A regulating valve for a vehicle air conditioner

Abstract

The utility model relates to the field of automobile air conditioning regulating valve, concretely is a kind of regulating valve of vehicle air conditioner, including valve body, temperature sensing diaphragm moving part and valve stem, is set with intercommunication cavity, first interface cavity, second interface cavity, third interface cavity, fourth interface cavity and fifth interface cavity on valve body, first interface cavity is connected with second interface cavity by third interface cavity, fourth interface cavity and fifth interface cavity intercommunication, by setting adjusting assembly, when needing to adjust the support spring support spring intensity of valve core, only need to rotate threaded support rod, it can change its support height with support column, and then adjust the height of lifting plate in fourth interface cavity, finally realize the accurate adjustment of support spring support intensity, can adapt to the stress demand of valve core under different working conditions, avoid the precision deviation caused by the fixed support intensity, ensure that expansion valve can accurately control valve flow according to evaporator end overheat degree change, further improve the operation stability of refrigeration system.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning regulating valve technology, specifically to a regulating valve for vehicle air conditioning. Background Technology

[0002] The control valve of a vehicle air conditioner, also known as an expansion valve, is an important component of the refrigeration system. It is generally installed between the liquid receiver and the evaporator. The expansion valve allows the medium-temperature, high-pressure liquid refrigerant to be throttled and become low-temperature, low-pressure wet vapor. Then, the refrigerant absorbs heat in the evaporator to achieve a cooling effect. The expansion valve controls the valve flow by changing the superheat at the end of the evaporator to prevent insufficient utilization of the evaporator area and knocking.

[0003] Chinese patent CN221547896U discloses a vehicle air conditioning expansion valve with good stability. It uses a shock-absorbing mechanism to reduce vibration, which can improve the stability of the expansion valve. The expansion valve is formed by the cooperation of three components: valve cover, valve body and first spring, thereby reducing the number of moving parts inside the valve body. This makes the expansion valve relatively stable even when it is affected by vibration.

[0004] In the above solution, although the valve core can be elastically supported by the spring to provide upward thrust for the valve stem, since the spring is fixed in the valve body by the spring seat, it is difficult to adjust the support strength between the spring and the valve core according to the actual needs of the valve core, resulting in accuracy deviation. In addition, when the life of the spring in the valve body reaches its limit, its replacement process is also inconvenient.

[0005] Therefore, this utility model provides a regulating valve for a vehicle air conditioner to solve the above problems. Utility Model Content

[0006] In view of the above situation and to overcome the defects of the prior art, this utility model provides a regulating valve for vehicle air conditioning, which solves the problem that since the spring is fixed in the valve body through the spring seat, it is difficult to adjust the support strength between the spring and the valve core according to the actual needs of the valve core, resulting in accuracy deviation and the inconvenience of replacing the spring when its life in the valve body reaches its limit.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A regulating valve for a vehicle air conditioner includes a valve body, a temperature-sensing diaphragm moving component, and a valve stem. The valve body has a communicating cavity, a first interface cavity, a second interface cavity, a third interface cavity, a fourth interface cavity, and a fifth interface cavity. The first interface cavity is connected to the second interface cavity through the third, fourth, and fifth interface cavities. The bottom end of the valve stem passes through the communicating cavity and the third interface cavity in sequence and is fixedly connected to a valve core. The bottom surface of the valve body has a threaded mounting hole, and a plug is threaded into the threaded mounting hole. A support column is slidably connected to the plug, and a lifting plate is fixedly connected to the support column. A spring seat is provided on the lifting plate, and a support spring is installed in the spring seat. An adjusting component for adjusting the lifting of the support column is provided on the plug.

[0009] Preferably, a first connector and a second connector are respectively installed on both sides of the valve body, and both the first connector and the second connector are connected to the communicating cavity.

