CN105352035B - Air conditioner and air conditioner defrosting control method - Google Patents
Air conditioner and air conditioner defrosting control method Download PDFInfo
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- CN105352035B CN105352035B CN201510772744.XA CN201510772744A CN105352035B CN 105352035 B CN105352035 B CN 105352035B CN 201510772744 A CN201510772744 A CN 201510772744A CN 105352035 B CN105352035 B CN 105352035B
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a kind of air conditioners, including First Heat Exchanger, second heat exchanger, four-way valve and compressor, air conditioner further includes the first valve, second valve, third valve and the 4th valve, compressor includes first exhaust branch, second exhaust branch and third exhaust branch, first exhaust branch is connected to four-way valve, First Heat Exchanger includes the first heat exchanger tube and the second heat exchanger tube, the first interface of first heat exchanger tube is connected to third exhaust branch through the second valve, the first interface of the second heat exchanger is connected to through the 4th valve, the first interface of second heat exchanger tube is connected to second exhaust branch through the first valve, the first interface of the second heat exchanger is connected to through third valve.The present invention also proposes a kind of air conditioner defrosting control method.The present invention solves air conditioner in defrosting, the low technical problem of heating efficiency.
Description
Technical field
The present invention relates to air conditioner technical field more particularly to a kind of air conditioners and air conditioner defrosting control method.
Background technique
In the heating process of air-conditioning system, when outdoor heat exchanger surface temperature be lower than 0 DEG C, and be lower than air frost
When point temperature, the vapor on outdoor heat exchanger surface can condense frosting, the heat transfer effect of outdoor heat exchanger be influenced, with frost layer
Increase, the heating effect decline of indoor heat exchanger, leaving air temp reduces.Therefore, it is necessary to remove the frost layer on outdoor heat exchanger, really
Protect heating effect.
Existing Defrost mode, first heating out of service are converted to refrigeration mode if it still cannot remove clean frost, this
When high temperature refrigerant condense heat release within the condenser, heat melts the frost in condenser, and still, during defrosting, air-conditioning is not
Heating operation is carried out again, opposite air conditioner room unit heat exchanger can also siphon away partial heat from interior, room temperature is caused to reduce,
Reduce the heating efficiency of air conditioner.
Summary of the invention
The present invention provides a kind of air conditioner and air conditioner defrosting control method, and main purpose is that solving air conditioner is removing
When white, the low technical problem of heating efficiency.
To achieve the above object, the present invention provides a kind of air conditioner, and the air conditioner includes First Heat Exchanger, the second heat exchange
Device, four-way valve and compressor, the air conditioner further include the first valve, the second valve, third valve and the 4th valve, and the compressor includes
First exhaust branch, second exhaust branch and third exhaust branch, the first exhaust branch is connected to the four-way valve, described
First Heat Exchanger includes the first heat exchanger tube and the second heat exchanger tube, and the first interface of first heat exchanger tube is connected through second valve
The first interface of second heat exchanger is connected to the third exhaust branch, the 4th valve, second heat exchanger tube
First interface is connected to the second exhaust branch through first valve, is connected to second heat exchanger through the third valve
First interface.
Preferably, the air conditioner further includes the 5th valve and the 6th valve, described in the first interface warp of first heat exchanger tube
5th valve is connected to the second interface of second heat exchanger tube, and the second interface of second heat exchanger tube is connected through the 6th valve
To the four-way valve.
Preferably, the air conditioner further includes the first temperature-detecting device being arranged on first heat exchanger tube, and
Second temperature detection device on second heat exchanger tube is set.
To achieve the above object, the present invention also provides a kind of air conditioner defrosting control method, air conditioner defrosting controlling parties
Method includes:
When the air conditioner is heating mode, the temperature that each temperature-detecting device detects is obtained in real time；
When detecting the temperature of the heat exchanger tube less than the first preset temperature, other in addition to the heat exchanger tube are judged
Whether heat exchanger tube is in heating mode；
When having detected that the heat exchanger tube is in heating mode operation, the temperature is controlled less than the first preset temperature
Heat exchanger tube enters defrosting mode.
Preferably, described when having detected that the heat exchanger tube is in heating mode operation, the temperature is controlled less than the
After the step of heat exchanger tube of one preset temperature enters defrosting mode, the air conditioner defrosting control method further include:
When the temperature for detecting the heat exchanger tube in defrosting mode is greater than the second preset temperature, the heat exchange is controlled
Pipe exits defrosting mode, wherein second preset temperature is greater than first preset temperature.
Preferably, when the air conditioner is heating mode, real-time the step of obtaining the temperature that temperature-detecting device detects
Later, the air conditioner defrosting control method further include:
When the temperature for detecting all heat exchanger tubes is respectively less than the first preset temperature, the heat exchanger tube for controlling preset number enters
Defrosting mode defrosts, wherein the preset number is less than the total number of heat exchanger tube.
