CN214739350U - Night ventilation energy-saving skylight structure capable of detecting meteorological parameters - Google Patents

Night ventilation energy-saving skylight structure capable of detecting meteorological parameters Download PDF

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Publication number
CN214739350U
CN214739350U CN202120794100.1U CN202120794100U CN214739350U CN 214739350 U CN214739350 U CN 214739350U CN 202120794100 U CN202120794100 U CN 202120794100U CN 214739350 U CN214739350 U CN 214739350U
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CN
China
Prior art keywords
fixedly connected
frame
plate
night
window
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Expired - Fee Related
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CN202120794100.1U
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Chinese (zh)
Inventor
胡浩威
康晓斌
王钦章
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Anhui Jianzhu University
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Anhui Jianzhu University
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Priority to CN202120794100.1U priority Critical patent/CN214739350U/en
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Publication of CN214739350U publication Critical patent/CN214739350U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a detectable meteorological parameter's energy-conserving skylight structure of ventilating night, including bottom plate, frame and roof, bottom plate one side rigid coupling frame front bottom, the positive top swing joint aggregate unit of frame, aggregate unit includes the server, server top surface rigid coupling frame back top, the positive rigid coupling pivot of server. Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses can realize the automation of the window that opens and shuts under aggregate unit's effect to detect outdoor meteorological parameter, when there is not rain night, carry out the heat transfer that ventilates, accessible ventilation reduction air conditioner energy consumption night in summer reaches energy-conserving effect, then usable night ventilates and improves indoor environment quality winter, simultaneously, can realize opening and shutting of shrink net when the window form that opens and shuts, realize both opening the net from this, avoid mosquito and flying bird to go into the room.

