Refrigerant recovery device

Abstract

The present invention relates to a refrigerant recovery device, comprising an air-cooled heat exchanger, a control box, a compressor having an input port and an output port, a recovery structure, a first pipeline connected to an external device and the air-cooled heat exchanger, a second pipeline connected to the air-cooled heat exchanger and the input port of the compressor, a third pipeline connected to the output port of the compressor and the air-cooled heat exchanger, a fourth pipeline connected to the air-cooled heat exchanger and the recovery structure, and a detection device for detecting the superheat of the refrigerant output by the external device. A first control valve is provided on the first pipeline, which automatically adjusts its opening according to the superheat of the refrigerant. The control box is connected to the first control valve and the detection device and is configured to adjust the opening of the first control valve according to the superheat of the refrigerant. This refrigerant recovery device achieves automatic recovery, reduces tedious manual operations, and has the advantages of being easy to operate, safe, and reliable.

Description

Technical Field

[0001] The present invention relates to the field of refrigerant recovery, and more particularly to a refrigerant recovery device. Background Art

[0002] The refrigerant recovery device in the related art mainly includes a compressor, a recovery structure (such as a recovery bottle), recovery pipelines corresponding to different forms of refrigerants (such as liquid refrigerant recovery pipelines and gaseous refrigerant recovery pipelines), etc. When recovering refrigerants in different forms, it is usually necessary to manually switch the gas mode or liquid mode to adapt to refrigerants in different states, or it is necessary to identify the refrigerant state in advance to select the mode. Therefore, the refrigerant recovery device in the related art requires too much human intervention and has a low degree of automation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an improved refrigerant recovery device.

[0004] The technical solution adopted by the present invention to solve the technical problem is: constructing a refrigerant recovery device, including an air-cooled heat exchanger, a control box, a compressor having an input port and an output port, a recovery structure, a first pipeline connected to an external device and the air-cooled heat exchanger, a second pipeline connected to the air-cooled heat exchanger and the input port of the compressor, a third pipeline connected to the output port of the compressor and the air-cooled heat exchanger, a fourth pipeline connected to the air-cooled heat exchanger and the recovery structure, and a detection device for collecting the superheat of the refrigerant output by the external device;

[0005] A first control valve that automatically adjusts its opening according to the superheat of the refrigerant is provided on the first pipeline; the control box is connected to the first control valve and the detection device, and is configured to adjust the opening of the first control valve according to the superheat of the refrigerant.

[0006] In some embodiments, the first control valve is a solenoid valve.

[0007] In some embodiments, the detection device includes a temperature detection structure provided on the second pipeline and connected to the control box, and a second pressure detection structure provided on the second pipeline and connected to the control box.

[0008] In some embodiments, a second control valve is provided on the first pipeline;

[0009] The second control valve is spaced apart from the first control valve, and a distance from the first control valve to the air-cooled heat exchanger is smaller than a distance from the second control valve to the air-cooled heat exchanger.

[0010] In some embodiments, a drying filter for drying the refrigerant is provided on the first pipeline;

[0011] The drying filter is disposed between the first control valve and the second control valve.

[0012] In some embodiments, a first sight glass is provided on the first pipeline and between the drying filter and the first control valve;

[0013] And / or a first pressure detection structure is provided on the first pipeline and between the first control valve and the air-cooled heat exchanger.

[0014] In some embodiments, a third control valve is provided on the third pipeline;

[0015] And / or, a high-pressure switch is provided on the third pipeline.

[0016] In some embodiments, a fourth control valve and a second sight glass are provided on the fourth pipeline; the second sight glass is located between the fourth control valve and the air-cooled heat exchanger.

[0017] In some embodiments, a third pressure detection structure is provided on the fourth pipeline;

[0018] And / or, a pressure relief structure is provided on the fourth pipeline.

[0019] In some embodiments, the air-cooled heat exchanger includes a box;

[0020] A walking mechanism is provided on the box body.

