A hospital purifier

CN224771687UActive Publication Date: 2026-09-18THE SECOND AFFILIATED HOSPITAL OF GUANGXI MEDICAL UNIV
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Patent Information

Application Number
CN202522108338.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-30
Publication Date
2026-09-18
Estimated Expiration
2035-09-30

AI Technical Summary

Technical Problem

[0004]有鉴于此,本实用新型的目的在于提出一种医院用净化器,以解决现有设备送风方向不可调和空气分布不均的问题

Benefits of technology

[0015]By installing casters at the four corners of the rectangular cabinet, the equipment can be moved more easily between different areas within the hospital, meeting the needs of various usage scenarios. An air inlet mounting frame with an air inlet grille is installed on one side of the rectangular cabinet, reducing the direct entry of large particles and foreign objects, while also facilitating regular disassembly and cleaning. The air outlet mounting frame on the other side is equipped with an adjustment component. Utilizing multiple sets of rotatable mounting columns and an air outlet adjustment plate, the air outlet direction can be flexibly adjusted by rotating a knob to drive a connecting rod. This allows purified air to be directionally delivered according to the layout of the wards or the needs of key areas, thereby improving the uniformity of air distribution and the purification effect. The filter component uses a pre-filter plate... The multi-stage combination structure of medium-efficiency and high-efficiency filter plates, with rubber sealing strips at the contact points with the inner wall of the cabinet, ensures the sealing between each filter plate and the airflow guidance, preventing air from circling the filter layer and improving filtration efficiency and purification quality. The centrifugal fan structure below the high-efficiency filter plate is coaxially connected to the centrifugal impeller and servo motor, ensuring strong air delivery power and stable operation. The air supply and outlet mounting frames are at the same height, ensuring a smooth air delivery path and reducing resistance. The overall structural design is reasonable, with clear installation positions and tight fit between components, which not only improves the air handling efficiency and adaptability of the purifier, but also facilitates subsequent maintenance and replacement, enhancing the practicality and reliability of the equipment in hospital environments.

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Abstract

The utility model relates to air purification equipment technical field, concretely relates to a hospital purifier, include: rectangular cabinet, the bottom end four corners of rectangular cabinet are installed with a set of universal wheel respectively, and the upper side wall of one side of rectangular cabinet is equipped with air inlet mounting frame, installs air inlet grille board in air inlet mounting frame, the lower side wall of the other side of rectangular cabinet is equipped with air outlet mounting frame, is equipped with adjusting assembly on air outlet mounting frame, and adjusting assembly is used for adjusting the air flow direction that blows out from air outlet mounting frame, be equipped with filter assembly in rectangular cabinet, and filter assembly is used for purifying the air that enters from air inlet mounting frame, the utility model discloses the purpose is in to propose a hospital purifier to solve the problem that the air distribution of existing equipment air supply direction is not adjustable and uneven.
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Description

Technical Field

[0001] This utility model relates to the field of air purification equipment technology, and in particular to a purifier for use in hospitals. Background Technology

[0002] With the continuous development of the medical and health industry, hospitals have increasingly stringent requirements for indoor air quality, especially in key areas such as operating rooms, ICUs, and isolation wards. To reduce the concentration of bacteria, viruses, dust, and harmful gases in the air, hospital air purifiers with multi-stage filtration are typically installed. These devices use pre-filters, medium-efficiency filters, and high-efficiency filters to purify the air entering the room in stages. Some devices also incorporate activated carbon adsorption or other odor-removing components to achieve continuous air circulation and purification. During operation, the filter components of hospital air purifiers gradually accumulate dust and pollutants over time, requiring regular cleaning, replacement, or maintenance to ensure their purification efficiency and lifespan.

[0003] In existing technologies, some devices have fixed air outlets, allowing air to exit in only one direction. This makes it difficult to flexibly adjust the airflow direction according to ward layout, personnel distribution, or the purification needs of specific areas, resulting in uneven distribution of purified air in localized areas and hindering the overall balanced improvement of air quality. Furthermore, although existing devices generally employ multi-layer filtration units, the sealing and airflow guidance designs between different filter layers are often inadequate, easily causing some air to bypass certain filter layers, reducing filtration efficiency and impracticality. Therefore, this utility model discloses a hospital air purifier to solve the problems of non-adjustable airflow direction and uneven air distribution in existing devices. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a hospital air purifier to solve the problems of non-adjustable air supply direction and uneven air distribution in existing equipment.

