Charging valve for new energy automobile air conditioner

Abstract

The utility model provides a new energy automobile air conditioner filling valve which comprises a valve body and a valve element located in the valve body, one end of the valve body is further provided with a branch pipe used for outputting refrigerants, the filling valve further comprises a pressure relief assembly, the pressure relief assembly comprises a pressure relief cover, a base, an air inlet pipe, an air outlet pipe and a valve shaft, and the pressure relief cover and the base are fixedly installed on the top of the valve body respectively. A valve plate is fixedly connected to the base, one end of the air inlet pipe penetrates into the base and is located at a through groove of the valve plate, the other end of the air inlet pipe penetrates into a cavity of the valve body, an air outlet pipe and a valve shaft penetrate through the top of the pressure relief cover, and a cavity of the air outlet pipe is communicated with the cavity in the pressure relief cover. The valve shaft is located in the center of the pressure relief cover and movably connected with the pressure relief cover through the bearing, the fixing rod is located on one side of the valve shaft, high-pressure refrigerants are discharged through the air inlet pipe, the through groove, the pressure relief cover and the air outlet pipe, internal pressure is reduced, residual refrigerants are discharged in time, the valve body is far away from the air outlet pipe, and it is avoided that the residual refrigerants are sprayed out and extremely prone to frostbite workers.

Description

Technical Field

[0001] This utility model relates to the field of filling valves, and in particular to a filling valve for air conditioning in new energy vehicles. Background Technology

[0002] New energy vehicle air conditioning systems typically use carbon dioxide as a refrigerant. However, carbon dioxide has a high critical pressure and a low critical temperature, which makes it difficult to use as a refrigerant. Whether using subcritical or transcritical cycles, the operating pressure of air conditioning systems using carbon dioxide as a refrigerant (up to 17 MPa) is higher than that of traditional refrigeration and air conditioning systems (up to 3 MPa).

[0003] Currently, a pressure device is installed between the valve core and the valve body. The valve core of the valve body is automatically opened and closed by balancing the pressure of the pressure device and the pressure inside the refrigerant tank. However, after the refrigerant charging work is completed, there is still refrigerant inside the valve body. When the valve is disconnected from the charging pipeline, the residual refrigerant can spray out and easily cause frostbite to the staff, posing a safety hazard.

[0004] Therefore, it is necessary to provide a new charging valve for air conditioning in new energy vehicles to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a charging valve for air conditioning in new energy vehicles.

[0006] The charging valve for air conditioning in new energy vehicles provided by this utility model includes a valve body and a valve core located inside the valve body. One end of the valve body is also provided with a branch pipe for refrigerant output. It also includes a pressure relief assembly, which includes a pressure relief cover, a base, an inlet pipe, an outlet pipe, and a valve shaft. The pressure relief cover and the base are respectively fixedly installed on the top of the valve body. A valve plate is fixedly connected to the base. A through groove is opened on the valve plate. One end of the inlet pipe is inserted into the base and located at the through groove of the valve plate. The other end of the inlet pipe is inserted into the cavity of the valve body. The top of the pressure relief cover is respectively penetrated by the outlet pipe and the valve shaft. The cavity of the outlet pipe is connected to the cavity inside the pressure relief cover. The valve shaft is located at the center of the pressure relief cover and is movably connected to the pressure relief cover through a bearing. A fixing rod is fixedly connected to the top of the pressure relief cover. The fixing rod is located on one side of the valve shaft.

[0007] Furthermore, the bottom end of the valve shaft is provided with a baffle corresponding to the valve plate through groove in the circumferential direction. The baffle fits against the top of the valve plate through groove. The top end of the valve shaft is provided with a handle in the circumferential direction. A movable ring is sleeved on the outer surface of the handle. A spring is fixedly connected to one side of the movable ring. The other end of the spring is fixedly connected to one side of the fixed rod.

[0008] Furthermore, the valve core includes a telescopic valve stem, a valve plug for sealing or opening the inner cavity of the branch pipe, and two opposing positioning rods. The telescopic valve stem is fixedly installed on the top wall of the valve body, and the bottom end of the telescopic valve stem is fixedly connected to the valve plug. The edge of the valve plug fits against the inside of the valve body. The two positioning rods are fixedly installed on the inner wall of the valve body, and the bottom ends of the two positioning rods pass through the valve plug. There is a gap between the outer surface of the two positioning rods and the through hole opened in the valve plug, and a sealing plate is also provided at the bottom of the two positioning rods.

[0009] Furthermore, the pressure relief cover and the base are sealed together by a sealing ring.

[0010] Furthermore, a filter screen is provided inside the valve body, and the filter screen is fitted to the inlet of the air intake pipe.

[0011] Furthermore, the sealing plate is larger than the through hole opened by the valve plug.

[0012] Compared with related technologies, the charging valve for air conditioning in new energy vehicles provided by this utility model has the following beneficial effects:

[0013] This utility model provides a charging valve for air conditioning in new energy vehicles. In specific implementation, when the internal pressure of the valve body exceeds the set value, the valve shaft is manually rotated, the baffle is disengaged from the top of the valve plate groove, the air inlet pipe is connected to the pressure relief cover, and the high-pressure refrigerant is discharged through the air inlet pipe → groove → pressure relief cover → air outlet pipe, reducing the internal pressure and timely discharging the residual refrigerant. The valve body and the air outlet pipe are far apart to avoid the residual refrigerant spraying out, which could easily cause frostbite to the staff. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of the charging valve for air conditioning in new energy vehicles provided by this utility model;

[0015] Figure 2 A cross-sectional structural schematic diagram of the charging valve for air conditioning in new energy vehicles provided by this utility model;

[0016] Figure 3 for Figure 2 The enlarged structural diagram at point A is shown below;

[0017] Figure 4 for Figure 2 The enlarged structural diagram at point B is shown.

[0018] The following are the labels in the diagram: 1. Valve body; 2. Branch pipe; 3. Pressure relief cover; 4. Base; 5. Inlet pipe; 6. Outlet pipe; 7. Valve shaft; 8. Valve plate; 9. Fixing rod; 10. Baffle; 11. Handle; 12. Moving ring; 13. Spring; 14. Telescopic valve stem; 15. Valve plug; 16. Positioning rod; 17. Sealing plate; 18. Filter screen. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Please refer to the following: Figure 1 , Figure 2 , Figure 3 as well as Figure 4 ,in, Figure 1 A schematic diagram of the overall structure of the charging valve for air conditioning in new energy vehicles provided by this utility model; Figure 2 A cross-sectional structural schematic diagram of the charging valve for air conditioning in new energy vehicles provided by this utility model; Figure 3 for Figure 2 The enlarged structural diagram at point A is shown below; Figure 4 for Figure 2 The enlarged structural diagram at point B is shown.

[0021] In the specific implementation process, such as Figures 1-4 As shown, the charging valve for air conditioning in new energy vehicles includes a valve body 1 and a valve core located inside the valve body 1. One end of the valve body 1 is also provided with a branch pipe 2 for refrigerant output. It also includes a pressure relief assembly, which includes a pressure relief cover 3, a base 4, an inlet pipe 5, an outlet pipe 6, and a valve shaft 7. The pressure relief cover 3 and the base 4 are respectively fixedly installed on the top of the valve body 1. A valve plate 8 is fixedly connected to the base 4. A through groove is opened on the valve plate 8. One end of the inlet pipe 5 is inserted into the base 4 and located at the through groove of the valve plate 8. The other end of the inlet pipe 5 is inserted into the valve shaft 7. Inside the cavity of body 1, the top of the pressure relief cover 3 is respectively connected to the air outlet pipe 6 and the valve shaft 7. The cavity of the air outlet pipe 6 is connected to the cavity inside the pressure relief cover 3. The valve shaft 7 is located at the center of the pressure relief cover 3 and is movably connected to the pressure relief cover 3 through the bearing. The top of the pressure relief cover 3 is fixedly connected to the fixing rod 9, which is located on one side of the valve shaft 7. The pressure relief cover 3 and the base 4 are sealed together by the sealing ring. The valve body 1 is also equipped with a filter screen 18. The filter screen 18 is attached to the inlet of the air inlet pipe 5. Before the refrigerant enters the cavity of the valve body 1, it needs to be filtered by the filter screen 18.

