Mechanical automatic closing shutter ventilation device

Abstract

The utility model belongs to the technical field of ventilation equipment, and discloses a mechanical automatic closing shutter ventilation device which comprises a ventilation box with an airflow channel, blades arranged in the ventilation box, a balance weight part acting on the blades, a hot melting part arranged in the ventilation box and used for applying upward force to the balance weight part and a locking part acting on the blades. The blades are rotationally connected to the ventilation box so that the blades can have an opening position for opening the airflow channel and a closing position for closing the airflow channel, the hot melting piece can be automatically fused along with temperature rise so that the balance weight piece can move downwards without upward force, the blades move from the opening position to the closing position, and when the blades are located at the closing position, the blades can be closed. The locking piece is matched with the ventilation box in a stopping mode so that the blades can be limited to the closing position, and therefore the airflow channel can be automatically closed through the gravity of the balance weight piece, fire spreading is avoided, and potential safety hazards are eliminated.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ventilation equipment, and particularly relates to a mechanical automatic closing louver ventilation device. BACKGROUND

[0002] In the energy storage industry, there are still a large number of air-cooled design energy storage cabinet products due to cost advantages. The air-cooled design is characterized in that the air circulation inside and outside the energy storage cabinet is not sealed and isolated, but when the energy storage battery is in thermal runaway, the fire is likely to spread outside through the air outlet, which may cause harm to personnel or damage to equipment. Therefore, a louver ventilation device capable of automatic closing needs to be installed at the air outlet to automatically close the air outlet to prevent the spread of fire.

[0003] At present, the automatic closing louver ventilation device is usually controlled by electricity. When thermal runaway occurs, the temperature at the air outlet is high, which causes the wiring harness to be easily damaged, so that the automatic closing louver ventilation device cannot be automatically closed, and the spread of fire is also caused, which has a great safety hazard. CONTENT OF THE UTILITY MODEL

[0004] The application provides a mechanical automatic closing louver ventilation device to automatically close according to the fire and avoid the spread of fire and eliminate safety hazards.

[0005] The technical scheme adopted by the application is as follows:

[0006] The mechanical automatic closing louver ventilation device comprises a ventilation box with an air flow channel, a louver arranged in the ventilation box, a counterweight acting on the louver, a hot melting member arranged in the ventilation box and used for applying an upward force to the counterweight, and a locking member acting on the louver. The louver is rotationally connected to the ventilation box, so that the louver has an open position for opening the air flow channel and a closed position for closing the air flow channel. The hot melting member can be automatically fused with the increase of temperature, so that the counterweight loses the upward force and moves downward. The louver moves from the open position to the closed position, and when the louver is in the closed position, the locking member is in abutment with the ventilation box to limit the louver in the closed position.

[0007] By adopting the above technical scheme, when thermal runaway occurs, the temperature at the installation position of the mechanical automatic closing louver ventilation device gradually increases. At this time, the hot melting member is automatically fused with the increase of temperature, so that the counterweight loses the upward force and moves downward under the action of its own gravity, so that the louver rotates from the open position to the closed position, thereby realizing the automatic closing of the air flow channel. In this way, the automatic closing of the air flow channel according to the fire is realized, the spread of fire is avoided, and the safety hazard is eliminated.

[0008] And the blade rotates to the closed position, the locking member and the ventilation box stop cooperation, thereby realizing the blade is limited in the closed position, avoid the blade due to the pressure difference between the two sides of the large air flow channel opening position rotation, to further improve the blade on the closing effect, to greatly improve the safety.

[0009] Optionally, the locking member comprises a locking pin slidingly connected to the blade, the ventilation box is provided with a locking hole for accommodating the locking pin, and when the blade is in the closed position, one end of the locking pin extends into the locking hole.

[0010] By adopting the above technical scheme, when the blade rotates from the open position to the closed position, the locking pin slides relative to the blade under the action of its own gravity, so that after the blade rotates to the closed position, one end of the locking pin automatically extends into the locking hole, to realize automatic locking of the blade.

[0011] Optionally, the blade comprises a blade body and a rotating blade provided on the blade body, both ends of the rotating blade are rotatably connected to the wall of the ventilation box, the locking member further comprises a mounting shell provided on the rotating blade, and the locking pin is slidingly connected to the mounting shell.