[0005] To achieve the above objectives, this utility model provides a hospital air purifier, comprising: a rectangular cabinet, with a set of casters installed at each of the four corners of the bottom of the rectangular cabinet; an air inlet mounting frame on the upper side wall of one side of the rectangular cabinet, with an air inlet grille installed inside the air inlet mounting frame; an air outlet mounting frame on the lower side wall of the other side of the rectangular cabinet, with an adjustment component on the air outlet mounting frame for adjusting the airflow direction from the air outlet mounting frame; and a filter assembly inside the rectangular cabinet for purifying the air entering from the air inlet mounting frame.

[0006] Preferably, a first rectangular slot with the same length and width as the air inlet mounting frame is provided on the rectangular cabinet at the position corresponding to the position of the air inlet mounting frame, and a second rectangular slot with the same length and width as the air outlet mounting frame is provided on the rectangular cabinet at the position corresponding to the position of the air outlet mounting frame.

[0007] Preferably, the adjustment component includes multiple sets of mounting columns, with both ends of the multiple sets of mounting columns evenly arrayed and installed on the inner walls of both ends of the air outlet mounting frame. Each set of mounting columns has an air outlet adjustment plate installed on the side wall near the outer end of the air outlet mounting frame. One end of each set of mounting columns penetrates and protrudes from the outer wall of the air outlet mounting frame. A rotary knob is installed at the end of the mounting column that penetrates and protrudes from the outer wall of the air outlet mounting frame. A connecting rod is jointly installed on the side wall near the outer end of the air outlet mounting frame of the multiple sets of air outlet adjustment plates.

[0008] Preferably, the inner wall of the air outlet mounting frame is provided with circular grooves at both ends of each set of mounting columns. The diameter of the circular grooves is the same as the outer diameter of the mounting columns, and multiple sets of mounting columns are rotatably installed in each set of circular grooves at corresponding positions.

[0009] Preferably, a first circular hole is provided on the air outlet mounting frame at the position of the mounting post that penetrates through and protrudes from the outer wall of the air outlet mounting frame, and the inner diameter of the first circular hole is the same as the diameter of the mounting post, and the position where the mounting post abuts against the first circular hole is coated with an anti-slip layer.

[0010] Preferably, each set of air outlet adjustment plates has a square groove with the same thickness as the air outlet adjustment plate at the position corresponding to the connecting rod, and a first rotating rod is installed on the inner wall of each set of square grooves. A second circular hole is opened on the connecting rod at the position corresponding to the first rotating rod of each set, and the diameter of the first rotating rod and the second circular hole are the same, and the first rotating rod is rotatably installed in the second circular hole.

[0011] Preferably, the filter assembly includes a primary filter plate installed on the upper inner wall of the rectangular cabinet cavity, a medium-efficiency filter plate installed below the primary filter plate on the inner wall of the rectangular cabinet cavity, and a high-efficiency filter plate installed below the medium-efficiency filter plate on the inner wall of the rectangular cabinet cavity. Rubber sealing strips are provided at the locations where the primary, medium, and high-efficiency filters meet the inner wall of the rectangular cabinet cavity. A centrifugal fan is installed below the high-efficiency filter plate. The centrifugal fan is sealed, and a centrifugal impeller is located within its inner cavity. An air outlet is opened on one side wall of the centrifugal fan and is connected to an air outlet mounting frame. A servo motor is installed at the center of the bottom of the centrifugal fan, and the output end of the servo motor is connected to the center of the centrifugal impeller. The bottom of the centrifugal fan is fixedly installed on the side wall of the servo motor by a fixing rod. A fixing column is installed at the other end of the servo motor, and the other end of the fixing column is installed on the bottom wall of the rectangular cabinet cavity.

[0012] Preferably, the primary filter plate, the medium-efficiency filter plate, and the high-efficiency filter plate are all snapped and fixedly installed on the inner wall of the rectangular cabinet, and a gap is left between the primary filter plate, the medium-efficiency filter plate, and the high-efficiency filter plate.

