CN112503734A - Temperature control method and device of air conditioner, storage medium and processor - Google Patents
Temperature control method and device of air conditioner, storage medium and processor Download PDFInfo
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- CN112503734A CN112503734A CN202011385826.6A CN202011385826A CN112503734A CN 112503734 A CN112503734 A CN 112503734A CN 202011385826 A CN202011385826 A CN 202011385826A CN 112503734 A CN112503734 A CN 112503734A
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20209—Thermal management, e.g. fan control
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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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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a temperature control method and device of an air conditioner, the air conditioner, a storage medium and a processor, wherein the method comprises the following steps: acquiring the current temperature of a heating device in the air conditioner; the heat generating device includes: the power module, the radiator, the PCB and the inductor of the PFC circuit; the current temperature of the heating device is the minimum temperature of the temperatures of the heating device; determining whether the current temperature of the heating device is greater than or equal to a first preset temperature value; if the current temperature of the heating device is greater than or equal to the first preset temperature value, controlling a cooling fan of the air conditioner to operate according to a set high wind gear; and if the current temperature of the heating device is lower than the first preset temperature value, controlling a cooling fan of the air conditioner to operate according to a set low wind gear. According to the scheme, the power device is in the safe working temperature range, and the power device can be prevented from being damaged due to overheating.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a temperature control method and device of an air conditioner, the air conditioner, a storage medium and a processor, in particular to a method and device for controlling the system graded cooling of a variable frequency air conditioner, the storage medium and the processor.
Background
The frequency conversion air conditioner is more and more popular in the market, including some high temperature working condition areas, and the application of the frequency conversion air conditioner is more and more extensive.
In an electric control system (such as an air conditioner controller system) of the inverter air conditioner, there are Power devices such as an IPM (Intelligent Power Module), an IGBT (Insulated Gate Bipolar Transistor), a rectifier bridge, and a fast recovery diode, and these Power devices generate a large amount of heat during operation, which is very likely to cause overheating damage.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention aims to provide a temperature control method and device of an air conditioner, the air conditioner, a storage medium and a processor, so as to solve the problem that a power device generates a large amount of heat during working and is easy to overheat and damage, and achieve the effect of avoiding overheat and damage of the power device by enabling the power device to be in a safe working temperature range.
The invention provides a temperature control method of an air conditioner, which comprises the following steps: acquiring the current temperature of a heating device in the air conditioner; the heat generating device includes: the power module, the radiator, the PCB and the inductor of the PFC circuit; the current temperature of the heating device is the minimum temperature of the temperatures of the heating device; determining whether the current temperature of the heating device is greater than or equal to a first preset temperature value; if the current temperature of the heating device is greater than or equal to the first preset temperature value, controlling a cooling fan of the air conditioner to operate according to a set high wind gear; and if the current temperature of the heating device is lower than the first preset temperature value, controlling a cooling fan of the air conditioner to operate according to a set low wind gear.
In some embodiments, further comprising: after controlling a cooling fan of the air conditioner to operate for a first set time according to a set high wind level, determining whether the current temperature of the heating device is reduced to be less than or equal to a second preset temperature value; and if the current temperature of the heating device is reduced to the second preset temperature value, controlling a cooling fan of the air conditioner to operate according to a preset low wind gear.
In some embodiments, further comprising: if the current temperature of the heating device is not reduced to the second preset temperature value, determining whether the current temperature of the heating device is increased to be greater than or equal to a third preset temperature value; and if the current temperature of the heating device is increased to be greater than or equal to a third preset temperature value, continuously controlling a cooling fan of the air conditioner to operate according to a set high wind gear, and controlling a compressor of the air conditioner to reduce a set frequency to operate.
In some embodiments, further comprising: after continuing to control the cooling fan of the air conditioner to operate according to a set high wind level and controlling the compressor of the air conditioner to operate for a second set time by reducing a set frequency, determining whether the current temperature of the heating device is reduced to be less than or equal to a fourth preset temperature value; and if the current temperature of the heating device is reduced to be less than or equal to a fourth preset temperature value, continuing to control a compressor of the air conditioner to reduce the set frequency to operate, and controlling a cooling fan of the air conditioner to operate according to a set low wind level.
In some embodiments, further comprising: if the current temperature of the heating device is not reduced to be less than or equal to a fourth preset temperature value, determining whether the current temperature of the heating device is still higher than the third preset temperature value and is increased to be greater than or equal to a fifth preset temperature value; and if the current temperature of the heating device is still higher than a third preset temperature value and is increased to be greater than or equal to a fifth preset temperature value, controlling the air conditioner to stop.
In accordance with the above method, another aspect of the present invention provides a temperature control apparatus for an air conditioner, comprising: an acquisition unit configured to acquire a current temperature of a heat generating device in the air conditioner; the heat generating device includes: the power module, the radiator, the PCB and the inductor of the PFC circuit; the current temperature of the heating device is the minimum temperature of the temperatures of the heating device; a control unit configured to determine whether a current temperature of the heat generating device is greater than or equal to a first preset temperature value; the control unit is also configured to control a cooling fan of the air conditioner to operate according to a set high wind gear if the current temperature of the heating device is greater than or equal to the first preset temperature value; the control unit is further configured to control the cooling fan of the air conditioner to operate according to a set low wind gear if the current temperature of the heating device is smaller than the first preset temperature value.
