WO2020262051A1 - 空気調和機 - Google Patents
空気調和機 Download PDFInfo
- Publication number
- WO2020262051A1 WO2020262051A1 PCT/JP2020/023301 JP2020023301W WO2020262051A1 WO 2020262051 A1 WO2020262051 A1 WO 2020262051A1 JP 2020023301 W JP2020023301 W JP 2020023301W WO 2020262051 A1 WO2020262051 A1 WO 2020262051A1
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- WIPO (PCT)
- Prior art keywords
- air conditioner
- unit
- power
- active filter
- power supply
- Prior art date
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- 238000005057 refrigeration Methods 0.000 description 2
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- 230000018199 S phase Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
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Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
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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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/70—Regulating power factor; Regulating reactive current or power
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1892—Arrangements for adjusting, eliminating or compensating reactive power in networks the arrangements being an integral part of the load, e.g. a motor, or of its control circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/15—Arrangements for reducing ripples from dc input or output using active elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/26—Power factor control [PFC]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
Definitions
- This disclosure relates to an air conditioner.
- Patent Document 1 discloses an active filter device connected to a power conversion device that receives power supply via a distribution board.
- This active filter device includes a current source, a first detection unit, a second detection unit, and a controller.
- the current source has an output connected to the power receiving path of the power converter and generates a first compensating current for at least one of the reduction of the harmonic current of the power converter and the improvement of the fundamental power factor.
- the first detection unit detects the current flowing in the power receiving path of the power conversion device.
- the second detection unit detects the current flowing in the power receiving path of the distribution board.
- the controller calculates the current for the first compensation based on the detection value detected by the first detection unit, and the harmonic current in the power receiving path of the distribution board based on the detection value detected by the second detection unit.
- the second compensation component for reducing or improving the fundamental wave power factor is calculated, and a current in which the current for the second compensation component and the current for the first compensation component are superimposed is generated in the current source.
- a second detector for detecting the current supplied from the AC power supply is arranged on the power supply side of the distribution board (specifically, between the AC power supply and the distribution board), and the controller is installed. Since it is arranged inside the air conditioner, the distance from the second detector to the controller is long. Therefore, it is difficult to reduce the cost (for example, initial cost) including the cost required for wiring between the second detection unit and the controller and the cost required for manufacturing the second detection unit.
- the first aspect of the present disclosure relates to an air conditioner (10) connected to an AC power source (2).
- the air conditioner (10) is supplied to the adjustment unit (60) for adjusting the apparent power at the power input end of the air conditioner (10) and the AC power supply (2) from the air conditioner (10). It is provided with a control unit (80) that controls the adjustment unit (60) based on information according to a target value of apparent power.
- the adjusting unit (60) is an active filter (61), a phase-advancing capacitor (62a), and the phase-advancing capacitor connected to the AC power supply (2).
- Capacitor switching mechanism (62b) that switches the connection between (62a) and the AC power supply (2), slow-phase reactor (63a), and reactor switching that switches the connection between the slow-phase reactor (63a) and the AC power supply (2).
- An air conditioner characterized by containing at least one of the mechanisms (63b).
- the information according to the target value of the apparent power given from the air conditioner (10) to the AC power source (2) is the air conditioner.
- Information on the operating state of the device (20) connected to the AC power supply (2) together with (10), or the target value of the apparent power given from the air conditioner (10) to the AC power supply (2) is shown. It is an air conditioner characterized by being an apparent power command.
- the information according to the target value of the apparent power given from the air conditioner (10) to the AC power source (2) is the air conditioner.
- Information about the state is input to the input unit (30), and the control unit (80) controls the adjustment unit (60) based on the information input to the input unit (30). It is an air conditioner.
- the AC power supply (2) is controlled by controlling the adjusting unit (60) based on the information on the operating state of the device (20) connected to the AC power supply (2) together with the air conditioner (10). It is possible to control the apparent power supplied from the air conditioner (10) to the AC power source (2) so that the power factor of is close to the target power factor.
- the input unit (30) detects the operating state of the device (20) connected to the AC power supply (2) together with the air conditioner (10).
- the control unit (80) is an air conditioner including a state detection unit (31) that controls the adjustment unit (60) based on the detection result of the state detection unit (31). ..
- the air conditioner (6) is controlled so that the power factor of the AC power source (2) approaches the target power factor by controlling the adjusting unit (60) based on the detection result of the state detecting unit (31).
- the apparent power given to the AC power supply (2) from 10) can be controlled.
- a sixth aspect of the present disclosure is the type and presence / absence of the device (20) in which the input unit (30) is connected to the AC power supply (2) together with the air conditioner (10) in the fourth aspect.
- An air conditioner including a setting unit (32) in which at least one of them is set is included, and the control unit (80) controls the adjustment unit (60) based on the setting of the setting unit (32). It is a machine.
- the air conditioner (10) controls the adjusting unit (60) based on the setting of the setting unit (32) so that the power factor of the AC power source (2) approaches the target power factor. It is possible to control the apparent power given to the AC power supply (2) from.
- a seventh aspect of the present disclosure is that in any one of the first to sixth aspects, the control unit (80) is the air conditioner even when the air conditioner (10) is stopped.
- the air conditioner is characterized in that the adjusting unit (60) is controlled based on information according to a target value of apparent power given to the AC power source (2) from (10).
- the adjusting unit (60) can be controlled even when the air conditioner (10) is stopped.
- the power can be controlled.
- the adjusting unit (60) includes an active filter (61) connected to the AC power supply (2), and the air conditioner (10) is stopped.
- the carrier frequency of the active filter (61) driven therein is lower than the carrier frequency of the active filter (61) driven during the driving of the air conditioner (10). ..
- the carrier frequency of the active filter (61) driven while the air conditioner (10) is stopped is set to be higher than the carrier frequency of the active filter (61) driven while the air conditioner (10) is driven. By lowering the temperature, it is possible to reduce the temperature rise of the active filter (61) that is driven while the air conditioner (10) is stopped.
- a ninth aspect of the present disclosure in the seventh aspect, comprises a cooler (65), the adjusting unit (60) including an active filter (61) connected to the AC power source (2), said.
- the cooler (65) cools the active filter (61), and the control unit (80) cools the active filter (61) when the active filter (61) is driven while the air conditioner (10) is stopped. It is an air conditioner characterized by driving a vessel (65).
- the cooler (65) can be forcibly driven when the active filter (61) is driven while the air conditioner (10) is stopped, so that the air conditioner (10) is stopped. It is possible to reduce the temperature rise of the active filter (61) driven inside.
- the adjusting unit (60) includes an active filter (61) connected to the AC power supply (2).
- the control unit (80) is an air conditioner characterized in that the carrier frequency of the active filter (61) is changed according to the temperature of the components constituting the active filter (61).
- the temperature rise of the active filter (61) can be reduced by changing the carrier frequency of the active filter (61) according to the temperature of the components constituting the active filter (61).
- the active filter (61) includes a reactor (61b) and a switching element (61c), and the control unit (80) is the active filter (80).
- the air conditioner is characterized in that the carrier frequency of the active filter (61) is changed according to the temperature of each of the reactor (61b) and the switching element (61c) included in 61).
- the temperature of the active filter (61) is changed by changing the carrier frequency of the active filter (61) according to the temperature of the reactor (61b) and the switching element (61c) included in the active filter (61). The rise can be reduced.
- the adjusting unit (60) includes an active filter (61) connected to the AC power supply (2).
- the active filter (61) is an air conditioner characterized by being configured by using a wide-gap semiconductor.
- the power loss in the active filter (61) can be reduced by configuring the active filter (61) using a wide-gap semiconductor. As a result, the temperature rise of the active filter (61) can be reduced.
- a thirteenth aspect of the present disclosure is any one of the first to twelfth aspects, wherein the control unit (80) adjusts the adjustment in a period of 14 hours or more including a time zone in which the power factor discount is performed.
- the air conditioner is characterized in that the adjusting unit (60) is controlled so that the unit (60) is continuously driven.
- the power factor discount is performed by controlling the adjusting unit (60) so that the adjusting unit (60) is continuously driven during a period of 14 hours or more including the time zone in which the power factor discount is implemented.
- FIG. 1 is a block diagram illustrating the configuration of the system of the first embodiment.
- FIG. 2 is a diagram illustrating the configuration of an active filter.
- FIG. 3 is a block diagram illustrating the configuration of the control unit.
- FIG. 4 is a block diagram illustrating the configuration of the system of the second embodiment.
- FIG. 5 is a block diagram illustrating the configuration of the system of the third embodiment.
- FIG. 6 is a block diagram illustrating the configuration of the system of the fourth embodiment.
- FIG. 7 is a diagram illustrating the configuration of a phase-advancing capacitor and a switching mechanism.
- FIG. 8 is a diagram illustrating the configuration of the slow phase reactor and the switching mechanism.
- FIG. 9 is a block diagram illustrating the configuration of a modified example of the control unit.
- FIG. 1 illustrates the configuration of the system (1) of the first embodiment.
