JPS63215896A - Electric fan - Google Patents

Abstract

PURPOSE:To improve the extent of usability, by installing a directional discriminate receiving part consisting of more than two pieces of light receiving elements, whose optical axes are crossed at an equiangle on the same flat surface, in an electric fan body, and controlling it so as to make a sense of a blast part automatically directable to the direction of an optical signal out of a remote-controlled transmitter. CONSTITUTION:In this electric fan, there is provided with a directional discriminate receiving part 6 made up of setting up plural pieces (four in illustration) of light receiving elements 7a-7d having the same directional characteristic and light receiving sensitivity as making their optical axes differ by 90 degrees at a time. And, the optical signal transmitted out of a light emitting element 4 of a remote-controlled transmitter body 1 is received by a receiver 6, and the photoelectric current generated at any of these light receiving elements 7a-7d is processed at a signal processing and control circuit 11, whereby slippage out of a reference axis is determined. A oscillating motor is rotated in a direction for solving this slippage and thereby an electric fan is controlled so as to make a blast part face toward a remote control operator.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric fan, and more particularly to an electric fan having a function of determining the direction of air flow using an optical wireless remote control device.

[Conventional technology]

Conventionally, the functions of optical wireless remote control devices attached to electric fans are as follows: turning on the power switch, 01.'
F1 [Amount adjustment, timer setting, starting and stopping of swinging motion.

[Problem that Air 1μ) attempts to solve] The conventional Pr and 'r fans mentioned above do not have the ability to determine the air blowing direction by remote control, so if a person wants to change the air blowing direction, a person must move close to the N4 air fan. It was often necessary to manually change the direction of the fan, or to turn the blow switch on the remote control device to 0N17C, and turn on the swing stop switch when the blowing surface of the fan faced the operator.

[Means for solving problems]

The electric fan according to the present invention includes an optical wireless remote control transmitting device that transmits an optical signal as a control signal;
A receiving section for direction determination consisting of light receiving elements with the same tM and number of directivity characteristics and light receiving sensitivity characteristics, a receiving section for command signals having a wide directional characteristic, a logarithmic amplification circuit and a subtraction circuit, and can be rotated in any direction. It has a blower section equipped with an angle detection section.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

Figure 1 shows the optical wireless remote control device (
FIG. 2 is a block diagram of an electric fan with a function of determining the direction of air blowing using a remote control. 1 is a remote control transmitter main body, 2 is a command input section, 3 is a signal generation circuit, 4 is a light emitting element, 5 is an electric fan main body, 6 is a receiving section for direction determination, 7a, 7b, 7C, 7
d is a light receiving element; 8 is a command signal receiving section; 9 is a light receiving element;
10 is an amplifier circuit, 11 is a signal processing and control circuit section, 1
2a and 12b are logarithmic amplifier circuits, 13 is a subtraction circuit, 14 is a fan rotation drive unit, 15 is a motor for sending Jt7, 16
17 is a swing motor drive circuit, 17 is a swing motor, 18 is an angle detection section, and 19 is a blower and neck photographing block.

Figure 2 is a diagram showing an example of the installation of the light-receiving element of the receiver for non-direction determination in Figure 1, where 20.21, 22.23 are reference axes, and 24.25.26.27 is the light of the light-receiving element. It is the axis. 2
8.29.30.31.32 is the direction of the optical signal.

Next, the operation will be explained. However, the detailed operations of the electric fan and the optical wireless remote control device (hereinafter referred to as remote control) are already known and will therefore be omitted.

When a command to change the air blowing direction is input from the command input section 2 of the remote control transmitter 1, an optical signal is output from the light emitting element 4 via the signal generating circuit 3. The optical signal is received by the direction determination receiving section 6 and sent to the light receiving element 7a.

A photocurrent is generated in any of 7b, 7C, and 7d. The magnitude of this photocurrent varies depending on the angle of incidence depending on the directional characteristics of the light receiving element, so the signal processing and control circuit 111 (
By processing this, the deviation from the reference axis is determined, and the hanging motor 17 is rotated to direct the sending unit toward the remote control operator.

Here, a method for determining the direction will be explained with reference to FIGS. 1 and 2.

When the optical signal comes from the direction of 28, the light receiving elements 7a and 7d
gives the same output. Then, the direction of the reference axis 20 is determined. In the case of direction 29, the light receiving element 7a,
An output is obtained from the light receiving element 7d, but the output from the light receiving element 7a is larger. By subtracting these two outputs via the logarithmic amplifier circuits 12a and 12b, a value corresponding to the deviation angle from the reference axis 20 is obtained. The angle between the blowing section and the reference axis is detected by the angle detection section 18 and sent to the signal processing and control circuit 11, thereby determining the rotation direction and the rotation angle.

In the case of direction 30, the output of the light receiving element 7a is large, and the output of the light receiving elements 7b and 7d is almost non-existent or can be ignored. At this time, the direction of the optical signal, that is, the direction of the remote control operator, is determined to be the optical axis direction of the light receiving element 78.

In the case of the direction 31, since output is obtained at the light receiving elements 7a, 7b, the base 114@
21 is determined.

Here, logarithmic amplifier circuits 12a, 12b and subtraction circuit 1
3 has the purpose of canceling out factors such as distance parameters and ambient temperature that affect the magnitude of the light output.

Furthermore, here, the receiving section for direction determination is the light receiving element 4 (v
Although an example has been described in which the number of light receiving elements is 2, control is possible within a limited range even with a minimum of two light receiving elements.

[Example 2] FIG. 3 shows Example 2 of the present invention. Although the configuration is the same as in the first embodiment, there is an advantage that command signals can be received from all angles by installing a plurality of command signal receiving sections.

Further, in the first embodiment, the optical output is passed through a logarithmic amplification and subtraction circuit, whereas in the seventh embodiment, the optical output is passed through an amplifier circuit and a division circuit.

〔Effect of the invention〕

As described above, the present invention has the effect that since the electric fan has an air blowing direction determining function, the air blowing direction can be changed in the direction of the operator of the remote control device without a person having to move close to the electric fan.

In addition, the operator simply presses the wind direction change key for a short time to direct the remote control device toward the electric fan, and there is no need to continue sending remote control signals until the electric fan directs the air blower toward the operator.

[Brief explanation of the drawing]

1 and 3 are examples of the present invention, and FIG. 2 is an example of the present invention. 1 is an example of the installation of a light receiving element of a receiving section for direction determination in FIG. 1...Optical wireless remote control signal transmitter body, 2...Command input section, 3...
...Signal generation circuit, 4...Light emitting element, 5...
...Fan body, 6... Direction determination receiving section, 7a, 7b, 7C, 7d... Light receiving element, 8.
...Command signal receiving section, 9... Light receiving element,
10...Amplification circuit, 11...Signal processing and control circuit, 12a, 12b...Logarithmic amplifier circuit, 1:(...Subtraction circuit, 14.・・・・・・
Fan rotation drive circuit, 15... Blower fan motor, 16... Swing motor drive circuit, 17.
... Swing motor, 18 ... Corner detection section, 19 ... Air blower and neck photographing block, 20° 21, 22.23 ... Reference axis, 24, 25, 2
6.27... Optical axis, 28, 29, 30, 31.
32... Optical signal direction, 33a, 33b...
...Amplification circuit, 34...Divide circuit.

Claims (1)

[Claims] In a fan with an optical wireless remote control device, in order to receive an optical signal from a transmitter, two or more light-receiving elements having the same directivity and light-receiving sensitivity and whose optical axes intersect at the same angle on the same plane are used. It has a receiving part for direction determination, a receiving part for command signals with wide directional characteristics, and a swinging part that can be rotated in any direction and has an angle detection part that detects the rotation angle from the reference axis. An electric fan characterized by having a function of independently determining its direction.