CN213040784U - High-pressure low-temperature trans-critical CO2Parallel refrigerating unit - Google Patents
High-pressure low-temperature trans-critical CO2Parallel refrigerating unit Download PDFInfo
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- CN213040784U CN213040784U CN202021393487.1U CN202021393487U CN213040784U CN 213040784 U CN213040784 U CN 213040784U CN 202021393487 U CN202021393487 U CN 202021393487U CN 213040784 U CN213040784 U CN 213040784U
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Abstract
The utility model provides a high pressure low temperature type trans-critical CO2Parallel refrigeration unit, its characterized in that includes: the device comprises a box body structure, a compression part, a liquid storage part and a de-superheater, wherein the box body structure comprises an electric control cabinet, a unit frame and a joint module, the electric control cabinet is arranged at the front end of the unit frame, and the joint module is arranged at the front end of the unit frameThe compression part, the liquid storage part and the desuperheater are arranged in the unit frame; the joint module includes that air cooler admits air interface, air cooler return air interface, evaporimeter supply liquid interface and evaporimeter return air interface, the utility model discloses mainly utilize the compressor group that 5 compressors are constituteed to CO2High pressure treatment is carried out, thereby realizing CO treatment in low temperature environment2And (5) refrigerating.
Description
Technical Field
The utility model relates to a CO2The technical field of refrigerators, in particular to a high-pressure low-temperature transcritical CO2And the refrigeration units are connected in parallel.
Background
CO2It is a natural refrigerant, it is non-toxic, non-flammable, ozone-consuming potential is zero, global warming potential is 1, and at the same time it also has excellent thermal physical property. At present, transcritical CO is used2The refrigerating system is widely applied in the field of European refrigeration, and is less applied in China. Current low temperature type transcritical CO2The parallel refrigerating unit, the liquid supply pipeline and the gas return pipeline connected with the end user evaporator generally adopt a medium pressure design (the design pressure is 3.0 MPa-4.5 MPa). By medium pressure design, it is required to be CO2The liquid storage device of the parallel refrigerating unit is provided with a maintaining unit. When CO is present2When the parallel refrigerating unit is powered off accidentally, the unit is maintained to work, and the pressure in the liquid storage device is maintained within a certain range. An independent power supply (power storage or generation equipment) is required to be configured for maintaining the unit, so that CO is guaranteed2When the parallel refrigerating unit is powered off accidentally, the unit can be maintained to be powered on to operate. Increased independenceThe power supply can increase the occupied area of the user equipment, and the unit is complex to control, so that the maintenance of the unit is not facilitated. And if the independent power supply fails, normal power supply can not be realized, which will affect CO2And (5) running the parallel refrigerating units. Based on objective actual requirements and solves the problems existing in the prior art.
Therefore, it is necessary to design a high-pressure low-temperature transcritical CO2And the refrigeration units are connected in parallel.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned technical problems, a high-pressure low-temperature trans-critical CO is provided2And the refrigeration units are connected in parallel. The utility model discloses mainly utilize the compressor group that 5 compressors are constituteed to CO2High pressure treatment is carried out, thereby realizing CO treatment in low temperature environment2And (5) refrigerating. The utility model discloses a technical means as follows:
high-pressure low-temperature trans-critical CO2Parallel refrigeration unit, its characterized in that includes: the device comprises a box body structure, a compression part, a liquid storage part and a superheater removal device, wherein the box body structure comprises an electric control cabinet, a unit frame and a connector module, the electric control cabinet is arranged at the front end of the unit frame, the connector module is arranged on the unit frame, and the compression part, the liquid storage part and the superheater removal device are arranged in the unit frame; the joint module comprises an air inlet interface of the air cooler, an air return interface of the air cooler, a liquid supply interface of the evaporator and an air return interface of the evaporator; the compression part comprises three low-pressure-end compressors and two high-pressure-end compressors; the liquid storage part is a high-pressure-resistant liquid storage device; a low-pressure end compressor output port of the low-pressure end compressor is connected with a superheater-removing air inlet of the superheater, a superheater-removing air return interface of the superheater and a gas output port of the liquid accumulator are connected with a high-pressure end compressor input port of the high-pressure end compressor through a Y-shaped pipeline, a high-pressure end compressor output port of the high-pressure end compressor is connected with an air inlet interface of the air-cooled machine through a pipeline II, an air return interface of the air-cooled machine is connected with a high-pressure input port of the liquid accumulator through a pipeline III, and a liquid output port at the lower end of the liquid accumulator is connected with a liquid supply interface of the evaporator through a pipeline IV,and the air return interface of the evaporator is connected with the input port of the low-pressure end compressor through a pipeline V.
