CN217857913U - Upper air supplementing module and ventilation cabinet - Google Patents

Abstract

The utility model discloses an go up air supplement module, include: the upper air supply box body extends along the width direction and comprises an upper inner air supply port and an upper outer air supply port, the upper inner air supply port is used for being arranged towards a working cavity of the fume hood, and the upper outer air supply port is used for being arranged towards the lower part of the working cavity of the fume hood; the upper air supplementing box body is provided with an upper air supplementing air cavity and an air inlet communicated with the upper air supplementing air cavity, the upper air supplementing air cavity is provided with a pore plate, and outside air enters the upper air supplementing air cavity from the air inlet and flows out of the upper air supplementing box body through the pore plate by the upper inner air supplementing opening and the upper outer air supplementing opening respectively. The utility model discloses can clean and dilute the inboard pollutant of window, prevent that the pollutant from passing through the bypass excessive. The utility model also provides a fume chamber.

Description

Upper air supplement module and ventilation cabinet

Technical Field

The utility model relates to a ventilation technology field, in particular to go up tonifying qi wind module and fume chamber.

Background

The ventilation device can be generally described as a device for exhausting gases such as exhaust gas, harmful gas and particulate matter in a working space to the outside of the working space (usually, the outside), and the device has a wide application in industry and life, for example, a factory building for generating toxic and harmful or particulate matter gas in industrial production, a biological and chemical laboratory of research and development institutions, a kitchen for generating oil smoke in cooking, and other occasions, the ventilation device is required to isolate toxic gas and particulate matter in a certain working space from users, prevent the users from inhaling the toxic and harmful gas and particulate matter, and exhaust the toxic and harmful gas and particulate matter to the outside.

Fume hoods are important devices in laboratories for the control of pollutants. The function of the ventilation cabinet is to control pollutants emitted in the cabinet and enable the pollutants to be smoothly discharged outdoors without being dissipated indoors through the operation opening of the ventilation cabinet, so that the health and the safety of experimenters are harmed.

However, the existing fume hood has the phenomenon of pollutant overflow.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the pollutant is excessive in the fume chamber. The utility model provides a fume chamber goes up outer mend wind gap and does not mend the wind from the window outward, can clean and dilute the inboard pollutant of window for top bypass air inlet speed prevents that the pollutant from passing through the bypass excessive, eliminates the inertia and flows the inboard gathering of window.

In order to solve the technical problem, an embodiment of the utility model discloses an go up air supplement module, include: the upper air supply box body extends along the width direction and comprises an upper inner air supply port and an upper outer air supply port, the upper inner air supply port is used for being arranged towards a working cavity of the fume hood, and the upper outer air supply port is used for being arranged towards the lower part of the working cavity of the fume hood; the upper air supply box body is provided with an upper air supply cavity and an air inlet communicated with the upper air supply cavity, the upper air supply cavity is provided with a pore plate, and outside air enters the upper air supply cavity from the air inlet and flows out of the upper air supply box body through the pore plate by the upper inner air supply port and the upper outer air supply port respectively.

By adopting the technical scheme, the upper outer air supply port does not supply air from the outside of the window, so that pollutants on the inner side of the window can be cleaned and diluted, the air inlet speed of the top bypass is increased, the pollutants are prevented from overflowing through the bypass, and the accumulation of inert flow on the inner side of the window is eliminated.

According to the utility model discloses a another embodiment, the orifice plate go up interior air supply inlet with go up outer air supply inlet and follow respectively the width direction extends.

According to another embodiment of the present invention, the upper air supply chamber comprises a first upper air supply chamber and a second upper air supply chamber, the air inlet is communicated with the first upper air supply chamber, and the upper inner air supply port and the upper outer air supply port are respectively communicated with the second upper air supply chamber; the pore plate comprises a guide plate, and the guide plate is positioned between the first upper air supplementing air cavity and the second upper air supplementing air cavity; outside air enters the first upper air supply cavity from the air inlet, enters the second upper air supply cavity after passing through the guide plate, and flows out of the upper air supply box body from the upper inner air supply port and the upper outer air supply port respectively.

According to another specific embodiment of the present invention, the box body comprises a top plate, an arc plate, a connecting plate and a bottom plate, the arc plate is arranged facing the inner cavity, the connecting plate extends along the height direction and is arranged opposite to the inner cavity, the upper inner air supply opening is arranged on the arc plate, and the upper outer air supply opening is arranged on the bottom plate;

along the height direction, the air inlet is arranged on the top plate, and the second upper air supplementing air cavity is positioned below the first upper air supplementing air cavity;

the guide plate includes first slope section, first slope section tilt up with the connecting plate is connected, first slope section is equipped with a plurality of wind holes of straining.

According to the utility model discloses a further embodiment, along direction of height, first slope section with the air intake setting of staggering, first slope section with go up outer air supplement mouth and set up relatively.

According to the utility model discloses a another embodiment, the guide plate includes straight section, straight section with first slope section not with the one end that the connecting plate is connected, straight section with first slope section is the obtuse angle setting.

According to another embodiment of the present invention, the angle between the extension line of the straight section and the extension line of the first inclined section is α, and α is greater than or equal to 20 ° and less than or equal to 80 °.

According to the utility model discloses a further concrete implementation mode, the crossing point of the extension line of straight section and the extension line of first slope section reaches the distance of connecting plate is W, and 30mm is ≤ W and ≤ 150mm.

According to the utility model discloses a further concrete implementation mode, the guide plate still includes the second slope section, the second slope section tilt up with the arc is connected, the both ends of straight section respectively with first slope section with the second slope section is connected.

According to the utility model discloses a further embodiment, along direction of height, the air intake is located second slope section top.

According to the utility model discloses a another embodiment still includes and mends wind chamber on the third, mend wind chamber on the third with mend wind chamber intercommunication on the second, the orifice plate still includes and mends wind filter plate, it is located to go up to mend wind filter plate mend wind chamber on the second with between the wind chamber of mending on the third.

According to the utility model discloses a another embodiment, the bottom plate is the protruding extension passageway that is equipped with still downwards, extend the inner chamber formation third of passageway and go up the air supply chamber, the third go up the air supply chamber with air supply chamber intercommunication on the second, the tip that extends the passageway is equipped with go up out the wind gap.

According to the utility model discloses a another embodiment, along the direction of height, a plurality of the wind holes of straining of guide plate go up the tonifying wind strain the aerofoil and go up the wind gap one-to-one.

According to the utility model discloses a further concrete implementation mode, the air output in tonifying qi wind chamber on the second is greater than the air output in tonifying qi wind chamber on the third.

According to the utility model discloses a further concrete implementation mode, go up interior air outlet's trompil area and be in go up the trompil area of going out the air outlet 1.5 times to 4 times.

According to the utility model discloses a further embodiment, go up tonifying qi wind filter plate one end with the connecting plate is connected, the other end with the bottom plate is connected.

According to the utility model discloses a further embodiment, go up mend wind and strain the aerofoil overlap joint in the bottom plate, and perpendicular to the connecting plate, extend the passageway by go up mend wind strain the aerofoil with the connecting plate respectively with go up mend wind and strain the junction downwardly extending of aerofoil, just extend a lateral wall of passageway with the connecting plate is in the coplanar.

According to another embodiment of the present invention, the extension passage is in an inverted trapezoidal shape and extends in the height direction.

According to the utility model discloses a further embodiment, the guide plate is followed width direction extend to with the end plate of box connect with the roof the arc with the connecting plate encloses into first last tonifying wind chamber, it strains the wind board edge to go up tonifying wind width direction extend to with the end plate of box connect with the guide plate the arc the bottom plate with the connecting plate encloses into tonifying wind chamber on the second, it strains the wind board edge to go up tonifying wind width direction extend to with the end plate of box connect with extend the passageway and enclose into on the third tonifying wind chamber.

The present application further provides a fume hood, including: the cabinet body is provided with an inner cavity, the inner cavity forms a working cavity, and a front opening which is opened to an indoor environment is formed in the front side of the inner cavity; the air supplementing system is used for supplementing air to the fume hood; the upper air supplement module is arranged on the top side of the inner cavity and communicated with the air supplement system.

According to the utility model discloses another concrete embodiment still includes:

the partition piece is arranged at the front opening, positioned on the top side of the inner cavity and arranged at intervals with the bottom side of the inner cavity along the height direction of the cabinet body;

the window is arranged on the outer side of the partition piece, can move upwards or downwards along the height direction, is arranged at intervals with the partition piece along the depth direction of the cabinet body, and forms a partition passage, and the partition passage is communicated with the inner cavity;

the upper inner air supply port faces the working cavity, and the upper outer air supply port faces the partition passage.

In some possible embodiments, no partition may be provided.

