CN110864426B - Frequency limiting control method and device, variable frequency air conditioner and controller thereof - Google Patents
Frequency limiting control method and device, variable frequency air conditioner and controller thereof Download PDFInfo
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- CN110864426B CN110864426B CN201810985535.7A CN201810985535A CN110864426B CN 110864426 B CN110864426 B CN 110864426B CN 201810985535 A CN201810985535 A CN 201810985535A CN 110864426 B CN110864426 B CN 110864426B
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0253—Compressor control by controlling speed with variable speed
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- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application discloses a frequency limiting control method and device, a variable frequency air conditioner and a controller thereof, wherein the method and the device are applied to the variable frequency air conditioner, and specifically calculate the current electromagnetic torque of a compressor of the variable frequency air conditioner; selecting a current torque limit value matched with the current temperature of an outdoor unit of the variable frequency air conditioner from a preset temperature-electromagnetic torque limit table; and controlling the working frequency of a compressor of the inverter air conditioner according to the current torque limit value, so that the time length of the current electromagnetic torque exceeding the current torque limit value is less than the preset time length, and the current electromagnetic torque is prevented from exceeding the current torque limit value for a long time. According to the scheme, the purpose of limiting control is to control the working frequency of the compressor to be reduced when the current electromagnetic torque is larger than the torque limit, and the effect of reducing the load of the variable frequency air conditioner is achieved by controlling the working frequency of the compressor, so that the stability of the compressor is prevented from being poor.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a frequency limiting control method and device, a variable frequency air conditioner and a controller thereof.
Background
In recent years, people are increasingly aware of energy conservation, and in the field of air conditioners, variable frequency air conditioners are more and more favored. Since the frequency of the compressor in the inverter air conditioner is variable, it is often desirable to operate the compressor at a high frequency in order to bring the temperature to the set temperature as quickly as possible. However, when the operating frequency is excessively high, the air conditioner is excessively loaded by the excessively high operating frequency, thereby causing deterioration in stability of the compressor.
Disclosure of Invention
In view of the above, the present application provides a frequency limitation control method and apparatus, an inverter air conditioner, and a controller thereof, which are used for limiting the operating frequency of a compressor of the inverter air conditioner so as to avoid the stability of the compressor from being deteriorated.
In order to achieve the above object, the following solutions are proposed:
a frequency limitation control method is applied to an inverter air conditioner and comprises the following steps:
calculating the current electromagnetic torque of a compressor of the variable-frequency air conditioner;
selecting a current torque limit value matched with the current temperature of an outdoor unit of the variable frequency air conditioner from a preset temperature-electromagnetic torque limit table;
and carrying out control limit control on the working frequency of a compressor of the inverter air conditioner according to the current torque limit value, so that the time length of the current electromagnetic torque exceeding the current torque limit value is less than the preset time length.
Optionally, the temperature-electromagnetic torque limit table includes a plurality of external temperature intervals, and further includes a plurality of torque limit values respectively corresponding to each of the external temperature intervals.
Optionally, the controlling the operating frequency of the compressor of the inverter air conditioner according to the current torque limit value includes:
when the current electromagnetic torque is greater than the current torque limit, controlling the operating frequency to decrease such that the current torque limit is below the current torque limit.
Optionally, the controlling the operating frequency of the compressor of the inverter air conditioner according to the current torque limit value further includes:
and when the reduced current torque limit value is reduced to be lower than the current torque limit value by a preset amplitude, forbidding the compressor to carry out frequency increasing operation and continuously presetting forbidding duration, and releasing the compressor for forbidding after the preset forbidding duration.
A frequency control limit control device is applied to a variable frequency air conditioner, and comprises:
the torque calculation module is used for calculating the current electromagnetic torque of a compressor of the inverter air conditioner;
the limit value searching module is used for selecting a current torque limit value matched with the current temperature of the outdoor unit of the variable-frequency air conditioner from a preset temperature-electromagnetic torque limit table;
and the frequency reduction control module is used for controlling and limiting the working frequency of a compressor of the variable frequency air conditioner according to the current torque limit value so as to prevent the current electromagnetic torque from exceeding the current torque limit value for a long time.
