JPS6210560A - Hot water supply system - Google Patents

Abstract

PURPOSE:To reduce the installation space and heat release loss by downsizing the hot water storage capacity of the auxiliary water heating source unit by connecting the auxiliary water heating source unit close to the hot water outlet of the first passage connecting the main water heating source unit and the hot water outlet, and providing a valve that opens and closes the second passage branched from the first passage. CONSTITUTION:When hot water is to be dispensed, the mixing tap 20 is opened, and so is the valve 18 simultaneously. Part of cold water in the hot water supply pipe 6 then pushes up the hot water in the hot water reservoir 10, and also flows into the bypass pipe 15. It is mixed in the primary mixing section 19 with the hot water from the hot water reservoir 10, and then flows on to the mixing tap. The rest of the cold water flows to the auxiliary hot water delivery pipe 16. When the hot water from the main water heating source unit 1 reaches the auxiliary water heating source unit 8, hot water starts coming out of the main water heating source unit 1 starts coming out of the auxiliary hot water delivery pipe 16 as well. To use such hot water, the valve 18 is left opened. Meanwhile, the cold water filled in the hot water reservoir 10 starts being discharged in the auxiliary water heating source unit 8, but, because hot water from the main water heating source unit 1 flows into the bypass pipe 15, the hot water temperature in the primary mixing section 19 hardly becomes lowered, allowing a continuous hot water supply.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water supply apparatus in which a hot water outlet of a terminal is located far away from a hot water heat source device such as a central hot water supply system.

Conventional technology Central hot water supply is commonly used because it has the effect of concentrating the heat source when hot water is supplied to multiple outlets. At the beginning of use, it is inconvenient in actual use that not only does the cold water in the pipes come out, but it also takes time for hot water at a predetermined temperature to come out. As a means to eliminate such inconveniences and inconveniences, for example, Fig.
As shown in Japanese Patent No. 15562), a cushion tank 5 with a heat-retaining heating element 4 inside is installed in the middle of the piping 3 between the main hot water heat source 1 and the hot water outlet 2 of the terminal. The cold water and hot water in the cushion tank 5 are mixed and flowed out from the tap 2, so that the cold water is not directly discharged from the tap 2.

Problems to be Solved by the Invention However, in the conventional configuration described above, the main hot water heat source 1 and the cushion tank 5 are directly connected through the pipe 3, and all of the cold water in the pipe 3 and the hot water in the cushion tank 5 are mixed. Because hot water was flowing out at the beginning of use, hot water comes out immediately at the beginning of use, but the temperature of hot water from hot water supply port 2 should not fall below the lower limit of the hot water supply temperature (generally 30'C7>-40°C). Therefore, the capacity of the cushion tank 5 had to be larger than the capacity of the water in the pipe a.

Means for Solving the Problems The present invention solves these conventional problems.
a main hot water heat source device, a hot water outlet, a first flow path connecting the main hot water heat source device and the hot water outlet, and a sub hot water heat source device connected in the vicinity of the hot water outlet of the first flow path; The water heater includes a second flow path branching from the first flow path between the main hot water heat source device and the auxiliary hot water heat source device, and a valve that opens and closes with the second flow path.

Effect of the present invention With the above-described configuration, the cold water accumulated in the first flow path between the main hot water heat source device and the outlet is transferred to the auxiliary hot water heat source device and the 20th flow path by opening the valve of the second flow path. Since the cold water is divided into two channels and prevents all of the cold water from flowing into the auxiliary water heater, the amount of hot water that can be stored in the auxiliary water heater is reduced by the amount of cold water that flows out from the second flow channel. Become.

Example An embodiment of the present invention will be described below with reference to FIG.

In the figure, an auxiliary hot water heat source 8 is connected to a hot water supply circuit 7, which is formed by connecting a main hot water heat source 1 and a hot water outlet 2 through a hot water supply pipe 6, which is a first flow path. The side hot water heat source device 8 has an electric heater 9 as a heating device installed at the bottom of the hot water storage tank 10, and controls the heater input with a hot water temperature controller 12 according to the temperature detected by a hot water temperature thermometer 11, thereby achieving a predetermined temperature. maintains a high temperature. At the lower end of this hot water storage tank 10 there is an inlet pipe 13. An outlet pipe 14 is provided at the upper end, and the inlet pipe 13 and outlet pipe 14 are connected in parallel to the hot water storage tank 10 by a bypass pipe 15. Near the inlet pipe 13 of the hot water supply pipe 6, there is a branch part 1 to the auxiliary hot water outlet pipe 16, which is a second flow path.
7 is installed to divide the flow from the main hot water heat source device 1 into two into the auxiliary hot water heat source device 8 side and the auxiliary hot water outlet pipe 16 side. A valve 18 is provided in the middle of the auxiliary hot water tap pipe 16 to open and close the auxiliary hot water tap pipe as desired. 1, which is the contact point between the outlet pipe 14 and the bypass pipe 15;
The secondary mixing section 19 is connected to a mixing faucet 2o provided at the tap water outlet 2. On the other hand, the water supply pipe 21 is connected to a water supply circuit 23 that supplies tap water to the main water heater 1 and the mixing faucet 20 through a water pipe 22 .

In the above configuration, when hot water is used, the valve 18 is also opened at the same time as the mixing faucet 20 is opened. Then, one side of the cold water in the hot water supply pipe 6 works to push up the hot water in the hot water tank 10 and flows into the bypass pipe 16. The flow mixes with the high temperature hot water in the hot water storage tank 10 in the primary mixing section 19 and flows to the mixing faucet at an appropriate temperature. The other side of the cold water in the hot water supply pipe 6 flows to the auxiliary hot water outlet pipe 16.

When the hot water from the main water heater 1 eventually reaches the auxiliary hot water heater 8, the hot water from the main water heater 1 starts coming out from the auxiliary hot water pipe 16 as well. If this hot water is used as it is, leave the valve 18 open; if not, close the valve 18.

On the other hand, in the auxiliary water heater, the cold water accumulated in the hot water storage tank 10 begins to flow out, but since the hot water from the main water heater 1 flows into the bypass pipe 15, the water temperature in the primary mixing section 19 almost drops. Continuous hot water supply is possible without any problems.

Therefore, since the amount of water flowing out from the auxiliary hot water pipe 16 does not flow to the auxiliary hot water heat source device 8, even if the capacity of the hot water storage tank 10 is reduced by that amount, the water in the main hot water heat source device 1 will be filled before the hot water in the hot water storage tank 10 runs out. is reached. In this way, the capacity of the hot water tank 10 can be reduced.

Further, since the bypass pipe 15 is provided in parallel to the hot water storage tank 10, the amount of water flowing into the hot water storage tank 10 is divided by Ir12, and the capacity of the hot water storage tank 10 can be made small.

Furthermore, hot water can be obtained immediately after hot water supply starts, and water from the auxiliary hot water pipe can also be used at the same time, making it highly efficient.

Although the main hot water heat source device in the embodiment was not limited, if it was a gas instantaneous water heater, it would not ignite unless the amount of water exceeded the ignition water amount, so hot water could not be supplied with a small amount of water in some cases. According to the present invention, if the water volume in the second flow path is set to a value larger than the ignition water volume, the gas instantaneous water heater can be stably ignited even when a low water volume is supplied at the outlet. It is possible.

As described in detail, the water heater of the present invention provides the following effects.

(1) Since the water stagnant in the first flow path flows not only to the auxiliary water heater but also to the second flow path, the hot water storage capacity of the auxiliary hot water heater can be reduced, reducing installation space and auxiliary hot water supply. This reduces the heat radiation loss of the heat source device.

(2) The water accumulated in the first flow path is mixed and heated by the auxiliary hot water heat source near the hot water outlet, so the time from opening the hot water tap at the hot water outlet until hot water comes out is extremely shortened, making it easier to use. is good.

(3) Since the water stagnant in the first flow path can be taken out from the second flow path during hot water supply, the stagnant water can be reused and energy is saved.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a water heater showing an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional water heater. 1... Main hot water heat source, 2... Hot water outlet,
6...First channel, 8...Sub-hot water heat source device, 16...Second channel, 18...Valve. Name of agent: Patent attorney Toshio Nakao and one other person
,,Main water heater heat source? , exit/exit...'4tnJtanIll...intermediate

Claims (1)

[Claims] a main hot water heat source device, a hot water outlet, a first flow path connecting the main hot water heat source device and the hot water outlet, and a sub hot water heat source device connected in the vicinity of the hot water outlet of the first flow path; A water heater comprising: a second flow path branching from the first flow path between the main hot water heat source device and the auxiliary hot water heat source device; and a valve that opens and closes the second flow path.