WO2012081078A1 - Climatiseur et dispositif d'alimentation en eau chaude - Google Patents

Climatiseur et dispositif d'alimentation en eau chaude Download PDF

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Publication number
WO2012081078A1
WO2012081078A1 PCT/JP2010/072394 JP2010072394W WO2012081078A1 WO 2012081078 A1 WO2012081078 A1 WO 2012081078A1 JP 2010072394 W JP2010072394 W JP 2010072394W WO 2012081078 A1 WO2012081078 A1 WO 2012081078A1
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Prior art keywords
operation mode
motor
control circuit
air conditioner
power
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Application number
PCT/JP2010/072394
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English (en)
Japanese (ja)
Inventor
能登原　保夫
渉 初瀬
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日立アプライアンス株式会社
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Priority to JP2012548559A priority Critical patent/JP5531112B2/ja
Priority to PCT/JP2010/072394 priority patent/WO2012081078A1/fr
Publication of WO2012081078A1 publication Critical patent/WO2012081078A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/025—Motor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/18—Details or features not otherwise provided for combined with domestic apparatus
    • F24F2221/183—Details or features not otherwise provided for combined with domestic apparatus combined with a hot-water boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to an air conditioner and a hot water supply system.
  • the compressor is started by energizing the electric heater attached to the container housing the compressor, or by supplying current to the compressor motor with a low voltage that does not cause the compressor motor to rotate, thereby generating copper loss.
  • an air conditioner in which a refrigerant is heated before see Patent Document 1.
  • the air conditioner according to the first aspect of the present invention performs at least a heating operation for heating the room, and the indoor heat exchanger installed indoors and the outdoor heat exchange installed outdoor ,
  • an inverter circuit that generates AC power to be supplied to the motor from the DC power using the switching element, and control that outputs a drive signal for controlling the operation of the switching element to the inverter circuit based on the rotational speed command. And a circuit.
  • the control circuit selects one of a plurality of operation modes including at least a quick heating operation mode for rapid heating and a normal operation mode during heating operation, and selects the selected operation mode
  • the drive signal according to is output to the inverter circuit.
  • the AC power supplied to the motor in the fast heating operation mode includes harmonic components more than the AC power supplied to the motor in the normal operation mode.
  • the control circuit when heating operation is started, selects the fast warm-up operation mode and selects the fast warm-up operation mode.
  • the control circuit preferably selects the normal operation mode when the difference between the set temperature and the room temperature falls within a predetermined range.
  • the control circuit determines and determines the phase position of AC power at which the switching element conducts.
  • the control circuit may output the drive signal based on PWM control.
  • the control circuit controls the PWM It is preferable to output a drive signal based on control.
  • the control circuit when the fast heating operation mode is selected, performs switching based on a difference between a predetermined set temperature and room temperature. It is preferable to change the phase position of AC power conducted by the element and switch the order of harmonic components to be removed in the AC power supplied to the motor.
  • the control circuit determines that the harmonic components of more orders in the AC power supplied to the motor as the difference between the set temperature and the room temperature becomes smaller.
  • the current value of the reactive current flowing to the motor in the fast heating operation mode is the current value of reactive current flowing to the motor in the normal operation mode. Preferably, it is larger than the current value.
  • the reactive current in the fast heating mode flows in the field weakening direction with respect to the motor.
  • the air conditioner of any of the first to eighth aspects further includes a four-way valve that switches the circulation direction of the refrigerant.
  • the plurality of operation modes further include a defrosting operation mode for defrosting the outdoor heat exchanger.
  • the defrosting operation mode is selected by the control circuit, the four-way valve switches the circulation direction of the refrigerant in the reverse direction to the fast heating operation mode and the normal operation mode.
  • the AC power supplied to the motor in the defrosting operation mode includes harmonic components more than the AC power supplied to the motor in the normal operation mode. You may do this.
  • the control circuit determines the phase position of the AC power to which the switching element conducts, and determines the phase position determined.
  • the control circuit When the drive signal is output based on the selected and the normal operation mode is selected, the control circuit preferably outputs the drive signal based on PWM control.
  • the control circuit performs PWM control when the rotation speed of the motor is less than a predetermined value even when the defrosting operation mode is selected. It is preferable to output a drive signal based on.
  • the current value of the reactive current flowing to the motor in the defrosting operation mode is the current of the reactive current flowing to the motor in the normal operation mode It is preferred to be larger than the value.
  • an air conditioner according to a fourteenth aspect of the present invention performs at least a heating operation for heating an indoor space, and the indoor heat exchanger installed indoors and the outdoor heat exchange installed outdoor , A compressor that compresses the refrigerant that is circulated between the indoor heat exchanger and the outdoor heat exchanger, a motor that drives the compressor, a four-way valve that switches the refrigerant circulation direction, and DC power
  • the control circuit selects either the defrosting operation mode for defrosting the outdoor heat exchanger or the normal operation mode during the heating operation, and
  • the drive signal is output to the inverter circuit.
  • the four-way valve switches the circulation direction of the refrigerant in the reverse direction when the defrosting operation mode is selected by the control circuit.
  • the AC power supplied to the motor in the defrosting operation mode includes harmonic components more than the AC power supplied to the motor in the normal operation mode.
  • the control circuit determines a phase position of AC power conducted by the switching element, and determines the phase position determined.
  • the control circuit preferably outputs the drive signal based on PWM control.
  • the control circuit performs PWM control when the rotational speed of the motor is less than a predetermined value even when the defrosting operation mode is selected. It is preferable to output a drive signal based on.
  • the current value of the reactive current flowing to the motor in the defrosting operation mode is the current of the reactive current flowing to the motor in the normal operation mode It is preferred to be larger than the value.
  • a hot water supply system comprising: a first heat exchanger connected to the water pipe to warm water flowing in the water pipe; A second heat exchanger that absorbs heat for warming water from the outside air by the first heat exchanger; a compressor that compresses a refrigerant that is circulated between the first heat exchanger and the second heat exchanger; An inverter circuit having a motor for driving a compressor and a switching element for conducting or interrupting DC power, and generating AC power for supplying the motor from the DC power using the switching element; And a control circuit for outputting a drive signal for controlling the operation of the switching element to the inverter circuit.
  • the control circuit selects one of a plurality of operation modes including at least a rapid hot water supply operation mode for rapidly heating water and a normal operation mode, and a drive corresponding to the selected operation mode Output a signal to the inverter circuit.
  • the AC power supplied to the motor in the rapid hot water supply operation mode includes harmonic components more than the AC power supplied to the motor in the normal operation mode.
  • the control circuit controls the rapid hot water supply operation mode and the normal operation mode based on at least one of water temperature, ambient temperature and time. It is preferable to select at least one of them.
  • the control circuit determines and determines the phase position of AC power conducted by the switching element.
  • the control circuit may output the drive signal based on PWM control.
  • the control circuit performs PWM control when the rotation speed of the motor is less than a predetermined value even when the rapid hot water supply operation mode is selected. It is preferable to output a drive signal based on.
  • the control circuit sets at least one of the water temperature, the outside air temperature and the time. It is preferable to change the phase position of AC power conducted by the switching element based on the switching of the order of harmonic components to be removed in the AC power supplied to the motor.
  • the control circuit removes harmonics of more orders in the AC power supplied to the motor as the temperature of the water or the ambient temperature increases. It is further preferable to change the phase position of the AC power through which the switching element conducts, as described above.
  • the control circuit may output a drive signal such that a predetermined reactive current flows in the motor in the rapid hot water supply operation mode. it can.
  • the control circuit determines that the water temperature is less than a predetermined first threshold and the outside air temperature has a predetermined second threshold. If the temperature is less than or the temperature of water is less than the predetermined third threshold and the time is within the predetermined time zone, the drive signal is supplied so that the reactive current flows in the motor in the rapid hot water supply operation mode. It is preferable to output.
  • the reactive current in the rapid hot water supply operation mode flows in the field weakening direction with respect to the motor.
  • the electric heater and the like can be significantly miniaturized. Or, it is not necessary to add the electric heater and the parts related to the electric heater.
  • FIG. 1 is a diagram showing the configuration of an air conditioner 300 according to an embodiment.
  • the air conditioner 300 includes an indoor unit chassis 301, a heat exchanger 302, a fan 303, an input circuit 304, an outdoor unit casing 305, a heat exchanger 306, a fan 307, a compressor 308, a motor for compressor 309, and a four-way valve.
  • a motor controller 311 and a pipe 312 are provided.
  • the heat exchanger 302, the fan 303 and the input circuit 304 are housed in the indoor unit casing 301. These are installed as indoor units in a room such as a building.
  • the heat exchanger 306, the fan 307, the compressor 308, the compressor motor 309, the four-way valve 310 and the motor control device 311 are accommodated in the outdoor unit casing 305. These are installed as outdoor units outside the building or the like.
  • a pipe 312 is provided between the heat exchanger 302 of the indoor unit and the heat exchanger 306 of the outdoor unit.
  • the pipe 312 is connected to the compressor 308 via the four-way valve 310.
  • the pipe 312 is filled with a refrigerant.
  • the compressor 308 is driven by a compressor motor 309 to compress the refrigerant.
  • the operation of the compressor motor 309 is controlled by the motor control device 311.
  • the refrigerant compressed by the compressor 308 is in a high temperature, high pressure state, and is sent through the pipe 312 to the heat exchanger 302 of the indoor unit at the time of heating.
