CN218379400U - Mixed flow device, gas mixing system, combustion system and water heater - Google Patents

Abstract

The utility model provides a mixed flow device, gas mixing system, combustion system and water heater, this mixed flow device includes: the shell surrounds the inner mixed flow cavity, and one end of the shell is provided with a mixed gas inlet suitable for introducing mixed gas into the inner mixed flow cavity; wherein, be equipped with a plurality of reposition of redundant personnel holes on the lateral wall of casing, the reposition of redundant personnel hole is suitable for leading out interior mist mixing chamber's mist. The mixed flow device encloses through the casing and closes out interior mixed flow chamber to set up a plurality of diffluence holes with interior mixed flow chamber intercommunication on the casing, make mist can mix in the mixed flow intracavity, improved mist's mixing uniformity.

Description

Mixed flow device, gas mixing system, combustion system and water heater

Technical Field

The utility model relates to a gas air feeder technical field, concretely relates to mixed flow device, gas mixing system, combustion system and water heater.

Background

Gas heating stoves and gas water heaters can usually adopt the gas to heat, and the gas gets into the combustion chamber through gas system and burns.

At present, the full premix combustion technology is widely used, but the uniformity of mixing natural gas and air needs to be further improved.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the poor defect of the mixing homogeneity of the mist among the prior art to a mixed flow device that can improve the mixing homogeneity of mist is provided.

In order to solve the technical problem, the utility model provides a pair of mixed flow device, include: the shell surrounds the inner mixed flow cavity, and one end of the shell is provided with a mixed gas inlet suitable for introducing mixed gas into the inner mixed flow cavity; the side wall of the shell is provided with a plurality of shunting holes, and the shunting holes are suitable for guiding out the mixed gas in the inner mixed flow cavity.

Optionally, the flow mixing device further comprises: the flow deflector is arranged in the inner mixed flow cavity and connected with the shell, and the flow deflector is suitable for separating at least two adjacent flow guide cavities in the inner mixed flow cavity along a first direction; and the flow guide sheet is provided with a gas flow port so that the two adjacent flow guide cavities are communicated with each other.

Optionally, the flow mixing device comprises: the flow guide plates are arranged in the first direction, and the projection area of one of the flow openings is smaller than or equal to the projection areas of the other flow openings along the first direction.

Optionally, along the first direction, the projected area of the at least two circulation ports gradually decreases.

Optionally, the guide vane is of a conical structure.

Optionally, the housing is a cylindrical or conical cylinder, and one end of the cylindrical or conical cylinder is open and is suitable for forming the gas mixing inlet.

Optionally, the casing is provided with a flow guide plate which is arranged to incline towards a direction away from the casing near the flow distribution hole or at the flow distribution hole of the casing.

Optionally, a plurality of the diversion holes are staggered along the first direction.

Optionally, in the circumferential direction of the side wall of the housing, the distance between two adjacent shunting holes is the same.

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the poor defect of the mixing homogeneity of the mist among the prior art to a mixing gas system that can improve the mixing homogeneity of mist is provided.

In order to solve the technical problem, the utility model provides a pair of gas mixing system, include: the converging device encloses a converging cavity with a Venturi structure, and the converging cavity is provided with an air outlet end, a first air inlet end capable of introducing first air and a second air inlet end capable of introducing second air; any one of the flow mixing devices arranged in the confluence cavity _； The inner mixing cavity of the mixing device is communicated with the confluence cavity through the diversion holes.

Optionally, the gas mixing system further comprises: fixing sheet _， The fixing piece is arranged at the air outlet end, and a plurality of air outlets communicated with the confluence cavity are formed in the fixing piece; wherein, the casing of the flow mixing device is connected with the fixed plate.

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the poor defect of the mixing homogeneity of the mist among the prior art to a combustion system that can improve the mixing homogeneity of mist is provided.

In order to solve the technical problem, the utility model provides a pair of combustion system, include: the gas valve is provided with a gas inlet and a gas outlet, and the gas inlet is connected with a gas pipeline; the second air inlet end of the air mixing system is connected with the air outlet; the air supply device is connected with a first air inlet end of the air mixing system; and the combustion chamber is connected with the air outlet end of the air mixing system.

Therefore, the to-be-solved technical problem of the utility model lies in overcoming and adopting the fan front end to mix the gas and the air in advance among the prior art, influences the defect of mixing uniformity to a premixed water heater of fan rear end that can improve mist's mixing uniformity is provided.

In order to solve the technical problem, the utility model provides a pair of water heater, include: the combustion system.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a mixed flow device encloses through the casing and closes out interior mixed flow chamber to set up a plurality of branch discharge orifices with interior mixed flow chamber intercommunication on the casing, make the mixed gas mix including the mixed flow intracavity, improved the mixing uniformity of mixed gas.

2. The utility model provides a mixed flow device separates the water conservancy diversion chamber for two at least mutual intercommunications along the interior water conservancy diversion chamber of water conservancy diversion chamber through the water conservancy diversion piece that has the gas flow opening for mist reaches the homogeneous state after passing through a plurality of water conservancy diversion chambeies step by step, has further improved mist's homogeneity of mixing.

3. The utility model provides a mixed flow device through the crisscross setting of a plurality of diffluent holes edge first direction on the casing, and the mixed flow effect is better, and the mixture of mist is more even.

4. The utility model provides a mixed flow device can play the effect of carrying out the water conservancy diversion to the mist that flows out the diffluence hole through the guide plate, can further make the mist more even.

5. The utility model provides a mixed flow device, through water conservancy diversion piece back taper structure, the turbulent flow effect is better.

6. The utility model provides a gas mixing system locates the intracavity that converges through the mixed flow device for mist can form the turbulent flow in the mixed flow device, can provide mist's homogeneity.

7. The utility model provides a gas mixing system, under the effect of the venturi structure of the device that converges, the throat section pressure in chamber that converges diminishes, can produce from the second inlet end to the throat section mobile air current phenomenon in chamber that converges, the gas can get into the chamber that converges more fast under this effort, and at throat section position, the air is converged and is flowed to the end of giving vent to anger together with the gas.

8. The utility model provides a combustion system can reduce fan security performance's demand, reduces the cost of manufacture of fan.

9. The utility model provides a water heater, owing to including foretell combustion system, can improve the combustion effect.

10. The utility model provides a water heater, fan rear end mixes electric security in advance.

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 cross-sectional structural view of a flow mixing device according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a flow mixing device according to an embodiment of the present invention;

fig. 3 is an exploded view of a flow mixing device according to an embodiment of the present invention;

fig. 4 is an exploded schematic view of a gas mixing system according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a gas mixing system according to an embodiment of the present invention;

fig. 6 is a schematic cross-sectional structural view of a gas mixing system according to an embodiment of the present invention;

fig. 7 is a schematic top view of a gas mixing system according to an embodiment of the present invention;

fig. 8 is a schematic front view of a converging device of a gas mixing system according to an embodiment of the present invention;

fig. 9 is a schematic top view of a converging device of a gas mixing system according to an embodiment of the present invention;

fig. 10 is a schematic bottom view of a confluence device of a gas mixing system according to an embodiment of the present invention;

fig. 11 is a schematic perspective view of a combustion system according to an embodiment of the present invention.

Description of the reference numerals:

1-an air supply device; 2-a confluence device; 3-a flow mixing device; 4-a combustion chamber;

101-an air outlet;

21-a fixing sheet;

201-a converging cavity; 202-a first air intake end; 203-a second air inlet end; 204-gas outlet end;

205-a gas outlet; 206-outer mixing chamber;

31-a housing; 32-flow deflectors; 33-a baffle;

301-a flow guiding cavity; 302-a shunt hole; 303-inner mixing chamber; 304-mixed gas inlet.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

According to the premixing mode of gas, the method can be divided into premixing at the front end of a fan and premixing at the rear end of the fan. When the fan front end premixing mode is adopted, the high requirement on the sealing performance of the fan can be met, the uniformity of mixing of fuel gas and space can be influenced, and the fan manufacturing cost is high.

Example 1

A flow mixing device 3 as shown in fig. 1 to 3, comprising: the shell 31 encloses the inner mixed flow cavity 303, one end of the shell 31 is provided with a mixed gas inlet 304 suitable for introducing mixed gas into the inner mixed flow cavity 303, wherein the side wall of the shell 31 is provided with a plurality of shunting holes 302, and the shunting holes 302 are suitable for guiding out the mixed gas in the inner mixed flow cavity 303.

The shell 31 comprises a side wall and a top, the top and the side wall of the shell 31 enclose an inner mixed flow cavity 303, the inner mixed flow cavity 303 is provided with a gas mixing inlet 304, and part of the shell 31 is arranged opposite to the gas mixing inlet 304. A plurality of branch flow holes 302 are sequentially arranged on the shell 31 around the inner mixing chamber 303 at intervals, and the gas mixing inlet 304 is suitable for introducing mixed gas into the inner mixing chamber 303. The top of the shell 31 is opposite to the gas mixing inlet 304, and the mixed gas enters the inner mixing cavity 303 through the gas mixing inlet 304 to be mixed and then flows out of the diversion holes 302, so that the gas mixing tends to be uniform. The top of the casing 31 plays a role in guiding the mixed gas entering the inner mixing chamber 303, so that the gas flow of the mixed gas returns to the diversion hole 302 arranged on the casing 31 after reaching the top and flows out, and a further role in mixing can be played.

Further, as shown in fig. 1 and fig. 3, the flow mixing device 3 further includes: the guide vane 32 is arranged in the inner mixed flow cavity 303, the guide vane 32 is connected with the shell 31, and the guide vane 32 is suitable for dividing at least two guide cavities 301 in the inner mixed flow cavity 303 along the first direction Y. The flow deflector 32 is provided with a gas flow port 305, so that two adjacent flow guide cavities 301 are communicated with each other.

The shell 31 is provided with a plurality of diversion holes 302 which are sequentially spaced from each other around the corresponding diversion cavity 301 and are annularly arranged, the diversion holes 302 are arranged on the side wall of the shell 31 corresponding to each diversion cavity 301, the edge of each diversion sheet 32 can be connected with the shell 31, each diversion sheet 32 plays a role in guiding the gas entering the corresponding diversion cavity 301, and after the gas flow of the mixed gas is further contacted with each diversion sheet 32, a part of the mixed gas flows out from the diversion holes 302 corresponding to the diversion cavity 301 where the mixed gas is located along each diversion sheet 32, and a part of the mixed gas further enters the adjacent diversion cavity 301 through the gas flow port 305 along the first direction Y to be further mixed, so that the mixed gas can be further uniformly mixed by arranging the diversion sheets 32.

The flow mixing device 3 forms a turbulator, the guide vanes 32 can form a layered turbulator, and under the action of the layered turbulator, the mixed gas is sprayed out from each flow-dividing hole 302 after being subjected to multiple turbulent flows, so that two laminar flows are changed into turbulent mixed gas, and the mixing effect of the mixed gas can be enhanced.

Further, as shown in fig. 1, the flow mixing device includes at least two flow deflectors 32, and the at least two flow deflectors 32 are disposed along a first direction Y, along which the projection area of one flow opening 305 is smaller than or equal to the projection area of the other flow openings 305

As shown in fig. 1, the casing 31 and the plurality of baffles 32 may form a plurality of turbulent flow guiding cavities 301, so that the mixing effect is good. The guide plate 32 may be fixed to the housing 31 by welding, and is used to guide the mixed gas to be ejected from each of the diversion holes 302.

The guide vanes 32 may be disposed in the inner mixing chamber 303 at intervals of two in the first direction Y. For convenience of description, the flow deflectors 32 close to the gas mixing inlet 304 are first flow deflectors, the flow deflectors 32 far from the gas mixing inlet 304 are second flow deflectors, and the projection area of the gas flow openings 305 of the first flow deflectors of the second flow deflectors in the first direction Y is larger than that of the gas flow openings 305 of the second flow deflectors in the first direction Y, so that the mixed gas can flow into the flow guiding cavity 301 enclosed between the first flow deflectors and the second flow deflectors more, the staying time and the traveling path of the mixed gas in the inner flow cavity 303 are increased, and the uniformity of the mixed gas can be further improved. Of course, as an alternative embodiment, the projection area of the gas flow openings 305 of the first guide vane in the first direction Y is equal to the projection area of the gas flow openings 305 of the second guide vane in the first direction Y, and uniform gas mixing can also be achieved _。

