CN110986274B - Control method for preventing incomplete defrosting of electric heater, computer readable storage medium and air conditioner - Google Patents

Control method for preventing incomplete defrosting of electric heater, computer readable storage medium and air conditioner Download PDF

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Publication number
CN110986274B
CN110986274B CN201911146319.4A CN201911146319A CN110986274B CN 110986274 B CN110986274 B CN 110986274B CN 201911146319 A CN201911146319 A CN 201911146319A CN 110986274 B CN110986274 B CN 110986274B
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defrosting
air
temperature
delta
unit
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CN110986274A (en
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寇芷薇
罗建飞
周卫华
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • F24F11/41—Defrosting; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/28—Means for preventing liquid refrigerant entering into the compressor

Abstract

The invention provides a control method for preventing incomplete defrosting of an electric heater, a computer readable storage medium and an air conditioner. The temperature difference is used as a judgment condition for entering defrosting and exiting defrosting, so that the time for entering defrosting and exiting defrosting is more accurate, and the problems of excessive fixed telephone and difficult operation of the unit defrosting function are solved; meanwhile, the running time of the unit is detected in real time, the number of times of entering the defrosting condition is met, the unit is compared with the first running parameter of the unit, the unit is made to judge whether defrosting needs to be continued after the unit meets the condition of exiting the defrosting, and the problems that defrosting is incomplete and not clean are solved.

Description

Control method for preventing incomplete defrosting of electric heater, computer readable storage medium and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method for preventing incomplete defrosting of an electric heater, a computer readable storage medium and an air conditioner.
Background
The air conditioning system adopts the electric heater for defrosting, the compressor stops when defrosting, and heat exchange is carried out between the compressor and the frost/ice of the heat exchanger fins and the copper tubes only by the heat productivity of the electric heater, so that the defrosting effect is achieved.
At present, a unit adopting an electric heater defrosting method mainly adopts control and fixed time to realize entering defrosting and exiting defrosting. Setting the accumulated running time of the unit, defrosting after the running time is up, stopping the unit, and starting electric heating; and setting the starting time of electric heating, defrosting after reaching the time, turning off the electric heating, and starting the unit to operate.
When the electric heater is used for defrosting, the compressor of the unit is stopped, the system is not operated, the electric heater is locally heated, and the heat of the electric heater needs to be slowly transferred to other places around, so that the electric heating starting time is short, the frost at the position of the heat exchanger can not be completely defrosted, and the frost is accumulated for a long time in the operation process of the unit, so that the frost of the unit is thicker, the capacity is greatly attenuated, the compressor operates with liquid, the compressor is damaged, and the operation reliability of the unit is reduced; if the electric heater is turned on for a long time, the temperature of the heat exchanger tube at the electric heater and the temperature of the indoor environment may be increased, which is disadvantageous for the air conditioning system and the users.
By adopting the method, the defrosting function of the unit is over-cured, so that the environment humidity is increased or the air opening of the unit is abnormal in the running process of the unit, the frosting of the unit is over-thick, the defrosting time is short, the defrosting is not clean, and the capacity of the unit is greatly attenuated and the environment temperature is increased due to long-time accumulation in the running process of the unit. Although the time for entering into and exiting from defrosting can be set, the operation difficulty of the user is increased, and the time cannot be adjusted at any time according to the environmental temperature.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an intelligent control method for preventing incomplete defrosting of an electric heater, which is characterized in that the air inlet temperature of a unit is monitored in real time through an air inlet temperature sensor, the air outlet temperature of the unit is monitored in real time through an air outlet temperature sensor, the defrosting temperature of the unit is monitored in real time through a defrosting temperature sensor, the air inlet and outlet temperature difference of the unit and the difference value of the air inlet temperature and the defrosting temperature of the unit are recorded in real time through a mainboard, so that whether the unit enters defrosting and exits defrosting is intelligently controlled, and the problems that the defrosting function of the unit is too solidified and the operation is.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method for preventing incomplete defrosting of an electric heater comprises the steps of detecting air inlet temperature, air outlet temperature and defrosting temperature of a unit, calculating a difference value of the air inlet temperature and the air outlet temperature, calculating a difference value of the air inlet temperature and the defrosting temperature, judging whether defrosting is started or stopped according to the two difference values, detecting the defrosting times and running time of the unit and judging whether defrosting is complete. The time for entering and exiting defrosting is more accurate by detecting the relevant temperature data of the unit operation in real time and taking the temperature difference value as the judgment condition for entering and exiting defrosting, so that the problems of over-fixed line of the unit defrosting function and difficult operation are solved; meanwhile, the running time of the unit is detected in real time, the number of times of entering the defrosting condition is met, the unit is compared with the first running parameter of the unit, the unit is made to judge whether defrosting needs to be continued after the unit meets the condition of exiting the defrosting, and the problems that defrosting is incomplete and not clean are solved.
