JPS5942205B2 - water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water heater that supplies hot water from a water heater to a bath, sink, etc.

Generally, when hot water is supplied from a water heater, hot water of about 85℃ is used for the bath, hot water of about 40℃ is used for the shower, hot water of about 30℃ is used for the sink, and hot water of about 80℃ is used for finishing dishes. It is necessary to supply hot water.

In other words, the places where hot water is supplied are divided into places that require hot water at a temperature of about 80°C to 85°C, places that require hot water at a lower temperature than this high temperature, and places that require hot water of both types. Can be divided.

By the way, in conventional equipment, high-temperature water is piped from a single water heater that stores hot water of about 85 degrees Celsius to the areas that require hot water supply, such as baths, showers, and kitchens. On the other hand, water is led to the above-mentioned rung section through a water conduit, and when hot water is used, the opening of the runn is adjusted so that the hot water reaches a predetermined temperature, and the high-temperature hot water and water are mixed in this runout section. I was using it.

For this reason, it was extremely difficult to operate to obtain the desired water temperature.

This invention was made in view of the above-mentioned drawbacks, and although hot water is supplied from a single water heater, it is possible to supply high-temperature hot water (e.g., about 80°C) with a simple operation such as a cock. To provide a water heater that can easily obtain hot water at a lower temperature.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

For convenience of explanation, a case will be described in which hot water is supplied to a washroom that requires hot water at a low temperature of 30° C. to 40° C. and a sink that requires hot water at a high temperature of about 80° C. in addition to this low temperature hot water.

That is, in the figure, 1 is a water heater, which has a heating device (not shown) at the bottom, a hot water outlet 1A at the top, and a water supply port 1B at the lower side wall.

Due to the operation and action of the heating device and the heat insulating material (not shown) provided on the outer surface of the water heater, the interior of the water heater 1 is constantly kept at a high temperature of about 85 degrees Celsius, except when hot water is used and immediately after use. It is stored full of hot water.

2A and 2B are hot water supply pipes with one end connected to the hot water outlet 1A of the water heater 1, and are installed near the hot water supply locations of the washroom 8 and the sink 12, respectively.

3 is a return pipe whose one end is connected to the water supply port 1B of the water heater 1 and the other end is connected to the second heat exchanger 7B; 4 is a circulation pump installed in the return pipe 3; The hot water is circulated through outlet 1A, hot water supply pipe 2A, first heat exchanger T, hot water supply pipe 2B, second heat exchanger 11, return pipe 3, and water supply port 1B.

Reference numeral 5 denotes a water pipe connected to a water source, which is connected via a pressure reducing valve 6 to the return pipe 3 section between the water supply port 1B and the circulation pump 4, and is also connected to the first and second heat exchanger from the middle of the pipe. It is guided by the 7°11 part of the vessel.

7 is a hot water supply pipe 2A, 2 installed near a washroom 8, which is a hot water supply place that requires hot water at a low temperature of about 30°C to 40°C.
The first heat exchanger is provided between the heat exchanger outer shell 7A and the heat exchanger outer shell IA, as shown in detail in FIG. It is composed of a part of the water pipe 5.

Note that one end of the heat exchanger outer shell IA is connected to the hot water supply pipe 2A, and the other end is connected to the hot water supply pipe 2B.

Moreover, the heat conversion efficiency of this first heat exchanger 7 is as follows:
The hot water is designed to be as low as 40 degrees Celsius.

A hot water supply pipe 9 is integrally connected to the water pipe 5 led out from the heat exchanger outer shell 7A, and is piped to the washroom 8.

10 is a cock provided at the end of this hot water pipe 9, 11 is 30
A second pipe installed between the hot water supply pipe 2B and the return pipe 3 installed near the sink 12, which is a place that requires hot water at a low temperature of about °C to 40 °C and a high temperature of about 80 °C. In the heat exchanger, as shown in detail in FIG. 3, a heat exchanger outer shell 11A and a part of the water pipe 5 inserted into the heat exchanger outer shell 11A and led out to the outer shell 11A again. It is configured.

Note that one end of the heat exchanger outer shell 11A is connected to the hot water supply pipe 2B, and the other end is connected to the return pipe 3.

Further, the heat conversion efficiency of the second heat exchanger 11 is also taken into consideration so that the water becomes hot water at a low temperature of about 30° C. to 40° C., similarly to the first heat exchanger 7.

Reference numeral 13 denotes a hot water supply pipe connected to the outer shell 11A of the second heat exchanger 11 through which hot water passes, and is led to the sink 12.

14 is a cock provided at the end of this water supply pipe 13; 15;
is a hot water supply pipe connected to the water pipe 5 led out from the outer shell 'flA of the second heat exchanger 11, and led to the sink 12.

16 is a cock provided at the end of the hot water supply pipe 15, and 17 is a safety valve.

The apparatus according to the present invention is constructed as described above, and the interior of the water heater 1 is currently filled with hot water at a temperature of about 85°C.

In this state, if you open the faucet 10 in the washroom 8,
The circulation pump 4 is driven, and the high temperature hot water in the water heater 1 is transferred from the hot water outlet 1A to the hot water supply pipe 2A to the first heat exchanger 7 to the hot water supply pipe 2B.
- Circulated through the second heat exchanger 11 - return pipe 3 - water inlet 1B.

Since the first heat exchanger 7 is connected to the hot water pipe 9 in which the cock 10 is installed, the first heat exchanger 7
The high-temperature hot water that enters the water pipe 5 gives heat to the water pipe 5, and the water in the water pipe 5 reaches a predetermined temperature (30°C to 40°C in this example).
℃) to have a predetermined hot water temperature, and this hot water is supplied to the washroom 8.

The hot water that has undergone heat exchange has a lower temperature and enters the lower part of the water heater 1 through the hot water pipe 2B, the second heat exchanger 11, the return pipe 3, and the water supply port 1B, and the hot water in the water heater 1 reaches a specified level. If the temperature is below , the heating device operates and heats the water until the water is hotter than the bottom of the water heater 1.

Note that before the cock 10 is opened, the circulation pump 4 may already be activated and hot water may be circulating.

Furthermore, when the low-temperature side condenser 14 provided in the sink 12 is opened, the circulation pump 4 is driven as described above, and the high-temperature hot water in the water heater 1 is circulated.

Since the second heat exchanger 11 is connected to the hot water pipe 13 in which the cock 14 is installed, the high temperature hot water that has entered the second heat exchanger 11 is mixed with water in the same manner as above. The water was then heated to a specified temperature (30°C to 40°C in this example).
℃) to have a predetermined hot water temperature, and this hot water can be supplied to the sink 12.

Note that the hot water whose temperature has been lowered through heat exchange enters the water heater 1 in the same manner as described above.

If the cock 16 on the high temperature side of the sink 12 is opened, hot water can be supplied to the sink 12 through the hot water outlet 1A, the hot water supply pipe 2A, the first heat exchanger 7, the hot water supply pipe 2B, and the hot water supply pipe 15.

In this case, the amount of hot water in the water heater 1 decreases, but that amount of water is immediately supplied through the water pipe 5 and the water supply port 1B, and the heating device operates to heat the hot water in the water heater 1 until it reaches a high temperature. do.

Note that when using low-temperature hot water in the washroom 8 and high-temperature hot water in the sink 12 at the same time, the temperature of the hot water flowing into the second heat exchanger 11 decreases, and the temperature of the hot water supplied to the sink 12 decreases slightly. Although it decreases, there is no problem in actual use.

In addition, when low-temperature hot water is used in the washroom 8 and the sink 12 at the same time, the temperature of the hot water flowing into the second heat exchanger 11 decreases, but in consideration of this temperature decrease, the second heat exchanger Since the heat conversion efficiency of the vessel 11 is taken into consideration, there is no problem in practical use.

In the above embodiment, the hot water supply pipes 2A, 2B, etc. may be filled with materials that have a heat insulating effect and a heat transfer effect.In addition, in order to obtain hot water, the hot water supply pipe 15 is connected to the second heat exchanger 11.
However, if you connect it to water heater 1 or hot water pipe 2A,
Even when low-temperature hot water is used in the washroom 8, high-temperature hot water at a substantially constant temperature can always be obtained.

Furthermore, the water led from the water pipe 5 is made into low-temperature hot water and this hot water is supplied to the washbasin PJT 8 and the sink 12. It may be converted into hot water and supplied.

Further, in the above embodiment, for convenience of explanation, the case where hot water is supplied to the washroom 8 and the sink 12 has been described, but hot water can also be supplied to a bath, shower, etc. in the same manner as described above.

As described above, according to the present invention, although hot water is supplied from a single water heater, hot water at a desired temperature can be easily obtained by simple operations such as using a cock.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a sectional view showing details of the first heat exchanger in FIG. 1, and FIG. 3 is a cross-sectional view of the second heat exchanger in FIG. 1. It is a sectional view showing details. Note that the same symbols in the figures indicate the same parts, 1 is a water heater, 2A is
, 2B, 9, 13.15 is a hot water pipe, 3 is a return pipe, 5 is a water pipe, 7 is a first heat exchanger, 8 is a washroom, 10, 14,
16 is a cock, 11 is a second heat exchanger, and 12 is a sink.

Claims (1)

[Claims] 1. A water heater, connected to this water heater, and leading the high temperature hot water inside the water heater to the outside of the water heater (a hot water supply pipe, a heat exchanger installed in this water supply pipe, and a heat exchanger that converts the hot water into heat in this heat exchanger). Further, a hot water supply device comprising a hot water supply pipe that leads hot water at a temperature lower than the high temperature hot water to a desired hot water supply location, and a hot water supply pipe that leads the high temperature hot water to the desired hot water supply location.