  • the heat stored in the refrigerant is dissipated in the heat exchanger 302, and the warm air is blown into the room by the fan 303.
  • the refrigerant that has become a liquid due to the heat radiation is sent to the heat exchanger 306 of the outdoor unit, absorbs the heat of vaporization from the outside air in the heat exchanger 306, and then returns to the compressor 308 as a gas. In this way, the refrigerant is circulated between the heat exchanger 302 and the heat exchanger 306, whereby the heating operation is performed in the air conditioner 300.
  • the refrigerant is circulated in the opposite direction to that at the time of heating. That is, the refrigerant compressed by the compressor 308 is sent to the heat exchanger 306 of the outdoor unit. In the outdoor unit, the heat stored in the refrigerant is dissipated in the heat exchanger 306. The refrigerant that has become a liquid due to heat release is sent to the heat exchanger 302 of the indoor unit, and after absorbing heat of vaporization from room air in the heat exchanger 302, it turns into a gas and returns to the compressor 308. Thus, cooling operation is performed in the air conditioner 300 by circulating the refrigerant between the heat exchanger 302 and the heat exchanger 306.
  • the switching of the refrigerant circulation direction at the time of heating and cooling as described above is performed by the four-way valve 310. That is, at the time of heating, the four-way valve 310 is such that the refrigerant compressed in the compressor 308 is discharged to the heat exchanger 302 of the indoor unit, and from there through the heat exchanger 306 of the outdoor unit to be returned to the compressor 308. The state of is switched. On the other hand, at the time of cooling, the four-way valve is such that the refrigerant compressed in the compressor 308 is discharged to the heat exchanger 306 of the outdoor unit, and from there to the heat exchanger 302 of the indoor unit and back to the compressor 308 The state of 310 is switched.
  • the input circuit 304 When the user operates a remote control or the like to input an operation command to the input circuit 304 of the indoor unit, the input circuit 304 performs heating operation and cooling operation based on the operation command and information such as room temperature. Either one is selected and the rotational speed of the compressor motor 309 is calculated. And while switching the four-way valve 310 according to the selected driving
  • the motor control device 311 controls the operation of the compressor motor 309 based on the speed command received from the input circuit 304 to cause the air conditioner 300 to perform a heating operation or a cooling operation.
  • FIG. 2 is a diagram showing the configuration of the motor control device 311.
  • the motor control device 311 includes a DC power supply 1, an inverter circuit 2, a current detector 4, a voltage detector 5 and a control circuit 6, and is connected to a compressor motor 309.
  • the direct current power supply 1 is constituted by a known converter device using a rectification circuit or the like, generates predetermined direct current power from a commercial alternating current power supply, and supplies it to the inverter circuit 2.
  • the voltage of the DC power generated by the DC power supply 1 is detected by the voltage detector 5 and output to the control circuit 6.
  • the inverter circuit 2 has a switching element for conducting or interrupting the DC power output from the DC power supply 1, generates AC power from the DC power using this switching element, and generates the compressor motor 309. Supply.
  • the compressor motor 309 is a three-phase AC motor
  • the inverter circuit 2 has one or more switching elements for each phase. The operation of each switching element is controlled by a drive signal from the control circuit 6.
  • the details of the inverter circuit 2 are shown in FIG. Here, a three-phase inverter will be described as an example.
  • the inverter circuit 2 includes a switching element 151 operating as an upper arm, a diode 152, and a switching element 161 operating as a lower arm and a diode 162.
  • the series circuit 150 in which the upper arm and the lower arm are connected in series constitutes each phase (U phase, V phase, W phase) of the inverter circuit 2.
  • the switching elements 151 and 161 are driven based on the drive signal output from the control circuit 6, and power is supplied to the compressor motor 309 from the intermediate connection point of the upper arm and the lower arm.
  • the current value of the AC power supplied from the inverter circuit 2 to the compressor motor 309 is detected for each phase by the current detector 4, and a signal indicating the detection result is output from the current detector 4 to the control circuit 6. Ru.
  • the compressor motor 309 is a three-phase AC motor, even if the current value of only two phases is detected by the current detector 4 and the current value of the other one phase is estimated based on these detection results. Good.
  • Control circuit 6 uses an inverter as a drive signal for controlling the operation of each switching element of inverter circuit 2 based on the speed command from input circuit 304 and the current value of AC power detected by current detector 4. Output to circuit 2 As each switching element of the inverter circuit 2 repeats conduction or disconnection according to the drive signal, DC power from the DC power supply 1 is converted to AC power and supplied to the compressor motor 309. As the compressor motor 309 drives the compressor 308 using this AC power, the refrigerant is compressed in the compressor 308, and the heating operation or the cooling operation is performed according to the operation command.
  • FIG. 3 is a diagram showing the configuration of the control circuit 6.
  • the control circuit 6 includes a d-axis current command generator 61, a speed controller 62, a voltage command calculator 63, a first pulse modulator 64 and a second pulse modulator 65, a speed / phase estimator 66, three phases / two phases.
  • a converter 67 and a switch 68 are provided.
  • the compressor motor 309 is a three-phase AC motor, and the phase current detection signals lu, lv and lw detected for each of the U, V and W phases are output from the current detector 4 to the control circuit.
  • An example input to 6 is shown.
  • phase current detection signals lu, lv, lw inputted to the control circuit 6 are converted into the d-axis current signal Idc and the q-axis current signal Iqc in the 3-phase / 2-phase converter 67, and the voltage command computing unit 63 The respective signals are output to the phase estimator 66.
  • the speed controller 62 When the speed command (rotational speed command) f1 * is input from the input circuit 304 to the control circuit 6, the deviation between the speed command f1 * and the rotational speed f1 output from the speed / phase estimator 66 is calculated. The result is output to the speed controller 62.
  • the speed controller 62 generates a q-axis current command signal Iqc * based on the deviation between the speed command f1 * and the rotational speed f1, and outputs the q-axis current command signal Iqc * to the voltage command calculator 63.
  • the d-axis current command generator 61 generates a predetermined d-axis current command signal Idc * and outputs it to the voltage command calculator 63.
  • the value of the d-axis current command signal Idc * generated by the d-axis current command generator 61 is 0 in a normal state.
  • Voltage command computing unit 63 generates d-axis voltage command signal Vdc * based on d-axis current command signal Idc * from d-axis current command generator 61 and q-axis current command signal Iqc * from speed controller 62. And q axis voltage command signal Vqc *. At this time, voltage command computing unit 63 causes d-axis voltage command signal Vdc * and q-axis so that the actual current flowing through compressor motor 309 follows d-axis current command signal Idc * and q-axis current command signal Iqc *. A voltage command signal Vqc * is obtained.
  • the calculated d-axis voltage command signal Vdc * and q-axis voltage command signal Vqc * are output from the voltage command calculator 63 to the first pulse modulator 64, the second pulse modulator 65, and the velocity / phase estimator 66. .
  • the speed / phase estimator 66 receives the d-axis current signal Idc and the q-axis current signal Iqc from the three-phase / two-phase converter 67 and the d-axis voltage command signal Vdc * and the q-axis voltage command from the voltage command calculator 63.
  • the rotational speed and voltage phase of the compressor motor 309 are estimated based on the signal Vqc *.
  • the rotational speed f1 is output to the front stage of the speed controller 62 and the first pulse modulator 64, and the phase signal ⁇ dc is output to the first pulse modulator 64, the second pulse modulator 65, It outputs to 3 phase / 2 phase converter 67.
  • the pulse modulator 64 is based on the d-axis voltage command signal Vdc * and the q-axis voltage command signal Vqc * from the voltage command calculator 63 and the rotational speed f1 and the phase signal ⁇ dc from the speed / phase estimator 66.
  • a pulse signal corresponding to the timing at which each switching element of the inverter circuit 2 is turned on or off is generated and output to the switch 68.
  • the first pulse modulator 64 switches the switching operation of each switching element based on the phase of the AC waveform so that the AC power with the harmonic component of the rectangular wave AC reduced to some extent is output from the inverter circuit 2.
  • Generate a pulse signal for control
  • the pulse signal output from the first pulse modulator 64 is referred to as a PHM pulse signal.
  • a control method performed using a PHM pulse signal is referred to as PHM control.
  • second pulse modulator 65 is based on d-axis voltage command signal Vdc * and q-axis voltage command signal Vqc * from voltage command calculator 63 and phase signal ⁇ dc from speed / phase estimator 66.
  • a pulse signal corresponding to the timing at which each switching element of the inverter circuit 2 is turned on or off is generated by the well-known PWM (Pulse Width Modulation) method, and is output to the switch 68.
  • PWM Pulse Width Modulation
  • the second pulse modulator 65 has a two-phase to three-phase converter 651, a comparator 652 and a carrier generator 653.
  • the d-axis voltage command signal and the q-axis voltage command signal output from the voltage command computing unit are input to the two-phase to three-phase converter 651, and three-phase voltage command signals VU *, VV *, V with AC waveforms. Convert to W *.
  • Three-phase voltage command signals V U *, V V *, V W * are output to comparison circuit 652.
  • the comparison circuit 652 compares the three-phase voltage command signals V U *, V V *, V W * with the triangular carrier wave output from the carrier wave generator 653 and outputs a PWM pulse signal for driving the switching element. .
  • the switch 68 selects either the PHM pulse signal output from the first pulse modulator 64 for PHM control or the PWM pulse signal output from the second pulse modulator 65 for PWM control. Note that which pulse signal is selected by the switch 68 will be described in detail later.
