CN213208266U - Low-temperature trans-critical CO2Parallel refrigerating unit - Google Patents
Low-temperature trans-critical CO2Parallel refrigerating unit Download PDFInfo
- Publication number
- CN213208266U CN213208266U CN202021391487.8U CN202021391487U CN213208266U CN 213208266 U CN213208266 U CN 213208266U CN 202021391487 U CN202021391487 U CN 202021391487U CN 213208266 U CN213208266 U CN 213208266U
- Authority
- CN
- China
- Prior art keywords
- unit
- liquid
- compressor
- low
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The utility model provides a low temperature type trans-critical CO2A parallel refrigeration unit comprising: the compressor unit comprises a box body structure, a compressor unit, a liquid storage device and a maintenance unit, 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 compressor unitThe reservoir with it installs to maintain the unit in the unit frame, maintain the refrigerating plant of unit for having refrigerant, the maintenance unit plate heat exchanger that maintains the unit is connected of reservoir is quick-witted gas outlet and is maintained quick-witted liquid return port department of maintaining of reservoir, the utility model discloses mainly utilize the compressor through the two-stage with CO2CO conversion from low to high pressure2Circulating to realize CO in low temperature environment2And (5) refrigerating.
Description
Technical Field
The utility model relates to a CO2The technical field of refrigerating machines, in particular to a low-temperature transcritical CO2And the refrigeration units are connected in parallel.
Background
Starting in the 70's of the 20 th century, CFCs and HCFCs were found to destroy the atmospheric ozone layer, while their greenhouse effect index is high, and are gradually facing a global ban. CO22Is a natural refrigerant which is non-toxic and non-flammable, has zero ozone depletion potential, 1 global warming potential and CO2Also has excellent thermophysical properties. Thus, transcritical CO is employed2The refrigerating system is widely applied to the field of refrigeration again. At present, transcritical CO is used2The parallel refrigerating unit is not widely applied at home. Existing low temperature type transcritical CO2The parallel refrigerating units generally have the following problems: the unit is maintained to be positioned on the outer side of the top of the unit frame, so that the overall height of the unit is large; the layout of each part of the unit is not compact enough, so that the whole occupied area of the unit is large; the external pipe layout of the unit is scattered, so that the field pipe connection is disordered, and the unit is not favorable forMaintaining; the installation positions of a pressure gauge, a pressure switch and the like are scattered, and the field monitoring and inspection are not facilitated. Based on objective actual requirements and solves the problems existing in the prior art.
Design of low-temperature transcritical CO according to the attack requirement2And the refrigeration units are connected in parallel.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned problems, a low-temperature transcritical CO system is provided2And the refrigeration units are connected in parallel. The utility model mainly utilizes the compressor passing through two stages to compress CO2CO conversion from low to high pressure2Circulating to realize CO in low temperature environment2And (5) refrigerating.
The utility model discloses a technical means as follows:
low-temperature trans-critical CO2Parallel refrigeration unit, its characterized in that includes: the system comprises a box body structure, a compressor unit, a liquid storage device and a maintaining unit, 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, the compressor unit, the liquid storage device and the maintaining unit are arranged in the unit frame, and the connector module comprises a superheater air inlet interface, a superheater air return interface, an air cooler air inlet interface, an air cooler air return interface, an evaporator liquid supply interface and an evaporator air return interface; the compressor unit comprises a low-pressure end compressor and a high-pressure end compressor, the low-pressure end compressor comprises a low-pressure end compressor I and a low-pressure end compressor II, and the high-pressure end compressor comprises a high-pressure end compressor I and a high-pressure end compressor II; the low-pressure end compressor output port of the low-pressure end compressor is connected with the superheater air inlet interface through a pipeline I, the superheater air return interface and the liquid accumulator gas output port are connected with the high-pressure end compressor input port of the high-pressure end compressor through a Y-shaped pipeline, the high-pressure end compressor output port of the high-pressure end compressor is connected with the air inlet interface of the air cooling machine through a pipeline II, the air return interface of the air cooling machine is connected with the high-pressure input port of the liquid accumulator through a pipeline III, and the liquid at the lower end of the liquid accumulator is conveyed and deliveredThe outlet is connected with the liquid supply interface of the evaporator through a pipeline IV, the air return interface of the evaporator is connected with the input port of the low-pressure-end compressor through a pipeline V, the maintaining unit is a refrigerating device with refrigerating media, and the plate type heat exchanger of the maintaining unit is connected with the air outlet of the maintaining unit and the liquid return port of the maintaining unit of the liquid accumulator.
