INFRARED RAY GAS BURNER

Abstract

An infrared ray gas burner comprises an ignition valve, a nozzle, an ejector, a furnace chamber, a porous combustion radiant panel and an ignition needle. An ignition nozzle is placed in the furnace chamber, a sundries baffle is provided in the furnace chamber below the porous combustion radiant panel and above the ignition nozzle and the ignition needle is set above the porous combustion radiant panel, so the gas for ignition ejected from the ignition nozzle quickly mixes with the air inside the furnace chamber, and the gas-air mixture escapes from fire holes of the porous combustion radiant panel above the ignition nozzle. The gas concentration of the mixed gas is relatively high and suitable for igniting, the main burner can be quickly ignited, there is no black smoke, obviously incomplete combustion, and it brings a high ignition rate.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a U.S. National Stage entry under 35 U.S.C. §371 of International Application No. PCT/CN2012/082852, filed on 12 Oct. 2012, which claims benefit of Chinese Application No. 201210110806.7, filed on 13 Apr. 2012, which is hereby incorporated by reference in its entirety.

FIELD OF THE INVENTION

The present invention relates generally to a gas burner, and particularly to an improvement on the ignition system of a household infrared ray gas burner.

BACKGROUND OF THE INVENTION

With the improvement of people's living standards, gas utensils, such as home gas cooker, warmer and barbecue oven, have spread to millions of households; wherein, the infrared ray gas burner has been accepted by domestic customer, commercial user and industrial user, because it has obvious high performances on energy efficiency and environmental protection, cleanliness of health and safe and reliable. Since a larger relatively large primary air coefficient has been adopted by the infrared ray gas burner, and the burner will be normally ignited and combusted only after the air in the furnace chamber of the burner, which chamber is used for mixing burner gas with primary air and is fairly large, has been emptied, therefore, it is difficult to directly ignite the gas-air mixture escaping from a fire hole by pulse electrical sparkle or piezoelectric ceramic ignition, both of which are easy to produce deflagration when ignition, and generally the ignition is achieved by igniting the main burner via a start-up burner through an ignition nozzle. Meanwhile, for domestic infrared ray gas cooker, and specifically for built-in type cooker, considering the beauty of the cooker surface and sealing requirement, the ignition burner is installed outside the infrared main burner, such as the center, bottom and external of the burner outside burner, with adopting a certain elevation upward. Gas flows into the ignition support through the ignition nozzle and mixes with partial air, electric ignition sparkle ignite the mixed gas on the ignition support to form an ignition flame, and the ignition flame is fired into the main burner, so as to ignite the main burner. At present, the burners in the market have the following defects on ignition structure and operating mode:

1. In the way of igniting the burner from the outside of the burner by igniting on the external perimeter of the burner, its structural design must keep a certain gap between the burner and the disc or the cooker surface, otherwise, the main burner ignited by an ignition flame will be affected, but this structure obviously affects the appearance of the product, and makes the product be no vitality and no market value. In addition, the ignition flame is large, so the decorative sheet or the cooker surface around the burner will be blackened that obviously affects the appearance of the product, and at the same time, there is much incomplete combustion therein.

2. In the way of igniting the burner from outside flame by an ignition nozzle placed at the bottom of the burner, it needs a center channel to ignite the main burner. In the moment of igniting the start-up burner, flareback is likely to happen after the flame spurts and touches the ignition plate, which will burn in front of the start-up burner, and the transmission distance of the flame is not enough to reach the main fire hole or main fire plate, therefore resulting in misfire or deflagration.

3. In the way of igniting the burner from outside flame by an ignition nozzle placed at the bottom of the burner, it needs a center channel to ignite the main burner. Due to the limited diameter of the center channel, it has a certain obstruction against the transmission of the flame. When the piping gas pressure is low, the ignition flame cannot overcome the resistance to reach the main fire hole, resulting in misfire. When the piping gas pressure is high, the air in the center channel is quickly removing by the smoke generated by the ignition flame, and then the transmission of the flam is limited due to lack of oxygen in the channel.

4. In the way of igniting the burner from outside flame by an ignition nozzle placed at the bottom of the burner, it needs a center channel to ignite the main burner. Because the ignition center channel is small, the ignition flame is generally large and black and has obviously incomplete combustion, and the gas-air mixture of the main burner lags to reach the main ignition fire hole with low concentration; when ignition is not successfully achieved in the ignition moment, the ignition flame will be directed to the bottom of the burner, and due to the inertia of the flame, the ignition flame cannot stay on the surface or side face of the main ignition fire hole, and therefore cannot normally ignite the burner.