  • the PHM pulse signal or PWM pulse signal selected by the switch 68 is output to the inverter circuit 2 as a drive signal.
  • control circuit 6 outputs the PHM pulse signal or the PWM pulse signal as a drive signal to the inverter circuit 2. According to the drive signal, each switching element of the inverter circuit 2 is turned on or off to convert DC power from the DC power supply 1 into AC power.
  • FIGS. 4 (a), 4 (b) and 4 (c) are diagrams for explaining the basic principle of eliminating harmonic components by PHM pulse signals.
  • the control method with the smallest number of switchings per unit phase when converting DC power to AC power is rectangular wave control.
  • this rectangular wave control state as shown in FIG. 4A, switching is performed once in a half cycle, that is, twice in one cycle.
  • the number of switching times is significantly less than that in the PWM method, the loss due to switching is significantly reduced.
  • the alternating current power waveform contains many harmonic components such as the fifth, seventh, and eleventh orders, and these harmonic components cause distortion. Therefore, in order to reduce distortion due to harmonics, it is desirable to increase the number of times of switching of the switching element more than the state of rectangular wave control shown in FIG. 4A and eliminate harmonics as much as possible.
  • the harmonic components to be removed vary depending on the purpose of use of the AC power to be converted, but it is not necessary to remove all the harmonic components. Therefore, the number of switchings is reduced compared to the PWM method. For example, in AC power supplied to a three-phase electric rotating machine, harmonic components which are multiples of 3 cancel each other, and therefore, there is no big problem even if they are not removed.
  • the fifth harmonic component is a vibration waveform having five peak values in a period of an electrical angle ⁇ which is a half cycle of an AC power waveform as shown in FIGS. 4 (a) and 4 (b).
  • the rectangular wave shown in FIG. 4 (a) includes many harmonic components obtained by Fourier expansion in addition to the fundamental wave of sine waves, and one of the harmonic components is the fifth harmonic component.
  • the fifth harmonic component is superimposed on each unit phase, for example, every half cycle as shown in FIG. 4 (b). As a matter of course, Fourier expansion of the superimposed waveform results in the above-mentioned fifth harmonic.
  • the first pulse modulator 64 has an AC power waveform in which the superimposed waveform having the same area as the fifth harmonic component contained in the rectangular wave is deleted at a specific position. Generates a PHM pulse signal.
  • the superimposed waveform summarized into one every half cycle is deleted. By doing this, it is possible to reduce the number of times of switching when removing the fifth harmonic component from the rectangular wave.
  • FIG. 4C is a waveform of a PHM pulse signal for generating the AC power waveform shown in FIG. 4B.
  • a PHM pulse signal is generated by the first pulse modulator 64 and the switching element of the inverter circuit 2 is operated according to the PHM pulse signal, the AC power of the waveform as shown in FIG. Output from 2 As a result, AC power from which the fifth harmonic component has been eliminated is supplied from the inverter circuit 2 to the compressor motor 309.
  • FIG. 5 is a flowchart showing the basic principle of eliminating each harmonic component.
  • PHM pulse signals can be generated by considering the conditions. That is, the pulse pattern of the PHM pulse signal can be obtained by solving an equation in which the component of the harmonic order to be subjected to Fourier series expansion and deletion of f ( ⁇ t) is zero.
  • FIG. 6 is a diagram showing, as an example, a generation process and characteristics of a pulse waveform pattern at line voltages of U-phase and V-phase for eliminating third, fifth and seventh harmonics.
  • the line voltage is the potential difference between the terminals of each phase.
  • the phase voltage of the U phase is Vu and the phase voltage of the V phase is Vv
  • the line voltage Vuv between the U and V phases Vu-Vv Is represented.
  • the V-phase and W-phase line voltages, and the W-phase and U-phase line voltages are the same. Therefore, the generation of a U-phase and V-phase line voltage pattern will be described as a representative example.
  • the horizontal axis of FIG. 6 represents the phase based on the fundamental wave of the line voltage of U phase and V phase. In the following, this is referred to as the UV line voltage reference phase ⁇ uvl.
  • This UV inter-line voltage reference phase ⁇ uvl corresponds to the electrical angle shown on the horizontal axis in FIG. 4 (a) and FIG. 4 (c).
  • the pulse waveform pattern in the section of ⁇ ⁇ ⁇ uvl ⁇ 2 ⁇ has a symmetrical shape obtained by inverting the pulse waveform pattern in the section of 0 ⁇ ⁇ uvl ⁇ ⁇ shown in FIG.
  • the fundamental wave of the voltage pulse is a sine wave voltage based on ⁇ uvl.
  • the pulses to be generated are respectively arranged at positions as illustrated in the figure with respect to ⁇ uvl according to the illustrated procedure, centering on ⁇ / 2 of this fundamental wave.
  • the arrangement position of the pulse in FIG. 6 can be represented by the electrical angle. Therefore, in the following, the placement position of this pulse is defined as a specific electrical angle position.
  • pulse trains S1 to S4 and S1 'to S2' are formed.
  • This pulse train has a spectral distribution which does not include the third, fifth and seventh harmonics with respect to the fundamental wave.
  • this pulse train is a waveform in which the third, fifth and seventh harmonics are eliminated from the rectangular wave in the section of 0 ⁇ ⁇ uvl ⁇ 2 ⁇ .
  • the order of harmonics to be deleted may be other than the third, fifth and seventh orders.
  • the configuration of the first pulse modulator 64 for PHM control is shown in FIG.
  • the first pulse modulator 64 includes a voltage phase difference calculator 641, a modulation factor calculator 642, and a pulse generator 644.
  • the d-axis voltage command signal Vdc * and the q-axis voltage command signal Vqc * output from the voltage command computing unit 63 are input to the voltage phase difference computing unit 641 and the modulation factor computing unit 642 in the first pulse modulator 64.
  • the voltage phase difference ⁇ calculated by the voltage phase difference calculator 641 is added to the phase signal ⁇ dc from the speed / phase estimator 66, and then output to the pulse generator 644 as a voltage phase signal ⁇ v.
  • the modulation factor calculator 642 calculates the modulation factor by normalizing the magnitude of the vector represented by the d-axis voltage command signal Vdc * and the q-axis voltage command signal Vqc * with the voltage of the DC power supply 1, and calculates the modulation factor
  • the corresponding modulation degree signal a is output to the pulse generator 644.
  • the modulation degree signal a is determined based on the voltage of the DC power supply 1, and the modulation degree a tends to become smaller as the voltage becomes higher. Also, the modulation factor a tends to increase as the amplitude value of the command value increases. Specifically, assuming that the voltage of the DC power supply 1 is Vdc, it is expressed by Equation (3).
  • Vd represents the amplitude value of the d-axis voltage command signal Vdc *
  • Vq represents the amplitude value of the q-axis voltage command signal Vqc *.
  • the pulse generator 644 is a voltage phase signal ⁇ v obtained by adding the phase signal ⁇ dc to the voltage phase difference ⁇ output from the voltage phase difference calculator 641, the modulation degree signal a from the modulation degree calculator 642, Based on the rotational speed f1 from the speed / phase estimator 66, a pulse signal based on PHM control corresponding to each of the U phase, V phase, and W phase is generated. Then, the generated pulse signal is output to the switch 68.
  • the pulse generator 644 is implemented by, for example, a phase searcher 645 and a timer counter comparator 646 as shown in FIG.
  • the phase searcher 645 determines the phase to which the switching pulse should be outputted from the table of the phase information of the switching pulse stored in advance based on the voltage phase signal ⁇ v, the modulation degree signal a and the rotational speed f1.
  • a search is made for each phase of W phase, and information on the search result is output to timer counter comparator 646.
  • the timer counter comparator 646 generates a PHM pulse signal as a switching command for each of the U phase, V phase and W phase based on the search result output from the phase search unit 645.
  • the PHM pulse signal for each phase generated by the timer counter comparator 646 is output to the switch 68 as described above.
  • the phase searcher 645 takes in the modulation degree signal a as an input signal in step 801, and takes in the voltage phase signal ⁇ v as an input signal in step 802.
  • the phase searcher 645 calculates the range of the voltage phase corresponding to the next control cycle in consideration of the control delay time and the rotational speed f1 based on the input current voltage phase signal ⁇ v. .
  • the phase searcher 645 performs a ROM search. In this ROM search, switching ON and OFF phases are searched from a table stored in advance in a ROM (not shown) in the range of voltage phases calculated in step 803 based on the input modulation degree signal a. .
  • the phase searcher 645 outputs the switching on / off phase information obtained by the ROM search in step 804 to the timer counter comparator 646 in step 805.
  • the timer counter comparator 646 converts this phase information into time information in step 806 and generates a PHM pulse signal using a compare match function with the timer counter.
  • the process of converting the phase information into time information utilizes the rotational speed f1.
  • information on the switching on / off phase obtained by the ROM search in step 804 may be used to generate a PHM pulse in step 806 using a compare match function with a phase counter.
  • the timer counter comparator 646 outputs the PHM pulse signal generated in step 806 to the switch 68 in the next step 807.
  • the phase searcher 645 and the timer counter comparator 646 perform the processing of the steps 801 to 807 described above, whereby the pulse generator 644 generates a PHM pulse signal.
  • the pulse generation may be performed by executing the processing shown in the flowchart of FIG. 10 in the pulse generator 644 instead of the flowchart of FIG.
