CN106016808B - Air-conditioning system and its control method - Google Patents
Air-conditioning system and its control method Download PDFInfo
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- CN106016808B CN106016808B CN201610348603.XA CN201610348603A CN106016808B CN 106016808 B CN106016808 B CN 106016808B CN 201610348603 A CN201610348603 A CN 201610348603A CN 106016808 B CN106016808 B CN 106016808B
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- heating
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Abstract
The present invention provides a kind of air-conditioning system, and compressor, four-way valve, outdoor heat exchanger, subcooler, throttle part and indoor heat exchanger set gradually to form refrigerating circuit；Outdoor heat exchanger includes the first current-collecting device, the second current-collecting device and the multiple flow tubes being connected between the first current-collecting device and the second current-collecting device；Subcooler includes the first flow channels and the second flow channels, and the first end of the first flow channels is connected to the second current-collecting device, and the second end of the first flow channels is connected to throttle part；The first end of second flow channels is connected to the low pressure air suction end of compressor, and second end the first solenoid valve of series connection of the second flow channels is connected to the second end of the first flow channels；Switching device and at least one flow tube are arranged in series between the first current-collecting device and the second current-collecting device, and switching device is also connected to the first solenoid valve.Further relate to a kind of control method.It realizes the low-temperature heating deicing function of air-conditioning system, ensures the osculum proper drainage of exchanger base.
Description
Technical field
The present invention relates to refrigerating field more particularly to a kind of air-conditioning systems and its control method.
Background technology
Under normal circumstances, the outer machine product of domestic multi-connected machine often uses common frequency conversion high pressure chest screw compressor, that is, uses
Non- increasing enthalpy Scroll Inverter Compressor, compared with spraying enthalpy frequency-changing cyclone compressor, have " with frequency, ability is low, same to ability, efficiency is low,
High frequency delivery temperature high and low temperature operating mode heating capacity is low " the shortcomings that.Meanwhile cold zone, such as the winter in northeast, the Northwest
Heating still uses based on combusts fossil raw material, this not only causes a large amount of environmental pollution, while also resulting in energy waste.
Existing low-temperature enthalpy-increasing (EVI) multi-connected machine under worst cold case still there are one problem have it is to be solved.This problem is just
It is in cold zone, such as the area in northeast, northwest and North of Yangtze River North China, it may appear that the possibility that there's a sudden fall in temperature, as daytime connects
Nearly 0 DEG C, there are rain and snow mixed, nighttime temperature rapid drawdown, sleet Cheng Bing to block osculum, though outer machine has a defrost process at this time, but because
Osculum block and can not proper drainage, cause liquid condensation water to become ice again, formed on outdoor heat exchanger because of frequent defrost
Frost layer is long without medium well, the final heat exchange for influencing outdoor heat exchanger, this phenomenon can extreme influence unit heat-exchange performance and can
By property.
Invention content
Based on this, the purpose of the present invention is to provide a kind of air-conditioning system and its control methods, realize air-conditioning system
Low-temperature heating deicing function ensures that the ice sheet of outdoor heat exchanger bottom melts completely, makes heat exchanger bottom under the conditions of low-temperature heating
The osculum proper drainage in portion；Ensure that the low-temperature heating capacity of air-conditioning system at low temperatures is unattenuated, realizes the reliable of unit
Property operation.To achieve the above object, technical scheme is as follows：
A kind of air-conditioning system, including compressor, four-way valve, outdoor heat exchanger, subcooler, throttle part, indoor heat exchanger
And switching device；Compressor, four-way valve, outdoor heat exchanger, subcooler, throttle part and indoor heat exchanger set gradually to form system
Cold loop；The outdoor heat exchanger is including the first current-collecting device, the second current-collecting device and is connected to first current-collecting device
With multiple flow tubes between second current-collecting device；
The subcooler includes the first flow channels and the second flow channels, and the first end of first flow channels is connected to
To second current-collecting device, the second end of first flow channels is connected to the throttle part；Described second crosses circulation
The first end in road is connected to the low pressure air suction end of the compressor, second end the first solenoid valve of series connection of second flow channels
It is connected to the second end of first flow channels；The switching device is arranged in series in described first at least one flow tube
Between current-collecting device and second current-collecting device, the switching device is also connected to first solenoid valve, the switching dress
Set the fluid switching at least one flow tube, the switching device can will be from the part that the throttle part flows out
Medium temperature fluid is introduced at least one flow tube.
