JPH04369345A - Hot water feeder - Google Patents

Abstract

PURPOSE:To provide a hot water feeder having a high-efficient mixing tank structure to prevent the occurrence of after-boiling right after the feed of hot water, in a hot water feeder mainly for a domestic use using petroleum and gas as a heat source. CONSTITUTION:A mixing tank 12 is located between the outlet part of a heat exchanger 2 and a hot water feed port 4. A partition plate 15 is located in the mixing tank to divide the interior thereof into mixing chambers 12a and 12b and a hot water income pipe 13 on the inlet side and a hot water outgoing pipe 14 on the outlet side are projected in the mixing tank. The opening directions of a hot water income pipe opening part 13a and a hot water outgoing pipe opening 14b are different from each other approximately in a 90 deg. arc with a hot water flow direction and extended in an opposite direction to each other. An opening is formed facing the wall surface of the mixing tank 12 to improve the mixing effect of hot water. This constitution causes hot water produced by after-boiling to be well mixed in the mixing tank, ensures feed hot water having a stable proper temperature, and provides a hot water feeder which is provided with small capacity mixing tank and formed in a compact state and improves facility.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater that uses oil or gas as a heat source and is mainly used for home use.

0002

2. Description of the Related Art A conventional water heater has a structure in which a heat exchanger 2 is provided above a burner 1, as shown in FIG. It has become. If the capacity of the heat exchanger 2 is small, the amount of heat held by the burner 1 and the heat exchanger 2 after combustion stops will cause the hot water in the heat exchanger 2 to be post-boiled, and if the hot water is used immediately after hot water is tapped, There is a danger that hot water may come out and cause burns.

In order to prevent this, the upper part of the cylindrical tank is connected to the outlet part 5 of the heat exchanger 2, and the lower part is connected to the hot water supply port 4.
A mixing tank 6 is connected to the hot water (usually 60°C or higher) that comes out of the heat exchanger 2 by post-boiling.
and the appropriate temperature water (around 40℃) in the mixing tank 6, so that the water does not become hotter than the appropriate temperature water by 10℃ or more.
The configuration was such that after-boiling was reduced using a large-capacity mixing tank 6.

0004

[Problems to be Solved by the Invention] In such a conventional mixing tank configuration of a water heater, hot water that comes out of the heat exchanger by post-boiling enters from the upper part of the mixing tank 6, and the water at an appropriate temperature in the mixing tank 6 enters the mixing tank 6. Mixing is only carried out in a narrow area at the top of the inlet, and the entire mixing tank is not sufficiently stirred, and before the hot water mixes with the suitable temperature water in the lower part, the suitable temperature water in the lower part of the mixing tank 6 is sequentially pushed out by water pressure. Due to this configuration, mixing of hot water and moderate temperature water is poor. In order to avoid hot water that is 10℃ or more higher than the appropriate temperature, even in a domestic water heater, the amount of canned water (about 0.3 to 0.5 liters) in the heat exchanger should be 3 to 4 times (approximately 1 This requires a large mixing tank (approximately 2 liters), which poses the problem of increasing the size and cost of the product.

[0005] Also, when using the hot water first thing in the morning, the hot water heated to an appropriate temperature by the heat exchanger enters the mixing tank, mixes with the cold water in the upper part, and sequentially pushes out the cold water in the mixing tank. The appropriate temperature water will not come out until the cold water in the tank and the lukewarm water mixed together have finished coming out.
Large-capacity mixing tanks have problems such as it takes time to produce hot water at the appropriate temperature, and water is wasted unnecessarily, making it uneconomical.

The present invention solves these conventional problems, and improves the mixing of hot water and suitable temperature water by post-boiling, and uses a small-capacity mixing tank to provide an inexpensive, economical, and easy-to-use product. The purpose is to provide water heaters.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a mixing tank consisting of a plurality of mixing chambers communicating with each other, and the tips of a hot water inlet pipe on the inlet side and a hot water outlet pipe on the outlet side of the mixing tank. part protrudes into the mixing tank, and the opening direction of the hot water inlet pipe and hot water outlet pipe is approximately 90 degrees parallel to the hot water flow direction.
0° direction and facing each other in opposite directions,
An opening is provided facing the mixing tank wall.