  • a switching phase is generated for each control cycle of the voltage command calculator 63 without using a table search method for searching the switching phase using a table stored in advance. It is.
  • the pulse generator 644 inputs the modulation degree signal a in step 801 and inputs the voltage phase signal ⁇ v in step 802.
  • the pulse generator 644 calculates the voltage on / off phase of switching in consideration of the control delay time and the rotational speed f1 based on the input modulation degree signal a and voltage phase signal ⁇ v.
  • a pulse pattern calculation is performed to determine each control cycle of the controller 63.
  • phase information obtained based on the rotational speed f1 is converted into time information, and a PHM pulse signal is generated using a compare match function with a timer counter or a phase counter.
  • the PHM pulse signal thus generated is output to the switch 68 at step 807.
  • step 821 the pulse generator 644 specifies harmonic orders to be deleted based on the rotational speed f 1. According to the harmonic order thus specified, the pulse generator 644 performs processing such as matrix operation in the subsequent step 822 and outputs the pulse reference angle in the step 823.
  • step 822 The matrix operation of step 822 is performed according to the determinants shown by the following equations (4) to (7).
  • the pulse generator 644 performs matrix operation in the next step 822 when third, fifth, and seventh harmonic components are specified in step 821 as the harmonic order to be deleted.
  • Each element in the right side parenthesis of Formula (4) is k1 / 3, k2 / 5, k3 / 7.
  • each element of equation (4) is determined by setting the denominator value as the harmonic order for elimination and the numerator value as an arbitrary odd number excluding odd multiples of the denominator. be able to.
  • the number of elements of the row vector is set to three because there are three types of erasure orders (third, fifth and seventh).
  • a row vector of N elements can be set for N types of erasure orders, and the value of each element can be determined.
  • the numerator and denominator values of each element may be arbitrarily selected for the purpose of spectrum shaping rather than elimination of harmonic components.
  • the numerator and denominator values need not necessarily be integers, but the numerator value should not be an odd multiple of the denominator.
  • the values of the numerator and the denominator do not have to be constants, and may be values that change with time.
  • vectors of three columns can be set as shown in equation (4).
  • a vector of N elements in which the value is determined by a combination of denominator and numerator that is, a vector of N columns.
  • this N-sequence vector is referred to as a harmonic-based phase vector.
  • the harmonic based phase vector is a vector of three columns as in equation (4)
  • the harmonic based phase vector is transposed to calculate equation (5).
  • pulse reference angles from S1 to S4 are obtained.
  • the pulse reference angles S1 to S4 are parameters representing the center position of the voltage pulse, and are compared with a triangular wave carrier described later. As described above, when the pulse reference angle is four (S1 to S4), generally, the number of pulses per cycle of the line voltage is sixteen.
  • pulse reference angles S1 to S8 are obtained.
  • the number of pulses per cycle of the voltage between lines is 32.
  • the relationship between the number of harmonic components to be eliminated and the number of pulses is generally as follows. That is, when the number of harmonic components to be deleted is two, the number of pulses per line voltage is 8 pulses, and when the number of harmonic components to be deleted is three, the number of pulses per line voltage is one Is 16 pulses and there are four harmonic components to be deleted, the number of pulses per line voltage is 32 pulses, and there are five harmonic components to be deleted, one line voltage interval The number of pulses per hit is 64 pulses. Similarly, as the number of harmonic components to be eliminated increases by one, the number of pulses per period of the line voltage doubles.
  • the number of pulses may be different from the above.
  • the pulse generator 644 When the pulse reference angle is obtained by the matrix calculation described above, the pulse generator 644 outputs the pulse reference angle in step 823. Then, in the next step 824, the pulse reference angles thus output are compared with the triangular wave to obtain pulse waveforms of three types of inter-line voltages: UV inter-line voltage, VW inter-line voltage, and WU inter-line voltage.
  • the pulse waveforms of these line-to-line voltages are identical pulse waveforms each having a phase difference of 2 ⁇ / 3. Therefore, hereinafter, only the UV line voltage will be described as a representative of each line voltage.
  • the relationship between the reference phase ⁇ uvl of the UV inter-line voltage, the voltage phase signal ⁇ v, and the magnetic pole position ⁇ e has a relationship of equation (8).
  • FIG. 12 shows an example in the case where there are four line voltage pulses in the range of 0 ⁇ ⁇ uvl ⁇ ⁇ / 2.
  • pulse reference angles S1 to S4 represent central phases of the four pulses.
  • Carr1 ( ⁇ uvl), carr2 ( ⁇ uvl), carr3 ( ⁇ uvl), and carr4 ( ⁇ uvl) represent each of the four channel phase counters.
  • Each of these phase counters is a triangular wave having a period of 2 ⁇ rad with respect to the reference phase ⁇ uvl.
  • carr1 ( ⁇ uvl) and carr2 ( ⁇ uvl) have a deviation of d ⁇ in the amplitude direction, and the relationship between carr3 ( ⁇ uvl) and carr4 ( ⁇ uvl) is also the same.
  • D ⁇ represents the width of the line voltage pulse.
  • the amplitude of the fundamental wave changes linearly with this pulse width d ⁇ .
  • the line voltage pulse is a pulse reference angle S1 representing the central phase of the pulse in the range of 0 ⁇ ⁇ uvl ⁇ ⁇ / 2 and each phase counter carr1 ( ⁇ uvl), carr2 ( ⁇ uvl), carr3 ( ⁇ uvl), carr4 ( ⁇ uvl) It is formed at each of the intersections with ⁇ S4. Thereby, a pulse signal having a symmetrical pattern is generated every 90 degrees.
  • FIG. 13 An example of drawing the waveform of the line voltage generated by using the method as described above for each modulation degree is shown in FIG.
  • the pulse generator 644 steps each inter-line voltage Output at Then, in the next step 826, the output voltage between each line is converted into a gate pulse of each phase.
  • FIG. 14 shows a conversion table for converting each line voltage to a gate pulse of each phase, that is, a phase terminal voltage pulse in step 826.
  • the mode at the left end in the table is one in which numbers are assigned to existing switching states.
  • the relationship between the line voltage and the phase terminal voltage is fixed at 1: 1.
  • Each mode is an active period in which energy is exchanged between the DC side and the three-phase AC side.
  • the voltage between lines in FIG. 14 is obtained by normalizing and arranging a pattern that can be taken as a potential difference between different phases with the voltage Vdc of the DC power supply 1.
  • phase terminal voltage is Vu ⁇ 1 (upper arm of U phase is on, lower arm is off)
  • Vv ⁇ 0 upper arm of V phase is off, lower arm is on
  • Modes 2 to 6 are also based on the same idea.
  • FIG. 15 shows how line voltage pulse waveforms exemplified in FIG. 13 are converted into phase terminal voltage pulses in accordance with the conversion table of FIG.
  • the upper row shows UV line voltage pulses as a representative example of line voltage
  • the U phase terminal voltage Vu, V phase terminal voltage Vv and W phase terminal voltage Vw are shown below it.
  • the upper part of FIG. 15 shows the number of the mode (the active period in which energy is exchanged between the DC side and the three-phase AC side) and the period in which the three phases are shorted.
  • the 3-phase short circuit period either the 3-phase upper arm is turned on or the 3-phase lower arm is turned on, but depending on the switching loss and conduction loss conditions, either switch You can select the mode.
  • the U-phase terminal voltage Vu is 1 and the V-phase terminal voltage Vv is 0 (modes 1 and 6).
  • the U-phase terminal voltage Vu and the V-phase terminal voltage Vv have the same value, that is, Vu is 1 and Vv is 1 (mode 2, 3 phase short circuit), or Vu is 0 and Vv is 0 (mode 5, 3 phase short circuit)
  • the UV line voltage Vuv is -1
  • the U-phase terminal voltage Vu is 0 and the V-phase terminal voltage Vv is 1 (modes 3 and 4). Based on such a relationship, each pulse (gate voltage pulse) of the phase voltage or phase terminal voltage is generated.
  • the first pulse modulator 64 for PHM control generates a PHM pulse signal according to the method described above, and outputs it to the switch 68.
  • the switch 68 selects either the PHM pulse signal output from the first pulse modulator 64 for PHM control or the PWM pulse signal output from the second pulse modulator 65 for PWM control. Output as a drive signal to the inverter circuit 2.
  • the selection of the pulse signal is performed as follows based on the rotational speed (rotational speed) of the compressor motor 309.
  • FIG. 16 shows an example of how the number of revolutions of the compressor motor 309 and the room temperature change when the air conditioner 300 starts the heating operation.
  • the horizontal axis represents the passage of time
  • the vertical axis represents the motor rotational speed and the room temperature, respectively.
  • the example of change of motor rotation speed by PWM control is shown as motor rotation speed A
  • the example of change of motor rotation speed when PWM control and PHM control are used together as motor rotation speed B is shown by a broken line, respectively.
  • An example of change of room temperature by PWM control is shown as room temperature A
  • an example of change of room temperature when PWM control and PHM control are used together as room temperature B is shown by a solid line.
  • the motor rotational speed B increases until it reaches the maximum rotational speed.
  • the maximum rotation speed at this time is higher than that of the above-mentioned motor rotation speed A.
  • each time t 1, t 2, t 3 and t 4 in the case of PWM control and each time t 1 ′, t 2 ′, t 3 ′ and t 4 ′ in the case of using both PWM control and PHM control are compared.
