WO2024026901A1

WO2024026901A1 - Partition member air-supplementing module and fume hood

Info

Publication number: WO2024026901A1
Application number: PCT/CN2022/110766
Authority: WO
Inventors: 卢丙利; 阮红正
Original assignee: 倚世节能科技（上海）有限公司
Priority date: 2022-08-03
Filing date: 2022-08-08
Publication date: 2024-02-08
Also published as: CN218133943U

Abstract

Disclosed in the present utility model is a partition member air-supplementing module, comprising a partition member air-supplementing box extending in a width direction. The partition member air-supplementing box is provided with a partition member air-supplementing air cavity, a partition member air-supplementing air inlet in communication with the partition member air-supplementing air cavity, and partition member lower edge air-supplementing ports, wherein the partition member air-supplementing air inlet is configured to be in communication with an air-supplementing system of a fume hood. The present utility model can prevent contaminants in the fume hood from leaking. Also provided in the present utility model is a fume hood.

Description

Partition air supply module and fume hood

Technical field

The utility model relates to the field of ventilation technology, in particular to a partition air supply module and a fume hood.

Background technique

Ventilation equipment can generally be described as equipment that removes waste gas, harmful gases, particulate matter and other gases in a work space to the outside of the work space (usually outdoors). This type of equipment has a wide range of applications in industry and life, such as Ventilation equipment is required to isolate toxic gases and particulate matter in a certain work space from the users in factories that produce toxic and harmful gases or particulate matter in industrial production, in biological and chemical laboratories of R&D institutions, in kitchens that produce fumes during cooking, etc. , prevent users from inhaling toxic and harmful gases and particulate matter, and discharge toxic and harmful gases and particulate matter outdoors.

Fume hoods are important equipment for controlling pollutants in laboratories. Its function is to control the pollutants emitted in the cabinet and allow them to be smoothly discharged to the outdoors without escaping into the room through the operating port of the fume hood, endangering the health and safety of experimenters.

However, existing fume hoods have the phenomenon of pollutant leakage.

Utility model content

The purpose of the utility model is to solve the technical problem of pollutant overflow from the fume hood. The utility model provides an air supply module of a partition member having an air supply port at the lower edge of the partition member; the air supply port at the lower edge of the partition member prevents pollutants from overflowing through the bypass and eliminates the accumulation of inert flow on the inside of the window.

In order to solve the above technical problems, an embodiment of the present invention discloses a partition air supply module, which includes: a partition air supply box extending in the width direction, and the partition air supply box has a partition air supply box. cavity, a supplementary air inlet of the partition that is connected to the supplementary air cavity of the partition, and an air supplement at the lower edge of the partition. The supplementary air inlet of the partition is used to communicate with the supplementary air system of the fume hood. The partition The lower edge air supply port is used to be arranged on the upper part of the front opening of the fume hood and located inside the window of the fume hood.

A partition air supply module is installed on the upper part of the front opening of the fume hood and inside the window of the fume hood, which can prevent pollutants from overflowing from the inner cavity through the bypass and eliminate the accumulation of inert flow on the inside of the window.

According to another specific embodiment of the present invention, the air supply opening at the lower edge of the partition is disposed toward the window and extends along the width direction, so that when the window is in an open state or a closed state, the air supply port is An air curtain can be formed between the partition air supply module and the window.

Using the above technical solution, the air supply opening at the lower edge of the partition is used to blow air to the window, clean and dilute the pollutants on the inside of the window, speed up the top bypass air inlet speed, prevent pollutants from overflowing through the bypass, and eliminate the accumulation of inert flow on the inside of the window.

According to another specific embodiment of the present invention, the air outlet angle of the partition air supply module is 0° to 75°, and a plurality of air supply openings at the lower edge of the partition member are provided within the air outlet angle range.

According to another specific embodiment of the present invention, the air supply opening at the lower edge of the partition includes a horizontal air outlet area and an obliquely downward air outlet area, and the gap between the horizontal air outlet area and the obliquely downward air outlet area is The included angle is the air outlet angle.

According to another specific embodiment of the present invention, the partition air supply box includes a top plate and an arc plate. The top plate is used to connect with the partition part of the fume hood. The arc plate faces the window. The partition is provided on one side, and the air supply opening at the lower edge of the partition is provided on the arc-shaped plate; along the depth direction, the arc-shaped plate is spaced apart from the window, and is arranged from top to bottom along the height direction. , forming a small gap at the top and a big gap at the bottom between the arc-shaped plate and the window.

According to another specific embodiment of the present invention, the partition air supply box further includes a first connecting plate and a second connecting plate spaced apart along the depth direction. Along the depth direction, the first connecting plate The board is further away from the viewing window than the second connecting plate; the high end of the arc-shaped plate and the top plate are connected through the first connecting plate, and the low end of the arc-shaped plate and the top plate are connected through the second connecting plate. connect.

According to another specific embodiment of the present invention, along the depth direction, the lower end of the arc-shaped plate protrudes from the partition member and the second connecting plate, and the second connecting plate is connected to the arc-shaped plate. The bottom ends of the plates are connected by angled sections.

According to another specific embodiment of the present invention, the partition air supplement box includes side plates spaced apart along the width direction, and the side plates are provided with the partition air supplement air inlets. The side plates It is used to be arranged facing the left upright column and the right upright column of the fume hood, and the air supplementary air inlet of the partition is used to communicate with the left column supplementary air cavity of the left column and the right column supplementary air cavity of the right column respectively.

This application also provides a fume hood, including:

The cabinet has an inner cavity, the inner cavity constitutes a working chamber, and a front opening open to the indoor environment is formed on the front side of the inner cavity;

An air supply system for supplying air to the fume hood;

A partition is provided at the front opening and located on the top side of the inner cavity. Along the height direction of the cabinet, the partition is spaced apart from the bottom side of the inner cavity;

A window is provided on the outside of the partition, and the window can move upward or downward along the height direction to be in an open state or a closed state; along the depth direction of the cabinet, the window and the Partition spacing settings;

The air supply module of the partition member according to any one of the above is provided on the partition member and communicates with the air supply system. The air supply port at the lower edge of the partition member is provided toward the side of the window facing the partition member. When the window is in the open state or the closed state, an air curtain can be formed between the partition air supply module and the window.

According to another specific embodiment of the present utility model, it also includes a left upright and a right upright, and along the width direction of the fume hood, the partition air supply module is located between the left upright and the right upright;

The left column includes a left column air supply air cavity extending along the height direction, and the left column air supply air cavity is connected with the air supply system;

The right column includes a right column air supply air cavity extending along the height direction, and the right column air supply air cavity is connected with the air supply system;

The side panels of the partition air supply module are arranged facing the left upright and the right upright, and the air supply inlets of the partition are respectively connected with the left upright air supply air cavity and the right upright column air supply air cavity. Connected.

According to another specific embodiment of the present invention, the inner cavity includes a left inner lining plate and a right inner lining plate, and the left inner lining plate is installed on the side of the left column facing the rear side of the inner cavity, so The right inner lining plate is installed on the side of the right upright column facing the rear side of the inner cavity;

The left upright column includes a first air inlet of the left upright column. The part of the left upright column facing the inner cavity is provided with a left upright column air outlet. The left upright column air supply air cavity passes through the first air inlet of the left upright column and the The air supply system is connected, and the air outlet of the left column is connected with the air supply cavity of the left column; and/or,

The right upright column includes a first air inlet of the right upright column. The part of the right upright column facing the inner cavity is provided with a right upright column air outlet. The right upright column air supply air cavity communicates with the first air inlet of the right upright column through the first air inlet of the right upright column. The air supply system is connected, and the air outlet of the right column is connected with the air supply cavity of the right column.

According to another specific embodiment of the present invention, the left upright also includes a left upright side air supply filter plate extending along the height direction, and the left upright side air supply filter plate supplies air to the left upright column. The air cavity is divided into a supplementary air cavity in front of the left column and a supplementary air cavity in the rear of the left column. The air outlet of the left column is connected with the supplementary air cavity in front of the left column. The first air inlet of the left column is connected with the left column. The supplementary air cavity behind the column is connected; and/or,

The right column also includes a right column side supplementary air filter plate extending along the height direction. The right column side supplementary air filter plate divides the right column supplementary air cavity into a right column front supplementary air cavity. and the air supply air cavity behind the right upright column. The air outlet of the right upright column is connected with the air supply air cavity in front of the right upright column. The first air inlet of the right upright column is connected with the air supply air cavity behind the right upright column.

According to another specific embodiment of the present invention, the air supply module of the partition is provided at the bottom end of the partition in the height direction.

According to another specific embodiment of the present invention, it also includes a lower guide plate, a middle guide plate and an upper guide plate arranged along the height direction. The lower guide plate, the middle guide plate and the upper guide plate are arranged in the height direction. The upper guide plate is spaced apart from the rear lining plate of the inner cavity to form an exhaust channel, and the exhaust channel is connected to the exhaust system;

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

The upper guide plate includes an extension section. The extension section is located between the rear lining plate and the middle guide plate. Along the depth direction of the fume hood, the projection of the extension section and the middle guide plate The projections of the flow plates overlap;

Along the depth direction, the extension section is spaced apart from the middle guide plate to form a rotary channel. The rotary channel extends along the height direction and is connected with the exhaust channel, and enters the working chamber through the front opening. The air that enters the working chamber through the air supply system can flow into the exhaust channel through the rotary channel and be discharged from the working chamber.

According to another specific embodiment of the present invention, the extension section and the middle section guide plate are arranged in parallel.

According to another specific embodiment of the present invention, along the height direction, the depth of the rotary channel is 20 mm to 1 m.

According to another specific implementation of the present invention, the air supply system includes:

An air supply channel is located on the top of the cabinet, and an air inlet is provided on the air supply channel;

The air inlet channel is connected with the air supply channel. The air inlet channel extends along the height direction and is located on the rear side of the cabinet. The working chamber is located on the inlet along the depth direction of the cabinet. Between the air channel and the lower air supply outlet;

The adjustment channel extends along the depth direction of the cabinet. Along the depth direction, the adjustment channel has an inlet and an outlet, and the inlet of the adjustment channel is connected with the outlet of the air inlet channel;

The lower air supply module includes an air outlet channel, the lower air supply port is provided on the air outlet channel, and the entrance of the air outlet channel is connected with the outlet of the adjustment channel.

Description of drawings

Figure 1 shows the first front view of the fume hood according to the embodiment of the present utility model;

Figure 2 shows a side view of the fume hood according to the embodiment of the present invention;

Figure 3 shows a cross-sectional view of the fume hood according to the embodiment of the present invention;

Figure 4 shows the second cross-sectional view of the fume hood according to the embodiment of the present invention;

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

Figure 5b shows the third side view of the fume hood according to the embodiment of the present invention;

Figure 5c shows a schematic diagram 1 of the positional relationship between the window and the partition air supply module in the fume hood according to the embodiment of the present invention;

Figure 5d shows the second schematic diagram of the positional relationship between the window and the partition air supply module in the fume hood according to the embodiment of the present invention;

Figure 6 shows the first perspective view of the air supply module in the fume hood according to the embodiment of the present invention;

Figure 7 shows a cross-sectional view of the upper air supply module in the fume hood according to the embodiment of the present invention;

Figure 8 shows a side view of the upper air supply module in the fume hood according to the embodiment of the present invention;

Figure 9 shows the second perspective view of the air supply module in the fume hood according to the embodiment of the present invention;

Figure 10 shows a perspective view of the air supply channel and the raising block in the fume hood according to the embodiment of the present invention;

Figure 11 shows the third perspective view of the air supply module in the fume hood according to the embodiment of the present invention;

Figure 12 shows a top view of the fume hood according to the embodiment of the present invention;

Figure 13 is an enlarged view of part A in Figure 12;

Figure 14 shows the fourth perspective view of the air supply module in the fume hood according to the embodiment of the present invention;

Figure 15 shows the second top view of the fume hood according to the embodiment of the present invention;

Figure 16 is an enlarged view of part B in Figure 15;

Figure 17 shows the fifth perspective view of the air supply module in the fume hood according to the embodiment of the present invention;

Figure 18 shows a perspective view of the air supply module of the partition member in the fume hood according to the embodiment of the present invention;

Figure 19 shows a side view of the partition air supply module in the fume hood according to the embodiment of the present invention;

Figure 20 shows a side view of the baffle in the fume hood according to the embodiment of the present invention;

Figure 21 shows a schematic diagram of the air flow organization in the fume hood according to the embodiment of the present invention.

Detailed ways

The implementation of the present invention is described below with specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present utility model will be introduced in conjunction with the preferred embodiments, this does not mean that the features of the utility model are limited to this embodiment. On the contrary, the purpose of introducing the utility model in conjunction with the embodiments is to cover other options or modifications that may be extended based on the claims of the utility model. In order to provide a thorough understanding of the present invention, the following description contains many specific details. The invention may also be implemented without these details. Furthermore, some specific details will be omitted from the description in order to avoid confusing or obscuring the focus of the present invention. It should be noted that, as long as there is no conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

It should be noted that in this specification, similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be referenced in subsequent drawings. for further definition and explanation.

In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or The orientation or positional relationship in which the utility model product is customarily placed during use is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or component referred to must have a specific orientation, be constructed in a specific orientation, and operation, therefore it cannot be construed as a limitation of the present invention.

The terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

In the description of this embodiment, it should also be noted that, unless otherwise clearly stated and limited, the terms "set", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a fixed connection. Detachable connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood in specific situations.

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

Referring to Figures 1 to 5, this application provides a fume hood 1, including a cabinet body 10. The cabinet 10 has a top lining panel 101, a bottom lining panel 102, a rear lining panel 103, a left lining panel 105 (see Figure 17), and a right lining panel 104. Among them, the top lining board 101 and the bottom lining board 102 are arranged oppositely along the height direction of the fume hood 1 (shown in the Z direction in Figures 1 to 5), and the left lining board 105 and the right lining board 104 are arranged along the height direction of the fume hood 1. The top lining plate 101 is located at the rear side of the fume hood 1 along the depth direction of the fume hood 1 (shown in the Z direction in Figs. 2 to 4). The above-mentioned top lining plate 101, bottom lining plate 102, rear lining plate 103, left lining plate 105, and right lining plate 104 form an inner cavity S of the cabinet 10, and the inner cavity S constitutes the ventilation hood 1. In the working chamber (shown as S in Figures 2, 3 and 5), the front side of the inner chamber S (the side opposite to the rear lining plate 103 in the depth direction) is formed with a front opening 1a open to the indoor environment. Exemplarily, the front opening 1a serves as an operation port.

For example, in this embodiment, a base cabinet 13 is provided below the cabinet 10 (that is, below the inner cavity S). The base cabinet 13 can be used to store reagents and materials required for experiments. Figure 1 shows that three base cabinets 13 are provided below the cabinet 10, but the number of base cabinets 13 is not limited thereto, and a corresponding number of base cabinets 13 can be provided according to actual usage requirements.

When the fume hood 1 is placed in an indoor environment, the user faces the front opening 1a of the cabinet 10 when working. A partition 13 and a viewing window 14 are provided at the front opening 1a of the cabinet 10 . Referring to Figures 2 to 5d, the partition 13 extends along the width direction of the cabinet 10 (see Figures 3 and 4), is located on the top side of the inner cavity S (under the top lining plate 101), and extends along the height direction of the cabinet 10. , the partition member 13 is spaced apart from the bottom side of the inner cavity S (for example, the bottom lining plate 102). As shown in Figure 5, the partition 13 is arranged at an angle. In some possible implementations, the partition 13 is arranged vertically along the height direction. Illustratively, the partition 13 is connected to the left lining panel 105 and the right lining panel 104 along the width direction. Illustratively, the partition member 13 is partition glass.

The above-mentioned viewing window 14 is provided on the outside of the partition 13. The viewing window 14 can move upward along the height direction of the cabinet 10 to open the front opening 1a, or the viewing window 14 can move downward along the height direction of the cabinet 10. That is, the window 14 can move upward or downward relative to the partition 13 along the height direction of the cabinet 10 to be in an open state (shown in Figures 5a and 5c) or a closed state (shown in Figures 5b and 5d). In this embodiment, along the depth direction of the cabinet 10, the viewing window 14 and the partition member 13 are spaced apart to form a partition channel P1 (bypass), and the partition channel P1 is connected to the inner cavity S. Among them, the partition channel P1 extends along the width direction of the fume hood 1 (shown in Figures 3 and 4).

In some possible implementations, referring to FIGS. 3 and 4 , the fume hood 1 of the present application further includes a door lintel 141 , which is located at the outer top of the window 14 of the cabinet 10 . That is, along the depth direction, the viewing window 14 is located between the partition 13 and the door lintel 141 .

Continuing to refer to Figures 2 to 5, the fume hood 1 of the present application also includes a supplementary air system 40 and an exhaust system 50. Among them, the air supply system 40 is used to supply air to the inner cavity S of the fume hood 1 (for example, to provide air to each air supply module, and the air supply air flow is shown as B). The exhaust system 50 is used to remove the air that enters the working chamber through the front opening 1a (shown as Q1 in Figure 5), the air that enters the working chamber through the supplementary air system 40 and the partition channel P1 described later (Q2, Q3, Figure 5a, Q4 and Q5) are discharged from the working chamber (the exhaust air flow is shown as P). Among them, Q4 comes from the side air supply module (such as a column) described later, which will be described in detail later.

