WO2023282081A1 - 通信アダプタ - Google Patents
通信アダプタ Download PDFInfo
- Publication number
- WO2023282081A1 WO2023282081A1 PCT/JP2022/025126 JP2022025126W WO2023282081A1 WO 2023282081 A1 WO2023282081 A1 WO 2023282081A1 JP 2022025126 W JP2022025126 W JP 2022025126W WO 2023282081 A1 WO2023282081 A1 WO 2023282081A1
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- WIPO (PCT)
- Prior art keywords
- power supply
- power
- voltage value
- microcomputer
- edlc
- Prior art date
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- 238000004891 communication Methods 0.000 title claims abstract description 268
- 238000003860 storage Methods 0.000 claims abstract description 39
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 230000001404 mediated effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 34
- 238000006243 chemical reaction Methods 0.000 description 13
- 238000012544 monitoring process Methods 0.000 description 13
- 238000012545 processing Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000007704 transition Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Classifications
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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
- F24F11/88—Electrical aspects, e.g. circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
Definitions
- This disclosure relates to communication adapters.
- the communication adapter in a communication adapter that is connected to an electrical device and receives power supply from the electrical device, includes a power supply terminal that receives power from the electrical device, a current limiting circuit that limits the current when overloaded, and an electric charge.
- a charging unit that stores electricity, a booster circuit that boosts the electric charge stored in the charging unit, and a communication device.
- the communication adapter receives power supply from an electrical device that charges a part, boosts the voltage of the charging part, and supplies power to the communication device.
- the communication adapter has a microcomputer connected to the power supply terminal (see, for example, Patent Document 1).
- conventional communication adapters may not be able to communicate because there is no path to supply power to the microcomputer when the power supply from the electrical device is cut off.
- the purpose is to provide a communication adapter that can communicate even if the power supply from the external device is cut off.
- a power storage unit that receives power supply from an external device and stores power
- a communication unit that receives power supply from the power storage unit
- a control unit capable of communicating with an external management device via the communication unit
- a first power supply line that supplies power from the external device to the control unit without passing through the power storage unit
- a second power supply line that supplies power from the power storage unit to the control unit.
- a switch circuit for switching between the first power supply line and the second power supply line may be further included.
- the control unit may switch between the first power supply line and the second power supply line by driving the switch circuit based on the voltage of the power supplied from the external device.
- the control unit may switch from the first power supply line to the second power supply line when the voltage of the power supplied from the external device becomes equal to or less than a predetermined value.
- the control unit may switch to a power saving mode when the voltage of power supplied from the external device becomes equal to or less than a predetermined value.
- the control unit receives power supply via the first power supply line when receiving power supply from the external device, and receives power supply from the first power supply line when power supply from the external device is interrupted. It may be powered via two power supply lines.
- It may further include a booster unit that boosts the output voltage of the power storage unit and outputs the boosted voltage to the communication unit.
- the communication unit can communicate.
- the first power supply line may supply power to the control unit from an upstream side of the current limiting unit.
- the external device may be an outdoor unit of an air conditioner.
- a power storage unit that receives power supply from an external device and stores power
- a communication unit that receives power supply from the power storage unit
- a control unit capable of communicating with an external management device via the communication unit
- a lower limit value of the capacity of the power storage unit is variable when the control unit communicates with the external management device, and a lower limit of the capacity of the power storage unit when the power storage unit is receiving power supply from the external device.
- the value is a first capacitance value
- the lower limit value of the capacity of the electricity storage unit when power supply from the external device to the electricity storage unit is interrupted is a second capacitance value lower than the first capacitance value
- a communications adapter is provided.
- the control unit may switch to a power saving mode when power supply from the external device is interrupted.
- the control unit may notify the external management device via the communication unit that power supply from the external device has been interrupted, and enter a power saving mode.
- the control unit may detect cutoff of the power supply when a voltage of power supplied from the external device to the power storage unit becomes equal to or lower than a predetermined value.
- control unit can easily detect that the power supply has been interrupted based on the voltage drop of the supplied power.
- control unit When the control unit detects the cutoff of the power supply, the control unit detects that the cutoff of the power supply has occurred to the external management device via the communication unit until the capacity of the power storage unit decreases to the second capacity value. may be notified.
- the notification is sent until the power storage unit decreases to the second capacitance value lower than the first capacitance value, which is the lower limit value when the power storage unit is receiving the power supply from the external device. Therefore, it is possible to more reliably notify the external management device that the power supply has been interrupted.
- the control unit may detect interruption of the power supply, and stop communication by the communication unit when the capacity of the power storage unit becomes lower than the second capacity value.
- the difference between the first capacitance value and the second capacitance value may be a capacitance value that allows the control unit to repeatedly notify the external management device of occurrence of interruption of power supply over a predetermined number of times.
- the control unit can repeatedly notify the external management device of the interruption of the power supply for a predetermined number of times, thereby interrupting the power supply. Sometimes, it is possible to more reliably notify the external management device that the power supply has been interrupted.
- a difference between the maximum capacity value and the first capacity value of the power storage unit may be larger than a difference between the first capacity value and the second capacity value.
- the communication unit normally requires more power than when the power supply is interrupted by transmitting data regarding the external device to the external management device.
- a sufficient capacity of the power storage unit that can be used for communication can be secured.
- the first capacitance value and the second capacitance value may be voltage values of the power storage unit.
- the lower limit value can be easily managed based on the voltage value of the power storage unit.
- the external device may be an outdoor unit of an air conditioner.
- FIG. 2 is a diagram showing an example of the configuration of a communication adapter 100
- FIG. 4 is a diagram for explaining voltage values of an EDLC 130
- FIG. 4A and 4B are diagrams showing an operation example of the communication adapter 100
- FIG. 3 is a diagram showing a flowchart representing processing executed by a microcomputer 180;
- FIG. 1 is a diagram showing an example of the configuration of the communication adapter 100. As shown in FIG. In addition to the communication adapter 100, FIG. 1 shows an outdoor unit 10, an indoor unit 20, a building 30, a network 40, and a cloud server 50.
- the outdoor unit 10 is an example of an external device, and is an outdoor unit of an air conditioner.
- the outdoor unit 10 has a terminal 11A for power supply and a terminal 11B for data output. Terminals 11A and 11B are connectors.
- the terminal 11A is connected to the terminal 101A of the communication adapter 100 via the power line 12A of the cable 12, and the outdoor unit 10 supplies power to the communication adapter 100.
- the cable 12 is one cable including a power line 12A for power supply and a communication line 12B for data communication. As an example, there are actually two power lines 12A and two communication lines 12B.
- the terminal 11B is connected to the terminal 101B of the communication adapter 100 via the communication line 12B of the cable 12, and is connected to the controller of the outdoor unit 10 and the controllers of the plurality of indoor units 20 via data cables.
- the outdoor unit 10 outputs operating status data representing the operating status of the outdoor unit 10 and the plurality of indoor units 20 to the communication adapter 100 .
- Terminals 101A and 100B are two terminals included in one connector as an example. Instead of the single cable 12 including the power line 12A and the communication line 12B, the power line 12A and the communication line 12B may be separate cables.
- the outdoor unit 10 is provided outside the building 30, and is connected to a plurality of indoor units 20 provided inside the building 30 via refrigerant pipes and data cables. Although a configuration in which a plurality of indoor units 20 are connected to one outdoor unit 10 is shown here, the number of indoor units 20 connected to one outdoor unit 10 may be one. Each indoor unit 20 has, for example, a cooling/heating function and a ventilation function.
- the cloud server 50 is an example of an external management device, and is capable of data communication with the communication module 150 of the communication adapter 100 through the network 40 such as the Internet.
- the cloud server 50 is implemented by one or more computer systems, and receives, for example, operating status data representing the operating status of the outdoor unit 10 and the plurality of indoor units 20 from the communication adapter 100 .
- the cloud server 50 receives an operation signal for remotely operating one of the indoor units 20 from a terminal device such as a smartphone of a user of one of the indoor units 20, and receives an operation signal for remotely operating one of the indoor units 20.
- the communication adapter 100 transmits the received operation signal to the outdoor unit 10, and the outdoor unit 10 and the indoor unit 20 are driven according to the operation signal.
- the cloud server 50 does not have to support remote operation of the indoor unit 20 from a terminal such as a smartphone.
- the communication adapter 100 includes a terminal 101A, a terminal 101B, a housing 102, a DC (Direct Current)/DC converter 110, a current limiting circuit 120, and an EDLC (Electrical Double Layer Capacitor) 130.
- Communication adapter 100 further includes DC/DC converter 140 , communication module 150 , switch circuit 160 , LDO (Low Drop Out) 170 , microcomputer 180 , and power supply voltage conversion circuit 190 .
- the current limiting circuit 120 is an example of a current limiting section.
- EDLC 130 is an example of a power storage unit.
