CN105910237A - Defrosting control method and device for air conditioner - Google Patents

Defrosting control method and device for air conditioner Download PDF

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Publication number
CN105910237A
CN105910237A CN201610313011.4A CN201610313011A CN105910237A CN 105910237 A CN105910237 A CN 105910237A CN 201610313011 A CN201610313011 A CN 201610313011A CN 105910237 A CN105910237 A CN 105910237A
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CN
China
Prior art keywords
defrosting
air
conditioner
temperature
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610313011.4A
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Chinese (zh)
Inventor
陈华伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea Refrigeration Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Midea Group Co Ltd, Guangdong Midea Refrigeration Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN201610313011.4A priority Critical patent/CN105910237A/en
Publication of CN105910237A publication Critical patent/CN105910237A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02Defrosting cycles
    • F25B47/022Defrosting cycles hot gas defrosting
    • F25B47/025Defrosting cycles hot gas defrosting by reversing the cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41Defrosting; Preventing freezing
    • F24F11/42Defrosting; Preventing freezing of outdoor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41Defrosting; Preventing freezing
    • F24F11/43Defrosting; Preventing freezing of indoor units

Abstract

The invention discloses a defrosting control method for an air conditioner. The defrosting control method comprises the processes that after defrosting is completed by an outdoor heat exchanger each time, the running time of the air conditioner running in a heating mode is obtained; when the running time is longer than the preset time and the temperature of the outdoor heat exchanger is higher than or equal to the preset temperature, a one-way valve is opened so that the air conditioner can be controlled to enter a first defrosting mode to conduct defrosting; and when the running time is longer than the preset time and the temperature of the outdoor heat exchanger is lower than the preset temperature, the air conditioner is controlled to be switched to run in a refrigeration mode so that the air conditioner can enter a second defrosting mode to conduct defrosting. The invention further provides a defrosting control device for the air conditioner. According to the defrosting control method and device for the air conditioner, the defrosting efficiency is improved, and meanwhile, the situation that the comfort of the heat pump air conditioner is seriously affected due to the fact that defrosting is conducted in a refrigeration mode frequently is avoided.

Description

The defrosting control method of air-conditioner and device
Technical field
The present invention relates to air-conditioner technical field, particularly relate to defrosting control method and the dress of a kind of air-conditioner Put.
Background technology
During domestic heat pump air conditioner device heating operation in the winter time, outdoor heat exchanger, as vaporizer, absorbs heat, When outdoor environment temperature is too low or during heating operation overlong time, can cause the refrigerant pipe of outdoor heat exchanger Temperature less than zero degree, the moisture in outdoor air, at outdoor heat exchanger surface condensation Cheng Shuan, even can produce Raw icing phenomenon, after outdoor heat exchanger frosting, the heat transfer resistance between coolant and the air in pipeline can be big Big increase, and then affect the heating effect of whole heat pump air conditioner, cause indoor heating efficiency to decline.
Existing heat pump air conditioner Defrost mode is typically with following two Defrost mode, and a kind of mode is The mode of cross valve commutation, is run by heating mode and is switched to refrigeration mode operation, the discharge of compressor High Temperature High Pressure coolant enters outdoor unit heat exchanger, carries out heat exchange with the frost layer being attached on outdoor unit heat exchanger, And then reach the purpose defrosted, but due to the inverse operating of refrigeration mode, the defrosting every time of off-premises station is required for Gradually can be dropped along with the carrying out of defrosting process from indoor draw heat, indoor temperature by indoor heat exchanger Low, when temperature near relatively low time, air outlet of indoor set blowing cold air can be caused, therefore, at heating operation During, defrosting if running refrigeration mode by switching cross valve continually, can have a strong impact on The comfortableness of heat pump air conditioner;Another way is changed with outdoor for being arranged on exhaust outlet of compressor by unlatching Check valve between hot device entrance, makes the part High Temperature High Pressure coolant of exhaust outlet of compressor enter outdoor heat exchange Device defrosts, but the defrosting efficiency of this mode is low.
Summary of the invention
The present invention provides defrosting control method and the device of a kind of air-conditioner, and its main purpose is that raising removes While frost efficiency, it is to avoid carry out defrosting by row refrigeration mode continually and have a strong impact on heat pump air conditioner Comfortableness.
For achieving the above object, the present invention provides the defrosting control method of a kind of air-conditioner, described air-conditioner Including outdoor heat exchanger and the throttle part that is connected with described outdoor heat exchanger, described air-conditioner also includes Check valve, one end of described check valve is connected to the exhaust outlet of compressor of described air-conditioner, described check valve The other end be connected between described outdoor heat exchanger and described throttle part, described check valve turn on from institute State exhaust outlet of compressor stream between described outdoor heat exchanger, the defrosting control method bag of this air-conditioner Include:
After described outdoor heat exchanger has defrosted every time, obtain what described air-conditioner ran with heating mode Run duration;
When described operation duration more than the temperature of preset duration and outdoor heat exchanger more than or equal to default During temperature, open described check valve, enter the first defrosting mode and defrost controlling air-conditioner;
When described operation duration is preset less than described more than the temperature of preset duration and described outdoor heat exchanger During temperature, control described air-conditioner and switch to refrigeration mode and run, remove entering the second defrosting mode Frost.
Alternatively, described after described outdoor heat exchanger has defrosted every time, obtain described air-conditioner with system Before the step running duration that heat pattern is run, the defrosting control method of described air-conditioner further comprises the steps of:
Described air-conditioner open and with heating mode run after, it is judged that described outdoor heat exchanger the need of Defrosting;
If described outdoor heat exchanger needs defrosting, then control described air-conditioner and switch to refrigeration mode operation, Defrost entering the second defrosting mode.
Alternatively, the step of the operation duration that the described air-conditioner of described acquisition runs with heating mode is with described Open described check valve, enter the first defrosting mode and carry out between the step defrosted controlling air-conditioner, institute The defrosting control method stating air-conditioner further comprises the steps of:
Obtain current outdoor environment temperature;
According to the described outdoor environment temperature got, described preset temperature, wherein, described default temperature are set Degree less than described outdoor environment temperature and is directly proportional to described outdoor environment temperature.
Alternatively, the step of the operation duration that the described air-conditioner of described acquisition runs with heating mode is with described Open described check valve, enter the first defrosting mode and carry out between the step defrosted controlling air-conditioner, institute The defrosting control method stating air-conditioner further comprises the steps of:
Obtain current outdoor environment temperature;
According to the described outdoor environment temperature got, described preset duration is set, wherein, described default time Length is inversely proportional to described outdoor environment temperature.
Alternatively, the described check valve of described unlatching, enter the first defrosting mode and remove controlling air-conditioner Before the step of frost, the defrosting control method of described air-conditioner further comprises the steps of:
When described operation duration reaches the temperature of preset duration and outdoor heat exchanger more than or equal to presetting During temperature, obtain the defrosting number of times of record;
If the described defrosting number of times of record is less than preset times, then perform to open described check valve, to control Air-conditioner enters the step that the first defrosting mode carries out defrosting, and the described defrosting number of times of more new record;
After the step of the described defrosting number of times obtaining record, the defrosting control method of described air-conditioner also wraps Include:
If the described defrosting number of times of record is more than or equal to preset times, then performs to control described air-conditioner and cut Shift to refrigeration mode run, the step defrosted to enter the second defrosting mode to carry out, and by described in record Defrosting number of times resets.
Additionally, for achieving the above object, the present invention also provides for the defrosting of a kind of air-conditioner and controls device, institute State air-conditioner and include outdoor heat exchanger and the throttle part being connected with described outdoor heat exchanger, described air-conditioning Device also includes that check valve, one end of described check valve are connected to the exhaust outlet of compressor of described air-conditioner, institute The other end stating check valve is connected between described outdoor heat exchanger and described throttle part, described check valve Turn on from described exhaust outlet of compressor to the stream between described outdoor heat exchanger, the defrosting control of this air-conditioner Device processed includes:
Acquisition module, for after described outdoor heat exchanger has defrosted every time, obtain described air-conditioner with The operation duration that heating mode runs;
Control module is big for being more than the temperature of preset duration and outdoor heat exchanger when described operation duration In or during equal to preset temperature, open described check valve, enter the first defrosting mode controlling air-conditioner Defrost;
Described control module, is additionally operable to when described operation duration is more than preset duration and described outdoor heat exchange When the temperature of device is less than described preset temperature, controls described air-conditioner and switch to refrigeration mode operation, to enter Enter the second defrosting mode to defrost.
Alternatively, the defrosting control device of described air-conditioner also includes:
Judge module, after opening at described air-conditioner and run with heating mode, it is judged that described outdoor Heat exchanger is the need of defrosting;
Described control module, if being additionally operable to described outdoor heat exchanger to need defrosting, then controls described air-conditioner Switch to refrigeration mode run, defrost entering the second defrosting mode.
Alternatively, described acquisition module, it is additionally operable to when obtaining the operation that air-conditioner runs with heating mode After length, obtain current outdoor environment temperature;
The defrosting of described air-conditioner controls device and also includes:
Parameter setting module, for arranging described preset temperature according to the described outdoor environment temperature got, Wherein, described preset temperature less than described outdoor environment temperature and is directly proportional to described outdoor environment temperature.
Alternatively, described acquisition module, it is additionally operable to be obtained from after outdoor heat exchanger last time defrosted, After air-conditioner runs the operation duration of heating mode, obtain current outdoor environment temperature;
The defrosting of described air-conditioner controls device and also includes:
Parameter setting module, for arranging described preset duration according to the described outdoor environment temperature got, Wherein, described preset duration is inversely proportional to described outdoor environment temperature.
Alternatively, described acquisition module, it is additionally operable to when described operation duration reaches preset duration and outdoor When the temperature of heat exchanger is more than or equal to preset temperature, obtain the defrosting number of times of record;
Described control module, if the described defrosting number of times being additionally operable to record is less than preset times, then opens institute State check valve, enter the first defrosting mode and defrost controlling air-conditioner;
And, if the described defrosting number of times of record is more than or equal to preset times, then control described air-conditioner Switch to refrigeration mode run, defrost entering the second defrosting mode;
The defrosting of described air-conditioner controls device and also includes:
Counting module, for described air-conditioner enter the first defrosting mode defrost time, more new record Described defrosting number of times;And, described air-conditioner enter the second defrosting mode defrost time, will note The described defrosting number of times of record resets.
