Automatic door opening device of sterilizer sealing door and sterilizer

Abstract

The application provides an automatic door opening device for a sterilizer sealing door, comprising a mounting seat and a positioning seat, a driving cylinder is arranged on the mounting seat, the cylinder barrel of the driving cylinder is rotationally connected with the mounting seat, a driving rod is rotationally arranged on the positioning seat in the vertical direction, the output shaft of the driving cylinder is transmissionally connected with the driving rod, an electromagnetic valve is arranged on the mounting seat, the electromagnetic valve is connected with the driving cylinder to control the opening and closing of the driving cylinder, a first limiting piece is arranged on the positioning seat, the first limiting piece is electrically connected with the electromagnetic valve, and the first limiting piece is used for limiting the contraction distance of the output shaft of the driving cylinder; the application also provides a sterilizer, comprising a box door, a box body and the automatic door opening device as described above, the application can realize the automatic opening and closing of the sterilizer, reduces or avoids the use of manual operation when the sterilizer is opened and closed, improves the safety protection of the workers, and improves the smoothness and reliability of the opening and closing of the sterilizer.

Description

Technical Field

[0001] This application relates to the field of disinfection and sterilization equipment technology, and more specifically, to an automatic door opening device for a sterilizer's sealing door and a sterilizer. Background Technology

[0002] The content in this section only provides background information related to this invention and may not constitute prior art.

[0003] A sterilizer is a device that can kill or remove all microorganisms on a transmission medium, including bacterial spores and non-pathogenic microorganisms. It typically includes three types: moist heat sterilization, dry heat sterilization, and chemical sterilization. In the medical field, steam sterilizers are widely used. Steam sterilizers belong to the category of moist heat sterilization equipment and usually consist of a sterilization chamber, a control system, and an overpressure protection device. They utilize the generated high-temperature steam to act on the medical devices to be sterilized for a certain period of time, causing the proteins of the microorganisms attached to the medical devices to denature, thus killing the microorganisms and achieving the purpose of sterilization. Steam sterilization is currently one of the most effective sterilization methods widely used in the medical industry and is the preferred sterilization method for high-temperature resistant medical devices.

[0004] Traditional high-temperature sterilizers require manual operation to open the sealed door after sterilization. However, this method has several drawbacks. Firstly, it complicates the operation and increases labor costs. As a pressure device, the sterilizer's sealed door is very heavy for safety reasons, and manually opening and closing it is physically demanding. Secondly, the sterilizer contains a large amount of high-temperature steam, which poses a safety threat to personnel operating at close range to open the sealed door. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, the purpose of this application is to provide an automatic door opening device for a sterilizer and a sterilizer, which can reduce the manpower required and improve the safety protection of workers.

[0006] The objective of this application is achieved through the following technical solution:

[0007] On the one hand, this application provides an automatic door opening device for a sterilizer sealing door.

[0008] An automatic door opening device for a sterilizer's sealing door includes a mounting base and a positioning base. A drive cylinder is mounted on the mounting base, with its cylinder barrel rotatably connected to the mounting base. A drive rod is rotatably mounted on the positioning base in a vertical direction, with its output shaft connected to the drive rod via a transmission connection. A solenoid valve is mounted on the mounting base, connected to the drive cylinder to control its opening or closing. A first limiting member is mounted on the positioning base, electrically connected to the solenoid valve, and used to limit the retraction distance of the drive cylinder's output shaft.

[0009] In some possible embodiments, a mounting shaft is rotatably mounted on the positioning seat in the vertical direction. The mounting shaft is coaxially and fixedly connected to the drive rod. A first connecting rod is fixedly connected to the end of the mounting shaft away from the drive rod. A connecting shaft is rotatably mounted in the vertical direction at the end of the first connecting rod away from the mounting shaft. A second connecting rod is coaxially and fixedly mounted at the end of the drive cylinder output shaft. The end of the second connecting rod away from the drive cylinder output shaft is rotatably connected to the connecting shaft.

[0010] In some possible embodiments, a universal joint is fixedly provided at the end of the drive rod, and a transmission rod is fixedly provided vertically at the end of the universal joint away from the drive rod.

[0011] Preferably, the cylinder barrel of the drive cylinder and the mounting base are connected by a hinged joint for a hinged rotatable connection; the second connecting rod and the connecting shaft are connected by a fisheye bearing for a rotatable connection.

