CN113959063A - Control method and control device of air conditioner and air conditioner - Google Patents
Control method and control device of air conditioner and air conditioner Download PDFInfo
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- CN113959063A CN113959063A CN202111354520.9A CN202111354520A CN113959063A CN 113959063 A CN113959063 A CN 113959063A CN 202111354520 A CN202111354520 A CN 202111354520A CN 113959063 A CN113959063 A CN 113959063A
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
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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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- 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
- F24F2110/20—Humidity
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method and a control device of an air conditioner and the air conditioner. The control method of the air conditioner comprises the following steps: the air conditioner comprises an indoor unit and an outdoor unit, wherein an auxiliary electric heating structure is arranged on the outdoor unit; the control method comprises the following steps: controlling the air conditioner to start and operate; acquiring outdoor environmental conditions of the air conditioner, wherein the outdoor environmental conditions comprise outdoor environmental temperature and outdoor environmental relative humidity; controlling the air conditioner to execute a defrosting condition according to the outdoor environmental condition; wherein the performing a defrosting action includes adjusting an operating state of the auxiliary electric heating structure. The invention solves the technical problem that in the prior art, an auxiliary electric heating control mode is rough and is difficult to accurately defrost an outdoor heat exchanger and prevent icing.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and a control device of an air conditioner and the air conditioner.
Background
When the air conditioner operates in heating mode, when the outdoor environment temperature is low, water vapor in the air can form condensed water on the outdoor heat exchanger to be separated out and frosted. When the condensed water is lower than 0 ℃, the condensed water can be gradually frozen, and the service performance of the air conditioner is seriously influenced.
In view of the above problems, although air conditioner manufacturers may add an auxiliary electric heating device to the air conditioner to improve the heating effect, the control method of the auxiliary electric heating of the existing air conditioner is rough, for example, some manufacturers only set the on or off of the auxiliary electric heating by recognizing the outdoor environment temperature, but do not recognize the influence of the outdoor environment humidity on the frosting or icing of the heat exchanger.
Disclosure of Invention
The invention solves the technical problem that in the prior art, an auxiliary electric heating control mode is rough and is difficult to accurately defrost an outdoor heat exchanger and prevent icing.
In order to solve the above problems, the present invention provides a control method of an air conditioner including an auxiliary electric heating structure, the control method including: controlling the air conditioner to start and operate; acquiring outdoor environmental conditions of the air conditioner, wherein the outdoor environmental conditions comprise outdoor environmental temperature and outdoor environmental relative humidity; controlling the air conditioner to execute defrosting action according to the outdoor environmental condition; wherein the performing a defrosting action includes adjusting an operating state of the auxiliary electric heating structure.
Compared with the prior art, the technical scheme has the following technical effects: in combination with the actual use environment of the air conditioner, the higher the relative humidity of the outdoor environment is, the higher the water vapor content in the air is, so that the outdoor environment condition in the technical scheme is taken as the basis for adjusting the operation state of the auxiliary electric heating structure, on one hand, the air conditioner can make an accurate response to the actual outdoor low-temperature environment, and the phenomenon that the outdoor heat exchanger of the air conditioner frosts to cause the indoor heating effect to be poor is avoided, so that the use experience of a user is influenced; on the other hand, for example, the auxiliary electric heating structure is turned on or off in accordance with the outdoor environmental conditions, thereby avoiding the increase in power consumption of the air conditioner due to the continuous turning on and the reduction in the service life of the auxiliary electric heating structure.
In one example of the present invention, when the operation mode of the air conditioner is a heating mode, the controlling the air conditioner to perform a defrosting action according to the outdoor environmental condition includes: when the T1 is less than or equal to a and the R is more than or equal to b1, controlling the auxiliary electric heating structure to be continuously opened; wherein T1 is the outdoor environment temperature, R is the outdoor environment relative humidity, and a and b1 are preset values respectively.
Compared with the prior art, the technical scheme has the following technical effects: and further, under the condition that the relative humidity of the outdoor environment of the air conditioner is high, the auxiliary electric heating structure is kept in a continuously opened state, so that a large amount of frost is prevented from being formed on a heat exchanger of the outdoor unit, and the heating effect is influenced.
