JPH0413568Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an instant hot water supply device that is devised so that hot water comes out immediately after the tap is opened.

[Prior Art] In a water heater that uses an instantaneous water heater or a hot water storage type water heater, if there is a long piping between the water heater and the hot water tap, if the tap is closed and then opened after a period of time, Since the hot water in the long piping cools down and flows out first, there is a problem that hot water cannot be obtained immediately when the tap is opened.

Therefore, as shown in Fig. 4, a hot water pot 3 that can be heated by an electric heating means 4 is installed in the piping 5 of the water heater 1 and the hot water tap 2, and when the tap is opened, the hot water in the hot water pot 3 is first drained. There is a contrivance that the hot water is discharged, and the cold water in the pipe 5 is mixed with the hot water in the hot water pot 3 before being discharged.

[Problems with the Prior Art] However, in the above-mentioned known example, it is necessary to keep the electric heating means 4 in the hot water pot 3 powered on at all times, which is not preferable from the viewpoint of energy saving. Furthermore, instead of installing the hot water pot 3 as described above, there is a method in which the hot water from the water heater 1 is constantly circulated in the piping 5, but in this case, the equipment related to the circulation piping is This increases costs and running costs, and is also disadvantageous in terms of energy conservation.

Furthermore, JP-A-60-8648 discloses a hydrogen storage alloy with different temperature and pressure characteristics and two sealed containers in which hydrogen is stored; one container is installed above the hot water storage tank, and the other is placed in the hot water storage tank. Installed outside the tank and communicating with the two containers, the water heater first generates hot water to a set temperature, and when hot water is supplied, the hydrogen storage alloy and hydrogen are combined to supply hot water at a higher temperature than the hot water in the hot water storage tank. A water heater configured as follows has been proposed.

However, in the case of this known example, since it has two containers and the devolatilization and occlusion functions are performed between these two containers, the structure becomes complicated.
There is a problem that as the size increases, the efficiency decreases.

The purpose of this invention is to propose an instant hot water supply device using a hydrogen storage alloy that is compact and exhibits high performance.

[Means to solve the problem] The configuration of the present invention is as follows.

A hydrogen storage alloy filling chamber filled with a hydrogen storage alloy into which a hydrogen adsorption/extraction pipe is inserted is formed in the center, and a hot water storage chamber is formed with a partition wall surrounding this filling chamber, and a hot water storage chamber is formed to further surround this hot water storage chamber. A hydrogen storage chamber is formed in the hydrogen storage alloy filling chamber, a hydrogen absorption and desorption pipe having a large number of small holes is inserted into the center of the hydrogen storage alloy filling chamber, and this and the hydrogen storage chamber are communicated with each other through a communication pipe. A hot water storage pot equipped with a regulating valve is connected to the hot water storage chamber, and the end of a hot water pipe connecting the water heater and the faucet is connected to the hot water storage chamber, and the faucet is brought as close as possible to the hot water storage chamber through the hot water outlet pipe. An instant hot water supply device that is connected.

[Function] In the above-mentioned instant hot water supply device, when the hot water tap is turned off and the hot water temperature in the piping system and hot water storage chamber begins to decrease due to natural heat radiation, the temperature and pressure in the hydrogen storage alloy filling chamber decrease, and these decreases. Hydrogen corresponding to the amount of water is introduced from the hydrogen storage chamber into the hydrogen storage alloy filling chamber through the communication pipe and the hydrogen absorption/extraction pipe, and this is stored in the hydrogen storage alloy to cause an exothermic reaction, and this reaction heat increases the temperature of the hot water in the hot water storage chamber. Deterioration is prevented. As a result, as soon as the tap is opened, the hot water in the hot water storage chamber comes out, and the cold water in the piping mixes with the hot water in the hot water storage room, and the hot water comes out. Then, when high-temperature water from the water heater side passes through the piping and the hot water storage chamber, devolatilization (endothermic reaction) of hydrogen occurs, and the hydrogen returns to the hydrogen storage chamber in a pressurized state via the communication pipe.

[Example] Fig. 1 shows an example of the instant hot water supply device according to the present invention. 1 is a water heater, and this water heater 1 is an instantaneous heating type using gas as fuel. Reference numeral 2 denotes a hot water outlet tap for discharging hot water heated by the water heater 1 via a pipe 5 and a hot water outlet pipe 5'.

Reference numeral 6 denotes a hot water storage pot installed between the piping 5 and the hot water outlet pipe 5', and as shown in FIG. A hot water storage chamber 8 is formed around the filling chamber 7 via a partition wall 8', and a hydrogen storage chamber 9 (geometric volume 11.3 l) is further formed around this hot water storage chamber 8. The hydrogen absorption and desorption pipe 13 with a small hole 14 inserted into the center of the alloy filling chamber 7 is a communication pipe 10 with a needle valve (adjustment valve) 11.
It is communicated at.

