Shelter fresh air opening opening mechanism

Abstract

The invention discloses a shelter fresh air opening mechanism and relates to the technical field of mushroom cultivation equipment, the shelter fresh air opening mechanism comprises a shell, an opening and closing assembly, an air exchange assembly and a control terminal, the air exchange assembly comprises a supporting frame, a rotating shaft, a rotating seat, a sliding seat, blades and a rotating ring, and a through groove is formed in the side portion of the supporting frame; the rotating shaft is connected with the supporting frame in a rotating fit mode, the rotating seat is fixedly connected with the rotating shaft, a rotating hole is formed in the side portion of the rotating seat, the bottom of the blade is connected with the rotating hole in a rotating fit mode, the two sets of sliding seats and the two sets of rotating rings are arranged, the sliding seats are connected with the through grooves in a sliding fit mode, and rotating grooves are formed in the sliding seats. The rotating rings are connected with the corresponding rotating grooves in a rotating fit mode, and the two ends of the tops of the blades are connected with the corresponding rotating rings. The blade cut-in angle is changed by adjusting the distance between the rotating rings, the air inlet amount and the air flow speed can be controlled more finely, and the differentiated requirements of mushrooms and other crops for fresh air in different growth stages can be met.

Description

Technical Field

[0001] This invention relates to the technical field of mushroom cultivation equipment, specifically to a fresh air inlet opening mechanism for a mobile cabin. Background Technology

[0002] With the development of modern agriculture towards intensification and intelligentization, mushroom cultivation containers, as a type of closed cultivation platform with precisely regulated environment, have been widely used in the large-scale cultivation of crops such as shiitake mushrooms, enoki mushrooms, and king oyster mushrooms. Mushroom growth is highly dependent on the temperature and humidity inside the container, as well as C... Concentration and airflow velocity are extremely sensitive: during the mycelium growth stage, low-frequency, low-volume ventilation is required to maintain stable temperature and humidity and prevent the growth of unwanted microorganisms; during the fruiting stage, high-frequency, medium-volume ventilation is required to balance C Exhaust and fresh air supply are required; during the spore maturation period, extremely low wind speed ventilation is needed to prevent the spores from being blown away, resulting in yield loss or cross-contamination.

[0003] Existing technologies often adjust fan airflow simply by changing motor speed, failing to precisely control airflow velocity and total air volume. For example, some systems can only switch between three fixed fan speeds: "high," "medium," and "low," unable to accurately adjust according to the "extremely low wind speed" required during mushroom spore maturation or the "micro-airflow" needed during mycelial growth. This can easily lead to excessive wind speed scattering spores and reducing yield, or insufficient wind speed causing problems like C. The accumulation of bacteria and the resulting impact on the respiratory metabolism of mushrooms make it difficult to meet the ventilation needs throughout the entire growth cycle of mushrooms. Summary of the Invention

[0004] This invention provides a cabin air inlet opening mechanism that can solve the problem in the prior art that the fan air volume can only be adjusted by changing the motor speed, which cannot precisely control the airflow speed and the total amount of air intake.

[0005] A fresh air inlet opening mechanism for a mobile cabin includes a housing, opening and closing components, a ventilation component, and a control terminal. The housing has a fresh air inlet, an exhaust outlet, a return air inlet, and an outlet on its side. Multiple sets of opening and closing components are located at the ports of the fresh air inlet and the exhaust outlet, respectively, for controlling the opening and closing of these inlets and outlets. Both the opening and closing components and the ventilation component are electrically connected to the control terminal. Multiple sets of ventilation components are provided, each located within one of the fresh air inlet, exhaust outlet, and return air inlet. Each ventilation component includes a support frame, a rotating shaft, a rotating seat, and a sliding seat. The system comprises blades and rotating rings. A through groove is provided on the side of the support frame. The rotating shaft is rotatably connected to the support frame and located within the through groove. A rotating seat is fixedly connected to the rotating shaft. A rotating hole is provided on the side of the rotating seat. The bottom of the blade is rotatably connected to the rotating hole. Two sets of sliding seats and rotating rings are provided. The sliding seat is slidably connected to the through groove along the axial direction of the rotating shaft. The sliding seat has a rotating groove, and the rotating rings are rotatably connected to their corresponding rotating grooves. The top ends of the blades are connected to their corresponding rotating rings. The blade's air entry angle is adjusted by regulating the distance between the two sets of rotating rings.

[0006] According to one embodiment of the present invention, the ventilation assembly further includes an upper universal joint and a lower universal joint, a sliding hole is provided at the top of the blade, one end of the upper universal joint is slidably connected to the sliding hole, the other end of the upper universal joint is connected to one end of the lower universal joint, and the other end of the lower universal joint is fixedly connected to a swivel ring.

[0007] According to one embodiment of the present invention, the ventilation assembly further includes a spring disposed in a sliding hole, one end of the spring abutting against the bottom of the sliding hole, and the other end of the spring abutting against the upper part of the universal joint.

[0008] According to one embodiment of the present invention, the ventilation assembly further includes a screw, and a plurality of limiting grooves arranged in a circular array are provided on the inner side of the through groove. The screw is rotatably disposed in the corresponding limiting groove. Each set of sliding seats includes a plurality of limiting blocks. The limiting blocks are slidably connected to the corresponding limiting grooves. The rotating groove is located at the top of the limiting block. The side of the limiting block is provided with a screw hole that mates with the screw. The outer side of the screw is provided with two threaded segments arranged symmetrically and with opposite helical directions. The screw holes in the two sets of sliding seats mate with the corresponding threaded segments.

[0009] According to one embodiment of the present invention, the ventilation assembly further includes an adjusting motor, the adjusting motor being fixedly connected to the support frame, the output end of the adjusting motor being fixedly connected to the screw coaxially, and the adjusting motor being electrically connected to the control terminal.

[0010] According to one embodiment of the present invention, the opening and closing assembly includes a baffle and a sliding cover. The baffle is fixedly connected to the housing. The side of the baffle is provided with a plurality of ventilation slots arranged in a rectangular array. A plurality of sliding covers are provided and are respectively slidably disposed at the slot opening of the corresponding ventilation slot.

[0011] According to one embodiment of the present invention, the opening and closing assembly further includes a connecting rod and an electric push rod. A plurality of sliding covers and connecting rods are provided. The two ends of the connecting rods are respectively fixedly connected to the corresponding sliding covers. The electric push rod is fixedly connected to the baffle. The telescopic end of the electric push rod is fixedly connected to the sliding cover.

[0012] According to one embodiment of the present invention, the opening and closing assembly further includes a detection element disposed inside the cabin. Both the electric push rod and the detection element are electrically connected to a control terminal. The detection element includes a temperature sensor, a humidity sensor, and a C sensor. Concentration sensor.

[0013] According to one embodiment of the present invention, the ventilation assembly further includes a drive motor, the drive motor is fixedly connected to the support frame, the output end of the drive motor is fixedly connected to the rotating shaft coaxially, and the drive motor is electrically connected to the control terminal.

[0014] According to one embodiment of the present invention, the air exchange assembly further includes a filter screen, which is fixedly connected to the support frame and located at the opening of the through groove.

[0015] The advantages of this invention compared to the prior art are: By adjusting the swivel spacing to change the blade inclination angle, compared to traditional single wind speed adjustment methods, it can more precisely control the intake air volume and airflow velocity. This can meet the differentiated fresh air requirements of crops such as mushrooms at different growth stages, avoiding excessive wind speed that disperses spores or insufficient wind speed that leads to C... Stacking. The blades are supported at two points by the rotating seat and the rotating ring. The cooperation between the rotating shaft and the sliding seat ensures that the blades are subjected to balanced force during the adjustment process, reducing the risk of jamming or displacement. At the same time, multiple sets of air exchange components work independently and work together, and can be adjusted according to the different functions of the exhaust and return air inlets to improve the overall ventilation efficiency.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a three-dimensional structural diagram of a fresh air inlet opening mechanism for a mobile cabin.

[0018] Figure 2 This is a three-dimensional structural diagram of the shell in this invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the opening and closing component in this invention.

[0020] Figure 4 This is a three-dimensional structural diagram of the air exchange component in this invention.

[0021] Figure 5 This is a three-dimensional structural cross-sectional view of the air exchange component in this invention.

[0022] Figure 6 yes Figure 5 A magnified schematic diagram of the local structure at point A.

