CN210568694U - Range hood with good smoking effect - Google Patents
Range hood with good smoking effect Download PDFInfo
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- CN210568694U CN210568694U CN201920968968.1U CN201920968968U CN210568694U CN 210568694 U CN210568694 U CN 210568694U CN 201920968968 U CN201920968968 U CN 201920968968U CN 210568694 U CN210568694 U CN 210568694U
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Abstract
The utility model discloses an effectual lampblack absorber of smoking, include: an air duct volute provided with an impeller, a Venturi tube and a smoke exhaust pipe; the venturi air inlet is connected with an air channel outlet of the air channel volute, a smoke exhaust pipe is arranged above the venturi air outlet, the diameter of the venturi air outlet is smaller than that of the air channel outlet, the diameter of the smoke exhaust pipe air inlet adjacent to the venturi is larger than that of the venturi air outlet, and a gap exists between the venturi air inlet and the smoke exhaust pipe air inlet. This lampblack absorber, through the venturi who installs in the wind channel exit of wind channel spiral case and the cooperation of installing the pipe of discharging fume above venturi, the flue gas is inhaled behind the wind channel spiral case, the diameter of flowing through is by the venturi that diminishes greatly, the velocity of flow of flue gas increases, high-speed fluid flows through the back, form the negative pressure in the pipe air intake department of discharging fume, flue gas in with the surrounding environment inhales from the kneck of venturi with the pipe of discharging fume, discharge fume pipe after mixing with the absorptive flue gas of fan main part, the oil absorption cigarette effect of lampblack absorber has been promoted.
Description
Technical Field
The utility model relates to an effectual lampblack absorber of smoking.
Background
The range hood becomes an indispensable kitchen appliance, is arranged above a kitchen stove, can quickly pump away waste burnt by the stove and oil smoke harmful to human bodies generated in the cooking process, and discharges the oil smoke out of a room, thereby reducing the pollution of the oil smoke to the kitchen and achieving the effect of purifying the air in the kitchen.
Along with the improvement of the requirements of people on the life quality, the air purification degree of a kitchen is higher, and therefore the oil smoke absorption effect of the range hood is higher. The oil smoke machine on the market generally adopts centrifugal fan to carry out the row of inhaling to the oil smoke, in order to increase the oil smoke absorption effect, the mode of taking at present is that the structural dimension of increase fan and the performance of adjustment fan itself, and the manufacturing cost and the great energy consumption of fan have just so greatly increased, have wasted the resource.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model aims to provide an effectual lampblack absorber of smoking promotes its oil absorption cigarette effect under the condition that does not change original fan mechanism and fan performance itself.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
a range hood with good smoking effect comprises: an air duct volute provided with an impeller, a Venturi tube and a smoke exhaust pipe; the venturi air intake with the wind channel exit linkage of wind channel spiral case, the top installation of venturi air outlet the pipe of discharging fume, the diameter of venturi air outlet is less than the diameter of wind channel export, it is neighbouring venturi's the diameter of tub air intake of discharging fume is greater than the diameter of venturi air outlet, the venturi air intake with there is the clearance in the pipe air intake of discharging fume.
Furthermore, the diameter of the air inlet of the venturi tube is smaller than or equal to the diameter of the outlet of the air duct.
Furthermore, the Venturi tube comprises a throat tube and a reducing tube which are connected with each other, the throat tube is a cylindrical tube, and the diameter of the throat tube is the same as that of the air outlet of the Venturi tube; and the reducing pipe is gradually contracted from the air inlet of the Venturi tube to the air outlet of the Venturi tube until the reducing pipe is contracted to be the same as the diameter of the air outlet of the Venturi tube and then connected with the throat pipe.
Furthermore, the part of the throat pipe extending into the air inlet of the smoke exhaust pipe is a cylindrical pipe, and the axis of the smoke exhaust pipe is superposed with the axis of the throat pipe.
Furthermore, the venturi tube is along the longitudinal section of the axis, and the included angle formed by two side lines of the side wall of the reducer is 0.5-1 rad.
Furthermore, the throat pipe extends into the air inlet of the smoke exhaust pipe, and the extending distance of the throat pipe is 0.4-0.8 of the length of the throat pipe.
Further, the distance between the air outlet of the throat pipe and the air outlet of the smoke exhaust pipe is 0.3-0.7 of the length of the smoke exhaust pipe.
Further, the ratio of the diameter of the throat pipe to the diameter of the outlet of the air duct is 0.3-0.7.
Further, the ratio of the length of the throat pipe to the diameter of the outlet of the air duct is 1-1.5.