[0012] By adopting the above technical scheme, since the locking pin is slidingly connected to the mounting shell, the connection stability of the locking pin and the blade is increased, and the assembly difficulty of the locking pin is reduced, thereby reducing the production cost of the mechanical automatic closing louver ventilation device.

[0013] Optionally, the mounting shell has an accommodating cavity inside, the locking pin is provided with a stop rod located in the accommodating cavity, and the stop rod can stop cooperate with the cavity wall of the accommodating cavity to limit the sliding stroke of the locking pin.

[0014] By adopting the above technical scheme, since the locking pin is provided with a stop rod located in the accommodating cavity, the stop rod can stop cooperate with the cavity wall of the accommodating cavity, thereby the stop cooperation between the locking pin and the cavity wall of the accommodating cavity can limit the sliding stroke of the locking pin, to avoid the separation of the locking pin and the mounting shell, thereby increasing the stability of the locking pin, to ensure the locking effect of the locking pin on the blade.

[0015] Optionally, the blade comprises a blade body and a rotating blade provided on the blade body, both ends of the rotating blade are rotatably connected to the wall of the ventilation box, the locking member further comprises a mounting shell provided on the rotating blade, and the locking pin is slidingly connected to the mounting shell.

[0016] By adopting the technical scheme, after the hot-melt piece is broken due to the temperature rise, the counterweight piece moves downward under the action of its own gravity, and since the counterweight piece is connected to the second end of the connecting piece and the pivot of the connecting piece is located between the first end and the second end, the first end of the connecting piece rotates upward around the pivot, so that the blade rotates from the open position to the closed position, thereby driving the blade to the closed position when the counterweight piece moves downward.

[0017] Optionally, the locking piece comprises a locking rod arranged on the connecting piece and an elastic part acting on the locking rod, the elastic part can exert a force on the locking rod towards the inner wall of the ventilation box, and the inner wall of the ventilation box is provided with a fixing hole accommodating the locking rod, and when the blade is in the closed position, the locking rod extends into the fixing hole under the action of the elastic part.

[0018] By adopting the technical scheme, when the counterweight piece moves downward under the action of its own gravity, the connecting piece drives the locking rod to move, and when the blade rotates to the closed position, the locking rod extends into the fixing hole under the action of the elastic part, thereby the locking rod and the fixing hole are inserted and matched to lock the connecting piece, so as to automatically lock the blade and ensure the stability of the blade closing the airflow passage.

[0019] Optionally, the locking piece further comprises a fixing shell arranged on the connecting piece, and the fixing shell has an installation cavity accommodating the locking rod in the interior, and the elastic part is arranged in the installation cavity and acts on the cavity wall of the installation cavity.

[0020] By adopting the technical scheme, since the elastic part is arranged in the installation cavity and acts on the cavity wall of the installation cavity, the installation cavity can support the elastic part to increase the stability of the elastic part, and the connection stability of the locking rod and the connecting piece can also be increased.

[0021] Optionally, a plurality of blades are arranged in a direction perpendicular to the airflow flowing through the airflow passage, and the mechanical automatic closing louver ventilation device further comprises a linkage structure connecting the plurality of blades, and the plurality of blades rotate synchronously under the action of the linkage structure.

[0022] By adopting the technical scheme, since the plurality of blades can rotate synchronously under the action of the linkage structure, the plurality of blades can rotate synchronously from the open position to the closed position, thereby reducing the number of counterweight pieces, simplifying the structure of the mechanical automatic closing louver ventilation device, and reducing the production cost of the mechanical automatic closing louver ventilation device.

[0023] Optionally, an end of the blade is provided with a connecting piece rotationally connected with the ventilation box, the linkage structure comprises linkage shafts arranged at the connecting piece away from the blade, and linkage pieces rotationally connected with the linkage shafts, and the ventilation box is provided with arc-shaped grooves corresponding to the linkage shafts, and the linkage shafts are located in the arc-shaped grooves.

[0024] By adopting the above technical scheme, after the counterweight loses the upward force, the counterweight moves downward under the action of its own gravity, so as to drive the corresponding connecting piece to rotate around the rotating shaft, thereby driving the corresponding blade to rotate from the open position to the closed position, and the connecting piece drives the linkage shaft to move, the linkage shaft slides in the arc-shaped groove, and the linkage shaft drives the linkage piece to move, and the plurality of linkage shafts move synchronously under the action of the linkage piece, so as to realize synchronous rotation of the plurality of blades.

