CN111237984A - Air conditioner defrosting control method and device, air conditioner and computer readable storage medium - Google Patents
Air conditioner defrosting control method and device, air conditioner and computer readable storage medium Download PDFInfo
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- CN111237984A CN111237984A CN202010053990.0A CN202010053990A CN111237984A CN 111237984 A CN111237984 A CN 111237984A CN 202010053990 A CN202010053990 A CN 202010053990A CN 111237984 A CN111237984 A CN 111237984A
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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
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- 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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F11/70—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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/70—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
- F24F11/873—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling refrigerant heaters
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Physics & Mathematics (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner defrosting control method, an air conditioner defrosting control device, an air conditioner and a computer readable storage medium, wherein the defrosting control method comprises the following steps: when the air conditioner receives a defrosting signal, the four-way valve is controlled to change the direction; starting the electric auxiliary heating equipment, and continuously detecting the current set temperature Ts and the current inner ring temperature Tin of the air conditioner; the inner motor is reversely rotated and operates according to the initial rotating speed N; and adjusting the rotating speed of the inner motor according to the detected set temperature and the detected inner ring temperature. The invention can accelerate defrosting, keep indoor temperature stable and improve user experience.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner defrosting control method and device, an air conditioner and a computer readable storage medium.
Background
With the improvement of the standard of living of people, the air conditioner becomes an essential household appliance for every family. After the air conditioner continuously heats and operates for a period of time, the outdoor heat exchanger frosts, the frost layer can prevent heat transfer, the heating performance of the air conditioner can be reduced, and the using effect is affected.
The existing defrosting mode is mainly realized by reversing through a four-way valve, a heating mode is switched into a cooling mode, indoor heat and heat remained in a compressor are absorbed in the flowing process of a refrigerant, and an outdoor heat exchanger is used as a condenser to release heat so as to melt a frost layer. In order to prevent cold air from blowing indoors, when defrosting, the fan of the indoor unit stops rotating, so that the heat exchange effect of the heat exchanger (evaporator) of the indoor unit is poor, the defrosting speed is low, and the defrosting time is longer as the frost layer is thicker; when defrosting, the air conditioner stops heating and brings indoor heat to the outdoor, and the longer defrosting time leads to longer non-heating time and poor user experience.
Disclosure of Invention
The invention solves the problems that the existing air conditioner has low defrosting speed, and the longer defrosting time causes no heating effect for a longer time indoors, and the user experience is poor.
In order to solve the above problems, the invention provides an air conditioner defrosting control method, an air conditioner defrosting control device, an air conditioner and a computer readable storage medium, which can accelerate the rate of heat absorption of a refrigerant during defrosting, improve the defrosting speed, enable the air conditioner to be switched into a heating mode as soon as possible, and improve user experience.
The technical scheme adopted by the invention is as follows:
according to an aspect of the present invention, there is provided a defrosting control method including the steps of:
when the air conditioner receives a defrosting signal, the four-way valve is controlled to change the direction;
starting the electric auxiliary heating equipment, and continuously detecting the current set temperature Ts and the current inner ring temperature Tin of the air conditioner;
the inner motor is reversely rotated and operates according to the initial rotating speed N;
and adjusting the rotating speed of the inner motor according to the detected set temperature and the detected inner ring temperature.
By the control method, defrosting of the air conditioner can be controlled, defrosting of the outdoor heat exchanger is accelerated by turning on the electric auxiliary heating equipment, reversing the inner motor and adjusting the rotating speed of the inner motor, defrosting time is shortened, indoor heat loss during defrosting is reduced, and indoor temperature is kept stable; and the inner fan rotates reversely to make the indoor air flow reversely, the hot air at the top of the room descends, and the indoor temperature can be still kept. In addition, when defrosting is carried out, the temperature inside the indoor unit is kept stable by starting the electric auxiliary heating equipment, and abnormal sound caused by expansion with heat and contraction with cold of the plastic parts of the indoor unit is avoided.
