Refrigerant recovery device

Abstract

The invention discloses a refrigerant recovery device which comprises a shell structure, the shell structure comprises a rectangular shell, the rectangular shell comprises a plurality of vertical plates, a top plate and a base, and the vertical plates are fixedly connected to the periphery of the top plate and the periphery of the base through I-shaped steel and bolts to form an integrated structure; the heat exchange structure comprises a water tank arranged in the rectangular shell, two sets of heat exchange copper pipes are arranged in the water tank, one set of heat exchange copper pipes are evaporation heat exchange pipes, the other set of heat exchange copper pipes are condensation heat exchange pipes, and heat of the condensation heat exchange pipes is transmitted to the evaporation heat exchange pipes through medium water, so that refrigerants in the evaporation heat exchange pipes are completely evaporated into a gas state; and meanwhile, the refrigerant in the condensation heat exchange pipe is changed into a liquid state, and the liquid refrigerant enters an external fluorine tank through the drying filter to be stored. Through the synergistic effect of the evaporation heat exchange pipe and the condensation heat exchange pipe, a refrigerant can be completely gasified or liquefied in the heat exchange process, and therefore more efficient refrigerant recovery is achieved.

Description

Technical Field

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

[0002] In industry, laboratories and special places, a high-precision constant temperature and humidity environment is essential for the stable operation of equipment and products. Traditional air-conditioning systems use temperature and humidity sensors in conjunction with compressors and evaporators to adjust environmental parameters, but when it comes to refrigerant recovery, efficient and environmentally friendly Freon collection is usually not possible, resulting in energy waste and environmental pollution. With the improvement of environmental protection requirements, the recovery and reuse of Freon has become an important research direction.

[0003] Existing refrigerant recovery equipment often has problems such as low efficiency and incomplete refrigerant recovery, which makes it difficult to meet the high-precision requirements of precision air-conditioning systems. Therefore, designing a constant temperature and humidity air-conditioning equipment that is efficient, environmentally friendly, and can effectively recover refrigerants has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems existing in the existing refrigerant recovery device, the present invention is proposed.

[0006] Therefore, an object of the present invention is to provide a refrigerant recovery device, which, through the synergistic effect of evaporation heat exchange tubes and condensation heat exchange tubes, enables the refrigerant to be completely vaporized or liquefied during the heat exchange process, thereby achieving more efficient refrigerant recovery.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a refrigerant recovery device, comprising:

[0008] The shell structure comprises a rectangular shell, wherein the rectangular shell comprises a plurality of vertical plates, a top plate and a base, and the plurality of vertical plates are respectively fixedly connected to the top plate and the base around by I-shaped steel and bolts to form an integrated structure;

[0009] The heat exchange structure includes a water tank disposed in a rectangular shell, wherein two groups of heat exchange copper tubes are disposed in the water tank, one group is an evaporation heat exchange tube, and the other group is a condensation heat exchange tube, and the heat of the condensation heat exchange tube is transferred to the evaporation heat exchange tube through the medium water, so that the refrigerant in the evaporation heat exchange tube is completely evaporated into a gaseous state, and the refrigerant in the condensation heat exchange tube is turned into a liquid state, and the liquid refrigerant enters an external fluorine tank through a drying filter for storage;

[0010] The fluorine recovery structure includes a recovery pipe, a compressor and a gas-liquid separator. The compressor is connected to the gas-liquid separator. The mixture of refrigerant liquid, gas and oil is completely converted into gas through the evaporation heat exchange pipe and the recovery pipe, and then enters the gas-liquid separator, and then enters the compressor to be compressed into high-temperature and high-pressure gas. The rectangular shell is also provided with an oil separator and a heat exchanger. The high-temperature and high-pressure gas passes through the oil separator and enters the heat exchanger to dissipate excess heat and become a two-phase refrigerant. It is then converted into a high-pressure liquid refrigerant through the heat exchange structure and enters the fluorine tank to complete the cycle of fluorine collection.

[0011] As a preferred solution of the refrigerant recovery device of the present invention, the condensing heat exchange pipe in the water tank is connected to a refrigerant discharge pipe, the drying filter is connected to the refrigerator discharge pipe, a needle valve is also provided on the outer wall of the refrigerant discharge pipe, and the output end of the refrigerant discharge pipe is connected to an external fluorine tank.

