JPH0463290B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water supply device 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 Publication 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, and the piping 3 The cold water and the 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 connected directly. Because hot water is mixed and drained, hot water comes out immediately at the beginning of use, but the temperature of hot water from hot water supply port 2 must be set at the lower limit of the hot water supply operating temperature (generally 30℃ to 40℃).
℃), the capacity of the cushion tank 5 had to be larger than the capacity of the water in the pipe 3.

Means for Solving the Problems The present invention solves these conventional problems, and includes a main water heater, a hot water outlet, and a first water heater that connects the main hot water heat source and the hot water outlet. 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; The second flow path includes a flow path and a valve that opens and closes the second flow path.

Effect The present invention has the above-described configuration, so that the cold water accumulated in the first flow path between the main water heater and the hot water outlet can be
The valve of the second flow path is opened and the cold water is divided into two parts, the auxiliary water heater and the second flow path, so that all of the cold water does not flow into the auxiliary water heater, so the cold water flows out from the second flow path. The amount of hot water that can be stored in the auxiliary water heater will be reduced by the amount of cold water used.

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

In the figure, the main hot water heat source 1 and the hot water outlet 2 are connected to the
An auxiliary hot water heat source 8 is connected in the vicinity of a hot water outlet 2 of a hot water supply circuit 7 connected by a hot water supply pipe 6 which is a flow path. The auxiliary hot water heat source device 8 has an electric heater 9, which is a heating device, installed inside 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. Maintains a predetermined high temperature. An inlet pipe 13 is provided at the lower end of this hot water storage tank 10, an outlet pipe 14 is provided at the upper end,
The inlet pipe 13 and the outlet pipe 14 are connected to a bypass pipe 15.
It is connected in parallel with the hot water storage tank 10 by. Near the inlet pipe 13 of the hot water supply pipe 6, a branch part 17 to the auxiliary hot water outlet pipe 16, which is a second flow path, is provided to divert the flow from the main hot water heat source 1 to the auxiliary hot water source 8 side and the auxiliary hot water outlet pipe 16 side. It is divided into 2 minutes. 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. A primary mixing section 19, which is a contact point between the outlet pipe 14 and the bypass pipe 15, is connected to a mixing faucet 20 provided at the outlet 2. On the other hand, water supply pipe 21
is the main water heater 1 and the mixing faucet 2 from the water pipe 22.
0 and is connected to a water supply circuit 23 that supplies tap water to both.

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 15. 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. Eventually, when the hot water from the main water heater 1 reaches the auxiliary hot water heater 8,
Hot water from the main water heater 1 also begins to come out from the auxiliary hot water supply pipe 16. 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 hot water heat source device, the cold water accumulated in the hot water storage tank 10 starts to flow out, but since the hot water from the main hot water heat source device 1 flows into the bypass pipe 15, the primary mixing section 19
Continuous hot water supply is possible with almost no drop in hot water temperature.

Therefore, the amount of water flowing out from the auxiliary hot water outlet pipe 16 does not flow to the auxiliary hot water heat source device 8, so even if the capacity of the hot water storage tank 10 is reduced accordingly, the water flowing out from the auxiliary hot water supply pipe 16 is transferred to the main hot water heat source device 1 before the hot water in the hot water storage tank 10 runs out. The hot water arrives. 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 into two, and the amount of water in each 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 water heater heat source device in the example was not limited,
Gas instantaneous water heaters do not ignite unless the amount of water exceeds the ignition amount, so there are cases where hot water cannot be supplied with a small amount of water. 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.

Effects of the Invention As explained above, 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 hot water heat source but also to the second outlet, the hot water storage capacity of the auxiliary hot water heat source can be reduced, reducing the installation space and the auxiliary hot water heat source. This reduces the heat radiation loss of the 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 easy 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.
It is energy saving.

[Brief explanation of the drawing]

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. DESCRIPTION OF SYMBOLS 1... Main water heater heat source device, 2... Hot water outlet, 6... First flow path, 8... Sub-hot water heat source device, 16... Second flow path, 18... Valve.

Claims (1)

[Claims] 1. 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 an auxiliary hot water heat source device connected to the first flow path near the hot water outlet. , 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;
A water heater comprising a valve that opens and closes the second flow path.