CN114704934B - Method and device for controlling direct current air conditioner and direct current air conditioner - Google Patents
Method and device for controlling direct current air conditioner and direct current air conditioner Download PDFInfo
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- CN114704934B CN114704934B CN202210152770.2A CN202210152770A CN114704934B CN 114704934 B CN114704934 B CN 114704934B CN 202210152770 A CN202210152770 A CN 202210152770A CN 114704934 B CN114704934 B CN 114704934B
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- 238000000034 method Methods 0.000 title claims abstract description 59
- 230000003313 weakening effect Effects 0.000 claims abstract description 64
- 238000004146 energy storage Methods 0.000 claims abstract description 51
- 230000004907 flux Effects 0.000 claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 230000006870 function Effects 0.000 claims description 98
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000010248 power generation Methods 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 description 55
- 238000010438 heat treatment Methods 0.000 description 15
- 238000003860 storage Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 230000000875 corresponding effect Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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Classifications
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Air Conditioning Control Device (AREA)
Abstract
The application relates to the technical field of intelligent household appliances, and discloses a method for controlling a direct current air conditioner, which comprises the following steps: determining whether an up-conversion limiting condition is met according to the command voltage and the bus voltage of the compressor motor; under the condition that the frequency-raising limiting condition is met, the start and stop of the weak magnetic function are controlled according to the residual electric quantity value of the photovoltaic energy storage system, so that the utilization rate of electric energy in the photovoltaic energy storage system is improved. The current temperature regulation specific condition is judged according to the residual electric quantity value of the photovoltaic energy storage system before the weak magnetic function is entered, and the weak magnetic function is specifically controlled to be started and stopped according to the actual condition of each user. The method adapts to the trend of direct current power generation, improves the accuracy of the start-stop flux weakening function of the direct current air conditioner, and fully utilizes the electric energy stored in the photovoltaic energy storage system. The application also discloses a device for controlling the direct current air conditioner and the direct current air conditioner.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, and for example relates to a method and a device for controlling a direct current air conditioner and the direct current air conditioner.
Background
At present, along with the implementation of 'carbon reaching peak', 'carbon neutralization', new energy development steps into a rapid development period, the green development of energy and the DC development of a power grid, the development of household electricity DC technology is accelerated, and the DC household appliances become a development trend increasingly. However, due to the instability generated by the green power supply, how to adapt to the green power supply with the direct current characteristic and the distributed direct current power grid becomes a problem to be solved.
The prior art discloses that in order to guarantee the effect of refrigeration or heating under the condition that the bus voltage reaches the limit of ascending frequency, the air conditioner will enter the field weakening control to continue to raise the operating frequency of the compressor.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
due to the instability of the green power supply, the condition that the household voltage is lower than the typical value 375V exists, the bus voltage is extremely unstable, the direct current air conditioner frequently reaches the frequency-up limit, so that the condition of weak magnetic control is entered, the accuracy of the starting and stopping weak magnetic function of the direct current air conditioner is poor, and the electric energy stored in the photovoltaic energy storage system cannot be well utilized.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a method and a device for controlling a direct current air conditioner, and the direct current air conditioner, so as to adapt to the trend of direct current power generation, improve the accuracy of the start-stop flux weakening function of the direct current air conditioner, and fully utilize the electric energy stored in a photovoltaic energy storage system.
In some embodiments, the above method comprises: determining whether an up-conversion limiting condition is met according to the command voltage and the bus voltage of the compressor motor; under the condition that the frequency-raising limiting condition is met, the start and stop of the weak magnetic function are controlled according to the residual electric quantity value of the photovoltaic energy storage system, so that the utilization rate of electric energy in the photovoltaic energy storage system is improved.
In some embodiments, the apparatus comprises: the system comprises a processor and a memory storing program instructions, wherein the processor is configured to execute the method for controlling the direct current air conditioner when the program instructions are executed.
In some embodiments, the dc air conditioner includes: the device for controlling the direct current air conditioner.
The method and the device for controlling the direct current air conditioner and the direct current air conditioner provided by the embodiment of the disclosure can realize the following technical effects:
and determining whether the frequency-increasing limiting condition is met according to the command voltage of the compressor motor and the bus voltage, and controlling the start and stop of the flux weakening function according to the residual electric quantity value of the photovoltaic energy storage system under the condition that the frequency-increasing limiting condition is met so as to improve the utilization rate of electric energy in the photovoltaic energy storage system. The current temperature regulation specific condition is judged according to the residual electric quantity value of the photovoltaic energy storage system before the weak magnetic function is entered, and the weak magnetic function is specifically controlled to be started and stopped according to the actual condition of each user. The method adapts to the trend of direct current power generation, improves the accuracy of the start-stop flux weakening function of the direct current air conditioner, and fully utilizes the electric energy stored in the photovoltaic energy storage system.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
FIG. 1 is a schematic diagram of a method for controlling a DC air conditioner according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of another method for controlling a DC air conditioner provided by an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another method for controlling a DC air conditioner provided by an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another method for controlling a DC air conditioner provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another method for controlling a DC air conditioner provided by an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of another method for controlling a DC air conditioner provided by an embodiment of the present disclosure;
fig. 7 is a schematic view of an apparatus for controlling a dc air conditioner according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
In the embodiment of the disclosure, the intelligent home appliance refers to a home appliance formed after a microprocessor, a sensor technology and a network communication technology are introduced into the home appliance, and has the characteristics of intelligent control, intelligent sensing and intelligent application, the operation process of the intelligent home appliance often depends on the application and processing of modern technologies such as the internet of things, the internet and an electronic chip, for example, the intelligent home appliance can realize remote control and management of a user on the intelligent home appliance by connecting the electronic appliance.
In the disclosed embodiment, the terminal device refers to an electronic device with a wireless connection function, and the terminal device can be in communication connection with the intelligent household electrical appliance through connecting with the internet, or can be in communication connection with the intelligent household electrical appliance through Bluetooth, wifi and other modes. In some embodiments, the terminal device is, for example, a mobile device, a computer, or an in-vehicle device built into a hover vehicle, etc., or any combination thereof. The mobile device may include, for example, a cell phone, smart home device, wearable device, smart mobile device, virtual reality device, etc., or any combination thereof, wherein the wearable device includes, for example: smart watches, smart bracelets, pedometers, etc.
In the existing control technology of the permanent magnet synchronous compressor of the variable frequency air conditioner, the command voltage of the motor is positively correlated with the absolute value of the direct axis voltage and the absolute value of the quadrature axis voltage respectively, but the command voltage cannot be always increased due to the limitation of hardware. When the bus voltage satisfies the frequency-increasing limit condition, if the direct-axis current can be increased in the negative direction in order to continue to expand the operation speed of the motor, the operation speed of the motor can be further increased, thereby expanding the operation speed of the motor. Because the current can generate a magnetic field, the direct-axis current of the negative phase is introduced to generate the magnetic field of the negative phase, which is equivalent to the effect of reducing the counter electromotive force constant of the press, namely weakening the magnetic field, the technology is called field weakening control in the industry.
As shown in fig. 1, an embodiment of the present disclosure provides a method for controlling a dc air conditioner, including:
s01, determining whether the frequency-raising limiting condition is met or not according to the command voltage and the bus voltage of the compressor motor by the direct current air conditioner.
S02, under the condition that the direct current air conditioner meets the frequency-increasing limiting condition, the direct current air conditioner controls the start and stop of the field weakening function according to the residual electric quantity value of the photovoltaic energy storage system so as to improve the utilization rate of electric energy in the photovoltaic energy storage system.
By adopting the method for controlling the direct current air conditioner, whether the frequency-increasing limiting condition is met or not can be determined according to the command voltage and the bus voltage of the compressor motor, and the start and stop of the field weakening function are controlled according to the residual electric quantity value of the photovoltaic energy storage system under the condition that the frequency-increasing limiting condition is met so as to improve the utilization rate of electric energy in the photovoltaic energy storage system. The current temperature regulation specific condition is judged according to the residual electric quantity value of the photovoltaic energy storage system before the weak magnetic function is entered, and the weak magnetic function is specifically controlled to be started and stopped according to the actual condition of each user. The method adapts to the trend of direct current power generation, improves the accuracy of the start-stop flux weakening function of the direct current air conditioner, and fully utilizes the electric energy stored in the photovoltaic energy storage system.
Optionally, the determining whether the frequency-increasing limiting condition is met by the direct current air conditioner according to the command voltage and the bus voltage of the compressor motor includes: the direct current air conditioner calculates the voltage ratio of the effective value of the command voltage of the compressor motor to the bus voltage; and determining whether the direct current air conditioner meets the frequency-up limiting condition according to the voltage ratio.
