CN105157117B - A kind of air-conditioning system and its control method - Google Patents
A kind of air-conditioning system and its control method Download PDFInfo
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- CN105157117B CN105157117B CN201510686009.7A CN201510686009A CN105157117B CN 105157117 B CN105157117 B CN 105157117B CN 201510686009 A CN201510686009 A CN 201510686009A CN 105157117 B CN105157117 B CN 105157117B
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- heat exchanger
- compressor
- way valve
- valve
- indoor unit
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
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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
-
- 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
-
- 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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
-
- 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
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- 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)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of air-conditioning system, including outdoor unit (1) and indoor unit (2), the outdoor unit (1) includes compressor (11), outer machine heat exchanger (12) and the first four-way valve (13), the indoor unit (2) includes the First Heat Exchanger (21) being connected with compressor (11), the wherein described indoor unit (2) further includes the second heat exchanger (23), the outdoor unit (1) further includes control valve, two connecting pins of the control valve are respectively connected to the outlet end of one end and the compressor (11) of second heat exchanger (23).Air-conditioning system according to the present invention can avoid the generation that there is the case where causing room temperature fluctuation, even blowing a cold wind over during defrost, improve comfort；Also so that indoor unit still keeps the ability of smaller heat supply in defrost, maintain to continue heat supply；It cannot be only used for defrost process, can be also used for the processes such as refrigeration, heating.The invention further relates to the methods controlled using the system.
Description
Technical field
The invention belongs to air-conditioning technical fields, and in particular to a kind of air-conditioning system and its control method, more particularly to defrosting
Control method.
Background technology
Existing heat pump air conditioner, including heat pump split air conditioner, heat pump multi-connected machine, heat under the conditions of winter low temperature and high humidity
When, outer machine heat exchanger generally can frosting.It causes outer fan delivery to reduce after frosting, heat transfer effect variation, causes indoor can not be just
Normal heat supply.If do not handle the frost on heat exchanger, interior chance always can not heat supply, long operational time may result in compressor damage
It is bad.So it is universal at present all can first melting away outer machine heat exchanger, then heated.
The control technology that heat pump air conditioner defrosting at present generally uses is：It is outer in order to rapidly remove after outer machine heat exchanger frosting
Machine heat exchanger frost, four-way valve can commutate, and compressor high temperature and pressure refrigerant first flows to outer machine heat exchanger, and the frost for being attached to heat exchanger is melted
Change.Refrigerant flows to interior pusher side again, becomes low temperature and low pressure liquid after throttling, flows to interior machine heat exchanger, draws heat in room,
Interior machine is refrigeration at this time.It commutates after frost melts, then by four-way valve, makes interior machine operation heating, as shown in Figure 1.
The major defect of said program is：During defrost, indoor unit is actually to freeze, and interior machine heat exchanger can draw room
Interior heat, causes room temperature to fluctuate, or even can blow a cold wind over, extreme influence comfort.
It causes room temperature to fluctuate since heat pump air conditioner in the prior art exists during defrost, or even can blow a cold wind over,
The technical issues of extreme influence comfort, therefore research and design of the present invention goes out a kind of air-conditioning system and its control method, especially relates to
And the control method of defrosting.
Invention content
Therefore, the technical problem to be solved in the present invention is that overcoming air-conditioning in the prior art to exist during defrost causes
Room temperature fluctuates, or even can blow a cold wind over, the defect of extreme influence comfort, to provide a kind of air-conditioning system and its controlling party
Method, more particularly to defrosting control method.
The present invention provides a kind of air-conditioning system, including outdoor unit and indoor unit, and the outdoor unit includes that compressor, outer machine change
Hot device and the first four-way valve, the indoor unit includes the First Heat Exchanger being connected with compressor, wherein the indoor unit further includes
Second heat exchanger, the outdoor unit further include control valve, and two in the control valve connecting pin is respectively connected to described second
The outlet end of one end of heat exchanger and the compressor.
Preferably, the outdoor unit further includes the first four-way valve, the First Heat Exchanger by first four-way valve with
The compressor is connected；The control valve is the second four-way valve, and other two connecting pin of second four-way valve phase each other
The input end of the compressor is coupled to after even.
