WO2020107824A1 - 运行控制方法及系统、压缩机和空调器 - Google Patents
运行控制方法及系统、压缩机和空调器 Download PDFInfo
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- WO2020107824A1 WO2020107824A1 PCT/CN2019/088255 CN2019088255W WO2020107824A1 WO 2020107824 A1 WO2020107824 A1 WO 2020107824A1 CN 2019088255 W CN2019088255 W CN 2019088255W WO 2020107824 A1 WO2020107824 A1 WO 2020107824A1
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- Prior art keywords
- frequency
- switching frequency
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- compressor
- operating frequency
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
Definitions
- the present application relates to the technical field of compressor control, and in particular, to an operation control method, an operation control system, a compressor, an air conditioner, and a computer-readable storage medium.
- the compressor control of inverter air conditioners is controlled by PWM (Pulse Width Modulation) modulation.
- the output voltage is a series of pulses.
- the width of the pulse depends on the intersection of the modulated wave and the carrier wave ,
- the carrier frequency is also the switching frequency.
- the higher the switching frequency the more the number of pulses in a sine wave cycle, the better the sine of the current waveform, the better the smoothness, the smaller the harmonics, but the greater the power loss of the power module, the power module heats up Increased, excessively high temperature will reduce the life of electronic devices, and even damage the devices.
- the lower the switching frequency the fewer the number of pulses in a sine wave cycle, the worse the sine of the current waveform, the worse the smoothness, and the greater the harmonics, which makes the compressor control effect worse, resulting in increased power consumption .
- the switching frequency controlled by the compressor of the inverter air conditioner is usually fixed at a switching frequency, but is not adjusted according to the actual operating conditions of the compressor and the air conditioner. In most operating situations, this fixed switching frequency cannot play the maximum effect. At the same time, the switching device will generate switching loss during the switching process. This switching loss is the main loss of the inverter air conditioner controller. This loss will reduce the efficiency of the inverter controller and increase the heating of the controller, resulting in a decrease in the reliability of the controller.
- This application aims to solve at least one of the technical problems existing in the prior art or related technologies.
- the first aspect of the present application proposes an operation control method.
- the second aspect of the present application proposes an operation control system.
- the third aspect of the present application proposes a compressor.
- the fourth aspect of the present application proposes an air conditioner.
- a fifth aspect of the present application proposes a computer-readable storage medium.
- the first aspect of the present application provides an operation control method, which is suitable for an inverter bridge control circuit of a compressor, and a power device is provided in the inverter bridge control circuit.
- the operation control method includes: collecting the operation of the compressor Frequency; adjust the switching frequency of the power device to the target switching frequency according to the operating frequency.
- the control circuit collects the operating frequency of the compressor in real time, and dynamically adjusts the switching frequency of the power device in the inverter bridge control circuit according to the collected operating frequency of the compressor, so that the adjusted switching frequency and the current The operating frequency of the compressor is matched, so it can always play its maximum effect.
- the switching circuit is dynamically adjusted correspondingly with the increase or decrease of the compressor frequency through the control circuit.
- the compressor control circuit includes a commercial power supply, a rectifier module, and a PFC (Power Factor Correction) module, as well as an inverter bridge module and a main control chip.
- the main control chip collects the operating frequency of the compressor in real time, and dynamically adjusts the switching frequency of the power device in the inverter bridge module according to the operating frequency of the compressor.
- the frequency in the production process of the compressor, by testing the switching frequency corresponding to the minimum power consumption of the inverter controller at different operating frequencies of the compressor, and setting the switching frequency to the optimal switch of the current operating frequency The frequency finally forms a switching frequency table composed of the compressor frequency and the corresponding optimal switching frequency.
- the main control chip monitors the operating frequency of the compressor in real time, and finds the optimal switching frequency corresponding to the current compressor operating frequency in the switching frequency table through the difference table lookup method, and controls the inverter bridge module to The optimal switching frequency runs.
