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WO2019049330A1 - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
WO2019049330A1
WO2019049330A1 PCT/JP2017/032562 JP2017032562W WO2019049330A1 WO 2019049330 A1 WO2019049330 A1 WO 2019049330A1 JP 2017032562 W JP2017032562 W JP 2017032562W WO 2019049330 A1 WO2019049330 A1 WO 2019049330A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
outdoor
indoor
terminal
power supply
Prior art date
Application number
PCT/JP2017/032562
Other languages
French (fr)
Japanese (ja)
Inventor
和重 澤田
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to SG11201912971TA priority Critical patent/SG11201912971TA/en
Priority to AU2017431039A priority patent/AU2017431039B2/en
Priority to EP17924638.4A priority patent/EP3680566B1/en
Priority to JP2019540251A priority patent/JP6797311B2/en
Priority to PCT/JP2017/032562 priority patent/WO2019049330A1/en
Publication of WO2019049330A1 publication Critical patent/WO2019049330A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/38—Failure diagnosis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits

Definitions

  • the present invention relates to an air conditioner provided with an indoor unit and an outdoor unit.
  • the indoor unit and the outdoor unit are generally connected by three wires called a power supply line, a signal line, and a power supply signal common line.
  • the air conditioner of the said structure is disclosed by the following, patent document 1. FIG.
  • Patent Document 1 The conventional air conditioner represented by Patent Document 1 below applies commercial power from the indoor unit to the outdoor unit when resuming operation from the time of power on or operation standby state, and the inrush current prevention relay of the outdoor unit is Operate and start the outdoor unit.
  • the started outdoor unit starts communication with the indoor unit to establish communication. If communication can not be established between the indoor unit and the outdoor unit, control for applying commercial power from the indoor unit to the outdoor unit is performed again to try to establish communication.
  • This invention is made in view of the above, Comprising: It aims at obtaining the air conditioner which can suppress the failure of the outdoor unit circuit which may occur by reapplication of a commercial power source.
  • an air conditioner includes an indoor unit and an outdoor unit.
  • the indoor unit activates the outdoor unit.
  • the indoor unit starts up the outdoor unit, it determines whether communication can be established with the outdoor unit. If the communication can not be established, the indoor unit receives the first signal generated by the indoor unit and performs self reception. The indoor unit determines whether to restart the outdoor unit based on the result of self reception.
  • the air conditioner which concerns on this invention has an effect that the failure of the outdoor unit circuit which may occur by reapplication of a commercial power source can be suppressed.
  • Block diagram showing the electrical system of the air conditioner according to the embodiment Flow chart showing the main part operation of the air conditioner in the embodiment Block diagram showing a configuration example of the indoor communication circuit unit in the air conditioner of the embodiment Block diagram showing a configuration example of the outdoor communication circuit unit in the air conditioner of the embodiment Diagram for explaining the operation at the momentary power failure Block diagram showing an example of the hardware configuration of the indoor control unit of the embodiment Block diagram showing another example of the hardware configuration of the indoor control unit according to the embodiment
  • connection an air conditioner according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
  • the present invention is not limited by the following embodiments. Also, in the following description, “physical connection” and “electrical connection” are simply referred to as “connection” without distinction.
  • FIG. 1 is a block diagram showing an electrical system of the air conditioner according to the embodiment.
  • an air conditioner 100 according to the embodiment includes an outdoor unit 1 and an indoor unit 2 for starting the outdoor unit 1.
  • FIG. 1 particularly shows a connection state before the outdoor unit 1 is started.
  • the outdoor unit 1 and the indoor unit 2 are connected by three lines of a power supply line 24, a power signal common line 25 and a signal line 26.
  • the outdoor unit 1 is connected to a three-phase AC power supply 3.
  • a three-phase AC voltage is applied to the outdoor unit 1 through the power supply line 65.
  • a single-phase AC voltage is applied to the indoor unit 2 from two of the power supply lines 65 via the power supply line 24 and the power supply signal common line 25.
  • the air conditioner 100 according to the embodiment is an air conditioner configured such that a three-phase alternating current power supply is supplied to the outdoor unit 1 and a single-phase alternating current power supply is supplied to the indoor unit 2.
  • the indoor unit 2 includes an indoor control unit 4 and an outdoor start relay 8.
  • the outdoor start relay 8 opens and closes the connection between the power supply line 24 and the signal line 26. To "open and close the connection” is to switch between the disconnected state and the connected state.
  • the indoor control unit 4 controls the outdoor start relay 8 to supply single-phase AC power between the signal line 26 and the power signal common line 25.
  • the outdoor unit 1 includes an outdoor rectification unit 9, a first inrush current prevention relay 10, a power supply relay 12, a second inrush current prevention relay 13, a smoothing capacitor 14, an inverter circuit unit 15, and outdoor control. And a unit 16.
  • the outdoor unit 1 further includes a communication circuit power supply unit 18, an outdoor communication circuit unit 19, a power supply switching relay 20, an inrush current prevention relay driving unit 21, and a compressor 80.
  • the compressor 80 is driven by the inverter circuit unit 15.
  • the outdoor rectifying unit 9 is connected to the power supply relay 12.
  • the power supply relay 12 opens and closes the connection between the three-phase AC power supply 3 and the outdoor rectification unit 9.
  • the outdoor rectifier 9 rectifies the output of the three-phase AC power supply 3.
  • the smoothing capacitor 14 smoothes the output of the outdoor rectifier 9.
  • the outdoor communication circuit unit 19 communicates with the indoor unit 2 via the power supply signal common line 25 and the signal line 26.
  • the power supply switching relay 20 is connected between the power signal common line 25 and the communication circuit power supply unit 18.
  • Inrush current prevention relay drive unit 21 receives a single-phase AC voltage applied between power supply signal common line 25 and signal line 26 via outdoor start relay 8 of indoor unit 2 and power supply switching relay 20. Operate when supplied.
  • the first inrush current prevention relay 10 is connected in parallel to the power supply relay 12, and is controlled by the inrush current prevention relay drive unit 21.
  • the second inrush current prevention relay 13 is connected in parallel to the first inrush current prevention relay 10 and is controlled by the outdoor control unit
  • the outdoor unit 1 includes an outdoor terminal block 23.
  • the outdoor terminal block 23 has an R terminal 27, an S terminal 28, a T terminal 29, an outdoor S1 terminal 30, an outdoor S2 terminal 31, and an outdoor S3 terminal 32.
  • the R terminal 27, the S terminal 28, and the T terminal 29 are connected to the three-phase alternating current power supply 3. Electric power from the three-phase AC power supply 3 is supplied to the outdoor unit 1 through the R terminal 27, the S terminal 28 and the T terminal 29.
  • the outdoor S1 terminal 30 and the R terminal 27 are connected, and the outdoor S2 terminal 31 and the S terminal 28 are connected.
  • the communication circuit power supply unit 18 is supplied with electric power by single-phase alternating current via the outdoor S1 terminal 30 and the outdoor S2 terminal 31.
  • the power supplied to the outdoor S1 terminal 30 and the outdoor S2 terminal 31 is not limited to the single-phase power between the R terminal 27 and the S terminal 28.
  • the single-phase power between any two phases in the three-phase AC power supply 3 It can be used.
  • the indoor unit 2 includes an indoor terminal block 22.
  • the indoor terminal block 22 has an indoor S1 terminal 33, an indoor S2 terminal 34, and an indoor S3 terminal 35.
  • the indoor S1 terminal 33 is connected to the outdoor S1 terminal 30 via the power supply line 24.
  • the indoor S2 terminal 34 is connected to the outdoor S2 terminal 31 by the power signal common line 25.
  • the indoor S3 terminal 35 is connected to the outdoor S3 terminal 32 by a signal line 26.
  • the indoor unit 2 includes an indoor rectification unit 5, an indoor communication circuit unit 6, an indoor operation switching unit 7, and a remote control reception unit 36, in addition to the indoor control unit 4 and the outdoor activation relay 8 described above.
  • the outdoor start relay 8 has a terminal a, a terminal b and a terminal c.
  • the a terminal is connected to the indoor S1 terminal 33.
  • the b terminal is connected to the indoor communication circuit unit 6.
  • the c terminal which is the base point of the outdoor activation relay 8, is connected to the indoor S3 terminal 35.
  • the contact point of the outdoor activation relay 8 is connected to any one of the a terminal and the b terminal. That is, the outdoor activation relay 8 switches whether the indoor S3 terminal 35 is connected to the indoor S1 terminal 33 or the indoor S3 terminal 35 is connected to the indoor communication circuit unit 6.
  • the indoor S1 terminal 33 is connected to the indoor rectification unit 5.
  • the indoor S2 terminal 34 is connected to the indoor rectification unit 5 and the indoor communication circuit unit 6.
  • the single-phase AC voltage applied between the power supply line 24 and the power supply signal common line 25 is converted into a DC voltage by the indoor rectification unit 5, and power is supplied to the indoor control unit 4.
  • the indoor operation switching unit 7 connected to the indoor control unit 4 determines whether to reduce standby power, which is power consumed by the outdoor unit 1 at the time of operation standby.
  • the illustrated example is an example in which whether to reduce standby power is set by a jumper wire.
  • the standby power is reduced if a jumper wire is connected between the c1 terminal and the c2 terminal, and if a jumper wire is connected between the c2 terminal and the c3 terminal, the standby power Not reduce
  • the switching method of whether to reduce standby power is not restricted to a jumper wire, and may be switching by a switch.
  • the remote control reception unit 36 is connected to the remote control 37 and the indoor control unit 4.
  • the remote control reception unit 36 receives the operation command from the remote control 37 and transmits the received command to the indoor control unit 4.
  • the outdoor unit 1 further includes an inrush current prevention resistor 11 and an outdoor operation switching unit 17.
  • the R terminal 27 of the outdoor unit 1 is connected to one end of each of the first inrush current preventing relay 10 and the second inrush current preventing relay 13 and the a terminal which is one of the terminals on the one end side of the power supply relay 12. Be done.
  • the other ends of the first inrush current preventing relay 10 and the second inrush current preventing relay 13 are connected to one end of the inrush current preventing resistor 11.
  • the other end of the inrush current prevention resistor 11 is connected to the b terminal, which is one of the terminals on the other end side of the power supply relay 12, and the outdoor rectifier 9. Further, both ends of the first inrush current prevention relay 10 and the second inrush current prevention relay 13 are connected to the outdoor operation switching unit 17.
  • the S terminal 28 is connected to the c terminal, which is another one of the terminals on one end side of the power supply relay 12. Another terminal d of the other terminal of the power supply relay 12 is connected to the outdoor rectifier 9. The T terminal 29 is connected to the outdoor rectifier 9 without the power supply relay 12.
  • FIG. 1 shows an example in which the a terminal and the c terminal, which are terminals on one end side of the power supply relay 12, are respectively connected to the R terminal 27 and the S terminal 28, it is not limited thereto. Any two terminals of the R terminal 27, the S terminal 28, and the T terminal 29 may be connected to the a terminal and the c terminal of the power supply relay 12.
  • one end and the other end of the circuit portion in which the inrush current preventing resistor 11 is connected in series to the parallel circuit of the first inrush current preventing relay 10 and the second inrush current preventing relay 13 are terminal a in FIG. Although connected to the b terminal, it is not limited to this.
  • One end and the other end of the circuit portion may be connected to the c terminal and the d terminal, respectively. That is, one end and the other end in the circuit section may be connected to the input and output of any one contact in the power supply relay 12.
  • the power supply relay 12 is a two-contact relay, but may be configured to have two one-contact relays.
  • the outdoor rectifier 9 rectifies the AC voltage of the three-phase AC power supply 3 and converts it to any DC voltage.
  • the power supply relay 12 and the second inrush current prevention relay 13 operate under the control of the outdoor control unit 16, and when they do not operate, the contacts are opened as shown in FIG.
  • the outdoor operation switching unit 17 is connected to both ends of the first inrush current prevention relay 10 and is also connected to the outdoor control unit 16.
  • the outdoor operation switching unit 17 determines whether to reduce the standby power during the operation standby.
  • the illustrated example is an example in which whether to reduce standby power is set by a jumper wire.
  • the outdoor operation switching unit 17 if a jumper wire is connected between the a1 terminal and the a2 terminal, the standby power during operation standby is reduced.
  • the b1 terminal and the b2 terminal form a current path that bypasses the first inrush current prevention relay 10. For this reason, standby power at the time of standby is not reduced.
  • Information on whether to reduce the standby power at the time of operation standby is transmitted from the outdoor operation switching unit 17 to the outdoor control unit 16.
  • Both ends of the smoothing capacitor 14 are connected to the outdoor rectifier 9.
  • the DC voltage smoothed by the smoothing capacitor 14 is applied to the inverter circuit unit 15 and the outdoor control unit 16.
  • the power supply switching relay 20 has terminals a, b and c.
  • the a terminal is connected to the communication circuit power supply unit 18.
  • the b terminal is connected to the inrush current prevention relay drive unit 21.
  • the c terminal is connected to the outdoor S2 terminal 31.
  • the c terminal which is the base point of the power supply switching relay 20, is connected to the outdoor S2 terminal 31.
  • the contact point of the power supply switching relay 20 is connected to either the a terminal or the b terminal. That is, the power supply switching relay 20 switches whether to connect the outdoor S2 terminal 31 to the inrush current prevention relay drive unit 21 or to connect the outdoor S2 terminal 31 to the communication circuit power supply unit 18.
  • the outdoor control unit 16 controls the power supply switching relay 20.
  • the contact point of the power supply switching relay 20 is connected to the b terminal, and the outdoor S2 terminal 31 and the inrush current prevention relay drive unit 21 are connected via the power supply switching relay 20.
  • the inrush current prevention relay drive unit 21 is supplied with current.
  • the inrush current prevention relay drive unit 21 is energized, the contacts of the first inrush current prevention relay 10 are closed.
  • the power supply switching relay 20 when the power supply switching relay 20 is ON, the contact of the power supply switching relay 20 is connected to the a terminal. At this time, the outdoor S2 terminal 31 is connected to the communication circuit power supply unit 18 via the power supply switching relay 20.
  • the communication circuit power supply unit 18 generates a DC voltage from the single phase AC voltage applied between the power supply line 24 and the power supply signal common line 25, and applies a DC voltage to the outdoor communication circuit unit 19.
  • the generation of the DC voltage can be realized by a half wave rectification circuit or a full wave rectification circuit, other circuits may be used.
  • the inverter circuit unit 15 is controlled by the outdoor control unit 16 and converts the applied DC voltage into an AC voltage of an arbitrary frequency and an arbitrary voltage.
