JPS60152844A - Controller of ventilating fan - Google Patents

Abstract

PURPOSE:To prevent an electrical sound of a ventilating fan and defective starting at the time of a contrary wind by starting the ventilating fan in a short period of time irrespective of a mounting position of a resistor for speed control, by providing a solenoid relay connecting in parallel with the speed control resistor and short-circuiting the resistor through driving and a timer circuit driving the solenoid relay only for a predetermined period of time after making of a power source switch. CONSTITUTION:When a timer switch 102 is turned ON, a timer circuit A begins action. A relay switch 6 short-circuits a speed control resistor 106 by a charging period of time (for example 10sec) based on a resistor 7 and a condenser 8. With this construction, a ventilating fan 104 is operated through the maximum output and starting is completed in a short period of time. When the charging based on the resistor 7 and the condenser 8 arrives at a certain level, a solenoid relay 3 is electrified, the relay switch 6 is disconnected and a short circuit of the speed control resistor 106 is released. With this construction, the ventilating fan 104 is operated through the predetermined value of the speed control resistor 106.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a ventilation fan control device used to control the air volume of a ventilation fan.

Configuration of conventional example and its problems Hereinafter, the conventional ventilation fan control device as described above will be explained with reference to the drawings.

FIG. 1 shows an electrical circuit diagram of a conventional ventilation fan control device. In FIG. 1, 101 is a power source, one end of which is connected to a terminal of a power switch 102, and the other end of which is connected to a ground line 103. The terminal of the power switch 102 is the ventilation fan 1
The entire motor 04 is connected to the T2 terminal of a bidirectional control rectifying element (hereinafter referred to as TRIAC) 106, and the T1 terminal of the TRIAC 106 is connected to the grounding wire 103 to form an AC circuit. 106 is a speed adjustment resistor, one of which is connected to the T2 terminal of the triac 106, the other of which is connected to one side of the capacitor 108 through the current limiting resistor 107, and the other of the capacitor 108 is connected to the grounding wire 103. ing. The above current limiting resistor 107
The connecting portion of the capacitor 108 and the capacitor 108 are connected to the G terminal of the triac 105 through the entire diac 109 to form a phase control circuit.

The operation of the ventilation fan control device configured as described above will be described below.

First, by turning on the power switch 102, current flows through the motor of the ventilation fan 104 and into the phase control circuit.
The discharge of the capacitor 108 triggers the TRIAC 106 through the AC 109, causing current to flow through the AC circuit and operating the ventilation fan 104. Speed adjustment resistor 106
can adjust the trigger timing of the triac, adjust the power to the ventilation fan 104, and control the speed of the ventilation fan 104.

However, in the above configuration, the speed adjustment resistor 1
06 is set to the low speed side, and the power switch 102
When the person becomes a person, sufficient power is not supplied to the ventilation fan 104, so it takes a long time to start the ventilation fan 106.
It had the disadvantages of making electrical noise when starting up and being unable to rotate when there was a headwind.

Purpose of the Invention In view of the two drawbacks, the present invention provides a system that supplies maximum power to the ventilation fan for a certain period of time from the time the power switch is turned on, and starts the ventilation fan in a short time, regardless of the installation position of the speed adjustment resistor. To obtain a ventilation fan control device that guarantees the startup of a ventilation fan to eliminate electric noise of the ventilation fan and startup failure during headwind.

Structure of the Invention To achieve this object, the ventilation fan control device of the present invention includes a bidirectional control rectifier element connected in series to the motor of the ventilation fan, a speed adjustment resistor of a phase angle control circuit connected to the gate terminal of this element, and a an electromagnetic relay that is connected in parallel with the resistor and short-circuits the resistor when driven;
It is equipped with a timer circuit that drives the electromagnetic relay only for a predetermined period of time after the power switch is turned on, and the ventilation fan is operated at maximum output at startup regardless of the value of the speed adjustment resistor, and after the specified period of time has elapsed. , the timer circuit holds both ends of the speed adjustment resistor open and the ventilation fan is operated according to the set value of the speed adjustment resistor, reducing the startup time of the ventilation fan and reducing startup noise and startup when there is a headwind. It will eliminate incapacity.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows an electrical circuit diagram of a ventilation fan control device in one embodiment of the present invention. In Fig. 2, 101 is a power supply, 102 is a power switch, 1o3 is a grounding wire, 104 is a ventilation fan, 105 is a triac, 1o6 is a speed adjustment resistor, 107 is a current limiting resistor, 108 is a capacitor, 109
is a diac, and the above structure is the same as that shown in FIG. 1 is a rectifier diode that is connected to the electromagnetic relay 3 through a voltage dividing resistor 2, and the A terminal is connected to the relay side.
2 are connected in parallel. A capacitor 5 is connected in parallel to the electromagnetic relay 3 and PUT 4 to form a DC circuit. A relay switch 6 is driven by the electromagnetic relay 3 and is connected to both ends of the speed adjusting resistor 106. 7 is a resistor at the connection point 9 (
(hereinafter referred to as the DC line) through the capacitor 8 and the grounding line 1
It is connected to 03. 10 is a field effect transistor (
A C terminal is connected to the connection point between the resistor 7 and the capacitor 8, a resistor 11 is connected to the S terminal of the FET 10 and the DC line 9, and the S
A resistor 12 is connected to the terminal and the ground wire 103.

13 is a transistor whose S terminal is connected to the S terminal of the FET 10 mentioned above. A base resistor 14 is connected to the DC line 9 and the terminal of the transistor 130B. 16
is an emitter resistance between the DC line 9 and the transistor 13.
The collector resistor 16 is connected to the C terminal of the transistor 13 and the ground line 103, and the C terminal of the transistor 13 is connected to the PUT4.
The timer circuit A is connected to the C terminal of the circuit A.

The operation of the ventilation fan control device configured as above will be described below.

First, when the power switch 102 is turned on, the timer circuit A starts operating. Charging time with resistor and capacitor 8 (
For example, 10 seconds) Dakeri Race Inochiro is speed adjustment resistance 1
Short circuit 06. As a result, the ventilation M104 is operated at maximum output and completes startup in a short time. When the charging by the resistor 7 and capacitor 8 reaches a certain level, the FET 10 and the transistor 13 trigger the PUT 4, current flows through the electromagnetic relay 3, the relay switch 6 is turned off, and the short circuit of the speed adjusting resistor 106 is opened. As a result, the ventilation fan 104 is operated according to the set value of the speed adjustment resistor 106. From now on, timer circuit A continues to hold this value.

As described above, by providing the timer circuit A, the electromagnetic relay 3 operated by the timer circuit A, and the relay switch 6 driven by the timer circuit A, when the speed adjustment resistor 106 is set to the low speed side, the power switch 102 can be operated by the user. Even so, the maximum output is achieved for a certain period of time regardless of the speed adjustment resistance, and the startup of the ventilation fan 104 is completed within the known time, thereby eliminating the problems of electric noise during startup and inability to start when there is a headwind.

Effects of the Invention As described above, the present invention includes a bidirectional control rectifier element connected in series to the motor of a ventilation fan, a speed adjustment resistor of a phase angle control circuit connected to the gate terminal of this element, and a speed adjustment resistor connected in parallel with the speed adjustment resistor. , an electromagnetic relay that short-circuits the resistor when driven, and a timer circuit that is connected to this electromagnetic relay and drives the electromagnetic relay only for a predetermined time after the power switch is turned on, and the speed adjustment resistor is on the low speed side. Even if the power switch is turned off, the ventilation fan will operate at maximum output for a certain period of time regardless of the speed adjustment resistor setting, reducing the startup time of the ventilation fan, and preventing startup noise or headwinds. Can solve disability problems. After a certain period of time, the switching fan can be operated according to the set value of the speed adjustment resistor, which has great practical effects.

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram of a conventional ventilation fan control device, and FIG. 2 is an electric circuit diagram of a ventilation fan control device according to an embodiment of the present invention. 3... Electromagnetic relay, 1o 4... Ventilation fan motor, 105... Bidirectional control rectifier, 1o
6... Speed adjustment resistor, A... Timer circuit.

Claims (1)

[Claims] A bidirectional control rectifier element connected in series to the ventilation fan motor,
A speed adjustment resistor of the phase angle control circuit connected to the gate terminal of this element, an electromagnetic relay connected in parallel with this speed adjustment resistor and short-circuiting the resistor by driving, and an electromagnetic relay connected to this electromagnetic relay that turns on the power switch. and a timer circuit that drives the electromagnetic relay only for a predetermined time after the ventilation fan control device.