JPH0522722Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is an instant hot water supply device that allows hot water of sufficient temperature to be used instantly in a single-pipe hot water supply system for general household use. It is related to.

(Prior art and its problems) In conventional hot water supply systems for general households, the piping system from the water heater to the hot water outlet is often of a single pipe type. In such a single-pipe water supply system, when hot water supply is started by opening the hot water outlet, the water in the pipe leading from the water heater to the hot water outlet is first discharged, and then the water is boiled by the water heater. Since the configuration is such that hot water comes out from the hot water outlet, the temperature of the water discharged from the hot water outlet changes over time as shown in Figure 5, for example.In other words, even if the hot water outlet is opened, hot water does not come out immediately. There is a problem in that the user is forced to wait, for example, 30 seconds to 1 minute before hot water at a predetermined temperature comes out.
We solved the problems with single-pipe hot water systems,
There is a double-pipe water heater that provides hot water immediately, but this method requires additional piping and hot water circulation pumps, making it large-scale and expensive to install. There is the issue of putting it away.

The present invention has been developed in view of the above points, namely, by rationally using a hot water tank equipped with an electric heater for heat retention, sufficient water can be obtained while taking advantage of the single pipe system's low equipment cost. In addition to making hot water instantly available, the hot water tap and faucet are integrated, and the hot water tank can be maintained at a pressure below the pressure specified by the Pressure Vessel Safety Regulations, making it easy to install. The purpose is to make it possible.

(Means for solving the problem) The structure of the present invention to solve the above problem is as follows.
To explain with reference to FIGS. 1 to 3 corresponding to embodiments, the water heater of the present invention includes a hot water introduction section 2,
A hot water tank 1 provided with a lead-out portion 3 is surrounded by a heat insulating material 4 and stored in the upper part of the box body A, and an electric heater 5 for heat preservation is installed.
A hot water tap 9 is provided in the inlet pipe 8 connected to the hot water inlet part 2 at the bottom of the box A, and a hot water tap 9 is provided in the outlet pipe 11 connected to the outlet part 3 in the box A. A water supply pipe 13 is connected to the water supply pipe 13, and a water supply faucet 12 provided on the water supply pipe 13 is provided at the lower part of the box A.

(Function) In the above configuration, the water heater of the present invention is installed above a place that requires instant hot water supply, such as a kitchen sink or a bathroom sink, and the introduction pipe 8 is a single-pipe system. By connecting the hot water supply pipe 16 from the water heater of the hot water supply system, connecting the water supply pipe 13 to the water pipe 17, and connecting the heat-retaining electric heater 5 to a power source, it can be put into use.

In the above state, the operation knob 18 of the hot water tap 9
When the operation is opened, hot water in the hot water supply pipe 16 flows into the introduction pipe 8.
Flows into the hot water tank 1 from the hot water tank 1.
Mix with the hot water kept inside. As the hot water in the hot water supply pipe 16 flows into the hot water tank 1 in this manner, the hot water in the hot water tank 1 is discharged from the outlet 10 of the outlet pipe 11 via the hot water tap 9. Therefore, when using the hot water pipe 16 first thing in the morning in winter,
Even if the hot water inside has already cooled down, the hot water kept in the hot water tank 1 can be used immediately as described above, and by using such hot water, the temperature of the hot water will drop to some extent. However, after all the cold water in the hot water supply pipe 16 is discharged, the hot water heated by the water heater 15 can be used.

In using hot water as described above, in this invention, the water tap 1
By operating the operation knob 2, a desired amount of water can be added to the hot water from the hot water tank 1, so it can be used in the same manner as a conventional mixing faucet.

In addition, since the hot water tank 1 is always in communication with the atmosphere via the outlet pipe 11, the pressure of water supply such as water supply is not applied to the hot water tank 1, and therefore the hot water tank 1 is always connected to the atmosphere according to the pressure vessel safety regulations. The pressure can be maintained below the specified pressure.

(Example) Next, embodiments of the present invention will be described with reference to the drawings.

First, reference numeral 1 denotes a hot water tank, and this hot water tank 1 is provided with an inlet part 2 and an outlet part 3. This hot water tank 1 is surrounded by a suitable heat insulating material 4 such as plastic foam and stored in the upper part of the box body A.
An electric heater 5 for heat retention is provided. The heat-retaining electric heater 5 may be wound around the outer periphery of the hot water tank 1 as shown in the figure, or may be immersed within the hot water tank 1 as appropriate. The heat retention electric heater 5 is controlled by a control mechanism using a temperature adjustment thermostat 6, a temperature overrise prevention thermostat 7, etc. to maintain the temperature of the hot water in the hot water tank 1 at a desired temperature. The structure is such that it is possible to do so. An introduction pipe 8 is connected to the hot water introduction section 2, and a mixing pipe 14 projects from the introduction pipe 8 into the hot water tank 1. By providing such a mixing pipe 14, the hot water introduced from the introduction part 2 and the hot water tank 1 can be mixed.
It can mix well with the hot water inside. The specific configuration of this mixing tube 14 is arbitrary. The introduction pipe 8 is provided with a hot water tap 9 corresponding to the lower part of the box body A. Further, a water supply pipe 13 is connected to the outlet pipe 1 connected to the outlet part 3 in the box body A, and a water tap 12 provided in the water supply pipe 13 is connected to the outlet pipe 1 in the box body A.
It is located at the bottom of the . Further, reference numerals 18 and 19 refer to operation knobs 20 and 19 for the hot water tap 9 and the water tap 12, respectively.
21 are a power switch and an operation indicator lamp, respectively.

