Ventilation skylight

Abstract

The invention relates to the technical field of skylights, in particular to a ventilating skylight. In order to solve the problem that rain and dust enter during window opening, the ventilation skylight comprises a bottom frame base, an inner frame base is fixedly connected to the upper end of the bottom frame base, the bottom frame base and the inner frame base form a window opening, a vertical base is fixedly connected to the inner frame base, a vertical straight notch is formed in the vertical base, the inner frame base is sleeved with an opening sash, and the opening sash and the bottom frame base are matched to seal the window opening. A cylinder inserted into the straight notch is fixed to the opening sash, the opening sash further comprises a lifting mechanism driving the opening sash to ascend and descend, and after the opening sash ascends, an air channel for communicating the window is formed. Rainwater or dust entering a room is reduced in a vertical opening state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of skylights, and more particularly to a ventilating skylight. BACKGROUND

[0002] Most of the existing ventilating skylights adopt horizontal push-pull type or inclined flip type opening structure, and the air duct formed between the window sash and the window frame after opening has no effective interception. In rainy days, rainwater is easy to directly enter the indoor through the air duct without any obstruction, especially in the scene of heavy rain or accompanied by lateral wind, the water inlet phenomenon is more serious. On the other hand, in windy weather, the outdoor dust is easy to enter the indoor through the gap for a long time of opening window ventilation. Finally, the ventilation volume of most products only depends on single rotation opening or push-pull opening, and the opening range cannot be controlled. SUMMARY

[0003] The present application provides a ventilating skylight, which aims to reduce the rainwater or dust entering the house in the vertical opening state.

[0004] The above-mentioned purpose is realized by the following technical scheme:

[0005] A ventilating skylight, comprising a bottom frame seat, an inner frame seat is fixedly connected to the upper end of the bottom frame seat, the bottom frame seat and the inner frame seat form a window, a vertical straight slot is arranged on a vertical stand fixedly connected to the inner frame seat, an opening sash is sleeved on the inner frame seat, the opening sash and the bottom frame seat can close the window, a cylinder inserted into the straight slot is fixed on the opening sash, and a lifting mechanism for driving the opening sash to lift is further included, and the opening sash forms an air duct for the window after being lifted.

[0006] The inner frame seat comprises a first frame table fixed to the bottom frame seat and a second frame table fixed to the upper end of the first frame table, and the first frame table and the second frame table form a ladder towards the window.

[0007] The upper end of the first frame table forms a chamfered surface.

[0008] The lower end surface of the opening sash is attached to the upper end surface of the bottom frame seat, or the inner end surface of the opening sash is attached to the outer wall surface of the first frame table, so as to close the window.

[0009] The lifting mechanism comprises an electric telescopic cylinder fixed to the bottom frame seat, a first track piece is fixed to the telescopic end of the electric telescopic cylinder, and a second track piece is installed on the inner wall of the opening sash, so that when the electric telescopic cylinder is elongated, the first track piece can push and lift the second track piece, and the second track piece drives the opening sash to lift.

[0010] The elongation direction of the electric telescopic cylinder is perpendicular to the axis of the cylinder.

[0011] The vertical protruding column is fixed on the seat and located in the straight slot, and the cylinder is inserted into the protruding column, and when the cylinder is in the highest position, the cylinder is separated from the protruding column. The limiting protruding piece is fixed on the bottom frame seat, and the clamping body is fixed on the second track piece. When the window is closed, the upper end surface of the clamping body abuts against the limiting protruding piece, and the lower end surfaces of the second track piece and the clamping body are inclined and gradually increase in the direction close to the electric telescopic cylinder. The first track piece is in surface contact with the second track piece. The inner wall of the opening fan is fixed with a guide rail, and the second track piece is slidingly connected to the guide rail, so that the second track piece can move horizontally along the telescopic direction of the electric telescopic cylinder. The inner wall of the opening fan is fixed with a protruding seat, and the guide column is fixed on the second track piece and slidingly connected to the protruding seat. Two limiting portions are fixed on the guide column, and the protruding seat is located between the two limiting portions. A spring is sleeved on the guide column, and the spring provides a force for separating the protruding seat from the second track piece. When the electric telescopic cylinder is elongated, the upper end surface of the clamping body abuts against the limiting protruding piece, and when the electric telescopic cylinder is elongated, the limiting portion on the side close to the electric telescopic cylinder abuts against the protruding seat, the clamping body is separated from the limiting protruding piece.

