CN213856227U

CN213856227U - Oblique air-extracting chemical exhaust cabinet

Info

Publication number: CN213856227U
Application number: CN202022316666.1U
Authority: CN
Inventors: 黄荣芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2021-08-03
Anticipated expiration: 2030-10-16

Abstract

The utility model provides an oblique air extraction type chemical exhaust cabinet, which mainly comprises a cabinet body, wherein the lower parts of the left side and the right side of an air suction cover of the cabinet body are respectively connected with a left side plate and a right side plate, and the bottom of the air suction cover is provided with an air extraction end with a narrow and long air extraction opening for extracting air upwards; the left deflection plane of the left deflection part at the front end of the left side plate is provided with a first left boundary layer separation line and a second left boundary layer separation line which are parallel to each other; the right deflection plane of the right deflection part at the front end of the right side plate is provided with a first right boundary layer separation line and a second right boundary layer separation line which are parallel to each other; and the lower deflection plane of the lower deflection part at the front end of a bottom plate is provided with a first lower boundary layer separation line and a second lower boundary layer separation line which are parallel to each other. Therefore, air can stably enter the cabinet body through the respective guidance of the left deflection plane, the right deflection plane and the lower deflection plane, so as to prevent oil smoke pollutants from leaking outwards from an opening in the front of the cabinet body.

Description

Oblique air-extracting chemical exhaust cabinet

Technical Field

The utility model relates to a slant air extraction formula chemical exhaust cabinet indicates especially one kind and can effectively prevent that the oil smoke pollutant from leaking to be applicable to mill, laboratory and commercial kitchen.

Background

The air exhausting mode of the traditional exhaust hood is that an open cover plate is erected at the upper end of the air hood, a guide plate with a specially designed opening is erected at the rear part of the cabinet body, and harmful gas in the cabinet is exhausted through the opening of the cover plate at the upper part and the opening of the guide plate at the rear part of the cabinet body through an air exhausting device and a guide pipe. However, the oil smoke or other harmful substances in the cabinet are very easy to leak from the periphery of the cabinet door due to the basic reasons of gas dynamics, and the leakage is particularly serious when the periphery has interfering airflow or people walk, and the main reason of the leakage is that vortex and strong turbulence are easily formed at the periphery of the cabinet door and in front of the chest of an operator, so that the exchange of the internal and external mass and momentum of the cabinet body is caused, and the leakage of the pollutants in the cabinet is almost difficult to avoid.

Therefore, the fume hood as in taiwan new publication No. M472166 mainly utilizes an inclined air curtain to solve the leakage problem of the conventional fume hood. A long and narrow air exhaust opening and a long and narrow air blowing opening are arranged at the bottom of an air suction cover at the top end of a cabinet body, the opening of the long and narrow air exhaust opening faces downwards and is parallel to a rear plate, the long and narrow air exhaust opening is positioned between the long and narrow air blowing opening and the rear plate, the length of the long and narrow air blowing opening is larger than that of the long and narrow air exhaust opening, a left deflection plate is vertically fixed in an accommodating space in a manner of being inclined relative to a left side plate, and a right deflection plate is symmetrical to the left deflection plate and is vertically fixed in a manner of being inclined relative to a right side plate. Thus, when the long and narrow air exhaust opening exhausts air upwards and the long and narrow air blowing opening blows air downwards, air can enter the cabinet body through the air replenishing spaces at the two ends of the long and narrow air blowing opening under the guidance of the left deflection plate and the right deflection plate, so that oil smoke pollutants are prevented from being leaked outwards from the opening in the front of the cabinet body and being exhausted upwards. The bottom of the front end of the air suction cover is provided with a first arc-shaped guide part, the front end of the bottom plate is provided with a second arc-shaped guide part, and the front end of the left side plate and the front end of the right side plate are respectively provided with a first arc-shaped guide plate and a second arc-shaped guide plate so as to guide airflow to enter the accommodating space and reduce the degree of vortex and disturbance when air is sucked into the opening.