[0023] Figure 7 yes Figure 5 A magnified view of the local structure at point B.

[0024] Figure 8 This is a three-dimensional structural cross-sectional view of the opening and closing component in this invention.

[0025] The reference numerals in the figures include: 1. Housing; 2. Opening and closing assembly; 3. Air exchange assembly; 4. Exhaust vent; 5. Return air vent; 6. Outlet vent; 7. Support frame; 8. Rotating shaft; 9. Rotating seat; 10. Sliding seat; 11. Blade; 12. Rotary ring; 13. Rotating hole; 14. Rotating groove; 15. Upper part of universal joint; 16. Lower part of universal joint; 17. Sliding hole; 18. Spring; 19. Screw; 20. Limiting groove; 21. Limiting block; 22. Adjusting motor; 23. Baffle; 24. Sliding cover; 25. Ventilation slot; 26. Connecting rod; 27. Electric push rod; 28. Drive motor; 29. ​​Filter screen; 30. Fresh air inlet. Detailed Implementation

[0026] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0027] like Figures 1 to 8As shown, a fresh air inlet opening mechanism for a mobile cabin includes a housing 1, an opening and closing assembly 2, a ventilation assembly 3, and a control terminal. The housing 1 has a fresh air inlet 30, an exhaust outlet 4, a return air inlet 5, and an outlet 6 on its side. Multiple sets of the opening and closing assembly 2 are located at the ports of the fresh air inlet 30 and the exhaust outlet 4, respectively, and are used to control the opening and closing of these two inlets. Both the opening and closing assembly 2 and the ventilation assembly 3 are electrically connected to the control terminal. When it is necessary to adjust the air quality inside the mobile cabin, the control terminal first instructs the opening and closing assembly 2 to open or close the fresh air inlet 30 and the exhaust outlet 4 on the side of the housing 1, controlling whether outside air enters the ventilation path.

[0028] The ventilation assembly 3 includes a support frame 7, a rotating shaft 8, a rotating seat 9, a sliding seat 10, blades 11, and rotating rings 12. The support frame 7 has a through groove on its side. The rotating shaft 8 is rotatably connected to the support frame 7 and located within the through groove. The rotating seat 9 is fixedly connected to the rotating shaft 8. A rotating hole 13 is provided on the side of the rotating seat 9. The bottom of the blades 11 is rotatably connected to the rotating hole 13. Two sets of sliding seats 10 and rotating rings 12 are provided. The sliding seat 10 is slidably connected to the through groove along the axial direction of the rotating shaft 8. The sliding seat 10 has a rotating groove 14, and the rotating rings 12 are rotatably connected to their corresponding rotating grooves 14. The top ends of the blades 11 are connected to their corresponding rotating rings 12. When the distance between the two sets of rotating rings 12 along the axial direction of the rotating shaft 8 is adjusted, the rotating rings 12 rotate within the rotating grooves 14 of the sliding seat 10 and pull the blades 11, forcing the blades 11 to rotate around the bottom rotating hole 13, thereby changing the angle of entry of the blades 11 into the air. When the spacing of the rotating rings 12 increases, the unfolding angle of the blades 11 increases, and the air intake increases; when the spacing of the rotating rings 12 decreases, the closing angle of the blades 11 decreases, and the air intake decreases.

[0029] Multiple sets of air exchange components 3 act on the fresh air inlet 30, the exhaust air outlet 4 and the return air outlet 5 respectively. In conjunction with the opening and closing state of the opening and closing components 2, the fresh air volume and flow rate entering the cabin can be flexibly adjusted, and finally the dynamic balance of the cabin environmental parameters can be achieved.

[0030] By adjusting the spacing of the rotating ring 12 to change the cutting angle of the blade 11, compared with the traditional single wind speed adjustment method, the intake air volume and airflow speed can be controlled more precisely. This can meet the differentiated fresh air requirements of different growth stages of crops such as mushrooms, and avoid excessive wind speed blowing away spores or insufficient wind speed causing C Stacking. The blade 11 is supported at two points by the rotating seat 9 and the rotating ring 12. The cooperation between the rotating shaft 8 and the sliding seat 10 ensures that the blade 11 is subjected to balanced force during the adjustment process, reducing the risk of jamming or displacement. At the same time, multiple sets of air exchange components 3 work independently and work together, and can be adjusted according to the different functions of the exhaust port 4 and the return air port 5 to improve the overall ventilation efficiency.

