WO2019223402A1

WO2019223402A1 - Upper air inlet cooker burner

Info

Publication number: WO2019223402A1
Application number: PCT/CN2019/077984
Authority: WO
Inventors: 卢华师
Original assignee: 宁波方太厨具有限公司
Priority date: 2018-05-23
Filing date: 2019-03-13
Publication date: 2019-11-28
Also published as: CA3101040C; CN110529850A; CA3101040A1; AU2019272131B2; AU2019272131A1; US20210207798A1

Abstract

Disclosed is a cooker burner, comprising a base (1), a first ejection channel (3), a primary air channel (4), a burner cap (5) and a transmission channel (6). The base (1) is provided with a cavity (11) having an upward opening and used for accommodating at least one first ejector (12). The first ejection channel (3) comprises a central chamber (311) located in the center, and a peripheral chamber (312) surrounding the central chamber (311). An inlet of the central chamber (311) is opposite the first ejector (12). The peripheral chamber (312) is used for making primary air around the periphery of the central chamber (311) uniform. An interlayer structure design of the first ejection channel (3) can better make gas in the central chamber (311) more directly mix with the primary air in the peripheral chamber (312), thereby improving the uniformity and intake rate of the primary air uniformly distributed at the periphery of the central chamber (311) and also avoiding a yellow flame and weak flame.

Description

Burner of up-wind cooker

Technical field

The invention relates to a burner for a gas cooker, in particular to an upward-inlet type cooker burner with a double channel.

Background technique

At present, up-wind gas stoves on the market such as platform-type gas stoves and embedded gas stoves, of which the burner of the embedded gas stove has a single-channel up-air structure, and the gas is entered through one channel. The gas firepower is controlled by a valve and cannot be separated. Use inner ring gas.

In order to solve the problem that there is no independent central fire in a single passage and the heat load is small, a Chinese patent CN1212348A (application number CN98120026.5) discloses a gas burner with a simple structure and capable of independently adjusting the central fire and the outer ring fire. That is, this burner is generally equipped with a central injector and an outer ring injector, but this gas burner was found to have insufficient combustion performance in experiments. The speed at which the air is supplied to the central flame head and the external flame head is different. Due to the uneven intake of the central injector and the outer ring injector, the incomplete mixing of the gas and the primary air will also cause the flame length of the central fire and the outer ring fire to be different. Limitation of the height of the device should not be made too long, resulting in large channel resistance, and yellow flames tend to appear when the power is high, especially at low fire gears, the yellow flames are more obvious.

A Chinese utility model patent CN2427756Y (patent number ZL00233192.6) provides a solution to solve the above problems, specifically: adding a secondary channel next to the original single main channel to make the secondary channel pass directly to the internal combustion circle, forming two circuits Gas can enter the gas mixing chamber at the same time, and the main passage can be closed when burning, and the auxiliary passage can be used alone. According to the needs of the stove with this structure, the inner and outer fire rings can be opened at the same time, and the outer fire ring can also be closed and used alone. The inner fire ring, and the fire power is controlled by the switch, can not only achieve the purpose of cooking dishes, but also save gas and reduce pollution, but it only adds a sub-channel next to the main channel, which corresponds to the outer fire ring gas injector. The channel corresponds to the inner ring fire gas injector, and the auxiliary channel is eccentrically disposed with respect to the main channel, so that the pressure of the gas flowing out of the fire holes arranged in the circumferential direction in the small fire cover corresponding to the auxiliary channel is uneven. The flame of the fire is uneven.

In order to avoid the problem of non-uniform flame, for example, a Chinese utility model patent CN204026673U (patent number ZL201420414274.0) mentions an upper inlet burner, which includes a body seat fixed on the bottom shell, wherein the bottom shell is fully closed and the bottom is not Opening, the body seat has three injectors, two outer ring injectors and one inner ring injector. The body seat is fixed to the panel. After the body and the body seat are installed, the center line of the injector corresponds to the outer ring of Venturi and the inner ring. Venturi centerline. Because the high-speed fluid ejected by the ejector is liable to generate negative pressure, the air is drawn into the venturi. This part of the air does not flow into the body, is directly obtained from the atmosphere and is sent to the vicinity of the ejector. The two outer ring ejectors It is located on both sides of the inner ring injector. The outer 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 gas emitted by the other outer ring injector is blocked. Part of it will be poured back into the gas passage corresponding to the blocked outer ring injector through the outer ring fire cover. If too much gas is accumulated, it will easily cause an explosion.

Summary of the Invention

A technical problem to be solved by the present invention is to provide a cooker burner that effectively improves the uniformity of the mixing of primary air and gas in view of the existing state of the art.

Another technical problem to be solved by the present invention is to provide a cooker burner that does not easily generate yellow flames and firepower in view of the above-mentioned current state of the art.