Specifically, the first flow deflector and the second flow deflector can correspondingly form three flow guide cavities 301 including a first flow guide cavity, a second flow guide cavity and a third flow guide cavity in the inner flow mixing cavity 303 along the first direction Y, and the mixed gas is diverged and ejected from the corresponding flow splitting holes 302 after passing through the three-time turbulent flow, so that two laminar gases are changed into a turbulent mixed gas, and the mixing effect of the mixed gas is enhanced. After the mixed gas enters the first flow guide cavity, a part of the mixed gas enters the second flow guide cavity through the gas flow opening 305 on the first flow guide plate 32, and the other part of the mixed gas enters the outer flow mixing cavity 206 through the flow dividing hole 302 corresponding to the first flow guide cavity, so as to form a first layer of turbulent flow; one part of the mixed gas entering the second diversion cavity enters the third diversion cavity through a gas flow port 305 on the second diversion piece, and the other part of the mixed gas enters the outer mixing cavity 206 through a diversion hole 302 corresponding to the second diversion cavity to form turbulent flow of a second layer; the mixed gas entering the third diversion cavity directly enters the outer mixing cavity 206 through the diversion holes 302 corresponding to the third diversion cavity to form a third layer of turbulent flow. The mixed gas enters the diffusion section of the converging cavity 201 after being mixed for the first time through the throat section of the converging cavity 201. Because the flow mixing device 3 is arranged at the diffusion section of the converging cavity 201, after the gas subjected to primary mixing enters the turbulence of the first layer, the second layer and the third layer of the turbulator, secondary mixing of the mixed gas is realized, so that the gas and the air are mixed more uniformly and the combustion is more sufficient.

As an alternative embodiment the number of baffles 32 may be one, three. Of course, as an alternative embodiment, the guide vane 32 may not be provided, and only one inner mixing chamber 303 is provided in the housing 31, and at least a portion of the mixed gas enters the inner mixing chamber 303, and then flows through the diversion hole 302 to enter the outer mixing chamber 206 for secondary mixing.

When the mixed gas enters the layered turbulator, the gas close to the inner wall of the air inlet of the shell 31 is firstly intercepted and guided by the corresponding guide vane 32, the direction of the gas is changed, the air is further mixed with the fuel gas, the laminar flow is changed into the turbulent flow, and the mixed gas is ejected from the corresponding diversion hole 302. Because the number of the diversion holes 302 is limited, the diversion sheet 32 can intercept the whole circle of mixed gas, and the redundant un-ejected gas is further mixed in the diversion cavity 301 of the first layer and affects the subsequent laminar mixed gas, so that the state of the laminar mixed gas is changed, and the turbulent effect of the first layer is realized. Similarly, the turbulence of the second layer is achieved by another baffle 32, which intercepts the mixer gas in the middle of the laminar turbulator, and the principle of action is the same as that of the first layer. The third layer is that the central mixed gas of the layered turbulators is intercepted by the top of the layered turbulators to change the airflow state, the action principle is the same as that of the guide vanes 32, and three times of mixing is formed.

Further, along the first direction Y, the projected areas of the at least two communication ports 305 gradually decrease.

Further, as shown in continued reference to fig. 1 and 3, the baffle 32 has a conical configuration.

The housing 31 is a cylindrical or conical cylinder, one end of which is open and is adapted to form the gas mixture inlet 304.

The housing 31 is cylindrical, and an opening is formed at an end of the cylindrical housing 31 away from the top, and is adapted to form the gas mixing inlet 304. The flow deflector 32 may be an inverted conical structure, which provides better turbulent flow. After the mixed gas enters the gas-mixed inlet 304, the mixed gas is intercepted by the flow deflector 32 close to the gas-mixed inlet 304, that is, the first flow deflector, and the gas changes direction and is further mixed, and changes from laminar flow to turbulent flow, which is the turbulent flow effect of the first layer. In a similar way, the turbulent flow effect of the second layer is realized by the second flow deflector, the mixed gas which enters the second flow guide cavity in a layered mode is intercepted, the action principle is the same as that of the first flow deflector, and the turbulent flow effect of the second layer is formed. The third layer is to change the state of the air flow by intercepting the top of the shell 31, the action principle is the same as that of the guide vane 32, and three times of mixing is formed.

The casing 31 may also be an elliptical cylinder, a pyramid, a cube, a cuboid or an irregular cylinder, as long as the mixed flow device 3 encloses a cavity.

Further, the baffle 33 is disposed in the housing 31 near the diversion hole 302 or in the diversion hole 302 of the housing 31 and is inclined away from the housing 31.

The above-mentioned baffle 33 can play the role of guiding the mixed gas flowing out of the diversion holes 302, and can further make the mixed gas more uniform. An included angle alpha formed by the central axis L1 where the guide plate 33 is located and the central axis L2 where the flow mixing device 3 is located is an acute angle, namely, the guide plate 33 inclines upwards away from the shell 31. As an alternative embodiment, the included angle α formed by the central axis L1 of the baffle 33 and the central axis L2 of the flow mixing device 3 may also be an obtuse angle, i.e. the baffle 33 is inclined downwards away from the housing 31.

