CN212902076U - Circulating refrigerating system - Google Patents
Circulating refrigerating system Download PDFInfo
- Publication number
- CN212902076U CN212902076U CN202021815878.8U CN202021815878U CN212902076U CN 212902076 U CN212902076 U CN 212902076U CN 202021815878 U CN202021815878 U CN 202021815878U CN 212902076 U CN212902076 U CN 212902076U
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- CN
- China
- Prior art keywords
- heat exchanger
- compressor
- condenser
- refrigeration
- refrigeration system
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- 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.)
- Expired - Fee Related
Links
- 238000005057 refrigeration Methods 0.000 claims abstract description 44
- 239000003507 refrigerant Substances 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims description 12
- 125000004122 cyclic group Chemical group 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 24
- 229910021529 ammonia Inorganic materials 0.000 abstract description 12
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000004321 preservation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model discloses a circulating refrigeration system, which comprises a compressor, a condenser and a refrigeration area, wherein a first bypass pipeline is arranged between an air outlet and an air return port of the compressor, a three-way valve is arranged on one side of the first bypass pipeline close to the compressor, one end of the condenser is connected with the air outlet of the compressor, and the other end of the condenser is connected to the refrigeration area; be provided with first heat exchanger between refrigeration district and the compressor, be provided with the second heat exchanger between compressor and the condenser, be provided with middle heat transfer device between first heat exchanger and the second heat exchanger, middle heat transfer device includes third heat exchanger and fourth heat exchanger, is provided with the pipeline between third heat exchanger and the fourth heat exchanger. The utility model discloses simple structure can improve the security of ammonia as the refrigerant, reduces the harm that takes place to leak the accident, improves heat transfer device's heat exchange efficiency in the middle of to utilize single compressor can create a circulation system that can realize multiple refrigeration temperature.
Description
Technical Field
The utility model relates to a refrigeration plant technical field, concretely relates to circulation refrigerating system.
Background
The compressor of the refrigeration principle of a general refrigerator has the function of compressing steam with lower pressure into steam with higher pressure, so that the volume of the steam is reduced, and the pressure is increased. The compressor sucks working medium steam with lower pressure from the evaporator, the working medium steam with lower pressure is sent into the condenser after the pressure of the working medium steam is increased, the working medium steam is condensed into liquid with higher pressure in the condenser, the liquid with lower pressure is sent into the evaporator after the liquid is throttled by the throttle valve, the liquid is evaporated by absorbing heat in the evaporator to form steam with lower pressure, and the steam is sent into an inlet of the compressor, so that the refrigeration cycle is completed.
However, most of the existing refrigeration systems can only obtain refrigeration temperature within a certain range in a large environment, if the refrigeration effect with large-range temperature variation is to be achieved, different refrigeration equipment is needed, the occupied area is large, the use cost is high, meanwhile, due to the mature synthesis process of the ammonia refrigerant, the preparation is easy, the price is low, ammonia is generally used as the refrigerant in a specific occasion such as a refrigeration house for cooling and refrigeration, but ammonia is used as the refrigerant, and due to the flammability and toxicity of ammonia, once ammonia leakage occurs, serious safety accidents are easily caused.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a circulation refrigerating system, simple structure can improve the security of ammonia as the refrigerant, reduces the harm that takes place to leak the accident, heat transfer device's heat exchange efficiency in the middle of improving to utilize single compressor can create a circulation system that can realize multiple refrigeration temperature.
In order to solve the technical problem, the utility model provides a circulating refrigeration system, including compressor, condenser and refrigeration district, still be provided with first bypass pipeline between the gas vent of compressor and the return port, one side that first bypass pipeline is close to the compressor is provided with the three-way valve, one end of condenser links to each other with the gas vent of compressor, the other end of condenser is connected to the refrigeration district, be provided with end flow restrictor and end evaporimeter between refrigeration district and the compressor; the refrigeration area comprises a plurality of stages of refrigerators, each stage of refrigerator comprises a gas-liquid separator, a sub-throttling device and a sub-evaporator which are sequentially arranged, a second bypass pipeline is arranged between an inlet and an outlet of the sub-throttling device, and a first bypass valve is arranged on the second bypass pipeline; the refrigeration district with be provided with first heat exchanger between the compressor, the compressor with be provided with the second heat exchanger between the condenser, first heat exchanger with be provided with middle heat transfer device between the second heat exchanger, middle heat transfer device is including the third heat exchanger that is close to first heat exchanger and the fourth heat exchanger that is close to the second heat exchanger, the third heat exchanger with be provided with the connecting pipe between the fourth heat exchanger.
Further, a liquid storage device is arranged between the condenser and the refrigerating area.
Further, an oil separator is arranged between the compressor and the condenser.
Furthermore, a throttling bypass pipeline and a second bypass valve are arranged between the inlet and the outlet of the last throttle.
Furthermore, a hydraulic pump is arranged on the connecting pipe, and a heat preservation pipe is sleeved on the outer side of the pipeline.
Furthermore, the flow direction of the refrigerant in the third heat exchanger is the same as the flow direction of the refrigerant in the first heat exchanger, and the flow direction of the refrigerant in the fourth heat exchanger is the same as the flow direction of the refrigerant in the second heat exchanger.
Furthermore, fans are arranged on the sub-evaporator, the final evaporator and the condenser.
Furthermore, a heat regenerator is arranged between the adjacent refrigerators, a hot flow channel of the heat regenerator is connected between the adjacent gas-liquid separators, and a cold flow channel of the heat regenerator is connected between the adjacent sub-evaporators.
Further, a one-way valve is arranged at the air outlet of the compressor.
The utility model has the advantages that: 1. the system is provided with the multi-stage refrigerating device, so that a circulating system for realizing various refrigerating temperatures can be created by using a single compressor, and the using effect is good;
2. the heat regenerator is separated into two parts, and the heat exchange is carried out by utilizing the intermediate heat exchange device, so that the refrigerating source adopting ammonia as a refrigerant is kept on one side, the ammonia consumption is reduced to the greatest extent, the harm of ammonia during leakage is reduced, the major hazard source of the original ammonia refrigeration of the refrigerating system is changed into a non-major hazard source, and the safety of the refrigerating system is improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
The reference numbers in the figures illustrate: 1. a compressor; 2. a condenser; 3. a refrigeration zone; 4. an exhaust port; 5. an air return port; 6. a first bypass line; 7. a three-way valve; 8. a final flow restrictor; 9. a final evaporator; 10. a refrigerator; 11. a gas-liquid separator; 12. a sub-throttling device; 13. a sub-evaporator; 14. a second bypass line; 15. a first bypass valve; 16. a first heat exchanger; 17. a second heat exchanger; 18. a third heat exchanger; 19. a fourth heat exchanger; 20. a connecting pipe; 21. a reservoir; 22. an oil separator; 23. a throttle bypass line; 24. a second bypass valve; 25. a hydraulic pump; 26. a fan; 27. a heat regenerator; 28. a one-way valve.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Referring to fig. 1, an embodiment of a circulating refrigeration system of the present invention includes a compressor 1, a condenser 2 and a refrigeration area 3, a first bypass pipeline 6 is further disposed between an exhaust port 4 and a return air port 5 of the compressor 1, a three-way valve 7 is disposed on one side of the first bypass pipeline 6 close to the compressor 1, one end of the condenser 2 is connected to the exhaust port 4 of the compressor 1, the other end of the condenser 2 is connected to the refrigeration area 3, and a final throttle 8 and a final evaporator 9 are disposed between the refrigeration area 3 and the compressor 1; the refrigeration area 3 comprises a plurality of stages of refrigerators 10, each stage of refrigerator 10 comprises a gas-liquid separator 11, a sub-throttling device 12 and a sub-evaporator 13 which are sequentially arranged, a second bypass pipeline 14 is arranged between an inlet and an outlet of the sub-throttling device 12, and a first bypass valve 15 is arranged on the second bypass pipeline 14; be provided with first heat exchanger 16 between refrigeration district 3 and the compressor 1, be provided with second heat exchanger 17 between compressor 1 and the condenser 2, be provided with middle heat transfer device between first heat exchanger 16 and the second heat exchanger 17, middle heat transfer device is including being close to the third heat exchanger 18 of first heat exchanger 16 and being close to the fourth heat exchanger 19 of second heat exchanger 17, is provided with connecting pipe 20 between third heat exchanger 18 and the fourth heat exchanger 19.
When the refrigerant bypass type refrigerating system is used, because the first bypass pipeline 6 is arranged on one side of the compressor 1, one of the compressor 1 and the first bypass pipeline 6 bypasses in the working process of the refrigerating system, when the compressor 1 bypasses, the refrigerant enters the compressor 1 from the air return port 5 of the compressor 1, and the refrigerant can be discharged through the air exhaust port 4 of the compressor 1 after being compressed by the compressor 1; when the first bypass pipeline 6 is bypassed, the refrigerant directly flows in from the first end of the first bypass pipeline 6 and flows out from the second section, the multi-stage refrigerator 10 can provide a plurality of using functions with different evaporation temperatures, after the third heat exchanger 18 exchanges heat with the first heat exchanger 16, the heat is transferred to the fourth heat exchanger 19 through the refrigerant, then the fourth heat exchanger 19 exchanges heat with the second heat exchanger 17 to absorb the heat at the second heat exchanger 17, so that the second heat exchanger 17 releases heat, the refrigerating function of the refrigerating device is realized, and the method can prevent ammonia from leaking.
A liquid storage device 21 is arranged between the condenser 2 and the refrigerating area 3, an oil separator 22 is arranged between the compressor 1 and the condenser 2, lubricating oil flowing out of the compressor 1 can be separated, the lubricating effect of each component of the refrigerating system is guaranteed, a hydraulic pump 25 is arranged on a pipeline, a heat preservation pipe is sleeved on the outer side of the pipeline, the flowing direction of a refrigerant in the third heat exchanger 18 is the same as that of the refrigerant in the first heat exchanger 16, the flowing direction of the refrigerant in the fourth heat exchanger 19 is the same as that of the refrigerant in the second heat exchanger 17, and a check valve 28 is arranged at an exhaust port 4 of the compressor 1.
A throttling bypass pipeline 23 and a second bypass valve 24 are arranged between the inlet and the outlet of the last restrictor 8, the effect of the throttling bypass pipeline is the same as that of the second bypass pipeline 14 and the first bypass valve 15 of the sub-restrictor, one more branch can be provided for the throttling pipeline, and different branches are used for processing in different situations.
The sub-evaporator 13, the last evaporator 9 and the condenser 2 are all provided with the fans 26, so that heat dissipation of the sub-evaporator 13, the last evaporator 9 and the condenser 2 can be accelerated, load and power consumption of the compressor 1 can be reduced, and energy consumption of a system can be reduced.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (9)
1. A circulating refrigeration system is characterized by comprising a compressor, a condenser and a refrigeration area, wherein a first bypass pipeline is further arranged between an exhaust port and an air return port of the compressor, a three-way valve is arranged on one side, close to the compressor, of the first bypass pipeline, one end of the condenser is connected with the exhaust port of the compressor, the other end of the condenser is connected to the refrigeration area, and a final throttle and a final evaporator are arranged between the refrigeration area and the compressor;
the refrigeration area comprises a plurality of stages of refrigerators, each stage of refrigerator comprises a gas-liquid separator, a sub-throttling device and a sub-evaporator which are sequentially arranged, a second bypass pipeline is arranged between an inlet and an outlet of the sub-throttling device, and a first bypass valve is arranged on the second bypass pipeline;
the refrigeration district with be provided with first heat exchanger between the compressor, the compressor with be provided with the second heat exchanger between the condenser, first heat exchanger with be provided with middle heat transfer device between the second heat exchanger, middle heat transfer device is including the third heat exchanger that is close to first heat exchanger and the fourth heat exchanger that is close to the second heat exchanger, the third heat exchanger with be provided with the connecting pipe between the fourth heat exchanger.
2. The circulating refrigeration system of claim 1 wherein an accumulator is disposed between the condenser and the refrigeration zone.
3. The circulating refrigeration system according to claim 1 wherein an oil separator is disposed between the compressor and the condenser.
4. The circulating refrigeration system of claim 1 wherein a throttled bypass line and a second bypass valve are provided between the inlet and the outlet of the final throttle.
5. The circulating refrigeration system according to claim 1, wherein the connecting pipe is provided with a hydraulic pump, and a heat-insulating pipe is sleeved outside the pipeline.
6. The circulating refrigeration system according to claim 1, wherein a flow direction of the refrigerant in the third heat exchanger is the same as a flow direction of the refrigerant in the first heat exchanger, and a flow direction of the refrigerant in the fourth heat exchanger is the same as a flow direction of the refrigerant in the second heat exchanger.
7. The circulating refrigeration system according to claim 1, wherein the sub-evaporator, the final evaporator and the condenser are provided with fans.
8. The cyclic refrigeration system according to claim 1, wherein a regenerator is disposed between adjacent refrigerators, a hot flow channel of the regenerator is connected between adjacent gas-liquid separators, and a cold flow channel of the regenerator is connected between adjacent sub-evaporators.
9. The circulating refrigeration system of claim 1 wherein a check valve is provided at the discharge port of the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021815878.8U CN212902076U (en) | 2020-08-27 | 2020-08-27 | Circulating refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021815878.8U CN212902076U (en) | 2020-08-27 | 2020-08-27 | Circulating refrigerating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212902076U true CN212902076U (en) | 2021-04-06 |
Family
ID=75250682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021815878.8U Expired - Fee Related CN212902076U (en) | 2020-08-27 | 2020-08-27 | Circulating refrigerating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212902076U (en) |
-
2020
- 2020-08-27 CN CN202021815878.8U patent/CN212902076U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210406 |