- DC/DC converter 140 is an example of a booster.
- Communication module 150 is an example of a communication unit.
- the microcomputer 180 is an example of a control section.
- the communication module 150 of the communication adapter 100 regularly or irregularly transmits operating status data of the outdoor unit 10 and the plurality of indoor units 20 to the cloud server 50 .
- the cloud server 50 can grasp the operation status of the outdoor unit 10 and the plurality of indoor units 20 .
- the cloud server 50 side recognizes whether the cause of the interruption of data transmission is interruption of power supply due to maintenance, power outage, or the like, or communication failure or the like. Can not. Therefore, when the power supply from the outdoor unit 10 is interrupted, the communication adapter 100 transmits interruption occurrence data indicating that the power supply is interrupted to the cloud server 50 via the network 40 .
- the terminal 101A is a terminal that receives power supply from the outdoor unit 10, and is connected to the terminal 11A of the outdoor unit 10 via the power line 12A of the cable 12 outside the communication adapter 100.
- FIG. Terminal 101A is, for example, a connector that can be connected to terminal 11A realized by a connector.
- the power supplied from the outdoor unit 10 is DC power, and for example, the voltage value and the current value are set to predetermined values.
- the terminal 101A may be supplied with power from an external device other than the outdoor unit 10 .
- operating status data representing the operating status of the outdoor unit 10 and the indoor unit 20 may be input to the terminal 101B from an external device other than the outdoor unit 10 .
- the communication adapter 100 may transmit interruption occurrence data to the cloud server 50 via the network 40 when interruption of power supply from an external device other than the outdoor unit 10 occurs.
- the terminal 101A is connected to the input terminal 111 of the DC/DC converter 110 and the input terminal 191 of the power voltage conversion circuit 190 inside the communication adapter 100 . Electric power supplied from the outdoor unit 10 to the terminal 101A is output to the DC/DC converter 110 and the power supply voltage conversion circuit 190 .
- the terminal 101A is a terminal through which the communication adapter 100 can receive power from the outside.
- the communication adapter 100 is in a state where the power supply from the outside is cut off.
- the power supply from the outdoor unit 10 is cut off, for example, when the power supply to the entire building 30 is cut off during maintenance of the building 30, or when power is no longer supplied to the building 30 due to a power failure or the like. .
- the terminal 101B is a data input terminal to which operation status data representing the operation status of the outdoor unit 10 and the plurality of indoor units 20 is input from the outdoor unit 10, and outside the communication adapter 100, via the communication line 12B of the cable 12. is connected to the terminal 11B of the outdoor unit 10.
- Terminal 101B is, for example, a connector that can be connected to terminal 11B realized by a connector.
- the terminal 101B is connected to the terminal 187 of the microcomputer 180 inside the communication adapter 100 and transmits operating status data to the microcomputer 180 .
- the housing 102 is made of resin containing a DC/DC converter 110, a current limiting circuit 120, an EDLC 130, a DC/DC converter 140, a communication module 150, a switch circuit 160, an LDO 170, a microcomputer 180, and a power supply voltage conversion circuit 190. It is a case of manufacturing.
- the housing 102 is configured so that the communication module 150 can communicate with the cloud server 50 via the network 40, and also holds the terminal 101A exposed to the outside.
- the communication adapter 100 can be easily installed by simply connecting the terminal 101A to the terminal 11A of the outdoor unit 10 via the power line 12A of the cable 12 and fixing the housing 102 to the outdoor unit 10.
- the DC/DC converter 110 has an input terminal 111 and an output terminal 112 .
- DC/DC converter 110 is provided between terminal 101A and current limiting circuit 120 and switch circuit 160 . More specifically, input terminal 111 is connected to terminal 101A, and output terminal 112 is connected to input terminal 121 of current limiting circuit 120 and input terminal 161 of switch circuit 160 .
- the DC/DC converter 110 boosts the voltage value of the electric power supplied from the outdoor unit 10 via the terminal 101A and outputs it to the current limiting circuit 120 and the switch circuit 160 .
- the current limiting circuit 120 has an input terminal 121 , an output terminal 122 and a control terminal 123 .
- Current limiting circuit 120 is provided between DC/DC converter 110 and EDLC 130 . More specifically, the input terminal 121 of the current limiting circuit 120 is connected to the output terminal 112 of the DC/DC converter 110, and the output terminal 122 of the current limiting circuit 120 is connected to the input/output terminal 131 of the EDLC 130 and the DC It is connected to the input terminal 141 of the /DC converter 140 . Also, the control terminal 123 is connected to the control terminal 184 of the microcomputer 180 .
- the current limiting circuit 120 is a circuit that limits the current value of the DC power supplied from the DC/DC converter 110 to the EDLC 130 to a predetermined value or less and outputs the current value.
- a predetermined upper limit value for limiting the current value by the current limiting circuit 120 is set by a control signal input from the microcomputer 180 to the control terminal 184 .
- the predetermined value is, for example, either a first predetermined value or a second predetermined value lower than the first predetermined value. Both the first predetermined value and the second predetermined value are fixed values. Either the first predetermined value or the second predetermined value is set by a control signal input from the microcomputer 180 .
- the EDLC 130 has input/output terminals 131 .
- EDLC 130 has an input/output terminal 131 connected to a power transmission line between current limiting circuit 120 and DC/DC converter 140 .
- Input/output terminal 131 is connected to output terminal 122 of current limiting circuit 120 and input terminal 141 of DC/DC converter 140 .
- the input/output terminal 131 is also connected to the terminal 186 of the microcomputer 180 .
- EDLC 130 stores the DC power supplied from current limiting circuit 120 .
- the output voltage of EDLC 130 is proportional to the amount of charge stored by EDLC 130 .
- the output voltage of the EDLC 130 is also input for monitoring to a terminal 186 of the microcomputer 180 and monitored by the microcomputer 180 .
- the EDLC 130 is provided to store power used by the communication module 150 to notify the cloud server 50 when power supply from the outdoor unit 10 to the communication adapter 100 is interrupted.
- the communication module 150 and the microcomputer 180 can be used without limitation when the power supply is interrupted. It is not possible to store as much power as possible. Therefore, the communication adapter 100 imposes restrictions on the operations of the communication module 150 and the microcomputer 180 when the power supply is interrupted. This restriction will be discussed later.
- the DC/DC converter 140 has an input terminal 141 , an output terminal 142 and a terminal 143 .
- DC/DC converter 140 is connected to current limiting circuit 120 , EDLC 130 , communication module 150 and switch circuit 160 . More specifically, the input terminal 141 is connected to the output terminal 122 of the current limiting circuit 120 and the input/output terminal 131 of the EDLC 130, and the output terminal 142 is connected to the power input terminal 151 of the communication module 150 and the switch circuit 160. is connected to the input terminal 162 of the .
- the DC/DC converter 140 is provided to boost the output voltage of the EDLC 130 to the voltage required for the operation of the communication module 150.
- the DC/DC converter 140 is controlled by a control signal input from the terminal 188 of the microcomputer 180 to the terminal 143 . That is, DC/DC converter 140 is controlled by microcomputer 180 .
- Communication module 150 is provided on the output side of DC/DC converter 140 .
- Communication module 150 has power input terminal 151 and communication terminal 152 .
- the power input terminal 151 is connected to the output terminal 142 of the DC/DC converter 140 and receives DC power necessary for the communication module 150 to operate.
- the communication terminal 152 is an I/F (Interface) for communication, is connected to the communication terminal 181 of the microcomputer 180 , and inputs and outputs data to and from the microcomputer 180 . Operation status data is input from the communication terminal 181 of the microcomputer 180 to the communication terminal 152 .
- the communication module 150 communicates with the cloud server 50 via the network 40 by LTE (Long Term Evolution).
- the communication module 150 periodically or irregularly transmits operating status data of the outdoor unit 10 and the plurality of indoor units 20 to the cloud server 50 via the network 40 during normal times when power supply interruption does not occur. .
- the communication module 150 transmits cut-off occurrence data indicating that the power supply is cut off to the cloud server 50 via the network 40 .
- the interruption occurrence data is input from the communication terminal 181 of the microcomputer 180 to the communication terminal 152 .
- Switch circuit 160 is provided between DC/DC converter 110 and LDO 170 and between DC/DC converter 140 and LDO 170 .
- the switch circuit 160 is a three-terminal switch having an input terminal 161 , an input terminal 162 , an output terminal 163 and a control terminal 164 .
- the switch circuit 160 is configured by, for example, two LDOs with a backflow prevention function.
- Input terminal 161 is connected to output terminal 112 of DC/DC converter 110
- input terminal 162 is connected to output terminal 142 of DC/DC converter 140 .
- the output terminal 163 is connected to the input terminal 171 of the LDO 170
- the control terminal 164 is connected to the control terminal 182 of the microcomputer 180 .