Optionally, the temperature-electromagnetic torque limit table includes a plurality of external temperature intervals, and further includes a plurality of torque limit values respectively corresponding to each of the external temperature intervals.
Optionally, the down-conversion control module includes:
a first control unit for controlling the operating frequency to decrease such that the current torque limit is below the current torque limit when the current electromagnetic torque is greater than the current torque limit.
Optionally, the down-conversion control module further includes:
and the second control unit is used for forbidding the compressor to carry out the frequency increasing operation and continuously presetting the forbidding duration after the reduced current torque limit value is reduced to be lower than the current torque limit value by a preset amplitude, and releasing the compressor for forbidding after the preset forbidding duration.
A controller is applied to an inverter air conditioner and is provided with the frequency control limit control device.
A controller applied to an inverter air conditioner comprises at least one processor and a memory connected with the processor, wherein the memory is used for storing computer programs or instructions, and the processor is used for executing the computer programs or instructions so as to enable the controller to realize the following operations on the inverter air conditioner:
calculating the current electromagnetic torque of a compressor of the variable-frequency air conditioner;
selecting a current torque limit value matched with the current temperature of an outdoor unit of the variable frequency air conditioner from a preset temperature-electromagnetic torque limit table;
and carrying out control limit control on the working frequency of a compressor of the inverter air conditioner according to the current torque limit value.
An inverter air conditioner is provided with the controller.
According to the technical scheme, the application discloses a frequency restriction control method and device, a variable frequency air conditioner and a controller thereof, and the method and the device are applied to the variable frequency air conditioner, in particular to calculating the current electromagnetic torque of a compressor of the variable frequency air conditioner; selecting a current torque limit value matched with the current temperature of an outdoor unit of the variable frequency air conditioner from a preset temperature-electromagnetic torque limit table; and controlling the working frequency of a compressor of the inverter air conditioner according to the current torque limit value so as to prevent the current electromagnetic torque from exceeding the current torque limit value for a long time. The scheme shows that the purpose of limiting control is to control the working frequency of the compressor to be reduced when the current electromagnetic torque is larger, and the effect of reducing the load of the variable-frequency air conditioner is achieved by controlling the working frequency of the compressor, so that the stability of the compressor is prevented from being poor.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating steps of a frequency limitation control method according to an embodiment of the present application;
fig. 2 is a block diagram of a frequency limit control apparatus according to an embodiment of the present disclosure;
fig. 3 is a block diagram of another frequency control limit control device according to an embodiment of the present application;
fig. 4 is a block diagram of a structure of another frequency control limit control device provided in the embodiment of the present application;
fig. 5 is a block diagram of a controller according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
Example one
Fig. 1 is a flowchart illustrating steps of a frequency limitation control method according to an embodiment of the present disclosure.
As shown in fig. 1, the frequency limitation control method provided in this embodiment is applied to an inverter air conditioner, and in particular, is applied to a controller of the inverter air conditioner, and is used for limiting and controlling an operating frequency of the inverter air conditioner, and the frequency limitation control method specifically includes the following steps:
and S1, calculating the current electromagnetic torque of the compressor of the inverter air conditioner.
During the operation of the inverter air conditioner, no matter during the heating operation or the cooling operation, by detecting relevant parameters of the compressor thereof and calculating the current electromagnetic torque T _ E of the compressor according to the relevant parameters, the calculation formula of the current electromagnetic torque is as follows:
T_E＝3/2*P*(Ke+(Ld-Lq)*Id)*Iq*β
where Ke is a compressor induction electric constant of the compressor, Ld is a d-axis inductance, Lq-axis is a q-axis inductance, Id and Iq are measured d-axis and q-axis currents, respectively, β is an efficiency factor, and P is a pole pair number of the compressor.
S2, the current torque limit value is selected according to the outside air temperature.
