CN112944704A - Refrigeration system with cooling device and control method - Google Patents
Refrigeration system with cooling device and control method Download PDFInfo
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- CN112944704A CN112944704A CN201911260797.8A CN201911260797A CN112944704A CN 112944704 A CN112944704 A CN 112944704A CN 201911260797 A CN201911260797 A CN 201911260797A CN 112944704 A CN112944704 A CN 112944704A
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- compressor
- refrigerant
- volute
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
Abstract
The invention discloses a refrigeration system with a cooling device and a control method, wherein the refrigeration system comprises: a first refrigerant compression cycle including a first compressor including a volute to exhaust; and the second refrigerant compression cycle comprises an evaporator part and a condenser part, the evaporator part is arranged on the volute, and the condenser part is arranged on the air suction pipe of the first compressor. According to the refrigerating system, the second refrigerant compression cycle is added, the evaporator part of the second refrigerant compression cycle is arranged on the volute, and the condenser part is arranged on the air suction pipe of the first compressor, so that exhaust, temperature reduction and air suction heating of the first compressor can be simultaneously performed, the problem of overhigh temperature of the shell is avoided, impact of water drops on the impeller is eliminated, and the safety and safe operation period of the unit are increased.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a refrigeration system with a cooling device and a control method.
Background
A Mechanical Vapor Recompression (MVR) system is a vapor heat pump system, and the principle thereof is to compress low-temperature and low-pressure vapor by a Mechanical compressor, so as to increase the temperature, pressure and specific enthalpy of the vapor, condense and release the heat in a condenser, and use the heat as a high-grade heat source. The latent heat of water is large, so that the method is particularly suitable for occasions with high evaporation temperature. However, in actual industrial production, the system application is restricted by the water vapor compressor technology which is the core of the heat pump system, namely the system is limited by the exhaust temperature and cannot realize high pressure ratio, namely high saturation temperature rise, so that the industrial application is more water vapor compressors with low pressure ratio and large flow.
The exhaust temperature of the water vapor compressor is generally higher and is more than 100 ℃, if the high pressure ratio is realized, the exhaust temperature can be further increased even to more than 200 ℃, and the exhaust superheat degree is very high, so that the problem that the high pressure ratio saturation temperature rise is realized by reducing the exhaust temperature is urgently needed to be solved by the industry at present.
At present, in the industry, the exhaust temperature can be reduced to a certain extent by mainly cooling through water spraying, inlet water spraying and outlet water spraying, the reduction is limited, the effect is still not ideal, the inlet water spraying is cooled, and because a centrifugal compressor is sensitive to wet compression, a large amount of water spraying can cause liquid impact on an impeller and affect the reliability, the water spraying is strictly controlled, and the inlet is guaranteed to be gas. Although the outlet water spray reduces the exhaust temperature entering the condenser, the gas temperature in the volute is still high, on one hand, the mechanical safety problem caused by overhigh shell temperature is brought, and on the other hand, the flow loss is increased or the volume of the compressor is increased due to the increase of the flow speed in the volute.
Disclosure of Invention
The invention discloses a refrigeration system with a cooling device and a control method, and solves the problems that the exhaust temperature is high and liquid impact is easily caused to an impeller.
According to one aspect of the present invention, there is disclosed a refrigeration system comprising: a first refrigerant compression cycle including a first compressor including a volute to exhaust; and the second refrigerant compression cycle comprises an evaporator part and a condenser part, the evaporator part is arranged on the volute, and the condenser part is arranged on the air suction pipe of the first compressor.
Furthermore, the evaporator part comprises a cooling jacket, and a pipeline for circulating a refrigerant is enclosed between the cooling jacket and the outer wall of the volute.
Furthermore, the cooling jacket is provided with a refrigerant inlet and a refrigerant outlet, the refrigerant inlet is close to the exhaust port of the volute, and the refrigerant outlet is far away from the exhaust port of the volute.
Further, the flow direction of the refrigerant in the cooling jacket is opposite to the rotation direction of the impeller in the volute.
