JP5489380B2 - Range hood operation control device - Google Patents

Description

  The present invention relates to an operation control device for a range hood that controls rotation of the fan of the range hood so that the range hood is operated strongly, intermediately, or weakly.

As a range hood, it is common to provide a blower in the hood and drive the blower to collect oil smoke generated during cooking in the hood and discharge it outdoors.
In such a range hood, it is generally known that a fan is rotated by an electric motor as a blower and the operation of the range hood is controlled by controlling the rotation of the fan.
For example, as disclosed in Patent Document 1, a switch is attached to the front surface of the hood. This switch has a plurality of operation buttons, for example, a strong button, a middle button, a weak button, and a cut button. When the strong button is pressed, the electric motor is driven at a high speed stage, the fan rotates at a high speed, and the range hood Strong driving.
Similarly, when the middle button and the weak button are pressed, the electric motor is driven at the medium speed stage and is driven at the low speed stage, and the fan is rotated at the medium speed and the low speed, so that the range hood is in the medium operation and the weak operation.
When the cut button is pressed, the electric motor is stopped, the fan is also stopped, and the range hood is stopped.

JP-A-10-132351

The blower used for the conventional range hood mentioned above attaches a fan to the motor shaft of an electric motor, and rotates a fan with the motor shaft.
For this reason, when the rotation of the motor shaft of the electric motor is rapidly increased, an abnormal torsion torque is generated in the fan or the motor shaft, which may damage the fan or the motor shaft.

For example, if the middle button is pressed immediately after pressing the weak button of the switch described above, the state before the electric motor is rotated at a low speed corresponding to the low speed stage, that is, the electric motor is lower than the low speed rotation described above. Since the rotation speed is changed from the slow rotation state to the medium speed step, the electric motor changes rapidly compared to the case where the electric motor changes from the low speed rotation state to the medium speed rotation. The rotation of the suddenly becomes faster.
In other words, if the button faster than that button is pressed before it reaches a steady state that rotates at a rotational speed corresponding to the speed step corresponding to the button operated by the electric motor, the motor shaft of the electric motor rotates. It gets faster and faster.

  The object of the present invention is to increase the rotational speed of the electric motor rapidly even if there is a new input of the operation signal before the actual operation state of the electric motor reaches the operation state corresponding to the currently input operation signal. In other words, the operation control device of the range hood is configured so that abnormal torsional torque is not generated and damaged in the fan and the motor shaft.

The present invention includes a hood 1, a blower 10 having a fan 12 attached to a motor shaft 11a of an electric motor 11, a plurality of operation buttons, and a switch that outputs an operation signal by operating any one of the operation buttons. 20 and a motor control device 30 that drives and controls the electric motor 11 in response to an operation signal output from the switch 20 to be in any one operation state,
A range hood configured to discharge air in the hood 1 by rotating the fan 12 with the electric motor 11,
The motor control device 30 includes a measuring unit 37 that measures an elapsed time from when a previous operation signal is input to when a new operation signal is input, and when the measured elapsed time is smaller than a set fixed time. A comparison operation unit 39 for calculating a difference between the predetermined time and the measured elapsed time;
When the elapsed time measured by the measuring means 37 is greater than a certain time when an operation signal that is one step faster than the currently input operation signal is input, the motor control device 30 11 is immediately driven at a rotational speed corresponding to the newly input operation signal, and when the elapsed time measured by the measuring means 37 is smaller than a certain time, the certain time calculated by the comparison calculation unit 39 is The electric motor 11 is continuously driven at a rotation speed corresponding to the currently input operation signal for a time corresponding to the difference in elapsed time, and the electric motor 11 is newly input after the time corresponding to the difference has elapsed. The operation control device for a range hood is characterized by being driven at a rotational speed corresponding to the operation signal .

According to the present invention, when one of the operation buttons of the switch 20 is operated and then the operation button that is one step faster is immediately operated, the electric motor 11 has a rotation speed corresponding to the currently input operation signal. Since the rotation speed corresponds to the newly input operation signal after the rotation, the rotation of the motor shaft 11a of the electric motor 11 does not rapidly increase, and an abnormal torsion torque is generated in the fan 12 and the motor shaft 11a. There is no damage.
In addition, when the elapsed time is longer than the set fixed time, the electric motor 11 is immediately driven at a rotational speed corresponding to the newly input operation signal, so that the electric motor 11 is not continuously driven. It is possible to switch to the target speed.