[0021] The implementation of the refrigerant recovery device of the present invention has the following beneficial effects: the refrigerant recovery device is provided with a detection device connected to the control box and a first control valve connected to the control box on the first pipeline. During the refrigerant recovery process, the first control box adjusts the opening of the first control valve according to the superheat of the refrigerant collected by the detection device, thereby ensuring that refrigerants in different forms can be recovered normally, thereby eliminating the need for manual switching of switches, thereby achieving an automatic recovery function, reducing tedious human intervention or operation, and facilitating automated implementation. In addition, by providing an air-cooled heat exchanger, when recovering liquid refrigerant, the liquid refrigerant can be evaporated to form a gaseous state and then compressed by a compressor and then recovered to the recovery structure. When recovering gaseous refrigerant, the gaseous refrigerant can directly pass through and be compressed by the compressor and then recovered to the recovery structure. This process does not need to consider the liquid compression of the compressor and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0023] Figure 1 is a schematic structural diagram of a refrigerant recovery device in some embodiments of the present invention;

[0024] Figure 2 yes Figure 1 A schematic diagram of a partial structure of a refrigerant recovery device is shown;

[0025] Figure 3 yes Figure 1 Another partial structural schematic diagram of the refrigerant recovery device shown;

[0026] Figure 4 yes Figure 1 The schematic diagram of the refrigerant recovery unit is shown. DETAILED DESCRIPTION

[0027] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0028] Figure 1 Some preferred embodiments of the refrigerant recovery device of the present invention are shown. The refrigerant recovery device can be used to automatically recover gaseous refrigerant and liquid refrigerant, and has the advantages of being easy to operate and safe and reliable to operate.

[0029] like Figures 1 to 3 As shown, in some embodiments, the refrigerant recovery device includes an air-cooled heat exchanger 10, a control box 20, a first pipeline 30, a second pipeline 40, a third pipeline 50, a compressor 60, a fourth pipeline 70, and a recovery structure 80. The air-cooled heat exchanger 10 can be used to cool the refrigerant. The control box 20 is mounted on the air-cooled heat exchanger 10. The first pipeline 30 can be connected to an external device and the air-cooled heat exchanger 10, and is used to output the refrigerant output by the external device to the air-cooled heat exchanger 10. The second pipeline 40 is disposed between the compressor 60 and the air-cooled heat exchanger 10, and is used to connect the compressor 60 and the air-cooled heat exchanger 10, thereby transporting the refrigerant output by the air-cooled heat exchanger 10 to the compressor 60, where it is compressed and output. The third pipeline 50 is disposed between the compressor 60 and the air-cooled heat exchanger 10, and is used to transport the refrigerant compressed and output by the compressor 60 to the air-cooled heat exchanger 10 for further cooling. The fourth pipeline 70 is disposed between the air-cooled heat exchanger 10 and the recovery structure 80 , and is used to transport the coolant output from the air-cooled heat exchanger 10 to the recovery structure 80 for recovery by the recovery structure 80 .

[0030] Furthermore, in some embodiments, the air-cooled heat exchanger includes a housing 11, a heat exchange assembly 12, and a fan 13. The housing 11 can be a rectangular parallelepiped and a hollow structure, with a receiving cavity 111 formed inside for receiving the heat exchange assembly 12 and the compressor 60. The housing 11 includes a first side panel 112, a second side panel 113, a top panel 114, a bottom panel 115, a third side panel 116, and a fourth side panel 117. The first side panel 112 and the second side panel 113 are arranged opposite to each other. The top panel 114 is located between the first side panel 112 and the second side panel 113, and the bottom panel 115 is located between the first side panel 112 and the second side panel 113. The top panel 114 and the bottom panel 115 are arranged opposite to each other. The third side plate 116 and the fourth side plate 117 are arranged opposite to each other, and the third side plate 116 is arranged between the top plate 114 and the bottom plate 115; the fourth side plate 117 is arranged between the top plate 114 and the bottom plate 115. The first side plate 112, the second side plate 113, the top plate 114, the bottom plate 115, the third side plate 116 and the fourth side plate 117 can be fixed by welding to form a rectangular parallelepiped structure. The control box 20 can be arranged on the third side plate 116. The heat exchange component 12 is placed in the receiving cavity 110 and is arranged close to the first side plate 112. The heat exchange component 12 is a conventional heat exchange device, such as a coil. The heat exchange component 12 has an evaporating end and a condensing end. The fan 13 is arranged on the third side plate 116 for heat dissipation and cooling of the heat exchange component 12.