Furthermore, the refrigerating unit is also provided with a regenerative plate heat exchanger, a gas-liquid separator inlet filter, a gas-liquid separator, a high-pressure filter, a liquid supply drying filter and a unit gas return filter, wherein the regenerative plate heat exchanger is arranged between the pipeline IV and the pipeline V; the branch pipe of the Y-shaped pipeline connected with the input port of the high-pressure end compressor is provided with the gas-liquid separator inlet filter and the gas-liquid separator, and the gas-liquid separator is connected between the gas-liquid separator inlet filter and the input port of the high-pressure end compressor; the high-pressure filter is arranged on the pipeline III; a liquid supply drying filter is arranged between a liquid output port at the lower end of the liquid reservoir and the heat recovery plate type heat exchanger; and the unit air return filter is arranged on the pipeline V between the heat return plate type heat exchanger and the air return interface of the evaporator.
Further, the refrigerating unit body still is equipped with oil return system, oil return system includes oil separator and oil storage tank, the oil separator sets up on the pipeline II, the oil-out of oil separator with the oil storage tank oil inlet of oil storage tank links to each other, the oil storage tank oil-out of oil storage tank with the compressor unit with the oiling mouth of reservoir links to each other, the oil storage tank with be equipped with the oil circuit filter between the oil separator, the oil circuit filter with be equipped with oil return control solenoid valve between the oil storage tank.
Furthermore, three low-pressure end compressors are respectively provided with a low-pressure end compressor frequency converter, and two high-pressure end compressors are respectively provided with a high-pressure end compressor frequency converter.
Furthermore, a liquid accumulator back pressure valve is arranged at a gas outlet of the liquid accumulator, a gas cooler back pressure valve is arranged at one end of the high-pressure filter, which is connected with the liquid accumulator, a liquid accumulator safety valve is arranged on the liquid accumulator, a safety valve is arranged on the oil storage tank, and a plurality of groups of stop valves, ball valves, pressure switches, safety valves and pressure gauges are further arranged on a pipeline of the refrigerating unit body.
Further, the unit frame is divided into an upper layer and a lower layer, three low-pressure-end compressors and two high-pressure-end compressors are installed on the lower layer of the unit frame, the joint module is installed at the rear end of the upper layer of the unit frame, and the gas-liquid separator inlet filter, the high-pressure filter, the liquid supply drying filter, the unit return air filter, the low-pressure-end compressor frequency converter, the high-pressure-end compressor frequency converter and the superheater are installed on the upper layer of the unit frame.
The utility model has the advantages of it is following:
1. the utility model provides a pair of high pressure low temperature type trans-critical CO2The parallel refrigerating unit adopts three parallel compressors connected in series with two parallel compressors and adopts frequency conversion control, so that the unit can provide larger cooling capacity, realize energy regulation, ensure stable work of a CO2 system, save energy and protect environment.
2. The utility model provides a pair of high pressure low temperature type trans-critical CO2The filter, the frequency converter, the maintaining unit and other parts of the parallel refrigerating unit which are frequently maintained are arranged outside the unit, so that the maintenance is convenient.
3. The utility model provides a pair of high pressure low temperature type trans-critical CO2The external pipelines of the parallel refrigerating units are centralized, and the maintenance is convenient.
Based on the reason, the utility model can be used in CO2The refrigerator technology and other fields are widely popularized,
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 shows the utility model of a high-pressure low-temperature transcritical CO2Schematic diagram i of a parallel refrigeration unit.
FIG. 2 shows the utility model of a high-pressure low-temperature transcritical CO2Schematic diagram ii of the parallel refrigeration unit.
FIG. 3 shows the high-pressure low-temperature transcritical CO of the present invention2And (3) a circulation system diagram of the parallel refrigerating units.
