Limit switch and steam sterilizer

Abstract

The present application relates to the technical field of steam sterilizers, and discloses a travel switch and a steam sterilizer. It includes a bracket; a first microswitch and a second microswitch; a trigger structure; and a moving structure connected to the trigger structure, the moving structure being liftable and installed on the bracket, the moving structure being used to contact the door body and drive the trigger structure to move; wherein the trigger structure includes a low stage for triggering the first microswitch, and a high stage for triggering the second microswitch, and the lowest end of the high stage is higher than the lowest end of the low stage. The travel switch of the present application can send different signals according to the stroke of the trigger structure, so that the travel switch can cooperate with the usage scenario and meet the different usage requirements of the equipment at different stroke positions. The present application also discloses a steam sterilizer.

Description

Technical Field

[0001] The present application relates to the technical field of steam sterilizers, for example, to a travel switch and a steam sterilizer. Background Art

[0002] A steam sterilizer is a closed container with a door. It uses high temperature to destroy the temperature conditions for the growth and reproduction of bacteria to achieve the purpose of sterilization. Its sterilization medium is pressurized steam. The door is required to be kept closed during the sterilization process.

[0003] Prior art indicates the closed position of the sterilizer door by directly pressing a pressure plate on the door against a cylindrical microswitch fixed to the sterilizer cylinder. This type of door closed position indicator only displays the initial closed position of the door. However, the internal pressure of the sterilizer fluctuates during operation. When the pressure rises to a certain level, the door assembly elastically deforms, causing the door position to fluctuate. Although this fluctuation is within the design range of the entire device, it may exceed the microswitch's activation threshold. Due to its structural design, the microswitch will activate, sending a switch signal that indicates the door is open, interrupting the sterilization process.

[0004] The current solution is to adjust the switch position so that it presses the door switch in advance, sending out a false signal. In fact, the door is not fully closed yet. Running the equipment when the door is not fully closed will bring hidden dangers to the safe operation of the equipment. If an accident occurs, it may cause damage to equipment and personnel. Summary of the Invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The embodiments of the present disclosure provide a travel switch and a steam sterilizer to solve the problem of unstable operation of the steam sterilizer due to inaccurate door position indication.

[0007] In some embodiments, the travel switch includes: a bracket; a first microswitch and a second microswitch; a trigger structure; and a moving structure connected to the trigger structure, the moving structure can be raised and lowered and installed on the bracket, the moving structure is used to contact the door body and drive the trigger structure to move; wherein, the trigger structure includes a low stage for triggering the first microswitch, and a high stage for triggering the second microswitch, and the lowest end of the high stage is higher than the lowest end of the low stage.

[0008] Optionally, the first micro switch and the second micro switch are symmetrically arranged on both sides of the trigger structure.

[0009] Optionally, the trigger structure includes: a first cylinder connected to the movable structure, for triggering the first microswitch and the second microswitch, wherein the first cylinder includes: a low stage, arranged on one side of the first microswitch; and a high stage, arranged on one side of the second microswitch.

[0010] Optionally, a diameter of the first column is greater than a horizontal distance between the first micro switch and the second micro switch.

[0011] Optionally, the trigger structure further includes: a second cylinder connected to the first cylinder, wherein the diameter of the second cylinder is smaller than the diameter of the first cylinder, and the diameter of the second cylinder is less than or equal to the horizontal distance between the first micro switch and the second micro switch.

[0012] Optionally, the bracket includes: a third fixing plate for guiding the movement of the second column, and a hole groove for the second column to pass through is provided in the middle of the third fixing plate.

[0013] Optionally, the movable structure includes: a trigger link connected to the trigger structure; and a spring sleeved on the outside of the trigger link, wherein the spring is used to reset the trigger link.

[0014] Optionally, the trigger link includes: a contact column for contacting the door body; a positioning plate connected to the contact column and used to cooperate with the bracket to limit the spring; and a connecting rod connected to the positioning plate and connected to the trigger structure.

[0015] In some embodiments, the steam sterilizer includes: the aforementioned travel switch.

[0016] Optionally, the steam sterilizer further includes a control system comprising a door closing unit and a sterilization control unit. The door closing unit is configured to, in an activated state, determine the open or closed state of the steam sterilizer door based on the second signal. The sterilization control unit is configured to, in a sterilization state, determine the operating state of the steam sterilizer based on the first signal and the second signal.