It is the whole range hood partly broken side view which shows embodiment of this invention. It is a schematic explanatory drawing of the control apparatus of an electric motor. It is explanatory drawing which shows embodiment of the motor control apparatus of this invention.

As shown in FIG. 1, the range hood of the present invention includes a hood 1, a blower 10, and a switch 20. By operating the switch 20 to drive the blower 10, oil smoke generated during cooking is hooded together with air. Collect in 1 and discharge outdoors.
The blower 10 attaches a fan 12 to the motor shaft 11a of the electric motor 11, and drives the electric motor 11 to rotate the fan 12 together with the motor shaft 11a to operate the range hood.
As shown in FIG. 2, the switch 20 includes a plurality of operation buttons for selecting the operation state of the range hood, for example, a weak button 21, a middle button 22, a strong button 23, and an off button 24, and any one of the operation buttons. Is operated to input a driving signal to the motor control device 30.

The motor control device 30 drives and controls the electric motor 11 according to the input operation signal, and sets the range hood to any one operation state.
For example, when a weak operation signal is input to the motor control device 30 by operating the weak button 21, the electric motor 11 is rotated at a low speed corresponding to the low speed stage, and the fan 12 is rotated at a low speed to weaken the range hood. Let's drive.
Similarly, by operating the middle button 22 that is one step faster than the weak button 21 and the strong button 23 that is one step faster than the middle button 22, the middle driving signal and the middle driving signal that are one step faster than the weak driving signal. However, when a strong operation signal that is one step faster is input to the motor control device 30, the electric motor 11 is rotated at a medium speed and a high speed corresponding to the high speed stage, and the fan 12 is rotated at a medium speed and a high speed. Then, the range hood is set to medium driving and strong driving.
When the off button 24 is operated, a stop signal is input to the motor control device 30 to stop the electric motor 11, stop the fan 12, and stop the operation of the range hood.

The switch 20 shown in FIG. 2 has an illumination button 25, and when the illumination button 25 is operated, a lamp (not shown) is turned on.
The switch 20 described above is not limited to the push button type, and may be a touch type or a remote control switch.

The range hood shown in FIG. 1 will be described in detail.
The hood 1 has a box shape in which a lower surface is opened by an upper surface plate 2 and a peripheral surface plate 3, and a filter 4 and a current plate 5 are provided in the hood 1.
In the blower 10, a fan 12 is provided in a casing 13, and the fan 12 is attached to a motor shaft 11 a of an electric motor 11 provided in the casing 13.
The blower 10 is provided in the hood 1, and rotates the fan 12 to suck air from the suction port 14 and discharge it to the discharge duct 15.
The switch 20 is attached to the front surface 3 a of the peripheral plate 3.
The operation control device of the present invention is not limited to the range hood shown in FIG. 1 described above, and it is needless to say that the operation control device can be applied to various conventionally known range hoods.

As shown in FIG. 3, the motor control device 30 includes a control unit 31 to which various operation signals are input from the switch 20, and an interface unit 32 to which a speed stage control signal is input from the control unit 31. .
The control unit 31 performs various controls on the input operation signal, and outputs a speed stage control signal (speed adjustment control signal) to the interface unit 32.
The interface unit 32 outputs a speed stage command (modulation command) so that the speed stage corresponds to the input speed stage control signal, and drives the electric motor 11 at a rotational speed corresponding to a predetermined speed stage. In this way, the drive current is supplied to drive the electric motor 11 at a rotational speed corresponding to a predetermined speed stage.
The motor control device 30 of the present invention is not limited to the above-described one, and may be any device that performs the operations described below.

As shown in FIG. 3 , the motor control device 30 (control unit 31) includes an operation signal switching time measurement unit 37 that measures an input time interval of an operation signal, a constant time setting unit 38, and the measurement unit 37. The comparison operation unit 39 calculates the difference between the switching time measured in step 1 and a fixed time.

