CN101365917A - Defrost system - Google Patents
Defrost system Download PDFInfo
- Publication number
- CN101365917A CN101365917A CNA2006800465248A CN200680046524A CN101365917A CN 101365917 A CN101365917 A CN 101365917A CN A2006800465248 A CNA2006800465248 A CN A2006800465248A CN 200680046524 A CN200680046524 A CN 200680046524A CN 101365917 A CN101365917 A CN 101365917A
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- China
- Prior art keywords
- defrost
- refrigeration system
- receiver
- defrosting
- refrigeration
- 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.)
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/23—Separators
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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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
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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
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
The present invention relates to a defrost system for defrosting components on which frost is formed, where the defrost system comprises at least one compressor, which has a hot gas outlet, which is connected to condensing means, from where primarily liquid refiigerant is connected to pressure reduction means, from where the flushing refrigerant is led towards evaporator means. The object of the invention is to perform effective defrosting by a defrost system. This can be achieved if the defrost system is formed as an independent cooling system, where the condensing means are transmitting heat to the defrosting components, where the evaporator is cooperating with external cooling means or from the refrigeration system, enabling defrost without deflecting the main system. It can hereby be achieved that the defrost system can operate completely independent of another refrigeration system. All negative effects with traditional defrost operation of refrigeration systems are overcome by means of this solution where the defrost system operates as a system without any influence from the refrigeration system.
Description
Technical field
The present invention relates to a kind of defrost system that is used to frost parts defrosting formed thereon, wherein said defrost system comprises at least one compressor, this compressor has the hot gas outlet that is connected to condensing unit, from this condensing unit mainly is that liquid refrigerant is connected to decompressor, from this decompressor, the cold-producing medium of flash (flushing) is conducted through evaporator.
The invention still further relates to a kind of method that is used to the refrigeration system defrosting, this refrigeration system comprises the refrigeration system component that at least one frost is formed thereon, wherein, defrost by heating in during not moving at this refrigeration system component this refrigeration system component.
Background technology
Prior art shows, can spent glycol or salt solution to come be the refrigeration coil defrosting.The shortcoming of this technical scheme is the erosion problem when liquid moves through pipeline particularly in the knee too soon.A kind of method that addresses this problem is to use as the visible traditional hot gas defrosting that utilizes compressor in the prior art.The shortcoming of this system is, as described in the European patent EP 1 409 936, and the oil management problems when utilizing many compressor operating that is under the different suction pressures.A kind of method that addresses this problem can be with CO
2Be pumped in the pipeline, be heated then/evaporate, and use the hot gas that is produced to come to the coil pipe defrosting, as patent US 5,400,615 or GB 2,258,298 is described.The simple scheme of head it off is under the pressure that is designed for high workload pressure and with CO
2Use brine loop under the situation as the working fluid of condensation under proper temperature.This scheme has solved the problem that exists in brine solution, eliminated the oil management problems in traditional hot gas scheme.It has also eliminated the use as the high-pressure pump that arrives seen at boiling system.
U.S. Pat 6588221 has been described a kind of method for the refrigeration system defrosting, this refrigeration system has one and is connected to the main compressor of condenser by main hot gas discharge pipe, described condenser is connected to thermal expansion valve and cooling coil subsequently by a main liquid line, each thermal expansion valve and cooling coil and other thermal expansion valve and cooling coil are connected in parallel, and each cooling coil is connected to main compressor by suction line.Described Defrost method comprises makes hot gas come to be its defrosting from main hot gas discharge pipe by selected cooling coil, passed through the cooled gas of cooling coil by means of independent dedicated defrost compressor compression, and made the hot gas after the compression return main hot gas discharge pipe.
Summary of the invention
The objective of the invention is to, effectively defrost, thereby avoid oil management problems by means of independent defrost system.Another purpose is to make system cost lower.
If defrost system forms independently cooling system, wherein condensing unit then can be realized above-mentioned purpose to defrosting parts transmission heat.