Preferably, when the air conditioner is heating mode, the temperature for the heat exchanger tube that temperature-detecting device detects is obtained in real time
After the step of spending, the air conditioner defrosting control method further include:
When the temperature that first temperature-detecting device detects is less than the first preset temperature and second heat exchanger tube is
When heating mode, control that second valve is opened, the 4th valve is closed so that refrigerant enter the first heat exchanger tube heat release into
Row defrosting；
When the temperature that the second temperature detection device detects is less than the first preset temperature and first heat exchanger tube is
When heating mode, control that first valve is opened, the third valve is closed so that refrigerant enter the second heat exchanger tube heat release into
Row defrosting.
Preferably, control second valve is opened, the 4th valve is closed, so that refrigerant enters first heat exchange
After the step of pipe heat release is defrosted, the air conditioner defrosting control method further include:
When the temperature that first temperature-detecting device detects is greater than the second preset temperature, controls second valve and close
It closes, the 4th valve unlatching, so that first heat exchanger tube restores heating mode；
Control first valve is opened, the third valve is closed, so that refrigerant enters the second heat exchanger tube heat release
After the step of being defrosted, the air conditioner defrosting control method further include:
When the temperature that the second temperature detection device detects is greater than the second preset temperature, controls first valve and close
It closes, third valve unlatching, so that second heat exchanger tube restores heating mode.
Preferably, when the air conditioner is heating mode, real-time the step of obtaining the temperature that temperature-detecting device detects
Before, the air conditioner defrosting control method further include:
When receiving heating operation instruction, controls the third valve, the 4th valve and the 6th valve and be in unlatching
State controls first valve, second valve and the 5th valve and is in close state, so that the air conditioner enters heating
Mode operation.
Preferably, the air conditioner defrosting control method further include:
It when receiving refrigerating operaton instruction, controls the third valve and the 5th valve is in the open state, control institute
It states the first valve, second valve, the 4th valve and the 6th valve to be in close state, so that the air conditioner enters refrigeration
Mode operation.
Air conditioner and air conditioner defrosting control method proposed by the present invention, be arranged in First Heat Exchanger the first heat exchanger tube and
Second heat exchanger tube, and multiple valves are provided with to realize the adjusting of refrigerant flow direction in circuit on the road Liang Gezhi, and then are realized and existed
When being defrosted for the first heat exchanger tube, the second heat exchanger tube still can continue as indoor according in conventional evaporation process
Heating, likewise, the first heat exchanger tube still can be according in conventional evaporation when being defrosted for the second heat exchanger tube
Journey continues as indoor heating, improves heating efficiency of the air conditioner in defrosting.
Detailed description of the invention
Fig. 1 is the attachment structure schematic diagram of the air condition of that present invention preferred embodiment；
Fig. 2 is the flow chart of the air condition of that present invention defrosting control method first embodiment；
Fig. 3 is the flow chart of the air condition of that present invention defrosting control method second embodiment；
Fig. 4 is the flow chart of the air condition of that present invention defrosting control method 3rd embodiment；
Fig. 5 is the flow chart of the air condition of that present invention defrosting control method fourth embodiment；
Fig. 6 is the flow chart of the 5th embodiment of the air condition of that present invention defrosting control method.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of air conditioner, shown referring to Fig.1, shows for the connection structure of the air condition of that present invention preferred embodiment
It is intended to.
In the present embodiment, air conditioner 100 includes compressor 10, First Heat Exchanger 20, the second heat exchanger 30 and four-way valve
40, air conditioner 100 further includes the first valve 51, the second valve 52, third valve 53 and the 4th valve 54, and compressor 10 includes first exhaust branch
Road 11, second exhaust branch 12 and third exhaust branch 13, first exhaust branch 11 are connected to four-way valve 40, First Heat Exchanger 20
Including the first heat exchanger tube 21 and the second heat exchanger tube 22, the first interface 211 of the first heat exchanger tube 21 is connected to third through the second valve 52
Exhaust branch 13, the first interface 31 that the second heat exchanger 30 is connected to through the 4th valve 54, the first interface 221 of the second heat exchanger tube 22
Second exhaust branch 12 is connected to through the first valve 51, the first interface 31 of the second heat exchanger 30 is connected to through third valve 53.
The air conditioner 100 that the present embodiment proposes, First Heat Exchanger 20 are located outside, and the second heat exchanger 30 is located at interior.?
