CN105157117A - Air conditioning system and control method thereof - Google Patents
Air conditioning system and control method thereof Download PDFInfo
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- CN105157117A CN105157117A CN201510686009.7A CN201510686009A CN105157117A CN 105157117 A CN105157117 A CN 105157117A CN 201510686009 A CN201510686009 A CN 201510686009A CN 105157117 A CN105157117 A CN 105157117A
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- heat exchanger
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- valve
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000010257 thawing Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims description 14
- 230000008014 freezing Effects 0.000 claims description 6
- 238000007710 freezing Methods 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 12
- 239000003507 refrigerant Substances 0.000 description 21
- 238000005057 refrigeration Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 13
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
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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
-
- 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
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)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioning system which comprises an outdoor unit (1) and an indoor unit (2), wherein the outdoor unit (1) comprises a compressor (11), an outdoor unit heat exchanger (12) and a first four-way valve (13), the indoor unit (2) comprises a first heat exchanger (21) connected with the compressor (11), the indoor unit (2) further comprises a second heat exchanger (23), the outdoor unit (1) further comprises a control valve, and two connecting ends of the control valve are respectively connected to one end of the second heat exchanger (23) and the outlet end of the compressor (11). According to the air conditioning system, the situations that room temperature fluctuates and even cold air can be blown during defrosting can be avoided, and the comfort is improved; the indoor unit still keeps small heat supply capacity during defrosting and maintains continuous heat supply; the method can be used for defrosting process, and can also be used for refrigerating and heating processes. The invention also relates to a control method using the system.
Description
Technical field
The invention belongs to air-conditioning technical field, be specifically related to a kind of air-conditioning system and control method thereof, particularly relate to the control method of defrosting.
Background technology
Existing heat pump air conditioner, comprises heat pump split air conditioner, heat pump multi-connected machine, and when heating under low temperature and high humidity condition winter, outer machine heat exchanger generally can frosting.Cause after frosting that outer fan delivery reduces, heat transfer effect is deteriorated, cause indoor cannot normally heat supply.If do not process the frost on heat exchanger, interior chance always cannot heat supply, and long operational time may cause compressor damage.So at present general all can melting away first by outer machine heat exchanger, then to heat.
The control technology that current heat pump air conditioner defrosting generally adopts is: after outer machine heat exchanger frosting, and in order to remove outer machine heat exchanger frost fast, cross valve can commutate, and compressor HTHP refrigerant first flows to outer machine heat exchanger, is melted by the frost being attached to heat exchanger.Refrigerant flows to interior pusher side again, after throttling, become Low temperature low pressure liquid, machine heat exchanger in flowing to, and draws heat in room, and now, machine is refrigeration.After frost melts, then cross valve is commutated, interior machine is run and heats, as shown in Figure 1.
The major defect of such scheme is: during defrost, and indoor set is actually refrigeration, and interior machine heat exchanger can draw heat in room, causes room temperature to fluctuate, and even can blow a cold wind over, extreme influence comfortableness.
Room temperature is caused to fluctuate because heat pump air conditioner of the prior art exists during defrost, even can blow a cold wind over, the technical problem of extreme influence comfortableness, therefore research and design of the present invention goes out a kind of air-conditioning system and control method thereof, particularly relates to the control method of defrosting.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is to overcome air-conditioning of the prior art to be existed and causes room temperature to fluctuate during defrost, even can blow a cold wind over, the defect of extreme influence comfortableness, thus a kind of air-conditioning system and control method thereof are provided, particularly relate to the control method of defrosting.
The invention provides a kind of air-conditioning system, comprise off-premises station and indoor set, described off-premises station comprises compressor, outer machine heat exchanger and the first cross valve, described indoor set comprises the First Heat Exchanger be connected with compressor, wherein said indoor set also comprises the second heat exchanger, described off-premises station also comprises control valve, and two links in described control valve are connected to one end of described second heat exchanger and the port of export of described compressor respectively.