In one of the embodiments, the switching device include the first triple valve and the second triple valve, the described 1st
There is port valve the first valve port A1, the second valve port B1 and third valve port C1, the first valve port A1 to be connected at least one mistake
The first end of flow tube, the second valve port B1 are connected to first current-collecting device, and the third valve port C1 is connected to described
The first end of one solenoid valve；Second triple valve has the 4th valve port A2, the 5th valve port B2 and the 6th valve port C2；Described 4th
Valve port A2 is connected to the second end of at least one flow tube, and the 5th valve port B2 is connected to second current-collecting device,
The 6th valve port C2 is connected to the second end of first solenoid valve, and the second end of first solenoid valve is connected to described
The second end of two flow channels.
The air-conditioning system further includes second solenoid valve in one of the embodiments, and the second solenoid valve series connection is set
It sets between the first end of second flow channels and the low pressure air suction end of the compressor.
The air-conditioning system further includes the first expansion valve in one of the embodiments, and the first expansion valve series connection is set
It sets between the second end and first solenoid valve of second flow channels.
The air-conditioning system further includes the first check valve in one of the embodiments, and the first check valve series connection is set
It sets between the first end of second flow channels and the intermediate pressure suction end of the compressor, first check valve is permitted
Perhaps refrigerant flows to the intermediate pressure suction end of the compressor from second flow channels.
The outdoor heat exchanger, which is connected on the pipeline between the subcooler, in one of the embodiments, is provided with
Two expansion valves, and being arranged in parallel on second expansion valve allows refrigerant to flow to the subcooler from the outdoor heat exchanger
The second check valve.
The air-conditioning system further includes gas-liquid separator in one of the embodiments, and the gas-liquid separator series connection is set
It sets between the low pressure air suction end and the four-way valve of the compressor.
At least one flow tube is the overcurrent of the lower side of the outdoor heat exchanger in one of the embodiments,
Pipe.
A kind of control method of air-conditioning system is further related to, when the air-conditioning system is in refrigeration mode or heating defrost pattern
When：The first valve port A1 is connected with the second valve port B1, and the 4th valve port A2 is connected with the 5th valve port B2, described
First solenoid valve and the second solenoid valve are opened.
In one of the embodiments, in the case where the air-conditioning system is in heating mode, as Tr ＜ T1, described first is swollen
Swollen valve is opened, and the first valve port A1 is connected with the third valve port C1, and the 4th valve port A2 and the 6th valve port C2 is led
Logical, first solenoid valve and the second solenoid valve are turned off, and the air-conditioning system enters heating deicing mould by heating mode
Formula；Wherein, Tr is outdoor environment temperature, and T1 is the first preset temperature.
The air-conditioning system works the first preset time under the heating deice mode in one of the embodiments,
Or/and Tr, when reaching the second preset temperature T2, the air-conditioning system exits the heating deice mode.
The air-conditioning system is when interval second is default after exiting the heating deice mode in one of the embodiments,
Between be again introduced into the heating deice mode.
In one of the embodiments, as Tr >=T2, first solenoid valve is opened, and the second solenoid valve is closed,
The first valve port A1 is connected with the second valve port B1, and the 4th valve port A2 is connected with the 5th valve port B2, the sky
Adjusting system exits the heating deice mode and enters and heat non-deice mode, wherein T2 is the second preset temperature, T2 ＞ T1.