[0012] In some possible embodiments, the first limiting member is configured as a first limit switch, the fixing part of the first limiting member is fixedly mounted on the positioning seat, and a paddle is provided on the output shaft of the driving cylinder, the paddle being used to abut against the trigger part of the first limiting member.

[0013] Preferably, the paddle is slidably disposed on the output shaft of the drive cylinder along the length direction of the output shaft of the drive cylinder, and a positioning member is provided on the output shaft of the drive cylinder to limit the position of the paddle on the output shaft of the drive cylinder.

[0014] In some possible embodiments, a positioning ring is slidably sleeved on the output shaft of the drive cylinder, a paddle is disposed at the bottom of the positioning ring, the positioning element is configured as a positioning bolt, an installation hole is provided at the top of the positioning ring, the positioning element is threaded through the installation hole, a sliding groove is provided on the output shaft of the drive cylinder along its length, the end of the positioning element is slidably disposed in the sliding groove, and the bottom of the positioning element is used to abut against the bottom wall of the sliding groove.

[0015] In some possible embodiments, an abutment ring is slidably fitted on the peripheral wall of one end of the positioning member located in the groove. The inner wall of the abutment ring is rotatably connected to the positioning member, and the outer wall is used for rolling contact with the inner sidewall of the groove.

[0016] In some possible embodiments, an anti-slip abutment piece is fixedly provided at the bottom of the positioning member, the anti-slip abutment piece being used to abut against the inner bottom wall of the groove.

[0017] In some possible embodiments, a slot is provided at the bottom of the positioning ring, and an insert block is slidably disposed within the slot. The insert block is fixedly connected to the top of the lever. A magnetic attractor is fixedly disposed on the inner wall of the slot, and a magnetic element adapted to the magnetic attractor is disposed on the top of the insert block.

[0018] On the other hand, this application also provides a sterilizer.

[0019] A sterilizer includes a housing and a door rotatably mounted on the housing, and also includes an automatic door opening device as described above; the mounting base and the positioning base are both fixedly mounted on the top of the housing, the drive rod is connected to the door rotation shaft, a second limiting member is provided on the housing, the second limiting member is electrically connected to a solenoid valve, and the second limiting member is used to limit the extension distance of the output shaft of the drive cylinder.

[0020] In some possible embodiments, the second limiting member is configured as a second limit switch, the fixing part of the second limiting member is fixedly disposed on the side wall of the door, and the triggering part of the second limiting member is used to abut against the box body.

[0021] In summary, the technical solutions of this application have at least the following advantages and beneficial effects:

[0022] 1. In actual use, opening the solenoid valve starts the drive cylinder, which in turn moves the output shaft of the drive cylinder, causing the drive rod to rotate. Since the end of the drive rod is usually connected to the rotation shaft of the door, the rotation shaft of the door rotates along with the drive rod, thus opening the door. Once the door is opened to a certain angle, the first limiting component limits the retraction distance of the drive cylinder's output shaft, thereby limiting the opening angle of the door. Operation is simple and convenient, eliminating the need for manual opening of the door and achieving automatic opening and closing of the sterilizer. This reduces or eliminates the need for manual operation, improving worker safety and enhancing the smoothness and reliability of the sterilizer's opening and closing. 2. By installing a universal joint at the end of the drive rod, connecting the drive rod and the transmission rod, which in turn connects to the rotation shaft of the door, the device has a certain degree of freedom in the horizontal direction when driving the door to rotate. This allows for smoother opening and closing of the door. The universal joint also helps prevent jamming between shafts, improving the reliability of the device during use.

[0023] 3. By abutting the trigger part of the first limit member with the paddle, the solenoid valve is closed and the drive cylinder is stopped. The structure is simple and easy to use. The opening angle of the box door can be adjusted by adjusting the position of the paddle on the output shaft of the drive cylinder, which effectively improves the applicability of the device.

[0024] 4. After the door is closed, the solenoid valve closes after the housing comes into contact with the trigger of the second limiter. As the solenoid valve closes, the drive cylinder is shut off, thus avoiding damage to the transmission components caused by the drive cylinder failing to shut off in time after the door has made hard contact with the housing. This improves the reliability and safety of the device in actual use. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the automatic door opening device for a sealed door according to an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the installation structure between the automatic door opening device and the sealed door according to an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of one embodiment of the paddle in this application.

