CN114135986B - Air conditioner, control method thereof and computer readable storage medium - Google Patents
Air conditioner, control method thereof and computer readable storage medium Download PDFInfo
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- CN114135986B CN114135986B CN202010926343.6A CN202010926343A CN114135986B CN 114135986 B CN114135986 B CN 114135986B CN 202010926343 A CN202010926343 A CN 202010926343A CN 114135986 B CN114135986 B CN 114135986B
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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
- F24F11/67—Switching between heating and cooling modes
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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
- F24F11/86—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
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid 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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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method of an air conditioner, which comprises the following steps: after the air conditioner operates in a refrigeration mode, current of a compressor in the air conditioner is obtained at fixed time, and the compressor is a fixed-frequency compressor; when the current is larger than the refrigerating rated current, the current coil temperature of the indoor heat exchanger is obtained; determining a current interval in which the current is located, and determining a target coil temperature corresponding to the current interval; and when the current coil temperature is higher than the target coil temperature, reducing the wind speed of an indoor fan in the air conditioner. The invention also discloses an air conditioner and a computer readable storage medium. The air conditioner has high refrigeration stability.
Description
Technical Field
The present invention relates to the field of air conditioners, and more particularly, to an air conditioner, a control method thereof, and a computer readable storage medium.
Background
In the refrigerating mode, the constant-frequency air conditioner can increase the power of the constant-frequency compressor due to the fact that the ambient temperature is too high. In addition, the outdoor heat exchanger is outdoor, so that the outdoor heat exchanger is dirty and blocked, and the outdoor heat exchanger is oxidized and damaged, so that the heat exchange efficiency of the outdoor heat exchanger is reduced. Under the lower condition of heat exchange efficiency, the compressor needs to be refrigerated by further increasing power, so that overload protection of the compressor can be triggered, the compressor is stopped, the air conditioner exits from a refrigeration mode, and the refrigeration stability of the air conditioner is poor.
Disclosure of Invention
The invention mainly aims to provide an air conditioner, a control method thereof and a computer readable storage medium, and aims to solve the problem of poor refrigeration stability of the air conditioner.
In order to achieve the above object, the present invention provides a control method of an air conditioner, the control method of the air conditioner comprising the following steps:
after the air conditioner operates in a refrigeration mode, current of a compressor in the air conditioner is obtained at fixed time, and the compressor is a fixed-frequency compressor;
when the current is larger than the refrigerating rated current, the current coil temperature of the indoor heat exchanger is obtained;
determining a current interval in which the current is located, and determining a target coil temperature corresponding to the current interval;
and when the current coil temperature is higher than the target coil temperature, reducing the wind speed of an indoor fan in the air conditioner.
In one embodiment, the step of reducing the wind speed of the indoor fan in the air conditioner includes:
and reducing the windshield gear of the indoor fan so as to reduce the wind speed of the indoor fan.
In one embodiment, the step of lowering a damper gear of a fan of the air conditioner includes:
determining the number of downshifts of the wind speed gear of the indoor fan according to the current interval, wherein the larger the current interval is, the larger the number of downshifts is;
and reducing the windshield gear of the indoor fan according to the downshift number.
In one embodiment, the step of reducing the windshield gear of the indoor fan according to the number of downshifts includes:
determining a minimum wind speed gear of the indoor fan according to the current interval;
determining a target wind speed gear of the indoor fan according to the down shift number, the minimum wind speed gear and the current wind speed gear of the indoor fan, wherein the target wind speed gear is larger than or equal to the minimum wind speed gear and smaller than or equal to the current wind speed gear;
and adjusting the current wind speed gear of the indoor fan to the target wind speed gear.
In an embodiment, when the target wind speed gear is equal to the minimum wind speed gear, the indoor fan is controlled to operate according to the minimum wind speed corresponding to the current windshield gear.
In an embodiment, after the step of reducing the wind speed of the indoor fan in the air conditioner, the method further includes:
and when the target coil temperature is higher than the preset coil temperature, adjusting the air outlet angle of the air deflector of the air conditioner to be the minimum air outlet angle.
