CN113091284A - Control method of air conditioner - Google Patents

Control method of air conditioner Download PDF

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Publication number
CN113091284A
CN113091284A CN202110461093.8A CN202110461093A CN113091284A CN 113091284 A CN113091284 A CN 113091284A CN 202110461093 A CN202110461093 A CN 202110461093A CN 113091284 A CN113091284 A CN 113091284A
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temperature
preset
indoor
low
outdoor
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CN113091284B (en
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朱磊
邹海如
吕根贵
王新民
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Hisense Guangdong Air Conditioning Co Ltd
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Hisense Guangdong Air Conditioning Co Ltd
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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
    • 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
    • F24F11/46—Improving electric energy efficiency or saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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
    • F24F2110/12—Temperature of the outside air
    • 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)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a control method of an air conditioner, which comprises the following steps: detecting whether the air conditioner is in a heating operation mode; if so, acquiring the current outdoor temperature, and judging whether the current outdoor temperature is in a preset outdoor high-temperature area or a preset outdoor low-temperature area; if the current outdoor temperature is in a preset outdoor high-temperature area, calculating the maximum allowable operating frequency of the compressor according to the current outdoor temperature; and if the current outdoor temperature is in the preset outdoor low-temperature region, acquiring the current indoor temperature, wherein the preset outdoor low-temperature region comprises a plurality of preset outdoor sub-low-temperature regions, the maximum allowable operation frequency of the compressor is controlled to be reduced along with the increase of the preset outdoor sub-low-temperature region, and the maximum allowable operation frequency of the compressor is controlled to be reduced along with the increase of the current indoor temperature in each preset outdoor sub-low temperature. According to the control method of the air conditioner, the maximum operation frequency of the compressor is adjusted by combining the indoor environment temperature and the outdoor environment temperature, the energy efficiency ratio of the air conditioner is improved, and the service life of the air conditioner is prolonged.

Description

Control method of air conditioner
Technical Field
The invention relates to the technical field of temperature regulation, in particular to a control method of an air conditioner
Background
In the related art, the maximum operating frequency of the compressor is usually calculated only according to the outdoor ambient temperature, and if the air conditioner operates in the heating mode, when the outdoor ambient temperature is low, the air conditioner can achieve indoor rapid heating by increasing the maximum allowable operating frequency of the compressor, but as the indoor ambient temperature increases, the load of the compressor increases, the reliability of the compressor and the controller is reduced, and the noise and the current are large, which is not beneficial to energy saving.
Some air conditioners calculate the maximum operating frequency of the compressor together according to the indoor ambient temperature and the outdoor ambient temperature, so that when the indoor ambient temperature and the outdoor ambient temperature are lower, the maximum operating frequency of the compressor is higher to meet the heating requirement of a user, and the maximum operating frequency of the compressor is adjusted according to the indoor ambient temperature along with the rise of the indoor ambient temperature.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to provide a control method of an air conditioner capable of adjusting a maximum allowable operation frequency of a compressor in combination of an indoor ambient temperature and an outdoor ambient temperature, and also improving an energy efficiency ratio of the air conditioner and extending a service life of the air conditioner.
In order to achieve the above object, a control method of an air conditioner according to an embodiment of the present invention includes: detecting whether the air conditioner is in a heating operation mode; if yes, acquiring the current outdoor temperature TOutdoorsAnd judging the current outdoor temperature TOutdoorsWhether the temperature is in a preset outdoor high-temperature area or a preset outdoor low-temperature area; if the current outdoor temperature TOutdoorsIn the preset outdoor high-temperature area according to the current outdoor temperature TOutdoorsCalculating the maximum allowable operation frequency F of the compressor; if the current outdoor temperature TOutdoorsIf the temperature is in the preset outdoor low-temperature area, the current indoor temperature T is obtainedIndoor useThe preset outdoor low-temperature area comprises a plurality of preset outdoor sub-low-temperature areas, the maximum allowable operation frequency F of the compressor is controlled to be reduced along with the increase of the preset outdoor sub-low-temperature areas, and the maximum allowable operation frequency F of the compressor is controlled to be along with the current indoor temperature T in each preset outdoor sub-low temperatureIndoor useIs increased and decreased.
The control method of the air conditioner according to the embodiment of the invention not only can adjust the maximum allowable operation frequency of the compressor by combining the indoor environment temperature and the outdoor environment temperature, but also can improve the energy efficiency ratio of the air conditioner and prolong the service life of the air conditioner.
According to some embodiments of the invention, the preset outdoor high temperature zone comprises a preset relatively low temperature zone and a preset relatively high temperature zone; if the current outdoor temperature TOutdoorsIn the preset relative low temperature area, the maximum allowable operation frequency F of the compressor is controlled along with the current outdoor temperature TOutdoorsIs increased and decreased; if the current outdoor temperature TOutdoorsAnd controlling the maximum allowable operation frequency F of the compressor to keep a preset minimum frequency when the compressor is in the preset relative high temperature area.
