Purification type fresh air ventilator applied to medical places

Abstract

The invention discloses a purification type fresh air ventilator applied to a medical place, and relates to the technical field of ventilators, the purification type fresh air ventilator comprises a shell, an air draft unit and an air inlet unit are arranged on the two sides of the interior of the shell respectively, and a processing unit is arranged between the air draft unit and the air inlet unit; the two sides of the treatment unit are each provided with a filtering and cleaning assembly and a protection assembly. According to the device, a driving motor drives a reciprocating lead screw to rotate, a rectangular lead screw sleeve drives a connecting block and a cleaning brush to move, the surface of a filter screen is cleaned through the cleaning brush, it is guaranteed that the air exchange amount is stable, secondary pollution caused by accumulated dust is avoided, and the maintenance cost and the shutdown cleaning time of a product in the using process are reduced; and in the upward moving process of the connecting block, dust generated after cleaning can be extracted in an auxiliary mode through an air bag, an air inlet pipe, a collecting box and a collecting frame, the phenomenon that the dust drifts away in the shell is reduced, and the using effect of the product is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilators, and more particularly to a purification-type fresh air ventilator used in medical settings. Background Art

[0002] The fresh air system is an independent air treatment system composed of a fresh air ventilator and pipe accessories. It relies on mechanical air supply and induction to form a fresh air flow field in the system. It can remove polluted air from the room while inputting natural fresh air. The fresh air input into the room is first filtered, sterilized, heated, and oxygenated.

[0003] For example, Chinese patent document (CN114562778A) discloses a purification air conditioning and fresh air system for a hospital operating room, comprising a fresh air air conditioner. The fresh air conditioner has a bracket mounted on its inner wall, a V-shaped grid mounted on the bracket, an air handling unit disposed within the clamping area of ​​the grid, and a corner of the air handling unit connected to the inner wall of the fresh air conditioner via a partition plate. The air handling unit comprises an indoor air handling mechanism and an outdoor air handling mechanism. The indoor air handling mechanism comprises a first filter box, a second filter box, a third filter box, and a fourth filter box, the first, second, third, and fourth filter boxes being spaced apart along the direction of outdoor air outlet. The fresh air conditioner has a built-in air handling unit. The indoor and outdoor air handling mechanisms of the air handling unit cooperate with the ventilation mechanism and the exhaust mechanism to exchange air between the operating room and the outside, thereby ensuring clean air in the operating room. However, during use, dust from the external fresh air may enter the air handling unit, potentially increasing its load and, over time, affecting the overall treatment and ventilation effects of the unit. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that dust in the external fresh air may enter the interior of the air treatment device during use, which may increase the load of the air treatment device and affect the overall treatment effect and ventilation effect of the device after a long time. A purification-type fresh air ventilator for use in medical places is proposed.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: A purification-type fresh air ventilator for use in medical facilities, comprising a housing, an exhaust unit and an air inlet unit are respectively provided on both sides of the interior of the housing, a processing unit is provided between the exhaust unit and the air inlet unit, a filtering and cleaning component and a protective component are respectively provided on both sides of the processing unit, connecting pipes are connected on both sides of the exhaust unit and the air inlet unit, and an auxiliary connecting component is provided on one side of the housing; The filtering and cleaning assembly includes a collecting frame and two connecting seats, a filter screen is arranged between the two connecting seats, a reciprocating screw is rotatably connected inside the connecting seat on one side, a rectangular screw sleeve is transmission-connected to the reciprocating screw, one side of the rectangular screw sleeve is fixedly connected to a connecting block, and the other side of the connecting block extends to the outside of the connecting seat and is fixedly connected to a cleaning brush.

[0006] Furthermore, the reciprocating screw is provided with bidirectional cross threads, the bottom end of the reciprocating screw extends into the interior of the collection frame and is fixedly connected to a drive motor, and the bottom of the drive motor is fixedly connected to the inner wall of the collection frame.

