Refrigerant filling device for automobile air conditioning system
By designing a refrigerant filling device including a heating module and a pressure sensor, the problem of slow or no refrigerant filling is solved, and the filling speed is increased and the refrigerant filling process is safe and controllable.
Patent Information
- Application Number
- CN202422919756.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-28
AI Technical Summary
In the prior art, the refrigerant filling process of the automobile air-conditioning system often encounters the problem of slow refrigerant filling or failure to fill the refrigerant.
A refrigerant filling device is designed, which includes a refrigerant filling tank, an insulation box, a heating module, a pressure sensor, a control chip and a safety valve. The heating module heats the insulation box to increase the pressure in the refrigerant filling tank. The pressure is monitored by the pressure sensor and the control chip to achieve a safe and controllable filling process.
It improves the refrigerant filling speed, ensures the accuracy of the filling amount, and provides safety protection during the filling process to prevent risks such as explosion caused by excessive pressure.
Smart Images
Figure CN223412304U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of refrigerant filling, and specifically relates to a refrigerant filling device for an automobile air-conditioning system. Background Art
[0002] In automotive air conditioning systems, the refrigerant charge is a critical parameter. Currently, R134a is the most commonly used refrigerant. However, when testing the optimal refrigerant charge for a vehicle, slow refrigerant charge or even failure to charge is common.
[0003] Patent CN209926674U discloses a refrigerant filling device for an automobile air-conditioning system, including a distribution part, a refrigerant connecting pipe connected to the bottom of the distribution part, a pressurizing pipe connected to one side of the distribution part, and an inlet pipe connected to the other side of the distribution part. A rubber ring is bonded to the outer wall of the inlet pipe and the side away from the distribution part. The outer wall of the inlet pipe is provided with an outer screw ring, and a ring-shaped array of inclined plates is bonded to the side of the outer screw ring away from the distribution part. The outer wall of the outer screw ring is threadedly connected to a screw barrel.
[0004] However, the technology disclosed in the above patent cannot solve the problem of slow refrigerant filling or failure to fill refrigerant during the process of filling refrigerant into the automobile air-conditioning system. Utility Model Content
[0005] The technical problem to be solved by the present invention is to provide a refrigerant filling device for an automobile air-conditioning system in view of the deficiencies in the existing technology, so as to achieve the purpose of solving the problem of slow refrigerant filling or failure to fill refrigerant during the process of filling refrigerant into the automobile air-conditioning system.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0007] The utility model provides a refrigerant filling device for an automobile air-conditioning system, comprising a refrigerant filling tank (1), a heat preservation box (2), a weighing module (3), a base (4), a heating module (5), a control chip (6), a display screen (7), a pressure sensor (8), a safety valve (9) and a pipeline (10), wherein the refrigerant filling tank (1) is arranged inside the heat preservation box (2); the heat preservation box (2) is arranged on the weighing module (3); the weighing module (3) is arranged on the base (4). The heat preservation box (2) is provided with an outer wall and an inner wall; a gap is provided between the outer wall and the inner wall of the heat preservation box (2) to form a cavity; the heating module (5) is arranged in the cavity; the control chip (6) is arranged inside the base (4); the display screen (7) is arranged on the side wall of the base (4); the tank mouth of the refrigerant filling tank (1) is connected to the pipeline (10), and the pressure sensor (8) is arranged at the connection between the tank mouth of the refrigerant filling tank (1) and the pipeline (10); the safety valve (9) is arranged on the pipeline (10).
[0008] Furthermore, the refrigerant filling tank (1) is connected to a low-pressure pipeline of the automobile air-conditioning system via a pipeline (10).
[0009] Furthermore, a through hole (41) is provided on the base (4).
[0010] Furthermore, the heating module (5) comprises a heating wire (51) and a relay (52), and the heating wire (51) and the power supply are connected to form an electrical circuit via the relay (52).
[0011] Furthermore, the input end of the control chip (6) is connected to the output end of the pressure sensor (8).
[0012] Furthermore, the output end of the control chip (6) is connected to the input end of the display screen (7) and the input end of the relay (52) respectively.
[0013] Furthermore, the pressure is released through the safety valve (9).
[0014] Furthermore, the weighing module (3) adopts an electronic scale.
[0015] The refrigerant filling device of the utility model has the following advantages:
[0016] (1) When the refrigerant filling device of the present invention is used to fill the automobile air-conditioning system with refrigerant, the heat preservation box is heated by the heating module, which can increase the internal pressure of the refrigerant filling tank, thereby solving the problem of slow refrigerant filling or failure to fill the refrigerant, and improving the filling speed.
[0017] (2) The refrigerant filling device of the present invention has a simple structure and is easy to install and operate.