[0031] According to one embodiment of the present invention, the ventilation assembly 3 further includes an upper universal joint 15 and a lower universal joint 16. A sliding hole 17 is provided at the top of the blade 11. One end of the upper universal joint 15 is slidably connected to the sliding hole 17, and the other end of the upper universal joint 15 is connected to one end of the lower universal joint 16. The other end of the lower universal joint 16 is fixedly connected to a rotating ring 12. When the distance between the two sets of rotating rings 12 is adjusted, the rotating ring 12 drives the upper universal joint 15 to move through the lower universal joint 16. While the upper universal joint 15 slides within the sliding hole 17 of the blade 11, it drives the blade 11 to rotate around the bottom rotating hole 13 to change the cutting angle. The presence of the universal joint can flexibly adapt to the angular deviation during the rotation of the blade 11, avoiding rigid pulling between components.

[0032] The universal joint structure can effectively solve the problem of component jamming caused by angle changes when adjusting the blade 11, and improve the flexibility and smoothness of blade 11 angle adjustment. Even after long-term high-frequency adjustment, it can still maintain a stable transmission effect. At the same time, the cooperation between the universal joint and the sliding hole 17 can buffer the impact force when adjusting the blade 11, reduce component wear, extend the service life of the ventilation assembly 3, and better meet the needs of long-term continuous operation of the mushroom container.

[0033] According to one embodiment of the present invention, the ventilation assembly 3 further includes a spring 18, which is disposed within a sliding hole 17. One end of the spring 18 abuts against the bottom of the sliding hole 17, and the other end of the spring 18 abuts against the upper part 15 of the universal joint. When the rotating ring 12 drives the upper part 15 of the universal joint to slide within the sliding hole 17, the spring 18 generates a corresponding elastic force according to the displacement of the upper part 15 of the universal joint: when the upper part 15 of the universal joint moves towards the bottom of the sliding hole 17, the spring 18 is compressed; when the upper part 15 of the universal joint moves towards the opening end of the sliding hole 17, the spring 18 relaxes. The elastic force of the spring 18 can buffer and reset the movement of the upper part 15 of the universal joint, helping the blades 11 to be stably maintained at the adjusted angle.

[0034] The buffering effect of spring 18 can effectively reduce the vibration of blade 11 during the adjustment process, avoid fluctuations in air intake caused by vibration, ensure a stable supply of fresh air in the chamber, and provide a stable environment for mushroom growth. At the same time, when external factors (such as airflow impact) cause blade 11 to have a slight tendency to deviate, the elasticity of spring 18 can push the upper part of universal joint 15 to reset, so that blade 11 is maintained at the set angle, reducing the frequency of manual secondary adjustment and reducing operation and maintenance costs.

[0035] According to one embodiment of the present invention, the ventilation assembly 3 further includes a screw 19. The inner side of the through groove is provided with a plurality of limiting grooves 20 arranged in a ring array. The screw 19 is rotatably disposed in the corresponding limiting groove 20. Each set of sliding seats 10 includes a plurality of limiting blocks 21. The limiting blocks 21 are slidably connected to the corresponding limiting grooves 20. The rotating groove 14 is located at the top of the limiting blocks 21. The side of the limiting blocks 21 is provided with a screw hole that mates with the screw 19. The outer side of the screw 19 is provided with two threaded segments arranged symmetrically and with opposite spiral directions. The screw holes in the two sets of sliding seats 10 respectively mate with the corresponding threaded segments.

[0036] When the screw 19 rotates, due to the opposite direction of the threaded sections, the limiting blocks 21 of the two sets of sliding seats 10 will move towards or away from each other along the axial direction of the screw 19, thereby causing the rotating ring 12 connected to the sliding seat 10 to change the spacing, ultimately achieving the adjustment of the cutting angle of the blade 11. The cooperation between the limiting groove 20 and the limiting block 21 can limit the rotation of the sliding seat 10, ensuring that it moves only along the axial direction.