In one of the embodiments, in the case where the air-conditioning system is in heating mode, as T1≤Tr ＜ T2, institute is judged
State whether air-conditioning system is to first enter heating mode, is removed if so, the air-conditioning system is transferred to heating by the heating mode
Ice pattern enters the non-deice mode of heating, otherwise the sky after running the first preset time under the heating deice mode
Adjusting system is transferred to the non-deice mode of heating by the heating mode；
Under the heating deice mode, the first expansion valve is opened, and the first valve port A1 is led with the third valve port C1
Logical, the 4th valve port A2 is connected with the 6th valve port C2, and first solenoid valve and the second solenoid valve are turned off；
Under the non-deice mode of heating, first solenoid valve is opened, and the second solenoid valve is closed, and described first
Valve port A1 is connected with the second valve port B1, and the 4th valve port A2 is connected with the 5th valve port B2；
Wherein, Tr is outdoor environment temperature, and T1 is the first preset temperature, and T2 is the second preset temperature.
The first preset temperature T1 is -15 DEG C in one of the embodiments, and the second preset temperature T2 is -10
DEG C, first preset time is 30 minutes.
The beneficial effects of the invention are as follows：
The air-conditioning system and its control method of the present invention realizes the stream of at least one flow tube by the way that switching device is arranged
Body commutates, and realizes the low-temperature heating deicing function of air-conditioning system, under the conditions of low-temperature heating, ensures outdoor heat exchanger bottom
Ice sheet melts completely, makes the osculum proper drainage of exchanger base；Ensure the low-temperature heating of air-conditioning system at low temperatures
It measures unattenuated, under normal heating, refrigeration mode, will not all realize the reliability of unit to the occupancy of outdoor heat exchanger branch
Operation.
Description of the drawings
Fig. 1 is that refrigerant flow direction of the air-conditioning system of one embodiment of the invention under refrigeration mode or heating defrost pattern shows
It is intended to；
Fig. 2 is refrigerant flow direction schematic diagram of the air-conditioning system in the case where heating deice mode shown in Fig. 1；
Fig. 3 is refrigerant flow direction schematic diagram of the air-conditioning system in the case where heating non-deice mode shown in Fig. 2；
Wherein,
101 four-way valves；103 outdoor heat exchangers；104 subcoolers；105 throttle part, 106 indoor heat exchanger；
107 first solenoid valves；108 first triple valves；109 second triple valves；110 second solenoid valves；
111 first expansion valves；112 first check valves；113 second expansion valves；114 second check valves；
115 gas-liquid separators；116 first shut-off valves；117 second shut-off valves.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, right with reference to the accompanying drawings and embodiments
The air-conditioning system and its control method of the present invention is further elaborated.It should be noted that in the absence of conflict,
Feature in following embodiment and embodiment can be combined with each other.It should be appreciated that specific embodiment described herein is only used
In explaining the present invention, it is not intended to limit the present invention.
Embodiment one
Referring to figs. 1 to Fig. 3, the air-conditioning system of one embodiment of the invention includes compressor 101, four-way valve 102, outdoor heat exchange
Device 103, subcooler 104, throttle part 105, indoor heat exchanger 106 and switching device.Compressor 101, four-way valve 102, outdoor
Heat exchanger 103, subcooler 104, throttle part 105 and indoor heat exchanger 106 set gradually to form refrigerating circuit.Compressor 101
For enthalpy-increasing compressor, enthalpy-increasing compressor refers to a kind of compressor for increasing gas benefit enthalpy function, it is characterized in that can pass through gaseous state
Coolant injection technology forms second-compressed to gaseous coolant, ultimately forms a kind of 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 current-collecting device and the
Multiple flow tubes between two current-collecting devices.I.e. one end of flow tube is connected to the first overflow means, the other end connection of flow tube
Second current-collecting device.It is the first current-collecting device on the left of the main body of outdoor heat exchanger 103 in Fig. 1, the main body of outdoor heat exchanger 103 is right
Side is the second current-collecting device.Current-collecting device can be header or current divider.Throttle part 105 can be expansion valve, preferably electronics
Expansion valve.
Subcooler 104 includes the first flow channels and the second flow channels.The first end of first flow channels is (in Fig. 1
End) it is connected to the second current-collecting device, the second end (lower end in Fig. 1) of the first flow channels is connected to throttle part 105.Second mistake
The first end (upper end in Fig. 1) of circulation road is connected to the low pressure air suction end of compressor 101, second end (Fig. 1 of the second flow channels
Middle lower end) the first solenoid valve 107 of series connection is connected to the second ends of the first flow channels.
