CN106016808A - Air-conditioning system and control method thereof - Google Patents
Air-conditioning system and control method thereof Download PDFInfo
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- CN106016808A CN106016808A CN201610348603.XA CN201610348603A CN106016808A CN 106016808 A CN106016808 A CN 106016808A CN 201610348603 A CN201610348603 A CN 201610348603A CN 106016808 A CN106016808 A CN 106016808A
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- valve
- conditioning system
- air conditioning
- valve port
- collecting device
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Classifications
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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
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Abstract
The invention provides an air-conditioning system. According to the air-conditioning system, a compressor, a four-way valve, an outdoor heat exchanger, a subcooler, a throttling component and an indoor heat exchanger are arranged in sequence to form a refrigerating loop; the outdoor heat exchanger comprises a first current collecting device, a second current collecting device and a plurality of current passing pipes which are connected between the first current collecting device and the second current collecting device; the subcooler comprises a first current passing channel and a second current passing channel, the first end of the first current passing channel communicates with the second current collecting device, and the second end of the first current passing channel communicates with the throttling component; the first end of the second current passing channel communicates with the low-pressure air suction end of the compressor, and the second end of the second current passing channel is connected with a first electromagnetic valve in series and communicates to the second end of the first current passing channel; and a switching device and at least one current passing pipe are connected in series and arranged between the first current collecting device and the second current collecting device, and the switching device further communicates with the first electromagnetic valve. The invention further relates to a control method. By the adoption of the control method, a low-temperature heating deicing function of the air-conditioning system is achieved, and normal drainage of drainage holes in the bottoms of the heat exchangers is guaranteed.
Description
Technical field
The present invention relates to refrigerating field, particularly relate to a kind of air conditioning system and control method thereof.
Background technology
Generally, the outer machine product of domestic multi-connected machine often uses common frequency conversion high pressure chest screw compressor,
I.e. use non-increasing enthalpy Scroll Inverter Compressor, compared with spray enthalpy frequency-changing cyclone compressor, have " with frequency, energy
Power ability low, same, efficiency is low, high frequency delivery temperature high and low temperature operating mode heating capacity low " shortcoming.With
Time, cold zone, heat the winter such as northeast, the Northwest, it is main for still using combusts fossil raw material,
This not only causes substantial amounts of environmental pollution, also result in energy waste simultaneously.
Existing low-temperature enthalpy-increasing (EVI) multi-connected machine still has a problem to have to be solved under worst cold case.This
Problem is exactly at cold zone, such as northeast, northwest and the area in North of Yangtze River North China, it may appear that temperature is rapid
The possibility of fall, if daytime is close to 0 DEG C, has rain and snow mixed, but nighttime temperature rapid drawdown, and sleet Cheng Bing blocks draining
Hole, though outer machine has a defrost process, but because osculum blocks cannot proper drainage, cause liquid condensation
Water becomes again ice, because of frequent defrost on forming chamber external heat exchanger frost layer and constantly grow, finally affect room
The heat exchange of external heat exchanger, the heat-exchange performance of this phenomenon meeting extreme influence unit and reliability.
Summary of the invention
Based on this, it is an object of the invention to provide a kind of air conditioning system and control method thereof, it is achieved that air-conditioning
The low-temperature heating deicing function of system, under the conditions of low-temperature heating, it is ensured that the ice sheet bottom outdoor heat exchanger is complete
Entirely melt, make the osculum proper drainage of exchanger base；Ensure air conditioning system low temperature at low temperatures
Heating capacity is unattenuated, it is achieved the reliability operation of unit.For achieving the above object, technical scheme
As follows:
A kind of air conditioning system, including compressor, cross valve, outdoor heat exchanger, subcooler, throttle part,
Indoor heat exchanger and switching device；Compressor, cross valve, outdoor heat exchanger, subcooler, throttle part and
Indoor heat exchanger sets gradually formation refrigerating circuit；Described outdoor heat exchanger include the first current-collecting device, second
Current-collecting device and multiple mistake theing be connected between described first current-collecting device and described second current-collecting device are flowed
Pipe；
Described subcooler includes the first flow channels and the second flow channels, the first of described first flow channels
End is communicated to described second current-collecting device, and the second end of described first flow channels is communicated to described throttle part；
First end of described second flow channels is communicated to the low pressure air suction end of described compressor, and described second crosses circulation
Second end in road the first electromagnetic valve of connecting is communicated to the second end of described first flow channels；Described switching device
And at least one flow tube is arranged in series between described first current-collecting device and described second current-collecting device, institute
Stating switching device and be also communicated to described first electromagnetic valve, described switching device is used at least one flow tube described
Fluid switching, middle for the part flowed out from described throttle part temperature fluid can be incorporated into by described switching device
In at least one flow tube described.
