CN113790507B - Air conditioner and control method of self-adaptive power grid of air conditioner - Google Patents
Air conditioner and control method of self-adaptive power grid of air conditioner Download PDFInfo
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- CN113790507B CN113790507B CN202111114255.7A CN202111114255A CN113790507B CN 113790507 B CN113790507 B CN 113790507B CN 202111114255 A CN202111114255 A CN 202111114255A CN 113790507 B CN113790507 B CN 113790507B
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
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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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
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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
- F24F11/88—Electrical aspects, e.g. circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Abstract
The invention discloses a control method of an air conditioner self-adaptive power grid and the air conditioner, wherein the control method of the air conditioner self-adaptive power grid comprises the following steps: acquiring a preset alternating current bus current value of each set operation stage of the air conditioner in a detection period; controlling the air conditioner to operate in sequence according to set operation stages in the detection period, controlling the air conditioner to operate at a corresponding preset alternating current bus current value in each set operation stage, and acquiring an alternating current bus voltage value of the air conditioner in each set operation stage; and determining the target operation current of the air conditioner according to the alternating-current bus voltage value. The control method can identify the power supply capacity of the power grid, so that the self-adaptive operation of the air conditioner is realized on the basis of considering the power supply capacity of the power grid, and the problem that the air conditioner is unstable in operation and even trips is avoided.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner self-adaptive power grid and an air conditioner.
Background
In the related art, for the control of the air conditioner, the air conditioner controller is only controlled according to the voltage value of the power supply, and cannot accurately judge whether the power supply of the power supply is suitable for the full-function operation of the air conditioner, so that the power supply voltage is easily reduced after the air conditioner is started, the operating power supply environment of the air conditioner is worse, and the problem that the air conditioner is unstable in operation and even trips is caused.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a control method for an adaptive grid of an air conditioner, in which the power supply capability of the grid can be identified by performing adaptive operation of the air conditioner in a staged manner, so as to realize safe operation of the air conditioner while considering the power supply capability of the grid, and avoid the problem of unstable operation of the air conditioner and even trip of the air conditioner.
The second objective of the present invention is to provide an air conditioner.
The invention also provides an air conditioner.
In order to solve the above problem, an embodiment of a first aspect of the present invention provides a method for controlling an adaptive power grid of an air conditioner, including: acquiring a preset alternating current bus current value of each set operation stage of the air conditioner in a detection period; controlling the air conditioner to operate in sequence according to set operation stages in the detection period, controlling the air conditioner to operate at a corresponding preset alternating current bus current value in each set operation stage, and acquiring an alternating current bus voltage value of the air conditioner in each set operation stage; and determining the target operation current of the air conditioner according to the alternating-current bus voltage value.
According to the control method of the self-adaptive power grid of the air conditioner, based on the preset alternating current bus current value of each set operation stage in the detection period, after the air conditioner is started, the air conditioner is controlled to carry out self-adaptive operation in sequence according to the set operation stages in the detection period by using the preset alternating current bus current value corresponding to each set operation stage, and obtains the AC bus voltage value corresponding to the set operation stage, so as to identify the power supply capacity of the power grid according to the variation condition of the AC bus voltage value, then the air conditioner matches the operation parameter which is the target operation current and accords with the power supply capacity of the power grid on the basis of considering the power supply capacity of the power grid, therefore, the air conditioner is controlled to operate by the target operation current in the application process, the air conditioner can be kept in a safe operation state, and the problem that the air conditioner is unstable in operation and even trips is avoided.
In some embodiments, the set operation phase in the detection period includes a standby phase and a start phase, and the controlling the air conditioner to sequentially operate according to the set operation phase in the detection period includes: in the standby stage, controlling the air conditioner to operate at a first preset alternating current bus current value, wherein the first preset alternating current bus current value is zero, and acquiring a corresponding alternating current bus voltage value as a first alternating current bus voltage value; and controlling the air conditioner to start, and in the starting stage, controlling the air conditioner to operate at a second preset alternating current bus current value, and acquiring a corresponding alternating current bus voltage value as a second alternating current bus voltage value, wherein the second preset alternating current bus current value is larger than the first preset alternating current bus current value.
In some embodiments, the set operation stages in the detection period further include an up-conversion stage, a down-conversion stage and a shutdown stage, the air conditioner is controlled to sequentially operate according to the set operation stages in the detection period, and the method further includes: controlling the air conditioner to run at a third preset alternating current bus current value in the frequency increasing stage, and acquiring a corresponding alternating current bus voltage value as a third alternating current bus voltage value, wherein the third preset alternating current bus current value is larger than the second preset alternating current bus current value; controlling the air conditioner to operate at a second preset alternating current bus current value and acquiring a corresponding alternating current bus voltage value as a fourth alternating current bus voltage value in the frequency reduction stage; and after the frequency reduction stage is finished, controlling the air conditioner to enter the shutdown stage, and acquiring a corresponding alternating current bus voltage value as a fifth alternating current bus voltage value.
In some embodiments, determining a target operating current of the air conditioner based on the ac bus voltage value includes: calculating a difference between the third ac bus voltage value and the second ac bus voltage value to obtain a first voltage difference value, and calculating a difference between the third ac bus voltage value and the first ac bus voltage value to obtain a second voltage difference value; and determining the target operation current of the air conditioner according to the first voltage difference value and the second voltage difference value.