Therefore, the accuracy of the start-stop flux weakening control of the direct-current air conditioner can be better improved. The voltage ratio of the command voltage to the bus voltage of the motor can represent the extent of the current command voltage from the hardware limit. Therefore, whether the compressor can continue to raise the frequency can be judged through the voltage ratio, and corresponding operation is executed according to the judging result, so that the accuracy of entering the field weakening control is improved.
Optionally, the determining whether the frequency-up limiting condition is met by the direct current air conditioner according to the voltage ratio includes: under the condition that the voltage ratio is greater than or equal to the ratio threshold, the direct current air conditioner determines that the frequency-increasing limiting condition is met; and under the condition that the voltage ratio is smaller than the ratio threshold, the direct current air conditioner determines that the frequency-up limiting condition is not met.
Thus, the time for starting and stopping the flux weakening control can be better determined. And under the condition that the voltage ratio is larger than or equal to the ratio threshold value, the air conditioner shows that the effective value of the command voltage is far larger than the bus voltage at the moment, the frequency rising of the compressor has almost no margin, and the frequency rising limiting condition is determined to be met. And under the condition that the voltage ratio is smaller than the ratio threshold value, the effective value of the command voltage is far smaller than the bus voltage, and the compressor has a margin in frequency rising, so that the frequency rising limiting condition is determined not to be met.
As shown in connection with fig. 2, an embodiment of the present disclosure provides another method for controlling a dc air conditioner, including:
s01, determining whether the frequency-raising limiting condition is met or not according to the command voltage and the bus voltage of the compressor motor by the direct current air conditioner.
S021, under the condition that the residual electric quantity value is larger than the electric quantity threshold value, the direct current air conditioner controls the flux weakening function to be started so as to improve the running frequency of the compressor.
S022, when the residual electric quantity value is smaller than or equal to the electric quantity threshold value, the direct current air conditioner controls the start and stop of the weak magnetic function according to the related parameter information.
By adopting the method for controlling the direct current air conditioner provided by the embodiment of the disclosure, whether the limitation condition of frequency up is met can be judged through the residual electric quantity value of the energy storage system. And under the condition that the residual electric quantity value is smaller than or equal to the electric quantity threshold value, judging that the compressor is operated at the highest operating frequency and still cannot meet the temperature regulation requirement of the direct current air conditioner. And the direct current air conditioner controls the start and stop of the flux weakening function according to the related parameter information so that the running frequency of the compressor meets the temperature regulation requirement of the direct current air conditioner.
As shown in connection with fig. 3, an embodiment of the present disclosure provides another method for controlling a dc air conditioner, including:
s01, determining whether the frequency-raising limiting condition is met or not according to the command voltage and the bus voltage of the compressor motor by the direct current air conditioner.
S021, under the condition that the residual electric quantity value is larger than the electric quantity threshold value, the direct current air conditioner controls the flux weakening function to be started so as to improve the running frequency of the compressor.
S031, under the condition that the residual electric quantity value is smaller than or equal to the electric quantity threshold value, the direct current air conditioner determines the target operating frequency of the compressor according to the outdoor environment temperature and the time parameter information.
S032, the direct current air conditioner controls the start and stop of the flux weakening function according to the target operating frequency and the temperature value set by the user.
By adopting the method for controlling the direct current air conditioner, provided by the embodiment of the disclosure, the target operating frequency of the compressor can be determined according to the outdoor environment temperature and the time parameter information under the condition that the compressor is operated at the highest operating frequency and the temperature regulation requirement of the direct current air conditioner can not be met. Thus, the start and stop of the weak magnetic function are determined according to the target operating frequency. For example, when the residual electric quantity of the photovoltaic energy storage system is greater than 60%, the weak magnetic function is started, so that the frequency of the compressor is continuously increased, and the refrigerating and heating quantities required by users are met. And under the condition that the residual electric quantity of the photovoltaic energy storage system is less than or equal to 60% and more than 30%, acquiring the outdoor environment temperature. And when the outdoor environment temperature is higher than 27 ℃, the air conditioner is considered to operate in a refrigerating mode, and when the outdoor environment temperature is lower than 18 ℃, the air conditioner is considered to operate in a heating mode. At this time, the current time is acquired. And judging the time of the energy storage system for supplying power to the direct current air conditioner at night according to the current time, thereby determining the running frequency of the compressor, and judging whether the weak magnetic function needs to be started or not by combining the temperature value set by a user.