[0007] Furthermore, the bottom of the collection frame is fixedly connected to the inner wall of the shell, the bottom of the connecting seat is fixedly connected to the top of the collection frame, and a collection box is provided inside the collection frame.

[0008] Furthermore, the rectangular screw sleeve and the connecting block are both slidably connected inside the connecting seat, the cross-sectional shape of the connecting block is set to be L-shaped, air bags are provided on both sides of the connecting block, and the other side of the air bag is fixedly connected to the inner wall of the connecting seat, and the cleaning brush is provided on the side opposite to the filter screen, and one side of the air bag is connected to the collection box through the air inlet pipe, and one side of the air bag is connected to the air outlet pipe, and a one-way valve is provided on the air outlet pipe and the air inlet pipe.

[0009] Furthermore, the protective assembly includes a first cone block, one side of which is fixedly connected to the outer wall of the rectangular screw sleeve, a second cone block is provided on the side of the first cone block away from the rectangular screw sleeve, and a fixed block is fixedly connected to the center of the other side of the second cone block, and the fixed block extends to the outside of the connecting seat and is provided with a protective frame.

[0010] Furthermore, the fixed block is slidably connected to the inside of the connecting seat, and springs are provided on both sides of the fixed block. Both sides of the spring are fixedly connected to the second cone block and the inner wall of the connecting seat respectively.

[0011] Furthermore, a vertical plate is slidably connected to one side of the interior of the protective frame, one side of the vertical plate is fixedly connected to one side of the fixed block, a plurality of racks are linearly distributed on the side of the vertical plate away from the fixed block, a gear is meshed and connected to the bottom side of the rack, a connecting shaft is fixedly connected to the interior of the gear, the other end of the connecting shaft extends to the outside of the protective frame and is provided with a protective blade, the connecting shaft is rotatably connected to the interior of the protective frame, the cross-sectional shape of the protective frame is set to be rectangular, and a sealing layer is provided on the outer peripheral side of the protective blade.

[0012] Furthermore, the auxiliary connecting assembly includes two arc blocks, which are arranged on the outer peripheral side of the connecting pipe, and one side of the arc block is fixedly connected to the outer wall of the shell, and the arc block is fixedly connected to a fixed frame on the side away from the shell, and the inner side of the fixed frame is rotatably connected to a rotating shaft, one end of the rotating shaft extends to the outside of the fixed frame and is fixedly connected to a rotating handle, and the end of the rotating shaft away from the rotating handle is fixedly connected to a first bevel gear.

[0013] Furthermore, the first bevel gear is arranged inside the fixed frame, and one side of the first bevel gear is meshedly connected to the second bevel gear, the second bevel gear is fixedly connected to a fixed shaft inside, one end of the fixed shaft is rotatably connected to the inside of the fixed frame, and the other end of the fixed shaft is fixedly connected to a lead screw.

[0014] Furthermore, a sliding block is provided on the outer peripheral side of the screw through the screw seat, and the sliding block is slidably connected to the inside of the fixed frame. One side of the two sliding blocks extends to the outside of the fixed frame and is fixedly connected to the same fixed seat. One side of the fixed seat is fixedly connected to a telescopic tube, and the end of the telescopic tube away from the fixed seat is slidably sealed inside the connecting pipe.

[0015] Compared with the existing technology, the beneficial effects of this solution are as follows: 1. This solution sets up a filtering and cleaning component, and the filter will filter the gas during the use of the exhaust unit and the air inlet unit to prevent dust in the gas from entering the shell during the ventilation process inside the medical facility, thereby preventing the treatment effect of the treatment unit from being affected after a long time. The driving motor drives the reciprocating screw to rotate, and the rectangular screw sleeve drives the connecting block and the cleaning brush to move. The filter surface is cleaned by the cleaning brush to ensure stable ventilation volume and avoid secondary pollution due to dust accumulation. The maintenance cost and downtime for cleaning of the product during use are reduced, making it suitable for high-frequency ventilation needs in medical facilities. In the process of the connecting block moving upward, the air bag on the bottom side will be stretched. The air bag will assist in extracting the cleaned dust through the air inlet pipe, collection box and collection frame, reducing the dust from floating inside the shell and further improving the use effect of the product.