[0028] Figure 4 This is an exploded structural diagram of the positioning component according to an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the exploded structure of the abutment ring according to an embodiment of this application;

[0030] Figure 6 This is an exploded view of the paddle in an embodiment of this application;

[0031] Figure 7 This is a schematic diagram of the overall structure of a sterilizer according to an embodiment of this application;

[0032] Figure 8 This is a schematic diagram of the structure of the second limiting member in an embodiment of this application.

[0033] Icons: 1. Mounting base; 11. Drive cylinder; 12. Hinge seat; 13. Solenoid valve; 2. Positioning seat; 21. Drive rod; 22. Mounting shaft; 23. First connecting rod; 24. Connecting shaft; 25. Second connecting rod; 26. Fisheye bearing; 27. Universal joint; 28. Transmission rod; 3. First limiting component; 31. Paddle; 4. Positioning component; 41. Positioning ring; 42. Mounting hole; 43. Slide groove; 44. Abutment ring; 45. Annular groove; 46. Annular block; 47. Anti-slip abutment piece; 5. Slot; 51. Insert block; 52. Magnetic component; 53. Magnetic component; 6. Housing; 7. Door; 8. Second limiting component. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] The following is for reference Figures 1 to 8 This application will be described in further detail.

[0036] On the one hand, this application provides an automatic door opening device for a sterilizer sealing door.

[0037] Reference Figure 1 , 2 An automatic door opening device for a sterilizer's sealed door includes a mounting base 1 and a positioning base 2. A drive cylinder 11 is mounted on the mounting base 1. (Referring to...) Figure 1 The cylinder barrel of the drive cylinder 11 is rotatably connected to the mounting base 1 by means of a hinged seat 12. A drive rod 21 is rotatably mounted on the positioning base 2 in the vertical direction. The output shaft of the drive cylinder 11 is connected to the drive rod 21 for transmission. A solenoid valve 13 is provided on the mounting base 1. The solenoid valve 13 is connected to the drive cylinder 11 to control the opening or closing of the drive cylinder 11. A first limiting member 3 is provided on the positioning base 2. The first limiting member 3 is electrically connected to the solenoid valve 13. The first limiting member 3 is used to limit the retraction distance of the output shaft of the drive cylinder 11.

[0038] Reference Figure 1 , 2 A mounting shaft 22 is rotatably mounted on the positioning seat 2 in the vertical direction. The mounting shaft 22 is coaxially and fixedly connected to the drive rod 21, that is, the mounting shaft 22 and the drive rod 21 rotate synchronously. A first connecting rod 23 is fixedly connected to the end of the mounting shaft 22 away from the drive rod 21. As one embodiment of this application, see below. Figure 1The mounting shaft 22 and the first connecting rod 23 are fixed together by bolt fastening. A connecting shaft 24 is rotatably mounted vertically at the end of the first connecting rod 23 away from the mounting shaft 22. A second connecting rod 25 is coaxially fixed at the end of the output shaft of the drive cylinder 11. As one embodiment of this application, see below. Figure 1 The output end of the drive cylinder 11 is fixedly connected to the second connecting rod 25 by a threaded connection. The end of the second connecting rod 25 away from the output shaft of the drive cylinder 11 is rotatably connected to the connecting shaft 24. As one embodiment of this application, see [reference]. Figure 1 The second connecting rod 25 and the connecting shaft 24 are rotatably connected by a fisheye bearing 26.

[0039] In actual use, when the output shaft of the drive cylinder 11 retracts, it causes the second connecting rod 25 to move towards the mounting base 1. The second connecting rod 25 rotates counterclockwise relative to the connecting shaft 24 via the fisheye bearing 26, causing the first connecting rod 23 to rotate counterclockwise along the axis of the mounting shaft 22. This, in turn, causes the mounting shaft 22 to rotate counterclockwise along its own axis, subsequently causing the drive rod 21 to rotate counterclockwise along its own axis. When the output shaft of the drive cylinder 11 extends, the second connecting rod 25 moves away from the mounting base 1. The second connecting rod 25 rotates clockwise relative to the connecting shaft 24, causing the first connecting rod 23 to rotate clockwise along the axis of the mounting shaft 22. This, in turn, causes the mounting shaft 22 to rotate clockwise along its own axis, subsequently causing the drive rod 21 to rotate clockwise along its own axis.