In one example of the present invention, the controlling the air conditioner to perform a defrosting action according to the outdoor environmental condition further includes: when T1 is less than or equal to a and R is less than b1, the auxiliary electric heating structure is controlled to be turned on intermittently; or when T1 is more than a and R is more than or equal to b2, the auxiliary electric heating structure is controlled to be turned on intermittently; wherein b2 is a preset value, and b1 is more than b 2; wherein the smaller R, the shorter the time for which the auxiliary electric heating structure is continuously operated.
Compared with the prior art, the technical scheme has the following technical effects: the running state of the auxiliary electric heating structure is further adjusted by combining with the actual outdoor environment condition, so that the running state of the auxiliary electric heating structure is reasonably adjusted on the premise of ensuring the defrosting effect, for example, the auxiliary electric heating structure is discontinuously opened under the scene that the outdoor environment has low relative humidity, so that the energy-saving effect is achieved and the service life of the auxiliary electric heating structure is prolonged.
In one example of the present invention, the controlling the air conditioner to perform a defrosting action according to the outdoor environmental condition further includes: when T1 > a and R < b2, the auxiliary electric heating structure is controlled to stop running.
Compared with the prior art, the technical scheme has the following technical effects: when the actual operation environment of the air conditioner is combined, for example, when R is defined to be less than b2, when the relative humidity of the outdoor environment is low enough to cause difficult frosting on the heat exchanger of the outdoor unit or only a small amount of frosting is formed, the auxiliary electric heating structure does not need to be started, so that the energy-saving effect is achieved and the service life of the auxiliary electric heating structure is prolonged.
In one example of the present invention, the air conditioner includes an outdoor unit and an indoor unit; the controlling the air conditioner to perform a defrosting action includes: and controlling and adjusting the running frequency of the compressor and/or the rotating speed of the outdoor fan and/or the rotating speed of the indoor fan and/or the opening degree of the electronic expansion valve to execute the defrosting action.
Compared with the prior art, the technical scheme has the following technical effects: the defrosting efficiency is further improved, for example, the frosting condition is further prevented from happening in the heating mode, so that the heating effect is improved, and the use experience of a user is improved.
In one example of the invention, the controlling the air conditioner to perform the defrosting action comprises controlling and adjusting the opening degree of an electronic expansion valve to perform the defrosting action; and the opening degree of the electronic expansion valve is adjusted according to the temperature of the coil pipe of the heat exchanger of the outdoor unit.
Compared with the prior art, the technical scheme has the following technical effects: the defrosting efficiency is further improved, for example, the frosting condition is further prevented from happening in the heating mode, so that the heating effect is improved, and the use experience of a user is improved.
In an example of the present invention, when the operation mode is a defrosting mode, the controlling the air conditioner to perform a defrosting action according to the outdoor environmental condition includes: controlling the auxiliary electric heating structure to start and operate; and if the defrosting mode is finished, controlling the auxiliary electric heating structure to continuously operate for a first preset time.
Compared with the prior art, the technical scheme has the following technical effects: the air conditioner can be fully defrosted in the defrosting mode, and the problem that the heating effect is low due to incomplete defrosting when the air conditioner enters the heating mode is solved.
In one example of the present invention, the first preset time is adjusted according to the outdoor environmental condition.
Compared with the prior art, the technical scheme has the following technical effects: specifically, when the outdoor environment temperature is higher, the auxiliary electric heating structure can be controlled to continuously operate for a first preset time, so that the energy consumption is prevented from being increased and the service life is shortened due to long-time continuous opening; in addition, the first preset time can be shortened according to the lower relative humidity of the outdoor environment, and in combination with practical situations, when the relative humidity of the outdoor environment is lower, the frosting of the heat exchanger of the outdoor unit is less likely to occur, so that the first preset time can be shortened properly, and the defrosting requirement can be met.
In another aspect, the present invention also provides a control apparatus of an air conditioner including an auxiliary electric heating structure, the control apparatus including: the first control module is used for controlling the air conditioner to start and operate; the acquisition module is used for acquiring the outdoor environmental conditions of the air conditioner; wherein the outdoor environmental conditions include an outdoor ambient temperature and an outdoor ambient relative humidity; the second control module is used for controlling the air conditioner to execute defrosting action according to the outdoor environmental condition; wherein the performing a defrosting action includes adjusting an operating state of the auxiliary electric heating structure.
Compared with the prior art, the technical scheme has the following technical effects: the technical effects corresponding to any one of the above technical solutions can be achieved, and are not described herein again.
In still another aspect, the present invention also provides an air conditioner including: a computer-readable storage medium and a processor storing a computer program which, when read and executed by the processor, implements a control scheme as in any of the examples above.