According to another specific embodiment of the present invention, the exhaust device further comprises a lower flow guide plate, a middle flow guide plate and an upper flow guide plate arranged along the height direction, wherein the lower flow guide plate, the middle flow guide plate and the upper flow guide plate are arranged at an interval with the rear lining of the inner cavity to form an exhaust channel, and the exhaust channel is communicated with the exhaust system;

the lower section guide plate and the middle section guide plate are provided with a plurality of through holes;

the upper-section guide plate comprises an extension section, the extension section is positioned between the rear lining plate and the middle-section guide plate, and the projection of the extension section is overlapped with the projection of the middle-section guide plate along the depth direction of the ventilation cabinet;

along the depth direction, the extension section and the middle section guide plate are arranged at intervals to form a rotary channel, and the rotary channel extends along the height direction and is communicated with the exhaust channel.

Drawings

Fig. 1 shows a first front view of a fume hood according to an embodiment of the present invention;

fig. 2 shows a first side view of a fume hood according to an embodiment of the present invention;

fig. 3 shows a first cross-sectional view of a fume hood according to an embodiment of the present invention;

fig. 4 shows a second cross-sectional view of a fume hood according to an embodiment of the present invention;

fig. 5 shows a second side view of a fume hood according to an embodiment of the present invention;

fig. 6 shows a first perspective view of an air supplement module in a fume hood according to an embodiment of the present invention;

fig. 7 shows a cross-sectional view of an upper air supplement module in a fume hood in accordance with an embodiment of the present invention;

fig. 8 shows a side view of an upper air supplement module in a fume hood according to an embodiment of the present invention;

fig. 9 is a second perspective view of the air supplement module in the fume chamber according to the embodiment of the present invention;

fig. 10 is a perspective view of the air supply duct and the block of the air pillow in the fume chamber according to the embodiment of the present invention;

fig. 11 shows a third perspective view of the air supplement module in the fume chamber according to the embodiment of the present invention;

fig. 12 shows a first top view of a fume hood according to an embodiment of the present invention;

fig. 13 is an enlarged view of a portion a in fig. 12;

fig. 14 shows a fourth perspective view of an air supplement module in a fume hood according to an embodiment of the present invention;

fig. 15 shows a second top view of a fume hood according to an embodiment of the present invention;

fig. 16 is an enlarged view of portion B of fig. 15;

fig. 17 shows a side view of a baffle in a fume hood in accordance with an embodiment of the present invention;

fig. 18 shows a schematic view of the airflow structure in a fume hood according to an embodiment of the present invention.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to only those embodiments. On the contrary, the intention of implementing the novel features described in connection with the embodiments is to cover alternatives or modifications as may be included in the appended claims. In the following description, numerous specific details are included to provide a thorough understanding of the invention. The invention may be practiced without these particulars. Furthermore, some of the specific details are omitted from the description so as not to obscure or obscure the present invention. It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the present invention is usually placed when the present invention is used, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1 to 5, the present application provides a fumehood 1 comprising a cabinet body 10. The cabinet 10 has a top inner liner 101, a bottom inner liner 102, a rear inner liner 103, a left inner liner 105 (see fig. 17), a right inner liner 104. Among them, the top and bottom lining plates 101 and 102 are disposed opposite to each other in the height direction (the Z direction in fig. 1 to 5) of the hood 1, the left and right lining plates 105 and 104 are disposed opposite to each other in the width direction (the X direction in fig. 1) of the hood 1, and the top lining plate 101 is located on the rear side of the hood 1 in the depth direction (the Z direction in fig. 2 to 4) of the hood 1. The top inner liner plate 101, the bottom inner liner plate 102, the rear inner liner plate 103, the left inner liner plate 105, and the right inner liner plate 104 enclose an inner cavity S of the cabinet body 10, the inner cavity S constitutes a working chamber (S shown in fig. 2, 3, and 5) of the hood 1, and a front opening 1a opened to an indoor environment is formed on a front side (a side facing the rear inner liner plate 103 in a depth direction) of the inner cavity S. Illustratively, the front opening 1a serves as an operation opening.

Illustratively, in the present embodiment, a bottom cabinet 13 is disposed below the cabinet 10 (i.e., below the inner cavity S), and the bottom cabinet 13 can be used for storing reagents and materials required for experiments. In fig. 1, three bottom cabinets 13 are shown below the cabinet 10, but the number of the bottom cabinets 13 is not limited to this, and a corresponding number of bottom cabinets 13 may be provided according to actual use requirements.

When the hood 1 is placed in an indoor environment, a user works to face the front opening 1a of the cabinet 10, and a partition 13 and a window 14 are provided at the front opening 1a of the cabinet 10. Referring to fig. 2 to 5, the partition 13 extends in the width direction of the cabinet 10 (see fig. 3 and 4), is located on the top side of the interior S (below the top interior lining 101), and is spaced from the bottom side of the interior S (e.g., the bottom interior lining 102) in the height direction of the cabinet 10. In fig. 5, the partition 13 is shown as being inclined. In some possible embodiments, the partition 13 is arranged standing in the height direction. Illustratively, the partition 13 is connected to the left and right inner lining plates 105 and 104 in the width direction. The partition 13 is exemplarily a partition glass.

The window 14 is provided outside the partition 13, and the window 14 can move upward in the height direction of the cabinet 10 to open the front opening 1a, or the window 14 can move downward in the height direction of the cabinet 10. That is, the window 14 can move upward or downward relative to the partition 13 in the height direction of the cabinet 10. In this embodiment, the viewing windows 14 and the partition members 13 are spaced apart from each other in the depth direction of the cabinet 10, and a partition passage P1 (bypass) is formed, and the partition passage P1 is communicated with the inner cavity S. The partition passage P1 extends in the width direction of the hood 1 (shown in fig. 3 and 4).

In some possible embodiments, referring to fig. 3 and 4, the fumehood 1 of the present application further comprises a door lintel plate 141, the door lintel plate 141 being located on top of the exterior side of the window 14 of the cabinet 10. I.e. in the depth direction, the viewing window 14 is located between the partition 13 and the door lintel plate 141.

With continued reference to fig. 2-5, the fumehood 1 of the present application further comprises an air make-up system 40 and an air exhaust system 50. The air supply system 40 is used for supplying air to the inner cavity S of the ventilation hood 1 (for example, air is supplied to each air supply module, and the supply air flow is shown as B). The exhaust system 50 is for exhausting air (exhaust airflow is shown as P) from the working chamber through the air (shown as Q1 in fig. 5) which enters the working chamber through the front opening 1a, and air (shown as Q2, Q3, Q4, and Q5 in fig. 5) which enters the working chamber and a later-described partition passage P1 through the air supply system 40. Wherein Q4 is from a side wind module (e.g., a pillar) described later in detail.

In the embodiment of the present application, the fume hood 1 further includes an upper air supplement module 20 and a lower air supplement module 30. Wherein, the upper air supplement module 20 is arranged at the top side of the inner cavity S (for example, below the top lining plate 101) and is communicated with the air supplement system 40, the upper air supplement module 20 comprises an upper inner air supplement opening 21 and an upper outer air supplement opening 22, the upper inner air supplement opening 21 is arranged towards the working cavity and is positioned in the space between the rear lining plate 103 and the partition 13; the upper outer air supply opening 22 is disposed toward the partition passage P1, and the upper outer air supply opening 22 is exemplarily located in the partition passage P1. Illustratively, the above-described upper inner and outer air supply ports 21 and 22 extend in the width direction of the hood 1, respectively.

Illustratively, the upper inner air supply port 21 can supply air obliquely downward or horizontally or vertically downward toward the inside of the working chamber in the width direction (indicated by Q2 and Q6 in fig. 5). Set up like this, inner chamber S upper portion forms the circulation guide way, reduces the vortex, pushes away the vortex to the back of the cabinet body 10, makes it keep away from the user to accelerate the blowdown efficiency at top, shorten pollutant dwell time, reduce the high density gathering of pollutant.

This application has set up outer air supply mouth 22, and on the width direction, it can be to cutting off passageway P1 air supply (Q5 shows in fig. 5) to go up outer air supply mouth 22, that is to say, the window 14 outside of fume chamber 1 of this application does not set up the structure of mending wind, goes up outer air supply mouth 22 and does not mend wind from window 14 outside, but follows the wall passageway P1 between window 14 and the wall piece 13 and mends wind. After setting up like this, the air supply of going up outer air supply mouth 22 can clean and dilute the inboard pollutant of window 14 for top bypass (cut off passageway P1) air inlet speed prevents that the pollutant from overflowing through the bypass, eliminates the inertia and flows the inboard gathering at window 14, promotes the security that the user used fume chamber 1.