[0037] The screw 19 drive features high precision, accurately controlling the spacing between the two sets of rotating rings 12, thus reducing the adjustment error of the blade 11 cutting angle and achieving refined control of the air intake volume to meet the stringent requirements of mushrooms for fresh air volume at different growth stages. The limiting groove 20 design of the annular array makes the sliding seat 10 more evenly stressed, avoiding deviation during adjustment and improving the stability of the ventilation assembly 3. At the same time, the screw 19 drive structure is compact, saving installation space of the ventilation assembly 3 within the housing 1.

[0038] According to one embodiment of the present invention, the ventilation assembly 3 further includes an adjusting motor 22, which is fixedly connected to the support frame 7. The output end of the adjusting motor 22 is fixedly connected to the screw 19 on the same axis, and the adjusting motor 22 is electrically connected to the control terminal.

[0039] When the control terminal receives environmental parameters inside the shelter (such as C) When a signal indicating that the concentration exceeds the standard requires adjustment of the air intake, a control command is sent to the regulating motor 22. The regulating motor 22 then drives the screw 19 to rotate forward or backward according to the command. The rotation of the screw 19 drives the sliding seat 10 to move, changing the spacing of the rotating ring 12, thereby adjusting the cutting angle of the blade 11 and realizing automatic adjustment of the air intake.

[0040] The regulating motor 22 enables the ventilation component 3 to automatically adjust the air intake volume without manual operation, reducing human intervention errors and improving the timeliness and accuracy of environmental control in the container. At the same time, the regulating motor 22 is linked with the control terminal, which can dynamically adjust the air intake volume according to the real-time environmental parameters inside the container, so that the environment inside the container is always kept within the suitable range for mushroom growth, which is conducive to improving mushroom yield and quality.

[0041] According to one embodiment of the present invention, the opening and closing assembly 2 includes a baffle 23 and a sliding cover 24. The baffle 23 is fixedly connected to the housing 1. The side of the baffle 23 is provided with a plurality of ventilation slots 25 arranged in a rectangular array. A plurality of sliding covers 24 are provided and are respectively slidably disposed at the slot opening of the corresponding ventilation slot 25.

[0042] When the fresh air inlet 30 or the exhaust outlet 4 needs to be opened, the sliding cover 24 slides along the opening of the ventilation slot 25, opening the ventilation slot 25, allowing outside air to enter the ventilation path through the ventilation slot 25; when the fresh air inlet 30 or the exhaust outlet 4 needs to be closed, the sliding cover 24 slides in the opposite direction, blocking the ventilation slot 25 and preventing outside air from entering. The rectangular array of ventilation slots 25 design allows air to enter evenly, avoiding excessive local airflow.

[0043] The combination structure of the baffle 23 and the sliding cover 24 is simple and reliable. The rectangular array arrangement of the ventilation slots 25 can ensure that the outside air is evenly distributed when it enters, avoiding local environmental fluctuations in the cabin due to concentrated airflow. The sliding opening and closing method of the sliding cover 24 saves installation space and has less noise during opening and closing, which will not interfere with the growth of mushrooms. At the same time, the sliding cover 24 and the ventilation slots 25 have a high degree of fit and good sealing when closed, which can effectively block outside air from entering the cabin.

[0044] According to one embodiment of the present invention, the opening and closing assembly 2 further includes a connecting rod 26 and an electric push rod 27. A plurality of sliding covers 24 and connecting rods 26 are provided. The two ends of the connecting rods 26 are respectively fixedly connected to the corresponding sliding covers 24. The electric push rod 27 is fixedly connected to the baffle 23. The telescopic end of the electric push rod 27 is fixedly connected to the sliding cover 24.

[0045] When the control terminal commands the fresh air inlet 30 or the exhaust vent 4 to close, the electric push rod 27 extends, pushing the connected sliding cover 24 to slide, and through the connecting rod 26, it drives other sliding covers 24 to slide synchronously, blocking all ventilation slots 25; when the command is to open the fresh air inlet 30 or the exhaust vent 4, the electric push rod 27 retracts, pulling the sliding cover 24 to slide in the opposite direction, and through the connecting rod 26, it drives all sliding covers 24 to open the ventilation slots 25 synchronously.