  • PWM control and PHM control are used together is faster. That is, by combining PWM control and PHM control, heating can be performed more rapidly than when only conventional PWM control is used.
  • PWM control and PHM control as described above are used in combination, as shown by reference numeral 162 in FIG. 16, the period from when heating operation is started to when motor rotational speed B reaches a predetermined rotational speed is PWM Energization by control is performed from the inverter circuit 2 to the compressor motor 309. This is because it is difficult to apply PHM control when the motor rotational speed is low and the energization ratio is small.
  • the switch 68 selects the PWM pulse signal output from the second pulse modulator 65 for PWM control, and outputs it to the inverter circuit 2.
  • the switch 68 selects the PWM pulse signal output from the second pulse modulator 65 for PWM control, and outputs it to the inverter circuit 2.
  • the heating operation is performed using PWM control and PHM control in combination from the start of the heating operation to time t3 '.
  • Such an operation mode is hereinafter referred to as a fast warm-up operation mode.
  • the heating operation is performed using only PWM control as in the conventional case.
  • Such an operation mode is hereinafter referred to as a normal operation mode.
  • the control circuit 6 selects these operation modes according to the situation, and outputs a drive signal according to the selected operation mode to the inverter circuit 2.
  • FIGS. 17 (a) and 17 (b) are diagrams showing differences in current waveforms according to the current application method.
  • FIG. 17 (a) shows an example of the waveform of the U-phase alternating current according to the PWM control method
  • FIG. 17 (b) shows an example of the waveform of the U-phase alternating current according to the PHM control method.
  • the vertical axis represents the magnitude of the current
  • the horizontal axis represents time.
  • the waveform of the U-phase alternating current by the PHM control method that is, the waveform of the alternating current flowing through the compressor motor 309 in the fast heating operation mode is the U-phase alternating current by the PWM control method
  • the waveform is a distorted waveform including more harmonic components as compared with the waveform of (1), that is, the waveform of the alternating current flowing through the compressor motor 309 in the normal operation mode.
  • the AC power supplied from the inverter circuit 2 to the compressor motor 309 in the fast heating operation mode is higher in harmonics than the AC power supplied from the inverter circuit 2 to the compressor motor 309 in the normal operation mode Contains ingredients.
  • the pulse pattern PHM1 used in the PHM control of the period D1 in the fast warm-up operation mode has a smaller number of pulses and a waveform closer to a rectangular wave as compared with the pulse pattern PHM2 used in the PHM control of the period D2.
  • it may be a square wave.
  • the maximum rotational speed can be made higher than in the case of PWM control.
  • the pulse pattern PHM2 used in PHM control in the period D2 by increasing the number of pulses, more harmonic components are removed from the AC power supplied to the compressor motor 309. Thereby, the iron loss which generate
  • pulse patterns of PHM1 and PHM2 are used to switch the order of harmonic components to be removed from the AC power supplied to the compressor motor 309
  • three or more pulse patterns are used. May be used. In that case, the difference between the set temperature and the room temperature decreases, and accordingly, as the motor rotation speed decreases, harmonic components of more orders are removed in the AC power supplied to the compressor motor 309. It is preferable to change the pulse pattern of PHM control, that is, the phase position of the AC power conducted by each switching element of the inverter circuit 2.
  • the first pulse modulator 64 generates a pulse signal of PHM described above
  • the second pulse modulator 65 generates a pulse signal of PWM described above.
  • the first pulse modulator 64 and the second pulse modulator 65 according to the present embodiment are not limited thereto, and the harmonics of the three-phase alternating current in the fast warming-up mode shown in FIG. It is controlled to generate more than the harmonics of alternating current.
  • the first pulse modulator 64 may use a trapezoidal wave overmodulation control method, a control method for reducing the PWM carrier frequency, or the like. It is conceivable to switch the method of energization such as energization.
  • PWM control method between the first pulse modulator 64 and the second pulse modulator 65, PWM control method, PHM control method, trapezoidal modulation type over modulation control method, control method to lower the PWM carrier frequency, energization such as 120 degree conduction, etc.
  • the methods may be combined so that the rapid warm-up operation mode generates more harmonics than the normal operation mode.
  • FIG. 18 shows an example of changes in room temperature and the amount of heat generated when the air conditioner 300 performs a defrosting operation.
  • the horizontal axis represents the passage of time
  • the vertical axis represents the room temperature and the amount of heat generated.
  • an example of the change in room temperature is indicated by a solid line
  • a change in the amount of heat generated is indicated by a broken line.
  • the air conditioner 300 When the air conditioner 300 is heated when the outside air temperature is low, such as in winter, moisture in the air adheres to the heat exchanger 302 of the outdoor unit to form frost. As the adhesion of the frost progresses, the heat exchange performance of the heat exchanger 302 decreases. As a result, as shown in FIG. 18, the amount of heat generated gradually decreases between time t0 and time t1, and along with it, the room temperature once raised also gradually decreases. Therefore, when the heat exchange performance of the heat exchanger 302 is degraded to some extent, the air conditioner 300 starts the defrosting operation at time t1.
  • the air conditioner 300 switches the circulation direction of the refrigerant by the four-way valve 310 in the reverse direction to that before, that is, in the same direction as the cooling operation.
  • the heat exchanger 302 of the outdoor unit is warmed to melt the adhering frost.
  • FIG. 19 (a) and 19 (b) are diagrams showing the operation of the refrigeration cycle in the heating operation, the cooling operation, and the defrosting operation.
  • FIG. 19A in the heating operation, the refrigerant compressed by the compressor 308 is sent to the heat exchanger 302 of the indoor unit via the four-way valve 310, and then the heat exchanger 306 of the outdoor unit It returns to the compressor 308 through the four-way valve 310.
  • FIG. 19B during the cooling operation and the defrosting operation, the refrigerant compressed by the compressor 308 is sent to the heat exchanger 306 of the outdoor unit via the four-way valve 310, and then the indoor unit Through the heat exchanger 302 and the four-way valve 310 to the compressor 308.
  • a bypass valve is provided in front of the heat exchanger 302 of the indoor unit so that the refrigerant is returned to the compressor 308 through the bypass valve during the defrosting operation.
  • the cold refrigerant that has been dissipated by the heat exchanger 306 may not pass through the heat exchanger 302 of the indoor unit.
  • the air conditioner 300 After the defrosting operation is started at time t1, when a predetermined defrosting period elapses as shown in FIG. 18, the air conditioner 300 stops the defrosting operation at time t2 and restarts the heating operation. At this time, the air conditioner 300 returns the circulation direction of the refrigerant switched by the four-way valve 310 to the original, and blows the warm air from the indoor unit. Thereafter, the switching between the defrosting operation and the heating operation is repeated in the same manner.
  • the length of the defrosting period from time t1 to t2 may be set in advance, or may be determined from the adhesion state of frost or the like. In this defrosting period, as shown in FIG. 18, the amount of generated heat becomes zero and the room temperature decreases. When the heating operation is restarted at time t2 after the defrosting period has elapsed, the amount of generated heat increases, and the room temperature also increases accordingly.
  • FIG. 20 shows an example of changes in the number of rotations of the compressor motor 309 and the d-axis current during the defrosting period and the heating period.
  • the operation mode in the defrosting period is referred to as a defrosting operation mode.
  • the horizontal axis represents the passage of time
  • the vertical axis represents the motor rotational speed and the d-axis current.
  • a change example of the motor rotational speed is indicated by a broken line
  • a change example of the d-axis current is indicated by a solid line.
  • the air conditioner 300 starts the defrosting operation mode at time t1
  • the motor rotational speed starts to increase and reaches the maximum rotational speed at time t2.
  • the defrosting operation mode is stopped at time t3.
  • the d-axis current which is a reactive current
  • the compressor motor 309 flows in the field-weakening direction to the negative side, ie, the compressor motor 309, according to the motor rotational speed.
  • the copper loss generated in the compressor motor 309 is further increased.
  • the amount of heat generation of the compressor motor 309 itself is further increased to increase the amount of heat absorbed by the refrigerant flowing in the compressor 308, thereby increasing the amount of heat release in the heat exchanger 306 of the outdoor unit. ing.
  • the defrosting ability can be improved.
  • the compressor motor 309 can be rotated at higher speed by field weakening.
  • the motor rotation number reaches the maximum rotation number at time t2 and is maintained until time t3 when the defrosting period ends. In this period, energization by PHM control is performed.
  • the PHM pulse signal used here is the above-mentioned pulse pattern PHM1, which has a small number of pulses and a waveform close to a rectangular wave. As a result, iron loss is generated in the compressor motor 309 so that the compressor motor 309 generates heat.
  • the pulse waveform used here is not limited to the pulse pattern PHM1 and may be another pulse waveform or a rectangular wave.
  • the switch 68 selects the PHM pulse signal output from the first pulse modulator 64 for PHM control, and outputs it to the inverter circuit 2.
  • the motor rotation number and the d-axis current are set to 0 until time t4, and then the compressor motor 309 is stopped, and then the heating period is started.
  • the quick warm-up operation mode and the normal operation mode are switched and used halfway. That is, in the period from time t4 to time t5, the fast warming-up mode is selected, and PWM control, PHM control using the pulse pattern PHM1, and PHM control using the pulse pattern PHM2 are switched at predetermined timings. Also, between time t5 and time t6 when the defrosting operation is started next, the normal operation mode is selected to perform PHM control.
