JPH0435687Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a forced combustion gas burner used in domestic water heaters and bathtubs.

[Prior art] In recent years, forced combustion type gas has been developed in which a fan is inserted into the intake and exhaust passages of household gas appliances such as water heaters and bathtubs to forcibly supply and exhaust combustion air. Instruments have come into use. Such forced combustion type gas appliances have a heat exchanger with improved heat absorption compared to natural exhaust type gas appliances, are smaller in size and have higher performance, and are versatile as household gas appliances. . The gas burners built into these forced combustion type gas appliances have multiple gas burners arranged side by side in a burner case, with primary air supplied into the gas burner body and secondary air rising along the sides of the gas burner body. Generally, the structure is such that air is forcibly blown using a fan.

[Problems to be solved by the invention] However, due to the demand for higher capacity and smaller size of household gas appliances, in order to increase the load of gas burners, if such gas burner bodies are arranged in high density,
Incomplete combustion of the flame occurred due to the lack of secondary air, making it difficult to achieve stable combustion.

[Means for solving the problems] This invention aims to solve the above problems by providing a forced combustion gas burner with a new configuration. In a forced-combustion gas burner arranged in parallel and configured to forcibly blow primary air supplied into the gas burner body and secondary air rising along the side of the gas burner body using a fan, Two rows of slit flame holes are formed along the side edges of the flame hole surface by sandwiching two comb-shaped members between a separator with a cross section that is inserted into the center of the surface and the inner surface of the gas burner body. The cross section V narrows the gas inlet, the mixing part of gas and primary air, and extends upward from the flame hole surface.
A flame holding plate with a horizontal shape bent outward at the upper end of the flame holding plate is integrally formed, and vertical slit holes with a burring surface formed inward at the notched end are held at alternating positions with the slit flame holes. Similar to a flame plate, the gas burner body is characterized in that the slit holes are arranged in a horizontal plane, and the gas burner body is constructed as a blank without intentionally opening any part of the slit holes.

Below, the configuration, operation, and effects of this invention will be specifically explained using the drawings.

[Embodiment] The drawing shows an embodiment of this invention, in which a gas burner body 2 made of sheet metal of this invention is constructed in parallel within a burner case 1, and includes a gas inlet 3, a mixing part 4 for gas and primary air, A flame hole surface 5 is formed, and two comb-like members 6 are sandwiched between a separator having a substantially square-shaped cross section inserted into the center of the flame hole surface 5 and the inner surface of the gas burner body 2. The notches 8 of 6 are communicated with the inside of the mixing part 4, and two rows of slit flame holes 9 are formed along the side edges of the flame hole surface 5. A flame stabilizing plate 10 having a V-shaped cross section is installed upwardly by narrowing the flame hole surface 5.
0, vertical slit holes 11 are arranged in two rows, upper and lower, in alternating positions with the slit flame holes 9, and a burring surface 12 is formed inward at the notched end of the vertical slit holes 11. A horizontal surface 14 on which a row of slit holes 13 is arranged is formed by bending outward at the upper end of the flame stabilizing plate 10, and the slit holes 13 are positioned at alternating positions with the vertical slit holes 11. One end portion 15 is left blank without being intentionally opened.

The above gas burner body 2 is made by processing two steel plates 16 in a substantially symmetrical manner and folding the ends 18.
The comb tooth-shaped member 6 and the separator 7 are fixed as described above, and the gas inlet 3, the mixing part 4, the flame hole surface 5, and the flame holding plate 1 are fixed.
0, the horizontal surface 14 is integrally formed.

An air inlet 21 is opened in the bottom surface 20 of the burner case 1 which is a horizontally long rectangular parallelepiped with an open top surface.A fan is connected upstream of the air inlet 21.
A secondary air baffle plate 2 is provided in the burner case 1 at an interval above the secondary air baffle plate 2, and a rising surface 23 from the secondary air baffle plate 22 is fitted with a certain gas inlet 3 of each gas burner body 2. Pitch circular air holes 2
4 are arranged side by side, and are covered with a side plate 25 with an interval between them and the bottom surface 20 and the secondary air rectifying plate 2.
A primary air passage 26 communicating with the air hole 24 is formed from the space between the primary air passage 26 and the primary air rectifying plate 27. It is formed by providing a large number of micropores by punching. The gas burner body 2 has a gas inlet 3 adapted to the air hole 24, a lower end thereof is held by the secondary air baffle plate 22, and is arranged horizontally in a row in the burner case 1 with the above-mentioned horizontal surface 14 abutting against each other, and the control device 28 A gas nozzle 29 protruding from the front surface is provided facing each air hole 24. A heat exchanger 30 is installed in the upper part of the burner case 1, and the combustion exhaust gas is discharged to the outside of the appliance body from an exhaust pipe (not shown) protruding from the upper surface of the heat exchanger 30. .