In an embodiment, after the step of adjusting the air outlet angle of the air deflector of the air conditioner to the minimum air outlet angle, the method further includes:
and when the current is smaller than or equal to the refrigerating rated current, recovering the wind speed of the indoor fan to the set wind speed, and recovering the wind outlet angle of the wind deflector to the set wind outlet angle.
In an embodiment, the control method of the air conditioner further includes:
after the air conditioner operates in a refrigeration mode, acquiring an outdoor temperature;
and executing the step of acquiring the current of the compressor in the air conditioner at fixed time when the outdoor temperature is greater than the preset outdoor temperature.
In order to achieve the above object, the present invention also provides an air conditioner including a memory, a processor, and a control program stored in the memory and executable on the processor, which when executed by the processor, implements the respective steps of the control method of the air conditioner as described above.
In order to achieve the above object, the present invention also provides a computer-readable storage medium storing a control program which, when executed by a processor, implements the respective steps of the control method of an air conditioner as described above.
The invention provides an air conditioner, a control method thereof and a computer readable storage medium, wherein after the air conditioner operates in a refrigeration mode, the current of a fixed-frequency compressor in the air conditioner is obtained at fixed time, when the current is larger than the refrigeration rated current, the current coil temperature of an indoor heat exchanger is obtained, the air conditioner determines the current interval in which the current is positioned, so as to determine the target coil temperature corresponding to the current interval, and when the current coil temperature is larger than the target coil temperature, the wind speed of an indoor fan in the air conditioner is reduced. Because the air conditioner can confirm that the compressor appears overload protection when confirming that the electric current of fixed frequency compressor is greater than refrigeration rated current and the current coil pipe temperature of indoor heat exchanger is greater than target coil pipe temperature, the air conditioner reduces the wind speed of indoor fan to reduce the coil pipe temperature of indoor heat exchanger, avoid the power of compressor to continue to increase, and then avoid the compressor to get into overload protection and lead to the air conditioner to stop refrigerating, the refrigeration stability of air conditioner is high.
Drawings
Fig. 1 is a schematic diagram of a hardware architecture of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a flowchart of a control method of an air conditioner according to a first embodiment of the present invention;
FIG. 3 is a flowchart illustrating a control method of an air conditioner according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of a refinement flow of step S31 in a third embodiment of a control method of an air conditioner according to the present invention;
fig. 5 is a flowchart illustrating a control method of an air conditioner according to a fourth embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The main solutions of the embodiments of the present invention are: after the air conditioner operates in a refrigeration mode, current of a compressor in the air conditioner is obtained at fixed time, and the compressor is a fixed-frequency compressor; when the current is larger than the refrigerating rated current, the current coil temperature of the indoor heat exchanger is obtained; determining a current interval in which the current is located, and determining a target coil temperature corresponding to the current interval; and when the current coil temperature is higher than the target coil temperature, reducing the wind speed of an indoor fan in the air conditioner.
Because the air conditioner can confirm that the compressor appears overload protection when confirming that the electric current of fixed frequency compressor is greater than refrigeration rated current and the current coil pipe temperature of indoor heat exchanger is greater than target coil pipe temperature, the air conditioner reduces the wind speed of indoor fan to reduce the coil pipe temperature of indoor heat exchanger, avoid the power of compressor to continue to increase, and then avoid the compressor to get into overload protection and lead to the air conditioner to stop refrigerating, the refrigeration stability of air conditioner is high.
As shown in fig. 1, fig. 1 is a schematic diagram of a hardware architecture of an air conditioner according to an embodiment of the present invention.
The terminal related to the embodiment of the invention can be an air conditioner, and the air conditioner comprises: a processor 101, such as a CPU, a memory 102, and a communication bus 103. Wherein the communication bus 103 is used to enable connected communication among the components.
The memory 102 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. As shown in fig. 1, a control program may be included in the memory 103 as one type of computer storage medium; and the processor 101 may be configured to call a control program stored in the memory 102 and perform the following operations:
after the air conditioner operates in a refrigeration mode, current of a compressor in the air conditioner is obtained at fixed time, and the compressor is a fixed-frequency compressor;
when the current is larger than the refrigerating rated current, the current coil temperature of the indoor heat exchanger is obtained;
determining a current interval in which the current is located, and determining a target coil temperature corresponding to the current interval;
and when the current coil temperature is higher than the target coil temperature, reducing the wind speed of an indoor fan in the air conditioner.
