Fresh air purification assembly for clean operating room

Abstract

The utility model relates to a fresh air purification assembly, in particular to a fresh air purification assembly for a clean operating room, which is installed on a fresh air processing unit and comprises an air supply pipeline and an air return pipeline which are respectively installed on an air supply port and an air return port of the fresh air processing unit, and an air pipe control structure is arranged between the air supply pipeline and the air return pipeline. Linkage control of the positive pressure valve and the negative pressure valve is achieved, it is ensured that in the positive pressure and negative pressure switching process in an operating room, when one valve is closed, the other valve can be stably opened, meanwhile, the effect of delayed closing or opening is achieved, discomfort of personnel or equipment damage caused by too fast switching is effectively avoided, and the safety of the operating room is improved. The stability and the safety of operating room environment control are obviously improved; through cooperative work of the motor, the transmission part, the linkage part, the sliding mechanism and the driving gear, precise linkage of the positive pressure valve and the negative pressure valve is achieved, and discomfort of personnel or damage to equipment caused by too fast switching is avoided.

Description

Technical Field

[0001] This utility model relates to a fresh air purification component, specifically a fresh air purification component for a clean operating room. Background Technology

[0002] The main purpose of fresh air purification components for clean operating rooms is to provide purified fresh air to the operating room while expelling polluted air from the room, so as to maintain the air quality in the operating room to meet strict cleanliness standards. This component is very important in the medical environment because it can effectively reduce bacteria, viruses, dust and other pollutants in the operating room, thereby reducing the risk of surgical infection and ensuring the safety and success rate of the surgery.

[0003] In the fresh air purification components used in clean operating rooms, the main purpose of installing positive pressure valves and negative pressure valves on the supply air ducts and return air ducts is to precisely control the air pressure, flow rate, and air quality in the operating room, thereby ensuring that the environment in the operating room meets strict cleanliness standards. Depending on different surgical needs, clean operating rooms may need to achieve a positive pressure or negative pressure environment in the operating room. Therefore, it is necessary to adjust and control the positive pressure valves and negative pressure valves.

[0004] In the practical application of fresh air purification components in clean operating rooms, the operating states of positive pressure valves and negative pressure valves usually exhibit mutually exclusive characteristics. That is, when one valve is open, the other valve is closed. The core purpose of this design is to ensure that the operating room can effectively switch between positive and negative pressure to adapt to the special needs of different surgical scenarios. However, existing positive pressure valves and negative pressure valves are usually equipped with independent control devices. Although these devices can control the opening and closing states of their respective valves, this independent control method has exposed a series of technical problems in actual use.

[0005] Independent control devices have significant shortcomings in the switching coordination between positive and negative pressure valves. The switching process of the two valves is affected by the operating environment, making it difficult to achieve precise synchronization and coordination. This may lead to unstable pressure in the operating room, thereby affecting the quality and safety of the surgical environment. For example, during the switch from positive to negative pressure, if the negative pressure valve cannot open in time or the positive pressure valve cannot close in time, it may cause a brief pressure fluctuation in the operating room. This fluctuation may not only make the people in the operating room feel uncomfortable, but may also interfere with the ongoing surgical procedure. Utility Model Content

[0006] The purpose of this invention is to provide a fresh air purification component for clean operating rooms to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A fresh air purification component for a clean operating room, installed on a fresh air handling unit, includes a supply air duct and a return air duct respectively installed at the supply air outlet and return air outlet of the fresh air handling unit. A duct control structure is provided between the supply air duct and the return air duct, and the duct control structure includes:

[0009] Positive pressure valves and negative pressure valves are respectively installed on the supply air duct and the return air duct. The valve stems of the positive pressure valves and the negative pressure valves are respectively equipped with a first gear and a second gear. A motor is installed on the positive pressure valve, and a transmission component is provided on the output end of the motor.

[0010] A linkage component connected to the transmission component is rotatably installed between the positive pressure valve and the negative pressure valve. The linkage component is provided with a sliding mechanism that can slide along its length. A drive gear that meshes with the first gear and the second gear is installed on the sliding mechanism. When the motor is activated, the linkage component is activated through the transmission component, so that the sliding mechanism on the linkage component slides, thereby causing the drive gear to switch between meshing with the first gear and the second gear, controlling the opening and closing state of the positive pressure valve and the negative pressure valve.

