WO2005039037A1 - Controleur de ventilateur, systeme de cycle de refrigeration et procede pour estimer la vitesse de rotation d'un ventilateur - Google Patents

Controleur de ventilateur, systeme de cycle de refrigeration et procede pour estimer la vitesse de rotation d'un ventilateur Download PDF

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Publication number
WO2005039037A1
WO2005039037A1 PCT/JP2004/013932 JP2004013932W WO2005039037A1 WO 2005039037 A1 WO2005039037 A1 WO 2005039037A1 JP 2004013932 W JP2004013932 W JP 2004013932W WO 2005039037 A1 WO2005039037 A1 WO 2005039037A1
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WO
WIPO (PCT)
Prior art keywords
fan
switching elements
current detection
refrigeration cycle
motor
Prior art date
Application number
PCT/JP2004/013932
Other languages
English (en)
Japanese (ja)
Inventor
Takahisa Endo
Naohito Kamiya
Takayuki Kambe
Original Assignee
Toshiba Carrier Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Carrier Corporation filed Critical Toshiba Carrier Corporation
Publication of WO2005039037A1 publication Critical patent/WO2005039037A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/08—Arrangements for controlling the speed or torque of a single motor
    • H02P6/085—Arrangements for controlling the speed or torque of a single motor in a bridge configuration
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/20—Arrangements for starting
    • H02P6/21—Open loop start
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S388/00—Electricity: motor control systems
    • Y10S388/907—Specific control circuit element or device
    • Y10S388/9072—Bridge circuit

Definitions

  • Fan control device refrigeration cycle device, and fan rotation speed estimation method
  • the present invention relates to startup control of a fan that may rotate due to an external factor, and relates to a control device for the fan, a refrigeration cycle device employing the control, and a method of estimating a fan speed during control.
  • An outdoor fan or the like of an air conditioner drives a fan motor and rotates by natural wind in a state.
  • a fan drive device using a brushless DC motor has a sensor for detecting the rotational position of a rotor such as a Hall element, and detects the rotational position of the rotor based on an output signal of the sensor when the fan is started. After controlling the energization to each switching element constituting the inverter in accordance with the rotational position, stopping the fan and positioning the motor, the start is started (for example, Japanese Patent Application Publication No. 2000-125584). ) OAt this time, when the rotation speed of the fan rotating by natural wind was high, the compressor was driven without controlling the start of the fan.
  • a motor drive device for a compressor detects a current flowing through the winding of each phase, calculates a rotation speed from the current value, and estimates a rotor position to adopt a vector control for driving.
  • a driving power supply for a three-phase switching element constituting a positive-side (hereinafter, also referred to as an upper phase) arm is used as a negative-side (hereinafter, referred to as an upper-phase) driving power supply.
  • a simplified power supply circuit that drives the switching element is provided by providing a capacitor that is charged by the current that flows when the switching element that constitutes the arm is turned on. Have been.
  • the present invention has been made to solve the above problems, and an object of the present invention is to reduce the demagnetization of the permanent magnet of the motor and the motor even if the startup control is performed while the fan is rotating by natural wind.
  • An object of the present invention is to provide a fan control device and a refrigeration cycle device that can prevent destruction of a switching element on the negative side of an inverter.
  • Another object of the present invention is to provide a refrigeration cycle apparatus capable of preventing the refrigeration cycle from being overloaded when the natural wind is weakened after the air conditioning operation is started in a state where the natural wind is strong. Is to provide.
  • Still another object of the present invention is to provide a method for estimating the number of revolutions of a fan, which can estimate the number of revolutions without a rotation position detecting element.
  • the invention according to claim 1 is a sensorless motor for driving a fan, an inverter connected to a switching element power S3-phase bridge to supply three-phase AC power to the motor, and current detection means for detecting a current flowing to the motor.
  • the protection level is set lower than the current detection value of the current detection means in this on state is determined to be arm short circuit.