[0012] The edge of the limiting protruding piece towards the clamping body is provided with a first inner reverse surface, and the edge of the clamping body towards the limiting protruding piece is provided with a second inner reverse surface.

[0013] The side of the opening fan away from the cylinder is fixed with a lifting ring.

[0014] The ventilating skylight has the following beneficial effects:

[0015] The opening fan adopts a vertical lifting opening mode and is in a "cover buckle" state after being lifted. The inner frame seat is designed as a stepped structure composed of a first frame table and a second frame table, and a chamfer surface is arranged at the transition from the first frame table to the second frame table.

[0016] When the air duct is formed, the stepped structure and the chamfer surface of the inner frame seat form a natural "protruding interception barrier". After the rainwater enters the air duct along with the airflow, it is blocked by the steps and guided along the chamfer surface to the outside, and cannot directly penetrate into the room. In windy weather, the cover buckle structure in combination with the stepped structure can also reduce the amount of dust entering the room through the air duct.

[0017] The vertical height of the opening fan is adjusted by the lifting mechanism, such as the electric telescopic cylinder combined with the double track pieces. During the process from "adhesion to the bottom frame seat" to "lifting to the height of the second frame table", the distance between the opening fan and the chamfer surface of the inner frame seat gradually increases. The change in distance directly realizes the "gradual adjustment" of the size of the air duct. When the height is low, a "micro-ventilation air duct" is formed, meeting the small air exchange demand in spring and autumn; when the height is large, a "maximum air duct" is formed, realizing high-temperature strong ventilation in summer.

[0018] In the closed state of one of the product configurations, the lower end face of the opening fan is attached to the upper end face of the bottom frame seat, and the inner end face of the opening fan can be attached to the outer wall face of the first frame table. Cooperate with the second embodiment of the lifting mechanism to form a "up and down + inside and outside" double sealing; any configuration can also use EPDM material sealing rubber strip, which can further reduce the risk of air and rain leakage, and is suitable for scenes with high sealing requirements.

[0019] The reset assembly composed of the limiting convex piece, the clamping body, the spring and the limiting part realizes the locking effect of the opening fan, ensuring the safety performance.

[0020] In one of the product configurations, the water immersion sensor can be arranged in the distance area between the bottom frame seat and the inner frame seat, and the sensor and the electric telescopic cylinder are connected through the hub gateway. When detecting rainwater, the signal is transmitted to the intelligent module of the electric telescopic cylinder in real time, driving the telescopic cylinder to shorten and realizing the automatic closing of the opening fan, avoiding indoor water in rainy days.

[0021] The above distance area can also integrate a solar module, which can directly power the water immersion sensor, the electric telescopic cylinder and the lamp strip, reducing the dependence on external power supply, especially suitable for scenes without convenient external power supply on the roof, meeting the green building energy-saving demand.

[0022] If the detachable screen is connected by magic tape, the magic tape fluff surface at the upper and lower ends of the screen is attached to the magic tape thorn surface around the bottom frame seat and the opening fan, respectively. The screen is arranged around the air duct and completely deviated from the tempered glass area of the opening fan to avoid the screen blocking the light and improve the indoor light transmittance; when disassembled, only the magic tape needs to be separated, which is convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural diagram of a ventilation skylight;

[0024] Figure 2 is Figure 1 is an enlarged view of A in the middle;

[0025] Figure 3 is a structural diagram of the bottom frame seat;

[0026] Figure 4 is Figure 3 is an enlarged view of B in the middle;

[0027] Figure 5 is a close-up view of the stand and the limiting convex piece;

[0028] Figure 6 is Figure 5 is an enlarged view of C in the middle;

[0029] Figure 7 is Figure 5 is an enlarged view of D in the middle;

[0030] Figure 8 is a structural diagram of the opening fan;

[0031] Figure 9 is a structural diagram of the second track piece;

[0032] Figure 10 is a schematic diagram of the opening fan vertically raised to the maximum height;

[0033] Figure 11 is Figure 10 is an enlarged view at E in FIG. 4;

[0034] Figure 12 is a schematic diagram of the opening fan with an acute angle of rotation range.

