An air exchange mechanism inside a box under a vacuum environment

Abstract

An embodiment of the present invention discloses a ventilation mechanism inside a box in a vacuum environment, including: a static ventilation component fixedly arranged inside an outer vacuum box; a lifting body component penetrating through the outer vacuum box; one end of the lifting body component located inside the outer vacuum box is connected to a dynamic ventilation component, and the dynamic ventilation component is pushed to move towards or away from the static ventilation component; at least two upper ventilation parts are arranged on the static ventilation component, and the at least two upper ventilation parts are all communicated with a ventilation box body; at least two lower ventilation parts are arranged on the dynamic ventilation component, and the at least two lower ventilation parts are all communicated with an external gas source; when the dynamic ventilation component moves to abut against the static ventilation component, the at least two lower ventilation parts are respectively conductively connected with the at least two upper ventilation parts one by one, so as to realize the gas exchange between the external gas source and the ventilation box body. The purpose of the present invention is to solve the problem of unstable internal ventilation in the prior art in a vacuum environment. The technical effect is that the ventilation between the box body inside the vacuum environment and the external atmospheric environment is stably realized.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of ventilation mechanisms, and particularly to a ventilation mechanism inside a box in a vacuum environment. Background Art

[0002] In the prior art, it is difficult to cool the box body inside a vacuum environment. In the case of heating required, the protection of electronic components in the vacuum is insufficient. Due to the particularity of the vacuum environment, the heat convection is weak, and it is very difficult to achieve the purpose of cooling or ventilation. The existing ventilation mechanisms have unstable ventilation and are likely to damage the vacuum environment.

[0003] There is a lack of a ventilation mechanism in a vacuum environment that has a simple power source and can transmit power into the interior of the vacuum environment through a transmission shaft, and realizes the ventilation purpose between the box body inside the vacuum box and the external environment through the cooperation of a moving ventilation plate and a static ventilation plate. There is also a lack of a ventilation mechanism in a vacuum environment that has a small floor area, a simple movement process, and is convenient for operation and control. Summary of the Invention

[0004] Therefore, the embodiments of the present invention provide a ventilation mechanism inside a box in a vacuum environment to solve the problem of unstable ventilation of the ventilation box body inside the vacuum environment in the prior art.

[0005] To achieve the above object, the embodiments of the present invention provide the following technical solutions:

[0006] According to the first aspect of the embodiments of the present invention, a ventilation mechanism inside a box in a vacuum environment includes: a static ventilation component, a dynamic ventilation component, and a lifting body transmission component; the static ventilation component is fixedly arranged inside the outer vacuum box; the lifting body component penetrates through the outer vacuum box; one end of the lifting body component inside the outer vacuum box is connected to the dynamic ventilation component, and pushes the dynamic ventilation component to move towards or away from the static ventilation component; at least two upper ventilation parts are arranged on the static ventilation component, and at least two upper ventilation parts are all communicated with the ventilation box body; at least two lower ventilation parts are arranged on the dynamic ventilation component, and at least two lower ventilation parts are all communicated with an external gas source; when the dynamic ventilation component moves to abut against the static ventilation component, at least two lower ventilation parts are respectively conductively connected with at least two upper ventilation parts one by one, so as to realize the gas exchange between the external gas source and the ventilation box body.

[0007] Further, the static ventilation component includes a static ventilation plate, and at least two upper ventilation parts penetrate and are fixed on the static ventilation plate.

[0008] Further, the upper air exchange component includes: an air connection compression valve core, an air connection component, an air connection valve core, and a valve core compression spring; the air connection component is fixedly penetrated on the static air exchange plate; a columnar accommodation cavity is formed on the air connection component, the air connection compression valve core is fixedly connected to the air connection component and covers the accommodation cavity; the air connection valve core is arranged in the accommodation cavity, a valve core compression spring is arranged between one end of the air connection valve core and the bottom of the accommodation cavity, and the other end of the air connection valve core penetrates through the air connection compression valve core and is slidably connected thereto.

[0009] Further, it further includes a buffer spring. A flange parallel to the lower surface of the static air exchange plate is arranged on the air connection component, and both ends of the buffer spring respectively abut against the lower surface of the static air exchange plate and the upper surface of the flange.

