CN111854084A - Control method and control device of variable frequency air conditioner and variable frequency air conditioner - Google Patents
Control method and control device of variable frequency air conditioner and variable frequency air conditioner Download PDFInfo
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- CN111854084A CN111854084A CN201910345360.8A CN201910345360A CN111854084A CN 111854084 A CN111854084 A CN 111854084A CN 201910345360 A CN201910345360 A CN 201910345360A CN 111854084 A CN111854084 A CN 111854084A
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
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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
Abstract
The application relates to a control method and a control device of a variable frequency air conditioner and the variable frequency air conditioner. The control method of the variable frequency air conditioner comprises the following steps: determining the target frequency f of the air conditioner operation according to the outdoor environment temperature Tao; judging the relation between the target frequency f and the winding boundary frequency f4 of the motor of the air-conditioning compressor, determining the motor winding mode and the oil return pause strategy of the air conditioner according to the relation between the target frequency f and the winding boundary frequency f4, and inserting an oil return pause platform in the process that the air-conditioning frequency is adjusted to the target frequency f from the winding boundary frequency f 4. According to the control method of the variable frequency air conditioner, the target frequency f of the air conditioner can be combined with the state switching of the coil winding and the oil return control of the air conditioner, the fine control of the operation of the air conditioner is realized, and the operation energy efficiency of the air conditioner is improved.
Description
Technical Field
The present application relates to the field of air conditioning technologies, and for example, to a control method and a control device for an inverter air conditioner, and an inverter air conditioner.
Background
At present, along with the development of economy and the improvement of living standard, people have higher demands on variable frequency air conditioners with better comfort regulation and energy conservation.
When the air conditioner compressor of the existing air conditioner runs at certain frequency, resonance can be generated with a shell, a motor, a pipeline and the like, so that the noise is poor, and the pipeline stress exceeds the standard. After the air conditioner appeared protecting and removed, should slow running let the system stabilize, however along with the difference of outdoor outside operating mode, the interior machine running load is different, to some special cases, can make air condition compressor's operation process unstable to probably lead to the unable normal operating of air condition compressor, cause the unstability of compressor operation.
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 nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a control method and a control device of a variable frequency air conditioner and the variable frequency air conditioner, which can combine the target frequency f of the air conditioner with the state switching of a coil winding, and insert an oil return pause platform for oil return at the same time, so that the fine control of the operation of the air conditioner is realized, the oil return of the air conditioner is ensured, and the operation energy efficiency of the air conditioner is improved.
According to an aspect of the disclosed embodiments, a control method of an inverter air conditioner is provided.
In some optional embodiments, the method comprises:
determining the target frequency f of the air conditioner operation according to the outdoor environment temperature Tao;
and judging the relation between the target frequency f and the winding boundary frequency f4, and determining the motor winding mode and the oil return pause strategy of the air conditioner according to the relation between the target frequency f and the winding boundary frequency f 4.
According to an aspect of the disclosed embodiments, a control apparatus of an inverter air conditioner is provided.
In some optional embodiments, the apparatus comprises:
a calculation module configured to determine a target frequency f of air conditioner operation according to the outdoor ambient temperature Tao;
a determination module configured to determine a relationship between a target frequency f and a winding trip point frequency f 4;
and the control module is configured to determine a motor winding mode and an oil return pause strategy of the air conditioner according to the relation between the target frequency f and the winding dividing point frequency f4, and insert an oil return pause platform in the process that the air conditioner frequency is adjusted to the target frequency f from the winding dividing point frequency f 4.
According to one aspect of the disclosed embodiments, there is provided an inverter air conditioner.
In some optional embodiments, the inverter air conditioner comprises the control device.
According to one aspect of the disclosed embodiments, there is provided an inverter air conditioner.