In some possible embodiments, the height of the upper outer tuyere 22 to the bottom side of the inner cavity S is between 750mm and 1600mm in the height direction. The wind speed of the upper external air supply port 22 is between 0.3m/s and 1.5 m/s. After the arrangement, the air flow (air curtain or air curtain) provided by the upper outer air supply opening 22 to the partition passage P1 does not influence the surface air speed, and the pollutants emitted in the cabinet can be smoothly discharged outdoors while the pollutants are prevented from overflowing through the bypass, and can not be dissipated indoors through the operation opening of the fume hood 1, so that the health and the safety of experimenters are harmed.

The lower air supply module 30 is disposed at the bottom side of the inner cavity S and is communicated with the air supply system 40. Illustratively, the lower air supplement module 30 is spaced apart from the partition passage P1 in the height direction. The lower air supply module 30 includes a lower air supply opening 31, the lower air supply opening 31 extends along the width direction, and the lower air supply opening 31 is at least arranged towards the working cavity. Illustratively, the lower air supply opening 31 can supply air obliquely upward, horizontally or vertically downward toward the inside of the working chamber (indicated by Q3 in fig. 5).

Referring to fig. 6, the sources of the supplementary wind within the working chamber of the present application include: an upper outer air supply port 22, an upper inner air supply port 21, a lower air supply port 31 and a front opening 1a. Illustratively, the air supplement amount of the upper inner air supplement port 21 accounts for 25%, the air supplement amount of the upper outer air supplement port 22 accounts for 15%, and the air supplement amount of the lower air supplement port 31 accounts for 50%.

Since the upper inner air supply port 21, the upper outer air supply port 22, and the lower air supply port 31 extend in the left-right width direction of the working chamber, air can be uniformly discharged, and the formation of turbulence can be prevented. Reduce the risk that operating personnel inhales harmful substance, the wind that each supply air gap blew out has formed "air barrier", can play the effect of buffering the environment air outside work intracavity and the cabinet, effectively prevents the overflow risk. Meanwhile, after the air supply ports are arranged, the air quantity sent from the front opening 1a can be reduced, so that the energy consumption of an air conditioner is reduced, and the risk of air overflow in the working cavity is greatly reduced because a stable push-pull type air flow mode can be established in the working cavity due to the arrangement of the upper inner air supply port 21.

The structure of the upper wind compensating module 20 will be described in detail below.

In some possible embodiments, with reference to fig. 7 to 9, the upper wind supplementing module 20 comprises: an upper air supply box body. Illustratively, referring to fig. 5, the upper supply box is disposed between the partition 13 and the top lining 101 of the cavity S, the partition 13 supporting the upper supply box. However, the present invention is not limited thereto, and any mounting method that can mount the upper air supply box body to the top lining plate 101 of the inner cavity S and realize air supply to the working cavity and the partition passage P1 falls within the scope of the present invention. For example, the upper air supplement box body is connected with the left lining plate and the right lining plate along the width direction.

The upper air supplementing box body is provided with an upper air supplementing air cavity (for example, a first upper air supplementing air cavity S1, a second upper air supplementing air cavity S2 and a third upper air supplementing air cavity S3 which are described later) and an upper air supplementing air inlet 2011 communicated with the upper air supplementing air cavity, the upper air supplementing air cavity is provided with a pore plate (including a guide plate 205 and an upper air supplementing air filtering plate 206 which are described later), outside air enters the upper air supplementing air cavity from the upper air supplementing air inlet 2011, and the outside air flows out of the upper air supplementing box body from an upper inner air supplementing opening 21 and an upper outer air supplementing opening 22 respectively after passing through the pore plate. That is, the upper air supplement module 20 of the present application is a box structure, and the box has an upper air supplement air cavity, and after the external air enters the upper air supplement air cavity from the upper air supplement air inlet 2011, the external air is uniformly discharged from the upper inner air supplement port 21 and the upper outer air supplement port 22 through the steady flow effect of the orifice plate.

In the present application, fig. 7 and 8 show that the upper air supply chamber of the upper air supply box body is one and extends in the width direction. In some possible embodiments, the upper wind compensation cavity of the upper wind compensation box body can be multiple, such as two, three, four, etc.

As shown in fig. 7 and 9, the upper air supply box and the orifice plate (including a guide plate 205 and an upper air supply and filter plate 206 described later) extend in the width direction of the hood 1.

Referring to fig. 7 and 8, in the embodiment of the present application, the upper air supplement cavities include a first upper air supplement cavity S1, a second upper air supplement cavity S2, and a third upper air supplement cavity S3. Namely, the upper air supplementing air cavity comprises three air cavities. The upper air supplementing inlet 2011 is arranged in the first upper air supplementing cavity S1 and is communicated with the first upper air supplementing cavity S1; the upper inner air supply port 21 is arranged in the second upper air supply air cavity S2 and is communicated with the second upper air supply air cavity S2; the upper outer air supply port 22 is arranged in the third upper air supply cavity S3 and is communicated with the third upper air supply cavity S3. Along the height direction (shown in the direction Z in fig. 8), the second upper air supplementing cavity S2 is positioned between the first upper air supplementing cavity S1 and the third upper air supplementing cavity S3, and the first upper air supplementing cavity S1, the second upper air supplementing cavity S2 and the third upper air supplementing cavity S3 are communicated.

The orifice plate includes guide plate 205 and the last wind board 206 of straining that mends, is equipped with a plurality of first wind holes 20531 of straining that distribute along the width direction on the guide plate 205, and it strains wind hole 2061 to be equipped with a plurality of second that distribute along the width direction on the wind board 206 is strained to last mending. Along the height direction, the guide plate 205 is positioned between the first upper air supplementing air cavity S1 and the second upper air supplementing air cavity S2; the external air enters the first upper air supply cavity S1 through the upper air supply inlet 2011, and the upper air supply filter plate 206 is located between the second upper air supply cavity S2 and the third upper air supply cavity S3. That is, the guide plate 205 and the upper air supply and filter plate 206 divide the upper air supply chamber into a first upper air supply chamber S1, a second upper air supply chamber S2, and a third upper air supply chamber S3.

Outside air from the air supply system 40 enters the first upper air supply chamber S1 from the upper air supply inlet 2011, flows along the guide plate 205 and passes through the first air filtering hole 20531 on the guide plate 205 to reach the second upper air supply, and in the first upper air supply chamber S1, the air speed is reduced, and dynamic pressure is converted into static pressure, so that the pressure stabilizing effect is achieved. Under the action of static pressure, the air quantity uniformly passes through the air filtering holes in the guide plate 205, and the air coming out of the air filtering holes in the guide plate 205 reaches uniform air speed in the width direction.

After the air volume reaches the second upper air supplementing air cavity S2, most of the air volume is discharged from the upper inner air outlet and enters the working cavity, and a small part of the air volume reaches the third upper air supplementing air cavity S3 through the second air filtering hole 2061 on the upper air supplementing air filtering plate 206. Namely, the air output of the second upper air supplementing cavity S2 is greater than that of the third upper air supplementing cavity S3. That is, the air volume of the upper outer air outlet is smaller than that of the upper inner air outlet. By the arrangement, the surface wind speed can not be influenced. For example, the amount of air passing through the upper air supplement filter 206 may be determined by the density of the perforation arrangement on the upper air supplement filter 206. In some possible embodiments, the open area of the upper inner air outlet is 1.5 to 4 times the open area of the upper outer air outlet.

The air quantity reaching the third upper air supplementing cavity S3 is discharged from an upper air outlet and enters the partition passage P1.

In some possible embodiments, the upper wind compensation cavity is not limited to three wind cavities, and may be a greater number of wind cavities, for example, four wind cavities, or a fewer number of wind cavities, for example, two wind cavities. In some possible embodiments, the upper wind compensation cavity includes a first upper wind compensation cavity S1 and a second upper wind compensation cavity S2, for example, the upper wind compensation filter plate 206 in fig. 8 is removed, and the original second wind cavity and the original third wind cavity are combined into one wind cavity. The upper inner air supply port 21 and the upper outer air supply port 22 are both arranged in the second upper air supply chamber S2 and are respectively communicated with the second upper air supply chamber S2.

Thus, the orifice plate includes a baffle 205, the baffle 205 being located between the first upper air replenishing cavity S1 and the second upper air replenishing cavity S2; outside air enters the first upper air supplementing air cavity S1 from the upper air supplementing air inlet 2011, enters the second upper air supplementing air cavity S2 after passing through the guide plate 205, and flows out of the upper air supplementing box body from the upper inner air supplementing opening 21 and the upper outer air supplementing opening 22 respectively.

The embodiment of the application is illustrated by taking three air cavities as examples.

