WO2017195365A1 - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
WO2017195365A1
WO2017195365A1 PCT/JP2016/064362 JP2016064362W WO2017195365A1 WO 2017195365 A1 WO2017195365 A1 WO 2017195365A1 JP 2016064362 W JP2016064362 W JP 2016064362W WO 2017195365 A1 WO2017195365 A1 WO 2017195365A1
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerant
air conditioner
floor
control board
sensor
Prior art date
Application number
PCT/JP2016/064362
Other languages
French (fr)
Japanese (ja)
Inventor
健太 野村
鈴木　洋平
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 PCT/JP2016/064362 priority Critical patent/WO2017195365A1/en
Priority to JP2018516324A priority patent/JP6587743B2/en
Priority to CN201680085455.5A priority patent/CN109073263A/en
Priority to EP16901713.4A priority patent/EP3457043B1/en
Publication of WO2017195365A1 publication Critical patent/WO2017195365A1/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
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • 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
    • F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/005—Arrangement or mounting of control or safety devices of safety devices
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/005—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted on the floor; standing on the floor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/12—Inflammable refrigerants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/222—Detecting refrigerant leaks

Definitions

  • the present invention relates to an air conditioner including a floor-mounted indoor unit and a refrigerant sensor that detects refrigerant leaked on the floor-mounted indoor unit side.
  • Fluorocarbon refrigerants have stable physical properties and are easy to handle, but have a high global warming potential and adversely affect the global environment. Therefore, hydrocarbon refrigerants such as propane or propylene, which are natural refrigerants with low global warming potential, are chlorofluorocarbons. It is attracting attention as an alternative to refrigerants. However, since the hydrocarbon-based refrigerant has combustibility, when applied to an air conditioner, the refrigerant leaked from the air conditioner may reach a combustible concentration. Therefore, in an air conditioner, it is desirable to detect refrigerant leakage at an early stage and take some measures so that the leaked refrigerant does not reach a flammable concentration.
  • a floor-mounted indoor unit disclosed in Patent Literature 1 includes a control board that performs overall control of devices such as a blower fan, a fan motor, and a compressor, and a remote controller that allows a user to monitor the operation, operating state, and abnormality content of the air conditioner. Is provided.
  • the refrigerant sensor is connected to the control board via a wiring including a signal line.
  • a refrigerant sensor is installed at the lower part of the machine room. This is because the specific gravity of the hydrocarbon-based refrigerant is larger than the specific gravity of air, and the concentration of the leaked refrigerant can be effectively measured by installing a refrigerant sensor in the lower part of the machine room.
  • the refrigerant sensor detects refrigerant leaked from the components of the refrigeration cycle such as heat exchangers and union joints, and the floor-standing indoor unit operates the blower fan to diffuse the refrigerant when the concentration reaches a certain value or more. By doing so, the refrigerant concentration is prevented from rising to the flammable concentration.
  • the floor-mounted indoor unit disclosed in Patent Document 1 has a function of displaying the abnormal content on the remote controller in order to notify the user of the content of various abnormalities occurring in the air conditioner.
  • Abnormal contents include refrigerant leakage information indicating that the refrigerant has leaked, communication abnormality information indicating that an abnormality has occurred in communication between the indoor unit and the outdoor unit, and a refrigerant detection signal output from the refrigerant sensor.
  • the disconnection abnormality information indicating that a disconnection has occurred in the signal line transmitting the signal can be exemplified.
  • the conventional floor-standing indoor unit represented by Patent Document 1 is configured to display on the remote controller refrigerant leakage information having a higher priority than information such as communication abnormality and disconnection abnormality. This is to notify the user that the refrigerant has leaked before the refrigerant concentration rises to the flammable concentration, thereby encouraging ventilation of the room where the air conditioner is installed, or by operating the air conditioner by user operation. This is because the refrigerant is forced to diffuse by operating. Accordingly, when the signal line is disconnected after the refrigerant leakage is detected, the disconnection abnormality is not displayed on the remote controller and only the refrigerant leakage information is displayed.
  • the present invention has been made in view of the above, and an object of the present invention is to obtain an air conditioner that can improve workability of measures against disconnection abnormality without impairing measures against leakage of a flammable refrigerant.
  • an air conditioner includes a floor-mounted indoor unit, a control board that is installed in the floor-mounted indoor unit and controls the floor-mounted indoor unit, and a floor-mounted indoor unit.
  • the refrigerant sensor that is installed in the indoor unit and outputs a detection signal whose on-duty is changed according to the detected refrigerant concentration, and the signal transmission path that is installed in the floor-mounted indoor unit and transmits the detection signal to the control board are disconnected.
  • a light emitting unit that changes to a second lighting state indicating that the signal transmission path is not disconnected.
  • the air conditioner according to the present invention has an effect that it is possible to improve workability of measures against disconnection abnormality without impairing measures against leakage of flammable refrigerant.
  • FIG. 1 is an external view of an air conditioner according to an embodiment of the present invention.
  • Interior view of the floor-mounted indoor unit shown in FIG. The figure which shows the connection state of the remote control with which the air conditioner which concerns on embodiment of this invention is equipped, a control board, a relay board, and a refrigerant
  • FIG. 1 is an external view of an air conditioner according to an embodiment of the present invention.
  • the air conditioner 100 includes an outdoor unit 1, a floor-mounted indoor unit 2 connected to the outdoor unit 1, and a pipe 3 through which the outdoor unit 1 and the floor-mounted indoor unit 2 are connected to each other to flow a refrigerant.
  • a flammable hydrocarbon-based refrigerant is used.
  • the floor-standing indoor unit 2 includes a housing 20, a front panel 21 installed in front of the housing 20, and a remote controller 22.
  • the remote controller 22 may be simply referred to as “remote controller 22”.
  • the housing 20 is a hollow box, and a front opening is formed on the front surface of the housing 20.
  • a front panel 21 is detachably attached to the front opening of the housing 20.
  • the front panel 21 is provided with an air suction port 21 a formed on the lower side of the front panel 21 and an air outlet port 21 b formed on the upper side of the front panel 21.
  • the front panel 21 is provided with a remote controller 22 between the air inlet 21a and the air outlet 21b.
  • the remote controller 22 is a user interface for the user to operate the air conditioner 100, and for the user to monitor the operation state and details of the abnormality of the air conditioner 100.
  • Examples of the driving operation include an operation for starting the operation of the air conditioner 100, an operation for stopping the operation of the air conditioner 100, and an operation for switching the operation mode.
  • refrigerant leakage information indicating that the refrigerant has leaked from the components constituting the refrigeration cycle of the air conditioner 100 and communication between the floor-standing indoor unit 2 and the outdoor unit 1 indicate that an abnormality has occurred.
  • Communication abnormality information and disconnection abnormality information indicating that a disconnection has occurred in a signal line to be described later can be exemplified.
  • the remote controller 22 includes a display unit 22a that displays these operating states and details of the abnormality.
  • refrigerant leakage information having a higher priority than information such as communication abnormality information and disconnection abnormality information is displayed on the display unit 22a of the remote controller 22.
  • the disconnection abnormality information is not displayed on the display unit 22a of the remote controller 22, and only the refrigerant leakage information is displayed.
  • the service person who performs the refrigerant leakage countermeasure only performs the refrigerant leakage countermeasure. Therefore, it is necessary to notice the disconnection abnormality after the refrigerant leakage countermeasure is completed, and to perform the disconnection abnormality countermeasure again.
  • the air conditioner 100 has a first lighting state indicating that a disconnection has occurred in a signal line that transmits a detection signal output from the refrigerant sensor to the control board; And a light emitting section that changes to a second lighting state indicating that the signal line is not disconnected.
  • the air conditioner 100 is configured so that a serviceman can check whether there is a disconnection abnormality by changing the lighting state of the light emitting unit.
  • the example of a structure is demonstrated concretely.
  • FIG. 2 is an interior view of the floor-mounted indoor unit shown in FIG.
  • the housing 20 of the floor-mounted indoor unit 2 shown in FIG. 2 is formed with a lower space 200 that constitutes an intake portion and an upper space 201 that is located above the lower space 200 and serves as a heat exchange portion.
  • the lower space 200 and the upper space 201 are partitioned by the partition portion 4.
  • the partition 4 has a flat plate shape and is installed at the center in the vertical direction of the housing 20.
  • An air passage opening 4 a serving as an air passage between the lower space 200 and the upper space 201 is formed in the partition portion 4.
  • the lower space 200 is provided on the back side of the air suction port 21 a shown in FIG. 1 and is exposed to the front side by removing the air suction port 21 a from the front panel 21.
  • the upper space 201 is provided on the back side of the air outlet 21 b shown in FIG. 1 and is exposed to the front side by removing the air outlet 21 b from the front panel 21.
  • an indoor blower fan 5 is installed that generates an air flow from the air inlet 21a shown in FIG. 1 toward the air outlet 21b.
  • the indoor blower fan 5 is a sirocco fan that is connected to the output shaft 5b of the motor 5a and includes an impeller 5c in which a plurality of blades are arranged at equal intervals in the circumferential direction.
  • the indoor fan 5 is covered with a spiral fan casing 6.
  • the fan casing 6 is installed at a position facing the air suction port 21a shown in FIG. Since the fan casing 6 is installed below the partition portion 4, the inside of the fan casing 6 is a part of the lower space 200.
  • a refrigerant sensor 7 for detecting refrigerant leakage and a rectangular parallelepiped electric component box 8 are installed in the lower space 200.
  • the electrical box 8 is installed above the indoor fan 5, and a control board 9 and a relay board 10 for controlling the floor-mounted indoor unit 2 are installed inside the electrical box 8.
  • the control board 9 has a drive control function that controls and controls the controlled devices that make up the air conditioner 100, and an abnormality that displays the details of the abnormality that has occurred in the air conditioner 100 on the display unit 22a of the remote controller 22 shown in FIG. Display function.
  • the controlled devices are various devices (not shown) such as a fan motor, a wind direction plate, a compressor, and a propeller fan mounted on the floor-mounted indoor unit 2 and the outdoor unit 1.