The defrosting control method of the air-conditioner that the present invention proposes and device, at the air vent of cooler compressor And it is provided with check valve between the outlet of outdoor heat exchanger, obtains after outdoor heat exchanger defrosted sub-last time Running the operation duration of heating mode, length reaches the temperature of preset duration and outdoor heat exchanger relatively when running High and during more than preset temperature, illustrate that now air-conditioner frosting is serious, then by check valve is opened, Now the High Temperature High Pressure coolant of exhaust outlet of compressor enters outdoor heat exchanger is its defrosting, and indoor heat exchanger is still So can be with properly functioning heating mode, for indoor offer heat, the comfortableness of air-conditioner is higher;If fortune Row duration reaches preset duration, but the temperature of outdoor heat exchanger is relatively low and is less than or equal to preset temperature When spending, illustrating that now air-conditioner frosting is serious, air-conditioner switches to refrigeration mode and runs, compressor is arranged It is its defrosting that the High Temperature High Pressure coolant of QI KOU enters outdoor heat exchanger, and this Defrost mode enters outdoor heat exchanger Coolant more, defrosting efficiency is higher, the present invention by using the first defrosting mode when frosting is not serious, Use the second defrosting mode when frosting is serious, not only ensure that overall defrosting efficiency, and it can be avoided that frequency It is switched to refrigeration mode carry out defrosting and affecting the comfortableness of air-conditioner numerously.
Accompanying drawing explanation
Fig. 1 be air-conditioner of the present invention defrosting control method in the structural representation of heat pump air conditioner;
Fig. 2 is the flow chart of the defrosting control method first embodiment of air-conditioner of the present invention;
Fig. 3 is the flow chart of defrosting control method second embodiment of air-conditioner of the present invention;
Fig. 4 is the high-level schematic functional block diagram of the defrosting control device first embodiment of air-conditioner of the present invention;
Fig. 5 is the high-level schematic functional block diagram of defrosting control device second embodiment of air-conditioner of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, do referring to the drawings further Explanation.
Detailed description of the invention
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to limit Determine the present invention.
The present invention provides the defrosting control method of a kind of air-conditioner.
Shown in Fig. 1, for the structural representation of a kind of heat pump air conditioner.This heat pump air conditioner includes pressure Contracting machine 10, cross valve 20, outdoor heat exchanger 30, throttle part 40, indoor heat exchanger 50, wherein, Throttle part 40 can be electric expansion valve.Air-conditioner in heating operations, the air vent of compressor 10 The 11 High Temperature High Pressure coolant discharged, after cross valve 20 commutates, flow into indoor heat exchanger 50, pass through The ducting system of indoor heat exchanger 50 is to the lasting heat of indoor offer, and coolant is from indoor heat exchanger 50 simultaneously In condensed, temperature has declined, then flows into throttle part 40, after throttle part 40 blood pressure lowering Vapour-liquid mixing coolant enters outdoor heat exchanger 30, and coolant evaporates in outdoor heat exchanger 30, low after evaporation Temperature low pressure refrigerant, after cross valve 20 commutates, returns to the gas returning port 12 of compressor 10, so circulates, For the heat that indoor offer is lasting.In the case of outdoor temperature is relatively low in the winter time, due to outdoor heat exchanger 30 As vaporizer, absorb heat, cause the steam in air can be in the surface frosting shape of outdoor heat exchanger 30 Become frost layer.
Further, on the basis of the structure of above-mentioned air-conditioner, in the aerofluxus of the compressor 10 of air-conditioner Arranging check valve 60 between mouth 11 and the outlet of outdoor heat exchanger 30, check valve 60 turns on compressor 10 Air vent 11 and outdoor heat exchanger 30 between pipeline, it is allowed to coolant is from the air vent 11 of compressor 10 Flow to the outlet of outdoor heat exchanger 30.In the exit of outdoor heat exchanger 30, temperature-detecting device 31 is set, The temperature detected by temperature-detecting device is as the outlet temperature of outdoor heat exchanger 30.
In the defrosting control method that the present invention proposes, air-conditioner has two kinds of different defrosting modes: first Defrosting mode and the second defrosting mode.Wherein, during air conditioner heat-production runs, single by opening To valve, control air-conditioner and enter the first defrosting mode operation, after having defrosted, close check valve.Permissible Being understood by, during air-conditioner is properly functioning, check valve is closed.Open check valve After, owing to being provided with throttle part between indoor heat exchanger and outdoor heat exchanger, therefore, check valve institute Pipeline on coolant flow resistance less than indoor heat exchanger and outdoor heat exchanger before pipeline on stream Dynamic resistance, major part High Temperature High Pressure coolant can enter outdoor through check valve from the outlet of outdoor heat exchanger and change Hot device, thus outdoor heat exchanger is played the effect of defrost.During this defrosts, still suffer from Part coolant enters indoor heat exchanger from exhaust outlet of compressor and heats, and therefore, is using the first defrosting When pattern defrosts, do not have the situation that indoor set is blown a cold wind over.And after the first defrosting mode, The temperature of outdoor heat exchanger can rise, then, along with the operation of heating mode, outlet temperature can gradually under Fall.
