WO2023166670A1 - 給電切替回路及び空気調和機 - Google Patents

給電切替回路及び空気調和機 Download PDF

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Publication number
WO2023166670A1
WO2023166670A1 PCT/JP2022/009167 JP2022009167W WO2023166670A1 WO 2023166670 A1 WO2023166670 A1 WO 2023166670A1 JP 2022009167 W JP2022009167 W JP 2022009167W WO 2023166670 A1 WO2023166670 A1 WO 2023166670A1
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WO
WIPO (PCT)
Prior art keywords
power supply
voltage
actuator
unit
control circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/009167
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English (en)
French (fr)
Japanese (ja)
Inventor
遼平 鈴木
友樹 田嶋
裕太 杉山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2022/009167 priority Critical patent/WO2023166670A1/ja
Priority to JP2024504272A priority patent/JP7686138B2/ja
Publication of WO2023166670A1 publication Critical patent/WO2023166670A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems

Definitions

  • the present disclosure relates to a power supply switching circuit and an air conditioner that switch power supply to an actuator mounted on equipment between an external power supply and an internal power supply.
  • Patent Document 1 discloses an air conditioner equipped with a battery that is charged by receiving electric power from a commercial power supply that is an external power supply and that is an internal power supply for supplying secondary power to an actuator of the air conditioner. is disclosed.
  • the state of power supply from the commercial power source is detected, and when it is determined that the supply of power has been interrupted, the power switching means controls the secondary power supply of the battery so that the controller can continue the control operation. It supplies power to the controller.
  • Patent Document 1 In the conventional technology represented by Patent Document 1 above, when the power from the commercial power supply is cut off, it is necessary to temporarily stop the air conditioning operation. Therefore, in the conventional technology, there is a problem that it is necessary to stop the operation of the device in order to switch to the power supply from the battery, which is the internal power source.
  • the present disclosure has been made in view of the above, and aims to obtain a power supply switching circuit capable of switching to power supply from an internal power supply without stopping the operation of the device.
  • the power supply switching circuit is arranged between an external power supply that is an AC power supply and an actuator, and supplies power to the actuator between the external power supply and the internal power supply. to switch.
  • the power supply switching circuit includes a control circuit having a control section, a voltage detection section, a first cutoff section, and a switching section.
  • the control unit is constantly applied with a voltage from an internal power source and controls the operation of the actuator.
  • the voltage detection unit detects the voltage value of the AC voltage output by the external power supply.
  • the first cutoff unit is arranged between the connection point where the external power supply and the voltage detection unit are connected and the control circuit, and cuts off the power supply to the actuator of the AC voltage applied to the actuator via the control circuit. .
  • the switching section closes so that the voltage output from the internal power supply is applied to the control circuit when the first cutoff section opens.
  • the power supply switching circuit it is possible to switch to the power supply from the internal power supply without stopping the operation of the device.
  • FIG. 1 is a diagram showing a configuration example of an air conditioner according to Embodiment 1.
  • FIG. Flowchart for explaining power supply switching operation in Embodiment 1 Time chart for explaining power supply switching operation in Embodiment 1 1 is a block diagram showing an example of a hardware configuration for realizing functions of a control unit according to Embodiment 1;
  • FIG. 4 is a block diagram showing another example of the hardware configuration for realizing the functions of the control unit according to Embodiment 1;
  • FIG. FIG. 10 is a diagram showing a configuration example of an air conditioner according to Embodiment 2;
  • FIG. 1 is a diagram showing a configuration example of an air conditioner 100 according to Embodiment 1.
  • FIG. An air conditioner 100 according to Embodiment 1 includes a battery 3 , an actuator 22 , and a power supply switching circuit 50 .
  • the power supply switching circuit 50 is arranged between the AC power supply 20 and the actuator 22 . While the AC power supply 20 is an external power supply, the battery 3 is an internal power supply built into the air conditioner 100 .
  • the power supply switching circuit 50 has a function of switching power supply to the actuator 22 between the AC power supply 20 and the battery 3 .
  • the power supply switching circuit 50 includes a voltage detection section 1 , a control circuit 2 , a cutoff section 4 and a switching section 5 .
  • the control circuit 2 also includes a control section 7 .
  • An actuator 22 is connected to the control circuit 2 .
  • An example of the actuator 22 is, although not shown, a blower fan of the indoor or outdoor unit of the air conditioner 100, or a flap that adjusts the wind direction of the indoor unit.
  • the control unit 7 of the control circuit 2 controls the operation of the actuator 22 by controlling the drive current flowing through the fan motor that drives the blower fan or the stepping motor that operates the flap.
  • the voltage detection unit 1 is connected to both ends of the AC power supply 20 and detects the voltage value of the AC voltage output by the AC power supply 20 .
  • the air conditioner 100 is an example of equipment, and the actuator 22 may be an apparatus or device provided in equipment other than the air conditioner.
  • the breaker 4 has a switching contact (not shown).
  • the opening/closing operation of the cutoff section 4 is controlled by the control section 7 .
  • the cutoff unit 4 is arranged on one electric wiring 8 connecting between the AC power source 20 and the voltage detection unit 1 .
  • the cutoff unit 4 is arranged between the control circuit 2 and one connection point 12 where the AC power supply 20 and the voltage detection unit 1 are connected.
  • the cutoff unit 4 may be arranged on the other electrical wiring 9 that connects the AC power supply 20 and the voltage detection unit 1 .
  • the breaker 4 is arranged between the control circuit 2 and the other connection point 13 where the AC power supply 20 and the voltage detector 1 are connected.