Some technical solutions provided by the embodiments of the present disclosure can achieve the following technical effects:
the method has the advantages that the relation between the target frequency f and the winding dividing point frequency f4 and the winding mode switching of the coil can be combined, the winding mode of the motor coil is adjusted according to the relation between the target frequency f and the winding dividing point frequency f4, so that the operating frequency of the air conditioner can be always matched with the winding mode of the coil in the frequency adjusting process of the air conditioner, the starting current of the motor can be reduced, the large torque output of the motor can be realized, the fine control of the air conditioner operation is realized, and the operating energy efficiency of the air conditioner is improved. Meanwhile, the oil return pause platform is inserted in the air conditioner frequency conversion process, so that the air conditioner can be controlled to return oil in the air conditioner frequency conversion process, the compressor is prevented from being damaged due to insufficient oil return in the air conditioner frequency conversion process, and the compressor is effectively protected from running.
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 in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a flowchart illustrating a control method of an inverter air conditioner according to an embodiment of the present disclosure;
fig. 2 is another schematic flow chart illustrating a control method of an inverter air conditioner according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of an embodiment of a control device of an inverter air conditioner according to an embodiment of the disclosure;
fig. 4 is a schematic diagram of another embodiment of a control device of an inverter air conditioner according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of another embodiment of a control device of an inverter air conditioner according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a computing module of a control device of an inverter air conditioner according to an embodiment of the disclosure;
fig. 7 is a schematic structural diagram of an electronic device provided in an embodiment of the present disclosure.
Reference numerals;
10-a calculation module 20-a judgment module; 30-a control module; 40-frequency comparison module; 50-wind speed comparison module; 60-a real-time detection module; 100-a processor; 101-a memory; 102-a communication interface; 103-bus.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. 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 be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
Referring to fig. 1 in combination, an embodiment of the present disclosure provides a control method of an inverter air conditioner, including:
s1, determining the target frequency f of the air conditioner operation according to the outdoor environment temperature Tao;
alternatively, for example, the air conditioner may be powered on in a cooling mode, and the air conditioner may be provided with a real-time detection module 60, a calculation module 10, a determination module 20, and a control module 30, where the real-time detection module 60 obtains the outdoor ambient temperature Tao through a temperature sensor, and certainly, the outdoor ambient temperature may also be directly obtained through other modules, and then the calculation module 10 calculates the target frequency f.
S2, judging the relation between the target frequency f and the winding dividing point frequency f4 of the motor of the air-conditioning compressor, determining the motor winding mode and the oil return pause strategy of the air conditioner according to the relation between the target frequency f and the winding dividing point frequency f4, and inserting an oil return pause platform in the process that the air-conditioning frequency is adjusted to the target frequency f from the winding dividing point frequency f 4.
In the embodiment of the present disclosure, a temperature detection device, such as a temperature sensor, may be used to obtain the outdoor ambient temperature Tao, then the calculation module calculates the target frequency f of the air conditioner operation according to the outdoor ambient temperature Tao, then the judgment module judges the relationship between the target frequency f and the winding dividing point frequency f4, and transmits the judgment result to the control module 10, and the control module 10 determines the motor winding mode according to the judgment result; finally, the determination module determines the winding mode of the motor according to the control command sent by the control module 10. When the target frequency f is greater than the winding division point frequency f4, firstly, the air conditioning frequency is operated to the winding division point frequency f4, then the motor winding mode is switched, after the motor winding mode is switched, the air conditioning frequency is adjusted to the target frequency f from the winding division point frequency f4, in the adjusting process, an oil return pause platform is inserted for oil return treatment, and the reliability and the stability of the operation of the compressor are ensured.