[0010] Preferably, a third connector and a fourth connector are respectively installed on both sides of the valve body. The third connector is connected to the second interface cavity, and the fourth connector is connected to the first interface cavity.

[0011] Preferably, the valve core has a tapered surface, and the inner top wall of the fourth interface cavity has a tapered groove that matches the tapered surface, and the tapered groove is connected to the third interface cavity.

[0012] Preferably, a hexagonal block is fixedly connected to the bottom surface of the plug, and the hexagonal block is attached to the bottom surface of the valve body.

[0013] Preferably, the adjusting assembly includes an adjusting screw hole formed in the plug, and a threaded support rod is threadedly connected to the adjusting screw hole, with one end of the threaded support rod rotatably connected to a support column.

[0014] Preferably, the plug has a guide groove, and a guide ring is fixedly connected to the support column, with the guide ring slidably connected within the guide groove.

[0015] Preferably, the lifting plate has an installation groove, and a sealing ring is installed in the installation groove, with the sealing ring abutting against the inner wall of the fourth interface cavity.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. By setting up an adjustment component, when it is necessary to adjust the support elastic strength of the support spring on the valve core, simply rotate the threaded support rod to change its support height with the support column, thereby adjusting the height of the lifting plate in the fourth interface cavity. Ultimately, this achieves precise adjustment of the support spring's support strength, adapting to the force requirements of the valve core under different operating conditions. This avoids accuracy deviations caused by fixed support strength, ensuring that the expansion valve can accurately control the valve flow according to changes in the superheat at the evaporator end, further improving the operational stability of the refrigeration system.

[0018] 2. By rotating the hexagonal block, the plug can be screwed off from the threaded mounting hole, and the support spring can be directly removed from the fourth interface cavity to complete the replacement. There is no need to disassemble the valve body in a large way. The whole replacement process is simple and quick, which greatly reduces the workload of maintenance personnel and reduces the equipment downtime caused by maintenance, thereby indirectly reducing the maintenance cost of the vehicle air conditioning system.

[0019] 3. By designing the third interface cavity as a narrow section and the fifth interface cavity as an inclined section on the second interface cavity, when the refrigerant enters the first interface cavity from the condenser through the fourth connector, it will first undergo preliminary compression through the narrow third interface cavity, then enter the fourth interface cavity, and then undergo further compression when entering the second interface cavity through the inclined fifth interface cavity. This allows the medium-temperature and high-pressure liquid refrigerant to more fully complete the throttling and pressure reduction process, forming low-temperature and low-pressure wet vapor that is more conducive to absorbing heat in the evaporator, improving the heat exchange efficiency of the refrigerant in the evaporator, and thus enhancing the overall cooling effect of the vehicle air conditioner. Attached Figure Description

[0020] Figure 1 The three-dimensional representation of this utility model Figure 1 .

[0021] Figure 2 The three-dimensional representation of this utility model Figure 2 .

[0022] Figure 3 This is a cross-sectional view of the present invention.

[0023] Figure 4 This utility model Figure 3 An enlarged schematic diagram of the structure at point A in the middle.

[0024] In the diagram: 1. Valve body; 2. Temperature-sensing diaphragm moving part; 3. Valve stem; 4. Connecting cavity; 5. First connector; 6. Second connector; 7. First interface cavity; 8. Second interface cavity; 9. Third connector; 10. Fourth connector; 11. Third interface cavity; 12. Fourth interface cavity; 13. Fifth interface cavity; 14. Valve core; 15. Threaded mounting hole; 16. Plug; 17. Hexagonal block; 18. Adjusting screw hole; 19. Threaded support rod; 20. Guide groove; 21. Guide ring; 22. Support column; 23. Lifting plate; 24. Mounting groove; 25. Sealing ring; 26. Spring seat; 27. Support spring; 28. Conical groove; 29. ​​Conical surface. Detailed Implementation

[0025] The following will refer to the attached reference. Figures 1 to 4 The various embodiments of this utility model will be described in detail below. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0026] A regulating valve for a vehicle air conditioner includes a valve body 1, a temperature-sensing diaphragm moving part 2, and a valve stem 3. The valve body 1 has a connecting cavity 4, a first interface cavity 7, a second interface cavity 8, a third interface cavity 11, a fourth interface cavity 12, and a fifth interface cavity 13. A first connector 5 and a second connector 6 are respectively installed on both sides of the valve body 1, and both the first connector 5 and the second connector 6 are connected to the connecting cavity 4.

