CN104807243B - A kind of refrigerating plant - Google Patents
A kind of refrigerating plant Download PDFInfo
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- CN104807243B CN104807243B CN201510250325.XA CN201510250325A CN104807243B CN 104807243 B CN104807243 B CN 104807243B CN 201510250325 A CN201510250325 A CN 201510250325A CN 104807243 B CN104807243 B CN 104807243B
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- Prior art keywords
- refrigerant
- gas separator
- interface
- cooling
- refrigeration
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Classifications
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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
- F25B41/00—Fluid-circulation arrangements
-
- 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
- F25B2500/06—Damage
-
- 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
- F25B2500/31—Low ambient temperatures
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
The invention discloses a kind of refrigerating plant, include refrigeration compressor, condenser, gas separator, refrigerant circulation pump and at least one phase transformation sweat cooling end, the discharge refrigerant mouth of refrigeration compressor first is entered incoming interface and is sequentially connected by refrigerant line and condenser, gas separator, and the first discharge interface of gas separator is connected with the refrigerant suction mouth of refrigeration compressor by refrigerant tubing；Second discharge interface of gas separator is connected by refrigerant tubing with the inhalation interface of refrigerant circulation pump, the outlet of refrigerant circulation pump is connected by refrigerant tubing with the incoming interface that enters of the phase transformation sweat cooling end, and the discharge interface of phase transformation sweat cooling end is entered incoming interface with the second of gas separator by refrigeration piping and is connected.The present invention can reduce power consumption, reduce operating cost.
Description
Technical field
The present invention relates to refrigeration plant, more particularly to a kind of refrigeration with compressor cooling and free cooling refrigeration function
Device.
Background technology
Many oil, chemical industry, food production, precision instrument and electronic device manufacturing process, and high-performance computer, clothes
The data processing equipments such as business device, it is required for providing year round cooling service, with required for heat caused by neutralisation process, or offer
Conditions warrant.
Among all kinds equipment that refrigerant service is provided for use above, there is two kinds of refrigerating plant, it is a kind of
It is handpiece Water Chilling Units device, steam compression cycle refrigeration first inhales chilled water cooling down to required temperature, then by chilled water
Receive the heat of load.This use is typically characterised by with secondary cycle, i.e. one cycle is the vapour pressure contraction of refrigerant
SAPMAC method, and to be then chilled water absorbed heat secondary cycle in the load and the heat transfer cycle of heat release is circulated to primary side.
Another type of refrigerating plant is called direct evaporation-refrigeration device, i.e. refrigeration system only passes through primary side refrigerant
Vapor-compression refrigerant cycle, without again by secondary cycle, heat of the refrigerant in the direct absorbing load of evaporator.Due to
The equipment of direct evaporation type does not have secondary heat exchange, and without the loss in efficiency of secondary heat exchange, therefore, under equal conditions refrigeration is imitated
Rate is higher.
The refrigerating plant of many directly evaporation types, due to the working characteristics of refrigeration compressor, the lubricating oil meeting of compressor
As refrigerant enters the circulatory system, for this reason, it may be necessary to prevent this parts of lubricating oil is detained from can not return to compressor in systems, with
Avoid refrigeration compressor from being burnt because lubricating oil is lacked, so limit in same refrigerant vapor compression kind of refrigeration cycle
It is interior, the ability of the end evaporator of multiple identical or different sizes is installed in different places to use.Further, since refrigerant pipe
Road drag losses can influence the performance of refrigeration compressor, in some instances it may even be possible to can influence the reliability of compressor, therefore, directly evaporation is made
The end evaporator of device for cooling typically can not also be installed away from refrigeration compressor.In the application of year round cooling, some areas exist
Under winter environment, environment temperature is lower than the temperature of load for needing to cool down, material is thus formed the environment using low temperature come
The condition cooled down to load, here it is free cooling refrigeration.Natural cooling is due to can partly substitute or substitute completely
Refrigerant vapor compression cycle is freezed, therefore greatly reduces year round cooling power consumption, reduces operating cost.
At present, also without the phase transformation evaporation-refrigeration device with compressor cooling and free cooling refrigeration function.
The content of the invention
The present invention be directed to the shortcomings of the prior art, there is provided one kind carries compressor cooling and free cooling refrigeration work(
The phase transformation evaporation-refrigeration device of energy, power consumption is reduced, reduce operating cost.