Compared with the prior art, the technical scheme has the following technical effects: the technical effects of the control method according to any one of the above embodiments can be achieved, and are not described herein again.
After the technical scheme of the invention is adopted, the following technical effects can be achieved:
(1) the air conditioner can accurately react to the actual outdoor low-temperature environment, and the phenomenon that the indoor heating effect is poor due to frosting of an outdoor heat exchanger of the air conditioner is avoided, so that the use experience of a user is influenced;
(2) the efficiency of defrosting under the defrosting mode is further improved, for example, the condition of frosting is further prevented under the heating mode, so that the heating effect is improved, and the use experience of a user is improved.
Drawings
Fig. 1 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
Fig. 2 is a block diagram of a control device according to a second embodiment of the present invention.
Description of reference numerals:
100-a control device; 110-a first control module; 120-an acquisition module; 130-a second control module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The first embodiment is as follows:
referring to fig. 1, a flowchart of a control method of an air conditioner according to an embodiment of the present invention is shown. The air conditioner includes, for example, an auxiliary electric heating structure, and the control method includes, for example:
s1: controlling the air conditioner to start and operate;
s2: acquiring outdoor environmental conditions of the air conditioner, wherein the outdoor environmental conditions comprise outdoor environmental temperature and outdoor environmental relative humidity;
in a specific embodiment, in a low-temperature environment, the air conditioner needs to be controlled to enter a heating mode for operation, because the outdoor environment temperature is low, water vapor in the air is easy to form condensed water on the outdoor heat exchanger to separate out and frost, but when the temperature of the condensed water is lower than 0 ℃, the condensed water is gradually frozen, so that the use performance of the air conditioner is seriously affected. Specifically, in a low-temperature environment with the same temperature, as the humidity in the air is higher, the higher the water vapor content in the air is, the higher the possibility of ice blockage of the heat exchanger of the outdoor unit is, and therefore, in order to enable the auxiliary electric heating structure to enable the air conditioner to normally heat in the low-temperature environment, the specific situation of the relative humidity of the outdoor environment needs to be combined to accurately achieve defrosting and defrosting of the air conditioner.
S3: controlling the air conditioner to execute defrosting action according to the outdoor environmental condition; wherein the performing of the defrosting action includes adjusting an operating state of the auxiliary electric heating structure.
In an embodiment, in combination with the above-mentioned embodiments, energy saving needs to be achieved on the premise of ensuring defrosting and defrosting. It can be understood that, on one hand, the long-time continuous opening of the auxiliary electric heating structure increases energy consumption, causes electric load of a user, and shortens the service life of the auxiliary electric heating structure; on the other hand, although the outdoor environment temperature is less than 0 ℃, when the outdoor environment relative humidity is lower, the frosting phenomenon on the outdoor machine heat exchanger is not easy to occur, and further the icing condition is not easy to occur, so that the auxiliary electric heating structure is not required to be controlled to be continuously opened, and the energy consumption is wasted; for example, when the outdoor temperature is lower than 0 ℃ and the outdoor relative humidity is high, the possibility of frosting and icing on the heat exchanger of the outdoor unit is increased, so that the normal heating effect of the air conditioner is seriously affected, and therefore, under the environmental factor, the auxiliary electric heating structure needs to be controlled to be continuously opened, so that the frosting and icing can be timely performed. It can be understood that the outdoor environment relative humidity is an indispensable consideration in order to enable the air conditioner to normally perform heating operation in a low temperature environment.
Preferably, the outdoor environment temperature can be recorded as T1, and the outdoor environment relative humidity can be recorded as R, wherein the outdoor environment relative humidity can be understood as the ratio of the water vapor pressure in the air to the saturated water vapor pressure. When the operation mode of the air conditioner is a heating mode, controlling the air conditioner to perform defrosting action according to the outdoor environment condition comprises the following steps:
when T1 is less than or equal to a and R is more than or equal to b1, controlling the auxiliary electric heating structure to be continuously opened; wherein a and b1 are preset values respectively. For example, the critical temperature of water condensation and ice formation is 0 ℃, so that, for example, a is 0 ℃, and b1 is 80%, that is, when T1 is less than or equal to 0 ℃ and R is greater than or equal to 80%, it can be determined that the air is rich in a large amount of water vapor, condensed water is easily formed on the heat exchanger of the outdoor unit to separate out and freeze, and then the auxiliary electric heating structure can be continuously opened to avoid frost accumulation to influence the use performance of the air conditioner.
