CN118794019A - An infrared burner emitting system - Google Patents

Abstract

The present invention belongs to the technical field of household gas stoves, and provides an infrared burner injection system, including a casting body and an injector arranged in sequence along the airflow direction, the injector including a multi-channel nozzle and an injector tube, and the injector tube including a contraction tube, a mixing tube and a diffuser tube arranged in sequence along the airflow direction. The casting body is arranged at the front end along the airflow direction, and the casting body includes a main airflow channel and a secondary airflow channel; the multi-channel nozzle includes a main nozzle and a secondary nozzle, the main nozzle is coaxially arranged with the injector tube, and the secondary nozzle is arranged at a circumference around the main nozzle as the center; the main airflow channel is connected to the main nozzle, and the secondary airflow channel is connected to the secondary nozzle. The present invention adopts a multi-jet injection technology formed by combining the main nozzle and the secondary nozzle, and combines the structural design of the infrared-specific injector tube and the porous combustion plate, which can strengthen turbulence and the application of rotating airflow to strengthen combustion, improve the ability of primary air injection, and has the practicality of increasing heat load.

Description

An infrared burner emitting system

Technical Field

The invention belongs to the technical field of household gas cookers, and in particular relates to an infrared burner emitting system.

Background Art

Under normal circumstances, the burner includes an ejector and a burner head. The ejector has the following functions: first, it ejects low-energy gas with high-energy gas and mixes the two evenly; second, it forms the required static pressure at the end to overcome the resistance loss of the airflow at the burner head and obtain the necessary speed to ensure the stable operation of the burner; third, it delivers a certain amount of gas to ensure the heat load required by the burner.

Existing infrared burners are basically designed and applied according to natural induced draft fully premixed combustion, where the ejector includes a nozzle, a contraction tube, a mixing tube and a diffuser, and all of them are in a one-to-one correspondence. However, there are currently application defects such as a large burner head diameter and low heat load, which has a large room for innovation and improvement.

Summary of the invention

In order to overcome the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an infrared burner emitting system.

The technical solution adopted by the present invention to solve the technical problem is:

An infrared burner ejection system comprises a casting body and an ejector arranged in sequence along an airflow direction, the ejector comprises a multi-channel nozzle and an ejection pipe, and the ejection pipe comprises a contraction pipe, a mixing pipe and a diffuser pipe arranged in sequence along the airflow direction;

The casting body is arranged at the front end along the airflow direction, and the casting body comprises a main airflow channel and a secondary airflow channel;

The multi-channel nozzle comprises a main nozzle and a secondary nozzle, wherein the main nozzle is coaxially arranged with the ejector tube, and the secondary nozzle is arranged at a circumference around the main nozzle as the center, and the secondary nozzle is arranged parallel to or obliquely with the main nozzle;

The main air flow channel is connected to the main nozzle, and the secondary air flow channel is connected to the secondary nozzle.

Preferably, the main nozzle comprises a main nozzle air intake section, a main nozzle contraction section and a main nozzle ejection section which are sequentially arranged along the airflow direction.

Preferably, the main nozzle includes a main nozzle contraction section, a main nozzle injection section, a main nozzle primary air replenishment section and a main nozzle air outlet section which are arranged in sequence along the airflow direction. A plurality of nozzle primary air replenishment holes are provided in the main nozzle primary air replenishment section and along the normal direction of the main nozzle. The nozzle primary air replenishment holes are arranged in communication with the main nozzle primary air replenishment section.

Preferably, the auxiliary nozzle comprises an auxiliary nozzle air inlet section, an auxiliary nozzle contraction section and an auxiliary nozzle ejection section which are sequentially arranged in the airflow direction.

Preferably, the auxiliary nozzle includes an auxiliary nozzle contraction section, an auxiliary nozzle injection section, an auxiliary nozzle primary air replenishment section, and an auxiliary nozzle air outlet section which are arranged in sequence along the airflow direction. A plurality of nozzle primary air replenishment holes are provided in the auxiliary nozzle primary air replenishment section and along the normal direction of the auxiliary nozzle. The nozzle primary air replenishment holes are connected to the auxiliary nozzle primary air replenishment section.

Preferably, the structure of the main nozzle primary air replenishment section is the same as that of the secondary nozzle primary air replenishment section, the cross-section of the main nozzle primary air replenishment section is a polygonal structure, the nozzle primary air replenishment hole is a circular hole structure, the nozzle primary air replenishment hole is arranged at the polygonal end face of the main nozzle primary air replenishment section or the secondary nozzle primary air replenishment section, and the direction of the nozzle primary air replenishment hole is normal or inclined to the airflow direction.

Preferably, the number of the primary air replenishment holes of the nozzle is n*(1-N), wherein n is the number of columns along the air flow direction, and N is the number of polygons of the primary air replenishment section of the main nozzle or the primary air replenishment section of the auxiliary nozzle.

Preferably, the outer diameter of the auxiliary nozzle air outlet section is smaller than the outer diameter of the main nozzle air outlet section, and the outer diameter of the auxiliary nozzle introduction section is smaller than the outer diameter of the main nozzle introduction section.

Preferably, the diameter of the circle formed by the air outlet section of the auxiliary nozzle around the main nozzle as the center is smaller than the diameter of the end face of the contraction tube.

Preferably, the shrinkage angle of the shrinkage tube is set to 26.8° to 32.2°;

The ratio of the inlet diameter to the outlet diameter of the mixing tube is in the range of 2.08:1 to 2.18:1;

The ratio of the length to the diameter of the mixing tube ranges from 1.5:1 to 2.5:1;

The diffusion angle of the diffuser tube ranges from 6.2° to 7.8°.

Compared with the prior art, the beneficial effects of the present invention include:

The infrared burner injection system of the present application has a reasonable structural design, adopts a multi-jet injection technology formed by combining the main nozzle and the auxiliary nozzle, and combines the structural design of the infrared-specific injection tube and the porous combustion plate. The main nozzle and the injection tube are coaxially arranged, and the auxiliary nozzle and the injection tube are non-coaxially arranged. The structure can strengthen the turbulence and use the rotating airflow to strengthen the combustion, improve the ability of primary air injection, and the gas and air are mixed more evenly than before. The ejection speed of the gas through the burner fire hole is increased, and the infrared stove has a unique porous combustion plate, and the burner combustion stability is further enhanced. It can not only meet the user's demand for stir-frying and heavy-load cooking, but also has a very significant practical effect.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

FIG1 is a perspective schematic diagram of a first embodiment of the present invention;

FIG2 is a top view of a first embodiment of the present invention;

FIG3 is a transverse cross-sectional view of FIG2 ;

FIG4 is a cross-sectional view of a main nozzle according to a first embodiment of the present invention;

5 is a cross-sectional view of a secondary nozzle according to a first embodiment of the present invention;

FIG6 is a perspective schematic diagram of a secondary nozzle according to a first embodiment of the present invention;

FIG7 is a perspective schematic diagram of an ejector tube according to a second embodiment of the present invention;

FIG8 is a perspective schematic diagram of a main nozzle according to a third embodiment of the present invention;

FIG. 9 is a perspective schematic diagram of a sub-nozzle according to a fourth embodiment of the present invention.

in:

1: Casting body;

1-1: main airflow channel; 1-2: secondary airflow channel;

2: Ejector;

2-1: Multi-channel nozzle;

2-1-1: main nozzle; 2-1-1-1: main nozzle air intake section; 2-1-1-2: main nozzle contraction section; 2-1-1-3: main nozzle ejection section; 2-1-1-4: main nozzle primary air replenishment section; 2-1-1-4-1: nozzle primary air replenishment hole; 2-1-1-5: main nozzle air outlet section;

2-1-2: auxiliary nozzle; 2-1-2-1: auxiliary nozzle air intake section; 2-1-2-2: auxiliary nozzle contraction section; 2-1-2-3: auxiliary nozzle injection section; 2-1-2-4: auxiliary nozzle primary air replenishment section; 2-1-2-5: auxiliary nozzle air outlet section;

2-2: ejector tube; 2-2-1: contraction tube; 2-2-2: mixing tube; 2-2-3: diffuser tube.

DETAILED DESCRIPTION

In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

First embodiment:

Referring to FIGS. 1 to 6 , an infrared burner ejection system includes a casting body 1 and an ejector 2 sequentially arranged along the airflow direction, the ejector 2 includes a multi-channel nozzle 2-1 and an ejector tube 2-2, and the ejector tube 2-2 includes a contraction tube 2-2-1, a mixing tube 2-2-2 and a diffuser tube 2-2-3 sequentially arranged along the airflow direction;

The casting body 1 is arranged at the front end along the air flow direction, and the casting body 1 includes a main air flow channel 1-1 and a secondary air flow channel 1-2;

The multi-channel nozzle 2-1 includes a main nozzle 2-1-1 and a sub-nozzle 2-1-2. The main nozzle 2-1-1 is coaxially arranged with the ejection tube 2-2, and the sub-nozzle 2-1-2 is arranged at a circumference around the main nozzle 2-1-1 as the center, and the sub-nozzle 2-1-2 is arranged parallel to or obliquely with the main nozzle 2-1-1.

The main air flow channel 1-1 is connected to the main nozzle 2-1-1, and the secondary air flow channel 1-2 is connected to the secondary nozzle 2-1-2.

The main nozzle 2-1-1 includes a main nozzle air intake section 2-1-1-1, a main nozzle contraction section 2-1-1-2 and a main nozzle ejection section 2-1-1-3 which are sequentially arranged along the airflow direction;

The auxiliary nozzle 2-1-2 includes an auxiliary nozzle contraction section 2-1-2-2, an auxiliary nozzle injection section 2-1-2-3, an auxiliary nozzle primary air replenishment section 2-1-2-4, and an auxiliary nozzle air outlet section 2-1-2-5 which are arranged in sequence along the airflow direction. A plurality of nozzle primary air replenishment holes 2-1-1-4-1 are provided in the auxiliary nozzle primary air replenishment section 2-1-2-4 and along the normal direction of the auxiliary nozzle 2-1-2. The nozzle primary air replenishment holes are communicated with the auxiliary nozzle primary air replenishment section 2-1-2-4.

In the above structure, the main nozzle 2-1-1 is the main key mechanism that bears the heat load. The outer diameter of the main nozzle injection section 2-1-1-3 is larger than the outer diameter of the auxiliary nozzle injection section 2-1-2-3, and the ratio of the outer diameter of the main nozzle injection section 2-1-1-3 to the outer diameter of the auxiliary nozzle injection section 2-1-2-3 is ≥1.15:1. The main nozzle 2-1-1 and the injection tube 2-2 of this embodiment are coaxially designed, which gives priority to the main nozzle. The nozzle 2-1-1 has the injection and mixing capabilities; the auxiliary nozzle 2-1-2 is used as the auxiliary mechanism of the main body to bear the heat load. The auxiliary nozzle 2-1-2 is set at a circumferential position with the main nozzle 2-1-1 as the center and a certain distance as the radius, and the auxiliary nozzle 2-1-2 and the main nozzle 2-1-1 can be designed to be parallel or tilted, and the tilt angle between them can be designed to be an acute angle; through the multi-engine injection technology of the main nozzle 2-1-1 and the auxiliary nozzle 2-1-2, it is guaranteed that the main body heat load meets the high power demand.