- This system (1) is a system that receives the power supplied from the AC power supply (2).
- the AC power source (2) is a three-phase AC power source and has an R phase, an S phase, and a T phase.
- the system (1) includes an air conditioner (10), a distribution board (3), a loader (20), and a state detection unit (31).
- this system (1) is installed in a building (not shown) such as a factory, a building, a condominium, or a detached house.
- the distribution board (3) is connected to the AC power supply (2) and a plurality of devices (in this example, the air conditioner (10) and the loader (20)) provided in the system (1). Then, the distribution board (3) receives the electric power supplied from the AC power supply (2) and supplies the electric power to a plurality of devices provided in the system (1). Specifically, the distribution board (3) is provided with a plurality of breakers (not shown), and the power from the AC power supply (2) is connected to the distribution board (3) via the plurality of breakers. It is supplied to each of the multiple devices to be installed. In this example, of the plurality of breakers provided on the distribution board (3), one breaker is connected to the air conditioner (10) and another breaker is connected to the loader (20).
- the loader (20) is a device connected to the AC power supply (2) together with the air conditioner (10).
- the loader (20) is electrically connected to the AC power supply (2) via the distribution board (3) and is supplied from the AC power supply (2) via the distribution board (3). It operates by receiving the generated power.
- Examples of the loader (20) include an elevator, an escalator, a fan, a pump, a ventilation device, a lighting fixture driven by three-phase AC power, and an air conditioner different from the air conditioner (10) installed in the building. Examples include machines (for example, air conditioners that do not have an adjusting device (50) described later).
- the state detection unit (31) detects the operating state of the loader (20) (a device connected to the AC power supply (2) together with the air conditioner (10)). The detection result of the state detection unit (31) is transmitted to the control unit (80) described later.
- the state detection unit (31) is an example of an input unit (30) into which information regarding the operating state of the load device (20) is input.
- the information on the operating state of the loader (20) is an example of information according to the target value of the apparent power given from the air conditioner (10) to the AC power supply (2) (hereinafter referred to as "target apparent power"). Is. This information will be described in detail later.
- the state detection unit (31) detects the operating state of the load device (20) and outputs a detection signal (S1) indicating the detection result. Further, the state detection unit (31) is provided outside the air conditioner (10).
- the air conditioner (10) harmonizes the air-conditioned space (for example, indoor space) in the building.
- the air conditioner (10) is connected to the AC power supply (2).
- the air conditioner (10) is electrically connected to the AC power supply (2) via the distribution board (3), and from the AC power supply (2) via the distribution board (3). It operates by receiving the supplied power.
- the air conditioner (10) includes a refrigerant circuit (not shown), a power conversion device (40), and an adjustment device (50).
- the refrigerant circuit includes a compressor that compresses the refrigerant, a heat exchanger that exchanges heat between the refrigerant and air, and the like, and circulates the refrigerant to perform a refrigeration cycle.
- the compressor is provided with an electric motor that drives the compression mechanism. When electric power is supplied to the electric motor, the electric motor is driven, and when the electric motor is driven, the compressor is driven and the refrigerant circuit performs a refrigeration cycle. As a result, air conditioning is performed.
- the power converter (40) is connected to an AC power source (2).
- the power converter (40) is connected to the distribution board (3) by a power receiving path (P40).
- the power receiving path (P40) is composed of a power cable.
- the power converter (40) is electrically connected to the AC power supply (2) via the power receiving path (P40) and the distribution board (3), and is separated from the AC power supply (2). It operates by receiving the power supplied via the switchboard (3) and the power receiving path (P40).
- the power converter (40) converts the power supplied from the AC power supply (2) into output power having a desired voltage and frequency, and the output power is provided in the compressor of the refrigerant circuit. Supply to the electric motor.
- the power conversion device (40) includes a converter that converts AC power into DC power, an inverter that converts power flow power into AC power by a switching operation, and the like.
- the regulator (50) regulates the apparent power at the power input end of the air conditioner (10).
- the apparent power supplied from the air conditioner (10) to the AC power source (2) is adjusted, and the power factor of the AC power source (2) (hereinafter referred to as "power factor") is adjusted.
- the regulator (50) is incorporated in the air conditioner (10). Then, when the air conditioner (10) is in the driving state, the adjusting device (50) is in the driving state, and when the air conditioner (10) is in the stopped state, the adjusting device (50) is in the stopped state. ..
- the adjusting device (50) includes an adjusting unit (60), a cooler (65), a first current detector (71), a second current detector (72), and a voltage detector. It has (73) and a control unit (80).
- the adjusting unit (60) adjusts the apparent power at the power input end of the air conditioner (10).
- the adjusting unit (60) is connected to the middle part of the power receiving path (P40), which is an example of the power input end of the air conditioner (10), and adjusts the apparent power in the power receiving path (P40).
- the adjustment unit (60) is the active filter (61) shown in FIG.
- the active filter (61) is connected to the AC power supply (2).
- the active filter (61) is connected to the power receiving path (P40) and electrically connected to the AC power supply (2) via the power receiving path (P40) and the distribution board (3). ..
- the active filter (61) improves the power factor. Specifically, the active filter (61) improves the power supply power factor by supplying a compensation current that can compensate for the invalid component of the AC power supply (2) to the power receiving path (P40).
- the active filter (61) improves the power factor and reduces the harmonic current contained in the current (Ir0, Is0, It0) of the AC power supply (2). Specifically, the active filter (61) can compensate for the invalid component of the AC power supply (2), and the waveform of the current (Ir0, Is0, It0) of the AC power supply (2) approaches a sinusoidal wave. As described above, the compensation current, which is the antiphase current of the harmonic current included in the current (Ir0, Is0, It0) of the AC power supply (2), is supplied to the power receiving path (P40).
- the active filter (61) has a low-pass filter (61a), a reactor (61b), a switching element (61c), and an electrolytic capacitor (61d).
- the switching element (61c) is controlled by the control unit (80).
- the cooler (65) cools the active filter (61).
- the cooler (65) is switched between a driving state in which the active filter (61) is cooled and a stopped state in which the active filter (61) is not cooled.
- the operation of the cooler (65) is controlled by the control unit (80).
- the cooler (65) is in the driving state while the air conditioner (10) is being driven, and is in the stopped state while the air conditioner (10) is stopped.
- the cooler (65) is a fan that can be switched between driving and stopping by the control unit (80).
- This fan may be a dedicated fan used exclusively for cooling the active filter (61), or air to other components other than the active filter (61) (eg, heat exchangers in the refrigerant circuit). It may be a transport fan for transport.
- the active filter (61) may be placed in the air transfer path generated by the transfer fan.
- the first current detector (71) detects the current (Ir1, Is1, It1) input to the air conditioner (10).
- the first current detector (71) has a first current sensor (71r) and a second current sensor (71t).
- the first current sensor (71r) and the second current sensor (71t) are the R-phase current (Ir1) and the T-phase of the three-phase currents (Ir1, Is1, It1) input to the air conditioner (10).
- Current (It1) is detected respectively.
- the detection result of the first current detector (71) is transmitted to the control unit (80).
- the first current detector (71) may be a current transformer.
- the second current detector (72) detects the current (Ir1a, Is1a, It1a) input to the regulator (50).
- the second current detector (72) has a third current sensor (72r) and a fourth current sensor (72t).
- the third current sensor (72r) and the fourth current sensor (72t) are of the R-phase current (Ir1a) and the T-phase of the three-phase currents (Ir1a, Is1a, It1a) input to the regulator (50). Detect each current (It1a).
- the detection result of the second current detector (72) is transmitted to the control unit (80).
- the second current detector (72) may be a current transformer.
- the voltage detector (73) detects the power supply voltage (Vrs), which is the voltage of the AC power supply (2). The detection result of the voltage detector (73) is transmitted to the control unit (80).
- the control unit (80) controls the adjustment unit (60) based on the information according to the target apparent power. Specifically, the control unit (80) controls the adjustment unit (60) so that the power supply power factor becomes a predetermined target power factor (for example, 1).
- the control unit (80) is composed of a processor and a memory for storing programs and data for operating the processor.
- the waveform of the current (Ir2, Is2, It2) input to the load device (20) in the operating state of the load device (20) is generally determined for each operating state. Therefore, the waveform of the current (Ir2, Is2, It2) input to the loader (20) can be estimated from the operating state of the loader (20). Further, from the waveform of the current (Ir2, Is2, It2) input to the loader (20), the fluctuation amount of the power supply factor due to the operation of the loader (20) can be estimated.
- the total of the current (Ir1, Is1, It1) input to the air conditioner (10) and the current (Ir2, Is2, It2) input to the loader (20) is from the AC power supply (2). It corresponds to the supplied current (Ir0, Is0, It0).
- the sum of the fluctuation amount of the power factor due to the operation of the air conditioner (10) and the fluctuation amount of the power factor due to the operation of the loader (20) is the power factor of the AC power supply (2). Corresponds to the fluctuation amount of.