[0017] The travel switch provided by the embodiments of the present disclosure can achieve the following technical effects:

[0018] The travel switch provided by the embodiment of the present disclosure is provided with a movable trigger structure and two micro switches, a first micro switch and a second micro switch, on a bracket. The trigger structure can move with the movable structure. Since the trigger structure is provided with a low stage and a high stage, the low stage first contacts the first micro switch, and then as the trigger structure moves downward, the high stage contacts the second micro switch. The first micro switch and the second micro switch are triggered successively by the trigger structure. This type of travel switch can send different signals according to the stroke of the trigger structure, so that the travel switch can be used in conjunction with the usage scenario to meet the different usage requirements of the equipment at different travel positions.

[0019] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0021] Figure 1 1 is a schematic structural diagram of a travel switch provided by an embodiment of the present disclosure;

[0022] Figure 2 is a structural diagram of a trigger structure provided by an embodiment of the present disclosure;

[0023] Figure 3 is a schematic structural diagram of a trigger connecting rod provided in an embodiment of the present disclosure;

[0024] Figure 4 is a schematic structural diagram of a bracket provided by an embodiment of the present disclosure;

[0025] Figure 5 This is a schematic diagram of the installation position of the guide nut provided in an embodiment of the present disclosure.

[0026] Reference numerals:

[0027] 10: Bracket; 11: Vertical plate; 12: First fixing plate; 13: Second fixing plate; 14: Third fixing plate; 15: First mounting plate; 16: Second mounting plate; 20: First microswitch; 21: First contact; 30: Second microswitch; 31: Second contact; 40: Trigger structure; 41: First column; 411: High stage; 412: Low stage; 42: Transition cone; 43: Second column; 50: Trigger link; 51: Contact column; 52: Positioning plate; 53: Connecting rod; 60: Spring; 70: Guide nut; 80: Locking nut. DETAILED DESCRIPTION

[0028] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0029] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0030] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0031] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0032] Unless otherwise stated, the term "plurality" means two or more.

[0033] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0034] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0035] In the embodiment of the present disclosure, words such as "lift", "high", "low", and "horizontal" that relate to the description of direction are used in the following examples: Figure 1 Based on the orientation shown, the words used are for the convenience of explaining the positional relationship between the various structures of the present application and the principles of the embodiments of the present disclosure, and are not intended to limit the scope of protection of the present application.

[0036] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0037] Combine Figure 1 As shown, an embodiment of the present disclosure provides a travel switch, including a bracket 10, a first micro switch 20, a second micro switch 30, a trigger structure and a moving structure.

[0038] The movable structure is connected to the trigger structure. The movable structure can be lifted and lowered on the bracket 10. The movable structure is used to contact the door body and drive the trigger structure to move.

[0039] The trigger structure includes a low stage 412 for triggering the first micro switch 20 and a high stage 411 for triggering the second micro switch 30 , and the lowest end of the high stage 411 is higher than the lowest end of the low stage 412 .

[0040] The travel switch provided by the embodiment of the present disclosure is adopted, and a movable trigger structure and two micro switches, a first micro switch 20 and a second micro switch 30, are set on the bracket 10. The trigger structure can move with the movable structure. Since the trigger structure is provided with a low stage 412 and a high stage 411, the low stage 412 first contacts the first micro switch 20, and then as the trigger structure moves downward, the high stage 411 contacts the second micro switch 30. The first micro switch 20 and the second micro switch 30 are triggered successively by the trigger structure. This type of travel switch can send different signals according to the travel of the trigger structure, so that the travel switch can be used in conjunction with the usage scenario to meet the different usage requirements of the equipment at different travel positions.

[0041] As an example, Figure 1As shown, the trigger structure 40 can move up and down. When the trigger structure 40 is not under pressure, it does not trigger the first microswitch 20 or the second microswitch 30. When pressure is applied, the trigger structure 40 begins to move downward and begins to press the first contact 21, causing the first microswitch 20 to emit a first signal. At this time, the trigger structure 40 does not trigger the second microswitch 30. When the trigger structure 40 continues to move downward under pressure and begins to press the second contact 31, both the first microswitch 20 and the second microswitch 30 are triggered, and the limit switch emits the first and second signals. When using this limit switch, related equipment can adjust its working plan based on the transmission and reception of the first and second signals.

[0042] As another example, the trigger structure 40 can move up and down. When the trigger structure 40 is not under pressure, it does not trigger the first microswitch 20 or the second microswitch 30. When pressure is applied, the trigger structure 40 begins to move downward and gradually presses the first contact 21, causing the first microswitch 20 to emit a first signal. At this time, the trigger structure 40 does not trigger the second microswitch 30. When the trigger structure 40 continues to move downward under pressure, it begins to press the second contact 31, causing the second microswitch 30 to emit a second signal. At this time, the first microswitch 20 is released from the trigger state, and the first and second microswitch 20 and 30 are not triggered simultaneously. When using this type of travel switch, related equipment can control the working process based on the type of signal received.

