JPS6144112Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot water storage type boiler, and its gist is that a heating device 2 is installed in the lower part of the hot water storage tank 1, and the heating device is 2 with a gap 5 in between, and the upper opening 7 of the vertical guide pipe 6 on the upper part of the hot water induction device 3 is opened at the upper part of the hot water storage tank 1, and the lower part is placed on the upper surface of the outer shell part 4 at the lower part of the hot water induction device This relates to a hot water storage type boiler in which an opening 8 is bored and the lower opening 8 is closed by an opening/closing lid 9 which opens when an appropriate amount of high temperature hot water is stored in the upper part of the hot water storage tank 1.

In conventional hot water storage type boilers, the water in the lower part of the hot water storage tank was heated to a high temperature by a heating device, and this high temperature hot water was sent to the upper part of the hot water storage tank.
As shown by the curve A in the graph in the figure, the temperature rises rapidly after ignition, whereas the temperature in the lower part of the hot water storage tank rises only gradually, as shown in the curve C in the graph in Figure 3. Even if high-temperature hot water was stored in the upper part of the tank, the temperature in the lower part of the tank did not rise easily, and it took time for the entire tank to reach a high temperature, and it was difficult to achieve a uniform temperature inside the tank. .

The present invention was developed in view of the drawbacks of the conventional examples mentioned above, and its purpose is that when a suitable amount of high-temperature hot water is stored in the upper part of the hot water tank, the lower opening opens and the high-temperature water flows into the hot water tank. To provide a hot water storage type boiler capable of rapidly raising the temperature of hot water supplied to the lower part of the hot water storage tank and storing hot hot water of uniform temperature in the hot water storage tank.

The present invention will be explained in detail below with reference to Examples. Reference numeral 1 denotes a hot water storage tank, which has a water injection hole 10 at its lower end and a hot water supply hole 11 at its upper end. Reference numeral 2 denotes a heating device installed in the lower part of the hot water storage tank 1. The one shown is a heat exchanger 2a which is an example of the heating device 2, and a heat exchange pipe 12 is installed from the side wall of the lower part of the hot water storage tank 1 to the opposite side wall. A heat exchange plate 13 is built into the heat exchange pipe 12 by passing through the heat exchange pipe 12. A burner part 15 for burning gas is installed in the opening 14 at one end of the heat exchange pipe 12, and the other end of the heat exchange pipe 12 is provided with a burner part 15 for burning gas. An exhaust pipe 16 is connected upwardly outside the hot water storage tank 1. 3 is a high temperature hot water induction device;
A substantially semi-cylindrical outer shell part 4 is integrally formed at the lower end of the cylindrical vertical guide pipe 6 which is open upwardly and downwardly, so that the lower opening of the guide vertical pipe 6 and the inner peripheral surface of the outer shell part 4 are communicated with each other. It is something. In addition, a plurality of through holes 17 are bored in the guiding vertical tube 6, a lower opening 8 is opened on the upper surface of the outer shell 4, and a bimetal type opening/closing lid 9 is provided in the lower opening 8 as shown in FIG. is installed. The bimetallic opening/closing lid 9 is one that closes the lower opening 8 when the temperature is below a certain temperature Ta, but opens the lower opening 8 when the temperature exceeds Ta. For example, the opening/closing lid 9 itself has two types with different expansion coefficients. It is made of bimetal bonded with metal and when the temperature exceeds Ta, the opening/closing lid 9 itself warps and opens the lower opening 8. Alternatively, one end of the bimetal is fixed to the opening/closing lid 9 and the other end is removed. A conceivable example is one in which the opening/closing lid 9 is fixed to the shell part 4 or the like so that the opening/closing lid 9 is opened by a bimetal at a temperature of Ta or higher. The hot water induction device 3 is disposed in the hot water storage tank 1, and as shown in FIG. A gap 5 is formed in between, and the upper surface opening 7 of the vertical guide pipe 6 is opened at the upper end inside the hot water tank 1 . When the water stored in the hot water tank 1 is boiled, the process is as follows. When the burner section 15 is ignited, the high-temperature gas passes through the heat exchange pipe 12 and is exhausted from the exhaust pipe 16, heating the heat exchange pipe 12 and the heat exchange plate 13 to a high temperature along the way. On the other hand, water in the lower part of the hot water storage tank 1 flows into the gap 5 from the lower end of the outer shell 4, exchanges heat with the heat exchanger 2a in the gap 5, and becomes high-temperature hot water. Since it is closed, this high-temperature hot water rises in the vertical guide pipe 6, comes out from the upper opening 7 of the vertical guide pipe 6, and is stored in the upper part of the hot water storage tank 1. When high-temperature hot water accumulates in the upper part of the hot water storage tank 1, the high-temperature hot water that rises inside the vertical guide pipe 6 is transferred from each through hole 17 to hot water with a similar specific gravity outside the vertical pipe 6 due to its specific gravity. It goes out of the guiding vertical tube 6. In this way, high-temperature hot water is stored from above through the vertical guide pipe 6, and enough high-temperature hot water is secured in the upper part of the hot water storage tank 1 for small use (for example, for washing dishes in the kitchen). A certain amount of high-temperature hot water is stored in the hot water storage tank 1, and when the temperature of the water in the lower part of the hot water storage tank 1 rises and reaches a certain temperature Ta, the bimetallic opening/closing lid 9 opens and the high-temperature hot water heated by the heat exchanger 2a is released. flows out from the lower opening 8 to the lower part of the hot water tank 1, and the temperature of the lower part of the hot water tank 1 rises rapidly, as shown by the curve B in the graph of FIG. 3b.
As shown by the curves A and B, the temperature of the entire interior of the hot water tank 1 rises rapidly, and the interior of the hot water reservoir 1 reaches a substantially uniform temperature distribution in a short period of time. t ₀ in FIG. 3 is the time when the opening/closing lid 9 is opened. Also, as can be seen from Fig. 3, the set temperature Ta for opening the opening/closing lid 9 is as follows:
The temperature around the boundary where the temperature at the top of hot water storage tank 1 almost rapidly rises to a high temperature and begins to enter a gradual rising range.
The temperature in the lower part of the hot water storage tank 1 when Tb is reached (of course, it is higher than the initial water temperature) is preferable.

2a and 2b are other examples of the present invention, in which a hot water temperature detector 18 is installed in the upper part of the hot water storage tank 1, and a hot water temperature sensor 18 is provided in the lower opening 8 of the high temperature hot water induction device 3. The lid 9 opens and closes as the water temperature changes.
Control unit 19 and hot water temperature detector 18 for opening and closing
The water temperature sensor 1 is electrically connected to the water temperature sensor 1.
The temperature of the hot water detected by 8 is a constant temperature Tb
When the temperature Tb is reached, the opening/closing lid 9 that closes the lower opening 8 is electrically opened by the control unit 19, and the temperature is maintained at a constant temperature Tb.
The opening/closing lid 9 can be closed when the opening/closing lid 9 is lowered. As described above, the constant temperature Tb is preferably set to a temperature around the boundary where the temperature at the top of the hot water storage tank 1 rapidly rises to a high temperature and then enters a gradual rising range. The installation height of the hot water temperature detector 18 may be selected so that the volume of the hot water above the hot water tank 1 is approximately equal to the amount of high temperature hot water that is initially desired to be stored in the upper part of the hot water tank 1.

As described above, the present invention incorporates a heating device in the lower part of the hot water storage tank, covers the heating device with a gap between the outer shell of the lower part of the hot water induction device, and opens the top opening of the vertical guide pipe in the upper part of the hot water induction device. An opening is made at the upper part of the hot water storage tank, and a lower opening is bored at the lower part of the hot water induction device, and the lower opening is closed by opening and closing when an appropriate amount of hot water is stored in the upper part of the hot water storage tank. Therefore, the water in the gap is heated to a high temperature by the heating device, and the high-temperature hot water is sent to the upper part of the hot water tank through the induction vertical pipe, and an appropriate amount of high-temperature hot water can be stored in the upper part of the hot water tank. After storing an appropriate amount of hot water, you can open the lid and send the hot water to the bottom of the tank to rapidly raise the temperature at the bottom of the tank.
There is an advantage that the temperature of the entire water in the hot water storage tank can be rapidly raised to high temperature hot water, and the inside of the hot water storage tank can be quickly brought to a uniform temperature.

[Brief explanation of the drawing]

Figures 1 a and b are a front view and a side sectional view showing one embodiment of the invention, Figures 2 a and b are a front sectional view and a side sectional view showing another example of the invention, and Figure 3 is a hot water storage tank. A graph showing changes in the water temperature or hot water temperature in which the horizontal axis is the elapsed time t and the vertical axis is the temperature T.
1 is a hot water storage tank, 2 is a heating device, 3 is a high temperature hot water induction device, 4 is an outer shell, 5 is a gap, 6 is a vertical guide pipe, 7 is an upper surface opening, 8 is a lower opening, and 9 is an opening/closing lid.

Claims (1)

[Scope of utility model registration request] A heating device is installed in the lower part of the hot water storage tank, and the outer shell of the lower part of the high temperature hot water induction device covers the above heating device with a gap, and the upper opening of the vertical guide pipe in the upper part of the high temperature hot water induction device is connected to the upper part of the hot water storage tank. At the same time, a lower opening is bored in the upper surface of the outer shell at the lower part of the hot water induction device, and the lower opening is closed by an opening/closing lid that opens when an appropriate amount of hot water is stored in the upper part of the hot water storage tank. Hot water storage boiler.