A refrigerant charging device and an air conditioning refrigerant charging device

Abstract

This invention discloses a refrigerant charging device and an air conditioning refrigerant charging device, relating to the field of automotive air conditioning refrigerant charging test equipment. The refrigerant charging device includes: a refrigerant pipeline, a first refrigerant charging valve, a second refrigerant charging valve, a first refrigerant charging head, and a second refrigerant charging head. The first refrigerant charging head is installed on the refrigerant pipeline; the first refrigerant charging valve is installed on the first refrigerant charging head, and the port of the first refrigerant charging valve is connected to the refrigerant pipeline; the second refrigerant charging head is installed on the refrigerant pipeline, and the second refrigerant charging valve is installed on the second refrigerant charging head. The refrigerant charging device provided by this invention has a simple structure, low cost, and high working efficiency. It can also improve the accuracy of test data, increase the precision of refrigerant charging quantity, and avoid refrigerant overfilling and waste. Furthermore, it can simultaneously charge refrigerant and monitor pressure; when pressure monitoring is not required, only refrigerant is charged.

Description

Technical Field

[0001] This invention relates to the field of automotive air conditioning technology, and more specifically, to the field of automotive air conditioning refrigerant charging test equipment, and particularly to a refrigerant charging device and an air conditioning refrigerant charging device. Background Technology

[0002] Currently, during automotive air conditioning refrigerant charging tests, it is necessary to monitor the pressure while adding refrigerant. Therefore, specially made prototypes are required. Existing technical solutions require a custom-made piping system and replacement of the original piping installed in the vehicle during refrigerant charging tests.

[0003] Disadvantages of existing technology:

[0004] Prototype production increases costs, and manufacturing and replacing parts is time-consuming. Recycling refrigerant, dismantling and replacing pipes, and recharging refrigerant usually takes a day. Recycling and recharging refrigerant will reduce the amount of refrigerant oil in the air conditioning system. The presence of refrigerant oil in the pipes after dismantling also affects the accuracy of test calibration.

[0005] Therefore, how to provide a refrigerant charging device has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The purpose of this invention is to provide a refrigerant charging device and an air conditioning refrigerant charging device.

[0007] According to a first aspect of the present invention, a refrigerant charging device is provided, comprising a refrigerant pipeline, a first refrigerant charging valve, a second refrigerant charging valve, a first refrigerant charging head, and a second refrigerant charging head;

[0008] The first refrigerant charging head is installed on the air conditioning pipe; the first refrigerant charging valve is installed on the first refrigerant charging head, and the port of the first refrigerant charging valve is connected to the refrigerant pipe; the second refrigerant charging head is installed on the refrigerant pipe, and the second refrigerant charging valve is installed on the second refrigerant charging head.

[0009] Optionally, the first refrigerant charging valve includes: a first charging valve pipeline, a first refrigerant charging valve body, a first charging valve rotary valve head, and a first charging valve snap-fit ​​structure.

[0010] The first refrigerant charging valve snap-fit ​​structure is sleeved on the first refrigerant charging head, the first refrigerant charging valve body is mounted on the first refrigerant charging valve snap-fit ​​structure, and the first refrigerant charging valve rotary valve head is mounted on the first refrigerant charging valve body; one end of the first refrigerant charging valve pipeline is connected to the first refrigerant charging valve body, and the other end is connected to the refrigerant pipeline.

[0011] Optionally, the second refrigerant charging valve includes: a second charging valve pipeline, a second refrigerant charging valve body, a second charging valve rotary valve head, and a second charging valve snap-fit ​​structure.

[0012] The second refrigerant charging valve snap-fit ​​structure is sleeved on the second refrigerant charging head, the second refrigerant charging valve body is installed on the second refrigerant charging valve snap-fit ​​structure, and the second refrigerant charging valve rotary valve head is installed on the second refrigerant charging valve body; one end of the second refrigerant charging valve pipeline is connected to the second refrigerant charging valve body, and the other end is connected to the pressure detection pipeline.