- the control unit (80) determines the target apparent power according to the amount of fluctuation in the power factor due to the operation of the loader (20) so that the power factor becomes the target power factor. For example, when the target power factor is "1" and the fluctuation amount of the power power factor due to the operation of the loader (20) is "-0.3 (delay power factor)", the air conditioner (10) The target apparent power is determined so that the fluctuation amount of the power supply power factor due to the operation of is "+0.3 (advance power factor)”. Then, the control unit (80) controls the adjustment unit (60) so that the apparent power supplied from the air conditioner (10) to the AC power source (2) becomes the target apparent power. By controlling the apparent power supplied from the air conditioner (10) to the AC power source (2) in this way, it is possible to control the amount of fluctuation in the power factor due to the operation of the air conditioner (10). , The power factor can be brought closer to the target power factor.
- the control unit (80) estimates the current (Ir2, Is2, It2) input to the loader (20) based on the operating state of the loader (20), and supplies power.
- the current (Ir1a, Is1a,) input to the regulator (50) according to the estimated value of the current (Ir2, Is2, It2) input to the loader (20) so that the power factor becomes the target power factor.
- Determine the target value of It1a) (hereinafter referred to as "target compensation current").
- the target compensation current is an example of the target apparent power.
- the control unit (80) controls the adjustment unit (60) so that the currents (Ir1a, Is1a, It1a) input to the adjustment device (50) become the target compensation current. In this way, by controlling the currents (Ir1a, Is1a, It1a) input to the adjusting device (50), it is possible to control the apparent power supplied from the air conditioner (10) to the AC power supply (2). ..
- the control unit (80) controls the adjustment unit (60) based on the detection result of the state detection unit (31).
- the state detection unit (31) is an example of an input unit (30) into which information regarding the operating state of the load device (20) is input.
- the information regarding the operating state of the loader (20) is information used for deriving the target apparent power, and is an example of information according to the target apparent power.
- the control unit (80) controls the adjustment unit (60) based on the information input to the input unit (30) (information regarding the operating state of the load device (20)).
- control unit (80) is in the driving state when the air conditioner (10) is in the driving state, and is in the stopped state when the air conditioner (10) is in the stopped state.
- control unit (80) includes a phase detection unit (81), a load current estimation unit (82), a first current calculation unit (83), and a second current calculation unit (84). , A subtraction unit (85), a current command calculation unit (86), and a gate pulse generator (87).
- the phase detector (81) inputs the power supply voltage (Vrs) detected by the voltage detector (73) and detects the phase of the power supply voltage (Vrs).
- the load current estimation unit (82) is input to the load device (20) based on the detection result of the state detection unit (31) and the phase of the power supply voltage (Vrs) detected by the phase detection unit (81).
- the current (Ir2, Is2, It2) is estimated, and the estimated current is output as the load current (iL).
- the load current estimation unit (82) uses table data in which the operating state of the load device (20) and the waveform of the current (Ir2, Is2, It2) input to the load device (20) are associated with each other. Has. Then, the load current estimation unit (82) uses the table data to indicate the load device (20) corresponding to the operating state of the load device (20) indicated by the detection signal (S1) output from the state detection unit (31).
- the current value corresponding to the phase of the power supply voltage (Vrs) detected by the phase detection unit (81) is detected from among the current values, and the detected current value is output as the load current (iL).
- the first current calculation unit (83) is the current (Ir1, Is1, It1) input to the air conditioner (10) detected by the first current detector (71) (in this example, the current (Ir1, It1)). ), The phase of the power supply voltage (Vrs) detected by the phase detection unit (81), and the current (Ir1a, Is1a, It1a) input to the loader (20) estimated by the load current estimation unit (82). Based on the above, the first current command value (i1) is generated.
- the first current command value (i1) is a value corresponding to the fluctuation of the power power factor due to the operation of the air conditioner (10) and the loader (20).
- the first current calculation unit (83) combines the output of the first current detector (71) and the output of the load current estimation unit (82), and the combined current obtained by the synthesis is combined with the fundamental wave.
- the harmonic current component is extracted, and the extracted component is output as the first current command value (i1).
- the second current calculation unit (84) is the current (Ir1a, Is1a, It1a) input to the regulator (50) detected by the second current detector (72) (current (Ir1a, It1a) in this example). And the phase of the power supply voltage (Vrs) detected by the phase detection unit (81), the second current command value (i2) is generated.
- the second current command value (i2) is a value corresponding to the fluctuation of the power power factor due to the operation of the adjusting device (50).
- the second current calculation unit (84) extracts the fundamental wave and the harmonic component from the output of the second current detector (72), and the extracted component is used as the second current command value (i2). Is output as.
- the subtraction unit (85) subtracts the second current command value (i2) generated by the second current calculation unit (84) from the first current command value (i1) generated by the first current calculation unit (83). To do.
- the current command calculation unit (86) is a target command value based on the output of the subtraction unit (85) (a command value obtained by subtracting the second current command value (i2) from the first current command value (i1)). Generate (Iref).
- the target command value (Iref) corresponds to the target compensation current (the target value of the currents (Ir1a, Is1a, It1a) input to the adjusting device (50)). Specifically, the current command calculation unit (86) generates a target command value (Iref) indicating a current of the opposite phase of the output of the subtraction unit (85).
- the gate pulse generator (87) has a target command value (Iref) generated by the current command calculation unit (86) and a second current command value (i2) generated by the second current calculation unit (84). Based on this, the switching command value (G) is generated.
- the switching command value (G) is a command value for controlling the operation of the adjusting unit (60). Specifically, the gate pulse generator (87) has a second current command value (i2) and a target command value (Iref) so that the second current command value (i2) becomes the target command value (Iref).
- the switching command value (G) is generated according to the deviation of.
- Patent Document 1 Patent No. 6299831
- the apparatus of Patent Document 1 which is a comparative example of the present disclosure
- the second detection unit is arranged between the AC power supply and the distribution board and the controller is arranged inside the air conditioner, the distance from the second detection unit to the controller. Is getting longer. Therefore, since the wiring between the second detection unit and the controller must be lengthened, it is difficult to reduce the cost (for example, construction cost) required for the wiring between the second detection unit and the controller. Further, since the current capacity of the second detection unit must be increased, it is difficult to reduce the cost required for manufacturing the second detection unit. As described above, it is difficult to reduce the initial cost including the cost required for wiring between the second detection unit and the controller and the cost required for manufacturing the second detection unit.
- the air conditioner (10) of the first embodiment is the air conditioner (10) connected to the AC power supply (2), and the apparent power at the power input end of the air conditioner (10) is applied.
- the cost required for wiring and the cost required for manufacturing the current sensor are higher than those in the case of providing such a current sensor. (For example, initial cost) can be reduced.
- the information according to the target value of the apparent power given from the air conditioner (10) to the AC power source (2) is transmitted to the AC power source (10) together with the air conditioner (10).
- Information on the operating status of the equipment (20) connected to the AC power supply (2) together with the air conditioner (10) is input to the input unit (30).
- the control unit (80) controls the adjustment unit (60) based on the information input to the input unit (30).
- the AC power supply (2) is controlled by controlling the adjusting unit (60) based on the information on the operating state of the device (20) connected to the AC power supply (2) together with the air conditioner (10).
- the apparent power supplied from the air conditioner (10) to the AC power source (2) can be controlled so that the power factor approaches the target power factor (for example, 1).
- the input unit (30) is a state detection unit that detects the operating state of the device (20) connected to the AC power supply (2) together with the air conditioner (10). Including (31).
- the control unit (80) controls the adjustment unit (60) based on the detection result of the state detection unit (31).
- the air is controlled so that the power factor of the AC power source (2) approaches the target power factor (for example, 1) by controlling the adjusting unit (60) based on the detection result of the state detecting unit (31).
- the apparent power supplied from the air conditioner (10) to the AC power supply (2) can be controlled.
- FIG. 4 illustrates the configuration of the system (1) of the second embodiment.
- the operations of the state detection unit (31) and the control unit (80) are different from those of the system (1) of the first embodiment.
- Other configurations of the system (1) of the second embodiment are the same as the configurations of the system (1) of the first embodiment.
- the state detection unit (31) detects the operating state of the load device (20) and the operating state of the air conditioner (10).
- the state detection unit (31) of the second embodiment is an example of an input unit (30) in which information on the operating state of the load device (20) and information on the operating state of the air conditioner (10) are input. is there.
- the state detection unit (31) is a central monitoring device provided in the central monitoring room of a building. This central monitoring device manages the motion state of a plurality of devices installed in the building.
- the state detection unit (31) detects the operating state of the loader (20) and the operating state of the air conditioner (10), and outputs a detection signal (S1) indicating the detection result. Further, the state detection unit (31) is provided outside the air conditioner (10).
- control unit (80) is based on the information according to the target apparent power (the target value of the apparent power given from the air conditioner (10) to the AC power source (2)). To control the adjustment unit (60). Specifically, the control unit (80) controls the adjustment unit (60) so that the power factor (power factor of the AC power supply (2)) becomes the target power factor (for example, 1).
