Refrigerant cleaning, recovery and charging device and method

Abstract

A refrigerant cleaning, recovery and charging device and method. A first valve body (V1) and a second valve body (V2) are connected in series between a low-pressure pipeline inlet (T1) and a high-pressure pipeline inlet (T2), and a junction of the first valve body (V1) and the second valve body (V2) is communicated with a refrigerant storage tank (9); a third valve body (V3) and a fourth valve body (V4) are connected in series between the low-pressure pipeline inlet (T1) and the high-pressure pipeline inlet (T2), and a junction of the third valve body (V3) and the fourth valve body (V4) is communicated with an oil-gas separator (3); a fifth valve body (V5) is connected between the oil-gas separator (3) and an old oil cylinder (2); a seventh valve body (V7) is connected between the oil-gas separator (3) and a vacuum pump (4); the oil-gas separator (3), a compressor (6), a compressor oil separator (7), a condenser (8), and the refrigerant storage tank (9) are sequentially communicated; and an eighth valve body (V8) is connected between the low-pressure pipeline inlet (T1) and a new oil cylinder (1).

Description

Refrigerant cleaning, recovery and filling device and method Technical Field

[0001] The present invention relates to refrigerant cleaning and filling equipment, and in particular to a refrigerant cleaning, recovery and filling device and method. Background Art

[0002] Currently, the refrigeration system has become an important part of the automobile. The amount of refrigerant in the refrigeration system and the refrigerant purity are key factors affecting the cooling effect of the vehicle. The vehicle's refrigeration system needs to be regularly inspected, cleaned, and the refrigerant exchanged. This work requires the use of refrigerant recovery and filling equipment. The common automotive refrigerant recovery and filling equipment piping system on the market generally includes several solenoid valves, refrigeration oil and refrigerant separators, compressor oil and refrigerant separators, expansion valves, several pressure switches, several one-way valves and other components. For the relevant structure, please refer to the Chinese patent publication with publication number CN218269672U, entitled "A Refrigerant Filling Machine with Automatic Pipeline Cleaning", which records:

[0003] "A refrigerant filling machine with automatic pipeline cleaning comprises a frame, a filling system, a cleaning and recovery system, and a control system. The filling system comprises a refrigerant tank, a filling port, and a recovery port. The filling port and the recovery port are respectively connected to the refrigerant tank via a filling pipe. The cleaning and recovery system comprises an oil separator. The inlet of the oil separator is connected to the refrigerant tank via a cleaning pipe. The air outlet of the oil separator is connected to the refrigerant tank via a recovery pipe. The oil outlet of the oil separator is connected to a recovery oil bottle."

[0004] This type of equipment only has simple cleaning and recycling functions and is single-function. In addition, the independent components in the existing equipment are connected through cumbersome piping to form a control system, which has complex piping connections, many production and processing links, and low production efficiency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a refrigerant cleaning, recovery and filling device and method that can realize multiple control modes, improve the integration of equipment, simplify connecting pipelines, and improve production efficiency in response to the shortcomings of the existing technology.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0007] A refrigerant cleaning, recovery and filling device, which includes a low-pressure pipeline inlet, a high-pressure pipeline inlet, a new oil bottle, an old oil bottle, an oil-gas separator, a vacuum pump, a compressor, a compressor oil separator, a condenser and a refrigerant storage tank, wherein: a first valve body and a second valve body are connected in series between the low-pressure pipeline inlet and the high-pressure pipeline inlet, and the connection point of the first valve body and the second valve body is connected to the refrigerant storage tank; a third valve body and a fourth valve body are connected in series between the low-pressure pipeline inlet and the high-pressure pipeline inlet, and the connection point of the third valve body and the fourth valve body is connected to the oil-gas separator; a fifth valve body is connected between the oil-gas separator and the old oil bottle; a seventh valve body is connected between the oil-gas separator and the vacuum pump; the oil-gas separator, the compressor, the compressor oil separator, the condenser and the refrigerant storage tank are connected in sequence; an eighth valve body is connected between the low-pressure pipeline inlet and the new oil bottle.