Description

Night ventilation energy-saving skylight structure capable of detecting meteorological parameters
Technical Field
The utility model relates to an energy-conserving door and window technical field specifically is an energy-conserving skylight structure of night ventilation of detectable meteorological parameter.
Background
In recent years, as building energy consumption increases year by year, energy saving standards are continuously improved. The green building design concept based on energy conservation and emission reduction is widely popularized and applied in engineering practice as an important building energy-saving technical measure. When the building is designed for energy conservation, standard requirements on lighting, ventilation and energy conservation are met, most building skylights cannot be opened, solar radiation, indoor heat sources and the like are stored in the building enclosure in a high proportion in summer and daytime, and hot air flows upwards when indoor temperature is high in summer. In view of this, night wind is used as a natural cold source, outdoor air with low temperature is introduced into a room, ventilation and precooling are carried out at night, and waste heat stored in the enclosure structure is taken away, so that the indoor hot and humid environment can be effectively improved, the building energy consumption of starting an air conditioner in summer can be reduced, the passive energy-saving method is a potential passive energy-saving means, and the indoor environment quality can be improved by utilizing night ventilation in winter. Therefore, when the design of the skylight of the building is considered, if the skylight can be opened and closed in a linkage manner, the skylight has the functions of ventilation and heat exchange, and simultaneously has the function of preventing birds and insects from entering after the skylight is opened. Meanwhile, in a building, no person stays at night to better utilize night ventilation technology, but the opening of a window needs personnel to control, and whether outdoor weather conditions are suitable for ventilation and precooling or not also becomes an obstacle to the application of the night ventilation technology of the building, so that the problem is solved by urgently needing a night ventilation energy-saving skylight structure capable of detecting meteorological parameters.
Therefore, a night ventilating energy-saving skylight structure capable of detecting meteorological parameters is provided for solving the problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a detectable meteorological parameter's energy-conserving skylight structure of ventilating night to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a night ventilation energy-saving skylight structure capable of detecting meteorological parameters comprises a bottom plate, a frame and a top plate, wherein one side of the bottom plate is fixedly connected with the bottom of the front side of the frame, the top of the front side of the frame is movably connected with a linkage device, the linkage device comprises a servo, the top surface of the servo is fixedly connected with the top of the back side of the frame, the front side of the servo is fixedly connected with a rotating shaft, the neck of the rotating shaft penetrates through the frame in a rotating mode, the tail end of the rotating shaft is fixedly connected with a driving gear, the driving gear is rotatably connected with a crawler, the other end of the crawler is rotatably connected with a driven gear, and the middle of the driven gear is rotatably connected with the front side of the frame; the top surface of the crawler is fixedly connected with a clamping block groove part, the edge of the bottom surface of the clamping block is fixedly connected with a long rod, the bottom end of the long rod is rotatably connected with the top end of the inner side of the opening and closing window, the top end of the other inner side of the opening and closing window is rotatably connected with a short rod, the top end of the short rod is fixedly connected with the edge of the bottom surface of the connecting block, and the top surface of the connecting block is fixedly connected with the bottom surface of the crawler;
the opening and closing window comprises an outer window and an inner window, wherein the outer window is symmetrically installed, the outer side of the outer window is hinged to one side of a plurality of shaft cores, the other side of each shaft core is hinged to the middle edge of a frame, the inner side of the outer window is hinged to one side of a hinge shaft, the other side of the hinge shaft is hinged to the inner window, the top end of the inner window is respectively connected with the bottom end of a long rod and the bottom end of a short rod in a rotating mode, the bottom of the inner window is fixedly connected with the top end of a roller component fixing part, the roller component roller part is connected with a rolling groove in a rolling mode, and the rolling groove is formed in the edge of the top surface of the bottom plate; the outer side of the inner window is hinged with two ends of a contraction net, the contraction net comprises a net sleeve, the left side of the net sleeve is hinged with the outer side of the inner window, a net plate is movably sleeved in a net sleeve cavity, and the right side of the net plate is hinged with the outer side of the inner window at the other side.