[0016] 2. This solution uses a protective component to enable the rectangular screw sleeve to drive the first cone block to move upward, and squeeze the second cone block, spring, fixed block and vertical plate, so that the vertical plate drives the gear, connecting shaft and protective blade to rotate through the rack, so that the protective blade protects the shell to prevent dust from entering the processing unit during the cleaning process, thereby preventing the processing effect of the processing unit from being affected.

[0017] 3. This solution sets up an auxiliary connection component, which enables the staff to manually operate the handle to drive the rotating shaft, the first bevel gear, the second bevel gear, the fixed shaft and the screw to rotate, so that the screw seat drives the sliding block, the fixed seat and the telescopic tube to move, and adjusts the use distance between the telescopic tube and the connecting pipe, thereby reducing the impact of dimensional deviation of the product during on-site installation, speeding up the construction progress, making this product suitable for installation needs in different situations, and effectively improving the applicability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure for embodying the present invention; Figure 2 It is a schematic internal perspective diagram of a middle housing for embodying the present invention; Figure 3 It is a schematic diagram of the overall three-dimensional structure of the auxiliary connection assembly used to embody the present invention; Figure 4 It is a schematic diagram of the internal three-dimensional structure of the auxiliary connecting assembly and the connecting pipe used to embody the present invention; Figure 5 For the purpose of embodying the present invention Figure 4 A local enlarged structural diagram of point A; Figure 6 It is a schematic diagram of the overall three-dimensional structure of the filter cleaning component of the present invention; Figure 7 It is a schematic diagram of a partial three-dimensional structure of the filtering and cleaning component used to embody the present invention; Figure 8 For the purpose of embodying the present invention Figure 7 Schematic diagram of the local enlarged structure at point B.

[0019] Figure: 1, housing; 2, exhaust unit; 3, air inlet unit; 4, processing unit; 5, connecting pipe; 6, auxiliary connecting assembly; 601, arc block; 602, fixing frame; 603, first bevel gear; 604, turning handle; 605, second bevel gear; 606, lead screw; 607, sliding block; 608, fixing seat; 609, telescopic tube; 7, filter cleaning assembly; 701, collection frame; 702, collection box; 703, Connecting seat; 704, filter; 705, drive motor; 706, reciprocating screw; 707, rectangular screw sleeve; 708, connecting block; 709, cleaning brush; 710, airbag; 8, protective assembly; 801, first cone block; 802, second cone block; 803, spring; 804, fixed block; 805, vertical plate; 806, rack; 807, gear; 808, connecting shaft; 809, protective blade; 810, protective frame. DETAILED DESCRIPTION

[0020] The invention will be further described below in detail with reference to the accompanying drawings and through specific embodiments. The following embodiments are merely illustrative and do not limit the scope of protection of the present invention.