When heating operation, First Heat Exchanger 20 is used as evaporator refrigeration, and the second heat exchanger 30 is heated as condenser, in refrigerating operaton
When, First Heat Exchanger 20 is heated as condenser, and the second heat exchanger 30 is used as evaporator refrigeration.It is arranged in First Heat Exchanger 20
There are the first heat exchanger tube 21 and the second heat exchanger tube 22, and first exhaust branch 11, the are set at the exhaust outlet of compressor 10 14
Two exhaust branches 12 and third exhaust branch 13 pass through the first valve 51 and the second valve 52 for second exhaust branch 12 and third respectively
Exhaust branch 13 is connected to the second heat exchanger tube 22 and the first heat exchanger tube 21 of First Heat Exchanger 20, meanwhile, First Heat Exchanger 20
Second heat exchanger tube 22 and the first heat exchanger tube 21 are also connected to the first of the second heat exchanger by third valve 53 and the 4th valve 54 respectively
Interface 31.In this way, forming two branches, i.e. the first heat exchanger tube 21 and the second heat exchange in First Heat Exchanger 20 when heating operation
Pipe 22, and can be according to the source for needing to control refrigerant.When heating, third valve 53 and the 4th valve 54 are opened, high in compressor
The gaseous coolant of warm high pressure enters the liquid refrigerants after the condensation heat release of the second heat exchanger 30 as high temperature and pressure, expanded valve (figure
In not mark) liquid refrigerants that becomes low-temp low-pressure afterwards, respectively enter the second heat exchanger tube 22 from third valve 53 and the 4th valve 54
With 21 evaporation endothermic of the first heat exchanger tube.It is if desired the first heat exchanger tube of outdoor unit in the heating process of air conditioner 100
21 when being defrosted, and can control that the second valve 52 is opened, the 4th valve 54 is closed, and so that the first heat exchanger tube 21 is defrosted, is not influenced
Second heat exchanger tube continues to continue indoor unit as condenser indoor heating as evaporator refrigeration, at this point, compressor 10
High temperature and pressure refrigerant carry out condensation heat release, the pipeline of the first heat exchanger tube 21 into the first heat exchanger tube 21 through third exhaust branch 13
Temperature rapidly rises, and is melted the frost layer outside fin and pipeline by the heat exchange of pipeline, and at the same time, the second heat exchanger tube 22 is still
In conventional evaporation process, therefore the second heat exchanger 30 still can be used as condenser and be continuously indoor heating, not influence user
Use.Defrosting for the second heat exchanger tube 22, principle are same as above, repeat no more.
Further, air conditioner 100 further includes the 5th valve 55 and the 6th valve 56, the first interface 211 of the first heat exchanger tube 21
The second interface 222 of the second heat exchanger tube 22 is connected to through the 5th valve 55, the second interface 222 of the second heat exchanger tube 22 is through the 6th valve 56
It is connected to four-way valve 40.In the present embodiment, the first valve 51, the second valve 52, third valve 53, the 4th valve 54, the 5th valve 55 and
Six valves 56 are preferably solenoid valve.
Since the First Heat Exchanger 20 of the air conditioner 100 in the present invention is arranged there are two branch, in heating mode
When with refrigeration mode, the flow direction of refrigerant and circuit are different from, when receiving heating operation instruction, control third valve 53, the
Four valves 54 and the 6th valve 56 are in the open state, and the first valve 51 of control, two valves 52 and the 5th valve 55 are in close state, with connection
Heating circuit makes air conditioner enter heating mode operation, and the gaseous coolant of high temperature and pressure is discharged to first exhaust branch by compressor
11, by reaching the second heat exchanger 30 after four-way valve 40, by becoming high temperature and pressure liquid after 30 exothermic condensation of the second heat exchanger
Refrigerant reaches the first interface of First Heat Exchanger 20.Since third valve 53, the 4th valve 54 are opened, refrigerant passes through third respectively at this time
Valve 53 and the 4th valve 54, which divide, enters the second heat exchanger tube 22 and the first heat exchanger tube 21 for two-way.It is evaporated by two-way heat exchanger tube
Refrigerant is flowed out from 21 second interface 212 of the first heat exchanger tube, the second interface 222 of the second heat exchanger tube 22 respectively, after accumulating all the way
Next circulation is carried out in compressor 10 by returning to after four-way valve 40.
In refrigerating operaton, third valve 53 and the 5th valve 55 are in the open state, the first valve 51, the second valve 52, the 4th valve
54 and the 6th valve 56 be in close state, refrigerant from the second interface 212 of the first heat exchanger tube 21 enter First Heat Exchanger 20 after,
It is flowed out from the first interface 211 of the first heat exchanger tube 21, then enters the second heat exchanger tube 22 through the 5th valve 55, be then out the first heat exchange
Device 20 returns after third valve 53 enters 30 evaporation endothermic of the second heat exchanger and carries out next circulation in compressor 10.