According to some embodiments of the present invention, the preset relatively low temperature zone comprises a plurality of first preset sub high temperature zones, each of the first preset sub high temperature zones corresponds to a frequency control rule, and in each of the first preset sub high temperature zones, the maximum allowable operation frequency F of the compressor is controlled along with the current outdoor temperature TOutdoorsDecreases and is linear.
According to some embodiments of the invention, each of the first preset sub-high temperature zones comprises a minimum high temperature threshold T1 and a maximum high temperature threshold T2, the maximum allowable operating frequency F of the compressor corresponding to the minimum high temperature threshold T1 is a maximum frequency threshold F1, the maximum allowable operating frequency F of the compressor corresponding to the maximum high temperature threshold T2 is a maximum frequency threshold F1A minimum frequency threshold F2; wherein the frequency control rule is:
Figure BDA0003042289530000021
according to some embodiments of the invention, the preset minimum frequency is a minimum frequency threshold F2 of a first preset sub-high temperature zone adjacent to the preset relatively high temperature zone.
According to some embodiments of the present invention, a plurality of indoor temperature zones are disposed in each of the preset outdoor low temperature zones, and the maximum allowable operating frequency F of the compressor is controlled to decrease with an increase in the indoor temperature zone in each of the preset outdoor low temperature zones and to reach the current indoor temperature T in each of the indoor temperature zonesIndoor useIn a linear relationship.
According to some embodiments of the present invention, for the preset outdoor low temperature zone, wherein the maximum allowable operation frequency F of the compressor and the current indoor temperature T are in a part of the indoor temperature intervalIndoor useThe correlation coefficient of (a) is 0; in another part of the indoor temperature interval, the maximum allowable operation frequency F of the compressor and the current indoor temperature TIndoor useIs less than 0.
According to some embodiments of the invention, the preset outdoor sub-low temperature zone comprises a first preset outdoor sub-low temperature zone, a second preset outdoor sub-low temperature zone, a third preset outdoor sub-low temperature zone and a fourth preset outdoor sub-low temperature zone which are sequentially increased; the first preset outdoor sub-low temperature region, the second preset outdoor sub-low temperature region, the third preset outdoor sub-low temperature region, the fourth preset outdoor sub-low temperature region and the preset outdoor high temperature region are sequentially divided by a first low-temperature threshold, a second low-temperature threshold, a third low-temperature threshold and a fourth low-temperature threshold; the first low temperature threshold is associated with a first low temperature sub-frequency f1, the second low temperature threshold is associated with a second low temperature sub-frequency f2, the third low temperature threshold is associated with a third low temperature sub-frequency f3, and the fourth low temperature threshold is associated with a fourth low temperature sub-frequency f 4; every it includes that the first indoor temperature interval of predetermineeing, the second that increases in proper order predetermines the indoor temperature interval, the third predetermines the indoor temperature interval and the fourth predetermines the indoor temperature interval to predetermine outdoor sub-low temperature interval, the first indoor temperature interval of predetermineeing the second predetermine the indoor temperature interval the third predetermine the indoor temperature interval with the fourth predetermines the indoor temperature interval and predetermine the temperature T13 boundary with first predetermined temperature T11, second predetermined temperature T12 and third in proper order.
According to some embodiments of the invention, within the first predetermined outdoor sub-low temperature zone; if the current indoor temperature TIndoor useIf the temperature is in the first preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be the first low-temperature sub-frequency F1; if the current indoor temperature TIndoor useIf the temperature is in the second preset indoor temperature range, controlling the maximum allowable operation frequency F of the compressor to be the first low-temperature sub-frequency F1; if the current indoor temperature TIndoor useIn the third preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000031
If the current indoor temperature TIndoor useIn the fourth preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000032
According to some embodiments of the invention, within the second predetermined outdoor sub-low temperature zone; if the current indoor temperature TIndoor useIf the temperature is in the first preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be the first low-temperature sub-frequency F1; if the current indoor temperature TIndoor useIn the second preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000033
If the current indoor temperature TIndoor useIn the third preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000034
If the current indoor temperature TIndoor useIn the fourth preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000035
According to some embodiments of the invention, within the third predetermined outdoor sub-low temperature zone; if the current indoor temperature TIndoor useIf the temperature is in the first preset indoor temperature range, controlling the maximum allowable operation frequency F of the compressor to be the second low-temperature sub-frequency F2; if the current indoor temperature TIndoor useIn the second preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000036
If the current indoor temperature TIndoor useIn the third preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000037
If the current indoor temperature TIndoor useAnd if the temperature is in the fourth preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be the fourth low-temperature sub-frequency F4.
