CN106765945B - A kind of air conditioner defrosting control method, device and air conditioner - Google Patents
A kind of air conditioner defrosting control method, device and air conditioner Download PDFInfo
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- CN106765945B CN106765945B CN201611180409.1A CN201611180409A CN106765945B CN 106765945 B CN106765945 B CN 106765945B CN 201611180409 A CN201611180409 A CN 201611180409A CN 106765945 B CN106765945 B CN 106765945B
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of air conditioner defrosting control methods, comprising: if needing defrost, switches to defrost pattern from heating mode；Keep four-way valve, indoor fan, the outdoor fan method of operation constant, close compressor opens refrigerant heating device to heat the refrigerant flowed through；After the first preset time of defrost pattern, four-way valve and outdoor fan are closed；After the second preset time of defrost pattern, compressor is opened；After the time of air conditioner operation defrost pattern reaches preset time, refrigerant heating device and compressor are closed, outdoor fan is opened.The invention also discloses a kind of air conditioner defrosting control device and air conditioners.In the present invention, frost layer caused by change is gone because of air conditioner heat-production, adverse consequences caused by avoiding because of frosting, and realize and do not interrupt heating operations in heating operations defrost, improving influences user's comfort.
Description
Technical field
The present invention relates to technical field of air conditioner more particularly to a kind of air conditioner defrosting control methods, device and sky
Adjust device.
Background technique
In winter air-conditioning heating operations, refrigerant is collapsed into the gas of high temperature and pressure by compressor, by evaporator to room
Interior heat supply, temperature is at 0 DEG C or less when refrigerant flows through condenser, it is also necessary to which, from outdoor heat absorption, the moisture that contains in air will be
Condenser surface condensation frosts.
The adverse consequences of air-conditioning frosting has: 1, blocking the channel between fin, increase air flow resistance；2, increase heat exchanger
Thermal resistance, exchange capability of heat decline；3, frequent defrost, defrost not to the utmost, are not only unable to water heating, while also needing to consume original hot water
Energy consumption, the jelly water of discharge recoils into insulated water tank, and water temperature is caused further to decline；4, evaporating temperature declines, Energy Efficiency Ratio drop
It is low, operation of heat pump penalty.
When heating mode defrost at present, indoor evaporator is low temperature, in order to prevent blowing cold air, and indoor wind wheel stops fortune
Row.Therefore, during entire heating, defrost, heating periodic duty, when defrost, can interrupt heating operations, cause indoor environment
Temperature fluctuation influences user's comfort.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Summary of the invention
The main purpose of the present invention is to provide a kind of air conditioner defrosting control methods, it is intended to solve defrost under heating mode
When the problem of interrupting heating operations, causing indoor environment temperature to fluctuate, influence user's comfort.
A kind of air conditioner defrosting control method provided by the invention, comprising:
In heating mode operation, judge whether to need defrost；
If being not required to defrost, current heating mode is kept to run；
If needing defrost, defrost pattern is switched to from heating mode；
Keep four-way valve, indoor fan, the outdoor fan method of operation constant, close compressor opens refrigerant heating device
To heat the refrigerant flowed through；
After the first preset time of defrost pattern, four-way valve and outdoor fan are closed；
After the second preset time of defrost pattern, compressor is opened；
After the time of air conditioner operation defrost pattern reaches preset time, refrigerant heating device and compressor are closed, is opened
Outdoor fan.
Preferably, the time in air conditioner operation defrost pattern is up to after after preset time, comprising:
After opening outdoor fan third preset time, four-way valve and compressor are opened, keeps indoor fan and outdoor wind
Machine is opened.
It is preferably, described after air conditioner operation defrost pattern has reached defrost preset time, further includes:
When condenser temperature is less than the second preset temperature, control air conditioner keeps defrost pattern constant；
When condenser temperature is greater than or equal to the second preset temperature, air conditioner is controlled by defrost pattern and switches to heating mould
Formula.
Preferably, in the heating mode operation, judge whether to need defrost, comprising:
If condenser temperature less than the first preset temperature, judges that defrost need to be carried out；
If condenser temperature is greater than or equal to the first preset temperature, judgement is not required to carry out defrost.
Preferably, if described need defrost, switch current heating mode into defrost pattern, comprising:
After defrost pattern runs the 4th preset time, if refrigerant heating device temperature is lower than third preset temperature, mention
Show current refrigerant heating device error.
