TWM484679U - Exhaust cabinet - Google Patents

Description

Exhaust cabinet

This creation is about a type of exhaust cabinet, especially one that can effectively prevent the leakage of soot pollutants for use in factories, laboratories, and commercial kitchens.

The conventional exhaust cabinet is pumped by means of an open shutter at the upper end of the gas cabinet, and a baffle with a specially designed opening is erected vertically behind the cabinet, and the harmful gas in the cabinet is passed through the air suction device and the duct. The opening of the upper shutter and the opening of the deflector behind the cabinet are extracted. However, the soot or other harmful substances in the cabinet are easily leaked from the periphery of the cabinet due to the basic causes of gas dynamics, and the leakage is particularly serious when there are disturbances or people walking around, and the main cause of the leakage. It is because the vortex and strong turbulence are easily formed around the door of the cabinet and the operator's chest, which leads to the exchange of mass and momentum between the inside and outside of the cabinet. Therefore, the leakage of pollutants in the cabinet is almost inevitable.

Therefore, as shown in Figures 5 and 6, the "exhaust cabinet" of Announcement No. M472166 is mainly provided with a narrow suction port b and a narrow air blowing port c at the bottom of the suction hood a, below the suction hood a. The accommodating space is provided with a symmetrical left deflecting plate d and a right deflecting plate e, and forms a first between the left and right sides of the elongated air blowing port c and the left and right deflecting plates (d, e) respectively. And two qi space to solve the problem of the above traditional exhaust cabinet leakage.

With the above structure, it is possible to effectively block the polluting gas in the cabinet and eliminate it. Most of the high temperature fumes. However, as a result of the experiment, there will still be a small amount of polluted gas that will leak through the top of the opening in front of the cabinet due to the airflow in the cabinet.

In view of this, in order to provide a structure different from the conventional technology and to improve the above-mentioned shortcomings, the creator has accumulated many years of experience and continuous research and development improvements, and this creation has not been produced.

An object of the present invention is to provide a ventilating cabinet, which is provided with a narrow suction port, a narrow air blowing port and a long baffle at the bottom of the suction hood, and is provided in the accommodating space below the cabinet. The structure of the left and right deflecting plates can effectively block the airflow in the cabinet, eliminate the high temperature soot, and prevent the smoke from leaking.

An object of the present invention is to provide a ventilating cabinet, which is provided with a deflector at the front end of the left and right side panels of the cabinet, and a guide portion at the front end of the suction hood and the front end of the bottom plate.俾 Allows air to enter the cabinet smoothly, reducing the chance of contaminant leakage.

For the purpose of the above creation, the exhaust cabinet provided by the creation includes a cabinet, a left deflecting plate and a right deflecting plate. The cabinet comprises a suction hood, a bottom plate, a left side plate, a right side plate and a rear plate, and an enclosure space is formed around the frame, an opening is formed at a front end of the cabinet body, and a suction end and a blowing air are arranged at a bottom of the suction hood The end and the long baffle plate, the pumping end is formed with an elongated suction port with an opening facing downward for pumping upward, and the blow end is formed with an elongated blow port with an opening facing downward for blowing downward, narrowly drawing The air port, the narrow-shaped air blowing port, the long-shaped baffle plate and the rear plate are parallel to each other, and the narrow-shaped air suction port is located between the narrow-shaped air blowing port and the rear plate, and the narrow-shaped air blowing port is located in the long-shaped baffle plate and the narrow-shaped air suction port. between. The left deflecting plate is vertically fixed in the accommodating space in a manner of being skewed relative to the left side plate, and the front end of the left deflecting plate abuts against the right side surface of the left side plate, thereby forming a first between the left deflecting plate and the left side plate An angle, the angle of the first angle is oriented toward the rear plate; and the right deflection plate is symmetrical to the left Folding plate, and the right deflecting plate is vertically fixed in the accommodating space in a manner of being skewed relative to the right side plate, and the front end of the right deflecting plate abuts against the left side surface of the right side plate, thereby making the right deflecting plate and the right side plate A second angle is formed between the angles of the second angle toward the rear plate.

In practice, the elongated baffle is a plate body extending downward from the bottom of the suction hood, and a leading surface of the elongated baffle forms a guiding surface.

