CN111525494B - Drive control circuit, control method, device, compressor, air conditioner and medium - Google Patents

Drive control circuit, control method, device, compressor, air conditioner and medium Download PDF

Info

Publication number
CN111525494B
CN111525494B CN202010372877.9A CN202010372877A CN111525494B CN 111525494 B CN111525494 B CN 111525494B CN 202010372877 A CN202010372877 A CN 202010372877A CN 111525494 B CN111525494 B CN 111525494B
Authority
CN
China
Prior art keywords
power supply
switching device
switching
control circuit
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010372877.9A
Other languages
Chinese (zh)
Other versions
CN111525494A (en
Inventor
刘国峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Midea Group Co Ltd, GD Midea Heating and Ventilating Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN202010372877.9A priority Critical patent/CN111525494B/en
Publication of CN111525494A publication Critical patent/CN111525494A/en
Application granted granted Critical
Publication of CN111525494B publication Critical patent/CN111525494B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/06—Arrangements for supplying operative power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • 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
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention provides a drive control circuit, a control method, a device, a compressor, an air conditioner and a medium, wherein the drive control circuit comprises: supply circuit and with the switch control assembly that supply circuit's input and/or output are connected, the switch control assembly includes: the switching device is suitable for enabling the power supply loop to be conducted according to a voltage signal of the switching power supply; the operation detection device is suitable for controlling the connection or disconnection between the switching power supply and the switching device according to the detected load operation parameters; and the energy storage element is arranged between the switching device and the switching power supply, wherein the switching power supply is disconnected from the switching device, the energy storage element is suitable for afterflowing to the switching device, the voltage signal is reduced to be smaller than a disconnection voltage threshold value, and the switching device cuts off a power supply loop. According to the technical scheme, the phenomenon that the switching device is subjected to electric shock failure due to overlarge current can be prevented, and the reliability of cutting off a power supply loop through the switching device is improved.