According to some embodiments of the invention, within the fourth predetermined outdoor sub-low temperature zone; if the current indoor temperature TIndoor useIf the temperature is in the first preset indoor temperature range, controlling the maximum allowable operation frequency F of the compressor to be the third low-temperature sub-frequency F3; if the current indoor temperature TIndoor useIn the second preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000038
If the current indoor temperature TIndoor useIn the third preset indoor temperature interval, controlling the maximum allowance of the compressorThe allowable operating frequency F is the fourth low-temperature sub-frequency F4; if the current indoor temperature TIndoor useAnd if the temperature is in the fourth preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be the fourth low-temperature sub-frequency F4.
According to some embodiments of the invention, the first preset temperature T11 is 0 ℃, the second preset temperature T12 is 5 ℃, and the third preset temperature T13 is 10 ℃.
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
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a control method of an air conditioner.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "a plurality" means two or more.
A control method of an air conditioner according to an embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1, the control method of the air conditioner includes:
detecting whether the air conditioner is in a heating operation mode;
if yes, acquiring the current outdoor temperature TOutdoorsAnd determines the current outdoor temperature TOutdoorsWhether the temperature is in a preset outdoor high-temperature area or a preset outdoor low-temperature area;
if the current outdoor temperature TOutdoorsIn a preset outdoor high-temperature area according to the current outdoor temperature TOutdoorsCalculating the maximum allowable operation frequency F of the compressor;
if the current outdoor temperature TOutdoorsIn a preset outdoor low-temperature area, the current indoor temperature T is obtainedIndoor useThe preset outdoor low-temperature area comprises a plurality of preset outdoor sub-low-temperature areas, the maximum allowable operation frequency F of the compressor is controlled to be reduced along with the increase of the preset outdoor sub-low-temperature areas, and the maximum allowable operation frequency F of the compressor is controlled to be controlled along with the current indoor temperature T in each preset outdoor sub-low temperature areaIndoor useIs increased and decreased.
The control method of the air conditioner can be applied to the inverter air conditioner.
According to the control method of the air conditioner provided by the embodiment of the invention, the current outdoor temperature T is judged firstlyOutdoorsTemperature interval, current outdoor temperature TOutdoorsWhen the outdoor temperature is in the preset outdoor high-temperature area, the current outdoor temperature T isOutdoorsAnd therefore the maximum allowable operating frequency F of the compressor is lower, and the indoor ambient temperature does not need to be added to further limit the maximum allowable operating frequency F of the compressor. And the current outdoor temperature TOutdoorsWhen the outdoor temperature is in the preset outdoor low-temperature area, the current outdoor temperature TOutdoorsLow, in order to meet the heating requirement of the user, the air conditioner needs to heat quickly, so the maximum allowable operation frequency F of the compressor needs to be set high in order to raise the indoor environment temperature quickly, and at this time, the front indoor temperature T needs to be consideredIndoor useTo adjust the maximum allowable operating frequency F again, thereby reducing the fluctuation space of the actual operating frequency of the air conditioner, so that the fluctuation range of the actual operating frequency of the air conditioner is small,it is beneficial to energy saving, noise reduction and large current prevention.
And, by dividing the preset outdoor low temperature zone into a plurality of preset outdoor sub low temperature zones, the maximum allowable operating frequency F of the compressor is controlled to decrease with the increase of the preset outdoor sub low temperature zone, and the maximum allowable operating frequency F of the compressor is controlled to decrease with the current indoor temperature T in each preset outdoor sub low temperature zoneIndoor useIs increased and decreased. Therefore, the maximum allowable operation frequency F of the compressor is more accurately controlled, and the energy efficiency ratio of the air conditioner is improved, and the service life of the air conditioner is prolonged.
In this way, the control method of the air conditioner according to the embodiment of the invention can not only adjust the maximum allowable operation frequency of the compressor by combining the current indoor environment temperature and the current outdoor environment temperature, but also improve the energy efficiency ratio of the air conditioner and prolong the service life of the air conditioner.
According to some embodiments of the present invention, as shown in fig. 1, the predetermined outdoor high temperature area includes a predetermined relatively low temperature area and a predetermined relatively high temperature area if the current outdoor temperature T isOutdoorsIn a preset relatively low temperature region, the maximum allowable operation frequency F of the compressor is controlled along with the current outdoor temperature TOutdoorsIs increased and decreased so that the maximum allowed operating frequency F can be varied with the current outdoor temperature TOutdoorsIs varied, the accuracy of the control of the maximum allowed operating frequency F is improved.
If the current outdoor temperature TOutdoorsAnd in the preset relative high temperature area, controlling the maximum allowable operation frequency F of the compressor to keep the preset minimum frequency. That is, the maximum allowable operating frequency F of the compressor and the temperature in the preset relatively high temperature region are in a linear relationship, and the linear correlation coefficient is zero.
Wherein the temperature within the range of the preset relatively low temperature region is lower than the temperature within the range of the preset relatively high temperature region.
