CN219083070U - Ejector and combustor using same - Google Patents

Abstract

The utility model relates to an ejector and a burner using the ejector, which comprises an ejector body, wherein the ejector body is divided into a contraction part, a first mixing part and a diffusion part along the airflow direction according to the change of the cross section, and the ejector is arranged at the air inlet end facing the contraction part, and is characterized in that: the utility model also comprises a sleeve sleeved outside the ejector body, wherein the sleeve comprises a first end connected with the contraction part of the ejector body and a second end connected with the diffusion part of the ejector body, a second mixing part for fuel gas and/or primary air is formed between the sleeve and the ejector body, the first end of the sleeve is provided with a first injection port for injecting the fuel gas and/or primary air, and the second end of the sleeve is provided with a second injection port for injecting the fuel gas and/or primary air, compared with the prior art, the utility model has the advantages that: the utility model provides an ejector, still provided the combustor that uses this ejector, this combustor is difficult to from the flame when burning, flame stabilization when burning.

Description

Ejector and combustor using same

Technical Field

The utility model relates to the technical field of household kitchen ware, in particular to an ejector and a burner using the ejector.

Background

At present, two types of gas burners are mainly used on kitchen ware, one type of gas burners is an injection type gas burner, the gas burner generally comprises a fire cover, an injection pipe and a spray head, one end of the injection pipe corresponding to the spray head is provided with a first air inlet, the injector can also be called as an injection pipe, the injection pipe is communicated with the outside air through the first air inlet, gas is injected into the injection pipe from the spray head at a high speed, strong injection is formed in the injection pipe, and outside air is sucked into the injection pipe from an air inlet and is mixed with the gas in the injection pipe and then is sent to the fire cover for combustion. The burner has the advantages that: the structure is simple and compact, the primary air injection effect is good, but the primary air injection effect is also insufficient, and the requirement on the air supply pressure of the fuel gas is high; the fuel gas is sprayed out from the nozzle with smaller aperture, the jet flow enters the injection pipe at a high speed, and the surrounding part of air is sucked into the injection pipe under the turbulent diffusion action of the jet flow; in addition, in order to avoid the problem of yellow flame of the burner using the above-mentioned injector, for example, chinese patent No. ZL202020183824.3 (issued to the public No. CN 212252607U) discloses a single-cavity burner structure and stove, which is connected to the injection pipe at the air inlet end of the air mixing cavity, a sleeve is sleeved outside the injection pipe, at least one air inlet is provided at the position of the injection pipe, and a nozzle is provided at the opening at the lower end of the sleeve, and the air is introduced at the bottom end of the sleeve by using the sleeve, so that the air amount of the mixed gas is increased, the gas can be combusted sufficiently, and the combustion efficiency is improved, but only one injection source for injecting the gas is needed in the injection pipe, so that the strength of the external air sucked from the air inlet needs to be improved, and therefore, it is necessary to design an injector with strong mixing capability.

Disclosure of Invention

The first technical problem to be solved by the present utility model is to provide an ejector with strong mixing capability, which aims at the state of the art.

The second technical problem to be solved by the present utility model is to provide a burner which uses the ejector and burns fully against the state of the art.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: the ejector comprises an ejector body, wherein the ejector body is divided into a shrinkage part, a first mixing part and a diffusion part along the airflow direction according to the change of the cross section, and an ejector is arranged towards the air inlet end of the shrinkage part, and is characterized in that: the device comprises an ejector body, and is characterized by further comprising a sleeve sleeved outside the ejector body, wherein the sleeve comprises a first end connected with the shrinkage part of the ejector body and a second end connected with the diffusion part of the ejector body, a second mixing part for fuel gas and/or primary air is formed between the sleeve and the ejector body, the first end of the sleeve is provided with a first injection port for injecting the fuel gas and/or primary air, and the second end of the sleeve is provided with a second injection port for injecting the fuel gas and/or primary air.

