CN219083078U - Injection assembly, injection system and gas stove of combustor - Google Patents

Abstract

An injection assembly for a burner, comprising: the device comprises an injection pipe and an air inlet seat, wherein the injection pipe is provided with an air inlet, the length direction of the injection pipe is a first axial direction, and the direction surrounding the first axial direction is a first circumferential direction; the air inlet seat is provided with a fuel gas channel and a blast air channel; the air inlet seat is positioned at the upstream of the air inlet of the injection pipe along the flowing direction of the fuel gas; the air inlet is divided into at least two parts by the partition piece, wherein the partition piece is arranged in the injection pipe at a position adjacent to the air inlet and extends along the first axial direction: a first part opposite to the gas outlet of the gas channel, and a second part opposite to the air outlet of the blast air channel. The utility model also discloses an injection system with the injection assembly and a gas cooker. Compared with the prior art, the utility model can reduce the risk of interference between the blown air and the fuel gas sprayed out by the fuel gas nozzle.

Description

Injection assembly, injection system and gas stove of combustor

Technical Field

The utility model belongs to the technical field of household kitchen ware, and particularly relates to an injection assembly of a combustor, an injection system and a gas cooker.

Background

In the existing gas cooker, in order to improve the supply quantity of primary air and enable gas to burn more completely, a blast burner is designed, such as the structure disclosed in the utility model patent with patent number ZL200720088825.9 (patent publication number CN 201166369Y), of an injection type blast burner for gas cooker, which comprises an injector, a gas connecting pipe, a gas nozzle, a combustion chamber, a flame stabilizing hole assembly, an air chamber and an axial fan, wherein a circle of secondary air port is arranged at the bottom edge of the combustion chamber, the flame stabilizing hole assembly is uniformly distributed at the bottom of the combustion chamber, the bottom of the flame hole assembly is communicated with the head of the injector, the tail of the injector is connected with the axial fan through the air chamber, and the gas nozzle is connected with the gas connecting pipe and is fixed in the center of the air chamber.

The existing injection assembly has the following technical problems:

firstly, the blast air and the fuel gas enter the injection pipe after passing through an air inlet of the injection pipe, and in the process, the problem of mutual interference exists between the blast air and the fuel gas;

secondly, because the gas nozzle is positioned in the center of the air chamber, the air flow blown out from the air chamber can surround the periphery of the gas nozzle, so that the air introduced by the air blowing device can form a circle of air curtain to blow the air near the air inlet of the injection pipe outwards, and the capability of injecting natural air during injection of the gas nozzle can be influenced;

thirdly, the mixing of the gas and air in the injection pipe is uneven, for example: when the burner works, air in the stove shell is heated to cause higher ambient temperature, and the temperature of the air is obviously increased when the air is closer to the burner, when the air is at high temperature, the gas emitted by the gas nozzle is rapidly heated, the volume is rapidly increased, the density is reduced, the influence of buoyancy on the gas injection direction cannot be ignored, and the trace line of the gas injection has a certain upward inclination, so that the air in the injection pipe and the gas are unevenly mixed.

Disclosure of Invention

The first technical problem to be solved by the utility model is to provide an injection assembly of a burner for reducing the risk of interference between the blown air and the gas ejected from the gas nozzle.

The second technical problem to be solved by the utility model is to provide an injection assembly of a burner, so as to improve the mixing uniformity between the gas emitted by a gas nozzle and the blown air.

The third technical problem to be solved by the utility model is to provide an injection system with the injection assembly.

The fourth technical problem to be solved by the utility model is to provide a gas cooker with the injection system.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: an injection assembly for a burner, comprising:

the ejector tube is provided with an air inlet, the length direction of the ejector tube is a first axial direction, and the direction surrounding the first axial direction is a first circumferential direction;

an air inlet seat having a gas passage and a blast air passage, wherein the gas inlet of the gas passage is for fluid communication with a gas source and the air inlet of the blast air passage is for fluid communication with a blast source;

the air inlet seat is positioned at the upstream of the air inlet of the injection pipe along the flowing direction of the fuel gas;

it is characterized in that the method also comprises the following steps:

the separating piece is arranged at a position adjacent to the air inlet in the injection pipe and extends along the first axial direction to separate the air inlet into at least two parts: a first part opposite to the gas outlet of the gas channel, and a second part opposite to the air outlet of the blast air channel.

In this way, the gas emitted from the gas outlet can enter the injection pipe through the first part of the gas inlet, and the blast air emitted from the air outlet can enter the injection pipe through the second part of the gas inlet, so that the interference of the gas and the blast air at the gas inlet of the injection pipe can be avoided.

The air inlet seat can be a single component formed with the gas channel and the blast air channel, or can be an assembly for arranging and limiting the independent gas channel and the blast air channel together.

The partition may be a partition extending in the first axial direction, and the number of the partition may be one, two or more, for example, one partition may divide the air inlet into two parts, and two parallel partitions may divide the air inlet into three parts.

Preferably, the partition member includes a cylindrical body having a hollow interior and open at both ends, the cylindrical body extending in a first axial direction, and an outer peripheral wall of the cylindrical body being opposed to an inner peripheral wall of the ejector pipe to form an annular chamber, so that the cylindrical body member partitions the air inlet into the first portion located in the cylindrical body and the second portion located at an outer periphery of the peripheral wall of the cylindrical body;

or, the partition member includes a cylindrical body having a hollow interior and open at both ends, the cylindrical body extending in the first axial direction, and an outer peripheral wall of the cylindrical body being opposed to an inner peripheral wall of the ejector pipe to form an annular chamber, so that the cylindrical body member partitions the air inlet into the second portion located in the cylindrical body and the first portion located at the outer periphery of the peripheral wall of the cylindrical body.

The separator of the cylinder is beneficial to the uniform mixing between the fuel gas and the blast air after passing through the air inlet.

In order to further solve the second technical problem, preferably, the second portion of the air inlet of the ejector pipe is located at the periphery of the first portion, and the air outlets of the blast air channels are at least two and are spaced apart along the first circumferential direction.

Therefore, at least two air outlets which are arranged at intervals along the first circumference can ensure the balance of blast volume, is beneficial to the mixing between the fuel gas and the blast air, and improves the mixing uniformity between the fuel gas and the blast air. Meanwhile, the air outlets are arranged at intervals, so that the part, which is not provided with the air outlets, of the peripheral area of the gas outlet can be subjected to natural injection of outside air, and the influence of the arrangement of the air outlets on the natural injection is avoided.

Preferably, the central axis of the cylinder coincides with the central axis of the ejector pipe.

Preferably, the two air outlets of the blast air channel are distributed on the upper side and the lower side of the gas outlet of the gas channel. Thus, the blast air flow from the air outlet above the gas outlet can downwards press the gas, so that the gas is released from floating upwards, and the blast air flow from the air outlet below the gas outlet can ensure that the air can be supplemented below the gas, so that the air inflow above and below the gas is uniform.

In order to allow the blast air flow to be smoothly discharged, it is preferable that the blast air passage extends in the above-described first axial direction.

Preferably, along the gas flowing direction, the gas channel is provided with a gas inlet section, a buffer section and a gas outlet section which are sequentially communicated, the gas inlet section extends along the direction crossing the first axial direction, a port of the gas inlet section is a gas inlet of the gas channel, the gas outlet section extends along the first axial direction, and a port of the gas outlet section is a gas outlet of the gas channel. Thus, the gas inlet and the air inlet are not arranged on the same side of the air inlet seat, so that the input of a gas source and the installation of the air blowing device are facilitated; meanwhile, the arrangement of the air inlet section, the buffer chamber and the air outlet section can ensure that the fuel gas is smoothly and stably output from the fuel gas outlet, and reduce the risk of turbulent flow of the fuel gas.

