CN211822388U - Ejector, furnace end, combustor and gas-cooker - Google Patents

Abstract

The utility model provides an ejector, furnace end, combustor and gas-cooker relates to cooking utensils technical field. The ejector comprises a first ejector pipe and a pressure relief piece, wherein a pressure relief groove is formed in the pressure relief piece, the first ejector pipe comprises a diffusion pipe, a conical diffusion channel is formed in the diffusion pipe, the air outlet end of the diffusion pipe is fixedly connected to the pressure relief piece, the diffusion channel is communicated with the pressure relief groove, and the communication position of the diffusion channel is positioned at the bottom of the pressure relief groove; the diffusion channel extends towards the pressure relief groove along the generatrix to form an extension cavity, and the part of the extension cavity, which is positioned in the pressure relief groove, is completely accommodated in the pressure relief groove. The burner comprises a burner head seat and the ejector, wherein a gas mixing cavity is arranged in the burner head seat, and a gas inlet of the gas mixing cavity is communicated with a notch of the pressure relief groove in a matching manner. The burner comprises the furnace end; the gas stove comprises the burner. When the ejector is of a certain length, the arrangement of the pressure relief piece can increase the diffusion volume of the ejector pipe, and accordingly the ejection gas mixing effect of the ejector is improved.

Description

Ejector, furnace end, combustor and gas-cooker

Technical Field

The utility model belongs to the technical field of cooking utensils technique and specifically relates to an ejector, furnace end, combustor and gas-cooker are related to.

Background

The gas stove is a kitchen appliance for heating and cooking food and is generally applied to the life of people. The combustor is the core part in the gas-cooker, and the ejector is required to mix gas and air and draw when the combustor uses, and the ejector of current gas-cooker draws and penetrates the gas mixing effect relatively poor however.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an ejector, furnace end, combustor and gas-cooker to alleviate the ejector and draw and penetrate the relatively poor technical problem of gas mixing effect.

In a first aspect, an embodiment provides an ejector, which includes a first ejector pipe and a pressure relief piece, wherein a pressure relief groove is formed in the pressure relief piece, the first ejector pipe includes a diffusion pipe, a conical diffusion channel is formed in the diffusion pipe, an air outlet end of the diffusion pipe is fixedly connected to the pressure relief piece, the diffusion channel is communicated with the pressure relief groove, and the communication position is located at the bottom of the pressure relief groove;

the diffusion channel extends towards the pressure relief groove along a generatrix to obtain an extension cavity, and the part of the extension cavity, which is positioned in the pressure relief groove, is completely accommodated in the pressure relief groove.

In an alternative embodiment, a first insertion boss is arranged at the notch end of the pressure relief groove; the first inserting boss is used for being inserted into a furnace head seat of the furnace end.

In an alternative embodiment, the first insertion boss surrounds the notch of the pressure relief groove.

In an optional embodiment, a cover plate is plugged at the air inlet end of the first injection pipe, the cover plate is provided with a first through air hole and a second through air hole, the first through air hole is used for gas to enter, and the second through air hole is used for air to enter.

In an optional embodiment, a first positioning column is arranged at the air inlet end of the first injection pipe, a first positioning hole is formed in the cover plate, and the first positioning column is inserted into the first positioning hole in a matching mode.

In an optional embodiment, the ejector further comprises a second ejector pipe, and the second ejector pipe is fixedly connected with the pressure relief piece.

In an optional embodiment, a second inserting boss is arranged on the end face of the air inlet end of the second injection pipe; the second inserting boss is used for being inserted into a furnace head seat of the furnace end.

In an optional embodiment, a connecting arm is connected between the first injection pipe and the second injection pipe, a second positioning column is arranged on the connecting arm, and the second positioning column is used for being connected with a bottom shell of the stove.

In a second aspect, an embodiment provides a furnace end, which includes a furnace end seat and the ejector of any one of the foregoing embodiments, wherein a gas mixing cavity is arranged in the furnace end seat, and a gas inlet of the gas mixing cavity is in matching communication with a notch of a pressure relief groove of the ejector.

In an optional embodiment, the stove head base is provided with a fixed arm, the fixed arm is provided with a third positioning column, and the third positioning column is used for being connected with a bottom shell of the stove.

In a third aspect, an embodiment provides a burner, including the furnace end in the foregoing embodiment.

