CN104729163B - Air-conditioning system and its defrosting control method - Google Patents

Air-conditioning system and its defrosting control method Download PDF

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Publication number
CN104729163B
CN104729163B CN201310729030.1A CN201310729030A CN104729163B CN 104729163 B CN104729163 B CN 104729163B CN 201310729030 A CN201310729030 A CN 201310729030A CN 104729163 B CN104729163 B CN 104729163B
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CN
China
Prior art keywords
conditioning
air
heat exchanger
expansion valve
electric expansion
Prior art date
Application number
CN201310729030.1A
Other languages
Chinese (zh)
Other versions
CN104729163A (en
Inventor
郭晓峰
朱波
曹勇
何国军
Original Assignee
珠海格力电器股份有限公司
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Priority to CN201310729030.1A priority Critical patent/CN104729163B/en
Publication of CN104729163A publication Critical patent/CN104729163A/en
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Publication of CN104729163B publication Critical patent/CN104729163B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B13/00Compression machines, plant or systems with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/26Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02Defrosting cycles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plant or systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/025Compression machines, plant, or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • F25B2313/0253Compression machines, plant, or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements
    • F25B2313/02532Compression machines, plant, or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements during defrosting
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention provides a kind of air-conditioning system and its defrosting control method.Air-conditioning system of the invention, including compressor, four-way valve, indoor heat exchanger and the outdoor heat exchanger being sequentially communicated;The first port of four-way valve is connected with the outlet of compressor;The second port of four-way valve is connected with the first end of indoor heat exchanger;3rd port of four-way valve is connected with the entrance of compressor;3rd port of four-way 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 include auxiliary heat-exchanging loop, auxiliary heat-exchanging loop includes the supplementary heat exchanger being arranged in parallel with outdoor heat exchanger;First electric expansion valve and the second electric expansion valve, are arranged on auxiliary heat-exchanging loop, the two ends of the first electric expansion valve and the second electric expansion valve setting supplementary heat exchanger.The present invention reaches quick defrost and has no effect on the purpose of room temperature, while improve defrost efficiency by increasing auxiliary heat-exchanging loop.

