CN104296245A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN104296245A CN104296245A CN201410539476.2A CN201410539476A CN104296245A CN 104296245 A CN104296245 A CN 104296245A CN 201410539476 A CN201410539476 A CN 201410539476A CN 104296245 A CN104296245 A CN 104296245A
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/67—Switching between heating and cooling modes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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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
- F25B19/00—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour
- F25B19/02—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour using fluid jet, e.g. of steam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
- 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
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using 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
- F25B2700/2116—Temperatures of a condenser
- F25B2700/21163—Temperatures of a condenser of the refrigerant at the outlet of the condenser
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Signal Processing (AREA)
- Sustainable Development (AREA)
- Atmospheric Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
An air conditioner and a control method are provided to inject the optimum amount of refrigerant with a sensor for detecting superheating degree and supercooling degree. CONSTITUTION: An air conditioner comprises: a compressor(10); a first heat exchanger(30) which heat-exchanges and condenses refrigerant which is discharged from the compressor; a first valve which branches off the refrigerant from the first heat exchanger and depressurizes and expands the refrigerant; a second heat exchanger(70) which heat-exchanges the expended refrigerant with condensed refrigerant and sprays the heat-exchanged refrigerant to the compressor; and a controller which detects the superheating degree of the sprayed refrigerant and controls the amount of refrigerant by controlling the opening ratio of the first valve according to the superheating degree of the refrigerant.
Description
The divisional application that the application is the applying date is on May 27th, 2009, application number is the application for a patent for invention " air conditioner and control method thereof " of 200910203600.7.
Technical field
The present invention relates to a kind of air conditioner and the control method thereof with steam ejection compression system, particularly relate to air conditioner and control method thereof that the refrigerant amount sprayed when cooling and warming can be run is adjusted to optimal dose.
Background technology
Usually, heat is delivered to low temperature side naturally from high temperature side, but to heat is delivered to high temperature side from low temperature side, then needs to apply certain effect from outside.Here it is heat pump principle.Heat-pump air-conditioner is undertaken freezing or heating operation by reversibly utilizing the transport mechanism (mechanism) of the heat circulated in the cooling cycle system that is made up of the compression of cold-producing medium, condensation, expansion, evaporation, and has the compressor for compressed refrigerant.
Recently, in order to improve refrigerating capacity and the heating capacity of this heat-pump air-conditioner, introducing steam injection (Vapor Injection) compressibility spraying gaseous refrigerant to compressor (being specially discharge chambe).Steam ejection compression system is connected to by the branch's pipe arrangement formed by the pipe arrangement branch between indoor heat converter and outdoor heat converter the ejection end being located at compressor, this branch's pipe arrangement is arranged and is used for the injection expansion valve of swell refrigeration agent and the supercooling heat exchanger (hereinafter referred to as subcooler) for making the cold-producing medium of expansion carry out heat exchange, carry out heat exchange to after the cold-producing medium puffing of shunting accordingly, and then make overheated gaseous refrigerant be ejected into the ejection end of compressor.Accordingly, overcoming the restricted gender according to being drawn into the refrigerant density of compressor and discharge chambe volume and confined cold-producing medium soakage, improving the compressed capability of compressor thus, thus increase refrigerant amount capable of circulation and improve refrigeration and heating operation performance.
But, when the degree of superheat of the cold-producing medium that this steam ejection compression system is sprayed when heating operation is higher, overheat of compressor and ineffective systems can be caused, and when the degree of superheat is lower, liquid refrigerant can flow into compressor and compressor is caused unfavorable.Further, when the degree of supercooling of cold-producing medium is higher during refrigerating operaton, in Super long tube, the pressure loss occurs, circulating mass of refrigerant reduces and reduces refrigeration performance accordingly.
Summary of the invention
The present invention proposes to solve the problem, and the object of the present invention is to provide a kind ofly to have in the air conditioner of steam ejection compression system air conditioner and the control method thereof that the refrigerant amount ejected when refrigerating operaton and heating operation is adjusted to optimal dose by the sensor be equipped with for being detected temperature and degree of supercooling.
To achieve these goals, comprise according to the air conditioner of the embodiment of the present invention: compressor; Heat exchange is carried out with the indoor heat converter of this cold-producing medium of condensation to the cold-producing medium of discharging from described compressor; Be connected to described compressor by pipe arrangement and heat exchange is carried out to evaporate the outdoor heat converter of this cold-producing medium to the cold-producing medium received from described indoor heat converter; After shunting the cold-producing medium carried from described indoor heat converter, it is carried out to the injection expansion valve of puffing; Make the cold-producing medium of the cold-producing medium of described expansion and described condensation carry out heat exchange and be ejected into the subcooler of described compressor; The degree of superheat of the cold-producing medium that the degree of superheat detecting the cold-producing medium of described injection also detects described in basis regulates the aperture of described injection expansion valve and controls the control part of the amount of the cold-producing medium of described injection.
Described injection expansion valve is arranged on from the pipe arrangement branched out between described indoor heat converter and described outdoor heat converter, and to the backward described subcooler transmission of the cold-producing medium puffing of described shunting.
And, also comprise the test section for the inlet temperature and outlet temperature detecting described subcooler according to the air conditioner of the embodiment of the present invention, described control part detects the degree of superheat of described cold-producing medium by the value of the inlet temperature deducting described subcooler from the outlet temperature of described subcooler.Wherein, described inlet temperature is the temperature of the entrance of the described subcooler that the cold-producing medium of described expansion flows into, and described outlet temperature is the temperature of the outlet of the described subcooler that the cold-producing medium of described injection flows out.
