WO2017211128A1 - Circuit de protection de compresseur, procédé et appareil - Google Patents

Circuit de protection de compresseur, procédé et appareil Download PDF

Info

Publication number
WO2017211128A1
WO2017211128A1 PCT/CN2017/080816 CN2017080816W WO2017211128A1 WO 2017211128 A1 WO2017211128 A1 WO 2017211128A1 CN 2017080816 W CN2017080816 W CN 2017080816W WO 2017211128 A1 WO2017211128 A1 WO 2017211128A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
compressor
circuit
output
control switch
Prior art date
Application number
PCT/CN2017/080816
Other languages
English (en)
Chinese (zh)
Inventor
陈名才
庞伟
Original Assignee
珠海格力电器股份有限公司
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 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Publication of WO2017211128A1 publication Critical patent/WO2017211128A1/fr

Links

Images

Classifications

    • 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
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • 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
    • 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
    • H02H5/04—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 temperature
    • 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
    • H02H5/04—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 temperature
    • H02H5/047—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 temperature using a temperature responsive switch
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/08—Cylinder or housing parameters
    • F04B2201/0801—Temperature

Definitions

  • the present invention relates to the field of compressor control, and in particular to a compressor protection circuit, method and device.
  • the existing compressor overheat protection is realized by the normally closed temperature control switch. Specifically, the temperature of the compressor cylinder is detected by the normally closed temperature control switch, and the compressor cylinder temperature reaches the preset of the normally closed temperature control switch. When the action limit is reached, the normally closed temperature control switch changes from the closed state to the open state, and then the change signal corresponding to the state change of the normally closed temperature control switch is transmitted to the Micro Control Unit (MCU), and the MCU detects the change. The signal indicates that the compressor is overheated. The change signal is the overheat signal of the compressor. After the MCU detects the overheat signal of the compressor, the intelligent power module (Intelligent Power Module, IPM) stops outputting the control signal to control the compression. The machine stopped working.
  • IPM Intelligent Power Module
  • the normally closed temperature control switch operates and generates a corresponding temperature control switch action signal, and the temperature control switch action signal needs to pass through the MCU first.
  • the MCU controls the IPM circuit to indirectly control the compressor to stop working.
  • the protection action path in the above scheme is: hardware (for example, normally closed temperature control switch) - software (for example, MCU) - hardware (for example, IPM circuit) - compressor.
  • Embodiments of the present invention provide a compressor protection circuit, method, and apparatus to solve at least the technical problem of low reliability of an existing compressor overheat protection scheme.
  • a compressor protection circuit comprising: a voltage dividing circuit, wherein a temperature control switch is disposed in the voltage dividing circuit, and the voltage dividing circuit is configured to respond to the An action output voltage signal of the temperature control switch, wherein the temperature control switch operates based on a cylinder temperature of the compressor; and a signal processing circuit is connected to the voltage dividing circuit for using a voltage signal output by the voltage dividing circuit
  • the reference voltage signal outputs a control signal based on a comparison result of the reference voltage signal and the comparison voltage signal; and a power device connected to the signal processing circuit for controlling an operating state of the compressor based on the control signal.
  • the signal processing circuit includes: a comparator including a non-inverting input terminal, an inverting input terminal, and a signal output terminal, wherein the inverting input terminal is connected to an output end of the voltage dividing circuit, and is configured to: And inputting a voltage signal output by the voltage dividing circuit; the positive phase input terminal is configured to input the comparison voltage signal; and the signal output terminal is configured to output the control signal.
  • a comparator including a non-inverting input terminal, an inverting input terminal, and a signal output terminal, wherein the inverting input terminal is connected to an output end of the voltage dividing circuit, and is configured to: And inputting a voltage signal output by the voltage dividing circuit; the positive phase input terminal is configured to input the comparison voltage signal; and the signal output terminal is configured to output the control signal.
  • the voltage dividing circuit includes: a DC power source connected to the first end of the temperature control switch; a first resistor, the first end is connected to the second end of the temperature control switch; and the second resistor is One end is connected to the second end of the first resistor, the second end is grounded, and the first end of the second resistor is further connected to the inverting input end of the comparator.
  • the protection circuit further includes: a sampling circuit, wherein the sampling circuit comprises: a current sampling device, connected to the compressor, for sampling a current flowing through the compressor to obtain a sampling signal; And a third resistor, the first end is connected to the sampling signal output end obtained by the current sampling device, and the second end is connected to the positive phase input end of the comparator.
  • the sampling circuit further includes: a filter capacitor, the first end is connected to the second end of the third resistor, and the second end is grounded.
  • the current sampling device is any one of the following: a resistor, an inductive transformer, and a current Hall sensor.