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.
Further, two 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, and a plurality of groups of stop valves, ball valves, safety valves and pressure gauges are further arranged on a pipeline of the refrigerating unit body.
Further, the gas-liquid separator inlet filter, the high-pressure filter, the liquid supply drying filter, the unit gas return filter, the low-pressure end compressor frequency converter, the high-pressure end compressor frequency converter and the maintaining unit are arranged on the outer side of the unit frame; the superheater air inlet interface, the superheater air return interface, the air cooling machine air inlet interface, the air cooling machine air return interface, the evaporator liquid supply interface and the evaporator air return interface are arranged at the rear end of the unit frame in a centralized manner.
The utility model has the advantages of it is following:
1. the utility model provides a pair of critical CO is striden to low temperature type2The parallel refrigerating unit adopts multi-unit parallel double-stage compression 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 critical CO is striden to low temperature type2The 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 critical CO is striden to low temperature type2The 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 low-temperature transcritical CO2Schematic diagram i of a parallel refrigeration unit.
FIG. 2 shows the utility model of a low-temperature transcritical CO2Schematic diagram ii of the parallel refrigeration unit.
FIG. 3 shows the 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 I; 5. a low pressure switch; 6. a low-pressure end compressor II; 7. maintaining the unit; 8. a reservoir back pressure valve; 9. a high pressure filter; 10. a gas cooler back pressure valve; 11. a liquid supply drying filter; 12. an oil separator; 13. a high-pressure end compressor I; 14. a high pressure switch; 15. a high-pressure end compressor II; 16. a liquid supply interface of the evaporator; 17. an air return interface of the evaporator; 18. an air inlet interface of the superheater is removed; 19. a gas return interface of the superheater is removed; 20. an air cooler air inlet interface; 21. an air return interface of the air cooler; 22. a reservoir safety valve; 23. maintaining the plate heat exchanger of the unit; 24. an oil storage tank; 25. an oil path filter; 26. an oil return control solenoid valve; 27. a low-pressure end compressor frequency converter; 28. a high-pressure end compressor frequency converter; 29. a gas-liquid separator; 30. a regenerative plate heat exchanger; 31. a unit return air filter; 32. an inlet filter of the gas-liquid separator; 33. a reservoir; 34. a pipeline I; 35. a Y-shaped pipeline; 36. a pipeline II; 37. a pipeline III; 38. a pipeline IV; 39. 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.
