WO2017090182A1 - Système de climatisation et unité intérieure utilisée dans celui-ci - Google Patents

Système de climatisation et unité intérieure utilisée dans celui-ci Download PDF

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Publication number
WO2017090182A1
WO2017090182A1 PCT/JP2015/083403 JP2015083403W WO2017090182A1 WO 2017090182 A1 WO2017090182 A1 WO 2017090182A1 JP 2015083403 W JP2015083403 W JP 2015083403W WO 2017090182 A1 WO2017090182 A1 WO 2017090182A1
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Prior art keywords
power
power supply
supply circuit
remote controller
conditioning system
Prior art date
Application number
PCT/JP2015/083403
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English (en)
Japanese (ja)
Inventor
真介 光森
Original Assignee
東芝キヤリア株式会社
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.)
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Publication date
Application filed by 東芝キヤリア株式会社 filed Critical 東芝キヤリア株式会社
Priority to EP15909299.8A priority Critical patent/EP3382294B1/fr
Priority to PCT/JP2015/083403 priority patent/WO2017090182A1/fr
Publication of WO2017090182A1 publication Critical patent/WO2017090182A1/fr

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    • 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
    • F24F11/50—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
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • F25B31/004—Lubrication oil recirculating arrangements
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units

Definitions

  • Embodiments of the present invention relate to an air conditioning system and an indoor unit used therefor.
  • an air conditioning system mounted on a large building such as a building is configured by connecting a plurality of indoor units to one outdoor unit.
  • refrigerant piping is installed so that the refrigerant circulates between the outdoor unit and the plurality of indoor units.
  • the refrigerant generated in the outdoor unit is supplied to each indoor unit via the refrigerant pipe and heat exchange is performed, and the heat exchanged refrigerant is transferred to the outdoor unit via the refrigerant pipe. It is used for generation of the refrigerant after it is returned.
  • a small amount of lubricating oil that is contained in the compressor of the outdoor unit and lubricates the sliding parts also circulates in the refrigerant pipe in the same manner as the refrigerant. Since some of the circulating lubricating oil adheres to and stays on the indoor heat exchanger and the inner surface of the pipe, the amount of lubricating oil in the compressor decreases as the operating time elapses. If the amount of lubricating oil in the compressor is insufficient, problems such as seizure of the sliding surface may occur.
  • the outdoor unit sets the refrigeration cycle to the cooling mode, and the electric expansion valve installed in the pipes of all indoor units including the stopped indoor unit is opened to the specified opening To be executed.
  • the outdoor unit and the indoor unit of the air conditioning system are independently supplied with power. For this reason, when there is an indoor unit that stops operation for a long period of time, the user may turn off the breaker to disconnect the indoor unit from the power source (cut off the power supply). In the indoor unit whose operation has been stopped, the electric expansion valve is closed so that the refrigerant does not flow into the indoor heat exchanger. If the power supply is not shut off, the electric expansion valve can be opened by the indoor controller even in the stopped indoor unit during the oil recovery operation, but in the indoor unit that is disconnected from the power source and turned off, Since there is no electric power to drive the indoor controller and the electric expansion valve, the electric expansion valve cannot be operated in the open state. Therefore, even if the oil recovery operation is performed, the lubricating oil cannot be recovered from the indoor unit whose power is shut off.
  • each indoor unit is provided with an auxiliary power supply unit that supplies low-voltage power of about 12V DC and 5V DC that enables the indoor controller and the electric expansion valve to operate when the indoor unit is turned off.
  • auxiliary power supply unit that supplies low-voltage power of about 12V DC and 5V DC that enables the indoor controller and the electric expansion valve to operate when the indoor unit is turned off.
  • the oil recovery operation can be reliably performed by opening the electric expansion valve even when the power of the indoor unit is off.
