CN112594902B - Control method and system of air conditioner - Google Patents
Control method and system of air conditioner Download PDFInfo
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- CN112594902B CN112594902B CN202011394432.7A CN202011394432A CN112594902B CN 112594902 B CN112594902 B CN 112594902B CN 202011394432 A CN202011394432 A CN 202011394432A CN 112594902 B CN112594902 B CN 112594902B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000007423 decrease Effects 0.000 claims description 35
- 230000003247 decreasing effect Effects 0.000 claims description 13
- 230000001276 controlling effect Effects 0.000 claims 12
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—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
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Combustion & Propulsion (AREA)
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- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method and a system of an air conditioner, when the air conditioner is in a normal running state, the temperature of a fan motor is detected through a temperature sensor on an outdoor fan motor, when the temperature of the fan motor is raised to a protection temperature, the frequency of a compressor is controlled to be reduced, and after the frequency of the compressor is reduced, the rotating speed of the fan motor is controlled to be reduced, so that the temperature of the fan motor is reduced, and meanwhile, the running effect of the air conditioner is ensured; and when the temperature of the fan motor is reduced to the normal temperature, entering the normal running state of the air conditioner. Therefore, the invention can limit the temperature of the outdoor fan motor, and can not cause the phenomenon of shutdown caused by overhigh temperature rise, meanwhile, the outdoor fan motor can not run at high temperature and overload for a long time, thereby prolonging the service life of the outdoor fan motor, and the outdoor fan motor can not be shut down and can not cause the damage of components and parts of the air conditioner caused by overhigh temperature.
Description
Technical Field
The invention belongs to the technical field of air conditioners and control thereof, and particularly relates to a control method and a control system of an air conditioner.
Background
The existing air conditioner comprises an indoor unit and an outdoor unit, wherein the outdoor unit comprises a heat exchanger, a fan, a motor, a compressor and the like, and the fan is driven by the motor to provide flowing air for the heat exchanger so as to accelerate the heat dissipation of the heat exchanger. In the prior art, an outdoor fan motor is generally divided into multiple gears for air volume control (1-7 gears), and the current fan operating gear is generally selected automatically according to the operating frequency and the outdoor environment temperature. However, when the outdoor environment temperature is bad, the outdoor fan is likely to operate at the highest gear all the time, for example, when the outdoor environment temperature is higher than the set temperature in the cooling state, the outdoor fan motor is forced to operate with the highest rotation number, and the long-time high-temperature overload operation of the outdoor fan motor not only shortens the service life of the outdoor fan motor, but also causes damage in extreme cases. In addition, the outdoor fan motor can cause high temperature and even damage of the components of the air conditioner after being stopped or damaged.
Under the condition of high-temperature refrigeration, the environment temperature of the outdoor side of the air conditioner is severe, the outdoor unit fan runs at high temperature and high load, in order to protect the outdoor fan motor, the temperature of the outdoor fan motor is also protected after the outdoor fan motor runs for a period of time under the high temperature load for a long time, generally, the scheme is a scheme for directly stopping the air conditioner in overload protection, and the scheme often influences the comfort level experience of users.
The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.
Disclosure of Invention
The invention provides a control method and a control system of an air conditioner aiming at the problems in the prior art, and aims to solve the technical problems that when the temperature of a motor of an outdoor fan of the existing air conditioner is too high, the motor is damaged, the service life is shortened, and further air conditioner components are damaged or the air conditioner is directly stopped, so that the comfort level experience of a user is poor.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a control method of an air conditioner comprises the following steps:
when the air conditioner is in a normal running state, a temperature sensor positioned on a fan motor of an outdoor unit detects the temperature of the fan motor;
controlling the frequency of a compressor to be reduced when the temperature of the fan motor is increased to a protection temperature, and controlling the rotating speed of the fan motor to be reduced after the frequency of the compressor is reduced;
entering a normal running state of the air conditioner when the temperature of the fan motor is reduced to a normal temperature; the normal temperature is less than the protection temperature.
In the control method of the air conditioner as described above, the frequency of the compressor is controlled to decrease for each set time by a set frequency, and the frequency of the compressor is decreased for a certain period of time.