[0031] Furthermore, in some embodiments, a travel mechanism 14 is provided on the housing 11. The travel mechanism 14 facilitates the movement of the entire refrigerant recovery device to different locations, thereby making the refrigerant recovery device more convenient to use. The travel mechanism 14 may include four universal wheels, which are provided at the four corners of the bottom plate 115.

[0032] like Figures 2 to 4 As shown, the first pipeline 30 is disposed on the fourth side plate 117. One end of the first pipeline 30 can be connected to an external device, and the other end can be connected to the evaporation end of the air-cooled heat exchanger 10. In some embodiments, the first pipeline 30 can be a steel pipe. Of course, it is understood that in other embodiments, the first pipeline 30 is not limited to a steel pipe.

[0033] The first pipeline 30 is provided with a first control valve 31, a second control valve 32, a filter drier 33, and a first sight glass 34. The first control valve 31 and the second control valve 32 are spaced apart. The first control valve 31 is located closer to the air-cooled heat exchanger 10 than the second control valve 32. That is, the distance between the first control valve 31 and the air-cooled heat exchanger 10 is shorter than the distance between the second control valve 32 and the air-cooled heat exchanger 10. The second control valve 32 is located closer to the external device. The first control valve 31 is an electronic valve, specifically a solenoid valve. It can be connected to the control box 20, which can adjust the opening of the first control valve 31 based on the superheat of the refrigerant. In other words, the opening of the first control valve 31 can be automatically adjusted, ensuring that refrigerant in different forms can be properly recovered without the need for manual switching, thus achieving automatic recovery and reducing tedious manual operations. The second control valve 32 can be a ball valve. The filter dryer 33 is located between the first control valve 31 and the second control valve 32 and is used to dry and filter the refrigerant, thereby removing moisture and / or impurities from the refrigerant, resulting in a purer recovered refrigerant. The first sight glass 34 is located between the filter dryer 33 and the first control valve 31. By observing the first sight glass 34, the purity of the refrigerant after filtration by the filter dryer 33 can be easily observed. It is understood that in other embodiments, the filter dryer 33 and / or the first sight glass 34 may be omitted. Furthermore, in some embodiments, a first pressure detection structure 35 is provided on the first pipeline 30. This first pressure detection structure 35 is located between the first control valve 31 and the air-cooled heat exchanger 10 and is used to detect the pressure of the refrigerant being delivered to the air-cooled heat exchanger 10. In some embodiments, this first pressure detection structure 35 may be a pressure gauge. It is understood that in other embodiments, this first pressure detection structure 35 is not limited to a pressure gauge.

[0034] The refrigerant outputted from the external device may sequentially pass through the second control valve 32, the drying filter 33, the first sight glass 34, the first control valve 31, and the first pressure detection structure 35, and then enter the evaporation end of the air-cooled heat exchanger 10. If the refrigerant is in liquid state, it may be evaporated to form a gas.

[0035] One end of the second pipe 40 can be connected to the evaporation end of the air-cooled heat exchanger 10, and the other end can be connected to the input port of the compressor 60. The refrigerant output from the air-cooled heat exchanger 10 can be delivered to the compressor 60 through the second pipe 40. In some embodiments, the second pipe 40 can be a steel pipe.