- control unit (80) is configured to operate not only when the air conditioner (10) is in the driving state but also when the air conditioner (10) is in the stopped state.
- control unit (80) controls the adjustment unit (60) based on the information according to the target apparent power even when the air conditioner (10) is stopped.
- control unit (80) controls the adjustment unit (60) based on the detection result of the state detection unit (31) even when the air conditioner (10) is stopped.
- the control unit (80) operates the air conditioner (10) and the loader (20).
- the target apparent power is determined according to the amount of fluctuation in the power factor due to the power factor.
- the control unit (80) changes the power factor due to the operation of the air conditioner (10). Determine the target apparent power according to.
- the control unit (80) adjusts to the fluctuation amount of the power power factor due to the operation of the load device (20). The target apparent power is determined accordingly.
- the air conditioner (10) of the second embodiment can obtain the same effect as the air conditioner (10) of the first embodiment.
- costs such as wiring costs and costs required for manufacturing the current sensor (for example, initial stage) are higher than when such a current sensor is provided. Cost) can be reduced.
- the control unit (80) is supplied from the air conditioner (10) to the AC power source (2) even when the air conditioner (10) is stopped.
- the adjustment unit (60) is controlled based on the information according to the target value of the apparent power.
- the adjusting unit (60) can be controlled even when the air conditioner (10) is stopped.
- the power factor of the AC power supply (2) approaches the target power factor (for example, 1) from the air conditioner (10) to the AC power supply (2). It is possible to control the apparent power given to the air conditioner.
- FIG. 5 illustrates the configuration of the system (1) of the third embodiment.
- the system (1) of the third embodiment includes a setting unit (32) instead of the state detection unit (31) shown in FIG. Further, in the system (1) of the third embodiment, the operation of the control unit (80) is different from that of the system (1) of the first embodiment.
- Other configurations of the system (1) of the third embodiment are the same as those of the system (1) of the first embodiment.
- At least one of the type and presence / absence of the load device (20) is set in the setting unit (32).
- the setting unit (32) has a plurality of switches, and at least one of the type and presence / absence of the load device (20) is set by turning on / off the plurality of switches.
- different loader (20) types are associated with a plurality of switches in the setting unit (32). Then, when one of the plurality of switches of the setting unit (32) is turned from the on state to the off state, the setting unit indicates that the load device (20) of the type assigned to the switch is provided in the system (1). It is set to (32).
- the setting unit (32) when one of the plurality of switches in the setting unit (32) is turned from the off state to the on state, the setting unit indicates that the load device (20) of the type assigned to the switch is not provided in the system (1). It is set to (32).
- the setting unit (32) is a DIP switch (Dual In-line PackageSwitch).
- At least one of the type and presence / absence of the load device (20) is set in the setting unit (32), and the setting signal (S2) indicating the setting of the setting unit (32) is output.
- the setting unit (32) is provided in the adjusting device (50). In other words, the setting unit (32) is incorporated in the air conditioner (10).
- control unit (80) is based on the information according to the target apparent power (the target value of the apparent power given from the air conditioner (10) to the AC power source (2)). To control the adjustment unit (60). Specifically, the control unit (80) controls the adjustment unit (60) so that the power factor (power factor of the AC power supply (2)) becomes the target power factor (for example, 1).
- the fluctuation amount of the power supply factor due to the operation of the loader (20) can be estimated.
- the sum of the fluctuation amount of the power factor due to the operation of the air conditioner (10) and the fluctuation amount of the power factor due to the operation of the loader (20) is the power factor of the AC power supply (2). Corresponds to the fluctuation amount of.
- control unit (80) responds to the fluctuation amount of the power factor due to the operation of the loader (20) so that the power factor becomes the target power factor. , Determine the target apparent power. Then, the control unit (80) controls the adjustment unit (60) so that the apparent power supplied from the air conditioner (10) to the AC power source (2) becomes the target apparent power.
- the control unit (80) receives a current (20) input to the load device (20) based on at least one of the type and presence / absence of the load device (20) provided in the system (1). Ir2, Is2, It2) is estimated, and the target compensation current (Ir2, Is2, It2) is estimated according to the estimated value of the current (Ir2, Is2, It2) input to the loader (20) so that the power factor becomes the target power factor. The target value of the current (Ir1a, Is1a, It1a) input to the adjusting device (50) is determined. Then, the control unit (80) controls the adjustment unit (60) so that the currents (Ir1a, Is1a, It1a) input to the adjustment device (50) become the target compensation current.
- control unit (80) controls the adjustment unit (60) based on the settings of the setting unit (32).
- the setting unit (32) is an example of an input unit (30) in which information on the operating state of the load device (20) is input, and the information on the operating state of the load device (20) is information according to the target apparent power. This is an example.
- the control unit (80) controls the adjustment unit (60) based on the information input to the input unit (30) (information regarding the operating state of the load device (20)).
- the load current estimation unit (82) of the control unit (80) is of the setting of the setting unit (32) and the power supply voltage (Vrs) detected by the phase detection unit (81).
- the current (Ir2, Is2, It2) input to the loader (20) is estimated based on the phase, and the estimated current is output as the load current (iL).
- the load current estimation unit (82) uses the setting unit (32) to set (at least one of the types and presence / absence of the load device (20)) and the current (Ir2, Is2) input to the load device (20). , It2) has table data associated with the waveform.
- the load current estimation unit (82) is a load device (20) corresponding to the setting of the setting unit (32) indicated by the setting signal (S2) output from the setting unit (32) from the table data.
- the waveform of the current (Ir2, Is2, It2) input to is detected, and among the multiple current values constituting the waveform of the current (Ir2, Is2, It2) input to the detected loader (20). Therefore, the current value corresponding to the phase of the power supply voltage (Vrs) detected by the phase detection unit (81) is detected, and the detected current value is output as the load current (iL).
- control unit (80) is configured to operate not only while the air conditioner (10) is being driven but also when the air conditioner (10) is stopped. Specifically, the control unit (80) controls the adjustment unit (60) based on the settings of the setting unit (32) even when the air conditioner (10) is stopped.
- the air conditioner (10) of the third embodiment can obtain the same effect as the air conditioner (10) of the first embodiment.
- costs such as wiring costs and costs required for manufacturing the current sensor (for example, initial stage) are higher than when such a current sensor is provided. Cost) can be reduced.
- the information according to the target value of the apparent power given from the air conditioner (10) to the AC power source (2) is transmitted to the AC power source (10) together with the air conditioner (10).
- Information on the operating status of the equipment (20) connected to the AC power supply (2) together with the air conditioner (10) is input to the input unit (30).
- the input unit (30) includes a setting unit (32) in which at least one of the type and presence / absence of the device (20) connected to the AC power supply (2) together with the air conditioner (10) is set.
- the control unit (80) controls the adjustment unit (60) based on the settings of the setting unit (32).
- the air conditioner is controlled so that the power factor of the AC power source (2) approaches the target power factor (for example, 1) by controlling the adjusting unit (60) based on the setting of the setting unit (32).
- the apparent power supplied from (10) to the AC power supply (2) can be controlled.
- FIG. 6 illustrates the configuration of the system (1) of the fourth embodiment.
- the system (1) of the fourth embodiment includes a distribution board (3), a plurality of (two in this example) air conditioners (10), a loader (20), and a setting unit (32). Be prepared.
- the configuration of the distribution board (3), the loader (20), and the setting unit (32) of the fourth embodiment is the configuration of the distribution board (3), the loader (20), and the setting unit (32) of the third embodiment. Is similar to.
- the configuration of each of the plurality of air conditioners (10) of the fourth embodiment is the same as the configuration of the air conditioner (10) of the third embodiment.
- the setting unit (32) is also used by the plurality of air conditioners (10).
- the setting unit (32) is provided outside the adjusting device (50). In other words, the setting unit (32) is provided outside the air conditioner (10).
- the air conditioner (10) of the fourth embodiment can obtain the same effect as the air conditioner (10) of the third embodiment.
- costs such as wiring costs and costs required for manufacturing the current sensor (for example, initial stage) are higher than when such a current sensor is provided. Cost) can be reduced.
- the setting unit (32) is also used as a plurality of air conditioners (10).
- the settings in each of the plurality of air conditioners (10) are set. Since it can be performed all at once, it is easier to set each of the plurality of air conditioners (10) than when one setting unit (32) is provided for each of the plurality of air conditioners (10). It can be carried out.
- the adjusting unit (60) may be a phase-advancing capacitor (62a) and a capacitor switching mechanism (62b).
- the capacitor switching mechanism (62b) switches the connection between the phase-advancing capacitor (62a) and the AC power supply (2).
- the capacitor switching mechanism (62b) is controlled by the control unit (80).
- the capacitor switching mechanism (62b) is composed of a thyristor.
- the adjusting unit (60) may be a slow phase reactor (63a) and a reactor switching mechanism (63b).
- the reactor switching mechanism (63b) switches the connection between the slow phase reactor (63a) and the AC power supply (2).
- the reactor switching mechanism (63b) is controlled by the control unit (80).