Can obtain in view of the above, defrost system can be totally independent of the refrigeration system operation.The time be not subjected to any this scheme that influences of refrigeration system by defrost system in operation, all negative effects of traditional defrost operation of refrigeration system are all overcome.Even working fluid can be different, thereby refrigeration system can be used CO
2, and defrost system can be operated with traditional cold-producing medium such as 134A.Therefore may set up the defrost circuit different with the pressure condition in the refrigeration system.In fact, this defrost system is as operation of heat pump, and wherein condensation heat is used for defrosting.Have only that defrost system just can move when being sent through at least one expansion valve and evaporator before returning compressor through the cold-producing medium behind the condensing unit.Carry out the consumption of cold by this way.This cold can be used in combination with refrigeration system.According to the environmental operations condition, the evaporimeter of defrost system can be used as the part of air-conditioning system.Combine with refrigeration system equally, evaporimeter can close use with the condensation or the mistake cold junction of cold-producing medium.
Preferably, the evaporimeter of defrost system can be cooperated with the external refrigeration device or with refrigeration system.This can cause the power consumption of refrigeration system to reduce.
Defrost system can be worked with refrigeration system, and wherein the condensing unit of defrost system is cooperated with the cooling-part that is cooled off by refrigeration system.Can obtain thus, for example evaporimeter can comprise another loop that is used to circulate with the condensation defrost refrigerant.Therefore, defrost in can be during refrigeration system is idle.In refrigeration system, evaporimeter can not participate in work, and defrosting can be carried out in different evaporimeters.In single evaporator systems, refrigeration system is quit work, and defrost system is activated.Therefore, can be to refrigeration system defrosting and need not the antikinesis refrigeration system.
Defrost system can be worked with out-of-work refrigeration system, and wherein the condensing unit of defrost system is cooperated with the cooling-part that is cooled off by refrigeration system.This can cause the quickly defrosting of evaporimeter or other cooling device.
Preferably, defrost system comprises liquid receiver, and this receiver is connected to expansion valve, and wherein the gas from receiver top part connects and can be connected to evaporimeter through control valve.Receiver can be installed in the liquid line or in the compressor suction line.
Can obtain thus, if be the liquefaction that gas form and the amount that is in the defrost fluid under the high pressure have reduced defrost fluid, and the pressure in the liquid receiver is still increasing, and then can open control valve, and make some high pressure defrost gas flow to expansion valve.This high pressure defrost gas is mixed with defrost fluid, and described defrost fluid with flash, the cold that is transported to evaporimeter will be reduced in this way, but defrost system can continue operate as normal behind the process expansion valve.
By evaporimeter being formed in second heat exchanger that heats of cold-producing medium of partially or completely liquefaction by refrigeration system, the evaporimeter of defrost system can be cooperated with refrigeration system.Can obtain thus, all cooling effects that obtained by defrost operation all are transferred to refrigeration system as cold.This can cause the very effective combination of refrigeration system and defrost system.
Cold can be by transmission and the fact that can work under very different pressure and refrigerant type with these two systems is irrelevant.
The top part of the receiver in the defrost system can be used as liquid separator, wherein the top of receiver is by being used to that first heat exchanger of gas liquefaction is connected, this liquid is led back towards receiver, wherein first heat exchanger is the part of stepwise/spray-type heat exchanger, and cascade heat exchanger is the part of refrigeration system.Can obtain thus, if defrost operation does not make the cold-producing medium total condensation, then the gas of relatively large amount will enter receiver.This can cause the pressure in the receiver to raise, and therefore must make the portion gas condensation.This condensation process can be carried out in heat exchanger, makes extra heat be delivered in the refrigeration system by a stepwise refrigeration system, and in refrigeration system, extra heat only directly is transferred to existing condensing unit.By reducing the amount of the gas in the receiver, pressure is lowered, defrost system thereby work more effectively.
Receiver can comprise a heat exchange coil in the part of top, this coil pipe is connected to the liquid outlet of receiver, and wherein coil pipe has reduced the temperature of the gas in the receiver top.This is a kind of replacement method that is used for a certain amount of gas that condensation may finish at receiver in some cases.This coil pipe will automatically cause condensation of gas, and this has also reduced pressure.
