Constant-temperature and constant-humidity laboratory exhaust system
By designing a distributed exhaust network and activated carbon filter modules, the problems of uneven airflow distribution and difficult maintenance of purification devices in traditional laboratory exhaust systems are solved, achieving uniform exhaust and efficient purification, and improving the air exchange efficiency and filter life in the laboratory.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING RUIYING ENVIRONMENTAL TECH CO LTD
- Filing Date
- 2025-05-23
- Publication Date
- 2026-04-17
AI Technical Summary
Traditional laboratory exhaust systems suffer from uneven airflow distribution, low air exchange efficiency in localized areas, and difficulties in maintaining purification devices.
It adopts a distributed exhaust network design, combined with solenoid valves and activated carbon filter modules, to form uniform exhaust through air collection box, horizontal connecting pipe, diversion pipe and main manifold box. With replaceable activated carbon filter modules and filter screens, it achieves efficient purification and convenient maintenance.
It achieves uniform airflow distribution in the laboratory, eliminates local airflow dead zones, improves ventilation efficiency, extends the maintenance cycle of the filter, and enhances purification effect and maintenance convenience.
Smart Images
Figure CN224136028U_ABST
Abstract
Description
Technical Field
[0001] This utility model mainly relates to the field of laboratory ventilation technology, specifically to a constant temperature and humidity laboratory ventilation system. Background Technology
[0002] As scientific research experiments demand increasingly precise temperature and humidity control, the exhaust systems of constant temperature and humidity laboratories face greater technical challenges. Traditional laboratory exhaust systems often employ a single-point centralized exhaust design, connecting the exhaust vents of each experimental area through a single duct. In practical applications, this structure is prone to uneven airflow distribution due to the significant difference in distance between the initial and final exhaust vents and the main fan, leading to low air exchange efficiency in localized areas and affecting the stability of temperature and humidity control. Furthermore, traditional purification devices often use integrated filtration structures, which present challenges in replacing filter cartridges and incur high maintenance costs. Therefore, there is an urgent need to develop an exhaust system that can achieve uniform exhaust and is easy to maintain. Utility Model Content
[0003] 1. The technical problem to be solved by the utility model:
[0004] This invention provides a constant temperature and humidity laboratory exhaust system to solve the technical problems existing in the background art.
[0005] 2. Technical Solution:
[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows: a constant temperature and humidity laboratory exhaust system, comprising several evenly distributed air collection boxes, with multiple evenly distributed air inlet branch pipes connected to the bottom of each air collection box, adjacent air collection boxes being connected by horizontal connecting pipes, and the midpoint of each horizontal connecting pipe being connected to the bottom of the main manifold box through a branch pipe.
[0007] The top of the main manifold is connected to the first end of the first solenoid valve via a main pipe. The second end of the first solenoid valve is connected to the bottom of the power box via a secondary pipe. The power box is equipped with a fan, and its top is connected to the top of the purification box via an exhaust pipe. The purification box is equipped with a replaceable activated carbon filter module, and its bottom is connected to the final exhaust pipe.
[0008] Furthermore, the secondary pipe is equipped with a filter screen that matches its inner wall.
[0009] Furthermore, the second end is connected to a guide pipe via the side wall of the secondary pipe. The guide pipe is located between the first solenoid valve and the filter screen, and its other end is connected to the discharge pipe via a second solenoid valve.
[0010] Furthermore, a circular valve core that matches the inner wall of the horizontal connecting pipe is rotatably installed inside the horizontal connecting pipe, and one end of the rotating shaft of the circular valve core extends to the outside of the horizontal connecting pipe and is connected to a control motor.
[0011] Furthermore, a gas rectifier is fixed to the end of the exhaust pipe that connects to the top of the purification box.
[0012] Furthermore, the activated carbon filter module includes a mounting frame that matches the inner wall of the purification box. An activated carbon plate is installed inside the mounting frame, and symmetrical slide rail grooves are provided on both sides. The slide rail grooves are slidably connected to the guide rails fixed to the inner wall of the purification box and are perpendicular to the operating door installed on the purification box.
[0013] Furthermore, there are multiple activated carbon filter modules, which are evenly distributed along the vertical direction, with the filter radius of the activated carbon plates decreasing sequentially from top to bottom.
