CN104764240A - Air conditioning system having defrosting function and control method thereof - Google Patents
Air conditioning system having defrosting function and control method thereof Download PDFInfo
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- CN104764240A CN104764240A CN201410006696.9A CN201410006696A CN104764240A CN 104764240 A CN104764240 A CN 104764240A CN 201410006696 A CN201410006696 A CN 201410006696A CN 104764240 A CN104764240 A CN 104764240A
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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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
- F24F11/70—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
- 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
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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
- 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
- F24F11/41—Defrosting; Preventing freezing
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02742—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using two four-way 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
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses an air conditioning system having a defrosting function and a control method thereof. The air conditioning system comprises an outdoor unit and an indoor unit, wherein a main four-way reversing valve and a heat accumulation four-way reversing valve are arranged in the outdoor unit; and the synchronous operation of parallel heating and defrosting process, the operation of single unit heating and single unit defrosting and the synchronous operation of parallel heating and heat accumulation of the air conditioning system are realized by controlling the opening/closing of the main four-way reversing valve, the heat accumulation four-way reversing valve and other electromagnetic valves. The air conditioning system can realize the synchronous operation of parallel heating and defrosting process, the operation of single unit heating and single unit defrosting and the synchronous operation of parallel heating and heat accumulation, and the indoor unit can continuously operate for heating during defrosting and heat accumulation, so that users can have better experiences and the comfort is greatly improved.
Description
Technical field
The present invention relates to Air-condition system control field, relate to a kind of air-conditioning system and the control method thereof that possess defrost function more specifically.
Background technology
Air-conditioning and air conditioning, refer to the process of carrying out regulation and control by the parameter such as temperature, humidity, cleanliness factor, speed of artificial means to building/structures environment air, the structure of air-conditioning mainly comprises: compressor, condenser, evaporimeter, cross valve, check valve capillary module form.
Southern winter, indoor temperature was lower, using air-condition is usually needed to heat room air, but when air-conditioning heats, cause outdoor heat exchanger to occur frost when evaporating temperature reduces, outdoor heat exchanger frosting will have a strong impact on the heating performance of air-conditioning.
Defrost system mainly hot-gas bypass method and the cross valve reverse that prior art is conventional.To be the part of being discharged by compressor give outdoor heat exchanger with the gas of heat by branch road defrosts for the general principle of hot-gas bypass method, but such Defrost mode can be shunted partial heat that compressor produces and then affect the heating performance of air-conditioning, and not only defrosting time is long but also defrosting effect is poor to adopt hot-gas bypass method to carry out defrosting.The general principle of cross valve reverse adopts four-way change-over valve defrosted to outdoor heat exchanger respectively by the path switching cross valve different and heated indoor, the operating mode switching four-way change-over valve is needed when using the method to defrost, air-conditioning system is become refrigerating state from the state of heating, thus can not ensure continual to indoor heating, thus comfort level is caused to reduce poor user experience.
Summary of the invention
One object of the present invention is, proposes a kind of heating operations and defrost process can be run simultaneously, and heating operations and heat-accumulating process can carry out simultaneously, namely carrying out defrosting, the non-stop air-conditioning system of heating operation in heat-accumulating process.
Another object of the present invention is, proposes a kind of control method possessing the air-conditioning system of defrost function, can realize heating operations and defrost process is run simultaneously, and heating operations and heat-accumulating process run simultaneously.
For reaching the present invention of this object by the following technical solutions:
Possess an air-conditioning system for defrost function, comprise off-premises station and indoor set, in described off-premises station, be provided with main four-way change-over valve and accumulation of heat four-way change-over valve;
The d mouth of described accumulation of heat four-way change-over valve is connected with the outlet of the first compressor, outdoor condenser, outdoor electrical expansion valve, accumulation of heat electric expansion valve, phase change heat accumulator is in series with successively between the c mouth of described accumulation of heat four-way change-over valve and e mouth, be connected serially to the entrance of gas-liquid separator after the s mouth of described accumulation of heat four-way change-over valve is in parallel with the s mouth of described main four-way change-over valve, two outlets of described gas-liquid separator are connected to the entrance of the first compressor and the second compressor respectively;
The d mouth of described main four-way change-over valve is connected with the outlet of the second compressor, and the e mouth of described main four-way change-over valve is connected to one end of described indoor set by tracheae stop valve;
First branch road in parallel with described accumulation of heat electric expansion valve is also provided with between described outdoor electrical expansion valve with described accumulation of heat electric expansion valve, described first branch road is in series with high-pressure reservoir, liquid pipe stop valve successively, and is connected to the other end of described indoor set by described liquid pipe stop valve;
Magnetic valve is parallel with between the d mouth of described accumulation of heat four-way change-over valve and the d mouth of described main four-way change-over valve.