In order to solve the above technical problems, the present invention proposes a kind of refrigerating plant, include refrigeration compressor, condenser,
Gas separator, refrigerant circulation pump and at least one phase transformation sweat cooling end, the discharge refrigerant mouth of refrigeration compressor
First enter incoming interface by refrigerant line and condenser, gas separator and be sequentially connected, the first discharge of gas separator
Interface is connected with the refrigerant suction mouth of refrigeration compressor by refrigerant tubing；
The inhalation interface phase that second discharge interface of the gas separator passes through refrigerant tubing and refrigerant circulation pump
Even, the outlet of refrigerant circulation pump is connected by refrigerant tubing with the incoming interface that enters of the phase transformation sweat cooling end, phase
The discharge interface of change sweat cooling end is entered incoming interface with the second of gas separator by refrigeration piping and is connected.
Further, the refrigerant line between the condenser and gas separator is provided with magnetic valve.
Further, the refrigerant line between the condenser and gas separator is provided with choke valve.
Further, in addition to refrigerant reversing valves and natural cooling device, the discharge interface of phase transformation sweat cooling end are led to
Cross refrigeration piping with the incoming interface that enters of refrigerant reversing valves to be connected, the first discharge interface of refrigerant reversing valves crosses refrigerant tubing
Enter incoming interface with the second of gas separator to be connected, the second discharge interface of refrigerant reversing valves passes through refrigerant tubing and nature
Cooler and and the inlet port of gas separator be connected.
Further, the natural cooling device is used to carry out heat exchange transmission with second cooling body, described second
Cooling body is air or fluid media (medium).
Further, the condenser is used to carry out heat exchange transmission, the first described cooling with the first cooling body
Body can be air or fluid media (medium).
Further, described the first cooling body and second of cooling body are same fluid or different types of stream
Body.
Further, the phase transformation sweat cooling end is used to carry out heat exchange biography with solid or the third cooling body
Pass, the third described cooling body is air or fluid media (medium).
Further, refrigeration compressor is magnetic suspension oilless (oil free) compressor.
Above-mentioned technical proposal at least has the advantages that：
1. compared with the type of cooling of existing handpiece Water Chilling Units device, the present invention is defeated by refrigerant in a manner of one cycle
Phase transformation sweat cooling end is sent to loading direct cooling down, without needing secondary heat exchange to follow as handpiece Water Chilling Units
Ring, first chilled water refrigeration cool-down is cooled down, then chilled water is again to loading cooling down, and therefore, refrigerating efficiency obtains very big
Improve.
2. compared with existing directly evaporation-refrigeration device, the present invention will be to load cooling contribution not by gas separator
Big gas refrigerant is separated, and is not transported in phase transformation sweat cooling end, the system into phase transformation sweat cooling end
Cryogen is entirely liquid refrigerant, therefore can improve the heat exchange efficiency in phase transformation sweat cooling end and reduce conveying work(
Rate, meanwhile, it is defeated by the conveying refrigerant of refrigerated medium pump, rather than by compressor present invention comprises a refrigerated medium pump
Send, therefore fed distance can be greatly increased, you can with the place installation phase transformation sweat cooling end away from compressor.
3. compared with prior art, make in the refrigerant and refrigeration compressor used in natural cooling device of the invention
Refrigerant is identical, rather than water used by most of natural cooling at present, therefore, even in very cold place,
Also there is no concern that sharp freezing occurs, use range greatly expands.
4. in the present invention, refrigeration compressor can use magnetic suspension oilless (oil free) compressor, the circulation of refrigerant does not have completely
Lubricating oil, it is therefore, completely the same not necessarily like existing technology, worry whether lubricating oil smoothly can be returned in refrigeration compressor,
Refrigeration compressor is avoided to be burnt because of oil starvation.
Brief description of the drawings
Fig. 1 is the theory diagram of refrigerating plant first embodiment of the present invention.
Fig. 2 is the theory diagram of refrigerating plant second embodiment of the present invention.
Fig. 3 is the theory diagram of refrigerating plant 3rd embodiment of the present invention.
Fig. 4 is the theory diagram of refrigerating plant fourth embodiment of the present invention.
Fig. 5 is the structure principle chart of refrigerating plant of the present invention.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.The present invention is described further below in conjunction with the accompanying drawings.
As shown in figure 1, the refrigerating plant of first embodiment of the invention includes refrigeration compressor 1, condenser 2, choke valve
4th, gas separator 5, refrigerant circulation pump 6 and at least one phase transformation sweat cooling end 9 etc..Characterized in that, refrigeration pressure
The discharge refrigerant mouth 11 of contracting machine 1 first enters incoming interface 52 successively by refrigerant line and condenser 2, gas separator 5
It is connected, the first discharge interface 51 and the refrigerant suction mouth 12 of refrigeration compressor 1 of gas separator 5 pass through refrigerant tubing phase
Even；
Second discharge interface 53 of the gas separator 5 is connect by the suction of refrigerant tubing and refrigerant circulation pump 6
Mouth 61 is connected, and the outlet 62 of refrigerant circulation pump 6 is connect by refrigerant tubing and the entrance of the phase transformation sweat cooling end 9
Mouth 91 is connected, and the discharge interface 92 of phase transformation sweat cooling end 9 enters incoming interface by the second of refrigeration piping and gas separator 5
54 are connected.
