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CN106091259A - Control method and device for air conditioner and air conditioner - Google Patents

Control method and device for air conditioner and air conditioner Download PDF

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Publication number
CN106091259A
CN106091259A CN201610435700.2A CN201610435700A CN106091259A CN 106091259 A CN106091259 A CN 106091259A CN 201610435700 A CN201610435700 A CN 201610435700A CN 106091259 A CN106091259 A CN 106091259A
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CN
China
Prior art keywords
frequency
gear
compressor
air conditioner
fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201610435700.2A
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Chinese (zh)
Other versions
CN106091259B (en
Inventor
王喜成
李晓群
杨伟
崔松林
杨超
张文天
张婧宜
韦兴春
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
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Priority to CN201610435700.2A priority Critical patent/CN106091259B/en
Publication of CN106091259A publication Critical patent/CN106091259A/en
Application granted granted Critical
Publication of CN106091259B publication Critical patent/CN106091259B/en
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Classifications

    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a control method and a control device for an air conditioner and the air conditioner, wherein the method comprises the following steps: acquiring the current temperature and the set temperature of the environment where an internal unit of the air conditioner is located, and determining whether a first difference value between the current temperature and the set temperature exceeds a preset first temperature threshold value; and when the first difference value does not exceed the first temperature threshold value, controlling a fan wind gear of the air conditioner and the frequency of a compressor of the air conditioner. The scheme of the invention can overcome the defects of inconvenient adjustment, poor energy-saving effect, poor user experience and the like in the prior art, and realizes the beneficial effects of convenient adjustment, good energy-saving effect and good user experience.

Description

Control method and device for air conditioner and air conditioner
Technical Field
The invention belongs to the technical field of air conditioners, particularly relates to a control method and device for an air conditioner and the air conditioner, and particularly relates to a control method and device for improving the comfort and energy conservation of a variable frequency air conditioner and the variable frequency air conditioner.
Background
The air conditioner (i.e. air conditioner) can manually regulate and control parameters of ambient air in the building/structure, such as temperature, humidity, cleanliness, speed and the like. The inverter air conditioner can utilize an inverter to control and adjust the rotating speed of the heart of the air conditioner, namely a compressor, so that the compressor is always in the optimal rotating speed state, and the energy efficiency ratio is improved. In the existing frequency converter (namely, a frequency conversion air conditioner), after a mode (namely, an operation mode) and a wind gear are set, an outdoor unit controller can judge indoor load demand according to a difference value between indoor environment temperature and set temperature; if the demand (namely the indoor load demand) is small, the outdoor unit performs frequency reduction processing to reduce the load output, so that the effects of indoor set temperature stability and energy saving of the frequency converter are achieved.
For example: stopping the compressor (namely stopping the compressor when reaching a temperature point) after detecting that the ambient temperature is lower than a set temperature A (or detecting that the ambient temperature is higher than the set temperature A in the heating mode) in the cooling mode; when the temperature difference reaches another set temperature B again, the compressor is restarted to operate, and in the whole process, the air damper cannot be automatically adjusted (if the air damper is not manually switched), so that the energy-saving effect of the air conditioner is influenced, and the comfort of a user is also influenced.
In the prior art, the defects of inconvenient adjustment, poor energy-saving effect, poor user experience and the like exist.
Disclosure of Invention
The invention aims to provide a control method and device for an air conditioner and the air conditioner, aiming at overcoming the defects that the energy-saving effect is influenced because the wind shield cannot be automatically adjusted in the prior art, and achieving the effect of saving more energy.
The invention provides a control method for an air conditioner, which comprises the following steps: acquiring the current temperature and the set temperature of the environment where an internal unit of the air conditioner is located, and determining whether a first difference value between the current temperature and the set temperature exceeds a preset first temperature threshold value; and when the first difference value does not exceed the first temperature threshold value, controlling a fan wind gear of the air conditioner and the frequency of a compressor of the air conditioner.
Optionally, the current temperature of the environment where the internal unit of the air conditioner is located is obtained, specifically: and acquiring the current temperature after the air conditioner is started to operate for a preset time.
Optionally, controlling a fan damper of the air conditioner and a compressor frequency of the air conditioner includes: during the refrigeration mode, the frequency of the compressor is reduced step by step, and then the wind gear of the fan is reduced step by step; or, during the heating mode, the first gear of the fan is reduced first, and then the first gear of the compressor is reduced.
Optionally, the stepwise downshift control includes: reducing the frequency of the compressor by one gear for operation, determining a second difference value between the current temperature and the set temperature after the frequency of the compressor is reduced by one gear, and determining whether the error between the first difference value and the second difference value exceeds a preset second temperature threshold value; and when the error exceeds the second temperature threshold, reducing the frequency of the compressor after the frequency of the compressor is reduced by one gear.
Optionally, the stepwise downshift control further includes: and circulating the steps until when the frequency of the compressor is reduced to the lowest frequency in a preset frequency range, and if the corresponding error still exceeds the second temperature threshold value, reducing the wind gear of the fan by one gear.
Optionally, the stepwise downshift control further includes: and circulating in such a way, and stopping the compressor and enabling the fan to operate according to the lowest gear if the corresponding error still exceeds the second temperature threshold value when the wind gear of the fan is reduced to the preset lowest wind gear.
Optionally, the cross downshift control includes: reducing the wind gear of the fan by one gear for operation, determining a second difference value between the current temperature after the wind gear of the fan is reduced by one gear and the set temperature, and determining whether the error between the second difference value and the first difference value exceeds a preset third temperature threshold value; when the error exceeds the third temperature threshold, reducing the frequency of the compressor by one gear, determining a third difference value between the current temperature after the frequency of the compressor is reduced by one gear and the set temperature, and determining whether the error between the third difference value and the first difference value exceeds the third temperature threshold; and when the error exceeds the third temperature threshold, reducing the wind gear of the internal machine after the wind gear of the first-gear fan is reduced by one gear.
Optionally, the cross downshift control further includes: and thus, the air level of the internal machine is reduced firstly, and then the frequency of the compressor is reduced, and the compressor is stopped and the fan is processed according to the blowing waste heat breeze until the air level of the fan is reduced to the preset lowest air level and the frequency of the compressor is reduced to the lowest frequency in the preset frequency range and if the corresponding error still exceeds the third temperature threshold value.
Optionally, the air conditioner includes: provided is a variable frequency air conditioner.
In accordance with the above method, another aspect of the present invention provides a control apparatus for an air conditioner, comprising: the judging unit is used for acquiring the current temperature and the set temperature of the environment where the indoor unit of the air conditioner is located, and determining whether a first difference value between the current temperature and the set temperature exceeds a preset first temperature threshold value; and the execution unit is used for controlling the fan gear of the air conditioner and the compressor frequency of the air conditioner when the first difference value does not exceed the first temperature threshold value.
Optionally, the determining unit is specifically: and acquiring the current temperature after the air conditioner is started to operate for a preset time.
Optionally, the execution unit includes: the cascade down-shift control module is used for reducing the frequency of the compressor step by step and then reducing the wind gear of the fan step by step in a refrigeration mode; or the cross type downshift control module is used for cross type downshift control of firstly reducing the first gear of the fan and then reducing the first gear of the compressor frequency in the heating mode.
Optionally, the progressive downshift control module includes: the first frequency control submodule is used for reducing the frequency of the compressor by one gear for operation, determining a second difference value between the current temperature and the set temperature after the frequency of the compressor is reduced by one gear, and determining whether the error between the first difference value and the second difference value exceeds a preset second temperature threshold value; and the controller is further used for reducing the frequency of the compressor after the frequency of the compressor is reduced by one gear when the error exceeds the second temperature threshold.
Optionally, the step-by-step downshift control module further includes: and the first wind gear control submodule is used for circulating in such a way until the wind gear of the fan is reduced by one gear if the corresponding error still exceeds the second temperature threshold when the frequency of the compressor is reduced to the lowest frequency in a preset frequency range.
Optionally, the step-by-step downshift control module further includes: and the first temperature point shutdown submodule is used for circulating in the way until the wind gear of the fan is reduced to a preset lowest wind gear, and stopping the compressor and enabling the fan to operate according to the lowest wind gear if the corresponding error still exceeds the second temperature threshold value.
Optionally, the cross downshift control module includes: the second wind gear control submodule is used for reducing the wind gear of the fan by one gear for operation, determining a second difference value between the current temperature and the set temperature after the wind gear of the fan is reduced by one gear, and determining whether the error between the second difference value and the first difference value exceeds a preset third temperature threshold value or not; the second frequency control submodule is used for reducing the frequency of the compressor by one gear when the error exceeds the third temperature threshold, determining a third difference value between the current temperature and the set temperature after the frequency of the compressor is reduced by one gear, and determining whether the error between the third difference value and the first difference value exceeds the third temperature threshold; and the second wind gear control submodule is also used for reducing the wind gear of the internal machine after the wind gear of the first-gear fan is reduced by one gear when the error exceeds the third temperature threshold.
Optionally, the cross downshift control module further comprises: and the second temperature point shutdown submodule is used for cycling according to the sequence of firstly reducing the wind gear of the internal machine and then reducing the frequency of the compressor until the wind gear of the fan is reduced to the preset lowest wind gear and the frequency of the compressor is reduced to the lowest frequency in the preset frequency range, and stopping the compressor if the corresponding error still exceeds the third temperature threshold value, and enabling the fan to be processed according to the breeze of the blowing waste heat.
Optionally, the air conditioner includes: provided is a variable frequency air conditioner.
In accordance with another aspect of the present invention, there is provided an air conditioner including: the control device for an air conditioner as described above.
According to the scheme, the variable frequency air conditioner has the advantages that the wind gear and the frequency coupling control are added, so that the operation of the variable frequency air conditioner is more energy-saving, intelligent and humanized, and the use comfort and the air conditioner quality are improved (for example, the energy-saving effect is improved). Here, the coupling control here only refers to a control method: the change mode of the wind gear and the frequency can also be called linkage control.
Furthermore, according to the scheme of the invention, the existing control logic is optimized, the automatic control of the wind gear is optimized, and the frequency of the compressor (namely the running frequency of the compressor) is adjusted, so that the running of the variable frequency air conditioner is more energy-saving, intelligent and humanized, and the use comfort and the air conditioner quality are improved (for example, the energy-saving effect is improved).
Furthermore, according to the scheme of the invention, after the optimized control method is adopted, the operation of the variable frequency air conditioner is more energy-saving, intelligent and humanized, and the use comfort and the air conditioner quality are improved (for example, the energy-saving effect is improved).
Therefore, according to the scheme of the invention, the control (for example, coupling control) of the inner machine air damper and the running frequency of the compressor is realized by increasing the control of the inner machine air damper, and the problem that the air damper cannot be automatically adjusted to influence the energy-saving effect in the prior art is solved, so that the defects of inconvenience in adjustment, poor energy-saving effect and poor user experience in the prior art are overcome, and the beneficial effects of convenience in adjustment, good energy-saving effect and good user experience are realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a flowchart of an embodiment of a control method for an air conditioner according to the present invention;
FIG. 2 is a flowchart of one embodiment of a progressive downshift control process in the method of the present invention;
FIG. 3 is a flow chart of one embodiment of a cross downshift control module in the method of the present invention;
fig. 4 is a schematic structural diagram of an embodiment of a control device for an air conditioner according to the present invention;
FIG. 5 is a block diagram illustrating an exemplary stepped downshift control module in the apparatus of the present invention;
FIG. 6 is a schematic block diagram of one embodiment of a cross downshift control module in the apparatus of the present invention;
FIG. 7 is a schematic diagram illustrating the control principle of the air conditioner of the present invention in the cooling mode according to an embodiment of the present invention;
fig. 8 is a schematic control principle diagram of an embodiment of the heating mode of the air conditioner of the present invention.
The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
102-an initialization unit; 104-a judging unit; 106-an execution unit; 1062-step downshift control module; 10622-a first frequency control sub-module; 10624-a first gear control sub-module; 10626-first temperature point shutdown submodule; 1064-cross downshift control module; 10642-a second gear control submodule; 10644 — a second frequency control sub-module; 10646-second temperature point shutdown submodule.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to an embodiment of the present invention, there is provided a control method for an air conditioner, as shown in fig. 1, which is a flowchart of an embodiment of the method of the present invention. The control method for an air conditioner may include:
in step S110, a current temperature and a set temperature of an environment in which an internal unit of the air conditioner is located are obtained, and it is determined whether a first difference between the current temperature and the set temperature exceeds a preset first temperature threshold.
Optionally, the air conditioner may include: provided is a variable frequency air conditioner. Through the converter in the frequency conversion air conditioner, can realize the automatically regulated of compressor frequency to promote frequency control's efficiency and effect, and then promote the convenience that the user used.