Wherein in an embodiment, described switching device includes the first three-way valve and the second three-way valve, described
First three-way valve has the first valve port A1, the second valve port B1 and the 3rd valve port C1, and described first valve port A1 is even
Being connected to the first end of at least one flow tube described, described second valve port B1 is connected to described first current-collecting device,
Described 3rd valve port C1 is connected to the first end of described first electromagnetic valve；Described second three-way valve has the 4th valve
Mouth A2, the 5th valve port B2 and the 6th valve port C2；Described 4th valve port A2 be connected to described at least one cross stream
Second end of pipe, described 5th valve port B2 is connected to described second current-collecting device, and described 6th valve port C2 is even
Being connected to the second end of described first electromagnetic valve, the second end of described first electromagnetic valve is connected to described second and crosses stream
Second end of passage.
Wherein in an embodiment, described air conditioning system also includes the second electromagnetic valve, described second electromagnetic valve
It is arranged in series between the first end and the low pressure air suction end of described compressor of described second flow channels.
Wherein in an embodiment, described air conditioning system also includes the first expansion valve, described first expansion valve
It is arranged in series between the second end of described second flow channels and described first electromagnetic valve.
Wherein in an embodiment, described air conditioning system also includes the first check valve, described first check valve
It is arranged in series between the first end and the intermediate pressure suction end of described compressor of described second flow channels,
The intermediate pressure that described first check valve allows cold-producing medium to flow to described compressor from described second flow channels is inhaled
Gas end.
Wherein in an embodiment, described outdoor heat exchanger is connected on the pipeline between described subcooler set
It is equipped with on the second expansion valve, and described second expansion valve and has been arranged in parallel permission cold-producing medium from described outdoor heat exchange
Device flows to the second check valve of described subcooler.
Wherein in an embodiment, described air conditioning system also includes gas-liquid separator, described gas-liquid separator
It is arranged in series between the low pressure air suction end of described compressor and described cross valve.
Wherein in an embodiment, at least one flow tube described is the lower side of described outdoor heat exchanger
Flow tube.
Further relate to the control method of a kind of air conditioning system, when described air conditioning system is in refrigeration mode or heating
During frost pattern: described first valve port A1 and described second valve port B1 conducting, described 4th valve port A2 is with described
5th valve port B2 conducting, described first electromagnetic valve and described second electromagnetic valve are all opened.
Wherein in an embodiment, under described air conditioning system is in heating mode, as Tr ＜ T1, institute
State the first expansion valve to open, described first valve port A1 and described 3rd valve port C1 conducting, described 4th valve port
A2 is turned off with described 6th valve port C2 conducting, described first electromagnetic valve and described second electromagnetic valve, described sky
Adjusting system is entered by heating mode and heats deice mode；Wherein, Tr is outdoor environment temperature, and T1 is first pre-
If temperature.
Wherein in an embodiment, described air conditioning system described heat work under deice mode first preset
When time is or/and Tr reaches the second preset temperature T2, described air conditioning system exit described in heat deice mode.
Wherein in an embodiment, described air conditioning system is spaced second after heating deice mode described in exiting
Preset Time heats deice mode described in being again introduced into.
Wherein in an embodiment, as Tr >=T2, described first electromagnetic valve is opened, described second electromagnetism
Valve cuts out, described first valve port A1 and described second valve port B1 conducting, described 4th valve port A2 and described the
Five valve port B2 conductings, described air conditioning system exit described in heat deice mode and enter and heat non-deice mode,
Wherein, T2 is the second preset temperature, T2 ＞ T1.
