JPS6210559A - Hot water supply system - Google Patents

Abstract

PURPOSE:To reduce the space occupied by an auxiliary water heating source unit as well as the heat release loss by downsizing the hot water storage capacity of the auxiliary hot 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 an opening/closing valve that opens/closes the second passage branched from the first passage depending on the temperature and flow rate of the first passage. CONSTITUTION:When hot water is to be dispensed, the hot water regulator valve 22 and the water regulating valve 23 disposed in the hot water outlet 2 are opened in a desired amount. If the temperature of the cold water filling the hot water supply pipe 6 is lower than the set temperature of the opening/closing valve 17, the solenoid valve 18 stays open, and part of the incoming cold water from the hot water supply pipe 6 pushes up the hot water in the hot water reservoir 9. It also flows to the bypass pipe 14 to be mixed in the primary mixing section 25 with the high temperature hot water from the hot water reservoir 9, and flows on to the secondary mixing section 24, while the rest of the cold water flows to the auxiliary hot water delivery pipe 15. When the hot water from the main water heating source unit 1 reaches the branching section 16, the temperature of the hot water supply pipe 6 rises to exceed the set temperature of the opening/closing valve 17 to cause the solenoid valve 18 to close, whereupon all of the hot water flowing in the hot water supply pipe 6 is routed through the auxiliary water heating source unit 7 to be dispensed out of the outlet 2.

Description

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

Conventional technology Sentra? Hot water supply is commonly used because it has the effect of concentrating the heat source when supplying hot water to multiple outlets, but since the outlet located far away from the heat source has a long piping route, In practical use, it is inconvenient that not only does the cold water in the pipes come out, but it also takes time for the 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 5ki with a heat-retaining heating element 4 inside is placed 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 a
The cold water from the cushion tank 5 is mixed with the hot water from the cushion tank 5.
The structure is such that cold water does not flow directly from the outlet 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 flows out from the hot water supply port 2, hot water comes out immediately at the beginning of use, but in order to prevent the temperature of the hot water from the hot water supply port 2 from falling below the lower limit of the hot water supply operating temperature (generally 30°C to 30°C), a cushion is installed. The capacity of the tank 5 needed to be larger than the capacity of the water in the pipe 3.

This not only increases the installation space and weight, but also increases heat dissipation loss from the cushion tank.

Means for solving all problems The present invention solves these conventional problems.
a main hot water heat source device, a hot water outlet having a hot water flow control valve, a first channel connecting the main hot water heat source device and the hot water outlet, and a sub-channel connected to the first channel near the hot water outlet. a hot water heat source device, 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; It is equipped with an on-off valve that opens and closes the 20th flow path.

Effect of the present invention With the above-described configuration, when the hot water flow control valve is opened, if the temperature of the cold water accumulated in the first flow path between the main hot water heat source device and the hot water outlet is low and there is a flow, the first flow is activated. The on-off valve of the second flow path is opened, and the cold water in the first flow path is transferred to the sub hot water heater and the second flow path.
The flow path is divided into two, so that part of the cold water flows to the auxiliary water heater. Therefore, the amount of hot water stored in the auxiliary hot water heat source device is reduced by the amount of cold water flowing out from the second flow path. Eventually, the hot water from the main hot water source reaches the auxiliary hot water source, and when the temperature in the first flow path rises, by closing the on-off valve, all the hot water from the main hot water source flows to the outlet, resulting in continuous hot water supply. is possible. Further, even when there is no flow in the tenth flow path, it acts to close the on-off valve.

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

In the figure, a main hot water heat source 1 and a hot water outlet 2 are connected by a hot water supply pipe 6, which is a first flow path, and a sub hot water heat source 7 is connected to the hot water supply pipe 6 near the hot water outlet 2. The auxiliary hot water heat source device 7 has an electric heater 8 internally installed at the bottom of the hot water storage tank 9, and maintains a predetermined high temperature by controlling the heater input with a hot water temperature controller 11 according to the temperature detected by a hot water temperature thermometer 10. are doing. An inlet pipe 12 is provided at the lower end of the hot water tank 9, and an outlet pipe 13 is provided at the upper end, and the inlet pipe 12 and the outlet pipe 1a are connected to the hot water tank 9 in parallel via a bypass pipe 14. Upstream of the auxiliary hot water supply heat source device 7 of the hot water supply piping 6, a branch portion 16 to the auxiliary hot water supply pipe 15, which is the 20th flow path, is installed to connect the flow from the main hot water supply heat source device 1 to the auxiliary hot water supply heat source device 7 side and the auxiliary hot water supply pipe 15. It is divided into two parts on the pipe 15 side.