[0013] Preferably, the height of the air supply outlet is the same as the height of the air outlet mounting frame.

[0014] The beneficial effects of this utility model are:

[0015] By installing casters at the four corners of the rectangular cabinet, the equipment can be moved more easily between different areas within the hospital, meeting the needs of various usage scenarios. An air inlet mounting frame with an air inlet grille is installed on one side of the rectangular cabinet, reducing the direct entry of large particles and foreign objects, while also facilitating regular disassembly and cleaning. The air outlet mounting frame on the other side is equipped with an adjustment component. Utilizing multiple sets of rotatable mounting columns and an air outlet adjustment plate, the air outlet direction can be flexibly adjusted by rotating a knob to drive a connecting rod. This allows purified air to be directionally delivered according to the layout of the wards or the needs of key areas, thereby improving the uniformity of air distribution and the purification effect. The filter component uses a pre-filter plate... The multi-stage combination structure of medium-efficiency and high-efficiency filter plates, with rubber sealing strips at the contact points with the inner wall of the cabinet, ensures the sealing between each filter plate and the airflow guidance, preventing air from circling the filter layer and improving filtration efficiency and purification quality. The centrifugal fan structure below the high-efficiency filter plate is coaxially connected to the centrifugal impeller and servo motor, ensuring strong air delivery power and stable operation. The air supply and outlet mounting frames are at the same height, ensuring a smooth air delivery path and reducing resistance. The overall structural design is reasonable, with clear installation positions and tight fit between components, which not only improves the air handling efficiency and adaptability of the purifier, but also facilitates subsequent maintenance and replacement, enhancing the practicality and reliability of the equipment in hospital environments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a first-view three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a two-dimensional structural diagram of the present invention from a second perspective;

[0019] Figure 3 This is a three-dimensional structural diagram of the internal parts of this utility model;

[0020] Figure 4 This is an enlarged structural schematic diagram of the centrifugal fan of this utility model;

[0021] Figure 5 This is an enlarged structural schematic diagram of the adjustment component of this utility model.

[0022] The diagram is marked as follows:

[0023] 1. Rectangular cabinet; 2. Air inlet mounting frame; 3. Air inlet grille; 4. Casters; 5. Air outlet mounting frame; 6. Primary filter plate; 7. Medium-efficiency filter plate; 8. High-efficiency filter plate; 9. Centrifugal fan; 10. Servo motor; 11. Fixed column; 12. Air outlet adjusting plate; 13. Mounting column; 14. Rotary knob; 15. Connecting rod; 16. Centrifugal impeller; 17. Air outlet. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0025] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] This utility model provides, for example Figures 1 to 5 The air purifier for hospitals shown includes: a rectangular cabinet 1, with a set of casters 4 installed at each of the four corners of the bottom of the rectangular cabinet 1; an air inlet mounting frame 2 is provided on the upper side wall of one side of the rectangular cabinet 1, with an air inlet grille 3 installed inside the air inlet mounting frame 2; an air outlet mounting frame 5 is provided on the lower side wall of the other side of the rectangular cabinet 1; a first rectangular slot with the same length and width as the air inlet mounting frame 2 is opened on the rectangular cabinet 1 at the position corresponding to the position of the air inlet mounting frame 2; and a second rectangular slot with the same length and width as the air outlet mounting frame 5 is opened on the rectangular cabinet 1 at the position corresponding to the position of the air outlet mounting frame 5; an adjustment component is provided on the air outlet mounting frame 5 to adjust the airflow direction blown out from the air outlet mounting frame 5; and a filter component is provided inside the rectangular cabinet 1 to purify the air entering from the air inlet mounting frame 2.