Low temperatureType transcritical CO2A parallel refrigeration unit comprising: the system comprises a box structure, a compressor unit, a liquid storage device and a maintaining unit, wherein the box 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, the compressor unit, the liquid storage device and the maintaining unit are arranged in the unit frame 2, and the connector module comprises a superheater air inlet interface 18, a superheater air return interface 19, an air cooler air inlet interface 20, an air cooler air return interface 21, an evaporator liquid supply interface 16 and an evaporator air return interface 17; the compressor unit comprises a low-pressure end compressor and a high-pressure end compressor, the low-pressure end compressor comprises a low-pressure end compressor I4 and a low-pressure end compressor II 6, the high-pressure end compressor comprises a high-pressure end compressor I13 and a high-pressure end compressor II 15, the two low-pressure end compressors are respectively provided with a low-pressure end compressor frequency converter 27, and the two high-pressure end compressors are respectively provided with a high-pressure end compressor frequency converter 28; an output port of a low-pressure end compressor of the low-pressure end compressor is connected with the superheater-removing air inlet interface 18 through a pipeline I34, a gas output port of the superheater-removing air return interface 19 and a gas output port of the liquid accumulator 33 are connected with an input port of the high-pressure end compressor through a Y-shaped pipeline 35, an output port of the high-pressure end compressor is connected with the air inlet interface 20 of the air cooler through a pipeline II 36, an air return interface 21 of the air cooler is connected with a high-pressure input port of the liquid accumulator 33 through a pipeline III 37, a liquid output port at the lower end of the liquid accumulator 33 is connected with the evaporator liquid supply interface 16 through a pipeline IV 38, an evaporator air return interface 17 is connected with an input port of the low-pressure end compressor through a pipeline V39, the maintaining unit 7 is a refrigerating device with a refrigerating medium, and a maintaining unit plate type heat exchanger 23 of the The port and the liquid return port of the maintenance machine, the refrigerating unit is also provided with a heat return plate type heat exchanger 30, a gas-liquid separator inlet filter 32, a gas-liquid separator 29, a high-pressure filter 9, a liquid supply drying filter 11 and a unit gas return filter 31, and the heat return plate type heat exchanger is arranged between the pipeline IV 38 and the pipeline V39A regenerative plate heat exchanger 30; the branch pipe of the Y-shaped pipeline 35 connected with the input port of the high-pressure end compressor is provided with the gas-liquid separator inlet filter 32 and the gas-liquid separator 29, and the gas-liquid separator 29 is connected between the gas-liquid separator inlet filter 32 and the input port of the high-pressure end compressor; the high-pressure filter 9 is arranged on the pipeline III 37; a liquid supply drying filter 11 is arranged between a liquid output port at the lower end of the liquid reservoir 33 and the regenerative plate heat exchanger 30; the unit return air filter 31 is arranged on the pipeline V39 between the heat recovery plate type heat exchanger 30 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 12 and an oil storage tank 24, the oil separator 12 is arranged on the pipeline II 36, an oil outlet of the oil separator 12 is connected with an oil inlet of the oil storage tank 24, an oil outlet of the oil storage tank 24 is connected with the compressor unit and an oil filling port of the liquid accumulator 33, an oil path filter 25 is arranged between the oil storage tank 24 and the oil separator, an oil return control electromagnetic valve 26 is arranged between the oil path filter 25 and the oil storage tank 24, a liquid accumulator back pressure valve 8 is arranged at a gas outlet of the liquid accumulator 33, and a gas cooler back pressure valve 10 is arranged at one end of the high pressure filter 9, which is connected with the liquid accumulator 33, the liquid storage tank 33 is provided with a liquid storage safety valve 22, the pipeline of the refrigerating unit body is also provided with a plurality of groups of stop valves, ball valves, safety valves and pressure gauges 3, and the gas-liquid separator inlet filter 32, the high-pressure filter 29, the liquid supply drying filter 11, the unit return air filter 31, the low-pressure end compressor frequency converter 27, the high-pressure end compressor frequency converter 28 and the maintaining unit 7 are arranged on the outer side of the unit frame 2; the air inlet interface 18 for the superheater, the air return interface 19 for the superheater, the air inlet interface 20 for the air-cooled machine, the air return interface 21 for the air-cooled machine, the liquid supply interface 16 for the evaporator, and the air return interface 17 for the evaporator are collectively disposed at the rear end of the unit frame 2.
Example 1
As shown in figures 1-3, the utility model provides a low-temperature transcritical CO2Parallel refrigerating unit and bagComprises the following steps: the system comprises a box structure, a compressor unit, a liquid storage device and a maintaining unit, wherein the box 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, the compressor unit, the liquid storage device and the maintaining unit are arranged in the unit frame 2, and the connector module comprises a superheater air inlet interface 18, a superheater air return interface 19, an air cooler air inlet interface 20, an air cooler air return interface 21, an evaporator liquid supply interface 16 and an evaporator air return interface 17; the compressor unit comprises a low-pressure end compressor and a high-pressure end compressor, the low-pressure end compressor comprises a low-pressure end compressor I4 and a low-pressure end compressor II 6, the high-pressure end compressor comprises a high-pressure end compressor I13 and a high-pressure end compressor II 15, the two low-pressure end compressors are respectively provided with a low-pressure end compressor frequency converter 27, and the two high-pressure end compressors are respectively provided with a high-pressure end compressor frequency converter 28; an output port of a low-pressure end compressor of the low-pressure end compressor is connected with the superheater-removing air inlet interface 18 through a pipeline I34, a gas output port of the superheater-removing air return interface 19 and a gas output port of the liquid accumulator 33 are connected with an input port of the high-pressure end compressor through a Y-shaped pipeline 35, an output port of the high-pressure end compressor is connected with the air inlet interface 20 of the air cooler through a pipeline II 36, an air return interface 21 of the air cooler is connected with a high-pressure input port of the liquid accumulator 33 through a pipeline III 37, a liquid output port at the lower end of the liquid accumulator 33 is connected with the evaporator liquid supply interface 16 through a pipeline IV 38, an evaporator air return interface 17 is connected with an input port of the low-pressure end compressor through a pipeline V39, the maintaining unit 7 is a refrigerating device with a refrigerating medium, and a maintaining unit plate type heat exchanger 23 of the The port and the liquid return port of the maintenance machine, the refrigerating unit is also provided with a regenerative plate type heat exchanger 30, a gas-liquid separator inlet filter 32, a gas-liquid separator 29, a high-pressure filter 9, a liquid supply drying filter 11 and a unit gas return filter 31, and the regenerative plate type heat exchanger 30 is arranged between the pipeline IV 38 and the pipeline V39; the Y-shaped pipeline 35 is connectedThe gas-liquid separator inlet filter 32 and the gas-liquid separator 29 are arranged on a branch pipe of the input port of the high-pressure end compressor, and the gas-liquid separator 29 is connected between the gas-liquid separator inlet filter 32 and the input port of the high-pressure end compressor; the high-pressure filter 9 is arranged on the pipeline III 37; a liquid supply drying filter 11 is arranged between a liquid output port at the lower end of the liquid reservoir 33 and the regenerative plate heat exchanger 30; the unit return air filter 31 is arranged on the pipeline V39 between the heat recovery plate type heat exchanger 30 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 12 and an oil storage tank 24, the oil separator 12 is arranged on the pipeline II 36, an oil outlet of the oil separator 12 is connected with an oil inlet of the oil storage tank 24, an oil outlet of the oil storage tank 24 is connected with the compressor unit and an oil filling port of the liquid accumulator 33, an oil path filter 25 is arranged between the oil storage tank 24 and the oil separator, an oil return control electromagnetic valve 26 is arranged between the oil path filter 25 and the oil storage tank 24, a liquid accumulator back pressure valve 8 is arranged at a gas outlet of the liquid accumulator 33, and a gas cooler back pressure valve 10 is arranged at one end of the high pressure filter 9, which is connected with the liquid accumulator 33, the liquid storage tank 33 is provided with a liquid storage safety valve 22, the pipeline of the refrigerating unit body is also provided with a plurality of groups of stop valves, ball valves, safety valves and pressure gauges 3, and the gas-liquid separator inlet filter 32, the high-pressure filter 29, the liquid supply drying filter 11, the unit return air filter 31, the low-pressure end compressor frequency converter 27, the high-pressure end compressor frequency converter 28 and the maintaining unit 7 are arranged on the outer side of the unit frame 2; the air inlet interface 18 for the superheater, the air return interface 19 for the superheater, the air inlet interface 20 for the air-cooled machine, the air return interface 21 for the air-cooled machine, the liquid supply interface 16 for the evaporator, and the air return interface 17 for the evaporator are collectively disposed at the rear end of the unit frame 2.
