JPS6267888A - Thermoelectric power generation device - Google Patents

Abstract

PURPOSE:To make the device in a small size and simplify the structure as well as to obtain a thermoelectric power generation device which has a good generation efficiency and is suitable for small capacity, by using a thermoelectric conversion device which uses black ceramics as the substrate for a heat- absorbing plate. CONSTITUTION:In a thermoelectric power generation device 20, by connecting a load 14 between terminals 9, 10, applying the thermal energy of the solar rays preferably collected through a Fresnel lens 13 to the sbstrate 1 side to heat it, and dissipating the heat from the substrate 2 side through radiator fins 11, a predetermined power can be supplied to the load 14. Since, in this case, black ceramics is used as the substrate 1, the solar energy can well be collected, enabling the radiant heat of the solar energy to be utilized. With this, a desirable generation efficiency can be obtained. By using a thermoelectric conversion device which uses black ceramics as the substrate for a heat- absorbing plate, the device is made in a small size, the structure is simplified, and a thermoelectric power generation device which has a good generation efficiency and is suitable for small capacity is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermal power generation device that generates electricity using heat radiated from a heating element such as solar thermal energy.

[Prior Art] Conventional IA that generates electricity using the heat radiated from a heating element such as solar thermal energy generates heated steam using the heat radiated from a heating element such as solar thermal energy, and the pressurized steam is A device is known that generates electricity by driving a steam engine connected to a generator. In this conventional device, the device is large and complicated, and the power generation efficiency is very low.Furthermore, it is not suitable for a small capacity device, and is not very satisfactory.

[Problems to be Solved by the Present Invention] The present invention has been made in view of the above-mentioned points, and aims to provide a small device, a simple structure, high power generation efficiency, and The purpose is to provide a solar thermal power generation device suitable for small size.

[Means for Solving the Problems] The object of the present invention is to provide a heat sink having a high thermal conductivity, in which a large number of electrode plates are bonded to one side of a heat absorbing plate made of a black ceramic substrate. A large number of electrode plates are electrically insulated and bonded to each other on one surface, and each of a large number of semiconductor elements for thermoelectric conversion is bonded to one surface of the heat absorption plate facing each other, and the heat dissipation plate is bonded to one surface of the heat absorption plate. This is achieved by a thermoelectric generator formed by bonding electrode plates F1i to one side of the plate, respectively.

Since a black ceramic substrate is used for the heat absorbing plate of the thermal power generation device of the present invention, it has excellent heat collection properties and can provide satisfactory thermal conductivity, heat resistance, and electrical insulation.

In addition, a ceramic substrate or a gold ASS plate with an electrically insulating film bonded to one surface can be used as the heat sink, and each has a certain degree of thermal conductivity, heat resistance, and electrical insulation. Obtainable. The thickness of the ceramic or metal substrate can take various values from the viewpoint of thermal time constant and mechanical strength, and in a preferred embodiment, this thickness is 0.5 as
+2 am, and in order to improve the heat dissipation characteristics, a large number of heat dissipation fins may be provided integrally or separately on the heat dissipation surface as the other surface of the heat dissipation member, and when the fins are provided in this way, the mechanical The optical strength is increased, a thin substrate can be used, and at the same time, the substantial thermal time constant can be reduced, and favorable characteristics can be obtained.

1 in the thermal lightning conversion device used in the thermal power generation device of the present invention
The insulating film used in the specific example is preferably a resin with excellent heat resistance, and an insulating film having a self-adhesive function may be used to adhere it to a metal plate. Further, this insulating film, ie, film, is preferably formed as thin as possible from the viewpoint of thermal conductivity. When adhering an insulating film that does not have a self-adhesive function to a metal plate, it is preferable to use an adhesive.

Copper, nickel, tin, etc. can be preferably used as the electrode plate of the present invention, and when a plate made of these metals is printed on a ceramic substrate with a thin film of copper paste, it can be applied to an insulating film of a metal substrate. An electrode plate is formed by bonding the electrode plate with an adhesive. In a preferred embodiment, the electrode plate is formed from a copper plate with a thickness of 0.5 um. The electrode plate and the insulating film may be bonded together using the adhesive described above.

The present invention will be explained in more detail below using preferred specific examples shown in the drawings.

In FIG. 1, the thicknesses of the black ceramic substrate 1 and the ceramic substrate 2 are each 0.635j in this specific example.
It is s*. A large number of electrode plates 3 and 4, which are separated from each other, are adhered to one side of the substrates 1 and 2 facing each other by printing a thin film with copper paste, and the thickness of the copper electrode plates 3 and 4 is different from each other. 0.5jwy. Here, when a metal substrate is used as the substrate 2, the electrode plate 4 is bonded to the substrate 2 via an insulating film. In this way, the electrode plate 3 is bonded to the heat absorbing plate 5 made of the substrate 1, and the heat dissipating plate 6 made of the substrate 2.
P-type semiconductor elements 7 and N-type semiconductor elements 8 for thermal lightning conversion are alternately arranged between the electrode plate 4 bonded to the electrode plate 4, and the semiconductor elements 7 and 8 face each other at one end surface. Semiconductor elements 7 and 8, which are bonded to electrode plates 3 and 4 by soldering and alternately arranged between terminals 9 and 10, are electrically connected in series.

Furthermore, in order to improve the heat dissipation effect of the heat sink 6, a heat sink fin 11 made of a metal plate may be provided on the heat sink side of the heat sink 6.

In addition, sunlight I! which is applied to the heat absorption plate 5! 12 is preferably focused by a Fresnel lens 13, thereby making it possible to further enhance the heat collecting effect.

[Function] This is a thermoelectric power generation bag configured like this! At 120,
When a load 14 is connected between terminals 9 and 10, the substrate 1 side is heated by applying the thermal energy of concentrated sunlight, preferably through a Fresnel lens 13, and the heat is radiated from the substrate 2 side through the radiation fins 11. A predetermined power can be supplied to 14. In this case, since black ceramic is used for the substrate 1, solar energy can be efficiently converted into heat, and radiant heat of solar energy can also be utilized. Therefore, preferable power generation efficiency can be obtained.

[Effects] As described above, according to the present invention, since a thermoelectric conversion device using black ceramic as the substrate for the heat absorbing plate is used, the device is small, has a simple structure, and has high power generation efficiency. Furthermore, a thermal power generation device suitable for small capacity can be obtained.

[Brief explanation of drawings]

The figure is a perspective view of a preferred example of an integrated body according to the present invention. 1.2... Substrate, 3.4... Electrode plate,
7.8...Semiconductor element.

Claims (4)

[Claims] (1) A large number of electrode plates are bonded to one side of a heat absorbing plate made of a black ceramic substrate, and a large number of electrode plates are bonded to one side of a heat sink with high thermal conductivity. The electrode plate is insulated and bonded to one side of the heat absorbing plate, and the electrode plate is bonded to one side of the heat sink, and each of the semiconductor elements for thermoelectric conversion faces each other. A thermal power generation device that is glued together. (2) The thermal power generation device according to claim 1, wherein the heat sink is made of a ceramic substrate. (3) The thermal power generation device according to claim 1, wherein the heat dissipation plate comprises a metal substrate with an electrically insulating film adhered to one surface. (4) The thermal power generation device according to any one of claims 1 to 3, wherein a heat radiation fin is provided on the other surface of the heat radiation plate.