[0035] In the figure: 1-1, bottom frame seat; 1-2, inner frame seat; 1-2-1, first frame platform; 1-2-2, second frame platform; 1-3, vertical seat; 1-4, convex column; 1-7, limiting convex piece; 1-7-1, first inner reverse surface; 1-8, panel; 2-1, opening fan; 2-2, cylinder; 2-3, guide rail; 2-4, convex seat; 3-1, electric telescopic cylinder; 3-2, first track piece; 4-1, second track piece; 4-2, clamping body; 4-2-1, second inner reverse surface; 4-3, guide column; 4-4, limiting part; 4-5, spring. DETAILED DESCRIPTION

[0036] A ventilation skylight, referring to Figure 1 , 3 , 4 and 5, comprising a bottom frame seat 1-1, the upper end of the bottom frame seat 1-1 is fixedly connected or integrally connected with an inner frame seat 1-2, and the inner frame seat 1-2 as a whole is a stepped structure or the outer wall surface thereof is inclined towards the center when facing upwards. For example, the inner frame seat 1-2 comprises a first frame platform 1-2-1 fixed on the bottom frame seat 1-1 and a second frame platform 1-2-2 fixed on the upper end of the first frame platform 1-2-1, and the first frame platform 1-2-1 and the second frame platform 1-2-2 form a step towards the window. The inner wall surfaces of the bottom frame seat 1-1 and the inner frame seat 1-2 are in abutment and coincidence, and a hollow area forms a window.

[0037] Referring to Figure 6 and 8 , each of the left and right ends of the front side of the inner frame seat 1-2 is fixedly connected with a vertical straight slot 1-3. An opening fan 2-1 is sleeved on the inner frame seat 1-2 and sits on the bottom frame seat 1-1. The opening fan 2-1 comprises an alloy window frame, the top of the alloy window frame is a tempered glass area, and the bottom of the tempered glass is spaced apart from the bottom of the alloy window frame to form a groove. When the lower end surface of the opening fan 2-1 is in abutment with the upper end surface of the bottom frame seat 1-1, the window is closed, and the upper end outer peripheral edge of the first frame platform 1-2-1 forms a chamfered surface, or the first frame platform 1-2-1 excessively forms a chamfered surface to the second frame platform 1-2-2.

[0038] The height of the opening fan 2-1 is adjusted by lifting the opening fan 2-1 through the lifting mechanism. When the opening fan 2-1 is higher than the vertical outer wall surface of the first frame 1-2-1 after being lifted, it is in a chamfered surface state, and there is a gap between the opening fan 2-1 and the chamfered surface, thereby forming an air duct. When the area where the chamfered surface is located is continuously lifted, the gap gradually increases, and the air duct gradually increases. When the opening fan 2-1 is at the height of the second frame 1-2-2, the gap reaches the maximum, and the size of the air duct reaches the maximum. At this time, the ventilation volume is the highest, and the maximum stroke of the straight opening mode is reached. This opening scheme can maintain the opening air duct in rainy days. When the air duct is opened, the opening fan 2-1 is in a clasp state, and the inner frame 1-2 serves as a protruding structure for interception in the air duct, making it difficult for rainwater to enter the house. In windy weather, dust can also be reduced from entering the house. At the same time, the improved screen is connected by using a magic tape connection scheme, so that the screen surrounds the opening fan 2-1 and the bottom frame 1-1. The screen can be offset from the glass to achieve the effect of no screen inside, and it is more transparent. When it is necessary to turn over the opening fan 2-1 to use the window to enter and exit furniture and home appliances, the magic tape burr surface and the reverse burr surface can be separated. The magic tape burr surface can be fixed around the bottom frame 1-1 and the opening fan 2-1, and the upper and lower ends of the screen are fixed with the magic tape burr surface. The upper and lower layers of the magic tape burr surface are respectively attached to the two magic tape burr surfaces.