  • the d-axis current is supplied to the compressor motor 309 as in the defrosting operation mode to increase the copper loss generated in the compressor motor 309.
  • the amount of heat generated by the compressor motor 309 itself is further increased to increase the amount of heat absorbed by the refrigerant flowing in the compressor 308, and the amount of heat released in the heat exchanger 302 of the indoor unit is increased. I try to increase it. As a result, the heating capacity can be further improved.
  • the air conditioner 300 is operated in the defrosting operation mode with PHM control in the defrosting period, and the air conditioner 300 is switched between the fast heating operation mode with PHM control and the normal operation mode with PWM control in the heating period.
  • the example which operates is demonstrated, you may make it perform only any one. That is, while the air conditioner 300 is operated in the defrosting operation mode by PHM control in the defrosting period, the air conditioner 300 may be operated using conventional PWM control in the heating period. Alternatively, while the air conditioner 300 is operated in the defrosting operation mode by PHM control in the defrosting period, the air conditioner 300 may be operated using the conventional PWM control in the heating period.
  • FIG. 21 is a diagram showing an example of the relationship between the outside air temperature and the motor rotation speed and the control method when the control method of the air conditioner 300 is switched according to the outside air temperature and the motor rotation speed.
  • PWM control is performed when the motor rotation speed is less than 4000 rpm
  • PHM control is performed when the motor rotation speed is 4000 rpm or more.
  • PHM control using the pulse pattern PHM1 is performed when the temperature is lower than the predetermined air temperature to increase harmonic components of AC power.
  • PHM control using pulse pattern PHM2 is performed to reduce the harmonic component of AC power.
  • a pulse pattern that reduces harmonic components contained in AC power more than the above PHM1 and PHM2 Perform PHM control using (referred to as PHM3).
  • the switching of the control method as shown in FIG. 21 is merely an example, and the switching condition in the case of switching the control method of the air conditioner 300 according to the outside air temperature and the motor rotational speed is not limited to this. .
  • the control circuit 6 selects the PWM pulse signal or the PHM pulse signal by the switch 68 in accordance with the rotational speed of the compressor motor 309, thereby achieving the PWM control method (PWM control mode) and Switch between PHM control method (PHM control mode) and use.
  • FIG. 22 shows how the control circuit 6 switches control modes.
  • the rotational speed at which the control mode is switched can be arbitrarily changed.
  • the control shifts to PWM control as the rotational speed of the compressor motor 309 increases.
  • the switching operation of the switching element of the inverter circuit 2 is controlled by the PWM control method.
  • PHM control has a problem in controllability when the compressor motor 309 is in a stopped state or an extremely low speed state, and distortion of the AC power waveform tends to be large. Therefore, such a defect can be compensated by combining with the control by the PWM control method.
  • the rotational speed of the compressor motor 309 for switching the control by the PWM method and the PHM control is not particularly limited.
  • a state of 700 rpm or less is controlled by the PWM method, and the PHM control is performed at a rotational speed higher than 700 rpm.
  • the range of 1500 rpm to 5000 rpm is an operation range very suitable for control of the PHM method. In this range, the control of the PHM method has greater effect of reducing the switching loss of the switching element than the control of the PWM method.
  • This operating area is an operating area often used in the air conditioner 300. That is, the control of the PHM system exerts a great effect in the driving area closely attached to life.
  • FIG. 23 shows how the switch 68 switches between the PWM control mode and the PHM control mode in the control circuit 6 in accordance with the motor rotation speed.
  • the line voltage pulse waveform when the control mode is switched from the PWM control mode to the PHM control mode by switching the selection destination of the switch 68 from the PWM pulse signal to the PHM pulse signal when ⁇ uvl ⁇ .
  • An example is shown.
  • FIG. 24 shows an example of the appearance when the control circuit 6 is configured by a HIC (Hybrid Integrated Circuit).
  • HIC Hybrid Integrated Circuit
  • FIG. 25 shows an example of the appearance when the control circuit 6 and the inverter circuit 2 are respectively modularized and combined.
  • the present invention is not limited to the structure or the appearance of the control circuit 6 and the inverter circuit 2 or to the above, and may have any structure or the appearance.
  • the inverter circuit 2 of the motor control device 311 in the outdoor unit housing 305 is controlled by the PWM control method, control of the switching element is performed based on the carrier wave shown in FIG.
  • the resonant frequency of the outdoor unit housing 305, the compressor 308, or the heat exchanger 306 substantially matches the frequency of the carrier wave, very large noise may be generated. Therefore, when the PHM control method is used and the carrier wave of the carrier wave generator shown in FIG. 30 is not output, the noise from the outdoor unit can be suppressed.
  • the control circuit 6 selects one of the fast heating operation mode for quick heating and the normal operation mode by the switch 68, and drives according to the selected operation mode A signal is output to inverter circuit 2.
  • the AC power supplied to the compressor motor 309 in the fast heating operation mode includes harmonic components more than the AC power supplied to the compressor motor 309 in the normal operation mode. Since this is done, more iron loss can be generated in the compressor motor 309 in the rapid warming-up operation mode, and the compressor motor 309 can generate heat. Therefore, the refrigerant can be heated even during operation of the compressor 308 without adding a special device such as an electric heater. As a result, the room temperature can be raised quickly.
  • the control circuit 6 selects the fast heating operation mode, and thereafter, the difference between the predetermined set temperature and the room temperature is in the predetermined range Select the normal operation mode when it becomes inside. Since this is done, it is possible to switch between the fast warm-up operation mode and the normal operation mode at an appropriate timing.
  • the control circuit 6 When the fast warm-up operation mode is selected, the control circuit 6 performs PHM control to obtain the phase position of AC power to which the switching element of the inverter circuit 2 is conductive, and the drive signal based on the obtained phase position. Output On the other hand, when the normal operation mode is selected, the control circuit 6 outputs a drive signal based on PWM control. Since this is done, it is possible to output an optimal drive signal from the control circuit 6 in each of the fast warm-up operation mode and the normal operation mode.
  • the control circuit 6 switches the pulse pattern from PHM1 to PHM2 based on the difference between the predetermined set temperature and room temperature, whereby the switching elements of the inverter circuit 2 become conductive.
  • the phase position of the AC power is changed to switch the order of harmonic components to be removed in the AC power supplied to the compressor motor 309.
  • the switching elements of the inverter circuit 2 conduct such that harmonic components of more orders are removed in the AC power supplied to the compressor motor 309 as the difference between the set temperature and the room temperature becomes smaller. Change the phase position of the alternating current power. In this manner, the harmonic content of the AC power is adjusted according to the difference between the set temperature and the room temperature, so that the optimum AC power is supplied according to the operating state of the compressor motor 309. Can.
  • the reactive current flowing through the compressor motor 309 in the fast warm-up operation mode that is, the current value of the d-axis current is larger than that flowing through the compressor motor 309 in the normal operation mode. Since this is done, it is possible to increase the copper loss generated by the compressor motor 309 in the high-speed heating operation mode, and to further increase the calorific value of the compressor motor 309. As a result, the heating capacity of the air conditioner 300 can be further improved.
  • the reactive current in the high-speed heating operation mode flows in the field weakening direction with respect to the compressor motor 309. As a result, the compressor motor 309 can be rotated at a higher speed.
  • the control circuit 6 uses the switch 68 to select the defrosting operation mode for defrosting the heat exchanger 306 of the outdoor unit.
  • the defrosting operation mode is selected by the control circuit 6, the four-way valve 310 switches the circulation direction of the refrigerant in the opposite direction to the fast heating operation mode or the normal operation mode.
  • the AC power supplied to the compressor motor 309 in the defrosting operation mode includes harmonic components more than the AC power supplied to the compressor motor 309 in the normal operation mode. Since this is done, even in the defrosting operation mode, a large amount of iron loss can be generated by the compressor motor 309, and the compressor motor 309 can generate heat. Therefore, the refrigerant can be heated even during operation of the compressor 308 without adding a special device such as an electric heater. As a result, the defrosting can be performed quickly, and the defrosting period can be shortened to suppress a decrease in room temperature.
  • the control circuit 6 When the defrosting operation mode is selected, the control circuit 6 performs PHM control to obtain the phase position of AC power to which the switching element of the inverter circuit 2 is conductive, and the drive signal is calculated based on the obtained phase position. Output. On the other hand, when the normal operation mode is selected, the control circuit 6 outputs a drive signal based on PWM control. Since this is done, an optimal drive signal can be output from the control circuit 6 in each of the defrosting operation mode and the normal operation mode.
  • the reactive current flowing through the compressor motor 309 in the defrosting operation mode that is, the current value of the d-axis current is larger than that flowing through the compressor motor 309 in the normal operation mode. Since this is done, the copper loss generated by the compressor motor 309 in the defrosting operation mode can be increased, and the amount of heat generation of the compressor motor 309 can be further increased. As a result, the defrosting capability of the air conditioner 300 can be further improved.
  • FIG. 26 is a diagram showing the configuration of a heat pump type hot water supply system 400 according to an embodiment of the present invention.
  • the hot water supply system 400 includes an outdoor unit 401, a hot water storage tank 402, a heat exchanger 403, a fan 404, a motor control device 405, a compressor motor 406, a compressor 407, a refrigerant pipe 408, a water pipe 409, a heat exchanger 410 and an input.
  • a circuit 411 is provided.
  • the compressor 407 is driven by a compressor motor 406 to compress the refrigerant.
