CN108167906B - Range hood capable of increasing pressure difference - Google Patents
Range hood capable of increasing pressure difference Download PDFInfo
- Publication number
- CN108167906B CN108167906B CN201810188650.1A CN201810188650A CN108167906B CN 108167906 B CN108167906 B CN 108167906B CN 201810188650 A CN201810188650 A CN 201810188650A CN 108167906 B CN108167906 B CN 108167906B
- Authority
- CN
- China
- Prior art keywords
- concentric tube
- range hood
- concentric
- oil smoke
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Separating Particles In Gases By Inertia (AREA)
- Ventilation (AREA)
Abstract
A range hood capable of increasing pressure difference is provided with a range hood main body and an oil fume separator capable of generating centrifugal force to separate oil fume particles, wherein the oil fume separator is assembled inside the range hood main body in a transmission mode. The oil smoke separator is provided with many concentric tubes, rotation axis and a plurality of eaves portion structure of axis coincidence, and the rotation axis respectively with the fixed connection of many concentric tubes's one end, a plurality of eaves portion structures respectively with encircle in the other end of concentric tube and with the concentric tube fixed connection who corresponds, the rotation axis is connected with the motor drive of cigarette machine main part. This lampblack absorber just can mention the pressure differential between inside and the external environment through the diameter of injecing concentric tube both ends and the distance of lower adjacent concentric tube, reaches to improve the oil absorption effect. The oil smoke separator also generates additional centrifugal force to oil smoke gas, can effectively remove oil smoke particles, can avoid the contact of the gas containing a large amount of oil smoke particles and the wind wheel, greatly improves the separation effect of the oil smoke particles and reduces the noise generated by the accumulated oil stain of the wind wheel.
Description
Technical Field
The invention relates to the field of range hoods, in particular to a range hood capable of increasing pressure difference.
Background
The fume exhauster is also called as fume exhauster, and is a kitchen electric appliance for purifying kitchen environment. The range hood is arranged above a kitchen stove, can rapidly pump away wastes burnt by the stove and oil smoke harmful to human bodies generated in the cooking process, and exhaust the wastes and the oil smoke to the outside, reduces pollution, purifies air, and has the safety guarantee effects of gas defense and explosion prevention.
In the prior art, the range hood has three forms of top suction, side suction and lower discharge. The three range hoods only rely on the rotation of the wind wheel to enable the interior of the range hood to generate negative pressure, so that the gas in the external environment flows in the range hood, but the pressure difference between the interior and the external environment is small, and the oil absorption efficiency is low.
Therefore, aiming at the defects of the prior art, the range hood capable of increasing the pressure difference is necessary to solve the defects of the prior art.
Disclosure of Invention
The invention aims to avoid the defects of the prior art and provide the range hood capable of increasing the pressure difference. This lampblack absorber that can increase pressure differential improves the pressure differential of the inside and external environment of oil machine to improve the oil absorption effect.
The above object of the present invention is achieved by the following technical means.
The range hood capable of increasing the pressure difference is provided with a range hood main body and an oil fume separator capable of generating centrifugal force to separate oil fume particles, and the oil fume separator is assembled inside the range hood main body in a transmission mode.
The oil smoke separator is provided with many concentric tubes, rotation axis and a plurality of eaves portion structure of axis coincidence, and the rotation axis is respectively with the fixed connection of many concentric tubes's one end, and a plurality of eaves portion structures are around setting up and fixed mounting in the other end of the concentric tube that corresponds and with the concentric tube fixed connection that corresponds, and the rotation axis is connected with the motor transmission of cigarette machine main part.
The diameter of one end of the same concentric tube is defined as D 1 And the diameter of the other end is defined as D 2 And D is 2 ≤D 1 。
Further, 1.4D 2 ≤D 1 。
Defining the minimum distance from the outer wall of the end part of one end of the same concentric tube to the outer wall of the adjacent concentric tube towards the central axis direction as E 1 E is defined as the minimum distance from the outer wall of the end of the other end of the concentric tube to the outer wall of the adjacent concentric tube in the axial direction 2 ，E 2 ≥0.4E 1 。
Preferably, the concentric tube is formed by a plurality of broken lines surrounding the central axis, and the intersection position of two adjacent line segments on the inner wall of the concentric tube is a vortex generation position.