In one embodiment, three temperature sensing devices, namely a dry bulb thermometer for detecting the temperature of the outdoor environment, a wet bulb thermometer for detecting the humidity of the outdoor environment and a first thermometer for detecting the temperature of a coil of an outdoor heat exchanger, can be arranged in the air conditioner. Therefore, the operation state of the auxiliary electric heating structure can be adjusted in real time through the detected outdoor environment temperature and outdoor environment relative humidity. Specifically, when outdoor fan rotated, can produce the negative pressure for outdoor air is inhaled the outer quick-witted wind cavity of air conditioner, then, is convenient for accurately acquire outdoor environment temperature and outdoor environment relative humidity, for example can set up dry bulb thermometer and wet bulb thermometer in off-premises station air intake department, can flow through above two thermometers of dry bulb and wet bulb when outdoor air inflows outdoor machine wind cavity, and then acquires outdoor environment temperature and outdoor environment relative humidity.
Preferably, the controlling the air conditioner to perform the defrosting action according to the outdoor environmental condition further includes:
when T1 is less than or equal to a and R is less than b1, the auxiliary electric heating structure is controlled to be turned on intermittently;
or when T1 is more than a and R is more than or equal to b2, the auxiliary electric heating structure is controlled to be turned on intermittently; wherein b2 is a preset value, and b1 is more than b 2; wherein the smaller R, the shorter the time for which the auxiliary electric heating structure is continuously operated.
In one embodiment, it can be understood that, when the air conditioner operates in the heating mode, in a low-temperature environment, as the relative humidity in the air is higher, the higher the risk of frost formation on the heat exchanger of the outdoor unit is, and correspondingly, the greater the frost accumulation amount is. Therefore, in order to ensure that the use performance of the air conditioner is normally released, the operation state of the auxiliary electric heating structure can be adjusted according to the outdoor environment temperature and the outdoor environment relative humidity, for example, the larger the outdoor environment relative humidity is, the longer the continuous operation time of the auxiliary electric heating structure can be controlled, and when the auxiliary electric heating structure is operated for a period of time, the auxiliary electric heating structure can be controlled to be closed, namely, the operation state of the auxiliary electric heating structure is periodically controlled, so that on one hand, the outdoor unit heat exchanger can be defrosted in time, and the frosting reduction effect is achieved; on the other hand, the increase of energy consumption caused by continuous operation of the auxiliary electric heating structure is avoided.
Further, for example, it is desirable that b2 be 50%, so that when T1 ≦ 0 ℃ and R is 50 ≦ R < 80%, the auxiliary electric heating structure may be controlled to be turned on and turned off for 5 minutes after every 60 minutes of operation, so that the outdoor heat exchanger is prevented from frosting and, in addition, the auxiliary electric heating structure can be reduced from operating for a long time, resulting in a shortened service life; and when the temperature T1 is less than or equal to 0 ℃ and the temperature R is less than 50%, controlling the auxiliary electric heating structure to be closed for 5 minutes and then opened after the auxiliary electric heating structure operates for 50 minutes. It can be understood that when T1 is less than or equal to 0 ℃, as R is smaller, the probability of frost formation on the heat exchanger of the outdoor unit is smaller, and accordingly, the accumulation amount of frost formation is smaller, so that the time for starting the auxiliary electric heating structure to operate is correspondingly reduced, that is, when R is smaller, the accumulation amount of frost formation by condensation and precipitation on the heat exchanger of the outdoor unit is smaller, and accordingly, the defrosting time of the auxiliary electric heating structure is shorter, so that on the premise that T1 is less than or equal to 0 ℃, the continuous operation time of the auxiliary electric heating structure only needs to be correspondingly adjusted according to the change of R so as to meet the defrosting requirement.
Further, for example, taking T1 > 0 ℃ and 50% ≦ R, the auxiliary electrical heating structure may be controlled to operate continuously for a shorter period of time as R decreases. Specifically, when T1 is more than 0 ℃ and R is more than or equal to 80%, the auxiliary electric heating structure can be controlled to be closed for 5 minutes after operating for 40 minutes. Because T1 is more than 0 ℃, compared with the outdoor environment temperature of T1 which is less than or equal to 0 ℃, the frost is not easy to form ice on the heat exchanger of the outdoor unit, and therefore, under the condition that T1 is more than or equal to 0 ℃, the time for controlling the auxiliary electric heating structure to be opened for continuous operation is less than the operation time under the corresponding condition that T1 is less than or equal to 0 ℃. For example, T1 > 0 deg.C can be selected, and R is 50% ≦ R < 80%, and the auxiliary electrical heating structure is controlled to be turned off for 5 minutes and then turned on after every 30 minutes of operation.
