JP2003254287A - Fan motor and ventilator equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fan motor in which an air quantity is controlled to a constant value of an instructed air quantity despite a fan motor model equipped with a DC motor for energization switching of an armature winding according to a signal of a hole IC, and also to provide a ventilator equipped with the same. <P>SOLUTION: A maximum static pressure executing means 10 substantially maximizes a static pressure on the fan motor 1, and a characteristic deviation determining means 8a compares an operational rotating speed with the substantially maximum static pressure and a referential comparison target rotating speed as an operational rotating speed with the substantially maximum static pressure on a referential DC motor to determine a characteristic deviation from the referential DC motor due to dispersion by the manufacture of the DC motor, so that a specified rotating speed is corrected. Without influences of the characteristic dispersion of the DC motor 2 and a change in atmospheric temperature, the fan motor and the ventilator is precisely operated for a constant value of an instructed air quantity. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan motor mainly mounted in a ventilation device for exhaust and air supply such as a range hood or a ceiling-embedded type, and a ventilation device equipped with the fan motor.

[0002]

2. Description of the Related Art In recent years, in a range hood, a ceiling-embedded ventilation device, etc., power consumption has been reduced by improving efficiency, and pressure loss due to duct piping form, outside wind pressure, pressure due to clogging of filters, etc. There is a demand for a fan motor with good controllability that can ventilate with an optimal air volume according to cooking conditions and living room conditions without being affected by changes in loss. In addition, a fan motor that is quieter and consumes less power is demanded with the increase in 24-hour constant ventilation.

Conventionally, as an example of a fan motor of this type, Japanese Patent Application Laid-Open Nos. 5-146189 and 5-22309.
No. 1, JP-A-8-140390 and JP-A-62.
No. 163,791 and Japanese Patent Application Laid-Open No. 8-152165 are disclosed. JP-A-5-14618
No. 9, JP-A-5-223091 and JP-A-8-
The fan motor of the constant air flow control method disclosed in Japanese Patent No. 140390 is equipped with a DC motor, and includes a rotation speed detecting means for detecting an operating rotation speed of the fan motor and an applied voltage detecting means for detecting an applied voltage to the fan motor. Provided is a specified rotation speed storage means for storing the specified rotation speed required for constant operation with respect to the indicated air volume corresponding to a plurality of applied voltages, and the specified rotation speed required when the applied voltage detected by the applied voltage detection means is provided. The fan motor is configured such that the number of rotations is selected from the specified rotation speed storage means and the applied voltage is increased or decreased so that the operating rotation speed detected by the rotation speed detection means matches the selected specified rotation speed. Also, JP-A-62-16279
The air volume control method for the blower / exhaust air blower disclosed in Japanese Patent Publication No. 1 detects the input power to the three-phase induction motor when the blower / exhaust air blower is actually operated at a predetermined reference rotational speed, Regarding the relationship between the blown and discharged air amount and the input power at the reference rotation speed of the wind blower, the operating wind flow rate is calculated from a functional expression utilizing the fact that the efficiency of the three-phase induction motor and the fan efficiency of the blower blower are known
This is a configuration in which the rotational speed at which a desired air supply / exhaust air volume can be obtained from the calculated air supply / exhaust air volume is calculated from the functional expression and controlled.
Further, a ventilation fan air volume control device disclosed in Japanese Patent Application Laid-Open No. 8-152165 starts a fan motor equipped with a DC motor with a constant current, detects an operating speed at that time, and detects the load amount of the exhaust fan from the operating speed. The installation conditions are searched for, the set rotation speed of the fan motor corresponding to the set air volume is obtained based on the searched load amount, and the set rotation speed and the operating rotation speed are controlled to match while varying the voltage (at this time The current value is not the control target). However, with the increase in 24-hour constant ventilation, a DC motor has been mounted instead of an induction motor for higher efficiency. Further, the number of magnetic poles of the magnet rotor has been increased from 4 to 6 or 8. In a motor with a high output of more than 25 W, the power supply to the armature winding of the DC motor is 1
From 20 degrees to 130 degrees, from 130 degrees to 140 degrees, 14
It is also necessary to control the energization by expanding the conduction angle from 0 degree to 150 degrees. For that purpose, a Hall IC or the like is used instead of the method of detecting the zero cross of the induced voltage for the magnetic pole position of the magnet rotor. Detects the magnetic pole position of the magnet rotor,
The method of switching the energized phase is adopted. D like this
In the case of the C motor, the Hall IC is mounted and soldered on the printed circuit board so that the magnet rotor has a certain amount of air gap so that the magnetic flux leaking from the magnet can be detected by the Hall IC. This is the structure of the DC motor attached to the stator of the above. In addition, for motors with an output of 25 W or less, there is an increasing number of methods that employ a DC motor having a motor drive circuit built into the motor in order to miniaturize the control circuit. In this case,
A general-purpose drive IC that has a Hall IC on a printed circuit board, a logic circuit that switches the energizing phase to the armature winding based on the output signal of this Hall IC, and a switching element
The structure of the DC motor in which the printed circuit board is attached to the stator inside the DC motor so that the magnetic flux leaking from the magnet can be detected by the Hall IC by mounting / soldering etc. Is.

[0004]

According to such a conventional fan motor, according to the air volume control method of the blower / exhaust fan disclosed in Japanese Patent Laid-Open No. 62-162791, static pressure and air temperature in the fan motor are controlled. Due to the change, the inflow angle of the air to the fan blades, the inflow position, and the degree of vortex generation change, so the fan efficiency becomes non-linear and cannot be easily known.Fan load (torque), magnet temperature, winding The rate of copper loss, iron loss, mechanical loss, and their absolute values, which are motor losses, and their absolute values change due to changes in the line resistance value, and the motor efficiency also becomes non-linear, which is not easily known and at room temperature. However, according to the disclosed contents, it is difficult to realize the constant air volume control, and the control specifications are uniform for each product, and there is a problem that the air volume control with high accuracy cannot be performed.

In the ventilation fan air volume control device disclosed in Japanese Unexamined Patent Publication No. 8-152165, installation conditions such as pressure loss conditions for duct piping are estimated from the judgment of the number of revolutions under a constant current at constant intervals. Therefore, it is very likely that the load condition will be erroneously judged to be different from the actual condition due to the change of the air specific weight due to the change of the air temperature or the influence of the outside wind at the time of estimation. There was a problem that I could not do it.

Further, even if the load condition at the time of estimation can be accurately estimated, since the detection of the load condition is one point only at that time, the opening / closing state of the door in the living room,
In an environment where the air temperature is different from that at the time of estimation, since the air volume different from the set air volume is intentionally controlled, there is a problem that the air volume constant control with high accuracy cannot be performed.