Current outdoor temperature TOutdoorsIn the preset relatively high temperature region, the heating demand of the user is lower, which may cause the air conditioner to operate for a very short time, which may cause the indoor ambient temperature to reach the temperature set by the user, thereby causing the compressor to operate at the minimum frequency and be emptyWhen the regulator is started to reach the set temperature when the indoor environment temperature reaches, the phenomenon that the actual operation frequency fluctuation range of the compressor is too large to generate large current and high noise can be avoided, the reliability of the compressor and the controller is improved, and the energy efficiency ratio is improved.
Further, as shown in fig. 1, the preset relatively low temperature zone includes a plurality of first preset sub high temperature zones, each of the first preset sub high temperature zones corresponds to a frequency control rule, and in each of the first preset sub high temperature zones, the maximum allowable operating frequency F of the compressor is controlled to follow the current outdoor temperature TOutdoorsDecreases and is linear.
Wherein, in the preset relatively low temperature zone, the maximum allowable operation frequency F of the compressor is also reduced along with the increase of the first preset sub high temperature zone.
Due to the maximum allowable operating frequency F and the current outdoor temperature TOutdoorsIn a linear relationship, the current outdoor temperature TOutdoorsThe change is a continuous process, so the maximum allowable operation frequency F is also continuously changed instead of being discontinuously changed, thus the change of the maximum allowable operation frequency F is more stable, the fluctuation probability is low, the performance of the compressor is favorably optimized, and the service life of the compressor is prolonged.
Specifically, each first preset sub-high temperature zone includes a minimum high temperature threshold T1 and a maximum high temperature threshold T2, the maximum allowable operating frequency F of the compressor corresponding to the minimum high temperature threshold T1 is a maximum frequency threshold F1, and the maximum allowable operating frequency F of the compressor corresponding to the maximum high temperature threshold T2 is a minimum frequency threshold F2. Wherein, the frequency control rule is as follows:
Figure BDA0003042289530000061
for example, the plurality of first predetermined sub-high temperature zones are consecutive temperature intervals, that is, the minimum high temperature threshold T1 of each first predetermined sub-high temperature zone is smaller than and adjacent to the maximum high temperature threshold T2 of the first predetermined sub-high temperature zone, and the maximum high temperature threshold T2 of each first predetermined sub-high temperature zone is larger than and adjacent to the minimum high temperature threshold T1 of the first predetermined sub-high temperature zone.
Therefore, the maximum allowable operating frequency F of the compressors corresponding to the adjacent first preset sub-high temperature zones at the critical points is the same, so that the maximum allowable operating frequency F of the compressors corresponding to the plurality of first preset sub-high temperature zones is continuously changed instead of discontinuously changed, the maximum allowable operating frequency F is prevented from jumping fluctuation, the load change of the compressors is more stable, noise is not easy to occur, the reliability of the compressors and the controller is higher, and the energy conservation is facilitated.
The preset minimum frequency is a minimum frequency threshold F2 of a first preset sub-high temperature zone adjacent to the preset relatively high temperature zone. Therefore, the maximum allowable operating frequency F of the compressor corresponding to the preset relative low-temperature area and the preset relative high-temperature area at the critical point is the same, so that the maximum allowable operating frequency F of the compressor corresponding to the preset relative low-temperature area and the preset relative high-temperature area is continuously changed instead of discontinuously changed, the phenomenon that the maximum allowable operating frequency F fluctuates in a jumping mode is further avoided, the load change of the compressor is more stable, noise is not easy to generate, the reliability of the compressor and the controller is higher, and energy conservation is facilitated.
According to some embodiments of the present invention, a plurality of indoor temperature sections are provided in each of the preset outdoor low temperature regions, and in each of the indoor temperature sections, the maximum allowable operating frequency F of the compressor is controlled to decrease with an increase in the indoor temperature section in each of the preset outdoor low temperature regions and to match the current indoor temperature T in each of the indoor temperature sectionsIndoor useIn a linear relationship.
Due to the maximum allowable operating frequency F and the current outdoor temperature TOutdoorsIn a linear relationship, the current indoor temperature TIndoor useThe change is a continuous process, so that the maximum allowable operation frequency F is continuously changed in each indoor temperature interval instead of being discontinuously changed, so that the change of the maximum allowable operation frequency F is more stable, the fluctuation probability is low, the performance of the compressor is favorably optimized, and the service life of the compressor is prolonged.
And moreover, a plurality of temperature spaces are continuously divided in each preset outdoor low-temperature area, so that the precision control of the compressor is favorably improved, the energy efficiency ratio of the compressor is improved, and the normal efficiency and energy conservation of the compressor are favorably realized.