In some embodiments, determining the target operating current of the air conditioner according to the first voltage difference value and the second voltage difference value includes: when the first voltage difference value is smaller than a first preset voltage difference threshold value and the second voltage difference value is smaller than a second preset voltage difference threshold value, determining that the target running current is a maximum allowable running current value; when the first voltage difference value is greater than the first preset voltage difference threshold and less than a third preset voltage difference threshold and the second voltage difference value is greater than the second preset voltage difference threshold and less than a fourth preset voltage difference threshold, determining that the target operation current is a first operation current value, wherein the first operation current value is less than the maximum allowable operation current value, the third preset voltage difference threshold is greater than the first preset voltage difference threshold, and the fourth preset voltage difference threshold is greater than the second preset voltage difference threshold.
In some embodiments, determining the target operating current of the air conditioner according to the first voltage difference value and the second voltage difference value includes: when the first voltage difference value is greater than the third preset voltage difference threshold and less than a fifth preset voltage difference threshold and the second voltage difference value is greater than the fourth preset voltage difference threshold and less than a sixth preset voltage difference threshold, determining that the target operating current is a second operating current value, wherein the second operating current value is less than the first operating current value, the fifth preset voltage difference threshold is greater than the third preset voltage difference threshold, and the sixth preset voltage difference threshold is greater than the fourth preset voltage difference threshold; when the first voltage difference value is greater than a fifth preset voltage difference threshold value and the second voltage difference value is greater than a sixth preset voltage difference threshold value, determining that the target operation current is a third operation current value, wherein the third operation current value is less than the second operation current value.
In some embodiments, before determining the target operating current of the air conditioner according to the ac bus voltage value, the control method further includes: and determining to execute a trigger mode for determining the target running current of the air conditioner according to the first alternating-current bus voltage value, the second alternating-current bus voltage value, the fourth alternating-current bus voltage value and the fifth alternating-current bus voltage value.
In some embodiments, the triggering mode includes a direct triggering mode and a forced triggering mode, and determining the triggering mode for executing the determination of the target operating current of the air conditioner according to the ac bus voltage value according to the first ac bus voltage value, the second ac bus voltage value, the fourth ac bus voltage value and the fifth ac bus voltage value includes: calculating a difference between the first ac bus voltage value and the fifth ac bus voltage value to obtain a third voltage difference value, and calculating a difference between the second ac bus voltage value and the fourth ac bus voltage value to obtain a fourth voltage difference value; when the third voltage difference value is smaller than or equal to a seventh preset voltage difference value threshold and the fourth voltage difference value is smaller than or equal to an eighth preset voltage difference value threshold, determining that the trigger mode is a direct trigger mode, and directly determining the target running current of the air conditioner according to the alternating current bus voltage value;
when the third voltage difference value is greater than the seventh preset voltage difference value threshold or the fourth voltage difference value is greater than the eighth preset voltage difference value threshold, determining that the trigger mode is a forced trigger mode; under the forced trigger mode, controlling the air conditioner to repeatedly run for a detection period and judging whether the third voltage difference value and the fourth voltage difference value meet a direct trigger condition or not; recording the number of times that the air conditioner repeatedly operates in the detection period, and if the number of times reaches a preset number of times and the third voltage difference value and the fourth voltage difference value do not meet the direct trigger condition, forcibly determining the target operation current of the air conditioner according to the alternating current bus voltage value; and if the times are within preset times, and the third voltage difference value and the fourth voltage difference value meet the direct trigger condition, directly determining the target running current of the air conditioner according to the alternating-current bus voltage value.
In a second aspect, an embodiment of the present invention provides an air conditioner, including: at least one processor; a memory communicatively coupled to at least one of the processors; the memory stores a computer program executable by at least one of the processors, and the at least one of the processors implements the method for controlling the adaptive power grid of the air conditioner according to the above embodiment when executing the computer program.
According to the air conditioner provided by the embodiment of the invention, the processor executes the control method of the air conditioner adaptive power grid provided by the embodiment, the air conditioner is controlled to perform adaptive operation in a staged mode, and the power supply capacity of the power grid can be identified, so that the safe operation of the air conditioner is realized on the basis of considering the power supply capacity of the power grid, and the problem that the air conditioner is unstable in operation and even trips is avoided.
In a third aspect, an embodiment of the present invention provides an air conditioner, including: the power factor correction module is connected with the rectification module; the voltage detection module is used for detecting the voltage of the alternating-current bus; the alternating current bus current detection module is used for detecting current; and the control module is respectively connected with the power factor correction module, the voltage detection module and the current detection module and is used for executing the control method of the air conditioner self-adaptive power grid in the embodiment.
According to the air conditioner provided by the embodiment of the invention, the control module executes the control method of the air conditioner adaptive power grid provided by the embodiment, the air conditioner is controlled to perform adaptive operation in a staged mode, and the power supply capacity of the power grid can be identified, so that the safe operation of the air conditioner is realized on the basis of considering the power supply capacity of the power grid, and the problem that the air conditioner is unstable in operation and even trips is avoided.