SUMMERY OF THE UTILITY MODEL

However, when the oil smoke pollutants enter the accommodating space from the opening in the front of the cabinet body, the arc-shaped structures of the guide plates respectively generate large backflow bubbles through a boundary layer separation line, airflow in each direction entering the accommodating space respectively, unstable vortex is formed in the cabinet, and harmful gas is diffused and leaked outwards through the mutual exchange effect of the unstable airflow and air outside the cabinet body. In view of this, in order to provide a structure different from the prior art and improve the above-mentioned shortcomings, the utility model discloses a designer has long-lived experience and continuous research and development improvement, has carried out the utility model discloses a production.

An object of the utility model is to provide a slant air extraction formula chemical exhaust cabinet, in order to solve the arc guide plate structure of current oil extraction fume cupboard can let the internal unstable vortex of forming of cabinet, and can let the problem that harmful gas outwards diffuses the leakage, and can rely on the left side at the cabinet body, the front end of right side board is equipped with upright deflection plane respectively, and be equipped with horizontal deflection planar structure at the bottom plate front end of the cabinet body, in order to reduce the size of backward flow bubble by a wide margin, it is internal to let the smooth and easy entering cabinet of air, in order to reduce the production of unstable vortex, and then reduce the probability that the oil smoke pollutant leaked.

In order to achieve the above object of the present invention, the oblique air exhaust chemical exhaust cabinet of the present invention comprises a cabinet body, the cabinet body has an air suction cover, a bottom plate, a left side plate, a right side plate and a back plate, and the frame encloses a containing space, an opening is formed in front of the cabinet body, the left side plate and the right side plate are respectively connected to the lower parts of the left and right sides of the air suction cover, the bottom of the air suction cover is provided with an air exhaust end, the air exhaust end has a narrow air exhaust opening with a downward opening for exhausting air upwards, the main technical feature is that the front end of the left side plate has a vertical left deflection portion which is inclined forwards and leftwards, the left deflection portion has a left deflection plane, and the left deflection plane has a first left boundary layer separation line and a second left boundary layer separation line which are parallel to each other; the front end of the right side plate is provided with a right deflection part which is upright and deflects forwards and rightwards, the right deflection part is provided with a right deflection plane, and the right deflection plane is provided with a first right boundary layer separation line and a second right boundary layer separation line which are parallel to each other; and the front end of the bottom plate is provided with a lower deflection part which is transverse and deflects forwards and downwards, the lower deflection part is provided with a lower deflection plane, and the lower deflection plane is provided with a first lower boundary layer separation line and a second lower boundary layer separation line which are parallel to each other.

When the cabinet is implemented, the front part of the cabinet body is further provided with a front door plate, the bottom end of the front door plate is provided with a transverse upper deflection part, the upper deflection part deflects downwards in the direction towards the rear plate, the upper deflection part is provided with an upper deflection plane, and the upper deflection plane is provided with a first upper boundary layer separation line and a second upper boundary layer separation line which are parallel to each other.

When in use, the utility model further comprises a left deflection plate and a right deflection plate, the left deflection plate is vertically fixed in the containing space in a manner of deflecting relative to the left side plate, the front end of the left deflection plate is abutted against the right side surface of the left side plate, so that a first included angle is formed between the left deflection plate and the left side plate, and the angle opening of the first included angle faces to the rear plate; the right deflection plate is symmetrical to the left deflection plate, the right deflection plate is vertically fixed in the containing space in a deflection mode relative to the right side plate, the front end of the right deflection plate abuts against the left side face of the right side plate, so that a second included angle is formed between the right deflection plate and the right side plate, and the angle opening of the second included angle faces the rear plate.

When the air-jet device is used, a long and narrow air-jet opening is further arranged on the bottom plate for ejecting air flow upwards, the long and narrow air-jet opening is parallel to the long and narrow air-jet opening, and the long and narrow air-jet opening is positioned below the front end of the long and narrow air-jet opening.