  • the inverter circuit unit 15 applies the converted AC voltage to the compressor 80 to drive the compressor 80.
  • the operation of the air conditioner 100 in the operation standby mode will be described with reference to FIG. First, the electric power of the three-phase AC power supply 3 is supplied to the outdoor unit 1 through the R terminal 27, the S terminal 28 and the T terminal 29.
  • the contacts of the first inrush current prevention relay 10, the second inrush current prevention relay 13, and the power supply relay 12 are open in the operation standby mode, the inverter circuit unit 15, which is an outdoor unit load, is outdoors Power is not supplied to the operation switching unit 17 and the outdoor control unit 16.
  • the rush current prevention relay drive unit 21 has one end connected to the power signal common line 25 via the outdoor S2 terminal 31 and the other end connected to the signal line 26 via the outdoor S3 terminal 32. Power is not supplied.
  • the inverter circuit unit 15, the outdoor control unit 16, the outdoor operation switching unit 17, the communication circuit power supply unit 18, and the outdoor communication circuit unit 19 are not supplied with power, and thus the outdoor unit 1 is operated.
  • the standby power at is reduced.
  • the air conditioner 100 starts the driving operation.
  • the electric power from the three-phase AC power supply 3 is supplied to the indoor unit 2 through the power supply line 24 and the power supply signal common line 25, the electric power is supplied to the indoor control unit 4, and the indoor unit 2 is started.
  • the setting of the indoor operation switching unit 7 is confirmed.
  • a jumper wire is connected to the terminals c1 and c2, so it is recognized as an air conditioner that reduces standby power during standby for operation.
  • the indoor control unit 4 shifts to a state of waiting for the operation command from the remote control 37 via the remote control reception unit 36.
  • the indoor control unit 4 When the indoor control unit 4 receives the operation command signal from the remote control 37, the indoor control unit 4 turns on the outdoor activation relay 8 to activate the outdoor unit 1. At this time, the connection between the indoor S3 terminal 35 and the indoor communication circuit unit 6 is disconnected, and the connection between the indoor S3 terminal 35 and the indoor S1 terminal 33 is switched. By this control, a single phase AC voltage is applied between the outdoor S2 terminal 31 and the outdoor S3 terminal 32.
  • the inrush current prevention relay drive unit 21 When power is supplied between the outdoor S2 terminal 31 and the outdoor S3 terminal 32, the inrush current prevention relay drive unit 21 is energized through the power supply switching relay 20, and the contact point of the first inrush current prevention relay 10 is It is closed. When the contacts of the first inrush current prevention relay 10 are closed, the AC voltage from the three-phase AC power supply 3 is converted to a DC voltage by the outdoor rectifier 9. The converted DC voltage is applied to the smoothing capacitor 14 and the inverter circuit unit 15.
  • the outdoor control unit 16 is activated by the application of the DC voltage.
  • the outdoor control unit 16 closes the contact of the second inrush current prevention relay 13 after activation.
  • the outdoor control unit 16 monitors the voltage charged in the smoothing capacitor 14, and after confirming that the voltage is stabilized at the set voltage, closes the contact of the power supply relay 12. Thereafter, the outdoor control unit 16 opens the contact of the second inrush current prevention relay 13.
  • the second inrush current prevention relay 13 is a relay for enhancing the possibility of the self recovery from the momentary power failure and for improving the convenience of the user.
  • the instantaneous power failure is a phenomenon in which the external power supply is temporarily interrupted. The operation at the time of instantaneous power failure in the second inrush current prevention relay 13 will be described later.
  • the indoor control unit 4 turns off the outdoor activation relay 8 after an arbitrary set time has elapsed after the outdoor activation relay 8 is turned on. At this time, the connection between the indoor S3 terminal 35 and the indoor S1 terminal 33 is disconnected, and the connection is switched to the connection between the indoor S3 terminal 35 and the indoor communication circuit unit 6.
  • the single-phase AC voltage applied between the outdoor S2 terminal 31 and the outdoor S3 terminal 32 is shut off, and the rush current prevention relay drive unit 21 is deenergized.
  • the contacts of the first inrush current prevention relay 10 are opened. This operation can prevent inrush current in the outdoor unit startup operation.
  • the outdoor control unit 16 turns on the power supply switching relay 20 to open the connection between the outdoor S2 terminal 31 and the inrush current prevention relay drive unit 21 and perform the outdoor operation.
  • the connection is switched to the connection between the S2 terminal 31 and the communication circuit power supply unit 18.
  • a single-phase AC voltage applied between the outdoor S1 terminal 30 and the outdoor S2 terminal 31 is applied to the communication circuit power supply unit 18.
  • the communication circuit power supply unit 18 converts a single-phase AC voltage into an arbitrary DC voltage and applies it to the outdoor communication circuit unit 19.
  • the first inrush current preventing relay 10 is turned OFF after the OFF operation of the outdoor start relay 8 by the indoor control unit 4.
  • the supply switching relay 20 may be turned on.
  • the power supply switching relay 20 is turned on, the inrush current prevention relay drive unit 21 is deenergized, and the first inrush current prevention relay 10 is turned off. Therefore, even if the order is changed, the outdoor unit 1 is started. Is possible.
  • FIG. 2 is a flowchart showing the operation of the main part of the air conditioner 100 according to the embodiment.
  • FIG. 3 is a block diagram showing a configuration example of the indoor communication circuit unit 6 in the air conditioner 100 of the embodiment.
  • FIG. 4 is a block diagram showing a configuration example of the outdoor communication circuit unit 19 in the air conditioner 100 of the embodiment.
  • the indoor communication circuit unit 6 includes a transmission unit 38, a reception unit 39, a transmission control unit 50, and a reception control unit 51.
  • the transmitting unit 38 and the receiving unit 39 are connected in series, and inserted between the power supply signal common line 25 and the signal line 26.
  • the outdoor communication circuit unit 19 includes a transmission unit 40, a reception unit 41, a transmission control unit 60, and a reception control unit 61.
  • the transmitting unit 40 and the receiving unit 41 are connected in series and inserted between the power supply signal common line 25 and the signal line 26.
  • step S1 the indoor unit 2 is activated. As described above, startup of the indoor unit 2 is performed by supplying power from the three-phase AC power supply 3 to the indoor unit 2.
  • step S2 the outdoor activation relay 8 is controlled to be in the ON state.
  • the indoor S3 terminal 35 and the indoor S1 terminal 33 are connected, and a single-phase AC voltage is applied between the outdoor S2 terminal 31 and the outdoor S3 terminal 32.
  • a single-phase AC voltage is applied between the outdoor S2 terminal 31 and the outdoor S3 terminal 32, the outdoor unit 1 is activated.
  • the outdoor activation relay 8 is controlled to be in the ON state, the outdoor activation relay 8 is returned to the OFF state.
  • the connection between the indoor S3 terminal 35 and the indoor S1 terminal 33 is released, and the connection between the indoor S3 terminal 35 and the indoor communication circuit unit 6 is switched.
  • step S3 the power supply switching relay 20 is controlled to be ON.
  • the connection between the outdoor S2 terminal 31 and the inrush current prevention relay drive unit 21 is released, and the connection between the outdoor S2 terminal 31 and the communication circuit power supply unit 18 is switched.
  • a single-phase AC voltage is applied to the communication circuit power supply unit 18.
  • step S4 power supply to the communication circuit power supply unit 18 is performed.
  • the communication circuit power supply unit 18 converts the single-phase AC voltage into an arbitrary DC voltage and applies it to the outdoor communication circuit unit 19.
  • step S5 communication is started between the outdoor unit 1 and the indoor unit 2.
  • the communication of step S5 is performed by the main action of the outdoor unit 1. That is, the outdoor unit 1 is a master, and the indoor unit 2 is a slave. The details of the communication operation performed between the outdoor unit 1 and the indoor unit 2 will be described later.
  • step S6 it is determined whether communication can be established between the outdoor unit 1 and the indoor unit 2. If communication can be established (Yes at step S6), the process proceeds to step S7. In step S7, steady-state communication is performed between the outdoor unit 1 and the indoor unit 2. In steady-state communication, various information necessary for control of the air conditioner 100 is exchanged.
  • step S8 the outdoor control unit 16 of the outdoor unit 1 receives the operation start command from the indoor unit 2 and starts the operation of the heating operation or the cooling operation.
  • Step S9 is communication path confirmation processing, and includes processing from step S10 to step S16.
  • step S10 the test signal is transmitted in the indoor unit 2, and it is determined whether self-reception can be performed.
  • the self reception means a process of receiving the signal generated by the transmission unit 38 of the indoor unit 2 by the reception unit 39 of the same indoor unit 2.
  • the reception process by self-reception can be performed independently of the process of step S5, that is, at an asynchronous timing. Details of the reception process by self reception will be described later.
  • the test signal may be any communication signal as long as the self-reception function can be confirmed, and may be any type of signal.
  • the signal generated by the transmission unit 38, that is, the test signal may be referred to as a "first signal" for convenience.
  • step S10 If the test signal can be received by itself (step S10, Yes), the process proceeds to step S11. If self-reception is possible, this means that in addition to the communication path between the indoor unit 2 and the outdoor unit 1 being correctly connected, each function of the transmitting unit 38 and the receiving unit 39 of the indoor unit 2 is normal. Do. That is, when self-reception is possible, it is determined that communication on the indoor unit 2 side is operating normally. Therefore, in step S11, the indoor unit 2 waits for reception of outdoor transmission.
  • outdoor transmission means a transmission operation performed by the outdoor unit 1 to the indoor unit 2. That is, step S11 is in a standby state as to whether or not the signal generated by the transmission unit 40 of the outdoor unit 1 can be received by the reception unit 39 of the indoor unit 2.
  • generated when performing outdoor transmission may be called a "2nd signal" for convenience.
  • step S12 it is determined again whether communication has been established between the outdoor unit 1 and the indoor unit 2. The determination as to whether or not the communication can be established is performed based on the result as to whether or not the reception unit 39 of the indoor unit 2 can receive the signal transmitted by the transmission unit 40 of the outdoor unit 1.
  • step S12 If communication can be established (Yes at step S12), the process proceeds to step S7.
  • the operations after step S7 are as described above, and the description here is omitted.
  • step S12 when communication can not be established (step S12, No), it progresses to step S13.
  • step S13 it is determined that the communication is abnormal, and the flow of FIG. 2 is exited.
  • step S10 if the indoor unit 2 can not receive the test signal itself (step S10, No), the process proceeds to step S14. If the test signal can not be received by itself, the communication path between the outdoor unit 1 and the indoor unit 2 may not be correctly connected, and the functions of the transmitting unit 38 and the receiving unit 39 of the indoor unit 2 may not be normal In addition to the nature, the functions of the transmission unit 40 and the reception unit 41 of the outdoor unit 1 may not be normal. Therefore, in step S14, the outdoor unit 1 is restarted. The restart is performed by turning on the outdoor start relay 8.
  • step S15 it is determined whether the number of restarts is within a specified number. If the number of restarts is within the specified number (Yes at step S15), the process returns to step S2 and repeats the process from step S2.
  • step S15 if the number of restarts exceeds the specified number (step S15, No), the process proceeds to step S16.
  • step S16 it is determined that the communication is abnormal, and the flow of FIG. 2 is exited.
  • step S10 the process of step S10 is prepared. This process prevents the commercial power from being re-applied to the outdoor unit 1 under the connected state in which the outdoor unit 1 can communicate. This makes it possible to suppress an unintended failure of the outdoor unit circuit under the condition where the communication circuit is formed.
  • step S15 is added.
  • a communication current supplied from the communication circuit power supply unit 18 flows between the power supply signal common line 25 and the signal line 26.
  • the communication current is a current used for communication between the outdoor unit 1 and the indoor unit 2.
  • the outdoor unit 1 and the indoor unit 2 communicate by detecting the state in which the current is flowing and the state in which the current is not flowing.
  • the transmitting unit 38 includes an element that switches the state of the path through which the communication current flows during internal and external communication to either the state through which the communication current flows or the state through which the communication current does not flow.
  • An example of the element is a photocoupler.
  • a path through which a communication current flows in internal and external communication will be referred to as a "current loop”.
  • the transmission unit 38 and the reception unit 39 of the indoor unit 2 and the transmission unit 40 and the reception unit 41 of the outdoor unit 1 are inserted in series between the power supply signal common line 25 and the signal line 26. It is formed.
  • the state in which the communication current flows in the current loop is referred to as “ON state” or simply “ON”, and the state in which no communication current flows is referred to as “OFF state” or simply “OFF”.
  • the transmission unit 38 performs control of ON or OFF of the current loop according to the control of the transmission control unit 50.
  • the transmission unit 38 transmits data to the outdoor unit 1 by control of ON or OFF of the current loop.
  • the receiving unit 39 includes an element for receiving data transmitted from the outdoor unit 1.
  • the receiving unit 39 receives data by detecting whether the communication current value flowing in the current loop is larger or smaller than the current threshold.
  • An example of the element is a photocoupler.
  • the receiving unit 39 outputs the reception result to the reception control unit 51.
  • the transmission control unit 50 controls ON or OFF of the transmission unit 38 in accordance with “0” or “1” of the transmission data.
  • the transmission unit 38 may be controlled to be ON or may be controlled to be OFF.
  • the transmission unit 38 may be controlled to be ON or may be controlled to be OFF.
  • the reception control unit 51 determines “0” or “1” of the reception data from the output of the reception unit 39.
  • the transmission unit 40 includes an element that switches the state of the current loop between the state in which the communication current flows and the state in which the communication current does not flow.
  • An example of the element is a photocoupler.
  • the transmission unit 40 performs control of ON or OFF of the current loop according to the control of the transmission control unit 60.
  • the transmission unit 40 transmits data to the indoor unit 2 by control of ON or OFF of the current loop.
  • the receiving unit 41 includes an element for receiving data transmitted from the indoor unit 2.
  • the receiving unit 41 receives data by detecting whether the communication current value flowing in the current loop is larger or smaller than the communication current threshold.
  • An example of the element is a photocoupler.
  • the receiving unit 41 outputs the output result to the reception control unit 61.
  • the transmission control unit 60 controls ON or OFF of the transmission unit 40 in accordance with “0” or “1” of the transmission data.
  • the transmission unit 40 may be controlled to be ON or may be controlled to be OFF.
  • the transmission unit 40 may be controlled to be ON or may be controlled to be OFF.
  • the reception control unit 61 determines “0” or “1” of the reception data from the output of the reception unit 41.
  • the flow of operation in the case of transmitting data from the outdoor unit 1 to the indoor unit 2 is as follows.
  • the transmission control unit 50 of the indoor unit 2 controls the transmission unit 38 of the indoor unit 2 in the ON state.
