CN111380174A - Control method and device of air conditioner, air conditioner and medium - Google Patents
Control method and device of air conditioner, air conditioner and medium Download PDFInfo
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- CN111380174A CN111380174A CN202010231448.XA CN202010231448A CN111380174A CN 111380174 A CN111380174 A CN 111380174A CN 202010231448 A CN202010231448 A CN 202010231448A CN 111380174 A CN111380174 A CN 111380174A
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0071—Indoor units, e.g. fan coil units with means for purifying 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
- F24F11/70—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
Abstract
The invention discloses a control method and a control device of an air conditioner, the air conditioner and a medium, wherein the method comprises the following steps: acquiring a threshold temperature of an indoor evaporator of the air conditioner, a current temperature of the indoor evaporator, an outdoor frequency limiting value of the air conditioner, a first threshold of the air conditioner, a second threshold of the air conditioner and a preset condition value of the air conditioner; adjusting the rotating speed of an indoor fan of the air conditioner and the operating frequency of an outdoor compressor according to the difference value between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator; acquiring an outdoor operation value of the air conditioner; when the outdoor operation value is larger than the second threshold value, controlling the operation frequency of the outdoor compressor to be reduced by the first frequency reduction amplitude value and the first frequency reduction period; and when the outdoor operation value is smaller than the preset condition value, controlling the operation frequency of the outdoor compressor to be reduced by the second frequency reduction amplitude value and the second frequency reduction period. According to the control method of the air conditioner, when the outdoor frequency limiting occurs, the condition that the system is unstable can be avoided.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner, a control device of the air conditioner based on the control method of the air conditioner, the air conditioner with the control device of the air conditioner and a non-transitory computer readable storage medium.
Background
The temperature of the indoor evaporator of the air conditioner reaches a certain value and lasts for a certain time, so that viruses can be killed, bacteria can be killed, the interior of the air conditioner is relatively clean, and the indoor air is relatively healthy. However, when the temperature of the indoor evaporator reaches a high temperature, the outdoor compressor may operate at a high frequency, and at the same time, due to the influence of factors such as system pressure, the outdoor exhaust temperature, the outdoor condenser temperature, the current and the voltage may reach high values, which may cause the frequency of the outdoor compressor to be limited or stop operating, and the temperature of the indoor evaporator may not reach a preset target temperature value, which may not achieve the purpose of killing viruses and bacteria.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a control method of an air conditioner, which can avoid system instability caused by frequency limiting protection.
The invention also provides a control device of the air conditioner based on the control method of the air conditioner.
The invention also provides an air conditioner with the control device of the air conditioner.
The invention also proposes a non-transitory computer-readable storage medium.
A control method of an air conditioner according to an embodiment of a first aspect of the present invention includes:
acquiring a threshold temperature of an indoor evaporator of the air conditioner, a current temperature of the indoor evaporator, an outdoor frequency limiting value of the air conditioner, a first threshold of the air conditioner, a second threshold of the air conditioner and a preset condition value of the air conditioner, wherein the second threshold is less than or equal to the outdoor frequency limiting value, the first threshold is less than the second threshold, and the preset condition value is less than the second threshold;
adjusting the rotating speed of an indoor fan of the air conditioner and the operating frequency of the outdoor compressor according to the difference value between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator;
acquiring an outdoor operation value of the air conditioner;
when the outdoor operation value is greater than the first threshold value and less than the second threshold value, keeping the operation frequency of the outdoor compressor unchanged;
when the outdoor operation value is larger than the second threshold value, controlling the operation frequency of the outdoor compressor to be reduced by a first frequency reduction amplitude and a first frequency reduction period;
and when the outdoor operation value is smaller than the preset condition value, controlling the operation frequency of the outdoor compressor to decrease by a second frequency reduction amplitude and a second frequency reduction period, wherein the comprehensive frequency reduction speed of the first frequency reduction amplitude and the first frequency reduction period is greater than the comprehensive frequency reduction speed of the second frequency reduction amplitude and the second frequency reduction period.
