EP4317687A1 - Abschaltschutz, antriebs- und überdruckabschaltsysteme, wärmepumpenvorrichtung und elektrische vorrichtung - Google Patents

Abschaltschutz, antriebs- und überdruckabschaltsysteme, wärmepumpenvorrichtung und elektrische vorrichtung Download PDF

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Publication number
EP4317687A1
EP4317687A1 EP23190023.4A EP23190023A EP4317687A1 EP 4317687 A1 EP4317687 A1 EP 4317687A1 EP 23190023 A EP23190023 A EP 23190023A EP 4317687 A1 EP4317687 A1 EP 4317687A1
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EP
European Patent Office
Prior art keywords
signal
drive
control apparatus
turn
protection
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.)
Pending
Application number
EP23190023.4A
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English (en)
French (fr)
Inventor
Junchao ZHENG
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.)
GD Midea Heating and Ventilating Equipment Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
Original Assignee
GD Midea Heating and Ventilating Equipment Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
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Publication date
Application filed by GD Midea Heating and Ventilating Equipment Co Ltd, Hefei Midea Heating and Ventilating Equipment Co Ltd filed Critical GD Midea Heating and Ventilating Equipment Co Ltd
Publication of EP4317687A1 publication Critical patent/EP4317687A1/de
Pending legal-status Critical Current

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    • 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
    • F04B41/00—Pumping installations or systems specially adapted for elastic fluids
    • F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
    • 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
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/022—Stopping, starting, unloading or idling control by means of pressure
    • 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
    • F04B49/08—Regulating by delivery pressure
    • 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

Definitions

  • the present application relates to control technologies and, in particular to turn-off protection, driving, and overpressure turn-off systems, a heat pump apparatus, and an electrical device.
  • Compression apparatus including a compressor and a pressure vessel, where pressure in the pressure vessel is changed when the compressor is operating
  • Compression apparatus are important components of an air conditioning system and a heat pump system for working.
  • a system containing a compression apparatus if no measure is taken to turn off the compression apparatus when the system pressure is high, the system pressure will continue to rise, thereby generating danger.
  • An existing method of turning off the compression apparatus is collecting by a main control board a switch signal of the compression apparatus, outputting the signal by the main control board to a module board according to the switch signal, and controlling by the module board the compression device to be turned off.
  • This method of turning off the compression apparatus involves a lot of elements, has low response speed, and as long as any one element is damaged, a situation that the compression device cannot be turned off will occur, thereby leading to a serious consequence.
  • the present application provides turn-off protection, driving, and overpressure turn-off systems, a heat pump apparatus, and an electrical device, to improve a success rate of turning off a compression apparatus and improve safety factors of an air conditioning system and a heat pump system.
  • the present application provides a turn-off protection system, including:
  • the turn-off protection system further includes: a third control apparatus, configured to be connected to the first control apparatus and the pressure switch apparatus to output a third drive signal and further configured to stop outputting the third drive signal according to the pressure switch action signal, where the third drive signal is used for driving the first control apparatus to output the first drive signal.
  • a third control apparatus configured to be connected to the first control apparatus and the pressure switch apparatus to output a third drive signal and further configured to stop outputting the third drive signal according to the pressure switch action signal, where the third drive signal is used for driving the first control apparatus to output the first drive signal.
  • the turn-off protection system further includes: a signal output circuit, where an end of the signal output circuit is connected to the second control apparatus and the other end of the signal output circuit is connected to the drive apparatus.
  • the signal output circuit includes:
  • the signal output circuit further includes: a diode, where a positive electrode of the diode is connected to the collector of the second triode and a negative electrode of the diode is connected to the first pin.
  • the drive apparatus further includes a second pin connecting to a first feedback pin of the second control apparatus; and a pulse signal is transmitted to the first feedback pin through the second pin when the drive apparatus stops outputting the second drive signal.
  • the turn-off protection system further includes a pressure switch apparatus, the pressure switch apparatus includes:
  • the second control apparatus is further connected to the third control apparatus; the second control apparatus is configured to transmit a reset signal to the third control apparatus upon obtaining the pressure switch action signal and the first drive signal from the first control apparatus, and the reset signal is used to control the third control apparatus to stop outputting the third drive signal.