The concentric tubes from the middle axis to the outside are sequentially defined as the 1 st concentric tube, the i th concentric tube, the n-1 st concentric tube, the n th concentric tube, wherein i is more than or equal to 2 and less than or equal to n, and n is a positive integer.
Height of the 1 st concentric tube is H 1 Said i Said n-1 concentric tubes have a height H n-1 The height of the n-th concentric tube is H n ，H 1 Has the maximum value of H n The value of (c) is minimal.
Preferably, 1.1H mentioned above n ≤H i ≤10H n And 0.5H i-1 ≤H i ≤3H i-1 。
Preferably, the height H of the 1 st concentric tube is 1 Not more than 1m.
Preferably, the eaves structure is provided with a plurality of through holes.
Preferably, the concentric tubes are provided with turbulence means which are seamlessly connected around the ends of one end of the concentric tubes.
The one side definition that moves towards ground when installing the lampblack absorber is the below, the oil smoke separator still is provided with vortex generating device group, and vortex generating device group fixed mounting is in the surface of concentric tube and encircles in eaves portion structure and the junction of concentric tube, and vortex generating device group installs in the upper surface of eaves portion structure.
Each vortex generating device group consists of one or more vortex generating sub-devices in the same eaves structure.
Preferably, the vortex generating device groups are m, m is any positive integer greater than 0, and the m vortex generating device groups are respectively fixedly installed on the outer surfaces of the concentric tubes and surround the connection part of the eaves part structure and the concentric tubes.
Preferably, at least one eave structure is fixedly connected to the other end of the concentric tube.
Preferably, the range hood main body is provided with a shell, an air draft assembly and an oil collecting device, the oil smoke separator is rotatably installed inside the shell, the air draft assembly is fixedly assembled inside the shell and located above the oil smoke separator, and the oil collecting device is assembled at the bottom of the shell.
Preferably, the casing is provided with a plurality of casing air inlets and annular sheets matched with the plurality of casing air inlets, the annular sheets are fixedly mounted or integrally connected to the corresponding inner surface of the casing and positioned at the edges of the casing air inlets, and the annular sheets correspond to the casing air inlets one to one.
Preferably, above-mentioned convulsions subassembly is provided with fan, wind wheel and spiral case, and the fan assembles inside the spiral case, and the wind wheel is connected with the fan transmission, and spiral case fixed mounting communicates with each other with the gas outlet of concentric pipe top in the inside air inlet of spiral case of cigarette machine main part, and the gas outlet of spiral case communicates with each other with the gas outlet of cigarette machine main part.
Preferably, the housing is a spherical housing.
The range hood capable of increasing the pressure difference is provided with a range hood main body and an oil fume separator capable of generating centrifugal force to separate oil fume particles, wherein the oil fume separator is assembled in the range hood main body in a transmission mode. The oil smoke separator is provided with many centraxonial coincident concentric tubes, rotation axis and a plurality of eaves portion structure, the rotation axis respectively with the fixed connection of many concentric tubes's one end, a plurality of eaves portion structures respectively with encircle in concentric tubes's the other end and with the concentric tube fixed connection who corresponds, the rotation axis is connected with the motor drive of cigarette machine main part. The diameter of one end of the same concentric tube is defined as D 1 And the diameter of the other end is defined as D 2 And D is 2 ≤D 1 . This can increase the lampblack absorber of pressure differential through the diameter of injecing the concentric tube both ends and the distance of adjacent concentric tube down, just can mention the pressure differential between inside and the external environment, reach and improve the oil absorption effect. This oil smoke separator of lampblack absorber that can increase pressure differential still produces additional centrifugal force to oil smoke gas, can effectively desorption oil smoke particle, can avoid containing a large amount of oil smoke particle gas and wind wheel contact, improves oil smoke particle's separation effect greatly and reduces because of the noise that the wind wheel accumulation oil stain produced.
Drawings
The invention is further illustrated by means of the attached drawings, the content of which is not in any way limiting.
Fig. 1 is a schematic structural diagram of an embodiment 1 of a range hood capable of increasing a pressure difference according to the present invention.
Fig. 2 is a schematic structural view of the oil smoke separator in fig. 1.
FIG. 3 is D 1 And D 2 Schematic diagram of the relationship between them.
FIG. 4 is E 1 And E 2 Schematic diagram of the relationship between them.
Fig. 5 is a highly schematic view of concentric tubes.
Fig. 6 is an external view of the housing and the oil collecting device of the present invention.