Therefore, whether the current temperature regulation meets the requirement or not is judged by acquiring the current temperature and the set temperature, the judgment mode is simple and convenient, the judgment result is good in accuracy,
optionally, in step S110, the current temperature of the environment where the internal unit of the air conditioner is located is obtained, and the specific examples may be: and acquiring the current temperature after the air conditioner is started to operate for a preset time.
For example, after a period of operation, the difference △ T between the inside ambient temperature and the set temperature is comparedc。
Therefore, the current temperature can be acquired after the air conditioner runs stably by acquiring the current temperature after the preset time of the air conditioner running, and the accuracy of the acquired current temperature and the reliability of control are improved.
In an optional example, before step S110, the method may further include: and initializing the operation mode of the air conditioner.
In one example, when the air conditioner is turned on, an internal unit of the air conditioner may be operated according to a preset wind gear, and a compressor of the air conditioner may be operated according to a highest frequency in a preset frequency range.
For example: at the beginning of starting the air conditioner, the inner fan operates according to the set wind gear, and the compressor operates at high frequency within the specified frequency operation range.
Therefore, by the initialization operation of enabling the fan to operate according to the set wind gear and enabling the compressor to operate according to the highest frequency when the air conditioner is started, feasible conditions can be provided for controlling the wind gear and the frequency, the operation mode is simple, and the reliability of the operation result is high.
At step S120, when the first difference does not exceed the first temperature threshold, controlling a fan damper of the air conditioner and a compressor frequency of the air conditioner.
The wind shield of the fan can be a set wind shield or any wind shield except the lowest wind shield; the compressor frequency may be the highest frequency or any frequency other than the lowest frequency.
For example: and (3) increasing the wind gear (such as an indoor machine wind gear) and controlling the frequency (such as the running frequency of a compressor).
For example: optimizing automatic control of the gear, and adjusting the frequency of the compressor (namely the running frequency of the compressor).
For example: taking a cooling mode as an example (opposite heating), in the control process of the inverter air conditioner, under the condition that other conditions are the same, the larger the air volume in the cooling mode (or the higher the rotating speed of a fan in the heating mode), the larger the cooling (or heating) volume in the cooling mode; under the same other conditions, the higher the compressor operating frequency in the cooling mode (or the higher the fan rotation speed in the heating mode), the greater the amount of cooling in the cooling mode (or heating in the heating mode).
Therefore, the control of the fan damper and the compressor frequency is beneficial to improving the reliability and the energy conservation of control and improving the comfort of users.
In an alternative embodiment, in step S120, controlling the fan damper of the air conditioner and the compressor frequency of the air conditioner may include: and in the refrigeration mode, the frequency of the compressor is reduced step by step, and then the wind gear of the fan is reduced step by step. Through the kick-down processing step by step to compressor frequency and fan windscreen in proper order when the mode refrigerates, can promote the travelling comfort that the user used on the one hand, on the other hand can promote energy-conserving effect.
The specific process of the step-by-step downshift control in step S120 will be further described with reference to the flowchart of fig. 2, which shows an embodiment of the step-by-step downshift control processing in the method of the present invention.
Alternatively, the specific process of the stepwise downshift control in step S120 may include: the step-by-step downshifting of the compressor frequency can be seen in the specific operations from step S210 to step S220.
Step S210, reducing the frequency of the compressor by one gear, determining a second difference between the current temperature after reducing the frequency of the compressor by one gear and the set temperature, and determining whether an error between the first difference and the second difference exceeds a preset second temperature threshold.
In one example, when the compressor frequency is the highest frequency, the highest frequency is reduced by one gear, a second difference value between the current temperature and the set temperature after the highest frequency is reduced by one gear is determined, and whether the error between the first difference value and the second difference value exceeds a preset second temperature threshold value is determined.
Step S220, when the error exceeds the second temperature threshold, decreasing the frequency of the compressor after decreasing the frequency of the first gear by the first gear.
In one example, when the compressor frequency is the highest frequency, the compressor frequency after the highest frequency is reduced by one step when the error exceeds the second temperature threshold.
For example, in the cooling mode, if △ TcNot more than first temperature threshold TAThen the compressor operation frequency is first reduced for a period of time, and the difference between the inside ambient temperature and the set temperature is compared to △ Ti(i 2, 3, 4 …) and compare △ Tc、△TiIf △ Tc-△TiSecond temperature threshold TBThen the compressor operating frequency is again reduced by one step, and the cycle is repeated.
Therefore, the temperature can be adjusted by adjusting the frequency of the compressor preferentially through downshifting the frequency of the compressor step by step, and the energy-saving effect is good.
Optionally, the specific process of the step-by-step downshift control in step S120 may further include: the specific operation of step S230 may be referred to in the process of performing the step-by-step downshift on the fan gear.
Step S230, the process is repeated (i.e., the downshift manner is repeated from step S210 to step S220), until the fan wind level is lowered by one gear if the corresponding error still exceeds the second temperature threshold when the compressor frequency has been lowered to the lowest frequency in the preset frequency range.
For example: in this cycle, when the fan gear is a set gear, when the frequency of the compressor is reduced to the lowest frequency in the preset frequency range, if the error between the first difference and the i +1 th difference after the first difference is reduced still exceeds the second temperature threshold, reducing the set gear by one gear, determining a second difference between the current temperature after the first gear is reduced and the set temperature, and determining whether the error between the first difference and the second difference exceeds the second temperature threshold; i is a natural number greater than 1, and represents the number of times of lowering by one shift for the highest frequency.
And then, when the error exceeds the second temperature threshold, reducing the wind gear of the internal machine after the wind gear of the internal machine is reduced by one gear.
For example, in the cooling mode, when the operation frequency is reduced to the set minimum operation frequency, △ T still existsc-△Ti＞TBAnd when the internal fan operates, the wind gear starts to automatically lower by one gear, the detection is still carried out according to the conditions, and the process is circulated.
From this, it is further right when the demand is not reached through adjusting the temperature at compressor frequency set for the windshield and carry out the downshift step by step to when guaranteeing energy-conserving effect, further promote the travelling comfort that the user used.
Optionally, the specific process of the step-by-step downshift control in step S120 may further include: the process of stopping the compressor when the temperature point is reached can be seen in the specific operation of step S240.
And step S240, repeating the above steps (i.e., repeating the downshift manner in step S240), until the wind level of the fan is reduced to a preset lowest wind level, and if the corresponding error still exceeds the second temperature threshold, stopping the compressor, and operating the fan according to the lowest wind level.