  • the first control apparatus includes N bridge arm pulse width modulation, PWM, circuits, and each bridge arm PWM circuit has a different on time; where N is an integer greater than 1.
  • each bridge arm PWM circuit includes a triode.
  • the first control apparatus includes an 8-channel buffer.
  • the turn-off protection system further includes a first protection apparatus and a second protection apparatus; one ends of the first protection apparatus and the second protection apparatus are both connected to the drive apparatus, and the other ends of the first protection apparatus and the second protection apparatus are both connected to the first control apparatus to buffer an output of the control apparatus.
  • the first protection apparatus includes:
  • the second protection apparatus includes:
  • the turn-off protection system further includes: a drive apparatus, configured to be connected to a compression apparatus when in use to output the second drive signal to the compression apparatus after receiving the first drive signal, where the second drive signal is used to drive the compression apparatus to operate.
  • the present application provides a heat pump apparatus, including the turn-off protection system provided in the first aspect, and further including:
  • the present application provides an electrical device, including the heat pump apparatus provided in the second aspect.
  • the present application provides a driving system, including the turn-off protection system as described in the first aspect, and further including: a drive apparatus, configured to be connected to the compression apparatus when in use to output the second drive signal to the compression apparatus after receiving the first drive signal outputted by the first control apparatus, so as to drive the compression apparatus to operate.
  • the present application provides an overpressure turn-off system, including the turn-off protection system as described in the first aspect, and further including: a pressure switch apparatus, configured to be turned off when a pressure of the system is detected to be overpressure, and output a pressure switch action signal.
  • the present embodiment provides a turn-off protection system including a first control apparatus and a second control apparatus.
  • the first control apparatus is configured to be in signal connection with the pressure switch apparatus to output a first drive signal and further configured to stop outputting the first drive signal according to a pressure switch action signal.
  • the pressure switch apparatus is configured to be turned off when a pressure of the system is detected to be overpressure and output the pressure switch action signal.
  • the second control apparatus is connected to the first control apparatus, and further connected to the drive apparatus of the compression apparatus when in use.
  • the second control apparatus is used to output a fault protection signal to the drive apparatus upon obtaining the pressure switch action signal and the first drive signal from the first control apparatus.
  • the fault protection signal is used to control the drive apparatus to stop outputting the second drive signal to the compression apparatus.
  • the control apparatus controls the drive apparatus of the compression apparatus to stop outputting a drive signal, so as to control the compression apparatus to be turned off.
  • the second control apparatus is further configured to control the drive apparatus to stop outputting a drive signal when the system is in overpressure.
  • the first control apparatus and the second control apparatus not only provide dual turn-off protection but also improve efficiency and success rate of turning off the compression apparatus, as well as improve safety factors of an air conditioning system and a heat pump system.
  • turn-off protection system 10 pressure switch apparatus 100; pressure detection switch 110; first control apparatus 200; PWM circuit 210; second control apparatus 300; drive apparatus 400; third control apparatus 500; signal output circuit 600; first protection apparatus 700; second protection apparatus 800; compression apparatus 20; first power supply 21; second power supply 22; heat pump apparatus 30; heat-exchange apparatus 31; electrical device 40; driving system 50; overpressure turn-off system 60
  • Compression apparatus including a compressor and a pressure vessel, where pressure in the pressure vessel is changed when the compressor is operating
  • Compression apparatus are important components of an air conditioning system and a heat pump system for working.
  • a system containing a compression apparatus if no measure is taken to turn off the compression apparatus when the system pressure is high, the system pressure will continue to rise, thereby generating danger.
  • An existing method of turning off the compression apparatus is collecting by a main control board a switch signal of the compression apparatus, outputting the signal by the main control board to a module board according to a switch signal, and controlling by the module board the compression device to be turned off.
  • This method of turning off the compression apparatus involves a lot of elements, has slow response speed, and as long as any one element is damaged, a situation that the compression device cannot be turned off will occur, thereby leading to a serious consequence.