Further, the first oil eliminator and the first check valve is connected with in turn between the d mouth of described first compressor and described accumulation of heat four-way change-over valve.
Further, the second oil eliminator and the second check valve is connected with in turn between the d mouth of described second compressor and described main four-way change-over valve.
Further, the two ends of described outdoor electrical expansion valve are parallel with outdoor check valve.
Further, capillary is provided with between the c mouth of described main four-way change-over valve and s mouth.
Further, be provided with at least one group of heat supply branch road in described indoor set, described heat supply branch road comprises the indoor evaporator and indoor electronic expansion valve that are arranged in series.
Be applied to the above-mentioned control method possessing the air-conditioning system of defrost function, comprise:
Parallel connection heats and defrost process, comprising: control described main four-way change-over valve energising, accumulation of heat electric expansion valve normally works, and indoor electronic expansion valve is opened, accumulation of heat four-way change-over valve no power, and outdoor electrical expansion valve cuts out;
Unit heats and unit defrost process, comprising: control described main four-way change-over valve energising, accumulation of heat electric expansion valve normally works, and indoor electronic expansion valve is opened, accumulation of heat four-way change-over valve no power, and outdoor electrical expansion valve cuts out, closed electromagnetic valve;
Parallel connection heats and regenerative operation process, comprising: control described main four-way change-over valve energising, accumulation of heat four-way change-over valve is energized, and accumulation of heat electric expansion valve is opened, and outdoor electrical expansion valve normally works, and indoor electronic expansion valve is opened;
Refrigerating operaton process, comprising: control described indoor electronic expansion valve and open, main four-way change-over valve no power, accumulation of heat four-way change-over valve no power, accumulation of heat electric expansion valve is closed, and outdoor electrical expansion valve cuts out.
Beneficial effect of the present invention is:
(1) air-conditioning system in the present invention can realize parallel connection heat with defrost run simultaneously, in parallel heat run with accumulation of heat simultaneously, unit heats and unit Defrost operation, when carrying out defrosting and accumulation of heat, indoor set heats and does not shut down running, can be supplied to the better use sense of user to be subject to, comfort level improves greatly;
(2) pipeline that the air-conditioning system in the present invention is connected with storage heater is less, is conducive to carrying out modularization to storage heater, the complexity of effective reduction system;
(3) storage heater in the present invention is directly connected with the air exit of compressor, and because the temperature of air exit is higher, therefore alternative phase-change material kind for storage heater is more;
(4) control method in the present invention; by regulating the on off state of two four-way change-over valve and magnetic valve etc.; can realize parallel connection heat with defrost run simultaneously, in parallel heat run with accumulation of heat simultaneously, unit heats and unit Defrost operation, realize in Defrost operation process, ensureing that interior machine-processed heat is not shut down.
Accompanying drawing explanation
Fig. 1 is that the air-conditioning system possessing defrost function that the specific embodiment of the invention provides is in parallel connection and heats refrigerant flow direction schematic diagram when running with defrost process;
Fig. 2 is that the air-conditioning system possessing defrost function that the specific embodiment of the invention provides is in unit and heats refrigerant flow direction schematic diagram when running with unit defrost process;
Fig. 3 is that the air-conditioning system possessing defrost function that the specific embodiment of the invention provides is in parallel connection and heats and refrigerant flow direction schematic diagram during regenerative operation;
Fig. 4 is the air-conditioning system possessing defrost function that the specific embodiment of the invention provides refrigerant flow direction schematic diagram when being in refrigerating operaton.
In figure:
1, the first compressor; 2, the second compressor; 3, the first oil eliminator; 4, the second oil eliminator; 5, accumulation of heat four-way change-over valve; 6, main four-way change-over valve; 7, capillary; 8, outdoor condenser; 9, outdoor electrical expansion valve; 10, outdoor check valve; 11, high-pressure reservoir; 12, liquid pipe stop valve; 13, indoor electronic expansion valve; 14, indoor evaporator; 15, tracheae stop valve; 16, gas-liquid separator; 17, accumulation of heat electric expansion valve; 18, phase change heat accumulator; 19, magnetic valve; 20, the first check valve; 21, the second check valve; A, off-premises station; B, indoor set.