Preferably, the controlling the air conditioner to perform the defrosting action according to the outdoor environmental condition further includes: when T1 is more than a and R is less than b2, the auxiliary electric heating structure is controlled to stop running. For example, when T1 is greater than 0 ℃, and R is less than 50%, when the air conditioner operates in the heating mode, frost is not formed on the heat exchanger of the outdoor unit, and the auxiliary electric heating structure is not required to be opened naturally, so as to avoid causing the auxiliary electric heating structure to do useless work, increase the economic burden of the user when using the air conditioner, and shorten the service life of the auxiliary electric heating structure.
Preferably, the air conditioner includes, for example, an outdoor unit and an indoor unit; the controlling the air conditioner to perform the defrosting action comprises the following steps:
and controlling and adjusting the running frequency of the compressor and/or the rotating speed of the outdoor fan and/or the rotating speed of the indoor fan and/or the opening degree of the electronic expansion valve.
Furthermore, when the air conditioner operates in a heating mode, the operating frequency of the air conditioner can be reduced, the rotating speed of an outdoor fan can be increased, the rotating speed of an indoor fan can be reduced, and the opening of the electronic expansion valve can be increased according to outdoor environmental conditions.
Preferably, the controlling the air conditioner to perform the defrosting action comprises controlling and adjusting the opening degree of the electronic expansion valve to perform the defrosting action; the electronic expansion valve is adjusted to open according to the temperature of the coil pipe of the heat exchanger of the outdoor unit so as to execute defrosting action.
Specifically, the running frequency of the compressor can be reduced to improve the evaporation pressure of the air conditioner, so that the surface temperature of the heat exchanger of the outdoor unit is improved, and the frosting on the surface of the heat exchanger is reduced; the rotating speed of the indoor fan is reduced to reduce the air quantity supplied by the indoor fan, so that the heat exchange quantity of the indoor unit is reduced, the evaporation temperature of the air conditioner is further improved, and the aim of reducing frosting is fulfilled; the air supply quantity of the outdoor unit can be increased by means of increasing the rotating speed of the fan of the outdoor unit, so that the heat exchange quantity of the outdoor unit is increased, the evaporation temperature of the air conditioner is further increased, and the aim of reducing frosting is fulfilled; in addition, the opening degree of the electronic expansion valve of the outdoor unit can be properly increased to increase the flow rate of the refrigerant, so that the evaporation pressure of the air conditioner is increased, the surface temperature of the heat exchanger of the outdoor unit is further increased, and the effect of reducing frosting is achieved.
In a specific embodiment, the defrosting effect of the heat exchanger of the outdoor unit is improved, when T1 is less than or equal to 0 ℃ and R is greater than or equal to 80%, on one hand, the auxiliary electric heating structure can be controlled to keep an open state, and in addition, the operation frequency of the compressor can be quickly reduced to 75% of the current operation frequency, then the rotating speed of the indoor fan is quickly reduced to 75% of the current rotating speed, and then the rotating speed of the outdoor fan is increased to the highest wind level; in addition, the opening degree of the electronic expansion valve can be adjusted according to the temperature of the coil of the outdoor unit heat exchanger, specifically, the temperature of the coil is T2, and then if T2 is more than 0 ℃, the electronic expansion valve is controlled to increase the valve step of 10 degrees every 1 minute; if the temperature is not lower than 0 ℃ and not lower than T2 > -1 ℃, controlling the electronic expansion valve to increase the valve step of 5 degrees every 1 minute; and if the temperature is more than or equal to T2 ℃ at the temperature of-1 ℃, keeping the opening degree of the electronic expansion valve.
Specifically speaking, the coil temperature detected and obtained by the first thermometer needs to be the lowest temperature of the whole outdoor unit heat exchanger, and the situation that the air conditioner cannot enter a defrosting mode and the heating effect of the air conditioner is seriously influenced when the outdoor unit heat exchanger is fully frosted due to the fact that the detected coil temperature is not the lowest temperature when the air conditioner runs in a heating mode is avoided.