When the control method is used for controlling the variable frequency air conditioner, the relation between the target frequency f and the winding dividing point frequency f4 and the winding mode switching of the coil can be combined, and the winding mode of the motor coil is adjusted according to the relation between the target frequency f and the winding dividing point frequency f4, so that the operating rate of the air conditioner can be always matched with the winding mode of the coil in the frequency adjustment process of the air conditioner, the starting current of the motor can be reduced, the large torque output of the motor can be realized, the fine control of the air conditioner operation is realized, and the operating energy efficiency of the air conditioner is improved. Meanwhile, the oil return pause platform is inserted in the air conditioner frequency conversion process, so that the air conditioner can be controlled to return oil in the air conditioner frequency conversion process, the compressor is prevented from being damaged due to insufficient oil return in the air conditioner frequency conversion process, and the compressor is effectively protected from running.
The winding dividing point frequency f4 may be set by a user based on actual motor parameters, or may be calculated and determined directly by a controller or the like.
In the embodiment of the present disclosure, the target frequency F is F × K, where F is a rated frequency of the air conditioner, K is a frequency coefficient, and K is related to the ambient temperature.
The air conditioner may be in a cooling or heating mode.
The step of inserting the oil return pause platform in the process of adjusting the air conditioning frequency from the winding dividing point frequency f4 to the target frequency f comprises the following steps: if the target frequency f is greater than the winding dividing point frequency f4, controlling the motor to select a first winding mode, and operating the air-conditioning frequency to the winding dividing point frequency f4 in the first winding mode; after the air-conditioning frequency reaches a winding dividing point frequency f4, controlling the motor to select a second winding mode, and operating the air-conditioning frequency to a target frequency f in the second winding mode; and inserting an oil return pause platform in the process of operating the air conditioning frequency from the winding dividing point frequency f4 to the target frequency f.
The step of inserting the oil return pause platform in the process of operating the air conditioning frequency from the winding dividing point frequency f4 to the target frequency f comprises the following steps: after the air conditioning frequency reaches a winding division point frequency f4, the air conditioning frequency is operated to a first frequency f1 at a first frequency modulation speed V1, and the air conditioning frequency enters a first oil return stopping platform and lasts for t1 time; after the first oil return pause platform is finished, the air conditioner runs to a second frequency f2 at a second frequency modulation speed V2, and enters the second oil return pause platform for t2 time; after the second oil return pause platform is finished, the air conditioner runs to a third frequency f3 at a third frequency modulation speed V3, and enters the third oil return pause platform for t3 time; after the third oil return pause platform is finished, the air-conditioning frequency is operated to the target frequency f at a fourth frequency modulation speed V4, wherein a motor winding of the air-conditioning compressor is set to be a first winding with high impedance and a second winding with low impedance, the winding dividing point frequency f4 of the first winding and the second winding is set, the frequency of the first oil return pause platform is f1, the frequency of the second oil return pause platform is f2, the frequency of the third oil return pause platform is f3, and f1, f2 and f3 are all larger than f 4.
Specifically, the winding mode of the motor is set to be star-shaped and triangle-shaped, the frequency f4 of a boundary point of the motor is set, the frequency f4 of a winding switching boundary point is set to be 65Hz (which can be adjusted according to the winding parameters of the motor), the winding structure of the motor is switched through a winding switching part, the star-shaped or triangle-shaped wiring mode is selected, and the first frequency f1(75Hz is adjustable) time of a first oil return pause platform is set to be first pause time t1(1min is adjustable); the second frequency of the second oil return pause platform is f2 (adjustable at 85 Hz), and the time is a second pause time t2 (adjustable at 1 min); and the third frequency of the third oil return pause platform is f3 (adjustable at 95 Hz), and the third pause time t3 (adjustable at 1 min) is obtained.
As shown in fig. 2, in some embodiments, the method further comprises: s101, correcting the target frequency f according to a windshield of the outdoor fan of the air conditioner, and when the wind speed r of the windshield of the outdoor fan of the air conditioner is less than or equal to r1, negatively correcting the target frequency; when r is larger than r2, the target frequency is corrected in the forward direction, wherein r1 and r2 are preset wind speed values.
