JP2575433B2 - Fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a fan provided with a human detection sensor.

(Prior Art) Some recent electric fans have a human detection sensor and a control device, and the control device drives and controls a blade driving motor based on a human detection signal from the human detection sensor. Has been provided. Note that the blowing operation performed based on the human detection sensor is hereinafter referred to as a sensor operation.

This sensor operation is performed as follows. That is,
The detection element in this kind of human detection sensor is, for example, a pyroelectric infrared detection element, and the electrical output changes when the movement of a person changes and the temperature of the surface of the element that absorbs infrared light changes. . Therefore, the human detection sensor outputs a human detection signal based on the change in the electrical output. That is,
The human detection sensor detects a person based on a change in the motion of the person. In the case of such a human detection method, if the motor is driven only during the time when the human detection signal is output, there is an inconvenience that when the person stops after moving, the motor is not driven in the stationary state and the blowing operation is not performed. .

Therefore, in this type of electric fan, when a human detection signal is output, the motor is delayed and driven with a certain time margin (about 30 seconds to several minutes) from that point. In this case, when the human detection signal is output again during the driving of the motor, the motor is newly driven for a predetermined time from that point. At that time, since the person usually moves frequently, the human detection signal is output frequently, so that while the person is present in the room where the electric fan is installed, the motor is in a continuous operation state,
When the person is absent, the blowing operation is stopped.

(Problems to be Solved by the Invention) Incidentally, in the electric fan, for example, at the time of bedtime, in order to automatically stop the blowing operation after a certain period of time, a timer switch as time setting means is provided. Although the execution time is set, even when the above-described sensor operation is executed, it is conceivable that the sensor operation is time-controlled by a timer switch. However,
In this case, since the person goes to bed, the movement of the person is considerably smaller than in the normal case, and therefore, the frequency of the output of the human detection signal by the human detection sensor decreases. In other words, it is expected that the time interval between the output of the human detection signal becomes longer and the stop time of the motor becomes longer. In this case, since the operation is the sensor operation, air can be blown in accordance with the movement of the sleeping person (blowing when the sleeping person moves due to turning over), but conversely, the sleeping person on the floor does not move and the air blowing stops immediately. There is a possibility that the cooling effect due to the original ventilation is reduced and discomfort is increased.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fan that can supply an appropriate air volume and reduce discomfort when time-controlled sensor operation is performed. .

[Configuration of the Invention] (Means for Solving the Problems) The present invention provides a motor for driving a blade, a human detection sensor that detects a human motion and outputs a human detection signal, and a human detection using the human detection sensor. A drive command means for outputting a motor drive command signal for a predetermined time from the time when a signal is given, and a control for driving a motor in accordance with the presence / absence of the motor drive command signal to execute sensor operation Equipment and
The control device includes time setting means for setting an operation execution time, and the control device inputs the motor drive command signal when the sensor operation is to be performed in a state where there is no input from the time setting means. The motor is driven with "Yes" and the drive of the motor is stopped with "No". When there is an input from the time setting means and the sensor operation is to be performed, the input of the motor drive command signal is "Yes". The present invention is characterized in that the motor is driven and the rotational speed of the motor is set lower than the motor rotational speed when the input is "absent" when the input is "absent".

(Operation) According to the above-described means, when the sensor operation is normally performed (when the operation execution time is not set by the time setting means), the control device determines whether the motor drive command signal is input and the motor is “present”. And stops the drive when the input is “absent”. This normal sensor operation is generally performed in the daytime or the like. Therefore, when a person is present in the room where the electric fan is installed, there are many changes in the movement of the person, and as a result, the output of the person detection signal is output. Since the frequency is high and the motor drive command signal is continuously output,
If a person is present, the motor is in a continuous operation state, and if no person is present, the driving of the motor is stopped.

Also, when the time setting means is operated for bedtime and the input is in the control device and the sensor operation is performed, the control device drives the motor in response to the input of the motor drive command signal "Yes". When the input is “absent”, the motor rotation speed is set lower than the motor rotation speed when the input is “present”. Since the sensor operation in this case is a case where the user goes to bed, the output frequency of the human detection signal is low and the output frequency of the motor drive command signal is low, but the motor is not operated during the time period when the motor drive command signal is not output. Since the rotation speed is controlled to be low, the airflow is continued although the airflow is small, so that the discomfort caused by immediately stopping the airflow can be eliminated.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

