CN-121972481-A - Desktop exhaust cabinet and air volume control method

CN121972481ACN 121972481 ACN121972481 ACN 121972481ACN-121972481-A

Abstract

The invention discloses a desktop exhaust cabinet and an air quantity control method, wherein the desktop exhaust cabinet comprises a cabinet body, four window upright posts, a first window assembly, a second window assembly and a displacement detection system, wherein the cabinet body is provided with a working cavity, the cabinet body comprises a top wall, four window upright posts are arranged on the top wall at intervals, the first window assembly comprises a first window, the first window is connected with two window upright posts so that the first window can be opened along a first direction relative to the window upright posts to form a first opening which is opened to an indoor environment, the second window assembly comprises a second window, the second window is connected with other two window upright posts so that the second window can be opened along the first direction relative to the window upright posts to form a second opening which is opened to the indoor environment, the second window is arranged opposite to the first window along a second direction, and/or the air supplementing system is provided with an air supplementing channel and an air supplementing air outlet, and the air supplementing air outlet is communicated with the air supplementing channel and is used for supplementing air into the working cavity. The desktop exhaust cabinet has the advantages of good pollution control performance, high safety and more energy conservation.

Inventors

RUAN HONGZHENG
LU BINGLI
LI BAOMING

Assignees

倚世节能科技（上海）有限公司

Dates

Publication Date: 20260505
Application Date: 20260331

Claims (14)

1. A desktop exhaust hood, comprising: The cabinet body has the working chamber, the cabinet body includes: A top wall; four window upright posts are arranged on the top wall at intervals; the first window assembly comprises a first window, and the first window is connected with two window upright posts so that the first window can be opened along a first direction relative to the window upright posts to form a first opening which is opened to the indoor environment; The second window assembly comprises a second window, the second window is connected with the other two window upright posts, so that the second window can be opened along the first direction relative to the window upright posts to form a second opening which is opened to the indoor environment, the second window and the first window are oppositely arranged along the second direction, the working cavity is positioned among the top wall, the window upright posts, the first window and the second window, and the first direction is intersected with the second direction; A displacement detection system, and/or, The air supplementing system is provided with an air supplementing channel and an air supplementing air outlet, the air supplementing air outlet is communicated with the air supplementing channel and is used for supplementing air into the working cavity, The displacement detection system comprises a first displacement detection device for detecting the height of the first opening, and/or, The displacement detection system comprises a second displacement detection device for detecting the height of the second opening.
2. A desktop exhaust hood according to claim 1, characterized in that said first displacement detection means is provided at said top wall; the first window assembly further includes: a first transmission assembly comprising: A first transmission unit; the first counterweight unit is connected with the first displacement detection device, and can be accommodated in the corresponding window upright post and move along the first direction relative to the window upright post; The first synchronization unit is sleeved on the first transmission unit and is respectively connected with the first window and the first counterweight unit.
3. A desktop exhaust hood according to claim 1 or 2, characterized in that the second displacement detection means is arranged at the top wall; the second window assembly further includes: a second transmission assembly comprising: A second transmission unit; the second counterweight unit is connected with the second displacement detection device, and can be accommodated in the corresponding window upright post and move along the first direction relative to the window upright post; The second synchronization unit is sleeved on the second transmission unit and is respectively connected with the second window and the second counterweight unit.
4. A desktop exhaust hood according to claim 1, characterized in that the air make-up system comprises: first air supplement subassembly includes: The first air supplementing stand columns are communicated with the air supplementing channel, are arranged on two sides of the working cavity along a third direction, are respectively connected with the two window stand columns, and are intersected with the first direction; the air supply outlet comprises: The first air supplementing air outlet is communicated with the first air supplementing upright post.
5. A desk top hood as claimed in claim 4, the desktop exhaust cabinet is characterized by further comprising: a bottom wall disposed opposite the top wall along the first direction; The first air make-up assembly further includes: The first air supplementing static pressure box is arranged on the lower side of the bottom wall along the first direction, the first air supplementing static pressure box is provided with a first air supplementing outlet and a first inlet, along the second direction, the first air supplementing outlet is positioned on one side, away from the working cavity, of the first air supplementing static pressure box, and faces the first opening, along the third direction, the first inlet is positioned on two opposite sides of the first air supplementing static pressure box, and is respectively communicated with the corresponding first air supplementing upright posts.
6. A desktop exhaust hood according to claim 4 or 5, characterized in that the first air supply column is provided with the first air supply outlet.
7. A desktop exhaust hood according to claim 4, characterized in that the air make-up system further comprises: The second air supplementing assembly is arranged opposite to the first air supplementing assembly along the second direction, and the structure of the second air supplementing assembly is the same as that of the first air supplementing assembly; The air supply outlet also comprises: The structure of the second air supplementing air outlet is the same as that of the first air supplementing air outlet.
8. A desktop exhaust hood according to claim 1, characterized in that the air make-up system further comprises: the air supplementing valve is arranged on the top wall; the air supplementing channel is arranged on the top wall and communicated with the air supplementing valve.
9. A desktop exhaust hood according to claim 8, characterized in that the air make-up system further comprises: The air supplementing and air inlet static pressure box is arranged on the top wall and is provided with an air supplementing inlet and an air supplementing outlet, the air supplementing valve is arranged on the air supplementing inlet, and the air supplementing outlet is communicated with the air supplementing channel.
10. A desk top hood as claimed in any one of claims 1,2, 4, 5, 7 to 9 wherein said air make-up duct is a hose or a wand.
11. A desktop exhaust hood according to any one of claims 1,2, 4, 5, 7 to 9, characterized in that said desktop exhaust hood further comprises: the exhaust system is provided with an exhaust outlet which is arranged on the top wall and communicated with the working cavity; and the exhaust valve is arranged on the top wall and communicated with the exhaust outlet, and is used for exhausting air.
12. A desktop exhaust hood according to any one of claims 1,2, 4, 5, 7 to 9, characterized in that said desktop exhaust hood further comprises: The human-computer interface screen is arranged on the cabinet body and is respectively and electrically connected with the air exhaust valve, the air supplementing valve and the displacement detection system and used for displaying and/or setting the air exhaust amount, the air supplementing amount, the air exhaust valve angle, the air supplementing valve angle, the face width value, the face air speed and/or the window opening height of the desktop air exhaust cabinet.
13. A desk top hood as claimed in any one of claims 1, 2,4, 5, 7 to 9 wherein said first displacement detection means and/or said second displacement detection means are displacement sensors.
14. A method for controlling air volume, which is applied to the desktop exhaust cabinet of any one of claims 1 to 13, wherein the desktop exhaust cabinet comprises an exhaust valve, and the method comprises: Acquiring a face width value and a theoretical face wind speed value of the desktop exhaust cabinet input by a user; determining a height value of the first opening and/or the second opening according to the displacement detection system; Determining a calculated exhaust value of the desktop exhaust cabinet, exhausting air by the exhaust valve according to the calculated exhaust value, and/or, The desktop exhaust cabinet comprises an air supplementing valve, and the air quantity control method comprises the following steps: acquiring the exhaust quantity of the exhaust valve and the air supplementing proportion of the desktop exhaust cabinet input by a user; And determining a calculated air supplementing value of the desktop exhaust cabinet according to the exhaust amount of the exhaust valve and the air supplementing proportion, wherein the air supplementing valve supplements air according to the calculated air supplementing value.

Description

Desktop exhaust cabinet and air volume control method Technical Field The invention relates to the technical field of purifying and exhausting, in particular to a desktop exhaust cabinet and an air quantity control method. Background The desktop exhaust cabinet is usually placed on a laboratory bench, and is mainly used for pollutant emission in operations with low exhaust requirements, such as placement of a rotary evaporator, medicament weighing, split charging and the like. A common desktop hood product is provided with lifting windows on two opposite sides thereof to provide an opening into the hood cavity for operation. At present, the existing desktop exhaust cabinet generally adopts a constant air volume exhaust mode, namely, an exhaust value is calculated only according to the working height of a window at one side, and constant air volume is maintained. The design has the following problems that when the window is closed, the air exhaust amount is still large, so that excessive fresh air which is extracted from a room and treated by an air conditioner is caused to waste energy, and when the windows on two sides are simultaneously opened, the surface air speed is too small, pollutants cannot be effectively removed, and potential safety hazards exist. Disclosure of Invention The invention aims to solve the problems of high energy consumption and potential safety hazard caused by adopting fixed air quantity for air exhaust of a desktop exhaust cabinet in the prior art. The invention provides a desktop exhaust cabinet and an air quantity control method, which have good pollution control performance, high safety and more energy conservation. In order to solve the technical problems, the embodiment of the invention discloses a desktop exhaust cabinet, which comprises a cabinet body, a cabinet body and a cabinet cover, wherein the cabinet body is provided with a working cavity, and the cabinet body comprises: A top wall; four window upright posts are arranged on the top wall at intervals; the first window assembly comprises a first window, and the first window is connected with two window upright posts so that the first window can be opened along a first direction relative to the window upright posts to form a first opening which is opened to the indoor environment; The second window assembly comprises a second window, the second window is connected with the other two window upright posts, so that the second window can be opened along the first direction relative to the window upright posts to form a second opening which is opened to the indoor environment, the second window and the first window are oppositely arranged along the second direction, the working cavity is positioned among the top wall, the window upright posts, the first window and the second window, and the first direction is intersected with the second direction; The air supply system comprises an air supply channel and an air supply outlet, wherein the air supply outlet is communicated with the air supply channel and is used for supplying air into the working cavity, the displacement detection system comprises a first displacement detection device and/or a second displacement detection device, the first displacement detection device is used for detecting the height of the first opening, and/or the displacement detection system comprises a second displacement detection device is used for detecting the height of the second opening. By adopting the technical scheme, the desktop exhaust cabinet provided by the embodiment of the application can calculate the exhaust value according to the height value of the first opening and the height value of the second opening, which are detected by the displacement detection system, and according to the theoretical surface wind speed preset by a user (for example, input through a human-computer interface screen), so as to obtain the constant actual surface wind speed. That is, the desktop exhaust cabinet of the embodiment of the application can dynamically adjust the exhaust air quantity through the displacement detection system so as to obtain stable surface air speed, and compared with the existing desktop exhaust cabinet with fixed air quantity for exhausting, the stable actual surface air speed can effectively remove pollutants, and the safety is higher. In addition, the desktop exhaust cabinet provided by the embodiment of the application can further improve the energy-saving effect by combining the displacement detection system with the air supplementing system, and the total energy saving reaches more than 70%. According to another specific embodiment of the invention, the embodiment of the invention discloses a desktop exhaust cabinet, and the first displacement detection device is arranged on the top wall; the first window assembly further includes: a first transmission assembly comprising: A first transmission unit; the first counterweight unit is connected with the first displacement detection d