When the device is implemented, the left deflection part extends leftwards at an angle to form a left extension plate, and the first left boundary layer separation line is positioned between the left deflection part and the left extension plate; the right deflection portion further extends to the right at an angle to form a right extension plate, and the first right boundary layer separation line is located between the right deflection portion and the right extension plate.

In summary, according to the disclosure above, the present invention provides an inclined air exhaust type chemical exhaust cabinet, which can achieve the expected purpose compared with the conventional exhaust cabinet and air curtain type exhaust fume hood, and can reduce the size of the backflow bubbles formed when air enters the cabinet body, so that the air can smoothly enter the cabinet body, thereby reducing the generation of unstable vortex, and further reducing the leakage and dissipation probability of oil fume pollutants by virtue of the structure that the front ends of the left and right side plates of the cabinet body are respectively provided with the vertical deflection planes and the front end of the bottom plate of the cabinet body is provided with the transverse deflection plane.

In order to facilitate a deeper understanding of the present invention, it will be described in detail later.

Drawings

Fig. 1 is a side sectional view of a preferred embodiment of the present invention.

Fig. 2 is a schematic bottom sectional view of a preferred embodiment of the present invention.

Fig. 3 is a usage status diagram of the preferred embodiment of the present invention.

Fig. 4 is a usage status diagram of the preferred embodiment of the present invention.

Description of reference numerals: an oblique air extraction type chemical exhaust cabinet; a cabinet body 2; an air intake cover 2; an air extraction end 211; a pumping port 212; a front door panel 22; an upper deflection portion 22; an upper deflection plane 222; a first upper boundary layer separation line 223; a second upper boundary layer separation line 224; a left side plate 23; a left deflection portion 231; a left deflection plane 232; a first left boundary layer separation line 233; a second left boundary layer separation line 234; a left extension plate 235; a right side plate 24; a right deflection portion 241; a right deflection plane 242; a first right boundary layer separation line 243; a second right boundary layer separation line 244; a right extension plate 245; a bottom plate 25; a lower deflection portion 251; a lower deflection plane 252; a first lower boundary layer separation line 253; a second lower boundary layer separation line 254; an air jet 255; a back plate 26; an accommodating space 27; an opening 28; a storage cabinet 29; a left deflection plate 3; a right deflection plate 4.

Detailed Description

Please refer to fig. 1 and 2, which are preferred embodiments of the slant extraction type chemical exhaust cabinet 1 of the present invention, and mainly include a cabinet body 2, the cabinet body 2 is roughly rectangular, and a storage cabinet 29 with support legs is disposed below the cabinet body 2 to support the cabinet body upward. The cabinet body 2 includes an air suction hood 21, a front door panel 22, a left side panel 23, a right side panel 24, a bottom panel 25, a rear panel 26, a left deflection plate 3 and a right deflection plate 4, after the panels are combined, an accommodating space 27 is formed inside the cabinet body 2, and an opening 28 is formed at the bottom of the front door panel 22 of the sliding door type, during the implementation, the front door panel 22 can also be a fixed door sheet.

The bottom of the suction hood 21 is provided with a suction end 211, the suction end 211 has a suction opening 212 with a downward opening, the suction opening 212 is in a long and narrow rectangular shape, and the long end of the long and narrow suction opening 212 is parallel to the front door panel 22 and the rear panel 26. The top of the suction hood 21 is provided with an exhaust port connected to an air extractor, so that when the air extractor is operated, the long and narrow air extracting end 211 extracts air to guide the air in the cabinet 2 to flow upward.

The bottom end of the front door panel 22 has an upper deflection plate extending transversely and obliquely downward in a direction toward the rear panel 26, the upper deflection plate serves as an upper deflection portion 221, the lower plate surface of the upper deflection plate is a planar upper deflection plane 222, a second upper boundary layer separation line 224 is formed at the junction of the upper deflection plane 222 and the bottom end of the front door panel 22, a first upper boundary layer separation line 223 is formed at the free end of the upper deflection plane 222, and the first upper boundary layer separation line 223 and the second upper boundary layer separation line 224 are parallel to each other.