Detailed description of the invention
Technical scheme of the present invention is further illustrated by detailed description of the invention below in conjunction with accompanying drawing.
As Figure 1-4, be a kind of air-conditioning system possessing defrost function that the present invention proposes, comprise off-premises station A and indoor set B, in described off-premises station A, be provided with main four-way change-over valve 6 and accumulation of heat four-way change-over valve 5; Be provided with at least one group of heat supply branch road in described indoor set B, described heat supply branch road comprises the indoor evaporator 14 and indoor electronic expansion valve 13 that are arranged in series.Wherein, the d mouth of described accumulation of heat four-way change-over valve 5 is connected with the outlet of the first compressor 1, is connected with the first oil eliminator 3 and the first check valve 20 between described first compressor 1 and the d mouth of described accumulation of heat four-way change-over valve 5 in turn.Be in series with outdoor condenser 8, outdoor electrical expansion valve 9, accumulation of heat electric expansion valve 17, phase change heat accumulator 18 successively between the c mouth of described accumulation of heat four-way change-over valve 5 and e mouth, the two ends of described outdoor electrical expansion valve 9 are parallel with outdoor check valve 10.The entrance of the first compressor 1 or the second compressor 2 is connected to after being connected serially to gas-liquid separator 16 after the s mouth of described accumulation of heat four-way change-over valve 5 is in parallel with the s mouth of described main four-way change-over valve 6; Capillary 7 is provided with between the c mouth of described main four-way change-over valve 6 and s mouth.
The d mouth of described main four-way change-over valve 6 is connected with the outlet of the second compressor 2, wherein, is connected with the second oil eliminator 4 and the second check valve 21 between described second compressor 2 and the d mouth of described main four-way change-over valve 6 in turn.The e mouth of described main four-way change-over valve 6 is connected to one end of described indoor set B by tracheae stop valve 15; First branch road in parallel with described accumulation of heat electric expansion valve 17 is also provided with between described outdoor electrical expansion valve 9 with described accumulation of heat electric expansion valve 17, described first branch road is in series with high-pressure reservoir 11, liquid pipe stop valve 12 successively, and is connected to the other end of described indoor set B by described liquid pipe stop valve 12; Magnetic valve 19 is parallel with between the d mouth of described accumulation of heat four-way change-over valve 5 and the d mouth of described main four-way change-over valve 6.
Air-conditioning system in the present invention can realize parallel connection heat with defrost run simultaneously, in parallel heat run with accumulation of heat simultaneously, unit heats and unit Defrost operation, when carrying out defrosting and accumulation of heat, indoor set heats and does not shut down running, can be supplied to the better use sense of user to be subject to, comfort level improves greatly; The pipeline that air-conditioning system is connected with storage heater is less, is conducive to carrying out modularization to storage heater, effective reduction system complicated; Storage heater is directly connected with the air exit of compressor, and because the temperature of air exit is higher, therefore alternative phase-change material kind for storage heater is more.
The invention allows for and be a kind ofly applied to the above-mentioned control method possessing defrost function air-conditioning system, comprising: parallel connection heats and to heat with defrost process, unit with unit defrost process, in parallelly to heat and regenerative operation process, refrigerating operaton process.
As shown in Figure 1, when carrying out parallel connection and heating with defrost process, control described main four-way change-over valve 6 and be energized, accumulation of heat electric expansion valve 17 normally works, and indoor electronic expansion valve 13 is opened, and accumulation of heat four-way change-over valve 5 no power, outdoor electrical expansion valve 9 cuts out.Now, the refrigerant flow direction in air-conditioning system forms three loops, and one is defrost circuit, and another two is that defrost process first parallel connection heats loop and defrost process second parallel connection heats loop.
Defrost circuit comprises: from the first compressor 1, out high-temperature high-pressure refrigerant passes through the first oil eliminator 3, first check valve 20 successively, accumulation of heat four-way change-over valve 5 is entered by the d mouth of accumulation of heat four-way change-over valve 5, then entered into the e mouth of accumulation of heat four-way change-over valve 5 successively by outdoor condenser 8, outdoor check valve 10, accumulation of heat electric expansion valve 17, phase change heat accumulator 18 from the c mouth of accumulation of heat four-way change-over valve 5 cold-producing medium out, got back to the first compressor 1 by gas-liquid separator 16 from the s mouth cold-producing medium out of accumulation of heat four-way change-over valve 5, complete defrost process.
