Air conditioner pipeline check valve assembly

Abstract

The utility model discloses a kind of air conditioner pipeline check valve assemblies, including sealing ring, valve core, valve core baffle and valve seat, the valve seat is hollow cylinder structure, left side end of valve seat is refrigerant inlet end, right side end is refrigerant outlet end, internal formation valve cavity, the valve core can be axially mobile and be arranged in valve cavity, and spring is arranged in valve core, the spring provides pre-tightening force to valve core towards inlet end, so that valve core seals inlet end when no positive pressure difference, the sealing ring is arranged in the sealing end surface groove of the valve core, for realizing sealing when valve core is closed, the valve core baffle is fixedly arranged in valve cavity and located between valve core and outlet end, flow-through hole for refrigerant is provided on valve core baffle, and the utility model can satisfy automobile air conditioning system for preventing refrigerant from backflow when compressor stops or system pressure changes, ensure normal operation of system, improve energy efficiency.

Description

Technical Field

[0001] This utility model relates to a one-way valve assembly for air conditioning pipelines, belonging to the field of air conditioning pipeline flow control. Background Technology

[0002] Currently, in automotive air conditioning piping systems, the one-way valve assembly is a core component, used to prevent refrigerant backflow when the compressor stops or system pressure changes, ensuring normal system operation and improving energy efficiency. Existing one-way valves suffer from problems such as complex structure, cumbersome assembly, insufficient sealing reliability, or insensitive opening and closing under high pressure differentials. Therefore, it is necessary to provide a one-way valve assembly with a more optimized structure and more reliable performance. Summary of the Invention

[0003] The purpose of this invention is to effectively overcome the above-mentioned defects and provide a one-way valve assembly for air conditioning pipelines that is compact in structure, reliable in sealing, sensitive in opening and closing response, and easy to assemble.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a one-way valve assembly for an air conditioning pipeline, characterized in that it includes a sealing ring, a valve core, a valve core baffle, and a valve seat. The valve seat is a hollow cylindrical structure, with the left end of the valve seat being the refrigerant inlet end and the right end being the refrigerant outlet end, forming a valve cavity inside. The valve core is axially movable and disposed within the valve cavity, and a spring is disposed within the valve core. The spring provides a preload force to the valve core toward the inlet end, so that the valve core seals the inlet end when there is no positive pressure difference. The sealing ring is disposed in the groove of the sealing end face of the valve core to achieve sealing when the valve core is closed. The valve core baffle is fixedly disposed within the valve cavity and located between the valve core and the outlet end, and a flow hole for refrigerant to pass through is provided on the valve core baffle.

[0005] Furthermore, the refrigerant inlet sealing end face of the valve seat is a conical surface, which cooperates with the valve core sealing end face and the sealing ring to form a seal.

[0006] Furthermore, the valve core includes a movable valve core part and a fixed valve core part. One end of the movable valve core part serves as a sealing end face, and the other end is movably nested on the fixed valve core part. One end of the fixed valve core part is connected to the movable valve core part, and the other end is connected to the valve core baffle.

[0007] Furthermore, one end of the spring is disposed inside the movable part of the valve core, and the other end is disposed inside the fixed part of the valve core, and the spring provides preload force to the movable part and the fixed part of the valve core.

[0008] Furthermore, the valve core baffle has a positioning through hole at its center that cooperates with the valve core fixing part and restricts the rotation of the valve core.

[0009] Furthermore, a retaining ring is provided on the outlet side of the valve core baffle. The retaining ring is located in an annular groove on the inner wall of the valve seat and is used to axially limit and fix the valve core baffle.

[0010] Furthermore, a pin is provided on the end face of the refrigerant inlet end of the valve seat to prevent misalignment when the one-way valve assembly is assembled into the refrigerant inlet end and refrigerant outlet end of the air conditioning piping system.

[0011] Furthermore, the valve seat refrigerant inlet end face is provided with an anti-misalignment hole.