Reference numeral 12 indicates a hydrogen storage alloy (LaNi ₅ ) filled in the hydrogen storage alloy filling chamber 7, and the amount thereof is 0.5 kg.

Note that the hydrogen storage alloy filling chamber 7 and the hydrogen storage chamber 9
The internal pressure is set to 10Kg/cm ² G at 66°C.

Next, the operation of the above embodiment will be explained.

When the water heater 1 is operated and hot water of 66°C is supplied from the hot water storage chamber 8 of the hot water storage pot 6 via the piping 5 to the hot water tap 2 via the hot water tap 5', the hydrogen storage alloy filling chamber 7 and hydrogen The pressure inside the reservoir chamber 9 is 10Kg/cm ² G. When the hot water tap 2 is closed in this state, the temperature of the 66°C hot water in the piping 5, the hot water tap pipe 5', and the hot water storage chamber 8 decreases due to natural heat radiation, and as a result, the hydrogen storage alloy 12 is cooled and the hydrogen storage alloy The temperature and pressure inside the filling chamber 7 decrease. As a result, hydrogen is sucked from inside the hydrogen storage chamber 9 via the communication pipe 10, and this hydrogen is absorbed into the small hole 1 of the hydrogen absorption and extraction pipe 13.
4 is stored in the hydrogen storage alloy 12, and at this time heat is generated. This heat generation warms the hot water in the hot water storage chamber 8 and suppresses a drop in its temperature.

Fig. 3 shows the temperature change in the instant hot water supply device implementing the present invention, and shows that when the pressure in the hydrogen storage chamber 9 reaches 10 kg/cm ² G, the needle valve 11 of the communication pipe 10 is closed. The water temperature decreases as shown by the dotted line in the figure. Then, when the temperature reaches 50°C, the needle valve 11 is opened and hydrogen is supplied to the hydrogen storage alloy filling chamber 7 while maintaining the temperature at 50°C. After the tap 2 is closed, the temperature is maintained at 50°C for 2 hours and 30 minutes. can do.

The dashed-dotted line in the figure shows the case where the needle valve 11 is operated while maintaining the water temperature at 40°C in the same way as above.
In this case, the temperature can be maintained at 40°C for 4 hours and 30 minutes.

Furthermore, the two-dot chain line in the figure shows the case where the needle valve 11 is operated while the water temperature is maintained at 35° C. in the same manner as above, and in this case, the temperature can be maintained at 35° C. for 7 hours.

Note that the solid line in the figure is an example of only heat retention.

In any of the above cases, by fully opening the needle valve 11 and flowing hot water at 65°C, the hydrogen storage chamber 9
The internal pressure returned to its initial state of 10 kg/cm ² G.

[Effects of the present invention] As described above, the present invention attaches a hydrogen storage alloy filling chamber filled with hydrogen storage alloy to the hot water storage pot attached to a part of the hot water supply piping, thereby reducing the temperature of hot water in the hot water storage pot. Then, heat is generated due to the occlusion effect, and the temperature of the hot water is maintained by this heat generation, so that an energy-saving instant hot water supply device can be obtained without any running costs.

In addition, the device is simple, and the hot water storage pot has a hydrogen storage alloy filling chamber formed in the center, and a hot water storage chamber and a hydrogen storage chamber outside this, so it can be made smaller.

Furthermore, hydrogen enters the hydrogen storage alloy filling chamber through a hydrogen adsorption/desorption pipe with many small holes, is stored, and is desorbed, resulting in high efficiency. It is separated by partition walls, and heat is transferred from the entire surrounding area, so heat transfer efficiency is good.

Next, in the present invention, the temperature holding time can be freely adjusted by adjusting the amount of hydrogen movement using the adjustment valve.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the instant hot water supply device according to the present invention, Fig. 2 is a sectional view of the hydrogen storage alloy filling chamber, Fig. 3 is an explanatory diagram of the operation, and Fig. 4 is an explanatory diagram of the conventional instant hot water supply device. be. 1... Water heater, 2... Hot water tap, 3... Hot water pot, 4... Electric heating means, 5... Piping, 6... Hot water storage pot, 7... Hydrogen storage alloy filling chamber, 8... Hot water storage room , 9...Hydrogen storage chamber, 10...Communication pipe, 11...
...Needle valve, 12...Hydrogen storage alloy.

Claims (1)

[Scope of Claim for Utility Model Registration] A hydrogen storage alloy filling chamber filled with a hydrogen storage alloy is formed in the center, a hot water storage chamber is formed with a partition wall surrounding this filling chamber, and the hot water storage chamber is further surrounded. A hydrogen storage chamber is formed as shown in FIG. A hot water storage pot with a regulating valve attached to the pipe is provided, the end of the hot water pipe connecting the water heater and the faucet is connected to the hot water storage chamber of the hot water storage pot, and the hot water tap is brought as close as possible to the hot water storage chamber. An instant hot water supply system that is connected via a hot water outlet pipe.