CN104729163A - Air conditioning system and defrosting control method thereof - Google Patents
Air conditioning system and defrosting control method thereof Download PDFInfo
- Publication number
- CN104729163A CN104729163A CN201310729030.1A CN201310729030A CN104729163A CN 104729163 A CN104729163 A CN 104729163A CN 201310729030 A CN201310729030 A CN 201310729030A CN 104729163 A CN104729163 A CN 104729163A
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- China
- Prior art keywords
- heat exchanger
- conditioning system
- expansion valve
- air
- electric expansion
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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
- F25B13/00—Compression machines, plants or systems, with 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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
- F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements
- F25B2313/02532—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements during defrosting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides an air conditioning system and a defrosting control method thereof. The air conditioning system comprises a compressor, a four-way vale, an indoor heat exchanger, an outdoor heat exchanger, an auxiliary heat exchange loop, a first electronic expansion valve and a second electronic expansion valve, wherein the compressor, the four-way valve, the indoor heat exchanger and the outdoor heat exchanger are communicated in sequence, a first port of the four-way valve is communicated with an outlet of the compressor, a second port of the four-way valve is communicated with the first end of the indoor heat exchanger, a third port of the four-way valve is communicated with an inlet of the compressor, a fourth port of the four-way valve is communicated with the first end of the outdoor heat exchanger, the second end of each of the indoor heat exchanger and the outdoor heat exchanger is provided with a throttling valve, the auxiliary heat exchange loop comprises an auxiliary heat exchanger which is arranged parallelly to the outdoor heat exchanger, and the first electronic expansion valve and the second electronic expansion valve are arranged on the auxiliary heat exchange loop and at two ends of the auxiliary heat exchanger. The air conditioning system and the defrosting control method thereof have the advantages that by adding the auxiliary heat exchange loop, quick defrosting is achieved without affecting indoor temperature, and defrosting efficiency is improved.
Description
Technical field
The present invention relates to field of air conditioning, especially, relate to a kind of air-conditioning system and defrosting control method thereof.
Background technology
Substantially the reverse defrost of cross valve or hot-gas bypass is all adopted to assist defrost during now commercially sold air cooling air conditioner device defrost in winter.When adopting reverse defrost, air-conditioner turns refrigeration mode and carries out defrost, can not heat within a certain period of time, cause indoor temperature to reduce, and affects the satisfaction that client uses; When adopting hot-gas bypass defrost, system needs a part of high-temperature gas to be directly discharged to condenser inlet, improve condenser inlet temperature and realize defrost, in this case the high-temperature gas flow entering indoor set can be caused to reduce, reduce indoor set leaving air temp, and cause the efficiency of system to reduce, meanwhile this kind of defrost mode is that high temperature refrigerant directly mixes with low temperature refrigerant and improves refrigerant temperature, realize defrost, defrost efficiency is lower.
Summary of the invention
The object of the invention is to provide a kind of air-conditioning system and defrosting control method thereof, and during to solve defrost, room temperature reduces larger technical problem.
For achieving the above object, the invention provides a kind of air-conditioning system, comprise the compressor, cross valve, indoor heat exchanger and the outdoor heat exchanger that are communicated with successively; First port of cross valve is connected with the outlet of compressor; Second port of cross valve is connected with the first end of indoor heat exchanger; 3rd port of cross valve is connected with the entrance of compressor; 3rd port of cross valve is connected with the first end of outdoor heat exchanger; Second end of indoor heat exchanger and the second end of outdoor heat exchanger are provided with choke valve; Also comprise auxiliary heat-exchanging loop, auxiliary heat-exchanging loop comprises the supplementary heat exchanger be arranged in parallel with outdoor heat exchanger; First electric expansion valve and the second electric expansion valve, be arranged on auxiliary heat-exchanging loop, and the first electric expansion valve and the second electric expansion valve are arranged on the two ends of supplementary heat exchanger.
Further, air-conditioning system also comprises controller, controls the break-make in auxiliary heat-exchanging loop.
Further, air-conditioning system also comprises outdoor temperature sensor, is electrically connected with controller.
Further, air-conditioning system also comprises line temperature sensor, is electrically connected with controller.
Further, the one end in auxiliary heat-exchanging loop is connected on the pipeline between the second end of indoor heat exchanger and choke valve.
Present invention also offers the defrosting control method of air-conditioning system, it is characterized in that, obtain the mode of operation of air-conditioning system; Judge whether mode of operation is heating mode, if so, then detect air-conditioning system the need of defrost, if air-conditioning needs defrost, open the first electric expansion valve and the second electric expansion valve, defrost operation is carried out in auxiliary heat-exchanging loop.
Further, when air-conditioning system does not need defrost, auxiliary heat-exchanging loop carries out heating work.
Further, when air-conditioning system is under refrigeration or dehumidification mode, condensation work is carried out in auxiliary heat-exchanging loop.
Further, when defrost runs, the first electric expansion valve plays throttling action, and the second electric expansion valve plays regulating flow.
Further, during heating operation, the first electronic expansion valve opening is maximum, and the second electric expansion valve plays throttling action.
The present invention has following beneficial effect:
By increasing auxiliary heat-exchanging loop, when defrost, the supplementary heat exchanger in auxiliary heat-exchanging loop carries out auxiliary heat-exchanging, reaches the object that quick defrost does not affect room temperature, improves defrost efficiency simultaneously.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to air-conditioning system of the present invention; And
Fig. 2 is the defrosting control schematic flow sheet according to air-conditioning system of the present invention.
Reference numeral in accompanying drawing is as follows: 10, compressor; 20, cross valve; 30, indoor heat exchanger; 40, outdoor heat exchanger; 50, supplementary heat exchanger; 60, controller; 71, outdoor temperature sensor; 72, line temperature sensor; 81, the first electric expansion valve; 82, the second electric expansion valve; 90, choke valve; 100, gas-liquid separator.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
See Fig. 1, according to air-conditioning system of the present invention, comprise the compressor 10, cross valve 20, indoor heat exchanger 30 and the outdoor heat exchanger 40 that are communicated with successively; First port of cross valve 20 is connected with the outlet of compressor 10; Second port of cross valve 20 is connected with the first end of indoor heat exchanger 30; 3rd port of cross valve 20 is connected with the entrance of compressor 10; 3rd port of cross valve 20 is connected with the first end of outdoor heat exchanger 40; Second end of indoor heat exchanger 30 and the second end of outdoor heat exchanger 40 are provided with choke valve 90; Also comprise auxiliary heat-exchanging loop, auxiliary heat-exchanging loop comprises the supplementary heat exchanger 50 be arranged in parallel with outdoor heat exchanger 40; First electric expansion valve 81 and the second electric expansion valve 82, is arranged on auxiliary heat-exchanging loop, and the first electric expansion valve 81 and the second electric expansion valve 82 are arranged on the two ends of supplementary heat exchanger 50.By increasing auxiliary heat-exchanging loop, when defrost, the supplementary heat exchanger in auxiliary heat-exchanging loop carries out auxiliary heat-exchanging, reaches the object that quick defrost does not affect room temperature, improves defrost efficiency simultaneously.
Air-conditioning system also comprises controller 60, controls the break-make in auxiliary heat-exchanging loop.Air-conditioning system also comprises outdoor temperature sensor 71, is electrically connected with controller 60.Air-conditioning system also comprises line temperature sensor 72, is electrically connected with controller 60.First electric expansion valve 81 is all connected with controller 60 with the second electric expansion valve 82, and controlled device 60 controls.The one end in auxiliary heat-exchanging loop is connected on the pipeline between the second end of indoor heat exchanger 30 and choke valve 90.Gas-liquid separator 100 is provided with between 3rd end of cross valve 20 and the entrance of compressor 10.
Air-conditioning system of the present invention is by Design assistant heat exchanger, electric expansion valve composition auxiliary heat-exchanging loop, with Time Controller 60 by outdoor temperature sensor 71 and line temperature sensor 72 testing environment temperature and condenser pipe temperature, electric expansion valve is connected with controller 60, and controlled device 60 controls.The arrangement of outdoor temperature sensor is as follows: machine guard is provided with temperature sensor frame outside, temperature sensor to be then stuck on temperature sensor frame and to prick with line and is fixed, simultaneously outside machine heat exchanger arranges line temperature sensor 72, two temperatures sensor is connected on controller 60.
See Fig. 2, according to the defrosting control method of air-conditioning system of the present invention, obtain the mode of operation of air-conditioning system; Judge whether mode of operation is heating mode, if so, then detect air-conditioning system the need of defrost, if air-conditioning needs defrost, open the first electric expansion valve 81 and the second electric expansion valve 82, defrost operation is carried out in auxiliary heat-exchanging loop.
When air-conditioning system does not need defrost, auxiliary heat-exchanging loop carries out heating work.When air-conditioning system is under refrigeration or dehumidification mode, condensation work is carried out in auxiliary heat-exchanging loop.Judge whether to need defrost to comprise: if the pipeline actual temperature of refrigerant and design temperature difference are greater than environment temperature, then need defrost.When defrost runs, the first electric expansion valve 81 throttling action, the second electric expansion valve 82 plays regulating flow.During heating operation, the first electric expansion valve 81 aperture is maximum, the second electric expansion valve 82 throttling action.
Concrete control mode is as follows:
After system boot, cross valve 20 commutates, system performs heat-production functions, during heating mode, controller 60 detects outdoor temperature sensor 71, line temperature sensor 72 obtains environment temperature T and line temperature T ', by judging between environment temperature T location, provide line temperature setting value T1, and calculate △ T=T '-T1, compare △ T and T every the t time period and set, perform and operate as follows:
When △ T > T sets, now show that outdoor heat exchanger Guan Wen is relatively high, surface is frostless, 1# electric expansion valve standard-sized sheet, 2# electric expansion valve adjusts to setting aperture B1, and now 2# electric expansion valve plays throttling action, and auxiliary defrosting system performs heat-production functions;
When △ T≤T sets, now show that outside heat exchanger is close or reach frosting temperature, now need timely defrosting, 1# electric expansion valve adjusts to setting aperture B2,2# electric expansion valve adjusts to setting aperture B3, now 1# plays throttling action, and 2# electric expansion valve plays regulating flow, and auxiliary defrosting system performs defrost function;
Under refrigeration, dehumidification mode, 1# electric expansion valve standard-sized sheet, 2# electric expansion valve adjusts to setting aperture B1, and now 2# electric expansion valve plays throttling action, and auxiliary defrosting system performs condensation function; Under other patterns, do not detect this logic.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
By Design assistant heat exchanger, electric expansion valve composition auxiliary heat-exchanging loop, the object of room temperature is not affected when reaching quick defrost and defrost, client is enable to obtain higher satisfaction, heating capacity is not reduced when realizing heat pump air conditioner unit running pipeline frost, make the experience that customer acquisition is higher, improve the competitiveness of product in market.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an air-conditioning system, is characterized in that, comprising: the compressor (10) be communicated with successively, cross valve (20), indoor heat exchanger (30) and outdoor heat exchanger (40); First port of described cross valve (20) is connected with the outlet of described compressor (10); Second port of described cross valve (20) is connected with the first end of described indoor heat exchanger (30); 3rd port of described cross valve (20) is connected with the entrance of described compressor (10); 3rd port of described cross valve (20) is connected with the first end of described outdoor heat exchanger (40);
Second end of described indoor heat exchanger (30) and the second end of described outdoor heat exchanger (40) are provided with choke valve (90);
Also comprise auxiliary heat-exchanging loop, described auxiliary heat-exchanging loop comprises the supplementary heat exchanger (50) be arranged in parallel with described outdoor heat exchanger (40);
First electric expansion valve (81) and the second electric expansion valve (82), be arranged on described auxiliary heat-exchanging loop, and described first electric expansion valve (81) and described second electric expansion valve (82) are arranged on the two ends of described supplementary heat exchanger (50).
2. air-conditioning system according to claim 1, is characterized in that, also comprises controller (60), controls the break-make in described auxiliary heat-exchanging loop.
3. air-conditioning system according to claim 2, is characterized in that, also comprises outdoor temperature sensor (71), is electrically connected with described controller (60).
4. air-conditioning system according to claim 2, is characterized in that, also comprises line temperature sensor (72), is electrically connected with described controller (60).
5. air-conditioning system according to claim 1, is characterized in that, the one end in described auxiliary heat-exchanging loop is connected on the pipeline between the second end of described indoor heat exchanger (30) and described choke valve (90).
6. a defrosting control method for air-conditioning system, is characterized in that,
Obtain the mode of operation of air-conditioning system;
Judge whether described mode of operation is heating mode, if so, then detect air-conditioning system the need of defrost, if air-conditioning needs defrost, open the first electric expansion valve (81) and the second electric expansion valve (82), defrost operation is carried out in auxiliary heat-exchanging loop.
7. defrosting control method according to claim 6, is characterized in that, when air-conditioning system does not need defrost, described auxiliary heat-exchanging loop carries out heating work.
8. defrosting control method according to claim 6, is characterized in that, when air-conditioning system is under refrigeration or dehumidification mode, condensation work is carried out in described auxiliary heat-exchanging loop.
9. defrosting control method according to claim 6, is characterized in that, when defrost runs, described first electric expansion valve (81) plays throttling action, and described second electric expansion valve (82) plays regulating flow.