In the control method of the air conditioner, the rotation speed of the fan motor is controlled to be reduced by a set range.
The control method of the air conditioner as described above controls the air conditioner to stop when the temperature of the fan motor rises to a stop temperature, which is higher than the protection temperature.
The control method of the air conditioner comprises the steps that the protection temperature at least comprises a first protection temperature and a second protection temperature, and the first protection temperature is smaller than the second protection temperature; when the temperature of the fan motor is increased to a first protection temperature, controlling the frequency of the compressor to decrease a first set frequency every first set time and keep the first time, and controlling the rotating speed of the fan motor to decrease with a first set amplitude after the frequency of the compressor is decreased; when the temperature of the fan motor is increased to a second protection temperature, controlling the frequency of the compressor to decrease a second set frequency every second set time and continue for the second time, and controlling the rotating speed of the fan motor to decrease with a second set amplitude after the frequency of the compressor decreases; the first set time is greater than the second set time, the first set frequency is less than or equal to the second set frequency, and the first time is greater than the second time; the first amplitude is less than the second amplitude.
An air conditioner, comprising:
the temperature sensor is positioned on the fan motor of the outdoor unit and used for detecting the temperature of the fan motor when the air conditioner is in a normal running state;
the control module is used for controlling the frequency of the compressor to be reduced when the temperature of the fan motor is increased to a protection temperature, and controlling the rotating speed of the fan motor to be reduced after the frequency of the compressor is reduced; the air conditioner is also used for entering a normal running state of the air conditioner when the temperature of the fan motor is reduced to a normal temperature; the normal temperature is less than the protection temperature;
and the storage module is used for storing the protection temperature and the normal temperature.
The control module is used for controlling the compressor to reduce the set frequency every set time, and the frequency of the compressor is reduced for a period of time.
In the air conditioner, the control module is used for controlling the rotating speed of the fan motor to decrease by a set range.
The control module is used for controlling the air conditioner to stop when the temperature of the fan motor is increased to a stop temperature, and the stop temperature is higher than the protection temperature.
The air conditioner as described above, wherein the protection temperature includes at least a first protection temperature and a second protection temperature, and the first protection temperature is lower than the second protection temperature; the control module is used for controlling the frequency of the compressor to decrease a first set frequency every first set time and keep the first time when the temperature of the fan motor is increased to a first protection temperature, and controlling the rotating speed of the fan motor to decrease in a first set amplitude after the frequency of the compressor is decreased; the control module is used for controlling the frequency of the compressor to decrease a second set frequency every second set time and continue for the second time when the temperature of the fan motor is increased to a second protection temperature, and controlling the rotating speed of the fan motor to decrease in a second set amplitude after the frequency of the compressor decreases; the first set time is greater than the second set time, the first set frequency is less than or equal to the second set frequency, and the first time is greater than the second time; the first amplitude is less than the second amplitude.
Compared with the prior art, the invention has the advantages and positive effects that: the control method of the air conditioner detects the temperature of the fan motor through the temperature sensor on the outdoor fan motor when the air conditioner is in a normal running state, controls the frequency of the compressor to be reduced when the temperature of the fan motor is raised to a protection temperature, and controls the rotating speed of the fan motor to be reduced after the frequency of the compressor is reduced so as to reduce the temperature of the fan motor and ensure the running effect of the air conditioner; and when the temperature of the fan motor is reduced to the normal temperature, entering the normal running state of the air conditioner. Therefore, the control method of the air conditioner can limit the temperature of the outdoor fan motor, the phenomenon of shutdown caused by overhigh temperature rise can not occur, meanwhile, the outdoor fan motor can not run at high temperature and overload for a long time, the service life of the outdoor fan motor is prolonged, the outdoor fan motor can not be shut down, and the damage of components and parts of the air conditioner caused by overhigh temperature can not be caused.