Optionally, the direct current air conditioner controls start and stop of the flux weakening function according to the target operating frequency and the user set temperature value, and the method comprises the following steps: the direct current air conditioner determines a temperature difference value between the current indoor temperature and the user set temperature; under the condition that the temperature difference is greater than or equal to the temperature difference threshold value, the direct current air conditioner starts the weak magnetic function so as to improve the running frequency of the compressor.
Thus, the start/stop time of the field weakening control can be better judged. The outdoor environment temperature is obtained under the condition that the residual electric quantity of the photovoltaic energy storage system is less than or equal to 60% and more than 30%. When the ambient temperature is higher than 27 ℃ and the current time is higher than 2 hours in the early morning, the time for the energy storage system to supply power to the direct-current air conditioner is considered longer at night, and the start and stop of the weak magnetic state are controlled according to the temperature difference value between the indoor ambient temperature and the temperature set by a user. For example, when the temperature difference value is larger than 6 ℃, the power grid is connected to supply power to the air conditioner to control the opening of the weak magnetic function, so that the frequency of the compressor is continuously increased to meet the refrigerating capacity required by a user. And under the condition that the temperature difference value is more than 3 ℃ and less than or equal to 6 ℃, controlling the direct current air conditioner to operate at the highest frequency without starting the weak magnetic function. And under the condition that the temperature difference value is less than or equal to 3 ℃, controlling the direct current air conditioner not to start the field weakening control, and controlling the frequency down-conversion operation of the press. I.e. the compressor is run at a reduced frequency AHz based on the highest frequency without turning on the flux weakening function or at a reduced B% based on the highest frequency without turning on the flux weakening function. When the ambient temperature is higher than 27 ℃ and the current time is later than 2 am, the time for supplying power to the direct-current air conditioner by the energy storage system at night is considered to be short, and the current residual electric quantity is sufficient. The air conditioner is controlled to start the field weakening function, so that the frequency of the press is continuously increased, and the refrigerating capacity required by a user is met. When the ambient temperature is less than 18 ℃ and the current time is earlier than 4 hours in the morning, the air conditioner is considered to operate in a heating mode, the energy storage system is required to supply power to the direct-current air conditioner at night for a long time, and at the moment, the start and stop of the weak magnetic state are controlled according to the temperature difference value between the indoor ambient temperature and the temperature set by a user. For example, when the temperature difference value is larger than 6 ℃, the power grid is connected to supply power to the air conditioner to control the opening of the weak magnetic function, so that the frequency of the compressor is continuously increased to meet the heating quantity required by a user. And under the condition that the temperature difference value is more than 3 ℃ and less than or equal to 6 ℃, controlling the direct current air conditioner to operate at the highest frequency without starting the weak magnetic function. And under the condition that the temperature difference value is less than or equal to 3 ℃, controlling the direct current air conditioner not to start the field weakening control, and controlling the frequency down-conversion operation of the press. I.e., the compressor is operated at a reduced frequency CHz based on the highest frequency that does not turn on the flux weakening function or at a reduced D% based on the highest frequency that does not turn on the flux weakening function. When the ambient temperature is less than 18 ℃ and the current time is later than 4 am, the time for supplying power to the direct-current air conditioner by the energy storage system at night is considered to be short, and the current residual electric quantity is sufficient. The air conditioner is controlled to start the flux weakening function, so that the frequency of the press is continuously increased, and the heating quantity required by a user is met.