[0013] Optionally, the first refrigerant charging head includes: a refrigerant charging head body, a charging head inner groove, a valve needle, a sealing valve spring, and a sealing valve body;

[0014] The refrigerant charging head body is provided with an inwardly recessed charging head groove, which is used to engage with the first charging valve engaging structure.

[0015] Valve needle, sealing valve spring, sealing valve body;

[0016] The sealing valve body is installed inside the refrigerant charging head body, and the sealing valve spring is sleeved outside the valve needle, forming a whole, which is installed inside the refrigerant charging head body, and the valve needle passes through the sealing valve body.

[0017] Optionally, the first refrigerant charging head further includes: a sealing ring, wherein there are two sealing rings, a first sealing ring is provided on the sealing valve body and the refrigerant charging head body, and a second sealing ring is provided on the valve needle and the refrigerant charging head body.

[0018] Optionally, the first refrigerant charging valve further includes: a spring, a ball head, and a pin;

[0019] The ejector pin is installed below the rotary valve head of the first refrigerant filling valve and is inserted into the body of the first refrigerant filling valve.

[0020] The spring is disposed between the body of the first refrigerant charging valve and the first charging valve snap-fit ​​structure;

[0021] The ball head is installed on the inner wall of the first filling valve snap-fit ​​structure and is used to snap into the groove inside the filling head.

[0022] Optionally, the first refrigerant charging valve further includes: a mounting hole.

[0023] The mounting hole is located on the first filling valve rotary valve head. The mounting hole is a stepped threaded hole for mounting bolts. The bolts are used to mount the first filling valve rotary valve head together with the ejector pin.

[0024] Optionally, the refrigerant charging device further includes: a dust cap for the refrigerant charging head;

[0025] The dust cap of the refrigerant filling head is fastened to the first refrigerant filling head.

[0026] Optionally, the first refrigerant charging head and the second refrigerant charging head have the same structure; the second refrigerant charging valve has the same structure as the first refrigerant charging valve.

[0027] According to a second aspect of the present invention, an air conditioning refrigerant charging device is provided, the air conditioning refrigerant charging device comprising a pressure detection device, a refrigerant charging machine, and an air conditioning system;

[0028] The air conditioning refrigerant charging device includes two sets of refrigerant charging devices as described in any one of the first aspects, specifically the first set of refrigerant charging devices and the second set of refrigerant charging devices;

[0029] The second refrigerant charging valve of the first refrigerant charging device is connected to the pressure detection equipment; the first refrigerant charging valve of the first refrigerant charging device is connected to the refrigerant charging machine; the first refrigerant charging head of the first refrigerant charging device is installed on the high-pressure pipeline of the air conditioning system; the first refrigerant charging head of the second refrigerant charging device is installed on the low-pressure pipeline of the air conditioning system.

[0030] The second refrigerant charging valve of the second refrigerant charging device is connected to the pressure detection equipment; the first refrigerant charging valve of the first refrigerant charging device is connected to the refrigerant charging machine; the first refrigerant charging head of the first refrigerant charging device is installed on the high-pressure pipeline of the air conditioning system; the first refrigerant charging head of the second refrigerant charging device is installed on the high-pressure pipeline of the air conditioning system.

[0031] According to the technical content disclosed in this invention, the following beneficial effects are achieved:

[0032] The refrigerant charging device provided by this invention has a simple structure, low cost, high working efficiency, and can improve the accuracy of test data and the precision of refrigerant charging amount, avoiding refrigerant overfill and waste. At the same time, it can charge refrigerant and monitor pressure simultaneously, and only charge refrigerant when pressure monitoring is not required.

