Refrigerant filling device for automobile air conditioner

Abstract

The utility model relates to the technical field of automobile maintenance equipment, and discloses an automobile air conditioner refrigerant filling device which comprises a bottom plate, supporting legs are fixedly installed on the two sides of the bottom of the bottom plate at equal intervals, universal wheels are fixedly installed at the bottoms of the supporting legs, and an enclosure frame is fixedly connected to the top of the bottom plate. And a placement frame is fixedly mounted on one side of the enclosure frame. By arranging the metering assembly, accurate liquid metering can be conducted, the filling pump is started to extract a refrigerant in the liquid storage box, the electromagnetic valve is started to open the valve, liquid enters the metering box, under the pressure effect, the liquid pushes the pressurizing plate and the nail rod to ascend, the first spring is compressed, the first electric contact is made to make contact with the second electric contact, and the liquid enters the metering box. And the two contacted electric contacts are electrically connected with the electromagnetic valve and the filling pump, so that the electromagnetic valve closes the valve, the filling pump stops pumping, the filling amount every time is ensured to be accurate, the requirements of air conditioning systems of different vehicle types are met, and the metering effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of automotive repair equipment technology, specifically to an automotive air conditioning refrigerant charging device. Background Technology

[0002] Automotive air conditioning refrigerant is the working medium used to achieve the refrigeration cycle in automotive air conditioning systems. Based on the design requirements and cooling capacity needs of the automotive air conditioning system, a refrigerant with suitable evaporation temperature, condensation pressure, and refrigeration efficiency is selected. The refrigerant must be compatible with components such as the compressor, condenser, and evaporator of the automotive air conditioning system, as well as sealing materials and lubricating oils, to avoid problems such as corrosion and leakage. Different refrigerants have different requirements for system materials.

[0003] In the existing technology, after the air conditioning system is installed on the automobile production line, a charging device is needed to accurately charge a specified amount of refrigerant into the air conditioning system to ensure that the air conditioning system of each car that comes off the line can work normally. During use, the charging process usually needs to be observed manually, and the amount of refrigerant charged cannot be accurately controlled, which leads to the inability to meet the needs of air conditioning systems of different models. In addition, there may be a risk of leakage during the charging process, which can easily affect the surrounding environment.

[0004] Therefore, a refrigerant charging device for automotive air conditioning is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide an automotive air conditioning refrigerant charging device, which solves the technical problems that usually require manual observation of the charging process, making it impossible to accurately control the amount of refrigerant charged, thus failing to meet the needs of air conditioning systems of different models, and that there may be a risk of leakage during the charging process, which can easily affect the surrounding environment. The device achieves the purpose of metering and leakage prevention.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automotive air conditioning refrigerant charging device, comprising a base plate, support legs fixedly installed at equal intervals on both sides of the bottom of the base plate, universal wheels fixedly installed on the bottom of the support legs, a frame fixedly connected to the top of the base plate, a placement rack fixedly installed on one side of the frame, a metering component provided on the top of the placement rack, and a sealing component provided on the surface of the metering component.

[0007] Preferably, the metering component specifically includes: a liquid storage tank, disposed on the top of the base plate; a connecting pipe, connected to and installed on the outer wall of the liquid storage tank; a filling pump, disposed on the top of the liquid storage tank; a metering box, disposed on the top of the placement rack; a pressure plate, disposed inside the metering box; a squeezing plate, slidably connected between the inner walls of the metering box; a limiting perforated plate, equidistantly fixedly installed on the top of the metering box; and a scale, formed on the surface of the limiting perforated plate.

[0008] Preferably, the other end of the first connecting pipe is connected to one side of the filling pump, and the other side of the filling pump is connected to the second connecting pipe. The outer wall of the second connecting pipe is provided with an electromagnetic valve, and the other end of the second connecting pipe is connected to one side of the metering box. The front and back of the metering box are fixedly installed with handles.

[0009] Preferably, a sealing sleeve is fixedly fitted on the outer wall of the pressure plate, the outer wall of the sealing sleeve is in contact with the inner wall of the metering box, an electrical contact is fixedly installed on the top of the pressure plate, and nail rods are equidistantly arranged on the top of the extrusion plate. The bottom of the nail rods movably penetrates the top of the extrusion plate and extends to the bottom of the extrusion plate and is fixedly connected to the top of the pressure plate.

