WO2017175273A1 - Protective device for compressor - Google Patents

Protective device for compressor Download PDF

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Publication number
WO2017175273A1
WO2017175273A1 PCT/JP2016/061016 JP2016061016W WO2017175273A1 WO 2017175273 A1 WO2017175273 A1 WO 2017175273A1 JP 2016061016 W JP2016061016 W JP 2016061016W WO 2017175273 A1 WO2017175273 A1 WO 2017175273A1
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WO
WIPO (PCT)
Prior art keywords
compressor
state
signal
switch
power supply
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PCT/JP2016/061016
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French (fr)
Japanese (ja)
Inventor
覚 菊川
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三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2018510025A priority Critical patent/JPWO2017175273A1/en
Priority to PCT/JP2016/061016 priority patent/WO2017175273A1/en
Publication of WO2017175273A1 publication Critical patent/WO2017175273A1/en

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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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Definitions

  • the present invention relates to a compressor protection device for stopping a compressor when the refrigerant pressure becomes abnormally high.
  • a conventional protection device for stopping the compressor when the refrigerant circuit becomes abnormally high pressure inputs a high-pressure abnormality detection signal of a high-pressure switch (HPS: High Pressure Sensors) attached to the refrigerant circuit to the microcomputer.
  • HPS High Pressure Sensors
  • the main power supply relay that supplies power to the compressor is shut off and stopped by a high-pressure abnormality detection signal of a high-pressure switch attached to the refrigerant circuit (see, for example, Patent Document 1).
  • the conventional protection device that stops the compressor when the refrigerant circuit becomes abnormal in high pressure detects that the microcomputer has become abnormal in high pressure and stops the output of the compressor drive signal, causing the microcomputer to malfunction.
  • the compressor drive signal cannot be stopped, there is a problem that the compressor continues to operate.
  • Patent Document 1 in order to shut off the power supply of the compressor with a relay by a high voltage abnormality detection signal, a relay having a large contact capacity must be used to cut off a large current flowing through the compressor. There were problems such as increase in size and cost.
  • the present invention has been made in view of the above, and an object of the present invention is to obtain a compressor protection device that can reliably stop a compressor when a high-pressure abnormality occurs in a refrigerant circuit.
  • the present invention provides a high-pressure switch that detects a high-pressure abnormality of a refrigerant circuit, and supplies a power signal when the high-pressure switch does not detect a high-pressure abnormality.
  • Auxiliary switch that cuts off the supply of power supply signal when an abnormality is detected, and has an abnormal state and a normal state, and transitions from a normal state to an abnormal state when it changes from a state where a power supply signal is supplied to a state where it is not supplied And a holding circuit.
  • the present invention provides a control unit that outputs a compressor drive signal that instructs driving of the compressor when the holding circuit is in a normal state, and a compressor drive signal that is output by the control unit is supplied with a power signal. And a power element module for driving the compressor based on the compressor drive signal relayed by the buffer.
  • the compressor protection device has an effect of reliably stopping the compressor when a high-pressure abnormality occurs in the refrigerant circuit.
  • FIG. 1 is an external view of an air conditioner according to Embodiment 1 of the present invention.
  • External view of the heat pump type hot water heater according to the first embodiment 1 is a block diagram showing a configuration of a compressor and a compressor control circuit according to a first embodiment. The figure which shows an example of the circuit structure of the protection apparatus of the compressor concerning Embodiment 1.
  • FIG. 3 is a diagram illustrating an example of another circuit configuration of the semiconductor switch according to the first embodiment;
  • FIG. 1 is an external view of an air conditioner 100 according to Embodiment 1 of the present invention.
  • the air conditioner 100 includes an indoor unit 9, an outdoor unit 10 connected to the indoor unit 9, and a wireless remote controller 11 that operates the indoor unit 9 and the outdoor unit 10.
  • the outdoor unit 10 is mounted with a compressor 1 to be described later.
  • FIG. 2 is an external view of the heat pump type water heater 200 according to the first embodiment.
  • the heat pump hot water heater 200 includes a tank unit 12, a heat pump hot water supply unit 13 connected to the tank unit 12, a kitchen remote controller 14, and a bathroom remote controller 15.
  • a heat pump type hot water supply unit 13 that is an outdoor unit of the heat pump type hot water supply apparatus 200 is mounted with a compressor 1 described later, and is operated by a kitchen remote controller 14 and a bathroom remote controller 15.
  • FIG. 3 is a block diagram of the configuration of the compressor 1 and the compressor control circuit according to the first embodiment.
  • the outdoor unit 10 and the heat pump hot water supply unit 13 are mounted with the compressor 1 and the compressor control circuit shown in FIG.
  • the compressor control circuit includes a compressor protection device 50 described later.
  • the compressor control circuit of FIG. 3 includes a smoothing capacitor 17 for smoothing the rectified voltage, and an inrush current prevention for suppressing an inrush current flowing into the smoothing capacitor 17 when an AC voltage is supplied from the commercial power supply 16.
  • a smoothing capacitor 17 for smoothing the rectified voltage
  • an inrush current prevention for suppressing an inrush current flowing into the smoothing capacitor 17 when an AC voltage is supplied from the commercial power supply 16.
  • the inrush current prevention relay 19 that becomes a path for turning on the contact by the control from the microcomputer 2 after the charge is sufficiently accumulated in the smoothing capacitor 17 and bypassing the inrush current prevention resistor 18, and the commercial power supply 16.
  • a diode bridge 20 that rectifies the AC voltage.
  • the inrush current prevention relay 19 is controlled by a soft start signal output from the microcomputer 2.
  • Compressor drive signal for instructing driving of the compressor 1 is output from the microcomputer 2 which is a control unit, and is input to the power element module 4 via the line buffer IC 3 for transmitting the compressor drive signal.
  • the line buffer IC3 is a buffer that relays the compressor drive signal. Based on this compressor drive signal, the power element module 4 outputs a three-phase power source to drive the compressor 1.
  • the voltage detection circuit 22 detects the potential difference and transmits it to the microcomputer 2 as a voltage signal.
  • the microcomputer 2 converts the voltage signal received from the voltage detection circuit 22 into compressor current information, and performs operation control and protection control of the compressor 1 based on the compressor current information.
  • a display unit 23 is connected to the microcomputer 2, and the display unit 23 displays an operating state and whether or not an abnormality has occurred.
  • a memory 24 is connected to the microcomputer 2, and information necessary for operation control and protection control is stored in the memory 24.
  • the microcomputer 2 reads information from the memory 24 and performs control. Further, the microcomputer 2 records in the memory 24 information collected during operation and information when an abnormality occurs.
  • a high-pressure switch 5 is attached to a location where the refrigerant circuit is at a high pressure, such as a refrigerant pipe (not shown).