[0021] Example 1: A purification type fresh air ventilator used in medical places, such as Figures 1-8 As shown, it includes a housing 1, an exhaust unit 2 and an air inlet unit 3 are respectively provided on both sides of the housing 1, a processing unit 4 is provided between the exhaust unit 2 and the air inlet unit 3, a filtering and cleaning component 7 and a protective component 8 are respectively provided on both sides of the processing unit 4, the exhaust unit 2 and the air inlet unit 3 are both connected by a connecting pipe 5, and an auxiliary connecting component 6 is provided on one side of the housing 1; The filter cleaning component 7 includes a collection frame 701 and two connecting seats 703, a filter screen 704 is arranged between the two connecting seats 703, a reciprocating screw 706 is rotatably connected inside the connecting seat 703 on one side, a rectangular screw sleeve 707 is transmission-connected to the reciprocating screw 706, one side of the rectangular screw sleeve 707 is fixedly connected to a connecting block 708, the other side of the connecting block 708 extends to the outside of the connecting seat 703 and is fixedly connected to a cleaning brush 709, a bidirectional cross thread is provided on the reciprocating screw 706, the bottom end of the reciprocating screw 706 extends to the inside of the collection frame 701 and is fixedly connected to a drive motor 705, and the bottom of the drive motor 705 is fixedly connected to the inner wall of the collection frame 701 Then, the bottom of the collection frame 701 is fixedly connected to the inner wall of the shell 1, the bottom of the connecting seat 703 is fixedly connected to the top of the collection frame 701, and a collection box 702 is arranged inside the collection frame 701. The rectangular screw sleeve 707 and the connecting block 708 are both slidably connected to the inside of the connecting seat 703. The cross-sectional shape of the connecting block 708 is set to be L-shaped. Air bags 710 are arranged on both sides of the connecting block 708. The other side of the air bag 710 is fixedly connected to the inner wall of the connecting seat 703. The cleaning brush 709 is arranged on the side relative to the filter screen 704. One side of the air bag 710 is connected to the collection box 702 through the air inlet pipe. One side of the air bag 710 is connected to the air outlet pipe, and a one-way valve is provided on the air outlet pipe and the air inlet pipe.

[0022] In actual application, the shell 1 is first fixed in a suitable position, and then the two connecting pipes 5 are connected to the supply channel of the external medical site at one end away from the shell 1. The filter 704 will filter the gas during the use of the exhaust unit 2 and the air inlet unit 3 to prevent dust in the gas from entering the shell 1 during the ventilation process inside the medical site, thereby preventing the treatment effect of the treatment unit 4 from being affected after a long time. When the filter 704 needs to be cleaned after long-term use, the drive motor 705 is started according to actual needs, and the reciprocating screw 706 is driven to rotate by the drive motor 705. The linkage effect between the reciprocating screw 706 and the rectangular screw sleeve 707 is used to transmit power to the rectangular screw sleeve 707, so that the rectangular screw sleeve 707 drives the connecting block 708 and the cleaning brush 709 to move The surface of the filter 704 is cleaned by a cleaning brush 709 to ensure stable ventilation volume, avoid secondary pollution due to dust accumulation, reduce maintenance costs and downtime for cleaning during use of the product, and make it suitable for ventilation needs in high-frequency medical facilities. In the process of upward movement of the connecting block 708, the air bag 710 on the bottom side is stretched, and the air bag 710 assists in extracting the cleaned dust through the air inlet pipe, the collection box 702 and the collection frame 701, reducing the dust from floating inside the shell 1 and further improving the use effect of the product. According to actual needs, an exhaust unit is set inside the collection box 702 to enhance the dust extraction effect. The protective component 8 can be symmetrically set on both sides of the filter 704 according to actual needs, and the collection box 702 is set as a filter box according to actual needs.

[0023] Example 2: A purification type fresh air ventilator used in medical places, which is different from Example 1 in that Figure 6-Figure 8 As shown, the protective assembly 8 includes a first cone block 801, one side of the first cone block 801 is fixedly connected to the outer wall of the rectangular screw sleeve 707, a second cone block 802 is provided on the side of the first cone block 801 away from the rectangular screw sleeve 707, a fixed block 804 is fixedly connected to the center of the other side of the second cone block 802, the fixed block 804 extends to the outside of the connecting seat 703 and is provided with a protective frame 810, the fixed block 804 is slidably connected to the inside of the connecting seat 703, springs 803 are provided on both sides of the fixed block 804, and the two sides of the spring 803 are respectively fixedly connected to the second cone block 802 and the inner wall of the connecting seat 703, A vertical plate 805 is slidably connected to one side of the protective frame 810, and one side of the vertical plate 805 is fixedly connected to one side of the fixed block 804. A plurality of racks 806 are linearly distributed on the side of the vertical plate 805 away from the fixed block 804. A gear 807 is meshed and connected to the bottom side of the rack 806. A connecting shaft 808 is fixedly connected to the gear 807. The other end of the connecting shaft 808 extends to the outside of the protective frame 810 and is provided with a protective blade 809. The connecting shaft 808 is rotatably connected to the inside of the protective frame 810. The cross-sectional shape of the protective frame 810 is set to be rectangular, and a sealing layer is provided on the outer peripheral side of the protective blade 809.