[0018] (3) Through the refrigerant filling device of the present invention, the weight of the remaining refrigerant in the refrigerant filling tank can be monitored in real time during the process of refrigerant filling in the automobile air-conditioning system, and the weight of the refrigerant already filled can be known, thereby ensuring the accuracy of the refrigerant filling amount.
[0019] (4) The pressure sensor in the refrigerant filling device of the present invention monitors the internal pressure of the refrigerant filling tank in real time and displays it on a display screen for the operator to view.
[0020] (5) In the process of refrigerant filling into the automobile air-conditioning system through the refrigerant filling device of the present invention, there are two safety protection measures. One is that the control chip can control the contact point of the relay to open according to the pressure monitored by the pressure sensor, thereby stopping the heating wire from heating the insulation box; the other is that the pressure can be released through the safety valve, thereby ensuring the safety of refrigerant filling into the automobile air-conditioning system through the refrigerant filling device of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] This manual includes the following drawings, which show the following contents:
[0022] Figure 1 This is a structural diagram of a refrigerant filling device for an automobile air-conditioning system according to the present utility model;
[0023] Figure 2 The utility model is a schematic diagram of a refrigerant filling device for an automobile air-conditioning system.
[0024] Explanation of the accompanying symbols: 1. Refrigerant filling tank; 2. Insulation box; 3. Weighing module; 4. Base; 5. Heating module; 6. Control chip; 7. Display screen; 8. Pressure sensor; 9. Safety valve; 10. Pipeline; 41. Through hole; 51. Heating wire; 52. Relay. DETAILED DESCRIPTION
[0025] The following is a further detailed description of the specific implementation methods of the present invention through the description of the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and to facilitate its implementation.
[0026] Figure 1 This is a structural diagram of a refrigerant filling device for automobile air conditioning system, including a refrigerant filling tank 1, a heat preservation box 2, a weighing module 3, a base 4, a heating module 5 ( Figure 1 Not shown, see Figure 2 )、control chip 6( Figure 1 Not shown, see Figure 2), display screen 7, pressure sensor 8, safety valve 9 and pipeline 10, the refrigerant filling tank 1 is arranged inside the insulation box 2; the insulation box 2 is arranged on the weighing module 3; the weighing module 3 is arranged on the base 4; the insulation box 2 is provided with an outer wall and an inner wall; a gap is provided between the outer wall and the inner wall of the insulation box 2 to form a cavity; the heating module 5 is arranged in the cavity; the control chip 6 is arranged inside the base 4; the display screen 7 is arranged on the side wall of the base 4; the tank mouth of the refrigerant filling tank 1 is connected to the pipeline 10, and the pressure sensor 8 is arranged at the connection between the tank mouth of the refrigerant filling tank 1 and the pipeline 10; the safety valve 9 is arranged on the pipeline 10.
[0027] The refrigerant filling tank 1 is connected to the low-pressure pipeline of the automobile air-conditioning system through the pipeline 10; the base 4 is provided with a through hole 41; the heating module 5 includes a heating wire 51 ( Figure 1 Not shown, see Figure 2 ) and relay 52( Figure 1 Not shown, see Figure 2 ).
[0028] In addition, the refrigerant filling tank 1 can be directly taken out from the heat-insulating box 2 .
[0029] The device has a simple structure and is easy to install and operate.
[0030] Figure 2 This is a schematic diagram of a refrigerant filling device for automobile air conditioning system. Figure 2 As can be seen, the output of the power supply is connected to the input of the weighing module 3, the input of the control chip 6, the input of the display screen 7, and the input of the pressure sensor 8; the input of the control chip 6 is connected to the output of the pressure sensor 8; the output of the control chip 6 is connected to the input of the display screen 7 and the input of the relay 52; the heating wire 51 and the power supply are connected to form a power circuit via the relay 52. Specifically, the output of the power supply is connected to the input of the control chip 6 via a wire through the through-hole 41; the output of the power supply is connected to the input of the display screen 7 via a wire through the through-hole 41; and the input of the control chip 6 is connected to the output of the pressure sensor 8 via a signal line through the through-hole 41.
[0031] In the process of filling refrigerant into the automobile air-conditioning system through the refrigerant filling device of the present invention, the monitored pressure data is transmitted to the control chip 6 through the pressure sensor 8; the received pressure data is transmitted to the display screen 7 through the control chip 6; and the pressure data is displayed on the display screen 7.
