JPH01242100A - Induction heating type iron - Google Patents

Abstract

PURPOSE:To obtain an induction heating type iron which has a safety device that an iron stand does not heat anything other than the iron body on it by a method wherein a control circuit is made so that the operation of an inverter may be continued, only the time when power supplied into the inverter is above a specified value and the inverter gets temperature information from the iron main body. CONSTITUTION:In the first place, an inverter (5) is operated by a circuit for generating pulses during a specified time. In this case, when an iron main body (1) is placed on an iron stand (3), temperature information that the temperature is rising is transmitted from it (1), and an output of a voltage comparator (9) is at high level. Since an output of an input current detector (13) also is at high level, an output of an AND circuit (11) is at high level and the operation of the inverter (5) is continued. On the other hand, when the iron main body (1) is not placed on the iron stand (3), the operation of the inverter (5) is not continued. It is therefore possible to obtain an induction heating type iron which has a safety device that the iron stand (3) does not heat anything except the iron main body on it.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an induction heating iron for general household use.

2. Description of the Related Art In a conventional induction heating iron, as shown in FIG. 3, when the iron body 16 is placed on a heating coil 17 of an ironing board 16, an inverter 18 is activated to heat the iron body 15.

Problems to be Solved by the Invention In the conventional configuration described above, even when the iron main body 15 is not placed on the heating coil 17 of the ironing board 16, and instead, for example, an iron plate, a spoon, etc. are placed, the inverter 18 operates to heat the iron body 15. The coil 17 heats the iron plate, spoon, etc., and is extremely dangerous.

The present invention was conceived in view of such problems, and an object of the present invention is to provide a safe induction heating iron that does not heat anything other than the iron itself even if it is placed on the ironing board. It is something to do.

Means for Solving the Problems The induction heating type iron of the present invention includes: an iron main body having temperature information transmitting means; an inverter including a heating coil for inductively heating the iron main body; a control circuit for driving the inverter; and a temperature information receiving means for receiving temperature information from the iron body, and the control circuit is configured to operate when the electric power input to the inverter is more than 1 centimeter and the temperature information from the iron body is obtained by the receiving means. Only in this case, the inverter continues to be driven.

Effect: With the above configuration, if an object other than the iron body, such as an iron plate or a spoon, is placed on the heating coil, the temperature information cannot be obtained, so the inverter is not driven.
They are not heated. In this way, since nothing other than the iron body is heated, it is safe for the user.

EXAMPLE An example of the present invention will be described below with reference to the drawings. 1st
As shown in the figure, the iron body 1 includes a temperature information transmitting means 2, and the iron board 3 includes an inverter 6 including a heating coil 4 for inductively heating the iron body 1, and a control circuit 6 for driving the inverter 5. Also included is temperature information receiving means 7 that receives temperature information from the iron body 1.

The configuration of the control circuit 6 includes a differentiation circuit 8, a voltage comparison circuit 9,
Pulse generation circuit 1o, AND circuit 11°OR circuit 12
It consists of

The input current detection means 13 detects the input current during operation of the inverter 6, and when there is an object to be heated, the input current is set to HIGH level,
When there is no object to be heated, a LOW level is output. Further, the output of the temperature information receiving means 7 is at a LOW level when there is no information from the temperature information receiving means 2, and at a level proportional to it when there is such information.

If the input from the temperature information receiving means 7 is increasing over time, the differentiating circuit 8 outputs an output proportional to the increase, and otherwise outputs a LOW level.

The voltage comparison circuit 9 outputs a HIGH level if the input from the differentiating circuit 8 is above a certain level, and a LOW level otherwise.

The pulse generating circuit 1o outputs pulses in the form shown in FIG. The inverter 6 operates when the output of the OR circuit 12 is at HIGH level, and does not operate when the output is at LOW level.

With the above configuration, first, the inverter 5 is operated by the pulse generating circuit 10 for a certain period of time.

At this time, if the iron body 1 is on the ironing board 3, temperature information is transmitted and the content indicates that the temperature is rising, so the output of the voltage comparison circuit 9 is HIGH.
Becomes H level. In addition, since the output of the input current detection means 13 also becomes HIGH level, the output of the AND circuit 11 becomes HIGH.
It becomes the GH level and the operation of the inverter 6 continues. If the iron body 1 is not on the ironing board 3, the operation of the inverter 5 will not continue.

In this way, even if the user mistakenly places something other than the iron body 1 on the ironing board 3, it is possible to prevent it from being heated.

The input current detection means 13 in this embodiment is for checking the presence or absence of a load, and for example, detects the presence or absence of a load by reading changes in the impedance of the heating coil 4 from the voltage of the heating coil 4. You can.

Effects of the Invention As described above, the present invention detects both the temperature information from the iron body and the power input to the inverter to determine whether or not to continue operating the inverter.As long as the iron body is not on the ironing board, , the operation of the inverter is not continued. As a result, the induction heating type iron is safe because it does not accidentally heat another object to be heated. Further, even if ironing is temporarily stopped, the operation of the inverter is not continued, making the induction heating type iron advantageous in terms of power consumption.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an induction heating iron according to an embodiment of the present invention, FIG. 2 is an output diagram of the same pulse generating circuit, and FIG. 3 is a schematic diagram showing a conventional induction heating iron. 1...Iron body, 2...Temperature information transmission means, 3...Ironing board, 4...
Heating coil, 5... Inverter, 6...
・Control a circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 20#l5ec. E-A”CJ-n end 16-Iron too

Claims (1)

[Claims] The iron body has a temperature information transmitting means, an inverter including a heating coil for induction heating the iron body, a control circuit for driving the inverter, and a temperature information receiving means for receiving temperature information from the iron body. , the control circuit continues to drive the inverter only when electric power entering the inverter is above a certain level and temperature information from the iron body is obtained by the receiving means.