Wherein in an embodiment, under described air conditioning system is in heating mode, as T1≤Tr ＜ T2,
Judge described air conditioning system whether for first entering into heating mode, the most described air conditioning system is by described system
Heat pattern proceeds to heat deice mode, described heat run the first Preset Time under deice mode after enter
Heating non-deice mode, the most described air conditioning system heats non-deice mode described in described heating mode proceeds to；
Heating under deice mode described, the first expansion valve is opened, described first valve port A1 and described 3rd valve
Mouthful C1 conducting, described 4th valve port A2 and described 6th valve port C2 conducting, described first electromagnetic valve and described
Second electromagnetic valve is turned off；
Heating under non-deice mode described, described first electromagnetic valve is opened, described second closed electromagnetic valve,
Described first valve port A1 and described second valve port B1 conducting, described 4th valve port A2 and described 5th valve port B2
Conducting；
Wherein, Tr is outdoor environment temperature, and T1 is the first preset temperature, and T2 is the second preset temperature.
Wherein in an embodiment, described first preset temperature T1 is-15 DEG C, described second preset temperature
T2 is-10 DEG C, and described first Preset Time is 30 minutes.
The invention has the beneficial effects as follows:
The air conditioning system of the present invention and control method thereof, realize at least one cross stream by arranging switching device
The fluid reversing of pipe, it is achieved that the low-temperature heating deicing function of air conditioning system, under the conditions of low-temperature heating, protects
Ice sheet bottom card outdoor heat exchanger melts completely, makes the osculum proper drainage of exchanger base；Ensure sky
Adjusting system low-temperature heating capacity at low temperatures is unattenuated, normally heating, under refrigeration mode, all without
Outdoor heat exchanger branch is taken, it is achieved the reliability operation of unit.
Accompanying drawing explanation
Fig. 1 is that the air conditioning system of one embodiment of the invention at refrigeration mode or heats the cold-producing medium under defrost pattern
Flow to schematic diagram；
Fig. 2 is the refrigerant flow direction schematic diagram under heating deice mode of the air conditioning system shown in Fig. 1；
Fig. 3 is the refrigerant flow direction schematic diagram under heating non-deice mode of the air conditioning system shown in Fig. 2；
Wherein,
101 cross valves；103 outdoor heat exchangers；104 subcoolers；105 throttle part 106 indoor heat exchangers；
107 first electromagnetic valves；108 first three-way valve；109 second three-way valve；110 second electromagnetic valves；
111 first expansion valves；112 first check valves；113 second expansion valves；114 second check valves；
115 gas-liquid separators；116 first stop valves；117 second stop valves.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and reality
Execute example air conditioning system and the control method thereof of the present invention are further elaborated.It should be noted that
In the case of not conflicting, the feature in following embodiment and embodiment can be mutually combined.Should be appreciated that
Specific embodiment described herein is only used for explaining the present invention, is not intended to limit the present invention.
Embodiment one
Referring to figs. 1 through Fig. 3, the air conditioning system of one embodiment of the invention include compressor 101, cross valve 102,
Outdoor heat exchanger 103, subcooler 104, throttle part 105, indoor heat exchanger 106 and switching device.Pressure
Contracting machine 101, cross valve 102, outdoor heat exchanger 103, subcooler 104, throttle part 105 and indoor are changed
Hot device 106 sets gradually formation refrigerating circuit.Compressor 101 is enthalpy-increasing compressor, and enthalpy-increasing compressor refers to
There is the class compressor increasing gas benefit enthalpy function, it is characterized in that to pass through gaseous coolant spraying technique, to gas
State coolant forms second-compressed, ultimately forms the class compressor that capacity is big, ability is high.
Outdoor heat exchanger 103 includes the first current-collecting device, the second current-collecting device and is connected to the first afflux dress
Put the multiple flow tubes between the second current-collecting device.I.e. one end of flow tube connects the first overflow means, mistake
The other end of flow tube connects the second current-collecting device.It Fig. 1 is the first collection on the left of the main body of outdoor heat exchanger 103
Stream device, is the second current-collecting device on the right side of the main body of outdoor heat exchanger 103.Current-collecting device can be header or
Diverter.Throttle part 105 can be expansion valve, preferably electric expansion valve.
