Refrigerant distribution device with oil separation function and air conditioning unit

Abstract

The utility model provides a refrigerant distribution device and air conditioning unit with oil separation function, including a high-efficiency oil separator cylinder; an oil separator air inlet pipe; an oil separator air outlet pipe and a three-way ball valve assembly; one end of the oil separator air inlet pipe is arranged on one side of the high-efficiency oil separator cylinder, and the other end of the oil separator air inlet pipe is connected to the compressor exhaust pipe; the oil separator air outlet pipe is arranged above the high-efficiency oil separator cylinder, and the oil separator air outlet pipe is connected to the three-way ball valve assembly through a connecting pipe; an oil separator oil return pipe is arranged at the bottom of the high-efficiency oil separator cylinder, and the oil separator oil return pipe is connected to the oil return capillary assembly; the oil separator oil return pipe is arranged on the side wall of the high-efficiency oil separator cylinder through the oil return capillary assembly fixing assembly. The present application is a refrigerant distribution assembly dedicated to a variable frequency air conditioning unit with a condensing heat recovery function, which combines a high-efficiency oil separator, an oil return pipeline, and an electric three-way ball valve into one assembly, which is convenient for production operations.

Description

Technical Field

[0001] The utility model belongs to the technical field of commercial central air-conditioning equipment, in particular to a refrigerant distribution device with oil separation function and an air-conditioning unit. Background Art

[0002] Among the energy consumption of buildings, more than half of the energy consumption is for central air conditioning, especially in the cooling season, central air conditioning bears the main function of cooling and dehumidifying to ensure the comfort or process requirements of the room. Usually in medical purification places, it is necessary to ensure constant temperature and humidity in the room. The air conditioning process to achieve constant temperature and humidity in the room is: after the air sent to the room absorbs the residual heat and humidity in the room, part of it is discharged to the outside, and the other part returns to the air handling unit to mix with the fresh air, and is cooled and dehumidified to the machine dew point through the indoor heat exchanger, and then heated to the air supply state point through the reheating section. The forms of reheating include hot water heating, steam heating, electric heating, etc. The above adjustment process is a return air plus reheating adjustment, and the phenomenon of cold and hot offsetting each other causes a huge waste of energy, which does not meet the requirements of energy conservation and emission reduction.

[0003] At present, in constant temperature and humidity air conditioning systems, the energy-saving solution of replacing electric heating with condensing heat has been widely adopted. The specific method is: the indoor unit adds a heat recovery coil after the evaporation coil; the outdoor unit compressor exhaust pipeline adds a gaseous refrigerant distributor to distribute the high-temperature and high-pressure gaseous refrigerant to the condensing coil and the heat recovery coil. The existing conventional pipeline design is that the high-temperature and high-pressure gas at the compressor exhaust port is divided into two paths: one path enters the condensing coil through the control of the main electric ball valve, and the other path enters the heat recovery coil through the control of the auxiliary electric ball valve. The refrigerant distribution is achieved by adjusting the main and auxiliary electric ball valves at the same time. In terms of control, first, it is more complicated to adjust the main electric ball valve and the auxiliary electric ball valve at the same time; second, it cannot achieve stepless adjustment, the refrigerant flow distribution is not accurate, and the temperature and humidity accuracy of the air conditioning system cannot be guaranteed. Utility Model Content

[0004] In view of this, the utility model aims to provide a refrigerant distribution device and an air-conditioning unit with an oil separation function, which have a simple structure, convenient control, flexible application and certain versatility.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A refrigerant distribution device with oil separation function, comprising a high-efficiency oil separator cylinder; an oil separator air inlet pipe; an oil separator air outlet pipe, and a three-way ball valve assembly;

[0007] One end of the oil separator air inlet pipe is arranged on one side of the high-efficiency oil separator cylinder, and the other end of the oil separator air inlet pipe is connected to the compressor exhaust pipe; the oil separator air outlet pipe is arranged above the high-efficiency oil separator cylinder, and the oil separator air outlet pipe is connected to the three-way ball valve assembly through a connecting pipe;

[0008] An oil separator return pipe is provided at the bottom of the high-efficiency oil separator cylinder, and the oil separator return pipe is connected to the oil return capillary assembly; the oil separator return pipe is arranged on the side wall of the high-efficiency oil separator cylinder through the oil return capillary assembly fixing assembly.