- further adjusting the switching frequency of the power device to the target switching frequency according to the operating frequency specifically includes: adjusting the switching frequency to the corresponding first target switch based on the collected operating frequency being at least a first operating frequency threshold Frequency; based on the collected operating frequency is less than the second operating frequency threshold, adjust the switching frequency to the corresponding second target switching frequency; based on the collected operating frequency is at least the second operating frequency threshold, and is less than the first operating frequency threshold, keep The switching frequency of the power device is unchanged, wherein the first operating frequency threshold is greater than the second operating frequency threshold, and the first target switching frequency is greater than the second target switching frequency.
- the main control module collects the operating frequency of the compressor in real time, and compares the collected operating frequency with a preset frequency threshold.
- the collected operating frequency is at least the first operating frequency threshold, it indicates that the current operating frequency of the compressor is higher.
- the switching frequency is adjusted to the corresponding first target switching frequency with a higher switching frequency ;
- the switching frequency is adjusted to the corresponding second target switching frequency with a lower switching frequency to reduce the switching device Loss, and reduce the operating temperature of power devices.
- the operating frequency of the compressor is at least the second operating frequency threshold and is less than the first operating frequency threshold, it means that the current compressor is running smoothly and there is no need to adjust the switching frequency.
- the first operating frequency is greater than the second operating frequency, and the corresponding first target switching frequency is greater than the second target switching frequency.
- adjusting the switching frequency of the power device to the target switching frequency according to the operating frequency specifically includes: reducing the switching frequency of the power device to the corresponding target switching frequency based on the collected operating frequency decreasing with time; Based on the collected operating frequency increasing with time, the switching frequency of the power device is increased to the corresponding target switching frequency.
- the main control module collects the operating frequency of the compressor in real time and stores it in the storage medium, and establishes a corresponding operating frequency change curve through the stored operating frequency and the time point at which the operating frequency is acquired.
- the application determines the compressor frequency change trend according to the change curve of probability.
- the switching frequency of the control power device is correspondingly reduced, specifically to the corresponding target switching frequency.
- the switching frequency of the power device is increased correspondingly, and the corresponding increase to the corresponding Target switching frequency to get better control effect.
- the operation control method further includes: collecting the operating temperature of the power device; comparing the magnitude relationship between the operating temperature and the preset temperature threshold, and according to the magnitude relationship, the target switching frequency and/or Or adjust the operating frequency of the compressor.
- a corresponding temperature collection unit is set in the inverter bridge module to collect the working temperature of the power device in real time and send it to the main control module; the main control module compares the working temperature sampling value of the power module with the preset Temperature threshold, and dynamically adjust the target switching frequency of the power device and/or the operating frequency of the compressor according to the specific comparison result, to achieve the overheat protection of the power device on the basis of ensuring the control effect on the compressor, to prevent the power device Overheating causes damage to the system.
- the target switching frequency and/or the compressor operating frequency when comparing the magnitude relationship between the operating temperature and the preset temperature threshold, and adjusting the target switching frequency and/or the compressor operating frequency according to the magnitude relationship, specifically includes: The collected operating temperature is at least the first temperature threshold, and the target switching frequency is correspondingly reduced according to the operating temperature; based on the collected operating temperature is at least the second temperature threshold, the target switching frequency is correspondingly reduced according to the operating temperature, and according to the operating temperature Correspondingly reduce the operating frequency; based on the collected operating temperature is at least a third temperature threshold, control the inverter bridge control circuit to stop working.
- a corresponding temperature threshold is set to determine in real time whether the collected operating temperature exceeds the corresponding temperature threshold. Specifically, when the collected operating temperature is at least the first temperature threshold, it indicates that the power device has an overheating trend, and the target switching frequency is correspondingly reduced to reduce the operating temperature of the power device; when the collected operating temperature is at least the second temperature threshold , It means that the power device has overheated, and only reducing the switching frequency can not suppress the overheating trend. Therefore, the operating frequency of the compressor is reduced while reducing the switching frequency to further reduce the operating temperature of the power device; when the operating temperature is collected at least The third temperature threshold indicates that the power device has been severely overheated and there is a risk of damage. At this time, the inverter bridge control circuit is immediately stopped to prevent the power device from being burned.
