Refrigerant filling device

Abstract

The utility model discloses a refrigerant filling device which comprises an assembly box, an exhaust system, a vacuumizing pipe, a filling pipe, a combustible gas detector and an anti-explosion vacuum pump, wherein the vacuumizing pipe, the filling pipe, the combustible gas detector and the anti-explosion vacuum pump are located in the assembly box. The filling pipe and the vacuumizing pipe are respectively connected to a refrigerant source and a vacuumizing device through upstream pipelines, and are respectively connected to the filling gun through downstream pipelines; a mass flow meter and a pressure sensor are arranged on the filling pipe; the exhaust system comprises an exhaust fan and an exhaust pipe, the exhaust pipe is connected to the anti-explosion vacuum pump, and the anti-explosion vacuum pump is used for extracting gas in the assembly box and exhausting the gas outwards through the exhaust pipe. By the adoption of the technical scheme, whether combustible gas leaks in the assembly box or not can be detected through the combustible gas detector, gas in the assembly box can be rapidly exhausted outwards through the explosion-proof vacuum pump and the exhaust system, the situation that the combustible gas is gathered in the assembly box to reach the explosion concentration is avoided, and therefore the explosion-proof safety of equipment is improved.

Description

Technical Field

[0001] The utility model relates to a refrigerant filling device and belongs to the technical field of automobile production process equipment. Background Art

[0002] The current vehicle air conditioning system uses HFC-134a (1,1,1,2-tetrafluoroethane, chemical formula C2H2F4) as a refrigerant, but due to its high greenhouse effect (GWP = 1300) and long atmospheric life, large-scale use will cause global warming, and it is currently being gradually replaced by other refrigerants. HFO-1234yf (2,3,3,3-tetrafluoropropylene, chemical formula C3H2F4) as a single refrigerant has excellent environmental parameters, GWP = 4, ODP = 0, life cycle climate performance (LCCP) is lower than R134A, and the atmospheric decomposition products are the same as HFC-134a. And its system performance is better than HFC-134a. If HFO-1234yf is selected to replace HFC-134a as a refrigerant, automobile manufacturers can continue to use the original mobile air-conditioning (MAC) system. However, HFO-1234yf is slightly flammable, so the traditional refrigerant filling machine system is not designed according to the explosion-proof design requirements, and therefore cannot meet the safe filling of HFO-1234yf. In addition, due to the high production rhythm of automobile production lines, ordinary equipment filling cannot meet the needs of high-speed filling. Utility Model Content

[0003] Therefore, the purpose of the utility model is to provide a refrigerant filling device, which is provided with an environmental explosion-proof function to improve the explosion-proof safety of the equipment.

[0004] In order to achieve the above-mentioned purpose, a refrigerant filling device of the utility model includes an assembly box, an exhaust system, and a vacuum pipe, a filling pipe, a combustible gas detector and an explosion-proof vacuum pump located in the assembly box; the filling pipe and the vacuum pipe are respectively connected to the refrigerant source and the vacuum device through upstream pipelines, and are respectively connected to the filling gun through downstream pipelines; a mass flow meter and a pressure sensor are arranged on the filling pipe; the exhaust system includes an exhaust fan and an exhaust pipe, the exhaust pipe is connected to the explosion-proof vacuum pump, and the explosion-proof vacuum pump is used to extract the gas in the assembly box and discharge it to the outside through the exhaust pipe.

[0005] The refrigerant filling device also includes a guide rail, a mobile frame and a driving component. The assembly box and the exhaust system are arranged on the mobile frame. The mobile frame is movably arranged on the guide rail, and the driving component is used to drive the mobile frame to move along the guide rail.

[0006] The movable frame is hoisted below the guide rail via a hoisting wheel.

[0007] The driving assembly comprises a driving motor and a gear connected to the driving motor. The driving motor is mounted on the moving frame. A rack matched with the gear is arranged on the guide rail.

[0008] The lower end surface of the guide rail is provided with two parallel racks, the motor shaft of the drive motor is connected to a gear box, the gear box is located between the two racks, and both ends of the output shaft of the gear box extend to both sides and are respectively equipped with a gear.

[0009] An electrical cabinet and an air conditioner are also arranged on the mobile frame. A controller component is arranged in the electrical cabinet. The air conditioner is used to adjust the temperature in the electrical cabinet.

[0010] Anti-collision mechanisms are arranged at the front and rear ends of the moving frame.

[0011] By adopting the above technical scheme, the refrigerant filling device of the utility model is provided with a combustible gas detector and an explosion-proof vacuum pump in the assembly box. The combustible gas detector can be used to detect whether there is a combustible gas leak in the assembly box, and the gas in the assembly box can be quickly discharged to the outside through the explosion-proof vacuum pump and the exhaust system, so as to prevent the combustible gas from accumulating in the assembly box to reach an explosive concentration, thereby improving the explosion-proof safety of the equipment; in addition, the utility model is also provided with a guide rail and a movable frame, and the movable frame is driven by a driving assembly to move along the guide rail. When the automobile is filled with refrigerant, it can move with the vehicle body, and there is no need to stop the vehicle body for filling, so as to improve the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the refrigerant filling device of the utility model.

[0013] Figure 2 It is a top view of the refrigerant filling device of the utility model.

[0014] Figure 3 It is a rear view of the refrigerant filling device of the utility model.

[0015] Figure 4 It is a side view of the refrigerant filling device of the utility model.