In addition, to achieve the above object, the present invention also provides a kind of air conditioner defrosting control devices, comprising:
Judgment module, for judging whether to need defrost in heating mode operation；
Heating module, if keeping current heating mode to run for being not required to defrost；
Switching module, if switching to defrost pattern from heating mode for needing defrost；
Control module, for keeping four-way valve, indoor fan, the outdoor fan method of operation constant, close compressor is opened
Refrigerant heating device is to heat the refrigerant flowed through；
The control module is also used to after the first preset time of defrost pattern, closes four-way valve and outdoor fan；Also use
In after the second preset time of defrost pattern, compressor is opened；It is also used to reach in the time that air conditioner runs defrost pattern default
After time, refrigerant heating device and compressor are closed, opens outdoor fan.
Preferably, the control module is also used to after opening outdoor fan third preset time, opens four-way valve and pressure
Contracting machine keeps indoor fan and outdoor fan to open.
Preferably, further includes:
Confirmation module, for when condenser temperature is less than the second preset temperature, control air conditioner to keep defrost pattern not
Become；It is also used to control air conditioner when condenser temperature is greater than or equal to the second preset temperature by defrost pattern and switch to heating
Mode.
Preferably, the judgment module judges to be changed if being also used to condenser temperature less than the first preset temperature
Frost；If being also used to condenser temperature more than or equal to the first preset temperature, judgement is not required to carry out defrost.
Preferably, further includes:
Cue module is used for after defrost pattern runs the 4th preset time, if condenser temperature is lower than the default temperature of third
Degree then prompts current refrigerant heating device to malfunction.
The present invention also proposes a kind of air conditioner, including air conditioner defrosting control device as described above.
The present invention is by judging whether to need defrost in heating mode operation；If needing defrost, switch current heating mode
Into defrost pattern；Keep four-way valve, indoor fan, the outdoor fan method of operation constant, close compressor opens refrigerant heating
Device is to heat the refrigerant flowed through；After the first preset time of defrost pattern, four-way valve and outdoor fan are closed；Work as defrost pattern
After second preset time, compressor is opened；After the time of air conditioner operation defrost pattern reaches preset time, refrigerant heating is closed
Device and compressor open outdoor fan；In the present invention, frost layer caused by change is gone because of air conditioner heat-production is avoided because frosting is drawn
The adverse consequences risen, and realize and do not interrupt heating operations in heating operations defrost, improve user's comfort.
Detailed description of the invention
Fig. 1 is the flow diagram of the first embodiment of the air condition of that present invention defrosting control method；
Fig. 2 is that air-conditioning system defrosting control of the present invention loads control figure；
Fig. 3 is the flow diagram of the second embodiment of the air condition of that present invention defrosting control method；
Fig. 4 is the flow diagram of the 3rd embodiment of the air condition of that present invention defrosting control method；
Fig. 5 is that refrigerant heater refrigerant flows into and the mode of outflow；
Fig. 6 is the functional block diagram of the first embodiment of the air condition of that present invention defrosting control device；
Fig. 7 is the functional block diagram of the second embodiment of the air condition of that present invention defrosting control device；
Fig. 8 is the functional block diagram of the 3rd embodiment of the air condition of that present invention defrosting control device；
Fig. 9 is the structural schematic diagram of an embodiment of the air condition of that present invention.
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.
Based on the above issues, the present invention provides a kind of air conditioner defrosting control method.
Referring to Fig.1, Fig. 1 is the process signal for the first embodiment that the present invention improves air conditioner heat-production defrost comfort method
Figure.
In one embodiment, which comprises
Step S1, heating mode judge whether to need defrost in running；
When air conditioner operates in heating mode, refrigerant is pressurizeed by compressor, becomes high temperature and high pressure gas, enters the room heat exchange
Device (being at this time evaporator), refrigerant condensation liquefaction heat release becomes liquid refrigerants, while room air being heated, to reach raising
The purpose of room temperature.And liquid refrigerants is depressurized through throttling set, into outdoor heat exchanger (being at this time condenser), refrigerant evaporation
Gasification heat absorption becomes gaseous coolant, while drawing the heat of outdoor air, the moisture after outside air temperature reduction, in air
It condenses and frosts on condenser, influence air conditioner heat-production.Therefore, in a heating mode, need to judge whether to need defrost；Herein
In the case of, it need to judge whether to need defrost according to the temperature of condenser.Alternatively, directly being used by setting air conditioner timing defrost
The frost layer of current air-conditioner condenser to be gone.
Further, in heating mode operation, judge whether to need the defrost include:
If condenser temperature less than the first preset temperature, judges that defrost need to be carried out；
In current air conditioner, the condenser temperature measured, if the temperature, less than the first preset temperature, confirmation is worked as
There is frost layer on preceding air-conditioner condenser, causes accessory when condenser being born a heavy burden and run in order to not influence air conditioner heat-production and its frost layer
Loss, confirmation need to currently run defrost pattern.First preset temperature is the node of air conditioner administrator setting condenser
Low temperature can have frost layer attachment under present node low temperature within the condenser.
If condenser temperature is greater than or equal to the first preset temperature, judgement is not required to carry out defrost.
The condenser temperature measured confirms current condenser if the temperature is greater than or equal to the first preset temperature
Upper unattached frost layer, is currently not required to defrost.
Step S2 keeps current heating mode to run if being not required to defrost；When not needing defrost, control air conditioner is protected
It is constant to hold heating mode, continues to indoor offer heat.
Step S3 switches current heating mode into defrost pattern if needing defrost；
In the operation of current air conditioner heat-production, if there is defrost demand, defrost switching command is submitted；According to switching command, from
Heating mode switches to defrost pattern operation.
Step S4 keeps four-way valve, indoor fan, the outdoor fan method of operation constant, close compressor, opens refrigerant and adds
Thermal is to heat the refrigerant flowed through；
It after air conditioner enters defrost operation, keeps in current air conditioner operation accessory, four-way valve, indoor fan and outdoor wind
Machine operating status is constant, and close compressor, flows out refrigerant when heating operation in compressor all, after this, opens
Refrigerant heating device, to heat the refrigerant that will flow through refrigerant heating device.Wherein, four-way valve is for switching current refrigerant stream
It is flowed to for heating defrost.The heating defrost flow direction, is current four-way valve action, and four-way valve is flowed through by switching refrigerant
Entrance and outlet change refrigerant in air conditioner and flow through direction, corresponding current operating modes of air conditioner.In current heating defrost pattern
Flow direction, it is contrary with being flowed under heating mode, can specifically check in Fig. 9 heating defrost flow direction.
Step S5 closes four-way valve and outdoor fan after the first preset time of defrost pattern；
After defrost pattern runs the first preset time, four-way valve completes refrigerant and flows through road switching, closes four-way valve and room
Outer blower, from the high temperature and pressure refrigerant flowed out in compressor, heat release is liquefied after heating defrost flow direction flows into condenser, makes to condense
Device temperature increases, the defrosting operation for condenser attachment frost layer.Temperature reduces after refrigerant heat release, and it is logical to flow through direction via defrost
It crosses throttling set and flows into refrigerant heating device, the refrigerant that refrigerant heating devices heat flows through flows into evaporator, by making after heat release
Temperature increases in evaporator, blows out via indoor fan, has reached defrost heating effect, prevents blowing cold air shadow in defrost operation
Ring fluctuations in indoor temperature.
Step S6 opens compressor after the second preset time of defrost pattern；
After defrost pattern runs the second preset time, compressor is opened, four will be passed through by the refrigerant after evaporator heat release
Port valve flows into compressor and compresses to refrigerant to heat defrost flow direction, and compressed refrigerant flows into cold through heating defrost flow direction
Condenser heat release makes condenser temperature raisingization go frost layer appended by condenser；Exothermic refrigerant flow through flow into after throttling set it is cold
Matchmaker's heating device, refrigerant heating device flow into evaporator heat release after heating to the refrigerant of inflow, evaporator temperature are made after heat release
Degree increases, and blows out hot wind via indoor fan.
Wherein, which is greater than the second preset time；
Since under heating mode, the temperature of condenser is very low, outdoor fan continuous service Accelerating Removal cold air, and defrost
The temperature of condenser increases under mode, melts to reduce the Diffusive shock acceleration frost of heat, defrost pattern in one embodiment of the invention
Lower outdoor fan is out of service.Since when refrigerant heating device has just started operation, the temperature of condenser is still lower, can control
Outdoor fan continues to run a period of time, and Accelerating Removal cold air turns off outdoor fan when the temperature of condenser increases.
It, when air conditioner is in defrost pattern up to the second preset time (for example, 30 seconds), can be closed by the way that the second preset time is arranged
Outdoor fan；When can also be closed according to blower outside the temperature-controlled chamber of condenser.