The motor control device 30 performs the following operation.
An operation signal is input from one operation button of the switch 20, and the current operation of the switch 20 is performed while the electric motor 11 is driven at a rotation speed corresponding to the operation signal and the range hood is operated. When the operation button that is one step faster than the button is newly operated and the currently input operation signal is switched to the operation signal that is one step faster (that is, when the operation button of the switch 20 is switched), Elapsed time from when the previous operation button is operated by the measuring means 37 (when the current operation signal is input) to when the current operation button is operated (when a new operation signal is input), That is, the operation signal switching time is measured.

The comparison calculation unit 39 determines whether the elapsed time is longer than the predetermined time set in the setting unit 38. If the elapsed time is smaller than the predetermined time, the difference (time) between the fixed time and the elapsed time is calculated. To do.
The electric motor 11 is continuously driven at a rotational speed corresponding to the currently input operation signal for a time corresponding to the calculated difference.
After elapse of the time difference described above, the electric motor 11 is driven at a rotational speed corresponding to the newly input operation signal.
The predetermined time is a time for the electric motor 11 to increase to a rotation speed corresponding to the operation signal after the operation signal is input.

For example, when the weak button 21 of the switch 20 is operated and a weak driving signal is input to the control unit 31, the middle button 22 is operated and the intermediate driving signal is input to the control unit 31. The time from the input of the weak operation signal to the input of the medium operation signal (the above-mentioned elapsed time) is measured by the measuring means 27.
The measured elapsed time and the fixed time set by the setting unit 38 are compared by the comparison calculation unit 39. If the elapsed time is smaller than the fixed time, the difference between the fixed time and the elapsed time is detected.
Then, the control unit 31 continuously outputs the low speed stage control signal for a time corresponding to the calculated difference, and continuously drives the electric motor 11 at a low speed corresponding to the low speed stage suitable for the weak operation. .
After a time corresponding to the difference elapses, the control unit 31 inputs a medium speed stage control signal to the interface unit 32 and drives the electric motor 11 at a medium speed corresponding to the medium speed stage.
When the middle button 22 of the switch 20 is operated to drive the electric motor 11 at a medium speed corresponding to the medium speed stage, the strong button 23 is operated in the same manner as described above.

In this way, when one of the operation buttons of the switch 20 is operated and then the operation button that is one step faster is immediately operated, the electric motor 11 rotates at a speed corresponding to the currently input operation signal. Since the rotation speed corresponding to the newly input operation signal is reached, the rotation of the motor shaft 11a of the electric motor 11 does not rapidly increase, and an abnormal torsion torque is generated in the fan 12 and the motor shaft 11a. Will not be damaged.
In addition, when the elapsed time is longer than the set fixed time, the electric motor 11 is immediately driven at a rotational speed corresponding to the newly input operation signal, so that the electric motor 11 is not continuously driven. It is possible to switch to the target speed.

  DESCRIPTION OF SYMBOLS 1 ... Hood, 10 ... Blower, 11 ... Electric motor, 11a ... Motor shaft, 12 ... Fan, 20 ... Switch, 21 ... Weak button, 22 ... Middle button, 23 ... Strong button, 30 ... Motor control device, 37 ... Measurement Means 39... Comparison operation unit.

Claims (1)

A hood 1, a blower 10 in which a fan 12 is attached to a motor shaft 11 a of an electric motor 11, a switch 20 having a plurality of operation buttons and outputting an operation signal by operating any one of the operation buttons, A motor control device 30 that drives and controls the electric motor 11 in response to an operation signal output by the switch 20 to be in one of the operation states;
A range hood configured to discharge air in the hood 1 by rotating the fan 12 with the electric motor 11,
The motor control device 30 includes a measuring unit 37 that measures an elapsed time from when a previous operation signal is input to when a new operation signal is input, and when the measured elapsed time is smaller than a set fixed time. A comparison operation unit 39 for calculating a difference between the predetermined time and the measured elapsed time;
When the elapsed time measured by the measuring means 37 is greater than a certain time when an operation signal that is one step faster than the currently input operation signal is input, the motor control device 30 11 is immediately driven at a rotational speed corresponding to the newly input operation signal, and when the elapsed time measured by the measuring means 37 is smaller than a certain time, the certain time calculated by the comparison calculation unit 39 is The electric motor 11 is continuously driven at a rotation speed corresponding to the currently input operation signal for a time corresponding to the difference in elapsed time, and the electric motor 11 is newly input after the time corresponding to the difference has elapsed. An operation control device for a range hood, which is driven at a rotational speed corresponding to the operation signal.

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