Fig. 7 is a simulation diagram of the flow of soot body gas according to the present invention.
Fig. 8 is a sectional perspective view of the oil smoke separating assembly.
In fig. 1 to 8, there are included:
a lampblack separator 1, a concentric tube 11, a spoiler 111, a rotating shaft 12, an eave structure 13, a through hole 131, a vortex generating device group 14, a vortex generating position 15,
The air-conditioning device comprises a shell 2, a shell air inlet 21, an annular sheet 22, an oil collecting device 3, a motor 4 and an air draft assembly 5.
Detailed Description
The technical solution of the present invention is further illustrated by the following examples.
Example 1.
A range hood capable of increasing pressure difference is provided with a range hood main body and a lampblack separator 1 capable of generating centrifugal force to separate lampblack particles, wherein the lampblack separator 1 is arranged in the range hood main body in a transmission mode as shown in figures 1 to 6. Oil smoke separator 1 is provided with many concentric tubes 11 of axis coincidence, rotation axis 12 and a plurality of eaves portion structure 13, rotation axis 12 respectively with the fixed connection of many concentric tubes 11's one end, a plurality of eaves portion structures 13 be around setting up and fixed mounting in the other end of the concentric tube 11 that corresponds and with the concentric tube fixed connection that corresponds, rotation axis 12 is connected with the motor 4 transmission of cigarette machine main part.
The diameter of one end of the same concentric tube 11 is defined as D 1 And the diameter of the other end is defined as D 2 ，D 1 And D 2 The relation between them is preferably 1.4D 2 ≤D 1 D of the present invention 1 And D 2 May also be D 2 ≤D 1 。
D 1 And D 2 The relationship between the two is that the greater the area through which the fluid flows, the smaller the flow velocity, i.e. the greater the velocity of one end of the gas concentric tube 11 than the other end of the concentric tube 11, according to the venturi effect. Further, as seen from Bernoulli's law, the higher the velocity of the gas, the lower the pressure, and therefore the end of the concentric tube 11 connected to the updraft assembly 5The pressure is high, and the pressure of the air inlet of the concentric tube 11 is low, so that the pressure difference between the air inlet of the concentric tube 11 and the external environment is increased, oil smoke gas is promoted to enter, and the oil absorption effect is improved.
E is defined as the minimum distance from the outer wall of the end of one end of the same concentric tube 11 to the outer wall of the adjacent and axially oriented concentric tube 11 1 E is defined as the minimum distance from the outer wall of the end of the other end of the concentric tube 11 to the outer wall of the adjacent and axially oriented concentric tube 11 2 ，E 2 ≥0.4E 1 。
Because E 2 Too small reduces the area of gas entering the interior of the concentric tube 11, reducing the efficiency of the gas entering the inlet of the soot separator 1.
The concentric tube 11 is formed by a line segment formed by a plurality of broken lines surrounding the middle axis for a circle, and the intersection position of two adjacent line segments on the inner wall of the concentric tube 11 is a vortex generation position 15, as shown in fig. 8. The shape of the concentric tube 11 of the invention has the function of enabling the oil smoke gas to generate vortex on the inner wall of the concentric tube 11 and improving the efficiency of removing the oil smoke.
Height of the 1 st concentric tube is H 1 The height of the ith concentric tube is H i Said n-1 concentric tubes have a height H n-1 The height of the n-th concentric tube is H n ，H 1 Has the maximum value of H n The value of (c) is minimal. 1.1H n ≤H i ≤10H n And 0.5H i-1 ≤H i ≤3H i-1 . Height H of No. 1 Concentric tube 1 Not more than 1m.
The concentric tubes 11 are provided with flow perturbation means 111, the flow perturbation means 111 being connected seamlessly around the end of one end of the concentric tubes 11. The flow disturbance device 111 functions to generate a vortex flow of the soot gas, thereby improving the oil removing capability.
One side definition towards ground when installing the lampblack absorber is the below, oil smoke separator 1 still is provided with vortex generating device group 14, and vortex generating device group 14 fixed mounting is in the surface of concentric tube 11 and surrounds in eaves portion structure 13 and the junction of concentric tube 11, and vortex generating device group 14 is installed in the upper surface of eaves portion structure 13.
Each group 14 of vortex generating devices consists of one or more vortex generating sub-devices of the same eave structure 13.
The number of the vortex generating device groups 14 is m, m is any positive integer larger than 0, and the m vortex generating device groups 14 are respectively and fixedly installed on the outer surface of the concentric pipe 11 and surround the joint of the eaves structure 13 and the concentric pipe 11.
N =3 in the present embodiment, that is, the concentric tubes 11 in the present embodiment are provided with 3. In this embodiment, m =2, that is, the vortex generating device group 14 is provided in 2, one is provided in the 3 rd concentric tube, and the other is provided in the 2 nd concentric tube. The number of concentric tubes 11 of the present invention can be any positive integer, and the set of vortex generating devices 14 can be less than or equal to any positive integer number of concentric tubes 11.
At least one eaves structure 13 is fixedly connected to the other end of the concentric tubes 11. The other end of the concentric tubes 11 of the present invention may be fixedly connected with at least one eaves structure 13, or the other end of the concentric tubes 11 may be fixedly connected with only one eaves structure 13. The other end of the 1 st concentric tube of this embodiment connects two eave structures 13.
Two eaves portion structure 13 effects of 1 st concentric union coupling have reduced the space volume between 1 st concentric pipe and the 2 nd concentric pipe to reduce the area of the air inlet of the 2 nd concentric pipe, improved gaseous admission speed, increase the pressure differential of 11 inside and exterior spaces of concentric pipe.
The cigarette machine main part is provided with shell 2, convulsions subassembly 5 and oil collecting device 3, and oil smoke separator 1 is rotatory to be installed in the inside of shell 2, and convulsions subassembly 5 fixed mounting just is located oil smoke separator 1's top in the inside of shell 2, and oil collecting device 3 assembles in the bottom of shell 2. The housing 2 is provided with a plurality of housing air inlets 21 and a ring-shaped sheet 22 matching with the plurality of housing air inlets 21, the ring-shaped sheet 22 is integrally connected with the corresponding inner surface of the housing 2 and is located at the edge of the housing air inlets 21, the ring-shaped sheet 22 and the housing air inlets 21 are in one-to-one correspondence, the ring-shaped sheet 22 of the present invention can also be fixedly installed on the housing, and the specific implementation mode is determined by implementation conditions.
The ring-shaped piece 22 is used to generate vortex when the oil smoke gas enters the housing 2, and also to prevent oil smoke particles from being thrown out of the external space from the housing air inlet 21 of the housing 2 when the oil smoke particles are thrown out of the oil smoke separator 1.
The air draft assembly 5 is provided with a fan, a wind wheel and a volute, the fan is assembled inside the volute, the wind wheel is in transmission connection with the fan, the volute is fixedly installed inside the cigarette machine main body, an air inlet of the volute is communicated with an air outlet above the concentric tube 11, and an air outlet of the volute is communicated with an air outlet of the cigarette machine main body. The housing 2 of the present invention is a spherical housing 2.
The working principle of the range hood is as follows: the range hood is opened, the motor 4 drives the oil smoke separator 1, the wind wheel of the air draft assembly 5 rotates simultaneously, oil smoke particles are separated in seven layers in the range hood, and finally the oil smoke particles are discharged from an almost clean gas outlet, as shown in fig. 7. The seven-layer separation is specifically as follows:
first layer separation, inertial separation: the oil smoke enters the interior of the range hood through the shell air inlet 21 of the shell 2, and the oil smoke enters the annular sheet 22 after entering the shell air inlet 21, because of the pressure difference between the interior of the shell 2 and the external environment and the sudden change of the area of the shell air inlet 21, the air flow speed is accelerated, and the inertia momentum is relatively increased. And the oil smoke will form a very thin boundary layer around the ring-shaped sheet 22, and because the outer shell air inlet 21 of the outer shell 2 forms an included angle with the ring-shaped sheet 22, the oil smoke is forced to flow upwards and enter the oil smoke separator 1 after flowing downwards along the ring-shaped sheet 22, so that the heavier oil moves downwards separately from the crude oil smoke flow field in the downward inertial motion and is collected in the oil collecting device 3 at the bottom of the outer shell 2, and the first inertial separation is realized.