[0008] Preferably, a drying bottle is included, and the drying bottle is connected in series between the oil-gas separation chamber and the compressor.

[0009] Preferably, a sixth valve body is included, and the sixth valve body is connected in series to another pipeline between the compressor and the compressor oil separator.

[0010] Preferably, the oil-gas separator includes an oil-gas separation chamber and a high-temperature refrigerant accommodating chamber, and the high-temperature refrigerant accommodating chamber surrounds the outside of the oil-gas separation chamber.

[0011] Preferably, the first valve body, the second valve body, the third valve body, the fourth valve body, the fifth valve body, the sixth valve body, the seventh valve body and the eighth valve body are all solenoid valves.

[0012] Preferably, a seat body is included, and the oil-gas separator and the compressor oil separator are fixed side by side on the bottom of the seat body.

[0013] Preferably, the first valve body, the second valve body, the third valve body, the fourth valve body, the fifth valve body, the sixth valve body, the seventh valve body and the eighth valve body are fixed side by side on the seat body.

[0014] Preferably, the first valve body, the second valve body, the third valve body, the fourth valve body, the fifth valve body, the sixth valve body, the seventh valve body and the eighth valve body are all close to one side edge of the seat body.

[0015] Preferably, a valve body driving plate is fixed obliquely above the seat body, and a plurality of valve body driving devices are provided on the valve body driving plate. The plurality of valve body driving devices are electrically connected to a preset control device, and the first valve body, the second valve body, the third valve body, the fourth valve body, the fifth valve body, the sixth valve body, the seventh valve body and the eighth valve body are electrically connected to the plurality of valve body driving devices respectively.

[0016] A refrigerant cleaning, recycling and filling method, the method is implemented based on a device, the device includes a low-pressure pipeline inlet, a high-pressure pipeline inlet, a new oil bottle, an old oil bottle, an oil-gas separator, a vacuum pump, a compressor, a compressor oil separator, a condenser and a refrigerant storage tank, wherein: a first valve body and a second valve body are connected in series between the low-pressure pipeline inlet and the high-pressure pipeline inlet, and a connection point between the first valve body and the second valve body is connected to the refrigerant storage tank; a third valve body and a fourth valve body are connected in series between the low-pressure pipeline inlet and the high-pressure pipeline inlet, and a connection point between the third valve body and the fourth valve body is connected to the oil-gas separator; a fifth valve body is connected between the oil-gas separator and the old oil bottle; a seventh valve body is connected between the oil-gas separator and the vacuum pump; the oil-gas separator, the compressor, the compressor oil separator, the condenser and the refrigerant storage tank are connected in sequence; An eighth valve body is connected between the low-pressure pipeline inlet and the new oil bottle, and the method includes: a refrigerant recovery mode, opening the third valve body and the fourth valve body, starting the compressor, and then opening the fifth valve body; a vacuum mode, opening the third valve body, the fourth valve body and the seventh valve body, and starting the vacuum pump; a new oil filling mode, opening the eighth valve body; a refrigerant filling mode, opening the first valve body and the second valve body; a forward cleaning mode, the compressor is normally open, first opening the third valve body and the fourth valve body to recover the refrigerant, then closing the third valve body and the fourth valve body and opening the first valve body and the second valve body to fill the refrigerant, then closing the first valve body and opening the second valve body and the fourth valve body to perform forward cleaning; a reverse cleaning mode, the compressor is normally open, opening the first valve body and the third valve body to perform reverse cleaning.