- the first temperature threshold is less than the second temperature threshold
- the second temperature threshold is less than the third temperature threshold
- the first temperature threshold is smaller than the second temperature threshold
- the second temperature threshold is smaller than the third temperature threshold. According to the size relationship between the power device and the corresponding temperature threshold, appropriate response operations can be selected to prevent the power device from overheating and burning.
- the second aspect of the present application provides an operation control system for an inverter bridge control circuit of a compressor.
- the inverter bridge control circuit is provided with power devices.
- the control system includes: a sensor module for collecting the operation of the compressor Frequency; the main control module is used to adjust the switching frequency of the power device according to the operating frequency.
- the control circuit collects the operating frequency of the compressor in real time, and dynamically adjusts the switching frequency of the power device in the inverter bridge control circuit according to the collected operating frequency of the compressor, so that the adjusted switching frequency and the current The operating frequency of the compressor is matched, so it can always play its maximum effect.
- the switching circuit is dynamically adjusted correspondingly with the increase or decrease of the compressor frequency through the control circuit.
- the main control module is further configured to: when the collected operating frequency is at least the first operating frequency threshold, adjust the switching frequency to the first preset switching frequency; based on the collected operating frequency less than the second Operating frequency threshold, adjust the switching frequency to the second preset switching frequency; based on the collected operating frequency is at least the second operating frequency, and is less than the first operating frequency, maintain the current switching frequency unchanged; wherein, the first operating frequency threshold is greater than The second operating frequency threshold, the first preset switching frequency is greater than the second preset switching frequency.
- the main control module collects the operating frequency of the compressor in real time, and compares the collected operating frequency with a preset frequency threshold.
- the collected operating frequency is at least the first operating frequency threshold, it indicates that the current operating frequency of the compressor is higher.
- the switching frequency is adjusted to the corresponding first target switching frequency with a higher switching frequency ;
- the switching frequency is adjusted to the corresponding second target switching frequency with a lower switching frequency to reduce the switching device Loss, and reduce the operating temperature of power devices.
- the operating frequency of the compressor is at least the second operating frequency threshold and is less than the first operating frequency threshold, it means that the current compressor is running smoothly and there is no need to adjust the switching frequency.
- the first operating frequency is greater than the second operating frequency, and the corresponding first target switching frequency is greater than the second target switching frequency.
- the main control module is further used to: reduce the switching frequency of the power device to the corresponding target switching frequency based on the collected operating frequency decreasing with time; based on the collected operating frequency increasing with time, Increase the switching frequency of the power device to the corresponding target switching frequency.
- the main control module collects the operating frequency of the compressor in real time and stores it in the storage medium, and establishes a corresponding operating frequency change curve through the stored operating frequency and the time point at which the operating frequency is acquired.
- the application determines the compressor frequency change trend according to the change curve of probability.
- the switching frequency of the control power device is correspondingly reduced, specifically to the corresponding target switching frequency.
- the switching frequency of the power device is increased correspondingly, and the corresponding increase to the corresponding Target switching frequency to get better control effect.
- the sensor module is also used to collect the operating temperature of the power device; the main control module is also used to compare the size relationship between the operating temperature and the preset temperature threshold, and according to the size relationship The target switching frequency and/or the operating frequency of the compressor are adjusted.
- a corresponding temperature collection unit is set in the inverter bridge module to collect the working temperature of the power device in real time and send it to the main control module; the main control module compares the working temperature sampling value of the power module with the preset Temperature threshold, and dynamically adjust the target switching frequency of the power device and/or the operating frequency of the compressor according to the specific comparison result, to achieve the overheat protection of the power device on the basis of ensuring the control effect on the compressor, to prevent the power device Overheating causes damage to the system.
- the main control module is further configured to: based on the collected operating temperature is at least a first temperature threshold, correspondingly reduce the target switching frequency according to the operating temperature; based on the collected operating temperature at least Two temperature thresholds, correspondingly lower the target switching frequency according to the operating temperature, and correspondingly reduce the operating frequency according to the operating temperature; when the collected operating temperature is at least the third temperature threshold, control the inverter bridge control circuit to stop working.