[0010] Preferably, an electrical contact 2 is fixedly installed at the bottom of the extrusion plate, and a spring 1 is fixedly installed at equal and uniform intervals between the bottom two sides of the extrusion plate and the top two sides of the pressure plate. A connecting rod is fixedly installed at the top of the extrusion plate, and the top of the connecting rod movably passes through the top of the inner wall of the metering box and extends to the top of the metering box.

[0011] Preferably, a double-sided sliding block is fixedly installed on the top of the connecting rod, and a T-shaped push block is slidably connected to the inner wall of the double-sided sliding block. A spring is installed between one side of the T-shaped push block and one side of the inner wall of the double-sided sliding block, and a positioning plate is fixedly installed on the other side of the T-shaped push block. The other side of the positioning plate extends to the inner wall of the limiting hollow plate and engages with it. The base plate is easily moved to different vehicles for refueling operations via casters installed on both sides of its bottom, improving convenience and flexibility. The system connects to the storage tank, connecting pipe, and refueling... The injection pump, connecting pipe 2, and solenoid valve deliver refrigerant into the metering tank. Under pressure, the pressure plate, sealing sleeve, electrical contact 1, and nail rod rise, compressing spring 1 and causing electrical contact 1 to contact electrical contact 2. The two contacting electrical contacts are electrically connected to the solenoid valve and injection pump, causing the solenoid valve to close and the injection pump to stop pumping liquid. The amount of liquid stored in the metering tank can be adjusted through the cooperation of the connecting rod, limit cutout plate, double-sided sliding block, scale, T-shaped push block, spring 2, and positioning plate, thereby achieving the metering effect.

[0012] Preferably, the sealing assembly specifically includes: a discharge pipe, connected and installed on the other side of the metering box; a recessed box, fixedly installed on the other side of the metering box; a motor, fixedly installed on the bottom of the inner wall of the recessed box; a connecting pipe, connected and installed on the other end of the discharge pipe; and sealing rubber, fixedly installed between the inner walls of the connecting pipe.

[0013] Preferably, a rotating shaft is fixedly installed at the output end of the motor. The other end of the rotating shaft movably passes through the bottom of the inner wall of the concave box, the outer wall of the connecting pipe, and extends into the interior of the connecting pipe. A valve is fixedly installed at the other end of the rotating shaft. A sealing ring is fixedly fitted on the outer wall of the valve. The outer wall of the sealing ring fits against the inner wall of the discharge pipe. The metering box can be sealed through the discharge pipe, the concave box, the motor, the valve, and the sealing ring. At the same time, liquid can be discharged. The filling port within a certain range can be sealed through the connecting pipe and the sealing rubber to prevent liquid leakage, thereby achieving a sealing effect.

[0014] This utility model provides a refrigerant charging device for automotive air conditioning. It has the following beneficial effects:

[0015] (1) This utility model can accurately measure liquid by setting a metering component. The charging pump is started to extract refrigerant from the liquid storage tank. The solenoid valve is started to open the valve, and the liquid enters the metering box. Under pressure, the liquid pushes the pressure plate and nail rod to rise, so that the first spring is compressed and the first electrical contact and the second electrical contact are in contact. The two contacting electrical contacts are electrically connected to the solenoid valve and the charging pump, so that the solenoid valve closes the valve and the charging pump stops pumping, ensuring that the amount of liquid added each time is accurate and meets the needs of air conditioning systems of different models, thereby achieving the effect of metering.

[0016] (2) This utility model can seal during filling by setting a sealing component. The connecting pipe is locked at the filling port, and the inner part of the sealing rubber is conical, which can seal filling ports of different sizes within a certain range. The motor is started to drive the valve and sealing ring to rotate. Under the action of gravity, the liquid is discharged through the discharge pipe and then filled. This can effectively prevent the refrigerant from leaking into the environment during the filling process, thereby achieving the sealing effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a partial structural diagram of the liquid storage tank of this utility model;

[0019] Figure 3 This is a partial structural diagram of the metering component of this utility model;

[0020] Figure 4 This is a partial structural diagram of the T-shaped pusher block of this utility model;

[0021] Figure 5 This is a partial structural diagram of the sealing component of this utility model.