Description

Drive control circuit, control method, device, compressor, air conditioner and medium
Technical Field
The invention relates to the technical field of compressor control, in particular to a drive control circuit, an operation control method, an operation control device, a compressor, an air conditioner and a computer readable storage medium.
Background
In order to ensure the safety of the operation of the air conditioning system, if the abnormal operation of the pressure container is detected, the compressor needs to be controlled to stop operating in time.
In the related art, a mechanical pressure switch is connected in series in a main circuit or a switch control circuit of a compressor, but when the mode detects that the pressure is too high, a switch device of the main circuit is directly cut off, so that high-current load cut-off is easily generated, and the risk that the switch device is damaged due to the fact that contact arcs are stuck exists, and the main circuit cannot be completely cut off.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, an object of the present invention is to provide a drive control circuit.
Another object of the present invention is to provide an operation control method, an operation control device, a compressor, an air conditioner, and a computer-readable storage medium.
In order to achieve the above object, according to an aspect of the first aspect of the present invention, there is provided a drive control circuit including: supply circuit and with the switch control subassembly that supply circuit's input and/or output are connected, the switch control subassembly includes: the switching device is suitable for enabling the power supply loop to be conducted according to a voltage signal of the switching power supply; the operation detection device is suitable for controlling the connection or disconnection between the switching power supply and the switching device according to the detected operation parameters of the load; and the energy storage element is arranged between the switching device and the switching power supply, wherein the switching power supply is disconnected from the switching device, the energy storage element is suitable for afterflowing to the switching device, the voltage signal is reduced to be less than a disconnection voltage threshold value, and the switching device cuts off a power supply loop.
In the technical scheme, the switch control assembly in the drive control circuit comprises a switch device and an operation detection device, and is further provided with an energy storage element, if the operation detection device detects that the operation parameters of a load in the drive control circuit are abnormal, the switch power supply is controlled to be disconnected, at the moment, the energy storage element discharges, the switch device continues current, the voltage reduction speed at two ends of the switch device is reduced, almost no load current exists when the switch device is cut off, the phenomenon that the switch device is subjected to electric shock and failure due to overlarge current can be prevented, and the reliability of cutting off a power supply loop through the switch device is improved.
The switching device may be disposed at an input end and/or an output end of the power supply circuit, and if the switching device is disposed at the input end, the power supply circuit current flowing through the switching device is an alternating current, and if the switching device is disposed at the output end, the power supply circuit current flowing through the switching device is a direct current, so as to determine the type of the switching device according to a set position.
Specifically, taking the compressor as an example of a load, the detected operation parameter is the discharge pressure of the compressor, the operation detection device is specifically a pressure detection module, if the detected pressure is too high, the operation of the compressor is indicated to be abnormal, and at this time, the compressor is controlled to stop operating by timely cutting off the switch device.
In addition, the load can also be a fan, the detected operation parameter can be the rotating speed of the fan, and if the rotating speed of the fan is detected to be abnormal, the switch device also needs to be cut off in time.
In the above technical solution, the power supply circuit includes a rectifying module, the rectifying module is adapted to output a corresponding dc signal according to an input ac signal, and the driving control circuit further includes: the power control module is suitable for controlling the load to operate according to the direct current signal; and the power control module stops running when the switching power supply output by the switching power supply is detected to be disconnected from the switching device.
In the technical scheme, the power supply loop comprises a rectification module, the rectification module is used for configuring an input alternating current signal into a direct current signal, the driving control circuit further comprises a power control module, the power control module comprises an inverter, and the inverter can convert the direct current signal into the alternating current signal according to a received signal so as to supply power to a load.
The driving control circuit further comprises a power control module, the power control module is directly or indirectly electrically connected with the switch control assembly, whether the power control module stops running can be determined according to a detection result of whether the switch power supply and the switch device are disconnected, the power control module can quickly respond to the situation that the power control module stops running when an overvoltage fault is detected, the load is controlled to stop running in time, the power control module actively stops working according to a scheme that a detected voltage signal is reduced to a specified value, and the reliability of controlling the load to stop running can be improved by combining a scheme that the switch device disconnects a power supply loop.
In any one of the above technical solutions, the method further includes: and the driving chip is respectively and electrically connected with the switch control assembly and the power control module, wherein if the driving chip detects that the voltage signal is less than or equal to the fault voltage threshold, the power control module is controlled to stop running, and the fault voltage threshold is greater than the disconnection voltage threshold.
In the technical scheme, the fault voltage threshold value can be prestored in the driving chip and is greater than the disconnection voltage threshold value, so that the response of stopping operation can be made before the switching device is disconnected, the response efficiency can be improved, and the delay of stopping operation of the load can be reduced.
The driving chip can be arranged inside or outside a module of the power control module, and is provided with a voltage detection pin for detecting the sampling voltage of the switch control assembly, so that when the output voltage is detected to be reduced to be less than or equal to the fault voltage threshold value, the power control module is controlled to stop running.
In addition, the controlling the power control module to stop running specifically includes controlling to stop outputting the switch control signal to the power device in the power control module.