Further, the cooling jacket extends along an outer periphery of the volute.
Furthermore, reinforcing ribs are arranged on the cooling sleeve and are connected with the cooling sleeve and the volute.
Further, the condenser part comprises a sleeve, the air suction pipe of the first compressor is arranged in the sleeve in a penetrating mode, and a pipeline for circulating a refrigerant is formed between the sleeve and the air suction pipe of the first compressor.
Further, a throttling device is arranged on a pipeline between the evaporator part and the condenser part.
Further, the refrigeration system is a refrigeration system, and the first compressor is a water vapor compressor.
According to a second aspect of the present invention, there is disclosed a control method for controlling the above refrigeration system, the second refrigerant compression cycle further comprising a throttling device provided in a pipe between the evaporator section and the condenser section, the control method comprising the steps of: step S10: acquiring a discharge superheat degree D1 of a first compressor and acquiring a preset superheat degree D2; step S20: and controlling the opening degree of the throttling device according to the relation between the exhaust superheat degree D1 and the preset superheat degree D2.
Further, the step S20 further includes: step S21: and if D1 is larger than D2, controlling the throttle device to increase the opening degree.
Further, a liquid viewing mirror for observing exhaust gas is further arranged at the position of the exhaust port of the first compressor, and the control method further comprises the following steps: step S30: observing a discharge state of the first compressor; step S40: and controlling the opening degree of the throttling device according to the exhaust state of the first compressor.
Further, the step S40 further includes: step S41: and controlling the throttling device to reduce the opening degree if the liquid drops are observed in the exhaust gas of the first compressor.
According to a third aspect of the present invention, a control method for the above refrigeration system is disclosed, wherein the second refrigerant compression cycle further comprises a throttling device disposed on a pipeline between the evaporator portion and the condenser portion, the control method comprising the steps of: step S10: acquiring a suction superheat degree D3 of a first compressor and acquiring a preset superheat degree D2; step S20: and controlling the opening degree of the throttling device according to the relation between the suction superheat degree D1 and the preset superheat degree D2.
Further, the step S20 further includes: step S21: and if D3 is larger than D2, controlling the throttle device to increase the opening degree.
According to the refrigeration system, the second refrigerant compression cycle is added, the evaporator part of the second refrigerant compression cycle is arranged on the volute, and the condenser part is arranged on the air suction pipe of the first compressor, so that exhaust gas with high superheat degree in the first compressor can be cooled through the evaporator part, the exhaust gas reaches a saturated state, the problem of overhigh shell temperature caused by overhigh exhaust temperature is avoided, meanwhile, the suction gas of the first compressor is heated through the condenser part, liquid drops are gasified into steam, the impact of water drops on an impeller is eliminated, and the safety and the safe operation period of a unit are increased.
Drawings
FIG. 1 is a schematic diagram of a refrigeration system according to an embodiment of the present invention;
FIG. 2 is a perspective view of a volute of an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a volute of an embodiment of the present invention;
legend: 1. a first refrigerant compression cycle; 10. a volute; 11. an exhaust port; 2. a second refrigerant compression cycle; 20. an evaporator section; 21. a cooling jacket; 211. a refrigerant inlet; 212. a refrigerant outlet; 22. reinforcing ribs; 30. a second compressor; 40. a throttling device; 50. a condenser section.
Detailed Description
The present invention is further illustrated by the following examples, but is not limited to the details of the description.
As shown in fig. 1, the present invention discloses a refrigerating system comprising: the air conditioner comprises a first refrigerant compression cycle 1 and a second refrigerant compression cycle 2, wherein the first refrigerant compression cycle 1 comprises a first compressor, and the first compressor comprises a volute 10 for exhausting; the second refrigerant compression cycle 2 includes an evaporator portion 20 and a condenser portion 50, the evaporator portion 20 being disposed on the scroll case 10, and the condenser portion 50 being disposed on the suction pipe of the first compressor. According to the refrigeration system, the second refrigerant compression cycle 2 is added, the evaporator part 20 of the second refrigerant compression cycle is arranged on the volute 10, and the condenser part 50 is arranged on the air suction pipe of the first compressor, so that exhaust gas with high superheat degree in the first compressor can be cooled through the evaporator part 20, the exhaust gas reaches a saturated state, the problem of overhigh shell temperature caused by overhigh exhaust temperature is avoided, meanwhile, the suction gas of the first compressor is heated through the condenser part 50, liquid drops are gasified into steam, the impact of water drops on an impeller is eliminated, and the safety and the safe operation period of a unit are increased.