[0022] In the diagram: 1. Base plate, 2. Support legs, 3. Casters, 4. Enclosure frame, 5. Placement rack, 6. Metering assembly, 611. Liquid storage tank, 612. Connecting pipe one, 613. Filling pump, 614. Connecting pipe two, 615. Solenoid valve, 616. Metering box, 617. Pressure plate, 618. Sealing sleeve, 619. Electrical contact one, 6111. Extrusion plate, 6112. Nail rod, 6113. Electrical contact two, 6114. Spring one, 6115. Connecting rod, 6116. Limiting perforated plate, 6117. Double-sided sliding block, 6118. Scale, 6119. T-shaped push block, 61111. Spring two, 61112. Positioning plate, 7. Sealing assembly, 711. Discharge pipe, 712. Concave box, 713. Motor, 714. Valve, 715. Sealing ring, 716. Connecting pipe, 717. Sealing rubber. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] Example 1:

[0026] Currently, refrigerant charging typically requires manual monitoring, which makes it difficult to precisely control the amount of refrigerant added, resulting in inadequate support for different vehicle air conditioning systems. Furthermore, the charging process carries the risk of leakage, potentially impacting the surrounding environment. Therefore, this invention provides a preferred embodiment of an automotive air conditioning refrigerant charging device, for example... Figure 1-5 As shown: A car air conditioning refrigerant charging device includes a base plate 1, with support legs 2 fixedly installed at equal intervals on both sides of the bottom of the base plate 1, casters 3 fixedly installed on the bottom of the support legs 2, a frame 4 fixedly connected to the top of the base plate 1, a placement rack 5 fixedly installed on one side of the frame 4, a metering component 6 provided on the top of the placement rack 5, and a sealing component 7 provided on the surface of the metering component 6.

[0027] The metering component 6 specifically includes: a liquid storage tank 611, which is located on the top of the base plate 1; a connecting pipe 612, which is connected to and installed on the outer wall of the liquid storage tank 611; a filling pump 613, which is located on the top of the liquid storage tank 611; a metering box 616, which is located on the top of the placement rack 5; a pressure plate 617, which is located inside the metering box 616; a squeezing plate 6111, which is slidably connected between the inner walls of the metering box 616; a limiting perforated plate 6116, which is fixedly installed at equal intervals on the top of the metering box 616; and a scale 6118, which is formed on the surface of the limiting perforated plate 6116.

[0028] The other end of the connecting pipe 612 is connected to one side of the filling pump 613. The other side of the filling pump 613 is connected to the connecting pipe 614. The outer wall of the connecting pipe 614 is equipped with a solenoid valve 615. The other end of the connecting pipe 614 is connected to one side of the metering box 616. The front and back of the metering box 616 are fixedly installed with handles.

[0029] A sealing sleeve 618 is fixedly fitted on the outer wall of the pressure plate 617. The outer wall of the sealing sleeve 618 is in contact with the inner wall of the metering box 616. An electrical contact 619 is fixedly installed on the top of the pressure plate 617. Nails 6112 are equidistantly arranged on the top of the extrusion plate 6111. The bottom of the nails 6112 movably passes through the top of the extrusion plate 6111 and extends to the bottom of the extrusion plate 6111, where they are fixedly connected to the top of the pressure plate 617.

[0030] An electrical contact 6113 is fixedly installed at the bottom of the extrusion plate 6111. Springs 6114 are fixedly installed at equal intervals between the bottom sides of the extrusion plate 6111 and the top sides of the pressure plate 617. A connecting rod 6115 is fixedly installed at the top of the extrusion plate 6111. The top of the connecting rod 6115 moves through the top of the inner wall of the metering box 616 and extends to the top of the metering box 616.

[0031] A double-sided sliding block 6117 is fixedly installed on the top of the connecting rod 6115. A T-shaped push block 6119 is slidably connected to the inner wall of the double-sided sliding block 6117. A spring 61111 is installed between one side of the T-shaped push block 6119 and one side of the inner wall of the double-sided sliding block 6117. A positioning plate 61112 is fixedly installed on the other side of the T-shaped push block 6119. The other side of the positioning plate 61112 extends to the inner wall of the limiting hollow plate 6116 and engages with it.