  • the invention according to claim 3 provides a refrigeration cycle including a compressor, an outdoor heat exchanger, and an outdoor fan for promoting heat exchange thereof, a sensorless motor for driving the outdoor fan, and a three-phase bridge comprising a switching element.
  • the inverter connected to supply three-phase AC power to the motor, current detection means for detecting the current flowing to the motor, and the three-phase switching elements forming the negative arm of the inverter at startup are turned on.
  • the current detection value of the current detection means in the state exceeds the protection level set lower than the value determined as arm short-circuit, the start of the fan is stopped by returning the three-phase switching elements to the off state. Execute the fan start control to stop the fan and the wind fan stop control to operate the compressor while the fan is stopped.
  • the invention according to claim 7 provides a three-phase component in which a switching element forms a negative arm of a three-phase bridge-connected inverter so as to supply three-phase AC power to a sensorless motor that drives a fan. And turning on the switching elements of the three phases, detecting the current flowing to the motor when the switching elements for three phases are on, and estimating the fan rotation speed based on the detected current value. Steps and
  • FIG. 1 is a diagram showing a schematic configuration of a control unit of an air conditioner as a first embodiment for implementing a fan control device, a refrigeration cycle device, and a fan rotation speed estimation method according to the present invention. .
  • FIG. 2 is a cross-sectional view showing a configuration of a main part of the outdoor unit.
  • FIG.3 is a circuit diagram partially showing the detailed configuration of the outdoor fan inverter.
  • FIG. 4 is a diagram showing a relationship between a current flowing through a winding of the motor and time to explain the operation of the first embodiment.
  • FIG. 5 is a diagram showing the relationship between the number of rotations of the motor and the current flowing through the windings, for explaining the operation of the first embodiment.
  • FIG. 6 is a time chart showing two typical control examples according to the first embodiment.
  • FIG. 7 is a flowchart showing a specific processing procedure of the MCU when executing the operation of the first embodiment.
  • FIG. 8 is a flowchart showing a specific processing procedure of an MCU constituting a control unit according to a second embodiment of the present invention.
  • FIG. 9 is a flowchart showing a specific processing procedure of an MCU constituting a control unit according to a third embodiment of the present invention.
  • FIG. 1 is a diagram showing a schematic configuration of a control unit of an air conditioner as a first embodiment for implementing a fan control device, a refrigeration cycle device, and a method of estimating a fan rotation speed according to the present invention.
  • an inverter 2 is connected to an AC power supply 1.
  • the inverter 2 rectifies and smoothes the alternating current, converts the obtained direct current into alternating current with a variable voltage and variable frequency, and outputs the converted alternating current.
  • the compressor 3 constituting the refrigeration cycle is connected.
  • the refrigeration cycle includes a compressor 3, a four-way valve 4, an outdoor heat exchanger 5, an expansion valve 6, an indoor heat exchanger 7, an outdoor fan 8, and an indoor fan 9.
  • the outdoor fan 8 includes a fan 8F and a motor 8M as described later, and includes an inverter 10 for controlling the motor 8M.
  • the inverter 10 has a current detection circuit 11 for detecting a winding current of the motor 8M.
  • a speed control circuit 12 is provided to control the speed of the indoor fan 9.
  • a control unit 13 that controls the inverters 2 and 10 described above and provides a speed command to the speed control circuit 12 is provided.
  • an abnormality display section 15 for performing the operation.
  • Control unit 13 Includes a microcomputer unit (hereinafter abbreviated as MCU), and executes arithmetic processing described later.
  • FIG. 2 is a cross-sectional view showing a configuration of a main part of the outdoor unit 17.
  • the outdoor heat exchange 5 When viewed from the front (below the drawing), the outdoor heat exchange 5 is bent at a substantially right angle on the left side and the rear side.
  • a compressor 3 is arranged on the right side, and an outdoor fan 8 that drives a fan 8F by a motor 8M is installed inside the outdoor heat exchanger 5, and sucks outside air from the directions of arrows A and B. It is configured to promote the heat exchange of the outdoor heat exchange 5 by discharging in the direction.