Further, JP-A-5-146189, JP-A-5-223091, and JP-A-8-140390.
In the structure of the publication, in order to improve efficiency and reduce vibration,
As disclosed in Japanese Patent Application Laid-Open No. 8-152165, DC
When switching the energized phase to the armature winding of the motor based on the signal output of the Hall IC, the Hall I
Even if the mounting accuracy of the mounting machine is high, C.
2mm-0.3mm (on a plane) will shift. Also,
Since the amount of adhesive applied during mounting also varies,
The gap between the magnet and the Hall IC varies, which causes a difference in the signal change of the Hall IC. Furthermore, the Hall IC sensor sensitivity also has a variation of ± 20 mT, and when these variations are combined, D with a magnet outer diameter of 50 mm and a magnet pole count of 8
In the case of the C motor, the conduction phase with respect to the induced voltage phase varies by about ± 10 degrees in electrical angle, and the applied voltage and current required to output the same torque and rotation speed vary greatly depending on the variation of the conduction phase. . Generally, when the commutation timing is delayed and the energization phase is the delayed phase, the applied voltage and current for outputting the same torque and rotation speed are also high, and conversely, when the energization phase is the advanced phase, Both the applied voltage and the current are low. Here, FIG. 8 shows an air flow rate at the same instructed air flow rate and the same applied voltage in a motor having a lead phase of a conventional fan motor and a motor having a lead phase of a delay phase-
The static pressure and air volume-rotation speed characteristics are shown. As shown in the figure, at the same instruction air volume and the same applied voltage, the motor having the delayed energization phase has a higher rotation speed than the motor having the advanced phase. Therefore, since the table of the voltage applied to the DC motor and the specified rotation speed for the indicated air volume differs depending on the difference in the energization phase, when the table is created with the DC motor whose center is the energization phase, and the energization phase is the delay phase, Since the voltage applied to the DC motor is increased in order to make the number of revolutions equal to the specified number of revolutions, the air volume greatly increases, and conversely, when the energization phase advances, the number of revolutions is set to the specified number of revolutions. Since the voltage applied to the DC motor is stepped down in order to make it the same as the above, there is a problem that the air volume is significantly reduced.

Further, in order to realize constant air volume control,
There is a problem that it is not versatile because it is necessary to create a table individually after confirming the position of the Hall IC or to select and mount a DC motor.

Further, in recent years, the number of DC motors of the high-voltage PWM drive system has been increasing, so that JP-A-5-146189, JP-A-5-223091 and JP-A-8-140 are available.
When the high-voltage PWM drive method is applied to the method that uses the voltage applied to the DC motor as a parameter as shown in the configuration of Japanese Patent No. 390, the value obtained by multiplying the crest value after rectifying and smoothing the AC power supply by the duty is used. Since it needs to be a parameter, due to the ROM capacity limitation of the microcomputer used,
There is a problem that the resolution becomes coarse and it is difficult to realize highly accurate control at low cost.

The present invention solves such a conventional problem, and switches the energization to the armature winding on the basis of the signal output of the Hall IC so that the energization phase becomes a delay phase or a lead phase. An object of the present invention is to provide a fan motor capable of controlling the air volume even at a low cost with high accuracy and constant even for a fan motor equipped with a motor, and a ventilation device equipped with the fan motor.

[0011]

In order to achieve the above object, a fan motor of the present invention is a fan motor equipped with a DC motor, and position detecting means for detecting a magnetic pole position of a magnet rotor of the DC motor. And an energization control unit that controls energization of a plurality of armature windings of the DC motor based on the signal from the position detection unit, and a rotation that detects the operating speed of the DC motor from the signal output of the position detection unit. A number of detecting means, an air volume instruction means for instructing the operation air volume of the fan motor, and a plurality of prescribed rotation speeds required for the reference DC motor for constant operation at each air volume instructed by the air volume instruction means. A reference time specified rotation speed storage means for storing each applied voltage, a maximum static pressure execution means for substantially maximizing the static pressure applied to the fan motor, the DC motor and the reference. A characteristic deviation discriminating means for discriminating the characteristic difference of the DC motor, and a prescribed rotation speed correction means for compensating the prescribed rotation speed stored in the reference time prescribed rotation speed storage means on the basis of the judgment result of the characteristic deviation discrimination means. The air flow rate control means for controlling the applied voltage to the DC motor so that the specified rotational speed and the operating speed detected by the rotational speed detection means match, and a predetermined applied voltage is applied to the reference DC motor. The reference time comparison target rotation speed storage means for storing the operating speed when the maximum static pressure execution means makes the static pressure applied to the fan motor substantially maximum as the reference time comparison target rotation speed, The deviation discriminating means applies a predetermined applied voltage to the DC motor, and the maximum static pressure execution means makes the static pressure applied to the fan motor approximately maximum and the operating speed and the reference time comparison target time. Is obtained by the configuration of the fan motor and determining a correction amount for correcting the operating speed from the difference between the comparison rotational speed when the stored reference to the number storage means.

According to the present invention, the magnetic pole position of the magnet rotor is detected by using the magnetic pole detection element such as a Hall IC, and the conduction phase is switched, and the conduction phase is delayed or advanced with respect to the induced voltage phase. Even if a DC motor that operates as follows is installed, the characteristic deviation determination unit determines the specified rotation speed from the difference between the actual operating rotation speed of the fan motor at the time of approximately maximum static pressure and the reference comparison rotation speed of the reference DC motor. Since the current is corrected and controlled, there is no change in the ambient temperature even if the energization phase varies, physical elements such as bearings affect the motor characteristics due to aging, or the DC motor is replaced as a service component. It is possible to obtain a fan motor that can constantly control the air flow rate with high accuracy and constant in space.

Another means is a fan motor equipped with a DC motor, the position detecting means detecting the magnetic pole position of the magnet rotor of the DC motor, and the DC motor based on the signal from the position detecting means. Energization control means for controlling energization to the plurality of armature windings, rotation speed detection means for detecting the operating rotation speed of the DC motor from the signal output of the position detection means, and ambient temperature in which the fan motor is installed. Ambient temperature detecting means for detecting the air flow rate, air volume instruction means for instructing the operating air volume of the fan motor, and a reference for performing constant operation at each air volume instructed by the air volume instruction means at the reference ambient temperature. A reference time prescribed rotation speed storage means for storing the required prescribed rotation speed of the DC motor for each of a plurality of applied voltages, and a static pressure applied to the fan motor to a maximum. From the maximum static pressure executing means, the characteristic deviation judging means for judging the characteristic difference between the DC motor and the reference DC motor, the judgment result of the characteristic deviation judging means and the atmosphere temperature detected by the atmosphere temperature detecting means, The specified rotation speed correction means for correcting the specified rotation speed stored in the reference time specified rotation speed storage means, and the DC so that the corrected specified rotation speed and the operating rotation speed detected by the rotation speed detection means match. An air flow control means for controlling a voltage applied to the motor and a predetermined applied voltage is applied to the reference DC motor at a reference ambient temperature so that the maximum static pressure execution means substantially eliminates the static pressure applied to the fan motor. And a reference time comparison target rotation speed storage unit that stores the maximum operating speed as a reference time comparison target rotation speed, wherein the characteristic deviation determination unit is located in the DC motor. And the reference time comparison target rotation stored in the reference time comparison target rotation speed storage means when the maximum static pressure execution means maximizes the static pressure applied to the fan motor. The fan motor is characterized in that the number and the number are compared under the same ambient temperature condition, and the correction amount for correcting the specified rotation number is determined from the difference in the rotation number.

According to the present invention, the magnetic pole position of the magnet rotor is detected by using the magnetic pole detection element such as a Hall IC, and the conduction phase is switched, and the conduction phase is delayed or advanced with respect to the induced voltage phase. Even if a DC motor that operates as follows is installed, the characteristic deviation determination means sets the actual operating speed of the fan motor at substantially the maximum static pressure and the reference-time comparison target speed of the reference DC motor under the same ambient temperature conditions. And the amount of correction of the characteristic deviation of the DC motor is determined from the difference in the number of revolutions, and the prescribed rotation speed correction means combines the characteristic deviation and the amount of temperature change corresponding to the temperature change of the ambient temperature, and regulates it. Because the control is performed while correcting the rotation speed, even if the energization phase varies, physical characteristics such as bearings affect the motor characteristics due to aging, etc., even if the DC motor is replaced as a service part, spring, summer, autumn, winter , Regardless night, the fan motor can be controlled constant at a high accuracy can be obtained at all times for the indicated airflow.