The use time group needs an external evaporator, an air cooler and a desuperheater. 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 compression2And the gas enters the desuperheater positioned outside the unit for cooling through the desuperheater gas inlet interface 18, and then returns to the unit system through the desuperheater gas return interface 19. Medium pressure CO in the upper half of the reservoir 332The gas is depressurized by the liquid accumulator back pressure valve 8 and then is subjected to CO removal from the superheater2After being mixed, the return gas passes through the gas-liquid separator inlet filter 32 and enters the gas-liquid separator 29 to realize gas-liquid separation. Mixed CO2The gas enters a high-pressure end compressor for secondary compression, and is compressed into high-temperature and high-pressure CO2And gas enters the oil separator 12 to realize oil-gas separation. Separated high pressure CO2Gas enters the gas cooler outside the unit through the gas inlet interface 20 of the gas cooler for cooling, then enters the high-pressure filter 9 through the gas cooler return interface 21 for filtering, and then is reduced in pressure through the gas cooler back pressure valve 10 to become medium-pressure CO2The gas-liquid mixed state enters the reservoir 33. Liquid CO in the reservoir 332The liquid enters the liquid supply drying filter 11 through a liquid outlet at the bottom of the liquid storage device 33, then passes through the heat recovery plate type heat exchanger 30, enters the evaporator through the liquid supply interface 16 at the evaporation end of the unit, is evaporated and refrigerated, and is changed into low-pressure low-temperature CO2A gas. CO after evaporation refrigeration2The gas passes through the evaporation end gas return interface 17 of the unit, passes through the heat recovery plate type heat exchanger 30, enters the high-pressure end compressor for compression, and completes a refrigeration working cycle. The lubricating oil separated in the oil separator 12 passes through the oil filter 25 and the return oil control solenoid valve 26, and enters the oil storage tank 24. The medium-pressure lubricating oil in the oil tank 24 enters each compressor for lubrication under the action of the pressure difference. The maintaining unit 7 is mainly used for absorbing heat and evaporating liquid CO2 inside the liquid reservoir 33 when the unit is powered off, and when the pressure inside the liquid reservoir 33 rises to exceed a set value, the maintaining unit 7 operates to cool CO2 gas inside the liquid reservoir 33 through the maintaining unit plate heat exchanger 23, reduce the pressure inside the liquid reservoir 33, and thus control the pressure inside the liquid reservoir 33.
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. Low-temperature trans-critical CO2Parallel refrigeration unit, its characterized in that includes: the system comprises a box body structure, a compressor unit, a liquid storage device and a maintaining unit, 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, the compressor unit, the liquid storage device and the maintaining unit are arranged in the unit frame, and the connector module comprises a superheater air inlet interface, a superheater air return interface, an air cooler air inlet interface, an air cooler air return interface, an evaporator liquid supply interface and an evaporator air return interface; the compressor unit comprises a low-pressure end compressor and a high-pressure end compressor, the low-pressure end compressor comprises a low-pressure end compressor I and a low-pressure end compressor II, and the high-pressure end compressor comprises a high-pressure end compressor I and a high-pressure end compressor II; the low-pressure end compressor output port of the low-pressure end compressor is connected with the superheater air inlet interface through a pipeline I, the superheater air return interface and the gas output port of the liquid accumulator are connected with the high-pressure end compressor input port of the high-pressure end compressor through a Y-shaped pipeline, the high-pressure end compressor output port of the high-pressure end compressor is connected with the air cooling machine air inlet interface through a pipeline II, the air cooling machine air return interface is connected with the high-pressure input port of the liquid accumulator through a pipeline III, the liquid output port at the lower end of the liquid accumulator is connected with the evaporator liquid supply interface through a pipeline IV, and the evaporator air return interface is connected with the low-pressure end compressor air inlet interface of the low-pressure end compressor through a pipeline VThe maintaining unit is a refrigerating device with a refrigerating medium, and a maintaining unit plate heat exchanger of the maintaining unit is connected with a maintaining unit air outlet and a maintaining unit liquid return port of the liquid storage device.
2. The 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 low-temperature transcritical CO according to claim 12The parallel refrigerating unit is characterized in that the refrigerating unit body is further provided with an oil return system, the oil return system comprises an oil separator and an oil storage tank, 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 the 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 low-temperature transcritical CO according to claim 22The parallel refrigerating unit is characterized in that the two low-pressure-end compressors are respectively provided with a low-pressure-end pressureAnd the two high-pressure end compressors are respectively provided with a high-pressure end compressor frequency converter.