  • FIG. 3 is a circuit diagram partially showing the detailed configuration of the inverter 10 by blocks.
  • switching elements U, V, W, X, ⁇ , ⁇ composed of IGBTs are connected in a three-phase bridge. That is, a series connection circuit of the switching elements U and X, a series connection circuit of the switching elements V and ⁇ , and a series connection circuit of the switching elements W and ⁇ are connected in parallel, and one end thereof is connected to the positive electrode of the DC power supply 21. The other end is connected to the negative electrode of the DC power supply 21.
  • switching elements U, V, W constitute an upper phase arm
  • switching elements X, ⁇ , ⁇ constitute a lower phase arm
  • the interconnection point of the switching elements U and X, the interconnection point of the switching elements V and ⁇ , and the interconnection point of the switching elements W and ⁇ are outside the U, V, and W phases of the star-connected motor 8 ⁇ . Connected to the connecting conductor.
  • a drive circuit 22 is connected to each gate of the switching elements U, V, W.
  • a capacitor C is provided, one end of which is connected to the drive circuit 22 and the other end of which is connected to the sources (negative voltage side) of the switching elements U, V, W, respectively.
  • a negative pole is connected to the negative pole of the DC power supply 21 and a positive pole is connected to one end of the capacitor C via a diode D for preventing backflow. Being done.
  • the drive circuit 22 is also connected to each gate of the switching elements X, ⁇ , ⁇ .
  • a resistor R is connected between the sources of the switching elements X, ⁇ , and Z and the negative electrode of the DC power supply 21.
  • Operational amplifiers 23 are provided to amplify voltages generated on the switching elements X, ⁇ , and Z, respectively. These three resistors R and three operational amplifiers 23 constitute the above-described current detection circuit 11.
  • the control unit 13 includes an EEPROM 24 that stores a protection level Is, which is a control stop level, a repetition period Tv, and the like, which will be described later, and the switching elements U, V, W, X, and
  • the drive circuit 22 of (1) and (2) is provided with an MCU 25 for applying an on / off control signal to the inverter 2, the speed control circuit 12, and the abnormality display unit 15 shown in FIG.
  • the switching element in the lower phase of the inverter is turned on for a predetermined time T1.
  • T1 the winding current of each phase changes as shown by a solid line al in FIG. 4 or a dashed line a2 saturated in the middle.
  • the lower-phase switching element is turned on, one of the corresponding upper-phase switching elements is short-circuited and the change in the current value when the arm is short-circuited. Shown in b.
  • the rate of increase (slope) of the current value increases in the same manner because it is determined by the inductance of the motor winding, but the rotation speed is low and the induced voltage is small. In such a case, the increase of the current is stopped at an early stage, and the value is maintained. At higher speeds, the current continues to increase and eventually reaches a higher value. Therefore, after a certain period of time, the current fan speed can be used to estimate the rotational speed of the outdoor fan at that time.
  • the permanent magnet of the rotor may be demagnetized at time T1. Also, the switching element may be destroyed by the overcurrent. Therefore, if the current value at the level at which the permanent magnet of the rotor is demagnetized or the overcurrent value at which the switching element breaks down is lower than the lower value of the slip force, and the protection level Is is reached, at that point The switching element in the lower phase is returned to the off state to prevent demagnetization and element destruction.
  • the switching element of the lower phase is turned off at the time t.
  • the protection level Is is reached first.
  • the arm The switching elements X, Y, and Z are turned off in response to the short-circuit current lb.
  • the rotational speed of the outdoor fan capable of performing the air-conditioning operation varies depending on its characteristics and the configuration of the refrigeration cycle of the air conditioner. Generally, in FIG. 5, the natural speed of the fan capable of performing the air-conditioning operation without driving the fan is shown.
