JPH0447158B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a remote control device for controlling the wind speed of an electric fan.

[Conventional technology]

Figures 2 and 3 are for example Utility Model No. 59-73592.
2 is a diagram showing a conventional electric fan remote control device having the same gist as that shown in the publication, FIG. 2 is an installation side view of a ceiling fan, and FIG. 3 is an electric circuit diagram.

In Figure 2, 1 is the ceiling fan body installed on the ceiling;
2 is a switch that remotely controls the main body 1 installed on the wall.

In Figure 3, 2a is the common contact of switch 2, 2b
is "strong" contact, 2c is "medium" contact, 2d is "weak"
Contact point 2e is the "off" contact, 3 is the fan electric motor built into the main body 1, and the winding is wound so that "strong", "medium" and "weak" rotation can be obtained.
Each contact 2b to 2d, 2a and four connecting wires 4A to
It is connected by 4D (winding lead wire).

A plug 5 is connected to the connecting wire 4D and one end of the motor winding, and is inserted and connected to a commercial power source.

The conventional electric fan remote control device is configured as described above, and by switching the switch 2 to the contacts 2d to 2b, the windings of the electric motor 3 are sequentially switched, and the main body 1 is set to "weak", "medium" and "strong", respectively. "drive.

[Problem that the invention seeks to solve]

In the conventional electric fan remote control device as described above, the number of connecting wires 4 corresponds to the lead wires of the motor windings.
A to 4D are required, and since these are connected to a commercial power supply, accurate construction is required with safety in mind, and there is a problem that there is a risk of short circuit accidents if the wiring is incorrect. be.

This invention was made to solve the above problems, and provides a remote control device for a fan that can reduce the number of connected wires, use low voltage, and adjust the wind speed with simple and safe construction. With the goal.

[Means for solving problems]

The electric fan remote control device according to the present invention connects the electric fan main body and the switch with two connecting wires,
The switch is provided with a first resistor that is connected to the second connection line and whose connection to the first connection line is switched;
The main body includes a second resistor that is inserted between the DC power supply and the first connection line and generates a plurality of detection voltages in the first connection line determined by the connection with the first resistor, and a voltage comparator for comparing with a reference voltage;
A relay is provided that operates according to the output to switch the lead wire of the motor winding.

[Effect]

In this invention, by switching the connection between the first resistor connected to the second connection line and the first connection line, the detection voltage of the first connection line changes, and accordingly, each of the relays operates, the leader of the motor winding is switched to adjust the speed.

〔Example〕

1 and 2 are diagrams showing one embodiment of the present invention, and FIG. 1 is an electric circuit diagram, and 1, 2, 2a
2e, 3, 4A to 4D, and 5 are similar to the above-mentioned conventional device.

In the figure, 7A and 7B are the first and second connection wires that connect the switch 2 and the main body 1, and the second connection wire 7B
A first resistor R1 is connected between the "medium" contact 2c and the "weak" contact 2d, and a first resistor R2 is connected between the "weak" contact 2d. Furthermore, the "strong" contact 2b is open, and the "off" contact 2e is directly connected to the second connection line 7B. R3 is a second resistor connected between one end of the first connection line 7A and the DC positive power supply terminal (described later) V.
4, C1 is a resistor and capacitor that absorbs the surge voltage entering from the first connection line 7A, R5 to R8
resistors form a reference voltage generation circuit and are connected in series to the positive power supply terminal V to determine the reference voltage; 8 to 10 are the reference voltage and the voltage at one end of the first connection line 7A (detection voltage) Voltage comparators 11 to 13 are voltage comparators 8 to 1, respectively.
A relay that is energized when the output of 0 becomes "L", 1
1a to 13a are contacts of relays 11 to 13, respectively, and lead wires 4A to 4C are contacts 11a to 1, respectively.
It is connected to the plug 5 via 3a. 14 is a DC power supply circuit, 15 is a power transformer that steps down the commercial power supply to a low voltage, 16 is a rectifier that rectifies the stepped down power supply to DC, C2 is a capacitor that smoothes the rectified DC, and 17 is a constant voltage. A constant voltage integrated circuit that outputs , C3 is a capacitor for preventing oscillation, V
is the DC positive power supply terminal.

In addition, the switch 2, the first and second connection wires 7
Components other than A, 7B and the plug 5 are provided in the main body 1.

Next, the operation of this embodiment will be explained.

The DC power supply circuit 14 converts the commercial power supply into a DC low voltage, and generates a constant voltage V _d at the DC positive power supply terminal V.

First, setting of the reference voltages of the voltage comparators 8 to 10 will be explained.

This reference voltage is determined to have the following value.

Reference voltage V 8 of voltage comparator ₈ = 3/4 V _d Reference voltage V 9 of voltage comparator ₉ = 2/4 V _d Reference voltage V 10 of voltage comparator ₁₀ = 1/4 V _d Therefore, resistors R5 to R8 are all of the same resistance value.

Also, if the resistance R3 is R _a , then the resistances R1, R
2 is set to the following value.

R1=5/3R _a R2=3/5R _a However, the resistance R _a is connected to the first and second connection wires 7A,
The value should be sufficiently larger than the sum R _l of the resistance values of 7B (R _a ≫ R _l ).

When the resistance value is determined as described above, the reference voltage generated at one end of the first connection line 7A depending on the state of the switch 2 is as follows.

"Off"...Zero "Weak"...3/8V _d "Medium"...5/8V _d "Strong"...V _d Therefore, in the case of "Weak", the reference voltage of voltage comparator 9 V ₉ and the reference voltage V ₁₀ of the voltage comparator 10, and in the case of "medium", the voltage becomes an intermediate voltage between the reference voltage V ₈ of the voltage comparator 8 and the reference voltage V ₉ of the voltage comparator 9, and noise etc. can be made least susceptible.

Now, when the switch 2 is set to "off", the voltage of the first connection line 7A becomes zero, and the outputs of the voltage comparators 8 to 10 all become "H". Therefore, relays 11 to 13 are all deenergized,
Since the contact 13a is open, the electric motor 3 does not operate.

Next, when the switch 2 is set to "weak", the detected voltage of the first connection line 7A becomes 3/8V _d , and only the output of the voltage comparator 10 becomes "L". As a result, the relay 13 is energized, the contact 13a is switched, the lead wire 4c is energized through the contact 13a and the contact 12a, and the motor 3 is operated in a "weak" mode. Similarly, if switch 2 is set to "medium", voltage comparator 1
The outputs of 0 and 9 become "L", and relays 13 and 12
is energized, the output wire 4B is energized, and "medium" operation is performed. If switch 2 is “strong”, voltage comparator 1
The outputs of 0 to 8 become "L", and relays 13 to 11
are all energized and enter "strong" operation.

In the above embodiment, three voltage comparators 8 to 10 are used to perform switching in four stages: "off,""weak,""medium," and "strong." However, by increasing or decreasing the number of voltage comparators,
It is clear that the number of operating speeds can be varied.

〔Effect of the invention〕

As explained above, the present invention connects the electric fan body and a switch having a plurality of contacts using two connection wires, and the switch is connected to the second connection wire and has a connection to the first connection wire. A switchable first resistor is provided, and the main body is inserted between the DC power supply and the first connection line to generate a plurality of detection voltages determined by the connection with the first resistance in the first connection line. A second resistor, a voltage comparator that compares the detected voltage with a reference voltage, and a relay that operates according to the output to switch the lead wire of the motor winding are provided.

As a result, when using a switch that sequentially switches a plurality of contacts, the fan's wind speed can be adjusted easily and safely using two low-voltage connection wires.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram showing an embodiment of a remote control device for an electric fan according to the present invention, FIG. 2 is a side view of an installation of a ceiling fan common to the remote control device for electric fans of this invention and the conventional one, and FIG. FIG. 1 is an electrical circuit diagram showing a conventional electric fan remote control device. In the figure, 1 is the ceiling fan body, 2 is the switch, 2b~
2e is the "strong", "medium", "weak", and "off" contact, 3 is the fan electric motor, 4A to 4D are the lead wires, 7A is the first connection wire, 7B is the second connection wire, 8 to 10 are the voltage Comparators, 11 to 13 are relays, R1 and R2 are first resistors, R3 is a second resistor, R5 to R8 are reference voltage generation circuits (resistors), and V is a DC positive power supply terminal. Note that the same reference numerals in the figures indicate the same parts.

Claims (1)

[Claims] 1. By connecting the electric fan body and the switch with a connecting wire, sequentially switching the plurality of contacts provided on the switch, and sequentially connecting the plurality of lead wires drawn out from the electric fan motor winding to the commercial power source, the above can be achieved. In the device for controlling the speed of an electric motor, the main body and the switch are connected by a first connection line and a second connection line, and the switch has the second connection line.
a first resistor connected between the connecting line and the contact point, the connection with the first connecting line being switched;
The main body includes a reference voltage generation circuit that generates a plurality of reference voltages, and a reference voltage generation circuit that is inserted between the DC power supply and the first connection line and generates a plurality of detection voltages determined by the connection with the first resistor. a second resistor generated in the first connection line; a plurality of voltage comparators for comparing the detected voltage and the reference voltage; A remote control device for an electric fan, comprising a plurality of relays connected to the commercial power source.