[0024] In actual application, the rectangular screw sleeve 707 drives the first cone block 801 to move upward, and squeezes the second cone block 802, the spring 803, the fixed block 804 and the vertical plate 805, so that the vertical plate 805 drives the rack 806 to move, and utilizes the linkage effect between the rack 806 and the gear 807 to transmit power to the gear 807, so that the gear 807 drives the connecting shaft 808 and the protective blade 809 to rotate, so that the protective blade 809 protects the shell 1 to prevent dust from entering the interior of the processing unit 4 during the cleaning process, thereby preventing the processing effect of the processing unit 4 from being affected.

[0025] Example 3: A purification type fresh air ventilator used in medical places, which is different from Example 1 in that Figure 1-Figure 5 As shown, the auxiliary connection assembly 6 includes two arc blocks 601, the two arc blocks 601 are arranged on the outer peripheral side of the connecting pipe 5, and one side of the arc block 601 is fixedly connected to the outer wall of the shell 1, the arc block 601 is fixedly connected to the fixed frame 602 on the side away from the shell 1, and the inner side of the fixed frame 602 is rotatably connected to a rotating shaft, one end of the rotating shaft extends to the outside of the fixed frame 602 and is fixedly connected to a rotating handle 604, and the end of the rotating shaft away from the rotating handle 604 is fixedly connected to a first bevel gear 603, the first bevel gear 603 is arranged inside the fixed frame 602, and one side of the first bevel gear 603 is meshed with the first bevel gear 603. Two bevel gears 605, a fixed shaft is fixedly connected inside the second bevel gear 605, one end of the fixed shaft is rotatably connected to the inside of the fixed frame 602, and the other end of the fixed shaft is fixedly connected to a screw 606, a sliding block 607 is provided on the outer peripheral side of the screw 606 through the screw seat, the sliding block 607 is slidably connected to the inside of the fixed frame 602, one side of the two sliding blocks 607 extends to the outside of the fixed frame 602 and is fixedly connected to the same fixed seat 608, one side of the fixed seat 608 is fixedly connected to a telescopic tube 609, and the end of the telescopic tube 609 away from the fixed seat 608 is slidably sealed inside the connecting pipe 5.

[0026] In actual application, according to actual needs, the staff manually operates the turning handle 604 to drive the rotating shaft and the first bevel gear 603 to rotate, and utilizes the linkage effect between the first bevel gear 603 and the second bevel gear 605 to transmit power to the second bevel gear 605, so that the second bevel gear 605 drives the fixed shaft and the screw 606 to rotate, and then utilizes the linkage effect between the screw 606 and the screw seat to transmit power to the screw seat, so that the screw seat drives the sliding block 607, the fixed seat 608 and the telescopic tube 609 to move, and adjusts the use distance between the telescopic tube 609 and the connecting pipe 5, thereby reducing the impact of dimensional deviation of the product during on-site installation, speeding up the construction progress, making this product suitable for installation requirements in different situations, and thus effectively improving the applicability of the product. According to actual needs, a limit device is set on the outer peripheral side of the rotating shaft, and the limit device is fixedly connected to the outer wall of the fixed frame 602.