[0040] Reference Figure 1 , 2 A universal joint 27 is fixedly installed at the end of the drive rod 21, and a transmission rod 28 is fixedly installed vertically at the end of the universal joint 27 away from the drive rod 21. By installing the universal joint 27 at the end of the drive rod 21, the drive rod 21 and the transmission rod 28 are connected through the universal joint 27. The transmission rod 28 is finally connected to the rotation shaft of the door 7. This allows the device to have a certain degree of deformation freedom in the horizontal direction when driving the door 7 to rotate, making the opening and closing of the door 7 smoother and avoiding jamming between shafts to a certain extent, thus improving the reliability of the device during use.

[0041] As one embodiment of this application, refer to Figure 1 , 2 The first limiting member 3 is configured as a first limit switch. The fixing part of the first limiting member 3 is fixedly mounted on the positioning seat 2. A lever 31 is provided on the output shaft of the drive cylinder 11, and the lever 31 is used to abut against the trigger part of the first limiting member 3. As one embodiment of this application, refer to Figure 1 , 2The paddle 31 is fixedly connected to the output shaft of the drive cylinder 11.

[0042] As another embodiment of this application, refer to Figure 3 , 4 The paddle 31 is slidably disposed on the output shaft of the drive cylinder 11 along the length direction of the output shaft of the drive cylinder 11. A positioning member 4 is provided on the output shaft of the drive cylinder 11 to limit the position of the paddle 31 on the output shaft of the drive cylinder 11.

[0043] By abutting the trigger part of the first limiting member 3 with the paddle 31, the solenoid valve 13 is closed and the drive cylinder 11 is shut down. The structure is simple and easy to use. The opening angle of the box door 7 can be adjusted by adjusting the position of the paddle 31 on the output shaft of the drive cylinder 11, which effectively improves the applicability of the device.

[0044] Reference Figure 3 , 4 A positioning ring 41 is slidably sleeved on the output shaft of the drive cylinder 11. A paddle 31 is disposed at the bottom of the positioning ring 41. The positioning element 4 is a positioning bolt. An installation hole 42 is provided at the top of the positioning ring 41. The positioning element 4 is threaded through the installation hole 42. A sliding groove 43 is provided on the output shaft of the drive cylinder 11 along its length direction. The end of the positioning element 4 is slidably disposed in the sliding groove 43. The bottom of the positioning element 4 is used to abut against the bottom wall of the sliding groove 43.

[0045] The opening angle of the door 7 can be adjusted by adjusting the position of the paddle 31 on the output shaft of the drive cylinder 11, which effectively improves the applicability of the device. When it is necessary to adjust the position of the paddle 31 on the output shaft of the drive cylinder 11, first turn the positioning part 4 so that the end of the positioning part 4 is disengaged from the bottom wall of the slide groove 43. At this time, the positioning ring 41 can be driven to slide on the output shaft of the drive cylinder 11, thereby achieving the purpose of adjusting the position of the paddle 31. After the position of the paddle 31 is adjusted to the correct position, turn the positioning part 4 so that the bottom of the positioning part 4 contacts the bottom wall of the slide groove 43. The position of the positioning ring 41 and the paddle 31 is limited by the friction between the positioning part 4 and the slide groove 43. The operation is convenient and quick, the structure is simple and practical, and it has good practicality.

[0046] Reference Figure 4 , 5An abutment ring 44 is slidably sleeved on the peripheral wall of one end of the positioning member 4 located in the slide groove 43. The inner wall of the abutment ring 44 is rotatably connected to the positioning member 4, and the outer wall is used for rolling contact with the inner side wall of the slide groove 43. As one embodiment of this application, an annular groove 45 is opened on the positioning member 4 along the circumference of the positioning member 4. An annular block 46 is slidably arranged in the annular groove 45. The annular block 46 is fixedly connected to the inner wall of the abutment ring 44. During the adjustment of the position of the lever 31, the outer wall of the abutment ring 44 rolls in contact with the inner side wall of the slide groove 43, reducing the friction between the positioning member 4 and the inner wall of the slide groove 43, avoiding the positioning member 4 from directly abutting with the inner wall of the slide groove 43, causing the positioning member 4 to deflect in the mounting hole 42 under the action of friction, thereby causing the positioning member 4 to disengage from the mounting hole 42, improving the reliability and safety of the device in actual use.

[0047] Reference Figure 4 , 5 An anti-slip abutment piece 47 is fixedly provided at the bottom of the positioning part 4. The anti-slip abutment piece 47 is used to abut against the inner bottom wall of the slide groove 43. By providing the anti-slip abutment piece 47, the friction between the bottom of the positioning part 4 and the inner bottom wall of the slide groove 43 is effectively improved.

[0048] Reference Figure 6 A slot 5 is provided at the bottom of the positioning ring 41, and an insert block 51 is slidably disposed in the slot 5. The insert block 51 is fixedly connected to the top of the lever 31. A magnetic suction element 52 is fixedly disposed on the inner wall of the slot 5, and a magnetic element 53 adapted to the magnetic suction element 52 is disposed on the top of the insert block 51. Since the lever 31 is detachable from the positioning ring 41, it can effectively facilitate the disassembly and cleaning of the lever 31 by the staff, thereby improving the practicality of the device.

[0049] Of course, in other embodiments, the paddle 31 may also be fixedly connected to the positioning ring 41 in a non-removable manner, or it may be fixedly connected by screws.

[0050] On the other hand, this application also provides a sterilizer.

[0051] Reference Figure 7 , 8 A sterilizer includes a housing 6 and a door 7 rotatably mounted on the housing 6, and also includes an automatic door opening device as described above; the mounting base 1 and the positioning base 2 are both fixedly mounted on the top of the housing 6, the drive rod 21 is connected to the rotating shaft of the door 7, a second limiting member 8 is provided on the housing 6, the second limiting member 8 is electrically connected to the solenoid valve 13, and the second limiting member 8 is used to limit the extension distance of the output shaft of the drive cylinder 11.

[0052] As one embodiment of this application, refer to Figure 7 , 8The second limiting member 8 is configured as a second limit switch. The fixing part of the second limiting member 8 is fixedly installed on the side wall of the door 7, and the triggering part of the second limiting member 8 is used to abut against the box body 6.

[0053] After the door 7 is closed, the solenoid valve 13 closes after the housing 6 comes into contact with the trigger of the second limiting member 8. As the solenoid valve 13 closes, the drive cylinder 11 is shut off. This prevents damage to the transmission components from occurring because the drive cylinder 11 cannot be shut off in time after the door 7 and housing 6 have made hard contact. This improves the reliability and safety of the device in actual use.

[0054] The implementation principle of the automatic door opening device for a sterilizer's sealing door and the sterilizer proposed in this application is as follows:

[0055] In actual use, opening the solenoid valve 13 starts the drive cylinder 11, the output shaft of the drive cylinder 11 retracts, driving the second connecting rod 25 to move towards the mounting base 1. The second connecting rod 25 deflects counterclockwise relative to the connecting shaft 24 through the fisheye bearing 26, and drives the first connecting rod 23 to deflect counterclockwise along the axis of the mounting shaft 22, thereby driving the mounting shaft 22 to rotate counterclockwise along its own axis, and then driving the drive rod 21 to rotate counterclockwise along its own axis. Since the drive rod 21 is connected to the transmission rod 28 through the universal joint 27, and the transmission rod 28 is connected to the rotation shaft of the door 7, the counterclockwise rotation of the drive rod 21 can drive the door 7 to deflect counterclockwise, thereby realizing the operation of opening the door 7 without the need for the operator to manually open the door 7. When the door 7 is opened to a certain angle, the paddle 31 abuts against the trigger part of the first limit member 3, thereby stopping the solenoid valve 13. The solenoid valve 13 closes the drive cylinder 11 and stops the deflection of the door 7. Conversely, by extending the output shaft of the drive cylinder 11, the door 7 can be rotated clockwise. After the door 7 closes with the housing 6, the door 7 drives the second limit member 8 to make its trigger part abut against the housing 6, thereby shutting off the solenoid valve 13. The solenoid valve 13 then shuts off the drive cylinder 11, thus preventing damage to the transmission components caused by the drive cylinder 11 failing to shut off in time after the door 7 has made hard contact with the housing 6. This improves the reliability and safety of the device in actual use. During the opening and closing of the door 7, there is no need for staff to manually open or close the door 7, effectively reducing manpower and improving the safety of staff.

