JPS623644Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to the improvement of hot water storage type water heaters, and uses the fact that cold water with a heavy specific gravity falls downward to preferentially discharge hot water from the upper part of the water storage tank. This is convenient in use by preventing the low-temperature hot water generated during combustion cessation from being discharged, thereby always keeping the temperature range of the discharged water small.

In conventional hot water storage type water heaters, a method has been proposed in which a hot water tap is connected to the top of the hot water storage tank by making it slightly protrude, and hot water is discharged from the top. The heat absorption pipe is connected to face the hot water outlet pipe at the bottom of the hot water storage tank, so that a smooth water flow is created between the two. There was a drawback that the low-temperature hot water that was radiated by the hot water was discharged, resulting in large differences in the temperature range of the discharged water.

This invention corrects these conventional drawbacks, and the gist of its configuration is that a water chamber 3 is installed in the lower part of the hot water storage tank 1 surrounding the outlet 2a of the heat absorption pipe 2.
In a hot water storage tank, a hot water outflow opening 5 is bored in the upper plate 4 of the water chamber 3, and the hot water flows out from the opening to the hot water outlet pipe 7 above the hot water outflow opening 5. The plate 6 is extended to the upper part and covers the opening of the hot water tap 7 which is inserted into the upper part of the hot water storage tank 1 at a position spaced apart from the guide plate 6 in the axial direction.
3, the hot water rising from the opening 5 of the water chamber 3 is guided upward by the guide plate 6 and flows into the outlet pipe 7, while the cold water is allowed to fall from the side opening of the guide plate. Preventing hot water from flowing into the hot water outlet pipe 7
The hot water tank is spaced apart from the guide plate 6, and the opening of the hot water outlet pipe is covered and surrounded by a cylinder so that hot water from the upper part of the hot water storage tank flows into the hot water outlet pipe.

An embodiment of this invention will be described below based on the drawings.

In the drawing, 1 is a hot water storage tank, and 2 is a heat absorption pipe, which is used to connect and communicate the hot water storage tank 1 and water storage tank 8, and to heat and raise the temperature of the water flowing through the water. The hot water storage tank 1 is installed at a slightly different position above the water storage tank 8, and the heat absorption pipe 2 is installed on the combustion tube 11 at a slight inclination. . 3 is provided at the lower part of the hot water storage tank 1 and has a substantially fan-shaped cross section;
In the axial direction, it is a water chamber that is a little shorter than the total length and is divided into a hermetically sealed water chamber.
is open and surrounded by a water chamber 3. A hot water outflow opening 5 is bored in the back of the upper plate 4 of the water chamber 3 at a position approximately in the axial direction of the hot water storage tank 1, and a narrow guide plate 6 is provided at the back of the opening 5 so as to extend upwardly. Set up In the embodiment, the guide plate 6 is provided to extend the width of the opening 5. A temperature measuring element 10 is inserted and installed on the circumferential surface of the hot water storage tank 1 above the hot water outflow opening 5 of the water chamber 3.
Front and rear, left and right dimensions of hot water outflow opening 5 and guide plate 6
The width, inclination angle, and their mounting position relationship are determined so that the water flow sufficiently surrounds the temperature sensing element 10 and passes through it. Reference numeral 7 denotes a hot water outlet pipe, which is connected to the top of the hot water storage tank 1 by being slightly inserted thereinto, and is spaced apart from the guide plate 6 in the axial direction. Reference numeral 12 denotes a circulating water pipe that connects and communicates with the lower portions of the hot water tank 1 and the water storage tank 8, respectively, and opens to the outside of the water chamber 3 of the hot water storage tank 1.
Reference numeral 13 denotes a cover cylinder fixed to the upper part of the hot water storage tank 1 to surround the opening of the hot water tapping pipe 7, and 14 is an opening formed in the upper circumferential surface of the cover cylinder 13.

In the above configuration, the hot water flowing out from the heat absorption pipe 2 through the hot water outflow opening 5 is guided to the upper part of the hot water storage tank 1 along the inclined guide plate 6, and is guided to the upper part of the hot water storage tank 1 along the upper part of the hot water storage tank 1. A temperature measuring element 10 installed on the upper part of the guide plate 6 (indicated by the arrow b)
Since the hot water flows reliably around the surrounding area, the temperature of the outlet water is sensitively sensed and accurate temperature control is performed. Here, since the low-temperature hot water has a high specific gravity, it does not reach the upper part of the guide plate 6 and flows through the side opening of the guide plate 6 into the hot water tank 1.
(indicated by arrow a), and the outlet pipe 7
There will be no inflow into. Therefore, only high-temperature hot water is discharged from the upper part of the hot water storage tank 1, and low-temperature hot water does not flow in. In particular, it is possible to prevent the low-temperature hot water that has been dissipated from the heat absorption pipe section during combustion suspension from being discharged, and also to prevent high-temperature hot water from flowing out. The boiling water is buffered by the hot water in the hot water storage tank and cools down, and when passing just before the entrance of the hot water tap 7, high temperature hot water is sucked in by the cover tube 13 and their temperatures are averaged, so the hot water temperature range is reduced. This narrows the In addition, if the upper plate 4 of the water chamber 3 is tilted backward with respect to the horizontal plane as shown in Figs. To eliminate the danger of being sucked into the hot water outlet pipe 7. Furthermore, in this example,
Since only the highest temperature hot water at the top of the hot water storage tank 1 is allowed to flow in and out from the opening 14 through the cover tube 13, the effect of narrowing the difference in hot water temperature is doubled.

As explained above, this idea consists of extending the guide plate upward from the back of the opening made in the upper plate of the water chamber that hermetically surrounds the outlet of the heat absorption pipe, and making the opening of the hot water outlet pipe more axially than the guide plate. It has a simple structure in which the opening of the water chamber is covered and surrounded by a tube, and the high-temperature hot water from the opening of the water chamber rises along the guide plate and is reliably introduced into the tap pipe, and at that time, the low-temperature hot water is Since the water does not descend through the wide opening on the side of the guide plate and is introduced into the hot water tap, the disadvantage of cold water coming out especially when starting reuse is eliminated, and the temperature of boiling water is lowered, and the presence of the cover tube makes it easier to mix with the surrounding hot water. Since the mixing is made uniform and the temperature range of the tapped water is significantly narrowed, the tapped hot water temperature is always stable, which is convenient in practical use.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view showing an embodiment of this invention, and FIG. 2 is a longitudinal sectional view of the main parts. 1... hot water storage tank, 2... heat absorption pipe, 2a... its outlet, 3... water chamber, 4... upper plate, 5... hot water outflow opening, 6... guide plate, 7... hot water outlet pipe , 8... Water tank, 13... Cover tube.

Claims (1)

[Scope of utility model registration request] A water chamber 3 surrounding the outlet 2a of the heat absorption pipe 2 is provided in the lower part of the hot water storage tank 1, an opening 5 for hot water outflow is bored in the upper plate 4 of the water chamber 3, and hot water flows out from the opening to the outlet pipe 7 at the upper part. In the hot water storage tank, a narrow guide plate 6 is installed at the back of the hot water outflow opening 5 to the upper part, and a hot water tap is installed at a position spaced apart from the guide plate 6 in the upper part of the hot water tank 1. A hot water storage type water heater comprising a pipe 7 whose opening is covered and surrounded by a cylinder 13.