[0027] Working principle: first fix the shell 1 in a suitable position, then connect the two connecting pipes 5 away from the shell 1 at one end to the external medical supply channel respectively, and according to actual needs, the staff manually operates the turning handle 604 to drive the rotating shaft and the first bevel gear 603 to rotate, and utilizes the linkage effect between the first bevel gear 603 and the second bevel gear 605 to transmit power to the second bevel gear 605, so that the second bevel gear 605 drives the fixed shaft and the screw 606 to rotate, and then utilizes the linkage effect between the screw 606 and the screw seat to transmit power to the screw seat, so that the screw seat drives the sliding block 607, the fixed seat 608 and the telescopic tube 609 to move, and adjusts the use distance between the telescopic tube 609 and the connecting pipe 5; The filter 704 will filter the gas during the use of the exhaust unit 2 and the air inlet unit 3. When the filter 704 needs to be cleaned after a long period of use, the drive motor 705 is started according to actual needs, and the reciprocating screw 706 is driven by the drive motor 705 to rotate. The linkage effect between the reciprocating screw 706 and the rectangular screw sleeve 707 is utilized to transmit power to the rectangular screw sleeve 707, so that the rectangular screw sleeve 707 drives the connecting block 708 and the cleaning brush 709 to move, and the surface of the filter 704 is cleaned by the cleaning brush 709. In the process of the connecting block 708 moving upward, the air bag 710 on the bottom side is stretched, and the air bag 710 assists in extracting the cleaned dust through the air inlet pipe, the collection box 702 and the collection frame 701; At the same time, the rectangular screw sleeve 707 will drive the first cone block 801 to move upward, and squeeze the second cone block 802, the spring 803, the fixed block 804 and the vertical plate 805, so that the vertical plate 805 drives the rack 806 to move, and utilizes the linkage effect between the rack 806 and the gear 807 to transmit power to the gear 807, so that the gear 807 drives the connecting shaft 808 and the protective blade 809 to rotate, so that the protective blade 809 protects the shell 1, which is easy to use.

[0028] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A purification type fresh air ventilator used in medical places, characterized in that: The invention comprises a shell (1), wherein an exhaust unit (2) and an air inlet unit (3) are respectively provided on both sides of the shell (1), a processing unit (4) is provided between the exhaust unit (2) and the air inlet unit (3), a filtering and cleaning component (7) and a protective component (8) are respectively provided on both sides of the processing unit (4), a connecting pipe (5) is connected to both sides of the exhaust unit (2) and the air inlet unit (3), and an auxiliary connecting component (6) is provided on one side of the shell (1); The filtering and cleaning assembly (7) comprises a collecting frame (701) and two connecting seats (703), a filter screen (704) is provided between the two connecting seats (703), a reciprocating screw (706) is rotatably connected inside the connecting seat (703) on one side, a rectangular screw sleeve (707) is transmission-connected to the reciprocating screw (706), one side of the rectangular screw sleeve (707) is fixedly connected to a connecting block (708), and the other side of the connecting block (708) extends to the outside of the connecting seat (703) and is fixedly connected to a cleaning brush (709).

2. A purification-type fresh air ventilator for use in medical facilities according to claim 1, characterized in that: The reciprocating screw (706) is provided with bidirectional intersecting threads, the bottom end of the reciprocating screw (706) extends into the interior of the collection frame (701) and is fixedly connected to a drive motor (705), and the bottom of the drive motor (705) is fixedly connected to the inner wall of the collection frame (701).

3. A purification-type fresh air ventilator for use in medical facilities according to claim 2, characterized in that: The bottom of the collection frame (701) is fixedly connected to the inner wall of the shell (1), the bottom of the connection seat (703) is fixedly connected to the top of the collection frame (701), and a collection box (702) is provided inside the collection frame (701).

