A purification system for a large glove box and a glove box
Patent Information
- Application Number
- CN202522509107.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-11-26
Smart Images
Figure CN224865218U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of glove box technology, specifically to a purification system for a large glove box and a glove box. Background Technology
[0002] Glove box systems play an indispensable role in high-end manufacturing and research fields such as lithium batteries, OLEDs, semiconductors, and nuclear materials. Their core function is to provide a continuously stable, high-purity inert gas environment that is isolated from the outside world. Even trace amounts of oxygen, moisture, and suspended particulate matter in the environment can cause irreversible contamination and damage to sensitive materials or processes.
[0003] Especially for some specialized glove boxes (such as laboratory inert gas glove boxes, industrial explosion-proof glove boxes, medical / biosafety glove boxes, etc.), glove boxes suitable for high-precision scientific research experiments (such as lithium battery material preparation, semiconductor device packaging), glove boxes for handling hazardous chemicals (such as lithium metal processing, toxic gas experiments), and glove boxes for biological aseptic operations (such as cell culture, pathogen isolation), these glove boxes often have higher requirements for gas circulation purification and microenvironment maintenance.
[0004] However, existing glove boxes often suffer from unreasonable airflow organization design. The air supply method of existing glove boxes is often too simple, resulting in slow airflow or ineffective coverage in some areas inside the glove box, especially in corners, the back of equipment, or areas with dense materials, forming "purification dead zones". The gas in these dead zones cannot be extracted and purified in time, causing pollutants to accumulate continuously. This results in poor environmental uniformity throughout the glove box and difficulty in maintaining stable purity indicators. At the same time, existing glove boxes often only remove single pollutants, resulting in insufficient purification capacity, and thus cannot meet the continuous purification requirements of large glove boxes (volume > 5000L). Utility Model Content
[0005] To address the aforementioned shortcomings of existing technologies, this utility model provides a purification system and glove box for large glove boxes that ensures uniform airflow coverage inside the glove box and eliminates local dead corners.
[0006] To solve the above-mentioned technical problems, the present invention adopts the following solution: A purification system for a large glove box includes a circulating airflow module and a multi-stage composite purification module; The circulating air field module includes a centrifugal fan, an air inlet duct, an air outlet duct, and an exhaust duct arranged on the top of the glove box; The multi-stage composite purification module includes a pre-filtration unit and a main purification unit connected in sequence. The inlet of the air inlet duct is located at the bottom of the side wall of the glove box. The outlet of the air inlet duct is connected to the inlet of the multi-stage composite purification module. The outlet of the multi-stage composite purification module is connected to the inlet of the centrifugal fan. The outlet of the centrifugal fan is connected to the exhaust duct through the outlet duct to form a laminar flow circulating air field. The exhaust duct has multiple air outlets, and the ratio of its total air outlet area to the top area of the glove box is greater than a set value, so as to form a vertical laminar flow from top to bottom inside the glove box.
[0007] Preferably, the main purification unit includes a water and oxygen purification component and a deep purification component arranged in series; The water and oxygen purification component includes a double-layer molecular sieve absorption tower, which is filled with a molecular sieve layer and a copper catalyst layer from top to bottom, respectively for adsorbing water and oxygen. The deep purification component includes a copper-based alloy mesh, which is disposed below the copper catalyst layer to adsorb residual moisture and oxygen.
[0008] Preferably, there are two main purification units, and the two main purification units are arranged in parallel; The outlet of the air inlet duct is connected to two parallel branch pipes via a T-joint. Each branch pipe is connected in series with one of the multi-stage composite purification modules, and a control valve is provided at the inlet of each branch pipe. The outlets of the two main purification units merge and are then connected to the inlet of the centrifugal fan.
[0009] Preferably, the bottom of the exhaust duct has multiple slotted air outlets, and the ratio of the total air outlet area of the exhaust duct to the top area of the glove box is greater than 70%.
[0010] Preferably, the exhaust duct includes a main duct and multiple parallel branch ducts, each branch duct having a slotted air outlet at its bottom, and the width of the slotted air outlet at the bottom of the branch duct is 2-5mm. The ratio of the total air outlet area of all slotted air outlets to the top area of the glove box is greater than 70%.
[0011] Preferably, the purification system further includes a dynamic control module, which includes a PLC controller and an oxygen sensor, a moisture sensor, and a liquid sensor respectively connected to the PLC controller via signal connection; The oxygen sensor and moisture sensor are installed inside the air inlet duct or on the inner wall of the glove box to detect the oxygen concentration and moisture concentration in the circulating gas. The particulate counter is installed inside the glove box to detect the number of suspended particulates inside the glove box.
[0012] Preferably, the deep purification component further includes a molecular sieve regeneration and circulation module; The molecular sieve regeneration and circulation module is connected to the double-layer molecular sieve absorption tower via a pipe with a valve.
[0013] Preferably, the pre-filtration unit includes a filter for filtering particulate matter.
[0014] Preferably, the air volume of the centrifugal fan is 50-400 m³ / h. 3 / h, and the centrifugal fan is a variable frequency centrifugal fan.
[0015] A glove box comprising the aforementioned purification system for large glove boxes.
[0016] Compared with the prior art, the present invention has the following advantages: 1. This solution achieves a high degree of uniformity and thorough purification within the glove box environment: On one hand, laminar flow circulation is formed through the air inlet, outlet, and exhaust ducts, ensuring uniform airflow coverage of all areas within the glove box. On the other hand, a vertical laminar flow field is formed by the exhaust duct with a large-area outlet at the top and the inlet of the bottom inlet duct, allowing the purified gas to be pushed evenly and smoothly through the entire glove box like a piston. This effectively eliminates the airflow dead zones present in existing glove boxes, ensuring that any location within the glove box, including corners and areas with dense equipment, receives uniform purified gas replenishment. This ensures uniform airflow coverage of the glove box interior, eliminates local dead zones, and controls local pollutant concentration deviations to extremely low levels (e.g., below 5%), significantly improving environmental stability.
[0017] 2. The multi-stage composite purification module in this solution adopts a series structure of "pre-filtration + main purification + deep purification," achieving graded and synergistic removal of pollutants. This avoids the failure of a single module due to overload and significantly extends the service life of the core purification materials. In particular, the parallel arrangement of the main purification units allows the system to automatically or manually switch to another unit to continue working when one unit becomes saturated. This ensures uninterrupted and continuous operation of the purification process, guarantees production continuity, and facilitates online regeneration or replacement of saturated units.
[0018] 3. This solution can monitor environmental data such as moisture, oxygen and particulate matter concentration in the glove box in real time, and use a PLC controller to automatically adjust the speed of the centrifugal fan to change the circulating air volume, so as to achieve rapid response and precise control to pollution events. This structural design not only ensures purification efficiency, but also realizes on-demand energy allocation, achieving high-efficiency and energy-saving operation.
[0019] 4. This solution achieves synergistic removal of multi-component pollutants (oxygen <1ppm, moisture ≤1ppm) in large-capacity glove boxes, with an overall purification efficiency >99.9%, meeting the high-precision experimental requirements of semiconductors, lithium batteries, and other fields.
[0020] 5. The centrifugal fan used in this solution has a circulating air volume of 50-400m³. 3 / h (air exchange rate > 10 times / hour), supports glove boxes with a volume of 5000L~20000L, and ensures uniform circulation without dead corner contamination.
[0021] 6. This solution adopts a modular structure design, which can be adapted to glove boxes of different volumes (expandable to 5000L-20000L), with energy consumption <1.5kW·h / m3·d and maintenance cycle >6 months (lifespan of key modules >1 year).
[0022] 7. This solution ensures the safety of glove box operation through pressure monitoring, leakage alarm and emergency bypass design, and the modular structure facilitates rapid maintenance and upgrades. Attached Figure Description
[0023] Appendix Figure 1 This is a front view of the purification system for a large glove box according to this utility model; Appendix Figure 2 This is a perspective view of the purification system for a large glove box according to this utility model; Appendix Figure 3 A perspective view of a glove box incorporating the purification system for large glove boxes according to this utility model; Appendix Figure 4 This is a front view of a glove box equipped with the purification system for large glove boxes according to this utility model.
[0024] Explanation of reference numerals in the attached diagram: Centrifugal fan 1, Inlet duct 2, Outlet duct 3, Main purification unit 4, Oxygen sensor 5, Moisture sensor 6, T-joint 7, Molecular sieve layer 8, Copper catalyst layer 9, Copper-based alloy mesh 10, Exhaust duct 11, Particulate matter counter 12. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0027] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that it does not depend on such a specific order. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation on the embodiments. Moreover, the method and / or process should not be limited to the steps performed in the written order; those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.
[0028] This specific embodiment proposes a purification system for large glove boxes, as shown in the attached figure. Figure 1 To the attached Figure 4 As shown, the purification system is connected to the glove box and is used to purify the gas inside the glove box.
[0029] Specifically, the purification system includes a circulating airflow module, a multi-stage composite purification module, and a dynamic control module.
[0030] The following is a detailed introduction to each module: Specifically, the circulating airflow module includes a centrifugal fan 1, an inlet duct 2, an outlet duct 3, and an exhaust duct 11 located at the top of the glove box. The centrifugal fan 1 is a variable frequency centrifugal fan, and its airflow is 50-400 m³ / h. 3 / h. 50-400m 3 The large air volume design ensures that the system has the ability to provide sufficient circulation power for large glove boxes, which is the fundamental guarantee for achieving high air exchange rates (such as more than 10 times / hour) and eliminating purification dead zones.
[0031] For example, the inlet of the air inlet duct 2 is located at the bottom of the side wall of the glove box to introduce the gas in the glove box from the bottom into the air inlet duct 2. The outlet of the air inlet duct 2 is connected to the inlet of the multi-stage composite purification module so that the gas introduced into the air inlet duct 2 is further purified by the multi-stage composite purification module. The outlet of the multi-stage composite purification module is connected to the inlet of the centrifugal fan 1 to deliver the purified gas to the centrifugal fan 1. The outlet of the centrifugal fan 1 is connected to the exhaust duct 11 through the air outlet duct 3 to deliver the purified gas to the exhaust duct 11 through the centrifugal fan 1, thereby forming a laminar flow circulating air field.
[0032] Specifically, the exhaust duct 11 has multiple air outlets, and the ratio of its total air outlet area to the top area of the glove box is greater than a set value, so as to form a vertical laminar flow from top to bottom in the glove box.
[0033] For example, the bottom of the exhaust duct 11 is provided with multiple slotted air outlets, and the ratio of the total air outlet area of the exhaust duct 11 to the top area of the glove box is greater than 70%.
[0034] Furthermore, the exhaust duct 11 includes a main duct and multiple parallel branch ducts. Each branch duct has a slotted air outlet at its bottom, and the width of the slotted air outlet at the bottom of the branch duct is 2-5mm. The ratio of the total air outlet area of all slotted air outlets to the top area of the glove box is greater than 70%.
[0035] In this way, the slotted air outlets on the exhaust duct 11 can form a continuous and uniform airflow curtain along the length of the duct. Combined with the large-area air supply covering more than 70% of the top area of the glove box, this creates a comprehensive and uniformly velocity vertical downward flow field within the operating area of the glove box. This airflow pattern can smoothly propel the gas downward like a "piston," effectively eliminating the eddies and dead zones caused by traditional point-type air outlets. In addition, this structure ensures that the purified high-purity gas can cover the entire working area without discrimination, including corners and gaps between equipment. This allows contaminants from any location within the box to be effectively captured and carried into the bottom air inlet duct 2 for circulation and purification, thereby significantly improving the overall efficiency of the purification system and ensuring a high degree of consistency in the purity of the environment within the box.
[0036] Specifically, the multi-stage composite purification module includes a pre-filtration unit and a main purification unit 4 connected in sequence.
[0037] The pre-filtration unit includes a filter used to remove particulate matter. This pre-filtration unit forms the first physical barrier of the system, efficiently removing suspended particulate matter and large-diameter impurities from the airflow. This effectively prevents these pollutants from entering and clogging the subsequent sophisticated and expensive main purification unit 4 (such as the molecular sieve adsorption tower and copper catalyst layer 9), avoiding problems such as reduced adsorption area and increased flow resistance caused by physical blockage of core materials, thus significantly extending its service life and regeneration cycle. Furthermore, pre-filtration ensures that the main purification unit 4 always operates in a clean airflow environment, allowing it to continuously achieve optimal adsorption performance and ensuring the long-term stability of the entire system's purification efficiency. Simultaneously, since the cost of the pre-filtration unit is far lower than that of the main purification unit 4, this structural design transforms the system's routine maintenance focus into a cheaper and easier-to-replace filter, significantly reducing the system's long-term operation and maintenance costs. Secondly, this unit, together with the subsequent main purification and deep purification units, forms a complete "coarse filtration-fine removal" multi-stage purification chain. By undertaking the initial filtration task, it reduces the processing load on the back-end components, allowing them to focus more on removing trace amounts of gaseous contaminants (water, oxygen), thereby ensuring that the output gas achieves higher cleanliness standards in terms of particulate matter concentration and gaseous impurity purity.
[0038] Specifically, the main purification unit 4 includes a water and oxygen purification component and a deep purification component arranged in series.
[0039] The water and oxygen purification component includes a double-layer molecular sieve absorption tower, which is filled with a molecular sieve layer 8 and a copper catalyst layer 9 from top to bottom to adsorb moisture and oxygen respectively; the deep purification component includes a copper-based alloy mesh 10, which is located below the copper catalyst layer 9 to adsorb residual moisture and oxygen.
[0040] In this way, by setting a specific structure of "molecular sieve layer 8 - copper catalyst layer 9 - copper-based alloy mesh 10" in the main purification unit 4 in a series from top to bottom, the graded, efficient and deep adsorption of moisture and oxygen in the gas in the glove box is achieved.
[0041] Specifically, when gas passes through the main purification unit 4, it first passes through the upper molecular sieve layer 8, which preferentially and efficiently adsorbs most of the moisture, protecting the downstream moisture-sensitive copper catalyst. The gas then flows through the copper catalyst layer 9, which specifically chemically adsorbs oxygen. This sequential design allows the two core purification materials to perform their respective functions synergistically, significantly improving the overall water and oxygen removal efficiency and material lifespan. Furthermore, the copper-based alloy mesh 10, located downstream of the main water and oxygen purification components, forms the final line of defense. It can absorb residual moisture and oxygen in the gas at room temperature, pushing the gas purity to the ppm level or even higher, ensuring that the system's exhaust gas meets extremely high cleanliness standards and satisfies the stringent requirements of high-end processes for ultra-low impurity concentrations.
[0042] For example, there are two main purification units 4, which are connected in parallel; The outlet of the air inlet duct 2 is connected to two parallel branch pipes via a T-joint 7. Each branch pipe has a multi-stage composite purification module connected in series, and a control valve is provided at the inlet of each branch pipe. The outlets of the two main purification units 4 merge and are connected to the inlet of the centrifugal fan 1.
[0043] This parallel structure of two main purification units 4 allows for seamless switching of the entire purification system. When one main purification unit 4 becomes saturated and requires regeneration or maintenance, it can be isolated from the system by closing the control valve at the inlet of its branch pipe, while simultaneously starting or maintaining the operation of the other standby main purification unit 4. This ensures uninterrupted purification flow, maintaining a continuously clean environment within the glove box, significantly improving production efficiency, and is particularly suitable for continuous industrial production or long-cycle scientific research experiments where downtime is not an option. Furthermore, the two main purification units 4 form a redundant backup system. In the event of a failure or performance degradation in one main purification unit 4, the system can quickly switch to the standby unit 4, providing dual protection for sensitive materials or processes within the glove box and significantly enhancing the reliability and safety of the entire purification system.
[0044] Specifically, the deep purification component also includes a molecular sieve regeneration and circulation module; The molecular sieve regeneration and circulation module is connected to the double-layer molecular sieve absorption tower via a pipe with a valve.
[0045] In this way, the molecular sieve regeneration and circulation module is connected to the adsorption tower through a pipeline with valves, so that the saturated double-layer molecular sieve absorption tower can be isolated and regenerated by heating without going offline or interrupting the main circulation process (e.g., the double-layer molecular sieve absorption tower triggers heating desorption after accumulating 2000L of gas adsorption). This structural setting transforms the traditional "consumable" component into a reusable "functional" component, realizing a leap from intermittent operation to almost infinite continuous operation.
[0046] Specifically, the dynamic control module includes a PLC controller, and an oxygen sensor 5, a moisture sensor 6, and a particulate matter counter 12, which are respectively connected to the PLC controller via signals. The oxygen sensor 5 and the moisture sensor 6 are installed inside the air inlet duct 2 or on the inner wall of the glove box to detect the oxygen concentration and moisture concentration in the circulating gas. The particulate matter counter 12 is installed inside the glove box to detect the number of suspended particulate matter inside the glove box.
[0047] In this way, by precisely arranging oxygen sensor 5 and moisture sensor 6 at key monitoring points such as the air inlet duct 2 or the inner wall of the box, and combining them with the particulate matter counter 12 inside the glove box, this structure achieves comprehensive, real-time structural perception of the environment inside the glove box and the working status of core components. This not only monitors the environmental purity inside the glove box, but also, by observing the trend of pollutant concentration changes, can predict the adsorption saturation state of the main purification unit 4 in advance, providing a precise data basis for triggering the molecular sieve regeneration cycle module, transforming passive replacement into proactive maintenance. Simultaneously, the use of a PLC controller enables automation of the entire process.
[0048] Meanwhile, in practical use, the PLC controller can automatically decide when to start the molecular sieve regeneration cycle module based on the real-time data (sensing) from various sensors and particulate matter detectors, and control the valves and molecular sieve regeneration cycle module to execute the regeneration program. This achieves automated management of the entire system life cycle, significantly reduces manual intervention, ensures that the environmental purity is always stable at the optimal level, and greatly reduces the maintenance cost and consumable cost of long-term operation.
[0049] Furthermore, when the oxygen / water concentration inside the glove box rises sharply, the PLC controller can immediately instruct the variable frequency centrifugal fan 1 to increase its speed, thereby instantly increasing the circulating air volume. This allows for rapid dilution and removal of contaminants, restoring the environment inside the glove box to a high purity standard in the shortest possible time. In other words, the variable frequency centrifugal fan 1 can automatically adjust its speed based on data from various sensors or preset programs, controlled by the PLC controller according to environmental data within the glove box. This better meets the purification needs of the gas inside the glove box while reducing energy consumption.
[0050] In addition, this specific embodiment also provides a glove box, which includes the above-mentioned purification system for large glove boxes.
[0051] Compared with existing technologies, this solution achieves a high degree of uniformity and thorough purification within the glove box environment. Firstly, a laminar flow circulation is formed through the airflow guides of the inlet duct 2, outlet duct 3, and exhaust duct 11, ensuring uniform airflow coverage throughout the glove box. Secondly, a vertical laminar flow field is formed by the exhaust duct 11 with a large-area outlet at the top and the inlet of the inlet duct 2 at the bottom, allowing the purified gas to be pushed evenly and smoothly through the entire glove box like a piston. This effectively eliminates the airflow dead zones present in existing technologies, ensuring uniform purified gas replenishment at any location within the glove box, including corners and areas with dense equipment. This ensures uniform airflow coverage of the glove box interior, eliminating local dead zones and controlling local pollutant concentration deviations to extremely low levels (e.g., below 5%), significantly improving environmental stability. The multi-stage composite purification module of this solution adopts a series structure of "pre-filtration + main purification + deep purification," achieving graded and synergistic removal of pollutants. This avoids overload failure of a single module and significantly extends the service life of the core purification materials. In particular, the parallel configuration of the main purification unit 4 allows the system to automatically or manually switch to another unit to continue operation when one unit becomes saturated, achieving uninterrupted continuous operation of the purification process and ensuring production continuity. It also facilitates online regeneration or replacement of saturated units. This solution can monitor environmental data such as moisture, oxygen, and particulate matter concentrations within the glove box in real time, and uses a PLC controller to automatically adjust the speed of centrifugal fan 1 to change the circulating air volume, achieving rapid response and precise control in the event of contamination. This structural design not only ensures purification efficiency but also achieves on-demand energy allocation, resulting in highly efficient and energy-saving operation. This solution achieves synergistic removal of multi-component pollutants (oxygen <1ppm, moisture ≤1ppm) in large-volume glove boxes, with a comprehensive purification efficiency >99.9%, meeting the high-precision experimental requirements of semiconductors, lithium batteries, and other industries. The circulating air volume of centrifugal fan 1 used in this solution is 50-400m³ / h. 3 With an air exchange rate >10 times / hour, this system supports glove boxes with volumes ranging from 5000L to 20000L, ensuring uniform circulation and eliminating dead-angle contamination. The modular design allows for adaptation to glove boxes of varying volumes (expandable to 5000L-20000L), with energy consumption <1.5kW·h / m³·d and a maintenance cycle >6 months (critical module lifespan >1 year). Pressure monitoring, leakage alarms, and emergency bypass design ensure glove box operational safety, while the modular structure facilitates rapid maintenance and upgrades.
[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.
Claims
1. A purification system for a large glove box, characterized in that, Includes a circulating airflow module and a multi-stage composite purification module; The circulating air field module includes a centrifugal fan, an air inlet duct, an air outlet duct, and an exhaust duct arranged on the top of the glove box; The multi-stage composite purification module includes a pre-filtration unit and a main purification unit connected in sequence. The inlet of the air inlet duct is located at the bottom of the side wall of the glove box. The outlet of the air inlet duct is connected to the inlet of the multi-stage composite purification module. The outlet of the multi-stage composite purification module is connected to the inlet of the centrifugal fan. The outlet of the centrifugal fan is connected to the exhaust duct through the outlet duct to form a laminar flow circulating air field. The exhaust duct has multiple air outlets, and the ratio of its total air outlet area to the top area of the glove box is greater than a set value, so as to form a vertical laminar flow from top to bottom inside the glove box.
2. The purification system for large glove boxes according to claim 1, characterized in that, The main purification unit includes a water and oxygen purification component and a deep purification component arranged in series. The water and oxygen purification component includes a double-layer molecular sieve absorption tower, which is filled with a molecular sieve layer and a copper catalyst layer from top to bottom, respectively for adsorbing water and oxygen. The deep purification component includes a copper-based alloy mesh, which is disposed below the copper catalyst layer to adsorb residual moisture and oxygen.
3. The purification system for large glove boxes according to claim 2, characterized in that, There are two main purification units, which are connected in parallel. The outlet of the air inlet duct is connected to two parallel branch pipes via a T-joint. Each branch pipe is connected in series with one of the multi-stage composite purification modules, and a control valve is provided at the inlet of each branch pipe. The outlets of the two main purification units merge and are then connected to the inlet of the centrifugal fan.
4. The purification system for large glove boxes according to claim 1, characterized in that, The bottom of the exhaust duct has multiple slotted air outlets, and the ratio of the total air outlet area of the exhaust duct to the top area of the glove box is greater than 70%.
5. The purification system for large glove boxes according to claim 4, characterized in that, The exhaust duct includes a main duct and multiple parallel branch ducts. Each branch duct has a slotted air outlet at its bottom, and the width of the slotted air outlet at the bottom of the branch duct is 2-5mm. The ratio of the total air outlet area of all slotted air outlets to the top area of the glove box is greater than 70%.
6. The purification system for large glove boxes according to claim 1, characterized in that, The purification system also includes a dynamic control module, which includes a PLC controller and an oxygen sensor, a moisture sensor, and a particulate matter counter that are respectively connected to the PLC controller via signals. The oxygen sensor and moisture sensor are installed inside the air inlet duct or on the inner wall of the glove box to detect the oxygen concentration and moisture concentration in the circulating gas. The particulate counter is installed inside the glove box to detect the number of suspended particulates inside the glove box.
7. The purification system for large glove boxes according to claim 2, characterized in that, The deep purification component also includes a molecular sieve regeneration and circulation module; The molecular sieve regeneration and circulation module is connected to the double-layer molecular sieve absorption tower via a pipe with a valve.
8. The purification system for large glove boxes according to claim 1, characterized in that, The pre-filtration unit includes a filter for filtering particulate matter.
9. The purification system for large glove boxes according to claim 1, characterized in that, The centrifugal fan has an air volume of 50-400 m³ / h. 3 / h, and the centrifugal fan is a variable frequency centrifugal fan.
10. A glove box, characterized in that, The glove box includes a purification system for large glove boxes as described in any one of claims 1 to 9.