JPH07249472A - Heat emission control device for heat emitting body having electric resistance - Google Patents

Abstract

PURPOSE:To control the heat emission amount from a heat emitting body at low cost by connecting a control switch and a rectifier diode parallel with each other, and connecting the obtained circuit between AC mains and the heat emitting body. CONSTITUTION:A control switch 5 and a rectifier diode 6 are connected parallel with each other, and the circuit is connected between AC mains and a heat emitting body 1 to form an electric circuit. Because of this constitution of the electric circuit, all waves of the AC mains are supplied to the heat emitting body 1 when the power is turned on in the condition that the control switch 5 is on, and the rated heat emitting operation takes place. When the control switch 5 is turned off, half waves of the AC mains controlled by the diode 6 are supplied to the heat emitting body 1 to generated a heat emitting condition reduced to half.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for controlling the amount of heat generated by a heating element in an appliance which is used by connecting an AC power source to the heating element having electrical resistance.

[0002]

2. Description of the Related Art Conventionally, there have been the following heat generation amount control devices for heating elements. 1. A method in which an intermediate terminal is provided between both poles of the heating element and a mechanical switch is used to connect and disconnect the intermediate terminal and the AC power supply. 2. A method of controlling the phase of the AC power supply supplied to the heating element using an electronic switch "thyristor". 3. Electronic switch "thyristor" using temperature sensor
Phase control or ON / OFF control at the zero-cross point of the AC power supply to automatically maintain the set temperature.

[0003]

The method of controlling the heating element by providing the intermediate terminal with the heating element has a simple structure and can be manufactured at low cost, but has the following drawbacks. Heat-resistant pipe "bobbin" with a resistance wire wound around it, or a soldering iron using a ceramic heater, or an electric stove with a coiled resistance wire inserted in a quartz tube. It is necessary to protect the part that comes into contact with the heating element with something that has electrical insulation and heat resistance when you take out the lead wire from, and it is difficult to make it because the thin resistance wire has an intermediate terminal. . The method of controlling using the electronic switch "thyristor" can set the temperature freely, so it has a great effect depending on the equipment used, but in the soldering iron and personal small electric stove, etc. , I couldn't combine it because it made the product expensive.

[0004]

A control switch (5) and a rectifying diode (6) are connected in parallel, and this is connected between an AC power source (AC) and a heating element (1) to form an electric circuit. ing.

[0005]

When the control switch (5) is turned on and the AC power supply (AC) is turned on, the full wave of the AC power supply (AC) is supplied to the heating element (1) to generate the rated heat. When the control switch (5) is turned off, the rectifier diode (6)
The half-wave of the alternating-current power supply (AC) controlled by the above is supplied to the heating element (1), and the heat generation is halved.

[0006]

【Example】

FIG. 1 is an electric circuit diagram showing a conventional one. AC power supply (AC) at both ends (a), (b) of the heating element (1) "metal heating element, non-metal heating element" having electrical resistance
Is connected to generate heat. FIG. 2 is an electric circuit diagram showing a conventional one. The heat generation amount can be changed in two steps to that shown in FIG. An intermediate terminal (m) is provided between both terminals (a) and (b) of the heating element (1), and an AC power source (AC), a terminal (a) and an intermediate terminal (m) are provided depending on the changeover switch (2). Configured to switch connections. When the AC power supply (AC) and the terminal (a) are connected, the rated heat is generated, and when the AC power supply (AC) and the intermediate terminal (m) are connected, the resistance value of the heating element (1) decreases. Therefore, the amount of current increases and the amount of heat generation also increases.
FIG. 3 is an electric circuit diagram showing a conventional one. An electronic switch "Triac" (3) is connected between an AC power source (AC) and a heating element (1). This is a method of controlling the electronic switch (3) with the control circuit (4) of the AC power supply supplied to the heating element (1), and there are a manual method and an automatic method. The automatic method uses a temperature sensor to perform phase control with an electronic switch "Triac" (3) or ON / OFF control at the zero cross point of the AC power supply to automatically maintain the set temperature. is there.

First Embodiment of the Present Invention FIG. 4 is an electric circuit diagram showing an embodiment of the present invention. The control switch (5) and the rectifier diode (6) are connected in parallel, and this is connected between the AC power supply (AC) and the heating element (1) to form an electric circuit. As described above, the present invention has the circuit configuration. Therefore, when the control switch (5) is in the ON state and the AC power supply (AC) is turned on, the heating element (1) receives the full wave of the AC power supply (AC). Is supplied to generate the rated heat. When the control switch (5) is turned off, the half wave of the AC power supply (AC) controlled by the rectifier diode (6) is supplied to the heating element (1), and the heat generation is reduced to half.

Second Embodiment of the Present Invention FIG. 5 is a plan view of a soldering iron showing an application example of the present invention. The electric circuit is exactly the same as that shown in FIG. 4, and it has a built-in heating element (1) and a rectifying diode (6) and is composed of a control switch (5), a grip (7), a tip (8) and a cord (9) Has been done. In FIG. 5, the control switch (5) and the rectifying diode (6) are mounted inside the grip (7),
You may attach it in the middle of the code.

