CN1677014A - Mixed working medium cascade refrigerating system - Google Patents
Mixed working medium cascade refrigerating system Download PDFInfo
- Publication number
- CN1677014A CN1677014A CN 200510013365 CN200510013365A CN1677014A CN 1677014 A CN1677014 A CN 1677014A CN 200510013365 CN200510013365 CN 200510013365 CN 200510013365 A CN200510013365 A CN 200510013365A CN 1677014 A CN1677014 A CN 1677014A
- Authority
- CN
- China
- Prior art keywords
- working medium
- boiling working
- evaporator
- higher boiling
- evaporimeter
- 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.)
- Granted
Links
Images
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention relates to a mixed working medium inner-lapping refrigerating system which comprises a compressor, evaporation pressure adjusting valve, gas-liquor separator and the inside high boiling point working medium evaporator, chilling evaporator and the inside high boiling point working medium evaporator, and the third restriction element between the two high boiling point working medium evaporators in chilling evaporator and in gas-liquor separator. It features that there is a second restriction element between the high boiling point working medium evaporator in gas-liquor separator and the third restriction element, there is a evaporation pressure adjusting valve pipe connected between the output end of above high boiling point working medium evaporator in gas-liquor separator and the output end of the high boiling point working medium evaporator in chilling evaporator. The refrigerating system controls the distribution ratio and the evaporating temperature of high boiling point working medium improving the purity of the working medium, lowering the temperature float when low boiling point working medium evaporates, enhancing system stability while the cooling is fast and stable.
Description
Technical field
The present invention relates to a kind of mixed working fluid refrigeration system, is novel mixed working medium cascade refrigerating system between-50 ℃～-80 ℃ in temperature range especially, and international Patent classificating number intends being Int.Cl
7.F25B1/00.
Background technology
Cryogenic freezing has a wide range of applications in industries such as the energy, military project, biology, medicine, food, material.Cryogenic freezing twin-stage commonly used or multistage steam compression refrigeration circulation and superposition type vapor compression refrigeration system.What twin-stage or multistage steam compression refrigeration recycled is single working medium, when system condensing pressure and evaporating pressure differ greatly, single working medium is many circulations superposition type, and the circulation of high temperature circulation and low temperature is arranged, and lumps together by condenser/evaporator between high temperature and the cryogenic refrigeration circulation.The kind of refrigeration cycle of different temperatures need adopt different cold-producing mediums or refrigeration working medium.Each cooling cycle system all needs to use a compressor.The low temperature stage compressor also had specific (special) requirements: must use subzero oil.Because plain oil meeting retrogradation when low temperature, separation difficulty makes system pipeline not smooth, causes system's operation stability poor, and service life is short.
The multistage fractional condensation circulation primary throttling technology that development in recent years is got up adopts non-azeotropic mixed working medium to make cold-producing medium, and whole system only uses a compressor, equipment minimizing, cost reduction, efficient raising.(referring to Ke Limanku, the mobile overlapping of individual event circulates the refrigeration machine of this fabrication techniques, the conference of the tenth international refrigeration, Copenhagen, Denmark based on the KLEEMENKO circulation theory; Kleemenko A P.One-flowcascade cycle.Proc.10th Int.Congr.Refri., Copenhagen, Denmark, 1959,1:34-39), interior overlapping system is used for the liquefaction of natural vapour, adopts the mixture of 65mol% methane, 20mol% ethane, 15mol% normal butane to obtain optimum efficiency.Cycling through of this technology uses vapour liquid separator and expansion valve, the cooling that can improve any number of stages, vapour liquid separators at different levels to have only liquid phase to expand, thereby keeps the high efficiency of expansion process.Such refrigeration machine begins to enter commercial Application at the end of the sixties, and becomes the main refrigeration machine form of the natural vapour industry of liquefaction rapidly.Though this technology has been avoided adopting a plurality of compressors, uses a plurality of fractional condensation separators that separative efficiency is greatly reduced, and enough room and times can not be provided, allow and conduct heat between the each component cold-producing medium and the mass transfer exchange, do not reach the effect of vapor-liquid separation preferably; In addition, use oil eliminator can make a large amount of high-pressure refrigerants before not freezing, just not return compressor, cause energy dissipation, and do not have separated lubricating oil still can be brought to the low temperature part of system on a small quantity, cause system pipeline not smooth with lubricating oil.KLEEMENKO circulation is based on and realizes on the basis of gas compression refrigerating machine on the other hand.Be used for steam compression type refrigeration circulation, less demanding to the proportioning accuracy of working medium, and to enter the allocation proportion of rectifier unit and condenser/evaporator relevant with temperature control with system higher boiling working medium.The warm area component is too much separated in the middle of this technology, causes the refrigeration machine whole efficiency to descend.
