CN212565783U

CN212565783U - Burner is with drawing penetrating structure, cooking utensil

Info

Publication number: CN212565783U
Application number: CN202020681431.XU
Authority: CN
Inventors: 刘梦茹; 叶伟林; 温汉杰; 段聪聪; 周文通
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2021-02-19
Anticipated expiration: 2030-04-28

Abstract

The utility model relates to the technical field of household appliances, concretely relates to combustor is with drawing penetrating structure, cooking utensil. The utility model provides a combustor is used for injection structure to combustion power scope at the combustor that is more than or equal to 4KW less than or equal to 5.23KW for combustor, and it includes shrink section and diffusion section, and the axial length sum of shrink section and diffusion section is L, and L's value range is more than or equal to 120mm less than or equal to 130 mm. The utility model provides a combustor draws the structure with drawing and can effectively reduce the content of NOx in the flue gas that the combustor produced.

Description

Burner is with drawing penetrating structure, cooking utensil

Technical Field

The utility model relates to the technical field of household appliances, concretely relates to combustor is with drawing penetrating structure, cooking utensil.

Background

In the prior art, the household gas stove injects air through the ejector to realize the mixing of gas and air. The primary air coefficient of the ejector for ejecting air is about 0.6, but because a power device such as a fan and the like is not arranged on the household gas stove, the pressure in the ejector is very low and is generally 5-30 Pa. At such low pressures, the mixing uniformity of the gas and air mixture in the burner is very poor, which results in too high a CO content in the flue gas and negatively affects the thermal efficiency.

In order to solve the problems, the front end of the ejector in the prior art is provided with an air door structure, the ejection amount of the ejector to air is increased through the air door, the content of NOx in combustion products is increased, particularly NO in smoke can be combined with hemoglobin after entering a human body, the affinity of NO is 1400 times that of CO, and serious threat is caused to the health of the human body.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model discloses aim at reducing NOx's content in the flue gas that domestic combustor produced among the prior art to provide a combustor with drawing and penetrating structure, cooking utensil.

In order to solve the technical problem, the utility model provides a combustor is with drawing and penetrates structure for the combustion power scope is at the combustor of more than or equal to 4KW less than or equal to 5.23KW, and it includes shrink section and diffusion section, the shrink section with the axial length sum of diffusion section is L, and L's value scope is more than or equal to 120mm less than or equal to 130 mm.

Further, the sum L of the axial lengths of the contraction section and the diffusion section is 120 mm.

Further, the air inlet section is connected to one end of the contraction section.

The utility model discloses in still provide a cooking utensil, include: the injection structure for the burner is any one of the above; further comprising: the nozzle is connected to the air inlet section, and the distributor is connected to the diffuser section.

Furthermore, an air door structure is arranged between the air inlet section and the nozzle.

Furthermore, the two burners are respectively connected to the inner ring and the outer ring of the distributor by using an injection structure.

Further, the cooking appliance is a gas stove.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a combustor is with drawing and penetrates structure for the combustion power scope is at the combustor of more than or equal to 4KW less than or equal to 5.23KW, and it includes shrink section and diffusion section, and the axial length sum of shrink section and diffusion section is L, and L's value scope is more than or equal to 120mm less than or equal to 130 mm.

It should be noted that, the performance of the burner is determined by a plurality of factors, and the utility model discloses when solving the problem that reduces the NOx content that produces in the burner combustion process, still need to control and optimize these three important parameters of "heat load", "thermal efficiency", "CO in the flue gas" of burner.

The ejection ability of penetrating the structure is penetrated through the reinforcing in the experimentation to the discovery, all can play certain positive improvement effect to four parameters in the aforesaid, so the utility model discloses penetrate the ejection ability of penetrating the structure to how the reinforcing and made further improvement, concrete principle as follows:

compared with the burner injection structure in the prior art, the burner injection structure of the utility model substantially increases the sum of the axial lengths of the contraction section and the diffusion section in the burner injection structure in the prior art, the length range of the injection structure ensures that the gas stays in the diffusion cavity for enough time to realize the efficient premixing of the gas and the air, furthermore, the mixture of gas and air with higher uniformity has higher burning speed, shorter flame and more concentrated high-temperature area, the more obvious the negative pressure formed to the injection structure is, the pressure of the mixed gas in the diffuser pipe is enhanced, the mixing uniformity of the mixed gas is further improved, under such virtuous cycle, through suitably reducing the air quantity of drawing, and guarantee that CO content does not exceed standard in the flue gas, can reduce NOx content simultaneously, can also promote efficiency and heat load.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of an injection structure for a burner provided in embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a cooking appliance provided in embodiment 2 of the present invention;

fig. 3 is an exploded view of a cooking appliance provided in embodiment 2 of the present invention.

Description of reference numerals:

1-a contraction section;

2-a diffusion section;

3-an air inlet section;

4-a nozzle;

5-fire distributor;

6-air door structure.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

As shown in fig. 1, the injection structure for a burner provided in this embodiment sequentially includes an air inlet section 3, a contraction section 1, and a diffusion section 2.