  • the comparator is further configured to output a high level control signal when the comparison voltage signal is greater than the reference voltage signal; wherein the high level control signal is used to control the power device to stop A control signal is output to control the compressor to stop operating.
  • a compressor protection method comprising: a voltage dividing circuit outputting a reference voltage signal to a signal processing circuit in response to an action of a temperature control switch, wherein the temperature control switch a compressor-based cylinder temperature action; the signal processing circuit outputs a control signal to the power device based on the reference voltage signal; the power device controls an operating state of the compressor under the trigger of the control signal.
  • a compressor protection device comprising: a first output module, configured to output a reference voltage signal to a signal processing circuit by a voltage dividing circuit in response to an action of the temperature control switch The temperature control switch is operated based on the cylinder temperature of the compressor; the second output module is configured to output a control signal to the power device based on the reference voltage signal by the signal processing circuit; and the control module is configured to pass the The power device controls the operating state of the compressor under the trigger of the control signal.
  • the temperature control switch is based on the cylinder temperature action of the compressor, and the voltage dividing circuit responds to the action output voltage signal of the temperature control switch, and uses the voltage signal as a reference voltage signal of the signal processing circuit to compare the reference voltage signal and The signal processing circuit compares the voltage signal, and the signal processing circuit outputs a control signal based on the comparison result, and the power device controls the operating state of the compressor according to the control signal.
  • the voltage dividing circuit, the signal processing circuit, and the power device are all hardware circuits, and the compressor can be realized by the above three hardware circuits.
  • the control of the working state can control the compressor to stop working through the above three hardware circuits, thereby achieving overheat protection of the compressor, and removing the influence of the software compared with the prior art, It relies entirely on the hardware, which improves the reliability of the compressor overheat protection and solves the problem of low reliability of the existing compressor overheat protection scheme.
  • FIG. 1 is a schematic diagram of a compressor protection circuit in accordance with an embodiment of the present invention
  • FIG. 2 is a schematic diagram of an alternative compressor protection circuit in accordance with an embodiment of the present invention.
  • FIG. 3 is a schematic diagram showing the principle of a compressor protection circuit according to an embodiment of the invention.
  • FIG. 4 is a flow chart of a compressor protection method in accordance with an embodiment of the present invention.
  • Figure 5 is a schematic illustration of a compressor protection device in accordance with an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a compressor protection circuit according to an embodiment of the present invention, as shown in FIG.
  • the circuit can include:
  • the voltage dividing circuit 10 is provided with a temperature control switch in the voltage dividing circuit, and the voltage dividing circuit is configured to output a voltage signal in response to the action of the temperature control switch, wherein the temperature control switch operates based on the cylinder temperature of the compressor;
  • the signal processing circuit 30 is connected to the voltage dividing circuit, and is configured to use the voltage signal outputted by the voltage dividing circuit as a reference voltage signal, and output a control signal based on a comparison result between the reference voltage signal and the comparison voltage signal;
  • the power device 50 is coupled to the signal processing circuit for controlling the operating state of the compressor based on the control signal.
  • the temperature control switch is based on the cylinder temperature action of the compressor, and the voltage dividing circuit responds to the action output voltage signal of the temperature control switch, and uses the voltage signal as a reference voltage signal of the signal processing circuit to compare the reference voltage signal and the signal.
  • the comparison voltage signal of the processing circuit outputs a control signal based on the comparison result, and the power device controls the operating state of the compressor according to the control signal.
  • the voltage dividing circuit, the signal processing circuit and the power device are all hardware circuits, and the above three hardware circuits can realize the control of the working state of the compressor, for example, when the compressor is overheated, Three hardware circuits can control the compressor to stop working, thus achieving overheat protection of the compressor.
  • the influence of the software is removed, and the hardware is completely dependent, thereby improving the reliability of the compressor overheat protection.
  • the problem of low reliability of the existing compressor overheat protection scheme is solved.
  • the temperature control switch is set in the voltage dividing circuit, and the temperature of the cylinder of the compressor is detected by the temperature control switch.
  • the temperature control switch operates and divides the voltage.
  • the circuit responds to the output voltage signal of the temperature control switch, and the voltage dividing circuit is connected with the signal processing circuit, and the voltage signal outputted by the voltage dividing circuit is used as a reference voltage signal of the signal processing circuit, and the comparison voltage signal of the reference voltage signal and the signal processing circuit is compared.
  • the signal processing circuit outputs a control signal according to the comparison result, and the control signal is used as a protection signal of the power device to detect an input signal of the input end, and the power device controls the normal operation of the compressor according to the control signal, that is, the power device output is used to control the normal operation of the compressor.
