refrigeration device, which includes a one-way valve 10. The specific structure of the one-way valve 10 refers to the above embodiment. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0069] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A one-way valve, It is characterized in that include: a valve body having a valve port; The piston assembly comprises a piston head and a piston rod which are separately arranged. The piston head is movably arranged at the valve port. One end of the piston rod is passed through the valve body and connected to the piston head. The piston assembly can move axially along the valve body so that the piston head opens or closes the valve port.

2. The one-way valve according to claim 1, It is characterized in that A countersunk hole is provided on one side of the piston head, and one end of the piston rod is inserted into the countersunk hole and has an interference fit with the countersunk hole.

3. The one-way valve according to claim 2, It is characterized in that A first step surface is formed on the outer peripheral wall of one end of the piston rod close to the piston head, and the periphery of the counterbore abuts against the first step surface.

4. The one-way valve according to claim 1, It is characterized in that The piston head is welded to the piston rod.

5. The one-way valve according to claim 1, It is characterized in that The one-way valve also includes a reset member, which is sleeved on an end of the piston rod away from the piston head. The reset member has a first end and a second end opposite to each other. The first end is fixed relative to the piston rod, and the second end abuts against a side of the valve body away from the piston head, so that the piston rod can elastically expand and contract within the valve body.

6. The one-way valve according to claim 5, It is characterized in that The one-way valve further comprises an abutment member, wherein the abutment member is sleeved on an end of the piston rod away from the piston head, and the first end abuts against the abutment member.

7. The one-way valve according to claim 6, It is characterized in that The abutment member is riveted to the piston rod; or, The abutment member is welded and / or interference-fitted with the piston rod.

8. The one-way valve according to claim 6, It is characterized in that A second step surface is formed on the outer peripheral wall of the piston rod at one end away from the piston head, and the abutment member abuts against the second step surface.

9. The one-way valve according to claim 6, It is characterized in that A limiting portion is formed on a side of the valve body away from the piston head, and the second end of the reset member is sleeved on the outer periphery of the limiting portion.

10. The one-way valve according to claim 1, It is characterized in that The valve body comprises a guide section and a sealing section connected to each other. The valve port is formed in the sealing section and is in a flared shape in a direction away from the guide section.

11. The one-way valve according to claim 10, It is characterized in that The valve body includes a valve shell, a guide sleeve and a support beam. The guide sleeve and the support beam are arranged on the guide section. The valve shell is arranged on the outer periphery of the guide sleeve and forms a flow channel connected to the valve port with the guide sleeve. The support beam is arranged between the guide sleeve and the valve shell and connects the guide sleeve and the valve shell. The piston rod is passed through the guide sleeve.

12. The one-way valve according to claim 10, It is characterized in that The one-way valve further comprises a sealing member, which is arranged on the outer peripheral wall of the piston head. When the piston head closes the valve port, the sealing member abuts against the inner wall surface of the valve port.

13. A refrigeration device, It is characterized in that Comprising a one-way valve as claimed in any one of claims 1 to 12.

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