When different windshields exist in the outdoor unit of the air conditioner, after the target frequency f is obtained through the calculation, the target frequency f is corrected according to the windshields of the outdoor fan of the air conditioner; when the wind speed r of the wind shield of the outdoor fan of the air conditioner is less than or equal to r1, the target frequency is corrected in a negative direction to prevent the coagulation or freezing; when r is greater than r1 and less than or equal to r2, the target frequency is not corrected; when r is larger than r2, the target frequency is corrected in positive direction to prevent the superheat degree from being larger and reduce the capacity output of the evaporator.
Optionally, when the damper exists in the outdoor unit of the air conditioner, F is F × K + c, where F is the rated frequency of the operation of the air conditioner, K is a frequency coefficient, K is related to the outdoor ambient temperature, c is a frequency correction value, and 0 < K < 1.
For example, K is 0.5, and the damper of the outdoor fan is set to mute, low wind, medium wind, high wind and strong force, and the corresponding rotation speeds r are 500rpm, 800rpm, 1200rpm, 1500rpm and 1700rpm (rpm is an abbreviation of Revolutions Per minute); the preset wind speed values r1 and r2 are 900rpm and 1500rpm respectively.
And determining c according to the current wind speed of the outdoor fan windshield according to F, K and c, calculating F, and selecting a star winding mode to control the air conditioner compressor to frequency-modulate to the target frequency F if the fact that F is less than or equal to F4 is judged in step S2, wherein in the process, the frequency-modulated speed of the air conditioner compressor can be operated to the target frequency F according to 0.5 Hz/S. Otherwise, if the calculated f is larger than or equal to f4, firstly selecting a star winding mode and enabling the air conditioner compressor to operate to a winding dividing point frequency f4 according to 0.5Hz/s, at the moment, controlling and switching to triangular winding wiring, and enabling the air conditioner compressor to be tuned to a target frequency f, wherein the constant-speed frequency modulation or the frequency modulation to the target frequency can be selected in the process.
Alternatively, in step S2, the motor and the air-conditioning compressor are connected by a winding switching unit, the winding configuration of the motor is switched by the winding switching unit, and the winding switching unit is controlled to switch the operation according to the results of the determinations of f and f 4.
The motor is a three-phase motor having three-phase windings of U-phase, V-phase, and W-phase, and two terminals of each phase winding of the motor are connected to the winding switching unit, and the winding switching unit switches the connection of the terminals to a star winding connection as the first winding system or a delta winding connection as the second winding system.
Optionally, when the outdoor unit of the air conditioner has no windshield, i.e. in a mute mode, the target frequency F is F × K, where F is a rated frequency of the air conditioner, K is a frequency coefficient, K is related to the outdoor ambient temperature, and 0 < K < 1.
For example, K is 0.5, and the rotation speed r when the outdoor fan is muted is 500rpm (rpm is an abbreviation of revolutionper minute, and is rpm).
And determining a target frequency F according to the F-F-K, wherein the F-F is 200Hz, the K is 0.5, and the F is 100HZ, and further judging that the F is greater than F4 in step S2, selecting a star winding mode, and controlling the air conditioner compressor to frequency-modulate to the target frequency F, wherein the frequency-modulating speed of the air conditioner compressor can be operated to the target frequency F according to 0.5Hz/S in the process. Otherwise, if the calculated f is larger than or equal to f4, firstly selecting a star winding mode and enabling the air conditioner compressor to operate to a winding dividing point frequency f4 according to 0.5Hz/s, at the moment, controlling and switching to triangular winding wiring, and enabling the air conditioner compressor to be tuned to a target frequency f, wherein the constant-speed frequency tuning can be selected to the target frequency in the process. The frequency modulation may be an up-conversion or a down-conversion, and needs to be determined by referring to the relationship between the current operating frequency of the air conditioner and f 4.
The embodiment of the disclosure provides a control device of a variable frequency air conditioner.