  • the present application provides a turn-off protection system, a driving system, an overpressure turn-off system, a heat pump apparatus, and an electrical device.
  • the turn-off protection system includes a pressure switch apparatus, a first control apparatus, a drive apparatus, and a second control apparatus.
  • This pressure switch apparatus is turned off when a pressure of the system is detected to be overpressure and outputs a pressure switch action signal.
  • the first control apparatus is in signal connection with the pressure switch apparatus to output a first drive signal and is used for stopping outputting the first drive signal according to the pressure switch action signal.
  • the drive apparatus is connected to a compression apparatus to output a second drive signal to the compression apparatus after receiving the first drive signal, the second drive signal is used to drive the compression apparatus to operate.
  • the second control apparatus is connected to the first control apparatus and the drive apparatus so as to output a fault protection signal to the drive apparatus when the pressure switch action signal and the first drive signal are obtained from the first control apparatus, where the fault protection signal is used for controlling the drive apparatus to stop outputting the second drive signal.
  • the control apparatus controls the drive apparatus of the compression apparatus to stop outputting the drive signal, thereby controlling the compression apparatus to be turned off.
  • the second control apparatus is further used for controlling the drive apparatus to stop outputting the drive signal when the system is in overpressure.
  • the first control apparatus and the second control apparatus not only provide dual turn-off protection, but also improve efficiency and success rate of turning off the compression apparatus, as well as improve the safety factors of an air conditioning system and heat pump system.
  • some embodiments of the present application provide a turn-off protection system 10, where the turn-off protection system 10 is in signal connection with a pressure switch apparatus 100 when in use.
  • the pressure switch apparatus 100 is configured to be turned off when the system is detected to be overpressure and output a pressure switch action signal.
  • the pressure of the system is, for example, a pressure of an air conditioning system, or a pressure of part of the air conditioning system (for example, a pressure of air-conditioner indoor unit).
  • the pressure switch apparatus 100 When the system is operating normally (the system is not in overpressure), the pressure switch apparatus 100 may be in a normal closed state, and the pressure switch apparatus 100 is disconnected when the system is in overpressure.
  • the pressure switch apparatus 100 may be in a normal open state when the system is operating normally, and the pressure switch apparatus 100 is closed when the system is in overpressure.
  • the state of the pressure switch apparatus 100 is needed to be changed to a state opposite to a normal state.
  • the pressure switch apparatus 100 can be a switch of an external device to detect whether the system is in overpressure.
  • the turn-off protection system 10 includes a first control apparatus 200 and a second control apparatus 300.
  • the first control apparatus 200 is in signal connection with the pressure switch apparatus 100 when in use to output a first drive signal and is used for stopping outputting the first drive signal according to a pressure switch action signal, where the first drive signal is used for instructing a drive apparatus 400 of a compression apparatus 20 to drive the compression apparatus 20 to operate.
  • the drive apparatus 400 is connected to the compression apparatus 20, the drive apparatus 400 can be understood as a drive module of a compression apparatus.
  • the drive apparatus 400 is used for outputting a second drive signal to the compression apparatus 20 after receiving the first drive signal, the second drive signal is used for driving the compression apparatus 20 to operate. If there is no first drive signal, the drive apparatus 400 will not output the second drive signal and will not drive the compression apparatus 20 to operate.
  • the first control apparatus 200 is, for example, a logic chip, and mechanically triggered to stop outputting the first drive signal after receiving the pressure switch action signal.
  • the second control apparatus 300 is connected to the first control apparatus 200, and further connected to the drive apparatus 400 when in use, the second control apparatus 300 outputs a fault protection signal to the drive apparatus 400 upon obtaining the pressure switch action signal and the first drive signal from the first control apparatus 200.
  • This fault protection signal is used for controlling the drive apparatus 400 to stop outputting the second drive signal to the compression apparatus 20.
  • a purpose that the second control apparatus 300 outputs the fault protection signal to the drive apparatus 400 is to prevent a situation where the first control apparatus 300 does not stop outputting the first drive signal when the first control apparatus 200 have received the pressure switch action signal.