- the reactor switching mechanism (63b) is composed of a thyristor.
- the adjustment unit (60) is an active filter (61), a phase-advancing capacitor (62a), a capacitor switching mechanism (62b) that switches the connection between the phase-advancing capacitor (62a) and the AC power supply (2), and a slow speed. It may include at least one of a phase reactor (63a) and a reactor switching mechanism (63b) that switches the connection between the slow phase reactor (63a) and the AC power supply (2).
- the loader (20) air conditioner (10)
- the information on the operating status of the AC power supply (2) are given as an example, but the information is not limited to this.
- the information according to the target apparent power may be an apparent power command indicating a target value of the apparent power given from the air conditioner (10) to the AC power source (2).
- the information according to the target value of the apparent power given from the air conditioner (10) to the AC power source (2) is the air conditioner (10).
- Information on the operating status of the equipment (20) connected to the AC power supply (2) together with 10), or the apparent power command indicating the target value of the apparent power given to the AC power supply (2) from the air conditioner (10). is there.
- the control unit (80) estimates the amount of fluctuation in the power factor (power factor of the AC power supply (2)) due to the operation of the loader (20) based on the operating state of the loader (20). , The target compensation current (current (Ir1a, Ir1a,) input to the regulator (50) according to the amount of fluctuation of the power factor due to the operation of the loader (20) so that the power factor becomes the target power factor. It may be configured to determine the target value) of Is1a, It1a).
- the control unit (80) may have a load power factor estimation unit (88) instead of the load current estimation unit (82) shown in FIG.
- the load power factor estimation unit (88) estimates the fluctuation amount of the power supply power factor due to the operation of the load device (20) based on the detection result of the state detection unit (31), and calculates the estimated fluctuation amount. Output as load power factor (PL).
- the load power factor estimation unit (88) has table data in which the operating state of the load device (20) and the fluctuation amount of the power supply power factor due to the operation of the load device (20) are associated with each other. ..
- the load power factor estimation unit (88) is a load device corresponding to the operating state of the load device (20) indicated in the detection signal (S1) output from the state detection unit (31) from the table data.
- the fluctuation amount of the power supply power factor due to the operation of (20) is detected, and the detected fluctuation amount is output as the load power factor (PL).
- the load power factor estimation unit (88) fluctuates the power power factor due to the operation of the loader (20) based on the settings of the setting unit (32). It may be configured to estimate the amount and output the estimated fluctuation amount as a load power factor (PL). Specifically, the load power factor estimation unit (88) uses the power factor of the power factor due to the setting of the setting unit (32) (at least one of the type and presence / absence of the load device (20)) and the operation of the load power factor (20). It may have table data associated with the fluctuation amount of.
- the load power factor estimation unit (88) is a load device (20) corresponding to the setting of the setting unit (32) indicated in the detection signal (S1) output from the setting unit (32) from the table data.
- the fluctuation amount of the power supply power factor due to the operation of) may be detected, and the detected fluctuation amount may be output as the load power factor (PL).
- the carrier frequency of the active filter (61) driven while the air conditioner (10) is stopped is higher than the carrier frequency of the active filter (61) driven while the air conditioner (10) is being driven. May be low.
- the carrier frequency of the active filter (61) is set to a predetermined first frequency. Controls the operation of the active filter (61).
- the control unit (80) drives the active filter (61) while the air conditioner (10) is stopped, the carrier frequency of the active filter (61) is set to a predetermined second frequency. Controls the operation of the active filter (61).
- the second frequency is a frequency lower than the first frequency.
- the carrier frequency of the active filter (61) that is driven while the air conditioner (10) is stopped is the drive of the air conditioner (10). It is lower than the carrier frequency of the active filter (61) driven in.
- the carrier frequency of the active filter (61) driven while the air conditioner (10) is stopped is changed to the carrier frequency of the active filter (61) driven while the air conditioner (10) is driven.
- the temperature rise of the active filter (61) driven while the air conditioner (10) is stopped can be reduced.
- the continuous drive time of the active filter (61) can be lengthened.
- the active filter (61) may be provided with a temperature sensor (not shown) for detecting the temperature of the components constituting the active filter (61). The detection result of this temperature sensor is transmitted to the control unit (80). Then, the control unit (80) may change the carrier frequency of the active filter (61) according to the temperature of the component constituting the active filter (61).
- the component of the active filter (61) subject to temperature control is a component whose temperature tends to decrease as the carrier frequency of the active filter (61) increases (for example, a reactor (61b))
- control is performed.
- the unit (80) increases the carrier frequency of the active filter (61), and the temperature of the component falls below the predetermined second temperature.
- the second temperature is set to a temperature equal to or lower than the first temperature.
- the component of the active filter (61) subject to temperature control is a component whose temperature tends to rise as the carrier frequency of the active filter (61) increases (for example, a switching element (61c)).
- the control unit (80) reduces the carrier frequency of the active filter (61), and the temperature of the component becomes the predetermined second temperature. Below this, the carrier frequency of the active filter (61) is increased.
- the second temperature is set to, for example, a temperature equal to or lower than the first temperature.
- the control unit (80) has the carrier frequency of the active filter (61) according to the temperature of the components constituting the active filter (61). To change.
- the temperature rise of the active filter (61) can be reduced by changing the carrier frequency of the active filter (61) according to the temperature of the components constituting the active filter (61). ..
- the continuous drive time of the active filter (61) can be lengthened.
- the active filter (61) is provided with a temperature sensor (not shown) that detects the temperature of each of the reactor (61b) and the switching element (61c) included in the active filter (61). You may. The detection result of this temperature sensor is transmitted to the control unit (80). Then, the control unit (80) may change the carrier frequency of the active filter (61) according to the respective temperatures of the reactor (61b) and the switching element (61c) included in the active filter (61).
- the control unit (80) increases the carrier frequency of the active filter (61) when the temperature of the reactor (61b) of the active filter (61) exceeds a predetermined first determination temperature, and the active filter (61) increases the carrier frequency.
- the first determination temperature is, for example, a temperature obtained by adding the temperature of the switching element (61c) or the temperature of the switching element (61c) to a predetermined first correction temperature (temperature higher than zero). Is set to.
- the second determination temperature is set to, for example, the temperature of the reactor (61b) or the temperature obtained by adding a predetermined second correction temperature (temperature higher than zero) to the temperature of the reactor (61b). ..
- control unit (80) is set to the respective temperatures of the reactor (61b) and the switching element (61c) included in the active filter (61).
- the carrier frequency of the active filter (61) is changed accordingly.
- the active filter (61) is modified by changing the carrier frequency of the active filter (61) according to the temperature of the reactor (61b) and the switching element (61c) included in the active filter (61). It is possible to reduce the temperature rise of. As a result, the continuous drive time of the active filter (61) can be lengthened.
- control unit (80) may drive the cooler (65) when the active filter (61) is driven while the air conditioner (10) is stopped.
- control unit (80) cannot sufficiently reduce the temperature rise of the active filter (61) due to the change of the carrier frequency of the active filter (61) described above while the air conditioner (10) is stopped. To drive the cooler (65).
- control unit (80) is a cooler when the active filter (61) is driven while the air conditioner (10) is stopped. Drive (65).
- the cooler (65) can be forcibly driven when the active filter (61) is driven while the air conditioner (10) is stopped, so that the air conditioner (10) can be driven. It is possible to reduce the temperature rise of the active filter (61) that is driven while the air conditioner is stopped. As a result, the continuous drive time of the active filter (61) can be lengthened.
- the active filter (61) may be configured by using a wide gap semiconductor.
- the switching element included in the active filter (61) may be configured by using any of silicon carbide, gallium oxide, and diamond, which are examples of wide-gap semiconductors.
- the active filter (61) is configured by using a wide-gap semiconductor.
- the power loss in the active filter (61) can be reduced by configuring the active filter (61) using the wide gap semiconductor. As a result, the temperature rise of the active filter (61) can be reduced, and the continuous driving time of the active filter (61) can be lengthened.
- control unit (80) has a continuous adjustment unit (60) for a period of 14 hours or more including a time zone in which the power factor discount is implemented (for example, a time zone from 8:00 to 22:00).
- the adjusting unit (60) may be controlled so as to drive the vehicle.
- the control unit (80) has the adjusting unit (60) in a period of 14 hours or more including the time zone in which the power factor discount is implemented.
- the adjustment unit (60) is controlled so as to be driven continuously.
- the force is controlled by controlling the adjusting unit (60) so that the adjusting unit (60) is continuously driven during a period of 14 hours or more including the time zone in which the power factor discount is implemented.
- the apparent power given to the can be controlled.
- the data (or signal) transmission / reception method performed in the system (1) may be a wired method or a wireless method.
- data transmission / reception between various sensors for example, the first current detector (71), the second current detector (72), etc.
- the control unit (80) the input unit (30) (state detection).
- the transmission / reception of a signal between the unit (31) or the setting unit (32)) and the control unit (80) may be a wired system or a wireless system.
- the adjusting device (50) is incorporated in the air conditioner (10) is taken as an example, but the present invention is not limited to this.
- the adjusting device (50) may be provided outside the air conditioner (10), or may be incorporated in another device (for example, a loader (20)) different from the air conditioner (10). You may.
- the adjusting unit (60) and the control unit (80) may be incorporated in the air conditioner (10) or may be provided outside the air conditioner (10). It may be incorporated in another device (for example, a loader (20)) different from the air conditioner (10).
- the state detection unit (31) is provided outside the air conditioner (10) as an example, but the present invention is not limited to this.
- the state detector (31) may be incorporated in the air conditioner (10), or may be incorporated in another device (for example, a loader (20)) different from the air conditioner (10). May be good.
- the case where the setting unit (32) is incorporated in the air conditioner (10) and the case where the setting unit (32) is provided outside the air conditioner (10) are given as examples. , Not limited to this.
- the setting unit (32) may be incorporated in another device (for example, a load device (20)) different from the air conditioner (10).
- this disclosure is useful as an air conditioner.
- System 2 AC power supply 3 Distribution board 10 Air conditioner 20 Load device (equipment connected to AC power supply) 30 Input unit 31 State detection unit 32 Setting unit 40 Power conversion device 50 Adjustment device 60 Adjustment unit 65 Cooler 80 Control unit
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Abstract
Description
図1は、実施形態1のシステム(1)の構成を例示する。このシステム(1)は、交流電源(2)から供給された電力を受けるシステムである。この例では、交流電源(2)は、三相交流電源であり、R相とS相とT相とを有する。また、システム(1)は、空気調和機(10)と、分電盤(3)と、負荷器(20)と、状態検出部(31)とを備える。例えば、このシステム(1)は、工場、ビル、マンション、戸建て住宅などの建物(図示を省略)内に設けられる。
分電盤(3)は、交流電源(2)と、システム(1)に設けられる複数の機器(この例では空気調和機(10)と負荷器(20))とに接続される。そして、分電盤(3)は、交流電源(2)から供給された電力を受け、その電力をシステム(1)に設けられる複数の機器に供給する。具体的には、分電盤(3)には、複数のブレーカ(図示を省略)が設けられ、交流電源(2)からの電力が複数のブレーカを経由して分電盤(3)に接続される複数の機器にそれぞれ供給される。この例では、分電盤(3)に設けられた複数のブレーカのうち、1つのブレーカが空気調和機(10)に接続され、別の1つのブレーカが負荷器(20)に接続される。
負荷器(20)は、空気調和機(10)とともに交流電源(2)に接続される機器である。この例では、負荷器(20)は、分電盤(3)を経由して交流電源(2)と電気的に接続され、交流電源(2)から分電盤(3)を経由して供給された電力を受けて動作する。なお、負荷器(20)の例としては、建物に設けられたエレベータ,エスカレータ,ファン,ポンプ,換気装置,三相交流電力で駆動する照明器具,空気調和機(10)とは別の空気調和機(例えば後述する調整装置(50)を有さない空気調和機)などが挙げられる。
状態検出部(31)は、負荷器(20)(空気調和機(10)とともに交流電源(2)に接続される機器)の運転状態を検出する。状態検出部(31)の検出結果は、後述する制御部(80)に送信される。状態検出部(31)は、負荷器(20)の運転状態に関する情報が入力される入力部(30)の一例である。なお、負荷器(20)の運転状態に関する情報は、空気調和機(10)から交流電源(2)に与えられる皮相電力の目標値(以下「目標皮相電力」と記載)に応じた情報の一例である。これらの情報については、後で詳しく説明する。
空気調和機(10)は、建物内の空調対象空間(例えば室内空間)の空気調和を行う。空気調和機(10)は、交流電源(2)に接続される。この例では、空気調和機(10)は、分電盤(3)を経由して交流電源(2)と電気的に接続され、交流電源(2)から分電盤(3)を経由して供給された電力を受けて動作する。具体的には、空気調和機(10)は、冷媒回路(図示を省略)と、電力変換装置(40)と、調整装置(50)とを備える。
冷媒回路は、冷媒を圧縮する圧縮機や、冷媒と空気とを熱交換させる熱交換器などを有し、冷媒を循環させて冷凍サイクルを行う。圧縮機には、圧縮機構を駆動させる電動機が設けられる。電動機に電力が供給されると、電動機が駆動し、電動機が駆動すると、圧縮機が駆動して冷媒回路が冷凍サイクルを行う。これにより、空気調和が行われる。
電力変換装置(40)は、交流電源(2)に接続される。この例では、電力変換装置(40)は、受電経路(P40)により分電盤(3)と接続される。例えば、受電経路(P40)は、電力ケーブルにより構成される。このような構成により、電力変換装置(40)は、受電経路(P40)と分電盤(3)とを経由して交流電源(2)と電気的に接続され、交流電源(2)から分電盤(3)と受電経路(P40)とを経由して供給された電力を受けて動作する。具体的には、電力変換装置(40)は、交流電源(2)から供給された電力を所望の電圧および周波数を有する出力電力に変換し、その出力電力を冷媒回路の圧縮機に設けられた電動機に供給する。例えば、電力変換装置(40)は、交流電力を直流電力に変換するコンバータや、スイッチング動作により力流電力を交流電力に変換するインバータなどを有する。
調整装置(50)は、空気調和機(10)の電源入力端における皮相電力を調整する。これにより、空気調和機(10)から交流電源(2)に与えられる皮相電力が調整され、交流電源(2)の力率(以下「電源力率」と記載)が調整される。この例では、調整装置(50)は、空気調和機(10)に組み込まれている。そして、空気調和機(10)が駆動状態である場合に、調整装置(50)が駆動状態となり、空気調和機(10)が停止状態である場合に、調整装置(50)が停止状態となる。また、この例では、調整装置(50)は、調整部(60)と、冷却器(65)と、第1電流検出器(71)と、第2電流検出器(72)と、電圧検出器(73)と、制御部(80)とを有する。
調整部(60)は、空気調和機(10)の電源入力端における皮相電力を調整する。この例では、調整部(60)は、空気調和機(10)の電源入力端の一例である受電経路(P40)の中途部に接続され、受電経路(P40)における皮相電力を調整する。
冷却器(65)は、アクティブフィルタ(61)を冷却する。冷却器(65)は、アクティブフィルタ(61)の冷却を行う駆動状態と、アクティブフィルタ(61)の冷却を行わない停止状態とに切り換えられる。そして、冷却器(65)の動作は、制御部(80)により制御される。この例では、冷却器(65)は、空気調和機(10)の駆動中に駆動状態となり、空気調和機(10)の停止中に停止状態となる。例えば、冷却器(65)は、制御部(80)により駆動と停止を切り換え可能なファンである。このファンは、アクティブフィルタ(61)の冷却のために専ら使用される専用ファンであってもよいし、アクティブフィルタ(61)ではない他の構成部品(例えば冷媒回路の熱交換器)に空気を搬送する搬送ファンであってもよい。例えば、アクティブフィルタ(61)は、搬送ファンにより生成される空気の搬送経路に配置されてもよい。
第1電流検出器(71)は、空気調和機(10)に入力される電流(Ir1,Is1,It1)を検出する。この例では、第1電流検出器(71)は、第1電流センサ(71r)と、第2電流センサ(71t)とを有する。第1電流センサ(71r)と第2電流センサ(71t)は、空気調和機(10)に入力される三相の電流(Ir1,Is1,It1)のうちR相の電流(Ir1)とT相の電流(It1)をそれぞれ検出する。第1電流検出器(71)の検出結果は、制御部(80)に送信される。例えば、第1電流検出器(71)は、カレントトランスであってもよい。
