A new type of refrigerant recovery and charging device

Abstract

The present invention provides a new type of refrigerant recovery and filling device, which belongs to the field of air conditioning technology, including a heat exchanger, a compressor, a refrigerant recovery unit, a four-way valve, a gas-liquid separator, a one-way valve, an expansion valve, a filter and a liquid storage device; the design of the present invention is compact in structure, fully functional, easy to use, and can greatly save the time of refrigerant recovery and filling. The filling amount can be preset, and the filling will automatically stop when the filling amount is reached, so that unattended filling can be realized. The recovery of different types of refrigerants can be completed by switching the valve. The recovery amount can be preset to prevent the refrigerant storage tank from being overfilled and causing safety accidents.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning, in particular to a novel refrigerant recovery and charging device. Background Art

[0002] Most of the refrigerant recovery devices currently used are in the form of oil-free compressors, which are expensive, slow to recover, have a high failure rate after long-term operation, and have high repair costs once damaged. In addition, since the refrigerant collected by the oil-free compressor is hot, especially in the summer when the temperature is high, the cylinders storing the refrigerant must be cooled to prevent the cylinders from exploding. However, cooling the cylinders generally uses external water spraying, which is not only troublesome, but also ineffective. It is precisely because of these shortcomings that some users try not to buy recovery machines or try not to use them after buying them. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a new type of refrigerant recovery and filling device, which has a compact structure, complete functions, is easy to use, and can greatly save the time of refrigerant recovery and filling. The filling amount can be preset, and the filling will automatically stop when the filling amount is reached, so that unattended filling can be realized. The recovery of different types of refrigerants can be completed by switching the valve. The recovery amount can be preset to prevent the refrigerant storage tank from being overfilled and causing safety accidents.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A novel refrigerant recovery and charging device, characterized in that it comprises a heat exchanger, a compressor, a refrigerant recovery unit, a four-way valve, a gas-liquid separator, a one-way valve, an expansion valve, a filter and a liquid storage device;

[0006] The two ends of the filter are respectively connected to the liquid reservoir and the expansion valve through pipelines;

[0007] Both ends of the heat exchanger are connected to the four-way valve through pipelines respectively;

[0008] The liquid reservoir is connected to the pipeline between the heat exchanger and the four-way valve through a pipeline;

[0009] The one-way valve is connected to the pipeline between the heat exchanger and the four-way valve;

[0010] One end of the expansion valve is connected to the pipeline between the heat exchanger and the four-way valve through a pipeline;

[0011] The gas-liquid separator and the compressor are respectively connected to the four-way valve through pipelines;

[0012] The gas-liquid separator is connected to the compressor via a pipeline;

[0013] The refrigerant recovery unit is connected to the pipeline between the heat exchanger and the four-way valve through a pipeline.

[0014] Preferably, the heat exchanger is a copper tube fin heat exchanger.

[0015] Preferably, two refrigerant recovery units are provided.

[0016] Preferably, the refrigerant recovery unit includes a refrigerant storage tank, a manual valve a, a manual valve b, a manual valve c, a manual valve d and a solenoid valve; a heat exchange tube is fixedly provided in the refrigerant storage tank; the two ends of the heat exchange tube are respectively connected to the manual valve a and the manual valve b; the manual valve a and the manual valve b are connected to the pipeline between the four-way valve and the heat exchanger; the manual valve c is connected to the refrigerant storage tank through a pipeline; the two ends of the solenoid valve are respectively connected to the refrigerant storage tank and the manual valve d.

[0017] Preferably, a weight sensor is fixedly provided at the bottom of the refrigerant liquid storage tank for detecting the weight of the refrigerant liquid storage tank.

[0018] The beneficial effects of the present invention are: compact structure, complete functions, easy to use, can greatly save the time of refrigerant recovery and filling. The filling amount can be preset, and the filling will automatically stop when the filling amount is reached, so that unattended filling can be realized. The recovery of different types of refrigerants can be completed by switching the valve. The recovery amount can be preset to prevent the refrigerant storage tank from being overfilled and causing safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A structural block diagram of a novel refrigerant recovery and charging device provided in an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] Manual valve b1, manual valve a2, gas-liquid separator 3, four-way valve 4, compressor 5, refrigerant storage tank 6, heat exchanger 7, manual valve c8, solenoid valve 9, manual valve d10, check valve b11, liquid storage tank 12, filter 13, check valve d14, expansion valve 15, check valve c16, check valve a17, weight sensor 18. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that, in the description of the present invention, terms such as "center", "upper", "lower", "horizontal", "inner", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0025] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figure 1 As shown, a new type of refrigerant recovery and charging device includes a heat exchanger 7, a compressor 5, a refrigerant recovery unit, a four-way valve 4, a gas-liquid separator 3, a one-way valve, an expansion valve 15, a filter 13 and a liquid reservoir 12; the two ends of the filter 13 are connected to the liquid reservoir 12 and the expansion valve 15 through pipelines respectively; the two ends of the heat exchanger 7 are connected to the four-way valve 4 through pipelines respectively; the liquid reservoir 12 is connected to the pipeline between the heat exchanger 7 and the four-way valve 4 through a pipeline; the one-way valve is connected to the pipeline between the heat exchanger 7 and the four-way valve 4; one end of the expansion valve 15 is connected to the pipeline between the heat exchanger 7 and the four-way valve 4 through a pipeline; the gas-liquid separator 3 and the compressor 5 are connected to the four-way valve 4 through pipelines respectively; the gas-liquid separator 3 and the compressor 5 are connected through pipelines; the refrigerant recovery unit is connected to the pipeline between the heat exchanger 7 and the four-way valve 4 through a pipeline.

[0027] Furthermore, the heat exchanger 7 is a copper tube fin type heat exchanger 7.

[0028] Furthermore, two refrigerant recovery units are provided; the refrigerant recovery unit includes a refrigerant storage tank 6, a manual valve a2, a manual valve b1, a manual valve c8, a manual valve d10 and a solenoid valve 9; a heat exchange tube is fixedly provided in the refrigerant storage tank 6; the two ends of the heat exchange tube are respectively connected to the manual valve a2 and the manual valve b1; the manual valve a2 and the manual valve b1 are connected to the pipeline between the four-way valve 4 and the heat exchanger 7; the manual valve c8 is connected to the refrigerant storage tank 6 through a pipeline; the manual valve c8 is connected to the refrigerant storage tank 6 through a pipeline; the two ends of the solenoid valve 9 are respectively connected to the refrigerant storage tank 6 and the hand valve d10.

[0029] Furthermore, four one-way valves are provided, including one-way valve a17, one-way valve b11, one-way valve c16 and one-way valve d14; the two ends of the one-way valve a17 are respectively connected to the four-way valve 4 and the liquid reservoir 12; the two ends of the one-way valve b11 are respectively connected to the liquid reservoir 12 and the heat exchanger 7; the two ends of the one-way valve c16 are respectively connected to the expansion valve 15 and the four-way valve 4; the two ends of the one-way valve d14 are respectively connected to the expansion valve 15 and the heat exchanger 7.

[0030] Furthermore, the refrigerant storage tank 6 is provided with refrigerant; the heat exchanger 7 and the pipeline between the heat exchanger 7 and the four-way valve 4 are filled with refrigerant.

[0031] During use, when the refrigerant needs to be recovered, the four-way valve 4 is powered off, the compressor 5 is running, and the high-temperature and high-pressure refrigerant is cooled in the fin heat exchanger 7 to become a refrigerant liquid, and passes through the one-way valve b11 to enter the liquid storage 12, and then passes through the filter 13, the expansion valve 15, and the one-way valve c16 to enter the heat exchange pipe in the refrigerant storage tank 6 to evaporate and absorb heat, refrigerate the refrigerant in the refrigerant storage tank 6, and reduce the temperature and pressure of the refrigerant. The refrigerant gas coming out of the heat exchange pipe in the refrigerant storage tank 6 passes through the four-way valve 4, and then enters the gas-liquid separator 3 and the air inlet of the compressor 5 in turn.