In the figure: 1. an electric control cabinet; 2. a unit frame; 3. a pressure gauge; 4. a low-pressure end compressor frequency converter, a low-pressure end compressor frequency converter 5 and a high-pressure end compressor frequency converter; 6. a gas cooler back pressure valve; 7. a high pressure filter; 8. an oil storage tank; 9. an oil path filter; 10. an oil return control solenoid valve; 11. a pressure switch; 12. a high-pressure end compressor I; 13. a high-pressure end compressor II; 14. a low-pressure end compressor I; 15. a low-pressure end compressor II; 16. a low-pressure end compressor III; 17. an air return interface of the evaporator; 18. a liquid supply interface of the evaporator; 19. an air return interface of the air cooler; 20. an air inlet interface of the air cooler; 21. removing a superheater; 22. a reservoir back pressure valve; 23. a reservoir safety valve; 24. a reservoir; 25. a gas-liquid separator; 26. an oil separator; 27. a liquid supply drying filter; 28. a unit return air filter; 29. a regenerative plate heat exchanger; 30. a pipeline I; 31. a Y-shaped pipeline; 32. a pipeline II; 33. a pipeline III; 34. a pipeline IV; 35. and a pipeline V.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
High-pressure low-temperature trans-critical CO2Parallel refrigeration unit, its characterized in that includes: the device comprises a box body structure, a compression part, a liquid storage part and a de-superheater 21, wherein the box body structure comprises an electric control cabinet 1, a unit frame 2 and a joint module, the electric control cabinet 1 is arranged at the front end of the unit frame 2, and the joint module is arranged at the front end of the unit frameThe compression part, the liquid storage part and the desuperheater 21 are arranged in the unit frame 2; the joint module comprises an air-cooling machine air inlet interface 20, an air-cooling machine air return interface 19, an evaporator liquid supply interface 18 and an evaporator air return interface 17; the compression part comprises three low-pressure-end compressors and two high-pressure-end compressors, the three low-pressure-end compressors are respectively provided with a low-pressure-end compressor frequency converter 4, and the two high-pressure-end compressors are respectively provided with a high-pressure-end compressor frequency converter 5; the liquid storage part is a high-pressure-resistant liquid storage device 24; a low-pressure end compressor output port of the low-pressure end compressor is connected with a superheater 21 removing air inlet of the superheater 21 through a pipeline I30, a superheater 21 return air port of the superheater 21 and a liquid accumulator 24 gas output port are connected with a high-pressure end compressor input port of the high-pressure end compressor through a Y-shaped pipeline 31, a liquid accumulator back pressure valve 22 is arranged at the liquid accumulator 24 gas output port, a liquid accumulator safety valve 23 is arranged on the liquid accumulator 24, a high-pressure end compressor output port of the high-pressure end compressor is connected with the air cooling machine air inlet port 20 through a pipeline II 32, the air cooling machine return air port 19 is connected with a high-pressure input port of the liquid accumulator 24 through a pipeline III 33, a liquid output port at the lower end of the liquid accumulator 24 is connected with the evaporator liquid supply port 18 through a pipeline IV 34, and the evaporator return air port 17 is connected with a low-pressure end compressor input port of the low-pressure end compressor through a, the refrigerating unit is also provided with a regenerative plate heat exchanger 29, an inlet filter of the gas-liquid separator 25, the high-pressure filter 7, a liquid supply drying filter 27 and a unit gas return filter 28, and the regenerative plate heat exchanger 29 is arranged between the pipeline IV and the pipeline V; an inlet filter of the gas-liquid separator 25 and the gas-liquid separator 25 are arranged on a branch pipe of the Y-shaped pipeline, which is connected with the input port of the high-pressure end compressor, and the gas-liquid separator 25 is connected between the inlet filter of the gas-liquid separator 25 and the input port of the high-pressure end compressor; the high-pressure filter 7 is arranged on the pipeline III, and an air cooler back pressure valve 6 is arranged at one end, connected with the liquid reservoir 24, of the high-pressure filter 7; liquid outlet at lower end of liquid reservoir 24 and regenerative plate heat exchangerA liquid supply drying filter 27 is arranged between the two pipes 29; the unit return air filter 28 is arranged on the pipeline V between the heat recovery plate type heat exchanger 29 and the evaporator return air interface 17, the refrigerating unit body is further provided with an oil return system, the oil return system comprises an oil separator 26 and an oil storage tank 8, a safety valve is arranged on the oil storage tank 8, the oil separator 26 is arranged on the pipeline II, an oil outlet of the oil separator 26 is connected with an oil inlet of the oil storage tank 8, an oil outlet of the oil storage tank 8 is connected with the compressor unit and an oil filling port of the liquid storage device 24, an oil path filter 9 is arranged between the oil storage tank 8 and the oil separator 26, an oil return control electromagnetic valve 10 is arranged between the oil path filter 9 and the oil storage tank 8, and the pipeline of the refrigerating unit body is further provided with a plurality of groups of stop valves, ball valves, a pressure switch 11, safety valves and a pressure gauge 3, the unit frame 2 is divided into an upper layer and a lower layer, three low-pressure end compressors and two high-pressure end compressors are arranged on the lower layer of the unit frame 2, a connector module is arranged at the rear end of the upper layer of the unit frame 2, a gas-liquid separator 25 inlet filter, a high-pressure filter 7, a liquid supply drying filter 27, a unit return gas filter 28, a low-pressure end compressor frequency converter 4, a high-pressure end compressor frequency converter 5 and a superheater 21 are arranged on the upper layer of the unit frame 2.
