JPS6155510A - Burning equipment - Google Patents

Abstract

PURPOSE:To miniaturize a burner and to prevent generating squeaky noise from the burner by a method wherein a packing, a burner case, a metal screen for the flame hole and a burner frame are laminated and burner frame is caulked at its end surface with the burner case flanged portion. CONSTITUTION:A burner case 21, the metal screen for flome holes 22, a burner frame 23 and a burner case cover 24 are caulked through a packing 25. The primary air is induced by the ejector effect caused by gas jetting from a nozzle and by suction power of a fan, and is moved through a float unit together with the gas. The air and the gas are promoted to mix together, when their movemove are in the bottom deeply tapered down ward portion 21c, causing slowdown of speed, and the further mixing up are promoted in the baffle 30. The gas mixture are passing through the circular arc-face unit, in linear shape 21d and are gradually burning in flame holes. By this device, it is possible to miniaturize the burner structure and also to prevent generating a squeaky noise from the burner.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the structure of a burner for burning gas used in combustion devices such as gas stoves and gas hot air blowers.

Conventional structure and its problems Conventionally, in this type of combustion device, there are gas stoves with high NOx in the burner and exhaust gas constantly discharged into the living space;
Gas fan heaters and the like have been required to have low NOx emissions. On the other hand, due to the narrowness of living space, there was a desire for smaller combustion devices. Conventional burners were large, so it was difficult to use them in gas fan heaters, etc., which required a thinner and more compact size. It had the disadvantage that it could not be done. Furthermore, in order to save labor and operate sparingly, many fan heaters operate in a high-temperature-low-temperature-stop mode, and in this case, the burner temperature differs between when the burner is burning and when it is not burning. As a result, when the burner is heated and cooled, thermally expanding acid and condensation noise are produced frequently, which causes an unpleasant abnormal noise during use.

For example, the conventional full-order burner shown in FIG. 1 is shown in perspective view. The periphery of the flame hole 1 of the burner is caulked with a frame 2, and is mainly composed of a left side plate 3 and a right side plate 8 (shown in Fig. 2) facing each other, and 4 is a primary air suction for gas. This is the throat part of. To show the details of the burner, Figure 1
-Y cross section is shown in Fig. 2. In FIG. 2, a lath net 5 and a punching plate 6 are shown to make the gas concentration distribution in the burner completely uniform.
The gasket 7 is supported by the left side plate 3 and the right side plate 8, and is caulked by the frame 2 from above.

On the other hand, around the burner, as shown in FIGS. 1 and 2, the left side plate 3 was covered with the right side plate 8, and the periphery was caulked with a groove.

In the burner of this conventional combustion device, in order to reduce NOx, the primary air ratio of the burner is set around 120%, and NOx is reduced.
Although it was possible to reduce the amount of X to less than IQPPM, there was a drawback that the burner was too high because the gas flowed from the throat portion 4 of the burner to the flame hole 1 after making a U-turn. In order to make the burner temperature of the flame hole 1 uniform, it is composed of a lath mesh 5 and a punching plate 6, so when the burner is heated, the wire mesh forming the flame hole 1, the lath mesh 5 and the punching plate 6 did not rise with the same temperature distribution and there was a difference in heat transfer, which caused a squeaking sound at each of the metal contact points. Also, when the burner cools down, the wire mesh and lath of flame hole 1 There was a drawback that a temperature difference was likely to occur at the contact surface between the net 5 and the punching plate 6, and a cracking sound was generated from the burner.

Purpose of the Invention The present invention solves the above-mentioned problems of the conventional technology.
An object of the present invention is to provide a combustion device in which the structure of a burner is reduced in size and the creak noise of the burner is not generated.

Structure of the Invention In order to achieve the above-mentioned object, the combustion device of the present invention includes a burner case molded into a substantially U-shape, a flame hole wire mesh, a burner frame, a burner case lid, and a gasket, and the lower part of the burner case is used for gas suction. A throat section that continuously tapers upward from the end of the burner to the tip of the burner, a deep tapered section that tapers downward, a linear arc surface, and an upwardly slanted tip are integrally molded, and the upper opening edge. A flange part is provided on the flange part, and the gasket, burner case lid, flame hole wire mesh, and burner frame are stacked on the flange part marked ViJ, and the end face of the burner frame is caulked to the burner case flange part, thereby reducing the size of the burner. , and has the effect of preventing the burning sound.

DESCRIPTION OF EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The third article is about a gas hot air heater that employs a burner, which is the combustion device of the present invention. 9 is the main body base, 10 is the exterior case, 11 (l″l: warm air outlet, 12 is the power/wide switch, 13 is the temperature control knob, and 14 is the power lamp).

In FIG. 4, 15 is a gas control mechanism such as a gas cock, 16 is a gas conduit, 17 is a burner in an embodiment of the present invention, 18 is a combustion chamber, 19 is a blower fan, and 20 is a blower fan motor.