  • the drive apparatus 400 can be further controlled to stop outputting the second drive signal by inputting the fault protection signal to the drive apparatus 400.
  • the embodiments provide a turn-off protection system 10, including a first control apparatus 200 and a second control apparatus 300.
  • the first control apparatus 200 is in signal connection with the pressure switch apparatus 100 to output the first drive signal and is used for stopping outputting the first drive signal according to the pressure switch action signal.
  • the pressure switch apparatus 100 is to be turned off when the pressure of the system is detected to be overpressure and outputs the pressure switch action signal.
  • the second control apparatus 300 is connected to the first control apparatus 200, and further connected to the drive apparatus 400 of the compression apparatus 20 when in use, the second control apparatus 300 outputs a fault protection signal to the drive apparatus 400 upon obtaining the pressure switch action signal and the first drive signal from the first control apparatus 100.
  • the fault protection signal is used to control the drive apparatus 400 to stop outputting the second drive signal to the compression apparatus 20.
  • the control apparatus controls the drive apparatus 400 of the compression apparatus 20 to stop outputting a drive signal, thereby controlling the compression apparatus 20 to be turned off.
  • the second control apparatus 300 is further used for controlling the drive apparatus 400 to stop outputting drive signal when system is in overpressure.
  • the first control apparatus 200 and the second control apparatus 300 not only provide dual turn-off protection, but also improve efficiency and success rate of turning off the compression apparatus 20, and improve safety factors of an air conditioning system and a heat pump system.
  • a turn-off protection system 10 provided by some embodiments of the present application further includes a third control apparatus 500, where the third control apparatus 500 is connected to the first control apparatus 200 and the pressure switch apparatus 100 to output a third drive signal, the third drive signal is used to drive the first control apparatus 200 to output the first drive signal.
  • the third control apparatus 500 is further used to stop outputting the third drive signal according to the pressure switch action signal.
  • the second control apparatus 300 is connected to the pressure switch apparatus 100.
  • the second control apparatus 300 outputs a reset signal to the third control apparatus 500 according to the pressure switch action signal, the third control apparatus 500 is in signal connection with the first control apparatus 200, the third control apparatus 500 controls the first control apparatus 200 to stop outputting the first drive signal according to the pressure switch action signal.
  • a purpose that the second control apparatus 300 outputs the reset signal to the third control apparatus 500 is to prevent a situation where the first control apparatus 200 does not stop outputting the first drive signal when the first control apparatus 200 has received the pressure switch action signal; and to control the first control apparatus 200 to stop outputting the first drive signal through the third control apparatus 500.
  • the third control apparatus 500 is used to obtain the signal outputted by the first control apparatus 200 while obtaining the pressure switch action signal.
  • the reset signal is outputted to the third control apparatus 500.
  • the third control apparatus 500 stops outputting the third drive signal to the first control apparatus 200. More specifically, when the signal outputted by the first control apparatus 200 is determined as the first drive signal, the second control apparatus 300 outputs by a pin a fault signal of the first control apparatus 200 to the third control apparatus 500.
  • the third control apparatus 500 stops outputting the third drive signal to the first control apparatus 200 upon receiving the fault signal of the first control apparatus 200. Therefore, controlling the first control apparatus 200 to stop outputting the first drive signal by the third control apparatus 500 can be further ensured to turn off the compression apparatus 20.
  • the turn-off protection system 10 further includes a third control apparatus 500.
  • the second control apparatus 300 is used to output a reset signal to the third control apparatus 500 according to the pressure switch action signal
  • the third control apparatus 500 is used to control the first control apparatus 200 to stop outputting the first drive signal according to the reset signal.
  • the third control apparatus 500 can be used to further control the first control apparatus 200 to stop outputting the first drive signal, thereby improving the success rate of turning off the compression apparatus 20.
  • a turn-off protection system 10 provided by some embodiments of the present application further includes a signal output circuit 600.
  • One end of the signal output circuit 600 is connected to the second control apparatus 300, and the other end thereof is connected to the drive apparatus 400.