Switching device and at least one flow tube are arranged in series between the first current-collecting device and the second current-collecting device, switching
Device is also connected to the first solenoid valve 107, and fluid of the switching device at least one flow tube switches, switching device energy
It is enough to be introduced at least one flow tube from the part medium temperature fluid that throttle part 105 flows out.Preferably, it is described at least
One flow tube is the flow tube of the lower side of outdoor heat exchanger 103.Switching device and outdoor heat exchanger 103 is most lower in Fig. 1
One flow tube of side is arranged in series between the first current-collecting device and the second current-collecting device, and switching device is used for outdoor heat exchanger
The fluid of one flow tube of 103 lower side switches.
As a kind of preferable mode, as shown in Figure 1, switching device includes the first triple valve 108 and the second triple valve
109.Triple valve is also known as three-way diverter valve, refers to being controlled by progress motor, switch control is carried out to two channels, when a-road-through,
Another way is closed, you can to change the valve class of fluid flow direction.
First triple valve 108 has the first valve port A1, the second valve port B1 and third valve port C1.First valve port A1 is connected to institute
The first end of at least one flow tube is stated, the second valve port B1 is connected to the first current-collecting device, and third valve port C1 is connected to the first electricity
The first end of magnet valve 107.In Fig. 1, the first valve port A1 is connected to a left side for a flow tube of the lower side of outdoor heat exchanger 103
End.
Second triple 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 institute
The second end of at least one flow tube is stated, the 5th valve port B2 is connected to the second current-collecting device, and the 6th valve port C2 is connected to the first electricity
The second end of the second end of magnet valve 107, the first solenoid valve 107 is connected to the second end of the second flow channels.4th valve port in Fig. 1
A2 is connected to the right end of a flow tube of the lower side of outdoor heat exchanger 103.
In the present embodiment, the first end that second solenoid valve 110 is arranged in series in the second flow channels is low with compressor 101
Between pressure suction end.First expansion valve 111 is arranged in series between the second end of the second flow channels and the first solenoid valve 107.
First check valve 112 is arranged in series between the first end of the second flow channels and the intermediate pressure suction end of compressor 101, the
One check valve 112 permission refrigerant flows to the intermediate pressure suction end of compressor 101 from the second flow channels.
In other embodiments, outdoor heat exchanger 103 is connected on the pipeline between subcooler 104 and may be provided with second
Expansion valve 113, and being arranged in parallel on the second expansion valve 113 allows refrigerant to flow to subcooler 104 from outdoor heat exchanger 103
Second check valve 114.It can also be arranged in series gas-liquid separator between the low pressure air suction end and four-way valve 102 of compressor 101
115.First expansion valve 111 and the second expansion valve 113 can be electric expansion valve.
The air-conditioning system of above example realizes the fluid reversing of at least one flow tube by the way that switching device is arranged,
The low-temperature heating deicing function for realizing air-conditioning system ensures that the ice sheet of outdoor heat exchanger bottom is complete under the conditions of low-temperature heating
It melts entirely, makes the osculum proper drainage of outdoor heat exchanger bottom；Ensure the low-temperature heating of air-conditioning system at low temperatures
It measures unattenuated, realizes the reliability operation of unit.
Embodiment two
The control mode of air-conditioning system in above example is as follows：
(1) refrigeration mode or or heating defrost pattern
As shown in Figure 1, when air-conditioning system is in refrigeration mode or heating defrost pattern, the first valve port A1 and the second valve port
B1 is connected, and the 4th valve port A2 is connected with the 5th valve port B2, and the first solenoid valve 107 and second solenoid valve 110 are opened, remaining vigour
Part is controlled according to normal logic.Wherein, air-conditioning system is identical with the refrigerant flow direction under heating defrost pattern in refrigeration mode,
Specifically for flow direction as shown in arrow direction in Fig. 1, the exhaust of compressor 101 flows into outdoor heat exchanger to refrigerant by four-way valve 102
103, the refrigerant flowed out from outdoor heat exchanger 103 enters the second expansion valve 113, and the refrigerant of the second expansion valve 113 of outflow enters
First flow channels of subcooler 104, the refrigerant flowed out from the first flow channels of subcooler 104 is divided into two-way, wherein one
Road successively by throttle part 105, indoor heat exchanger 106, four-way valve 102, gas-liquid separator 115 and return to compressor 101
Low pressure air suction end；Another way successively pass through the first solenoid valve 107, the first expansion valve 111, subcooler 104 the second flow channels,
Second solenoid valve 110 and gas-liquid separator 115 and the low pressure air suction end for returning to compressor 101.
