JPH0429227Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is based on the registration number that the inventor previously applied for.
No. 1697429 relates to an exhaust gas backflow prevention device that is attached to the exhaust pipe of a multi-stage heating and water heater/dryer.

PRIOR ART

In general, exhaust gas from the combustion device of a water heater is normally discharged through a chimney at a small pressure difference, slightly higher than atmospheric pressure, due to the efficiency of the equipment. Therefore, strong winds from outside often push the exhaust gas back towards the exhaust stack or chimney, which can greatly disturb the combustion in the combustion chamber.

Once such a phenomenon occurs, combustion in the boiler is disturbed, and it takes time to return to a normal state, resulting in a major problem.

[Problem that the invention attempts to solve]

In the case of conventional exhaust stacks or chimneys, the installation of especially long ones due to environmental, topographical, and economical reasons has limited the length to several meters. For this reason, some were installed with wind-powered exhaust fans at the tips.

In contrast, this design installs a backflow prevention tube at the tip of the exhaust pipe, and in order to prevent strong winds and gusts of outside air from flowing directly back into the exhaust pipe etc., a number of bypass passages are constructed inside, and the exhaust port is also The object of the present invention is to provide a backflow prevention device that prevents strong wind from entering by having a large number of pores and a surrounding shielding plate.

[Means for solving problems]

In order to achieve the above object, the exhaust backflow prevention device of the present invention is provided with a cylindrical main body, a crown-shaped lid is installed on the upper part of the main body, and a large number of exhaust ports are provided on the periphery of the lower end of the main body. The lower end of the lid is fixed to the upper part of the main body together with the shield ring support member, and the upper plate, upper diaphragm, lower diaphragm, lower plate, etc. are fixed horizontally at appropriate intervals inside the main body, so that the main body can be fixed to the top, middle and upper parts. It is divided into five chambers: middle, lower middle, and lower, and a cylindrical exhaust introduction passage is formed between the lower chamber and the middle chamber, and the upper partition plate is positioned directly above this exhaust introduction passage. An opening is opened, and a cylindrical passage is formed to connect the upper middle chamber and the lower middle chamber, and in parallel with this, another cylindrical passage is formed to connect the lower middle chamber and the upper chamber. be.

〔Example〕

The embodiment will be described with reference to the drawings. In Fig. 1, a cylindrical main body 1 is provided, a crown-like lid 2 is mounted on the upper part of the main body 1, and a large number of exhaust ports 3 are provided on the periphery of the lower end of the main body 1. The lower end of the coronal lid 2 is fixed to the upper part of the main body 1 together with the shielding ring support member 4, and
A crown plate 5 with an inlet 6 in the center is fixed to the lower end, and inside the main body 1 there are an upper plate 7, an upper partition plate 8,
The lower partition plate 9 and the lower plate 10 are fixed horizontally at appropriate intervals, and the main body 1 is divided into upper A, middle upper B, middle C, middle lower D, and lower E.
Furthermore, a cylindrical exhaust introduction passage 11 is formed between the lower chamber E and the middle chamber C.
An opening 12 is formed in the upper partition plate 8 at a position directly above the upper middle chamber B, and a cylindrical passage 13 is formed to connect the upper middle chamber B and the lower middle chamber D. Room D
Another cylindrical passage 14 is formed to connect the upper chamber A and the upper chamber A.

[Effect]

The operation of the exhaust backflow prevention device of the present invention constructed as described above will be explained. The device is used by being attached to the exhaust stack of a water heater. First, the exhaust gas enters the lower chamber E from the inlet 6 of the lower annular disk 5 as shown by the arrow, enters the middle chamber C through the introduction passage 11, and then enters the middle chamber C, where it enters the opening 12.
From there, it enters the middle upper chamber B, passes through the cylindrical passage 13 and returns to the middle and lower chamber D, and from there it goes up the cylindrical passage 14 to the upper chamber A, hits the coronal lid 2, and descends.
It hits the outer shielding ring support member 4 from a large number of exhaust ports 3 provided on the periphery and is radiated upward into the atmosphere. In this way, the exhaust passage makes one round and a half detour from bottom to top and from top to bottom, and finally is dispersed from a large number of exhaust ports 3, hits the shield ring support member 4, and is radiated upward into the atmosphere. . Therefore, even if a strong wind or gust of wind blows, it is impossible for the exhaust port 3 to flow backward through these passages and reach the exhaust pipe below, and the role of backflow prevention can be reliably fulfilled.

[Effect of idea]

As explained above, in the backflow prevention device of the present invention, the exhaust gas from the exhaust pipe passes through a complicated detour path, is dispersed through a number of exhaust ports, and is discharged to the atmosphere, so that combustion heat is sequentially released during that time. By the time the temperature reached this device, it had fallen below the standard of 150℃.
In addition, as mentioned above, the shielding ring support member and complicated passage structure prevent combustion from being disturbed by backflow caused by strong winds or gusts, and the noise generated is low, contributing to complete combustion. be. In addition, the device has a simple structure, is not bulky, is easy to manufacture, is inexpensive, and has many other effects.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing the internal structure, FIG. 2 is a plan view, and FIG. 3 is a partially cutaway sectional view taken along the line XX in FIG. 1. ...Main body, 2...Coronal lid, 3...Exhaust port, 4
... Shielding ring support member, 5 ... Annular plate, 6 ... Inlet, 7 ... Upper plate, 8 ... Upper partition plate, 9 ... Lower partition plate,
10... lower plate, 11... exhaust introduction passage, 12... opening, 13... cylindrical passage, 14... cylindrical passage,
A...Upper chamber, B...Middle upper chamber, C...Middle chamber, D...
Middle lower chamber, E...lower chamber.

Claims (1)

[Scope of utility model registration request] A cylindrical main body is provided, a crown-shaped lid is installed on the upper part of the main body, a number of exhaust ports are provided at the periphery of the lower end of the main body, and the crown-shaped lid is fixed to the upper part of the main body together with a shielding ring support member at the lower end of the main body. An annular plate with an inlet opening in the center is fixed to the bottom end of the main body, and an upper plate, upper partition plate, lower partition plate, lower plate, etc. are fixed horizontally at appropriate intervals inside the main body. , divided into five chambers: upper middle, middle, lower middle, and lower, and a cylindrical exhaust introduction passage is formed between the lower chamber and the middle chamber, and an upper partition plate corresponding to the position directly above this exhaust introduction passage. An opening is made at the position, and a cylindrical passage is formed to connect the upper middle chamber and the lower middle chamber, and another cylindrical passage is formed parallel to this to connect the lower middle chamber and the upper chamber. An exhaust backflow prevention device for a water heater, characterized in that the exhaust gas introduced from the inlet is detoured upward and downward and is discharged to the exhaust port at the upper end.