[0025] Optionally, the ventilation box is provided with a filter screen located at the air inlet of the airflow channel.

[0026] And / or, the ventilation box is provided with a mounting piece located at the air outlet of the airflow channel.

[0027] By adopting the above technical scheme, since the filter screen is located at the air inlet of the airflow channel, the filter screen can block and filter dust entering the airflow channel through the air inlet, so as to ensure the cleanliness of the airflow.

[0028] Since the ventilation box is provided with the mounting piece located at the air outlet of the airflow channel, the ventilation box can be fixed at the air outlet of the airflow channel, so as to increase the fixing stability of the mechanical automatic closing louver ventilation device, and increase the aesthetic appearance of the mechanical automatic closing louver ventilation device, so as to improve the user experience.

[0029] Since the above technical scheme is adopted, the application has the following beneficial effects:

[0030] 1. The mechanical automatic closing louver ventilation device in the application comprises a ventilation box with an air flow channel, a louver arranged in the ventilation box, a counterweight acting on the louver, a hot melt member arranged on the ventilation box and used for applying an upward force to the counterweight, and a locking member acting on the louver, the louver is rotationally connected to the ventilation box, so that the louver has an open position for opening the air flow channel and a closed position for closing the air flow channel, the hot melt member can be automatically fused with the increase of temperature, so that the counterweight loses the upward force and moves downward, the louver moves from the open position to the closed position, and when the louver is in the closed position, the locking member is in abutment with the ventilation box to limit the louver in the closed position, when the thermal runaway occurs, the temperature at the installation position of the mechanical automatic closing louver ventilation device gradually increases, at this time, the hot melt member is automatically fused with the increase of temperature, so that the counterweight loses the upward force and moves downward under the action of its own gravity, so that the louver rotates from the open position to the closed position, thereby realizing the automatic closing of the air flow channel, and further realizing the automatic closing of the air flow channel according to the fire condition, avoiding the spread of the fire condition and eliminating the safety hazard. After the louver rotates to the closed position, the locking member is in abutment with the ventilation box, thereby realizing the limitation of the louver in the closed position, avoiding the situation that the louver rotates towards the open position due to the large air pressure difference between the two sides of the louver, further improving the closing effect of the louver on the air flow channel, and greatly improving the safety.

[0031] 2. The locking member in the application comprises a locking pin slidingly connected to the louver, the ventilation box is provided with a locking hole accommodating the locking pin, when the louver is in the closed position, one end of the locking pin extends into the locking hole, when the louver rotates from the open position to the closed position, the locking pin relatively slides with the louver under the action of its own gravity, so that after the louver rotates to the closed position, one end of the locking pin automatically extends into the locking hole, thereby realizing the automatic locking of the louver.

[0032] 3. The louver in the application comprises a sheet body and a rotating sheet arranged on the sheet body, both ends of the rotating sheet are rotationally connected to the wall of the ventilation box, the locking member further comprises a mounting shell arranged on the rotating sheet, and the locking pin is slidingly connected to the mounting shell, thereby increasing the connection stability of the locking pin and the louver, reducing the assembly difficulty of the locking pin, and reducing the production cost of the mechanical automatic closing louver ventilation device. BRIEF DESCRIPTION OF DRAWINGS

[0033] The drawings described herein are used to provide further understanding of the application, and constitute a part of the application. The schematic embodiments of the application and the description thereof are used to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0034] Figure 1 It is a structure schematic view of the mechanical automatic closing louver ventilation device in one embodiment of the application;

[0035] Figure 2 Fig. 6 is a schematic view of another perspective structure of the mechanical automatic closing louver according to an embodiment of the present application;

[0036] Figure 3 Fig. 7 is a schematic view of still another perspective structure of the mechanical automatic closing louver according to an embodiment of the present application;

[0037] Figure 4 Fig. 8 is a sectional view of the mechanical automatic closing louver according to an embodiment of the present application;

[0038] Figure 5 Fig. 9 is a schematic view of a partial structure of the mechanical automatic closing louver according to an embodiment of the present application;

[0039] Figure 6 Fig. 10 is a schematic view of a structure of the rotating piece and the locking piece according to an embodiment of the present application;

[0040] Figure 7 Fig. 11 is a schematic view of a structure of the connecting piece according to an embodiment of the present application;

[0041] Figure 8 Fig. 12 is a schematic view of a structure of the mechanical automatic closing louver according to another embodiment of the present application.