- the switch circuit 160 switches the connection destination of the output terminal 163 to either the input terminal 161 or the input terminal 162 based on the control signal input from the microcomputer 180 to the control terminal 164 . Therefore, switch circuit 160 outputs either the output voltage of DC/DC converter 110 or the output voltage of DC/DC converter 140 to LDO 170 .
- Switch circuit 160 may have a timing when both LDOs are turned on. There may be.
- LDO 170 is provided between switch circuit 160 and microcomputer 180 .
- LDO 170 has an input terminal 171 and an output terminal 172 .
- the input terminal 171 is connected to the output terminal 163 of the switch circuit 160 and the output terminal 172 is connected to the power terminal 183 of the microcomputer 180 .
- the LDO 170 lowers the voltage value of the DC power supplied from either the output voltage of the DC/DC converter 140 to the power supply voltage for the microcomputer 180 and outputs it.
- the microcomputer 180 is a control unit that controls the communication adapter 100 as a whole.
- the microcomputer 180 is implemented by a computer including a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), an input/output interface, an internal bus, and the like.
- CPU Central Processing Unit
- RAM Random Access Memory
- ROM Read Only Memory
- the microcomputer 180 has a communication terminal 181, a control terminal 182, a power terminal 183, a control terminal 184, a signal input terminal 185, a terminal 186, a terminal 187, and a terminal 188.
- Communication terminal 181 is connected to communication terminal 152 of communication module 150 .
- Control terminal 182 is connected to control terminal 164 of switch circuit 160 .
- the power terminal 183 is connected to the output terminal 172 of the LDO 170 .
- Control terminal 184 is connected to control terminal 123 of current limiting circuit 120 .
- the signal input terminal 185 is connected to the output terminal 192 of the power supply voltage conversion circuit 190 .
- Terminal 186 is connected to input/output terminal 131 of EDLC 130 .
- the terminal 187 is connected to the terminal 101B, and operating status data is input from the terminal 101B at regular time intervals.
- Terminal 188 is connected to terminal 143 of DC/DC converter 140 and outputs a control signal to DC/DC converter 140 .
- the microcomputer 180 determines whether power is being supplied from the outdoor unit 10 based on the voltage monitoring signal input from the output terminal 192 of the power supply voltage conversion circuit 190 .
- the voltage monitoring signal changes in signal level according to the voltage value of the DC power at the terminal 101A.
- the voltage monitoring signal is at H (High) level when the voltage value of DC power at terminal 101A is greater than a predetermined value, and is at L level when the voltage value of DC power at terminal 101A is less than or equal to a predetermined value.
- the microcomputer 180 detects that the power supply has been interrupted when the voltage monitoring signal becomes L level.
- the microcomputer 180 does not always monitor the voltage monitoring signal, but when the voltage monitoring signal input to the signal input terminal 185 as an interrupt port becomes L level, the power supply is cut off with the highest priority. , a control signal for switching the switch circuit 160 is output.
- the microcomputer 180 normally operates in a normal mode when power supply is not cut off, and periodically or irregularly communicates with the communication module 150 via the network 40 the status of the outdoor unit 10 and the plurality of indoor units 20.
- the operation status data is transmitted to the cloud server 50.
- the microcomputer 180 receives operating status data at fixed time intervals, accumulates the received operating status data for a fixed period of time, compresses the accumulated operating status data, and transmits the compressed operating status data to the communication module 150 .
- the normal mode is an operation mode in which the microcomputer 180 can cause the communication module 150 to periodically or irregularly transmit operating status data to the cloud server 50 without restricting the operation of the microcomputer 180 .
- the microcomputer 180 detects a power supply cutoff, it switches to the power saving mode and causes the communication module 150 to transmit cutoff occurrence data indicating that the power supply cutoff has occurred to the cloud server 50 . In this manner, the microcomputer 180 notifies the cloud server 50 of interruption occurrence data when the power supply is interrupted.
- the microcomputer 180 causes the communication module 150 to transmit data, it transmits commands and data to the communication module 150 via the communication terminal 181 .
- the power saving mode is a mode in which the operation of the microcomputer 180 is restricted to reduce power consumption. Restrictions on the operation of the microcomputer 180 in the power saving mode include, for example, lowering the clock frequency, stopping functions other than communication-related functions, and the like.
- the microcomputer 180 normally outputs a control signal from the control terminal 182 to the control terminal 164 so that the input terminal 161 and the output terminal 163 of the switch circuit 160 are connected.
- the power supplied from the outdoor unit 10 is supplied to the power terminal 183 of the microcomputer 180 via the terminal 101A, the DC/DC converter 110, the input terminal 161 and the output terminal 163 of the switch circuit 160, and the LDO 170. supplied.
- a power supply line from the terminal 101A to the power supply terminal 183 via the DC/DC converter 110, the input terminal 161 and the output terminal 163 of the switch circuit 160, and the LDO 170 is an example of a first power supply line.
- the first power supply line is a power supply line that supplies power to the microcomputer 180 without going through the EDLC 130 .
- the microcomputer 180 detects that the power supply has been interrupted, before switching to the power saving mode, the microcomputer 180 sends a control signal from the control terminal 182 to the control terminal 164 so that the input terminal 162 and the output terminal 163 of the switch circuit 160 are connected. to output
- the power stored in the EDLC 130 is supplied to the power terminal 183 of the microcomputer 180 via the DC/DC converter 140, the input terminal 162 and the output terminal 163 of the switch circuit 160, and the LDO 170.
- a power supply line from the EDLC 130 to the power supply terminal 183 via the DC/DC converter 140, the input terminal 162 and the output terminal 163 of the switch circuit 160, and the LDO 170 is an example of a second power supply line.
- the second power supply line is a power supply line that supplies power from the EDLC 130 to the microcomputer 180 when the power supply is interrupted.
- the switch circuit 160 is switched so that the microcomputer 180 normally receives power from the first power supply line that does not pass through the EDLC 130, and selects the second power supply line that receives power from the EDLC 130 when the power supply is interrupted. is due to the following reasons.
- the microcomputer 180 operates in normal mode, and the communication module 150 periodically or irregularly transmits operating status data to the cloud server 50 .
- the microcomputer 180 when a power supply interruption occurs, the microcomputer 180 operates in power saving mode, and the communication module 150 transmits interruption occurrence data to the cloud server 50 .
- the power consumption of the microcomputer 180 and the communication module 150 when the power supply is interrupted is much smaller than the power consumption of the microcomputer 180 and the communication module 150 during normal times.
- the electric power supplied from the outdoor unit 10 to the terminal 101A is supplied to the EDLC 130 while the current value is limited by the current limiting circuit 120 .
- the power stored in the EDLC 130 is supplied to the communication module 150 both in normal times and when the power supply is interrupted.
- the communication adapter 100 normally supplies power to the microcomputer 180 through the first power supply line that does not pass through the EDLC 130, thereby ensuring early start-up of the microcomputer 180 and normal normal operation. do.
- the power supply from the outdoor unit 10 is interrupted and power cannot be supplied to the microcomputer 180 through the first power supply line. 180 is powered.
- the microcomputer 180 is set to the power saving mode, and the data transmitted from the communication module 150 to the cloud server 50 is limited to interruption occurrence data.
- the communication module 150 does not transmit the operating status data of the outdoor unit 10 and the plurality of indoor units 20 to the cloud server 50 .
- the power consumption of the microcomputer 180 and the communication module 150 is reduced, and the power stored in the EDLC 130 can be used to notify the cloud server 50 that the power supply has been interrupted. .
- power is normally supplied to the microcomputer 180 through the first power supply line that does not pass through the EDLC 130, and the second power supply line is used to supply power from the EDLC 130 to the microcomputer 180 when the power supply is interrupted.
- the switch circuit 160 is switched to select.
- the microcomputer 180 monitors the output voltage value of the EDLC 130, and changes the lower limit value of the voltage value of the EDLC 130 between normal times and when power supply is interrupted. Since the voltage value of EDLC 130 represents the capacity (amount) of charge accumulated by EDLC 130, the lower limit of the voltage value of EDLC 130 is an example of the lower limit of the capacity of the power storage unit.
- FIG. 2 is a diagram for explaining voltage values of the EDLC 130.
- the voltage value of the EDLC 130 as a count value (without units).
- the count value of the maximum voltage value VMAX is 3100
- the first voltage value V1 is 2400
- the second voltage value is 1900
- the minimum voltage value VL is 1800.
- the microcomputer 180 sets the lower limit value of the voltage value of the EDLC 130 to the first voltage value V1 during normal times when the EDLC 130 is receiving power from the outdoor unit 10, and when the power supply from the outdoor unit 10 to the EDLC 130 is cut off , before switching to the power saving mode, the lower limit of the voltage value of the EDLC 130 is set to a second voltage value V2 lower than the first voltage value V1.
- the first voltage value V1 is an example of a first capacitance value
- the second voltage value V2 is an example of a second capacitance value.