[0032] Furthermore, during the process of refrigerant filling the automobile air conditioning system using the refrigerant filling device of the present invention, the control chip 6 also determines the relationship between the pressure monitored by the pressure sensor 8 and the first preset pressure; and also determines the relationship between the pressure monitored by the pressure sensor 8 and the second preset pressure. When the control chip 6 determines that the pressure monitored by the pressure sensor 8 is greater than the first preset pressure but not greater than the second preset pressure, the control chip 6 controls the contact points of the relay 52 to open. When the control chip 6 determines that the pressure monitored by the pressure sensor 8 is greater than the second preset pressure, the control chip 6 controls the contact points of the relay 52 to open and releases pressure through the safety valve 9.
[0033] In this embodiment, the first preset pressure is 1.9 MPa and the second preset pressure is 2 MPa, but the first preset pressure and the second preset pressure are not limited to 1.9 MPa and 2 MPa, respectively, but can be set and adjusted according to specific circumstances.
[0034] The following combination Figure 1 and Figure 2 The working principle of the refrigerant filling device of the present utility model is as follows:
[0035] When the refrigerant is added to the automobile air-conditioning system by the refrigerant filling device of the present invention, after the power is turned on, the heating wire 51 generates heat to heat the insulation box body 2, so that the tank temperature of the refrigerant filling tank 1 increases, thereby increasing the pressure in the refrigerant filling tank 1. When the pressure in the refrigerant filling tank 1 increases to a level greater than the pressure of the low-pressure system of the automobile air-conditioning system, the problem of slow refrigerant filling or failure to fill the refrigerant can be solved, and the filling speed can be increased at the same time. Moreover, as the pressure in the refrigerant filling tank 1 continues to increase, it can be easier to subsequently fill the refrigerant in the refrigerant filling tank 1 into the low-pressure pipeline of the automobile air-conditioning system.
[0036] During the process of refrigerant filling in the automobile air-conditioning system, the weight change can be recorded in real time by the weighing module 3 to achieve the purpose of real-time monitoring of the remaining refrigerant weight in the refrigerant filling tank, so that the operator can intuitively understand the weight of the refrigerant that has been filled, thereby ensuring the accuracy of the refrigerant filling amount.
[0037] During the process of refrigerant filling in the automobile air-conditioning system, the pressure in the refrigerant filling tank 1 can be monitored by the pressure sensor 8, and the monitored pressure data can be transmitted to the control chip 6 through the pressure sensor 8, and then the control chip 6 determines the relationship between the pressure monitored by the pressure sensor 8 and the first preset pressure and the second preset pressure. When the control chip 6 determines that the pressure monitored by the pressure sensor 8 is greater than the first preset pressure and not greater than the second preset pressure, the control chip 6 controls the contact point of the relay 52 to open, thereby disconnecting the power circuit formed by the heating wire 51 and the power supply through the relay 52, thereby stopping the heating wire 51 from heating the insulation box 2, thereby stopping the temperature of the refrigerant filling tank 1 from rising, thereby preventing explosions caused by excessive pressure in the refrigerant filling tank 1, etc., to ensure the safety of the operator and the integrity of the refrigerant filling device; when the control chip 6 determines that the pressure monitored by the pressure sensor 8 is greater than the first preset pressure and not greater than the second preset pressure, the control chip 6 controls the contact point of the relay 52 to open, thereby disconnecting the power circuit formed by the heating wire 51 and the power supply through the relay 52, thereby stopping the heating wire 51 from heating the insulation box 2, and thus stopping the temperature of the refrigerant filling tank 1 from rising, thereby preventing explosions caused by excessive pressure in the refrigerant filling tank 1, etc., to ensure the safety of the operator and the integrity of the refrigerant filling device; When the pressure monitored by the cut-out pressure sensor 8 is greater than the second preset pressure, the control chip 6 controls the contact point of the relay 52 to open, and releases the pressure through the safety valve 9, thereby disconnecting the power circuit formed by the heating wire 51 and the power supply through the relay 52, thereby stopping the heating wire 51 from heating the insulation box body 2, thereby stopping the action of increasing the temperature of the tank body of the refrigerant filling tank 1, and releasing the pressure through the safety valve 9, thereby preventing explosions caused by excessive pressure in the refrigerant filling tank 1, etc., to ensure the safety of the operator and the integrity of the refrigerant filling device.
[0038] In addition, the above-mentioned weighing module 3 uses an electronic scale, and a weighing device that can achieve the same function can also be used; the control chip 6 can use STM32F030C8T6, but the control chip 6 is not limited to using STM32F030C8T6, but a control chip 6 that can achieve the same function can be used; the display screen 7 can use a liquid crystal display (LCD), but the display screen 7 is not limited to using a liquid crystal display (LCD), but a display screen 7 that can achieve the same function can be used.