In some embodiments, further comprising: the control unit is further configured to determine whether the current temperature of the heating device is reduced to be less than or equal to a second preset temperature value after controlling a cooling fan of the air conditioner to operate for a first set time according to a set high wind gear; the control unit is further configured to control the cooling fan of the air conditioner to operate according to a preset low wind level if the current temperature of the heating device is reduced to the second preset temperature value.
In some embodiments, further comprising: the control unit is further configured to determine whether the current temperature of the heat generating device has increased to be greater than or equal to a third preset temperature value if the current temperature of the heat generating device has not decreased to the second preset temperature value; the control unit is further configured to continue to control the cooling fan of the air conditioner to operate according to a set high wind gear and control the compressor of the air conditioner to operate at a set frequency if the current temperature of the heating device is increased to be greater than or equal to a third preset temperature value.
In some embodiments, further comprising: the control unit is further configured to determine whether the current temperature of the heating device is reduced to be less than or equal to a fourth preset temperature value after continuing to control the cooling fan of the air conditioner to operate according to a set high wind level and controlling the compressor of the air conditioner to operate at a set frequency for a second set time; the control unit is further configured to continue to control the compressor of the air conditioner to operate at a set frequency and control the cooling fan of the air conditioner to operate at a set low wind level if the current temperature of the heating device is reduced to be less than or equal to a fourth preset temperature value.
In some embodiments, further comprising: the control unit is further configured to determine whether the current temperature of the heat generating device is still higher than a third preset temperature value and has been increased to be greater than or equal to a fifth preset temperature value if the current temperature of the heat generating device is not decreased to be less than or equal to a fourth preset temperature value; the control unit is further configured to control the air conditioner to stop if the current temperature of the heat generating device is still higher than a third preset temperature value and is increased to be greater than or equal to a fifth preset temperature value.
In accordance with another aspect of the present invention, there is provided an air conditioner including: the temperature control device of the air conditioner is described above.
In accordance with the above method, a further aspect of the present invention provides a storage medium, which includes a stored program, wherein when the program runs, an apparatus in which the storage medium is located is controlled to execute the above temperature control method of the air conditioner.
In accordance with the above method, a further aspect of the present invention provides a processor for executing a program, wherein the program executes the above method for controlling the temperature of the air conditioner.
Therefore, according to the scheme of the invention, the temperature of the power device, the radiator, the PCB and the PFC inductor in the air conditioner controller system is detected, the air conditioner controller system can be cooled in a grading manner in different cooling modes at different temperatures, the rapid cooling is realized, and the power device is in a safe working temperature range, so that the power device can be prevented from being damaged due to overheating.
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 schematic flow chart illustrating a method for controlling temperature of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating an embodiment of a first control process for controlling the cooling fan to operate at a high wind speed according to the method of the present invention;
FIG. 3 is a flowchart illustrating an embodiment of a second control process for controlling the cooling fan to operate at a high wind speed according to the method of the present invention;
FIG. 4 is a flowchart illustrating an embodiment of a first continuing control process after controlling a compressor of the air conditioner to operate at a reduced set frequency according to the method of the present invention;
FIG. 5 is a flowchart illustrating an embodiment of a second continuation control process after controlling the compressor of the air conditioner to operate at a reduced set frequency according to the method of the present invention;
FIG. 6 is a schematic structural diagram of an embodiment of a temperature control device of an air conditioner according to the present invention;
FIG. 7 is a schematic diagram of an embodiment of a temperature protection circuit of an air conditioner controller system;
FIG. 8 is a flowchart illustrating an embodiment of a cooling method for an air conditioner controller system.
The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
102-an obtaining unit; 104-control unit.
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, a method for controlling temperature of an air conditioner is provided, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method of the present invention. The temperature control method of the air conditioner may include: step S110 to step S140.
At step S110, the current temperature of the heat generating device in the air conditioner is acquired. The heat generating device includes: the inductor of power module, radiator, PCB board and PFC circuit. The current temperature of the heat generating device is a minimum temperature among temperatures of the heat generating device.
At step S120, it is determined whether the current temperature of the heat generating device is greater than or equal to a first preset temperature value.
In step S130, if the current temperature of the heating device is greater than or equal to the first preset temperature value, the cooling fan of the air conditioner is controlled to operate according to a set high wind gear, that is, the cooling fan of the air conditioner is controlled to operate at a higher rotation speed.
In step S140, if the current temperature of the heating device is lower than the first preset temperature value, the cooling fan of the air conditioner is controlled to operate according to a set low wind gear.
Specifically, the air conditioner controller system obtains each sampled temperature value T (i.e. the minimum value of each sampled temperature) and compares the temperature value T with a first preset temperature value T1: if the obtained temperature T is less than a first preset temperature value T1, the air conditioner is always in a normal working state, and the cooling fan works on a low windshield. When the obtained temperature T is larger than or equal to a first preset temperature value T1, the cooling fan increases the rotating speed to start working to cool the air conditioner controller system, and the air conditioner controller system can be cooled.
Therefore, the air conditioner controller system can realize graded cooling by adopting different cooling modes at different temperatures by detecting the temperature according to the power module, the radiator, the PCB and the PFC inductor of the air conditioner controller system, and realize rapid cooling by adopting a mode of changing the operation mode of the whole machine and combining the rotating speed of the cooling fan; the power device is in a safe working temperature range, the problem of overheating and damage of the power device is effectively solved, and the reliable operation of the air conditioner is ensured.