In some possible embodiments, one or more of the first upper wind supplement cavity S1, the second upper wind supplement cavity S2 or the third upper wind supplement cavity S3 may be formed by a plurality of sub-cavities.

With continued reference to fig. 7 to 9, the upper air supply box body of the present application includes a top plate 201, an arc-shaped plate 202, a connecting plate 204 and a bottom plate 203, the arc-shaped plate 202 is disposed facing the inner cavity S, the connecting plate 204 extends along the height direction and is disposed opposite to the inner cavity S, the upper inner air supply opening 21 is disposed on the arc-shaped plate 202, and the upper outer air supply opening 22 is disposed on the bottom plate 203; along the direction of height, roof 201 is located to last tonifying wind air intake 2011, and tonifying wind chamber S2 is located first upper tonifying wind chamber S1 below on the second.

As shown in fig. 7 and 8, the flow guide plate 205 extends in the width direction to be connected with the end plate 208 of the box to enclose a first upper air supply chamber S1 with the top plate 201, the arc plate 202 and the connecting plate 204, the upper air supply filter plate 206 extends in the width direction to be connected with the end plate 208 of the box to enclose a second upper air supply chamber S2 with the flow guide plate 205, the arc plate 202, the bottom plate 203 and the connecting plate 204, and the upper air supply filter plate 206 extends in the width direction to be connected with the end plate 208 of the box to enclose a third upper air supply chamber S3 with the extending channel 207.

In some possible embodiments, the deflector 205 comprises a first inclined section 2053, the first inclined section 2053 is inclined upwards and connected to the connection plate 204, and the first inclined section 2053 is provided with a plurality of first air filtering holes 20531. The first wind hole 20531 of straining of guide plate 205 is located first slope section 2053, can prevent that wind from blowing to first wind hole 20531, and wind sweeps on connecting plate 204 from the first wind hole 20531 board of straining on the first slope section 2053 board outflow back, plays the stationary flow effect.

The bottom plate 203 is further provided with an extending channel 207 protruding downward, an inner cavity S of the extending channel 207 forms a third upper air supply cavity S3, the third upper air supply cavity S3 is communicated with the second upper air supply cavity S2, and an upper air outlet and an outer air outlet are arranged at the end of the extending channel 207. Illustratively, the extended passage 207 is located in the partition passage P1, so as to sufficiently clean and dilute the pollutants inside the window 14, accelerate the top bypass air intake speed, prevent the pollutants from overflowing through the bypass, eliminate the accumulation of inert flow inside the window 14, and further make the structure of the fume hood 1 compact.

Illustratively, along the height direction, the first inclined section 2053 is arranged to be staggered with the upper air supply inlet 2011, and the first inclined section 2053 is arranged to be opposite to the upper outer air supply inlet 22. That is, the upper air supplement inlet 2011 is not disposed directly opposite to the first inclined section 2053, so that the air can be prevented from directly blowing the first air filtering hole 20531 on the first inclined section 2053, and the air outlet is uniform. Meanwhile, along the height direction, the plurality of first air filtering holes 20531, the upper air supplementing and filtering plate 206, and the upper air outlet of the first inclined section 2053 correspond one to one. Under the action of static pressure, the wind coming out of the second wind filtering holes 2061 on the upper wind supplementing and filtering plate 206 reaches uniform wind speed in the width direction, and then the wind speed blown to the partition passage P1 from the upper air outlet is uniform, so that the surface wind speed is not influenced. The air outlet quantity of the upper air outlet and the lower air outlet can be adjusted.

Illustratively, the upper air inlet 2011 is disposed at an end of the top plate 201 near the inner cavity S. For example, as shown in fig. 8, the upper inlet 2011 is located on the left side of the upper inlet box and the first angled segment 2053 is located on the right side of the upper inlet box. After setting up like this, outside air can flow along the depth direction after getting into first air cavity S1 of supplying air from last air inlet 2011 of supplying air, and to first wind hole 20531 of straining on the first slope section 2053 for outside air has prolonged at the first interior flow distance of air cavity S1 of supplying air, and this does benefit to the air-out of first wind hole 20531 of straining.

Illustratively, the baffle 205 further includes a straight section 2052, the straight section 2052 is connected to an end of the first inclined section 2053 that is not connected to the connection plate 204, and the straight section 2052 and the first inclined section 2053 are disposed at an obtuse angle (a supplementary angle α in fig. 8). Illustratively, the straight section 2052 of the baffle 205 is parallel to the top plate 201.

In some possible embodiments, the angle between the extension of the straight section 2052 and the extension of the first angled section 2053 is α,20 ≦ α ≦ 80. Within this parameter range, the air outlet of the first air filtering holes 20531 can be uniform.

In some possible embodiments, referring to FIG. 8, the distance W from the connection plate 204 to the intersection of the extension of the straight segment 2052 and the extension of the first inclined segment 2053 (shown as O in FIG. 8) is 30mm ≦ W ≦ 150mm. With such an arrangement, the air outlet of the first air filtering hole 20531 can be uniform.

In some possible embodiments, the baffle 205 further includes a second inclined segment 2051, the second inclined segment 2051 is inclined upward to connect with the arc-shaped plate 202, and two ends of the straight segment 2052 are respectively connected with the first inclined segment 2053 and the second inclined segment 2051. Illustratively, the upwind inlet 2011 is located above the second inclined section 2051 in the height direction. After the arrangement, the outside air enters the first upper air supplementing air cavity S1 from the upper air supplementing air inlet 2011, and falls down along the inclined plane of the second inclined section 2051, so that the resistance loss is reduced, and the flow of the air to the first inclined section 2053 is facilitated.

In some possible embodiments, the upper air supplement and filter plate 206 is connected to the connecting plate 204 at one end and to the bottom plate 203 at the other end. The upper air supplement and filter plate 206 is overlapped on the bottom plate 203 and is perpendicular to the connecting plate 204, the extending channel 207 extends downwards from the connection part of the upper air supplement and filter plate 206 and the connecting plate 204 with the upper air supplement and filter plate 206 respectively, and a side wall of the extending channel 207 (the right side wall of the extending channel 207 shown in fig. 8) is in the same plane with the connecting plate 204. The left side wall of the extension channel 207 is shown in fig. 8 as being connected to the bottom plate 203 and extending downward. Illustratively, the extended channel 207 has an inverted trapezoidal shape. It is convenient to extend the extension passage 207 into the partition passage P1.

It should be noted that the structure of the upper air supplement box body in the present application is not limited to the structure shown in fig. 8, and the structure having the upper air supplement air inlet 2011, the upper air supplement air cavity, the upper outer air supplement opening 22, and the upper inner air supplement opening 21 all belong to the protection scope of the present application.

Referring to fig. 7 and 9, the upper air supplement inlet 2011 of the embodiment of the present application is a narrow groove, and the upper air supplement inlet 2011 includes one or more than one. Two upper make-up air intakes 2011 are shown in fig. 9. In some possible embodiments, the number of the upper air inlet 2011 may be more, so as to provide the external air to the upper air inlet cavity.

Referring to fig. 2 to 6 and 9, the air supplement system 40 of the present application includes an air supplement channel 41 disposed at the top of the cabinet 10, an air supplement inlet 411 is disposed at the top of the air supplement channel 41, an air supplement outlet 412 (see fig. 10) is disposed at the bottom of the air supplement channel 41, a top lining plate 101 of the inner cavity S is provided with a first air passing channel 1012, the top lining plate 101 is located between the air supplement channel 41 and the upper air supplement cabinet, and the air supplement outlet 412, the first air passing channel 1012 and the upper air supplement inlet 2011 are communicated. That is, the air supplement enters the air supplement channel 41 from the air supplement inlet 411, flows through the air supplement outlet 412 at the bottom of the air supplement channel 41, the first air passing channel 1012 on the top inner lining plate 101, the upper air supplement inlet 2011, and enters the upper air supplement chamber of the upper air supplement module 20.

In some possible embodiments, referring to fig. 5 and 9, the fume hood 1 further includes a block 1011, and the block 1011 is located between the air supply duct 41 and the top lining 101 along the height direction, and the air supply duct 41 is spaced apart from the top lining 101 and forms a wire passage (for passing cables); the heightening block 1011 is provided with a second air passing channel 10111, and the air supplementing air outlet, the first air passing channel 1012, the second air passing channel 10111 and the upper air supplementing air inlet 2011 are communicated. The air supplement enters the upper air supplement module 20 from the air supplement air outlet 412 at the bottom of the air supplement channel 41 through the heightening block 1011 and the top lining plate 101. The upper surface or the lower surface of the padding block 1011 is contacted with the air supply channel 41 and the top lining plate 101, and the joint surface is pasted with sealing foam.