[0017] In the refrigerant cleaning, recovery and filling device and method disclosed in the present invention, various working modes such as refrigerant recovery, vacuuming, filling new oil, filling refrigerant, forward cleaning, and reverse cleaning can be realized through electrical control of each mechanism. Compared with the existing technology, the present invention not only realizes multiple control modes, but also simplifies the piping system and improves the integration of the equipment through the reasonable arrangement of the pipelines, which helps to improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a block diagram of the composition of the refrigerant cleaning, recovery and filling device of the present invention;

[0019] FIG2 is a schematic diagram of the passage in the refrigerant recovery mode;

[0020] FIG3 is a schematic diagram of the passage in the vacuum mode;

[0021] FIG4 is a schematic diagram of the passage in the new oil filling mode;

[0022] FIG5 is a schematic diagram of the passage in the refrigerant filling mode;

[0023] Figure 6 is a schematic diagram of the pathways in forward and reverse cleaning modes;

[0024] Figure 7 is a structural diagram of the seat body, oil-gas separator, compressor oil separator and valve body. DETAILED DESCRIPTION

[0025] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

[0026] The present invention discloses a refrigerant cleaning, recycling and filling device, as shown in FIG1 , which includes a low-pressure pipeline inlet T1, a high-pressure pipeline inlet T2, a new oil bottle 1, an old oil bottle 2, an oil-gas separator 3, a vacuum pump 4, a compressor 6, a compressor oil separator 7, a condenser 8 and a refrigerant storage tank 9, wherein:

[0027] A first valve body V1 and a second valve body V2 are connected in series between the low-pressure pipeline inlet T1 and the high-pressure pipeline inlet T2, and the connection point between the first valve body V1 and the second valve body V2 is connected to the refrigerant storage tank 9;

[0028] A third valve body V3 and a fourth valve body V4 are connected in series between the low-pressure pipeline inlet T1 and the high-pressure pipeline inlet T2, and the connection point between the third valve body V3 and the fourth valve body V4 is connected to the oil-gas separator 3;

[0029] A fifth valve body V5 is connected between the oil-gas separator 3 and the used oil bottle 2;

[0030] A seventh valve body V7 is connected between the oil-gas separator 3 and the vacuum pump 4;

[0031] The oil-gas separator 3, the compressor 6, the compressor oil separator 7, the condenser 8 and the refrigerant storage tank 9 are connected in sequence;

[0032] An eighth valve body V8 is connected between the low-pressure pipeline inlet T1 and the new oil bottle 1 .

[0033] In the above structure, through the electrical control of each mechanism, various working modes such as refrigerant recovery, vacuuming, adding new oil, adding refrigerant, forward cleaning, and reverse cleaning can be realized. Please refer to Figures 2 to 6 for details:

[0034] In the refrigerant recovery mode, the third valve body V3 and the fourth valve body V4 are opened, the compressor 6 is started, and then the fifth valve body V5 is opened;

[0035] In the vacuuming mode, the third valve body V3, the fourth valve body V4 and the seventh valve body V7 are opened, and the vacuum pump 4 is started to vacuum the pipeline system;

[0036] In the new oil filling mode, the eighth valve body V8 is opened to pump the new oil in the new oil bottle 1 into the pipeline system;

[0037] In the refrigerant filling mode, the first valve body V1 and the second valve body V2 are opened to pump the refrigerant in the refrigerant storage tank 9 into the pipeline system;

[0038] In the forward cleaning mode, the compressor 6 is normally open, and the third valve body V3 and the fourth valve body V4 are first opened to recover the refrigerant. Then, the third valve body V3 and the fourth valve body V4 are closed and the first valve body V1 and the second valve body V2 are opened to add refrigerant. Then, the first valve body V1 is closed and the second valve body V2 and the fourth valve body V4 are opened to perform forward cleaning, with the delivery direction from the second valve body V2 to the fourth valve body V4.

[0039] In the reverse cleaning mode, the compressor 6 is normally open, and the first valve body V1 and the third valve body V3 are opened to perform reverse cleaning, with the conveying direction being from the first valve body V1 to the third valve body V3.

[0040] Based on the above principles, it can be seen that the present invention not only realizes multiple control modes, but also simplifies the piping system and improves the integration of the equipment through the reasonable arrangement of the piping, which helps to improve production efficiency.

[0041] In order to dry the refrigerant after the oil and gas separation, this embodiment includes a drying bottle 5 , which is connected in series between the oil and gas separation chamber and the compressor 6 .