In some embodiments, further comprising: and controlling the first continuous control process after the cooling fan operates according to the high wind gear, namely controlling the first continuous control process after the cooling fan operates according to the high wind gear under the condition that the current temperature is higher than a first preset temperature value.
With reference to the flowchart of fig. 2 showing an embodiment of a second continuous control process after the cooling fan is controlled to operate at a high wind gear in the method of the present invention, a specific process of the second continuous control process after the cooling fan is controlled to operate at a high wind gear will be further described, which includes: step S210 and step S220.
Step S210, after controlling the cooling fan of the air conditioner to operate for a first set time according to a set high wind level, determining whether the current temperature of the heating device is reduced to be less than or equal to a second preset temperature value.
Step S220, if the current temperature of the heating device has decreased to the second preset temperature value, controlling the cooling fan of the air conditioner to operate according to a preset low wind level.
Specifically, after the air conditioner works for a certain time, when the temperature T obtained by the air conditioner controller system is less than or equal to a second preset temperature value T2, it indicates that the heat dissipation effect of the heat dissipation fan is obvious, the air conditioner controller system obtains good heat dissipation, at this time, the heat dissipation fan works at a low windshield, and the second preset temperature value T2 is less than the first preset temperature value T1. The second preset temperature value T2 is limited to be less than the first preset temperature value T1, so as to prevent the service life of the cooling fan from being affected by frequent actions of the cooling fan when the obtained temperature T fluctuates between the first preset temperature value T1 and the lower part.
In some embodiments, further comprising: and controlling the second continuous control process after the cooling fan operates according to the high wind gear, namely controlling the second continuous control process after the cooling fan operates according to the high wind gear under the condition that the current temperature is higher than the first preset temperature value.
With reference to the flowchart of fig. 3 showing an embodiment of a second continuous control process after the cooling fan is controlled to operate at a high wind gear in the method of the present invention, a specific process of the second continuous control process after the cooling fan is controlled to operate at a high wind gear will be further described, which includes: step S310 and step S320.
Step S310, if the current temperature of the heat generating device is not decreased to the second preset temperature value, determining whether the current temperature of the heat generating device has been increased to be greater than or equal to a third preset temperature value.
And step S320, if the current temperature of the heating device is increased to be greater than or equal to a third preset temperature value, continuing to control the cooling fan of the air conditioner to operate according to a set high wind gear, and controlling the compressor of the air conditioner to operate at a set frequency.
Specifically, after the air conditioner works for a certain time, when the temperature T obtained by the air conditioner controller system is greater than or equal to a third preset temperature value T3, and the first preset temperature value T1 is greater than the third preset temperature value T3, the heat dissipation fan works in a high-windshield mode to cool the controller system, at the temperature, the fact that the work of the heat dissipation fan for increasing the wind speed cannot meet the current requirement of the controller system is indicated, at the moment, the working frequency of the compressor obtained according to a conventional frequency calculation method is limited, and the working frequency after the frequency limitation is used as the actual working frequency to control the compressor to run. The air speed of the heat dissipation fan is increased under the frequency reduction mode of the whole air conditioner to dissipate heat of the controller system, and the overall temperature of the air conditioner controller system can be effectively reduced.
In some embodiments, further comprising: and controlling a first continuous control process after the compressor of the air conditioner operates at the reduced set frequency, namely, continuously controlling the cooling fan of the air conditioner to operate according to the set high wind gear and controlling the compressor of the air conditioner to operate at the reduced set frequency under the condition that the current temperature is increased to be greater than or equal to a third preset temperature value.
With reference to the flowchart of fig. 4 showing an embodiment of the first continuous control process after the compressor of the air conditioner is controlled to operate at the reduced set frequency in the method of the present invention, a specific process of the first continuous control process after the compressor of the air conditioner is controlled to operate at the reduced set frequency is further described, which includes: step S410 and step S420.
And step S410, after the cooling fan of the air conditioner is continuously controlled to operate according to the set high wind level and the compressor of the air conditioner is controlled to reduce the set frequency and operate for a second set time, determining whether the current temperature of the heating device is reduced to be less than or equal to a fourth preset temperature value.
And step S420, if the current temperature of the heating device is reduced to be less than or equal to a fourth preset temperature value, continuing to control a compressor of the air conditioner to reduce the set frequency to operate, and controlling a cooling fan of the air conditioner to operate according to a set low wind level.
Specifically, in the frequency-reducing mode, after the high windshield of the cooling fan works for a certain time, when the temperature T obtained by the controller is less than or equal to a fourth preset temperature value T4, the whole machine is controlled to work in the frequency-limiting mode, the cooling fan works in the low windshield, and meanwhile, the fourth preset temperature value T4 is less than the first preset temperature value T1. The limiting mode can ensure that the temperature in the air conditioner controller system does not exceed the temperature during starting temperature protection, and prevent the air conditioner controller system from not working normally when the air conditioner controller system is protected from starting temperature, so that the working efficiency of the variable frequency air conditioner is influenced.
In some embodiments, further comprising: and controlling a second continuous control process after the compressor of the air conditioner operates at the reduced set frequency, namely, continuously controlling the cooling fan of the air conditioner to operate according to the set high wind gear and controlling the compressor of the air conditioner to operate at the reduced set frequency under the condition that the current temperature is increased to be greater than or equal to a third preset temperature value.