According to the control method of the air conditioner, when the outdoor frequency limiting occurs, the situation of unstable system caused by rapid frequency reduction due to frequency limiting protection can be avoided by adjusting the descending amplitude and the descending period of the operating frequency of the outdoor compressor.
In addition, the control method of the air conditioner according to the embodiment of the present invention has the following additional technical features:
according to some embodiments of the invention, the outdoor frequency limiting value comprises one of an outdoor discharge temperature frequency limiting value, an outdoor condenser temperature frequency limiting value, a current frequency limiting value, and a voltage frequency limiting value, and the outdoor operation value comprises one of an outdoor discharge temperature operation value, an outdoor condenser temperature operation value, a current operation value, and a voltage operation value corresponding to the outdoor frequency limiting value.
According to some embodiments of the invention, the preset condition value is obtained according to the following formula:
f2 is k × F1, F2 is the preset condition value, F1 is the operating frequency of the outdoor compressor before the start of frequency reduction, and k is the preset frequency reduction coefficient.
According to some embodiments of the invention, the preset condition value is a corresponding parameter value when the outdoor limited frequency signal is released.
According to some embodiments of the invention, the first downconversion amplitude is greater than the second downconversion amplitude, the first downconversion period being less than the second downconversion period.
According to some embodiments of the present invention, the control method of the air conditioner further comprises:
acquiring a third threshold value of the air conditioner, wherein the third threshold value is smaller than the preset condition value;
and when the outdoor operation value is smaller than the third threshold value, controlling the operation frequency of the outdoor compressor to rise by the frequency rising amplitude value and the frequency rising period.
According to some embodiments of the present invention, when the current temperature of the indoor evaporator is less than the threshold temperature of the indoor evaporator, the rotation speed of the indoor fan is decreased by an adjustment amplitude K1 and an adjustment period T1 and/or the operation frequency of the outdoor compressor is increased by an adjustment amplitude K2 and an adjustment period T2 according to a difference between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator;
increasing the rotation speed of the indoor fan by adjusting a magnitude K3 and an adjustment period T3 and/or decreasing the operating frequency of the outdoor compressor by adjusting a magnitude K3 and an adjustment period T3 according to a difference between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator when the current temperature of the indoor evaporator is greater than the threshold temperature of the indoor evaporator.
According to a second aspect of the present invention, the control device of the air conditioner based on the control method of the air conditioner according to the first aspect of the present invention includes: the evaporator temperature acquisition module is used for acquiring the current temperature of the indoor evaporator; the frequency limit detection module is used for acquiring the outdoor operation value; the fan module is used for executing the rotating speed of the indoor fan; a compressor module for executing an operating frequency of the outdoor compressor; the control module is respectively communicated with the evaporator temperature acquisition module, the frequency limiting detection module, the fan module and the compressor module, and adjusts the rotating speed of the indoor fan and the operating frequency of the outdoor compressor according to the difference value between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator;
when the outdoor operation value is greater than the first threshold value and less than the second threshold value, the control module keeps the operation frequency of the outdoor compressor unchanged;
when the outdoor operation value is larger than the second threshold value, the control module controls the operation frequency of the outdoor compressor to be reduced by a first frequency reduction amplitude and a first frequency reduction period;
and when the outdoor operation value is smaller than the preset condition value, the control module controls the operation frequency of the outdoor compressor to be reduced by a second frequency reduction amplitude and a second frequency reduction period.
According to the control device of the air conditioner, the condition that the system is unstable due to the fact that the frequency is rapidly reduced due to frequency limiting protection can be avoided.
The air conditioner according to the third aspect of the present invention includes an indoor evaporator, an indoor fan, an outdoor compressor, and the control device of the air conditioner according to the second aspect of the present invention.
According to the air conditioner provided by the embodiment of the invention, the control device of the air conditioner can avoid the condition of unstable system caused by rapid frequency reduction due to frequency limit protection.
A non-transitory computer-readable storage medium according to a fourth aspect embodiment of the present invention has stored thereon a computer program that, when executed by a processor, implements a control method of an air conditioner according to the first aspect embodiment of the present invention.