As shown in fig. 2 and 3, in the above embodiment, the evaporator portion 20 includes the cooling jacket 21, and a pipeline for circulating the refrigerant is enclosed between the cooling jacket 21 and the outer wall of the scroll casing 10. According to the refrigeration system, the cooling sleeve 21 is arranged on the outer wall of the volute 10, so that a pipeline for circulating a refrigerant is formed between the cooling sleeve 21 and the outer wall of the volute 10 in a surrounding manner, the volute 10 can be cooled through the refrigerant in the second refrigerant compression cycle 2, the exhaust temperature of the first compressor is further reduced, and the problems of overhigh shell temperature, increased flow loss, overlarge condenser volume, overhigh initial investment and the like caused by overhigh exhaust temperature are solved.
In the above embodiment, the cooling jacket 21 has the refrigerant inlet 211 and the refrigerant outlet 212, the refrigerant inlet 211 is disposed near the exhaust port 11 of the scroll casing 10, and the refrigerant outlet 212 is disposed far from the exhaust port 11 of the scroll casing 10. In the refrigeration system, the refrigerant inlet 211 is arranged at the position close to the exhaust port 11 of the volute 10, and the refrigerant outlet 212 is arranged at the position far away from the exhaust port 11 of the volute 10, so that the exhaust flow direction is opposite to the refrigerant flow direction in the cooling jacket 21, a counter flow is formed, the heat exchange temperature difference is increased, and the heat exchange effect is improved.
In the above embodiment, the flow direction of the refrigerant in the cooling jacket 21 is opposite to the rotation direction of the impeller in the scroll casing 10. In the refrigeration system of the invention, the flow direction of the refrigerant in the cooling jacket 21 is set to be opposite to the rotation direction of the impeller in the volute 10, and because the volume flow of different sections in the volute 10 is different, taking a water vapor compressor as an example, the volume flow of water vapor is in direct proportion to a position angle, the larger the volume flow is, the larger the required heat exchange amount is, the smaller the volume flow is, the smaller the required heat exchange amount is, the larger the section is, the farther the section is, the smaller the volume flow is, the smaller the required heat exchange amount is, so the rotation direction of the refrigerant in the cooling jacket 21 is opposite to the rotation direction of the impeller, namely the flow direction of the water vapor is opposite, thereby the heat exchange temperature difference is increased, and the heat exchange effect is improved.
In the above embodiment, the cooling jacket 21 is provided extending along the outer periphery of the scroll casing 10. The cooling jacket 21 is provided with a reinforcing rib 22, and the reinforcing rib 22 connects the cooling jacket 21 and the volute 10. The refrigerating system of the invention can improve the integral strength of the volute 10 and the reliability of use by arranging the reinforcing ribs 22.
In the above embodiment, the condenser portion 50 includes a sleeve, the suction pipe of the first compressor is inserted into the sleeve, and a pipeline for circulating the refrigerant is formed between the sleeve and the suction pipe of the first compressor. According to the refrigeration system, the sleeve is arranged, so that a refrigerant can flow between the sleeve and the suction pipe of the first compressor, water vapor liquid drops in the suction pipe are heated, the liquid drops are evaporated, impact of the liquid drops on the impeller is eliminated, and the safety and the safe operation period of the unit are increased.
In the above embodiment, the throttle device 40 is provided on the line between the evaporator portion 20 and the condenser portion 50.
In the above embodiment, the refrigeration system is a refrigeration system, and the first compressor is a water vapor compressor.