[0012] As a preferred solution of the refrigerant recovery device of the present invention, wherein: the output end of the evaporation heat exchange tube in the water tank is connected to the recovery tube, and a low-pressure sensor for monitoring the internal pressure is provided on the side wall of the recovery tube, the output end of the gas-liquid separator is connected to a guide tube, the compressor is connected to the guide tube, a high-pressure switch is provided on the outer side wall of the guide tube, and the output end of the guide tube is connected to the oil separator.

[0013] As a preferred solution of the refrigerant recovery device of the present invention, a sight glass is provided on the side wall of the oil separator, and a temperature protector is connected to the outer side wall of the guide tube.

[0014] As a preferred embodiment of the refrigerant recovery device of the present invention, the output end of the oil separator is connected to an air duct, a one-way valve is provided on the side wall of the air duct, and a high-pressure sensor is also connected to the outer wall of the air duct, the output end of the air duct is connected to a heat exchanger, the heat exchanger is equipped with an EC fan, and the output end of the air duct is connected to the condensation heat exchange pipe in the water tank.

[0015] As a preferred solution of the refrigerant recovery device of the present invention, the recovery port of the recovery pipe is connected to an external air conditioner for recovering fluorine, and the gas is sucked into the gas-liquid separator by the suction force of the compressor.

[0016] As a preferred embodiment of the refrigerant recovery device of the present invention, the method for using the refrigerant recovery device comprises the following steps:

[0017] Step 1: There are two groups of heat exchange copper tubes in the water tank, one group is the evaporation heat exchange tube, and the other group is the condensation heat exchange tube; the heat of the condensation heat exchange tube is transferred to the evaporation heat exchange tube through the medium water, so that the refrigerant in the evaporation heat exchange tube is completely evaporated into gaseous state, and at the same time, the high-pressure refrigerant in the condensation heat exchange tube becomes liquid. The liquid refrigerant enters the fluorine tank through the drying filter for storage;

[0018] Step 2: The refrigerant recovery port is connected to the air conditioner that needs to recover fluorine. Through the suction of the compressor, the mixture of refrigerant liquid, gas and oil is completely converted into gas through the evaporation heat exchange tube, enters the gas-liquid separator, and then enters the compressor to be compressed into high-temperature and high-pressure gas;

[0019] Step 3: The high-temperature and high-pressure gas passes through the oil separator accessory and enters the heat exchanger of the EC fan to dissipate excess heat and become a two-phase refrigerant. It then enters the water tank for heat exchange and becomes a high-pressure liquid refrigerant and enters the fluorine tank. The whole process is repeated to complete the fluorine collection action.

[0020] Beneficial effects of the present invention:

[0021] 1. Efficient refrigerant recovery: The device uses the synergistic effect of the evaporation heat exchange tube and the condensation heat exchange tube to enable the refrigerant to be completely vaporized or liquefied during the heat exchange process, thereby achieving more efficient refrigerant recovery.

[0022] 2. High precision of temperature and humidity control: The heat exchange structure transfers heat through the medium water, making the temperature control more stable and precise, which helps to maintain the high stability of the constant temperature and humidity environment and meet the application scenarios with high requirements for temperature and humidity accuracy.

[0023] 3. Environmental protection: The fluorine collection system designed for this device can efficiently recover and preserve Freon, reduce pollution to the environment, meet modern environmental protection requirements, and at the same time, reduce the waste of refrigerant and improve the energy efficiency of the equipment.

[0024] 4. Structural design optimization: The shell structure adopts a combination of multiple vertical plates, top plates and bases to ensure the stability and durability of the equipment, which is suitable for industrial environments. The fixation with I-shaped steel and bolts improves the seismic resistance and long-term operation reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 creative labor. Among them:

[0026] Figure 1It is a schematic diagram of the overall structure of the refrigerant recovery device of the present invention.

[0027] Figure 2 It is a side structural schematic diagram of the refrigerant recovery device of the present invention.

[0028] Figure 3 It is a schematic diagram of the internal cross-sectional structure of the refrigerant recovery device of the present invention.

[0029] Figure 4 It is a schematic diagram of the side cross-sectional structure of the refrigerant recovery device of the present invention.