Patent documentation (publication number CN1363815A) shows, adopts smart slip device isolation technics can separate high and low boiling point working medium effectively.But the evaporating temperature that enters rectifier unit and condenser/evaporator owing to higher boiling working medium is different, according to this systemic circulation, can make the branch that enters rectifier unit and condenser/evaporator in higher boiling working medium mix and be difficult to control, though its separative efficiency improves, be difficult to the commercialization and the industrialization of realization technology.In addition, experiment shows, the low boiling working fluid that contains ratio seldom in higher boiling working medium is very little to the influence of system, but contains the drift that the higher boiling working medium of ratio seldom can produce the low boiling working fluid evaporating temperature in the low boiling working fluid, causes the stability of a system poor.Therefore in rectifying column to the heating of higher boiling working medium to improve having little significance of higher boiling working medium purity.
Summary of the invention
The object of the invention is to overcome above-mentioned defective of the prior art, and the technical problem that solve is a kind of mixed working medium cascade refrigerating system of design.It can realize the better endless form of mixed working medium cascade refrigerating system, the control of realization system better, and the refrigerating efficiency height, stable, and be convenient to realize commercialization.
The technical scheme that the present invention solve the technical problem is: design a kind of mixed working medium cascade refrigerating system, comprise compressor, evaporating pressure regulating valve, vapour liquid separator and interior higher boiling working medium evaporimeter thereof, condenser/evaporator and interior higher boiling working medium evaporimeter thereof, and the 3rd restricting element that pipe connects between the higher boiling working medium evaporimeter in interior higher boiling working medium evaporimeter of vapour liquid separator and the condenser/evaporator, it is characterized in that being connected with second restricting element between the higher boiling working medium evaporimeter and the 3rd restricting element in the described vapour liquid separator, in described vapour liquid separator in the output of higher boiling working medium evaporimeter and the condenser/evaporator between the output of higher boiling working medium evaporimeter pipe be connected to evaporating pressure regulating valve.
Good effect of the present invention shows: mixed working medium cascade refrigerating system of the present invention is owing to adopted feed flow design along separate routes when higher boiling working medium enters rectifier unit and condenser/evaporator, and designed the evaporating pressure adjusting device, thereby make the interior overlapping system of both vapor compression more be tending towards rationalizing, can effectively control the allocation proportion and the evaporating temperature of higher boiling working medium, improve the purity of low boiling working fluid, temperature drift when reducing the low boiling working fluid evaporation, increase entire system stability, can solve the low and common overlapping vapor compression refrigeration system complex structure of original twin-stage or multistage steam compression refrigerating system refrigerating capacity, the problem that the system balancing time is long, and can solve the difficult problem of existing cascade refrigerating system control.Experiment shows that refrigeration system cooling rate of the present invention is fast, and (referring to Fig. 2) operates steadily.
Description of drawings
Fig. 1 is the overall schematic of a kind of embodiment of mixed working medium cascade refrigerating system of the present invention.1-compressor, 2-condenser, 3-the 3rd regenerator, 4-first throttle element, 5-vapour liquid separator, 6-higher boiling working medium evaporimeter, 7-second regenerator, 8-magnetic valve, 9-second restricting element, 10-the 3rd restricting element, 11-evaporating pressure regulating valve, 12-higher boiling working medium evaporimeter, 13-condenser/evaporator, 14-first regenerator, 15-magnetic valve, 16-the 4th restricting element, 17-low boiling working fluid evaporimeter, 18-are incubated casing.
Fig. 2 is the temperature lowering curve lab diagram according to the cascade refrigerating system of thinking installation of the present invention.