  • the compressor control signal the compressor works normally, or the power device controls the compressor to stop according to the control signal, that is, the power device stops outputting the compressor control signal for controlling the normal operation of the compressor, and the compressor stops working.
  • the above power device can be an intelligent power module IPM.
  • the signal processing circuit includes: a comparator including a non-inverting input terminal, an inverting input terminal, and a signal output terminal, wherein the inverting input terminal is connected to the output terminal of the voltage dividing circuit for input The voltage signal output by the voltage dividing circuit; the positive phase input terminal is used for inputting the comparison voltage signal; the signal output terminal is used for outputting the control signal.
  • the output end of the voltage dividing circuit is connected to the inverting input terminal of the comparator, that is, the signal input by the inverting input terminal of the comparator is a voltage signal output by the voltage dividing circuit in response to the temperature control switch action.
  • the comparator's non-inverting input inputs a comparison voltage signal, and the comparator's two inputs compare the signals, that is, compare the reference voltage signals and compare.
  • the voltage signal is output by the comparator based on the comparison result, and the control signal is used as an input signal of the protection signal of the power device detection input terminal, and the power device controls the compressor to work normally or stop working according to the control signal.
  • the comparator is used to output the control signal instead of using the software to output the control signal. Therefore, the reliability of the control signal is high, and the reliability of the compressor protection is improved.
  • the voltage dividing circuit includes: a DC power source connected to the first end of the temperature control switch; a first resistor, the first end is connected to the second end of the temperature control switch; and the second resistor is first The terminal is connected to the second end of the first resistor, the second end is grounded, and the first end of the second resistor is further connected to the inverting input terminal of the comparator.
  • the above voltage dividing circuit is a DC bias voltage dividing circuit.
  • the DC power source is divided by the first resistor and the second resistor, and the voltage signal corresponding to the operating state of the temperature control switch is represented by the voltage signal of the first end of the second resistor.
  • the hardware circuit of the voltage dividing circuit responds to the action of the temperature control switch and outputs a corresponding voltage signal, thereby providing a reliable signal basis for the subsequent hardware circuit.
  • the protection circuit further includes: a sampling circuit, wherein the sampling circuit comprises: a current sampling device connected to the compressor for sampling a current flowing through the compressor to obtain a sampling signal; and a third resistor The first end is connected to the sampling signal output end obtained by the current sampling device, and the second end is connected to the positive phase input end of the comparator.
  • the current flowing through the compressor is sampled by a current sampling device (such as a sampling resistor), and the current signal is converted into a voltage signal (ie, the sampling signal described above), and passes through a third resistor, and is second in the third resistor.
  • the terminal outputs a comparison voltage signal, that is, a comparison voltage signal of the comparator's non-inverting input terminal.
  • the comparison voltage signal of the comparator's non-inverting input terminal is obtained through the sampling circuit, that is, the comparison voltage signal is obtained through the hardware circuit, thereby providing a reliable signal basis for the subsequent hardware circuit.
  • the sampling circuit further includes: a filter capacitor, the first end is connected to the second end of the third resistor, and the second end is grounded.
  • the current flowing through the compressor is sampled by the current sampling device, and the current signal is converted into a voltage signal (ie, the sampling signal described above), and the sampling signal is filtered by the third resistor and the filter capacitor, and then the third resistor is The second end of the output compares the voltage signal.
  • a voltage signal ie, the sampling signal described above
  • the sampling signal is subjected to filtering processing by the third resistor and the filter capacitor, so that a comparative voltage signal with high stability and high reliability can be obtained.
  • the current sampling device is any one of the following: a resistor, an inductive transformer, and a current Hall sensor.
  • the current flowing through the compressor is sampled by a resistor, an inductive transformer or a current Hall sensor, that is, a sampling of a current signal of the hardware circuit, thereby providing a reliable signal basis for subsequent hardware circuits.
  • the comparator is further configured to output a high level control signal when the comparison voltage signal is greater than the reference voltage signal; wherein the high level control signal is used to control the power device to stop outputting the control signal, Control the compressor to stop working.
  • the signal output end of the comparator when the comparison voltage signal is greater than the reference voltage signal, the signal output end of the comparator outputs a high level signal, and the power device stops outputting the control signal under the trigger of the high level signal to control the compressor to stop working;
  • the signal output end of the comparator When the comparison voltage signal is less than or equal to the reference voltage signal, the signal output end of the comparator outputs a low level signal, and the power device continuously outputs a control signal under the trigger of the low level signal to control the normal operation of the compressor.