Step S7 closes refrigerant heating device and compression after the time of air conditioner operation defrost pattern reaches preset time
Machine opens outdoor fan.
In defrost pattern operation, after runing time reaches preset time, defrost pattern operation is finished, and closes refrigerant heating device
And compressor, it opens outdoor fan and blows out condenser high temperature that may be present so that condenser cools down, and closes refrigerant heating
Device cooling.The defrost pattern operation finishes, and defrosting operation is completed in expression, is not required to after continuing defrost operation, stops defrost
Operation；Alternatively, defrost operation duration, which is arranged, for current defrost pattern has terminated, stop defrost pattern operation.
After the time in air conditioner operation defrost pattern reaches after preset time, further includes:
After opening outdoor fan third preset time, four-way valve and compressor are opened, keeps indoor fan and outdoor wind
Machine is opened.
After air conditioner stops defrost pattern operation, compressor and outdoor fan close third preset time, to switch to
Former heating mode operation opens compressor, four-way valve and outdoor fan, four-way Vavle switching after the unlatching heating mode operation
Refrigerant flow direction is heating flow direction, is run by original heating mode.Former heating mode operation is switched to after the third preset time,
It is to avoid being directly switch into former heated mould after related accessory operation under defrost pattern for the buffer time in later period under defrost pattern
When formula is run, caused accessory loss.
Under defrost, the control logic of air-conditioning all parts is referring to Fig. 2, in one embodiment, the control according to fig. 2
Logic chart controls the working condition of compressor, four-way valve, indoor fan, outdoor fan and refrigerant heating device under defrost pattern,
T1 indicates preset time in Fig. 2；T2 indicates the first preset time；T3 indicates the second preset time, for example, setting preset time is
8 minutes, the first preset time be 30 seconds, T3 be 10 seconds etc., certain user can also by remote control equipment or other controllably set up
Standby modification preset time and the first preset time indicate current defrost mould when air conditioner, which is in the defrost time, reaches preset time
Formula terminates, heating mode is opened, at this point, not needing to heat to by the refrigerant for flowing into evaporator, then closes refrigerant heating dress
It sets, evaporator temperature increases, and hot-air is discharged by opening outdoor fan, and control air conditioner by the corresponding parameter of heating mode
Operation.
In the defrost pattern operation of the present embodiment in a heating mode, by opening refrigerant heating device and indoor fan,
It is heated using refrigerant heater to refrigerant, delivery air is heated by heat exchange, after realizing laser heating, prevents air conditioner from changing
After terminating heating during frost, the problem of users'comfort caused by the fluctuation of caused indoor environment temperature reduces.
It is the flow diagram of the second embodiment of the air condition of that present invention defrosting control method referring to Fig. 3, Fig. 3.Based on upper
The first embodiment of method is stated, it is described after air conditioner operation defrost pattern has reached defrost preset time, further includes:
Step S8, when condenser temperature is less than the second preset temperature, control air conditioner keeps defrost pattern constant；
It heats in defrost operation, after reaching preset time to defrost runing time, measures condenser temperature, if current condensation
When device temperature is less than the second preset temperature, confirm that frost layer has not been changed on current condenser, still exists, it is contemplated that later period switching
The problem of influencing air conditioner heat-production after heating mode, or accessory is caused to be lost, controls current air conditioner and still runs defrost mould
Formula, continuation go appended frost layer on condenser.
Step S9, when condenser temperature is greater than or equal to the second preset temperature, control air conditioner is switched by defrost pattern
To heating mode.
If the condenser temperature measured is greater than or equal to the second preset temperature, appended frost layer is changed on current condenser
It goes；Alternatively, frost layer cannot influence the operation of later period air conditioner heat-production more than institute on condenser；Still transported according to current air conditioner mode
Row is run under switching heating mode.Wherein, it is contemplated that the purpose reached needed for defrost pattern operation, the described second default temperature
Degree is greater than preset first temperature.
It is the flow diagram of the 3rd embodiment of the air condition of that present invention defrosting control method referring to Fig. 4, Fig. 4.Based on upper
State the first and second embodiment of method, further includes:
Step S10, after defrost pattern runs the 4th preset time, if refrigerant heating device temperature is lower than the default temperature of third
Degree then prompts current refrigerant heating device to malfunction.