In the heating process of air-conditioner, by air-conditioner is switched to refrigerating operaton by heating operation, Control air-conditioner and enter the second defrosting mode operation, after having defrosted, then switch back into heating operation.About Concrete control air-conditioner enters the step of the second defrosting mode operation and includes: close compressor, and closes Outdoor fan, switches cross valve, makes the High Temperature High Pressure coolant in compressor flow into outdoor heat exchanger, air-conditioning Device enters refrigerating operaton, now, in order to realize quick defrost, can the aperture of electric expansion valve be regulated To maximum, the operating frequency of compressor is increased so that it is more than work during air conditioner heat-production mode operation Frequency.
With reference to shown in Fig. 2, for the flow chart of the defrosting control method first embodiment of air-conditioner of the present invention.
The defrosting control method of the present embodiment air-conditioner, in the present embodiment, this air-conditioning are proposed based on Fig. 1 The defrosting control method of device includes:
Step S10, after described outdoor heat exchanger has defrosted every time, obtains described air-conditioner to heat mould The operation duration that formula is run.
Heat it should be noted that the defrosting control method of the air-conditioner of the present embodiment proposition is applicable to have The air-conditioner of function, such as heat pump air conditioner.In following example, as a example by heat pump air conditioner, to removing Frost control method illustrates.
About the acquisition of the temperature of outdoor heat exchanger, in one embodiment, can be at the dish of outdoor heat exchanger Temperature-detecting device is set in the middle part of pipe, such as temperature-sensitive bag etc., obtains the temperature conduct that temperature-sensitive bag detects in real time The temperature of outdoor heat exchanger;Or, in another embodiment, respectively at entrance, the middle part of coil pipe, go out Temperature-detecting device is set at Kou, obtains the meansigma methods of the temperature that these temperature-detecting devices detect, make Temperature for outdoor heat exchanger.
Further, about the setting of described preset duration, after step slo, can obtain currently Outdoor environment temperature, according to outdoor environment temperature, preset duration is set as judgment standard, wherein, Described preset duration is inversely proportional to described outdoor environment temperature, when outdoor environment temperature reduces, can increase Preset duration.Such as, when outdoor environment temperature is 1-6 DEG C, preset duration is chosen as 30-60 minute, Being to illustrate as a example by 30 minutes by preset duration below, i.e. air-conditioner is during heating operation, often Once defrosted every 30 minutes.Therefore, after outdoor heat exchanger completes once to defrost, it is run system The operation duration of heat pattern carries out record, when reaching 30 minutes, according to outdoor heat exchanger temperature with default The magnitude relationship of temperature, controls air-conditioner and uses different defrosting modes to defrost.
Step S20, when described operation duration more than preset duration and outdoor heat exchanger temperature more than or During equal to preset temperature, open described check valve, enter the first defrosting mode and remove controlling air-conditioner Frost.
Owing to outdoor environment temperature has certain excursion, therefore, in order to strengthen the accurate of defrosting control Property, after step slo, above-mentioned preset temperature can be pre-set according to current outdoor environment temperature, Outdoor environment temperature is the lowest, and preset temperature is the lowest.After getting operation duration, obtain outdoor environment temperature Degree, the outdoor environment temperature according to getting arranges preset temperature, and wherein, preset temperature is less than outdoor ring Border temperature and being directly proportional to outdoor environment temperature.Such as, it is positioned at the scope of 0~4 DEG C when outdoor environment temperature Time, preset temperature is set to-6 DEG C, and when outdoor environment temperature is positioned at the scope of-5~0 DEG C, preset temperature sets It is set to-12 DEG C etc..Below with preset temperature for-6 DEG C, preset duration is to illustrate as a example by 30 minutes.
Length reaches 30 minutes when running, and when detection outlet temperature is more than or equal to-6 DEG C, opens unidirectional Valve, control air-conditioner enters the first defrosting mode and defrosts.
About exiting the mode of the first defrosting mode, can after running the first defrosting mode certain time length, Such as 30 seconds, close check valve and exit.
Step S30, when described operation duration is less than more than the temperature of preset duration and described outdoor heat exchanger During described preset temperature, control described air-conditioner and switch to refrigeration mode operation, to enter the second defrosting mould Formula defrosts.
Length reaches 30 minutes when running, and when detection outlet temperature is less than or equal to-6 DEG C, illustrates now The frosting situation ratio of outdoor heat exchanger is more serious, air-conditioner switches to refrigeration mode and runs, enter second Defrosting mode defrosts.
Generally, the first defrosting mode can realize the defrosting to outdoor heat exchanger, but works as air-conditioning After the frost is removed, long-play heating mode again, the temperature of its outdoor heat exchanger may be reduced to device Less than preset temperature, illustrate that now frosting ratio is more serious, need to use the second defrosting mode defrosting, use After second defrosting mode defrosting, the temperature of outdoor heat exchanger can be recovered to higher temperature.