Furthermore, the side wall of the smoke exhaust pipe is an arc-shaped surface, and the side wall in the middle of the smoke exhaust pipe is sunken towards the axis of the smoke exhaust pipe.
The utility model discloses a range hood, through the venturi of installing in the wind channel exit of wind channel spiral case and the cooperation of installing the pipe of discharging fume in the venturi top, the flue gas is inhaled behind the wind channel spiral case, the diameter of flowing through is by the venturi that diminishes greatly, the velocity of flow of flue gas increases, high-speed fluid flows through the back, form the negative pressure in the pipe air intake department of discharging fume, the flue gas in with the surrounding environment inhales from venturi and the kneck of discharging fume the pipe, discharge fume the pipe after mixing with the absorptive flue gas of fan main part, on the basis of carrying out the tradition and discharging fume, through the cooperation of venturi air outlet and the pipe air intake of discharging fume, the flue gas in the surrounding environment has additionally been absorbed in other words and its discharge.
The utility model discloses among the preferred technical scheme, through stretching into the partly of venturi's choke and discharging fume the pipe, avoid the oil smoke in the wind channel to reveal from the choke air outlet.
The utility model discloses among the further preferred technical scheme, the part that the choke stretched into the pipe air intake of discharging fume is cylindrical pipe, and the axis coincidence of the pipe of discharging fume and choke to the oil smoke in the surrounding environment when drawing through the venturi effect, can guarantee to carry out even absorption to the flue gas in the surrounding environment.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic view of the installation structure of the air duct volute, impeller, venturi tube and smoke exhaust pipe in FIG. 1;
FIG. 3 is a schematic cross-sectional view of FIG. 2;
FIG. 4 is a schematic view of an installation structure of an air duct volute, an impeller, a Venturi tube and a smoke exhaust tube according to a second embodiment of the present invention;
FIG. 5 is a schematic view of an installation structure of an air duct volute, an impeller, a Venturi tube and a smoke exhaust tube according to a third embodiment of the present invention;
in the figure:
1-air duct volute; 11-air duct outlet
2-an impeller;
3-venturi tube; 31-a throat; 32-a reducer;
4, a smoke exhaust pipe.
Detailed Description
To clearly illustrate the design concept of the present invention, the following description is made with reference to the examples.
In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the examples of the present invention, and it is obvious that the described examples are only a part of examples of the present invention, and not all examples. Based on the middle examples of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
In the description of the present embodiment, the terms "upper", "lower", "front", "rear", "left", "right", 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 in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely to distinguish similar items and are not to be construed as requiring a particular order or sequence, and it is to be understood that such use is intended to be interchangeable where appropriate.
As shown in fig. 1 to 3, the present example provides a range hood having a good smoking effect, the range hood including: an air duct volute 1 provided with an impeller 2, a Venturi tube 3 and a smoke exhaust pipe 4; the venturi air inlet is connected with an air duct outlet 11 of the air duct volute, a smoke exhaust pipe 4 is arranged above the venturi air outlet, the diameter of the venturi air outlet is smaller than that of the air duct outlet 11, the diameter of the smoke exhaust pipe air inlet adjacent to the venturi 3 is larger than that of the venturi air outlet, and a gap exists between the venturi air inlet and the smoke exhaust pipe air inlet.
The smoke exhauster of the example is characterized in that through the matching of the Venturi tube 3 arranged at the air duct outlet 11 of the air duct volute 1 and the smoke exhaust tube 4 arranged above the Venturi tube, smoke flows through the Venturi tube 3 with the diameter being reduced from large to small after being sucked into the air duct volute 1, the flow velocity of the smoke is increased, negative pressure is formed at the air inlet of the smoke exhaust tube after high-speed fluid flows through the Venturi tube, the smoke in the surrounding environment is sucked from the interface of the Venturi tube 3 and the smoke exhaust tube 4 (the direction indicated by arrows in figures 1 and 3 is the suction direction of smoke), the smoke is mixed with the smoke absorbed by the main body of the fan and then is exhausted out of the smoke exhaust tube 4, on the basis of traditional smoke exhaust, the smoke in the surrounding environment is additionally absorbed through the matching of the air outlet of the Venturi tube and the air inlet of the smoke exhaust tube, namely, on the basis of traditional smoke exhaust, a smoke absorption mode is added, and under, the oil smoke absorption effect of the range hood is improved, and the structure is simple to arrange and easy to realize.
When the device is installed, the gap between the venturi air inlet and the air inlet of the smoke exhaust pipe comprises the following three conditions: the venturi tube air outlet and the smoke exhaust pipe air inlet are axially spaced, the venturi tube air outlet and the smoke exhaust pipe air inlet can also be just in the same radial plane, and the venturi tube air outlet can also partially extend into the smoke exhaust pipe air inlet, so that the venturi effect can be generated under the three conditions, and the purpose of injecting and absorbing oil smoke is achieved.
The oil smoke in the surrounding environment is absorbed through the venturi effect generated by the cooperation of the venturi tube and the smoke exhaust pipe, wherein the structure of the venturi tube and the smoke exhaust pipe can be various and is not limited to the structure provided in the embodiment.
The utility model discloses use the side to inhale the formula lampblack absorber and explain as the example, however, the utility model discloses a structure also can be applied to in the vertical lampblack absorber and produce the same technological effect.
Example 1
In this embodiment, as shown in fig. 1 to 3, the diameter of the air inlet of the venturi tube is smaller than or equal to the diameter D of the air outlet 11, so that when oil smoke flows through the venturi tube 3, a large flow velocity is more easily generated, thereby injecting and absorbing the oil smoke in the environment.
The venturi tube 3 comprises a throat tube 31 and a reducing tube 32 which are connected with each other, the throat tube 31 is a cylindrical tube, the diameter d of the throat tube 31 is equal to the diameter of the air outlet of the venturi tube, and the reducing tube 32 gradually shrinks from the air inlet of the venturi tube to the air outlet of the venturi tube until the reducing tube shrinks to be connected with the throat tube 31 when the diameter of the reducing tube is the same as the diameter of the air outlet of the venturi tube. At the moment, the air inlet of the reducing pipe is the air inlet of the Venturi tube, and the air inlet of the throat pipe is the air outlet of the Venturi tube. The throat 31 extends into the air inlet of the smoke exhaust pipe, and the extending distance of the throat 31 is the length L of the throat 3110.4-0.8, a part of the throat 31 is extended into the smoke exhaust pipe 4 to avoidThe oil smoke absorbed into the air duct by the fan body leaks from the gap between the throat pipe 31 and the smoke exhaust pipe 4. When the throat 31 extends into the throat for a distance less than the length L of the throat 3110.4, the leakage-preventing effect is not obvious, and when the throat 31 extends into the space longer than the length L of the throat 311And when the pressure is 0.8, the length of an injection passage between the throat pipe 3 and the smoke exhaust pipe 4 is long, so that the absorption of oil smoke in the surrounding environment is not facilitated.
As shown in figure 3, the air inlet of the smoke exhaust pipe and the air outlet of the smoke exhaust pipe are formed by cylindrical pipes with the same structure, the middle part of the smoke exhaust pipe 4 is a cylindrical pipe with the diameter smaller than that of the air inlet of the smoke exhaust pipe and the air outlet of the smoke exhaust pipe, and the axes of the smoke exhaust pipe 4 and the throat pipe 31 are overlapped. The ejection channels between the smoke exhaust pipe 4 and the throat pipe 31 are circumferentially and uniformly symmetrical, and when oil smoke in the surrounding environment is ejected through the Venturi effect, the smoke in the surrounding environment can be uniformly absorbed.
Distance L from air outlet of throat pipe to air outlet of smoke exhaust pipe2Is the length L of the smoke exhaust pipe 430.3 to 0.7, namely the length L of the smoke exhaust pipe 43The length L of the smoke discharge pipe 4 is obtained by subtracting the distance that the throat pipe 31 extends into the smoke discharge pipe 430.3 to 0.7. Here primarily for defining the length L of the flue gas duct 43. Length L of smoke exhaust pipe 43Need not be too long and can be connected with a common flue, however, the length L of the smoke exhaust pipe 43Too short, be unfavorable for drawing to penetrate absorptive oil smoke and the absorptive oil smoke of fan body mixes and discharges fume pipe 4 jointly.
The venturi tube is along the longitudinal section of its axis, and the included angle theta formed by two sidelines of the side wall of the reducer 32 is 0.5-1 rad. When theta is less than 0.5rad, the injection effect on the oil smoke is not obvious, and when theta is greater than 1rad, the diameter d of the throat pipe 31 is small, so that the injection of the absorbed oil smoke and the emission of the oil smoke absorbed by the fan body are not facilitated.
The ratio of the diameter D of the throat 31 to the diameter D of the air duct outlet is 0.3-0.7. The oil fume is also ensured to be easily discharged from the smoke exhaust pipe 4 while the injection effect is ensured.
Length L of throat 311The ratio of the diameter D of the air duct outlet to the diameter D of the air duct outlet is 1-1.5. The adaptation of the length of the throat 31 is performed by the duct outlet diameter D, based on the definition of the above-mentioned respective parametersThe design guarantees good smoke evacuation effect and draws the effect.
Example 2
As shown in fig. 4, this embodiment is an improvement based on the technical solution of embodiment 1, and is different from embodiment 1 in that the side wall of the smoke discharge pipe 4 is an arc-shaped surface, and the side wall of the middle part of the smoke discharge pipe 4 is concave toward the axis thereof.
Example 3
As shown in fig. 5, this embodiment is an improvement based on the technical solution of embodiment 1, and is different from embodiment 1 in that the longitudinal section of the smoke exhaust pipe 4 is trapezoidal, and the diameter of the smoke exhaust pipe gradually increases from the air inlet of the smoke exhaust pipe to the air outlet of the smoke exhaust pipe.
It is noted that some of the structures may be selected differently than the specific examples given above. The venturi may not include a throat; and the like, which can be made by those skilled in the art based on their basic skills based on an understanding of the inventive concept, and are not to be taken as an example herein.
Finally, it is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention, and these changes and modifications are to be considered as the protection scope of the invention.
Claims (10)
1. The utility model provides an effectual lampblack absorber of smoking which characterized in that includes: an air duct volute provided with an impeller, a Venturi tube and a smoke exhaust pipe; the venturi air intake with the wind channel exit linkage of wind channel spiral case, the top installation of venturi air outlet the pipe of discharging fume, the diameter of venturi air outlet is less than the diameter of wind channel export, it is neighbouring venturi's the diameter of tub air intake of discharging fume is greater than the diameter of venturi air outlet, the venturi air intake with there is the clearance in the pipe air intake of discharging fume.
2. The range hood with good smoking effect according to claim 1, wherein the diameter of the air inlet of the venturi tube is smaller than or equal to the diameter of the outlet of the air duct.
3. The range hood with good smoking effect according to claim 1 or 2, wherein the venturi tube comprises a throat tube and a reducer which are connected with each other, the throat tube is a cylindrical tube, and the diameter of the throat tube is the same as that of the air outlet of the venturi tube; and the reducing pipe is gradually contracted from the air inlet of the Venturi tube to the air outlet of the Venturi tube until the reducing pipe is contracted to be the same as the diameter of the air outlet of the Venturi tube and then connected with the throat pipe.
4. The range hood with good smoking effect according to claim 3, wherein the part of the throat pipe extending into the air inlet of the smoke exhaust pipe is a cylindrical pipe, and the axis of the smoke exhaust pipe is overlapped with that of the throat pipe.
5. A range hood with a good smoking effect according to claim 3, wherein the venturi tube is provided with an included angle of 0.5-1 rad along the longitudinal section of the axial line of the venturi tube and two side lines of the side wall of the reducer.
6. The range hood with a good smoking effect according to claim 3, wherein the throat pipe extends into the air inlet of the smoke exhaust pipe, and the extending distance of the throat pipe is 0.4-0.8 of the length of the throat pipe.
7. The range hood with a good smoking effect according to claim 6, wherein the distance from the air outlet of the throat pipe to the air outlet of the smoke exhaust pipe is 0.3-0.7 of the length of the smoke exhaust pipe.
8. The range hood with a good smoking effect according to claim 7, wherein the ratio of the diameter of the throat pipe to the diameter of the outlet of the air duct is 0.3-0.7.
9. The range hood with a good smoking effect according to claim 8, wherein the ratio of the length of the throat pipe to the diameter of the outlet of the air duct is 1-1.5.
10. The range hood with good smoking effect according to claim 1, wherein the side wall of the smoke exhaust pipe is an arc-shaped surface, and the side wall in the middle of the smoke exhaust pipe is concave towards the axis of the smoke exhaust pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920968968.1U CN210568694U (en) | 2019-06-26 | 2019-06-26 | Range hood with good smoking effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920968968.1U CN210568694U (en) | 2019-06-26 | 2019-06-26 | Range hood with good smoking effect |
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| Publication Number | Publication Date |
|---|---|
| CN210568694U true CN210568694U (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920968968.1U Active CN210568694U (en) | 2019-06-26 | 2019-06-26 | Range hood with good smoking effect |
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| CN (1) | CN210568694U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285457A (en) * | 2019-06-26 | 2019-09-27 | 杭州老板电器股份有限公司 | A kind of kitchen ventilator that smoking effect is good |
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2019
- 2019-06-26 CN CN201920968968.1U patent/CN210568694U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285457A (en) * | 2019-06-26 | 2019-09-27 | 杭州老板电器股份有限公司 | A kind of kitchen ventilator that smoking effect is good |
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