Due to the fact that the heightening block 1011 is arranged, the air supplementing channel 41 cannot be in large-area contact with the top lining plate 101, cables used by the ventilation cabinet 1 cannot be pressed, and the corresponding cables can be changed when equipment is maintained conveniently.

Referring to fig. 9 and 10, the air compensating outlet 412, the first air passing channel 1012, the second air passing channel 10111 and the upper air compensating inlet 2011 are respectively long and narrow slots, and the air compensating outlet 412, the first air passing channel 1012, the second air passing channel 10111 and the upper air compensating inlet 2011 include one or more than one, and are in one-to-one correspondence. Fig. 9 and 10 show that there are two air compensating outlets 412, two first air passing channels 1012, two second air passing channels 10111 and two upper air compensating inlets 2011, and in the height direction, each air compensating outlet 412, one first air passing channel 1012, one second air passing channel 10111 and one upper air compensating inlet 2011 correspond to each other, so that two independent air compensating paths are formed, and the two independent air compensating paths do not interfere with each other.

Referring to fig. 2 to 6 and 9, the air supplement system 40 of the present application further includes an air inlet channel 42 communicating with the air supplement channel 41, the air inlet channel 42 extends along the height direction, is located at the rear side of the cabinet 10, and is located between the air inlet channel 42 and the lower air supplement opening 31 along the depth direction of the cabinet 10; an adjusting channel 43 extending along the depth direction of the cabinet 10, wherein the adjusting channel 43 has an inlet and an outlet along the depth direction, and the inlet of the adjusting channel 43 is communicated with the outlet of the air inlet channel 42; the upper air supplement module 20 comprises an air outlet channel, a lower air supplement opening 31 is arranged on the air outlet channel, and an inlet of the air outlet channel is connected with an outlet of the adjusting channel 43.

Illustratively, the outside air coming down from the air inlet channel 42 enters the adjusting channel 43, namely enters the large space from the small space, and after passing through a pore plate in the adjusting channel 43, the outside air reduces the influence of jet flow on the nonuniformity of a flow field, converts partial dynamic pressure into static pressure, reduces the speed of the outside air, and finally the air outlet speed of the air outlet is uniform, so that the air can be uniformly supplied to the working cavity of the ventilation cabinet 1 from the lower air supply port 31, and the effects of stabilizing pressure and reducing noise are achieved.

Illustratively, the air intake channel 42 includes a first air intake channel 42 and a second air intake channel 42 arranged at intervals in the width direction, and the two air intake channels 42 respectively extend in the height direction.

Illustratively, the air supplement channel 41 includes a first portion 412, a second portion 413 and a third portion 414 which are sequentially communicated, the first portion 412 is communicated with one of the air inlet channels 42, the air supplement inlet 411 is arranged on the second portion 413, and the third portion 414 is communicated with the other air inlet channel 42. Illustratively, the first portion 412 and the third portion 414 of the wind compensating channel 41 extend in the depth direction, respectively, and the second portion 412 of the extension channel 207 extends in the width direction.

In fluid mechanics: the fluid has the characteristic of viscosity, and the flow speed is fastest in the middle of the pipeline and slowest at the inner wall of the pipeline in the flowing process of the fluid in the pipeline. The reason is that: there is mutual friction between the fluid and the pipe wall, called viscous forces, which impede the flow.

The capture capability is the weakest at the position where the flow velocity is the slowest on the left and right inner side walls (i.e., the left inner lining plate 105 and the right inner lining plate 104) of the through cabinet. Often the location where the contaminant escapes.

To this end, with reference to fig. 6 and 11, the fume hood 1 of the present application further comprises: and the side air supplement module comprises a side air outlet arranged on the rear side facing the inner cavity S, and the side air supplement module is communicated with the air supplement system 40. The side air supply module blows air to the rear side (such as a guide plate 205 described later) facing the inner cavity S to accelerate the flow, namely, the flow velocity of the inner wall surface is accelerated, the idle flow or the backflow is eliminated, and the pollutant catching capacity of the inner wall is enhanced. Therefore, the active air supply structure is additionally arranged on the inner wall, and the risk of pollutant leakage is reduced.

That is, referring to fig. 5 and 6, the source of the supplementary wind in the working chamber of the present application includes: an upper outer air supply port 22 (Q2), an upper inner air supply port 21 (Q2), a lower air supply port 31 (Q3), a front opening 1a (Q1) and a side air outlet (Q4).

Illustratively, the lower and/or upper air supplement modules 30, 20 communicate with the side air supplement module to provide the air supplement flow to the air cavity of the side air supplement module. That is, the lower wind supplement module 30 described in the above embodiment provides the wind cavity of the side wind supplement module with the wind supplement airflow, or the upper wind supplement module 20 described in the above embodiment provides the wind cavity of the side wind supplement module with the wind supplement airflow, or both the lower wind supplement module 30 and the upper wind supplement module 20 described in the above embodiment provide the wind cavity of the side wind supplement module with the wind supplement airflow.

The specific structure of the side air supplement module is described in detail below.

Referring to fig. 1, 6 and 17, the fumehood 1 of the embodiment of the present application further includes a left upright 11 and a right upright 12, and the lower air supplement module 30 is located between the left upright 11 and the right upright 12 along the width direction of the fumehood 1. In the depth direction, the left pillar 11 is located on the front side of the left inner liner 105, and the right pillar 12 is located on the front side of the right inner liner 104. That is, the left inner liner plate 105 is mounted on the side of the left pillar 11 facing the rear side of the cavity S, and the right inner liner plate 104 is mounted on the side of the right pillar 12 facing the rear side of the cavity S.

Referring to fig. 11 to 13, the right column 12 includes a right column first air inlet 1211 and a right column air supply cavity extending in the height direction, a right column air outlet is disposed at a portion of the right column 12 facing the inner cavity S, the right column air supply cavity is communicated with the air supply system 40 through the right column air outlet, and the right column air outlet is communicated with the right column air supply cavity.

The side air supplement module comprises a left upright post air supplement air cavity, a left upright post air outlet and a left upright post first air inlet.

Illustratively, the structure of the left upright 11 and the structure of the right upright 12 are the same. The part of the left upright post 11 facing the inner cavity S is provided with a left upright post air outlet, the left upright post air supplementing cavity is communicated with the air supplementing system 40 through the left upright post air outlet, and the left upright post air outlet is communicated with the left upright post air supplementing cavity.

The side air supplement module comprises a right upright post air supplement air cavity, a right upright post air outlet and a right upright post first air inlet 1211.

That is, in the embodiment of the present application, the left column 11 and the right column 12 form a side air supplement module. In some possible embodiments, the side wind supplement module may be formed by the left upright post 11, or the side wind supplement module may be formed by the right upright post 12. The embodiment of the present application takes the left upright post 11 and the right upright post 12 to form a side air supplement module at the same time as an example.

Referring to fig. 13, the right column 12 further includes a right column side air supplementing and filtering plate 1224 extending in the height direction, the right column side air supplementing and filtering plate 1224 divides the right column air supplementing air cavity into a right column front air supplementing air cavity 122 and a right column rear air supplementing air cavity 121, the right column air outlet communicates with the right column front air supplementing air cavity 122, and the right column first air inlet 1211 communicates with the right column rear air supplementing air cavity 121.

Correspondingly, left stand 11 still includes the left stand side air supplementing and filtering board that extends along the direction of height, and left stand side air supplementing and filtering board separates left stand air supplementing air cavity into left stand front air supplementing air cavity and left stand rear air supplementing air cavity, and left stand air outlet and left stand front air supplementing air cavity intercommunication, left stand first air intake and left stand rear air supplementing air cavity intercommunication.

As shown in fig. 11 and 13, along the width direction, two sides of the lower air supplement module 30 are provided with a left lower air supplement outlet and a right lower air supplement outlet 301; the left upright post first air inlet is arranged on one side of the left upright post 11 facing the downward air supplement module 30, and the left lower air supplement air outlet is communicated with the left upright post first air inlet; the right upright post first air inlet 1211 is arranged at one side of the right upright post 12 facing the downward air supplement module 30, and the right lower air supplement outlet 301 is communicated with the right upright post first air inlet 1211. That is, the lower air supply module 30 supplies the air supply flow to the left and right post rear air supply chambers 121.

Because the lower air supplement module 30 supplements air from the rear side of the fume hood 1, the lower air supplement module 30 can provide one air volume from the air supplement system 40 to the left upright post 11 and the right upright post 12 to form side air supplement, other air supplement systems 40 do not need to be additionally arranged, parts are saved, the structure is compact, and the existing air supplement system 40 is fully utilized to supplement air from the side.

