JPH0142789Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Field of industrial application) This invention consists of a solar heat collector and a hot water storage tank placed on both sides of the roof ridge, and a circulating pump to circulate the heat medium. This relates to a solar water heating system that uses forced circulation.

(Prior art and its problems) Conventionally, this type of solar water heating system has a solar water heater 1 that collects solar heat, a hot water storage tank 2, and a ridge 3 on the roof, as shown in Figure 3. It is distributed and arranged. In the figure, reference numeral 4 denotes a circulation pipe connecting the heat collector 1 and the hot water storage tank 2, which is disposed across the ridge 3. In the figure, P indicates a circulation pump. In such a solar water heating system, the circulation piping 4 is arranged on the hot water storage tank 2 side so that the piping runs along the outer wall of the hot water storage tank 2. Further, in order to improve heat collection efficiency and prevent freezing, a heat insulating material is wrapped around the circulation pipe 4. However, in any case, if the circulation piping 4 is exposed to the outside or the heat medium in the piping is at a low temperature, heat retention will be insufficient and heat radiation from the circulation piping 4 will easily occur. It cannot be said to be sufficient.

In particular, in the case of the distribution type solar water heating system as described above, the circulation piping is installed on both sides of the roof ridge, making it easy for the heating medium in the circulation piping to dissipate heat and freeze. That's a problem. Furthermore, among the circulation piping, the above problem is even more serious in the outgoing piping that sends the heat medium from the hot water storage tank side to the heat collector side. That is, in the outgoing piping, the heat medium is likely to freeze in environments with low temperatures such as in winter, and this may cause damage to the circulation piping. moreover,
This poses a problem in that it is difficult to repair or replace the circulation piping.

(Purpose of the invention) The present invention is a practical solar hot water system that prevents heat dissipation and freezing of the heating medium in the circulation piping, especially the outgoing piping, in the distribution type solar water heating system described above, and that facilitates installation and repair work of the piping. The purpose is to provide equipment.

(Structure of the device) In order to achieve the above-mentioned purpose, the present device embeds an outgoing pipe for sending a heat medium from the hot water tank side to the heat collector side in a recess formed on the upper surface side of the hot water storage tank. Therefore, the structure is designed to prevent heat dissipation and freezing of the heating medium, and to facilitate installation and repair of the circulation piping. (Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a partial perspective view of the vicinity of a hot water storage tank according to an embodiment of the present invention. FIG. 2 is a partial vertical sectional view of the hot water storage tank.

In the figure, 5 is a hot water storage tank, 6 is a circulation pump, and 7 is an outgoing pipe of the circulation pipe. The outgoing pipe 7 is connected to the hot water storage tank 5 for circulation by a circulation pump 6 installed at the bottom of the hot water storage tank 5, and by driving the circulation pump 6, the low temperature water in the hot water storage tank 5 is transferred to a heat collector side (not shown). It is designed to circulate. As can be understood from the figure, a recess 8 is formed on the upper surface side of the hot water storage tank 5. The width and depth of the recess 8 are such that the outgoing pipe 7 fits therein and the contact area with the periphery of the outgoing pipe 7 can be made as large as possible. Further, the length of the recess 8 is similarly formed on the upper surface side of the outer peripheral portion of the hot water storage tank 5 so that the contact area with the outgoing pipe 7 is large. The reason why the recess 8 is formed on the upper surface in this manner is that the hot water in the hot water storage tank 5 is stored in the upper part, which is convenient for keeping the outgoing pipe 7 warm. Further, since the circulation pump 6 is disposed, the outgoing pipe 7 is routed upward from the position where the circulation pump 6 is placed so that air locks do not occur due to air in the heat medium.

In this embodiment, the outgoing pipe 7 is connected to the recess 8 of the hot water storage tank 5.
After the outgoing pipe 7 is arranged in the recess 8, the heat retention of the outgoing pipe 7 arranged in the recess 8 is improved by further wrapping the outgoing pipe 7 arranged in the recess 8 together with the hot water storage tank 5 with a heat insulating material such as styrene foam. ing. Note that, even without wrapping the heat insulating material as described above, simply arranging the piping in the recess has a sufficient heat insulating effect. In addition, the shape of the recess forming part, that is, the hot water storage tank disposed part of the outgoing pipe may be formed in a direction other than the linear direction, for example, in the threading direction.

(Effects of the invention) As explained above, in the solar water heating system of the invention, the circulation piping that sends the heat medium from the hot water storage tank to the collector side is buried in the recess formed on the top surface of the hot water storage tank. The following effects are expected.

First, the point where the circulation piping and the hot water storage tank come into contact is on the upper surface side, which is the high temperature part of the hot water storage tank, so it is effective to keep the heating medium in the circulation piping warm, and the heat dissipation of the heating medium is prevented as much as possible. There is no need to worry about damage to circulation piping due to freezing of the heating medium in environments with low temperatures.

Furthermore, since the recess in which the circulation piping is buried is formed on the upper surface of the hot water tank so that work can be easily performed even on the roof, repair and installation of the piping can be performed extremely easily.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view of the vicinity of a hot water storage tank showing an embodiment of the present invention, and FIG. 2 is a partial vertical sectional view of the hot water storage tank. FIG. 3 is a side view showing the solar water heating device. 2, 5...Hot water tank, 6...Circulation pump, 7...
Outgoing pipe, 8... recess.

Claims (1)

[Scope of Claim for Utility Model Registration] A heat collector that receives solar heat and heats a heat medium and a hot water storage tank are separated by a roof ridge, and a circulation pipe is connected between them to form a circulation path. In a solar water heating system in which a heat medium is forcibly circulated by a circulation pump, an outgoing pipe of a circulation pipe for sending a heat medium from the hot water storage tank side to the heat collector side is buried in a recess formed on the upper surface side of the hot water storage tank. A solar water heating device characterized by: