Air filter for ventilation device of operating room

Abstract

The invention relates to the technical field of ventilation, in particular to an air filter for an operating room ventilation device, which comprises a shell and a filter element, the filter element is arranged in the shell, and anti-overflow mechanisms are respectively arranged on two sides of the filter element and are used for covering attachments on the surface of the filter element. According to the device, the anti-overflow mechanism is used for covering the surface of the filter element or the surface of attachments such as dust and microorganism particles in the filter element, so that when the efficient filter is disassembled, the attachments on the filter element can be effectively prevented from falling off, the air pollution risk caused by filter replacement is reduced, the cleanliness of an operating room is protected, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilation, and more specifically, to an air filter for an operating room ventilation device. Background Art

[0002] The operating room is a critical area in a hospital for performing surgical operations. Its environmental quality is directly related to the safety of patients and the success rate of surgeries. During the operation, it is crucial to maintain the cleanliness of the air in the operating room because any minor contamination may lead to postoperative infections in patients. Currently, laminar flow purification systems are used in operating rooms for environmental control, and strict control is carried out on microbial contamination through air purification technology to provide a sterile, constant-temperature, and constant-humidity environment for surgeries.

[0003] Generally, a laminar flow purification system includes a circulating air handling unit, a supply air duct, a fresh air handling unit, an operating room air filter, an air inlet, an air outlet, etc. During the operation, the fresh air handling unit sends fresh air into the circulating air handling unit. In the circulating air handling unit, the air will be initially filtered, dehumidified, heated, and humidified in sequence to adjust the air to the temperature and humidity required for the operating room. Subsequently, the circulating air handling unit will equalize the air flow, then perform medium-efficiency and sub-high-efficiency filtration, and then sterilization. Subsequently, the circulating air handling unit will send the air into the air filter at the top of the operating room through the supply air duct for filtration. The filtered air is discharged from the air inlet at the top of the operating room above the hospital bed. The air flow in the operating room flows downward in a unidirectional laminar flow mode. At this time, the air outlets around the operating room will collect the discharged air and then transport the discharged air back into the circulating air fan unit to be mixed with the fresh air to achieve circular operation.

[0004] To ensure the normal use of the air filter in the operating room and avoid contamination in the operating room, after a certain period of time, the staff will remove and replace the high-efficiency filter in the operating room air filter to ensure the stable operation of the laminar flow purification system.

[0005] When replacing the high-efficiency filter in the existing operating room ventilation device, during the process of opening the ceiling and removing the high-efficiency filter, due to the shaking and air flow generated during the process of screwing the screws, the dust, microbial particles, and other attachments on the surface or inside of the filter will fall off and spread into the operating room with the air flow, causing contamination in the operating room. This will result in additional cleaning operations in the operating room by the staff, increasing the labor intensity and maintenance cost. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an air filter for an operating room ventilation device, which can effectively avoid the shedding of attachments such as dust, microbial particles, etc. on the surface or inside when removing and replacing the air filter.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: An air filter for an operating room ventilation device, comprising a housing and a filter element. The filter element is placed inside the housing, and anti-overflow mechanisms are respectively arranged on both sides of the filter element. The anti-overflow mechanisms are used to cover the attachments on the surface of the filter element.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: By arranging anti-overflow mechanisms on the surface of the filter element, and using the anti-overflow mechanisms to cover the surface of attachments such as dust and microbial particles on the surface or inside of the filter element, when the high-efficiency filter is disassembled, the attachments on the filter element can be effectively prevented from falling off, reducing the risk of air pollution caused by replacing the filter, protecting the cleanliness of the operating room, and reducing the maintenance cost.

[0009] As a preference, a further technical solution of the present invention is as follows: Preferably, the anti-overflow mechanism includes a winding roller and a lead screw. The winding roller and the lead screw are respectively placed on both sides of the housing and are respectively rotationally connected to the housing. A shielding film is arranged on the winding roller; a moving block is threadedly connected to the lead screw, the shielding film is connected to the moving block, and one end of the lead screw is connected to a driving mechanism.

[0010] Preferably, a smooth section is arranged in the middle of the lead screw, and the thread sections on both sides of the smooth section are arranged in the opposite direction.

[0011] Preferably, a moving block is arranged on the lead screw corresponding to each of the two thread sections thereof. A connecting rod is arranged on the outer side of the shielding film, and both ends of the connecting rod are respectively connected to the corresponding moving block through a pull rope.

[0012] Preferably, the housing is provided with guide wheels for cooperating with the pull ropes at both ends corresponding to the pull ropes on the side close to the lead screw.