In addition, as shown in fig. 11, the air supplementing channel 41 provides the external air to the adjusting air cavity 431 of the adjusting channel 43 through the air supplementing air inlet 411, and the air provided by the adjusting air cavity 431 to the lower air supplementing module 30 is uniform, so that the air supplementing air flows provided by the lower air supplementing module 30 to the left post rear air supplementing cavity and the right post rear air supplementing air cavity 121 are also uniform, and then the air outlet of the left post air outlet and the air outlet of the right post air outlet are also uniform. The flow velocity of the inner wall surface is accelerated, the idle flow or backflow is eliminated, and the pollutant catching capacity of the inner wall is enhanced. Therefore, the lower wind-supplementing module 30 is combined with the side wind-supplementing module formed by the left upright post 11 and the right upright post 12 in the direction of 1+1 > 2.

With continued reference to fig. 13, the right column 12 includes a first arm 1221, a second arm 1222, and a third arm 1223 arranged at intervals along the width direction (shown in the X direction in fig. 13), the first arm 1221 and the second arm 1222 of the right column 12 clamp the right column vent plate 1225, the right column vent plate 1225 is provided with a plurality of right column air outlets along the height direction, and the first arm 1221, the second arm 1222, the right column vent plate 1225, and the right column side air supplement and filter plate 1224 of the right column 12 enclose the right column front air supplement air chamber 122; the second arm 1222 and the third arm 1223 of the right column 12 sandwich the left inner liner plate 105.

The left upright post 11 comprises a first arm, a second arm and a third arm, the first arm and the second arm of the left upright post 11 clamp a left upright post air outlet hole plate, a plurality of left upright post air outlets are arranged on the left upright post air outlet hole plate along the height direction, and a left upright post front air supply air cavity is enclosed by the first arm, the second arm, the left upright post air outlet hole plate and a left upright post side air supply air filter plate of the left upright post 11; the second arm and the third arm of the left pillar 11 sandwich the left inner liner plate 105.

By the arrangement, the structure of the fume hood 1 is compact, the lower air supplement module 30, the left inner lining plate 105 and the right inner lining plate 104 are clamped by the left upright post 11 and the right upright post 12, and meanwhile, a left upright post front air supplement cavity and a right upright post front air supplement cavity 122 are formed, so that inward air supplement along the left inner lining plate 105 and the right inner lining plate 104 is realized.

The wind enters the first wind inlet 1211 of the right upright post from the lower right wind compensation outlet 301 and reaches the rear wind compensation cavity 121 of the right upright post. In the air supply cavity 121 behind the right upright post, the air speed is reduced, and dynamic pressure is converted into static pressure to play a role in stabilizing pressure. Under the action of static pressure, the air quantity uniformly passes through the right upright post side air supplementing and filtering plate 1224, and the air coming out of the right upright post side air supplementing and filtering plate 1224 reaches uniform air speed in the width direction. The air supplementing and filtering plate 1224 enters the front air supplementing and filtering cavity 122 of the right upright post from the side of the right upright post, and is discharged from the air outlet hole plate 1225 of the right upright post. The right column air outlet hole plate 1225 plays a role in preventing foreign matters from entering the air cavity and further homogenizing the flow. The air volume discharged from the right column air outlet hole plate 1225 plays a role in accelerating the flow velocity of the inner wall surface and eliminating idle flow or backflow.

Similarly, after entering the first air inlet of the left upright post from the lower left air supplementing outlet, the air reaches the rear air supplementing cavity of the left upright post. In the air supply cavity behind the left upright post, the air speed is reduced, and dynamic pressure is converted into static pressure to play a role in stabilizing pressure. Under the action of static pressure, the air quantity uniformly penetrates through the left upright post side air supplementing and filtering plate, and the air coming out of the left upright post side air supplementing and filtering plate reaches uniform air speed in the width direction. And the air supplementing and filtering plate enters the front air supplementing cavity of the left upright post from the left upright post side and is discharged from the air outlet hole plate of the left upright post. The left upright post air outlet hole plate plays a role in preventing foreign matters from entering the air cavity and further realizing uniform flow. The air quantity discharged from the left upright post air outlet hole plate plays the roles of accelerating the flow velocity of the inner wall surface and eliminating idle flow or backflow.

In some possible embodiments, the volume of the left column front air supplement air cavity is smaller than that of the left column rear air supplement air cavity, and the volume of the right column front air supplement air cavity 122 is smaller than that of the right column rear air supplement air cavity 121. Illustratively, the volume of the rear air supply cavity of the left upright post is 1-8 times of the volume of the front air supply cavity of the left upright post; the volume of the right upright post rear air supplement cavity 121 is 1-8 times of the volume of the right upright post rear air supplement cavity 121. After the arrangement, a flow stabilizing effect can be achieved, and air outlet of the left upright post 11 and the right upright post 12 is uniform.

Fig. 11 and 13 show that the lower supplementary air module 30 described by the above embodiment provides supplementary air flow to the air cavities of the left and right uprights 11 and 12.

In other embodiments, referring to fig. 14-16, the upper wind module 20 described by the above embodiments provides a wind supplementing air flow to the wind cavity of the side wind module. The left upright post 11 further comprises a left upright post second air inlet which is positioned above the left upright post first air inlet. The right column 12 further includes a right column second air inlet 1212, and the right column second air inlet 1212 is located above the right column first air inlet 1211.

Referring to fig. 14, along the width direction, two sides of the upper air supplement module 20 are provided with an upper left air supplement outlet 2012 and an upper right air supplement outlet; the second air inlet of the left upright is arranged at one side of the left upright 11 facing the upper air supplementing module 20, and the upper left air supplementing air outlet 2012 is communicated with the second air inlet of the left upright; the right upright post second air inlet 1212 is arranged at one side of the right upright post 12 facing the upward air supplement module 20, and the right upper air supplement air outlet is communicated with the right upright post second air inlet 1212. That is, the upper air supplement module 20 provides the air supplement flow to the left and right post rear air supplement chambers 121.

Because the upper air supplement module 20 is used for supplementing air through the air supplement channel 41, the upper air supplement module 20 can provide one air volume from the air supplement channel 41 to the left upright post 11 and the right upright post 12 to form side air supplement, other air supplement systems 40 do not need to be additionally arranged, parts are saved, the structure is compact, and the existing air supplement systems 40 are fully utilized for side air supplement.

Moreover, fig. 8 shows that the air supply channel 41 supplies the external air to the upper air supply module 20 through the air supply inlet 411, and the supplied air is uniform, so that the air supply flows provided by the upper air supply module 20 to the left post rear air supply chamber and the right post rear air supply chamber 121 are also uniform, and then the air outlet of the left post air outlet and the right post air outlet is also uniform. The flow velocity of the inner wall surface is accelerated, the idle flow or backflow is eliminated, and the pollutant catching capacity of the inner wall is enhanced. Therefore, the upper air supplement module 20 is combined with the side air supplement module formed by the left upright post 11 and the right upright post 12 in the direction, and the effect of 1+1 > 2 is generated.

In some possible embodiments, referring to fig. 2 to 5 and fig. 17, the fume hood 1 of the present application further includes a lower deflector 52, a middle deflector 53 and an upper deflector 54 arranged along the height direction, the lower deflector 52, the middle deflector 53 and the upper deflector 54 are arranged at a distance from the rear inner lining 103 of the cavity S to form an exhaust passage P2, and the exhaust passage P2 is communicated with the exhaust port 51 of the exhaust system 50. Fig. 2 and 3 show that the entire exhaust duct P2 extends in the height direction.

The lower deflector 52 and the middle deflector 53 are provided with a plurality of through holes.

For example, a plurality of lower through holes 521 are provided in most regions of the panel of the lower baffle plate 52, and the lower through holes 521 are distributed in the lateral width direction of the lower baffle plate 52, so that heavy contaminants can be discharged out of the hood 1. Illustratively, along the height direction, within 500mm of the upper part of the table top, which is the main position of the pollutant generation source, the lower segment flow guide plate 52 adds the long groove feature (the lower segment through hole 521), increases the wind speed of the groove, and accelerates the pollutant discharge.

A plurality of middle-section through holes 531 are formed in the lower region of the middle portion of the panel of the middle-section flow guide plate 53, and the plurality of middle-section through holes 531 are distributed in the left-right width direction of the middle-section flow guide plate 53, so that pollutants in the middle region can be discharged out of the fume hood 1. Along the width direction, the middle position is the main position of the pollution generating source, and the middle section flow guide plate 53 is provided with a groove (a middle section through hole 531) to increase the wind speed and accelerate the discharge. The edge corner position reduces the air discharge quantity and has no opening.

For example, no through hole is provided in the upper deflector 54.

By adopting the structure, the average surface wind speed can be reduced, thereby reducing the overall air exhaust quantity requirement. Moreover, the air in the working chamber is guided to the exhaust area to avoid the generation of air vortex, and the through holes on the guide plate 205 are distributed in the whole left and right width direction of the guide plate 205, so that the continuous exhaust of which the whole width surface of the working chamber is basically consistent is provided.

