JPS5816617Y2 - Natural circulation solar water heater - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of the heat collecting plate of a natural circulation solar water heater, which consists of a hot water storage tank and a plurality of heat collecting plates.

Conventionally, as shown in FIG. 1, a rain channel 5 and a heat collection water channel 6 are arranged inside by a partition 4, and a heat collecting plate 1 having a water supply port 2 and a hot water outlet 3 on the left and right sides of the upper part is connected to a connecting pipe 7. A natural circulation type solar water heater connected below the hot water storage tank 8 is known.

The size of the heat collection plate 1 of the water heater shown in Figure 1 is limited due to transportation, delivery, installation, etc., and in a typical household, one heat collection plate of a certain size is connected below the hot water tank. This type of water heater has been widely used.

However, because the hot water supply capacity of the above-mentioned water heater is low, the hot water storage tank is larger than the conventional one, as shown in Figure 3, and a plurality of heat collecting plates are installed below the hot water storage tank with water inlets and hot water outlets at both left and right ends. A system was developed that connected the .

However, the heat collecting plates 1, 1 have water supply ports 2 on the left and right sides of the upper part.
, since the tap water outlet 3 was provided, there were the following drawbacks.

In other words, when installing this natural circulation solar water heater on a roof, etc., generally one hot water storage tank 8 is installed as shown in Fig. 3.
Since the structure is such that the two heat collecting plates 1, 1 are connected below the connecting pipe 7., the connecting pipe 7. Although it is necessary to perform connection work using γ,
The above-mentioned connection work at the lower center of the hot water storage tank, which has a width of 2 m, was not only extremely difficult to perform, but also extremely dangerous because it was performed at a high place.

The present invention has been developed in view of the above-mentioned drawbacks, and includes a water inlet, a hot water outlet, and a hot water storage provided on the heat collecting plate of a natural circulation solar water heater, which has a hot water storage tank above and a plurality of heat collecting plates below. The purpose is to make the connection with the tank easier, and the gist is that the water supply ports of the left and right end heat collecting plates are located on the outer side above the heat collecting plate, and the hot water outlet is located on the outside side of the heat collecting plate. This is because they are located adjacent to the center of the water heater along with the water inlet.

An embodiment of the present invention will be described below with reference to FIGS. 2 and 4.

1a and Ia are two left and right heat collecting plates integrally molded from thermoplastic synthetic resin such as polyethylene and connected to the lower part of the hot water storage tank 8 by a connecting pipe 7, and the inside is divided into a rain channel 5a and a heat collecting plate by a partition 4a. A waterway 6a is formed.

Reference numeral 2a is a water supply port provided on the outer side of the left and right heat collecting plates 1a, 1a of the water heater, and 3a is a water supply port provided adjacent to the center side of the water heater 2a together with the water supply port 2a. It is a hot water outlet.

In the above embodiment, two heat collecting plates 1a are provided, but two or more heat collecting plates 1a may be provided. may be either to the left or to the right.

When the heat collecting plate 1a described above is connected to the hot water storage tank 8 and water is heated by solar heat, the water naturally circulates as shown by the arrow in Fig. 2, and unlike the case of the conventional heat collecting plate 1 shown in Fig. 1, each Heat collection waterway 6
Since the distance through which water passes through a changes, it causes a difference in channel resistance, which seems to create an imbalance in water circulation and reduce heat collection efficiency, but the above drawbacks were not observed as a result of experiments. Ta.

This is thought to be because the circulating force is generated by the draft force of each water channel, and the circulating water flow is small in ratio to the cross-sectional area of the water channel.

As shown in Fig. 4, the heat collecting plate according to the present invention can have the water inlet and hot water outlet located on both sides of the hot water tank, so that the work of connecting the heat collecting plate and the hot water tank can be done at both ends of the hot water tank. This not only makes the work easier, but is also extremely effective in terms of safety.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional natural circulation solar water heater;
The figure is a cross-sectional view of the heat collecting plate according to the present invention. Figure 3 is a front view of a conventional natural circulation solar water heater using two heat collecting plates. Figure 4 is a front view of the natural circulation solar water heater according to the present invention using two heat collecting plates. Explanation of symbols, 1, 1a... Heat collecting plate, 2, 2a.
...Water inlet, 3, 3a... Hot water outlet, 4,
4a... Partition body, 5, 5a... Downfall channel, 6, 6a... Heat collection waterway, 7... Connecting pipe, 8... ... Hot water storage tank, 9... Ripple water supply device.

Claims (1)

[Scope of utility model registration request] A natural circulation solar water heater that is constructed by arranging a plurality of heat collecting plates with a hot water storage tank above and a water supply inlet and hot water outlet below, and connecting the hot water storage tank and the water inlet and hot water outlet of the heat collecting plate with a connecting pipe. In the natural circulation system, the water supply ports of the left and right heat collecting plates are provided on the outer surface side above the heat collecting plates, and the hot water outlet is arranged adjacent to the center side of the water heater along with the water supply ports. solar water heater.