In a fourth aspect, an embodiment provides a gas stove, including the burner described in the foregoing embodiment.

The utility model discloses the beneficial effect of ejector, furnace end, combustor and gas-cooker includes:

the utility model provides an ejector, furnace end, combustor and gas-cooker, wherein, the ejector includes the first ejector pipe that is used for carrying out mixed injection treatment to gas and air and can increase the ejector exit area in order to improve gas and air mixing sufficiency's pressure release spare; the burner comprises the ejector for ejecting and premixing the fuel gas and the air and a burner base for mixing the premixed fuel gas and the air again; wherein, the burner comprises the furnace end; the gas stove comprises the burner.

During the use, the nozzle and the outside air feeder intercommunication of combustor, the nozzle corresponds with the inlet end that first penetrates the pipe, the nozzle spouts the gas into first penetrating the pipe, the process that the gas flows into first penetrating the pipe at a high speed also is drawn into first penetrating the pipe with outside air, gas and air mix in diffusion channel and step up, flow into the pressure release groove afterwards and enter the gas mixing chamber of furnace base, gas and air flow to the export that mixes the gas chamber after further mixing in pressure release groove and the gas mixing chamber, and then the burning heats the pan. The diffusion channel of the diffusion pipe extends towards the pressure relief groove along the generatrix to form an extension cavity, and the part of the extension cavity, which is positioned in the pressure relief groove, is completely accommodated in the pressure relief groove, namely, for an ejector with a certain length, compared with the existing conical diffusion channel, the arrangement of the pressure relief groove can shorten the length of the diffusion channel, so that the first ejector pipe completes ejection in advance and premixing of fuel gas and air; simultaneously, the volume of pressure relief groove will be greater than the volume of the diffusion passageway of current ejector in the department that corresponds the position to enlarge the diffuser volume of ejector, the gas mixture volume that flows into the pressure relief groove further expands, and the gas and the corresponding further improvement of the mixing sufficiency of air improve the penetrating gas mixing effect of ejector.

In addition, to the furnace end that uses this ejector, the mixed gas chamber intercommunication of pressure release groove and furnace base forms the gas mixing chamber jointly, the volume and the notch area of pressure release groove all are greater than prior art diffusion channel's volume and gas outlet area, and the air inlet of gas mixing chamber matches the intercommunication with the notch of pressure release groove, then the air inlet area of gas mixing chamber is also great, correspondingly, the volume of gas mixing chamber also increases to some extent, and simultaneously, pressure release groove and gas mixing chamber form the gas mixing chamber jointly, the volume of gas mixing chamber further increases, gas and air can further intensive mixing in the gas mixing chamber, further improve the mixfulness of both, thereby improve the gas mixing sufficiency of furnace end, and the combustion thermal efficiency of combustor. The gas stove has all the advantages of the burner, and the description is omitted.

Drawings

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

Fig. 1 is a schematic structural view of a first viewing angle of a furnace end provided in an embodiment of the present invention;

fig. 2 is a schematic structural view of a second viewing angle of the furnace end provided in the embodiment of the present invention;

FIG. 3 is an exploded view of the burner of FIG. 2;

fig. 4 is a schematic structural diagram of an injector provided by the embodiment of the present invention.

Icon: 100-furnace end; 200-an ejector; 210-a first ejector tube; 211-a diffuser tube; 212-a first positioning post; 213-first positioning groove; 220-a bleeder; 221-a pressure relief groove; 222-a first connection ear; 223-a first plug boss; 230-a first cover plate; 231-a first vent; 232-a second vent; 233-a first positioning hole; 234-a first positioning boss; 235-a second cover plate; 236-a third vent; 237-a fourth vent; 238-a second positioning hole; 239-a second positioning boss; 240-a second ejector tube; 241-a second plug boss; 242-fourth location post; 243-a second positioning groove; 250-a linker arm; 251-a second positioning column; 252 — a first connection hole; 300-a burner base; 310-outer ring air mixing cavity; 320-inner ring air mixing cavity; 330-a fixed arm; 331-a third positioning column; 332-second connection hole; 340-a second engaging lug; 350-a connector; 360-thermocouple fixing seats; 370-an ignition needle holder; 380-third engaging lug.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the utility model is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to be referred must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The present embodiment provides an injector 200, as shown in fig. 4, including a first injection pipe 210 and a pressure relief part 220, a pressure relief groove 221 is formed in the pressure relief part 220, the first injection pipe 210 includes a diffusion pipe 211, a conical diffusion channel is formed in the diffusion pipe 211, an air outlet end of the diffusion pipe 211 is fixedly connected to the pressure relief part 220, the diffusion channel is communicated with the pressure relief groove 221, and the communication position is located at a groove bottom of the pressure relief groove 221; the diffusion channel extends along its generatrix towards the pressure relief groove 221 to obtain an extension cavity, and the part of the extension cavity located inside the pressure relief groove 221 is completely accommodated inside the pressure relief groove 221.