  • the second control apparatus 300 outputs the fault protection signal to the drive apparatus 400 through the signal output circuit 600.
  • the drive apparatus 400 also outputs a low-pulse feedback signal to the second control apparatus 300 through the signal output circuit 600.
  • the low-pulse feedback signal is used to indicate that the drive apparatus 400 has stopped outputting the second drive signal.
  • the fault protection signal is used to excite the signal output circuit 600 to transmit a high-level signal to the drive apparatus 400, so that the drive apparatus 400 stops outputting the second drive signal under an action of the high-level signal.
  • the high-level signal comes from a high-level power supply connected to the signal output circuit 600, the high-level power supply can be a built-in power supply in a module where the compression device 20 is located, and may be such as a 15V power supply.
  • the signal output circuit 600 shown in FIG. 3 is a schematic representation of the signal output circuit 600.
  • the signal output circuit 600 includes a first triode Q1 and a second triode Q2.
  • Abase electrode of the first triode Q 1 is connected to an output of the second control apparatus 300, and an emitter electrode of the first triode Q1 is grounded.
  • An emitter electrode of the second triode Q2 is connected to the first power supply 21, a base electrode of the second triode Q2 is connected to a collector of the first triode, and a collector of the second triode Q2 is connected to a first pin of the drive apparatus 400.
  • the first triode Q1 can be an NPN-type triode, and the second triode Q2 can be a PNP-type triode.
  • the second control apparatus 300 firstly outputs the fault protection signal to turn on the first triode Q1, and the emitter electrode of the second triode Q2 is connected to the first power supply 21. After the first triode Q1 is turned on, the second triode Q2 is turned on. Then, the first power supply 21 outputs a high-level signal to the drive apparatus 400, and the drive apparatus 400 stops outputting the second drive signal upon receiving the high-level signal.
  • the fault protection signal is used to turn on the first triode Q 1 and the second triode Q2, so that the drive apparatus 400 stops outputting the second drive signal after receiving by the first pin a voltage signal (i.e., the high-level signal described above) outputted by the first power supply 21.
  • the signal output circuit 600 further includes a diode D1, a positive electrode of the diode D1 is connected to the collector of the second triode, and a negative electrode of the diode D1 is connected to the first pin of the drive apparatus 400.
  • the diode D1 can filter out an impurity signal in the voltage signal (i.e., the high-level signal described above) outputted by the first power supply 21.
  • the signal output circuit 600 further includes a resistor R1, resistor R2, resistor R3, and resistor R4.
  • One end of the resistor R1 is connected to an output of the second control apparatus 300, and the other end of the resistor R1 is connected to the base electrode of the first triode Q1.
  • One end of the resistor R2 is connected to the collector of the first triode Q1, and the other end of the resistor R2 is connected to the base electrode of the second triode Q2.
  • One end of the resistor R3 is connected to the other end of the resistor R2; and the base electrode of the second triode Q2, and the other end of the resistor R3 is connected to an output of the first power supply 21.
  • One end of the resistor R4 is connected to the negative electrode of the diode D1, and the other end of the resistor R4 is connected to the first pin of the drive apparatus 400.
  • the function of the resistors R1, R2, R3, and R4 is to stabilize the transmission of signals, to improve a probability that the drive apparatus 400 successfully receives the voltage signal (i.e., the high-level signal as described above) outputted by the first power supply 21, thereby improving the probability of turning off the compression apparatus 20.
  • the drive apparatus 400 further includes a second pin, the second pin is connected to a first feedback pin of the second control apparatus 300, and a power supply (3.3V power supply as shown in FIG. 3 ) is further provided on a connection link.
  • a pulse signal is transmitted to the first feedback pin through the second pin. If the second control apparatus 300 does not receive the pulse signal, the fault protection signal can be transmitted to the drive apparatus 400 again so as to trigger the drive apparatus 400 again to stop outputting the second drive signal. In this way, the success rate of controlling the drive apparatus 400 to stop outputting the second drive signal is improved through pulse signal feedback, thereby improving the success rate of turning off the compression apparatus 20 when the system is in overpressure.