The defrosting control method of the air-conditioner that the present embodiment proposes, in air vent and the room of cooler compressor It is provided with check valve between the outlet of external heat exchanger, obtains operation after outdoor heat exchanger defrost sub-last time The operation duration of heating mode, when running the long temperature reaching preset duration and outdoor heat exchanger higher, And during more than preset temperature, illustrate that now air-conditioner frosting is not serious, then by check valve is opened, this Time exhaust outlet of compressor High Temperature High Pressure coolant enter outdoor heat exchanger be its defrosting, indoor heat exchanger is still Can be with properly functioning heating mode, for indoor offer heat, the comfortableness of air-conditioner is higher;If run Duration reaches preset duration, but the temperature of outdoor heat exchanger is relatively low and is less than or equal to preset temperature Time, illustrate that now air-conditioner frosting is serious, air-conditioner is switched to refrigeration mode and runs, compressor air-discharging It is its defrosting that the High Temperature High Pressure coolant of mouth enters outdoor heat exchanger, and this Defrost mode enters outdoor heat exchanger Coolant is more, and defrosting efficiency is higher, the present invention by using the first defrosting mode when frosting is not serious, Use the second defrosting mode when frosting is serious, not only ensure that overall defrosting efficiency, and it can be avoided that frequency It is switched to refrigeration mode carry out defrosting and affecting the comfortableness of air-conditioner numerously.
Second embodiment of the defrosting control method of air-conditioner of the present invention is proposed based on first embodiment.At this In embodiment, before step S10, the defrosting control method of this air-conditioner also includes:
After described air-conditioner is opened and is run heating mode, it is judged that described outdoor heat exchanger is the need of removing Frost;If described outdoor heat exchanger needs defrosting, then control described air-conditioner and switch to refrigeration mode operation, Defrost entering the second defrosting mode.
Due to winter outdoor environment temperature can ratio relatively low, even below zero degree, when air-conditioner is the most long-time When not using, its outdoor heat exchanger is easy to the frosting due to low temperature, therefore, in the present embodiment, After air-conditioner is opened and run heating mode, when outdoor heat exchanger needs to defrost, i.e. open at air-conditioner Qi Hou, detects that outdoor heat exchanger needs to defrost for the first time, controls air-conditioner and switch to refrigeration mode Run, enter the second defrosting mode and defrost.
About judging the air-conditioner mode the need of defrosting, can be that the temperature of outdoor heat exchanger is less than setting During fixed temperature, it is determined that need defrosting, or air-conditioner continuous service heating mode reaches the duration that sets Time, it is determined that need defrosting.
Based on first embodiment or the 3rd of the defrosting control method of the second embodiment proposition air-conditioner of the present invention the Embodiment.With reference to shown in Fig. 3, in the present embodiment, before step S20, the method also includes:
Step S40, when described operation duration reach the temperature of preset duration and outdoor heat exchanger more than or During equal to preset temperature, obtain the defrosting number of times of record;
If the described defrosting number of times of record is less than preset times, then perform step S20;
After step S20, the method also includes:
The described defrosting number of times of step S50, more new record;
If the described defrosting number of times of record is more than or equal to preset times, then perform step S30;
After step S30, the method also includes:
Step S60, resets the described defrosting number of times of record.
During owing to using the first defrosting mode to defrost, still some coolant enters indoor heat exchanger Heating, relative to the second defrosting mode, it is inefficient, therefore, in order to improve defrosting that it defrosts Efficiency, after continuous preset times time runs the first defrosting mode, even if outlet temperature is more than or equal to In the case of preset temperature, still running the second defrosting mode and defrost, wherein preset times can be by User setup, such as 5-8 time.Described defrosting number of times is the number of times running the first defrosting mode continuously, record Defrosting number of times initial value be zero, often run the first defrosting mode, just defrosting number of times added one, wherein, If having run the second defrosting mode, then the defrosting number of times of record is reset, again running the first defrosting mould After formula, restart counting.
The defrosting control method of the air-conditioner that the present embodiment proposes, due to the defrosting efficiency of the first defrosting mode Relatively low relative to the second defrosting mode, after continuous several times uses the first defrosting mode to defrost, control Air-conditioner runs the second defrosting mode and defrosts, and the coolant that this Defrost mode enters outdoor heat exchanger is more, Defrosting efficiency is higher, defrosts more thorough, it is possible to make air-conditioner carry out one after long-play heating mode Secondary defrost thoroughly.
The present invention also proposes the defrosting of a kind of air-conditioner and controls device.With reference to shown in Fig. 4, empty for the present invention The defrosting adjusting device controls the high-level schematic functional block diagram of device first embodiment.
In this embodiment, the defrosting control device of this air-conditioner includes:
Acquisition module 100, for after described outdoor heat exchanger has defrosted every time, obtains described air-conditioner The operation duration run with heating mode.
Heat it should be noted that the defrosting control device of the air-conditioner of the present embodiment proposition is applicable to have The air-conditioner of function, such as heat pump air conditioner.Wherein, defrosting control device can be provided in air-conditioner Internal controller, it is also possible to be independent control terminal, such as, can set up the hands of communication with air-conditioner The mobile terminal such as machine, panel computer, realizes the control to air-conditioner by sending control instruction to air-conditioner, And receive the data that air-conditioner sends.
About the acquisition of the temperature of outdoor heat exchanger, temperature can be set in the middle part of the coil pipe of outdoor heat exchanger Detection device, such as temperature-sensitive bag etc., the temperature that acquisition temperature-sensitive bag detects in real time is as the temperature of outdoor heat exchanger Degree;Or, in another embodiment, respectively temperature inspection is set in the entrance of coil pipe, middle part, exit Survey device, obtain the meansigma methods of the temperature that these temperature-detecting devices detect, as outdoor heat exchanger Temperature.