  • the high-pressure switch 5 detects that the refrigerant pipe has a high-pressure abnormality when the inside of the refrigerant pipe becomes equal to or higher than a certain pressure.
  • the semiconductor switch 7 as an auxiliary switch is provided between the line buffer IC 3 and the DC 5V power source 6.
  • the high pressure switch 5 turns off the semiconductor switch 7 when detecting that a high pressure abnormality has occurred in the refrigerant pipe.
  • the microcomputer 2 is notified through the holding circuit 8 that a high voltage abnormality has occurred, and the supply of the power signal from the DC 5V power source 6 to the line buffer IC 3 is cut off to supply power. Stops.
  • FIG. 4 is a diagram illustrating an example of a circuit configuration of the compressor protection device 50 according to the first embodiment.
  • the compressor protection device 50 is included in the compressor control circuit shown in FIG. 3, and includes a microcomputer 2, a line buffer IC 3, a power element module 4, a high voltage switch 5, a DC 5V power source 6, and a photo.
  • the semiconductor switch 7 comprised with the coupler, the holding circuit 8, and DC12V power supply 25 are provided.
  • a photodiode 31 which is a light emitting element and a phototransistor 32 which is a light receiving element are housed inside the photocoupler constituting the semiconductor switch 7, inside the photocoupler constituting the semiconductor switch 7, a photodiode 31 which is a light emitting element and a phototransistor 32 which is a light receiving element are housed.
  • the phototransistor 32 is turned on to supply a power signal from the DC 5V power source 6 to the line buffer IC 3, and the high voltage switch 5 detects the high voltage abnormality. In this case, the phototransistor 32 is turned off, and the supply of the power supply signal from the DC5V power supply 6 to the line buffer IC3 is cut off.
  • the holding circuit 8 has an abnormal state indicating that the refrigerant circuit is abnormal in high pressure and a normal state indicating that the refrigerant circuit is not abnormal in high pressure.
  • the microcomputer 2 uses a signal indicating either state as high-pressure information. Output to.
  • a specific example of the holding circuit 8 is a flip-flop circuit, which includes a set terminal 81 and a reset terminal 82, and can be changed from a normal state to an abnormal state by input to the set terminal 81, and by input to the reset terminal 82. It is possible to change from an abnormal state to a normal state.
  • the phototransistor 32 When the phototransistor 32 is in the on state, a power signal from the DC 5 V power source 6 is supplied to the set terminal 81.
  • the holding circuit 8 is in a normal state, if the power supply signal from the DC5V power supply 6 is changed to a state where it is not supplied, the holding circuit 8 shifts from a normal state to an abnormal state.
  • the microcomputer 2 determines whether or not to output a compressor drive signal based on the output of the holding circuit 8. Specifically, when the holding circuit 8 is in a normal state, the microcomputer 2 outputs a compressor drive signal.
  • the line buffer IC3 relays the compressor drive signal when the power signal is supplied to the Vcc terminal which is the power supply terminal, and stops the operation and relays the compressor drive signal when the power signal is not supplied to the Vcc terminal. do not do.
  • the contact of the high pressure switch 5 is closed when it is not a normal high pressure abnormality.
  • a current flows from the DC 12 V power supply 25 to the photodiode 31 via the high voltage switch 5.
  • the phototransistor 32 is turned on by the light emission of the photodiode 31, and a power supply signal is supplied from the DC5V power supply 6, and DC5V is supplied to the Vcc terminal of the line buffer IC3.
  • a DC5V voltage is applied from the DC5V power supply 6 to the set terminal 81 of the holding circuit 8.
  • the holding circuit 8 to which the power supply signal is supplied is in a normal state, and outputs high voltage information of High (DC 5 V) indicating the normal state to the microcomputer 2.
  • the microcomputer 2 can recognize that the pressure of the refrigerant is within the normal range, and can output a compressor drive signal for driving the compressor 1.
  • the compressor 1 When the compressor 1 operates, the pressure of the discharge side refrigerant of the compressor 1 increases. When there is an abnormality such as clogging of the refrigerant pipe and the pressure in the refrigerant pipe rises and exceeds the set value of the high pressure switch 5, the contact of the high pressure switch 5 that detected the abnormality is turned off. Then, no current flows from the DC12V power supply 25 to the photodiode 31, and the phototransistor 32 is turned off. Then, the DC5V power supply signal is not supplied from the DC5V power supply 6 to the Vcc terminal of the line buffer IC3, and the line buffer IC3 cannot operate. As a result, the line buffer IC 3 does not relay the compressor drive signal output from the microcomputer 2 to the power element module 4.
  • an abnormality such as clogging of the refrigerant pipe and the pressure in the refrigerant pipe rises and exceeds the set value of the high pressure switch 5
  • the contact of the high pressure switch 5 that detected the abnormality is turned off. Then,
  • the power element module 4 stops outputting the three-phase voltage that drives the compressor 1.
  • the phototransistor 32 is turned off, the power supply from the DC5V power supply 6 is cut off, so that the input to the set terminal 81 of the holding circuit 8 also changes from DC5V to 0V.
  • the holding circuit 8 changes from the normal state to the abnormal state, and the high voltage information output from the holding circuit 8 to the microcomputer 2 changes from High (DC5V) to Low (0V) indicating the abnormal state. 2 can recognize that a high-pressure abnormality has occurred, and can perform control to stop the output of the compressor drive signal.
  • the pressure in the refrigerant pipe decreases, so when the pressure in the refrigerant pipe becomes equal to or lower than the return pressure of the high pressure switch 5, the contact of the pressure switch 5 is switched from off to on.
  • the voltage supplied to the set terminal 81 of the holding circuit 8 from the power supply signal is also changed from 0V to DC5V.
  • the output of the holding circuit 8 remains Low (0 V) indicating the abnormal state. Therefore, the microcomputer 2 maintains the state when the high pressure abnormality occurs, and remains in a state where the output of the compressor drive signal is stopped.
  • the contact of the high voltage switch 5 is returned to ON, and the reset signal which is a low (0V) pulse signal from the microcomputer 2 to the reset terminal 82 of the holding circuit 8 Must be output.
  • the holding circuit 8 can be shifted from the abnormal state to the normal state.
  • the holding circuit 8 shifts to a normal state, and the high voltage information from the holding circuit 8 to the microcomputer 2 returns from Low (0 V) to High (DC 5 V) indicating the normal state.
  • the microcomputer 2 can output a compressor drive signal.
  • the condition under which the microcomputer 2 can output the reset signal is set to n minutes after the compressor 1 is stopped (n is a predetermined number), and the pressure in the refrigerant pipe is sufficiently reduced. It may be when the operation of resetting the abnormality occurrence state is performed from the wireless remote controller 11, the kitchen remote controller 14, or the bathroom remote controller 15.