[0027] Connect the first connector 5 to the evaporator and the second connector 6 to the compressor, so that the gas enters the compressor from the evaporator through the first connector 5, the connecting cavity 4 and the second connector 6.

[0028] In this embodiment, a third connector 9 and a fourth connector 10 are respectively installed on the two sides of the valve body 1. The third connector 9 is connected to the second interface cavity 8, and the fourth connector 10 is connected to the first interface cavity 7.

[0029] Connect the third connector 9 to the evaporator and the fourth connector 10 to the condenser. The gas enters the evaporator from the condenser through the fourth connector 10, the first interface chamber 7, the third interface chamber 11, the fourth interface chamber 12, the fifth interface chamber 13, the second interface chamber 8, and the third connector 9.

[0030] The first interface cavity 7 is connected to the second interface cavity 8 through the third interface cavity 11, the fourth interface cavity 12 and the fifth interface cavity 13. The bottom end of the valve stem 3 passes through the connecting cavity 4 and the third interface cavity 11 in sequence and is fixedly connected to the valve core 14. The valve core 14 is provided with a conical surface 29. The inner top wall of the fourth interface cavity 12 is provided with a conical groove 28 that matches the conical surface 29, and the conical groove 28 is connected to the third interface cavity 11.

[0031] The fifth interface cavity 13 is inclined on the second interface cavity 8, and the third interface cavity 11 is a narrow section. When the gas enters the fourth interface cavity 12 from the first interface cavity 7 and the third interface cavity 11, it will be initially compressed through the third interface cavity 11, and when the gas enters the second interface cavity 8 from the fourth interface cavity 12 through the fifth interface cavity 13, it will be compressed again through the fifth interface cavity 13.

[0032] The conical groove 28 and conical surface 29 ensure the sealing of the valve core 14 to the third interface cavity 11 after it is inserted into the conical groove 28.

[0033] The valve body 1 has a threaded mounting hole 15 on its bottom surface. A plug 16 is threaded into the threaded mounting hole 15. A support column 22 is slidably connected to the plug 16. A lifting plate 23 is fixedly connected to the support column 22. A spring seat 26 is provided on the lifting plate 23. A support spring 27 is installed in the spring seat 26. An adjustment component for adjusting the lifting of the support column 22 is provided on the plug 16.

[0034] When the support spring 27 needs to be replaced, the plug 16 is screwed out of the threaded mounting hole 15 and the support spring 27 is removed from the fourth interface cavity 12 to complete the replacement of the support spring 27.

[0035] The threaded mounting hole 15 is connected to the fourth interface cavity 12, and the threaded mounting hole 15 and the fourth interface cavity 12 form a stepped mounting cavity. After the plug 16 is installed in the threaded mounting hole 15, the sealing of the fourth interface cavity 12 can be guaranteed.

[0036] The bottom surface of the plug 16 is fixedly connected to a hexagonal block 17, and the hexagonal block 17 is attached to the bottom surface of the valve body 1. The plug 16 is installed by means of the hexagonal block 17. After the plug 16 is installed in the threaded mounting hole 15, the hexagonal block 17 will be attached to the valve body 1.

[0037] In this embodiment, the adjustment component includes an adjustment screw hole 18 opened on the plug 16, and a threaded support rod 19 is threadedly connected to the adjustment screw hole 18, and one end of the threaded support rod 19 is rotatably connected to the support column 22.