Further, the plurality of the diversion holes 302 are arranged in a staggered manner along the first direction Y, and specifically, as shown in fig. 2 and fig. 3, in the first direction Y, the projections of two adjacent diversion holes 302 on a plane perpendicular to the first direction Y may partially overlap, so that the mixed flow is more uniform.

Furthermore, the distance between two adjacent diversion holes 302 is the same in the circumferential direction of the side wall of the housing 31, and the mixed flow is more uniform as shown in fig. 2 and 3.

Example 2

The gas mixing system shown in fig. 4 to 10 includes a confluence device 2 and a flow mixing device 3 of any one, the confluence device 2 encloses a confluence cavity 201 with a venturi structure, the confluence cavity 201 has an outlet end 204, a first inlet end 202 into which a first gas can be introduced, and a second inlet end 203 into which a second gas can be introduced, the flow mixing device 3 is disposed in the confluence cavity 201; wherein, the inner mixing cavity 303 of the mixing device 3 is communicated with the confluence cavity 201 through the diversion hole 302.

With reference to fig. 4 and fig. 6, the flow mixing device 3 is disposed at the outlet 204 of the converging cavity 201, and the first gas can enter the converging cavity 201 through the first inlet 202. The second gas enters the confluence cavity 201 from the second gas inlet end 203, the first gas and the second gas are premixed for the first time in the confluence cavity 201 and flow to the gas outlet end 204 together, when the mixed gas further flows to the mixed gas inlet 304 of the mixing device 3, the mixed gas further passes through the mixing device 3 to be mixed for the second time, the mixing effect of two-stage mixing is better, and therefore the uniformity of the mixed gas can be achieved.

Further, as shown in fig. 5 and 7, the air mixing system further includes: fixing piece 21 _， The fixed plate 21 is disposed at the air outlet 204, and the fixed plate 21 is disposed with a plurality of air outlets 205 communicated with the converging cavity 201, wherein the casing 31 of the flow mixing device 3 is connected with the fixed plate 21. Housing 31 _、 The fixing plate 21 and the housing of the converging device 2 together enclose an annular outer mixing cavity 206, the plurality of flow guide cavities 301 of the converging device 2 are respectively communicated with the outer mixing cavity 206, and the gas outlet 205 is arranged to be communicated with the outer mixing cavity 206.

The fixing piece 21 may be connected to the end face of the air outlet end 204 by a screw, or may be welded or riveted. The top of the shell 31 of the flow mixing device 3 is provided with a connecting hole, the center of the fixing plate 21 is provided with a through hole, and a connecting piece is connected with the through hole of the fixing plate 21 through the connecting hole at the top of the shell 31, wherein the connecting piece can be a screw or a bolt or a buckle. Of course, the top of the flow mixing device 3 can also be welded to the fixing plate 21.

The top of the mixed flow device 3 is blocked, and the mixed gas flow enters the outer mixed flow cavity 206 from the corresponding flow guide cavity 301 and the flow dividing holes 302 after being turned back at the top of the mixed flow device 3, so that the uniformity of the mixed gas entering the outer mixed flow cavity 206 can be improved. The connecting hole is arranged in the middle of the top surface of the flow mixing device 3, a plurality of gas outlets 205 can be arranged around the connecting hole, and the gas outlets 205 can be arranged corresponding to the outer flow mixing cavity 206.

The fixing plate 21 may guide and divide the mixed gas entering the outer mixed flow cavity 206, and the gas outlet 205 is disposed at the periphery of the projection of the housing 31 on the plane perpendicular to the first direction Y, so that the gas outlet 205 is communicated with the outer mixed flow cavity 206. Under the shunting action of the fixing piece 21, the mixed gas of the first gas and the second gas flows out of the outer mixed flow cavity 206 in a uniform state.

Specifically, as shown in fig. 6, the bus chamber 201 of the bus device 2 may include three portions: the air inlet part is provided with a first air inlet end 202, the first air inlet end 202 is provided with a cavity with a cubic structure, the air outlet 101 partially extends into the first air inlet end 202, and the air outlet 101 and the first air inlet end 202 can be connected through screws.