With reference to the flowchart of fig. 5, a specific process of the second continuous control process after the compressor of the air conditioner is controlled to operate at the reduced set frequency is further described, where the specific process includes: step S510 and step S520.
Step S510, if the current temperature of the heat generating device is not decreased to be less than or equal to a fourth preset temperature value, determining whether the current temperature of the heat generating device is still higher than the third preset temperature value and has been increased to be greater than or equal to a fifth preset temperature value.
Step S520, if the current temperature of the heating device is still higher than the third preset temperature value and is increased to be greater than or equal to a fifth preset temperature value, controlling the air conditioner to stop.
Specifically, in the frequency reduction mode, when the temperature T obtained by the controller is greater than or equal to a fifth preset temperature value T5, and the third preset temperature value T3 is less than a fifth preset temperature value T5, the whole air conditioner is controlled to be shut down for protection in the frequency reduction mode, so that Power devices such as IPM (Intelligent Power Module), IGBT (Insulated Gate Bipolar Transistor), rectifier bridge, and fast recovery diode are prevented from being burned out due to excessive temperature, and the service life of the air conditioner is prevented from being affected.
Through a large amount of tests, the technical scheme of the embodiment is adopted, temperature detection is carried out on the power device, the radiator, the PCB and the PFC inductor in the air conditioner controller system, the air conditioner controller system can be cooled in a grading mode in different temperatures, rapid cooling is achieved, and the power device is enabled to be in a safe working temperature range, so that overheating damage of the power device can be avoided.
According to an embodiment of the present invention, there is also provided a temperature control apparatus of an air conditioner corresponding to the temperature control method of the air conditioner. Referring to fig. 6, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The temperature control apparatus of the air conditioner may include: an acquisition unit 102 and a control unit 104.
Wherein, the obtaining unit 102 is configured to obtain a current temperature of a heat generating device in the air conditioner. The heat generating device includes: the inductor of power module, radiator, PCB board and PFC circuit. The current temperature of the heat generating device is a minimum temperature among temperatures of the heat generating device. The specific functions and processes of the acquiring unit 102 are referred to in step S110.
A control unit 104 configured to determine whether a current temperature of the heat generating device is greater than or equal to a first preset temperature value. The specific function and processing of the control unit 104 are referred to in step S120.
The control unit 104 is further configured to control the cooling fan of the air conditioner to operate according to a set high wind gear, that is, control the cooling fan of the air conditioner to operate at a higher rotation speed, if the current temperature of the heating device is greater than or equal to the first preset temperature value. The specific function and processing of the control unit 104 are also referred to in step S130.
The control unit 104 is further configured to control the cooling fan of the air conditioner to operate according to a set low wind level if the current temperature of the heating device is less than the first preset temperature value. The specific function and processing of the control unit 104 are also referred to in step S140.
Specifically, the air conditioner controller system obtains each sampled temperature value T (i.e. the minimum value of each sampled temperature) and compares the temperature value T with a first preset temperature value T1: if the obtained temperature T is less than a first preset temperature value T1, the air conditioner is always in a normal working state, and the cooling fan works on a low windshield. When the obtained temperature T is larger than or equal to a first preset temperature value T1, the cooling fan increases the rotating speed to start working to cool the air conditioner controller system, and the air conditioner controller system can be cooled.
Therefore, the air conditioner controller system can realize graded cooling by adopting different cooling modes at different temperatures by detecting the temperature according to the power module, the radiator, the PCB and the PFC inductor of the air conditioner controller system, and realize rapid cooling by adopting a mode of changing the operation mode of the whole machine and combining the rotating speed of the cooling fan; the power device is in a safe working temperature range, the problem of overheating and damage of the power device is effectively solved, and the reliable operation of the air conditioner is ensured.
In some embodiments, further comprising: the method comprises the following steps of controlling a first continuous control process of the cooling fan after the cooling fan operates according to a high wind gear, namely controlling the first continuous control process of the cooling fan after the cooling fan operates according to the high wind gear under the condition that the current temperature is higher than a first preset temperature value, and specifically comprising the following steps:
the control unit 104 is further configured to determine whether the current temperature of the heat generating device has been reduced to be less than or equal to a second preset temperature value after controlling the cooling fan of the air conditioner to operate for a first set time according to a set high wind gear. The specific functions and processes of the control unit 104 are also referred to in step S210.
The control unit 104 is further configured to control the cooling fan of the air conditioner to operate at a preset low wind level if the current temperature of the heating device has been reduced to the second preset temperature value. The specific functions and processes of the control unit 104 are also referred to in step S220.
Specifically, after the air conditioner works for a certain time, when the temperature T obtained by the air conditioner controller system is less than or equal to a second preset temperature value T2, it indicates that the heat dissipation effect of the heat dissipation fan is obvious, the air conditioner controller system obtains good heat dissipation, at this time, the heat dissipation fan works at a low windshield, and the second preset temperature value T2 is less than the first preset temperature value T1. The second preset temperature value T2 is limited to be less than the first preset temperature value T1, so as to prevent the service life of the cooling fan from being affected by frequent actions of the cooling fan when the obtained temperature T fluctuates between the first preset temperature value T1 and the lower part.