For air-conditioning system under refrigeration mode or heating defrost pattern, outdoor heat exchanger 103 is entirely used for condensation heat dissipation, i.e. room
The branch of external heat exchanger 103 is not occupied, at this point, a part of medium temperature high-pressure refrigerant flows into first by second solenoid valve 107
Expansion valve 111 is acted on by the reducing pressure by regulating flow of the first expansion valve 111, becomes low-temp low-pressure gaseous refrigerant, while being subcooler
104 the first flow channels (main road) cool down, and improve degree of supercooling, and in such a mode, " heating deice mode " does not come into force.
(2) deice mode is heated
With reference to Fig. 2, in the case where air-conditioning system is in heating mode, as Tr ＜ T1, the first expansion valve 111 is opened, the first valve
Mouth A1 is connected with third valve port C1, and the 4th valve port A2 is connected with the 6th valve port C2, the first solenoid valve 107 and second solenoid valve 110
It is turned off, air-conditioning system enters heating deice mode by heating mode.I.e. in the case where heating deice mode, the first expansion valve 111 is opened
It opens, the first valve port A1 is connected with third valve port C1, and the 4th valve port A2 is connected with the 6th valve port C2, the first solenoid valve 107 and second
Solenoid valve 110 is turned off.Wherein, Tr is outdoor environment temperature, and T1 is the first preset temperature.T1 is preferably -15 DEG C.
For example, when outdoor environment temperature Tr is less than -15 DEG C, air-conditioning system enters heating deice mode by heating mode,
In the case where heating deice mode, specifically for flow direction as shown in arrow direction in Fig. 2, the exhaust of compressor 101 passes through four-way valve to refrigerant
102 flow into indoor heat exchanger 106, and the refrigerant flowed out from indoor heat exchanger 106 enters throttle part 105, flows out throttle part 105
Refrigerant be divided into two-way, wherein passing through the first flow channels of subcooler 104 successively all the way, the second expansion valve 113, outdoor are changed
A major cycle is completed at hot device 103, four-way valve 102 and gas-liquid separator 115 and the low pressure air suction end for returning to compressor 101；Separately
The third valve port C1 of the first triple valve 108 is first flowed into all the way, then exits into room from the first valve port A1 of the first triple valve 108
The flow tube of the lower side of external heat exchanger 103, the refrigerant flowed out from the flow tube of the lower side of outdoor heat exchanger 103 flow to the
4th valve port A2 of two triple valves 109, then it is flow to the first expansion valve 111 from the 6th valve port C2 of the second triple valve 109, from first
The refrigerant that expansion valve 111 flows out enters the second flow channels of subcooler 104, and the refrigerant of the second flow channels outflow is through the
One check valve 112 enters the intermediate pressure suction end of compressor 101 and enters in compressor 101.Under this pattern, " heating deicing
Pattern " mechanism in force.
Preferably, air-conditioning system works the first preset time in the case where heating deice mode or/and Tr reaches the second default temperature
When spending T2, air-conditioning system exits heating deice mode.First preset time can be 30 minutes, and the second preset temperature T2 can be -10
℃。
In other embodiments, air-conditioning system exit heating deice mode after can be spaced the second preset time again into
Enter to heat deice mode.Second preset time can be 20-50 minutes, may be, for example, 30 minutes, certain second preset time also may be used
It is arranged to other real numbers.