As shown in Fig. 2 the difference of the refrigerating plant of second embodiment of the invention, the present embodiment and first embodiment exists
In the refrigerant line between the condenser 2 and gas separator 5 is provided with magnetic valve 3.
As shown in figure 3, the difference of the refrigerating plant of third embodiment of the invention, the present embodiment and second embodiment exists
In the refrigerant line between the condenser 2 and gas separator 5 is provided with choke valve 4.
As shown in figure 4, the difference of the refrigerating plant of fourth embodiment of the invention, the present embodiment and 3rd embodiment exists
In, in addition to refrigerant reversing valves 7, natural cooling device 8, the discharge interface 92 of phase transformation sweat cooling end 9 pass through refrigeration piping
Be connected with the incoming interface 71 that enters of refrigerant reversing valves 7, the first discharge interface 72 of refrigerant reversing valves 7 by refrigerant tubing with
The second of gas separator 5 enters incoming interface 54 and is connected, the second discharge interface 73 of refrigerant reversing valves 7 by refrigerant tubing with
Natural cooling device 8 and and gas separator 5 inlet port 54 be connected.
As shown in figure 5, shown in Fig. 5 be it is a kind of can typically use the refrigerating plant that be cooled down of natural energy, be a kind of
Split type structure, wherein, compressor 1, condenser 2, magnetic valve 3, choke valve 4, gas separator 5, refrigerant circulation pump 6,
Refrigerant reversing valves 7, natural cooling device 8 are arranged in same framework, turn into a main frame.Each phase transformation sweat cooling end
End 9 is arranged in its independent framework.Liquid refrigerant pipeline is used between main frame and each phase transformation sweat cooling end respectively
100 and gas refrigerant pipeline 200 connect.
Condenser 2 and natural cooling device 8 are all a kind of finned coil heat exchangers being made up of copper pipe and fin, wherein freezing
Agent is in copper Bottomhole pressure.The first cooling body and second of cooling body are all air.Cooling blower 10 drives ambient air
Flowed between the fin on the outside of copper pipe, the heat of refrigerant passes to air in this way, and refrigerant is condensed into as liquid
Body.
For compressor 1 using the magnetic suspension compressor of non lubricant oil, refrigerant is refrigerant as R134a or other species.
The operational mode of package unit is divided into complete compressor cooling, compressor cooling adds free cooling refrigeration, completely certainly
So three kinds of mode of operations of cooling refrigeration.
The condition of work of complete compressor cooling mode of operation is that environment temperature is more than or equal to slave phase change sweat cooling end
The refrigerant temperature that end discharge interface ejects.Now, refrigerant reversing valves enter the discharge interface 72 of incoming interface 71 and first it
Between passage open, enter passage between the discharge interface 73 of incoming interface 71 and second and close.The side that refrigeration compressor 1 passes through compression
Formula, refrigerant compression is turned into the gaseous state of HTHP, entered by refrigeration piping among condenser 2, HTHP
Gaseous state refrigerant in condenser 2, transferred heat in air, the condensation of the gas refrigerant of HTHP turns into
Highly pressurised liquid state.The refrigerant of highly pressurised liquid state enters magnetic valve 3 and choke valve 4, the liquid of high pressure by refrigerant tubing
Cryogen throttling expansion turns into the gas and liquid mixture of low-temp low-pressure, the gas liquid admixture of this part low pressure
Refrigerant enters gas separator 54, in gas separator 54, gas and liquid portion in refrigerant by refrigeration piping
It is separated, wherein gas part is discharged from the first discharge interface 51 of gas separator 54, by refrigeration piping, from compression mechanism
Cryogen air entry 12 comes back among compressor and is compressed by the compressor.And the liquid refrigerant in gas separator 54 then enters
Refrigerant circulation pump 6 enters incoming interface 61, after refrigerant circulation pump 6 pressurizes this liquid refrigerant, by refrigeration piping, enters
Enter in 1 or more phase transformation sweat cooling ends 9, the refrigerant of liquid condition absorbs cold in phase transformation sweat cooling end 9
But the heat of object, evaporation turn into gaseous state refrigerant, and slave phase becomes the discharge interface of sweat cooling end 9, passes through refrigerator pipes
Road, the passage between the discharge interface 72 of inlet port 71 and first of refrigerant reversing valves 7, is returned among gas separator 54.