4. A purification-type fresh air ventilator for use in medical facilities according to claim 3, characterized in that: The rectangular screw sleeve (707) and the connecting block (708) are both slidably connected inside the connecting seat (703); the cross-sectional shape of the connecting block (708) is set to be L-shaped; air bags (710) are provided on both sides of the connecting block (708); the other side of the air bag (710) is fixedly connected to the inner wall of the connecting seat (703); the cleaning brush (709) is provided on the side relative to the filter (704); one side of the air bag (710) is connected to the collection box (702) through the air inlet pipe; one side of the air bag (710) is connected to the air outlet pipe, and a one-way valve is provided on the air outlet pipe and the air inlet pipe.

5. The purification-type fresh air ventilator used in medical places according to claim 4, characterized in that: The protective assembly (8) includes a first cone block (801), one side of the first cone block (801) is fixedly connected to the outer wall of the rectangular screw sleeve (707), a second cone block (802) is provided on the side of the first cone block (801) away from the rectangular screw sleeve (707), and a fixed block (804) is fixedly connected at the center of the other side of the second cone block (802), and the fixed block (804) extends to the outside of the connecting seat (703) and is provided with a protective frame (810).

6. The purification-type fresh air ventilator used in medical places according to claim 5, characterized in that: The fixed block (804) is slidably connected to the interior of the connecting seat (703), and springs (803) are provided on both sides of the fixed block (804). Both sides of the spring (803) are fixedly connected to the second cone block (802) and the inner wall of the connecting seat (703), respectively.

7. The purification-type fresh air ventilator used in medical places according to claim 6, characterized in that: A vertical plate (805) is slidably connected to one side of the interior of the protective frame (810), and one side of the vertical plate (805) is fixedly connected to one side of the fixed block (804). A plurality of racks (806) are linearly distributed on the side of the vertical plate (805) away from the fixed block (804). A gear (807) is meshedly connected to the bottom side of the rack (806). A connecting shaft (808) is fixedly connected to the interior of the gear (807). The other end of the connecting shaft (808) extends to the outside of the protective frame (810) and is provided with a protective blade (809). The connecting shaft (808) is rotatably connected to the interior of the protective frame (810). The cross-sectional shape of the protective frame (810) is set to be rectangular, and a sealing layer is provided on the outer peripheral side of the protective blade (809).

8. The purification-type fresh air ventilator used in medical places according to claim 7, characterized in that: The auxiliary connection assembly (6) comprises two arc blocks (601), the two arc blocks (601) being arranged on the outer peripheral side of the connection pipe (5), and one side of the arc blocks (601) being fixedly connected to the outer wall of the housing (1), the side of the arc blocks (601) away from the housing (1) being fixedly connected to a fixed frame (602), the inner side of the fixed frame (602) being rotatably connected to a rotating shaft, one end of the rotating shaft extending to the outside of the fixed frame (602) and being fixedly connected to a rotating handle (604), and the end of the rotating shaft away from the rotating handle (604) being fixedly connected to a first bevel gear (603).

9. The purification-type fresh air ventilator used in medical places according to claim 8, characterized in that: The first bevel gear (603) is arranged inside the fixed frame (602), and one side of the first bevel gear (603) is meshedly connected to the second bevel gear (605), and the second bevel gear (605) is fixedly connected to a fixed shaft inside, one end of the fixed shaft is rotatably connected to the inside of the fixed frame (602), and the other end of the fixed shaft is fixedly connected to a lead screw (606).

10. The purification-type fresh air ventilator used in medical places according to claim 9, characterized in that: A sliding block (607) is provided on the outer peripheral side of the lead screw (606) through the lead screw seat, and the sliding block (607) is slidably connected to the inside of the fixed frame (602). One side of the two sliding blocks (607) extends to the outside of the fixed frame (602) and is fixedly connected to the same fixed seat (608). One side of the fixed seat (608) is fixedly connected to a telescopic tube (609), and the end of the telescopic tube (609) away from the fixed seat (608) is slidably sealed inside the connecting pipe (5).

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