  • FIG. 5 is a diagram illustrating an example of another circuit configuration of the semiconductor switch 7 according to the first embodiment.
  • the semiconductor switch 7 may be a circuit using a transistor without using a photocoupler.
  • the semiconductor switch 7 can also use a field effect transistor.
  • the compressor protection device 50 is configured such that when the high pressure switch 5 is activated due to an abnormally high pressure in the refrigerant piping, the compressor drive signal from the microcomputer 2 by the semiconductor switch 7. Sends an instruction to the holding circuit 8 so as not to go to the power element module 4, and at the same time, the power of the line buffer IC3 is cut off.
  • the compressor can be surely secured by inexpensive means without going through the microcomputer 2 that may cause malfunction and without interrupting the power supply line to the compressor 1. 1 can be stopped.
  • the compressor protection device 50 according to the first embodiment uses the inexpensive semiconductor switch 7 and the line buffer IC 3, there is an effect that it is possible to reduce the size and the cost.
  • the compressor protection device 50 ensures that the compressor drive signal is received at the line buffer IC3. The operation of the compressor 1 can be avoided by shutting off.
  • the line buffer IC is provided with a selection terminal for selecting ON or OFF of the buffer function, and the buffer output is turned ON or OFF by the high voltage information from the holding circuit 8, the line buffer IC is faulty.
  • the compressor protection device 50 can reliably block the compressor drive signal at the portion of the line buffer IC3.
  • the line buffer IC3 stops operating if the operating pressure of the high pressure switch 5 is reached, so the compressor 1 stops and starts when the pressure is below the return pressure. Therefore, even if the stop and return are repeated, the refrigerant pipe does not become dangerous due to high pressure. That is, since the start control is not performed with the compressor drive signal, the compressor 1 cannot be started even if the compressor drive signal is output in the high pressure state, so that the refrigerant pipe is surely in a dangerous state due to the high pressure. It becomes possible to prevent.
  • the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

Abstract

A protective device (50) for a compressor, provided with: a high pressure switch (5) for detecting a high-pressure abnormality in a refrigerant circuit; an auxiliary switch (7) for supplying a power supply signal when a high-pressure abnormality is not being detected by the high-pressure switch (5), and cutting off the supply of the power supply signal when the high-pressure switch (5) detects a high-pressure abnormality; a holding circuit (8) having an abnormality state and a normality state, and shifting from the normality state to the abnormality state when there is a change from a state in which the power supply signal is being supplied to a state in which the power supply signal is not being supplied; a control unit (2) for outputting a compressor drive signal, which indicates that a compressor is to be driven, when the holding circuit (8) is in the normality state; a buffer (3) for relaying the compressor drive signal outputted by the control unit (2) if the power supply signal is being supplied, and not relaying the compressor drive signal if the power supply signal is not being supplied; and a power element module (4) for driving the compressor on the basis of the compressor drive signal relayed by the buffer (3).

Description

圧縮機の保護装置Compressor protector
　本発明は、冷媒の圧力が異常に高くなった場合に圧縮機を停止させるための圧縮機の保護装置に関する。 The present invention relates to a compressor protection device for stopping a compressor when the refrigerant pressure becomes abnormally high.
　冷媒回路が異常高圧となった場合に圧縮機を停止させるための従来の保護装置は、冷媒回路に取り付けた高圧スイッチ（ＨＰＳ：Ｈｉｇｈ　Ｐｒｅｓｓｕｒｅ　Ｓｅｎｓｏｒｓ）の高圧異常検出信号をマイクロコンピュータに入力し、マイクロコンピュータが出力している圧縮機駆動信号を停止させている。 A conventional protection device for stopping the compressor when the refrigerant circuit becomes abnormally high pressure inputs a high-pressure abnormality detection signal of a high-pressure switch (HPS: High Pressure Sensors) attached to the refrigerant circuit to the microcomputer. The compressor drive signal output by the computer is stopped.
　また、冷媒回路に取り付けた高圧スイッチの高圧異常検出信号により圧縮機に電源を供給する主電源リレーを遮断して停止させている（例えば、特許文献１参照）。 Also, the main power supply relay that supplies power to the compressor is shut off and stopped by a high-pressure abnormality detection signal of a high-pressure switch attached to the refrigerant circuit (see, for example, Patent Document 1).
特開２０１４－２７７３４号公報JP 2014-27734 A
　冷媒回路が高圧異常となった場合に圧縮機を停止させる従来の保護装置は、マイクロコンピュータが高圧異常となったことを検出して圧縮機駆動信号出力を停止させるため、マイクロコンピュータが誤動作を起こし、圧縮機駆動信号を停止できない場合は圧縮機が運転を継続してしまう問題点があった。 The conventional protection device that stops the compressor when the refrigerant circuit becomes abnormal in high pressure detects that the microcomputer has become abnormal in high pressure and stops the output of the compressor drive signal, causing the microcomputer to malfunction. When the compressor drive signal cannot be stopped, there is a problem that the compressor continues to operate.
　また、特許文献１のように高圧異常検出信号により圧縮機の電源をリレーで遮断するには、圧縮機に流れる大電流を遮断するために接点容量の大きなリレーを使用しなければならず、リレーの大型化、コストアップといった問題点があった。 Further, as in Patent Document 1, in order to shut off the power supply of the compressor with a relay by a high voltage abnormality detection signal, a relay having a large contact capacity must be used to cut off a large current flowing through the compressor. There were problems such as increase in size and cost.
　本発明は、上記に鑑みてなされたものであって、冷媒回路の高圧異常が発生した場合に、確実に圧縮機を停止させることができる圧縮機の保護装置を得ることを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to obtain a compressor protection device that can reliably stop a compressor when a high-pressure abnormality occurs in a refrigerant circuit.
　上述した課題を解決し、目的を達成するために、本発明は、冷媒回路の高圧異常を検出する高圧スイッチと、高圧スイッチが高圧異常を検出しないときに電源信号を供給し、高圧スイッチが高圧異常を検出したときに電源信号の供給を遮断する補助スイッチと、異常状態と正常状態とを有し、電源信号が供給されている状態から供給されない状態に変化すると正常状態から異常状態に移行する保持回路と、を備えることを特徴とする。さらに、本発明は、保持回路が正常状態であるときに圧縮機の駆動を指示する圧縮機駆動信号を出力する制御部と、制御部が出力する圧縮機駆動信号を、電源信号が供給されている場合に中継し、電源信号が供給されない場合に中継しないバッファと、バッファにより中継された圧縮機駆動信号に基づいて圧縮機を駆動するパワー素子モジュールと、を備えることを特徴とする。 In order to solve the above-described problems and achieve the object, the present invention provides a high-pressure switch that detects a high-pressure abnormality of a refrigerant circuit, and supplies a power signal when the high-pressure switch does not detect a high-pressure abnormality. Auxiliary switch that cuts off the supply of power supply signal when an abnormality is detected, and has an abnormal state and a normal state, and transitions from a normal state to an abnormal state when it changes from a state where a power supply signal is supplied to a state where it is not supplied And a holding circuit. Furthermore, the present invention provides a control unit that outputs a compressor drive signal that instructs driving of the compressor when the holding circuit is in a normal state, and a compressor drive signal that is output by the control unit is supplied with a power signal. And a power element module for driving the compressor based on the compressor drive signal relayed by the buffer.