[0010] Further, the lower air exchange component includes: an air connection top core, an air connection top core pressing ring, and an O-ring; a columnar protrusion is arranged on the upper surface of the air connection top core, the air connection top core pressing ring is sleeved on the columnar protrusion and fixedly connected to the air connection top core, and the O-ring is sleeved on the top end of the columnar protrusion; when the upper surface of the air connection top core pressing ring abuts against the lower surface of the air connection compression valve core, the air connection top core presses the air connection valve core in, and the lower air exchange component and the upper air exchange component are conducted.

[0011] Further, the moving air exchange assembly includes a moving air exchange plate, at least two lower air exchange components are penetrated and arranged on the moving air exchange plate, and the lower surface of the moving air exchange plate is connected to one end of the lifting body transmission assembly.

[0012] Further, the lifting body transmission assembly includes: a transmission shaft, a fixed seat, a lifting block, and an eccentric wheel; the transmission shaft penetrates through the outer vacuum box; an eccentric wheel is fixedly connected to one end of the transmission shaft located inside the outer vacuum box, a lifting block is sleeved on the outer peripheral side of the eccentric wheel, the fixed seat is fixed inside the outer vacuum box body, a groove is formed on the fixed seat, and the lifting block is arranged in the groove and is slidably connected to the fixed seat.

[0013] Further, the transmission shaft is rotatably connected to the outer vacuum box through magnetic fluid.

[0014] Further, it further includes an air exchange fixing column. One end of the air exchange plate fixing column is fixed on the static air exchange plate, and the other end of the air exchange plate fixing column is fixed inside the outer vacuum box.

[0015] Further, it further includes multiple columns. The multiple columns are fixed on the upper surface of the static air exchange plate, and a silica gel sleeve is sleeved on the outer peripheral side of each column.

[0016] The present invention has the following advantages:

[0017] 1. Through the present invention, the problem of air exchange inside the box in a vacuum environment is well solved to achieve the purpose of cooling or air exchange;

[0018] 2. The servo motor drives the eccentric wheel to rotate smoothly and accurately, ensuring that the valve core can be pushed each time. The eccentric wheel saves design costs compared to cams, etc. The air connection parts are small and sensitive, saving space to the greatest extent;

[0019] 3. By setting a buffer spring, it is ensured that the vacuum environment inside the box is not damaged;

[0020] 4. The purpose of air exchange inside the box is achieved without damaging the vacuum environment, ensuring the production rate. The mechanism design is lightweight, ensuring the stability of the equipment;

[0021] 5. Through the action of the lower air connection part lifting and pressing the air connection valve core to open the valve core, a spring is used to close the valve core to ensure internal sealing, and a sealing ring is used between the two air connection parts to avoid damaging the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0023] The structures, proportions, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical substantive significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0024] Figure 1 It is a structural diagram of an air exchange mechanism inside a box under a vacuum environment provided by Embodiment 1 of the present invention.

[0025] Figure 2 It is a structural diagram of a dynamic air exchange component of an air exchange mechanism inside a box under a vacuum environment provided by Embodiment 3 of the present invention.

[0026] Figure 3 It is a structural diagram of a static air exchange component of an air exchange mechanism inside a box under a vacuum environment provided by Embodiment 3 of the present invention.

[0027] Figure 4 It is a structural diagram of an air exchange part of an air exchange mechanism inside a box under a vacuum environment provided by Embodiment 3 of the present invention.

[0028] Figure 5 For Figure 4 The sectional view of the air exchange part.

[0029] Figure 6 Schematic diagram of the use and installation of an air exchange mechanism inside a box under a vacuum environment provided in Embodiment 3 of the present invention.

[0030] Figure 7 Structural diagram of the lifting transmission component of an air exchange mechanism inside a box under a vacuum environment provided in Embodiment 2 of the present invention.

[0031] Figure 8 For Figure 7 Partial structural sectional view of the lifting transmission component.

[0032] In the figure: 1, static air exchange component; 2, dynamic air exchange component; 3, lifting body transmission component; 4, transmission shaft; 5, lifting block; 6, eccentric wheel; 7, fixed seat; 8, lower air exchange part; 9, upper air exchange part; 10, silicone sleeve; 11, air exchange plate fixing column; 12, column; 13, air pipe joint; 14, air receiving top core; 15, air receiving top core pressing ring; 16, O-ring seal; 17, air receiving pressing valve core; 18, air receiving part; 19, buffer spring; 20, air receiving valve core; 21, valve core compression spring; 22, servo motor; 23, outer vacuum box; 24, intake pipe; 25, outlet pipe; 26, air exchange box body; 27, magnetofluid. Detailed implementation manners