The embodiment further provides a burner 100, as shown in fig. 1 to fig. 3, which includes a burner base 300 and the injector 200, wherein a gas mixing cavity is provided in the burner base 300, and an air inlet of the gas mixing cavity is in matching communication with a notch of the pressure relief groove 221 of the injector 200.

The present embodiment further provides a burner, including the burner 100.

The embodiment also provides a gas stove which comprises the burner.

The ejector 200, the burner 100, the burner and the gas stove provided by the embodiment, wherein the ejector 200 comprises a first ejector pipe 210 for performing mixed ejection treatment on gas and air and a pressure relief piece 220 capable of increasing the outlet area of the ejector 200 to improve the sufficiency of mixing of the gas and the air; the burner 100 comprises the ejector 200 for ejecting and premixing the gas and the air and a burner base 300 for mixing the premixed gas and the air again; wherein, the burner includes the above furnace end 100; the gas stove comprises the burner.

During the use, the nozzle and the outside air feeder intercommunication of combustor, the nozzle corresponds with the inlet end that first draws penetrating pipe 210, the nozzle spouts the gas into first penetrating pipe 210, the process that the gas flows into first penetrating pipe 210 at a high speed is drawn into first penetrating pipe 210 with outside air also, gas and air mix in the diffusion channel and step up, flow into pressure release groove 221 and enter into the gas mixing intracavity of furnace head seat 300 afterwards, gas and air flow to the export in gas mixing chamber after further mixing in pressure release groove 221 and the gas mixing intracavity, and then the burning heats the pan. Because the diffusion channel of the diffusion pipe 211 extends towards the pressure relief groove 221 along the generatrix to form an extension cavity, and the part of the extension cavity located in the pressure relief groove 221 is completely accommodated in the pressure relief groove 221, that is, for the ejector 200 with a certain length, compared with the existing conical diffusion channel, the arrangement of the pressure relief groove 221 can shorten the length of the diffusion channel, so that the first ejector pipe 210 completes ejection and premixing of gas and air in advance; meanwhile, the volume of the pressure relief groove 221 is larger than the volume of a diffusion channel of the existing ejector 200 at a corresponding position, so that the diffusion volume of the ejector 200 is enlarged, the volume of mixed gas flowing into the pressure relief groove 221 is further expanded, the mixing sufficiency of gas and air is correspondingly further improved, and the ejection gas mixing effect of the ejector 200 is improved.

In addition, for the burner 100 using the injector 200, the pressure relief groove 221 and the gas mixing cavity of the burner head base 300 are communicated to form a gas mixing chamber together, the volume and the notch area of the pressure relief groove 221 are both larger than those of the diffusion channel in the prior art, and the gas inlet of the gas mixing chamber is communicated with the notch of the pressure relief groove 221 in a matching manner, so that the area of the gas inlet of the gas mixing chamber is also larger, correspondingly, the volume of the gas mixing chamber is also increased, meanwhile, the pressure relief groove 221 and the gas mixing chamber form the gas mixing chamber together, and the volume of the gas mixing chamber is further increased, so that the mixing time of gas and air in the gas mixing chamber is prolonged, the mixing sufficiency of the gas and the air is further improved, and the combustion heat efficiency of the combustor is improved. The gas stove has all the advantages of the burner, and the description is omitted.