- the microcomputer 180 switches to the power saving mode and gives priority to transmitting interruption occurrence data to the cloud server 50 while reducing its own power consumption. After transmitting this data, the microcomputer 180 transitions to a deep sleep mode that consumes less power than the power saving mode.
- the deep sleep mode is a state in which all clocks of the microcomputer 180 are stopped and the microcomputer 180 is not started unless an external start command is received. Note that the microcomputer 180 does not need to transition to the deep sleep mode, for example, when it is okay not to transition to the deep sleep mode. Also, if the microcomputer 180 does not need to be switched to the power saving mode when the power supply is cut off, it is not necessary to switch the microcomputer 180 to the power saving mode when the power supply is cut off.
- the microcomputer 180 and the communication module 150 transition to a state where they stop operating after notifying the cloud server 50 of the interruption of the power supply. After transitioning to the state of stopping the operation, the microcomputer 180 and the communication module 150 enter a state of not consuming the power of the EDLC 130 .
- the second voltage value V2 which is the lower limit of the voltage value of the EDLC 130 when the power supply is interrupted, is set lower than the first voltage value V1, which is the lower limit of the normal time.
- the microcomputer 180 and the communication module 150 are in a state of not consuming the power of the EDLC 130. This is because even if the power of the EDLC 130 is consumed until the voltage reaches the low second voltage value V2, subsequent operations are not affected.
- the second voltage value V2 is a value obtained by adding a predetermined margin to the lowest voltage value VL at which the communication adapter 100 can operate.
- the communication module 150 transmits data to the cloud server 50, there may be cases where communication congestion occurs at the base station or the radio wave condition is not good. Therefore, the communication module 150 cannot always transmit data to the cloud server 50 in one transmission process. Although the details will be described later, when the power supply is interrupted, the microcomputer 180 notifies the cloud server 50 of the interruption of the power supply via the communication module 150 until the voltage value of the EDLC 130 drops to the second voltage value V2. It is possible.
- the difference between the first voltage value V1 and the second voltage value V2 is a voltage value that allows the microcomputer 180 to repeatedly notify the cloud server 50 of the interruption of the power supply using the communication module 150 for a predetermined number of times.
- the predetermined number of times is the number of times the transmission process is repeated until data can be reliably transmitted from the communication module 150 to the cloud server 50 due to the occurrence of communication congestion at the base station, poor radio wave conditions, etc., as described above. For example, it may be determined by experiment or the like.
- the difference between the maximum voltage value VMAX of the EDLC 130 and the first voltage value V1 is set larger than the difference between the first voltage value V1 and the second voltage value V2.
- the maximum voltage value VMAX is an example of the maximum capacitance value, and may be determined according to the capacitance of the EDLC 130 or the like. Normally, power from the EDLC 130 is supplied to the communication module 150 and not supplied to the microcomputer 180 . Power is supplied to the microcomputer 180 from the DC/DC converter 110 on the upstream side of the current limiting circuit 120 through a first power supply path that does not pass through the EDLC 130 .
- the communication module 150 regularly or irregularly transmits the operating status data of the outdoor unit 10 and the plurality of indoor units 20 to the cloud server 50, so more power is required than when the power supply is cut off. and From this point of view, the difference between the maximum voltage value VMAX of the EDLC 130 and the first voltage value V1 is set larger than the difference between the first voltage value V1 and the second voltage value V2.
- the microcomputer 180 detects interruption of power supply, and stops communication of the communication module 150 when the voltage value of the EDLC 130 drops below the second voltage value V2. When the voltage value of the EDLC 130 drops below the second voltage value V2, it approaches the lowest voltage value at which the communication adapter 100 can operate. be.
- the power voltage conversion circuit 190 has an input terminal 191 and an output terminal 192 .
- the input terminal 191 is connected to the terminal 101 A, and the output terminal 192 is connected to the signal input terminal 185 of the microcomputer 180 .
- the power supply voltage conversion circuit 190 is configured by, for example, a reset IC (Integrated Circuit), monitors the voltage value of the DC power at the terminal 101A, and outputs a voltage monitoring signal having a signal level corresponding to the voltage value to the microcomputer 180.
- Power supply voltage conversion circuit 190 outputs an H-level voltage monitoring signal when the voltage value of the DC power at terminal 101A is greater than a predetermined value, and when the voltage value of DC power at terminal 101A is equal to or less than a predetermined value, Outputs an L-level voltage monitoring signal.
- FIG. 3 is a diagram showing an operation example of the communication adapter 100. As shown in FIG. In FIG. 3, the horizontal axis represents time (seconds), and the vertical axis represents the voltage value of the EDLC 130 in count values. The way of representing the voltage value on the vertical axis is the same as in FIG.
- Initial charging starts at time t0.
- the voltage value of EDLC 130 is 0 (zero), and communication adapter 100 is in a non-operating state. Further, at time t0, no interruption of the power supply has occurred.
- Initial charging is started by connecting the terminal 101A to the terminal 11A of the outdoor unit 10 via the power line 12A of the cable 12 and turning on the power of the outdoor unit 10.
- the voltage value of the EDLC 130 sequentially exceeds the minimum voltage value VL and the second voltage value V2 before time t1.
- the power of the communication adapter 100 is turned on, and the microcomputer 180 is turned on.
- the microcomputer 180 turns on the power of the communication module 150 when the voltage value of the EDLC 130 becomes equal to or higher than the minimum voltage value VL.
- the power supply of the communication adapter 100 may be turned on when the voltage value of the EDLC 130 reaches any voltage value between the first voltage value V1 and the maximum voltage value VMAX. This is for shortening the initial startup time.
- the communication module 150 When the voltage value of the EDLC 130 becomes equal to or greater than the first voltage value V1 at time t1, the communication module 150 is turned on and power is supplied from the EDLC 130 to the communication module 150. Therefore, after time t1, the slope (degree) of increase in the voltage value of the EDLC 130 becomes gentle over time.
- power is being supplied to the microcomputer 180 through the first power supply line that does not pass through the EDLC 130 . More specifically, power is supplied to the microcomputer 180 from the DC/DC converter 110 through the switch circuit 160 .
- the microcomputer 180 turns on when the voltage value of the supplied power reaches the voltage value for operation.
- the timing at which the microcomputer 180 is turned on is, for example, before and after time t0, but since the power of the EDLC 130 is not used, the waveforms shown in FIG. 3 hardly change.
- the microcomputer 180 causes the communication module 150 to transmit the operating status data of the outdoor unit 10 and the plurality of indoor units 20 to the cloud server 50 when the voltage value of the EDLC 130 is the maximum voltage value VMAX.
- microcomputer 180 causes communication module 150 to transmit operating status data to cloud server 50 at time t2 when initial charging is completed.
- the communication module 150 starts transmitting operation status data to the cloud server 50, and after time t2, the voltage value of the EDLC 130 starts to drop.
- the communication module 150 repeatedly performs transmission processing for transmitting operation status data to the cloud server 50.
- FIG. Therefore, the voltage value of EDLC 130 continues to decrease after time t2.
- the microcomputer 180 stops the transmission process of the communication module 150. This is because the voltage value of the EDLC 130 has decreased to the first voltage value V1, which is the lower limit value in normal times. Normally, since the communication module 150 relatively frequently transmits the operating status data of the outdoor unit 10 and the plurality of indoor units 20 to the cloud server 50, the first voltage value with sufficient margin for the minimum voltage value VL (1800) Communication is stopped at the voltage value V1 (2400), and the EDLC 130 is recharged to prepare for the next transmission process.
- the communication module 150 may repeat the transmission process multiple times due to communication congestion at the base station, poor radio wave conditions, or the like. Even in such a case, the maximum voltage value VMAX and the first voltage value V1 have a sufficient difference so that the communication module 150 can reliably transmit the operating status data to the cloud server 50. .
- the period from time t2 to t3 is, for example, about 7 seconds to 9 seconds.
- the charge of the EDLC 130 that can be used until the voltage drops from the maximum voltage value VMAX to the first voltage value V1 from time t2 to t3 is Q1(C), which corresponds to the area of the triangle indicated by dots. At times t2-t3, EDLC 130 power corresponding to charge Q1(C) is available.
- the microcomputer 180 stops the transmission process of the communication module 150 at time t3, the power consumption of the EDLC 130 by the communication module 150 is reduced, so recharging of the EDLC 130 is started and the voltage value increases.
- the voltage value of the EDLC 130 increases with substantially the same slope as in the period from time t1 to t2.
- the microcomputer 180 stops the transmission process at that point. After stopping the transmission process, the EDLC 130 is recharged.
- the microcomputer 180 causes the communication module 150 to transmit the operating status data to the cloud server 50 . Therefore, here, as an example, the microcomputer 180 causes the communication module 150 to transmit the operation status data to the cloud server 50 at time t4 when recharging is completed.
