JPS601541B2 - hot water boiler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the water supply structure of a hot water boiler, and more specifically, by inserting a turning member, such as a twisted plate, in a water supply pipe to turn the east water flow, the present invention relates to an improvement in the water supply structure of a hot water boiler. In addition to activating water diffusion and improving heat conversion efficiency,
This provides an advantageous structure for obtaining high temperature water.

As a result, attempts have been made to increase the temperature of hot water supplied from the water supply pipe as high as possible, and in particular, consideration has been given to the positional relationship between the water supply pipe and the thermistor for temperature control.

Here, the temperature of the hot water is controlled by temperature sensing by the thermistor, but the temperature of the hot water before the thermistor operates to stop combustion, that is, the critical temperature, depends on the positional relationship between the water supply pipe and the thermistor. It is difficult to comply with the provisions of JIS (Japanese Industrial Standards).

The fact that the critical temperature can be set high means that the combustion device can continue to burn, which means that high-temperature water can be heated. Conventionally, a structure was considered in which the operating temperature of the thermistor was set high and combustion would not stop unless the hot water temperature rose, but simply increasing the set temperature of the thermistor would not cause the temperature of the can itself to rise. This is undesirable because the overheating prevention device, which operates by sensing the abnormal temperature of the can body, will not work properly.

In addition, after combustion has stopped, the temperature rises due to residual heat in the can body (
There was a noticeable overshoot (called overshoot), which also prompted the operation of the overheating prevention device, causing the problem that combustion operation did not occur even though the hot water temperature had fallen below the critical temperature. The present invention eliminates the above-mentioned conventional drawbacks, and embodiments thereof will be described below. In the figure, 1 is the outer shell and 2 is the inner shell.
The hot water storage tank 3 is configured by the above. And Naigai Tsukioka 2,1
constitutes the can body. The upper part of the inner body 2 is expanded in the direction of the fold to form a tapered expansion part 4,
Further, one ends of a water supply pipe 5 and a wound supply pipe 6 are respectively connected to the expanded tube part 4 of the inner 8 and 2 so as to pass through the wound storage tank 3. An overheat prevention device 7 is provided in the outer ear 1 portion corresponding to the combustion chamber in the inner ear 2, and an overheat prevention device 7 is provided in the outer shell 1 portion above the device 7 for controlling the temperature of water in the hot water storage tank 3. a thermistor 8 as a hot water temperature detection element; and an electrostatic corrosion protection electrode (not shown) for protecting the can body when the inside surface is treated with glass lining, for example.
is installed.

A combustion device such as a gun-type burner 9 is installed in the combustion chamber, and the start and stop of combustion of the burner 9 is controlled by a thermistor 8, and combustion is stopped by the operation of the overheat prevention device 7. The above-mentioned water supply pipe 5 is stepped at its connecting portion with the can body to form a closed cross-sectional shape that extends in all directions around the can body, and includes a rotating member 10 as shown in FIG. A plate is arranged as shown in FIG. 4, and the water flow east from the water supply pipe 5 is spread in all directions around the hot water storage tank 3 by centrifugal force within the storage tank 3.

In the above configuration, the structure of the water supply pipe 5 is as shown in FIG. 5, and the water supply flow east has a considerably large spread as shown in FIG. In a cylindrical water supply pipe 5' without a village, a narrow water supply flow east is formed as shown in Fig. 8B, and in a water supply pipe 5'' with only a step in Fig. It forms a stream east as shown in Figure 8C, and is narrower than A.

In this way, if the water supply pipe 5 having the above-mentioned rotating member 10 is used, the water supply into the wound storage tank 3 will spread widely, and the water supply will actively come into contact with the heat exchange surface of the inner tube 2, resulting in good heat exchange. Exchange is obtained.

In addition, since the supply water spreads well, the thermistor 8 detects cold water quickly, prompts the operation of the combustion device, increases the rate at which the thermistor 8 is cooled, and makes it difficult for the operation of the combustion device to stop. Critical temperature increases.

This increase was around 5°C. FIG. 9 shows the change in critical temperature over time. In the case of using the water supply pipe 5 of this embodiment, the critical temperature is set high as shown in a, that is, the thermistor operates. The temperature can be set high, which allows hot water to be dispensed. In the figure, b is the water supply pipe 5 in Figure 7.
In addition, according to this embodiment, the can body itself can be actively cooled, and the temperature rise in the can body can be suppressed to a low level as shown in FIG. 10a.

Further, overshoe after combustion stops can also be suppressed to a low level after time T. In the same figure, b shows the case where the water supply pipe 5'' of Fig. 7 is used.Furthermore, since the detection of the thermistor temperature becomes faster, the hot water supply drop becomes high as shown in Fig. 9a, showing favorable characteristics.

Also, the time it takes for the temperature to recover to a certain level after dropping is short because water is supplied through diffusion. That is, since the heating rate is fast, hot water can be supplied in a manner suitable for actual use. As described above, according to the hot water boiler of the present invention, it is possible to improve the heat exchange efficiency and it is also effective in improving the hot water supply temperature.

In addition, since the rotating member installed inside the water supply pipe is placed near the connection part of the water supply pipe with the can body and on the upper side, even if the resistance to flowing water changes due to the uneven completion of the connection part, even if the resistance to flowing water changes, the flow of water will be larger. This makes it possible to keep the swirling flow inside the vessel stable without any change.

Furthermore, since the thermistor is located in the diffusion castle of the water supply,
When water is supplied, the temperature of the hot water can be increased by the uniform cooling of the thermistor, while the temperature distribution inside the can is prevented from localized heating due to the fact that the water is spread inside the can, allowing the temperature of the can to be lower than the hot water temperature. .

[Brief explanation of the drawing]

Fig. 1 is a side view of a hot water boiler according to an embodiment of the present invention, Fig. 2 is a top view thereof, Fig. 3 is a side view of a rotating part inserted into the water supply pipe, and Fig. 4 is a top view showing the assembled state of the same member, FIGS. 5 to 7 are schematic sectional views showing comparative examples of the water supply flow rate, and FIG. 8 is an explanatory diagram of the water supply flux,
FIG. 9 is a diagram showing the relationship between critical temperature and time, and FIG. 10 is a diagram showing the relationship between the temperature of the can body itself and time. 1... External 8 same, 2... Inner ear same, 3... Wound storage tank, 5... Water supply pipe, 1
0...Swivel member. Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] 1. A turning member for rotating the water supply flux is installed in the water supply pipe connected to the can body near and on the upper side of the connection part of the water supply pipe with the can body, and a thermistor is disposed in the diffusion area of the supply water. A hot water boiler.