Further, air conditioner 100 further includes the first temperature-detecting device being arranged on first heat exchanger tube 21, and
Second temperature detection device on second heat exchanger tube 22, the first temperature-detecting device and second temperature detection device are set
For detecting the temperature of the first heat exchanger tube 21 and the second heat exchanger tube 22, to judge whether to carry out to defrost or whether exit to remove
White mode, in the present embodiment, temperature-detecting device can be preferably temperature sensing package, in other embodiments, can also use temperature
Sensor.
Moreover, compressor 10 arranges the gaseous coolant of high temperature and pressure when the operational mode of air conditioner 100 is heating mode
First exhaust branch 11 is arrived out, by reaching the second heat exchanger 30 after four-way valve 40, after 30 exothermic condensation of the second heat exchanger
As high temperature and pressure liquid refrigerant, the liquid refrigerants for becoming low-temp low-pressure after expanded valve reaches First Heat Exchanger 20, at this point, the
Three valves 53 and the 4th valve 54 are open state, and refrigerant passes through third valve 53 respectively and the 4th valve 54 divides and enters the second heat exchange for two-way
Pipe 22 and the first heat exchanger tube 21.The refrigerant of low-temp low-pressure is divided into two-way evaporation and shortens process, to reduce refrigerant in pipeline
In resistance, improve heating effect, effectively slow down under low temperature heat frosting speed.
It is understood that can be outdoor heat exchanger for the First Heat Exchanger 20 of air conditioner in other embodiments
Three or three or more branch heat exchanger tubes are set, resistance of the refrigerant in pipeline is further decreased, improve heating effect simultaneously
Slow down the speed for heating frosting under low temperature, and valve is set for each branch, in heating mode and is removed for controlling brancher
Switch between white mode.
The air conditioner 100 that the present embodiment proposes, is arranged the first heat exchanger tube 21 and the second heat exchanger tube in First Heat Exchanger 20
22, and multiple valves are provided with to realize the adjusting of refrigerant flow direction in circuit on the road Liang Gezhi, and then are realized and changed for first
When heat pipe 21 is defrosted, the second heat exchanger tube 22 is still within conventional evaporation process, therefore the second heat exchanger 30 still can be used as
Condenser continues as indoor heating, likewise, when being defrosted for the second heat exchanger tube 22, the first heat exchanger tube 21 still can be with
According to the evaporation process in routine, therefore the second heat exchanger 30 still can be used as condenser and continue as indoor heating, and being not necessarily to will
Air conditioner 100, which is switched to refrigeration mode operation, can be realized defrosting, not influence the use of user.
Based on above-mentioned air conditioner 100, the present invention also provides a kind of air conditioner defrosting control methods.
It is the flow chart of the air condition of that present invention defrosting control method first embodiment referring to shown in Fig. 2.
In the first embodiment, which includes:
Step S10 when the air conditioner is heating mode, obtains the temperature that temperature-detecting device detects in real time.
The air conditioner defrosting control method that the present embodiment proposes is not intended to limit the quantity of heat exchanger tube in First Heat Exchanger, can be with
For being provided with the air conditioner of two or more heat exchanger tube branches, set for each branch heat exchanger tube in First Heat Exchanger
Temperature-detecting device is set, to judge whether the branch heat exchanger tube carries out defrosting and the completion that whether defrosts.In the present embodiment
In, when detecting that air conditioner 100 enters heating mode, the temperature that timing acquisition temperature-detecting device detects is obtained with basis
The temperature got judges whether the corresponding heat exchanger tube of the temperature-detecting device needs to defrost.
Step S20, when detecting the temperature of the heat exchanger tube less than the first preset temperature, judgement removes the heat exchanger tube
Whether other outer heat exchanger tubes are in heating mode.
It is pre- less than first to control the temperature when having detected that the heat exchanger tube is in heating mode operation by step S30
If the heat exchanger tube of temperature enters defrosting mode.
When the temperature that one or more temperature-detecting device detects is less than the first preset temperature, illustrate temperature detection
The corresponding heat exchanger tube of device defrosts, at this point, in order to ensure the indoor unit of air conditioner 100 still is able to normally heat,
Need to judge in addition to temperature be normal less than whether there is heat exchanger tube in other heat exchanger tubes other than the heat exchanger tube of the first preset temperature
Heating mode can guarantee the normal use of indoor unit, at this point it is possible to control these when there is heat exchanger tube to be normal heating mode
The heat exchanger tube that temperature needs to defrost less than the first preset temperature enters defrosting mode and defrosts, wherein the first preset temperature
Preferably -3 DEG C -- 6 DEG C.