Preferably, the indoor unit further includes the first throttle valve being connected with the First Heat Exchanger and is changed with described second
The connected second throttle of the other end of hot device.
Preferably, the other end of the second throttle and the one end of the first throttle valve far from the First Heat Exchanger
It is connected.
Preferably, further include being arranged on the First Heat Exchanger and/or second heat exchanger in the indoor unit
Fan.
Preferably, the indoor unit is multiple, and each indoor unit includes second heat exchanger and one second
Throttle valve.
Preferably, the outdoor unit further includes outer machine throttle valve, and one end of the outer machine throttle valve exchanges heat with the outer machine
Device one end is connected.
Preferably, when indoor unit includes first throttle valve and second throttle, the other end of the outer machine throttle valve connects
It is connected on the pipeline between the first throttle valve of the indoor unit and the second throttle.
Preferably, when outdoor unit includes the first four-way valve, four connecting pins of first four-way valve are connected respectively to
The First Heat Exchanger of the indoor unit, the outlet end of the compressor, the input end of the compressor, the outer machine heat exchanger
The other end.
Preferably, the outdoor unit further includes the gas-liquid separator for being connected to the compressor inlet.
The present invention also provides a kind of control method of air-conditioning system, using air-conditioning system above-mentioned carry out indoor refrigeration,
The control and regulation of heating or defrosting.
Preferably, when system defrost so that the outlet end of compressor is connected with the outer machine heat exchanger so that compressor
Input end be connected with the First Heat Exchanger after control valve, adjust the control valve and the outlet end of compressor passed through
It is connected with second heat exchanger after control valve.
Preferably, when the outdoor unit further includes the first four-way valve, and the control valve is the second four-way valve, work as systematization
When white, adjust first four-way valve make the outlet end of compressor after the first four-way valve with the outer machine heat exchanger phase
Even so that the input end of compressor is connected after the first four-way valve with the First Heat Exchanger, adjusts second four-way valve
So that the outlet end of compressor is connected after the second four-way valve with second heat exchanger.
When being heated, adjusting the control valve makes second heat exchanger pass through control valve and compressor outlet
End is connected, and the outlet end of compressor is connected with the First Heat Exchanger so that the input end of compressor and the outer machine
Heat exchanger is connected.
Preferably, when the outdoor unit further includes the first four-way valve, and the control valve is the second four-way valve, when need into
When row heating, adjusts second four-way valve second heat exchanger is made to pass through the second four-way valve and be connected with compressor outlet,
Adjusting first four-way valve makes the outlet end of compressor be connected with the First Heat Exchanger after the first four-way valve so that
The input end of compressor is connected after the first four-way valve with the outer machine heat exchanger.
When being freezed so that the outlet end of compressor is connected with the outer machine heat exchanger so that compressor
Input end is connected with the First Heat Exchanger, adjust the control valve make the input end of compressor after control valve with it is described
Second heat exchanger is connected.
Preferably, when the outdoor unit further includes the first four-way valve, and the control valve is the second four-way valve, when need into
When row refrigeration, adjust first four-way valve make the outlet end of compressor after the first four-way valve with the outer machine heat exchanger
It is connected so that the input end of compressor is connected after the first four-way valve with the First Heat Exchanger, adjusts second four-way
Valve makes the input end of compressor be connected with second heat exchanger after the second four-way valve.
The control method of air-conditioning system and air-conditioning system provided by the invention has the advantages that：
1. air-conditioning system can effectively be avoided to there are the feelings that causes room temperature fluctuation, can even blow a cold wind over during defrost
The generation of condition, is effectively improved comfort；
2. the ability that air-conditioning system indoor unit in defrost can also be made still to keep smaller heat supply remains lasting and supplies
Heat；
3. air-conditioning system according to the present invention not only can only be used to defrost process, refrigeration can be also used for, heating waited
Journey, effect are good.
Description of the drawings
Fig. 1 is the structural schematic diagram of the air-conditioning system of the prior art；
Fig. 2 is the structural schematic diagram of the air-conditioning system of the present invention.
Reference numeral is expressed as in figure：
1-outdoor unit, 2-indoor units, 11-compressors, 12-outer machine heat exchangers, the 13-the first four-way valve, 14-the second
Four-way valve, 15-outer machine throttle valves, 16-gas-liquid separators, 21-First Heat Exchangers, 22-first throttle valves, 23-the second changes
Hot device, 24-second throttle, 25-fans.