Further, the step of judging whether defrosting is started or not according to the two difference values specifically includes: calculating the temperature T of the inlet airAir intakeAnd defrosting temperature TDefrosting creamDifference Δ T = TAir intake-TDefrosting creamIf delta T is more than delta Tin1, calculating the inlet air temperature TAir intakeAnd the outlet air temperature TAir outletDifference Δ T1= TAir intake-TAir outletAnd if the delta T1 is less than the delta Tin2, judging that the unit needs to enter defrosting, wherein the delta Tin1 and the delta Tin2 are both preset values, and the delta Tin1 is more than the delta Tin 2. The condition that the machine set enters the defrosting mode is judged through the two difference values, the time that the machine set enters the defrosting mode is accurate, and the machine set cannot enter the defrosting mode at the initial frosting stage or the later frosting stage, so that the condition that the defrosting effect is not good is avoided.
Further, the step of judging whether defrosting exits or not according to the two difference values specifically includes: in the defrosting process, the inlet air temperature T is calculatedAir intakeAnd defrosting temperature TDefrosting creamDifference Δ T = TAir intake-TDefrosting creamIf delta T is less than delta Tin3, calculating the inlet air temperature TAir intakeAnd the outlet air temperature TAir outletDifference Δ T1= TAir intake-TAir outletAnd if the delta T1 is larger than the delta Tin4, judging that the unit can quit defrosting, wherein the delta Tin3 and the delta Tin4 are both preset values, and the delta Tin3 is larger than the delta Tin 4. The same condition of judging whether to quit defrosting is achieved through the two difference values, the defrosting can be guaranteed to quit after the defrosting is completed, the defrosting entering and the defrosting quitting are judged through the two difference values, other parameters do not need to be detected excessively, the judgment is accurate, and the judgment is accurateThe efficiency is high.
Further, if Δ T1 is less than Δ Tin2, it is determined that the unit needs to enter defrosting specifically: and detecting the air outlet temperatures of the n air outlets, calculating the difference value between the air inlet temperature and the corresponding air outlet temperature of the n air outlets, comparing the difference value, judging whether the difference value meets (n-1) or n temperature differences are smaller than delta Tin2 at the same time, and judging that the unit needs to enter defrosting if the difference value meets the condition. Because a model machine has a plurality of air outlets, the inhomogeneous condition of wind field probably exists, for example the mounted position, and there is shelter from thing etc. in the environmental space, can guarantee the unit through detecting a plurality of differences and judging and judge that the unit judges accurately, avoids appearing the condition of misjudgement and error protection.
Further, if Δ T1 is greater than Δ Tin4, it is determined that the unit can exit defrosting specifically as follows: and detecting the air outlet temperatures of the n air outlets, calculating the difference value between the air inlet temperature and the corresponding air outlet temperature of the n air outlets, comparing the difference value, judging whether the difference value meets (n-1) or n temperature differences are simultaneously greater than delta Tin4, and judging that the unit can quit defrosting if the difference value meets the condition.
Further, the detecting unit detects the number of times of defrosting and the running time of defrosting and judges whether defrosting is completely specific: detecting the number N of times that the unit enters the defrosting mode, if N is larger than 1 and the defrosting condition is met, detecting the unit running time tn, and if tn is larger than or equal to t1, judging that the unit needs to enter the defrosting mode, wherein t1 is the unit running time when the unit enters the defrosting mode for the first time. The frosting speed of the unit can be detected in real time by detecting the unit running time when the unit enters the defrosting process at each time, so that the humidity of the unit use environment or the unit heat exchange condition at the moment is judged, and the relevant running parameters of the unit are adaptively adjusted, so that the frosting efficiency is reduced.