Preferably, described off-premises station also comprises the first cross valve, and described First Heat Exchanger is connected with described compressor by described first cross valve; Described control valve is the second cross valve, and two other link of described second cross valve links the entrance point of described compressor again after being connected with each other.
Preferably, described indoor set also comprises the first throttle valve be connected with described First Heat Exchanger and the second throttle be connected with the other end of described second heat exchanger.
Preferably, the other end of described second throttle is connected with described first throttle valve one end away from described First Heat Exchanger.
Preferably, the fan be arranged on described First Heat Exchanger and/or described second heat exchanger is also comprised in described indoor set.
Preferably, described indoor set is multiple, and each described indoor set includes second heat exchanger and a second throttle.
Preferably, described off-premises station also comprises outer machine choke valve, and one end of described outer machine choke valve is connected with described outer machine heat exchanger one end.
Preferably, when indoor set comprises first throttle valve and second throttle, the other end of described outer machine choke valve is connected on the pipeline between the described first throttle valve of described indoor set and described second throttle.
Preferably, when off-premises station comprises the first cross valve, four links of described first cross valve are connected respectively to the First Heat Exchanger of described indoor set, the port of export of described compressor, the entrance point of described compressor, the other end of described outer machine heat exchanger.
Preferably, described off-premises station also comprises the gas-liquid separator being connected to described compressor inlet.
The present invention also provides a kind of control method of air-conditioning system, its control and regulation utilizing aforesaid air-conditioning system to carry out indoor refrigeration, heat or defrost.
Preferably, when system defrost, the port of export of compressor is connected with described outer machine heat exchanger, the entrance point of compressor is connected with described First Heat Exchanger after control valve, regulate described control valve that the port of export of compressor is connected with described second heat exchanger after control valve.
Preferably, when described off-premises station also comprises the first cross valve, when described control valve is the second cross valve, when system defrost, regulate described first cross valve that the port of export of compressor is connected with described outer machine heat exchanger after the first cross valve, the entrance point of compressor is connected with described First Heat Exchanger after the first cross valve, regulates described second cross valve that the port of export of compressor is connected with described second heat exchanger after the second cross valve.
When needs heat, regulate described control valve that described second heat exchanger is connected with compressor outlet by control valve, and the port of export of compressor is connected with described First Heat Exchanger, the entrance point of compressor is connected with described outer machine heat exchanger.
Preferably, when described off-premises station also comprises the first cross valve, when described control valve is the second cross valve, when needs heat, regulate described second cross valve that described second heat exchanger is connected with compressor outlet by the second cross valve, regulate described first cross valve that the port of export of compressor is connected with described First Heat Exchanger after the first cross valve, the entrance point of compressor is connected with described outer machine heat exchanger after the first cross valve.
When needs freeze, the port of export of compressor is connected with described outer machine heat exchanger, the entrance point of compressor is connected with described First Heat Exchanger, regulates described control valve that the entrance point of compressor is connected with described second heat exchanger after control valve.
Preferably, when described off-premises station also comprises the first cross valve, when described control valve is the second cross valve, when needs freeze, regulate described first cross valve that the port of export of compressor is connected with described outer machine heat exchanger after the first cross valve, the entrance point of compressor is connected with described First Heat Exchanger after the first cross valve, regulates described second cross valve that the entrance point of compressor is connected with described second heat exchanger after the second cross valve.
The control method of air-conditioning system provided by the invention and air-conditioning system has following beneficial effect:
1. the generation of the situation can effectively avoid air-conditioning system to exist during defrost causing room temperature to fluctuate, even blowing a cold wind over, improves comfortableness effectively;
2. air-conditioning system indoor set when defrost can also be made still to keep the ability of less heat supply, maintain and continue heat supply;
3. according to air-conditioning system of the present invention, it not only can be used for defrost process, and can also be used for processes such as freezing, heat, effect is all good.
Accompanying drawing explanation
Fig. 1 is the structural representation of the air-conditioning system of prior art;
Fig. 2 is the structural representation of air-conditioning system of the present invention.
