JPH0468208A - Gas supplying/discharging device for combustion equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an air supply/exhaust system that supplies air from outdoors and exhausts air outdoors.

(Prior Art) Conventionally, a supply cylinder is provided around the outer periphery of an exhaust stack, an exhaust outlet is provided on the peripheral wall of the exhaust pipe that protrudes from the tip of the supply cylinder, and a first Publication No. 1-310222 discloses an air supply/exhaust system that is provided with a flange and that has a second flange attached to the exhaust pipe that protrudes from the tip of the air supply cylinder, and uses the gap formed between both flanges as an air intake port. is shown.

(Problem to be Solved by the Invention) However, this device aims to improve the supply and exhaust characteristics by increasing the flow velocity of exhaust gas when it passes through the exhaust outlet, but as shown in FIG. Since the angle that the front surface of flange a makes with the exhaust pipe is larger than 90@, especially when wind is received from the front of the air supply/exhaust system as shown by the arrow, the exhaust gas coming out from the exhaust outlet will pass through the second flange a. After flowing along the front surface, it flows into the supply cylinder d from the air supply port C, causing a problem in that it adversely affects combustion in the combustion appliance.

SUMMARY OF THE INVENTION An object of the present invention is to provide an air supply and exhaust system for a combustion appliance that is free from such problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a supply cylinder surrounding the outer periphery of the exhaust pipe, and a peripheral wall of the exhaust pipe that protrudes from the tip of the supply cylinder for exhaust gas. providing an outlet, providing a first flange at the tip of the feed cylinder, and attaching the second flange to a portion of the exhaust pipe that protrudes from the tip of the feed cylinder;
When the gap formed between both flanges is used as an air supply port, the angle that the front surface of the second flange makes with the exhaust pipe is 90°.
The second flange is set at an angle smaller than .degree., and a predetermined distance is provided between the outer periphery and the rear end edge of the exhaust outlet to form an exhaust diffusion space in the front surface of the second flange.

(Function) As shown in Figure 3, in the air supply and exhaust system for a combustion appliance having the above configuration, when strong wind is received from the front of the system, the exhaust from the exhaust outlet is The vortex generated in the diffusion space in front of the flange mixes with the wind, so even if some of it flows into the air supply port, it will not adversely affect combustion.

Also, if weak wind is received from the front of the air supply/exhaust system,
As shown in the figure, since there is a predetermined distance between the outer periphery of the second flange and the rear edge of the exhaust outlet, the exhaust gas diffuses before reaching the air supply port and does not flow into the air supply port. .

Furthermore, as shown in Figure 5, when strong wind is received from the side of the air supply/exhaust system, the wind pressure also acts on the exhaust outlet and acts in a direction to suppress the outflow of exhaust gas. Since the wind pressure acts on the air, the two are balanced and air supply and exhaust are not deteriorated.

(Example) An example of implementing the present invention will be described with reference to the attached drawings.

In the drawings, 1 indicates a wall such as the outer wall of a house, 2 indicates a through hole bored in the wall 1, and 3 indicates an air supply/exhaust device supported by the through hole 2.
The air supply and exhaust system 3 consists of an exhaust pipe 4 and a supply cylinder 5 provided around the outer periphery of the exhaust pipe 4.
A protrusion 4A protrudes forward from the tip of the protrusion 4A, and an exhaust outlet 6 is formed in the peripheral wall of the protrusion 4A.

The tip of the feed cylinder 5 is provided with a first flange 7, and the second flange 8 is attached to the protruding portion 4A of the exhaust pipe 4 that protrudes from the tip of the feed cylinder 5. The space formed between 7 and 8 is defined as the air supply port 9, and the exhaust pipe 4
The tip of A was closed with a spindle-shaped closing plate 10 extending into the exhaust pipe 4.

The configuration up to now is not particularly different from what is conventionally known.

In the present invention, the angle between the front surface 8a of the second flange 8 and the exhaust pipe 4 is set to be less than 90 degrees, and the angle between the outer peripheral front surface 8b of the second flange 8 and the exhaust outlet 6 is set to be less than 90 degrees. An exhaust gas diffusion space 11 is formed in the front face of the second flange 8 with a predetermined distance p between the rear end edge and the exhaust pipe 4.
The length of the first exhaust pipe 4a, which has the closing plate 10 at its tip, is slidably inserted into the second exhaust pipe 4b, which has a connection port 12 connected to a combustion device (not shown) at its rear end, to adjust its length. The feed cylinder 5 includes a first feed cylinder 5a having a connection port 13 connected to a combustion device (not shown) at the rear end and a threaded portion 14a at the tip side; Threaded part 14
The wall 1 is provided with a threaded portion 14b that is screwed into the inside of the wall 1 at the rear end.
a second feed cylinder 5b equipped with a third flange 15 that contacts the indoor wall surface of the cylinder; It consists of a third exhaust pipe 4C with a mating threaded part 14c, and the second feed cylinder 5b is screwed onto the outer periphery of the first feed cylinder 5a in advance, and then the first feed cylinder 5a and the third feed cylinder 5b are screwed together. Supply cylinder 5
By screwing C, both feed cylinders 5a and 5C are fixed to the through hole 2, and then the first feed cylinder 5 is inserted into the second feed cylinder 5b.
The installation of the feed cylinder 5 into the through hole 2 is completed by screwing the parts a.

The attachment portion of the first flange 7 to the supply cylinder 5 and the attachment portion of the second flange 8 to the exhaust tube 4 are provided with curved portions that curve in the same direction, thereby preventing ventilation from the air supply port 9. The air is made to smoothly flow into the supply passage formed between the outer circumference of the exhaust pipe 4 and the inner circumference of the supply cylinder 5.

The air supply/exhaust system 3 is constructed by attaching a feed cylinder 5 having a diameter of about 60 cm to the outer periphery of an exhaust pipe 4 having a diameter of about 40,131 mm so as to surround it via a spacer 16, and connecting the outer periphery of the exhaust pipe 4 and the feed cylinder 5. An air supply passage is formed between the exhaust pipe 4 and the inner periphery, and the exhaust pipe 4 protrudes approximately 95 cm from the tip of the supply pipe 5,
, six slit-shaped slits are arranged at equal intervals in the circumferential direction of the exhaust pipe 4 over a distance of about 45 mm from the tip of the protrusion 4a to form an air outlet 6, and the rear end of the exhaust outlet 6 the rim and the second
The second flange 8 was attached with a distance of about 35 degrees between the second flange 8 and the outer peripheral front surface of the second flange 8.

The angle that the front surface of the second flange 8 makes with the exhaust pipe 4 is approximately 8.
It was set to 0''.

In this case, as shown in FIG. 3, when strong wind is received from the front of the air supply/exhaust system, the exhaust from the exhaust outlet 6 is mixed with the wind due to the vortex generated in the diffusion space 11 in front of the second flange 8. Since it is stirred and diluted, even if a part of it flows into the air supply port 9, it will not have an adverse effect on combustion.

In addition, since the slits are formed in the shape of slits and six of them are arranged at equal intervals in the circumferential direction, wind can flow into the diffusion chamber 11 through the gap between the exhaust outlets 6 and 6 without being obstructed by the exhaust gas. However, this allows better dilution of the exhaust gas in the diffusion chamber 11.

Also, if weak wind is received from the front of the air supply/exhaust system,
As shown in the figure, the outer periphery of the second flange 8 and the exhaust outlet 6
Since there is a predetermined distance l between the rear end edge and the rear end edge, the exhaust from the exhaust outlet 6 is diffused before reaching the air supply port 9 and does not flow into the air supply port 9.

Further, as shown in FIG. 5, when strong wind is received from the side of the air supply/exhaust device, the wind pressure also acts on the exhaust outlet 6 and acts in a direction to suppress the outflow of exhaust gas. Since the wind pressure acts on both, the two are balanced and air supply and exhaust are not deteriorated. As described above, this exhaust system performs air supply and exhaust well, and can be applied to pot-type oil combustors and the like where the pressure inside the combustion chamber is relatively low, such as 4111H20.

(Effects of the Invention) According to the present invention, the angle between the front surface of the second flange and the exhaust pipe is set to be less than 90°, and there is a gap between the outer periphery and the rear end edge of the exhaust outlet. Since the exhaust gas diffusion space is formed in the front face of the second flange at a predetermined distance, it is possible to easily create the exhaust gas diffusion space in the front face of the second flange without making the exhaust pipe protrude greatly from the wall. Even when strong winds are received from the front, where exhaust gas is most likely to enter the air supply port, the exhaust gas entering the air supply port can be diluted, resulting in adverse effects on combustion due to exhaust entering the air supply port. It is effective in eliminating the problem.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional side view of an example of the embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line ■-■ Figs. FIG. 4... Exhaust pipe 5... Supply cylinder 6... Exhaust outlet 7... First flange 8... Second
3 people outside the flange

Claims (1)

[Claims] 1. A supply cylinder is provided on the outer periphery of the exhaust pipe to surround it, an exhaust outlet is provided on the peripheral wall of the exhaust pipe that protrudes from the tip of the supply cylinder, a first flange is provided at the tip of the feed cylinder, and the cylinder is provided with a first flange. The second part is attached to the part of the exhaust pipe that protrudes from the tip of the supply cylinder.
flange is attached, and the gap formed between both flanges is used as an air supply port, the angle between the front surface of the second flange and the exhaust pipe is set to be less than 90°, and the outer periphery is set to an angle smaller than 90°. An air supply/exhaust device for a combustion appliance, wherein an exhaust diffusion space is formed in the front face of the second flange with a predetermined distance between the second flange and the rear end edge of the exhaust outlet. 2. The air supply and exhaust system for a combustion appliance according to claim 1, wherein the exhaust outlet is an elongated hole extending in the length direction of the exhaust stack, and a plurality of the elongated holes are arranged at equal intervals in the circumferential direction of the exhaust stack.