Another means is a fan motor equipped with a DC motor, the position detecting means for detecting the magnetic pole position of the magnet rotor of the DC motor, and the DC motor based on the signal from the position detecting means. An energization control unit that controls energization to the plurality of armature windings, a rotation speed detection unit that detects the operating speed of the DC motor from the signal output of the position detection unit, and a current detection unit that detects a current, An air volume instruction means for instructing an operation air volume of the fan motor,
In order to perform a constant operation at each air volume instructed by the air volume instruction means, a reference time prescribed rotation speed storage means for storing a required prescribed rotation speed of a reference DC motor for each of a plurality of currents, and the fan motor. Maximum static pressure execution means for making such static pressure approximately maximum, the DC motor, and the reference DC.
A characteristic deviation discriminating means for discriminating the characteristic difference of the motor, and a prescribed rotation speed correction means for compensating the prescribed rotation speed stored in the reference time prescribed rotation speed storage means based on the determination result of the characteristic deviation discrimination means. The specified rotational speed and the operating rotational speed detected by the rotational speed detecting means are made equal to each other.
When a predetermined applied voltage is applied to the air flow rate control means for controlling the voltage applied to the C motor and the reference DC motor, and the maximum static pressure execution means maximizes the static pressure applied to the fan motor. A reference time comparison target rotation speed storage means for storing the operating speed as a reference time comparison target rotation speed;
The characteristic deviation determination means applies a predetermined applied voltage to the DC motor, and the maximum static pressure execution means makes the static pressure applied to the fan motor approximately maximum and the operating speed and reference time comparison target speed memory. The fan motor is characterized in that a correction amount for correcting the specified rotation speed is determined from a difference from the reference comparison rotation speed stored in the means.

According to the present invention, in addition to the PWM driving, the magnetic pole position of the magnet rotor is detected by using the magnetic pole detection element such as a Hall IC, and the conduction phase is switched, and the conduction phase is relative to the induced voltage phase. , DC that is a lag phase or a lead phase
Even if the motor is mounted, the characteristic deviation determination means compares the actual operating speed of the fan motor at approximately the maximum static pressure with the reference comparison speed of the reference DC motor under the same ambient temperature conditions. Then, the correction amount for the characteristic deviation of the DC motor is determined from the difference in the number of rotations, and the specified rotation speed correction unit combines the characteristic deviation and the temperature change corresponding to the temperature change of the ambient temperature to obtain the specified rotation speed. Since the control is performed while correcting, even if the energization phase varies or the DC motor is replaced as a service component, a fan motor can be obtained that can be constantly controlled with high accuracy and constant with respect to the instructed air volume in a space where the ambient temperature does not change. .

Another means is a fan motor equipped with a DC motor, the position detecting means detecting the magnetic pole position of the magnet rotor of the DC motor, and the DC motor based on the signal from the position detecting means. Energization control means for controlling energization to the plurality of armature windings, rotation speed detection means for detecting the operating rotation speed of the DC motor from the signal output of the position detection means, and ambient temperature in which the fan motor is installed. Atmospheric temperature detecting means for detecting the current, current detecting means for detecting the current, air volume instruction means for instructing the operating air volume of the fan motor, at the reference ambient temperature, at each air volume instructed by the air volume instruction means A reference time prescribed rotation speed storage means for storing a required prescribed rotation speed of a reference DC motor for a plurality of currents for constant operation, and the fan motor. And the maximum static pressure exemplary means for substantially maximum such static pressure, DC to be the DC motor and the reference
From the characteristic deviation discriminating means for discriminating the characteristic difference of the motor, and from the judgment result of the characteristic deviation discriminating means and the atmosphere temperature detected by the atmosphere temperature detecting means, the specified rotation speed stored in the reference time specified rotation speed storage means is calculated. A specified rotation speed correction means for correcting, an air volume control means for controlling the voltage applied to the DC motor so that the corrected specified rotation speed and the operating rotation speed detected by the rotation speed detection means match, and a reference atmosphere. A predetermined applied voltage is applied to the reference DC motor at a temperature, and the operating rotation speed when the maximum static pressure execution means maximizes the static pressure applied to the fan motor is set as a reference comparison rotation speed. A reference time rotation speed storage means for storing the characteristic deviation determination means,
When a predetermined applied voltage is applied to the motor and the maximum static pressure execution means maximizes the static pressure applied to the fan motor, the operating speed and the reference time stored in the reference time comparison target speed storage means The fan motor is characterized in that the comparison target rotation speed is compared under the same ambient temperature condition, and the correction amount for correcting the specified rotation speed is determined from the difference in the rotation speed.

According to the present invention, in addition to the PWM drive, the magnetic pole position of the magnet rotor is detected by using the magnetic pole detection element such as a Hall IC, and the conduction phase is switched, and the conduction phase is relative to the induced voltage phase. , DC that is a lag phase or a lead phase
Even if the motor is mounted, the characteristic deviation determination means compares the actual operating speed of the fan motor at approximately the maximum static pressure with the reference comparison speed of the reference DC motor under the same ambient temperature conditions. Then, the correction amount for the characteristic deviation of the DC motor is determined from the difference in the number of rotations, and the specified rotation speed correction unit combines the characteristic deviation and the temperature change corresponding to the temperature change of the ambient temperature to obtain the specified rotation speed. Since the control is performed while correcting, even if the energization phase varies or the DC motor is replaced as a service component, a fan motor that can constantly control the indicated air volume with high accuracy regardless of spring, summer, autumn, winter, day or night is obtained. To be

Still another means is a fan motor having a structure in which the maximum static pressure executing means controls the suction side of the fan motor to a substantially closed state.

According to the present invention, since the suction side of the fan motor is substantially shut off, air leakage and turbulence at the tongue portion of the casing of the fan motor is suppressed, and the generation of vortices circulating in the fan blade portion is prevented. Since the operation speed does not fluctuate at the maximum static pressure due to the suppression, the state of the characteristic deviation of the DC motor can be highly accurately grasped, and the fan motor that can always perform the highly precise constant control with respect to the instructed air volume. Is obtained.

Another means is a fan motor construction characterized in that the maximum static pressure execution means is not completely closed.

According to the present invention, the characteristic deviation discriminating means is DC.
When grasping the state of the motor, the generation of air currents that reciprocate on the same surface of the fan blade is suppressed, so that the generation of vibration due to uneven rotation is suppressed, and thus a fan motor with low vibration can be obtained.

Another means is a fan motor configuration characterized in that the characteristic deviation discriminating means operates periodically.

According to the present invention, the characteristic deviation discriminating means is DC.
Since the state of the characteristic surface of the motor is periodically checked, even if physical elements such as bearings affect the motor characteristics due to aging, etc., or even if the DC motor is replaced as a service part, it always responds to the indicated air volume. A fan motor that can be controlled with high precision and constant is obtained.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a fan motor equipped with a DC motor, which constantly operates with an air volume instruction means for instructing an operating air volume of the fan motor and each air volume instructed by the air volume instruction means. Therefore, the standard DC
A reference time specified rotation speed storage means for storing a necessary specified rotation speed of the motor for each of a plurality of applied voltages; a maximum static pressure execution means for making the static pressure applied to the fan motor substantially maximum;
A characteristic deviation discriminating means for discriminating a characteristic difference between the C motor and the reference DC motor, and a regulation for correcting the prescribed rotation speed stored in the reference prescribed rotational speed storage means from the judgment result of the characteristic deviation discrimination means. Rotation speed correction means, air volume control means for controlling the applied voltage to the DC motor so that the corrected specified rotation speed and the operating rotation speed detected by the rotation speed detection means match, and the reference DC motor. A reference time comparison target rotation speed memory that stores an operating rotation speed when the maximum static pressure execution means makes the static pressure applied to the fan motor substantially maximum as a reference time comparison target rotation speed The characteristic deviation discriminating means applies a predetermined applied voltage to the DC motor and the maximum static pressure execution means makes the static pressure applied to the fan motor substantially maximum. The fan motor is characterized in that a correction amount for correcting the specified rotation speed is determined from the difference between the number and the reference time comparison target rotation speed stored in the reference time comparison target rotation speed. The characteristic deviation determining means determines the characteristics of the DC motor due to variations in the mounting position of the Hall IC or the like from the difference between the actual operating speed of the fan motor at the time of approximately maximum static pressure and the reference comparison speed of the DC motor. It has the effect of accurately grasping the state of the surface and correcting the specified rotation speed.