  • the AC voltage output from the AC power supply 20 is applied to the actuator 22 via the cutoff section 4 and the control circuit 2 .
  • the cutoff unit 4 is controlled by the control unit 7 and cuts off the power supply of the AC voltage applied to the actuator 22 to the actuator 22 .
  • the cutoff part 4 may be described as a "first cutoff part".
  • the switching unit 5 has switching contacts (not shown). The opening/closing operation of the switching section 5 is controlled by the control section 7 .
  • the switching unit 5 is connected between the electric wiring 8 and the battery 3 .
  • the contact of the switching unit 5 is controlled to close. Therefore, the switching unit 5 closes so that the voltage output from the battery 3 is applied to the control circuit 2 when the breaking unit 4 opens.
  • the control unit 7 is configured so that the voltage from the battery 3 is constantly applied. With this configuration, even when the power supply to the actuator 22 is switched from the AC power supply 20 to the battery 3 , the control unit 7 can switch the power supply without stopping the air conditioning operation of the air conditioner 100 . In addition, with this configuration, switching of power supply from the AC power supply 20 to the battery 3 can be self-sufficient by the air conditioner 100 without depending on an external signal.
  • the battery 3 is connected between the electrical wiring 8 and the electrical wiring 9 .
  • a connection point on the electric wiring 8 side exists between the breaker 4 and the control circuit 2 . Therefore, when the interrupter 4 and the control circuit 2 are electrically connected to each other, the battery 3 simultaneously supplies power to the actuator 22 and charges the battery 3 from the AC power supply 20. are connected to the power supply switching circuit 50 as shown in FIG.
  • FIG. 2 is a flowchart for explaining a power supply switching operation according to Embodiment 1.
  • FIG. FIG. 3 is a time chart for explaining the power supply switching operation according to the first embodiment. 2 and 3, the AC power supply 20 is called an "external power supply”.
  • battery “OFF” means that the battery 3 and the control circuit 2 are not electrically connected
  • battery “ON” means that the battery 3 and the control circuit 2 are electrically connected.
  • the control unit 7 controls opening/closing operations of the blocking unit 4 and the switching unit 5 based on the detection result of the voltage detection unit 1 .
  • the control unit 7 detects whether or not the AC voltage is a different voltage based on the detection result of the voltage detection unit 1 in a state where the power supply to the actuator 22 is from the external power supply (step S11) (step S11).
  • “different voltage” means that the AC voltage is not normal voltage, and is a concept including that the AC voltage is abnormal voltage.
  • the determination of whether or not the AC voltage is the different voltage is based on the first detection value of the voltage detection unit 1, which is a threshold value on the higher potential side.
  • determination is made based on the threshold value and a second threshold value which is a threshold value on the lower potential side. Specifically, when the detected value of the AC voltage is within the range between the first threshold value and the second threshold value, the control unit 7 determines that the AC voltage is normal voltage. Further, when the detected value of the AC voltage is outside the range between the first threshold value and the second threshold value, the control unit 7 determines that the AC voltage is the different voltage.
  • step S12 when the normal voltage is detected, the process of step S12 is repeated. On the other hand, when an abnormal voltage is detected in step S12, the control unit 7 switches to power supply from the battery 3 (step S13).
  • step S14 the control unit 7 detects whether or not the AC voltage is a different voltage based on the detection result of the voltage detection unit 1 (step S14).
  • step S14 if the different voltage is detected, that is, if the different voltage continues to be detected, the control unit 7 continues power supply from the battery 3 (step S15). After that, the process returns to step S14.
  • step S16 when a normal voltage is detected in step S14, the control unit 7 switches to power supply from the external power source (step S16). After that, the process returns to step S12, and the process from step S12 is repeated.
  • the period before time t1, the period from time t2 to time t3, and the period after time t4 indicate periods in which the detected value of the voltage detection unit 1 is normal voltage.
  • the contact of the breaking unit 4 is controlled to be closed and the contact of the switching unit 5 is controlled to be open so that the battery 3 is turned off.
  • a period from time t1 to time t2 and a period from time t3 to time t4 indicate periods in which the detected value of the voltage detection unit 1 is a different voltage.
  • the contact of the breaking unit 4 is controlled to open and the contact of the switching unit 5 is controlled to close so that the battery 3 is turned on.
  • FIG. FIG. 4 is a block diagram showing an example of a hardware configuration for realizing the functions of the control section 7 according to Embodiment 1. As shown in FIG. When realizing the functions of the control unit 7 in Embodiment 1, as shown in FIG. can be configured to include an interface 204 that performs
  • the processor 200 is an example of computing means.
  • the processor 200 may be a computing means called a microprocessor, microcomputer, microcontroller, CPU (Central Processing Unit), or DSP (Digital Signal Processor).
  • the memory 202 includes nonvolatile or volatile semiconductor memories such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), EEPROM (registered trademark) (Electrically EPROM), Magnetic discs, flexible discs, optical discs, compact discs, mini discs, and DVDs (Digital Versatile Discs) can be exemplified.
  • the memory 202 stores a program for executing the functions of the control unit 7 in Embodiment 1 and the two threshold values described above.
  • the processor 200 exchanges necessary information via the interface 204, the processor 200 executes the program stored in the memory 202, and the processor 200 refers to the two thresholds stored in the memory 202.
  • the processing described above can be performed. Results of operations performed by processor 200 may be stored in memory 202 .
  • FIG. 5 is a block diagram showing another example of the hardware configuration for realizing the functions of the controller 7 according to the first embodiment.
  • processor 200 and memory 202 shown in FIG. 4 are replaced by processing circuitry 203 .