Specific implementation mode
It is existing common heat pump air conditioning system schematic diagram as shown in Figure 1.When unit defrost, refrigerant flow direction such as the side Fig. 1
Shown in arrow.Compressor high temperature and pressure refrigerant first flows to outer machine heat exchanger, and the frost for being attached to heat exchanger is melted.Refrigerant flows to again
Interior pusher side becomes low temperature and low pressure liquid after throttling, flows to interior machine heat exchanger, draws heat in room, and interior machine is system at this time
Cold.It commutates after frost melts, then by four-way valve, makes interior machine operation heating.
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Implement below
Example is not limited to protection scope of the present invention for illustrating the present invention.
As shown in Fig. 2, the present invention provides a kind of air-conditioning system, including outdoor unit 1 and indoor unit 2, the outdoor unit 1 include
Compressor 11, outer machine heat exchanger 12 and the first four-way valve 13, the indoor unit 2 include the First Heat Exchanger being connected with compressor 11
21, wherein the indoor unit 2 further includes the second heat exchanger 23, and the outdoor unit 1 further includes control valve, in the control valve
Two connecting pins be respectively connected to one end of second heat exchanger 23, the compressor 11 outlet end.
By adding a control valve in outdoor unit, a heat exchanger (the second heat exchanger 23) is added in machine indoors,
It enables to during defrost, the refrigerant of compressor outlet is directed into the second heat exchanger by control valve, form heating
Effect, to which the First Heat Exchanger to refrigeration heat absorption generates the effect of heat release and heating, (room temperature wind passes through First Heat Exchanger 21
Afterwards, become cold wind, using the second heat exchanger 23, wind is heated so that system indoor unit in defrost is not blown a cold wind over, still again
Keep smaller heat supply), and then can ensure that indoor unit does not go out cold wind when defrosting, it avoids air-conditioning system from existing during defrost and causes
The case where room temperature is fluctuated, can even be blown a cold wind over, is effectively improved comfort；Also so that air-conditioning system is in defrost
Indoor unit still keeps smaller heat supply, maintains lasting heating；In addition increased second heat exchanger not only can only be used to defrost, may be used also
For freezing, heating isotype.
Preferably, the outdoor unit 1 further includes the first four-way valve 13, and the First Heat Exchanger 21 passes through first four-way
Valve 13 is connected with the compressor 11；The control valve be the second four-way valve 14, and second four-way valve 14 other two
Connecting pin is coupled to the input end of the compressor 11 after being connected with each other.By using the shape of the first four-way valve and the second four-way valve
Formula can efficiently and pipeline be simply completed the piping connection between each component.Can ensure in this way the second heat exchanger no matter
It can be connected to the import and export end of compressor in the case of refrigeration, heating or defrosting, form a complete circulation loop,
It is to be defrosted, freezed or heated to provide precondition.
It enables to during defrost, the refrigerant of compressor outlet is directed by the second heat exchanger by the second four-way valve
In, heating effect is formed, to which the First Heat Exchanger to refrigeration heat absorption generates the effect of heat release and heating, (room temperature wind is by the
After one heat exchanger 21, become cold wind, using the second heat exchanger 23, wind is heated so that system again, and indoor unit is not in defrost
Blow a cold wind over, still keep smaller heat supply), and then can ensure that indoor unit does not go out cold wind when defrosting, avoids air-conditioning system in defrost
There is the case where causing room temperature fluctuation, even blowing a cold wind in period, be effectively improved comfort；Also so that air-conditioning
System indoor unit in defrost still keeps smaller heat supply, maintains lasting heating；In addition increased second heat exchanger not only may be used
For defrost, refrigeration, heating isotype can be also used for.
Preferably, the indoor unit 2 further include the first throttle valve 22 being connected with the First Heat Exchanger 23 and with it is described
The connected second throttle 24 of the other end of second heat exchanger 23.It is enabled to by the way that first throttle valve and second throttle is arranged
Refrigerant can form certain reducing pressure by regulating flow effect when by this section of pipeline, and the evaporation endothermic for refrigerant next step provides
Precondition, and for two-way even multichannel refrigerant converge provide lower pressure converge condition, ensure that
The operation of air-conditioning system normal table.