　本発明に係る圧縮機の保護装置は、冷媒回路の高圧異常が発生した場合に、確実に圧縮機を停止させることができるという効果を奏する。 The compressor protection device according to the present invention has an effect of reliably stopping the compressor when a high-pressure abnormality occurs in the refrigerant circuit.
本発明の実施の形態１にかかる空気調和機の外観図1 is an external view of an air conditioner according to Embodiment 1 of the present invention. 実施の形態１にかかるヒートポンプ式給湯機の外観図External view of the heat pump type hot water heater according to the first embodiment 実施の形態１にかかる圧縮機および圧縮機制御回路の構成を示すブロック図1 is a block diagram showing a configuration of a compressor and a compressor control circuit according to a first embodiment. 実施の形態１にかかる圧縮機の保護装置の回路構成の一例を示す図The figure which shows an example of the circuit structure of the protection apparatus of the compressor concerning Embodiment 1. 実施の形態１にかかる半導体スイッチの別の回路構成の例を示す図FIG. 3 is a diagram illustrating an example of another circuit configuration of the semiconductor switch according to the first embodiment;
　以下に、本発明の実施の形態に係る圧縮機の保護装置を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Hereinafter, a compressor protection device according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.
実施の形態１．
　図１は、本発明の実施の形態１にかかる空気調和機１００の外観図である。空気調和機１００は、室内機９と、室内機９に接続された室外機１０と、室内機９および室外機１０を操作するワイヤレスリモートコントローラ１１と、を備える。室外機１０は、後述する圧縮機１を実装している。 Embodiment 1 FIG.
FIG. 1 is an external view of an air conditioner 100 according to Embodiment 1 of the present invention. The air conditioner 100 includes an indoor unit 9, an outdoor unit 10 connected to the indoor unit 9, and a wireless remote controller 11 that operates the indoor unit 9 and the outdoor unit 10. The outdoor unit 10 is mounted with a compressor 1 to be described later.
　図２は、実施の形態１にかかるヒートポンプ式給湯機２００の外観図である。ヒートポンプ式給湯機２００は、タンクユニット１２と、タンクユニット１２に接続されたヒートポンプ式給湯ユニット１３と、台所用リモートコントローラ１４と、浴室用リモートコントローラ１５と、を備える。ヒートポンプ式給湯機２００の室外機であるヒートポンプ式給湯ユニット１３は、後述する圧縮機１を実装し、台所用リモートコントローラ１４および浴室用リモートコントローラ１５によって操作される。 FIG. 2 is an external view of the heat pump type water heater 200 according to the first embodiment. The heat pump hot water heater 200 includes a tank unit 12, a heat pump hot water supply unit 13 connected to the tank unit 12, a kitchen remote controller 14, and a bathroom remote controller 15. A heat pump type hot water supply unit 13 that is an outdoor unit of the heat pump type hot water supply apparatus 200 is mounted with a compressor 1 described later, and is operated by a kitchen remote controller 14 and a bathroom remote controller 15.
　図３は、実施の形態１にかかる圧縮機１および圧縮機制御回路の構成を示すブロック図である。室外機１０およびヒートポンプ式給湯ユニット１３は、図３に示した圧縮機１および圧縮機制御回路を実装している。圧縮機制御回路は、後述する圧縮機の保護装置５０を含んでいる。 FIG. 3 is a block diagram of the configuration of the compressor 1 and the compressor control circuit according to the first embodiment. The outdoor unit 10 and the heat pump hot water supply unit 13 are mounted with the compressor 1 and the compressor control circuit shown in FIG. The compressor control circuit includes a compressor protection device 50 described later.
　図３の圧縮機制御回路には、整流された電圧を平滑化する平滑コンデンサ１７と、商用電源１６から交流電圧が供給されると平滑コンデンサ１７へ流れこむ突入電流を抑えるための突入電流防止用抵抗１８と、平滑コンデンサ１７に十分電荷が溜まった後にマイクロコンピュータ２からの制御により接点をオンにして突入電流防止用抵抗１８を迂回する経路となる突入電流防止用リレー１９と、商用電源１６からの交流電圧を整流するダイオードブリッジ２０と、が設けられている。突入電流防止用リレー１９は、マイクロコンピュータ２から出力されるソフトスタート信号により制御される。商用電源１６、平滑コンデンサ１７、突入電流防止用抵抗１８、突入電流防止用リレー１９およびダイオードブリッジ２０により構成された直流電源に基づいて、パワー素子モジュール４が圧縮機１を駆動するための三相電源を生成する。 The compressor control circuit of FIG. 3 includes a smoothing capacitor 17 for smoothing the rectified voltage, and an inrush current prevention for suppressing an inrush current flowing into the smoothing capacitor 17 when an AC voltage is supplied from the commercial power supply 16. From the resistor 18, the inrush current prevention relay 19 that becomes a path for turning on the contact by the control from the microcomputer 2 after the charge is sufficiently accumulated in the smoothing capacitor 17 and bypassing the inrush current prevention resistor 18, and the commercial power supply 16. And a diode bridge 20 that rectifies the AC voltage. The inrush current prevention relay 19 is controlled by a soft start signal output from the microcomputer 2. Three-phase for the power element module 4 to drive the compressor 1 based on a DC power source constituted by the commercial power source 16, the smoothing capacitor 17, the inrush current preventing resistor 18, the inrush current preventing relay 19 and the diode bridge 20. Generate power.
　制御部であるマイクロコンピュータ２からは圧縮機１の駆動を指示する圧縮機駆動信号が出力され、圧縮機駆動信号を伝達するラインバッファＩＣ３を経由してパワー素子モジュール４に入力される。ラインバッファＩＣ３は、圧縮機駆動信号を中継するバッファである。この圧縮機駆動信号に基づいてパワー素子モジュール４は三相電源を出力して圧縮機１を駆動する。 Compressor drive signal for instructing driving of the compressor 1 is output from the microcomputer 2 which is a control unit, and is input to the power element module 4 via the line buffer IC 3 for transmitting the compressor drive signal. The line buffer IC3 is a buffer that relays the compressor drive signal. Based on this compressor drive signal, the power element module 4 outputs a three-phase power source to drive the compressor 1.
