JPH0126968Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a combustion type heating device such as a stove or a gas rice cooker. Specifically, the present invention is directed to a DC power supply device in which a positive electrode is connected to a metal burner, and generates an electromotive force through heating by the burner. A thermoelectric element that generates electricity and a circuit that boosts the voltage from the thermoelectric element are provided, and the DC power supply device applies a potential difference between the burner and the metal object to be heated. The heat transfer efficiency to the heated object is improved by the effect of the electric field, and the electric power for applying the potential difference is provided by the electromotive force of the thermoelectric element that uses combustion heat, eliminating the need for an external power source. It relates to a combustion type heating device.

As the above-mentioned combustion type heating device, one in which a thermoelectric element was simply placed near the burner was previously proposed in Utility Model Application No. 173,976/1983.

However, simply placing the thermoelectric element near the burner will cause the temperature of the entire thermoelectric element to rise due to the combustion heat, making it difficult to create a large temperature difference between the two poles of the thermoelectric element, making it difficult to obtain a large electromotive force. As a result, the thermoelectric elements become larger, the required number becomes larger, leading to larger and more complex overall structures, or the electric potential difference and electric field strength applied between the object to be heated and the burner become larger and more complicated. There was still room for improvement in the use of thermoelectric elements, such as insufficient heat transfer efficiency and failure to achieve a sufficient improvement in heat transfer efficiency.

The purpose of the present invention is to improve the rational arrangement of thermoelectric elements by utilizing the original usage pattern of combustion heating devices, to enable each thermoelectric element to generate electromotive force efficiently, and to improve safety against potential difference application. At the point.

The characteristic configuration of the combustion type heating device according to the present invention is that a thermoelectric element that generates an electromotive force by heating with a burner,
so that the high temperature side is away from the heated object, and
The reason is that the low temperature side is placed in contact with the object to be heated, and its functions and effects are as follows.

In other words, by keeping the low-temperature side of the thermoelectric element in contact with the object to be heated, the temperature increase on the low-temperature side of the thermoelectric element due to the combustion heat of the burner can be effectively suppressed by the cooling effect of the object to be heated and its contents. , and by keeping the high temperature side of the thermoelectric element away from the heated object,
Since the high-temperature side of the thermoelectric element can be effectively heated by combustion heat without the cooling effect of the heated object, it is possible to create and maintain a large temperature difference between the high-temperature side and the low-temperature side of the thermoelectric element. This has made it possible to efficiently generate large electromotive force in thermoelectric elements.

As a result, we have been able to miniaturize thermoelectric elements and reduce the number of thermoelectric elements required, making the overall configuration of the device compact and simple. It has become possible to effectively improve heat transfer efficiency.

Moreover, a large electromotive force is generated as described above only when the object to be heated is at a predetermined heating position, and when there is no object to be heated, the electromotive force of the thermoelectric element decreases, and accordingly. Since the voltage applied to the burner with no object to be heated is reduced, it is possible to reliably prevent electric shock caused by accidentally touching the burner with the positive electrode when there is no object to be heated, thereby improving safety.

Next, embodiments will be described based on the drawings.

As shown in FIG. 1, a gas burner 5 connected to a fuel gas supply pipe 4 is installed inside a metal casing 3 equipped with a trivet 2 for placing an object 1 to be heated such as a pot,
The stove heats the object to be heated 1 by inhaling combustion air from the air intake port a along with the gas supply and burning a mixture of these gases and air in the burner 5. be.

The burner 5 is made of metal, and the mixture flow path forming pipe 6 that communicates and connects the burner 5 and the gas supply pipe 4 is made of ceramic, and the burner is constructed with the ceramic flow path forming pipe 6 serving as an insulator. 5 is installed inside the casing 3 and electrically insulated from the casing 3 and the gas supply pipe 4.

Then, a ground wire E is connected to the casing 3, and the metal heated object 1 placed on the trivet 2 is configured to be grounded via the metal trivet 2 and the metal casing 3, Casing 3
The positive electrode terminal of the DC power supply device 7 installed inside the burner 5 is connected to the burner 5 body via the covered wire 8, and in the combustion state, the placed heated object 1 is used as the negative electrode, and the metal burner The structure is such that a predetermined potential difference V between 3KV and 6KV is applied between both 1 and 5 with 5 being the positive electrode.

In other words, with the above configuration, the object to be heated 1 and the burner 5
By accelerating the motion of charged particles in the combustion flame in one direction by the action of the electric field generated between
It is designed to effectively improve the heat transfer efficiency of combustion heat to the object to be heated 1, in other words, to improve the thermal efficiency of the stove.

As shown in FIGS. 1 to 3, the DC power supply device 7 includes a thermoelectric element that generates an electromotive force using combustion heat from the burner 5, in each of the collar portions 2A arranged radially on the trivet 2. 9 is incorporated into the interior in a state of being electrically insulated from the metal trivet 2 itself, and the thermoelectric elements 9 are electrically connected to the transformer circuit 10 in a state in which they are connected in series with each other. so that the voltage from
In other words, it is configured to be self-sufficient in electricity for providing an electric field by effectively utilizing combustion heat.

Further, by equipping the thermoelectric element 9 so as to be used as a component of the trivet 2, the structure around the burner 5 is simplified, and the overall structure of the device is made compact and simple.

In the figure, 11 is a thermally conductive electrical insulator.

When the thermoelectric element 9 is installed in the flange 2A of the trivet 2, the high temperature side of the thermoelectric element 9 is located on the tip side of the flange 2A located in the center of the burner 5, and its radius is adjusted relative to the burner 5. Each thermoelectric element 9 is arranged internally so that the low temperature side of the thermoelectric element 9 is located on the proximal end side of the collar 2A, which is spaced apart in the direction, and when the object to be heated 1 is placed on the trivet 2, The trivet 2 is formed with each collar 2A arranged in an inclined manner so that the tip side is farther away from the object 1 to be heated and the base end of the collar 2A is in contact with the object 1 to be heated.

In other words, by keeping the base end of the flange 2A, where the low temperature side of the thermoelectric element 9 is located, in contact with the object to be heated 1, the temperature of the low temperature side of the thermoelectric element 9 due to the combustion heat of the burner 5 increases. The content is effectively suppressed by the cooling effect, and the tip of the flange 2A where the high temperature side of the thermoelectric element 9 is located is connected to the heated object 1.
By keeping the heated object 1 away from the temperature, the temperature of the high temperature side of the thermoelectric element 9 can be effectively raised by combustion heat without cooling the object 1, and there is a gap between the high temperature side and the low temperature side of the thermoelectric element 9. It is configured to maintain a large temperature difference, thereby allowing each thermoelectric element 9 to function efficiently and obtaining a large electromotive force.

Next, another embodiment will be described.

If the thermoelectric element 9 is also used as a component of the trivet 2,
As long as the grounding structure for the metal object to be heated 1 and the electromotive circuit of the thermoelectric element 9 do not interfere with each other, the collar portion 2A of the trivet 2 may be configured to double as the thermoelectric element 9 itself.

Further, if the thermoelectric element 9 is also used as a component of the trivet 2, it is advantageous to make the device configuration more compact.
The thermoelectric element 9 may be arranged as a separate member from the constituent members of the trivet 2, and in this case, various improvements can be made to the thermoelectric element mounting structure.

The number of thermoelectric elements 9 arranged in parallel can be changed as appropriate.

Furthermore, since the thermoelectric element 9 is arranged so that its low temperature side is in contact with the object to be heated 1 and its high temperature side is away from the object to be heated 1, the contact between the low temperature side and the object to be heated is not direct. In other words, the contact structure may be such that the object to be heated 1 has a cooling effect on the low-temperature side by heat conduction. The specific distance between the side and the object to be heated can also be changed as appropriate.

The present invention is intended for various combustion type heating devices such as stoves and gas rice cookers.

[Brief explanation of the drawing]

1 to 3 show embodiments of the present invention,
Figure 1 is an overall schematic diagram, Figure 2 is a plan view, and Figure 3 is a plan view.
The figure is an enlarged sectional view of main parts. 1... object to be heated, 2... trivet, 5... burner,
7...DC power supply device, 9...thermoelectric element, 10...
Transformer circuit.

Claims (1)

[Claims for Utility Model Registration] A DC power supply device 7 whose positive electrode is connected to a metal burner 5 includes a thermoelectric element 9 that generates an electromotive force when heated by the burner 5, and the thermoelectric element 9.
The combustion heating device is configured to provide a potential difference V between the burner 5 and the metal heated object 1 by means of the DC power supply 7, and is provided with a circuit 10 for boosting the voltage from the thermoelectric Element 9
The combustion type heating device is arranged such that the high temperature side thereof is away from the object to be heated 1 and the low temperature side thereof is in contact with the object to be heated 1. The heating device according to claim 1, wherein the thermoelectric element 9 is a component of the trivet 2.