[0032] In this example, accurate liquid metering can be achieved by setting up metering component 6. The filling pump 613 is started to extract refrigerant from the liquid storage tank 611. The solenoid valve 615 is started to open the valve, and the liquid enters the metering tank 616. Under pressure, the liquid pushes the pressure plate 617 and the nail rod 6112 to rise, which compresses the spring 6114 and makes the electrical contact 619 and the electrical contact 6113 come into contact. The two contacting electrical contacts are electrically connected to the solenoid valve 615 and the filling pump 613, which causes the solenoid valve 615 to close the valve and the filling pump 613 to stop pumping, thereby achieving the metering function.

[0033] Example 2:

[0034] Based on Embodiment 1, a preferred embodiment of the automotive air conditioning refrigerant charging device provided by this utility model is as follows: Figure 1-5 As shown: The sealing assembly 7 specifically includes: a discharge pipe 711, which is connected and installed on the other side of the metering box 616; a recessed box 712, which is fixedly installed on the other side of the metering box 616; a motor 713, which is fixedly installed on the bottom of the inner wall of the recessed box 712; a connecting pipe 716, which is connected and installed on the other end of the discharge pipe 711; and a sealing rubber 717, which is fixedly installed between the inner walls of the connecting pipe 716.

[0035] A rotating shaft is fixedly installed at the output end of the motor 713. The other end of the rotating shaft passes through the bottom of the inner wall of the concave box 712 and the outer wall of the connecting pipe 716 and extends into the interior of the connecting pipe 716. A valve 714 is fixedly installed at the other end of the rotating shaft. A sealing ring 715 is fixedly sleeved on the outer wall of the valve 714. The outer wall of the sealing ring 715 is in contact with the inner wall of the discharge pipe 711.

[0036] In this example, the sealing component 7 can be set to seal during filling. The connecting pipe 716 is engaged at the filling port. The sealing rubber 717 is cone-shaped and can seal filling ports of different sizes within a certain range. The motor 713 is started to drive the valve 714 and the sealing ring 715 to rotate. Under the action of gravity, the liquid is discharged through the discharge pipe 711 and then filled, thereby achieving the sealing effect.

[0037] Working principle: First, the casters 3 and outriggers 2 work together to move the base plate 1, facilitating transportation. The metering box 616 is moved using the handle, and the connecting pipe 716 engages with the filling port, placing the metering box 616 vertically. The sealing rubber 717 has a conical shape inside, which can seal filling ports of different sizes within a certain range, preventing liquid leakage. When accurate liquid measurement is required, the filling pump 613 is started to draw refrigerant from the storage tank 611, and the solenoid valve 615 is activated to open the valve, allowing liquid to enter the metering box 616. Under pressure, the liquid pushes the pressure plate 617 and the nail rod 6112 upwards, compressing the spring 6114 and causing the electrical contact 619 to contact the electrical contact 6113. The two contacting electrical contacts are electrically connected to the solenoid valve 615 and the filling pump 613, causing the solenoid valve 615 to close and the filling pump 613 to stop pumping. When the liquid in the metering tank 616 reaches the set filling amount, the pressure plate 617 rises to a certain position, causing the electrical contact 619 and the electrical contact 6113 to contact, triggering a circuit signal. The signal is transmitted to the control system, which then controls the charging pump 613 to stop working and simultaneously closes the solenoid valve 615, stopping the continued extraction of refrigerant. Then, the motor 713 is started, driving the valve 714 and sealing ring 715 to rotate. Under gravity, the liquid is discharged through the discharge pipe 711 and charged through the connecting pipe 716. After the pressure in the metering tank 616 is released, the spring 6114 releases its stored energy, causing the pressure plate 617 to reset. When it is necessary to adjust the contents of the metering tank 616, the T-shaped pusher 6119 is pressed inwards. The spring 61111 is compressed, and the T-shaped pusher 6119 drives the positioning plate 61112 to separate from the limiting hollow plate 6116, which can then move up and down. The connecting rod 6115 drives the pressing plate 6111 to move up and down. The movement distance can be observed through the scale 6118. After adjusting to the desired position, the T-shaped pusher 6119 is released, and the spring 61111 releases its stored energy. The T-shaped pusher 6119 drives the positioning plate 61112 to engage with the limiting hollow plate 6116, thereby achieving the functions of metering and sealing.