Description

Air-conditioning system and its defrosting control method
Technical field
The present invention relates to field of air conditioning, especially, it is related to a kind of air-conditioning system and its defrosting control method.
Background technology
Substantially the reverse defrost of four-way valve or hot gas are all used during the air cooling air conditioner device winter defrost sold currently on the market Bypass auxiliary defrost.Air-conditioner turns refrigeration mode during using reverse defrost carries out defrost, can not heat within a certain period of time, causes Indoor temperature reduction, the satisfaction that influence client uses;During using hot-gas bypass defrost, system is needed a part of high-temperature gas Condenser inlet is exhausted directly to, condenser inlet temperature is improved and is realized defrost, the height of the machine of getting in can be caused in this case Warm gas flow is reduced, and reduces indoor set leaving air temp, and causes the efficiency of system to reduce, at the same time this kind of defrost mode Directly mix to improve refrigerant temperature with low temperature refrigerant to realize defrost for high temperature refrigerant, defrost is less efficient.
The content of the invention
Present invention aim at providing a kind of air-conditioning system and its defrosting control method, with solve during defrost room temperature reduction compared with Big technical problem.
To achieve the above object, the invention provides a kind of air-conditioning system, including be sequentially communicated compressor, four-way valve, Indoor heat exchanger and outdoor heat exchanger;The first port of four-way valve is connected with the outlet of compressor;The second port of four-way valve It is connected with the first end of indoor heat exchanger;3rd port of four-way valve is connected with the entrance of compressor;The 3rd of four-way valve Port 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 section Stream valve;Also include auxiliary heat-exchanging loop, auxiliary heat-exchanging loop includes the supplementary heat exchanger being arranged in parallel with outdoor heat exchanger;First Electric expansion valve and the second electric expansion valve, are arranged on auxiliary heat-exchanging loop, the first electric expansion valve and the second electronic expansion Valve is arranged on the two ends of supplementary heat exchanger.
Further, air-conditioning system also includes controller, the break-make in control auxiliary heat-exchanging loop.
Further, air-conditioning system also includes outdoor temperature sensor, is electrically connected with the controller.
Further, air-conditioning system also includes line temperature sensor, is electrically connected with the controller.
Further, the one end in auxiliary heat-exchanging loop is connected to the pipeline between the second end of indoor heat exchanger and choke valve On.
Present invention also offers the defrosting control method of air-conditioning system, it is characterised in that obtain the Working mould of air-conditioning system Formula;Judge whether mode of operation is heating mode, if it is, whether detection air-conditioning system needs defrost, if air-conditioning needs The first electric expansion valve and the second electric expansion valve are then opened in defrost, and auxiliary heat-exchanging loop carries out defrost operation.
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, auxiliary heat-exchanging loop carries out condensation work.
Further, when defrost runs, the first electric expansion valve plays throttling action, and the second electric expansion valve plays regulating flow Effect.
Further, during heating operation, the first electronic expansion valve opening is maximum, and the second electric expansion valve plays throttling action.
The invention has the advantages that:
By increasing auxiliary heat-exchanging loop, in defrost, the supplementary heat exchanger in auxiliary heat-exchanging loop carries out auxiliary heat-exchanging, reaches The purpose of room temperature is had no effect on to quick defrost, while improve defrost efficiency.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages. Below with reference to figure, the present invention is further detailed explanation.
Brief description of the drawings
The accompanying drawing for constituting the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention Apply example and its illustrate, for explaining the present invention, not constitute inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of air-conditioning system of the invention;And
Fig. 2 is the defrosting control schematic flow sheet of air-conditioning system of the invention.
Reference in accompanying drawing is as follows:10th, compressor;20th, four-way valve;30th, indoor heat exchanger;40th, outdoor heat exchanger; 50th, supplementary heat exchanger;60th, controller;71st, outdoor temperature sensor;72nd, line temperature sensor;81st, the first electronic expansion Valve;82nd, the second electric expansion valve;90th, choke valve;100th, gas-liquid separator.
Specific embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can be defined by the claims Multitude of different ways with covering is implemented.
Referring to Fig. 1, air-conditioning system of the invention, including compressor 10, four-way valve 20, the indoor heat exchange being sequentially communicated Device 30 and outdoor heat exchanger 40;The first port of four-way valve 20 is connected with the outlet of compressor 10;Second end of four-way valve 20 Mouth is connected with the first end of indoor heat exchanger 30;3rd port of four-way valve 20 is connected with the entrance of compressor 10;Four-way 3rd port of valve 20 is connected with the first end of outdoor heat exchanger 40;Second end of indoor heat exchanger 30 and outdoor heat exchanger 40 The second end be provided with choke valve 90;Also include auxiliary heat-exchanging loop, auxiliary heat-exchanging loop includes in parallel with outdoor heat exchanger 40 The supplementary heat exchanger 50 of setting;First electric expansion valve 81 and the second electric expansion valve 82, are arranged on auxiliary heat-exchanging loop, the One electric expansion valve 81 and the second electric expansion valve 82 are arranged on the two ends of supplementary heat exchanger 50.Returned by increasing auxiliary heat-exchanging Road, in defrost, the supplementary heat exchanger in auxiliary heat-exchanging loop carries out auxiliary heat-exchanging, reaches the mesh that quick defrost has no effect on room temperature , while improve defrost efficiency.
Air-conditioning system also includes controller 60, the break-make in control auxiliary heat-exchanging loop.Air-conditioning system also includes outdoor temperature Sensor 71, electrically connects with controller 60.Air-conditioning system also includes line temperature sensor 72, is electrically connected with controller 60.The One electric expansion valve 81 and the second electric expansion valve 82 are connected with controller 60, and controlled device 60 is controlled.Auxiliary heat-exchanging is returned The one end on road is connected on the pipeline between the second end of indoor heat exchanger 30 and choke valve 90.3rd end of four-way valve 20 and pressure Gas-liquid separator 100 is provided between the entrance of contracting machine 10.
Air-conditioning system of the invention constitutes auxiliary heat-exchanging loop, same time control by Design assistant heat exchanger, electric expansion valve Device processed 60 detects environment temperature and condenser pipe temperature, electronics by outdoor temperature sensor 71 and line temperature sensor 72 Expansion valve is connected with controller 60, and controlled device 60 is controlled.The arrangement of outdoor temperature sensor is as follows:In outer machine guard Temperature sensor frame is provided with, temperature sensor is then stuck on temperature sensor frame and is pricked with line and is fixed, while in outer machine Line temperature sensor 72 is set on heat exchanger, and two temperatures sensor is connected on controller 60.
Referring to Fig. 2, the defrosting control method of air-conditioning system of the invention obtains the mode of operation of air-conditioning system;Sentence Whether disconnected mode of operation is heating mode, if it is, whether detection air-conditioning system needs defrost, if air-conditioning needs defrost The first electric expansion valve 81 and the second electric expansion valve 82 are opened, auxiliary heat-exchanging loop carries out defrost operation.
When air-conditioning system does not need defrost, auxiliary heat-exchanging loop carries out heating work.When air-conditioning system be in refrigeration or When under dehumidification mode, auxiliary heat-exchanging loop carries out condensation work.Judging whether to need defrost includes:If the pipeline reality of refrigerant Temperature is more than environment temperature with design temperature difference, then need defrost.When defrost runs, the throttling of the first electric expansion valve 81 is made With the second electric expansion valve 82 plays regulating flow.During heating operation, the aperture of the first electric expansion valve 81 is maximum, and second 82 throttling actions of electric expansion valve.
Specific control mode is as follows:
After system boot, four-way valve 20 commutates, and system performs heat-production functions, and during heating mode, controller 60 detects outdoor Temperature sensor 71, line temperature sensor 72 obtain environment temperature T and line temperature T ', by judging environment temperature T places Interval, provides line temperature setting value T1, and calculates △ T=T '-T1, and comparing △ T and T every the t time periods sets, and performs as follows Operation:
When △ T > T settings, now show that outdoor heat exchanger pipe temperature is of a relatively high, surface is frostless, and 1# electric expansion valves are complete Open, 2# electric expansion valves are adjusted to set aperture B1, and now 2# electric expansion valves play throttling action, and auxiliary defrosting system performs system Hot merit energy;
When △ T≤T settings, now show that outside heat exchanger, close to or up frosting temperature, now needs defrosting in time, 1# electric expansion valves are adjusted to setting aperture B2,2# electric expansion valve and are adjusted to set aperture B3, and now 1# plays throttling action, 2# Electric expansion valve plays regulating flow, and auxiliary defrosting system performs defrosting function;
Under refrigeration, dehumidification mode, 1# electric expansion valve standard-sized sheets, 2# electric expansion valves are adjusted to set aperture B1, now 2# Electric expansion valve plays throttling action, and auxiliary defrosting system performs condensation function;Under other patterns, this logic is not detected.
As can be seen from the above description, the above embodiments of the present invention realize following technique effect:
Auxiliary heat-exchanging loop is constituted by Design assistant heat exchanger, electric expansion valve, when reaching quick defrost and defrost not The purpose of room temperature is influenceed, enables a customer to obtain satisfaction higher, realize not reducing system during heat pump air conditioner unit running pipeline frost Heat, makes the experience that customer acquisition is higher, improves the competitiveness of product in market.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (10)