Further, the detecting unit detects the number of times of defrosting and the running time of defrosting and judges whether defrosting is completely specific: detecting the number N of times that the unit enters defrosting, if N is less than or equal to 1 and meets the condition of entering defrosting, enabling the unit to enter defrosting, and calculating the air inlet temperature T in the defrosting processAir intakeAnd defrosting temperature TDefrosting creamDifference Δ T = TAir intake-TDefrosting creamIf delta T is less than delta Tin3, calculating the inlet air temperature TAir intakeAnd the outlet air temperature TAir outletDifference Δ T1= TAir intake-TAir outletIf the delta T1 is less than or equal to the delta Tin4, the defrosting is not exited until the electric heating is continuously started for ts time, wherein ts is a preset time fixed value. Under severe conditions, such as the environment temperature of about 0 ℃ and the relative humidity of more than 90 percent, the unit can be completely defrosted by prolonging the electric heating starting time, thereby avoiding the condition of frosting or severe icing; in addition, the electric heating is not started for a long time, so that the defrosting is not clean, the ice accumulation phenomenon occurs, and fan blades can be blocked or damaged in severe cases.
Furthermore, in the defrosting process, the air outlet temperatures of the n air outlets are detected, the difference value between the air inlet temperature and the corresponding air outlet temperature of the n air outlets is calculated, the difference value is compared, whether (n-1) is met or n temperature differences are simultaneously larger than delta Tin4 is judged, and if the conditions are not met, the electric heating is continued to be started for ts time, and then the defrosting is stopped.
A computer readable storage medium storing a computer program which, when invoked by a processor, implements the control method of preventing incomplete defrosting of an electric heater as claimed in any one of the preceding claims.
An air conditioner comprising a processor and a memory for storing a computer program which, when invoked by the processor, implements the control method of any preceding claim for preventing incomplete defrosting of an electric heater.
The control method for preventing incomplete defrosting of the electric heater, the computer readable storage medium and the air conditioner have the advantages that: the intelligent control is carried out in the defrosting process of the unit, the unit is adjusted and controlled to enter defrosting or exit defrosting in real time according to the difference between the temperature difference of inlet air and outlet air and the difference between the temperature of inlet air and the temperature of defrosting, so that the defrosting and running of the unit are effectively controlled, the unit can automatically enter defrosting to improve the heat exchange capacity of the unit under the condition of thick frosting in time, the incomplete defrosting of the unit is avoided, and the compressor runs with liquid for a long time to effectively ensure the running reliability of the unit; through carrying out real-time supervision to unit operation time at every turn, and with the unit comparison of operation time for the first time, make the unit can real-time detection the rate of frosting of unit, and then judge the humidity or the unit heat transfer condition of unit service environment this moment, make the unit after satisfying and withdrawing from the condition of defrosting, whether accurate judgement still needs extension to change the frost time, and then effectively guarantee that the unit can change the frost completely, do not have the unclean phenomenon of defrosting, solve the problem that the user used the troublesome poeration simultaneously.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.
Example 1: a control method for preventing incomplete defrosting of an electric heater.
As shown in FIG. 1, a control method for preventing incomplete defrosting of an electric heater comprises the following specific steps:
(1) detecting after the unit is started to operate: real-time detection unit defrosting temperature (heat exchanger tube temperature) T by defrosting thermal bulbDefrosting cream(ii) a Real-time detection of inlet air temperature (ambient temperature) T by environment temperature sensing bulbAir intake(ii) a Real-time detection of air outlet temperature T corresponding to air outlet temperature bulb corresponding to each air outlet of unitAir outlet 1、TAir outlet 2、TAir outlet 3…TOutlet n；
(2) Detecting the air inlet temperature and the defrosting temperature, calculating the difference value of the air inlet temperature and the defrosting temperature and judging, namely TAir intake-TDefrosting creamΔ Tin 1; detecting the air outlet temperature of each air outlet, calculating the difference between the air inlet temperature and the corresponding air outlet temperature of each air outlet, comparing the difference, and judging whether (n-1) is satisfied or n temperature differences are less than delta Tin2 at the same time, namely TAir intake-TAir outlet 1=ΔT1；TAir intake-TAir outlet 2=ΔT2；TAir intake-TAir outlet 3=ΔT3；...TAir intake-TOutlet n= Δ Tn; and Δ T1, Δ T2, ΔT3 … Δ Tn occurs (n-1) or n temperature differences are simultaneously < Δ Tin 2;