[0042] Reference Signs:

[0043] 1, ventilation box; 11, mounting seat; 12, locking hole; 13, fixing hole; 14, arc-shaped slot; 15, protective cover; 16, filter screen; 17, mounting piece; 2, louver; 21, piece body; 22, rotating piece; 221, connecting piece; 222, rotating shaft; 223, fixed shell; 3, counterweight; 4, hot melting piece; 5, locking piece; 51, locking pin; 52, mounting shell; 53, locking rod; 6, linkage structure; 61, linkage shaft; 62, linkage piece. DETAILED DESCRIPTION

[0044] In order to more clearly illustrate the overall concept of the present application, the following detailed description is given with reference to the accompanying drawings.

[0045] In the following description, a lot of specific details are set forth in order to fully understand the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0046] In addition, in the description of the present application, it needs to be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0047] In the present application, unless specifically defined and limited otherwise, the terms "mount", "connect", "connect", "fix" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection, or communication; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the specification, the description of the terms "embodiment", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0049] Referring to Figures 1 to 8 , a mechanical automatic closing louver ventilation device is disclosed, which comprises a ventilation box 1 with an air flow channel, a louver 2 arranged in the ventilation box 1, a counterweight 3 acting on the louver 2, a hot melt member 4 arranged in the ventilation box 1 and used for applying upward force to the counterweight 3, and a locking member 5 acting on the louver 2, the louver 2 is rotatably connected to the ventilation box 1, so that the louver 2 has an opening position for opening the air flow channel and a closing position for closing the air flow channel, the hot melt member 4 can be automatically fused with the increase of temperature, so that the counterweight 3 loses the upward force and moves downward, the louver 2 moves from the opening position to the closing position, and when the louver 2 is in the closing position, the locking member 5 is in stop cooperation with the ventilation box 1 to limit the louver 2 in the closing position.

[0050] When the heat runaway occurs, the temperature at the installation of the mechanical automatic closing louver ventilation device gradually rises, at this time, the hot melt piece 4 is automatically fused with the rise of the temperature, and then the counterweight piece 3 loses the upward force and moves downward under the action of its own gravity to rotate the blade 2 from the open position to the closed position, thereby realizing the automatic closing of the airflow passage, and further realizing the automatic closing of the airflow passage according to the fire condition, avoiding the spread of the fire condition and eliminating the safety hazard.

[0051] And after the blade 2 rotates to the closed position, the locking piece 5 is in abutment with the ventilation box 1, thereby realizing the limitation of the blade 2 in the closed position, avoiding the situation that the blade 2 may rotate towards the open position due to the large air pressure difference on both sides of the blade 2, to further improve the closing effect of the blade 2 on the airflow passage, to greatly improve the safety.

[0052] It should be noted that when the mechanical automatic closing louver ventilation device is used again, the staff needs to manually operate the locking piece 5 to unlock the blade 2, replace the hot melt piece 4, and rotate the blade 2 to the open position to realize the reuse of the mechanical automatic closing louver ventilation device.

[0053] The structure of the hot melt piece 4 is not specifically limited in the present application, which can be a rubber band to realize the release of the counterweight piece 3 by using the characteristic that the rubber band can automatically break with the rise of the temperature; the hot melt piece 4 can also be a thermal element, as long as it can automatically break and release the counterweight piece 3 when the temperature is higher than the threshold value.

[0054] In a preferred embodiment, referring to Figure 5 , the ventilation box 1 is provided with a mounting seat 11 above the counterweight piece 3, and the hot melt piece 4 is connected to the mounting seat 11 to realize the limitation of the counterweight piece 3 in the vertical direction by applying an upward pulling force to the counterweight piece 3.

[0055] In other embodiments, the hot melt piece 4 can also be arranged at the bottom of the counterweight piece 3 to realize the limitation of the counterweight piece 3 in the vertical direction by applying a supporting force to the counterweight piece 3.

[0056] The structure of the locking piece 5 is not specifically limited in the present application, which can adopt any one of the following embodiments:

[0057] Embodiment one, in this embodiment, referring to Figure 1 , Figure 3 , Figure 5 and Figure 6 , the locking piece 5 includes a locking pin 51 slidingly connected to the blade 2, and the ventilation box 1 is provided with a locking hole 12 accommodating the locking pin 51, and one end of the locking pin 51 extends into the locking hole 12 when the blade 2 is in the closed position.