- the communication module 150 starts transmitting operation status data to the cloud server 50, and after time t4, the voltage value of the EDLC 130 starts to drop.
- the communication module 150 repeatedly performs transmission processing for transmitting operation status data to the cloud server 50.
- FIG. Therefore, the voltage value of EDLC 130 continues to decrease after time t4.
- the charge of the EDLC 130 that can be used until the voltage drops from the maximum voltage value VMAX to the first voltage value V1 between times t4 and t5 is Q2(C), which corresponds to the area of the triangle indicated by dots. At times t4-t5, EDLC 130 power corresponding to charge Q2(C) is available.
- the charge Q2(C) is equal to the charge Q1(C) at times t2 to t3, as an example.
- the microcomputer 180 stops the transmission process of the communication module 150. This is similar to time t3. After time t5, recharging of EDLC 130 is started and the voltage value increases.
- the microcomputer 180 stops the transmission process at that point. After stopping the transmission process, the EDLC 130 is recharged.
- time t6 the power supply from the outdoor unit 10 is interrupted due to maintenance of the building 30 (see FIG. 1).
- time t6 is just after time t5 as an example, and EDLC 130 is recharged very little after time t5.
- the microcomputer 180 detects that the power supply is interrupted based on the voltage monitoring signal input from the power supply voltage conversion circuit 190.
- the microcomputer 180 When the microcomputer 180 detects the cutoff of the power supply, it lowers the lower limit value of the voltage value of the EDLC 130 to the second voltage value V2, switches the switch circuit 160, switches to the power saving mode, and sends cutoff occurrence data to the communication module 150. It is transmitted to the cloud server 50.
- the microcomputer 180 connects the input terminal 162 and the output terminal 163 of the switch circuit 160 to receive power from the EDLC 130 through the second power supply line. This is because the power supply from the outdoor unit 10 to the terminal 101A is cut off.
- the transmission process may be repeated multiple times due to communication congestion at the base station, poor radio wave conditions, and the like. Also, when starting such a transmission process, the voltage value of the EDLC 130 may be very low, close to the first voltage value V1, like the voltage value at time t6.
- the lower limit of the voltage value of the EDLC 130 is lowered to the second voltage value V2. This ensures that sufficient power is available for transmission processing.
- the communication adapter 100 is set to the first voltage value V1 in order to reliably transmit the interruption occurrence data to the cloud server 50 even if the power supply is interrupted while the voltage value of the EDLC 130 is the first voltage value V1.
- a sufficient voltage difference (500) between V1 (2400) and the second voltage value V2 (1900) is ensured.
- the values of the first voltage value V1 (2400) and the second voltage value V2 (1900) are examples, and the values are not limited to these values.
- the communication module 150 When transmitting the interruption occurrence data to the cloud server 50, the communication module 150 repeats the process of transmitting the interruption occurrence data a predetermined number of times without checking whether the interruption occurrence data has been received by the cloud server 50. . It is necessary to communicate using the power of the EDLC 130 in order to confirm whether or not the signal has been received. This is for the purpose of effectively using the network for data transmission and reliably delivering the interruption occurrence data to the cloud server 50 .
- the predetermined number of times is the number of times necessary to reliably deliver the interruption occurrence data to the cloud server 50 even if the communication congestion of the base station or the poor radio wave condition occurs.
- the voltage difference (500) between the first voltage value V1 (2400) and the second voltage value V2 (1900) is set to a voltage difference with which power is obtained that can repeatedly perform the transmission process for such a predetermined number of times. ing.
- the transmission process is started at time t6 and repeated a predetermined number of times, it takes time until time t7. For this reason, the time t6 to t7 is referred to as the transmission possible time during cutoff.
- the charge of the EDLC 130 that can be used until the voltage drops from the first voltage value V1 to the second voltage value V2 from time t6 to t7 is Q3(C), which corresponds to the area of the trapezoid indicated by dots. At times t6-t7, EDLC 130 power corresponding to charge Q3(C) is available.
- the microcomputer 180 switches to the power saving mode, and the communication module 150 reliably transmits interruption occurrence data to the cloud server 50, but does not transmit operation status data. 150 consumes less power.
- the power amount of the EDLC 130 that can be used by the microcomputer 180 and the communication module 150 when the power supply is cut off is less than the power amount of the EDLC 130 that the communication module 150 can normally use. Sufficient power is secured for the microcomputer 180 and the communication module 150.
- the amount of power of the EDLC 130 that can be used by the microcomputer 180 and the communication module 150 when the power supply is cut off is the amount of power corresponding to the voltage difference (500) between the first voltage value V1 (2400) and the second voltage value (1900). be.
- the amount of power of the EDLC 130 that can be used by the communication module 150 in normal times is the amount of power corresponding to the voltage difference (700) between the minimum voltage value VMAX (3100) and the first voltage value V1 (2400).
- the microcomputer 180 stops the transmission process of the communication module 150. This is because the voltage value of the EDLC 130 has decreased to the second voltage value V2, which is the lower limit value when the power supply is cut off. Further, when the microcomputer 180 stops the transmission process of the communication module 150, it switches to the deep sleep mode. Note that if there is a restriction such as the need to turn off the communication module 150 before the microcomputer 180 switches to the deep sleep mode, the microcomputer 180 waits until the voltage value of the EDLC 130 drops to the second voltage value V2. The communication module 150 should be turned off before the voltage drops to the minimum voltage value VL.
- the microcomputer 180 should switch to the deep sleep mode after turning off the communication module 150 .
- the voltage value of the EDLC 130 drops to the second voltage value V2 at time t7
- the transmission process of the communication module 150 is stopped.
- the slope (degree) of decrease in the voltage value of EDLC 130 is gentler than the slope at times t6 to t7. Therefore, it is possible to secure sufficient time for turning off the communication module 150 .
- Turning off the communication module 150 is to shut down the communication module 150 .
- the communication module 150 After notifying the cloud server 50 when the power supply is interrupted, the communication module 150 does not perform communication processing, the microcomputer 180 enters a deep sleep mode, and enters a state in which it does not start unless it receives a start command from the outside. . In this state, the microcomputer 180 and the communication module 150 are in a state of not consuming the power of the EDLC 130. Therefore, the power of the EDLC 130 is reduced until the second voltage value V2 lower than the first voltage value V1 which is the lower limit value in normal operation is reached. Consumption does not affect subsequent operation of the communications adapter 100 .
- the second voltage value V2 is set to the minimum voltage value VL with a predetermined margin (margin). is set to a level that includes The predetermined margin is, for example, 100 in terms of the count value of the voltage value.
- the period from time t6 to t7 is, for example, about 6 to 8 seconds.
- the microcomputer 180 and the communication module 150 are capable of repeatedly notifying the cloud server 50 of the interruption of the power supply for a predetermined number of times using power corresponding to the voltage difference between the first voltage value V1 and the second voltage value V2. .
- FIG. 4 is a diagram showing a flowchart representing the processing executed by the microcomputer 180. As shown in FIG. The microcomputer 180 executes the following processes.
- the microcomputer 180 When the microcomputer 180 starts processing, it acquires a voltage monitoring signal input from the power supply voltage conversion circuit 190 (step S1). This is to monitor the voltage value of the terminal 101A and determine whether or not the power supply has been interrupted.
- the microcomputer 180 determines whether the voltage value is equal to or less than a predetermined value (step S2).
- the voltage monitoring signal is at H level when the voltage value of the DC power at terminal 101A is greater than the predetermined value, and is at L level when it is less than the predetermined value. It suffices to determine whether or not it is at the L level.
- step S1 the voltage value is not equal to or lower than the predetermined value (S2: NO)
- the flow returns to step S1. This is because the processes of steps S1 and S2 are executed again to monitor whether or not the power supply has been interrupted. If the power supply is not interrupted, the microcomputer 180 repeats the processes of steps S1 and S2.
- step S2 When the microcomputer 180 determines in step S2 that the voltage value is equal to or less than the predetermined value (S2: YES), the microcomputer 180 reduces the lower limit value of the voltage value of the EDLC 130 during communication of the communication module 150 to the second voltage value V2, Output is made from the control terminal 182 so that the input terminal 162 and the output terminal 163 of the switch circuit 160 are connected (step S3).
- the lower limit of the voltage value of the EDLC 130 is lowered from the first voltage value V1 to the second voltage value V2, and the power supply line to the microcomputer 180 is changed from the first power supply line that does not pass through the EDLC 130 to the EDLC 130. It is switched to the second power supply line to pass through.
- communication module 150 can communicate until the voltage value of EDLC 130 decreases to second voltage value V2. Become.
- the microcomputer 180 switches to power saving mode (step S4). This is to reduce its own power consumption so that the communication module 150 can reliably transmit interruption occurrence data to the cloud server 50 .
- the microcomputer 180 causes the communication module 150 to transmit the interruption occurrence data to the cloud server 50 (step S5).