[0033] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0035] Figure 1 This is a schematic diagram of a refrigerant charging device according to an embodiment;

[0036] Figure 2 A first-view structural diagram of the refrigerant charging device when the second refrigerant charging valve is not fastened;

[0037] Figure 3 A schematic diagram of the refrigerant charging device from a second perspective when the second refrigerant charging valve is not fastened;

[0038] Figure 4 A cross-sectional view of the first refrigerant charging valve;

[0039] Figure 5 A cross-sectional view of the first refrigerant charging head;

[0040] Figure 6 This is a schematic diagram of an air conditioning refrigerant charging device according to an embodiment;

[0041] Figure 7 A schematic diagram of the second refrigerant filling valve.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100-First Refrigerant Charging Valve

[0044] 10-Mounting hole, 11-Spring, 12-Ball head, 13-Ejector pin, 14-First refrigerant charging valve pipeline, 15-First refrigerant charging valve body, 16-First refrigerant charging valve rotary valve head, 17-First refrigerant charging valve snap-fit ​​structure, 18-Ejector pin threaded part

[0045] 200-Second refrigerant charging valve

[0046] 24-Second refrigerant charging valve pipeline; 25-Second refrigerant charging valve body; 26-Second refrigerant charging valve rotary valve head; 27-Second refrigerant charging valve snap-fit ​​structure.

[0047] 300-Refrigerant piping

[0048] 400-Air Conditioning Piping

[0049] 500-Pressure Testing Pipeline

[0050] 600-First Refrigerant Filling Head

[0051] 61-Refrigerant charging head body, 62-Refrigerant charging head dust cap, 63-Charging head inner groove, 64-Valve needle, 65-Sealing valve spring, 66-Sealing valve body, 67-Sealing ring, 6701-First sealing ring, 6702-Second sealing ring

[0052] 700-Second Refrigerant Filler Head

[0053] 800-Pressure Testing Equipment

[0054] 900-Refrigerant Charging Machine

[0055] 1000 - Air conditioning system. Detailed Implementation

[0056] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0057] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0058] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0059] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0060] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0061] Example 1:

[0062] This invention provides a refrigerant charging device, such as... Figure 1 As shown, it includes: refrigerant pipeline 300, first refrigerant charging valve 100, second refrigerant charging valve 200, first refrigerant charging head 600 and second refrigerant charging head 700;

[0063] like Figure 2 As shown, the first refrigerant charging head 600 is installed on the air conditioning pipe 400; the first refrigerant charging valve 100 is installed on the first refrigerant charging head 600, and the port of the first refrigerant charging valve 100 is connected to the refrigerant pipe 300; the second refrigerant charging head 700 is installed on the refrigerant pipe 300; and the second refrigerant charging valve 200 is installed on the second refrigerant charging head 700. Figure 3As shown, the first refrigerant charging valve 100 includes: a first charging valve pipeline 14, a first refrigerant charging valve body 15, a first charging valve rotary valve head 16, and a first charging valve snap-fit ​​structure 17. The first charging valve snap-fit ​​structure 17 is sleeved on the first refrigerant charging head 600, the first refrigerant charging valve body 15 is mounted on the first charging valve snap-fit ​​structure 17, and the first charging valve rotary valve head 16 is mounted on the first refrigerant charging valve body 15. One end of the first charging valve pipeline 14 is connected to the first refrigerant charging valve body 15, and the other end is connected to the refrigerant pipeline 300. Figure 7 As shown, the second refrigerant charging valve 200 includes: a second charging valve pipeline 24, a second refrigerant charging valve body 25, a second charging valve rotary valve head 26, and a second charging valve snap-fit ​​structure 27. The second charging valve snap-fit ​​structure 27 is sleeved on the second refrigerant charging head 700, the second refrigerant charging valve body 25 is mounted on the second charging valve snap-fit ​​structure 27, and the second charging valve rotary valve head 26 is mounted on the second refrigerant charging valve body 25. One end of the second charging valve pipeline 24 is connected to the second refrigerant charging valve body 25, and the other end is connected to the pressure detection pipeline 500. The second charging valve snap-fit ​​structure 27 can move up and down in the Z-axis direction and control the radial movement of the ball head 12.

