JPS5826504B2 - Combination system of solar water heater and hot water boiler - Google Patents

Description

Detailed Description of the Invention The present invention combines a solar water heater and a hot water boiler or an electric water heater for the purpose of resource saving, and provides a solar water heater and a hot water boiler that are equipped with a single switching valve so that they can be used together effectively. This relates to a combination system.

Conventionally, such solar water heaters and hot water boilers or electric water heaters have been installed separately, and each is operated independently to supply hot water, making it possible to effectively utilize the heat from both. However, since multiple switching valves are required to switch between the two, the operation becomes complicated and there is a risk of erroneous operation.Also, when the boiler is used alone, water must be supplied directly to the boiler from the water pipe. Therefore, it was necessary to install a pressure reducing valve in that passage to prevent excessive water pressure from being applied to the boiler.

In view of these drawbacks, the present invention combines a solar water heater and a boiler or an electric water heater into a single unit that allows easy switching between each and allows hot water heated by the solar water heater to be used as preheating water for the boiler. An example of the implementation of the present invention will be described below based on the drawings, in which a switching valve is provided to solve the above-mentioned drawbacks. The combination system of a solar water heater and a boiler according to the present invention is illustrated in FIG. 1. It consists of a solar water heater 1 mounted and fixed on the roof, a boiler 2 installed outdoors, a switching valve 3 and a hot water mixing tap 4 installed indoors.

Note that the installation location of the switching valve 3 is not limited in any way, and may be installed at a location convenient for the user.

First, the case of using the solar water heater 1 will be explained. Water sent from the water pipe 5 is branched and one side is connected to the water inlet 6 of the hot water mixing faucet 4, and the other side is connected to the hot water storage part of the solar water heater 1. Connected to 7.

The hot water storage section 7 is equipped with a water level differential type ball tap 8, so that when the hot water storage section 7 is full of water, the ball tap 8 is operated to automatically stop the supply of water beyond that point.

The water supplied to the hot water storage section 7 is sent to the heat receiving section 9 which absorbs solar heat and converts it into hot water.The hot water that has absorbed solar heat in the heat receiving section 9 is sent to the hot water storage section 7 again, The water is discharged 5 through the discharge port 10 and sent to the switching valve 3 .

The switching valve 3 has three valves 11 and 11 as shown in FIG.
', 11'', three valve seats 12, 12'.

12'', an inlet 13 from the boiler 2, an inlet 13' from the solar water heater 1, an outlet 14 to the boiler 2, an outlet 15 to the hot water mixing faucet 4, and a valve 11 and a valve seat 12. opens and closes between the inlet 13 and the outlet 15, and the valve 1
1' and valve seat 12' open and close between the inlet port 13' and the discharge port 15, and the valve element 11'' and valve seat 12'' play the role of opening and closing between the inlet port 13' and the discharge port 14. Benko 11, 1
1' and 11'' are interlocked.

In the state shown in FIG. 2, the valves 11 and 11'' are in the closed state, and the valve 11' is in the open state, so hot water from the solar water heater 1 flows through the inlet 13. ' into the switching valve 3, and from the discharge port 15 to the inlet 1 of the hot water mixing faucet 4.
The water is mixed with the water flowing in from the water inlet 6 at the hot water mixer faucet 4, adjusted to an appropriate operating temperature, and used for water supply in the kitchen or bathroom, shower, etc.

In the summer, hot water close to boiling water can be obtained only by the solar water heater 1 as described above, and in the winter, the hot water obtained by the solar water heater 1 is sent to the boiler 2 as explained below. It can be effectively used as preheating water.

As mentioned above, in order to use hot water from the solar water heater 1 as preheating water for the boiler 2, by switching the switching valve 3 as shown in FIG. 3, the valves 11'' and 11' are in the open state. In addition, since the valve 11' can be left open, hot water from the solar water heater 1 flows into the switching valve 3 through the inlet 13', and flows into the inlet 17 of the boiler 2 through the outlet 14. After being heated in the boiler 2, it is sent from the discharge port 18 of the boiler 2 to the inlet 13 of the switching valve 3, and flows from the discharge port 15 to the inlet 16 of the hot water mixing faucet 4,
It is mixed with the water flowing in from the water inlet 6 through the hot water mixer faucet 4, adjusted to an appropriate operating temperature, and can be used for tap water in the kitchen or bathroom, shower, etc.

As mentioned above, water is supplied to the boiler 2 from the solar water heater 1, and in this case, the head difference between the solar water heater 1 and the boiler 2 is used, so the water pressure is always constant, similar to when water is supplied from a water pipe. There is no need for a pressure reducing valve etc.

As another embodiment, if the switching valve 3 is incorporated into the hot water mixer faucet 4 and integrated, all switching operations between the solar water heater 1 and the boiler 2 and the mixing of hot water and water can be performed in the kitchen or bathroom. It can be done.

In short, the present invention branches the water pipe 5, connects one end to the water inlet 6 of the hot water mixer tap 4, and connects the other end to the solar water heater 1, and inlets 13' for hot water from the solar water heater 1; A discharge port 14 to the boiler 2, an inlet 13 for hot water from the boiler 2, and a water inlet 16 for the hot water mixing tap 4.
A solar water heater 1, a boiler 2, and a hot water mixing tap 4 are respectively connected to a switching valve 3 having a discharge port 15 to the switching valve 3.
As a result of this operation, the passage with the boiler 2 is closed and only the passage that sends hot water from the solar water heater 1 to the hot water mixing faucet 4 is opened. Hot water can be supplied to a mixer faucet installed in a bathroom, etc., and by switching the switching valve 3, hot water from the solar water heater 1 is sent to the boiler 2, and hot water reheated by the boiler 2 is mixed with hot water. Since the solar water heater 1 can be used to preheat water to the boiler 2 even in winter, the heat source of the boiler 2 can be saved, and there is no need for a pressure reducing valve or the like in the water supply passage to the boiler 2. First, since the above switching operation can be performed by only one operation of one switching valve, it is reliable and easy, and the number of piping tanks is simple.

In addition, since the switching valve 3 can be built into the hot water mixer faucet 4, the above-mentioned switching operation and mixing operation of hot water and water in the kitchen, bathroom, etc. can be performed easily and with one touch at the place where hot water is used. The practical effects are enormous.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention, and Fig. 1 is a diagram showing a circuit of a combination system of a solar water heater and hot water boiler according to the invention, and Figs. 2 and 3 show operating states of the switching valve. FIG. 1...Solar water heater, 2...Boiler, 3...Switching valve, 4...Hot water mixing faucet,
5...Water pipe, 11°11', 11"...
...Bentko.

Claims (1)

[Scope of Claims] 1. A water pipe is branched to connect one side to a water inlet of a hot water mixing faucet and the other side to a solar water heater, with an inlet 13 from the solar water heater and an outlet 14 to the boiler. ,
It has an inlet 13 for hot water from the boiler and a discharge port 15 to the inlet of the hot water mixing faucet, and between the inlet 13 and the outlet 15, between the inlet 13 and the outlet 15, and in the inlet 13.
A solar water heater, a boiler, and a hot water mixer tap are each connected to a switching valve having three valves that open and close in conjunction with the discharge port 14, and the operation of the switching valve closes the passage to the boiler and disconnects the solar water heater from the solar water heater. It is now possible to switch between a circuit that opens only the path that sends hot water to the hot water mixer tap, and a circuit that opens the path that sends hot water from the solar water heater to the boiler and reheats the hot water in the boiler to the hot water mixer tap. This is a combination system of solar water heater and hot water boiler. 2. The solar water heater and hot water boiler combination system according to claim 1, wherein the switching valve is integrated into a hot water mixing faucet.