In one example, the operation is cycled until the wind level of the fan is reduced to a preset lowest wind level, and if the error between the first difference and the m + 1-th difference after the reduction still exceeds the second temperature threshold, the compressor is stopped, and the fan is operated according to the lowest wind level; and m is a natural number larger than 1 and represents the number of times of reducing the set wind gear by one gear.
For example: and in the refrigeration mode, when the wind gear is also reduced to the designed lowest running wind gear, the condition is still met, the compressor is stopped, and the internal machine runs according to the current lowest wind gear.
From this, when the fan wind shelves reduce to minimum wind shelves under through the refrigeration mode, stop the compressor when reaching the temperature point, can be under the prerequisite of the travelling comfort of guaranteeing the user to use, further promote energy-conserving effect.
In an alternative embodiment, in step S120, controlling a fan damper of the air conditioner and a compressor frequency of the air conditioner may further include: and in the heating mode, the fan wind gear is reduced by one gear, and then the compressor frequency is reduced by one gear. Through during the heating mode, the crossing of fan wind-shield and compressor frequency is downshifted step by step in proper order, can promote the travelling comfort that the user used on the one hand, and on the other hand can promote energy-conserving effect.
The specific process of the cross downshift control in step S120 is further described with reference to the flowchart of fig. 3, which shows an embodiment of the cross downshift control module in the method of the present invention.
Alternatively, the specific process of the cross downshift control in step S120 may include: for the process of setting the gear and the highest-frequency sequential downshift, the specific processes of step S310 to step S330 can be referred to.
Step S310, reducing the wind gear of the fan by one gear for operation, determining a second difference value between the current temperature after the wind gear of the fan is reduced by one gear and the set temperature, and determining whether an error between the second difference value and the first difference value exceeds a preset third temperature threshold value.
In one example, when the wind gear of the fan is a set wind gear, the set wind gear is reduced by one gear for operation, a second difference value between the current temperature and the set temperature after the wind gear is reduced by one gear is determined, and whether the error between the second difference value and the first difference value exceeds a preset third temperature threshold value is determined.
Step S320, when the error exceeds the third temperature threshold, reducing the frequency of the compressor by one step, determining a third difference between the current temperature after reducing the frequency of the compressor by one step and the set temperature, and determining whether the error between the third difference and the first difference exceeds the third temperature threshold.
In one example, when the compressor frequency is the highest frequency, when the error exceeds the third temperature threshold, the highest frequency is decreased by one step, and a third difference between the current temperature after the highest frequency is decreased by one step and the set temperature is determined, and whether the error between the third difference and the first difference exceeds the third temperature threshold is determined.
And step S330, when the error exceeds the third temperature threshold, reducing the wind gear of the internal machine after the wind gear of the first gear fan is reduced by the first gear.
In one example, when the error exceeds the third temperature threshold, the wind gear of the internal machine after the wind gear of the set wind gear is lowered by one gear.
For example, in heating mode, if △ ThNot more than first temperature threshold TcThe inner fan automatically reduces the first gear operation first, and then compares the difference value △ T between the inner side environment temperature and the set temperaturej(j 2, 3, 4 …) and compare △ Th、△TjIf △ Tj-△Th< third >Temperature threshold ThThe compressor operating frequency is reduced by one step.
For example: and during the heating mode, detecting and judging according to the conditions, and repeatedly executing according to the sequence of firstly reducing the air gear of the internal machine and then reducing the frequency of the compressor.
From this, through downshifting step by step to fan windshield and compressor frequency combination ground, can synthesize fan windshield and compressor frequency and adjust the temperature, user experience is good, and energy-conserving effectual.
Alternatively, the specific process of the cross downshift control in step S120 may further include: the process of stopping the compressor when the temperature point is reached can be seen in the specific process of step S340.
And step S340, the sequence of reducing the wind gear of the internal machine and then reducing the frequency of the compressor is circulated until the wind gear of the fan is reduced to a preset lowest wind gear and the frequency of the compressor is reduced to the lowest frequency in a preset frequency range, and if the corresponding error still exceeds the third temperature threshold value, the compressor is stopped, and the fan is enabled to carry out breeze treatment according to the blowing waste heat.
The waste heat blowing means that in the heating mode, when the indoor environment temperature reaches the set temperature of the air conditioning unit, the compressor is shut down, the inner side of the inner chamber is still in a high-pressure state for a short time and still has a part of heat, and therefore pressure relief is performed according to breeze treatment at the moment.
In one example, the sequence of reducing the wind level of the internal machine and then reducing the frequency of the compressor is circulated until the wind level of the fan is reduced to a preset lowest wind level and the frequency of the compressor is reduced to the lowest frequency, and if the error between the j +1 th difference value after the reduction and the first difference value still exceeds the third temperature threshold value, the compressor is stopped, and the fan is enabled to blow the residual heat and breeze; j is a natural number greater than 1, and represents the number of times of lowering by one shift for the highest frequency.
For example: when the machine is inThe wind gear and the running frequency are both reduced to the minimum and still meet △ Tj-△Th> third temperature threshold ThAnd under the condition of (3), stopping the compressor, and treating the internal machine by blowing the waste heat breeze.
From this, when fan windshield reduces to minimum windshield under the mode of heating, and the compressor frequency reduces to minimum frequency, stop the compressor when reaching the temperature point, can promote energy-conserving effect further under the prerequisite of the travelling comfort that the assurance user used.
Alternatively, the reduction of the gear of the frequency of the compressor can also reduce the gear more than one gear each time (for example, reduce two gears each time) according to the use requirement, so as to further improve the efficiency and the effect of temperature regulation.
Through a large number of tests, the technical scheme of the embodiment is adopted, and the operation of the variable frequency air conditioner is more energy-saving, intelligent and humanized by increasing the wind level and controlling the frequency, so that the use comfort and the air conditioner quality are improved (for example, the energy-saving effect is improved).
According to an embodiment of the present invention, there is also provided a control apparatus for an air conditioner corresponding to the control method for an air conditioner. Referring to fig. 4, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The control apparatus for an air conditioner may include: a judging unit 104 and an executing unit 106.
In an embodiment, the determining unit 104 may be configured to obtain a current temperature and a set temperature of an environment in which an internal unit of the air conditioner is located, and determine whether a first difference between the current temperature and the set temperature exceeds a preset first temperature threshold. The specific function and processing of the determination unit 104 are referred to in step S110.
Optionally, the air conditioner may include: provided is a variable frequency air conditioner. Through the converter in the frequency conversion air conditioner, can realize the automatically regulated of compressor frequency to promote frequency control's efficiency and effect, and then promote the convenience that the user used.
Therefore, whether the current temperature regulation meets the requirement or not is judged by acquiring the current temperature and the set temperature, the judgment mode is simple and convenient, the judgment result is good in accuracy,
optionally, the determining unit 104 may specifically be: and acquiring the current temperature after the air conditioner is started to operate for a preset time.
For example, after a period of operation, the difference △ T between the inside ambient temperature and the set temperature is comparedc。
Therefore, the current temperature can be acquired after the air conditioner runs stably by acquiring the current temperature after the preset time of the air conditioner running, and the accuracy of the acquired current temperature and the reliability of control are improved.
In an optional example, the method may further include: and an initialization unit 102 for performing initialization setting on the operation mode of the air conditioner.
In an example, the initialization unit 102 may be configured to operate an internal unit of the air conditioner according to a preset wind gear and operate a compressor of the air conditioner according to a highest frequency in a preset frequency range when the air conditioner is turned on.
For example: at the beginning of starting the air conditioner, the inner fan operates according to the set wind gear, and the compressor operates at high frequency within the specified frequency operation range.
Therefore, by the initialization operation of enabling the fan to operate according to the set wind gear and enabling the compressor to operate according to the highest frequency when the air conditioner is started, feasible conditions can be provided for controlling the wind gear and the frequency, the operation mode is simple, and the reliability of the operation result is high.
In an embodiment, the execution unit 106 may be configured to control a fan gear of the air conditioner and a compressor frequency of the air conditioner when the first difference does not exceed the first temperature threshold. The specific functions and processes of the execution unit 106 are shown in step S120.
For example: and (3) increasing the wind gear (such as an indoor machine wind gear) and controlling the frequency (such as the running frequency of a compressor).
For example: optimizing automatic control of the gear, and adjusting the frequency of the compressor (namely the running frequency of the compressor).
For example: in the control process of the variable frequency air conditioner, under the condition that other conditions are the same, the larger the air quantity in the cooling mode (or the higher the rotating speed of a fan in the heating mode), the larger the cooling (or heating) quantity in the cooling mode; under the same other conditions, the higher the compressor operating frequency in the cooling mode (or the higher the fan rotation speed in the heating mode), the greater the amount of cooling in the cooling mode (or heating in the heating mode).
Therefore, the control of the fan damper and the compressor frequency is beneficial to improving the reliability and the energy conservation of control and improving the comfort of users.
In an alternative embodiment, the execution unit 106 may include: the stepped downshift control module 1062. The progressive downshift control module 1062 may be configured to perform progressive downshift control to decrease the frequency of the compressor step by step and then decrease the fan gear step by step in the cooling mode. Through the kick-down processing step by step to compressor frequency and fan windscreen in proper order when the mode refrigerates, can promote the travelling comfort that the user used on the one hand, on the other hand can promote energy-conserving effect.
The specific structure of the step-by-step downshift control module 1062 is further described with reference to the schematic structural diagram of an embodiment of the step-by-step downshift control module in the apparatus of fig. 5.
Alternatively, the specific structure of the stepwise downshift control module 1062 may include: the first frequency control sub-module 10622 provides for a step down shift of the highest frequency.
In one example, the first frequency control sub-module 10622 decreases the frequency of the compressor by one step, determines a second difference between the current temperature and the set temperature after the frequency of the compressor is decreased by one step, and determines whether an error between the first difference and the second difference exceeds a preset second temperature threshold. The detailed function and processing of the first frequency control sub-module 10622 are shown in step S210.
For example: the first frequency control sub-module 10622 may be configured to reduce the maximum frequency by one gear, determine a second difference between the current temperature and the set temperature after the maximum frequency is reduced by one gear, and determine whether an error between the first difference and the second difference exceeds a preset second temperature threshold.
In one example, the first frequency control sub-module 10622 may be further configured to decrease the compressor frequency after decreasing the compressor frequency by one step when the error exceeds the second temperature threshold. The specific functions and processes of the first frequency control sub-module 10622 are also shown in step S220.
For example: the first frequency control sub-module 10622 may be further configured to decrease the frequency of the compressor after decreasing the first gear by the highest frequency by a first gear when the error exceeds the second temperature threshold.
For example, in the cooling mode, if △ TcNot more than first temperature threshold TAThen the operation frequency of the compressor is decreased to a first gear for a period of time, and the difference between the inside ambient temperature and the set temperature is compared to △ Ti(i 2, 3, 4 …) and compare △ Tc、△TiIf △ Tc-△TiSecond temperature threshold TBThen the compressor operating frequency is again reduced by one step, and the cycle is repeated.
Therefore, the temperature can be adjusted by adjusting the frequency of the compressor preferentially through downshifting the frequency of the compressor step by step, and the energy-saving effect is good.
Optionally, the specific structure of the stepwise downshift control module 1062 may further include: the first gear control submodule 10624 is used for performing step-by-step downshifting on the fan gear.
In one example, the first gear control sub-module 10624 may be configured to cycle (i.e., cycle in the downshifting mode from step S210 to step S220) until the fan gear is lowered by one gear if the corresponding error still exceeds the second temperature threshold when the compressor frequency has been lowered to the lowest frequency in the predetermined frequency range. The specific functions and processes of the first gear control sub-module 10624 are shown in step S230.
For example: a first gear control sub-module 10624, configured to perform a cycle of, when the compressor frequency has been decreased to a lowest frequency in the preset frequency range, decreasing the set gear by one gear if an error between the first difference and an i +1 th difference after the second decrease still exceeds the second temperature threshold, determining a second difference between the current temperature after the first gear is decreased and the set temperature, and determining whether an error between the first difference and the second difference exceeds the second temperature threshold; i is a natural number greater than 1, and represents the number of times of lowering by one shift for the highest frequency.
Furthermore, the first gear control sub-module 10624 may be further configured to, when the error exceeds the second temperature threshold, decrease the gear of the internal unit that is decreased by one gear again.
For example, in the cooling mode, when the operation frequency is reduced to the set minimum operation frequency, △ T still existsc-△Ti＞TBAnd when the internal fan operates, the wind gear starts to automatically lower by one gear, the detection is still carried out according to the conditions, and the process is circulated.
From this, it is further right when the demand is not reached through adjusting the temperature at compressor frequency set for the windshield and carry out the downshift step by step to when guaranteeing energy-conserving effect, further promote the travelling comfort that the user used.