Subcooler 104 includes the first flow channels and the second flow channels.First end (the figure of the first flow channels
Upper end in 1) it is communicated to the second current-collecting device, second end (lower end in Fig. 1) of the first flow channels is communicated to
Throttle part 105.First end (upper end in Fig. 1) of the second flow channels is communicated to the low pressure of compressor 101
Suction end, second end (lower end in Fig. 1) of the second flow channels the first electromagnetic valve 107 of connecting is communicated to
Second end of one flow channels.
Switching device and at least one flow tube be arranged in series in the first current-collecting device and the second current-collecting device it
Between, switching device is also communicated to the first electromagnetic valve 107, and switching device is for the stream of at least one flow tube described
Body switch, switching device middle for the part flowed out from throttle part 105 temperature fluid can be incorporated into described at least
In one flow tube.Preferably, at least one flow tube described is the mistake of lower side of outdoor heat exchanger 103
Flow tube.In Fig. 1, a flow tube of the lower side of switching device and outdoor heat exchanger 103 is arranged in series in the
Between one current-collecting device and the second current-collecting device, switching device is for the one of the lower side of outdoor heat exchanger 103
The fluid switching of individual flow tube.
As the preferable mode of one, as it is shown in figure 1, switching device includes the first three-way valve 108 and second
Three-way valve 109.Three-way valve, also known as three-way diverter valve, refers to be controlled by progressive motor, opens two passages
Closing and control, during a-road-through, another road is closed, and i.e. can change the valve class that fluid flows to.
First three-way valve 108 has the first valve port A1, the second valve port B1 and the 3rd valve port C1.First valve port
A1 is connected to the first end of at least one flow tube described, and the second valve port B1 is connected to the first current-collecting device, the
Three valve port C1 are connected to the first end of the first electromagnetic valve 107.In Fig. 1, the first valve port A1 is connected to outdoor
The left end of one flow tube of the lower side of heat exchanger 103.
Second three-way valve 109 has the 4th valve port A2, the 5th valve port B2 and the 6th valve port C2.4th valve port
A2 is connected to the second end of at least one flow tube described, and the 5th valve port B2 is connected to the second current-collecting device, the
Six valve port C2 are connected to the second end of the first electromagnetic valve 107, and the second end of the first electromagnetic valve 107 is connected to
Second end of two flow channels.In Fig. 1, the 4th valve port A2 is connected to the one of the lower side of outdoor heat exchanger 103
The right-hand member of individual flow tube.
In the present embodiment, the second electromagnetic valve 110 is arranged in series in the first end and the compressor of the second flow channels
Between the low pressure air suction end of 101.First expansion valve 111 is arranged in series in second end and of the second flow channels
Between one electromagnetic valve 107.First check valve 112 is arranged in series in the first end and the compression of the second flow channels
Between the intermediate pressure suction end of machine 101, the first check valve 112 allows cold-producing medium from the second flow channels stream
To the intermediate pressure suction end of compressor 101.
In other embodiments, outdoor heat exchanger 103 is connected on the pipeline between subcooler 104 to set
It is equipped with on the second expansion valve 113, and the second expansion valve 113 and has been arranged in parallel permission cold-producing medium from outdoor heat exchanger
103 the second check valves 114 flowing to subcooler 104.Low pressure air suction end and cross valve 102 at compressor 101
Between also can be arranged in series gas-liquid separator 115.First expansion valve 111 and the second expansion valve 113 can be electricity
Sub-expansion valve.
The air conditioning system of above example, realizes the fluid of at least one flow tube by arranging switching device
Commutation, it is achieved that the low-temperature heating deicing function of air conditioning system, under the conditions of low-temperature heating, it is ensured that outdoor is changed
Ice sheet bottom hot device melts completely, makes the osculum proper drainage bottom outdoor heat exchanger；Ensure air-conditioning
System low-temperature heating capacity at low temperatures is unattenuated, it is achieved the reliability operation of unit.