  • the 12 V DC power output terminal and the 5 V DC power output terminal of the auxiliary power supply are respectively connected to the existing 12 V DC power supply wiring and 5 V DC for the indoor unit. Connected to power wiring.
  • the 12V wiring is connected to an electric expansion valve, a drain pump, a remote controller for the indoor unit, and the like, and each device is driven by electric power supplied via the wiring.
  • an indoor controller is connected to the wiring for 5 V, and communication with the outdoor controller is performed with power supplied through the wiring, and each device in the indoor unit is controlled.
  • each device can be controlled to a state in which oil recovery operation is possible.
  • the indoor unit when the indoor unit is turned off in this air conditioning system, power is supplied not only to the electric expansion valve that needs to be driven but also to the remote controller connected to the indoor unit.
  • the display screen In the remote controller, the display screen is always in a display state while power is supplied, and time information, room temperature information, and the like are displayed.
  • the display screen of the remote controller's liquid crystal and the like is in the display state even though the power is turned off, and it may be confusing without knowing whether the power has been operated normally. is there. Further, other users who have not performed the power-off operation mistakenly recognize that the indoor unit can be operated because the display screen of the remote controller is displayed.
  • the present invention is an air conditioning system made in view of the above circumstances, and includes an outdoor unit, a plurality of indoor units connected to the outdoor unit by refrigerant piping, and an auxiliary power supply device connected to each indoor unit,
  • the indoor unit includes a device that operates with DC power, a first power supply circuit, and a remote controller.
  • the first power supply circuit converts AC power supplied from a commercial power source into DC power having a predetermined voltage and supplies the DC power to the device.
  • the auxiliary power supply device includes a second power supply circuit that is connected to the indoor unit and converts AC power supplied from a commercial power source into DC power of the predetermined voltage, and is capable of supplying AC power to the first power supply circuit. When cut off, DC power is supplied from the second power supply circuit to the device.
  • the remote controller includes a display screen and operates with direct current power to operate the indoor unit.
  • the air conditioning system includes means for hiding the display screen of the remote controller when the supply of AC power to the first power supply circuit is interrupted.
  • FIG. 1 is an explanatory diagram showing the flow of refrigerant in the air conditioning system according to the first and second embodiments.
  • FIG. 2 is a circuit diagram of the indoor unit of the air conditioning system according to the first embodiment.
  • FIG. 3A is a front view showing a state where the display screen of the remote controller of the air conditioning system according to the first and second embodiments is turned on, and
  • FIG. 3B shows a state where the display screen is turned off. It is a front view.
  • FIG. 4 is a flowchart showing operations of the indoor controller and the auxiliary power supply of the air conditioning system according to the first embodiment.
  • FIG. 5 is a circuit diagram of the indoor unit of the air conditioning system according to the second embodiment.
  • FIG. 1 is an explanatory diagram showing a schematic configuration of an air conditioning system 1A according to the present embodiment and a refrigerant flow in the air conditioning system 1A.
  • the air conditioning system 1A is configured by connecting an outdoor unit 10 and a plurality of indoor units 20-1 and 20-2 through a refrigerant pipe 30.
  • FIG. 1 shows a case where two indoor units 20-1 and 20-2 are connected to the outdoor unit 10 for the sake of simplification. Has been.
  • the outdoor unit 10 operates with power supplied from a commercial power source 101 of 400V three-phase AC via the breaker 102, for example, and the indoor unit 20-1 is a commercial power source 201-1 of 200V single-phase AC.
  • the indoor unit 20-2 operates with the same power supplied from the commercial power source 201-1 as the indoor unit 20-1 through the breaker 202-2.
  • the breaker 102 is provided in a place where the user cannot operate, such as outdoors or an administrator room.
  • the outdoor unit 10 When the air conditioning system 1A operates in the cooling mode, in the outdoor unit 10, after the refrigerant is compressed to high temperature and high pressure by the compressor 11, it is sent to the outdoor heat exchanger 13 via the four-way valve 12, and the outdoor heat exchanger 13 is liquefied. And the liquefied refrigerant
  • coolant is rapidly expanded by the expansion valve 14, and is made low temperature low pressure.