Defrost into defrosting mode about above-mentioned and can be exemplified below two ways: one there are many embodiment
In embodiment, the valve of these branch roads can be closed with disconnect these temperature less than the first preset temperature changing for needing to defrost
Heat pipe branch stops the heating operation of the branch, until the frost layer outside heat exchanger tube melts.In another embodiment, Ke Yitong
The flow direction for crossing valve regulated refrigerant makes compressor high temperature high pressure refrigerant be directly entered the branch and carries out condensation heat release, makes to exchange heat
Frost layer outside pipe quickly melts.
It, can be with it is understood that when judging whether other heat exchanger tubes in addition to the heat exchanger tube are in heating mode
Change of the temperature that open state, the flow direction of refrigerant or temperature-detecting device by detecting valve detect in certain time length
The methods of change trend judges.
It should be noted that the air conditioner 100 of the present embodiment is exemplified below two kinds there are many method for exiting defrosting mode
Mode: in one embodiment, can reach certain preset temperature value in the temperature of the heat exchanger tube under detecting defrosting mode, control
It makes it and exits defrosting mode, above-mentioned preset temperature value can obtain certain numberical range according to experiment；In another embodiment,
It can control the operation duration backed off after random defrosting mode of defrosting mode, which can also obtain according to experiment, that is, pass through
After certain time length, the frost layer outside the heat exchanger tube can be melted, and can restore normal heating mode operation.
The air conditioner defrosting control method that the present embodiment proposes is detecting heat exchanger tube temperature lower than the first preset temperature
And when being defrosted, judging whether there is temperature more than or equal to the heat exchanger tube of the first preset temperature is heating mode, if
Have, that is, can guarantee the normal heating of indoor unit, then the heat exchanger tube branch for controlling temperature lower than the first preset temperature enters defrosting mould
Formula, while ensure that defrosting, indoor continues to heat, and can be realized it is not necessary that air conditioner 100 is switched to refrigeration mode operation
Defrosting improves heating efficiency of the air conditioner in defrosting.
Referring to shown in Fig. 3, the first embodiment based on invention air conditioner defrosting control method proposes that the air condition of that present invention is removed
The second embodiment of white control method.In the present embodiment, the difference of the method and first embodiment is, in step S30
Later, the air conditioner defrosting control method further include:
Step S40, when the temperature for detecting the heat exchanger tube in defrosting mode is greater than the second preset temperature, control
The heat exchanger tube exits defrosting mode, wherein second preset temperature is greater than first preset temperature.
Although when still thering are other heat exchanger tubes to be in normal heating mode, ensure that indoor unit in the defrosting of some heat exchanger tubes
Heating, but heating capacity at this time relative to all heating pipes normal heating when heating capacities it is smaller, therefore, in order to restore
The normal heating of air conditioner whole system, and in order to which the heat exchanger tube to defrost to other needs defrosts, be in detecting
When the temperature of the heat exchanger tube of defrosting mode is greater than the second preset temperature, wherein the second preset temperature is preferably 24 DEG C -27 DEG C, control
Heat exchanger tube processed exits defrosting mode, is restored to normal heating mode.
The air conditioner defrosting control method that the present embodiment proposes, is restored to higher temperature in the temperature for detecting heat exchanger tube
When, judge that frost layer melts, defrosting is completed, and can be exited defrosting mode by controller in time, is restored to normal heating mode.
Referring to shown in Fig. 4, the first embodiment based on invention air conditioner defrosting control method proposes that the air condition of that present invention is removed
The 3rd embodiment of white control method.In the present embodiment, the difference of the method and first embodiment is, in step S10
Later, the air conditioner defrosting control method further include:
Step S50 controls changing for preset number when the temperature for detecting all heat exchanger tubes is respectively less than the first preset temperature
Heat pipe enters defrosting mode and defrosts, wherein the preset number is less than the total number of heat exchanger tube.
If the temperature for being detected simultaneously by all heat exchanger tubes of First Heat Exchanger 20 is respectively less than the first preset temperature, at this point,
Air conditioner can select the heat exchanger tube of certain amount to enter defrosting mode to defrost in whole heat exchanger tubes, other heat exchanger tubes
Continuation is run with heating mode, to guarantee the normal heating of indoor unit；Wherein, preset number is less than in First Heat Exchanger 20 and exchanges heat
The sum of pipe, air conditioner can be randomly selected, and can also select from top to bottom or from left to right according to the erection sequence of heat exchanger tube
It selects.
If in order to preferentially guarantee the heating of indoor, the preset number can be smaller, such as one heat exchanger tube elder generation of selection
It defrosts, if can only stay a heat exchanger tube to continue to run heating mode, others heat exchange to guarantee preferentially to defrost
Guan Jun enters defrosting mode, which can also be preset by user.