  • the two thresholds mentioned above are held in the processing circuit 203 .
  • the processing circuit 203 corresponds to a single circuit, a composite circuit, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof.
  • Information to be input to the processing circuit 203 and information to be output from the processing circuit 203 can be obtained via the interface 204 .
  • the power supply switching circuit is arranged between the external power supply, which is an AC power supply, and the actuator, and switches the power supply to the actuator between the external power supply and the internal power supply.
  • the power supply switching circuit includes a control circuit having a control section, a voltage detection section, a first cutoff section, and a switching section.
  • the control unit is constantly applied with a voltage from an internal power source and controls the operation of the actuator.
  • the voltage detection unit detects the voltage value of the AC voltage output by the external power supply.
  • the first cutoff unit is arranged between the connection point where the external power supply and the voltage detection unit are connected and the control circuit, and cuts off the power supply to the actuator of the AC voltage applied to the actuator via the control circuit. .
  • the switching section closes so that the voltage output from the internal power supply is applied to the control circuit when the first cutoff section opens. Accordingly, even when the power supply to the actuator is switched from the external power supply to the internal power supply, the power supply can be switched without stopping the air conditioning operation of the air conditioner. Also, the switching of power supply from the external power supply to the internal power supply can be self-contained by the air conditioner without depending on an external signal.
  • the first cutoff section opens and the switching section closes.
  • the operations of the first cutoff section and the switching section are controlled by the control section to which the voltage from the internal power supply is constantly applied.
  • the air conditioner according to Embodiment 1 includes an actuator, an internal power supply, and a power supply switching circuit that switches power supply to the actuator between an external power supply that is an AC power supply and an internal power supply.
  • the power supply switching circuit includes a control circuit having a control section, a voltage detection section, a first cutoff section, and a switching section.
  • the control unit is constantly applied with a voltage from an internal power source and controls the operation of the actuator.
  • the voltage detection unit detects the voltage value of the AC voltage output by the external power supply.
  • the first cutoff unit is arranged between the connection point where the external power supply and the voltage detection unit are connected and the control circuit, and cuts off the power supply to the actuator of the AC voltage applied to the actuator via the control circuit. .
  • the switching section closes so that the voltage output from the internal power supply is applied to the control circuit when the first cutoff section opens. Accordingly, even when the power supply to the actuator is switched from the external power supply to the internal power supply, the power supply can be switched without stopping the air conditioning operation of the air conditioner. Also, the switching of power supply from the external power supply to the internal power supply can be self-contained by the air conditioner without depending on an external signal.
  • the internal power supply supplies power to the actuator by the external power supply and the internal It is connected to the power supply switching circuit so that charging to the power supply is performed at the same time.
  • the internal power supply can be kept in an operable state without performing a special charging operation.
  • FIG. 6 is a diagram showing a configuration example of an air conditioner 100A according to Embodiment 2.
  • air conditioner 100A according to Embodiment 2 power supply switching circuit 50 in the configuration of air conditioner 100 according to Embodiment 1 shown in FIG. 1 is replaced with power supply switching circuit 50A.
  • a cutoff unit 6 is added to the configuration of FIG.
  • the breaker 6 has a switching contact (not shown).
  • the opening/closing operation of the cutoff section 6 is controlled by the control section 7 .
  • the cutoff unit 6 is arranged on the other electrical wiring 9 that connects the AC power supply 20 and the voltage detection unit 1 .
  • the cutoff unit 6 is arranged between the control circuit 2 and the other connection point 13 where the AC power supply 20 and the voltage detection unit 1 are connected.
  • Other configurations are the same as or equivalent to those in FIG. 1, and the same or equivalent components are denoted by the same reference numerals, and duplicate descriptions are omitted.
  • the blocking section 6 may be referred to as a "second blocking section".
  • the cutoff unit 6 is provided to ensure the operation of the power supply switching circuit 50A. Therefore, the blocking section 6 is controlled in the same manner as the blocking section 4 . Therefore, when the breaking section 4 closes, the breaking section 6 also closes, and when the breaking section 4 opens, the breaking section 6 also opens.
  • the power supply switching circuit 50A configured as described above, even if one of the contacts of the breakers 4 and 6 has a short-circuit fault, the other breaker that is not short-circuited will switch the power supply from the AC power supply 20.
  • the circuit section that supplies power is reliably cut off. As a result, it is possible to prevent a failure from spreading to circuit elements other than the cutoff units 4 and 6, and to reliably protect the power supply switching circuit 50A.
  • the power supply switching circuit according to the second embodiment is arranged on the other electrical wiring for electrically connecting the external power source and the control circuit, and performs the same operation as the first cutoff unit. It further comprises a second blocking part for As a result, it is possible to prevent a failure from spreading to circuit elements other than the first and second cutoff units, and to reliably protect the power supply switching circuit.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Air Conditioning Control Device (AREA)
PCT/JP2022/009167 2022-03-03 2022-03-03 給電切替回路及び空気調和機 Ceased WO2023166670A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2022/009167 WO2023166670A1 (ja) 2022-03-03 2022-03-03 給電切替回路及び空気調和機
JP2024504272A JP7686138B2 (ja) 2022-03-03 2022-03-03 給電切替回路及び空気調和機