A fourth aspect of the present invention provides a non-transitory computer storage medium, on which a computer program is stored, the computer program implementing the control method for an air conditioner adaptive grid according to the above embodiments when executed.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a control method of an adaptive grid of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating a change in a voltage value of an ac bus when an air conditioner is sequentially operated according to a set operation stage within a detection period according to an embodiment of the present invention;
fig. 3 is a block diagram of an air conditioner according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of an air conditioner according to an embodiment of the present invention.
Reference numerals:
an air conditioner 10;
a processor 11; a memory 12;
a rectification module 1; a power factor correction module 2; a voltage detection module 3; a current detection module 4; and a control module 5.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
The air conditioner performs functions such as refrigeration/heating circulation or dehumidification through the compressor, the condenser, the expansion valve and the evaporator, can realize the regulation of indoor environment, and improves the comfort of the indoor environment. The refrigeration cycle includes a series of processes, for example, involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the ambient environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the environment of the indoor space throughout the cycle.
In the related technology, the air conditioner can be controlled only according to the voltage value of the power grid, self-diagnosis of the power grid is lacked, the difference of the power supply capacity of the power grid cannot be identified, self-adaptive operation cannot be performed according to the characteristics of the power grid, and a proper operation state cannot be intelligently selected, so that the power supply voltage is easily pulled down after the air conditioner is started, the operation power supply environment of the air conditioner is worse, and the problem that the air conditioner is unstable in operation and even jumps is caused.
In order to solve the above problems, an embodiment of a first aspect of the present invention provides a method for controlling an adaptive power grid of an air conditioner, in which a power supply capability of the power grid can be identified by performing adaptive operation of the air conditioner in a staged manner, so that safe operation of the air conditioner is realized on the basis of considering the power supply capability of the power grid, and the problem of unstable operation of the air conditioner and even trip of the air conditioner is avoided.
The control method of the adaptive power grid of the air conditioner according to the embodiment of the present invention is described below with reference to fig. 1, and as shown in fig. 1, the control method includes at least steps S1 to S3.
And step S1, acquiring the preset alternating current bus current value of each set operation stage of the air conditioner in the detection period.
The detection period can be understood as a detection process for detecting the power supply capacity of the power grid, so as to diagnose the characteristics of the power grid. The preset current value of the alternating current bus is a preset current value of the operation of the whole air conditioner, and can be preset according to actual conditions without limitation. The detection period may include a plurality of preset operation stages, and each preset operation stage is provided with a preset ac bus current value correspondingly, that is, the preset operation stages and the preset ac bus current values are in a one-to-one correspondence relationship.
Specifically, a detection period is set in the air conditioner, and the power supply capacity of the power grid is judged according to the running condition in the detection period by performing self-adaptive running in the detection period, so that the running parameters of the subsequent air conditioner can be adjusted in a self-adaptive manner during normal application, the air conditioner is controlled according to the running parameters suitable for the power supply capacity of the power grid, and the safe running of the air conditioner is maintained.
In the embodiment, each time the air conditioner is started and powered on, the air conditioner executes a control method of the air conditioner adaptive power grid, namely, the air conditioner performs adaptive operation in a detection period to identify the power supply capacity of the power grid, and determines the operation state adaptive to the current power supply capacity of the power grid according to the power supply capacity of the power grid, so that the safe operation of the air conditioner is maintained.
And step S2, controlling the air conditioner to operate in sequence according to the set operation stages in the detection period, controlling the air conditioner to operate at the corresponding preset alternating current bus current value in each set operation stage, and acquiring the alternating current bus voltage value of the air conditioner in each set operation stage.
Specifically, after the air conditioner is powered on, the air conditioner sequentially operates in a staged mode according to a preset alternating current bus current value corresponding to each set operation stage, and an alternating current bus voltage value of the air conditioner at each set operation stage is obtained.
For example, the detection cycle includes three set operation stages, which are: a first set operation stage, a second set operation stage and a third set operation stage; the preset alternating current bus current value corresponding to each set operation stage is respectively as follows: i11, I12 and I13. Specifically, after the air conditioner is started and powered on, the air conditioner is controlled to enter a first set operation stage, the current of the whole air conditioner is controlled to operate at I11, and the voltage value of an alternating current bus of the first set operation stage is recorded; when the first set operation stage reaches the preset duration, controlling the air conditioner to enter a second set operation stage from the first set operation stage, simultaneously controlling the current of the whole air conditioner to operate at I12, and recording the voltage value of the alternating current bus of the second set operation stage; and when the second set operation stage reaches the preset time length, controlling the air conditioner to enter a third set operation stage from the second set operation stage, simultaneously controlling the current of the whole air conditioner to operate at I13, recording the voltage value of the alternating current bus of the third set operation stage, completing self-adaptive operation of the air conditioner in a detection period after the third set operation stage reaches the preset time length, and further performing self-diagnosis on the power grid according to the change condition of the voltage value of the alternating current bus during operation of each set operation stage so as to identify the power supply capacity of the power grid.
And step S3, determining the target operation current of the air conditioner according to the alternating current bus voltage value.
The target operating current can be understood as a current value which accords with the safe operation of the air conditioner under the condition of the current power supply capacity of the power grid.