Further, as shown with continued reference to FIG. 6, the converging chamber 201 includes a venturi structure having an absorbing section, a throat section, and a diffuser section. The projection area of the absorption section of the manifold cavity 201 along the first direction Y is gradually reduced, the projection area of the throat section of the manifold cavity 201 along the first direction Y is unchanged, and the projection area of the diffuser section of the manifold cavity 201 along the first direction Y is gradually increased.

The throat section of the converging cavity 201 is provided with a second air inlet end 203, the second air inlet end 203 may extend in a second direction X, and the second direction X and the second direction Y may be perpendicular to each other. Under the action of the venturi structure, the pressure at the middle section of the converging cavity 201 becomes lower, which generates an airflow phenomenon flowing from the second air inlet end 203 to the throat section of the converging cavity 201, the second air can more rapidly enter the converging cavity 201 under the action of the airflow phenomenon, and at the position of the throat section, the second air and the first air are converged and flow together to the air outlet end 204.

As shown in fig. 9 and 10, the mixed gas entering the diversion chamber 301 of the flow mixing device 3 further enters the outer flow mixing chamber 206 for further mixing, so that the first gas and the second gas are mixed more fully. After the mixed gas enters the first flow guide cavity, a part of the mixed gas enters the second flow guide cavity through the gas flow opening 305 on the first flow guide plate, and the other part of the mixed gas enters the outer flow mixing cavity 206 through the flow dividing hole 302 corresponding to the first flow guide cavity to form a first layer of turbulent flow; one part of the mixed gas entering the second diversion cavity enters the third diversion cavity through a gas flow port 305 on the second diversion piece, and the other part of the mixed gas enters the outer diversion cavity 206 through a diversion hole 302 corresponding to the second diversion cavity to form a second layer of turbulent flow; the mixed gas entering the third diversion cavity directly enters the outer mixing cavity 206 through the diversion holes 302 corresponding to the third diversion cavity to form a third layer of turbulent flow. The mixed gas enters the diffuser section of the manifold 201 after being mixed for the first time through the throat section of the manifold 201. Because the flow mixing device 3 is arranged at the diffusion section of the converging cavity 201, after the gas subjected to primary mixing enters the turbulence of the first layer, the second layer and the third layer of the turbulator, secondary mixing of the mixed gas is realized, so that the gas and the air are mixed more uniformly and the combustion is more sufficient.

As an alternative embodiment the number of baffles 32 may be one, three. Of course, as an alternative embodiment, the guide vane 32 may not be provided, and only one inner mixing chamber 303 is provided in the housing 31, and at least a portion of the mixed gas enters the inner mixing chamber 303, and then flows through the diversion hole 302 to enter the outer mixing chamber 206 for secondary mixing.

Simultaneously, a plurality of reposition of redundant personnel holes 302 use first direction Y as the axle center, can upwards be heliciform evenly distributed, can understand, a plurality of reposition of redundant personnel holes 302 that casing 31 from the bottom up laid, the line at a plurality of reposition of redundant personnel hole centers is the helix, make a plurality of reposition of redundant personnel holes 302 stagger on first direction Y, the gas mixture can be more evenly be full of the end 204 of giving vent to anger that joins device 2, the turbulent effect has further been strengthened, finally reach high-efficient mixing, then in getting into combustion chamber 4 evenly through gas outlet 205 on stationary blade 21, realize high-efficient burning.

Furthermore, along the first direction Y, the first air inlet end 202 and the air outlet end 204 are disposed opposite to each other, and the plurality of flow guide cavities 301 are sequentially disposed in layers along the direction from the first air inlet end 202 to the air outlet end 204, so that the mixed gas is mixed more fully.

Example 3

A combustion system as shown in fig. 11, comprising: the gas valve is not shown in the figure, the gas mixing system, the air supply device 1 and the combustion chamber 4, the gas valve is provided with an air inlet and an air outlet, the air inlet is connected with a gas pipeline, the second air inlet end 203 of the gas mixing system is connected with the air outlet, the air supply device 1 is connected with the first air inlet end 202 of the gas mixing system, and the combustion chamber 4 is connected with the air outlet end 204 of the gas mixing system.