[0042] As a preferred embodiment, this embodiment includes a sixth valve body V6, which is connected in series to another pipeline between the compressor 6 and the compressor oil separator 7. The sixth valve body V6 is used to expand the passage between the compressor 6 and the compressor oil separator 7.

[0043] In this embodiment, the oil-gas separator 3 includes an oil-gas separation chamber and a high-temperature refrigerant holding chamber, and the high-temperature refrigerant holding chamber surrounds the outside of the oil-gas separation chamber. Specifically, the high-temperature refrigerant holding chamber is an annular chamber that is entirely located outside the oil-gas separation chamber, which sequentially enhances the heat exchange capacity between the two chambers, helps improve the oil-gas separation efficiency, and also helps to cool the gaseous refrigerant. The connection relationship in this embodiment is as follows: the connection point between the third valve body V3 and the fourth valve body V4 is connected to the oil-gas separation chamber; the fifth valve body V5 is connected between the oil-gas separation chamber and the old oil bottle 2; the seventh valve body V7 is connected between the oil-gas separation chamber and the vacuum pump 4; the oil-gas separation chamber, the compressor 6, the compressor oil separator 7, and the high-temperature refrigerant holding chamber are connected in sequence; the high-temperature refrigerant holding chamber, the condenser 8, and the refrigerant storage tank 9 are connected in sequence.

[0044] As a preferred device type, the first valve body V1, the second valve body V2, the third valve body V3, the fourth valve body V4, the fifth valve body V5, the sixth valve body V6, the seventh valve body V7, and the eighth valve body V8 are all solenoid valves. However, in actual applications, the above valve bodies can also be other types of electrically controlled valves.

[0045] Please refer to FIG. 7 . In order to facilitate the integration and fixation of various components, this embodiment includes a base body 10 . The oil-gas separator 3 and the compressor oil separator 7 are fixed side by side at the bottom of the base body 10 .

[0046] Specifically, the first valve body V1, the second valve body V2, the third valve body V3, the fourth valve body V4, the fifth valve body V5, the sixth valve body V6, the seventh valve body V7, and the eighth valve body V8 are fixed side by side on the base body 10. This embodiment adopts a left-right sequential arrangement of the multiple valve bodies, which not only facilitates identification of the valve body numbers but also simplifies the layout of the top component of the base body 10.

[0047] As a preferred embodiment, the first valve body V1, the second valve body V2, the third valve body V3, the fourth valve body V4, the fifth valve body V5, the sixth valve body V6, the seventh valve body V7 and the eighth valve body V8 are all close to one side edge of the seat body 10.

[0048] Furthermore, a valve body driving plate 11 is fixed obliquely above the seat body 10, and a plurality of valve body driving devices are provided on the valve body driving plate 11. The plurality of valve body driving devices are electrically connected to a preset control device, and the first valve body V1, the second valve body V2, the third valve body V3, the fourth valve body V4, the fifth valve body V5, the sixth valve body V6, the seventh valve body V7 and the eighth valve body V8 are respectively electrically connected to the plurality of valve body driving devices.

[0049] In the above structure, the multiple valve bodies and the valve body driving plate 11 are all close to one side of the seat body 10, which helps to shorten the circuit and simplify the assembly process.

[0050] On this basis, this embodiment also proposes a refrigerant cleaning, recycling and filling method, please refer to Figure 1, the method is implemented based on a device, the device includes a low-pressure pipeline inlet T1, a high-pressure pipeline inlet T2, a new oil bottle 1, an old oil bottle 2, an oil-gas separator 3, a vacuum pump 4, a compressor 6, a compressor oil separator 7, a condenser 8 and a refrigerant storage tank 9, wherein: a first valve body V1 and a second valve body V2 are connected in series between the low-pressure pipeline inlet T1 and the high-pressure pipeline inlet T2, and the connection point of the first valve body V1 and the second valve body V2 is connected to the refrigerant storage tank 9; the low-pressure pipeline inlet A third valve body V3 and a fourth valve body V4 are connected in series between port T1 and the high-pressure pipeline inlet T2, and the connection point of the third valve body V3 and the fourth valve body V4 is connected to the oil-gas separator 3; a fifth valve body V5 is connected between the oil-gas separator 3 and the old oil bottle 2; a seventh valve body V7 is connected between the oil-gas separator 3 and the vacuum pump 4; the oil-gas separator 3, the compressor 6, the compressor oil separator 7, the condenser 8 and the refrigerant storage tank 9 are connected in sequence; an eighth valve body V8 is connected between the low-pressure pipeline inlet T1 and the new oil bottle 1, and the method includes:

[0051] Please refer to Figure 2. In the refrigerant recovery mode, the third valve body V3 and the fourth valve body V4 are opened, the compressor 6 is started, and then the fifth valve body V5 is opened. In the refrigerant recovery mode, when the third valve body V3 and the fourth valve body V4 are opened, the refrigerant first enters the oil-gas separation chamber for oil-gas separation, then enters the compressor oil separator 7 to separate from the compressor oil, and then enters the high-temperature refrigerant accommodating chamber to assist in heating the oil-gas separation chamber and improve the oil-gas separation efficiency. After condensation in the condenser 8, the refrigerant is recovered to the refrigerant storage tank 9. When the fifth valve body V5 is opened, the oil separated in the oil-gas separation chamber is recovered to the used oil bottle 2.

[0052] Please refer to FIG3 , in the vacuum mode, the third valve body V3 , the fourth valve body V4 and the seventh valve body V7 are opened, and the vacuum pump 4 is started;

[0053] Please refer to FIG4 , in the new oil filling mode, the eighth valve body V8 is opened;

[0054] Please refer to FIG5 , in the refrigerant filling mode, open the first valve body V1 and the second valve body V2;

[0055] Please refer to FIG6 . In the forward cleaning mode, the compressor 6 is normally on. First, the third valve body V3 and the fourth valve body V4 are opened to recover the refrigerant. Then, the third valve body V3 and the fourth valve body V4 are closed and the first valve body V1 and the second valve body V2 are opened to add refrigerant. Then, the first valve body V1 is closed and the second valve body V2 and the fourth valve body V4 are opened to perform forward cleaning.

[0056] Please refer to FIG. 6 , in the reverse cleaning mode, the compressor 6 is normally open, and the first valve body V1 and the third valve body V3 are opened for reverse cleaning.

[0057] In practical applications, the above method can start all working modes with one button through the control device, or can choose to start any single working mode mentioned above to meet various application requirements.

[0058] Compared with the existing technology, the present invention can realize multiple working functions such as refrigerant recovery, vacuuming, adding new oil, adding refrigerant, forward cleaning, and reverse cleaning by reasonably controlling the opening and closing of each valve body and the operating status of components such as the vacuum pump and compressor. It not only improves the overall performance of the equipment, but also makes the piping system clear and simple, which is conducive to improving production efficiency and reducing manufacturing costs.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the technical scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A refrigerant cleaning, recovery and filling device, characterized in that: It includes low-pressure pipeline inlet, high-pressure pipeline inlet, new oil bottle, old oil bottle, oil-gas separator, vacuum pump, compressor, compressor oil separator, condenser and refrigerant storage tank, among which: A first valve body and a second valve body are connected in series between the low-pressure pipeline inlet and the high-pressure pipeline inlet, and a connection point between the first valve body and the second valve body is connected to the refrigerant storage tank; A third valve body and a fourth valve body are connected in series between the low-pressure pipeline inlet and the high-pressure pipeline inlet, and a connection point between the third valve body and the fourth valve body is connected to the oil-gas separator; A fifth valve body is connected between the oil-gas separator and the old oil bottle; A seventh valve body is connected between the oil-gas separator and the vacuum pump; The oil-gas separator, the compressor, the compressor oil separator, the condenser and the refrigerant storage tank are connected in sequence; An eighth valve body is connected between the low-pressure pipeline inlet and the new oil bottle.