Specifically, the air conditioner judges the power supply capacity of the power grid according to the change situation of the voltage value of the alternating-current bus, and then matches the operation parameter, namely the target operation current, which accords with the power supply capacity of the power grid on the basis of considering the power supply capacity of the power grid, so that the air conditioner is controlled to operate by the target operation current in the application process, the air conditioner can be enabled to maintain the state of safe operation, and the problem that the air conditioner is unstable in operation and even trips is avoided.
According to the control method of the air conditioner self-adaptive power grid, based on the preset alternating current bus current value of each set operation stage in the detection period, after the air conditioner is started, the air conditioner is controlled to sequentially operate according to the set operation stages in the detection period through the preset alternating current bus current value corresponding to each set operation stage, and the alternating current bus voltage value corresponding to the set operation stage is obtained, so that the power supply capacity of the power grid can be identified according to the change situation of the alternating current bus voltage value, and then the air conditioner matches the operation parameter, namely the target operation current, which accords with the power supply capacity of the power grid on the basis of considering the power supply capacity of the power grid.
In an embodiment, the set operation stages in the detection period include a standby stage, a start-up stage, a frequency-down stage, and a shutdown stage, and the following describes controlling the air conditioner to operate in sequence according to the set operation stages in the detection period.
Specifically, in the standby phase, the air conditioner is controlled to operate at a first preset ac bus current value I1, the first preset ac bus current value I1 is zero, and the corresponding ac bus voltage value is obtained as a first ac bus voltage value V1, for example, as shown in fig. 2, I1 is 0 in the standby phase.
And controlling the air conditioner to start, and in a starting stage, controlling the air conditioner to operate at a second preset alternating current bus current value I2, and acquiring that a corresponding alternating current bus voltage value is a second alternating current bus voltage value V2, wherein the second preset alternating current bus current value I2 is greater than the first preset alternating current bus current value I1, for example, as shown in fig. 2, after entering the starting stage from a standby stage, the operating current of the whole air conditioner is controlled to increase, and gradually increases from I1 to I2 when I1 is 0. I2 may be set with the maximum allowable operation current value Imax of the air conditioner as a reference, for example, I2 is 25% Imax.
After the starting stage is finished, controlling the air conditioner to perform frequency-up operation, and in the frequency-up stage, controlling the air conditioner to perform operation at a third preset alternating current bus current value I3, and acquiring that the corresponding alternating current bus voltage value is a third alternating current bus voltage value V3, where the third preset alternating current bus current value I3 is greater than the second preset alternating current bus current value I2, for example, as shown in fig. 2, after the starting stage enters the frequency-up stage, the operation current of the whole air conditioner is controlled to continue to increase, and gradually increases from I2 to I3. I3 may be set with the maximum allowable operating current value Imax of the air conditioner as a reference, and I3 is 50% Imax.
And controlling the air conditioner to operate in a frequency reduction mode after the frequency increasing stage is finished, and controlling the air conditioner to operate in a second preset alternating current bus current value I2 and obtain a corresponding alternating current bus voltage value as a fourth alternating current bus voltage value V4 in the frequency reduction stage, for example, as shown in fig. 2, after the frequency increasing stage enters the frequency reduction stage, the operating current of the whole air conditioner is controlled to be reduced, and the operating current is gradually reduced to I2 from I3.
After the down-conversion phase is finished, the air conditioner is controlled to enter the shutdown phase, and the corresponding ac bus voltage value is obtained as a fifth ac bus voltage value V5, for example, as shown in fig. 2, after the down-conversion phase enters the shutdown phase, the operating current of the whole air conditioner is controlled to continue to decrease, and gradually decreases from I2 to I1 being 0.
Therefore, the compressor of the air conditioner is controlled to pass through the self-adaptive operation process of standby-start-frequency reduction-frequency increase-stop to obtain the alternating current bus voltage value of each set operation stage, so that the power supply capacity of the power grid can be judged according to the change situation of the alternating current bus voltage value of each set operation stage, the air conditioner operation parameter, namely the target operation current, conforming to the power supply capacity of the power grid is matched on the basis of considering the power supply capacity of the power grid, and the safe operation of the air conditioner is maintained.
In some embodiments, the difference between the third ac bus voltage value V3 and the second ac bus voltage value V2 is calculated to obtain a first voltage difference value Δ V1, and the difference between the third ac bus voltage value V3 and the first ac bus voltage value V1 is calculated to obtain a second voltage difference value Δ V2, the power supply capacity of the power grid is determined according to the first voltage difference value Δ V1 and the second voltage difference value Δ V2, and an operating parameter meeting the power supply capacity of the power grid, that is, a target operating current, is matched on the basis of considering the power supply capacity of the power grid, so that the air conditioner is controlled to operate at the target operating current in an application process, the air conditioner can be maintained in a safe operation state, and the problem that the air conditioner is unstable in operation and even trips is avoided.
It is understood that the larger the voltage difference, the worse the power supply capability of the grid.