The air conditioner comprises a temperature sensor, a control module and a storage module, wherein the temperature sensor is positioned on an outdoor fan motor, the temperature sensor positioned on the outdoor fan motor detects the temperature of the fan motor when the air conditioner is in a normal running state, the control module is used for controlling the frequency of a compressor to be reduced when the temperature of the fan motor is increased to a protection temperature, and the rotating speed of the fan motor is controlled to be reduced after the frequency of the compressor is reduced so as to reduce the temperature of the fan motor and ensure the running effect of the air conditioner; the air conditioner is also used for entering a normal running state of the air conditioner when the temperature of the fan motor is reduced to normal temperature, and the storage module is used for storing the protection temperature and the normal temperature. Therefore, the air conditioner can limit the temperature of the outdoor fan motor, the phenomenon of shutdown caused by overhigh temperature rise can not occur, meanwhile, the outdoor fan motor can not run at high temperature and overload for a long time, the service life of the outdoor fan motor is prolonged, the outdoor fan motor can not be shut down, and the components of the air conditioner can not be damaged due to overhigh temperature.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
Fig. 2 is a schematic block diagram of an air conditioner according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
When the air conditioner is normally operated, the operation frequency of the compressor is generally adjusted by the difference between the indoor ambient temperature and the set temperature, and the ultimate goal is to adjust the indoor ambient temperature to the set temperature.
In order to improve the effect of the air conditioner and reduce energy consumption, an outdoor fan motor of an outdoor unit of the air conditioner is divided into multi-gear air volume control, and the current operating gear of the outdoor fan motor is automatically selected according to the operating frequency of a compressor and the outdoor environment temperature. In a refrigeration state, the higher the outdoor environment temperature is, the higher the rotating speed of the outdoor fan motor is, and under the condition of high-temperature refrigeration, the outdoor fan motor is in high-temperature and high-load operation for a long time, so that the service life of the outdoor fan motor is influenced, the outdoor fan motor is easy to damage, components in the air conditioner control box are further easy to damage after the outdoor fan motor is damaged, and the comfort level experience of a user is influenced due to shutdown caused by air conditioner overload protection.
In order to solve the above problem, the present embodiment proposes a control method of an air conditioner:
when the air conditioner is in a normal operation state, a temperature sensor on the outdoor unit fan motor detects the temperature of the fan motor.
When the temperature sensor on the fan motor detects that the fan motor is not raised to the protection temperature, the air conditioner is still in a normal operation state.
When the temperature of the fan motor rises to the protection temperature, the frequency of the compressor is controlled to be reduced, and the rotating speed of the fan motor is controlled to be reduced after the frequency of the compressor is reduced, so that the temperature of the fan motor is reduced, the fan motor is protected, and meanwhile, the air conditioner is prevented from being shut down for protection.
The embodiment must first control the frequency of the compressor to decrease, and then control the rotating speed of the fan motor to decrease, so as to prevent the air conditioning system from being stopped due to problems.
Preferably, the method of controlling the frequency drop of the compressor comprises: the frequency of the compressor is decreased for a period of time every time the set frequency is decreased. The rotational speed of the fan motor is controlled to be reduced by a set margin.
Further, the protection temperature at least comprises a first protection temperature and a second protection temperature, and the first protection temperature is smaller than the second protection temperature. In order to carry out multiple protection strategy to fan motor, when fan motor temperature is low, carry out slow protection control to the air conditioner and adjust to reduce the influence to the air conditioning effect, when fan motor temperature is high, carry out quick protection control to the air conditioner and adjust, with the temperature of quick reduction fan motor, reach the purpose of protection fan motor.
Specifically, when the temperature of the fan motor is increased to a first protection temperature, the frequency of the compressor is controlled to be reduced by a first set frequency every first set time and is continued for the first time, and after the frequency of the compressor is reduced, the rotating speed of the fan motor is controlled to be reduced by a first set amplitude.
And when the temperature of the fan motor is increased to a second protection temperature, controlling the frequency of the compressor to decrease a second set frequency every second set time and continuing for the second time, and controlling the rotating speed of the fan motor to decrease by a second set amplitude after the frequency of the compressor is decreased.
The first set time is longer than the second set time, the first set frequency is less than or equal to the second set frequency, and the first time is longer than the second time; the first amplitude is less than the second amplitude.