[0012] Furthermore, the valve seat has an inlet end pressure plate assembly threaded hole on the refrigerant inlet end face and an outlet end pressure plate assembly threaded hole on the refrigerant outlet end face.

[0013] Furthermore, the valve seat is made of aluminum profile, and the valve core and valve core baffle are made of engineering plastic or metal materials.

[0014] The beneficial effects of this utility model are as follows: This utility model is used in automotive air conditioning piping systems. Through the combination of valve seat, valve core, spring, baffle, and snap ring, it achieves an integrated design of a one-way valve, resulting in a small size and easy installation in the piping. This utility model uses an independent sealing ring that cooperates with the valve core or valve port, ensuring effective prevention of refrigerant backflow even under system pressure fluctuations, resulting in a good sealing effect. This utility model utilizes a snap ring to limit the valve core baffle and uses pins for positioning, making the assembly sequence of internal components clear, reliable, and facilitating automated production and maintenance. The materials selected for each component in this utility model are reasonable, adaptable to the working environment and temperature and pressure changes of refrigerant and lubricating oil within the air conditioning system, resulting in a long service life. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the one-way valve assembly for the air conditioning pipeline of this utility model in the closed state.

[0016] Figure 2 This is a cross-sectional view of the one-way valve assembly for the air conditioning pipeline of this utility model in the open state.

[0017] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0018] The markings in the diagram are as follows: 1-Sealing ring, 2-Valve core, 21-Valve core movement, 22-Valve core fixing part, 3-Spring, 4-Valve core baffle, 5-Snap ring, 6-Valve seat, 7-Pin, 8-Inlet end pressure plate assembly threaded hole, 9-Anti-misalignment hole, 10-Outlet end pressure plate assembly threaded hole, 11-Refrigerant inlet end, 12-Refrigerant outlet end, 13-Sealing annular valve port, 14-Annular groove, 15-Flow hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 The present invention provides an air conditioning pipeline one-way valve assembly, which mainly includes a valve seat 6, a valve core 2, a spring 3, a valve core baffle 4, a snap ring 5, a sealing ring 1, and a pin 7.

[0021] The valve seat 6 is a cylindrical structure that extends through both ends, typically made of 6061 aluminum profile. Its left end (as shown in the diagram) is the refrigerant inlet 11, and its right end is the refrigerant outlet 12. The inlet end 11 is machined to form a precise annular valve port 13. The inner wall of the valve seat 6 also has an annular groove 14 machined into it.

[0022] The valve core 2 is typically made of engineering plastic or lightweight metal, and its left end face has a groove for installing a sealing ring, which is made of refrigerant-resistant rubber. The valve core 2 can slide axially within the valve cavity inside the valve seat 6 under external force. The valve core includes a movable part 21 and a fixed part 22. One end of the movable part 21 serves as a sealing end face, and the other end is movably nested on the fixed part 22. One end of the fixed part 22 is connected to the movable part, and the other end is connected to the valve core baffle 4.

[0023] Spring 3 is located inside valve core 2. In its natural state, the elastic force of spring 3 pushes the movable part of valve core to the left, causing sealing ring 1 to press against the annular valve port 13, forming a sealed closed state (e.g., Figure 1 (As shown).

[0024] The valve core baffle 4 is a disc-shaped component with multiple flow holes 15 for refrigerant to pass through. The valve core baffle 4 is inserted into the valve cavity from the refrigerant outlet end 12 of the valve seat 6, and then fixed by a retaining spring 5. The retaining spring 5 is located in an annular groove 14 on the inner wall of the valve seat.

[0025] In addition, a pin 7, an anti-misalignment hole 9, and an inlet end pressure plate assembly threaded hole 8 are provided on the end face of the refrigerant inlet end of the valve seat 6; and an outlet end pressure plate assembly threaded hole 10 is provided on the end face of the refrigerant outlet end of the valve seat 6.

[0026] During assembly of this one-way valve assembly, first place the valve core 2 and spring 3 into the valve seat 1, and then place the valve core baffle 4. Finally, insert the retaining ring 5 into the annular groove 14 on the inner wall of the valve seat 1 to axially fix the valve core baffle 4. At this time, the spring 3 is compressed, providing preload.

[0027] When this one-way valve assembly is working, when the pressure at the refrigerant inlet 11 is higher than the pressure at the refrigerant outlet 12 (i.e., there is a positive pressure difference) and overcomes the preload force of the spring 3, the valve core 2 moves to the right, disengaging from the annular valve port 13. The refrigerant then flows through the annular valve port 13, the space around the valve core 2, and the flow hole 15 of the valve core baffle 4 to the refrigerant outlet 12 (e.g., ...). Figure 2 (As shown). When the positive pressure difference disappears or a reverse pressure difference occurs, the spring 3 pushes the valve core 2 to reset, and the sealing ring 1 re-seals the annular valve port 13 to prevent backflow.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit the scope of protection of this utility model in any way, and all technical solutions obtained by equivalent substitution or other means fall within the scope of protection of this utility model. Parts not covered by this utility model are the same as or can be implemented using existing technology.

Claims

1. A one-way valve assembly for an air conditioning pipeline, characterized in that, The device includes a sealing ring, a valve core, a valve core baffle, and a valve seat. The valve seat is a hollow cylindrical structure with a refrigerant inlet on the left side and a refrigerant outlet on the right side, forming a valve cavity inside. The valve core is axially movable within the valve cavity and contains a spring that provides a preload force towards the inlet, ensuring the valve core seals the inlet when there is no positive pressure differential. The sealing ring is located in a groove on the sealing end face of the valve core to achieve a seal when the valve core is closed. The valve core baffle is fixedly installed within the valve cavity and located between the valve core and the outlet, with a flow hole for refrigerant to pass through.

2. The one-way valve assembly for an air conditioning pipeline according to claim 1, characterized in that, The refrigerant inlet sealing end face of the valve seat is a conical surface, which cooperates with the valve core sealing end face and the sealing ring to form a seal.

3. The one-way valve assembly for an air conditioning pipeline according to claim 1, characterized in that, The valve core includes a movable part and a fixed part. One end of the movable part serves as a sealing end face, and the other end is movably nested on the fixed part. One end of the fixed part is connected to the movable part, and the other end is connected to the valve core baffle.

4. The one-way valve assembly for an air conditioning pipeline according to claim 3, characterized in that, One end of the spring is located inside the movable part of the valve core, and the other end is located inside the fixed part of the valve core. The spring provides preload force to the movable part and the fixed part of the valve core.

5. A one-way valve assembly for an air conditioning pipeline according to claim 3, characterized in that, The valve core baffle has a positioning through hole at its center that cooperates with the valve core fixing part and restricts the rotation of the valve core.

6. The one-way valve assembly for an air conditioning pipeline according to claim 1, characterized in that, A retaining ring is provided on the outlet side of the valve core baffle. The retaining ring is located in an annular groove on the inner wall of the valve seat and is used to axially limit and fix the valve core baffle.

7. The one-way valve assembly for an air conditioning pipeline according to claim 1, characterized in that, A pin is provided on the end face of the refrigerant inlet of the valve seat to prevent misalignment when the one-way valve assembly is assembled into the refrigerant inlet and refrigerant outlet of the air conditioning piping system.

8. The one-way valve assembly for an air conditioning pipeline according to claim 1, characterized in that, The valve seat refrigerant inlet end face is provided with an anti-misalignment hole.

9. A one-way valve assembly for an air conditioning pipeline according to claim 1, characterized in that, The valve seat has an inlet end pressure plate assembly threaded hole on the refrigerant inlet end face and an outlet end pressure plate assembly threaded hole on the refrigerant outlet end face.

10. A one-way valve assembly for an air conditioning pipeline according to claim 1, characterized in that, The valve seat is made of aluminum profile, and the valve core and valve core baffle are made of engineering plastic or metal materials.

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