In some embodiments, when the first voltage difference value Δ V1 is smaller than the first preset voltage difference threshold Vj1 and the second voltage difference value Δ V2 is smaller than the second preset voltage difference threshold Vj2, it indicates that the third ac bus voltage value V3 is approximately equal to the second ac bus voltage value V2 and the third ac bus voltage value V3 is approximately equal to the first ac bus voltage value V1, and the power supply capacity of the power grid is sufficient and suitable for a full-capacity operation of the air conditioner, so that the target operation current is determined to be the maximum allowable operation current value Imax, and the air conditioner is controlled to operate at the maximum allowable operation current value Imax in a normal application.
Or, when the first voltage difference value Δ V1 is greater than the first preset voltage difference threshold Vj1 and less than the third preset voltage difference threshold Vj3 and the second voltage difference value Δ V2 is greater than the second preset voltage difference threshold Vj2 and less than the fourth preset voltage difference threshold Vj4, it indicates that the power supply capacity of the current power grid is sufficient and the air conditioner is barely suitable for full-capacity operation of the air conditioner, and therefore, the target operation current is determined to be the first operation current value I01, and the first operation current value I01 is less than the maximum allowable operation current value Imax, and if I01 is 75% × Imax, that is, the situation that the power grid voltage is pulled down after the air conditioner is started is avoided, the air conditioner is controlled to reduce the operation current of the whole machine during normal application, so that the air conditioner is operated at the first operation current value I01, so that the operation state of the air conditioner conforms to the current power grid environment, and the safe operation of the air conditioner is maintained.
The third preset voltage difference threshold Vj3 is greater than the first preset voltage difference threshold Vj1, and the fourth preset voltage difference threshold Vj4 is greater than the second preset voltage difference threshold Vj 2.
Or, when the first voltage difference value Δ V1 is greater than the third preset voltage difference threshold Vj3 and less than the fifth preset voltage difference threshold Vj5 and the second voltage difference value Δ V2 is greater than the fourth preset voltage difference threshold Vj4 and less than the sixth preset voltage difference threshold Vj6, it is determined that the power supply capacity of the current power grid is insufficient, and therefore it is determined that the target operation current is the second operation current value I02 and the second operation current value I02 is less than the first operation current value I01, that is, the situation that the power grid voltage is pulled down after the air conditioner is started is avoided, the air conditioner is controlled to reduce the operation current of the whole air conditioner during normal application, so that the air conditioner operates at the first operation current value I01, the operation state of the air conditioner conforms to the current power grid environment, and the safe operation of the air conditioner is maintained. I02 may be set with reference to the maximum allowable operating current value Imax of the air conditioner, and I02 is 50% Imax.
Wherein, the fifth preset voltage difference threshold Vj5 is greater than the third preset voltage difference threshold Vj3, and the sixth preset voltage difference threshold Vj6 is greater than the fourth preset voltage difference threshold Vj 4.
Or, when the first voltage difference value Δ V1 is greater than the fifth preset voltage difference threshold Vj5 and the second voltage difference value Δ V2 is greater than the sixth preset voltage difference threshold Vj6, it indicates that the power supply capability of the current power grid is poor, and therefore, it is determined that the target operation current is the third operation current value I03 and the third operation current value I03 is less than the second operation current value I02, which is a situation that the power grid voltage is pulled down after the air conditioner is started, and the operation current of the whole air conditioner is reduced during normal application, so that the air conditioner operates at the first operation current value I01, so that the operation state of the air conditioner conforms to the current power grid environment, and the safe operation of the air conditioner is maintained. I03 may be set with the maximum allowable operating current value Imax of the air conditioner as a reference, and I03 is 30% Imax.
The following describes an example of a control method of an adaptive power grid of an air conditioner according to an embodiment of the present invention with reference to fig. 2, and the following details are provided.
Suppose that the preset values of the air conditioner are respectively: imax 10A, I1 0, I2 2.5A, I3 5A, I01 7.5A, I02 5A, I03 3A, Vj1 3V, Vj2 5V, Vj3 5V, Vj4 10V, Vj5 8V, and Vj6 20V. Based on the preset value, before the air conditioner is started, the air conditioner is in a standby stage, and a first alternating-current bus voltage value V1 at the stage is read to be 220V; starting a compressor of the air conditioner, controlling the current of the whole air conditioner to operate at I2-2.5A, and reading a second alternating current bus voltage value V2-207V at the starting stage; after the starting stage reaches a preset duration, continuously increasing the rotation speed of the compressor, controlling the current of the whole machine to operate at the condition that I3 is equal to 5A, and reading a third alternating current bus voltage value V3 of the frequency increasing stage to be equal to 190V; after the frequency increasing stage reaches a preset duration, reducing the rotating speed of the compressor, controlling the current of the whole machine to operate at I2-2.5A, and reading a fourth alternating current bus voltage value V3-208V in the frequency reducing stage; and after the frequency reduction stage reaches a preset time length, stopping running the compressor, controlling the current running of the whole machine until I1 is equal to 0, and reading a fifth alternating current bus voltage value V3 of the shutdown stage to be equal to 222V. Further, the controller of the air conditioner calculates a difference V2 between the third ac bus voltage value V3 and the second ac bus voltage value to obtain a first voltage difference Δ V1-V2-V3-17V, and calculating a difference V1 of the third ac bus voltage value V3 from the first ac bus voltage value to obtain a second voltage difference Δ V2-V1-V3-30V, and determining that the delta V1 is more than Vj5 and the delta V2 is more than Vj6, at this time, the power supply capacity of the current power grid is poor, therefore, in order to avoid the situation that the grid voltage is pulled down after the air conditioner is started, the target operation current is determined to be the third operation current value I03-3A, namely, the running current of the whole air conditioner runs at the third running current value I03 when the air conditioner is in normal application, the running state of the air conditioner is in accordance with the current power grid environment, the safe running of the air conditioner is maintained, and the problems that the air conditioner runs unstably and even trips are avoided.