[0039] A cylindrical column 2-2 is fixed on each of the left and right ends of the inner wall of the opening fan 2-1, and the two cylindrical columns 2-2 are inserted into the two straight slots. The cylindrical column 2-2 can move vertically in the straight slot. A vertical protruding column 1-4 is fixed on the stand 1-3 and located in the straight slot. A circular hole is provided on the cylindrical column 2-2, which is slightly larger than the protruding column 1-4, so as to be inserted into the protruding column 1-4. When the cylindrical column 2-2 is on the protruding column 1-4, it can move vertically, which can assist the stability of the vertical longitudinal movement of the opening fan 2-1. The diameter of the circular hole can be 1-2 mm larger than the diameter of the cylindrical protruding column 1-4, and the edges of the circular hole and the protruding column 1-4 are polished to form a rounded surface, so as to facilitate the reinsertion and cooperation of the two. When the cylindrical column 2-2 is at the maximum height in the straight slot, the cylindrical column 2-2 is separated from the protruding column 1-4. At this time, the cylindrical column 2-2 can rotate around its own axis to drive the opening fan 2-1 to rotate around the axis of the cylindrical column 2-2, thereby realizing the rotating opening mode.

[0040] Embodiment one of the lifting mechanism: the base can be fixed on the roof or the bottom frame 1-1, such as a scissor lifting mechanism or a linear driver. The top of the scissor lifting mechanism or the top of the telescopic rod is attached to the bottom of the opening fan 2-1.

[0041] Embodiment 2 of the lifting mechanism: the base of the lifting mechanism cannot be installed on the bottom frame 1-1, but on the roof, so as to push the bottom edge of the opening sash 2-1, and the edge of the opening sash 2-1 protrudes horizontally from the edge of the bottom frame 1-1. The inner end face of the opening sash 2-1 can also be closed when it is attached to the outer wall face of the first frame 1-2-1, thereby forming a double closed window. However, the double closed solution requires the use of embodiment 2 of the lifting mechanism.

[0042] Embodiment 3 of the lifting mechanism: in combination with Figure 2 and 9 , the lifting mechanism includes an electric telescopic cylinder 3-1 fixed on the right side of the bottom frame 1-1, and the electric telescopic cylinder 3-1 is located outside the first frame 1-2-1. The telescopic direction of the electric telescopic cylinder 3-1 is the front-back direction, and a first track piece 3-2 is fixed on the telescopic end of the electric telescopic cylinder 3-1, and the upper end face of the first track piece 3-2 is a first inclined surface, and the height of the first inclined surface gradually decreases from front to back. It also includes a second track piece 4-1 installed on the opening sash 2-1, and the lower end face of the second track piece 4-1 is a second inclined surface, and the height of the second inclined surface gradually decreases from front to back, so that the contact between the first inclined surface and the second inclined surface is a surface contact. In this embodiment, there is a space between the inner wall of the opening sash 2-1 and the outer wall of the inner frame 1-2, and this area can be arranged with equipment, such as the panel 1-8 of the solar module, Figure 1 the square piece structure on the middle bottom frame 1-1. It can also be arranged with a water immersion sensor and a light strip. Among them, the solar module can power the sensor, the lifting mechanism or / and the light strip. When the water immersion sensor detects water, the signal is given to the intelligent module of the electric telescopic cylinder 3-1, so that the electric telescopic cylinder 3-1 shortens to close the opening sash 2-1. The water immersion sensor can transmit signals through networking with the hub gateway module together with the electric telescopic cylinder 3-1.

[0043] Further explanation, about the first embodiment of the installation of the second track piece 4-1:

[0044] The second track piece 4-1 is directly fixed on the inner wall of the opening sash 2-1, and when the electric telescopic cylinder 3-1 is extended, the first track piece 3-2 is driven to move backward, the first track piece 3-2 pushes the second track piece 4-1, so that the second track piece 4-1 moves upward, and the second track piece 4-1 drives the opening sash 2-1 to move upward to open the air duct.

[0045] About the second embodiment of the installation of the second track piece 4-1:

[0046] The inner wall of the opening fan 2-1 is fixedly connected with a guide rail 2-3, and the second track piece 4-1 is provided with a groove matched with the guide rail 2-3, so that the second track piece 4-1 is slidably connected to the guide rail 2-3, and the second track piece 4-1 can only slide forward and backward on the guide rail 2-3. The bottom frame seat 1-1 is fixedly connected with a limiting protrusion 1-7, and the left end of the second track piece 4-1 is fixedly connected with a clamping body 4-2. When the lower end of the opening fan 2-1 is attached to the bottom frame seat 1-1, or under the condition of relaxed window closure, the upper end surface of the clamping body 4-2 abuts against the lower end surface of the top of the limiting protrusion 1-7. The inner wall of the right side of the opening fan 2-1 is fixedly connected with a convex seat 2-4, the rear end of the second track piece 4-1 is fixedly connected with a guide column 4-3, the guide column 4-3 is slidably connected to the convex seat 2-4, two limiting portions 4-4 are fixedly connected to the guide column 4-3, the convex seat 2-4 is located between the two limiting portions 4-4, a spring 4-5 is sleeved on the guide column 4-3, the spring 4-5 provides a force for increasing the distance between the convex seat 2-4 and the second track piece 4-1, so that the upper end surface of the clamping body 4-2 on the second track piece 4-1 abuts against the limiting protrusion 1-7 before the electric telescopic cylinder 3-1 is stretched, and at this time, the limiting portion 4-4 located at the rear side abuts against the rear end surface of the convex seat 2-4. When the electric telescopic cylinder 3-1 is stretched, the second track piece 4-1 moves, the clamping body 4-2 is separated from the limiting protrusion 1-7, and the opening fan 2-1 can be opened. After the clamping body 4-2 is separated from the limiting protrusion 1-7, the electric telescopic cylinder 3-1 continues to be stretched, the first track piece 3-2 pushes the second track piece 4-1 to further move backward, the spring 4-5 is further compressed, and the limiting portion 4-4 located at the front side abuts against the front end surface of the convex seat 2-4, at this time, the second track piece 4-1 cannot move backward, the first track piece 3-2 pushes the second track piece 4-1 to rise, so that the opening fan 2-1 rises, and the air duct is opened. Among them, Figure 10 and 11The maximum height of the vertical lifting of the opening sash 2-1 is shown, at which time the cylinder 2-2 is separated from the convex column 1-4 to the top of the vertical seat 1-3 straight notch. At this time, the opening sash 2-1 can rotate counterclockwise around the axis of the cylinder 2-2, thereby opening the window in a rotating scheme. This scheme can be combined with the fixed ring on the back side of the opening sash 2-1, and the electric motor rope puller on the roof is assumed to be higher than the opening sash 2-1. The motor drives the cylinder to rotate, one end of the rope fixed on the cylinder, and the other end of the rope fixed on the ring. The opening sash 2-1 is rotated by winding the rope and pulling the ring. However, it should be noted that if the opening sash 2-1 needs to rotate more than an acute angle, the bottom frame seat 1-1 should be raised near the window area during construction, so that the bottom frame seat 1-1 is suspended. When the opening sash 2-1 reaches the lowest height, it no longer rests on the upper end surface of the bottom frame seat 1-1, but the size of the bottom frame seat 1-1 is reduced so that the outer wall surface of the bottom frame seat 1-1 fits the inner wall surface of the opening sash 2-1. The fitting scheme can be achieved by using sealing rubber strips fixed on both surfaces to cooperate with each other, and the rubber strip made of ethylene propylene diene rubber is preferred. If the rotation angle of the opening sash 2-1 is within the range of an acute angle, the hand can be inserted from the outside of the opening sash 2-1 to maintain the inside, or the hand can be inserted from the inside of the window to the opening sash 2-1. The bottom frame seat 1-1 can be larger than the opening sash 2-1 to seat the opening sash 2-1 on the bottom frame seat 1-1. Figure 12

[0047] The first inner chamfer 1-7-1 can be a chamfer surface or a circular arc surface, and the second inner chamfer 4-2-1 of the clamping body 4-2 has the same structure as the first inner chamfer 1-7-1. Since the lower end surface of the clamping body 4-2 is a front high and rear low inclined surface, when the opening sash 2-1 is lifted due to the opening of the air duct, the clamping body 4-2 is higher than the limiting convex piece 1-7, and as the opening sash 2-1 is contracted by the electric telescopic cylinder 3-1, the clamping body 4-2 falls under the weight of the opening sash 2-1, the inclined surface of the lower end surface of the clamping body 4-2 presses the top of the limiting convex piece 1-7, providing a component force for the rear movement of the clamping body 4-2, thereby further compressing the spring 4-5, and using the elastic force to keep the lower end surface of the clamping body 4-2 in contact with the first inner chamfer 1-7-1, until the clamping body 4-2 can be re-clamped at the lower end surface of the top of the limiting convex piece 1-7, and the reset is completed.​

Claims

1. A ventilation skylight, characterized in that, It includes a bottom frame base (1-1), an inner frame base (1-2) fixedly connected to the upper end of the bottom frame base (1-1), the bottom frame base (1-1) and the inner frame base (1-2) form a window, a stand (1-3) fixedly connected to the inner frame base (1-2), a vertical straight slot is provided on the stand (1-3), an opening fan (2-1) is fitted on the inner frame base (1-2), the opening fan (2-1) cooperates with the bottom frame base (1-1) to close the window, a cylinder (2-2) fixed on the opening fan (2-1) and inserted into the straight slot, and a lifting mechanism for driving the opening fan (2-1) to rise and fall, the opening fan (2-1) forms a duct for guiding the window after it rises.