  • the comparator is used to output a control signal for controlling the operating state of the compressor, so that based on the hardware circuit, the reliability of the compressor overheat protection can be improved compared to the scheme of outputting the control signal with software.
  • the first end of the resistor R1 (ie, the first resistor described above) is connected to the DC bias power supply VCC (ie, the DC power supply described above) through the temperature control switch K1, and the second end of the resistor R1 passes through the resistor R2 ( That is, the above second resistor) is connected to the power ground to constitute a DC bias voltage dividing circuit (ie, the voltage dividing circuit described above).
  • the connection point of the resistor R1 and the resistor R2 is connected to the inverting input terminal of the comparator, and the voltage of the connection point of the resistor R1 and the resistor R2 is the bias voltage dividing signal VREF (ie, the reference voltage signal described above), and the bias voltage is divided.
  • the signal VREF is used as an inverting input signal of the comparator; the non-inverting input of the comparator is connected to the compressor current sampling resistor node (corresponding to the first end of the sampling resistor R6) through the resistor R3 (ie, the third resistor described above) when compressing
  • the compressor current sampling resistor node corresponding to the first end of the sampling resistor R6
  • the resistor R3 ie, the third resistor described above
  • the intelligent power module IPM stops outputting the control signal under the trigger of the high level control signal to control the compressor to stop working, and when the comparator outputs a low level control signal I.e. detecting the overcurrent protection signal input terminal CIN receives a low level control signal, the compressor continues to output a control signal to control the compressor work.
  • the senor for sensing the temperature of the compressor cylinder in the above embodiment may be a normally closed temperature control switch, referred to as a temperature control switch.
  • the temperature control switch K1 when the temperature of the cylinder of the compressor is detected by the temperature control switch in a normal temperature state, that is, the cylinder temperature of the compressor does not reach the preset operation threshold Tp of the temperature control switch K1, the temperature control switch K1 is in a closed state.
  • the inverting input signal VREF of the comparator is a bias voltage dividing signal after the resistor R1 and the resistor R2 divide the DC bias power source VCC.
  • IP the intelligent power module
  • the IPM protects the current value
  • the voltage signal generated on the sampling resistor R6 is processed by the resistor R3 and the filter capacitor C, and the positive phase input signal VIN input at the non-inverting input terminal of the comparator is greater than the inverting input signal VREF
  • the comparator The output signal of the signal output end changes from a low level signal to a high level signal.
  • the intelligent power module IPM stops outputting the control signal to Control the compressor to stop working, thus achieving the compressor overcurrent protection function under normal temperature conditions.
  • the temperature control switch changes from the closed state to the open state, that is, the resistor R1 is disconnected from the DC bias power supply VCC, and the comparator input is inverted.
  • the signal VREF is 0.
  • the current corresponding to the current sampling resistor R6 of the compressor must also be 0. Otherwise, the output signal of the signal output of the comparator will always output a high level signal, and the intelligent power module IPM
  • the overcurrent protection detection signal input terminal detects the high level signal, stops outputting the control signal to control the compressor to stop working, that is, after the temperature control switch is turned off, the comparator outputs a high level signal, and the intelligent power module IPM enters protection. Mode, stop output control signal to control the compressor to stop working, thus achieving the compressor overheat protection function.
  • the type of the above comparator may be LM293ADR or other models; the above-mentioned intelligent power module IPM is IPM PS219C5-AS, and other similar overcurrents may be used.
  • the model that protects the input function; the functions of the individual pins of the intelligent power module IPM and the functions of each pin are shown in Table 1.
  • the compressor overheat protection action path of the above embodiment of the present application is: hardware (such as a temperature control switch) - hardware (such as a signal processing circuit) - a compressor,
  • hardware such as a temperature control switch
  • hardware such as a signal processing circuit
  • a compressor a compressor
  • an embodiment of a compressor protection method is provided, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and Although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.
  • FIG. 4 is a flow chart of a compressor protection method according to an embodiment of the present invention. As shown in FIG. 4, the method includes the following steps:
  • Step S402 the voltage dividing circuit outputs a reference voltage signal to the signal processing circuit in response to the action of the temperature control switch, wherein the temperature control switch operates based on the cylinder temperature of the compressor;
  • Step S404 the signal processing circuit outputs a control signal to the power device based on the reference voltage signal
  • Step S406 the power device controls the working state of the compressor under the trigger of the control signal.
  • the temperature control switch is based on the cylinder temperature action of the compressor, and the voltage dividing circuit responds to the action output voltage signal of the temperature control switch, and uses the voltage signal as a reference voltage signal of the signal processing circuit to compare the reference voltage signal and the signal.
  • the comparison voltage signal of the processing circuit outputs a control signal based on the comparison result, and the power device controls the operating state of the compressor according to the control signal.