The air conditioner defrosting control method that the present embodiment proposes, when the temperature of all heat exchanger tubes is respectively less than the first preset temperature
When, select the heat exchanger tube of certain amount to defrost, to guarantee that indoor unit normally heats.
According to shown in Fig. 5, first embodiment, second embodiment or third based on invention air conditioner defrosting control method are implemented
Example proposes the fourth embodiment of the air condition of that present invention defrosting control method.In the present embodiment, the First Heat Exchanger of air conditioner 100
20 include the first heat exchanger tube 21 and the second heat exchanger tube 22, after step slo, this method further include:
Step S60, when the temperature that first temperature-detecting device detects is less than the first preset temperature and described second
When heat exchanger tube is heating mode, the second valve unlatching, the 4th valve closing are controlled, so that refrigerant enters first heat exchange
Pipework condensation heat release defrosts.
When the first temperature-detecting device detects the temperature of the first heat exchanger tube 21 less than the first preset temperature, illustrate first
Heat exchanger tube 21 needs to defrost, and at this time in order to ensure the indoor unit of air conditioner 100 still is able to normally heat, needs to judge that second changes
Whether heat pipe 22 is normal heating mode, and the present embodiment is to judge the second heat exchanger tube for open state by judging third valve 53
Normal heating mode can also be by judging that the first valve 51 is in off state and third valve 53 is opening state in other embodiments
State come judge the second heat exchanger tube 22 for normal heating mode, at this point, by control the second valve 52 open, the 4th valve 54 close, with
Make high temperature and pressure refrigerant enter the condensation heat release of the first heat exchanger tube 21 to defrost.
Further, in other embodiments, when the temperature that first temperature-detecting device detects in preset duration
Degree is continuously less than the first preset temperature and when second heat exchanger tube is heating mode, control second valve open, described the
Four valves are closed, so that refrigerant enters the first heat exchanger tube heat release and defrosts.
In order to avoid temperature-detecting device is influenced when detecting temperature by outdoor environment, setting preset duration is judged
The temperature regime of First Heat Exchanger 20 can be more accurately judged, if the constant temperature detected in preset duration is lower than
First preset temperature, then the temperature of the first heat exchanger tube 21 detected at this time is more stable, it can be determined that defrost.
Further, after condensing heat release in the first heat exchanger tube 21 through refrigerant after a period of time, the first temperature detection dress
Setting can detect that constant temperature rises, when detecting that temperature is greater than the second preset temperature, the closing of the second valve 52 of control, the 4th valve
54 open so that the first heat exchanger tube 21 exits defrosting mode, normal heating mode are switched to, to guarantee indoor unit heating capacity.Its
In, above-mentioned first preset temperature and the second preset temperature can be set according to the actual motion environment of air-conditioning and the demand of user
Set, or suitable temperature range measured according to experiment, in the present embodiment, the first preset temperature is preferably -3 DEG C -- 6 DEG C, the
Two preset temperatures are preferably 24 DEG C -27 DEG C.
When the temperature that the second temperature detection device detects is less than the first preset temperature and first heat exchanger tube is
When heating mode, control that first valve is opened, the third valve is closed so that refrigerant enter the second heat exchanger tube heat release into
Row defrosting.
When the temperature that the second temperature detection device detects is greater than the second preset temperature, controls first valve and close
It closes, the third valve is opened.
Process and principle when being defrosted for the second heat exchanger tube 22 defrost with the first heat exchanger tube 21 it is identical, herein no longer
It repeats.Only when for the defrosting of the second heat exchanger tube 22, is opened by the first valve 51 of control, third valve 53 closes to realize.
It is understood that the present invention can be equally used for the air conditioner of setting three or three or more heat exchanger tube,
Each road setting valve switches between defrosting mode and normal heating mode for controlling brancher.And multiple of setting
Road can further decrease resistance of the refrigerant in pipeline, improve heating effect and slow down the speed for heating frosting under low temperature.
The air conditioner defrosting control method that the present embodiment proposes, defrosts detecting that heat exchanger tube temperature is lower
When, the valve of two branch roads by adjusting First Heat Exchanger 20 is realized when being defrosted for the first heat exchanger tube 21, second
Heat exchanger tube 22 is still within conventional evaporation process, therefore the second heat exchanger 30 still can be used as condenser and continue as indoor system
Heat, likewise, first heat exchanger tube 21 still can be according in conventional evaporation when being defrosted for the second heat exchanger tube 22
Journey, therefore the second heat exchanger 30 still can be used as condenser and continue as indoor heating, improve heating of the air conditioner in defrosting
Efficiency.