In order to enable the gas channel and the air blowing channel in the air inlet seat to work well, preferably, an upper cavity and a lower cavity which are arranged up and down and extend along the first axial direction are arranged in the air inlet seat and are separated by an intermediate baffle plate, the upper cavity and the lower cavity jointly form the air blowing channel, and two air outlets of the air blowing channel are respectively opposite to and communicated with the upper cavity and the lower cavity;

the middle baffle plate is formed with a hollow part serving as a buffer section and an air outlet section of the gas channel, and the extending direction of the buffer section is consistent with the extending direction of the air inlet section of the gas channel.

Therefore, the middle baffle plate can be used for forming the buffer section and the air outlet section of the gas channel and separating the inner space of the air inlet seat, so that the gas channel and the air blowing air channel are not interfered with each other, and both the gas channel and the air blowing air channel can work well, and air flow can smoothly flow through the corresponding channels. And the structure is compact.

Preferably, the partition piece further comprises two partition plates, the partition plates are oppositely arranged in the annular cavity of the injection pipe, the annular cavity is divided into an upper cavity and a lower cavity, the upper cavity is opposite to the air outlet on the upper side of the fuel gas outlet, and the lower cavity is opposite to the air outlet on the lower side of the fuel gas outlet. So, the upper cavity of spaced apart, lower cavity can also prevent the mutual interference between two strands of blast air flows, and when the baffle links to each other with the tube-shape body, draw and penetrate the pipe simultaneously, the baffle can also play the effect of supporting the tube-shape body for the tube-shape body can be restrained in drawing the pipe steadily.

In each of the above schemes, preferably, the ejector tube has a constriction section, the flow area on the cross section of the constriction section is gradually reduced along the gas flow direction, the downstream port of the constriction section is a roar, the upstream port of the constriction section is the air inlet of the ejector tube, and the cylindrical body extends from the air inlet of the ejector tube to the roar. In this way, the gas and the blast air flow in the contraction section are separated from each other, and are mixed after passing through the contraction section.

Preferably, the flow area in the cross section of the interior of the cartridge is tapered in the direction of the gas flow.

Preferably, the flow area in the cross section of the annular chamber is tapered in the direction of the gas flow.

Further, a first vane spirally wound around the outer peripheral wall of the cylindrical body in the first axial direction is provided in the annular chamber.

Further, the air outlet of the blast air passage is annular, and second blades spirally wound in the first axial direction along an inner peripheral wall surrounding the air outlet are provided therein.

Thus, the blast air can be ejected from the air outlet in a spiral mode and enter the injection pipe in a spiral mode, and the negative pressure at the air outlet can be increased by the spiral airflow, so that the natural injection effect is improved.

The gas passage and the blast air passage may be isolated from each other or not. Preferably, the gas passage and the blast air passage are isolated from each other. The isolated gas channel and the blast air channel enable the gas and the blast to be mixed only in the injection pipe, so that the gas channel is only provided with the gas without air, and the condition that the gas in the gas channel explodes due to contact with air can be avoided.

Preferably, the air inlet seat is formed with a gas channel, a blast air channel and an air outlet end wall opposite to the air inlet of the injection pipe, and the gas outlet of the gas channel and the air outlet of the blast air channel penetrate through the air outlet end wall. The air inlet seat is a single part formed with a gas channel and a blast air channel, and the gas outlets and the air outlets are distributed on the air outlet end wall at intervals.

In order to further avoid the blast air flow from affecting the natural injection, it is preferred that a first gap exists between the gas outlet of the gas channel and the gas inlet of the injection pipe in the gas flow direction. When blowing, the peripheral area of the gas outlet can carry out natural injection of outside air; when the blowing is stopped, the gas emitted from the gas outlet can also jet natural air, and at the moment, the small fire work of the gas stove can be realized.

Preferably, in the direction of the blast air flow, a second gap exists between the air outlet of the blast air channel and the air inlet of the ejector pipe; thus, the negative pressure generated during the ejection of the blast air can also eject the natural air.