2. The ventilation skylight according to claim 1, characterized in that, The inner frame base (1-2) includes a first frame platform (1-2-1) fixed on the bottom frame base (1-1) and a second frame platform (1-2-2) fixed on the upper end of the first frame platform (1-2-1). The first frame platform (1-2-1) and the second frame platform (1-2-2) form a step facing the window.

3. The ventilation skylight according to claim 2, characterized in that, The upper outer periphery of the first frame (1-2-1) forms a chamfered surface.

4. The ventilation skylight according to claim 2, characterized in that, The window can be closed when the lower end face of the opening fan (2-1) is attached to the upper end face of the bottom frame base (1-1), or when the inner end face of the opening fan (2-1) is attached to the outer wall of the first frame (1-2-1).

5. The ventilation skylight according to claim 1, characterized in that, The lifting mechanism includes an electric telescopic cylinder (3-1) fixed on the base frame (1-1). A first track member (3-2) is fixed to the telescopic end of the electric telescopic cylinder (3-1), and a second track member (4-1) is installed on the inner wall of the opening fan (2-1). When the electric telescopic cylinder (3-1) extends, the first track member (3-2) can push the second track member (4-1) to rise, and the second track member (4-1) drives the opening fan (2-1) to rise.

6. The ventilation skylight according to claim 5, characterized in that, The extension direction of the electric telescopic cylinder (3-1) is perpendicular to the axis of the cylinder (2-2).

7. The ventilation skylight according to claim 1 or 5, characterized in that, A vertical protrusion (1-4) located in a straight groove is fixed on the stand (1-3). A cylinder (2-2) is inserted into the protrusion (1-4). When the cylinder (2-2) is in the highest position, the cylinder (2-2) disengages from the protrusion (1-4).

8. The ventilation skylight according to claim 5, characterized in that, A limiting protrusion (1-7) is fixedly attached to the bottom frame (1-1), and a locking body (4-2) is fixedly attached to the second track member (4-1). When the window is closed, the upper end face of the locking body (4-2) abuts against the limiting protrusion (1-7). The lower end faces of the second track member (4-1) and the locking body (4-2) are inclined and gradually rise towards the electric telescopic cylinder (3-1). The first track member (3-2) contacts the second track member (4-1). A guide rail (2-3) is fixedly attached to the inner wall of the opening fan (2-1). The second track member (4-1) is slidably connected to the guide rail (2-3), so that the second track member (4-1) can move horizontally relative to the guide rail (2-3) along the telescopic direction of the electric telescopic cylinder (3-1). A protrusion is fixedly attached to the inner wall of the opening fan (2-1). 2-4), a guide post (4-3) is fixedly connected to the second track member (4-1). The guide post (4-3) is slidably connected to the boss (2-4). Two limiting parts (4-4) are fixedly connected to the guide post (4-3). The boss (2-4) is located between the two limiting parts (4-4). A spring (4-5) is sleeved on the guide post (4-3). The spring (4-5) provides the force to separate the boss (2-4) from the second track member (4-1), so that before the electric telescopic cylinder (3-1) extends, the upper end face of the locking body (4-2) is held against the limiting protrusion (1-7). When the electric telescopic cylinder (3-1) extends and the limiting part (4-4) near the electric telescopic cylinder (3-1) is held against the boss (2-4), the locking body (4-2) separates from the limiting protrusion (1-7).

9. The ventilation skylight according to claim 8, characterized in that, The edge of the limiting protrusion (1-7) facing the card body (4-2) is provided with a first inner chamfer (1-7-1), and the edge of the card body (4-2) facing the limiting protrusion (1-7) is provided with a second inner chamfer (4-2-1).

10. The ventilation skylight according to claim 1, characterized in that, A lifting ring is fixed to the side of the opening fan (2-1) away from the cylinder (2-2).

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