CN114608160B - Method and device for controlling direct-current air conditioner and air conditioner - Google Patents
Method and device for controlling direct-current air conditioner and air conditioner Download PDFInfo
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- CN114608160B CN114608160B CN202210150748.4A CN202210150748A CN114608160B CN 114608160 B CN114608160 B CN 114608160B CN 202210150748 A CN202210150748 A CN 202210150748A CN 114608160 B CN114608160 B CN 114608160B
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- 230000003313 weakening effect Effects 0.000 claims abstract description 26
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- 230000004907 flux Effects 0.000 claims abstract description 9
- 230000006870 function Effects 0.000 claims description 35
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- 238000010248 power generation Methods 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 description 29
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- 238000004891 communication Methods 0.000 description 9
- 238000011161 development Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
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- 230000000630 rising effect Effects 0.000 description 5
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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
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 steps of determining whether an up-conversion limiting condition is met according to command voltage and bus voltage of a compressor motor; and under the condition that the frequency-increasing limiting condition is met, controlling the start and stop of the weak magnetic function according to the indoor environment temperature so as to enable the indoor environment temperature to be within a target temperature range. The specific condition of current temperature adjustment is judged according to the indoor environment temperature before the weak magnetic function is started, and the start and stop control of the weak magnetic function is carried out according to the actual condition of home temperature adjustment 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 saves electric energy. The application also discloses a device for controlling the direct current air conditioner and the air conditioner.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, in particular to a method and a device for controlling a direct current air conditioner and the 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 related art discloses that in order to ensure the effect of cooling or heating under the condition that the bus voltage reaches the limit of frequency rising, 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:
because of 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, and the direct current air conditioner frequently reaches the frequency-up limit, so that the condition of weak magnetic control is entered, electric energy is wasted greatly, and the applicability is poor.
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 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 save electric energy.
In some embodiments, the method comprises: determining whether an up-conversion limiting condition is met according to the command voltage and the bus voltage of the compressor motor; and under the condition that the frequency-increasing limiting condition is met, controlling the start and stop of the weak magnetic function according to the indoor environment temperature so as to enable the indoor environment temperature to be within a target temperature range.
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 executing the program instructions.
In some embodiments, the 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 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 and the bus voltage of the compressor motor, and controlling the start and stop of the flux weakening function according to the indoor environment temperature under the condition that the frequency-increasing limiting condition is met so as to enable the indoor environment temperature to be within a target temperature range. The specific condition of current temperature adjustment is judged according to the indoor environment temperature before the weak magnetic function is started, and the start and stop control of the weak magnetic function is carried out according to the actual condition of home temperature adjustment 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 saves electric energy.
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 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, the air conditioner determines whether an up-conversion limiting condition is met according to the command voltage and the bus voltage of the compressor motor.
S02, under the condition that the air conditioner meets the frequency-increasing limiting condition, the start and stop of the field weakening function are controlled according to the indoor environment temperature so that the indoor environment temperature is within the target temperature range.
By adopting the method for controlling the direct current air conditioner provided by the embodiment of the disclosure, whether the frequency-increasing limiting condition is met or not is determined according to the instruction voltage and the bus voltage of the compressor motor, and under the condition that the frequency-increasing limiting condition is met, the start and stop of the flux weakening function are controlled according to the indoor environment temperature so that the indoor environment temperature is within the target temperature range. The specific condition of current temperature adjustment is judged according to the indoor environment temperature before the weak magnetic function is started, and the start and stop control of the weak magnetic function is carried out according to the actual condition of home temperature adjustment 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 saves electric energy.
As shown in conjunction with fig. 2, an embodiment of the present disclosure provides a method for controlling a dc air conditioner, including:
s21, the air conditioner calculates the voltage ratio of the effective value of the command voltage of the compressor motor to the bus voltage.
S22, the air conditioner determines whether the up-conversion limiting condition is met according to the voltage ratio.
