CN110671702A - Gas stove nozzle and gas stove - Google Patents
Gas stove nozzle and gas stove Download PDFInfo
- Publication number
- CN110671702A CN110671702A CN201910997803.1A CN201910997803A CN110671702A CN 110671702 A CN110671702 A CN 110671702A CN 201910997803 A CN201910997803 A CN 201910997803A CN 110671702 A CN110671702 A CN 110671702A
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- China
- Prior art keywords
- gas
- cavity
- gas stove
- nozzle
- chamber
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- 230000004323 axial length Effects 0.000 claims abstract description 17
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 11
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 69
- 239000003570 air Substances 0.000 description 35
- 238000004088 simulation Methods 0.000 description 11
- 239000012530 fluid Substances 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/08—Arrangement or mounting of burners
- F24C3/085—Arrangement or mounting of burners on ranges
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
The invention provides a gas stove nozzle and a gas stove, the gas stove nozzle comprises a body, an air inlet cavity and an air outlet cavity are sequentially formed on the body along the axis direction, a central flow passage is arranged at the communication position of the air inlet cavity and the air outlet cavity, the axial sectional area of the central flow passage is smaller than the axial sectional areas of the air inlet cavity and the air outlet cavity, the axial length of the central flow passage is A, and the value range of A is [1.7, 2.1] mm. The gas stove nozzle has a good gas injection effect so as to improve the combustion heat efficiency of the gas stove.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a gas stove nozzle and a gas stove.
Background
An injection atmospheric burner in the prior art is an important part of a gas stove and mainly comprises a nozzle, an injector and a burner head. External gas enters the ejector through the nozzle, the gas and air are mixed in the ejector, and the mixed gas is introduced into the head of the burner to realize heat release during combustion. Above-mentioned in-process, to the drawing of ambient air can directly influence the efficiency of burning in order to realize the mixture of gas and air, and what general gas and air mix is more abundant, and the gas burning after the mixture is more abundant, and the heat of release is more.
Along with the problem of energy shortage, the energy consumption of household gas appliances is reduced, the emission is reduced, and the contribution to the low-carbon environmental protection business of China is undoubtedly made, so from the angle of improving the ejection effect in the prior art, a multi-stage ejection structure is designed in the gas stove, if the gas is ejected at the nozzle, and then the gas is ejected at the second stage when passing through the ejector, and in the aspect of the sequence of the gas flowing through the device, theoretically, the ejection at the nozzle can directly influence the subsequent ejection effect.
Disclosure of Invention
Therefore, the invention aims to improve the injection effect of the nozzle of the existing gas stove on air, and provides the gas stove nozzle and the gas stove.
In order to solve the problems, the invention provides a gas stove nozzle which comprises a body, wherein a gas inlet cavity and a gas outlet cavity are sequentially formed in the body along the axis direction, a central flow passage is arranged at the communication position of the gas inlet cavity and the gas outlet cavity, the axial sectional area of the central flow passage is smaller than the axial sectional areas of the gas inlet cavity and the gas outlet cavity, the axial length of the central flow passage is A, and the value range of A is [1.7, 2.1] mm.
Further, the axial length A of the center flow passage is 1.9 mm.
Furthermore, the air outlet cavity is also provided with a diffusion section, and the diffusion section is coaxially formed behind the central flow channel along the air inlet direction.
Further, the gas outlet cavity is also provided with a mixing cavity which is formed at the tail end of the diffuser section.
Furthermore, a plurality of injection runners are formed on the peripheral wall of the mixing cavity close to the pressure expansion cavity, and outside air enters the mixing cavity through the injection runners to be mixed with fuel gas.
Furthermore, the injection flow passages are distributed at equal intervals along the circumference.
Furthermore, the outer peripheral surfaces of the end parts of the air inlet cavity and the air outlet cavity are also provided with connecting parts.
Further, the connecting part is an external thread.
The invention also provides a gas stove comprising any one of the gas stove nozzles; and the tail end of the gas outlet cavity is connected with the combustor through a pipeline.
The technical scheme of the invention has the following advantages:
1. the gas stove nozzle comprises a body, wherein an air inlet cavity and an air outlet cavity are sequentially formed in the body along the axis direction, a central flow passage is arranged at the communication position of the air inlet cavity and the air outlet cavity, the axial sectional area of the central flow passage is smaller than the axial sectional areas of the air inlet cavity and the air outlet cavity, the axial length of the central flow passage is A, and the value range of the A is [1.7, 2.1] mm.