10. defrosting control method according to claim 7, is characterized in that, during heating operation, described first electric expansion valve (81) aperture is maximum, and described second electric expansion valve (82) plays throttling action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310729030.1A CN104729163B (en) | 2013-12-24 | 2013-12-24 | Air-conditioning system and its defrosting control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310729030.1A CN104729163B (en) | 2013-12-24 | 2013-12-24 | Air-conditioning system and its defrosting control method |
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| Publication Number | Publication Date |
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| CN104729163A true CN104729163A (en) | 2015-06-24 |
| CN104729163B CN104729163B (en) | 2017-06-06 |
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| CN201310729030.1A Active CN104729163B (en) | 2013-12-24 | 2013-12-24 | Air-conditioning system and its defrosting control method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258408A (en) * | 2015-10-08 | 2016-01-20 | Tcl空调器(中山)有限公司 | Air conditioner and defrosting method for air conditioner |
| CN105865082A (en) * | 2016-04-20 | 2016-08-17 | 河北炫坤节能科技股份有限公司 | Modular air-cooled cold and hot water anti-icing unit |
| CN108007016A (en) * | 2017-10-30 | 2018-05-08 | 珠海格力电器股份有限公司 | The control method of heat pump system and heat pump system |
| CN110411085A (en) * | 2019-08-26 | 2019-11-05 | 珠海格力电器股份有限公司 | Antifreeze heat-exchanging component and air-conditioning defrosting system |
| CN111059732A (en) * | 2019-12-30 | 2020-04-24 | Tcl空调器(中山)有限公司 | Air conditioner and control method thereof |
| CN112229116A (en) * | 2020-10-15 | 2021-01-15 | 珠海格力电器股份有限公司 | Air source heat pump unit defrosting control method and device and air conditioning system |
| CN112696839A (en) * | 2019-10-18 | 2021-04-23 | 广东美的制冷设备有限公司 | Air conditioning system, air conditioner and control method and control device of air conditioner |
| CN112880131A (en) * | 2021-01-29 | 2021-06-01 | 青岛海尔空调器有限总公司 | Method and device for defrosting control of air conditioning system and air conditioning system |
| CN114034093A (en) * | 2021-11-09 | 2022-02-11 | 珠海格力电器股份有限公司 | Air conditioning system and air conditioner adaptable to abnormal environment temperature |
| CN114838538A (en) * | 2022-05-10 | 2022-08-02 | Tcl空调器(中山)有限公司 | Air conditioner defrosting system and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108168041A (en) * | 2018-03-01 | 2018-06-15 | 李小红 | A kind of air-conditioning defrosting device and its defrosting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105258408A (en) * | 2015-10-08 | 2016-01-20 | Tcl空调器(中山)有限公司 | Air conditioner and defrosting method for air conditioner |
| CN105865082A (en) * | 2016-04-20 | 2016-08-17 | 河北炫坤节能科技股份有限公司 | Modular air-cooled cold and hot water anti-icing unit |
| CN108007016A (en) * | 2017-10-30 | 2018-05-08 | 珠海格力电器股份有限公司 | The control method of heat pump system and heat pump system |
| CN110411085A (en) * | 2019-08-26 | 2019-11-05 | 珠海格力电器股份有限公司 | Antifreeze heat-exchanging component and air-conditioning defrosting system |
| CN112696839A (en) * | 2019-10-18 | 2021-04-23 | 广东美的制冷设备有限公司 | Air conditioning system, air conditioner and control method and control device of air conditioner |
| CN111059732A (en) * | 2019-12-30 | 2020-04-24 | Tcl空调器(中山)有限公司 | Air conditioner and control method thereof |
| CN112229116A (en) * | 2020-10-15 | 2021-01-15 | 珠海格力电器股份有限公司 | Air source heat pump unit defrosting control method and device and air conditioning system |
| CN112880131A (en) * | 2021-01-29 | 2021-06-01 | 青岛海尔空调器有限总公司 | Method and device for defrosting control of air conditioning system and air conditioning system |
| CN114034093A (en) * | 2021-11-09 | 2022-02-11 | 珠海格力电器股份有限公司 | Air conditioning system and air conditioner adaptable to abnormal environment temperature |
| CN114838538A (en) * | 2022-05-10 | 2022-08-02 | Tcl空调器(中山)有限公司 | Air conditioner defrosting system and method |
| CN114838538B (en) * | 2022-05-10 | 2024-03-12 | Tcl空调器(中山)有限公司 | Defrosting system and method for air conditioner |
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| CN104729163B (en) | 2017-06-06 |
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