Further, the ambient temperature detecting means for detecting the ambient temperature in which the fan motor is installed, and the reference DC motor for constant operation at each air volume instructed by the air volume instruction means at the reference ambient temperature. Required reference rotation speed for each of a plurality of applied voltages, reference time reference rotation speed storage means, maximum static pressure execution means for making the static pressure applied to the fan motor approximately maximum, the DC motor and the reference The characteristic deviation discriminating means for discriminating the characteristic difference of the DC motor, and the regulation stored in the reference time prescribed rotational speed storage means from the judgment result of the characteristic deviation discriminating means and the ambient temperature detected by the ambient temperature detecting means. To the DC motor, the specified rotation speed correction means for correcting the rotation speed and the corrected rotation speed and the operating rotation speed detected by the rotation speed detection means are matched. An air flow control means for controlling the applied voltage, wherein the characteristic deviation determination means applies a predetermined applied voltage to the DC motor, and the maximum static pressure execution means maximizes the static pressure applied to the fan motor. Compensation for comparing the operating rotation speed of the reference rotation speed and the reference time comparison target rotation speed stored in the reference time comparison target rotation speed under the same ambient temperature condition, and correcting the specified rotation speed from the difference in the rotation speeds. A fan motor is characterized in that the amount is determined, and the characteristic deviation discriminating means compares the actual operating revolution speed of the fan motor at substantially the maximum static pressure with the reference comparison revolution speed of the DC motor. Are compared under the same ambient temperature conditions, and the characteristic speed of the DC motor is accurately grasped from the difference in the number of revolutions, and the prescribed number of revolutions is corrected.

In addition, the required specified number of revolutions of the DC motor serving as a reference is stored for each of a plurality of currents in order to perform a constant operation with the current detection means for detecting the current and the air volume instructed by the air volume instruction means. A reference-time specified rotation speed storage means, a maximum static pressure execution means for making the static pressure applied to the fan motor substantially maximum, and a characteristic deviation determination means for determining a characteristic difference between the DC motor and the reference DC motor, Based on the determination result of the characteristic deviation determination means, the specified rotation speed correction means for correcting the specified rotation speed stored in the reference time specified rotation speed storage means, the corrected specified rotation speed and the rotation speed detection means are detected. The air flow rate control means for controlling the voltage applied to the DC motor so that the operating speeds of the DC motor and the characteristic deviation discriminating means apply a predetermined applied voltage to the DC motor. The specified rotation speed is corrected from the difference between the operating rotation speed when the static pressure applied to the fan motor is substantially maximized by the pressure execution means and the reference comparison rotation speed stored in the reference comparison rotation speed storage means. This is a fan motor configuration characterized by determining a correction amount.
Even in the case of a WM-driven DC motor, the Hall effect IC or the like is calculated from the difference between the actual operating rotation speed of the fan motor at the time when the fan motor is at the maximum static pressure and the reference comparison rotation speed of the reference DC motor even when the characteristic deviation determination means This has the effect of accurately grasping the state of the characteristic surface of the DC motor due to variations in the mounting position and correcting the specified rotation speed.

Further, the current detection means for detecting the current and the required specified number of rotations of the reference DC motor for constant operation at each air volume instructed by the air volume instruction means at the reference ambient temperature, A reference time specified rotation speed storage means for storing a plurality of currents, a maximum static pressure execution means for making the static pressure applied to the fan motor substantially maximum, and a characteristic difference between the DC motor and the reference DC motor are determined. Characteristic deviation determining means, and a specified rotation speed correction for correcting the specified rotation speed stored in the reference specified rotation speed storage means from the judgment result of the characteristic deviation judgment means and the atmosphere temperature detected by the atmosphere temperature detecting means. Means, and an air volume control means for controlling the voltage applied to the DC motor so that the corrected specified rotation speed and the operation rotation speed detected by the rotation speed detection means match. The characteristic deviation discriminating means applies a predetermined applied voltage to the DC motor, and the maximum static pressure execution means makes the static pressure applied to the fan motor substantially maximum and the operating speed and the reference comparison target speed. A fan motor characterized in that the reference time comparison target rotation speed stored in the storage means is compared under the same ambient temperature condition, and a correction amount for correcting the specified rotation speed is determined from the difference in the rotation speed. Even in the case of a PWM driven DC motor, the characteristic deviation discriminating means sets the actual operating rotational speed of the fan motor at substantially the maximum static pressure and the reference comparison rotational speed of the reference DC motor. Compare under the same ambient temperature conditions,
The state of the characteristic surface of the DC motor is accurately grasped from the difference in the number of revolutions and the temperature change of the ambient temperature, and the specified number of revolutions is corrected.

Further, the maximum static pressure executing means is a fan motor structure characterized in that the suction side of the fan motor is controlled to a substantially shut-off state, and air leakage at the tongue portion of the casing of the fan motor is prevented. Since it suppresses turbulence and suppresses the generation of vortices circulating in the fan blade portion, it has the effect of suppressing variations in operating speed at maximum static pressure.

Further, the maximum static pressure execution means is a fan motor construction characterized by not being in a completely closed state, and uneven rotation is suppressed because the generation of an air flow reciprocating on the same surface of the fan blade is suppressed. It has the effect of suppressing the generation of vibration as well as suppressing it.

Another means is a fan motor configuration characterized in that the characteristic deviation discriminating means operates periodically, and the characteristic deviation discriminating means cyclically changes the state of the characteristic surface of the DC motor. It has the effect of grasping.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
Will be described with reference to.

[0033]

