CN219318673U

CN219318673U - Parallel refrigerating system with cooling circulation water tank shared by oil cooler and condenser

Info

Publication number: CN219318673U
Application number: CN202320532162.4U
Authority: CN
Inventors: 冯立杰; 王志军; 王延锋; 赵文涛; 杨增杰; 刘艳娥; 刘克平; 任克非
Original assignee: Zhengzhou Weixun Electromechanical Equipment Installation Engineering Co ltd
Current assignee: Zhengzhou Weixun Electromechanical Equipment Installation Engineering Co ltd
Priority date: 2023-03-19
Filing date: 2023-03-19
Publication date: 2023-07-07
Anticipated expiration: 2033-03-19

Abstract

The utility model provides a parallel refrigerating system with an oil cooler and a condenser sharing a cooling circulation water tank (10), which comprises a compressor (1), an exhaust header (2), an oil separator (3), a water-cooled condenser (4), a horizontal liquid reservoir (5), a fluorine pump liquid supply system (6), a gas-liquid separator (7), a return air header (8), a water-cooled oil cooler (9) and the cooling circulation water tank (10), wherein the outlet of the cooling circulation water tank (10) is respectively connected with the inlets of the water-cooled condenser (4) and the water-cooled oil cooler (9) through two branch pipes by adding the cooling circulation water tank (10), the outlet of the water-cooled condenser (4) and the outlet of the water-cooled oil cooler (9) are respectively connected with the inlet of the cooling circulation water tank (10) through pipes, and the oil cooler and the condenser share the same cooling circulation water tank (10). The system not only meets the cooling requirements of the condenser and the oil cooler, but also supplies sufficient cooling oil to the compressor (1).

Description

Parallel refrigerating system with cooling circulation water tank shared by oil cooler and condenser

Technical Field

The utility model relates to the technical field of parallel refrigeration, in particular to a parallel refrigeration system with an oil cooler and a condenser sharing a cooling circulation water tank.

Background

The refrigeration house is used as an artificial refrigeration device, and has important significance for constant temperature and humidity storage of semi-finished products and finished products. The refrigerating unit is used as a supply source of cold energy of the refrigeration house, and is a guarantee for long-term and stable operation of the refrigeration house, but the refrigerating system of the single unit cannot meet the cold energy requirement of the large refrigeration house due to continuous occurrence of the large refrigeration house. Therefore, the parallel refrigerating machine composed of two or more compressors and adopting the parallel mode can effectively supply the cold energy of the large-scale refrigeration house. The compressors of the parallel refrigerating units share one set of refrigerating loop, and the parallel refrigerating units can be composed of compressors of the same type or compressors of different types according to the refrigerating temperature and the refrigerating capacity and the difference of the matched condensers, but the refrigerating devices of the large-scale refrigeration houses at present mainly comprise single-cycle parallel refrigerating units of the same type of compressors.

When the same type of compressor single-cycle parallel refrigerating unit operates, a condenser and an oil cooler are required to be equipped according to environmental conditions and operating conditions, and at present, the condenser and the oil cooler respectively adopt two different cooling modes, for example, the condenser usually adopts an evaporative cooling mode, the oil cooler adopts a plate heat exchanger mode for cooling, the cooling modes of the two modes are different, and meanwhile, the complexity of the whole structure and the control system of the same type of compressor single-cycle parallel refrigerating unit is increased; in addition, when the single-cycle parallel refrigerating units of the same type of compressors are operated, the quantity of cooling lubricating oil required by each compressor is different, but at present, a uniform oil supply mode is generally adopted to supply cooled lubricating oil to each compressor of the single-cycle parallel refrigerating units of the same type of compressors, so that the compressors with larger oil demand cannot obtain enough cooling lubricating oil, and the compressors with smaller oil demand obtain more cooling lubricating oil, so that the supply of the cooling lubricating oil is unbalanced, and the service life of the whole machine of the single-cycle parallel refrigerating units of the same type of compressors is influenced.

In view of this, aiming at the problem that the cooling modes of the condenser and the oil cooler of the existing similar compressor single-cycle parallel refrigerating unit are different, the complexity of the whole machine structure and the control system is increased, and meanwhile, the sufficient cooling lubricating oil is ensured to be provided for each compressor of the parallel refrigerating unit, a parallel refrigerating system with the oil cooler and the condenser sharing a cooling circulation water tank is needed, so that the cooling requirements of the condenser and the oil cooler are met, and meanwhile, the sufficient cooling lubricating oil is supplied for each compressor.

