JPS5913854A - Hot water storage tank - Google Patents

Abstract

PURPOSE:To prevent the hot water at an upper layer from being also cooled by a coolant, decreased in temperature, in a jacket when it becomes coludy suddenly, by installing a heat exchanging jacket to the outer periphery of the hot water storage tank body of a solar heat system water heater. CONSTITUTION:In a hot water storage tank body 9, a heat exchanging jacket 11 is installed to a peripheral trunk part 9a except an upper section A and a lower section C both serving as a hot water collecting part, so that water in an intermediate tank B in the hot water storage tank 9 is heated by a heat transfer medium passing through the jacket 11. Thus, when it becomes cloudy suddenly, the heat transfer medium in the jacket 11 is sometimes reduced in temperature, but since the jacket is installed to the upper section A, hot water in the upper section A is maintained in a high temperature condition without being influenced by the heat transfer medium, reduced in temperature, in the jacket. Further, cold water gathers in the lower section C, and this prevents the occurrence of a loss due to mixture between hot water and cold water when hot water is supplied.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot water storage tank for an indirect solar water heater.

FIG. 1 shows a conventional indirect heating type solar water heater.

In the figure, 1 is a heat collector, 2 is a hot water storage tank, and hot water storage tank 2
The system has a heat exchanger 5 connected to a heat collector 1 via circulation pipes 3 and 4, and is kept at a temperature of .degree. A pump 6 and an expansion tank 7 are provided in the circulation pipes 3 and 4.

In the hot water storage tank 2 used in this manner, a jacket type one was proposed because the conventional coil type heat exchanger 5Vi is disadvantageous in terms of manufacturing. but,#! 2 As shown in figure 1
If the heat exchange jacket 8 is provided up to the top of the hot water storage tank body 2, the heat medium in the circulation path passing through the heat collector 1 will be trapped inside the hot water storage tank body 2 when it suddenly becomes cloudy or after a shower. When the hot water temperature becomes low, the hot water in the upper layer of the hot water storage tank body 2 is cooled down to make the hot water temperature uniform throughout the tank, which poses a problem in preventing high temperature hot water supply.

Therefore, an object of the present invention is to provide a heat exchange jacket type hot water storage tank that can supply hot water at a high temperature even when the weather suddenly changes.

An embodiment of this invention is shown in FIG. In the figure, reference numeral 9 denotes the main body of the hot water storage tank, which includes a circumferential body portion 9a and a pair of vessel-shaped end wall portions 9b welded to the top and bottom of this circumferential body portion 9a at seams 10.
, 9c, and is shaped like a rice bag. A heat exchange jacket 11 is provided on the circumferential body portion 9aK of the hot water storage tank body 9, except for the lower section A and the lower section C1r, which serve as hot water sampling sections. The heat exchange jack throat 11 has a heat medium inlet 12 at the top and a heat medium outlet 13 at the bottom.J!?
The hot tub body 9 has a water supply pipe 14 and a drain pipe 1 at the bottom.
5 is connected, and a hot water supply pipe 16 is connected to the upper part.

With this configuration, the water in the intermediate layer B in the hot water storage tank 9 is heated by the heat medium passing through the heat exchange jacket 11.

This heated hot water rises to the upper layer section A, and as the hot water storage time elapses, the heated hot water is stored up to the middle layer B. The water in the lower section C remains unheated. When hot water is tapped, hot water is given priority to the upper section A.

When it suddenly becomes cloudy or when there is a shower, the temperature of the heat medium in the heat exchange jacket 11 may drop, but since the upper section AKIfiK exchange jacket 11 is not provided, the hot water in the upper section A is heated. The high temperature is maintained without being affected by the decreased temperature of the heat medium inside the exchange jacket 11.

Therefore, high-temperature hot water supply is possible even when the weather suddenly changes.

In addition, since the lower section CK is not provided with a heat exchange jack 11, cold water accumulates in the lower section C.

Therefore, there is no mixing loss of hot water and supplied water when hot water is tapped, and the hot water taping characteristics are good as shown in Figure 4. In other words, high-temperature hot water can be supplied. In FIG. 4, the actual aP shows an example in which a heat exchanger jacket is provided up to the lower end of the hot water storage basin main body. In addition, since the hot water supply characteristic has a sharp curve as described above, high accuracy can be achieved by providing an @ degree detector and automatically stopping the hot water supply.

Further, the hot water storage tank body 9 is formed in the shape of a rice bag, which has the advantage that the hot water storage tank body 9 is easier to manufacture in terms of strength and the like, compared to a case in which it is formed in the shape of a drum. If the hot water storage tank body 9 is rice bag-shaped, it would be difficult to wrap the heat exchange jacket around the entire body, but in this embodiment, it is extremely easy to manufacture because it is wrapped only in the middle part of the straight cylinder. It is.

In this example, the heat exchange jacket 11 is provided except for the lower section C of the hot water tank body 9, and the heat exchange jacket 11 may be provided up to the lower section C. may be drum-shaped. Furthermore, the heat medium outlet 13 may be provided above the heat medium inlet 12fc of the heat exchange jacket 11 below.

As described above, in the hot water storage tank of the present invention, a heat exchange jacket is provided around the outer periphery of the hot water storage tank body except for the upper part, so that the temperature inside the heat exchange jacket does not drop when it suddenly becomes cloudy or at sunset. The hot water in the upper layer of the hot water storage tank body is not cooled down by the heating medium, and this has the advantage that hot water can be supplied at high temperatures even when the weather suddenly changes.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a solar water heater, Fig. 2 is a front view of a proposed example of a hot water storage tank, Fig. 3 is a front view of an embodiment of the present invention, and Fig. 4 is an explanatory diagram of ten hot water output characteristics. .

Claims (1)

[Scope of Claims] (υ A hot water storage tank comprising a hot water storage tank body and a heat exchange jacket provided on the outer periphery of the hot water storage tank body except for the upper part. (2) The heat exchange jacket is connected to the top and bottom of the hot water storage tank body. The hot water storage tank according to claim (1), which is provided only in the intermediate portion in the direction. (3) The hot water storage tank body is in the shape of a rice bag arranged vertically. Or the hot water tank described in paragraph (2).