Embodiment two
The control mode of the air conditioning system in above example is as follows:
(1) refrigeration mode or or heat defrost pattern
As it is shown in figure 1, when air conditioning system is in refrigeration mode or heats defrost pattern, the first valve port A1 with
Second valve port B1 conducting, the 4th valve port A2 and the 5th valve port B2 conducting, the first electromagnetic valve 107 and the second electricity
Magnet valve 110 is all opened, and remaining vigour part, according to normal logic control.Wherein, air conditioning system is at refrigeration mould
Formula is identical with the refrigerant flow direction heated under defrost pattern, and cold-producing medium specifically flows to such as direction of arrow institute in Fig. 1
Showing, the aerofluxus of compressor 101 flows into outdoor heat exchanger 103, from outdoor heat exchanger 103 by cross valve 102
The coolant flowed out enters the second expansion valve 113, and the cold-producing medium flowing out the second expansion valve 113 enters subcooler 104
The first flow channels, from subcooler 104 first flow channels flow out cold-producing medium be divided into two-way, wherein
One tunnel sequentially pass through throttle part 105, indoor heat exchanger 106, cross valve 102, gas-liquid separator 115 and
Return to the low pressure air suction end of compressor 101；Another road sequentially passes through first electromagnetic valve the 107, first expansion valve
111, the second flow channels of subcooler 104, the second electromagnetic valve 110 and gas-liquid separator 115 and return to pressure
The low pressure air suction end of contracting machine 101.
Air conditioning system is at refrigeration mode or heats under defrost pattern, and outdoor heat exchanger 103 is entirely used for condensation and dissipates
Heat, the i.e. branch of outdoor heat exchanger 103 are the most occupied, and now, a part of middle temperature high-pressure refrigerant is by the
Two electromagnetic valves 107 flow into the first expansion valve 111, through the reducing pressure by regulating flow effect of the first expansion valve 111, become
Low-temp low-pressure gaseous refrigerant, the first flow channels (main road) for subcooler 104 is lowered the temperature simultaneously,
Improving degree of supercooling, in such a mode, " heating deice mode " does not comes into force.
(2) deice mode is heated
With reference to Fig. 2, under air conditioning system is in heating mode, as Tr ＜ T1, the first expansion valve 111 is opened
Open, the first valve port A1 and the 3rd valve port C1 conducting, the 4th valve port A2 and the 6th valve port C2 conducting, first
Electromagnetic valve 107 and the second electromagnetic valve 110 are turned off, and air conditioning system is entered by heating mode and heats deice mode.
I.e. under heating deice mode, the first expansion valve 111 is opened, the first valve port A1 and the 3rd valve port C1 conducting,
4th valve port A2 and the 6th valve port C2 conducting, the first electromagnetic valve 107 and the second electromagnetic valve 110 are turned off.
Wherein, Tr is outdoor environment temperature, and T1 is the first preset temperature.T1 is preferably-15 DEG C.
Such as, when outdoor environment temperature Tr is less than-15 DEG C, air conditioning system is entered to heat by heating mode and removes
Ice pattern, under heating deice mode, cold-producing medium specifically flows to as shown in the direction of arrow in Fig. 2, compressor
The aerofluxus of 101 flows into indoor heat exchanger 106 by cross valve 102, the coolant flowed out from indoor heat exchanger 106
Entering throttle part 105, the cold-producing medium flowing out throttle part 105 is divided into two-way, and wherein a road sequentially passed through
First flow channels of cooler 104, the second expansion valve 113, outdoor heat exchanger 103, cross valve 102 are gentle
Liquid/gas separator 115 and return to the low pressure air suction end of compressor 101, complete a major cycle；Another Lu Xianliu
Enter the 3rd valve port C1 of the first three-way valve 108, then flow out from the first valve port A1 of the first three-way valve 108 and enter
Enter the flow tube of the lower side of outdoor heat exchanger 103, from the flow tube stream of the lower side of outdoor heat exchanger 103
The cold-producing medium gone out flow to the 4th valve port A2 of the second three-way valve 109, then the 6th valve from the second three-way valve 109
Mouth C2 flow to the first expansion valve 111, and the cold-producing medium flowed out from the first expansion valve 111 enters subcooler 104
Second flow channels, the cold-producing medium that the second flow channels flows out enters compressor 101 through the first check valve 112
Intermediate pressure suction end and enter in compressor 101.Under this pattern, " heat deice mode " mechanism in force.
Preferably, air conditioning system works the first Preset Time or/and Tr reaches second under heating deice mode
During preset temperature T2, air conditioning system exits and heats deice mode.First Preset Time can be 30 minutes, second
Preset temperature T2 can be-10 DEG C.
In other embodiments, air conditioning system exit heat deice mode after can be spaced the second Preset Time
It is again introduced into heating deice mode.Second Preset Time can be 20-50 minute, such as, can be 30 minutes, when
Right second Preset Time can be configured as other real number.
(3) non-deice mode is heated
As the preferable mode of one, as it is shown on figure 3, as Tr >=T2, the first electromagnetic valve 107 is opened,
Second electromagnetic valve 110 cuts out, the first valve port A1 and the second valve port B1 conducting, the 4th valve port A2 and the 5th valve
Mouth B2 conducting, air conditioning system exits and heats deice mode and enter and heat non-deice mode.That is it is non-heating
Under deice mode, the first electromagnetic valve 107 is opened, and the second electromagnetic valve 110 cuts out, the first valve port A1 and second
Valve port B1 turns on, and the 4th valve port A2 and the 5th valve port B2 conducting, remaining vigour part, according to normal logic control
System.Wherein, T2 is the second preset temperature, T2 ＞ T1.Such as second preset temperature T2 can be-10 DEG C.
Such as, when outdoor environment temperature Tr more than or equal to-10 DEG C or heat deice mode run 30 minutes time,
First electromagnetic valve 107 is opened, and the second electromagnetic valve 110 cuts out, the first valve port A1 and the second valve port B1 conducting,
4th valve port A2 and the 5th valve port B2 conducting, air conditioning system exits and heats deice mode and enter and heat non-removing
Ice pattern.Under heating non-deice mode, cold-producing medium specifically flows to as shown in the direction of arrow in Fig. 3, compression
The aerofluxus of machine 101 flows into indoor heat exchanger 106 by cross valve 102, flows out from indoor heat exchanger 106
Coolant enters throttle part 105, and the cold-producing medium flowing out throttle part 105 is divided into two-way, wherein road warp successively
Cross the first flow channels of subcooler 104, the second expansion valve 113, outdoor heat exchanger 103, cross valve 102
Return to the low pressure air suction end of compressor 101 with gas-liquid separator 115, complete a major cycle；Another road
Sequentially pass through first electromagnetic valve the 107, first expansion valve 111, second flow channels and first of subcooler 104
Check valve 112 and enter the intermediate pressure suction end of compressor 101, finally enter in compressor 101.Should
Under the mode of kind, outdoor heat exchanger 103 reverts to the heat exchanger being completely used for heating, through the first expansion valve 111
Cold-producing medium be directly entered the second flow channels of subcooler 104, by reducing pressure by regulating flow effect, become low temperature
Low-pressure gaseous refrigerant, then flow in compressor through intermediate pressure suction end；Under this pattern, " heat deicing
Pattern " failure mechanisms.
As the preferable mode of another kind, under air conditioning system is in heating mode, as T1≤Tr ＜ T2,
Judge air conditioning system whether for first entering into heating mode, the most then air conditioning system by heating mode proceed to system
Hot deice mode, enters after running the first Preset Time and heat non-deice mode under heating deice mode,
Otherwise air conditioning system is proceeded to heat non-deice mode by heating mode.Such as, during 15 DEG C≤Tr ＜-10 DEG C, first
Secondary entrance is controlled according to " heating deice mode ", then controls according to " heating non-deice mode "
System.