Defrost pattern operation in, measure refrigerant heating device heating tube temperature, to default third temperature comparisons,
Confirm current refrigerant heating device whether normal operation, i.e., whether be flow through refrigerant heating；The temperature measurement equipment, to work as
Preceding air conditioner has temperature-measuring module；The default third temperature is arranged, refrigerant heating device for air conditioner relevant supervisor
The minimum temperature alarm of heating tube.Under the minimum temperature alarm, current refrigerant heating device run-time error is indicated.Wherein, pass through
The refrigerant that refrigerant heating devices heat flows through please check Fig. 5.
The present invention further provides a kind of air conditioner defrosting control devices.
It is the functional block diagram of the first embodiment of the air condition of that present invention defrosting control device referring to Fig. 6, Fig. 6.
In one embodiment, described device includes: judgment module 10, heating module 20, switching module 30, control module
40。
Judgment module 10, for judging whether to need defrost in heating mode operation；
When air conditioner operates in heating mode, refrigerant is pressurizeed by compressor, becomes high temperature and high pressure gas, enters the room heat exchange
Device (being at this time evaporator), refrigerant condensation liquefaction heat release becomes liquid refrigerants, while room air being heated, to reach raising
The purpose of room temperature.And liquid refrigerants is depressurized through throttling set, into outdoor heat exchanger (being at this time condenser), refrigerant evaporation
Gasification heat absorption becomes gaseous coolant, while drawing the heat of outdoor air, the moisture after outside air temperature reduction, in air
It condenses and frosts on condenser, influence air conditioner heat-production.Therefore, in a heating mode, need to judge whether to need defrost；Herein
In the case of, it need to judge whether to need defrost according to the temperature of condenser.Alternatively, directly being used by setting air conditioner timing defrost
The frost layer of current air-conditioner condenser to be gone.
Further, in heating mode operation, judge whether to need the defrost include:
The judgment module 10 if being also used to condenser temperature less than the first preset temperature judges that defrost need to be carried out；
In current air conditioner, the condenser temperature measured, if the temperature, less than the first preset temperature, confirmation is worked as
There is frost layer on preceding air-conditioner condenser, causes accessory when condenser being born a heavy burden and run in order to not influence air conditioner heat-production and its frost layer
Loss, confirmation need to currently run defrost pattern.First preset temperature is the node of air conditioner administrator setting condenser
Low temperature can have frost layer attachment under present node low temperature within the condenser.
The judgment module 10, if being also used to condenser temperature more than or equal to the first preset temperature, judgement is not required to carry out
Defrost.
The condenser temperature measured confirms current condenser if the temperature is greater than or equal to the first preset temperature
Upper unattached frost layer, is currently not required to defrost.
The heating module 20, if keeping current heating mode to run for being not required to defrost；When not needing defrost,
Controlling air conditioner keeps heating mode constant, continues to indoor offer heat.
The switching module 30, if switching current heating mode into defrost pattern for needing defrost；Referred to according to switching
It enables, switches to defrost pattern operation from heating mode.
Control module 40, for keeping four-way valve, indoor fan, the outdoor fan method of operation constant, close compressor is opened
Refrigerant heating device is opened to heat the refrigerant flowed through；
It after air conditioner enters defrost operation, keeps in current air conditioner operation accessory, four-way valve, indoor fan and outdoor wind
Machine operating status is constant, and close compressor, flows out refrigerant when heating operation in compressor all, after this, opens
Refrigerant heating device, to heat the refrigerant that will flow through refrigerant heating device.Wherein, four-way valve is for switching current refrigerant stream
It is flowed to for heating defrost.The heating defrost flow direction, is current four-way valve action, and four-way valve is flowed through by switching refrigerant
Entrance and outlet change refrigerant in air conditioner and flow through direction, corresponding current operating modes of air conditioner.In current heating defrost pattern
Flow direction, it is contrary with being flowed under heating mode, can specifically check in Fig. 9 heating defrost flow direction.
The control module 40 is also used to after the first preset time of defrost pattern, closes four-way valve and outdoor fan；
After defrost pattern runs the first preset time, four-way valve completes refrigerant and flows through road switching, closes four-way valve and room
Outer blower, from the high temperature and pressure refrigerant flowed out in compressor, heat release is liquefied after heating defrost flow direction flows into condenser, makes to condense
Device temperature increases, the defrosting operation for condenser attachment frost layer.Temperature reduces after refrigerant heat release, and it is logical to flow through direction via defrost
It crosses throttling set and flows into refrigerant heating device, the refrigerant that refrigerant heating devices heat flows through flows into evaporator, by making after heat release
Temperature increases in evaporator, blows out via indoor fan, has reached defrost heating effect, prevents blowing cold air shadow in defrost operation
Ring fluctuations in indoor temperature.