And under the condition that the residual electric quantity of the photovoltaic energy storage system is less than or equal to 30%, acquiring the outdoor environment temperature. When the ambient temperature is higher than 27 ℃ and the current time is higher than 4 hours in the morning, the energy storage system is required to supply power to the direct current air conditioner at night under the condition of low electric quantity, and the start and stop of the weak magnetic state are controlled according to the temperature difference value between the indoor ambient temperature and the temperature set by a user. For example, when the temperature difference value is larger than 3 ℃, the power grid is connected to supply power to the air conditioner to control the opening of the weak magnetic function, so that the frequency of the compressor is continuously increased to meet the refrigerating capacity required by a user. And under the condition that the temperature difference value is less than or equal to 3 ℃, controlling the direct current air conditioner not to start the field weakening control, and controlling the frequency down-conversion operation of the press. I.e. the compressor is run at a reduced frequency AHz based on the highest frequency without turning on the flux weakening function or at a reduced B% based on the highest frequency without turning on the flux weakening function. When the ambient temperature is higher than 27 ℃ and the current time is later than 4 hours in the morning, the time for the energy storage system to supply power to the direct-current air conditioner is considered to be shorter at night, and the start and stop of the weak magnetic state are controlled according to the temperature difference value between the indoor ambient temperature and the user set temperature at the moment due to insufficient electric quantity. For example, in the case that the temperature difference value is greater than 3 ℃, the direct current air conditioner is controlled to operate at the highest frequency without turning on the flux weakening function. And under the condition that the temperature difference value is less than or equal to 3 ℃, controlling the direct current air conditioner not to start the field weakening control, and controlling the frequency down-conversion operation of the press. I.e. the compressor is run at a reduced frequency AHz based on the highest frequency without turning on the flux weakening function or at a reduced B% based on the highest frequency without turning on the flux weakening function. When the ambient temperature is less than 18 ℃ and the current time is earlier than 6 am, the energy storage system is required to supply power to the direct current air conditioner at night for a long time under the condition of low electric quantity, and the start and stop of the weak magnetic state are controlled according to the temperature difference value between the indoor ambient temperature and the temperature set by a user. For example, when the temperature difference value is larger than 3 ℃, the power grid is connected to supply power to the air conditioner to control the opening of the weak magnetic function, so that the frequency of the compressor is continuously increased to meet the heating quantity required by a user. And under the condition that the temperature difference value is less than or equal to 3 ℃, controlling the direct current air conditioner not to start the field weakening control, and controlling the frequency down-conversion operation of the press. I.e., the compressor is operated at a reduced frequency CHz based on the highest frequency that does not turn on the flux weakening function or at a reduced D% based on the highest frequency that does not turn on the flux weakening function. When the ambient temperature is less than 18 ℃ and the current time is later than 6 hours in the morning, the time for the energy storage system to supply power to the direct-current air conditioner is considered to be short at night, and the start and stop of the weak magnetic state are controlled according to the temperature difference value between the indoor ambient temperature and the user set temperature at the moment due to insufficient electric quantity. For example, in the case that the temperature difference value is greater than 3 ℃, the direct current air conditioner is controlled to operate at the highest frequency without turning on the flux weakening function. And under the condition that the temperature difference value is less than or equal to 3 ℃, controlling the direct current air conditioner not to start the field weakening control, and controlling the frequency down-conversion operation of the press. I.e., the compressor is operated at a reduced frequency CHz based on the highest frequency that does not turn on the flux weakening function or at a reduced D% based on the highest frequency that does not turn on the flux weakening function.
As shown in connection with fig. 4, an embodiment of the present disclosure provides another method for controlling a dc air conditioner, including:
s01, determining whether the frequency-raising limiting condition is met or not according to the command voltage and the bus voltage of the compressor motor by the direct current air conditioner.
S021, under the condition that the residual electric quantity value is larger than the electric quantity threshold value, the direct current air conditioner controls the flux weakening function to be started so as to improve the running frequency of the compressor.
S041, under the condition that the residual electric quantity value is smaller than or equal to the electric quantity threshold value, the direct current air conditioner determines the target operating frequency of the compressor according to the outdoor environment temperature and the indoor personnel parameter information.
S042, the direct current air conditioner controls the start and stop of the flux weakening function according to the target operating frequency and the temperature value set by the user.
By adopting the method for controlling the direct current air conditioner, provided by the embodiment of the disclosure, the target operating frequency of the compressor can be determined according to the outdoor environment temperature and the indoor personnel parameter information under the condition that the compressor is operated at the highest operating frequency and the temperature regulating requirement of the direct current air conditioner can not be met. Thus, the start and stop of the weak magnetic function are determined according to the target operating frequency. For example, when the residual electric quantity of the photovoltaic energy storage system is greater than 60%, the weak magnetic function is started, so that the frequency of the compressor is continuously increased, and the refrigerating and heating quantities required by users are met. And under the condition that the residual electric quantity of the photovoltaic energy storage system is less than or equal to 60% and more than 30%, acquiring the outdoor environment temperature. And when the outdoor environment temperature is higher than 27 ℃, the air conditioner is considered to operate in a refrigerating mode, and when the outdoor environment temperature is lower than 18 ℃, the air conditioner is considered to operate in a heating mode. At this time, whether a person is present in the current room is acquired. And judging the time period for which the energy storage system is required to supply power to the direct-current air conditioner at night according to the judgment result of the existence of personnel, thereby determining the running frequency of the compressor, and judging whether the weak magnetic function is required to be started or not by combining the temperature value set by a user.
Optionally, the direct current air conditioner controls start and stop of the flux weakening function according to the target operating frequency and the user set temperature value, and the method comprises the following steps: the direct current air conditioner determines a temperature difference value between the current indoor temperature and the user set temperature; under the condition that the temperature difference is greater than or equal to the temperature difference threshold value, the direct current air conditioner starts the weak magnetic function so as to improve the running frequency of the compressor.
Thus, the start/stop time of the field weakening control can be better judged. Specifically, under the condition that the residual electric quantity of the photovoltaic energy storage system is more than 60%, if someone exists indoors, the photovoltaic energy storage system is controlled to enter the field weakening function, so that the operation frequency of the compressor is continuously increased to meet the refrigerating and heating quantity required by a user. If no one is in the room, the direct current air conditioner is controlled to operate at the highest frequency without starting the weak magnetic function.
And under the condition that the residual electric quantity of the photovoltaic energy storage system is less than or equal to 60% and more than 30%, acquiring the outdoor environment temperature. And calculating the temperature difference value between the indoor environment temperature and the user set temperature under the condition that the environment temperature is higher than 27 ℃ and people exist indoors. And under the condition that the temperature difference value is greater than or equal to 3 ℃, the weak magnetic function is started, so that the frequency of the press is continuously increased to meet the refrigerating capacity required by a user. And under the condition that the temperature difference value is less than 3 ℃, controlling the direct current air conditioner to operate at the highest frequency without starting the weak magnetic function. And under the condition that the ambient temperature is greater than 27 ℃ and no one exists indoors, calculating the temperature difference value between the indoor ambient temperature and the user-set temperature. And under the condition that the temperature difference value is greater than or equal to 3 ℃, controlling the direct current air conditioner to operate at the highest frequency without starting the weak magnetic function. And under the condition that the temperature difference value is less than 3 ℃, controlling the direct current air conditioner not to start weak magnetic control, and controlling the frequency down-conversion operation of the press. I.e. the compressor is run at a reduced frequency AHz based on the highest frequency without turning on the flux weakening function or at a reduced B% based on the highest frequency without turning on the flux weakening function.
And under the condition that the residual electric quantity of the photovoltaic energy storage system is less than or equal to 60% and more than 30%, acquiring the outdoor environment temperature. And under the condition that the ambient temperature is less than 18 ℃ and people exist indoors, calculating the temperature difference value between the indoor ambient temperature and the user-set temperature. And under the condition that the temperature difference value is greater than or equal to 3 ℃, the weak magnetic function is started, so that the frequency of the press is continuously increased to meet the heating quantity required by a user. And under the condition that the temperature difference value is less than 3 ℃, controlling the direct current air conditioner to operate at the highest frequency without starting the weak magnetic function. And under the condition that the ambient temperature is less than 18 ℃ and no one exists indoors, calculating the temperature difference value between the indoor ambient temperature and the user-set temperature. And under the condition that the temperature difference value is greater than or equal to 3 ℃, controlling the direct current air conditioner to operate at the highest frequency without starting the weak magnetic function. And under the condition that the ambient temperature is less than 18 ℃ and no one exists indoors, calculating the temperature difference value between the indoor ambient temperature and the user-set temperature. And under the condition that the temperature difference value is greater than or equal to 3 ℃, controlling the direct current air conditioner to operate at the highest frequency without starting the weak magnetic function. And under the condition that the temperature difference value is less than 3 ℃, controlling the direct current air conditioner not to start weak magnetic control, and controlling the frequency down-conversion operation of the press. I.e., the compressor is operated at a reduced frequency CHz based on the highest frequency that does not turn on the flux weakening function or at a reduced D% based on the highest frequency that does not turn on the flux weakening function.