FIG. 6 is a front view of a conventional electric stove. The main body (10) has a heat reflection plate (11) attached to the front surface and is fixed on the base (12). Heating element (1A)
The heating element (1B) is attached to the main body (10) with a space from the heat reflection plate (11). FIG. 7 is an electric circuit diagram conventionally used in the electric stove shown in FIG. Power switch (13) for the heating element (1A)
However, a power switch (14) is connected to each of the heating elements (1B). FIG. 8 is a cross-sectional view of the electric stove shown in FIG. 6 taken along the line LL. In this case, when both the power switch (13) and the power switch (14) shown in FIG. 7 are in the ON state, the heat generating element (1A) and the heat generating element (1B) are in the heat generating state. ) Becomes wider. Figure 9
Is a circuit in which the power switch (13) is on and the power switch (14) is off in the electric circuit diagram of the electric stove shown in FIG. 7. 10 is a cross-sectional view of the electric stove shown in FIG. 6 taken along the line L-L. In this case, since the power switch (13) shown in FIG. 9 is in the on state and the power switch (14) is in the off state, only the heating element (1A) is in the heating state, so the heat reflection range (15) is narrow. Become.

Embodiment 3 of the Present Invention FIG. 11 is an electric circuit diagram in which the present invention is applied to the conventional electric stove shown in FIG. The control switch (5) and the rectifier diode (6) are connected in parallel, and one connection terminal is connected to the AC power supply (AC) via the power switch (16),
The other connection terminal is connected to the terminal (a) of the heating element (1A) and the terminal (c) of the heating element (1B), respectively. The terminal (b) of the heating element (1A) and the terminal (d) of the heating element (1B) are both connected to an AC power source (AC). Since the electric circuit is configured as described above, when the power switch (16) is turned on and the control switch (5) is turned off as shown, the heating element (1A) and the heating element (1B) are turned on. Is supplied with only a half wave of the AC power source (AC) through the rectifying diode (6), and the amount of heat generated is in half. When the power switch (16) and the control switch (5) are both turned on, the heating element (1A) and the heating element (1A)
B) is supplied with the full wave of the AC power supply (AC), and the amount of heat generated is in the rated state. 12 is a cross-sectional view of the electric stove shown in FIG. 6 taken along the line LL. In this case, FIG.
When the power switch (16) indicated by is turned on and the control switch (5) is turned off, the heating element (1A) and the heating element (1B) are supplied with a half wave of the AC power source (AC), so that heat is generated. Although the amount is halved, both the heat generating element (1A) and the heat generating element (1B) are in a heat generating state, so the heat reflection range (1
5) maintains a wide state. As an application example, the soldering iron and the electric stove have been described, but the present invention can be applied to all of the resistance heating methods using a resistor.
It can also be used for controlling the amount of heat generated by connecting to an infrared bulb designed for infrared heating, and for controlling illuminance by connecting it to a lighting bulb.

[00012]

Since the waveform of the AC power supply supplied to the heating element "resistor" can be switched between full wave and half wave, the following effects can be obtained. 1. The amount of heat generated by the heating element can be changed in two steps. 2. When used in a soldering iron, one unit can be used for two units with different wattages. 3. When used in an electric stove, the heat reflection range can be widened when compared with the conventional electric stove when the amount of heat generated is halved.

[Brief description of drawings]

FIG. 1 is a conventional electric circuit diagram.

FIG. 2 is a conventional electric circuit diagram.

FIG. 3 is a conventional electric circuit diagram.

FIG. 4 is an electric circuit diagram of the present invention.

FIG. 5 is a plan view of a soldering iron.

FIG. 6 is a front view of an electric stove.

FIG. 7 is a conventional electric circuit diagram of an electric stove.

8 is a cross-sectional view taken along the line LL in FIG.

FIG. 9 is a conventional electric circuit diagram of an electric stove.

10 is a cross-sectional view taken along the line LL in FIG.

FIG. 11 is an electric circuit diagram of the electric stove according to the present invention.

12 is a cross-sectional view taken along the line LL in FIG.

[Explanation of symbols]

1 ... Heating element "1A, 1B" 6 ... Rectifying diode 2 ... Changeover switch 7 ... Grip 3 ... Triac 8 ... Iron tip 4 ... Control circuit 9 ... Code 5 Control switch 10 Main unit 14 Power switch 11 Heat reflection plate 15 Heat reflection range 12 Stand 16 Power switch 13 Power switch

Claims (1)

[Claims] 1. In a device that uses an AC power source (AC) connected to a heating element (1) having electrical resistance, a control switch (5) and a rectifying diode (6) are connected in parallel,
A heating value control device for a heating element having electric resistance, characterized by being connected between an alternating current power source (AC) and the heating element (1). 2. The heat generation amount control device for a heat generation element having an electric resistance according to claim 1, wherein the heat generation amount of a soldering iron formed by incorporating a heat generation element (1) having an electric resistance is controlled. 3. The heat generation amount control device for a heat generation element having an electric resistance according to claim 1, wherein the heat generation amount of an electric stove configured by incorporating the heat generation element (1) having an electric resistance is controlled.