JPS6364691B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a canopy kotatsu in which the power supply to a heating element provided in the main body of the canopy kotatsu can be wirelessly controlled by an operation unit provided on a table board.

<Prior Art> Conventional Yagura Kotatsu, for example, a Yagura Kotatsu in which a control circuit that controls the energization of a heating element provided in the Yagura Kotatsu body is operated by an operation unit provided on the table board, is a type of Yagura Kotatsu that uses the operation unit on the table board and the control circuit of the Yagura Kotatsu body. It is constructed by connecting the circuit with a lead wire (cord), so when using the kotatsu futon on the Yagura Kotatsu body, the lead wire gets in the way and the table board cannot be placed in any direction. There was a drawback that I couldn't do it.

<Objective> The object of the present invention is to provide a kotatsu that eliminates the above-mentioned drawbacks.

<Example> An example of the Yagura Kotatsu of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the Yagura Kotatsu of the present invention includes a Yagura Kotatsu main body 1, a heating element (load) 2, and a control circuit (control device) 3 for controlling electricity supply to the heating element 2.
An operating section 4 for operating the control circuit 3 is removably provided on a table board 6 placed on the kotatsu main body via a kotatsu futon 5, and the operating section 4 of the table board 6 and the above kotatsu main body 1 are connected to each other. The control circuit 3 is wirelessly connected to the control circuit 3 by capacitor coupling.

In FIG. 1, 7 is a power cord having a power plug 8 connected to a power source.

FIG. 2 is a block diagram of the control system of the Yagura Kotatsu shown in FIG. 6 is a table plate, 9A and 9B are electrode plates arranged on the table plate 6, and 10A and 10B are Yagura Kotatsu body 1.
The stray capacitance C _A between the electrode plate 10A and the electrode plate 9A and the electrode plate 10B
The stray capacitance CB between the electrode plate 9B and the control circuit 3 and the operating section 4 serve as a capacitor component.
and are connected wirelessly (relay) using a capacitor connection. 12 is a detection unit that detects the oscillation frequency of the oscillator 11 varied by the operation unit 4;
13 is an amplifier for amplifying the output of the detection section 12;
Reference numeral 4 denotes a control section that controls the energization of the heating element 2 based on the output of the detector 12 amplified by the amplifier 13.

In the Yagura Kotatsu of the present invention configured as described above, when the user operates the operation section to control the temperature of the heating element 2 by energization rate control or temperature control, the oscillation signal oscillated by the oscillator 11 is transmitted to the capacitor. It is transmitted to the operating section 4 via the component C _A (capacitance between the electrode plate 9A and the electrode plate 10A), the oscillation signal is varied by the operating section 4, and the capacitor component C _B
(capacitance between electrode plate 9B and electrode plate 10B) is detected by the detection unit 14. Then, the detector 14 outputs a temperature control signal based on the variable oscillation signal, the temperature control signal is amplified by the amplifier 13, and the control unit 14 controls energization to the heating element 2 based on this temperature control signal. Then, temperature control is performed according to the temperature control signal.

<Effects of the Invention> Since the Yagura Kotatsu of the present invention has the above-described configuration, a futon can be placed on the Yagura Kotatsu body very easily, and the table board can be placed in any direction. On the other hand, since it is only necessary to provide the operating section that changes the oscillation frequency on the table board, the space for installing the operating section on the table board can be created by using a variable resistor, a monostable multivibrator, a battery to power them, etc. on the table board. It is extremely small compared to those equipped with a temperature control signal generator, and there is no need to secure special space for installing the operating section on the table board, and the operating section can be easily installed at the desired position on the table board. Furthermore, since the battery that powers the table board can be eliminated, there is no need for battery maintenance and inspection, and the operation part of the table board and the control circuit of the Yagura Kotatsu body are connected wirelessly by capacitor coupling. Therefore, compared to the method in which the temperature control signal generated by the temperature control signal generation means of the electric kotatsu table is transmitted to the temperature control signal detection means provided on the frame base of the electric kotatsu via a medium selected from the coil and iron core. The control circuit of the Yagura Kotatsu body is controlled by the table board working part more reliably, and is less affected by the noise that occurs when controlling the temperature of surrounding equipment such as an electric heater or electric carpet. In addition, the space on the table plate in which the electrode plate for capacitor coupling is provided can be small, and it can be easily provided at a desired position on the table plate.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the kotatsu of the present invention, and FIG. 2 is a block diagram of the control system of the kotatsu of FIG. 1. In the drawing, 1 is the Yagura Kotatsu body, 2 is the heating element,
3 is a control circuit, 4 is an operating section, and 6 is a table board.

Claims (1)

[Scope of Claims] 1. Only the operating parts having variable functions such as variable capacitors, variable resistors, variable coils, etc. that vary the oscillation frequency of the oscillator provided in the Yagura Kotatsu body are mounted on the table board placed on the Yagura Kotatsu body. a control circuit comprising: a detection section that detects the oscillation frequency varied by the operation section; a control section that controls energization of the heating element provided in the Yagura Kotatsu body based on the output of the detection section; and a control circuit that includes the oscillator. is provided on the Yagura kotatsu body, and the control circuit of the Yagura kotatsu body and the operating section of the table board are wirelessly connected by capacitor coupling.