CN115899684A - Ejector and combustor using same - Google Patents

Abstract

The invention relates to an ejector and a burner using the same, wherein the burner comprises an ejector body, 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 a cross section, and an ejector is arranged towards the air inlet end of the contraction part, and the burner is characterized in that: the ejector is characterized by further comprising a sleeve which is sleeved outside the ejector body, 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 of 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 jet orifice for injecting the fuel gas and/or the primary air, and the second end of the sleeve is provided with a second jet orifice for injecting the fuel gas and/or the primary air, and compared with the prior art, the ejector has the advantages that: the utility model provides an ejector, still provide the combustor that has this ejector of application, this combustor is difficult to leave flame when burning, and flame is stable during the burning.

Description

Ejector and combustor applying same

Technical Field

The invention relates to the technical field of household kitchenware, in particular to an ejector and a burner using the ejector.

Background

At present, two types of gas burners are mainly used for kitchen utensils, one type of the gas burner is an injection type gas burner and generally comprises a fire cover, an injection pipe and a spray head, a first air inlet is formed in one end, corresponding to the spray head, of the injection pipe, the injection pipe can also be called as an injection pipe, the injection pipe is communicated with the external atmosphere through the first air inlet, gas is sprayed into the injection pipe from the spray head at a high speed, strong injection is formed in the injection pipe, the external air is sucked into the injection pipe from an air inlet, and the gas is mixed with the gas in the injection pipe and then is sent to the fire cover for combustion. The combustor has the advantages that: the structure is simple and compact, the primary air injection effect is good, but the defects exist, and the requirement on the air supply pressure of the fuel gas is high; and because the gas is sprayed out from the nozzle with smaller aperture, the jet flow enters the ejector pipe at a very high speed, and partial air around the jet flow is sucked in an entrainment manner to enter the ejector pipe under the turbulent dispersion action of the jet flow; in addition, in order to avoid the problem of yellow flame in the existing burner with the ejector, for example, in the invention patent of china with patent No. ZL202020183824.3 (with publication No. CN 212252607U), an ejector pipe is connected to the air inlet end of the air mixing chamber, a sleeve is sleeved outside the ejector pipe, at least one air inlet is arranged at the position of the sleeve located at the ejector pipe, and a nozzle is arranged on an opening at the lower end of the sleeve, so that air quantity of mixed gas is increased by feeding air at the bottom end of the sleeve through the sleeve, the gas can be fully combusted, and the combustion efficiency is improved.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide an ejector with strong mixing capability in view of the above-mentioned current state of the art.

The second technical problem to be solved by the present invention is to provide a burner which is applied with the injector and burns fully in view of the above prior art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: this ejector, including the ejector body, the ejector body divide into constriction, first mixing portion and diffusion portion according to the change of cross section along the air current direction to the income gas port end towards the constriction is provided with sprayer, its characterized in that: the ejector comprises an ejector body and is characterized by further comprising a sleeve which is sleeved outside the ejector body, the sleeve comprises a first end connected with a contraction portion of the ejector body and a second end connected with a diffusion portion of the ejector body, a second mixing portion of 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 jet orifice through which the fuel gas and/or the primary air are injected, and the second end of the sleeve is provided with a second jet orifice through which the fuel gas and/or the primary air are injected.

Because the arrangement of the connecting wall enables the fuel gas and/or the primary air to be directly sprayed out uniformly along the spraying direction of the diffusion part, preferably, the second end of the sleeve is connected with the diffusion part of the ejector body through the connecting wall, and the second spraying opening is arranged on the connecting wall. Because the injection direction of the second jet orifice is consistent with the injection direction of the diffusion part, the mixing degree of fuel gas and primary air in the same direction can be increased, in addition, the sleeve pipe is arranged in parallel along the axial direction of the ejector body, therefore, the second mixing part is provided with a diffusion section and a contraction section corresponding to the diffusion part corresponding to the contraction part respectively according to the change of the cross section corresponding to the ejector body, when the fuel gas and/or the primary air are injected into the first jet orifice, the fuel gas and/or the primary air can be rapidly diffused and flow to the contraction section to be effectively mixed and accelerated, and when the fuel gas is injected from the second jet orifice, the speed is high, the fuel gas and/or the primary air flowing out from the ejector body can be mixed again, on one hand, the speed and the mixing degree of the fuel gas and/the primary air injected from the ejector body are improved, on the other hand, the whole ejector is provided with two injection sources, and the suction strength of the external primary air is also greatly improved.

Further, the diffusion part of the ejector body is provided with a third jet orifice for jetting the fuel gas and/or the primary air in the second mixing part, and the third jet orifice is positioned 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 gas and/or the primary air are uniformly mixed in the jet pipe body through the contraction part, the first mixing part and the diffusion part, the gas and/or the primary air flowing out of the second mixing part are firstly mixed, when the gas and/or the primary air flow to the contraction section of the second mixing part, the gas and/or the primary air can be effectively uniformly mixed and accelerated, and when the gas and/or the primary air flow out of the diffusion part through the first mixing part, the gas and/or the primary air can be mixed for the second time when the gas and/or the primary air flow out of the second jet orifice, the gas and/or the primary air can be mixed for the second time, and the mixing effect can be better played.