In some embodiments of the present invention, when the speed of the internal motor is adjusted,
calculating an inner ring temperature difference delta Tin between the current time and the inner ring temperature at the previous time, and calculating a correction temperature difference delta Tin-s between the current time and the inner ring temperature and the set correction temperature;
and adjusting the rotating speed of the inner motor according to the inner ring temperature difference delta Tin and the corrected temperature difference delta Tin-s.
In some embodiments of the present invention, the set correction temperature is the sum of the set temperature and the first correction temperature
In some embodiments of the present invention, it is preferred that,
under the condition that the inner ring temperature difference delta Tin is fixed, the rotating speed of the inner motor when the corrected temperature difference delta Tin-s is a positive value is larger than the rotating speed of the inner motor when the corrected temperature difference delta Tin-s is a negative value; and/or the presence of a gas in the gas,
and under the condition that the corrected temperature difference delta Tin-s is fixed, the rotating speed of the inner motor is greater when the inner ring temperature difference delta Tin is a positive value than when the inner ring temperature difference delta Tin is a negative value.
In some embodiments of the invention, the internal motor speed is determined by interpolation when adjusting the internal motor speed.
In some embodiments of the present invention, the defrost control method further comprises the steps of: in the defrosting process, the water-soluble agent is dissolved in the water,
when the inner ring temperature meets the following conditions (1) or (2), turning off the electric auxiliary heating equipment:
(1) the temperature of the inner ring is higher than a first preset temperature;
(2) the temperature of the inner ring is higher than a second preset temperature and lasts for a first preset time; wherein the first preset temperature is greater than the second preset temperature.
In some embodiments of the present invention, the defrost control method further comprises the steps of:
when the temperature of the inner ring meets the following conditions (3) or (4), the electric auxiliary heating equipment is started again:
(3) the temperature of the inner ring is less than the sum of the set temperature and the second correction temperature and lasts for a second preset time;
(4) the inner ring temperature is less than the sum of the set temperature and the third correction temperature; wherein the second correction temperature is less than the third correction temperature.
In the defrosting process, if the power of the electric auxiliary heating equipment is large enough, the indoor temperature is overhigh, the user experience is influenced, the electric auxiliary heating equipment is turned off at the moment, the indoor temperature can continuously drop, the electric auxiliary heating equipment needs to be turned on again after the indoor temperature drops to a certain degree, and the indoor temperature can be kept stable through the defrosting control mode.
In some embodiments of the present invention, the defrost control method further comprises the steps of:
and when the air conditioner receives a signal of quitting defrosting, the electric auxiliary heating equipment is closed, and when the temperature of the inner disc reaches the lower one of the temperature of the inner ring before defrosting and the third preset temperature, the rotation of the inner motor is stopped. The inner motor does not stop immediately after exiting defrosting, so that when the inner motor is heated again after exiting defrosting, the waste heat of the electric auxiliary heating equipment is helped to continue heating the indoor heat exchanger, the temperature of the inner disc is increased in an accelerated manner, and the cold wind prevention time is shortened.
According to another aspect of the present invention, there is also provided an air conditioner defrosting control apparatus including:
a memory for storing executable instructions;
a processor to execute the executable instructions stored in the memory to perform the following:
when the air conditioner receives a defrosting signal, the four-way valve is controlled to change the direction;
starting the electric auxiliary heating equipment, and continuously detecting the current set temperature Ts and the current inner ring temperature Tin of the air conditioner;
the inner motor is reversely rotated and operates according to the initial rotating speed N;
and adjusting the rotating speed of the inner motor according to the detected set temperature and the detected inner ring temperature.
According to another aspect of the present invention, there is also provided an air conditioner, including a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps defined by the air conditioner defrosting control method as described above when executing the computer program.
According to another aspect of the present invention, there is also provided a computer readable storage medium having a computer program stored thereon, the computer program, when executed, implementing the steps of the air conditioner defrost control method as described above.
Drawings
Fig. 1 is a schematic step diagram of an air conditioner defrosting control method according to an embodiment of the invention.