[0032] When it is necessary to complete the refrigerant filling of the machine, the four-way valve 4 is energized, the compressor 5 is running, and the high-temperature and high-pressure refrigerant condenses in the heat exchange tube of the refrigerant storage tank 6 to become refrigerant liquid, and releases heat to the refrigerant in the refrigerant storage tank 6, raising the temperature and pressure of the refrigerant in the refrigerant storage tank 6. The refrigerant liquid coming out of the heat exchange tube in the refrigerant storage tank 6 enters the liquid storage tank 12 through the one-way valve a17, and then passes through the filter 13, the expansion valve 15, and the one-way valve d14 to enter the fin heat exchanger 7 to evaporate and become refrigerant gas. The gas coming out of the fin heat exchanger 7 passes through the four-way valve 4, and then enters the gas-liquid separator 3 and the air inlet of the compressor 5 in turn. Since the refrigerant in the refrigerant storage tank 6 is heated and the temperature and pressure are increased, the refrigerant being filled passes through the solenoid valve 9, the manual valve b1 or the solenoid valve 9, the manual valve d10 under the action of the pressure difference and enters the equipment being filled, completing the filling. When the preset filling amount is reached, the solenoid valve 9 will automatically close and stop filling.

[0033] The solenoid valve 9, the manual valve a2 and the manual valve b1 are used to charge different types of refrigerants, and are connected with a charging electric valve for automatic charging of the refrigerant.

[0034] The design of the present invention is compact in structure, fully functional, easy to use, and can greatly save the time of refrigerant recovery and filling. The filling amount can be preset, and the filling will automatically stop when the filling amount is reached, so that unattended filling can be realized. Different types of refrigerants can be recovered by switching the valve. The recovery amount can be preset to prevent the refrigerant storage tank from being overfilled and causing safety accidents.

[0035] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A new type of refrigerant recovery and charging device, characterized in that: It includes a heat exchanger, a compressor, a refrigerant recovery unit, a four-way valve, a gas-liquid separator, a one-way valve, an expansion valve, a filter and a liquid receiver; The two ends of the filter are respectively connected to the liquid reservoir and the expansion valve through pipelines; Both ends of the heat exchanger are connected to the four-way valve through pipelines respectively; The liquid reservoir is connected to the pipeline between the heat exchanger and the four-way valve through a pipeline; The one-way valve is connected to the pipeline between the heat exchanger and the four-way valve; One end of the expansion valve is connected to the pipeline between the heat exchanger and the four-way valve through a pipeline; The gas-liquid separator and the compressor are respectively connected to the four-way valve through pipelines; The gas-liquid separator is connected to the compressor via a pipeline; The refrigerant recovery unit is connected to the pipeline between the heat exchanger and the four-way valve through a pipeline.

2. A novel refrigerant recovery and charging device as claimed in claim 1, characterized in that: The heat exchanger is a copper tube fin type heat exchanger.

3. A novel refrigerant recovery and charging device as claimed in claim 1, characterized in that: The refrigerant recovery units are provided with two.

4. A novel refrigerant recovery and charging device as claimed in claim 3, characterized in that: The refrigerant recovery unit includes a refrigerant storage tank, a manual valve a, a manual valve b, a manual valve c, a manual valve d and a solenoid valve; a heat exchange tube is fixedly arranged in the refrigerant storage tank; the two ends of the heat exchange tube are respectively connected to the manual valve a and the manual valve b; the manual valve a and the manual valve b are connected to the pipeline between the four-way valve and the heat exchanger; the manual valve c is connected to the refrigerant storage tank through a pipeline; the two ends of the solenoid valve are respectively connected to the refrigerant storage tank and the manual valve d.

5. A novel refrigerant recovery and charging device as claimed in claim 4, characterized in that: A weight sensor is fixedly provided at the bottom of the refrigerant liquid storage tank for detecting the weight of the refrigerant liquid storage tank.

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