In figure, Reference numeral is expressed as:
1-off-premises station, 2-indoor set, 11-compressor, 12-outer machine heat exchanger, the 13-the first cross valve, 14-the second cross valve, 15-outer machine choke valve, 16-gas-liquid separator, 21-First Heat Exchanger, 22-first throttle valve, the 23-the second heat exchanger, 24-second throttle, 25-fan.
Detailed description of the invention
Be illustrated in figure 1 existing ordinary hot pump air conditioner system schematic diagram.When unit defrost, refrigerant flows to as shown in Fig. 1 direction arrow.Compressor HTHP refrigerant first flows to outer machine heat exchanger, is melted by the frost being attached to heat exchanger.Refrigerant flows to interior pusher side again, after throttling, become Low temperature low pressure liquid, machine heat exchanger in flowing to, and draws heat in room, and now, machine is refrigeration.After frost melts, then cross valve is commutated, interior machine is run and heats.
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 2, the invention provides a kind of air-conditioning system, comprise off-premises station 1 and indoor set 2, described off-premises station 1 comprises compressor 11, outer machine heat exchanger 12 and the first cross valve 13, described indoor set 2 comprises the First Heat Exchanger 21 be connected with compressor 11, and wherein, described indoor set 2 also comprises the second heat exchanger 23, described off-premises station 1 also comprises control valve, and two links in described control valve are connected to described one end of second heat exchanger 23, the port of export of described compressor 11 respectively.
By setting up a control valve in off-premises station, a heat exchanger (the second heat exchanger 23) is set up in indoor set, can make during defrost, by control valve, the cold-producing medium of compressor outlet is directed in the second heat exchanger, formation heats effect, thus the First Heat Exchanger of refrigeration heat absorption is produced to the effect of heat release and intensification, (normal temperature wind is after First Heat Exchanger 21, become cold wind, again through the second heat exchanger 23, wind is heated again, system indoor set when defrost is not blown a cold wind over, still keep less heat supply), and then indoor set does not go out cold wind when can ensure to defrost, avoiding air-conditioning system to exist during defrost causes room temperature to fluctuate, situation about even can blow a cold wind over occurs, effectively improve comfortableness, also make air-conditioning system indoor set when defrost still keep less heat supply, continue to heat, the second heat exchanger increased in addition not only can be used for defrost, can also be used for refrigeration, heat isotype.
Preferably, described off-premises station 1 also comprises the first cross valve 13, and described First Heat Exchanger 21 is connected with described compressor 11 by described first cross valve 13; Described control valve is the second cross valve 14, and two other link of described second cross valve 14 links the entrance point of described compressor 11 again after being connected with each other.By adopting the form of the first cross valve and the second cross valve can efficiently and pipeline completes pipeline between each parts simply connects.Can ensure like this second heat exchanger no matter when freezing, the import and export end of compressor can be connected to when heating or defrost, forming a complete closed circuit, providing precondition for carrying out defrosting, freeze or heating.
Can make during defrost, by the second cross valve, the cold-producing medium of compressor outlet is directed in the second heat exchanger, formation heats effect, thus the First Heat Exchanger of refrigeration heat absorption is produced to the effect of heat release and intensification, (normal temperature wind is after First Heat Exchanger 21, become cold wind, again through the second heat exchanger 23, wind is heated again, system indoor set when defrost is not blown a cold wind over, still keep less heat supply), and then indoor set does not go out cold wind when can ensure to defrost, avoiding air-conditioning system to exist during defrost causes room temperature to fluctuate, situation about even can blow a cold wind over occurs, effectively improve comfortableness, also make air-conditioning system indoor set when defrost still keep less heat supply, continue to heat, the second heat exchanger increased in addition not only can be used for defrost, can also be used for refrigeration, heat isotype.