In one embodiment, the step of reducing the wind speed of the indoor fan in the air conditioner includes:
and reducing the windshield gear of the indoor fan so as to reduce the wind speed of the indoor fan.
In one embodiment, the processor 101 may be configured to call a control program stored in the memory 102 and perform the following operations:
determining the number of downshifts of the wind speed gear of the indoor fan according to the current interval, wherein the larger the current interval is, the larger the number of downshifts is;
and reducing the windshield gear of the indoor fan according to the downshift number.
In one embodiment, the processor 101 may be configured to call a control program stored in the memory 102 and perform the following operations:
determining a minimum wind speed gear of the indoor fan according to the current interval;
determining a target wind speed gear of the indoor fan according to the down shift number, the minimum wind speed gear and the current wind speed gear of the indoor fan, wherein the target wind speed gear is larger than or equal to the minimum wind speed gear and smaller than or equal to the current wind speed gear;
and adjusting the current wind speed gear of the indoor fan to the target wind speed gear.
In one embodiment, the processor 101 may be configured to call a control program stored in the memory 102 and perform the following operations:
and when the target wind speed gear is equal to the minimum wind speed gear, controlling the indoor fan to operate according to the minimum wind speed corresponding to the current windshield gear.
In one embodiment, the processor 101 may be configured to call a control program stored in the memory 102 and perform the following operations:
and when the target coil temperature is higher than the preset coil temperature, adjusting the air outlet angle of the air deflector of the air conditioner to be the minimum air outlet angle.
In one embodiment, the processor 101 may be configured to call a control program stored in the memory 102 and perform the following operations:
and when the current is smaller than or equal to the refrigerating rated current, recovering the wind speed of the indoor fan to the set wind speed, and recovering the wind outlet angle of the wind deflector to the set wind outlet angle.
In one embodiment, the processor 101 may be configured to call a control program stored in the memory 102 and perform the following operations:
after the air conditioner operates in a refrigeration mode, acquiring an outdoor temperature;
and executing the step of acquiring the current of the compressor in the air conditioner at fixed time when the outdoor temperature is greater than the preset outdoor temperature.
According to the scheme, after the air conditioner operates in the refrigeration mode, the current of the fixed-frequency compressor in the air conditioner is obtained at fixed time, when the current is larger than the refrigeration rated current, the current temperature of the indoor heat exchanger is obtained, the air conditioner determines a current interval in which the current is located, so that the target coil temperature corresponding to the current interval is determined, and when the current coil temperature is larger than the target coil temperature, the wind speed of an indoor fan in the air conditioner is reduced. Because the air conditioner can confirm that the compressor appears overload protection when confirming that the electric current of fixed frequency compressor is greater than refrigeration rated current and the current coil pipe temperature of indoor heat exchanger is greater than target coil pipe temperature, the air conditioner reduces the wind speed of indoor fan to reduce the coil pipe temperature of indoor heat exchanger, avoid the power of compressor to continue to increase, and then avoid the compressor to get into overload protection and lead to the air conditioner to stop refrigerating, the refrigeration stability of air conditioner is high.
Based on the hardware architecture of the air conditioner, the embodiment of the control method of the air conditioner is provided.
Referring to fig. 2, fig. 2 is a first embodiment of a control method of an air conditioner according to the present invention, the control method of the air conditioner includes the steps of:
step S10, after an air conditioner operates in a refrigeration mode, current of a compressor in the air conditioner is obtained at regular time, and the compressor is a fixed-frequency compressor;
in this embodiment, the execution body is an air conditioner. The air conditioner is provided with a compressor, and the compressor is a fixed-frequency compressor. The air conditioner is provided with a current detection device for detecting the current of the compressor. After the air conditioner is in the refrigerating mode, the compressor is operated at a fixed frequency, and the air conditioner starts the current detection device to acquire the current of the compressor.
The air conditioner can acquire the current of the compressor detected by the current detection device at regular time. The timing duration may be any suitable value, for example, the timing duration may be 20 minutes.
Step S20, when the current is larger than the refrigerating rated current, the current coil temperature of the indoor heat exchanger is obtained;
the air conditioner stores a refrigerating rated current which represents the maximum current when the compressor does not run in overload, and if the current of the compressor is larger than the refrigerating rated current, the compressor can be determined to work in overload, namely the current power of the compressor is larger than the rated power.
After the air conditioner obtains the current of the compressor each time, the current is compared with the rated refrigeration current. When the current is larger than the rated refrigeration current, the air conditioner obtains the current coil temperature of the indoor heat exchanger through a temperature sensor at the indoor heat exchanger. The current coil temperature of the indoor heat exchanger can characterize the current condensing capacity of the air conditioner.
Step S30, determining a current interval in which the current is located, and determining a target coil temperature corresponding to the current interval;
the air conditioner is provided with a current section which at least comprises a first section [ I ] 0 ，I 1 ) Second interval [ I ] 1 ，I 2 ) Third interval [ I ] 2 ，I 3 ) Wherein I 0 For refrigerating rated current, I 1 Ratio I 0 Large 1A-2A, I 2 Ratio I 1 The current is 1A-2A, and I 3 Ratio of I2 The current is greater than 1A-2A. And each current interval is associated with a target coil temperature. For example, a first interval correlates to a target coil temperature T set1 Correlating the second interval with the target coil temperature T set2 The third interval is related with the target coil temperature T set3 . And the larger the current interval, the greater the target coil temperature corresponding to the current interval. The reason for this is that the larger the current interval, the larger the power of the compressor, the higher the refrigerating capacity of the air conditioner per unit time, and the higher the tolerance to the condensing capacity of the indoor heat exchanger, i.e., the higher the coil temperature of the indoor heat exchanger can be allowed. T (T) set1 、T set2 T is as follows set3 May be of any suitable value, e.g., T set1 Preferably 15-18 ℃, T set2 Preferably 17-20 ℃, T set1 Preferably 18℃to 21 ℃.
When the current of the compressor is determined to be larger than the refrigerating rated current, the air conditioner determines a current interval in which the current is located, and then determines a target coil temperature corresponding to the current interval, namely, obtains the target coil temperature associated with the current interval.
And step S40, when the current coil temperature is greater than the target coil temperature, reducing the wind speed of an indoor fan in the air conditioner.
After determining the target coil temperature, the air conditioner judges whether the current coil temperature is greater than the target coil temperature. If the current coil temperature is higher than the target coil temperature, the condensation efficiency of the current indoor heat exchanger is lower, and because the current of the compressor is higher than the refrigerating rated current, even if the compressor is in an overload working state, the condensation efficiency of the indoor heat exchanger is lower, and the compressor has the trend of continuously increasing the power.
In this way, the air conditioner reduces the air speed of the indoor fan, reduces the air flow rate of the indoor heat exchanger, further reduces the heat exchange quantity of the indoor heat exchanger in unit time, and reduces the temperature of the coil pipe of the indoor heat exchanger. The air conditioner may reduce the wind speed of the indoor fan by a preset threshold value.
When the current is smaller than or equal to the rated refrigerating current, the air conditioner works normally without reducing the wind speed of the indoor fan.
In the technical scheme provided by the embodiment, after the air conditioner operates in a refrigeration mode, the current of the fixed-frequency compressor in the air conditioner is obtained at fixed time, when the current is larger than the refrigeration rated current, the current coil temperature of the indoor heat exchanger is obtained, the air conditioner determines the current interval in which the current is located, so as to determine the target coil temperature corresponding to the current interval, and when the current coil temperature is larger than the target coil temperature, the wind speed of the indoor fan in the air conditioner is reduced. Because the air conditioner can confirm that the compressor appears overload protection when confirming that the electric current of fixed frequency compressor is greater than refrigeration rated current and the current coil pipe temperature of indoor heat exchanger is greater than target coil pipe temperature, the air conditioner reduces the wind speed of indoor fan to reduce the coil pipe temperature of indoor heat exchanger, avoid the power of compressor to continue to increase, and then avoid the compressor to get into overload protection and lead to the air conditioner to stop refrigerating, the refrigeration stability of air conditioner is high.
Referring to fig. 3, fig. 3 is a second embodiment of a control method of an air conditioner according to the present invention, based on the first embodiment, the step S40 includes:
and S41, when the current coil temperature is greater than the target coil temperature, reducing the windshield gear of the indoor fan so as to reduce the wind speed of the indoor fan.
In this embodiment, the air conditioner sets a wind speed gear of the indoor fan, and when the wind speed gear is larger, the wind speed of the indoor fan is larger. When the power of the compressor needs to be restrained from continuously increasing, the air conditioner can reduce the wind speed gear of the indoor fan to reduce the wind speed of the indoor fan.
The number of downshifts in the wind speed gear of the indoor fan is related to the power level of the compressor and the current coil temperature of the indoor heat exchanger. The greater the power and the higher the current coil temperature, the greater the number of downshifts in the wind speed gear of the indoor heat exchanger. In addition, the wind speed gear is a wind speed range value, the air conditioner firstly reduces the wind speed gear of the indoor fan according to the current interval in which the current is positioned so as to reduce the wind speed of the indoor fan to the default wind speed of the wind speed gear, then corrects the default wind speed according to the difference between the current coil temperature and the target coil temperature corresponding to the current interval, the larger the difference is, the larger the decrement value of the default wind speed is, but the corrected wind speed does not exceed the minimum wind speed of the current wind speed gear.
In the technical scheme provided by the embodiment, the air conditioner reduces the wind speed of the indoor fan by reducing the wind speed gear of the indoor fan, keeps or reduces the condensation temperature of the indoor heat exchanger, and avoids the condition that the compressor is stopped due to the fact that the power of the compressor is continuously increased.
Referring to fig. 4, fig. 4 is a third embodiment of a control method of an air conditioner according to the present invention, based on the second embodiment, the step S41 includes:
step S411, determining the number of downshifts of the wind speed gear of the indoor fan according to the current interval, wherein the larger the current interval is, the larger the number of downshifts is;
and step S412, reducing the windshield gear of the indoor fan according to the downshift number.
In this embodiment, the indoor fan reduces the wind speed by reducing the wind speed gear. And the air conditioner determines the down shift number of the wind speed gear of the indoor fan according to the current interval of the current of the compressor. The larger the current interval, the larger the number of downshifts. For example, the current interval is a third interval [ I ] 2 ，I 3 ) When the number of downshifts is 2; and the current interval is the second interval [ I ] 1 ，I 2 ) At this time, the number of downshifts is 1.
After the air conditioner determines the number of downshifts, the wind speed gear of the indoor fan is reduced according to the number of downshifts, so that the wind speed of the indoor fan is reduced.
In the technical scheme provided by the embodiment, when the current coil temperature of the indoor heat exchanger is greater than the target coil temperature, determining the down-shift number of the wind speed gear of the indoor fan according to the current interval where the current of the compressor is located, thereby reducing the wind speed gear of the indoor fan according to the down-shift number.
In an embodiment, in order to ensure the cooling effect of the air conditioner, the indoor fan needs a certain wind speed, i.e. the wind speed of the indoor fan cannot be reduced too low. In this way, the air conditioner sets a minimum wind speed gear corresponding to each current interval, and the larger the current interval is, the smaller the minimum wind speed gear corresponding to the current interval is. For example, the wind speed gear of the indoor fan is divided into three wind speed gears of 1, 2 and 3, and if the current interval is the first interval, the minimum wind speed gear corresponding to the first interval is 2, and the minimum wind speed gear corresponding to the second interval and the third interval is 1.
After determining the number of downshifts of the indoor fan, the air conditioner determines the current minimum wind speed gear of the indoor fan according to the current interval, and determines the template wind speed gear of the indoor fan according to the number of downshifts, the minimum wind speed gear and the current wind speed gear of the indoor fan, wherein the target wind speed gear is smaller than or equal to the minimum wind speed gear and larger than or equal to the current wind speed gear.
Specifically, the air conditioner compares the minimum wind speed gear with the current wind speed gear, if the current wind speed gear is the minimum wind speed gear, the indoor fan maintains the current wind speed gear, and the current wind speed gear is the target wind speed gear, but the indoor fan is required to be controlled to operate at the minimum wind speed in the current wind speed gear, so that the rising of the coil temperature of the indoor heat exchanger is delayed to the maximum extent, and the continuous increase of the power of the compressor is avoided to the maximum extent. When the current wind speed gear is larger than the minimum wind speed gear, the air conditioner firstly determines a wind speed gear to be determined after the indoor fan adjusts a windshield according to the current wind speed gear and the number of downshifts, and if the wind speed gear to be determined is larger than or equal to the minimum wind speed gear, the wind speed gear to be determined is determined to be a target wind speed gear; and if the wind speed gear to be determined is smaller than the minimum wind speed gear, determining the minimum wind speed gear as the target wind speed gear. And when the current wind speed gear is larger than the minimum wind speed gear, the air conditioner adjusts the current wind speed gear of the indoor fan to be the target wind speed gear.
Referring to fig. 5, fig. 5 is a fourth embodiment of a control method of an air conditioner according to the present invention, and after the step S40, the method further includes:
and S50, when the target coil temperature is higher than the preset coil temperature, adjusting the air outlet angle of the air deflector of the air conditioner to be the minimum air outlet angle.
In this embodiment, the angle of the air deflector determines the air output of the air conditioner, and the larger the air output is, the larger the heat exchange amount per unit time of the indoor heat exchanger is. The preset coil temperature can be set in the air conditioner, and when the target coil temperature is larger than the preset coil temperature, the power of the compressor is increased excessively, so that overload protection of the compressor can be triggered with high probability. In this way, after the air conditioner determines that the target coil temperature is greater than the preset coil temperature and reduces the wind speed of the indoor fan, the air outlet angle of the air deflector of the air conditioner is adjusted to be the minimum air outlet angle, namely the air deflector is driven to the lowest air outlet, so that the air outlet of the air conditioner is minimum in the current wind speed gear. The preset coil temperature may be determined according to a target coil temperature corresponding to the current interval, for example, the target coil temperature corresponding to the third interval may be set to be the preset coil temperature, that is, when the wind speed of the indoor fan is reduced and the current of the compressor is in the third interval, the air outlet angle of the air deflector is adjusted to be the minimum air outlet angle.
In addition, the air conditioner may determine an angle decrease value of the air deflector according to a difference between the current coil temperature and the target coil temperature. The larger the difference, the larger the angle decrease value. The air conditioner can also determine an angle reduction value according to the difference value and the current wind speed after the wind speed of the indoor fan is reduced, for example, if the difference value is larger than a threshold value and the current wind speed is smaller than a preset wind speed, the preset reduction value is used as the angle reduction value.
After the air outlet angle of the air deflector is adjusted, the current of the compressor is obtained at fixed time by the air conditioner, if the current of the compressor is smaller than or equal to the rated refrigeration current, the rotating speed of the indoor fan is recovered to the set wind speed, and the air outlet angle of the air deflector is recovered to the set air outlet angle.
In the technical scheme provided by the embodiment, after the rotation speed of the indoor fan is reduced, if the target coil temperature is greater than the preset coil temperature, the air outlet angle of the air deflector of the air conditioner is adjusted to be the minimum air outlet angle, so that the air conditioner is combined with the reduction of the wind speed and the smaller air outlet angle of the air deflector to inhibit the power increase of the compressor.
In an embodiment, after the air conditioner operates in the cooling mode, if the outdoor temperature is too high, the air conditioner obtains less cold from the outside, and the condensing effect of the indoor heat exchanger is lower than that of the indoor heat exchanger. And because of the high outdoor temperature, the air conditioner needs to meet the continuous refrigeration requirement of users. I.e. the compressor is easily overload protected when the outdoor temperature is too high.
In this regard, a preset outdoor temperature is set in the air conditioner, and after the air conditioner operates in a cooling mode, the outdoor temperature is obtained, and whether the outdoor temperature is greater than the preset outdoor temperature is determined. If the outdoor temperature is higher than the preset outdoor temperature, the compressor can be determined to have high probability of overload protection. For this, the air conditioner performs steps S10 to S40.