[0038] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A motor vehicle air conditioning refrigerant filling device comprising a base plate (1), characterised in that: The bottom of the bottom plate (1) is fixedly installed with a supporting leg (2) at both sides, the bottom of the supporting leg (2) is fixedly installed with a universal wheel (3), the top of the bottom plate (1) is fixedly connected with a surrounding frame (4), one side of the surrounding frame (4) is fixedly installed with a placing rack (5), the top of the placing rack (5) is provided with a metering assembly (6), and the surface of the metering assembly (6) is provided with a sealing assembly (7).

2. The automobile air conditioner refrigerant charging device according to claim 1, characterized by: The metering assembly (6) specifically comprises: A liquid storage tank (611) arranged on the top of the bottom plate (1); A first connecting pipe (612) communicatedly installed on the outer wall of the liquid storage tank (611); A filling pump (613) arranged on the top of the liquid storage tank (611); A metering tank (616) arranged on the top of the placing rack (5); A pressing plate (617) arranged in the metering tank (616); An extrusion plate (6111) slidably connected between the inner walls of the metering tank (616); A limiting hollow plate (6116) fixedly installed on the top of the metering tank (616); A scale (6118) arranged on the surface of the limiting hollow plate (6116).

3. The automobile air conditioner refrigerant charging apparatus according to claim 2, characterized by: The other end of the first connecting pipe (612) is communicated with one side of the filling pump (613), the other side of the filling pump (613) is communicatedly installed with a second connecting pipe (614), the outer wall of the second connecting pipe (614) is provided with an electromagnetic valve (615), the other end of the second connecting pipe (614) is communicated with one side of the metering tank (616), and the front and back surfaces of the metering tank (616) are fixedly installed with handles.

4. The automobile air conditioner refrigerant charging apparatus according to claim 2, characterized by: The outer wall of the pressing plate (617) is fixedly sleeved with a sealing sleeve (618), the outer wall of the sealing sleeve (618) is fitted with the inner wall of the metering tank (616), the top of the pressing plate (617) is fixedly installed with an electric contact (619), the top of the extrusion plate (6111) is fixedly installed with a nail rod (6112), the bottom of the nail rod (6112) is movably penetrated through the top of the extrusion plate (6111) and extends to the bottom of the extrusion plate (6111) and is fixedly connected with the top of the pressing plate (617).

5. The automobile air conditioner refrigerant charging apparatus according to claim 2, characterized by: The bottom of the extrusion plate (6111) is fixedly installed with an electric contact (6113), the bottom of the extrusion plate (6111) is fixedly installed with a spring (6114) between the two sides of the top of the pressing plate (617), the top of the extrusion plate (6111) is fixedly installed with a connecting rod (6115), and the top of the connecting rod (6115) is movably penetrated through the inner wall of the metering tank (616) and extends to the top of the metering tank (616).

6. The automobile air conditioner refrigerant charging apparatus according to claim 5, wherein: The top of the connecting rod (6115) is fixedly installed with a double-sided sliding groove block (6117), the inner wall of the double-sided sliding groove block (6117) is slidably connected with a T-shaped push block (6119), one side of the T-shaped push block (6119) is installed with a spring two (61111) between the inner wall of the double-sided sliding groove block (6117), the other side of the T-shaped push block (6119) is fixedly installed with a positioning plate (61112), the other side of the positioning plate (61112) extends to the inner wall of the limiting hollow plate (6116) and is clamped.

7. The automobile air conditioner refrigerant charging apparatus according to claim 1, characterized by: The sealing assembly (7) specifically comprises: The discharge pipe (711) is communicated and installed on the other side of the metering box (616); The concave box (712) is fixedly installed on the other side of the metering box (616); The motor (713) is fixedly installed on the inner wall bottom of the concave box (712); The connecting pipe (716) is communicated and installed on the other end of the discharge pipe (711); The sealing rubber (717) is fixedly installed between the inner wall of the connecting pipe (716).

8. The automobile air conditioner refrigerant charging apparatus according to claim 7, characterized by: The output end of the motor (713) is fixedly installed with a rotating shaft, the other end of the rotating shaft is movably penetrated through the inner wall bottom of the concave box (712), the outer wall of the connecting pipe (716) and extends to the inside of the connecting pipe (716), the other end of the rotating shaft is fixedly installed with a valve (714), the outer wall of the valve (714) is fixedly sleeved with a sealing ring (715), and the outer wall of the sealing ring (715) is matched with the inner wall of the discharge pipe (711).

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