[0009] Furthermore, the three-way ball valve assembly includes a three-way ball valve, the bottom of the three-way ball valve is a refrigerant inlet, and the refrigerant inlet is connected to the oil separator through a connecting pipe.

[0010] One side of the three-way ball valve is provided with a first refrigerant outlet distributed to the condenser side, and the other side of the three-way ball valve is provided with a second refrigerant outlet distributed to the heat recovery heat exchanger side.

[0011] Preferably, the three-way ball valve is an electric three-way ball valve, which is driven by a stepper motor.

[0012] Further, the fixing assembly includes an oil return capillary assembly fixing plate and a cable tie;

[0013] The oil return capillary assembly fixing plate is arranged on one side of the high-efficiency oil separator cylinder, and a groove for the cable tie to pass through is arranged on the oil return capillary assembly fixing plate. The cable tie passes through the oil return capillary assembly fixing plate and is arranged around it.

[0014] Preferably, the rolled strap is a weather-resistant nylon cable tie.

[0015] Further, the oil return capillary assembly includes a winding oil return capillary, a screen filter, and an oil separation connecting pipe;

[0016] The screen filter and the oil separator connecting pipe are arranged on both sides of the winding oil return capillary tube;

[0017] The other end of the screen filter is connected to the oil return pipe of the oil separator.

[0018] Furthermore, an oil separator bracket is provided at the bottom of the high-efficiency oil separator cylinder, the oil separator bracket is L-shaped, the vertical end of the oil separator bracket is connected to the side wall of the high-efficiency oil separator cylinder, the horizontal end of the oil separator bracket is provided with a mounting hole, and the high-efficiency oil separator cylinder is set on the surface to be installed through the oil separator bracket.

[0019] An air conditioning unit using the above distribution device comprises the above distribution device, a compressor, a condensing assembly, an evaporating coil and a heat recovery coil;

[0020] The first refrigerant outlet of the electric three-way ball valve in the distribution device is connected to the condenser through the cooling pipe, the liquid outlet of the condenser is connected to the first liquid pipe, the first liquid pipe is connected to the heat recovery coil through the second liquid pipe, and the first liquid pipe is connected to the evaporation coil through the third liquid pipe;

[0021] The evaporator coil is connected to the compressor through an air pipe, and the compressor is connected to the oil separator air inlet pipe of the distribution device through a pipeline;

[0022] The second refrigerant outlet of the electric three-way ball valve in the distribution device is connected to the heat recovery coil through the reheat pipe.

[0023] Furthermore, the oil connection pipe is connected to the air pipe.

[0024] Furthermore, a condensing fan is provided on one side of the condenser.

[0025] Furthermore, a one-way valve is provided on the second liquid pipe.

[0026] Furthermore, an electronic expansion valve is provided on the third liquid pipe.

[0027] Compared with the prior art, the refrigerant distribution device and air conditioning unit system with oil separation function described in the utility model have the following advantages:

[0028] 1. The utility model discloses a refrigerant distribution assembly dedicated to a variable frequency air conditioning unit with an oil separation function, which combines a high-efficiency oil separator, an oil return pipeline, and an electric three-way ball valve into one assembly, which is convenient for production operations.

[0029] 2. The utility model discloses a refrigerant distribution assembly dedicated to a variable frequency air conditioning unit with an oil separation function, which can utilize a portion of the condensation heat as reheating, thereby reducing the consumption of resources such as steam, hot water, or electricity.

[0030] 3. The utility model discloses a refrigerant distribution assembly dedicated to a variable frequency air conditioning unit with an oil separation function. The electric three-way ball valve can realize the switching of the refrigerant flow direction and the stepless distribution and adjustment of the refrigerant flow rate, with simple control and high precision.

[0031] 4. The utility model discloses a refrigerant distribution assembly specially used for a variable frequency air conditioning unit with an oil separation function. With the help of the oil filtering function of the oil separator and the oil return pipeline, the lubricating oil can flow back to the compressor, thereby ensuring stable and reliable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0033] Figure 1 This is a schematic diagram of the overall structure of a refrigerant distribution assembly dedicated to a variable frequency air conditioning unit with an oil separation function in an embodiment of the utility model;

[0034] Figure 2 The present invention is a schematic structural diagram of an oil separator in a refrigerant distribution assembly dedicated to a variable frequency air conditioning unit with an oil separation function in an embodiment of the present invention.