  • Abnormal contents by the abnormality display function include refrigerant leakage information, refrigerant leakage information, communication abnormality information indicating that an abnormality has occurred in communication between the floor-mounted indoor unit 2 and the outdoor unit 1, and disconnection in the wiring 7a.
  • the disconnection abnormality information indicating that the error occurred.
  • the refrigerant sensor 7 includes a wiring 7 a for transmitting the detection signal 71 output from the refrigerant sensor 7 to the control board 9, and the wiring 7 a is connected to the relay board 10.
  • the refrigerant sensor 7 is installed below the indoor fan 5 and detects the concentration of the refrigerant in the air around the refrigerant sensor 7.
  • the refrigerant sensor 7 outputs a detection signal 71 in which the on-duty is changed according to the detected refrigerant concentration. Details of the configuration of the refrigerant sensor 7 will be described later.
  • the upper space 201 is located downstream of the lower space 200 in the air flow generated by the indoor blower fan 5.
  • the indoor heat exchanger 11 is disposed in the upper space 201.
  • One end of an indoor pipe 11a through which the refrigerant flows is connected to the indoor heat exchanger 11, and a joint portion 12a is installed at the other end of the indoor pipe 11a.
  • the indoor pipe 11 a penetrates the partition part 4, and the joint part 12 a is located in the lower space 200.
  • a joint portion 12b is installed at one end of the pipe 3 which is an extension pipe.
  • the refrigerant may leak due to the brazing part 13 between the indoor heat exchanger 11 and the indoor pipe 11a, and the joint part 12a and the joint part 12b. It is the connection part 14.
  • the refrigerant used in the air conditioner 100 according to the present embodiment is a combustible refrigerant whose specific gravity is larger than that of air. Therefore, when the refrigerant leaks from at least one of the brazing part 13 and the connection part 14, the concentration of the refrigerant in the lower space 200 increases. By installing the refrigerant sensor 7 below the lower space 200, the concentration of the refrigerant stored on the bottom surface of the lower space 200 can be accurately measured.
  • the detection signal 71 output from the refrigerant sensor 7 is received by the control board 9 via the wiring 7 a and the relay board 10.
  • the indoor blower fan 5 is operated to diffuse the refrigerant, thereby the refrigerant concentration. Prevents from rising to flammable concentration.
  • FIG. 3 is a diagram showing a connection state of a remote controller, a control board, a relay board, and a refrigerant sensor provided in the air conditioner according to the embodiment of the present invention.
  • FIG. 4 is a diagram showing a detailed configuration of the control board, the relay board, and the refrigerant sensor shown in FIG.
  • a wire 22b is connected to the remote controller 22, and a connector 22c is provided on the wire 22b.
  • the control board 9 includes a control unit 9a, a connection terminal 9b, and a connection terminal 9c.
  • the control unit 9a has the drive control function and the abnormality display function described above.
  • the relay board 10 includes a lighting control unit 10a, a connection terminal 10b, and a connection terminal 10c.
  • the connection terminals 10b and 10c are each connected to the lighting control unit 10a.
  • the control board 9 and the relay board 10 are connected by a wiring 16. Specifically, the connector 16 a provided on one end side of the wiring 16 is connected to the connection terminal 9 b of the control board 9. The connector 16 b provided on the other end side of the wiring 16 is connected to the connection terminal 10 c of the relay substrate 10.
  • the refrigerant sensor 7 includes a refrigerant detection circuit 7d. Details of the refrigerant detection circuit 7d will be described later.
  • the refrigerant sensor 7 is connected to the relay board 10 by the wiring 7a. Specifically, the connector 7b provided on one end side of the wiring 7a is connected to the connection terminal 10b of the relay board 10. A connector 7 c provided on the other end side of the wiring 7 a is connected to the refrigerant sensor 7.
  • the control board 9 shown in FIG. 4 supplies the control unit 9a, the connection terminal 9b, the resistor 9d that is a pull-down resistor for stabilizing the potential of the signal line, the power source 9e, and the power of the power source 9e to the refrigerant sensor 7.
  • the relay board 10 shown in FIG. 4 includes a lighting control unit 10a, a connection terminal 10b, a connection terminal 10c, and a power source 10d.
  • the power source 10d has the same potential as that of the power source 9e.
  • the lighting control unit 10a includes a light emitting diode (LED) 302, a resistor 303 for adjusting a current value flowing through the LED 302, a resistor 310 that is a pull-down resistor for stabilizing the potential of the signal line, And a buffer circuit 320 for transmitting a signal to the LED 302 without affecting the potentials of the signal lines 7f, 9g, and 10e.
  • the light emitting unit provided in the lighting control unit 10 a is not limited to the LED 302, and a photoelectric element such as a laser or a lamp may be used instead of the LED 302.
  • the buffer circuit 320 includes an NPN transistor 304, a resistor 305 having one end connected to the base of the transistor 304 and the other end connected to the emitter of the transistor 304, a PNP transistor 307, and one end of the transistor 304. And a resistor 306 having the other end connected to the collector of the transistor 307.
  • the buffer circuit 320 has one end connected to the power supply 10d and the emitter of the transistor 307 and the other end connected to the base of the transistor 307, and one end connected to the base of the transistor 307 and the other end connected to the signal line 10e.
  • the lighting control unit 10a may use an operational amplifier instead of the buffer circuit 320, or may use a base ground circuit using one transistor.
  • the refrigerant sensor 7 includes a refrigerant detection circuit 7d, a connector 7c, a power supply 7e having the same potential as the power supplies 9e and 10d, and a signal for transmitting the detection signal 71 output from the refrigerant detection circuit 7d to the control unit 9a.
  • the refrigerant detection circuit 7d includes a transistor 402 for changing the potentials of the signal lines 7f, 9g, and 10e, a sensor element 403 for detecting the refrigerant, and an on / off state of the transistor 402 according to the refrigerant concentration detected by the sensor element 403. And a control unit 404 that controls timing.
  • a power supply 7e necessary for the operation of the transistor 402 and the refrigerant detection circuit 7d is supplied from a power supply 9e of the control board 9.
  • the transistor 402 is used, but a switching element such as an operational amplifier or a relay may be used instead of the transistor 402.
  • FIG. 5 is a diagram showing an example of a pulse width modulation signal output from a control unit provided in the refrigerant sensor shown in FIG.
  • FIG. 5A shows a pulse width modulation signal 404a output from the control unit 404 when the concentration of the refrigerant detected by the sensor element 403 is less than a certain value.
  • the on-duty which is the ratio of the on-time Ton to one period T of the pulse width modulation signal 404a, is 30%.
  • FIG. 5B shows a pulse width modulation signal 404a output from the control unit 404 when the concentration of the refrigerant detected by the sensor element 403 is equal to or higher than a certain value.
  • the on-duty is 70%.
  • the control unit 404 generates the pulse width modulation signal 404a that increases the on-duty as the refrigerant concentration detected by the sensor element 403 increases.
  • a thermistor whose resistance value changes by utilizing a cooling action by a refrigerant can be exemplified. Specifically, as the refrigerant concentration increases, the resistance value of the thermistor decreases and the current value input from the power source 7e to the control unit 404 increases. Based on the magnitude of the current value, the control unit 404 changes the on-duty of the pulse width modulation signal 404a as shown in FIG.
  • the power supply 7e necessary for the operation of the transistor 402 and the refrigerant detection circuit 7d is supplied from the control board 9, and the pulse width modulation signal 404a corresponding to the refrigerant concentration detected by the sensor element 403 is turned on. Duty changes. As a result, the transistor 402 is controlled, and the on-duty of the detection signal 71 changes. Accordingly, the potential applied to the signal lines 7f, 9g, and 10e connected to the collector of the transistor 402 changes.
  • the controller 9a can determine whether the concentration of the refrigerant is equal to or higher than a certain value by measuring the on-duty of the detection signal 71.
  • the resistance 9d of the control board 9 is sufficiently large, so that the transistor 307 of the relay board 10 is turned off, and the transistor 304 of the relay board 10 is pulled down by the resistor 305. Turns off. As a result, since a current flows through the LED 302 via the resistor 303, the LED 302 of the relay board 10 emits light and enters a lighting state.
  • the transistor 402 of the refrigerant sensor 7 when the transistor 402 of the refrigerant sensor 7 is turned on, a base current determined by the resistor 309 flows, and the transistor 307 of the relay substrate 10 is turned on.
  • a base current determined by the resistor 306 is supplied to the transistor 304 of the relay substrate 10, so that the transistor 304 is turned on.
  • the collector-emitter voltage of the transistor 304 is sufficiently smaller than the forward voltage of the LED 302 on the relay substrate 10, so that the LED 302 is turned off.
  • the detection signal 71 sent from the refrigerant sensor 7 is converted into a light emission signal in the LED 302 of the relay substrate 10.
  • connection state between the control board 9 and the relay board 10 is released.
  • the power of the power source 9e is not supplied to the relay board 10 and the refrigerant sensor 7, so that the LED 302 of the relay board 10 is turned off.
  • connection state between the relay substrate 10 and the refrigerant sensor 7 is released.
  • the relay substrate 10 is turned off because the transistor 402 of the refrigerant sensor 7 is turned off.
  • the signal line 7f, the wiring 7a, the signal line 10e, the wiring 16, and the signal line 9g, which are signal transmission paths of the refrigerant sensor 7, are not disconnected, whether or not the refrigerant sensor 7 detects the refrigerant. Regardless of the LED 302 blinks. On the other hand, when the signal transmission path of the refrigerant sensor 7 is disconnected, the LED 302 is turned on or off. Therefore, the service person can determine that one of the signal transmission paths of the refrigerant sensor 7 is disconnected by confirming that the LED 302 is turned on or off.
  • Control unit 9a determines that the refrigerant has not leaked when receiving detection signal 71 with a short on-duty shown in FIG. 5A, and does not display the refrigerant leak information on remote controller 22. On the other hand, the control unit 9a determines that the refrigerant has leaked when receiving the detection signal 71 having a long on-duty shown in FIG. 5 (2), and uses refrigerant leakage information having a higher priority than information such as communication abnormality and disconnection abnormality. It is displayed on the remote controller 22.
  • the air conditioner 100 After the refrigerant leakage information is displayed on the remote controller 22, only the refrigerant leakage information is displayed on the remote controller 22 even when the signal transmission path of the refrigerant sensor 7 is disconnected.
  • the LED 302 when the signal transmission path of the refrigerant sensor 7 is not disconnected, the LED 302 blinks at a constant cycle, and when the signal transmission path of the refrigerant sensor 7 is disconnected, the LED 302 is Turns on or off.
  • the serviceman can immediately confirm the disconnection abnormality that is not displayed on the remote controller 22 by confirming the lighting state of the LED 302. Therefore, according to the air conditioner 100 according to the present embodiment, measures against refrigerant leakage and breakage abnormality can be performed at the same time, and workability is improved.
  • the display of the refrigerant leakage information is maintained even when the refrigerant concentration falls below a certain value.
  • the service person who takes measures against refrigerant leakage can grasp the disconnection abnormality by checking the lighting state of the LED 302.
  • the lighting control unit 10a may be provided on the control board 9.
  • the lighting control unit 10a may be provided on the control board 9.
  • the connector 7 b of the refrigerant sensor 7 is connected to the connection terminal 9 b of the control board 9.
  • the lighting control unit 10a provided on the relay board 10 turns off the LED 302 when the wiring 16 serving as a signal transmission path between the control board 9 and the relay board 10 is disconnected, and the relay board 10 and the refrigerant sensor 7 are turned off.
  • the LED 302 is turned on when the wiring 7a serving as a signal transmission path between the two is disconnected.
  • the light emitting unit is turned on or off in the first lighting state indicating that the signal transmission path of the refrigerant sensor 7 is disconnected, and the signal transmission path of the refrigerant sensor 7 is disconnected.
  • the lighting control unit 10a that blinks the light-emitting unit in the second lighting state indicating that the signal is not present, the service person can easily grasp whether or not the signal transmission path of the refrigerant sensor 7 is disconnected.
  • the control board 9 and the relay board 10 are electrically connected by connecting the connector to the connection terminal, and the relay board 10 and the refrigerant sensor 7 are further electrically connected is described.
  • the wiring 7a, 16, 22b may be directly connected to the connection terminal without using a connector, or the wiring 7a, 16, 22b may be soldered to a wiring pattern (not shown) on the control board 9 and the relay board 10. It may be configured to connect with.
  • the example in which the LED 302 is provided on the control board 9 or the relay board 10 has been described.
  • the LED 302 may be installed at any location outside the electrical component box 8 illustrated in FIG.
  • the LED 302 When the LED 302 is provided on the control board 9 or the relay board 10, it is not shown for connecting the LED 302 to the lighting control unit 10a as compared with the case where the LED 302 is installed at any location outside the electrical component box 8. Wiring can be shortened or omitted, the configuration of the control board 9 or the relay board 10 is simplified, the yield is improved, and the reliability is improved.
  • the LED 302 When the LED 302 is provided outside the electrical box 8, the visibility of the LED 302 is improved as compared with the case where the LED 302 is installed on the control board 9 or the relay board 10, and workability for measures against disconnection abnormality is improved.
  • the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
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  • Air Conditioning Control Device (AREA)

Abstract

This air conditioner is provided with: a floor-placed type indoor unit; a control board (9) that controls the floor-placed type indoor unit; a refrigerant sensor (7) that is provided to the floor-placed type indoor unit and that outputs a detection signal (71) of which the on-duty is changed according to the detected concentration of a refrigerant; and an LED (302) that is provided to the floor-placed type indoor unit and that serves as a light-emitting unit that changes between a first ON state indicating the disconnection of a signal transmission path for transmitting the detection signal (71) to the control board (9) and a second ON state indicating the non-disconnection of the signal transmission path.

Description

空気調和機Air conditioner
　本発明は、床置形室内機と床置形室内機側で漏洩した冷媒を検出する冷媒センサとを備えた空気調和機に関する。 The present invention relates to an air conditioner including a floor-mounted indoor unit and a refrigerant sensor that detects refrigerant leaked on the floor-mounted indoor unit side.
　フロン系冷媒は、物性が安定し、取扱が容易な半面、地球温暖化係数が高く地球環境に悪影響を与えるため、温暖化係数の低い自然冷媒であるプロパンまたはプロピレンといった炭化水素系冷媒がフロン系冷媒の代替えとして注目されている。ところが炭化水素系冷媒は、可燃性を有するため、空気調和機へ適用する場合、空気調和機から漏洩した冷媒が可燃濃度に達する可能性がある。従って空気調和機においては、冷媒の漏洩を早期に検出して、漏洩した冷媒が可燃濃度にならないように何らかの対策を講ずることが望ましい。 Fluorocarbon refrigerants have stable physical properties and are easy to handle, but have a high global warming potential and adversely affect the global environment. Therefore, hydrocarbon refrigerants such as propane or propylene, which are natural refrigerants with low global warming potential, are chlorofluorocarbons. It is attracting attention as an alternative to refrigerants. However, since the hydrocarbon-based refrigerant has combustibility, when applied to an air conditioner, the refrigerant leaked from the air conditioner may reach a combustible concentration. Therefore, in an air conditioner, it is desirable to detect refrigerant leakage at an early stage and take some measures so that the leaked refrigerant does not reach a flammable concentration.
　特許文献１に開示される床置形室内機は、送風ファン、ファンモータおよび圧縮機といった機器を統括制御する制御基板と、ユーザが空気調和機の運転操作、運転状態および異常内容をモニタするリモコンとを備える。冷媒センサは信号線を含む配線を介して制御基板に接続される。特許文献１に開示される床置形室内機では機械室下部に冷媒センサが設置されている。これは炭化水素系冷媒の比重が空気の比重よりも大きく、機械室下部に冷媒センサを設置することにより、漏洩した冷媒の濃度を効果的に測定できるためである。冷媒センサでは、熱交換器およびユニオン継手といった冷凍サイクルの構成部品から漏洩した冷媒が検出され、床置形室内機は、その濃度が一定値以上に達したとき、送風ファンを運転して冷媒を拡散することにより、冷媒の濃度が可燃濃度まで上昇することを防止している。 A floor-mounted indoor unit disclosed in Patent Literature 1 includes a control board that performs overall control of devices such as a blower fan, a fan motor, and a compressor, and a remote controller that allows a user to monitor the operation, operating state, and abnormality content of the air conditioner. Is provided. The refrigerant sensor is connected to the control board via a wiring including a signal line. In the floor-mounted indoor unit disclosed in Patent Document 1, a refrigerant sensor is installed at the lower part of the machine room. This is because the specific gravity of the hydrocarbon-based refrigerant is larger than the specific gravity of air, and the concentration of the leaked refrigerant can be effectively measured by installing a refrigerant sensor in the lower part of the machine room. The refrigerant sensor detects refrigerant leaked from the components of the refrigeration cycle such as heat exchangers and union joints, and the floor-standing indoor unit operates the blower fan to diffuse the refrigerant when the concentration reaches a certain value or more. By doing so, the refrigerant concentration is prevented from rising to the flammable concentration.
　一方、特許文献１に開示される床置形室内機は、空気調和機に生じた各種異常の内容をユーザへ通知するため、リモコンに異常内容を表示する機能を有する。異常内容としては、冷媒が漏洩したことを示す冷媒漏洩情報と、室内機と室外機との間の通信に異常が生じたことを示す通信異常情報と、冷媒センサから出力される冷媒の検出信号を伝達する信号線に断線が生じたことを示す断線異常情報とを例示できる。 On the other hand, the floor-mounted indoor unit disclosed in Patent Document 1 has a function of displaying the abnormal content on the remote controller in order to notify the user of the content of various abnormalities occurring in the air conditioner. Abnormal contents include refrigerant leakage information indicating that the refrigerant has leaked, communication abnormality information indicating that an abnormality has occurred in communication between the indoor unit and the outdoor unit, and a refrigerant detection signal output from the refrigerant sensor. The disconnection abnormality information indicating that a disconnection has occurred in the signal line transmitting the signal can be exemplified.
特開２０１５－９４５６６号公報Japanese Patent Laying-Open No. 2015-94566
　特許文献１に代表される従来の床置形室内機は、通信異常および断線異常といった情報よりも優先度の高い冷媒漏洩情報をリモコンに表示させるように構成されている。これは、冷媒の濃度が可燃濃度まで上昇する前に冷媒が漏洩したことをユーザへ通知することにより、空気調和機が設置されている部屋の換気を促し、またはユーザの操作により空気調和機を動作させて強制的に冷媒を拡散させるためである。従って冷媒漏洩が検出された後に上記の信号線が断線した場合、リモコンには断線異常が表示されず冷媒漏洩情報のみ表示される。そのためサービスマンは、冷媒漏洩情報のみ表示された床置形室内機に対して冷媒漏洩対策のみ行うため、対策が完了した後に断線異常に気づき、再度断線異常対策を行う必要が生じるという問題があった。 The conventional floor-standing indoor unit represented by Patent Document 1 is configured to display on the remote controller refrigerant leakage information having a higher priority than information such as communication abnormality and disconnection abnormality. This is to notify the user that the refrigerant has leaked before the refrigerant concentration rises to the flammable concentration, thereby encouraging ventilation of the room where the air conditioner is installed, or by operating the air conditioner by user operation. This is because the refrigerant is forced to diffuse by operating. Accordingly, when the signal line is disconnected after the refrigerant leakage is detected, the disconnection abnormality is not displayed on the remote controller and only the refrigerant leakage information is displayed. For this reason, since the service person only performs countermeasures for refrigerant leakage for floor-standing indoor units that display only refrigerant leakage information, there is a problem that after the countermeasure is completed, a disconnection abnormality is noticed and it is necessary to take countermeasures for disconnection abnormality again. .
　本発明は、上記に鑑みてなされたものであって、可燃性の冷媒の漏洩対策を損なうことなく断線異常対策の作業性を向上させることができる空気調和機を得ることを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to obtain an air conditioner that can improve workability of measures against disconnection abnormality without impairing measures against leakage of a flammable refrigerant.