In another embodiment, when T1 is less than or equal to 0 ℃ and R is more than or equal to 50% and less than 80%, the operation frequency of the compressor can be controlled to be rapidly reduced to 80% of the current operation frequency, the rotating speed of the indoor fan is rapidly reduced to 80% of the current rotating speed, and the rotating speed of the outdoor fan is increased to 95% of the maximum rotating speed. And when the temperature T2 is more than 2 ℃, controlling and increasing the valve step of 10 degrees of the electronic expansion valve every 1 minute, if the temperature T2 is more than or equal to 2 ℃, increasing the valve step of 5 degrees of the electronic expansion valve every 1 minute, and if the temperature T2 is more than or equal to 1 ℃, keeping the current opening degree of the electronic expansion valve.
In another embodiment, when T is less than or equal to 0 ℃ and R is less than 50%, the operation frequency of the compressor can be controlled to be reduced to 85% of the current operation frequency, the rotating speed of the indoor fan can be reduced to 85% of the current rotating speed, and the rotating speed of the outdoor fan can be increased to 90% of the maximum rotating speed. And when the temperature T2 is more than 4 ℃, controlling and increasing the valve step of 10 degrees of the electronic expansion valve every 1 minute, if the temperature T2 is more than or equal to 4 ℃, increasing the valve step of 5 degrees of the electronic expansion valve every 1 minute, and if the temperature T2 is more than or equal to 3 ℃, keeping the current opening degree of the electronic expansion valve.
In another embodiment, when T is more than 0 ℃ and R is more than or equal to 80%, the operation frequency of the compressor can be controlled to be rapidly reduced to 90% of the current operation frequency, the rotating speed of the indoor fan is rapidly reduced to 90% of the current rotating speed, and the rotating speed of the outdoor fan is increased to 85% of the maximum rotating speed. And when the temperature T2 is more than 6 ℃, controlling and increasing the valve step of 10 degrees of the electronic expansion valve every 1 minute, if the temperature T2 is more than or equal to 6 ℃, increasing the valve step of 5 degrees of the electronic expansion valve every 1 minute, and if the temperature T2 is more than or equal to 5 ℃, keeping the current opening degree of the electronic expansion valve.
In another embodiment, when T is more than 0 ℃ and R is more than or equal to 50% and less than 80%, the operation frequency of the compressor can be controlled to be rapidly reduced to 95% of the current operation frequency, the rotating speed of the indoor fan can be rapidly reduced to 95% of the current rotating speed, and the rotating speed of the outdoor fan can be increased to 80% of the maximum rotating speed. And when the temperature T2 is more than 8 ℃, controlling and increasing the valve step of 10 degrees of the electronic expansion valve every 1 minute, if the temperature T2 is more than or equal to 8 ℃, increasing the valve step of 5 degrees of the electronic expansion valve every 1 minute, and if the temperature T2 is more than or equal to 7 ℃, keeping the current opening degree of the electronic expansion valve.
In another embodiment, when T is more than 0 ℃ and R is less than 50%, the operation frequency of the compressor, the rotating speed of the indoor fan, the rotating speed of the outdoor fan and the opening degree of the electronic expansion valve can be controlled to be kept unchanged.
Preferably, when the operation mode of the air conditioner is the defrosting mode, the controlling the air conditioner to perform the defrosting operation according to the outdoor condition includes:
controlling the auxiliary electric heating structure to start and operate;
and if the defrosting mode is finished, controlling the auxiliary electric heating structure to continuously run for a first preset time.
Particularly, when the outdoor unit of the air conditioner is fully frosted, the heat exchange capacity of the air conditioner is greatly reduced, so that the use comfort of a user is influenced, and at the moment, defrosting control needs to be carried out on the frosted layer of the heat exchanger of the outdoor unit, namely, the running defrosting mode of the air conditioner needs to be controlled.
It should be noted that when the air conditioner enters the defrosting mode, the frost layer is melted into water and is discharged through the chassis drain hole, but if the chassis drain hole is blocked by the ice layer, the water cannot be discharged, and when the outdoor environment temperature is low, the water accumulated on the chassis is accelerated to frost into ice, which further affects the heating capacity of the air conditioner. Therefore, it is necessary to make the first thermometer detect that T2 is too low, so that when the preset temperature is met, that is, when the air conditioner meets the requirement of defrosting, the air conditioner needs to be controlled to operate in the defrosting mode.
Preferably, the first preset time may be adjusted according to outdoor environmental conditions.
Preferably, the air conditioner is controlled to be switched from the defrosting mode to the heating mode according to the outdoor environmental condition, and the defrosting action is operated.
Further, when the air conditioner operates in the defrosting mode, when R remains unchanged, the smaller T1, the longer the auxiliary electric heating structure needs to be controlled to operate continuously for the first preset time, so as to sufficiently dissolve the ice on the chassis; in addition, when T1 is kept constant, the smaller R, the shorter the time for which the auxiliary electric heating structure needs to be controlled to continuously operate for the first preset time.
Specifically, in the defrosting mode of the air conditioner, when T is less than or equal to 0 ℃ and R is greater than or equal to 80%, the auxiliary electric heating structure is controlled to be started, whether T2 meets the preset temperature or not is judged, and if the T2 meets the preset temperature, the auxiliary electric heating structure is controlled to continue to operate for 6 minutes to ensure that the ice on the chassis of the outdoor unit heat exchanger is completely melted. At this time, whether the air conditioner operates in the heating mode is controlled according to the current outdoor environmental condition.
For example, in the defrosting mode of the air conditioner, when T is less than or equal to 0 ℃ and R is greater than or equal to 50% and less than 80%, the auxiliary electric heating structure is controlled to be turned on, and at this time, T2 is at a preset temperature, and if the preset temperature is met, the auxiliary electric heating structure is controlled to continue to operate for 5 minutes, so as to ensure that the ice on the chassis of the outdoor unit heat exchanger is completely melted. At this time, whether the air conditioner operates in the heating mode is controlled according to the current outdoor environmental condition. Correspondingly, when T is less than or equal to 0 ℃ and R is less than 50%, when T2 meets the preset temperature, namely after defrosting is finished, the auxiliary electric heating structure is controlled to continuously operate for 4 minutes; when T is more than 0 ℃ and R is more than or equal to 80%, when T2 meets the preset temperature at the moment, namely after defrosting is finished at the moment, controlling the auxiliary electric heating structure to continuously operate for 3 minutes; when T is more than 0 ℃ and R is more than or equal to 50% and less than 80%, if T2 meets the preset temperature, namely after defrosting is finished, controlling the auxiliary electric heating structure to continuously operate for 2 minutes; and when the T is more than 0 ℃ and the R is less than 80%, if the T2 meets the preset temperature at the moment, namely after the defrosting is finished at the moment, controlling the auxiliary electric heating structure to continuously operate for 1 minute.
Further, after the air conditioner exits the defrosting mode, T1 and R at this time are obtained, if T1 is not more than 0 ℃ and R is not less than 80%, the control means corresponding to the above embodiment may be executed, for example, the auxiliary electric heating structure may be controlled to keep an on state, in addition, the operation frequency of the compressor may be rapidly reduced to 75% of the current operation frequency, the rotation speed of the indoor fan may be rapidly reduced to 75% of the current rotation speed, and the rotation speed of the outdoor fan may be increased to the highest wind level; in addition, the opening degree of the electronic expansion valve can be adjusted according to the temperature of the coil of the outdoor unit heat exchanger, specifically, the temperature of the coil is T2, and then if T2 is more than 0 ℃, the electronic expansion valve is controlled to increase the valve step of 10 degrees every 1 minute; if the temperature is not lower than 0 ℃ and not lower than T2 > -1 ℃, controlling the electronic expansion valve to increase the valve step of 5 degrees every 1 minute; and if the temperature is more than or equal to T2 ℃ at the temperature of-1 ℃, keeping the opening degree of the electronic expansion valve. When the air conditioner operates in the heating mode, the phenomenon of secondary frosting on the heat exchanger of the outdoor unit is avoided, and the normal operation of the air conditioner in the heating mode is ensured.
Of course, if T1 is greater than 0 ℃ and R is greater than or equal to 80%, the air conditioner may be controlled to execute the control means corresponding to the above embodiments, such as reducing the operating frequency of the compressor to 90% of the current operating frequency, rapidly reducing the rotating speed of the indoor fan to 90% of the current rotating speed, and increasing the rotating speed of the outdoor fan to 85% of the maximum rotating speed. And when the temperature T2 is more than 6 ℃, controlling and increasing the valve step of 10 degrees of the electronic expansion valve every 1 minute, if the temperature T2 is more than or equal to 6 ℃, increasing the valve step of 5 degrees of the electronic expansion valve every 1 minute, and if the temperature T2 is more than or equal to 5 ℃, keeping the current opening degree of the electronic expansion valve. When T1 and R take other values, the same corresponds to the above embodiments, and the details are not repeated herein.