  • Step 1 The transmission control unit 60 of the outdoor unit 1 performs ON control or OFF control of the transmission unit 40 of the outdoor unit 1 based on “0” or “1” of the transmission data.
  • Step 2 The reception unit 39 of the indoor unit 2 outputs the reception result to the reception control unit 51 of the indoor unit 2.
  • Step 3 The reception control unit 51 of the indoor unit 2 determines "0" or "1" of the reception data from the input result.
  • movement in the case of transmitting data from the indoor unit 2 to the outdoor unit 1 is as follows.
  • the transmission control unit 60 of the outdoor unit 1 controls the transmission unit 40 of the outdoor unit 1 in the ON state.
  • Step 1 The transmission control unit 50 of the indoor unit 2 performs ON control or OFF control of the transmission unit 38 of the indoor unit 2 based on the transmission data “0” or “1”.
  • Step 2 The reception unit 41 of the outdoor unit 1 outputs the reception result to the reception control unit 61 of the outdoor unit 1.
  • Step 3 The reception control unit 61 of the outdoor unit 1 determines “0” or “1” of the reception data from the input result.
  • the timing at which the indoor unit 2 receives its own test signal is the timing at which the transmission control unit 60 of the outdoor unit 1 controls the transmission unit 40 of the outdoor unit 1 to be in the ON state.
  • Step 1 The transmission control unit 50 of the indoor unit 2 performs ON control or OFF control of the transmission unit 38 of the indoor unit 2 based on the transmission data “0” or “1”.
  • Step 2 The reception unit 39 of the indoor unit 2 outputs the reception result to the reception control unit 51 of the indoor unit 2.
  • Step 3 The reception control unit 51 of the indoor unit 2 determines "0" or "1" of the reception data from the input result.
  • FIG. 5 is a diagram for explaining the operation at the time of an instantaneous power failure.
  • the second inrush current prevention relay 13 is a relay for enhancing the possibility of the self recovery from the momentary power failure and for improving the convenience of the user.
  • bus voltage is a voltage of a DC bus connecting the outdoor rectification unit 9 and the inverter circuit unit 15, and corresponds to the voltage of the smoothing capacitor 14 in the example of FIG.
  • voltage of the smoothing capacitor 14 will be referred to as “bus voltage”.
  • the bus voltage is monitored by the outdoor control unit 16.
  • the bus voltage drops because some load is connected to the circuit. The greater the load, the faster the bus voltage decreases. Since the contact point of the power supply relay 12 is closed while the outdoor unit 1 is energized, the bus voltage instantaneously rises to the voltage obtained by smoothing the power supply voltage and returns when the power supply is restored immediately. On the other hand, when the power supply does not return, the bus voltage continues to decrease.
  • the bus voltage when the contacts of the second inrush current prevention relay 13 are closed may be a voltage Vth1 'which is lower than the first voltage threshold Vth1.
  • the outdoor control unit 16 connects the contacts of the second inrush current prevention relay 13 as long as the outdoor control unit 16 can operate even if the bus voltage continues to fall below the first voltage threshold Vth1 and continues to decrease. to continue.
  • the voltage of the smoothing capacitor 14 can be recovered along a path passing through the second inrush current prevention relay 13 and the inrush current prevention resistor 11.
  • the inrush current prevention resistor 11 since the inrush current prevention resistor 11 is used, the inrush current value can be limited, and the failure of the circuit in the subsequent stage, for example, the outdoor rectifier 9 due to an excessive inrush current can be prevented.
  • the outdoor control unit 16 confirms that the voltage is stabilized at the stable voltage V DD , then closes the contact of the power supply relay 12 and then the second rush The contact of the current prevention relay 13 is opened.
  • the charging current to the smoothing capacitor 14 is supplied to the smoothing capacitor 14 via the power supply relay 12 and never via the second inrush current preventing relay 13 .
  • the control operation described above makes it possible to reduce unnecessary power in the air conditioner 100.
  • FIG. 6 is a block diagram showing an example of the hardware configuration of the indoor control unit according to the embodiment.
  • FIG. 7 is a block diagram showing another example of the hardware configuration of the indoor control unit according to the embodiment.
  • a processor 200 for performing calculations a memory 202 for storing a program read by the processor 200, and input / output of signals
  • An interface 204 may be included.
  • the processor 200 may be an arithmetic unit such as an arithmetic unit, a microprocessor, a microcomputer, a central processing unit (CPU), or a digital signal processor (DSP).
  • the memory 202 may be a nonvolatile or volatile semiconductor memory such as a random access memory (RAM), a read only memory (ROM), a flash memory, an erasable programmable ROM (EPROM), or an electrically EPROM (EEPROM), a magnetic disk, or a flexible memory.
  • RAM random access memory
  • ROM read only memory
  • EPROM erasable programmable ROM
  • EEPROM electrically EPROM
  • a disc, an optical disc, a compact disc, a mini disc, a DVD (Digital Versatile Disc) can be exemplified.
  • the memory 202 stores a program for executing the function of the indoor control unit 4 and a table referred to by the processor 200.
  • the processor 200 transmits and receives necessary information through the interface 204, the processor 200 executes a program stored in the memory 202, and the processor 200 refers to a table stored in the memory 202 to perform the above-described arithmetic processing. It can be performed. An operation result by the processor 200 can be stored in the memory 202.
  • the processor 200 and the memory 202 shown in FIG. 6 may be replaced with the processing circuit 203 as shown in FIG.
  • the processing circuit 203 corresponds to a single circuit, a compound circuit, an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a combination thereof.
  • ASIC application specific integrated circuit
  • FPGA field-programmable gate array

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Abstract

An air conditioner (100) is provided with an indoor unit (2) and an outdoor unit (1). The indoor unit (2) starts up the outdoor unit (1). When the outdoor unit (1) is started up, the indoor unit (2) determines whether or not communication can be established between the outdoor unit (1) and the indoor unit (2). When the communication cannot be established, self-reception in which the indoor unit (2) receives a test signal generated by the indoor unit (2) is performed. The indoor unit (2) determines, on the basis of the result of the self-reception, whether or not to restart the outdoor unit (1).

Description

空気調和機Air conditioner
　本発明は、室内機と室外機とを備えた空気調和機に関する。 The present invention relates to an air conditioner provided with an indoor unit and an outdoor unit.
　空気調和機において、室内機と室外機とは、電源線、信号線及び電源信号共通線と称される３つのワイヤで接続される構成が一般的である。下記、特許文献１には、当該構成の空気調和機が開示されている。 In the air conditioner, the indoor unit and the outdoor unit are generally connected by three wires called a power supply line, a signal line, and a power supply signal common line. The air conditioner of the said structure is disclosed by the following, patent document 1. FIG.
　下記特許文献１に代表される従来の空気調和機は、電源投入時もしくは運転待機状態から運転を再開する際に、室内機から室外機へ商用電源を印加し、室外機の突入電流防止リレーを動作させて室外機を起動する。起動された室外機は、室内機との通信を開始して通信を確立させる。室内機と室外機との間で通信が確立できなかった場合、室内機から室外機へ商用電源を印加する制御を再度行い、通信の確立を試みる。 The conventional air conditioner represented by Patent Document 1 below applies commercial power from the indoor unit to the outdoor unit when resuming operation from the time of power on or operation standby state, and the inrush current prevention relay of the outdoor unit is Operate and start the outdoor unit. The started outdoor unit starts communication with the indoor unit to establish communication. If communication can not be established between the indoor unit and the outdoor unit, control for applying commercial power from the indoor unit to the outdoor unit is performed again to try to establish communication.
特開２０１０－２４３０５１号公報JP, 2010-243051, A
　上記の通り、従来の空気調和機では、室内機と室外機との間で通信が確立できなかった場合に、室内機から室外機へ商用電源を印加する制御を再度行っていた。ところが、室外機が通信できる接続状態下で室外機に商用電源が再印加されると、意図しない過大な電流が通信経路に流れて室外機回路が故障してしまう場合があるという問題があった。 As described above, in the conventional air conditioner, when communication can not be established between the indoor unit and the outdoor unit, control for applying commercial power from the indoor unit to the outdoor unit is performed again. However, there is a problem that when the commercial power is reapplied to the outdoor unit under a connected state where the outdoor unit can communicate, an unintended excessive current may flow in the communication path and the outdoor unit circuit may be broken. .
　本発明は、上記に鑑みてなされたものであって、商用電源の再印加によって起こり得る室外機回路の故障を抑止することができる空気調和機を得ることを目的とする。 This invention is made in view of the above, Comprising: It aims at obtaining the air conditioner which can suppress the failure of the outdoor unit circuit which may occur by reapplication of a commercial power source.
　上述した課題を解決し、目的を達成するため、本発明に係る空気調和機は、室内機及び室外機を備える。室内機は、室外機を起動する。室内機は、室外機を起動した際に、室外機との間で通信が確立できるか否かを判定する。通信が確立できなかった場合には、室内機が生成した第１の信号を室内機で受信する自己受信を行う。室内機は、自己受信の結果に基づいて、室外機を再起動するか否かを判定する。 In order to solve the problems described above and to achieve the object, an air conditioner according to the present invention includes an indoor unit and an outdoor unit. The indoor unit activates the outdoor unit. When the indoor unit starts up the outdoor unit, it determines whether communication can be established with the outdoor unit. If the communication can not be established, the indoor unit receives the first signal generated by the indoor unit and performs self reception. The indoor unit determines whether to restart the outdoor unit based on the result of self reception.
　本発明に係る空気調和機は、商用電源の再印加によって起こり得る室外機回路の故障を抑止することができるという効果を奏する。 ADVANTAGE OF THE INVENTION The air conditioner which concerns on this invention has an effect that the failure of the outdoor unit circuit which may occur by reapplication of a commercial power source can be suppressed.
実施の形態における空気調和機の電装系統を示すブロック図Block diagram showing the electrical system of the air conditioner according to the embodiment 実施の形態における空気調和機の要部動作を示すフローチャートFlow chart showing the main part operation of the air conditioner in the embodiment 実施の形態の空気調和機における室内通信回路部の構成例を示すブロック図Block diagram showing a configuration example of the indoor communication circuit unit in the air conditioner of the embodiment 実施の形態の空気調和機における室外通信回路部の構成例を示すブロック図Block diagram showing a configuration example of the outdoor communication circuit unit in the air conditioner of the embodiment 瞬時停電時の動作説明に供する図Diagram for explaining the operation at the momentary power failure 実施の形態の室内制御部におけるハードウェア構成の一例を示すブロック図Block diagram showing an example of the hardware configuration of the indoor control unit of the embodiment 実施の形態の室内制御部におけるハードウェア構成の他の例を示すブロック図Block diagram showing another example of the hardware configuration of the indoor control unit according to the embodiment
　以下に添付図面を参照し、本発明の実施の形態に係る空気調和機について詳細に説明する。なお、以下の実施の形態により、本発明が限定されるものではない。また、以下では、「物理的な接続」と「電気的な接続」とを区別することなく、単に「接続」と称して説明する。 Hereinafter, an air conditioner according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited by the following embodiments. Also, in the following description, “physical connection” and “electrical connection” are simply referred to as “connection” without distinction.
実施の形態．
　図１は、実施の形態における空気調和機の電装系統を示すブロック図である。図１に示すように、実施の形態における空気調和機１００は、室外機１と、室外機１を起動する室内機２とを備える。図１では、特に、室外機１が起動される前の接続状態を示している。 Embodiment.
FIG. 1 is a block diagram showing an electrical system of the air conditioner according to the embodiment. As shown in FIG. 1, an air conditioner 100 according to the embodiment includes an outdoor unit 1 and an indoor unit 2 for starting the outdoor unit 1. FIG. 1 particularly shows a connection state before the outdoor unit 1 is started.
　まず、図１を参照し、実施の形態における空気調和機１００の概括的な構成を説明する。室外機１と室内機２とは、電源線２４、電源信号共通線２５及び信号線２６の３線により接続される。室外機１は、３相交流電源３に接続される。室外機１には、電源線６５を介して３相交流電圧が印加される。一方、室内機２には、電源線６５のうちの２線から電源線２４及び電源信号共通線２５を介して単相交流電圧が印加される。すなわち、実施の形態における空気調和機１００は、室外機１には３相交流電源が給電され、室内機２には単相交流電源が給電される構成の空気調和機である。 First, a general configuration of the air conditioner 100 according to the embodiment will be described with reference to FIG. The outdoor unit 1 and the indoor unit 2 are connected by three lines of a power supply line 24, a power signal common line 25 and a signal line 26. The outdoor unit 1 is connected to a three-phase AC power supply 3. A three-phase AC voltage is applied to the outdoor unit 1 through the power supply line 65. On the other hand, a single-phase AC voltage is applied to the indoor unit 2 from two of the power supply lines 65 via the power supply line 24 and the power supply signal common line 25. That is, the air conditioner 100 according to the embodiment is an air conditioner configured such that a three-phase alternating current power supply is supplied to the outdoor unit 1 and a single-phase alternating current power supply is supplied to the indoor unit 2.
　室内機２は、室内制御部４と、室外起動リレー８とを備える。室外起動リレー８は、電源線２４と信号線２６との接続を開閉する。「接続を開閉」するとは、非接続状態と接続状態とを切り替えることである。室内制御部４は、室外起動リレー８を制御して、信号線２６と電源信号共通線２５との間に単相交流電源を供給させる。 The indoor unit 2 includes an indoor control unit 4 and an outdoor start relay 8. The outdoor start relay 8 opens and closes the connection between the power supply line 24 and the signal line 26. To "open and close the connection" is to switch between the disconnected state and the connected state. The indoor control unit 4 controls the outdoor start relay 8 to supply single-phase AC power between the signal line 26 and the power signal common line 25.
　室外機１は、室外整流部９と、第１の突入電流防止リレー１０と、電源供給リレー１２と、第２の突入電流防止リレー１３と、平滑コンデンサ１４と、インバータ回路部１５と、室外制御部１６とを備える。また、室外機１は、通信回路電源部１８と、室外通信回路部１９と、電源供給切替リレー２０と、突入電流防止リレー駆動部２１と、圧縮機８０とを備える。圧縮機８０は、インバータ回路部１５によって駆動される。 The outdoor unit 1 includes an outdoor rectification unit 9, a first inrush current prevention relay 10, a power supply relay 12, a second inrush current prevention relay 13, a smoothing capacitor 14, an inverter circuit unit 15, and outdoor control. And a unit 16. The outdoor unit 1 further includes a communication circuit power supply unit 18, an outdoor communication circuit unit 19, a power supply switching relay 20, an inrush current prevention relay driving unit 21, and a compressor 80. The compressor 80 is driven by the inverter circuit unit 15.