In some embodiments, in order to avoid the problem that when the air conditioner is controlled to operate sequentially according to the set operation stage in the detection period, the power supply provided by the power grid changes, so that the detected ac bus voltage value is inaccurate, and therefore the power supply capability of the power grid identified by the air conditioner is unreliable, according to the method of the embodiments of the present invention, before the target operation current of the air conditioner is determined according to the ac bus voltage value, the reliability of the identified power supply capability of the power grid is further determined according to the first ac bus voltage value V1, the second ac bus voltage value V2, the fourth ac bus voltage value V4, and the fifth ac bus voltage value V5, so as to determine to execute a trigger mode for determining the target operation current of the air conditioner according to the ac bus voltage value, and to improve the reliability of the identification of the power supply capability of the power grid.
In some embodiments, the trigger mode includes a direct trigger mode and a forced trigger mode. Obtaining a third voltage difference Δ V3 by calculating a difference between the first ac bus voltage value V1 and the fifth ac bus voltage value V5, and obtaining a fourth voltage difference Δ V4 by calculating a difference between the second ac bus voltage value V2 and the fourth ac bus voltage value V4; when the third voltage difference Δ V3 is less than or equal to the seventh preset voltage difference threshold Vj7 and the fourth voltage difference Δ V4 is less than or equal to the eighth preset voltage difference threshold Vj8, it indicates that the power provided by the power grid is reliable when the air conditioner is controlled to operate in the detection period, and therefore the trigger mode is determined to be the direct trigger mode, that is, the target operation current of the air conditioner is directly determined according to the ac bus voltage value.
Or, when the third voltage difference Δ V3 is greater than the seventh preset voltage difference threshold Vj7 or the fourth voltage difference Δ V4 is greater than the eighth preset voltage difference threshold Vj8, it indicates that the power provided by the power grid when the air conditioner is controlled to operate in the detection period is unreliable, and thus the trigger mode is determined to be the forced trigger mode; under the forced triggering mode, controlling the air conditioner to repeatedly run for a detection period and judging whether a third voltage difference value delta V3 and a fourth voltage difference value delta V4 meet a direct triggering condition or not; recording the times of the air conditioner repeated operation detection period, and if the times reach preset times and the third voltage difference value delta V3 and the fourth voltage difference value delta V4 do not meet the direct trigger condition, forcibly determining the target operation current of the air conditioner according to the voltage value of the alternating-current bus; and if the times are within the preset times, and the third voltage difference value delta V3 and the fourth voltage difference value delta V4 meet the direct triggering condition, directly determining the target running current of the air conditioner according to the voltage value of the alternating current bus.
For example, assuming that the preset number of times is 3, the air conditioner sequentially operates in a staged manner by using a preset alternating current bus current value corresponding to each set operation stage, and after the alternating current bus voltage value of the air conditioner in each set operation stage is obtained, if it is determined that Δ V3 is not less than Vj7 and Δ V4 is not less than Vj8, V1 is about V5 and V2 is about V4, that is, the power supply provided by the power grid when the air conditioner is controlled to operate in the detection period is reliable, so that the target operation current of the air conditioner is directly determined according to the alternating current bus voltage value; on the contrary, if Δ V3> Vj7 and/or Δ V4> Vj8 are determined, it is indicated that V1 ≠ V5 and V2 ≠ V4, that is, this time, the power provided by the power grid when the air conditioner is controlled to operate in the detection period is unreliable, the air conditioner is controlled to repeatedly operate in sequence according to the set operation stage in the detection period, and whether the third voltage difference Δ V3 and the fourth voltage difference Δ V4 after each operation meet the direct trigger condition is determined, that is, whether Δ V3 is not more than Vj7 and Δ V4 is not more than Vj8 are determined, in this process, the number of times of the air conditioner repeated operation detection period is also recorded, and if the number of times is not more than 3, Δ V3 is not more than j V7 and Δ V4 is not more than Vj8, the determination of the target operation current of the air conditioner is directly performed according to the ac voltage value; if the times are 3, the direct trigger conditions that the delta V3 is not more than or equal to the Vj7 and the delta V4 is not more than or equal to the Vj8 are not met, the air conditioner is not continuously controlled to repeatedly and sequentially operate according to the set operation stage in the detection period, and the target operation current of the air conditioner is determined according to the alternating-current bus voltage value in a forced mode. Therefore, the control mode can avoid the problem that the detected alternating current bus voltage value is inaccurate due to the fact that the power supply provided by the power grid is changed when the air conditioner is controlled to operate in sequence according to the set operation stage in the detection period, so that the power supply capacity of the power grid identified by the air conditioner is unreliable, can forcibly perform subsequent operation after direct trigger conditions are not met for many times, and cannot influence the normal operation of the air conditioner.