Or alternatively, the first and second heat exchangers may be,

the end face of the air outlet of the blast air channel extends into the second part of the air inlet of the ejector pipe.

In the above aspects, preferably, a sum of flow areas of the air outlets of the respective blast air passages is larger than a flow area of the gas outlet of the gas passage. Therefore, under the condition of the same flow, the fuel gas can be sprayed out from the fuel gas outlet at a higher speed, so that the air can be better injected.

The technical scheme adopted by the utility model for solving the third technical problem is as follows: an ejector system having an ejector assembly as described above, characterized by: and a blowing device serving as a blowing air source, wherein the air outlet end of the blowing device is in fluid communication with the air inlet of the blowing air channel of the air inlet seat.

The technical scheme adopted by the utility model for solving the fourth technical problem is as follows: a gas cooker having an injection system as described above.

Compared with the prior art, the utility model has the advantages that: through set up the separator in the air inlet of injection pipe, the separator separates the air inlet into two at least parts, be first part, second part respectively, first part is relative with the gas outlet of gas passageway, the second part is relative with the air outlet of blast air passageway, so, the gas that jets out from the gas outlet can get into the injection intraductal through the first part of air inlet, the blast air that jets out from the air outlet can get into the injection intraductal through the second part of air inlet to can avoid gas, blast air to take place to interfere in the air inlet department of injection pipe.

Drawings

FIG. 1 is a schematic view of an ejector assembly according to a first embodiment of the present utility model;

FIG. 2 is a longitudinal cross-sectional view of FIG. 1;

FIG. 3 is a schematic view showing the structure between the ejector pipe and the partition in the first embodiment of the present utility model;

FIG. 4 is a schematic view of an air inlet seat according to an embodiment of the present utility model;

FIG. 5 is a schematic view of an air intake seat according to an embodiment of the present utility model;

FIG. 6 is a cross-sectional view (cross-section is a vertical plane extending along a first axial direction) of an intake seat according to a first embodiment of the present utility model;

FIG. 7 is another cross-sectional view (cross-section is a vertical plane extending in a direction perpendicular to the first axial direction) of the intake seat according to the first embodiment of the present utility model;

FIG. 8 is a schematic view of a gas stove according to an embodiment of the present utility model;

FIG. 9 is a schematic structural view of an ejector assembly according to a second embodiment of the present utility model;

FIG. 10 is a longitudinal cross-sectional view of FIG. 9;

FIG. 11 is a schematic structural view of an ejector assembly according to a third embodiment of the present utility model;

FIG. 12 is a longitudinal cross-sectional view of FIG. 11;

FIG. 13 is a schematic view showing the structure between the ejector tube and the partition in the third embodiment of the present utility model;

FIG. 14 is a schematic structural view of an ejector assembly according to a fourth embodiment of the present utility model;

FIG. 15 is a longitudinal cross-sectional view of FIG. 14;

FIG. 16 is a schematic view of a structure of an air inlet seat according to a fourth embodiment of the present utility model;

FIG. 17 is a transverse cross-sectional view of a fifth embodiment of the utility model between the ejector tube and the divider.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

Embodiment one:

as shown in fig. 1 to 8, the injection assembly, the injection system and the gas cooker of the utility model are a preferred embodiment one, and the injection assembly comprises an injection pipe 1, an air inlet seat 4 and a partition 2.

The ejector pipe 1 is basically horizontally arranged and comprises a contraction section 1a, the downstream port of the contraction section 1a is a roar 13, the upstream port is an air inlet 10, and the cross section of the ejector pipe is gradually reduced from the air inlet 10 to the roar 13; the longitudinal direction of the ejector tube 1 is a first axial direction, and the direction around the first axial direction is a first circumferential direction.

As shown in fig. 1 to 3, the partition 2 is disposed in the contraction section 1a of the ejector tube 1, and includes a cylindrical body 21 extending in the first axial direction, having a hollow interior and two open ends, the cylindrical body 21 extending from the air inlet 1 to the throat 13 of the ejector tube 1, and a central axis of the cylindrical body 21 being coincident with a central axis of the ejector tube 1. The outer peripheral wall of the cylindrical body 21 is opposite to the inner peripheral wall of the injection pipe 1 to form an annular chamber 100, and the cylindrical body 21 divides the air inlet 10 into two parts, namely a first part 11 positioned in the cylindrical body 21 and a second part 12 positioned at the periphery of the peripheral wall of the cylindrical body 21. Meanwhile, in the present embodiment, the shape of the cylindrical body 21 matches the shape of the constriction 1a of the ejector tube 1, and the cross section of the cylindrical body 21 gradually decreases in the gas flow direction, and the flow area on the cross section of the annular chamber 100 gradually decreases. The cylindrical body 21 in this embodiment is restrained in the contraction section 1a by at least two support arms 211, and at least two support arms 211 are arranged at intervals along the first circumferential direction and are arranged in the annular chamber 100 adjacent to the roar 13, and two ends of each support arm 211 are respectively connected with the cylindrical body 21 and the contraction section 1a.

The inlet seat 4 is located upstream of the inlet 10 of the ejector tube 1 in the direction of the flow of the fuel gas. The inlet seat 4 is formed with a gas passage 41 and a blast air passage 42 isolated from each other, and an outlet end wall 400 opposed to the inlet 10 of the injection pipe 1. Specifically, as shown in fig. 5 to 7, the air inlet seat 4 has an upper cavity 4a and a lower cavity 4b which are arranged up and down and extend along the first axial direction, the two cavities are separated by an intermediate baffle 44, the air outlet 42b of the air blast air channel 42 is annular, penetrates through the air outlet end wall 400 of the air inlet seat 4 and is partially opposite to and communicated with the upper cavity 4a and the lower cavity 4b, at this time, the upper cavity 4a and the lower cavity 4b together form the air blast air channel 42, and the annular air outlet 42b of the air blast air channel 42 is opposite to the second part 12 of the air inlet 10 of the ejector tube 1; in the direction of the blast air flow, a second gap 402 exists between the air outlet 42b of the blast air passage 42 and the air inlet 10 of the ejector tube 1. The air inlet 42b of the blast air channel 42 is adapted to be in fluid communication with a source of blast air and is located on an end wall of the inlet seat 4 opposite the outlet end wall 400.

As shown in fig. 2, 6 and 7, along the gas flow direction, the gas channel 41 has an inlet section 411, a buffer section 412 and an outlet section 413 which are sequentially communicated, the inlet section 411 extends along the direction perpendicular to the first axial direction, and a port of the inlet section 411 is a gas inlet 41a of the gas channel 41 for fluid communication with a gas source. The outlet section 413 extends in the first axial direction, and a port of the outlet section 413 serves as a gas outlet 41b of the gas passage 41, penetrates the outlet end wall 400, is located in a circular shape of the annular air outlet 42b, and is opposed to the first portion 12 of the inlet 10 of the ejector tube 1. In the present embodiment, the middle baffle 44 is formed with a hollow portion as the buffer section 412 and the air outlet section 413 of the gas passage 41, and the extending direction of the buffer section 412 is identical to the extending direction of the air inlet section 411 of the gas passage 41. In the gas flow direction, a first gap 401 exists between the gas outlet 41b of the gas passage 41 and the gas inlet 10 of the ejector pipe 1. In this way, the gas ejected from the gas outlet 41b can be favorably ejected to the outside natural air without being affected by the air flow ejected from the air outlet 42 b.

Meanwhile, the sum of the flow areas of the air outlets 42b of the respective blast air passages 42 is larger than the flow area of the gas outlets 41b of the gas passage 41.

As shown in fig. 8, the injection system of the present embodiment includes the injection assembly described above and the blower device 5 as the blower air source, and the air outlet end of the blower device 5 is in fluid communication with the air inlet 42a of the blower air passage 42 of the air inlet seat 4. In this way, the air flow outputted from the blower 5 can flow out from the air outlet 42b after passing through the blower air passage 42. The blower device 5 may employ an existing blower, and controls whether the air outlet 42b has an air flow out by controlling the start-up or stop of the blower, specifically: when blowing, the peripheral area of the gas outlet 41b can perform natural injection of outside air; when the blowing is stopped, the natural air can be ejected by the gas ejected from the gas outlet 41b, and at this time, the gas range can be operated with a small fire. Meanwhile, the flow rate and flow rate of the air flow flowing out of the air outlet 42b can be controlled by controlling the operation power of the blower 5.

As shown in fig. 8, the gas cooker of the embodiment has a burner in addition to the injection system described above, and the burner is in the prior art and is communicated with the air outlet of the injection pipe 1.

Embodiment two:

as shown in fig. 9 and 10, a second preferred embodiment of the injection assembly, the injection system and the gas cooker of the burner according to the present utility model is basically the same as the first preferred embodiment, except that the annular chamber 100 of the injection pipe 1 in this preferred embodiment is provided with the first vane 14 spirally wound around the outer peripheral wall of the cylindrical body 21 in the first axial direction. The air outlet 42b of the blast air channel 42 has a ring shape in which second blades 43 spirally wound in the first axial direction along an inner peripheral wall surrounding the air outlet 42b are provided. The blown air can be discharged from the air outlet 42b in a spiral manner and flow forward in the annular chamber 100 in a spiral manner. Thus, the negative pressure generated by the blast air flow can be increased, and the natural injection is promoted.

And the first vane 14 in the present embodiment can serve to connect the cylindrical body 21 and the ejector pipe 1, so that the support arm 211 in the first embodiment is not required to be additionally provided in the present embodiment.

Embodiment III:

as shown in fig. 11 to 13, a preferred embodiment of a burner injection assembly, injection system and gas cooker according to the present utility model is basically the same as the first embodiment, except that in this embodiment, two air outlets 42b of the blast air channel 42 are arranged one above the other, and penetrate through the air outlet end wall 400 of the air inlet seat 4 respectively, and are opposite to and communicated with the upper cavity 4a and the lower cavity 4b respectively.

The partition 2 further includes two partitions 22 extending in the first axial direction, and are disposed in the annular chamber 100 of the injection pipe 1 to partition the annular chamber 100 into an upper chamber 110 and a lower chamber 120, wherein the upper chamber 110 is opposite to the air outlet 42b located on the upper side of the gas outlet 41b, and the lower chamber 120 is opposite to the air outlet 42b located on the lower side of the gas outlet 41 b. In this way, the two blast airflows emitted from the two air outlets 42b can enter the respective upper and lower chambers 110, 120, respectively, so that the mutual interference between the two blast airflows can be avoided.

And two air outlets 42b arranged one above the other are advantageous for natural ejection.

Also, the partition 22 in this embodiment can serve to connect the cylindrical body 21 and the ejector pipe 1, so that the support arm 211 in the first embodiment need not be provided in addition in this embodiment.

Embodiment four:

as shown in fig. 14 to 16, a preferred embodiment of the injection assembly, injection system and gas cooker of the burner according to the present utility model is basically the same as the third embodiment, except that the end face of the air outlet 42b of the blast air channel 42 in this embodiment extends into the second portion 12 of the air inlet 10 of the injection pipe 1.

Fifth embodiment:

as shown in fig. 17, a fifth preferred embodiment of a burner injection assembly, an injection system and a gas cooker according to the present utility model is basically the same as the third preferred embodiment, in which the partition 2 is two partition plates extending along the first axial direction, and the two partition plates are disposed in the contraction section 1a at intervals one above the other, so that the air inlet 10 is divided into a first portion 11 located in the center, a second portion 12 located on the upper and lower sides of the first portion 11, and air outlets 42b disposed one above the other are respectively opposite to the corresponding second portions 12, and the gas outlets 41b are opposite to the first portion 11.

The term "fluid communication" as used herein refers to a spatial positional relationship between two components or parts (hereinafter collectively referred to as a first part and a second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow along a flow path from the first part to the second part or/and be transported to the second part, or the first part and the second part may be directly communicated with each other, or the first part and the second part may be indirectly communicated with each other through at least one third party, and the third party may be a fluid channel such as a pipe, a channel, a conduit, a flow guiding member, a hole, a groove, or the like, or a chamber allowing the fluid to flow through, or a combination thereof.

Claims (21)

1. An injection assembly for a burner, comprising:

the ejector tube (1) is provided with an air inlet (10), the length direction of the ejector tube (1) is a first axial direction, and the direction surrounding the first axial direction is a first circumferential direction;

an air intake seat (4) having a gas passage (41) and a blast air passage (42), wherein a gas inlet (41 a) of the gas passage (41) is for fluid communication with a gas source and an air inlet (42 a) of the blast air passage (42) is for fluid communication with a blast air source;

the air inlet seat (4) is positioned at the upstream of the air inlet (10) of the injection pipe (1) along the flowing direction of the fuel gas;

it is characterized in that the method also comprises the following steps:

the partition piece (2) is arranged in the ejector pipe (1) at a position adjacent to the air inlet (10) and extends along the first axial direction to divide the air inlet (10) into at least two parts: a first portion (11), a second portion (12), the first portion (11) being opposite to a gas outlet (41 b) of the gas passage (41), the second portion (12) being opposite to an air outlet (42 b) of the blast air passage (42).

2. The injection assembly of claim 1 wherein: the partition (2) comprises a cylindrical body (21) with hollow inside and two open ends, the cylindrical body (21) extends along the first axial direction, the outer peripheral wall of the cylindrical body (21) is opposite to the inner peripheral wall of the injection pipe (1) to form an annular chamber (100), and the air inlet (10) is partitioned into the first part (11) positioned in the cylindrical body (21) and the second part (12) positioned at the periphery of the peripheral wall of the cylindrical body (21) by the cylindrical body (21);

or, the partition member (2) comprises a cylindrical body (21) which is hollow in the interior and is open at two ends, the cylindrical body (21) extends along the first axial direction, and the outer peripheral wall of the cylindrical body (21) is opposite to the inner peripheral wall of the injection pipe (1) to form an annular chamber (100), so that the cylindrical body (21) divides the air inlet (10) into the second part (12) positioned in the cylindrical body (21) and the first part (11) positioned at the periphery of the peripheral wall of the cylindrical body (21).

3. The injection assembly of claim 2 wherein: the second part (12) of the air inlet (10) of the ejector pipe (1) is positioned at the periphery of the first part (11), and at least two air outlets (42 b) of the blast air channel (42) are arranged at intervals along the first circumference.

4. An ejector assembly according to claim 3, wherein: the central axis of the cylindrical body (21) coincides with the central axis of the injection pipe (1).

5. An ejector assembly according to claim 3, wherein: the two air outlets (42 b) of the blast air channel (42) are distributed on the upper side and the lower side of the gas outlet (41 b) of the gas channel (41).

6. The injection assembly of claim 5 wherein: the blast air channel (42) extends in the first axial direction.

7. The injection assembly of claim 6 wherein: along the gas flow direction, gas passageway (41) have air inlet section (411), buffer section (412) and the section of giving vent to anger (413) that are linked together in proper order, air inlet section (411) are along the direction that crosses with above-mentioned first axial, and the port of air inlet section (411) is gas entry (41 a) of gas passageway (41), the section of giving vent to anger (413) are along above-mentioned first axial extension, the port of section of giving vent to anger (413) is gas outlet (41 b) of gas passageway (41).

8. The injection assembly of claim 7 wherein: the inside of the air inlet seat (4) is provided with an upper cavity (4 a) and a lower cavity (4 b) which are arranged up and down and extend along a first axial direction, the upper cavity (4 a) and the lower cavity (4 b) are separated by an intermediate baffle plate (44) to form the blast air channel (42), and two air outlets (42 b) of the blast air channel (42) are respectively opposite to and communicated with the upper cavity (4 a) and the lower cavity (4 b);

the intermediate baffle (44) is formed with a hollow portion as a buffer section (412) and an air outlet section (413) of the gas passage (41), and the extending direction of the buffer section (412) is identical to the extending direction of the air inlet section (411) of the gas passage (41).

9. The injection assembly of claim 5 wherein: the partition piece (2) further comprises two partition plates (22), the partition plates are oppositely arranged in the annular chamber (100) of the injection pipe (1), the annular chamber (100) is divided into an upper chamber (110) and a lower chamber (120), the upper chamber (110) is opposite to an air outlet (42 b) positioned on the upper side of the fuel gas outlet (41 b), and the lower chamber (120) is opposite to an air outlet (42 b) positioned on the lower side of the fuel gas outlet (41 b).

10. An ejector assembly as claimed in any one of claims 2 to 9, wherein: the injection pipe (1) is provided with a contraction section (1 a), the flow area on the cross section of the contraction section (1 a) is gradually reduced along the flow direction of the fuel gas, the downstream port of the contraction section (1 a) is a roar (13), the upstream port of the contraction section (1 a) is an air inlet (10) of the injection pipe (1), and the cylindrical body (21) extends from the air inlet (10) of the injection pipe (1) to the roar (13).

11. The injection assembly of claim 10 wherein: the flow area in the cross section of the interior of the cylinder (21) is gradually reduced in the direction of the gas flow.

12. The injection assembly of claim 10 wherein: the flow area in the cross section of the annular chamber (100) decreases gradually in the direction of the gas flow.

13. The injection assembly of claim 10 wherein: the annular chamber (100) is provided therein with first blades (14) spirally wound around the outer peripheral wall of the cylindrical body (21) in the first axial direction.

14. The injection assembly of claim 13 wherein: the air outlet (42 b) of the blast air passage (42) is annular, and second blades (43) spirally wound in the first axial direction along an inner peripheral wall surrounding the air outlet (42 b) are provided therein.

15. An ejector assembly as claimed in any one of claims 1 to 9, wherein: the gas channel (41) and the blast air channel (42) are isolated from each other.

16. The injection assembly of claim 15 wherein: the air inlet seat (4) is provided with a fuel gas channel (41), an air blasting air channel (42) and an air outlet end wall (400) opposite to the air inlet (10) of the injection pipe (1), and a fuel gas outlet (41 b) of the fuel gas channel (41) and an air outlet (42 b) of the air blasting air channel (42) penetrate through the air outlet end wall (400).

17. The injection assembly of claim 16 wherein: a first gap (401) is provided between a gas outlet (41 b) of the gas passage (41) and an air inlet (10) of the ejector pipe (1) in the gas flow direction.

18. The injection assembly of claim 17 wherein: a second gap (402) is formed between the air outlet (42 b) of the blast air passage (42) and the air inlet (10) of the ejector pipe (1) in the blast air flow direction;

or alternatively, the first and second heat exchangers may be,

the end face of the blast air channel (42) at which the air outlet (42 b) is located extends into the second portion (12) of the air inlet (10) of the ejector tube (1).

19. An ejector assembly as claimed in any one of claims 3 to 9, wherein: the sum of the flow areas of the air outlets (42 b) of the respective blast air passages (42) is larger than the flow area of the gas outlet (41 b) of the gas passage (41).

20. An ejector system having an ejector assembly according to any one of claims 1 to 19, wherein: also included is a blower device (5) as a source of blowing air, the outlet end of the blower device (5) being in fluid communication with the air inlet (42 a) of the blower air channel (42) of the air inlet seat (4).

21. A gas cooker having the injection system of claim 20.

Images