In the embodiment of the present application, the fume hood 1 further includes an upper air supply module 20 and a lower air supply module 30 . The upper air supply module 20 is located on the top side of the inner cavity S (for example, below the top lining plate 101) and is connected with the air supply system 40. The upper air supply module 20 includes an upper inner air supply port 21 and an upper inner air supply port. 21 is arranged toward the working chamber and is located in the space between the rear lining plate 103 and the partition 13 . For example, the above-mentioned upper inner air supply opening 21 extends along the width direction of the fume hood 1 . For example, the above-mentioned upper inner air supply port 21 faces the entrance of the later-described rotary passage P3. That is, at least part of the air flow blown out by the upper inner air supply port 21 is directly blown to the entrance of the rotary channel P3. This arrangement is beneficial to reducing the eddy current, pushing the eddy current to the back, keeping it away from the user, and speeding up the sewage discharge efficiency at the top, reducing pollution. Reduce the residence time of pollutants and reduce the high-density accumulation of pollutants.

For example, in the width direction, the upper inner air supply port 21 can supply air obliquely downward, horizontally or vertically downward toward the inside of the working chamber (shown as Q2 and Q6 in Figures 5a and 5b). With this arrangement, a circulation channel is formed in the upper part of the inner cavity S, which reduces eddy currents and pushes the eddy currents to the back of the cabinet 10 to keep them away from the user. It also speeds up the efficiency of sewage discharge at the top, shortens the residence time of pollutants, and reduces the high-density accumulation of pollutants. .

In addition, the embodiment of the present application also includes a partition air supply module 60, which is provided on the partition and communicates with the air supply system. For example, the partition air supply module 60 is provided at the bottom end of the partition 13 in the height direction. That is, the partition member air supply module 60 is arranged toward the downward air supply module 30 along the height direction. That is, along the height direction, the partition air supply module 60 is spaced apart from the upper air supply module 20 . This application does not limit the specific position of the partition air supply module 60 on the partition 13. Any position that can provide airflow to the window 14 and form an air curtain between the window 14 and the partition air supply module 60 belongs to the scope of protection of this application. For example, the partition air supply module 60 is provided at a position above the bottom end of the partition 13 .

The air supply module 60 of the partition member includes an air supply port 61 at the lower edge of the partition member. The air supply port 61 at the lower edge of the partition member is set toward the side of the window facing the partition member. The window is in an open state (shown in Figures 5a and 5c) or a closed state (Figure 5a and 5c). 5b and 5d), an air curtain can be formed between the partition air supply module 60 and the window 14. As shown in Figure 5a, the air supply opening 61 at the lower edge of the partition is provided at the upper part of the front opening 1a of the fume hood and is located inside the window 14 of the fume hood.

For example, the partition air supply module 60 extends along the width direction, and the air supply opening 61 at the lower edge of the partition can clean and dilute pollutants inside the window, speed up the top bypass air inlet speed, and prevent pollutants from overflowing through the bypass. Eliminates the accumulation of inert flow on the inside of the viewport. Regardless of whether the window is open or closed, the air supply opening 61 on the lower edge of the partition always forms an air curtain with the bypass inside the window to prevent the pollution generated in the cabinet from overflowing and improve the safety of users using the fume hood.

At the same time, since the air supply port 61 at the lower edge of the partition is disposed toward the window, when the air supply port 61 at the lower edge of the partition blows air toward the window, that is, when the air supply port 61 at the lower edge of the partition provides air flow (air curtain or air curtain) to the partition channel P1, it will not affect the Face wind speed. While preventing pollutants from overflowing through the bypass, the pollutants emitted in the cabinet can be smoothly discharged to the outdoors without escaping into the room through the operating port of the fume hood 1, endangering the health and safety of experimenters.

In some possible implementations, the air outlet angle (shown as α in Figure 5d) of the above-mentioned partition air supply module 60 is 0° to 75°, and multiple partition lower edge air supply openings 61 are provided within the air outlet angle range. Within this air outlet angle range, the partition air supply module 60 provides airflow to the window, which can not only clean and dilute the pollutants inside the window, speed up the top bypass air inlet speed, prevent pollutants from overflowing through the bypass, and will not affect the surface. Wind speed.

In some possible implementations, the air supply opening 61 at the lower edge of the partition includes a horizontal air outlet area (shown by the dotted line A in Figure 5d) and an oblique downward air outlet area (shown by the dotted line B in Figure 5d). The horizontal air outlet area The angle between the air outlet area and the air outlet area obliquely downward is the air outlet angle mentioned above. That is, the air supply opening 61 at the lower edge of the partition can not only provide airflow to the window in the horizontal direction, but also provide airflow to the window obliquely downward. At the same time, it can also provide airflow to the window in the area between the horizontal air outlet area and the obliquely downward air outlet area. Provide airflow.

The above-mentioned lower air supply module 30 is located on the bottom side of the inner cavity S and communicates with the air supply system 40 . For example, along the height direction, the lower air supply module 30 is spaced apart from the above-mentioned partition channel P1. The lower air supply module 30 includes a lower air supply port 31 extending along the width direction, and the lower air supply port 31 is at least disposed toward the working chamber. For example, the lower air supply port 31 can supply air obliquely upward, horizontally, or vertically downward toward the inside of the working chamber (shown as Q3 in Figures 5a and 5b).

Referring to Figure 6, the air supply sources in the working chamber of this application include: the air supply port 61 on the lower edge of the partition, the upper inner air supply port 21, the lower air supply port 31, and the front opening 1a. For example, the supply air volume of the upper inner air supply port 21 accounts for 25%, the supply air volume of the air supply port 61 on the lower edge of the partition accounts for 15%, and the supply air volume of the lower air supply port 31 accounts for 50%.

Since the above-mentioned upper inner air supply opening 21, the lower edge air supply opening 61 of the partition member and the lower air supply opening 31 extend along the left and right width directions of the working chamber, air can be sent out evenly and the formation of turbulence can be prevented. To reduce the risk of operators inhaling harmful substances, the wind blown out from each air supply port forms an "air barrier", which can buffer the ambient air in the work chamber and outside the cabinet, effectively preventing the risk of overflow. At the same time, after the above-mentioned air supply ports are provided, not only can the air volume sent from the front opening 1a be reduced, thereby reducing air conditioning energy consumption, but also because the setting of the upper inner air supply port 21 can establish a stable push-pull air flow pattern in the working chamber, so The risk of air overflow in the working chamber is greatly reduced.

The structure of the upper air supply module 20 will be described in detail below.

In some possible implementations, referring to FIGS. 7 to 9 , the upper air supply module 20 includes: an upper air supply box extending along the width direction (shown in the X direction in FIG. 7 ). For example, referring to Figures 5a and 5b, the upper air supply box is provided between the partition 13 and the top lining plate 101 of the inner cavity S, and the partition 13 supports the upper air supply box. However, this application is not limited to this. The upper air supply box can be installed on the top inner lining plate 101 of the inner cavity S, and the installation method to realize air supply to the working chamber and partition channel P1 falls within the scope of protection of this application. For example, the upper air supply box is connected to the left lining board and the right lining board along the width direction.

The upper supplementary air box has an upper supplementary air cavity (for example, including a first upper supplementary air cavity S1 and a second upper supplementary air cavity S2 described later) and an upper supplementary air inlet 2011 connected with the upper supplementary air cavity. , the upper air supply air cavity is provided with an orifice plate 205, and the external air enters the upper air supply air cavity through the upper air supply air inlet 2011, and flows out of the upper air supply box through the upper inner air supply opening 21 after passing through the orifice plate. That is, the upper air supply module 20 of the present application is a box structure. The box has an upper air supply air cavity. After the external air enters the upper air supply air cavity through the upper air supply air inlet 2011, it passes through the flow stabilizing effect of the orifice plate. , so that the outside air enters the upper inner air supply port 21 and the air is discharged evenly.

In this application, Figures 7 and 8 show that the upper air supply box has one upper air supply air cavity and extends in the width direction. In some possible implementations, there may be multiple upper air supply air chambers of the upper air supply box, such as two, three, four, etc.

As shown in Figures 7 and 9, the above-mentioned upper air supply box and orifice plate respectively extend in the width direction of the fume hood 1.

Referring to Figures 7 and 8, in the embodiment of the present application, the upper air supply air cavity includes a first upper air supply air cavity S1 and a second upper air supply air cavity S2. That is, the orifice plate divides the upper supplementary air cavity into two air cavities. Among them, the upper supplementary air inlet 2011 is provided in the first upper supplementary air cavity S1 and is connected with the first upper supplementary air cavity S1; the upper inner supplementary air inlet 21 is provided in the second upper supplementary air cavity S2 and is connected with the first upper supplementary air cavity S1. The two upper air supply air chambers S2 are connected. Along the height direction (shown in the Z direction in Figure 8), the first upper supplementary air cavity S1 is located above and connected to the second upper supplementary air cavity S2.