Optionally, the specific structure of the stepwise downshift control module 1062 may further include: the first temperature point shutdown sub-module 10626 stops the compressor when the temperature point is reached.
In one example, the first temperature point shutdown submodule 10626 may be configured to cycle (i.e., cycle in a downshift manner as shown in step S240) until the fan gear is lowered to a preset minimum gear, and stop the compressor and operate the fan at the minimum gear if the corresponding error still exceeds the second temperature threshold. The specific function and processing of the first temperature point shutdown sub-module 10626 are referred to in step S240.
For example: the first temperature point shutdown submodule 10626 may be configured to, until the wind level of the fan is reduced to a preset lowest wind level, stop the compressor and enable the fan to operate according to the lowest gear if an error between the first difference and the m + 1-th difference after the wind level is reduced for the second time still exceeds the second temperature threshold; and m is a natural number larger than 1 and represents the number of times of reducing the set wind gear by one gear.
For example: and in the refrigeration mode, when the wind gear is also reduced to the designed lowest running wind gear, the condition is still met, the compressor is stopped, and the internal machine runs according to the current lowest wind gear.
From this, when setting for the windshield and reducing to minimum windshield under the refrigeration mode, stop the compressor when reaching the temperature point, can be under the prerequisite of the travelling comfort of guaranteeing the user to use, further promote energy-conserving effect.
In an optional embodiment, the execution unit 106 may further include: cross downshift control module 1064. The cross downshift control module 1064 may be configured to perform cross downshift control for reducing the frequency of the compressor after reducing the first gear of the fan in the heating mode. Through during the heating mode, the crossing of fan wind-shield and compressor frequency is downshifted step by step in proper order, can promote the travelling comfort that the user used on the one hand, and on the other hand can promote energy-conserving effect.
The specific structure of the cross downshift control module 1064 is further described below with reference to the schematic structural diagram of an embodiment of the cross downshift control module in the apparatus of fig. 6.
Alternatively, the specific structure of the cross downshift control module 1064 may include: a second gear control submodule 10642 and a second frequency control submodule 10644 to sequentially downshift the set gear and the highest frequency.
In one example, the second gear control submodule 10642 may be configured to lower the fan gear by one gear, determine a second difference between the current temperature and the set temperature after the fan gear is lowered by one gear, and determine whether an error between the second difference and the first difference exceeds a preset third temperature threshold. The specific functions and processes of the second windshield control sub-module 10642 are shown in step S310.
For example: when the wind gear of the fan is a set wind gear, the wind gear of the fan is reduced by one gear for operation, a second difference value between the current temperature and the set temperature after the wind gear of the fan is reduced by one gear is determined, and whether the error between the second difference value and the first difference value exceeds a preset third temperature threshold value is determined.
In one example, the second frequency control sub-module 10644 may be configured to decrease the compressor frequency by one step when the error exceeds the third temperature threshold, determine a third difference between the current temperature after decreasing the compressor frequency by one step and the set temperature, and determine whether the error between the third difference and the first difference exceeds the third temperature threshold. The specific functions and processes of the second frequency control sub-module 10644 are shown in step S320.
For example: when the error exceeds the third temperature threshold, reducing the highest frequency by one gear, determining a third difference value between the current temperature and the set temperature after the highest frequency is reduced by one gear, and determining whether the error between the third difference value and the first difference value exceeds the third temperature threshold.
In one example, the second gear control submodule 10642 may be further configured to decrease the gear of the internal unit after the first gear fan gear is decreased by one gear when the error exceeds the third temperature threshold. The specific function and processing of the second gear control sub-module 10642 is also referred to in step S330.
For example: when the error exceeds the third temperature threshold, reducing the wind gear of the indoor unit after the set wind gear is reduced by one gear; thus, the air level of the internal machine is reduced firstly, and then the frequency of the compressor is reduced.
For example, in heating mode, if △ ThNot more than first temperature threshold TcThe inner fan automatically reduces the first gear operation first, and then compares the difference value △ T between the inner side environment temperature and the set temperaturej(j 2, 3, 4 …) and compare △ Th、△TjIf △ Tj-△Th> third temperature threshold ThThe compressor operating frequency is reduced by one step.
For example: and during the heating mode, detecting and judging according to the conditions, and repeatedly executing according to the sequence of firstly reducing the air gear of the internal machine and then reducing the frequency of the compressor.
From this, through downshifting step by step to fan windshield and compressor frequency combination ground, can synthesize fan windshield and compressor frequency and adjust the temperature, user experience is good, and energy-conserving effectual.
Alternatively, the specific structure of the cross downshift control module 1064 may include: a second temperature point shutdown submodule 10646 shifts down the set gear and the maximum frequency in sequence.
In an example, the second temperature point shutdown submodule 10646 may be configured to cycle in the order of first reducing the internal engine wind gear and then reducing the compressor frequency, until the fan wind gear is reduced to a preset lowest wind gear and the compressor frequency is reduced to a lowest frequency in a preset frequency range, and if a corresponding error still exceeds the third temperature threshold, stop the compressor and enable the fan to perform a breeze treatment according to the blowing waste heat. The specific function and processing of the second temperature point shutdown sub-module 10646 are referred to in step S340.
The waste heat blowing means that in the heating mode, when the indoor environment temperature reaches the set temperature of the air conditioning unit, the compressor is shut down, the inner side of the inner chamber is still in a high-pressure state for a short time and still has a part of heat, and therefore pressure relief is performed according to breeze treatment at the moment.
For example: the sequence of reducing the wind gear of the internal machine and then reducing the frequency of the compressor is circulated until the wind gear of the fan is reduced to the preset lowest wind gear and the frequency of the compressor is reduced to the lowest frequency, and if the error between the j +1 th difference value after the reduction and the first difference value still exceeds the third temperature threshold value, the compressor is stopped, and the fan is enabled to carry out breeze treatment according to the blowing waste heat; j is a natural number greater than 1, and represents the number of times of lowering by one shift for the highest frequency.
For example, △ T can still be satisfied when the wind gear and the running frequency of the internal machine are both reduced to the minimumj-△Th> third temperature threshold ThAnd under the condition of (3), stopping the compressor, and treating the internal machine by blowing the waste heat breeze.
From this, when fan windshield reduces to minimum windshield under the mode of heating, and the compressor frequency reduces to minimum frequency, stop the compressor when reaching the temperature point, can promote energy-conserving effect further under the prerequisite of the travelling comfort that the assurance user used.
Alternatively, the reduction of the gear of the frequency of the compressor can also reduce the gear more than one gear each time (for example, reduce two gears each time) according to the use requirement, so as to further improve the efficiency and the effect of temperature regulation.
Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the method shown in fig. 1 to 3, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.
Through a large number of tests, the technical scheme of the invention optimizes the existing control logic, optimizes the automatic control of the wind gear, and combines the frequency adjustment of the compressor (namely the running frequency of the compressor), so that the operation of the variable frequency air conditioner is more energy-saving, intelligent and humanized, and the use comfort and the air conditioner quality are improved (for example, the energy-saving effect is improved).
According to an embodiment of the present invention, there is also provided an air conditioner corresponding to a control device for an air conditioner. The air conditioner may include: the control device for an air conditioner as described above.
For example: the air conditioner may include: provided is a variable frequency air conditioner.
In one embodiment, in the control process of the inverter air conditioner, under the same other conditions, the larger the air volume in the cooling mode (or the higher the fan rotating speed in the heating mode), the larger the cooling (or heating) volume in the cooling mode; under the same other conditions, the higher the compressor operating frequency in the cooling mode (or the higher the fan rotation speed in the heating mode), the greater the amount of cooling in the cooling mode (or heating in the heating mode).
In an example, referring to an example shown in fig. 7, in the cooling mode, a control process of the inverter air conditioner may include:
firstly, an inner fan operates according to a set wind gear, and a compressor operates at a high frequency within a specified frequency operating range.
⑵ operating for a period of time, comparing the difference △ T between the inside ambient temperature and the set temperaturec。
If △ TcNot more than first temperature threshold TAThen the compressor operation frequency is first reduced for a period of time, and the difference between the inside ambient temperature and the set temperature is compared to △ Ti(i＝2、3、4…)，And comparing △ Tc、△TiIf △ Tc-△TiSecond temperature threshold TBThen the compressor operating frequency is again reduced by one step, and the cycle is repeated.
For example, △ TiThe difference value between the inside environment temperature and the remote control set temperature detected by the current internal machine environment temperature sensing sensor at the moment i is △ TcMeans that the difference between the internal environment temperature and the set temperature reaches TATime difference controller time calculation comparison △ TcAnd △ TiAnd is different from TBAnd (6) comparing.
⑶ when the operating frequency has dropped to the set minimum operating frequency, there is still △ Tc-△Ti＞TBAnd when the internal fan operates, the wind gear starts to automatically lower by one gear, the detection is still carried out according to the conditions, and the process is circulated.
And fourthly, when the wind gear is also reduced to the designed lowest running wind gear, the compressor is stopped and the internal machine runs according to the current lowest wind gear if the conditions are still met.
In an example, referring to an example shown in fig. 8, in the heating mode, a control process of the inverter air conditioner may include:
firstly, an inner fan operates according to a set wind gear, and a compressor operates at a high frequency within a specified frequency operating range.
⑵ operating for a period of time, comparing the difference △ T between the inside ambient temperature and the set temperatureh。
If △ ThNot more than first temperature threshold TcThe inner fan automatically reduces the first gear operation first, and then compares the difference value △ T between the inner side environment temperature and the set temperaturej(j 2, 3, 4 …) and compare △ Th、△TjIf △ Tj-△Th> third temperature threshold ThThe compressor operating frequency is reduced by one step.
For example: the inside ambient temperature may be specifically a temperature detected by an indoor unit ambient temperature detection sensor.
For example, △ TjThe difference value between the inside environment temperature and the remote control set temperature detected by the current internal machine environment temperature sensing sensor at the moment i is △ ThMeans that the difference between the internal environment temperature and the set temperature reaches TcTime difference controller time calculation comparison △ ThAnd △ TjAnd is different from ThAnd (6) comparing.
And thirdly, detecting and judging according to the conditions, and repeatedly executing according to the sequence of firstly reducing the wind gear of the internal machine and then reducing the frequency of the compressor.
⑷ when the wind gear and the running frequency of the internal machine are both reduced to the minimum, △ T is still satisfiedj-△Th> third temperature threshold ThAnd under the condition of (3), stopping the compressor, and treating the internal machine by blowing the waste heat breeze.
Therefore, the wind gear (such as an internal machine wind gear) and the frequency (such as the running frequency of a compressor) are added to the existing variable frequency control method for controlling the operation of the variable frequency air conditioner, so that the operation of the variable frequency air conditioner is more energy-saving, intelligent and humanized, and the use comfort and the air conditioner quality are improved (such as the energy-saving effect is improved).
Since the processing and functions of the air conditioner of this embodiment are basically corresponding to the embodiments, principles and examples of the devices shown in fig. 4-6, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.
After a large number of tests prove that by adopting the technical scheme of the invention and the optimized control method, the operation of the variable frequency air conditioner is more energy-saving, intelligent and humanized, and the use comfort and the air conditioner quality are improved (for example, the energy-saving effect is improved).
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (19)

1. A control method for an air conditioner, characterized by comprising:
acquiring the current temperature and the set temperature of the environment where an internal unit of the air conditioner is located, and determining whether a first difference value between the current temperature and the set temperature exceeds a preset first temperature threshold value;
and when the first difference value does not exceed the first temperature threshold value, controlling a fan wind gear of the air conditioner and the frequency of a compressor of the air conditioner.
2. The method according to claim 1, characterized in that the current temperature of the environment in which the internal unit of the air conditioner is located is obtained, specifically:
and acquiring the current temperature after the air conditioner is started to operate for a preset time.
3. The method of claim 1 or 2, wherein controlling a fan damper of the air conditioner and a compressor frequency of the air conditioner comprises:
during the refrigeration mode, the frequency of the compressor is reduced step by step, and then the wind gear of the fan is reduced step by step; or,
and in the heating mode, the fan wind gear is reduced by one gear, and then the compressor frequency is reduced by one gear.
4. The method of claim 3, wherein the stepwise downshift control comprises:
reducing the frequency of the compressor by one gear for operation, determining a second difference value between the current temperature and the set temperature after the frequency of the compressor is reduced by one gear, and determining whether the error between the first difference value and the second difference value exceeds a preset second temperature threshold value;
and when the error exceeds the second temperature threshold, reducing the frequency of the compressor after the frequency of the compressor is reduced by one gear.
5. The method of claim 4, wherein the stepwise downshift control further comprises:
and circulating the steps until when the frequency of the compressor is reduced to the lowest frequency in a preset frequency range, and if the corresponding error still exceeds the second temperature threshold value, reducing the wind gear of the fan by one gear.