  • the voltage dividing circuit, the signal processing circuit and the power device are all hardware circuits, and the above three hardware circuits can realize the control of the working state of the compressor, for example, when the compressor is overheated.
  • Three hardware circuits can control the compressor to stop working, thereby achieving overheat protection of the compressor, and removing the influence of the software compared with the prior art. It relies entirely on the hardware, which improves the reliability of the compressor overheat protection and solves the problem of low reliability of the existing compressor overheat protection scheme.
  • the temperature control switch is set in the voltage dividing circuit, and the temperature of the cylinder of the compressor is detected by the temperature control switch.
  • the temperature control switch operates and divides the voltage.
  • the circuit responds to the output voltage signal of the temperature control switch, and the voltage dividing circuit is connected with the signal processing circuit, and the voltage signal outputted by the voltage dividing circuit is used as a reference voltage signal of the signal processing circuit, and the comparison voltage signal of the reference voltage signal and the signal processing circuit is compared.
  • the signal processing circuit outputs a control signal according to the comparison result, and the control signal is used as a protection signal of the power device to detect an input signal of the input end, and the power device controls the normal operation of the compressor according to the control signal, that is, the power device output is used to control the normal operation of the compressor.
  • the compressor control signal the compressor works normally, or the power device controls the compressor to stop according to the control signal, that is, the power device stops outputting the compressor control signal for controlling the normal operation of the compressor, and the compressor stops working.
  • the above power device can be an intelligent power module IPM.
  • outputting the control signal to the power device based on the reference voltage signal includes: comparing the reference voltage signal with the comparison voltage signal by the comparator to obtain a comparison result, wherein comparing the voltage signal to sampling the current flowing through the compressor The generated signal; based on the comparison result, outputs a control signal to the power device, wherein the signal processing circuit includes a comparator.
  • the output end of the voltage dividing circuit is connected to the inverting input terminal of the comparator, that is, the signal input by the inverting input terminal of the comparator is a voltage signal output by the voltage dividing circuit in response to the temperature control switch action.
  • the comparator's non-inverting input inputs a comparison voltage signal, and the comparator's two input signals are compared, that is, the reference voltage signal and the comparison voltage signal are compared, and the comparator outputs a control signal based on the comparison result, and the control signal is used as a power device.
  • the protection signal detects an input signal at the input end, and the power device controls the compressor to operate normally or stop working according to the control signal.
  • the comparator is used to output the control signal instead of using the software to output the control signal. Therefore, the reliability of the control signal is high, and the reliability of the compressor protection is improved.
  • outputting the control signal to the power device based on the comparison result includes: outputting a high level control signal to the power device when the comparison voltage signal is greater than the reference voltage signal, and receiving the high level control by the power device When the signal is signaled, the output control signal is stopped to control the compressor to stop working.
  • the signal output end of the comparator when the comparison voltage signal is greater than the reference voltage signal, the signal output end of the comparator outputs a high level signal, and the power device stops outputting the control signal under the trigger of the high level signal to control the compressor to stop working;
  • the signal output end of the comparator When the comparison voltage signal is less than or equal to the reference voltage signal, the signal output end of the comparator outputs a low level signal, and the power device continuously outputs a control signal under the trigger of the low level signal to control the normal operation of the compressor.
  • the comparator is used to output a control signal for controlling the operating state of the compressor, so that based on the hardware circuit, the reliability of the compressor overheat protection can be improved compared to the scheme of outputting the control signal with software.
  • the temperature control switch based on the cylinder temperature action of the compressor includes: when the cylinder temperature of the compressor exceeds the action threshold, from the closed state to the open state; at the cylinder temperature of the compressor When the operating threshold is not exceeded, the closed state remains unchanged; after the voltage dividing circuit outputs the reference voltage signal in response to the action of the temperature control switch, the method further includes: when the temperature control switch is in an open state, the signal processing circuit is based on the voltage dividing circuit output The reference voltage signal outputs an overheat protection control signal; when the temperature control switch is in a closed state, the signal processing circuit outputs an overcurrent protection control signal based on the reference voltage signal output by the voltage dividing circuit.
  • the temperature control switch changes from the closed state to the open state, and the reference voltage signal output by the voltage dividing circuit is 0, that is, the comparison of the signal processing circuit
  • the inverting input signal of the device is 0.
  • the theoretically corresponding comparator's positive phase input signal must be 0. Otherwise, the comparator will always output a high level signal (ie, the above described overheat protection control signal).
  • the power module stops outputting the control signal under the trigger of the high level signal to control the compressor to stop working, thereby implementing the compressor overheat protection function; when the temperature control switch detects that the temperature of the compressor does not exceed the action threshold, That is, when the compressor is in a normal temperature state, the temperature control switch remains closed.
  • the reference voltage signal output by the voltage dividing circuit is also That is, the inverting input signal of the comparator is smaller than the positive phase input signal.
  • the comparator outputs a high level signal, and the power module stops under the trigger of the high level signal.
  • the output control signal is stopped to control the compressor to stop working, thereby achieving the compressor overcurrent protection function under normal temperature conditions.
  • the compressor overheat protection is combined with the compressor overcurrent protection, and compression is realized by designing simple hardware detection (such as the above-mentioned voltage dividing circuit and sampling circuit) and executing circuit (such as the above comparator and power device).
  • simple hardware detection such as the above-mentioned voltage dividing circuit and sampling circuit
  • executing circuit such as the above comparator and power device.
  • Machine overheat protection does not depend on any software code, does not require software security certification, the program is simple and easy to implement, low cost and high reliability.
  • FIG. 5 is a schematic diagram of a compressor protection device according to an embodiment of the present invention. As shown in FIG. 5, the protection device may include a first output module 51, a second output module 53, and a control module 55.
  • the first output module 51 is configured to output a reference voltage signal to the signal processing circuit by the voltage dividing circuit in response to the action of the temperature control switch, wherein the temperature control switch operates based on the cylinder temperature of the compressor;
  • a second output module 53 for outputting a control signal to the power device based on the reference voltage signal by the signal processing circuit
  • the control module 55 is configured to control the working state of the compressor by the power device under the trigger of the control signal.
  • the temperature control switch is based on the cylinder temperature action of the compressor, and the voltage dividing circuit responds to the action output voltage signal of the temperature control switch, and uses the voltage signal as a reference voltage signal of the signal processing circuit to compare the reference voltage signal and the signal. Processing the comparison voltage signal of the circuit, and the signal processing circuit outputs the control signal based on the comparison result,
  • the power device controls the operating state of the compressor based on the control signal.
  • the voltage dividing circuit, the signal processing circuit and the power device are all hardware circuits, and the above three hardware circuits can realize the control of the working state of the compressor, for example, when the compressor is overheated, Three hardware circuits can control the compressor to stop working, thus achieving overheat protection of the compressor. Compared with the prior art, the influence of the software is removed, and the hardware is completely dependent, thereby improving the reliability of the compressor overheat protection. The problem of low reliability of the existing compressor overheat protection scheme is solved.
  • the temperature control switch is set in the voltage dividing circuit, and the temperature of the cylinder of the compressor is detected by the temperature control switch.
  • the temperature control switch operates and divides the voltage.
  • the circuit responds to the output voltage signal of the temperature control switch, and the voltage dividing circuit is connected with the signal processing circuit, and the voltage signal outputted by the voltage dividing circuit is used as a reference voltage signal of the signal processing circuit, and the comparison voltage signal of the reference voltage signal and the signal processing circuit is compared.
  • the signal processing circuit outputs a control signal according to the comparison result, and the control signal is used as a protection signal of the power device to detect an input signal of the input end, and the power device controls the normal operation of the compressor according to the control signal, that is, the power device output is used to control the normal operation of the compressor.
  • the compressor control signal the compressor works normally, or the power device controls the compressor to stop according to the control signal, that is, the power device stops outputting the compressor control signal for controlling the normal operation of the compressor, and the compressor stops working.
  • the above power device can be an intelligent power module IPM.
  • the compressor overheat protection is combined with the compressor overcurrent protection, and compression is realized by designing simple hardware detection (such as the above-mentioned voltage dividing circuit and sampling circuit) and executing circuit (such as the above comparator and power device).
  • simple hardware detection such as the above-mentioned voltage dividing circuit and sampling circuit
  • executing circuit such as the above comparator and power device.
  • Machine overheat protection does not depend on any software code, does not require software security certification, the program is simple and easy to implement, low cost and high reliability.
  • the disclosed technical contents may be implemented in other manners.
  • the device embodiments described above are only schematic.
  • the division of the unit may be a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, unit or module, and may be electrical or otherwise.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple units. Some or all of the units may be selected according to actual needs to implement the solution of the embodiment. the goal of.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and the like. .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Computer Hardware Design (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