[0008]

[Function] According to the above-described structure, the hot water from the inlet pipe of the mixing tank is sequentially stirred and mixed with internal hot water in a plurality of mixing chambers of the mixing tank by post-boiling, and when the hot water is discharged from the outlet of the hot water pipe. The temperature of the water is close to the ideal temperature, which prevents dangers such as boiling water coming out of the hot water supply spout and causing burns. Then, as the hot water passes through each mixing chamber, it diffuses from the wall surface into the interior, creating a turbulent flow, so that sufficient mixing occurs, and good mixing can be achieved with a small-capacity mixing tank. In addition, even when using it from a cold time, you can use the appropriate temperature water in a short time.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A water heater according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a water heater, and FIG. 2 is a sectional view of a mixing tank section. An instantaneous heat exchanger 2 is provided above the burner 1 and is configured to convert water supplied from a water supply port 3 into hot water, which is then supplied from a hot water supply port 4. The heat exchanger 2 consists of a heat exchange section 7 that heats water with the combustion heat of the burner 1 and a drum 9 that forms a combustion chamber 8, and is a part of a water supply pipe 10 that connects the heat exchange section 7 and the water supply port 3. is wrapped around the outside of the drum 9 to prevent the temperature of the drum 9 from rising.

A mixing tank 12 is provided between the hot water supply pipe 11 connecting the outlet of the heat exchanger 2 and the hot water supply port 4 to prevent after-boiling, and the hot water supply pipe 11 is connected to a hot water supply pipe 13 that enters the mixing tank. It consists of an exit pipe 14. The mixing tank 12 includes two mixing chambers 12a and 12b separated by an internal partition plate 15.

[0011] The hot water inlet pipe 13 protrudes to the vicinity of the center inside the mixing chamber 12a, and the hot water inlet pipe opening 13a at the tip is provided opposite to the wall surface of the mixing chamber 12a, changing the direction by 90 degrees from the flow direction of the hot water. . On the other hand, the tapping pipe 14 protrudes to the vicinity of the center inside the mixing chamber 12b, and the tap opening 14a at the tip is as follows.
It is provided facing the wall surface of the mixing chamber 12b with the direction changed by 90 degrees from the flow direction of the melt. The partition plate 15 has a convex shape on the side of the mixing chamber 12a, and a trumpet-like shape on the side of the mixing chamber 12b at the outlet, so that the liquid flows along the wall of the mixing chamber (arrow →) and has a stirring effect, making it faster and more uniform. The shape allows for mixing.

[0012] Immediately after tapping the hot water, burner 1 and heat exchanger 2 after combustion
The water in the heat exchanger 2 is heated to a high temperature (60℃) due to the amount of residual heat.
The boiling water (above) enters the mixing chamber 12a in the mixing tank 12 through the hot water inlet pipe 13 through the hot water inlet pipe opening 13a when it is reused immediately after hot water supply is stopped, but is discharged toward the wall of the mixing chamber 12a. The hot water diffuses all around the spherical wall surface of the mixing tank 12, mixes well with the suitable temperature water (around 40°C) inside the mixing chamber 12a, and then passes through the partition plate 15.
and enters the mixing chamber 12b. The outlet of the partition plate 15 is shaped like a trumpet, and the hot water flows (arrow →) along the wall surface of the mixing chamber 12b, resulting in faster and more uniform stirring.
By the time hot water is discharged from the hot water tap opening 14a that protrudes to the vicinity of the center of the interior of the hot water chamber 12b, the hot water is thoroughly mixed with the appropriate temperature hot water (about 40° C.) in the mixing chamber 12b.

Due to the stirring effect in the two mixing chambers, if the mixing tank capacity (approximately 0.3 to 0.4 liters) is approximately the same as the water capacity in the heat exchanger, the temperature of the hot water supplied from the hot water supply port 4 will increase. At best, the water does not rise more than 10 degrees Celsius higher than the appropriate temperature, ensuring stable hot water supply. In addition, since it can be done with a small-capacity mixing tank, water at an appropriate temperature can be used in a short time even when used from cold, and the amount of water that is wasted is small, making it possible to provide a compact and easy-to-use water heater.

FIG. 3 is a cross-sectional view of a mixing tank according to another embodiment, in which hot water that has passed through a heat exchanger (not shown) by post-boiling passes through a hot water inlet pipe 16 to the top of a mixing tank 17. The hot water is discharged toward the spherical wall surface of the mixing chamber 17a from the inlet pipe opening 16a that protrudes into the inside of the mixing chamber 17a from the side, diffuses around the entire circumference, and is well mixed with the appropriate temperature hot water inside, and flows into the mixing chamber 17b through the partition plate 18. enter. The outlet of the partition plate 18 is shaped like a trumpet, and the melt flows (arrow →) along the wall surface of the mixing chamber 17b, allowing faster and more uniform stirring. Then, the hot water tap 19 extends from the hot water tap opening 19a that protrudes to the vicinity of the interior center of the mixing chamber 17b.
By the time the hot water passes through the hot water and is discharged, it is configured to be well mixed again with the appropriate temperature hot water in the mixing chamber 17b.

FIGS. 4 and 5 are cross-sectional views of a plurality of independent mixing chambers or mixing tanks in another embodiment. Fig. 4 shows a gourd-shaped mixing tank 20 with a constricted center instead of a partition plate, and is composed of two mixing chambers 20a and 20b, with the hot water inlet pipe opening 21a of the hot water inlet pipe 21 protruding into the mixing chamber 20a, and facing the wall surface. The outlet pipe opening 22a of the outlet pipe 22 is configured to protrude into the mixing chamber 20b and to face the wall surface, and a stirring effect similar to that of the embodiment shown in FIG. 3 can be obtained. .

FIG. 5 shows that the mixing tank 23a and 23b are made up of two independent mixing tanks 23a and 23b, and the inlet pipe opening 25a of the inlet pipe 24a and the outlet pipe opening 27a of the outlet pipe 26a protrude into the interior of the mixing tank 23a and are attached to the wall surface. They are placed facing each other. With a similar configuration, the hot water inlet pipe opening 25b of the hot water inlet pipe 24b and the hot water outlet pipe 27b of the hot water outlet pipe 26b are provided to protrude into the inside of the mixing tank 23b and face the wall surface, and both openings are arranged substantially in the direction of the flow of hot water. The water heater is configured to change direction by 90 degrees or more, and a double stirring effect can be obtained in each of the mixing tanks 23a and 23b, making it possible to provide a water heater that is more compact and easy to use. In this case, one mixing tank can be made much smaller, and two
Since the two mixing tanks can be configured separately, installation can be made easily by utilizing the dead space of the equipment.

[0017]

[Effects of the Invention] As described above, according to the water heater of the present invention, the following effects can be obtained. (1) In each mixing chamber, the hot water is stirred along the wall surface and mixed well with the appropriate temperature water by turbulent flow from the surroundings to the inside, so the agitation between the hot water and the appropriate temperature water due to post-boiling is significantly improved. , it is possible to provide a small and inexpensive water heater that can ensure stable hot water supply at an appropriate temperature. (2) In each mixing chamber, the hot water diffuses along the wall surface and can be sufficiently mixed with the appropriate temperature water by the turbulent flow from the periphery toward the inside, so the capacity of the mixing tank can be configured to less than half of the conventional one. In addition, when using the mixing tank first thing in the morning, hot water can be supplied at the appropriate temperature in a short time, and the amount of water in the mixing tank can be reduced. (3) Due to the mixing tank configuration consisting of multiple mixing chambers, one mixing tank can be made much smaller and can be placed separately, so it can be placed using dead space within the equipment, making effective use of space. can.

[Brief explanation of the drawing]

[Fig. 1] A sectional view of essential parts of a water heater showing an embodiment of the present invention.

[
Figure 2: Cross-sectional view of the mixing tank in Figure 1

[Fig. 3] Cross-sectional view of a mixing tank of another embodiment

[Fig. 4] Cross-sectional view of a gourd-shaped mixing tank of another embodiment

[Figure 5] Cross-sectional view of multiple mixing tanks in another embodiment

[Figure 6] Cross-sectional view of main parts of a conventional water heater

[Explanation of symbols]

1 Burner 2 Heat exchanger 10 Water supply pipe 11 Hot water pipe 12 Mixing tank 12a, 12b Mixing chamber 13　Hot water intake pipe 13a　Hot water intake pipe opening 14 Hot water outlet pipe 14a Hot water outlet pipe opening 15 Partition plate

Claims (1)

[Claims] Claim 1: A burner, a combustion chamber, a heat exchanger provided above the combustion chamber, a water supply pipe connecting the heat exchanger from a water supply port, and a connection between the heat exchanger and the hot water supply port. comprising a hot water supply pipe and a mixing tank at the outlet of the heat exchanger,
The mixing tank is composed of a plurality of mixing chambers communicating with each other, and the tips of the hot water inlet pipe on the inlet side and the hot water outlet pipe on the outlet side of the mixing tank respectively protrude into the mixing tank, and the tips of the hot water inlet pipe and the hot water outlet pipe The opening direction of the molten metal is changed from the flow direction by approximately 90 degrees, and is oriented in opposite directions.
A water heater installed opposite the wall of the mixing tank.