[0033] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0034] Embodiment 1

[0035] In a specific implementation manner of this embodiment, an air exchange mechanism inside a box under a vacuum environment, as Figure 1 shown, includes: a static air exchange component 1, a dynamic air exchange component 2, and a lifting body transmission component 3; the static air exchange component 1 is fixedly arranged inside the outer vacuum box 23; the lifting body component penetrates through the outer vacuum box 23; one end of the lifting body component located inside the outer vacuum box 23 is connected to the dynamic air exchange component 2, and pushes the dynamic air exchange component 2 to move towards or away from the static air exchange component 1; at least two upper air exchange parts 9 are arranged on the static air exchange component 1, and at least two upper air exchange parts 9 are all communicated with the air exchange box body 26; at least two lower air exchange parts 8 are arranged on the dynamic air exchange component 2, and at least two lower air exchange parts 8 are all communicated with an external air source; when the dynamic air exchange component 2 moves to abut against the static air exchange component 1, at least two lower air exchange parts 8 are respectively in one-to-one conduction with at least two upper air exchange parts 9, so as to realize the gas exchange between the external air source and the air exchange box body 26.

[0036] In a specific embodiment, the static air exchange component 1 is fixed inside the outer vacuum chamber 23 by bolts or clamping components, etc., and the dynamic air exchange component 2 is fixed on the lifting body transmission component 3 by bolts or clamping components, etc. When air flow exchange is required, the dynamic air exchange component 2 moves towards the static air exchange component 1, and each lower air exchange part 8 on the dynamic air exchange component 2 abuts against the upper air exchange part 9. Through the cooperation of the two, the internal air ducts of the lower air exchange part 8 and the upper air exchange part 9 are conducted. After at least one group of the upper air exchange part 9 and the lower air exchange part 8 are conducted, the gas from the external air source enters the air exchange chamber 26 through the air inlet pipe 24. At the same time, after at least one group of the upper air exchange part 9 and the lower air exchange part 8 are conducted, the gas inside the air exchange chamber 26 is led out to the outer vacuum chamber 23 through the air outlet pipe 25, thereby realizing the gas exchange between the external air source and the air exchange chamber 26. In the above specific embodiment, one end of the lifting body transmission component 3 located inside the outer vacuum chamber 23 can be composed of an eccentric wheel 6 mechanism, can be composed of a crank and connecting rod mechanism, or can be one of lifting mechanisms such as a cylinder and a hydraulic cylinder.

[0037] The technical effect achieved by this embodiment is: Stable air exchange inside the box in a vacuum environment is realized. Through the cooperation of the static air exchange component 1 and the dynamic air exchange component 2, while realizing stable air exchange, the structure is simple, the floor area is small, the movement process is simple, and it is convenient for operation and control.

[0038] Embodiment 2

[0039] This embodiment is further improved on the basis of Embodiment 1. As Figure 3 shown, the static air exchange component 1 includes a static air exchange plate, and the static air exchange plate can be a plate-shaped part. At least two upper air exchange parts 9 are fixed on the static air exchange plate. For example, in order to ensure the one-way inlet and outlet of gas, two upper air exchange parts 9 can be clamped or thread-connected on the static air exchange plate by snap rings. The air outlet of the two upper air exchange parts 9 is arranged on the upper surface of the static air exchange plate, and the conduction joint of the upper air exchange part 9 is arranged on the lower surface of the static air exchange plate.

[0040] In a specific embodiment, as Figure 4 and Figure 5As shown in the figure, the upper air exchange component 9 includes: an air connection compression valve core 17, an air connection component 18, an air connection valve core 20, and a valve core compression spring 21. Among them, the air connection component 18 can be a rotary body part, that is, the air connection component 18 is a cylindrical section and a flange section connected in sequence. The cylindrical section of the air connection component 18 penetrates the static air exchange plate, and a snap ring groove is provided on the outer peripheral side wall of the cylindrical section. The air connection component 18 is snap-connected to the circular hole on the static air exchange plate through a snap ring. A cylindrical accommodation cavity is formed inward from the lower surface of the flange section of the air connection component 18. The air connection compression valve core 17 and the air connection component 18 are fixedly connected and cover the accommodation cavity. The air connection compression valve core 17 is an annular plate-shaped component. The diameter of the central circular hole on the air connection compression valve core 17 is smaller than the diameter of the accommodation cavity, and the axis of the circular hole on the air connection compression valve core 17 is coaxially arranged with the axis of the accommodation cavity. The air connection valve core 20 includes a large cylindrical section and a small cylindrical section connected in sequence. The air connection valve core 20 is arranged in the accommodation cavity. A valve core compression spring 21 is provided between one end surface of the large cylindrical section of the air connection valve core 20 and the bottom of the accommodation cavity. The two ends of the valve core compression spring 21 respectively abut against the bottom of the accommodation cavity and the end surface of the large cylindrical section of the air connection valve core 20. The other end of the air connection valve core 20, that is, the small cylindrical section, penetrates the air connection compression valve core 17 and is slidably connected thereto.

[0041] In a specific embodiment, as Figure 4 and Figure 5 shown, a plurality of guide posts are threadedly connected to the flange section of the air connection component 18. Buffer springs 19 are sleeved on the guide posts. One end of the buffer spring 19 abuts against the upper surface of the flange of the air connection component 18, and the other end of the buffer spring 19 abuts against the lower surface of the static air exchange plate, thereby realizing the buffering effect of fixing the upper air exchange component 9 on the static air exchange plate and reducing the collision wear generated when the upper air exchange component 9 is repeatedly abutted by the lower air exchange component 8.

[0042] In a specific embodiment, as Figure 4 and Figure 5 shown, the lower air exchange component 8 includes: an air connection top core 14, an air connection top core pressing ring 15, and an O-ring 16. The air connection top core 14 is of a rotary body structure. A flange is integrally formed on the outer peripheral side wall at the middle position of the cylindrical section of the air connection top core 14. A columnar protrusion is provided on the upper surface of the air connection top core 14. The air connection top core pressing ring 15 is an annular plate-like component. The air connection top core pressing ring 15 is sleeved on the columnar protrusion and fixedly connected to the air connection top core 14. For example, the air connection top core pressing ring 15 and the air connection top core 14 can be connected by bolts. The O-ring 16 is sleeved on the top of the columnar protrusion located above the flange of the air connection top core 14. When the upper surface of the air connection top core pressing ring 15 abuts against the lower surface of the air connection compression valve core 17, the air connection top core 14 presses the air connection valve core 20 into it, and the lower air exchange component 8 and the upper air exchange component 9 are conducted. At this time, the O-ring 16 abuts against the lower surface of the air connection compression valve core 17, avoiding air leakage. Gas will not enter the vacuum environment and will not damage the vacuum environment. AsFigure 2 As shown in Figure 2 , the dynamic ventilation component 2 includes a dynamic ventilation plate, which can be a rectangular plate-shaped part. At least two lower ventilation parts 8 are arranged through the dynamic ventilation plate. For example, two lower ventilation parts 8 are fixedly connected to the dynamic ventilation plate by bolts. The air-receiving top core 14 of the lower ventilation part 8 is arranged upward, and the air-receiving valve core 20 of the upper ventilation part 9 is directly opposite to the air-receiving top core 14 and is arranged downward; both the air-receiving top core 14 and the air-receiving part 18 are fixedly provided with trachea connectors 13, and the trachea connectors 13 are used for connecting with pipelines.

[0043] In the above specific embodiment, the working process of the upper ventilation part 9 and the lower ventilation part 8 cooperating for ventilation is as follows: When the ventilation box body 26 in the external vacuum box body 23 needs ventilation, the lower ventilation part 8 rises with the dynamic ventilation plate under the action of the lifting body transmission component 3 until the air-receiving top core 14 presses on the air-receiving valve core 20. At this time, the valve core compression spring 21 contracts, and the air-receiving valve core 20 opens. At this time, the air in the trachea of the lower ventilation part 8 enters or exits, and the gas enters or exits the ventilation box body 26 through the upper air-receiving part 18; When the ventilation ends, the lower ventilation part 8 descends with the dynamic ventilation plate under the action of the lifting body transmission component 3, and the air-receiving top core 14 pressing on the air-receiving valve core 20 separates from the air-receiving valve core 20. At this time, the valve core compression spring 21 expands, and the air-receiving valve core 20 returns to the initial position, and the air-receiving valve core 20 closes to stop ventilation.