La présente invention concerne un circuit de protection du compresseur qui comprend : un circuit diviseur de tension (10), muni d'un commutateur de commande de température et servant à délivrer un signal de tension en réponse à une action du commutateur de commande de température, le commutateur de commande de température agissant sur la température d'un cylindre du compresseur ; un circuit de traitement de signal (30) relié au circuit diviseur de tension (10) et utilisé pour délivrer un signal de commande sur la base d'un résultat de comparaison d'un signal de tension de référence, à savoir le signal de tension délivré par le circuit diviseur de tension et un signal de tension de comparaison ; et un dispositif d'alimentation (50), connecté au circuit de traitement de signal (30) et utilisé pour commander l'état de fonctionnement du compresseur sur la base du signal de commande. L'invention résout le problème technique de la faible fiabilité d'un système existant de protection contre la surchauffe des compresseurs. L'invention concerne également un procédé et un appareil de protection de compresseur.
PCT/CN2017/080816 2016-06-06 2017-04-17 Circuit de protection de compresseur, procédé et appareil WO2017211128A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610398943.3 2016-06-06
CN201610398943.3A CN106089669B (zh) 2016-06-06 2016-06-06 压缩机保护电路、方法及装置

Publications (1)

Publication Number Publication Date
WO2017211128A1 true WO2017211128A1 (fr) 2017-12-14

Family

ID=57228048

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/080816 WO2017211128A1 (fr) 2016-06-06 2017-04-17 Circuit de protection de compresseur, procédé et appareil

Country Status (2)

Country Link
CN (1) CN106089669B (fr)
WO (1) WO2017211128A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109441792A (zh) * 2019-01-10 2019-03-08 北京汇能精电科技股份有限公司 风扇缓启电路及系统
CN109659905A (zh) * 2019-01-07 2019-04-19 山东朗进科技股份有限公司 一种ipm过电流及过温保护电路
EP3597915A1 (fr) * 2018-07-20 2020-01-22 Emerson Climate Technologies GmbH Protection de compresseur de réfrigération

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106089669B (zh) * 2016-06-06 2017-11-21 珠海格力电器股份有限公司 压缩机保护电路、方法及装置
CN111463755A (zh) * 2020-03-30 2020-07-28 海信（山东）空调有限公司 一种pfc过压保护电路和pfc电路

