JPS5947823B2 - Stratified heat storage tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stratified heat storage tank, and particularly to a stratified heat storage tank that stores hot water heated by a solar collector in an upper region and tap water in a lower region. The present invention relates to a stratified heat storage tank that has a temperature stratification effect to prevent hot water and cold water from mixing with each other.

A heat storage tank that is generally incorporated into a solar heat utilization system uses a solar heat collector to absorb the sun's thermal energy and introduce high-temperature hot water into the upper area of the tank through a hot water introduction pipe, and then to the solar heat collector. Low-temperature water such as tap water is introduced into the lower area through the tap water introduction pipe.

Therefore, since hot water with a temperature difference and cold water before heating coexist in the same heat storage tank, a decrease in the temperature of the hot water becomes a problem.

As a result, it is necessary to take measures to prevent the hot water in the upper layer from mixing with the hot water in the lower layer.

As an example of such a heat storage tank, a heat storage tank as shown in FIG. 1 has been conventionally used.The heat storage tank 1 has a cylindrical body 2 whose upper part is closed with an upper end plate 3, and the lower part of the body 2 is closed. It is closed by a lower end plate 4.

Therefore, inside the body 2, there are a plurality of partition plates 55...
5 are installed alternately in the horizontal direction at equal intervals in the vertical direction, and a meandering flow path as partially shown by the broken line is formed between them.

Hot water from the solar heat collector is supplied to the upper region of the tank through the hot water introduction pipe 6, while tap water is supplied to the lower region of the tank through the water ring water supply pipe 7, and is shown through the outlet pipe 8. is sent to the solar heat collector, which omits this.

Note that hot water is taken out through a hot water take-out pipe 9.

According to such a conventional heat storage tank, a large number of partition plates 5, 5
．． ..., the stratification effect due to the extrusion flow can be expected to some extent due to the meandering flow path formed between the sections 5 and 5, which can prevent the temperature of the hot water from dropping, but the structure requires that a large number of partition plates be installed alternately. The disadvantage was that it was complicated and the production cost increased.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a heat storage tank suitable for a solar heat utilization system, which eliminates the drawbacks of the conventional heat storage tank described above, and allows a stratification effect to be expected with a simple configuration.

In order to achieve the above object, the heat storage tank according to the present invention has a hot water chamber formed by installing an upper partition plate with a central opening in the upper part of the heat storage tank, and a central opening in the lower part of the heat storage tank. A cold water chamber is formed by constructing a lower partition plate, and an intermediate chamber is formed between the hot water chamber and the cold water chamber, and further intermediate partition plates are constructed on the intermediate chamber sides of the upper partition plate and the lower partition plate, respectively, A hot water conduit from the solar heat collector and a tap water supply pipe are connected to the hot water room and the cold water room so that the pipe axes at the tips thereof face in the circumferential direction of the body of the heat storage tank.

An embodiment of the heat storage tank according to the present invention is shown in FIGS. 2 and 3 below.
This will be explained with reference to the figures.

In FIG. 2, the heat storage tank, designated as a whole by reference numeral 11, has a cylindrical body 12 whose upper side is closed by an upper end plate 13 and whose lower side is closed by a lower end plate 14.

An upper partition plate 15 is installed near the upper end plate 13, and a hot water chamber 16 is formed between the upper partition plate 15 and the upper end plate 13.

On the other hand, a lower partition plate 17 is installed near the lower end plate 14, and a cold water chamber 18 is formed between it and the lower end plate 14.

Thus, an intermediate chamber 19 is formed between the upper and lower partition plates 15 and 17, and this intermediate chamber 19 and the hot water chamber 16 communicate through the central opening 15a of the upper partition plate 15,
On the other hand, the intermediate chamber 19 and the cold water chamber 18 communicate with each other through the central opening 17a of the lower partition plate 17.

An intermediate partition plate 20 is installed horizontally at a predetermined distance below the central opening 15a of the upper partition plate 15. It is supported by a partition plate 15.

On the other hand, an intermediate partition plate 22 is installed horizontally at a predetermined distance on the intermediate chamber side of the lower partition plate 17, and this intermediate partition plate 22 is supported by the lower partition plate 17 via stud bolts 23. ing.