Since the connection wall is provided such that the fuel gas and/or the primary air can be ejected in a uniform manner directly along the ejection direction of the diffuser portion, preferably, the second end of the sleeve is connected to the diffuser portion of the ejector body by the connection wall, and the second ejection opening is provided on the connection wall. The injection direction of the second injection port is consistent with the injection direction of the diffusion part, so that the mixing degree of the fuel gas and the primary air in the same direction can be increased, in addition, the sleeve is arranged in parallel along the axial direction of the injector body, therefore, the second mixing part is provided with a diffusion section and a contraction section corresponding to the diffusion section corresponding to the contraction part according to the change of the cross section of the injector body, when the fuel gas and/or the primary air are injected into the first injection port, the fuel gas and/or the primary air can be rapidly diffused and flow to the contraction section, the mixing can be effectively and uniformly accelerated, and when the fuel gas and/or the primary air are injected from the second injection port, the fuel gas and/or the primary air flowing out of the diffusion part in the injector body can be mixed again, so that the speed and the mixing degree of the injector body for injecting the fuel gas and/or the primary air are improved, and the intensity of the outside primary air is also greatly improved.

Further, a third jet orifice for jetting the fuel gas and/or primary air in the second mixing part is formed in the diffusion part of the ejector body, and the third jet orifice is located at the upstream of the second jet orifice. Because the third jet orifice is positioned at the upstream of the second jet orifice, when the fuel gas and/or primary air are uniformly mixed with the fuel gas and/or primary air flowing out of the second mixing part after passing through the three sections of the contraction part, the first mixing part and the diffusion part in the jet pipe body, the fuel gas and/or primary air can be uniformly mixed and accelerated effectively when flowing to the contraction part of the second mixing part, the speed is higher when the fuel gas and/or primary air is jetted from the second jet orifice, and the fuel gas and/or primary air flowing out of the diffusion part in the jet pipe body after being mixed with the fuel gas and/or primary air in the first step can be mixed for the second time again, so that the mixing effect can be better.

In order to solve the second technical problem, preferably, a burner is provided, which comprises a gas channel and a fire cover arranged on the gas channel, wherein an air inlet of the gas channel is connected with an ejector, and the burner is characterized in that: the ejector is the ejector defined above.

Further, the fire cover comprises a fire cover lower body and a fire cover upper body covering the fire cover lower body, radial main fire grooves are formed in the lower surface of the annular peripheral wall of the fire cover upper body at intervals along the circumferential direction, the main fire grooves and the fire cover lower body are matched to form a main fire channel, and the main fire channel is communicated with the fuel gas channel. Each main fire channel is uniformly arranged, so that gas is combusted uniformly, flame is not easy to leave during combustion, and a fire cover adopts a split design of a fire cover upper body and a fire cover lower body, so that when foreign matters enter the main fire channel, the main fire channel can be cleaned only by disassembling and cleaning, and the cleaning can be ensured.

Further, spacer blocks are arranged between the adjacent main fire grooves, flame stabilizing grooves are formed in the upper surfaces of the spacer blocks from inside to outside, and the flame stabilizing grooves are matched with the lower body of the fire cover to form flame stabilizing channels. Each flame stabilizing channel can play the throttle, effectively reduce the gas outflow speed of main fire channel, make flame steady burning near main fire channel, effectively heat main fire channel, play good steady flame effect, steady flame channel both ends can both pull the main fire of main fire channel simultaneously for gas combustion is even, is difficult for leaving the flame during the burning, and steady flame effect is further.

In order to further reduce the outflow speed of the fuel gas for the flame holding groove, it is preferable that the flame holding groove is a flared section at a position adjacent to the outer end.

Further, the lower fire cover body gradually inclines upwards from inside to outside, a convex ring protruding out of the surface of the lower fire cover body is arranged at a position, adjacent to the outer end, of the lower fire cover body and corresponding to the flaring section of the main fire groove, the flaring section of the main fire groove is separated into an outflow channel which is located on the outer side and communicated with the flaring section by the convex ring, and the outflow channel is narrower than the flaring section. The arrangement of the raised ring makes the fuel gas for stabilizing flame turn in the flame stabilizing channel, so that the fuel gas outflow speed is reduced, and the outflow channel is narrower than the flaring section, so that the fuel gas for flowing out of the flame stabilizing groove is not easy to leave flame during combustion, the fuel gas root of the main flame channel is heated, and the flame of the whole burner is stable during combustion.