(3) if the conditions in the step (2) are met, the unit is defrosted, the compressor and the fan are stopped, and the unit running time t1 is recorded;
(4) if the condition of (2) is not met, continuing to execute (2);
(5) the electric heating is started to operate, the air inlet temperature and the defrosting temperature are detected, and whether the difference value meets T or not is calculated and judgedAir intake-TDefrosting cream< Δ Tin 3; detecting the air outlet temperature of each air outlet, calculating the difference between the air inlet temperature and the corresponding air outlet temperature of each air outlet, comparing the difference, and judging whether (n-1) is satisfied or n temperature differences are simultaneously greater than delta Tin4, namely TAir intake-TAir outlet 1=ΔT1；TAir intake-TAir outlet 2=ΔT2；TAir intake-TAir outlet 3=ΔT3；...TAir intake-TOutlet n= Δ Tn; and Δ T1, Δ T2, Δ T3 … Δ Tn occur (n-1) or n temperature differences are simultaneously > Δ Tin 4;
(6) if the condition of (5) is met, the unit quits defrosting, the electric heater is closed, and the unit is normally started to operate;
(7) if the condition of (5) is not met, continuing to execute (4);
(8) detecting the air inlet temperature and the defrosting temperature when the unit is normally started, calculating the difference value between the air inlet temperature and the defrosting temperature and judging, namely TAir intake-TDefrosting creamΔ Tin 1; detecting the air outlet temperature of each air outlet, calculating the difference between the air inlet temperature and the corresponding air outlet temperature of each air outlet, comparing the difference, and judging whether (n-1) is satisfied or n temperature differences are less than delta Tin2 at the same time, namely TAir intake-TAir outlet 1=ΔT1；TAir intake-TAir outlet 2=ΔT2；TAir intake-TAir outlet 3=ΔT3；...TAir intake-TOutlet n= Δ Tn; and delta T1, delta T2, delta T3 … and delta Tn occur (n-1) or n temperature differences are simultaneously less than delta Tin 2;
(9) if the condition (8) is met, judging whether the number of times = N that the unit enters the defrosting condition is met or not, wherein N is more than 1;
(10) if the condition (9) is met, judging whether the running time tn of the unit is greater than or equal to t1 when the condition for entering defrosting is met, namely, the tn is greater than or equal to t 1;
(11) if the condition of (10) is satisfied, executing (3);
(12) if the condition (9) is not met, the unit enters defrosting, the compressor and the fan are stopped, the electric heater is started to operate, the air inlet temperature and the defrosting temperature are detected, and whether the difference value meets T or not is calculated and judgedAir intake-TDefrosting cream< Δ Tin 3; detecting the air outlet temperature of each air outlet, calculating the difference between the air inlet temperature and the corresponding air outlet temperature of each air outlet, comparing the difference, and judging whether (n-1) is satisfied or n temperature differences are simultaneously greater than delta Tin4, namely TAir intake-TAir outlet 1=ΔT1；TAir intake-TAir outlet 2=ΔT2；TAir intake-TAir outlet 3=ΔT3；...TAir intake-TOutlet n= Δ Tn; and Δ T1, Δ T2, Δ T3 … Δ Tn occur (n-1) or n temperature differences are simultaneously > Δ Tin 4;
(13) if the condition (12) is met, after the electric heating is continuously started for ts time, the defrosting is quitted, and 6 is executed;
(14) if the condition of (12) is not satisfied, the execution continues with (12).
The four parameters of the delta Tin1, the delta Tin2, the delta Tin3 and the delta Tin4 are set in two states and cannot be synchronously compared, and different units have different parameter settings according to requirements, so that the parameters can be compared only in the same state; namely, delta Tin1 is more than delta Tin 2; Δ Tin3 > Δ Tin 4.
The method has the advantages that incomplete/incomplete defrosting of the unit can be effectively prevented, the heat exchange capacity is improved, the liquid-carrying operation of the compressor is prevented, and the operation reliability of the compressor and the unit is improved; the intelligent control of the unit is improved, the operation difficulty of the unit used by a user is reduced, the normal operation of the unit is ensured, the requirements of the user on the use of the air conditioner are met, the after-sale failure rate is reduced, and the after-sale complaints are reduced.
Example 2: a computer readable storage medium.
A computer-readable storage medium for storing a computer program that, when invoked by a processor, implements the control method of embodiment 1 for preventing incomplete defrosting of an electric heater.
Example 3: an air conditioner.
An air conditioner comprising a processor and a memory for storing a computer program that, when invoked by the processor, implements the control method of embodiment 1 for preventing incomplete defrosting of an electric heater.
The above description is only for the preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, and therefore, all equivalent or modifications that do not depart from the spirit of the present invention are intended to fall within the scope of the present invention.