Referring to fig. 3 in combination, in some embodiments, the control device of the inverter air conditioner includes:
a calculation module 10 configured to determine a target frequency f of air conditioner operation according to the outdoor ambient temperature Tao;
a determination module 20 configured to determine a relationship between a target frequency f and a winding trip point frequency f 4;
and the control module 30 is configured to determine a motor winding mode and an oil return pause strategy of the air conditioner according to the relation between the target frequency f and the winding dividing point frequency f4, and insert an oil return pause platform in the process of adjusting the air conditioner frequency from the winding dividing point frequency f4 to the target frequency f.
In this embodiment, the calculation module 10 calculates a target frequency f through the obtained outdoor ambient temperature Tao, the determination module 20 determines a magnitude relationship between f and f4 according to the calculated target frequency f, the control module 30 controls the air-conditioning compressor to select the first winding mode of the motor and operate the air-conditioning compressor to the target frequency f according to the determination result of the determination module 20 that f is less than f4, and if f is greater than or equal to f4, the air-conditioning compressor is controlled to select the first winding mode (star winding mode) of the motor and operate the air-conditioning compressor to the winding dividing point frequency f4, the connection is switched to the second winding mode (delta winding mode), the air-conditioning compressor is operated to the target frequency f, and three oil return pause platforms are inserted in the process.
In this embodiment, the control module 30 selects the first winding manner and operates the air-conditioning compressor to the winding boundary frequency f4 according to the judgment result of the judgment module 20 that f is greater than f4, switches to the second winding manner for wiring, then continues to operate the compressor, operates the air-conditioning compressor to the first oil return pause platform for the first pause time t1, and operates the air-conditioning compressor to the second oil return pause platform for the second pause time t2 after the first pause time is over; after the second pause time is finished, the air conditioner compressor is operated to a third oil return pause platform for a third pause time t 3; and operating the air conditioner compressor to the target frequency f after the third dwell time is finished.
As shown in fig. 4, in some embodiments, the apparatus further comprises:
the frequency comparison module 40 is configured to compare the operating frequency of the air conditioner compressor with the winding dividing point frequency f4, obtain a comparison result, and send the comparison result to the control module 30;
the control module 30 controls the motor winding mode and the operating frequency of the air conditioner compressor according to the received comparison result of the frequency comparison module 40, and continuously controls the operating frequency of the air conditioner compressor.
In this embodiment, after the determination module 20 determines the magnitude results of f and f4, the frequency comparison module 40 compares the operating frequency of the air conditioner compressor with the winding dividing point frequency f4, and sends the comparison result to the control module 30, and the control module 30 controls the winding manner of the motor of the air conditioner compressor according to the comparison result, so as to control the operating frequency of the air conditioner compressor to operate to the target frequency value.
As shown in fig. 4, in some embodiments, the apparatus further comprises:
a wind speed comparison module 50 configured to compare a wind speed of a windshield of the outdoor unit with a preset wind speed, obtain a comparison result, and send the comparison result to the control module 30;
the control module 30 corrects the target frequency f according to the comparison result of the wind speed comparison module 50.
In this embodiment, on the basis of the frequency comparison module 40, the comparison result obtained by the wind speed comparison module 50 may be sent to the control module 30, the control module 30 corrects the target frequency according to the comparison result of the wind speed comparison module 50, the determination module 20 determines the magnitude relationship between f and f4 according to the corrected target frequency f, and then sends the relationship to the control module 30, and the control module 30 controls the motor winding mode of the air conditioner compressor according to the determination result, so as to control the operation frequency of the air conditioner compressor to reach the target frequency value.
As shown in fig. 5, in some embodiments, the apparatus further comprises:
the real-time detection module 60 is configured to detect the operating frequency, the windshield wind speed and the outdoor environment temperature of the air conditioner compressor in real time, and send the detected outdoor environment temperature to the calculation module 10, the detected operating frequency of the air conditioner compressor to the frequency comparison module 40, and the detected windshield wind speed of the air conditioner compressor to the wind speed comparison module 50 respectively.