In the first embodiment, the auxiliary nozzle 2-1-2 is increased with the structure of the auxiliary nozzle primary air replenishment section 2-1-2-4 compared with the main nozzle 2-1-1, wherein the cross-section of the auxiliary nozzle primary air replenishment section 2-1-2-4 is a polygonal structure, the nozzle primary air replenishment hole is a circular hole structure, the nozzle primary air replenishment hole is arranged at the polygonal end face of the auxiliary nozzle primary air replenishment section 2-1-2-4, the orientation of the nozzle primary air replenishment hole is set normal or inclined to the airflow direction, the number of the nozzle primary air replenishment holes is n*(1-N), wherein n is the number of columns along the airflow direction, and N is the number of polygons of the auxiliary nozzle primary air replenishment section 2-1-2-4. The circular hole diameter of the nozzle primary air replenishment hole of this embodiment is set to φ1mm to φ6mm. The above structure can solve the technical problem of weakened injection capacity due to the non-coaxiality of the auxiliary nozzle 2-1-2 and the injection tube 2-2, and avoids the main nozzle 2-1-1 injecting primary air at the end face of the contraction tube 2-2-1.

The diameter of the circle formed by the auxiliary nozzle air outlet section 2-1-2-5 of this embodiment around the main nozzle 2-1-1 is smaller than the diameter of the end face of the contraction tube 2-2-1, thereby ensuring that the airflow ejected from the auxiliary nozzle 2-1-2 can all be injected into the injection tube 2-2 through the contraction tube 2-2-1.

The contraction angle of the contraction tube 2-2-1 is set to 26.8° to 32.2°, and the ratio of the inlet diameter to the outlet diameter of the mixing tube 2-2-2 is in the range of 2.08:1 to 2.18:1. The above structural dimension design can further reduce the resistance loss when air enters. The ratio of the length to the diameter of the mixing tube 2-2-2 is in the range of 1.5:1 to 2.5:1, which can promote the mixing of multiple intersecting jets. The diffusion angle of the diffuser 2-2-3 is in the range of 6.2° to 7.8°, which can further promote the mixing of multiple intersecting jets and realize the conversion of static pressure, thereby ensuring the continuous stability of the combustion process. Combined with the structural dimension design of the above-mentioned ejector tube 2-2, with the support of multiple jets of the main nozzle 2-1-1 and the auxiliary nozzle 2-1-2, the gas ejection capacity is further enhanced, the mixing is more uniform, the mixture ejection speed is increased, and the combustion stability of the burner is further enhanced, thereby achieving complete combustion.

The working principle of this embodiment is:

The fuel gas enters the main nozzle 2-1-1 through the main air flow channel 1-1 of the casting body 1, passes through the main nozzle air intake section 2-1-1-1, the main nozzle contraction section 2-1-1-2 and the main nozzle introduction section 2-1-1-3 in sequence, and enters the introduction tube 2-2 after the air is introduced at the end of the contraction tube 2-2-1; synchronously, the fuel gas enters the secondary nozzle 2-1-2 through the secondary air flow channel 1-2 of the casting body 1, passes through the secondary nozzle contraction section 2-1-2-2, the secondary nozzle introduction section 2-1- 2-3, the auxiliary nozzle primary air replenishment section 2-1-2-4 and the auxiliary nozzle air outlet section 2-1-2-5, and the air is injected again at the end of the contraction tube 2-2-1 and then enters the injection tube 2-2; because the auxiliary nozzle 2-1-2 and the injection tube 2-2 are not coaxially arranged, the jet is guided along the contraction tube 2-2-1 into the injection tube 2-2, and intersects with the main nozzle 2-1-1 jet, so that after the multiple jets collide and mix with each other, a synthetic converging flow is formed, which greatly improves the mixing process. Compared with before, multiple gas jets are used to synchronously inject air into the injection tube 2-2 at the same time, and the working principle of strengthening turbulence and applying rotating airflow to strengthen combustion is utilized to mix gas and air more quickly, and the ejection speed of gas when passing through the burner fire hole is increased, and coupled with the unique porous combustion plate of the infrared stove, the combustion stability of the burner is further enhanced, which can not only meet the user's demand for stir-frying and heavy-load cooking, but also has a significant practical effect.