In order to further protect the fan motor, a stop temperature is set to the fan motor, the stop temperature corresponds to a fan motor coil damage temperature, and when the temperature of the fan motor rises to the stop temperature, the air conditioner is controlled to stop.
Wherein the stopping temperature is higher than the protection temperature. When the protection temperature is set to be plural, the stop temperature is higher than the maximum protection temperature.
Preferably, the stop temperature is any value from 115 degrees to 120 degrees.
Through the control, when the temperature of the fan motor is reduced to the normal temperature, the air conditioner enters the normal running state; wherein the normal temperature is less than the protection temperature.
Preferably, the normal temperature is any value from 85 degrees to 95 degrees.
In the following, the present embodiment will be specifically described by taking an example of setting two protection temperatures, where the first protection temperature is less than the second protection temperature, specifically, the first protection temperature is 100 degrees, and the second protection temperature is 105 degrees:
after the air conditioner is started, the air conditioner is in a normal running state.
A temperature sensor on the outdoor unit fan motor detects the temperature of the fan motor.
When the temperature sensor on the fan motor detects that the temperature of the fan motor is not increased to the protection temperature, the air conditioner is in a normal operation state.
When the temperature of the fan motor is increased to a first protection temperature (100 ℃), the frequency of the compressor is controlled to be reduced by a first set frequency (1 Hz) every first set time (15 s) and lasts for a first time (2 min), and the rotating speed of the fan motor is controlled to be reduced in a first set amplitude in a small mode after the frequency of the compressor is reduced (5 s).
And when the temperature of the fan motor is reduced to the normal temperature, entering the normal running state of the air conditioner.
If the temperature of the fan motor is not reduced, but continuously rises, when the temperature of the fan motor rises to a second protection temperature (105 ℃), controlling the frequency of the compressor to reduce a second set frequency (1 Hz) every second set time (5 s) and keep for a second time (1 min), and controlling the rotating speed of the fan motor to rapidly reduce at a second set amplitude after the frequency of the compressor is reduced (5 s).
And when the temperature of the fan motor is reduced to the normal temperature, entering the normal running state of the air conditioner.
If the temperature of the fan motor is not reduced but continuously increased, when the temperature of the fan motor is increased to a stop temperature (115 ℃), the air conditioner is controlled to stop,
specifically, as shown in fig. 1, the control method of the air conditioner of the present embodiment includes the following steps:
s1, starting an air conditioner.
And S2, the air conditioner is in a normal operation state.
And S3, detecting the temperature of the fan motor by a temperature sensor positioned on the fan motor of the outdoor unit.
S4, judging the relation between the temperature detected by the temperature sensor and the first protection temperature, the second protection temperature and the stop temperature:
when the temperature detected by the temperature sensor is lower than the first protection temperature, the step S2 is executed;
when the temperature detected by the temperature sensor is greater than or equal to the first protection temperature and less than the second protection temperature, the step S5 is executed;
when the temperature detected by the temperature sensor is equal to or higher than the second protection temperature and lower than the stop temperature, the process proceeds to step S6.
When the temperature detected by the temperature sensor is equal to or higher than the stop temperature, the process proceeds to step S7.
And S5, controlling the frequency of the compressor to reduce the first set frequency every first set time and keep the first time, and controlling the rotating speed of the fan motor to reduce in a small way by a first set amplitude after the frequency of the compressor is reduced. The process advances to step S8.
And S6, controlling the frequency of the compressor to reduce the second set frequency every second set time and continue the second time, and after the frequency of the compressor is reduced, controlling the rotating speed of the fan motor to rapidly reduce in a second set amplitude. The process advances to step S8.
And S7, stopping the machine.
And S8, judging whether the temperature of the fan motor is reduced to the normal temperature, if so, entering the step S2, otherwise, entering the step S4.
The control method of the air conditioner can limit the temperature of the outdoor fan motor under the condition of high-temperature refrigeration of the air conditioner, the phenomenon of shutdown caused by overhigh temperature rise can not occur, meanwhile, the outdoor fan motor can not run at high temperature and overload for a long time, the service life of the outdoor fan motor is prolonged, the outdoor fan motor can not be shut down, and the components of the air conditioner can not be damaged due to overhigh temperature.