In gas separator 54, this some refrigerant gas and it is foregoing by throttling expansion and the system that produces and separate
Refrigerant gas, together by refrigeration piping, into the air entry 12 of compressor, re-compressed by compressor, refrigerant is like this
Go round and begin again circulation, the process freezed.
Compressor cooling adds the condition of free cooling refrigeration mode of operation to be, environment temperature is less than slave phase and becomes sweat cooling end
The refrigerant temperature for holding 9 discharge interfaces to eject.Now, refrigerant reversing valves 7 enter the discharge interface 72 of incoming interface 71 and first
Between passage close, enter passage between the discharge interface 72 of incoming interface 71 and second and open.Refrigeration compressor 1 passes through compression
Mode, refrigerant compression is turned into the gaseous state of HTHP, entered by refrigeration piping among condenser 2, high temperature is high
The gaseous state refrigerant of pressure within the condenser, has been transferred heat among air, the gas refrigerant condensation of HTHP
As highly pressurised liquid state.The refrigerant of highly pressurised liquid state enters magnetic valve 3 and choke valve 4, high pressure by refrigerant tubing
Liquid refrigerant throttling expansion turn into low-temp low-pressure gas and liquid mixture, the gas liquid mixing shape of this part low pressure
The refrigerant of state enters gas separator 54, in gas separator 54, gas and liquid in refrigerant by refrigeration piping
Part is separated, and wherein gas part is discharged from the first discharge interface 51 of gas separator 54, by refrigeration piping, from compression
The refrigerant suction mouth 12 of machine 1, which is come back among compressor, to be compressed by the compressor.And the liquid refrigerant in gas separator 54
Then enter incoming interface 61 into refrigerant circulation pump 6, after refrigerant circulation pump pressurizes this liquid refrigerant, pass through refrigerator pipes
Road, into 1 or more phase transformation sweat cooling ends 9, the refrigerant of liquid condition absorbs quilt in phase transformation sweat cooling end 9
The heat of object is cooled down, evaporation turns into gaseous state refrigerant, and slave phase becomes the discharge interface of sweat cooling end, passes through refrigerator pipes
Road, the passage entered from refrigerant reversing valves 7 between the discharge interface 73 of incoming interface 71 and second, enters natural cooling heat exchange device 8
In.Now, because the temperature of air is less than the gas refrigerant temperature entered, therefore, the heat of a part of gas refrigerant turns
Have been moved among air, be condensed into liquid, together with the gas refrigerant not being condensed, by refrigeration piping, from gas
The second of separator 54 enters incoming interface 54 and returned among gas separator 54.In gas separator 54, have become liquid
The refrigerant of state has been stayed in gas separator 54, and other liquid refrigerants are transported to by refrigerant circulation pump 7 again together
Phase transformation sweat cooling end 9, and the refrigerant of gas part is then produced and isolated by throttling expansion 4 with foregoing
The refrigerant gas come, together by refrigeration piping, into the air entry 12 of compressor 1, is re-compressed, refrigerant by compressor
Go round and begin again circulation like this, the process freezed.Because a part of slave phase becomes the gas refrigeration of sweat cooling end 9 out
Agent, a part of heat is released in natural cooling heat exchange device and has become liquid, therefore compressor needs to re-compress to follow
The air-breathing of ring is reduced, i.e. the live load of compressor reduces because there is free cooling refrigeration.
The condition of complete free cooling refrigeration mode of operation is equally that environment temperature is less than the row of slave phase change sweat cooling end 9
The refrigerant temperature that outgoing interface ejects.Now, refrigerant reversing valves 7 enter between the discharge interface 72 of incoming interface 71 and first
Passage is closed, and the passage entered between the discharge interface 73 of incoming interface 71 and second is opened.When the ambient temperature is sufficiently low, slave phase infantile feverish perspiration
The gas refrigerant of hair refrigeration end discharge, total condensation turns into liquid condition in natural cooling heat exchange device 8, therefore,
No longer need compressor 1 to work completely, carry out pressure of inspiration(Pi) contraction SAPMAC method.