[0058] Specifically, when the blade 2 rotates from the open position to the closed position, the locking pin 51 slides relative to the blade 2 under the action of its own gravity, so that after the blade 2 rotates to the closed position, one end of the locking pin 51 automatically extends into the locking hole 12 to achieve automatic locking of the blade 2.

[0059] Further, referring to Figure 5 and Figure 6 , the blade 2 includes a blade body 21 and a rotating blade 22 provided on the blade body 21, both ends of the rotating blade 22 are rotatably connected to the wall of the ventilation box 1, the locking member 5 further includes a mounting shell 52 provided on the rotating blade 22, and the locking pin 51 is slidably connected to the mounting shell 52, thereby increasing the stability of the connection between the locking pin 51 and the blade 2, and reducing the assembly difficulty of the locking pin 51 and the production cost of the mechanical automatic closing louver ventilation device.

[0060] Further, referring to Figure 6 , the mounting shell 52 has a receiving cavity inside, the locking pin 51 is provided with a stop rod located in the receiving cavity, the stop rod can be stopped by the cavity wall of the receiving cavity to limit the sliding stroke of the locking pin 51, so as to avoid the separation of the locking pin 51 and the mounting shell 52, thereby increasing the stability of the locking pin 51 and ensuring the locking effect of the locking pin 51 on the blade 2.

[0061] In the second embodiment, referring to Figure 4 and Figure 7 , the blade 2 includes a blade body 21 and a rotating blade 22 provided on the blade body 21, both ends of the rotating blade 22 are bent and extended to provide a connecting piece 221, the connecting piece 221 has a first end connected to the rotating blade 22 and a second end connected to the counterweight 3, and the connecting piece 221 is provided with a rotating shaft 222 rotatably connected to the ventilation box 1 and located between the first end and the second end.

[0062] After the heat melting member 4 breaks due to the increase in temperature, the counterweight 3 moves downward under the action of its own gravity, since the counterweight 3 is connected to the second end of the connecting piece 221 and the rotating shaft 222 of the connecting piece 221 is located between the first end and the second end, the first end of the connecting piece 221 rotates upward around the rotating shaft 222, thereby rotating the blade 2 from the open position to the closed position, so as to drive the blade 2 to the closed position when the counterweight 3 moves downward.

[0063] Preferably, the counterweight 3 is in a rod shape, so as to reduce the flow area of the airflow passage occupied by the counterweight 3.

[0064] Further, referring to Figure 4 and Figure 7The locking member 5 comprises a locking rod 53 arranged on the connecting piece 221 and an elastic part acting on the locking rod 53. The elastic part can exert a force on the locking rod 53 towards the inner wall of the ventilation box 1. The inner wall of the ventilation box 1 is provided with a fixing hole 13 for accommodating the locking rod 53. When the blade 2 is in the closed position, the locking rod 53 extends into the fixing hole 13 under the action of the elastic part.

[0065] When the counterweight 3 moves downward under the action of its own gravity, the connecting piece 221 drives the locking rod 53 to move. When the blade 2 rotates to the closed position, the locking rod 53 extends into the fixing hole 13 under the action of the elastic part, and then the plug-in cooperation between the locking rod 53 and the fixing hole 13 locks the connecting piece 221, thereby achieving automatic locking of the blade 2 and ensuring the stability of the blade 2 in closing the airflow passage.

[0066] Further, referring to Figure 7 The locking member 5 further comprises a fixing shell 223 arranged on the connecting piece 221. The fixing shell 223 has an installation cavity inside for accommodating the locking rod 53. The elastic part is arranged in the installation cavity and acts on the cavity wall of the installation cavity, thereby supporting the elastic part to increase the stability of the elastic part and the connection stability of the locking rod 53 and the connecting piece 221.

[0067] The structure of the elastic part is not limited in the present application. Preferably, the elastic part is a spring to ensure the elastic driving effect on the locking rod 53. One end of the spring is fixedly connected to the locking rod 53, and the other end of the spring abuts against the cavity wall of the installation cavity. In other embodiments, the elastic part can also be an elastic column, an elastic sheet or other structures capable of exerting an elastic force on the locking rod 53.