In order to form the mixing chamber of the fire cover, preferably, the upper fire cover body is annular, the annular peripheral wall of the upper fire cover body and the inner annular wall extending vertically or obliquely downwards from the inner side edge of the annular peripheral wall, the inner annular wall, the annular peripheral wall and the lower fire cover body jointly enclose a mixing chamber, and the mixing chamber is communicated with the fuel gas channel.

In order to facilitate the connection of the gas channel with the lower body of the fire cover, it is preferable from the viewpoint of structural realization that the gas channel is defined on a base, an opening communicating with the ejector is opened on the base, and a connecting piece for connecting the lower body of the fire cover is provided on the base.

In order to achieve communication between the connecting piece and the mixing chamber and between the connecting piece and the gas channel, the connecting piece is preferably annular, and the connecting piece is provided with a communication port communicated with the mixing chamber and the gas channel.

Compared with the prior art, the utility model has the advantages that: the ejector is provided, gas and/or primary air can be rapidly diffused when being ejected into the first ejection port, and the gas and/or primary air can be mixed with the gas and/or primary air flowing out of the diffusion part in the ejector body again when being ejected from the second ejection port, so that the speed and the mixing degree of the gas and/or primary air ejected by the ejector body are improved, and the ejector is provided with two ejection sources as a whole, so that the intensity of sucking the external primary air is greatly improved; the burner with the ejector is not easy to separate flame during combustion, and the flame is stable during combustion.

Drawings

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

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

FIG. 3 is a cross-sectional view of a burner in an embodiment of the utility model;

FIG. 4 is a schematic view of the structure of the upper body of the fire cover according to the embodiment of the utility model;

FIG. 5 is a schematic structural view of a connecting member according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of a lower body of a fire cover according to an embodiment of the present utility model.

Detailed Description

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

As shown in fig. 1 to 6, is a preferred embodiment of the present utility model. The ejector of this embodiment includes ejector body 1, this ejector body 1 divide into constriction 11, first mixed portion 12 and diffusion portion 13 along the change of air current direction according to the cross section, and be provided with sprayer 8 towards the income gas port end of constriction 11, still include the cover pipe 2 of cover outside ejector body 1, sleeve pipe 2 is including the first end 21 that is connected with constriction 11 of ejector body 1 and the second end 22 that is connected with diffusion portion 13 of ejector body 1, be formed with the second mixed portion 23 of gas and/or primary air between sleeve pipe 2 and the ejector body 1, sleeve pipe 2's first end 21 then has the first jet orifice 211 that supplies gas and/or primary air injection, and sleeve pipe 2's second end 22 has offered the second jet orifice 221 that supplies gas and/or primary air injection. The arrangement of the sleeve 2 enables the fuel gas and/or primary air to be rapidly diffused when being injected into the first injection port 211, and the fuel gas and/or primary air can be mixed with the fuel gas and/or primary air flowing out of the diffusion part 13 in the injector body 1 again when being injected from the second injection port 221, so that the speed and the mixing degree of the injector body 1 for injecting the fuel gas and/or primary air are improved, and the intensity of the outside primary air is greatly improved due to the fact that the injector is integrally provided with two injection sources.

The second end 22 of the sleeve 2 is connected with the diffusion portion 13 of the ejector body 1 through the connecting wall 24, the second injection port 221 is arranged on the connecting wall 24, fuel gas and/or primary air can be directly injected along the injection direction of the diffusion portion 13 due to the arrangement of the connecting wall 24, the fuel gas and/or primary air can be uniformly injected along the injection direction of the diffusion portion 13 due to the fact that the injection direction of the second injection port 221 is consistent with the injection direction of the diffusion portion 13, the mixing degree of the fuel gas and/or primary air in the same direction can be increased, in addition, the sleeve 2 is arranged in parallel along the axis direction of the ejector body 1, the second mixing portion 23 corresponds to the ejector body 1, according to the change of the cross section, the diffusion section corresponds to the contraction portion 11 and the contraction section corresponds to the diffusion portion 13 respectively, when the fuel gas and/or primary air is injected into the first injection port 211, the fuel gas and/primary air can be rapidly diffused and flows into the contraction section to be effectively mixed and accelerated, and when the fuel gas and/primary air which flows out of the diffusion portion 13 in the ejector body 1 are sprayed from the second injection port 221 is relatively fast, the mixing degree of the fuel gas and/primary air which flows out of the diffusion portion 13 can be mixed again, on the one hand, the ejector body 1 and the two ejector body have high overall injection strength, and the two external injection strength can be greatly improved.

And the diffuser portion 13 of the ejector body 1 is provided with a third injection port 131 for injecting the fuel gas and/or primary air in the second mixing portion 23, the third injection port 131 being located upstream of the second injection port 221. Since the third injection port 131 is located upstream of the second injection port 221, when the fuel gas and/or primary air is uniformly mixed with the fuel gas and/or primary air flowing out of the second mixing portion 23 after passing through the three sections of the constriction 11, the first mixing portion 12 and the diffusion portion 13 in the ejector body 1, the first step of mixing is performed first, and when the fuel gas and/or primary air flows to the constriction of the second mixing portion 23, the mixing can be effectively uniformly accelerated, and the speed is faster when being injected from the second injection port 221, the fuel gas and/or primary air flowing out of the diffusion portion 13 in the ejector body 1 after the first step of mixing can be mixed again for the second time, so that the mixing effect can be better achieved.

The present embodiment also provides a burner using the above-mentioned injector, the burner includes a flame cover 4 disposed on the flame channel 31 and a gas channel 31, the flame cover upper body 42 is annular in order to form a mixing chamber 423 of the flame cover 4, the annular peripheral wall 421 of the flame cover upper body 42 and an inner annular wall 422 extending vertically or obliquely downward from an inner side edge of the annular peripheral wall 421, the inner annular wall 422 and the annular peripheral wall and the flame cover lower body 41 together enclose a mixing chamber 423, the mixing chamber 423 is communicated with the gas channel 31, and for facilitating connection of the gas channel 31 and the flame cover lower body 41, the gas channel 31 is defined on the base 3, an opening communicating with the injector is provided on the base 3, and a connecting piece 7 for connecting the flame cover lower body 41 is provided on the base 3, the connecting piece 7 of the present embodiment is annular in shape, and the connecting piece 7 has a communication port 71 communicating with the mixing chamber 423 and the gas channel 31.

The air inlet of the gas channel 31 is connected with the ejector, the fire cover 4 of the burner comprises a fire cover lower body 41 and a fire cover upper body 42 covering the fire cover lower body, radial main fire grooves 43 are formed on the lower surface of the annular peripheral wall of the fire cover upper body 42 at intervals along the circumferential direction, the main fire grooves 43 and the fire cover lower body 41 are matched to form a main fire channel 5, and the main fire channel 5 is communicated with the gas channel 31. The main fire channels 5 are uniformly arranged, so that the fuel gas is combusted uniformly, flame is not easy to leave during combustion, and the fire cover 4 adopts the split design of the fire cover upper body 42 and the fire cover lower body 41, so that when foreign matters enter the main fire channels 5, the main fire channels are only required to be disassembled and cleaned, and the cleaning can be ensured. And a spacer block 6 is further arranged between the adjacent main fire grooves 43, the upper surface of the spacer block 6 is provided with flame stabilizing grooves 61 from inside to outside, and the flame stabilizing grooves 61 and the fire cover lower body 41 are matched to form flame stabilizing channels. Each flame stabilizing channel can play the throttle, effectively reduce the gas outflow speed of main fire channel 5, make flame steady burning near main fire channel 5, effectively heat main fire channel 5, play good steady flame effect, steady flame channel both ends can both pull the main fire of main fire channel 5 simultaneously for gas combustion is even, is difficult for leaving the flame during the burning, and steady flame effect is further. Of course, to further reduce the outflow velocity of the fuel gas from the flame holding groove 61, the flame holding groove 61 is formed with a flared section 611 at a position adjacent to the outer end.