[0064] like Figure 5 As shown, the second refrigerant charging head 700 includes: a refrigerant charging head body 61, a charging head inner groove 63, a valve needle 64, a sealing valve spring 65, and a sealing valve body 66; the refrigerant charging head body 61 is provided with an inwardly recessed charging head inner groove 63, which is used to engage with the first charging valve engaging structure 17; the sealing valve body 66 is installed inside the refrigerant charging head body 61, and the sealing valve spring 65 is sleeved on the outside of the valve needle 64, forming a whole, and is installed inside the refrigerant charging head body 61, with the valve needle 64 passing through the sealing valve body 66.

[0065] The second refrigerant charging head 700 further includes: a sealing ring 67, wherein there are two sealing rings 67, a first sealing ring 6701 is provided on the sealing valve body 66 and the refrigerant charging head body 61, and a second sealing ring 6702 is provided on the valve needle 64 and the refrigerant charging head body 61.

[0066] like Figure 4As shown, the first refrigerant charging valve 100 further includes: a spring 11, a ball head 12, and a pin 13; the pin 13 is installed below the first charging valve rotary valve head 16 and is inserted into the interior of the first refrigerant charging valve body 15; the spring 11 is disposed between the first refrigerant charging valve body 15 and the first charging valve locking structure 17; the ball head 12 is installed on the inner wall of the first charging valve locking structure 17 and is used to lock into the inner groove 63 of the charging head; the first charging valve rotary valve head 16 can rotate to control the up and down movement of the pin 13; The ejector pin 13 can open the sealing valve body 66, connecting the sealed air conditioning system to the outside; the ball head 12 can be engaged in the groove 63 inside the filling head for fixation; the first filling valve rotary valve head 16 is provided with threads, and by rotating the first filling valve rotary valve head 16, the threads can be rotated, which can control the ejector pin 13 to move up and down in the Z-axis direction. When it moves to the lowest point, it can open the sealing valve body; the upper part of the ejector pin 13 is provided with an ejector pin threaded part 18, which is connected to the first refrigerant filling valve body 15 by threaded engagement.

[0067] The first refrigerant charging valve 100 further includes: a mounting hole 10; the mounting hole 10 is provided on the first charging valve rotary valve head 16, the mounting hole 10 is a stepped threaded hole for mounting bolts, the bolts are used to mount the first charging valve rotary valve head 16 and the ejector pin 13 together.

[0068] like Figure 5 As shown, the refrigerant charging device also includes a refrigerant charging head dust cap 62; when refrigerant is not being charged, the first refrigerant charging valve 100 can be removed and the refrigerant charging head dust cap 62 can be fastened onto the second refrigerant charging head 700.

[0069] The first refrigerant charging head 600 and the second refrigerant charging head 700 have the same structure;

[0070] The second refrigerant charging valve 200 and the first refrigerant charging valve 100 have the same structure.

[0071] Both the first filling valve pipeline 14 and the second filling valve pipeline 24 are provided with threaded parts, which are screwed into the connected pipeline to complete the connection.

[0072] The first refrigerant charging valve 100 rotates, controlling the pin to move up and down in the Z-axis direction, so that the fixed end face is in contact with the valve needle end face, thereby controlling the valve needle to move up and down along the Z-axis direction.

[0073] The spring 11 is disposed between the first refrigerant charging valve body 15 and the first charging valve locking structure 17; when the first charging valve locking structure 17 moves to the highest point along the Z-axis direction, the ball head 12 can move back and forth radially; when the first charging valve locking structure 17 moves to the lowest point along the Z-axis direction, the ball head 12 is in contact with the inner wall of the first charging valve locking structure 17, and the ball head 12 is limited to the innermost radial side, wherein the Z-axis direction is the vertical direction shown in the figure.