  • Multiple resistors (two resistors are exemplarily shown in FIG. 3 ) can be further provided on a line connecting the second pin of the drive apparatus 400 to the first feedback pin of the second control apparatus 300, the multiple resistors are used to stabilize the signal outputted by the drive apparatus 400 and filter out some of impurity signals.
  • the turn-off protection system 10 further includes a signal output circuit 600.
  • the signal output circuit 600 is provided with a first triode Q1 and a second triode Q2 that can be sequentially turned on.
  • the base electrode of the first triode Q1 is connected to the output of the second control apparatus 300, and the emitter electrode of the first triode Q1 is grounded.
  • the emitter electrode of the second triode Q2 is connected to the first power supply 21, the base electrode of the second triode Q2 is connected to the collector of the first triode, and the collector of the second triode Q2 is connected to the first pin of the drive apparatus 400.
  • the fault protection signal turning on the first triode Q1 causes the second triode Q2 to be turned on, so that the drive apparatus 400 stops outputting the second drive signal after receiving by the first pin the voltage signal outputted by the first power supply 21.
  • the signal output circuit 600 the success rate of controlling the drive apparatus 400 to stop outputting the second drive signal can be improved, thereby improving the success rate of turning off the compression apparatus 20 when the system is in overpressure.
  • a turn-off protection system 10 provided by some embodiments of the present application further includes the pressure switch apparatus 100 described above.
  • the pressure switch apparatus 100 includes a pressure detection switch 110.
  • one end of the pressure detection switch 110 is connected to an enable pin of the first control apparatus 200, and further connected to a pin of the third control apparatus 500, as well as connected to a second power supply 22.
  • the second power supply 22 may be a built-in power supply in a module board where the compression apparatus 20 is located, and may be, for example, a 3.3 V power supply.
  • the other end of the pressure detection switch 110 is grounded.
  • the enable pin of the first control apparatus 200 is grounded, and the pin of the second control apparatus 300 and the pin of the third control apparatus 500 cannot receive a voltage signal, that is, the pin of the second control apparatus 300 and the pin of the third control apparatus 500 cannot receive the pressure switch action signal.
  • the voltage signal that is outputted by the second power supply 22 and received by the enable pin of the first control apparatus 200 is the pressure switch action signal.
  • the voltage signal that is outputted by the second power supply 22 and received by the second control apparatus 300 and the third control apparatus 500 is the pressure switch action signal.
  • the pressure switch apparatus 100 further includes a resistor R5, resistor R6, resistor R7, and resistor R8.
  • resistor R5 is connected to the second power supply 22, and the other end of the resistor R5 is connected to one end of the pressure detection switch 110, and further connected to the enable pin of the first control apparatus 200.
  • One end of the resistor R6 is connected to the second power supply 22, and the other end of the resistor R6 is connected to the other end of the resistor R5, and further connected to the enable pin of the first control apparatus 200.
  • the resistor R5 and the resistor R6 are in a parallel state.
  • a function of the resistors R5 and R6 is to stabilize a voltage signal outputted by the second power supply 22 when the pressure detection switch 110 is turned off due to overpressure of the system, and filter out some of impurity signals in the voltage signal.
  • One end of the resistor R7 is connected to one end of the pressure detection switch 110, and further connected to the enable pin of the first control apparatus 200, and the other end of the resistor R7 is connected to the pin of the second control apparatus 300.
  • One end of the resistor R8 is connected to one end of the resistor R7, and further connected to the enable pin of the first control apparatus 200, and the other end of the resistor R8 is connected to another pin of the second control apparatus 300.
  • a function of the resistors R7 and R8 is to stabilize the voltage signal outputted by the second power supply 22 and filter out some of impurity signals in the voltage signal when the pressure detection switch 110 is turned off due to overpressure of the system.
  • the pressure switch apparatus 100 in the turn-off protection system 10 include a pressure detection switch 110, the pressure detection switch 110 is connected to a second power supply 22, and is further connected to the first control apparatus 200, the second control apparatus 300, and the third control apparatus 500, respectively.