- a corresponding temperature threshold is set to determine in real time whether the collected operating temperature exceeds the corresponding temperature threshold. Specifically, when the collected operating temperature is at least the first temperature threshold, it indicates that the power device has an overheating trend, and the target switching frequency is correspondingly reduced to reduce the operating temperature of the power device; when the collected operating temperature is at least the second temperature threshold , It means that the power device has overheated, and only reducing the switching frequency can not suppress the overheating trend. Therefore, the operating frequency of the compressor is reduced while reducing the switching frequency to further reduce the operating temperature of the power device; when the operating temperature is collected at least The third temperature threshold indicates that the power device has been severely overheated and there is a risk of damage. At this time, the inverter bridge control circuit is immediately stopped to prevent the power device from being burned.
- the first temperature threshold is less than the second temperature threshold
- the second temperature threshold is less than the third temperature threshold
- the first temperature threshold is less than the second temperature threshold
- the second temperature threshold is less than the third temperature threshold. According to the size relationship between the power device and the corresponding temperature threshold, appropriate response operations can be selected to prevent the power device from overheating and burning.
- a third aspect of the present application provides a compressor including the operation control system as described in any one of the above technical solutions, therefore, the compressor includes the operation control system as described in any of the above technical solutions All beneficial effects.
- a fourth aspect of the present application provides an air conditioner including the operation control system described in any one of the above technical solutions and/or the compressor described in any one of the above technical solutions. Therefore, the air conditioner The compressor includes all the beneficial effects of the operation control system described in any of the above technical solutions and/or the compressor as described in any of the above technical solutions.
- a fifth aspect of the present application provides a computer-readable storage medium on which a computer program is stored.
- the computer program is executed by a processor, the operation control method described in any of the above technical solutions is implemented. Therefore, the computer can
- the read storage medium includes all the beneficial effects of the operation control method as described in any of the above technical solutions.
- FIG. 1 shows a flowchart of an operation control method according to an embodiment of the present application
- FIG. 2 shows a schematic diagram of a compressor inverter bridge control circuit according to an embodiment of the present application
- FIG. 3 shows a comparison diagram of the switching frequency and the compressor operating frequency according to an embodiment of the present application
- FIG. 4 shows a comparison diagram of the switching frequency and the compressor operating frequency according to another embodiment of the present application
- FIG. 5 shows a comparison diagram of the switching frequency and the compressor operating frequency according to yet another embodiment of the present application
- FIG. 6 shows a flowchart of an operation control method according to another embodiment of the present application.
- FIG. 7 shows a flowchart of an operation control method according to yet another embodiment of the present application.
- FIG. 8 shows a block diagram of an operation control system according to an embodiment of the present application.
- an operation control method is provided, which is suitable for an inverter bridge control circuit of a compressor, and a power device is provided in the inverter bridge control circuit, and the operation control method include:
- S104 Adjust the switching frequency of the power device to the target switching frequency according to the operating frequency.
- control circuit collects the operating frequency of the compressor in real time, and dynamically adjusts the switching frequency of the power device in the inverter bridge control circuit according to the collected operating frequency of the compressor, so that the adjusted switching frequency and the current
- the operating frequency of the compressor is matched, so it can always play its maximum effect.
- the switching circuit is dynamically adjusted correspondingly with the increase or decrease of the compressor frequency through the control circuit.
- the compressor control circuit includes a commercial power supply, a rectifier module, and a PFC (Power Factor Correction) module, as well as an inverter bridge module and a main control chip.
- the main control chip collects the operating frequency of the compressor in real time, and dynamically adjusts the switching frequency of the power device in the inverter bridge module according to the operating frequency of the compressor.
- the main control chip monitors the operating frequency of the compressor in real time, and finds the optimal switching frequency corresponding to the current compressor operating frequency in the switching frequency table through the difference table lookup method, and controls the inverter bridge module to The optimal switching frequency runs.
- the switching frequency corresponding to the minimum power consumption of the inverter controller in different operating frequency ranges of the compressor is tested, and the switching frequency is set to the optimum of the current operating frequency
- the switching frequency finally forms a comparison chart of the switching frequency fs shown in FIG. 3 and the compressor operating frequency fc.
- the corresponding switching frequency is fs1
- the switching frequency is fs2
- the switching frequency corresponds to fsn.