[0068] The third embodiment is a preferred embodiment, which combines the first and second embodiments to increase the locking effect on the blade 2 and ensure the closing effect on the airflow passage.

[0069] The number of blades 2 is not limited in the present application. Preferably, referring to Figures 1 to 5 The plurality of blades 2 are arranged in a direction perpendicular to the airflow passing through the airflow passage, and the mechanical automatic closing louver ventilation device further comprises a linkage structure 6 connecting the plurality of blades 2. The plurality of blades 2 can be synchronously rotated under the action of the linkage structure 6.

[0070] Since the plurality of blades 2 can be synchronously rotated under the action of the linkage structure 6, the plurality of blades 2 can be synchronously rotated from the open position to the closed position, thereby reducing the number of counterweights 3, simplifying the structure of the mechanical automatic closing louver ventilation device and reducing the production cost of the mechanical automatic closing louver ventilation device.

[0071] Preferably, when the blades 2 are in the closed position, two adjacent blades 2 abut against each other to improve the closing effect on the airflow passage.

[0072] The linkage structure 6 is not limited in structure, and any of the following embodiments can be adopted.

[0073] In Embodiment 1, with reference to Figure 3 and Figure 5 , the end of the blade 2 is provided with a connecting piece 221 rotatably connected to the ventilation box 1, the linkage structure 6 includes linkage shafts 61 arranged at the end of the connecting piece 221 away from the blade 2 and linkage pieces 62 rotatably connected to the linkage shafts 61, and the ventilation box 1 is provided with arc-shaped grooves 14 corresponding to the linkage shafts 61, and the linkage shafts 61 are located in the arc-shaped grooves 14.

[0074] After the counterweight 3 loses the upward force, the counterweight 3 moves downward under the action of its own gravity, so that the counterweight 3 drives the corresponding connecting piece 221 to rotate around the rotating shaft 222, thereby causing the corresponding blade 2 to rotate from the open position to the closed position. The connecting piece 221 drives the linkage shaft 61 to move, the linkage shaft 61 slides in the arc-shaped groove 14, and the linkage shaft 61 drives the linkage piece 62 to move. The plurality of linkage shafts 61 move synchronously under the action of the linkage piece 62, so as to realize the synchronous rotation of the plurality of blades 2.

[0075] Preferably, the linkage piece 62 is located outside the ventilation box 1, so that the linkage piece 62 is avoided from the blade 2, to ensure the closing effect of the blade 2 on the airflow passage.

[0076] Further, with reference to Figure 1 and Figure 8 , the outside of the ventilation box 1 is provided with a protective cover 15 covering the outside of the linkage piece 62, to avoid the linkage piece 62 interfering with the wall of the ventilation port, so as to avoid affecting the rotation of the blade 2, and to ensure the normal rotation of the blade 2.

[0077] In Embodiment 2, the end of the blade 2 is provided with a connecting piece 221, the connecting piece 221 is provided with a rotating shaft 222 rotatably connected to the ventilation box 1, and the linkage structure 6 includes pulleys arranged on the rotating shaft 222 and a belt connecting adjacent pulleys, so as to realize the synchronous rotation of the plurality of blades 2 by the cooperation of the belt and the pulley.

[0078] It should be noted that in the present embodiment, the locking pin 51 is arranged on the blade 2 located at the bottom of the plurality of blades 2, and the counterweight 3 is connected to one of the blades 2.

[0079] In other embodiments, the blade 2 can also be provided with only one.

[0080] In a preferred embodiment, with reference toFigure 8 The ventilation box 1 is provided with a filter screen 16 at the air inlet of the air flow channel, so that the filter screen 16 can perform barrier filtration on dust entering the air flow channel through the air inlet, to ensure the cleanliness of the air flow, and avoid the occurrence of the situation that mosquitoes enter the air flow channel.

[0081] In a preferred embodiment, with reference to Figure 1 , Figure 2 , Figure 3 and Figure 8 The ventilation box 1 is provided with a mounting piece 17 at the air outlet of the air flow channel, so that the ventilation box 1 can be fixed at the air outlet of the air inlet channel, to increase the fixing stability of the mechanical automatic closing louver ventilation device, and increase the aesthetics of the mechanical automatic closing louver ventilation device, to improve the user experience.

[0082] The places not described in the present application can be realized by using or referring to the existing technology.

[0083] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment mainly describes the difference from other embodiments.