The control module 40 is also used to after the second preset time of defrost pattern, opens compressor；
After defrost pattern runs the second preset time, compressor is opened, four will be passed through by the refrigerant after evaporator heat release
Port valve flows into compressor and compresses to refrigerant to heat defrost flow direction, and compressed refrigerant flows into cold through heating defrost flow direction
Condenser heat release makes condenser temperature raisingization go frost layer appended by condenser；Exothermic refrigerant flow through flow into after throttling set it is cold
Matchmaker's heating device, refrigerant heating device flow into evaporator heat release after heating to the refrigerant of inflow, evaporator temperature are made after heat release
Degree increases, and blows out hot wind via indoor fan.
Wherein, which is greater than the second preset time；
Since under heating mode, the temperature of condenser is very low, outdoor fan continuous service Accelerating Removal cold air, and defrost
The temperature of condenser increases under mode, melts to reduce the Diffusive shock acceleration frost of heat, defrost pattern in one embodiment of the invention
Lower outdoor fan is out of service.Since when refrigerant heating device has just started operation, the temperature of condenser is still lower, can control
Outdoor fan continues to run a period of time, and Accelerating Removal cold air turns off outdoor fan when the temperature of condenser increases.
It, when air conditioner is in defrost pattern up to the second preset time (for example, 30 seconds), can be closed by the way that the second preset time is arranged
Outdoor fan；When can also be closed according to blower outside the temperature-controlled chamber of condenser.
The control module 40 is also used to after the time that air conditioner runs defrost pattern reaches preset time, closes refrigerant
Heating device and compressor open outdoor fan.
In defrost pattern operation, after runing time reaches preset time, defrost pattern operation is finished, and closes refrigerant heating device
And compressor, it opens outdoor fan and blows out condenser high temperature that may be present so that condenser cools down, and closes refrigerant heating
Device cooling.The defrost pattern operation finishes, and defrosting operation is completed in expression, is not required to after continuing defrost operation, stops defrost
Operation；Alternatively, defrost operation duration, which is arranged, for current defrost pattern has terminated, stop defrost pattern operation.
Further, described when air conditioner operation defrost pattern has reached defrost preset time, close refrigerant heating device and
Compressor, open outdoor fan after, comprising:
The control module 40 is also used to after opening outdoor fan third preset time, opens four-way valve and compressor,
Indoor fan and outdoor fan is kept to open.
After air conditioner stops defrost pattern operation, compressor and outdoor fan close third preset time, to switch to
Former heating mode operation opens compressor, four-way valve and outdoor fan, four-way Vavle switching after the unlatching heating mode operation
Refrigerant flow direction is heating flow direction, is run by original heating mode.Former heating mode operation is switched to after the third preset time,
It is to avoid being directly switch into former heated mould after related accessory operation under defrost pattern for the buffer time in later period under defrost pattern
When formula is run, caused accessory loss.
In the defrost pattern operation of the present embodiment in a heating mode, by opening refrigerant heating device and indoor fan,
It is heated using refrigerant heater to refrigerant, delivery air is heated by heat exchange, after realizing laser heating, prevents air conditioner from changing
After terminating heating during frost, the problem of users'comfort caused by the fluctuation of caused indoor environment temperature reduces.
It is the functional block diagram of the second embodiment of the air condition of that present invention defrosting control device referring to Fig. 7, Fig. 7.Institute
State device further include: confirmation module 50.
Confirmation module 50, for when condenser temperature is less than the second preset temperature, control air conditioner to keep defrost pattern
It is constant；
It heats in defrost operation, after reaching preset time to defrost runing time, measures condenser temperature, if current condensation
When device temperature is less than the second preset temperature, confirm that frost layer has not been changed on current condenser, still exists, it is contemplated that later period switching
The problem of influencing air conditioner heat-production after heating mode, or accessory is caused to be lost, controls current air conditioner and still runs defrost mould
Formula, continuation go appended frost layer on condenser.
The confirmation module 50 is also used to control air conditioner when condenser temperature is greater than or equal to the second preset temperature
Heating mode is switched to by defrost pattern.