[0027] By installing casters 4 at the four corners of the bottom of the rectangular cabinet 1, the equipment can be moved more easily between different areas within the hospital, meeting the needs of multiple usage scenarios. An air inlet mounting frame 2, along with an air inlet grille 3, is installed on one side of the rectangular cabinet 1 to reduce the direct entry of large particles and foreign objects, while also facilitating regular disassembly and cleaning. The air outlet mounting frame 5 on the other side is equipped with an adjustment component. Utilizing multiple rotatable mounting columns 13 and an air outlet adjustment plate 12, the air outlet direction can be flexibly adjusted by rotating the knob 14 to drive the connecting rod 15. This allows purified air to be directionally delivered according to the layout of the wards or the needs of key areas, thereby improving the uniformity of air distribution and the purification effect. The filter component uses a pre-filter plate. 6. The multi-stage combination structure of medium-efficiency filter plate 7 and high-efficiency filter plate 8, with rubber sealing strips at the contact points with the inner wall of the cabinet, ensures the sealing between each filter plate and the airflow guidance, preventing air from circling the filter layer and improving filtration efficiency and purification quality. The centrifugal fan 9 below the high-efficiency filter plate 8 is coaxially connected to the centrifugal impeller 16 and servo motor 10, ensuring strong air delivery power and stable operation. The air outlet 17 is at the same height as the air outlet mounting frame 5, ensuring a smooth air delivery path and reducing resistance. The overall structural design is reasonable, with clear installation positions and tight fit between components, which not only improves the air handling efficiency and adaptability of the purifier, but also facilitates subsequent maintenance and replacement, enhancing the practicality and reliability of the equipment in the hospital environment.

[0028] Furthermore, in this example, such as Figure 2 and Figure 5As shown, the adjustment assembly includes multiple sets of mounting columns 13. The two ends of the multiple sets of mounting columns 13 are evenly arrayed and installed on the inner walls of both ends of the air outlet mounting frame 5. Each set of mounting columns 13 has an air outlet adjustment plate 12 installed on one side wall near the outer end of the air outlet mounting frame 5. One end of each set of mounting columns 13 penetrates and protrudes from the outer wall of the air outlet mounting frame 5. A rotary knob 14 is installed at the end of the mounting column 13 that penetrates and protrudes from the outer wall of the air outlet mounting frame 5. A connecting rod 15 is installed on the side wall near the outer end of the multiple sets of air outlet adjustment plates 12. Circular grooves are formed on the inner wall of the air outlet mounting frame 5 corresponding to the positions of both ends of each set of mounting columns 13. The diameter of the circular grooves is the same as the outer diameter of the mounting column 13. The mounting columns 13 are rotatably installed in each set of circular grooves at corresponding positions. The air outlet mounting frame 5 has a first circular hole at the position of the mounting column 13 that passes through and protrudes from the outer wall of the air outlet mounting frame 5. The inner diameter of the first circular hole is the same as the diameter of the mounting column 13. The position where the mounting column 13 abuts against the first circular hole is coated with an anti-slip layer. Each set of air outlet adjusting plates 12 has a square groove with the same thickness as the air outlet adjusting plate 12 at the position of the connecting rod 15. The inner wall of each set of square grooves is equipped with a first rotating rod. The connecting rod 15 has a second circular hole at the position of each set of first rotating rods. The diameter of the first rotating rod is the same as that of the second circular hole. The first rotating rod is rotatably installed in the second circular hole.

[0029] The adjustment assembly consists of multiple sets of mounting columns 13. The two ends of each mounting column 13 are evenly arrayed and installed within circular grooves on the inner walls of both ends of the air outlet mounting frame 5, allowing for rotatable connection within these grooves. Each set of mounting columns 13 has an air outlet adjustment plate 12 fixedly installed on the side wall near the outer end of the air outlet mounting frame 5 to guide airflow. One end of each mounting column 13 penetrates and protrudes from the outer wall of the air outlet mounting frame 5, and a rotary knob 14 is installed at the end. When the operator rotates the rotary knob 14, it causes the mounting column 13 to rotate synchronously, thereby driving the air outlet adjustment plate 12 fixed thereon to adjust its angle synchronously around the axis of the mounting column 13. Multiple sets of air outlet adjustment plates 12 are hinged together on one side near the outer end of the air outlet mounting frame 5 via a connecting rod 15. Each set of air outlet adjustment plates 12 has a square groove corresponding to the position of the connecting rod 15, and a first rotating rod is installed in the square groove. A second circular hole is opened on the connecting rod 15 corresponding to the position of the first rotating rod. The first rotating rod rotates and engages in the second circular hole, thereby realizing the linkage of multiple sets of air outlet adjustment plates 12 during rotation. The contact position between the mounting column 13 and the first circular hole on the outer wall of the air outlet mounting frame 5 is coated with an anti-slip layer to increase friction and prevent the adjustment plate from shifting due to airflow impact, thereby ensuring the stability and accuracy of air outlet direction adjustment.