[0022] It should be noted that the bottom end of the valve shaft 7 is provided with a baffle 10 in the circumferential direction, which corresponds to the through groove of the valve plate 8. The baffle 10 fits against the top of the through groove of the valve plate 8. The top end of the valve shaft 7 is provided with a handle 11 in the circumferential direction. A movable ring 12 is fitted on the outer surface of the handle 11. A spring 13 is fixedly connected to one side of the movable ring 12. The other end of the spring 13 is fixedly connected to one side of the fixed rod 9. The baffle 10 of the valve shaft 7 fits tightly against the top of the through groove of the valve plate 8, blocking the communication path between the air intake pipe 5 and the pressure relief cover 3. The refrigerant flows only through the gap between the valve plug 15 of the valve core and the valve body 1. When the internal pressure of the valve body 1 exceeds the set value, the valve shaft 7 is manually rotated (by operating the lever 11). The baffle 10 is disengaged from the top of the through groove of the valve plate 8, and the air inlet pipe 5 is connected to the pressure relief cover 3. The high-pressure refrigerant is discharged through the air inlet pipe 5 → through groove → pressure relief cover 3 → air outlet pipe 6, reducing the internal pressure. After rotating the valve shaft 7, the lever 11 is released, and the spring 13 pulls the valve shaft 7 back to the initial position through the movable ring 12, closing the pressure relief channel again.

[0023] In one specific implementation, the valve core includes a telescopic valve stem 14, a valve plug 15 for sealing or opening the inner cavity of the branch pipe 2, and two opposing positioning rods 16. The telescopic valve stem 14 is fixedly installed on the top wall of the valve body 1, and its bottom end is fixedly connected to the valve plug 15. The edge of the valve plug 15 fits against the inside of the valve body 1. The two positioning rods 16 are fixedly installed on the inner wall of the valve body 1, and the bottom ends of both positioning rods 16 pass through the valve plug 15. There is a gap between the outer surface of the two positioning rods 16 and the through hole opened in the valve plug 15, and a sealing plate 17 is also provided at the bottom of the two positioning rods 16. The telescopic valve stem 14 (electric cylinder structure) moves downward, carrying... When the valve plug 15 disengages from the sealing surface inside the valve body 1, the refrigerant flows from the cavity of the valve body 1 through the gap between the valve plug 15 and the valve body 1 into the branch pipe 2, and is finally output to the air conditioning system. The telescopic valve stem 14 resets or moves upward, and the valve plug 15 tightly fits against the sealing surface of the valve body 1, blocking the flow of refrigerant. Two positioning rods 16 pass through the through hole of the valve plug 15, restricting the valve plug 15 to move only axially, preventing it from shifting or rotating and causing sealing failure. The sealing plate 17 is fixed to the bottom of the positioning rods 16, and its size is larger than the through hole of the valve plug 15, preventing the valve plug 15 from being pushed out of the valve body 1 due to high pressure, thus enhancing the sealing reliability. On the other hand, when the valve plug 15 disengages from the sealing plate 17, airflow is allowed.

[0024] Furthermore, the sealing plate 17 is larger than the through hole opened in the valve plug 15.