  • the refrigerant thus generated is supplied to the indoor units 20-1 and 20-2 via the refrigerant pipe 30.
  • the indoor units 20-1 and 20-2 are provided with indoor heat exchangers 21-1 and 21-2, and the refrigerant passing through the refrigerant pipe 30 is taken in from the connection pipes 22-1 and 22-2. It is supplied to the indoor heat exchangers 21-1 and 21-2.
  • electric expansion valves 23-1, 23-2 for controlling the flow (flow rate) of the refrigerant flowing in the pipes are installed. These electric expansion valves 23-1 and 23-2 can be changed in opening degree by electric power.
  • the amount of refrigerant supplied to the indoor heat exchangers 21-1 and 21-2 is controlled by the opening degree of the electric expansion valves 23-1 and 23-2.
  • a valve device of a type that is generally called a pulse motor valve and that controls the needle valve to move in and out by a pulse motor whose rotation angle changes with pulse power is used. Is done.
  • the refrigerant flows in the opposite direction by switching the connection direction of the four-way valve 12, and the compressed high-temperature refrigerant flows through the indoor heat exchangers 21-1 and 21-2. Used for.
  • the outdoor controller 15 installed in the outdoor unit 15 and the indoor controllers 24-1 and 24-2 installed in the indoor units 20-1 and 20-2, respectively, are communication lines. And various types of information are transmitted and received between them.
  • Remote controllers 25-1 and 25-2 are connected to the indoor controllers 24-1 and 24-2, respectively.
  • the remote controllers 25-1 and 25-2 control the indoor units 20-1 and 20-2. It is possible to manipulate the movement.
  • Equipment such as the electric expansion valves 23-1 and 23-2 built in these indoor units 20-1 and 20-2, and remote controllers 25-1 and 25 connected to the indoor units 20-1 and 20-2 -2 operates with low voltage DC power.
  • FIG. 2 is a schematic circuit diagram relating to one indoor unit 20 (indoor unit 20-1 or 20-2) connected to the outdoor unit 10 in the air conditioning system 1A.
  • the plurality of indoor units 20-1 and 20-2 connected to the outdoor unit 10 have the same configuration.
  • the indoor unit 20 includes a drain pump for discharging condensed water generated by the electric expansion valve 23, the indoor controller 24, and the indoor heat exchanger 21 (see FIG. 1), and a blowout from the indoor unit 20.
  • a drive circuit 26 that drives a motor that rotates a wind direction changing plate (louver) that changes the wind direction of the wind, an indoor fan (not shown), and the like are provided.
  • the electric expansion valve 23, the indoor controller 24, the motor for rotating the drain pump and the wind direction changing plate, etc. works with.
  • the indoor fan is driven by direct-current power, but operates with a high-voltage direct current obtained by full-wave rectifying the power supply voltage, so that power is supplied from another power supply circuit (not shown).
  • the remote controller 25 is connected to the indoor controller 24. Further, an auxiliary power supply device (auxiliary power supply device) 27 is connected to the indoor unit 20.
  • the remote controller 25 operates with the electric power supplied from the indoor controller 24, and the user operates the liquid crystal display screen 25a and the operation of the outdoor unit 20 as shown in FIGS. 3 (a) and 3 (b). And a button group 25b.
  • the display screen 25a is driven to a display state (lighted state), and as shown in FIG. 3A, current time information, room temperature information, or button group 25b. Operation information and the like are displayed.
  • no power is supplied to the remote controller 25 or when the remote controller 25 is in the sleep mode, as shown in FIG. 3B, no display is made on the display screen 25a (no light). become.
  • the indoor controller 24 includes a first power supply circuit 241, an MCU (Micro Controller Unit) 242, and a switch 246 that switches whether to supply power to the remote controller 25.
  • the switch 246 only needs to have a function of switching whether or not power is supplied to the remote controller 25 (energization and cutoff), and may be configured by a relay, a transistor, or a FET (Field Effect Transistor).
  • the first power supply circuit 241 uses DC power supplied from a single-phase 200 V commercial power supply 201 via a circuit breaker (breaker) 202, and direct current of multiple levels of voltage required for the operation of each device in the indoor unit 20 Generate power.
  • the first power supply circuit 241 is a constant voltage DC power source that once rectifies AC power from the commercial power source 201 and then generates two low-voltage DC power of 12 V and 5 V by a DC / DC converter. Then, the 12V electric power generated by the first power supply circuit 241 and output from the output terminal is supplied to the electric expansion valve 23 and the drive circuit 26 via the first wiring 243, and is further branched from the first wiring 243. It is supplied to the remote controller 25 via the wiring 244. Further, the 5 V power generated by the first power supply circuit 241 and output from the output terminal is supplied to the MCU 242 via the third wiring 245.
  • the MCU 242 controls the operation of the devices in the indoor unit 20 such as the electric expansion valve 23, the drive circuit 26, the fan (not shown), the switch 246, and the remote controller 25 based on an instruction from the outdoor unit 10.
  • the switch 246 is connected in series in the middle of the second wiring 244 to which 12V DC power generated by the first power supply circuit 241 is supplied.
  • the opening / closing control of the switch 246 by the MCU 242 will be described later.
  • the auxiliary power supply 27 is a small box installed outside the indoor unit 20, and is connected to the commercial power supply 201 of AC 200V same as the indoor unit 20 via the breaker 204.
  • the commercial AC power source to which the auxiliary power supply 27 is connected may be an AC power source different from the commercial power source 201 to which the indoor unit 20 is connected.
  • the auxiliary power supply 27 is provided with a second power circuit 271 and a power monitor 272.
  • the second power supply circuit 271 generates low-voltage DC power using AC power from the commercial power supply 201 supplied via the breaker 204.
  • the low-voltage DC power generated by the second power supply circuit 271 is a device that requires operation even when the AC power supplied to the first power supply circuit 241 is cut off and the first power supply circuit 241 is stopped, for example, an electric expansion valve DC power required for the operation of 23 and the like.
  • the second power supply circuit 271 generates 12V and 5V low-voltage DC power substantially the same as the first power supply circuit 241.
  • Auxiliary power supply 27 is composed of a step-down transformer, a rectifier, and a DC / DC converter.
  • the AC power from the commercial power source 201 is stepped down to a low voltage AC of about 24V AC by a step-down transformer, converted to DC by a rectifier, and this DC is converted to a desired constant voltage of 12V DC and 5V DC by a DC / DC converter.
  • Output Although the auxiliary power supply 27 is connected to a 200V AC commercial power supply, a step-down transformer is installed outside the auxiliary power supply 27, and the auxiliary power supply 27 receives a low voltage AC of about 24V AC as a power source. May be.
  • the breaker 202 inserted into the power supply path to the indoor control unit 24 is provided on the upper wall surface of the room in which the indoor unit 10 is installed, and is in a state that can be turned on / off by the user of the indoor unit.
  • the breaker 204 inserted in the power supply path to the auxiliary power supply 27 is provided in a manager's room or the like and is in a place where an on / off operation by the user of the indoor unit is impossible. It is in the state where electric power is supplied from.
  • the 12V DC power generated by the second power supply circuit 271 and output from the output terminal is supplied to the indoor controller 24 through the fourth wiring 28-1, and the 5V DC power is supplied through the fifth wiring 28-2 to the indoor controller. 24.
  • the fourth wiring 28-1 is connected to the 12V first wiring 243 of the indoor controller 24.
  • the fifth wiring 28-2 is connected to the third wiring 245 for 5V of the indoor controller 24.
  • the power supply monitoring unit 272 monitors the presence / absence of AC power supply from the commercial power supply 201 to the indoor controller 24 via the breaker 202, that is, the on / off state of the breaker 202, and based on the monitoring result, the second power supply circuit 271. Switch the presence or absence of AC power supply to.
  • a specific power supply monitoring unit 272 a first contact 273A that is a normally closed contact, a second contact 273B that is also a normally closed contact, and these contacts 273A and 273B when AC power is supplied.
  • Some are constituted by a two-contact relay having a relay coil 273C that is driven to an open state.
  • the relay coil 273C is connected to the commercial power supply 201 via the breaker 202 in the same manner as the first power supply circuit 241.
  • the relay coil 273C is energized by the AC power supplied from the commercial power source 201, and the two contacts 273A and 273B are opened.
  • the relay coil 273C is in a non-energized state, and the two contacts 273A and 273B are in a closed state.
  • the first contact 273A has one end connected to the commercial power supply 201 and the other end connected to the power input terminal of the second power supply circuit 271. For this reason, the supply of AC power from the commercial power supply 201 to the second power supply circuit 271 is interrupted when the first contact 273A is opened, and the commercial power supply 201 to the second power supply circuit 271 when the first contact 273A is closed. AC power is supplied.
  • the MCU 242, the drive circuit 26, the electric expansion valve 23, and the like operate with 12V and 5V DC power supplied from the first power supply circuit 241 in the indoor controller 24 when the breaker 202 is in the ON state.
  • the breaker 202 When 202 is in an off state, it operates with 12V and 5V DC power supplied from the second power supply circuit 271.
  • the devices installed in the main body of the indoor unit 20 such as the MCU 242, the drive circuit 26, and the electric expansion valve 23 can operate. Further, since the MCU 242 can operate, communication of signal exchange with the outdoor controller 15 can also be performed.
  • both ends of the second contact 273B are connected to two input terminals of the MCU 242 of the indoor controller 24, respectively.
  • the MCU 242 monitors the open / closed state of the second contact 273B, that is, the presence / absence of AC power supply from the commercial power supply 201 (ON / OFF state of the breaker 202) by detecting the presence / absence of conduction between the two input terminals. To do.
  • the MCU 242 of the indoor controller 24 detects that the second contact 273B is in the open state, the MCU 242 determines that the breaker 202 is in the on state, and turns on the switch 246 to supply power to the remote controller 25. On the other hand, when it is detected that the second contact 273B is in the closed state, it is determined that the breaker 202 is in the off state, the switch 246 is turned off, and the power supply from the second wiring 244 to the remote controller 25 is cut off.
  • the second wiring 244 is a wiring branched from the first wiring 243, and the first wiring 243 that is the source of the second wiring 244 is connected to the fourth wiring 28-1.
  • the air conditioning system 1A configured as described above operates and the refrigerant circulates through the refrigerant pipe 30, only a small amount of lubricating oil is contained in the compressor 11 of the outdoor unit 10 and lubricates the sliding parts. However, it circulates in the refrigerant pipe 30 similarly to the refrigerant. Among the circulating lubricating oil, some of the lubricating oil adheres to and stays on the inner surfaces of the indoor heat exchangers 21-1, 21-2, the refrigerant pipe 30, and the connecting pipes 22-1, 22-2. There is a possibility that the amount of lubricating oil in 11 will be reduced and a malfunction will occur.
  • the air conditioning system 1A stays on the inner surfaces of the indoor heat exchangers 21-1, 21-2, the refrigerant pipe 30, and the connection pipes 22-1, 22-2.
  • the oil recovery operation for recovering the lubricating oil is periodically performed. Specifically, the outdoor controller 15 in the outdoor unit 10 accumulates the operation continuation time of the compressor 11, and when it reaches a predetermined time, it is in each of the indoor units 20-1 and 20-2 via the communication line. The indoor controllers 24-1 and 24-2 are notified of the start of the oil recovery operation.
  • the refrigeration cycle of the outdoor unit 10 is set to the cooling mode, and the connection pipes 22-1 and 22-2 in all the indoor units 20-1 and 20-2 including the stopped indoor unit are in the middle. This is executed by opening the electric expansion valves 23-1 and 23-2 installed in. Therefore, when the indoor controllers 24-1 and 24-2 obtain the oil recovery operation start notification, the indoor controllers 24-1 and 24-2 open the electric expansion valves 23-1 and 23-2 to enable the oil recovery operation.
  • the air conditioning system 1A also includes the indoor units 20-1 and 20-2 in which the indoor unit breaker 202 is turned off by the user.
  • the electric expansion valves 23-1 and 23-2 can be operated from the closed state to the open state with a predetermined opening degree.
  • step S ⁇ b> 1 12V DC power generated by the first power supply circuit 241 is supplied to the remote controller 25.
  • the auxiliary power supply 27 constantly monitors the on / off state of the breaker 202, that is, whether or not electric power is supplied from the commercial power supply 201 to the indoor controller 24 via the breaker 202 (S2).
  • the MCU 242 of the indoor controller 24 is instructed by the outdoor controller 15 to instruct the oil recovery operation via the communication line.
  • the electric expansion valve 23 is opened and the oil recovery operation can be performed normally.
  • the MCU 242 of the indoor controller 24 can receive this signal and close the electric expansion valve 23 to end the oil recovery operation. .
  • the switch 246 is switched to the off state (S5).
  • the switch 246 is switched to the OFF state, power is not supplied from the auxiliary power supply 27 to the remote controller 25, and the display screen 25a is turned off and is not displayed. Therefore, it is possible to avoid a situation in which the display screen 25a of the remote controller 25 is in the display state (lighted) and causes user confusion even though the user operates the breaker 202 in the off state.
  • the switch 246 is provided in the indoor controller 24 in order to hide the display screen 25a of the remote controller 25.
  • the remote controller 25 and the indoor controller 24 communicate with each other, when the power supply to the first power supply circuit 241 is cut off without providing the switch 246, the remote controller 25 and the indoor controller 24 are not controlled by the remote controller 25. 25, an instruction for shifting to the sleep mode in which the display screen 25a is not displayed is output, and when the power supply to the first power supply circuit 201 is resumed, an instruction for canceling the sleep mode is issued. By outputting, the display screen 25a of the remote controller 25 may be hidden while the breaker 202 is off.
  • the air conditioning system according to the second embodiment will be described with reference to FIG.
  • the air conditioning system 1B according to the second embodiment does not provide a wiring (second wiring 244 in the air conditioning system 1A in the first embodiment) for connecting the first wiring 243 in the indoor controller 24 and the remote controller 25,
  • An independent sixth wiring 247 that directly connects the first power supply circuit 241 and the remote controller 25 is provided.
  • the sixth wiring 247 is not connected to the fourth wiring 28-1 connected to the auxiliary power supply 27. That is, the output terminal of the auxiliary power supply 27 is not connected to the remote controller 25. Except for this part, since it is the same as that of the structure of 1 A of air conditioning systems demonstrated in 1st Embodiment, detailed description is abbreviate
  • omitted since it is the same as that of the structure of 1 A of air conditioning systems demonstrated in 1st Embodiment, detailed description is abbreviate
  • the air conditioning system 1B when the breaker 202 is operated to be turned off by the user in any of the indoor units 20 connected to the outdoor unit 10, the same as in the first embodiment.
  • the supply of power from the commercial power supply 201 to the indoor controller 24 via the breaker 202 is stopped, and the supply of low-voltage power from the auxiliary power supply 27 to the indoor controller 24 is started.
  • 12V power supplied from the auxiliary power supply 27 via the fourth wiring 28-1 is supplied to the electric expansion valve 23 and the drive circuit 26 via the first wiring 243. Therefore, even after the power shut-off operation by the breaker 202 is performed, it is possible to operate devices operating with low-voltage power such as the electric expansion valve 23 and the drive circuit 26.
  • the 5V power supplied from the auxiliary power supply 27 via the fifth wiring 28-2 is supplied to the MCU 242 via the third wiring 245, and the operation of the MCU 242 is continued.
  • the remote controller 25 is supplied with electric power from the first power supply circuit 241 via the sixth wiring 247 when the breaker 202 is in the ON state.
  • the sixth wiring 247 is not connected to the auxiliary power supply 27, the power supply is stopped when the breaker 202 is turned off, and the display screen 25a is not displayed as shown in FIG. It becomes a state. Therefore, it is possible to avoid a situation in which the display screen 25a of the remote controller 25 is turned on and causes user confusion even though the user operates the breaker 202 in the off state.
  • the breaker 202 of the indoor unit 20 is installed in a place where the user cannot easily operate, so that it is not in use.
  • the auxiliary power supply 27 may not be connected to the indoor unit 20 where the breaker 202 is not likely to be turned off by the user.
  • the power supply monitoring unit 272 is configured by a relay having two contacts, but the power supply monitoring unit 272 determines whether or not power is supplied from the commercial power supply 201 to the indoor controller 24. If it has the function of controlling the presence / absence of power supply to the second power supply circuit 271 based on the presence / absence of power supply from the commercial power supply 201 to the indoor controller 24 based on the function that the MCU 242 detects. It may be configured. For this reason, the power supply monitoring unit 272 uses a photocoupler or an electrical logic circuit that can execute these two functions based on the presence / absence of power input from the commercial power supply 201 via the breaker 202 without using a relay. You may comprise by a combination.

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  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
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  • Air Conditioning Control Device (AREA)

Abstract

L'invention concerne un système de climatisation (1A, 1B) comprenant une unité extérieure (10) et une pluralité d'unités intérieures (20), l'invention comprenant : un dispositif d'alimentation en énergie auxiliaire (27) pour alimenter l'énergie depuis un second circuit de source d'énergie (271) vers les unités intérieures (20) lorsque le premier circuit de source d'énergie (241) pour alimenter l'énergie aux unités intérieures (20) est dans un état d'arrêt ; et une unité de commande à distance (25) pour faire fonctionner les actions des unités intérieures (20). Le système de climatisation (1A, 1B) n'affiche pas un écran d'affichage sur l'unité de commande à distance (25) lorsque l'énergie n'est pas alimentée par le premier circuit de source d'énergie (241). Grâce à la présente invention, il est possible d'empêcher des circonstances dans lesquelles un écran d'affichage tel que l'affichage à cristaux liquides de l'unité de commande à distance est en mode d'affichage malgré l'arrêt de la source d'énergie et dans lesquelles l'utilisateur est confus parce qu'il ne sait pas si la source d'énergie a été actionnée normalement ; ou des circonstances dans lesquelles un autre utilisateur, qui n'a pas arrêté l'alimentation en énergie suppose par erreur que les unités intérieures peuvent être actionnées parce que l'écran d'affichage de l'unité de commande à distance est en mode d'affichage.
PCT/JP2015/083403 2015-11-27 2015-11-27 Système de climatisation et unité intérieure utilisée dans celui-ci WO2017090182A1 (fr)

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EP15909299.8A EP3382294B1 (fr) 2015-11-27 2015-11-27 Système de climatisation
PCT/JP2015/083403 WO2017090182A1 (fr) 2015-11-27 2015-11-27 Système de climatisation et unité intérieure utilisée dans celui-ci

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JP7477738B2 (ja) 2019-03-19 2024-05-02 ダイキン工業株式会社 冷凍サイクル装置

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