Referring to fig. 2 to 5, in the embodiment of the present application, the upper-stage baffle 54 includes an extension 542, the extension 542 is located between the rear lining plate 103 and the middle-stage baffle 53, and along the depth direction of the fume hood 1, the projection of the extension 542 overlaps with the projection of the middle-stage baffle 53; along the depth direction, the extension section 542 and the middle flow guide plate 53 are arranged at intervals to form a rotary channel P3, and the rotary channel P3 extends along the height direction and is communicated with the exhaust channel P2.

The conventional design of the air deflector 205 is usually to arrange the upper air deflector 54 and the middle air deflector 53 at intervals in the height direction to form an air exhaust gap, or to directly fix and connect them without forming an air exhaust gap. And the air flow in the working chamber rises to form a large vortex at the inner upper part.

Referring to fig. 5 and 18, in the embodiment of the present application, the narrow passage (the turning passage P3) between the upper deflector 54 and the middle deflector 53 is designed to be drawn in a reverse direction (downward movement) by the ascending air flow and then discharged. Rather than a conventional design, causes the airflow to rise, creating a large vortex. That is, the ascending air flow enters the narrow passage (turning passage P3), and H in fig. 5 shows the direction in which the air flow enters the turning passage P3; the air flow enters the narrow passage, then flows downwards, enters the exhaust passage P2, then rises to enter the passage between the upper guide plate 54 and the rear lining plate 103, and is exhausted through the exhaust outlet 51 of the exhaust passage P2.

In some possible embodiments, the depth of the turnaround channel P3 in the height direction is 20mm to 1m. The airflow structure of the inner cavity S can be improved, and the airflow structure forms a stable laminar flow fluid state, so that pollutants can be quickly discharged.

The present application does not limit the specific shape of the turning passage P3, and any structure capable of forming a passage that is reversely (downwardly) drawn using the ascending air flow falls within the scope of the present application.

In some possible embodiments, the extension 542 is angled from-20 ° to 20 ° from the vertical in the height direction, and the middle deflector 53 is angled from-20 ° to 20 ° from the vertical in the height direction. That is, the range in which the extension 542 is inclined 20 ° to the left or 20 ° to the right is the installation position of the extension 542, and the range in which the middle baffle 53 is inclined 20 ° to the left or 20 ° to the right is the installation position of the middle baffle 53.

Fig. 5 shows that the extension 542 and the middle-stage baffle 53 are arranged in parallel. At this time, the angle between the extending section 542 and the vertical line in the height direction is 0 °, and the angle between the middle-stage baffle 53 and the vertical line in the height direction is 0 °.

Illustratively, the width of the turnaround channel P3 is between 10mm and 80mm. By the arrangement, the airflow structure of the inner cavity S can be improved, and the airflow structure forms a stable laminar flow fluid form, so that pollutants can be quickly discharged.

In some possible embodiments, referring to fig. 4 and 5, the rear lining plate 103 is provided with a first connector 15, a second connector 16, and a third connector 17 at intervals in the height direction. Illustratively, the first connecting member 15, the second connecting member 16, and the third connecting member 17 each extend in the depth direction.

Along the height direction, the lower section guide plate 52 is vertically arranged, one end of the lower section guide plate 52 is connected with the first connecting piece 15 and is arranged at intervals with the bottom side of the inner cavity S to form a first exhaust gap communicated with the exhaust channel P2, and the other end of the lower section guide plate 52 is connected with the second connecting piece 16; along the height direction, the middle section guide plate 53 is vertically arranged, one end of the middle section guide plate 53 is connected with the second connecting piece 16, a second air exhaust gap communicated with the air exhaust channel P2 is formed between the middle section guide plate 53 and the lower section guide plate 52, and the other end of the lower section guide plate 52 is connected with the third connecting piece 17; in the height direction, the upper deflector 54 further includes an inclined section 541, one end of the extending section 542 is connected to the third connector 17, the other end of the extending section 542 is connected to one end of the inclined section 541, and the other end of the inclined section 541 is inclined toward the front side of the cavity S and is connected to the top lining plate 101 of the cavity S.

In some possible embodiments, the other end of the inclined section 541 forms a third exhaust gap communicating with the exhaust passage P2 with the top liner plate 101 of the cavity S. The top gas flow can be discharged from this gap, and Q6 in fig. 5 and 18 shows the gas flow entering this gap.

With reference to fig. 17, the lower deflector 52 is provided with a lower exhaust area, and the lower exhaust area includes a plurality of lower through holes 521; the middle section flow guide plate 53 is provided with a middle exhaust area, and the middle exhaust area includes a plurality of middle section through holes 531.

The main cause of leakage from the hood 1 is the lack of good air flow organization inside and outside the hood 1.

To this end, with reference to fig. 18, in another embodiment of the present application, the working chamber of the fume hood 1 is divided into three air flow organization areas from bottom to top along the height direction: A. b and C. In FIG. 18, an air flow organization region A is formed below the dotted line M-M, and an air flow organization region B is formed between the dotted line M-M and the dotted line L-L; an air flow pattern region C is formed above the dotted line L-L in fig. 18.

In the air flow organization region a: at least 80% of the air supplement amount from the lower air supplement module 30 enters the air exhaust channel P2 from the lower air exhaust area and the first air exhaust gap between the lower guide plate 52 and the bottom side of the inner cavity S.

In the air flow organization region B: at least 80% of outdoor air supply quantity from the front opening 1a enters the air exhaust channel P2 from the middle air exhaust area and the second air exhaust gap between the middle flow guide plate 53 and the lower flow guide plate 52.

In the air flow organization region C: at least 80% of the air supplement amount from the upper air supplement module 20 enters the exhaust passage P2 from the rotary passage P3.

Equivalently, the air supply opening of the lower air supply module 30 mainly corresponds to the lower exhaust area on the lower deflector 52, and the air supply opening of the air supply module mainly enters the lower exhaust area of the lower deflector 52. The front opening 1a mainly corresponds to the middle exhaust area on the middle flow guide plate 53, and the air supplement amount of the front opening 1a mainly enters the middle exhaust area of the middle flow guide plate 53. The upper air supplement module 20 mainly corresponds to the rotary passage P3, and the air supplement amount of the upper air supplement module 20 mainly enters the rotary passage P3.

After the arrangement: 1) The air quantity extracted from the window opening (front opening) is reduced by air supplement, so that the purpose of energy saving is achieved; 2) The arrangement of each air supplement port prevents pollutants from overflowing from the window opening, and the air supplement ports are arranged on the upper side and the lower side of the fume hood 1 to prevent pollutants from escaping from the fume hood; 3) Aiming at a plurality of air supply ports and window openings, the guide plate structure of the embodiment of the application is used for ensuring that each air supply port corresponds to an air suction opening on the guide plate; 4) Finally, the stability of the airflow organization is ensured, and the laminar flow state is achieved without turbulence, so that pollutants can be quickly discharged.

The above-mentioned airflow structure can be achieved by adjusting the air discharge ratio of each air deflector 205 in the height direction, and the width and depth of the rotary passage P3, and by the simulation of CFD, thereby improving the airflow structure of the inner cavity S and forming the airflow structure into a stable laminar flow fluid form.

In some possible embodiments, at least 90% of the amount of the supplementary air from the upper inner air supply opening 21 enters the exhaust passage P2 from the third exhaust gap between the other end of the turning passage P3 and the inclined section 541 and the top liner plate 101 of the cavity S; at least 80% of the air supply amount from the upper outer air supply opening 22 enters the air exhaust passage P2 from the rotary passage P3, and the rest enters the air exhaust passage P2 from the middle air exhaust area. By means of the arrangement, the airflow organization of the inner cavity S is further improved, and the leakage of pollutants of the fume hood 1 is prevented.

In some possible embodiments, with continued reference to fig. 17, a lower exhaust opening 55 is provided between the two sides 522 of the other end of the lower deflector 52 and the left and right inner lining plates 105 and 104 of the inner chamber S, and a middle exhaust opening 56 is provided between the two sides 532 of one end of the middle deflector 53 and the left and right inner lining plates 105 and 104 of the inner chamber S; along the depth direction of the fume hood 1, the projections of the lower air outlets 55 and the projections of the middle air outlets 56 are symmetrical along the adjacent lines (indicated by dotted lines L in fig. 17) of the lower-stage air deflector 52 and the middle-stage air deflector 53.

Illustratively, along the width direction of the fume hood 1, first gaps are respectively formed between two side edges 522 of the other end of the lower deflector 52 and the left inner lining plate 105 and the right inner lining plate 104 of the inner cavity S, and the first gaps gradually increase from bottom to top, that is, the shape of the lower exhaust opening 55 gradually increases from bottom to top. Along the width direction of the fume hood 1, second gaps are respectively arranged between two side edges 532 of one end of the middle flow guide plate 53 and the left inner lining plate 105 and the right inner lining plate 104 of the inner cavity S, and the second gaps are gradually reduced from bottom to top, namely, the shape of the middle air outlet 56 is gradually reduced from bottom to top.

In some possible embodiments, at least 70% of the air supply amount from the side air supply module enters the air discharge passage P2 from the air discharge gap between the lower-stage flow guide plate 52 and the middle-stage flow guide plate 53 and the left lining plate and the right lining plate of the inner cavity S, and the rest enters the air discharge passage P2 from the lower air discharge opening 55 and the middle air discharge opening 56.

After the arrangement: 1) The air quantity extracted from the window opening (front opening) is reduced by air supplement, so that the purpose of energy saving is achieved; 2) The arrangement of each air supplementing port prevents pollutants from overflowing from the window opening, and the air supplementing ports are arranged on the upper side, the lower side, the left side and the right side of the fume hood 1, so that the pollutants are prevented from coming out comprehensively; 3) Aiming at a plurality of air supply ports and window openings, the guide plate structure of the embodiment of the application is used for ensuring that each air supply port corresponds to an air exhaust opening on the guide plate; 4) Finally, the stability of the airflow organization is ensured, and the laminar flow state is achieved without turbulence, so that pollutants can be quickly discharged.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, and the specific embodiments thereof are not to be considered as limiting. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims (22)

1. An upper air supplement module, comprising:

the upper air supplement box body extends along the width direction and comprises an upper inner air supplement port and an upper outer air supplement port, the upper inner air supplement port is used for being arranged towards a working cavity of the fume hood, the upper outer air supplement port is used for being arranged towards the lower part of the working cavity of the fume hood, and the upper outer air supplement port does not supplement air from the outside of the window;

the upper air supplementing box body is provided with an upper air supplementing air cavity and an air inlet communicated with the upper air supplementing air cavity, the upper air supplementing air cavity is provided with a pore plate, and outside air enters the upper air supplementing air cavity from the air inlet and flows out of the upper air supplementing box body through the pore plate by the upper inner air supplementing opening and the upper outer air supplementing opening respectively.

2. The upper air supplement module of claim 1, wherein the orifice plate, the upper inner air supplement port, and the upper outer air supplement port extend in the width direction, respectively.

3. The upper air supplement module of claim 1 or 2, wherein the upper air supplement air cavity comprises a first upper air supplement air cavity and a second upper air supplement air cavity, the air inlet is communicated with the first upper air supplement air cavity, and the upper inner air supplement port and the upper outer air supplement port are respectively communicated with the second upper air supplement air cavity; the pore plate comprises a guide plate, and the guide plate is positioned between the first upper air supplementing air cavity and the second upper air supplementing air cavity; outside air enters the first upper air supply cavity from the air inlet, enters the second upper air supply cavity after passing through the guide plate, and flows out of the upper air supply box body from the upper inner air supply port and the upper outer air supply port respectively.

4. The upper air supplement module of claim 3, wherein the upper air supplement box body comprises a top plate, an arc-shaped plate, a connecting plate and a bottom plate, the arc-shaped plate is arranged facing the inner cavity, the connecting plate extends along the height direction and is arranged opposite to the inner cavity, the upper inner air supplement opening is arranged on the arc-shaped plate, and the upper outer air supplement opening is arranged on the bottom plate;

along the height direction, the air inlet is arranged on the top plate, and the second upper air supplementing air cavity is positioned below the first upper air supplementing air cavity;

the guide plate includes first slope section, first slope section tilt up with the connecting plate is connected, first slope section is equipped with a plurality of wind holes of straining.

5. The upper air supplement module of claim 4, wherein the first inclined section is offset from the air inlet in a height direction, and the first inclined section is opposite to the upper outer air supplement opening.

6. An upwind module according to any of claims 4 to 5, wherein the deflector comprises a straight section connected to the end of the first angled section not connected to the connection plate, the straight section and the first angled section being arranged at an obtuse angle.

7. The upwind module of claim 6, wherein an angle between an extension of the straight section and an extension of the first angled section is α,20 ° ≦ α ≦ 80 °.

8. The upwind module of claim 7, wherein a distance W from an intersection of an extension of the straight section and an extension of the first inclined section to the connection plate is 30mm ≦ W ≦ 150mm.

9. The upwind module of claim 6, wherein the baffle further comprises a second inclined section, the second inclined section is inclined upwards and connected with the arc-shaped plate, and two ends of the straight section are respectively connected with the first inclined section and the second inclined section.

10. The upwind module of claim 9, wherein the wind inlet is positioned above the second angled section in a height direction.

11. The upper air supplement module according to any one of claims 4 to 5 and 7 to 10, further comprising a third upper air supplement air cavity, wherein the third upper air supplement air cavity is communicated with the second upper air supplement air cavity, and the orifice plate further comprises an upper air supplement air filter plate, and the upper air supplement air filter plate is located between the second upper air supplement air cavity and the third upper air supplement air cavity.

12. The upper air supplement module as claimed in claim 11, wherein an extension channel is further protruded downward from the bottom plate, an inner cavity of the extension channel forms a third upper air supplement air cavity, the third upper air supplement air cavity is communicated with the second upper air supplement air cavity, and the end of the extension channel is provided with the upper outer air supplement port.

13. The upper air supplement module of claim 11, wherein the plurality of air filter holes of the air guide plate, the upper air supplement and air filter plate, and the upper outer air supplement port are in one-to-one correspondence in a height direction.

14. The upper air supplement module of claim 11, wherein an air output of the second upper air supplement chamber is greater than an air output of the third upper air supplement chamber.

15. The upper air supplement module of claim 1, wherein an open area of the upper inner air supplement port is 1.5 to 4 times greater than an open area of the upper outer air supplement port.

16. The upper air supplement module of claim 12, wherein the upper air supplement filter plate is connected to the connection plate at one end and to the base plate at the other end.

17. The upper air supplement and filter module as claimed in claim 16, wherein the upper air supplement and filter plate is overlapped with the bottom plate and perpendicular to the connection plate, the extension channel extends downward from the connection of the upper air supplement and filter plate and the connection plate, respectively, and a sidewall of the extension channel is coplanar with the connection plate.

18. The upwind module of claim 17, wherein the extension channel has an inverted trapezoidal shape extending in a height direction.

19. The upper air supplement module of claim 12, wherein the guide plate extends in the width direction to be connected with an end plate of the upper air supplement box body to enclose the first upper air supplement air chamber with the top plate, the arc plate, and the connecting plate, the upper air supplement air filter plate extends in the width direction to be connected with an end plate of the upper air supplement box body to enclose the second upper air supplement air chamber with the guide plate, the arc plate, the bottom plate, and the connecting plate, and the upper air supplement air filter plate extends in the width direction to be connected with an end plate of the upper air supplement box body to enclose the third upper air supplement air chamber with the extension channel.

20. A fumehood, comprising:

the cabinet body is provided with an inner cavity, the inner cavity forms a working cavity, and a front opening which is opened to an indoor environment is formed in the front side of the inner cavity;

the air supplementing system is used for supplementing air to the fume hood;

the upwind module of any one of claims 1 to 19, provided at a top side of the inner cavity, in communication with the upwind system.

21. A fumehood according to claim 20 further comprising:

the partition piece is arranged at the front opening, is positioned on the top side of the inner cavity, and is arranged at intervals with the bottom side of the inner cavity along the height direction of the cabinet body;

the window is arranged on the outer side of the partition piece, can move upwards or downwards along the height direction, is arranged at intervals with the partition piece along the depth direction of the cabinet body, and forms a partition passage, and the partition passage is communicated with the inner cavity;

the upper inner air supply port faces the working cavity, and the upper outer air supply port faces the partition passage.

22. The fumehood of claim 20 or 21 further comprising a lower deflector, a middle deflector and an upper deflector disposed in the height direction, said lower deflector, said middle deflector and said upper deflector being spaced from the rear interior lining of said interior cavity to form an exhaust air passage, said exhaust air passage being in communication with an exhaust system;

the lower section guide plate and the middle section guide plate are provided with a plurality of through holes;

the upper-section guide plate comprises an extension section, the extension section is positioned between the rear lining plate and the middle-section guide plate, and the projection of the extension section is overlapped with the projection of the middle-section guide plate along the depth direction of the fume hood;

along the depth direction, the extension section and the middle section guide plate are arranged at intervals to form a rotary channel, and the rotary channel extends along the height direction and is communicated with the exhaust channel.

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