　上述した課題を解決し、目的を達成するために、本発明に係る空気調和機は、床置形室内機と、床置形室内機に設置され、床置形室内機を制御する制御基板と、床置形室内機に設置され、検出した冷媒の濃度に従いオンデューティを変化させた検出信号を出力する冷媒センサと、床置形室内機に設置され、検出信号を制御基板へ伝送する信号伝達経路が断線したことを示す第１の点灯状態と、信号伝達経路が断線していないことを示す第２の点灯状態とに変化する発光部とを備えたことを特徴とする。 In order to solve the above-described problems and achieve the object, an air conditioner according to the present invention includes a floor-mounted indoor unit, a control board that is installed in the floor-mounted indoor unit and controls the floor-mounted indoor unit, and a floor-mounted indoor unit. The refrigerant sensor that is installed in the indoor unit and outputs a detection signal whose on-duty is changed according to the detected refrigerant concentration, and the signal transmission path that is installed in the floor-mounted indoor unit and transmits the detection signal to the control board are disconnected. And a light emitting unit that changes to a second lighting state indicating that the signal transmission path is not disconnected.
　本発明に係る空気調和機は、可燃性の冷媒の漏洩対策を損なうことなく断線異常対策の作業性を向上させることができる、という効果を奏する。 The air conditioner according to the present invention has an effect that it is possible to improve workability of measures against disconnection abnormality without impairing measures against leakage of flammable refrigerant.
本発明の実施の形態に係る空気調和機の外観図1 is an external view of an air conditioner according to an embodiment of the present invention. 図１に示す床置形室内機の内観図Interior view of the floor-mounted indoor unit shown in FIG. 本発明の実施の形態に係る空気調和機が備えるリモコン、制御基板、中継基板および冷媒センサの接続状態を示す図The figure which shows the connection state of the remote control with which the air conditioner which concerns on embodiment of this invention is equipped, a control board, a relay board, and a refrigerant | coolant sensor 図３に示す制御基板、中継基板および冷媒センサの詳細構成を示す図The figure which shows the detailed structure of the control board shown in FIG. 3, a relay board | substrate, and a refrigerant | coolant sensor. 図４に示す冷媒センサに設けられる制御部から出力されるパルス幅変調信号の一例を示す図The figure which shows an example of the pulse width modulation signal output from the control part provided in the refrigerant | coolant sensor shown in FIG.
　以下に、本発明の実施の形態に係る空気調和機を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Hereinafter, an air conditioner according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.
実施の形態．
　図１は本発明の実施の形態に係る空気調和機の外観図である。空気調和機１００は、室外機１と、室外機１に接続された床置形室内機２と、室外機１および床置形室内機２を相互に接続して冷媒が流れる配管３とを備える。本実施の形態に係る空気調和機１００では、可燃性の炭化水素系の冷媒が用いられている。 Embodiment.
FIG. 1 is an external view of an air conditioner according to an embodiment of the present invention. The air conditioner 100 includes an outdoor unit 1, a floor-mounted indoor unit 2 connected to the outdoor unit 1, and a pipe 3 through which the outdoor unit 1 and the floor-mounted indoor unit 2 are connected to each other to flow a refrigerant. In the air conditioner 100 according to the present embodiment, a flammable hydrocarbon-based refrigerant is used.
　床置形室内機２は、筐体２０と、筐体２０の正面に設置される正面パネル２１と、リモートコントローラ２２とを備える。以下ではリモートコントローラ２２を単に「リモコン２２」と称する場合がある。筐体２０は中空の箱体であり、筐体２０の前面には前面開口部が形成されている。筐体２０の前面開口部には正面パネル２１が着脱可能に取り付けられている。正面パネル２１には、正面パネル２１の下側に形成された空気吸込口２１ａと、正面パネル２１の上側に形成された空気吹出口２１ｂとが設けられている。また正面パネル２１には、空気吸込口２１ａと空気吹出口２１ｂとの間に、リモコン２２が設置されている。 The floor-standing indoor unit 2 includes a housing 20, a front panel 21 installed in front of the housing 20, and a remote controller 22. Hereinafter, the remote controller 22 may be simply referred to as “remote controller 22”. The housing 20 is a hollow box, and a front opening is formed on the front surface of the housing 20. A front panel 21 is detachably attached to the front opening of the housing 20. The front panel 21 is provided with an air suction port 21 a formed on the lower side of the front panel 21 and an air outlet port 21 b formed on the upper side of the front panel 21. The front panel 21 is provided with a remote controller 22 between the air inlet 21a and the air outlet 21b.
　リモコン２２は、ユーザが空気調和機１００の運転操作を行うと共に、ユーザが空気調和機１００の運転状態および異常内容をモニタするためのユーザインターフェースである。運転操作としては、空気調和機１００の運転を開始する操作と、空気調和機１００の運転を停止する操作と、運転モードを切り替える操作とを例示できる。異常内容としては空気調和機１００の冷凍サイクルを構成する部品から冷媒が漏洩したことを示す冷媒漏洩情報と、床置形室内機２と室外機１との間の通信に異常が生じたことを示す通信異常情報と、後述する信号線に断線が生じたことを示す断線異常情報とを例示できる。 The remote controller 22 is a user interface for the user to operate the air conditioner 100, and for the user to monitor the operation state and details of the abnormality of the air conditioner 100. Examples of the driving operation include an operation for starting the operation of the air conditioner 100, an operation for stopping the operation of the air conditioner 100, and an operation for switching the operation mode. As abnormal contents, refrigerant leakage information indicating that the refrigerant has leaked from the components constituting the refrigeration cycle of the air conditioner 100 and communication between the floor-standing indoor unit 2 and the outdoor unit 1 indicate that an abnormality has occurred. Communication abnormality information and disconnection abnormality information indicating that a disconnection has occurred in a signal line to be described later can be exemplified.
　リモコン２２は、これらの運転状態および異常内容を表示する表示部２２ａを備える。空気調和機１００では、通信異常情報および断線異常情報といった情報よりも優先度の高い冷媒漏洩情報がリモコン２２の表示部２２ａに表示される。前述したように、冷媒の濃度が可燃濃度まで上昇する前に冷媒が漏洩したことをユーザへ通知することにより、空気調和機が設置されている部屋の換気を促し、またはユーザの操作により空気調和機を動作させて強制的に冷媒を拡散させるためである。また空気調和機１００では、冷媒漏洩情報が表示されているときに後述する信号線に断線が生じた場合、リモコン２２の表示部２２ａには断線異常情報が表示されず冷媒漏洩情報のみ表示される。このように冷媒漏洩情報が表示されている場合、冷媒漏洩対策を行うサービスマンは冷媒漏洩対策のみ行うため、冷媒漏洩対策が完了した後に断線異常に気づき、再度断線異常対策を行う必要が生じる。 The remote controller 22 includes a display unit 22a that displays these operating states and details of the abnormality. In the air conditioner 100, refrigerant leakage information having a higher priority than information such as communication abnormality information and disconnection abnormality information is displayed on the display unit 22a of the remote controller 22. As described above, by notifying the user that the refrigerant has leaked before the refrigerant concentration rises to the flammable concentration, the user is encouraged to ventilate the room where the air conditioner is installed, or the user operates the air conditioner. This is because the machine is operated to forcibly diffuse the refrigerant. Further, in the air conditioner 100, when a later-described signal line is disconnected while the refrigerant leakage information is displayed, the disconnection abnormality information is not displayed on the display unit 22a of the remote controller 22, and only the refrigerant leakage information is displayed. . Thus, when the refrigerant leakage information is displayed, the service person who performs the refrigerant leakage countermeasure only performs the refrigerant leakage countermeasure. Therefore, it is necessary to notice the disconnection abnormality after the refrigerant leakage countermeasure is completed, and to perform the disconnection abnormality countermeasure again.
　本実施の形態に係る空気調和機１００はこのような問題を解決するため、冷媒センサから出力される検出信号を制御基板へ伝送する信号線に断線が生じたことを示す第１の点灯状態と、信号線に断線が生じていないことを示す第２の点灯状態とに変化する発光部を備える。このように空気調和機１００は、当該発光部の点灯状態が変化することにより断線異常の有無をサービスマンが確認できるように構成されている。以下、その構成例を具体的に説明する。 In order to solve such a problem, the air conditioner 100 according to the present embodiment has a first lighting state indicating that a disconnection has occurred in a signal line that transmits a detection signal output from the refrigerant sensor to the control board; And a light emitting section that changes to a second lighting state indicating that the signal line is not disconnected. As described above, the air conditioner 100 is configured so that a serviceman can check whether there is a disconnection abnormality by changing the lighting state of the light emitting unit. Hereinafter, the example of a structure is demonstrated concretely.
　図２は図１に示す床置形室内機の内観図である。図２に示す床置形室内機２の筐体２０には、吸気部を構成する下部空間２００と、下部空間２００の上方に位置し、熱交換部となる上部空間２０１とが形成されている。下部空間２００と上部空間２０１との間は仕切部４によって仕切られている。仕切部４は、平板形状であり、筐体２０の上下方向の中央に設置されている。仕切部４には、下部空間２００と上部空間２０１との間の風路となる風路開口部４ａが形成されている。 FIG. 2 is an interior view of the floor-mounted indoor unit shown in FIG. The housing 20 of the floor-mounted indoor unit 2 shown in FIG. 2 is formed with a lower space 200 that constitutes an intake portion and an upper space 201 that is located above the lower space 200 and serves as a heat exchange portion. The lower space 200 and the upper space 201 are partitioned by the partition portion 4. The partition 4 has a flat plate shape and is installed at the center in the vertical direction of the housing 20. An air passage opening 4 a serving as an air passage between the lower space 200 and the upper space 201 is formed in the partition portion 4.
　下部空間２００は、図１に示す空気吸込口２１ａの背面側に設けられており、空気吸込口２１ａを正面パネル２１から取り外すことによって前面側に露出する。上部空間２０１は、図１に示す空気吹出口２１ｂの背面側に設けられており、空気吹出口２１ｂを正面パネル２１から取り外すことによって前面側に露出する。 The lower space 200 is provided on the back side of the air suction port 21 a shown in FIG. 1 and is exposed to the front side by removing the air suction port 21 a from the front panel 21. The upper space 201 is provided on the back side of the air outlet 21 b shown in FIG. 1 and is exposed to the front side by removing the air outlet 21 b from the front panel 21.