　平滑コンデンサ１７とパワー素子モジュール４との間の直流電源ライン上には圧縮機電流検出用抵抗２１があり、ここを流れる電流により圧縮機電流検出用抵抗２１の両端に電位差が発生するので、この電位差を電圧検出回路２２が検出し、電圧信号としてマイクロコンピュータ２に伝達する。マイクロコンピュータ２は、電圧検出回路２２から受け取った電圧信号を圧縮機電流情報に変換し、圧縮機電流情報に基づいて、圧縮機１の運転制御および保護制御を行っている。 There is a compressor current detection resistor 21 on the DC power supply line between the smoothing capacitor 17 and the power element module 4, and a potential difference is generated between both ends of the compressor current detection resistor 21 due to the current flowing therethrough. The voltage detection circuit 22 detects the potential difference and transmits it to the microcomputer 2 as a voltage signal. The microcomputer 2 converts the voltage signal received from the voltage detection circuit 22 into compressor current information, and performs operation control and protection control of the compressor 1 based on the compressor current information.
　また、マイクロコンピュータ２には表示部２３が接続されており、表示部２３は、運転状態および異常発生の有無を表示する。 Further, a display unit 23 is connected to the microcomputer 2, and the display unit 23 displays an operating state and whether or not an abnormality has occurred.
　さらに、マイクロコンピュータ２にはメモリ２４が接続されており、メモリ２４には運転制御、保護制御に必要な情報が保存されている。マイクロコンピュータ２は、メモリ２４から情報を読み取り、制御を行っている。また、マイクロコンピュータ２は、運転時に収集した情報および異常が発生したときの情報をメモリ２４に記録している。 Furthermore, a memory 24 is connected to the microcomputer 2, and information necessary for operation control and protection control is stored in the memory 24. The microcomputer 2 reads information from the memory 24 and performs control. Further, the microcomputer 2 records in the memory 24 information collected during operation and information when an abnormality occurs.
　図示しない冷媒配管といった冷媒回路の高圧となる箇所には高圧スイッチ５が取り付けられている。高圧スイッチ５は、冷媒配管内が一定圧力以上となった場合に冷媒配管が高圧異常となったこと検出する。補助スイッチである半導体スイッチ７は、ラインバッファＩＣ３とＤＣ５Ｖ電源６との間に設けられている。高圧スイッチ５は、冷媒配管内が高圧異常となったこと検出すると、半導体スイッチ７をオフにする。半導体スイッチ７がオフになると、保持回路８を介してマイクロコンピュータ２に高圧異常が発生したことが通知されるとともに、ラインバッファＩＣ３へのＤＣ５Ｖ電源６からの電源信号の供給が遮断されて電力供給が止まる。 A high-pressure switch 5 is attached to a location where the refrigerant circuit is at a high pressure, such as a refrigerant pipe (not shown). The high-pressure switch 5 detects that the refrigerant pipe has a high-pressure abnormality when the inside of the refrigerant pipe becomes equal to or higher than a certain pressure. The semiconductor switch 7 as an auxiliary switch is provided between the line buffer IC 3 and the DC 5V power source 6. The high pressure switch 5 turns off the semiconductor switch 7 when detecting that a high pressure abnormality has occurred in the refrigerant pipe. When the semiconductor switch 7 is turned off, the microcomputer 2 is notified through the holding circuit 8 that a high voltage abnormality has occurred, and the supply of the power signal from the DC 5V power source 6 to the line buffer IC 3 is cut off to supply power. Stops.
　図４は、実施の形態１にかかる圧縮機の保護装置５０の回路構成の一例を示す図である。圧縮機の保護装置５０は、図３に示した圧縮機制御回路に含まれており、マイクロコンピュータ２と、ラインバッファＩＣ３と、パワー素子モジュール４と、高圧スイッチ５と、ＤＣ５Ｖ電源６と、フォトカプラで構成された半導体スイッチ７と、保持回路８と、ＤＣ１２Ｖ電源２５と、を備える。 FIG. 4 is a diagram illustrating an example of a circuit configuration of the compressor protection device 50 according to the first embodiment. The compressor protection device 50 is included in the compressor control circuit shown in FIG. 3, and includes a microcomputer 2, a line buffer IC 3, a power element module 4, a high voltage switch 5, a DC 5V power source 6, and a photo. The semiconductor switch 7 comprised with the coupler, the holding circuit 8, and DC12V power supply 25 are provided.
　半導体スイッチ７を構成するフォトカプラの内部には、発光素子であるフォトダイオード３１と、受光素子であるフォトトランジスタ３２と、が収められている。半導体スイッチ７は、高圧スイッチ５が高圧異常を検出しない場合は、フォトトランジスタ３２がオン状態になってＤＣ５Ｖ電源６からラインバッファＩＣ３への電源信号を供給し、高圧スイッチ５が高圧異常を検出した場合は、フォトトランジスタ３２がオフ状態になってＤＣ５Ｖ電源６からラインバッファＩＣ３への電源信号の供給を遮断する。 Inside the photocoupler constituting the semiconductor switch 7, a photodiode 31 which is a light emitting element and a phototransistor 32 which is a light receiving element are housed. In the semiconductor switch 7, when the high voltage switch 5 does not detect a high voltage abnormality, the phototransistor 32 is turned on to supply a power signal from the DC 5V power source 6 to the line buffer IC 3, and the high voltage switch 5 detects the high voltage abnormality. In this case, the phototransistor 32 is turned off, and the supply of the power supply signal from the DC5V power supply 6 to the line buffer IC3 is cut off.
　保持回路８は、冷媒回路が高圧異常であることを示す異常状態と高圧異常でないことを示す正常状態とを有しており、いずれかの状態であることを示す信号を高圧情報としてマイクロコンピュータ２に出力する。保持回路８の具体例はフリップフロップ回路であり、セット端子８１およびリセット端子８２を備え、セット端子８１への入力により正常状態から異常状態へ変化させることが可能で、リセット端子８２への入力により異常状態から正常状態へ変化させることが可能である。フォトトランジスタ３２がオン状態のときは、ＤＣ５Ｖ電源６からの電源信号はセット端子８１へ供給される。保持回路８が正常状態であるときに、ＤＣ５Ｖ電源６からの電源信号が供給されている状態から供給されない状態に変化すると、保持回路８は正常状態から異常状態へと移行する。 The holding circuit 8 has an abnormal state indicating that the refrigerant circuit is abnormal in high pressure and a normal state indicating that the refrigerant circuit is not abnormal in high pressure. The microcomputer 2 uses a signal indicating either state as high-pressure information. Output to. A specific example of the holding circuit 8 is a flip-flop circuit, which includes a set terminal 81 and a reset terminal 82, and can be changed from a normal state to an abnormal state by input to the set terminal 81, and by input to the reset terminal 82. It is possible to change from an abnormal state to a normal state. When the phototransistor 32 is in the on state, a power signal from the DC 5 V power source 6 is supplied to the set terminal 81. When the holding circuit 8 is in a normal state, if the power supply signal from the DC5V power supply 6 is changed to a state where it is not supplied, the holding circuit 8 shifts from a normal state to an abnormal state.