1. a kind of air-conditioning system, it is characterised in that including:Compressor (10), four-way valve (20), the indoor heat exchanger being sequentially communicated And outdoor heat exchanger (40) (30);The first port of the four-way valve (20) is connected with the outlet of the compressor (10);Institute The second port for stating four-way valve (20) is connected with the first end of the indoor heat exchanger (30);The 3rd of the four-way valve (20) Port is connected with the entrance of the compressor (10);3rd port and the outdoor heat exchanger (40) of the four-way valve (20) First end be connected;
Second end of the indoor heat exchanger (30) and the second end of the outdoor heat exchanger (40) are provided with choke valve (90);
Also include auxiliary heat-exchanging loop, the auxiliary heat-exchanging loop includes the auxiliary being arranged in parallel with the outdoor heat exchanger (40) Heat exchanger (50);
First electric expansion valve (81) and the second electric expansion valve (82), are arranged on the auxiliary heat-exchanging loop, described first Electric expansion valve (81) and second electric expansion valve (82) are arranged on the two ends of the supplementary heat exchanger (50), wherein, change During frost operation, first electric expansion valve (81) plays throttling action, and second electric expansion valve (82) plays regulating flow Effect;During heating operation, the first electric expansion valve (81) aperture is maximum, and second electric expansion valve (82) is played throttling and made With.
2. air-conditioning system according to claim 1, it is characterised in that also including controller (60), controls the auxiliary to change The break-make of hot loop.
3. air-conditioning system according to claim 2, it is characterised in that also including outdoor temperature sensor (71), it is and described Controller (60) is electrically connected.
4. air-conditioning system according to claim 2, it is characterised in that also including line temperature sensor (72), it is and described Controller (60) is electrically connected.
5. air-conditioning system according to claim 1, it is characterised in that the one end in the auxiliary heat-exchanging loop is connected to described On pipeline between second end of indoor heat exchanger (30) and the choke valve (90).
6. a kind of defrosting control method of air-conditioning system, it is characterised in that the air-conditioning system is any in claim 1 to 5 Air-conditioning system described in, the defrosting control method includes,
Obtain the mode of operation of air-conditioning system;
Judge whether the mode of operation is heating mode, if it is, whether detection air-conditioning system needs defrost, if air-conditioning Defrost is needed then to open the first electric expansion valve (81) and the second electric expansion valve (82), auxiliary heat-exchanging loop carries out defrost fortune OK.
7. defrosting control method according to claim 6, it is characterised in that described when air-conditioning system does not need defrost Auxiliary heat-exchanging loop carries out heating work.
8. defrosting control method according to claim 6, it is characterised in that when air-conditioning system is in refrigeration or dehumidification mode When lower, the auxiliary heat-exchanging loop carries out condensation work.
9. defrosting control method according to claim 6, it is characterised in that when defrost runs, first electronic expansion Valve (81) plays throttling action, and second electric expansion valve (82) plays regulating flow.
10. defrosting control method according to claim 7, it is characterised in that during heating operation, first electronic expansion Valve (81) aperture is maximum, and second electric expansion valve (82) plays throttling action.
CN201310729030.1A 2013-12-24 2013-12-24 Air-conditioning system and its defrosting control method CN104729163B (en)