[0030] Furthermore, in this example, such as Figure 3 and Figure 4As shown, the filter assembly includes a primary filter plate 6, which is installed on the upper inner wall of the rectangular cabinet 1. A medium-efficiency filter plate 7 is located below the primary filter plate 6 on the inner wall of the rectangular cabinet 1, and a high-efficiency filter plate 8 is located below the medium-efficiency filter plate 7 on the inner wall of the rectangular cabinet 1. Rubber sealing strips are provided at the points where the primary filter plate 6, medium-efficiency filter plate 7, and high-efficiency filter plate 8 meet the inner wall of the rectangular cabinet 1. A centrifugal fan 9 is located below the high-efficiency filter plate 8. The centrifugal fan 9 is sealed, and a centrifugal impeller 16 is located inside its cavity. An air outlet 17 is opened on one side wall of the centrifugal fan 9, and the air outlet 17 is mounted on a frame 5. Connecting to the centrifugal fan 9, a servo motor 10 is installed at the bottom center. The output end of the servo motor 10 is connected to the middle of the centrifugal impeller 16. The bottom of the centrifugal fan 9 is fixedly installed on the side wall of the servo motor 10 by a fixing rod. A fixing column 11 is installed at the other end of the servo motor 10. The other end of the fixing column 11 is installed on the bottom wall of the inner cavity of the rectangular cabinet 1. The primary filter plate 6, the medium-efficiency filter plate 7, and the high-efficiency filter plate 8 are all snapped and fixedly installed on the inner wall of the rectangular cabinet 1. A gap is left between the primary filter plate 6, the medium-efficiency filter plate 7, and the high-efficiency filter plate 8. The height of the air outlet 17 is the same as the height of the air outlet mounting frame 5.

[0031] The filtration assembly includes a pre-filter plate 6, a medium-efficiency filter plate 7, and a high-efficiency filter plate 8, sequentially installed from the upper to the lower part of the inner cavity of the rectangular cabinet 1. Rubber sealing strips are installed at the contact points between each filter and the inner wall of the rectangular cabinet 1 to ensure that airflow can only pass through the filter material and does not bypass it through gaps, thus improving filtration efficiency. During operation, air enters the rectangular cabinet 1 through the air inlet grille plate 3 within the air inlet mounting frame 2. It first passes through the pre-filter plate 6 to remove larger dust and impurities, then through the medium-efficiency filter plate 7 to trap finer dust and some microorganisms, and finally through the high-efficiency filter plate 8 to effectively remove micron- and submicron-sized suspended particles, bacteria, and viruses, thereby significantly improving air cleanliness. The purified air enters the centrifugal fan 9 located below the high-efficiency filter plate 8. The centrifugal fan 9 has a centrifugal impeller 16 inside, which is driven to rotate by a servo motor 10 installed at the bottom center. The impeller is fixed to the side wall of the servo motor 10 by a fixing rod, and the other end of the servo motor 10 is fixed to the bottom wall of the inner cavity of the rectangular cabinet 1 by a fixing column 11. When the centrifugal impeller 16 rotates at high speed, it pressurizes the air and smoothly delivers it to the regulating component through the air outlet 17, which is at the same height as the air outlet mounting frame 5. This avoids additional resistance and turbulence, thus ensuring air delivery efficiency and uniform delivery of purified air. The purified air volume can be designed to be 300-1000 m³ / h as needed. 3 / h, and applicable ward area is 30-80㎡.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0033] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hospital purifier, characterized by comprising: include: A rectangular cabinet (1) is provided with a set of casters (4) installed at the four corners of the bottom end of the rectangular cabinet (1). An air inlet mounting frame (2) is provided on the upper side wall of one side of the rectangular cabinet (1). An air inlet grille (3) is installed inside the air inlet mounting frame (2). An air outlet mounting frame (5) is provided on the lower side wall of the other side of the rectangular cabinet (1). An adjustment component is provided on the air outlet mounting frame (5). The adjustment component is used to adjust the airflow direction blown out from the air outlet mounting frame (5). A filter component is provided inside the rectangular cabinet (1). The filter component is used to purify the air entering from the air inlet mounting frame (2).