As set forth in the background, the primary object of the present invention is to increase the ejector effect on air at the nozzle. In the existing technical standard, the injection effect of the nozzle is evaluated mainly from the following two aspects:
the first is that: the velocity, namely the velocity of the mixed gas after the air is injected by the fuel gas, the higher the velocity of the mixture is, the larger the kinetic energy of the mixture is, and the mixture can be more fully mixed in a rear injector;
secondly, the following steps: the smaller the jet expansion angle is, the larger the effective kinetic energy is.
In this embodiment, the structure of the center flow channel is changed to ensure the maximum effective kinetic energy as much as possible.
The specific idea is as follows, and the relationship between the center flow channel, the jet flow expansion angle and the effective kinetic energy is explained. As described above, generally, when the ejection effect of the nozzle is evaluated, it is desirable that the length of the central flow channel is larger, so that the expansion angle of the ejected fluid is smaller, but when the length of the central flow channel reaches a certain length, the kinetic energy of the mixed gas is also obviously consumed by the wall resistance of the flow channel to the fluid in the flow channel, and the velocity of the jet flow is reduced, so that a reasonable length of the central flow channel is required to satisfy the balance between the expansion angle and the effective kinetic energy, and the optimal ejection effect is achieved.
Based on the analysis theory, the gas inlet cavity is communicated with an external gas pipeline, gas enters the central flow passage through the gas inlet cavity, and a simulation experiment and a simulation process are given in the following specific implementation mode.
2. The axial length A of the central flow passage is 1.9 mm. As described above, it is found through simulation that when the axial length a of the center flow channel is 1.9mm, the change rate of the divergence angle is slowed, and the weighting speed is not changed significantly, at this time, it can be satisfied that the divergence angle is as small as possible, and at the same time, it is ensured that the kinetic energy of the fluid flowing out of the medium flow channel is large.
The peripheral wall of the mixing cavity in the gas stove nozzle is provided with a plurality of injection flow channels, the peripheral wall of the mixing cavity is close to the pressure expansion cavity, outside air enters the mixing cavity through the injection flow channels, the outside air mixed with gas enters the mixing cavity through the injection flow channels and is mixed with the gas, the gas entering an air inlet is in a high-pressure state relative to the outside gas, enters the pressure expansion section at a certain speed, and then enters the mixing cavity by entrainment under the turbulent action of jet flow, so that the preliminary mixing of the gas and the air is realized, and necessary conditions are provided for combustion.
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 description of the embodiments or 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 other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a sectional view of a nozzle of a gas range in embodiment 1 provided by the present invention;
FIG. 2 is a schematic view of a gas range nozzle according to embodiment 1 of the present invention
Fig. 3 is a graph showing the expansion angle and the change in the weighting rate in example 1 according to the present invention.
Description of reference numerals:
1-an air inlet cavity;
2-an air outlet cavity; 21-a diffusion section; 22-a mixing chamber;
3-a central flow channel;
4-injection flow channel;
5-a connecting part;
a-axial length of the center flow channel.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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 should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
As shown in fig. 1 to 2, the gas stove nozzle in this embodiment includes a body, an air inlet cavity 1 and an air outlet cavity 2 are sequentially formed on the body along an axial direction, a central flow channel 3 is disposed at a communication position between the air inlet cavity 1 and the air outlet cavity 2, an axial sectional area of the central flow channel 3 is smaller than axial sectional areas of the air inlet cavity 1 and the air outlet cavity 2, an axial length of the central flow channel 3 is a, and a value range of a is [1.7, 2.1] mm.
The axial length a of the center flow path 3 of the gas range nozzle shown in this embodiment is 1.9 mm.
Further, the axial flow passage cross-sectional shape of the center flow passage 3 in the present embodiment is a circle having a diameter of 2 mm.
Of course, in some other embodiments, the cross-sectional shape of the axial flow channel may be a triangle or other polygonal structure.
The gas stove nozzle in the embodiment further comprises the following structure, the gas outlet cavity 2 is further provided with a diffusion section 21, and the diffusion section 21 is coaxially formed behind the central flow channel 3 along the gas inlet direction. The pressure of the gas entering the gas inlet cavity 1 is low, the burner is generally positioned above the gas stove, the mixed gas is ejected from the burner by overcoming the atmospheric pressure and the resistance of the pipe wall, and the diffuser section 21 is used for expanding the pipe diameter, so that the fluid speed is reduced, the fluid pressure is increased, and the ejection effect of the gas stove nozzle is enhanced.
