One-way valve for air conditioner pipe

Abstract

The one-way valve comprises a valve body and a core body assembly, a valve cavity is formed in the valve body, the core body assembly is located in the valve cavity, the core body assembly comprises an outer core body and an inner core body, the outer side of the head of the outer core body is cylindrical, a cavity matched with the inner core body is arranged in the outer core body, and a guide frame is arranged at the tail of the outer core body. The outer side face of the head of the inner core body is matched with the inner side face of the outer core body tail guide frame, a limiting check ring is arranged at the rear end of the outer core body tail guide frame, a guide rod is arranged at the tail of the inner core body, the tail of the guide rod penetrates through the limiting check ring, and a spring is arranged between the rear end of the head of the inner core body and the limiting check ring. An inner core body sealing ring is arranged on the outer side face of the inner core body head, and an outer core body sealing ring is arranged on the outer side face of the outer core body head. The design that the inner core body and the outer core body are combined to form the core body assembly is adopted, the structure of an inner cavity of the valve body is greatly reduced, and the machining difficulty and the assembling speed are reduced.

Description

Technical Field

[0001] The utility model relates to the subdivided field of one-way valve parts in automobile air-conditioning pipes, in particular to a one-way valve for air-conditioning pipes. Background Art

[0002] With the popularization of new energy vehicle models, due to the change in power of new energy vehicle models, there is no traditional heat source components such as engines, so in winter it is necessary to heat the passenger compartment and battery pack through electric heating; this has also made the heat pump system widely popular among major OEMs and new car-making forces.

[0003] Compared with traditional automobile air conditioners, heat pump systems have added many valves, sensors and other controllers, and the flow of refrigerant is no longer fixed. Different working conditions require precise control of the flow direction and flow of refrigerant. Therefore, the one-way valve, as an indispensable part, plays an important role in placing refrigerant reflux on the critical path in the entire heat pump air conditioning system. With the increase in the use of one-way valves, the existing one-way valves cannot meet the needs of enterprises, and a new one-way valve for air conditioning pipes needs to be designed. Utility Model Content

[0004] The utility model aims to provide a one-way valve for air-conditioning pipes which is suitable for air-conditioning pipes and can fully adapt to the needs of mainstream pipe diameters and meet the requirements of a one-way valve with simple structure, maintenance-free and high reliability.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A one-way valve for air-conditioning pipes comprises a valve body and a core assembly, wherein the valve body is provided with a valve cavity, the core assembly is located in the valve cavity, the core assembly comprises an outer core and an inner core, the outer side of the head of the outer core is cylindrical, and a cavity matching with the inner core is provided inside the outer core, a guide frame is provided at the tail of the outer core, the outer side surface of the head of the inner core matches with the inner side surface of the guide frame at the tail of the outer core, a limit retaining ring is provided at the rear end of the guide frame at the tail of the outer core, a guide rod is provided at the tail of the inner core, the tail of the guide rod passes through the limit retaining ring, a spring is provided between the rear end of the inner core head and the limit retaining ring, an inner core sealing ring is provided on the outer side surface of the head of the inner core, and an outer core sealing ring is provided on the outer side surface of the head of the outer core.

[0007] Furthermore, the outer core body and the inner core body are both made of nylon PA66, and the outer core body sealing ring and the inner core body sealing ring are both made of rubber HNBR material.

[0008] Furthermore, the guide frame includes a plurality of rods, and grooves for installing limit retaining rings are provided at the tail ends of the plurality of rods.

[0009] Furthermore, the inner core head includes a cylinder and a frustum at the front end of the cylinder, an inner core sealing ring groove is provided between the frustum and the cylinder for installing the inner core sealing ring, and a conical surface matching the inner core frustum is provided at the rear end of the outer core head cavity.

[0010] Furthermore, the limit retaining ring includes an outer ring, an inner ring, and a plurality of radial strips connecting the outer ring and the inner ring.

[0011] The core assembly of the utility model realizes the seal between the core assembly and the valve body through the outer core sealing ring. Inside the core assembly, the inner core and the inner core sealing ring can move inward along the axial direction under the action of the spring and the limit retaining ring, and the passage and closed circuit of the inner core and the outer core are realized by the change of the compression rate of the inner core sealing ring. The utility model patent uses PA66 nylon material as the main material of the inner core and the outer core. Compared with the metal core used in the commercially available one-way valve, it has the advantages of low cost, low weight, low noise, high processing efficiency, high reliability, etc. The design of the inner core and the outer core combined into the core assembly used in the utility model can greatly reduce the structure of the inner cavity of the valve body. It only needs to process a step limit in the inner cavity of the valve body, which greatly reduces the difficulty of machining and assembly speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of a one-way valve.

[0013] Figure 2 This is a disassembly diagram of the one-way valve.

[0014] Figure 3 It is a cross-sectional view of the one-way valve core body.

[0015] Figure 4 This is a schematic diagram of the disassembly of the one-way valve core body. DETAILED DESCRIPTION

[0016] The following is a preferred embodiment of the present invention in conjunction with the accompanying drawings, and is described in detail to enable a better understanding of the structural features of the present invention.

[0017] like Figure 1 and Figure 2 As shown, a one-way valve part for air conditioning pipes includes a valve body 1 and a core assembly 2. A flow hole is provided in the valve body 1, and a step portion 4 is provided in the flow hole. The rear side of the step portion forms a valve cavity. The core assembly 2 is located in the valve cavity. The step portion is used to limit the core assembly 2. A sealing ring 3 is provided on the outside of the core assembly for radial sealing.

[0018] like Figure 3 and Figure 4As shown, the core assembly 2 includes an outer core 21 and an inner core 22. The outer side of the head of the outer core 21 is cylindrical, and a cavity matching the inner core is arranged inside. A guide frame is arranged at the tail of the outer core. The outer side surface of the head of the inner core matches the inner side surface of the guide frame at the tail of the outer core. A limit retaining ring 26 is arranged at the rear end of the guide frame at the tail of the outer core. A guide rod is arranged at the tail of the inner core. The tail of the guide rod passes through the limit retaining ring, and a spring 25 is arranged between the rear end of the head of the inner core and the limit retaining ring. An inner core sealing ring 24 is arranged on the outer side surface of the head of the inner core, and an outer core sealing ring 23 is arranged on the outer side surface of the head of the outer core. The outer core 1 and the inner core 2 are both made of nylon PA66, and the outer core sealing ring 3 and the inner core sealing ring 4 are both made of rubber HNBR. The spring 5 and the limit retaining ring 6 are combined to form a core assembly by assembly.

[0019] In this embodiment, if Figure 4 As shown, the guide frame includes a plurality of rods, and a groove 27 for installing a limit retaining ring 26 is provided at the tail end of the plurality of rods. The head of the inner core 22 includes a cylinder and a truncated cone body located at the front end of the cylinder, and an inner core sealing ring groove 28 is provided between the truncated cone body and the cylinder for installing the inner core sealing ring. The rear end of the head cavity of the outer core 21 is provided with a conical surface that cooperates with the inner core truncated cone body. The limit retaining ring includes an outer ring, an inner ring, and a plurality of radial strips connecting the outer ring and the inner ring, wherein the outer ring is embedded in the groove at the tail end of the rod of the outer core guide frame, and the inner ring is used to penetrate the inner core guide rod. A platform 29 is provided on one side of the tail of the inner core guide rod, and a plane corresponding to the platform is provided on the inner side of the inner ring. The length of the platform is determined according to the stroke of the one-way valve.

[0020] The utility model is mainly divided into two parts. The first part is the design of the valve body and the core assembly, which mainly prevents the refrigerant from overflowing from the assembly gap between the valve body and the core assembly by forming a radial seal structure through the outer core seal ring installed on the one-way valve core assembly and the valve body inner cavity compression seal ring. The second part is the design of the one-way valve core assembly, which mainly forms a flow and cut-off working condition in the one-way valve core assembly through the driving force of the inner core under the action of the spring and the refrigerant pressure to realize the main function of the one-way valve.

[0021] Its working principle is as follows: the refrigerant flows in from the left side, and the pressure pushes the inner core 22 to move to the right along the guide rod passing through the limit retaining ring 26 at its tail, thereby invalidating the sealing structure formed by the inner core 22 and the inner core sealing ring 24 and the outer core 21, so that the refrigerant can flow from left to right through the one-way valve to operate in the circulation condition; when the refrigerant flow rate is less than the opening force, the inner core 22 is pushed to move to the left along the guide rod passing through the limit retaining ring 26 at its tail by the elastic force of the spring 25, so that the inner core 22 and the inner core sealing ring 24 and the outer core 21 re-form a sealing structure, so that the refrigerant stops flowing and forms a cut-off condition; when the refrigerant flows in from the right side, the pressure pushes the inner core 22 and the inner core sealing ring 24 and the outer core 21 to continue to maintain the sealing structure, forming a cut-off condition.

[0022] The above only expresses the implementation mode of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A one-way valve for air conditioning pipe, comprising a valve body and a core assembly, characterized in that: A valve cavity is provided in the valve body, and the core body assembly is located in the valve cavity. The core body assembly includes an outer core body and an inner core body. The outer side of the head of the outer core body is cylindrical, and a cavity matching with the inner core body is provided inside. A guide frame is provided at the tail of the outer core body, and the outer side surface of the head of the inner core body matches with the inner side surface of the guide frame at the tail of the outer core body. A limit retaining ring is provided at the rear end of the guide frame at the tail of the outer core body, and a guide rod is provided at the tail of the inner core body. The tail of the guide rod passes through the limit retaining ring, and a spring is provided between the rear end of the head of the inner core body and the limit retaining ring, an inner core sealing ring is provided on the outer side surface of the head of the inner core body, and an outer core sealing ring is provided on the outer side surface of the head of the outer core body.

2. The one-way valve for air conditioning pipe according to claim 1, characterized in that: The outer core and the inner core are both made of nylon PA66, and the outer core sealing ring and the inner core sealing ring are both made of HNBR material.

3. The one-way valve for air conditioning pipe according to claim 1, characterized in that: The guide frame comprises a plurality of rods, and grooves for installing limit retaining rings are arranged at the tail ends of the plurality of rods.

4. The one-way valve for air conditioning pipe according to claim 1, characterized in that: The inner core head includes a cylinder and a frustum at the front end of the cylinder. An inner core sealing ring groove is provided between the frustum and the cylinder for installing the inner core sealing ring. The rear end of the outer core head cavity is provided with a conical surface that cooperates with the inner core frustum.

5. The one-way valve for air conditioning pipe according to claim 1, characterized in that: The limit retaining ring comprises an outer ring, an inner ring and a plurality of radial strips connecting the outer ring and the inner ring.

6. The one-way valve for air conditioning pipe according to any one of claims 1 to 5, characterized in that: A flow hole is arranged in the valve body, a step portion is arranged in the flow hole, a valve cavity is formed at the rear side of the step portion, and the core assembly is located in the valve cavity.

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