Preferably, described indoor set 2 also comprises the first throttle valve 22 be connected with described First Heat Exchanger 23 and the second throttle 24 be connected with the other end of described second heat exchanger 23.Cold-producing medium can be made by certain reducing pressure by regulating flow effect can be formed during this section of pipeline by arranging first throttle valve and second throttle, for next step evaporation endothermic of cold-producing medium provides precondition, and for two-way or even multiplex system cryogen carry out converging the condition of converging providing lower pressure, ensure that the operation of air-conditioning system normal table.
Preferably, the other end of described second throttle 24 is connected with described first throttle valve 22 one end away from described First Heat Exchanger 21.Being arranged so that the cold-producing medium of the second throttle other end can normally carry out converging effect away from First Heat Exchanger one end with first throttle valve by such pipeline, providing precondition for carrying out defrosting, heat or freezing.When defrosting, cold-producing medium flows to first throttle valve one end (pressure is low) away from First Heat Exchanger from the second throttle other end (pressure is high); When heating, pressure at two ends is identical, converges; During refrigeration, pressure at two ends is identical, forms branch.
Preferably, the fan 25 be arranged on described First Heat Exchanger 21 and/or described second heat exchanger 23 is also comprised in described indoor set 2.Fan can play auxiliary heat dissipation and strengthen heat exchange effect by strengthening Diffusion of gas stream is set.
Preferably, described indoor set 2 is multiple, and each described indoor set 2 includes second heat exchanger 23 and a second throttle 24.Can carry out for the indoor that many places are different heating or freezing like this, and the indoor that when ensureing defrosting, many places are different all can realize not producing temperature fluctuation, avoid generation to occur cold wind, affect comfortableness.Number can be depending on the environment number of carrying out heat exchange needed for indoor.
Preferably, described off-premises station 1 also comprises outer machine choke valve 15, and one end of described outer machine choke valve 15 is connected with described outer machine heat exchanger 12 one end.The effect of reducing pressure by regulating flow can be carried out by the outer machine choke valve be connected with outer machine heat exchanger for outer machine refrigerant pipeline, ensure effectively to realize refrigeration, heat or the object defrosted.
Preferably, when indoor set 2 comprises first throttle valve 22 and second throttle 24, the other end of described outer machine choke valve 15 is connected on the pipeline between the described first throttle valve 22 of described indoor set 2 and described second throttle 24.Have effectively achieved the annexation of the refrigerant line between off-premises station and indoor set like this, circulate with ensure that cold-producing medium, ensure effectively to realize refrigeration, heat or the object defrosted.
Preferably, when off-premises station 1 comprises the first cross valve 13, four links of described first cross valve 13 are connected respectively to the First Heat Exchanger 21 of described indoor set 2, the port of export of described compressor 11, the entrance point of described compressor 11, the other end of described outer machine heat exchanger 12.The connection of compressor and the pipeline between outer machine heat exchanger and indoor set First Heat Exchanger is have effectively achieved by the first cross valve, for realizing refrigeration, heating or defrost and provide condition, and can be reached by the pipeline switching the first cross valve in refrigeration, heat and effective switching between defrosting.
Preferably, described off-premises station 1 also comprises the gas-liquid separator 16 being connected to described compressor 11 entrance point.By arranging the centrifugation that gas-liquid separator can realize between gas-liquid effectively, ensureing the aridity entering the cold-producing medium in compressor, ensureing 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, its control and regulation utilizing aforesaid air-conditioning system to carry out indoor refrigeration, heat or defrost.Can ensure that by adopting this air-conditioning system indoor set does not go out cold wind when defrosting, the situation generation avoid air-conditioning system to exist during defrost causing room temperature to fluctuate, even blowing a cold wind over, improves comfortableness effectively; Also make air-conditioning system indoor set when defrost still keep less heat supply, continue to heat; The second heat exchanger increased in addition not only can be used for defrost, can also be used for refrigeration, heat isotype.
Preferably, when system defrost, the port of export of compressor 11 is connected with described outer machine heat exchanger 12, the entrance point of compressor 11 is connected with described First Heat Exchanger 21 after control valve, regulates described control valve that the port of export of compressor 11 is connected with described second heat exchanger 23 after control valve.Effectively can reach the object of external machine heat exchanger defrost like this.