In this embodiment, the frequency comparison module 40 and the wind speed comparison module 50 may obtain corresponding parameters by detecting the operating frequency of the air conditioner compressor and the wind speed of the windshield in real time through the real-time detection module 60, and the calculation module 10 may also obtain corresponding parameters by detecting the outdoor environment temperature in real time through the real-time detection module 60.
As shown in fig. 6, in some embodiments, the calculation module 10 is configured to calculate the target frequency f according to the outdoor ambient temperature Tao result.
In this embodiment, the outdoor ambient temperature Tao is first obtained by the outdoor ambient temperature sensor, and then the calculation module 10 calculates the target frequency f by using the Tao.
The embodiment of the disclosure provides a variable frequency air conditioner.
The embodiment of the disclosure also provides a variable frequency air conditioner, which comprises the control device.
The embodiment of the present disclosure further provides a variable frequency air conditioner, including: at least one processor; and
a memory communicatively coupled to the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions, when executed by the at least one processor, cause the at least one processor to execute the control method.
The embodiment of the disclosure also provides a computer-readable storage medium, which stores computer-executable instructions configured to execute the control method.
The disclosed embodiments also provide a computer program product comprising a computer program stored on a computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the above-described control method.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
An embodiment of the present disclosure further provides an electronic device, a structure of which is shown in fig. 7, and the electronic device includes:
at least one processor (processor)100, one processor 100 being exemplified in fig. 3; and a memory (memory)101, and may further include 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 a 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 control method of the above-described embodiment.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes the functional application and data processing by executing the software program, instructions and modules stored in the memory 101, that is, implements the control method in the above-described method 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, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only memory (ROM, Read-Onl star memory), a Random Access Memory (RAM), a magnetic disk or an optical disk, and may also be transient storage media.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify 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. The scope of the disclosed embodiments includes the full ambit of the claims, as well as all available equivalents of the claims. As used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, unless the meaning of the description changes, so long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first and second elements are both elements, but may not be the same element. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "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, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, 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 an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would 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 may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart 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. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A control method of an inverter air conditioner is characterized by comprising the following steps:
determining the target frequency f of the air conditioner operation according to the outdoor environment temperature Tao;
Judging the relation between the target frequency f and the winding dividing point frequency f4 of the motor of the air conditioner compressor;
and determining a motor winding mode and an oil return pause strategy of the air conditioner according to the relation between the target frequency f and the winding dividing point frequency f4, and inserting an oil return pause platform in the process of adjusting the air conditioner frequency from the winding dividing point frequency f4 to the target frequency f.
2. The method of claim 1, wherein inserting an oil return tie-down platform during the adjustment of the air conditioning frequency from the winding trip point frequency f4 to the target frequency f comprises:
under the condition that the target frequency f is greater than the winding dividing point frequency f4, controlling the motor to select a first winding mode, and operating the air conditioning frequency to the winding dividing point frequency f4 under the first winding mode;
after the air-conditioning frequency reaches a winding dividing point frequency f4, controlling the motor to select a second winding mode, and operating the air-conditioning frequency to a target frequency f in the second winding mode;
and inserting an oil return pause platform in the process of operating the air conditioning frequency from the winding dividing point frequency f4 to the target frequency f.
3. The method for controlling the inverter air conditioner according to claim 2, wherein inserting an oil return pause platform in the process of operating the air conditioning frequency from the winding dividing point frequency f4 to the target frequency f comprises:
After the air conditioning frequency reaches a winding division point frequency f4, the air conditioning frequency is operated to a first frequency f1 at a first frequency modulation speed V1, and the air conditioning frequency enters a first oil return stopping platform and lasts for t1 time;
after the first oil return pause platform is finished, the air conditioner runs to a second frequency f2 at a second frequency modulation speed V2, and enters the second oil return pause platform for t2 time;
after the second oil return pause platform is finished, the air conditioner runs to a third frequency f3 at a third frequency modulation speed V3, and enters the third oil return pause platform for t3 time;
after the third oil return pause platform is finished, the air conditioner frequency is operated to the target frequency f at a fourth frequency modulation speed V4;
the motor winding of the air-conditioning compressor is in a first winding mode with high impedance and a second winding mode with low impedance, the frequency of the first oil return pause platform is f1, the frequency of the second oil return pause platform is f2, the frequency of the third oil return pause platform is f3, and f1, f2 and f3 are all larger than f 4.