[0039] Functions and Effects of the Embodiments
[0040] The heat insulation box body 2 is heated by the heating wire 51, so that the tank body temperature of the refrigerant filling tank 1 increases, thereby increasing the pressure in the refrigerant filling tank 1. When the pressure in the refrigerant filling tank 1 increases to a level greater than the pressure of the low-pressure system of the automobile air-conditioning system, the problem of slow refrigerant filling or failure to fill the refrigerant can be solved, and the filling speed can be increased.
[0041] During the process of refrigerant filling in the automobile air-conditioning system, the weighing module 3 records the weight change in real time to achieve the purpose of real-time monitoring of the remaining refrigerant weight in the refrigerant filling tank, so that the operator can intuitively understand the weight of the refrigerant that has been filled, thereby ensuring the accuracy of the refrigerant filling amount.
[0042] During the process of refrigerant filling in the automobile air-conditioning system, the monitored pressure data is transmitted to the control chip 6 via the pressure sensor 8; the received pressure data is transmitted to the display screen 7 via the control chip 6; the pressure data is displayed on the display screen 7; and the operator is facilitated to view it.
[0043] When the control chip 6 determines that the pressure monitored by the pressure sensor 8 is greater than the first preset pressure and not greater than the second preset pressure, the control chip 6 controls the contact point of the relay 52 to open, thereby disconnecting the power circuit formed by the heating wire 51 and the power supply through the relay 52, thereby stopping the heating wire 51 from heating the insulation box body 2, thereby stopping the action of increasing the tank temperature of the refrigerant filling tank 1, thereby preventing explosions caused by excessive pressure in the refrigerant filling tank 1, etc., to ensure the safety of the operator and the integrity of the refrigerant filling device.
[0044] When the control chip 6 determines that the pressure monitored by the pressure sensor 8 is greater than the second preset pressure, the control chip 6 controls the contact point of the relay 52 to open and releases the pressure through the safety valve 9, thereby disconnecting the power circuit formed by the heating wire 51 and the power supply through the relay 52, thereby stopping the heating wire 51 from heating the insulation box body 2, thereby stopping the action of increasing the tank temperature of the refrigerant filling tank 1, and releasing the pressure through the safety valve 9, thereby preventing explosions caused by excessive pressure in the refrigerant filling tank 1, etc., to ensure the safety of the operator and the integrity of the refrigerant filling device.
[0045] The above description of the present invention is provided as an example, in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.
Claims
1. A refrigerant filling device for an automobile air conditioning system, characterized in that: The invention comprises a refrigerant filling tank (1), a heat preservation box (2), a weighing module (3), a base (4), a heating module (5), a control chip (6), a display screen (7), a pressure sensor (8), a safety valve (9) and a pipeline (10), wherein the refrigerant filling tank (1) is arranged inside the heat preservation box (2); the heat preservation box (2) is arranged on the weighing module (3); the weighing module (3) is arranged on the base (4); the heat preservation box (2) is provided with an outer wall and an inner wall; .... A cavity is formed by a gap between the outer wall and the inner wall of the temperature box body (2); the heating module (5) is arranged in the cavity; the control chip (6) is arranged inside the base (4); the display screen (7) is arranged on the side wall of the base (4); the tank mouth of the refrigerant filling tank (1) is connected to the pipeline (10), and the pressure sensor (8) is arranged at the connection between the tank mouth of the refrigerant filling tank (1) and the pipeline (10); the safety valve (9) is arranged on the pipeline (10).
2. A refrigerant filling device for an automobile air conditioning system according to claim 1, characterized in that: The refrigerant filling tank (1) is connected to a low-pressure pipeline of the automobile air-conditioning system via the pipeline (10).
3. The refrigerant filling device for an automobile air conditioning system according to claim 1, characterized in that: The base (4) is provided with a through hole (41).
4. The refrigerant filling device for an automobile air conditioning system according to claim 1, characterized in that: The heating module (5) comprises a heating wire (51) and a relay (52), and the heating wire (51) and a power source are connected to form an electrical circuit via the relay (52).
5. The refrigerant filling device for an automobile air conditioning system according to claim 3, characterized in that: The input end of the control chip (6) is connected to the output end of the pressure sensor (8).
6. A refrigerant filling device for an automobile air conditioning system according to claim 4, characterized in that: The output end of the control chip (6) is connected to the input end of the display screen (7) and the input end of the relay (52) respectively.
7. A refrigerant filling device for an automobile air conditioning system according to any one of claims 1 to 6, characterized in that: The pressure is released through the safety valve (9).
8. A refrigerant filling device for an automobile air conditioning system according to any one of claims 1 to 6, characterized in that: The weighing module (3) adopts an electronic scale.
Citation Information
Patent Citations
Refrigerant filling device of automobile air-conditioning system
CN209926674U