In any one of the above technical solutions, the switch control assembly further includes: the first voltage transformation device is arranged between the switching power supply and the driving chip and/or between the switching power supply and the switching device and is suitable for adjusting a first voltage signal output to the switching device and/or a second voltage signal detected by the driving chip so that the first voltage signal is smaller than the second voltage signal.
In the technical scheme, the first voltage transformation device is arranged to adjust the voltage value of the first voltage signal and/or the second voltage signal, so that the response rate of the switching device and/or the power control module is adjusted.
In any one of the above technical solutions, the switch device includes a plurality of switch devices, the plurality of switch devices are arranged in parallel, and the switch control assembly further includes: and the second voltage transformation device is arranged between the switching power supply and the at least one switching device and is suitable for enabling the plurality of switching devices to receive different voltage signals.
In the technical scheme, the plurality of parallel switch devices are arranged, so that current shunt can be realized, the current value flowing through each switch device is reduced, the switch device is favorable for preventing electric shock caused by disconnection under the condition of large current, and the service life and the reliability of the switch device are further favorably improved.
The first voltage transformation device and the second voltage transformation device may be specifically voltage transformation chips.
In any one of the above technical solutions, the method further includes: a thermistor arranged in series with the at least one switching device.
In the technical scheme, the temperature of the circuit can be detected by arranging a thermistor.
In any of the above solutions, the switching device includes a relay and/or a contactor.
In the technical scheme, the relay and/or the contactor are/is adopted as the switch device, so that the preparation cost and the whole volume of the drive control circuit are reduced.
The switching device may be other devices having a switching function.
In any of the above technical solutions, the energy storage element includes a plurality of capacitors, one end of each capacitor is grounded, and the other end of each capacitor is connected to a loop between the switching device and the switching power supply.
In the technical scheme, the follow current of the switching device is realized by arranging the energy storage elements so as to delay and reduce the voltage, the reduction time can be determined by the parameters of the energy storage elements, and the voltage reduction time can be prolonged by increasing the number of the energy storage elements so as to ensure the reliable turn-off of the switching device.
As an embodiment, a capacitor is used as the energy storage element.
In any one of the above technical solutions, the power supply circuit further includes: the power factor correction module is arranged between the rectification module and the power control module and comprises an energy storage inductor and a filter capacitor; the input end of the energy storage inductor is connected to the output end of the rectifying module, the output end of the energy storage inductor is connected to the first end of the switching device, the second end of the switching device is connected to the filter capacitor, and the two ends of the filter capacitor are configured to be power supply ends of the power supply loop.
In the technical scheme, as a setting mode of the switching device, the switching device is connected in series with the output end of the energy storage inductor, so that the universal switching device is connected in series in a main loop of the driving control circuit, the cost and the volume of the switching device can be reduced, and the service life and the opening and closing reliability can be ensured.
According to a second aspect of the present invention, there is provided an operation control method including: and when the operating parameter of the load is detected to be not matched with the reference threshold value, controlling to cut off a power supply signal of the switch control assembly, wherein the switch control assembly is provided with an energy storage element and a switching device, the energy storage element is suitable for afterflow of the switching device, the voltage signal of the switching device is reduced to be less than the cut-off voltage threshold value, and the switching device cuts off the power supply loop.
In the technical scheme, the switch control assembly in the drive control circuit comprises a switch device and an operation detection device, and is further provided with an energy storage element, the operation parameter of the load is detected, whether the load operates abnormally is detected, if the operation parameter of the load is detected to be abnormal, the switch power supply is controlled to be disconnected, at the moment, the energy storage element discharges electricity, the switch device continues current, the voltage reduction speed at two ends of the switch device is reduced, almost no load current exists when the switch device is cut off, the phenomenon that the switch device is subjected to electric shock failure due to overlarge current can be prevented, and the reliability of cutting off a power supply loop through the switch device is improved.
In the above technical solution, the power supply circuit includes a rectifying module, the rectifying module is adapted to output a corresponding dc signal according to an input ac signal, the driving control circuit further includes a power control module, the power control module is adapted to control the load to operate according to the dc signal, and the operation control method further includes: and when the sampling voltage of the switch control assembly is detected to be reduced to be less than or equal to the fault voltage threshold value, controlling the power control module to stop running.
In the technical scheme, the driving control circuit further comprises a power control module, the power control module is directly or indirectly electrically connected with the switch control assembly, whether the power control module stops operating can be determined according to a detection result of whether the switch power supply and the switch device are disconnected, the power control module can quickly respond to the overvoltage fault and stop operating when the overvoltage fault is detected, the load is controlled to stop operating in time, the power control module actively stops operating according to a scheme that the detected voltage signal is reduced to a specified value, and the reliability of controlling the load to stop operating can be improved by combining a scheme that the switch device disconnects a power supply loop.
In the above technical solution, the fault voltage threshold is greater than the trip voltage threshold.
In the technical scheme, the fault voltage threshold value can be prestored in the driving chip and is greater than the disconnection voltage threshold value, so that the response of stopping operation can be made before the switching device is disconnected, the response efficiency can be improved, and the delay of stopping operation of the load can be reduced.