[0025] The working principle of this utility model is as follows: When the charging valve is in use, the telescopic valve rod 14 moves downward, causing the valve plug 15 to disengage from the sealing surface inside the valve body 1. The refrigerant flows from the cavity of the valve body 1 through the gap between the valve plug 15 and the valve body 1 into the branch pipe 2, and is finally output to the air conditioning system. The telescopic valve rod 14 is reset or moved upward, and the valve plug 15 tightly fits the sealing surface of the valve body 1, blocking the flow of refrigerant. When the internal pressure of the valve body 1 exceeds the set value, the valve shaft 7 is manually rotated, and the baffle 10 disengages from the top of the through groove of the valve plate 8. The air inlet pipe 5 is connected to the pressure relief cover 3, and the high-pressure refrigerant is discharged through the air inlet pipe 5 → through groove → pressure relief cover 3 → air outlet pipe 6, reducing the internal pressure. After rotating the valve shaft 7, the handle 11 is released, and the spring 13 pulls the valve shaft 7 back to the initial position through the movable ring 12, closing the pressure relief channel again.

[0026] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A new energy vehicle air conditioning charging valve, comprising a valve body (1) and a valve core located inside the valve body (1), and the valve body (1) is further provided with a branch pipe (2) for refrigerant output, characterized in that, It also includes a pressure relief assembly, which includes a pressure relief cover (3), a base (4), an air inlet pipe (5), an air outlet pipe (6), and a valve shaft (7). The pressure relief cover (3) and the base (4) are respectively fixedly installed on the top of the valve body (1). A valve plate (8) is fixedly connected to the base (4). A through groove is provided on the valve plate (8). One end of the air inlet pipe (5) is inserted into the base (4) and located at the through groove of the valve plate (8). The other end of the air inlet pipe (5) is inserted into the cavity of the valve body (1). The top of the pressure relief cover (3) is respectively connected to the air outlet pipe (6) and the valve shaft (7). The cavity of the air outlet pipe (6) is connected to the cavity inside the pressure relief cover (3). The valve shaft (7) is located at the center of the pressure relief cover (3) and is movably connected to the pressure relief cover (3) through a bearing. A fixing rod (9) is fixedly connected to the top of the pressure relief cover (3). The fixing rod (9) is located on one side of the valve shaft (7).

2. The new energy vehicle air conditioning charging valve according to claim 1, characterized in that, The bottom end of the valve shaft (7) is provided with a baffle (10) corresponding to the through groove of the valve plate (8) in the circumferential direction. The baffle (10) is in contact with the top of the through groove of the valve plate (8). The top end of the valve shaft (7) is provided with a handle (11) in the circumferential direction. A movable ring (12) is sleeved on the outer surface of the handle (11). A spring (13) is fixedly connected to one side of the movable ring (12). The other end of the spring (13) is fixedly connected to one side of the fixed rod (9).

3. The new energy vehicle air conditioning charging valve according to claim 1, characterized in that, The valve core includes a telescopic valve stem (14), a valve plug (15) for sealing or opening the inner cavity of the branch pipe (2), and two opposing positioning rods (16). The telescopic valve stem (14) is fixedly installed on the top wall of the valve body (1). The bottom end of the telescopic valve stem (14) is fixedly connected to the valve plug (15). The edge of the valve plug (15) fits against the inside of the valve body (1). The two positioning rods (16) are fixedly installed on the inner wall of the valve body (1), and the bottom ends of the two positioning rods (16) pass through the valve plug (15). There is a gap between the outer surface of the two positioning rods (16) and the through hole opened by the valve plug (15). The bottom of the two positioning rods (16) is also provided with a sealing plate (17).

4. The new energy vehicle air conditioning charging valve according to claim 3, characterized in that, The pressure relief cover (3) and the base (4) are sealed together by a sealing ring.

5. The new energy vehicle air conditioning charging valve according to claim 4, characterized in that, The valve body (1) is also provided with a filter screen (18), which is attached to the inlet of the air inlet pipe (5).

6. The charging valve for air conditioning in new energy vehicles according to claim 3, characterized in that, The sealing plate (17) is larger than the through hole opened by the valve plug (15).

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