JP2000249403A - Hot water supply tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mix heat source water and makeup water in a mixing tube so as not to permit chilled water to directly enter into a hot water supply tank by providing a heat source water tube in the hot water supply tank, arranging the mixing tube at the heat source water tube in the hot water supply tank, externally providing a makeup water tube to the hot water supply tank and connecting the tip of the make-up water tube to the mixing tube. SOLUTION: A heat source water tube 2 which is connected to a boiler from a hot water supply tank 1 is made down in the tank 1, while providing a U-shaped mixing tube 3 to the heat source water tube 2. Further, a makeup water tube 4 is inserted to the tank 1 from outside of the tank 1 to connect the end of the makeup water tube to the mixing tube 3. Desirably, this connecting position should be disposed at a little higher than the tip of the heat source water tube 2 in the mixing tube 3. In this way, water supply can be readily conducted without imposing a load on a water supply side. Further, the diameter of the U-shaped mixing tube 3 favorably should be the equivalent to the sum of the radial sectional areas of the heat source water tube 2 and the make-up water tube 4. Furthermore, the position of the tip of the mixing tube 3 should be disposed a little lower than the tip of the heat source water tube 2 and a bonding position of the makeup water tube 4, so that hot water can be readily discharged to the hot water tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water tank, and more particularly, to a hot water tank in which a tip end of a supply water pipe is joined to a mixing pipe.

[0002]

2. Description of the Related Art A conventional hot water tank is filled with water from the lower part of the hot water tank, the water is taken out from the lower part, heated through a boiler by a circulation pump, and the heated water is returned to the upper part of the hot water tank. It was that. Therefore, the temperature of the water in the hot water tank was gradually increased by repeating the above operation, and the hot water pushed upward by utilizing the specific gravity difference was provided with a hot water supply pipe at the top of the hot water tank, and the hot water was taken out from the hot water pipe and supplied. . The conventional concept of hot water supply equipment is based on the principle of three-layer separation in which hot water rises and cold water gathers at the bottom, and a temperature sensor is attached to the middle part of the hot water tank 1 to control the temperature. The upper part has a higher temperature and the lower part has a lower temperature. Accordingly, in order to achieve the purpose of supplying constant temperature hot water, it is necessary to increase the volume of the hot water tank itself since a preliminary structure must be secured. In addition, since make-up water and heat source water are discharged directly into the hot water tank, make-up water and heat source water do not mix completely, and there is always a temperature difference, and on the contrary, the temperature difference has been used. It is a conventional hot water supply system.

[0003]

As described in the prior art, since the conventional hot water supply tank is based on the concept of three-layer separation, the capacity of the hot water supply tank must be increased. Was. Also, since the heat source water from the boiler and the make-up water from the make-up water pipe are discharged directly into the hot water tank, the heat source water and make-up water do not mix completely, and it takes a long time for the overall temperature to be somewhat uniform, They also needed a lot of energy. In addition, when a large amount of hot water is used temporarily, low-temperature hot water having a temperature difference comes out of the currant or the like, which often causes discomfort and inconvenience. In addition, there is a problem that oxygen in the water and in the hot water supply tank is circulated to the entire equipment in order to take out hot water from the uppermost part. To prevent this, an expensive steam-water separator must be provided in the middle of the pipe to separate oxygen. did not become. However, even with this steam separator, there was a problem that oxygen could not be completely treated due to the flow rate. The present invention has been developed from the experience of dealing with hot water tanks for many years in order to eliminate the above problems of the prior art at a stretch.The heat source water pipe and the makeup water pipe are extended and drawn into the tank,
Further, it is an object of the present invention to provide a hot water supply tank having a structure in which a heat source water (pipe) and a makeup water (pipe) are mixed in the mixing pipe before the discharge pipe is provided in the mixing pipe so that cold water is not directly put into the tank. And

[0004]

Means for Solving the Problems In order to achieve the above object, the hot water tank of the present invention has the following configuration.

In a hot water tank connected to a boiler for hot water supply, a heat source water pipe (2) falls from the upper part of the hot water tank (1) into the hot water tank (1) and penetrates the same, and a heat source water pipe (2) in the hot water tank (1) is provided. And a make-up water pipe 4 penetrates the hot water supply tank 1 from outside.
Are joined to appropriate positions of the mixing tube 3.

