TWI408317B - Range hood with anti-disturbing airflow capability - Google Patents

Abstract

A range hood capable of resisting draft is provided above a counter on the top of which an air-generation device is located. The range hood comprises an air-extraction hood that has a bottom provided with an elongate air-extraction slot for drawing air upwards. Besides, an air blow groove is provided in front of the elongate air-extraction slot for blowing air downwards. A long left upright plate and a long right upright plate are respectively provided below the left and right lateral surfaces of the air-extraction hood. Thereby, when the elongate air-extraction slot draws in air, an oblique airflow is formed. Besides, the long left and right upright plates are able to hinder the draft coming from lateral sides, so as to protect the oblique airflow structure. Consequently, an intact upwards-flowing airflow is formed to exhaust soot and harmful gases.

Description

Range hood with anti-disturbing airflow capability

The invention relates to a range hood, in particular to a disturbing airflow from all directions, to eliminate soot pollutants, and to be suitable for use in a home kitchen, a restaurant, and other workplaces that generate polluting gases.

The "traditional kitchen range hood" is not much different from the top suction hood generally used in the workplace. In such a range hood, within a short distance below the suction port, the velocity of the fluid upwards has become small, and the upward suction force is insufficient, so that it is highly susceptible to movement, fan or air-conditioning. The effects of disturbing airflows reduce the effective soot trapping area to a very small extent. In this way, the soot that is in close proximity to the suction port will escape with the flow of the disturbing airflow, which is harmful to the health of the kitchen cook.

Therefore, the inventors have developed an exhaust device having an "air curtain" using the principle of gas dynamics to overcome the above problems. The main technical content is that the front side of the flow table is provided with a flow of air blown back obliquely upwards, and a slit-shaped air hood is arranged above the furnace table, so that the left and right sides of the table top are completely emptied as a supplement. The use of gas, and the blowing, sucking airflow to form a nearly two-dimensional air curtain. And this flow field conforming to the aerodynamic principle will cause the soot and toxic gas between the oblique air curtain and the rear wall to be discharged to the upper suction hood stably stabilized by the air flow.

When implemented, the above-mentioned exhaust device can effectively remove and block soot and harmful gases without strongly disturbing the airflow, and can move people in front of the flow table and slightly disturb the airflow (about 20 cm/s). The leakage caused by the following disturbance speeds is minimized. Only the exhaust The device draws in air through the unobstructed space on the left and right sides of the table top to form a two-dimensional air curtain facing the cook. Therefore, although it can form a strong blocking effect on the interference airflow in front of the flow table, it is difficult to completely exclude other slightly strong disturbance airflows from all sides in the kitchen space, for example, the blowing of the electric fan, or the outside of the door and the window. The inflowing air will make the disturbed airflow in the kitchen space quite complicated, and when the disturbing airflow acts on the left and right sides of the table top, the left and right sides of the table top are emptied to serve as the air supply space. The disturbing airflow from the lateral direction will destroy the air curtain structure through the air supply space, and the ability to remove the oil smoke is greatly reduced. According to the experimental results of the Taiwan University of Science and Technology, when the velocity of the disturbed airflow is greater than about 20 cm/s, the conventionally-discharged conventional range hoods show serious leakage, and the two-dimensional air curtain type exhaust fumes also have leakage. phenomenon. However, the perturbation airflow that is common in kitchens is difficult to expect and control at a small speed range, so the soot drift is quite serious.

Furthermore, since the above-described two-dimensional air curtain type exhaust fumes must be equipped with a device for blowing and exhausting at the same time, it is rather troublesome in replacement or installation work, and the equipment and labor costs are relatively increased.

In view of this, in order to provide a structure different from the conventional technology, and to improve the above-mentioned shortcomings, the exhaust hood can block the disturbing airflow from all directions to effectively remove the soot and harmful gases, and the inventors have accumulated many years of experience and continuous R&D improvements have resulted in the creation of the present invention.

The main object of the present invention is to provide a range hood having an anti-disturbing airflow capability, which is provided with an elongated suction port at the bottom of the suction hood, and is respectively provided on the left side and the right side of the suction hood. The structure of the slab, the raft can block the disturbing airflow from the lateral direction, so as to form a complete upward guiding airflow to eliminate the soot and harmful gases.

A secondary object of the present invention is to provide a range hood having anti-disturbing airflow capability by sucking The left and right sides of the hood are respectively provided with elongated vertical plates, and the front ends of the two vertical plates are respectively provided with a flow-conducting structure, so that the air can enter the space under the suction hood from the front end of the vertical plate. The recirculation zone formed by separating the fluid from the front end faces of the left and right vertical plates can be reduced to ensure a smooth exhaust gas flow.

For the purpose of the above invention, the rear end face of the range hood having the anti-disturbing airflow capability of the present invention is mounted on a wall and located above a platform, and an exhaust device is arranged on the platform surface of the platform. The range hood includes a suction hood, an elongated left vertical panel, and an elongated right vertical panel. Wherein, the bottom of the suction hood is provided with an elongated and downwardly facing suction port, the elongated suction port is in communication with an air suction device for drawing upward air; and the elongated suction port is disposed in the suction hood Between the front end surface and the rear end surface, parallel to the front end surface and the rear end surface; the elongated left vertical plate is fixed below the left side surface of the suction hood, and the horizontal width of the elongated left vertical plate is not less than the rear of the exhaust device The horizontal distance between the edge and the wall, the length of the elevation of the elongated left vertical plate is not less than the height of the platform to the bottom end of the elongated left vertical plate; and the elongated right vertical plate is fixed below the right side of the suction hood, The horizontal width of the elongated right vertical panel is not less than the horizontal distance between the trailing edge of the exhaust device and the wall, and the length of the elevation of the elongated right vertical panel is not less than the height of the platform to the bottom end of the elongated right vertical panel.

In implementation, the right front end of the left vertical plate is provided with an arc-shaped first flow guiding portion, and the left side of the front vertical plate is provided with an arc-shaped second flow guiding portion.

In implementation, when the range hood having the anti-disturbing airflow capability of the present invention is directly suspended above a platform, the narrow suction port of the range hood is disposed at the front end surface and the rear end surface of the suction hood The intermediate position; the horizontal width of the elongated left vertical plate is not less than the horizontal width of the left side surface of the 1/4 suction hood, and the horizontal width of the elongated right vertical plate is not less than the horizontal width of the left side surface of the l/4 suction hood, In order to cover the left and right sides of the exhaust device.

In order to facilitate a more in-depth understanding of the present invention, it is described in detail later:

1‧‧‧Exhaust hood

11‧‧‧ wall

12‧‧‧ platform

13‧‧‧Exhaust device

131‧‧‧ trailing edge

132‧‧‧ leading edge

2‧‧‧ suction hood

21‧‧‧Wind box

211‧‧‧ Space

212‧‧‧floor

213‧‧‧ oil retaining frame

214‧‧‧ entrance

22‧‧‧Exhaust port

23‧‧‧ front end

24‧‧‧ rear end face

25‧‧‧ oil storage box

26‧‧‧Exhaust device

27‧‧‧First air supply space

28‧‧‧Second air supply space

29‧‧‧ Third air supply space

30‧‧‧ Fourth qi space

3‧‧‧Long left vertical board

31‧‧‧First Drainage Department

311, 411‧‧ ‧ separation point

4‧‧‧Long-shaped right vertical board

41‧‧‧Second diversion

5, 6‧‧‧ blowing end

51, 61‧‧‧ blowing mouth

52‧‧‧Blowers

53, 62‧‧‧ air curtain

Fig. 1 is a perspective view showing the stereoscopic appearance of the first embodiment of the present invention installed above the platform.

Figure 2 is a schematic cross-sectional view of a first embodiment of the present invention mounted on a wall.

Figures 3 and 4 are schematic cross-sectional views showing another shape of the wind collecting box of the present invention. .

Figure 5 is a side view of the first embodiment of the present invention when it is exhausted.

Figure 6 is a plan view of the first embodiment of the present invention when it is exhausted.

Figure 7 is a side view of the second embodiment of the present invention when it is exhausted.

Figure 8 is a side view of a third embodiment of the present invention.

Figure 9 is a side view of the third embodiment of the present invention when it is exhausted.

Referring to Figures 1 and 2, which is a first embodiment of the range hood 1 having anti-disturbing airflow capability, the rear end face is mounted on a wall 11 and located above a platform 12, A burner is arranged on the surface of the platform 12, and a pot is arranged above the burner. The burner is provided as an exhausting device 13, wherein the side of the exhausting device 13 facing the wall 11 is defined as a trailing edge 131. The side opposite the trailing edge 131 and away from the wall 11 is defined as the leading edge 132. In practice, the venting device 13 can also include a pan or other appliance that can generate hazardous gases. The range hood 1 includes a suction hood 2, an elongated left vertical plate 3, and an elongated right vertical plate 4.

The air hood 2 includes a wind collecting box 21, which is a substantially rectangular housing, and a space 211 is formed therein. The bottom plate 212 of the wind collecting box 21 is provided with a narrow and open downward. The suction port 22, the elongated suction port 22 is located between the front end face 23 and the rear end face 24 of the suction hood 2, and is parallel to the front end face 23 and the rear end face 24. An oil retaining frame 213 is disposed on the surface of the bottom plate 212 of the wind collecting box 21, and the oil retaining frame 213 is protruded upward from the plate surface of the bottom plate 212, and is surrounded by the narrow suction port 22. An oil storage box 25 is disposed below the rear end of the bottom surface of the bottom plate 212 of the wind collecting box 21, and the oil storage box 25 may be disposed below or below the front end of the bottom surface of the bottom plate 212. In addition, the top surface of the wind collecting box 21 is connected to an air extracting device 26 via an air inlet 214, and the inlet 214 is offset from the narrow side. Directly above the elongated suction port 22. When implemented, the aspirator 26 is a fan, blower or other extractable fluid machine.

In implementation, the wind collecting box 21 may also be a substantially L-shaped housing, and as shown in FIG. 3, the elongated suction port 22 faces downward at an oblique angle; or as shown in FIG. 4, the elongated shape The air suction port 22 is directed away from the rear end surface 24 of the wind collecting box 21.

The elongated left vertical plate 3 has a substantially rectangular shape, and its top end is fixed below the left side surface of the wind collecting box 21 so as to extend downward from the lower side of the left side surface of the wind collecting box 21, and to make the elongated left vertical board 3 and the elongated long drawing. The port 22 is substantially vertical. The curved left first guide portion 31 is disposed on the right side of the front end of the elongated left vertical plate 3. The horizontal width W of the elongated left vertical plate 3 is not less than the level between the trailing edge 131 of the exhaust device 13 and the wall 11. The distance W1, that is, the elongated left vertical plate 3 at least blocks a portion of the left side surface of the exhaust device 13; and the elongated left vertical plate 3 has a facade length H that is not less than the top end of the platform 12 to the elongated shape The height H1 of the bottom end of the left vertical plate 3.

The elongated right vertical plate 4 and the elongated left vertical plate 3 are symmetrical to the left and right sides of the wind collecting box 21, and the top end of the elongated right vertical plate 4 is fixed below the right side surface of the wind collecting box 21, so that the set The lower side of the right side of the bellows 21 extends downward, and the elongated right vertical plate 4 is substantially perpendicular to the elongated suction port 22. In addition, an arc-shaped second flow guiding portion 41 is disposed on the left side of the front end of the elongated right vertical plate 4. The horizontal width of the elongated right vertical plate 4 is not less than between the trailing edge 131 of the exhaust device 13 and the wall 11. The horizontal distance, that is, the elongated right vertical plate 4 at least blocks a portion of the right side surface of the exhaust device 13, and the length of the elevation of the elongated right vertical plate 4 is not less than the top end of the platform 12 to the long right The height of the bottom end of the vertical plate 4.

In this way, the front end surface of the elongated left vertical plate 3 and the lower end of the left side surface of the suction hood 2 form a first rectangular air supply space 27, and the front end surface of the elongated right vertical plate 4 and the suction hood Below the front end of the right side surface of the second surface, a second rectangular air supply space 28 is formed. A substantially rectangular third air supply space 29 is formed between the bottom end of the left vertical plate 3 and the left side of the platform 12, and a rough outline is formed between the bottom end of the right vertical plate 4 and the right side of the platform 12. A rectangular fourth plenum space 30.

Thereby, as shown in FIGS. 5 and 6, when the present creation is fixed to the wall and the exhaust device 13 starts to generate soot or other harmful gas, the operation of the air extracting device 26 causes the elongated suction port 22 to start upward. Pumping, and by the high-speed suction of the narrow suction port 22, an oblique air flow is formed below the front end of the wind collecting box 21 to drive the oil smoke or other harmful gas generated by the exhaust device 13 to rise and pass. After the space 211 inside the wind box 21 is exhausted, it is discharged to the outside through the air suction device 26. Since the suction inlet 214 of the air extracting device 26 is offset directly above the elongated suction port 22, the accumulated waste oil will not directly fall down through the elongated suction port 22, but will adhere to the plate of the bottom plate 212. On the surface. Since the oil retaining frame 213 is framed around the narrow suction port 22 to block the waste oil from dripping downward from the suction groove 22, the waste oil flows downward into the oil storage box 25. Due to the blocking of the elongated left vertical plate 3 and the elongated right vertical plate 4, the disturbing airflow in the lateral direction can be resisted to prevent the oblique airflow structure from being destroyed, thereby forming a complete upward guiding airflow to eliminate Soot and harmful gases.

Furthermore, since the right side of the front end of the left vertical plate 3 is provided with a curved first flow guiding portion 31, the left side of the front end of the right vertical plate 4 is provided with an arc-shaped second flow guiding portion 41, so that when the air passes through the first supplement When the air space 27 and the second air supply space 28 enter the space below the wind collecting box 21, the separation points (311, 411) of the air fluid from the first flow guiding portion 31 and the second flow guiding portion 41 are delayed. In this way, the recirculation zone created by the air fluid can be reduced to ensure a smooth exhaust gas flow.

Please refer to FIG. 7 , which is a second embodiment of the present invention, which is different from the first embodiment in that the front end of the platform 12 is provided with an elongated blowing end 5 and an elongated blowing end 5 . An elongated air blowing port 51 corresponding to the elongated air suction port 22 is provided, and the elongated air blowing port 51 communicates with a blower 52 to allow the air blowing port 51 to eject the air jet upward at an oblique angle via the action of the air blower 52. The narrow air suction port 22 is inserted into the narrow suction port 22, and an oblique air curtain 53 is formed between the elongated air blowing port 51 and the elongated suction port 11. When implemented, the blower 52 can also be mechanically replaced by a cross flow fan or other fluid.

As shown in FIG. 8, it is a third embodiment of the present invention, which is different from the first and second embodiments in that the range hood is directly suspended above the platform 12 to make the suction hood 2 before and after the side is vented, the elongated suction port 22 is disposed at a middle position between the front end surface and the rear end surface of the suction hood 21, and the horizontal width W2 of the elongated left vertical plate 3 is not less than 1/4 suction hood The horizontal width W3 of the left side of 2 The horizontal width of the elongated right vertical plate 4 is not less than the horizontal width of the right side surface of the 1/4 suction hood 2, thereby covering the left and right side faces of the exhaust device 13. As shown in FIG. 9, the rear end of the platform 12 may be provided with another elongated blowing end 6, and the elongated blowing end 6 is provided with an elongated blowing port 61 corresponding to the elongated suction port 22. The elongated blowing port 61 is in communication with the blower 52. Thereby, when the elongated air blowing port 61 ejects the air jet upward at an oblique angle and enters the elongated suction port 22, another oblique air curtain 62 can be formed between the elongated blowing port 61 and the elongated suction port 22.

Thereby, whether there is a blower end (5, 6), or a blower end (5, 6) to produce an air curtain or two air curtains, the air flow can stably bring the soot or other harmful gas to the upper suction. The inside of the hood 2 is discharged outward through the action of the air suction device 26.

Therefore, the present invention has the following advantages:

1. The present invention draws air through a narrow-shaped suction port, and blocks the disturbing airflow from the lateral direction by the elongated left and right vertical plates, thereby forming a complete upward guiding airflow to eliminate the soot and harmful gas.

2. The present invention reduces the backflow bubble entering the space under the suction hood by the arc-shaped flow guiding portion provided at the front end of the elongated left and right vertical plates, thereby preventing the backflow bubble from protruding outward and allowing the soot to easily spread. It also affects the integrity of the airflow directed upwards to ensure a smoother exhaust airflow.

3. The invention adopts a combination of a narrow-shaped suction port and an elongated left and right vertical plates to form a complete upward guiding airflow, thereby eliminating oil smoke and harmful gases, and therefore, without replacing other kitchen utensils, It is quite convenient to use and install directly to replace the traditional type of range hood.

In summary, according to the above disclosure, the present invention can achieve the intended purpose of the invention, and provides an oil-discharged smoke capable of blocking the disturbing airflow from various directions to effectively remove the smoke and harmful gases with anti-disturbing airflow capability. Machine, the value of industrial use is very high, and the invention patent application is filed according to law.

1‧‧‧Exhaust hood

12‧‧‧ platform

13‧‧‧Exhaust device

131‧‧‧ trailing edge

132‧‧‧ leading edge

2‧‧‧ suction hood

21‧‧‧Wind box

213‧‧‧ oil retaining frame

214‧‧‧ entrance

22‧‧‧Exhaust port

23‧‧‧ front end

24‧‧‧ rear end face

27‧‧‧First air supply space

28‧‧‧Second air supply space

29‧‧‧ Third air supply space

30‧‧‧ Fourth qi space

3‧‧‧Long left vertical board

31‧‧‧First Drainage Department

4‧‧‧Long-shaped right vertical board

41‧‧‧Second diversion

Claims (8)

An exhaust hood having anti-disturbing airflow capability, the rear end face is mounted on a wall and located above the platform, and an exhaust device is arranged on the platform surface of the platform, the exhaust device is defined toward one side of the wall For the trailing edge, the range hood includes: a suction hood having a narrow opening and a downwardly facing suction port at the bottom, the elongated suction port being in communication with an air suction device for drawing air upward; and the elongated shape The air suction port is disposed between the front end surface and the rear end surface of the suction hood, and parallel to the front end surface and the rear end surface; an elongated left vertical plate is fixed under the left side surface of the suction hood, the elongated left vertical The horizontal width of the panel is not less than the horizontal distance between the trailing edge of the exhaust device and the wall, and the length of the elevation of the elongated left vertical panel is not less than the height of the platform to the bottom end of the elongated left vertical panel, and the left vertical panel The front end surface and the lower end of the left side surface of the suction hood form a first air supply space; and an elongated right vertical plate is fixed below the right side surface of the air suction hood, and the horizontal width of the long right vertical board is not less than The horizontal distance between the trailing edge of the exhaust to the wall, Facade of the right vertical plate-shaped length is not less than the height of the platform to the right bottom of the elongated vertical plate, the bottom line of the right side front end surface of the distal end of the hood and a right vertical plates forms a second space qi. The hood having the anti-disturbing airflow capability according to the first aspect of the invention, wherein the front end of the left vertical plate is provided with an arc-shaped first flow guiding portion, and the front end of the right vertical plate is erected. There is an arcuate second flow guiding portion. An exhaust hood having an anti-disturbing airflow capability according to claim 1 or 2, wherein the suction hood includes a wind collecting box connected to a top surface of the wind collecting box, and the elongated shape The suction port is formed at the bottom of the collecting box. An exhaust hood having an anti-disturbing airflow capability as described in claim 3, wherein the air suction device is provided with a suction inlet which is offset from directly above the elongated suction port. An exhaust hood having an anti-disturbing airflow capability according to the fourth aspect of the invention, wherein the front end of the platform is provided with an elongated blowing end, and the elongated blowing end is provided with a narrow length corresponding to the elongated suction port. The air blowing port is configured to allow the narrow air blowing port to spray the air jet upward at an oblique angle, and enter the narrow air suction port to form an oblique air curtain between the narrow air blowing port and the narrow air suction port. An exhaust hood having anti-disturbing airflow capability according to claim 3, wherein the wind collecting box is provided with a bottom plate, and the elongated suction port is formed on the bottom plate, and the plate surface of the bottom plate is fastened. There is an oil retaining frame that surrounds the narrow suction port. An exhaust hood having anti-disturbing airflow capability is installed above a platform, and an exhaust device is arranged on a surface of the platform, the exhaust hood includes: a suction hood having a narrow opening at the bottom thereof a lower suction port, the elongated suction port is connected to an air suction device for sucking air upward; and the elongated suction port is disposed at a middle position between the front end surface and the rear end surface of the air suction cover, and parallel to the front end surface And the rear end surface; an elongated left vertical plate fixed to the lower side of the left side surface of the suction hood, the horizontal width of the long left vertical plate is not less than a horizontal width of the left side surface of the 1/4 suction hood, for Covering the left side of the exhaust device, the length of the elevation of the elongated left vertical plate is not less than the height of the platform to the bottom end of the elongated left vertical plate, and the front end surface of the left vertical plate and the front end of the left side surface of the suction cover Forming a first air supply space; and an elongated right vertical plate fixed to the lower side of the right side surface of the suction hood, the horizontal right vertical plate having a horizontal width of not less than 1/4 of the right side of the suction hood Horizontal width to cover the right side of the exhaust, the length Facade length is not less than the right vertical plate to the platform height at the bottom of the right upright elongated plate, the bottom line of the right front end surface of the distal end of the hood and a right vertical plates forms a second space qi. The hood having the anti-disturbing airflow capability according to the seventh aspect of the invention, wherein the front and the rear ends of the platform are respectively provided with an elongated blowing end, and the two narrow blowing ends are respectively provided. There is a narrow-shaped air blowing port corresponding to the narrow-shaped air suction port for respectively ejecting the air jet flow at an oblique angle, and simultaneously entering the narrow-shaped air suction port, forming two paths between the narrow-shaped air suction port and the two narrow-shaped air blowing ports Corresponding diagonal air curtain.