　室外機１において、室外整流部９は、電源供給リレー１２に接続される。電源供給リレー１２は、３相交流電源３と室外整流部９との間の接続を開閉する。室外整流部９は、３相交流電源３の出力を整流する。平滑コンデンサ１４は、室外整流部９の出力を平滑する。室外通信回路部１９は、電源信号共通線２５及び信号線２６を介して室内機２と通信する。電源供給切替リレー２０は、電源信号共通線２５と、通信回路電源部１８との間に接続される。突入電流防止リレー駆動部２１は、電源信号共通線２５と信号線２６との間に印加された単相交流電圧が、室内機２の室外起動リレー８と、電源供給切替リレー２０とを介して供給されたときに動作する。第１の突入電流防止リレー１０は、電源供給リレー１２と並列に接続され、突入電流防止リレー駆動部２１により制御される。第２の突入電流防止リレー１３は、第１の突入電流防止リレー１０と並列に接続され、室外制御部１６により制御される。 In the outdoor unit 1, the outdoor rectifying unit 9 is connected to the power supply relay 12. The power supply relay 12 opens and closes the connection between the three-phase AC power supply 3 and the outdoor rectification unit 9. The outdoor rectifier 9 rectifies the output of the three-phase AC power supply 3. The smoothing capacitor 14 smoothes the output of the outdoor rectifier 9. The outdoor communication circuit unit 19 communicates with the indoor unit 2 via the power supply signal common line 25 and the signal line 26. The power supply switching relay 20 is connected between the power signal common line 25 and the communication circuit power supply unit 18. Inrush current prevention relay drive unit 21 receives a single-phase AC voltage applied between power supply signal common line 25 and signal line 26 via outdoor start relay 8 of indoor unit 2 and power supply switching relay 20. Operate when supplied. The first inrush current prevention relay 10 is connected in parallel to the power supply relay 12, and is controlled by the inrush current prevention relay drive unit 21. The second inrush current prevention relay 13 is connected in parallel to the first inrush current prevention relay 10 and is controlled by the outdoor control unit 16.
　次に、実施の形態における空気調和機１００の更に詳細な構成について説明する。室外機１は、室外端子台２３を備える。室外端子台２３は、Ｒ端子２７、Ｓ端子２８、Ｔ端子２９、室外Ｓ１端子３０、室外Ｓ２端子３１及び室外Ｓ３端子３２を有する。Ｒ端子２７、Ｓ端子２８、及びＴ端子２９は、３相交流電源３に接続されている。３相交流電源３からの電力は、Ｒ端子２７、Ｓ端子２８及びＴ端子２９を介して室外機１に供給される。 Next, a more detailed configuration of the air conditioner 100 according to the embodiment will be described. The outdoor unit 1 includes an outdoor terminal block 23. The outdoor terminal block 23 has an R terminal 27, an S terminal 28, a T terminal 29, an outdoor S1 terminal 30, an outdoor S2 terminal 31, and an outdoor S3 terminal 32. The R terminal 27, the S terminal 28, and the T terminal 29 are connected to the three-phase alternating current power supply 3. Electric power from the three-phase AC power supply 3 is supplied to the outdoor unit 1 through the R terminal 27, the S terminal 28 and the T terminal 29.
　室外機１の内部では、室外Ｓ１端子３０とＲ端子２７とが接続されると共に、室外Ｓ２端子３１とＳ端子２８とが接続される。これらの接続により、通信回路電源部１８には、室外Ｓ１端子３０及び室外Ｓ２端子３１を介して単相交流による電力が供給される。なお、室外Ｓ１端子３０及び室外Ｓ２端子３１に供給される電力は、Ｒ端子２７及びＳ端子２８間の単相電力には限られず、３相交流電源３における何れか２相間の単相電力を使用することができる。 Inside the outdoor unit 1, the outdoor S1 terminal 30 and the R terminal 27 are connected, and the outdoor S2 terminal 31 and the S terminal 28 are connected. By these connections, the communication circuit power supply unit 18 is supplied with electric power by single-phase alternating current via the outdoor S1 terminal 30 and the outdoor S2 terminal 31. The power supplied to the outdoor S1 terminal 30 and the outdoor S2 terminal 31 is not limited to the single-phase power between the R terminal 27 and the S terminal 28. The single-phase power between any two phases in the three-phase AC power supply 3 It can be used.
　室内機２は、室内端子台２２を備える。室内端子台２２は、室内Ｓ１端子３３、室内Ｓ２端子３４及び室内Ｓ３端子３５を有する。室内Ｓ１端子３３は、電源線２４で室外Ｓ１端子３０と接続される。室内Ｓ２端子３４は、電源信号共通線２５で室外Ｓ２端子３１と接続される。室内Ｓ３端子３５は、信号線２６で室外Ｓ３端子３２と接続される。 The indoor unit 2 includes an indoor terminal block 22. The indoor terminal block 22 has an indoor S1 terminal 33, an indoor S2 terminal 34, and an indoor S3 terminal 35. The indoor S1 terminal 33 is connected to the outdoor S1 terminal 30 via the power supply line 24. The indoor S2 terminal 34 is connected to the outdoor S2 terminal 31 by the power signal common line 25. The indoor S3 terminal 35 is connected to the outdoor S3 terminal 32 by a signal line 26.
　室内機２は、上述した室内制御部４及び室外起動リレー８に加え、室内整流部５と、室内通信回路部６と、室内動作切替部７と、リモコン受信部３６とを備える。室外起動リレー８は、ａ端子、ｂ端子及びｃ端子を有する。ａ端子は、室内Ｓ１端子３３に接続される。ｂ端子は、室内通信回路部６に接続される。室外起動リレー８の基点であるｃ端子は、室内Ｓ３端子３５に接続される。室外起動リレー８の接点は、ａ端子及びｂ端子のうちの何れかに接続される。すなわち、室外起動リレー８は、室内Ｓ３端子３５を室内Ｓ１端子３３に接続するか、室内Ｓ３端子３５を室内通信回路部６に接続するかの切り替えを行う。 The indoor unit 2 includes an indoor rectification unit 5, an indoor communication circuit unit 6, an indoor operation switching unit 7, and a remote control reception unit 36, in addition to the indoor control unit 4 and the outdoor activation relay 8 described above. The outdoor start relay 8 has a terminal a, a terminal b and a terminal c. The a terminal is connected to the indoor S1 terminal 33. The b terminal is connected to the indoor communication circuit unit 6. The c terminal, which is the base point of the outdoor activation relay 8, is connected to the indoor S3 terminal 35. The contact point of the outdoor activation relay 8 is connected to any one of the a terminal and the b terminal. That is, the outdoor activation relay 8 switches whether the indoor S3 terminal 35 is connected to the indoor S1 terminal 33 or the indoor S3 terminal 35 is connected to the indoor communication circuit unit 6.
　なお、以下の説明では、便宜的に、室外起動リレー８の接点がａ端子に接続されている状態を「ＯＮ」と呼び、室外起動リレー８の接点がｂ端子に接続されている状態を「ＯＦＦ」と呼ぶ。 In the following description, for convenience, the state in which the contact of the outdoor start relay 8 is connected to the terminal a is referred to as “ON”, and the state in which the contact of the outdoor start relay 8 is connected to the terminal b Call it "OFF".
　室外起動リレー８がＯＦＦのとき、室外起動リレー８の接点はｂ端子に接続され、室外起動リレー８を介して室内Ｓ３端子３５と室内通信回路部６とが接続される。この接続により、電源信号共通線２５と信号線２６とを介して室外機１と室内機２との間の通信ラインが確立され、室外機１と室内機２との間で各種の運転信号が送受信される。 When the outdoor activation relay 8 is OFF, the contact of the outdoor activation relay 8 is connected to the b terminal, and the indoor S3 terminal 35 and the indoor communication circuit unit 6 are connected via the outdoor activation relay 8. By this connection, a communication line between the outdoor unit 1 and the indoor unit 2 is established through the power signal common line 25 and the signal line 26, and various operation signals are transmitted between the outdoor unit 1 and the indoor unit 2. It is sent and received.
　一方、室外起動リレー８がＯＮのとき、室外起動リレー８の接点はａ端子に接続され、室内Ｓ３端子３５と室内Ｓ１端子３３とが接続される。この接続により、電源信号共通線２５と信号線２６との間に単相交流による電力が供給される。 On the other hand, when the outdoor activation relay 8 is ON, the contact of the outdoor activation relay 8 is connected to the a terminal, and the indoor S3 terminal 35 and the indoor S1 terminal 33 are connected. By this connection, single-phase alternating current power is supplied between the power supply signal common line 25 and the signal line 26.
　室内Ｓ１端子３３は、室内整流部５に接続される。室内Ｓ２端子３４は、室内整流部５と、室内通信回路部６とに接続される。電源線２４と電源信号共通線２５との間に印加された単相交流電圧は、室内整流部５で直流電圧に変換され、室内制御部４に電力が供給される。 The indoor S1 terminal 33 is connected to the indoor rectification unit 5. The indoor S2 terminal 34 is connected to the indoor rectification unit 5 and the indoor communication circuit unit 6. The single-phase AC voltage applied between the power supply line 24 and the power supply signal common line 25 is converted into a DC voltage by the indoor rectification unit 5, and power is supplied to the indoor control unit 4.
　室内制御部４と接続された室内動作切替部７は、運転待機時に室外機１が消費する電力である待機電力を低減するか否かを判断する。図示の例は、待機電力を低減するか否かをジャンパー線で設定する例である。室内動作切替部７において、ｃ１端子とｃ２端子との間にジャンパー線が接続されていれば待機電力を低減し、ｃ２端子とｃ３端子との間にジャンパー線が接続されていれば、待機電力を低減しない。なお、待機電力を低減するか否かの切替方法は、ジャンパー線に限るものでなく、スイッチによる切替でもよい。 The indoor operation switching unit 7 connected to the indoor control unit 4 determines whether to reduce standby power, which is power consumed by the outdoor unit 1 at the time of operation standby. The illustrated example is an example in which whether to reduce standby power is set by a jumper wire. In the indoor operation switching unit 7, the standby power is reduced if a jumper wire is connected between the c1 terminal and the c2 terminal, and if a jumper wire is connected between the c2 terminal and the c3 terminal, the standby power Not reduce In addition, the switching method of whether to reduce standby power is not restricted to a jumper wire, and may be switching by a switch.
　リモコン受信部３６は、リモコン３７と室内制御部４とに接続される。リモコン受信部３６は、リモコン３７からの運転指令を受信し、受信した指令を室内制御部４に伝達する。 The remote control reception unit 36 is connected to the remote control 37 and the indoor control unit 4. The remote control reception unit 36 receives the operation command from the remote control 37 and transmits the received command to the indoor control unit 4.
　室外機１は、突入電流防止抵抗１１と、室外動作切替部１７とを更に備える。室外機１のＲ端子２７は、第１の突入電流防止リレー１０及び第２の突入電流防止リレー１３の各一端と、電源供給リレー１２における一端側の端子の１つであるａ端子とに接続される。第１の突入電流防止リレー１０及び第２の突入電流防止リレー１３の各他端は、突入電流防止抵抗１１の一端に接続される。突入電流防止抵抗１１の他端は、電源供給リレー１２の他端側の端子の１つであるｂ端子と、室外整流部９とに接続される。更に、第１の突入電流防止リレー１０及び第２の突入電流防止リレー１３の両端は、室外動作切替部１７に接続される。 The outdoor unit 1 further includes an inrush current prevention resistor 11 and an outdoor operation switching unit 17. The R terminal 27 of the outdoor unit 1 is connected to one end of each of the first inrush current preventing relay 10 and the second inrush current preventing relay 13 and the a terminal which is one of the terminals on the one end side of the power supply relay 12. Be done. The other ends of the first inrush current preventing relay 10 and the second inrush current preventing relay 13 are connected to one end of the inrush current preventing resistor 11. The other end of the inrush current prevention resistor 11 is connected to the b terminal, which is one of the terminals on the other end side of the power supply relay 12, and the outdoor rectifier 9. Further, both ends of the first inrush current prevention relay 10 and the second inrush current prevention relay 13 are connected to the outdoor operation switching unit 17.
　Ｓ端子２８は、電源供給リレー１２における一端側の端子の他の１つであるｃ端子に接続される。電源供給リレー１２における他端側の端子の他の１つであるｄ端子は、室外整流部９に接続される。Ｔ端子２９は、電源供給リレー１２を介さずに室外整流部９に接続される。 The S terminal 28 is connected to the c terminal, which is another one of the terminals on one end side of the power supply relay 12. Another terminal d of the other terminal of the power supply relay 12 is connected to the outdoor rectifier 9. The T terminal 29 is connected to the outdoor rectifier 9 without the power supply relay 12.
　なお、図１では、電源供給リレー１２の一端側の端子であるａ端子及びｃ端子は、Ｒ端子２７とＳ端子２８とにそれぞれ接続される例を示しているが、これに限定されない。Ｒ端子２７、Ｓ端子２８及びＴ端子２９のうちの何れかの２端子が、電源供給リレー１２のａ端子及びｃ端子に接続されていればよい。 Although FIG. 1 shows an example in which the a terminal and the c terminal, which are terminals on one end side of the power supply relay 12, are respectively connected to the R terminal 27 and the S terminal 28, it is not limited thereto. Any two terminals of the R terminal 27, the S terminal 28, and the T terminal 29 may be connected to the a terminal and the c terminal of the power supply relay 12.
　また、第１の突入電流防止リレー１０と第２の突入電流防止リレー１３との並列回路に突入電流防止抵抗１１を直列に接続した回路部における一端及び他端は、図１ではそれぞれａ端子及びｂ端子に接続されているが、これに限定されない。当該回路部における一端及び他端が、それぞれｃ端子及びｄ端子に接続されていてもよい。すなわち、当該回路部における一端及び他端が、電源供給リレー１２における何れか１接点の入出力と接続されていればよい。 Further, one end and the other end of the circuit portion in which the inrush current preventing resistor 11 is connected in series to the parallel circuit of the first inrush current preventing relay 10 and the second inrush current preventing relay 13 are terminal a in FIG. Although connected to the b terminal, it is not limited to this. One end and the other end of the circuit portion may be connected to the c terminal and the d terminal, respectively. That is, one end and the other end in the circuit section may be connected to the input and output of any one contact in the power supply relay 12.
　また、図１において、電源供給リレー１２は、２接点のリレーを示しているが、１接点のリレーが２つある構成でもよい。 Further, in FIG. 1, the power supply relay 12 is a two-contact relay, but may be configured to have two one-contact relays.