The left side plate 23 and the right side plate 24 are respectively a rectangular vertical plate, and the left side plate 23 and the right side plate 24 are respectively connected to the lower portions of the left and right sides of the air intake cover 21. Wherein, the front end of the left side plate 23 has a vertical left deflection plate extending forward and obliquely leftward, and the left deflection plate is used as the left deflection part 231; one plate surface of the left deflection plate is a planar left deflection plane 232, and a second left boundary layer separation line 234 is formed at the joint of the left deflection plane 232 and the front end of the right side surface of the left side plate 23; the left deflection portion 231 extends a left extension plate 235 at an angle to the left, and the junction of the left extension plate 235 and the left deflection plane 232 forms a first left boundary layer separation line 233, and the first left boundary layer separation line 233 and the second left boundary layer separation line 234 are parallel to each other. The front end of the right side plate 24 is provided with a right deflection plate which is upright and extends obliquely forwards and rightwards, and the right deflection plate is used as a right deflection part 241; the right deflection portion 241 and the left deflection portion 231 are symmetrical to each other and have a shape of "eight" extending outward toward the front end of the cabinet 2. One surface of the right deflection plate is a planar right deflection plane 242, and a second right boundary layer separation line 244 is formed at the joint of the right deflection plane 242 and the front end of the left side surface of the right side plate 24; the right deflection portion 241 extends a right extension plate 245 at an angle to the left, and a first right boundary layer separation line 243 is formed at the junction of the right extension plate 245 and the right deflection plane 242, and the first right boundary layer separation line 243 and the second right boundary layer separation line 244 are parallel to each other.

The front end of the bottom plate 25 has a lower deflecting plate extending transversely and obliquely forward and downward, and the lower deflecting plate is used as a lower deflecting part 251; the upper panel surface of the lower deflection flap is a planar lower deflection plane 252, a second lower boundary layer separation line 254 is formed at the joint of the lower deflection plane 252 and the front end of the top surface of the bottom panel 25, a first lower boundary layer separation line 253 is formed at the joint of the lower deflection plane 252 and the top of the front end surface of the storage cabinet 29, and the first lower boundary layer separation line 253 and the second lower boundary layer separation line 254 are parallel to each other. The bottom plate 25 further has a long and narrow air outlet 255, the long and narrow air outlet 255 is parallel to the long and narrow air exhaust opening 212, the long and narrow air outlet 255 is located below the front end of the long and narrow air exhaust opening 212, and the long and narrow air outlet 255 is connected to the fan in the storage cabinet 29 through a communication pipe to eject the air flow upward.

The left deflection plate 3 and the right deflection plate 4 are respectively a rectangular vertical plate, wherein the left deflection plate 3 is vertically fixed in the accommodating space 27 in a manner of deflecting relative to the left side plate 23, the front end of the left deflection plate 3 abuts against the right side surface of the left side plate 23, a first included angle θ 1 is formed between the left deflection plate 3 and the left side plate 23, and an angle opening of the first included angle θ 1 faces the rear plate 26. The right deflecting plate 4 is bilaterally symmetrical to the left deflecting plate 3, the right deflecting plate 4 is vertically fixed in the accommodating space 27 in a manner of deflecting relative to the right side plate 24, the front end of the right deflecting plate 4 abuts against the left side surface of the right side plate 24, a second included angle theta 2 is formed between the right deflecting plate 4 and the right side plate 24, and the angle opening of the second included angle theta 2 faces the rear plate 26.

