CN212190530U

CN212190530U - Ventilation cabinet

Info

Publication number: CN212190530U
Application number: CN202020337394.0U
Authority: CN
Inventors: 陈坚生; 陈有荣
Original assignee: Zhuhai Keyipu Laboratory Equipment Co ltd
Current assignee: Zhuhai Keyipu Laboratory Equipment Co ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2020-12-22
Anticipated expiration: 2030-03-17

Abstract

The utility model discloses a ventilation cabinet, which comprises a cabinet body and a ventilation pipe, wherein the cabinet body is provided with an operation cavity; the ventilation pipe sets up in the operation chamber, and the ventilation pipe includes air inlet section, water conservancy diversion section and air-out section, and the air intake of air inlet section is towards the place ahead, and the air outlet of air-out section is towards the top. Through the mode that sets up the ventilation pipe in the fume chamber, reach the dust and get into from single import, prevent raise dust in the experimentation, the air intake is towards the place ahead, can guarantee that the dust is the shortest in the stroke when getting into the ventilation pipe, increases dust collection efficiency, prevents that the dust from raising the height. The inner wall of the junction of the air inlet section and the flow guide section is provided with a transition cambered surface, the transition cambered surface can facilitate dust to pass through, and dust can be prevented from accumulating at the junction of the air inlet section and the flow guide section to block the ventilation pipe.

Description

Ventilation cabinet

Technical Field

The utility model relates to an experimental facilities technical field, in particular to fume chamber.

Background

When carrying out the experiment in the laboratory, often can produce harmful gas in the experimentation, in order to prevent that harmful gas from hurting the human body, consequently will discharge harmful gas, the laboratory is often discharged with the harmful gas that the fume chamber produced in with the experimentation.

The fume chamber in the past carries out harmful gas's absorption and discharge through setting up the guide plate in the cabinet body the inside and setting up at the negative-pressure air fan at cabinet body top, because the fume chamber in the past is through setting up the polylith guide plate, has the gap between every two adjacent guide plates, this gap then forms the air intake, because the air intake has a plurality ofly, consequently it is more convenient to absorb harmful gas, but when absorbing the dust, a plurality of air intakes lead to the dust to fly away everywhere, influence the experimenter operation.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a fume chamber can prevent the raise dust when absorbing the dust.

According to the embodiment of the first aspect of the utility model, the fume hood comprises a cabinet body, which is provided with an operation cavity; the setting is in ventilation pipe in the operation chamber, the ventilation pipe includes air inlet section, water conservancy diversion section and air-out section, the air intake orientation of air inlet section the operation station in operation chamber the place ahead, the air outlet orientation of air-out section the vent of cabinet body top.

According to the utility model discloses fume chamber has following beneficial effect at least: through set up in the fume chamber the mode of ventilation pipe reaches the dust and gets into from single import, prevents the raise dust in the experimentation, the air intake is towards the place ahead, can guarantee that the dust is getting into the stroke when ventilation pipe is the shortest, increases dust collection efficiency, prevents that the dust from raising the height.

According to the utility model discloses a some embodiments, the air inlet section with the inner wall of the junction of water conservancy diversion section is provided with the transition cambered surface, the transition cambered surface can make things convenient for the dust to pass through, can also prevent that the dust is in the air inlet section with the jam is piled up to the junction of water conservancy diversion section the ventilation pipe.

According to the utility model discloses a some embodiments, the area of air outlet is greater than the area of air intake, the convenience increases the dust velocity of flow of air intake department under same burden, makes things convenient for the dust absorption.

According to the utility model discloses a some embodiments, the inner wall of air outlet is provided with first inclined plane, first inclined plane is by preceding to the backward downtilt that inclines down, first inclined plane can prevent that the dust from piling up the jam the air outlet.

According to the utility model discloses a some embodiments, the inner wall of ventilation pipe is provided with a plurality of water conservancy diversion structures, the water conservancy diversion structure can make the mixture of dust and air smoothly flow through the ventilation pipe reduces and is attached to dust on the inner wall of ventilation pipe.

According to some embodiments of the utility model, the air intake is provided with a plurality of drainage breachs, and is a plurality of drainage breach one-to-one connects a plurality of the water conservancy diversion structure, the drainage breach intercommunication the operation chamber, it is convenient dust in the operation chamber gets into.

According to the utility model discloses a some embodiments, it has the sunshade to articulate in the air intake, the sunshade is used for adjusting the follow the amount of wind that the air intake got into.

According to the utility model discloses a some embodiments, the lower limb of air intake sets up to from top to bottom and the second inclined plane that inclines forward, the second inclined plane can guide the dust to follow the second inclined plane gets into the ventilation pipe prevents that the dust is in the lower limb of air intake piles up.

According to the utility model discloses a some embodiments still include negative-pressure air fan, negative-pressure air fan's input intercommunication the air outlet, negative-pressure air fan is used for providing the negative pressure and absorbs the dust.

According to the utility model discloses a some embodiments still include the collecting storage, the collecting storage sets up the lower extreme of the cabinet body, the door opening has been seted up in the place ahead of the cabinet body, sliding connection has the cabinet door on the door opening, the cabinet door can the switching along vertical slip the door opening, the collecting storage can be used to accomodate experimental facilities.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a fume hood according to an embodiment of the present invention;

FIG. 2 is a perspective, cross-sectional view of the fumehood shown in FIG. 1;

FIG. 3 is a cross-sectional view of the fumehood shown in FIG. 1;

FIG. 4 is a schematic view of the ventilation duct of the fumehood shown in FIG. 1;

fig. 5 is a perspective view of a cross-sectional view of the ventilation tube of the fume hood shown in fig. 1.

The cabinet body 100, the cavity 110, the ventilation pipe 200, the air inlet section 210, the air outlet section 220, the air inlet 211, the air outlet 221, the transition arc 230, the first inclined plane 221a, the flow guide structure 240, the second inclined plane 211a, the flow guide notch 211b, the shielding plate 211c, the fan 300, the storage bin 400, the door opening 120 and the cabinet door 130

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 5, a ventilation cabinet includes a cabinet body 100 and a ventilation pipe 200, wherein an operation cavity 110 is provided on the cabinet body 100; the ventilation pipe 200 sets up in the operation chamber 110, and the ventilation pipe 200 includes air inlet section 210, water conservancy diversion section 250 and air-out section 220, and the interior bottom surface of operation chamber 110 is hugged closely to the bottom surface of air inlet section 210, and the rear end inside wall of operation chamber 110 is hugged closely to the trailing flank of water conservancy diversion section 250, and the upper end inside wall of operation chamber 110 is hugged closely to the up end of air-out section 220, and two inside walls about operation chamber 110 are hugged closely to the side about ventilation pipe 200, and the air intake 211 orientation of air inlet section 210 the operation station in operation chamber 110 the place ahead, the air outlet 221 orientation of air-out section 220 the. Through the mode that sets up ventilation pipe 200 in the fume chamber, it gets into from single import to reach the dust, raise dust in the prevention experimentation, the inside wall that operation chamber 110 was hugged closely to the side of ventilation pipe 200 is in order to reserve more operating space simultaneously, air intake 211 is towards the place ahead, can guarantee that the stroke of dust when getting into ventilation pipe 200 is the shortest, increase dust collection efficiency, the bottom surface that operation chamber 110 was hugged closely to the bottom surface of air inlet section 210 can make the dust get into from the bottom surface of operation chamber 110, prevent that the dust from raising.

It should be noted that the operation chamber 110 is rectangular, the width of the outer contour of the vent pipe 200 in the left-right direction is 1mm to 2mm smaller than the width of the rectangle of the operation chamber 110 in the left-right direction, and the height of the outer contour of the vent pipe 200 in the vertical direction is 1mm to 2mm smaller than the height of the rectangle of the operation chamber 110 in the vertical direction, that is, the vent pipe 200 can fill the operation chamber 110 and reduce the gap at the contact position of the operation chamber 110 and the vent pipe 200.

It should be noted that the air outlet 221 is circular, the air inlet 211 is rectangular, and the rectangular air inlet 211 can ensure the dust suction width, that is, the dust within the width of the operation chamber 110 can enter the air inlet 211; the air outlet 221 is circular so as to be conveniently connected with a dust suction pipe.

In some embodiments, the inner wall of the joint of the air intake section 210 and the flow guide section 250 is provided with a transition arc 230, and the transition arc 230 can prevent dust from accumulating at the joint of the air intake section 210 and the flow guide section 250 to block the ventilation pipe 200. It can be understood that one end of the transition arc surface 230 is connected to the inner bottom surface of the air inlet section 210, and the other end is connected to the inner wall of the rear end of the flow guiding section 250, and both the inner bottom surface of the air inlet section 210 and the inner wall of the rear end of the flow guiding section 250 are tangent to the connection point of the transition arc surface 230; it is noted that the transition arc 230 may also reduce the vortex of the air-dust mixture between the air intake section 210 and the flow guiding section 250, so that the air-dust mixture flows more stably in the ventilation duct 200.

In some embodiments, the area of the air outlet 221 is larger than that of the air inlet 211, so that the dust flow rate at the air inlet 211 is increased and dust collection is facilitated under the same negative pressure, it is understood that when the area of the air inlet 211 is smaller than that of the air outlet 221 under the same negative pressure, the flow rate of the air-dust mixture at the air inlet 211 is increased, according to a continuity equation Q ═ Sv ═ C, where C is a constant, Q is a flow rate, S is a cross-sectional area, and v is a flow rate, that is, when an ideal fluid flows in a constant manner, the volume flow rates of the cross-sections in the pipe are equal; under the same negative pressure, the fluid in the pipe can be ensured to flow constantly, that is, when the air outlet 221 is larger than the air inlet 211, the flow speed of the air-dust mixture at the air inlet 211 is larger than that of the air outlet 221, and it should be understood that although the air-dust mixture is not an ideal fluid, the continuity equation can satisfy the relationship between the cross section and the flow speed.

In some embodiments, the inner wall of the air outlet 221 is provided with a first inclined surface 221a, the first inclined surface 221a is inclined downward from front to back, the first inclined surface 221a can prevent dust from accumulating and blocking the air outlet 221, it is noted that the inclined surface is inclined at an angle of 45 ° to 60 ° as viewed from a left-hand direction, the inclined angle is determined according to the length of the air outlet section 220 in the front-back direction, the first inclined surface 221a is provided because the space of the air outlet section 220 is too large, and compared with the arrangement that the inner wall of the air outlet section 220 near the front end is vertical, the first inclined surface 221a is not easy to collect dust.

In some embodiments, the inner wall of the ventilation pipe 200 is provided with a plurality of flow guiding structures 240, and the flow guiding structures 240 can enable a mixture of dust and air to smoothly flow through the ventilation pipe 200, so as to reduce dust attached to the inner wall of the ventilation pipe 200; when the diversion structure 240 is a diversion trench, the diversion trench plays a role of diversion, and the depth of the diversion trench is between 0.25mm and 0.5 mm; when the flow guiding structure 240 is a flow guiding protruding strip, the channel between two adjacent flow guiding protruding strips plays a role in guiding flow, and the height of the flow guiding protruding strip is between 0.25mm and 0.5 mm.

In some embodiments, the air inlet 211 is provided with a plurality of drainage notches 211b, the plurality of drainage notches 211b are correspondingly connected with a plurality of flow guiding structures 240, the drainage notches 211b are communicated with the operation cavity 110, so as to facilitate the entry of dust in the operation cavity 110, it can be understood that the drainage notches 211b are mainly used for guiding the flow direction of the mixture of air and dust, the mixture of air and dust is normally flowed at the drainage notches 211b, the mixture of air and dust is led out of the operation cavity 110 by the flow guiding structures 240, and the drainage notches 211b are correspondingly connected with the flow guiding structures 240, so that the flow guiding structures 240 can guide the air-dust mixture entering from the drainage notches 211b at the first time.