[0044] In a specific embodiment, it further includes a ventilation plate fixing column 11. The ventilation plate fixing column 11 is a cylinder. One end of the ventilation plate fixing column 11 is fixed on the static ventilation plate. A flange plate is arranged at the upper end of the ventilation plate fixing column 11. Multiple round holes can be opened on the flange plate at the upper end of the ventilation plate fixing column 11. The end of the ventilation plate fixing column 11 provided with the flange plate is fixedly connected to the inside of the external vacuum box 23 by bolts; It further includes multiple columns 12, and multiple columns 12 are fixed on the upper surface of the static ventilation plate. For example, the columns 12 can be four aluminum cylinders. To avoid generating electric sparks between the columns 12, a silica gel sleeve 10 is sleeved on the outer peripheral side of each column 12. By setting the columns 12, the fixing stability of the static ventilation plate is improved.

[0045] The beneficial effects in this embodiment are as follows: Through the action of the lower air-receiving part 18 lifting and pressing the air-receiving valve core 20 to open the valve core, a spring is used to close the valve core to ensure internal sealing, and an O-ring 16 is used between the two air-receiving parts 18 to avoid damaging the seal; The purpose of ventilating the box body is achieved without destroying the vacuum environment, ensuring the production rate, the mechanism design is light, and the stability of the equipment is ensured; By setting the buffer spring 19, it is ensured that the vacuum environment in the box body is not damaged.

[0046] Embodiment 3

[0047] This embodiment includes all the technical features of Embodiment 2. On this basis, as Figures 6 to 8As shown, the lifting body transmission assembly 3 includes: a transmission shaft 4, a fixed seat 7, a lifting block 5 and an eccentric wheel 6; the transmission shaft 4 passes through the outer vacuum box 23; one end of the transmission shaft 4 located in the outer vacuum box 23 is fixedly connected to the eccentric wheel 6, and the lifting block 5 is sleeved on the outer peripheral side of the eccentric wheel 6, the fixed seat 7 is fixed in the body of the outer vacuum box 23, and a groove is opened on the fixed seat 7. The lifting block 5 is arranged in the groove and is slidably connected to the fixed seat 7; the transmission shaft 4 is rotationally connected to the outer vacuum box 23 through the magnetic fluid 27.

[0048] Specifically, the transmission shaft 4 is fixed to the servo motor 22 through a universal joint coupling. The transmission shaft 4 is a cylindrical shaft. The transmission shaft 4 and the eccentric wheel 6 are fixed together through overfitting and key connection. The lifting block 5 can be a square block structure. A square hole is opened on the lifting block 5. The square hole is sleeved on the outer peripheral side of the eccentric wheel 6. The two sides of the eccentric shaft on the transmission shaft 4 are rotatably connected through bearings and fixed seats 7. The fixed seats 7 are fixed in the outer vacuum box 23 by bolts.

[0049] like Figure 6 As shown, the working process of this embodiment is that the servo motor 22 rotates, and the power is transmitted through the transmission shaft 4 to drive the eccentric wheel 6 to rotate. The eccentric action of the eccentric wheel 6 drives the lifting block 5 to reciprocate up and down on the fixed seat 7, and the dynamic ventilation component 2 fixed on the lifting block 5 reciprocates up and down accordingly. When the dynamic ventilation component 2 moves upward to cooperate with the static ventilation component 1, the two lower ventilation parts 8 are respectively connected with the two upper ventilation parts 9, one group of the lower ventilation parts 8 passes the gas through the upper ventilation parts 9 and then discharges it into the ventilation box 26 through the air inlet pipe 24, and the other group of upper ventilation parts 9 passes the gas through the lower ventilation parts 8 and then discharges it from the ventilation box 26 through the air outlet pipe 25; when the ventilation is completed, the dynamic ventilation component 2 moves downward with the lifting block 5, gradually away from the static ventilation component 1, the lower ventilation parts 8 and the upper ventilation parts 9 are separated, the valve core is closed, and the ventilation is completed.

[0050] The beneficial effects of this embodiment are: the servo motor 22 drives the eccentric wheel 6 to rotate smoothly and accurately, ensuring that it can hit the valve core every time. The eccentric wheel 6 saves design costs compared to the cam, and the air connecting piece 18 is small and sensitive, saving space to the maximum extent. Through the setting of the magnetic fluid 27, the transmission shaft 4 does not affect the vacuum environment inside the outer vacuum box 23 during rotation, and has good sealing.

[0051] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

[0052] Terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships, without substantial changes in the technical content, should also be regarded as the scope of implementation of the present invention.