Defrost process first parallel connection heats loop and comprises: from the first compressor 1, high-temperature high-pressure refrigerant is out successively by the first oil eliminator 3, first check valve 20, magnetic valve 19 enters the d mouth of main four-way change-over valve 6, entered indoor set B through indoor evaporator from the e mouth cold-producing medium out of main four-way change-over valve 6 by tracheae stop valve 15, after indoor electronic expansion valve 13 carries out heat exchange, through liquid pipe stop valve 12, high-pressure reservoir 11, accumulation of heat electric expansion valve 17, the e mouth of accumulation of heat four-way change-over valve 5 is entered after phase change heat accumulator 18, get back to after gas-liquid separator 16 first compressor 1 from the s mouth cold-producing medium out of accumulation of heat four-way change-over valve 5.
Defrost process second parallel connection heats loop and comprises: from the second compressor 2, high-temperature high-pressure refrigerant is out successively by the second oil eliminator 4, second check valve 21 enters the d mouth of main four-way change-over valve 6, entered indoor set B through indoor evaporator 14 from the e mouth cold-producing medium out of main four-way change-over valve 6 by tracheae stop valve 15, after indoor electronic expansion valve 13 carries out heat exchange, through liquid pipe stop valve 12, high-pressure reservoir 11, accumulation of heat electric expansion valve 17, the e mouth of accumulation of heat four-way change-over valve 5 is entered after phase change heat accumulator 18, get back to after gas-liquid separator 16 second compressor 2 from the s mouth cold-producing medium out of accumulation of heat four-way change-over valve 5.
As shown in Figure 2, heat with in unit Defrost operation process carrying out unit, control described main four-way change-over valve 6 and be energized, accumulation of heat electric expansion valve 17 normally works, and indoor electronic expansion valve 13 is opened, accumulation of heat four-way change-over valve 5 no power, outdoor electrical expansion valve 9 cuts out, and magnetic valve 19 cuts out.Refrigerant flow direction now in air-conditioning system forms two loops, and one is unit defrost circuit, and one is single-unit hot loop.
Unit defrost circuit comprises: from the first compressor 1, high-temperature high-pressure refrigerant out enters into accumulation of heat four-way change-over valve 5 through the first oil eliminator 3, first check valve 20 by the d mouth of accumulation of heat four-way change-over valve 5 successively, and goes out from c mouth and get back to the first compressor 1 through the e mouth of outdoor condenser 8, outdoor check valve 10, accumulation of heat electric expansion valve 17, phase change heat accumulator 18, accumulation of heat four-way change-over valve 5, the s mouth of accumulation of heat four-way change-over valve 5, gas-liquid separator 16 successively.
Single-unit hot loop comprises: from the second compressor 2, high-temperature high-pressure refrigerant is out through the second oil eliminator 4, second check valve 21 enters into main four-way change-over valve 6 from d mouth, the indoor evaporator 14 of indoor set B is entered into and indoor electronic expansion valve 13 carries out heat exchange through tracheae stop valve 15 from the e mouth of main four-way change-over valve 6 cold-producing medium out, and get back in off-premises station A by liquid pipe stop valve 12, then, cold-producing medium is successively through high-pressure reservoir 11, accumulation of heat electric expansion valve 17, phase change heat accumulator 18, the e mouth of accumulation of heat four-way change-over valve 5, the s mouth of accumulation of heat four-way change-over valve 5, gas-liquid separator 16 is got back in the second compressor 2.
As shown in Figure 3, when carrying out parallel connection and heating with heat-accumulating process, control described main four-way change-over valve 6 and be energized, accumulation of heat four-way change-over valve 5 is energized, and accumulation of heat electric expansion valve 17 is opened, and outdoor electrical expansion valve 9 normally works, and indoor electronic expansion valve 13 is opened.Now, the refrigerant flow direction in air-conditioning system forms three loops, and one is accumulation of heat loop, and another two is that heat-accumulating process first parallel connection heats loop and heat-accumulating process second parallel connection heats loop.