(Embodiment 1) As shown in FIGS. 1 to 6, reference numeral 1 denotes a centrifugal fan motor equipped with a DC motor 2.
Is a box-shaped ventilation device with a built-in fan motor 1,
An air supply port 19a for sucking indoor air from the room and an exhaust port 19b for exhausting the sucked indoor air to the outside.
Is open. Indoor air contaminated by cigarette smoke, waste gas from cooking, and oil smoke sucked by the fan motor 1 in the ventilation device 19 through the air supply duct 14a and the air supply port 19a passes through the exhaust port 19b and the exhaust duct 14b. It penetrates through the wall 15 of the building and is discharged outdoors. Reference numeral 4 denotes an ambient temperature detecting means such as a thermistor, which detects the temperature of the air to be ventilated. The DC motor 2 has a Hall IC 5 for detecting the magnetic pole position of the magnet rotor 3 and a drive logic circuit 6a.
And a drive IC (not shown) on which the energization control unit 6 including the switching element group 6b and the like are mounted, and a printed circuit board (not shown) on which electronic components such as a capacitor are mounted (FIG. 1 is a block). For the sake of illustration, not shown in the state of being built in the DC motor 2. The drive logic circuit 6a is based on the signal output of the Hall IC 5 and the switching element group 6b.
Is controlled to be turned on / off to control switching of energization to the armature winding 17. 13 is a weak, medium, strong fan motor 1
9 is a hall IC
Reference numeral 5 denotes an operating speed detecting means for detecting the operating speed from the signal output of 5, and reference numeral 18 denotes an applied voltage detecting means for detecting an applied voltage to the DC motor 2. Reference numeral 16 is an air supply damper, which has a structure capable of closing the air supply port 19a by about 95% in response to a command from the maximum static pressure execution means 10. Reference numeral 12 indicates, for each air volume instructed by the air volume instructing means 13, the reference DC motor at the reference temperature, and the number of rotations required for constant operation at the instructed air volume corresponding to a plurality of applied voltages. It is a reference time standard rotation speed storage means for storing. Reference numeral 8 denotes a specified rotation speed correction means, which is a characteristic deviation determination means 8a for correcting the specified rotation speed of the DC motor 2 for the characteristic deviation from the reference DC motor, and the temperature detected by the ambient temperature detection means 4. And a temperature correction means 8b that corrects the specified rotation speed according to the temperature difference between the reference predetermined temperature. Reference numeral 11 denotes an air volume control means, which selects a reference prescribed rotation speed corresponding to the instructed air volume and the applied voltage from the reference time prescribed rotation speed storage means 12,
The specified rotation speed correction means 8 corrects the selected rotation speed,
D so that the corrected specified speed and the operating speed are the same
The voltage applied to the C motor 2 is controlled. Then, the operation of the characteristic deviation discriminating means 8a is performed in the test mode when the ventilation device 19 is installed, and the execution result is the characteristic deviation storing means 8a.
The configuration is stored in c.

In the above structure, the characteristic deviation discriminating means 8a is provided by executing the test mode when the ventilation device 19 is installed.
Controls the maximum static pressure execution means 10 and applies a predetermined voltage to the DC motor 2 to operate the fan motor 1 in a substantially maximum static pressure state. Then, the ambient temperature detecting means 4
Based on the difference between the temperature of the air sucked in by the fan motor 1 and the reference temperature, this is the operating rotation speed of the reference DC motor stored in the reference comparison rotation speed storage means 7 at approximately the maximum static pressure. Correct the reference time comparison target rotation speed to the value at the detected ambient temperature, compare the temperature-corrected reference time comparison target rotation speed with the actual operating speed at approximately maximum static pressure, and compare the reference time comparison target rotation speed. If it is higher, the DC motor 2 this time determines that the commutation timing is the advanced phase, and determines the correction amount for negatively correcting the specified rotation speed stored in the reference-time specified rotation speed storage means 12, and vice versa. When the reference time comparison target rotation speed is lower, the DC motor 2 this time determines that the commutation timing is the delay phase, and corrects the specified rotation speed stored in the reference time specified rotation speed storage means 12 to be positively corrected. Determine the amount. The correction amount at this time is determined according to the difference between the temperature-compensated reference time comparison target rotation speed and the substantially maximum static pressure actual operating rotation speed. Then, the determined correction amount is stored in the characteristic deviation storage means 8c.
Memorized in. At this point, the test mode of the ventilation device 19 ends. Next, during normal operation, the temperature correction means 8b
When the atmosphere temperature detected by the atmosphere temperature detecting means 4 is higher than the reference temperature, a correction amount for positively correcting the specified rotation speed is determined. Conversely, when the detected atmosphere temperature is lower than the reference temperature, the specified rotation speed is set. Decide the correction amount to minus the number. The correction amount at this time is determined according to the difference between the detected ambient temperature and the reference temperature. And the air volume instruction means 13
And the applied voltage detecting means 18
By using the applied voltage value detected by the parameter as a parameter, a reference prescribed rotation speed is selected from the reference-time prescribed rotation speed storage means 12, and the selected prescribed rotation speed is set to the prescribed rotation speed correction means 8
Corrects the correction amount corresponding to the characteristic deviation stored in the characteristic deviation storage unit 8c in the test mode and the correction amount corresponding to the change in the air temperature determined by the temperature correction unit 8b. Next, the air volume control means 11 boosts the voltage applied to the DC motor 2 so that the specified rotation speed corrected by the specified rotation speed correction means 8 and the operating speed detected by the operating speed detecting means 9 match. Alternatively, the voltage is repeatedly lowered and controlled. Here, FIG. 2 shows the air volume-static pressure and air volume-rotation speed characteristics of the fan motor due to the influence of the characteristic deviation of the DC motor, and FIG. 3 shows the motor torque-rotation speed characteristic due to the influence of the characteristic deviation of the DC motor. Show. As is clear from the figure,
In the centrifugal fan motor, the load on the DC motor is lighter in the maximum static pressure state than in the static pressure zero state. Therefore, the characteristic deviation due to manufacturing variations becomes closer to the maximum static pressure state. The difference in the number of operating revolutions becomes remarkable. Further, the higher the voltage applied to the DC motor, the larger the difference in the operating speeds near the maximum static pressure. The smaller the amount of magnetic flux of the magnet of the magnet rotor, the higher the operating speed near the maximum static pressure. Due to the variation in the mounting position of the Hall IC, the energization phase becomes the delayed phase, the maximum static pressure becomes. The higher the operating speed in the vicinity, the lower the dynamic torque of bearings such as bearings, the higher the operating speed near the maximum static pressure, and the lower the resistance value of the armature winding, the closer the maximum static pressure. The operating speed of is slightly higher. Therefore, a fan motor equipped with a DC motor with a small amount of magnetic flux, a DC motor with a delayed phase, a DC motor with a small bearing dynamic torque, or a DC motor with a small resistance value of the armature winding is a fan equipped with a reference DC motor. Since it is possible to achieve the use point of the same instructed air volume and the same static pressure with respect to the motor with a low applied voltage, the specified rotation speed stored in the reference-time specified rotation speed storage means 12 is corrected to the plus side, or It is only necessary to select the specified rotation speed from the reference-time specified rotation speed storage means 12 using a value lower than the actually detected applied voltage as a parameter. Conversely, a DC motor with a large amount of magnetic flux, a DC motor with a lead phase, a DC motor with a large bearing dynamic torque, or a DC with a large resistance value in the armature winding.
A fan motor equipped with a motor requires a higher applied voltage at the point of use of the same indicated air volume and the same static pressure than a fan motor equipped with a reference DC motor. The specified standard speed stored in 1 is corrected to the negative side, or a value higher than the actually detected applied voltage is used as a parameter to define the standard standard speed storage means 1
It suffices to select the specified rotation speed from 2. Also,
FIG. 4 shows the air volume-static pressure and air volume-at the same indicated air volume and the same applied voltage when the ambient temperature is high and when the ambient temperature is low.
The rotation speed characteristic is shown. As is clear from the figure, the rotational speed is higher when the ambient temperature is higher than when the ambient temperature is low at the same instruction air volume and the same applied voltage.
Therefore, when the atmosphere temperature detected by the atmosphere temperature detecting means 4 is higher than the reference predetermined temperature, the standard rotation speed is corrected to the plus side, or a value lower than the actually detected applied voltage is set as a parameter at the reference time. Rotation speed storage means 12
It is sufficient to select the specified number of rotations from. On the contrary, if the detected ambient temperature is lower than the reference predetermined temperature,
It is only necessary to correct the specified rotation speed to the negative side or select the specified rotation speed from the reference specified rotation speed storage means 12 using a value higher than the actually detected applied voltage as a parameter.