FIG. 2 is a schematic diagram of a parameter relationship for adjusting the rotation speed of the internal motor according to the embodiment of the present invention.
FIG. 3 is a timing diagram illustrating defrosting of an air conditioner according to an embodiment of the present invention.
Fig. 4 is a flowchart illustrating an air conditioner defrosting control method according to an embodiment of the present invention.
Fig. 5 is a schematic view of a composition structure of an air conditioner defrosting control device according to an embodiment of the present invention.
Detailed Description
The air conditioner runs in a heating mode, a heat exchanger on the outer side of the air conditioner gradually frosts, a frost layer can prevent heat transfer, the frost layer is continuously thickened along with the continuous running of the air conditioner, after the frost layer reaches a certain thickness, the heating performance of the air conditioner is reduced under the influence of the frost layer, at the moment, if defrosting is not carried out, the frost layer becomes thicker and thicker, the heating effect of the air conditioner is influenced, and aiming at the existing defrosting mode, the invention provides a novel defrosting control method of the air conditioner.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Certain embodiments of the invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, various embodiments of the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
In an embodiment of the present invention, a defrosting control method for an air conditioner is provided, as shown in fig. 1, which includes the following steps:
and S1, when the air conditioner receives the defrosting signal, controlling the four-way valve to reverse.
The air conditioner enters a defrosting state after receiving a defrosting signal, controls the four-way valve to change the direction, namely changes the communication mode of four valve ports of the four-way valve, changes the flowing direction of the refrigerant, converts the heating mode of the air conditioner into a cooling mode, and brings heat to the outdoor side to defrost. The reversing time of the four-way valve is executed according to the time set in the program, the reversing time refers to the time interval from the time when the air conditioner receives the defrosting signal to the time when the four-way valve reverses, for example, the reversing time is 50s, and after the air conditioner receives the defrosting signal, the four-way valve reverses after 50 s.
And S2, starting the electric auxiliary heating equipment, and continuously detecting the current set temperature Ts and the current inner ring temperature Tin of the air conditioner.
After the four-way valve is switched, the air conditioner stops heating, indoor heat can be brought to the outside, in order to supplement the heat, the electric auxiliary heating equipment is started, so that air is heated by the electric auxiliary heating equipment before entering the room from the air conditioner, and the air flows to the inside after being heated. In this step, the temperature detection accuracy is 0.5 ℃, the detection interval is 1s, that is, the current set temperature Ts and the current inner ring temperature Tin are detected once every 1s, and the detection is continuous. It should be noted that the current inner ring temperature Tin is detected by an inner ring sensor at an air inlet of the air conditioner, the current inner ring temperature Tin is different from the current indoor temperature, and the current inner ring temperature Tin is higher than the current indoor temperature, because the temperature of the air heated by the electric auxiliary heating device is higher, and the temperature of the air evaporated and absorbed by the indoor heat exchanger is lower, therefore, the temperature of the air blown out from the air outlet of the air conditioner is lower, and the temperature sensed by the inner ring temperature sensor is higher than the indoor temperature.
And S3, reversing the inner motor and operating according to the initial rotating speed N (rpm).
After the electric auxiliary heating equipment is started, the inner motor rotates reversely according to the initial rotating speed, the rpm is a rotating speed unit, and the initial rotating speed N is set as the mute wind gear rotating speed. When the inner motor rotates forwards, hot air blown out by the air conditioner flows towards the direction of a roof, and cold air flows towards the direction of the indoor ground; after the inner motor is reversed, the indoor air is made to flow reversely, and the hot air at the top of the room is dropped, which helps to maintain the indoor temperature.
S4, calculating an inner ring temperature difference Δ Tin ═ Tin (i) — (i-1) between the current time and the inner ring temperature at the previous time, and calculating a correction temperature difference Δ Tin-S between the current time inner ring temperature and the set correction temperature, in which, as a specific embodiment, the set correction temperature is the sum of the set temperature and a first correction temperature (e.g., 10 ℃), that is, Δ Tin-S ═ Tin (i) - [ ts (i) + the first correction temperature ], and i represents the current time and is a positive integer.