Disclosure of Invention

Aiming at the technical defects, the utility model provides a parallel refrigerating system with the common cooling circulation water tank of the oil cooler and the condenser by adopting a mode that the oil cooler and the condenser share the same cooling circulation water tank.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a parallelly connected refrigerating system of oil cooler and condenser sharing cooling circulation water tank, which comprises a compressor, the exhaust manifold, the oil separator, the water-cooled condenser, horizontal reservoir, fluorine pump liquid supply system, the gas-liquid separator, the return air header, water-cooled oil cooler and cooling circulation water tank, wherein the blast pipe of each compressor of parallelly connected refrigerating system all is connected to the exhaust manifold, the one end export of exhaust manifold is connected with the import of oil separator, the upper portion export of oil separator is connected with the lower part import of water-cooled condenser through the pipeline, the lower part export of water-cooled condenser is connected with the import of horizontal reservoir through the pipeline, the export of horizontal reservoir is connected to fluorine pump liquid supply system and links to each other with the freezer terminal through the fluorine pump liquid supply system, the refrigerant medium that the freezer terminal backward flow gets into the air inlet of each compressor of parallelly connected refrigerating system after gas-liquid separator and return air header respectively, the lower part export of oil cooler is connected with the lower import of oil cooler through oil filter first and oil cut-off ball valve in proper order, the lower part export of oil cooler is connected with the oil inlet of each compressor of parallelly connected refrigerating system through the oil return oil pipeline structure respectively, the export of cooling circulation water cooler is connected with the import of water-cooled refrigerating system through two water-cooled condenser and water-cooled condenser respectively, the export of water-cooled cooling circulation water tank is connected with the import of cooling circulation water cooler respectively through the pipeline.

The left end of the exhaust manifold is plugged, the right end of the exhaust manifold is connected to the inlet of the oil separator through a pipeline, the exhaust pressure sensor and the exhaust pressure gauge are respectively fixed on the pipeline between the exhaust manifold and the oil separator, the exhaust pressure sensor is close to the outlet of the right end of the exhaust manifold, and the exhaust pressure gauge is close to the inlet of the oil separator.

The fluorine pump liquid supply system comprises a liquid supply branch pipe A, a liquid supply branch pipe B and a liquid supply branch pipe C, wherein the liquid supply branch pipe A, the liquid supply branch pipe B and the liquid supply branch pipe C are arranged on the fluorine pump liquid supply system in a parallel connection mode, the liquid supply branch pipe A, the liquid supply branch pipe B and the liquid supply branch pipe C all comprise a liquid supply filter, a fluorine pump and a differential pressure protector, the liquid supply filter is arranged at the forefront ends of the liquid supply branch pipe A, the liquid supply branch pipe B and the liquid supply branch pipe C, the fluorine pump is arranged at the back of the liquid supply filter, one end of the differential pressure protector is connected with an inlet pipeline of the fluorine pump, and the other end of the differential pressure protector is connected with an outlet pipeline of the fluorine pump.

And a pipeline between the gas-liquid separator and the return air header is provided with a return air pressure gauge and a return air pressure sensor, wherein the installation position of the return air pressure gauge is close to the inlet and the outlet of the return air header, and the installation position of the return air pressure sensor is close to the outlet of the gas-liquid separator.

The oil return pipeline structure comprises a stop valve A, an oil viewing mirror, an electromagnetic valve, an oil flow controller, an oil filter B, a stop valve B and a connecting pipeline, wherein the stop valve A, the oil viewing mirror, the electromagnetic valve, the oil flow controller, the oil filter B and the stop valve B are sequentially arranged according to the flowing direction of lubricating oil in the oil return pipeline structure, and the number of the oil return pipeline structures is equal to that of compressors of a parallel refrigerating system.

The electromagnetic valve and the oil flow controller are connected with a programmable logic controller PLC of the control cabinet of the parallel refrigeration system, and the programmable logic controller PLC detects the lubricating oil flow of the oil flow controller and controls the opening of the electromagnetic valve.

The pipeline between the water-cooled oil cooler and the oil return pipeline structure is provided with an oil temperature three-way valve, and the pipeline at the inlet of the lower part of the water-cooled oil cooler is connected with the oil temperature three-way valve in a bypass branch pipe mode.