[0030] Figure 5 It is a schematic diagram of the structural principle of the refrigerant recovery device of the present invention. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0035] Reference Figure 1-5 , provides a refrigerant recovery device, comprising:

[0036] The shell structure 100, the heat exchange structure 200 and the fluorine recovery structure 300, the shell structure 100 includes a rectangular shell 101, the rectangular shell 101 includes a plurality of vertical plates, a top plate and a base, and the plurality of vertical plates are fixedly connected to the top plate and the base by I-shaped steel and bolts to form an integrated structure;

[0037] The heat exchange structure 200 includes a water tank 201 disposed in a rectangular shell 101, and two groups of heat exchange copper tubes are disposed in the water tank 201, one group is an evaporation heat exchange tube 202, and the other group is a condensation heat exchange tube 203, and the heat of the condensation heat exchange tube 203 is transferred to the evaporation heat exchange tube 202 through the medium water, so that the refrigerant in the evaporation heat exchange tube 202 is completely evaporated into a gaseous state, and at the same time, the refrigerant in the condensation heat exchange tube 203 becomes a liquid state, and the liquid refrigerant enters an external fluorine tank through a drying filter for storage; specifically, the output end of the evaporation heat exchange tube 202 in the water tank 201 is connected to the recovery pipe, and a low-pressure sensor for monitoring the internal pressure is disposed on the side wall of the recovery pipe, and the output end of the gas-liquid separator 302 is connected to a guide pipe, The compressor 301 is connected to the guide pipe, a high-pressure switch is provided on the outer wall of the guide pipe, and the output end of the guide pipe is connected to the oil separator, a sight glass is provided on the side wall of the oil separator, and a temperature protector is connected to the outer wall of the guide pipe. Specifically, the output end of the oil separator is connected to the air guide pipe, a one-way valve is provided on the side wall of the air guide pipe, and a high-pressure sensor is also connected to the outer wall of the air guide pipe. The output end of the air guide pipe is connected to the heat exchanger 304, the heat exchanger 304 is equipped with an EC fan 305, and the output end of the air guide pipe is connected to the condensation heat exchange pipe 203 in the water tank 201. Furthermore, the recovery port of the recovery pipe is connected to the external air conditioner to recover fluorine, and the gas is sucked into the gas-liquid separator 302 through the suction force of the compressor 301.

[0038] Among them, the fluorine recovery structure 300 includes a recovery pipe, a compressor 301 and a gas-liquid separator 302. The compressor 301 is connected to the gas-liquid separator 302. The mixture of refrigerant liquid, gas and oil is completely converted into gas after passing through the evaporation heat exchange pipe 202 and the recovery pipe, and then enters the gas-liquid separator 302, and then enters the compressor 301 to be compressed into a high-temperature and high-pressure gas. An oil separator and a heat exchanger 304 are also provided in the rectangular shell 101. The high-temperature and high-pressure gas passes through the oil separator and enters the heat exchanger 304 to dissipate excess heat and become a two-phase refrigerant. It is then converted into a high-pressure liquid refrigerant through the heat exchange structure and enters the fluorine tank to complete the cycle of fluorine collection.

[0039] The method for using the refrigerant recovery device comprises the following steps:

[0040] Step 1: There are two groups of heat exchange copper tubes in the water tank, one group is the evaporation heat exchange tube 202, and the other group is the condensation heat exchange tube 203; the heat of the condensation heat exchange tube 203 is transferred to the evaporation heat exchange tube 202 through the medium water, so that the refrigerant in the evaporation heat exchange tube is completely evaporated into gaseous state, and at the same time, the high-pressure refrigerant in the condensation heat exchange tube 203 becomes liquid, and the liquid refrigerant enters the fluorine tank through the drying filter for storage;

[0041] Step 2: The refrigerant recovery port is connected to the air conditioner that needs to recover fluorine. Through the suction of the compressor 301, the mixture of refrigerant liquid, gas and oil is completely converted into gas through the evaporation heat exchange tube 202, enters the gas-liquid separator 302, and then enters the compressor 301 to be compressed into high-temperature and high-pressure gas;