The driving chip can be arranged inside or outside a module of the power control module, and is provided with a voltage detection pin for detecting the sampling voltage of the switch control assembly, so that when the output voltage is detected to be reduced to be less than or equal to a fault voltage threshold value, the power control module is controlled to stop running.
According to a third aspect of the present invention, there is provided an operation control device, adapted to a driving control circuit, the driving control circuit being adapted to control a load to operate, the driving control circuit including a power supply circuit and a switch control component electrically connected to each other, the operation control device including: a memory and a processor; a memory for storing program code; and the processor is used for calling the program codes to execute the operation control method defined by any technical scheme in the first aspect of the invention.
The operation control device according to the present invention includes a processor that can implement the steps defined in the operation control method according to any one of the first aspect when executing the computer program, and therefore, all the advantageous effects of the operation control method described above are achieved, and are not described herein.
According to an aspect of the fourth aspect of the present invention, there is also provided a compressor, including: a load; the drive control circuit and/or the operation control device as defined in the above-mentioned first aspect and/or the above-mentioned third aspect are adapted to control the operation of the load.
According to a technical solution of the fifth aspect of the present invention, there is also provided an air conditioner, comprising: the outdoor unit comprises a compressor, and the compressor is connected with a gas exhaust pipeline and a gas return pipeline.
According to an aspect of the sixth aspect of the present invention, a computer-readable storage medium is further provided, on which a computer program is stored, and the computer program is executed to implement the operation control method defined in any one of the above aspects.
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 shows a schematic diagram of a drive control circuit according to an embodiment of the invention;
FIG. 2 shows a schematic diagram of a drive control circuit according to another embodiment of the invention;
FIG. 3 shows a schematic diagram of a drive control circuit according to yet another embodiment of the invention;
FIG. 4 shows a schematic flow diagram of an operation control method according to an embodiment of the invention;
FIG. 5 shows a schematic flow diagram of an operation control method according to another embodiment of the invention;
fig. 6 shows a schematic block diagram of an operation control device according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:
the power supply circuit comprises a power supply circuit 10, a switch control assembly 20, a switch device 202, a running detection device 204, an energy storage element 206, a switching power supply 30, a power control module 40, a first driving chip 402, a pressure detection device 204A, a rectification module 102, a second driving chip 50, a first voltage transformation device 208 and a second voltage transformation device 210.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Example one
As shown in fig. 1, a drive control circuit according to an embodiment of the present invention includes: supply circuit 10 and with the switch control assembly 20 of the input and/or output connection of supply circuit 10, switch control assembly 20 includes: a switching device 202, the switching device 202 is suitable for making the power supply loop 10 conductive according to the voltage signal of the switching power supply 30; an operation detection device 204 adapted to control the switching power supply 30 to be turned on or off with the switching device 202 according to the detected operation parameter of the load; and an energy storage element 206 disposed between the switching device 202 and the switching power supply 30, wherein the switching power supply 30 is disconnected from the switching device 202, the energy storage element 206 is adapted to freewheel to the switching device 202, the voltage signal drops to less than an off-voltage threshold, and the switching device 202 cuts off the power supply loop 10.
In this embodiment, the switch control component in the driving control circuit includes, in addition to the switching device 202 and the operation detection device 204, an energy storage element 206, and if the operation detection device 204 detects that the operation parameter of the load driven and operated by the driving control circuit is abnormal, the power supply of the switching power supply 30 is controlled to be cut off, at this time, the energy storage element 206 discharges electricity to continue current flow to the switching device 202, so as to slow down the speed of voltage drop across the switching device 202, so that almost no load current flows when the switching device 202 is cut off, thereby preventing the occurrence of an electric shock failure phenomenon of the switching device 202 due to an excessive current, and improving the reliability of cutting off the power supply loop 10 by the switching device 202.
The switching device 202 may be disposed at an input end and/or an output end of the power supply circuit 10, if the switching device 202 is disposed at the input end, the current of the power supply circuit 10 flowing through the switching device 202 is an alternating current, and if the switching device 202 is disposed at the output end, the current of the power supply circuit 10 flowing through the switching device 202 is a direct current, so as to determine the type of the switching device 202 according to the disposed position.
Specifically, taking a compressor as an example of a load, the detected operation parameter is an exhaust pressure of the compressor, the operation detection device 204 is specifically a pressure detection module, if the detected pressure is too large, it indicates that the compressor is abnormal in operation, and at this time, the compressor is controlled to stop operating by timely disconnecting the switch device 202.
In addition, the load can also be a fan, the detected operation parameter can be the rotating speed of the fan, and if the rotating speed of the fan is detected to be abnormal, the switch device 202 also needs to be cut off in time.
Example two
As shown in fig. 2, according to a driving control circuit of another embodiment of the present invention, on the basis of the first embodiment, the power supply circuit includes a rectifying module 102, the rectifying module 102 is adapted to output a corresponding dc signal according to an input ac signal, and the driving control circuit further includes: and the power control module 40, wherein the power control module 40 is suitable for controlling the load operation according to the direct current signal.
If the operation detection device 204 detects that the load is abnormally operated, the electrical connection between the switching device 202 and the switching power supply 30 is disconnected, and at this time, the power control module 40 stops operating when the switching power supply 30 that outputs from the switching power supply 30 is detected to be disconnected from the switching device 202.