According to the fan motor 1 and the ventilation device 19 of the first embodiment of the present invention as described above, the maximum static pressure execution means 1
0 makes the static pressure applied to the fan motor 1 substantially maximum, and based on the difference between the reference temperature and the temperature of the air sucked by the fan motor 1 detected by the ambient temperature detection means 4, the reference comparison target rotation speed storage means 7 The reference-time comparison target rotation speed, which is the operation rotation speed of the reference DC motor at the time of substantially maximum static pressure, is corrected to the detected ambient temperature value, and the temperature-corrected reference-time comparison target rotation speed is stored. By comparing the actual operating speed at the time of approximately maximum static pressure, the characteristic deviation determining means 8a causes the reference DC to vary due to variations in the resistance value during manufacture of the DC motor, the magnetic flux amount of the magnet, the mounting position of the Hall IC, and the like. By grasping the characteristic deviation from the motor and correcting the prescribed rotation speed by the specified rotational speed correction means 8 combining the characteristic deviation and the atmospheric temperature change, the characteristic variation of the DC motor 2 and the atmospheric temperature change. Without receiving the sound, constant operation can fan motor and ventilation device is obtained with an instruction air volume at high accuracy.

Further, since the maximum static pressure executing means 10 closes the suction side of the fan motor 1, it suppresses air leakage and turbulence at the casing tongue of the fan motor 1 and also produces vortices that circulate through the blade portion. Since the operating speed at the maximum static pressure does not fluctuate, the state of the characteristic deviation of the DC motor 2 can be grasped with high accuracy, and constant control can always be performed with respect to the indicated air volume with extremely high accuracy. A fan motor and ventilation system are obtained.

Further, since the maximum static pressure executing means 10 is not in a completely closed state, when the characteristic deviation discriminating means 8a grasps the state of the DC motor 2, the generation of an air flow reciprocating on the same surface of the fan blade is suppressed. Therefore, the generation of vibrations due to uneven rotation is suppressed, so that a fan motor and a ventilation device with low vibration can be obtained, and the operating rotation speed at the maximum static pressure does not vary, so that the characteristics of the DC motor 2 can be highly accurate. Since the state of the deviation can be grasped, it is possible to obtain the fan motor and the ventilation device that can constantly control the indicated air volume with extremely high accuracy.

The test mode for operating the characteristic deviation discriminating means 8a is periodically operated, for example, once a year, so that the dynamic torque due to a slight decrease in the bearing grease amount used in the DC motor 2 is obtained. Even if the characteristics of the DC motor change from the initial state due to physical factors such as a decrease in the amount of grease, a drastic decrease in the amount of grease, an increase in dynamic torque due to deterioration of grease, etc., the change can be detected permanently. In addition, a fan motor and a ventilation device that can perform constant control on the indicated air volume are obtained.

In a fan motor or a ventilation device installed in a substantially constant temperature and constant humidity environment such as a clean room, it is not necessary to provide a means for detecting the ambient temperature and correcting the specified rotation speed. There is no difference in the operation and effect of operating at a substantially constant air flow rate.

Although the DC motor 2 has a structure in which the Hall IC 5 for detecting the magnetic pole position is built in, it may be a structure of a sensorless drive type DC motor for detecting the magnetic pole position from the induced voltage or the like, and the action and effect are different. Does not occur.

Further, the control method in which the rotation speed selected from the reference-time rotation speed storage means 12 is directly added / subtracted to correct the rotation speed, the reference voltage is shifted to change the rotation speed to the specified rotation speed. It may be a method of selection, and there is no difference in its action and effect.

Although the reference comparison rotation speed is corrected to the detected ambient temperature value, the detected operating speed at the maximum static pressure may be corrected to the reference ambient temperature value.
It does not make a difference in its action and effect.

Further, although the reference-time specified rotation speed storage means 12 has a structure for storing the rotation speed itself, it may have a structure for storing a functional expression, and there is no difference in its operation and effect.

Further, in the case of the PWM drive system, the peak value after rectification and smoothing may be detected, and a value obtained by multiplying the detected peak value by the duty may be controlled as a voltage, so that there is no difference in the action and effect. If the peak value does not vary, the duty may be controlled as it is as a voltage.

Further, although the air supply port 19a of the ventilation device 19 is set to one place, it may be provided at any number of places, and if all of the provided air supply ports are closed, there will be no difference in the operation and effect.

When the characteristic deviation discriminating means 8a is operated, D
The value of the voltage applied to the C motor 2 may be determined from the noise allowed by the fan motor 1 or the ventilation device 19, but the higher the applied voltage, the more detailed the characteristic deviation can be recognized. Further, if the judgment is made by two kinds of applied voltages, the characteristic deviation can be recognized in more detail.

(Embodiment 2) As shown in FIG. 7, 20 is D
A centrifugal fan motor equipped with the C motor 2 is a ventilator 21 having the fan motor 20 built therein. 22 is D
The current detecting means for detecting the drive current of the C motor 2
For each air volume instructed by the air volume instructing means 13 at the reference temperature, the reference DC motor stores the number of rotations required for constant operation at the instructed air volume corresponding to a plurality of currents. It is a reference time prescribed rotation speed storage means. Other configurations are the same as those in the first embodiment, and detailed description thereof will be omitted.

In the above structure, the characteristic deviation discriminating means 8a is obtained by executing the test mode when the ventilation device 21 is installed.
Controls the maximum static pressure execution means 10 and applies a predetermined voltage to the DC motor 2 to operate the fan motor 20 in a substantially maximum static pressure state. Then, based on the difference between the temperature of the air sucked by the fan motor 1 by the ambient temperature detection means 4 and the reference temperature, the reference time comparison target rotation speed storage means 7 is provided.
The reference-time comparison target rotation speed, which is the operation rotation speed of the reference DC motor at the time of substantially maximum static pressure, is corrected to the detected ambient temperature value, and the temperature-corrected reference-time comparison target rotation speed is stored. Compared with the operating speed at the time of approximately maximum static pressure, if the reference comparison speed is higher, the DC motor 2 this time judges that the commutation timing is in the advanced phase, and uses the current as a reference time. When the correction amount for negatively correcting the specified rotation speed stored in the specified rotation speed storage means 23 is determined, and conversely, when the reference time comparison target rotation speed is lower, the DC motor 2 this time has a commutation timing delay phase. Then, the correction amount for positively correcting the specified rotation speed stored in the reference time specified rotation speed storage means 23 is determined. The correction amount at this time is determined according to the difference between the temperature-compensated reference time comparison target rotation speed and the substantially maximum static pressure actual operating rotation speed. Then, the determined correction amount is stored in the characteristic deviation storage means 8c. Here, the test mode of the ventilation device 21 ends. Next, during normal operation, when the atmosphere temperature detected by the atmosphere temperature detecting means 4 is higher than the reference temperature, the temperature correcting means 8b determines a correction amount for positively correcting the specified rotation speed, and detects it in reverse. When the ambient temperature is lower than the reference temperature, a correction amount for negatively correcting the specified rotation speed is determined. The correction amount at this time is determined according to the difference between the detected ambient temperature and the reference temperature. Then, an instruction air volume instructed by the air volume instruction means 13,
Using the current value detected by the current detection means 22 as a parameter, a reference prescribed rotation speed is selected from the reference-time prescribed rotation speed storage means 23, and the selected prescribed rotation speed is specified by the prescribed rotation speed correction means 8 in the test mode. Deviation storage means 8c
The correction amount corresponding to the characteristic divergence stored in ## EQU1 ## and the correction amount corresponding to the change in the air temperature determined by the temperature correction unit 8b are also corrected. Next, the air volume control means 11 boosts the voltage applied to the DC motor 2 so that the specified rotation speed corrected by the specified rotation speed correction means 8 and the operating speed detected by the operating speed detecting means 9 match. Alternatively, the voltage is repeatedly lowered and controlled.