Further, about the setting of described preset duration, acquisition module 100 is additionally operable to obtaining air-conditioning After the operation duration that device runs with heating mode, obtain current outdoor environment temperature;The present embodiment Control device and also include parameter setting module, for arranging institute according to the described outdoor environment temperature got State preset temperature, wherein, described preset temperature less than described outdoor environment temperature and with described outdoor ring Border temperature is directly proportional.
Obtain current outdoor environment temperature, according to outdoor environment temperature, preset duration is set as judgement Benchmark, wherein, described preset duration is inversely proportional to described outdoor environment temperature, when outdoor environment temperature drops Low, preset duration can be increased.Such as, when outdoor environment temperature is 1-6 DEG C, preset duration is chosen as 30-60 minute, be to illustrate as a example by 30 minutes by preset duration below, and i.e. air-conditioner is at heating operation During, once defrosted every 30 minutes.Therefore, after outdoor heat exchanger completes once to defrost, Its operation duration running heating mode is carried out record, when reaching 30 minutes, according to outdoor heat exchanger Temperature and the magnitude relationship of preset temperature, control air-conditioner and use different defrosting modes to defrost.
Control module 200, for when described operation duration is more than preset duration and the temperature of outdoor heat exchanger During more than or equal to preset temperature, open described check valve, to control air-conditioner entrance the first defrosting mould Formula defrosts.
Owing to outdoor environment temperature has certain excursion, therefore, in order to strengthen the accurate of defrosting control Property, above-mentioned preset temperature can be pre-set according to outdoor environment temperature, outdoor environment temperature is the lowest, in advance If temperature is the lowest.
Parameter setting module, is additionally operable to the described outdoor environment temperature according to getting and arranges described default temperature Degree, wherein, described preset temperature less than described outdoor environment temperature and becomes with described outdoor environment temperature Direct ratio.
Acquisition module 100, after getting operation duration, obtains current outdoor environment temperature, and parameter sets Putting module and arrange preset temperature according to the outdoor environment temperature got, wherein, preset temperature is less than outdoor Ambient temperature and being directly proportional to outdoor environment temperature.Such as, it is positioned at the model of 0~4 DEG C when outdoor environment temperature When enclosing, preset temperature is set to-6 DEG C, when outdoor environment temperature is positioned at the scope of-5~0 DEG C, and preset temperature It is set to-12 DEG C etc..Below with preset temperature for-6 DEG C, preset duration is to illustrate as a example by 30 minutes.
Length reaches 30 minutes when running, and when detection outlet temperature is more than or equal to-6 DEG C, control module 200 open check valve, control air-conditioner enters the first defrosting mode and defrosts.
About exiting the mode of the first defrosting mode, can after running the first defrosting mode certain time length, Such as 30 seconds, close check valve and exit.
Control module 200, is additionally operable to when described operation duration is more than preset duration and described outdoor heat exchanger Temperature less than described preset temperature time, control described air-conditioner switch to refrigeration mode run, with enter Second defrosting mode defrosts.
Length reaches 30 minutes when running, and when detection outlet temperature is less than or equal to-6 DEG C, illustrates now The frosting situation ratio of outdoor heat exchanger is more serious, and air-conditioner is switched to refrigeration mode fortune by control module 200 OK, enter the second defrosting mode to defrost.
Generally, the first defrosting mode can realize the defrosting to outdoor heat exchanger, but works as air-conditioning After the frost is removed, long-play heating mode again, the temperature of its outdoor heat exchanger may be reduced to device Less than preset temperature, illustrate that now frosting ratio is more serious, need to use the second defrosting mode defrosting, use After second defrosting mode defrosting, the temperature of outdoor heat exchanger can be recovered to higher temperature.
The defrosting of the air-conditioner that the present embodiment proposes controls device, in air vent and the room of cooler compressor It is provided with check valve between the outlet of external heat exchanger, obtains operation after outdoor heat exchanger defrost sub-last time The operation duration of heating mode, when running the long temperature reaching preset duration and outdoor heat exchanger higher, And during more than preset temperature, illustrate that now air-conditioner frosting is not serious, then by check valve is opened, this Time exhaust outlet of compressor High Temperature High Pressure coolant enter outdoor heat exchanger be its defrosting, indoor heat exchanger is still Can be with properly functioning heating mode, for indoor offer heat, the comfortableness of air-conditioner is higher;If run Duration reaches preset duration, but the temperature of outdoor heat exchanger is relatively low and is less than or equal to preset temperature Time, illustrate that now air-conditioner frosting is serious, air-conditioner is switched to refrigeration mode and runs, compressor air-discharging It is its defrosting that the High Temperature High Pressure coolant of mouth enters outdoor heat exchanger, and this Defrost mode enters outdoor heat exchanger Coolant is more, and defrosting efficiency is higher, the present invention by using the first defrosting mode when frosting is not serious, Use the second defrosting mode when frosting is serious, not only ensure that overall defrosting efficiency, and it can be avoided that frequency It is switched to refrigeration mode carry out defrosting and affecting the comfortableness of air-conditioner numerously.