Example 1
High-pressure low-temperature trans-critical CO2Parallel refrigeration unit, its characterized in that includes: the device comprises a box body structure, a compression part, a liquid storage part and a superheater removal device 21, wherein the box body structure comprises an electric control cabinet 1, a unit frame 2 and a connector module, the electric control cabinet 1 is arranged at the front end of the unit frame 2, the connector module is arranged on the unit frame 2, and the compression part, the liquid storage part and the superheater removal device 21 are arranged in the unit frame 2; the joint module comprises an air-cooling machine air inlet interface 20, an air-cooling machine air return interface 19, an evaporator liquid supply interface 18 and an evaporator air return interface 17; the compression part comprises three low-pressure-end compressors and two high-pressure-end compressors, wherein the low-pressure-end compressors comprise a low-pressure-end compressor I14, a low-pressure-end compressor II 15 andlow pressure end compressor III 16, the high pressure end compressor includes I12 of high pressure end compressor and II 13 of high pressure end compressor, I14 of low pressure end compressor, II 15 of low pressure end compressor, III 16 of low pressure end compressor, I12 of high pressure end compressor and II 13 of high pressure end compressor can be with CO2Compressing the gas to a very high gas pressure, wherein three low-pressure-end compressors are respectively provided with a low-pressure-end compressor frequency converter 4, and two high-pressure-end compressors are respectively provided with a high-pressure-end compressor frequency converter 5; the liquid storage part is a high-pressure-resistant liquid storage device; a low-pressure end compressor output port of the low-pressure end compressor is connected with a superheater 21 removing air inlet of the superheater 21 through a pipeline I30, a superheater 21 return air port of the superheater 21 and a liquid accumulator 24 gas output port are connected with a high-pressure end compressor input port of the high-pressure end compressor through a Y-shaped pipeline 31, a liquid accumulator back pressure valve 22 is arranged at the liquid accumulator 24 gas output port, a liquid accumulator safety valve 23 is arranged on the liquid accumulator 24, a high-pressure end compressor output port of the high-pressure end compressor is connected with the air cooling machine air inlet port 20 through a pipeline II 32, the air cooling machine return air port 19 is connected with a high-pressure input port of the liquid accumulator 24 through a pipeline III 33, a liquid output port at the lower end of the liquid accumulator 24 is connected with the evaporator liquid supply port 18 through a pipeline IV 34, and the evaporator return air port 17 is connected with a low-pressure end compressor input port of the low-pressure end compressor through a, the refrigerating unit is also provided with a regenerative plate heat exchanger 29, an inlet filter of the gas-liquid separator 25, the high-pressure filter 7, a liquid supply drying filter 27 and a unit gas return filter 28, and the regenerative plate heat exchanger 29 is arranged between the pipeline IV and the pipeline V; an inlet filter of the gas-liquid separator 25 and the gas-liquid separator 25 are arranged on a branch pipe of the Y-shaped pipeline, which is connected with the input port of the high-pressure end compressor, and the gas-liquid separator 25 is connected between the inlet filter of the gas-liquid separator 25 and the input port of the high-pressure end compressor; the high-pressure filter 7 is arranged on the pipeline III, and an air cooler back pressure valve 6 is arranged at one end, connected with the liquid reservoir 24, of the high-pressure filter 7; a liquid outlet at the lower end of the liquid reservoir 24 and the heat regenerative plate type heat exchanger 29 are arranged betweenA liquid supply drying filter 27; the unit return air filter 28 is arranged on the pipeline V between the heat recovery plate type heat exchanger 29 and the evaporator return air interface 17, the refrigerating unit body is further provided with an oil return system, the oil return system comprises an oil separator 26 and an oil storage tank 8, a safety valve is arranged on the oil storage tank 8, the oil separator 26 is arranged on the pipeline II, an oil outlet of the oil separator 26 is connected with an oil inlet of the oil storage tank 8, an oil outlet of the oil storage tank 8 is connected with the compressor unit and an oil filling port of the liquid storage device 24, an oil path filter 9 is arranged between the oil storage tank 8 and the oil separator 26, an oil return control electromagnetic valve 10 is arranged between the oil path filter 9 and the oil storage tank 8, and the pipeline of the refrigerating unit body is further provided with a plurality of groups of stop valves, ball valves, a pressure switch 11, safety valves and a pressure gauge 3, the unit frame 2 is divided into an upper layer and a lower layer, three low-pressure end compressors and two high-pressure end compressors are arranged on the lower layer of the unit frame 2, a connector module is arranged at the rear end of the upper layer of the unit frame 2, a gas-liquid separator 25 inlet filter, a high-pressure filter 7, a liquid supply drying filter 27, a unit return gas filter 28, a low-pressure end compressor frequency converter 4, a high-pressure end compressor frequency converter 5 and a superheater 21 are arranged on the upper layer of the unit frame 2.