　マイクロコンピュータ２は、保持回路８の出力に基づいて、圧縮機駆動信号を出力するか否かを決定する。具体的には、保持回路８が正常状態であるときに、マイクロコンピュータ２は、圧縮機駆動信号を出力する。 The microcomputer 2 determines whether or not to output a compressor drive signal based on the output of the holding circuit 8. Specifically, when the holding circuit 8 is in a normal state, the microcomputer 2 outputs a compressor drive signal.
　ラインバッファＩＣ３は、電源端子であるＶｃｃ端子に電源信号が供給されている場合に圧縮機駆動信号を中継し、Ｖｃｃ端子に電源信号が供給されない場合は動作を停止して圧縮機駆動信号を中継しない。 The line buffer IC3 relays the compressor drive signal when the power signal is supplied to the Vcc terminal which is the power supply terminal, and stops the operation and relays the compressor drive signal when the power signal is not supplied to the Vcc terminal. do not do.
　以下、図４を用いて、圧縮機の保護装置５０の動作を詳細に説明する。 Hereinafter, the operation of the compressor protection device 50 will be described in detail with reference to FIG.
　高圧スイッチ５は、通常の高圧異常ではない状態では接点が閉じている。高圧スイッチ５の接点が閉じている場合は、ＤＣ１２Ｖ電源２５から高圧スイッチ５を介してフォトダイオード３１に電流が流れる。フォトダイオード３１の発光によりフォトトランジスタ３２がオン状態となりＤＣ５Ｖ電源６から電源信号が供給されラインバッファＩＣ３のＶｃｃ端子にＤＣ５Ｖが供給される。また、同時に保持回路８のセット端子８１にもＤＣ５Ｖ電源６からＤＣ５Ｖ電圧が印加される。電源信号が供給されている保持回路８は正常状態になっており、正常状態を示すＨｉｇｈ（ＤＣ５Ｖ）の高圧情報をマイクロコンピュータ２に出力する。これによりマイクロコンピュータ２は冷媒の圧力が正常範囲内にあることを認識でき、圧縮機１を駆動させるための圧縮機駆動信号を出力できる。 The contact of the high pressure switch 5 is closed when it is not a normal high pressure abnormality. When the contact of the high voltage switch 5 is closed, a current flows from the DC 12 V power supply 25 to the photodiode 31 via the high voltage switch 5. The phototransistor 32 is turned on by the light emission of the photodiode 31, and a power supply signal is supplied from the DC5V power supply 6, and DC5V is supplied to the Vcc terminal of the line buffer IC3. At the same time, a DC5V voltage is applied from the DC5V power supply 6 to the set terminal 81 of the holding circuit 8. The holding circuit 8 to which the power supply signal is supplied is in a normal state, and outputs high voltage information of High (DC 5 V) indicating the normal state to the microcomputer 2. Thereby, the microcomputer 2 can recognize that the pressure of the refrigerant is within the normal range, and can output a compressor drive signal for driving the compressor 1.
　圧縮機１が運転を行うと圧縮機１の吐出側冷媒の圧力は上昇する。冷媒配管の詰まりといった異常があり冷媒配管内の圧力が上昇して、高圧スイッチ５の設定値以上になった場合、異常を検出した高圧スイッチ５の接点はオフとなる。するとＤＣ１２Ｖ電源２５からフォトダイオード３１に電流が流れなくなり、フォトトランジスタ３２はオフとなる。するとラインバッファＩＣ３のＶｃｃ端子にＤＣ５Ｖ電源６からＤＣ５Ｖの電源信号が供給されなくなり、ラインバッファＩＣ３は動作することができなくなる。その結果、ラインバッファＩＣ３は、マイクロコンピュータ２が出力した圧縮機駆動信号をパワー素子モジュール４に中継しなくなる。これにより、パワー素子モジュール４は圧縮機１を駆動する三相電圧の出力を停止する。また、フォトトランジスタ３２がオフとなるとＤＣ５Ｖ電源６からの電源供給が断たれるので、保持回路８のセット端子８１への入力もＤＣ５Ｖから０Ｖに変化する。これにより保持回路８は正常状態から異常状態へと変化して、保持回路８からマイクロコンピュータ２へ出力される高圧情報はＨｉｇｈ（ＤＣ５Ｖ）から異常状態を示すＬｏｗ（０Ｖ）に変化するのでマイクロコンピュータ２は、高圧異常が発生したことを認識することができ、圧縮機駆動信号の出力を停止する制御を実施することができる。 When the compressor 1 operates, the pressure of the discharge side refrigerant of the compressor 1 increases. When there is an abnormality such as clogging of the refrigerant pipe and the pressure in the refrigerant pipe rises and exceeds the set value of the high pressure switch 5, the contact of the high pressure switch 5 that detected the abnormality is turned off. Then, no current flows from the DC12V power supply 25 to the photodiode 31, and the phototransistor 32 is turned off. Then, the DC5V power supply signal is not supplied from the DC5V power supply 6 to the Vcc terminal of the line buffer IC3, and the line buffer IC3 cannot operate. As a result, the line buffer IC 3 does not relay the compressor drive signal output from the microcomputer 2 to the power element module 4. As a result, the power element module 4 stops outputting the three-phase voltage that drives the compressor 1. When the phototransistor 32 is turned off, the power supply from the DC5V power supply 6 is cut off, so that the input to the set terminal 81 of the holding circuit 8 also changes from DC5V to 0V. As a result, the holding circuit 8 changes from the normal state to the abnormal state, and the high voltage information output from the holding circuit 8 to the microcomputer 2 changes from High (DC5V) to Low (0V) indicating the abnormal state. 2 can recognize that a high-pressure abnormality has occurred, and can perform control to stop the output of the compressor drive signal.
　圧縮機１が停止すると冷媒配管内の圧力が低下するので、冷媒配管内の圧力が高圧スイッチ５の復帰圧力以下になった時、圧力スイッチ５の接点はオフからオンに切り替わる。これにより電源信号が供給されて保持回路８のセット端子８１へ入力される電圧も０ＶからＤＣ５Ｖになるが、保持回路８は先ほどの高圧異常の発生によりセット端子８１への入力が一旦０Ｖとなったことにより異常状態になった状態を維持して出力状態を保持するため、保持回路８の出力は異常状態を示すＬｏｗ（０Ｖ）のままとなる。したがって、マイクロコンピュータ２は、高圧異常が発生したときの状態を維持して、圧縮機駆動信号の出力を停止したままの状態となる。 When the compressor 1 is stopped, the pressure in the refrigerant pipe decreases, so when the pressure in the refrigerant pipe becomes equal to or lower than the return pressure of the high pressure switch 5, the contact of the pressure switch 5 is switched from off to on. As a result, the voltage supplied to the set terminal 81 of the holding circuit 8 from the power supply signal is also changed from 0V to DC5V. In order to maintain the output state while maintaining the abnormal state, the output of the holding circuit 8 remains Low (0 V) indicating the abnormal state. Therefore, the microcomputer 2 maintains the state when the high pressure abnormality occurs, and remains in a state where the output of the compressor drive signal is stopped.