  • the operation of the compressor motor 406 is controlled by a motor controller 405.
  • the refrigerant compressed by the compressor 407 is in a high temperature and high pressure state, and is sent to the heat exchanger 410 through the refrigerant pipe 408.
  • a water pipe 409 for passing water obtained from the water supply port is provided in the vicinity of the refrigerant pipe 408.
  • the heat stored in the refrigerant is dissipated in the heat exchanger 410, whereby heat exchange is performed between the refrigerant and the water, and the water in the water pipe 409 is warmed.
  • the water thus warmed is stored in the hot water storage tank 402, and supplied from the hot water supply port to each facility (bath, faucet, floor heating panel, etc.) in the building where the hot water supply system 400 is installed, if necessary. .
  • the refrigerant that has become a liquid due to the heat radiation is sent to the heat exchanger 403, and after absorbing the heat of vaporization from the outside air in the heat exchanger 403, it turns into a gas and returns to the compressor 407.
  • the coolant is circulated between the heat exchanger 403 and the heat exchanger 410, whereby the water in the hot water supply system 400 is warmed.
  • the input circuit 411 calculates the rotational speed of the compressor motor 309 based on information such as the outside air temperature, the water temperature in the hot water storage tank 402, and the current time, when a predetermined operation condition is satisfied. Then, a speed command corresponding to the calculated rotational speed is transmitted to the motor control device 405.
  • the motor control device 405 has the same configuration as the motor control device 311 of FIG. 2 described in the first embodiment, and controls the operation of the compressor motor 406 in the same manner. Accordingly, a description of motor controller 405 is provided below with reference to FIGS.
  • symbol of a motor control apparatus is replaced with 311 to 405 in FIG. 2, and the code of the motor for compressors is replaced with 309 to 406, respectively.
  • the motor control device 405 generates a PHM pulse signal and a PWM pulse signal by the first pulse modulator 64 and the second pulse modulator 65, respectively.
  • the switch 68 selects one of the pulse signals based on the rotational speed (rotational speed) of the compressor motor 406, and outputs the pulse signal to the inverter circuit 2 as a drive signal.
  • the inverter circuit 2 operates the internal switching elements in accordance with the drive signal to supply AC power to the compressor motor 406 to drive the compressor motor 406.
  • FIG. 27 shows an example of how the number of revolutions of the compressor motor 406 and the temperature of the water in the hot water supply system 400 change.
  • the horizontal axis represents the passage of time
  • the vertical axis represents the motor rotational speed and the water temperature.
  • the example of change of motor rotation speed by PWM control is shown as motor rotation speed A
  • the example of change of motor rotation speed when PWM control and PHM control are used together as motor rotation speed B is shown by a broken line, respectively.
  • a solid line indicates an example of change of the water temperature by PWM control as the water temperature A
  • the motor rotational speed B increases until it reaches the maximum rotational speed.
  • the maximum rotation speed at this time is higher than that of the above-mentioned motor rotation speed A. Then, after a while, the water temperature B gradually rises.
  • PWM control and PHM control as described above are used in combination, as indicated by reference numeral 272 in FIG. 27, PWM control is performed during a period from when the operation is started until the motor rotational speed B reaches a predetermined rotational speed. Energization is performed from the inverter circuit 2 to the compressor motor 406. This is because it is difficult to apply PHM control when the motor rotational speed is low and the energization ratio is small. At this time, in the control circuit 6, the switch 68 selects the PWM pulse signal output from the second pulse modulator 65 for PWM control, and outputs it to the inverter circuit 2.
  • the switch 68 selects the PHM pulse signal output from the first pulse modulator 64 for PHM control, and outputs it to the inverter circuit 2.
  • the switch 68 selects the PWM pulse signal output from the second pulse modulator 65 for PWM control, and outputs it to the inverter circuit 2.
  • the PWM control and the PHM control are used in combination from the start of the operation to the time t3 '.
  • Such an operation mode is hereinafter referred to as a rapid hot water supply operation mode.
  • the operation is performed using only PWM control as in the conventional case.
  • Such an operation mode is hereinafter referred to as a normal operation mode.
  • the control circuit 6 selects these operation modes according to the situation, and outputs a drive signal according to the selected operation mode to the inverter circuit 2.
  • the AC power supplied from the inverter circuit 2 to the compressor motor 406 in the rapid hot water supply operation mode is the inverter circuit 2 in the normal operation mode.
  • the maximum rotation speed B can be made higher than the maximum rotation speed A by PWM control. Furthermore, by performing PHM control using the pulse pattern PHM2 when the motor rotational speed is lower than the maximum rotational speed B, it is possible to reduce the iron loss generated in the compressor motor 406 and achieve an operation state of high efficiency. .
  • three or more types of pulse patterns may be used as in the air conditioner 300 according to the first embodiment.
  • the difference between the set water temperature and the water temperature decreases, and accordingly, as the motor rotation speed decreases, harmonic components of more orders are removed in the AC power supplied to the compressor motor 406.
  • the pulse pattern of PHM control that is, the phase position of the AC power conducted by each switching element of the inverter circuit 2.
  • FIG. 28 is a diagram showing an example of the relationship between the outside air temperature and the water temperature and the control method when the control method of the hot water supply system 400 is switched according to the outside air temperature and the water temperature.
  • PWM control is performed when the outside air temperature is relatively high (about 30 ° C.) or the water temperature is relatively high (about 80 ° C.).
  • PHM control is performed when the outside air temperature or the water temperature is lower than this.
  • the pulse patterns PHM3, PHM2, and PHM1 are sequentially selected in such a manner that the AC power supplied to the compressor motor 406 includes harmonic components of more orders as the outside air temperature or the water temperature decreases.
  • the d-axis current is supplied to the compressor motor 406 as described above, and the compressor motor 406 Increase the copper loss that occurs in As a result, the amount of heat generation of the compressor motor 406 is further increased, the amount of heat absorbed by the refrigerant flowing in the compressor 407 is increased, and the amount of heat release in the heat exchanger 410 is increased. As a result, the hot water supply capacity can be further improved.
  • FIG. 29 is a diagram showing an example of the relationship between the time and the water temperature and the control method when the control method of the hot water supply system 400 is switched according to the time and the water temperature.
  • PWM control is performed in the daytime or evening time zone where the outside air temperature is relatively high, or when the water temperature is relatively high (about 60 ° C.).
  • PHM control is performed when the water temperature is lower than this during the nighttime or early morning time zone where the outside air temperature is relatively low.
  • the pulse patterns PHM2 and PHM1 are selected in this order so that the AC power supplied to the compressor motor 406 includes harmonic components of more orders.
  • the d-axis current is supplied to the compressor motor 406 and copper loss generated in the compressor motor 406 To increase the calorific value.
  • zone changes a lot with seasons, it is preferable to change the conditions of FIG. 29 for every season.
  • the switching of the control method as shown in FIGS. 28 and 29 is merely an example, and the switching condition in the case of switching the control method of the hot water supply system 400 according to the outside air temperature and water temperature or time and water temperature is limited to this. It is not something to be done.
  • the control circuit 6 selects one of the operation mode of the rapid hot water supply operation mode and the normal operation mode for rapidly heating water by the switch 68, and drives the drive signal corresponding to the selected operation mode as an inverter Output to circuit 2
  • the AC power supplied to the compressor motor 406 in the rapid hot water supply operation mode includes harmonic components more than the AC power supplied to the compressor motor 406 in the normal operation mode. Since this is done, more iron loss can be generated in the compressor motor 406 in the rapid hot water supply operation mode, and the compressor motor 406 can generate heat. Therefore, the refrigerant can be heated even during operation of the compressor 407 without adding a special device such as an electric heater. As a result, the water temperature can be raised quickly. Furthermore, since the capacity of the hot water storage tank 402 can be reduced by this, the installation area, the installation cost, and the product cost can be reduced, and the user can always use fresh hot water.
  • control circuit 6 selects one of the rapid hot water supply operation mode and the normal operation mode based on at least one of the water temperature, the outside air temperature, and the time. Since this is done, it is possible to switch between the rapid hot water supply operation mode and the normal operation mode at an appropriate timing.
  • the control circuit 6 When the rapid hot water supply operation mode is selected, the control circuit 6 performs PHM control to obtain the phase position of AC power to which the switching element of the inverter circuit 2 conducts, and based on the obtained phase position, the drive signal Output On the other hand, when the normal operation mode is selected, the control circuit 6 outputs a drive signal based on PWM control. Since this is done, an optimal drive signal can be output from the control circuit 6 in each of the rapid hot water supply operation mode and the normal operation mode.
  • control circuit 6 is based on PWM control. Output a drive signal. Since this is done, in a state where application of PHM control is difficult because the motor rotational speed is low and the electrification rate is small, it is possible to reliably control the compressor motor 406 using PWM control.
  • the control circuit 6 switches the pulse pattern between PHM1, PHM2 and PHM3 based on at least one of the water temperature, the outside air temperature and the time, thereby the inverter circuit
  • the phase position of AC power conducted by the two switching elements is changed to switch the order of harmonic components to be removed in the AC power supplied to the compressor motor 406.
  • the switching element of inverter circuit 2 conducts such that harmonic components of more orders are removed in the AC power supplied to compressor motor 406 as the temperature of water or the outside air temperature rises. Change the phase position of AC power. As described above, since the content ratio of harmonics in AC power is adjusted, it is possible to supply optimal AC power in accordance with the operating state of the compressor motor 406.