4. The method of claim 1, further comprising:
correcting the target frequency f according to the windshield of the outdoor fan of the air conditioner, and when the wind speed r of the windshield of the outdoor fan of the air conditioner is less than or equal to r1, negatively correcting the target frequency; when r is larger than r2, the target frequency is corrected in the forward direction;
Wherein r1 and r2 are preset wind speed values.
5. A control device of a variable frequency air conditioner is characterized by comprising:
a calculation module configured to determine a target frequency f of air conditioner operation according to the outdoor ambient temperature Tao;
a determination module configured to determine a relationship between a target frequency f and a winding trip point frequency f 4;
and the control module is configured to determine a motor winding mode and an oil return pause strategy of the air conditioner according to the relation between the target frequency f and the winding dividing point frequency f4, and insert an oil return pause platform in the process that the air conditioner frequency is adjusted to the target frequency f from the winding dividing point frequency f 4.
6. The apparatus of claim 5, further comprising:
the frequency comparison module is configured to compare the operating frequency of the air conditioner compressor with the frequency of the oil return pause platform, obtain a comparison result and send the comparison result to the control module;
the time comparison module is configured to compare the running time of the air conditioner compressor with preset oil return pause time, obtain a comparison result and send the comparison result to the control module;
the control module is also configured to control the motor winding mode and the operating frequency of the air-conditioning compressor according to the comparison result of the frequency comparison module, and then continuously control the operating frequency of the air-conditioning compressor according to the comparison result of the time comparison module.
7. The apparatus of claim 6, further comprising:
the air speed comparison module is configured to compare the wind speed of a windshield of the air conditioner outdoor unit with a preset wind speed, obtain a comparison result and send the comparison result to the control module;
and the control module corrects the target frequency f according to the comparison result of the wind speed comparison module.
8. The apparatus of claim 7, further comprising:
the real-time detection module is configured to detect the operating frequency, the operating time, the wind speed and the outdoor environment temperature of the air conditioner compressor in real time, and detect the outdoor environment temperature and send the operating frequency of the air conditioner compressor to the frequency comparison module, the operating time of the air conditioner compressor to the time comparison module and the wind speed comparison module respectively.
9. The apparatus of claim 5, wherein the control module is further configured to control the motor to select a first winding mode in which the air conditioning frequency is operated to the winding trip frequency f4 if the target frequency f is greater than the winding trip frequency f 4; after the air-conditioning frequency reaches a winding dividing point frequency f4, controlling the motor to select a second winding mode, and operating the air-conditioning frequency to a target frequency f in the second winding mode; and inserting an oil return pause platform in the process of operating the air conditioning frequency from the winding dividing point frequency f4 to the target frequency f.
10. An inverter air conditioner characterized by comprising the apparatus of any one of claims 5 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910345360.8A CN111854084A (en) | 2019-04-26 | 2019-04-26 | Control method and control device of variable frequency air conditioner and variable frequency air conditioner |
| PCT/CN2019/127700 WO2020215771A1 (en) | 2019-04-26 | 2019-12-24 | Variable-frequency air conditioner control method and device, and variable-frequency air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910345360.8A CN111854084A (en) | 2019-04-26 | 2019-04-26 | Control method and control device of variable frequency air conditioner and variable frequency air conditioner |
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| CN111854084A true CN111854084A (en) | 2020-10-30 |
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| WO (1) | WO2020215771A1 (en) |
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| WO2020215771A1 (en) | 2020-10-29 |
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