In this embodiment, the power supply circuit includes a rectifying module 102, the rectifying module 102 is configured to configure an input ac signal into a dc signal, the driving control circuit further includes a power control module 40, and the power control module 40 includes an inverter capable of converting the dc signal into the ac signal according to a received signal to supply power to a load.
The driving control circuit further comprises a power control module 40, the power control module 40 is electrically connected with the switch control component directly or indirectly, so that whether the power control module 40 stops operating can be determined according to a detection result of whether the switch power supply 30 is disconnected with the switch device 202, the power control module 40 can quickly respond to the stop operating when an overvoltage fault is detected, the load is controlled to stop operating in time, and the reliability of controlling the load to stop operating can be improved by combining a scheme that the power control module 40 stops operating actively when a detected voltage signal is reduced to a specified value and a scheme that the switch device 202 disconnects a power supply loop.
In any of the above embodiments, further comprising: the driving chip specifically includes a first driving chip 402, the first driving chip 402 is disposed inside a module of the power control module 40 and connected to the switch control component, if the first driving chip 402 detects that a voltage signal of the switch control component is less than or equal to a fault voltage threshold, the power control module 40 is controlled to stop operating, and the fault voltage threshold is greater than a cut-off voltage threshold.
As an arrangement of the energy storage element, the energy storage element includes a plurality of capacitors, i.e., a capacitor C1 and a capacitor C2 as shown in fig. 2, one end of the capacitor is grounded, and the other end of the capacitor is connected to a loop between the switching device 202 and the switching power supply 30.
In this embodiment, the energy storage elements are arranged to realize follow current of the switching device, so that the voltage is delayed and decreased, the decrease time can be determined by the parameters of the energy storage elements, and the voltage decrease time can be prolonged by increasing the number of the energy storage elements, so as to ensure reliable turn-off of the switching device.
In this embodiment, the fault voltage threshold may be pre-stored in the first driving chip 402, and the fault voltage threshold is greater than the turn-off voltage threshold, so that the response of stopping operation may be made before the switching device 202 is turned off, and thus the response efficiency may be improved, and the delay of stopping operation of the load may be reduced.
The first driving chip 402 is provided with a voltage detection pin that detects the sampling voltage of the switch control component to control the power control module 40 to stop operating when detecting that the output voltage drops to less than or equal to the fault voltage threshold.
In addition, controlling the power control module 40 to stop operating specifically includes controlling to stop outputting the switching control signal to the power devices in the power control module 40.
EXAMPLE III
As shown in fig. 3, according to the driving control circuit of another embodiment of the present invention, the operation detection device is specifically a pressure detection device 204A, the load is specifically a compressor, the driving chip further includes a second driving chip 50 disposed outside the module of the power control module 40, and electrically connected to the switch control component and the first driving chip 402, respectively, wherein if the second driving chip 50 detects that the voltage signal is less than or equal to the fault voltage threshold, the power control module 40 is controlled to stop operating, and the fault voltage threshold is greater than the disconnection voltage threshold.
The energy storage element comprises a plurality of capacitors, i.e. a capacitor C1 and a capacitor C2 as shown in fig. 3, one end of the capacitor is grounded, and the other end of the capacitor is connected to a loop between the switch device 202 and the switching power supply 30.
As shown in fig. 3, in any of the above embodiments, the switch control assembly further comprises: the first voltage transformation device 208 is disposed between the switching power supply 30 and the second driving chip 50, and/or disposed between the switching power supply 30 and the switching device, and the first voltage transformation device is adapted to adjust a first voltage signal output to the switching device and/or a second voltage signal detected by the driving chip, so that the first voltage signal is smaller than the second voltage signal.
In this embodiment, the adjustment of the response rate of the switching device and/or the power control module 40 is achieved by setting the first voltage transformation device to adjust the voltage value of the first voltage signal and/or the second voltage signal.
In any one of the above embodiments, the switching device includes a plurality of switching devices, such as RY1 and RY2 shown in fig. 3, the plurality of switching devices are arranged in parallel, and the switching control assembly further includes: the second voltage transformation device 210 is arranged between the switching power supply 30 and the switching device RY1, the second voltage transformation device 210 is arranged between the switching power supply 30 and the switching device RY2, and the second voltage transformation device is suitable for enabling the plurality of switching devices to receive different voltage signals.
In the embodiment, the plurality of switching devices connected in parallel are arranged, so that current shunting can be realized, the current value flowing through each switching device is reduced, electric shock caused by disconnection of the switching devices under the condition of high current is prevented, and the service life and the reliability of the switching devices are prolonged.
The first voltage transformation device and the second voltage transformation device may be specifically voltage transformation chips.
In any of the above embodiments, further comprising: a thermistor PTC is arranged in series with at least one switching device.
In this embodiment, the circuit temperature can also be detected by providing a thermistor PTC.
In any of the above embodiments, the switching device comprises a relay and/or a contactor.
In this embodiment, by using the relay and/or the contactor as the switching device, it is advantageous to reduce the manufacturing cost and the entire volume of the drive control circuit.
The switching device may be other devices having a switching function.
In any of the above embodiments, the energy storage element comprises a plurality of capacitors, one end of each capacitor is grounded, and the other end of each capacitor is connected to a loop between the switching device and the switching power supply 30.
In this embodiment, the energy storage elements are arranged to realize follow current of the switching device, so that the voltage is delayed and decreased, the decrease time can be determined by the parameters of the energy storage elements, and the voltage decrease time can be prolonged by increasing the number of the energy storage elements, so as to ensure reliable turn-off of the switching device.
