JPS6337643Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a solar water heater equipped with a heat collecting section and a hot water storage tank disposed in an inclined state above the heat collecting section. be.

Conventional configuration and its problems A conventional solar water heater was configured as shown in Figure 1. That is, in this Figure 1, 1
1 is a hot water storage tank, and a water supply pipe 3 having a ball tap 2 is attached to the upper side wall of this hot water storage tank 1. Reference numeral 4 denotes a water guide pipe located below the water supply pipe 3 and arranged in the hot water storage tank 1, and this water guide pipe 4 guides water supplied from the water supply pipe 3 to the lower side of the hot water storage tank 1. Reference numeral 5 denotes a heat collecting section, and this heat collecting section 5 is connected to the hot water storage tank 1 through an outgoing pipe 6 and a return pipe 7.
Reference numeral 8 denotes a hot water outlet provided at the bottom of the side wall opposite to the side wall to which the water supply pipe 3 of the hot water storage tank 1 is attached;
One end of a molten metal guide pipe 10 having a bendable bellows part 9 is attached to the molten metal guide pipe 10, a float 11 is attached to the other end of the molten metal guide pipe 10, and the opening at the other end is used as a molten metal inlet 12.

In the above-mentioned conventional configuration, to explain its operation, water supplied from the water supply pipe 3 into the hot water storage tank 1 is guided into the heat collecting part 5 via the outgoing pipe 6, and the water is transferred to the heat collecting part 5. The hot water is heated by solar heat and enters the hot water storage tank 1 through the return pipe 7, and is stored sequentially from the upper part of the hot water storage tank 1. This hot water is then transferred from the hot water intake port 12 to the hot water pipe 1.
0 and taken out from the outlet 8. In this case, since the hot water pipe 10 has a bendable bellows part 9 and a float 11 is attached,
When the water level in the hot water storage tank 1 decreases due to hot water being taken out, the hot water supply pipe 10 also descends accordingly. Therefore, by providing such a movable hot water supply pipe 10, Regardless of the amount of hot water supply flow rate, the hot water supply pipe 10 can always be positioned below the water surface, so that the air trapping phenomenon that occurs due to the relationship between hot water supply flow rate and water supply capacity can be prevented.

FIG. 2 shows an enlarged view of 10 parts of the conventional molten metal pipe 10. The molten metal pipe 10 is made of synthetic resin and has a flexible bellows part 9 made of a rubber material and a float 11 attached. To install it, first, one end of the bellows part 9 is fixed to the outlet 8 attached to the lower side wall of the hot water storage tank with a hose band 14, and then the other end of the bellows part 9 is fixed to the outlet 8 attached to the lower side wall of the hot water tank. The hot water guide pipe 10 is attached by fixing the straight pipe portion 13 with a hose band 15. However, in this hot water supply pipe 10, the bendable bellows part 9 is made of a rubber material, and the straight pipe part 13 is made of synthetic resin, so these bellows part 9 and the straight pipe part 13 are not connected to the hot water storage tank 1. Due to the influence of the hot water temperature, variations occur in their flexibility, and due to this variation, the distance from the hot water sampling port 12 to the water surface changes, and depending on the hot water supply flow rate, an air trapping phenomenon occurs. There was a problem that this occurred.

Purpose of the invention In view of the above-mentioned conventional problems, the present invention has been developed so that even if the synthetic resin constituting the float type hot water pipe is affected by the temperature of hot water in the hot water storage tank and its flexibility varies, it can be used. It is an object of the present invention to provide a solar water heater that can always maintain a predetermined distance from a sprue to the water surface.

Structure of the invention In order to achieve the above object, the present invention has developed a float-type lead pipe made of synthetic resin, which has one end connected to a hot water outlet provided at the lower part of the side wall of a hot water storage tank, and a float and a hot water intake port provided at the other end. The float-type molten metal pipe is equipped with a molten metal pipe, and a weight is attached to the other end of the float-type molten metal pipe, positioned at the tip of the float. According to this configuration, the synthetic resin that makes up the float-type molten metal pipe Even if the flexibility of the water varies due to the temperature of the water in the storage tank, and the distance from the water intake to the water surface changes due to the buoyancy of the float,
Since the weight has the effect of suppressing the buoyancy of the float, it is possible to always maintain a predetermined distance from the well opening to the water surface, which is an excellent feature that eliminates the occurrence of air trapping. It is effective.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 3 shows a side sectional view of a heat pipe type solar water heater in an embodiment of the present invention,
In addition, FIG. 4 shows a cross-sectional view taken along line A-A' in FIG.
23 is a hot water storage tank which is arranged in an inclined state above the heat collection part 21, and a plurality of hot water storage tanks 23 are installed at the lowest part of the hot water storage tank 23. A condensing section 22b of a heat pipe 22 is provided. 24 is a water supply pipe attached to the upper side wall of the hot water storage tank 23, and has a ball tap 25.
Reference numeral 26 denotes a water guide pipe located below the water supply pipe 24 and disposed within the hot water storage tank 23. This water guide pipe 26 guides water supplied from the water supply pipe 24 to the lower side of the hot water storage tank 23. 27 is the water supply pipe 24 of the hot water storage tank 23
This outlet 27 is provided at the lower part of the side wall opposite to the side wall to which the heat pipe 27 is attached, and the outlet 27 is provided at approximately the same height as the condensing part 22b of the heat pipe 22. Reference numeral 28 denotes a float-type molten metal guide pipe having one end 28a connected to the outlet 27 and a float 29 attached to the other end 28b.
A plurality of thick straight pipe portions 30 made of synthetic resin such as polyethylene and flexible bellows portions 31 which are thin and have an outer diameter larger than the outer diameter of the straight pipe portions 30 are alternately formed. Also, the other end 28 of the float-type hot water guide pipe 28 located above the hot water outlet 27
A sprue inlet 32 is provided on the upper surface of b.