[0011] A fresh air purification component for a clean operating room as described above: a first mounting seat is provided on the positive pressure valve at the valve stem position.

[0012] A fresh air purification component for a clean operating room as described above: a second mounting base is provided on the negative pressure valve at the valve stem position.

[0013] A fresh air purification component for a clean operating room as described above: the transmission component includes a third gear fixed on the output shaft of the motor, a fourth gear rotatably mounted on the first mounting base, and a chain that drives the third gear and the fourth gear;

[0014] The chain is used to transmit the power of the motor, and the arrangement of the chain does not hinder the rotation of the valve stem of the positive pressure valve.

[0015] A fresh air purification component for a clean operating room as described above: the linkage includes a transmission rod that rotates between the first mounting base and the second mounting base, a fifth gear fixed to the top of the transmission rod, a sixth gear meshing with the fifth gear, and a screw fixed to the sixth gear and rotating between the first mounting base and the second mounting base;

[0016] The transmission rod has an anti-rotation groove along its length.

[0017] A fresh air purification component for a clean operating room as described above: the sliding mechanism includes a threaded sleeve threadedly connected to the screw and abutment plates fixed on the upper and lower sides of the threaded sleeve;

[0018] One end of the contact plate is slidably sleeved with the screw, and the other end is slidably sleeved with the transmission rod.

[0019] A fresh air purification component for a clean operating room as described above: the drive gear is slidably sleeved on the transmission rod, and the inner wall of the drive gear is provided with an anti-rotation protrusion in conjunction with the anti-rotation groove.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This solution enables the coordinated control of positive and negative pressure valves, ensuring that when one valve closes during the switching between positive and negative pressure in the operating room, the other valve can open smoothly. It also has the effect of delayed closing or opening, effectively avoiding discomfort to personnel or damage to equipment caused by too rapid switching, and significantly improving the stability and safety of the operating room environment control.

[0022] Through the coordinated operation of the motor, transmission components, linkage components, sliding mechanism, and drive gear, precise linkage between positive and negative pressure valves is achieved. The power of the motor is transmitted to the linkage components through the transmission components, driving the sliding mechanism to slide along the linkage components, which in turn drives the drive gear to switch between the positive and negative pressure valves. This design not only ensures that the opening and closing state of the valves can be precisely switched according to the needs of the operating room, but also naturally achieves a delay effect through the stroke design of the sliding mechanism, avoiding problems caused by excessively rapid switching between positive and negative pressure, and preventing personnel discomfort or equipment damage caused by excessively rapid switching, thus significantly improving the stability and safety of the operating room environment control. Attached Figure Description

[0023] Figure 1 A schematic diagram of a fresh air purification component for a clean operating room.

[0024] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0025] Figure 3 A schematic diagram of the air supply duct in a fresh air purification system for clean operating rooms.

[0026] Figure 4 A schematic diagram of the return air duct in a fresh air purification system for a clean operating room.

[0027] Figure 5 A schematic diagram of the transmission and linkage components in a fresh air purification system for clean operating rooms.

[0028] Figure 6 In order to be in Figure 5 The diagram shows the structure after disassembling the transmission rod, threaded sleeve, and drive gear.

[0029] In the diagram: 1. Supply air duct; 2. Return air duct; 3. Positive pressure valve; 4. Negative pressure valve; 5. First mounting base; 6. First gear; 7. Second mounting base; 8. Second gear; 9. Motor; 10. Third gear; 11. Fourth gear; 12. Chain; 13. Transmission rod; 14. Fifth gear; 15. Sixth gear; 16. Screw; 17. Threaded sleeve; 18. Contact plate; 19. Drive gear; 20. Buffer spring; 21. Valve stem; 22. Valve plate; 23. Stop. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] Please see Figures 1-6 In this embodiment of the present invention, a fresh air purification component for a clean operating room is installed on a fresh air handling unit, including a supply air duct 1 and a return air duct 2 respectively installed on the supply air outlet and return air outlet of the fresh air handling unit. A duct control structure is provided between the supply air duct 1 and the return air duct 2, and the duct control structure includes:

[0032] Positive pressure valve 3 and negative pressure valve 4 are respectively installed on the air supply duct 1 and the return air duct 2. The valve stem 21 of the positive pressure valve 3 and the negative pressure valve 4 is respectively provided with a first gear 6 and a second gear 8. A valve plate 22 is fixedly installed on the valve stem 21. A motor 9 is installed on the positive pressure valve 3. A transmission component is provided on the output end of the motor 9.