S02, under the condition that the air conditioner meets the frequency-increasing limiting condition, the start and stop of the field weakening function are controlled according to the indoor environment temperature so that the indoor environment temperature is within the target temperature range.
By adopting the method for controlling the direct current air conditioner provided by the embodiment of the disclosure, the air conditioner calculates the voltage ratio of the effective value of the command voltage of the compressor motor to the bus voltage, and determines whether the frequency-raising limiting condition is met according to the voltage ratio. 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 air conditioner determines whether the up-conversion limitation condition is satisfied according to the voltage ratio, including: the air conditioner determines that the frequency-increasing limiting condition is met under the condition that the voltage ratio is larger than or equal to the ratio threshold value; and under the condition that the voltage ratio is smaller than the ratio threshold value, the air conditioner determines that the frequency-up limiting condition is not met.
Thus, when 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, 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 conjunction with fig. 3, an embodiment of the present disclosure provides a method for controlling a dc air conditioner, including:
s01, the air conditioner determines whether an up-conversion limiting condition is met according to the command voltage and the bus voltage of the compressor motor.
S31, under the condition that the air conditioner meets the frequency-increasing limiting condition, determining a target temperature range, and detecting the current indoor environment temperature.
S32, under the condition that the current ambient temperature is out of the target temperature range, the air conditioner starts the weak magnetic function so as to improve the running frequency of the compressor and enable the indoor ambient temperature to be in the target temperature range.
By adopting the method for controlling the direct current air conditioner provided by the embodiment of the disclosure, the air conditioner does not enter the field weakening control first under the condition that the frequency raising limiting condition is met, but judges the current indoor temperature condition first, namely the air conditioner determines the target temperature range and detects the current indoor environment temperature. Under the condition that the current ambient temperature is out of the target temperature range, the effect of temperature regulation is poor, the requirement of a user on indoor ambient temperature cannot be met, and the temperature regulation capability of the air conditioner needs to be improved. However, the compressor has reached the frequency-increasing limiting condition, and the frequency-increasing can not be continued to improve the temperature adjusting capability of the air conditioner, so that the air conditioner starts the field weakening function to improve the operating frequency of the compressor, and the indoor environment temperature is in the target temperature range. The field weakening function is started timely according to the actual condition of the temperature regulation of each user by judging the specific condition of the current temperature regulation according to the indoor environment temperature before the field weakening function is started. The method adapts to the trend of direct current power generation and improves the accuracy of the on-off field weakening function of the direct current air conditioner.
Optionally, the air conditioner determines the target temperature range, including: the air conditioner calculates the sum of the set temperature and the set deviation value of the air conditioner, and takes the sum as the maximum temperature value of the target temperature range; the air conditioner calculates the difference between the set temperature and the set deviation value, and takes the difference as the minimum temperature value of the target temperature range.
Wherein, the setting deviation value is set according to the user demand. For example, it may be 0.5 ℃, 1 ℃ or 1.5 ℃ or the like.
Thus, the air conditioner calculates the sum of the set temperature and the set deviation value of the air conditioner, and takes the sum as the maximum temperature value of the target temperature range. The air conditioner calculates the difference between the set temperature and the set deviation value, and takes the difference as the minimum temperature value of the target temperature range. Under the condition that the indoor environment temperature is between the maximum temperature value and the minimum temperature value, the indoor environment temperature can meet the requirements of users. And under the condition that the indoor environment temperature is beyond the maximum temperature value and the minimum temperature value, the indoor environment temperature cannot meet the requirements of users. By determining the target temperature range, frequent closing or starting of the weak magnetic function caused by up-and-down fluctuation of the indoor environment temperature is avoided, and electric energy is saved.
As shown in conjunction with fig. 4, an embodiment of the present disclosure provides a method for controlling a dc air conditioner, including:
s01, the air conditioner determines whether an up-conversion limiting condition is met according to the command voltage and the bus voltage of the compressor motor.
