JPS6325455Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) The present invention heats hot water in the hot water storage tank by disposing a heat exchanger around the outer periphery of the hot water storage tank, and is equipped with an expansion tank for a heat medium flowing inside the heat exchanger. Regarding the structure of hot water storage tanks.

(Background Art) A hot water supply system as shown in FIG. 1 has been known. In FIG. 1, reference numeral 1 denotes a hot water storage tank, and an outer cylinder 5 is provided around the outer periphery of the hot water storage tank 1 to form a jacket-type heat exchanger 2. The heat exchanger 2 and a heat source such as a collector 6 or a boiler 7 are connected by a heat medium pipe 8, and the heat medium pipe 8 is provided with an expansion tank 3. Here, the expansion tank 3 also has the role of storing a reserve amount of heat medium in case the heat medium gradually decreases due to evaporation or slight leakage. In FIG. 1, 9 is a terminal device such as a fan coil, 10 is a pump, 11 is a switching valve, 24 is a pipe for supplying water to the hot water storage tank 1,
12 is a piping for supplying hot water from the hot water storage tank 1.
In the hot water supply system with the principle diagram as shown in Figure 1,
It is conceivable to construct a hot water storage tank by disposing the expansion tank 3 on the upper part of the hot water storage tank 1 and covering it with an outer tank 13. In this case, when constructing the hot water tank, the hot water tank is often installed at an angle as shown in Figure 2.
There is a problem that the final portion of the liquid, which is a heating medium, cannot be used, and furthermore, if the expansion tank 3 is placed above the hot water storage tank 1, it becomes an obstacle to lead out the piping for hot water supply from the top of the hot water storage tank 1. There was a problem. Further, when attaching the expansion tank 3 to the upper part of the hot water storage tank 1 whose upper part is approximately bowl-shaped, there is a problem that it is difficult to attach the expansion tank 3 because the upper part of the hot water storage tank 1 is approximately bowl-shaped.

(Purpose of the invention) The present invention was devised in view of the above points, and its purpose is to effectively use the heat medium in the expansion tank until the final amount, and to install the expansion tank in the upper part of the hot water storage tank. To provide a structure of a hot water storage tank equipped with a heat exchanger with an expansion tank that does not interfere with piping to the hot water storage tank even if it is installed.

(Disclosure of the invention) The structure of a hot water storage tank equipped with a heat exchanger with an expansion tank according to the present invention is such that a jacket-type heat exchanger 2 is provided around the outer periphery of a hot water storage tank 1, and the heat exchanger 2 is attached to the upper part of the hot water storage tank 1. In the one provided with the expansion tank 3 that communicates with the expansion tank 3, the expansion tank 3 has a donut shape in plan view,
A support plate 18 is attached to the inner circumference of the donut-shaped expansion tank 1.
The support plate 18 has a curved surface that is concentric with the curved surface of the approximately bowl-shaped upper surface of the hot water storage tank 1, and the support plate 18 is connected to the hot water storage tank 1 through a heat insulating material 14.
The hole 1 is placed on the support plate 18.
9 is provided, and a pipe 4 communicating with the hot water storage tank 1 is passed through, the lower surface 3a of the expansion tank 3 is sloped in the same direction, and the lowest point of the slope is communicated with the heat exchanger 2. With such a configuration, the above-mentioned object of the present invention is achieved.

