JPH0123074Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a boiler that uses hot water, ethylene glycol, etc. as a heat medium.

Structure of the conventional example and its problems In the conventional boiler, as shown in Fig. 3, the heat medium in the can B that flows in from the return pipe A is heated by the heat exchange pipe C, and is transferred to a predetermined place from the outgoing pipe D. It is starting to flow into the The outgoing pipe D is opened to protrude close to the water surface E of the can body B so that the medium as high as possible in the can body B can flow out. However, due to this configuration, the above-mentioned outgoing pipe D
Air may be sucked into the interior along with the heat medium.
There were problems such as air pockets inside the pipes and air locks.

This problem can be solved by opening the outgoing pipe D away from the water surface E, that is, by opening it below, but in this case, the temperature of the heat medium sucked into the outgoing pipe D will be low, resulting in a decrease in efficiency. Problems such as inviting

Purpose of the invention The present invention was made in view of the above points, and aims to eliminate the air lock phenomenon without causing a decrease in efficiency.

Structure of the device In order to achieve the above object, the present invention has an inflow resistor arranged opposite to the opening of the outflow pipe, and this inflow resistor is formed in a U-shape, and the elastic force of both legs is used to prevent the inflow. It lands between the heat exchange pipes.

DESCRIPTION OF EMBODIMENTS One embodiment will be explained below with reference to FIGS. 1 and 2. 1 is a can body, 2 is a burner, 3 is a combustion chamber,
4 is a heat exchange pipe, 5 is an exhaust pipe, 6 is a heat medium return pipe, and 7 is a heat medium outgoing pipe, through which the heat medium is transferred to a predetermined location by a circulation pump 8.

As is clear from FIG. 2, the outgoing pipe 7 is disposed to pass through the group of heat exchange pipes 4, and its upper end opening 7a is located near the liquid level 9. and 1
0 is an inflow resistor disposed opposite to this opening 7a, which includes a flat plate portion 10a having a larger area than the opening 7a;
It consists of leg portions 10b extending from both ends thereof, and an arcuate portion 10c at the tip of the leg portion 10b snaps onto the heat exchange pipe 4. That is, this inflow resistor 10 utilizes the elastic force of its legs 10b to connect the heat exchange pipe 4.
It has landed on.

In the above configuration, when the circulation pump 8 is operated, the heat medium inside the can body 1 is sucked in through the opening 7a of the outgoing pipe 7 and transported to a predetermined location.

Here, the heat medium sucked into the outgoing pipe 7 flows from around the opening 7a to the opening 7a due to the presence of the inflow resistor 10, and even if the opening 7a is opened near the liquid level 9, air is not absorbed. There will be nothing to do. In other words, as shown by the broken line, suction from the upper part of the opening is eliminated. Further, since the opening 7a can be located near the liquid level 9, extremely high temperature heat medium can be sucked in, and efficiency can be increased.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, the problem caused by air trapping can be solved and efficiency can also be increased.

Furthermore, in this invention, the inflow resistor is attached to the heat exchange pipe, so there is no need for a special attachment part.
Moreover, since the elastic force of the legs is used for attachment, there is no need for processing such as welding, and there are no problems such as holes caused by changes over time, which have great effects.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a boiler according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line A--A in FIG. 1, and FIG. 3 is a cross-sectional view showing a conventional example. 1...Can body, 2...Heat source (burner), 4...Heat exchange pipe, 7...Outgoing pipe, 7a...Opening, 10
...Inflow resistor.

Claims (1)

[Scope of utility model registration request] It is equipped with a can body, a plurality of heat exchange pipes that heat the heat medium inside the can body, and an outgoing pipe that causes the heating medium inside the can body to flow out of the can body, and at a position opposite to the opening of the outgoing pipe. A boiler in which an inflow resistor is provided, the inflow resistor is formed in a substantially U-shape, and is elastically supported between heat exchange pipes by the elastic force of both legs of the inflow resistor.