The air supply device 1 can be a fan, and the air supply device 1 provides mixed power and clean air for gas mixing and combustion. Under the action of the air supply device 1, air enters the inside of the air supply device 1 from the air inlet of the air supply device 1, enters the first air inlet end 202 of the confluence device 2 from the air outlet 101 of the air supply device 1, and then enters the confluence cavity 201. The gas enters the confluence cavity 201 of the confluence device 2 from the second gas inlet end 203, and the gas and the air are mixed in the confluence cavity 201 and flow to the gas outlet end 204 together. The mixed gas is further mixed and more uniform through the plurality of flow guide cavities 301, and then is uniformly sprayed out from the gas outlet 205.

It can be known that, the air supply device 1 of the air mixing system provides motive power for air suction, gas suction, and air and gas mixing, and the confluence device 2 generates suction kinetic energy to the gas under the action of air flow, so that the gas can smoothly enter the mixing device 3 to enhance the mixing effect of the air and the gas, and the gas can uniformly flow to the combustion chamber 4, thereby realizing efficient combustion.

Example 4

A water heater comprises the combustion system.

According to the water heater, the mixed gas is premixed at the rear end of the fan, the electrical safety is high, and the combustion effect of the water heater is improved due to the fact that the mixing uniformity of the mixed gas is improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.

Claims (13)

1. A flow mixing apparatus, comprising:

the gas mixing device comprises a shell (31) enclosing an inner mixing cavity (303), wherein one end of the shell (31) is provided with a gas mixing inlet (304) suitable for introducing mixed gas into the inner mixing cavity (303);

the side wall of the shell (31) is provided with a plurality of shunting holes (302), and the shunting holes (302) are suitable for guiding out the mixed gas of the inner mixing cavity (303).

2. The flow mixing device of claim 1, further comprising:

at least one guide vane (32) arranged in the inner mixing cavity (303), wherein the guide vane (32) is connected with the shell (31), and the guide vane (32) is suitable for separating at least two guide cavities (301) in the inner mixing cavity (303) along a first direction (Y);

the flow guide sheet (32) is provided with a gas flow opening (305) so that two adjacent flow guide cavities (301) are communicated with each other.

3. The flow mixing device of claim 2, comprising:

at least two flow deflectors (32), at least two flow deflectors (32) being arranged along the first direction (Y), along which direction (Y) the projected area of one of the flow openings (305) is smaller than or equal to the projected area of the other flow openings (305).

4. A flow mixing device according to claim 3, wherein the projected area of the at least two flow openings (305) decreases gradually along the first direction (Y).

5. A flow mixing device according to any one of claims 2 to 4, characterised in that the guide vanes (32) are of conical configuration.

6. A flow mixing device according to claim 5, wherein the housing (31) is a cylindrical or conical cylinder open at one end adapted to form the mixed gas inlet (304).

7. A flow mixing device according to any one of claims 1 to 4, characterised in that a deflector (33) is provided in the housing (31) adjacent the flow dividing aperture (302) or in the flow dividing aperture (302) of the housing (31) inclined away from the housing (31).

8. The flow mixing device according to any one of claims 1 to 4, characterized in that a plurality of the flow dividing holes (302) are staggered in the first direction (Y).

9. The flow mixing device according to claim 8, characterized in that the distance between two adjacent flow dividing holes (302) is the same in the circumferential direction of the side wall of the housing (31).

10. A gas mixing system, comprising:

the confluence device (2) encloses a confluence cavity (201) with a Venturi structure, and the confluence cavity (201) is provided with an air outlet end (204), a first air inlet end (202) through which a first air can be introduced and a second air inlet end (203) through which a second air can be introduced;

the flow mixing device (3) as claimed in any one of claims 1 to 9, provided in the converging flow chamber (201) _；

Wherein the inner mixing cavity (303) of the mixing device (3) is communicated with the confluence cavity (201) through the flow dividing hole (302).

11. The gas mixing system of claim 10, further comprising:

securing sheet (21) _， The gas outlet end (204) is arranged, and a plurality of gas outlets (205) communicated with the confluence cavity (201) are formed in the fixed plate (21);

wherein a housing (31) of the flow mixing device (3) is connected with the fixed plate (21).

12. A combustion system, comprising:

the gas valve is provided with a gas inlet and a gas outlet, and the gas inlet is connected with a gas pipeline;

gas mixing system according to claim 10 or 11, wherein the second gas inlet end (203) of the gas mixing system is connected with the gas outlet;

the air supply device (1) is connected with a first air inlet end (202) of the air mixing system;

and the combustion chamber (4) is connected with the gas outlet end (204) of the gas mixing system.

13. A water heater, comprising:

the combustion system of claim 12.

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