[0074] The invention provides a platform-based universal component that reduces costs, improves work efficiency, enhances the accuracy of test data, improves the precision of refrigerant charging, avoids refrigerant overfilling and waste, and allows for simultaneous refrigerant charging and pressure monitoring. When pressure monitoring is not required, only refrigerant is charged.

[0075] Example 2:

[0076] The present invention also provides an air conditioning refrigerant charging device, such as... Figure 6 As shown, the air conditioning refrigerant charging device includes a pressure detection device 800, a refrigerant charging machine 900, and an air conditioning system 1000;

[0077] The air conditioning refrigerant charging device includes two sets of refrigerant charging devices as described in any one of the embodiments, specifically the first set of refrigerant charging device and the second set of refrigerant charging device;

[0078] The second refrigerant charging valve 200 of the first refrigerant charging device is connected to the pressure detection device 800; the first refrigerant charging valve 100 of the first refrigerant charging device is connected to the refrigerant charging machine 900; the first refrigerant charging head 600 of the first refrigerant charging device is installed on the high-pressure pipeline in the air conditioning system 1000; the first refrigerant charging head of the second refrigerant charging device is installed on the low-pressure pipeline in the air conditioning system 1000.

[0079] The second refrigerant charging valve 200 of the second refrigerant charging device is connected to the pressure detection device 800; the first refrigerant charging valve 100 of the first refrigerant charging device is connected to the refrigerant charging machine 900; the first refrigerant charging head 600 of the first refrigerant charging device is installed on the high-pressure pipeline in the air conditioning system 1000; the first refrigerant charging head of the second refrigerant charging device is installed on the high-pressure pipeline in the air conditioning system 1000.

[0080] Working principle:

[0081] Using the air conditioning refrigerant charging device described in Example 2, a refrigerant charging calibration test was conducted. This test primarily determines the appropriate refrigerant mass required for the air conditioning system of a new vehicle model. The test involves simultaneously charging the refrigerant and measuring the pressure of the high-pressure and low-pressure pipes, collecting test data as the basis for calibration judgment.

[0082] Test Example: Turn on the refrigerant charging machine 900, add 200g of refrigerant, and then turn it off. After the car's air conditioning system has stabilized (5-10 minutes), record the pressure values ​​of the high-pressure and low-pressure air conditioning lines. The pressure values ​​are continuously measured, and only the values ​​after stabilization are recorded.

[0083] Then turn on the refrigerant charging machine and add 50g more refrigerant on top of the 200g already added, then turn off the charging machine. After the car's air conditioning system has been running stably for 5-10 minutes, record the pressure values ​​of the high-pressure and low-pressure air conditioning lines.

[0084] The refrigerant is added cyclically until completion, for example, until 700g is added. This test process requires recording the added amount, pressure, and temperature data, which are not detailed here but are provided for final refrigerant dosage analysis. This invention provides a refrigerant charging device and an air conditioning refrigerant charging device that utilizes standardized, universal components, reducing costs, improving work efficiency, enhancing the accuracy of test data, and increasing the precision of refrigerant dosage, thus avoiding refrigerant overfilling and waste. It can simultaneously add refrigerant and monitor pressure; when pressure monitoring is not required, only refrigerant is added.

[0085] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A refrigerant charging device, characterized in that, The application relates to a refrigerant filling device. The refrigerant filling device comprises a refrigerant pipeline, a first refrigerant filling valve, a second refrigerant filling valve, a first refrigerant filling head and a second refrigerant filling head. The first refrigerant filling head is installed on the air conditioner pipeline; the first refrigerant filling valve is installed on the first refrigerant filling head, the port of the first refrigerant filling valve is connected with the refrigerant pipeline, the second refrigerant filling head is installed on the refrigerant pipeline, and the second refrigerant filling valve is installed on the second refrigerant filling head. The first refrigerant filling valve comprises a first filling valve pipeline, a first refrigerant filling valve body, a first filling valve rotary valve head and a first filling valve clamping structure. The first filling valve clamping structure is sleeved on the first refrigerant filling head, the first refrigerant filling valve body is installed on the first filling valve clamping structure, and the first filling valve rotary valve head is installed on the first refrigerant filling valve body.