- the minimum value fsmin and the maximum value fsmax of the switching frequency are determined first, and the carrier ratio K is determined according to fsmin and fsmax and the corresponding operating frequency range of the compressor.
- the corresponding switching frequency can be calculated by the following formula:
- fs is the switching frequency
- K is the carrier ratio
- fc is the operating frequency. If the calculated switching frequency is less than the minimum value fsmin, then set the switching frequency to fsmin; if the calculated switching frequency is greater than the maximum value fsmax, then set the switching frequency to fsmax.
- the compressor first determine the minimum value fsmin and the maximum value fsmax of the switching frequency, and divide the operating frequency of the compressor into multiple intervals according to the level of the operating frequency, and determine the carrier of different intervals respectively Ratio K.
- the carrier ratio is K1
- the carrier ratio is K2
- the carrier ratio is K3
- the carrier ratio is K3.
- the switching frequency is set to fsmin; if the calculated switching frequency is greater than the maximum value fsmax, the switching frequency is set to fsmax.
- adjusting the switching frequency of the power device to the target switching frequency according to the operating frequency specifically includes: when the collected operating frequency is at least the first operating frequency threshold, adjusting the switching frequency to the corresponding The first target switching frequency; when the collected operating frequency is less than the second operating frequency threshold, adjust the switching frequency to the corresponding second target switching frequency; when the collected operating frequency is at least the second operating frequency threshold, and is less than the first
- the switching frequency of the power device is kept unchanged, wherein the first operating frequency threshold is greater than the second operating frequency threshold, and the first target switching frequency is greater than the second target switching frequency.
- the main control module collects the operating frequency of the compressor in real time, and compares the collected operating frequency with a preset frequency threshold.
- the collected operating frequency is at least the first operating frequency threshold, it indicates that the current operating frequency of the compressor is higher.
- the switching frequency is adjusted to the corresponding first target switching frequency with a higher switching frequency ;
- the switching frequency is adjusted to the corresponding second target switching frequency with a lower switching frequency to reduce the switching device Loss, and reduce the operating temperature of power devices.
- the operating frequency of the compressor is at least the second operating frequency threshold and is less than the first operating frequency threshold, it means that the current compressor is running smoothly and there is no need to adjust the switching frequency.
- the first operating frequency is greater than the second operating frequency, and the corresponding first target switching frequency is greater than the second target switching frequency.
- adjusting the switching frequency of the power device to the target switching frequency according to the operating frequency specifically includes: when the operating frequency is collected to decrease with time, reducing the switching frequency of the power device to the corresponding target switch Frequency; when the operating frequency increases with time, the switching frequency of the power device is increased to the corresponding target switching frequency.
- the main control module collects the operating frequency of the compressor in real time and stores it in the storage medium, and establishes a corresponding operating frequency change curve through the stored operating frequency and the time point at which the operating frequency is acquired.
- the application determines the compressor frequency change trend according to the change curve of probability.
- the switching frequency of the control power device is correspondingly reduced, specifically to the corresponding target switching frequency.
- the switching frequency of the power device is increased correspondingly, and the corresponding increase to the corresponding Target switching frequency to get better control effect.
- the operation control method includes:
- S604 Adjust the switching frequency of the power device to the target switching frequency according to the operating frequency
- S608 Compare the magnitude relationship between the operating temperature and the preset temperature threshold, and adjust the target switching frequency and/or the compressor operating frequency according to the magnitude relationship.
- a corresponding temperature collection unit is set in the inverter bridge module to collect the working temperature of the power device in real time and send it to the main control module; the main control module compares the working temperature sampling value of the power module with the preset Temperature threshold, and dynamically adjust the target switching frequency of the power device and/or the operating frequency of the compressor according to the specific comparison result, to achieve the overheat protection of the power device on the basis of ensuring the control effect on the compressor, to prevent the power device Overheating causes damage to the system.
- comparing the magnitude relationship between the operating temperature and the preset temperature threshold, and adjusting the target switching frequency and/or the compressor operating frequency according to the magnitude relationship specifically includes: When the collected operating temperature is at least the first temperature threshold, the target switching frequency is correspondingly reduced according to the operating temperature; when the collected operating temperature is at least the second temperature threshold, the target switching frequency is correspondingly reduced according to the operating temperature, and according to The operating temperature correspondingly reduces the operating frequency; when the collected operating temperature is at least the third temperature threshold, the inverter bridge control circuit is controlled to stop working.