Accumulation of heat loop comprises: from the first compressor 1, high-temperature high-pressure refrigerant out arrives phase change heat accumulator 18 carry out accumulation of heat through the d mouth of the first oil eliminator 3, first check valve 20, accumulation of heat four-way change-over valve 5, the e mouth of accumulation of heat four-way change-over valve 5, then gets back in the first compressor 1 through the c mouth of accumulation of heat electric expansion valve 17, outdoor electrical expansion valve 9, outdoor condenser 8, accumulation of heat four-way change-over valve 5, the s mouth of accumulation of heat four-way change-over valve 5, gas-liquid separator 16 successively.
Heat-accumulating process first parallel connection heats loop and comprises: from the first compressor 1, high-temperature high-pressure refrigerant is out through the first oil eliminator 3, first check valve 20, magnetic valve 19, the d mouth of main four-way change-over valve 6, the e mouth of main four-way change-over valve 6, tracheae stop valve 15 enters the indoor evaporator 14 in indoor set B, indoor electronic expansion valve 13 carries out heat exchange, then successively by liquid pipe stop valve 12, high-pressure reservoir 11, outdoor electrical expansion valve 9, outdoor condenser 8, the c mouth of accumulation of heat four-way change-over valve 5, the s mouth of accumulation of heat four-way change-over valve 5, gas-liquid separator 16 is got back in the first compressor 1.
Heat-accumulating process second parallel connection heats loop and comprises: from the second compressor 2, high-temperature high-pressure refrigerant is out successively through the second oil eliminator 4, second check valve 21, the d mouth of main four-way change-over valve 6, the e mouth of main four-way change-over valve 6, tracheae stop valve 15 enters indoor evaporator 14 in indoor set B, indoor electronic expansion valve 13 carries out heat exchange, then successively by liquid pipe stop valve 12, high-pressure reservoir 11, outdoor electrical expansion valve 9, outdoor condenser 8, the c mouth of accumulation of heat four-way change-over valve 5, the s mouth of accumulation of heat four-way change-over valve 5, gas-liquid separator 16 is got back in the second compressor 2.
As shown in Figure 4, when carrying out process of refrigerastion, controlling described indoor electronic expansion valve 13 and opening, main four-way change-over valve 6 no power, accumulation of heat four-way change-over valve 5 no power, accumulation of heat electric expansion valve 17 is closed, and outdoor electrical expansion valve 17 cuts out.Now, refrigerant flow direction can form three refrigerating circuits within air-conditioning systems.
First refrigerating circuit comprises: from the first compressor 1, high-temperature high-pressure refrigerant is out successively through the first oil eliminator 3, first check valve 20, the d mouth of accumulation of heat four-way change-over valve 5, the c mouth of accumulation of heat four-way change-over valve 5, outdoor condenser 8, outdoor check valve 10, high-pressure reservoir 11, liquid pipe stop valve 12, indoor electronic expansion valve 13, indoor evaporator 14, tracheae stop valve 15, the e mouth of main four-way change-over valve 6, the s mouth of main four-way change-over valve 6, gas-liquid separator 16 is got back in the first compressor 1.
Second refrigerating circuit comprises: from the second compressor 2, high-temperature high-pressure refrigerant is out successively through the second oil eliminator 4, second check valve 21, magnetic valve 19, the d mouth of accumulation of heat four-way change-over valve 5, the c mouth of accumulation of heat four-way change-over valve 5, outdoor condenser 8, outdoor check valve 10, high-pressure reservoir 11, liquid pipe stop valve 12, indoor electronic expansion valve 13, indoor evaporator 14, tracheae stop valve 15, the e mouth of main four-way change-over valve 6, the s mouth of main four-way change-over valve 6, gas-liquid separator 16 is got back in the second compressor 2.
3rd refrigerating circuit comprises: from the second compressor 2, high-temperature high-pressure refrigerant is out got back in the second compressor 2 through the second oil eliminator 4, second check valve 21, the d mouth of main four-way change-over valve 6, the c mouth of main four-way change-over valve 6, capillary 7, gas-liquid separator 16 successively.