The described degree of superheat detected and first and second degree of superheat of presetting compare and increase or reduce the aperture of described injection expansion valve by described control part, maintain value between first and second degree of superheat described to make the degree of superheat of described cold-producing medium.
Described subcooler is double pipe heat exchanger.
Further, air conditioner comprises in accordance with another embodiment of the present invention: compressor; Heat exchange is carried out with the outdoor heat converter of this cold-producing medium of condensation to the cold-producing medium of discharging from described compressor; Be connected to described compressor by pipe arrangement and heat exchange is carried out to evaporate the indoor heat converter of this cold-producing medium to the cold-producing medium received from described outdoor heat converter; After shunting the cold-producing medium carried from described outdoor heat converter, it is carried out to the injection expansion valve of puffing; Make the cold-producing medium of the cold-producing medium of described expansion and described condensation carry out heat exchange and be ejected into the subcooler of described compressor; The degree of supercooling that the degree of supercooling detecting the outlet of described outdoor heat converter also detects described in basis regulates the aperture of described injection expansion valve and controls the control part of the amount of the cold-producing medium of described injection.
Described injection expansion valve is arranged on from the pipe arrangement branched out between described indoor heat converter and described outdoor heat converter, and is sent to described subcooler to after the cold-producing medium puffing of described shunting.
Further, air conditioner also comprises the pressure sensor of the pressure for detecting described cold-producing medium of discharging from compressor and the temperature sensor for the outlet temperature that detects described outdoor heat converter in accordance with another embodiment of the present invention.Described control part calculates the saturation temperature of the pressure corresponding to the cold-producing medium that described pressure sensor detects, and is detected the degree of supercooling of described cold-producing medium by the value deducting the outlet temperature of described outdoor heat converter from the saturation temperature of the described high pressure calculated.
Described temperature sensor be arranged on connect described subcooler and described indoor heat converter pipe arrangement on, and in described subcooler, to carry out heat exchange and by the temperature of overcooled cold-producing medium for detecting.
The described degree of supercooling that detects and target degree of supercooling compare by described control part, increase or reduce the aperture of described injection expansion valve according to comparative result.
Further, air conditioner also comprises the roundabout valve of injection of the cold-producing medium for roundabout described injection in accordance with another embodiment of the present invention.The roundabout valve of described injection is arranged on from described subcooler and the pipe arrangement that branches out between the ejection end of the described compressor of the cold-producing medium that receives described injection, and for the cold-producing medium of described injection being sent to the suction inlet of described compressor.
Described subcooler is double pipe heat exchanger.
Further, step is comprised according to the control method of the air conditioner of the embodiment of the present invention: by indoor heat converter, heat exchange is carried out and this cold-producing medium of condensation to the cold-producing medium of discharging from compressor; By injection expansion valve, puffing is carried out to a part for the cold-producing medium of described condensation; By subcooler, heat exchange carried out to the cold-producing medium of described expansion and be ejected into described compressor; Detect the degree of superheat of the cold-producing medium of described injection; The aperture of described injection expansion valve is regulated, to control the amount of the cold-producing medium of described injection according to the degree of superheat of the described cold-producing medium detected.
The step of the degree of superheat of described detection cold-producing medium is: the temperature detecting the cold-producing medium of the described expansion of the inlet temperature as described subcooler; Detect described in the outlet temperature as described subcooler by after subcooler heat exchange by the temperature of overheated cold-producing medium; The value of the inlet temperature of described subcooler is deducted to detect the degree of superheat of described cold-producing medium from the outlet temperature of described subcooler.
The described step of amount controlling the cold-producing medium sprayed the degree of superheat of the described cold-producing medium detected is compared with first and second degree of superheat preset and increases or reduce the aperture of described injection expansion valve, maintains value between first and second degree of superheat described to make the degree of superheat of described cold-producing medium.
In addition, the control method of air conditioner comprises step in accordance with another embodiment of the present invention: carry out heat exchange and this cold-producing medium of condensation by outdoor heat converter to the cold-producing medium of discharging from compressor; By injection expansion valve, puffing is carried out to a part for the cold-producing medium of described condensation; By subcooler, heat exchange carried out to the cold-producing medium of described expansion and be ejected into described compressor; Detect the degree of supercooling of the outlet of described outdoor heat converter; The aperture of described injection expansion valve is regulated, to control the amount of the cold-producing medium of described injection according to the described degree of supercooling detected.
The step of described detection degree of supercooling is: the pressure detecting the cold-producing medium of the high pressure of the outlet side of described compressor; Detect as described outdoor heat converter outlet temperature by after described subcooler heat exchange by the temperature of overcooled cold-producing medium; Calculate the saturation temperature of the high pressure of the pressure of the cold-producing medium detected described in corresponding to, detect described degree of supercooling by the value deducting the outlet temperature of described outdoor heat converter from the saturation temperature of the described high pressure calculated.
The described step of amount controlling the cold-producing medium sprayed is compared and increase or reduce the aperture of described injection expansion valve the described degree of supercooling that detects and target degree of supercooling, maintains described target degree of supercooling with the degree of supercooling detected described in making.