The specific embodiment
Be described in detail the present invention below in conjunction with embodiment and accompanying drawing thereof:
Mixed working medium cascade refrigerating system of the present invention (referring to Fig. 1), comprise compressor 1, evaporating pressure regulating valve 11, vapour liquid separator 5 and interior higher boiling working medium evaporimeter 6 thereof, condenser/evaporator 13 and interior higher boiling working medium evaporimeter 12 thereof, and the 3rd restricting element 10 that pipe connects between the higher boiling working medium evaporimeters 12 in vapour liquid separator 5 interior higher boiling working medium evaporimeters 6 and the condenser/evaporator 13, it is characterized in that being connected with second restricting element 9 between described vapour liquid separator 5 interior higher boiling working medium evaporimeters 6 and the 3rd restricting element 10, pipe is connected to evaporating pressure regulating valve 11 between the output of the output of higher boiling working medium evaporimeter 6 and condenser/evaporator 13 higher boiling working medium evaporimeters 12 in described vapour liquid separator 5.
The new design feature of mixed working medium cascade refrigerating system of the present invention is: 1. adopt feed flow design along separate routes when higher boiling working medium enters vapour liquid separator 5 and condenser/evaporator 13, use two restricting elements to realize accurate control.Simultaneously, because higher boiling working medium enters the different back-steam pressure differentials that cause of the evaporating temperature of vapour liquid separator 5 and condenser/evaporator 13, the present invention has adopted evaporating pressure regulating valve 11 to realize the balance of system for balance; 2. on the version of vapour liquid separator 5, the present invention has removed in traditional rectifying column the heater to higher boiling working medium, and the evaporator external of higher boiling working medium in vapour liquid separator 5 and the contact area of filler have been increased, in vapour liquid separator 5, realize thermograde preferably, improve the capture function of higher boiling working substance steam, thereby increase the purity of the low boiling working fluid steam that enters condenser/evaporator 13, reduce low boiling working fluid evaporating temperature drift phenomenon, improved the stability of a system.
Vapour liquid separator 5 described in the refrigeration system of the present invention and supporting pipeline, promptly material filling type rectifying column or distillation system are prior aries.This rectifying column is in the chemical field extensive use, and main effect is to separate through condenser 2 condensations and through the higher boiling working medium and the uncooled low boiling working fluid of the 3rd regenerator 3.Low boiling working fluid gas enters condenser/evaporator 13 condensations behind the heat exchanging tampering of vapour liquid separator 5 fillers, the higher boiling working substance steam that the while low boiling working fluid is carried secretly enters second regenerator 7 after higher boiling working medium evaporimeter 6 is condensed to liquid.
In present refrigeration system, the effect of higher boiling working medium evaporimeter 6 is the higher boiling working medium that condensation low boiling working fluid gas is carried secretly, and the effect of higher boiling working medium evaporimeter 12 is condensation low boiling working fluids, so both evaporating temperatures are obviously different.Prior art (as patent CN1363815A) has been ignored this difference, causes the refrigeration system equilibration time long, the vapor-liquid separation weak effect.Appropriate design has also installed second restricting element 9 and evaporating pressure regulating valve 11 additional as described in the refrigeration system of the present invention, is the innovation of cascade refrigerating system technology.The evaporating temperature of higher boiling working medium evaporimeter 6 and higher boiling working medium evaporimeter 12 can be more effectively controlled in new design, guarantee the effective temperature gradient in the vapour liquid separator 5, avoid the condensation of low boiling working fluid in vapour liquid separator 5, simultaneously according to can effectively guaranteeing the condensation of low boiling working fluid in condenser/evaporator 13 different seasons.
The compressor 1 that refrigeration system of the present invention is used is the common refrigeration compressor with oil lubrication, and compression ratio is less than 12.Its effect is that the compression and low pressure mixed working fluid is with its pressure that raises.Do not need cryogenic compressor in the refrigeration system of the present invention, and lubricating oil also is plain oil, in other words also without limits to the use of lubricating oil, therefore not only can reduce the refrigeration system production cost, also can reduce the refrigeration system use cost, the convenient use is convenient to promote.
Described second restricting element 9 of refrigeration system of the present invention and first throttle element 4, the 3rd restricting element 10 are the same with the 4th restricting element 16, are decompressor.Its effect is to make highly pressurised liquid or the decompression of high pressure mixing working medium.Described second restricting element 9 can be various throttling arrangements, for example can be one section capillary, also can be the valve of automatic or manual, or their any combination.
The described evaporating pressure regulating valve 11 of refrigeration system of the present invention is pressure-regulating devices, be used to regulate same one or more Working medium gas of different evaporating temperatures, make wherein high-pressure section pressure reduce to low-pressure section,, overcome the defective of prior art to avoid the feed flow inequality of different temperatures evaporimeter.Described evaporating pressure regulating valve 11 embodiment are common cooling evaporating pressure regulating valve.But this is not limited.Other constant pressure device, perhaps can carry out the device that evaporating pressure regulates with temperature, pressure can be suitable for.
