JPH0730755B2 - Fan - Google Patents

Description

Description: [Object of the Invention] (Field of Industrial Application) The present invention relates to a fan for detecting the presence of a person and controlling the swinging motion of the head.

(Prior Art) In a conventional fan in which the head can swing, a swing-dedicated motor is used to operate the swing mechanism, and a fan motor is used to operate the swing mechanism. In the former, the swinging motion is started or stopped by operating the switch of the swinging motor, and in the latter, it is provided between the blower motor and the swinging mechanism. The swinging motion is started or stopped by operating the knob that opens and closes the clutch.

(Problems to be Solved by the Invention) By the way, when the head swing motion is started, the swing motion is continuously performed, and the direction of the air blown by the blades changes from moment to moment. It may receive wind for only time, and it may not be enough to cool off.However, if you stop the swinging motion and focus on the wind, it will be noisy while you are hitting it for a long time. I may feel. In such a case, it is necessary to make the oscillating motion or stop the oscillating motion, but it is troublesome since the switch and the knob must be operated each time.

The present invention has been made in view of the above circumstances, and an object of the present invention is to stop the oscillating motion and intensively send wind to a person without performing an operation for starting and stopping the oscillating motion. Another object of the present invention is to provide a fan capable of automatically repeating the operation of restarting the swing motion.

[Structure of the Invention] (Means for Solving the Problems) The fan of the present invention is a fan in which the head can swing, and a human sensor is provided on the head, and based on the detection signal of the human sensor. The present invention is characterized in that a control means is provided for restarting the swing motion of the head after stopping the swing motion of the head for a certain period of time from the detection of the presence of a person.

(Operation) When the presence of a person is detected based on the detection signal of the person sensor,
From that point, the head swing motion is stopped for a certain period of time, and the air is intensively blown toward the person, and then the head starts the swing motion again.

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

First, in FIG. 4, reference numeral 1 is a base, and a neck support 3 is attached to the upper end of a pillar 2 standing on the base, and a neck piece 4 is vertically rotated by a shaft 5 on the neck support 3. It is movably supported. Reference numeral 6 denotes a head supported on the neck piece 4 by a stud 7 so as to be rotatable left and right. The head 6 has a substantially inverted L-shaped motor case 8, and a blower motor 9 housed and arranged above the motor case 8. It consists of the blade 10 attached to the rotating shaft 9a of the blower motor 9,
The blade 10 is covered by a guard 11 attached to the motor case 8. Reference numeral 12 denotes a swing mechanism housed and arranged in the lower part of the motor case 8. This mounts a motor mount 13 on the stud 7, and mounts it on a rotary shaft 14a of a swing motor 14 arranged on the motor mount 13. Install the crank 15 and link 16 between the crank 15 and the neck piece 4.
It is of a well-known structure that is connected by. Reference numeral 17 denotes a human sensor including, for example, a pyroelectric infrared sensor, which is attached to the front portion of the lower end base portion 8a of the motor case 8 of the head portion 6. The human sensor 17 is configured to output a detection signal when the temperature of the surface that absorbs infrared rays changes, and detects the presence of a person by utilizing the fact that the surface temperature changes when a person moves. The detection range of the human sensor 17 is set to be an appropriate range in each of the up, down, left and right directions so that the presence of a person in front of the head 6 can be detected.
The detection signal of the human sensor 17 is the control means shown in FIG.
Entered in 18.

Here, to explain the configuration of the control means 18 with reference to FIG.
Reference numeral 19 denotes an amplifier circuit, and the detection signal Sa of the human sensor 17 is amplified by the amplifier circuit 19 and input to the comparison circuit 20. The comparison circuit 20 compares the amplified signal Sb input from the amplification circuit 18 with a reference value, and outputs the person detection signal Sc when the amplified signal Sb exceeds the reference value. Reference numeral 21 is a timer circuit, which constantly outputs the operation signal for t ₁ seconds and outputs the stop signal for t ₂ seconds alternately and alternately. Then, the timer circuit 21 receives the human detection signal from the comparison circuit 19 when the operation signal is output.
When it receives Sc, it is invalidated, and when the human detection signal Sc is received from the comparison circuit 19 at the time of outputting the stop signal, the stop signal is again issued for t ₃ seconds (longer than t ₂ seconds) from that point. It is designed to output. Reference numeral 22 is a control circuit, which energizes the swing motor 14 during the operation signal is input from the timer circuit 21, and disconnects the swing motor 14 during the stop signal is input. Has become. By the way, in the present embodiment, when the timer circuit 21 receives the human detection signal Sc while outputting the operation signal, it invalidates the human detection signal Sc and outputs the stop signal when the human detection signal Sc is output.
The reason for enabling this only when receiving is as follows. That is, since the human sensor 17 outputs the detection signal due to the change in the surface temperature as described above, for example, when there is a fluorescent lamp that is lit, the fluorescent lamp is in a stationary state, but the neck of the head 6 is Due to the shaking motion, the fluorescent lamp is a human sensor
Since it will be the same state as moving relative to 17,
The surface temperature of the human sensor 17 changes and outputs a detection signal. For this reason, for example, when the head 6 constantly swings continuously and a detection signal is output from the human sensor 17, if the swinging motion is stopped, a person in front of the head 6 is not detected. This is because, for example, even when there is a fluorescent lamp, the head part 6 stops swinging and blows air toward the fluorescent lamp.

Next, the operation of the above configuration will be described. By operating a switch (not shown) provided on the base 1, the blower motor 9 and the swing motor 14 are energized. Then, the blades 10 are rotated to start blowing air, and the swinging mechanism 12 is activated to start the swinging movement of the head 6 in the left-right direction. As shown in FIG. 2, the head swing motion of the head swing motor 14 is basically a pattern in which the power is cut off for t ₁ seconds and then cut for t ₂ seconds. Intermittently oscillates to the left or right by a predetermined angle, and when it oscillates to the leftmost or rightmost, it reverses the oscillating direction and again intermittently oscillates.

Now, in such intermittent swing, it is assumed that a person is in front of the head 6 when the head 6 stops the swing motion.
Then, the movement of the person causes the human sensor 17 to detect the detection signal Sa.
And the detection signal Sa is amplified by the amplification circuit 19 and output from the comparison circuit 20 as the person detection signal Sc. Then, the timer circuit 21 outputs the stop signal again for t ₃ seconds from the time when the human detection signal Sc is received. Therefore, as shown in FIG. 3, in the head 6, the comparison circuit 20 detects the human detection signal Sc.
The head is stopped for a further t ₃ seconds from the time when is output, and the air is intensively blown toward the person. Then, the comparison circuit 20 outputs the human detection signal.
When t ₃ seconds elapse from the time when Sc is output, the timer circuit 21
Outputs a driving signal, the head swing motor 14 is energized, and the head 6 starts to swing again. After that, intermittent swinging similar to that described above is performed, and when swinging is stopped. When the human sensor 17 outputs the detection signal Sa and the comparison circuit 20 outputs the human detection signal Sc, the operation of stopping the swing for t ₃ seconds is repeated from that point. Therefore, it is possible to automatically repeat the operation of blowing air intensively to the person and then performing the swing again without performing the operation for starting and stopping the swing one by one, which improves usability. To do.

In the above embodiment, the timer circuit is used when the swing motion is stopped.
The configuration is such that the oscillating stop time is extended only when the human detection signal Sc is input to 21, but this can detect the presence of a person without error even when the head 6 is performing the oscillating motion. If a human sensor is used, the head always performs a swing motion, and when the human sensor detects the presence of a person, the swing of the head is stopped for a predetermined time and the air is intensively blown to the person. good. Further, although the swing motor 14 is provided in the above embodiment, the blow motor 9 may be used as the drive source of the swing mechanism 12. In this case, the blow motor 9 and the swing motor 9 may be used. mechanism
An electromagnetic clutch may be provided between the electromagnetic clutch 12 and 12, and the electromagnetic vibration of the electromagnetic clutch may be controlled to control the swing of the head.

[Effects of the Invention] As described above, according to the present invention, even if the operation for swinging the head and stopping the swing is not performed one by one, air is intensively blown to a person while the swing is stopped, and thereafter It is possible to automatically repeat the operation of restarting the swing again, which is a practically excellent effect of improving usability.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a block diagram showing a swing control configuration, FIG. 2 is a time chart for showing a power interruption pattern of a normal swing motor, and FIG. Three
FIG. 4 is a time chart showing the relationship between the time when the presence of a person is detected and the power interruption time of the swing motor, and FIG. 4 is a vertical side view of the fan. In the figure, 1 is a base, 2 is a post, 4 is a neck piece, 6 is a head, 8 is a motor case, 9 is a blower motor, 10 is a blade,
Reference numeral 12 is a swing mechanism, 14 is a swing motor, 17 is a human sensor, 18 is control means, 19 is an amplification circuit, 20 is a comparison circuit, 21 is a timer circuit, and 22 is a control circuit.

Claims (1)

[Claims] 1. A head provided with a blower motor and blades rotated by the motor for swinging motion, and a human sensor provided on the head and a detection signal of the human sensor. An electric fan comprising a control means for restarting the swing motion of the head after the presence of a person is detected based on the detection of the presence of the person, and the swing motion of the head is stopped for a certain time from the detection time.