The present invention will be explained in detail below with reference to Examples. A jacket-type heat exchanger 2 is formed by providing an outer cylinder 5 on the outer periphery of a hot water storage tank 1. This heat exchanger 2 is connected to a heat source such as a collector or a boiler, and heats a heat medium, and the heat exchanger 2 exchanges heat with the heat medium and hot water in the hot water storage tank 1, so that the hot water in the hot water storage tank 1 is heated. It is now heated. The outer periphery of the hot water storage tank 1 to which the heat exchanger 2 is attached is surrounded by a heat insulating material 14.
The expansion tank 3 has a donut shape when viewed from above,
The lower surface 3a of the expansion tank 3 is sloped in the circumferential direction, and a connection port 15 communicating with the heat exchanger 2 is provided at the lowest point of the slope. A float switch 1 for detecting the liquid level of the heat medium in the expansion tank 3 (that is, for detecting when the liquid runs out to ensure safety) is located at a position slightly laterally shifted from the connection port 15.
6 is provided, and an injection port 17 is provided directly above the float switch 16, and this injection port 17 is for injecting a liquid to serve as a heating medium, but also serves as an inspection port for the float switch 16. There is. If the inlet 17 and the connection port 15 are offset as described above (that is, if the connection port 15 is not directly below the inlet 17), the connection port 15 will be connected to the heat exchanger 2, etc. when injecting liquid. The accumulated air comes out, and the air that jumps out from this connection port 15 pushes up the liquid and tries to scatter it as shown by the arrow in Figure 6b, but this scattering occurs because the inlet 17 is misaligned. The liquid is prevented from jumping out from the injection port 17. A support plate 18 is fixed to the inner circumference of the doughnut-shaped expansion tank 3, and the support plate 18 is approximately arm-shaped and has a hole 19 at its top. Here, the support plate 18 has a curved surface that is concentric with the curved surface of the approximately arm-shaped upper surface portion 20 of the hot water storage tank 1. A pipe 4 projects upward from the upper surface 20 of the hot water storage tank 1, and this pipe 4 serves as a pipe 12 for supplying hot water. The piping 4 is provided with a mounting section 21 . Thus, the center hole 19 of the expansion tank 3 is passed through the pipe 2, and the edge of the hole 19 is positioned and placed on the placement part 21, and the support plate 18 is placed on the heat insulating material 14. In this case, the heat insulating material 14 is flexible, and the heat insulating material 14 covers almost the entire surface of the expansion tank 3.
In order to support almost the entire surface of the expansion tank 3 with the heat insulating material 14, the expansion tank 3 is made of a molded product such as polyethylene that becomes somewhat soft when heated. There is also no problem. The connection port 15 of the expansion tank 3 and the heat exchanger 2 are connected by a connection pipe 22. In the figure, 13 is an outer tank, and 23 is a top plate.

(Effects of the invention) As described above, the present invention has an expansion tank shaped like a donut in plan view, the lower surface of the expansion tank is sloped in the circumferential direction, and the lowest part of the slope communicates with the heat exchanger. Therefore, even if the hot water storage tank is tilted when the hot water storage tank is installed, the portion of the expansion tank that communicates with the heat exchanger can be placed at a lower position, and the heat medium in the expansion tank can be used effectively. A support plate is provided on the inner periphery of the doughnut-shaped expansion tank, and this support plate has a curved surface concentric with the curved surface of the approximately bowl-shaped upper surface of the hot water storage tank, and the support plate is connected to the hot water storage tank through a heat insulating material. The expansion tank was placed over the top of the bowl-shaped tank, and a hole was made in the support plate to run the piping that communicated with the hot water tank, so even if the expansion tank was placed above the hot water tank, the expansion tank would come out from the top of the tank. It does not get in the way of the piping, and the support plate can be stably mounted on the top of the hot water storage tank by covering it with an insulating material of the same thickness. Even if the upper part is approximately bowl-shaped, which is the best structure in terms of pressure balance, the doughnut-shaped expansion tank can be stably attached to the top of the hot water storage tank. The space above the shaped part can be effectively used to mount an expansion tank.

[Brief explanation of the drawing]

Fig. 1 is a diagram explaining the principle of a hot water supply system, Fig. 2 is a schematic sectional view of a conventional example, Fig. 3 is a partially cutaway perspective view of the present invention, Fig. 4 is a schematic sectional view of the same, Fig. 5 a,
Figures b and c are a front view, bottom view, and partially cutaway sectional view of the expansion tank used in the present invention, and Figures 6a and b are for explanation showing the positional relationship of the same inlet, connection port, float switch, etc. A partially cutaway perspective view and a partially cutaway sectional view, in which 1 is a hot water storage tank, 2 is a heat exchanger,
3 is an expansion tank, 3a is a lower surface, and 4 is a pipe.

Claims (1)

[Scope of utility model registration request] A jacket-shaped heat exchanger is provided around the outer periphery of the hot water storage tank, and an expansion tank that communicates with the heat exchanger is provided at the top of the hot water storage tank. A support plate is provided on the periphery, and this support plate has a curved surface concentric with the curved surface of the approximately bowl-shaped upper surface of the hot water storage tank, and the support plate is attached to the approximately bowl-shaped upper surface of the hot water storage tank via a heat insulating material. The bottom surface of the donut-shaped expansion tank is sloped in the circumferential direction by making holes in the support plate and passing piping that communicates with the hot water storage tank, and the lowest part of the slope is connected to the heat exchanger. Structure of a hot water storage tank equipped with a tank heat exchanger.