　下部空間２００には、図１に示す空気吸込口２１ａから空気吹出口２１ｂに向かう空気の流れを生じさせる室内送風ファン５が設置されている。室内送風ファン５は、モータ５ａの出力軸５ｂに接続され、複数の翼が周方向に等間隔で配置された羽根車５ｃを備えたシロッコファンである。室内送風ファン５は渦巻状のファンケーシング６で覆われている。ファンケーシング６は、図１に示す空気吸込口２１ａに対向する位置に設置されている。ファンケーシング６は仕切部４よりも下方に設置されているため、ファンケーシング６の内部は下部空間２００の一部である。 In the lower space 200, an indoor blower fan 5 is installed that generates an air flow from the air inlet 21a shown in FIG. 1 toward the air outlet 21b. The indoor blower fan 5 is a sirocco fan that is connected to the output shaft 5b of the motor 5a and includes an impeller 5c in which a plurality of blades are arranged at equal intervals in the circumferential direction. The indoor fan 5 is covered with a spiral fan casing 6. The fan casing 6 is installed at a position facing the air suction port 21a shown in FIG. Since the fan casing 6 is installed below the partition portion 4, the inside of the fan casing 6 is a part of the lower space 200.
　また下部空間２００には、冷媒の漏洩を検出する冷媒センサ７と、直方体形状の電気品箱８とが設置されている。電気品箱８は室内送風ファン５よりも上方に設置され、電気品箱８の内部には、床置形室内機２を制御する制御基板９と中継基板１０とが設置される。制御基板９は、空気調和機１００を構成する被制御機器を統括して制御する駆動制御機能と、空気調和機１００で発生した異常内容を図１に示すリモコン２２の表示部２２ａに表示する異常表示機能とを有する。被制御機器は、床置形室内機２および室外機１に搭載されるファンモータ、風向板、圧縮機およびプロペラファンといった不図示の各種機器である。異常表示機能による異常内容としては、冷媒が漏洩したこと冷媒漏洩情報と、床置形室内機２と室外機１との間の通信に異常が生じたことを示す通信異常情報と、配線７ａに断線が生じたことを示す断線異常情報とを例示できる。 In the lower space 200, a refrigerant sensor 7 for detecting refrigerant leakage and a rectangular parallelepiped electric component box 8 are installed. The electrical box 8 is installed above the indoor fan 5, and a control board 9 and a relay board 10 for controlling the floor-mounted indoor unit 2 are installed inside the electrical box 8. The control board 9 has a drive control function that controls and controls the controlled devices that make up the air conditioner 100, and an abnormality that displays the details of the abnormality that has occurred in the air conditioner 100 on the display unit 22a of the remote controller 22 shown in FIG. Display function. The controlled devices are various devices (not shown) such as a fan motor, a wind direction plate, a compressor, and a propeller fan mounted on the floor-mounted indoor unit 2 and the outdoor unit 1. Abnormal contents by the abnormality display function include refrigerant leakage information, refrigerant leakage information, communication abnormality information indicating that an abnormality has occurred in communication between the floor-mounted indoor unit 2 and the outdoor unit 1, and disconnection in the wiring 7a. For example, the disconnection abnormality information indicating that the error occurred.
　冷媒センサ７は、冷媒センサ７から出力される検出信号７１を制御基板９へ送信するための配線７ａを備え、配線７ａは中継基板１０に接続されている。冷媒センサ７は、室内送風ファン５よりも下方に設置され、冷媒センサ７の周囲の空気中における冷媒の濃度を検出する。冷媒センサ７は、検出した冷媒の濃度に従いオンデューティを変化させた検出信号７１を出力する。冷媒センサ７の構成の詳細は後述する。 The refrigerant sensor 7 includes a wiring 7 a for transmitting the detection signal 71 output from the refrigerant sensor 7 to the control board 9, and the wiring 7 a is connected to the relay board 10. The refrigerant sensor 7 is installed below the indoor fan 5 and detects the concentration of the refrigerant in the air around the refrigerant sensor 7. The refrigerant sensor 7 outputs a detection signal 71 in which the on-duty is changed according to the detected refrigerant concentration. Details of the configuration of the refrigerant sensor 7 will be described later.
　上部空間２０１は、室内送風ファン５により生じる空気の流れにおいて下部空間２００よりも下流側に位置している。上部空間２０１には、室内熱交換器１１が配置されている。室内熱交換器１１には冷媒が流れる室内配管１１ａの一端が接続され、室内配管１１ａの他端には継手部１２ａが設置されている。室内配管１１ａは仕切部４を貫通し、継手部１２ａは下部空間２００に位置する。延長配管である配管３の一端には継手部１２ｂが設置されている。継手部１２ａに継手部１２ｂが接続されることにより、配管３と室内配管１１ａとが接続される。 The upper space 201 is located downstream of the lower space 200 in the air flow generated by the indoor blower fan 5. The indoor heat exchanger 11 is disposed in the upper space 201. One end of an indoor pipe 11a through which the refrigerant flows is connected to the indoor heat exchanger 11, and a joint portion 12a is installed at the other end of the indoor pipe 11a. The indoor pipe 11 a penetrates the partition part 4, and the joint part 12 a is located in the lower space 200. A joint portion 12b is installed at one end of the pipe 3 which is an extension pipe. By connecting the joint part 12b to the joint part 12a, the pipe 3 and the indoor pipe 11a are connected.
　このように構成された床置形室内機２において冷媒の漏洩が生じる可能性があるのは、室内熱交換器１１と室内配管１１ａとのろう付け部１３と、継手部１２ａと継手部１２ｂとの接続部１４である。本実施の形態に係る空気調和機１００で用いられる冷媒は、その比重が空気の比重よりも大きい可燃性の冷媒である。そのため、ろう付け部１３および接続部１４の少なくとも一方から冷媒が漏洩した場合、下部空間２００の冷媒の濃度が上昇する。冷媒センサ７を下部空間２００の下部に設置することにより、下部空間２００の底面に貯まった冷媒の濃度を正確に測定できる。 In the floor-mounted indoor unit 2 configured as described above, the refrigerant may leak due to the brazing part 13 between the indoor heat exchanger 11 and the indoor pipe 11a, and the joint part 12a and the joint part 12b. It is the connection part 14. The refrigerant used in the air conditioner 100 according to the present embodiment is a combustible refrigerant whose specific gravity is larger than that of air. Therefore, when the refrigerant leaks from at least one of the brazing part 13 and the connection part 14, the concentration of the refrigerant in the lower space 200 increases. By installing the refrigerant sensor 7 below the lower space 200, the concentration of the refrigerant stored on the bottom surface of the lower space 200 can be accurately measured.
　冷媒センサ７から出力された検出信号７１は配線７ａおよび中継基板１０を介して制御基板９に受信される。制御基板９では、冷媒センサ７から出力された検出信号７１に基づき、漏洩した冷媒の濃度が一定値以上に達したとき、室内送風ファン５を運転して冷媒を拡散することにより、冷媒の濃度が可燃濃度まで上昇することを防止する。以下では、冷媒センサ７、制御基板９および中継基板１０の構成の詳細を説明する。 The detection signal 71 output from the refrigerant sensor 7 is received by the control board 9 via the wiring 7 a and the relay board 10. In the control board 9, based on the detection signal 71 output from the refrigerant sensor 7, when the concentration of the leaked refrigerant reaches a certain value or more, the indoor blower fan 5 is operated to diffuse the refrigerant, thereby the refrigerant concentration. Prevents from rising to flammable concentration. Below, the detail of a structure of the refrigerant | coolant sensor 7, the control board 9, and the relay board | substrate 10 is demonstrated.
　図３は本発明の実施の形態に係る空気調和機が備えるリモコン、制御基板、中継基板および冷媒センサの接続状態を示す図である。図４は図３に示す制御基板、中継基板および冷媒センサの詳細構成を示す図である。 FIG. 3 is a diagram showing a connection state of a remote controller, a control board, a relay board, and a refrigerant sensor provided in the air conditioner according to the embodiment of the present invention. FIG. 4 is a diagram showing a detailed configuration of the control board, the relay board, and the refrigerant sensor shown in FIG.
　図３に示すように、リモコン２２には配線２２ｂが接続され、配線２２ｂにはコネクタ２２ｃが設けられている。制御基板９は、制御部９ａ、接続端子９ｂおよび接続端子９ｃを備える。制御部９ａは前述した駆動制御機能と異常表示機能とを備える。接続端子９ｃがリモコン２２のコネクタ２２ｃが接続されることにより、リモコン２２が制御部９ａに接続される。 As shown in FIG. 3, a wire 22b is connected to the remote controller 22, and a connector 22c is provided on the wire 22b. The control board 9 includes a control unit 9a, a connection terminal 9b, and a connection terminal 9c. The control unit 9a has the drive control function and the abnormality display function described above. When the connection terminal 9c is connected to the connector 22c of the remote controller 22, the remote controller 22 is connected to the controller 9a.
　中継基板１０は、点灯制御部１０ａ、接続端子１０ｂおよび接続端子１０ｃを備える。接続端子１０ｂ，１０ｃはそれぞれ点灯制御部１０ａに接続される。制御基板９と中継基板１０は配線１６により接続される。具体的には、配線１６の一端側に設けられたコネクタ１６ａは、制御基板９の接続端子９ｂに接続される。配線１６の他端側に設けられたコネクタ１６ｂは、中継基板１０の接続端子１０ｃに接続される。 The relay board 10 includes a lighting control unit 10a, a connection terminal 10b, and a connection terminal 10c. The connection terminals 10b and 10c are each connected to the lighting control unit 10a. The control board 9 and the relay board 10 are connected by a wiring 16. Specifically, the connector 16 a provided on one end side of the wiring 16 is connected to the connection terminal 9 b of the control board 9. The connector 16 b provided on the other end side of the wiring 16 is connected to the connection terminal 10 c of the relay substrate 10.