5 to 7 show details of the burner 17. Reference numeral 21 designates a burner case having a horizontal flange 21a formed on the upper opening edge, and having a substantially U-shaped cross section and a divided cylindrical shape.
The bottom surface extends from the gas suction side to the burner tip side.
A throat part 27 that is tapered upward and a part 2 that is tapered and deepened downward following this throat part 27.
IC1 This part 2 A linear arcuate surface 21d connected to IC,
The tip portion 2 that is inclined upwardly on this arcuate surface 21d
The mixing pipe section consisting of 18 parts is integrally molded and has grooves. 2
2 is a substantially planar flame hole wire mesh, 23 is a burner frame, 24 is a burner case lid made of a flat metal plate having an elongated opening 24a, and 25 is a gasket. A throat portion 27 is formed on the nozzle 26 side by the burner frame 23 and burner case 21.
is formed so that gas can be easily sucked through the damper 28. 29 is a burner receiving plate for attaching the nozzle 26 and the like to the burner, and is fixed to the burner case 21 and the burner frame 23. The inner bottom surface of the burner case 21 is formed into a tapered shape from the gas suction part to the burner tip, and after providing a throat part 27, it is deepened into a tapered shape and a partially arcuate surface is formed, and then reaches the burner case tip. It is. The buff JV30, which is installed upright on the inner bottom of the burner case C21 and faces the gas flow, is installed so that the sucked gaff and primary air are distributed to the burner flame hole wire mesh 22 so that the mixture to be combusted becomes uniform. It is being 31 is an ignition electrode insulator, 32 is an ignition electrode, and 33 is a primary combustion chamber.

The operation of the above configuration will be explained below.

In the combustion device configured in this way, the nozzle/l/2
The gas ejected from the main body 6 sucks the surrounding air through the damper 28 by the ejector effect of the throat part 27, and the gas and primary air are mixed. At this time, the damper 26 is set so that the primary air ratio is around 120%, and NOx
Set it so that it does not become too high. The mixed gas and primary air are further homogenized using a buff/l/30 so as to have a uniform temperature distribution and a uniform gas concentration on the flame hole surface. or,
Since the burner case 21, the flame hole wire mesh 22, the burner frame 23, and the burner case lid 24 are swaged together through the gasket 25, there is no lath mesh 5 and punching plate 6 as in the conventional case, so that the metal comrades are separated at the swaged portion. Since there are few contact parts, squeaking noise is less likely to occur during heating and cooling.Also, primary air is sucked by the ejector effect due to the gas gamma output from the nozzle and the suction force of the fan, and the gas and primary air that pass through the throat part are sucked. Mixing is promoted when the flow velocity of the gas and primary air decreases in the tapered downwardly deepened portion 2IC, and the mixing is further promoted by the buff 7v30. The mixed gas passes through the linear arcuate surface 2id portion, and the mixed gas gradually burns on the flame hole surface. The last remaining mixed gas rises at the tip 216 and burns at the flame hole surface.

According to this embodiment, since the burner case is molded into a roughly U-shaped divided tube shape, the height of the burner can be reduced and the burner can be made compact. This has the effect of making it smaller.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) Since the burner case is molded into a U-shaped divided tube shape, the height of the burner can be reduced and the burner can be of any length, making it possible to provide a thin and compact combustion device.

(2) Compared to the conventional example, the drawing process of the burner case is simple, so the mold cost and number of parts for burner processing are small, and costs can be significantly reduced.

0) Squeaking noise during heating and cooling of the burner is reduced.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional burner, Fig. 2 is a sectional view of the conventional burner taken along the line X-Y in Fig. 1, and Fig. 3 is an external perspective view of a combustion device that is an embodiment of the present invention. 4 is a cross-sectional view of a main part of a combustion device which is an embodiment of the present invention, FIG. 5 is a cross-sectional view of a burner portion of a combustion hum device which is an embodiment of the present invention, and FIG. Main part sectional view taken along the Y-Z line in Figure 5, No. 7
The figure is a plan view of a burner that is an embodiment of the present invention. FIG. 8 is a plan view of a burner case lid according to an embodiment of the present invention. FIG. 9 is a plan view of a Burnakeme according to an embodiment of the present invention. 21... Burner case, 22... Flame hole wire mesh, 23... Burner frame, 24... Burner case lid, 25... Gasket. Names of the 11 representatives: Patent attorney Toshio Nakao and one other person Figure 1 × Figure 2 Figure 3 Figure 4 Figure 6? l Figure 7 2? z3 Figure 9

Claims (1)

[Claims] A burner case molded into a substantially U-shaped divided cylinder shape with an open top surface, a flame hole wire mesh, a burner frame, a burner case lid,
The lower surface of the burner case has a throat section that tapers continuously upward from the gas suction section to the tip of the burner, a deep downward tapered section, a linear arcuate surface, and an upwardly tapered throat section. A slanted tip is integrally molded, and a flange is provided on the edge of the upper opening, and the flange is provided with a packing, a burner case lid, a flame hole wire mesh,
A combustion device in which burner frames are overlapped and the end face of the burner frame is caulked to the burner case flange.