[0005]

2. A hot water supply tank according to claim 1, wherein the supply water pipe in the hot water supply tank is formed in a substantially U-shape and connected to form a meandering supply water supply pipe.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a heat source water pipe 2 connected to a boiler from the upper part of a hot water tank 1 is lowered into the hot water tank 1 and penetrated therethrough. A substantially U-shaped mixing tube 3 is covered. Further, a replenishing water pipe 4 is penetrated from the outside of the hot water tank 1 into the hot water tank 1, and a tip end thereof is joined to an appropriate position of the mixing pipe 3. Therefore, the makeup water mixes well with the heat source water in the mixing pipe 3 to become hot water, and is stored in the hot water tank 1. Therefore, the temperature difference of the hot water in the hot water tank 1 is extremely small. Since there is no difference in temperature between the hot water in the hot water supply tank 1, even if a large amount of hot water is supplied, low-temperature water does not come out to cause discomfort. Therefore, the entire amount of hot water at the required temperature can be efficiently secured, so that unnecessary portions can be cut and the volume of the hot water supply tank 1 can be reduced. Further, since there is no unevenness in the hot water in the hot water supply tank 1, the temperature of the hot water can be raised in a short time, and waste of energy can be eliminated.

[0007]

An embodiment will be described with reference to the drawings. FIG.
1 is a partially cutaway front view showing an embodiment of the present invention. In the hot water supply tank 1 according to the present invention, a heat source water pipe 2 connected to a boiler from the upper part of the hot water supply tank 1 is lowered into the hot water supply tank 1 and penetrated therethrough. The mixing pipe 3 having a U-shape is covered. Further, the refill water pipe 4 is connected to the hot water tank 1
The hot water supply tank 1 is penetrated from the outside, and its front end is joined to an appropriate position of the mixing pipe 3. This joint is preferably
A slightly upper position is better than the position of the tip end of the heat source water pipe 2 in the mixing pipe 3. This makes it easier for the water to flow in without imposing a load on the water supply side. It is desirable that the diameter of the substantially U-shaped mixing pipe 3 be equivalent to the sum of the cross-sectional areas of the diameters of the heat source water pipe 2 and the replenishing water pipe 4. Is the tip port of the heat source water pipe 2 and the makeup water pipe 4
Slightly lower than the joining position, it is easy to release and discharge the hot water into the tank. In addition, small air vent holes 9 and 9 are provided in the upper part of the mixing pipe 3, and drain holes 10 and 10 are also provided in the lower part of the mixing pipe 3 and the substantially U-shape to improve the flow of flowing water in the pipe. It is. Further, an air vent valve 8 is provided at the upper part of the hot water tank 1, a circulating water outlet pipe 6 that can be connected to a boiler by piping is provided at a lower part of the hot water tank 1, and a hot water outlet pipe 7 is provided at a side part of the hot water tank 1.

FIG. 2 is a front view of the mechanism of the present invention. As clearly shown in the front view of the present mechanism, the present invention is constituted by the following two circulation systems. The first circulation system is boiler 1
The heat source water heated in 1 enters the mixing pipe 3 from the upper part of the hot water tank 1 through the heat source water pipe 2 penetrating into the hot water tank 1,
The water mixes with make-up water in the mixing pipe 3, and hot water is supplied to the hot water tank 1.
The hot water is discharged into the system and is returned to the boiler 11 through the circulating water outlet pipe 7 at the lower part of the hot water supply tank 1 until the temperature reaches the set temperature. Second
When hot water is supplied, hot water in the hot water supply tank 1 flows out of the hot water supply outlet pipe 7 into the hot water supply curan, and excess hot water passes through a pipe connected to the makeup water pipe 4. This is a system in which the hot water enters the hot water tank 1 together with the make-up water, flows into the mixing pipe 3, becomes hot water, and is stored in the hot water tank 1. The above-mentioned systems are forcibly supplied with water by circulating pumps 12 and 12 in the middle of each pipe.

The present invention is configured as described above,
At the start of boiling, the water in the hot water tank 1 is drawn into the boiler 11 from the lower part of the hot water tank 1 by a circulation pump, and heated through the boiler 11. The heated heat source water is discharged from the distal end of the heat source water pipe 2 into the mixing pipe 3. At this time, the mixed heat with the makeup water flowing from the makeup water pipe 4 becomes hot water. This hot water is discharged to the upper part of the hot water supply tank 1 along the substantially U-shaped mixing pipe 3 by the circulating pump pressure. The hot water discharged into the upper part of the tank travels along the tank wall to the circulating water outlet pipe 6 at the lowermost part. At this time, an efficient convection / stirring action occurs in the entire hot water tank 1, and the air taken into the hot water tank 1 is discharged out of the hot water tank 1 from an air release valve 8 attached to the uppermost portion of the hot water tank 1. Therefore, the deoxidizing action is effectively performed, and not only the generation of scale due to the oxidizing action can be suppressed, but also the durability of the hot water tank 1 can be further improved. Also, it is not necessary to attach a steam separator in the middle of the pipe. This operation is repeated until the set temperature of the temperature sensor attached near the hot water supply outlet pipe 7 is reached, and when the set temperature is reached, the circulation pumps 12, 12
Stops.

[0010] With such a configuration of the present invention, since the tip end of the makeup water pipe 4 is joined to the mixing pipe 3, the makeup water is mixed well with the heat source water in the mixing pipe 3 to become hot water, and becomes a hot water tank. 1 is stored in the hot water. Therefore, the temperature difference of the hot water in the hot water supply tank 1 can be extremely small. Since the hot water in the hot water tank 1 does not have a temperature difference, even if a large amount of hot water is supplied, low-temperature water does not come out to cause discomfort and inconvenience. Therefore, since the entire amount of hot water at a required temperature can be efficiently secured, unnecessary portions can be cut, and the volume of the hot water supply tank 1 can be reduced. Further, since there is no unevenness in the hot water in the hot water supply tank 1, the temperature of the hot water can be raised in a short time, and waste of energy can be eliminated. Energy cost is about 2
It is reduced by about 30%.

FIG. 3 is a front view of the second embodiment. In this embodiment, the supply water pipe 4 in the hot water tank 1 is substantially U
The meandering shape supply water pipe 5 is formed by connecting those formed into a V-shape.
It was formed as According to this embodiment, since the meandering-shaped makeup water pipe 5 is provided in the hot water supply tank 1, the makeup water in the meandering-shaped makeup water pipe 5 is warmed by surrounding warm water.
Since the warmed makeup water mixes with the heat source water in the mixing pipe 3, higher-temperature hot water can be obtained in a short time.
Therefore, in this embodiment, the effect of the first embodiment can be further increased and amplified.

[0012]

The present invention is configured as described above,
Since the heat source water and the makeup water are mixed more quickly, the following effects are obtained. 1. The temperature difference of the hot water in the hot water tank can be made extremely small. 2. Continuous use of hot water supply is possible, and there is no shortage of hot water. 3. Hot water tank 1 and the boiler can be made small. 4. The energy cost can be reduced by about 20 to 30%, and energy can be saved. 5. Since the structure is such that air does not easily enter the hot water tank, not only is it difficult for the scale to accumulate, but also the durability of the hot water tank is improved. 6. In the case of using the meandering replenishing water pipe, the above-mentioned effect is more exhibited.

[0013]

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing one embodiment.

FIG. 2 is a front view of the mechanism of the present invention.

FIG. 3 is a front view of the embodiment according to claim 2;

[Explanation of symbols]

 (1) is a hot water tank (2) is a heat source water pipe (3) is a mixing pipe (4) is a makeup water pipe (5) is a meandering makeup water pipe (6) is a circulating water outlet pipe (7) is a hot water outlet pipe (8) Is a vent valve (9) is a vent hole (10) is a drain hole (11) is a boiler (12) is a circulation pump

Claims (2)

[Claims] In a hot water tank connected to a boiler for hot water supply, a heat source water pipe (2) is provided from the upper part of the hot water tank (1) and penetrates into the hot water tank (1). U-shaped mixing pipe (3) for the heat source water pipe (2)
And a supply water pipe (4) penetrated through the hot water tank (1), and a tip end of the supply water pipe (4) was joined to an appropriate position of the mixing pipe (3). . 2. A hot water supply tank according to claim 1, wherein the supply water pipe (4) in the hot water supply tank (1) is formed in a substantially U-shape and connected to form a meandering supply water pipe (5). .