In some embodiments, further comprising: controlling the second continuous control process of the cooling fan after the cooling fan operates according to the high wind gear, namely controlling the second continuous control process of the cooling fan after the cooling fan operates according to the high wind gear under the condition that the current temperature is higher than a first preset temperature value, and specifically comprising the following steps:
the control unit 104 is further configured to determine whether the current temperature of the heat generating device has increased to be greater than or equal to a third preset temperature value if the current temperature of the heat generating device has not decreased to the second preset temperature value. The specific functions and processes of the control unit 104 are also referred to in step S310.
The control unit 104 is further configured to continue to control the cooling fan of the air conditioner to operate according to a set high wind gear and control the compressor of the air conditioner to operate at a set frequency if the current temperature of the heating device has been increased to be greater than or equal to a third preset temperature value. The specific functions and processes of the control unit 104 are also referred to in step S320.
Specifically, after the air conditioner works for a certain time, when the temperature T obtained by the air conditioner controller system is greater than or equal to a third preset temperature value T3, and the first preset temperature value T1 is less than the third preset temperature value T3, the heat dissipation fan works in a high-windshield mode to cool the controller system, at the temperature, the fact that the work of the heat dissipation fan for increasing the wind speed cannot meet the current requirement of the controller system is indicated, at the moment, the working frequency of the compressor obtained according to a conventional frequency calculation device is limited, and the working frequency after the frequency limitation is used as the actual working frequency to control the compressor to run. The air speed of the heat dissipation fan is increased under the frequency reduction mode of the whole air conditioner to dissipate heat of the controller system, and the overall temperature of the air conditioner controller system can be effectively reduced.
In some embodiments, further comprising: controlling a first continuous control process after the compressor of the air conditioner operates at the reduced set frequency, namely, continuously controlling the cooling fan of the air conditioner to operate according to the set high wind gear and controlling the compressor of the air conditioner to operate at the reduced set frequency under the condition that the current temperature is increased to be greater than or equal to a third preset temperature value, wherein the first continuous control process comprises the following specific steps:
the control unit 104 is further configured to determine whether the current temperature of the heat generating device has been reduced to be less than or equal to a fourth preset temperature value after continuing to control the cooling fan of the air conditioner to operate at a set high wind level and controlling the compressor of the air conditioner to operate at a set frequency for a second set time. The specific functions and processes of the control unit 104 are also referred to in step S410.
The control unit 104 is further configured to continue to control the compressor of the air conditioner to operate at a reduced set frequency and control the cooling fan of the air conditioner to operate at a set low wind level if the current temperature of the heating device is reduced to be less than or equal to a fourth preset temperature value. The specific function and processing of the control unit 104 are also referred to in step S420.
Specifically, in the frequency-reducing mode, after the high windshield of the cooling fan works for a certain time, when the temperature T obtained by the controller is less than or equal to a fourth preset temperature value T4, the whole machine is controlled to work in the frequency-limiting mode, the cooling fan works in the low windshield, and meanwhile, the fourth preset temperature value T4 is less than the first preset temperature value T1. The limiting mode can ensure that the temperature in the air conditioner controller system does not exceed the temperature during starting temperature protection, and prevent the air conditioner controller system from not working normally when the air conditioner controller system is protected from starting temperature, so that the working efficiency of the variable frequency air conditioner is influenced.
In some embodiments, further comprising: and controlling a second continuous control process after the compressor of the air conditioner operates at the reduced set frequency, namely, continuously controlling the cooling fan of the air conditioner to operate according to the set high wind gear and controlling the compressor of the air conditioner to operate at the reduced set frequency under the condition that the current temperature is increased to be greater than or equal to a third preset temperature value, wherein the second continuous control process specifically comprises the following steps:
the control unit 104 is further configured to determine whether the current temperature of the heat generating device is still higher than a third preset temperature value and has been increased to be greater than or equal to a fifth preset temperature value if the current temperature of the heat generating device is not decreased to be less than or equal to a fourth preset temperature value. The specific functions and processes of the control unit 104 are also referred to in step S510.
The control unit 104 is further configured to control the air conditioner to stop if the current temperature of the heat generating device is still higher than a third preset temperature value and has risen to a value greater than or equal to a fifth preset temperature value. The specific functions and processes of the control unit 104 are also referred to in step S520.
Specifically, in the frequency reduction mode, when the temperature T obtained by the controller is greater than or equal to a fifth preset temperature value T5, and the third preset temperature value T3 is less than a fifth preset temperature value T5, the whole air conditioner is controlled to be shut down for protection in the frequency reduction mode, so that Power devices such as IPM (Intelligent Power Module), IGBT (Insulated Gate Bipolar Transistor), rectifier bridge, and fast recovery diode are prevented from being burned out due to excessive temperature, and the service life of the air conditioner is prevented from being affected.
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 5, 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 can realize that the air conditioner controller system can realize rapid cooling by changing the combination of the operation mode of the whole machine and the rotating speed of the cooling fan under different temperatures by detecting the temperature of the power device, the radiator, the PCB and the PFC inductor in the air conditioner controller system, thereby avoiding over-temperature damage.
According to an embodiment of the present invention, there is also provided an air conditioner corresponding to a temperature control apparatus of the air conditioner. The air conditioner may include: the temperature control device of the air conditioner is described above.
The air conditioner controller system is used as a core component of the air conditioner assembly system, and the working safety and reliability of the air conditioner controller system must be ensured, so that the safe, reliable and stable operation of the air conditioner system is ensured.
In order to ensure that the air conditioner controller system works normally, the temperatures of a power module, a radiator, a PCB (printed circuit board) and a heating device of the air conditioner controller system must be detected so as to be convenient for timely processing when the air conditioner controller system fails due to overhigh temperature, realize the temperature protection function of the air conditioner controller system and ensure the reliability and the safety of the air conditioner controller system.
In some embodiments, according to the scheme of the present invention, an overheat protection method for a Power device in an air conditioner controller system is provided, in which temperature detection is performed according to a Power module, a heat sink, a Printed Circuit Board (PCB) and a Power Factor Correction (PFC) inductor of the air conditioner controller system, so that the air conditioner controller system can perform graded cooling in different cooling modes at different temperatures, and a mode of changing a combination of a whole machine operation mode and a cooling fan rotation speed is adopted, so as to achieve a purpose of rapid cooling. Therefore, the power device is in a safe working temperature range, the problem of overheating and damage of the power device is effectively solved, and the reliable operation of the air conditioner is ensured.
Fig. 7 is a schematic structural diagram of an embodiment of a temperature protection circuit of an air conditioner controller system. As shown in fig. 7, the temperature protection circuit of the air conditioner controller system includes: the temperature control system comprises a temperature detection circuit, a power module PCB temperature sensor, a radiator temperature sensor, a power module temperature sensor, a PFC inductance temperature sensor and a control unit. A control unit, a Digital Signal Processor (DSP) or a Micro Controller Unit (MCU).
In the air conditioner controller system, a temperature sensor is arranged and used for collecting the temperature of the power module, the PFC inductor, the radiator and the PCB. And each path of temperature voltage signal acquired by the temperature sensor is input to the temperature detection circuit. The acquired temperature and voltage signals are subjected to error adjustment through an analog transmission compensation circuit or a voltage adjustment circuit, measurement errors caused by sensor leads are eliminated, and finally input voltage signals suitable for the I/O requirements of a DSP or an MCU are obtained through a filtering and amplifying circuit. And sending the temperature voltage signals of each path to a DSP/MCU of a main control chip for A/D conversion, and then processing and calculating the converted value to obtain each sampled temperature value T. The main chip performs D/a (digital-to-analog) conversion on the voltage signal.
In some embodiments, a method of cooling an air conditioner controller system includes:
after the air conditioner controller system starts to work for a period of time, the temperature of a radiating plate of a power module of the variable-frequency air conditioner controller, the temperature of a power module of the controller and the temperature of a PCB are collected through a temperature sensor. The acquired temperature voltage signal is input to a temperature detection circuit, a measurement error caused by a sensor lead is eliminated through an analog transmission compensation circuit or a voltage adjusting circuit, and finally an input voltage signal suitable for the requirements of an input/output port of a control chip is obtained through a filtering and amplifying circuit. And the temperature voltage signals are processed by the temperature detection circuit and then sent to a control chip DSP/MCU, A/D conversion is carried out in the control chip, and the conversion values are processed and calculated to obtain 4 temperature values T of the air conditioner power module radiating plate temperature, the PFC inductance temperature, the power module PCB temperature, the power module and the like.
And further, comparing the 4 paths of temperature values T with a preset temperature threshold value preset in a control chip program, and adjusting the working states of the air conditioner fan and the compressor of the unit as long as one path of temperature value exceeds the threshold value, thereby realizing the rapid cooling of the air conditioning system. The specific judgment process is as follows:
a first judgment process: and judging whether the temperature T obtained by the temperature sensor is greater than or equal to a first temperature preset value T1, increasing the wind speed of the cooling fan to work, judging whether the temperature T obtained by the temperature sensor meets the condition that T is less than a second temperature preset value T2, if so, reducing the wind speed of the cooling fan, and working in a low-windshield mode.
A second judgment process: and judging that the temperature T obtained by the temperature sensor is greater than or equal to a third temperature preset value T3, and increasing the wind speed of the cooling fan to cool the controller system in a frequency reduction mode by the air conditioner. And judging whether the temperature T obtained by the temperature sensor meets the condition that T is less than a fourth temperature preset value T4, if so, controlling the whole machine to work in a frequency limiting mode, and controlling the heat dissipation fan to work in a low windshield mode.
The third judgment process: and judging that the temperature T obtained by the temperature sensor is more than or equal to a fifth temperature preset value T5, and stopping the air conditioner for protection to prevent the power devices of the controller system from being burnt due to overhigh temperature.
FIG. 8 is a flowchart illustrating an embodiment of a cooling method for an air conditioner controller system. As shown in fig. 8, taking the inverter air conditioner as an example of the initial stage of the cooling mode when the inverter air conditioner is started up in a high temperature environment, the method for cooling the air conditioner controller system includes:
step 1, the air conditioner controller system obtains each sampled temperature value T (namely, the minimum value of each sampled temperature) and compares the temperature value T with a first preset temperature value T1:
if the obtained temperature T is less than a first preset temperature value T1, the air conditioner is always in a normal working state, and the cooling fan works on a low windshield.
When the obtained temperature T is larger than or equal to a first preset temperature value T1, the cooling fan increases the rotating speed to start working to cool the air conditioner controller system, and the air conditioner controller system can be cooled.
And 2, after the air conditioner works for a certain time, when the temperature T obtained by the air conditioner controller system is less than or equal to a second preset temperature value T2, the heat dissipation effect of the heat dissipation fan is obvious, the air conditioner controller system obtains good heat dissipation, at the moment, the heat dissipation fan works on a low windshield, and the second preset temperature value T2 is less than the first preset temperature value T1. The second preset temperature value T2 is limited to be less than the first preset temperature value T1, so as to prevent the service life of the cooling fan from being affected by frequent actions of the cooling fan when the obtained temperature T fluctuates between the first preset temperature value T1 and the lower part.
And 3, after the air conditioner works for a certain time, when the temperature T obtained by the air conditioner controller system is greater than or equal to a third preset temperature value T3, and the first preset temperature value T1 is greater than the third preset temperature value T3, the heat dissipation fan works in a high-windshield mode to cool the controller system, at the temperature, the situation that the work of the heat dissipation fan for increasing the wind speed cannot meet the current requirement of the controller system is shown, at the moment, the working frequency of the compressor obtained according to a conventional frequency calculation method is limited, and the working frequency after frequency limitation is used as the actual working frequency to control the compressor to run. The air speed of the heat dissipation fan is increased under the frequency reduction mode of the whole air conditioner to dissipate heat of the controller system, and the overall temperature of the air conditioner controller system can be effectively reduced.
And 4, in a frequency reduction mode, after the high windshield of the cooling fan works for a certain time, when the temperature T obtained by the controller is less than or equal to a fourth preset temperature value T4, controlling the whole machine to work in a frequency limiting mode, wherein the cooling fan works in the low windshield, and meanwhile, the fourth preset temperature value T4 is less than the first preset temperature value T1. The limiting mode can ensure that the temperature in the air conditioner controller system does not exceed the temperature during starting temperature protection, and prevent the air conditioner controller system from not working normally when the air conditioner controller system is protected from starting temperature, so that the working efficiency of the variable frequency air conditioner is influenced.
The frequency reduction is an operation mode that the working frequency of the air conditioning unit is gradually reduced. The frequency-limited mode air conditioning unit runs at a certain frequency temporarily.
And 5, in a frequency reduction mode, when the temperature T obtained by the controller is greater than or equal to a fifth preset temperature value T5, and the third preset temperature value T3 is less than a fifth preset temperature value T5, when the whole air conditioner is in the frequency reduction mode, the heat radiation fan can improve the wind speed and work, so that the current requirement of an air conditioner controller system can not be met, the air conditioner is controlled to be shut down for protection, and Power devices such as IPM (Intelligent Power Module), IGBT (Insulated Gate Bipolar Transistor), a rectifier bridge and a fast recovery diode are prevented from being burnt due to overhigh temperature, and the service life of the air conditioner is influenced.
Since the processing and functions of the air conditioner of this embodiment are basically corresponding to the embodiments, principles and examples of the apparatus shown in fig. 6, the description of this embodiment is not given in detail, and reference may be made to the related descriptions in the embodiments, which are not described herein again.
Through a large number of tests, the technical scheme of the invention is adopted, and the temperature of the power device, the radiator, the PCB and the PFC inductor in the air conditioner controller system is detected, so that the power device is in a safe working temperature range, the problem of overheating and damage of the power device is effectively solved, and the reliable operation of the air conditioner is ensured.
According to an embodiment of the present invention, there is also provided a storage medium corresponding to a temperature control method of an air conditioner, the storage medium including a stored program, wherein when the program is executed, a device in which the storage medium is located is controlled to execute the temperature control method of the air conditioner.
Since the processing and functions implemented by the storage medium of this embodiment substantially correspond to the embodiments, principles, and examples of the methods shown in fig. 1 to fig. 5, details are not described in the description of this embodiment, and reference may be made to the related descriptions in the foregoing embodiments, which are not described herein again.
Through a large number of tests, the technical scheme of the invention can realize that the air conditioner controller system can be cooled in different stages by adopting different cooling modes at different temperatures by detecting the temperature according to the power module, the radiator, the PCB and the PFC inductor of the air conditioner controller system, thereby realizing rapid cooling and avoiding over-temperature damage.
According to an embodiment of the present invention, there is also provided a processor corresponding to a temperature control method of an air conditioner, the processor being configured to execute a program, wherein the program executes the temperature control method of the air conditioner described above.
Since the processing and functions implemented by the processor of this embodiment substantially correspond to the embodiments, principles, and examples of the methods shown in fig. 1 to fig. 5, details are not described in the description of this embodiment, and reference may be made to the related descriptions in the foregoing embodiments, which are not described herein again.
Through a large number of tests, the technical scheme of the invention is adopted, the temperature of the power module radiating plate of the variable frequency air conditioner controller, the temperature of the power module of the controller and the temperature of the PCB are collected through the temperature sensor, and the working states of the air conditioner fan and the compressor of the unit are adjusted as long as one path of temperature value exceeds the threshold value, so that the air conditioner system is quickly cooled, and the over-temperature damage is avoided.
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 (13)
1. A temperature control method of an air conditioner is characterized by comprising the following steps:
acquiring the current temperature of a heating device in the air conditioner; the heat generating device includes: the power module, the radiator, the PCB and the inductor of the PFC circuit; the current temperature of the heating device is the minimum temperature of the temperatures of the heating device;
determining whether the current temperature of the heating device is greater than or equal to a first preset temperature value;
if the current temperature of the heating device is greater than or equal to the first preset temperature value, controlling a cooling fan of the air conditioner to operate according to a set high wind gear;
and if the current temperature of the heating device is lower than the first preset temperature value, controlling a cooling fan of the air conditioner to operate according to a set low wind gear.
2. The temperature control method of an air conditioner according to claim 1, further comprising:
after controlling a cooling fan of the air conditioner to operate for a first set time according to a set high wind level, determining whether the current temperature of the heating device is reduced to be less than or equal to a second preset temperature value;
and if the current temperature of the heating device is reduced to the second preset temperature value, controlling a cooling fan of the air conditioner to operate according to a preset low wind gear.
3. The temperature control method of an air conditioner according to claim 2, further comprising:
if the current temperature of the heating device is not reduced to the second preset temperature value, determining whether the current temperature of the heating device is increased to be greater than or equal to a third preset temperature value;
and if the current temperature of the heating device is increased to be greater than or equal to a third preset temperature value, continuously controlling a cooling fan of the air conditioner to operate according to a set high wind gear, and controlling a compressor of the air conditioner to reduce a set frequency to operate.
4. The temperature control method of an air conditioner according to claim 3, further comprising:
after continuing to control the cooling fan of the air conditioner to operate according to a set high wind level and controlling the compressor of the air conditioner to operate for a second set time by reducing a set frequency, determining whether the current temperature of the heating device is reduced to be less than or equal to a fourth preset temperature value;
and if the current temperature of the heating device is reduced to be less than or equal to a fourth preset temperature value, continuing to control a compressor of the air conditioner to reduce the set frequency to operate, and controlling a cooling fan of the air conditioner to operate according to a set low wind level.
5. The temperature control method of an air conditioner according to claim 4, further comprising:
if the current temperature of the heating device is not reduced to be less than or equal to a fourth preset temperature value, determining whether the current temperature of the heating device is still higher than the third preset temperature value and is increased to be greater than or equal to a fifth preset temperature value;
and if the current temperature of the heating device is still higher than a third preset temperature value and is increased to be greater than or equal to a fifth preset temperature value, controlling the air conditioner to stop.
6. A temperature control apparatus of an air conditioner, comprising:
an acquisition unit configured to acquire a current temperature of a heat generating device in the air conditioner; the heat generating device includes: the power module, the radiator, the PCB and the inductor of the PFC circuit; the current temperature of the heating device is the minimum temperature of the temperatures of the heating device;
a control unit configured to determine whether a current temperature of the heat generating device is greater than or equal to a first preset temperature value;
the control unit is also configured to control a cooling fan of the air conditioner to operate according to a set high wind gear if the current temperature of the heating device is greater than or equal to the first preset temperature value;
the control unit is further configured to control the cooling fan of the air conditioner to operate according to a set low wind gear if the current temperature of the heating device is smaller than the first preset temperature value.
7. The temperature control apparatus of an air conditioner according to claim 6, further comprising:
the control unit is further configured to determine whether the current temperature of the heating device is reduced to be less than or equal to a second preset temperature value after controlling a cooling fan of the air conditioner to operate for a first set time according to a set high wind gear;
the control unit is further configured to control the cooling fan of the air conditioner to operate according to a preset low wind level if the current temperature of the heating device is reduced to the second preset temperature value.
8. The temperature control apparatus of an air conditioner according to claim 7, further comprising:
the control unit is further configured to determine whether the current temperature of the heat generating device has increased to be greater than or equal to a third preset temperature value if the current temperature of the heat generating device has not decreased to the second preset temperature value;
the control unit is further configured to continue to control the cooling fan of the air conditioner to operate according to a set high wind gear and control the compressor of the air conditioner to operate at a set frequency if the current temperature of the heating device is increased to be greater than or equal to a third preset temperature value.
9. The temperature control apparatus of an air conditioner according to claim 8, further comprising:
the control unit is further configured to determine whether the current temperature of the heating device is reduced to be less than or equal to a fourth preset temperature value after continuing to control the cooling fan of the air conditioner to operate according to a set high wind level and controlling the compressor of the air conditioner to operate at a set frequency for a second set time;
the control unit is further configured to continue to control the compressor of the air conditioner to operate at a set frequency and control the cooling fan of the air conditioner to operate at a set low wind level if the current temperature of the heating device is reduced to be less than or equal to a fourth preset temperature value.
10. The temperature control apparatus of an air conditioner according to claim 9, further comprising:
the control unit is further configured to determine whether the current temperature of the heat generating device is still higher than a third preset temperature value and has been increased to be greater than or equal to a fifth preset temperature value if the current temperature of the heat generating device is not decreased to be less than or equal to a fourth preset temperature value;
the control unit is further configured to control the air conditioner to stop if the current temperature of the heat generating device is still higher than a third preset temperature value and is increased to be greater than or equal to a fifth preset temperature value.
11. An air conditioner, comprising: the temperature control device of an air conditioner according to any one of claims 6 to 10.
12. A storage medium characterized by comprising a stored program, wherein an apparatus in which the storage medium is located is controlled to perform the temperature control method of the air conditioner according to any one of claims 1 to 5 when the program is executed.
13. A processor for executing a program, wherein the program executes to execute the temperature control method of the air conditioner according to any one of claims 1 to 5.
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Application publication date: 20210316 |