According to the non-transitory computer readable storage medium of the embodiment of the invention, the condition that the frequency is rapidly reduced due to frequency limiting protection to cause system instability can be avoided.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a flowchart of a control method 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 an embodiment of the present invention;
fig. 3 is a schematic diagram of a control apparatus of an air conditioner according to an embodiment of the present invention.
Reference numerals:
the air conditioner comprises a control device 1 of the air conditioner, an evaporator temperature acquisition module 10, a frequency limiting detection module 20, a fan module 30, a compressor module 40 and a control module 50.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A control method of an air conditioner according to an embodiment of the first aspect of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a control method of an air conditioner according to an embodiment of the present invention includes:
the method comprises the steps of obtaining a threshold temperature of an indoor evaporator of the air conditioner, a current temperature of the indoor evaporator, an outdoor frequency limiting value of the air conditioner, a first threshold of the air conditioner, a second threshold of the air conditioner and a preset condition value of the air conditioner, wherein the second threshold is smaller than or equal to the outdoor frequency limiting value, the first threshold is smaller than the second threshold, and the preset condition value is smaller than the second threshold.
Specifically, the outdoor frequency limit value may include one of an outdoor discharge temperature frequency limit value, an outdoor condenser temperature frequency limit value, a current frequency limit value, and a voltage frequency limit value, and the frequency limit value that occurs first may be used as the outdoor frequency limit value during the operation of the air conditioner.
In addition, the preset condition value may be obtained according to the following formula:
f2 is k × F1, F2 is the preset condition value, F1 is the operating frequency of the outdoor compressor before the start of frequency reduction, and k is the preset frequency reduction coefficient. Or, the preset condition value may be a corresponding parameter value when the outdoor frequency limiting signal is released.
And adjusting the rotating speed of an indoor fan of the air conditioner and the operating frequency of an outdoor compressor according to the difference value between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator. That is, when the current temperature of the indoor evaporator is not equal to the threshold temperature of the indoor evaporator, the rotation speed of the indoor fan and the operation frequency of the outdoor compressor are adjusted.
Specifically, it is determined whether the current temperature of the indoor evaporator is greater than a threshold temperature of the indoor evaporator:
if the current temperature of the indoor evaporator is less than the threshold temperature of the indoor evaporator, decreasing the rotation speed of the indoor fan and/or increasing the operating frequency of the outdoor compressor according to the difference between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator, for example, decreasing the rotation speed of the indoor fan by adjusting the amplitude K1 and the adjustment period T1, increasing the operating frequency of the outdoor compressor by adjusting the amplitude K2 and the adjustment period T2;
if the current temperature of the indoor evaporator is greater than the threshold temperature of the indoor evaporator, the rotational speed of the indoor fan is increased and/or the operating frequency of the outdoor compressor is decreased according to the difference between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator, for example, the rotational speed of the indoor fan is increased for an adjustment amplitude K3 and an adjustment period T3, and the operating frequency of the outdoor compressor is decreased for an adjustment amplitude K3 and an adjustment period T3.
It is understood that the adjusting amplitude and the adjusting period for adjusting the rotation speed of the indoor fan and the adjusting amplitude and the adjusting period for adjusting the operation frequency of the outdoor compressor may be the same or different. It should also be understood that "and/or" is used to indicate that one of the speed of the indoor fan and the operating frequency of the outdoor compressor can be adjusted, and that both the speed of the indoor fan and the operating frequency of the outdoor compressor can be adjusted.
An outdoor operation value of the air conditioner is acquired. The outdoor operation value may include one of an outdoor discharge air temperature operation value, an outdoor condenser temperature operation value, a current operation value, and a voltage operation value corresponding to the outdoor frequency limit value.
And when the outdoor operation value is smaller than the first threshold value, adjusting the operation frequency of the outdoor compressor by the adjusting amplitude and the adjusting period.
When the outdoor operation value is greater than the first threshold value and less than the second threshold value, the operation frequency of the outdoor compressor is kept unchanged, that is, the operation frequency of the outdoor compressor is kept not to be increased.