　冷媒センサ７は冷媒検出回路７ｄを備える。冷媒検出回路７ｄの詳細は後述する。冷媒センサ７は配線７ａにより中継基板１０と接続される。具体的には、配線７ａの一端側に設けられたコネクタ７ｂが中継基板１０の接続端子１０ｂに接続される。配線７ａの他端側に設けられたコネクタ７ｃが冷媒センサ７に接続される。 The refrigerant sensor 7 includes a refrigerant detection circuit 7d. Details of the refrigerant detection circuit 7d will be described later. The refrigerant sensor 7 is connected to the relay board 10 by the wiring 7a. Specifically, the connector 7b provided on one end side of the wiring 7a is connected to the connection terminal 10b of the relay board 10. A connector 7 c provided on the other end side of the wiring 7 a is connected to the refrigerant sensor 7.
　図４に示す制御基板９は、制御部９ａと、接続端子９ｂと、信号線の電位を安定させるためのプルダウン抵抗である抵抗９ｄと、電源９ｅと、電源９ｅの電力を冷媒センサ７へ供給するための電源線９ｆと、冷媒センサ７から出力された検出信号７１を制御部９ａへ伝えるための信号線９ｇとを備える。 The control board 9 shown in FIG. 4 supplies the control unit 9a, the connection terminal 9b, the resistor 9d that is a pull-down resistor for stabilizing the potential of the signal line, the power source 9e, and the power of the power source 9e to the refrigerant sensor 7. Power supply line 9f for performing the operation, and a signal line 9g for transmitting the detection signal 71 output from the refrigerant sensor 7 to the control unit 9a.
　図４に示す中継基板１０は、点灯制御部１０ａ、接続端子１０ｂ、接続端子１０ｃおよび電源１０ｄを備える。電源１０ｄは、電源９ｅの電位と同電位である。点灯制御部１０ａは、発光部であるＬＥＤ（Ｌｉｇｈｔ　Ｅｍｉｔｔｉｎｇ　Ｄｉｏｄｅ）３０２と、ＬＥＤ３０２に流れる電流値を調整するための抵抗３０３と、信号線の電位を安定させるためのプルダウン抵抗である抵抗３１０と、信号線７ｆ，９ｇ，１０ｅの電位に影響を与えずにＬＥＤ３０２に信号を伝えるためのバッファ回路３２０とを備える。点灯制御部１０ａに設けられる発光部はＬＥＤ３０２に限定されず、ＬＥＤ３０２の代わりにレーザまたはランプといった光電素子を用いてもよい。 The relay board 10 shown in FIG. 4 includes a lighting control unit 10a, a connection terminal 10b, a connection terminal 10c, and a power source 10d. The power source 10d has the same potential as that of the power source 9e. The lighting control unit 10a includes a light emitting diode (LED) 302, a resistor 303 for adjusting a current value flowing through the LED 302, a resistor 310 that is a pull-down resistor for stabilizing the potential of the signal line, And a buffer circuit 320 for transmitting a signal to the LED 302 without affecting the potentials of the signal lines 7f, 9g, and 10e. The light emitting unit provided in the lighting control unit 10 a is not limited to the LED 302, and a photoelectric element such as a laser or a lamp may be used instead of the LED 302.
　バッファ回路３２０は、ＮＰＮ型のトランジスタ３０４と、一端がトランジスタ３０４のベースに接続され他端がトランジスタ３０４のエミッタとの間に接続された抵抗３０５と、ＰＮＰ型のトランジスタ３０７と、一端がトランジスタ３０４のベースに接続され他端がトランジスタ３０７のコレクタに接続される抵抗３０６とを備える。またバッファ回路３２０は、一端が電源１０ｄとトランジスタ３０７のエミッタとに接続され他端がトランジスタ３０７のベースに接続される抵抗３０８と、一端がトランジスタ３０７のベースに接続され他端が信号線１０ｅに接続された抵抗３０９とを備える。なお点灯制御部１０ａには、バッファ回路３２０の代わりにオペアンプを用いてもよいし、１つのトランジスタを用いたベース接地回路を用いてもよい。 The buffer circuit 320 includes an NPN transistor 304, a resistor 305 having one end connected to the base of the transistor 304 and the other end connected to the emitter of the transistor 304, a PNP transistor 307, and one end of the transistor 304. And a resistor 306 having the other end connected to the collector of the transistor 307. The buffer circuit 320 has one end connected to the power supply 10d and the emitter of the transistor 307 and the other end connected to the base of the transistor 307, and one end connected to the base of the transistor 307 and the other end connected to the signal line 10e. And a connected resistor 309. The lighting control unit 10a may use an operational amplifier instead of the buffer circuit 320, or may use a base ground circuit using one transistor.
　冷媒センサ７は、冷媒検出回路７ｄと、コネクタ７ｃと、電源９ｅおよび電源１０ｄの電位と同電位の電源７ｅと、冷媒検出回路７ｄから出力された検出信号７１を制御部９ａへ伝えるための信号線７ｆとを備える。冷媒検出回路７ｄは、信号線７ｆ，９ｇ，１０ｅの電位を変化させるためのトランジスタ４０２と、冷媒を検出するためのセンサ素子４０３と、センサ素子４０３で検出された冷媒の濃度に従いトランジスタ４０２のオンオフタイミングを制御する制御部４０４とを備える。トランジスタ４０２および冷媒検出回路７ｄの動作に必要な電源７ｅは、制御基板９の電源９ｅより供給されている。なお冷媒検出回路７ｄではトランジスタ４０２が用いられているが、トランジスタ４０２の代わりにオペアンプまたはリレーといったスイッチ素子を用いてもよい。 The refrigerant sensor 7 includes a refrigerant detection circuit 7d, a connector 7c, a power supply 7e having the same potential as the power supplies 9e and 10d, and a signal for transmitting the detection signal 71 output from the refrigerant detection circuit 7d to the control unit 9a. A line 7f. The refrigerant detection circuit 7d includes a transistor 402 for changing the potentials of the signal lines 7f, 9g, and 10e, a sensor element 403 for detecting the refrigerant, and an on / off state of the transistor 402 according to the refrigerant concentration detected by the sensor element 403. And a control unit 404 that controls timing. A power supply 7e necessary for the operation of the transistor 402 and the refrigerant detection circuit 7d is supplied from a power supply 9e of the control board 9. In the refrigerant detection circuit 7d, the transistor 402 is used, but a switching element such as an operational amplifier or a relay may be used instead of the transistor 402.
　図５は図４に示す冷媒センサに設けられる制御部から出力されるパルス幅変調信号の一例を示す図である。図５（１）には、センサ素子４０３で検出される冷媒の濃度が一定値未満であるときに制御部４０４から出力されるパルス幅変調信号４０４ａが示される。図５（１）ではパルス幅変調信号４０４ａの１周期Ｔに対するオン時間Ｔｏｎの比率であるオンデューティが３０％である。図５（２）には、センサ素子４０３で検出される冷媒の濃度が一定値以上であるときに制御部４０４から出力されるパルス幅変調信号４０４ａが示される。図５（２）ではオンデューティが７０％である。このように制御部４０４は、センサ素子４０３で検出される冷媒の濃度が高まるほどオンデューティを高めるようなパルス幅変調信号４０４ａを生成する。 FIG. 5 is a diagram showing an example of a pulse width modulation signal output from a control unit provided in the refrigerant sensor shown in FIG. FIG. 5A shows a pulse width modulation signal 404a output from the control unit 404 when the concentration of the refrigerant detected by the sensor element 403 is less than a certain value. In FIG. 5A, the on-duty, which is the ratio of the on-time Ton to one period T of the pulse width modulation signal 404a, is 30%. FIG. 5B shows a pulse width modulation signal 404a output from the control unit 404 when the concentration of the refrigerant detected by the sensor element 403 is equal to or higher than a certain value. In FIG. 5 (2), the on-duty is 70%. As described above, the control unit 404 generates the pulse width modulation signal 404a that increases the on-duty as the refrigerant concentration detected by the sensor element 403 increases.
　なおセンサ素子４０３として、冷媒による冷却作用を利用して抵抗値が変化するサーミスタを例示できる。具体的には冷媒の濃度が高くなるほど、サーミスタの抵抗値が低下して電源７ｅから制御部４０４に入力される電流値が増加する。制御部４０４はこの電流の値の大きさに基づき、図５に示されるようにパルス幅変調信号４０４ａのオンデューティを変化させる。 As the sensor element 403, a thermistor whose resistance value changes by utilizing a cooling action by a refrigerant can be exemplified. Specifically, as the refrigerant concentration increases, the resistance value of the thermistor decreases and the current value input from the power source 7e to the control unit 404 increases. Based on the magnitude of the current value, the control unit 404 changes the on-duty of the pulse width modulation signal 404a as shown in FIG.
　このように冷媒センサ７では、トランジスタ４０２および冷媒検出回路７ｄの動作に必要な電源７ｅが制御基板９より供給され、センサ素子４０３で検出される冷媒の濃度に応じたパルス幅変調信号４０４ａのオンデューティが変化する。これによりトランジスタ４０２が制御され、検出信号７１のオンデューティが変化する。従ってトランジスタ４０２のコレクタに接続される信号線７ｆ，９ｇ，１０ｅに印加される電位が変化する。 Thus, in the refrigerant sensor 7, the power supply 7e necessary for the operation of the transistor 402 and the refrigerant detection circuit 7d is supplied from the control board 9, and the pulse width modulation signal 404a corresponding to the refrigerant concentration detected by the sensor element 403 is turned on. Duty changes. As a result, the transistor 402 is controlled, and the on-duty of the detection signal 71 changes. Accordingly, the potential applied to the signal lines 7f, 9g, and 10e connected to the collector of the transistor 402 changes.
