JPH0625596U - Fan - Google Patents

Abstract

(57) [Abstract] [Purpose] One sensor unit can reliably detect human bodies and distances that exist within the detection range, and automatically set the air volume, swing angle, and swing direction appropriately. [Structure] Infrared sensor 17 with high detection ability and directivity
And the ultrasonic sensor 18 is used to ensure human body detection and distance detection to the human body. The sensor unit 16 including these sensors 17 and 18 is rotated corresponding to the swingable range of the blower to detect a wide detection range while ensuring high detection capability. Based on the reliable detection of the human body and the detection of the distance by the sensors 17 and 18, the control means appropriately and automatically sets the air volume, the swinging angle, the swinging direction, and the like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fan that detects the presence of a human body and automatically sets the amount of airflow, the swinging angle, the swinging direction, and the like.

[0002]

[Prior art]

 Conventionally, in a fan, a fan and a fan having a fan motor for driving the fan are attached to the upper part of the fan body so that the fan can be swung, and a swivel mechanism drives the fan to a desired angle and direction. There is a fan that I tried to do.

Then, as described in, for example, Japanese Utility Model Laid-Open No. 26795/1990, in front of the fan, the infrared sensor detects the direction in which the human body exists, and the ultrasonic sensor detects the distance to the human body. The fan motor, head swing angle, head swing direction, etc. are controlled based on the information detected by these sensors.For example, the air blower can be swung with the human body as the center, or the amount of air blow can be adjusted depending on the distance. There is a proposal for a variable fan.

However, the swingable range of the blower is a range that needs to be detected by the sensor, but this detection range is wide, and if one sensor detects this wide detection range, the detection capability is low and reliable. Not.

Therefore, as described in Japanese Patent Application Laid-Open No. 2-78795, a large number of infrared sensors are arrayed vertically and horizontally on the front surface of the fan body to perform detection in a narrow detection range limited by each infrared sensor. As a result, a fan has been proposed that is capable of accurately detecting a wide detection range as a whole.

However, since a large number of infrared sensors are used, there is a problem of high cost.

Further, as described in Japanese Patent Laid-Open No. 63-71598, a fan has been proposed in which a sensor is provided on the air blower and human body detection is performed in conjunction with swinging of the air blower. There is.

However, detection can be performed only within the range in which the blower swings, and detection cannot be performed outside the current swing range even in the swingable range of the blower.

[0009]

[Problems to be solved by the device]

 As described above, in the conventional fan, one sensor cannot reliably detect the human body and the distance in a wide detection range, and the air volume, the swinging angle, the swinging direction, and the like cannot be accurately set automatically.

The present invention has been made in view of such a point, and can reliably detect a human body and a distance existing within a detection range with one sensor unit, and can measure the air volume, the swinging angle, the swinging direction, and the like. It is an object of the present invention to provide a fan capable of accurately and automatically setting a fan.

[0011]

[Means for Solving the Problems]

 The present invention has a fan body, a fan, and a fan motor for driving the fan. The fan body is provided so as to be swingable with respect to the fan body. Of the fan motor, the sensor unit provided on the front surface of the fan body for detecting the human body and the distance, and the sensor unit for determining the human body detection direction and distance, The sensor unit is provided with an infrared sensor having a directivity for detecting a human body and an ultrasonic sensor having a directivity for detecting a distance. A sensor drive means is provided for rotating the sensor according to the swingable range of the blower.

[0012]

In the present invention, the human body detection and the distance detection to the human body are ensured by using the directional infrared sensor and the ultrasonic sensor having high detection ability. By rotating the sensor unit equipped with these sensors in response to the swingable range of the blower, a wide detection range can be detected while ensuring high detection capability. Then, based on the reliable human body detection and distance detection by each sensor, the air volume, the swinging angle, and the swinging direction can be set accurately and automatically.

[0013]

【Example】

 A configuration of an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 4, reference numeral 1 denotes an electric fan main body, and the electric fan main body 1 includes a base 2 and a cylindrical column 3 standing upright. A neck piece support member 4 is provided on an upper end of the column 3. A neck piece 5 is attached so that the elevation angle can be adjusted.

Reference numeral 6 denotes a blower body. The blower body 6 has a drive unit 7 attached to a neck piece 5 so as to swing, and a fan 8 and a guard covering the fan 8 are provided on the front surface of the drive unit 7. 9 is attached.

Then, the swinging means 10 drives the blower 6 to swing, and the swinging direction (including the swinging angle and the azimuth of the swinging center) can be variably set. It comprises a swinging drive means 51 and a swinging direction setting means 71 which will be described later.

The base 2 is provided with an operation panel 11, and the operation panel 11 is provided with a plurality of switches 12 for designating an operating state and a plurality of display lamps 13 for displaying an operating state. ing. As the switch 12, a blower on / off switch, an air volume changeover switch, a swinging changeover switch that switches between swinging and stopping of the blower body 6, a swinging direction designating switch that designates the swinging direction of the blower body 6, and a human body detection based There are automatic operation switches, timer switches, etc. that set automatic operation such as swinging.

A window hole 14 is formed in the front surface of the lower end of the support column 3, and a cover 15 that allows infrared rays and ultrasonic waves to pass through is fitted into the window hole 14. Inside the cover 15, human body detection and Also, a sensor unit 16 for detecting the distance is provided.

As shown in FIGS. 1 and 2, the sensor unit 16 includes a current-collecting infrared sensor 17 having a directivity for detecting a human body, and an ultra-directional sensor for detecting a distance to a human body. The sound wave sensor 18 is provided.

The infrared sensor 17 detects that the amount of infrared rays emitted from the human body changes due to the movement of the human body, and as shown in FIG. A condenser lens 20 is attached to the section. With this collecting lens 20, as shown in FIG. 9, 18 detection ranges are set so that even a slight movement of the human body can be detected and the detection distance can be lengthened.

The ultrasonic sensor 18 emits an ultrasonic wave, receives a reflected wave that hits the human body, and detects the distance from the time from the transmission to the reception. As shown in FIG. A slit case 22 for ultrasonic wave transmission and ultrasonic wave reception is provided on the front surface of a cylindrical case 21 having a built-in ultrasonic wave transmitter and ultrasonic wave receiver. As shown in FIG. 11, the detection range has directivity characteristics with a directivity angle of about 20 °.

The respective sensors 17, 18 are reciprocally rotated to the left and right in correspondence with the swingable range of the blower body 6 by the sensor unit driving means 25 shown in FIGS. 1 and 2. The sensor unit driving means 25 has a rotary table 26 that supports the sensors 17 and 18, and a scanning motor 27 that is a condenser motor that drives the rotary table 26 in forward and reverse directions.

In the rotary table 26, a mounting plate portion 29 is erected from a disk portion 28, and sensors 17 and 18 are mounted on the front surface of the mounting plate portion 29. A boss 30 to which the drive shaft 27a of the scanning motor 27 is connected is provided in a protruding manner at the lower center of the disc portion 28, and a slit 31 is provided at the rear edge portion.

Further, photo-interrupters 32 a and 32 b for rotation limit detection are arranged corresponding to respective positions of the slit 31 when the rotary table 26 is rotated 60 ° to the right and 60 ° to the left. Therefore, the rotary table 26 is driven to rotate in the normal and reverse directions within a range of 120 ° where the photo interrupters 32a and 32b detect the slit 31. The photointerrupters 32 a and 32 b have a light emitter and a light receiver arranged above and below the edge of the disk portion 28, and the detection light from the light emitter is shielded when the edge of the disk portion 28 faces, and the slit 31 When it comes to, the light is received by the light receiver.

FIG. 3 shows a rotation operation and a detection range of the sensor section 16 by the sensor section drive means 25. The sensor section drive means 25 reciprocally rotates the sensor section 16 left and right within a range of 120 °. The rotation is performed intermittently by temporarily stopping at the center lines S1 to S7 at 20 ° intervals, and the sensor section 16 is approximately 20 at the stop positions at the center lines S1 to S7. Detects the presence of human bodies and distances within the detection range of °.

As shown in FIG. 5, the drive unit 7 of the blower body 6 includes a fan motor 41 for rotationally driving the fan 8 attached to the rotary shaft 41 a. 42 is rotatably attached to the neck piece 5 via a rotation receiving member 43 so that the stud 42 can be swung.

It should be noted that the rotation receiving member 43 is rotatable with respect to the stud 42 and the neck piece 5, respectively, and is provided with projecting fulcrum portions 44 and 45 on its side portions and has a swinging azimuth direction on the front side. A pointer 46 for indicating the center is provided.

Next, the drive unit 7 is provided with a swing drive means 51 for driving the blower 6 to swing. The swing drive means 51 includes a swing motor 52 composed of a condenser motor. The swing motor 52 is fixed to the fan motor 41 with a bracket 53, and the crank 54 is fixed to the drive shaft 52a of the swing motor 52. , One end of the link 55 is rotatably connected to the tip of the crank 54 by a screw stopper 56, and the other end of the link 55 is rotatably connected to a fulcrum portion 44 of the rotation receiving member 43 by a screw stopper 57. There is.

Further, the swing drive means 51 is provided with a detection means 58 for detecting the left and right swing limit positions of the blower 6. The detection means 58 has a magnet 59 embedded in the upper surface of the front end of the crank 54, and corresponds to each position of the magnet 59 when the blower 6 moves to the left and right swing limit positions. Reed switches 60b and 60b are provided on the bottom surface of the bracket 53, respectively. The contact points of the reed switches 60a and 60b are switched from off to on when the magnet 59 faces them in close proximity.

Then, the swinging motion will be described with reference to FIG. The normal or reverse rotation of the swing motor 52 causes the crank 54 to rotate in the normal or reverse direction about the drive shaft 52a (showing the rotational trajectory a at the tip of the crank 54 in the figure), and this rotational force is transmitted to the link 55. To be done. At this time, the link 55 is rotatable about the fulcrum portion 44, and the drive shaft 52a is rotatable about the stud 42 (the rotation trajectory b of the drive shaft 52a is shown in the figure). A right rotation or left rotation moving force acts on the drive shaft 52a, and the blower body 6 rotates right or left about the stud 42.

Further, the blower body 6 which rotates in the clockwise direction or the counterclockwise direction reaches the swing limit position, the magnet 59 of the crank 54 closely faces the right side reed switch 60a or the left side reed switch 60b, and the right side reed switch 60a or When the contact of the left reed switch 60b is switched from off to on, the rotation of the swing motor 52 is reversed and the blower body 6 is reversed and rotated in the opposite direction.

Therefore, the blower 6 moves back and forth with the center line c of the blower 6 within the range of the swing angle θ, and the detection of the swing limit position of the blower 6 is used as a reference. By doing so, the swing direction and angle of the blower 6 can be arbitrarily set and controlled within the range of the swing angle θ.

The swing direction of the blower 6 is determined by the rotation position of the rotation receiving member 43 with respect to the neck piece 5, and the direction in which the pointer 46 of the rotation receiving member 43 faces is the swing center.

Next, referring to FIG. 5, the neck piece 5 is provided with a swing direction setting means 71 for varying the swing direction of the blower 6. The heading azimuth setting means 71 is provided with an azimuth setting motor 72 composed of a condenser motor capable of forward / reverse rotation control. The azimuth setting motor 72 is housed and fixed in the case 5a of the neck piece 5, and the azimuth setting motor 72 The crank 73 is fixed to the drive shaft 72a of the, and one end of the link 74 is fitted to the shaft portion 73a at the tip of the crank 73 and is rotatably connected by a stopper or the like, and the other end of the link 74 is a rotation receiving member. It is rotatably connected to a fulcrum portion 45 of 43 by a screw stopper 75.

Then, as shown in FIG. 7, when the azimuth setting motor 72 is driven in the normal direction (solid arrow) or the reverse direction (broken line arrow), the crank 73 makes a circular motion about the drive shaft 72 a, and the crank 74 moves through the link 74. The rotation receiving member 43 is rotated rightward or leftward when viewed from the front. By rotating the rotation receiving member 43, the swing direction of the blower body 6 can be changed to the right or left.

Further, in FIG. 5, the heading azimuth setting means 71 is provided with a detection means 76 for detecting a limit position at which the heading azimuth of the blower body 6 can be varied left and right. This detection means 76 attaches a magnet 77 to the upper end of the shaft portion 73a of the crank 73, and also attaches the magnet 77 to each position of the magnet 77 when the rightward or leftward rotation of the rotation receiving member 43 reaches the limit position. Correspondingly, the right side reed switch 78a and the left side reed switch 78b are attached to the lower surface of the lid 79 of the neck piece 5.

Then, as shown in FIG. 7, the azimuth setting motor 72 is controlled to rotate in the forward and reverse directions within a range of about half a rotation until the crank 73 rotates and the magnet 77 reaches the reed switches 78 a and 78 b. The receiving member 43 is rotated within the range of the angle α.

Next, FIG. 12 shows a control block diagram for controlling the electric fan, and 81 is a control means composed of a micro computer. The control means 81 includes a plurality of switches 12 of the operation panel 11 and a reed switch 60a. , 60b, the reed switches 78a and 78b, the photo interrupters 32a and 32b, the infrared sensor 17, and the ultrasonic sensor 18 are input through the input circuit 82.

Then, the control means 81 controls the fan motor 41 through the drive circuit 83, the swing motor 52 through the drive circuit 84, the azimuth setting motor 72 through the drive circuit 85, and the drive circuit 86. The scanning motor 27 is controlled, and the display lamp 13 is controlled through the display drive circuit 87.

The motors 27, 52, 72 each of which is a condenser motor are provided with two motor coils 92, 93 for the rotor 91, and the motor coils 92, 92 are provided at the common terminals of the drive circuits 84, 85, 86. Connect one end of 93 respectively, connect a capacitor 94 between the other ends of both motor coils 92, 93, and connect the forward rotation terminals of drive circuits 84, 85, 86 between this capacitor 94 and motor coil 92. In addition, the reverse terminals of the drive circuits 84, 85, 86 are connected between the capacitor 94 and the motor coil 93.

Then, the control means 81 has a function of controlling the fan motor 41, the swing motor 52, and the azimuth setting motor 72 by determining the human body detection direction and distance by the detection by the sensor unit 16.

Next, the control operation by the control means 81 will be described.

When the automatic operation based on human body detection is set by the automatic operation switch of the operation panel 11, the scanning motor 27 of the sensor unit driving means 25 is drive-controlled so that the sensor unit 16 facing the front surface of the fan is driven. The infrared sensor 17 detects whether or not a human body is present within the blowable range (detection range) in front of the fan by intermittently rotating. When the infrared sensor 17 detects the human body, the ultrasonic sensor 18 simultaneously detects the distance to the human body. Such detection operation is performed constantly or at regular intervals.

Then, the control means 81 determines the human body detection direction and determines the drive amount of the position setting motor 72 of the heading direction setting means 71 and the drive amount of the heading motor 52 of the heading drive means 51. In addition, the distance to the human body is determined, and the appropriate air flow rate for the distance is determined.

For example, when there is one person within the detection range and the human body detection direction is one direction, the swing center, that is, the pointer 46 of the rotation receiving member 43, is moved to the human body detection direction by the drive control of the azimuth setting motor 72. In response, the blower 6 is swung around the human body by the drive control of the swing motor 52, and the blower 6 is blown by the drive control of the fan motor 41 at an appropriate air volume to the distance to the human body.

Further, when there are a plurality of persons within the detection range and there are a plurality of human body detection directions, the swing center is directed toward the center of the plurality of human body detection directions, and air is blown in all human body detection directions. Drive to swing across.

When the human body is not detected within the detection range, the stopped state is maintained. Furthermore, if a person comes out of the detection range and is no longer detected in the autonomous driving state, the operation is stopped after a certain period of time.

A pulse motor or a synchronous motor may be used for each motor 27, 52, 72.

The position detection of the sensor section 16, the swing limit position detection of the swing drive means 51, the rotation limit position detection of the swing direction setting means 71, etc. are not limited to reed switches and photointerrupters. Alternatively, other detecting means may be used. Moreover, it may be configured to detect with one detection means instead of using two.

Further, the head swing drive means 51 and the head swing direction setting means 71 may be provided at other places such as the base part 2 of the fan body 1.

Further, if the swinging drive means 52 is capable of setting and controlling the swinging direction and angle of the blower body 6 without providing the swinging direction setting means 71, the swinging drive means 52 can be used to drive the blower body 6. Both the head swing and head swing direction can be set, and in this case also, the same effect as the above-mentioned embodiment can be obtained.

[0052]

[Effect of device]

 According to the present invention, the human body detection and the distance detection to the human body are ensured by using the directional infrared sensor and ultrasonic sensor having high detection ability, and the sensor unit equipped with these sensors is blown. By rotating the body according to the swingable range, it is possible to detect a wide detection range while maintaining high detection capability. Therefore, the air volume, the swinging angle, the swinging direction, and the like can be accurately and automatically set based on the reliable detection of the human body and the detection of the distance by the respective sensors.

[Brief description of drawings]

FIG. 1 is a side view of a sensor unit showing an embodiment of a fan of the present invention.

FIG. 2 is a plan view of a sensor unit according to the above embodiment.

FIG. 3 is an explanatory diagram showing a detection range of the sensor unit according to the embodiment.

FIG. 4 is a perspective view showing an external appearance of the electric fan of the embodiment.

FIG. 5 is a cross-sectional view of an air blower according to the above embodiment.

FIG. 6 is an explanatory view showing a swinging motion of the blower body of the embodiment.

FIG. 7 is an explanatory view showing a heading azimuth setting operation of the blower of the above embodiment.

FIG. 8 is a perspective view of an infrared sensor according to the above embodiment.

FIG. 9 is a characteristic diagram showing a detection range of the infrared sensor of the above-mentioned embodiment.

FIG. 10 is a perspective view of the ultrasonic sensor of the above embodiment.

FIG. 11 is a characteristic diagram showing a detection range of the ultrasonic sensor of the above embodiment.

FIG. 12 is a control block diagram of the embodiment.

[Explanation of symbols]

 1 Fan Main Body 6 Blower 8 Fan 10 Swinging Means 16 Sensor 17 Infrared Sensor 18 Ultrasonic Sensor 25 Sensor Driving Means 41 Fan Motor 81 Controlling Means

Claims (1)

[Scope of utility model registration request] 1. A fan body having a fan main body, a fan and a fan motor for driving the fan, the fan being provided so as to be swingable with respect to the fan main body, the fan being driven to swing, and a swinging direction. And a sensor unit provided on the front surface of the fan body for detecting a human body and a distance, and the sensor unit for determining the human body detection direction and distance to determine the fan motor and the head swing. And a control means for controlling the means, wherein the sensor section is provided with an infrared sensor having directivity for detecting a human body and an ultrasonic sensor having directivity for detecting distance, and this sensor section is provided for the blower body. An electric fan provided with a sensor unit driving means for rotating in correspondence with a swingable range.