In addition, since the purpose of making the slit opening 13 blank is for the purpose of transferring fire from adjacent burner bodies, any part of the slit opening 13 may be made blank, without being limited to the front and rear ends 15. .

[Function] When the fan is operated by turning on the combustion switch,
A part of the combustion air flowing in from the air inlet 21 is rectified by the primary air straightening plate 27 from the primary air passage 26 and is supplied as primary air into the gas burner body 2 from the air hole 24 and the gas inlet 3. The secondary air is rectified by the secondary air rectifying plate 22 and rises along the side surface of the gas burner body 2 as secondary air. Combustible gas and primary air are mixed in the mixing part 4, flow into the notch 8, collide with each other, and are discharged from the slit flame hole 9, and secondary air is discharged from the slit vertical hole 11 formed in the flame stabilizing plate 10. is supplied and ignites and burns. Further, secondary air is also supplied from the slit opening 13 in the horizontal surface 14, and the front and rear ends 1
Since one part of No. 5 is left blank without being intentionally opened, the flame is collapsed in this part and interferes with the neighboring parts, so that the fire transfers smoothly.

[Effects] As described above, this invention has two comb-like members sandwiched between the separator, which is inserted into the center of the flame hole surface, and has a cross section that is approximately 〓-shaped, and the inner surface of the gas burner body. Since two rows of slit flame holes are formed along the edge, the gas and primary air collide and mix, and can be discharged from the slit flame holes as pressure-equalized combustible gas.

In addition, vertical slit holes were placed side by side on the flame stabilizing plate with two rows of slit flame holes along the side edges of the flame hole surface, and the slit holes were arranged in rows on the horizontal surface, so that the side surface of the gas burner body The secondary air rising along
The flame is rectified by colliding with the flame holding plate and the horizontal surface, and is discharged from the slit vertical holes and slit openings in an even pressure state, and a large amount of secondary air is always supplied, preventing red flame combustion and ensuring stable combustion. It can be realized.

In addition, since the flame stabilizing plate is formed into a V-shaped cross section, a large combustion area is obtained, making it possible to increase the load of the gas burner, and as mentioned above, the configuration allows a large amount of secondary air to be supplied. It is also permissible to juxtapose the gas burners in a dense manner, and it is possible to realize higher performance and smaller size of the gas burners as a whole.

In addition, secondary air is supplied from the slit openings in addition to the slit vertical holes, so it can be used even if the height of the flame holding plate is small, and as a result, the height of the burner case can also be designed to be small. This makes it possible to increase the combustion space between the burner and the heat exchanger, thereby achieving complete combustion and improving thermal efficiency at the same time.

In addition, since the slit flame holes and the slit vertical holes are positioned in an alternating relationship, the secondary air passes between the combustible gases, improving the mixing property of the secondary air and the combustible gases.
The aim is to improve the diffusivity of secondary air.

Furthermore, the burring surface formed in the vertical slit hole allows the flame to form without coming into contact with the flame holding plate, thereby improving the durability of the flame holding plate.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is a partially cutaway overall perspective view, Fig. 2 is a partially cutaway perspective view showing the assembly of the gas burner body, and Fig. 3 is a partially broken perspective view of the gas burner body.
4 is a sectional view taken along the line AA in FIG. 1, FIG. 5 is an exploded perspective view of the main parts, and FIG. 6 is an exploded plan view of the gas burner body. DESCRIPTION OF SYMBOLS 1... Burner case, 2... Gas burner body, 3... Gas inlet, 4... Mixing part, 5... Flame hole surface, 6... Comb tooth-shaped member, 7... Separator, 9...
... Slit flame hole, 10 ... Flame holding plate, 11 ... Slit vertical hole, 12 ... Burring surface, 13 ... Slit opening, 14 ... Horizontal surface.

Claims (1)

[Claim for Utility Model Registration] A plurality of gas burner bodies are arranged side by side in a burner case, and primary air supplied into the gas burner bodies and secondary air rising along the sides of the gas burner bodies are supplied by a fan. In a forced-combustion gas burner configured to forcefully blow air, two comb-like members are sandwiched between a separator with a cross section that is inserted into the center of the flame hole and the inner surface of the gas burner body. Two rows of slit flame holes are formed along the side edges of the flame hole surface, and a gas inlet, a gas mixing part with the primary air, a V-shaped flame holding plate with a V-shaped cross section extending upward by narrowing the flame hole surface, and a storage A horizontal plane bent outward at the upper end of the flame plate is integrally formed, and slit vertical holes with an inward burring surface formed at the notched end are arranged parallel to the flame holding plate at alternating positions with the slit flame holes. A forced combustion type gas burner characterized in that openings are arranged in a row in a horizontal plane, and the gas burner body is constructed as a blank without intentionally opening any part of the slit openings.