JPS5839326Y2 - hot water storage water heater - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot water storage water heater using a gas burner.

Generally, many of this type of hot water storage water heaters have a cylindrical hot water storage tank arranged vertically in the axial direction.

For example, as the above-mentioned conventional example, Utility Application No. 49-94437
There is a number.

However, if the installation space for the hot water storage water heater is horizontally long, it is impossible to use the above-mentioned conventional example by laying it down on its side.

In other words, if it is laid down on its side, the gas burner will be located at one end in the left and right direction of the hot water storage tank, making it impossible to effectively heat the water in the hot water storage tank, resulting in poor thermal efficiency and overheating the outer wall of the gas burner, which could lead to a fire. This is because there is a danger of

The present invention was developed in view of the above points, and its purpose is to provide a water heater with a cylindrical hot water tank installed with the axial direction substantially horizontal. The purpose is to enable efficient heating by appropriately setting the position of the gas burner.

Examples will be described below using figures.

Figure 5 shows a basic example of the present invention, in which a cylindrical combustion chamber 2 and a cylindrical gas burner 3 are arranged concentrically (so that their axes coincide) in a cylindrical hot water storage tank 1. It is something.

However, it has been found that this basic example configuration has a problem in that the water in the upper half of the hot water storage tank becomes particularly high in temperature, and the temperature difference between the upper and lower halves becomes too large.

In other words, according to the inventors' experiments, the hot water tank 1
If the gas burner 3 and the combustion chamber 2 are arranged concentrically, the water in the hot water tank 1 will be heated uniformly from the center, and the convection in the hot water tank 1 will be as shown by the solid line arrow and the dotted line arrow in Figure 5. It will be shown as follows.

That is, on the left and right sides of the combustion chamber 2, since the temperature difference between the upper and lower portions is approximately equal, an upward flow (solid line arrow) is generated symmetrically.

In this case, the downward flow (dotted line arrow) also occurs symmetrically, but the almost equal upward flow and downward flow are mixed on both sides, creating a tongue Ut, and smooth convection is not carried out, and the hot water storage tank 1 There is a problem in that the temperature difference between the top and bottom becomes large, making it impossible to heat water efficiently.

The embodiments of the present invention shown below were made taking the above points into consideration.

FIGS. 1 and 2 show an embodiment of the present invention, in which a hot water storage tank 1 is formed in a cylindrical shape, and the hot water storage tank 1 is arranged so that its axial direction is substantially horizontal.

A cylindrical combustion chamber 2 that opens at the center of the side of the hot water tank 1 is provided in the hot water storage tank 1, and the axial direction of the combustion chamber 2 is parallel to the axial direction of the hot water storage tank 1.

However, in the embodiment shown in FIG. 2, the axes of the combustion chamber 2 and the hot water storage tank 1 are substantially aligned, but they do not necessarily have to be formed coaxially.

The opening of this combustion chamber 2 includes the entire outer circumference of the hot water tank 1 and the main body frame 11.
An exhaust passage 7 formed between the main body frame 11 and the inner peripheral surface is communicated with each other, and the entire outer circumference of the main body frame 11 is covered with a heat insulating material 4.

In addition, a cylindrical infrared type gas burner 3 that burns with all primary air is hermetically arranged at a position eccentrically downward from the center of the combustion chamber 2, and the axis of the gas burner 3 whose peripheral surface is the combustion surface. The direction is parallel to the axial direction of the hot water storage tank 1.

That is, the gas burner 3 is eccentrically arranged with respect to the axis of the hot water storage tank 1 so that the water diagonally downward on one side is strongly heated.
The open end of the mixing pipe 5 communicating with the gas burner 3 is led out of the hot water storage tank 1, and the end of the gas pipe 6 is inserted into the mixing pipe 5 from this open end.

When water is supplied into the hot water tank 1 from the water supply pipe 8 and the gas burner 3 is ignited by the pilot burner 9, the combustion chamber 2 is heated by the gas burner 3, and the water in the hot water tank 1 and the combustion chamber 2 are heated. Heat is exchanged through the combustion chamber 2 wall and the hot water storage tank 1
The water inside is heated.

In addition, a thermostat is provided in the hot water storage tank 1, which turns on and off the gas burner 3 according to the water temperature, and controls the temperature of the hot water storage tank 1.
This is to keep the water temperature inside at a constant temperature.

Here, the water diagonally below the combustion chamber 2 near the gas burner 3, that is, diagonally below the axis of the hot water storage tank 1, is heated more strongly than the water in other parts. The temperature difference between the upper and lower parts of the water on the right side is much larger than the temperature difference between the upper and lower parts of the water on the left side.

Therefore, the upward flow that occurs on the right side is much larger than the upward flow that occurs on the left side.

On the other hand, at this time, the downward flow that occurs on both sides is more likely to occur on the left side, so there is a counterclockwise rotation along the inner peripheral surface of the hot water tank 1 as shown by the arrow in the figure. Convection occurs, and the water in the hot water tank 1 is heated uniformly and efficiently.

Note that an upward flow also occurs on the left side of the combustion chamber 2, and a downward flow occurs on the right side, so some turbulence will occur, but the relationship between the upward flow and the downward flow on each side Since the difference is large, rotational convection that rotates in the circumferential direction occurs as a whole.

FIG. 3 shows another embodiment, in which the combustion chamber 2 containing the gas burner 3 in the center is eccentrically provided diagonally below the hot water storage tank 1; The capacity between the lower parts of the hot water storage tank 1 is formed to be significantly smaller at the lower left side of the combustion chamber 2, and the water diagonally below the axis of the hot water storage tank 1 is strongly heated.

As a result, this water temperature difference causes strong convection similar to the above-described embodiment.

Further, in the embodiment shown in FIG. 4, the gas burner 3 for the combustion chamber 2 is
and the position of the combustion chamber 2 with respect to the hot water storage tank 1 are both eccentric downwardly with respect to the axis of the hot water storage tank 1, and in this case, the effects of the two embodiments described above are combined to produce a particularly strong convection. It is something.

In the figure, 10 is a hot water supply pipe that supplies hot water.

The present invention is constructed as described above, in which a cylindrical combustion chamber is placed inside a cylindrical hot water storage tank with its axial direction substantially horizontal, and its axial direction is parallel to the axial direction of the hot water storage tank. At the same time, a cylindrical gas burner whose peripheral surface is a combustion surface is arranged in the combustion chamber so that its axial direction is parallel to the axial direction of the hot water tank, and the gas burner is aligned with the axis of the hot water storage tank. For example, if a gas burner is placed eccentrically with respect to the axis of the hot water tank so that the water on the lower right side is heated strongly, the water on the right side of the combustion chamber will rise. A downward flow occurs on the left side of the combustion chamber, creating a strong rotating convection around the combustion chamber, which has the advantage of efficiently heating the water in the hot water tank.

In other words, a cylindrical gas burner whose peripheral surface is the combustion surface is arranged in the combustion chamber so that its axial direction is parallel to the axial direction of the hot water storage tank, and the gas burner is placed diagonally downward on one side with respect to the axis of the hot water storage tank. Because the water is eccentrically arranged so that it is strongly heated, strong rotating convection can be easily generated around the combustion chamber by natural convection due to the water temperature difference, and smooth convection can be formed without using forced convection means. It has the advantage of improving thermal efficiency.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view of an embodiment of the present invention, Fig. 2 is a schematic side sectional view of the same as above, Figs. 3 and 4 are schematic side sectional views of other embodiments, and Fig. 5 is a schematic side sectional view of the invention. 1 is a schematic side sectional view of a basic example, in which 1 is a hot water storage tank, 2 is a combustion chamber, and 3 is a gas burner.

Claims (3)

[Scope of utility model registration request] (1) A cylindrical combustion chamber is formed inside a cylindrical hot water storage tank that is arranged with its axial direction substantially horizontal, and the cylindrical combustion chamber is formed so that its axial direction is parallel to the axial direction of the hot water storage tank. A cylindrical gas burner with a combustion surface on its periphery is arranged so that its axial direction is parallel to the axial direction of the hot water storage tank, and the gas burner is placed so that the water on one side diagonally below the axis of the hot water storage tank is strongly heated. A hot water storage water heater that is eccentrically placed so that it can be used. (2) Scope of Utility Model Registration Claim 1: The combustion chamber is shaped so that the axis of the combustion chamber is diagonally downward with respect to the axis of the hot water storage tank, and the gas burner is disposed coaxially with the combustion chamber. Water storage water heater as described in section. (3) The combustion chamber is formed so that the axis of the combustion chamber is diagonally downward with respect to the axis of the hot water storage tank, and the gas burner is arranged so that the axis of the gas burner is further diagonally downward with respect to the axis of the hot water storage tank. A hot water storage water heater according to claim 1 of the utility model registration claim.