In any of the above embodiments, the power supply circuit further comprises: the power factor correction module is arranged between the rectifying module 102 and the power control module 40, and comprises an energy storage inductor L and a filter capacitor C1; the input end of the energy storage inductor L is connected to the output end of the rectifying module 102, the output end of the energy storage inductor L is connected to the first end of the switching device, the second end of the switching device is connected to the filter capacitor C1, and two ends of the filter capacitor C1 are configured as the power supply ends of the power supply loop.
In this embodiment, as a setting mode of the switching device, the switching device is connected in series to the output end of the energy storage inductor L, so that the general switching device is connected in series to the main loop of the driving control circuit, which can reduce the cost and volume of the switching device and ensure the service life and reliability of opening and closing.
Example four
As shown in fig. 4, an operation control method according to an embodiment of the present invention includes:
step S402, detecting that the operating parameter of the load is not matched with the reference threshold value, and controlling to cut off a power supply signal of the switch control assembly, wherein the switch control assembly is provided with an energy storage element and a switch device, the energy storage element is suitable for afterflow of the switch device, the voltage signal of the switch device is reduced to be smaller than the cut-off voltage threshold value, and the switch device cuts off a power supply loop.
Wherein, for the compressor, detecting that the operating parameter of the load does not match the reference threshold specifically includes: and detecting that the exhaust pressure of the compressor is greater than a reference pressure threshold value, wherein the reference pressure threshold value represents the maximum pressure value of the normal operation of the compressor.
In this embodiment, the switch control component in the driving control circuit includes a switch device and an operation detection device, and is further provided with an energy storage element, the operation parameter of the load is detected to detect whether the load operates abnormally, if the operation parameter of the load is detected to be abnormal, the power supply of the switch power supply is controlled to be cut off, at this time, the energy storage element discharges, and the switch device continues current, so that the speed of voltage reduction at two ends of the switch device is reduced, almost no load current exists when the switch device is cut off, and therefore the phenomenon that the switch device is subjected to electric shock and failure due to overlarge current can be prevented, and the reliability of cutting off a power supply loop through the switch device is improved.
In addition, the power supply loop comprises a rectifying module which is suitable for outputting a corresponding direct current signal according to an input alternating current signal, and the driving control circuit further comprises a power control module which is suitable for controlling the load to operate according to the direct current signal.
EXAMPLE five
As shown in fig. 5, an operation control method according to another embodiment of the present invention includes:
and step S502, detecting that the operating parameter of the load is not matched with the reference threshold value, and controlling to cut off a power supply signal of the switch control component.
Step S504, if the sampling voltage of the switch control module is detected to be decreased to be less than or equal to the fault voltage threshold, the power control module is controlled to stop operating.
Wherein the fault voltage threshold is greater than the trip voltage threshold.
In this embodiment, the driving control circuit further includes a power control module, where the power control module is electrically connected to the switch control component directly or indirectly, so as to determine whether the power control module stops operating according to a detection result of whether the switching power supply and the switching device are disconnected, so as to quickly respond to the stop operating when an overvoltage fault is detected, and timely control the load to stop operating.
In this embodiment, the driving chip may pre-store the fault voltage threshold, and the fault voltage threshold is greater than the turn-off voltage threshold, so that the response of stopping operation may be made before the switching device is turned off, and thus the response efficiency may be improved, and the delay of stopping operation of the load may be reduced.
The driving chip can be arranged inside or outside a module of the power control module, and is provided with a voltage detection pin for detecting the sampling voltage of the switch control assembly, so that when the output voltage is detected to be reduced to be less than or equal to the fault voltage threshold value, the power control module is controlled to stop running.
As shown in fig. 6, the operation control device 60 according to the embodiment of the present invention is adapted to a driving control circuit, the driving control circuit is adapted to control the operation of a load, the driving control circuit includes a power supply circuit and a switch control component electrically connected to each other, and the operation control device includes: a memory 602 and a processor 604; a memory 602 for storing program code; a processor 604 for calling program code to execute the operation control method defined in any of the above embodiments.
The operation control device provided by the present invention includes a processor capable of implementing the steps defined in the operation control method according to any one of the embodiments of the first aspect when executing the computer program, and therefore, all the advantageous effects of the operation control method described above are provided, which are not described herein.
A compressor according to an embodiment of the present invention includes: a load; the drive control circuit and/or the operation control device defined in the above embodiments are adapted to control the operation of the load.
Wherein, the load can be a variable frequency motor.
The frequency conversion according to the embodiment of the invention comprises: a load; the drive control circuit and/or the operation control device defined in the above embodiments are adapted to control the operation of the load.
Wherein, the load can be a variable frequency motor.
An air conditioner according to an embodiment of the present invention includes: the outdoor unit comprises a compressor, and the compressor is connected with a gas exhaust pipeline and a gas return pipeline.
The air conditioner further includes: frequency conversion fan.
A computer-readable storage medium according to an embodiment of the invention, has stored thereon a computer program which, when executed, carries out the steps of the operation control method as defined in any one of the embodiments above.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the scope of the invention as defined in the appended claims and their equivalents, and it is intended that the invention encompass such changes and modifications as well.