After the current electromagnetic torque is determined, the electromagnetic torque limit value corresponding to the current electromagnetic torque is searched from the preset corresponding relation between the current temperature and the electromagnetic torque limit value.
In specific implementation, for convenience, a temperature-electromagnetic torque limit table may be preset, where the temperature-electromagnetic torque limit table includes a plurality of external temperature regions, and a plurality of electromagnetic torque limits corresponding to each external temperature region one to one are set, and when the current temperature is in a certain external temperature region, the electromagnetic torque limit corresponding to the external temperature region is selected as the current torque limit.
And S3, controlling and controlling the working frequency of the compressor according to the current torque limit value.
After the current torque limit value is obtained, the compressor can be controlled according to the relation between the current electromagnetic torque and the electromagnetic torque limit value, specifically, the frequency of the compressor is controlled, so that the time length of the current electromagnetic torque exceeding the current torque limit value is shorter than the preset time length, namely, the current electromagnetic torque is reduced to be lower than the electromagnetic torque limit value, and the current electromagnetic torque is prevented from being too large for a long time.
It can be seen from the foregoing technical solutions that, the present embodiment provides a frequency limitation control method, which is applied to an inverter air conditioner, and specifically calculates a current electromagnetic torque of a compressor of the inverter air conditioner; selecting a current torque limit value matched with the current temperature of an outdoor unit of the variable frequency air conditioner from a preset temperature-electromagnetic torque limit table; and controlling the working frequency of a compressor of the inverter air conditioner according to the current torque limit value so as to prevent the current electromagnetic torque from exceeding the current torque limit value for a long time. The scheme shows that the purpose of limiting control is to control the working frequency of the compressor to be reduced when the current electromagnetic torque is larger, and the effect of reducing the load of the variable-frequency air conditioner is achieved by controlling the working frequency of the compressor, so that the stability of the compressor is prevented from being poor.
Specifically, the specific operation process of limiting and controlling the operating frequency of the compressor in this embodiment is described as follows:
and when the current electromagnetic torque exceeds the current torque limit value, controlling the compressor to work in a frequency reduction mode and continue for a certain time, namely reducing the working frequency of the compressor.
The duration may be determined according to actual tests, so that the current electromagnetic torque may be reduced to a preset magnitude below the current torque limit, and the preset magnitude may also be determined according to actual tests.
The above specific operation can meet the need of frequency reduction, and in addition, the following operation steps can be included:
when the working frequency of the compressor is reduced and the current electromagnetic torque is reduced to be lower than the current torque limit value by a preset amplitude, the frequency-up operation of the compressor is forbidden under any condition, and the forbidden operation lasts for a preset forbidden duration, so that the condition of the compressor is prevented from generating large fluctuation, and the protection control of the compressor is actually realized.
As can be seen from the above, the limit value of the outside air temperature range is limited not by the frequency limit but by the electromagnetic torque limit. In the running process of the air conditioner, factors influencing the load, such as indoor environment, indoor wind speed, outdoor wind speed and the like, finally cause the change of the electromagnetic torque, when the load is light, the compressor can be allowed to ascend and descend, and when the load is heavy, the frequency limit control of the compressor is carried out, so that in the same external air temperature zone, the compressor can be allowed to run at different frequency values under the condition that the electromagnetic torque is not exceeded. Therefore, the problem that the air conditioning performance cannot be exerted is avoided without simply setting a frequency limit value.
Example two
Fig. 2 is a block diagram of a frequency limit control device according to an embodiment of the present application.
As shown in fig. 2, the frequency control limit control device provided in this embodiment is applied to an inverter air conditioner, and in particular, is applied to a controller of an inverter air conditioner for controlling and limiting an operating frequency of the inverter air conditioner, and specifically includes a torque calculation module 10, a limit search module 20, and a frequency reduction control module 30.
The torque calculation module is used for calculating the current electromagnetic torque of a compressor of the inverter air conditioner.