The air conditioning system of various embodiments above and control method thereof, realize at least one by arranging switching device
The fluid reversing of individual flow tube, it is achieved that the low-temperature heating deicing function of air conditioning system, in low-temperature heating condition
Under, it is ensured that the ice sheet bottom outdoor heat exchanger melts completely, makes the osculum proper drainage of exchanger base；
Ensure that air conditioning system low-temperature heating capacity at low temperatures is unattenuated, normally heating, under refrigeration mode,
Take all without to outdoor heat exchanger branch, it is achieved the reliability operation of unit.It is pollution-free, energy-conservation subtracts
Row.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed,
But therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for this area
Those of ordinary skill for, without departing from the inventive concept of the premise, it is also possible to make some deformation and
Improving, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended
Claim is as the criterion.
Claims (15)
1. an air conditioning system, it is characterised in that include compressor (101), cross valve (102), outdoor
Heat exchanger (103), subcooler (104), throttle part (105), indoor heat exchanger (106) and switching dress
Put；Compressor (101), cross valve (102), outdoor heat exchanger (103), subcooler (104), throttling
Parts (105) and indoor heat exchanger (106) set gradually formation refrigerating circuit；Described outdoor heat exchanger (103)
Including the first current-collecting device, the second current-collecting device and be connected to described first current-collecting device with described second collection
Multiple flow tubes between stream device；
Described subcooler (104) includes the first flow channels and the second flow channels, described first flow channels
The first end be communicated to described second current-collecting device, the second end of described first flow channels is communicated to described joint
Stream unit (105)；First end of described second flow channels is communicated to the low pressure of described compressor (101) and inhales
Gas end, the second end of described second flow channels connect the first electromagnetic valve (107) be communicated to described first cross stream
Second end of passage；Described switching device and at least one flow tube are arranged in series in described first current-collecting device
And between described second current-collecting device, described switching device is also communicated to described first electromagnetic valve (107), institute
Stating switching device and switch for the fluid of at least one flow tube described, described switching device can be by from described
The part middle temperature fluid that throttle part (105) flows out is incorporated at least one flow tube described.
Air conditioning system the most according to claim 1, it is characterised in that described switching device includes first
Three-way valve (108) and the second three-way valve (109), described first three-way valve (108) have the first valve port A1,
Second valve port B1 and the 3rd valve port C1, described first valve port A1 are connected to the of at least one flow tube described
One end, described second valve port B1 is connected to described first current-collecting device, and described 3rd valve port C1 is connected to institute
State the first end of the first electromagnetic valve (107)；Described second three-way valve (109) have the 4th valve port A2,
Five valve port B2 and the 6th valve port C2；Described 4th valve port A2 is connected to the second of at least one flow tube described
End, described 5th valve port B2 is connected to described second current-collecting device, and described 6th valve port C2 is connected to described
Second end of the first electromagnetic valve (107), the second end of described first electromagnetic valve (107) is connected to described
Second end of two flow channels.
Air conditioning system the most according to claim 2, it is characterised in that also include the second electromagnetic valve (110),
Described second electromagnetic valve (110) is arranged in series in the first end of described second flow channels and described compressor
(101) between low pressure air suction end.
Air conditioning system the most according to claim 3, it is characterised in that also include the first expansion valve (111),
Described first expansion valve (111) is arranged in series in the second end of described second flow channels and described first electromagnetism
Between valve (107).
Air conditioning system the most according to claim 4, it is characterised in that also include the first check valve (112),
Described first check valve (112) is arranged in series in the first end of described second flow channels and described compressor
(101), between intermediate pressure suction end, described first check valve (112) allows cold-producing medium from described the
Two flow channels flow to the intermediate pressure suction end of described compressor (101).
6. according to the air conditioning system described in any one of claim 1-5, it is characterised in that described outdoor heat exchange
Device (103) is connected on the pipeline between described subcooler (104) be provided with the second expansion valve (113),
And it has been arranged in parallel permission cold-producing medium on described second expansion valve (113) from described outdoor heat exchanger (103)
Flow to second check valve (114) of described subcooler (104).
7. according to the air conditioning system described in any one of claim 1-5, it is characterised in that also include that gas-liquid is divided
From device (115), described gas-liquid separator (115) is arranged in series in the low pressure of described compressor (101) and inhales
Between gas end and described cross valve (102).
8. according to the air conditioning system described in any one of claim 1-5, it is characterised in that described at least one
Flow tube is the flow tube of the lower side of described outdoor heat exchanger (103).