Further, for the preset outdoor low temperature zone, wherein in a part of the indoor temperature interval, the maximum allowable operation frequency F of the compressor and the current indoor temperature TIndoor useThe correlation coefficient of (2) is 0, and the maximum allowable operating frequency F is a fixed value in the part of indoor temperature interval; in another part of indoor temperature interval, the maximum allowable operation frequency F of the compressor and the current indoor temperature TIndoor useIs less than 0, the maximum allowable operating frequency F is a variable value in the part of the indoor temperature interval and is dependent on the current indoor temperature TIndoor useIncreasing and decreasing.
For example, the temperatures in the one part of indoor temperature intervals may be all lower than the temperatures in the other part of indoor temperature intervals; alternatively, the one part of the indoor temperature sections are located on both sides of the other part of the indoor temperature sections, that is, some temperatures in the one part of the indoor temperature sections are lower than those in the other part of the indoor temperature sections, and other temperatures in the one part of the indoor temperature sections are higher than those in the other part of the indoor temperature sections.
Therefore, the maximum allowable operation frequency F of the compressor does not change along with the indoor environment temperature in certain temperature intervals, the heating requirement of a user is met, the load of the compressor is reduced, the control of the compressor is simplified, and the operation efficiency of a control system is improved.
In some embodiments of the present invention, the preset outdoor sub low-temperature region includes a first preset outdoor sub low-temperature region, a second preset outdoor sub low-temperature region, a third preset outdoor sub low-temperature region, and a fourth preset outdoor sub low-temperature region, which are sequentially increased; the first preset outdoor sub-low temperature region, the second preset outdoor sub-low temperature region, the third preset outdoor sub-low temperature region, the fourth preset outdoor sub-low temperature region and the preset outdoor high temperature region are sequentially divided by a first low-temperature threshold, a second low-temperature threshold, a third low-temperature threshold and a fourth low-temperature threshold.
Specifically, the temperature in the first preset outdoor sub-low temperature zone is less than a first low-temperature threshold, the temperature in the second preset outdoor sub-low temperature zone is not less than the first low-temperature threshold and is less than a second low-temperature threshold, the temperature in the third preset outdoor sub-low temperature zone is not less than the second low-temperature threshold and is less than a third low-temperature threshold, and the temperature in the fourth preset outdoor sub-low temperature zone is not less than the third low-temperature threshold and is less than a fourth low-temperature threshold. The fourth low temperature threshold is the same as the minimum high temperature threshold T1 of the first preset sub-high temperature zone closest to the fourth preset outdoor sub-low temperature zone.
Wherein the first low temperature threshold is associated with the first low temperature sub-frequency f1, the second low temperature threshold is associated with the second low temperature sub-frequency f2, the third low temperature threshold is associated with the third low temperature sub-frequency f3, and the fourth low temperature threshold is associated with the fourth low temperature sub-frequency f 4. It can be understood that: f1 > f2 > f3 > f 4.
Each preset outdoor sub-low temperature interval comprises a first preset indoor temperature interval, a second preset indoor temperature interval, a third preset indoor temperature interval and a fourth preset indoor temperature interval which are sequentially increased, and the first preset indoor temperature interval, the second preset indoor temperature interval, the third preset indoor temperature interval and the fourth preset indoor temperature interval are sequentially demarcated by a first preset temperature T11, a second preset temperature T12 and a third preset temperature T13.
Specifically, the first preset indoor temperature interval is (— infinity, T11), the second preset indoor temperature interval is [ T11, T12 ], the third preset indoor temperature interval is [ T12, T13 ], and the fourth preset indoor temperature interval is [ T14, + ∞ ").
Therefore, the decomposition of the preset outdoor sub-low temperature region is more detailed, and each preset outdoor sub-low temperature region comprises the same number of preset indoor temperature regions, so that the control rule is convenient to determine.
For example, the first preset temperature T11 is 0 ℃, the second preset temperature T12 is 5 ℃, and the third preset temperature T13 is 10 ℃. Therefore, the human body has different feelings and reactions in different temperature intervals, and the setting of the first preset temperature T11, the second preset temperature T12 and the third preset temperature T13 is the same as or similar to the dividing point among the different temperature intervals, so that the setting reasonableness is improved.
In the first preset outdoor sub-low temperature zone, if soFront room temperature TIndoor useIf the temperature is in the first preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be a first low-temperature sub-frequency F1; if the current indoor temperature TIndoor useIf the temperature is in the second preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be the first low-temperature sub-frequency F1; if the current indoor temperature TIndoor useIn a third preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000081
If the current indoor temperature TIndoor useIn the fourth preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000082
In other words, the maximum allowable operation frequency F is operated at the constant value of the first low temperature sub-frequency F1 in the first preset indoor temperature section and the second preset indoor temperature section of the first preset outdoor sub-low temperature zone, at which the current indoor temperature T is atIndoor useAnd the current outdoor temperature TOutdoorsThe maximum allowable operation frequency F of the compressor is set to the maximum value allowed by the preset outdoor sub-low temperature zone, so that indoor rapid heating is realized, and the heating requirement of a user is met preferentially.