[0033] A linkage component connected to the transmission component is rotatably installed between the positive pressure valve 3 and the negative pressure valve 4. The linkage component is provided with a sliding mechanism that can slide along its length. A drive gear 19 that meshes with the first gear 6 or the second gear 8 is installed on the sliding mechanism. When the motor 9 is activated, the linkage component is activated through the transmission component, so that the sliding mechanism on the linkage component slides, thereby causing the drive gear 19 to switch between the first gear 6 and the second gear 8, controlling the opening and closing state of the positive pressure valve 3 and the negative pressure valve 4.

[0034] It should be noted that, in order to ensure that the drive gear 19 can smoothly align and engage with the first gear 6 or the second gear 8, this application provides a buffer spring 20 on each side of the drive gear 19. When the drive gear 19 moves to the first gear 6 or the second gear 8 and a tooth-to-tooth collision occurs, preventing meshing, the buffer spring 20 acts as a buffer, and the drive gear 19 temporarily stops moving while continuing to rotate until the drive gear 19 can smoothly mesh with the first gear 6 or the second gear 8.

[0035] In this embodiment, when the motor 9 starts, it transmits power to the linkage through the transmission component, thereby driving the sliding mechanism on the linkage to slide along the length of the linkage. It can change the sliding direction according to the different rotation directions of the motor 9, thereby realizing the opening and closing switching of the positive pressure valve 3 and the negative pressure valve 4.

[0036] During the sliding process, the sliding mechanism can drive the drive gear 19 to slide synchronously because it is rotatably mounted with the drive gear 19. The linkage is set between the positive pressure valve 3 and the negative pressure valve 4. The drive gear 19 meshes with the first gear 6 and the second gear 8 fixedly mounted on the positive pressure valve 3 and the negative pressure valve 4, respectively. This design allows the drive gear 19 to rotate on the linkage during the sliding process, and when it meshes with the first gear 6 or the second gear 8, it can drive the corresponding gear to rotate synchronously.

[0037] Specifically, when the drive gear 19 meshes with the first gear 6, it drives the first gear 6 to rotate. At this time, the drive gear 19 will slide on the linkage under the drive of the sliding mechanism. According to the design, when the drive gear 19 disengages from the first gear 6 due to sliding, the positive pressure valve 3 will be in the closed state. At this time, the drive gear 19 continues to slide on the linkage and moves towards the second gear 8.

[0038] The drive gear 19 moves to the position of the second gear 8 and meshes with it, thereby driving the second gear 8 to rotate. This action causes the negative pressure valve 4 to open, thereby realizing the positive and negative pressure switching operation in the operating room. This design not only ensures the precise control of the pressure state in the operating room, but also achieves a smooth transition during the positive and negative pressure switching process through the stroke design of the sliding mechanism, ensuring the stability and safety of the operating room environment.

[0039] Please see Figure 4 As a further embodiment of this utility model, a first mounting seat 5 is provided on the positive pressure valve 3 at the valve stem 21.

[0040] In this embodiment, the main function of the first mounting base 5 is to provide stable support and precise installation position for the motor 9, transmission components and linkage components, thereby ensuring that the entire fresh air purification assembly can operate efficiently and stably, meeting the strict requirements of the operating room for air quality control.

[0041] Please see Figure 3 As a further embodiment of this utility model, a second mounting seat 7 is provided on the negative pressure valve 4 at the valve stem 21.

[0042] In this embodiment, the second mounting seat 7 provided on the negative pressure valve 4 mainly functions to provide a stable support for the linkage component and meet the installation and use requirements of the linkage component.

[0043] Please see Figure 5 and Figure 6 As a further embodiment of this utility model, the transmission component includes a third gear 10 fixed on the output shaft of the motor 9, a fourth gear 11 rotatably mounted on the first mounting base 5, and a chain 12 that drives the third gear 10 and the fourth gear 11.

[0044] The chain 12 is used to transmit power to the motor 9, and the arrangement of the chain 12 does not hinder the rotation of the valve stem 21 of the positive pressure valve 3.

[0045] Please see Figure 5 and Figure 6 As a further embodiment of this utility model, the linkage includes a transmission rod 13 that rotates between the first mounting base 5 and the second mounting base 7, a fifth gear 14 fixed to the top of the transmission rod 13, a sixth gear 15 that meshes with the fifth gear 14, and a screw 16 fixed to the sixth gear 15 and rotating between the first mounting base 5 and the second mounting base 7.

[0046] The transmission rod 13 has an anti-rotation groove along its length. The drive gear 19 is fitted onto the transmission rod 13, and its inner surface has an anti-rotation protrusion that engages with the anti-rotation groove. The drive gear 19 can move up and down relative to the transmission rod 13 along the anti-rotation groove, and can also rotate synchronously with the transmission rod 13.

[0047] In this embodiment, when the motor 9 starts and generates power, since the transmission rod 13 is fixedly connected to the fourth gear 11, the fourth gear 11 can directly transmit the force of the motor 9 to the transmission rod 13, thereby driving the transmission rod 13 to rotate. The transmission rod 13 and the screw 16 are meshed and transmitted through the fifth gear 14 and the sixth gear 15. This gear transmission design enables the rotation of the transmission rod 13 to be effectively transmitted to the screw 16, thereby achieving synchronous rotation of the screw 16. This transmission method not only ensures the high efficiency and accuracy of power transmission, but also enables the fresh air purification component for clean operating rooms to achieve precise control of the positive pressure valve 3 and the negative pressure valve 4.

[0048] As a further embodiment of the present invention, the sliding mechanism includes a threaded sleeve 17 threadedly connected to the screw 16 and abutment plates 18 fixed on the upper and lower sides of the threaded sleeve 17.

[0049] One end of the contact plate 18 is slidably sleeved with the screw 16, and the other end is slidably sleeved with the transmission rod 13.

[0050] One end of the buffer spring 20 abuts against the side wall of the drive gear 19, and the other end abuts against the abutment plate 18 on one side.

[0051] In this embodiment, the threaded sleeve 17 is threadedly connected to the screw 16. This connection allows the threaded sleeve 17 to slide along the axial direction of the screw 16 when it rotates. At the same time, the threaded sleeve 17 is provided with abutment plates 18 on both sides. These abutment plates 18 are slidably sleeved on the transmission rod 13. This design ensures that when the screw 16 rotates, the abutment plates 18 will not rotate with the screw 16, but will slide and adjust along the axial direction of the screw 16.

[0052] The drive gear 19 meshes with the first gear 6 and the second gear 8. This meshing relationship enables the drive gear 19 to drive the first gear 6 and the second gear 8 to rotate. When the drive gear 19 slides on the transmission rod 13 and meshes with the first gear 6, it can drive the first gear 6 to rotate, thereby controlling the opening and closing state of the positive pressure valve 3. Similarly, when the drive gear 19 slides to mesh with the second gear 8, it can drive the second gear 8 to rotate, thereby controlling the opening and closing state of the negative pressure valve 4.

[0053] This design not only achieves precise control of the positive pressure valve 3 and the negative pressure valve 4, but also ensures the flexibility and reliability of the entire system through the sliding adjustment function of the threaded sleeve 17 and the contact plate 18. By rotating the screw 16, the threaded sleeve 17 can slide along its axial direction, thereby driving the drive gear 19 to slide on the transmission rod 13, realizing the opening and closing control of the positive pressure valve 3 and the negative pressure valve 4. The drive gear 19, the first gear 6, and the second gear 8 are all provided with beveled openings on both sides, which facilitates the meshing of the drive gear 19 with the first gear 6 and the second gear 8 when rotating.

[0054] It should be noted that, as Figure 5 As shown, through precise design of each component, when the drive gear 19 moves upward to the top, the negative pressure valve 4 is fully opened; as the drive gear 19 gradually moves downward, the negative pressure valve 4 is gradually closed until the drive gear 19 completely disengages from the second gear 8, at which point the negative pressure valve 4 is completely closed. When the drive gear 19 continues to move downward until it meshes with the first gear 6, the positive pressure valve 3 begins to gradually open; when the drive gear 19 moves to the bottom, the positive pressure valve 3 is fully opened.

[0055] To compensate for design precision errors, a stop 23 is integrally formed on the inner wall of the positive pressure valve 3 and the negative pressure valve 4 to limit the over-deflection of the valve plate 22. Furthermore, the motor 9 in this application is a stepper motor, which controls the step angle via pulse signals to achieve precise position control. When the valve plate 22 is blocked by the stop 23 and cannot rotate, that is, the valve stem 21 cannot rotate, corresponding to the first gear 6 or the second gear 8 not rotating. The current of the stepper motor will increase. By detecting changes in current or speed, it can be determined whether the stepper motor encounters resistance. Once resistance is detected, the control system will issue a stop signal to stop the stepper motor from working. Simultaneously, a buffer spring 20 can be used to prevent the drive gear 19 from exerting excessive pressure on the first mounting base 5 and the second mounting base 7, thus avoiding damage.

[0056] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.

Claims

1. A fresh air purification component for a clean operating room, installed on a fresh air handling unit, comprising a supply air duct (1) and a return air duct (2) respectively installed on the supply air outlet and return air outlet of the fresh air handling unit, characterized in that, A duct control structure is provided between the supply air duct (1) and the return air duct (2), and the duct control structure includes: Positive pressure valve (3) and negative pressure valve (4) are respectively installed on the air supply duct (1) and the return air duct (2). The valve stem (21) of the positive pressure valve (3) and the negative pressure valve (4) are respectively provided with a first gear (6) and a second gear (8). A motor (9) is installed on the positive pressure valve (3). A transmission component is provided on the output end of the motor (9). A linkage component connected to the transmission component is rotatably installed between the positive pressure valve (3) and the negative pressure valve (4). The linkage component is provided with a sliding mechanism that can slide along its length. A drive gear (19) that meshes with the first gear (6) and the second gear (8) is installed on the sliding mechanism. When the motor (9) is activated, the linkage component is activated through the transmission component, so that the sliding mechanism on the linkage component slides, thereby causing the drive gear (19) to switch between the first gear (6) and the second gear (8) to control the opening and closing states of the positive pressure valve (3) and the negative pressure valve (4).

2. The fresh air purification component for a clean operating room according to claim 1, characterized in that, The positive pressure valve (3) is provided with a first mounting seat (5) at the valve stem (21).

3. The fresh air purification component for a clean operating room according to claim 1, characterized in that, The negative pressure valve (4) is provided with a second mounting seat (7) at the valve stem (21).

4. A fresh air purification component for a clean operating room according to claim 2, characterized in that, The transmission component includes a third gear (10) fixed on the output shaft of the motor (9), a fourth gear (11) rotatably mounted on the first mounting base (5), and a chain (12) that drives the third gear (10) and the fourth gear (11). The chain (12) is used to transmit the power of the motor (9), and the arrangement of the chain (12) does not hinder the rotation of the valve stem (21) of the positive pressure valve (3).

5. A fresh air purification component for a clean operating room according to claim 4, characterized in that, The linkage includes a transmission rod (13) that rotates between the first mounting base (5) and the second mounting base (7), a fifth gear (14) fixed to the top of the transmission rod (13), a sixth gear (15) that meshes with the fifth gear (14), and a screw (16) fixed to the sixth gear (15) and rotating between the first mounting base (5) and the second mounting base (7). The transmission rod (13) has an anti-rotation groove along its length.

6. A fresh air purification component for a clean operating room according to claim 5, characterized in that, The sliding mechanism includes a threaded sleeve (17) threadedly connected to the screw (16) and abutment plates (18) fixed on the upper and lower sides of the threaded sleeve (17). A buffer spring (20) is provided between the abutment plate (18) and the drive gear (19). One end of the contact plate (18) is slidably sleeved with the screw (16), and the other end is slidably sleeved with the transmission rod (13).

7. A fresh air purification component for a clean operating room according to claim 5, characterized in that, The drive gear (19) is slidably sleeved on the transmission rod (13), and the inner wall of the drive gear (19) is provided with an anti-rotation protrusion in conjunction with the anti-rotation groove.

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