Preferably, the top surface of the server is connected with a fixed plate through a bolt, and the front surface of the fixed plate is fixedly connected with the back surface of the frame.
Preferably, the neck of the rotating shaft is sleeved with a bearing, and the outer ring of the bearing is embedded in the frame.
Preferably, the middle part of the driven gear is rotatably connected with a pin shaft, and the tail end of the pin shaft is fixedly connected with a frame.
Preferably, the top end of the inner window is symmetrically and fixedly connected with the bottom of the outer ring of the bearing ring, the inner ring of the bearing ring is connected with the bottom end of the long rod and the bottom end of the short rod in an interference fit manner, two sides of the middle parts of the long rod and the short rod are movably connected with the inner sides of the magnet strips, the outer sides of the magnet strips are fixedly connected with the pull net, the edge of the pull net is fixedly connected with the wall of a movable cavity, and the movable cavity is opened at the edge of the top plate; the neck parts of the long rod and the short rod movably penetrate through limiting grooves, the limiting grooves are longitudinally formed in the middle of the limiting plate, and the back face of the limiting plate is fixedly connected with a frame.
Preferably, the roller assembly comprises a connecting plate, a bearing on the top surface of the connecting plate is connected with the inner side of the bottom of the inner window, positioning plates are symmetrically and fixedly connected to two sides of the bottom surface of the connecting plate, a pin bolt is inserted in the middle of each positioning plate, the middle of each pin bolt is rotatably connected with a roller, and the bottom of each roller is in rolling contact with a rolling groove; the bolt is characterized in that two ends of the bolt are sleeved with limiting pads, the inner sides of the limiting pads are in clearance contact with the positioning plate, the outer sides of the limiting pads are in clearance contact with the bolts, and the bolts are movably inserted into the tail ends of the bolt.
Preferably, the left side of the net sleeve and the right side of the net plate are symmetrically hinged to one side of the twisted core, and the other side of the twisted core is symmetrically hinged to the outer side of the inner window.
Preferably, the middle part of the edge of the back side of the frame is fixedly connected with a controller, one part of the top surface of the top plate is fixedly connected with an air speed sensor, the other part of the top surface of the top plate is fixedly connected with a temperature sensor, and the top of the temperature sensor is fixedly connected with a humidity sensor; the controller, the wind speed sensor, the temperature sensor, the humidity sensor and the servo are connected through wires.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses can realize opening and shutting the automation of the window and carry out the heat transfer that ventilates night under aggregate unit's effect, accessible ventilation reduction air conditioner energy consumption night in summer reaches energy-conserving effect. In winter, night ventilation can be used to improve indoor environment quality. Meanwhile, the retractable net can be opened and closed when the window body is opened and closed, so that the net can be opened while the window is opened, and mosquitoes and flying birds are prevented from entering the room. Wherein, when starting the servo in the same direction as the needle and rotating, pivot and driving gear can rotate in step, and the track can rotate clockwise thereupon, and stock and quarter butt can separate to both ends this moment, under the linkage of bearing ring, the interior window is folded to the outside, and then under the articulated effect of hank core, pull out the otter board from the dictyosome. In addition, this use is novel can detect outdoor meteorological parameter condition through air velocity transducer, temperature sensor and humidity transducer to with data transmission for the controller, send switching signal by the controller to the server, need not artificial operation, it is more convenient to use.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a partial structure of the present invention;
FIG. 3 is a schematic view of the structure of the servo and the rotating shaft of the present invention;
FIG. 4 is an enlarged structural view of the structure at A in FIG. 1 according to the present invention;
fig. 5 is an enlarged structural diagram of the structure at B in fig. 2 according to the present invention.
In the figure: 1, a bottom plate, 2 frames, 3 top plates and 30 movable cavities; 4, linkage device: 40 servo machines, 400 fixing plates, 41 rotating shafts, 410 bearings, 42 driving gears, 43 tracks, 44 driven gears, 440 pin shafts, 45 clamping blocks, 46 long rods, 47 connecting blocks, 48 short rods and 49 bearing rings; 5, a limit plate and a limit groove 50; 6, opening and closing the window: 60 inner windows, 61 outer windows, 62 shaft cores and 63 articulated shafts; 7, roller assemblies: 70 connecting plates, 71 positioning plates, 72 bolts, 73 rollers, 74 limiting pads and 75 bolts; 8, rolling a groove; 9, shrinking the net: 90 mesh sleeves, 91 mesh plates and 92 twisted cores; 10 magnet strips, 11 hauling nets, 12 controllers, 13 wind speed sensors, 14 temperature sensors and 15 humidity sensors.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a night ventilation energy-saving skylight structure capable of detecting meteorological parameters comprises a bottom plate 1, a frame 2 and a top plate 3, wherein one side of the bottom plate 1 is fixedly connected with the bottom of the front side of the frame 2, the top of the front side of the frame 2 is movably connected with a linkage device 4, the linkage device 4 comprises a servo 40, the top surface of the servo 40 is fixedly connected with the top of the back side of the frame 2, the front side of the servo 40 is fixedly connected with a rotating shaft 41, the neck of the rotating shaft 41 is rotatably penetrated through the frame 2, the tail end of the rotating shaft 41 is fixedly connected with a driving gear 42, the driving gear 42 is rotatably connected with a crawler 43, the other end of the crawler 42 is rotatably connected with a driven gear 44, and the middle part of the driven gear 44 is rotatably connected with the front side of the frame 2; the top surface of the crawler belt 43 is fixedly connected with a groove part of a fixture block 45, the edge of the bottom surface of the fixture block 45 is fixedly connected with a long rod 46, the bottom end of the long rod 46 is rotatably connected with the top end of the inner side of the opening and closing window 6, the top end of the other inner side of the opening and closing window 6 is rotatably connected with a short rod 48, the top end of the short rod 48 is fixedly connected with the edge of the bottom surface of a connecting block 47, and the top surface of the connecting block 47 is fixedly connected with the bottom surface of the crawler belt 43;
the opening and closing window 6 comprises an outer window 61 and an inner window 60, the outer side of the symmetrical outer window 61 is hinged with one side of a plurality of shaft cores 62, the other side of each shaft core 62 is hinged with the middle edge of the frame 2, the inner side of the symmetrical outer window 61 is hinged with one side of a hinge shaft 63, the other side of the hinge shaft 63 is hinged with the symmetrical inner window 60, the top ends of the symmetrical inner windows 60 are respectively and rotatably connected with the bottom end of a long rod 46 and the bottom end of a short rod 48, the bottom of the symmetrical inner window 60 is fixedly connected with the top end of a fixing part of a roller component 7, the roller part of the roller component 7 is in rolling connection with a rolling groove 8, and the rolling groove 8 is opened at the edge of the top surface of the bottom plate 1; the outer sides of the symmetrical inner windows 60 are hinged with two ends of a contraction net 9, the contraction net 9 comprises a net sleeve 90, the left side of the net sleeve 90 is hinged with the outer side of the inner window 60, a net plate 91 is movably sleeved in a sleeve cavity of the net sleeve 90, and the right side of the net plate 91 is hinged with the outer side of the inner window 60 on the other side.
The top surface of the servo 40 is connected with a fixing plate 400 through bolts, and the front surface of the fixing plate 400 is fixedly connected with the back surface of the frame 2.
The neck of the rotating shaft 41 is sleeved with a bearing 410, and the outer ring of the bearing 410 is embedded in the frame 2.
The middle part of the driven gear 44 is rotatably connected with a pin shaft 440, and the tail end of the pin shaft 440 is fixedly connected with the frame 2.
The top ends of the symmetrical inner windows 60 are symmetrically and fixedly connected with the bottom of the outer ring of a bearing ring 49, the inner ring of the bearing ring 49 is connected with the bottom end of a long rod 46 and the bottom end of a short rod 48 in an interference fit manner, two sides of the middle parts of the long rod 46 and the short rod 48 are movably connected with the inner sides of magnet strips 10, the outer sides of the magnet strips 10 are fixedly connected with a pull net 11, the edge of the pull net 11 is fixedly connected with the wall of a movable cavity 30, and the movable cavity 30 is opened at the edge of a top plate 3; the neck parts of the long rod 46 and the short rod 48 movably penetrate through the limiting groove 50, the limiting groove 50 is longitudinally arranged in the middle of the limiting plate 5, and the back surface of the limiting plate 5 is fixedly connected with the frame 2. The magnet strips and the pull net 11 can ensure the horizontal movement of the long rods 46 and the short rods 48 and are also beneficial to preventing mosquitoes from entering the room from the movable cavity 30; the limiting groove 50 can control the bottom of the inner window 60 to move along the rolling groove 8.
The roller assembly 7 comprises a connecting plate 70, a bearing at the top surface of the connecting plate 70 is connected with the inner side of the bottom of the inner window 60, two sides of the bottom surface of the connecting plate 70 are symmetrically and fixedly connected with a positioning plate 71, a pin 72 is inserted in the middle of the positioning plate 71, the middle of the pin 72 is rotatably connected with a roller 73, and the bottom of the roller 73 is in rolling contact with the rolling groove 8; the two ends of the bolt 72 are sleeved with limit pads 74, the inner sides of the limit pads 74 are in clearance contact with the positioning plate 71, the outer sides of the limit pads 74 are in clearance contact with the bolt 75, and the bolt 75 is movably inserted at the tail ends of the bolt 72. The above structure facilitates movement of the inner window 60.