[0035] Figure 3 It is a structural schematic diagram of an electric three-way ball valve in a refrigerant distribution assembly dedicated to a variable frequency air-conditioning unit with an oil separation function in an embodiment of the utility model.

[0036] Figure 4 The present invention is a flow chart of refrigerant circulation of a variable frequency air conditioning unit with oil separation function in an embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 1. High-efficiency oil separator cylinder; 2. Oil separator air inlet pipe; 3. Oil separator air outlet pipe; 4. Oil separator bracket; 5. Oil separator oil return pipe; 6. Return oil capillary fixing plate; 7. Cable tie; 8. Return oil capillary assembly; 8-1. Wrapped return oil capillary; 8-2. Filter screen filter; 8-3. Oil separator connecting pipe; 9. Connecting pipe; 10. Three-way ball valve assembly; 10-1. Refrigerant inlet; 10-2. First refrigerant outlet; 10-3. Second refrigerant outlet; 11. Compressor; 12. Condenser; 13. Cooling pipe; 14. First liquid pipe; 15. Second liquid pipe; 16. Third liquid pipe; 17. Evaporator coil; 18. Heat recovery coil; 19. Air pipe; 20. Reheat pipe; 21. Condensing fan; 22. One-way valve; 23. Electronic expansion valve. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0041] like Figures 1 to 4As shown, a refrigerant distribution device with oil separation function includes a high-efficiency oil separator cylinder 1; an oil separator air inlet pipe 2; an oil separator air outlet pipe 3 and a three-way ball valve assembly 10; one end of the oil separator air inlet pipe 2 is arranged on one side of the high-efficiency oil separator cylinder 1, and the other end of the oil separator air inlet pipe 2 is connected to the compressor exhaust pipe; the oil separator air outlet pipe 3 is arranged above the high-efficiency oil separator cylinder 1, and the oil separator air outlet pipe 3 is connected to the three-way ball valve assembly 10 through a connecting pipe 9; an oil separator oil return pipe 5 is provided at the bottom of the high-efficiency oil separator cylinder 1, and the oil separator oil return pipe 5 is connected to the oil return capillary assembly 8; the oil separator oil return pipe 5 is arranged on the side wall of the high-efficiency oil separator cylinder 1 through an oil return capillary assembly fixing assembly.

[0042] The three-way ball valve assembly 10 includes a three-way ball valve, the bottom of which is a refrigerant inlet 10-1, which is connected to the connecting pipe 9, one side of the three-way ball valve is provided with a first refrigerant outlet 10-2 allocated to the condenser side, and the other side of the three-way ball valve is provided with a second refrigerant outlet 10-3 allocated to the heat recovery heat exchanger side. Preferably, the three-way ball valve is an electric three-way ball valve, which is driven by a stepper motor.

[0043] The fixing assembly includes an oil return capillary assembly fixing plate 6 and a cable tie 7; the oil return capillary assembly fixing plate 6 is arranged on one side of the high-efficiency oil separator cylinder 1, and a groove for the cable tie 7 to pass through is provided on the oil return capillary assembly fixing plate 6; the cable tie 7 passes through the oil return capillary assembly fixing plate 6 and is arranged in a surrounding manner, and the rolled belt 7 is a weather-resistant nylon cable tie.

[0044] The oil return capillary assembly 8 includes a wound oil return capillary 8-1, a screen filter 8-2, and an oil separator connecting pipe 8-3; the screen filter 8-2 and the oil separator connecting pipe 8-3 are arranged on both sides of the wound oil return capillary 8-1; the other end of the screen filter 8-2 is connected to the oil separator oil return pipe 5.

[0045] A stainless steel filter is installed inside the filter 8-2, which can effectively prevent copper chips and detached oxide layers from entering the capillary tube and causing blockage, thereby ensuring that the lubricating oil can flow back to the compressor 11 smoothly and ensuring the reliable operation of the compressor 11.

[0046] An oil separator bracket 4 is provided at the bottom of the high-efficiency oil separator cylinder 1. The oil separator bracket 4 is L-shaped. The vertical end of the oil separator bracket 4 is connected to the side wall of the high-efficiency oil separator cylinder. The horizontal end of the oil separator bracket 4 is provided with a mounting hole. The high-efficiency oil separator cylinder 1 is set on the surface to be installed through the oil separator bracket 4.