The suitable object of the injection structure for the combustor in the embodiment is a combustor with the combustion power range of more than or equal to 4KW and less than or equal to 5.23KW, and the sum of the axial lengths of the contraction section 1 and the diffusion section 2 in the injection structure corresponding to the combustor under the power is generally 110 mm.

In the embodiment, the sum of the axial lengths of the contraction section 1 and the diffusion section 2 is defined as L, and the value range of L is more than or equal to 120mm and less than or equal to 130mm, so that the content of NOx generated in the combustion process of the combustor is reduced. The principle is explained below:

it should be noted that the performance of the burner is determined by a plurality of factors, and as shown in table 1 below, three important parameters of "heat load", "heat efficiency", "CO in flue gas" of the burner need to be controlled and optimized while solving the problem of reducing the NOx content generated during the combustion process of the burner.

TABLE 1

Through the table, the ejection capability of the ejection structure is enhanced, and a certain positive improvement effect can be achieved on the four parameters, so that the ejection capability of the ejection structure is further improved, and the specific principle is as follows:

compared with the burner injection structure in the prior art, the burner injection structure in the embodiment substantially increases the sum of the axial lengths of the contraction section and the diffusion section in the burner injection structure in the prior art, the length range of the injection structure ensures that the gas stays in the diffusion cavity for enough time to realize the efficient premixing of the gas and the air, furthermore, the mixture of gas and air with higher uniformity has higher burning speed, shorter flame and more concentrated high-temperature area, the more obvious the negative pressure formed to the injection structure is, the pressure of the mixed gas in the diffuser pipe is enhanced, the mixing uniformity of the mixed gas is further improved, under such virtuous cycle, through suitably reducing the air quantity of drawing, and guarantee that CO content does not exceed standard in the flue gas, can reduce NOx content simultaneously, can also promote efficiency and heat load.

Further, the axial length of the axial direction of the contraction section and the axial direction of the diffusion section in the injection structure of the burner in the embodiment are 120mm, and the axial length is tested to be obviously reduced in the content of NOx generated by the burner as shown in the following table 2.

TABLE 2

The 110mm ejector pipe in table 2 represents that the sum of the axial lengths of the contraction section and the diffusion section of the ejector structure in the prior art is 110 mm.

The 120mm ejector pipe represents that the sum of the axial lengths of the contraction section and the diffusion section of the ejector structure in the embodiment is 120 mm.

The data in table 2 clearly show that the injection structure with increased length can significantly reduce the NOx content in the combustion flue gas.

Example 2

As shown in fig. 2 and 3, the present embodiment provides a cooking appliance, specifically a gas range, which includes the injector structure a for a burner described in embodiment 1, and has all the technical advantages thereof.

The burner is with drawing the air inlet position of the section of admitting air 3 on the structure A and installing nozzle 4, and nozzle 4 is responsible for ejecting the gas with high speed to the burner with drawing the structure A, and the diffuser section 2's on the burner with drawing the structure A gas outlet is connected on distributor 5, will draw the gas that the structure mixes to carry the burner head, realizes the burning.

Adopt two combustors in this embodiment to penetrate structure A with drawing, two combustors are connected respectively on the inner circle and the outer lane of distributor 5 with drawing structure A's gas outlet to guarantee the sufficiency of combustor head air feed.

This embodiment has still installed air door structure 6 between nozzle 4 and air intake section 3 to increase the volume of drawing the air, guarantee that the gas can mix with the air of sufficient volume.

When the gas stove in the embodiment works, external gas is injected into the injection structure A for the burner through the nozzle 4 under the assistance of the air door structure 6, and is fully mixed in the contraction section 1 and the diffusion section 2 in the injection structure A for the burner to act on the distributor 5, so that the full combustion is realized.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The utility model provides a combustor is with drawing and penetrates structure for combustion power scope is at the combustor of more than or equal to 4KW less than or equal to 5.23KW, and it includes shrink section (1) and diffusion section (2), its characterized in that, shrink section (1) with the axial length sum of diffusion section (2) is L, and the value range of L is more than or equal to 120mm less than or equal to 130 mm.

2. The ejector structure for a burner according to claim 1, wherein the sum L of the axial lengths of the contraction section (1) and the diffusion section (2) is 120 mm.

3. The ejector structure for a burner according to claim 1 or 2, further comprising an air inlet section (3) connected to one end of the contraction section (1).

4. A cooking appliance, comprising:

the ejector structure for burners as claimed in any one of claims 1 to 3;

further comprising:

a nozzle (4) connected to the air inlet section (3) and a distributor (5) connected to the diffuser section (2).

5. Cooking appliance according to claim 4, characterized in that a damper arrangement (6) is also provided between the air inlet section (3) and the nozzle (4).

6. The cooking appliance according to claim 4 or 5, characterized in that two burners are connected with an injection structure to the inner and outer ring of the distributor (5), respectively.

7. The cooking appliance of claim 6, wherein the cooking appliance is a gas range.