Preferably, when described off-premises station 1 also comprises the first cross valve 13, when described control valve is the second cross valve 14, when air-conditioning system defrost, regulate described first cross valve 13 that the port of export of compressor 11 is connected with described outer machine heat exchanger 12 after the first cross valve 13, the entrance point of compressor 11 is connected with described First Heat Exchanger 21 after the first cross valve 13, regulates described second cross valve 14 that the port of export of compressor 11 is connected with described second heat exchanger 23 after the second cross valve 14.
During defrost, refrigerant flows to as shown in Fig. 2 direction arrow.Compressor high temperature refrigerant divides two-way: a road flows to the first cross valve 13, through outer machine heat exchanger 12, is the defrosting of outer machine heat exchanger 12, flows to indoor set 2 again after refrigerant condensation; Another road flows to the second cross valve 14, and through the second heat exchanger 23, this road refrigerant, in the second heat exchanger 23 condensation heat release, is the cold air heating blown from First Heat Exchanger 21; Then two-way converges by first throttle valve 22, and refrigerant is become Low temperature low pressure liquid by after throttling, flows to First Heat Exchanger 21, draws the heat in room.Can ensure when not outer machine heat exchanger defrost or defrosting like this, due to the heat effect of the second heat exchanger, indoor are made to be unlikely to be in the state by evaporation endothermic completely, just can effectively prevent from indoor temperature from crossing to reduce significantly, effectively prevent house interior temperature fluctuation, the generation of the phenomenon even can blown a cold wind over, greatly improves comfortableness, then refrigerant flows to vapour liquid separator by cross valve 1 and returns compressor, circular flow like this.When have effectively achieved defrost, indoor temperature is unlikely to reduce, the generation of situation of avoid house interior temperature fluctuation, even blowing a cold wind over, thus improves comfortableness.
Preferably, when needs heat, regulate described control valve that described second heat exchanger 23 is connected with compressor 11 port of export by control valve, and the port of export of compressor 11 is connected with described First Heat Exchanger 21, the entrance point of compressor 11 is connected with described outer machine heat exchanger 12.Effectively can reach the object to indoor heating and effect like this.
Preferably, when described off-premises station 1 also comprises the first cross valve 13, when described control valve is the second cross valve 14, when needs heat, regulate described second cross valve 14 that described second heat exchanger 23 is connected with compressor 11 port of export by the second cross valve 14, formation heats, regulate described first cross valve 13 that the port of export of compressor 11 is connected with described First Heat Exchanger 21 after the first cross valve 13, described First Heat Exchanger 21 is heated, the entrance point of compressor 11 is connected with described outer machine heat exchanger 12 after the first cross valve 14, described outer machine heat exchanger 12 is made to carry out refrigeration heat absorption, now indoor set forms maximum heating capacity, off-premises station forms sweat cooling heat absorption, reach object indoor being heated to adjustment.
Now (indoor heating), compressor high temperature refrigerant divides two-way: a road flows to the first cross valve 13, through First Heat Exchanger 21, heats; Another road flows to the second cross valve 14, through the second heat exchanger 23; The all condensation heat releases in indoor set of two-way refrigerant, for room heat supply.Two-way refrigerant converges at the large valve place of interior machine, flows to the choke valve of outer machine, and after throttling, the machine heat exchanger evaporation outside of low-temp low-pressure liquid refrigerants, finally get back to vapour liquid separator 16, compressor from liquid/gas separator 16 air-breathing, so circulates, heats again.
Namely after having changed frost, the second cross valve 14 does not switch, and still keep allowing the second heat exchanger 23 heat, the first cross valve 13 switches, and allows First Heat Exchanger 21 heat.Compressor high temperature refrigerant divides two-way: a road flows to the first cross valve 13, through First Heat Exchanger 21, heats; Another road flows to the second cross valve 14, through the second heat exchanger 23; Two-way refrigerant all in indoor set condensation, for room heat supply.Two-way refrigerant converges at the large valve place of indoor set, flows to the choke valve of off-premises station, and after throttling, low-temp low-pressure liquid refrigerants outside machine heat exchanger 12 evaporates, and finally gets back to vapour and divides 16, and compressor 11 divides 16 air-breathings from vapour again, so circulates, and heats.