According to a second aspect of the present invention, there is disclosed a control method for controlling the above-described refrigeration system, the second refrigerant compression cycle 2 further comprising a throttling device 40, the throttling device 40 being disposed on a pipe between the evaporator portion 20 and the condenser portion 50, the control method comprising the steps of:
step S10: acquiring a discharge superheat degree D1 of the first compressor and acquiring a preset superheat degree D2 of the first compressor;
step S20: the opening degree of the throttle device 40 is controlled based on the relationship between the exhaust superheat degree D1 and the preset superheat degree D2.
In the above embodiment, step S20 further includes:
step S21: if D1 > D2, the throttle device 40 is controlled to increase the opening degree.
In the above embodiment, a liquid viewing mirror for observing the exhaust gas is further disposed at the exhaust port of the first compressor, and the control method further includes the steps of:
step S30: observing a discharge state of the first compressor;
step S40: the opening degree of the throttle device 40 is controlled according to the discharge state of the first compressor.
In the above embodiment, step S40 further includes:
step S41: if the presence of liquid droplets in the exhaust gas of the first compressor is observed, the throttle device 40 is controlled to decrease the opening degree.
According to the refrigeration system, the opening degree of the throttling device 40 is adjusted according to the monitored exhaust superheat degree and the exhaust state of the first compressor, if the exhaust superheat degree is high, the opening degree of the throttling device 40 can be increased, the flow is increased, if liquid drops exist in the exhaust gas, the opening degree of the throttling device 40 needs to be reduced, the flow is reduced, heat exchange is weakened, and the exhaust gas is guaranteed to be saturated gas.
According to a third aspect of the present invention, a control method for controlling the above refrigeration system is disclosed, wherein the second refrigerant compression cycle 2 further comprises a throttling device 40, the throttling device 40 is arranged on a pipeline between the evaporator part 20 and the condenser part 50, and the control method comprises the following steps:
step S10: acquiring a suction superheat degree D3 of the first compressor and acquiring a preset superheat degree D2 of the first compressor;
step S20: the opening degree of the throttle device 40 is controlled based on the relationship between the degree of superheat D1 of the intake air and the preset degree of superheat D2.
In the above embodiment, step S20 further includes:
step S21: if D3 > D2, the throttle device 40 is controlled to increase the opening degree.
According to the refrigeration system, the opening degree of the throttling device 40 is adjusted according to the monitored suction superheat degree and the exhaust state of the first compressor, if the suction superheat degree is high, the opening degree of the throttling device 40 can be increased, the flow is increased, if liquid drops exist in the exhaust gas seen through the liquid mirror, the opening degree of the throttling device 40 needs to be reduced, the flow is reduced, heat exchange is weakened, and the exhaust gas is guaranteed to be saturated gas.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes and modifications which are obvious to the technical scheme of the invention are covered by the protection scope of the invention.
Claims (15)
1. A refrigeration system, comprising:
a first refrigerant compression cycle (1), the first refrigerant compression cycle (1) comprising a first compressor comprising a volute (10) for exhausting;
a second refrigerant compression cycle (2), the second refrigerant compression cycle (2) including an evaporator portion (20) and a condenser portion (50), the evaporator portion (20) being disposed on the scroll (10), the condenser portion (50) being disposed on the suction pipe of the first compressor.
2. The refrigerant system as set forth in claim 1,
the evaporator part (20) comprises a cooling jacket (21), and a pipeline for circulating a refrigerant is enclosed between the cooling jacket (21) and the outer wall of the volute (10).
3. The refrigerant system as set forth in claim 2,
the cooling jacket (21) is provided with a refrigerant inlet (211) and a refrigerant outlet (212), the refrigerant inlet (211) is close to the exhaust port (11) of the volute (10), and the refrigerant outlet (212) is far away from the exhaust port (11) of the volute (10).
4. The refrigerant system as set forth in claim 3,
the flow direction of the refrigerant in the cooling jacket (21) is opposite to the rotation direction of the impeller in the volute (10).
5. The refrigerant system as set forth in claim 2,
the cooling jacket (21) extends along the periphery of the volute (10).
6. The refrigerant system as set forth in claim 2,
the cooling jacket (21) is provided with a reinforcing rib (22), and the reinforcing rib (22) is connected with the cooling jacket (21) and the volute (10).
7. The refrigerant system as set forth in claim 1,
the condenser part (50) comprises a sleeve, the air suction pipe of the first compressor is arranged in the sleeve in a penetrating mode, and a pipeline for circulating a refrigerant is formed between the sleeve and the air suction pipe of the first compressor.
8. The refrigerant system as set forth in claim 1,
a throttling device (40) is arranged on the pipeline between the evaporator part (20) and the condenser part (50).
9. The refrigerant system as set forth in claim 1,
the refrigeration system is a refrigeration system, and the first compressor is a water vapor compressor.
10. A control method for controlling a refrigeration system according to any one of claims 1 to 9, wherein the second refrigerant compression cycle (2) further comprises a throttling device (40), the throttling device (40) being provided on a line between the evaporator portion (20) and the condenser portion (50), the control method comprising the steps of:
step S10: acquiring a discharge superheat degree D1 of a first compressor and acquiring a preset superheat degree D2;
step S20: and controlling the opening degree of the throttling device (40) according to the relation between the exhaust superheat degree D1 and the preset superheat degree D2.
11. The control method according to claim 10, wherein the step S20 further includes:
step S21: and if D1 is larger than D2, controlling the throttle device (40) to increase the opening degree.
12. The control method according to claim 10, wherein a liquid sight glass for observing exhaust gas is further provided at the first compressor exhaust port position, the control method further comprising the steps of:
step S30: observing a discharge state of the first compressor;
step S40: controlling the opening of the throttling means (40) according to the discharge condition of the first compressor.
13. The control method according to claim 12, wherein the step S40 further includes:
step S41: -controlling the throttling means (40) to decrease the opening if the presence of liquid droplets in the exhaust gas of the first compressor is observed.
14. A control method for controlling a refrigeration system according to any one of claims 1 to 9, wherein the second refrigerant compression cycle (2) further comprises a throttling device (40), the throttling device (40) being provided on a line between the evaporator portion (20) and the condenser portion (50), the control method comprising the steps of:
step S10: acquiring a suction superheat degree D3 of a first compressor and acquiring a preset superheat degree D2;
step S20: and controlling the opening degree of the throttling device (40) according to the relation between the suction superheat degree D1 and the preset superheat degree D2.
15. The control method according to claim 14, wherein the step S20 further includes:
step S21: and if D3 is larger than D2, controlling the throttle device (40) to increase the opening degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911260797.8A CN112944704A (en) | 2019-12-10 | 2019-12-10 | Refrigeration system with cooling device and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911260797.8A CN112944704A (en) | 2019-12-10 | 2019-12-10 | Refrigeration system with cooling device and control method |
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| CN112944704A true CN112944704A (en) | 2021-06-11 |
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| CN201911260797.8A Withdrawn CN112944704A (en) | 2019-12-10 | 2019-12-10 | Refrigeration system with cooling device and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115822988A (en) * | 2023-02-14 | 2023-03-21 | 浙江镕达永能压缩机有限公司 | Centrifugal compressor and inlet temperature control method of centrifugal compressor |
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| CN105241115A (en) * | 2015-09-22 | 2016-01-13 | 东南大学 | Steam compressing-jet coupling refrigeration circulating device and method |
| CN106849467A (en) * | 2016-12-30 | 2017-06-13 | 山东空能磁悬浮技术有限公司 | A kind of refrigerant compression machine equipment cooling structure |
| CN107702378A (en) * | 2017-10-12 | 2018-02-16 | 陈则韶 | The two kinds of application modes and its system of steam heat pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115822988A (en) * | 2023-02-14 | 2023-03-21 | 浙江镕达永能压缩机有限公司 | Centrifugal compressor and inlet temperature control method of centrifugal compressor |
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