Coil pipe, a liquid receiver, an expansion valve and of the independent defrost circuit of used cold-producing medium---utilize be designed for---is thermally connected to the evaporimeter of thermal source to the present invention includes one or more compressors, one or more will the defrosting, this thermal source can be the liquid of air or any kind, for example from other process or from the thermic load of cooling off other products.Cold-producing medium can be for example R134a or CO of any cold-producing medium HFC
2Pure substance or mixture.
The advantage of described system is that the operation of defrost system is irrelevant with first refrigeration system and second refrigeration system as the operation of stepwise refrigeration system.Defrost system can provide chance to make the thermally coupled in any case of process optimizing in design.This interaction is not limited to refrigeration system itself, but also can be connected to other process.
Be also advantageous in that no matter whether refrigeration system work can both defrost.Defrost system also can use with single evaporator systems and not need refrigeration system work.Another advantage of described system is freely selecting of cold-producing medium.All cold-producing mediums can both use, but preferred cold-producing medium is CO
2
Described Defrost method can be by independently defrost system execution, this defrost system comprises the compression set that is used to compress and heat defrost gas at least, by this defrost gas of condensation, this defrost gas heating and cooling system unit, described defrosting is carried out in not during the refrigeration system component the supply system cryogen of refrigeration system, and wherein defrost system comprises the closed-loop path that is used for defrost fluid that is free of attachment to refrigeration system.
This method can cause the very defrosting of Energy Efficient, because heat is to be produced by the defrost system as operation of heat pump, defrost fluid can expand in being connected to the vaporising device of refrigeration system.Because defrost system is independent of refrigeration system, so can use different refrigeration working mediums.
Description of drawings
Fig. 1 illustrates CO
2How system is connected to an example of defrosting coil;
Fig. 2 illustrates the example that defrost system and cooling system how can associated working;
Fig. 3 illustrates an alternative embodiment of the present invention;
Fig. 4 illustrates an external load as evaporimeter;
Fig. 5 illustrates the receiver that comprises coil pipe; And
Fig. 6 illustrates an alternative embodiment of the present invention.
The specific embodiment
Fig. 1 is illustrated in CO in the air-cooled evaporator
2How system is connected to an example of defrosting coil.Fig. 1 illustrates defrost system 2 and refrigeration system 4.Defrost system 2 comprises the compressor 10 with outlet gas line 12,14, and wherein pipeline 12 is connected to magnetic valve 20, pipeline 22 from this magnetic valve 20 lead to one with the condenser 30 of cooling system placed in conjunction.From here, pipeline 32 merges, finishes at pipeline 36 places with another pipeline 34, and this pipeline 36 leads to liquid receiver 40.This liquid receiver has the liquid outlet 42 that leads to expansion valve 50, and pipeline 52 leads to evaporimeter 70 from this expansion valve 50.Pipeline 44 leads to magnetic force control valve 60 from the top part of receiver 40, and pipeline 62 leads to pipeline 52 from this control valve 60 near the inlet of evaporimeter 70.Be furnished with the pipeline 72 that leads to compressor 10 inlets from evaporimeter 70.
When the needs defrost cycle, be positioned at the one or more defrost compressor 10 and the magnetic valve 20 starting/unlatchings in defrosting coil to be defrosted 30 the place aheads.When process begins, will there be many defrost liquid to return liquid receiver 40.In defrost cycle, had relatively large defrost gas to return receiver 40 afterwards, pressure will raise.Superfluous defrost gas can be removed by control valve 60, and is imported in the evaporimeter.The efficient of evaporimeter will descend, but the main purpose of evaporation is the warm defrost gas that produces the defrosting that is used for coil pipe 150.Defrost system can be designed to CO
2, R744 is as the two-phase defrosting compound.Must guarantee that the pressure in the receiver 40 is by means of controlling by air or by the cooling in loop itself.Defrost system can be equipped with other condenser, so that it is used as independently refrigeration system when being not used in defrosting.So it can be used to other purpose such as air conditioning or as a kind of cooling means.Under the situation that does not need a defrosting capacity or the part in all told not to be required, heat can when not being required, be used to utilize air-coil heat supply or for the water heating to be used for other purpose.Compressor 10 is configured in the system based on central authorities.The capacity of each structure (rack) all can be conditioned to be fit to various capacity.In total equipment, may need the evaporimeter of various sizes, when beginning to defrost, may have high demand and lower to some evaporimeters to some demands.This may need can be by the special control strategy of central processing unit for processing.