If the condenser temperature measured is greater than or equal to the second preset temperature, appended frost layer is changed on current condenser
It goes；Alternatively, frost layer cannot influence the operation of later period air conditioner heat-production more than institute on condenser；Still transported according to current air conditioner mode
Row is run under switching heating mode.Wherein, it is contemplated that the purpose reached needed for defrost pattern operation, the described second default temperature
Degree is greater than preset first temperature.
It is the functional block diagram of the 3rd embodiment of the air condition of that present invention defrosting control device referring to Fig. 8, Fig. 8.Institute
State device further include: cue module 60.
Cue module 60, for after defrost pattern runs the 4th preset time, if refrigerant heating device temperature is lower than the
Three preset temperatures then prompt current refrigerant heating device to malfunction；
Defrost pattern operation in, measure refrigerant heating device heating tube temperature, to default third temperature comparisons,
Confirm current refrigerant heating device whether normal operation, i.e., whether be flow through refrigerant heating；The temperature measurement equipment, to work as
Preceding air conditioner has temperature-measuring module；The default third temperature is arranged, refrigerant heating device for air conditioner relevant supervisor
The minimum temperature alarm of heating tube.Under the minimum temperature alarm, indicates current refrigerant heating device run-time error, cannot normally transport
The refrigerant heating that behavior flows through.Wherein, the refrigerant flowed through by refrigerant heating devices heat please check Fig. 5.
The present invention also proposes a kind of air conditioner, which includes above-mentioned defrosting control device, the defrosting control device
Specific structure at least has referring to above-described embodiment since this air-conditioning uses whole technical solutions of above-mentioned all embodiments
There is beneficial effect brought by the technical solution of above-described embodiment, details are not described herein.
It is the preferred structure schematic diagram of the air condition of that present invention referring to Fig. 9, Fig. 9；Be installed on throttling set 4 and evaporator 5 it
Between refrigerant heating device be thick-film heating pipe.The thick-film heating pipe includes clearance and the thick-film heating for being laid in copper pipe outer
Silk.
In order to improve the utilization rate of coolant transmission thermal energy, refrigerant heating device 8 is installed on throttling set 4 and evaporator 5
Between, when heating mode is switched under defrost pattern, four-way valve 7 changes refrigerant flow direction, and tubular wine wheel 6 is (indoor in opening chamber
Blower).
Wherein, air-conditioning heating defrost flows through process, is refrigerant after compressor (1) compression, by four-way valve (7) by heating
Defrost traffic organising flows to condenser (2), after throttling set (4), refrigerant heating device (8), liquid flow direction evaporation
Device (5) flows back to compressor (1) using four-way valve (7).The refrigerant that heating device (8) heating flows into evaporator (5) is realized indoor
Heating.
Manufacture thick film heater is using thick film screen typography, and printing insulation is situated between on the substrate of stainless steel or ceramics
The materials such as matter, adding thermal resistance, conductor, glass protection glaze, pass through Novel heating device made of high temperature sintering.The heating of the type
Device has the following characteristics that 1, using thick film printing technique, technical maturity, reliable；2, new material is suitble to be printed on stainless steel
On plate, reliable performance is stablized；3, flexible design, directlys adopt stainless steel plate, shape size can depending on different designs,
Power requirement can achieve 3000W or more, power density 100W/cm2；4, temperature rises fast, low heat capacity, temperature when heating
It rises and falls small；5, energy-efficient, 70-95% can reach according to different mode (directly heat or indirect heating) Energy Efficiency Ratio.This hair
The refrigerant heating device of a bright embodiment is thick-film heating pipe, and the thick-film heating pipe includes copper pipe and is laid in copper pipe outer
Thick-film heating silk, thick-film heating pipe are serially connected between condenser and evaporator, as a part of coolant loop, are opened and closed
Heating function does not affect the circulation of refrigerant, and certainly, high temperature booster when heating in order to prevent, the copper pipe in thick-film heating pipe is than normal
The thickness of copper pipe in the coolant loop of rule.Using thick-film heating pipe as refrigerant heating device, and the temperature of thick-film heating pipe and
Power is controllably easily adjusted, and can greatly improve the heating effect under defrost pattern to refrigerant, achievees the purpose that quick defrost.