  • the pressure detection switch 110 When the system is not in overpressure, the pressure detection switch 110 is in a normally closed state, and the enable pin of the first control apparatus 200 does not receive the pressure switch action signal.
  • neither the second control apparatus 300 nor the third control apparatus 500 receives the pressure switch action signal.
  • the pressure detection switch 110 is turned off, the voltage signal that is outputted by the second power supply 22 and received by first control apparatus 200, the second control apparatus 300 and the third control apparatus 500 is the pressure switch action signal.
  • the first control apparatus 200 includes N bridge arm pulse width modulation, PWM, circuits 210, and the number of N is determined by the requirements of the drive apparatus 400.
  • FIG. 5 shows that the first control apparatus 200 includes two bridge arm PWM circuits 210, namely an upper bridge arm 3-channel PWM circuit 210 and a lower bridge arm 3-channel PWM circuit 210.
  • Each bridge arm PWM circuit 210 includes a triode, and the first control apparatus 200 includes a triode array.
  • the N bridge arm PWM circuits 210 are all driven to be turned on by the third drive signal outputted by the third control apparatus 500.
  • conduction time of each bridge arm PWM circuit 210 in the N bridge arm PWM circuits 210 can be different.
  • the third drive signal outputted by the third control apparatus 500 is a pulse signal
  • the first drive signal outputted by the first control apparatus 200 is also a pulse signal.
  • the first control apparatus 200 can be an 8-channel buffer.
  • the turn-off protection system further includes a first protection apparatus 700 and a second protection apparatus 800.
  • One ends of the first protection apparatus 700 and the second protection apparatus 800 are both connected to the drive apparatus 400, and the other ends of the first protection apparatus 700 and the second protection apparatus 800 are both connected to the first control apparatus 200.
  • the first protection apparatus 700 and the second protection apparatus 800 are both used to buffer the output of the first control apparatus 200.
  • the first protection apparatus 700 includes a first resistor R9 and a first capacitor C1.
  • One end of the first resistor R9 is connected to a bridge arm PWM circuit 210 (the upper bridge arm 3-channel PWM circuit 210 shown in FIG. 5 ), and the other end of the first resistor R9 is connected to the drive apparatus 400.
  • One end of the first capacitor C1 is connected to the other end of the first resistor R9, and the other end of the first capacitor C1 is grounded.
  • the first resistor R9 and the first capacitor C1 can stabilize and buffer the first drive signal outputted by the upper bridge arm 3-channel PWM circuit 210.
  • the second protection apparatus 800 includes a second resistor R10, a third resistor R11, and a second capacitor C2.
  • One end of the second resistor R10 is connected to a bridge arm PWM circuit 210 (the lower bridge arm 3-channel PWM circuit 210 shown in FIG. 5 ), and the other end of the second resistor R10 is connected to the drive apparatus 400.
  • One end of the third resistor R11 is connected to one end of the second resistor R10, and the other end of the third resistor R11 is grounded.
  • One end of the second capacitor C2 is connected to the other end of the second resistor R10, and the other end of the second capacitor C2 is grounded.
  • the second resistor R10, the third resistor R11, and the second capacitor C2 can stabilize and buffer the first drive signal outputted by the lower bridge arm 3-channel PWM circuit 210.
  • the resistance values of the first resistor R9, the second resistor R10, and the third resistor R11 can be selected according to actual needs, and these embodiments have no limitation on this.
  • the specifications of the first capacitor C1 and the second capacitor C2 can be selected according to actual needs, and these embodiments have no limitation on this.
  • a circuit which is used for transmitting the output signal of the first control apparatus 200 and is between the first control apparatus 200 and the second control apparatus 300, includes a resistor R12 and a capacitor C3.
  • One end of the resistor R12 is connected to the output of the first control apparatus 200 (for example, connected to the lower bridge arm PWM circuit 210 shown in FIG. 5 ), and the other end of the resistor R12 is connected to the pin of the second control apparatus 300.
  • One end of the capacitor C3 is connected to one end of the resistor R12, and the other end of the capacitor C3 is grounded. The resistor R12 and the capacitor C3 can stabilize the signal outputted by the first control apparatus 200, and can filter out an impurity signal in the signal outputted by the first control apparatus 200.
  • the first control apparatus 200 controls the drive apparatus 400 of the compression apparatus 20 to stop outputting a drive signal when the system is in overpressure, thereby controlling the compression apparatus 20 to be turned off.
  • overpressure protection there is no need to make software logic judgments. It is to use a signal to directly drive hardware to perform turn-off, fewer elements are needed, the response is faster and safer, the efficiency and success rates of turning off the compression apparatus 20 are improved, and the safety factors of the air conditioning system and heat pump system are improved.
  • the type of power supply in the turn-off protection system provided in the above embodiments of the present application is not limited, and the power supply can be a unidirectional power supply.
  • a turn-off protection system 10 provided by some embodiments of the present application further includes the drive apparatus 400.
  • the model and specification of the drive apparatus 400 can be selected according to actual needs, and these embodiments have no limitation on this.
  • the drive apparatus 400 determines the number of PWM circuits 210 in the first control apparatus 200.
  • some embodiments of the present application further provide a heat pump apparatus 30, where the heat pump apparatus includes the turn-off protection system 10 provided by any one of the above embodiments, as well as a compression apparatus 20 and a heat-exchange apparatus 31 for heating liquid water.
  • the heat pump apparatus 30, such as a heat pump swimming pool machine, is generally installed at an edge of a swimming pool to heat the water in the swimming pool.
  • the compression apparatus 20 can be provided inside or outside of the heat-exchange apparatus 31.
  • some embodiments of the present application further provide an electrical device 40, where the electrical device 40 includes the heat pump apparatus 30 as provided in any one of the above embodiments, and may further include other apparatus, which is not limited in these embodiments.
  • some embodiments of the present application provide a driving system 50, where the driving system 50 includes the turn-off protection system 10 as provided in any one of the above embodiments, and further includes a drive apparatus 400.
  • the drive apparatus 400 is connected to the compression apparatus 20 when in use, so as to output the second drive signal to the compression apparatus 20 after receiving the first drive signal outputted by the first control apparatus 200, and then drive the compression apparatus 20 to operate.
  • the model and specification of the drive apparatus 400 can be selected according to actual needs, and these embodiments have no limitation on this.
  • the number of the PWM circuits 210 in the first control apparatus 200 is determined by the drive apparatus 400.
  • the driving system 50 may further include the pressure switch apparatus 100 as described above.
  • some embodiments of the present application provide an overpressure turn-off system 60, where the overpressure turn-off system 60 includes the turn-off protection system 10 provided in any one of the above embodiments, and further includes a pressure switch apparatus 100, where the pressure switch apparatus 100 is turned off when the system is detected to be overpressure, and outputs a pressure switch action signal.
  • the overpressure turn-off system 60 can further include the drive apparatus 400 as described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Air Conditioning Control Device (AREA)
EP23190023.4A 2022-08-05 2023-08-07 Abschaltschutz, antriebs- und überdruckabschaltsysteme, wärmepumpenvorrichtung und elektrische vorrichtung Pending EP4317687A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210938775.8A CN115076083A (zh) 2022-08-05 2022-08-05 关断保护、驱动及过压关断系统、热泵装置及电器设备

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EP4317687A1 true EP4317687A1 (de) 2024-02-07

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170037842A1 (en) * 2015-08-07 2017-02-09 Max Co., Ltd. Air compressor
EP3450882A1 (de) * 2017-08-29 2019-03-06 LG Electronics Inc. Schaltung zum sperren des betriebs eines kompressors
KR20190072893A (ko) * 2017-12-18 2019-06-26 엘지전자 주식회사 압축기 보호 기능을 가지는 공기 조화기

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170037842A1 (en) * 2015-08-07 2017-02-09 Max Co., Ltd. Air compressor
EP3450882A1 (de) * 2017-08-29 2019-03-06 LG Electronics Inc. Schaltung zum sperren des betriebs eines kompressors
KR20190072893A (ko) * 2017-12-18 2019-06-26 엘지전자 주식회사 압축기 보호 기능을 가지는 공기 조화기

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