And under the condition that the residual electric quantity of the photovoltaic energy storage system is less than 30%, judging whether personnel exist indoors or not. Under the condition that people exist indoors, a power grid is connected to supply power to the air conditioner to control the air conditioner to start the weak magnetic function, so that the frequency of the compressor is continuously increased, and the refrigerating and heating quantities required by users are met. And under the indoor unmanned condition, controlling the frequency down-conversion operation of the press. For example, the operation is performed by down-converting AHz (in the cooling mode) or CHz (in the heating mode) on the basis of the highest frequency at which the field weakening function is not turned on, or by down-converting B (in the cooling mode) or D (in the heating mode) on the basis of the highest frequency at which the field weakening function is not turned on.
As shown in conjunction with fig. 5, an embodiment of the present disclosure provides another method for controlling a dc air conditioner, including:
s01, determining whether the frequency-raising limiting condition is met or not according to the command voltage and the bus voltage of the compressor motor by the direct current air conditioner.
S02, under the condition that the direct current air conditioner meets the frequency-increasing limiting condition, the direct current air conditioner controls the start and stop of the field weakening function according to the residual electric quantity value of the photovoltaic energy storage system so as to improve the utilization rate of electric energy in the photovoltaic energy storage system.
S05, under the condition that the air conditioner needs to execute self-cleaning, the direct current air conditioner starts the field weakening function so as to improve the running frequency of the compressor.
By adopting the method for controlling the direct current air conditioner, which is provided by the embodiment of the disclosure, whether the flux weakening function is started or not can be judged according to the starting requirement of the self-cleaning mode. Specifically, under the condition that the residual electric quantity of the photovoltaic energy storage system is more than 60%, the weak magnetic function is controlled to be started, so that the frequency of the compressor is continuously increased, and the operation frequency required by the self-cleaning function is met. And under the condition that the residual electric quantity of the photovoltaic energy storage system is less than or equal to 60%, judging the running state of the direct current air conditioner before the self-cleaning mode. In the case that the direct current air conditioner is operated in a normal cooling mode/heating mode before entering the self-cleaning mode, it is determined that the user has a temperature regulation requirement at this time. At the moment, the direct current air conditioner is controlled to start the flux weakening function, so that the frequency of the press is continuously increased, and the requirements of a user on temperature adjustment and self-cleaning are met. Before the direct current air conditioner enters the self-cleaning mode, the direct current air conditioner is in a shutdown state, and it is judged that the user has no temperature regulation requirement. At this time, the direct current air conditioner is controlled to operate at the highest frequency at which the field weakening function is not turned on.
As shown in connection with fig. 6, an embodiment of the present disclosure provides another method for controlling a dc air conditioner, including:
s200, the direct current air conditioner obtains the voltage ratio of the effective value of the motor voltage to the bus voltage.
S210, the direct current air conditioner judges whether the voltage ratio is larger than or equal to a ratio threshold. If yes, go to step S220; if not, step S200 is performed.
S230, the direct current air conditioner judges whether the residual electric quantity value is smaller than or equal to an electric quantity threshold value. If yes, step S240 is executed, or step S250 is executed, or step S260 is executed; if not, step S282 is executed.
S240, the direct current air conditioner acquires indoor personnel parameter information.
S241, the direct current air conditioner judges whether a user exists indoors. If yes, go to step S270; if not, step S281 is performed.
S250, the direct current air conditioner acquires time parameter information.
S251, the direct current air conditioner judges whether the current time is larger than a time threshold. If yes, go to step S270; if not, step S281 is performed.
S260, the direct current air conditioner acquires self-cleaning parameter information.
S261, the direct current air conditioner judges whether the self-cleaning parameters meet preset conditions. If yes, go to step S282; if not, step S270 is performed.
S270, the direct current air conditioner obtains a temperature difference value between the indoor environment temperature and the user set temperature.
S280, the direct current air conditioner judges whether the temperature difference value is larger than a temperature difference threshold value. If yes, go to step S282; if not, step S281 is performed.
S281, the direct current air conditioner adjusts the operation frequency of the compressor.
S282, the direct current air conditioner starts weak magnetic control.