During the operation of the inverter air conditioner, no matter during the heating operation or the cooling operation, by detecting relevant parameters of a compressor thereof and calculating the current electromagnetic torque T _ E of the compressor according to the relevant parameters, the technical formula of the current electromagnetic torque is as follows:
T_E＝3/2*P*(Ke+(Ld-Lq)*Id)*Iq*β
where Ke is a compressor induction electric constant of the compressor, Ld is a d-axis inductance, Lq-axis is a q-axis inductance, Id and Iq are measured d-axis and q-axis currents, respectively, β is an efficiency factor, and P is a pole pair number of the compressor.
And the limit value searching module is used for selecting the current torque limit value according to the external air temperature.
After the current electromagnetic torque is determined, the electromagnetic torque limit value corresponding to the current electromagnetic torque is searched from the preset corresponding relation between the current temperature and the electromagnetic torque limit value.
In specific implementation, for convenience, a temperature-electromagnetic torque limit table may be preset, where the temperature-electromagnetic torque limit table includes a plurality of external temperature regions, and a plurality of electromagnetic torque limits corresponding to each external temperature region one to one are set, and when the current temperature is in a certain external temperature region, the electromagnetic torque limit corresponding to the external temperature region is selected as the current torque limit.
And the frequency reduction control module is used for controlling and controlling the working frequency of the compressor according to the current torque limit value.
After the current torque limit value is obtained, the frequency of the compressor can be controlled according to the relation between the current electromagnetic torque and the electromagnetic torque limit value, so that the time length of the current electromagnetic torque exceeding the current torque limit value is shorter than the preset time length, namely, the current electromagnetic torque is reduced to be lower than the electromagnetic torque limit value, and the current electromagnetic torque is prevented from being too large for a long time.
As can be seen from the foregoing technical solutions, the present embodiment provides a frequency control limit control apparatus, which is applied to an inverter air conditioner, and specifically calculates a current electromagnetic torque of a compressor of the inverter air conditioner; selecting a current torque limit value matched with the current temperature of an outdoor unit of the variable frequency air conditioner from a preset temperature-electromagnetic torque limit table; and controlling the working frequency of a compressor of the inverter air conditioner according to the current torque limit value so as to prevent the current electromagnetic torque from exceeding the current torque limit value for a long time. The scheme shows that the purpose of limiting control is to control the working frequency of the compressor to be reduced when the current electromagnetic torque is larger, and the effect of reducing the load of the variable-frequency air conditioner is achieved by controlling the working frequency of the compressor, so that the stability of the compressor is prevented from being poor.
Specifically, the down-conversion control module for controlling the operating frequency of the compressor in this embodiment specifically includes a first control unit 31, as shown in fig. 3.
The first control unit is used for controlling the compressor to work in a frequency reduction mode and continue for a certain time after the current electromagnetic torque exceeds the current torque limit value, namely, the working frequency of the compressor is reduced.
The duration may be determined according to actual tests, so that the current electromagnetic torque may be reduced to a preset magnitude below the current torque limit, and the preset magnitude may also be determined according to actual tests.
In addition, the down-conversion control module may further include a second control unit 32, as shown in fig. 4.
The second control unit is used for forbidding the frequency raising operation of the compressor under any condition after reducing the working frequency of the compressor and reducing the current electromagnetic torque to be lower than the current torque limit value by a preset amplitude, and continuously presetting the forbidding duration, thereby avoiding the state of the compressor from generating larger fluctuation, which is actually a protection control of the compressor.
EXAMPLE III
The embodiment provides a controller, which is applied to an inverter air conditioner and is provided with a frequency control limit control device as provided in the above embodiment.
The frequency control limit control device is specifically used for calculating the current electromagnetic torque of a compressor of the inverter air conditioner; selecting a current torque limit value matched with the current temperature of an outdoor unit of the variable frequency air conditioner from a preset temperature-electromagnetic torque limit table; and controlling the working frequency of a compressor of the inverter air conditioner according to the current torque limit value, so that the time length of the current electromagnetic torque exceeding the current torque limit value is less than the preset time length, namely, the current electromagnetic torque is prevented from exceeding the current torque limit value for a long time. The scheme shows that the purpose of limiting control is to control the working frequency of the compressor to be reduced when the current electromagnetic torque is larger, and the effect of reducing the load of the variable-frequency air conditioner is achieved by controlling the working frequency of the compressor, so that the stability of the compressor is prevented from being poor.
Example four
Fig. 5 is a block diagram of a controller according to an embodiment of the present disclosure.
As shown in fig. 5, the controller 100 provided in this embodiment is applied to an inverter air conditioner, and specifically includes at least one processor 101 and a memory 102, which are connected by a data bus 103. The memory is used for storing corresponding computer programs or instructions, the processor is used for obtaining the corresponding computer programs or instructions through the data bus and executing the corresponding computer programs or instructions, and the controller can be caused to execute the following operations on the variable frequency air conditioner by executing the computer programs or instructions:
calculating the current electromagnetic torque of a compressor of the variable frequency air conditioner;
selecting a current torque limit value matched with the current temperature of an outdoor unit of the variable frequency air conditioner from a preset temperature-electromagnetic torque limit table;
and controlling the working frequency of a compressor of the inverter air conditioner according to the current torque limit value, so that the time length of the current electromagnetic torque exceeding the current torque limit value is less than the preset time length, namely, the current electromagnetic torque is prevented from exceeding the current torque limit value for a long time.
The purpose of the limiting control is to control the working frequency of the compressor to be reduced when the current electromagnetic torque is larger, and the effect of reducing the load of the inverter air conditioner is achieved by controlling the working frequency of the compressor, so that the stability of the compressor is prevented from being deteriorated.
EXAMPLE five
The embodiment provides an inverter air conditioner which is provided with the controller provided by any one of the above embodiments.
The controller is provided with a frequency control limit control device, and is specifically used for calculating the current electromagnetic torque of a compressor of the inverter air conditioner; selecting a current torque limit value matched with the current temperature of an outdoor unit of the variable frequency air conditioner from a preset temperature-electromagnetic torque limit table; and controlling the working frequency of a compressor of the inverter air conditioner according to the current torque limit value, so that the time length of the current electromagnetic torque exceeding the current torque limit value is less than the preset time length, namely the current electromagnetic torque is prevented from exceeding the current torque limit value for a long time. The scheme shows that the purpose of limiting control is to control the working frequency of the compressor to be reduced when the current electromagnetic torque is larger, and the effect of reducing the load of the variable-frequency air conditioner is achieved by controlling the working frequency of the compressor, so that the stability of the compressor is prevented from being poor.
Alternatively, the controller may comprise at least one processor and a memory, both connected by a data bus. The memory is used for storing corresponding computer programs or instructions, the processor is used for obtaining the corresponding computer programs or instructions through the data bus and executing the corresponding computer programs or instructions, and the controller can be caused to execute the following operations on the variable frequency air conditioner by executing the computer programs or instructions:
calculating the current electromagnetic torque of a compressor of the variable frequency air conditioner;
selecting a current torque limit value matched with the current temperature of an outdoor unit of the variable frequency air conditioner from a preset temperature-electromagnetic torque limit table;
and controlling the working frequency of a compressor of the inverter air conditioner according to the current torque limit value so as to prevent the current electromagnetic torque from exceeding the current torque limit value for a long time.
The purpose of the limiting control is to control the working frequency of the compressor to be reduced when the current electromagnetic torque is larger, and the effect of reducing the load of the inverter air conditioner is achieved by controlling the working frequency of the compressor, so that the stability of the compressor is prevented from being deteriorated.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one of skill in the art, embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The technical solutions provided by the present application are introduced in detail, and specific examples are applied in the description to explain the principles and embodiments of the present application, and the descriptions of the above examples are only used to help understanding the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (11)
1. A frequency limit control method is applied to a variable frequency air conditioner and is characterized by comprising the following steps:
calculating the current electromagnetic torque of a compressor of the variable-frequency air conditioner;
selecting a current torque limit value matched with the current temperature of an outdoor unit of the variable frequency air conditioner from a preset temperature-electromagnetic torque limit table;
and carrying out control limit control on the working frequency of a compressor of the inverter air conditioner according to the current torque limit value, so that the time length of the current electromagnetic torque exceeding the current torque limit value is less than the preset time length.
2. The frequency-limiting control method of claim 1, wherein the temperature-electromagnetic torque limit table includes a plurality of outer temperature intervals, and further includes a plurality of torque limit values respectively corresponding to each of the outer temperature intervals.
3. The frequency restriction control method according to claim 1, wherein the restriction controlling the operating frequency of the compressor of the inverter air conditioner according to the current torque limit value comprises the steps of:
when the current electromagnetic torque is greater than the current torque limit, controlling the operating frequency to decrease such that the current torque limit is below the current torque limit.
4. The frequency restriction control method according to claim 3, wherein the operation frequency of the compressor of the inverter air conditioner is restricted according to the current torque limit value, further comprising the steps of:
and when the reduced current torque limit value is reduced to be lower than the current torque limit value by a preset amplitude, forbidding the compressor to carry out frequency increasing operation and continuously presetting forbidding duration, and releasing the compressor for forbidding after the preset forbidding duration.
5. A frequency control limit control device is applied to a variable frequency air conditioner, and is characterized by comprising:
the torque calculation module is used for calculating the current electromagnetic torque of a compressor of the inverter air conditioner;
the limit value searching module is used for selecting a current torque limit value matched with the current temperature of the outdoor unit of the variable-frequency air conditioner from a preset temperature-electromagnetic torque limit table;
and the frequency reduction control module is used for controlling and limiting the working frequency of a compressor of the variable frequency air conditioner according to the current torque limit value.
6. The frequency limiting control apparatus of claim 5 wherein said temperature-to-electromagnetic torque limit table includes a plurality of outer temperature intervals and further includes a plurality of torque limit values respectively corresponding to each of said outer temperature intervals.
7. The frequency limiting control device of claim 5, wherein the down control module comprises:
a first control unit for controlling the operating frequency to decrease such that the current torque limit is below the current torque limit when the current electromagnetic torque is greater than the current torque limit.
8. The frequency limiting control device of claim 7, wherein the down control module further comprises:
and the second control unit is used for forbidding the compressor to carry out the frequency increasing operation and continuously presetting the forbidding duration after the reduced current torque limit value is reduced to be lower than the current torque limit value by a preset amplitude, and releasing the compressor for forbidding after the preset forbidding duration.
9. A controller applied to an inverter air conditioner is characterized in that the frequency control limit control device is provided according to any one of claims 5 to 8.
10. A controller applied to an inverter air conditioner is characterized by comprising at least one processor and a memory connected with the processor, wherein the memory is used for storing computer programs or instructions, and the processor is used for executing the computer programs or instructions so as to enable the controller to realize the following operations on the inverter air conditioner:
calculating the current electromagnetic torque of a compressor of the variable-frequency air conditioner;
selecting a current torque limit value matched with the current temperature of an outdoor unit of the variable frequency air conditioner from a preset temperature-electromagnetic torque limit table;
and carrying out control limit control on the working frequency of a compressor of the inverter air conditioner according to the current torque limit value so as to prevent the current electromagnetic torque from exceeding the current torque limit value for a long time.
11. An inverter air conditioner, characterized in that, a controller as claimed in any one of claims 9 to 10 is provided.
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| JP2004245215A (en) * | 2003-01-21 | 2004-09-02 | Sanyo Electric Co Ltd | Device for controlling torque and method for controlling the torque |
| CN101109553A (en) * | 2006-07-19 | 2008-01-23 | 乐金电子(天津)电器有限公司 | Method for limiting inverter compressor maximum frequency according to outdoor environment temperature |
| CN101666530B (en) * | 2008-09-04 | 2012-09-05 | 海尔集团公司 | Method for controlling supply frequency of variable frequency compressor |
| CN106208887B (en) * | 2016-07-13 | 2018-10-26 | 广东美的制冷设备有限公司 | No electrolytic capacitor motor driven systems and its control method, device |
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