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 (11)
1. a kind of air conditioner defrosting control method, which is characterized in that the described method comprises the following steps:
In heating mode operation, judge whether to need defrost；
If being not required to defrost, current heating mode is kept to run；
If needing defrost, defrost pattern is switched to from heating mode；
Keep four-way valve, indoor fan, the outdoor fan method of operation constant, close compressor opens refrigerant heating device to add
The refrigerant of hot-fluid warp；
After the first preset time of defrost pattern, four-way valve and outdoor fan are closed；
After the second preset time of defrost pattern, compressor is opened, refrigerant heater heats the refrigerant flowed through, evaporator is flowed into,
By increasing evaporator temperature after heat release, is blown out via indoor fan, reach defrost heating effect；
In the time of air conditioner operation defrost pattern up to after preset time, closing refrigerant heating device and compressor, outside opening chamber
Blower.
2. air conditioner defrosting control method as described in claim 1, which is characterized in that described to run defrost pattern in air conditioner
After time reaches after preset time, comprising:
After opening outdoor fan third preset time, four-way valve and compressor are opened, indoor fan and outdoor fan is kept to open
It opens.
3. air conditioner defrosting control method as described in claim 1, which is characterized in that described when air conditioner has run defrost pattern
Up to after defrost preset time, further includes:
When condenser temperature is less than the second preset temperature, control air conditioner keeps defrost pattern constant；
When condenser temperature is greater than or equal to the second preset temperature, air conditioner is controlled by defrost pattern and switches to heating mode.
4. air conditioner defrosting control method as described in claim 1, which is characterized in that described to judge whether to need defrost, comprising:
If condenser temperature less than the first preset temperature, judges that defrost need to be carried out；
If condenser temperature is greater than or equal to the first preset temperature, judgement is not required to carry out defrost.
5. the air conditioner defrosting control method as described in any one of Claims 1-4, which is characterized in that if described need defrost, cut
It changes after current heating mode to defrost pattern, further includes:
After defrost pattern runs the 4th preset time, if refrigerant heating device temperature is lower than third preset temperature, prompt to work as
Preceding refrigerant heating device error.
6. a kind of air conditioner defrosting control device characterized by comprising
Judgment module, for judging whether to need defrost in heating mode operation；
Heating module, if keeping current heating mode to run for being not required to defrost；
Switching module, if switching to defrost pattern from heating mode for needing defrost；
Control module, for keeping four-way valve, indoor fan, the outdoor fan method of operation constant, close compressor opens refrigerant
Heating device is to heat the refrigerant flowed through；
The control module is also used to after the first preset time of defrost pattern, closes four-way valve and outdoor fan；It is also used to work as
After the second preset time of defrost pattern, compressor is opened, refrigerant heater heats the refrigerant flowed through, evaporator is flowed into, by putting
After heat evaporator temperature is increased, blown out via indoor fan, reaches defrost heating effect；It is also used in air conditioner running pipeline
After the time of white mode reaches preset time, refrigerant heating device and compressor are closed, opens outdoor fan.
7. air conditioner defrosting control device as claimed in claim 6, which is characterized in that the control module is also used to opening
After outdoor fan third preset time, four-way valve and compressor are opened, indoor fan and outdoor fan is kept to open.
8. air conditioner defrosting control device as claimed in claim 6, which is characterized in that further include:
Confirmation module, for when condenser temperature is less than the second preset temperature, control air conditioner to keep defrost pattern constant；Also
For controlling air conditioner by defrost pattern and switching to heating mode when condenser temperature is greater than or equal to the second preset temperature.
9. air conditioner defrosting control device as claimed in claim 6, which is characterized in that the judgment module, if being also used to condense
Device temperature less than the first preset temperature judges that defrost need to be carried out；If being also used to condenser temperature more than or equal to the first default temperature
Degree, judgement are not required to carry out defrost.
10. the air conditioner defrosting control device as described in any one of claim 6 to 9, which is characterized in that further include:
Cue module is used for after defrost pattern runs the 4th preset time, if condenser temperature is lower than third preset temperature,
Current refrigerant heating device is prompted to malfunction.
11. a kind of air conditioner, which is characterized in that including the described in any item air conditioner defrosting control dresses of such as claim 6-10
It sets.
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| CN109186165A (en) * | 2018-10-10 | 2019-01-11 | 株洲利德英可电子科技有限公司 | A kind of evaporator thawing apparatus |
| CN110469962B (en) * | 2019-07-24 | 2022-12-20 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN110469961B (en) * | 2019-07-24 | 2022-09-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN110469960B (en) * | 2019-07-24 | 2022-09-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
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