JPS5914696B2 - solar water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar water heater, in which a hot water outlet 2 is provided at the bottom of a hot water storage tank 1, one end of a flexible hose 3 placed inside the hot water storage tank 1 is connected to the hot water outlet 2, and the hot water outlet This solar water heater is characterized in that a low-temperature hot water inflow part 5 that constantly communicates with the water outlet 2 is provided at the connection part between the water outlet 2 and the flexible hose 3, and a float 4 is provided on the flexible hose 3.

Solar water heaters (particularly natural circulation type) have been known for some time that can provide both lot hot water supply and overflow hot water supply. However, in this conventional example, in the case of lot hot water supply, low-temperature hot water from the lower part of the hot water storage tank is initially supplied, and the hot water starts to be cold. Shi・to (
・There were 5 problems.

The present invention was invented in view of the above points, and its basic purpose is to ensure that the hot water at the beginning of the hot water supply is not cold even when hot water is dispensed in batches. In addition to this purpose, it is also intended to make the temperature of hot water uniform from the beginning to the end of hot water supply in the case of lot hot water supply.

The present invention will be explained in detail below with reference to Examples.

In the figure, A is a solar water heater, 6 is a heat collecting part, 7 is a part of the upper cover, and inside this upper cover part 7 is a hot water storage tank 1.
There is no interior decoration.

8 is a water supply cylinder communicating with the lower part of the hot water storage tank 1;
Ball tap 90 balls 1 on the water surface at the top of the water supply cylinder part 8
0 is floating, and the valve of the ball tap 9 is opened and closed by the top and bottom of the ball 10 to supply water to the water supply cylinder part 8 or to stop the water supply.

The hot water storage tank 1 and the heat collecting section 6 communicate with each other, and the hot water heated by the heat collecting section 6 at a temperature of .degree. C. is stored in the hot water storage tank 1.

A hot water outlet 2 is provided at the bottom of the hot water storage tank 1, and one end of a flexible hose 3 inserted into the hot water storage tank 1 is connected to the hot water outlet 2.
A low-temperature hot water inlet 5 is provided at the connection portion between the hot water outlet 2 and the flexible hose 3 and communicates with the hot water outlet 2.
A float 4 is provided near the other end of the flexible hose 3.

Here, one end of the flexible hose 3 is connected to the hot water outlet 2, and the low temperature hot water inflow section 5 is provided at this connection part, for example, as follows.

That is, as shown in FIG. 3, the drain port 2 is cylindrical, an insertion cylinder part 14 is provided at one end of the flexible hose 3, and fin-like pieces 15 are radially projected from the outer circumference of the insertion cylinder part 14.
Insert the insertion cylinder part 14 into the cylindrical outlet 2 and insert the fin-like piece 15.
The flexible hose 3 is connected to the hot water outlet 2 by pressing it against the inner surface of the insertion tube 14, and the gap between the inner surface of the cylindrical hot water outlet 2 and the outer surface of the insertion tube 14 is connected to the low temperature hot water inlet 5.
That is.

In the figure, 11 is a pipe, 12 is a roof, and 13 is a ridge.

Next, FIG. 4 shows another embodiment, in which a double cylinder part consisting of an outer cylinder 16 and an inner cylinder 17 is integrally formed at one end of the flexible hose 3, and the outer cylinder 16 is connected to the hot water storage tank 1. It is attached to a hole 18 provided with a nut 20 through a packing 19, with the outer cylinder 16 serving as the outlet 2 and the gap between the outer cylinder 16 and the inner cylinder 17 serving as the low-temperature hot water inlet 5. It is something that can be done.

In the figure, reference numeral 26 denotes a connecting piece that integrally connects the outer cylinder 16 and the inner cylinder 17.

Another embodiment is shown in FIG. 5, in which the cylinder constituting the drain port 2 is placed in the hot water storage tank 1 in two prongs at ℃ and ℃.
The flexible hose 3 is connected to one of the two prongs, and the other of the two prongs becomes the low temperature hot water inflow part 5.

In addition, in FIG. 6, the cylinder constituting the hot water outlet 2 has two prongs, which are joined together outside the hot water storage tank 1, and a flexible hose 3 is attached to one of the two pronged parts located inside the hot water storage tank 1. and the other side is used as the low temperature hot water inflow section 5.

However, in the case of lot hot water supply, when the hot water outlet 2 draws hot water, high temperature hot water just below the water surface flows from the tip of the flexible hose 3 to the hot water outlet 2, and low temperature hot water from the lower part of the hot water storage tank 1 flows from the low temperature hot water inlet 5. The high-temperature hot water and low-temperature hot water are mixed at the hot water outlet 2, and this mixed hot water is supplied as hot water.