The outlet chamber 2 in this embodiment also has a mixing chamber 22, and the mixing chamber 22 is formed at the end of the diffuser section 21. A plurality of injection flow passages 4, eight in this embodiment, are formed on the circumferential wall at the front end of the mixing chamber 22 and are equidistantly distributed along the circumference. The outside air enters the mixing cavity 22 through the injection flow passage 4 and is mixed with the fuel gas. External air enters the mixing cavity 22 through the injection flow channel 4 to be mixed with the gas, the gas entering the gas inlet cavity 1 is in a high-pressure state relative to the external gas, enters the diffusion section 21 at a certain speed, and can entrain nearby gas to enter the mixing cavity 22 under the turbulent action of jet flow, so that the primary mixing of the gas and the air is realized, and necessary conditions are provided for combustion.
It should be noted that the injection effect is improved by improving the divergence angle and the effective kinetic energy of the gas coming out from the end of the central flow passage 3, and the effective kinetic energy is embodied as the flow velocity.
As shown in fig. 2, the body of the present embodiment further has a connecting portion 5 formed on the outer peripheral surface of the end portions of the inlet chamber 1 and the outlet chamber 2, one end of which is connected to a supply line of the gas and the other end of which is connected to a line of the burner.
A specific simulation experiment method is provided below to illustrate that the axial length a of the center flow channel in this embodiment has a value range of [1.7, 2.1] mm, and it is proved that 1.9mm is the optimal implementation angle. The specific process comprises the following steps:
the first step is as follows: establishing a 3D model of the gas stove nozzle in the embodiment, and importing the model into ANSYS simulation software;
the second step is that: entering a fluid simulation module in ANSYS, and carrying out simulation processing on the 3D model of the gas stove nozzle;
the third step: setting the following parameters of an air inlet angle B, the axial length A of a central flow channel and an expansion section diffusion angle C in a fluid simulation module, and establishing a simulation process of flowing in from B, passing through the axial length A of the central flow channel and flowing out from C, wherein the air inlet pressure value of the experiment is given to 2000Pa, the air outlet pressure value is given to 0Pa, the axial length A of the central flow channel is a variable and is respectively set to be 0.9mm, 1.9mm and 2.9mm, so as to carry out simulation treatment;
the fourth step: based on the above simulation process, a graph of the weighted flow rate of the fluid at the outlet end of the center flow channel 3 versus the fluid velocity and divergence angle is established.
And (4) simulation conclusion:
the following table is a gas weighted velocity table at different angles:
as shown in fig. 3, the abscissa is the axial length a of the center flow channel 3, the ordinate is a graph of the weighted velocity versus the jet expansion angle,
wherein a is a change curve of the weighted speed; b is a change curve of the jet flow expansion angle; d represents the corresponding jet angle when A is 1.9 mm.
Through analyzing two groups of data, it can be obviously seen that when the axial length A of the central flow passage is 1.9mm, the change rate of the divergence angle has an inflection point, the speed is slowed, and the change rate of the divergence angle is basically kept unchanged, after the axial length A of the central flow passage is larger than 1.9mm, the change amplitude of the divergence angle is obviously reduced, and the change rate of the weighting speed is not obviously changed, so that the effect between the corresponding divergence angle and the weighting speed at 1.9mm is the best, the divergence angle can be kept in a smaller state, and the consumption of kinetic energy is less.
Example 2
The embodiment provides a gas stove, which comprises the gas stove nozzle in embodiment 1 and a burner, wherein the tail end of the mixing cavity 22 is connected with the burner through a pipeline, so that all technical advantages of the gas stove nozzle are achieved, and further description is omitted.
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 therefrom are within the scope of the invention.
Claims (9)
1. The utility model provides a gas-cooker nozzle, its characterized in that, includes the body, the body is formed with air intake chamber (1) and goes out air cavity (2) along the axis direction in proper order, air intake chamber (1) with go out air cavity (2) intercommunication department and be provided with center runner (3), the axial sectional area of center runner (3) is less than air intake chamber (1) with go out the axial sectional area of air cavity (2), just the axial length of center runner (3) is A, and the value range of A is [1.7, 2.1] mm.