In addition, the lower fire cover body 41 gradually inclines upwards from inside to outside, a convex ring 410 protruding from the surface of the lower fire cover body 41 is arranged at a position adjacent to the outer end and corresponding to the flaring section 611 of the main fire groove 43, the flaring section 611 of the main fire groove 43 is separated into an outflow channel 411 which is positioned outside and communicated with the flaring section 611 by the convex ring 410, and the outflow channel 411 is narrower than the flaring section 611. The arrangement of the raised ring 410 makes the fuel gas for stabilizing flame turn in the flame stabilizing channel, reduces the fuel gas outflow speed, and the outflow channel 411 is narrower than the flaring section 611, so that the fuel gas for flowing out of the flame stabilizing groove 61 is not easy to leave flame during combustion, and heats the fuel gas root of the main flame channel 5, so that the flame of the whole burner is stable during combustion.

Claims (10)

1. The utility model provides an ejector, is including ejector body (1), ejector body (1) divide into constriction (11), first mixed portion (12) and diffusion (13) according to the change of cross section along the air current direction to towards the income gas port end of constriction (11) be provided with sprayer (8), its characterized in that: the novel fuel injector is characterized by further comprising a sleeve (2) sleeved outside the injector body (1), wherein the sleeve (2) comprises a first end (21) connected with the contraction part (11) of the injector body (1) and a second end (22) connected with the diffusion part (13) of the injector body (1), a second mixing part (23) for fuel gas and/or primary air is formed between the sleeve (2) and the injector body (1), the first end (21) of the sleeve (2) is provided with a first injection port (211) for injecting the fuel gas and/or primary air, and the second end (22) of the sleeve (2) is provided with a second injection port (221) for injecting the fuel gas and/or primary air.

2. The eductor of claim 1 wherein: the second end (22) of the sleeve (2) is connected with the diffusion part (13) of the ejector body (1) through a connecting wall (24), and the second jet orifice (221) is arranged on the connecting wall (24).

3. An ejector according to claim 1 or claim 2, wherein: the diffusion part (13) of the ejector body (1) is provided with a third jet orifice (131) for jetting fuel gas and/or primary air in the second mixing part (23), and the third jet orifice (131) is positioned at the upstream of the second jet orifice (221).

4. The utility model provides a combustor, including with gas passageway (31) and set up fire lid (4) on gas passageway (31), the air inlet of gas passageway (31) links to each other its characterized in that with the injector: the ejector is as defined in any one of the preceding claims 1 to 3.

5. The burner of claim 4, wherein: the fire lid (4) is including fire lid lower part (41) and cover fire lid upper part (42) on it, the lower surface of the annular perisporium of fire lid upper part (42) is along radial main fire recess (43) of circumference interval ground shaping, main fire recess (43) with fire lid lower part (41) cooperation forms main fire passageway (5), main fire passageway (5) are linked together with gas passageway (31).

6. The burner of claim 5, wherein: and a spacer block (6) is arranged between the adjacent main fire grooves (43), flame stabilizing grooves (61) are formed on the upper surfaces of the spacer blocks (6) from inside to outside, and the flame stabilizing grooves (61) and the fire cover lower body (41) are matched to form flame stabilizing channels.

7. The burner of claim 6, wherein: the flame stabilizing groove (61) is a flaring section (611) at a position adjacent to the outer end.

8. The burner of claim 7, wherein: the fire cover lower body (41) gradually inclines upwards from inside to outside, the position of the fire cover lower body (41) adjacent to the outer end and corresponding to the flaring section (611) of the main fire groove (43) is provided with a convex ring (410) protruding out of the surface of the fire cover lower body, the flaring section (611) of the main fire groove (43) is divided into an outflow channel (411) which is positioned at the outer side and communicated with the flaring section (611) by the convex ring (410), and the outflow channel (411) is narrower than the flaring section (611).

9. The burner of claim 8, wherein: the fire cover upper body (42) is annular, an annular peripheral wall (421) of the fire cover upper body (42) and an inner annular wall (422) extending vertically or obliquely downwards from the inner side edge of the annular peripheral wall (421), the inner annular wall (422), the annular peripheral wall and the fire cover lower body (41) jointly enclose a mixing cavity (423), and the mixing cavity (423) is communicated with the fuel gas channel (31).

10. The burner of claim 9, wherein: the fuel gas channel (31) is limited on the base (3), an opening communicated with the ejector is formed in the base (3), and a connecting piece (7) used for connecting the lower fire cover body (41) is arranged on the base (3).

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