Preferably, the other end of the second throttle 24 and the first throttle valve 22 are far from the First Heat Exchanger 21
One end be connected.In this way pipeline setting enable the second throttle other end refrigerant normally with first segment
Stream valve carries out converging effect far from First Heat Exchanger one end, is to be defrosted, heated or freezed to provide precondition.When except
When white, refrigerant flows to one end (pressure of the first throttle valve far from First Heat Exchanger from the second throttle other end (pressure is high)
It is low)；When heating, pressure at two ends is identical, is converged；When refrigeration, pressure at two ends is identical, forms branch.
Preferably, further include being arranged in the First Heat Exchanger 21 and/or second heat exchanger 23 in the indoor unit 2
On fan 25.Setting fan can play the role of auxiliary heat dissipation by reinforcing Diffusion of gas stream and reinforce heat exchange.
Preferably, the indoor unit 2 is multiple, and each indoor unit 2 includes second heat exchanger 23 and one
Second throttle 24.It can be directed to the different interior in many places in this way to be heated or freezed, and ensure many places when defrosting
Different interiors, which can be realized, does not generate temperature fluctuation, avoids generation from cold wind occur, influences comfort.Number may depend on interior
The required environment number for carrying out heat exchange.
Preferably, the outdoor unit 1 further includes outer machine throttle valve 15, one end and the outer machine of the outer machine throttle valve 15
12 one end of heat exchanger is connected.It can be saved for outer machine refrigerant pipeline by the outer machine throttle valve being connected with outer machine heat exchanger
The effect of decompression is flowed, guarantee effectively realizes refrigeration, heating or the purpose of defrosting.
Preferably, when indoor unit 2 include first throttle valve 22 and second throttle 24 when, the outer machine throttle valve 15 it is another
One end is connected on the pipeline between the first throttle valve 22 of the indoor unit 2 and the second throttle 24.Have in this way
The connection relation for realizing to effect the refrigerant line between outdoor unit and indoor unit, circulates in which ensure that refrigerant, protects
Card effectively realizes refrigeration, heating or the purpose of defrosting.
Preferably, when outdoor unit 1 includes the first four-way valve 13, four connecting pins of first four-way valve 13 connect respectively
It is connected to the input end, described of the First Heat Exchanger 21 of the indoor unit 2, the outlet end of the compressor 11, the compressor 11
The other end of outer machine heat exchanger 12.Compressor and outer machine heat exchanger and indoor unit first are had effectively achieved by the first four-way valve
The connection of pipeline between heat exchanger is to realize that refrigeration, heating or defrosting provide condition, and can pass through switching first
The pipeline of four-way valve reaches effective switching between refrigeration, heating and defrosting.
Preferably, the outdoor unit 1 further includes the gas-liquid separator 16 for being connected to 11 input end of the compressor.By setting
Centrifugation between gas-liquid can be effectively realized by setting gas-liquid separator, ensure the drying for entering the refrigerant in compressor
Degree ensures the operation that air-conditioning system can be safe and reliable.
The present invention also provides a kind of control method of air-conditioning system, using air-conditioning system above-mentioned carry out indoor refrigeration,
The control and regulation of heating or defrosting.It can ensure that indoor unit does not go out cold wind in defrosting, avoids sky by using the air-conditioning system
There is the case where causing room temperature fluctuation, even blowing a cold wind in adjusting system, be effectively improved comfortable during defrost
Property；Also so that air-conditioning system indoor unit in defrost still keeps smaller heat supply, lasting heating is maintained；In addition it increased second changes
Hot device not only can only be used to defrost, can be also used for refrigeration, heating isotype.
Preferably, when system defrost so that the outlet end of compressor 11 is connected with the outer machine heat exchanger 12 so that pressure
The input end of contracting machine 11 is connected after control valve with the First Heat Exchanger 21, adjusts the control valve and makes compressor 11
Outlet end is connected after control valve with second heat exchanger 23.External machine heat exchanger defrost can be effectively achieved in this way
Purpose.