　トランジスタ４０２がオンしているとき、抵抗３０８、抵抗３０９、抵抗９ｄおよびトランジスタ４０２のオン抵抗によって、電源９ｅから出力される電圧が分圧される。制御基板９の制御部９ａにはこの分圧された電圧が印加される。トランジスタ４０２がオフしているとき、抵抗３０８、抵抗３０９、抵抗３１０および抵抗９ｄによって、電源９ｅから出力される電圧が分圧される。制御基板９の制御部９ａにはこの分圧された電圧が印加される。ここでトランジスタ４０２がオンしたときとオフしたときに制御部９ａに印加される電圧が明確に区別できるほど、抵抗９ｄの値は大きくする必要がある。制御部９ａは検出信号７１のオンデューティを計測することで、冷媒の濃度が一定値以上であるか一定値未満であるかを判別できる。 When the transistor 402 is on, the voltage output from the power source 9e is divided by the resistor 308, the resistor 309, the resistor 9d, and the on-resistance of the transistor 402. The divided voltage is applied to the control unit 9a of the control board 9. When the transistor 402 is off, the voltage output from the power source 9e is divided by the resistor 308, the resistor 309, the resistor 310, and the resistor 9d. The divided voltage is applied to the control unit 9a of the control board 9. Here, it is necessary to increase the value of the resistor 9d so that the voltage applied to the control unit 9a can be clearly distinguished when the transistor 402 is turned on and off. The controller 9a can determine whether the concentration of the refrigerant is equal to or higher than a certain value by measuring the on-duty of the detection signal 71.
　冷媒センサ７のトランジスタ４０２がオフしているとき、制御基板９の抵抗９ｄが十分大きいため、中継基板１０のトランジスタ３０７がオフ状態となり、中継基板１０のトランジスタ３０４は、抵抗３０５によりプルダウンされるためオフ状態となる。その結果、抵抗３０３を介してＬＥＤ３０２に電流が流れるため、中継基板１０のＬＥＤ３０２は発光して点灯状態になる。 When the transistor 402 of the refrigerant sensor 7 is off, the resistance 9d of the control board 9 is sufficiently large, so that the transistor 307 of the relay board 10 is turned off, and the transistor 304 of the relay board 10 is pulled down by the resistor 305. Turns off. As a result, since a current flows through the LED 302 via the resistor 303, the LED 302 of the relay board 10 emits light and enters a lighting state.
　一方、冷媒センサ７のトランジスタ４０２がオンしているときは、抵抗３０９よって決められたベース電流が流れ、中継基板１０のトランジスタ３０７はオン状態となる。トランジスタ３０７がオンすることで、中継基板１０のトランジスタ３０４には、抵抗３０６によって決められたベース電流が供給されるため、トランジスタ３０４はオン状態となる。その結果、中継基板１０のＬＥＤ３０２の順電圧よりも、トランジスタ３０４のコレクタ－エミッタ間電圧が十分小さくなるため、ＬＥＤ３０２は消灯状態となる。 On the other hand, when the transistor 402 of the refrigerant sensor 7 is turned on, a base current determined by the resistor 309 flows, and the transistor 307 of the relay substrate 10 is turned on. When the transistor 307 is turned on, a base current determined by the resistor 306 is supplied to the transistor 304 of the relay substrate 10, so that the transistor 304 is turned on. As a result, the collector-emitter voltage of the transistor 304 is sufficiently smaller than the forward voltage of the LED 302 on the relay substrate 10, so that the LED 302 is turned off.
　以上のプロセスにより、冷媒センサ７から送られた検出信号７１は中継基板１０のＬＥＤ３０２において発光信号へと変換される。 Through the above process, the detection signal 71 sent from the refrigerant sensor 7 is converted into a light emission signal in the LED 302 of the relay substrate 10.
　ここで、制御基板９と中継基板１０との接続状態が解除された場合を説明する。コネクタ１６ａが接続端子９ｂから外れ、またはコネクタ１６ｂが接続端子１０ｃから外れた場合、電源９ｅの電力が中継基板１０および冷媒センサ７へ供給されないため、中継基板１０のＬＥＤ３０２は消灯状態となる。 Here, a case where the connection state between the control board 9 and the relay board 10 is released will be described. When the connector 16a is disconnected from the connection terminal 9b or the connector 16b is disconnected from the connection terminal 10c, the power of the power source 9e is not supplied to the relay board 10 and the refrigerant sensor 7, so that the LED 302 of the relay board 10 is turned off.
　次に、中継基板１０と冷媒センサ７との接続状態が解除された場合を説明する。コネクタ７ｂが接続端子１０ｂから外れ、またはコネクタ７ｃが冷媒センサ７から外れた場合、中継基板１０は、冷媒センサ７のトランジスタ４０２がオフ状態になるため、中継基板１０のＬＥＤ３０２は点灯状態となる。 Next, a case where the connection state between the relay substrate 10 and the refrigerant sensor 7 is released will be described. When the connector 7b is disconnected from the connection terminal 10b or the connector 7c is disconnected from the refrigerant sensor 7, the relay substrate 10 is turned off because the transistor 402 of the refrigerant sensor 7 is turned off.
　このように冷媒センサ７の信号伝達経路である信号線７ｆ、配線７ａ、信号線１０ｅ、配線１６および信号線９ｇが断線していない場合には、冷媒センサ７が冷媒を検出しているか否かに関わりなくＬＥＤ３０２が点滅する。一方、冷媒センサ７の信号伝達経路が断線している場合には、ＬＥＤ３０２が点灯または消灯する。そのためサービスマンはＬＥＤ３０２が点灯または消灯していることを確認することにより、冷媒センサ７の信号伝達経路の何れかが断線していることを判別できる。 In this way, when the signal line 7f, the wiring 7a, the signal line 10e, the wiring 16, and the signal line 9g, which are signal transmission paths of the refrigerant sensor 7, are not disconnected, whether or not the refrigerant sensor 7 detects the refrigerant. Regardless of the LED 302 blinks. On the other hand, when the signal transmission path of the refrigerant sensor 7 is disconnected, the LED 302 is turned on or off. Therefore, the service person can determine that one of the signal transmission paths of the refrigerant sensor 7 is disconnected by confirming that the LED 302 is turned on or off.
　制御部９ａは、図５（１）に示すオンデューティが短い検出信号７１を受信したときには冷媒が漏洩していないと判断し、リモコン２２に対して冷媒漏洩情報を表示させない。一方、制御部９ａは、図５（２）に示すオンデューティが長い検出信号７１を受信したときには冷媒が漏洩したと判断し、通信異常および断線異常といった情報よりも優先度の高い冷媒漏洩情報をリモコン２２に表示させる。 Control unit 9a determines that the refrigerant has not leaked when receiving detection signal 71 with a short on-duty shown in FIG. 5A, and does not display the refrigerant leak information on remote controller 22. On the other hand, the control unit 9a determines that the refrigerant has leaked when receiving the detection signal 71 having a long on-duty shown in FIG. 5 (2), and uses refrigerant leakage information having a higher priority than information such as communication abnormality and disconnection abnormality. It is displayed on the remote controller 22.
　冷媒漏洩情報がリモコン２２に表示された後、冷媒センサ７の信号伝達経路が断線した場合でも、リモコン２２には冷媒漏洩情報のみ表示される。本実施の形態に係る空気調和機１００によれば、冷媒センサ７の信号伝達経路が断線していないときには、ＬＥＤ３０２が一定周期で点滅し、冷媒センサ７の信号伝達経路が断線したときには、ＬＥＤ３０２が点灯または消灯する。このようにＬＥＤ３０２は断線の有無により点灯状態が３種類に変化するため、サービスマンはＬＥＤ３０２の点灯状態を確認することにより、リモコン２２に表示されない断線異常を即座に確認できる。従って本実施の形態に係る空気調和機１００によれば、冷媒漏洩対策と断線異常対策とを同時に行うことができ、作業性が向上する。 After the refrigerant leakage information is displayed on the remote controller 22, only the refrigerant leakage information is displayed on the remote controller 22 even when the signal transmission path of the refrigerant sensor 7 is disconnected. According to the air conditioner 100 according to the present embodiment, when the signal transmission path of the refrigerant sensor 7 is not disconnected, the LED 302 blinks at a constant cycle, and when the signal transmission path of the refrigerant sensor 7 is disconnected, the LED 302 is Turns on or off. Thus, since the lighting state of the LED 302 changes to three types depending on the presence or absence of the disconnection, the serviceman can immediately confirm the disconnection abnormality that is not displayed on the remote controller 22 by confirming the lighting state of the LED 302. Therefore, according to the air conditioner 100 according to the present embodiment, measures against refrigerant leakage and breakage abnormality can be performed at the same time, and workability is improved.
　リモコン２２に冷媒漏洩情報が表示された後、冷媒の濃度が一定値未満に低下した場合でも冷媒漏洩情報の表示は維持される。本実施の形態に係る空気調和機１００によれば、冷媒漏洩情報の表示が維持された状態でも、冷媒漏洩対策を行うサービスマンはＬＥＤ３０２の点灯状態を確認することにより断線異常を把握できる。 After the refrigerant leakage information is displayed on the remote controller 22, the display of the refrigerant leakage information is maintained even when the refrigerant concentration falls below a certain value. According to the air conditioner 100 according to the present embodiment, even when the display of the refrigerant leakage information is maintained, the service person who takes measures against refrigerant leakage can grasp the disconnection abnormality by checking the lighting state of the LED 302.
　なお本実施の形態では点灯制御部１０ａが設けられている中継基板１０を用いた例を説明したが、点灯制御部１０ａは制御基板９に設けてもよい。点灯制御部１０ａが制御基板９に設けられることにより、電気品箱８内の機器設置スペースが制約されて中継基板１０を設置できない場合でも、サービスマンは断線異常を把握できる。点灯制御部１０ａが制御基板９に設けられる場合、制御基板９の接続端子９ｂに冷媒センサ７のコネクタ７ｂが接続される。 In this embodiment, the example using the relay board 10 provided with the lighting control unit 10a has been described. However, the lighting control unit 10a may be provided on the control board 9. By providing the lighting control unit 10a on the control board 9, even when the equipment installation space in the electrical component box 8 is restricted and the relay board 10 cannot be installed, the service person can grasp the disconnection abnormality. When the lighting control unit 10 a is provided on the control board 9, the connector 7 b of the refrigerant sensor 7 is connected to the connection terminal 9 b of the control board 9.
　一方、点灯制御部１０ａが設けられている中継基板１０を用いた場合には、制御基板９に配線１６が接続され、さらに中継基板１０に冷媒センサ７の配線７ａが接続される。これにより既存の制御基板９に改良を加えることなく断線異常を把握できる。 On the other hand, when the relay board 10 provided with the lighting control unit 10a is used, the wiring 16 is connected to the control board 9, and the wiring 7a of the refrigerant sensor 7 is further connected to the relay board 10. Thereby, disconnection abnormality can be grasped | ascertained, without adding the improvement to the existing control board 9. FIG.