  • the motor current value at the above-described time T1 corresponding to the lower limit value R of the rotation speed due to the wind is lower than the current value leading to element destruction and the current value leading to demagnetization.
  • the switching element of the lower phase is turned on at every predetermined repetition cycle Tv to check whether the rotational speed of the outdoor fan has decreased. It is repeatedly determined whether or not it is. In this case, if the number of rotations of the outdoor fan due to natural winds decreases, the current value in the ON state of the lower-phase switching element becomes lower than the protection level Is even after time T1, so that the outdoor The startup of the fan is not stopped, the forced stop for the fan positioning is performed, and then the PWM drive is started.
  • the protection level Is when applied to an outdoor fan of an air conditioner, the protection level Is is a value corresponding to the natural rotation speed of a fan that can be air-conditioned without driving the fan. Is set. When applied to other fans, the protection level Is is set to the difference between the current value leading to element destruction and the current value leading to demagnetization, or a low value.
  • FIGS. 1 to 3 The embodiment shown in FIGS. 1 to 3 is configured according to the above principle, and its operation will be described below.
  • an infrared signal such as an operation mode, a set temperature, and an air volume
  • the infrared signal is received by the light receiving unit 14 and applied to the control unit 13.
  • the control unit 13 detects the rotation state of the outdoor fan 8 before executing the control according to the received signal, so that the lower-phase switching elements X, Y, Z for a predetermined time T1. Is turned on.
  • the MCU 25 checks whether or not the current detection value I exceeds a threshold lb for judging an arm short circuit. , Z are returned to the OFF state, and the abnormality display section 15 indicates that one or more of the upper-phase switching elements U, V, W is abnormal, and stops the air conditioning operation. If the current detection value I is equal to or less than the threshold lb for judging an arm short circuit, it is checked whether or not the current detection value I exceeds the protection level Is. If the current detection value I exceeds the protection level Is, the lower-phase switching elements X, ⁇ , Z is returned to the off state, and the operation of the refrigeration cycle is started.
  • the current detection value I is equal to or smaller than the threshold lb for judging an arm short, it is checked whether the current detection value I is a sine wave or 0 for all three phases. Or, if it is not 0, the lower phase switching elements X, Y, and Z are returned to the off state to indicate the force with a short circuit in the winding of the motor or the abnormality in the current detection circuit 11 in the abnormality display section. Displayed at 15 stops the air conditioning operation.
  • the lower phase is reached at time T1.
  • the switching elements X, Y, and Z are returned to the off state, and then the upper-phase switching elements U, V, and W are turned on.
  • the switching element U, V, W of the upper phase is returned to the off state if it exceeds, and one or more of the switching elements X, ⁇ , Z of the lower phase are displayed on the abnormality display section 15.
  • the abnormality is displayed and the air conditioning operation is stopped. If the current detection value I is equal to or less than the threshold lb for judging the arm short circuit, the switching elements U, V, W Is returned to the off state, and the operation of the refrigeration cycle is started.
  • the four-way valve 4 is turned on or off in accordance with the operation mode, and a frequency command for controlling the capacity of the compressor 3 is applied to the inverter 2 in accordance with the air-conditioning load.
  • the refrigerant flows through the path of the compressor 3, the four-way valve 4, the outdoor heat exchanger 5, the expansion valve 6, the indoor heat exchanger 7, the four-way valve 4, and the compressor 3.
  • the switching elements U, V, W, X, ⁇ , and Z of the inverter 10 are turned on and off in a predetermined order, but the lower-phase switching elements X, Y, and Z are controlled.
  • the upper-phase switching elements U, V, W in series connection are turned off, and the capacitor C provided corresponding to the off-state switching elements U, V, W
  • the drive circuit 22 is charged up and supplies drive power for the drive circuit 22.
  • FIG. 6 is a time chart showing two typical control examples according to the present embodiment.
  • FIG. 6 (a) shows the current when the lower-phase switching elements X, ⁇ , and Z are turned on. The detected value I is lower than the protection level Is.