- the microcomputer 180 causes the communication module 150 to repeatedly transmit the interruption occurrence data to the cloud server 50 for a predetermined number of times.
- the predetermined number of times is the number of times that transmission can be repeated with the amount of power corresponding to the voltage difference between the first voltage value V1 and the second voltage value V2.
- the communication module 150 repeatedly transmits the interruption occurrence data to the cloud server 50 for a predetermined number of times, so that the voltage value of the EDLC 130 is reduced by the voltage difference between the first voltage value V1 and the second voltage value V2. .
- step S5 without checking whether the cloud server 50 has received the interruption occurrence data, the communication module 150 repeats the process of transmitting the interruption occurrence data a predetermined number of times. It is necessary to communicate using the power of the EDLC 130 in order to confirm whether or not the signal has been received. This is for the purpose of effectively using the network for data transmission and reliably delivering the interruption occurrence data to the cloud server 50 . It should be noted that when the transmission for the predetermined number of times is completed, the microcomputer 180 advances the flow to step S6.
- the microcomputer 180 stops the transmission process of the communication module 150, turns off the communication module 150, and switches to deep sleep mode (step S6). This is because the transmission of the interruption occurrence data to the cloud server 50 has been completed, so the system waits in the deep sleep mode. A series of processing ends (end).
- the microcomputer 180 reduces the lower limit value of the voltage value of the EDLC 130 during communication of the communication module 150 from the first voltage value V1 to the second voltage value V2.
- the communication adapter 100 capable of notifying the cloud server 50 of cutoff occurrence data representing the occurrence of cutoff of the power supply when the power supply is cut off.
- the cloud server 50 Upon receiving the interruption occurrence data, the cloud server 50 can recognize that the power supply has been interrupted rather than the communication failure, and can efficiently prepare for recovery processing.
- the microcomputer 180 since the microcomputer 180 switches to the power saving mode when the power supply from the outdoor unit 10 is interrupted, the power consumption of the microcomputer 180 can be reduced when the power supply is interrupted.
- the power of the EDLC 130 can be used for repeated transmission processing.
- the microcomputer 180 notifies the cloud server 50 via the communication module 150 that the power supply from the outdoor unit 10 has been interrupted, and enters the power saving mode. It is possible to achieve both notification and reduction of power consumption of the microcomputer 180 .
- the microcomputer 180 detects cutoff of the power supply when the voltage of the electric power supplied from the outdoor unit 10 to the EDLC 130 falls below a predetermined value, it is possible to detect the cutoff of the electric power supply based on the drop in the voltage of the electric power supply. can be easily detected.
- the microcomputer 180 can notify the cloud server 50 of the power supply cutoff via the communication module 150 until the voltage value of the EDLC 130 drops to the second voltage value V2. be. Therefore, when the power supply is interrupted, the notification is made until the voltage drops to the second voltage value V2 that is lower than the first voltage value V1, which is the lower limit value when the EDLC 130 is receiving the power supply from the outdoor unit 10. It is possible to more reliably notify the cloud server 50 that the power supply has been interrupted.
- the microcomputer 180 detects interruption of power supply, and stops communication of the communication module 150 when the voltage value of the EDLC 130 drops below the second voltage value V2. For this reason, notification is possible until the voltage value of the EDLC 130 drops to the second voltage value V2, and it is possible to more reliably notify the cloud server 50 that the power supply has been interrupted. At that time, the communication of the communication module 150 can be stopped.
- the difference between the first voltage value V1 and the second voltage value V2 is the voltage value at which the microcomputer 180 can repeatedly notify the cloud server 50 of the interruption of power supply over a predetermined number of times. Therefore, after the voltage value of the EDLC 130 drops below the first voltage value V1, the microcomputer 180 can repeatedly notify the cloud server 50 of the interruption of the power supply for a predetermined number of times. It is possible to more reliably notify the server 50 that the power supply has been interrupted.
- the difference between the maximum voltage value VMAX of the EDLC 130 and the first voltage value V1 is greater than the difference between the first voltage value V1 and the second voltage value V2.
- the communication module 150 regularly or irregularly transmits the operating status data of the outdoor unit 10 and the plurality of indoor units 20 to the cloud server 50, so more power is required than when the power supply is cut off. Therefore, it is possible to secure a sufficient voltage value of the EDLC 130 that can be used for communication with the cloud server 50 in normal times.
- the lower limit values can be easily managed based on the voltage value of the EDLC 130. It should be noted that the capacity or charge amount of the EDLC 130 may be used instead of the first voltage value V1 and the second voltage value V2.
- the outdoor unit 10 is the outdoor unit 10 of the air conditioner, it is possible to notify the cloud server 50 of the interruption of the power supply when the power supply from the outdoor unit 10 of the air conditioner is interrupted.
- the external device is the outdoor unit 10 of the air conditioner, but the external device may be a device other than the outdoor unit 10 of the air conditioner. It is possible to provide the communication adapter 100 capable of notifying the cloud server 50 of the occurrence of power supply interruption when the power supply is interrupted from an external device other than the outdoor unit 10 of the air conditioner.
- the switch circuit 160 for switching between the first power supply line and the second power supply line is included, the first power supply line and the second power supply line are reliably switched when the power supply from the outdoor unit 10 is stopped. be able to.
- the microcomputer 180 drives the switch circuit 160 based on the voltage of the power supplied from the outdoor unit 10 to switch between the first power supply line and the second power supply line, the voltage of the power supplied from the outdoor unit 10 It is possible to reliably switch between the first power supply line and the second power supply line in response to .
- the microcomputer 180 switches from the first power supply line to the second power supply line, so that the voltage of the power supplied from the outdoor unit 10 becomes equal to or less than the predetermined value.
- the microcomputer 180 switches from the first power supply line to the second power supply line, so that the voltage of the power supplied from the outdoor unit 10 becomes equal to or less than the predetermined value.
- power can be supplied from the EDLC 130 to the microcomputer 180 through the second power supply line.
- the microcomputer 180 since the microcomputer 180 switches to the power saving mode when the voltage of the power supplied from the outdoor unit 10 becomes equal to or less than a predetermined value, the microcomputer 180 can Power consumption can be reduced.
- the microcomputer 180 receives power supply through the first power supply line when receiving power supply from the outdoor unit 10, and receives power supply through the second power supply line when the power supply from the outdoor unit 10 is interrupted. Power is supplied through the power supply line. Therefore, when power supply from the outdoor unit 10 is interrupted, power can be supplied from the EDLC 130 to the microcomputer 180 through the second power supply line.
- the communication module 150 can be made communicable even if the output voltage of the EDLC 130 is low.
- the current limiting circuit 120 is provided upstream of the EDLC 130, and the first power supply line supplies power to the microcomputer 180 from the upstream side of the current limiting circuit 120. In addition, sufficient power can be supplied to the microcomputer 180 through the first power supply line.
- the outdoor unit 10 is the outdoor unit 10 of the air conditioner, it is possible to provide the communication adapter 100 that allows communication even when the power supply from the outdoor unit 10 of the air conditioner is cut off.
- the external device is the outdoor unit 10 of the air conditioner, but the external device may be a device other than the outdoor unit 10 of the air conditioner. It is possible to provide the communication adapter 100 that enables communication even when power supply from an external device other than the outdoor unit 10 of the air conditioner is cut off.