Thus, as shown in fig. 3 and 4, when the air extracting device is operated, the external air in front of the cabinet 2 can enter the accommodating space 27 of the cabinet 2 through the opening 28 by the air extraction of the elongated air extracting end 211, and then is sucked upwards into the air suction cover 21 through the air extracting opening 212 to exhaust the oil smoke or other harmful substances. When the airflow in front of the cabinet 2 passes through the opening 28, a small backflow bubble is formed because the airflow first contacts the first upper boundary layer separation line 223, the first lower boundary layer separation line 253, the first left boundary layer separation line 233 and the first right boundary layer separation line 243; when the airflow continues to move forward and contacts the second upper boundary layer separation line 224, the second lower boundary layer separation line 254, the second left boundary layer separation line 234 and the second right boundary layer separation line 244, another small backflow bubble is formed, and the subsequent airflow crosses the backflow bubbles and the left and right deflection plates (3, 4) to guide the airflow to smoothly and stably enter the accommodating space 27, so that unstable vortex generation is reduced, the disturbance degree of the air is reduced, and the outward leakage of oil smoke pollutants is prevented.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a slant air exhaust formula chemical fume chamber, includes a cabinet body, and this cabinet body has a suction hood, a bottom plate, a left side board, a right side board and a back plate to enclose and form an accommodation space, the place ahead of this cabinet body forms an opening, this left side board and this right side board are connected respectively in the left and right sides below of this suction hood, the bottom of this suction hood is equipped with one and bleed the end, should bleed the end and have an opening long and narrow extraction opening down, supply to bleed upwards, its characterized in that:

the front end of the left side plate is provided with a vertical left deflection part which deflects forwards and leftwards, the left deflection part is provided with a left deflection plane, and the left deflection plane is provided with a first left boundary layer separation line and a second left boundary layer separation line which are parallel to each other;

the front end of the right side plate is provided with a right deflection part which is upright and deflects forwards and rightwards, the right deflection part is provided with a right deflection plane, and the right deflection plane is provided with a first right boundary layer separation line and a second right boundary layer separation line which are parallel to each other; and

the front end of the bottom plate is provided with a lower deflection part which is transverse and deflects forwards and downwards, the lower deflection part is provided with a lower deflection plane, and the lower deflection plane is provided with a first lower boundary layer separation line and a second lower boundary layer separation line which are parallel to each other.

2. The slant extraction type chemical exhaust cabinet according to claim 1, wherein: the front door plate is arranged in front of the cabinet body, the opening is arranged at the bottom of the front door plate, the bottom end of the front door plate is provided with a transverse upper deflection part, the upper deflection part deflects downwards in the direction towards the rear plate, the upper deflection part is provided with an upper deflection plane, and the upper deflection plane is provided with a first upper boundary layer separation line and a second upper boundary layer separation line which are parallel to each other.

3. The slant extraction type chemical exhaust cabinet according to claim 1, wherein: the left deflection plate is vertically fixed in the accommodating space in a manner of deflecting relative to the left side plate, the front end of the left deflection plate abuts against the right side surface of the left side plate, so that a first included angle is formed between the left deflection plate and the left side plate, and the angle opening of the first included angle faces the rear plate; the right deflection plate is symmetrical to the left deflection plate, the right deflection plate is vertically fixed in the accommodating space in a deflection mode relative to the right side plate, the front end of the right deflection plate abuts against the left side face of the right side plate, so that a second included angle is formed between the right deflection plate and the right side plate, and the angle opening of the second included angle faces the rear plate.

4. The slant extraction type chemical exhaust cabinet according to claim 1, wherein: the bottom plate is also provided with a long and narrow air jet opening for ejecting air flow upwards, the long and narrow air jet opening is parallel to the long and narrow air suction opening, and the long and narrow air jet opening is positioned below the front end of the long and narrow air suction opening.

5. The slant extraction type chemical exhaust cabinet according to claim 1, wherein: the left deflection part further extends leftwards by an angle to form a left extension plate, and the first left boundary layer separation line is positioned between the left deflection part and the left extension plate; the right deflection portion further extends at an angle to the right to form a right extension plate, and the first right boundary layer separation line is located between the right deflection portion and the right extension plate.