(3) non-deice mode is heated
As a kind of preferable mode, as shown in figure 3, as Tr >=T2, the first solenoid valve 107 is opened, second solenoid valve
110 close, and the first valve port A1 is connected with the second valve port B1, and the 4th valve port A2 is connected with the 5th valve port B2, and air-conditioning system exits system
Hot deice mode and enter and heat non-deice mode.That is, in the case where heating non-deice mode, the first solenoid valve 107 is opened, second
Solenoid valve 110 is closed, and the first valve port A1 is connected with the second valve port B1, and the 4th valve port A2 is connected with the 5th valve port B2, remaining vigour
Part is controlled according to normal logic.Wherein, T2 is the second preset temperature, T2 ＞ T1.Such as second preset temperature T2 can be -10 DEG C.
For example, when outdoor environment temperature Tr is more than or equal to -10 DEG C or heating deice mode is run 30 minutes, the first electromagnetism
Valve 107 is opened, and second solenoid valve 110 is closed, and the first valve port A1 is connected with the second valve port B1, the 4th valve port A2 and the 5th valve port B2
Conducting, air-conditioning system exit heating deice mode and enter and heat non-deice mode.In the case where heating non-deice mode, refrigerant tool
Body is flowed to as shown in arrow direction in Fig. 3, and the exhaust of compressor 101 flows into indoor heat exchanger 106 by four-way valve 102, from room
The refrigerant that interior heat exchanger 106 flows out enters throttle part 105, and the refrigerant of outflow throttle part 105 is divided into two-way, wherein all the way
Pass through the first flow channels, the second expansion valve 113, outdoor heat exchanger 103, four-way valve 102 and the gas-liquid point of subcooler 104 successively
The low pressure air suction end of compressor 101 is returned to from device 115, completes a major cycle；Another way passes through the first solenoid valve successively
107, the centre of the first expansion valve 111, the second flow channels of subcooler 104 and the first check valve 112 and entrance compressor 101
Pressure suction end finally enters in compressor 101.Under this kind of mode, outdoor heat exchanger 103, which reverts to, is completely used for changing for heating
Hot device is directly entered the second flow channels of subcooler 104 by the refrigerant of the first expansion valve 111, is made by reducing pressure by regulating flow
With becoming low-temp low-pressure gaseous refrigerant, flowed in compressor using intermediate pressure suction end；Under this pattern, " heating deicing
Pattern " failure mechanisms.
, as T1≤Tr ＜ T2, judge air-conditioning in the case where air-conditioning system is in heating mode as another preferable mode
Whether system is to first enter heating mode, if so, air-conditioning system is transferred to heating deice mode by heating mode, is removed in heating
Enter the non-deice mode of heating after running the first preset time under ice pattern, otherwise air-conditioning system is transferred to heating by heating mode
Non- deice mode.For example, when ＜ -10 DEG C of 15 DEG C≤Tr, first enter and controlled according to " heating deice mode ", then according to
" heating non-deice mode " is controlled.
The air-conditioning system and its control method of the above various embodiments realize at least one overcurrent by the way that switching device is arranged
The fluid reversing of pipe realizes the low-temperature heating deicing function of air-conditioning system, under the conditions of low-temperature heating, ensures outdoor heat exchanger
The ice sheet of bottom melts completely, makes the osculum proper drainage of exchanger base；Ensure air-conditioning system at low temperatures low
Warm heating capacity is unattenuated, under normal heating, refrigeration mode, all will not realize unit to the occupancy of outdoor heat exchanger branch
Reliability operation.Its is pollution-free, energy-saving and emission-reduction.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (15)
1. a kind of air-conditioning system, which is characterized in that including compressor (101), four-way valve (102), outdoor heat exchanger (103), mistake
Cooler (104), throttle part (105), indoor heat exchanger (106) and switching device；Compressor (101), four-way valve (102), room
External heat exchanger (103), subcooler (104), throttle part (105) and indoor heat exchanger (106) set gradually to form refrigerating circuit；
The outdoor heat exchanger (103) include the first current-collecting device, the second current-collecting device and be connected to first current-collecting device with
Multiple flow tubes between second current-collecting device；
The subcooler (104) includes the first flow channels and the second flow channels, and the first end of first flow channels connects
Second current-collecting device is passed to, the second end of first flow channels is connected to the throttle part (105)；Described second
The first end of flow channels is connected to the low pressure air suction end of the compressor (101), the second end string of second flow channels
Join the second end that the first solenoid valve (107) is connected to first flow channels；The switching device and at least one flow tube
It is arranged in series between first current-collecting device and second current-collecting device, the switching device is also connected to described first
Solenoid valve (107), fluid of the switching device at least one flow tube switch, and the switching device can will be from
The part medium temperature fluid of throttle part (105) outflow is introduced at least one flow tube.