And when the outdoor operation value is greater than the second threshold value, sending a frequency limiting signal to control the operation frequency of the outdoor compressor to be reduced by the first frequency reduction amplitude and the first frequency reduction period.
And when the outdoor operating value is smaller than the preset condition value, controlling the operating frequency of the outdoor compressor to be reduced by a second frequency reduction amplitude and a second frequency reduction period, wherein the comprehensive frequency reduction speed of the first frequency reduction amplitude and the first frequency reduction period is greater than the comprehensive frequency reduction speed of the second frequency reduction amplitude and the second frequency reduction period. For example, the first downconversion amplitude is greater than the second downconversion amplitude, and the first downconversion period is less than the second downconversion period.
Therefore, the operation frequency of the outdoor compressor is controlled to be reduced to a frequency fast-reducing process by the first frequency-reducing amplitude and the first frequency-reducing period, and the operation frequency of the outdoor compressor is controlled to be reduced to a frequency slow-reducing process by the second frequency-reducing amplitude and the second frequency-reducing period.
According to the control method of the air conditioner, when the outdoor frequency limiting occurs, the situation of unstable system caused by rapid frequency reduction due to frequency limiting protection can be avoided by adjusting the descending amplitude and the descending period of the operating frequency of the outdoor compressor.
It should be understood that, in the above-mentioned process, the outdoor frequency limit value, the first threshold value, the second threshold value and the preset condition value of the air conditioner may also be obtained after the rotation speed of the indoor fan and the operating frequency of the outdoor compressor are adjusted, and a person skilled in the art may reasonably adjust the sequence of the above-mentioned process according to the specific implementation situation as long as the technical effect of the present invention can be achieved.
It should also be understood that the above-mentioned process of controlling the operation frequency of the outdoor compressor to be decreased by the first step-down amplitude and the first step-down period, and the process of controlling the operation frequency of the outdoor compressor to be decreased by the second step-down amplitude and the second step-down period may be respectively performed a plurality of times, each step-down amplitude and step-down period may be different, and the lower the operation frequency of the outdoor compressor, the slower the step-down speed may be. For example, the down-conversion process is divided into three processes, and the operation frequency of the outdoor compressor is controlled to be reduced to the first process by the first down-conversion amplitude and the first down-conversion period; when the outdoor operation value is smaller than the larger preset condition value, the operating frequency of the outdoor compressor is controlled to be reduced by the larger second frequency reduction amplitude and the smaller second frequency reduction period, which is the second process of frequency reduction; and when the outdoor operation value is smaller than the smaller preset condition value, controlling the operation frequency of the outdoor compressor to be reduced by using the smaller second frequency reduction amplitude and the larger second frequency reduction period.
As shown in fig. 2, according to some embodiments of the present invention, the control method of the air conditioner further includes:
acquiring a third threshold value of the air conditioner, wherein the third threshold value is smaller than a preset condition value;
and when the outdoor operation value is smaller than a third threshold value, sending a frequency limiting release signal to control the operation frequency of the outdoor compressor to rise by the frequency boosting amplitude value and the frequency boosting period.
In the related art, it is difficult to stabilize the temperature of the indoor evaporator at a temperature value, and the temperature is influenced by factors such as fluctuation of an air conditioning system, indoor and outdoor working condition change, and the response speed of the temperature of the indoor evaporator. To this end, according to some embodiments of the present invention, the control method of the air conditioner further includes:
in the starting stage, namely when the air conditioner enters a high-temperature disinfection function, a first target temperature of the indoor evaporator, a second target temperature of the indoor evaporator and a first initial frequency of the outdoor compressor are obtained, wherein the first target temperature of the indoor evaporator is smaller than the second target temperature of the indoor evaporator, and the second target temperature of the indoor evaporator is smaller than or equal to a threshold temperature of the indoor evaporator. For example, the first target temperature is 47 ℃ and the second target temperature is 56 ℃.
When the current temperature of the indoor evaporator is lower than the first target temperature of the indoor evaporator, the frequency sent to the outdoor compressor in the control room is the first initial frequency of the outdoor compressor, and the rotating speed of the indoor fan is controlled to be the preset low-wind-gear rotating speed.