[0084] The above only describes the embodiments of the present application and is not used to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A mechanical automatic closing louver ventilation device, characterized in that, The device includes a ventilation box (1) with an airflow channel, blades (2) disposed inside the ventilation box (1), a counterweight (3) acting on the blades (2), a thermoplastic component (4) disposed in the ventilation box (1) and used to apply an upward force to the counterweight (3), and a locking component (5) acting on the blades (2). The blades (2) are rotatably connected to the ventilation box (1) so that the blades (2) have an open position for opening the airflow channel and a closed position for closing the airflow channel. The thermoplastic component (4) can automatically melt as the temperature rises, so that the counterweight (3) loses its upward force and moves downward. The blades (2) move from the open position to the closed position, and when the blades (2) are in the closed position, the locking component (5) cooperates with the ventilation box (1) to stop and limit the blades (2) in the closed position.

2. The mechanical automatic closing louver ventilation device according to claim 1, characterized in that, The locking member (5) includes a locking pin (51) slidably connected to the blade (2). The ventilation box (1) is provided with a locking hole (12) for accommodating the locking pin (51). When the blade (2) is in the closed position, one end of the locking pin (51) extends into the locking hole (12).

3. The mechanical automatic closing louver ventilation device according to claim 2, characterized in that, The blade (2) includes a blade body (21) and a rotating blade (22) disposed on the blade body (21). Both ends of the rotating blade (22) are rotatably connected to the wall of the ventilation box (1). The locking member (5) also includes a mounting shell (52) disposed on the rotating blade (22). The locking pin (51) is slidably connected to the mounting shell (52).

4. A mechanical automatic closing louver ventilation device according to claim 3, characterized in that, The mounting housing (52) has an internal cavity, and the locking pin (51) is provided with a stop bar located in the cavity. The stop bar can cooperate with the cavity wall of the cavity to limit the sliding stroke of the locking pin (51).

5. A mechanical automatic closing louver ventilation device according to claim 1, characterized in that, The blade (2) includes a blade body (21) and a rotating blade (22) disposed on the blade body (21). Both ends of the rotating blade (22) are bent and extended to provide connecting pieces (221). The connecting piece (221) has a first end connected to the rotating blade (22) and a second end connected to the counterweight (3). The connecting piece (221) is provided with a rotating shaft (222) rotatably connected to the ventilation box (1) and located between the first end and the second end.

6. A mechanical automatic closing louver ventilation device according to claim 5, characterized in that, The locking member (5) includes a locking rod (53) provided on the connecting piece (221) and an elastic part acting on the locking rod (53). The elastic part can apply a force to the locking rod (53) toward the inner wall of the ventilation box (1). The inner wall of the ventilation box (1) is provided with a fixing hole (13) for accommodating the locking rod (53). When the blade (2) is in the closed position, the locking rod (53) extends into the fixing hole (13) under the action of the elastic part.

7. A mechanical automatic closing louver ventilation device according to claim 6, characterized in that, The locking member (5) further includes a fixing shell (223) disposed on the connecting piece (221). The interior of the fixing shell (223) has a mounting cavity for accommodating the locking rod (53). The elastic part is disposed in the mounting cavity and acts on the cavity wall of the mounting cavity.

8. A mechanical automatic closing louver ventilation device according to claim 1, characterized in that, The blades (2) are arranged in multiple directions perpendicular to the airflow through the airflow channel, and the mechanical automatic closing louver ventilation device also includes a linkage structure (6) connecting the multiple blades (2), and the multiple blades (2) rotate synchronously under the action of the linkage structure (6).

9. A mechanical automatic closing louver ventilation device according to claim 8, characterized in that, The end of the blade (2) is provided with a connecting piece (221) that is rotatably connected to the ventilation box (1). The linkage structure (6) includes a linkage shaft (61) located at the end of the connecting piece (221) away from the blade (2) and a linkage piece (62) rotatably connected to a plurality of linkage shafts (61). The ventilation box (1) is provided with an arc groove (14) corresponding to the linkage shaft (61), and the linkage shaft (61) is located in the arc groove (14).

10. A mechanical automatic closing louver ventilation device according to claim 1, characterized in that, The ventilation box (1) has a filter (16) located at the air inlet of the airflow channel; And / or, the ventilation box (1) has a mounting plate (17) located at the air outlet of the airflow channel.

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