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 the gas inlet of the gas channel is connected with an ejector, and the burner is characterized in that: the ejector is the ejector defined above.

Furthermore, the fire cover comprises a fire cover lower body and a fire cover upper body covering the fire cover lower body, wherein 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 gas channel. Each main fire channel is uniformly arranged, so that the gas is uniformly combusted, flame is not easy to leave during combustion, and the fire cover adopts the split design of the upper fire cover body and the lower fire cover body, so that when foreign matters enter the main fire channel, the main fire channel can be cleaned only by being disassembled, and the main fire channel is ensured to be clean.

Furthermore, a spacer block is arranged between the adjacent main fire grooves, flame stabilizing grooves are formed on the upper surface of the spacer block from the inside to the outside, and the flame stabilizing grooves are matched with the lower body of the fire cover to form a flame stabilizing channel. Each flame stabilizing channel can play the gas outflow speed of throttle, effectively reduce main fire passageway, makes flame stable near main fire passageway burning, effectively heats main fire passageway, plays good flame stabilizing effect, and the main fire of main fire passageway can both be pulled to flame stabilizing channel both ends simultaneously for the gas combustion is even, is difficult for leaving the flame during burning, and flame stabilizing effect is further.

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

Furthermore, 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 the position, close 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 divided into an outflow channel 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. This setting up of protruding circle makes steady flame take place to turn with gas in steady flame passageway, reduces the gas outflow speed to the outflow passageway is compared the flaring section and is more narrowed, makes the steady flame for recess gas of outflow be difficult to from the flame when the burning, heats main flame path gas root, makes whole combustor flame stable when the burning.

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

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

In order to realize the communication between the connecting piece and the mixing cavity and the fuel gas channel, the connecting piece is preferably in a ring shape and is provided with a communication port communicated with the mixing cavity and the fuel gas channel.

Compared with the prior art, the invention has the advantages that: the ejector has the advantages that fuel gas and/or primary air can be rapidly diffused when being ejected into the first ejection opening, and can be rapidly mixed with the fuel gas and/or the primary air flowing out from the diffusion part in the ejector body when being ejected from the second ejection opening, so that the speed and the mixing degree of the fuel gas and/or the primary air ejected by the ejector body are improved, the ejector is integrally provided with two ejection sources, and the strength of sucking the external primary air is greatly improved; the combustor with the ejector is further provided, the combustor is not prone to flame separation during combustion, and flame is stable during combustion.

Drawings

FIG. 1 is a schematic structural view of an ejector according to an embodiment of the present invention;

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 present invention;

FIG. 4 is a schematic structural diagram of an upper fire cover body according to an embodiment of the present invention;

FIG. 5 is a schematic view of a connector according to an embodiment of the present invention;

FIG. 6 is a schematic view of the structure of the lower body of the fire cover in the embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the following examples of the drawings.

As shown in fig. 1 to 6, the preferred embodiment of the present invention is shown. The ejector of this embodiment includes ejector body 1, this ejector body 1 divide into constriction 11, first mixing portion 12 and diffusion 13 according to the change of cross section along the air current direction, and be provided with ejector 8 towards the entrance end of constriction 11, still including the sleeve pipe 2 of cover outside ejector body 1, sleeve pipe 2 is including the first end 21 of being connected with constriction 11 of ejector body 1 and the second end 22 of being connected with diffusion 13 of ejector body 1, be formed with the second mixing portion 23 of gas and/primary air between sleeve pipe 2 and the ejector body 1, the first end 21 of sleeve pipe 2 then has the first jet orifice 211 that supplies gas and/primary air to spout into, and the second end 22 of sleeve pipe 2 then sets up the second jet orifice 221 that supplies gas and/primary air to spout. Because the setting of sleeve pipe 2 makes gas and/primary air can spread rapidly when spouting into first jet 211 to the speed is very fast when spouting from second jet 221, can mix again with the gas and/primary air that diffuser portion 13 flows in the ejector body 1, has improved the speed and the degree of mixing that the ejector body 1 jetted gas and/primary air on the one hand, and on the other hand the ejector wholly has two jet sources, has also promoted the inspiratory intensity of external primary air greatly.

The second end 22 of the sleeve 2 is connected with the diffusion portion 13 of the injector body 1 through the connecting wall 24, the second injection port 221 is arranged on the connecting wall 24, due to the arrangement of the connecting wall 24, fuel gas and/or primary air can be directly and consistently 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 the primary air in the same direction can be increased, in addition, due to the fact that the sleeve 2 is arranged in parallel along the axial direction of the injector body 1, the second mixing portion 23 corresponds to the injector body 1 according to the change of the cross section and is provided with a diffusion section and a contraction section corresponding to the diffusion portion 13 respectively, when the fuel gas and/or the primary air are injected into the first injection port 211, the fuel gas and/primary air can be rapidly diffused and flow to the contraction section to be effectively accelerated, when the fuel gas and/primary air are injected from the second injection port 221, the mixing speed is high, the fuel gas and the primary air flowing out of the diffusion portion 13 in the injector body 1 can be mixed, on the other hand, the whole injection source can be greatly improved, and the whole injection intensity of the external air can be greatly improved.