5. In the way of igniting the burner from outside flame by an ignition nozzle placed at the bottom of the burner, the structures of the ignition nozzle and the ignition support are more complex, so they are not easy to be installed at the bottom of the burner or in the narrow space of the center channel, and the reliability and precision of the installation are low, and therefore result in poor ignition performance of the product.

6. In the way of direct ignition through an ignition flame on the upper surface of the infrared ray combustion radiant panel, since the chamber volume of the infrared ray burner is large, it needs a long time for the gas-air mixture to extrude the original air in the chamber, and the concentration of the gas is low, so it is difficult to ignite and causes a low fire rate, especially when igniting by piezoelectric ceramics it is very difficult to achieve normal ignition.

Therefore, how to design and change the structure of the burner so as to improve the appearance and ignition reliability of the product becomes a tough technique problem in the product design of infrared ray gas burner for domestic and commercial use, especially in the design of built-in type infrared ray cooker at present.

SUMMARY OF THE INVENTION

The object of the invention is to improve the ignition structure of a burner and provide a new ignition integrated structure of infrared ray burner, so that the product will have beautiful appearance, high ignition reliability of burner, good combustion performance, simple and credible structure, and will be easy to install and adapted to a wide range of gas.

The technical solution of the present invention is as follows:

An infrared ray gas burner comprises an ignition valve 1, a nozzle 2, an ejector 3, a furnace chamber 4, a porous combustion radiant panel 5 and an ignition needle 6, an ignition nozzle 7 passes through the furnace chamber 4 and is settled in the chamber body of the furnace chamber 4 and below the porous combustion radiant panel 5, a sundries baffle 8 is provided in the furnace chamber 4 below the porous combustion radiant panel 5 and above the ignition nozzle 7, the ignition needle 6 is set above the porous combustion radiant panel 5 which is set above the ignition nozzle 7, the needle apex of the ignition needle 6 is placed 1 mm to 10 mm above the porous combustion radiant panel 5; the ignition needle 6 and the housing of the furnace chamber 4 can form an ignition circuit, wherein the housing of the furnace chamber 4 serves as an ignition negative pole, or alternatively an independent ignition negative pole 9 can be added; when the burner is a double ring burner, the ignition needle 6 and the sundries baffle 8 can be placed in the inner ring of the double ring burner, and they also can be placed in the outer ring of the double ring burner; the porous combustion radiant panel 5 can be porous ceramic radiant panel, metal mesh combustion radiant panel, metal fiber combustion radiant panel, metal honeycomb body combustion radiant panel, foam metal combustion radiant panel, wire mesh combustion radiant panel or metal hole combustion radiant panel; the ignition needle 6 meanwhile can be used as a flame ionization probe of a accidental flameout protection device. Therefore, when ignite the gas burner, open the ignition valve 1, and the ignition needle 6 generates an ignition spark above the porous combustion radiant panel 5 if the ignition nozzle 7 and the nozzle 2 both supply gas. Because the ignition nozzle 7 is placed in the furnace chamber 4, the gas for ignition ejected from the ignition nozzle 7 quickly mixes with the air inside the furnace chamber 4, the gas-air mixture escapes from fire holes of the porous combustion radiant panel 5 above the ignition nozzle 7, and the gas concentration is relatively high and suitable for igniting, the main burner can be quickly ignited. Due to the suitable dispersity and concentration of the ignition flame, there is no obviously incomplete combustion, no black smoke, and it brings a high ignition rate. The situation that the ignition nozzle 7 is blocked caused by sundries, such as fluids, filtering through the porous combustion radiant panel 5 during normal use, can be avoided by placing the sundries baffle 8 above the ignition nozzle 7 and below the porous combustion radiant panel 5. When the ignition needle 6 is used both as a flame ionization probe of an accidental flameout protection device and as an ignition needle for ignition flame, the circuit of the pulse controller can be designed such that the ignition needle 6 emits ignition sparks at the beginning of the ignition, and after the burner is ignited, the ignition needle 6 immediately becomes a probe for detecting the combustion flame signal of the burner.

The present invention can be used for domestic gas appliances, gas warmer, gas barbecue oven, gas drying plant, and so on, and the structures of the porous combustion radiant panel 5 and the furnace chamber 4 can be rounded, square, rectangle or other shapes; for the structure of the double ring burner, it can be inner and outer ring structure, or be left and right separated ring structure. For the burner with elongate structure, it can have two or more sets of ignition structures, each consisting of a ignition nozzle 7, a sundries baffle 8 and a ignition needle 6, and the two or more sets of ignition structures, as a whole, serve as the ignition system of the whole burner, so that the burner can be quickly ignited, and the flame can quickly spread to the whole ignition surface.