　室外整流部９は、３相交流電源３の交流電圧を整流して、任意の直流電圧に変換する。電源供給リレー１２及び第２の突入電流防止リレー１３は、室外制御部１６の制御によって動作し、動作しないときは、図１に示すように接点を開放している。 The outdoor rectifier 9 rectifies the AC voltage of the three-phase AC power supply 3 and converts it to any DC voltage. The power supply relay 12 and the second inrush current prevention relay 13 operate under the control of the outdoor control unit 16, and when they do not operate, the contacts are opened as shown in FIG.
　室外動作切替部１７は、第１の突入電流防止リレー１０の両端に接続されると共に、室外制御部１６にも接続されている。室外動作切替部１７は、運転待機時の待機電力を低減するか否かを判断する。図示の例は、待機電力を低減するか否かをジャンパー線で設定する例である。室外動作切替部１７において、ａ１端子とａ２端子との間にジャンパー線が接続されていれば、運転待機時の待機電力を低減する。一方、ｂ１端子とｂ２端子との間にジャンパー線が接続されていれば、これらｂ１端子，ｂ２端子によって、第１の突入電流防止リレー１０をバイパスする電流経路が形成される。このため、運転待機時の待機電力は低減されない。運転待機時の待機電力を低減するか否かの情報は、室外動作切替部１７から室外制御部１６に伝達される。 The outdoor operation switching unit 17 is connected to both ends of the first inrush current prevention relay 10 and is also connected to the outdoor control unit 16. The outdoor operation switching unit 17 determines whether to reduce the standby power during the operation standby. The illustrated example is an example in which whether to reduce standby power is set by a jumper wire. In the outdoor operation switching unit 17, if a jumper wire is connected between the a1 terminal and the a2 terminal, the standby power during operation standby is reduced. On the other hand, if a jumper wire is connected between the b1 terminal and the b2 terminal, the b1 terminal and the b2 terminal form a current path that bypasses the first inrush current prevention relay 10. For this reason, standby power at the time of standby is not reduced. Information on whether to reduce the standby power at the time of operation standby is transmitted from the outdoor operation switching unit 17 to the outdoor control unit 16.
　平滑コンデンサ１４の両端は、室外整流部９に接続されている。平滑コンデンサ１４によって平滑化された直流電圧は、インバータ回路部１５及び室外制御部１６に印加される。 Both ends of the smoothing capacitor 14 are connected to the outdoor rectifier 9. The DC voltage smoothed by the smoothing capacitor 14 is applied to the inverter circuit unit 15 and the outdoor control unit 16.
　電源供給切替リレー２０は、ａ端子、ｂ端子及びｃ端子を有する。ａ端子は、通信回路電源部１８に接続される。ｂ端子は、突入電流防止リレー駆動部２１に接続される。ｃ端子は、室外Ｓ２端子３１に接続される。電源供給切替リレー２０の基点であるｃ端子は、室外Ｓ２端子３１に接続される。電源供給切替リレー２０の接点は、ａ端子及びｂ端子のうちの何れかに接続される。すなわち、電源供給切替リレー２０は、室外Ｓ２端子３１を突入電流防止リレー駆動部２１に接続するか、室外Ｓ２端子３１を通信回路電源部１８に接続するかの切り替えを行う。 The power supply switching relay 20 has terminals a, b and c. The a terminal is connected to the communication circuit power supply unit 18. The b terminal is connected to the inrush current prevention relay drive unit 21. The c terminal is connected to the outdoor S2 terminal 31. The c terminal, which is the base point of the power supply switching relay 20, is connected to the outdoor S2 terminal 31. The contact point of the power supply switching relay 20 is connected to either the a terminal or the b terminal. That is, the power supply switching relay 20 switches whether to connect the outdoor S2 terminal 31 to the inrush current prevention relay drive unit 21 or to connect the outdoor S2 terminal 31 to the communication circuit power supply unit 18.
　なお、以下の説明では、便宜的に、電源供給切替リレー２０の接点がａ端子に接続されている状態を「ＯＮ」と呼び、電源供給切替リレー２０の接点がｂ端子に接続されている状態を「ＯＦＦ」と呼ぶ。 In the following description, for convenience, the state in which the contact of the power supply switching relay 20 is connected to the terminal a is referred to as “ON”, and the contact of the power supply switching relay 20 is connected to the terminal b Is called "OFF".
　室外制御部１６は、電源供給切替リレー２０を制御する。電源供給切替リレー２０がＯＦＦのとき、電源供給切替リレー２０の接点はｂ端子に接続され、電源供給切替リレー２０を介して室外Ｓ２端子３１と突入電流防止リレー駆動部２１とが接続される。この接続により、室内機２によって電源信号共通線２５と信号線２６との間に単相交流が通電されたとき、突入電流防止リレー駆動部２１が通電される。突入電流防止リレー駆動部２１が通電されると、第１の突入電流防止リレー１０の接点が閉じられる。 The outdoor control unit 16 controls the power supply switching relay 20. When the power supply switching relay 20 is off, the contact point of the power supply switching relay 20 is connected to the b terminal, and the outdoor S2 terminal 31 and the inrush current prevention relay drive unit 21 are connected via the power supply switching relay 20. By this connection, when single-phase alternating current is supplied between the power supply signal common line 25 and the signal line 26 by the indoor unit 2, the inrush current prevention relay drive unit 21 is supplied with current. When the inrush current prevention relay drive unit 21 is energized, the contacts of the first inrush current prevention relay 10 are closed.
　一方、電源供給切替リレー２０がＯＮのとき、電源供給切替リレー２０の接点はａ端子に接続される。このとき、電源供給切替リレー２０を介して、室外Ｓ２端子３１が通信回路電源部１８に接続される。通信回路電源部１８は、電源線２４と電源信号共通線２５との間に印加された単相交流電圧から直流電圧を生成し、室外通信回路部１９に直流電圧を印加する。直流電圧の生成は、半波整流回路又は全波整流回路により実現できるが、他の回路を用いてもよい。 On the other hand, when the power supply switching relay 20 is ON, the contact of the power supply switching relay 20 is connected to the a terminal. At this time, the outdoor S2 terminal 31 is connected to the communication circuit power supply unit 18 via the power supply switching relay 20. The communication circuit power supply unit 18 generates a DC voltage from the single phase AC voltage applied between the power supply line 24 and the power supply signal common line 25, and applies a DC voltage to the outdoor communication circuit unit 19. Although the generation of the DC voltage can be realized by a half wave rectification circuit or a full wave rectification circuit, other circuits may be used.
　インバータ回路部１５は、室外制御部１６によって制御され、印加された直流電圧を任意周波数及び任意電圧の交流電圧に変換する。インバータ回路部１５は、変換した交流電圧を圧縮機８０に印加し、圧縮機８０を駆動する。 The inverter circuit unit 15 is controlled by the outdoor control unit 16 and converts the applied DC voltage into an AC voltage of an arbitrary frequency and an arbitrary voltage. The inverter circuit unit 15 applies the converted AC voltage to the compressor 80 to drive the compressor 80.
　次に、空気調和機１００の運転待機時の動作について図１を参照して説明する。まず、Ｒ端子２７、Ｓ端子２８及びＴ端子２９を介して、室外機１に３相交流電源３の電力が供給される。ここで、運転待機時においては、第１の突入電流防止リレー１０、第２の突入電流防止リレー１３及び電源供給リレー１２の接点が開いているため、室外機負荷であるインバータ回路部１５、室外動作切替部１７及び室外制御部１６へは、電力は供給されない。 Next, the operation of the air conditioner 100 in the operation standby mode will be described with reference to FIG. First, the electric power of the three-phase AC power supply 3 is supplied to the outdoor unit 1 through the R terminal 27, the S terminal 28 and the T terminal 29. Here, since the contacts of the first inrush current prevention relay 10, the second inrush current prevention relay 13, and the power supply relay 12 are open in the operation standby mode, the inverter circuit unit 15, which is an outdoor unit load, is outdoors Power is not supplied to the operation switching unit 17 and the outdoor control unit 16.
　通信回路電源部１８は、一端が室外Ｓ１端子３０を介して電源線２４に接続されているが、もう一端が電源供給切替リレー２０により室外Ｓ２端子３１との接続が切れている。このため、通信回路電源部１８には、電力が供給されない。その結果、室外通信回路部１９にも電力が供給されない。突入電流防止リレー駆動部２１は、一端が室外Ｓ２端子３１を介して電源信号共通線２５に接続されているが、もう一端は室外Ｓ３端子３２を介して信号線２６に接続されているので、電力が供給されない。 One end of the communication circuit power supply unit 18 is connected to the power supply line 24 through the outdoor S1 terminal 30, and the other end is disconnected from the outdoor S2 terminal 31 by the power supply switching relay 20. Therefore, no power is supplied to the communication circuit power supply unit 18. As a result, power is not supplied to the outdoor communication circuit unit 19 either. The rush current prevention relay drive unit 21 has one end connected to the power signal common line 25 via the outdoor S2 terminal 31 and the other end connected to the signal line 26 via the outdoor S3 terminal 32. Power is not supplied.
　以上の動作態様により、運転待機時においては、インバータ回路部１５、室外制御部１６、室外動作切替部１７、通信回路電源部１８及び室外通信回路部１９には電力が供給されず、室外機１での運転待機電力は低減されている。 In the operation standby mode, the inverter circuit unit 15, the outdoor control unit 16, the outdoor operation switching unit 17, the communication circuit power supply unit 18, and the outdoor communication circuit unit 19 are not supplied with power, and thus the outdoor unit 1 is operated. The standby power at is reduced.
　次に、空気調和機１００が運転動作に入るまでの動作を説明する。電源線２４と電源信号共通線２５を介して、３相交流電源３からの電力が室内機２に供給されると、室内制御部４に電力が供給され、室内機２は起動される。起動後、室内動作切替部７の設定が確認される。図示の例では、ｃ１端子とｃ２端子にジャンパー線が接続されているので、運転待機時の待機電力を低減する空気調和機と認識される。室内制御部４は、リモコン受信部３６を介してリモコン３７からの運転指令を待ち受ける状態に移行する。 Next, an operation until the air conditioner 100 starts the driving operation will be described. When the electric power from the three-phase AC power supply 3 is supplied to the indoor unit 2 through the power supply line 24 and the power supply signal common line 25, the electric power is supplied to the indoor control unit 4, and the indoor unit 2 is started. After startup, the setting of the indoor operation switching unit 7 is confirmed. In the illustrated example, a jumper wire is connected to the terminals c1 and c2, so it is recognized as an air conditioner that reduces standby power during standby for operation. The indoor control unit 4 shifts to a state of waiting for the operation command from the remote control 37 via the remote control reception unit 36.
　室内制御部４がリモコン３７からの運転指令信号を受けると、室内制御部４は、室外起動リレー８をＯＮ動作させ、室外機１を起動する。このとき、室内Ｓ３端子３５と室内通信回路部６との接続が切り離され、室内Ｓ３端子３５と室内Ｓ１端子３３との接続に切り替えられる。この制御によって、室外Ｓ２端子３１と室外Ｓ３端子３２との間に単相交流電圧が印加される。 When the indoor control unit 4 receives the operation command signal from the remote control 37, the indoor control unit 4 turns on the outdoor activation relay 8 to activate the outdoor unit 1. At this time, the connection between the indoor S3 terminal 35 and the indoor communication circuit unit 6 is disconnected, and the connection between the indoor S3 terminal 35 and the indoor S1 terminal 33 is switched. By this control, a single phase AC voltage is applied between the outdoor S2 terminal 31 and the outdoor S3 terminal 32.
　室外Ｓ２端子３１と室外Ｓ３端子３２との間に電力が供給されると、電源供給切替リレー２０を介して突入電流防止リレー駆動部２１が通電され、第１の突入電流防止リレー１０の接点が閉じられる。第１の突入電流防止リレー１０の接点が閉じられることで、３相交流電源３からの交流電圧が室外整流部９で直流電圧に変換される。変換された直流電圧は、平滑コンデンサ１４とインバータ回路部１５とに印加される。 When power is supplied between the outdoor S2 terminal 31 and the outdoor S3 terminal 32, the inrush current prevention relay drive unit 21 is energized through the power supply switching relay 20, and the contact point of the first inrush current prevention relay 10 is It is closed. When the contacts of the first inrush current prevention relay 10 are closed, the AC voltage from the three-phase AC power supply 3 is converted to a DC voltage by the outdoor rectifier 9. The converted DC voltage is applied to the smoothing capacitor 14 and the inverter circuit unit 15.
　ここで、第１の突入電流防止リレー１０を通る電源供給経路では、突入電流防止抵抗１１が経路内に挿入されているので、突入電流を防ぐことができる。直流電圧の印加によって、室外制御部１６が起動する。室外制御部１６は、起動後に第２の突入電流防止リレー１３の接点を閉じる。室外制御部１６は、平滑コンデンサ１４に充電された電圧を監視し、設定電圧で安定したことを確認した後、電源供給リレー１２の接点を閉じる。その後、室外制御部１６は、第２の突入電流防止リレー１３の接点を開放する。なお、第２の突入電流防止リレー１３は、瞬時停電時からの自己復帰の可能性を高め、利用者の利便性の向上を図るためのリレーである。瞬時停電とは、外部からの電源供給が一時的に途絶える現象である。第２の突入電流防止リレー１３における瞬時停電時の動作については、後述する。 Here, in the power supply path passing through the first inrush current prevention relay 10, since the inrush current prevention resistor 11 is inserted in the path, the inrush current can be prevented. The outdoor control unit 16 is activated by the application of the DC voltage. The outdoor control unit 16 closes the contact of the second inrush current prevention relay 13 after activation. The outdoor control unit 16 monitors the voltage charged in the smoothing capacitor 14, and after confirming that the voltage is stabilized at the set voltage, closes the contact of the power supply relay 12. Thereafter, the outdoor control unit 16 opens the contact of the second inrush current prevention relay 13. The second inrush current prevention relay 13 is a relay for enhancing the possibility of the self recovery from the momentary power failure and for improving the convenience of the user. The instantaneous power failure is a phenomenon in which the external power supply is temporarily interrupted. The operation at the time of instantaneous power failure in the second inrush current prevention relay 13 will be described later.
　室内制御部４は、室外起動リレー８をＯＮ動作させてから任意の設定時間を経過した後に、室外起動リレー８をＯＦＦ動作させる。このとき、室内Ｓ３端子３５と室内Ｓ１端子３３との接続が切り離され、室内Ｓ３端子３５と室内通信回路部６との接続に切り替えられる。この制御によって、室外Ｓ２端子３１と室外Ｓ３端子３２との間に印加されていた単相交流電圧は遮断され、突入電流防止リレー駆動部２１は非通電となる。その結果、第１の突入電流防止リレー１０の接点は開放される。この動作によって、室外機起動動作における突入電流を防ぐことができる。 The indoor control unit 4 turns off the outdoor activation relay 8 after an arbitrary set time has elapsed after the outdoor activation relay 8 is turned on. At this time, the connection between the indoor S3 terminal 35 and the indoor S1 terminal 33 is disconnected, and the connection is switched to the connection between the indoor S3 terminal 35 and the indoor communication circuit unit 6. By this control, the single-phase AC voltage applied between the outdoor S2 terminal 31 and the outdoor S3 terminal 32 is shut off, and the rush current prevention relay drive unit 21 is deenergized. As a result, the contacts of the first inrush current prevention relay 10 are opened. This operation can prevent inrush current in the outdoor unit startup operation.
　突入電流防止リレー駆動部２１が非通電になると、室外制御部１６は、電源供給切替リレー２０をＯＮ動作させて、室外Ｓ２端子３１と突入電流防止リレー駆動部２１との接続を開放し、室外Ｓ２端子３１と通信回路電源部１８との接続に切り替える。この制御により、室外Ｓ１端子３０と室外Ｓ２端子３１との間に印加された単相交流電圧が通信回路電源部１８に印加される。通信回路電源部１８は、単相交流電圧を任意の直流電圧に変換して室外通信回路部１９に印加する。 When the inrush current prevention relay drive unit 21 is deenergized, the outdoor control unit 16 turns on the power supply switching relay 20 to open the connection between the outdoor S2 terminal 31 and the inrush current prevention relay drive unit 21 and perform the outdoor operation. The connection is switched to the connection between the S2 terminal 31 and the communication circuit power supply unit 18. By this control, a single-phase AC voltage applied between the outdoor S1 terminal 30 and the outdoor S2 terminal 31 is applied to the communication circuit power supply unit 18. The communication circuit power supply unit 18 converts a single-phase AC voltage into an arbitrary DC voltage and applies it to the outdoor communication circuit unit 19.
　なお、上記の説明では、室内制御部４による室外起動リレー８のＯＦＦ動作の後に、第１の突入電流防止リレー１０がＯＦＦ動作する手順であったが、この順番を逆に入れ替え、先に電源供給切替リレー２０をＯＮ動作させてもよい。電源供給切替リレー２０をＯＮ動作させた場合、突入電流防止リレー駆動部２１が非通電になり、第１の突入電流防止リレー１０がＯＦＦ動作となるので、順番を入れ替えても室外機１の起動は可能となる。 In the above description, the first inrush current preventing relay 10 is turned OFF after the OFF operation of the outdoor start relay 8 by the indoor control unit 4. However, the order is reversed and the power supply is first The supply switching relay 20 may be turned on. When the power supply switching relay 20 is turned on, the inrush current prevention relay drive unit 21 is deenergized, and the first inrush current prevention relay 10 is turned off. Therefore, even if the order is changed, the outdoor unit 1 is started. Is possible.
　次に、実施の形態における空気調和機１００の要部動作について、図１から図４の図面を参照して説明する。図２は、実施の形態における空気調和機１００の要部動作を示すフローチャートである。図３は、実施の形態の空気調和機１００における室内通信回路部６の構成例を示すブロック図である。図４は、実施の形態の空気調和機１００における室外通信回路部１９の構成例を示すブロック図である。 Next, the main part operation | movement of the air conditioner 100 in embodiment is demonstrated with reference to drawing of FIGS. 1-4. FIG. 2 is a flowchart showing the operation of the main part of the air conditioner 100 according to the embodiment. FIG. 3 is a block diagram showing a configuration example of the indoor communication circuit unit 6 in the air conditioner 100 of the embodiment. FIG. 4 is a block diagram showing a configuration example of the outdoor communication circuit unit 19 in the air conditioner 100 of the embodiment.
　図３に示すように、室内通信回路部６は、送信部３８と、受信部３９と、送信制御部５０と、受信制御部５１とを備える。送信部３８及び受信部３９は直列に接続され、電源信号共通線２５と信号線２６との間に挿入される。 As shown in FIG. 3, the indoor communication circuit unit 6 includes a transmission unit 38, a reception unit 39, a transmission control unit 50, and a reception control unit 51. The transmitting unit 38 and the receiving unit 39 are connected in series, and inserted between the power supply signal common line 25 and the signal line 26.
　また、図４に示すように、室外通信回路部１９は、送信部４０と、受信部４１と、送信制御部６０と、受信制御部６１とを備える。送信部４０及び受信部４１は直列に接続され、電源信号共通線２５と信号線２６との間に挿入される。 Further, as shown in FIG. 4, the outdoor communication circuit unit 19 includes a transmission unit 40, a reception unit 41, a transmission control unit 60, and a reception control unit 61. The transmitting unit 40 and the receiving unit 41 are connected in series and inserted between the power supply signal common line 25 and the signal line 26.
　ステップＳ１では、室内機２が起動される。上述のように、室内機２の起動は、室内機２に３相交流電源３からの電力が供給されることで行われる。 In step S1, the indoor unit 2 is activated. As described above, startup of the indoor unit 2 is performed by supplying power from the three-phase AC power supply 3 to the indoor unit 2.
　ステップＳ２では、室外起動リレー８がＯＮの状態に制御される。この制御により、室内Ｓ３端子３５と室内Ｓ１端子３３とが接続され、室外Ｓ２端子３１と室外Ｓ３端子３２との間に単相交流電圧が印加される。なお、室外Ｓ２端子３１と室外Ｓ３端子３２との間に単相交流電圧が印加されると、室外機１が起動される。 In step S2, the outdoor activation relay 8 is controlled to be in the ON state. By this control, the indoor S3 terminal 35 and the indoor S1 terminal 33 are connected, and a single-phase AC voltage is applied between the outdoor S2 terminal 31 and the outdoor S3 terminal 32. When a single-phase AC voltage is applied between the outdoor S2 terminal 31 and the outdoor S3 terminal 32, the outdoor unit 1 is activated.
　また、室外起動リレー８がＯＮの状態に制御された後、室外起動リレー８は、ＯＦＦの状態に戻される。これにより、室内Ｓ３端子３５と室内Ｓ１端子３３との接続は開放され、室内Ｓ３端子３５と室内通信回路部６との接続に切り替えられる。 In addition, after the outdoor activation relay 8 is controlled to be in the ON state, the outdoor activation relay 8 is returned to the OFF state. Thus, the connection between the indoor S3 terminal 35 and the indoor S1 terminal 33 is released, and the connection between the indoor S3 terminal 35 and the indoor communication circuit unit 6 is switched.
　ステップＳ３では、電源供給切替リレー２０がＯＮの状態に制御される。これにより、室外Ｓ２端子３１と突入電流防止リレー駆動部２１との接続は開放され、室外Ｓ２端子３１と通信回路電源部１８との接続に切り替えられる。その結果、通信回路電源部１８に単相交流電圧が印加される。 In step S3, the power supply switching relay 20 is controlled to be ON. Thus, the connection between the outdoor S2 terminal 31 and the inrush current prevention relay drive unit 21 is released, and the connection between the outdoor S2 terminal 31 and the communication circuit power supply unit 18 is switched. As a result, a single-phase AC voltage is applied to the communication circuit power supply unit 18.
　ステップＳ４では、通信回路電源部１８への電源供給が行われる。通信回路電源部１８への電源供給が行われると、通信回路電源部１８は、単相交流電圧を任意の直流電圧に変換して室外通信回路部１９に印加する。 In step S4, power supply to the communication circuit power supply unit 18 is performed. When the power supply to the communication circuit power supply unit 18 is performed, the communication circuit power supply unit 18 converts the single-phase AC voltage into an arbitrary DC voltage and applies it to the outdoor communication circuit unit 19.
　ステップＳ５では、室外機１と室内機２との間で通信が開始される。ステップＳ５の通信は、室外機１の主動で行われる。すなわち、室外機１がマスターで、室内機２がスレーブの関係にある。室外機１と室内機２との間で行われる通信動作の詳細については後述する。 In step S5, communication is started between the outdoor unit 1 and the indoor unit 2. The communication of step S5 is performed by the main action of the outdoor unit 1. That is, the outdoor unit 1 is a master, and the indoor unit 2 is a slave. The details of the communication operation performed between the outdoor unit 1 and the indoor unit 2 will be described later.
　ステップＳ６では、室外機１と室内機２との間で通信が確立できるか否かが判定される。通信が確立できた場合（ステップＳ６，Ｙｅｓ）、ステップＳ７に進む。ステップＳ７では、室外機１と室内機２との間で定常通信が行われる。定常通信では、空気調和機１００の制御に必要な各種情報が授受される。 In step S6, it is determined whether communication can be established between the outdoor unit 1 and the indoor unit 2. If communication can be established (Yes at step S6), the process proceeds to step S7. In step S7, steady-state communication is performed between the outdoor unit 1 and the indoor unit 2. In steady-state communication, various information necessary for control of the air conditioner 100 is exchanged.
　ステップＳ８において、室外機１の室外制御部１６は、室内機２からの運転開始指令を受け入れて、暖房運転又は冷房運転の動作を開始する。 In step S8, the outdoor control unit 16 of the outdoor unit 1 receives the operation start command from the indoor unit 2 and starts the operation of the heating operation or the cooling operation.
　一方、通信が確立できなかった場合（ステップＳ６，Ｎｏ）、ステップＳ９の処理に進む。ステップＳ９は、通信経路の確認処理であり、ステップＳ１０からステップＳ１６の処理を含む。前述したように、室外機１が通信できる接続状態下で室外機１に商用電源が再印加されると、意図しない過大な電流が通信経路に流れて室外機回路が故障してしまう場合がある。このため、ステップＳ９の処理が追加されている。 On the other hand, if communication can not be established (No at step S6), the process proceeds to step S9. Step S9 is communication path confirmation processing, and includes processing from step S10 to step S16. As described above, when the commercial power is reapplied to the outdoor unit 1 under a connected state in which the outdoor unit 1 can communicate, an unintended excessive current may flow in the communication path and the outdoor unit circuit may be broken. . Therefore, the process of step S9 is added.
　ステップＳ１０では、室内機２において、テスト信号の送信が行われ、自己受信できるか否かが判定される。ここで、自己受信とは、室内機２の送信部３８が生成した信号を、同じ室内機２の受信部３９で受信する処理を意味する。自己受信による受信処理は、ステップＳ５の処理とは、独立して、すなわち非同期のタイミングで行うことができる。自己受信による受信処理の詳細については、後述する。テスト信号は、自己受信の機能が確認できる通信信号であればよく、どのような形式の信号でもよい。なお、送信部３８が生成した信号、すなわちテスト信号を便宜的に「第１の信号」と呼ぶ場合がある。 In step S10, the test signal is transmitted in the indoor unit 2, and it is determined whether self-reception can be performed. Here, the self reception means a process of receiving the signal generated by the transmission unit 38 of the indoor unit 2 by the reception unit 39 of the same indoor unit 2. The reception process by self-reception can be performed independently of the process of step S5, that is, at an asynchronous timing. Details of the reception process by self reception will be described later. The test signal may be any communication signal as long as the self-reception function can be confirmed, and may be any type of signal. The signal generated by the transmission unit 38, that is, the test signal may be referred to as a "first signal" for convenience.
　テスト信号を自己受信できた場合（ステップＳ１０，Ｙｅｓ）、ステップＳ１１に進む。自己受信できた場合、室内機２と室外機１との間の通信経路が正しく接続されていることに加え、室内機２の送信部３８及び受信部３９の各機能が正常であることを意味する。すなわち、自己受信できた場合には、室内機２の側の通信は正常動作していると判定する。このため、ステップＳ１１では、室内機２において、室外送信の受信を待つ。ここで、室外送信とは、室外機１が室内機２に対して行う送信動作を意味する。すなわち、ステップＳ１１は、室外機１の送信部４０が生成した信号が室内機２の受信部３９で受信できるか否かの待機状態となる。なお、室外送信を行う際に生成される信号を便宜的に「第２の信号」と呼ぶ場合がある。 If the test signal can be received by itself (step S10, Yes), the process proceeds to step S11. If self-reception is possible, this means that in addition to the communication path between the indoor unit 2 and the outdoor unit 1 being correctly connected, each function of the transmitting unit 38 and the receiving unit 39 of the indoor unit 2 is normal. Do. That is, when self-reception is possible, it is determined that communication on the indoor unit 2 side is operating normally. Therefore, in step S11, the indoor unit 2 waits for reception of outdoor transmission. Here, outdoor transmission means a transmission operation performed by the outdoor unit 1 to the indoor unit 2. That is, step S11 is in a standby state as to whether or not the signal generated by the transmission unit 40 of the outdoor unit 1 can be received by the reception unit 39 of the indoor unit 2. In addition, the signal produced | generated when performing outdoor transmission may be called a "2nd signal" for convenience.
　ステップＳ１１の後、ステップＳ１２に進む。ステップＳ１２では、再度、室外機１と室内機２との間で通信が確立できたか否かが判定される。通信が確立できたか否かの判定は、室外機１の送信部４０が送信した信号を室内機２の受信部３９が受信できたか否かの結果に基づいて行う。 After step S11, the process proceeds to step S12. In step S12, it is determined again whether communication has been established between the outdoor unit 1 and the indoor unit 2. The determination as to whether or not the communication can be established is performed based on the result as to whether or not the reception unit 39 of the indoor unit 2 can receive the signal transmitted by the transmission unit 40 of the outdoor unit 1.
　通信が確立できた場合（ステップＳ１２，Ｙｅｓ）、ステップＳ７に進む。ステップＳ７以降の動作は前述の通りであり、ここでの説明は割愛する。 If communication can be established (Yes at step S12), the process proceeds to step S7. The operations after step S7 are as described above, and the description here is omitted.
　一方、通信が確立できなかった場合（ステップＳ１２，Ｎｏ）、ステップＳ１３に進む。ステップＳ１３では、通信異常である旨の判定が下され、図２のフローを抜け出る。 On the other hand, when communication can not be established (step S12, No), it progresses to step S13. In step S13, it is determined that the communication is abnormal, and the flow of FIG. 2 is exited.