Condenser 2 of the present invention is a heat exchanger.Its effect is the heat of emitting Working medium gas.Make the condensation therein of higher boiling working medium, low boiling working fluid cools off therein.Its heat-absorbing medium that adopts can be normal-temperature water, air or other fluids.
First regenerator 14 of the present invention, second regenerator 7, the 3rd regenerator 3 are heat exchanger.The one side is by the low pressure working fluid fluid, and opposite side is by high-pressure working medium fluid or high pressure vapour-liquid mixed working fluid, to realize heat exchange.The heat exchange form that heat exchanger adopts is not limited, and can be plate type heat exchanger, also can be spiral tube heat exchanger, double pipe heat exchanger, or the heat exchanger of other form.
Described vapour liquid separator 5 is a vapor-liquid separating device.Its effect is that the mixing vapour-liquid working medium that two or more boiling points are different is separated, and makes low boiling working fluid gas enter condenser/evaporator 13 from top, and the higher boiling worker quality liquid then sinks to the bottom.Simultaneously, make mist lubrication oil sink, take back compressor 1 to, avoid lubricating oil to enter cryogenic system and cause the obstruction of system by higher boiling working medium because the flow velocity of mixed working fluid in vapour liquid separator 5 is lower.
Described low boiling working fluid evaporimeter 17 also is a heat exchanger.The one side is evaporated heat absorption by low-pressure low-temperature low boiling working fluid fluid, makes low boiling working fluid evaporate therein, and opposite side is the cooled object heat release, and cooled object can be fluid or solid.
Described higher boiling working medium evaporimeter 6 is an evaporimeter.Its effect is to make the evaporation of higher boiling worker quality liquid to be condensate in the higher boiling working substance steam of carrying secretly in the low boiling working fluid gas.
Described higher boiling working medium evaporimeter 12 also is an evaporimeter.Its effect is to make the evaporation of higher boiling worker quality liquid with the condensation low boiling working fluid.
Described condenser/evaporator 13 also is a heat exchanger, is prior art, and main effect is the evaporative condenser low boiling working fluid that utilizes higher boiling working medium.One side process be low pressure high boiling liquid working medium, and evaporation heat absorption; The opposite side process be high pressure low-boiling point gas working medium, and condensation heat release.
Described magnetic valve 8, magnetic valve 15 are common electric stop valves, the pressure of high-low pressure both sides during in order to the assurance system-down.
Described insulation casing 18 is made up of insulation material and backing material, is not run off to guarantee cold.The form of insulation can be vacuum type, material filling type, heat shielding formula, or their combination.
The mixed working fluid that described refrigeration system is used be the different working medium of high low boiling to or the combination of several working medium.Described working medium can be selected in following material: R134a, R22, R290, R600a, R123, R23, R13, R50, R1150, R170 etc., for example the working medium that can select is to being: R134a/R23, R600a/R170, R290/R50 or R290/R170 etc. also can be that the working medium of isolated gas composition from air or natural gas is right.
The part that mixed working medium cascade refrigerating system of the present invention is not addressed is applicable to prior art.
The course of work of refrigeration system of the present invention following (referring to Fig. 1): from the low pressure low boiling working fluid of the 3rd regenerator 3 with together enter compressor 1 through evaporating pressure regulating valve 11 and through the low pressure higher boiling Working medium gas of higher boiling working medium evaporimeter 12, the high pressure mixing Working medium gas of compressed machine 1 compression enters condenser 2, emits heat and is cooled to the high pressure liquid-vapor mixture.Wherein higher boiling working medium is condensed into liquid, and low boiling working fluid is for still being gas.The high pressure liquid-vapor mixture by low temperature low boiling working fluid gas cooled, enters vapour liquid separator 5 through the 4 throttling step-downs of first throttle element through the 3rd regenerator 3, carries out the separation of two kinds of working medium.In vapour liquid separator 5, vapour phase partly rises and enters the top of vapour liquid separator 5, and the liquid phase mixture of higher boiling working medium sinks to its bottom.Bottom liquid phases higher boiling working medium through second regenerator 7 once more by low temperature low boiling working fluid gas cooled, through being divided into two-way behind the magnetic valve 8: wherein one the tunnel enter higher boiling working medium evaporimeter 6 in the vapour liquid separator 5 through the 9 throttling step-downs of second restricting element, the higher boiling working substance steam of being carried secretly by low boiling working fluid gas in order to condensation is after evaporating pressure regulating valve 11 is got back to compressor 1; Another Lu Jingdi three restricting elements 10 throttling step-downs enter the higher boiling working medium evaporimeter 12 in the condenser/evaporator 13, get back to compressor 1 with the higher boiling working substance steam merging in evaporating pressure regulating valve 11 exits behind the condensation low boiling working fluid.