Second layer separation, vortex separation: the oil smoke particles separated by the first layer further generate flow field separation from the downward-upward flowing flow in the direction of the annular sheet 22, and the oil smoke particles cause an unstable flow field under the flow field separation to further form a vortex. The flow field or the vortex flow and the adjacent flow field or the vortex flow are mutually influenced mutually, a continuously rotating flow field is formed on the annular sheet 22, and the rotating vortex flow reaches the maximum vortex quantity. The remaining light oil smoke will not stop at the rotating vortex of the annular sheet 22 and accumulate, and when a certain weight is accumulated, the flow field will not support the weight of the oil drop, and will fall downwards or flow along the annular sheet 22 to the oil collecting device 3.
Third layer separation, centrifugal separation: the eaves structure 13 rotates following the concentric tubes 11 creating a centrifugal force which interacts with the force of attraction of the wind wheel. After the second separation, the light oil smoke of remaining part contacts the outermost end of eaves portion structure 13 earlier and gets into concentric tube 11 again when getting into concentric tube 11, and the centrifugal force of eaves portion structure 13 outermost end can leave some fluid or oil smoke particle area or block and get into concentric tube 11 inside and move outward, throws away with higher tangential velocity again, and the particle of throwing away can fall at cyclic annular piece 22, flows to oil collecting device 3 along cyclic annular piece 22 at last.
Fourth layer separation, inertial separation and centrifugal separation: after the third layer separation, the remaining oil smoke with lighter weight is simultaneously under the action of centrifugal force and attraction force, but the relative attraction force is greater than the centrifugal force. Some of the oil smoke will flow through the through holes 131 to the adjacent eaves 13, and due to inertia, the oil smoke and other oil smoke particles will be gathered into larger oil smoke particles and flow downward, and due to centrifugal force, the oil smoke particles will be thrown out at a higher tangential speed and finally flow along the ring-shaped pieces 22 to the oil collecting device 3.
Fifth layer separation, cyclonic centrifugal force and secondary vortex generation of concentric tubes 11: the inner wall of the concentric tube 11 rotates to form a cyclone, the concentric tube 11 is a low-pressure area, fluid or particles in the tube move towards the wall of the tube under the action of centrifugal force, the tube wall forms a high tangential velocity, and part of oil smoke is blocked from flowing upwards. In addition, the residual oil smoke can form vortex in the vortex generating device, and rotate without stopping, so that the oil smoke is captured and is not allowed to escape from the pipeline. After the attraction force and the centrifugal force are removed, the oil smoke which continuously rotates from the secondary vortex and moves at the pipe wall in a high tangent mode flows downwards along the inner pipe wall due to gravity and is collected to the oil collecting device 3.
The sixth layer is separated, the spoiler 111 is separated: the turbulence device 111 at one end of the concentric tube 11 generates flow field separation on the remaining oil smoke, and by means of the flow field separation, part of the oil smoke is blocked by instability of the flow field and does not flow upwards or capture the oil smoke by a self-rotating vortex.
Seventh layer separation, wind wheel centrifugal separation: after the first six layers of separation, a small amount of very light oil smoke particles are left to be sucked into the wind wheel of the air draft assembly 5 due to pressure difference, the rotating wind wheel forms centrifugal force to throw the remaining small amount of oil smoke particles onto the inner wall of the fan, and finally nearly clean gas is discharged outside through the air outlet.
This lampblack absorber that can increase pressure difference through the diameter of injecing concentric tube 11 both ends and the distance of lower adjacent concentric tube 11, just can mention the pressure difference between inside and the external environment, reaches the improvement oil absorption effect. This oil smoke separator 1 of lampblack absorber that can increase pressure differential still produces additional centrifugal force to oil smoke gas, can effectively desorption oil smoke particle, can avoid containing a large amount of oil smoke particle gas and wind wheel contact, improves oil smoke particle's separation effect greatly and reduces because of the noise that the wind wheel accumulation oil stain produced.
Example 2.
A lampblack absorber that can increase pressure differential, other characteristics are the same as embodiment 1, the difference lies in: n =4 in the present embodiment, i.e., 4 concentric tubes 11 in the present embodiment are provided. In this embodiment, m =2, that is, the vortex generating device group 14 is provided in 2, one is provided in the 4 th concentric tube, and the other is provided in the 3 rd concentric tube. While the concentric tubes 11 of this embodiment correspond one-to-one to the eave structure 13.
This lampblack absorber that can increase pressure differential compares with embodiment 1, has increased a concentric tube 11, has also increased oil smoke separator 1 in the inside space volume of shell 2 to reduce the area of 11 air inlets of concentric tube, improve gaseous admission speed, increase the pressure differential of 11 inside and exterior spaces of concentric tube, thereby can improve the separation rate of oil smoke particle.