The left side of the net cover 90 and the right side of the net plate 91 are symmetrically hinged with one side of the twisted core 92, and the other side of the twisted core is hinged with the outer side of the inner window 60. The opening and closing of the window body and the opening and closing of the contraction net 9 can be synchronously realized.
The middle part of the edge of the back side of the frame 2 is fixedly connected with a controller 12, one part of the top surface of the top plate 2 is fixedly connected with an air speed sensor 13, the other part of the top surface of the top plate 2 is fixedly connected with a temperature sensor 14, and the top of the temperature sensor 14 is fixedly connected with a humidity sensor; the controller 12, the wind speed sensor 13, the temperature sensor 14, the humidity sensor 15 and the servo 40 are connected through wires.
The working principle is as follows: compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses can realize opening and shutting of window 6 under aggregate unit 4's effect, simultaneously, can realize opening and shutting of shrink net 9 in the window form that opens and shuts, realize both opening and shutting the net from this to avoid mosquito and flying bird to go into the room. When the servo 40 is started to rotate along the needle, the rotating shaft 41 and the driving gear 42 synchronously rotate, the caterpillar band 43 rotates clockwise, the long rod 46 and the short rod 48 are separated towards the two ends, the inner window 60 is folded outwards under the connection action of the bearing ring 49, and then the mesh plate 91 is pulled out of the mesh sleeve 90 under the hinging action of the twisting core 92; when the servo 40 is started to rotate anticlockwise, window closing can be achieved, and meanwhile the screen plate 91 is retracted into the screen sleeve 90. In addition, this use is novel can detect outdoor meteorological parameter condition through wind speed sensor 13, temperature sensor 14 and humidity transducer 15 to with data transmission for controller 12, send switching signal by controller 12 to servo 40, need not artificial operation, it is more convenient to use.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a detectable meteorological parameter's energy-conserving skylight structure of ventilating night, includes bottom plate (1), frame (2) and roof (3), bottom plate (1) one side rigid coupling frame (2) front bottom, frame (2) front top swing joint aggregate unit (4), its characterized in that: the linkage device (4) comprises a servo machine (40), the top surface of the servo machine (40) is fixedly connected with the top of the back surface of the frame (2), the front surface of the servo machine (40) is fixedly connected with a rotating shaft (41), the neck of the rotating shaft (41) rotates to penetrate through the frame (2), the tail end of the rotating shaft (41) is fixedly connected with a driving gear (42), the driving gear (42) is rotatably connected with a crawler belt (43), the other end of the crawler belt (43) is rotatably connected with a driven gear (44), and the middle part of the driven gear (44) is rotatably connected with the front surface of the frame (2); the top surface of the crawler belt (43) is fixedly connected with a groove part of a clamping block (45), the edge of the bottom surface of the clamping block (45) is fixedly connected with a long rod (46), the bottom end of the long rod (46) is rotatably connected with the top end of the inner side of the opening and closing window (6), the top end of the other inner side of the opening and closing window (6) is rotatably connected with a short rod (48), the top end of the short rod (48) is fixedly connected with the edge of the bottom surface of a connecting block (47), and the top surface of the connecting block (47) is fixedly connected with the bottom surface of the crawler belt (43);
the opening and closing window (6) comprises symmetrically installed outer windows (61) and symmetrically installed inner windows (60), the outer sides of the symmetrical outer windows (61) are hinged to one side of a plurality of shaft cores (62), the other sides of the shaft cores (62) are hinged to the middle edge of a frame (2), the inner sides of the symmetrical outer windows (61) are hinged to one side of a hinge shaft (63), the other sides of the hinge shaft (63) are hinged to the symmetrically installed inner windows (60), the top ends of the symmetrical inner windows (60) are respectively and rotatably connected with the bottom end of a long rod (46) and the bottom end of a short rod (48), the bottom of the symmetrical inner windows (60) is fixedly connected with the top end of a fixing part of a roller component (7), the roller part of the roller component (7) is in rolling connection with a rolling groove (8), and the rolling groove (8) is formed in the edge of the top surface of the bottom plate (1); symmetry interior window (60) outside articulates shrink net (9) both ends, shrink net (9) are including netting cover (90), the articulated interior window (60) outside in netting cover (90) left side, otter board (91) is cup jointed in netting cover (90) cover chamber activity, the articulated opposite side interior window (60) outside in otter board (91) right side.