And S5, adjusting the rotating speed of the inner motor according to the inner ring temperature difference delta Tin and the corrected temperature difference delta Tin-S.
The rotation speed of the inner motor is inversely proportional to the air temperature of the air outlet of the air conditioner, namely the rotation speed of the inner motor can influence the indoor temperature, so that the indoor temperature can be maintained stable by adjusting the rotation speed of the inner motor. In the invention, the rotating speed of the inner motor is adjusted according to the inner ring temperature difference delta Tin and the corrected temperature difference delta Tin-s, and the parameter relation of the rotating speed of the inner motor is shown in figure 2.
The higher the rotating speed of the inner motor is, the lower the temperature of the air outlet is, and when the indoor temperature is lower, the rotating speed of the inner motor is reduced, otherwise, the rotating speed of the inner motor is increased. Increasing the rotating speed to reduce the temperature of the air blown into the room; the speed is reduced to raise the temperature of the air blown into the room.
When the corrected temperature difference Δ Tin-s is calculated, the set temperature is added with the first corrected temperature and then is different from the current inner ring temperature, so that air lower than the indoor temperature is prevented from being blown into the room. The temperature of the indoor ceiling is generally higher than the set temperature, for example, the set temperature is 30 ℃, the temperature of the indoor ceiling may reach 35 ℃, if the corrected temperature difference Δ Tin-s is the difference between the inner ring temperature and the set temperature at the current moment, the value of the corrected temperature difference Δ Tin-s is overestimated, and the rotating speed of the inner motor may be increased by mistake, so that the air lower than the indoor temperature is blown in. For example, assuming that the difference between the inner ring temperature and the set temperature at the current time is a positive value and the temperature difference between the inner ring temperature and the (set temperature + first correction temperature (e.g., 10 ℃)) at the current time is a negative value, as shown in fig. 2, when the inner ring temperature difference Δ Tin is 1 and the correction temperature difference Δ Tin-s is a positive value, the rotation speed of the inner motor is greater than N +30, and when the correction temperature difference Δ Tin-s is a negative value, the rotation speed of the inner motor is less than N + 30. Therefore, the fact that the first correction temperature is not considered results in that the rotation speed which should be reduced is changed into the rotation speed which should be increased, so that the indoor temperature is further reduced, and the user experience is influenced.
As further shown in FIG. 2, the ordinate represents the inner loop temperature differential Δ Tin, the abscissa represents the corrected temperature differential Δ Tin-s, and the slashes represent the inner motor speed values, e.g., N-30, N +30 … …. For example, if the corrected temperature difference Δ Tin-s is 10 and the inner ring temperature difference Δ Tin is 0, the inner motor speed should be adjusted to N. As can be seen from FIG. 2, under the condition that the inner ring temperature difference Δ Tin is fixed, the inner motor rotating speed when the corrected temperature difference Δ Tin-s is a positive value is greater than the inner motor rotating speed when the corrected temperature difference Δ Tin-s is a negative value. Under the condition that the corrected temperature difference delta Tin-s is fixed, the rotating speed of the inner motor is greater when the inner ring temperature difference delta Tin is a positive value than when the inner ring temperature difference delta Tin is a negative value.
In addition, when the rotation speed of the inner motor is adjusted, the rotation speed of the inner motor is determined by an interpolation method.
By the steps of the invention, the defrosting of the air conditioner can be controlled, and by starting the electric auxiliary heating equipment, the inner motor rotates reversely and adjusts the rotating speed of the inner motor, the defrosting of the heat exchanger at the outdoor side is accelerated, the defrosting time is shortened, the loss of indoor heat during the defrosting period is reduced, and the indoor temperature is kept stable; and the inner fan rotates reversely to make the indoor air flow reversely, the hot air at the top of the room descends, and the indoor temperature can be still kept. In addition, when defrosting is carried out, the temperature inside the indoor unit is kept stable by starting the electric auxiliary heating equipment, and abnormal sound caused by expansion with heat and contraction with cold of the plastic parts of the indoor unit is avoided.
In this embodiment, the air conditioner defrosting control method further includes the steps of:
s6, when the temperature of the inner ring meets the following conditions (1) or (2), the electric auxiliary heating equipment is turned off:
(1) the temperature of the inner ring is higher than a first preset temperature;
(2) the temperature of the inner ring is higher than a second preset temperature and lasts for a first preset time; the first preset temperature is greater than the second preset temperature, for example, the first preset temperature is 55 ℃, the second preset temperature is 50 ℃, and the first preset time is 10 s.
S7, when the inner ring temperature meets the following conditions (3) or (4), the electric auxiliary heating equipment is started again:
(3) the temperature of the inner ring is less than the sum of the set temperature and the second correction temperature and lasts for a second preset time;
(4) the inner ring temperature is less than the sum of the set temperature and the third correction temperature; the second correction temperature is less than the third correction temperature, for example, the second correction temperature is 5 ℃, the third correction temperature is 10 ℃, and the second preset time is 10 s.
In the defrosting process, if the power of the electric auxiliary heating equipment is large enough, the indoor temperature is overhigh, the user experience is influenced, the electric auxiliary heating equipment is turned off at the moment, the indoor temperature can continuously drop, the electric auxiliary heating equipment needs to be turned on again after the indoor temperature drops to a certain degree, and the indoor temperature can be kept stable through the defrosting control mode.
And S8, when the air conditioner receives a defrosting quitting signal, the electric auxiliary heating equipment is turned off, and when the temperature of the inner disc reaches min { the temperature of the inner ring before defrosting, the third preset temperature }, the rotation of the inner motor is stopped.
And after receiving the defrosting quitting signal, the air conditioner quits the defrosting state, the electric auxiliary heating equipment is turned off, the inner motor continues to rotate at the moment, and after a period of time, when the temperature of the inner disc reaches min { the temperature of the inner ring before defrosting, the temperature of the third preset temperature }, the rotation of the inner motor is stopped. After defrosting exits, reversing the four-way valve after defrosting exits and reversing time, wherein the defrosting exiting and reversing time refers to a time interval from when the air conditioner receives a defrosting exiting signal to when the four-way valve reverses, as shown in fig. 3, fig. 3 is a timing diagram of defrosting of the air conditioner, a broken line represents the change of the power of the compressor on a time axis, after the air conditioner receives the defrosting signal, the compressor stops working, after a period of time, the four-way valve reverses, the electric auxiliary heating equipment is started, and the inner motor reverses; then, the power of the compressor is gradually increased to a stable operation, after another period of time, the air conditioner receives a defrosting quit signal, the electric auxiliary heating equipment is turned off, after another period of time (the four-way valve reversing time after the defrosting quit), the four-way valve reverses, then, the power of the compressor is gradually increased to the stable operation, when the temperature of the inner disc reaches min { the temperature of the inner ring before defrosting, the third preset temperature }, the inner motor stops rotating, min { the temperature of the inner ring before defrosting, the third preset temperature } represents the minimum value between the temperature of the inner ring before defrosting and the third preset temperature, and the third preset temperature is 20 ℃ for example.
From the above, after the defrosting is stopped, the motor is still operated until the temperature of the inner disc reaches min { the temperature of the inner ring before defrosting, the third preset temperature }, and the inner motor stops. The inner motor does not stop immediately after exiting defrosting, so that when the inner motor is heated again after exiting defrosting, the waste heat of the electric auxiliary heating equipment is helped to continue heating the indoor heat exchanger, the temperature of the inner disc is increased in an accelerated manner, and the cold wind prevention time is shortened.
In the invention, when the air conditioner receives a defrosting signal, the air conditioner enters a defrosting state, meanwhile, the electric auxiliary heating equipment is started, the electric auxiliary heating equipment heats the evaporator, and the refrigerant brings the heat of the evaporator out of the condenser for defrosting. And when the air conditioner receives the defrosting quitting signal, the air conditioner quits the defrosting state, and simultaneously the electric auxiliary heat recovery returns to the user set state. By the defrosting control method, defrosting can be accelerated, indoor temperature is kept stable, and user experience is improved.
As shown in fig. 4, the control logic of the defrost control method is as follows:
the air conditioner receives the defrosting signal and enters a defrosting state;
reversing the four-way valve;
the electric auxiliary heating equipment is started, and the inner motor rotates reversely at the initial rotating speed;
detecting a user set temperature Ts and an inner ring temperature Tin;
calculating the inner ring temperature difference delta Tin and the corrected temperature difference delta Tin-s;
adjusting the rotating speed of the inner motor according to the inner ring temperature difference delta Tin and the corrected temperature difference delta Tin-s;
the air conditioner receives a defrosting quitting signal, and the electric auxiliary heating equipment is closed;
detecting the temperature of the inner disc, and calculating min (the temperature of the inner ring before defrosting, 20 ℃);
judging whether the temperature of the inner disc is more than or equal to min { inner ring temperature before defrosting, 20 ℃) }, if so, stopping the inner motor, and if not, continuously detecting the temperature of the inner disc;
in the defrosting process, judging whether the temperature of the inner ring is greater than 55 ℃ or whether the temperature of the inner ring is greater than 50 ℃ and lasts for 10s, if so, closing the electric auxiliary heating equipment, and if not, continuously detecting the temperature of the inner ring;
and judging whether the temperature of the inner ring is less than (the set temperature is plus 5 ℃) and lasts for 10s or whether the temperature of the inner ring is less than (the set temperature is plus 10 ℃), if so, resuming to start the electric auxiliary heating equipment, and if not, continuing to detect the temperature of the inner ring.
In an embodiment of the present invention, there is also provided an air conditioner defrosting control apparatus, as shown in fig. 5, including:
a memory for storing executable instructions;
a processor to execute executable instructions stored in the memory to perform the following operations:
when the air conditioner receives a defrosting signal, the four-way valve is controlled to change the direction;
starting the electric auxiliary heating equipment, and continuously detecting the current set temperature Ts and the current inner ring temperature Tin of the air conditioner;
the inner motor is reversely rotated and works according to the initial rotating speed N (rpm);
calculating an inner ring temperature difference Δ Tin ═ Tin (i) — (i) -Tin (i-1) between the current time and the inner ring temperature at the previous time, and calculating a corrected temperature difference Δ Tin-s ═ Tin (i) between the inner ring temperature at the current time and (set temperature + first corrected temperature (e.g., 10 ℃), where i represents the current time and is a positive integer;
and adjusting the rotating speed of the inner motor according to the inner ring temperature difference delta Tin and the corrected temperature difference delta Tin-s.
In this embodiment, an air conditioner is further provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps defined in the air conditioner defrosting control method as described above when executing the computer program.
In the present embodiment, there is also provided a computer-readable storage medium having a computer program stored thereon, the computer program, when executed, implementing the steps of the air conditioner defrosting control method as set forth in the above present embodiment.
Up to this point, the present embodiment has been described in detail with reference to the accompanying drawings. In light of the above description, those skilled in the art should clearly recognize the air conditioner defrosting control method, apparatus, air conditioner and computer readable storage medium of the present invention.
It should be noted that unless specifically described or steps that must occur in sequence, the order of the steps is not limited to that listed above and may be varied or rearranged as desired. The embodiments described above may be mixed and matched with each other or with other embodiments based on design and reliability considerations, i.e., technical features in different embodiments may be freely combined to form further embodiments.
It will be understood by those skilled in the art that all or part of the steps in the methods of the embodiments described above may be implemented by hardware instructions of a program, and the program may be stored in a computer-readable storage medium, where the storage medium includes Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), one-time Programmable Read-Only Memory (otp ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), compact disc Read-Only Memory (CD-ROM), or other disk memories, A tape memory, or any other medium readable by a computer that can be used to carry or store data.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (11)
1. A defrosting control method is characterized by comprising the following steps:
when the air conditioner receives a defrosting signal, the four-way valve is controlled to change the direction;
starting the electric auxiliary heating equipment, and continuously detecting the current set temperature Ts and the current inner ring temperature Tin of the air conditioner;
the inner motor is reversely rotated and operates according to the initial rotating speed N;
and adjusting the rotating speed of the inner motor according to the detected set temperature and the detected inner ring temperature.
2. Defrost control method according to claim 1, characterized in that when adjusting the inner motor speed,
calculating an inner ring temperature difference delta Tin between the current time and the inner ring temperature at the previous time, and calculating a correction temperature difference delta Tin-s between the current time and the inner ring temperature and the set correction temperature;
and adjusting the rotating speed of the inner motor according to the inner ring temperature difference delta Tin and the corrected temperature difference delta Tin-s.
3. The defrost control method of claim 2, wherein the set correction temperature is a sum of the set temperature and a first correction temperature.
4. The defrost control method of claim 2,
under the condition that the inner ring temperature difference delta Tin is fixed, the rotating speed of the inner motor when the corrected temperature difference delta Tin-s is a positive value is larger than the rotating speed of the inner motor when the corrected temperature difference delta Tin-s is a negative value; and/or the presence of a gas in the gas,
and under the condition that the corrected temperature difference delta Tin-s is fixed, the rotating speed of the inner motor is greater when the inner ring temperature difference delta Tin is a positive value than when the inner ring temperature difference delta Tin is a negative value.
5. Defrost control method according to claim 4, characterized in that the inner motor speed is determined by interpolation when adjusting the inner motor speed.
6. The defrost control method of claim 1 further comprising the steps of: in the defrosting process, the water-soluble agent is dissolved in the water,
when the inner ring temperature meets the following conditions (1) or (2), turning off the electric auxiliary heating equipment:
(1) the temperature of the inner ring is higher than a first preset temperature;
(2) the temperature of the inner ring is higher than a second preset temperature and lasts for a first preset time; wherein the first preset temperature is greater than the second preset temperature.
7. The defrost control method of claim 6 further comprising the steps of:
when the temperature of the inner ring meets the following conditions (3) or (4), the electric auxiliary heating equipment is started again:
(3) the temperature of the inner ring is less than the sum of the set temperature and the second correction temperature and lasts for a second preset time;
(4) the inner ring temperature is less than the sum of the set temperature and the third correction temperature; wherein the second correction temperature is less than the third correction temperature.
8. The defrost control method of claim 1 further comprising the steps of:
and when the air conditioner receives a signal of quitting defrosting, the electric auxiliary heating equipment is closed, and when the temperature of the inner disc reaches the lower one of the temperature of the inner ring before defrosting and the third preset temperature, the rotation of the inner motor is stopped.
9. An air conditioner defrosting control device, characterized in that it includes:
a memory for storing executable instructions;
a processor to execute the executable instructions stored in the memory to perform the following:
when the air conditioner receives a defrosting signal, the four-way valve is controlled to change the direction;
starting the electric auxiliary heating equipment, and continuously detecting the current set temperature Ts and the current inner ring temperature Tin of the air conditioner;
the inner motor is reversely rotated and operates according to the initial rotating speed N;
and adjusting the rotating speed of the inner motor according to the detected set temperature and the detected inner ring temperature.
10. An air conditioner, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps defined by the air conditioner defrost control method according to any one of claims 1-8 when executing the computer program.
11. A computer-readable storage medium, having stored thereon a computer program which, when executed, implements the steps of the air conditioner defrost control method of any of claims 1-8.
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| CN112944594A (en) * | 2021-01-29 | 2021-06-11 | 青岛海尔空调器有限总公司 | Method and device for defrosting control of air conditioner and air conditioner |
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