The process of gas injection and mixing in this embodiment fully combines the principle of low-pressure natural induced draft injection technology and the combination of intersecting airflows: first, the injection technology, the gas flows out from the main nozzle 2-1-1 and the auxiliary nozzle 2-1-2 at a certain pressure and a certain flow rate, and enters the same air intake contraction tube 2-2-1, and the gas inhales primary air by its own energy. The primary air of the present invention comes from the nozzle primary air replenishment hole of the auxiliary nozzle 2-1-2 and the end face of the air intake contraction tube 2-2-1 in the injection system of the infrared burner. Secondly, the mixing technology, because the main nozzle 2-1-1 and the auxiliary nozzle 2-1-2 are designed with different apertures, and the two are kept at a certain distance, the two gas jets in the injector 2 do not overlap each other, and do not affect their respective injections. After the jets enter the mixing section, they collide and mix with each other to form a synthetic converging flow, which strengthens the mixing process. The mixed gas flows out through the head fire hole to achieve the purpose of achieving complete combustion.

The infrared burner induced emission system adopted in the first embodiment is combined with the infrared burner, and the test is carried out in accordance with the test conditions specified in the national standard GB16410-2020 "Household Gas Cookers"; wherein the rated heat load is set to three heat load sections of 4.0kW-4.5kW-5.0kW respectively.

As shown in the following table, the actual converted heat load and deviation, the actual heat load and the CO concentration in the dry flue gas (α=1, volume fraction) measured by the flue gas analyzer.

According to the above table, the measured deviation between the actual converted heat load and the rated heat load of each burner meets the requirement within ±10%; the measured CO concentration (α=1, volume fraction) in the dry flue gas of each burner is lower than the national standard requirement of ≤0.05%.

Second embodiment:

Referring to FIG. 7 , in this embodiment, the difference from the first embodiment is that the cross section of the diffuser tube 2 - 2 - 3 along the airflow direction is a mixed structure of a trapezoid and a rectangle;

Third embodiment:

Referring to FIG8 , in this embodiment, the difference from the first embodiment is that the main nozzle 2-1-1 includes a main nozzle contraction section 2-1-1-2, a main nozzle introduction section 2-1-1-3, a main nozzle primary air replenishment section 2-1-1-4, and a main nozzle air outlet section 2-1-1-5 which are sequentially arranged along the air flow direction; wherein the main nozzle primary air replenishment section 2-1-1-4 is provided with a nozzle primary air replenishment hole which runs through the inside and outside;

Fourth embodiment:

Referring to Fig. 9, in this embodiment, the difference from the first embodiment is that the auxiliary nozzle 2-1-2 includes an auxiliary nozzle air intake section 2-1-2-1, an auxiliary nozzle contraction section 2-1-2-2 and an auxiliary nozzle ejection section 2-1-2-3 which are sequentially arranged in the airflow direction.

In summary, the infrared burner injection system of the present invention has a reasonable structural design, adopts a multi-jet injection technology formed by combining the main nozzle 2-1-1 and the auxiliary nozzle 2-1-2, and combines the structural design of the infrared-specific injection tube 2-2 and the porous combustion plate. The structure of the non-coaxial arrangement of the auxiliary nozzle 2-1-2 and the injection tube 2-2 can enhance turbulence and strengthen combustion with rotating airflow, improve the ability of primary air injection, and make the gas and air mix more evenly than before, and the ejection speed of the gas through the burner fire hole is increased, and the infrared stove has a porous combustion plate, and the combustion stability of the burner is further enhanced. It can not only meet the user's demand for stir-frying and heavy-load cooking, but also has a very significant practical effect.