As shown in fig. 2, the present embodiment further provides an air conditioner, including:
and the temperature sensor is positioned on the fan motor of the outdoor unit and used for detecting the temperature of the fan motor when the air conditioner is in a normal running state.
The control module is used for controlling the air conditioner to be in a normal running state when the temperature of the fan motor is at a normal temperature, namely, when the temperature is not increased to a protection temperature.
The control module is used for firstly controlling the frequency of the compressor to be reduced when the temperature of the fan motor is increased to the protection temperature, and then controlling the rotating speed of the fan motor to be reduced after the frequency of the compressor is reduced so as to reduce the temperature of the fan motor, protect the fan motor and simultaneously avoid the shutdown protection of the air conditioner.
The control module of the embodiment must firstly control the frequency of the compressor to be reduced and then control the rotating speed of the fan motor to be reduced, so that the air conditioning system can be prevented from being stopped due to problems.
The control module is used for entering the normal running state of the air conditioner when the temperature of the fan motor is reduced to the normal temperature.
Wherein the normal temperature is less than the protection temperature.
Preferably, the normal temperature is any value from 85 degrees to 95 degrees.
And the storage module is used for storing the protection temperature and the normal temperature.
Preferably, the control module is configured to control the compressor to decrease the set frequency every set time, and the frequency of the compressor is decreased for a period of time.
The control module is used for controlling the rotating speed of the fan motor to be reduced in a set range.
Further, the protection temperature at least comprises a first protection temperature and a second protection temperature, and the first protection temperature is smaller than the second protection temperature. In order to carry out multiple protection strategy to fan motor, when fan motor temperature is low, carry out protection control slowly and adjust to the air conditioner to reduce the influence to the air conditioner effect, when fan motor temperature is high, carry out quick protection control to the air conditioner and adjust, with the temperature of quick reduction fan motor, reach protection fan motor's purpose.
Specifically, the control module is used for controlling the frequency of the compressor to decrease a first set frequency every first set time and keep the first time when the temperature of the fan motor is increased to a first protection temperature, and controlling the rotating speed of the fan motor to decrease with a first set amplitude after the frequency of the compressor decreases.
The control module is used for controlling the frequency of the compressor to decrease a second set frequency every second set time and continue for the second time when the temperature of the fan motor is increased to a second protection temperature, and controlling the rotating speed of the fan motor to decrease in a second set amplitude after the frequency of the compressor decreases.
The first set time is greater than the second set time, the first set frequency is less than or equal to the second set frequency, and the first time is greater than the second time; the first amplitude is less than the second amplitude.
In order to further protect the fan motor, a stop temperature is set for the fan motor in the storage module, wherein the stop temperature corresponds to the damage temperature of the coil of the fan motor. The control module is used for controlling the air conditioner to stop when the temperature of the fan motor is increased to the stop temperature.
Wherein the stop temperature is higher than the protection temperature. When the protection temperature is set to be plural, the stop temperature is higher than the maximum protection temperature.
Preferably, the stop temperature is any value of 115 to 120 degrees.
The air conditioner of the embodiment can limit the temperature of the outdoor fan motor, the phenomenon of shutdown caused by overhigh temperature rise can be avoided, meanwhile, the outdoor fan motor can not run at high temperature and overload for a long time, the service life of the outdoor fan motor is prolonged, the outdoor fan motor can not be shut down, and the damage of components and parts of the air conditioner due to overhigh temperature can be avoided.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for some of the features thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A control method of an air conditioner is characterized in that:
when the air conditioner is in a normal running state, the running frequency of the compressor is adjusted through the difference value between the indoor environment temperature and the set temperature, the running gear of the outdoor unit fan motor is selected according to the running frequency of the compressor and the outdoor environment temperature, and the temperature of the fan motor is detected by a temperature sensor positioned on the outdoor unit fan motor;
controlling the frequency of a compressor to be reduced when the temperature of the fan motor is increased to a protection temperature, and controlling the rotating speed of the fan motor to be reduced after the frequency of the compressor is reduced;
when the temperature of the fan motor is reduced to the normal temperature, the air conditioner enters a normal running state, and the running frequency of the compressor is adjusted through the difference value of the indoor environment temperature and the set temperature; the normal temperature is less than the protection temperature.