Referring to shown in Fig. 6, the fourth embodiment based on invention air conditioner defrosting control method proposes that the air condition of that present invention is removed
The second embodiment of white control method.In the present embodiment, the difference of the method and fourth embodiment is, in step S10
Before, the air conditioner defrosting control method further include:
Step S70 controls the third valve, the 4th valve and the 6th valve when receiving heating operation instruction
It is in the open state, it controls first valve, second valve and the 5th valve and is in close state, so that the air conditioner
It is run into heating mode.
Since the First Heat Exchanger 20 of the air conditioner 100 in the present invention is arranged there are two branch, in heating mode
When with refrigeration mode, the flow direction of refrigerant and circuit are different from, when receiving heating operation instruction, control third valve 53, the
Four valves 54 and the 6th valve 56 are in the open state, and the first valve 51 of control, two valves 52 and the 5th valve 55 are in close state, with connection
Heating circuit makes air conditioner enter heating mode operation, and the gaseous coolant of high temperature and pressure is discharged to first exhaust branch by compressor
11, by reaching the second heat exchanger 30 after four-way valve 40, by becoming high temperature and pressure liquid after 30 exothermic condensation of the second heat exchanger
Refrigerant reaches the first interface of First Heat Exchanger 20.Since third valve 53, the 4th valve 54 are opened, refrigerant passes through third respectively at this time
Valve 53 and the 4th valve 54, which divide, enters the second heat exchanger tube 22 and the first heat exchanger tube 21 for two-way.It is evaporated by two-way heat exchanger tube
Refrigerant is flowed out from 21 second interface 212 of the first heat exchanger tube, the second interface 222 of the second heat exchanger tube 22 respectively.After accumulating all the way
Next circulation is carried out in compressor 10 by returning to after four-way valve 40.
Further, it when receiving refrigerating operaton instruction, controls the third valve and the 5th valve is in opening state
State controls first valve, second valve, the third valve and the 6th valve and is in close state, so that the air-conditioning
Device enters refrigeration mode operation.
In refrigerating operaton, third valve 53 and the 5th valve 55 are in the open state, the first valve 51, the second valve 52, the 4th valve
54 and the 6th valve 56 be in close state, refrigerant from the second interface 212 of the first heat exchanger tube 21 enter First Heat Exchanger 20 after,
It is flowed out from the first interface 211 of the first heat exchanger tube 21, then enters the second heat exchanger tube 22 through the 5th valve 55, be then out the first heat exchange
Device 20 returns after third valve 53 enters 30 evaporation endothermic of the second heat exchanger and carries out next circulation in compressor 10.
The air conditioner defrosting control method that the present embodiment proposes, after the second heat exchanger 30, the refrigerant point of low-temp low-pressure
Process is shortened for two-way evaporation, to reduce resistance of the refrigerant in pipeline, heating effect is improved, effectively slows down low
The speed of the lower heating frosting of temperature.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (7)
1. a kind of air conditioner, including First Heat Exchanger, the second heat exchanger, four-way valve and compressor, it is characterised in that:
The air conditioner further includes the first valve, the second valve, third valve, the 4th valve, the 5th valve and the 6th valve；
The compressor includes first exhaust branch, second exhaust branch and third exhaust branch, and the first exhaust branch connects
It is connected to the four-way valve；
The First Heat Exchanger includes the first heat exchanger tube and the second heat exchanger tube, and the first interface of first heat exchanger tube is through described the
Two valves are connected to the third exhaust branch, are connected to the first interface of second heat exchanger through the 4th valve, and described
The first interface of two heat exchanger tubes is connected to the second exhaust branch through first valve, is connected to described through the third valve
The first interface of two heat exchangers；
The first interface of first heat exchanger tube is connected to the second interface of second heat exchanger tube through the 5th valve, and described
The second interface of two heat exchanger tubes is connected to the four-way valve through the 6th valve；
It is provided with the first temperature-detecting device on first heat exchanger tube, second temperature detection is provided on second heat exchanger tube
Device；
The First Heat Exchanger is used in heating operation as evaporator refrigeration and in refrigerating operaton as condenser system
Heat；Second heat exchanger is used to heat and in refrigerating operaton as condenser as evaporator system in heating operation
It is cold.
2. a kind of air conditioner defrosting control method, which is characterized in that the air conditioner is air conditioner described in claim 1, institute
Stating air conditioner defrosting control method includes:
When receiving heating operation instruction, it is in the open state to control the third valve, the 4th valve and the 6th valve,
It controls first valve, second valve and the 5th valve to be in close state, so that the air conditioner enters heating mode
Operation；
When the air conditioner is heating mode, the temperature that each temperature-detecting device detects is obtained in real time；
When detecting the temperature of the heat exchanger tube less than the first preset temperature, other heat exchange in addition to the heat exchanger tube are judged
Whether pipe is in heating mode；
When having detected that the heat exchanger tube is in heating mode operation, heat exchange of the temperature less than the first preset temperature is controlled
Pipe enters defrosting mode.