Further, the control method of air conditioner also comprises the step of the cold-producing medium of roundabout described injection in accordance with another embodiment of the present invention.The step of the cold-producing medium of described roundabout injection is by being arranged on the suction inlet with roundabout valve, the cold-producing medium of described injection being sent to described compressor from the injection described subcooler and the pipe arrangement that branches out between the ejection end of the described compressor of the cold-producing medium that receives described injection.
As mentioned above, according to embodiments of the invention, the sensor for being detected temperature and degree of supercooling is equipped with in the air conditioner with steam ejection compression system, the degree of supercooling of refrigerating operaton time control refrigeration condenser outlet side thus, and during heating operation, control the degree of superheat of sprayed cold-producing medium, to make to spray the suitableeest refrigerant amount when refrigerating operaton and heating operation, thus under any cooling and warming service condition, all can guarantee the reliability of system.
Accompanying drawing explanation
Fig. 1 is the pie graph with the air conditioner of steam ejection compression system according to the embodiment of the present invention;
Fig. 2 is the pie graph of refrigerant flow direction when heating operation in Fig. 1 is shown;
Fig. 3 is the pie graph of refrigerant flow direction when refrigerating operaton in Fig. 1 is shown;
Fig. 4 is the control pie graph with the air conditioner of steam ejection compression system according to the embodiment of the present invention;
The workflow diagram of control method when Fig. 5 is the heating operation for illustration of the air conditioner according to the embodiment of the present invention;
The workflow diagram of control method when Fig. 6 is the refrigerating operaton for illustration of the air conditioner according to the embodiment of the present invention.
Primary symbols illustrates: 10 is compressor, 13 is ejection end, and 30 is indoor heat converter, and 70 is outdoor heat converter, 80 is injection expansion valve, 90 is subcooler, and 100 use roundabout valve for spraying, and 112 is branch's pipe arrangement, 114 is roundabout pipe arrangement, 120 is pressure sensor, and 121,122,123 is first to three-temperature sensor, and 124 is control part.
Detailed description of the invention
Below, describe in detail according to embodiments of the invention with reference to accompanying drawing.
Fig. 1 is the pie graph with the air conditioner of steam ejection compression system according to the embodiment of the present invention.
In FIG, possess according to the air conditioner of the embodiment of the present invention: the basic comprising comprising compressor 10, cross valve 20, indoor heat converter 30, indoor expansion valve 40, outdoor expansion valve 50, check-valves 60 and outdoor heat converter 70; The steam ejection compression system comprising injection expansion valve 80, subcooler 90 and spray with roundabout valve 100.
Compressor 10 has two suction inlets, 11,13 and outlet, 12, two suction inlets 11,13 and is made up of the low pressure suction port 11 (hereinafter referred to as suction inlet) of discharge chambe and the middle pressure suction inlet 13 (hereinafter referred to as ejection end) of the discharge chambe that is connected to middle pressure being connected to low pressure.Therefore, compressor 10 is discharged by outlet 12 after the gaseous refrigerant of the low-temp low-pressure being drawn into suction inlet 11 is compressed into the gaseous state of HTHP, in this compression process, the restricted gender of confined cold-producing medium soakage in order to overcome according to the density of the cold-producing medium sucked from suction inlet 11 and discharge chambe volume, and the cold-producing medium of gaseous state is sprayed to ejection end 13.
Cross valve 20 has carry out being connected with outlet 12 and respectively to indoor heat converter 30 and outdoor heat converter 70 by the suction inlet 11 of compressor 10 two independently paths 21,23, and the refrigerating operaton selected according to user or heating operation mode carry out switch operation, to change refrigerant flow direction.
Indoor heat converter 30 side disposed in the interior, the evaporimeter liquid refrigerant of low-temp low-pressure being flashed to gaseous state is served as under cooling operation mode, and under heating operation mode, serve as the condenser of the liquid state gaseous refrigerant condenses of HTHP being become normal temperature high voltage, play the enthalpy change of reply cold-producing medium accordingly and carry out the effect of heat exchange with surrounding air.
Indoor expansion valve 40 side disposed in the interior, and be the electric expansion valve (EEV:Electronic Expansion Valve) being mixed with the two phase refrigerant of liquid and gas when refrigerating operaton, the expanding liquidus refrigerant of the normal temperature high voltage carried after outdoor heat converter 70 condensation being reduced pressure into low-temp low-pressure, maximum opening is adjusted to, to avoid the pressure loss occurs when heating operation.
Outdoor expansion valve 50 side disposed in the outdoor, and for the expanding liquidus refrigerant of the normal temperature high voltage carried after indoor heat converter 30 condensation being reduced pressure into when heating operation the electric expansion valve being mixed with the two phase refrigerant of liquid and gas of low-temp low-pressure, closed when refrigerating operaton, and open when heating operation.
Check-valves 60 is connected side by side with outdoor expansion valve 50, and check-valves 60 is the non-return valve only allowing cold-producing medium to flow to a direction, the liquid refrigerant carried after outdoor heat converter 70 condensation when refrigerating operaton allows to pass through, and the liquid refrigerant carried after indoor heat converter 30 condensation when heating operation does not allow to pass through.Accordingly, during refrigerating operaton, flow to indoor heat converter 30 by the cold-producing medium of outdoor heat converter 70 through check-valves 60, and flow to outdoor heat converter 70 by the cold-producing medium of indoor heat converter 30 through outdoor expansion valve 50 during heating operation.