- a corresponding temperature threshold is set to determine in real time whether the collected operating temperature exceeds the corresponding temperature threshold. Specifically, when the collected operating temperature is at least the first temperature threshold, it indicates that the power device has an overheating trend, and the target switching frequency is correspondingly reduced to reduce the operating temperature of the power device; when the collected operating temperature is at least the second temperature threshold , It means that the power device has overheated, and only reducing the switching frequency can not suppress the overheating trend. Therefore, the operating frequency of the compressor is reduced while reducing the switching frequency to further reduce the operating temperature of the power device; when the operating temperature is collected at least The third temperature threshold indicates that the power device has been severely overheated and there is a risk of damage. At this time, the inverter bridge control circuit is immediately stopped to prevent the power device from being burned.
- the first temperature threshold is less than the second temperature threshold
- the second temperature threshold is less than the third temperature threshold
- the first temperature threshold is smaller than the second temperature threshold
- the second temperature threshold is smaller than the third temperature threshold. According to the size relationship between the power device and the corresponding temperature threshold, appropriate response operations can be selected to prevent the power device from overheating and burning.
- the overall flow of operation control is shown in FIG. 7 after the compressor starts to operate:
- S712. Determine whether the operating temperature is greater than the second temperature threshold. When the judgment result is no, return to S702; when the judgment result is yes, go to S714;
- S716 Determine whether the operating temperature is greater than the third temperature threshold. If the judgment result is no, return to S702; when the judgment result is yes, go to S718;
- an operation control system 800 is provided for an inverter bridge control circuit of a compressor, and a power device is provided in the inverter bridge control circuit to control the system It includes: a sensor module 802 for collecting the operating frequency of the compressor; a main control module 804 for adjusting the switching frequency of the power device according to the operating frequency.
- control circuit collects the operating frequency of the compressor in real time, and dynamically adjusts the switching frequency of the power device in the inverter bridge control circuit according to the collected operating frequency of the compressor, so that the adjusted switching frequency and the current
- the operating frequency of the compressor is matched, so it can always play its maximum effect.
- the switching circuit is dynamically adjusted correspondingly with the increase or decrease of the compressor frequency through the control circuit.
- the main control module is further configured to: when the collected operating frequency is at least the first operating frequency threshold, adjust the switching frequency to the first preset switching frequency; When it is less than the second operating frequency threshold, the switching frequency is adjusted to the second preset switching frequency; when the collected operating frequency is at least the second operating frequency and is less than the first operating frequency, the current switching frequency is maintained unchanged; An operating frequency threshold is greater than a second operating frequency threshold, and the first preset switching frequency is greater than the second preset switching frequency.
- the main control module collects the operating frequency of the compressor in real time, and compares the collected operating frequency with a preset frequency threshold.
- the collected operating frequency is at least the first operating frequency threshold, it indicates that the current operating frequency of the compressor is higher.
- the switching frequency is adjusted to the corresponding first target switching frequency with a higher switching frequency ;
- the switching frequency is adjusted to the corresponding second target switching frequency with a lower switching frequency to reduce the switching device Loss, and reduce the operating temperature of power devices.
- the operating frequency of the compressor is at least the second operating frequency threshold and is less than the first operating frequency threshold, it means that the current compressor is running smoothly and there is no need to adjust the switching frequency.
- the first operating frequency is greater than the second operating frequency, and the corresponding first target switching frequency is greater than the second target switching frequency.
- the main control module is further used to: when the collected operating frequency decreases with time, reduce the switching frequency of the power device to the corresponding target switching frequency; the collected operating frequency increases with time When, increase the switching frequency of the power device to the corresponding target switching frequency.
- the main control module collects the operating frequency of the compressor in real time and stores it in the storage medium, and establishes a corresponding operating frequency change curve through the stored operating frequency and the time point at which the operating frequency is acquired.
- the application determines the compressor frequency change trend according to the change curve of probability.