First, in FIG. 2, 1 is a base, 2 is a column erected on the base 1, 3 is a housing formed at the base of the column 2,
Reference numeral 4 denotes a fan head provided on the upper part of the support 2. The fan head 4 is provided with a blade driving motor 5 (see FIG. 1).
, A blade 7 rotatably driven by the motor 5, and a protection net 8. Reference numeral 9 denotes a detection element of a human sensor, which will be described later. This detecting element 9 is composed of a pyroelectric infrared detecting element, which changes its electric output when the temperature of the surface of the detecting element 9 that absorbs infrared light changes due to a change in the movement of a person. Things. As shown in FIG. 3, an operation unit 10 is provided on the upper surface of the base 1, and the operation unit 10 includes an air volume changeover switch 11 also serving as a manual operation start switch, a sensor operation start switch 12, A timer switch 13 and an operation stop switch 14 as time setting means for setting the operation time are provided. In addition, the operation unit 10 is provided with air volume display lamps 15 to 17 for displaying a set air volume, a display lamp 18 for sensor operation display, and set time display lamps 19 to 22.

Next, in FIG. 1, reference numeral 23 denotes a human detection sensor, which includes the detection element 9, an amplification circuit 24, and a comparison circuit 25. In this human detection sensor 23, the amplification circuit 24 amplifies the electric signal output from the detection element 9, and the comparison circuit 25 compares the amplified signal provided from the amplification circuit 24 with a reference value and based on the comparison result. A human detection signal Ss is output. The human detection sensor 23 changes its output when the detection element 9 changes in the movement of the person. Therefore, when there is a change in the movement of the person, a palace-shaped person detection signal Ss (fourth signal) is output. Figure (a) and Figure 5 (a)
Output). Reference numeral 26 denotes a control device having a control circuit 27, a timer circuit 28 as drive command means, and a drive circuit 29. In the control device 26, the control circuit 27 is configured to execute a manual operation and a sensor operation,
In this case, when there is a time setting input from the timer switch 13, the execution time of each operation is set. When the human detection signal Ss is given from the human detection sensor 23, the timer circuit 28 outputs a motor drive command signal Sm for a predetermined time T from that time. The drive circuit 29 includes a high-speed drive unit 29a, a medium-speed drive unit 29b, and a low-speed drive unit 29c. In response to the "strong", "medium" and "weak" air flow rates set by the air flow rate changeover switch 11, the control circuit 27 selectively sends control signals to the drive units 29a, 29b and 29c, respectively. Each of the drive units 29a, 29b, and 29c controls the cutoff of the motor 5 based on the control signal, and sets the rotation speed to “high”, “medium”,
"Low".

Note that the manual operation performed by the control circuit 27 is started when an input from the air volume changeover switch 11 is received. In this operation, the control circuit 27 continuously drives the motor 5 via the drive circuit 29. In this case, the motor 5 is driven at a rotational speed corresponding to the set air volume.

Here, the control device 26 performs the sensor operation,
When there is an input from the sensor operation start switch 12 in a state where there is no input from the timer switch 13, and when there is an input from the timer switch 13 and the sensor operation start switch 12
The configuration is such that the drive mode for the motor 5 is different from when there is an input from That is, when there is no input from the timer switch 13, the sensor operation start switch
When there is an input from 12, the motor 5 is driven at the set circuit speed by the input of the motor drive command signal Sm from the timer circuit 28, and the drive of the motor 5 is stopped by the input "no". on the other hand,
When there is an input from the timer switch 13 and an input from the sensor operation start switch 12, the motor 5 is driven at the set rotation speed by the input “Yes” of the motor drive command signal Sm from the timer circuit 28. When the input is "absent", the rotation speed of the motor 5 is set lower than the set speed. For example, when the motor drive command signal Sm input is “present”, the rotation speed is “high”
If the air volume is “strong” or “medium” (the air volume is “medium”), the rotation speed is set to “low”. The respective setting instructions are shown in FIGS. 4 and 5.

 Now, the operation of the above configuration will be described.

First, a case will be described where there is an input from the sensor operation start switch 12 in a state where there is no input from the timer switch 13, that is, a case where the sensor operation is normally executed. This normal sensor operation is often performed other than at bedtime, that is, in a situation where a person is active. Thus, when the human detection signal Ss is output from the human detection sensor 23, the motor drive command signal is output from the timer circuit 28 in synchronization with the output from the timer circuit 28 for a predetermined time T.
Sm is output and provided to the control circuit 27. The control circuit 27 drives the motor 5 at the set circuit speed when the motor drive command signal Sm is input “Yes”, and stops driving the motor 5 when the signal Sm is input “No”. In this case, since the change frequency of the motion of the person is quite high, the output frequency of the human detection signal Sm is also high.
Sm is output, and the motor 5 enters a continuous operation state. Therefore, when a person is present in the room where the electric fan is set, continuous air is blown, and when no person is present, the air is stopped.

Next, when the timer switch 13 is operated for bedtime and its input is in the control circuit 27 and there is an input from the sensor operation start switch 12, the human detection signal Ss is output from the human detection sensor 23. When output, the motor drive command signal Sm is output from the timer circuit 28 at the time according to the predetermined time T in synchronization with the output, and the control circuit 27 is given. The control circuit 27
The motor 5 is driven at the set circuit speed when the command signal Sm is input “present”, and the rotational speed of the motor 5 is reduced when the input is “no”. In this case, the output frequency of the human detection signal Ss is also low because the change frequency of the movement of the sleeping person is quite low. However, as can be seen from FIG. 4 (c), when the set circuit speed is “high” (the air flow is “strong”), the rotation speed of the motor 5 is set to “even” even when there is no input from the motor drive command signal Sm. Since the motor 5 is set to "low" to drive the motor 5 and there is no stoppage of the air flow, and the air volume is reduced appropriately, the air can be blown in accordance with the movement of the user (sleeping person) and the user can hit the wind. Not only can the overshoot be reduced by suppressing the air volume, but also the discomfort caused by stopping the air blowing can be reduced.
Also, as can be seen from FIG. 5 (c), the set circuit speed is "medium".
Even when the air volume is “medium”, in the situation where there is no input from the motor drive command signal Sm, the rotation speed of the motor 5 is set to “low” and the motor 5 is driven.
Moreover, the air volume is reduced appropriately.

When the operation execution time set by the timer switch 13 elapses, the sensor operation is stopped.

In the above embodiment, when the initially set circuit speed is "high", the rotation speed is reduced to "low" two ranks lower. May be dropped.

In addition, the present invention is not limited to the above embodiment, and can be variously modified and implemented without departing from the gist.

[Effects of the Invention] As is clear from the above description, the present invention provides a motor for driving a blade, a human detection sensor that detects a human motion and outputs a human detection signal, and a human detection using the human detection sensor. A drive commanding means for outputting a motor drive command signal for a predetermined time from a point in time when a signal is given, control for driving a motor according to the presence or absence of the input of the motor drive command signal and executing sensor operation Device, and time setting means for setting an operation execution time in the control device, wherein the control device is configured to execute the motor drive command when the sensor operation is to be performed in a state where there is no input from the time setting device. The motor is driven when the signal is input and the motor is stopped when the signal is not input. When there is an input from the time setting unit and the sensor operation is to be performed, the motor drive command signal is output. It is characterized in that the motor is driven with the input "Yes" and the rotational speed of the motor is set lower than the motor circuit speed in the case of the input "Yes" with the input "No". When the sensor operation is controlled to be limited at the time of going to bed or the like, it is possible to supply an appropriate amount of air and to perform air blowing according to the movement of the user (sleeping person), as well as to stop air blowing immediately. It has an excellent effect of eliminating discomfort.

[Brief description of the drawings]

1 shows an embodiment of the present invention, FIG. 1 is a block diagram of an electric configuration, FIG. 2 is a side view of an electric fan, FIG. 3 is a plan view of an operation portion, FIG. 4 and FIG. It is a figure which shows the output situation of a human detection signal, the output situation of a motor drive command signal, and the setting situation of rotation speed at the time of sensor operation by limit control. In the figure, 5 is a motor, 7 blades, 9 is a detection element, 12 is a sensor operation start switch, 13 is a timer switch (time setting means), 23 is a human detection sensor, 26 is a control device, 27 is a control circuit, 28 Denotes a timer circuit (drive command means).

Claims (1)

(57) [Claims] A motor for driving a blade, a human detection sensor for detecting a motion of a human and outputting a human detection signal, and when a human detection signal is given by the human detection sensor, a predetermined time from that time. A control device that has a drive command unit that outputs a motor drive command signal, and that performs a sensor operation by driving and controlling a motor according to the presence or absence of the input of the motor drive command signal;
The control device includes time setting means for setting an operation execution time, and the control device inputs the motor drive command signal when the sensor operation is to be performed in a state where there is no input from the time setting means. The motor is driven with "Yes" and the drive of the motor is stopped with "No". When there is an input from the time setting means and the sensor operation is to be performed, the input of the motor drive command signal is "Yes". An electric fan, characterized in that the motor is driven to set the rotational speed of the motor at an input of “absent” to be lower than the motor rotational speed at the time of an input of “presence”.