5a, b, and c show the mounting structure of the float 29 and the like at the other end 28b of the float type molten metal guide pipe 28. It is attached to the tip end side of the sprue 32, and a metal weight 33 is attached to the tip end side of the float 29. The weight 33 is attached by integrally forming a protrusion 34 on the other end 28b of the float-type hot water pipe 28, and on the other hand, providing a recess 35 corresponding to the protrusion 34 on the inner peripheral surface of the ring-shaped weight 33. Furthermore, there is a gap between the recess 35 and the protrusion 34 as shown in FIG.
In this state, the weight 33 is attached to the other end 28b of the float-type hot water pipe
By forcibly pushing the weight 33 over the synthetic resin protrusion 34, the weight 33 is attached as shown in FIG. 5a. In this attached state, the weight 33 is prevented from coming off due to the dimensional difference A between the recess 35 and the protrusion 34.

The operation in the above configuration will be explained. Water supply pipe 24
The water supplied into the hot water storage tank 23 undergoes heat exchange in the condensing section 22b of the heat pipe 22 and becomes hot water.
Then, this hot water is taken into the float-type hot water pipe 28 from the hot water intake port 32 and taken out from the hot water outlet 27. In this case, the float-type hot water pipe 28 has a bendable bellows part 31 and a float 29 is attached, so that when a large amount of hot water is stored in the hot water storage tank 23, as shown by the dotted line in FIG. As shown in FIG.
As the water level inside the tank falls, the float type hot water pipe 28 gradually falls as shown by the solid line in Fig. 4.
By adopting this, the float-type hot water supply pipe 28 can always be positioned below the water surface regardless of the amount of hot water supply flow rate, thereby eliminating the air trapping phenomenon that occurs due to the relationship between hot water supply flow rate and water supply capacity.

During the above operation process, when the temperature of the hot water in the hot water tank 23 increases, the float type hot water pipe 28 made of synthetic resin is affected by the hot water temperature.
Variation occurs in the flexibility, and due to this variation, the distance from the water sampling port 32 to the water surface tends to change. In this case, the weight 33 acts to suppress the buoyancy of the float 29, A predetermined distance can always be maintained from the sprue 32 to the water surface.

In the above-mentioned embodiment, the float-type hot water pipe of the present invention is applied to a heat pipe type solar water heater, but it can also be applied to a natural circulation type solar water heater.

Effects of the invention As described above, according to the invention, the synthetic resin constituting the float type hot water pipe is affected by the temperature of the water in the hot water storage tank, causing variations in its flexibility, and due to the buoyancy of the float. Even if the distance from the water intake port to the water surface changes, the weight attached to the other end of the float-type molten metal pipe, positioned closer to the tip than the float, acts to suppress the buoyancy of the float. It is possible to always maintain a predetermined distance from the sprue to the water surface, and as a result, the excellent effect of eliminating the occurrence of air entrapment phenomenon is achieved.

[Brief explanation of drawings]

Figure 1 is a configuration diagram showing a part of a conventional solar water heater in cross section, Figure 2 is an enlarged vertical cross-sectional view of the hot water pipe section of the water heater, and Figure 3 is a diagram showing a part of the water heater according to the present invention. A side sectional view of a heat pipe type solar water heater showing an example,
Figure 4 is a sectional view taken along the line A-A' in Figure 3, and Figure 5 shows the configuration of the other end of the float-type hot water pipe in the same water heater. A side view, c is a sectional view showing the mounting structure of the weight. 21... Heat collection part, 23... Hot water storage tank, 27... Hot water outlet, 28... Float type hot water guide pipe, 28a... End, 28b... Other end, 29... Float, 32
...Hot water intake, 33...Weight.

Claims (1)

[Scope of utility model registration request] a heat collecting section, a hot water storage tank disposed in an inclined state above the heat collecting section, a hot water outlet provided at a lower part of a side wall of the hot water storage tank, and one end connected to the hot water outlet, and a synthetic resin float-type molten metal pipe with a float and a molten metal inlet at the other end,
A solar water heater in which a weight is attached to the other end of the float-type hot water pipe at a position closer to the tip than the float.