And when the current temperature of the indoor evaporator is higher than the first target temperature of the indoor evaporator and lower than the second target temperature of the indoor evaporator, controlling the frequency sent to the outdoor compressor indoors to be a second initial frequency, wherein the second initial frequency is less than or equal to the first initial frequency.
Thus, in the initial stage of high-temperature disinfection, the frequency of sending the indoor air to the outdoor compressor is higher, so that the temperature of the indoor evaporator is increased at a higher speed; when the first target temperature is reached, the adjustment is performed at a second, slower initial frequency. Through the rapid heating process, the system enters a high-temperature disinfection stage more quickly.
According to some embodiments of the present invention, the control method of the air conditioner further comprises:
in the starting stage, a first target temperature of the indoor evaporator and a second target temperature of the indoor evaporator are obtained, the first target temperature of the indoor evaporator is smaller than the second target temperature of the indoor evaporator, and the second target temperature of the indoor evaporator is smaller than or equal to a threshold temperature of the indoor evaporator.
And increasing the frequency sent to the outdoor compressor indoors in a preset time period when the current temperature of the indoor evaporator is greater than the first target temperature of the indoor evaporator and less than the second target temperature of the indoor evaporator.
And when the current temperature of the indoor evaporator is higher than the second target temperature of the indoor evaporator, reducing the frequency sent to the outdoor compressor indoors in a preset time period.
Similarly, in the initial stage of high-temperature sterilization, the frequency of sending the indoor air to the outdoor compressor is higher, so that the temperature of the indoor evaporator is increased at a faster speed; when the first target temperature is reached, the adjustment is performed at a second, slower initial frequency. Through the rapid heating process, the system enters a high-temperature disinfection stage more quickly.
As shown in fig. 3, the control device of the air conditioner based on the control method of the air conditioner according to the embodiment of the first aspect of the present invention according to the second aspect of the present invention includes: the system comprises an evaporator temperature acquisition module 10, a frequency limiting detection module 20, a fan module 30, a compressor module 40 and a control module 50.
Specifically, the evaporator temperature acquisition module 10 is used to acquire the current temperature of the indoor evaporator. The limited frequency detection module 20 is used for acquiring an outdoor operation value. The fan module 30 is used to execute the rotation speed of the indoor fan. The compressor module 40 is used to implement the operating frequency of the outdoor compressor. The control module 50 is in communication with the evaporator temperature acquisition module 10, the frequency limiting detection module 20, the fan module 30, and the compressor module 40, respectively. The evaporator temperature collecting module 10 feeds back the collected current temperature of the indoor evaporator to the control module 50, and the limited frequency detecting module 20 collects corresponding parameter values of various outdoor limited frequency states and feeds back the collected outdoor operation values to the control module 50. For example, the control module 50 includes an indoor control module and an outdoor control module, the evaporator temperature collection module 10 is in communication with the indoor control module, and the frequency limit detection module 20 is in communication with the outdoor control module.
The control module 50 adjusts the speed of the indoor fan and the operating frequency of the outdoor compressor based on the difference between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator. That is, when the current temperature of the indoor evaporator is not equal to the threshold temperature of the indoor evaporator, the control module 50 adjusts the rotational speed of the indoor fan and the operating frequency of the outdoor compressor.
Specifically, the control module 50 determines whether the current temperature of the indoor evaporator is greater than a threshold temperature of the indoor evaporator:
if the current temperature of the indoor evaporator is less than the threshold temperature of the indoor evaporator, the control module 50 decreases the rotational speed of the indoor fan and/or increases the operating frequency of the outdoor compressor according to the difference between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator, e.g., the indoor control module decreases the rotational speed of the indoor fan by adjusting the amplitude K1 and the adjustment period T1, and the outdoor control module increases the operating frequency of the outdoor compressor by adjusting the amplitude K2 and the adjustment period T2;
if the current temperature of the indoor evaporator is greater than the threshold temperature of the indoor evaporator, the control module 50 increases the speed of the indoor fan and/or decreases the operating frequency of the outdoor compressor based on the difference between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator, e.g., the indoor control module increases the speed of the indoor fan at an adjustment amplitude K3 and an adjustment period T3, and the outdoor control module decreases the operating frequency of the outdoor compressor at an adjustment amplitude K3 and an adjustment period T3.