[0043] Optionally, the first micro switch 20 and the second micro switch 30 are symmetrically arranged on both sides of the trigger structure.

[0044] It can be understood that the first micro switch 20 and the second micro switch 30 are respectively arranged on both sides of the trigger structure, and the setting height of the first micro switch 20 is the same as the setting height of the second micro switch 30.

[0045] Combine Figure 1 As shown, optionally, the trigger structure includes: a first cylinder 41, connected to the moving structure, for triggering the first micro switch 20 and the second micro switch 30, wherein the first cylinder 41 includes: a low stage 412, arranged on one side of the first micro switch 20; and a high stage 411, arranged on one side of the second micro switch 30.

[0046] It can be understood that the trigger structure triggers the micro switch by pressing the contacts of the micro switch. The pressing process is mainly achieved through the first column 41. The first column 41 is stepped. The low stage 412 is used to trigger the first micro switch 20, and the high stage 411 is used to trigger the second micro switch 30.

[0047] Optionally, the diameter of the first column 41 is greater than the horizontal distance between the first micro switch 20 and the second micro switch 30 .

[0048] It can be understood that the embodiment of the present disclosure mainly limits the horizontal distance between the trigger structure 40 and the first micro switch 20 and the second micro switch 30 to achieve the pressing action of the trigger structure 40 on the first contact 21 and the second contact 31.

[0049] Optionally, the trigger structure further includes: a second cylinder connected to the first cylinder, wherein the diameter of the second cylinder is smaller than the diameter of the first cylinder, and the diameter of the second cylinder is smaller than or equal to the horizontal distance between the first micro switch and the second micro switch.

[0050] As an example, the first column 41 and the second column 43 are coaxially arranged, the thicker end of the transition cone 42 is connected to the first column 41, and the thinner end of the transition cone 42 is connected to the second column 43, so that the contact process between the first contact 21 and the second contact 31 and the trigger structure 40 is relatively smooth.

[0051] As another example, the first cylinder 41, the transition cone 42, and the second cylinder 43 are coaxially arranged, the distance between the first contact 21 and the axis of the first cylinder 41 is the same as the distance between the second contact 31 and the axis of the first cylinder 41, the radius R1 of the first cylinder 41 is greater than the distance between the axes of the first contact 21 and the first cylinder 41, and the radius R2 of the second cylinder 43 is less than or equal to the distance between the axes of the first contact 21 and the second cylinder 43. In implementation, the second cylinder 43 does not press the first contact 21 and the second contact 31 together, while the first cylinder 41 presses the first contact 21 and the second contact 31 together.

[0052] Combine Figure 1 、 Figure 5 As shown, optionally, the bracket 10 includes a third fixing plate 14 for guiding the movement of the second column 43 , and a hole slot for the trigger structure to pass through is provided in the middle of the third fixing plate 14 .

[0053] It can be understood that the hole groove of the third fixing plate 14 cooperates with the second column 43 to guide the movement of the second column 43 .

[0054] Optionally, the moving structure includes a trigger link 50 connected to the trigger structure; and a spring 60 sleeved on the outside of the trigger link 50 .

[0055] Combine Figure 3 As shown, optionally, the trigger link 50 includes: a contact column 51 for contacting the door body; a positioning plate 52 connected to the contact column 51 and used to cooperate with the bracket 10 to limit the spring 60; a connecting rod 53 connected to the positioning plate 52 and connected to the trigger structure.

[0056] It can be understood that one end of the spring 60 is connected to the bracket 10 , and the other end of the spring 60 is connected to the positioning plate 52 , and the touch link is movably mounted on the bracket 10 via the spring 60 .

[0057] As an example, Figure 4 As shown, the bracket 10 includes a vertical plate 11, a fixed plate, and a mounting plate. The fixed plate includes a first fixing plate 12, a second fixing plate 13, and a third fixing plate 14. The first, second, and third fixing plates 12, 13, 14 are sequentially arranged on the vertical plate 11 from top to bottom. Each of the three fixing plates is provided with a through hole. The first through hole on the first fixing plate 12 and the second through hole on the second fixing plate 13 are both used to guide the movement of the trigger link 50. The third through hole on the third fixing plate 14 cooperates with the second column 43 of the trigger structure 40 to guide the second column 43 of the trigger structure 40. The mounting plate includes a first mounting plate 15 and a second mounting plate 16, which are respectively arranged on either side of the vertical plate 11. The first microswitch 20 is mounted on the first mounting plate 15, and the second microswitch 30 is mounted on the second mounting plate 16.