Optionally, in this embodiment, as shown in fig. 1 to 4, the injector 200 may further include a second injection pipe 240, and the second injection pipe 240 is fixedly connected to the pressure relief element 220. The injector 200 includes two injection pipes, and correspondingly, the number of the gas mixing cavities of the burner head base 300 is two, one of the gas mixing cavities is an outer ring gas mixing cavity 310, and the other gas mixing cavity is an inner ring gas mixing cavity 320 arranged in a ring of the outer ring gas mixing cavity 310, wherein the outer ring gas mixing cavity 310 is matched with an outer ring fire cover of the burner, and the inner ring gas mixing cavity 320 is matched with an inner ring fire cover of the burner; alternatively, the pressure relief groove 221 of the injector 200 may communicate with the outer annular air mixing chamber 310 of the burner head base 300, and the air outlet end of the second injector pipe 240 communicates with the inner annular air mixing chamber 320. During the use, first ejector pipe 210 is to outer ring air mixing chamber 310 air feed, and second ejector pipe 240 is inner ring air mixing chamber 320 air feed, and two ejector pipes draw to penetrate the gas mixing effect and need be higher than single ejector pipe and draw to penetrate the gas mixing effect that is outer ring air mixing chamber 310 and inner ring air mixing chamber 320 air feed simultaneously to improve the gas and the mixing sufficiency of air in the combustor, improve its combustion efficiency.

It should be noted that, in addition to the above form, the pressure relief groove 221 may also communicate with the inner annular air mixing chamber 320, and the second ejector pipe 240 communicates with the outer annular air mixing chamber 310.

In this embodiment, as shown in fig. 4, the notch end of the pressure relief groove 221 may be provided with a first insertion boss 223; the first insertion boss 223 is used for being inserted into the burner base 300 of the burner. When the pressure relief groove 221 is connected with the burner base 300, the first insertion boss 223 is inserted into the air inlet of the outer ring air mixing cavity 310 in a matching manner, so that the position accuracy and connection sealing performance of the pressure relief groove 221 and the outer ring air mixing cavity 310 are improved, the poor accuracy of the end face contact connection position of the pressure relief groove 221 and the outer ring air mixing cavity 310 is reduced, and the gas leakage condition caused by the formation of a gap is easily caused; similarly, the end face of the air inlet end of the second ejector pipe 240 may also be provided with a second insertion boss 241; the second insertion boss 241 is used for being inserted into the burner head base 300 of the burner. When the second injection pipe 240 is connected with the inner ring air mixing cavity 320, the second injection boss 241 is inserted into the air inlet of the inner ring air mixing cavity 320, so that the position accuracy and the connection sealing performance of the connection between the second injection pipe 240 and the inner ring air mixing cavity 320 are improved. Specifically, the fitting tolerance of the first insertion boss 223 with the air mixing chamber may be 0.01 mm.

Optionally, the notch of the pressure relief groove 221 is coplanar with the air outlet of the second ejector pipe 240, and the outer air mixing cavity 310 is coplanar with the air inlet of the inner air mixing cavity 320; the periphery that the pressure relief groove 221 is close to the notch can set up first engaging lug 222, correspondingly, the periphery that the gas mixing chamber is close to the air inlet can set up second engaging lug 340, pressure relief groove 221 and outer loop gas mixing chamber 310 plug-in connection, first ejector tube 210 and inner loop gas mixing chamber 320 plug-in connection back, use connecting piece 350 to carry out fixed connection to the first engaging lug 222 and the second engaging lug 340 that the position corresponds to further improve ejector 200 and stove headstock 300's fastness of being connected.

Specifically, the connecting member 350 may be a bolt, through holes may be formed in the first connecting lug 222 and the second connecting lug 340, and the bolt is screwed into the bolt by using a nut after sequentially passing through the two through holes; or, the connecting member 350 may also be a screw, such as an M4 × 12 cross-slot screw, one of the through holes of the first engaging lug and the second engaging lug is a unthreaded hole, and the other is a threaded hole, and the screw is screwed into the threaded hole after passing through the unthreaded hole. Preferably, a spring washer may be provided between the connection member 350 and the coupling lug.

As shown in fig. 4, in the present embodiment, the first insertion boss 223 surrounds the notch of the pressure relief groove 221. Here is a specific form of the first insertion boss 223, the first insertion boss 223 is annularly surrounded along the notch of the pressure relief groove 221, and when the first insertion boss 223 is inserted into the air inlet of the outer ring air mixing chamber 310, the outer side wall of the first insertion boss 223 is inserted into the inner side wall of the outer ring air mixing chamber 310 in a matching manner, so that the connection position precision and the connection sealing property of the pressure relief groove 221 and the outer ring air mixing chamber 310 are further improved. In addition to the above form, the first insertion boss 223 may also be a plurality of bosses arranged at intervals in the axial direction of the notch of the pressure relief groove 221. Similarly, the second insertion boss 241 may be disposed around the air outlet of the second injection pipe 240.