Along the height direction, the orifice plate 205 is located between the first upper supplementary air cavity S1 and the second upper supplementary air cavity S2. The outside air from the supplementary air system 40 enters the first upper supplementary air cavity S1 through the upper supplementary air inlet 2011, flows obliquely downward along the guide plate 205, and passes through the filter holes 2051 on the orifice plate 205 into the second In the upper supplementary air cavity S2, in the first upper supplementary air cavity S1, the wind speed decreases and the dynamic pressure is converted into static pressure, which plays a voltage stabilizing role. Under the action of static pressure, the air volume passes through the air filter holes 2051 on the orifice plate 205 evenly, and the wind coming out of the air filter holes 2051 on the orifice plate 205 has reached a uniform wind speed in the width direction.

After the air volume reaches the second upper air supply air cavity S2, it flows upward obliquely, reaches the upper inner air supply port 21, flows out of the upper air supply box from the opening, and enters the working chamber. Equivalently, the outside air enters the upper air supply box through the upper air supply inlet 2011, first moves obliquely downward, and then moves obliquely upward, causing the wind speed to decrease, and the dynamic pressure is converted into static pressure, which plays a stabilizing role. 21 can evenly supply air to the working chamber.

In some possible implementations, one or more of the first upper supplementary air cavity S1 and the second upper supplementary air cavity S2 may be formed by multiple sub-cavities.

Continuing to refer to Figures 7 to 9, the upper air supply box of the present application includes a top plate 201, an inclined plate 202, and a connecting plate 204. The inclined plate 202 is arranged facing the inner cavity S and is connected to the top plate 201 and the connecting plate 204 respectively. The air supply port 21 is provided at one end of the inclined plate 202 close to the top plate 201; the connecting plate 204 extends along the height direction and is arranged away from the inner cavity S, and the upper inner air supply port 21 is provided at the inclined plate 202 and the bottom plate 203; along the height direction, the upper The supplementary air inlet 2011 is provided at one end of the top plate 201 close to the connecting plate 204. The second upper supplementary air cavity S2 is located below the first upper supplementary air cavity S1. The air filter hole 2051 is provided at one end of the orifice plate 205 close to the connecting plate 204. . That is, along the height direction, the upper air supply air inlet 2011 is not arranged directly opposite the air filter hole 2051, which can prevent the wind from blowing directly into the air filter hole 2051 on the orifice plate 205, so that the air is discharged evenly.

For example, as shown in Figures 7 to 9, the orifice plate 205 extends along the width direction to connect with the end plate 208 of the box to form the first upper air supply air chamber S1 with the top plate 201 and the connecting plate 204. The orifice plate 205 extends along the width direction to connect with the end plate 208 of the box to form a second upper supplementary air cavity S2 with the inclined plate 202 and the connecting plate 204 .

For example, the upper supplementary air inlet 2011 is provided at one end of the top plate 201 close to the inner cavity S. For example, as shown in FIG. 8 , the upper supplementary air inlet 2011 is provided on the left side of the upper supplementary air box. After this arrangement, after the external air enters the first upper supplementary air cavity S1 from the upper supplementary air inlet 2011, it will flow along the orifice plate 205 and flow to the air filter hole 2051 at the bottom of the orifice plate 205, so that the external air will flow in the first upper supplementary air cavity S1. The flow distance in the upper air supply air cavity S1 is extended, which is beneficial to the uniform air outlet from the air filter hole 2051.

In some possible implementations, one end of the above-mentioned orifice plate 205 is connected to the top plate 201 and the other end is connected to the connecting plate 204. The volume of the first upper supplementary air cavity S1 is larger than the volume of the second upper supplementary air cavity S2. Illustratively, the orifice plate 205 is not parallel to the inclined plate 202. For example, along the width direction, the projection of the second upper supplementary air cavity S2 includes a first area and a second area, the first area corresponds to the upper inner supplementary air outlet 21, and the second area corresponds to the air filter hole 2051; In the first area, there is a first interval between the inclined plate 202 and the orifice plate 205 (shown as C in Figure 8 ), and in the second area, there is a second interval between the inclined plate 202 and the orifice plate 205 (shown as D in Figure 8 shown), the first interval is smaller than the second interval. Equivalently, the air flowing out from the air filter hole 2051 first enters the large space, then enters the small space diagonally upward, and then flows out from the upper inner air supply port 21 corresponding to the small space. This arrangement is conducive to reducing the wind speed, converting dynamic pressure into static pressure, and stabilizing the pressure. The upper inner air supply port 21 can evenly supply air to the working chamber.

It should be noted that the structure of the upper air supplement box of the present application is not limited to the structure shown in Figure 8. The structure with the upper supplementary air inlet 2011, the upper supplementary air cavity and the upper inner supplementary air outlet 21 all belong to this application. scope of protection.

Referring to Figures 7 and 9, the upper supplementary air inlet 2011 in the embodiment of the present application is a long and narrow slot, and the upper supplementary air inlet 2011 includes one or more than one. Two upper supplementary air inlets 2011 are shown in Figure 9 . In some possible implementations, the number of upper supplementary air inlets 2011 may be more, as long as they can provide external air to the upward supplementary air cavity.

Referring to Figures 2 to 6 and 9, the air supply system 40 of the present application includes an air supply channel 41 located on the top of the cabinet 10. The top of the air supply channel 41 is provided with a supply air inlet 411. The air supply channel 41 is The bottom is provided with a supplementary air outlet 412 (see Figure 10). The top lining plate 101 of the inner cavity S is provided with a first air passage 1012. The top lining plate 101 is located between the supplementary air passage 41 and the upper supplementary air box. , the supplementary air outlet 412, the first air passage 1012 and the upper supplementary air inlet 2011 are connected. That is to say, the makeup air enters the makeup air channel 41 from the makeup air inlet 411, and flows through the makeup air outlet 412 at the bottom of the makeup air channel 41, the first air passage 1012 on the top lining plate 101, and the upper makeup air inlet. The air outlet 2011 enters the upper air supply air cavity of the upper air supply module 20 .

In some possible implementations, with reference to Figures 5 and 9, the fume hood 1 further includes a booster block 1011. Along the height direction, the booster block 1011 is located between the air supply channel 41 and the top lining plate 101. The air supply channel 41 is spaced apart from the top lining plate 101 and forms a wire passage (for cables to pass through); the booster block 1011 is provided with a second air passage 10111, a supplementary air outlet, a first air passage 1012, a second The wind passage 10111 is connected to the upper supplementary air inlet 2011. The supplementary air passes from the supplementary air outlet 412 at the bottom of the supplementary air channel 41, passes through the raising block 1011, the top lining plate 101, and enters the upper supplementary air module 20. The upper or lower surface of the above-mentioned boosting block 1011 is in contact with the air supply channel 41 and the top lining plate 101, and the sealing foam is attached to the contact surface.

Due to the installation of the raising block 1011, the air supply channel 41 will not be in large contact with the top lining plate 101 and will not press the cables used in the fume hood 1, making it easier to change the corresponding cables when maintaining the equipment.

Referring to Figures 9 and 10, the above-mentioned supplementary air outlet 412, first air passage 1012, second air passage 10111, and upper supplementary air inlet 2011 are respectively long and narrow slots, and the supplementary air outlet 412, first air passage The channel 1012, the second air passage 10111 and the upper supplementary air inlet 2011 include one or more and correspond one to one. Figures 9 and 10 show that there are two supplementary air outlets 412, the first air passage 1012, the second air passage 10111 and the upper supplementary air inlet 2011. In the height direction, each supplementary air outlet 412 , the first air passage 1012, the second air passage 10111 and the upper supplementary air inlet 2011 correspond one to one, forming two independent supplementary air paths and will not interfere with each other.

Referring to Figures 2 to 6 and 9, the air supply system 40 of the present application also includes an air inlet channel 42, which is connected with the air supply channel 41. The air inlet channel 42 extends along the height direction and is located on the rear side of the cabinet 10. Along the cabinet In the depth direction of the cabinet 10, the working chamber is located between the air inlet channel 42 and the lower air supply port 31; the adjustment channel 43 extends along the depth direction of the cabinet 10. Along the depth direction, the adjustment channel 43 has an inlet and an outlet. The inlet is connected with the outlet of the air inlet channel 42; the upper air supply module 20 includes an air outlet channel, a lower air supply port 31 is provided on the air outlet channel, and the entrance of the air outlet channel is connected with the outlet of the adjustment channel 43.

For example, the outside air coming down from the air inlet channel 42 enters the adjustment channel 43, which is equivalent to entering a large space from a small space. After the outside air passes through the orifice plate in the adjustment channel 43, the impact of the jet on the uneven flow field is reduced. And convert part of the dynamic pressure into static pressure, reducing the speed of the outside air, and finally the air outlet wind speed is uniform, so that the lower air supply port 31 can evenly supply air to the working chamber of the fume hood 1, which plays the role of voltage stabilization and noise reduction. .

Exemplarily, the air inlet channel 42 includes a first air inlet channel 42 and a second air inlet channel 42 spaced apart along the width direction, and the two air inlet channels 42 respectively extend along the height.