6. The method of claim 5, wherein the stepwise downshift control further comprises:
and circulating in such a way, and stopping the compressor and enabling the fan to operate according to the lowest gear if the corresponding error still exceeds the second temperature threshold value when the wind gear of the fan is reduced to the preset lowest wind gear.
7. The method of claim 3, wherein the cross downshift control comprises:
reducing the wind gear of the fan by one gear for operation, determining a second difference value between the current temperature after the wind gear of the fan is reduced by one gear and the set temperature, and determining whether the error between the second difference value and the first difference value exceeds a preset third temperature threshold value;
when the error exceeds the third temperature threshold, reducing the frequency of the compressor by one gear, determining a third difference value between the current temperature after the frequency of the compressor is reduced by one gear and the set temperature, and determining whether the error between the third difference value and the first difference value exceeds the third temperature threshold;
and when the error exceeds the third temperature threshold, reducing the wind gear of the internal machine after the wind gear of the first-gear fan is reduced by one gear.
8. The method of claim 7, wherein the cross downshift control further comprises:
and thus, the air level of the internal machine is reduced firstly, and then the frequency of the compressor is reduced, and the compressor is stopped and the fan is processed according to the blowing waste heat breeze until the air level of the fan is reduced to the preset lowest air level and the frequency of the compressor is reduced to the lowest frequency in the preset frequency range and if the corresponding error still exceeds the third temperature threshold value.
9. The method according to one of claims 1 to 8, wherein the air conditioner comprises: provided is a variable frequency air conditioner.
10. A control device for an air conditioner, characterized by comprising:
the judging unit is used for acquiring the current temperature and the set temperature of the environment where the indoor unit of the air conditioner is located, and determining whether a first difference value between the current temperature and the set temperature exceeds a preset first temperature threshold value;
and the execution unit is used for controlling the fan gear of the air conditioner and the compressor frequency of the air conditioner when the first difference value does not exceed the first temperature threshold value.
11. The apparatus according to claim 10, wherein the determining unit is specifically:
and acquiring the current temperature after the air conditioner is started to operate for a preset time.
12. The apparatus according to claim 10 or 11, wherein the execution unit comprises:
the cascade down-shift control module is used for reducing the frequency of the compressor step by step and then reducing the wind gear of the fan step by step in a refrigeration mode; or,
and the crossed downshift control module is used for controlling crossed downshift of the frequency of the compressor by reducing the wind gear of the fan by one gear and then reducing the frequency of the compressor by one gear when the heating mode is performed.
13. The apparatus of claim 12, wherein the progressive downshift control module comprises:
the first frequency control submodule is used for reducing the frequency of the compressor by one gear for operation, determining a second difference value between the current temperature and the set temperature after the frequency of the compressor is reduced by one gear, and determining whether the error between the first difference value and the second difference value exceeds a preset second temperature threshold value;
and the controller is further used for reducing the frequency of the compressor after the frequency of the compressor is reduced by one gear when the error exceeds the second temperature threshold.
14. The apparatus of claim 13, wherein the progressive downshift control module further comprises:
and the first wind gear control submodule is used for circulating in such a way until the wind gear of the fan is reduced by one gear if the corresponding error still exceeds the second temperature threshold when the frequency of the compressor is reduced to the lowest frequency in a preset frequency range.
15. The apparatus of claim 14, wherein the progressive downshift control module further comprises:
and the first temperature point shutdown submodule is used for circulating in the way until the wind gear of the fan is reduced to a preset lowest wind gear, and stopping the compressor and enabling the fan to operate according to the lowest wind gear if the corresponding error still exceeds the second temperature threshold value.
16. The apparatus of claim 12, wherein the cross downshift control module comprises:
the second wind gear control submodule is used for reducing the wind gear of the fan by one gear for operation, determining a second difference value between the current temperature and the set temperature after the wind gear of the fan is reduced by one gear, and determining whether the error between the second difference value and the first difference value exceeds a preset third temperature threshold value or not;
the second frequency control submodule is used for reducing the frequency of the compressor by one gear when the error exceeds the third temperature threshold, determining a third difference value between the current temperature and the set temperature after the frequency of the compressor is reduced by one gear, and determining whether the error between the third difference value and the first difference value exceeds the third temperature threshold;
and the second wind gear control submodule is also used for reducing the wind gear of the internal machine after the wind gear of the first-gear fan is reduced by one gear when the error exceeds the third temperature threshold.
17. The apparatus of claim 16, wherein the cross downshift control module further comprises:
and the second temperature point shutdown submodule is used for cycling according to the sequence of firstly reducing the wind gear of the internal machine and then reducing the frequency of the compressor until the wind gear of the fan is reduced to the preset lowest wind gear and the frequency of the compressor is reduced to the lowest frequency in the preset frequency range, and stopping the compressor if the corresponding error still exceeds the third temperature threshold value, and enabling the fan to be processed according to the breeze of the blowing waste heat.
18. The apparatus of any one of claims 10 to 17, wherein the air conditioner comprises: provided is a variable frequency air conditioner.
19. An air conditioner, comprising: the control device for an air conditioner as claimed in any one of claims 10 to 18.
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CN106839284A (en) * 2017-01-05 2017-06-13 广东美的暖通设备有限公司 Air-cooled ducted air conditioner air-conditioning system and its indoor fan control method and device
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CN108800464B (en) * 2018-06-19 2022-02-25 广东美的制冷设备有限公司 Energy-saving control method and device for air conditioner and air conditioner
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CN109556223A (en) * 2018-10-26 2019-04-02 珠海格力电器股份有限公司 Unit and method for controlling operation of unit
CN109442668A (en) * 2018-11-09 2019-03-08 奥克斯空调股份有限公司 A kind of air conditioning control method and air conditioner
CN111609527B (en) * 2019-02-26 2021-05-18 珠海格力电器股份有限公司 Air conditioner control method, calculator storage medium and air conditioner
CN111609527A (en) * 2019-02-26 2020-09-01 珠海格力电器股份有限公司 Air conditioner control method, calculator storage medium and air conditioner
CN111365822A (en) * 2020-03-26 2020-07-03 宁波奥克斯电气股份有限公司 Temperature and humidity balance control method and device and air conditioner
CN111365822B (en) * 2020-03-26 2021-05-14 宁波奥克斯电气股份有限公司 Temperature and humidity balance control method and device and air conditioner
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