Described above is the embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (3)
1. a kind of refrigerating plant, include refrigeration compressor (1), condenser (2), gas separator (5), refrigerant circulation pump
(6) and at least one phase transformation sweat cooling end (9), it is characterised in that the discharge refrigerant mouth (11) of refrigeration compressor (1)
First enter incoming interface (52) by refrigerant line and condenser (2), gas separator (5) and be sequentially connected, gas separator
(5) the first discharge interface (51) is connected with the refrigerant suction mouth (12) of refrigeration compressor (1) by refrigerant tubing；
The suction that the second discharge interface (53) of the gas separator (5) passes through refrigerant tubing and refrigerant circulation pump (6)
Interface (61) is connected, and the outlet (62) of refrigerant circulation pump (6) passes through refrigerant tubing and the phase transformation sweat cooling end
(9) the incoming interface (91) that enters is connected, and the discharge interface (92) of phase transformation sweat cooling end (9) is separated by refrigeration piping with gas
The second of device (5) enters incoming interface (54) and is connected；
Refrigerant line between the condenser (2) and gas separator (5) is provided with magnetic valve (3)；
Refrigerant line between the condenser (2) and gas separator (5) is provided with choke valve (4)；
Also include refrigerant reversing valves (7) and natural cooling device (8), the discharge interface (92) of phase transformation sweat cooling end (9) is logical
Cross refrigeration piping with the incoming interface (71) that enters of refrigerant reversing valves (7) to be connected, the first discharge interface of refrigerant reversing valves (7)
(72) enter incoming interface (54) with the second of gas separator (5) by refrigerant tubing to be connected, the second of refrigerant reversing valves (7)
Discharge interface (73) by refrigerant tubing and natural cooling device (8) and and the inlet port (54) of gas separator (5) be connected；
The natural cooling device (8) is used to carry out heat exchange transmission with second of cooling body, and second of cooling body is empty
Gas or fluid media (medium)；
The condenser (2) is used to carry out heat exchange transmission with the first cooling body, and the first described cooling body can be empty
Gas or fluid media (medium)；
Described the first cooling body and second of cooling body are same fluid or different types of fluid.
2. refrigerating plant according to claim 1, it is characterised in that：The phase transformation sweat cooling end (9) is used for consolidating
Body or the third cooling body carry out heat exchange transmission, and the third described cooling body is air or fluid media (medium).
3. refrigerating plant according to claim 1, it is characterised in that：Refrigeration compressor (1) is magnetic suspension oilless (oil free) compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510250325.XA CN104807243B (en) | 2015-05-15 | 2015-05-15 | A kind of refrigerating plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510250325.XA CN104807243B (en) | 2015-05-15 | 2015-05-15 | A kind of refrigerating plant |
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| CN104807243A CN104807243A (en) | 2015-07-29 |
| CN104807243B true CN104807243B (en) | 2017-12-26 |
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| CN201510250325.XA Active CN104807243B (en) | 2015-05-15 | 2015-05-15 | A kind of refrigerating plant |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106852071A (en) * | 2016-12-28 | 2017-06-13 | 曙光节能技术（北京）股份有限公司 | For the liquid cooling apparatus of blade server |
| CN111442550A (en) * | 2020-05-15 | 2020-07-24 | 北京百度网讯科技有限公司 | Refrigeration system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5617738A (en) * | 1994-09-20 | 1997-04-08 | Saga University | Energy converter |
| CN1453528A (en) * | 2003-05-27 | 2003-11-05 | 西安交通大学 | Refrigerating method and refrigerator based on hydroscopic expanding air and absorbing lithium bromide |
| CN101936616A (en) * | 2010-08-03 | 2011-01-05 | 清华大学 | Evaporative condensate pump circulating year-round refrigeration device |
| CN101949611A (en) * | 2010-10-19 | 2011-01-19 | 河南科技大学 | Low-grade heat energy auxiliary-drive composite low-temperature refrigerating system |
| CN104390387A (en) * | 2014-11-03 | 2015-03-04 | 上海伏波环保设备有限公司 | Dual-working-medium bicirculating refrigeration system |
-
2015
- 2015-05-15 CN CN201510250325.XA patent/CN104807243B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5617738A (en) * | 1994-09-20 | 1997-04-08 | Saga University | Energy converter |
| CN1453528A (en) * | 2003-05-27 | 2003-11-05 | 西安交通大学 | Refrigerating method and refrigerator based on hydroscopic expanding air and absorbing lithium bromide |
| CN101936616A (en) * | 2010-08-03 | 2011-01-05 | 清华大学 | Evaporative condensate pump circulating year-round refrigeration device |
| CN101949611A (en) * | 2010-10-19 | 2011-01-19 | 河南科技大学 | Low-grade heat energy auxiliary-drive composite low-temperature refrigerating system |
| CN104390387A (en) * | 2014-11-03 | 2015-03-04 | 上海伏波环保设备有限公司 | Dual-working-medium bicirculating refrigeration system |
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| CN104807243A (en) | 2015-07-29 |
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