Outdoor heat converter 70 side disposed in the outdoor, and contrary with in-room switch 30, serve as condenser when refrigerating operaton and at heating operation time serve as evaporimeter, play the effect carrying out heat exchange with ambient air accordingly.
Injection expansion valve 80 is arranged on the pipe arrangement 112 of main pipe arrangement 111 branch indoor between heat exchanger 30 and outdoor heat converter 70, and be electric expansion valve, it shunts rear puffing to a part for the liquid phase refrigerant that certain side in heat exchanger 30 indoor and outdoor heat converter 70 is carried, is then discharged to subcooler 90 by this cold-producing medium to spray.
Subcooler 90 is connected to the branch's pipe arrangement 112 and main pipe arrangement 111 that arrange injection expansion valve 80, and be double pipe heat exchanger, the liquid phase refrigerant carried for certain side made in heat exchanger 30 and outdoor heat converter 70 indoor carries out heat exchange with the cold-producing medium expanded in injection expansion valve 80, then overheated gaseous refrigerant is sent to ejection end 13 or the suction inlet 11 of compressor 10 by injection discharge pipe arrangement 113.
Spray and be arranged on the roundabout pipe arrangement 114 of discharging pipe arrangement 113 branch from injection with roundabout valve 100, travel back across the suction inlet 11 of compressor 10 for the injection cold-producing medium exported from subcooler 90.Accordingly, spraying the ejection end 13 flowing into compressor 10 under the state closed with roundabout valve 100 from the injection cold-producing medium of subcooler 90 output, and spraying under the state of opening with roundabout valve 100, because the pressure of ejection end 13 is higher than general suction inlet 11, the injection cold-producing medium therefore exported from subcooler 90 can not flow into the ejection end 13 of compressor 10 and all bypass to the suction inlet 11 of compressor 10.
Further, the air conditioner of the embodiment of the present invention, in order to improve the heat-exchange capacity of indoor and outside, is provided with indoor fan 31 at indoor heat converter 30, is provided with outdoor fan 71 at outdoor heat converter 70.Indoor fan 31 promotes the heat exchange between the cold-producing medium of flowing in indoor heat converter 30 and air, required cold wind or hot blast in generating chamber simultaneously, outdoor fan 71 promotes the heat exchange between the cold-producing medium of flowing in outdoor heat converter 70 and air, and plays urgency effect.
And, the pressure sensor 120 of the high side pressure for detecting the cold-producing medium of discharging from compressor 10 is provided with in outlet 12 side of compressor 10, be provided with in entrance 91 side of subcooler 90 for detecting the first temperature sensor 121 flowing into the temperature of the cold-producing medium of subcooler 90 after injection expansion valve 80 expands, outlet 92 side of subcooler 90 is provided with the second temperature sensor 122 of the temperature for detecting in subcooler 90 the injection cold-producing medium flowed out from subcooler 90 after heat exchange, when main pipe arrangement 111 side between subcooler 90 and indoor heat converter 30 is provided with for detecting refrigerating operaton outdoor heat exchanger 70 by the subcooler three-temperature sensor 123 flowing to the temperature of the cold-producing medium of indoor heat converter 30 after 90s.Three-temperature sensor 123 is the degree of supercooling detection temperature sensor for evaluating the degree of supercooling changed according to emitted dose.
The refrigerating operaton that the air conditioner of this embodiment of the present invention is selected according to user or heating operation make cross valve 20 commutate, and change refrigerant flow direction thus.
Fig. 2 is the pie graph of refrigerant flow direction when heating operation in Fig. 1 is shown, Fig. 3 is the pie graph of refrigerant flow direction when refrigerating operaton in Fig. 1 is shown.
In Fig. 2, cold-producing medium, with the sequential loop of compressor 10 → cross valve 20 → indoor heat converter 30 → indoor expansion valve 40 → subcooler 90 → outdoor expansion valve 50 → outdoor heat converter 70 → cross valve 20 → compressor 10, forms the cooling cycle system of heating operation accordingly.
In Fig. 3, cold-producing medium, with the sequential loop of compressor 10 → cross valve 20 → outdoor heat converter 70 → check-valves 60 → subcooler 90 → indoor expansion valve 40 → indoor heat converter 30 → cross valve 20 → compressor 10, forms the cooling cycle system of refrigerating operaton accordingly.
Fig. 4 is the control pie graph with the air conditioner of steam ejection compression system according to the embodiment of the present invention.
In Fig. 4, also comprise according to the air conditioner of the embodiment of the present invention and there is microcomputer and interlock circuit and for the control part 124 of each inscape of controlling air conditioner, for inputting the input part 125 of user-selected operational mode (refrigeration or heating operation).
Control part 124 is when user selects refrigeration or heating operation mode, regulate cross valve 20 according to selected operational mode and change refrigerant flow direction as shown in Figures 2 and 3, and utilize pressure sensor 120 and first to regulate the aperture of injection expansion valve 80 to the detected value of three-temperature sensor 121,122,123 according to refrigeration or heating operation mode, be adjusted to optimal dose to make the refrigerant amount of injection.
Specifically, when refrigerating operaton, control part 124 calculates the saturation temperature corresponding to the pass the discharge pressure of the compressor 10 that pressure sensor 120 detects, and utilize the saturation temperature of high pressure calculated and the condensator outlet temperature detected by three-temperature sensor 123 (that is, outdoor heat exchanger by flowing to the temperature of the cold-producing medium of indoor heat converter 30 after subcooler) to detect the degree of supercooling of condensator outlet.Degree of supercooling, according to 90 carrying out heat exchange and the amount of cold-producing medium of spraying and changing in subcooler, therefore in order to make the degree of supercooling detected maintain about 20 DEG C, increases or reduces the aperture of injection expansion valve 80.
And, when heating operation, (namely control part 124 utilizes the inlet temperature of the subcooler 90 detected by the first temperature sensor 121, after injection expansion valve expands, flow into the temperature of the cold-producing medium of subcooler) and the outlet temperature (that is, in subcooler after heat exchange by the temperature of overheated cold-producing medium) of the subcooler 90 that detected by the second temperature sensor 122 detect the degree of superheat of the cold-producing medium of injection.The degree of superheat in order to the cold-producing medium making injection maintains 0 DEG C ~ 5 DEG C, increases or reduce the aperture of injection expansion valve 80.
In embodiments of the present invention, control part 124 is set to one, with the inscape of inside this overall control room and outside, but the present invention is not limited thereto, also can separately and exclusively arrange respectively can the control part 124 of inside control room and outside separately, with this by between each control part 124 intercom mutually and inside overall control room with the inscape of outside.
Below, the course of work and the action effect of the control method of the air conditioner of as above structure are described.
The workflow diagram of control method when Fig. 5 is the heating operation for illustration of the air conditioner according to the embodiment of the present invention.
In Fig. 5, when user selects required operational mode (refrigeration or heating operation) by input part 125, be input to control part 124 by the operation information selected.
Accordingly, control part 124 determines whether heating operation (200), if heating operation, then switch cross valve 20 as shown in Figure 2 and change flow of refrigerant backward, just heating operation (202) is started, and in order to carry out heating operation, start compressor 10 (204).
The cold-producing medium of the HTHP of discharging from compressor 10 according to the operation of compressor 10 carries out heat exchange with indoor air and is condensed into the liquid phase refrigerant of high pressure indoor heat converter 30, and the liquid phase refrigerant being condensed into high pressure flow into outside by main pipe arrangement 111.Now, indoor expansion valve 40 is adjusted to maximum opening, to prevent the pressure loss.
The liquid phase refrigerant flowing into the high pressure of outside in subcooler 90 with carry out for the cold-producing medium sprayed by supercooling after heat exchange, injection expansion valve 80 is discharged to subcooler 90 after the liquid phase refrigerant puffing shunted from main pipe arrangement 111.
Now, flow into the temperature of the cold-producing medium of subcooler 90, namely to be inflated and the first temperature sensor 121 that the inlet temperature T1 being ejected into subcooler 90 is entrance side by being arranged on subcooler 90 detects, and the temperature of the cold-producing medium flowed out carry out heat exchange in subcooler 90 after, namely by overheated and detect (206) from the second temperature sensor 122 that the outlet temperature T2 that subcooler 90 flows out is outlet side by being arranged on subcooler 90.
The cold-producing medium being ejected into subcooler 90 expand into two-phase state from liquid phase decompression, and the inlet temperature T1 of subcooler 90 that therefore the first temperature sensor 121 detects is the saturation temperature of the pressure corresponding to the cold-producing medium be inflated.Therefore, if there is not the pressure loss at subcooler 90 or be in proper level, the outlet temperature T2 of subcooler 90 that then the second temperature sensor 122 detects is by the temperature of overheated cold-producing medium under the pressure condition identical with the inlet temperature T1 of subcooler 90, so the degree of superheat H being ejected into the cold-producing medium of subcooler 90 can detect (208) with the value of the inlet temperature T1 deducting subcooler 90 from the outlet temperature T2 of subcooler 90.
The amount of the cold-producing medium sprayed in heating operation, optimal dose can be adjusted to by the degree of superheat H detected is adjusted to the suitableeest scope, and if the state of the cold-producing medium sprayed is the cold-producing medium of the two-phase state including liquid phase or drop, then can damage the discharge chambe of compressor 10, the degree of superheat of the cold-producing medium therefore under any circumstance sprayed all should have the value of more than 0 DEG C.
Accordingly, control part 124 judges whether the degree of superheat H of the cold-producing medium detected is be more than or equal to the first degree of superheat H1 (about 0 DEG C) (210) preset, when the degree of superheat H of the cold-producing medium detected is less than the first degree of superheat H1, the degree of superheat of cold-producing medium is in lower state, therefore the aperture reducing injection expansion valve 80 reduces sprayed refrigerant amount, improves the degree of superheat (212) of cold-producing medium thus.
When the degree of superheat H that the judged result of step 210 is the cold-producing medium detected is more than or equal to the first degree of superheat H1, control part 124 judges whether the degree of superheat H of the cold-producing medium detected is be less than or equal to the second degree of superheat H2 (about 5 DEG C) (212) preset, when the degree of superheat H of the cold-producing medium detected is greater than the second degree of superheat H2, the degree of superheat of cold-producing medium is in higher state, therefore the aperture increasing injection expansion valve 80 increases the refrigerant amount of injection, reduces the degree of superheat (216) of cold-producing medium thus.
If this is because refrigerant superheat spends height, make the refrigerant density ejected reduce and reduce jeting effect, the refrigerant superheat degree therefore sprayed should have the value of less than 5 DEG C.
When the degree of superheat H that the judged result of step 214 is the cold-producing medium detected is less than or equal to the second degree of superheat H2, because refrigerant superheat degree H is at proper range, so maintain the injection original aperture of expansion valve 80 (218).
So, be detected the mode of temperature by utilizing first and second temperature sensor 121,122 and the injection expansion valve 80 of sprayed refrigerant amount can be regulated, the refrigerant superheat degree of injection is maintained the value between 0 DEG C ~ 5 DEG C, thus any heat condition under all control as performing heating operation (220) while ejecting optimal refrigerant amount.
The workflow diagram of control method when Fig. 6 is the refrigerating operaton for illustration of the air conditioner according to the embodiment of the present invention.
In Fig. 6, when user selects required operational mode (refrigeration or heating operation) by input part 125, be input to control part 124 by the operation information selected.
Accordingly, control part 124 determines whether refrigerating operaton (300), if refrigerating operaton, then switch cross valve 20 as shown in Figure 3 and change flow of refrigerant backward, just refrigerating operaton (302) is started, and in order to carry out refrigerating operaton, start compressor 10 (304).
The cold-producing medium of the HTHP of discharging from compressor 10 according to the operation of compressor 10 carries out heat exchange with outdoor air and is condensed into the liquid phase refrigerant of high pressure outdoor heat converter 70, and the liquid phase refrigerant being condensed into high pressure flow into subcooler 90 by main pipe arrangement 111.
The liquid phase refrigerant flowing into the high pressure of subcooler 90 in subcooler 90 with carry out for the cold-producing medium sprayed by supercooling after heat exchange, injection expansion valve 80 is discharged to subcooler 90 after the liquid phase refrigerant puffing shunted from main pipe arrangement 111.
Now, the pressure of high-pressure side cold-producing medium of discharging from compressor 10 is that the pressure sensor 120 of outlet 12 side by being arranged on compressor 10 detects, flow into the temperature of the cold-producing medium of indoor through subcooler 90 from the outdoor heat converter 70 serving as condenser, namely condensator outlet temperature T3 is that three-temperature sensor 123 on main pipe arrangement 111 by being arranged between subcooler 90 and indoor heat converter 30 detects (306).
During refrigerating operaton, usually compared to the refrigerant amount directly controlling to spray, more need to utilize ejection function to maintain the degree of supercooling of condensator outlet.Therefore, control part 124 calculates the saturation temperature T4 (308) that namely discharge pressure corresponding to the compressor 10 that pressure sensor 120 detects corresponds to the high pressure of cold-producing medium, and can deduct the value of condensator outlet temperature T3 to detect degree of supercooling C (310) from the saturation temperature T4 of high pressure.
The amount of the cold-producing medium sprayed according to carrying out heat exchange in subcooler 90 due to degree of supercooling C and changing, therefore control part 124 judges that whether degree of supercooling C is lower than target degree of supercooling Cs (about 20 DEG C) (312), when the degree of supercooling C detected is lower than target degree of supercooling Cs, the aperture increasing injection expansion valve 80 increases the refrigerant amount of injection, is increased in the refrigerant amount that carries out heat exchange in subcooler 90 thus and relative to current raising degree of supercooling (314).
The judged result of step 312 be the degree of supercooling C detected be more than or equal to target degree of supercooling Cs time, control part 124 judges that whether the degree of supercooling C detected is for being greater than target degree of supercooling Cs (about 20 DEG C) (316), if the degree of supercooling C detected is greater than target degree of supercooling Cs, the aperture then reducing injection expansion valve 80 reduces the refrigerant amount of injection, reduces the refrigerant amount that carries out heat exchange in subcooler 90 thus and relative to current reduction degree of supercooling (318).
The judged result of step 316 be degree of supercooling C be not more than target degree of supercooling Cs time, because degree of supercooling C is at proper range, thus maintain the injection original aperture of expansion valve 80 (320).
And, due to the circulating mass of refrigerant without the need to increasing condenser side during refrigerating operaton, so the cold-producing medium flowed out from subcooler 90 be not directly injected to the ejection end 13 of compressor 10 with roundabout valve 100 by utilizing to spray but travel back across the suction inlet 11 of compressor 10.Such as, when injection closes with roundabout valve 100, the ejection end 13 of compressor 10 is flow into from the injection cold-producing medium of subcooler 90 outflow, and spray when opening with roundabout valve 100, because the pressure of ejection end 13 is higher than the pressure of general suction inlet 11, the injection cold-producing medium therefore flowed out from subcooler 90 can not flow into the ejection end 13 of compressor 10 but all travel back across the suction inlet 11 of compressor 10.
Therefore, control part 124 is optionally opened and is sprayed with roundabout valve 100 (322), the overload condition higher because of outdoor temperature or other conditions and when making high pressure during refrigerating operaton higher, do not use ejection function and utilize subcooler 90 can successfully use supercooling function while reducing the circulating mass of refrigerant of condenser side.
So, detect the mode of degree of supercooling by utilizing pressure sensor 120 and three-temperature sensor 123 and the injection expansion valve 80 of sprayed refrigerant amount can be regulated, the degree of supercooling of condensator outlet is maintained in the scope of target degree of supercooling, thus all control to perform refrigerating operaton (324) under any cryogenic conditions while ejecting optimal refrigerant amount.
Claims (12)
1. an air conditioner, is characterized in that comprising:
Compressor, the cold-producing medium of gas jet state in the compression process of the cold-producing medium sucked;
Heat exchange is carried out with the indoor heat converter of this cold-producing medium of condensation to the cold-producing medium of discharging from described compressor;
Be connected to described compressor by pipe arrangement and heat exchange is carried out to evaporate the outdoor heat converter of this cold-producing medium to the cold-producing medium received from described indoor heat converter;
Be arranged on the branch's pipe arrangement from the main pipe arrangement branch between described indoor heat converter and outdoor heat converter, after shunting the cold-producing medium carried from described indoor heat converter, it carried out to the injection expansion valve of puffing;
Be connected to described branch pipe arrangement and main pipe arrangement, make the cold-producing medium of the cold-producing medium of described expansion and described condensation carry out heat exchange and be ejected into the subcooler of described compressor;
For the test section of the inlet temperature and outlet temperature that detect described subcooler;
The degree of superheat of the cold-producing medium of described injection is detected by the value deducting described inlet temperature from described outlet temperature, and the described degree of superheat detected is compared with first and second degree of superheat preset and increases or reduce the aperture of described injection expansion valve, with the control part making the degree of superheat of described cold-producing medium maintain the value between first and second degree of superheat described
Described inlet temperature is the temperature of the entrance of the described subcooler that the cold-producing medium of described expansion flows into, and described outlet temperature is the temperature of the outlet of the described subcooler that the cold-producing medium of described injection flows out,
The degree of superheat of the cold-producing medium of described injection is 0 DEG C ~ 5 DEG C.
2. air conditioner as claimed in claim 1, it is characterized in that described injection expansion valve is arranged on from the pipe arrangement branched out between described indoor heat converter and described outdoor heat converter, and to the backward described subcooler transmission of the cold-producing medium puffing of described shunting.
3., as the air conditioner in claim 1 to 2 as described in any one, it is characterized in that described subcooler is double pipe heat exchanger.
4. an air conditioner, is characterized in that comprising:
Compressor;
Heat exchange is carried out with the outdoor heat converter of this cold-producing medium of condensation to the cold-producing medium of discharging from described compressor;
Be connected to described compressor by pipe arrangement and heat exchange is carried out to evaporate the indoor heat converter of this cold-producing medium to the cold-producing medium received from described outdoor heat converter;
Be arranged on the branch's pipe arrangement from the main pipe arrangement branch between described indoor heat converter and outdoor heat converter, after shunting the cold-producing medium carried from described outdoor heat converter, it carried out to the injection expansion valve of puffing;
Be connected to described branch pipe arrangement and main pipe arrangement, make the cold-producing medium of the cold-producing medium of described expansion and described condensation carry out the subcooler of heat exchange;
The degree of supercooling that the degree of supercooling detecting the outlet of the main pipe arrangement of described subcooler also detects described in basis regulates the aperture of described injection expansion valve and controls the control part of the amount of the cold-producing medium of described injection;
For the roundabout valve of injection of the cold-producing medium of roundabout described injection;
The roundabout valve of described injection is arranged on from described subcooler and the pipe arrangement that branches out between the ejection end of the described compressor of the cold-producing medium that receives described injection, and for the cold-producing medium of described injection being sent to the suction inlet of described compressor.
5. air conditioner as claimed in claim 4, it is characterized in that described injection expansion valve is arranged on from the pipe arrangement branched out between described indoor heat converter and described outdoor heat converter, and be sent to described subcooler to after the cold-producing medium puffing of described shunting.
6. air conditioner as claimed in claim 4, is characterized in that:
Also comprise the pressure sensor of the pressure for detecting described cold-producing medium of discharging from compressor and the temperature sensor for the outlet temperature that detects the main pipe arrangement of described subcooler;
Described control part calculates the saturation temperature of the high pressure of the pressure corresponding to the cold-producing medium that described pressure sensor detects, and is detected the degree of supercooling of described cold-producing medium by the value of the outlet temperature deducting the main pipe arrangement of described subcooler from the saturation temperature of the described high pressure calculated.
7. air conditioner as claimed in claim 6, it is characterized in that described temperature sensor be arranged on connect described subcooler and described indoor heat converter pipe arrangement on, and in described subcooler, to carry out heat exchange and by the temperature of overcooled cold-producing medium for detecting.
8. air conditioner as claimed in claim 6, is characterized in that the described degree of supercooling detected compares with target degree of supercooling by described control part, according to comparative result increase or the aperture reducing described injection expansion valve.
9., as the air conditioner in claim 4 to 8 as described in any one, it is characterized in that described subcooler is double pipe heat exchanger.
10. a control method for air conditioner, is characterized in that comprising step:
By outdoor heat converter, heat exchange is carried out and this cold-producing medium of condensation to the cold-producing medium of discharging from compressor;
By the injection expansion valve of the branch's pipe arrangement being arranged on the main pipe arrangement branch indoor between heat exchanger and outdoor heat converter, puffing is carried out to a part for the cold-producing medium of described condensation;
The cold-producing medium making described expansion by the subcooler being connected to described branch pipe arrangement and main pipe arrangement and the cold-producing medium be condensed carry out heat exchange and are ejected into described compressor;
Detect the degree of supercooling of the outlet of the main pipe arrangement of described subcooler;
The aperture of described injection expansion valve is regulated according to the described degree of supercooling detected, to control the amount of the cold-producing medium of described injection,
Also comprise the step of the cold-producing medium of roundabout described injection;
The step of the cold-producing medium of described roundabout injection is by being arranged on the suction inlet with roundabout valve, the cold-producing medium of described injection being sent to described compressor from the injection described subcooler and the pipe arrangement that branches out between the ejection end of the described compressor of the cold-producing medium that receives described injection.
The control method of 11. air conditioners as claimed in claim 10, is characterized in that the step of described detection degree of supercooling is:
Detect the pressure of the cold-producing medium of the high pressure of the outlet side of described compressor;
Detect as the main pipe arrangement of described subcooler outlet temperature by after described subcooler heat exchange by the temperature of overcooled cold-producing medium;
Calculate the saturation temperature of the high pressure of the pressure of the cold-producing medium detected described in corresponding to, detect described degree of supercooling by the value of the outlet temperature deducting the main pipe arrangement of described subcooler from the saturation temperature of the described high pressure calculated.
The control method of 12. air conditioners as claimed in claim 11, is characterized in that the described step controlling the amount of the cold-producing medium sprayed is:
The described degree of supercooling that detects and target degree of supercooling are compared and increase or reduce the aperture of described injection expansion valve, maintains described target degree of supercooling with the degree of supercooling detected described in making.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2008-0121562 | 2008-12-03 | ||
| KR1020080121562A KR101590884B1 (en) | 2008-12-03 | 2008-12-03 | Air conditioner and control method thereof |
| CN200910203600.7A CN101749805B (en) | 2008-12-03 | 2009-05-27 | Air conditioner and control method thereof |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910203600.7A Division CN101749805B (en) | 2008-12-03 | 2009-05-27 | Air conditioner and control method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN104296245A true CN104296245A (en) | 2015-01-21 |
| CN104296245B CN104296245B (en) | 2017-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410539476.2A Expired - Fee Related CN104296245B (en) | 2008-12-03 | 2009-05-27 | Air conditioner and its control method |
| CN200910203600.7A Expired - Fee Related CN101749805B (en) | 2008-12-03 | 2009-05-27 | Air conditioner and control method thereof |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910203600.7A Expired - Fee Related CN101749805B (en) | 2008-12-03 | 2009-05-27 | Air conditioner and control method thereof |
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| KR (1) | KR101590884B1 (en) |
| CN (2) | CN104296245B (en) |
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| CN109237671A (en) * | 2017-07-10 | 2019-01-18 | Lg电子株式会社 | Utilize the air-conditioning device and its control method of steam jetting circulation |
| CN109798627A (en) * | 2019-01-15 | 2019-05-24 | 广东美的暖通设备有限公司 | The control method and device of multi-line system |
| CN111426037A (en) * | 2020-04-03 | 2020-07-17 | 广东美的暖通设备有限公司 | Air conditioner, operation control method of air conditioner, and readable storage medium |
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| KR101590884B1 (en) * | 2008-12-03 | 2016-02-19 | 삼성전자 주식회사 | Air conditioner and control method thereof |
| KR101221718B1 (en) * | 2010-12-30 | 2013-01-11 | 롯데알미늄 주식회사 | The cooling-cycle that can prevent compressor from over-heat |
| KR101069229B1 (en) * | 2011-04-27 | 2011-09-30 | 세협기계(주) | Refrigerant device with stabilized refrigerant circuit |
| CN102927651B (en) * | 2011-08-11 | 2014-12-03 | 青岛海信日立空调系统有限公司 | Water temperature self-adaptive water source air conditioning system and control method thereof |
| JP6112388B2 (en) * | 2012-11-16 | 2017-04-12 | パナソニックＩｐマネジメント株式会社 | Refrigeration equipment |
| KR102103358B1 (en) * | 2013-04-15 | 2020-04-22 | 엘지전자 주식회사 | Air Conditioner and Controlling method for the same |
| US10451326B2 (en) | 2014-04-16 | 2019-10-22 | Johnson Controls Technology Company | Method for operating a chiller |
| KR101726073B1 (en) | 2015-10-01 | 2017-04-11 | 엘지전자 주식회사 | Air conditioning system |
| CN106016741B (en) * | 2016-06-02 | 2018-09-28 | 珠海格力电器股份有限公司 | Performance improving method of heat pump hot water unit |
| WO2019113094A1 (en) * | 2017-12-06 | 2019-06-13 | Johnson Controls Technology Company | Control system and a control method for a hvac unit and a media comprising such processor-executable instructions |
| KR102125094B1 (en) | 2018-11-21 | 2020-07-07 | 엘지전자 주식회사 | Supercooling heat exchanger and air conditioning system including the same |
| JP7183381B2 (en) * | 2019-03-06 | 2022-12-05 | 三菱電機株式会社 | refrigeration cycle equipment |
| CN110186225B (en) * | 2019-06-20 | 2024-06-28 | 南京佳力图机房环境技术股份有限公司 | System for improving supercooling degree of fluorine pump inlet and control method thereof |
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| CN112082200B (en) * | 2020-09-25 | 2024-06-25 | 珠海格力节能环保制冷技术研究中心有限公司 | Indoor unit set, multi-connected air conditioning system and supercooling degree control method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR101590884B1 (en) | 2016-02-19 |
| CN101749805B (en) | 2014-11-19 |
| CN104296245B (en) | 2017-10-17 |
| CN101749805A (en) | 2010-06-23 |
| KR20100063173A (en) | 2010-06-11 |
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