The cooling circulation water tank can adopt a horizontal structure and a vertical structure, and the volume of the cooling circulation water tank is determined according to the filling quantity of refrigerant medium and the filling quantity of lubricating oil of the whole system.

Compared with the prior art, the parallel refrigeration system with the cooling circulation water tank shared by the oil cooler and the condenser adopts low-temperature or normal-temperature water in the cooling circulation water tank to cool the refrigerant medium in the water-cooled condenser and high-temperature lubricating oil in the water-cooled oil cooler respectively, so that the cooling structures of the condenser and the oil cooler are simplified, and the complexity of the whole structure and the control system is reduced; secondly, a plurality of oil return pipeline structures are adopted to respectively provide lubricating oil for each compressor of the parallel refrigerating system, and the oil supply quantity of each oil return pipeline structure is connected by a programmable logic controller PLC of a control cabinet of the parallel refrigerating system, so that the aim of automatically and sufficiently supplying oil is fulfilled; finally, the pipeline of the oil separator entering the water-cooled oil cooler is connected with the oil temperature three-way valve at the outlet of the lower part of the water-cooled oil cooler in a bypass branch pipe mode, if the temperature of lubricating oil discharged by the oil separator is in a design range, the one-way stop valve at the inlet and the outlet of the lower part of the water-cooled oil cooler is closed, the lubricating oil discharged by the oil separator directly enters an oil return pipeline structure through the oil temperature three-way valve, but if the temperature of the lubricating oil discharged by the oil separator is higher than the design range, the one-way stop valve at the inlet and the outlet of the lower part of the water-cooled oil cooler is opened, lubricating oil in the bypass branch pipe cannot enter the oil temperature three-way valve, and the lubricating oil discharged by the oil separator enters the oil return pipeline structure after entering the water-cooled cooler for cooling, so that the temperature of the lubricating oil entering the compressor of the parallel refrigerating system is in the design range is ensured.

Drawings

FIG. 1 is a schematic diagram of the overall system architecture of the present utility model;

FIG. 2 is a schematic diagram of the oil return line structure of the present utility model;

FIG. 3 is a schematic diagram of a fluorine pump liquid supply system according to the present utility model.

Marked in the figure as: 1: a compressor; 2: an exhaust manifold; 21: an exhaust pressure sensor; 22: an exhaust pressure gauge; 3: an oil separator; 31: an oil filter I; 32: an oil shut-off ball valve; 4: a water-cooled condenser; 5: a horizontal reservoir; 6: a fluorine pump liquid supply system; 61: a liquid supply branch pipe I; 62: a liquid supply branch pipe B; 63: a liquid supply branch pipe C; 64: a liquid supply filter; 65: a fluorine pump; 66: a differential pressure protector; 7: a gas-liquid separator; 71: a return air pressure gauge; 72: a back pressure sensor; 8: a return air header; 9: a water-cooled oil cooler; 91: an oil temperature three-way valve; 92: a stop valve A; 93: an oil-viewing mirror; 94: an electromagnetic valve; 95: an oil flow controller; 96: an oil filter B; 97: a stop valve B; 10: and cooling the circulating water tank.

Detailed Description

In order to make the technical problems, technical solutions and implementation effects to be solved by the present utility model clearer, an embodiment of the present utility model is further described below with reference to fig. 1, 2 and 3:

referring to fig. 1-3, arrows in the drawing show the medium flowing direction in a parallel refrigeration system, the parallel refrigeration system of the cooling circulation water tank shared by an oil cooler and a condenser comprises a compressor 1, an exhaust header 2, an oil separator 3, a water-cooled condenser 4, a horizontal liquid reservoir 5, a fluorine pump liquid supply system 6, a gas-liquid separator 7, an air return header 8, a water-cooled oil cooler 9 and a cooling circulation water tank 10, wherein an exhaust pipe of each compressor 1 of the parallel refrigeration system is connected to the exhaust header 2, one end outlet of the exhaust header 2 is connected with an inlet of the oil separator 3, an upper outlet of the oil separator 3 is connected with a lower inlet of the water-cooled condenser 4 through a pipeline, a lower outlet of the water-cooled condenser 4 is connected with an inlet of the horizontal liquid reservoir 5 through a pipeline, an outlet of the horizontal liquid reservoir 5 is connected to the fluorine pump liquid supply system 6 through a fluorine pump liquid supply system terminal, refrigerant medium flowing back from the cold storage terminal is respectively enters an air inlet of each compressor 1 of the parallel refrigeration system after passing through the gas-liquid separator 7 and the air return header 8, a lower outlet of the water-cooled oil cooler 9 is sequentially connected with an inlet of the water-cooled oil cooler 9 of the water-cooled circulation water-cooled oil cooler 9 through a ball valve 32 and an inlet of the water-cooled oil cooler, and an outlet of the water-cooled circulation water-cooled oil cooler 9 is respectively connected with an inlet of the water-cooled circulation water tank 9 of the water-cooled condenser 4 through a water-cooled condenser 4, and an inlet of the water-cooled oil cooler 9 is connected with an inlet of the water-cooled circulation device of the inlet of the water-cooled condenser 4, respectively.