[0014] 3. Beneficial effects:
[0015] Compared with the prior art, the technical solution provided by this utility model has the following advantages: Each gas collection box, together with the horizontal connecting pipe, transports gas through the diversion pipe to form a distributed exhaust network. Therefore, the distance between each air inlet branch pipe and the fan is not much different, which avoids the phenomenon of uneven airflow distribution. This can effectively balance the difference in wind resistance, eliminate local airflow dead zones, and ensure that the air exchange efficiency of different areas in the laboratory is consistent.
[0016] The blower, in conjunction with the first and second solenoid valves, can blow down most of the particulate impurities inside the filter screen, thereby extending the filter screen maintenance cycle and allowing it to be used for a longer period of time.
[0017] The activated carbon plates, distributed from top to bottom, have progressively decreasing filtration radii. The upper layer can intercept large particles, while the lower layer adsorbs small molecule gases, achieving efficient and graded purification. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the connection structure between the first and second solenoid valves of this utility model.
[0020] Figure 3 This is a cross-sectional view of the horizontal connecting pipe of this utility model;
[0021] Figure 4 This is an exploded structural diagram of the activated carbon filter module and purification box of this utility model.
[0022] Figure label:
[0023] 1. Gas collection box; 2. Inlet branch pipe; 3. Horizontal connecting pipe; 4. Diversion pipe; 5. Main manifold box; 6. Main pipeline; 7. First solenoid valve; 8. Secondary pipeline; 9. Power box; 10. Fan; 11. Exhaust pipe; 12. Purification box; 121. Operating door; 13. Activated carbon filter module; 131. Mounting frame; 132. Activated carbon plate; 133. Slide rail groove; 14. Final exhaust pipe; 15. Filter screen; 16. Guide pipe; 17. Impurity discharge pipe; 18. Second solenoid valve; 19. Circular valve core; 20. Control motor; 21. Gas rectifier; 22. Guide slide. Detailed Implementation
[0024] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.
[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example
[0028] See attached document Figure 1-4 A constant temperature and humidity laboratory exhaust system includes several evenly distributed air collection boxes 1. The bottom of each air collection box 1 is connected to multiple evenly distributed air inlet branch pipes 2. Adjacent air collection boxes 1 are connected by horizontal connecting pipes 3. The midpoint of each horizontal connecting pipe 3 is connected to the bottom of the main manifold box 5 through a diversion pipe 4.
[0029] The top of the main manifold 5 is connected to the first end of the first solenoid valve 7 via the main pipe 6. The second end of the first solenoid valve 7 is connected to the bottom of the power box 9 via the auxiliary pipe 8. The power box 9 is equipped with a fan 10, and its top is connected to the top of the purification box 12 via an exhaust pipe 11. The purification box 12 is equipped with a replaceable activated carbon filter module 13, and its bottom is connected to the final exhaust pipe 14.
[0030] In this embodiment, when the first solenoid valve 7 is opened and the fan 10 is started to ventilate, each air inlet branch pipe 2 can ventilate all parts of the laboratory. Then the gas enters each gas collection box 1 and enters the main manifold box 5 through each branch pipe 4. Then it passes through the main pipe 6, the secondary pipe 8, and the power box 9 in sequence. Then it enters the purification box 12 through the exhaust pipe 11. Finally, it is filtered by the activated carbon filter module 13 and discharged to the outside through the final exhaust pipe 14.
[0031] The secondary pipe 8 is equipped with a filter screen 15 that matches its inner wall; the second end is connected to a guide pipe 16 through the side wall of the secondary pipe 8. The guide pipe 16 is located between the first solenoid valve 7 and the filter screen 15, and its other end is connected to the discharge pipe 17 through a second solenoid valve 18.
[0032] In this embodiment, the filter screen 15 can filter larger particulate impurities in the air, preventing them from affecting the filtration effect of the subsequent activated carbon filter module 13. When the first solenoid valve 7 is closed, the second solenoid valve 18 is opened, and the fan 10 is started to blow air, the fan 10 can blow down most of the particulate impurities in the filter screen 15, which will then enter the guide pipe 16 through the secondary pipe 8 and finally be discharged to the outside through the discharge pipe 17. This can extend the maintenance cycle of the filter screen 15 and allow it to be used for a longer period of time.
[0033] A circular valve core 19 that matches the inner wall of the horizontal connecting pipe 3 is rotatably installed inside the horizontal connecting pipe 3. One end of the rotating shaft of the circular valve core 19 extends to the outside of the horizontal connecting pipe 3 and is connected to a control motor 20.
[0034] In this embodiment, after the control motor 20 is started, it can drive the circular valve core 19 to rotate inside the horizontal connecting pipe 3, thereby adjusting the opening and closing of the horizontal connecting pipe 3 channel and thus adjusting the exhaust position and intensity according to the actual usage.