Example 3.
A lampblack absorber that can increase pressure differential, other characteristics are the same as embodiment 1, the difference lies in: the concentric tubes 11 of this embodiment correspond one-to-one to the eave structures 13.
Compared with the embodiment 1, the whole weight of the oil fume separator 1 can be reduced, so that the bearing requirement of the range hood is met, the load of parts is reduced, and the service life of the range hood is prolonged.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides a can increase lampblack absorber of pressure differential which characterized in that: the range hood is provided with a range hood main body and an oil smoke separator which can generate centrifugal force to separate oil smoke particles, and the oil smoke separator is assembled in the range hood main body in a transmission way;
the oil smoke separator is provided with a plurality of concentric tubes with coincident center axes, a rotating shaft and a plurality of eaves structures, the rotating shaft is fixedly connected with one end of each concentric tube, the eaves structures are arranged in a surrounding manner and fixedly arranged at the other end of the corresponding concentric tube and fixedly connected with the corresponding concentric tube, and the rotating shaft is in transmission connection with a motor of the cigarette machine main body;
the diameter of one end of the same concentric tube is defined as D 1 And the diameter of the other end is defined as D 2 And D is 2 ≤D 1 ；
The concentric tubes are provided with turbulence devices, and the turbulence devices are connected to the tail ends of one ends of the concentric tubes in a seamless surrounding manner;
defining one side, facing the ground when the range hood is installed, of the range hood as the lower side, wherein the range hood is also provided with an eddy current generating device set, the eddy current generating device set is fixedly installed on the outer surface of the concentric pipe and surrounds the joint of the eaves structure and the concentric pipe, and the eddy current generating device set is installed on the upper surface of the eaves structure;
each vortex generating device group consists of one or more vortex generating sub-devices in the same eaves structure.
2. A range hood according to claim 1, characterized in that: the 1.4D 2 ≤D 1 。
3. A range hood according to claim 2, wherein: defining the minimum distance from the outer wall of the end part of one end of the same concentric tube to the outer wall of the adjacent concentric tube in the axial direction as E 1 E is defined as the minimum distance from the outer wall of the end of the other end of the concentric tube to the outer wall of the adjacent concentric tube in the axial direction 2 ，E 2 ≥0.4E 1 。
4. A range hood capable of increasing a pressure differential as set forth in claim 3, wherein: the concentric tube is formed by a line segment consisting of a plurality of broken lines surrounding the center shaft for one circle, and the intersection position of two adjacent line segments on the inner wall of the concentric tube is a vortex generation position.
5. A range hood capable of increasing a pressure differential as set forth in claim 4, wherein: sequentially defining concentric tubes from the middle axis to the outside as a 1 st concentric tube, an i th concentric tube, an n-1 st concentric tube and an n th concentric tube, wherein i is more than or equal to 2 and less than or equal to n, and n is a positive integer;
height of No. 1 concentric tube is H 1 The height of the ith concentric tube is H i Said n-1 concentric tubes have a height H n-1 The height of the n-th concentric tube is H n ，H 1 Has the maximum value of H n The value of (d) is minimal;
the 1.1H n ≤H i ≤10H n And 0.5H i-1 ≤H i ≤3H i-1 ；
Height H of the 1 st concentric tube 1 Not more than 1m.
6. A range hood capable of increasing a pressure difference according to claim 5, wherein: the eaves structure is provided with a plurality of through-holes.
7. A range hood capable of increasing a pressure differential as set forth in claim 6, wherein: the vortex generating device groups are arranged in number m, wherein m is any positive integer larger than 0, and the m vortex generating device groups are respectively and fixedly arranged on the outer surface of the concentric tube and surround the connection part of the eaves part structure and the concentric tube.
8. A range hood capable of increasing a pressure differential as set forth in claim 7, wherein: the other end of the concentric tubes is fixedly connected with at least one eaves structure.