　また中継基板１０に設けられた点灯制御部１０ａは、制御基板９と中継基板１０との間の信号伝達経路である配線１６が断線した場合にはＬＥＤ３０２を消灯させ、中継基板１０と冷媒センサ７との間の信号伝達経路である配線７ａが断線した場合にはＬＥＤ３０２を点灯させるように構成されている。これによりサービスマンは断線した箇所を大まかに把握することができ、断線異常対策に伴う作業時間を短縮できる。 The lighting control unit 10a provided on the relay board 10 turns off the LED 302 when the wiring 16 serving as a signal transmission path between the control board 9 and the relay board 10 is disconnected, and the relay board 10 and the refrigerant sensor 7 are turned off. The LED 302 is turned on when the wiring 7a serving as a signal transmission path between the two is disconnected. As a result, the service person can roughly grasp the location where the disconnection occurs, and the work time associated with measures against disconnection abnormality can be shortened.
　また本実施の形態に係る空気調和機１００は、冷媒センサ７の信号伝達経路が断線したことを示す第１の点灯状態では発光部を点灯または消灯させ、冷媒センサ７の信号伝達経路が断線していないことを示す第２の点灯状態では発光部を点滅させる点灯制御部１０ａを備えることにより、サービスマンは冷媒センサ７の信号伝達経路が断線しているか否かを容易に把握できる。 In the air conditioner 100 according to the present embodiment, the light emitting unit is turned on or off in the first lighting state indicating that the signal transmission path of the refrigerant sensor 7 is disconnected, and the signal transmission path of the refrigerant sensor 7 is disconnected. By providing the lighting control unit 10a that blinks the light-emitting unit in the second lighting state indicating that the signal is not present, the service person can easily grasp whether or not the signal transmission path of the refrigerant sensor 7 is disconnected.
　なお本実施の形態では、コネクタが接続端子に接続されることにより制御基板９および中継基板１０が電気的に接続され、さらに中継基板１０および冷媒センサ７が電気的に接続される構成例を説明したが、コネクタを用いずに配線７ａ，１６，２２ｂを直接接続端子に接続する構成でもよいし、配線７ａ，１６，２２ｂを制御基板９および中継基板１０上の不図示の配線パターンに半田付けで接続する構成でもよい。また本実施の形態ではＬＥＤ３０２が制御基板９または中継基板１０に設けられた例を説明したが、ＬＥＤ３０２は図１に示す電気品箱８の外部の何れかの場所に設置してもよい。ＬＥＤ３０２が制御基板９または中継基板１０に設けられている場合、電気品箱８の外部の何れかの場所に設置されているときに比べてＬＥＤ３０２を点灯制御部１０ａに接続するための不図示の配線を短縮すること、または省くことができ、制御基板９または中継基板１０の構成が簡素化され、歩留まりか向上すると共に信頼性が向上する。ＬＥＤ３０２が電気品箱８の外部に設けられている場合、制御基板９または中継基板１０に設置されているときに比べてＬＥＤ３０２の視認性が向上し、断線異常対策の作業性が向上する。 In the present embodiment, a configuration example in which the control board 9 and the relay board 10 are electrically connected by connecting the connector to the connection terminal, and the relay board 10 and the refrigerant sensor 7 are further electrically connected is described. However, the wiring 7a, 16, 22b may be directly connected to the connection terminal without using a connector, or the wiring 7a, 16, 22b may be soldered to a wiring pattern (not shown) on the control board 9 and the relay board 10. It may be configured to connect with. Further, in this embodiment, the example in which the LED 302 is provided on the control board 9 or the relay board 10 has been described. However, the LED 302 may be installed at any location outside the electrical component box 8 illustrated in FIG. When the LED 302 is provided on the control board 9 or the relay board 10, it is not shown for connecting the LED 302 to the lighting control unit 10a as compared with the case where the LED 302 is installed at any location outside the electrical component box 8. Wiring can be shortened or omitted, the configuration of the control board 9 or the relay board 10 is simplified, the yield is improved, and the reliability is improved. When the LED 302 is provided outside the electrical box 8, the visibility of the LED 302 is improved as compared with the case where the LED 302 is installed on the control board 9 or the relay board 10, and workability for measures against disconnection abnormality is improved.
　以上の実施の形態に示した構成は、本発明の内容の一例を示すものであり、別の公知の技術と組み合わせることも可能であるし、本発明の要旨を逸脱しない範囲で、構成の一部を省略、変更することも可能である。 The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
　１　室外機、２　床置形室内機、３　配管、４　仕切部、４ａ　風路開口部、５　室内送風ファン、５ａ　モータ、５ｂ　出力軸、５ｃ　羽根車、６　ファンケーシング、７　冷媒センサ、７ａ，１６，２２ｂ　配線、７ｂ,７ｃ,１６ａ，１６ｂ，２２ｃ　コネクタ、７ｄ　冷媒検出回路、８　電気品箱、９　制御基板、９ａ　制御部、９ｂ，９ｃ，１０ｂ，１０ｃ　接続端子、９ｆ　電源線、１０　中継基板、１０ａ　点灯制御部、１１　室内熱交換器、１１ａ　室内配管、１２ａ，１２ｂ　継手部、１３　ろう付け部、１４　接続部、７ｆ，９ｇ，１０ｅ　信号線、２０　筐体、２１　正面パネル、２１ａ　空気吸込口、２１ｂ　空気吹出口、２２　リモートコントローラ、２２ａ　表示部、７１　検出信号、１００　空気調和機、２００　下部空間、２０１　上部空間、９ｄ，３０３，３０５，３０６，３０８，３０９，３１０　抵抗、７ｅ，９ｅ，１０ｄ　電源、３０２　ＬＥＤ、３０４，３０７，４０２　トランジスタ、３２０　バッファ回路、４０３　センサ素子、４０４　制御部、４０４ａ　パルス幅変調信号。 1 outdoor unit, 2 floor-standing indoor unit, 3 piping, 4 partition, 4a air passage opening, 5 indoor fan, 5a motor, 5b output shaft, 5c impeller, 6 fan casing, 7 refrigerant sensor, 7a, 16 , 22b wiring, 7b, 7c, 16a, 16b, 22c connector, 7d refrigerant detection circuit, 8 electrical component box, 9 control board, 9a control unit, 9b, 9c, 10b, 10c connection terminal, 9f power line, 10 relay board 10a lighting control part, 11 indoor heat exchanger, 11a indoor piping, 12a, 12b joint part, 13 brazing part, 14 connection part, 7f, 9g, 10e signal line, 20 housing, 21 front panel, 21a air suction Mouth, 21b air outlet, 22 remote controller, 22a display, 71 detection signal, 100 air conditioner, 2 0 lower space, 201 upper space, 9d, 303, 305, 306, 308, 309, 310 resistance, 7e, 9e, 10d power supply, 302 LED, 304, 307, 402 transistor, 320 buffer circuit, 403 sensor element, 404 control Part, 404a pulse width modulation signal.

Claims (4)

  1. 　床置形室内機と、
    　前記床置形室内機に設置され、前記床置形室内機を制御する制御基板と、
    　前記床置形室内機に設置され、検出した冷媒の濃度に従いオンデューティを変化させた検出信号を出力する冷媒センサと、
    　前記床置形室内機に設置され、前記検出信号を前記制御基板へ伝送する信号伝達経路が断線したことを示す第１の点灯状態と、前記信号伝達経路が断線していないことを示す第２の点灯状態とに変化する発光部と
    　を備えたことを特徴とする空気調和機。     Floor-standing indoor unit,
    A control board installed in the floor-standing indoor unit and controlling the floor-standing indoor unit;
    A refrigerant sensor that is installed in the floor-standing indoor unit and outputs a detection signal in which the on-duty is changed according to the detected refrigerant concentration;
    A first lighting state indicating that the signal transmission path that is installed in the floor-standing indoor unit and transmits the detection signal to the control board is disconnected, and a second state that indicates that the signal transmission path is not disconnected. An air conditioner comprising: a light emitting unit that changes to a lighting state.
  2. 　前記第１の点灯状態では前記発光部を点灯または消灯させ、前記第２の点灯状態では前記発光部を点滅させる点灯制御部を備えたことを特徴とする請求項１に記載の空気調和機。 The air conditioner according to claim 1, further comprising a lighting control unit that turns on or off the light emitting unit in the first lighting state and blinks the light emitting unit in the second lighting state.
  3. 　前記制御基板と前記冷媒センサとの間に配置され、前記点灯制御部が設置される中継基板を備え、
    　前記点灯制御部は、前記制御基板と前記中継基板との間の前記信号伝達経路が断線した場合には前記発光部を消灯させ、前記中継基板と前記冷媒センサとの間の前記信号伝達経路が断線した場合には前記発光部を点灯させることを特徴とする請求項２に記載の空気調和機。     A relay board disposed between the control board and the refrigerant sensor, on which the lighting control unit is installed;
    The lighting control unit turns off the light emitting unit when the signal transmission path between the control board and the relay board is disconnected, and the signal transmission path between the relay board and the refrigerant sensor The air conditioner according to claim 2, wherein the light emitting unit is turned on when the wire is disconnected.
  4. 　前記発光部は前記制御基板または前記中継基板に設置されていることを特徴とする請求項３に記載の空気調和機。 The air conditioner according to claim 3, wherein the light emitting unit is installed on the control board or the relay board.
PCT/JP2016/064362 2016-05-13 2016-05-13 Air conditioner WO2017195365A1 (en)

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PCT/JP2016/064362 WO2017195365A1 (en) 2016-05-13 2016-05-13 Air conditioner
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CN201680085455.5A CN109073263A (en) 2016-05-13 2016-05-13 Air conditioner
EP16901713.4A EP3457043B1 (en) 2016-05-13 2016-05-13 Air conditioner

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JP6587743B2 (en) 2019-10-09
EP3457043B1 (en) 2021-09-08

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