Preferably, when needs freeze, the port of export of compressor 11 is connected with described outer machine heat exchanger 12, the entrance point of compressor 11 is connected with described First Heat Exchanger 21, regulates described control valve that the entrance point of compressor 11 is connected with described second heat exchanger 23 after control valve.Effectively can reach the object to indoor refrigeration and effect like this.
Preferably, when described off-premises station 1 also comprises the first cross valve 13, when described control valve is the second cross valve 14, when needs freeze, regulate described first cross valve 13 that the port of export of compressor 11 is connected with described outer machine heat exchanger 12 after the first cross valve 13, the entrance point of compressor 11 is connected with described First Heat Exchanger 21 after the first cross valve 13, regulates described second cross valve 14 that the entrance point of compressor 11 is connected with described second heat exchanger 23 after the second cross valve 14.Thus reach the object freezed in indoor.
When indoor set running refrigerating pattern, the second heat exchanger 23 can switch to evaporimeter to freeze by the second cross valve 14 of off-premises station; When indoor set runs heating mode, the second heat exchanger 23 can switch to condenser to heat by the second cross valve 14 of off-premises station.When off-premises station needs defrost, interior machine heat exchanger 1 is evaporimeter, heat exchanger 2 is condenser, and heat exchanger 2 is the air heat of coming from heat exchanger 1, prevents cold wind from blowing out indoor set.
When the present invention mainly solves off-premises station defrosting, indoor set can not continue to heat and absorbs that room heat is even blown a cold wind over, the situation of comfortableness difference on the contrary.
The present invention is because the existence of the second cross valve 14, and the second heat exchanger 23 can become refrigeration and heat state by any switching laws.So not only for defrost situation, situations such as freezing, heat can also be used for.
Those skilled in the art will readily understand, under the prerequisite of not conflicting, above-mentioned each advantageous manner freely can combine, superpose.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (17)
1. an air-conditioning system, comprise off-premises station (1) and indoor set (2), described off-premises station (1) comprises compressor (11), outer machine heat exchanger (12), described indoor set (2) comprises the First Heat Exchanger (21) be connected with compressor (11), it is characterized in that: described indoor set (2) also comprises the second heat exchanger (23), described off-premises station (1) also comprises control valve, and two links of described control valve are connected to one end of described second heat exchanger (23) and the port of export of described compressor (11) respectively.
2. air-conditioning system according to claim 1, it is characterized in that: described off-premises station (1) also comprises the first cross valve (13), described First Heat Exchanger (21) is connected with described compressor (11) by described first cross valve (13); Described control valve is the second cross valve (14), and two other link of described second cross valve (14) links the entrance point of described compressor (11) again after being connected with each other.
3. according to the air-conditioning system one of claim 1-2 Suo Shu, it is characterized in that: described indoor set (2) also comprises the first throttle valve (22) be connected with described First Heat Exchanger (23) and the second throttle (24) be connected with the other end of described second heat exchanger (23).
4. air-conditioning system according to claim 3, is characterized in that: the other end of described second throttle (24) is connected with described first throttle valve (22) one end away from described First Heat Exchanger (21).
5. according to the air-conditioning system one of claim 1-4 Suo Shu, it is characterized in that: in described indoor set (2), also comprise the fan (25) be arranged on described First Heat Exchanger (21) and/or described second heat exchanger (23).
6. according to the air-conditioning system one of claim 1-5 Suo Shu, it is characterized in that: described indoor set (2) is for multiple, and each described indoor set (2) includes second heat exchanger (23) and a second throttle (24).