[0013] Preferably, the driving mechanism includes a driving shaft, a driving gear and a driven gear. One end of the driving shaft penetrates through the housing and is rotationally connected to the housing. The driving gear is installed at one end of the driving shaft inside the housing, the driven gear is installed at one end of the lead screw, and the driven gear meshes with the driving gear; the other end of the driving shaft is placed outside the housing, and a knob is arranged at the end of this end.

[0014] Preferably, torsion springs are respectively arranged at both ends of the winding roller. The inner ring end of the torsion spring is fixedly connected to the winding roller, and the outer ring end of the torsion spring is fixedly connected to the housing.

[0015] Preferably, a guide rod penetrating through the two moving blocks is arranged inside the housing on the side close to the lead screw, and the moving block is slidably connected to the guide rod.

[0016] Preferably, it further includes a sealing frame slidably connected to the housing. Two support rods are provided at one end of the sealing frame close to the lead screw, and the housing and the support rods are connected by a return spring; a pressure-receiving ball is provided at the end of the support rod away from the frame; a pressing block cooperating with the pressure-receiving ball is respectively provided on each moving block, and the surface of the pressing block close to the pressure-receiving ball is inclined. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural view of the surgical ventilation device of the present invention Figure 2 is a schematic structural view of the present invention; Figure 3 is a schematic three-dimensional split structural view of the whole of the present invention; Figure 4 is a schematic three-dimensional sectional view of the whole structure of the present invention; Figure 5 is a schematic three-dimensional structure view of the anti-overflow mechanism in the present invention; Figure 6 is a schematic structural view of the moving block, the pulling rope and the guide wheel on the lead screw in the present invention; Figure 7 is a schematic structural view of the contact between the pressing block and the pressure-receiving ball in the present invention; Figure 8 is a schematic three-dimensional structure view of the shielding film, the coil spring, the moving block and the lead screw in the present invention; Figure 9 is a schematic structural view of the driving mechanism in the present invention; Figure 10 is a schematic structural view of the moving block in the present invention; Figure 11 is a schematic structural view of the support rod in the present invention; Description of the reference numerals: 1, fresh air treatment unit; 2, circulating air treatment unit; 3, air filter; 31, housing; 32, filter element; 33, shielding film; 34, winding roller; 35, pulling rope; 36, lead screw; 3601, smooth section; 3602, threaded section; 37, moving block; 3701, pressing block; 38, installation groove; 39, connecting rod; 310, guide wheel; 311, driving shaft; 312, driving bevel gear; 313, driven bevel gear; 314, knob; 315, guide rod; 316, sealing frame; 317, sliding groove; 318, support rod; 319, connecting block; 320, pressure-receiving ball; 321, return spring; 322, coil spring. DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention will be further described below in conjunction with specific embodiments, and the purpose is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0019] As Figures 1 to 11As shown in the figure, an air filter for an operating room ventilation device is used in the operating room ventilation device. The operating room ventilation device consists of a fresh air treatment unit 1, a recirculated air treatment unit 2, and an air filter 3. The air outlet of the fresh air treatment unit 1 is connected to the air inlet of the recirculated air treatment unit 2 through a supply air duct. The air outlet of the recirculated air treatment unit 2 is connected to the air inlet at the top of the operating room through a supply air duct. The air return opening at the bottom of the operating room is connected to the air inlet of the recirculated air treatment unit 2 through a supply air duct, and the air filter 3 is arranged in the air inlet at the top of the operating room.

[0020] The air filter 3 is composed of a housing 31 and a filter element 32. The filter element 32 is placed in the center of the housing 31. Anti-overflow mechanisms are respectively arranged on the upper and lower sides of the filter element 32, and the anti-overflow mechanisms are used to cover the attachments on the surface of the filter element 32.

[0021] Each anti-overflow mechanism is respectively composed of a winding roller 34, a lead screw 36, and a sealing frame 316. The winding roller 34 is placed at the front end of the housing 31, the lead screw 36 is placed at the rear end of the housing 31, and installation grooves 38 for installing the winding roller 34 and the lead screw 36 are respectively opened at the front and rear ends on the upper and lower sides of the housing 31. The winding roller 34 and the lead screw 36 are respectively rotatably connected to the inner walls of their corresponding installation grooves 38.

[0022] Each lead screw 36 is composed of a smooth section 3601 and threaded sections 3602 arranged on the left and right sides of the smooth section 3601. The diameter of the smooth section 3601 is larger than the diameters of the threaded sections 3602 on both sides, and the threads of the threaded sections 3602 at both ends are arranged in opposite directions. A moving block 37 is arranged corresponding to each threaded section 3602 on the lead screw 36, and each moving block 37 is respectively threadedly connected to its corresponding threaded section 3602, and the moving block 37 moves up and down along the threaded section 3602.