5. The low-temperature transcritical CO according to claim 22The parallel refrigerating unit is characterized in that a liquid storage device backpressure valve is arranged at a gas outlet of the liquid storage device, a gas cooler backpressure valve is arranged at one end of the high-pressure filter connected with the liquid storage device, a liquid storage device safety valve is arranged on the liquid storage device, and a plurality of groups of stop valves, ball valves, safety valves and pressure gauges are further arranged on a pipeline of the refrigerating unit body.
6. The low-temperature trans-critical CO according to claim 42The parallel refrigerating unit is characterized in that the gas-liquid separator inlet filter, the high-pressure filter, the liquid supply drying filter, the unit gas return filter, the low-pressure end compressor frequency converter, the high-pressure end compressor frequency converter and the maintaining unit are arranged on the outer side of the unit frame; the superheater air inlet interface, the superheater air return interface, the air cooling machine air inlet interface, the air cooling machine air return interface, the evaporator liquid supply interface and the evaporator air return interface are arranged at the rear end of the unit frame in a centralized manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021391487.8U CN213208266U (en) | 2020-07-15 | 2020-07-15 | Low-temperature trans-critical CO2Parallel refrigerating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021391487.8U CN213208266U (en) | 2020-07-15 | 2020-07-15 | Low-temperature trans-critical CO2Parallel refrigerating unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213208266U true CN213208266U (en) | 2021-05-14 |
Family
ID=75833503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021391487.8U Active CN213208266U (en) | 2020-07-15 | 2020-07-15 | Low-temperature trans-critical CO2Parallel refrigerating unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213208266U (en) |
-
2020
- 2020-07-15 CN CN202021391487.8U patent/CN213208266U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203274344U (en) | Energy-saving cascade refrigerating system | |
| CN107843020A (en) | A kind of Trans-critical cycle CO2Two-stage Compression is pressurized refrigeration system | |
| CN213040784U (en) | High-pressure low-temperature trans-critical CO2Parallel refrigerating unit | |
| CN103528256A (en) | Composite evaporative cooling device with natural cooling function for large-scale equipment | |
| CN213208266U (en) | Low-temperature trans-critical CO2Parallel refrigerating unit | |
| CN207487165U (en) | Superposition type air-cooled condensing group | |
| CN207570149U (en) | indirect refrigeration system | |
| CN203533948U (en) | Compound type evaporative type cooling device having natural cooling function and used for large-scale device | |
| CN215892823U (en) | CO with intermediate refrigerant supercooling2Two-stage compression refrigerating system | |
| CN201885488U (en) | Screw type cooling system and control method thereof | |
| CN211823239U (en) | Ultra-low temperature transcritical cascade refrigeration system | |
| CN214665330U (en) | With CO2Refrigerating system as refrigerant and secondary refrigerant system thereof | |
| CN212274317U (en) | System for preparing high-temperature hot water by utilizing waste heat recovery in refrigeration system | |
| CN213873292U (en) | Novel throttling conversion device suitable for double cold source units | |
| CN115031421A (en) | Low-temperature skid-mounted refrigerating unit of hydrogenation machine | |
| CN212778015U (en) | Direct-expansion type piston parallel refrigeration system for cold filling station | |
| CN204574590U (en) | A kind of mixed type frequency conversion low-temperature quick-freezing device peculiar to vessel | |
| CN210688817U (en) | Gas suspension intermediate-deep secondary utilization ground source heat pump unit | |
| CN208688021U (en) | A kind of agricultural machinery refrigerating circulatory device | |
| CN208419258U (en) | A kind of cascade superhigh temperature hot water air source heat pump system | |
| CN209355535U (en) | A kind of refrigerating type low-temperature circulating device | |
| CN113028671A (en) | With CO2Refrigerating system as refrigerant and secondary refrigerant system thereof | |
| CN205119543U (en) | Cold storage refrigeration system | |
| CN205505472U (en) | Freon CO2 overlapping sled piece unit formula refrigerating system | |
| CN206648403U (en) | A kind of carbon dioxide cryogenic condensation unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
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. |