JPS6329197B2 - - Google Patents

Abstract

PURPOSE:To release heat smoothly, by a method wherein a condensing part of a heat pipe is provided in the exterior of and above a heat-accumulating tank in which a latent heat type heat-accumulating material and a condensable gas such as flon are sealed, and an evaporating part of the heat pipe is located in a gaseous phase part provided at an upper part of the interior of the tank. CONSTITUTION:In accumulating heat, when heat is applied to the heat-accumulating material 2 by a heater 4 provided at a bottom part of the heat-accumulating tank 1, the condensable gas 3 such as flon moves upward in the form of bubbles while liquefying the material 2, and fills the gaseous phase part 5. In releasing heat, when a blower 11 is operated, heat is removed from heat-releasing fins 9, the condensable gas is condensed into a liquid at the condensing part 10 of the heat pipes 7, and drips along inside walls onto the material 2. Since the condensed gas 3 has a high specific gravity, it falls into the material 2, receives heat from the material 2, and again moves upward in the evaporated state. At the condensing part 10, pressure is lowered as the gas 3 is condensed, so that the gas 3 being evaporated is sucked into the condensing part 10 due to the pressure difference between the condensing part 10 and the gaseous phase part 5. Accordingly, heat can be smoothly released from the material 2, and can be taken out effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat storage device using a latent heat storage material.

Configuration of conventional example and its problems In the conventional heat storage device, as shown in FIG. Either a circuit in which water circulates is configured to extract heat from the latent heat storage material 2, or as shown in FIG. 8 is inserted, and the condensing part 10 of the heat pipe 7 is protruded above the outside of the heat storage tank 1 to exchange heat with water, thereby extracting heat to the outside.

However, in such a configuration, when the latent heat storage material 2 becomes a solid phase, heat conduction is poor, and depending on the type, there may be overcooling, resulting in heat transfer to the internal heat exchanger 21 or the evaporation section 8 of the heat pipe 7. The drawback was that movement was hindered and heat could not be sufficiently released.

Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, and by introducing a condensable gas such as fluorocarbon into a latent heat storage material, convection of the condensable gas due to a change in specific gravity accompanying a phase change of the condensable gas is achieved. The purpose of this technology is to easily extract heat from the latent heat storage material.

Composition of the Invention In order to achieve the above object, the heat storage device of the present invention includes a cylindrical condensing section projecting above the outside of a heat storage tank filled with a latent heat storage material such as hydrated salt and a condensable gas such as fluorocarbon. The lower end of this condensing section faces the gas phase at the upper part of the heat storage tank. During heat dissipation, condensable gases such as fluorocarbons in the condensing section are cooled by air and condensed, increasing their specific gravity and releasing latent heat. It sneaks under the heat storage material. In the condensing section, the pressure decreases due to condensation of the gas, and the liquefied gas in the latent heat storage material absorbs heat from the surrounding latent heat storage material and becomes bubbles and moves to the condensing section.

Since convection occurs in this way, the heat from the latent heat storage material is not locally supercooled, and the heat from the latent heat storage material is smoothly radiated from the condensation section above the outside of the heat storage tank using condensable gas as a medium. It has the effect of being able to.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, reference numeral 1 denotes a heat storage tank filled with a latent heat storage material 2 and a condensable gas 3 such as fluorocarbon, and a heater 4 is provided at the bottom of the heat storage tank 1. Reference numeral 5 denotes a gas phase section provided in the upper part of the heat storage tank 1, which is filled with vaporized condensable gas 3. 6 is a heat insulating material provided in the heat storage tank 1. Reference numeral 7 denotes a cylindrical condensing section protruding upward from the outside of the heat storage tank 1, and a lower end 8 of the condensing section 7, which acts as an evaporation section, is provided facing the gas phase section 5 inside the heat storage tank 1. . Reference numeral 9 denotes a heat radiation fin provided in an upper part 10 of the condensing section 7, and a blower 11 is provided opposite to this heat radiation fin 9.

The operation of the above configuration will be explained below.

First, during heat storage, when heat is applied to the latent heat storage material 2 by the heater 4 provided at the bottom of the heat storage tank 1, the condensable gas 3 in the latent heat storage material 2 becomes bubbles and moves upward, causing the surrounding The latent heat storage material 2 is heated and liquefied, and the gas phase portion 5 is filled with condensable vaporized gas.

During heat radiation, when the blower 11 is operated, heat is taken away from the heat radiation fins 9, the condensable gas is liquefied in the condensing part 7, and the latent heat storage material 2 is liquefied along the inner wall of the condensing part 7.
Drip onto the. Since this liquefied condensable gas 3 has a higher specific gravity than the latent heat storage material 2, it descends into the latent heat storage material 2, receives heat from the surrounding latent heat storage material 2, and rises again as vaporized gas. In addition, in the condensing section 7, the pressure decreases as the condensable gas 3 liquefies, and due to the pressure difference with the gas phase section 5, the latent heat storage material 2
The condensable gas 3 inside is sucked into the condensing section 7 while being vaporized.

As described above, according to the heat storage device of this embodiment, heat can be smoothly radiated from the latent heat storage material 2 by the action of the condensing section 7 using the condensable gas 3 as a medium, and the convection action of the condensable gas 3 This has the effect that heat can be effectively taken out from the latent heat storage material 2 without overcooling the latent heat storage material 2.

Effects of the Invention As described above, according to the heat storage device of the present invention, a latent heat storage material such as hydrated salt and a condensable gas such as fluorocarbon are sealed in a heat storage tank, and a condensing section using the condensable gas as a working medium is activated. As a result, heat from the latent heat storage material can be effectively extracted to the outside, and the structure of the device can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a heat storage device according to an embodiment of the present invention, and FIGS. 2 and 3 are side sectional views showing conventional heat storage devices. DESCRIPTION OF SYMBOLS 1... Heat storage tank, 2... Latent heat storage material, 3... Condensable gas, 5... Gas phase part, 7... Condensing part, 8... Lower end part, 10... Upper part.

Claims (1)

[Claims] 1. A cylindrical condensing part for condensing gas is provided above the exterior of a heat storage tank filled with a latent heat storage material such as hydrated salt and a condensable gas such as fluorocarbon, and the lower end of the condensing part is connected to the A heat storage device that faces a gas phase section in an upper part of a heat storage tank and uses the condensable gas as a working medium of the condensing section.