And the diffusion part 13 of the ejector body 1 is opened with a third injection port 131 for injecting the fuel gas and/or the primary air in the second mixing part 23, and the third injection port 131 is located at the upstream of the second injection port 221. Because the third injection port 131 is located at the upstream of the second injection port 221, when the gas and/or the primary air is uniformly mixed with the gas and/or the primary air flowing out from the second mixing portion 23 after passing through the three sections of the contraction portion 11, the first mixing portion 12 and the diffusion portion 13 in the ejector pipe body 1, the gas and/or the primary air is firstly mixed in a first step, and when the gas and/or the primary air flows to the contraction section of the second mixing portion 23, the gas and/or the primary air can be effectively mixed and accelerated, and when the gas and/or the primary air is sprayed out from the second injection port 221 at a high speed, the gas and/or the primary air which flows out from the diffusion portion 13 in the ejector pipe body 1 and is mixed in the first step again in a second step, so that the mixing effect can be better achieved.

The present embodiment further provides a burner using the above injector, the burner includes a gas channel 31 and a fire cover 4 disposed on the gas channel 31, in order to form a mixing cavity 423 of the fire cover 4, 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 downward from an 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 together define the mixing cavity 423, the mixing cavity 423 is communicated with the gas channel 31, and in order to facilitate connection of the gas channel 31 and the fire cover lower body 41, the gas channel 31 is defined on the base 3, an opening communicated with the injector is opened on the base 3, and a connecting piece 7 for connecting the fire cover lower body 41 is disposed on the base 3, the connecting piece 7 of the present embodiment is annular, and the connecting piece 7 has a communication port 71 communicated with the mixing cavity 423 and the gas channel 31.

The gas 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, the lower surface of the annular peripheral wall of the fire cover upper body 42 is provided with radial main fire grooves 43 at intervals along the circumferential direction, the main fire grooves 43 are matched with the fire cover lower body 41 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 gas can be uniformly combusted, 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 can be cleaned only by being disassembled and cleaned, and the cleanness is ensured. The spacing blocks 6 are arranged between the adjacent main fire grooves 43, flame stabilizing grooves 61 are formed on the upper surfaces of the spacing blocks 6 from the inside to the outside, and the flame stabilizing grooves 61 are matched with the fire cover lower body 41 to form flame stabilizing channels. Each steady flame passageway can play the throttle, effectively reduce main flame passageway 5's gas outflow speed, makes flame stable near main flame passageway 5 burning, effectively heats main flame passageway 5, plays good steady flame effect, and the main fire of main flame passageway 5 can both be pulled at steady flame passageway both ends simultaneously for the gas combustion is even, is difficult for leaving the flame during burning, and steady flame effect is further. Of course, to further reduce the outflow rate of the gas for the flame holding groove 61, the flame holding groove 61 is a flared section 611 at a portion adjacent to the outer end.

In addition, the fire cover lower body 41 gradually inclines upwards from inside to outside, the fire cover lower body 41 is provided with a convex ring 410 which protrudes out of the surface of the fire cover lower body 41 near the outer end and corresponding to the flaring section 611 of the main fire groove 43, the convex ring 410 divides the flaring section 611 of the main fire groove 43 into an outflow channel 411 which is positioned outside and communicated with the flaring section 611, and the outflow channel 411 is narrower than the flaring section 611. This setting up of protruding circle 410 makes steady flame take place to turn with gas in steady flame passageway, reduces the gas outflow speed to outflow passageway 411 is more narrow than flaring section 611, makes outflow steady flame recess 61 gas be difficult to from the flame when the burning, heats 5 gas roots in main flame path, makes whole combustor flame stable when the burning.

Claims (11)

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

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. The ejector according to claim 1 or 2, wherein: the diffusion part (13) of the ejector body (1) is provided with a third jet orifice (131) for jetting the fuel gas and/or the 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 channel (31) and fire lid (4) of setting on gas channel (31), the air inlet and the ejector of gas channel (31) link to each other its characterized in that: the ejector is as defined in any one of claims 1 to 3.

5. The burner of claim 4, wherein: the fire cover (4) 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 in 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).

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

7. The burner of claim 6, wherein: the flame stabilizing groove (61) is a flaring section (611) at the 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, a convex ring (410) protruding out of the surface of the fire cover lower body (41) is arranged at the position, close to the outer end, of the fire cover lower body (41) and corresponding to the flaring section (611) of the main fire groove (43), the flaring section (611) of the main fire groove (43) is divided into an outflow channel (411) located on the outer side and communicated with the flaring section (611), 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, the annular peripheral wall (421) of the fire cover upper body (42) and an inner annular wall (422) vertically or obliquely extending 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 gas channel (31).

10. The burner of claim 9, wherein: the 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 fire cover lower body (41) is arranged on the base (3).

11. The burner of claim 10, wherein: the connecting piece (7) is annular, and the connecting piece (7) is provided with a communication port (71) communicated with the mixing cavity (423) and the gas channel (31).

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