2. air-conditioning system according to claim 1, which is characterized in that the switching device includes the first triple valve (108)
With the second triple valve (109), first triple valve (108) has the first valve port A1, the second valve port B1 and third valve port C1, institute
The first end that the first valve port A1 is connected at least one flow tube is stated, the second valve port B1 is connected to first afflux
Device, the third valve port C1 are connected to the first end of first solenoid valve (107)；Second triple valve (109) has
4th valve port A2, the 5th valve port B2 and the 6th valve port C2；The 4th valve port A2 is connected to the of at least one flow tube
Two ends, the 5th valve port B2 are connected to second current-collecting device, and the 6th valve port C2 is connected to first solenoid valve
(107) second end of second end, first solenoid valve (107) is connected to the second end of second flow channels.
3. air-conditioning system according to claim 2, which is characterized in that further include second solenoid valve (110), second electricity
Magnet valve (110) is arranged in series between the first end of second flow channels and the low pressure air suction end of the compressor (101).
4. air-conditioning system according to claim 3, which is characterized in that further include the first expansion valve (111), described first is swollen
Swollen valve (111) is arranged in series between the second end of second flow channels and first solenoid valve (107).
5. air-conditioning system according to claim 4, which is characterized in that further include the first check valve (112), described first is single
The intermediate pressure suction end of the first end and the compressor (101) of second flow channels is arranged in series in valve (112)
Between, the first check valve (112) permission refrigerant flows to the centre of the compressor (101) from second flow channels
Pressure suction end.
6. according to claim 1-5 any one of them air-conditioning systems, which is characterized in that outdoor heat exchanger (103) connection
The second expansion valve (113) is provided on to the pipeline between the subcooler (104), and on second expansion valve (113) simultaneously
Connection is provided with the second check valve (114) for allowing refrigerant to flow to the subcooler (104) from the outdoor heat exchanger (103).
7. according to claim 1-5 any one of them air-conditioning systems, which is characterized in that further include gas-liquid separator (115), institute
Gas-liquid separator (115) is stated to be arranged in series between the low pressure air suction end of the compressor (101) and the four-way valve (102).
8. according to claim 1-5 any one of them air-conditioning systems, which is characterized in that at least one flow tube is described
The flow tube of the lower side of outdoor heat exchanger (103).
9. a kind of control method of air-conditioning system, the air-conditioning system is the air-conditioning system described in claim 5, and feature exists
In when the air-conditioning system is in refrigeration mode or heating defrost pattern：
The first valve port A1 is connected with the second valve port B1, and the 4th valve port A2 is connected with the 5th valve port B2, institute
It states the first solenoid valve (107) and the second solenoid valve (110) is opened.
10. the control method of air-conditioning system according to claim 9, which is characterized in that be in system in the air-conditioning system
Under heat pattern, as Tr ＜ T1, first expansion valve (111) is opened, and the first valve port A1 is led with the third valve port C1
Logical, the 4th valve port A2 is connected with the 6th valve port C2, first solenoid valve (107) and the second solenoid valve
(110) it is turned off, the air-conditioning system enters heating deice mode by heating mode；Wherein, Tr is outdoor environment temperature, and T1 is
First preset temperature.
11. the control method of air-conditioning system according to claim 10, which is characterized in that the air-conditioning system is in the system
When first preset time that works under hot deice mode or/and Tr reach the second preset temperature T2, the air-conditioning system exits described
Heat deice mode.
12. the control method of air-conditioning system according to claim 11, which is characterized in that the air-conditioning system is exiting
It is spaced the second preset time after stating heating deice mode and is again introduced into the heating deice mode.