Use the air conditioning control method in the present invention; by regulating the on off state of two four-way change-over valve and magnetic valve etc.; can realize parallel connection heat with defrost run simultaneously, in parallel heat run with accumulation of heat simultaneously, unit heats and unit Defrost operation, realize in Defrost operation process, ensureing that interior machine-processed heat is not shut down.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (7)
1. possess an air-conditioning system for defrost function, comprise off-premises station (A) and indoor set (B), it is characterized in that, in described off-premises station (A), be provided with main four-way change-over valve (6) and accumulation of heat four-way change-over valve (5);
The d mouth of described accumulation of heat four-way change-over valve (5) is connected with the outlet of the first compressor (1), outdoor condenser (8) is in series with successively between the c mouth of described accumulation of heat four-way change-over valve (5) and e mouth, outdoor electrical expansion valve (9), accumulation of heat electric expansion valve (17), phase change heat accumulator (18), the entrance of gas-liquid separator (16) is connected serially to after the s mouth of described accumulation of heat four-way change-over valve (5) is in parallel with the s mouth of described main four-way change-over valve (6), two outlets of described gas-liquid separator (16) are connected to the entrance of the first compressor (1) and the second compressor (2) respectively,
The d mouth of described main four-way change-over valve (6) is connected with the outlet of the second compressor (2), and the e mouth of described main four-way change-over valve (6) is connected to one end of described indoor set (B) by tracheae stop valve (15);
First branch road in parallel with described accumulation of heat electric expansion valve (17) is also provided with between described outdoor electrical expansion valve (9) with described accumulation of heat electric expansion valve (17), described first branch road is in series with high-pressure reservoir (11), liquid pipe stop valve (12) successively, and is connected to the other end of described indoor set (B) by described liquid pipe stop valve (12);
Magnetic valve (19) is parallel with between the d mouth of described accumulation of heat four-way change-over valve (5) and the d mouth of described main four-way change-over valve (6).
2. a kind of air-conditioning system possessing defrost function according to claim 1, is characterized in that, is connected with the first oil eliminator (3) and the first check valve (20) between described first compressor (1) and the d mouth of described accumulation of heat four-way change-over valve (5) in turn.
3. a kind of air-conditioning system possessing defrost function according to claim 2, is characterized in that, is connected with the second oil eliminator (4) and the second check valve (21) between described second compressor (2) and the d mouth of described main four-way change-over valve (6) in turn.
4. a kind of air-conditioning system possessing defrost function according to claim 3, is characterized in that, the two ends of described outdoor electrical expansion valve (9) are parallel with outdoor check valve (10).
5. a kind of air-conditioning system possessing defrost function according to claim 4, is characterized in that, is provided with capillary (7) between the c mouth of described main four-way change-over valve (6) and s mouth.
6. a kind of air-conditioning system possessing defrost function according to claim 5, it is characterized in that, be provided with at least one group of heat supply branch road in described indoor set (B), described heat supply branch road comprises the indoor evaporator (14) and indoor electronic expansion valve (13) that are arranged in series.
7. be applied to a control method for the air-conditioning system possessing defrost function as described in claim 6, it is characterized in that, comprising:
Parallel connection heats and defrost process, comprise: control the energising of described main four-way change-over valve (6), accumulation of heat electric expansion valve (17) normally works, and indoor electronic expansion valve (13) is opened, accumulation of heat four-way change-over valve (5) no power, outdoor electrical expansion valve (9) cuts out;
Unit heats and unit defrost process, comprise: control the energising of described main four-way change-over valve (6), accumulation of heat electric expansion valve (17) normally works, indoor electronic expansion valve (13) is opened, accumulation of heat four-way change-over valve (5) no power, outdoor electrical expansion valve (9) cuts out, and magnetic valve (19) cuts out;
Parallel connection heats and regenerative operation process, comprise: control the energising of described main four-way change-over valve (6), accumulation of heat four-way change-over valve (5) is energized, and accumulation of heat electric expansion valve (17) is opened, outdoor electrical expansion valve (9) normally works, and indoor electronic expansion valve (13) is opened;
Refrigerating operaton process, comprising: control the unlatching of described indoor electronic expansion valve (13), main four-way change-over valve (6) no power, accumulation of heat four-way change-over valve (5) no power, and accumulation of heat electric expansion valve (17) is closed, and outdoor electrical expansion valve (17) cuts out.
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| CN201410006696.9A CN104764240B (en) | 2014-01-07 | 2014-01-07 | A kind of air-conditioning system and its control method for possessing defrosting function |
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| CN105605818A (en) * | 2015-12-10 | 2016-05-25 | 张贝 | Double-working-condition air conditioner |
| CN106766331A (en) * | 2016-12-12 | 2017-05-31 | 广东美的暖通设备有限公司 | Non- reverse defrost multi-connected air conditioning system and air-conditioning |
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| CN104764240B (en) | 2018-04-27 |
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