　圧縮機１を再度起動させるためには、高圧スイッチ５の接点がオンに復帰しており、かつマイクロコンピュータ２から保持回路８のリセット端子８２に対してＬｏｗ（０Ｖ）のパルス信号であるリセット信号が出力されなければならない。高圧スイッチ５の接点がオンの状態でマイクロコンピュータ２から異常状態にある保持回路８のリセット端子８２にリセット信号を出力することにより、保持回路８を異常状態から正常状態に移行させることができる。リセット信号を受信すると、保持回路８は正常状態に移行し、保持回路８からマイクロコンピュータ２への高圧情報はＬｏｗ（０Ｖ）から正常状態を示すＨｉｇｈ（ＤＣ５Ｖ）に復帰する。これにより、マイクロコンピュータ２は圧縮機駆動信号を出力することが可能となる。ここで、マイクロコンピュータ２がリセット信号を出力することができる条件は、圧縮機１が停止してからｎ分後（ｎは予め定めた数）と設定して冷媒配管内の圧力が十分低下した時としたり、ワイヤレスリモートコントローラ１１、台所用リモートコントローラ１４または浴室用リモートコントローラ１５から異常発生状態をリセットする操作を行った時とすることができる。 In order to start the compressor 1 again, the contact of the high voltage switch 5 is returned to ON, and the reset signal which is a low (0V) pulse signal from the microcomputer 2 to the reset terminal 82 of the holding circuit 8 Must be output. By outputting a reset signal from the microcomputer 2 to the reset terminal 82 of the holding circuit 8 in an abnormal state while the contact of the high-voltage switch 5 is on, the holding circuit 8 can be shifted from the abnormal state to the normal state. When the reset signal is received, the holding circuit 8 shifts to a normal state, and the high voltage information from the holding circuit 8 to the microcomputer 2 returns from Low (0 V) to High (DC 5 V) indicating the normal state. Thereby, the microcomputer 2 can output a compressor drive signal. Here, the condition under which the microcomputer 2 can output the reset signal is set to n minutes after the compressor 1 is stopped (n is a predetermined number), and the pressure in the refrigerant pipe is sufficiently reduced. It may be when the operation of resetting the abnormality occurrence state is performed from the wireless remote controller 11, the kitchen remote controller 14, or the bathroom remote controller 15.
　図５は、実施の形態１にかかる半導体スイッチ７の別の回路構成の例を示す図である。半導体スイッチ７は、図５に示すようにフォトカプラを使用しないでトランジスタを使用した回路とすることもできる。半導体スイッチ７は、電界効果トランジスタを使用することもできる。 FIG. 5 is a diagram illustrating an example of another circuit configuration of the semiconductor switch 7 according to the first embodiment. As shown in FIG. 5, the semiconductor switch 7 may be a circuit using a transistor without using a photocoupler. The semiconductor switch 7 can also use a field effect transistor.
　以上説明したように、実施の形態１にかかる圧縮機の保護装置５０は、冷媒配管内が異常高圧となって高圧スイッチ５が作動したときには、半導体スイッチ７によりマイクロコンピュータ２からの圧縮機駆動信号がパワー素子モジュール４に行かないように保持回路８に指示を送ると同時に、ラインバッファＩＣ３の電源を遮断する。すなわち、冷媒回路の高圧異常が発生した場合に、誤動作を起こす可能性があるマイクロコンピュータ２を介さず、また圧縮機１への電源供給ラインを遮断することなく、安価な手段で確実に圧縮機１を停止させることができる。また、実施の形態１にかかる圧縮機の保護装置５０は、安価な半導体スイッチ７およびラインバッファＩＣ３を使用するので、小型化およびコストの抑制が図れるという効果を有する。 As described above, the compressor protection device 50 according to the first embodiment is configured such that when the high pressure switch 5 is activated due to an abnormally high pressure in the refrigerant piping, the compressor drive signal from the microcomputer 2 by the semiconductor switch 7. Sends an instruction to the holding circuit 8 so as not to go to the power element module 4, and at the same time, the power of the line buffer IC3 is cut off. In other words, when a high-pressure abnormality occurs in the refrigerant circuit, the compressor can be surely secured by inexpensive means without going through the microcomputer 2 that may cause malfunction and without interrupting the power supply line to the compressor 1. 1 can be stopped. Further, since the compressor protection device 50 according to the first embodiment uses the inexpensive semiconductor switch 7 and the line buffer IC 3, there is an effect that it is possible to reduce the size and the cost.
　これにより、高圧スイッチ５が働いたことを示す高圧情報が何らかの理由によりマイクロコンピュータ２に到達できずにマイクロコンピュータ２が圧縮機駆動信号を出力し続けてしまう場合、もしくは高圧情報がマイクロコンピュータ２に到達してもマイクロコンピュータ２が誤動作を起こしていて圧縮機駆動信号を出力し続けてしまう場合であっても、圧縮機の保護装置５０は、圧縮機駆動信号をラインバッファＩＣ３の部分で確実に遮断して圧縮機１の運転継続を回避することができる。 Thereby, when the high voltage information indicating that the high voltage switch 5 has worked cannot reach the microcomputer 2 for some reason and the microcomputer 2 continues to output the compressor drive signal, or the high voltage information is sent to the microcomputer 2. Even when the microcomputer 2 malfunctions and continues to output the compressor drive signal, the compressor protection device 50 ensures that the compressor drive signal is received at the line buffer IC3. The operation of the compressor 1 can be avoided by shutting off.
　また、ラインバッファＩＣにバッファ機能のオンまたはオフを選択するための選択端子が備えられていて、保持回路８からの高圧情報によりバッファ出力をオンまたはオフしている場合に、ラインバッファＩＣの故障または誤動作によりバッファ機能が常時オンとなってしまった場合であっても、圧縮機の保護装置５０は、圧縮機駆動信号をラインバッファＩＣ３の部分で確実に遮断することができる。 Further, when the line buffer IC is provided with a selection terminal for selecting ON or OFF of the buffer function, and the buffer output is turned ON or OFF by the high voltage information from the holding circuit 8, the line buffer IC is faulty. Alternatively, even when the buffer function is always on due to malfunction, the compressor protection device 50 can reliably block the compressor drive signal at the portion of the line buffer IC3.
　また、マイクロコンピュータ２が圧縮機駆動信号を出力し続けたとしても高圧スイッチ５の作動圧力に達すればラインバッファＩＣ３は動作を停止するので圧縮機１は停止し、復帰圧力以下となった時に起動させることができるので、停止および復帰を繰り返しても冷媒配管内が高圧による危険な状態になることはない。すなわち、圧縮機駆動信号で起動制御を行っていないので、高圧状態において圧縮機駆動信号が出力されたとしても圧縮機１は起動できないので高圧により冷媒配管内が危険な状態になることを確実に防ぐことが可能となる。 Even if the microcomputer 2 continues to output the compressor drive signal, the line buffer IC3 stops operating if the operating pressure of the high pressure switch 5 is reached, so the compressor 1 stops and starts when the pressure is below the return pressure. Therefore, even if the stop and return are repeated, the refrigerant pipe does not become dangerous due to high pressure. That is, since the start control is not performed with the compressor drive signal, the compressor 1 cannot be started even if the compressor drive signal is output in the high pressure state, so that the refrigerant pipe is surely in a dangerous state due to the high pressure. It becomes possible to prevent.
　以上の実施の形態に示した構成は、本発明の内容の一例を示すものであり、別の公知の技術と組み合わせることも可能であるし、本発明の要旨を逸脱しない範囲で、構成の一部を省略、変更することも可能である。 The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
　１　圧縮機、２　マイクロコンピュータ、３　ラインバッファＩＣ、４　パワー素子モジュール、５　高圧スイッチ、６　ＤＣ５Ｖ電源、７　半導体スイッチ、８　保持回路、９　室内機、１０　室外機、１１　ワイヤレスリモートコントローラ、１２　タンクユニット、１３　ヒートポンプ式給湯ユニット、１４　台所用リモートコントローラ、１５　浴室用リモートコントローラ、１６　商用電源、１７　平滑コンデンサ、１８　突入電流防止用抵抗、１９　突入電流防止用リレー、２０　ダイオードブリッジ、２１　圧縮機電流検出用抵抗、２２　電圧検出回路、２３　表示部、２４　メモリ、２５　ＤＣ１２Ｖ電源、３１　フォトダイオード、３２　フォトトランジスタ、５０　圧縮機の保護装置、８１　セット端子、８２　リセット端子。 1 compressor, 2 microcomputer, 3 line buffer IC, 4 power element module, 5 high voltage switch, 6 DC 5V power supply, 7 semiconductor switch, 8 holding circuit, 9 indoor unit, 10 outdoor unit, 11 wireless remote controller, 12 tank unit , 13 Heat pump type hot water supply unit, 14 Remote controller for kitchen, 15 Remote controller for bathroom, 16 Commercial power supply, 17 Smoothing capacitor, 18 Inrush current prevention resistor, 19 Inrush current prevention relay, 20 Diode bridge, 21 Compressor current detection Resistance, 22 voltage detection circuit, 23 display unit, 24 memory, 25 DC12V power supply, 31 photodiode, 32 phototransistor, 50 compressor protection device, 81 set terminal, 82 reset Door terminal.

Claims (4)

  1. 　冷媒回路の高圧異常を検出する高圧スイッチと、
    　前記高圧スイッチが高圧異常を検出しないときに電源信号を供給し、前記高圧スイッチが高圧異常を検出したときに電源信号の供給を遮断する補助スイッチと、
    　異常状態と正常状態とを有し、前記電源信号が供給されている状態から供給されない状態に変化すると前記正常状態から前記異常状態に移行する保持回路と、
    　前記保持回路が前記正常状態であるときに圧縮機の駆動を指示する圧縮機駆動信号を出力する制御部と、
    　前記制御部が出力する前記圧縮機駆動信号を、前記電源信号が供給されている場合に中継し、前記電源信号が供給されない場合に中継しないバッファと、
    　前記バッファにより中継された前記圧縮機駆動信号に基づいて前記圧縮機を駆動するパワー素子モジュールと、
    　を備えることを特徴とする圧縮機の保護装置。     A high pressure switch for detecting a high pressure abnormality in the refrigerant circuit;
    An auxiliary switch that supplies a power signal when the high-voltage switch does not detect a high-voltage abnormality, and interrupts the supply of the power signal when the high-voltage switch detects a high-voltage abnormality;
    A holding circuit that has an abnormal state and a normal state, and transitions from the normal state to the abnormal state when the power signal is supplied to the non-supplied state;
    A control unit that outputs a compressor drive signal for instructing driving of the compressor when the holding circuit is in the normal state;
    A buffer that relays the compressor drive signal output by the control unit when the power signal is supplied, and does not relay when the power signal is not supplied;
    A power element module for driving the compressor based on the compressor drive signal relayed by the buffer;
    A compressor protection device comprising:
  2. 　前記制御部は、リセット信号により前記保持回路を前記異常状態から前記正常状態に移行させる
    　ことを特徴とする請求項１に記載の圧縮機の保護装置。     The compressor protection device according to claim 1, wherein the control unit shifts the holding circuit from the abnormal state to the normal state by a reset signal.
  3. 　前記補助スイッチは、半導体スイッチである
    　ことを特徴とする請求項１または２に記載の圧縮機の保護装置。     The compressor protection device according to claim 1, wherein the auxiliary switch is a semiconductor switch.
  4. 　前記半導体スイッチは、前記高圧スイッチに接続されたフォトダイオードおよび前記電源信号の供給および供給の遮断が可能なフォトトランジスタを備えたフォトカプラである
    　ことを特徴とする請求項３に記載の圧縮機の保護装置。     The compressor of claim 3, wherein the semiconductor switch is a photocoupler including a photodiode connected to the high-voltage switch and a phototransistor capable of supplying and interrupting the supply of the power signal. Protective device.
PCT/JP2016/061016 2016-04-04 2016-04-04 Protective device for compressor WO2017175273A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
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CN110285594A (en) * 2019-06-13 2019-09-27 合肥美的电冰箱有限公司 Refrigeration system and its control method, refrigeration equipment, electronic equipment and medium

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JP2007225218A (en) * 2006-02-24 2007-09-06 Matsushita Electric Ind Co Ltd Heat pump control device
JP2009036056A (en) * 2007-07-31 2009-02-19 Ubukata Industries Co Ltd Sealed electric compressor

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Publication number Priority date Publication date Assignee Title
JP2007225218A (en) * 2006-02-24 2007-09-06 Matsushita Electric Ind Co Ltd Heat pump control device
JP2009036056A (en) * 2007-07-31 2009-02-19 Ubukata Industries Co Ltd Sealed electric compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110285594A (en) * 2019-06-13 2019-09-27 合肥美的电冰箱有限公司 Refrigeration system and its control method, refrigeration equipment, electronic equipment and medium

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