2. A hospital purifier according to claim 1, characterised in that The rectangular cabinet (1) has a first rectangular slot with the same length and width as the air inlet mounting frame (2) at the position corresponding to the air inlet mounting frame (2), and the rectangular cabinet (1) has a second rectangular slot with the same length and width as the air outlet mounting frame (5) at the position corresponding to the air outlet mounting frame (5).

3. A hospital purifier according to claim 2, characterised in that The adjustment assembly includes multiple sets of mounting columns (13). The two ends of the multiple sets of mounting columns (13) are evenly arrayed and installed on the inner walls of both ends of the air outlet mounting frame (5). Each set of mounting columns (13) has an air outlet adjustment plate (12) installed on one side wall near the outer end of the air outlet mounting frame (5). One end of one set of mounting columns (13) penetrates and protrudes from the outer wall of the air outlet mounting frame (5). A rotary knob (14) is installed at the end of the mounting column (13) that penetrates and protrudes from the outer wall of the air outlet mounting frame (5). A connecting rod (15) is installed on one side wall near the outer end of the air outlet mounting frame (5) of the multiple sets of air outlet adjustment plates (12).

4. A hospital air purifier according to claim 3, characterized in that, The inner wall of the air outlet mounting frame (5) is provided with circular grooves at both ends of each set of mounting columns (13). The diameter of the circular grooves is the same as the outer diameter of the mounting columns (13), and multiple sets of mounting columns (13) are rotated in each set of circular grooves at the corresponding positions.

5. A hospital purifier according to claim 4, characterised in that The air outlet mounting frame (5) has a first circular hole at the position of the mounting post (13) that passes through and protrudes from the outer wall of the air outlet mounting frame (5). The inner diameter of the first circular hole is the same as the diameter of the mounting post (13). The mounting post (13) and the first circular hole are coated with an anti-slip layer at the positions where they abut against each other.

6. A hospital purifier according to claim 5, characterised in that Each set of air outlet adjustment plates (12) has a square groove with the same thickness as the air outlet adjustment plate (12) at the position corresponding to the connecting rod (15). Each set of square grooves has a first rotating rod installed on its inner wall. Each set of connecting rods (15) has a second round hole at the position corresponding to the first rotating rod. The diameter of the first rotating rod is the same as that of the second round hole. The first rotating rod is rotatably installed in the second round hole.

7. A hospital purifier according to claim 6, characterised in that The filter assembly includes a primary filter plate (6), which is installed on the upper inner wall of the rectangular cabinet (1). A medium-efficiency filter plate (7) is located below the primary filter plate (6) on the inner wall of the rectangular cabinet (1). A high-efficiency filter plate (8) is located below the medium-efficiency filter plate (7) on the inner wall of the rectangular cabinet (1). Rubber sealing strips are provided at the points where the primary filter plate (6), the medium-efficiency filter plate (7), and the high-efficiency filter plate (8) meet the inner wall of the rectangular cabinet (1). A centrifugal fan (9) is located below the high-efficiency filter plate (8). The centrifugal fan (9) is sealed. The inner cavity of the fan (9) is provided with a centrifugal impeller (16), and an air outlet (17) is provided on one side wall of the centrifugal fan (9). The air outlet (17) is connected to the air outlet mounting frame (5). A servo motor (10) is installed in the middle of the bottom end of the centrifugal fan (9). The output end of the servo motor (10) is connected to the middle of the centrifugal impeller (16). The bottom end of the centrifugal fan (9) is fixedly installed on the side wall of the servo motor (10) by a fixing rod. A fixing column (11) is installed at the other end of the servo motor (10). The other end of the fixing column (11) is installed on the bottom wall of the inner cavity of the rectangular cabinet (1).

8. A hospital purifier according to claim 7, characterised in that The primary filter plate (6), the medium-efficiency filter plate (7), and the high-efficiency filter plate (8) are all snapped and fixedly installed on the inner wall of the rectangular cabinet (1), and gaps are left between the primary filter plate (6), the medium-efficiency filter plate (7), and the high-efficiency filter plate (8).

9. A hospital air purifier according to claim 8, characterized in that, The height of the air inlet (17) is the same as the height of the air outlet mounting frame (5).