Described system comprises:
1. the refrigerant loop that only is designed to utilize compressor, defrosting coil/condenser, expansion valve and evaporimeter and perhaps regulates the closure that by-passing valve defrosts in addition;
2. evaporimeter can be by main system or the heating of other thermic load;
3.1 with 2 cold-producing medium can be identical with the cold-producing medium that uses in the main system;
4.1 with 2 cold-producing medium can be different with the cold-producing medium that uses in the main system;
5.3 have with main system in identical working medium, can have the equilibrium connection that is used for filling exchange/equilibrium;
6. defrost cycle can be the part of another process, and defrosts according to the requirement of strengthening process service condition, because condensing pressure may reduce.
Fig. 1 illustrates the example how defrost system and cooling system can unite at work.Most of parts are identical with the explanation of Fig. 1, NM feature before following explanation will only relate to.First difference is, from the cold-producing medium of the liquefaction of refrigeration system 4 in pipeline 102 through heat exchanger 210, in this heat exchanger, this liquid refrigerant carries out heat exchange with the defrost refrigerant that expands from pipeline 52, in expansion valve 50, wherein, be directed before compressor 10 by pipeline 72 in defrost refrigerant, this cold-producing medium evaporates in heat exchanger 210.Cross cold cold-producing medium and be directed into control valve 110 by pipeline 212, and be transported to main receiver 120 from control valve 110 from heat exchanger 210.
With second difference of Fig. 1 be heat exchanger 200, this heat exchanger 200 is arranged to the part as cascade heat exchanger 90, be used for carrying out heat exchange with first cold-producing medium, wherein, heat exchanger 200 is connected to the top of receiver 40 by pipeline 202, and pipeline 204 is directed to primary liquid defrost cold-producing medium in the pipeline 36 that leads to receiver 40.Therefore the gas of HTHP can be transported to condensation in the cascade heat exchanger 200.
The main thought of this circulation is to use cooling capacity so that the liquid that uses in main system is cold excessively.The shortcoming of this scheme is to defrost and can only carries out when main system is worked, and capacity depends on available liquid.
Fig. 3 illustrates an alternative embodiment of the present invention, and wherein hypothesis all or intimate all cold-producing mediums when return receiver all are condensed.To help when main system is not moved, also to provide capacity even in defrost circuit, add air-coil.
Fig. 4 illustrates and system much at one shown in Figure 1, and unique not being both illustrated an external load 220 as evaporimeter.
In the case, cooling capacity is used for cooling off external load.This scheme requires the load on the cold side of defrost cycle constant.
Another receiver 240 shown in Figure 5, this receiver 240 comprises the coil pipe 242 that is used in the internal heat exchange at receiver 240 tops.Control valve 244 is led in the outlet 42 of receiver 240, and pipeline 245 leads to coil pipe 242 from this control valve 244.Expansion valve 50 is led in the outlet of this coil pipe 242.
Fig. 6 illustrates an alternative embodiment of the present invention.Use with preceding figure in identical Reference numeral, so difference only is described below.Now will be delivered to by the cold that defrost system produces in the cascade condenser 390 of refrigeration system 4 by heat exchanger 370.Receiver 340 is worked as previously mentioned, and liquid defrost fluid is sent to heat exchanger 370 from this receiver 340 through expansion valve 50.
This causes the very effective evaporation of defrost liquid, is used for this evaporation from the used heat of stepwise condensing unit.
Claims (9)
1. be used to the defrost system (2) of frost parts formed thereon (150) defrosting, this defrost system (2) comprises at least one compressor (10), this compressor (10) has the hot gas outlet (12) that is connected to condensing unit (30), from this condensing unit, mainly be that liquid refrigerant is connected to decompressor (50), this condensing agent is directed to evaporator (70 from described decompressor, 210,220), it is characterized in that, described defrost system (2) forms independently cooling system, and wherein condensing unit (30) is to defrosting parts (150) transmission heat.
2. defrost system according to claim 1 is characterized in that, described evaporimeter (70,210,220) is cooperated with the external refrigeration device, make it possible to the defrosting and main system (4) is turned to.
3. defrost system according to claim 1 and 2, it is characterized in that, described defrost system (2) is worked with refrigeration system (4), this refrigeration system (4) is in running status, wherein, the condensing unit of defrost system (30) is cooperated with the defrosting parts (150) that cooled off by refrigeration system (4), to be used to parts (150) defrosting.
4. defrost system according to claim 1 and 2, it is characterized in that, described defrost system (2) is worked with refrigeration system (4), this refrigeration system (4) is in halted state, wherein, the condensing unit (30) of defrost system (2) is cooperated with the defrosting parts (150) that cooled off by second refrigeration system (4), to be used to parts (150) defrosting.
5. according to a described defrost system in the claim 1 to 4, it is characterized in that, described defrost system (2) comprises liquid receiver (40), this receiver (40) is connected to expansion valve (50), wherein, the gas connection (44) from receiver (50) top part is connected to receiver (40).
6. according to a described defrost system in the claim 1 to 5, it is characterized in that, by evaporimeter being formed in second heat exchanger (210) that heats of cold-producing medium of partially or completely liquefaction by second refrigeration system (4) evaporimeter (210,220) of defrost system (2) is cooperated with second refrigeration system (4).
7. according to a described defrost system in the claim 1 to 6, it is characterized in that, the top of the receiver (40) in the described defrost system (2) is as liquid separator, wherein, the top of receiver (40) connects into by being used to make first heat exchanger (200) of gas liquefaction, and this liquid gas is returned guiding towards receiver (40), wherein, this first heat exchanger (200) is the part of a stepwise heat exchanger, and described cascade heat exchanger is the part of second refrigeration system (4).
8. according to a described defrost system in the claim 1 to 7, it is characterized in that, described receiver (240) comprises a heat exchange coil (242) in the part of top, this coil pipe (242) is connected to the liquid outlet of receiver (42), wherein, described coil pipe has reduced the temperature of the gas in receiver (240) top.
9. be used to the method for refrigeration system defrosting, comprise the refrigeration system component that at least one frost is formed thereon, wherein defrost by this refrigeration system component of heating in during refrigeration system component is idle, it is characterized in that, defrosting is by independently defrost system execution, this defrost system comprises the compression set that is used to compress and heat defrost gas at least, by the condensation defrost gas, this defrost gas heating and cooling system unit, described defrosting is not being carried out in refrigeration system is during refrigeration system component the supply system cryogen, wherein, described defrost system comprises that one is free of attachment to the closed-loop path that is used for defrost fluid of refrigeration system.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK200501574A DK200501574A (en) | 2005-11-11 | 2005-11-11 | Defrost system |
| DKPA200501574 | 2005-11-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101365917A true CN101365917A (en) | 2009-02-11 |
Family
ID=35517028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800465248A Pending CN101365917A (en) | 2005-11-11 | 2006-11-10 | Defrost system |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20090223232A1 (en) |
| EP (1) | EP1963764A1 (en) |
| CN (1) | CN101365917A (en) |
| DK (1) | DK200501574A (en) |
| WO (1) | WO2007054095A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107421181A (en) * | 2013-12-17 | 2017-12-01 | 株式会社前川制作所 | Refrigerating plant removes defrosting system and cooling unit |