[0023] Coil springs 322 are respectively arranged at the left and right ends of the winding roller 34. The inner ring end of the coil spring 322 is fixedly connected to the winding roller 34, and the outer ring end of the coil spring 322 is fixedly connected to the housing 31.

[0024] A shielding film 33 is wound around the winding roller 34. The inner side end of the shielding film 33 is fixedly connected to the winding roller 34, and the outer side end of the shielding film 33 is fixedly connected to a connecting rod 39. The left and right ends of the connecting rod 39 are respectively connected to the moving blocks 37 at their corresponding ends through pull ropes 35.

[0025] Guide wheels 310 cooperating with the pull ropes 35 are respectively arranged at the left and right ends corresponding to each lead screw 36 at the rear side of the housing 31, and the guide wheels 310 play a guiding and supporting role for the pull ropes 35 at both ends of the housing 31.

[0026] A driving mechanism is respectively arranged at the end of each lead screw 36. The driving mechanism is composed of a driving shaft 311, a driving gear and a driven gear. One end of the driving shaft 311 penetrates through the housing 31 and extends into the installation groove 38, and the driving shaft 311 is rotatably connected inside the housing 31; a driving gear is installed at its extended end, a driven gear is installed at the end of the lead screw 36, and the driven gear meshes with the driving gear; the other end of the driving shaft 311 is placed outside the housing 31, and a knob 314 is fixedly connected to this end. The knob 314 in this embodiment is a regular hexagon. When the driving shaft 311 is rotated, the rotating shaft can be driven to rotate through the cooperation of the electric drill and the knob 314. The rotating shaft drives the lead screw 36 to rotate through gear transmission, and the rotation of the lead screw 36 causes the moving block 37 thereon to move along the lead screw 36.

[0027] In this embodiment, both the driving gear and the driven gear are bevel gears.

[0028] In this embodiment, a guide rod 315 is arranged inside each installation groove 38 where the lead screw 36 is installed. Both ends of the guide rod 315 are fixedly connected to the left and right sides of the housing 31 respectively. The guide rod 315 penetrates through the two moving blocks 37 and is slidably connected to the two moving blocks 37.

[0029] Sealing frames 316 are respectively arranged on the upper and lower sides of the housing 31. Each side of the housing 31 is provided with a sliding groove 317 at its left and right ends respectively. The sliding groove 317 communicates with the installation groove 38 on its corresponding side; the sealing frame 316 is placed in the sliding groove 317 and is slidably connected to the sliding groove 317, and each sealing frame 316 is respectively placed outside the shielding film 33 on its corresponding side for pressing the shielding film 33. Specifically, two support rods 318 are arranged at one end of each sealing frame 316 close to the lead screw 36. Connection blocks 319 are respectively arranged at the positions of the housing 31 corresponding to the two support rods 318. A moving through groove for cooperating with the support rod 318 is opened on the connection block 319, and the support rod 318 is placed in the moving through groove and slides along the inner wall of the moving through groove.

[0030] When the pressure - receiving ball 320 is not in contact with the pressing block 3701, the sealing frame 316 is placed at the outermost side of the sliding groove 317, and the distance between the inner side of the sealing frame 316 and the surface of the filter element 32 allows the connecting rod 39 to pass through.

[0031] The two support rods 318 are placed in the middle of the sealing frame 316 and on both sides of the smooth section 3601 of the lead screw 36; each support rod 318 is an L - shaped structure. One end of the support rod 318 is fixedly connected to the sealing frame 316, and a pressure - receiving ball 320 is arranged at the other end of the support rod 318; a pressing block 3701 for cooperating with the pressure - receiving ball 320 is respectively arranged on the inner side of each moving block 37. The surface of the pressing block 3701 on the side close to the pressure - receiving ball 320 is inclined from one end close to the smooth section 3601 of the lead screw 36 towards the middle thereof.

[0032] During normal use, fresh air is sent into the recirculated air handling unit 2 by the fresh air handling unit 1. Inside the recirculated air handling unit 2, the air will be filtered, dehumidified, heated, humidified, equalized in flow, medium efficiency filtered, sub-high efficiency filtered and sterilized in sequence. Subsequently, the recirculated air handling unit 2 will send the air into the air filter 3 at the top of the operating room through the air supply duct. After being highly filtered by the air filter 3, it is then discharged from the air inlet at the top of the operating room above the hospital bed. The air flow in the operating room flows downward in a unidirectional laminar flow mode. At this time, the air return openings around the operating room will collect the air and then transport it back into the recirculated air handling unit 2.

[0033] When it is necessary to replace the housing 31 and the filter element 32, the staff uses a electric drill to hold the knob 314, and then starts the electric drill to drive the knob 314 to rotate, thereby driving the drive shaft 311 to rotate. The drive shaft 311 drives the lead screw 36 to rotate through a gear transmission. The rotation of the lead screw 36 drives the two moving blocks 37 thereon to move towards the middle of the lead screw 36. During the movement of the moving blocks 37, the connecting rod 39 is pulled along the surface of the filter element 32 through the pull rope 35, so as to unfold the shielding film 33. Until the two moving blocks 37 move close to the smooth section 3601 in the middle of the lead screw 36, the inclined surface of the pressing block 3701 contacts and gradually presses the pressed ball 320. The pressed ball 320 drives the support rod 318 to slide along the moving through groove. Until the two moving blocks 37 both abut against the smooth section 3601 in the middle of the lead screw 36, the flat surface of the pressing block 3701 contacts the pressed ball 320. At this time, the sealing frame 316 closely adheres to the shielding film 33, fixing the shielding film 33 on the surface of the housing 31. Shield the other side of the filter element 32 according to the above operation. Then the construction worker removes the bolts fixing the housing 31 and removes the entire air filter 3.

[0034] The present invention uses a shielding film to cover the upper and lower surfaces of the filter element, and pressurizes the shielding film through a sealing frame, so as to effectively avoid the attachments on the filter element from falling into the operating room when the air filter is removed, reduce the risk of air pollution caused by filter replacement, and protect the cleanliness of the operating room.

[0035] The above are only the preferred embodiments of the present invention that can be implemented, and do not limit the scope of rights of the present invention accordingly. Any equivalent changes made by using the content of the specification and drawings of the present invention are included within the scope of rights of the present invention.

Claims

1. An air filter for an operating room ventilation device, comprising a housing and a filter element, characterized in that: The filter element is placed inside the housing. Anti-overflow mechanisms are respectively arranged on both sides of the filter element, and the anti-overflow mechanisms are used to cover the attachments on the surface of the filter element.

2. The air filter for the operating room ventilation device according to claim 1, wherein: The anti-overflow mechanism includes a winding roller and a lead screw. The winding roller and the lead screw are respectively placed on both sides of the housing and are respectively rotationally connected to the housing. A shielding film is arranged on the winding roller; a moving block is threadedly connected to the lead screw, the shielding film is connected to the moving block, and one end of the lead screw is connected to a driving mechanism.

3. The air filter for the operating room ventilation device according to claim 2, characterized in that: A smooth section is arranged in the middle of the lead screw, and the thread sections on both sides of the smooth section are arranged in opposite directions.

4. The air filter for the operating room ventilation device according to claim 3, characterized in that: One moving block is arranged on the lead screw corresponding to each of the two thread sections thereon. A connecting rod is arranged on the outer side of the shielding film, and both ends of the connecting rod are respectively connected to the moving blocks at the corresponding ends through pull ropes.

5. The air filter for the operating room ventilation device according to claim 4, characterized in that: The housing is provided with guide wheels for cooperating with the pull ropes at both ends corresponding to the pull ropes on one side close to the lead screw.

6. The air filter for an operating room ventilation device according to claim 3, characterized in that: The driving mechanism includes a driving shaft, a driving gear and a driven gear. One end of the driving shaft penetrates through the housing and is rotationally connected to the housing. The driving gear is installed at one end of the driving shaft inside the housing, the driven gear is installed at one end of the lead screw, and the driven gear meshes with the driving gear; the other end of the driving shaft is placed outside the housing, and a knob is arranged at the end of this end.

7. The air filter for the operating room ventilation device according to claim 3, characterized in that: Torsion springs are respectively arranged at both ends of the winding roller. The inner ring end of the torsion spring is fixedly connected to the winding roller, and the outer ring end of the torsion spring is fixedly connected to the housing.

8. The air filter for the operating room ventilation device according to claim 3, characterized in that: A guide rod penetrating through the two moving blocks is arranged on one side close to the lead screw inside the housing, and the moving block is slidably connected to the guide rod.

9. The air filter for an operating room ventilation device according to claim 3, characterized in that: It further includes a sealing frame slidably connected to the housing. Two support rods are arranged at one end of the sealing frame close to the lead screw, and the housing and the support rods are connected through a return spring; a pressure-receiving ball is arranged at the end of the support rod away from the frame; a pressing block cooperating with the pressure-receiving ball is respectively arranged on each moving block, and the surface of the pressing block close to the pressure-receiving ball is inclined.

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