JPS5920567Y2 - Hot water boiler expansion tank - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an expansion tank used in a hot water boiler.

Expansion tanks commonly used in hot water boilers, which are mainly used for heating, have the expansion tank body directly connected to the hot water pipe, so the replenishment water and hot water inside the expansion tank body are The hot water in the pipes mixes directly with the hot water, and the heat of the hot water is transferred to the replenishment water through convection, conduction, etc., and the hot water boiler essentially warms the replenishment water, which hinders efficiency.

Furthermore, the replenishment water is in direct contact with the outside air, and considering the heat that escapes from its surface to the outside air, the heat of vaporization of the replenishment water, and the heat that escapes due to the gas suddenly generated from the hot water boiler being released directly to the outside air, etc. The heating efficiency becomes even worse.

Furthermore, due to abnormal expansion due to overheating of the hot water boiler, hot water would flow back into the expansion tank and overflow, so water had to be replenished from time to time.

The present invention was developed in view of these points, and aims to improve thermal efficiency by connecting the expansion tank body and the hot water pipe with a trap. A trap consisting of a curved pipe section and an inverted U-shaped sealing section, one end of which communicates with one end of the curved pipe section, and the other end of which has connection means to a hot water pipe. , an expansion tank body that stores replenishment water and has an opening at the top and the other end of the curved pipe part of the wrap is connected to the bottom part, and the trap and the outer wall of the expansion tank body are connected to each other. The invention resides in an expansion tank for a hot water boiler, characterized in that a space is provided between the tanks.

A detailed explanation will be given below based on examples.

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a sectional view thereof.

In both figures, 1 is the expansion tank main body in which replenishment water is stored, 2 is the opening provided on the top surface, 3 is the I-wrap connected to the bottom of the expansion tank main body 1, and 4 is the A hot water pipe 5 is a connecting pipe as a connection means to the hot water pipe 4.

Further, the trap 3 has one end connected to the expansion tank body 1.
a substantially U-shaped bent pipe section 31 connected to;
It is connected to the other end of this bent pipe part 31 and is separated from an air sealing part 32 which has a substantially inverted U shape, and there is a space between the outer wall of this trap 3 and the outer wall of the expansion tank main body 1. Separated by 6.

The connecting pipe 5 is attached to the end of this sealing section 32.

Fig. 3 is a schematic system diagram showing an example of a heating system in which an expansion tank configured as described above is actually used, in which 7 is a hot water boiler, 8 is a heating device, and 9 is a circulation pipe. It is.

The expansion tank is connected to the circulation pipe 9 by a hot water pipe 4, and the connection position is either on the return path of the circulation pipe 9 as shown by the solid line in the figure, or on the return path of the circulation pipe 9 as shown by the chain line. It may be the outbound route of 9.

The expansion tank 7 connected to the circulation pipe 9 in this way has
Gases such as bubbles and steam separated from the hot water are guided to the hot water pipe 4 and rise.

This gas gathers at the upper end of the sealing part 32 of the trap 3 to form a gas layer a.

This gas layer a causes the hot water in the hot water pipe 4 to reach the bent pipe part 31.
It is separated from the replenishment water C inside, and the heat of the hot water tank is no longer directly transferred to the replenishment water C through convection, conduction, etc.

The gas layer a formed in this way overflows from the lower end of the bent pipe section 31 depending on the amount of gas collected, and the expansion tank body 1
The air rises inside and is exhausted to the outside through the opening 2.

This gas layer a also has the effect of mitigating abnormal expansion of hot water due to overheating of the hot water boiler 7 or the like.

Here, as mentioned above, since the outer wall of the expansion tank body 1 is separated from the outer wall of the I-wrap 3 by the space 6,
No heat from the hot water tank is dissipated through this outer wall.

As explained in detail above, according to the expansion tank for a hot water boiler of the present invention, the connection between the expansion tank body and the hot water pipe is via the I-wrap formed by the bent pipe part and the air sealing part. Because of this, the hot water and replenishment water are completely separated by the gas layer collected at the upper end of the sealing part, preventing heat transfer through convection, conduction, etc., and allowing the heat of the hot water to be directly transferred to the replenishment water. Furthermore, the I-wrap has its outer wall separated from the expansion tank by a space, so that heat dissipation from the I-wrap is kept to a minimum, so that heat from the hot water boiler is transferred to the make-up water. In addition, abnormal expansion of hot water due to overheating of the hot water boiler can be alleviated by the action of the air layer inside the I-wrap, so replenishment water from the expansion tank is not dissipated wastefully. It is also possible to prevent the overflow of water, and therefore, it is possible to perform highly efficient, economical, and stable heating.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a schematic system diagram showing an example of its use. 1... Expansion tank, 2... Open part, 3... 1~
Wrap, 31... Bent tube part, 32... Air sealing part, 4...
・Hot water pipe, 5... Connection pipe, 6... Space, a...
Gas layer, b...hot water, C...replenishment water.

Claims (1)

[Scope of utility model registration request] an inverted U-shaped seal having a substantially U-shaped bent pipe section and one end communicating with the one end of the bent pipe section and the other end having connection means to a hot water pipe; and an expansion tank body which stores replenishment water and has an opening at the top and to which the other end of the curved pipe part of the trap is connected at the bottom. An expansion tank for a hot water boiler characterized by providing a space between outer walls.