[0058] Optionally, the travel switch further includes a locking nut 80 and a guide nut 70 .

[0059] like Figure 1 As shown, a locking nut 80 is mounted on the first fixing plate 12. The locking nut 80 has an internal thread that mates with the guide nut 70. The guide nut 70 has an external thread that mates with the locking nut 80, and the locking nut 80 is used to tighten the guide nut 70. In addition, the guide nut 70 has a through hole for the contact post 51 of the trigger link 50 to pass through. The guide nut 70, the first fixing plate 12, and the second fixing plate 13 collectively serve to guide the trigger link 50.

[0060] As an example, Figure 5 As shown, the guide nut 70 is a stepped structure, the outer shoulder of the guide nut 70 abuts against the first fixing plate 12 , and the inner shoulder of the guide nut 70 is used to limit the positioning plate 52 .

[0061] Optionally, the first micro switch 20 and the second micro switch 30 may be roller type micro switches or lever type micro switches.

[0062] In some embodiments, the steam sterilizer includes the aforementioned travel switch.

[0063] Below Figures 1 to 5 Taking the travel switch shown in FIG. 1 as an example, the working principle of the travel switch applied to the door position indicating device of the steam sterilizer is explained.

[0064] The bracket 10 is provided with a limit switch, a first micro switch 20 and a second micro switch 30.

[0065] The limit switch includes a trigger link 50 and a spring 60. The trigger link 50 is movable up and down on the bracket 10. One end of the trigger link 50 is a contact pin 51, and the other end is a connecting rod 53 connected to the trigger structure 40. A positioning plate 52 is provided in the upper middle portion of the trigger link 50. The contact pin 51 is used to contact the steam sterilizer door to activate the limit switch; the positioning plate 52 cooperates with the second fixing plate 13 of the bracket 10 to limit the spring 60. Since the contact link is movable, the positioning plate 52 interacts with the spring 60. When the trigger link 50 is pressed downward by the door, the positioning plate 52 compresses the top of the spring 60. When the force acting on the trigger link 50 decreases, the spring 60 rebounds and begins to apply force to the positioning plate 52, causing the trigger link 50 to move closer to the door.

[0066] When the door is in the open state, the trigger link 50 is not subjected to pressure and is in a natural state. At this time, the trigger structure 40 is in the first position, and the first contact 21 and the second contact 31 are located around the second column 43 of the trigger structure 40. The trigger structure 40 does not trigger the first microswitch 20 and the second microswitch 30, and the travel switch has no signal; when the cabin door is closed, the trigger link 50 is subjected to the pressure of the door body, driving the trigger structure 40 to move downward and gradually pressing the first contact 21. At this time, the first microswitch 20 sends a first signal, but the door is not closed tightly at this time, and the first column 41 of the trigger structure 40 has not yet pressed the second contact 31. At this time, the steam sterilizer can only receive the first signal; when the door is tightly closed, the trigger link 50 will continue to drive the trigger structure 40 to move downward and press the second contact 31. At this time, the first microswitch 20 and the second microswitch 30 are both triggered, and the travel switch sends the first signal and the second signal.

[0067] Furthermore, during operation of the steam sterilizer, the door will float, and the pressure on the end of the trigger link 50 will also change continuously. The spring 60 can cause the trigger link 50 to move with the position of the door, driving the trigger structure 40 to move, causing the pressure between the trigger structure 40, the first contact 21 and the second contact 31 to change. The change in the pressure between the first contact 21 and the second contact 31 can generate different signals. The steam sterilizer can control the operation process according to the signal from the limit switch.

[0068] Optionally, the steam sterilizer further includes a control system, which includes a door closing unit and a sterilization control unit.

[0069] The door closing unit is configured to determine the open or closed state of the door of the steam sterilizer according to the second signal when in the startup state.

[0070] The sterilization control unit is configured to determine the working state of the steam sterilizer according to the first signal and the second signal in the sterilization state.

[0071] It can be understood that determining whether the steam sterilizer door is open or closed based on the second signal includes, in the startup state, the door closing unit confirming that the steam sterilizer door is completely closed upon receiving the second signal. Determining the operating state of the steam sterilizer based on the first signal and the second signal includes, in the sterilization state, the steam sterilizer continuing sterilization when the sterilization control unit receives the first signal or the second signal, and stopping operation when the sterilization control unit does not receive the first signal or the second signal.