3. air conditioner defrosting control method according to claim 2, which is characterized in that described to have detected the heat exchange
Pipe in heating mode operation when, control the step of temperature enters defrosting mode less than the heat exchanger tube of the first preset temperature it
Afterwards, the air conditioner defrosting control method further include:
When the temperature for detecting the heat exchanger tube in defrosting mode is greater than the second preset temperature, controls the heat exchanger tube and move back
Defrosting mode out, wherein second preset temperature is greater than first preset temperature.
4. air conditioner defrosting control method according to claim 2, which is characterized in that the air conditioner is heating mode
When, in real time obtain temperature-detecting device detect temperature the step of after, the air conditioner defrosting control method further include:
When the temperature for detecting all heat exchanger tubes is respectively less than the first preset temperature, the heat exchanger tube for controlling preset number enters defrosting
Mode defrosts, wherein the preset number is less than the total number of heat exchanger tube.
5. air conditioner defrosting control method according to claim 3, which is characterized in that the air conditioner is heating mode
When, after the step of obtaining the temperature of the heat exchanger tube that detects of temperature-detecting device in real time, the air conditioner defrosting control method
Further include:
When the temperature that first temperature-detecting device detects is less than the first preset temperature and second heat exchanger tube is heating
When mode, the second valve unlatching, the 4th valve closing are controlled, so that refrigerant enters the first heat exchanger tube heat release and removed
Frost；
When the temperature that the second temperature detection device detects is less than the first preset temperature and first heat exchanger tube is heating
When mode, the first valve unlatching, third valve closing are controlled, so that refrigerant enters the second heat exchanger tube heat release and removed
Frost.
6. air conditioner defrosting control method according to claim 5, which is characterized in that control second valve is opened
It opens, the 4th valve closing, so that refrigerant enters after the step of the first heat exchanger tube heat release is defrosted, the air conditioner
Defrosting control method further include:
When the temperature that first temperature-detecting device detects is greater than the second preset temperature, control the second valve closing,
4th valve is opened, so that first heat exchanger tube restores heating mode；
Control first valve is opened, the third valve is closed, so that refrigerant is carried out into the second heat exchanger tube heat release
After the step of defrosting, the air conditioner defrosting control method further include:
When the temperature that the second temperature detection device detects is greater than the second preset temperature, control the first valve closing,
The third valve is opened, so that second heat exchanger tube restores heating mode.
7. air conditioner defrosting control method according to claim 5, which is characterized in that the air conditioner defrosting control method
Further include:
It when receiving refrigerating operaton instruction, controls the third valve and the 5th valve is in the open state, control described the
One valve, second valve, the 4th valve and the 6th valve are in close state, so that the air conditioner enters refrigeration mode
Operation.
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| CN201510772744.XA CN105352035B (en) | 2015-11-12 | 2015-11-12 | Air conditioner and air conditioner defrosting control method |
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| CN107264222B (en) * | 2017-06-08 | 2019-06-07 | 珠海格力电器股份有限公司 | A kind of control method of air-conditioning system, device and air-conditioning system |
| CN107401851B (en) * | 2017-09-08 | 2020-03-13 | 海信（广东）空调有限公司 | Air conditioner system and control method for defrosting without stopping air conditioner system |
| CN110332653B (en) * | 2019-07-10 | 2020-07-24 | 珠海格力电器股份有限公司 | Outdoor unit defrosting control method, device and equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635969A (en) * | 2012-04-11 | 2012-08-15 | 广东美的制冷设备有限公司 | Air conditioner |
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| JPH079331B2 (en) * | 1986-12-26 | 1995-02-01 | 松下電器産業株式会社 | Operation control method for heat pump type air conditioner |
| JPH07174389A (en) * | 1993-12-16 | 1995-07-14 | Mitsubishi Heavy Ind Ltd | Defrosting controller for air-conditioning machine |
| JP2982939B2 (en) * | 1994-03-11 | 1999-11-29 | 株式会社富士通ゼネラル | Air conditioner defrost control device |
| KR100210086B1 (en) * | 1996-12-20 | 1999-07-15 | 윤종용 | Defrost operating change device and method of airconditioner |
| CN100580346C (en) * | 2006-11-17 | 2010-01-13 | 海尔集团公司 | Air-conditioner defrosting method |
| CN103411340B (en) * | 2013-07-18 | 2016-09-21 | Tcl空调器(中山)有限公司 | Outdoor heat exchange device and Defrost method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102635969A (en) * | 2012-04-11 | 2012-08-15 | 广东美的制冷设备有限公司 | Air conditioner |
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