Claims

1. An air exchange mechanism inside a box under a vacuum environment, Characterized in that, Comprising: Static ventilation component (1), dynamic ventilation component (2) and lifting body transmission component (3); the static ventilation component (1) is fixedly arranged in the outer vacuum box (23); the lifting body transmission component penetrates through the outer vacuum box (23); one end of the lifting body transmission component located in the outer vacuum box (23) is connected to the dynamic ventilation component (2) to push the dynamic ventilation component (2) to move towards or away from the static ventilation component (1); at least two upper ventilation parts (9) are arranged on the static ventilation component (1), and at least two of the upper ventilation parts (9) are communicated with the ventilation box body (26); at least two lower ventilation parts (8) are arranged on the dynamic ventilation component (2), and at least two of the lower ventilation parts (8) are communicated with an external air source; when the dynamic ventilation component (2) moves to abut against the static ventilation component (1), at least two of the lower ventilation parts (8) are respectively in one-to-one conduction with at least two of the upper ventilation parts (9) to realize gas exchange between the external air source and the ventilation box body (26). The static ventilation component (1) includes a static ventilation plate, and at least two of the upper ventilation parts (9) are fixedly arranged through the static ventilation plate. The upper ventilation part (9) includes: an air intake pressing valve core (17), an air intake part (18), an air intake valve core (20) and a valve core compression spring (21); the air intake part (18) is fixedly arranged through the static ventilation plate; a columnar accommodation cavity is formed in the air intake part (18), the air intake pressing valve core (17) is fixedly connected to the air intake part (18) and covers the accommodation cavity; the air intake valve core (20) is arranged in the accommodation cavity, a valve core compression spring (21) is arranged between one end of the air intake valve core (20) and the bottom of the accommodation cavity, and the other end of the air intake valve core (20) penetrates through the air intake pressing valve core (17) and is slidably connected thereto. The lower ventilation part (8) includes: an air intake top core (14), an air intake top core pressing ring (15) and an O-ring (16); a columnar protrusion is arranged on the upper surface of the air intake top core (14), the air intake top core pressing ring (15) is sleeved on the columnar protrusion and fixedly connected to the air intake top core (14), and the O-ring (16) is sleeved on the top end of the columnar protrusion; when the upper surface of the air intake top core pressing ring (15) abuts against the lower surface of the air intake pressing valve core (17), the air intake top core (14) presses the air intake valve core (20) into it, and the lower ventilation part (8) and the upper ventilation part (9) are conducted. The dynamic ventilation component (2) includes a dynamic ventilation plate, at least two lower ventilation parts (8) are arranged through the dynamic ventilation plate, the lower surface of the dynamic ventilation plate is connected to one end of the lifting body transmission component (3), and the lifting body transmission component (3) includes: a transmission shaft (4), a fixed seat (7), a lifting block (5) and an eccentric wheel (6); the transmission shaft (4) penetrates through the outer vacuum box (23);One end of the transmission shaft (4) located inside the outer vacuum chamber (23) is fixedly connected with an eccentric wheel (6). An elevating block (5) is sleeved on the outer peripheral side of the eccentric wheel (6). The fixed seat (7) is fixed inside the outer vacuum chamber (23). A groove is formed in the fixed seat (7). The elevating block (5) is arranged in the groove and is slidably connected with the fixed seat (7).; 2. The air exchange mechanism inside a box under a vacuum environment according to claim 1, Characterized in that, It further includes a buffer spring (19). A flange parallel to the lower surface of the static air exchange plate is provided on the air connection part (18). The two ends of the buffer spring (19) are respectively abutted against the lower surface of the static air exchange plate and the upper surface of the flange.

3. The air exchange mechanism inside a box under a vacuum environment according to claim 1, Characterized in that, The transmission shaft (4) is rotationally connected to the outer vacuum box (23) through a magnetic fluid (27).

4. The air exchange mechanism inside a box under a vacuum environment according to claim 1, Characterized in that, It further includes an air exchange fixing column. One end of the air exchange fixing column (11) is fixed on the static air exchange plate, and the other end of the air exchange fixing column (11) is fixed inside the outer vacuum box (23).

5. The air exchange mechanism inside a box under a vacuum environment according to claim 1, Characterized in that, It further includes multiple upright columns (12). The multiple upright columns (12) are fixed on the upper surface of the static air exchange plate, and a silica gel sleeve (10) is sleeved on the outer peripheral side of each upright column (12).

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