- the switching frequency of the control power device is correspondingly reduced, specifically to the corresponding target switching frequency.
- the switching frequency of the power device is increased correspondingly, and the corresponding increase to the corresponding Target switching frequency to get better control effect.
- the sensor module is further used to collect the operating temperature of the power device; the main control module is also used to compare the size relationship between the operating temperature and the preset temperature threshold, and according to the size relationship Adjust the target switching frequency and/or compressor operating frequency.
- a corresponding temperature collection unit is provided in the inverter bridge module to collect the working temperature of the power device in real time and send it to the main control module; Temperature threshold, and dynamically adjust the target switching frequency of the power device and/or the operating frequency of the compressor according to the specific comparison result, on the basis of ensuring the control effect on the compressor, realize the overheat protection of the power device, prevent Overheating causes damage to the system.
- the main control module is further configured to: when the collected operating temperature is at least the first temperature threshold, correspondingly reduce the target switching frequency according to the operating temperature; when the collected operating temperature is at least When it is the second temperature threshold, the target switching frequency is correspondingly reduced according to the operating temperature, and the operating frequency is correspondingly reduced according to the operating temperature; when the collected operating temperature is at least the third temperature threshold, the inverter bridge control circuit is controlled to stop working.
- a corresponding temperature threshold is set to determine in real time whether the collected operating temperature exceeds the corresponding temperature threshold. Specifically, when the collected operating temperature is at least the first temperature threshold, it indicates that the power device has an overheating trend, and the target switching frequency is correspondingly reduced to reduce the operating temperature of the power device; when the collected operating temperature is at least the second temperature threshold , It means that the power device has overheated, and only reducing the switching frequency can not suppress the overheating trend. Therefore, the operating frequency of the compressor is reduced while reducing the switching frequency to further reduce the operating temperature of the power device; when the operating temperature is collected at least The third temperature threshold indicates that the power device has been severely overheated and there is a risk of damage. At this time, the inverter bridge control circuit is immediately stopped to prevent the power device from being burned.
- the first temperature threshold is less than the second temperature threshold
- the second temperature threshold is less than the third temperature threshold
- the first temperature threshold is less than the second temperature threshold
- the second temperature threshold is less than the third temperature threshold. According to the size relationship between the power device and the corresponding temperature threshold, appropriate response operations can be selected to prevent the power device from overheating and burning.
- a compressor in an embodiment of the third aspect of the present application, includes the operation control system as described in any one of the above embodiments. Therefore, the compressor includes as described in any of the above embodiments All the beneficial effects of the described operation control system.
- an air conditioner including an operation control system as described in any of the above embodiments and/or a compressor as described in any of the above embodiments Therefore, the air conditioner includes all the beneficial effects of the operation control system described in any of the foregoing embodiments and/or the compressor as described in any of the foregoing embodiments.
- a computer-readable storage medium is provided on which a computer program is stored, and when the computer program is executed by a processor, the operation control method as described in any of the above embodiments is implemented, Therefore, the computer-readable storage medium includes all the beneficial effects of the operation control method as described in any of the above embodiments.
- connection can be a fixed connection, can also be detachable connection, or integrally connected; can be directly connected, can also be The intermediary is indirectly connected.