In addition, in a third preset indoor temperature interval and a fourth preset indoor temperature interval of the first preset outdoor sub-low temperature zone, the maximum allowable operation frequency F is along with the current indoor temperature TIndoor useAnd increasing and decreasing, wherein the control formulas in the third preset indoor temperature interval and the fourth preset indoor temperature interval determine that various factors (such as noise, energy efficiency ratio and heating effect) need to be comprehensively considered so as to realize constant-efficiency energy conservation.
In the second preset outdoor sub-low temperature zone, if the current indoor temperature TIndoor useIf the temperature is in the first preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be a first low-temperature sub-frequency F1; if the current indoor temperature TIndoor useIn the second preset indoor temperature interval, the pressure is controlledThe maximum allowable operation frequency F of the compressor is
Figure BDA0003042289530000083
If the current indoor temperature TIndoor useIn a third preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000084
If the current indoor temperature TIndoor useIn the fourth preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000085
In other words, in the first preset indoor temperature interval of the second preset outdoor sub-low temperature zone, the maximum allowable operation frequency F is operated at the constant value of the first low temperature sub-frequency F1, and the current indoor temperature T is at this timeIndoor useAnd the current outdoor temperature TOutdoorsThe maximum allowable operation frequency F of the compressor is set to the maximum value allowed by the preset outdoor sub-low temperature zone, so that indoor rapid heating is realized, and the heating requirement of a user is met preferentially.
In addition, in a second preset indoor temperature interval, a third preset indoor temperature interval and a fourth preset indoor temperature interval of the first preset outdoor sub-low temperature zone, the maximum allowable operation frequency F is along with the current indoor temperature TIndoor useAnd increasing and decreasing, wherein the control formulas in the second preset indoor temperature interval, the third preset indoor temperature interval and the fourth preset indoor temperature interval determine that various factors (such as noise, energy efficiency ratio and heating effect) need to be comprehensively considered so as to realize constant-efficiency energy conservation.
In a third preset outdoor sub-low temperature zone, if the current indoor temperature TIndoor useIf the temperature is in the first preset indoor temperature range, controlling the maximum allowable operation frequency F of the compressor to be the second low-temperature sub-frequency F2; if the current indoor temperature TIndoor useIn a second preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000091
If the current indoor temperature TIndoor useIn a third preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure BDA0003042289530000092
If the current indoor temperature TIndoor useIn the fourth preset indoor temperature interval, the maximum allowable operating frequency F of the compressor is controlled to be the fourth low temperature sub-frequency F4.
In other words, in the first preset indoor temperature interval of the third preset outdoor sub-low temperature zone, the maximum allowable operation frequency F is operated at the constant value of the second low temperature sub-frequency F2, and the current indoor temperature T is at this timeIndoor useAnd the current outdoor temperature TOutdoorsThe maximum allowable operation frequency F of the compressor is set to the maximum value allowed by the preset outdoor sub-low temperature zone, so that indoor rapid heating is realized, and the heating requirement of a user is met preferentially.
In addition, in a second preset indoor temperature interval and a third preset indoor temperature interval of a third preset outdoor sub-low temperature zone, the maximum allowable operation frequency F is along with the current indoor temperature TIndoor useAnd increasing and decreasing, wherein the control formulas in the second preset indoor temperature interval and the third preset indoor temperature interval determine that various factors (such as noise, energy efficiency ratio and heating effect) need to be comprehensively considered so as to realize normal-efficiency energy conservation.
In addition, in a fourth preset indoor temperature interval of the third preset outdoor sub-low temperature zone, the maximum allowable operation frequency F is operated at a fourth low temperature sub-frequency F4 with a constant value, and the current indoor temperature T is at this timeIndoor useThe maximum allowable operation frequency F of the compressor is set to the minimum value allowed by the preset outdoor sub-low temperature zone, that is, the heating requirement of the user can be ensured.
In the fourth preset outdoor sub-low temperature zone, if the current indoor temperature T isIndoor useIf the temperature is in the first preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be the third low-temperature sub-frequency F3; if the current indoor temperature TIndoor useAt a second predetermined indoor temperatureWithin a certain range, the maximum allowable operation frequency F of the compressor is controlled to be
Figure BDA0003042289530000093
If the current indoor temperature TIndoor useIf the temperature is in the third preset indoor temperature range, controlling the maximum allowable operation frequency F of the compressor to be the fourth low-temperature sub-frequency F4; if the current indoor temperature TIndoor useIn the fourth preset indoor temperature interval, the maximum allowable operating frequency F of the compressor is controlled to be the fourth low temperature sub-frequency F4.
In other words, in the first preset indoor temperature interval of the fourth preset outdoor sub-low temperature zone, the maximum allowable operation frequency F is operated at the constant value of the third low temperature sub-frequency F3, and the current indoor temperature T is at this timeIndoor useAnd the current outdoor temperature TOutdoorsThe maximum allowable operation frequency F of the compressor is set to the maximum value allowed by the preset outdoor sub-low temperature zone, so that indoor rapid heating is realized, and the heating requirement of a user is met preferentially.
In addition, in a second preset indoor temperature interval of a fourth preset outdoor sub-low temperature zone, the maximum allowable operation frequency F is along with the current indoor temperature TIndoor useAnd increased and decreased, wherein the control formula in the third preset indoor temperature interval determines that various factors (such as noise, energy efficiency ratio and heating effect) need to be comprehensively considered to realize constant efficiency energy saving.
In addition, in the third preset indoor temperature interval and the fourth preset indoor temperature interval of the fourth preset outdoor sub-low temperature zone, the maximum allowable operation frequency F operates at the fourth low temperature sub-frequency F4 with a constant value, and the current indoor temperature T is at this timeIndoor useThe maximum allowable operation frequency F of the compressor is set to the minimum value allowed by the preset outdoor sub-low temperature zone, that is, the heating requirement of the user can be ensured.
The control formulas used for the third preset indoor temperature section of the first preset outdoor sub-low temperature zone and the second preset indoor temperature section of the second preset outdoor sub-low temperature zone are the same, the control formulas used for the fourth preset indoor temperature section of the first preset outdoor sub-low temperature zone, the third preset indoor temperature section of the second preset outdoor sub-low temperature zone and the second preset indoor temperature section of the third preset outdoor sub-low temperature zone are the same, and the control formulas used for the fourth preset indoor temperature section of the second preset outdoor sub-low temperature zone, the third preset indoor temperature section of the third preset outdoor sub-low temperature zone and the second preset indoor temperature section of the fourth preset outdoor sub-low temperature zone are the same.
Therefore, the heating requirement of a user can be met, the energy efficiency ratio of the compressor is improved, and meanwhile, the control logic is simplified.
Other configurations and operations of the control method 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.
The air conditioner to which the control method of the air conditioner in the present application is applied performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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.
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 (13)

1. A method of controlling an air conditioner, comprising:
detecting whether the air conditioner is in a heating operation mode;
if yes, acquiring the current outdoor temperature TOutdoorsAnd judging the current outdoor temperature TOutdoorsWhether the temperature is in a preset outdoor high-temperature area or a preset outdoor low-temperature area;
if the current outdoor temperature TOutdoorsIn the preset outdoor high-temperature area according to the current outdoor temperature TOutdoorsCalculating the maximum allowable operation frequency F of the compressor;
if the current outdoor temperature TOutdoorsIf the temperature is in the preset outdoor low-temperature area, the current indoor temperature T is obtainedIndoor useThe preset outdoor low-temperature area comprises a plurality of preset outdoor sub low-temperature areas, the maximum allowable operation frequency F of the compressor is controlled to be reduced along with the increase of the preset outdoor sub low-temperature areas, and the maximum allowable operation frequency F of the compressor is controlled to be controlled along with the current indoor temperature in each preset outdoor sub low-temperature areaDegree TIndoor useIs increased and decreased.
2. The control method of an air conditioner according to claim 1, wherein the preset outdoor high temperature zone includes a preset relatively low temperature zone and a preset relatively high temperature zone;
if the current outdoor temperature TOutdoorsIn the preset relative low temperature area, the maximum allowable operation frequency F of the compressor is controlled along with the current outdoor temperature TOutdoorsIs increased and decreased;
if the current outdoor temperature TOutdoorsAnd controlling the maximum allowable operation frequency F of the compressor to keep a preset minimum frequency when the compressor is in the preset relative high temperature area.
3. The control method of an air conditioner according to claim 2, wherein the preset relatively low temperature zone includes a plurality of first preset sub high temperature zones, each of the first preset sub high temperature zones corresponds to a frequency control rule, and in each of the first preset sub high temperature zones, the maximum allowable operation frequency F of the compressor is controlled in accordance with the current outdoor temperature TOutdoorsDecreases and is linear.
4. The control method of an air conditioner according to claim 3, wherein each of the first preset sub-high temperature zones includes a minimum high temperature threshold T1 and a maximum high temperature threshold T2, the maximum allowable operation frequency F of the compressor corresponding to the minimum high temperature threshold T1 is a maximum frequency threshold F1, the maximum allowable operation frequency F of the compressor corresponding to the maximum high temperature threshold T2 is a minimum frequency threshold F2;
wherein the frequency control rule is:
Figure FDA0003042289520000011
5. the control method of an air conditioner according to claim 4, wherein the preset minimum frequency is a minimum frequency threshold value F2 of a first preset sub-high temperature zone adjacent to the preset relatively high temperature zone.
6. The control method of an air conditioner according to claim 1, wherein a plurality of indoor temperature sections are provided in each of the preset outdoor low temperature sections, and a maximum allowable operating frequency F of the compressor is controlled to decrease with an increase in the indoor temperature section in each of the preset outdoor low temperature sections and to be equal to the current indoor temperature T in each of the indoor temperature sectionsIndoor useIn a linear relationship.
7. The control method of an air conditioner according to claim 6, wherein for the preset outdoor low temperature region, in which the maximum allowable operation frequency F of the compressor and the current indoor temperature T are in a part of the indoor temperature sectionIndoor useThe correlation coefficient of (a) is 0; in another part of the indoor temperature interval, the maximum allowable operation frequency F of the compressor and the current indoor temperature TIndoor useIs less than 0.
8. The control method of an air conditioner according to claim 6, wherein the preset outdoor sub low temperature zone includes a first preset outdoor sub low temperature zone, a second preset outdoor sub low temperature zone, a third preset outdoor sub low temperature zone, and a fourth preset outdoor sub low temperature zone, which are sequentially increased;
the first preset outdoor sub-low temperature region, the second preset outdoor sub-low temperature region, the third preset outdoor sub-low temperature region, the fourth preset outdoor sub-low temperature region and the preset outdoor high temperature region are sequentially divided by a first low-temperature threshold, a second low-temperature threshold, a third low-temperature threshold and a fourth low-temperature threshold;
the first low temperature threshold is associated with a first low temperature sub-frequency f1, the second low temperature threshold is associated with a second low temperature sub-frequency f2, the third low temperature threshold is associated with a third low temperature sub-frequency f3, and the fourth low temperature threshold is associated with a fourth low temperature sub-frequency f 4;
every it includes that the first indoor temperature interval of predetermineeing, the second that increases in proper order predetermines the indoor temperature interval, the third predetermines the indoor temperature interval and the fourth predetermines the indoor temperature interval to predetermine outdoor sub-low temperature interval, the first indoor temperature interval of predetermineeing the second predetermine the indoor temperature interval the third predetermine the indoor temperature interval with the fourth predetermines the indoor temperature interval and predetermine the temperature T13 boundary with first predetermined temperature T11, second predetermined temperature T12 and third in proper order.
9. The control method of an air conditioner according to claim 8, wherein in the first preset outdoor sub-low temperature zone;
if the current indoor temperature TIndoor useIf the temperature is in the first preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be the first low-temperature sub-frequency F1;
if the current indoor temperature TIndoor useIf the temperature is in the second preset indoor temperature range, controlling the maximum allowable operation frequency F of the compressor to be the first low-temperature sub-frequency F1;
if the current indoor temperature TIndoor useIn the third preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure FDA0003042289520000021
If the current indoor temperature TIndoor useIn the fourth preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure FDA0003042289520000022
10. The control method of an air conditioner according to claim 8, wherein in the second preset outdoor sub-low temperature zone;
if the current indoor temperature TIndoor useIf the temperature is in the first preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be the first low-temperature sub-frequency F1;
if the current indoor temperature TIndoor useIn the second preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure FDA0003042289520000031
If the current indoor temperature TIndoor useIn the third preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure FDA0003042289520000032
If the current indoor temperature TIndoor useIn the fourth preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure FDA0003042289520000033
11. The control method of an air conditioner according to claim 8, wherein in the third preset outdoor sub-low temperature zone;
if the current indoor temperature TIndoor useIf the temperature is in the first preset indoor temperature range, controlling the maximum allowable operation frequency F of the compressor to be the second low-temperature sub-frequency F2;
if the current indoor temperature TIndoor useIn the second preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure FDA0003042289520000034
If the current indoor temperature TIndoor useIn the third preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure FDA0003042289520000035
If the current indoor temperature TIndoor useAnd if the temperature is in the fourth preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be the fourth low-temperature sub-frequency F4.
12. The control method of an air conditioner according to claim 8, wherein in the fourth preset outdoor sub-low temperature zone;
if the current indoor temperature TIndoor useIf the temperature is in the first preset indoor temperature range, controlling the maximum allowable operation frequency F of the compressor to be the third low-temperature sub-frequency F3;
if the current indoor temperature TIndoor useIn the second preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be
Figure FDA0003042289520000036
If the current indoor temperature TIndoor useIf the temperature is in the third preset indoor temperature range, controlling the maximum allowable operation frequency F of the compressor to be the fourth low-temperature sub-frequency F4;
if the current indoor temperature TIndoor useAnd if the temperature is in the fourth preset indoor temperature interval, controlling the maximum allowable operation frequency F of the compressor to be the fourth low-temperature sub-frequency F4.
13. The control method of an air conditioner according to claim 8, wherein the first preset temperature T11 is 0 ℃, the second preset temperature T12 is 5 ℃, and the third preset temperature T13 is 10 ℃.
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