In implementation, the bottom of the front end of the suction hood is provided with a first guiding portion, the front end of the bottom plate is provided with a second guiding portion, the front end of the left side plate is provided with a first deflector, and the front end of the right side plate is provided with a second guiding A flow plate for guiding the airflow into the accommodating space.

In implementation, the first baffle includes a left sloping plate bent obliquely to the left from the front end of the left side plate and a left vertical plate bent to the left by the front end of the left slanting plate, the second baffle including the right side plate The front end is bent obliquely to the right and the right sloping plate is bent to the right by the front end of the right slanting plate.

In order to facilitate a deeper understanding of this creation, it is detailed later:

1‧‧‧Exhaust cabinet

2‧‧‧ cabinet

21‧‧‧ suction hood

211‧‧‧ first guide

212‧‧‧Second guidance

213‧‧‧Exhaust end

214‧‧‧Blowing end

215‧‧‧Exhaust port

216‧‧‧Blowing mouth

217‧‧‧Exhaust port

22‧‧‧floor

23‧‧‧left side panel

231‧‧‧First deflector

232‧‧‧left sloping plate

233‧‧‧Left vertical board

24‧‧‧right board

241‧‧‧Second deflector

242‧‧‧Right sloping plate

243‧‧‧right board

25‧‧‧ Back panel

26‧‧‧ accommodating space

27‧‧‧ openings

29‧‧‧Lockers

3‧‧‧Baffle

31‧‧‧ Guide surface

4‧‧‧Left deflector

5‧‧‧ Right deflecting plate

θ 1‧‧‧ first angle

θ 2‧‧‧second angle

9‧‧‧heating equipment

B, B’‧‧ vortex

A‧‧‧ suction hood

b‧‧‧Exhaust port

c‧‧‧Blowing port

d‧‧‧Left deflecting plate

e‧‧‧Right deflecting plate

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side cross-sectional view of a preferred embodiment of the present invention.

Figure 2 is a schematic cross-sectional view of a preferred embodiment of the present invention.

Figures 3 and 4 are diagrams showing the state of use of the preferred embodiment of the present invention.

Figure 5 is a side cross-sectional view of a conventional exhaust cabinet.

Figure 6 is a bottom cross-sectional view of a conventional exhaust cabinet.

Please refer to FIGS. 1 and 2 , which are a preferred embodiment of the creation of the exhaust cabinet 1 , including a cabinet 2 , an elongated baffle 3 , a left deflecting plate 4 and a right deflecting plate . 5.

The cabinet body 2 is substantially rectangular parallelepiped, and a storage cabinet 29 with legs is arranged below to support the cabinet 2. The cabinet body 2 includes a suction hood 21, a bottom plate 22, a left side plate 23 and a right side. The plate 24 and the rear plate 25 are combined to form an accommodation space 26 inside the cabinet 2, and an opening 27 is formed below the front end of the suction cover 21.

In this embodiment, the suction hood 21, the left side panel 23, and the right side panel 24 are defined as a front end adjacent to one side or one side of the user, and are defined as a rear end opposite to one side or one side of the user, and are inhaled at the user side. When the cover 21, the left side plate 23, and the right side plate 24 are defined, the left side and the right side are defined. The bottom of the front end of the suction hood 21 is provided with a first guiding portion 211 which is inclined upward to form a slope. The front end of the bottom plate 22 is provided with a second guiding portion 212 which is inclined downward to form a slope, and the left side plate 23 The front end and the front end of the right side plate 24 are respectively provided with a first baffle 231 and a second baffle 241. The first baffle 231 includes a left slanting plate 232 and a left vertical plate 233. The left slanting plate 232 is a vertical plate that is bent obliquely to the left by the front end of the left side plate 23, and the left vertical plate 233 is left. The front end of the swash plate 232 is bent to the left; and the second baffle 241 includes a right slanting plate 242 and a right vertical plate 243. The right slanting plate 242 is bent obliquely to the right by the front end of the right side plate 24. The vertical plate 243 is formed by bending the front end of the right slanting plate 242 to the right.

The bottom of the suction hood 21 is provided with a suction end 213, a blowing end 214 and an elongated baffle 3, and the suction end 213 is formed with a suction opening 215 with an opening facing downward, and the blowing end 214 is formed with a suction port 214. The air blowing port 216 and the air blowing port 216 are respectively elongated and rectangular, and the elongated air suction port 215, the elongated air blowing port 216 and the elongated baffle plate 3 are respectively parallel to the rear plate 25, The elongated suction port 215 is located between the elongated blow port 216 and the rear plate 25, and the elongated blow port 216 is located between the elongated baffle 3 and the elongated suction port 215. The long baffle plate 3 is a plate body extending downward from the bottom of the suction hood 21, and the front end of the elongated baffle plate 3 forms a guiding surface 31 which is formed by the suction hood 21 a slope that extends obliquely rearward and downward, and when implemented, the guide surface The 31 can also be a curved surface, which can also enhance the guiding effect, so that the airflow can smoothly enter the accommodating space 26.

A plurality of exhaust ports 217 are disposed at the top end of the suction hood 21, and each of the exhaust ports 217 is connected to an air suction device to pump the narrow suction end 213 and guide the cabinet when the air suction device is in operation. The air inside 2 is upward; and the narrow air blowing end 214 is in communication with a blower to allow the air blowing port 216 to blow a two-dimensional air jet downward through the action of the air blower. In practice, the blower may also be a cross flow fan; the air suction device is an exhaust fan, a blower or other extractable fluid machine.

The left and right deflecting plates (3, 4) are respectively a rectangular vertical plate, wherein the left deflecting plate 3 is vertically fixed in the accommodating space 26 in a manner of being skewed relative to the left side plate 23, and the left deflecting plate The front end of 3 abuts against the right side surface of the left side plate 23, and a first angle θ1 is formed between the left deflecting plate 3 and the left side plate 23, and the angle of the first angle θ 1 is opened toward the rear plate 25. The right deflecting plate 4 is symmetrical to the left deflecting plate 3, and the right deflecting plate 4 is vertically erected in the accommodating space 26 so as to be skewed relative to the right side plate 24, and the front end of the right deflecting plate 4 abuts On the left side surface of the right side plate 24, a second angle θ 2 is formed between the right deflecting plate 4 and the right side plate 24, and the angle of the second angle θ 2 is opened toward the rear plate 25.

Thereby, as shown in FIGS. 3 and 4, when the object or facility disposed on the bottom plate 22 is a heating device 9 that generates high-temperature soot, such as a heating furnace or a heating plate, the high-temperature fume is buoyant by the high-temperature gas. The effect can make the soot rise. The soot is sucked up through the suction port 215, the air is blown downward through the air blowing port 216, and the air flow is guided by the first baffle 231, the second baffle 241, the left deflecting plate 3, and the right deflecting plate 4.

As shown in FIG. 3, during the air suction process, the air outside the left side plate 23 and the right side plate 24 is respectively opened by the opening of the left side plate 23 and the front side of the right side plate 24 via the lower side of the suction hood 2 When the air is taken into the accommodating space 26, the airflow flows along the left vertical plate 233, the left slanting plate 232, the right vertical plate 243, and the right slanting plate 242, respectively, and the airflow boundary layer is before the left slanting plate 232 and the right slanting plate 242, respectively. The edges are separated to form a small reflux bubble. At this time, the lengths of the left slanting plate 232 and the right slanting plate 242 are respectively greater than the length of the small returning bubble, and the airflow boundary layer is located behind the left slanting plate 232 and the right slanting plate 242. The left slanting plate 232 and the right slanting plate 242 are further flowed backward, and finally left at the rear edge of the left slanting plate 232 and the right slanting plate 242, and respectively form a vortex. The two vortexes (B, B') are formed behind the left slanting plate 232 and the right slanting plate 242, respectively, and are relatively far from the opening 27 below the suction hood 2. When the airflow enters the accommodating space 26 inside the cabinet 2 and passes through the left deflecting plate 3 and the right deflecting plate 4, a stable vortex pair that abuts against each other can be formed, and the soot is stably brought to the upper side. The port 215 is discharged outward. When the airflow flows on the right side of the left side panel 23 of the cabinet 2 and the left side of the right side panel 24, the air entering the cabinet 2 can be prevented due to the blocking and guiding of the left and right deflecting plates (3, 4). It will then flow back along the original path to avoid most of the high temperature fumes leaking out.

As shown in FIG. 4, when a small portion of the high-temperature soot leaks outward through the front end of the blow port 216 toward the top end of the front opening 27 of the cabinet 2, the fume can be prevented by the obstruction of the long baffle 3 The contaminants are leaked outward from the opening 27 in front of the cabinet 2, and a small portion of the high-temperature fume is brought back into the suction port 215 due to the continuous blowing of the air from the blowing port 216, and is discharged outward.

Therefore, compared with the conventional exhaust cabinet, this creation has the following advantages:

1. This creation can make the air entering the cabinet not back through the combination of the narrow suction port, the narrow air blowing port, the left deflecting plate and the right deflecting plate, and the small baffle is used to block less. Part of the high temperature soot, therefore, can effectively eliminate high temperature soot and prevent soot leakage.

2. The first deflector, the second deflector, the first guiding portion and the second guiding portion of the creation can smoothly guide the air to reduce the backflow generated when the air is sucked into the opening, therefore, Effectively prevent Backflow removes fumes or contaminants from the opening to reduce the chance of contaminant leakage.

In summary, according to the above disclosure, this creation can achieve the intended purpose, providing a kind of exhaust cabinet that can effectively reduce the dissipation of soot or pollutants to ensure the safety of use, which is of great industrial value. , 提出 file a new type of patent application.

1‧‧‧Exhaust cabinet

2‧‧‧ cabinet

21‧‧‧ suction hood

211‧‧‧ first guide

212‧‧‧Second guidance

213‧‧‧Exhaust end

214‧‧‧Blowing end

215‧‧‧Exhaust port

216‧‧‧Blowing mouth

217‧‧‧Exhaust port

22‧‧‧floor

23‧‧‧left side panel

231‧‧‧First deflector

232‧‧‧left sloping plate

25‧‧‧ Back panel

26‧‧‧ accommodating space

27‧‧‧ openings

29‧‧‧Lockers

3‧‧‧Baffle

31‧‧‧ Guide surface

4‧‧‧Left deflector

Claims (5)

An exhaust cabinet comprising: a cabinet comprising a suction hood, a bottom plate, a left side plate, a right side plate and a rear plate, and surrounding the frame to form an accommodating space, wherein the suction hood and the left side The side plate or the right side plate is defined as a front end adjacent to one side or one side of the user, and is defined as a rear end opposite to or away from one side of the user, and defines the left side and the right side when the user faces the suction hood, the left side plate and the right side plate The front end of the cabinet forms an opening, and the bottom of the suction hood is provided with a suction end, a blowing end and an elongated baffle, and the suction end forms an elongated suction opening with the opening facing downward for Pumping up, the blow end is formed with an elongated blow port with an opening facing downward for blowing downward, the elongated suction port, the elongated blow port, the elongated baffle and the rear plate are parallel to each other, The elongated suction port is located between the elongated blowing port and the rear plate, the elongated blowing port is located between the elongated baffle and the elongated suction port; a left deflecting plate is opposite to the The left side plate is skewed and fixed in the accommodating space, which The front end of the deflecting plate abuts against the right side surface of the left side plate, so that a first angle is formed between the left deflecting plate and the left side plate, the angle of the first angle is open toward the rear plate; and a right The deflecting plate is symmetrical to the left deflecting plate, and the right deflecting plate is erected and fixed in the accommodating space in a manner of being skewed relative to the right side plate, and the front end of the right deflecting plate abuts against the The left side surface of the right side plate is formed such that a second angle is formed between the right deflecting plate and the right side plate, and the angle of the second angle is open toward the rear plate. The exhaust cabinet of claim 1, wherein the elongated baffle is a plate body extending downward from a bottom of the suction hood, and the front end of the elongated baffle forms a guiding surface . The exhaust cabinet of claim 1 or 2, wherein the bottom of the front end of the suction hood is provided with a first guiding portion, and the front end of the bottom plate is provided with a second guiding portion. The exhaust cabinet of claim 1 or 2, wherein the front end of the left side plate is provided A first baffle is disposed at a front end of the right side plate to guide the airflow into the accommodating space. The exhaust cabinet of claim 4, wherein the first baffle comprises a left sloping plate bent obliquely to the left from a front end of the left side plate and a leftward bent end from a front end of the left slanting plate The left vertical plate is folded, and the second deflector comprises a right inclined plate which is bent obliquely to the right from the front end of the right side plate and a right vertical plate which is bent rightward from the front end of the right inclined plate.