[0072] As an example, if the first microswitch 20 and the second microswitch 30 of the travel switch are not triggered simultaneously, in the startup state, the door closing unit can confirm that the steam sterilizer door is completely closed when receiving the second signal.

[0073] As another example, in the sterilization state, as long as the floating distance of the door of the steam sterilizer under pressure does not exceed the specified amplitude, that is, the vertical offset distance between the first contact 21 and the second contact 31, or the two switches are not disengaged at the same time, the control system controls the normal operation of the sterilization program; when the floating distance of the door is greater than the specified value, the first contact 21 and the second contact 31 are all out of the pressed state, and the door body is pushed open under steam pressure. The steam sterilizer may be at risk of operation, and the control system controls the steam sterilizer to stop operating.

[0074] That is, after applying this type of travel switch to the steam sterilizer, when the contacts of the two micro switches are simultaneously pressed together by the trigger structure 40, the steam sterilizer confirms and then sends a door closing completion signal. When the contacts of the two micro switches are released from the pressed state with the trigger structure 40, the steam sterilizer stops the sterilization work, thereby reducing the safety hazards generated during the operation of the equipment.

[0075] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A travel switch, characterized in that: include: The bracket (10) comprises a vertical plate (11), a first fixing plate (12) and a second fixing plate (13), wherein the first fixing plate (12) and the second fixing plate (13) are sequentially arranged on the vertical plate (11) from top to bottom; A first micro switch (20) and a second micro switch (30); a trigger structure comprising a first column (41) connected to the moving structure, for triggering the first micro switch (20) and the second micro switch (30), wherein the first micro switch (20) and the second micro switch (30) are symmetrically arranged on both sides of the first column (41); and A moving structure comprising a trigger link (50), a spring (60), a guide nut (70) and a locking nut (80); The first column (41) includes a low stage (412) provided on one side of the first micro switch (20) and a high stage (411) provided on one side of the second micro switch (30), wherein the lowest end of the high stage (411) is higher than the lowest end of the low stage (412); The trigger link (50) includes a contact column (51), a positioning plate (52) and a connecting rod (53); the contact column (51) is used to contact the door body; the positioning plate (52) is connected to the contact column (51) and is used to cooperate with the bracket (10) to limit the spring (60); the connecting rod (53) is respectively connected to the positioning plate (52) and the trigger structure; The spring (60) is sleeved on the outside of the trigger link (50), one end of which is connected to the bracket (10) and the other end of which is connected to the positioning plate (52); The guide nut (70) is provided with an external thread that cooperates with the locking nut (80), the locking nut (80) is mounted on the first fixing plate (12), and the locking nut (80) is provided with an internal thread that cooperates with the guide nut (70) for tightening the guide nut (70); The guide nut (70) is further provided with a through hole for the trigger link (50) to pass through, and the first fixing plate (12) and the second fixing plate (13) are respectively provided with a first through hole and a second through hole for the trigger link (50) to pass through, and the guide nut (70), the first fixing plate (12) and the second fixing plate (13) are used together to guide the trigger link (50).

2. The travel switch according to claim 1, characterized in that: The diameter of the first column (41) is greater than the horizontal distance between the first micro switch (20) and the second micro switch (30).

3. The travel switch according to claim 1, characterized in that: The trigger structure further includes: The second column (43) is connected to the first column (41), The diameter of the second column (43) is smaller than the diameter of the first column (41), and the diameter of the second column (43) is smaller than or equal to the horizontal distance between the first micro switch (20) and the second micro switch (30).

4. The travel switch according to claim 3, characterized in that: The support (10) comprises: The third fixing plate (14) is used to guide the movement of the second column (43), and a hole groove for the second column (43) to pass through is provided in the middle of the third fixing plate (14).

5. A steam sterilizer, characterized in that: The invention comprises a travel switch as claimed in any one of claims 1 to 4.

6. The steam sterilizer according to claim 5, characterized in that Also included is a control system, which includes a door closing unit and a sterilization control unit; The door closing unit is configured to determine the open or closed state of the door of the steam sterilizer according to the second signal when in the startup state; The sterilization control unit is configured to determine the working state of the steam sterilizer according to the first signal and the second signal in the sterilization state; The first signal is a signal sent when the first micro switch (20) is triggered, and the second signal is a signal sent when the second micro switch (30) is triggered.

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