  • Figure 6 (b) shows that the current detection value I when the lower-phase switching elements X, ⁇ , and Z are turned on exceeds the protection level Is. The case is shown.
  • the lower-phase switching elements X, Y, and Z are turned on, and the current when the time T1 has elapsed is passed. If the detected value I is equal to or lower than the protection level Is, the lower-phase switching elements X, ⁇ , and Z are turned off at the time and the upper-phase switching elements U, V, and W are turned on, and the current is turned on. If the detected current value I is not equal to the threshold lb for judging the arm short circuit, the deceleration and stop control of the outdoor fan 8 is executed when the time T1 has elapsed, and the output is stopped when the outdoor fan 8 stops.
  • the drive control of the outdoor fan 8 is performed by controlling the barter 10 and supplying a PWM current to the motor 8M.
  • the lower-phase switching elements X, Y, and Z are turned on after the control unit 13 starts its operation, and the current is If the detected value I exceeds the protection level Is, the stop control of the outdoor fan 8 is executed at that time, and when the control unit 13 starts the operation and the repetition period Tv elapses. If the current detection value I is equal to or lower than the protection level Is, the driving control of the outdoor fan 8 is executed in the same manner as described with reference to FIG.
  • FIG. 7 is a flowchart showing a specific processing procedure of the MCU 25 when executing the above-described operation, and the processing will be described below.
  • step 31 the data lb, Is, and Tv stored in the EEPROM 24 are read, and in step 32, the lower-phase switching elements X, ⁇ , and Z are simultaneously turned on.
  • step 33 the current detection value I Read.
  • Step 34 it is determined whether the current detection value I exceeds a threshold lb for determining a short circuit. If the current detection value I is not larger than the threshold lb, the process proceeds to Step 35. If the current detection value I is larger than the threshold lb, the process proceeds to step 52.
  • the current I for three phases can be read simultaneously or one phase at a time.
  • step 35 it is determined whether or not the current detection values I for the three phases are all 0. If not, in step 36, it is determined whether or not the current detection waveforms for the three phases are all sinusoidal. If it is a sine wave, it is determined in step 37 whether or not the current detection value I is greater than the protection level Is. If not, the process proceeds to step 38.
  • step 35 When it is determined in step 35 that the currents of all three phases are 0, the process proceeds directly to step 38, and in step 36, if one or more of the three phases is not a sine wave. If it is determined, the process proceeds to step 54.
  • step 38 it is checked whether or not a predetermined time T1 has elapsed since the lower-phase switching elements X, ⁇ , and Z were turned on. Repeat the process. When it is determined in Step 38 that the predetermined time T1 has elapsed, the process proceeds to Step 39, where the lower-phase switching elements X, Y, and Z are returned to the off state. Switching elements U, V, and W are turned on, and current detection is performed in step 41. Read out value I. Further, in step 42, it is determined whether or not the current detection value I exceeds the threshold value lb for determining a short circuit. When the value I is larger than the threshold lb, the process proceeds to step 50.
  • step 43 it is checked whether or not a predetermined time T1 has elapsed since the upper-phase switching elements U, V, W were turned on, and if not, the processing of steps 41 to 43 is repeated.
  • the process proceeds to step 44, where the upper-phase switching elements U, V, W are returned to the off state, and then compressed in step 45.
  • the operation of the refrigeration cycle is started by operating the machine 3 and the like, and then, in step 46, the start control of the motor 8M is started, and the operation proceeds to a known air conditioning operation.
  • step 37 if it is determined in step 37 that the current detection value I is larger than the protection level Is, the lower-phase switching elements X, ⁇ , and Z are turned off in step 47 and the next step 48 is performed. Then, the operation of the refrigeration cycle is started by operating the compressor 3 and the like, and after the repetition cycle Tv has passed in step 49, the process returns to the first step 31 and the above process is repeated.
  • step 42 When it is determined in step 42 that the current detection value I exceeds the short-circuit determination threshold lb, the switching elements U, V, and W of the upper phase are turned off in step 50, Subsequently, in step 51, the abnormality display section 15 displays that one or more of the lower-phase switching elements X, ⁇ , and Z are abnormal, and then in step 56, all devices including the refrigeration cycle are stopped. Perform an abnormal process such as
  • step 34 When it is determined in step 34 that the current detection value I exceeds the short-circuit determination threshold lb, in step 52, the lower-phase switching elements X, ⁇ , and Z are turned off.
  • step 53 the abnormal display section 15 displays that one or more of the upper phase switching elements U, V, and W are abnormal, and then stops all devices including the refrigeration cycle in step 56. Perform an abnormal process such as
  • step 36 If it is determined in step 36 that the three phases are not sinusoidal, the switching elements X, ⁇ , and Z of the lower phase are turned off in step 54, and in step 55, the motor winding is turned off. Indicates that a short circuit has occurred or that the current detection circuit 11 is abnormal, and proceeds to the process of step 56.
  • the control described with reference to FIGS. 4 to 6 can be performed by the MCU 25 included in the control unit 13 executing the processing illustrated in the flowchart of FIG.
  • the lower-phase switching element is turned on for braking in a state where the outdoor fan is rotating at a high speed due to natural wind or for charging the capacitor.
  • the demagnetization of the permanent magnet of the motor and the destruction of the lower phase switching element due to the overcurrent can be prevented.
  • the start of the outdoor fan is stopped to prevent the demagnetization of the motor and the destruction of the switching element, and the compressor is operated while the driving of the outdoor fan is stopped.
  • the air conditioner is operated and the outdoor fan is driven when natural wind stops. This prevents overloading of the refrigeration cycle due to continued operation of the compressor with little ventilation to the outdoor heat exchanger. can do.
  • the compressor 3 can perform the power control operation, so that the compressor 3 rotates according to the rotation speed of the outdoor fan 8 due to natural wind. If the number is controlled, the air conditioning operation can be performed without driving the outdoor fan 8.
  • the air conditioning operation is performed without driving the outdoor fan 8, the electric power consumed by the motor 8M is not required, and an energy saving effect can be obtained.
  • the rotation speed of the outdoor fan 8 is estimated, and based on the estimation result, the rotation speed of the compressor 3 is limited, and the air-conditioning operation can be performed in a range where overload does not occur.
  • FIG. 8 is a flowchart showing a specific processing procedure of an MCU constituting a control unit as a second embodiment of an air conditioner controlled according to this principle.
  • the lower phase switching elements X, ⁇ , and Z are turned on in step 61, the timer T is started in step 62, and the current I is detected in step 63.
  • step 64 it is determined whether or not the current detection value I is smaller than the protection level Is. If smaller, the process proceeds to step 65, and if not, the process proceeds to step 70.
  • step 65 it is determined whether or not the time counted by the timer T is equal to or greater than a predetermined value T1. Is repeated. If it is T1 or more, in step 66, for example, the rotational speed r of the outdoor fan 8 is estimated based on the current detection value I at that time.
  • step 67 it is determined whether or not the estimated rotational speed r is lower than the minimum rotational speed rl at which sufficient heat exchange is performed by natural wind. , And normal air-conditioning operation is executed in step 69.
  • step 73 it is determined in step 73 whether the estimated rotation speed r is lower than r2 set in a larger range.
  • the start of the outdoor fan 8 is stopped, the power supply frequency corresponding to the upper limit of the rotation speed of the compressor 3 is set to 40 Hz, and the process proceeds to step 72. If the estimated rotation speed r is not lower than r2, In step 75, the start of the outdoor fan 8 is stopped, the power supply frequency is set to 40 Hz corresponding to the upper limit of the rotation speed of the compressor 3, and the process proceeds to step 72.
  • step 64 If the current detection value I is equal to or higher than the protection level Is in step 64, the start of the outdoor fan 8 is stopped in step 70, and the air conditioning operation is performed in step 71 without limiting the rotation speed of the compressor.