| CN109357438A (en) * | 2018-11-30 | 2019-02-19 | 山东陆海新能源技术有限公司 | The low-temperature air source heat pump of afterheat recovery type removes defrosting system |
| CN115315604A (en) * | 2019-06-04 | 2022-11-08 | 特灵技术生命科学有限责任公司 | Hot gas defrosting control system and method for multi-stage cascade refrigeration system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2135017A4 (en) * | 2007-03-09 | 2010-03-10 | Carrier Corp | Prevention of refrigerant solidification |
| US8789380B2 (en) * | 2009-07-20 | 2014-07-29 | Systemes Lmp Inc. | Defrost system and method for a subcritical cascade R-744 refrigeration system |
| US20140260361A1 (en) * | 2013-03-15 | 2014-09-18 | Benoit RODIER | Refrigeration apparatus and method |
| CN105579790B (en) * | 2013-09-27 | 2017-04-05 | 松下健康医疗控股株式会社 | Refrigerating plant |
| US9869492B2 (en) * | 2015-10-12 | 2018-01-16 | Heatcraft Refrigeration Products Llc | Air conditioning and refrigeration system |
| US20190072299A1 (en) * | 2017-09-06 | 2019-03-07 | Heatcraft Refrigeration Products Llc | Refrigeration system with integrated air conditioning by a high pressure expansion valve |
| US11841179B2 (en) | 2020-01-14 | 2023-12-12 | Goodman Global Group, Inc. | Heating, ventilation, and air-conditioning systems and methods |
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| US2206115A (en) * | 1939-02-23 | 1940-07-02 | Jr Joseph W Obreiter | Air conditioning apparatus |
| US3392541A (en) * | 1967-02-06 | 1968-07-16 | Larkin Coils Inc | Plural compressor reverse cycle refrigeration or heat pump system |
| US3537274A (en) * | 1968-10-18 | 1970-11-03 | Alco Controls Corp | Dual evaporator refrigeration system |
| FR2266123B2 (en) * | 1974-03-28 | 1978-03-31 | Chapuis Henri | |
| US3978684A (en) * | 1975-04-17 | 1976-09-07 | Thermo King Corporation | Refrigeration system |
| US4332137A (en) * | 1979-10-22 | 1982-06-01 | Carrier Corporation | Heat exchange apparatus and method having two refrigeration circuits |
| US4308042A (en) * | 1980-04-11 | 1981-12-29 | Atlantic Richfield Company | Heat pump with freeze-up prevention |
| US4336692A (en) * | 1980-04-16 | 1982-06-29 | Atlantic Richfield Company | Dual source heat pump |
| JPS6470636A (en) * | 1987-09-10 | 1989-03-16 | Toshiba Corp | Air-conditioning machine |
| US5056327A (en) * | 1990-02-26 | 1991-10-15 | Heatcraft, Inc. | Hot gas defrost refrigeration system |
| JPH11173711A (en) * | 1997-12-12 | 1999-07-02 | Daikin Ind Ltd | Dual refrigerator |
| US6058727A (en) * | 1997-12-19 | 2000-05-09 | Carrier Corporation | Refrigeration system with integrated oil cooling heat exchanger |
| JP3094996B2 (en) * | 1998-09-30 | 2000-10-03 | ダイキン工業株式会社 | Binary refrigeration equipment |
-
2005
- 2005-11-11 DK DK200501574A patent/DK200501574A/en not_active Application Discontinuation
-
2006
- 2006-11-10 CN CNA2006800465248A patent/CN101365917A/en active Pending
- 2006-11-10 WO PCT/DK2006/000621 patent/WO2007054095A1/en active Application Filing
- 2006-11-10 US US12/093,245 patent/US20090223232A1/en not_active Abandoned
- 2006-11-10 EP EP06805559A patent/EP1963764A1/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107421181A (en) * | 2013-12-17 | 2017-12-01 | 株式会社前川制作所 | Refrigerating plant removes defrosting system and cooling unit |
| CN109357438A (en) * | 2018-11-30 | 2019-02-19 | 山东陆海新能源技术有限公司 | The low-temperature air source heat pump of afterheat recovery type removes defrosting system |
| CN115315604A (en) * | 2019-06-04 | 2022-11-08 | 特灵技术生命科学有限责任公司 | Hot gas defrosting control system and method for multi-stage cascade refrigeration system |
| CN115315604B (en) * | 2019-06-04 | 2024-01-12 | 特灵技术生命科学有限责任公司 | Hot gas defrosting control system and method for multi-stage cascade refrigeration system |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1963764A1 (en) | 2008-09-03 |
| US20090223232A1 (en) | 2009-09-10 |
| WO2007054095A1 (en) | 2007-05-18 |
| DK200501574A (en) | 2005-11-25 |
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