Enter condenser/evaporator 13 at the top of vapour liquid separator 5 low boiling working fluid gas after higher boiling working medium evaporimeter 6 cooling is purified, the content of these low boiling working fluids is than the low boiling working fluid content height of vapour liquid separator 5 middle and upper parts.Cooling through higher boiling working medium evaporimeter 12 in condenser/evaporator 13 is condensed into liquid, after first regenerator 14 cools off once more, the low boiling working fluid evaporimeter 17 that enters in the insulation casing 18 by magnetic valve 15,16 step-downs of the 4th restricting element evaporates absorbing and cooling temperatures, has realized the refrigeration purpose.The low pressure low boiling working fluid gas that comes out from low boiling working fluid evaporimeter 17 after evaporating enters first regenerator 14, second regenerator 7 and the 3rd regenerator 3 successively, the heat absorption back is back to compressor 1 with the merging of low pressure higher boiling working substance steam, and mist is compressed once more.Thereby finish whole systemic circulation.
Claims (4)
1. mixed working medium cascade refrigerating system, comprise compressor (1), evaporating pressure regulating valve (11), vapour liquid separator (5) and interior higher boiling working medium evaporimeter (6) thereof, condenser/evaporator (13) and interior higher boiling working medium evaporimeter (12) thereof, and the 3rd restricting element (10) that pipe connects between vapour liquid separator (5) interior higher boiling working medium evaporimeter (6) and condenser/evaporator (13) the interior higher boiling working medium evaporimeter (12), it is characterized in that being connected with second restricting element (9) between described vapour liquid separator (5) interior higher boiling working medium evaporimeter (6) and the 3rd restricting element (10), pipe is connected to evaporating pressure regulating valve (11) between the output of the output of higher boiling working medium evaporimeter (6) and condenser/evaporator (13) higher boiling working medium evaporimeter (12) in described vapour liquid separator (5).
2. mixed working medium cascade refrigerating system according to claim 1 is characterized in that described second restricting element (9) is the valve of one section capillary, automatic or manual, or their any combination.
3. mixed working medium cascade refrigerating system according to claim 1 is characterized in that described evaporating pressure regulating valve (11) is common cooling evaporating pressure regulating valve.
4. according to claim 1,2 or 3 described mixed working medium cascade refrigerating systems, it is characterized in that described compressor (1) is the lubricated refrigeration compressor of conventional oil, compression ratio is less than 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510013365A CN100578112C (en) | 2005-04-27 | 2005-04-27 | Mixed working medium cascade refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510013365A CN100578112C (en) | 2005-04-27 | 2005-04-27 | Mixed working medium cascade refrigerating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1677014A true CN1677014A (en) | 2005-10-05 |
| CN100578112C CN100578112C (en) | 2010-01-06 |
Family
ID=35049675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510013365A Expired - Fee Related CN100578112C (en) | 2005-04-27 | 2005-04-27 | Mixed working medium cascade refrigerating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100578112C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357674C (en) * | 2006-01-20 | 2007-12-26 | 天津商学院 | Water-cooling inside superposed refrigerating system |
| CN100434831C (en) * | 2006-02-15 | 2008-11-19 | 大连水产学院 | Automatic cascade type refrigerating and circulating system with unfixedly proportioned hybrid medium |
| CN100453928C (en) * | 2007-10-09 | 2009-01-21 | 上海理工大学 | Automatic cascade refrigeration system exhaust pressure regulating device |
| CN101839579A (en) * | 2010-05-31 | 2010-09-22 | 西安交通大学 | Auto-cascade heat pump with middle throttling element and adjusting method thereof |
| CN102141317A (en) * | 2011-03-16 | 2011-08-03 | 浙江大学 | Rectification-type self-overlaying gas liquefying system |