2. The gas burner nozzle of claim 1, wherein the central flow passage has an axial length a of 1.9 mm.
3. A gas burner nozzle according to claim 2, characterized in that the outlet chamber (2) further has a diffuser section (21), the diffuser section (21) being formed coaxially behind the center flow channel (3) in the inlet direction.
4. A gas range nozzle according to claim 3, characterized in that the gas outlet chamber (2) further has a mixing chamber (22), the mixing chamber (22) being formed at the end of the diffuser section (21).
5. The gas stove nozzle according to claim 4, wherein a plurality of injection flow passages (4) are formed on the peripheral wall of the mixing cavity (22) close to the pressure expansion cavity (21), and outside air enters the mixing cavity (22) through the injection flow passages (4) to be mixed with gas.
6. The gas burner nozzle according to claim 5, characterized in that the injector channels (4) are equally circumferentially distributed.
7. Gas stove nozzle according to any of the claims 1-6, characterized in that the inlet chamber (1) and the outlet chamber (2) are also formed with a connection part (5) on the outer circumference of their ends.
8. Gas stove nozzle according to claim 7, characterized in that the connection part (5) is an external thread.
9. A gas range, comprising:
the gas range nozzle of any one of claims 1 to 8;
and the tail end of the gas outlet cavity (2) is connected with the combustor through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910997803.1A CN110671702B (en) | 2019-10-18 | 2019-10-18 | Gas stove nozzle and gas stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910997803.1A CN110671702B (en) | 2019-10-18 | 2019-10-18 | Gas stove nozzle and gas stove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110671702A true CN110671702A (en) | 2020-01-10 |
| CN110671702B CN110671702B (en) | 2024-07-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910997803.1A Active CN110671702B (en) | 2019-10-18 | 2019-10-18 | Gas stove nozzle and gas stove |
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| Country | Link |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635880A (en) * | 2011-02-11 | 2012-08-15 | 柴文龙 | Gas stove capable of controlling multiple gas nozzles in grouping manner |
| CN203454142U (en) * | 2013-07-03 | 2014-02-26 | 美的集团股份有限公司 | Gas nozzle for gas stove and gas stove therewith |
| CN104421941A (en) * | 2013-08-30 | 2015-03-18 | 广东美的厨房电器制造有限公司 | Fuel gas nozzle for gas stove and gas stove with fuel gas nozzle |
| US20150159612A1 (en) * | 2013-12-11 | 2015-06-11 | Denso Corporation | Fuel injector |
| CN108518711A (en) * | 2018-05-07 | 2018-09-11 | 广东美的厨房电器制造有限公司 | Air inlet tube assembly and gas-cooker |
| CN110304716A (en) * | 2019-08-05 | 2019-10-08 | 维尔利环保科技集团股份有限公司 | Jet-flow aeration arm and its integrated form jet aerator |
| CN210831992U (en) * | 2019-10-18 | 2020-06-23 | 珠海格力电器股份有限公司 | Gas stove nozzle and gas stove |
-
2019
- 2019-10-18 CN CN201910997803.1A patent/CN110671702B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635880A (en) * | 2011-02-11 | 2012-08-15 | 柴文龙 | Gas stove capable of controlling multiple gas nozzles in grouping manner |
| CN203454142U (en) * | 2013-07-03 | 2014-02-26 | 美的集团股份有限公司 | Gas nozzle for gas stove and gas stove therewith |
| CN104421941A (en) * | 2013-08-30 | 2015-03-18 | 广东美的厨房电器制造有限公司 | Fuel gas nozzle for gas stove and gas stove with fuel gas nozzle |
| US20150159612A1 (en) * | 2013-12-11 | 2015-06-11 | Denso Corporation | Fuel injector |
| CN108518711A (en) * | 2018-05-07 | 2018-09-11 | 广东美的厨房电器制造有限公司 | Air inlet tube assembly and gas-cooker |
| CN110304716A (en) * | 2019-08-05 | 2019-10-08 | 维尔利环保科技集团股份有限公司 | Jet-flow aeration arm and its integrated form jet aerator |
| CN210831992U (en) * | 2019-10-18 | 2020-06-23 | 珠海格力电器股份有限公司 | Gas stove nozzle and gas stove |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110671702B (en) | 2024-07-23 |
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