[0016] Figure 5 A schematic diagram of the structure of the mobile unit.

[0017] Figure 6 The figure shows the rear view of the mobile unit. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below through the accompanying drawings and specific implementation methods.

[0019] like Figure 1-6 As shown, the utility model provides a refrigerant filling device, including a guide rail 1 and a mobile unit hoisted under the guide rail 1. The mobile unit includes a mobile frame 2 and an assembly box 3 arranged on the mobile frame 2, an electrical cabinet 4, an exhaust system and a drive component.

[0020] A vacuum pipe 5, a filling pipe 6, a combustible gas detector 7 and an explosion-proof vacuum pump 8 are arranged in the assembly box 3. The filling pipe 6 and the vacuum pipe 5 are respectively connected to the refrigerant source and the vacuum device through the upstream pipeline, and are respectively connected to the filling gun through the downstream pipeline. A bracket 9 for placing the filling gun is arranged on the mobile frame 2. A mass flow meter 10 and a pressure sensor 11 are arranged on the filling pipe 6. The exhaust system includes an exhaust fan 12 and an exhaust pipe 13, and the exhaust pipe 13 is connected to the explosion-proof vacuum pump 8. The explosion-proof vacuum pump 8 is used to extract the gas in the assembly box 3 and discharge it to the outside through the exhaust pipe 13.

[0021] A ventilation hole 31 is provided on the side wall of the assembly box 3 . When the explosion-proof vacuum pump 8 extracts gas from the assembly box 3 , the internal air pressure of the assembly box 3 decreases, and the air pressure can be supplemented through the ventilation hole 31 .

[0022] The mobile frame 2 is provided with a plurality of hanging wheels 14, which are pressed on the guide rail 1 so that the mobile frame 2 is hoisted under the guide rail 1, and the driving assembly is used to drive the mobile frame 2 to move along the guide rail 1. In this embodiment, the driving assembly includes a driving motor 15 and a gear 16, the driving motor 15 is installed on the mobile frame 2, and two parallel racks 17 are provided on the lower end surface of the guide rail 1, and the motor shaft of the driving motor 15 is connected to a gear box 18, and the gear box 18 is located between the two racks 17, and the two ends of the output shaft 19 of the gear box 18 extend to both sides and are respectively equipped with a gear 16, and the two gears 16 are respectively matched with the two racks 17.

[0023] An air conditioner 19 is also provided on the electrical cabinet 4 , and the air conditioner 19 is used to adjust the temperature inside the electrical cabinet 4 .

[0024] Anti-collision mechanisms 20 are provided at the front and rear ends of the moving frame 2 .

[0025] By adopting the above technical scheme, the refrigerant filling device of the utility model is provided with a combustible gas detector 7 and an explosion-proof vacuum pump 8 in the assembly box 3. The combustible gas detector can be used to detect whether there is a combustible gas leak in the assembly box 3, and the gas in the assembly box 3 can be quickly discharged to the outside through the explosion-proof vacuum pump 8 and the exhaust system, so as to avoid the accumulation of combustible gas in the assembly box 3 to reach an explosive concentration, thereby improving the explosion-proof safety of the equipment; in addition, the utility model is also provided with a guide rail 1 and a movable frame 2, and the movable frame 2 is driven by a driving component to move along the guide rail 1. When the automobile is filled with refrigerant, it can move with the vehicle body, and there is no need to stop the vehicle body for filling, so as to improve the working efficiency.

[0026] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention of the utility model.

Claims

1. A refrigerant filling device, characterized in that: It includes an assembly box, an exhaust system, and a vacuum pipe, a filling pipe, a combustible gas detector and an explosion-proof vacuum pump located in the assembly box; the filling pipe and the vacuum pipe are respectively connected to a refrigerant source and a vacuum device through upstream pipelines, and are respectively connected to a filling gun through downstream pipelines; a mass flow meter and a pressure sensor are arranged on the filling pipe; the exhaust system includes an exhaust fan and an exhaust pipe, the exhaust pipe is connected to the explosion-proof vacuum pump, and the explosion-proof vacuum pump is used to extract the gas in the assembly box and discharge it to the outside through the exhaust pipe.

2. The refrigerant filling device according to claim 1, characterized in that: The refrigerant filling device also includes a guide rail, a mobile frame and a driving component. The assembly box and the exhaust system are arranged on the mobile frame. The mobile frame is movably arranged on the guide rail, and the driving component is used to drive the mobile frame to move along the guide rail.

3. The refrigerant filling device according to claim 2, characterized in that: The driving assembly comprises a driving motor and a gear connected to the driving motor. The driving motor is mounted on the moving frame. A rack matched with the gear is arranged on the guide rail.

4. The refrigerant filling device according to claim 3, characterized in that: The lower end surface of the guide rail is provided with two parallel racks, the motor shaft of the drive motor is connected to a gear box, the gear box is located between the two racks, and both ends of the output shaft of the gear box extend to both sides and are respectively equipped with a gear.

5. The refrigerant filling device according to any one of claims 2 to 4, characterized in that: An electrical cabinet and an air conditioner are also arranged on the mobile frame. The air conditioner is used to adjust the temperature in the electrical cabinet.

6. The refrigerant filling device according to any one of claims 2 to 4, characterized in that: Anti-collision mechanisms are arranged at the front and rear ends of the moving frame.

7. The refrigerant filling device according to any one of claims 1 to 4, characterized in that: Ventilation holes are arranged on the side walls of the assembly box.

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