第2電流検出器(72)は、調整装置(50)に入力される電流(Ir1a,Is1a,It1a)を検出する。この例では、第2電流検出器(72)は、第3電流センサ(72r)と、第4電流センサ(72t)とを有する。第3電流センサ(72r)と第4電流センサ(72t)は、調整装置(50)に入力される三相の電流(Ir1a,Is1a,It1a)のうちR相の電流(Ir1a)とT相の電流(It1a)をそれぞれ検出する。第2電流検出器(72)の検出結果は、制御部(80)に送信される。例えば、第2電流検出器(72)は、カレントトランスであってもよい。
電圧検出器(73)は、交流電源(2)の電圧である電源電圧(Vrs)を検出する。電圧検出器(73)の検出結果は、制御部(80)に送信される。
制御部(80)は、目標皮相電力に応じた情報に基づいて、調整部(60)を制御する。具体的には、制御部(80)は、電源力率が予め定められた目標力率(例えば1)となるように、調整部(60)を制御する。例えば、制御部(80)は、プロセッサと、プロセッサを動作させるためのプログラムやデータを記憶するメモリとにより構成される。
ここで、負荷器(20)の運転状態と電源力率との関係について説明する。負荷器(20)の運転状態毎に、その運転状態において負荷器(20)に入力される電流(Ir2,Is2,It2)の波形が概ね決まっている。したがって、負荷器(20)の運転状態から、負荷器(20)に入力される電流(Ir2,Is2,It2)の波形を推定することができる。また、負荷器(20)に入力される電流(Ir2,Is2,It2)の波形から、負荷器(20)の動作に起因する電源力率の変動量を推定することができる。
この例では、制御部(80)は、電源力率が目標力率となるように、負荷器(20)の動作に起因する電源力率の変動量に応じて、目標皮相電力を決定する。例えば、目標力率が“1”であり、負荷器(20)の動作に起因する電源力率の変動量が“-0.3(遅れ力率)”である場合、空気調和機(10)の動作に起因する電源力率の変動量が“+0.3(進み力率)”となるように目標皮相電力が決定される。そして、制御部(80)は、空気調和機(10)から交流電源(2)に与えられる皮相電力が目標皮相電力となるように、調整部(60)を制御する。このように、空気調和機(10)から交流電源(2)に与えられる皮相電力を制御することにより、空気調和機(10)の動作に起因する電源力率の変動量を制御することができ、電源力率を目標力率に近づけることができる。
図3に示すように、制御部(80)は、位相検出部(81)と、負荷電流推定部(82)と、第1電流演算部(83)と、第2電流演算部(84)と、減算部(85)と、電流指令演算部(86)と、ゲートパルス発生器(87)とを有する。
次に、本開示の比較例である特許文献1(特許第6299831号)の装置について説明する。特許文献1の装置では、第2検出部が交流電源と分電盤との間に配置され、制御器が空気調和機の内部に配置されているので、第2検出部から制御器までの距離が長くなっている。そのため、第2検出部と制御器との配線を長くしなければならないので、第2検出部と制御器との配線に要する費用(例えば工事費用)を削減することが困難である。また、第2検出部の電流容量を大きくしなければならないので、第2検出部の製造に要する費用を削減することが困難である。このように、第2検出部と制御器との配線に要する費用や第2検出部の製造に要する費用などを含む初期費用を削減することが困難である。
以上のように、実施形態1の空気調和機(10)は、交流電源(2)に接続される空気調和機(10)であって、空気調和機(10)の電源入力端における皮相電力を調整する調整部(60)と、空気調和機(10)から交流電源(2)に与えられる皮相電力の目標値に応じた情報に基づいて調整部(60)を制御する制御部(80)とを備える。
また、実施形態1の空気調和機(10)では、空気調和機(10)から交流電源(2)に与えられる皮相電力の目標値に応じた情報は、空気調和機(10)とともに交流電源(2)に接続される機器(20)の運転状態に関する情報である。空気調和機(10)とともに交流電源(2)に接続される機器(20)の運転状態に関する情報は、入力部(30)に入力される。制御部(80)は、入力部(30)に入力される情報に基づいて調整部(60)を制御する。
また、実施形態1の空気調和機(10)では、入力部(30)は、空気調和機(10)とともに交流電源(2)に接続される機器(20)の運転状態を検出する状態検出部(31)を含む。制御部(80)は、状態検出部(31)の検出結果に基づいて調整部(60)を制御する。
図4は、実施形態2のシステム(1)の構成を例示する。この実施形態2のシステム(1)は、状態検出部(31)と制御部(80)の動作が実施形態1のシステム(1)と異なる。実施形態2のシステム(1)のその他の構成は、実施形態1のシステム(1)の構成と同様である。
実施形態2では、状態検出部(31)は、負荷器(20)の運転状態と空気調和機(10)の運転状態とを検出する。言い換えると、実施形態2の状態検出部(31)は、負荷器(20)の運転状態に関する情報と空気調和機(10)の運転状態に関する情報とが入力される入力部(30)の一例である。例えば、状態検出部(31)は、ビルの中央監視室に設けられる中央監視装置である。この中央監視装置は、ビルに設けられた複数の機器の運動状態を管理する。
実施形態1と同様に、実施形態2において、制御部(80)は、目標皮相電力(空気調和機(10)から交流電源(2)に与えられる皮相電力の目標値)に応じた情報に基づいて、調整部(60)を制御する。具体的には、制御部(80)は、電源力率(交流電源(2)の力率)が目標力率(例えば1)となるように、調整部(60)を制御する。
以上のように、実施形態2の空気調和機(10)では、実施形態1の空気調和機(10)と同様の効果を得ることができる。例えば、分電盤(3)の電源側に電流センサを設ける必要がないので、このような電流センサを設ける場合よりも、配線に要する費用や電流センサの製造に要する費用などの費用(例えば初期費用)を低減することができる。
また、実施形態2の空気調和機(10)では、制御部(80)は、空気調和機(10)の停止中であっても、空気調和機(10)から交流電源(2)に与えられる皮相電力の目標値に応じた情報に基づいて調整部(60)を制御する。
図5は、実施形態3のシステム(1)の構成を例示する。この実施形態3のシステム(1)は、図1に示した状態検出部(31)に代えて、設定部(32)を備える。また、実施形態3のシステム(1)は、制御部(80)の動作が実施形態1のシステム(1)と異なる。実施形態3のシステム(1)のその他の構成は、実施形態1のシステム(1)と同様である。
設定部(32)は、負荷器(20)の種類および有無のうち少なくとも一方が設定される。具体的には、設定部(32)は、複数のスイッチを有し、これらの複数のスイッチのオンオフにより負荷器(20)の種類および有無のうち少なくとも一方が設定される。例えば、設定部(32)の複数のスイッチに対してそれぞれ異なる負荷器(20)の種類が対応付けられる。そして、設定部(32)の複数のスイッチの1つをオン状態からオフ状態にすると、そのスイッチに割り当てられた種類の負荷器(20)がシステム(1)に設けられていることが設定部(32)に設定される。一方、設定部(32)の複数のスイッチの1つをオフ状態からオン状態にすると、そのスイッチに割り当てられた種類の負荷器(20)がシステム(1)に設けられていないことが設定部(32)に設定される。例えば、設定部(32)は、ディップスイッチ(Dual In-line PackageSwitch)である。
実施形態1と同様に、実施形態3において、制御部(80)は、目標皮相電力(空気調和機(10)から交流電源(2)に与えられる皮相電力の目標値)に応じた情報に基づいて、調整部(60)を制御する。具体的には、制御部(80)は、電源力率(交流電源(2)の力率)が目標力率(例えば1)となるように、調整部(60)を制御する。
ここで、負荷器(20)の種類および有無と電源力率との関係について説明する。特定の負荷器(20)(例えばエレベータ)では、その負荷器(20)が駆動する時間帯と駆動中の負荷器(20)に入力される電流(Ir2,Is2,It2)の波形とが概ね決まっている。したがって、システム(1)に設けられる負荷器(20)の種類および有無の少なくとも一方から、負荷器(20)に入力される電流(Ir2,Is2,It2)の波形を推定することができる。また、負荷器(20)に入力される電流(Ir2,Is2,It2)の波形から、負荷器(20)の動作に起因する電源力率の変動量を推定することができる。そして、空気調和機(10)の動作に起因する電源力率の変動量と、負荷器(20)の動作に起因する電源力率の変動量との合計は、交流電源(2)の力率の変動量に相当する。
実施形態3では、実施形態1と同様に、制御部(80)は、電源力率が目標力率となるように、負荷器(20)の動作に起因する電源力率の変動量に応じて、目標皮相電力を決定する。そして、制御部(80)は、空気調和機(10)から交流電源(2)に与えられる皮相電力が目標皮相電力となるように、調整部(60)を制御する。
以上のように、実施形態3の空気調和機(10)では、実施形態1の空気調和機(10)と同様の効果を得ることができる。例えば、分電盤(3)の電源側に電流センサを設ける必要がないので、このような電流センサを設ける場合よりも、配線に要する費用や電流センサの製造に要する費用などの費用(例えば初期費用)を低減することができる。
また、実施形態3の空気調和機(10)では、空気調和機(10)から交流電源(2)に与えられる皮相電力の目標値に応じた情報は、空気調和機(10)とともに交流電源(2)に接続される機器(20)の運転状態に関する情報である。空気調和機(10)とともに交流電源(2)に接続される機器(20)の運転状態に関する情報は、入力部(30)に入力される。入力部(30)は、空気調和機(10)とともに交流電源(2)に接続される機器(20)の種類および有無のうち少なくとも一方が設定される設定部(32)を含む。制御部(80)は、設定部(32)の設定に基づいて調整部(60)を制御する。