　ステップＳ１０の判定処理に戻り、室内機２において、テスト信号を自己受信できなかった場合（ステップＳ１０，Ｎｏ）、ステップＳ１４に進む。テスト信号を自己受信できない場合には、室外機１と室内機２との間の通信経路が正しく接続されていない可能性と、室内機２の送信部３８及び受信部３９の機能が正常でない可能性とに加え、室外機１の送信部４０及び受信部４１の機能が正常でない可能性がある。そこで、ステップＳ１４では、室外機１の再起動が行われる。再起動は、室外起動リレー８をＯＮすることによって行われる。 Returning to the determination process of step S10, if the indoor unit 2 can not receive the test signal itself (step S10, No), the process proceeds to step S14. If the test signal can not be received by itself, the communication path between the outdoor unit 1 and the indoor unit 2 may not be correctly connected, and the functions of the transmitting unit 38 and the receiving unit 39 of the indoor unit 2 may not be normal In addition to the nature, the functions of the transmission unit 40 and the reception unit 41 of the outdoor unit 1 may not be normal. Therefore, in step S14, the outdoor unit 1 is restarted. The restart is performed by turning on the outdoor start relay 8.
　ステップＳ１４の後、ステップＳ１５に進む。ステップＳ１５では、再起動回数が規定回数以内であるか否かが判定される。再起動回数が規定回数以内であれば（ステップＳ１５，Ｙｅｓ）、ステップＳ２に戻り、ステップＳ２からの処理を繰り返す。 After step S14, the process proceeds to step S15. In step S15, it is determined whether the number of restarts is within a specified number. If the number of restarts is within the specified number (Yes at step S15), the process returns to step S2 and repeats the process from step S2.
　一方、再起動回数が規定回数を超えていれば（ステップＳ１５，Ｎｏ）、ステップＳ１６に進む。ステップＳ１６では、通信異常である旨の判定が下され、図２のフローを抜け出る。 On the other hand, if the number of restarts exceeds the specified number (step S15, No), the process proceeds to step S16. In step S16, it is determined that the communication is abnormal, and the flow of FIG. 2 is exited.
　上述の通り、図２のフローチャートでは、ステップＳ１０の処理が準備されている。この処理により、室外機１が通信できる接続状態下において、室外機１に商用電源が再印加されることが抑止される。これにより、通信回路が形成されている状態下において、室外機回路の意図しない故障の抑止が可能となる。 As described above, in the flowchart of FIG. 2, the process of step S10 is prepared. This process prevents the commercial power from being re-applied to the outdoor unit 1 under the connected state in which the outdoor unit 1 can communicate. This makes it possible to suppress an unintended failure of the outdoor unit circuit under the condition where the communication circuit is formed.
　また、図２のフローチャートでは、ステップＳ１５の処理が付加されている。この処理により、偶然的な要因で再起動できないといった事象を排除できるので、通信異常である旨の判定精度を高めることができる。 Further, in the flowchart of FIG. 2, the process of step S15 is added. By this processing, since it is possible to exclude an event that the restart can not be performed due to an accidental factor, it is possible to enhance the determination accuracy of the communication abnormality.
　次に、室外機１と室内機２との間で行われる通信動作について説明する。以下、室外機１と室内機２との間の通信を、適宜「内外通信」と呼ぶ。 Next, the communication operation performed between the outdoor unit 1 and the indoor unit 2 will be described. Hereinafter, communication between the outdoor unit 1 and the indoor unit 2 will be appropriately referred to as "internal / external communication".
　電源信号共通線２５と信号線２６との間には、通信回路電源部１８から供給される通信電流が流れる。通信電流は、室外機１と室内機２との間の通信に用いる電流である。室外機１及び室内機２は、電流が流れている状態と流れていない状態とを検出することで、通信を行う。 A communication current supplied from the communication circuit power supply unit 18 flows between the power supply signal common line 25 and the signal line 26. The communication current is a current used for communication between the outdoor unit 1 and the indoor unit 2. The outdoor unit 1 and the indoor unit 2 communicate by detecting the state in which the current is flowing and the state in which the current is not flowing.
　送信部３８は、内外通信の際に通信電流が流れる経路の状態を、通信電流が流れる状態と、流れない状態との何れかに切り替える素子を含む。当該素子の一例は、フォトカプラである。以下、内外通信の際に通信電流が流れる経路を「カレントループ」と呼ぶ。カレントループは、室内機２の送信部３８及び受信部３９と、室外機１の送信部４０及び受信部４１とが電源信号共通線２５と信号線２６との間で直列に挿入されることで形成される。なお、以下の説明において、カレントループに通信電流が流れる状態を「ＯＮ状態」又は単に「ＯＮ」と呼び、通信電流が流れない状態を「ＯＦＦ状態」又は単に「ＯＦＦ」と呼ぶ。 The transmitting unit 38 includes an element that switches the state of the path through which the communication current flows during internal and external communication to either the state through which the communication current flows or the state through which the communication current does not flow. An example of the element is a photocoupler. Hereinafter, a path through which a communication current flows in internal and external communication will be referred to as a "current loop". In the current loop, the transmission unit 38 and the reception unit 39 of the indoor unit 2 and the transmission unit 40 and the reception unit 41 of the outdoor unit 1 are inserted in series between the power supply signal common line 25 and the signal line 26. It is formed. In the following description, the state in which the communication current flows in the current loop is referred to as “ON state” or simply “ON”, and the state in which no communication current flows is referred to as “OFF state” or simply “OFF”.
　室内機２において、送信部３８は、送信制御部５０の制御に従って、カレントループのＯＮ又はＯＦＦの制御を行う。送信部３８は、カレントループのＯＮ又はＯＦＦの制御によって室外機１にデータを送信する。 In the indoor unit 2, the transmission unit 38 performs control of ON or OFF of the current loop according to the control of the transmission control unit 50. The transmission unit 38 transmits data to the outdoor unit 1 by control of ON or OFF of the current loop.
　また、室内機２において、受信部３９は、室外機１から送信されるデータを受信する素子を含む。受信部３９は、カレントループに流れる通信電流値が電流閾値よりも大きいか又は小さいかを検出することでデータを受信する。当該素子の一例は、フォトカプラである。受信部３９は、受信結果を受信制御部５１に出力する。 In the indoor unit 2, the receiving unit 39 includes an element for receiving data transmitted from the outdoor unit 1. The receiving unit 39 receives data by detecting whether the communication current value flowing in the current loop is larger or smaller than the current threshold. An example of the element is a photocoupler. The receiving unit 39 outputs the reception result to the reception control unit 51.
　送信制御部５０は、送信データの「０」又は「１」に応じて、送信部３８のＯＮ又はＯＦＦの制御を行う。送信データが「０」のときに、送信部３８がＯＮに制御されてもよいし、ＯＦＦに制御されてもよい。送信データが「１」のときに、送信部３８がＯＮに制御されてもよいし、ＯＦＦに制御されてもよい。 The transmission control unit 50 controls ON or OFF of the transmission unit 38 in accordance with “0” or “1” of the transmission data. When the transmission data is "0", the transmission unit 38 may be controlled to be ON or may be controlled to be OFF. When the transmission data is “1”, the transmission unit 38 may be controlled to be ON or may be controlled to be OFF.
　受信制御部５１は、受信部３９の出力から受信データの「０」又は「１」を判断する。 The reception control unit 51 determines “0” or “1” of the reception data from the output of the reception unit 39.
　室外機１において、送信部４０は、カレントループの状態を、通信電流が流れる状態と、流れない状態との何れかに切り替える素子を含む。当該素子の一例は、フォトカプラである。送信部４０は、送信制御部６０の制御に従って、カレントループのＯＮ又はＯＦＦの制御を行う。送信部４０は、カレントループのＯＮ又はＯＦＦの制御によって室内機２にデータを送信する。 In the outdoor unit 1, the transmission unit 40 includes an element that switches the state of the current loop between the state in which the communication current flows and the state in which the communication current does not flow. An example of the element is a photocoupler. The transmission unit 40 performs control of ON or OFF of the current loop according to the control of the transmission control unit 60. The transmission unit 40 transmits data to the indoor unit 2 by control of ON or OFF of the current loop.
　また、室外機１において、受信部４１は、室内機２から送信されるデータを受信する素子を含む。受信部４１は、カレントループに流れる通信電流値が通信電流閾値よりも大きいか又は小さいかを検出することでデータを受信する。当該素子の一例は、フォトカプラである。受信部４１は、出力結果を受信制御部６１に出力する。 Further, in the outdoor unit 1, the receiving unit 41 includes an element for receiving data transmitted from the indoor unit 2. The receiving unit 41 receives data by detecting whether the communication current value flowing in the current loop is larger or smaller than the communication current threshold. An example of the element is a photocoupler. The receiving unit 41 outputs the output result to the reception control unit 61.
　送信制御部６０は、送信データの「０」又は「１」に応じて、送信部４０のＯＮ又はＯＦＦの制御を行う。送信データが「０」のときに、送信部４０がＯＮに制御されてもよいし、ＯＦＦに制御されてもよい。送信データが「１」のときに、送信部４０がＯＮに制御されてもよいし、ＯＦＦに制御されてもよい。 The transmission control unit 60 controls ON or OFF of the transmission unit 40 in accordance with “0” or “1” of the transmission data. When the transmission data is "0", the transmission unit 40 may be controlled to be ON or may be controlled to be OFF. When the transmission data is “1”, the transmission unit 40 may be controlled to be ON or may be controlled to be OFF.
　受信制御部６１は、受信部４１の出力から受信データの「０」又は「１」を判断する。 The reception control unit 61 determines “0” or “1” of the reception data from the output of the reception unit 41.
　室外機１から室内機２へデータを送信する場合の動作の流れは、以下の通りである。なお、室内機２が室外機１からのデータを受信する場合、室内機２の送信制御部５０は、室内機２の送信部３８をＯＮ状態に制御しておく。 The flow of operation in the case of transmitting data from the outdoor unit 1 to the indoor unit 2 is as follows. When the indoor unit 2 receives data from the outdoor unit 1, the transmission control unit 50 of the indoor unit 2 controls the transmission unit 38 of the indoor unit 2 in the ON state.
　ステップ１：室外機１の送信制御部６０は、送信データの「０」又は「１」に基づいて、室外機１の送信部４０のＯＮ制御又はＯＦＦ制御を行う。
　ステップ２：室内機２の受信部３９は、受信結果を室内機２の受信制御部５１に出力する。
　ステップ３：室内機２の受信制御部５１は、入力結果から受信データの「０」又は「１」を判断する。 Step 1: The transmission control unit 60 of the outdoor unit 1 performs ON control or OFF control of the transmission unit 40 of the outdoor unit 1 based on “0” or “1” of the transmission data.
Step 2: The reception unit 39 of the indoor unit 2 outputs the reception result to the reception control unit 51 of the indoor unit 2.
Step 3: The reception control unit 51 of the indoor unit 2 determines "0" or "1" of the reception data from the input result.
　また、室内機２から室外機１へデータを送信する場合の動作の流れは、以下の通りである。なお、室外機１が室内機２からのデータを受信する場合、室外機１の送信制御部６０は、室外機１の送信部４０をＯＮ状態に制御しておく。 Moreover, the flow of the operation | movement in the case of transmitting data from the indoor unit 2 to the outdoor unit 1 is as follows. When the outdoor unit 1 receives data from the indoor unit 2, the transmission control unit 60 of the outdoor unit 1 controls the transmission unit 40 of the outdoor unit 1 in the ON state.
　ステップ１：室内機２の送信制御部５０は、送信データの「０」又は「１」に基づいて、室内機２の送信部３８のＯＮ制御又はＯＦＦ制御を行う。
　ステップ２：室外機１の受信部４１は、受信結果を室外機１の受信制御部６１に出力する。
　ステップ３：室外機１の受信制御部６１は、入力結果から受信データの「０」又は「１」を判断する。 Step 1: The transmission control unit 50 of the indoor unit 2 performs ON control or OFF control of the transmission unit 38 of the indoor unit 2 based on the transmission data “0” or “1”.
Step 2: The reception unit 41 of the outdoor unit 1 outputs the reception result to the reception control unit 61 of the outdoor unit 1.
Step 3: The reception control unit 61 of the outdoor unit 1 determines “0” or “1” of the reception data from the input result.
　また、室内機２がテスト信号を自己受信する場合の動作の流れは、以下の通りである。なお、室内機２が自己のテスト信号を自己受信するタイミングは、室外機１の送信制御部６０によって、室外機１の送信部４０がＯＮ状態に制御されるタイミングである。 Moreover, the flow of operation | movement in case the indoor unit 2 self-receives a test signal is as follows. The timing at which the indoor unit 2 receives its own test signal is the timing at which the transmission control unit 60 of the outdoor unit 1 controls the transmission unit 40 of the outdoor unit 1 to be in the ON state.
　ステップ１：室内機２の送信制御部５０は、送信データの「０」又は「１」に基づいて、室内機２の送信部３８のＯＮ制御又はＯＦＦ制御を行う。
　ステップ２：室内機２の受信部３９は、受信結果を室内機２の受信制御部５１に出力する。
　ステップ３：室内機２の受信制御部５１は、入力結果から受信データの「０」又は「１」を判断する。 Step 1: The transmission control unit 50 of the indoor unit 2 performs ON control or OFF control of the transmission unit 38 of the indoor unit 2 based on the transmission data “0” or “1”.
Step 2: The reception unit 39 of the indoor unit 2 outputs the reception result to the reception control unit 51 of the indoor unit 2.
Step 3: The reception control unit 51 of the indoor unit 2 determines "0" or "1" of the reception data from the input result.
　次に、第２の突入電流防止リレー１３における瞬時停電時の動作について、図１及び図５の図面を参照して説明する。図５は、瞬時停電時の動作説明に供する図である。上述したように、第２の突入電流防止リレー１３は、瞬時停電時からの自己復帰の可能性を高め、利用者の利便性の向上を図るためのリレーである。 Next, the operation of the second inrush current prevention relay 13 at the time of instantaneous power failure will be described with reference to FIGS. 1 and 5. FIG. 5 is a diagram for explaining the operation at the time of an instantaneous power failure. As described above, the second inrush current prevention relay 13 is a relay for enhancing the possibility of the self recovery from the momentary power failure and for improving the convenience of the user.
　図５において、左側には電源供給リレー１２のシーケンス動作を、右側には第２の突入電流防止リレー１３のシーケンス動作を、母線電圧との関係で示している。なお、ここでいう「母線電圧」とは、室外整流部９とインバータ回路部１５とを繋ぐ直流母線の電圧であり、図１の例では平滑コンデンサ１４の電圧に一致する。以下の説明では、「平滑コンデンサ１４の電圧」を「母線電圧」と称して説明する。 In FIG. 5, the left side shows the sequence operation of the power supply relay 12 and the right side shows the sequence operation of the second inrush current prevention relay 13 in relation to the bus voltage. Here, the “bus voltage” is a voltage of a DC bus connecting the outdoor rectification unit 9 and the inverter circuit unit 15, and corresponds to the voltage of the smoothing capacitor 14 in the example of FIG. In the following description, “voltage of the smoothing capacitor 14” will be referred to as “bus voltage”.