Preferably, when the outdoor unit 1 further includes the first four-way valve 13, and the control valve is the second four-way valve 14, when
When air-conditioning system defrost, adjust first four-way valve 13 so that compressor 11 outlet end after the first four-way valve 13 with institute
State outer machine heat exchanger 12 be connected so that the input end of compressor 11 after the first four-way valve 13 with 21 phase of the First Heat Exchanger
Even, adjust second four-way valve 14 so that compressor 11 outlet end after the second four-way valve 14 with second heat exchanger
23 are connected.
When defrost, refrigerant is flowed to as shown in Fig. 2 direction arrows.Compressor high temperature refrigerant divides two-way：The one or four is flowed to all the way
Port valve 13 is 12 defrosting of outer machine heat exchanger, indoor unit 2 is flowed to again after refrigerant condensation by outer machine heat exchanger 12；Another way flows to
Second four-way valve 14, by the second heat exchanger 23, which condenses heat release in the second heat exchanger 23, is from First Heat Exchanger 21
The cold air heating blown；Then two-way converges through first throttle valve 22, and refrigerant becomes low temperature and low pressure liquid after being throttled, flow direction
First Heat Exchanger 21 draws the heat in room.It can ensure in this way when not outer machine heat exchanger defrost or defrosting, due to
The heat effect of second heat exchanger so that interior is unlikely to be completely in the state for being evaporated heat absorption, just can be effectively prevented
Indoor temperature, which is crossed, to be greatly reduced, the generation for the phenomenon that effectively preventing the fluctuation of room internal temperature, or even blowing a cold wind over,
Comfort is greatly improved, then refrigerant flows to vapour liquid separator by four-way valve 1 and returns compressor, such circular flow.
Indoor temperature is unlikely to reduce when having effectively achieved defrost, the case where avoiding room internal temperature fluctuation, even blow a cold wind over
Generation, to improve comfort.
Preferably, when being heated, adjust the control valve make second heat exchanger 23 by control valve with
11 outlet end of compressor is connected, and the outlet end of compressor 11 is connected with the First Heat Exchanger 21 so that compressor 11
Input end be connected with the outer machine heat exchanger 12.The purpose and effect to indoor heating can be effectively achieved in this way.
Preferably, when the outdoor unit 1 further includes the first four-way valve 13, and the control valve is the second four-way valve 14, when
When being heated, adjusting second four-way valve 14 makes second heat exchanger 23 pass through the second four-way valve 14 and compressor
11 outlet ends are connected, and form heating, adjust first four-way valve 13 so that the first four-way valve is passed through in the outlet end of compressor 11
It is connected with the First Heat Exchanger 21 after 13, the First Heat Exchanger 21 is made to be heated so that the input end of compressor 11 passes through
It is connected with the outer machine heat exchanger 12 after crossing the first four-way valve 14, so that the outer machine heat exchanger 12 is carried out refrigeration heat absorption, at this time room
Interior machine forms maximum heating capacity, and outdoor unit forms sweat cooling heat absorption, achievees the purpose that carry out heating adjusting to interior.
(indoor heating) at this time, compressor high temperature refrigerant divide two-way：The first four-way valve 13 is flowed to all the way, by the first heat exchange
Device 21, is heated；Another way flows to the second four-way valve 14, by the second heat exchanger 23；Two-way refrigerant is all cold in machine indoors
Solidifying heat release, is used for room heat supply.Two-way refrigerant converges at the big valve of interior machine, flows to the throttle valve of outer machine, after throttling, low temperature is low
Pressure liquid refrigerants is evaporated in outer machine heat exchanger, eventually passes back to vapour liquid separator 16, compressor is again from 16 air-breathing of liquid/gas separator, so
Cycle, is heated.
I.e. after having changed frost, the second four-way valve 14 does not switch, and still keeps that the second heat exchanger 23 is allowed to heat, the first four-way valve
13 switch over, and First Heat Exchanger 21 is allowed to be heated.Compressor high temperature refrigerant divides two-way：The first four-way valve 13 is flowed to all the way,
By First Heat Exchanger 21, heated；Another way flows to the second four-way valve 14, by the second heat exchanger 23；Two-way refrigerant is all
Machine condenses indoors, is used for room heat supply.Two-way refrigerant converges at the big valve of machine indoors, flows to the throttle valve of outdoor unit, saves
After stream, low-temp low-pressure liquid refrigerants is evaporated in outer machine heat exchanger 12, eventually passes back to vapour point 16, and compressor 11 is inhaled from vapour point 16 again
Gas is so recycled, is heated.
Preferably, when being freezed so that the outlet end of compressor 11 is connected with the outer machine heat exchanger 12, makes
The input end for obtaining compressor 11 is connected with the First Heat Exchanger 21, adjusts the control valve and the input end of compressor 11 is passed through
It is connected with second heat exchanger 23 after crossing control valve.The purpose and effect to indoor refrigeration can be effectively achieved in this way.
Preferably, when the outdoor unit 1 further includes the first four-way valve 13, and the control valve is the second four-way valve 14, when
When being freezed, adjust first four-way valve 13 so that compressor 11 outlet end after the first four-way valve 13 with institute
State outer machine heat exchanger 12 be connected so that the input end of compressor 11 after the first four-way valve 13 with 21 phase of the First Heat Exchanger
Even, adjust second four-way valve 14 so that compressor 11 input end after the second four-way valve 14 with second heat exchanger
23 are connected.To achieve the purpose that freeze to interior.
Indoors when machine operation refrigeration mode, the second heat exchanger 23 can be switched to steaming by the second four-way valve 14 of outdoor unit
Hair device freezes；Indoors when machine operation heating mode, the second four-way valve 14 of outdoor unit can cut the second heat exchanger 23
Condenser is changed to be heated.When outdoor unit needs defrost, interior machine heat exchanger 1 is evaporator, heat exchanger 2 is condenser, is changed
Hot device 2 is the air heating to come from heat exchanger 1, prevents cold wind from blowing out indoor unit.
The present invention is mainly when solving outdoor unit defrosting, and indoor unit cannot continue heating, and absorption room heat is even blown instead
The situation of cold wind, comfort difference.
For the present invention because of the presence of the second four-way valve 14, the second heat exchanger 23 can be with any switching laws at refrigeration and heating shape
State.So situations such as defrost situation can be applied not only to, can be also used for refrigeration, heating.
Those skilled in the art will readily recognize that under the premise of not conflicting, above-mentioned each advantageous manner can be free
Ground combination, superposition.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.With
Only it is the preferred embodiment of the present invention described in upper, it is noted that for those skilled in the art, not
Under the premise of being detached from the technology of the present invention principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as this
The protection domain of invention.
Claims (10)
1. a kind of control method of air-conditioning system, it is characterised in that：The air-conditioning system：Including outdoor unit (1) and indoor unit
(2), the outdoor unit (1) includes compressor (11), outer machine heat exchanger (12), and the indoor unit (2) includes and compressor (11)
Connected First Heat Exchanger (21), it is characterised in that：The indoor unit (2) further includes the second heat exchanger (23), the outdoor unit
(1) further include control valve, two connecting pins of the control valve are respectively connected to one end and the institute of second heat exchanger (23)
State the outlet end of compressor (11)；
The outdoor unit (1) further includes the first four-way valve (13), and the First Heat Exchanger (21) passes through first four-way valve
(13) it is connected with the compressor (11)；The control valve is the second four-way valve (14), and second four-way valve (14) is another
Outer two connecting pins are coupled to the input end of the compressor (11) after being connected with each other；
The indoor unit (2) further includes the first throttle valve (22) being connected with the First Heat Exchanger (23) and is changed with described second
The connected second throttle (24) of the other end of hot device (23)；The other end of the second throttle (24) and the first throttle
The one end of valve (22) far from the First Heat Exchanger (21) is connected；
The indoor unit (2) is multiple, and each indoor unit (2) includes second heat exchanger (23) and one second section
Flow valve (24)；
When system defrost, first four-way valve (13) is adjusted so that the first four-way valve is passed through in the outlet end of compressor (11)
(13) it is connected afterwards with the outer machine heat exchanger (12) so that the input end of compressor (11) is after the first four-way valve (13) and institute
It states First Heat Exchanger (21) to be connected, adjusts second four-way valve (14) so that the second four-way is passed through in the outlet end of compressor (11)
Valve (14) is connected with second heat exchanger (23) afterwards.
2. control method according to claim 1, it is characterised in that：Further include being arranged described in the indoor unit (2)
Fan (25) on First Heat Exchanger (21) and/or second heat exchanger (23).