A hot water introduction pipe 25 is incorporated into the hot water room 16 from the side, and this hot water introduction pipe 25 introduces hot water from a solar heat collector (not shown) into the hot water room 16. .

As clearly shown in FIG. 3, this hot water introduction pipe 25 is bent so that its tip 25a coincides with the circumferential direction of the body 12 of the heat storage tank. As shown in the figure, the directionality is given so that the fluid flows spirally in the circumferential direction within the barrel 12.

On the other hand, a tap water supply pipe 26 is incorporated into the cold water chamber 18 from the side, and this tap water supply pipe 26 is also connected to the hot water introduction pipe 2.
5, its tip is bent so as to coincide with the circumferential direction of the barrel 12.

Therefore, it is possible to give a swirling motion to the tap water supplied into the cold water chamber 18.

Furthermore, a cold water outlet pipe 27 is connected to one side of the cold water chamber 18 to send cold water to the solar collector, and a hot water outlet pipe 28 is connected to the same side of the hot water chamber 16. It is connected.

Since the heat storage tank according to the present invention is configured as described above, the high temperature hot water heated by the solar heat energy by the solar heat collector is passed through the hot water introduction pipe 25 to the hot water room 1.
6 will be introduced.

Since the tip 25a of the hot water introduction pipe 25 is bent so as to face in the circumferential direction inside the body 12, the hot water flows spirally from the outer circumference toward the inner circumference, as shown by the broken line in FIG. ,
It flows into the central opening 15a of the partition plate 15.

The temperature boundary line at this time is distributed as shown by the broken line in FIG. 2, and moves with the water flow.

Therefore, the flow velocity of the hot water flow flowing out of the central opening 15a is mostly reduced, and the temperature boundary line of the water flow in the area between the partition plate 15 and the partition plate 20 is as shown in FIG. The line is parallel to the plate 20.

In this way, the hot water flowing into the heat storage tank from the solar heat collector is given a swirling motion in the hot water chamber, and mixing with cold water in the lower region is avoided, making it possible to establish temperature stratification with a simple configuration.

In addition, when supplying hot water, the hot water chamber 16 is passed through the hot water outlet pipe 28.
Hot water inside is supplied.

Moreover, the tap water flowing into the cold water chamber 18 from the tap water supply pipe 26 flows through the central opening 18 while spiraling inside the cold water chamber 18.
a, and a similar temperature stratification effect is achieved by the partition plates 17 and 22.

As is clear from the above description, according to the present invention, an upper partition plate and a lower partition plate are provided near the upper and lower end plates of the heat storage tank to form a hot water chamber and a cold water chamber, and hot water and Since the cold water is caused to flow in with a swirling motion, it is possible to avoid mixing of the hot water and cold water above and below, thereby achieving a temperature stratification effect.

It goes without saying that the heat storage tank according to the present invention can be widely applied to general heat storage tanks other than hot water systems utilizing solar heat.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram diagrammatically showing an example of a conventional heat storage tank,
FIG. 2 is a longitudinal cross-sectional view showing an embodiment of the stratified heat storage tank according to the present invention, and FIG. 3 is a cross-sectional view taken along the line l[-■ in FIG. 2. 11... Heat storage tank, 12... Body, 13.
... Upper end plate, 14 ... Lower end plate, 15
... Upper partition plate, 16 ... Hot water room, 1
7...Lower partition plate, 18...Cold water chamber,
19...Intermediate chamber, 20.22...Intermediate partition plate, 25...Hot water introduction pipe, 26...
・Tap water supply pipe.

Claims (1)

[Claims] 1. An upper partition plate with a central opening is installed in the upper part of the heat storage tank to form a hot water chamber, while a lower partition plate with a central opening is installed in the lower part of the heat storage tank to form a cold water chamber. An intermediate room is formed between the hot water room and the cold water room, and intermediate partition plates are installed on the intermediate room sides of the upper and lower partition plates, respectively, and the hot water room and the cold water room are equipped with a solar heat collector. A stratified heat storage tank characterized in that a hot water conduit and a tap water supply pipe are connected such that the pipe axis at the tip faces in the circumferential direction of the body of the heat storage tank.