S31, under the condition that the air conditioner meets the frequency-increasing limiting condition, determining a target temperature range, and detecting the current indoor environment temperature.
S32, under the condition that the current ambient temperature is out of the target temperature range, the air conditioner starts the weak magnetic function so as to improve the running frequency of the compressor and enable the indoor ambient temperature to be in the target temperature range.
S41, after the air conditioner starts the field weakening function, judging whether the green power supply meets the preset condition.
S42, the air conditioner is connected with the green power supply under the condition that the green power supply meets the preset condition; and under the condition that the green power supply does not meet the preset condition, the power grid is connected.
The preset condition comprises that the electricity storage capacity of the green power supply is larger than an electricity quantity threshold value or the voltage of the green power supply is larger than a voltage threshold value. Whether the green power supply meets the preset condition or not can also be determined according to the indoor illumination value, for example, when the indoor illumination value of the air conditioner is larger than the illumination threshold value, the green power supply is determined to meet the preset condition.
By adopting the method for controlling the direct current air conditioner provided by the embodiment of the disclosure, after the air conditioner starts the field weakening function, whether the green power supply meets the preset condition is judged. Under the condition that the green power supply meets the preset condition, the condition that the bus voltage is unstable and the weak magnetic control is unstable can not occur when the electric energy of the green power supply is sufficient, and the green power supply is turned on at the moment. Under the condition that the green power supply does not meet the preset condition, the condition that the power of the green power supply is insufficient at the moment is indicated, the busbar voltage possibly fluctuates, and in order to ensure stable operation of the field weakening control, a power grid is connected at the moment so as to raise the frequency of the compressor and improve the indoor environment temperature. In the process of field weakening control, the environment-friendly power supply and the power grid are switched through preset conditions, so that the running stability of the air conditioner and the comfort level of a user are improved.
As shown in fig. 5, an embodiment of the present disclosure provides a method for controlling a dc air conditioner, including:
s01, the air conditioner determines whether an up-conversion limiting condition is met according to the command voltage and the bus voltage of the compressor motor.
S31, under the condition that the air conditioner meets the frequency-increasing limiting condition, determining a target temperature range, and detecting the current indoor environment temperature.
S32, under the condition that the current ambient temperature is out of the target temperature range, the air conditioner starts the weak magnetic function so as to improve the running frequency of the compressor and enable the indoor ambient temperature to be in the target temperature range.
S51, the air conditioner reduces the operation frequency of the compressor under the condition that the current environment temperature is within the target temperature range.
By adopting the method for controlling the direct current air conditioner provided by the embodiment of the disclosure, when the current ambient temperature of the air conditioner is within the target temperature range, the indoor ambient temperature at the moment is indicated to meet the requirements of users, and the compressor is not required to be continuously increased in frequency, so that the temperature regulation effect is improved. Therefore, the operating frequency of the compressor can be appropriately reduced to save electric power. Before the field weakening control is performed, the indoor environment temperature is monitored, the field weakening function is not performed under the condition that the indoor environment temperature meets the user requirement, and the electric energy is greatly saved by reducing the frequency of the compressor.
Optionally, the air conditioner reduces an operation frequency of the compressor, including: the air conditioner determines a target operating frequency according to the current air outlet temperature of the air conditioner; the air conditioner adjusts an operation frequency of the compressor to a target operation frequency.
Thus, the air conditioner determines a target operating frequency according to the current air outlet temperature of the air conditioner, and adjusts the operating frequency of the compressor to the target operating frequency. By considering the air outlet temperature and the operation frequency of the compressor, the air conditioner temperature adjusting effect is guaranteed, the operation frequency of the compressor is reduced, and electric energy is saved.
Optionally, the determining, by the air conditioner according to the current air outlet temperature of the air conditioner, the target operating frequency includes: the air conditioner determines a target air outlet temperature according to the target temperature range; the air conditioner calculates a first difference value between the current air outlet temperature and the target air outlet temperature; the air conditioner determines a frequency deviation value corresponding to the first difference value according to a preset corresponding relation; the air conditioner calculates a second difference value between the current operating frequency and the frequency deviation value, and determines the second difference value as the target operating frequency.