[0035] A gas rectifier 21 is fixed at the end of the exhaust pipe 11 that connects to the top of the purification box 12. This rectifier is used to convert irregularly flowing air into regularly flowing air, thereby achieving the purpose of reducing resistance and rectifying the flow.
[0036] The activated carbon filter module 13 includes an installation frame 131 that matches the inner wall of the purification box 12. An activated carbon plate 132 is installed inside the installation frame 131, and slide rail grooves 133 are symmetrically opened on both sides. The slide rail grooves 133 are slidably connected to the guide slide members 22 fixed to the inner wall of the purification box 12, and are perpendicular to the operation door 121 installed on the purification box 12.
[0037] In this embodiment, after opening the operating door 121, the slide rail grooves 133 on both sides of the mounting frame 131 are aligned with the guide slide 22 on the inner wall of the purification box 12 and inserted. Then, the operating door 121 is closed. The operating door 121 and the inner wall of the purification box 12 opposite to it can limit the mounting frame 131, thereby completing the installation of the activated carbon filter module 13. Similarly, it can be disassembled.
[0038] The activated carbon filter modules 13 are multiple and evenly distributed in the vertical direction, with the filtration radius of the activated carbon plates 132 decreasing sequentially from top to bottom.
[0039] In this embodiment, the spacing between adjacent activated carbon plates 132 allows the fluid to pass through each layer of activated carbon plates 132 more smoothly, reducing flow resistance. The spacing also slows the flow rate, increases the contact time between pollutants and activated carbon, and improves the adsorption effect. Furthermore, the filtration radius of the activated carbon plates 132 distributed from top to bottom decreases sequentially; the upper layer can intercept large particles, while the lower layer adsorbs small molecule gases, achieving highly efficient, staged purification.
[0040] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
[0041] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art.
Claims
1. A constant temperature and humidity laboratory exhaust system characterized by: It includes several evenly distributed air collection boxes (1), and the bottom of each air collection box (1) is connected to multiple evenly distributed air inlet branch pipes (2). Adjacent air collection boxes (1) are connected by horizontal connecting pipes (3), and the midpoint of each horizontal connecting pipe (3) is connected to the bottom of the main manifold box (5) through a branch pipe (4). The top of the main manifold (5) is connected to the first end of the first solenoid valve (7) via the main pipe (6). The second end of the first solenoid valve (7) is connected to the bottom of the power box (9) via the auxiliary pipe (8). The power box (9) is equipped with a fan (10) and the top is connected to the top of the purification box (12) via an exhaust pipe (11). The purification box (12) is equipped with a replaceable activated carbon filter module (13) and the bottom is connected to the final exhaust pipe (14).
2. The constant temperature and humidity laboratory exhaust system of claim 1, wherein: The secondary pipe (8) is equipped with a filter screen (15) that matches its inner wall.
3. The constant temperature and humidity laboratory exhaust system of claim 2, wherein: The second end is connected to a guide pipe (16) via the side wall of the secondary pipe (8). The guide pipe (16) is located between the first solenoid valve (7) and the filter screen (15), and the other end is connected to the discharge pipe (17) via the second solenoid valve (18).
4. The constant temperature and humidity laboratory exhaust system of claim 1, wherein: A circular valve core (19) matching its inner wall is rotatably installed inside the horizontal connecting pipe (3). One end of the rotating shaft of the circular valve core (19) extends to the outside of the horizontal connecting pipe (3) and is connected to a control motor (20).
5. The constant temperature and humidity laboratory exhaust system according to claim 1, characterized in that: A gas rectifier (21) is fixed at the end of the exhaust pipe (11) that connects to the top of the purification box (12).
6. The constant temperature and humidity laboratory exhaust system of claim 1, wherein: The activated carbon filter module (13) includes an installation frame (131) that matches the inner wall of the purification box (12). An activated carbon plate (132) is installed inside the installation frame (131), and slide rail grooves (133) are symmetrically opened on both sides. The slide rail grooves (133) are slidably connected to the guide slide (22) fixed on the inner wall of the purification box (12) and are perpendicular to the operation door (121) installed on the purification box (12).
7. The constant temperature and humidity laboratory exhaust system of claim 6, wherein: The activated carbon filter modules (13) are multiple and evenly distributed in the vertical direction, with the filtration radius of the activated carbon plates (132) decreasing sequentially from top to bottom.