Besides the above forms, the pressure relief element 220 and the burner base 300 can also be connected through silicone sealing.

In this embodiment, as shown in fig. 2 and fig. 3, the air inlet end of the first injection pipe 210 may be plugged with a cover plate, the cover plate is provided with a first through hole 231 and a second through hole 232, the first through hole 231 is used for gas to enter, and the second through hole 232 is used for air to enter. The cover plate plugs the air inlet end of the first injection pipe 210, wherein the first vent hole 231 corresponds to the nozzle, and the fuel gas sprayed from the nozzle enters the first injection pipe 210 through the first vent hole 231; in the injection process, air enters the first injection pipe 210 through the second vent hole 232 and then is mixed with fuel gas in the first injection pipe. The setting of apron can form the shutoff to the air inlet end of first induction pipe 210, and the area of admitting air through first air vent 231 of control and second air vent 232 is controlled the air input of gas and air for the proportion of the gas that gets into in the first induction pipe 210 and air reaches a better value, in order to ensure gas combustion's sufficiency, and then improves the combustion efficiency of combustor.

In this embodiment, as shown in fig. 2 and fig. 3, the air inlet end of the first injection pipe 210 may be provided with a first positioning column 212, the cover plate is provided with a first positioning hole 233, and the first positioning column 212 is inserted into the first positioning hole 233 in a matching manner. When the cover plate is installed, the first positioning column 212 can limit the installation position of the cover plate, so that the accuracy of the connection position of the cover plate and the first injection pipe 210 is improved, and the corresponding degree of the first air vent 231 on the cover plate and the nozzle is further improved. In addition, the air inlet end of the first ejector pipe 210 can be further provided with a first positioning groove 213, correspondingly, the cover plate is provided with a first positioning boss 234 matched with the first positioning groove 213, when the cover plate is installed, the first positioning boss 234 is inserted into the first positioning groove 213, and the first positioning groove 213 carries out secondary limiting on the installation position of the cover plate so as to further improve the installation precision of the cover plate; preferably, the first positioning groove 213 and the first positioning column 212 may be located at opposite positions of the air inlet end of the first ejector pipe 210; and the cover plate can be detachably connected with the air inlet end of the first injection pipe 210 by a screw, specifically, an M3 × 8 countersunk head screw can be selected.

Specifically, in the case that the ejector 200 includes two ejector pipes, two cover plates may be provided, wherein the cover plate provided at the air inlet end of the first ejector pipe 210 is a first cover plate 230, and the first vent hole 231, the second vent hole 232 and the first positioning boss 234 are provided in the first cover plate 230; a second cover plate 235 is arranged at the air inlet end of the second injection pipe 240, and the second cover plate 235 is provided with a third vent hole 236 for gas to enter and a fourth vent hole 237 for air to enter; the air inlet end of the second injection pipe 240 is provided with a fourth positioning column 242 and a second positioning groove 243, and the second cover plate 235 is provided with a second positioning hole 238 matched with the fourth positioning column 242 and a second positioning boss 239 matched with the second positioning groove 243.

In this embodiment, as shown in fig. 1, a connecting arm 250 may be connected between the first injection pipe 210 and the second injection pipe 240, the connecting arm 250 is provided with a second positioning column 251, and the second positioning column 251 is used for being connected with a bottom shell of the cooker. On one hand, the connecting arm 250 can enhance the connection firmness between the first injection pipe 210 and the second injection pipe 240; on the other hand, during the use, the connecting arm 250 can be connected with the drain pan of cooking utensils, fixes ejector 200 to second reference column 251 can be pegged graft with the mounted position to ejector 200 with the locating hole or the constant head tank cooperation of drain pan and carry out spacingly, thereby improves ejector 200's mounted position precision. Specifically, a first connection hole 252 may be provided on the connection arm 250, the first connection hole 252 being for connection with the bottom case.

