JPH0419473B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention forms a circumferential wall of a water tank with a double wall to form a flow path for a heat medium on the circumferential surface of the water tank, and an inlet for the heat medium communicating with this flow path. The present invention relates to a heat exchange type hot water storage tank which is formed in an upper part, and has an outlet paired with the inlet in a lower part and in a middle position between the upper part and the lower part.

[Background Art] As shown in FIG. 1, the circumferential wall 32 of a water tank 31 is formed with a double wall 33 and a heat collector equipped with a flow path for a heat medium to flow, and a heat medium flow path 34 is formed on the circumferential surface of the water tank 31. A heat exchanger in which a heat medium inlet 35 communicating with the flow path 34 is formed in the upper part, and an outlet 36 paired with the inlet 35 is formed in the lower part and in the middle position between the upper part and the lower part. In a solar hot water storage device that heats the water in the water tank 31 of the heat exchange type hot water storage tank 37 while the heat medium circulates between the type hot water storage tanks 37, when the heat medium is circulated from the middle outlet 36 to the heat collector, Although the amount of hot water stored is small, high-temperature hot water can be stored in a short time, and when the heating medium is circulated from the lower outlet 36 to the heat collector, a large amount of hot water can be stored although it takes a long time. It has a high practical effect in that hot water can be supplied at the same time.

By the way, in this configuration, the heat medium is transferred to the intermediate outlet 36.
When the heat medium is circulated from the top to the heat collector, as shown in the figure, the heat medium flows from the upper heat medium inlet 35 and flows down the heat medium flow path 34 of the heat exchange type hot water storage tank 37 from the middle outlet 36. As it moves away from the water, it flows down below this intermediate outlet 36, so the water above this outlet 36 is not sufficiently heated and cannot store hot water at a high temperature, reducing its functionality from a practical standpoint.

[Object of the invention] This invention was made in view of the above circumstances, and the peripheral wall of the water tank is formed with a double wall to form a heat medium flow path on the peripheral surface of the water tank, and the heat medium communicating with this flow path is The practical value of the heat exchange type hot water storage tank is increased, and the inlet for the medium is formed in the upper part, and the outlet paired with this inlet is formed in the lower part and in the middle position between the upper part and the lower part. Specifically, the present invention provides a heat exchange type hot water storage tank that can store water above the middle outlet for a shorter time or at a higher temperature.

[Disclosure of the Invention] That is, the peripheral wall of the water tank of the present invention is formed with a double wall, a flow path for the heat medium is formed in the peripheral wall of the water tank, and an inlet for the heat medium communicating with this flow path is formed in the upper part. In a heat exchange hot water storage tank in which an outlet paired with an inlet is formed at a lower level and at an intermediate position between the upper and lower outlets, a heating medium is supplied to the flow path all around the circumference immediately below the intermediate outlet. To provide a heat exchange type hot water storage tank characterized in that a restriction is formed to promote the flow of water to a medium outlet.

Hereinafter, the present invention will be explained based on the drawings of the embodiments. FIG. 2 is a sectional view of a main part of a heat exchange type hot water storage tank according to an embodiment of the present invention, and FIGS. 3, 4, and 5 are sectional views of main parts according to other embodiments of the invention.
In FIG. 2, 1 is a water tank. This water tank 1 consists of a cylindrical circumferential body part 2 constituting a peripheral wall, an upwardly convex spherical plate ceiling 3 connected to the upper end of the circumferential body part 2, and the circumferential body part 2.
It consists of a downwardly convex spherical plate bottom plate 4 connected to the lower end of the plate. The circumferential body portion 2 constituting the circumferential wall of the water tank 1 is formed of a double wall 5, and a cylindrical flow path 6 through which a heat medium flows is formed on the circumferential surface of the water tank 1. An inlet 7 into which the heat medium flows is formed above the flow path 6, and an outlet 8 paired with the inlet 7.
a, 8b are formed in the lower part and in the middle between the outlet 8a in this lower part and the inlet 7.

Here, as the heating medium, a known substance as a heating medium such as propylene glycol is used, for example.

A feature of the present invention is that a restrictor 9 is formed around the entire circumference of the flow path 6 directly below the intermediate outlet 8b. This throttle 9 may be formed, for example, by providing a convex strip 11 on the outer wall 10 of the double wall 5 with respect to the flow path 6, or as shown in FIG. It may be formed by providing a protruding strip 11 for the channel 6, or it may be formed by passing a wire 13 around the outer wall 10 as shown in FIG. It may also be formed by providing a protrusion 11. In other words, the heating medium inlet 7 provided above
The heat medium flowing from the water tank 1 heats the water in the water tank 1 while flowing down the flow path 6, and returns to the heat source from the outlets 8a and 8b. In this case, the water to be heated is placed at the medium outlet 8b.
In the case where the heating medium is limited to above, a restriction 9 is formed just below this intermediate outlet 8b, so this restriction 9 promotes the flow of the heat medium to the intermediate outlet and flows down below this restriction 9. Therefore, the amount of heat exchange increases and hot water can be stored at a high temperature. This is particularly noticeable in areas far from the exit 8b.

Note that the heat source for heating the heat medium used in this invention is not limited to solar heat. Either thermal baking, electric heating, etc. may be used.

[Effects of the Invention] As described above, in the present invention, when heat exchange is performed only above the intermediate outlet, the amount of heat exchange increases and hot water can be stored at a high temperature.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional example of the present invention, FIG. 2 is a sectional view of a main part of a heat exchange type hot water storage tank according to an embodiment of the invention, and FIGS. 3, 4, and 5 are sectional views of the present invention. FIG. 3 is a cross-sectional view of main parts according to another embodiment of the present invention. 1... Water tank, 5... Double wall, 6... Channel, 7...
...Inlet, 8a, 8b...Outlet, 9...Aperture.

Claims (1)

[Scope of Claims] 1. The circumferential wall of the water tank is formed with a double wall to form a heat medium flow path on the circumferential surface of the water tank, and an inlet for the heat medium communicating with this flow path is formed in the upper part. In a heat exchange type hot water storage tank, in which a pair of outlets are formed in a lower part and a middle part between the upper part and the lower part, a heat medium A heat exchange type hot water storage tank characterized by forming a restriction that promotes the flow of water to a medium outlet. 2. The heat exchange type hot water storage tank according to claim 1, wherein the throttle is formed by providing a convex strip on the outer wall of the double wall with respect to the flow path. 3. The heat exchange type hot water storage tank according to claim 1, wherein the throttle is formed by providing a convex strip on the inner wall of the double wall with respect to the flow path.