[0046] The connecting rod 26 enables the synchronous linkage of multiple sliding covers 24, ensuring that all ventilation slots 25 open or close simultaneously, avoiding uneven airflow at the fresh air inlet 30 or exhaust outlet 4 due to asynchronous movement of the sliding covers 24; the electric push rod 27 provides stable driving force, making the opening and closing of the sliding covers 24 smoother, and the electric push rod 27 is linked with the control terminal to realize the automated control of the opening and closing of the fresh air inlet 30 or exhaust outlet 4, reducing manual operation and improving the overall intelligence level of the cabin. At the same time, the electric push rod 27 has a long service life and low failure rate, reducing the maintenance cost of the opening and closing components 2.

[0047] According to one embodiment of the present invention, the opening and closing assembly 2 further includes a detection element disposed inside the cabin. Both the electric push rod 27 and the detection element are electrically connected to a control terminal. The detection element includes a temperature sensor, a humidity sensor, and a C sensor. Concentration sensor.

[0048] The testing equipment collects real-time data on temperature, humidity, and C inside the shelter. Concentration data is collected and transmitted to the control terminal. The control terminal compares the collected data with preset optimal growth parameters for mushrooms. When the data exceeds the preset range (e.g., C...),... When the concentration is too high, the control terminal instructs the electric push rod 27 to open the fresh air inlet 30 and the exhaust air outlet 4, thereby introducing fresh air and expelling old air; when the data returns to a suitable range, the electric push rod 27 is instructed to close the fresh air inlet 30 and the exhaust air outlet 4.

[0049] The detection device enables real-time monitoring of environmental parameters inside the cabin, providing accurate decision-making basis for the opening and closing of the fresh air inlet 30 and the exhaust outlet 4, avoiding the deterioration of the cabin environment due to untimely manual monitoring; the control terminal automatically controls the electric push rod 27 according to the detection data, realizing the adaptive adjustment of the opening and closing of the fresh air inlet 30 and the exhaust outlet 4, so that the environment inside the cabin is always stable within the suitable range for mushroom growth, greatly improving the accuracy and efficiency of environmental control, and helping to ensure the consistency of mushroom growth and quality stability.

[0050] According to one embodiment of the present invention, the ventilation assembly 3 further includes a drive motor 28, the drive motor 28 is fixedly connected to the support frame 7, the output end of the drive motor 28 is fixedly coaxially connected to the rotating shaft 8, and the drive motor 28 is electrically connected to the control terminal.

[0051] When the air exchange assembly 3 needs to operate, the control terminal sends a command to the drive motor 28. The drive motor 28 drives the rotating shaft 8 to rotate, and the rotating shaft 8 drives the rotating seat 9 fixed to it to rotate. The rotating seat 9 drives the blades 11 to rotate through the rotating hole 13. During the rotation of the blades 11, in conjunction with the cut-in angle adjusted by the rotating ring 12, fresh air from the outside or air inside the cabin can be delivered at a set flow rate to achieve air exchange.

[0052] According to one embodiment of the present invention, the ventilation assembly 3 further includes a filter screen 29, which is fixedly connected to the support frame 7 and located at the opening of the through slot. When air enters the ventilation assembly 3 through the through slot, it is first filtered by the filter screen 29. The filter screen 29 can block harmful substances such as dust, impurities, and microorganisms in the air, preventing these substances from entering the cabin with the air. As the usage time increases, impurities will accumulate on the filter screen 29. The filter screen 29 can be disassembled periodically for cleaning or replacement to ensure the filtration effect.

[0053] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A fresh air inlet opening mechanism for a mobile cabin, characterized in that, The device includes a housing (1), an opening and closing assembly (2), a ventilation assembly (3), and a control terminal. The housing (1) has a fresh air inlet (30), an exhaust air outlet (4), a return air outlet (5), and an air outlet (6) on its side. The ventilation assembly (3) is provided in multiple sets and is located in the fresh air inlet (30), the exhaust air outlet (4), and the return air outlet (5), respectively. The opening and closing assembly (2) is provided in multiple sets and is located at the ports of the fresh air inlet (30) and the exhaust air outlet (4), respectively. The opening and closing assembly (2) and the ventilation assembly (3) are both electrically connected to the control terminal.