Preferably, the left end of the exhaust manifold 2 is plugged, the right end of the exhaust manifold 2 is connected to the inlet of the oil separator 3 through a pipeline, the exhaust pressure sensor 21 and the exhaust pressure gauge 22 are respectively fixed on the pipeline between the exhaust manifold 2 and the oil separator 3, the exhaust pressure sensor 21 is close to the right end outlet of the exhaust manifold 2, the exhaust pressure gauge 22 is close to the inlet of the oil separator 3, the exhaust manifold 2 is fixedly arranged on a rack of the parallel refrigerating system, the exhaust pressure sensor 21 is used for detecting the pressure of the refrigerant medium discharged by the exhaust manifold 2 and transmitting the pressure to the programmable logic controller PLC of the control cabinet of the parallel refrigerating system, and the exhaust pressure gauge 22 can directly display the pressure value of the refrigerant medium discharged by the exhaust manifold 2.

Preferably, the fluorine pump liquid supply system 6 includes a liquid supply branch pipe a 61, a liquid supply branch pipe b 62 and a liquid supply branch pipe c 63, wherein the liquid supply branch pipe a 61 is a common branch pipe, the liquid supply branch pipe b 62 is a maintenance branch pipe, the liquid supply branch pipe c 63 is a standby branch pipe, the liquid supply branch pipe a 61, the liquid supply branch pipe b 62 and the liquid supply branch pipe c 63 are installed on the fluorine pump liquid supply system 6 in a parallel connection manner, the liquid supply branch pipe a 61, the liquid supply branch pipe b 62 and the liquid supply branch pipe c 63 all include a liquid supply filter 64, a fluorine pump 65 and a differential pressure protector 66, wherein the liquid supply filter 64 is installed at the forefront end of the liquid supply branch pipe a 61, the liquid supply branch pipe b 62 and the liquid supply branch pipe c 63, the fluorine pump 65 is installed at the back of the liquid supply filter 64, one end of the differential pressure protector 66 is connected with an inlet pipeline of the fluorine pump 65, the other end of the differential pressure protector 66 is connected with an outlet pipeline of the fluorine pump 65, wherein the liquid supply filter 64 of each liquid supply branch pipe is used for filtering the refrigerant entering the liquid supply system 6, the other liquid supply branch pipe a refrigerant is prevented from entering the fluorine pump, the fluorine pump 65, the other liquid supply filters the refrigerant filter 64, the refrigerant filter is used for the refrigerant, the other liquid, the refrigerant filter is used for detecting the refrigerant inlet of the fluorine pump, the refrigerant pump is used for detecting the differential pressure, the refrigerant is required to be the controller, and the controller is used for detecting the refrigerant, and the refrigerant is in the controller is in the real time, and the case has a controller is in the control has a real-time, and is in the condition has the control and has the controller is required to be controlled by the controller and is in the control and is in real time.

Preferably, a return air pressure gauge 71 and a return air pressure sensor 72 are installed on a pipeline between the gas-liquid separator 7 and the return air header 8, the installation position of the return air pressure gauge 71 is close to the inlet and outlet of the return air header 8, the installation position of the return air pressure sensor 72 is close to the outlet of the gas-liquid separator 7, the return air pressure sensor 72 is used for detecting the pressure of the refrigerant medium entering the return air header 8 and transmitting the pressure to a programmable logic controller PLC of a parallel refrigeration system control cabinet, and the return air pressure gauge 71 can directly display the pressure value of the refrigerant medium entering the return air header 8.