　前述の通り、母線電圧は、室外制御部１６で監視されている。電源供給が途絶えると、回路には何らかの負荷が接続されているため、母線電圧が低下する。負荷が大きいほど母線電圧の低下速度は速い。室外機１の通電中には、電源供給リレー１２の接点が閉じているので、電源供給が直ちに復帰すれば、母線電圧は、瞬時に電源電圧を平滑した電圧まで上昇して復帰する。一方、電源供給が復帰しないときは、母線電圧は低下を続ける。 As described above, the bus voltage is monitored by the outdoor control unit 16. When the power supply is interrupted, the bus voltage drops because some load is connected to the circuit. The greater the load, the faster the bus voltage decreases. Since the contact point of the power supply relay 12 is closed while the outdoor unit 1 is energized, the bus voltage instantaneously rises to the voltage obtained by smoothing the power supply voltage and returns when the power supply is restored immediately. On the other hand, when the power supply does not return, the bus voltage continues to decrease.
　そこで、母線電圧が第１の電圧閾値Ｖｔｈ１よりも低下したとき、電源供給リレー１２の接点を開放し、続いて第２の突入電流防止リレー１３の接点を閉じる。なお、シーケンス動作であるため、第２の突入電流防止リレー１３の接点が閉じられるときの母線電圧は、第１の電圧閾値Ｖｔｈ１よりもさらに低下した電圧Ｖｔｈ１’となることもある。 Therefore, when the bus voltage drops below the first voltage threshold Vth1, the contacts of the power supply relay 12 are opened and then the contacts of the second inrush current prevention relay 13 are closed. Since the sequence operation is performed, the bus voltage when the contacts of the second inrush current prevention relay 13 are closed may be a voltage Vth1 'which is lower than the first voltage threshold Vth1.
　母線電圧が第１の電圧閾値Ｖｔｈ１を下回り、さらに低下し続けても、室外制御部１６が動作できる電圧である限り、室外制御部１６は、第２の突入電流防止リレー１３の接点を接続し続ける。室外制御部１６が動作可能な電圧で電源が復帰すると、第２の突入電流防止リレー１３及び突入電流防止抵抗１１を通る経路で平滑コンデンサ１４の電圧が回復できる。また、突入電流防止抵抗１１を介するため、突入電流値を制限でき、過大な突入電流による、後段の回路、例えば室外整流部９の故障を防ぐことができる。 The outdoor control unit 16 connects the contacts of the second inrush current prevention relay 13 as long as the outdoor control unit 16 can operate even if the bus voltage continues to fall below the first voltage threshold Vth1 and continues to decrease. to continue. When the power is restored at a voltage at which the outdoor control unit 16 can operate, the voltage of the smoothing capacitor 14 can be recovered along a path passing through the second inrush current prevention relay 13 and the inrush current prevention resistor 11. In addition, since the inrush current prevention resistor 11 is used, the inrush current value can be limited, and the failure of the circuit in the subsequent stage, for example, the outdoor rectifier 9 due to an excessive inrush current can be prevented.
　母線電圧が回復して電源電圧が安定電圧ＶＤＤに復帰すると、室外制御部１６は、安定電圧ＶＤＤで安定したことを確認した後、電源供給リレー１２の接点を閉じ、次いで第２の突入電流防止リレー１３の接点を開放する。３相交流電源３からの電源供給が続いている限り、平滑コンデンサ１４への充電電流は電源供給リレー１２経由で平滑コンデンサ１４に供給され、第２の突入電流防止リレー１３を経由することはない。以上の制御動作により、空気調和機１００における不要電力の低減が可能となる。 When the bus voltage recovers and the power supply voltage recovers to the stable voltage V DD , the outdoor control unit 16 confirms that the voltage is stabilized at the stable voltage V DD , then closes the contact of the power supply relay 12 and then the second rush The contact of the current prevention relay 13 is opened. As long as the power supply from the three-phase AC power supply 3 continues, the charging current to the smoothing capacitor 14 is supplied to the smoothing capacitor 14 via the power supply relay 12 and never via the second inrush current preventing relay 13 . The control operation described above makes it possible to reduce unnecessary power in the air conditioner 100.
　最後に、実施の形態における室内制御部４の機能を実現するためのハードウェア構成について、図６及び図７の図面を参照して説明する。図６は、実施の形態の室内制御部におけるハードウェア構成の一例を示すブロック図である。図７は、実施の形態の室内制御部におけるハードウェア構成の他の例を示すブロック図である。 Finally, a hardware configuration for realizing the function of the indoor control unit 4 in the embodiment will be described with reference to the drawings of FIGS. 6 and 7. FIG. 6 is a block diagram showing an example of the hardware configuration of the indoor control unit according to the embodiment. FIG. 7 is a block diagram showing another example of the hardware configuration of the indoor control unit according to the embodiment.
　実施の形態における室内制御部４の機能を実現する場合には、図６に示すように、演算を行うプロセッサ２００、プロセッサ２００によって読みとられるプログラムが保存されるメモリ２０２、及び信号の入出力を行うインタフェース２０４を含む構成とすることができる。 In order to realize the function of the indoor control unit 4 in the embodiment, as shown in FIG. 6, a processor 200 for performing calculations, a memory 202 for storing a program read by the processor 200, and input / output of signals An interface 204 may be included.
　プロセッサ２００は、演算装置、マイクロプロセッサ、マイクロコンピュータ、ＣＰＵ（Ｃｅｎｔｒａｌ　Ｐｒｏｃｅｓｓｉｎｇ　Ｕｎｉｔ）、又はＤＳＰ（Ｄｉｇｉｔａｌ　Ｓｉｇｎａｌ　Ｐｒｏｃｅｓｓｏｒ）といった演算手段であってもよい。また、メモリ２０２には、ＲＡＭ（Ｒａｎｄｏｍ　Ａｃｃｅｓｓ　Ｍｅｍｏｒｙ）、ＲＯＭ（Ｒｅａｄ　Ｏｎｌｙ　Ｍｅｍｏｒｙ）、フラッシュメモリ、ＥＰＲＯＭ（Ｅｒａｓａｂｌｅ　Ｐｒｏｇｒａｍｍａｂｌｅ　ＲＯＭ）、ＥＥＰＲＯＭ（Ｅｌｅｃｔｒｉｃａｌｌｙ　ＥＰＲＯＭ）といった不揮発性又は揮発性の半導体メモリ、磁気ディスク、フレキシブルディスク、光ディスク、コンパクトディスク、ミニディスク、ＤＶＤ（Ｄｉｇｉｔａｌ　Ｖｅｒｓａｔｉｌｅ　Ｄｉｓｃ）を例示することができる。 The processor 200 may be an arithmetic unit such as an arithmetic unit, a microprocessor, a microcomputer, a central processing unit (CPU), or a digital signal processor (DSP). The memory 202 may be a nonvolatile or volatile semiconductor memory such as a random access memory (RAM), a read only memory (ROM), a flash memory, an erasable programmable ROM (EPROM), or an electrically EPROM (EEPROM), a magnetic disk, or a flexible memory. A disc, an optical disc, a compact disc, a mini disc, a DVD (Digital Versatile Disc) can be exemplified.
　メモリ２０２には、室内制御部４の機能を実行するプログラム及びプロセッサ２００によって参照されるテーブルが格納されている。プロセッサ２００は、インタフェース２０４を介して必要な情報を授受し、メモリ２０２に格納されたプログラムをプロセッサ２００が実行し、メモリ２０２に格納されたテーブルをプロセッサ２００が参照することにより、上述した演算処理を行うことができる。プロセッサ２００による演算結果は、メモリ２０２に記憶することができる。 The memory 202 stores a program for executing the function of the indoor control unit 4 and a table referred to by the processor 200. The processor 200 transmits and receives necessary information through the interface 204, the processor 200 executes a program stored in the memory 202, and the processor 200 refers to a table stored in the memory 202 to perform the above-described arithmetic processing. It can be performed. An operation result by the processor 200 can be stored in the memory 202.
　また、図６に示すプロセッサ２００及びメモリ２０２は、図７のように処理回路２０３に置き換えてもよい。処理回路２０３は、単一回路、複合回路、ＡＳＩＣ（Ａｐｐｌｉｃａｔｉｏｎ　Ｓｐｅｃｉｆｉｃ　Ｉｎｔｅｇｒａｔｅｄ　Ｃｉｒｃｕｉｔ）、ＦＰＧＡ（Ｆｉｅｌｄ－Ｐｒｏｇｒａｍｍａｂｌｅ　Ｇａｔｅ　Ａｒｒａｙ）、又は、これらを組み合わせたものが該当する。 Further, the processor 200 and the memory 202 shown in FIG. 6 may be replaced with the processing circuit 203 as shown in FIG. The processing circuit 203 corresponds to a single circuit, a compound circuit, an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a combination thereof.
　なお、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 shown in the above embodiment shows an example of the content of the present invention, and can be combined with another known technique, and a configuration without departing from the scope of the present invention It is also possible to omit or change part of.
　１　室外機、２　室内機、３　３相交流電源、４　室内制御部、５　室内整流部、６　室内通信回路部、７　室内動作切替部、８　室外起動リレー、９　室外整流部、１０　第１の突入電流防止リレー、１１　突入電流防止抵抗、１２　電源供給リレー、１３　第２の突入電流防止リレー、１４　平滑コンデンサ、１５　インバータ回路部、１６　室外制御部、１７　室外動作切替部、１８　通信回路電源部、１９　室外通信回路部、２０　電源供給切替リレー、２１　突入電流防止リレー駆動部、２２　室内端子台、２３　室外端子台、２４　電源線、２５　電源信号共通線、２６　信号線、２７　Ｒ端子、２８　Ｓ端子、２９　Ｔ端子、３０　室外Ｓ１端子、３１　室外Ｓ２端子、３２　室外Ｓ３端子、３３　室内Ｓ１端子、３４　室内Ｓ２端子、３５　室内Ｓ３端子、３６　リモコン受信部、３７　リモコン、３８，４０　送信部、３９，４１　受信部、５０，６０　送信制御部、５１，６１　受信制御部、６５　電源線、８０　圧縮機、１００　空気調和機、２００　プロセッサ、２０２　メモリ、２０３　処理回路、２０４　インタフェース。 DESCRIPTION OF SYMBOLS 1 outdoor unit, 2 indoor unit, 3 3 phase AC power supply, 4 indoor control part, 5 indoor rectification part, 6 indoor communication circuit part, 7 indoor operation switching part, 8 outdoor starting relay, 9 outdoor rectification part, 10 1st Inrush current preventing relay, 11 inrush current preventing resistor, 12 power supply relay, 13 second inrush current preventing relay, 14 smoothing capacitor, 15 inverter circuit unit, 16 outdoor control unit, 17 outdoor operation switching unit, 18 communication circuit power supply unit , 19 outdoor communication circuit unit, 20 power supply switching relay, 21 rush current prevention relay drive unit, 22 indoor terminal block, 23 outdoor terminal block, 24 power supply line, 25 power supply signal common line, 26 signal line, 27 R terminal, 28 S terminal, 29 T terminal, 30 outdoor S1 terminal, 31 outdoor S2 terminal, 32 outdoor S3 terminal, 33 indoor S1 terminal, 34 rooms S2 terminal, 35 indoor S3 terminal, 36 remote control receiver, 37 remote control, 38, 40 transmitter, 39, 41 receiver, 50, 60 transmission controller, 51, 61 reception controller, 65 power line, 80 compressor, 100 air conditioner, 200 processor, 202 memory, 203 processing circuit, 204 interface.

Claims (4)

  1. 　室内機及び室外機を備え、前記室内機が前記室外機を起動する空気調和機であって、
    　前記室内機は、前記室外機を起動した際に、前記室外機との間で通信が確立できるか否かを判定し、通信が確立できなかった場合には、前記室内機が生成した第１の信号を前記室内機で受信する自己受信を行い、前記自己受信の結果に基づいて、前記室外機を再起動するか否かを判定する
    　ことを特徴とする空気調和機。     An air conditioner comprising an indoor unit and an outdoor unit, wherein the indoor unit activates the outdoor unit,
    The indoor unit determines whether communication can be established with the outdoor unit when the outdoor unit is activated, and if communication can not be established, the first unit generated by the indoor unit An air conditioner comprising: receiving a signal from the indoor unit by the indoor unit; and determining whether to restart the outdoor unit based on a result of the self-reception.
  2. 　前記室内機は、前記自己受信において、前記第１の信号を受信できた場合、前記室内機の側の通信は正常動作していると判定することを特徴とする請求項１に記載の空気調和機。 The air conditioning according to claim 1, wherein, when the indoor unit can receive the first signal in the self reception, the communication on the side of the indoor unit is determined to be operating normally. Machine.
  3. 　前記室内機は、前記自己受信において、前記第１の信号を受信できた場合、前記室外機が生成した第２の信号を受信するために待機し、前記第２の信号を受信できなかった場合には、通信異常であると判定することを特徴とする請求項１に記載の空気調和機。 When the indoor unit can receive the first signal in the self reception, it stands by to receive a second signal generated by the outdoor unit, and can not receive the second signal The air conditioner according to claim 1, wherein it is determined that the communication is abnormal.
  4. 　前記室内機と前記室外機とは、電源線、電源信号共通線及び信号線の３線で接続され、
    　前記室内機及び前記室外機はそれぞれが送信部及び受信部を備え、
    　前記室内機の送信部及び受信部と、前記室外機の送信部及び受信部とが、前記電源信号共通線と前記信号線との間に直列に挿入されることでカレントループが形成され、
    　前記室内機及び前記室外機は、前記カレントループに流れる通信電流を検出することにより通信を行う
    　ことを特徴とする請求項１から３の何れか１項に記載の空気調和機。     The indoor unit and the outdoor unit are connected by three lines of a power supply line, a power supply signal common line, and a signal line,
    Each of the indoor unit and the outdoor unit includes a transmitter and a receiver.
    A current loop is formed by inserting the transmitting unit and the receiving unit of the indoor unit and the transmitting unit and the receiving unit of the outdoor unit in series between the power supply signal common line and the signal line,
    The air conditioner according to any one of claims 1 to 3, wherein the indoor unit and the outdoor unit perform communication by detecting a communication current flowing through the current loop.
PCT/JP2017/032562 2017-09-08 2017-09-08 Air conditioner WO2019049330A1 (en)

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