13. the control method of air-conditioning system according to claim 10, which is characterized in that as Tr >=T2, described first
Solenoid valve (107) is opened, and the second solenoid valve (110) is closed, and the first valve port A1 is connected with the second valve port B1, institute
It states the 4th valve port A2 to be connected with the 5th valve port B2, the air-conditioning system exits the heating deice mode and entrance heating is non-
Deice mode, wherein T2 is the second preset temperature, T2 ＞ T1.
14. according to the control method of claim 9-13 any one of them air-conditioning systems, which is characterized in that in the air-conditioning system
System is under the heating mode, as T1≤Tr ＜ T2, judge the air-conditioning system whether be first enter heating mode, if so,
Then the air-conditioning system is transferred to heating deice mode by the heating mode, and it is default that first is run under the heating deice mode
Enter after time and heat non-deice mode, otherwise the air-conditioning system is transferred to the non-deicing mould of heating by the heating mode
Formula；
Under the heating deice mode, the first expansion valve (111) is opened, and the first valve port A1 is led with the third valve port C1
Logical, the 4th valve port A2 is connected with the 6th valve port C2, first solenoid valve (107) and the second solenoid valve
(110) it is turned off；
Under the non-deice mode of heating, first solenoid valve (107) is opened, and the second solenoid valve (110) is closed, institute
It states the first valve port A1 to be connected with the second valve port B1, the 4th valve port A2 is connected with the 5th valve port B2；
Wherein, Tr is outdoor environment temperature, and T1 is the first preset temperature, and T2 is the second preset temperature.
15. the control method of air-conditioning system according to claim 14, which is characterized in that the first preset temperature T1
It it is -15 DEG C, the second preset temperature T2 is -10 DEG C, and first preset time is 30 minutes.
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| CN106016808B true CN106016808B (en) | 2018-08-10 |
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| CN107023948B (en) * | 2017-04-01 | 2020-05-29 | 青岛海尔空调器有限总公司 | Air conditioner and non-stop defrosting operation method thereof |
| CN107023946B (en) * | 2017-04-01 | 2020-05-29 | 青岛海尔空调器有限总公司 | Defrosting operation method for air conditioner without stopping |
| CN106871381B (en) * | 2017-04-01 | 2020-05-29 | 青岛海尔空调器有限总公司 | Defrosting operation method for air conditioner without stopping |
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| CN201748709U (en) * | 2010-07-22 | 2011-02-16 | 康特能源科技(苏州)有限公司 | Deicing air source heat pump |
| CN203687233U (en) * | 2013-09-27 | 2014-07-02 | 广东美的暖通设备有限公司 | Air-conditioning outdoor unit and air-conditioning system with same |
| CN203908098U (en) * | 2014-05-27 | 2014-10-29 | 广东美的制冷设备有限公司 | Air conditioner |
| CN204438585U (en) * | 2015-01-15 | 2015-07-01 | 特灵空调系统(中国)有限公司 | Air-conditioning system |
| CN205784048U (en) * | 2016-05-23 | 2016-12-07 | 珠海格力电器股份有限公司 | Air conditioning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006101567A1 (en) * | 2005-03-18 | 2006-09-28 | Carrier Commercial Refrigeration, Inc. | Bottle cooler defroster and methods |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201748709U (en) * | 2010-07-22 | 2011-02-16 | 康特能源科技(苏州)有限公司 | Deicing air source heat pump |
| CN203687233U (en) * | 2013-09-27 | 2014-07-02 | 广东美的暖通设备有限公司 | Air-conditioning outdoor unit and air-conditioning system with same |
| CN203908098U (en) * | 2014-05-27 | 2014-10-29 | 广东美的制冷设备有限公司 | Air conditioner |
| CN204438585U (en) * | 2015-01-15 | 2015-07-01 | 特灵空调系统(中国)有限公司 | Air-conditioning system |
| CN205784048U (en) * | 2016-05-23 | 2016-12-07 | 珠海格力电器股份有限公司 | Air conditioning system |
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Effective date of registration: 20190508 Address after: No. six, Qianshan Jinji West Road, Zhuhai, Guangdong Province Co-patentee after: Zhuhai Li Li Seiko manufacturing Co., Ltd. Patentee after: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI Address before: 519070, Jinji Hill Road, front hill, Zhuhai, Guangdong Patentee before: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI |
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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 |