The technical solution adopted by the present invention to solve the above technical problems is that the cooker burner includes:

The base has a concave cavity with an opening facing upward, and a first ejector is disposed at a central position of the cavity;

The connecting body is disposed on the base and includes a plate body. The center of the plate body has a vertical first ejection channel, and the outer periphery of the plate body extends in a horizontal direction and can cover the body. Hold the cavity;

Primary air passages are arranged circumferentially and at intervals along the connecting body, and are used to communicate the cavity with the outside to introduce primary air from the outside into the cavity of the base;

A fire cover is disposed on the connecting body, and a first mixing chamber located in the center and a second mixing chamber located on the periphery are formed between the connecting cover and the connecting body, and the first mixing chamber corresponds to the first mixing chamber. A first ejection channel for mixing primary air and gas; and

A transmission channel for transmitting the mixed primary air and gas from the first mixing chamber to the second mixing chamber;

It is characterized by

The first ejection channel is a sandwich structure, and includes a central chamber located at the center and a peripheral chamber surrounding the central chamber; a lower end entrance of the central chamber is in communication with the base cavity and communicates with the base cavity. The first ejector is opposite, and the upper outlet of the central chamber is in communication with the first air-mixing chamber; the lower end of the outer chamber is in communication with the base cavity, and the outer chamber The upper end of the chamber is closed as a blind end.

The first ejection channel has a cylindrical structure that is open from top to bottom. The cylinder includes an inner peripheral wall and an outer peripheral wall spaced from the inside to the outside. The inner peripheral wall divides the cylinder into the central chamber. And the outer peripheral chamber, and the upper end edge of the inner peripheral wall is connected to the upper end edge of the outer peripheral wall to form a closed end surface. By means of the closed end surface, the gas in the central chamber can be more directly mixed with the air in the peripheral chamber to prevent the gas and the primary air from colliding with each other from different directions, thereby further improving the uniform distribution of the primary air. The uniformity of the outer periphery of the central cavity, while improving the primary air intake rate, can also effectively reduce the loss of kinetic energy.

Further, a lower end edge of a peripheral wall of the peripheral chamber is lower than a lower end edge of a peripheral wall of the central chamber. This design enables the air and gas to be premixed downstream of the central cavity first, and then with the help of the low pressure caused by the Venturi effect obtained in the first mixing chamber itself, the premixed air and gas are sucked into the first The second mixing is performed after one mixing chamber, which effectively improves the uniformity of the primary air and gas mixing.

In order to further improve the mixing uniformity of the primary air and the gas, the fire cover has a concave groove from the bottom to the top, and the groove for the first ejection channel to extend in, and the groove is surrounded by the plate body. The first air mixing chamber is formed, and a radial venturi cavity is enclosed between the lower surface of the top wall of the groove and the closed end surface of the first ejection channel. At the same time, the radial venturi chamber can also effectively reduce the height of the burner. Of course, it is also possible to use a gas mixing chamber that also has a Venturi effect cavity, such as an axial Venturi cavity.

The radial venturi cavity can be formed in the following manner. The closed end surface of the first ejection channel includes a first end surface disposed horizontally and a second end surface gradually inclined downward from the inside along the lower edge of the first end surface. The vertical distance D1 of the lower surface of the cavity top wall, the vertical distance D2 of the upper edge of the second end surface and the lower surface of the groove top wall, and the vertical distance D3 of the lower edge of the second end surface and the lower surface of the groove top wall are as follows: Relationship: D1 <D2 <D3, thus forming a radial venturi cavity.

Further, an included angle α between the first end surface and the second end surface is 5 ° to 15 °. If the angle is too large, the burner will be too high, and the volume of the burner will increase. It will be difficult to meet the requirements of built-in gas stoves. If the angle is too small, the airflow resistance will be large, and the effect on reducing the airflow resistance and reducing the volume of the cavity is not good. obvious.

One step further, the fire cover includes an inner ring portion and an outer ring portion that are concentrically spaced, the groove is provided inside the inner ring portion, and the top end of the inner ring portion is higher than the outer ring portion. At the top end, the inner ring portion includes an annular wall protruding upward and a main cover plate covering the annular wall, and the annular wall is formed with a radial main fire groove and a flame stabilization groove at intervals along the circumferential direction. And cooperate with the outer peripheral wall of the main cover plate to form a main fire hole and a flame stabilization hole respectively.

The structure of the second gas mixing chamber may be as follows: the outer ring portion includes inner ring wall surfaces and outer ring wall surfaces that are concentrically spaced, and a bottom wall connecting the inner ring wall surface and the outer ring wall surface, and the inner ring wall surface And the outer ring wall surface is covered with a sub cover plate, and the inner ring wall surface, the outer ring wall surface, the bottom wall, and the sub cover plate are collectively surrounded to form the second mixing chamber.