[0036] In some embodiments, the refrigerant recovery device further includes a detection device, which is disposed on the second pipeline 40 and connected to the control box 20. The detection device can be used to detect the superheat of the refrigerant output by the external device and feedback it to the control box 20. It should be noted that the superheat of refrigerants in different forms can vary. Of course, it is understood that in other embodiments, the detection device may not be limited to being disposed on the second pipeline 40. When the refrigerant recovery device recovers refrigerant, the opening of the first control valve 31 is first adjusted to a first opening. This first opening is a small opening, allowing only a small amount of refrigerant to pass through. The refrigerant enters the air-cooled heat exchanger 10 along the first pipeline 30 and is then output from the air-cooled heat exchanger 10 to the second pipeline 40. After passing through the detection device, the detection device detects the superheat of the refrigerant and feedbacks it to the control box 20. The control box 20 can adjust the opening of the first control valve 31 based on the superheat. If the refrigerant is in a liquid state, the opening of the first control valve 31 is adjusted to a second opening, which is larger than the first opening. If the refrigerant is in a gaseous state, the opening of the first control valve 31 is adjusted to a third opening, which is greater than the second opening and the first opening.

[0037] Furthermore, in some embodiments, the detection device includes a temperature detection structure 41 and a second pressure detection structure 42; the temperature detection structure 41 and the second pressure detection structure 42 are arranged at intervals on the second pipeline 40. The temperature detection structure 41 is arranged closer to the air-cooled heat exchanger 10 than the second pressure detection structure 42. The temperature detection structure 41 and the second pressure detection structure 42 are respectively connected to the control box 20. The temperature detection structure 41 can be a conventional temperature sensor, which can be attached to the wall of the second pipeline 40 to detect the temperature of the refrigerant in the second pipeline 40 and feed back to the control box 20. The second pressure detection structure 42 can be a conventional low-pressure sensor, which is fixed to the second pipeline 40 by setting a connection structure or welding, and can detect the pressure of the refrigerant in the second pipeline 40 and feed back to the control box 20.

[0038] One end of the third pipeline 50 can be connected to the output port of the compressor 60, and the other end can be connected to the condensing end of the air-cooled heat exchanger 10. The third pipeline 50 can be used to transport the refrigerant output from the compressor 60 to the air-cooled heat exchanger 10 for cooling. The third pipeline 50 can be a steel pipe. Of course, it is understood that in other embodiments, the third pipeline 50 is not limited to a steel pipe. The third pipeline 50 is provided with a third control valve 51 and a high-pressure switch 52. The third control valve 51 and the high-pressure switch 52 can both be connected to the control box 20 and bypass the third pipeline 50. The third control valve 51 and the high-pressure switch 52 are spaced apart, with the third control valve 51 being located closer to the compressor 60. The third control valve 51 can be a one-way valve. The high-pressure switch 52 can be used to provide a shutdown protection function when the refrigerant pressure exceeds a high-pressure protection value.

[0039] The compressor 60 can be a conventional compressor. The compressor 60 is installed in the receiving cavity 111 of the box body 11 . The compressor 60 has an input port and an output port, wherein the input port is connected to the second pipeline 40 , and the output port is connected to the third pipeline 50 .