Second embodiment of the defrosting control device of air-conditioner of the present invention is proposed based on first embodiment.At this In embodiment, the defrosting of this air-conditioner controls device and also includes:
Judge module, for after described air-conditioner is opened and is run heating mode, it is judged that described outdoor is changed Hot device is the need of defrosting;
Control module 200, if being additionally operable to described outdoor heat exchanger to need defrosting, then controls described air-conditioner and cuts Shift to refrigeration mode run, defrost entering the second defrosting mode.
Due to winter outdoor environment temperature can ratio relatively low, even below zero degree, when air-conditioner is the most long-time When not using, its outdoor heat exchanger is easy to the frosting due to low temperature, therefore, in the present embodiment, After air-conditioner is opened and run heating mode, when outdoor heat exchanger needs to defrost, i.e. open at air-conditioner Qi Hou, it is judged that module detects that outdoor heat exchanger needs to defrost for the first time, and control module 200 controls Air-conditioner switches to refrigeration mode and runs, and enters the second defrosting mode and defrosts.
About judging the air-conditioner mode the need of defrosting, can be that the temperature of outdoor heat exchanger is less than setting During fixed temperature, it is judged that module judges that air-conditioner needs defrosting, or air-conditioner continuous service heating mode When reaching the duration set, it is judged that module judges that air-conditioner needs defrosting.
The defrosting proposing air-conditioner of the present invention based on first embodiment or the second embodiment controls the 3rd of device Embodiment.In the present embodiment, acquisition module 100, be additionally operable to when described operation duration reach preset duration, And the temperature of outdoor heat exchanger more than or equal to preset temperature time, obtain record defrosting number of times;
Control module 200, if the described defrosting number of times being additionally operable to record is less than preset times, then opens described Check valve, enters the first defrosting mode and defrosts controlling air-conditioner;
And, if the described defrosting number of times of record is more than or equal to preset times, then control described air-conditioner Switch to refrigeration mode run, defrost entering the second defrosting mode;
With reference to shown in Fig. 5, the defrosting of air-conditioner controls device and also includes:
Counting module 300, for described air-conditioner enter the first defrosting mode defrost time, update note The described defrosting number of times of record;And, described air-conditioner enter the second defrosting mode defrost time, will The described defrosting number of times of record resets.
During owing to using the first defrosting mode to defrost, still some coolant enters indoor heat exchanger Heating, relative to the second defrosting mode, it is inefficient, therefore, in order to improve defrosting that it defrosts Efficiency, after continuous preset times time runs the first defrosting mode, even if outlet temperature is more than or equal to In the case of preset temperature, still running the second defrosting mode and defrost, wherein preset times can be by User setup, such as 5-8 time.Described defrosting number of times is the number of times running the first defrosting mode continuously, record The initial value of defrosting number of times be zero, often run the first defrosting mode, counting module 300 just will defrosting time Number adds one, and wherein, if having run the second defrosting mode, then counting module 300 is by the defrosting number of times of record Reset, when again running the first defrosting mode, restart counting.
The defrosting of the air-conditioner that the present embodiment proposes controls device, due to the defrosting efficiency of the first defrosting mode Relatively low relative to the second defrosting mode, after continuous several times uses the first defrosting mode to defrost, control Air-conditioner runs the second defrosting mode and defrosts, and the coolant that this Defrost mode enters outdoor heat exchanger is more, Defrosting efficiency is higher, defrosts more thorough, it is possible to make air-conditioner carry out one after long-play heating mode Secondary defrost thoroughly.
These are only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every Utilize equivalent structure or equivalence flow process conversion that description of the invention and accompanying drawing content made, or directly or Connect and be used in other relevant technical fields, be the most in like manner included in the scope of patent protection of the present invention.

Claims (10)

1. a defrosting control method for air-conditioner, described air-conditioner includes outdoor heat exchanger and with described The throttle part that outdoor heat exchanger connects, it is characterised in that described air-conditioner also includes check valve, described One end of check valve is connected to the exhaust outlet of compressor of described air-conditioner, and the other end of described check valve connects Between described outdoor heat exchanger and described throttle part, described check valve turns on from described compressor air-discharging Mouth stream between described outdoor heat exchanger, the defrosting control method of described air-conditioner includes:
After described outdoor heat exchanger has defrosted every time, obtain what described air-conditioner ran with heating mode Run duration;
When described operation duration more than the temperature of preset duration and outdoor heat exchanger more than or equal to default During temperature, open described check valve, enter the first defrosting mode and defrost controlling air-conditioner;
When described operation duration is preset less than described more than the temperature of preset duration and described outdoor heat exchanger During temperature, control described air-conditioner and switch to refrigeration mode and run, remove entering the second defrosting mode Frost.
The defrosting control method of air-conditioner the most according to claim 1, it is characterised in that described After described outdoor heat exchanger has defrosted every time, when obtaining the operation that described air-conditioner runs with heating mode Before long step, the defrosting control method of described air-conditioner further comprises the steps of:
Described air-conditioner open and with heating mode run after, it is judged that described outdoor heat exchanger the need of Defrosting;
If described outdoor heat exchanger needs defrosting, then control described air-conditioner and switch to refrigeration mode operation, Defrost entering the second defrosting mode.