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Application Number Priority Date Filing Date Title
PCT/JP2022/009167 WO2023166670A1 (ja) 2022-03-03 2022-03-03 給電切替回路及び空気調和機

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000028176A (ja) * 1998-07-09 2000-01-25 Sharp Corp 太陽光発電利用空気調和機
JP2008263669A (ja) * 2007-04-10 2008-10-30 Sony Corp 電子機器、電気機器、副電源供給装置、電源システム及び副電源供給制御方法
JP2009011081A (ja) * 2007-06-28 2009-01-15 Nippon Telegr & Teleph Corp <Ntt> 電源システム
WO2015198447A1 (ja) * 2014-06-26 2015-12-30 東芝三菱電機産業システム株式会社 無停電電源装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000028176A (ja) * 1998-07-09 2000-01-25 Sharp Corp 太陽光発電利用空気調和機
JP2008263669A (ja) * 2007-04-10 2008-10-30 Sony Corp 電子機器、電気機器、副電源供給装置、電源システム及び副電源供給制御方法
JP2009011081A (ja) * 2007-06-28 2009-01-15 Nippon Telegr & Teleph Corp <Ntt> 電源システム
WO2015198447A1 (ja) * 2014-06-26 2015-12-30 東芝三菱電機産業システム株式会社 無停電電源装置

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JPWO2023166670A1 (https=) 2023-09-07

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