It is understood that the adjusting amplitude and the adjusting period for adjusting the rotation speed of the indoor fan and the adjusting amplitude and the adjusting period for adjusting the operation frequency of the outdoor compressor may be the same or different.
When the outdoor operation value is smaller than the first threshold value, the outdoor control module adjusts the operation frequency of the outdoor compressor according to the adjustment amplitude and the adjustment period.
When the outdoor operation value is greater than the first threshold value and less than the second threshold value, the outdoor control module keeps the operation frequency of the outdoor compressor unchanged, that is, keeps the operation frequency of the outdoor compressor from rising.
When the outdoor operation value is larger than the second threshold value, the outdoor control module sends a frequency limiting signal to the indoor control module within a preset time period, and the outdoor control module controls the operation frequency of the outdoor compressor to be reduced by the first frequency reduction amplitude value and the first frequency reduction period.
And when the outdoor operation value is smaller than the preset condition value, the outdoor control module controls the operation frequency of the outdoor compressor to be reduced by the second frequency reduction amplitude and the second frequency reduction period.
According to the control device of the air conditioner, the condition that the system is unstable due to the fact that the frequency is rapidly reduced due to frequency limiting protection can be avoided.
In some embodiments of the present invention, when the outdoor operation value is less than the third threshold value, the outdoor control module sends a frequency limitation release signal to the indoor control module, and the outdoor control module controls the operation frequency of the outdoor compressor to increase by the frequency increase amplitude and the frequency increase period.
The air conditioner according to the third aspect of the present invention includes an indoor evaporator, an indoor fan, an outdoor compressor, and the control device 1 of the air conditioner according to the second aspect of the present invention.
Specifically, the indoor evaporator is used for indoor heat exchange, and the temperature of the indoor evaporator is adjusted to reach a threshold temperature, so that inactivation treatment can be performed on microorganisms such as viruses and bacteria attached to the indoor evaporator and the nearby indoor evaporator. The indoor fan is used for indoor and outdoor heat exchange, adjusts the temperature of the indoor evaporator and provides heat for the cavity of the air conditioner and the like, and the indoor fan is communicated with the control module 50 through the fan module 30. The outdoor compressor is used for adjusting heat exchange between the indoor evaporator and the outdoor condenser, the operation frequency of the outdoor compressor influences the indoor and outdoor heat exchange quantity, and the outdoor compressor is communicated with the control module 50 through the compressor module 40.
According to the air conditioner of the embodiment of the invention, the control device 1 of the air conditioner can avoid the condition of unstable system caused by rapid frequency reduction due to frequency limit protection.
Other configurations and operations of the air conditioner according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
A non-transitory computer-readable storage medium according to a fourth aspect embodiment of the present invention has stored thereon a computer program that, when executed by a processor, implements a control method of an air conditioner according to the first aspect embodiment of the present invention.
According to the non-transitory computer readable storage medium of the embodiment of the invention, the condition that the frequency is rapidly reduced due to frequency limiting protection to cause system instability can be avoided.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, "a first feature" or "a second feature" may include one or more of the features, and the first feature "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. The first feature being "on," "over" and "above" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "a specific embodiment," "an example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A method of controlling an air conditioner, comprising:
acquiring a threshold temperature of an indoor evaporator of the air conditioner, a current temperature of the indoor evaporator, an outdoor frequency limiting value of the air conditioner, a first threshold of the air conditioner, a second threshold of the air conditioner and a preset condition value of the air conditioner, wherein the second threshold is less than or equal to the outdoor frequency limiting value, the first threshold is less than the second threshold, and the preset condition value is less than the second threshold;
adjusting the rotating speed of an indoor fan of the air conditioner and the operating frequency of the outdoor compressor according to the difference value between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator;
acquiring an outdoor operation value of the air conditioner;
when the outdoor operation value is greater than the first threshold value and less than the second threshold value, keeping the operation frequency of the outdoor compressor unchanged;
when the outdoor operation value is larger than the second threshold value, controlling the operation frequency of the outdoor compressor to be reduced by a first frequency reduction amplitude and a first frequency reduction period;
and when the outdoor operation value is smaller than the preset condition value, controlling the operation frequency of the outdoor compressor to decrease by a second frequency reduction amplitude and a second frequency reduction period, wherein the comprehensive frequency reduction speed of the first frequency reduction amplitude and the first frequency reduction period is greater than the comprehensive frequency reduction speed of the second frequency reduction amplitude and the second frequency reduction period.