2. The refrigerant cleaning, recovery and filling device according to claim 1, characterized in that: A drying bottle is included, and the drying bottle is connected in series between the oil-gas separation chamber and the compressor.

3. The refrigerant cleaning, recovery and filling device according to claim 1, characterized in that: A sixth valve body is included, and the sixth valve body is connected in series to another pipeline between the compressor and the compressor oil separator.

4. The refrigerant cleaning, recovery and filling device according to claim 1, characterized in that: The oil-gas separator comprises an oil-gas separation chamber and a high-temperature refrigerant accommodating chamber, and the high-temperature refrigerant accommodating chamber surrounds the outer side of the oil-gas separation chamber.

5. The refrigerant cleaning, recovery and filling device according to claim 3, characterized in that: The first valve body, the second valve body, the third valve body, the fourth valve body, the fifth valve body, the sixth valve body, the seventh valve body and the eighth valve body are all solenoid valves.

6. The refrigerant cleaning, recovery and filling device according to claim 1, characterized in that: The utility model comprises a seat body, and the oil-gas separator and the compressor oil separator are fixed side by side at the bottom of the seat body.

7. The refrigerant cleaning, recovery and filling device according to claim 6, characterized in that: The first valve body, the second valve body, the third valve body, the fourth valve body, the fifth valve body, the sixth valve body, the seventh valve body and the eighth valve body are fixed on the seat body side by side.

8. The refrigerant cleaning, recovery and filling device according to claim 7, characterized in that: The first valve body, the second valve body, the third valve body, the fourth valve body, the fifth valve body, the sixth valve body, the seventh valve body and the eighth valve body are all close to one side edge of the seat body.

9. The refrigerant cleaning, recovery and filling device according to claim 8, characterized in that: A valve body driving plate is fixed obliquely above the seat body, and a plurality of valve body driving devices are arranged on the valve body driving plate. The plurality of valve body driving devices are all electrically connected to a preset control device, and the first valve body, the second valve body, the third valve body, the fourth valve body, the fifth valve body, the sixth valve body, the seventh valve body and the eighth valve body are electrically connected to the plurality of valve body driving devices respectively.

10. A refrigerant cleaning, recovery and filling method, characterized in that: The method is implemented based on a device, which includes a low-pressure pipeline inlet, a high-pressure pipeline inlet, a new oil bottle, an old oil bottle, an oil-gas separator, a vacuum pump, a compressor, a compressor oil separator, a condenser and a refrigerant storage tank, wherein: a first valve body and a second valve body are connected in series between the low-pressure pipeline inlet and the high-pressure pipeline inlet, and a connection point between the first valve body and the second valve body is connected to the refrigerant storage tank; a third valve body and a fourth valve body are connected in series between the low-pressure pipeline inlet and the high-pressure pipeline inlet, and a connection point between the third valve body and the fourth valve body is connected to the oil-gas separator; a fifth valve body is connected between the oil-gas separator and the old oil bottle; a seventh valve body is connected between the oil-gas separator and the vacuum pump; the oil-gas separator, the compressor, the compressor oil separator, the condenser and the refrigerant storage tank are connected in sequence; an eighth valve body is connected between the low-pressure pipeline inlet and the new oil bottle, and the method includes: In the refrigerant recovery mode, the third valve body and the fourth valve body are opened, the compressor is started, and then the fifth valve body is opened; In the vacuum pumping mode, the third valve body, the fourth valve body and the seventh valve body are opened, and the vacuum pump is started; In the new oil filling mode, the eighth valve body is opened; In the refrigerant filling mode, the first valve body and the second valve body are opened; In the forward cleaning mode, the compressor is normally open, the third valve body and the fourth valve body are first opened to recover the refrigerant, then the third valve body and the fourth valve body are closed and the first valve body and the second valve body are opened to add refrigerant, then the first valve body is closed and the second valve body and the fourth valve body are opened to perform forward cleaning; In the reverse cleaning mode, the compressor is normally open, and the first valve body and the third valve body are opened for reverse cleaning.

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