The defrosting control method of air-conditioner the most according to claim 1, it is characterised in that described in obtain Take the step running duration and the described check valve of described unlatching that described air-conditioner runs with heating mode, with Control air-conditioner enters the first defrosting mode and carries out between the step defrosted, and the defrosting of described air-conditioner controls Method further comprises the steps of:
Obtain current outdoor environment temperature;
According to the described outdoor environment temperature got, described preset temperature, wherein, described default temperature are set Degree less than described outdoor environment temperature and is directly proportional to described outdoor environment temperature.
4. according to the defrosting control method of the described air-conditioner of claim 1, it is characterised in that described Obtain the step running duration and the described check valve of described unlatching that described air-conditioner runs with heating mode, Enter the first defrosting mode with control air-conditioner and carry out between the step defrosted, the defrosting control of described air-conditioner Method processed further comprises the steps of:
Obtain current outdoor environment temperature;
According to the described outdoor environment temperature got, described preset duration is set, wherein, described default time Length is inversely proportional to described outdoor environment temperature.
The defrosting control method of air-conditioner the most according to any one of claim 1 to 4, its feature It is, the described check valve of described unlatching, enters the step that the first defrosting mode carries out defrosting controlling air-conditioner Before Zhou, the defrosting control method of described air-conditioner further comprises the steps of:
When described operation duration reaches the temperature of preset duration and outdoor heat exchanger more than or equal to presetting During temperature, obtain the defrosting number of times of record;
If the described defrosting number of times of record is less than preset times, then perform to open described check valve, to control Air-conditioner enters the step that the first defrosting mode carries out defrosting, and the described defrosting number of times of more new record;
After the step of the described defrosting number of times obtaining record, the defrosting control method of described air-conditioner also wraps Include:
If the described defrosting number of times of record is more than or equal to preset times, then performs to control described air-conditioner and cut Shift to refrigeration mode run, the step defrosted to enter the second defrosting mode to carry out, and by described in record Defrosting number of times resets.
6. air-conditioner defrosting control a device, described air-conditioner include outdoor heat exchanger and with institute State the throttle part that outdoor heat exchanger connects, it is characterised in that described air-conditioner also includes check valve, institute The one end stating check valve is connected to the exhaust outlet of compressor of described air-conditioner, and the other end of described check valve is even Being connected between described outdoor heat exchanger and described throttle part, the conducting of described check valve is arranged from described compressor QI KOU stream between described outdoor heat exchanger, the defrosting of described air-conditioner controls device and includes:
Acquisition module, for after described outdoor heat exchanger has defrosted every time, obtain described air-conditioner with The operation duration that heating mode runs;
Control module is big for being more than the temperature of preset duration and outdoor heat exchanger when described operation duration In or during equal to preset temperature, open described check valve, enter the first defrosting mode controlling air-conditioner Defrost;
Described control module, is additionally operable to when described operation duration is more than preset duration and described outdoor heat exchange When the temperature of device is less than described preset temperature, controls described air-conditioner and switch to refrigeration mode operation, to enter Enter the second defrosting mode to defrost.
The defrosting of air-conditioner the most according to claim 6 controls device, it is characterised in that described sky The defrosting adjusting device controls device and also includes:
Judge module, after opening at described air-conditioner and run with heating mode, it is judged that described outdoor Heat exchanger is the need of defrosting;
Described control module, if being additionally operable to described outdoor heat exchanger to need defrosting, then controls described air-conditioner Switch to refrigeration mode run, defrost entering the second defrosting mode.
The defrosting of air-conditioner the most according to claim 6 controls device, it is characterised in that described in obtain Delivery block, is additionally operable to, after obtaining the operation duration that air-conditioner runs with heating mode, obtain current Outdoor environment temperature;
The defrosting of described air-conditioner controls device and also includes:
Parameter setting module, for arranging described preset temperature according to the described outdoor environment temperature got, Wherein, described preset temperature less than described outdoor environment temperature and is directly proportional to described outdoor environment temperature.
The defrosting of air-conditioner the most according to claim 6 controls device, it is characterised in that described in obtain Delivery block, is additionally operable to be obtained from after outdoor heat exchanger last time defrosted, and air-conditioner runs heating mode Operation duration after, obtain current outdoor environment temperature;
The defrosting of described air-conditioner controls device and also includes:
Parameter setting module, for arranging described preset duration according to the described outdoor environment temperature got, Wherein, described preset duration is inversely proportional to described outdoor environment temperature.
10. controlling device according to the defrosting of the air-conditioner according to any one of claim 6 to 9, it is special Levy and be, described acquisition module, it is additionally operable to when described operation duration reaches preset duration and outdoor heat exchange When the temperature of device is more than or equal to preset temperature, obtain the defrosting number of times of record;
Described control module, if the described defrosting number of times being additionally operable to record is less than preset times, then opens institute State check valve, enter the first defrosting mode and defrost controlling air-conditioner;
And, if the described defrosting number of times of record is more than or equal to preset times, then control described air-conditioner Switch to refrigeration mode run, defrost entering the second defrosting mode;
The defrosting of described air-conditioner controls device and also includes:
Counting module, for described air-conditioner enter the first defrosting mode defrost time, more new record Described defrosting number of times;And, described air-conditioner enter the second defrosting mode defrost time, will note The described defrosting number of times of record resets.
CN201610313011.4A 2016-05-11 2016-05-11 Defrosting control method and device for air conditioner Pending CN105910237A (en)

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