Further, the upper surface of the wall surface of the outer ring is formed with radial first main fire grooves and second main fire grooves at intervals along the circumferential direction, and the groove depth of the first main fire groove is greater than that of the second main fire groove. Grooving depth. The slot depth of the first main fire slot is greater than the slot depth of the second main fire slot, and it can form a supplementary gap of secondary air by itself.

Further, corresponding secondary air holes are distributed along the circumference of the main fire hole and the flame-stabilizing hole, and the secondary air holes are connected between the inner ring wall surface and the annular wall. And each secondary air hole is in communication with the air under the fire cover.

The primary air channel can be set up by using any kind of pipe connecting the outside world with the cavity of the base, and the same secondary air path can also be set up by any type of existing technology used to connect the outside world to the secondary air. In the present invention, considering the simple and compact structure of the burner, the primary air channel and the secondary air channel are formed in the following manner. The secondary air hole is downwardly provided with an annular wall. The annular wall surrounds an annular chamber, and the connecting body is provided with a plurality of radial secondary air passages for connecting the annular chamber and the outside in the circumferential direction. The primary air passage is also provided with a plurality of secondary air passages. And arranged along the connecting body in a radial direction circumferentially, and the secondary air passage is spaced from the primary air passage.

The secondary air passage and the primary air passage are spaced apart from each other, and may be spaced in the following manner: at least a pair of baffles provided along a circumferential direction of the plate body downwardly extend from a lower surface of the plate body of the connecting body, In a state where each pair of the baffles is resting on the base, an air inlet of the primary air passage formed by a gap between the pair of the baffles and the base.

Further, a notch is formed on an inner ring wall surface of the outer ring portion, and the notch is in communication with a cavity enclosed between the annular peripheral walls of the adjacent annular chambers, and the notch and the cavity together constitute a cavity. Mentioned transmission channel.

In order to allow the user to individually control the central fire formed by the inner ring portion of the burner and the peripheral fire formed by the outer ring portion, a ring-shaped wall of the inner ring portion and the main cover plate are formed between the first mixing chamber and the A third gas mixing chamber in which the second gas mixing chamber is phase-fluid-separated, the cavity of the base further contains at least one second ejector, and the base is provided with a space separate from the first ejector At least one second ejection channel of the channel, the second ejection channel being fluidly connected to the base and the second ejector. The fuel mixture of the third mixing chamber is directly supplied from the second injection channel, and is fluidly separated from the first mixing chamber and the second mixing chamber, so that it can be separately supplied.

Further, the top wall of the fire cover is provided with at least one through hole in the annular wall of the inner ring portion, and the through hole is convexly provided with a convex wall downward, and the cavity surrounded by the convex wall constitutes the cavity. The fuel mixture in the second injection channel enters the top opening of the third mixing chamber. Of course, in the present invention, the second ejection channel and the third gas mixing chamber can be limited to a tubular structure extending along the axial direction of the base and showing convergence-diffusion. The tubular structure is partially formed in the fire cover and part of the base is formed. Block formed.

According to the above-mentioned inventive concept, the second ejection channel is an axial venturi tube.

In order to avoid as far as possible the danger of explosion due to gas injection due to blockage of the injector, at least one partition plate is provided on the top wall of the fire cover, which partitions the third mixing chamber into at least two Independent chambers, each of which is in communication with the corresponding second ejection channel. The formation of the independent chamber can effectively prevent the gas from being reversed due to the blockage of one of the second injectors, thereby causing an explosion.

In order to satisfy the burner gas fire power controlled by the valve, the inner and outer ring fires can be used at the same time, or the inner ring fires can be used alone, especially in the flames in the inner, central and outer circumferential directions. The flames have basically no turbulence and interference. At the same time, it also has the function of cooking with low fire. A partition plate is also provided between the annular wall protruding upward from the inner ring portion and the main cover plate. At least one of the top surfaces of the partition plate is provided for passing through the first portion. The air outlet holes where the fuel mixture after the three mixing chambers are mixed out, the lower surface of the partition plate and the upper surface of the inner ring portion have a first gap, and the upper surface of the partition plate and the main cover plate have a second gap, The second gap forms a fire outlet of the inner ring portion.

In order to realize the structure of the partition plate and the main cover plate, a circle of convex rings is protruded upward at the center position of the upper surface of the inner ring portion, and the partition plate has a mounting hole that can rest on the convex ring at the corresponding position. The outer edge of the partition plate abuts the annular wall, and the upper surface of the partition plate is provided with at least two convex ribs for supporting the main cover plate at intervals in the circumferential direction. An annular convex wall that can pass through the mounting hole and is adapted to the convex ring extends from the position of the convex ring.

Compared with the prior art, the present invention has the advantages that the sandwich structure design of the first ejection channel is located in the outer peripheral chamber so that the primary air entering the chamber is more evenly distributed on the periphery of the central chamber. Therefore, under the action of the first injector, the gas in the central chamber can be more directly mixed with the primary air after being uniformed by the peripheral chamber, so as to prevent the gas and the primary air from converging in different directions to interact with each other. The impact, while further improving the uniformity of the primary air and gas mixing and the primary air intake rate, can also effectively reduce the loss of kinetic energy, so that the flame of the upwind burner is short, uniform and powerful, and no yellow flame, Defects such as tempering.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic exploded structure diagram of FIG. 1; FIG.

Figure 3 is a sectional view at an angle of Figure 1;

FIG. 4 is an enlarged schematic view at A in FIG. 3; FIG.

5 is a schematic structural diagram of a first ejection channel and a second ejection channel in an embodiment of the present invention;

6 is a cross-sectional view from another angle of FIG. 1;

7 is a schematic structural view of an angle of a fire cover in an embodiment of the present invention;

FIG. 8 is a schematic structural view of the fire cover at another angle in the embodiment of the present invention.

Detailed ways

The present invention is described in further detail below with reference to the embodiments of the accompanying drawings.

As shown in FIGS. 1 to 8, it is a preferred embodiment of the burner of the updraft cooker of the present invention. The cooker burner can be applied to both a traditional up-wind burner and an Italian Sabaf burner such as Europe. The cooker burner includes a base 1, a connecting body 2 provided on the base 1, a primary air passage 4, a fire cover 5 and a transmission passage 6 provided on the connecting body 2.

Wherein, the base 1 has a concave cavity 11 with an opening facing upward, and a first ejector 12 is provided at a central position of the concave cavity 11;

The connecting body 2 includes a plate body 21 having a vertical first ejection channel 3 at a central position of the plate body 21, and an outer periphery of the plate body 21 extends along the horizontal direction 211 and can cover the cavity 11;

The primary air passages 4 are arranged circumferentially and spaced along the connecting body 2. The primary air passages 4 are used to communicate the cavity 11 with the outside to introduce the primary air from the outside into the cavity 11 of the base 1;

A first mixing chamber 514 in the center and a second mixing chamber 525 in the periphery are formed between the fire cover 5 and the connecting body 2. The first mixing chamber 514 corresponds to the first ejection channel 3 and is used for Mix air and gas once.

The transmission channel 6 is used for transmitting the mixed primary air and gas from the first mixing chamber 514 to the second mixing chamber 525.

In order to effectively improve the uniformity of the primary air and gas mixing, the first ejection channel 3 is a sandwich structure, which includes a central chamber 311 located at the center and an outer peripheral chamber 312 surrounding the central chamber 311. The lower end entrance of the central chamber 311 and the base The recessed cavity 11 communicates with the first ejector 12, and the upper exit of the center chamber 311 communicates with the first gas mixing chamber 514. The lower end of the peripheral cavity 312 communicates with the recessed cavity 11 in the base, and the peripheral cavity The upper end of the chamber 312 is closed as a blind end.

In this embodiment, the first ejection channel 3 has a cylindrical structure that is open from top to bottom. The cylinder includes an inner peripheral wall 31 and an outer peripheral wall 32 spaced from the inside to the outside. The inner peripheral wall 31 divides the cylinder into a centrally located one. The central chamber 311 and the outer peripheral chamber 312 surrounding the central chamber 311, and the upper end edge of the inner peripheral wall 31 and the upper end edge of the outer peripheral wall 32 are connected to form a closed end surface 33. With the closed end surface 33, the center can be better The gas in the chamber 311 is directly mixed with the outer chamber 312 once to prevent the gas and the primary air from colliding with each other from different directions, thereby further improving the uniformity of the primary air evenly distributed on the outer periphery of the central chamber 311, At the same time of primary air intake rate, it can also effectively reduce kinetic energy loss. Meanwhile, the lower end edge of the outer peripheral wall 32 of the outer peripheral chamber 312 is lower than the lower end edge of the peripheral wall of the central chamber 311. This design enables a pre-mixing of air and gas first downstream of the central cavity, and then with the help of the low pressure caused by the Venturi effect obtained in the first mixing chamber 514 itself, the pre-mixed air and gas are sucked in The second mixing is performed after the first mixing chamber 514, which effectively improves the uniformity of the air and gas mixing once.

Specifically, the arrangement of the first air-mixing chamber 514 is preferably formed inside the fire cover 5 and has a recess 511 recessed from the bottom to the top and extending into the first ejection channel 3, and the recess 511 and the connecting body The plate body 21 of 2 constitutes the first gas mixing chamber 514, and a radial venturi cavity 60 is enclosed between the lower surface of the top wall of the groove 511 and the closed end surface 33 of the first ejection channel 3. The radial venturi cavity 60 is formed in the following manner. The closed end surface 33 of the first ejection channel 3 includes a first end surface 331 horizontally disposed and a second end surface gradually inclined downward from the inside along the lower edge of the first end surface 331. End surface 332, vertical distance D1 between first end surface 331 and lower surface of top wall of groove 511, vertical distance D2 between upper edge of second end surface 332 and lower surface of top wall of groove 511, and lower edge of second end surface 332 and groove The vertical distance D3 of the lower surface of the 511 top wall satisfies the following relationship: D1 <D2 <D3, thereby forming a radial venturi cavity 6. More preferably, the included angle α between the first end surface 331 and the second end surface 332 of the closed end surface 33 is 5 ° to 15 °, and in this embodiment, it is preferably 10 °.

Since the first ejection channel 3 and the radial venturi chamber 6 of the first mixing chamber 514 directly transition from a vertical 90 ° to a horizontal setting, other connecting components are omitted to reduce the local resistance loss, and the angle α The angle setting can reduce the resistance loss when the gas and primary air mixture is injected into the second mixing chamber 525, and the ejection is smoother and smoother. The included angle α is not as long as it can effectively reduce the local resistance loss. It is easy to cause the volume of the ejection tube to be too large.

In addition, the configuration of the second gas mixing chamber 525 may be as follows: the fire cover 5 includes an inner ring portion 51 and an outer ring portion 52 disposed at a concentric interval, and the groove 511 is provided inside the inner ring portion 51, and the inner ring The top end of the portion 51 is higher than the top end of the outer ring portion 52. The inner ring portion 51 includes an annular wall 512 protruding upward and a main cover plate 513 covering the annular wall 512. The annular wall 512 is formed at intervals in the circumferential direction. The main fire slot 5121 and the flame holding groove 5122 in the radial direction cooperate with the outer peripheral wall 32 of the main cover plate 513 to form a main fire hole and a flame holding hole, respectively. The outer ring portion 52 includes inner ring wall surfaces 521 and outer ring wall surfaces 522 arranged concentrically at a distance, and a bottom wall 523 connecting the inner ring wall surfaces 521 and the outer ring wall surfaces 522. The inner ring wall surfaces 521 and the outer ring wall surfaces 522 are covered with a sub cover plate. 524, the inner ring wall surface 521, the outer ring wall surface 522, the bottom wall 523, and the sub cover plate 524 are collectively surrounded to form a second gas mixing chamber 525. At the same time, the upper surface of the outer ring wall surface 522 is spaced along the circumferential direction with radial first main fire grooves 5221 and second main fire grooves 5222. The depth of the first main fire groove 5221 is greater than that of the second main fire grooves. The slot depth of 5222 can form a supplementary gap for secondary air.

In order to supplement the secondary air for the central fire formed by the inner ring portion 51, corresponding secondary air holes 7 are distributed along the circumference of the main fire hole and the flame stabilizing hole, and the secondary air holes 7 are opened on the inner ring wall surface 521. On the connection part with the annular wall 512, and each secondary air hole 7 is in communication with the secondary air passage 40 below the fire cover 5, the secondary air hole 7 also has a clever role to form the transmission passage 6 Part of the secondary air hole 7 is convexly provided with an annular peripheral wall 71 protruding downward, the annular peripheral wall 71 surrounds an annular cavity, and the base 1 is provided with a plurality of radial directions for communicating with the annular cavity in the circumferential direction. A gap 5211 is formed on the inner ring wall surface 521 of the outer ring portion 52 and the secondary air passage 40 of the outside, and the gap 5211 communicates with the cavity enclosed between the annular peripheral walls 72 of the adjacent annular chamber. The notch 5211 and The cavities together constitute a transmission channel 6. Similarly, a plurality of primary air passages 4 are also provided, and are arranged radially along the circumference of the base 1. The secondary air passages 40 and the primary air passages 4 extend downwardly through the lower surface of the plate body 21 of the connection body 2. At least one pair of baffles 212 arranged circumferentially and radially along the plate body 21 are spaced apart, and in a state where each pair of baffles 212 is resting on the base 1, a gap between each pair of baffles 212 and the base 1 The air inlet of the primary air passage 4 is formed. The significance of this separation is to effectively separate the primary air and secondary air passages 40 to avoid mutual influence.

In order to allow the user to individually control the central fire formed by the inner ring portion 51 of the burner and the outer fire formed by the outer ring portion 52, the first mixing chamber is formed between the annular wall 512 of the inner ring portion 51 and the main cover plate 513. The third mixing chamber 8 fluidly separated from the second mixing chamber 514 and the second mixing chamber 525. At least one second ejector 9 is also contained in the cavity 11 of the base 1, and the base 1 is provided with a space separate from the first At least one second ejection channel 10 of the ejection channel 3 is in fluid connection with the base 1 and the second ejector 9. The fuel mixture of the third mixing chamber 8 is directly supplied from the second injection channel 10 and is fluidly separated from the first mixing chamber 514 and the second mixing chamber 525, so that it can be separately supplied. In the embodiment, two second ejection channels 10 are provided, which are symmetrically arranged on both sides of the first ejection channel 3 in the circumferential direction, respectively, and at the same time, the purpose of making the central fire and the peripheral fire uniform is achieved. In addition, the top wall of the fire cover 5 is also provided with two corresponding through holes 50 inside the annular wall 512 of the inner ring portion 51. The through hole 50 is downwardly provided with a convex wall 501, and a cavity surrounded by the convex wall 501 constitutes The fuel mixture in the second injection channel 10 enters the top opening of the third mixing chamber 8.

In order to enhance the ejection capability, the present invention may jointly define the second ejection channel 10 and the third gas mixing chamber 8 in a tubular structure such as an axial venturi that extends along the axial direction of the base 1 and converges and diffuses. In the axial venturi tube portion, the opening formed in the fire cover 5 corresponds to the cavity surrounded by the convex wall 501 of the through hole 50, and the portion is formed in the connecting body 2 corresponding to the second ejection channel 10. In order to avoid a gas burner which is not easily caused by the blockage of any second ejector, which can cause an explosion, the burner of the cooker which causes an explosion, corresponding to the setting of the two through holes 50, a top wall of the fire cover 5 is provided with a radial penetration 510 Divides the partition plate 20, which divides the third mixing chamber 8 into two independent chambers such as a first independent chamber 201 and a second independent chamber 201 ', and the first independent chamber 201 and the second independent chamber The chambers 201 ′ are in communication with the corresponding second ejection channels 10. In addition, a partition 30 is also provided between the annular wall 512 and the main cover plate 513 protruding upward from the inner ring portion 51. A plurality of fuel mixtures for mixing by the third mixing chamber 8 are opened on the top surface of the partition 30. The outflow air outlet 301 has a first gap 302 between the lower surface of the partition plate 30 and the upper surface of the inner ring portion 51, and a second gap 303 between the upper surface of the partition plate 30 and the main cover plate 513. The second gap 303 constitutes the inner ring portion The fire exit of 51. Since the partition plate 30 has the effect of further reducing the gas velocity, the central flame of the inner ring and the small fire formed by the fire outlet are more uniform, so that the bottom of the pot is heated more uniformly. Due to such a structure, in use, in cooperation with a segmented gas valve, not only the inner ring portion 51 and the outer ring portion 52 of the fire cover 5 can be burned at the same time, but also the inner ring portion 51 can be selected to burn alone and the inner ring portion can be selected. The two ring fires of 51 burn at the same time, and different firepower can satisfy different cooking and different foods, and choose between different stages of cooking food, which is convenient to use. In order to facilitate the installation of the partition 30, a ring 510 protrudes upward from the center of the upper surface of the inner ring portion 51. The partition 30 has a mounting hole 304 that can rest on the ring 510 at the corresponding position, and the outside of the partition 30 The edge abuts the annular wall 512. The upper surface of the partition plate 30 is provided with at least two convex ribs 305 for supporting the main cover plate 513 along the circumferential direction. The main cover plate 513 extends downward at a position corresponding to the convex ring 510. There is an annular convex wall 5130 that can pass through the mounting hole 304 and is adapted to the convex ring 510.

Referring to FIG. 6, as described above, the path of the primary air, gas, and mixed primary air and gas inside the burner (see the dotted arrow) is as follows, since the first injector 12 to the first ejection channel 3 and the radial direction The low pressure caused by the gas injection in the first mixing chamber 514 of the Venturi effect, draws the primary air from the outside into the peripheral chamber 312 of the recess 11 of the base 1 through the primary air passage 4 (for simplicity, only shown A first ejection channel 3 and a transmission channel 6), and then the primary air is fed into the central chamber 311 by the kinetic energy of the gas itself, and the air and the gas are premixed, and finally the radial direction of the first mixing chamber 514 is radial The venturi effect cavity is further mixed and enters the second mixing chamber 525 through the transmission channel 6. The mixed primary air and gas finally flow out through the first main fire groove 5121 and the second main fire groove 5122 of the outer ring portion 52, and flow with The secondary air of the external environment is ignited together to form a peripheral fire. The fire cover 5 also includes a central fire that enables the user to control it individually. The primary air and gas required for the central fire are input to the third mixing chamber 8 by the second injection channel 10 independently of the first injection channel 3. At the same time, the third mixing chamber 8 is separated from the first mixing chamber 514 and the second mixing chamber 525. In this way, the fluid separation of the second mixing chamber 525 and the third mixing chamber 8 is achieved, and then they can be separated separately. It is supplied to the ground to allow the user to control the inflow of the fuel mixture into the first injection channel 3 and the second injection channel 10 separately. To adjust the size of the peripheral fire and the central fire, adjust the Just adjust the valve.

Claims

A stove burner includes:

The base (1) has a concave cavity (11) with an upward opening, and a first ejector (12) is arranged at the center of the concave cavity (11);

The connecting body (2) is arranged on the base (1) and includes a plate body (21). The plate body (21) has a vertical first ejection channel (3) in the center position. The outer periphery (211) of the plate body (21) extends in the horizontal direction and can cover the cavity (11);

A primary air channel (4) is arranged circumferentially and spaced along the connecting body (2), and is used to communicate the cavity (11) with the outside to introduce primary air from the outside into the cavity (1) of the base (1) ( 11) Within;

A fire cover (5) is disposed above the connecting body (2), and a first air mixing chamber (514) in the center and a second air mixing gas in the periphery are formed between the fire cover (5) and the connecting body (2). Chamber (525); the first gas mixing chamber (514) corresponds to the first ejection channel (3) for mixing air and gas once; and

A transmission channel (6) for transmitting the mixed primary air and gas from the first mixing chamber (514) to the second mixing chamber (525);

It is characterized by

The first ejection channel (3) is a sandwich structure, and includes a central chamber (311) located at the center and a peripheral chamber (312) surrounding the central chamber (311); The lower end inlet is in communication with the base cavity (11) and is opposite to the first ejector (12). The upper end outlet of the central chamber (311) and the first gas mixing chamber (514) ) Are connected; the lower end opening of the peripheral cavity (312) is in communication with the base cavity (11), and the upper end of the peripheral cavity (312) is closed as a blind end.
The cooker burner according to claim 1, characterized in that the first ejection channel (3) has a cylindrical structure which is open at the top and bottom, and the cylinder includes an inner peripheral wall spaced from the inside to the outside ( 31) and an outer peripheral wall (32), the inner peripheral wall (31) divides the cylinder into the central cavity (311) and the outer peripheral cavity (312), and the upper end edge of the inner peripheral wall (31) and Upper end edges of the outer peripheral wall (32) are connected one after another to form a closed end surface (33).
The cooker burner according to claim 1 or 2 or 3, characterized in that the lower end edge of the outer peripheral wall (32) of the outer peripheral chamber (312) is lower than the lower end edge of the peripheral wall of the central chamber (311).
The cooker burner according to claim 2, characterized in that the inside of the fire cover (5) has a recess (511) recessed from the bottom to the top and for the first ejection channel (3) to extend into. The groove (511) and the plate body (21) surround the first mixing chamber (514), and the lower surface of the top wall of the groove (511) and the first ejection channel (3) A radial venturi cavity (6) is enclosed between the closed end faces (33).
The cooker burner according to claim 4, characterized in that the closed end surface (33) of the first ejection channel (3) comprises a first end surface (331) disposed horizontally and along the first end surface (331) A second end surface (332) whose lower edge gradually slopes downward from the inside to the outside, a vertical distance D1 between the first end surface (331) and the lower surface of the top wall of the groove (511), and the second end surface (332 ) The vertical distance D2 between the upper edge and the lower surface of the top wall of the groove (511) and the vertical distance D3 between the lower edge of the second end surface (332) and the lower surface of the top wall of the groove (511) satisfy The relationship is as follows: D1 <D2 <D3, thereby forming the radial venturi cavity (60).
The cooker burner according to claim 5, wherein an included angle α between the first end surface (331) and the second end surface (332) is 5 ° to 15 °.
The cooker burner according to claim 4, characterized in that the fire cover (5) includes an inner ring portion (51) and an outer ring portion (52) which are arranged at a concentric interval, and the groove (511) is It is arranged inside the inner ring part (51), the top end of the inner ring part (51) is higher than the top end of the outer ring part (52), and the inner ring part (51) includes an annular wall protruding upward. (512) and a main cover plate (513) covering the annular wall (512), the annular wall (512) is formed with a radial main fire groove (5121) and a flame holding groove at intervals in the circumferential direction. (5122), and cooperate with the outer peripheral wall (32) of the main cover plate (513) to form a main fire hole and a flame stabilization hole, respectively.
The cooker burner according to claim 7, characterized in that the outer ring portion (52) comprises an inner ring wall surface (521) and an outer ring wall surface (522) and the inner ring wall surface (521) are arranged at concentric intervals. And the bottom wall (523) of the outer ring wall surface (522), the inner ring wall surface (521) and the outer ring wall surface (522) are covered with a sub cover plate (524), the inner ring wall surface (521), the outer ring The wall surface (522), the bottom wall (523), and the sub cover plate (524) are collectively surrounded to form the second gas mixing chamber (525).
The cooker burner according to claim 8, characterized in that: the first main fire groove (5221) and the second main fire are formed radially on the upper surface of the outer ring wall surface (522) at intervals along the circumferential direction. The groove (5222) and the depth of the first main fire groove (5221) are greater than the depth of the second main fire groove (5222).
The cooker burner according to claim 8, characterized in that the periphery of the main fire hole and the flame stabilizing hole is circumferentially spaced with corresponding secondary air holes (7), the secondary air holes ( 7) It is opened on the connection between the inner ring wall surface (521) and the annular wall (512), and each secondary air hole (7) is in communication with the air under the fire cover (5) .
The cooker burner according to claim 10, wherein the secondary air hole (7) is downwardly provided with an annular peripheral wall (71), and the annular peripheral wall (71) surrounds an annular cavity, so The connecting body (2) is provided along the circumferential direction with a plurality of radial secondary air passages (40) for connecting the annular chamber and the outside, and the primary air passage (4) is also provided with a plurality of, And arranged along the connecting body (2) circumferentially and radially, the secondary air passage (40) and the primary air passage (4) are spaced apart from each other.
The cooker burner according to claim 11, characterized in that: the lower surface of the plate body (21) of the connecting body (2) extends downwardly and radially along the plate body (21) circumferentially. At least one pair of baffles (212), in a state where each pair of the baffles (212) is resting on the base (1), between each pair of the baffles (212) and the base (1) The gap is the air inlet of the primary air channel (4).
The cooker burner according to claim 12, characterized in that: an inner ring wall surface (521) of the outer ring portion (52) is provided with a notch (5211), the notch (5211) and the adjacent annular chamber A cavity formed between the annular peripheral walls (71) is connected, and the notch (5211) and the cavity together form the transmission channel (6).
The cooker burner according to any one of claims 7 to 13, wherein an annular wall (512) of the inner ring portion (51) and a main cover plate (513) are formed between the annular wall (512) and the main cover plate (513). The first gas mixing chamber (514) and the second gas mixing chamber (525) are separated from each other by a third fluid mixing chamber (8), and the recess (11) of the base (1) further contains at least one first gas mixing chamber. Two ejectors (9), and the base (1) is provided with at least one second ejection channel (10) independent of the first ejection channel (3), the second ejection channel (10) In fluid communication with the base (1) and the second ejector (9).
The cooker burner according to claim 14, characterized in that at least one through hole (50) is provided around the top wall of the fire cover (5) in the annular wall (512) of the inner ring portion (51). The through hole (50) is convexly provided with a convex wall (501) downward, and a cavity surrounded by the convex wall (501) constitutes the second injection channel (10), and the fuel mixture enters the third mixture. The top of the air chamber (8) is open.
The cooker burner according to claim 15, wherein the second ejection channel (10) is an axial venturi tube.
The cooker burner according to claim 15 or 16, characterized in that at least one partition plate (20) is provided on the top wall of the fire cover (5), and the partition plate (20) connects the third The gas mixing chamber (8) is partitioned into at least two independent chambers (201, 201 '), and each independent chamber is in communication with the corresponding second injection channel (10).
The cooker burner according to claim 14 or 15 or 16, wherein a partition plate is further provided between the annular wall (512) protruding upward from the inner ring portion (51) and the main cover plate (513). (30) The top surface of the partition plate (30) is provided with at least one air outlet (301) for the fuel mixture mixed by the third mixing chamber (8) to flow out, and the partition plate (30) There is a first gap (302) between the lower surface and the upper surface of the inner ring portion (51), and there is a second gap (303) between the upper surface of the partition (30) and the main cover plate (513). The two gaps (303) constitute a fire outlet of the inner ring portion (51).
The cooker burner according to claim 18, characterized in that: a center of the upper surface of the inner ring portion (51) is provided with a convex ring (510) protruding upward, and the partition plate (30) has a corresponding position The mounting hole (304) can be placed on the convex ring (510), the outer edge of the partition plate (30) abuts the annular wall (512), and the upper surface of the partition plate (30) is along the circumferential direction At least two convex ribs (305) for supporting the main cover plate (513) are arranged at intervals, and the main cover plate (513) extends downward at a position corresponding to the convex ring (510) and can pass through. An annular convex wall (5130) of the mounting hole (304) and adapted to the convex ring (510).