Optionally, in this embodiment, the stove head base 300 may be provided with a fixing arm 330, the fixing arm 330 is provided with a third positioning column 331, and the third positioning column 331 is used for being connected with a bottom shell of the stove. During installation, the fixing arm 330 may be connected with a bottom case of the kitchen range to fix the installation position of the stove head base 300, and the third positioning column 331 may be inserted into a positioning hole or a positioning groove of the bottom case in a matching manner to limit the installation position of the stove head base 300, so as to improve the accuracy of the installation position of the stove head base 300. Specifically, a second connection hole 332 may be provided on the fixing arm 330, the second connection hole 332 being used to connect with the bottom case.

Specifically, the first injection pipe 210, the second injection pipe 240 and the pressure relief piece 220 of the injector 200 may be integrally cast, and cast by using the second positioning column 251 as a reference; each component of the burner head base 300 may also be integrally cast, and the third positioning column 331 is used as a reference during casting. During installation, the second positioning column 251 and the third positioning column 331 are both matched and positioned with the bottom shell, and the relative position between the second positioning column 251 and the third positioning column 331 is fixed, so that the relative position accuracy of the ejector 200 and the burner base 300 is improved, and the matching degree of the ejector 200 and the burner base is improved.

Optionally, a thermocouple fixing seat 360 for fixing a thermocouple, an ignition needle fixing seat 370 for fixing an ignition needle, and a third connecting lug 380 for fixing a water tray may be further disposed on the burner base 300.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims (12)

1. The ejector is characterized by comprising a first ejector pipe (210) and a pressure relief piece (220), wherein a pressure relief groove (221) is formed in the pressure relief piece (220), the first ejector pipe (210) comprises a diffusion pipe (211), a tapered diffusion channel is formed in the diffusion pipe (211), the air outlet end of the diffusion pipe (211) is fixedly connected to the pressure relief piece (220), the diffusion channel is communicated with the pressure relief groove (221), and the communication position of the diffusion channel is located at the groove bottom of the pressure relief groove (221);

the diffusion channel extends towards the pressure relief groove (221) along the generatrix of the diffusion channel to obtain an extension cavity, and the part of the extension cavity, which is positioned in the pressure relief groove (221), is completely accommodated in the pressure relief groove (221).

2. The ejector according to claim 1, wherein the notch end of the pressure relief groove (221) is provided with a first insertion boss (223); the first inserting boss (223) is used for being inserted into a furnace head seat (300) of the furnace end.

3. The injector as claimed in claim 2, wherein the first plug-in projection (223) surrounds a slot opening of the pressure relief groove (221).

4. The ejector according to any one of claims 1 to 3, wherein the air inlet end of the first ejector pipe (210) is blocked by a cover plate, the cover plate is provided with a first through vent hole (231) and a second through vent hole (232), the first through vent hole (231) is used for allowing fuel gas to enter, and the second through vent hole (232) is used for allowing air to enter.

5. The ejector according to claim 4, wherein a first positioning column (212) is arranged at the air inlet end of the first ejector pipe (210), the cover plate is provided with a first positioning hole (233), and the first positioning column (212) is matched and inserted in the first positioning hole (233).

6. The injector as claimed in any one of claims 1 to 3, wherein the injector (200) further comprises a second injector tube (240), the second injector tube (240) being fixedly connected to the pressure relief member (220).

7. The ejector according to claim 6, wherein the second ejector pipe (240) is provided with a second insertion boss (241) on the end face of the air inlet end; the second inserting boss (241) is used for being inserted into a furnace head seat (300) of the furnace end.

8. The injector according to claim 6, wherein a connecting arm (250) is connected between the first injection pipe (210) and the second injection pipe (240), the connecting arm (250) is provided with a second positioning column (251), and the second positioning column (251) is used for being connected with a bottom shell of a kitchen range.

9. A burner, characterized in that the burner comprises a burner base (300) and the ejector (200) of any one of claims 1 to 8, wherein a gas mixing cavity is arranged in the burner base (300), and a gas inlet of the gas mixing cavity is in matched communication with a notch of the pressure relief groove (221) of the ejector (200).

10. The burner according to claim 9, characterized in that the burner base (300) is provided with a fixing arm (330), the fixing arm (330) is provided with a third positioning column (331), and the third positioning column (331) is used for connecting with a bottom shell of the cooker.

11. A burner, characterized in that it comprises a burner (100) according to claim 9 or 10.

12. A gas range comprising the burner of claim 11.

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