図6は、実施形態4のシステム(1)の構成を例示する。この実施形態4のシステム(1)は、分電盤(3)と、複数(この例では2つ)の空気調和機(10)と、負荷器(20)と、設定部(32)とを備える。実施形態4の分電盤(3)と負荷器(20)と設定部(32)の構成は、実施形態3の分電盤(3)と負荷器(20)と設定部(32)の構成と同様である。実施形態4の複数の空気調和機(10)の各々の構成は、実施形態3の空気調和機(10)の構成と同様である。なお、実施形態4では、設定部(32)は、複数の空気調和機(10)に兼用される。また、実施形態4では、設定部(32)は、調整装置(50)の外部に設けられる。言い換えると、設定部(32)は、空気調和機(10)の外部に設けられる。
以上のように、実施形態4の空気調和機(10)では、実施形態3の空気調和機(10)と同様の効果を得ることができる。例えば、分電盤(3)の電源側に電流センサを設ける必要がないので、このような電流センサを設ける場合よりも、配線に要する費用や電流センサの製造に要する費用などの費用(例えば初期費用)を低減することができる。
また、実施形態4のシステム(1)では、設定部(32)は、複数の空気調和機(10)に兼用される。
なお、以上の説明では、調整部(60)がアクティブフィルタ(61)である場合を例に挙げたが、これに限定されない。
また、以上の説明では、目標皮相電力(空気調和機(10)から交流電源(2)に与えられる皮相電力の目標値)に応じた情報の一例として負荷器(20)(空気調和機(10)とともに交流電源(2)に接続される機器)の運転状態に関する情報を例に挙げたが、これに限定されない。例えば、目標皮相電力に応じた情報は、空気調和機(10)から交流電源(2)に与えられる皮相電力の目標値を示す皮相電力指令であってもよい。
なお、制御部(80)は、負荷器(20)の運転状態に基づいて、負荷器(20)の動作に起因する電源力率(交流電源(2)の力率)の変動量を推定し、電源力率が目標力率となるように、負荷器(20)の動作に起因する電源力率の変動量に応じて、目標補償電流(調整装置(50)に入力される電流(Ir1a,Is1a,It1a)の目標値)を決定するように構成されてもよい。
また、以上の説明において、空気調和機(10)の停止中に駆動するアクティブフィルタ(61)のキャリア周波数は、空気調和機(10)の駆動中に駆動するアクティブフィルタ(61)のキャリア周波数よりも低くてもよい。
また、以上の説明において、アクティブフィルタ(61)には、アクティブフィルタ(61)を構成する部品の温度を検出する温度センサ(図示を省略)が設けられてもよい。この温度センサの検出結果は、制御部(80)に送信される。そして、制御部(80)は、アクティブフィルタ(61)を構成する部品の温度に応じて、アクティブフィルタ(61)のキャリア周波数を変更してもよい。
また、以上の説明において、アクティブフィルタ(61)には、アクティブフィルタ(61)に含まれるリアクトル(61b)およびスイッチング素子(61c)の各々の温度を検出する温度センサ(図示を省略)が設けられてもよい。この温度センサの検出結果は、制御部(80)に送信される。そして、制御部(80)は、アクティブフィルタ(61)に含まれるリアクトル(61b)およびスイッチング素子(61c)の各々の温度に応じて、アクティブフィルタ(61)のキャリア周波数を変更してもよい。
また、以上の説明において、制御部(80)は、空気調和機(10)の停止中にアクティブフィルタ(61)が駆動する場合に、冷却器(65)を駆動させてもよい。
また、以上の説明において、アクティブフィルタ(61)は、ワイドギャップ半導体を用いて構成されてもよい。例えば、アクティブフィルタ(61)に含まれるスイッチング素子は、ワイドギャップ半導体の一例であるシリコンカーバイト,酸化ガリウム,ダイヤモンドのいずれかを用いて構成されてもよい。
また、以上の説明において、制御部(80)は、力率割引が実施される時間帯(例えば8時から22時までの時間帯)を含む14時間以上の期間において調整部(60)が連続的に駆動するように、調整部(60)を制御してもよい。
なお、システム(1)において行われるデータ(または信号)の送受信の方式は、有線方式であってもよいし、無線方式であってもよい。具体的には、各種センサ(例えば第1電流検出器(71)や第2電流検出器(72)など)と制御部(80)との間のデータの送受信、入力部(30)(状態検出部(31)または設定部(32))と制御部(80)との間の信号の送受信などは、有線方式であってもよいし、無線方式であってもよい。なお、このようなデータ(または信号)の送受信の方式を無線方式とすることにより、配線を削除することができる。
2 交流電源
3 分電盤
10 空気調和機
20 負荷器(交流電源に接続される機器)
30 入力部
31 状態検出部
32 設定部
40 電力変換装置
50 調整装置
60 調整部
65 冷却器
80 制御部
Claims (13)
- 交流電源(2)に接続される空気調和機(10)であって、
前記空気調和機(10)の電源入力端における皮相電力を調整する調整部(60)と、
前記空気調和機(10)から前記交流電源(2)に与えられる皮相電力の目標値に応じた情報に基づいて前記調整部(60)を制御する制御部(80)とを備える
ことを特徴とする空気調和機。 - 請求項1において、
前記調整部(60)は、前記交流電源(2)に接続されるアクティブフィルタ(61)、進相コンデンサ(62a)および該進相コンデンサ(62a)と前記交流電源(2)との接続を切り換えるコンデンサ切り換え機構(62b)、遅相リアクトル(63a)および該遅相リアクトル(63a)と前記交流電源(2)との接続を切り換えるリアクトル切り換え機構(63b)のうち少なくとも1つを含む
ことを特徴とする空気調和機。 - 請求項1または2において、
前記空気調和機(10)から前記交流電源(2)に与えられる皮相電力の目標値に応じた情報は、前記空気調和機(10)とともに前記交流電源(2)に接続される機器(20)の運転状態に関する情報、または、前記空気調和機(10)から前記交流電源(2)に与えられる皮相電力の目標値を示す皮相電力指令である
ことを特徴とする空気調和機。 - 請求項1または2において、
前記空気調和機(10)から前記交流電源(2)に与えられる皮相電力の目標値に応じた情報は、前記空気調和機(10)とともに前記交流電源(2)に接続される機器(20)の運転状態に関する情報であり、
前記空気調和機(10)とともに前記交流電源(2)に接続される機器(20)の運転状態に関する情報は、入力部(30)に入力され、
前記制御部(80)は、前記入力部(30)に入力される情報に基づいて前記調整部(60)を制御する
ことを特徴とする空気調和機。 - 請求項4において、
前記入力部(30)は、前記空気調和機(10)とともに前記交流電源(2)に接続される機器(20)の運転状態を検出する状態検出部(31)を含み、
前記制御部(80)は、前記状態検出部(31)の検出結果に基づいて前記調整部(60)を制御する
ことを特徴とする空気調和機。 - 請求項4において、
前記入力部(30)は、前記空気調和機(10)とともに前記交流電源(2)に接続される機器(20)の種類および有無のうち少なくとも一方が設定される設定部(32)を含み、
前記制御部(80)は、前記設定部(32)の設定に基づいて前記調整部(60)を制御する
ことを特徴とする空気調和機。 - 請求項1~6のいずれか1つにおいて、
前記制御部(80)は、前記空気調和機(10)の停止中であっても、前記空気調和機(10)から前記交流電源(2)に与えられる皮相電力の目標値に応じた情報に基づいて前記調整部(60)を制御する
ことを特徴とする空気調和機。 - 請求項7において、
前記調整部(60)は、前記交流電源(2)に接続されるアクティブフィルタ(61)を含み、
前記空気調和機(10)の停止中に駆動する前記アクティブフィルタ(61)のキャリア周波数は、前記空気調和機(10)の駆動中に駆動する前記アクティブフィルタ(61)のキャリア周波数よりも低い
ことを特徴とする空気調和機。 - 請求項7において、
冷却器(65)を備え、
前記調整部(60)は、前記交流電源(2)に接続されるアクティブフィルタ(61)を含み、
前記冷却器(65)は、前記アクティブフィルタ(61)を冷却し、
前記制御部(80)は、前記空気調和機(10)の停止中に前記アクティブフィルタ(61)が駆動する場合に、前記冷却器(65)を駆動させる
ことを特徴とする空気調和機。 - 請求項1~9のいずれか1つにおいて、
前記調整部(60)は、前記交流電源(2)に接続されるアクティブフィルタ(61)を含み、
前記制御部(80)は、前記アクティブフィルタ(61)を構成する部品の温度に応じて前記アクティブフィルタ(61)のキャリア周波数を変更する
ことを特徴とする空気調和機。 - 請求項10において、
前記アクティブフィルタ(61)は、リアクトル(61b)と、スイッチング素子(61c)とを含み、
前記制御部(80)は、前記アクティブフィルタ(61)に含まれる前記リアクトル(61b)および前記スイッチング素子(61c)の各々の温度に応じて前記アクティブフィルタ(61)のキャリア周波数を変更する
ことを特徴とする空気調和機。 - 請求項1~11のいずれか1つにおいて、
前記調整部(60)は、前記交流電源(2)に接続されるアクティブフィルタ(61)を含み、
前記アクティブフィルタ(61)は、ワイドギャップ半導体を用いて構成される
ことを特徴とする空気調和機。 - 請求項1~12のいずれか1つにおいて、
前記制御部(80)は、力率割引が実施される時間帯を含む14時間以上の期間において前記調整部(60)が連続的に駆動するように、前記調整部(60)を制御する
ことを特徴とする空気調和機。
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