The invention also provides an air conditioner which comprises a memory, a processor and a control program stored in the memory and capable of running on the processor, wherein the control program realizes the steps of the control method of the air conditioner according to the embodiment when being executed by the processor.
The present invention also provides a computer-readable storage medium storing a control program which, when executed by a processor, implements the steps of the control method of an air conditioner as described in the above embodiments.
The invention also provides an air conditioner which comprises a memory, a processor and a control program stored in the memory and capable of running on the processor, wherein the control program realizes the steps of the control method of the air conditioner according to the embodiment when being executed by the processor.
The present invention also provides a computer-readable storage medium storing a control program which, when executed by a processor, implements the steps of the control method of an air conditioner as described above.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air-conditioning device, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description of the preferred embodiments of the present invention should not be taken as limiting the scope of the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following description and drawings.
Claims (10)
1. The control method of the air conditioner is characterized by comprising the following steps of:
after the air conditioner operates in a refrigeration mode, current of a compressor in the air conditioner is obtained at fixed time, and the compressor is a fixed-frequency compressor;
when the current is larger than the refrigerating rated current, the current coil temperature of the indoor heat exchanger is obtained;
determining a current interval in which the current is located, and determining a target coil temperature corresponding to the current interval; wherein each of said current intervals is associated with one of said target coil temperatures;
and when the current coil temperature is higher than the target coil temperature, reducing the wind speed of an indoor fan in the air conditioner.
2. The method of controlling an air conditioner as claimed in claim 1, wherein the step of reducing the wind speed of an indoor fan in the air conditioner comprises:
and reducing the windshield gear of the indoor fan so as to reduce the wind speed of the indoor fan.
3. The method of controlling an air conditioner as set forth in claim 2, wherein the step of lowering a damper gear of a fan of the air conditioner includes:
determining the number of downshifts of the wind speed gear of the indoor fan according to the current interval, wherein the larger the current interval is, the larger the number of downshifts is;
and reducing the windshield gear of the indoor fan according to the downshift number.
4. The control method of an air conditioner as set forth in claim 3, wherein said step of reducing a damper shift position of said indoor fan according to said number of downshifts includes:
determining a minimum wind speed gear of the indoor fan according to the current interval;
determining a target wind speed gear of the indoor fan according to the down shift number, the minimum wind speed gear and the current wind speed gear of the indoor fan, wherein the target wind speed gear is larger than or equal to the minimum wind speed gear and smaller than or equal to the current wind speed gear;
and adjusting the current wind speed gear of the indoor fan to the target wind speed gear.
5. The control method of an air conditioner according to claim 4, wherein when the target wind speed gear is equal to the minimum wind speed gear, the indoor fan is controlled to operate according to a minimum wind speed corresponding to the current wind speed gear.
6. The method for controlling an air conditioner as set forth in any one of claims 1 to 5, wherein after the step of reducing the wind speed of an indoor fan in the air conditioner, further comprising:
and when the target coil temperature is higher than the preset coil temperature, adjusting the air outlet angle of the air deflector of the air conditioner to be the minimum air outlet angle.
7. The method for controlling an air conditioner as set forth in claim 6, wherein after the step of adjusting the outlet angle of the air deflector of the air conditioner to a minimum outlet angle, further comprising:
and when the current is smaller than or equal to the refrigerating rated current, recovering the wind speed of the indoor fan to the set wind speed, and recovering the wind outlet angle of the wind deflector to the set wind outlet angle.
8. The control method of an air conditioner according to any one of claims 1 to 5, further comprising:
after the air conditioner operates in a refrigeration mode, acquiring an outdoor temperature;
and executing the step of acquiring the current of the compressor in the air conditioner at fixed time when the outdoor temperature is greater than the preset outdoor temperature.
9. An air conditioner comprising a memory, a processor and a control program stored in the memory and executable on the processor, which when executed by the processor, implements the respective steps of the control method of an air conditioner as claimed in any one of claims 1 to 8.
10. A computer-readable storage medium storing a control program which, when executed by a processor, implements the respective steps of the control method of an air conditioner according to any one of claims 1 to 8.
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