Example two:
referring to fig. 2, it is a block diagram of a control device 100 of an air conditioner according to a second embodiment of the present invention. The control device 100 includes, for example: a first control module 110, an acquisition module 120, and a second control module 130. The first control module 110 is used for controlling the air conditioner to start and operate; the obtaining module 120 is configured to obtain an outdoor environmental condition where the air conditioner is located; the second control module 130 is used for controlling the air conditioner to perform defrosting action according to the outdoor environmental condition; wherein the performing of the defrosting action includes adjusting an operating state of the auxiliary electric heating structure.
Example three:
an embodiment of the present invention provides an air conditioner, for example, the air conditioner includes a computer readable storage medium storing a computer program and a processor, and the computer program is read by the processor and executed to implement the control method according to the first embodiment.
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 (10)
1. A control method of an air conditioner, the air conditioner includes an auxiliary electric heating structure; the control method is characterized by comprising the following steps:
controlling the air conditioner to start and operate;
acquiring outdoor environmental conditions of the air conditioner, wherein the outdoor environmental conditions comprise outdoor environmental temperature and outdoor environmental relative humidity;
controlling the air conditioner to execute defrosting action according to the outdoor environmental condition; wherein the performing a defrosting action includes adjusting an operating state of the auxiliary electric heating structure.
2. The control method according to claim 1,
when the operation mode of the air conditioner is a heating mode, the controlling the air conditioner to execute a defrosting action according to the outdoor environment condition comprises the following steps:
when the T1 is less than or equal to a and the R is more than or equal to b1, controlling the auxiliary electric heating structure to be continuously opened;
wherein T1 is the outdoor environment temperature, R is the outdoor environment relative humidity, and a and b1 are preset values respectively.
3. The control method of claim 2, wherein said controlling the air conditioner to perform a defrosting action according to the outdoor environmental condition further comprises:
when T1 is less than or equal to a and R is less than b1, the auxiliary electric heating structure is controlled to be turned on intermittently;
or when T1 is more than a and R is more than or equal to b2, the auxiliary electric heating structure is controlled to be turned on intermittently; wherein b2 is a preset value, and b1 is more than b 2;
wherein the smaller R, the shorter the time for which the auxiliary electric heating structure is continuously operated.
4. The control method of claim 3, wherein said controlling the air conditioner to perform a defrosting action according to the outdoor environmental condition further comprises:
when T1 > a and R < b2, the auxiliary electric heating structure is controlled to stop running.
5. The control method according to any one of claims 1 to 4, wherein the air conditioner includes an outdoor unit and an indoor unit; the controlling the air conditioner to perform a defrosting action includes:
and controlling and adjusting the running frequency of the compressor and/or the rotating speed of the outdoor fan and/or the rotating speed of the indoor fan and/or the opening degree of the electronic expansion valve to execute the defrosting action.
6. The control method according to any one of claims 1 to 4, wherein the controlling the air conditioner to perform a defrosting action includes controlling to adjust an opening degree of an electronic expansion valve to perform the defrosting action;
and the opening degree of the electronic expansion valve is adjusted according to the temperature of the coil pipe of the heat exchanger of the outdoor unit.
7. The control method according to claim 1, wherein when the operation mode of the air conditioner is a defrosting mode, the controlling the air conditioner to perform a defrosting action according to the outdoor environmental condition comprises:
controlling the auxiliary electric heating structure to start and operate;
and if the defrosting mode is finished, controlling the auxiliary electric heating structure to continuously operate for a first preset time.
8. The control method according to claim 7,
and adjusting the first preset time according to the outdoor environmental condition.
9. A control apparatus of an air conditioner, the air conditioner including an auxiliary electric heating structure; characterized in that the control device comprises:
the first control module (110) is used for controlling the air conditioner to start to operate;
an acquisition module (120) for acquiring an outdoor environmental condition where the air conditioner is located; wherein the outdoor environmental conditions include an outdoor ambient temperature and an outdoor ambient relative humidity;
a second control module (130) for controlling the air conditioner to perform a defrosting action according to the outdoor environmental condition; wherein the performing a defrosting action includes adjusting an operating state of the auxiliary electric heating structure.
10. An air conditioner, comprising:
computer-readable storage medium and processor storing a computer program which, when read and executed by the processor, implements the control method according to any one of claims 1 to 8.
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