Claims (12)

1. A drive control circuit adapted to control operation of a load, the drive control circuit comprising a supply loop and a switch control assembly connected to an input and/or an output of the supply loop, the switch control assembly comprising:
the switching device is suitable for enabling the power supply loop to be conducted according to a voltage signal of the switching power supply;
the operation detection device is suitable for controlling the switching power supply and the switching device to be switched on or switched off according to the detected operation parameters of the load;
an energy storage element disposed between the switching device and the switching power supply,
wherein the switching power supply is disconnected from the switching device, the energy storage element is adapted to freewheel to the switching device, the voltage signal drops below an off-voltage threshold, and the switching device cuts off the power supply loop;
the power supply circuit comprises a rectification module, the rectification module is suitable for outputting a corresponding direct current signal according to an input alternating current signal, and the drive control circuit further comprises:
the power control module is suitable for controlling the load to operate according to the direct current signal;
a driving chip electrically connected to the switch control assembly and the power control module respectively,
if the driving chip detects that the voltage signal is smaller than or equal to a fault voltage threshold value, the power control module is controlled to stop running, and the fault voltage threshold value is larger than the disconnection voltage threshold value.
2. The drive control circuit of claim 1, wherein the switch control component further comprises:
the first voltage transformation device is arranged between the switching power supply and the driving chip and/or between the switching power supply and the switching device and outputs a first voltage signal to the switching device, the voltage signal detected by the driving chip is a second voltage signal, and the first voltage transformation device is suitable for adjusting the first voltage signal output to the switching device and/or the second voltage signal detected by the driving chip so as to enable the first voltage signal to be smaller than the second voltage signal.
3. The drive control circuit according to claim 1, wherein the switching device includes a plurality of switching devices, the plurality of switching devices being arranged in parallel, the switching control assembly further comprising:
and the second voltage transformation device is arranged between the switching power supply and at least one switching device and is suitable for enabling a plurality of switching devices to receive different voltage signals.
4. The drive control circuit according to claim 3, characterized by further comprising:
a thermistor disposed in series with at least one of the switching devices.
5. The drive control circuit according to any one of claims 1 to 4,
the switching device comprises a relay and/or a contactor.
6. The drive control circuit according to any one of claims 1 to 4,
the energy storage element comprises a plurality of capacitors, one end of each capacitor is grounded, and the other end of each capacitor is connected into a loop between the switch device and the switch power supply.
7. The drive control circuit according to any one of claims 1 to 4, wherein the power supply circuit further includes:
the power factor correction module is arranged between the rectification module and the power control module and comprises an energy storage inductor and a filter capacitor;
the input end of the energy storage inductor is connected to the output end of the rectifying module, the output end of the energy storage inductor is connected to the first end of the switch device, the second end of the switch device is connected to the filter capacitor, and two ends of the filter capacitor are configured to be power supply ends of the power supply loop.
8. An operation control method, which is suitable for a driving control circuit, the driving control circuit is suitable for controlling the operation of a load, the driving control circuit comprises a power supply loop and a switch control component which are electrically connected, and the operation control method comprises the following steps:
detecting that the operating parameter of the load does not match a reference threshold, controlling to cut off a power supply signal of the switch control component,
the switch control assembly is provided with an energy storage element and a switching device, the energy storage element is suitable for afterflowing to the switching device, a voltage signal of the switching device is reduced to be smaller than a cut-off voltage threshold value, and the switching device cuts off the power supply loop;
the power supply loop comprises a rectification module, the rectification module is suitable for outputting a corresponding direct current signal according to an input alternating current signal, the drive control circuit further comprises a power control module, the power control module is suitable for controlling the load to operate according to the direct current signal, and the operation control method further comprises the following steps:
when the voltage signal of the switching device is detected to be reduced to be less than or equal to a fault voltage threshold value, controlling the power control module to stop running;
the fault voltage threshold is greater than the trip voltage threshold.
9. An operation control device suitable for a drive control circuit, the drive control circuit being suitable for controlling the operation of a load, the drive control circuit comprising a power supply circuit and a switch control assembly electrically connected, the operation control device comprising: a memory and a processor;
the memory for storing program code;
the processor, configured to call the program code to execute the operation control method according to claim 8.
10. A compressor, comprising:
a load;
the drive control circuit according to any one of claims 1 to 7 and/or the operation control device according to claim 9, adapted to control the operation of the load.
11. An air conditioner, comprising:
the compressor of claim 10.
12. A computer-readable storage medium on which an operation control program is stored, characterized in that the operation control program realizes the operation control method according to claim 8 when executed by a processor.
CN202010372877.9A 2020-05-06 2020-05-06 Drive control circuit, control method, device, compressor, air conditioner and medium Active CN111525494B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010372877.9A CN111525494B (en) 2020-05-06 2020-05-06 Drive control circuit, control method, device, compressor, air conditioner and medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010372877.9A CN111525494B (en) 2020-05-06 2020-05-06 Drive control circuit, control method, device, compressor, air conditioner and medium