Exemplarily, the supplementary air channel 41 includes a first part 412, a second part 413 and a third part 414 that are connected in sequence. The first part 412 is connected with one of the air inlet channels 42, and the supplementary air inlet 411 is provided in the second part 413. The third part 414 is connected with another air inlet channel 42 . For example, the first part 412 and the third part 414 of the supplementary air channel 41 extend along the depth direction respectively, and the second part 412 of the extension channel 207 extends along the width direction.

In fluid mechanics: fluids all have "viscous" characteristics. When the fluid flows in the pipeline, the flow speed is the fastest in the middle of the pipe, and the flow speed is the slowest on the inner wall of the pipe. The reason is that there is mutual friction between the fluid and the pipe wall, called viscous force, and the viscous force hinders the flow.

The left and right inner walls of the cabinet (i.e., the left lining plate 105 and the right lining plate 104) are at the position where the flow rate is the slowest and the capturing ability is the weakest. This is often where contaminants escape.

To this end, with reference to Figures 6 and 11, the fume hood 1 of the present application also includes: a side air supply module, including a side air outlet facing the rear side of the inner cavity S, and the side air supply module is connected with the air supply system 40. The side air supply module blows air to the rear side facing the inner cavity S (such as the orifice plate 205 described later) to speed up the flow, that is, to speed up the inner wall surface flow rate, eliminate inert flow or backflow, and enhance the inner wall pollutant capture capability. Therefore, this application adds an active air supply structure to the inner wall to reduce the risk of pollutant leakage.

That is to say, with reference to Figures 5 and 6, the air supply sources in the working chamber of this application include: the air supply port 61 (Q5) at the lower edge of the partition, the upper inner air supply port 21 (Q2), and the lower air supply port 31 (Q3) , front opening 1a (Q1) and side air outlet (Q4).

Exemplarily, the lower air supplement module 30 and/or the upper air supplement module 20 is connected with the side air supplement module to provide supplementary air flow to the wind cavity of the side air supplement module. That is, the lower air supplement module 30 described in the above embodiment provides supplementary air flow to the air cavity of the side air supplement module, or the upper air supplement module 20 described in the above embodiment provides the air flow to the air cavity of the side supplementary air module. The supplementary air flow may be provided to the wind cavity of the side supplementary air module through the lower supplementary air module 30 and the upper supplementary air module 20 described in the above embodiment at the same time.

The specific structure of the side air supply module is introduced in detail below.

Referring to Figures 1, 6 and 17, the fume hood 1 in the embodiment of the present application also includes a left upright 11 and a right upright 12. Along the width direction of the fume hood 1, the lower air supply module 30 is located between the left upright 11 and the right upright 12. between. Along the depth direction, the left upright column 11 is located on the front side of the left lining plate 105, and the right upright column 12 is located on the front side of the right lining plate 104. That is, the left lining plate 105 is installed on the side of the left upright 11 facing the rear side of the inner cavity S, and the right inner lining plate 104 is installed on the side of the right upright 12 facing the back side of the inner cavity S.

Referring to Figures 11 to 13, the right column 12 includes a first air inlet 1211 of the right column and a right column supplementary air cavity extending along the height direction. The part of the right column 12 facing the inner cavity S is provided with a right column air outlet. The air cavity is connected to the air supplement system 40 through the first air inlet 1211 of the right column, and the air outlet of the right column is connected to the supplementary air cavity of the right column.

The above-mentioned side air supply module includes a left column air supply air cavity, a left column air outlet, and a left column first air inlet.

For example, the structure of the left upright 11 and the right upright 12 are the same. The part of the left column 11 facing the inner cavity S is provided with a left column air outlet. The left column air supply air cavity is connected to the air supply system 40 through the first air inlet of the left column. The left column air outlet is connected to the left column air supply air cavity.

The above-mentioned side air supply module includes a right column air supply air cavity, a right column air outlet, and a right column first air inlet 1211.

That is, in the embodiment of the present application, the left upright column 11 and the right upright column 12 form side air supply modules respectively. In some possible implementations, the side air supplement modules may be formed through the left upright column 11 , or the side air supplement modules may be formed through the right upright columns 12 . In the embodiment of the present application, the left upright column 11 and the right upright column 12 simultaneously form a side air supply module as an example.

Referring to Figure 13, the right column 12 also includes a right column side supplementary air filter plate 1224 extending along the height direction. The right column side supplementary air filter plate 1224 divides the right column supplementary air cavity into a right column front supplementary air cavity 122. The right column rear air supply air cavity 121 is connected with the right column air outlet and the right column front air supply air cavity 122, and the right column first air inlet 1211 is connected with the right column rear air supply air cavity 121.

Correspondingly, the left column 11 also includes a left column side supplementary air filter plate extending along the height direction. The left column side supplementary air filter plate divides the left column supplementary air cavity into a left column front supplementary air cavity and a left column rear supplementary air cavity. In the air supply air cavity, the air outlet of the left column is connected with the air supply air cavity in front of the left column, and the first air inlet of the left column is connected with the air supply air cavity behind the left column.

As shown in Figures 11 and 13, along the width direction, the lower left air supplementary air outlet and the lower right supplementary air outlet 301 are provided on both sides of the lower air supplement module 30; the first air inlet of the left column is located downward on the left column 11. On one side of the air supplement module 30, the lower left supplementary air outlet is connected with the first air inlet of the left column; the first air inlet 1211 of the right column is provided on the side of the right column 12 facing downwards to the supplementary air module 30, and the lower right supplementary air outlet is 301 is connected with the first air inlet 1211 of the right column. That is, the lower supplementary air module 30 provides supplementary air flow to the left pillar rear supplementary air cavity and the right pillar rear supplementary air cavity 121 .

Since 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 part of the air volume from the air supplement system 40 to the left column 11 and the right column 12 to form side supplementary air. It is necessary to install other additional air supply systems 40, which saves parts and components, has a compact structure, and makes full use of the existing air supply system 40 for side air supply.

Moreover, FIG. 11 shows that the air supply channel 41 provides external air to the adjustment air cavity 431 of the adjustment channel 43 through the air supply inlet 411. The wind provided by the adjustment air cavity 431 to the downward air supply module 30 is uniform, so that, The supplementary air flow provided by the lower air supplement module 30 to the left column rear supplementary air cavity and the right column rear supplementary air cavity 121 is also uniform, and then the air outlet from the left column air outlet and the right column air outlet is also uniform. Accelerate the inner wall flow rate, eliminate inert flow or backflow, and enhance the inner wall pollutant capture ability. Therefore, the lower air supply module 30 is combined with the side air supply module formed by the left upright 11 and the right upright 12 to produce the effect of "1+1>2".

Continuing to refer to Figure 13, the right upright column 12 includes a first arm 1221, a second arm 1222 and a third arm 1223 spaced apart along the width direction (shown in the X direction in Figure 13). The first arm 1221 and the second arm 1223 of the right upright column 12 The arm 1222 holds the right column air outlet plate 1225. The right column air outlet plate 1225 is provided with a plurality of right column air outlets along the height direction. The first arm 1221, the second arm 1222, and the right column air outlet of the right column 12 The plate 1225 and the right column side supplementary air filter plate 1224 form the right column front supplementary air cavity 122; the second arm 1222 and the third arm 1223 of the right column 12 clamp the left inner lining plate 105.

The left column 11 includes a first arm, a second arm and a third arm. The first arm and the second arm of the left column 11 clamp the left column air outlet plate. The left column air outlet plate is provided with a plurality of left columns along the height direction. The column air outlet, the first arm and the second arm of the left column 11, the left column air outlet plate and the left column side supplementary air filter plate form the left column front supplementary air cavity; the second arm and the left column 11 The three arms clamp the left inner lining plate 105.

Such arrangement makes the structure of the fume hood 1 compact. While the left column 11 and the right column 12 are used to clamp the lower air supply module 30, the left lining plate 105 and the right lining plate 104, the air supply air in front of the left column is also formed. The air supply air cavity 122 in front of the cavity and the right column realizes inward air supply along the left lining plate 105 and the right lining plate 104.

After the wind enters the first air inlet 1211 of the right column from the lower right supplementary air outlet 301, it reaches the rear supplementary air cavity 121 of the right column. In the air supply air cavity 121 behind the right column, the wind speed decreases and the dynamic pressure is converted into static pressure, which plays a role in stabilizing pressure. Under the action of static pressure, the air volume passes through the supplementary air filter plate 1224 on the right column side uniformly, and the wind coming out from the supplementary air filter plate 1224 on the right column side has reached a uniform wind speed in the width direction. The supplementary air enters the supplementary air cavity 122 in front of the right column from the right column side air filter plate 1224, and then is discharged from the right column air outlet plate 1225. The right column air outlet plate 1225 prevents foreign matter from entering the air cavity and further equalizes the flow. The air volume discharged from the right column air outlet orifice plate 1225 plays a role in accelerating the flow velocity on the inner wall surface and eliminating inert flow or backflow.

Similarly, after the wind enters the first air inlet of the left column from the lower left supplementary air outlet, it reaches the rear supplementary air cavity of the left column. In the air supply air cavity behind the left column, the wind speed decreases and the dynamic pressure is converted into static pressure, which stabilizes the pressure. Under the action of static pressure, the air volume passes through the supplementary air filter plate on the left column side evenly, and the wind coming out of the supplementary air filter plate on the left column side has reached a uniform wind speed in the width direction. The supply air filter plate on the side of the left column enters the supply air cavity in front of the left column, and then is discharged from the air outlet plate of the left column. The air outlet plate of the left column prevents foreign matter from entering the air cavity and further equalizes the flow. The air volume discharged from the air outlet orifice plate of the left column plays a role in accelerating the flow velocity on the inner wall surface and eliminating inert flow or backflow.

In some possible implementations, the volume of the supplementary air cavity in front of the left column is smaller than the volume of the supplementary air cavity in the rear of the left column, and the volume of the supplementary air cavity 122 in front of the right column is smaller than the volume of the supplementary air cavity 121 in the rear of the right column. For example, the volume of the supplementary air cavity behind the left column is 1-8 times the volume of the supplementary air cavity in front of the left column; the volume of the supplementary air cavity 121 behind the right column is the volume of the supplementary air cavity 121 behind the right column. 1-8 times. After this arrangement, it can stabilize the flow and make the air outlet from the left column 11 and the right column 12 uniform.

11 and 13 show that the lower air supplement module 30 described in the above embodiment provides supplementary air flow to the air chambers of the left column 11 and the right column 12 .

In other embodiments, with reference to FIGS. 14 to 16 , the upper air supplement module 20 described in the above embodiment provides supplementary air flow to the air cavity of the side supplement air module. The left column 11 also includes a second air inlet of the left column, and the second air inlet of the left column is located above the first air inlet of the left column. The right column 12 also includes a second air inlet 1212 of the right column, and the second air inlet 1212 of the right column is located above the first air inlet 1211 of the right column.

Referring to Figure 14, along the width direction, the upper left supplementary air outlet 2012 and the upper right supplementary air outlet are provided on both sides of the upper air supplement module 20; side, the upper left supplementary air outlet 2012 is connected with the second air inlet of the left column; the second right column air inlet 1212 is provided on the side of the right column 12 facing upward the supplementary air module 20, and the upper right supplementary air outlet is connected with the second inlet of the right column. Air outlets 1212 are connected. That is, the upper supplementary air module 20 provides supplementary air flow to the left pillar rear supplementary air cavity and the right pillar rear supplementary air cavity 121 .

Since the upper air supplement module 20 supplements the air from the air supplement channel 41, the upper air supplement module 20 can provide part of the air volume from the air supplement channel 41 to the left column 11 and the right column 12 to form side supplementary air, without additional settings. The other air supply system 40 saves components and has a compact structure, and makes full use of the existing air supply system 40 for side air supply.

Moreover, FIG. 8 shows that the supplementary air channel 41 provides external air to the upper supplementary air module 20 through the supplementary air inlet 411. The provided air is uniform, so that the supplementary air flows from the upper supplementary air module 20 to the rear left column. The air supply airflow provided by the air supply cavity 121 behind the cavity and the right column is also uniform, and then the air outlet from the left column air outlet and the right column air outlet is also uniform. Accelerate the inner wall flow rate, eliminate inert flow or backflow, and enhance the inner wall pollutant capture ability. Therefore, the upper air supplement module 20 is combined with the side air supplement module formed by the left column 11 and the right column 12 to produce the effect of "1+1>2".

Referring to Figures 17 to 19, the partition air supply module 60 of the embodiment of the present application includes: a partition air supply box extending along the width direction (shown in the X direction in Figure 17 and Figure 18). The partition air supply box There is a partition member supplementary air cavity 60a and a partition member supplementary air inlet 605 connected with the partition member supplementary air cavity 60a. The partition member supplementary air inlet 605 is connected with the supplementary air system. For example, the supplementary air flow can be provided to the partition supplementary air module 60 through the above-mentioned left and right upright columns. Exemplarily, the partition air supplement module 60 is located between the left upright column and the right upright column (shown in conjunction with Figures 3 and 4). The partition air supplement box includes side plates spaced apart along the width direction, and the side plates are provided with partitions. The air supplementary air inlet 605 of the partition piece is provided, and the side panels of the partition air supplement box are respectively facing the left and right upright columns, and the partition air supplement air inlet 605 on the side plate is connected to the left column supplement air cavity and the right column supplement air cavity respectively. The wind cavity is connected.

Therefore, the supplementary air flow provided by the above-mentioned air supplement system to the left column supplementary air cavity and the right column supplementary air cavity through the lower air supplement module 30 and the upper air supplement module 20 can be further provided to the partition air supplement module 60 . There is no need to set up an additional air supply structure, and the existing air supply structure is fully utilized, which saves costs and makes the fume hood compact. An air supply system realizes: 1) accelerating the flow rate of the inner wall surface and eliminating the effect of inert flow or backflow; 2 ) The upper inner air supply port in the upper part of the inner cavity forms a circulation channel to reduce eddy currents, push the eddy currents to the back of the fume hood, keeping it away from the user, and speed up the discharge efficiency of the top of the fume hood, shorten the residence time of pollutants, and reduce pollutants The high-density gathering; 3) The outer air supply opening 61 on the lower edge of the partition blows air to the blocking channel window, supplements the air, cleans and dilutes the pollutants on the inside of the window, speeds up the top bypass air inlet speed, and prevents pollutants from overflowing through the bypass. , eliminating the accumulation of inert flow inside the window; producing the effect of “1+1>2”.

Continuing to refer to Figures 18 and 19, the above-mentioned partition air supply box includes a top plate 601 and an arc plate 603. For example, the top plate 601 is provided with a slot 6011, and the top plate 601 is connected to the above-mentioned partition 13 through the slot 6011. However, the connection method of the top plate 601 and the partition member 13 in this application is not limited to this, and can also be connected by other methods, such as welding or screw connection. As shown in FIG. 5a to FIG. 5d , the above-mentioned arc plate 603 is provided toward the side of the window 14 facing the partition 13 , and the air supply port 61 at the lower edge of the partition is provided on the arc plate 603 and extends along the width direction; along the depth direction (As shown in the Y direction in Figure 19), the arc-shaped plate 603 is spaced apart from the window 14, and from top to bottom along the height direction, a small gap is formed between the curved plate 603 and the window 14. That is, the distance between the top end of the arc-shaped plate 603 and the window 14 is a small distance, and the distance between the bottom end of the arc-shaped plate 603 and the window 14 is a large distance. This arrangement allows the air supply opening 61 at the lower edge of the partition to clean and dilute the pollutants inside the window 14, speed up the top bypass air inlet speed, and prevent pollutants from overflowing through the bypass. At the same time, it can also play a guiding role. Once some gas rebounds from the window, it can flow into the working chamber under the guidance of the arc plate 603. It is conducive to the bypass between the air supply opening 61 at the lower edge of the partition and the inside of the window 14 to form an air curtain to prevent the pollution generated in the cabinet from overflowing and improve the safety of users using the fume hood.

In some possible implementations, referring to Figure 19, the above-mentioned partition air supply box also includes a first connecting plate 604 and a second connecting plate 602 spaced apart along the depth direction. Along the depth direction, the first connecting plates 604 are opposite to each other. It is closer to the view window than the second connecting plate 602; the high end of the arc plate 603 is connected to the top plate 601 through the first connecting plate 604, and the low end of the arc plate 603 is connected to the top plate 601 through the second connecting plate 602.

As shown in FIGS. 5a to 5d , along the depth direction, the lower end of the arc plate 603 protrudes from the partition and the second connecting plate 602 and is located in the working chamber. The second connecting plate 602 and the bottom end of the arc plate 603 Connected by the inclined section 605, the inclined section 605 is arranged opposite to the upper air supply module 20 along the height direction. Equivalently, the arc plate 603 and the inclined section 605 at the bottom of the partition air supply box form a tip portion, which is located in the working chamber and is opposite to the upper air supply module along the height direction. After this arrangement, the pollutants at the fixed top can be prevented from sinking into the top of the working chamber. The air provided by the upper inner air supply port 21 of the upper air supply module 20 and the air supply port 61 on the lower edge of the partition of the partition air supply module 60 provide Under the action of the air and the air entering the working chamber through the front opening 1a, the residence time of pollutants is shortened, the high-density accumulation of pollutants is reduced, and the safety of users at the front opening is improved.

In some possible implementations, with reference to Figures 2 to 5 and 20, the fume hood 1 of the present application also includes a lower guide plate 52, a middle guide plate 53 and an upper guide plate 54 arranged along the height direction. The guide plate 52, the middle guide plate 53 and the upper guide plate 54 are spaced apart from the rear lining plate 103 of the inner cavity S to form an exhaust channel P2. The exhaust channel P2 is connected to the exhaust outlet of the exhaust system 50 51 connected. Figures 2 and 3 show that the exhaust passage P2 extends in the height direction as a whole.

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

For example, a plurality of lower through-holes 521 are provided in most areas of the panel of the lower guide plate 52. The plurality of lower through-holes 521 are distributed in the left and right width directions of the lower guide plate 52 and can remove heavier pollution. Material discharge from fume hood 1. For example, along the height direction, within 500mm of the upper part of the table, is the main location of the source of pollutants. The lower guide plate 52 adds a long slot feature (lower through hole 521) to increase the wind speed of the slot and speed up the discharge of pollutants.

A plurality of middle through holes 531 are provided in the lower area of the middle panel of the middle guide plate 53. The plurality of middle through holes 531 are distributed in the left and right width directions of the middle guide plate 53 and can discharge pollutants in the middle area out of the fume hood. 1. Along the width direction, the middle position is the main location of the pollution source. The middle guide plate 53 is slotted (the middle through hole 531) to increase the wind speed and accelerate the discharge. The edge and corner position reduces the air exhaust volume and has no openings.

For example, the upper guide plate 54 is not provided with through holes.

Adopting the above structure can reduce the average surface wind speed, thereby reducing the overall exhaust volume demand. Moreover, it is helpful to guide the gas in the working chamber to the above-mentioned exhaust area to avoid the generation of air vortex, and because the through holes on the baffle plate are distributed in the entire left and right width direction of the baffle plate, it is helpful to provide the entire The wide surface of the working chamber is basically consistent with continuous air exhaust.

Referring to Figures 2 to 5d, in the embodiment of the present application, the upper guide plate 54 includes an extension section 542. The extension section 542 is located between the rear lining plate 103 and the middle guide plate 53 along the depth direction of the fume hood 1. The projection of the extension section 542 overlaps with the projection of the middle guide plate 53; along the depth direction, the extension section 542 is spaced apart from the middle guide plate 53 to form a rotation channel P3. The rotation channel P3 extends along the height direction and is connected with the exhaust channel P2. Connected.

The traditional design of the air guide plate is usually to arrange the upper air guide plate 54 and the middle air guide plate 53 at intervals in the height direction to form an air exhaust gap, or to directly and fixedly connect them without forming an air exhaust gap. The airflow in the working chamber rises, forming a large vortex in the upper inner part.

Referring to Figure 5a, Figure 5b and Figure 20, in the embodiment of the present application, the design of the long and narrow channel (rotary channel P3) between the upper guide plate 54 and the middle guide plate 53 uses the rising airflow to be reversed (moved downward). ) after extraction, then discharge. The non-traditional design causes the airflow to rise, forming a large vortex. That is to say, the rising airflow enters the long and narrow channel (revolving channel P3). H in Figure 5a and 5b shows the direction of the airflow entering the revolving channel P3; after entering the long and narrow channel, the airflow first flows downward, enters the exhaust channel P2, and then Then it rises and enters the channel between the upper guide plate 54 and the rear lining plate 103, and then is discharged through the exhaust port 51 of the exhaust channel P2.

In some possible implementations, along the height direction, the depth of the turning channel P3 is 20 mm to 1 m. It can improve the airflow organization of the inner cavity S and make the airflow organization form a stable laminar flow fluid form, so that pollutants can be quickly discharged.

This application does not limit the specific shape of the rotary channel P3. Structures that can form a channel in which rising airflow is extracted in the reverse direction (downward movement) belong to the protection scope of this application.

In some possible implementations, the angle between the extension section 542 and the vertical line in the height direction is between -20° and 20°, and the angle between the middle guide plate 53 and the vertical line in the height direction is between -20° and 20°. °. That is, the range where the extension section 542 tilts 20° to the left or 20° to the right is the installation position of the extension section 542, and the range where the middle guide plate 53 tilts 20° to the left or 20° to the right is the middle guide. The setting position of plate 53.

Figure 5 shows that the extension section 542 and the middle section guide plate 53 are arranged in parallel. At this time, the angle between the extension section 542 and the vertical line in the height direction is 0°, and the angle between the middle guide plate 53 and the vertical line in the height direction is 0°.

Exemplarily, the width of the rotary channel P3 ranges from 10mm to 80mm. This arrangement can improve the airflow organization of the inner cavity S and make the airflow organization form a stable laminar flow fluid form, so that pollutants can be quickly discharged.

In some possible implementations, referring to Figures 4 and 5a, along the height direction, the rear lining plate 103 is provided with first connecting parts 15, second connecting parts 16, and third connecting parts 17 at intervals. For example, the first connecting member 15, the second connecting member 16, and the third connecting member 17 respectively extend in the depth direction.

Along the height direction, the lower guide plate 52 is arranged upright. One end of the lower guide plate 52 is connected to the first connector 15 and is spaced from the bottom side of the inner cavity S to form a first row connected to the exhaust channel P2. In the wind gap, the other end of the lower guide plate 52 is connected to the second connector 16; along the height direction, the middle guide plate 53 is set upright, and one end of the middle guide plate 53 is connected to the second connector 16 and is connected to the lower guide plate 53. A second exhaust gap connected to the exhaust channel P2 is formed between the flow plates 52. The other end of the lower flow guide plate 52 is connected to the third connector 17; along the height direction, the upper flow guide plate 54 also includes an inclined section 541. One end of the extension section 542 is connected to the third connecting member 17, and the other end of the extension section 542 is connected to one end of the inclined section 541. The other end of the inclined section 541 is inclined toward the front side of the inner cavity S and is connected to the top lining of the inner cavity S. Board 101 connection.

In some possible implementations, the other end of the inclined section 541 and the top lining plate 101 of the inner cavity S form a third exhaust gap connected to the exhaust channel P2. The airflow at the top can be discharged from this gap, and Q6 in Figure 5a shows the airflow entering this gap.

Continuing to refer to Figure 20, the above-mentioned lower guide plate 52 is provided with a lower exhaust area, and the lower exhaust area includes a plurality of lower through holes 521; the middle 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 reason for the leakage of the fume hood 1 is that there is no good air flow organization inside and outside the fume hood 1 .

To this end, referring to Figure 21, in another embodiment of the present application, the working chamber of the fume hood 1 is divided into three airflow organization areas from bottom to top along the height direction: A, B, and C. Among them, the airflow organization area A is formed below the dotted line M-M in Figure 21, the airflow organization area B is formed between the dotted line M-M and the dotted line L-L; the airflow organization area C is formed above the dotted line L-L in Figure 21.

In the airflow organization area A: at least 80% of the supplementary air volume from the lower supplementary air module 30 enters the exhaust passage P2 from the lower exhaust area and the first exhaust gap between the lower guide plate 52 and the bottom side of the inner cavity S. .

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

In the airflow organization area C: at least 80% of the supplementary air volume from the upper supplementary air module 20 enters the exhaust passage P2 from the rotary channel P3.

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

After this setting: 1) the supplementary air reduces the air volume extracted from the window opening (front opening) to achieve the purpose of energy saving; 2) the arrangement of each supplementary air outlet prevents pollutants from overflowing from the window opening, and the upper and lower sides of the fume hood 1 There are air supply openings on all sides to prevent dirt from escaping from the fume hood; 3) For multiple air supply openings and window openings, use the deflector structure of the above embodiment of the application to ensure that each air supply opening corresponds to the exhaust on the deflector plate opening; 4) ultimately ensure the stability of the air flow organization and achieve a laminar flow state without turbulence and turbulence, so that pollutants can be quickly discharged.

The above-mentioned airflow organization can be achieved by adjusting the exhaust ratio of each baffle in height, as well as the width and depth of the rotary channel P3, and through CFD simulation, thereby improving the airflow organization in the inner cavity S and forming a stable airflow organization. Laminar fluid morphology.

In some possible implementations, continuing to refer to FIG. 20 , there is a lower air outlet 55 between the two sides 522 of the other end of the lower guide plate 52 and the left inner lining plate 105 and the right inner lining plate 104 of the inner cavity S. , there is a middle air outlet 56 between the two sides 532 of one end of the middle guide plate 53 and the left inner lining plate 105 and the right inner lining plate 104 of the inner cavity S; along the depth direction of the fume hood 1, the lower air outlet The projection of 55 and the projection of the middle air outlet 56 are symmetrical along the adjacent line of the lower guide plate 52 and the middle guide plate 53 (shown by the dotted line L in Figure 20).

For example, along the width direction of the fume hood 1, there is a first gap respectively between the two sides 522 of the other end of the lower guide plate 52 and the left lining plate 105 and the right lining plate 104 of the inner cavity S. A gap gradually becomes larger from bottom to top, that is, the shape of the lower air outlet 55 gradually becomes larger from bottom to top. Along the width direction of the fume hood 1, there is a second gap between the two sides 532 of one end of the middle guide plate 53 and the left inner lining plate 105 and the right inner lining plate 104 of the inner cavity S. The second gap extends from bottom to top. It gradually becomes smaller from bottom to top, that is, the shape of the middle air outlet 56 gradually becomes smaller from bottom to top.

In some possible implementations, at least 70% of the supplementary air volume from the side supplementary air module comes from the exhaust gap between the lower section guide plate 52 and the middle section guide plate 53 and the left and right lining plates of the inner cavity S. Enter the exhaust channel P2, and the rest enter the exhaust channel P2 from the lower exhaust outlet 55 and the middle exhaust outlet 56.

After this setting: 1) the supplementary air reduces the air volume extracted from the window opening (front opening) to achieve the purpose of energy saving; 2) the arrangement of each supplementary air outlet prevents pollutants from overflowing from the window opening, and the upper and lower sides of the fume hood 1 There are air supply openings on both sides, left and right, to prevent dirt from coming out; 3) For multiple air supply openings and window openings, use the deflector structure of the above embodiment of the application to ensure that each air supply opening corresponds to the deflector The exhaust opening on the top; 4) ultimately ensures the stability of the air flow organization and reaches a laminar flow state without turbulence and turbulence, so that pollutants can be quickly discharged.

Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, those of ordinary skill in the art will understand that the above content is a further detailed description of the present invention in conjunction with specific embodiments. , it cannot be concluded that the specific implementation of the present utility model is limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

A partition air supply module is characterized in that it includes: a partition air supply box extending along the width direction, the partition air supply box having a partition air supply air chamber, and a partition air supply air chamber. The air supply inlet of the partition and the air supply at the lower edge of the partition are connected to the cavity. The air supply inlet of the partition is used to communicate with the air supply system of the fume hood, and the air supply at the lower edge of the partition is used to be installed in the fume hood. The upper part of the front opening and located inside the window of the fume hood.
The air supply module of the partition member according to claim 1, wherein the air supply port at the lower edge of the partition member is disposed toward the window and extends along the width direction, so that when the window is in an open state or When in the closed state, an air curtain can be formed between the partition air supply module and the window.
The partition air supplement module according to claim 1 or 2, characterized in that the air outlet angle of the partition air supplement module is 0° to 75°, and multiple partitions are provided within the air outlet angle range. The lower edge of the piece is filled with air vents.
The air supply module of the partition member according to claim 3, wherein the air supply port at the lower edge of the partition member includes a horizontal air outlet area and an obliquely downward air outlet area, and the horizontal air outlet area and the obliquely downward air outlet area The angle between the air outlet areas is the air outlet angle.
The partition air supplement module according to any one of claims 1 to 2 and 4, characterized in that the partition air supplement box includes a top plate and an arc plate, and the top plate is used to connect the partition to the fume hood. connection, the arc-shaped plate is arranged toward the side of the window facing the partition, and the air supply port at the lower edge of the partition is provided on the arc-shaped plate; along the depth direction, the arc-shaped plate and the window They are arranged at intervals, and from top to bottom along the height direction, a small space at the top and a large space at the bottom is formed between the arc plate and the window.
The partition air supplement module according to claim 5, wherein the partition air supplement box further includes a first connecting plate and a second connecting plate spaced apart along the depth direction. , the first connecting plate is closer to the window than the second connecting plate; the high end of the arc plate is connected to the top plate through the first connecting plate, and the low end of the arc plate is connected to the top plate. The top plates are connected via a second connecting plate.
The partition member air supply module according to claim 6, characterized in that, along the depth direction, the lower end of the arc-shaped plate protrudes from the partition member and the second connection plate, and the second connection plate The bottom end of the plate and the arc-shaped plate are connected through an inclined section.
The partition air supplement module according to any one of claims 1 to 2, 4, 6 to 7, wherein the partition air supplement box includes side plates spaced apart along the width direction, and the The side panel is provided with the air supplementary air inlet of the partition, and the side panel is used to be arranged facing the left and right upright columns of the fume hood, and the air supplementary air inlet of the partition is used to supplement air with the left column of the left column respectively. The air cavity is connected with the right column supplementary air cavity of the right column.
A fume hood, which is characterized by including:

The cabinet has an inner cavity, the inner cavity constitutes a working chamber, and a front opening open to the indoor environment is formed on the front side of the inner cavity;

An air supply system for supplying air to the fume hood;

A partition is provided at the front opening and located on the top side of the inner cavity. Along the height direction of the cabinet, the partition is spaced apart from the bottom side of the inner cavity;

A window is provided on the outside of the partition, and the window can move upward or downward along the height direction to be in an open state or a closed state; along the depth direction of the cabinet, the window and the Partition spacing settings;

The air supply module of the partition member according to any one of claims 1 to 8, located on the partition member and connected to the air supply system, with the air supply port at the lower edge of the partition member facing the window and facing the side of the partition member. Set on one side, when the window is in the open state or the closed state, an air curtain can be formed between the partition air supply module and the window.
The fume hood according to claim 9, further comprising a left upright and a right upright, and the partition air supply module is located between the left upright and the right upright along the width direction of the fume hood. ;

The left column includes a left column air supply air cavity extending along the height direction, and the left column air supply air cavity is connected with the air supply system;

The right column includes a right column air supply air cavity extending along the height direction, and the right column air supply air cavity is connected with the air supply system;

The side panels of the partition air supply module are arranged facing the left upright and the right upright, and the air supply inlets of the partition are respectively connected with the left upright air supply air cavity and the right upright column air supply air cavity. Connected.
The fume hood according to claim 10, wherein the inner cavity includes a left inner lining plate and a right inner lining plate, and the left inner lining plate is installed on a side of the left column facing the rear side of the inner cavity. On the side, the right inner lining plate is installed on the side of the right column facing the rear side of the inner cavity;

The left upright column includes a first air inlet of the left upright column. The part of the left upright column facing the inner cavity is provided with a left upright column air outlet. The left upright column air supply air cavity passes through the first air inlet of the left upright column and the The air supply system is connected, and the air outlet of the left column is connected with the air supply cavity of the left column; and/or,

The right upright column includes a first air inlet of the right upright column. The part of the right upright column facing the inner cavity is provided with a right upright column air outlet. The right upright column air supply air cavity communicates with the first air inlet of the right upright column through the first air inlet of the right upright column. The air supply system is connected, and the air outlet of the right column is connected with the air supply cavity of the right column.
The fume hood according to claim 11, wherein the left column further includes a left column side supplementary air filter plate extending along the height direction, and the left column side supplementary air filter plate connects the left column side to the left column side. The upright air supply air cavity is divided into the left upright front air supply air cavity and the left upright rear air supply air cavity. The left upright air outlet is connected to the left upright front air supply air cavity, and the left upright first air inlet is connected to the left upright air supply air cavity. The air supply air cavity behind the left upright column is connected; and/or,

The right column also includes a right column side supplementary air filter plate extending along the height direction. The right column side supplementary air filter plate divides the right column supplementary air cavity into a right column front supplementary air cavity. and the air supply air cavity behind the right upright column. The air outlet of the right upright column is connected with the air supply air cavity in front of the right upright column. The first air inlet of the right upright column is connected with the air supply air cavity behind the right upright column.
The partition air supply module according to any one of claims 9 to 12, characterized in that the partition air supply module is provided at the bottom end of the partition in the height direction.
The fume hood according to any one of claims 9 to 12, further comprising a lower guide plate, a middle guide plate and an upper guide plate arranged along the height direction, the lower guide plate, The middle guide plate and the upper guide plate are spaced apart from the rear lining plate of the inner cavity to form an exhaust channel, and the exhaust channel is connected with the exhaust system;

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

The upper guide plate includes an extension section. The extension section is located between the rear lining plate and the middle guide plate. Along the depth direction of the fume hood, the projection of the extension section and the middle guide plate The projections of the flow plates overlap;

Along the depth direction, the extension section is spaced apart from the middle guide plate to form a rotary channel. The rotary channel extends along the height direction and is connected with the exhaust channel, and enters the working chamber through the front opening. The air that enters the working chamber through the air supply system can flow into the exhaust channel through the rotary channel and be discharged from the working chamber.
The fume hood according to claim 14, wherein the extension section and the middle section guide plate are arranged in parallel.
The fume hood according to claims 14 to 14, characterized in that, along the height direction, the depth of the rotary channel is 20 mm to 1 m.
The fume hood according to any one of claims 9 to 12, wherein the air supply system includes:

An air supply channel is located on the top of the cabinet, and an air inlet is provided on the air supply channel;

The air inlet channel is connected with the air supply channel. The air inlet channel extends along the height direction and is located on the rear side of the cabinet. The working chamber is located on the inlet along the depth direction of the cabinet. Between the air channel and the lower air supply outlet;

The adjustment channel extends along the depth direction of the cabinet. Along the depth direction, the adjustment channel has an inlet and an outlet, and the inlet of the adjustment channel is connected with the outlet of the air inlet channel;

The lower air supply module includes an air outlet channel, the lower air supply port is provided on the air outlet channel, and the entrance of the air outlet channel is connected with the outlet of the adjustment channel.