2. The cabin fresh air inlet opening mechanism as described in claim 1, characterized in that, The ventilation assembly (3) includes a support frame (7), a rotating shaft (8), a rotating seat (9), a sliding seat (10), blades (11), and a rotating ring (12). The support frame (7) has a through groove on its side. The rotating shaft (8) is rotatably connected to the support frame (7). The rotating seat (9) is fixedly connected to the rotating shaft (8). The rotating seat (9) has a rotating hole (13) on its side. The bottom of the blade (11) is rotatably connected to the rotating hole (13). The sliding seat (10) and the rotating ring (12) are each provided in two sets. The sliding seat (10) is slidably connected to the through groove. The sliding seat (10) has a rotating groove (14). The rotating ring (12) is rotatably connected to the corresponding rotating groove (14). The top two ends of the blade (11) are connected to the corresponding rotating ring (12).

3. The cabin fresh air inlet opening mechanism as described in claim 2, characterized in that, The ventilation assembly (3) also includes an upper universal joint (15) and a lower universal joint (16). The top of the blade (11) is provided with a sliding hole (17). One end of the upper universal joint (15) is slidably connected to the sliding hole (17), and the other end of the upper universal joint (15) is connected to one end of the lower universal joint (16). The other end of the lower universal joint (16) is fixedly connected to the swivel ring (12).

4. The cabin fresh air inlet opening mechanism as described in claim 3, characterized in that, The ventilation assembly (3) also includes a spring (18), which is disposed in the sliding hole (17). One end of the spring (18) abuts against the bottom of the sliding hole (17), and the other end of the spring (18) abuts against the upper part (15) of the universal joint.

5. The cabin fresh air inlet opening mechanism as described in claim 2, characterized in that, The ventilation assembly (3) also includes a screw (19). The inner side of the through groove is provided with several limiting grooves (20) arranged in a ring array. The screw (19) is rotatably set in the corresponding limiting groove (20). Each set of sliding seats (10) includes several limiting blocks (21). The limiting blocks (21) are slidably connected to the corresponding limiting grooves (20). The rotating groove (14) is located at the top of the limiting block (21). The side of the limiting block (21) is provided with a screw hole that cooperates with the screw (19). The outer side of the screw (19) is provided with two threaded segments arranged symmetrically and with opposite spiral directions. The screw holes in the two sets of sliding seats (10) cooperate with the corresponding threaded segments.

6. The cabin fresh air inlet opening mechanism as described in claim 5, characterized in that, The ventilation assembly (3) also includes an adjustment motor (22), which is fixedly connected to the support frame (7). The output end of the adjustment motor (22) is fixedly connected to the screw (19) on the same axis. The adjustment motor (22) is electrically connected to the control terminal.

7. The cabin fresh air inlet opening mechanism as described in claim 1, characterized in that, The opening and closing assembly (2) includes a baffle (23) and a sliding cover (24). The baffle (23) is fixedly connected to the housing (1). The side of the baffle (23) is provided with a number of ventilation slots (25) arranged in a rectangular array. The sliding cover (24) is provided with a number of slots, which are slidably disposed at the slot openings of the corresponding ventilation slots (25).

8. The cabin fresh air inlet opening mechanism as described in claim 7, characterized in that, The opening and closing assembly (2) also includes a connecting rod (26) and an electric push rod (27). Several sliding covers (24) and connecting rods (26) are provided. The two ends of the connecting rod (26) are fixedly connected to the corresponding sliding covers (24). The electric push rod (27) is fixedly connected to the baffle (23). The telescopic end of the electric push rod (27) is fixedly connected to the sliding cover (24).

9. The cabin fresh air inlet opening mechanism as described in claim 8, characterized in that, The opening and closing assembly (2) also includes a detection element, which is installed inside the cabin. Both the electric push rod (27) and the detection element are electrically connected to the control terminal. The detection element includes a temperature sensor, a humidity sensor, and a C sensor. Concentration sensor.

10. The cabin fresh air inlet opening mechanism as described in claim 1, characterized in that, The ventilation assembly (3) also includes a drive motor (28) and a filter screen (29). The drive motor (28) is fixedly connected to the support frame (7). The output end of the drive motor (28) is fixedly connected to the rotating shaft (8) on the same axis. The drive motor (28) is electrically connected to the control terminal. The filter screen (29) is fixedly connected to the support frame (7) and is located at the opening of the through slot.

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