Preferably, the oil return pipeline structure comprises a stop valve A92, an oil viewing mirror 93, an electromagnetic valve 94, an oil flow controller 95, an oil filter B96, a stop valve B97 and a connecting pipeline, wherein the stop valve A92, the oil viewing mirror 93, the electromagnetic valve 94, the oil flow controller 95, the oil filter B96 and the stop valve B97 are sequentially arranged according to the flowing direction of lubricating oil in the oil return pipeline structure, the number of the oil return pipeline structures is equal to that of compressors 1 of a parallel refrigeration system, and the stop valve A92 and the stop valve B97 can block the lubricating oil entering the oil return pipeline structure so as to maintain the oil return pipeline structure; the sight glass 93 may observe the flow of the lubricant in the return line structure, while the oil flow controller 95 is used to detect the flow of the lubricant in the return line structure, and the solenoid valve 94 is used to control the flow of the lubricant in the return line structure.

The electromagnetic valve 94 and the oil flow controller 95 are connected with a programmable logic controller PLC of the control cabinet of the parallel refrigeration system, and the programmable logic controller PLC detects the flow of lubricating oil of the oil flow controller 95 and controls the opening degree of the electromagnetic valve 94, so that sufficient lubricating oil is ensured to enter each compressor 1 of the parallel refrigeration system.

An oil temperature three-way valve 91 is arranged on a pipeline between the water-cooled oil cooler 9 and the oil return pipeline structure, a bypass branch pipe is adopted on a pipeline at the inlet of the lower part of the water-cooled oil cooler 9 to be connected with the oil temperature three-way valve 91, and if the temperature of lubricating oil discharged by the oil separator 3 is in a design range, the one-way stop valves at the inlet and the outlet of the lower part of the water-cooled oil cooler 9 are closed, and the lubricating oil discharged by the oil separator 3 directly enters the oil return pipeline structure through the oil temperature three-way valve 91; however, if the temperature of the lubricating oil discharged from the oil separator 3 is higher than the design range, the one-way stop valves of the inlet and the outlet of the lower part of the water-cooled oil cooler 9 will be opened, and the lubricating oil discharged from the oil separator 3 enters the water-cooled cooler to be cooled and then enters the oil return pipeline structure.

The cooling circulation water tank 10 can adopt a horizontal structure and a vertical structure, the volume of the cooling circulation water tank 10 is determined together according to the filling amount of refrigerant medium and the filling amount of lubricating oil of the whole system, and further in order to improve the cooling effect of the water-cooled condenser 4 and the water-cooled oil cooler 9, the medium in the cooling circulation water tank 10 can be subjected to further cooling treatment according to the use requirement, the temperature of the medium in the cooling circulation water tank 10 is reduced, or the medium flow speed between the cooling circulation water tank 10 and the water-cooled condenser 4 and the water-cooled oil cooler 9 can be improved, so that the cooling effect of the water-cooled condenser 4 and the water-cooled oil cooler 9 is improved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The utility model provides a parallelly connected refrigerating system of oil cooler and condenser sharing cooling circulation water tank, includes compressor (1), exhaust collector (2), oil separator (3), water-cooled condenser (4), horizontal reservoir (5), fluorine pump feed liquid system (6), gas-liquid separator (7), return air collector (8), water-cooled oil cooler (9) and cooling circulation water tank (10), its characterized in that: an exhaust pipe of each compressor (1) of the parallel refrigerating system is connected to an exhaust header (2), one end outlet of the exhaust header (2) is connected with an inlet of an oil separator (3), an upper outlet of the oil separator (3) is connected with a lower inlet of a water-cooled condenser (4) through a pipeline, a lower outlet of the water-cooled condenser (4) is connected with an inlet of a horizontal liquid reservoir (5) through a pipeline, an outlet of the horizontal liquid reservoir (5) is connected to a fluorine pump liquid supply system (6) and is connected with a cold storage terminal through the fluorine pump liquid supply system (6), refrigerant medium flowing back from the cold storage terminal enters an air inlet of each compressor (1) of the parallel refrigerating system respectively after passing through a gas-liquid separator (7) and an air return header (8), a lower outlet of the oil separator (3) is connected with a lower inlet of a water-cooled oil cooler (9) through an oil filter A (31) and an oil cut-off ball valve (32) in sequence, a lower outlet of the oil cooler (9) is respectively connected with an oil inlet of each compressor (1) of the parallel refrigerating system through an oil return pipeline structure, a cooling circulation water tank (10) is respectively connected with inlets of the water-cooled oil coolers (9) through water-cooled water coolers (4), the outlet of the water-cooled condenser (4) and the outlet of the water-cooled oil cooler (9) are respectively connected with the inlet of the cooling circulation water tank (10) through pipelines.

2. The parallel refrigeration system of a cooling circulation tank shared by an oil cooler and a condenser as set forth in claim 1, wherein: the left end of the exhaust manifold (2) is plugged, the right end of the exhaust manifold (2) is connected to the inlet of the oil separator (3) through a pipeline, an exhaust pressure sensor (21) and an exhaust pressure gauge (22) are respectively fixed on the pipeline between the exhaust manifold (2) and the oil separator (3), the exhaust pressure sensor (21) is close to the right end outlet of the exhaust manifold (2), and the exhaust pressure gauge (22) is close to the inlet of the oil separator (3).

3. The parallel refrigeration system of a cooling circulation tank shared by an oil cooler and a condenser as set forth in claim 1, wherein: the fluorine pump liquid supply system (6) comprises a liquid supply branch pipe A (61), a liquid supply branch pipe B (62) and a liquid supply branch pipe C (63), wherein the liquid supply branch pipe A (61) is used as a common branch pipe, the liquid supply branch pipe B (62) is used as a maintenance branch pipe, the liquid supply branch pipe C (63) is used as a standby branch pipe, the liquid supply branch pipe A (61), the liquid supply branch pipe B (62) and the liquid supply branch pipe C (63) are installed on the fluorine pump liquid supply system (6) in a parallel mode, the liquid supply branch pipe A (61), the liquid supply branch pipe B (62) and the liquid supply branch pipe C (63) all comprise a liquid supply filter (64), a fluorine pump (65) and a pressure difference protector (66), the liquid supply filter (64) is installed at the forefront end of the liquid supply branch pipe A (61), the liquid supply branch pipe B (62) and the liquid supply branch pipe C (63), one end of the pressure difference protector (66) is connected with an inlet pipeline of the fluorine pump (65), and the other end of the pressure difference protector (66) is connected with an outlet pipeline of the fluorine pump (65).

4. The parallel refrigeration system of a cooling circulation tank shared by an oil cooler and a condenser as set forth in claim 1, wherein: an air return pressure gauge (71) and an air return pressure sensor (72) are arranged on a pipeline between the air-liquid separator (7) and the air return header (8), the installation position of the air return pressure gauge (71) is close to the inlet and outlet of the air return header (8), and the installation position of the air return pressure sensor (72) is close to the outlet of the air-liquid separator (7).

5. The parallel refrigeration system of a cooling circulation tank shared by an oil cooler and a condenser as set forth in claim 1, wherein: the oil return pipeline structure comprises a stop valve A (92), an oil looking mirror (93), an electromagnetic valve (94), an oil flow controller (95), an oil filter B (96), a stop valve B (97) and a connecting pipeline, wherein the stop valve A (92), the oil looking mirror (93), the electromagnetic valve (94), the oil flow controller (95), the oil filter B (96) and the stop valve B (97) are sequentially arranged according to the flowing direction of lubricating oil in the oil return pipeline structure, and the number of the oil return pipeline structures is equal to that of compressors (1) of a parallel refrigerating system.

6. The parallel refrigeration system of a cooling circulation tank shared by an oil cooler and a condenser as set forth in claim 1, wherein: the electromagnetic valve (94) and the oil flow controller (95) are connected with a programmable logic controller PLC of a control cabinet of the parallel refrigeration system, and the programmable logic controller PLC detects the lubricating oil flow of the oil flow controller (95) and controls the opening of the electromagnetic valve (94).

7. The parallel refrigeration system of a cooling circulation tank shared by an oil cooler and a condenser as set forth in claim 1, wherein: an oil temperature three-way valve (91) is arranged on a pipeline between the water-cooled oil cooler (9) and the oil return pipeline structure, and the pipeline at the inlet of the lower part of the water-cooled oil cooler (9) is connected with the oil temperature three-way valve (91) by adopting a bypass branch pipe mode.

8. The parallel refrigeration system of a cooling circulation tank shared by an oil cooler and a condenser as set forth in claim 1, wherein: the cooling circulation water tank (10) can adopt a horizontal structure and a vertical structure, and the volume size of the cooling circulation water tank is determined according to the filling amount of refrigerant medium and the filling amount of lubricating oil of the whole system.