9. a control method for air conditioning system, described air conditioning system is the air conditioning system described in claim 5,
It is characterized in that, when described air conditioning system is in refrigeration mode or heats defrost pattern:
Described first valve port A1 and described second valve port B1 conducting, described 4th valve port A2 and described 5th valve
Mouth B2 conducting, described first electromagnetic valve (107) and described second electromagnetic valve (110) are all opened.
The control method of air conditioning system the most according to claim 9, it is characterised in that at described sky
Adjusting system is under heating mode, and as Tr ＜ T1, described first expansion valve (111) is opened, and described the
One valve port A1 and described 3rd valve port C1 conducting, described 4th valve port A2 and described 6th valve port C2 conducting,
Described first electromagnetic valve (107) and described second electromagnetic valve (110) are turned off, and described air conditioning system is by making
Heat pattern enters and heats deice mode；Wherein, Tr is outdoor environment temperature, and T1 is the first preset temperature.
The control method of 11. air conditioning systems according to claim 10, it is characterised in that described air-conditioning
System described heat first Preset Time that works under deice mode or/and Tr reaches the second preset temperature T2 time,
Described air conditioning system heats deice mode described in exiting.
The control method of 12. air conditioning systems according to claim 11, it is characterised in that described air-conditioning
System be spaced after heating deice mode described in exiting the second Preset Time be again introduced into described in heat deicing mould
Formula.
The control method of 13. air conditioning systems according to claim 10, it is characterised in that as Tr >=T2
Time, the unlatching of described first electromagnetic valve (107), the closedown of described second electromagnetic valve (110), described first valve
Mouth A1 and described second valve port B1 conducting, described 4th valve port A2 and described 5th valve port B2 conducting, institute
State air conditioning system exit described in heat deice mode and enter and heat non-deice mode, wherein, T2 is second pre-
If temperature, T2 ＞ T1.
14. according to the control method of the air conditioning system described in any one of claim 9-13, it is characterised in that
Under described air conditioning system is in heating mode, as T1≤Tr ＜ T2, it is judged that whether described air conditioning system is
First entering into heating mode, the most described air conditioning system is proceeded to heat deice mode by described heating mode,
Described heat run the first Preset Time under deice mode after enter and heat non-deice mode, otherwise described
Air conditioning system heats non-deice mode described in described heating mode proceeds to；
Heating under deice mode described, the first expansion valve (111) is opened, described first valve port A1 and institute
State the 3rd valve port C1 conducting, described 4th valve port A2 and described 6th valve port C2 conducting, described first electromagnetism
Valve (107) and described second electromagnetic valve (110) are turned off；
Heating under non-deice mode described, described first electromagnetic valve (107) is opened, described second electromagnetic valve
(110) close, described first valve port A1 with described second valve port B1 conducting, described 4th valve port A2 with
Described 5th valve port B2 conducting；
Wherein, Tr is outdoor environment temperature, and T1 is the first preset temperature, and T2 is the second preset temperature.
The control method of 15. air conditioning systems according to claim 14, it is characterised in that described first
Preset temperature T1 is-15 DEG C, and described second preset temperature T2 is-10 DEG C, and described first Preset Time is 30
Minute.
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| CN201610348603.XA CN106016808B (en) | 2016-05-23 | 2016-05-23 | Air-conditioning system and its control method |
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| CN107023948A (en) * | 2017-04-01 | 2017-08-08 | 青岛海尔空调器有限总公司 | Air conditioner and its do not shut down Defrost operation method |
| CN107023946A (en) * | 2017-04-01 | 2017-08-08 | 青岛海尔空调器有限总公司 | Air conditioner without shutting Defrost operation method |
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|---|---|
| CN106016808B (en) | 2018-08-10 |
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Inventor after: Liu Hua Inventor after: Feng Tao Inventor after: Xiong Jianguo Inventor after: Zhang Shiqiang Inventor after: Wu Lianfa Inventor after: Li Limin Inventor after: Jiao Huachao Inventor before: Feng Tao Inventor before: Xiong Jianguo Inventor before: Li Limin Inventor before: Jiao Huachao |
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