In a second embodiment of the present invention, an air conditioner is provided, as shown in fig. 3, the air conditioner 10 includes at least one processor 11 and a memory 12 communicatively connected to the at least one processor 11.
The memory 12 stores a computer program executable by the at least one processor 11, and the at least one processor 11 implements the method for controlling the adaptive power grid of the air conditioner according to the above-mentioned embodiment when executing the computer program.
It should be noted that the specific implementation manner of the air conditioner 10 according to the embodiment of the present invention is similar to the specific implementation manner of the control method of the air conditioner adaptive grid according to any of the above embodiments of the present invention, and please refer to the description of the method part specifically, and details are not described here again in order to reduce redundancy.
According to the air conditioner 10 of the embodiment of the invention, the processor 11 executes the control method of the air conditioner adaptive power grid provided by the above embodiment, the air conditioner 10 is controlled to perform adaptive operation in a staged manner, and the power supply capacity of the power grid can be identified, so that the safe operation of the air conditioner is realized on the basis of considering the power supply capacity of the power grid, and the problem that the operation of the air conditioner is unstable and even the air conditioner jumps is avoided.
In an embodiment of the third aspect of the present invention, an air conditioner 10 includes, as shown in fig. 4, a rectifying module 1, a power factor correcting module 2, a voltage detecting module 3, a current detecting module 4, and a control module 5.
The power factor correction module 2 is connected with the rectification module 1; the voltage detection module 3 is used for detecting the voltage of the alternating current bus; the current detection module 4 is used for detecting the alternating current bus current; the control module 5 is connected to the power factor correction module 2, the voltage detection module 3, and the current detection module 4, respectively, and is configured to execute the control method for the adaptive power grid of the air conditioner provided in the foregoing embodiment.
In the embodiment, the alternating current bus voltage detection module 3 and the alternating current bus current detection module 4 respectively convert the detected alternating current bus voltage and alternating current bus current into digital signals and send the digital signals to the control module 5, so that the control module 5 controls the air conditioner 10 to perform self-adaptive operation in a staged manner according to the detected alternating current bus voltage and alternating current bus current by using the control method of the air conditioner self-adaptive power grid provided by the embodiment, and the power supply capacity of the power grid can be identified, thereby realizing the safe operation of the air conditioner on the basis of considering the power supply capacity of the power grid, and avoiding the problem that the air conditioner is unstable in operation and even trips.
It should be noted that the specific implementation manner of the air conditioner 10 according to the embodiment of the present invention is similar to the specific implementation manner of the control method of the air conditioner adaptive grid according to any of the above embodiments of the present invention, and please refer to the description of the method part specifically, and details are not described here again in order to reduce redundancy.
According to the air conditioner 10 of the embodiment of the invention, the control module 5 executes the control method of the air conditioner adaptive power grid provided by the embodiment, the air conditioner 10 is controlled to perform adaptive operation in a staged mode, and the power supply capacity of the power grid can be identified, so that the safe operation of the air conditioner is realized on the basis of considering the power supply capacity of the power grid, and the problem that the operation of the air conditioner is unstable and even the air conditioner jumps is avoided.
A fourth aspect of the present invention provides a non-transitory computer storage medium, on which a computer program is stored, and the computer program is executed to implement the method for controlling an adaptive grid of an air conditioner provided in the foregoing embodiments.
In the description of this specification, any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of custom logic functions or processes, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A control method of an adaptive power grid of an air conditioner is characterized by comprising the following steps:
acquiring a preset alternating current bus current value of each set operation stage of the air conditioner in a detection period;
controlling the air conditioner to operate in sequence according to set operation stages in the detection period, controlling the air conditioner to operate at a corresponding preset alternating current bus current value in each set operation stage, and acquiring an alternating current bus voltage value of the air conditioner in each set operation stage;
and determining the target operation current of the air conditioner according to the alternating-current bus voltage value.
2. The method for controlling the adaptive power grid of the air conditioner according to claim 1, wherein the set operation stages in the detection period comprise a standby stage and a starting stage, and the step of controlling the air conditioner to sequentially operate according to the set operation stages in the detection period comprises the steps of:
in the standby stage, controlling the air conditioner to operate at a first preset alternating current bus current value, wherein the first preset alternating current bus current value is zero, and acquiring a corresponding alternating current bus voltage value as a first alternating current bus voltage value;
and controlling the air conditioner to start, and in the starting stage, controlling the air conditioner to operate at a second preset alternating current bus current value, and acquiring a corresponding alternating current bus voltage value as a second alternating current bus voltage value, wherein the second preset alternating current bus current value is larger than the first preset alternating current bus current value.
3. The method for controlling the adaptive power grid of the air conditioner according to claim 2, wherein the set operation stages in the detection period further include an up-conversion stage, a down-conversion stage and a shutdown stage, and the air conditioner is controlled to operate in sequence according to the set operation stages in the detection period, further comprising:
controlling the air conditioner to run at a third preset alternating current bus current value in the frequency increasing stage, and acquiring a corresponding alternating current bus voltage value as a third alternating current bus voltage value, wherein the third preset alternating current bus current value is larger than the second preset alternating current bus current value;
controlling the air conditioner to operate in a frequency reduction mode after the frequency increasing stage is finished, and controlling the air conditioner to operate at the second preset alternating current bus current value in the frequency reduction stage and acquiring a corresponding alternating current bus voltage value as a fourth alternating current bus voltage value;
and after the frequency reduction stage is finished, controlling the air conditioner to enter the shutdown stage, and acquiring a corresponding alternating current bus voltage value as a fifth alternating current bus voltage value.
4. The method for controlling the adaptive grid of the air conditioner according to claim 3, wherein determining the target operation current of the air conditioner according to the value of the AC bus voltage comprises:
calculating a difference between the third ac bus voltage value and the second ac bus voltage value to obtain a first voltage difference value, and calculating a difference between the third ac bus voltage value and the first ac bus voltage value to obtain a second voltage difference value;
and determining the target operation current of the air conditioner according to the first voltage difference value and the second voltage difference value.
5. The method of claim 4, wherein determining the target operating current of the air conditioner based on the first voltage difference value and the second voltage difference value comprises:
when the first voltage difference value is smaller than a first preset voltage difference threshold value and the second voltage difference value is smaller than a second preset voltage difference threshold value, determining that the target running current is a maximum allowable running current value;
when the first voltage difference value is greater than the first preset voltage difference threshold and less than a third preset voltage difference threshold and the second voltage difference value is greater than the second preset voltage difference threshold and less than a fourth preset voltage difference threshold, determining that the target operation current is a first operation current value, wherein the first operation current value is less than the maximum allowable operation current value, the third preset voltage difference threshold is greater than the first preset voltage difference threshold, and the fourth preset voltage difference threshold is greater than the second preset voltage difference threshold.
6. The method of claim 5, wherein determining a target operating current for the air conditioner based on the first voltage difference and the second voltage difference comprises:
when the first voltage difference value is greater than the third preset voltage difference threshold and less than a fifth preset voltage difference threshold and the second voltage difference value is greater than the fourth preset voltage difference threshold and less than a sixth preset voltage difference threshold, determining that the target operating current is a second operating current value, wherein the second operating current value is less than the first operating current value, the fifth preset voltage difference threshold is greater than the third preset voltage difference threshold, and the sixth preset voltage difference threshold is greater than the fourth preset voltage difference threshold;
when the first voltage difference value is greater than a fifth preset voltage difference threshold value and the second voltage difference value is greater than a sixth preset voltage difference threshold value, determining that the target operation current is a third operation current value, wherein the third operation current value is less than the second operation current value.
7. The method of claim 3, wherein prior to determining the target operating current of the air conditioner based on the AC bus voltage value, the method further comprises:
and determining to execute a trigger mode for determining the target running current of the air conditioner according to the first alternating-current bus voltage value, the second alternating-current bus voltage value, the fourth alternating-current bus voltage value and the fifth alternating-current bus voltage value.
8. The method of controlling an adaptive grid for air conditioners according to claim 7, wherein the trigger modes include a direct trigger mode and a forced trigger mode, and the trigger mode for performing the determination of the target operating current of the air conditioner according to the ac bus voltage value is determined according to the first ac bus voltage value, the second ac bus voltage value, the fourth ac bus voltage value and the fifth ac bus voltage value includes:
calculating a difference between the first ac bus voltage value and the fifth ac bus voltage value to obtain a third voltage difference value, and calculating a difference between the second ac bus voltage value and the fourth ac bus voltage value to obtain a fourth voltage difference value;
when the third voltage difference value is smaller than or equal to a seventh preset voltage difference value threshold and the fourth voltage difference value is smaller than or equal to an eighth preset voltage difference value threshold, determining that the trigger mode is a direct trigger mode, and directly determining the target running current of the air conditioner according to the alternating current bus voltage value;
when the third voltage difference is greater than the seventh preset voltage difference threshold or the fourth voltage difference is greater than the eighth preset voltage difference threshold, determining that the trigger mode is a forced trigger mode;
under the forced trigger mode, controlling the air conditioner to repeatedly run for a detection period and judging whether the third voltage difference value and the fourth voltage difference value meet a direct trigger condition or not;
recording the number of times of the air conditioner repeatedly operating the detection cycle, and if the number of times reaches a preset number of times and the third voltage difference value and the fourth voltage difference value do not meet the direct trigger condition, forcibly executing to determine a target operating current of the air conditioner according to the voltage value of the alternating current bus;
and if the times are within preset times, and the third voltage difference value and the fourth voltage difference value meet the direct trigger condition, directly determining the target running current of the air conditioner according to the alternating-current bus voltage value.
9. An air conditioner, comprising:
at least one processor;
a memory communicatively coupled to at least one of the processors;
wherein the memory stores a computer program executable by at least one processor, and the at least one processor implements the method for controlling the adaptive grid of the air conditioner according to any one of claims 1 to 8 when executing the computer program.
10. An air conditioner, comprising:
the power factor correction module is connected with the rectification module;
the voltage detection module is used for detecting the voltage of the alternating current bus;
the current detection module is used for detecting the current of the alternating current bus;
a control module, connected to the power factor correction module, the voltage detection module and the current detection module respectively, for executing the control method of the air conditioner adaptive power grid according to any one of claims 1 to 8.
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