| CN103822389A (en) * | 2013-12-10 | 2014-05-28 | 中国科学院理化技术研究所 | Multi-element mixed working medium back-heating type throttling and refrigerating circulation system with dephlegmator-separator |
| CN109481000A (en) * | 2018-12-26 | 2019-03-19 | 上海导向医疗系统有限公司 | For cold therapy can pressure controlled refrigerating plant and cold therapy system |
-
2005
- 2005-04-27 CN CN200510013365A patent/CN100578112C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357674C (en) * | 2006-01-20 | 2007-12-26 | 天津商学院 | Water-cooling inside superposed refrigerating system |
| CN100434831C (en) * | 2006-02-15 | 2008-11-19 | 大连水产学院 | Automatic cascade type refrigerating and circulating system with unfixedly proportioned hybrid medium |
| CN100453928C (en) * | 2007-10-09 | 2009-01-21 | 上海理工大学 | Automatic cascade refrigeration system exhaust pressure regulating device |
| CN101839579A (en) * | 2010-05-31 | 2010-09-22 | 西安交通大学 | Auto-cascade heat pump with middle throttling element and adjusting method thereof |
| CN102141317A (en) * | 2011-03-16 | 2011-08-03 | 浙江大学 | Rectification-type self-overlaying gas liquefying system |
| CN102141317B (en) * | 2011-03-16 | 2012-07-25 | 浙江大学 | Rectification-type self-overlaying gas liquefying system |
| CN103822389A (en) * | 2013-12-10 | 2014-05-28 | 中国科学院理化技术研究所 | Multi-element mixed working medium back-heating type throttling and refrigerating circulation system with dephlegmator-separator |
| CN103822389B (en) * | 2013-12-10 | 2016-08-17 | 中国科学院理化技术研究所 | The multicomponent mixture work medium back-heating type throttling refrigeration blood circulation that band fractional condensation separates |
| CN109481000A (en) * | 2018-12-26 | 2019-03-19 | 上海导向医疗系统有限公司 | For cold therapy can pressure controlled refrigerating plant and cold therapy system |
| CN109481000B (en) * | 2018-12-26 | 2023-11-21 | 上海导向医疗系统有限公司 | Pressure-adjustable refrigeration device for cryotherapy and cryotherapy system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100578112C (en) | 2010-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Arpagaus et al. | Multi-temperature heat pumps: A literature review | |
| CN100578112C (en) | Mixed working medium cascade refrigerating system | |
| WO2015140879A1 (en) | Refrigeration cycle device | |
| CN102080903A (en) | Refrigerating apparatus | |
| CN100476322C (en) | Super-low-temperature refrigerant system with pipeline preventing freezing | |
| RU2005132173A (en) | UNITED MULTI-LOOP COOLING COOLING METHOD | |
| Yoon et al. | Performance optimization of a Lorenz–Meutzner cycle charged with hydrocarbon mixtures for a domestic refrigerator-freezer | |
| US20100011791A1 (en) | R422d heat transfer systems and r22 systems retrofitted with r422d | |
| CN105737427A (en) | One-grade self-overlaying low-temperature refrigeration circulating system using double-stage gas-liquid separator | |
| Bai et al. | Experimental investigation on the dynamic malfunction behavior of the two-phase ejector in a modified auto-cascade freezer refrigeration system | |
| Stoecker et al. | Conserving energy in domestic refrigerators through the use of refrigerant mixtures | |
| JP3934140B2 (en) | Non-azeotropic refrigerant | |
| CN201449080U (en) | Multi-temperature refrigerating plant using single compressor | |
| CN1152218C (en) | Deep refrigerating method and equipment | |
| CN2867223Y (en) | Water-cooled internal multiplex refrigerating system | |
| CN104067072A (en) | Cascade refrigeration system | |
| CN100357674C (en) | Water-cooling inside superposed refrigerating system | |
| CN110906583B (en) | Refrigerating device under action of electrostatic field | |
| CN111043783B (en) | Self-cascade refrigeration system for trapping cryogenic water vapor and control method | |
| JP2007085729A (en) | Refrigerator system using non-azeotropic refrigerant | |
| CN204421409U (en) | The direct evaporative freezing device that within a kind of subzero 40 degrees Celsius, reaction condition controls | |
| US6666046B1 (en) | Dual section refrigeration system | |
| CN2667412Y (en) | Single-macine, multi-temperature steam compressing refrigerator | |
| RU2134386C1 (en) | Method of separation of gases (versions) | |
| RU2802107C2 (en) | Heat pump operation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100106 Termination date: 20110427 |