2. The refueling device according to claim 1, characterized in that One end of the first filling valve pipeline is communicated with the first refrigerant filling valve body, and the other end is connected with the refrigerant pipeline. The second refrigerant filling valve comprises a second filling valve pipeline, a second refrigerant filling valve body, a second filling valve rotary valve head and a second filling valve clamping structure.

3. The refueling device according to claim 2, characterized in that The second filling valve clamping structure is sleeved on the second refrigerant filling head, the second refrigerant filling valve body is installed on the second filling valve clamping structure, and the second filling valve rotary valve head is installed on the second refrigerant filling valve body. One end of the second filling valve pipeline is communicated with the second refrigerant filling valve body, and the other end is connected with the pressure detection pipeline. The first refrigerant filling head comprises a refrigerant filling head body, a filling head inner groove, a valve needle, a sealing valve spring and a sealing valve body. The refrigerant filling head body is provided with an inwardly recessed filling head inner groove, and the filling head inner groove is used for clamping the first filling valve clamping structure.

4. The refueling device according to claim 3, characterized in that The valve needle, the sealing valve spring and the sealing valve body.

5. The refueling device according to claim 4, characterized in that The sealing valve body is installed in the interior of the refrigerant filling head body, the sealing valve spring is sleeved outside the valve needle, forms an integral whole, is installed in the interior of the refrigerant filling head body, and the valve needle penetrates through the sealing valve body. The first refrigerant filling head further comprises a sealing ring, the sealing ring comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged on the sealing valve body and the refrigerant filling head body, and the second sealing ring is arranged on the valve needle and the refrigerant filling head body. The first refrigerant filling valve further comprises a spring, a ball head and a thimble. The thimble is installed below the first filling valve rotary valve head and is inserted into the interior of the first refrigerant filling valve body.

6. The refueling device according to claim 5, wherein The spring is arranged between the first refrigerant filling valve body and the first filling valve clamping structure. The ball head is installed on the inner wall of the first filling valve clamping structure and is used for clamping in the filling head inner groove.

7. The refueling device according to claim 1, wherein The first refrigerant filling valve further comprises a mounting hole. The mounting hole is arranged on the first filling valve rotary valve head, is a stepped thread hole, is used for mounting a bolt, and the bolt is used for mounting the first filling valve rotary valve head and the thimble together. The refrigerant filling device further comprises a refrigerant filling head dustproof cap. The dustproof cap of the refrigerant filling head is buckled on the first refrigerant filling head.

8. The refueling device according to claim 6, characterized in that The first refrigerant filling head and the second refrigerant filling head are of the same structure; the second refrigerant filling valve and the first refrigerant filling valve are of the same structure.

9. An air conditioner refrigerant filling device characterized by comprising: The air conditioner refrigerant filling device comprises a pressure detection device, a refrigerant filling machine and an air conditioner system. The air conditioner refrigerant filling device comprises two sets of the refrigerant filling device according to any one of claims 1-8. The second refrigerant filling valve of the first set of refrigerant filling devices is connected with the pressure detection device; the first refrigerant filling valve of the first set of refrigerant filling devices is connected with the refrigerant filling machine; and the first refrigerant filling head of the first set of refrigerant filling devices is installed on a high-pressure pipeline in the air conditioner system. The first refrigerant filling head in the second set of refrigerant filling devices is installed on a low-pressure pipeline in the air conditioner system. The second refrigerant filling valve of the first set of refrigerant filling devices is connected with the pressure detection device; the first refrigerant filling valve of the first set of refrigerant filling devices is connected with the refrigerant filling machine; the first refrigerant filling head of the first set of refrigerant filling devices is installed on a high-pressure pipeline in the air conditioner system; and the first refrigerant filling head in the second set of refrigerant filling devices is installed on a high-pressure pipeline in the air conditioner system.

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