Therefore, even if hot water is drawn in lots, first the hot water storage tank 1 is
Only the low-temperature hot water at the bottom of the tank will flow, and the initial water temperature will be low (there is no risk of heating up if it is too low).

Moreover, for example, if the distribution of hot water temperature in the hot water storage tank 1 is ℃ in the upper and lower parts as shown in Fig. 7, then when hot water is taken out sequentially from below the water surface and from the bottom, a + (a + 5) a + 1 + (a-(c=
A + 2.5°C, □ 2 a + 2 + (a + 3) = a + 2.5°C, □ = a + 2.5°C, so hot water can always be drawn at a uniform temperature.

By the way, when installing the float 4 on the flexible hose 3, it is also possible to attach a separate float 4 near the tip of the flexible hose 3 with a fixing pin 21.
As shown in Fig. 5, the flexible hose 3 itself may be made of synthetic resin or synthetic resin foam, which has a specific gravity lower than that of water.

Of course, the flexible hose 3 of the first invention may be made of synthetic resin or synthetic resin foam having a specific gravity lower than that of water.

In addition, FIG. 8 shows an example of a water supply cylinder part 801, and the upper part of the water supply cylinder part 8 is a water channel through which the ball 10 moves.
As shown in FIG. 9, this waterway 22 has a circular cross-section, approximately equal to the diameter of the ball 10, and vertically the same as the movement trajectory of the ball 10 attached to the tip of a shaft 23 pivoted to the ball tap 9. It is inclined in a circular arc, and furthermore, a recess 24 is provided in a part of the waterway 22 so that the shaft 23 can move up and down.

When the hot water in the water storage tank 1 is taken to the outside, water is automatically supplied by the ball tap 9. In this case, the ball 10 moves up and down along the water channel 22 and the shaft 23
moves up and down within the recess 24.

By moving the ball 10 up and down in the water channel 22 in this way, the gap between the water channel 22 and the ball 10 is reduced, and as a result, the contact between the air layer 25 above the water supply cylinder section 8 and the hot water surface of the water supply cylinder section 8 is reduced. This reduces heat radiation.

This means that when covering the hot water storage tank 1 and the water supply cylinder part 8 with a heat insulating material, the heat insulation is not sufficient at the attachment part of the ball tap 9 to the water supply cylinder part 8, and the hot water surface of the water supply cylinder part 8 and Although heat dissipation due to contact with the air layer 25 poses a problem, this problem can be solved.

Further, by making the water channel 22 arc-shaped, it can sufficiently cope with fluctuations in water supply pressure, and the shaft 23 also moves up and down within the recess 24, so there is no problem in vertical movement.

As described above, in the present invention, one end of the flexible hose placed in the hot water storage tank is connected to the hot water outlet, and the flexible hose is provided with a float, so the tip of the flexible hose is positioned near the hot water surface. However, there is an advantage that hot water can be taken out at a high temperature when taken out from the outlet.

In addition, the hot water outlet is provided at the bottom of the hot water storage tank, and the connection part between the hot water outlet and the flexible hose is provided with a low-temperature hot water inlet that is always in communication with the hot water outlet, so the hot water taken out from the hot water outlet is always at a high temperature just below the water surface. This has the advantage that the mixed hot water can be taken out, and the temperature of the hot water to be sampled can always be kept constant.

[Brief explanation of drawings]

Figure 1 is a perspective view of the construction state of the present invention, Figure 2 is a schematic explanatory diagram of the present invention, Figure 3 is an explanatory diagram of the same before connecting the drain port and the flexible tube, and Figures 4 a and b are 5 is a schematic explanatory diagram of another embodiment of the same as the above, FIG. 6 is a schematic explanatory diagram of still another embodiment of the same as the above, Figure 7 is an explanatory diagram showing the hot water temperature distribution in the same hot water storage tank as above, Figure 8 is a cross-sectional view of an embodiment of the water supply cylinder portion of the same as above, and Figure 9 is a cross-sectional view taken along line X-X in Figure 8. 1 is a hot water storage tank, 2 is a hot water outlet, 3 is a flexible hose, 4 is a float, and 5 is a low temperature hot water inlet.

Claims (1)

[Claims] 1. A hot water outlet is provided at the bottom of the hot water storage tank, one end of a flexible hose placed inside the hot water storage tank is connected to the hot water outlet, and a low-temperature hot water inlet is provided at the connection part between the hot water outlet and the flexible hose to constantly communicate with the hot water outlet. 1. A solar water heater comprising a flexible hose and a float.