[0040] In some embodiments, the fourth pipeline 70 is arranged on the fourth side plate 117, one end of which is connected to the condensing end of the air-cooled heat exchanger 10, and the other end of which can be connected to the recovery structure 80. The fourth pipeline 70 can be a steel pipe. The fourth pipeline 70 is provided with a third pressure detection structure 71, a pressure relief structure 72, a second sight glass 73, and a fourth control valve 74. The third pressure detection structure 71, the pressure relief structure 72, the second sight glass 73 and the fourth control valve 74 are arranged in sequence along the flow direction of the refrigerant and bypass the fourth pipeline 70. The third pressure detection structure 71 can be a pressure gauge, which can be connected to the control box 20 to detect the pressure of the refrigerant output by the fourth pipeline 70. Of course, it can be understood that in some other embodiments, the third pressure detection structure 71 is not limited to a pressure gauge. The pressure relief structure 72 can be a pressure relief valve connected to the control box 20. When the pressure in the fourth pipeline 70 reaches a pressure relief value, the pressure relief structure 72 opens and automatically releases pressure, thereby protecting the refrigerant recovery device. The second sight glass 73 can be used to observe whether the output refrigerant contains impurities and / or water vapor. The fourth control valve 74 is a ball valve. Of course, it is understood that the fourth control valve 74 is not limited to a ball valve.

[0041] In some embodiments, the recovery structure 80 is disposed outside the box 11 and connected to the fourth pipe 70. The recovery structure 80 can be a recovery bottle. Of course, it can be understood that in other embodiments, the recovery structure 80 is not limited to a recovery bottle.

[0042] It is understandable that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A refrigerant recovery device, characterized in that: The invention comprises an air-cooled heat exchanger (10), a control box (20), a compressor (60) having an input port and an output port, a recovery structure (80), a first pipeline (30) connected to an external device and the air-cooled heat exchanger (10), a second pipeline (40) connected to the air-cooled heat exchanger (10) and the input port of the compressor (60), a third pipeline (50) connected to the output port of the compressor (60) and the air-cooled heat exchanger (10), a fourth pipeline (70) connected to the air-cooled heat exchanger (10) and the recovery structure (80), and a detection device for collecting the superheat of the refrigerant output by the external device; The first pipeline (30) is provided with a first control valve (31) that automatically adjusts the opening according to the superheat of the refrigerant; the control box (20) is connected to the first control valve (31) and the detection device, and is configured to adjust the opening of the first control valve (31) according to the superheat of the refrigerant.

2. The refrigerant recovery device according to claim 1, characterized in that: The first control valve (31) is a solenoid valve.

3. The refrigerant recovery device according to claim 1, characterized in that: The detection device comprises a temperature detection structure (41) provided on the second pipeline (40) and connected to the control box (20), and a second pressure detection structure (42) provided on the second pipeline (40) and connected to the control box (20).

4. The refrigerant recovery device according to claim 1, characterized in that: A second control valve (32) is provided on the first pipeline (30); The second control valve (32) is spaced apart from the first control valve (31), and the distance from the first control valve (31) to the air-cooled heat exchanger (10) is smaller than the distance from the second control valve (32) to the air-cooled heat exchanger (10).

5. The refrigerant recovery device according to claim 4, characterized in that: The first pipeline (30) is provided with a drying filter (33) for drying the refrigerant; The drying filter (33) is arranged between the first control valve (31) and the second control valve (32).

6. The refrigerant recovery device according to claim 5, characterized in that: A first sight glass (34) is provided on the first pipeline (30) and located between the drying filter (33) and the first control valve (31); And / or a first pressure detection structure (35) is provided on the first pipeline (30) and between the first control valve (31) and the air-cooled heat exchanger (10).

7. The refrigerant recovery device according to claim 1, characterized in that: The third pipeline (50) is provided with a third control valve (51); And / or, a high-pressure switch (52) is provided on the third pipeline (50).

8. The refrigerant recovery device according to claim 1, characterized in that: A fourth control valve (74) and a second sight glass (73) are provided on the fourth pipeline (70); the second sight glass (73) is located between the fourth control valve (74) and the air-cooled heat exchanger (10).

9. The refrigerant recovery device according to claim 8, characterized in that: The fourth pipeline (70) is provided with a third pressure detection structure (71); And / or, a pressure relief structure (72) is provided on the fourth pipeline (70).

10. The refrigerant recovery device according to claim 1, characterized in that: The air-cooled heat exchanger (10) comprises a box (11); The box body (11) is provided with a walking mechanism (14).

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