The present invention has the advantages of good performance in ignition, high reliability, good combustion performance, simple and credible structure, easy for installation and wide adaptation for gas.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention may be best understood by reference to the following description taken in conjunction with the accompanying drawings.

FIG. 1 shows a front section view of an embodiment of the present invention.

FIG. 2 shows a top view of the structure of an independent ignition negative pole 9 according to an embodiment of the present invention.

FIG. 3 shows a top view of the structure of using the body of a furnace chamber 4 as the ignition negative pole according to an embodiment of the present invention.

FIG. 4 shows a partial enlarged view of the structure of an ignition nozzle 7 according to an embodiment of the present invention.

FIG. 5 shows a front section view of the structure wherein the burner is a double ring burner and the ignition nozzle 7 is placed in the inner ring according to an embodiment of the present invention.

FIG. 6 shows a front section view of the structure wherein the burner is a double ring burner and the ignition nozzle 7 is placed in the outer ring according to an embodiment of the present invention.

FIG. 7 shows a partial enlarged top view of the structure wherein the burner is a double ring burner and the ignition nozzle 7 is placed in the outer ring according to an embodiment of the present invention.

FIG. 8 shows a top view of the structure wherein the burner is a double ring burner and the ignition nozzle 7 placed in the inner ring has an independent ignition negative pole 9 according to an embodiment of the present invention.

FIG. 9 shows a top view of the structure wherein the burner is a double ring burner and the ignition nozzle 7 placed in the outer ring has an independent ignition negative pole 9 according to an embodiment of the present invention.

FIG. 10 shows a top view of the structure wherein the surface of the burner is in combined shape with two sets of ignition structures, each consisting of a ignition nozzle 7, a sundries baffle 8 and a ignition needle 6, according to an embodiment of the present invention.

FIG. 11 shows a top view of the structure wherein the surface of the burner has a combined shape with only one set of ignition structures consisting of a ignition nozzle 7, a sundries baffle 8 and a ignition needle 6 according to an embodiment of the present invention.

FIG. 12 shows a top view of the structure wherein the surface of the burner has a rectangular shape according to an embodiment of the present invention.

FIG. 13 shows a top view of the structure wherein the surface of the burner has a square shape according to an embodiment of the present invention.

FIG. 14 shows a top view of the structure wherein the surface of the burner has a trapezoid shape according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Example 1 (FIGS. 1, 2 and 4)

An infrared ray gas burner for domestic use, comprises an ignition valve 1, a nozzle 2, an ejector 3, a furnace chamber 4, a porous combustion radiant panel 5 and an ignition needle 6, an ignition nozzle 7 passes through the furnace chamber 4 and is settled in the chamber body of the furnace chamber 4 and below the porous combustion radiant panel 5, a sundries baffle 8 is provided in the furnace chamber 4 below the porous combustion radiant panel 5 and above the ignition nozzle 7, the ignition needle 6 is set above the porous combustion radiant panel 5 which is set above the ignition nozzle 7, the needle apex of the ignition needle 6 is placed 3 mm above the porous combustion radiant panel 5, and the burner is provided with an independent ignition negative pole 9, which, together with the ignition needle 6, forms a ignition circuit; the burner is a simple ring burner; the porous combustion radiant panel 5 is a porous ceramic radiant panel. Therefore, when ignite the gas burner, the ignition valve 1 is opened, and the ignition needle 6 generates an ignition spark above the porous combustion radiant panel 5 if the ignition nozzle 7 and the nozzle 2 both supply gas. Since the ignition nozzle 7 is placed in the furnace chamber 4, the gas for ignition ejected from the ignition nozzle 7 quickly mixes with the air inside the furnace chamber 4, the gas-air mixture escapes from fire holes of the porous combustion radiant panel 5 above the ignition nozzle 7, and the gas concentration is relatively high and suitable for igniting, the main burner can be quickly ignited. Due to the suitable dispersity and concentration of the ignition flame, there is no obviously incomplete combustion, no black smoke, and it brings a high ignition rate. The situation that the ignition nozzle 7 is blocked caused by sundries, such as fluids, filtering through the porous combustion radiant panel 5 during normal use, can be avoided by placing the sundries baffle 8 above the ignition nozzle 7 and below the porous combustion radiant panel 5. The present invention has the advantages of good performance in ignition, high reliability, simple and credible structure, easy for installation and wide adaptation for gas.