[0042] Step 3: The high-temperature and high-pressure gas passes through the oil separator accessory and enters the heat exchanger 304 of the EC fan to dissipate excess heat and become a two-phase refrigerant, then enters the above-mentioned water tank for heat exchange and becomes a high-pressure liquid refrigerant and enters the fluorine tank; the whole process is repeated to complete the fluorine collection action.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A refrigerant recovery device, characterized in that: include: A shell structure (100) comprises a rectangular shell (101), wherein the rectangular shell (101) comprises a plurality of vertical plates, a top plate and a base, and the plurality of vertical plates are fixedly connected to the top plate and the base by I-shaped steel and bolts to form an integrated structure; The heat exchange structure (200) comprises a water tank (201) arranged in a rectangular shell (101), wherein two groups of heat exchange copper tubes are arranged in the water tank (201), one group is an evaporation heat exchange tube (202), and the other group is a condensation heat exchange tube (203), and the heat of the condensation heat exchange tube (203) is transferred to the evaporation heat exchange tube (202) through medium water, so that the refrigerant in the evaporation heat exchange tube (202) is completely evaporated into a gaseous state, and at the same time, the refrigerant in the condensation heat exchange tube (203) is changed into a liquid state, and the liquid refrigerant enters an external fluorine tank through a drying filter for storage; A fluorine recovery structure (300) comprises a recovery pipe, a compressor (301) and a gas-liquid separator (302). The compressor (301) is connected to the gas-liquid separator (302). A mixture of refrigerant liquid, gas and oil is completely converted into gas through an evaporative heat exchange pipe (202) and a recovery pipe and then enters the gas-liquid separator (302). The mixture then enters the compressor (301) and is compressed into a high-temperature and high-pressure gas. An oil separator and a heat exchanger (304) are also provided in the rectangular shell (101). The high-temperature and high-pressure gas passes through the oil separator and enters the heat exchanger (304) to dissipate excess heat and become a two-phase refrigerant. The high-pressure and high-temperature gas passes through the heat exchange structure and then becomes a high-pressure liquid refrigerant and enters the fluorine tank to complete the cycle of collecting fluorine.

2. The refrigerant recovery device according to claim 1, characterized in that: The condensing heat exchange pipe (203) in the water tank (201) is connected to a refrigerant discharge pipe, the drying filter is connected to the refrigerator discharge pipe, a needle valve is also provided on the outer wall of the refrigerant discharge pipe, and the output end of the refrigerant discharge pipe is connected to an external fluorine tank.

3. The refrigerant recovery device according to claim 2, characterized in that: The output end of the evaporation heat exchange tube (202) in the water tank (201) is connected to the recovery tube, and a low-pressure sensor for monitoring the internal pressure is arranged on the side wall of the recovery tube. The output end of the gas-liquid separator (302) is connected to a guide tube, the compressor (301) is connected to the guide tube, a high-pressure switch is arranged on the outer side wall of the guide tube, and the output end of the guide tube is connected to the oil separator.

4. The refrigerant recovery device according to claim 3, characterized in that: A sight glass is arranged on the side wall of the oil separator, and a temperature protector is connected to the outer side wall of the guide tube.

5. The refrigerant recovery device according to claim 3, characterized in that: The output end of the oil separator is connected to an air duct, a one-way valve is provided on the side wall of the air duct, and a high-pressure sensor is also connected to the outer wall of the air duct. The output end of the air duct is connected to a heat exchanger (304), and the heat exchanger (304) is equipped with an EC fan (305). The output end of the air duct is connected to a condensing heat exchange pipe (203) in a water tank (201).

6. The refrigerant recovery device according to claim 1, characterized in that: The recovery port of the recovery pipe is connected to an external air conditioner for recovering fluorine, and the gas is sucked into the gas-liquid separator (302) through the suction force of the compressor (301).

7. The refrigerant recovery device according to claim 1, characterized in that: The method for using the refrigerant recovery device comprises the following steps: Step 1: There are two groups of heat exchange copper tubes in the water tank, one group is the evaporation heat exchange tube (202), and the other group is the condensation heat exchange tube (203); the heat of the condensation heat exchange tube (203) is transferred to the evaporation heat exchange tube (202) through the medium water, so that the refrigerant in the evaporation heat exchange tube is completely evaporated into gaseous state, and at the same time, the high-pressure refrigerant in the condensation heat exchange tube (203) is turned into liquid state, and the liquid refrigerant enters the fluorine tank through the drying filter for storage; Step 2: The refrigerant recovery port is connected to the air conditioner from which fluorine is to be recovered. Through the suction force of the compressor (301), the mixture of refrigerant liquid, gas and oil is completely converted into gas through the evaporation heat exchange tube (202), enters the gas-liquid separator (302), and then enters the compressor (301) to be compressed into high-temperature and high-pressure gas; Step 3: The high-temperature and high-pressure gas passes through the oil separator attachment and enters the heat exchanger (304) of the EC fan, dissipates excess heat and becomes a two-phase refrigerant, then enters the above-mentioned water tank for heat exchange, becomes a high-pressure liquid refrigerant, and enters the fluorine tank; the whole process is repeated to complete the fluorine collection action.

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