Claims (8)

1. A control method for preventing incomplete defrosting of an electric heater is characterized in that the air inlet temperature, the air outlet temperature and the defrosting temperature of a unit are detected, the difference value of the air inlet temperature and the air outlet temperature is calculated, the difference value of the air inlet temperature and the defrosting temperature is calculated, whether defrosting is carried out or not is judged according to the two difference values, the number of times of defrosting entering the unit and the running time of defrosting are detected, whether defrosting is complete or not is judged,
the detection unit is used for detecting the times of defrosting and the running time of defrosting and judging whether defrosting is completely specified as follows: detecting the defrosting time N of the unit, if N is more than 1 and the defrosting condition is met, detecting the running time tn of the unit, and if tn is more than or equal to t1, judging that the unit needs to enter defrosting, wherein t1 is the running time of the unit when the unit enters the defrosting for the first time; detecting the number N of times that the unit enters defrosting, if N is less than or equal to 1 and meets the condition of entering defrosting, enabling the unit to enter defrosting, and calculating the air inlet temperature T in the defrosting processAir intakeAnd defrosting temperature TDefrosting creamIs equal to TAir intake-TDefrosting creamIf delta T is less than delta Tin3, calculating the inlet air temperature TAir intakeAnd the outlet air temperature TAir outletIs T, T1Air intake-TAir outletIf the delta T1 is less than or equal to the delta Tin4, the defrosting is not exited until the electric heating is continuously started for ts time, wherein ts is a preset time fixed value.
2. The control method for preventing incomplete defrosting of an electric heater as claimed in claim 1, wherein the determining whether defrosting is entered according to the two differences is specifically: calculating the temperature T of the inlet airAir intakeAnd defrosting temperature TDefrosting creamIs equal to TAir intake-TDefrosting creamIf delta T is more than delta Tin1, calculating the inlet air temperature TAir intakeAnd the outlet air temperature TAir outletIs T, T1Air intake-TAir outletAnd if the delta T1 is less than the delta Tin2, judging that the unit needs to enter defrosting, wherein the delta Tin1 and the delta Tin2 are both preset values, and the delta Tin1 is more than the delta Tin 2.
3. The control method for preventing incomplete defrosting of an electric heater as claimed in claim 1, wherein the determining whether to quit defrosting according to the two differences is specifically: in the defrosting process, the inlet air temperature T is calculatedAir intakeAnd defrosting temperature TDefrosting creamIs equal to TAir intake-TDefrosting creamIf delta T is less than delta Tin3, calculating the inlet air temperature TAir intakeAnd the outlet air temperature TAir outletIs T, T1Air intake-TAir outletAnd if the delta T1 is larger than the delta Tin4, judging that the unit can quit defrosting, wherein the delta Tin3 and the delta Tin4 are both preset values, and the delta Tin3 is larger than the delta Tin 4.
4. The control method for preventing incomplete defrosting of the electric heater as claimed in claim 2, wherein if Δ T1 < Δ Tin2, the determining that the unit needs to enter defrosting specifically comprises: and detecting the air outlet temperatures of the n air outlets, calculating the difference value between the air inlet temperature and the corresponding air outlet temperature of the n air outlets, comparing the difference value, judging whether the difference value meets (n-1) or n temperature differences are smaller than delta Tin2 at the same time, and judging that the unit needs to enter defrosting if the difference value meets the condition.
5. The control method for preventing incomplete defrosting of the electric heater as claimed in claim 3, wherein if Δ T1 > Δ Tin4, the determining that the unit can exit defrosting specifically is: and detecting the air outlet temperatures of the n air outlets, calculating the difference value between the air inlet temperature and the corresponding air outlet temperature of the n air outlets, comparing the difference value, judging whether the difference value meets (n-1) or n temperature differences are simultaneously greater than delta Tin4, and judging that the unit can quit defrosting if the difference value meets the condition.
6. The control method for preventing incomplete defrosting of the electric heater as claimed in claim 1, wherein in the defrosting process, the outlet air temperature of n air outlets is detected, the difference between the inlet air temperature and the outlet air temperature corresponding to the n air outlets is calculated, the difference is compared, whether (n-1) is satisfied or n temperature differences are simultaneously greater than delta Tin4 is judged, and if the conditions are not satisfied, the electric heater is continuously turned on for ts time, and then the defrosting is stopped.
7. A computer-readable storage medium for storing a computer program, wherein the computer program, when invoked by a processor, implements the control method of any one of claims 1 to 6 for preventing incomplete defrosting of an electric heater.
8. An air conditioner comprising a processor and a memory for storing a computer program, wherein the computer program when invoked by the processor implements the control method of any one of claims 1 to 6 for preventing incomplete defrosting of an electric heater.
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