2. The night ventilating energy-saving skylight structure capable of detecting weather parameters as claimed in claim 1, wherein: the top surface of the servo (40) is connected with a fixing plate (400) through bolts, and the front surface of the fixing plate (400) is fixedly connected with the back surface of the frame (2).
3. The night ventilating energy-saving skylight structure capable of detecting weather parameters as claimed in claim 1, wherein: the neck of the rotating shaft (41) is sleeved with a bearing (410), and the outer ring of the bearing (410) is embedded in the frame (2).
4. The night ventilating energy-saving skylight structure capable of detecting weather parameters as claimed in claim 1, wherein: the middle part of the driven gear (44) is rotatably connected with a pin shaft (440), and the tail end of the pin shaft (440) is fixedly connected with the frame (2).
5. The night ventilating energy-saving skylight structure capable of detecting weather parameters as claimed in claim 1, wherein: the top end of the inner window (60) is symmetrically and fixedly connected with the bottom of the outer ring of a bearing ring (49), the inner ring of the bearing ring (49) is connected with the bottom end of a long rod (46) and the bottom end of a short rod (48) in an interference fit manner, two sides of the middle part of the long rod (46) and the short rod (48) are movably connected with the inner sides of magnet strips (10), the outer sides of the magnet strips (10) are fixedly connected with a pull net (11), the edge of the pull net (11) is fixedly connected with the wall of a movable cavity (30), and the movable cavity (30) is arranged at the edge of a top plate (3); the neck parts of the long rod (46) and the short rod (48) movably penetrate through a limiting groove (50), the limiting groove (50) is longitudinally formed in the middle of the limiting plate (5), and the back surface of the limiting plate (5) is fixedly connected with the frame (2).
6. The night ventilating energy-saving skylight structure capable of detecting weather parameters as claimed in claim 1, wherein: the roller assembly (7) comprises a connecting plate (70), a top surface bearing of the connecting plate (70) is connected with the inner side of the bottom of the inner window (60), two sides of the bottom surface of the connecting plate (70) are symmetrically and fixedly connected with a positioning plate (71), a pin bolt (72) is inserted in the middle of the positioning plate (71), the middle of the pin bolt (72) is rotatably connected with a roller (73), and the bottom of the roller (73) is in rolling contact with the rolling groove (8); spacing pad (74) is cup jointed at cotter pin (72) both ends, spacing pad (74) inboard clearance contact locating plate (71), spacing pad (74) outside clearance contact bolt (75), bolt (75) activity grafting cotter pin (72) is terminal.
7. The night ventilating energy-saving skylight structure capable of detecting weather parameters as claimed in claim 1, wherein: the left side of the net cover (90) and the right side of the net plate (91) are symmetrically hinged to one side of the twisted core (92), and the other side of the twisted core is symmetrically hinged to the outer side of the inner window (60).
8. The night ventilating energy-saving skylight structure capable of detecting weather parameters as claimed in claim 1, wherein: the middle part of the edge of the back side of the frame (2) is fixedly connected with a controller (12), one part of the top surface of the top plate (3) is fixedly connected with an air speed sensor (13), the other part of the top surface of the top plate (3) is fixedly connected with a temperature sensor (14), and the top of the temperature sensor (14) is fixedly connected with a humidity sensor; the controller (12), the wind speed sensor (13), the temperature sensor (14), the humidity sensor (15) and the servo (40) are connected through electric wires.
CN202120794100.1U 2021-04-16 2021-04-16 Night ventilation energy-saving skylight structure capable of detecting meteorological parameters Expired - Fee Related CN214739350U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120794100.1U CN214739350U (en) 2021-04-16 2021-04-16 Night ventilation energy-saving skylight structure capable of detecting meteorological parameters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120794100.1U CN214739350U (en) 2021-04-16 2021-04-16 Night ventilation energy-saving skylight structure capable of detecting meteorological parameters

Publications (1)

Publication Number Publication Date
CN214739350U true CN214739350U (en) 2021-11-16

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Application Number Title Priority Date Filing Date
CN202120794100.1U Expired - Fee Related CN214739350U (en) 2021-04-16 2021-04-16 Night ventilation energy-saving skylight structure capable of detecting meteorological parameters

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GR01 Patent grant
GR01 Patent grant
CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Hu Haowei

Inventor after: Kang Xiaobin

Inventor after: Wang Qinzhang

Inventor before: Hu Haowei

Inventor before: Kang Xiaobin

Inventor before: Wang Qinzhang

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20211116