According to the fan motor 20 and the ventilation device 21 of the present invention as described above, the maximum static pressure execution means 10 makes the static pressure applied to the fan motor 20 substantially maximum, and the fan motor 20 is sucked by the ambient temperature detection means 4. Based on the difference between the air temperature and the reference temperature, the reference time comparison target rotation speed, which is the operation rotation speed of the reference DC motor stored in the reference time comparison target rotation speed storage means 7 at substantially the maximum static pressure. Is corrected to a value at the time of the detected ambient temperature, and the temperature-corrected reference time comparison target rotation speed is compared with the substantially maximum static pressure operation rotation speed. By grasping the characteristic deviation from the reference DC motor due to variations in the resistance value, the amount of magnetic flux of the magnet, the mounting position of the Hall IC, etc., the specified rotational speed correction means 8 causes the characteristic deviation and the ambient temperature change. Because the combined amount for correcting the operating speed, without being affected by changes in the characteristic variation or ambient temperature of the DC motor 2, constant operation can fan motor and ventilation device is obtained with an instruction air volume at high accuracy.

Further, since the reference time specified rotation speed storage means 23 stores the current as a parameter, the DC motor 2
Even if the driving method of is high-voltage PWM, the value obtained by multiplying the crest value after rectification and smoothing by the duty is not used as a parameter, so that the resolution per bit of the microcomputer used is prevented from becoming coarse. It is possible to obtain a fan motor and a ventilation device that can perform a constant operation with an indicated air volume with high accuracy.

In the second embodiment, the reference comparison rotation speed is corrected to the value at the detected ambient temperature, but the detected operating speed at the maximum static pressure is corrected to the reference ambient temperature value. However, there is no difference in the action and effect.

[0052]

As is apparent from the above embodiments, according to the present invention, the maximum static pressure execution means sets the static pressure applied to the fan motor to a substantially maximum value and is stored in the reference time comparison target rotation speed storage means. By comparing the reference comparison target rotation speed, which is the operation rotation speed of the reference DC motor at substantially the maximum static pressure, with the operation speed at the substantially maximum static pressure, the characteristic deviation determination means is set to D.
The resistance value at the time of manufacturing the C motor, the magnetic flux amount of the magnet,
Reference DC due to variations in Hall IC mounting position
Since the specified rotational speed correction means corrects the specified rotational speed corresponding to the characteristic deviation based on the characteristic deviation from the motor, it is not affected by the characteristic fluctuation of the DC motor, and the cost of the air flow sensor, the differential pressure sensor, etc. is high. It is possible to obtain a fan motor and a ventilation device that can perform a constant operation with a high precision and an indicated air flow rate without using a sensor.

Further, the maximum static pressure execution means makes the static pressure applied to the fan motor substantially maximum, and based on the difference between the temperature of the air sucked by the fan motor by the ambient temperature detection means and the reference temperature, the reference time comparison rotation A comparison between the reference-time comparison target rotation speed, which is the operation rotation speed of the reference DC motor at substantially the maximum static pressure stored in the number storage means, and the operation rotation speed at the substantially maximum static pressure, under the same atmospheric temperature. By doing so, the characteristic deviation discriminating unit grasps the characteristic deviation from the reference DC motor due to variations in the resistance value at the time of manufacturing the DC motor, the magnetic flux amount of the magnet, the mounting position of the Hall IC, etc., and performs the specified rotation. Since the number correction means corrects the specified rotation speed by combining the characteristic deviation and the atmospheric temperature change, the air flow sensor and the differential pressure sensor are not affected by the characteristic variations of the DC motor and the atmospheric temperature change. Constant operation can fan motor and ventilation device is obtained with an instruction air volume with high precision without using an expensive sensor such as.

Further, since the reference time specified rotation speed storage means stores the current as a parameter, even if the drive system of the DC motor is high voltage PWM, a value obtained by multiplying the peak value after rectification and smoothing by the duty is used as a parameter. Therefore, the resolution per bit of the microcomputer used is prevented from becoming coarse, so that it is possible to obtain a fan motor and a ventilation device that can perform a constant operation with a high accuracy and with an indicated air volume.

Further, since the maximum static pressure execution means 10 closes the suction side of the fan motor 1, it suppresses air leakage and turbulence at the casing tongue of the fan motor 1 and also produces vortices circulating in the blade portion. Since the operating speed at the maximum static pressure does not fluctuate, the state of the characteristic deviation of the DC motor 2 can be grasped with high accuracy, and constant control can always be performed with respect to the indicated air volume with extremely high accuracy. A fan motor and ventilation system are obtained.

Further, since the maximum static pressure executing means does not completely close the state, when the characteristic deviation determining means grasps the state of the DC motor, it suppresses the generation of the air flow reciprocating on the same surface of the fan blade. Since the generation of vibrations due to uneven rotation is suppressed, a low-vibration fan motor and ventilation device can be obtained, and the operating speed at maximum static pressure does not vary, so the characteristic deviation of the DC motor can be accurately determined. Therefore, it is possible to obtain a fan motor and a ventilation device that can constantly control the indicated air volume with extremely high accuracy.

Further, by periodically operating the characteristic deviation discriminating means, the dynamic torque is reduced due to a slight decrease in the bearing grease amount used in the DC motor, the dynamic torque is greatly reduced, and the dynamic torque is reduced due to deterioration of the grease. Torque increase,
Even if the characteristics of the DC motor change from the initial state due to a physical factor, the change can be detected, so that a fan motor and a ventilation device that can perform constant control on the indicated air volume permanently can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a ventilation device equipped with a fan motor according to a first embodiment of the present invention.

FIG. 2 is a graph showing air volume-static pressure and air volume-rotation speed characteristics due to characteristic deviation of a DC motor mounted on the fan motor.

FIG. 3 is a graph showing a motor torque-rotational speed characteristic due to a characteristic deviation of a DC motor mounted on the fan motor.

FIG. 4 is a graph showing air volume-static pressure and air volume-rotation speed characteristics when the ambient temperature of the fan motor changes.

FIG. 5 is a view showing a table showing an example of stored contents of a reference time specified rotation speed storage means in the fan motor.

FIG. 6 is a diagram showing a table showing an example of correction contents of a specified rotation speed in the fan motor.

FIG. 7 is a block diagram showing a configuration of a ventilation device equipped with a fan motor according to a second embodiment of the present invention.

FIG. 8 is a graph showing air volume-static pressure and air volume-rotation speed characteristics due to a difference in energization phase in a conventional fan motor.

[Explanation of symbols]

1 fan motor 2 DC motor 3 magnet rotor 4 Ambient temperature detection means 5 hall IC 6 energization control means 6a Drive logic circuit 6b Switching element group 7 Reference time comparison target rotation speed storage means 8 Specified rotation speed correction means 8a Characteristic deviation discriminating means 8b Temperature correction means 8c Characteristic deviation storage means 9 Operating speed detection means 10 Maximum static pressure implementation means 11 Air volume control means 12 Reference time specified rotation speed storage means 13 Air volume instruction means 14a Air supply duct 14b exhaust duct 15 walls 16 Air supply damper 17 Armature winding 18 Applied voltage detection means 19 Ventilator 19a Air supply port 19b exhaust port 20 fan motor 21 Ventilator 22 Current detection means 23 Reference time specified rotation speed storage means

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3H021 AA01 AA10 BA06 BA11 BA20                       CA04 CA06 CA07 CA09 CA10                       DA04 EA05 EA10 EA12                 3H022 AA02 AA05 BA03 BA07 CA48                       CA50 DA09                 3H045 AA06 AA09 AA12 AA26 AA31                       BA19 BA28 BA31 CA09 CA19                       CA21 CA24 CA29 DA05 EA17                       EA20 EA26 EA36 EA38                 5H560 AA01 BB04 BB12 DA03 DA19                       DB02 DC05 GG04 JJ16 RR07                       TT15 XA04 XA12