7. according to the air-conditioning system one of claim 1-6 Suo Shu, it is characterized in that: described off-premises station (1) also comprises outer machine choke valve (15), one end of described outer machine choke valve (15) is connected with described outer machine heat exchanger (12) one end.
8. air-conditioning system according to claim 7, it is characterized in that: when indoor set (2) comprises first throttle valve (22) and second throttle (24), the other end of described outer machine choke valve (15) is connected on the pipeline between the described first throttle valve (22) of described indoor set (2) and described second throttle (24).
9. according to the air-conditioning system one of claim 7-8 Suo Shu, it is characterized in that: when off-premises station (1) comprises the first cross valve (13), four links of described first cross valve (13) are connected respectively to the First Heat Exchanger (21) of described indoor set (2), the port of export of described compressor (11), the entrance point of described compressor (11), the other end of described outer machine heat exchanger (12).
10. according to the air-conditioning system one of claim 1-9 Suo Shu, it is characterized in that: described off-premises station (1) also comprises the gas-liquid separator (16) being connected to described compressor (11) entrance point.
The control method of 11. 1 kinds of air-conditioning systems, is characterized in that: utilize the described air-conditioning system of one of claim 1-10 to carry out the control and regulation of freezing, heat or defrosting.
12. according to the control method of air-conditioning system described in claim 11, it is characterized in that: when system defrost, the port of export of compressor (11) is connected with described outer machine heat exchanger (12), the entrance point of compressor (11) is connected with described First Heat Exchanger (21) after control valve, regulates described control valve that the port of export of compressor (11) is connected with described second heat exchanger (23) after control valve.
13. according to the control method of air-conditioning system described in claim 12, it is characterized in that: when described off-premises station also comprises the first cross valve, when described control valve is the second cross valve, when system defrost, regulate described first cross valve (13) that the port of export of compressor (11) is connected with described outer machine heat exchanger (12) after the first cross valve (13), the entrance point of compressor (11) is connected with described First Heat Exchanger (21) after the first cross valve (13), regulate described second cross valve (14) that the port of export of compressor (11) is connected with described second heat exchanger (23) after the second cross valve (14).
14. according to the control method of air-conditioning system described in claim 11, it is characterized in that: when needs heat, regulate described control valve that described second heat exchanger (23) is connected with compressor (11) port of export by control valve, and the port of export of compressor (11) is connected with described First Heat Exchanger (21), the entrance point of compressor (11) is connected with described outer machine heat exchanger (12).
15. according to the control method of air-conditioning system described in claim 14, it is characterized in that: when described off-premises station also comprises the first cross valve, when described control valve is the second cross valve, when needs heat, regulate described second cross valve (14) that described second heat exchanger (23) is connected with compressor (11) port of export by the second cross valve (14), regulate described first cross valve (13) that the port of export of compressor (11) is connected with described First Heat Exchanger (21) after the first cross valve (13), the entrance point of compressor (11) is connected with described outer machine heat exchanger (12) after the first cross valve (13).
16. according to the control method of air-conditioning system described in claim 11, it is characterized in that: when needs freeze, the port of export of compressor (11) is connected with described outer machine heat exchanger (12), the entrance point of compressor (11) is connected with described First Heat Exchanger (21), regulates described control valve that the entrance point of compressor (11) is connected with described second heat exchanger (23) after control valve.
17. according to the control method of air-conditioning system described in claim 16, it is characterized in that: when described off-premises station also comprises the first cross valve, when described control valve is the second cross valve, when needs freeze, regulate described first cross valve (13) that the port of export of compressor (11) is connected with described outer machine heat exchanger (12) after the first cross valve (13), the entrance point of compressor (11) is connected with described First Heat Exchanger (21) after the first cross valve (13), regulate described second cross valve (14) that the entrance point of compressor (11) is connected with described second heat exchanger (23) after the second cross valve (14).
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| 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 |
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| CN114061055A (en) * | 2020-07-28 | 2022-02-18 | 广东美的制冷设备有限公司 | Air conditioner, control method, air conditioner control device and readable storage medium |
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