JPS5818112Y2 - Solar hot water supply system - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a solar hot water supply system.

Conventionally used solar water heating systems mainly consist of a natural circulation solar water heater with a heat collector and a hot water storage tank above it, and an auxiliary heater.

The conventional hot water supply system will be explained using FIGS. 2 to 4. Reference numeral 5a is a water supply pipe from a water supply source to a solar water heater, and water is supplied to the water supply via a ball tap 6 provided in a hot water tank 7 shown in FIG. The water flows between the partition plate 12 and the tank wall, passes under the partition plate 12, and enters the hot water tank 7.

Reference numeral 4 denotes an upper hot water sampling pipe for sampling hot water from the upper layer of the hot water storage tank 7, and heated water from the solar water heater flows into the auxiliary heater 2 through the upper hot water sampling pipe 4.

Reference numeral 5 indicates a lower hot water sampling pipe, which is connected to an auxiliary heater and used in combination with the upper hot water sampling pipe 4 when hot water from the entire hot water storage layer is sampled. Hot water tank 7
The outlet of the lower hot water sampling pipe 5 is closed with a blind plug or the like.

Note that as the auxiliary heater 2, a hot water storage type water heater or an instantaneous type water heater is normally used.

Reference numeral 3 denotes an automatic mixing faucet as shown in FIG. 4, which is connected in the middle of a hot water supply pipe 23 that is connected from the auxiliary superheater 2 to end devices such as faucets, showers, etc.;
Water supply port 20, hot water supply port 21. It has a mixed water outlet 22, and has the function of moving the hot water valve 16 and balance valve 17 up and down by expansion and contraction of the heat sensitive member 15, mixing the supplied water and hot water, and supplying mixed water at a constant temperature from the mixed water outlet 22. .

Normally, water is supplied directly to the automatic mixing faucet 3 from the water supply, as shown by the arrow hole in FIG.

However, it has been found that the above-mentioned direct water supply method has the following drawbacks and is inconvenient.

That is, in the automatic mixing faucet 3 shown in FIG. 4, due to its structure, for example, a slight gap a is likely to be formed between the hot water valve 16 and the surrounding wall.

Therefore, when the faucet at the end is shut off, the water supply from the tap enters through this gap, but on the other hand, the water supply side of the solar water heater is separated from the water supply by the ball tap 6, and the hot water from the solar water heater is connected to the water heater. The hot water is supplied by the head difference from the installation location, so the hot water pressure is generally lower than the water pressure.

Therefore, the water that has entered through the above-mentioned gap flows back in the direction of arrow B in FIG.
There is a drawback that it overflows from the inside.

In order to eliminate the above drawbacks, for example, there is a method of providing a check valve between the auxiliary heater 2 and the automatic mixing faucet 3, but this not only increases pressure loss but also increases cost.

This invention was developed in view of the above-mentioned drawbacks, and it is an inexpensive solar water heating system that has an automatic mixing faucet in the hot water pipe to provide a constant water temperature, and has a structure that prevents backflow even when water is supplied. It is intended to be provided to the public.

Embodiments of the present invention will be described below with reference to FIGS. 1, 3, and 4.

Reference numeral 1 denotes a heat collector consisting of a heat collector integrally formed of synthetic resin or the like, with a water passage formed inside and an inlet and an outlet above, and a casing for housing the heat collector.

A hot water storage tank 7 is fixed above the heat collector 1 and is connected to the heat collector 1 by an outgoing pipe 11 and a return pipe 9.

An automatic water supply device (ball tap) 6 connected to a water supply pipe 5a from a water supply source is fixed above the internal side wall, and high temperature water and automatic water supply device 6 are connected to the automatic water supply device 6 side of the hot water tank 7.
A partition plate 12 is provided at the bottom to prevent direct mixing of tap water.

Further, an upper hot water sampling pipe 4 is provided protruding from the upper part of the interior of the tank 7 for constantly sampling high temperature hot water, and a lower part of the bottom near the partition plate 12 is used when the entire hot water of the tank 7 is used. A hot water sampling pipe 5 is provided, and the outlet of each pipe 4 and 5 is brought out to the side wall of the tank 7.

Note that the lower hot water sampling pipe 5 is generally not used very much when installed, so it is closed off with a blind plug.

2 is an auxiliary heater that has a hot water storage type water heater, an instantaneous water heater, etc. built in, and is a hot water storage tank 7 of a natural circulation type solar water heater.
It is connected to the upper hot water sampling pipe 4 and the connecting pipe 4a, and
Terminal equipment such as faucets and showers for use (not shown)
The hot water supply pipe 23 is connected to the hot water supply pipe 23.

3 is a water supply port 2 provided on the auxiliary heater side of the hot water pipe 23
0, it is an automatic mixing faucet having a hot water supply inlet 21 and a mixed water outlet 22, and the hot water supply inlet 21 and the mixed water outlet 22 are connected to a hot water supply pipe 23.
The water supply port 20 is connected to the lower hot water sampling pipe 5 of the hot water storage tank 7 via a connecting pipe 5e.

The automatic mixing faucet 3 has a heat-sensitive member 1 as shown in FIG.
5 moves the hot water valve 16 and the balance valve 17 up and down to mix the supplied water and hot water, and supply mixed water at a constant temperature from the mixed water outlet 22.

That is, a part of the water that has been cut off from the water supply by the automatic water supply device (ball tap) 6 and has flowed into the hot water storage tank 7 can be supplied to the automatic mixing faucet 3 from the lower hot water sampling pipe 5.
In this case, although there are some differences such as the head difference between the upper and lower hot water intake ports and the pressure loss when passing through the auxiliary heater, the pressure of the water supply entering the mixer faucet and the hot water supply are almost the same, and backflow of water is prevented. Ru.

In the above embodiment, when the lower hot water sampling pipe 5, which draws the entire hot water from the hot water storage tank 7 at once, is not connected to the auxiliary heater 2, the lower hot water sampling pipe 5 and the automatic mixing faucet 3 are connected. Although the configuration is such that they are connected by a connecting pipe 5C, in a system where the lower hot water sampling pipe 5 is connected to the auxiliary heater 2 and used, another lower hot water sampling pipe may be provided in the hot water storage tank 7.

Therefore, the present invention can supply water to the automatic mixing faucet at almost the same water pressure as the hot water pressure of the solar water heater, which is independent of the tap water pressure that is separated from the water supply, so that water can be supplied from the automatic mixing faucet to the solar water heater. There is no problem of backflow to the water, and the lower part of the solar water heater can be used, so it can be provided at a low cost and has extremely great effects.

Although this example shows the case of a natural circulation type solar water heater, the present invention is not limited to this, and can be applied to a solar water heater having a water supply source such as a gas tank where the water pressure of the tap water is not directly applied to the hot water circulation circuit. Not even.

[Brief explanation of the drawing]

Figure 1 is a diagram of the solar hot water supply system according to the present invention, Figure 2
The figure is a diagram of a conventional solar hot water supply system, Figure 3 is a partially cutaway perspective view of a hot water storage tank of a natural circulation solar water heater, and Figure 4 is a sectional view of an automatic mixing faucet. Explanation of symbols 1... Heat collector, 2... Auxiliary heater, 3... Automatic mixing faucet, 3a...
...Water supply pipe, 4...Top hot water sampling pipe, 4a...
...Connecting pipe, 5...Lower hot water sampling pipe, 5a...
... Water supply pipe, 5b ... Drain pipe, 5C ...
・Connecting pipe, 6...Automatic water supply device (ball tap), 7...Hot water tank, 8...Heat insulation material, 9
... Return pipe, 10 ... Overflow pipe, 11 ... Outgoing pipe, 12 ... Partition plate,
13... Exterior, 14... Frame, 15.
...Thermo element, 16 ... Hot water valve, 17 ... Balance valve, 18 ... Spring, 19 ... Adjustment screw, 20.・・・・・・
Water supply inlet, 21...Hot water inlet, 22...Mixed water outlet, 23...Hot water pipe.

Claims (1)

[Scope of utility model registration request] The upper part of a natural circulation solar water heater, which is constructed by connecting a hot water storage tank with an automatic water supply device connected to a water supply pipe inside, an upper and lower hot water intake, etc., and a heat collector via outgoing pipes and return pipes. In a hot water system in which a hot water intake and an auxiliary superheater are connected by a connecting pipe and a hot water supply pipe is installed between the superheater and end equipment, an automatic mixing faucet is installed in the middle of the hot water pipe. A solar hot water supply system characterized by connecting a water supply port and a lower hot water intake port of a hot water storage tank with a connecting pipe.