By adopting the method for controlling the direct current air conditioner, whether the frequency-increasing limiting condition is met or not can be determined according to the command voltage and the bus voltage of the compressor motor, and the start and stop of the field weakening function are controlled according to the residual electric quantity value of the photovoltaic energy storage system under the condition that the frequency-increasing limiting condition is met so as to improve the utilization rate of electric energy in the photovoltaic energy storage system. The current temperature regulation specific condition is judged according to the residual electric quantity value of the photovoltaic energy storage system before the weak magnetic function is entered, and the weak magnetic function is specifically controlled to be started and stopped from different use angles according to the actual condition of each user. The method adapts to the trend of direct current power generation, improves the accuracy of the start-stop flux weakening function of the direct current air conditioner, and fully utilizes the electric energy stored in the photovoltaic energy storage system.
As shown in connection with fig. 7, an embodiment of the present disclosure provides an apparatus for controlling a direct current air conditioner, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via the bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to perform the method for controlling a dc air conditioner of the above-described embodiment.
Further, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 101 is a computer readable storage medium that can be used to store a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, i.e., implements the method for controlling a dc air conditioner in the above-described embodiment.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. Further, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides a direct current air conditioner, which comprises the device for controlling the direct current air conditioner.
The disclosed embodiments provide a storage medium storing computer executable instructions configured to perform the above-described method for controlling a direct current air conditioner.
The storage medium may be a transitory storage medium or a non-transitory storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (7)
1. A method for controlling a direct current air conditioner, comprising:
determining whether an up-conversion limiting condition is met according to the command voltage and the bus voltage of the compressor motor;
under the condition that the frequency-raising limiting condition is met, controlling the start and stop of the weak magnetic function according to the residual electric quantity value of the photovoltaic energy storage system so as to improve the utilization rate of electric energy in the photovoltaic energy storage system;
wherein, according to the instruction voltage and the busbar voltage of compressor motor, confirm whether to satisfy the restriction condition that rises, include: calculating the voltage ratio of the effective value of the command voltage of the compressor motor to the bus voltage; determining that the up-conversion limiting condition is met under the condition that the voltage ratio is greater than or equal to a ratio threshold;
the start and stop of the weak magnetic function are controlled according to the residual electric quantity value of the photovoltaic energy storage system, and the method comprises the following steps: controlling the flux weakening function to be started under the condition that the residual electric quantity value is larger than an electric quantity threshold value so as to improve the running frequency of the compressor; when the residual electric quantity value is smaller than or equal to the electric quantity threshold value, controlling the start and stop of the weak magnetic function according to the related parameter information; the related parameter information comprises outdoor environment temperature, time parameter information, indoor personnel parameter information and user set temperature.
2. The method of claim 1, wherein controlling the start and stop of the flux weakening function according to the related parameter information comprises:
determining a target operating frequency of the compressor according to the outdoor environment temperature and the time parameter information;
and controlling the start and stop of the weak magnetic function according to the target operating frequency and the temperature value set by the user.
3. The method of claim 1, wherein controlling the start and stop of the flux weakening function according to the related parameter information comprises:
determining a target operating frequency of the compressor according to the outdoor environment temperature and the indoor personnel parameter information;
and controlling the start and stop of the weak magnetic function according to the target operating frequency and the temperature value set by the user.
4. A method according to claim 2 or 3, wherein said controlling the start and stop of the flux weakening function according to the target operating frequency and a user set temperature value comprises:
determining a temperature difference value between the current indoor temperature and the user-set temperature;
and under the condition that the temperature difference is greater than or equal to a temperature difference threshold, starting the weak magnetic function so as to improve the running frequency of the compressor.
5. The method according to any one of claims 1 to 4, further comprising, after said controlling the start-stop of the flux weakening function:
and under the condition that the air conditioner needs to perform self-cleaning, starting the weak magnetic function so as to improve the running frequency of the compressor.
6. An apparatus for controlling a direct current air conditioner comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for controlling a direct current air conditioner according to any one of claims 1 to 5 when the program instructions are executed.
7. A direct current air conditioner comprising the apparatus for controlling a direct current air conditioner according to claim 6.
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| CN117515840A (en) * | 2022-07-29 | 2024-02-06 | 青岛海尔空调器有限总公司 | Control method and device for air conditioner, air conditioner and storage medium |
| CN117515841A (en) * | 2022-07-29 | 2024-02-06 | 青岛海尔空调器有限总公司 | Control method and device for air conditioner, air conditioner and storage medium |
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