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Abstract
Description
压缩机运行频率 | 开关频率 |
f1 | fs1 |
f2 | fs2 |
f3 | fs3 |
f4 | fs4 |
f5 | fs5 |
f6 | fs6 |
…… | …… |
fn | fsn |
Claims (15)
- 一种运行控制方法,适用于压缩机的逆变桥控制电路,所述逆变桥控制电路中设置有功率器件,其中,所述运行控制方法包括:收集所述压缩机的运行频率;根据所述运行频率调整所述功率器件的开关频率至目标开关频率。
- 根据权利要求1所述的运行控制方法,其中,所述根据所述运行频率调整所述功率器件的开关频率至目标开关频率,具体包括:基于收集到所述运行频率至少是第一运行频率阈值,将所述开关频率调整为对应的第一目标开关频率;基于收集到所述运行频率小于第二运行频率阈值,将所述开关频率调整为对应的第二目标开关频率;基于收集到所述运行频率至少是所述第二运行频率阈值,且小于第一运行频率阈值时,保持所述功率器件的开关频率不变,其中,所述第一运行频率阈值大于所述第二运行频率阈值,所述第一目标开关频率大于所述第二目标开关频率。
- 根据权利要求1所述的运行控制方法,其中,所述根据所述运行频率调整所述功率器件的开关频率至目标开关频率,具体包括:基于收集到所述运行频率随时间降低,降低所述功率器件的开关频率至对应的目标开关频率;基于收集到所述运行频率随时间升高,提高所述功率器件的开关频率至对应的目标开关频率。
- 根据权利要求1至3中任一项所述的运行控制方法,其中,还包括:收集所述功率器件的工况温度;比较所述工况温度与预设温度阈值之间的大小关系,并根据所述大小关系对所述目标开关频率和/或所述压缩机的运行频率进行调整。
- 根据权利要求4所述的运行控制方法,其中,所述比较所述工况温度与所述预设温度阈值之间的大小关系,并根据所述大小关系对所述目标开关频率和/或所述压缩机的运行频率进行调整的步骤,具体包括:基于收集到所述工况温度至少是第一温度阈值,根据所述工况温度对应降低所述目标开关频率;基于收集到所述工况温度至少是第二温度阈值,根据所述工况温度对应降低所述目标开关频率,并根据所述工况温度对应降低所述运行频率;基于收集到所述工况温度至少是第三温度阈值,控制所述逆变桥控制电路停止工作。
- 根据权利要求5所述的运行控制方法,其中,所述第一温度阈值小于所述第二温度阈值,所述第二温度阈值小于所述第三温度阈值。
- 一种运行控制系统,适用于压缩机的逆变桥控制电路,所述逆变桥控制电路中设置有功率器件,其中,所述控制系统包括:传感器模块,用于收集所述压缩机的运行频率;主控模块,用于根据所述运行频率调整所述功率器件的开关频率至目标开关频率。
- 根据权利要求7所述的运行控制系统,其中,所述主控模块还用于:基于收集到所述运行频率至少是第一运行频率阈值,将所述开关频率调整为对应的第一目标开关频率;基于收集到所述运行频率小于第二运行频率阈值,将所述开关频率调整为对应的第二目标开关频率;基于收集到所述运行频率至少是所述第二运行频率阈值,且小于第一运行频率阈值时,保持所述功率器件的开关频率不变,其中,所述第一运行频率阈值大于所述第二运行频率阈值,所述第一目标开关频率大于所述第二目标开关频率。
- 根据权利要求8所述的运行控制系统,其中,所述主控模块还用于:基于收集到所述运行频率随时间降低,降低所述功率器件的开关频率至对应的目标开关频率;基于收集到所述运行频率随时间升高,提高所述功率器件的开关频率至对应的目标开关频率。
- 根据权利要求7至9中任一项所述的运行控制系统,其中,所述 传感器模块还用于收集所述功率器件的工况温度;所述主控模块还用于比较所述工况温度与预设温度阈值之间的大小关系,并根据所述大小关系对所述目标开关频率和/或所述压缩机的运行频率进行调整。
- 根据权利要求10所述的运行控制系统,其中,所述主控模块还用于:基于收集到所述工况温度至少是第一温度阈值,根据所述工况温度对应降低所述目标开关频率;基于收集到所述工况温度至少是第二温度阈值,根据所述工况温度对应降低所述目标开关频率,并根据所述工况温度对应降低所述运行频率;基于收集到所述工况温度至少是第三温度阈值,控制所述逆变桥控制电路停止工作。
- 根据权利要求11所述的运行控制系统,其中,所述第一温度阈值小于所述第二温度阈值,所述第二温度阈值小于所述第三温度阈值。
- 一种压缩机,其中,所述压缩机包括如权利要求7至12中任一项所述的运行控制系统。
- 一种空调器,其中,所述空调器包括如权利要求7至12中任一项所述的运行控制系统;和/或如权利要求13所述的压缩机。
- 一种计算机可读存储介质,其上存储有计算机程序,其中:所述计算机程序被处理器执行时实现如权利要求1至6中任一项所述的运行控制方法。
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