Claims (8)

[Claims] 1. A fan motor equipped with a DC motor, comprising: position detecting means for detecting a magnetic pole position of a magnet rotor of the DC motor; and a signal from the position detecting means.
An energization control unit that controls energization of a plurality of armature windings of the DC motor, a rotation speed detection unit that detects an operation rotation speed of the DC motor from a signal output of the position detection unit, and an operation air volume of the fan motor. And a reference-time specified rotation for storing a specified specified number of rotations of a DC motor as a reference for a plurality of applied voltages in order to perform a constant operation at each air quantity instructed by the air-flow instruction means. Number storage means, maximum static pressure execution means for maximizing the static pressure applied to the fan motor, characteristic deviation determination means for determining the characteristic difference between the DC motor and the reference DC motor, and this characteristic deviation determination Based on the determination result of the means, the prescribed rotation speed correction means for correcting the prescribed rotation speed stored in the reference time prescribed rotation speed storage means, the corrected prescribed rotation speed and the rotation speed detection means are used. The air flow rate control means for controlling the voltage applied to the DC motor so that the detected operating speeds match, and a predetermined applied voltage is applied to the reference DC motor, and the maximum static pressure execution means is used for the fan. A reference time comparison target rotation speed storage means for storing an operating rotation speed when the static pressure applied to the motor is substantially maximized as a reference time comparison target rotation speed, and the characteristic deviation determination means applies a predetermined voltage to the DC motor. Of the operating speed and the reference time comparison target rotation speed stored in the reference time comparison target rotation speed storage means when a maximum voltage is applied to the fan motor by the maximum static pressure execution means by applying a voltage. A fan motor characterized by determining a correction amount for correcting a specified rotation speed from the difference. 2. A fan motor equipped with a DC motor, comprising: position detecting means for detecting a magnetic pole position of a magnet rotor of the DC motor; and a signal from the position detecting means.
An energization control unit that controls energization of a plurality of armature windings of the DC motor, a rotation speed detection unit that detects an operating rotation speed of the DC motor from a signal output of the position detection unit, and the fan motor are installed. Ambient temperature detection means for detecting the ambient temperature, the air volume instruction means for instructing the operating air volume of the fan motor, and at the time of the reference ambient temperature, in order to perform constant operation at each air volume instructed by the air volume instruction means, A reference time specified rotation speed storage means for storing a necessary specified rotation speed of a reference DC motor for each of a plurality of applied voltages; a maximum static pressure execution means for making a static pressure applied to the fan motor substantially maximum; A characteristic deviation discriminating means for discriminating a characteristic difference between the DC motor and the reference DC motor, a judgment result of the characteristic deviation discriminating means and the ambient temperature detecting means. A specified rotation speed correction means for correcting the specified rotation speed stored in the reference specified rotation speed storage means from the ambient temperature, and the corrected specified rotation speed and the operating rotation speed detected by the rotation speed detection means are the same. To control the applied voltage to the DC motor so that
At the reference ambient temperature, a predetermined applied voltage is applied to the reference DC motor, and the operating speed when the maximum static pressure execution means maximizes the static pressure applied to the fan motor is compared at the reference time. A reference time comparison target rotation speed storage means for storing as a rotation speed, the characteristic deviation determination means applies a predetermined applied voltage to the DC motor, and the maximum static pressure execution means determines a static pressure applied to the fan motor. The operating speed at the time of substantially maximum and the reference time comparison target rotation speed stored in the reference time comparison target rotation speed storage means are compared under the same atmospheric temperature condition, and the difference is defined from the rotation speed. A fan motor characterized by determining a correction amount for correcting a rotation speed. 3. A fan motor equipped with a DC motor, comprising: position detecting means for detecting a magnetic pole position of a magnet rotor of the DC motor; and a signal from the position detecting means.
An energization control unit that controls energization of a plurality of armature windings of the DC motor, a rotation speed detection unit that detects an operating rotation speed of the DC motor from a signal output of the position detection unit, and a current detection that detects a current. Means, an air volume instruction means for instructing an operating air volume of the fan motor, and a prescribed number of rotations required for the reference DC motor for performing a constant operation at each air volume instructed by the air volume instruction means. A reference time specified rotational speed storage means for storing each time, a maximum static pressure execution means for maximizing static pressure applied to the fan motor, and a characteristic deviation for discriminating a characteristic difference between the DC motor and the reference DC motor. A discriminating means, and a prescribed rotational speed correction means for compensating the prescribed rotational speed stored in the reference time prescribed rotational speed storage means based on the determination result of the characteristic deviation discriminating means,
Air volume control means for controlling the voltage applied to the DC motor so that the corrected specified rotation speed and the operating rotation speed detected by the rotation speed detection means match, and the reference DC motor at the reference ambient temperature. A reference time comparison target rotation speed memory that stores an operating rotation speed when the maximum static pressure execution means makes the static pressure applied to the fan motor substantially maximum as a reference time comparison target rotation speed The characteristic deviation determining means applies a predetermined applied voltage to the DC motor, and the maximum static pressure execution means makes the static pressure applied to the fan motor substantially maximum and the operating speed and the reference time. A fan motor for determining a correction amount for correcting a specified rotation speed from a difference from a reference comparison rotation speed stored in a comparison rotation speed storage means. 4. A fan motor equipped with a DC motor, comprising: position detecting means for detecting a magnetic pole position of a magnet rotor of the DC motor; and a signal from the position detecting means.
An energization control unit that controls energization of a plurality of armature windings of the DC motor, a rotation speed detection unit that detects an operating rotation speed of the DC motor from a signal output of the position detection unit, and the fan motor are installed. The ambient temperature detecting means for detecting the ambient temperature, the current detecting means for detecting the current, the air volume instruction means for instructing the operating air volume of the fan motor, and the air volume instruction means for instructing the reference air temperature. In order to perform a constant operation at each air volume, a reference time specified rotation speed storage unit that stores a necessary specified rotation speed of a reference DC motor for each of a plurality of currents, and a static pressure applied to the fan motor is set to a maximum. Maximum static pressure implementation means,
Based on the characteristic deviation discriminating means for discriminating the characteristic difference between the DC motor and the reference DC motor and the judgment result of the characteristic deviation discriminating means and the ambient temperature detected by the ambient temperature detecting means, the reference prescribed rotation speed storage The specified rotation speed correction means for correcting the specified rotation speed stored in the means, and the applied voltage to the DC motor are controlled so that the corrected specified rotation speed and the operating rotation speed detected by the rotation speed detection means match. And a predetermined applied voltage to the reference DC motor at the reference ambient temperature,
And a reference time comparison target rotation speed storage means for storing the operating speed when the static pressure applied to the fan motor is substantially maximized as the reference time comparison target rotation speed. The means applies a predetermined applied voltage to the DC motor, and the operating speed when the maximum static pressure execution means maximizes the static pressure applied to the fan motor and the reference rotation speed storage means stores the operating speed. A fan motor characterized by comparing the reference comparison target rotation speed under the same ambient temperature condition and determining a correction amount for correcting the specified rotation speed from the difference in the rotation speed. 5. The fan motor according to claim 1, wherein the maximum static pressure execution means controls the suction side of the fan motor to a substantially closed state. 6. The fan motor according to any one of claims 1 to 5, wherein the maximum static pressure execution means is not in a completely closed state. 7. The fan motor according to claim 1, wherein the characteristic deviation discriminating means operates periodically. 8. A ventilation device equipped with the fan motor according to claim 1.