Publications (2)

Publication Number Publication Date
CN111525494A CN111525494A (en) 2020-08-11
CN111525494B true CN111525494B (en) 2022-07-01

Family

ID=71912139

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010372877.9A Active CN111525494B (en) 2020-05-06 2020-05-06 Drive control circuit, control method, device, compressor, air conditioner and medium

Country Status (1)

Country Link
CN (1) CN111525494B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102201666A (en) * 2010-03-26 2011-09-28 德昌电机(深圳)有限公司 Control circuit and motor device using control circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10303246B3 (en) * 2003-01-28 2004-10-28 Infineon Technologies Ag Switch control circuit for switched power factor converter has signal generation circuit responding to detected critical condition for providing control signal with pulse ratio dependent on regulation signal
JP4975352B2 (en) * 2006-04-03 2012-07-11 東芝キヤリア株式会社 Air conditioner
US20070297111A1 (en) * 2006-06-27 2007-12-27 Jerry Watson Lowe Low frequency switch
KR101270336B1 (en) * 2009-04-17 2013-05-31 다이킨 고교 가부시키가이샤 Power circuit, and computer-readable recording medium containing a control program for power circuits
CN107681626A (en) * 2017-09-13 2018-02-09 广东美的制冷设备有限公司 The protection circuit and its control method of air-conditioner controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102201666A (en) * 2010-03-26 2011-09-28 德昌电机(深圳)有限公司 Control circuit and motor device using control circuit
CN102201701A (en) * 2010-03-26 2011-09-28 德昌电机(深圳)有限公司 Control circuit, motor device and fan with motor device

Also Published As

Publication number Publication date
CN111525494A (en) 2020-08-11

Similar Documents

Publication Publication Date Title
US8988836B2 (en) Power circuit, and computer-readable recording medium storing a control program for power circuits
CN110594953A (en) Compressor driving device, compressor pressure protection method and air conditioner
CN108292574B (en) Switching device and method for controlling at least one switching device
CN102801378A (en) Motor control device and air conditioner possessing same
CN109979782B (en) Operation control method and device, household appliance and computer readable storage medium
EP2001096B1 (en) Controller
CN111525494B (en) Drive control circuit, control method, device, compressor, air conditioner and medium
US11888388B2 (en) Electric compressor control device
CN204992560U (en) Energy bypass circuit
JP2021131184A (en) Air conditioner and method for operating air conditioner
CN109458695A (en) A kind of demagnetization guard method of power-off compressor and device
US10734833B2 (en) Voltage regulator of a generator
JP4623220B2 (en) Power circuit
KR101657228B1 (en) Apparatus for controlling stand-by power of air conditioner
CN108307651B (en) Air conditioning apparatus
CN210154027U (en) Fault-tolerant circuit of variable-frequency air conditioner controller
CN108027159B (en) Air conditioner and control method for air conditioner
JP5671697B2 (en) Air conditioner
CN108599128A (en) A kind of excess voltage protection and compressor with the circuit and air conditioner
CN101821936B (en) System and method for energizing an electric motor auxiliary winding and electric motor
CN213841426U (en) Double-high-voltage switch protection device and dehumidifier
CN215498271U (en) Control device of direct-current power supply and air conditioner
KR100308563B1 (en) Outdoor unit power supply and method of the separate air conditioner
US20220128286A1 (en) Air conditioner and preheating operation method
WO2019230453A1 (en) Discharge control device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant