Air purification structure of medical clean room

Abstract

The utility model discloses an air purification structure of a medical clean room in the technical field of fresh air systems, and aims to solve the problem that HEPA filter paper in the prior art needs to filter various impurities, so that the service life of the HEPA filter paper is not long. The air purifier comprises an air pipe and a driving device, a high-efficiency air filter is arranged on the air pipe, an inserting opening is formed in the air pipe, a mounting frame is arranged in the inserting opening in a sliding mode, the mounting frame is located at the air supply upstream position of the high-efficiency air filter, and no less than two filtering air chambers are arranged in the mounting frame; a washing filter screen fully distributed in the section space of the air chamber is mounted in each filtering air chamber, and the driving device is used for enabling the multiple filtering air chambers to be mutually switched in the air path communicating path of the air pipe; according to the fresh air system, the replacement and filtration burden of the HEPA filter paper is reduced by providing the front filter device, and meanwhile, the front filter device provides a simple replacement means, so that a more convenient switching means is provided for front filtration, the efficiency of the fresh air system is guaranteed, and the replacement cost of the HEPA filter paper is reduced.

Description

Technical Field

[0001] This utility model relates to an air purification structure for a medical cleanroom, belonging to the field of fresh air system technology. Background Technology

[0002] In the fresh air system of medical cleanrooms, HEPA filter paper (high-efficiency particulate air filter) is usually one of the core materials used to filter out tiny particulate matter in the air. The role of HEPA filter paper is very important, especially in high-cleanliness environments such as medical, pharmaceutical, and food processing. It can effectively remove dust, bacteria, viruses and other particles from the air, ensuring that the air in the cleanroom meets the prescribed cleanliness standards.

[0003] In the fresh air system of medical cleanrooms, HEPA filter paper can intercept particles with a diameter of 0.3 micrometers, and has a very strong filtration effect. However, in the use of fresh air systems, in addition to germs and impurities, the air also contains a large amount of substances such as hair, lint, and dust. Therefore, when using HEPA filter paper for filtration in a fresh air system, in addition to filtering bacteria and viruses, it also needs to filter other impurities in the air. This causes the HEPA filter paper to reach the end of its service life quickly and need to be replaced, which is costly. Furthermore, it gradually becomes clogged during operation, affecting the air supply effect of the fresh air system. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an air purification structure for medical cleanrooms. This structure reduces the burden of replacing HEPA filter paper by providing a pre-filter device, which also provides a simple replacement method. This makes it easier to switch or replace the pre-filter, thus helping to ensure the efficiency of the fresh air system and reduce the replacement cost of HEPA filter paper.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] The air purification structure for a medical cleanroom provided by this utility model includes an air duct and a driving device. A high-efficiency air filter is installed on the air duct, and an inlet is opened on the air duct. A mounting bracket is slidably arranged in the inlet. The mounting bracket is located upstream of the air supply of the high-efficiency air filter. The mounting bracket has at least two filter chambers inside. Each filter chamber is equipped with a water-washable filter screen that fills the cross-sectional space of the chamber. The driving device is used to drive the mounting bracket to slide so that the multiple filter chambers can switch with each other in the air path of the air duct, and to ensure that each filter chamber can form an independent communication state with the air path system in the air duct.

[0007] Each of the filter chambers has an air inlet end equipped with an intercepting net, and each of the filter chambers has an opening at the bottom. The air duct is located below the mounting frame and has a discharge port for receiving intercepted waste discharged from the bottom opening of the filter chamber.

[0008] The interception net includes a first row of rods and a second row of rods disposed at the air inlet end of the filter chamber. Both the first row of rods and the second row of rods are composed of multiple bent thin rods. The thin rods of the first row of rods bend from top to bottom toward the water-washing filter screen, and the thin rods of the second row of rods bend from bottom to top toward the water-washing filter screen. The bottom of the thin rods in the first row of rods is lower than the top of the thin rods in the second row of rods. The distance between the bottom of the thin rods in the first row of rods and the water-washing filter screen is greater than the distance between the top of the thin rods in the second row of rods and the water-washing filter screen.

[0009] Specifically, the mounting bracket has a rack at the top, the duct has an opening at the top, the rack has teeth below the duct opening, the drive device is a motor assembly mounted on the duct, the output shaft of the motor assembly has a drive disc, and the outer circumferential surface of the drive disc has teeth that contact the rack.

[0010] Specifically, it also includes a cleaning structure installed on the air duct, the cleaning structure including a positioning plate and a spray pipe installed on the positioning plate, the nozzle of the spray pipe pointing towards the position of the water washing filter.

[0011] Specifically, the cleaning structure has two sets, which are installed on both sides of the air duct respectively.

[0012] Specifically, it also includes a jet pipe and a liquid injection pipe, wherein the jet pipe is connected to the jet pipe and the liquid injection pipe respectively through a three-way solenoid valve.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0014] This invention provides a two-stage filtration system by installing a high-efficiency filter and a regular filter on the duct of the fresh air system. This effectively reduces the workload of the high-efficiency air filter and provides a simple means of replacement or switching for the regular filter. It also facilitates the switching of the water-washable filter in the working path, thereby avoiding the blockage of impurities and waste that could affect the energy efficiency of the fresh air system.

[0015] This invention features a cleaning device that can clean the water-washed filter screen of a switched-out ordinary filter. This effectively removes impurities adhering to the water-washed filter screen, allowing it to be reused after drying. In other words, under normal circumstances, the water-washed filter screen does not need to be replaced; it only requires simple cleaning and drying before it can be used again. This helps reduce the switching cost of the water-washed filter screen and the cumbersome replacement process, simplifying the system operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the air purification structure provided in this embodiment of the utility model;

[0017] Figure 2 This is a utility model Figure 1 Enlarged view of section A of the air purification structure provided in the embodiment;

[0018] Figure 3 This is a side view of the air purification structure provided in this embodiment of the utility model;

[0019] Figure 4 This is a utility model Figure 3 A cross-sectional view of the air purification structure in the BB direction provided in the embodiment;

[0020] Figure 5 This is a front view of the air purification structure provided in this embodiment of the utility model;

[0021] Figure 6 This is a utility model Figure 5 A cross-sectional view of the air purification structure provided in the embodiment;

[0022] Reference numerals: 1. Air duct; 2. High-efficiency air filter; 3. Mounting bracket; 4. Washable filter screen; 5. Drive unit; 6. Rack; 7. Drive disc; 8. Interception net; 801. First row of rods; 802. Second row of rods; 9. Discharge port; 10. Positioning plate; 11. Nozzle; 12. Three-way solenoid valve; 13. Air jet pipe; 14. Liquid spray pipe. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 based on the specific circumstances.

[0026] This utility model provides an air purification structure for a medical cleanroom, which reduces the burden of replacing HEPA filters by providing a pre-filter. The pre-filter also offers a simple replacement method, making it easier to switch or replace, thus helping to ensure the efficiency of the fresh air system and reduce the replacement cost of HEPA filters. To achieve the structure's function, the device includes an air duct 1 and a drive device 5, such as... Figure 1 and Figure 4 As shown, a high-efficiency air filter 2 is installed on the air duct 1 to adsorb particulate impurities such as bacteria in a medical environment. To reduce the burden on the high-efficiency air filter 2, extend its service life, and prolong replacement time, an inlet is provided on the air duct 1. This inlet can be installed horizontally through the air duct 1, and as shown... Figure 1As shown, a mounting bracket 3 is slidably installed within the socket, positioned upstream of the high-efficiency air filter 2. The mounting bracket 3 contains at least two filter chambers, each equipped with a washable filter screen 4 filling the cross-sectional space of the chamber. This structural design allows the washable filter screen 4 to effectively intercept dust particles, lint, hair, and other impurities in the air during air supply operations. It primarily filters large particulate impurities, preventing blockage at the location of the high-efficiency air filter 2. To ensure the air supply efficiency of the fresh air system, long-term blockage by impurities should be avoided. To ensure the normal air supply efficiency of the air duct, a drive device 5 is installed to drive the mounting bracket 3 to slide so that multiple filter chambers can switch between each other within the air duct 1. During the switching process, each filter chamber can form an independent connection with the air duct system within the air duct 1. With this design, if a filter chamber becomes filled with a lot of impurities, it can be directly removed by the drive device 5 and replaced with a chamber without accumulated impurities to form an independent connection with the air duct system, thereby avoiding impurities clogging the air duct. By combining the coarse filtration of the water-washable filter 4 and the fine filtration of the high-efficiency air filter, the air supply efficiency of the fresh air system is improved.

[0027] This utility model provides an air purification structure for a medical cleanroom. To prevent impurities from remaining upstream of the air supply end of the duct 1 after the filter chamber is removed, each filter chamber is equipped with an intercepting net 8 at its air inlet. The intercepting net 8 can be configured with a large inlet and a small inner opening to guide impurities into the filter chamber and prevent impurities from overflowing to a certain extent (this structure can be referenced to the entrance design of an eel trap). To facilitate the removal of impurities collected in the filter chamber, an opening is provided at the bottom of each filter chamber, and a discharge port 9 is provided below the mounting bracket 3 on the duct 1. The discharge port 9 is used to receive the intercepted waste discharged from the bottom opening of the filter chamber. Without special structural design, this waste falls freely into the inlet of the discharge port 9 under gravity, thereby realizing the discharge of intercepted waste in the filter chamber.

[0028] This utility model provides an air purification structure for a medical cleanroom, specifically offering a structural configuration and installation method for an interceptor mesh 8. Specifically, the interceptor mesh 8 includes a first row of rods 801 and a second row of rods 802 disposed at the air inlet end of the filter chamber. Figure 1 and Figure 4As shown, both the first row of rods 801 and the second row of rods 802 are composed of multiple bent thin rods. The thin rods of the first row of rods 801 bend downwards towards the water-washing filter screen 4, while the thin rods of the second row of rods 802 bend upwards towards the water-washing filter screen 4. The bottom of the thin rods of the first row of rods 801 is lower than the top of the thin rods of the second row of rods 802, and the distance between the bottom of the thin rods of the first row of rods 801 and the water-washing filter screen 4 is greater than the distance between the top of the thin rods of the second row of rods 802 and the water-washing filter screen 4. With this structural design, impurities in the air path can more easily enter the interior of the filter chamber. After the impurities enter the filter chamber, they are intercepted by the second row of rods 802, preventing some larger impurities from flowing out. With the above structural design, when filtering larger particles such as lint or hair in the duct, these impurities can be guided vertically by the thin rods of the two rod groups and fall into the space between the water-washing filter screen and the intercepting screen 8. Furthermore, the distance between the bottom of the thin rod of the first rod group 801 and the water-washing filter screen 4 is greater than the distance between the top of the thin rod of the second rod group 802 and the water-washing filter screen 4. This ensures that after intercepting lint and other debris, the thin rod of the first rod group 801 will slide down onto the thin rod of the second rod group 802 and then slide into the discharge port 9. This ensures that the lint and other debris intercepted by the first rod group 801 and the second rod group 802 will not enter the space between the intercepting screen 8 and the water-washing filter screen 4. Because there are gaps between the rod arrays, the airflow in the duct will not create turbulence. Small impurities will adhere relatively stably to the interception surface of the water-washing filter screen 4. Larger impurities will be physically intercepted by the rod arrays and confined to the opening of the filter chamber. Unlike using a baffle, it will not create unstable turbulence, which could cause lighter impurities inside to be blown out at the air inlet, affecting the stable collection effect of impurities.

[0029] This utility model provides an air purification structure for a medical cleanroom, specifically a structure for driving the mounting bracket 3 to reciprocate to switch the connection state of the filter chamber, such as... Figure 1As shown, specifically, a rack 6 is provided on the top of the mounting bracket 3, and an opening is provided on the top of the air duct 1 to expose the rack 6. That is, the toothed part of the rack 6 is actually located below the opening of the air duct. It should be noted that in this setting, the rack 6 is in a concave state during the sliding process of the mounting bracket 3, and will not actually affect the sliding sealing assembly between the mounting bracket 3 and the socket. The driving device 5 is a motor assembly set on the air duct 1, and a drive disk 7 is provided on the output shaft of the motor assembly. Finally, the outer circumferential surface of the drive disk 7 is provided with teeth that mesh with the rack 6. In order to control the movement accuracy, attention should be paid to the density of the teeth, and servo control should be used to ensure that the positional accuracy after movement can meet the working requirements. In some other embodiments, contact sensors can be set at both ends to avoid excessive displacement of the mounting bracket 3. The contact sensors provide on / off control signals, thereby realizing the motor control operation and simplifying the position confirmation method of the mounting bracket 3.

[0030] This utility model provides an air purification structure for a medical cleanroom. To reduce the frequency of replacing the water-washable filter 4 and eliminate the need for frequent replacements, the structure includes a cleaning structure mounted on the air duct 1. This cleaning structure includes a positioning plate 10 and a spray pipe 11 mounted on the positioning plate 10. The nozzle of the spray pipe 11 is positioned to point towards the water-washable filter 4. After the filter chamber is moved out by the driving device 5, the spray pipe 11 sprays and washes the surface of the water-washable filter 4, discharging any adhering impurities through the opening at the bottom of the filter chamber. This achieves a certain level of cleanliness on the filter surface, allowing it to return to its working position for further filtration. To reduce the size of the mounting frame 3 and lower the system load, only two filter chambers are provided. Therefore, cleaning of these two chambers requires cleaning on both sides of the air duct 1. Preferably, two sets of cleaning structures are provided and installed on both sides of the air duct 1.

[0031] This utility model provides an air purification structure for a medical cleanroom, specifically offering a cleaning method. For washable filter screens and filter papers such as foam filters or cloth filters, water washing is more conducive to cleaning the surface of the water-washable filter screen 4. Therefore, as a preferred embodiment, the cleaning structure can also include an air jet pipe 13 and a liquid spray pipe 14. As the names suggest, the air jet pipe 13 is used to supply gas, and the liquid spray pipe 14 is used to supply cleaning liquid. The spray pipe 11 is connected to the air jet pipe 13 and the liquid spray pipe 14 respectively through a three-way solenoid valve 12, which can realize the water-washable filter screen 4 being washed with water first and then with air. Water washing is used to clean impurities on the surface of the water-washable filter screen 4, while air washing is used to quickly dry the residual moisture. According to the requirements, a corresponding heating wire can be installed on the air supply line to heat the air path and quickly dry the surface of the water-washable filter screen 4. The water-washable filter screen used in this invention not only effectively filters fine dust but also has a water-washing function. Through the design of the above structure, when excessive impurities accumulate on the surface of the water-washable filter screen 4, it can be quickly and easily rinsed and cleaned without manual intervention, allowing the water-washable filter screen to be reused. After the water-washable filter screen 4 dries, it waits to be reset and reconnected to the air duct system. Furthermore, during the rinsing and drying steps, another spare air chamber will maintain communication with the working air duct, allowing the air duct system to perform normal operation without waiting while cleaning the water-washable filter screen 4. That is, the cleaning and switching (not replacement) action of the water-washable filter screen 4 can be achieved without human intervention, ensuring long-term operation of the system without manual intervention, and the filtration operation of the system will not be interrupted when switching the water-washable filter screen 4. In addition, the gap design of the drain rod allows the rinsing water to pass normally through the drain rod, efficiently cleaning the water-washable filter screen 4 through gravity rinsing, ensuring the cleanliness of the filter surface of the water-washable filter screen 4, thereby extending the working time of the water-washable filter screen 4 and reducing the replacement frequency.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An air purification structure for a medical cleanroom, characterized in that, Includes a duct (1) and a drive device (5). The duct (1) is equipped with a high-efficiency air filter (2). The duct (1) has an opening. A mounting bracket (3) is slidably arranged in the opening. The mounting bracket (3) is located upstream of the air supply of the high-efficiency air filter (2). The mounting bracket (3) has at least two filter chambers inside. Each filter chamber is equipped with a water-washed filter screen (4) that fills the cross-sectional space of the chamber. The drive device (5) is used to drive the mounting bracket (3) to slide so that multiple filter chambers can switch between each other in the air path of the duct (1) and ensure that each filter chamber can form a separate connection with the air path system in the duct (1). Each of the filter chambers has an air inlet end equipped with an intercepting net (8), and each of the filter chambers has an opening at the bottom. The air duct (1) is located below the mounting bracket (3) and has a discharge port (9). The discharge port (9) is used to receive intercepted waste discharged from the bottom opening of the filter chamber. The interception net (8) includes a first row of rods (801) and a second row of rods (802) disposed at the air inlet end of the filter chamber. Both the first row of rods (801) and the second row of rods (802) are composed of multiple bent thin rods. The thin rods of the first row of rods (801) bend from top to bottom toward the water-washing filter (4), and the thin rods of the second row of rods (802) bend from bottom to top toward the water-washing filter (4). The bottom position of the thin rods of the first row of rods (801) is lower than the top position of the thin rods of the second row of rods (802). The distance between the bottom position of the thin rods of the first row of rods (801) and the water-washing filter (4) is greater than the distance between the top position of the thin rods of the second row of rods (802) and the water-washing filter (4).

2. The air purification structure for a medical cleanroom according to claim 1, characterized in that, The mounting bracket (3) is provided with a rack (6) at the top, the air duct (1) is provided with an opening at the top, the teeth of the rack (6) are provided below the opening of the air duct (1), the driving device (5) is a motor assembly provided on the air duct (1), the output shaft of the motor assembly is provided with a drive disk (7), and the outer circumferential surface of the drive disk (7) is provided with teeth that contact the rack (6).

3. The air purification structure for a medical cleanroom according to claim 2, characterized in that, It also includes a cleaning structure set on the air duct (1), the cleaning structure including a positioning plate (10) and a spray pipe (11) installed on the positioning plate (10), the nozzle of the spray pipe (11) pointing to the position of the water washing filter (4).

4. The air purification structure for a medical cleanroom according to claim 3, characterized in that, The cleaning structure is provided in two sets and is installed on both sides of the air duct (1).

5. The air purification structure for a medical cleanroom according to claim 4, characterized in that, It also includes a jet pipe (13) and a liquid spray pipe (14), wherein the jet pipe (11) is connected to the jet pipe (13) and the liquid spray pipe (14) respectively via a three-way solenoid valve (12).

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