9. A range hood according to any one of claims 1 to 8 capable of increasing a pressure differential, characterized in that: the range hood main body is provided with a shell, an air draft assembly and an oil collecting device, the oil smoke separator is rotatably arranged inside the shell, the air draft assembly is fixedly assembled inside the shell and positioned above the oil smoke separator, and the oil collecting device is assembled at the bottom of the shell;
the shell is provided with a plurality of shell air inlets and annular sheets matched with the plurality of shell air inlets, the annular sheets are fixedly installed or integrally connected to the corresponding inner surface of the shell and positioned at the edges of the shell air inlets, and the annular sheets correspond to the shell air inlets one to one;
the air draft assembly is provided with a fan, a wind wheel and a volute, the fan is assembled inside the volute, the wind wheel is in transmission connection with the fan, the volute is fixedly installed inside the cigarette machine main body, an air inlet of the volute is communicated with an air outlet above the concentric pipe, and an air outlet of the volute is communicated with an air outlet of the cigarette machine main body;
the shell is a spherical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810188650.1A CN108167906B (en) | 2018-03-07 | 2018-03-07 | Range hood capable of increasing pressure difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810188650.1A CN108167906B (en) | 2018-03-07 | 2018-03-07 | Range hood capable of increasing pressure difference |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108167906A CN108167906A (en) | 2018-06-15 |
| CN108167906B true CN108167906B (en) | 2023-01-03 |
Family
ID=62511838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810188650.1A Active CN108167906B (en) | 2018-03-07 | 2018-03-07 | Range hood capable of increasing pressure difference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108167906B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2210448A (en) * | 1987-09-30 | 1989-06-07 | Tiong Ee Ong | Cooker hood with oil extraction |
| US5395410A (en) * | 1993-12-21 | 1995-03-07 | Jang; Sun-Sing | Fume exhauster |
| CN2348289Y (en) * | 1998-10-28 | 1999-11-10 | 卞应元 | Cooking fume collecting air exhauster |
| CN205842814U (en) * | 2016-07-14 | 2016-12-28 | 黄震 | A kind of smoke exhaust ventilator reducing environmental pollution |
-
2018
- 2018-03-07 CN CN201810188650.1A patent/CN108167906B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2210448A (en) * | 1987-09-30 | 1989-06-07 | Tiong Ee Ong | Cooker hood with oil extraction |
| US5395410A (en) * | 1993-12-21 | 1995-03-07 | Jang; Sun-Sing | Fume exhauster |
| CN2348289Y (en) * | 1998-10-28 | 1999-11-10 | 卞应元 | Cooking fume collecting air exhauster |
| CN205842814U (en) * | 2016-07-14 | 2016-12-28 | 黄震 | A kind of smoke exhaust ventilator reducing environmental pollution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108167906A (en) | 2018-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108317567B (en) | Oil-proof non-planar range hood | |
| CN108253491B (en) | Range hood with oil smoke separating function shell | |
| CN108224527B (en) | Range hood capable of quickly removing oil smoke particles | |
| CN108167906B (en) | Range hood capable of increasing pressure difference | |
| CN108167898B (en) | Range hood with rotatable oil smoke separator | |
| CN108167904B (en) | Inside air current evenly distributed formula lampblack absorber | |
| CN108253496B (en) | Oil smoke is centrifugal separation formula lampblack absorber many times | |
| CN108253497B (en) | Range hood with oil smoke separator | |
| CN108151102B (en) | Spherical range hood with oil fume separator | |
| CN108253489B (en) | Range hood with multiple oil smoke separation functions | |
| CN108302583B (en) | Range hood with attractive force greater than centrifugal force | |
| CN108253490B (en) | Range hood with oil smoke separator | |
| CN108266771B (en) | Range hood with oil smoke separation assembly | |
| CN108167905B (en) | Double-centrifugal combined range hood | |
| CN108167897B (en) | Range hood capable of improving absorption capacity through speed regulation | |
| CN208253676U (en) | A kind of kitchen ventilator of multiple oil suction, multiple de-oiling | |
| CN108266772B (en) | Thin eaves formula lampblack absorber | |
| CN108253500B (en) | Range hood with detachable shell | |
| CN108253495B (en) | Range hood capable of improving pressure difference | |
| CN108302581B (en) | Range hood with light, oil-resistant and high-temperature-resistant oil-fume separator | |
| CN108443924B (en) | Range hood with non-planar filter | |
| CN108253492B (en) | Multiple lampblack absorber of getting rid of oil smoke | |
| CN208154551U (en) | A kind of kitchen ventilator with various temperature field oil smoke subassembly | |
| CN208431827U (en) | A kind of kitchen ventilator of multiple vortex separation oil smoke | |
| CN108266770B (en) | Range hood with oil smoke subassembly in various temperature fields |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |