JPS608648A - Hot-water supplying device - Google Patents

Abstract

PURPOSE:To obtain the high temperature hot-water by utilizing the exothermic reaction of a hydrogen occlusion alloy. CONSTITUTION:A metallic compound is filled into a vessel 2 provided at the upper part of a hot-water storage tank 1 and a vessel 3 provided at the outside of the hot-water storage tank 1, both vessels are communicated with a communicating pipe 4 so that a hydrogen is able to be communicated through. In the operation of a compressor 12, the high temperature hot-water can be supplied only with the operation of a pump 5 by the stopping of the compressor 12 due to the high water temperature of the inlet of a water refrigerant heat exchanger 8, and by utilizing of exothermic effect due to the hydrogen occlusion of a hydrogen occlusion alloy during the hot-water supply.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention raises the temperature of hot water by utilizing the thermal energy released when two types of metal hydride compounds with different temperature-pressure characteristics absorb and release hydrogen. Regarding.

[Prior art]

As shown in FIG. 1, in a conventional heat pump water heater, the latent heat of condensation of a high-temperature, high-pressure gas refrigerant discharged from a compressor 12 is used in a water-refrigerant heat exchanger 8 to circulate water in a hot water storage tank 1 through a pipe 5. As a result, the water in the hot water storage tank 1 is heated, becomes a high-pressure liquid refrigerant, passes through the expansion valve 9, and enters the outdoor heat exchanger 10 as a low-temperature, low-pressure liquid refrigerant. Here, it absorbs the latent heat of vaporization from the outdoor air and becomes a low-pressure gas refrigerant, which drives the compressor 12.
Hot water is supplied by heating the water in the hot water storage tank l by inhaling the water into the water/refrigerant heat exchanger 8.
When the temperature rises, the discharge pressure of the compressor 12 increases rapidly, so the input to the compressor 12 also increases, resulting in a decrease in the coefficient of performance.

[Purpose of the invention]

The purpose of the present invention was to improve the above-mentioned drawbacks, and the operation in the high temperature range, which is a drawback of heat pump water heaters, is stopped, and hot water is supplied at high temperatures by utilizing the exothermic reaction of the hydrogen storage metal. This is what I did to get it.

[Summary of the invention]

In other words, when hot water is supplied by utilizing the property of metal flies, which have different temperature-pressure characteristics, to absorb heat exothermically to form metal hydride compounds, and to absorb heat reversibly to release hydrogen, it is possible to When hot water is used to heat a metal hydride compound stored in a container outside the hot water storage tank, the hydrogen in the container absorbs heat, is stored in the container in the hot water storage tank, and generates heat, causing the hot water to be heated. It raises the temperature.

[Embodiments of the invention]

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

A container 2 provided at the top of the hot water storage tank 1 and a container 3 provided outside the hot water storage tank 1 are filled with a metal compound and communicated through a communication pipe 4 so that hydrogen can flow therethrough. The outer wall of the container 3 is provided with fins to quickly dissipate heat.

Further, the container 3 has a structure that allows indirect heat exchange between the hot water sent by the pump 5 and the metal compound. Furthermore, water on-off valves 13 and 14 are provided at the outlet of the pump 5, and the water can be circulated to the water heat exchanger 8 of the heat pump water heater, which is connected to the upper part of the hot water storage tank. Next, the operation will be explained.

The refrigerant compressed by the compressor 12 becomes a high-temperature, high-pressure gas that enters the water-refrigerant exchanger 8 and is circulated by the pump 5 through the on-off valve 1.
4, enters the water/refrigerant heat exchanger 8, undergoes heat exchange, and enters the hot water storage tank 1 from above. When the temperature of the circulated hot water reaches the set temperature, the compressor 12 is stopped, and when hot water is supplied from the faucet 6, the on-off valve 13 is opened and 14 is closed, and the pump 5 is operated, so that the hot water passes through the container 3 and enters the hot water storage tank. I can do it. At this time, the hydrogen storage alloy filled in the container 3 emits hydrogen endothermically and enters the container 2 through the communication pipe 4. When the metal alloy absorbs hydrogen exothermically and forms a metal compound, inside the hot water storage tank 1. This means that hot water with a higher temperature can be dispensed from the faucet 6.

〔Effect of the invention〕

Therefore, according to the present invention, the compressor 12 is operated by stopping the compressor 12 when the temperature of the water at the inlet of the water-refrigerant heat exchanger 8 becomes high, and generating heat when the hydrogen storage alloy absorbs the water flow during hot water supply. If this is used, high-temperature hot water can be dispensed only by operating the pump 5, so that an economical water heater without lowering the coefficient of performance can be provided.

[Brief explanation of the drawing]

Figure 1 is a structural piping diagram of a conventional heat pump water heater, Figure 2
The figure is a structural piping diagram of a water heater equipped with an embodiment of the present invention. 1... Hot water storage tank, 2, 3... Hydrogen storage alloy filling container A4... Communication pipe, 5... Pump, 6... Faucet, 7
... Water supply valve, 8 ... Water refrigerant heat exchanger, 9 ... Expansion valve, 10 ... Outdoor heat exchanger, 11 ... Fan, 12
...Compressor, 13.14...Opening/closing valve.

Claims (1)

[Claims] 1. Two sealed containers storing hydrogen and a hydrogen storage alloy with different temperature-pressure characteristics are shouldered, one container is placed above the hot water tank, and the other is placed outside the hot water storage tank. A water heater characterized in that two containers are provided in communication with each other. 2. Claim 1, characterized in that the temperature rise in the container outside the connected hot water storage tank is caused by circulating the hot water inside the hot water storage tank.
Water heater described in section. 3. A patent claim characterized in that hot water is produced up to a set temperature using a heat pump type water heater, and when hot water is supplied, hydrogen is combined with a hydrogen storage alloy to supply hot water at a temperature higher than that of the hot water in the hot water storage tank. Water heater described in scope 1.