  • step 72 it is determined whether or not a predetermined time Tv has elapsed. At the stage when the predetermined time Tv has elapsed, the process returns to step 61 and the same process is repeated.
  • the number of rotations can be estimated without using the rotation position detecting element, and an energy saving effect can be obtained.
  • the rotation speed of the outdoor fan 8 is estimated, but this rotation speed estimation method can be used for the dehumidifying operation. That is, in the dehumidifying operation, etc., since the rotation speed of the compressor 3 is reduced, the amount of heat exchange in the outdoor heat exchange 5 can be small, so that even if the amount of ventilation to the outdoor heat exchanger 5 is small. good. Therefore, the heat exchange amount (required heat exchange amount) of the outdoor heat exchanger 5 required in the air-conditioning operation is calculated, and it is estimated whether or not it is necessary to drive the outdoor fan 8 according to the required heat exchange amount. It may be determined according to the rotation speed of the outdoor fan 8.
  • the required heat exchange amount in the air conditioner is determined based on the rotational speed of the compressor, the operation mode, and the like as a meter.
  • the rotation speed F of the outdoor fan 8 corresponding to the required heat exchange amount determined here (the rotation speed in a state where the outdoor fan 8 rotates freely by natural wind) is determined and compared with the rotation speed estimation value r.
  • FIG. 9 is a flowchart showing a specific processing procedure of an MCU constituting a control unit as a third embodiment of an air conditioner controlled according to this principle. In this case, the lower-stage switching elements X, ⁇ , and Z are turned on in step 81, the timer T is started in step 82, and the current I is detected in step 83.
  • step 84 it is determined whether or not the current detection value I is smaller than the protection level Is. If smaller, the process proceeds to step 85, and if not, the process proceeds to step 91.
  • step 85 it is determined whether or not the time counted by the timer T is equal to or greater than a predetermined value T1, and if not, the processing of steps 83-85 is repeated. If it is not less than T1, in step 86, the rotational speed r of the outdoor fan 8 is estimated.
  • step 87 the required fan rotation speed F of the air conditioner is determined, and then, in step 88, it is determined whether or not the estimated rotation speed r is lower than the required rotation speed F.
  • start control of the outdoor fan 8 is performed in step 89, and normal air conditioning operation is performed in step 90.
  • step 84 when it is determined in step 84 that the current detection value I is not smaller than the protection level Is, and in step 88, it is determined that the estimated rotation speed r is not lower than the required rotation speed F.
  • step 91 the start of the outdoor fan 8 is stopped in step 91, the air conditioning operation is performed in step 92, and it is determined whether or not a predetermined time Tv has elapsed in step 93. Return and repeat the same process.
  • the third embodiment it is possible to estimate the number of rotations without using a rotation position detecting element, and it is possible to obtain an energy saving effect.
  • the air conditioner has been described as an embodiment of the refrigeration cycle apparatus.
  • the hot water supply having an outdoor unit and a refrigeration cycle configured similarly to the air conditioner is described.
  • Instruments are also being marketed.
  • the present invention can be applied not only to air conditioners but also to other refrigeration cycle devices such as water heaters whose main parts are configured similarly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Inverter Devices (AREA)

Abstract

L'objectif de la présente invention est de mettre au point un contrôleur de ventilateur capable d'empêcher une démagnétisation de l'aimant permanent d'un moteur et la dégradation d'un élément de commutation sur la face négative d'un inverseur, même si le contrôle de démarrage est effectué lorsque le ventilateur tourne avec un vent naturel, ainsi qu'un système de cycle de réfrigération et un procédé pour estimer la vitesse de rotation du ventilateur. La présente invention concerne un système de contrôle (13) qui active des éléments de commutation pour les trois phases formant le bras de face négative d'un inverseur au moment du démarrage et qui, lorsque le niveau de courant détecté par un système de détection de niveau de courant (11) à l'état passant dépasse un niveau de protection réglé inférieur à un niveau jugé comme court-circuit du bras, remet les éléments de commutation pour les trois phases à l'état bloqué, ce qui interrompt l'opération de démarrage.
PCT/JP2004/013932 2003-10-17 2004-09-24 Controleur de ventilateur, systeme de cycle de refrigeration et procede pour estimer la vitesse de rotation d'un ventilateur WO2005039037A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003-357900 2003-10-17
JP2003357900A JP4436651B2 (ja) 2003-10-17 2003-10-17 冷凍サイクル装置

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WO2005039037A1 true WO2005039037A1 (fr) 2005-04-28

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PCT/JP2004/013932 WO2005039037A1 (fr) 2003-10-17 2004-09-24 Controleur de ventilateur, systeme de cycle de refrigeration et procede pour estimer la vitesse de rotation d'un ventilateur

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JP (1) JP4436651B2 (fr)
KR (1) KR100803444B1 (fr)
CN (1) CN100508358C (fr)
WO (1) WO2005039037A1 (fr)

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Publication number Priority date Publication date Assignee Title
JP5381070B2 (ja) * 2008-12-15 2014-01-08 ダイキン工業株式会社 多相モータ駆動方法、多相モータ駆動システム及びヒートポンプ装置
JP5424250B2 (ja) * 2009-11-12 2014-02-26 シャープ株式会社 モータ制御装置
JP5532065B2 (ja) * 2012-02-29 2014-06-25 株式会社デンソー 電動機駆動装置
JP6012211B2 (ja) * 2012-03-19 2016-10-25 日立アプライアンス株式会社 モータ駆動装置とこれを備える空気調和機
KR102436704B1 (ko) * 2015-03-23 2022-08-25 엘지전자 주식회사 팬 모터 구동장치 및 이를 구비하는 공기조화기
CN105375824A (zh) * 2015-11-11 2016-03-02 苏州展宇电子有限公司 一种油烟机瞬停瞬启控制方法
US20230145142A1 (en) * 2020-06-16 2023-05-11 Mitsubishi Electric Corporation Motor driver and heat pump
DE102021117090A1 (de) 2021-07-02 2023-01-05 Fronius International Gmbh Verfahren zum Betreiben eines Photovoltaik-Wechselrichters

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0989352A (ja) * 1995-09-28 1997-04-04 Toshiba Corp 室外送風機の駆動装置
JPH10323078A (ja) * 1997-05-14 1998-12-04 Matsushita Seiko Co Ltd ブラシレスモーター運転制御装置
JPH11187690A (ja) * 1997-12-18 1999-07-09 Toshiba Corp インバータ装置及びブラシレスファンモータ
JP2000125584A (ja) * 1998-10-14 2000-04-28 Toshiba Kyaria Kk 空気調和機の室外ファン用ブラシレスモータの駆動装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100376383B1 (ko) * 2000-12-15 2003-03-17 주식회사 터보테크 센서리스 브러시리스 직류모터의 구동방법 및 그 장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0989352A (ja) * 1995-09-28 1997-04-04 Toshiba Corp 室外送風機の駆動装置
JPH10323078A (ja) * 1997-05-14 1998-12-04 Matsushita Seiko Co Ltd ブラシレスモーター運転制御装置
JPH11187690A (ja) * 1997-12-18 1999-07-09 Toshiba Corp インバータ装置及びブラシレスファンモータ
JP2000125584A (ja) * 1998-10-14 2000-04-28 Toshiba Kyaria Kk 空気調和機の室外ファン用ブラシレスモータの駆動装置

Also Published As

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KR20060063995A (ko) 2006-06-12
CN1868111A (zh) 2006-11-22
JP2005124330A (ja) 2005-05-12
CN100508358C (zh) 2009-07-01
KR100803444B1 (ko) 2008-02-13
JP4436651B2 (ja) 2010-03-24

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