In the above configuration, the water heater of the present invention is installed above a place that requires instant hot water supply, such as a kitchen sink or a washbasin, as shown in FIG. By connecting the pipe 8 to the hot water supply pipe 16 from the water heater 15 of a single-pipe water supply system, connecting the water supply pipe 13 to the water pipe 17, and connecting the electric heater 5 to a power source, the operating state can be adjusted. It can be done. The heating source of the water heater 15 of such a hot water supply system may be a combustion type, an electric heater type, or the like, and the hot water supply form may be an instantaneous type, a hot water storage type, or the like as appropriate.

FIG. 4 shows the temporal change in water temperature after the hot water tap 9 is opened by the operation knob 18 in a hot water supply system to which the above device of the present invention is applied.
Furthermore, FIG. 5 shows the temporal change in water temperature after the hot water tap is opened in a conventional single-pipe system to which the device of the present invention is not applied. In both cases, the length of the pipe from the water heater to the discharge port was 20 m, the diameter of the pipe was 12.7 mm, and the discharge rate from the discharge port was 4/min. In the device of the present invention, the capacity of the hot water tank 1 is 2, and the hot water temperature in the hot water tank 1 is 70 to 75.
It is ℃.

As is clear from the measurement results, in the conventional case, the temperature of hot water is usually used, for example, 50°C.
It takes 40 seconds for the water temperature to reach 50 degrees Celsius, whereas in the case of the present invention, the water temperature reaches 50 degrees Celsius immediately after the hot water tap 9 is opened.
It is possible to obtain water temperatures of ℃ or higher.

(Effects of the invention) As described above, the present invention is a simple system with low equipment costs that can be installed in places that require instant hot water supply, such as kitchens and washrooms, and connected to a single-pipe hot water system. Even with a pipe-type hot water system, you can use hot water at a specified temperature or higher immediately after opening the hot water tap, so even when you want to use it first thing in the morning in winter, you can use it as soon as you open the hot water tap. 30 seconds ~ 1
There is no need to wait for several minutes, and it can also be used for intermittent short-term (10 to 30 seconds) usage conditions such as hand washing. Also, the hot water in the hot water tank can be used to clean pipes and hot water supply in winter. It also has the effect of helping prevent faucets, water taps, etc. from freezing. In particular, in this invention, the hot water tank, hot water tap, faucet, etc. are integrated into the box, so it is easy to install and can be used in the same way as a conventional mixing faucet. There is an effect. Furthermore, in this invention, since the hot water tank is always in communication with the atmosphere via the outlet pipe, the hot water tank is not subjected to water supply pressure such as water supply, and therefore the hot water tank is always operated according to the pressure vessel safety regulations. This has the effect of being able to maintain the pressure below a predetermined pressure.

[Brief explanation of drawings]

FIG. 1 is an explanatory sectional view showing a configuration corresponding to an embodiment of the present invention, and FIG. 2 is a system explanatory diagram showing a configuration corresponding to an embodiment in which the device of the present invention is incorporated into a single-pipe hot water system. FIG. 3 is an explanatory external view corresponding to an embodiment of the installation of the apparatus of the present invention, and FIGS. 4 and 5 are explanatory diagrams showing an example of the hot water supply operation of the present invention and the conventional method, respectively. Symbol A...Box body, 1...Hot water tank, 2...Introduction part, 3...Output part, 4...Heat insulation material, 5...Electric heater for heat retention, 6...Thermostat for temperature adjustment, 7... ...Thermostat for preventing excessive temperature rise, 8...
...Introduction pipe, 9...Hot water tap, 10...Discharge port, 11
... Outlet pipe, 12 ... Water tap, 13 ... Water supply pipe,
14...Mixing pipe, 15...Water heater, 16...Hot water supply pipe, 17...Water pipe, 18, 19...Operation knob, 20...Power switch, 21...Operation display lamp.

Claims (1)

[Scope of utility model registration request] A hot water tank with a hot water inlet and a hot water outlet is surrounded by heat insulating material and stored in the upper part of the box body, an electric heater for heat retention is provided, and a hot water tap provided in an inlet pipe connected to the hot water inlet is connected to the box. It is characterized in that a water supply pipe is connected to the outlet pipe connected to the outlet part in the lower part of the body, and a water supply tap provided to the water supply pipe is provided in the lower part of the box body. Water heater.