When the air conditioner outputs air at the target air outlet temperature, the indoor environment temperature can be within the target temperature range.
Thus, the air conditioner determines the target air outlet temperature through the target temperature range, and the indoor environment temperature can be within the target temperature range. The air conditioner calculates a first difference value between the current air outlet temperature and the target air outlet temperature, and determines a frequency deviation value corresponding to the first difference value according to a preset corresponding relation. The air conditioner calculates a second difference value between the current operating frequency and the frequency deviation value, and determines the second difference value as the target operating frequency. The target operating frequency is determined through the target air outlet temperature, so that the operating frequency of the compressor is reduced under the condition that the indoor environment temperature is kept within the target temperature range, electric energy is greatly saved, and the method is suitable for the development trend of a direct current power supply.
As shown in connection with fig. 6, 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 an air conditioner, which comprises the device for controlling a 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 disclosure is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in the present disclosure, the terms "comprises," "comprising," and/or variations thereof, mean that the recited features, integers, steps, operations, elements, and/or components are present, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. 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-increasing limiting condition is met, controlling the start and stop of the weak magnetic function according to the indoor environment temperature so as to enable the indoor environment temperature to be within a target temperature range;
the determining whether the up-conversion limiting condition is satisfied according to the command voltage and the bus voltage of the compressor motor comprises: calculating the voltage ratio of the effective value of the command voltage of the compressor motor to the bus voltage; determining whether the up-conversion limiting condition is met according to the voltage ratio; 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; determining that the frequency-up limiting condition is not met under the condition that the voltage ratio is smaller than the ratio threshold;
the method for controlling the start and stop of the flux weakening function according to the indoor environment temperature comprises the following steps: determining the target temperature range and detecting the current indoor environment temperature; starting the flux weakening function to increase the operating frequency of the compressor when the current ambient temperature is outside the target temperature range; reducing the operating frequency of the compressor if the current ambient temperature is within the target temperature range;
the determining the target temperature range includes: calculating the sum of the set temperature and the set deviation value of the air conditioner, and taking the sum as the maximum temperature value of the target temperature range; and calculating a difference value between the set temperature and the set deviation value, and taking the difference value as a minimum temperature value of the target temperature range.
2. The method of claim 1, wherein after said activating said flux weakening function, further comprising:
judging whether the green power supply meets preset conditions or not;
switching on the green power supply under the condition that the green power supply meets the preset condition; when the green power supply does not meet the preset condition, the power grid is connected;
the preset condition includes that the electricity storage capacity of the green power supply is larger than an electricity quantity threshold value or the voltage of the green power supply is larger than a voltage threshold value.
3. The method of claim 2, wherein the preset conditions further comprise:
and under the condition that the indoor illumination value is larger than the illumination threshold value, determining that the green power supply meets the preset condition.
4. The method of claim 1, wherein said reducing the operating frequency of said compressor comprises:
determining a target operating frequency according to the current air outlet temperature of the air conditioner;
and adjusting the operating frequency of the compressor to the target operating frequency.
5. The method of claim 4, wherein determining the target operating frequency based on the current outlet air temperature of the air conditioner comprises:
determining a target air outlet temperature according to the target temperature range;
calculating a first difference value between the current air-out temperature and the target air-out temperature;
determining a frequency deviation value corresponding to the first difference value according to a preset corresponding relation;
calculating a second difference value between the current operating frequency and the frequency deviation value, and determining the second difference value as the target operating frequency;
when the air conditioner outputs air at the target air outlet temperature, the indoor environment temperature can be within the target temperature range.
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 executing the program instructions.
7. An air conditioner comprising the apparatus for controlling a direct current air conditioner according to claim 6.
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