In some embodiments, a shielding plate 211c is hinged inside the air inlet 211, the shielding plate 211c is used for adjusting the air volume entering from the air inlet 211, that is, the air inlet area of the air inlet 211 is adjustable, and is used for increasing or decreasing the amount of the air-dust mixture entering the ventilation pipe 200 from the air inlet 211, so as to prevent the dust from accumulating due to the excessively large amount of the air-dust mixture entering the ventilation pipe 200, and also prevent the dust from being absorbed in time due to the excessively small amount of the air-dust mixture entering the ventilation pipe 200, in some embodiments, a handle is connected to the left end and/or the right end of the shielding plate 211c, and the handle can conveniently adjust the opening and closing degree of the shielding plate, and it should be understood that the handle is arranged outside the cabinet 100; the cabinet 100 is further provided with a stopper for stopping the handle to maintain the position of the shutter 211 c.

In some embodiments, the lower edge of the intake vent 211 is provided with a second inclined surface 211a inclined forward from top to bottom, the second inclined surface 211a can guide dust to enter the ventilation pipe 200 along the inclined surface to prevent the dust from accumulating at the lower edge of the intake vent 211, and the second inclined surface 211a is used for keeping the lower edge of the intake vent 211 and the inner wall of the lower end of the operation chamber 110 in a smooth transition to prevent the dust from accumulating at the lower edge of the intake vent 211 to affect the cleaning of the operation chamber 110.

In some embodiments, the negative pressure fan 300 is further included, an input end of the negative pressure fan 300 is communicated with the air outlet 221, and the negative pressure fan 300 is used for providing negative pressure to suck dust, it should be understood that the power of the negative pressure fan is constant, and the generated negative pressure is not changed.

In some embodiments, the storage bin 400 is further included, the storage bin 400 is disposed at the lower end of the cabinet 100, a door opening 120 is opened in front of the cabinet 100, a cabinet door 130 is slidably connected to the door opening 120, the cabinet door 130 can slide vertically to open and close the door opening 120, the storage bin 400 can be used for storing experimental equipment, and it should be understood that a bin door is connected to the storage bin 400.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A fumehood, comprising:

a cabinet (100) provided with an operating chamber (110);

set up ventilation pipe (200) in operation chamber (110), ventilation pipe (200) are including air inlet section (210), water conservancy diversion section (250) and air-out section (220), air intake (211) orientation of air inlet section (210) operation chamber (110) the place ahead operation station, air outlet (221) orientation of air-out section (220) the vent of cabinet body (100) top.

2. A fumehood according to claim 1 wherein: the inner wall of the joint of the air inlet section (210) and the flow guide section (250) is provided with a transition arc surface (230).

3. A fumehood according to claim 1 wherein: the area of the air outlet (221) is larger than that of the air inlet (211).

4. A fumehood according to any one of claims 1 to 3 wherein: the inner wall of the air outlet (221) is provided with a first inclined plane (221a), and the first inclined plane (221a) inclines downwards from front to back.

5. A fumehood according to claim 1 wherein: the inner wall of the ventilation pipe (200) is provided with a plurality of flow guide structures (240).

6. A fumehood according to claim 5 wherein: the air inlet (211) is provided with a plurality of drainage gaps (211b), and the drainage gaps (211b) are connected with the flow guide structures (240) in a one-to-one correspondence mode.

7. A fumehood according to claim 5 or 6 wherein: a shielding plate (211c) is hinged in the air inlet (211), and the shielding plate (211c) is used for adjusting the air volume entering from the air inlet (211).

8. A fumehood according to claim 5 or 6 wherein: the lower edge of the air inlet (211) is provided with a second inclined surface (211a) which inclines forwards from top to bottom.

9. A fumehood according to claim 1 wherein: still include negative-pressure air fan (300), negative-pressure air fan (300)'s input intercommunication air outlet (221), negative-pressure air fan (300) are used for absorbing the dust.

10. A fumehood according to claim 1 wherein: still include storage bin (400), storage bin (400) set up the lower extreme of the cabinet body (100), door opening (120) have been seted up in the place ahead of the cabinet body (100), sliding connection has cabinet door (130) on door opening (120), cabinet door (130) can open and close along vertical slip door opening (120).