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

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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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CN104729163B true CN104729163B (en) 2017-06-06

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Cited By (1)

* Cited by examiner, † Cited by third party
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
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

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CN101487642B (en) * 2008-11-14 2011-08-17 广东美的电器股份有限公司 Heat pump
CN202032788U (en) * 2011-04-05 2011-11-09 Tcl空调器(中山)有限公司 Air conditioner hot water machine
EP2420767A2 (en) * 2010-06-24 2012-02-22 Mitsubishi Heavy Industries Heat-pump hot water supply and air conditioning apparatus
CN101788206B (en) * 2009-07-03 2012-11-07 曾华文 Outdoor double heat exchanger defrosting low-temperature heating system

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Publication number Priority date Publication date Assignee Title
EP1876402A2 (en) * 2006-07-05 2008-01-09 Markus Kroll Heat pump with temperature control unit
CN101487642B (en) * 2008-11-14 2011-08-17 广东美的电器股份有限公司 Heat pump
CN101788206B (en) * 2009-07-03 2012-11-07 曾华文 Outdoor double heat exchanger defrosting low-temperature heating system
EP2420767A2 (en) * 2010-06-24 2012-02-22 Mitsubishi Heavy Industries Heat-pump hot water supply and air conditioning apparatus
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* Cited by examiner, † Cited by third party
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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