JPS6314268B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a low combustion type (for example, an input of 5000~
(about 10,000ml/h) and large quantities (for example, about 200 or more)
This product relates to a hot water storage type water heater that stores hot water at a high temperature of 100 to 200 m.In addition to the basic performance of a hot water storage type water heater, which is to obtain a large amount of high-temperature hot water, it also has a simple structure that allows it to store hot water in small amounts (for example, 40 to 50 mm) at a uniform temperature. The aim is to be able to obtain this in a short period of time (for example, around 30 minutes).

First, a conventional example will be explained with reference to FIGS. 3 to 6. In FIG. 3, 1 is a burner and 2 is a fin type heat exchanger. The burner 1 and the fin-type heat exchanger 2 are surrounded by a case 3, which is installed on the lower side of the can 7. An exhaust pipe 4 is provided at one end of the case 3, and a fan 5 and an exhaust top 6 are provided at the tip. One end of the heat exchanger 2 is a water supply port 8,
It is connected to the lower part of the can body 7. The other end of the heat exchanger 2 is connected to a hot water supply port 12 via a hot water supply port 9 and a separate hot water supply pipe 10, and a switching valve 11 is provided in the middle of the pipe. Note that the hot water supply port 9 is located in the can body 7.
It is located below the middle of the hot water supply port 12 and at the top of the can body 7, and the direction of supply of high-temperature hot water from the heat exchanger 2 can be controlled by operating the switching valve 11. Reference numeral 13 denotes a tap hole provided at the top of the can body 7. Temperature detectors 14 and 15 detect the temperature of the water inside the can body 7 and control the burner 1 to turn on or off.

In the above configuration, a combustion flame is first formed in the burner 1 and heats the fin type heat exchanger 2.
Now, the water in the can body 7 enters the heat exchanger 2 through the water supply port 8, where it is exchanged with combustion heat and its temperature rises.
The warmed water has a lower specific gravity and a draft effect acts on it, causing it to rise. If the entire water in the can body 7 is to be heated, the switching valve 11 may be operated to introduce high-temperature hot water into the hot water inlet 9 from the vicinity of the hot water inlet 9 provided below the middle of the can body 7. The water present in the upper part and the hot water from the heat exchanger 2 are heat exchanged and mixed to obtain uniform hot water. This large amount of hot water with uniform temperature is effective for hot water supply to baths, showers, etc. However, the temperature of the hot water located below the hot water supply port 9 is somewhat low because heat transfer is insufficient. Furthermore, storage-type water heaters require relatively little input and can store a large amount of hot water, so it takes about 2 to 3 hours to boil the water.
It also had the disadvantage of requiring continuous combustion for ~3 hours. Furthermore, the response to cases where hot water was used up in a short period of time and there was a shortage of hot water, or cases where the water was not boiling because the user had forgotten to turn on the switch was extremely inadequate.

In order to compensate for this drawback, as a method of obtaining high-temperature hot water in a small amount in a short time, it is sufficient to operate the switching valve 11 and introduce high-temperature hot water to the hot-water supply port 12 via the hot-water supply pipe 10. The water present above the vicinity of the hot water supply port 12 is heated intensively, and the temperature of the water rises.

Here, attention is paid to the vicinity of the upper hot water supply port 12 of the can body 7. In FIG. 3, the high-temperature hot water (arrow) rising inside the hot water supply pipe 10 has a low flow velocity, so a large proportion of the hot water moves upward along the wall surface of the can 7. Therefore, there was unevenness in heat transfer to the surroundings, and there was a tendency for the water temperature to be high in the upper part of the can body 7 and to become lower as it goes to the lower part. For this reason, even if hot water is obtained in a short period of time, there will be a large temperature difference between the top and bottom, making it difficult and uncomfortable to adjust the temperature during a practical shower. This has the disadvantage of increasing heat radiation loss, which is disadvantageous in terms of economy. Figure 5 shows can body 7.
It shows the temperature rise value at points A and B in Figure 3 inside.
It can be seen from this figure that the temperature difference increases. The present invention provides a can body having a spout, a heating device for heating water in the can body, one outlet connected to a heated water outlet side of the heating device and communicating with a lower part of the can body, and the can body. a switching valve that switches the other outlet communicating with the hot water supply pipe extending upward; and a switching valve that communicates with the hot water supply pipe and is installed horizontally in the middle or upper part of the can body, and that extends downward in the longitudinal direction of the can body. The drawbacks of conventional hot water storage type water heaters are solved by providing a hot water outlet pipe with a hot water supply hole along the length of the hot water supply hole, and one embodiment thereof will be described below with reference to the accompanying drawings. Note that the same parts as in FIG. 6 are given the same numbers. In FIG. 1a and FIG. 2, 10 is a hot water supply pipe, which is connected to a hot water supply port 12. In FIG.
Furthermore, as an extension of the hot water supply pipe 10, a plurality of small holes 10B (used as an example of a hot water supply port) are provided on the bottom surface.
A hot water tap pipe 10A provided with a hot water supply pipe 10A is fixed to the hot water supply port 12 and protrudes into the can body 7. Note that the hot water tap pipe 10A is located 40 to 50 points from the hot water tap 13. The plurality of small holes 10B are all in the can body 7.
It is opened towards the bottom. In addition, 14,1
5 is a temperature sensor.

The operation of one embodiment of the present invention in the above configuration will be explained.

If you want to obtain a small amount of high-temperature water in a short time, use switching valve 1.
1, the high-temperature hot water that has passed through the hot water supply pipe 10 is transferred to the hot water outlet pipe 1 in the can body 7.
Hot water is discharged from a plurality of small holes 10B provided in 0A into the water above the can body 7, and heat exchange is performed with each other. The hot water whose temperature has increased due to heat exchange in the vicinity of the plurality of small holes 10B moves to the upper part of the can body 7, and in the process of moving, heat exchange is also performed with surrounding water. Now, in one embodiment of the present invention, a plurality of small holes 10B are opened toward the bottom of the can body 7, so that high-temperature hot water flows through one small hole along the circumference of the tap pipe 10A, as shown in FIG. Hot water is dispensed from 10B in two parts. In this way, the finely divided high-temperature hot water and the water (40 to 50) in the upper part of the can body 7 exchange heat evenly and uniformly, so that the temperature distribution becomes more uniform. Note that the larger the diameter of the tapping pipe 10A (the larger the heat transfer area), the more uniformity is promoted. FIG. 4 shows the temperature rise values at points A and B inside the can body 7 in FIG. 2 of an example product of the present invention, and as is clear from the comparison with FIG. You can see that you can get less hot water. At this time, when the temperature of the hot water detected by the temperature sensor 15 reaches a predetermined value, combustion in the burner 1 is stopped.

In addition, in this embodiment, when obtaining a large amount of high-temperature hot water, the switching valve 11 is
The hot water is supplied from the hot water supply port 9, and the temperature sensor 1
When the hot water temperature detected by 4 reaches a predetermined value, combustion in the burner 1 is stopped.

Next, in the embodiment shown in FIG. 1a, if the entire interior of the can body 7 is heated to obtain a large amount of hot water, multiple small holes 9B are provided on the bottom surface as an extension of the hot water supply port 9 as shown in FIG. 1b. It is sufficient to provide a hot water tap pipe 9A.

According to this configuration, the switching valve 11 is operated to introduce high-temperature hot water to the hot water supply port 9, and the plurality of small holes 9
By discharging hot water from B in the same manner as described above, the temperature of the hot water becomes uniform in the vicinity of the hot water tap 9A.In this case, if the position of the hot water tap 9A is placed as far down as possible below the can body 7, more hot, uniform hot water can be obtained. Can be done.

In addition, as another example, as a saving specification, approximately 100
If it is desired to obtain high-temperature hot water before and after, the hot water tap pipe 9A may be placed approximately in the middle of the can body 7, as shown in FIG. 1c. Note that 16 is a temperature sensor that operates at this time and performs the same function as 14 and 15 above. Further, 17 is a saving switching valve. In this case, the switching valve 11 and the saving switching valve 17 are operated to introduce high-temperature hot water into the hot water tap pipe 9A in the can, and the hot water (approximately 100
(before and after) to make them uniform.

In the above embodiment, a small hole is used as the hot water supply port, but it may be a long hole, a slit, etc., and it is not necessary that all the holes open downward.

As described above, the present invention not only allows a large amount of hot water to be obtained, but also has a hot water tap connected to the switching valve via a hot water supply pipe installed horizontally in the upper or middle part of the can body, and a hot water tap connected to the bottom of the can body. Since the hot water supply hole is provided along the longitudinal direction of the hot water supply hole, the hot water that flows downward from the hot water supply hole is diverted to the hot water outlet pipe.
Since the water rises in parts, it evenly exchanges heat with the water inside the can, making the temperature of the water more uniform, and making it possible to obtain a small amount of hot water in a short period of time.

[Brief explanation of the drawing]

1a to 1c are sectional views of a hot water storage type water heater according to an embodiment of the present invention, and FIG. 2 is a sectional view of a hot water storage type water heater according to an embodiment of the present invention, and FIG.
Fig. 3 is a cross-sectional view of the upper part of the can body of the conventional example, Fig. 4 is a characteristic diagram showing the temperature distribution in the upper part of the can body of Fig. 1 a, and Fig. 5 is a cross-sectional view taken along lines A to B of FIG. 6 is a characteristic diagram showing the temperature distribution in the upper part of a conventional can body, and is a partially cutaway front view of a conventional hot water storage type water heater. 1... Burner, 2... Heat exchanger, 9... Hot water supply port, 9A, 10A... Hot water outlet pipe, 9B, 10B
...Small hole, 10...Hot water pipe, 11...Switching valve, 12...Hot water inlet.

Claims (1)

[Claims] 1 A can body having a tap water outlet, a heating device that heats water in the can body, one outlet connected to the heated water outlet side of the heating device and communicating with the lower part of the can body, and an upper part of the can body. a switching valve for switching the other outlet communicating with the hot water supply pipe extending to the hot water supply pipe; and a switching valve that communicates with the hot water supply pipe, is installed horizontally in the middle or upper part of the can body, and is formed along the longitudinal direction of the can body toward the bottom. A hot water storage type water heater consisting of a hot water outlet pipe with a hot water supply hole.