2. The control method of an air conditioner according to claim 1, wherein the frequency of the compressor is controlled to be decreased by a set frequency per set time, the frequency of the compressor being decreased for a period of time.
3. The control method of an air conditioner according to claim 1, wherein the rotation speed of the fan motor is controlled to be decreased by a set margin.
4. The control method of an air conditioner according to claim 1, wherein the air conditioner is controlled to be stopped when the temperature of the fan motor rises to a stop temperature, which is higher than the protection temperature.
5. The control method of an air conditioner according to any one of claims 1 to 4, wherein the protection temperature includes at least a first protection temperature and a second protection temperature, the first protection temperature being less than the second protection temperature; when the temperature of the fan motor is increased to a first protection temperature, controlling the frequency of the compressor to decrease a first set frequency every first set time and keep the first time, and controlling the rotating speed of the fan motor to decrease with a first set amplitude after the frequency of the compressor is decreased; when the temperature of the fan motor is increased to a second protection temperature, controlling the frequency of the compressor to decrease a second set frequency every second set time and continue for the second time, and controlling the rotating speed of the fan motor to decrease with a second set amplitude after the frequency of the compressor decreases; the first set time is greater than the second set time, the first set frequency is less than or equal to the second set frequency, and the first time is greater than the second time; the first amplitude is less than the second amplitude.
6. An air conditioner, characterized in that the air conditioner comprises:
a temperature sensor on the outdoor unit fan motor for detecting the temperature of the fan motor;
the control module is used for adjusting the running frequency of the compressor through the difference value of the indoor environment temperature and the set temperature when the air conditioner is in the normal running state; the control device is used for selecting the running gear of the outdoor unit fan motor according to the running frequency of the compressor and the outdoor environment temperature; the fan control system is used for controlling the frequency of the compressor to be reduced when the temperature of the fan motor is increased to a protection temperature, and controlling the rotating speed of the fan motor to be reduced after the frequency of the compressor is reduced; the air conditioner is also used for entering a normal running state of the air conditioner when the temperature of the fan motor is reduced to the normal temperature, and regulating the running frequency of the compressor through the difference value of the indoor environment temperature and the set temperature; the normal temperature is lower than the protection temperature;
and the storage module is used for storing the protection temperature and the normal temperature.
7. The air conditioner according to claim 6, wherein the control module is configured to control the compressor to decrease the set frequency for a set period of time, the frequency of the compressor decreasing for a set period of time.
8. The air conditioner of claim 6, wherein the control module is configured to control the speed of the fan motor to decrease by a set amount.
9. The air conditioner according to claim 6, wherein the control module is configured to control the air conditioner to be shut down when the temperature of the fan motor rises to a stop temperature, the stop temperature being higher than the protection temperature.
10. The air conditioner according to any one of claims 6 to 9, wherein the protection temperature includes at least a first protection temperature and a second protection temperature, the first protection temperature being less than the second protection temperature; the control module is used for controlling the frequency of the compressor to decrease a first set frequency every first set time and keep the first time when the temperature of the fan motor is increased to a first protection temperature, and controlling the rotating speed of the fan motor to decrease in a first set amplitude after the frequency of the compressor is decreased; the control module is used for controlling the frequency of the compressor to decrease a second set frequency every second set time and continue for the second time when the temperature of the fan motor is increased to a second protection temperature, and controlling the rotating speed of the fan motor to decrease in a second set amplitude after the frequency of the compressor decreases; the first set time is longer than the second set time, the first set frequency is less than or equal to the second set frequency, and the first time is longer than the second time; the first amplitude is less than the second amplitude.
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| CN113251597A (en) * | 2021-04-19 | 2021-08-13 | 青岛海尔空调器有限总公司 | Control method of fan blade structure, air conditioner electronic equipment and storage medium |
| CN115076888B (en) * | 2022-05-07 | 2023-10-20 | 宁波奥克斯电气股份有限公司 | Motor temperature control method and device and air conditioner |
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