Upper air inlet combustor

Abstract

The invention relates to an upper air inlet combustor which comprises a base, wherein the base is provided with a concave cavity of which the opening is upwards and which is used for containing at least one first ejector; a first ejection channel which is arranged on the base and is in fluid connection with the base and the first ejector; a primary air channel which is arranged on the base; a burner cap and a transmission channel which are arranged on the base, and is characterized in that the first injection channel comprises a central cavity located in the center and a peripheral cavity surrounding the central cavity, an inlet of the central chamber is opposite to the first ejector, and the peripheral chamber is used for uniformly surrounding the primary air at the periphery of the central chamber. Compared with the prior art, the upper air inlet combustor has the advantages that by the sandwich structure design of the first injection channel, the gas in the center cavity can be better and more directly mixed with the primary air in the peripheral cavity, the uniformity of the primary air evenly distributed at the periphery of the center cavity is further improved, the primary air suction rate is increased, and meanwhile the phenomena of yellow flames and firepower weakness which are likely to occur during combustion are avoided.

Description

technical field [0001] The invention relates to a burner for a gas cooktop, in particular to a double-channel upward air-intake burner for a cooktop. Background technique [0002] At present, the upward-inflow gas stoves on the market are platform-type gas stoves and embedded gas stoves. The burners of the embedded gas stoves have a single-channel upward air-intake structure. The gas enters through one channel, and the gas firepower is controlled by a valve. Use inner fire ring gas. In order to solve the problem of single channel without independent central fire and small heat load, a Chinese patent with application number CN98120026.5 (publication number CN1212348A) discloses a simple structure, which can independently adjust the central fire and the outer ring fire. The gas burner, that is, this kind of burner is generally equipped with a center injector and an outer ring injector, but the combustion performance of this gas burner is found to be not ideal in the experimen...

AI Technical Summary

Problems solved by technology

[0002] At present, the upward-inflow gas stoves on the market are platform-type gas stoves and embedded gas stoves. The burners of the embedded gas stoves have a single-channel upward air-intake structure. The gas enters through one channel, and the gas firepower is controlled by a valve. Use inner fire ring gas

In order to solve the problem of single channel without independent central fire and small heat load, a Chinese patent with application number CN98120026.5 (publication number CN1212348A) discloses a simple structure, which can independently adjust the central fire and the outer ring fire. The gas burner, that is, this kind of burner is generally equipped with a center injector and an outer ring injector, but the combustion performance of this gas burner is found to be not ideal in the experiment, and the primary air is supplied to the center flame head and the outer flame The speed of the head is uneven, and due to the uneven suction of the center injector and the outer ring injector, the incomplete mixing of the gas and the primary air will also cause the flame length of the center fire and the outer ring fire to be different. At the same time, the ejector tube Restricted by the height of the upper air intake burner, it cannot be made too long, resulting in high channel resistance, and yellow flames are prone to appear when the power is high, especially in the small fire gear, the yellow flame is more obvious

[0003] And a Chinese utility model whose patent No. is ZL00233192.6 (authorized announcement number is CN2427756Y) provides a kind of solution for solving the above-mentioned problem: set up auxiliary passage beside the original single main passage, make the auxiliary passage directly lead to internal combustion ring, form The two channels of gas can enter the gas mixing chamber at the same time, and the main channel can be closed during combustion, and the secondary channel can be used alone. When the stove with this structure is in use, the inner and outer fire rings can be opened at the same time, and the outer fire ring can also be closed. The inner fire ring is used alone, and the fire power is controlled by the switch, which can not only achieve the purpose of cooking dishes, but also save gas and reduce pollution, but it only adds a secondary channel next to the main channel, and the main channel corresponds to the gas injector of the outer fire ring , the auxiliary channel corresponds to the inner ring fire gas injector, and the auxiliary channel is eccentrically arranged relative to the main channel, so that the pressure of the gas flowing out of the circumferentially arranged fire holes in the small fire cover corresponding to the auxiliary channel is uneven, resulting in the small fire cover. Inner ring fire with uneven flame

[0004] In order to avoid the problem of uneven flame, such as a Chinese utility model whose patent number is ZL201420414274.0 (authorized announcement number is CN204026673U) mentions an upper intake air burner, which includes a body seat fixed on the bottom shell, wherein the bottom shell is completely Closed, no holes at the bottom, three injectors on the body seat, two outer ring injectors and one inner ring injector, the body seat and the panel are fixed, after the body and the body seat are installed, the center line of the injector corresponds to the outer ring Venturi ri, the center line of the Venturi in the inner ring, because the high-speed fluid ejected by the injector is likely to generate negative pressure, so the air is drawn in at the Venturi, this part of the air does not flow into the body, and is directly obtained from the atmosphere and sent to the jet Near the injector, while the two outer ring injectors are located on both sides of the inner ring injector, the entire ring of the outer ring fire cover corresponding to the two outer ring injectors is connected, once one of the two outer ring injectors is blocked, the other The part of the gas sprayed by an outer ring injector will flow back through the outer ring fire cover and enter the gas channel corresponding to the blocked outer ring injector. If too much gas accumulates, it will easily cause an explosion

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