[0056] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic door opening device for a sterilizer's sealing door, characterized in that: The device includes a mounting base and a positioning base. A drive cylinder is mounted on the mounting base, and the cylinder barrel of the drive cylinder is rotatably connected to the mounting base. A drive rod is rotatably mounted on the positioning base in the vertical direction, and the output shaft of the drive cylinder is connected to the drive rod in a transmission manner. A solenoid valve is mounted on the mounting base and is connected to the drive cylinder to control the opening or closing of the drive cylinder. A first limiting member is mounted on the positioning base and is electrically connected to the solenoid valve. The first limiting member is used to limit the retraction distance of the output shaft of the drive cylinder. The first limiting member is configured as a first limit switch. The fixing part of the first limiting member is fixedly mounted on the positioning seat. A paddle is provided on the output shaft of the driving cylinder. The paddle is used to abut against the trigger part of the first limiting member. The paddle is slidably disposed on the output shaft of the drive cylinder along the length direction of the output shaft of the drive cylinder. A positioning element is provided on the output shaft of the drive cylinder, which is used to limit the position of the paddle on the output shaft of the drive cylinder. A positioning ring is slidably sleeved on the output shaft of the drive cylinder, and a paddle is set at the bottom of the positioning ring. The positioning element is set as a positioning bolt. An installation hole is opened at the top of the positioning ring, and the positioning element is threaded through the installation hole. A sliding groove is opened on the output shaft of the drive cylinder along its length direction. The end of the positioning element is slidably set in the sliding groove, and the bottom of the positioning element is used to abut against the bottom wall of the sliding groove. An abutment ring is slidably sleeved on the peripheral wall of one end of the positioning member located in the chute. The inner wall of the abutment ring is rotatably connected to the positioning member, and the outer wall is used to roll contact with the inner side wall of the chute. An anti-slip abutment piece is fixedly provided at the bottom of the positioning member. The anti-slip abutment piece is used to abut against the inner bottom wall of the chute.

2. The automatic door opening device for a sterilizer sealing door according to claim 1, characterized in that: A slot is provided at the bottom of the positioning ring, and an insert block is slidably disposed in the slot. The insert block is fixedly connected to the top of the lever. A magnetic attractor is fixedly disposed on the inner wall of the slot, and a magnetic component that matches the magnetic attractor is disposed on the top of the insert block.

3. The automatic door opening device for a sterilizer sealing door according to claim 1, characterized in that: An mounting shaft is rotatably mounted on the positioning seat in the vertical direction. The mounting shaft is coaxially and fixedly connected to the drive rod. A first connecting rod is fixedly connected to the end of the mounting shaft away from the drive rod. A connecting shaft is rotatably mounted on the end of the first connecting rod away from the mounting shaft in the vertical direction. A second connecting rod is coaxially and fixedly mounted on the end of the drive cylinder output shaft. The end of the second connecting rod away from the drive cylinder output shaft is rotatably connected to the connecting shaft.

4. The automatic door opening device for a sterilizer sealing door according to claim 3, characterized in that: A universal joint is fixedly installed at the end of the drive rod, and a transmission rod is fixedly installed vertically at the end of the universal joint away from the drive rod; the cylinder of the drive cylinder and the mounting base are connected by a hinged seat for hinged rotation; the second connecting rod and the connecting shaft are connected by a fisheye bearing for rotation.

5. A sterilizer, comprising a chamber and a door rotatably disposed on the chamber, characterized in that: It also includes an automatic door opening device for a sealed door as described in any one of claims 1-4; the mounting base and the positioning base are both fixedly disposed on the top of the housing, the drive rod is connected to the rotating shaft of the housing door through transmission, a second limiting member is disposed on the housing, the second limiting member is electrically connected to the solenoid valve, and the second limiting member is used to limit the extension distance of the output shaft of the drive cylinder.

6. A sterilizer according to claim 5, characterized in that: The second limiting member is configured as a second limit switch. The fixing part of the second limiting member is fixedly installed on the side wall of the door, and the triggering part of the second limiting member is used to abut against the box body.

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