  • the control circuit 6 outputs a drive signal so that a predetermined reactive current, that is, d-axis current flows to the compressor motor 406 in the rapid hot water supply operation mode.
  • a predetermined reactive current that is, d-axis current flows to the compressor motor 406 in the rapid hot water supply operation mode.
  • the temperature of water is about 30 ° C.
  • the reactive current is caused to flow through the compressor motor 406 in the rapid hot water supply operation mode. Since this is done, the copper loss generated by the compressor motor 406 in the rapid hot water supply operation mode can be increased, and the amount of heat generation of the compressor motor 406 can be further increased. As a result, the hot water supply capacity of the hot water supply system 400 can be further improved.
  • the outdoor unit housing 305 includes an outdoor heat exchanger 306 installed outdoors, a compressor 308 for compressing a refrigerant, and a compressor motor 309 for driving the compressor 308. And a motor control device 311 which receives direct current power and converts it into alternating current power to be supplied to the compressor motor 309.
  • the motor control device 311 uses a PWM control method of controlling conduction or cutoff of the switching element using a carrier wave of a constant frequency, the switching cycle of the switching element also becomes constant. Therefore, if the state where the switching frequency of the motor control device 311 matches the resonance frequency of the compressor or the outdoor unit casing continues for a long time, vibration due to resonance occurs and noise is generated from the outdoor unit.
  • a control method in which a carrier wave of a constant frequency is not used in one or both of the first pulse modulator 64 and the second pulse modulator 65 using the rotational speed command f1 * of FIG. It is adopted.
  • a control method for example, a phase position signal corresponding to a predetermined phase position in the phase of AC power output from motor control device 311 to compressor motor 309 is calculated, and switching on or off of switching elements based on the phase position signal.
  • the rectangular wave control method or the PHM control method described above is used.
  • the switching cycle of the switching element can be varied according to the frequency of the AC power output to the compressor motor 309, and the resonance of the compressor due to the switching cycle and the resonance of the outdoor unit due to the switching cycle can be suppressed. .
  • the noise of the air conditioner can be suppressed.
  • switching is performed by calculating the predetermined phase position suppressing harmonic components superimposed on AC power, and controlling conduction or cutoff of the switching element based on the phase position signal. Distortion of AC power can be suppressed while reducing the number of times of conduction or interruption of the element, and deterioration of controllability of the motor can be suppressed while reducing switching loss.
  • the order of harmonic components to be suppressed is determined according to the rotational speed of the compressor motor 309. . Specifically, when the rotational speed of the compressor motor 309 is in a second rotational speed range smaller than the first rotational speed range, the motor control device 311 generates more orders than the first rotational speed range. The predetermined phase position which suppresses the harmonic component of is calculated, and the conduction or blocking of the switching element is controlled based on this phase position signal. Thereby, distortion of AC power output to compressor motor 309 can be suppressed, and noise of compressor motor 309 due to distortion of AC power can be suppressed.
  • the outdoor unit 401 has a housing, and the housing drives the heat exchanger 403, the compressor 407 for compressing the refrigerant, and the compressor 407.
  • a compressor motor 406 and a motor control device 405 for receiving DC power and converting it to AC power to be supplied to the compressor motor 406 are accommodated. Therefore, when the motor control device 311 uses a carrier wave of a constant frequency, there is a possibility that the noise described above is generated. Therefore, by using a control method that does not use the above-described carrier wave of a constant frequency, noise due to resonance between the carrier wave and the device in the outdoor unit 401 can be suppressed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Inverter Devices (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

L'invention porte sur un climatiseur, qui comporte : un échangeur de chaleur intérieur; un échangeur de chaleur extérieur; un compresseur pour comprimer un réfrigérant circulant entre l'échangeur de chaleur intérieur et l'échangeur de chaleur extérieur; un moteur pour entraîner le compresseur; un circuit d'onduleur pour générer une alimentation en courant alternatif, qui est fournie au moteur, à partir d'une alimentation en courant continu à l'aide d'un élément de commutation; et un circuit de commande pour délivrer en sortie au circuit d'onduleur un signal de commande pour commander le fonctionnement de l'élément de commutation. Le circuit de commande sélectionne l'un quelconque des modes de fonctionnement, comprenant au moins un mode de fonctionnement à chauffage rapide pour un chauffage rapide et un mode de fonctionnement normal, et délivre en sortie au circuit d'onduleur un signal de commande correspondant au mode de fonctionnement sélectionné. Une alimentation en courant alternatif fournie dans le mode de fonctionnement à chauffage rapide au moteur contient davantage de composantes haute fréquence qu'une alimentation en courant alternatif délivrée dans le mode de fonctionnement normal au moteur.
PCT/JP2010/072394 2010-12-13 2010-12-13 Climatiseur et dispositif d'alimentation en eau chaude WO2012081078A1 (fr)

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JP2012548559A JP5531112B2 (ja) 2010-12-13 2010-12-13 空気調和機、給湯システム
PCT/JP2010/072394 WO2012081078A1 (fr) 2010-12-13 2010-12-13 Climatiseur et dispositif d'alimentation en eau chaude

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WO2014188566A1 (fr) * 2013-05-23 2014-11-27 三菱電機株式会社 Dispositif de pompe à chaleur, et climatiseur, chauffe-eau à pompe à chaleur, réfrigérateur, et congélateur le comprenant
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CN106052041A (zh) * 2016-07-13 2016-10-26 青岛海尔空调器有限总公司 空调制冷控制方法和控制装置
CN107388490A (zh) * 2017-07-12 2017-11-24 青岛海尔空调器有限总公司 空调运行控制方法
KR20190081837A (ko) * 2017-12-29 2019-07-09 엘지전자 주식회사 공기조화 시스템
KR20190081855A (ko) * 2017-12-29 2019-07-09 엘지전자 주식회사 공기조화 시스템
CN111237999A (zh) * 2020-02-18 2020-06-05 宁波奥克斯电气股份有限公司 一种空调器控制方法
CN114704936A (zh) * 2022-02-18 2022-07-05 青岛海尔空调器有限总公司 用于控制直流空调器的方法及装置、直流空调器

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CN110440395B (zh) * 2019-08-12 2021-07-16 宁波奥克斯电气股份有限公司 一种空调节能运行的控制方法、系统及空调

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US9772131B2 (en) 2013-05-23 2017-09-26 Mitsubishi Electric Corporation Heat pump device, and air conditioner, heat pump water heater, refrigerator, and freezing machine including heat pump device
RU2621449C2 (ru) * 2013-05-23 2017-06-06 Мицубиси Электрик Корпорейшн Устройство теплового насоса и установка для кондиционирования воздуха, водонагреватель с тепловым насосом, холодильная установка и морозильный аппарат, включающие в себя устройство теплового насоса
WO2014188566A1 (fr) * 2013-05-23 2014-11-27 三菱電機株式会社 Dispositif de pompe à chaleur, et climatiseur, chauffe-eau à pompe à chaleur, réfrigérateur, et congélateur le comprenant
JP5968531B2 (ja) * 2013-05-23 2016-08-10 三菱電機株式会社 ヒートポンプ装置ならびに、それを備えた空気調和機、ヒートポンプ給湯機、冷蔵庫、および冷凍機
AU2013390196B2 (en) * 2013-05-23 2016-09-15 Mitsubishi Electric Corporation Heat pump device, and air conditioner, heat pump water heater, refrigerator, and freezer comprising same
CN105209835A (zh) * 2013-05-23 2015-12-30 三菱电机株式会社 热泵装置及具有其的空调机、热泵式热水器、冰箱和制冷机
CN105209835B (zh) * 2013-05-23 2017-05-24 三菱电机株式会社 热泵装置及具有其的空调机、热泵式热水器、冰箱和制冷机
WO2015043276A1 (fr) * 2013-09-25 2015-04-02 珠海格力电器股份有限公司 Procédé et appareil pour commander une fréquence de travail d'un compresseur
CN106052041A (zh) * 2016-07-13 2016-10-26 青岛海尔空调器有限总公司 空调制冷控制方法和控制装置
CN106052041B (zh) * 2016-07-13 2019-10-01 青岛海尔空调器有限总公司 空调制冷控制方法和控制装置
CN107388490B (zh) * 2017-07-12 2021-05-28 青岛海尔空调器有限总公司 空调运行控制方法
CN107388490A (zh) * 2017-07-12 2017-11-24 青岛海尔空调器有限总公司 空调运行控制方法
KR20190081855A (ko) * 2017-12-29 2019-07-09 엘지전자 주식회사 공기조화 시스템
KR20190081837A (ko) * 2017-12-29 2019-07-09 엘지전자 주식회사 공기조화 시스템
KR102129078B1 (ko) * 2017-12-29 2020-07-02 엘지전자 주식회사 공기조화 시스템
KR102130437B1 (ko) * 2017-12-29 2020-07-07 엘지전자 주식회사 공기조화 시스템
CN111237999A (zh) * 2020-02-18 2020-06-05 宁波奥克斯电气股份有限公司 一种空调器控制方法
CN114704936A (zh) * 2022-02-18 2022-07-05 青岛海尔空调器有限总公司 用于控制直流空调器的方法及装置、直流空调器
CN114704936B (zh) * 2022-02-18 2024-04-09 青岛国创智能家电研究院有限公司 用于控制直流空调器的方法及装置、直流空调器

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