[0047] An air conditioning unit using the above-mentioned distribution device comprises the above-mentioned distribution device, a compressor 11, a condensing assembly, an evaporating coil 17 and a heat recovery coil 18; the first refrigerant outlet 10-2 of the electric three-way ball valve in the distribution device is connected to the condenser 12 through a cooling pipe 13, the liquid outlet of the condenser 12 is connected to the first liquid pipe 14, the first liquid pipe 14 is connected to the heat recovery coil 18 through a second liquid pipe 15, and the first liquid pipe 14 is connected to the evaporating coil 17 through a third liquid pipe 16; the evaporating coil 17 is connected to the compressor 11 through an air pipe 19, and the compressor 11 is connected to the oil separator air inlet pipe 2 of the distribution device through a pipeline; the second refrigerant outlet 10-3 of the electric three-way ball valve in the distribution device is connected to the heat recovery coil 18 through a reheat pipe 20. The oil separator connecting pipe 8-3 is connected to the air pipe 19. A condensing fan 21 is provided on one side of the condenser 12. A one-way valve 22 is provided on the second liquid pipe 15. An electronic expansion valve 23 is provided on the third liquid pipe 16.

[0048] The oil separator inlet pipe 2 is connected to the compressor exhaust pipe. The high-temperature and high-pressure refrigerant vapor enters the electric three-way ball valve after filtering the oil through the oil separator. It is divided into two paths through proportional regulation. One path flows to the outdoor heat exchanger of the outdoor unit for heat dissipation, and the other path flows to the heat recovery heat exchanger of the indoor unit as a reheating heat source to increase the air temperature after the evaporator to maintain the indoor constant temperature requirement. The oil separator inlet pipe 2 is connected to the compressor exhaust pipe. Usually, the diameter of the oil separator inlet pipe 2 is larger than that of the compressor exhaust pipe. After the oil droplets in the exhaust gas enter the oil separator, the channel cross-section is expanded and the air flow velocity is reduced. When the lift generated by the upward movement of the air flow is less than the gravity of the lubricating oil droplets, the lubricating oil droplets can fall and be separated from the refrigerant air flow. After filtering, they are deposited at the bottom of the oil separator and then returned to the compressor 11 through the return oil pipe, ensuring the stable and reliable operation of the system.

[0049] The electric three-way ball valve drives the valve stem to rotate the three-way valve core ball through a stepper motor, which can realize the switching of the refrigerant flow to the condenser or to the heat recovery heat exchanger, and the precise distribution of the refrigerant flow to the condenser and the heat recovery heat exchanger at the same time, thereby realizing the precise control of the reheat amount.

[0050] After the high-temperature and high-pressure gaseous refrigerant and lubricating oil mixture in the compressor exhaust pipe flows through the oil separator, the separated lubricating oil is filtered and flows back to the compressor 11 through the capillary tube. After the gaseous refrigerant enters the electric three-way ball valve, it is divided into two paths, one flowing to the outdoor condensing coil 12, and the other flowing to the heat recovery coil 18 of the indoor unit. After heat dissipation, the two refrigerants merge and flow into the evaporating coil 17 of the indoor unit to absorb heat, completing the refrigerant cycle. By adjusting the opening of the electric three-way ball valve, the refrigerant flow entering the heat recovery coil 18 can be adjusted, and then the condensation reheat can be adjusted, and stepless regulation can be achieved in control, with high control accuracy.

[0051] The embodiment described a refrigerant distribution component dedicated to a variable frequency air-conditioning unit with an oil separation function. Through the oil filtering function of the oil separator and the stepless adjustment distribution function of the electric three-way ball valve, a portion of the condensation heat can be converted into reheating for cooling and dehumidification before heating under the premise of ensuring the stability of the system return oil. It can be precisely adjusted while maintaining the constant temperature requirement. It is easy to operate and convenient for production operations, so that the constant temperature and humidity air treatment process no longer needs to be equipped with reheating resources such as steam, hot water, and electricity. It also solves the problem of a large amount of cold and heat offset energy consumption, and greatly reduces the overall energy consumption of the constant temperature and humidity air-conditioning system.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A refrigerant distribution device with oil separation function, characterized in that: It comprises a high-efficiency oil separator cylinder (1); an oil separator air inlet pipe (2); an oil separator air outlet pipe (3), and a three-way ball valve assembly (10); One end of the oil separator air inlet pipe (2) is arranged on one side of the high-efficiency oil separator cylinder (1), and the other end of the oil separator air inlet pipe (2) is connected to the compressor exhaust pipe; the oil separator air outlet pipe (3) is arranged above the high-efficiency oil separator cylinder (1), and the oil separator air outlet pipe (3) is connected to the three-way ball valve assembly (10) through a connecting pipe (9); An oil separator oil return pipe (5) is provided at the bottom of the high-efficiency oil separator cylinder (1), and the oil separator oil return pipe (5) is connected to an oil return capillary tube assembly (8); the oil separator oil return pipe (5) and the oil return capillary tube assembly (8) are arranged on the side wall of the high-efficiency oil separator cylinder (1) via a fixing assembly.

2. A refrigerant distribution device with oil separation function according to claim 1, characterized in that: The three-way ball valve assembly (10) comprises a three-way ball valve, the bottom of the three-way ball valve is a refrigerant inlet (10-1), and the refrigerant inlet (10-1) is connected to the connecting pipe (9); One side of the three-way ball valve is provided with a first refrigerant outlet (10-2) distributed to the condenser side, and the other side of the three-way ball valve is provided with a second refrigerant outlet (10-3) distributed to the heat recovery heat exchanger side.

3. A refrigerant distribution device with oil separation function according to claim 1, characterized in that: The fixing assembly comprises an oil return capillary assembly fixing plate (6) and a cable tie (7); The oil return capillary tube assembly fixing plate (6) is arranged on one side of the high-efficiency oil separator cylinder (1), and a groove for allowing a tie (7) to pass through is provided on the oil return capillary tube assembly fixing plate (6), and the tie (7) passes through the oil return capillary tube assembly fixing plate (6) and is arranged around it.

4. A refrigerant distribution device with oil separation function according to claim 1, characterized in that: The oil return capillary assembly (8) comprises a wound oil return capillary (8-1), a screen filter (8-2), and an oil separation connecting pipe (8-3); The screen filter (8-2) and the oil separation connecting pipe (8-3) are arranged on both sides of the winding oil return capillary tube (8-1); The other end of the screen filter (8-2) is connected to the oil return pipe (5) of the oil separator.

5. The refrigerant distribution device with oil separation function according to claim 1, characterized in that: An oil separator bracket (4) is provided at the bottom of the high-efficiency oil separator cylinder (1); the oil separator bracket (4) is L-shaped; the vertical end of the oil separator bracket (4) is connected to the side wall of the high-efficiency oil separator cylinder (1); a mounting hole is provided at the horizontal end of the oil separator bracket (4); and the high-efficiency oil separator cylinder (1) is arranged on a surface to be mounted through the oil separator bracket (4).

6. An air conditioning unit using a refrigerant distribution device with oil separation function according to any one of claims 1 to 5, characterized in that: It comprises the above-mentioned distribution device, a compressor (11), a condensing assembly, an evaporating coil (17) and a heat recovery coil (18); The first refrigerant outlet (10-2) of the electric three-way ball valve in the distribution device is connected to the condenser (12) through a cooling pipe (13), the liquid outlet of the condenser (12) is connected to the first liquid pipe (14), the first liquid pipe (14) is connected to the heat recovery coil (18) through a second liquid pipe (15), and the first liquid pipe (14) is connected to the evaporation coil (17) through a third liquid pipe (16); The evaporating coil (17) is connected to the compressor (11) via an air pipe (19), and the compressor (11) is connected to the oil separator air inlet pipe (2) of the distribution device via a pipeline; The second refrigerant outlet (10-3) of the electric three-way ball valve in the distribution device is connected to the heat recovery coil (18) through a reheat pipe (20).

7. The air conditioning unit according to claim 6, characterized in that: The oil connecting pipe (8-3) is connected to the air pipe (19).

8. The air conditioning unit according to claim 6, characterized in that: A condensing fan (21) is provided on one side of the condenser (12).

9. The air conditioning unit according to claim 6, characterized in that: A one-way valve (22) is provided on the second liquid pipe (15).

10. The air conditioning unit according to claim 6, characterized in that: An electronic expansion valve (23) is provided on the third liquid pipe (16).

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