[0038] When adjusting the support elastic strength of the support spring 27 on the valve core 14, the support height of the threaded support rod 19 and the support column 22 can be adjusted by rotating the threaded support rod 19, thereby adjusting the height of the lifting plate 23 in the fourth interface cavity 12, and thus adjusting the support strength of the support spring 27.

[0039] The plug 16 has a guide groove 20, and a guide ring 21 is fixedly connected to the support column 22. The guide ring 21 is slidably connected in the guide groove 20. The movement of the support column 22 can be guided by the guide groove 20 and the guide ring 21.

[0040] The lifting plate 23 has an installation groove 24, and a sealing ring 25 is installed in the installation groove 24. The sealing ring 25 abuts against the inner wall of the fourth interface cavity 12. The sealing performance between the lifting plate 23 and the fourth interface cavity 12 is improved by the sealing ring 25 abutting against the fourth interface cavity 12.

[0041] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A regulating valve for a vehicle air conditioner, comprising a valve body (1), a temperature-sensing diaphragm moving part (2), and a valve stem (3), characterized in that, The valve body (1) is provided with a connecting cavity (4), a first interface cavity (7), a second interface cavity (8), a third interface cavity (11), a fourth interface cavity (12) and a fifth interface cavity (13). The first interface cavity (7) is connected to the second interface cavity (8) through the third interface cavity (11), the fourth interface cavity (12) and the fifth interface cavity (13). The bottom end of the valve stem (3) passes through the connecting cavity (4) and the third interface cavity (11) in sequence and is fixedly connected to the valve core (14). The bottom surface of the valve body (1) is provided with a threaded mounting hole (15). A plug (16) is threadedly connected in the threaded mounting hole (15). A support column (22) is slidably connected on the plug (16). A lifting plate (23) is fixedly connected on the support column (22). A spring seat (26) is provided on the lifting plate (23). A support spring (27) is installed in the spring seat (26). An adjustment component for adjusting the lifting of the support column (22) is provided on the plug (16).

2. The regulating valve for a vehicle air conditioner according to claim 1, characterized in that, The valve body (1) is equipped with a first connector (5) and a second connector (6) on its two sides, and both the first connector (5) and the second connector (6) are connected to the communicating cavity (4).

3. The regulating valve for a vehicle air conditioner according to claim 1, characterized in that, The valve body (1) is equipped with a third connector (9) and a fourth connector (10) on its two sides respectively. The third connector (9) is connected to the second interface cavity (8), and the fourth connector (10) is connected to the first interface cavity (7).

4. The regulating valve for a vehicle air conditioner according to claim 1, characterized in that, The valve core (14) has a conical surface (29), and the inner top wall of the fourth interface cavity (12) has a conical groove (28) that matches the conical surface (29), and the conical groove (28) is connected to the third interface cavity (11).

5. The regulating valve for a vehicle air conditioner according to claim 1, characterized in that, The bottom surface of the plug (16) is fixedly connected to a hexagonal block (17), and the hexagonal block (17) is attached to the bottom surface of the valve body (1).

6. The regulating valve for a vehicle air conditioner according to claim 1, characterized in that, The adjustment assembly includes an adjustment screw hole (18) opened on the plug (16), and a threaded support rod (19) is threadedly connected to the adjustment screw hole (18), and one end of the threaded support rod (19) is rotatably connected to the support column (22).

7. The regulating valve for a vehicle air conditioner according to claim 1, characterized in that, The plug (16) has a guide groove (20) inside, and a guide ring (21) is fixedly connected to the support column (22), and the guide ring (21) is slidably connected in the guide groove (20).

8. The regulating valve for a vehicle air conditioner according to claim 1, characterized in that, The lifting plate (23) is provided with an installation groove (24), and a sealing ring (25) is installed in the installation groove (24), and the sealing ring (25) abuts against the inner wall of the fourth interface cavity (12).

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