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0546981A2 (fr) * 1991-12-12 1993-06-16 Carrier Corporation Protection contre suréchauffement pour compresseur triphasé
EP1947341A1 (fr) * 2007-01-19 2008-07-23 STMicroelectronics Design and Application S.R.O. Système d'automatisation de turbine à vapeur basée sur une architecture de bus de terrain/Profibus
CN203859488U (zh) * 2014-04-02 2014-10-01 美的集团股份有限公司 一种空调器及其压缩机保护电路
CN104184118A (zh) * 2013-05-24 2014-12-03 珠海格力电器股份有限公司 变频空调器负载保护电路
CN106089669A (zh) * 2016-06-06 2016-11-09 珠海格力电器股份有限公司 压缩机保护电路、方法及装置
US20160329699A1 (en) * 2014-04-02 2016-11-10 Midea Group Co., Ltd. Air conditioner and compressor protection circuit thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3433470B2 (ja) * 1993-05-25 2003-08-04 株式会社デンソー 負荷駆動回路
JP3774385B2 (ja) * 2001-07-26 2006-05-10 株式会社デノン 増幅器の保護回路
CN102290784A (zh) * 2010-06-17 2011-12-21 鸿富锦精密工业（深圳）有限公司 高温保护电路
JP5628233B2 (ja) * 2012-03-15 2014-11-19 日立アプライアンス株式会社 モータ駆動装置、流体圧縮システム、及び空気調和機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0546981A2 (fr) * 1991-12-12 1993-06-16 Carrier Corporation Protection contre suréchauffement pour compresseur triphasé
EP1947341A1 (fr) * 2007-01-19 2008-07-23 STMicroelectronics Design and Application S.R.O. Système d'automatisation de turbine à vapeur basée sur une architecture de bus de terrain/Profibus
CN104184118A (zh) * 2013-05-24 2014-12-03 珠海格力电器股份有限公司 变频空调器负载保护电路
CN203859488U (zh) * 2014-04-02 2014-10-01 美的集团股份有限公司 一种空调器及其压缩机保护电路
US20160329699A1 (en) * 2014-04-02 2016-11-10 Midea Group Co., Ltd. Air conditioner and compressor protection circuit thereof
CN106089669A (zh) * 2016-06-06 2016-11-09 珠海格力电器股份有限公司 压缩机保护电路、方法及装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3597915A1 (fr) * 2018-07-20 2020-01-22 Emerson Climate Technologies GmbH Protection de compresseur de réfrigération
CN109659905A (zh) * 2019-01-07 2019-04-19 山东朗进科技股份有限公司 一种ipm过电流及过温保护电路
CN109441792A (zh) * 2019-01-10 2019-03-08 北京汇能精电科技股份有限公司 风扇缓启电路及系统

Also Published As

Publication number Publication date
CN106089669B (zh) 2017-11-21
CN106089669A (zh) 2016-11-09

Similar Documents

Publication Publication Date Title
WO2017211128A1 (fr) Circuit de protection de compresseur, procédé et appareil
CN102263402B (zh) 一种dc电源的过流保护电路及过流保护方法
WO2017114134A1 (fr) Circuit de protection de moteur et procédé de commande de circuit de protection de moteur
EP1744430A2 (fr) Dispositif pour la détection d'une surintensité dans un moteur pour un véhicule
CN205791499U (zh) 一种热插拔电源保护电路及其插件式监护仪
CN108923376A (zh) 一种可自恢复的过流关断保护方法及电路
CN109994987B (zh) 一种基于cpld的过流保护电路及其过流保护方法
US10806061B2 (en) Control method and apparatus for smart power component, storage medium and processor
CN106325458B (zh) 一种开关电源的开机自检电路
CN105207543B (zh) 无刷直流电机的模拟闭环调速装置及其方法
CN111220929B (zh) 可实现短路检测的控制电路及其短路检测方法
CN106452232A (zh) 一种直流双相风扇的驱动电路及驱动芯片
CN110134055A (zh) 自保护加热电路、美容仪、线路故障检测方法及装置
CN107144798B (zh) 异常检测电路和方法及开关电源
KR102220013B1 (ko) 신호 수신 회로 및 방법, 및 신호 검출 회로
CN206379719U (zh) 过流保护外围电路和用电设备
JP3734797B2 (ja) バックアップコンデンサの充電および放電フェーズを制御する方法
WO2023130797A1 (fr) Circuit et procédé de détection d'anomalie
CN107450627B (zh) 温度控制电路
WO2015172502A1 (fr) Circuit de surveillance et dispositif électronique
CN109842167B (zh) 一种电动汽车无线充电系统线圈保护电路及方法
CN104836192B (zh) 用于pwm调制型音频功放的输入短路保护电路
US9588528B2 (en) Inrush current suppression circuit and method for controlling when a load may be fully energized
US10890326B2 (en) Flame rectification circuit using operational amplifier
JP6116443B2 (ja) 受電装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17809568

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17809568

Country of ref document: EP

Kind code of ref document: A1