When the air-conditioning unit is used, the unit needs to be externally connected with an evaporator and an air cooler. The low-pressure end compressor returns CO from the evaporation end2The gas is subjected to primary compression to obtain CO after high-temperature and medium-pressure compression2The gas enters the desuperheater 21 to be cooled. Medium pressure CO in the upper half of said reservoir 242The gas is depressurized by the reservoir back pressure valve 22 and then is subjected to CO removal with the superheater 212After the return gas is mixed, the mixture enters the gas-liquid separator 25 to realize gas-liquid separation. Mixed CO2Gas enters the high-pressure end compressor for secondary compression, and is compressed into high-temperature and high-pressure CO2And the gas enters the oil separator 26 to realize oil-gas separation. Separated high pressure CO2The gas enters the air cooler outside the unit for cooling through the air inlet interface 20 of the air coolerThen enters the high-pressure filter 7 for filtering through the air return interface 19 of the air cooler, and then is reduced in pressure through the back pressure valve 6 of the air cooler to become medium-pressure CO2The gas-liquid mixture enters the reservoir 24. Liquid CO in the reservoir 242The liquid enters the liquid supply drying filter 27 through a liquid outlet at the bottom of the liquid storage device 24, then passes through the heat recovery plate type heat exchanger 29, enters the evaporator through the liquid supply interface 18 of the evaporator of the unit for evaporation and refrigeration, and is changed into low-pressure low-temperature CO2A gas. CO after evaporation refrigeration2The gas passes through the evaporator return air interface 17 of the unit, passes through the heat recovery plate type heat exchanger 29, enters the low-pressure end compressor for compression, and completes a refrigeration working cycle. The lubricating oil separated in the oil separator 26 passes through the oil filter 9 and the return oil control solenoid valve 10, and enters the oil storage tank 8. The medium-pressure lubricating oil in the oil storage tank 8 enters each compressor to lubricate under the action of pressure difference
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (6)
1. High-pressure low-temperature trans-critical CO2Parallel refrigeration unit, its characterized in that includes: the device comprises a box body structure, a compression part, a liquid storage part and a superheater removal device, wherein the box body structure comprises an electric control cabinet, a unit frame and a connector module, the electric control cabinet is arranged at the front end of the unit frame, the connector module is arranged on the unit frame, and the compression part, the liquid storage part and the superheater removal device are arranged in the unit frame; the joint module comprises an air inlet interface of the air cooler, an air return interface of the air cooler and liquid supply of the evaporatorThe interface and the air return interface of the evaporator; the compression part comprises three low-pressure-end compressors and two high-pressure-end compressors; the liquid storage part is a high-pressure-resistant liquid storage device; the low-pressure end compressor output port of the low-pressure end compressor is connected with a superheater air inlet of the superheater, a superheater return air outlet of the superheater and a gas output port of the liquid accumulator are connected with a high-pressure end compressor input port of the high-pressure end compressor through a Y-shaped pipeline, a high-pressure end compressor output port of the high-pressure end compressor is connected with a gas inlet port of the gas-cooled machine through a pipeline II, the gas return port of the gas-cooled machine is connected with a high-pressure input port of the liquid accumulator through a pipeline III, a liquid output port at the lower end of the liquid accumulator is connected with a liquid supply port of the evaporator through a pipeline IV, and the gas return port of the evaporator is connected with a low-pressure end compressor input port of the low-pressure end compressor through a pipeline V.
