CN1560544A - Carbon dioxide refrigerator - Google Patents
Carbon dioxide refrigerator Download PDFInfo
- Publication number
- CN1560544A CN1560544A CNA200410016559XA CN200410016559A CN1560544A CN 1560544 A CN1560544 A CN 1560544A CN A200410016559X A CNA200410016559X A CN A200410016559XA CN 200410016559 A CN200410016559 A CN 200410016559A CN 1560544 A CN1560544 A CN 1560544A
- Authority
- CN
- China
- Prior art keywords
- compressor
- capillary
- temperature
- subcritical
- carbon dioxide
- 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
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
- 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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- 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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/385—Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same evaporator
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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
- F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0252—Compressor control by controlling speed with two speeds
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2511—Evaporator distribution valves
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2102—Temperatures at the outlet of the gas cooler
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention is a carbon dioxide refrigerator, which includes compressor, condenser, two-position three-way electromagnetic valve, crisis spanned capillary, subcritical capillary, evaporator, temperature sensor, controller. The system uses carbon dioxide refrigerating agent, the compressor has two gears of rotation speed, and the output aperture of the condenser is distributed with temperature sensor for sensing the refrigerating temperature here. When the temperature measured by the sensor is lower than 28deg.C, the compressor uses low rotation speed, the subcritical capillary is connected; when the temperature is higher than 28deg.C, the compressor uses high rotation speed, the crisis spanning capillary is connected. The system can avoid the carbon dioxide condensing temperature from change in the near-critical area, thus it can upgrade the system efficiency effectively; the match of the system in critical spanning circulation and the subcritical circulation; it avoids the problem that the cold quantity generated by the compressor is not enough but it runs in a long time, it also can avoid the problem that the cold quantity is too large leading to that the starting-up and closing period is short.
Description
Technical field:
What the present invention relates to is a kind of refrigerator, and particularly a kind of carbon dioxide refrigerator that adopts carbon dioxide as cold-producing medium is used for food storage, fresh-keeping, belongs to refrigeration technology field.
Background technology:
Once used artificial synthetic cold-producing medium in the refrigerating plant in a large number, and environment had been caused serious destruction.Though people can make great efforts the synthetic better cold-producing medium of performance, owing to cold-producing medium inevitably discharges, therefore a large amount of productions of any artificial cold-producing medium that synthesizes all can cause harmful effect to environment with use.Cold-producing medium to be fundamentally solved for the environment damage problem, unartificial synthetic natural cold-producing medium should be adopted.
Carbon dioxide is nontoxic, do not fire, be easy to obtain, cheap, be considered to a kind of comparatively ideal natural cold-producing medium, obtained the generally attention of international refrigeration circle.But because the critical-temperature of carbon dioxide has only 31.1 ℃, far below our critical-temperature of used cold-producing medium in refrigerating plants such as refrigerator, air-conditioning at present, therefore Lorentzen proposes a kind of critical-cross carbon dioxide refrigeration system, be that cold-producing medium discharges heat under supercriticality, under subcritical state, freeze.In the prior art, Pettersen J and Lorentzen G are at document " A new efficient and environmentally benign system for automobile airconditioning " (ASHAE Transactions, 1993,102 (5): propose 135-145) the critical-cross carbon dioxide refrigeration system is applied to air conditioning for automobiles.But the applying working condition of refrigerator has significantly different with air conditioning for automobiles.For air conditioning for automobiles, the environment temperature all higher (being generally more than 25 ℃) when needing refrigeration makes the temperature of high-pressure side carbon dioxide coolant be higher than 31.1 ℃ critical-temperature, and refrigeration system circulates to striding critical cycle.And for refrigerator, the variation of ambient temperature scope is bigger, not only needs refrigeration than high ambient temperature the time, when environment temperature is lower, even still needs refrigeration when being lower than 0 ℃.Therefore be the refrigerator of cold-producing medium for carbon dioxide, refrigeration system is in the variation of striding critical cycle and subcritical cycle.Because the matching properties of system has tangible difference striding under critical cycle and the subcritical cycle, particularly in the condensation of refrigerant temperature during near the subcritical cycle of critical-temperature, system will produce efficient and obviously descend the degradation problem, and therefore the critical-cross carbon dioxide refrigeration system that can not directly Lorentzen be proposed is used for refrigerator.
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art, design provides a kind of refrigerator that adopts carbon dioxide as cold-producing medium, overcoming existing carbon dioxide refrigerating system can not stride the critical problem that can both guarantee system's matched well during with subcritical cycle, and during subcritical cycle when condensation of refrigerant temperature obvious problem of decline of system effectiveness during near critical-temperature.