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Abstract
Description
外部装置から電力供給を受けて蓄電する蓄電部と、
前記蓄電部から電力供給を受ける通信部と、
前記通信部を介して外部の管理装置と通信可能な制御部と、
前記外部装置から前記蓄電部を経由せずに前記制御部に電力供給を行う第1電力供給ラインと、
前記蓄電部から前記制御部に電力供給を行う第2電力供給ラインと
を含む、通信アダプタが提供される。
前記第1電力供給ラインと前記第2電力供給ラインとを切り替えるスイッチ回路をさらに含んでもよい。
前記制御部は、前記外部装置からの供給電力の電圧に基づいて前記スイッチ回路を駆動して前記第1電力供給ラインと前記第2電力供給ラインとを切り替えてもよい。
前記制御部は、前記外部装置からの供給電力の電圧が所定値以下になると、前記第1電力供給ラインから前記第2電力供給ラインに切り替えてもよい。
前記制御部は、前記外部装置からの供給電力の電圧が所定値以下になると省電力モードに切り替わってもよい。
前記制御部は、前記外部装置からの電力供給を受けているときは、前記第1電力供給ラインを介して電力供給を受け、前記外部装置からの電力供給が遮断されているときは、前記第2電力供給ラインを介して電力供給を受けてもよい。
前記蓄電部の出力電圧を昇圧して前記通信部に出力する昇圧部をさらに含んでもよい。
前記蓄電部の上流側に設けられる電流制限部をさらに含み、
前記第1電力供給ラインは、前記電流制限部よりも上流側から前記制御部に電力を供給してもよい。
前記外部装置は、空気調和機の室外機であってもよい。
外部装置から電力供給を受けて蓄電する蓄電部と、
前記蓄電部から電力供給を受ける通信部と、
前記通信部を介して外部の管理装置と通信可能な制御部と
を含み、
前記制御部が前記外部の管理装置と通信する際の前記蓄電部の容量の下限値は可変であり、前記蓄電部が前記外部装置から電力供給を受けているときの前記蓄電部の容量の下限値は第1容量値であり、前記外部装置から前記蓄電部への電力供給が遮断されたときの前記蓄電部の容量の下限値は前記第1容量値よりも低い第2容量値である、通信アダプタが提供される。
前記制御部は、前記外部装置からの電力供給が遮断されたときに省電力モードに切り替わってもよい。
前記制御部は、前記外部装置からの電力供給の遮断が発生したことを前記通信部を介して前記外部の管理装置へ通知して、省電力モードになってもよい。
前記制御部は、前記外部装置から前記蓄電部への供給電力の電圧が所定値以下になると前記電力供給の遮断を検知してもよい。
前記制御部は、前記電力供給の遮断を検知すると、前記蓄電部の容量が前記第2容量値に低下するまで前記通信部を介して前記外部の管理装置に前記電力供給の遮断が発生したことを通知可能であってもよい。
前記制御部は、前記電力供給の遮断を検知し、前記蓄電部の容量が前記第2容量値よりも低下すると前記通信部の通信を中止してもよい。
前記第1容量値と前記第2容量値との差は、前記制御部が所定回数にわたって繰り返し前記外部の管理装置に電力供給の遮断の発生を通知可能な容量値であってもよい。
前記蓄電部の最大容量値と前記第1容量値との差は、前記第1容量値と前記第2容量値との差よりも大きくてもよい。
前記第1容量値及び前記第2容量値は、前記蓄電部の電圧値であってもよい。
前記外部装置は、空気調和機の室外機であってもよい。
図1は、通信アダプタ100の構成の一例を示す図である。図1には、通信アダプタ100の他に、室外機10、室内機20、建物30、ネットワーク40、及びクラウドサーバ50を示す。
室外機10は、外部装置の一例であり、空気調和機の室外機である。室外機10は、電力供給用の端子11Aと、データ出力用の端子11Bとを有する。端子11A及び11Bは、コネクタである。端子11Aは、ケーブル12の電源線12Aを介して通信アダプタ100の端子101Aに接続されており、室外機10は、通信アダプタ100に電力を供給する。ケーブル12は、電源用の電源線12Aと、データ通信用の通信線12Bとを含む1本のケーブルである。電源線12Aと通信線12Bとは、一例として実際には2本ずつある。端子11Bは、ケーブル12の通信線12Bを介して通信アダプタ100の端子101Bに接続されるとともに、データケーブルを介して、室外機10の制御部と、複数の室内機20の制御部とに接続されており、室外機10は、室外機10及び複数の室内機20の稼働状況を表す稼働状況データを通信アダプタ100に出力する。端子101A及び100Bは、一例として1つのコネクタに含まれる2つの端子である。なお、電源線12Aと通信線12Bとを含む1本のケーブル12の代わりに、電源線12A用のケーブルと、通信線12B用のケーブルとが別々のケーブルである構成であってもよい。
クラウドサーバ50は、外部の管理装置の一例であり、インターネット等のネットワーク40を通じて、通信アダプタ100の通信モジュール150とデータ通信が可能である。クラウドサーバ50は、1又は複数のコンピュータシステムによって実現され、例えば、室外機10及び複数の室内機20の稼働状況を表す稼働状況データを通信アダプタ100から受信する。また、クラウドサーバ50は、いずれかの室内機20の利用者のスマートフォン等の端末機から、いずれかの室内機20を遠隔的に操作する操作信号を受信し、ネットワーク40を介して通信アダプタ100に送信する。この結果、通信アダプタ100は、受信した操作信号を室外機10に伝送し、操作信号に応じて室外機10及び室内機20が駆動される。なお、クラウドサーバ50は、スマートフォン等の端末機からの室内機20の遠隔的な操作に対応していなくてもよい。
通信アダプタ100は、端子101A、端子101B、筐体102、DC(Direct Current)/DCコンバータ110、電流制限回路120、及びEDLC(Electrical Double Layer Capacitor:電気二重層キャパシタ)130を含む。通信アダプタ100は、さらに、DC/DCコンバータ140、通信モジュール150、スイッチ回路160、LDO(Low Drop Out)170、マイコン(Micro Computer)180、及び電源電圧変換回路190を含む。
通信アダプタ100の通信モジュール150は、定期的又は不定期的に、室外機10及び複数の室内機20の稼働状況データをクラウドサーバ50に送信する。これにより、クラウドサーバ50では、室外機10及び複数の室内機20の稼働状況を把握することができる。
端子101Aは、室外機10から電力供給を受ける端子であり、通信アダプタ100の外部では、ケーブル12の電源線12Aを介して室外機10の端子11Aに接続されている。端子101Aは、例えば、コネクタで実現される端子11Aに接続可能なコネクタである。室外機10から供給される電力は、直流電力であり、一例として電圧値及び電流値が所定値に設定されている。なお、端子101Aは、室外機10以外の外部装置から電力供給を受けてもよい。この場合に、端子101Bには、室外機10以外の外部装置から、室外機10や室内機20の稼働状況を表す稼働状況データが入力されもよい。また、通信アダプタ100は、室外機10以外の外部装置からの電力供給の遮断が発生したときに、ネットワーク40を介して遮断発生データをクラウドサーバ50に送信すればよい。
端子101Bは、室外機10及び複数の室内機20の稼働状況を表す稼働状況データが室外機10から入力されるデータ入力端子であり、通信アダプタ100の外部では、ケーブル12の通信線12Bを介して室外機10の端子11Bに接続されている。端子101Bは、例えば、コネクタで実現される端子11Bに接続可能なコネクタである。端子101Bは、通信アダプタ100の内部では、マイコン180の端子187に接続されており、稼働状況データをマイコン180に伝送する。
筐体102は、一例として、DC/DCコンバータ110、電流制限回路120、EDLC130、DC/DCコンバータ140、通信モジュール150、スイッチ回路160、LDO170、マイコン180、及び電源電圧変換回路190を内蔵する樹脂製等のケースである。筐体102は、通信モジュール150がネットワーク40を介してクラウドサーバ50と通信できるように構成されるとともに、端子101Aを外部に露出させて保持する。通信アダプタ100は、一例として、端子101Aを室外機10の端子11Aにケーブル12の電源線12Aを介して接続し、筐体102を室外機10に固定するだけで、容易に設置可能である。
DC/DCコンバータ110は、入力端子111及び出力端子112を有する。DC/DCコンバータ110は、端子101Aと、電流制限回路120及びスイッチ回路160との間に設けられている。より具体的には、入力端子111は端子101Aに接続され、出力端子112には、電流制限回路120の入力端子121とスイッチ回路160の入力端子161とが接続されている。DC/DCコンバータ110は、端子101Aを介して室外機10から供給される電力の電圧値を昇圧して電流制限回路120及びスイッチ回路160に出力する。
電流制限回路120は、入力端子121、出力端子122、及び制御端子123を有する。電流制限回路120は、DC/DCコンバータ110とEDLC130との間に設けられている。より具体的には、電流制限回路120の入力端子121は、DC/DCコンバータ110の出力端子112に接続されており、電流制限回路120の出力端子122は、EDLC130の入出力端子131と、DC/DCコンバータ140の入力端子141とに接続されている。また、制御端子123は、マイコン180の制御端子184に接続されている。電流制限回路120は、DC/DCコンバータ110からEDLC130に供給される直流電力の電流値を所定値以下に制限して出力する回路である。電流制限回路120が電流値を制限する際の上限値になる所定値は、マイコン180から制御端子184に入力される制御信号によって設定される。なお、所定値は、一例として、第1所定値、又は、第1所定値よりも低い第2所定値のいずれか一方である。第1所定値と第2所定値は、ともに固定値である。マイコン180から入力される制御信号によって、第1所定値と第2所定値のいずれか一方に設定される。