3. according to the control method described in one of claim 1-2, it is characterised in that：The outdoor unit (1) further includes outer machine section
Valve (15) is flowed, one end of the outer machine throttle valve (15) is connected with described outer machine heat exchanger (12) one end.
4. control method according to claim 3, it is characterised in that：When indoor unit (2) include first throttle valve (22) and
When second throttle (24), the other end of the outer machine throttle valve (15) is connected to the first throttle of the indoor unit (2)
On pipeline between valve (22) and the second throttle (24).
5. control method according to claim 3, it is characterised in that：When outdoor unit (1) includes the first four-way valve (13),
Four connecting pins of first four-way valve (13) are connected respectively to the First Heat Exchanger (21) of the indoor unit (2), the pressure
The outlet end of contracting machine (11), the input end of the compressor (11), the outer machine heat exchanger (12) the other end.
6. according to the control method described in one of claim 1-2, it is characterised in that：The outdoor unit (1) further includes being connected to
The gas-liquid separator (16) of compressor (11) input end.
7. the control method of air-conditioning system according to claim 1, it is characterised in that：When being heated, institute is adjusted
Stating control valve makes second heat exchanger (23) be connected with compressor (11) outlet end by control valve, and makes compressor (11)
Outlet end be connected with the First Heat Exchanger (21) so that the input end of compressor (11) and outer machine heat exchanger (12) phase
Even.
8. the control method of air-conditioning system according to claim 7, it is characterised in that：When the outdoor unit further includes the one or four
Port valve, when the control valve is the second four-way valve, when being heated, adjusting second four-way valve (14) makes described the
Two heat exchangers (23) are connected by the second four-way valve (14) with compressor (11) outlet end, and adjusting first four-way valve (13) makes
The outlet end for obtaining compressor (11) is connected after the first four-way valve (13) with the First Heat Exchanger (21) so that compressor
(11) input end is connected after the first four-way valve (13) with the outer machine heat exchanger (12).
9. the control method of air-conditioning system according to claim 1, it is characterised in that：When being freezed so that pressure
The outlet end of contracting machine (11) is connected with the outer machine heat exchanger (12) so that the input end of compressor (11) exchanges heat with described first
Device (21) is connected, adjust the control valve make the input end of compressor (11) after control valve with second heat exchanger
(23) it is connected.
10. the control method of air-conditioning system according to claim 9, it is characterised in that：When the outdoor unit further includes first
Four-way valve when the control valve is the second four-way valve, when being freezed, adjusts first four-way valve (13) so that pressure
The outlet end of contracting machine (11) is connected after the first four-way valve (13) with the outer machine heat exchanger (12) so that compressor (11)
Input end is connected after the first four-way valve (13) with the First Heat Exchanger (21), adjusts second four-way valve (14) and makes
The input end of compressor (11) is connected after the second four-way valve (14) with second heat exchanger (23).
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| CN201510686009.7A CN105157117B (en) | 2015-10-20 | 2015-10-20 | A kind of air-conditioning system and its control method |
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| CN201510686009.7A CN105157117B (en) | 2015-10-20 | 2015-10-20 | A kind of air-conditioning system and its control method |
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| CN105157117B true CN105157117B (en) | 2018-10-26 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926072B (en) * | 2019-11-21 | 2021-07-27 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and defrosting control method, control device and storage medium thereof |
| CN111140994A (en) * | 2019-12-27 | 2020-05-12 | 海信（山东）空调有限公司 | Control method and device for defrosting of air conditioner, storage medium and air conditioner |
| CN114061055B (en) * | 2020-07-28 | 2023-03-31 | 广东美的制冷设备有限公司 | Air conditioner, control method, air conditioner control device and readable storage medium |
| CN114322206B (en) * | 2020-09-29 | 2023-05-30 | 美的集团武汉制冷设备有限公司 | Multi-split air conditioner, defrosting method thereof, control device and storage medium |
| CN112361474A (en) * | 2020-11-17 | 2021-02-12 | 南京天加环境科技有限公司 | Novel dehumidification and reheating multi-connected air conditioning system and control method thereof |
| CN113531711B (en) * | 2021-07-28 | 2022-12-06 | 南京天加环境科技有限公司 | Dehumidification reheating system and control method thereof |
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| CN105157117A (en) | 2015-12-16 |
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