For realizing such purpose, in the refrigeration system of carbon dioxide refrigerator of the present invention, settled a temperature sensor in the exit of condenser, be used for the refrigerant temperature of perception condensator outlet; Compressor adopts two rotating speed compressors, has height second gear rotating speed; Capillary as throttle mechanism has two, is respectively to stride critical capillary and subcritical capillary, and this two capillary communicates with two-position three way magnetic valve.Compressor is to adopt the high rotating speed or the slow-speed of revolution, and two-position three way magnetic valve control cold-producing medium flows through that to stride critical capillary still be subcritical capillary, and this all depends on the temperature that temperature sensor records.
The condensator outlet temperature that records when temperature sensor is during smaller or equal to 28 ℃, compressor adopts the slow-speed of revolution, subcritical capillary is connected, and this moment, cold-producing medium passed through compressor, condenser, two-position three way magnetic valve, subcritical capillary, evaporimeter successively, returned compressor at last.The condensator outlet temperature that records when temperature sensor is during greater than 28 ℃, compressor adopts high rotating speed, stride critical capillary and connect, cold-producing medium passed through compressor, condenser, two-position three way magnetic valve successively, strode critical capillary, evaporimeter this moment, returned compressor at last.
The present invention has significant advantage and good effect.Since in the condensator outlet temperature from changing to when being higher than 28 ℃ smaller or equal to 28 ℃, compressor changes high rotating speed shelves over to by slow-speed of revolution shelves, make the temperature and pressure of high-pressure side cold-producing medium rise rapidly like this, its duty arrives supercritical region, the condensator outlet temperature reaches more than 32 ℃, thereby avoid condensation temperature to change, to raise the efficiency effectively at close-to-critical range.Corresponding to the high rotating speed shelves and the slow-speed of revolution shelves of compressor, two different capillaries so just can be adjusted the length of two capillaries respectively as restricting element under different compressor rotary speeds, make things convenient for system matches.Because condensation temperature lower (height) is corresponding to environment temperature lower (height); the refrigeration duty lower (height) of this moment; this moment, compressor adopted low (height) rotating speed in fact to reach compressor refrigerating capacity and the synchronous effect that changes of refrigeration duty; both can avoid the not enough and long playing problem of compressor cold, the problem that the startup-shutdown cycle is short and the startup-shutdown loss is big of also avoiding the compressor cold to cause too greatly.
Description of drawings:
Fig. 1 is a carbon dioxide refrigeration system of refrigerator schematic diagram of the present invention.
Among the figure, the 1st, compressor, the 2nd, condenser, the 3rd, two-position three way magnetic valve, the 4th, stride critical capillary, the 5th, subcritical capillary, the 6th, evaporimeter, the 7th, temperature sensor, the 8th, controller.
Dotted line represents that control signal connects among the figure.
The specific embodiment:
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
As shown in Figure 1, the present invention includes compressor 1, condenser 2, two-position three way magnetic valve 3 is striden critical capillary 4, subcritical capillary 5, evaporimeter 6, temperature sensor 7, controller 8.
Compressor 1 outlet is connected with condenser 2 imports, condenser 2 outlets are connected with two-position three way magnetic valve 3 inlets, outlet of two-position three way magnetic valve 3 with stride critical capillary 4 imports and be connected, another outlet is connected with subcritical capillary 5 imports, stride critical capillary 4 and all be connected with evaporimeter 6 imports with subcritical capillary 5 outlets, evaporimeter 6 outlets are connected with compressor 1 inlet.Temperature sensor 7 is close on the condenser 2 outlet walls, and the output of temperature sensor 7 is electrically connected with the input of controller 8, and the output of controller 8 is electrically connected with compressor 1, two-position three way magnetic valve 3 respectively.
Compressor 1 adopts the totally-enclosed compressor with two rotating speed shelves, and condenser 2 adopts the coil of wire tubular type, and capillary 4,5 adopts the minor diameter copper pipe, and evaporimeter 6 adopts the tube-sheet type evaporimeter, and temperature sensor 7 adopts thermal resistance, and controller 8 adopts single-chip microcomputer.
When refrigerator needed cold, the temperature that records according to temperature sensor 7 was determined the action of compressor 1 and two-position three way magnetic valve 3.The temperature that records when temperature sensor 7 is during smaller or equal to 28 ℃, compressor 1 adopts the slow-speed of revolution, subcritical capillary 5 is connected, and this moment, cold-producing medium passed through compressor 1, condenser 2, two-position three way magnetic valve 3, subcritical capillary 5, evaporimeter 6 successively, returned compressor 1 at last.The temperature that records when temperature sensor 7 is during greater than 28 ℃, compressor 1 adopts high rotating speed, stride critical capillary 4 and connect, cold-producing medium passed through compressor 1, condenser 2, two-position three way magnetic valve 3 successively, strode critical capillary 4, evaporimeter 6 this moment, returned compressor 1 at last.
Claims (2)
1, a kind of carbon dioxide refrigerator, comprise compressor (1), condenser (2), two-position three way magnetic valve (3), stride critical capillary (4), subcritical capillary (5), evaporimeter (6), temperature sensor (7), controller (8), it is characterized in that compressor (1) outlet is connected with condenser (2) import, condenser (2) outlet is connected with two-position three way magnetic valve (3) import, outlet of two-position three way magnetic valve (3) with stride critical capillary (4) import and be connected, another outlet is connected with subcritical capillary (5) import, the outlet of striding critical capillary (4) and subcritical capillary (5) all is connected with evaporimeter (6) import, evaporimeter (6) outlet is connected with compressor (1) inlet, temperature sensor (7) is close on condenser (2) the outlet wall, the output of temperature sensor (7) is electrically connected with the input of controller (8), the output of controller (8) respectively with compressor (1), two-position three way magnetic valve (3) is electrically connected.
2, according to the said carbon dioxide refrigerator of claim 1, it is characterized in that: compressor (1) adopts two rotating speed compressors, the temperature that records when temperature sensor (7) is during smaller or equal to 28 ℃, compressor (1) adopts the slow-speed of revolution, subcritical capillary (5) is connected, the temperature that records when temperature sensor (7) is during greater than 28 ℃, and compressor (1) adopts high rotating speed, strides critical capillary (4) and connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410016559XA CN1259536C (en) | 2004-02-26 | 2004-02-26 | Carbon dioxide refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410016559XA CN1259536C (en) | 2004-02-26 | 2004-02-26 | Carbon dioxide refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1560544A true CN1560544A (en) | 2005-01-05 |
| CN1259536C CN1259536C (en) | 2006-06-14 |
Family
ID=34440531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410016559XA Expired - Fee Related CN1259536C (en) | 2004-02-26 | 2004-02-26 | Carbon dioxide refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1259536C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458294C (en) * | 2006-12-01 | 2009-02-04 | 珠海格力电器股份有限公司 | Output control method for ice cold accumulation machine set compressor |
| WO2014087168A1 (en) * | 2012-12-07 | 2014-06-12 | Elstat Electronics Ltd | Co2 refrigeration system |
| EP2631568A3 (en) * | 2012-02-21 | 2014-08-13 | Whirlpool Corporation | Refrigeration arrangement and methods for reducing charge migration losses |
| US9285161B2 (en) | 2012-02-21 | 2016-03-15 | Whirlpool Corporation | Refrigerator with variable capacity compressor and cycle priming action through capacity control and associated methods |
| US9696077B2 (en) | 2012-02-21 | 2017-07-04 | Whirlpool Corporation | Dual capillary tube / heat exchanger in combination with cycle priming for reducing charge migration |
| CN108626935A (en) * | 2018-05-18 | 2018-10-09 | 青岛海尔股份有限公司 | Refrigerator and its compressor frequency control method |
| CN110487020A (en) * | 2019-08-26 | 2019-11-22 | 河南新飞制冷器具有限公司 | Frequency conversion refrigerator control method for frequency |
| CN111336707A (en) * | 2020-02-29 | 2020-06-26 | 同济大学 | Carbon dioxide heat pump heating system with topologic homoembryo circulation |
-
2004
- 2004-02-26 CN CNB200410016559XA patent/CN1259536C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458294C (en) * | 2006-12-01 | 2009-02-04 | 珠海格力电器股份有限公司 | Output control method for ice cold accumulation machine set compressor |
| EP2631568A3 (en) * | 2012-02-21 | 2014-08-13 | Whirlpool Corporation | Refrigeration arrangement and methods for reducing charge migration losses |
| US9285161B2 (en) | 2012-02-21 | 2016-03-15 | Whirlpool Corporation | Refrigerator with variable capacity compressor and cycle priming action through capacity control and associated methods |
| US9618246B2 (en) | 2012-02-21 | 2017-04-11 | Whirlpool Corporation | Refrigeration arrangement and methods for reducing charge migration |
| US9696077B2 (en) | 2012-02-21 | 2017-07-04 | Whirlpool Corporation | Dual capillary tube / heat exchanger in combination with cycle priming for reducing charge migration |
| WO2014087168A1 (en) * | 2012-12-07 | 2014-06-12 | Elstat Electronics Ltd | Co2 refrigeration system |
| CN108626935A (en) * | 2018-05-18 | 2018-10-09 | 青岛海尔股份有限公司 | Refrigerator and its compressor frequency control method |
| CN108626935B (en) * | 2018-05-18 | 2020-12-22 | 青岛海尔股份有限公司 | Refrigerator and compressor frequency control method thereof |
| CN110487020A (en) * | 2019-08-26 | 2019-11-22 | 河南新飞制冷器具有限公司 | Frequency conversion refrigerator control method for frequency |
| CN110487020B (en) * | 2019-08-26 | 2021-03-26 | 河南新飞制冷器具有限公司 | Frequency control method for frequency conversion refrigerator |
| CN111336707A (en) * | 2020-02-29 | 2020-06-26 | 同济大学 | Carbon dioxide heat pump heating system with topologic homoembryo circulation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1259536C (en) | 2006-06-14 |
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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: 20060614 |