Example 2 (FIGS. 1, 3 and 4)

It is substantially the same as Example 1, differing only in that the ignition negative pole of the ignition needle 6 is the housing of the furnace chamber 4.

Example 3 (FIGS. 1, 3 and 4)

It is substantially the same as Example 1, differing only in that the ignition negative pole of the ignition needle 6 is the housing of the furnace chamber 4, the ignition needle 6 is used both as a flame ionization probe of an accidental flameout protection device and as an ignition needle for ignition flame; the circuit of the pulse controller is designed such that the ignition needle 6 emits ignition sparks at the beginning of the ignition, and after the burner is ignited, the ignition needle 6 immediately becomes a probe for detecting the combustion flame signal of the burner.

Example 4 (FIGS. 5, 8 and 4)

It is substantially the same as Example 1, differing only in that the burner is a double ring burner, and the ignition nozzle 7 is placed in the inner ring.

Example 5 (FIGS. 6, 9, 4 and 7)

It is substantially the same as Example 1, differing only in that the burner is a double ring burner, and the ignition nozzle 7 is placed in the outer ring.

Example 6 (FIGS. 1, 2 and 4)

It is substantially the same as Example 1, differing only in that the porous combustion radiant panel 5 is a metal mesh combustion radiant panel.

Example 7 (FIGS. 10 and 4)

It is substantially the same as Example 1, differing only in that the structure of the porous combustion radiant panel 5 has two sets of ignition structures, each consisting of an ignition needle 6, an ignition nozzle 7 and a sundries baffle 8.

Example 8 (FIGS. 11, 12, 13, 14 and 4)

It is substantially the same as Example 1, differing only in that the structure of the porous combustion radiant panel 5 has a combined-shape, rectangular shape, square shape or trapezoid shape.

Claims

1. An infrared ray gas burner comprising:

an ignition valve, a nozzle, an ejector, a furnace chamber, a porous combustion radiant panel, and an ignition needle;

wherein an ignition nozzle passes through the furnace chamber and is settled in a body of the furnace chamber and below the porous combustion radiant panel, a sundries baffle is provided in the furnace chamber below the porous combustion radiant panel and above the ignition nozzle, the ignition needle is set above the porous combustion radiant panel that is set above the ignition nozzle, a needle apex of the ignition needle is placed 1 mm to 10 mm above the porous combustion radiant panel.

2. The burner of claim 1, wherein the ignition needle and a housing of the furnace chamber form an ignition circuit.

3. The burner of claim 1, wherein the burner is a double ring burner comprising an inner ring and an outer ring.

4. The burner of claim 1, wherein in that the porous combustion radiant panel is selected from the group consisting of a porous ceramic radiant panel, a metal mesh combustion radiant panel, a metal fiber combustion radiant panel, a metal honeycomb bodies combustion radiant panel, a foam metal combustion radiant panel, and a wire mesh combustion radiant panel or a metal hole combustion radiant panel.

5. The burner of claim 1, further comprising an accidental flameout protection device, and wherein the ignition needle comprises flame ionization probe of the accidental flameout protection device.

6. The burner of claim 1, wherein the porous combustion radiant panel has a shape selected from the group consisting of a circle, a rectangle, a square, a trapezoid or a combination thereof.

7. The burner of claim 2, wherein the housing of the furnace chamber is an ignition negative pole.

8. The burner of claim 2 wherein the ignition circuit further comprises, an independent ignition negative pole.

9. The burner of claim 3, wherein the ignition needle and the sundries baffle are placed in one of the inner ring or the outer ring of the double ring burner.

10. An infrared ray as burner comprising:

an ignition valve;

a nozzle extending from the ignition valve;

an ejector extending from the nozzle;

a furnance chamber connected with the ejector and comprising a porous combustion radiant panel disposed onto an upper surface of the furnance chamber, wherein an ignition needle is disposed adjacent the porous combustion radiant panel;

an ignition nozzle connected with the ignition valve and disposed within the furnance chamber below the porous combustion radiant panel; and

a sundries baffle disposed within the furnace below the porous combustion radiant panel.

11. The burner of claim 10, wherein the sundries baffle is positioned and above the ignition nozzle.

12. The burner of claim 10, wherein the ignition needle is positioned above the ignition nozzle.

13. The burner of claim 10, wherein the ignition needle comprises an apex, and wherein the apex is position 1 mm to 10 mm above the porous combustion radiant panel.