The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims (10)

1. An infrared burner injection system, comprising: the casting device comprises a casting body and an ejector, wherein the casting body and the ejector are sequentially arranged along the air flow direction, the ejector comprises a multichannel nozzle and an ejector pipe, and the ejector pipe comprises a shrinkage pipe, a mixing pipe and a diffusion pipe, which are sequentially arranged along the air flow direction;

the casting body is arranged at the front end along the airflow direction and comprises a main airflow channel and a secondary airflow channel;

The multi-channel nozzle comprises a main nozzle and a secondary nozzle, the main nozzle and the injection pipe are coaxially arranged, the secondary nozzle is arranged at a circumference around the main nozzle as a circle center, and the secondary nozzle and the main nozzle are parallel or obliquely arranged;

The main air flow channel is connected with the main nozzle, and the auxiliary air flow channel is connected with the auxiliary nozzle.

2. The infrared burner injection system of claim 1 wherein the main nozzle comprises a main nozzle inlet section, a main nozzle convergent section, and a main nozzle injection section disposed in sequence along the direction of air flow.

3. The infrared burner injection system of claim 1 wherein said primary nozzle comprises a primary nozzle convergent section, a primary nozzle injection section, a primary nozzle primary air supplement section and a primary nozzle exit section disposed in sequence along an air flow direction, a plurality of nozzle primary air supplement holes disposed in said primary nozzle primary air supplement section and disposed in a direction normal to said primary nozzle, said nozzle primary air supplement holes being disposed in communication with said primary nozzle primary air supplement section.

4. The infrared burner injection system of claim 1 wherein the secondary nozzle comprises a secondary nozzle inlet section, a secondary nozzle convergent section and a secondary nozzle injection section disposed in sequence in the direction of air flow.

5. An infrared burner injection system according to claim 3 wherein said secondary nozzle comprises a secondary nozzle convergent section, a secondary nozzle injection section, a secondary nozzle primary air supplement section, a secondary nozzle exit section disposed in sequence in the direction of air flow, a plurality of nozzle primary air supplement holes disposed in said secondary nozzle primary air supplement section and in the direction normal to said secondary nozzle, said nozzle primary air supplement holes being disposed in communication with said secondary nozzle primary air supplement section.

6. The infrared burner injection system of claim 5 wherein said primary nozzle primary air supplemental segment is of the same configuration as said secondary nozzle primary air supplemental segment, said primary nozzle primary air supplemental segment has a polygonal cross section, said nozzle primary air supplemental aperture has a circular aperture configuration, said nozzle primary air supplemental aperture is disposed at the polygonal end face of said primary nozzle primary air supplemental segment or secondary nozzle primary air supplemental segment, said nozzle primary air supplemental aperture is oriented normal to the direction of air flow or is disposed obliquely thereto.

7. The infrared burner injection system of claim 6 wherein the number of nozzle primary air make-up holes is N (1-N), where N is the number of columns in the air flow direction and N is the number of polygons of the primary or secondary nozzle primary air make-up sections.

8. The infrared burner injection system of claim 5 wherein the outer diameter of the secondary nozzle outlet section is less than the outer diameter of the primary nozzle outlet section and the outer diameter of the secondary nozzle injection section is less than the outer diameter of the primary nozzle injection section.

9. The infrared burner injection system of claim 5 wherein the diameter of the circumference of said secondary nozzle outlet segment around the center of said primary nozzle is less than the diameter of said shrink tube end face.

10. The infrared burner injection system of claim 1 wherein the shrinkage angle of the shrinkage tube is set at 26.8 ° to 32.2 °;

The ratio of the inlet diameter to the outlet diameter of the mixing tube ranges from 2.08:1 to 2.18:1, a step of;

The ratio of the length to the diameter of the mixing tube is 1.5:1-2.5:1;

The diffuser pipe has a diffuser angle in the range of 6.2 ° to 7.8 °.