An on-off valve 17 for opening and closing the auxiliary hot water tap pipe 16 is provided on the side of the auxiliary hot water tap pipe 15 of the branch portion 16. This on-off valve 17IIi
, a solenoid valve 18 inserted into the auxiliary hot water outlet pipe 15, and a hot water supply pipe 6
a temperature sensor 19 that detects the water temperature near the branch 16 of the water supply pipe 6; a flow rate switch 20 that sends a signal depending on the presence or absence of flow in the hot water supply pipe 6; and a controller that controls the opening and closing of the solenoid valve 18 based on the signals from the temperature sensor 19 and the flow rate switch 20. 21
When the temperature detected by the temperature sensor 19 exceeds a preset temperature, or when the flow rate switch 20 outputs a signal indicating no water flow (off signal), the solenoid valve 1
8 is closed, and when the temperature detected by the temperature sensor 19 is below the set temperature and the flow rate switch 20 is outputting a signal indicating that water is present (on signal), the solenoid valve 18 is controlled to be opened. The hot water outlet 2 is connected to the outlet of the hot water flow control valve 22 and the water flow control valve 2.
The outlet of No. 3 is continuously fed by the secondary mixing section 24, and the mixed hot water flows out. A primary mixing section 25, which is the confluence of the outlet pipe 13 and the bypass pipe 14, is connected to the hot water flow control valve 22.

On the other hand, the water supply pipe 26 is connected to the water supply pipe 27 so as to supply tap water to the main hot water heat source 1 and the water flow control valve 23 .

The drive setting temperature of the on-off valve 17 is determined to allow water to pass through the auxiliary hot water pipe 15 but not hot water, and may be set to around 30°C.

In the above configuration, when hot water is used, the hot water flow control valve 22 and the water flow control valve 23 are opened to an arbitrary opening degree. The valve 18 is in an open state, and one side of the flowing cold water from the hot water supply pipe 6 works to push up the hot water in the hot water storage tank 9, and also flows to the bypass pipe 14 and is mixed with the hot water in the hot water storage tank 9 in the primary mixing section 25. Secondary mixing section 2 mixes with hot water at an appropriate temperature.
Flows to 4. The other side of the cold water in the hot water supply pipe 6 flows to the auxiliary hot water outlet pipe 15. Eventually, the hot water from the main water heater 1 will flow to the branch 1.
6, the temperature of the hot water supply pipe 6 rises and the on-off valve 17
The temperature exceeds the set temperature, and the solenoid valve 18 closes.

Therefore, all the hot water flowing through the hot water supply pipe 6 passes through the auxiliary hot water supply heat source device 7 and flows out from the hot water outlet 2. On the other hand, the sub-hot water heat source 7
Then, the cold water accumulated in the hot water storage tank 9 begins to flow out, but since hot water from the main hot water heater 1 flows into the bypass pipe 14, the temperature of the hot water in the primary mixing section 25 hardly decreases, and continuous hot water supply is possible. It is possible.

As described above, the amount of water flowing out from the auxiliary hot water supply pipe 15 does not flow to the auxiliary hot water heat source device 7, so even if the capacity of the hot water storage tank 9 is reduced by that amount, the amount of hot water in the auxiliary hot water heat source device 7 is not reduced. Therefore, the capacity of the hot water storage tank 9 can be reduced, and the installation space and weight of the auxiliary hot water heat source 7 can be reduced.

In addition, since the bypass pipe 14 is provided in parallel with the hot water storage tank 9, the amount of water flowing into the hot water storage tank 9 is divided into two, and the amount of water flowing into the hot water storage tank 9 is divided into two.
Capacity can be reduced.

Furthermore, since hot water can be obtained immediately after hot water supply starts, it is not only convenient to use, but also efficient because water from the auxiliary hot water pipe 15 can be used at the same time.

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 instantaneous water heater can maintain stable ignition even when a low water volume is supplied at the outlet. is possible.

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

(1) Since the water stagnant in the 10th channel flows not only to the auxiliary hot water heat source but also to the second flow channel, 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.

(The auxiliary hot water heat source near the 2nd hot water outlet mixes and raises the temperature of the water remaining in the 10th flow path, 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. .

(3) Since the water stagnant in the first channel can be taken out separately from the second channel, the stagnant water can be reused, resulting in 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. 1... Main hot water heat source device, 2... Hot water outlet %6.
...First flow path, 7... Sub-hot water heat source device,
15...Second flow path, 17...Opening/closing valve,
22...Hot water flow control valve.

Claims (3)

[Claims] (1) A main water heater, a hot water outlet having a hot water flow control valve,
a first flow path connecting the main hot water heat source device and the hot water outlet; a sub hot water heat source device connected in the vicinity of the hot water outlet of the first flow path; the main hot water heat source device and the sub hot water heat source. A hot water supply comprising: a second flow path branching from the first flow path between the water heater and the water heater; and an on-off valve that opens and closes the second flow path depending on the temperature and flow rate of the first flow path. Device. (2) When the temperature of the first flow path exceeds a preset temperature or when there is no flow in the first flow path, the on-off valve closes the second flow path.
2. The hot water supply device according to claim 1, which closes the first flow path and opens when there is flow in the first flow path and the temperature is below a preset temperature. (3) The on-off valve includes a solenoid valve inserted in the second flow path and a first
Claims comprising: a temperature sensor that detects water temperature in a flow path; a flow rate switch provided in the first flow path; and a controller that controls opening and closing of the electromagnetic valve based on signals from the temperature sensor and the flow rate switch. Paragraph 1 or 2
Water heater as described in section.