2. The control method of an air conditioner according to claim 1, wherein the outdoor frequency limit value includes one of an outdoor discharge air temperature frequency limit value, an outdoor condenser temperature frequency limit value, a current frequency limit value, and a voltage frequency limit value, and the outdoor operation value includes one of an outdoor discharge air temperature operation value, an outdoor condenser temperature operation value, a current operation value, and a voltage operation value corresponding to the outdoor frequency limit value.
3. The control method of an air conditioner according to claim 1, wherein the preset condition value is obtained according to the following formula:
f2 is k × F1, F2 is the preset condition value, F1 is the operating frequency of the outdoor compressor before the start of frequency reduction, and k is the preset frequency reduction coefficient.
4. The control method of an air conditioner according to claim 1, wherein the preset condition values are corresponding parameter values at the time of release of the outdoor frequency limit signal.
5. The control method of an air conditioner according to claim 1, wherein the first down conversion amplitude is greater than the second down conversion amplitude, and the first down conversion period is less than the second down conversion period.
6. The control method of an air conditioner according to claim 1, further comprising:
acquiring a third threshold value of the air conditioner, wherein the third threshold value is smaller than the preset condition value;
and when the outdoor operation value is smaller than the third threshold value, controlling the operation frequency of the outdoor compressor to rise by the frequency rising amplitude value and the frequency rising period.
7. The control method of an air conditioner according to any one of claims 1-6, wherein when the current temperature of the indoor evaporator is less than the threshold temperature of the indoor evaporator, the rotation speed of the indoor fan is decreased by the adjustment amplitude K1 and the adjustment period T1 and/or the operation frequency of the outdoor compressor is increased by the adjustment amplitude K2 and the adjustment period T2 according to the difference between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator;
increasing the rotation speed of the indoor fan by adjusting a magnitude K3 and an adjustment period T3 and/or decreasing the operating frequency of the outdoor compressor by adjusting a magnitude K3 and an adjustment period T3 according to a difference between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator when the current temperature of the indoor evaporator is greater than the threshold temperature of the indoor evaporator.
8. A control apparatus of an air conditioner based on the control method of the air conditioner according to any one of claims 1 to 7, characterized by comprising:
the evaporator temperature acquisition module is used for acquiring the current temperature of the indoor evaporator;
the frequency limit detection module is used for acquiring the outdoor operation value;
the fan module is used for executing the rotating speed of the indoor fan;
a compressor module for executing an operating frequency of the outdoor compressor;
the control module is respectively communicated with the evaporator temperature acquisition module, the frequency limiting detection module, the fan module and the compressor module, and adjusts the rotating speed of the indoor fan and the operating frequency of the outdoor compressor according to the difference value between the current temperature of the indoor evaporator and the threshold temperature of the indoor evaporator;
when the outdoor operation value is greater than the first threshold value and less than the second threshold value, the control module keeps the operation frequency of the outdoor compressor unchanged;
when the outdoor operation value is larger than the second threshold value, the control module controls the operation frequency of the outdoor compressor to be reduced by a first frequency reduction amplitude and a first frequency reduction period;
and when the outdoor operation value is smaller than the preset condition value, the control module controls the operation frequency of the outdoor compressor to be reduced by a second frequency reduction amplitude and a second frequency reduction period.
9. An air conditioner characterized by comprising an indoor evaporator, an indoor fan, an outdoor compressor and the control device of the air conditioner according to claim 8.
10. A non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the control method of an air conditioner according to any one of claims 1 to 7.
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