2. The high-pressure low-temperature transcritical CO according to claim 12The parallel refrigerating unit is characterized by further comprising a regenerative plate heat exchanger, a gas-liquid separator inlet filter, a gas-liquid separator, a high-pressure filter, a liquid supply drying filter and a unit gas return filter, wherein the regenerative plate heat exchanger is arranged between the pipeline IV and the pipeline V; the branch pipe of the Y-shaped pipeline connected with the input port of the high-pressure end compressor is provided with the gas-liquid separator inlet filter and the gas-liquid separator, and the gas-liquid separator is connected between the gas-liquid separator inlet filter and the input port of the high-pressure end compressor; the high-pressure filter is arranged on the pipeline III; a liquid supply drying filter is arranged between a liquid output port at the lower end of the liquid reservoir and the heat recovery plate type heat exchanger; and the unit air return filter is arranged on the pipeline V between the heat return plate type heat exchanger and the air return interface of the evaporator.
3. The high-pressure low-temperature transcritical CO according to claim 22The parallel refrigerating unit is characterized in that the refrigerating unit is also provided with an oil return system, and the oil return systemThe system comprises an oil separator and an oil storage tank, wherein the oil separator is arranged on the pipeline II, an oil outlet of the oil separator is connected with an oil inlet of the oil storage tank, an oil outlet of the oil storage tank is connected with a compressor unit and an oil filling port of the liquid reservoir, an oil way filter is arranged between the oil storage tank and the oil separator, and an oil return control electromagnetic valve is arranged between the oil way filter and the oil storage tank.
4. The high-pressure low-temperature trans-critical CO according to claim 32The parallel refrigerating unit is characterized in that three low-pressure-end compressors are respectively provided with a low-pressure-end compressor frequency converter, and two high-pressure-end compressors are respectively provided with a high-pressure-end compressor frequency converter.
5. The high-pressure low-temperature trans-critical CO according to claim 42The parallel refrigerating unit is characterized in that a liquid accumulator back pressure valve is arranged at a gas outlet of the liquid accumulator, a liquid accumulator safety valve is arranged on the liquid accumulator, a gas cooler back pressure valve is arranged at one end, connected with the liquid accumulator, of the high-pressure filter, a safety valve is arranged on the oil storage tank, and a plurality of groups of stop valves, ball valves, pressure switches, safety valves and pressure gauges are further arranged on a pipeline of the refrigerating unit body.
6. The high-pressure low-temperature trans-critical CO according to claim 52The parallel refrigerating unit is characterized in that the unit frame is divided into an upper layer and a lower layer, three low-pressure-end compressors and two high-pressure-end compressors are arranged on the lower layer of the unit frame, the joint module is arranged at the rear end of the upper layer of the unit frame, and the gas-liquid separator inlet filter, the high-pressure filter, the liquid supply drying filter, the unit return gas filter, the low-pressure-end compressor frequency converter, the high-pressure-end compressor frequency converter and the superheater removal device are arranged on the upper layer of the unit frame.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114739071A (en) * | 2022-04-13 | 2022-07-12 | 天津大学 | Ice rink refrigeration plant and system |
| CN114739072A (en) * | 2022-04-13 | 2022-07-12 | 天津大学 | Ice rink refrigerating system |
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2020
- 2020-07-15 CN CN202021393487.1U patent/CN213040784U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114739071A (en) * | 2022-04-13 | 2022-07-12 | 天津大学 | Ice rink refrigeration plant and system |
| CN114739072A (en) * | 2022-04-13 | 2022-07-12 | 天津大学 | Ice rink refrigerating system |
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Address after: 116600 No. 8 Songlan Street, Dalian Economic and Technological Development Zone, Liaoning Province Patentee after: Bingshan Songyang Refrigerator System (Dalian) Co.,Ltd. Address before: 116000 No.8 Songlan street, Jinzhou new district, Dalian City, Liaoning Province Patentee before: PANASONIC REFRIGERATOR SYSTEM (DALIAN) CO.,LTD. |
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