EDLC130は、入出力端子131を有する。EDLC130は、電流制限回路120とDC/DCコンバータ140との間の電力伝送路に接続される入出力端子131さを有する。入出力端子131は電流制限回路120の出力端子122と、DC/DCコンバータ140の入力端子141とに接続されている。また、入出力端子131は、マイコン180の端子186にも接続されている。EDLC130は、電流制限回路120から供給される直流電力を蓄電する。EDLC130の出力電圧は、EDLC130が蓄電する電荷量に比例する。EDLC130の出力電圧は、マイコン180の端子186にも監視用に入力されており、マイコン180によって監視される。
DC/DCコンバータ140は、入力端子141、出力端子142、及び端子143を有する。DC/DCコンバータ140は、電流制限回路120と、EDLC130と、通信モジュール150と、スイッチ回路160と接続されている。より具体的には、入力端子141は、電流制限回路120の出力端子122と、EDLC130の入出力端子131とに接続され、出力端子142は、通信モジュール150の電力入力端子151と、スイッチ回路160の入力端子162とに接続されている。
通信モジュール150は、DC/DCコンバータ140の出力側に設けられている。通信モジュール150は、電力入力端子151と通信端子152とを有する。電力入力端子151は、DC/DCコンバータ140の出力端子142に接続され、通信モジュール150が動作するために必要な直流電力が入力される。通信端子152は、通信用のI/F(Interface)であり、マイコン180の通信端子181に接続され、マイコン180との間でデータの入出力を行う。稼働状況データは、マイコン180の通信端子181から通信端子152に入力される。
スイッチ回路160は、DC/DCコンバータ110とLDO170との間に設けられるとともに、DC/DCコンバータ140とLDO170との間に設けられる。スイッチ回路160は、入力端子161、入力端子162、出力端子163、及び制御端子164を有する三端子スイッチである。スイッチ回路160は、一例として、2つの逆流防止機能付きのLDOによって構成される。入力端子161は、DC/DCコンバータ110の出力端子112に接続され、入力端子162は、DC/DCコンバータ140の出力端子142に接続される。出力端子163は、LDO170の入力端子171に接続され、制御端子164は、マイコン180の制御端子182に接続されている。
LDO170は、スイッチ回路160とマイコン180との間に設けられている。LDO170は、入力端子171と出力端子172とを有する。入力端子171は、スイッチ回路160の出力端子163に接続され、出力端子172は、マイコン180の電源端子183に接続されている。LDO170は、DC/DCコンバータ140の出力電圧とのいずれか一方から供給される直流電力の電圧値をマイコン180用の電源電圧に低下させて出力する。
マイコン180は、通信アダプタ100の全体の制御を行う制御部である。マイコン180は、CPU(Central Processing Unit)、RAM(Random Access Memory)、ROM(Read Only Memory)、入出力インターフェース、及び内部バス等を含むコンピュータによって実現される。
マイコン180は、電力供給の遮断が発生していない通常時には通常モードで動作し、通信モジュール150に、定期的又は不定期的に、ネットワーク40を介して、室外機10及び複数の室内機20の稼働状況データをクラウドサーバ50に送信させる。マイコン180は、一定時間間隔で稼働状況データを受け取り、受け取った稼働状況データを一定時間蓄積し、蓄積した稼働状況データを圧縮して通信モジュール150に伝送する。
マイコン180は、通常時には、スイッチ回路160の入力端子161と出力端子163とが接続するように、制御端子182から制御端子164に制御信号を出力する。この場合には、室外機10から供給される電力は、端子101A、DC/DCコンバータ110、スイッチ回路160の入力端子161及び出力端子163、及びLDO170を経由して、マイコン180の電源端子183に供給される。端子101Aから、DC/DCコンバータ110、スイッチ回路160の入力端子161及び出力端子163、及びLDO170を経由して、電源端子183に至る電力供給ラインは、第1電力供給ラインの一例である。第1電力供給ラインは、EDLC130を経由せずにマイコン180に電力供給を行う電力供給ラインである。
マイコン180は、EDLC130の出力電圧値を監視しており、通常時と、電力供給の遮断時とでは、EDLC130の電圧値の下限値を変えている。EDLC130の電圧値は、EDLC130が蓄積する電荷の容量(量)を表すため、EDLC130の電圧値の下限値は、蓄電部の容量の下限値の一例である。
また、第1電圧値V1と第2電圧値V2との差は、マイコン180が通信モジュール150を利用して所定回数にわたって繰り返しクラウドサーバ50に電力供給の遮断の発生を通知可能な電圧値である。所定回数は、上述のように基地局での通信混雑の発生や、電波状態の不良等によって、通信モジュール150からクラウドサーバ50に確実にデータを送信できるまでに送信処理を繰り返し行う回数であり、例えば実験等で求めて決定すればよい。
また、EDLC130の最大電圧値VMAXと第1電圧値V1との差は、第1電圧値V1と第2電圧値V2との差よりも大きく設定される。最大電圧値VMAXは、最大容量値の一例であり、EDLC130の容量等に応じて決定すればよい。通常時は、EDLC130の電力は、通信モジュール150に供給され、マイコン180には供給されない。マイコン180には、EDLC130を経由しない第1電力供給路によって、電流制限回路120よりも上流側のDC/DCコンバータ110から電力が供給される。通常時には、通信モジュール150は、定期的又は不定期的に、室外機10及び複数の室内機20の稼働状況データをクラウドサーバ50に送信するため、電力供給の遮断時よりも多くの電力を必要とする。このような観点から、EDLC130の最大電圧値VMAXと第1電圧値V1との差を第1電圧値V1と第2電圧値V2との差よりも大きく設定している。
マイコン180は、電力供給の遮断を検知し、EDLC130の電圧値が第2電圧値V2よりも低下すると通信モジュール150の通信を中止する。EDLC130の電圧値が第2電圧値V2よりも低下すると、通信アダプタ100が動作可能な最低電圧値に近づくため、通信モジュール150が通信状態であったとしても、通信を中止することとしたものである。
電源電圧変換回路190は、入力端子191及び出力端子192を有する。入力端子191は、端子101Aに接続されており、出力端子192は、マイコン180の信号入力端子185に接続されている。電源電圧変換回路190は、一例としてリセットIC(Integrated Circuit)で構成され、端子101Aにおける直流電力の電圧値を監視し、電圧値に応じた信号レベルの電圧監視信号をマイコン180に出力する。電源電圧変換回路190は、端子101Aにおける直流電力の電圧値が所定値よりも大きいときは、Hレベルの電圧監視信号を出力し、端子101Aにおける直流電力の電圧値が所定値以下のときは、Lレベルの電圧監視信号を出力する。
図3は、通信アダプタ100の動作例を示す図である。図3において、横軸は時間(秒)を表し、縦軸はEDLC130の電圧値をカウント値で表す。縦軸の電圧値の表し方は、図2と同一である。
図4は、マイコン180が実行する処理を表すフローチャートを示す図である。マイコン180は、以下のような処理を実行する。
110 DC/DCコンバータ
120 電流制限回路
130 EDLC
140 DC/DCコンバータ
150 通信モジュール
160 スイッチ回路
170 LDO
180 マイコン
190 電源電圧変換回路
Claims (9)
- 外部装置から電力供給を受けて蓄電する蓄電部と、
前記蓄電部から電力供給を受ける通信部と、
前記通信部を介して外部の管理装置と通信可能な制御部と、
前記外部装置から前記蓄電部を経由せずに前記制御部に電力供給を行う第1電力供給ラインと、
前記蓄電部から前記制御部に電力供給を行う第2電力供給ラインと
を含む、通信アダプタ。 - 前記第1電力供給ラインと前記第2電力供給ラインとを切り替えるスイッチ回路をさらに含む、請求項1に記載の通信アダプタ。
- 前記制御部は、前記外部装置からの供給電力の電圧に基づいて前記スイッチ回路を駆動して前記第1電力供給ラインと前記第2電力供給ラインとを切り替える、請求項2に記載の通信アダプタ。
- 前記制御部は、前記外部装置からの供給電力の電圧が所定値以下になると、前記第1電力供給ラインから前記第2電力供給ラインに切り替える、請求項1乃至3のいずれか1項に記載の通信アダプタ。
- 前記制御部は、前記外部装置からの供給電力の電圧が所定値以下になると省電力モードに切り替わる、請求項1乃至3のいずれか1項に記載の通信アダプタ。
- 前記制御部は、前記外部装置からの電力供給を受けているときは、前記第1電力供給ラインを介して電力供給を受け、前記外部装置からの電力供給が遮断されているときは、前記第2電力供給ラインを介して電力供給を受ける、請求項1乃至5のいずれか1項に記載の通信アダプタ。
- 前記蓄電部の出力電圧を昇圧して前記通信部に出力する昇圧部をさらに含む、請求項1乃至6のいずれか1項に記載の通信アダプタ。
- 前記蓄電部の上流側に設けられる電流制限部をさらに含み、
前記第1電力供給ラインは、前記電流制限部よりも上流側から前記制御部に電力を供給する、請求項1乃至7のいずれか1項に記載の通信アダプタ。 - 前記外部装置は、空気調和機の室外機である、請求項1乃至8のいずれか1項に記載の通信アダプタ。
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JP2023010422A (ja) | 2023-01-20 |
CN117581483A (zh) | 2024-02-20 |
EP4369612A1 (en) | 2024-05-15 |
JP7244778B2 (ja) | 2023-03-23 |
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