Ventilation device and courtyard machine

Abstract

The invention provides a ventilation device and a courtyard machine, the ventilation device comprises a panel body, a grating and a lifting mechanism, and the panel body is provided with a ventilation opening and is provided with a first support; the grating is arranged at the ventilation opening and is provided with a second bracket; the lifting mechanism comprises a self-locking transmission assembly and a lifting arm assembly. The lifting arm assembly is in transmission connection with the self-locking transmission assembly, the first support and the second support. When the self-locking transmission assembly drives the lifting arm assembly to move and enables the second support to be far away from the first support, the grating moves downwards and is far away from the ventilation opening, and the grating is convenient to clean. When the self-locking transmission assembly moves to drive the lifting arm assembly to move and enable the second support to get close to the first support, the grating moves upwards and gets close to the ventilation opening, and then the grating is located at the ventilation opening and guides air flowing through the ventilation opening. When the self-locking transmission assembly does not move, the grating can be locked on the panel body under the action of the self-locking transmission assembly and the lifting arm assembly; and the grating is stably lifted up and down, so that the grating cleaning process is simplified.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and in particular relates to a ventilation device and a skylight unit. Background Art

[0002] The grille of a ceiling hood is mounted on the panel and primarily serves as a ventilation system. To ensure effective ventilation, the grille requires regular cleaning. However, since the ceiling hood is mounted on the ceiling and the grille and panel are connected by snaps, disassembly and assembly is inconvenient, making cleaning the grille cumbersome. Existing technology uses an "electric push rod mechanism + adjustable snap" solution to adjust the height of the grille relative to the panel. However, this solution requires a constant power supply for the grille's lifting mechanism, and the grille's instability during lifting and lowering makes cleaning the grille cumbersome and prone to electrical safety issues. Summary of the Invention

[0003] In view of this, the present invention provides a ventilation device and a roof machine to solve the problems that the lifting mechanism of the grille in the existing roof machine needs to be energized for a long time and the grille is unstable when it is raised and lowered, which leads to electrical safety problems and cumbersome grille cleaning process.

[0004] The present invention provides a ventilation device for a roof crane; the ventilation device comprises:

[0005] A panel body is formed with a vent, and the panel body is provided with a first bracket at the vent;

[0006] A grille is provided at the vent so as to be able to be raised and lowered; the grille is provided with a second bracket;

[0007] The lifting mechanism includes a self-locking transmission assembly and a lifting arm assembly, wherein the self-locking transmission assembly is movably arranged on the panel body or the first bracket; the lifting arm assembly is respectively connected to the self-locking transmission assembly, the first bracket and the second bracket in a transmission manner;

[0008] The ventilation device is configured as follows: when the self-locking transmission assembly moves with the lifting arm assembly and moves the second bracket away from the first bracket, the grille moves downward and away from the vent; when the self-locking transmission assembly moves with the lifting arm assembly and moves the second bracket close to the first bracket, the grille moves upward and close to the vent; when the self-locking transmission assembly does not move, the grille can be locked on the panel body under the action of the self-locking transmission assembly and the lifting arm assembly.

[0009] Further optionally, the lifting arm assembly includes a main lifting arm and a slave lifting arm arranged crosswise in a vertical direction, the main lifting arm and the slave lifting arm are hingedly connected at the intersection; the main lifting arm includes a main upper connecting portion and a main lower connecting portion, and the slave lifting arm includes a slave upper connecting portion and a slave lower connecting portion; the main upper connecting portion is in driving connection with a self-locking transmission assembly, the slave upper connecting portion acts together with the first bracket, and the slave lower connecting portion and the main lower connecting portion both act together with the second bracket;

[0010] The ventilation device is configured as follows: when the self-locking transmission assembly moves upward with the main upper connection part, the second bracket moves away from the first bracket; when the self-locking transmission assembly moves downward with the main upper connection part, the second bracket approaches the first bracket; when the self-locking transmission assembly does not move, the second bracket is stationary relative to the first bracket.

[0011] Further optionally, the self-locking transmission assembly includes a first self-locking transmission member and a second self-locking transmission member; the first self-locking transmission member is rotatably disposed on the panel body or the first bracket, the second self-locking transmission member is connected to the first self-locking transmission member via a transmission tooth; the second self-locking transmission member is directly or indirectly connected to the main upper connecting portion;

[0012] The first self-locking transmission member and the second self-locking transmission member are configured as follows: when the first self-locking transmission member rotates, the second self-locking transmission member directly or indirectly drives the main upper connecting part to move upward or downward; when the first self-locking transmission member does not rotate, the first self-locking transmission member and the second self-locking transmission member self-lock, and then the grille is locked on the panel body.

[0013] Further optionally, the first self-locking transmission member is a worm, and the second self-locking transmission member is a worm wheel;

[0014] The self-locking transmission assembly further includes a gear and a rack, the gear being rotatably disposed on the panel body or the first bracket, the gear and the worm gear being coaxially disposed and connected via a transmission shaft; the rack being meshed with the gear, and the rack being connected to the main upper connecting portion;

[0015] The gear and the rack are configured such that: when the worm rotates, the rack moves upward or downward with the main upper connecting part; when the worm does not rotate, the rack is fixed relative to the rack.

[0016] Further optionally, the rack is a spur rack extending in a vertical direction; when the gear moves up and down with the spur rack, the main upper connecting portion moves up and down; or,

[0017] The rack is an arc rack, the axis of which is parallel to and higher than the axis of the transmission shaft; when the gear rotates with the arc rack, the main upper connecting part rotates upward or downward.

[0018] Further optionally, the axis of the worm is parallel to the first direction of the vent, and the axis of the transmission shaft is parallel to the second direction of the vent;

[0019] The first direction is one of a length direction and a width direction of the vent, and the second direction is the other of the length direction and the width direction of the vent.

[0020] Further optionally, the first bracket and the second bracket are spaced apart in a direction parallel to the second direction; the worm and the worm wheel are arranged on the side of the first bracket away from the second bracket, and the gear, rack, main lifting arm and slave lifting arm are all arranged between the first bracket and the second bracket.

[0021] Further optionally, the first self-locking transmission member is a screw rod, and the second self-locking transmission member is a nut; the screw rod and the nut are connected in a spiral transmission manner, and the nut is connected to the main upper connecting portion;

[0022] The axis of the screw rod is arranged in the vertical direction. When the screw rod rotates, the nut moves up and down along the vertical direction with the main upper connecting part.

[0023] Further optionally, the first bracket and the second bracket are spaced apart in a third direction, and the third direction is parallel to the length direction or the width direction of the vent;

[0024] The screw rod, nut, main lifting arm and slave lifting arm are all arranged between the first bracket and the second bracket.

[0025] Further optionally, the upper connecting portion is slidably connected to the first bracket, and the lower connecting portion and the main lower connecting portion are both slidably connected to the second bracket;

[0026] The first bracket, the second bracket and the lifting arm assembly are configured such that: when the main upper connecting portion moves upward, the secondary upper connecting portion slides relative to the first bracket and approaches the main upper connecting portion, and the secondary lower connecting portion and the main lower connecting portion both slide relative to the second bracket and cause the second bracket to move downward;

[0027] When the main upper connecting part moves downward, the secondary connecting part slides relative to the first bracket and moves away from the main upper connecting part, and the secondary connecting part and the main lower connecting part both slide relative to the second bracket and move the second bracket upward.

[0028] Further optionally, the first bracket is formed with a first sliding groove, and the second bracket is formed with a second sliding groove; the position of the first sliding groove is higher than the position of the second sliding groove;

[0029] The upper connecting portion is hinged with an upper slider, and the upper slider and the first slide groove are slidably connected; the lower connecting portion is hinged with a lower slider, and the lower slider and the second slide groove are slidably connected; the main lower connecting portion is hinged with a main lower slider, and the main lower slider and the second slide groove are slidably connected.

[0030] Further optionally, the extending direction of the first chute is parallel to the extending direction of the second chute, and the extending direction of the first chute is parallel to the length direction or the width direction of the vent.

[0031] Further optionally, a damping structure is connected between corresponding upper and lower positions of the first bracket and the second bracket, or a damping structure is connected between corresponding upper and lower positions of the main lifting arm and the slave lifting arm, or a damping structure is provided at the hinge between the main lifting arm and the slave lifting arm;

[0032] The damping structure is configured such that: when the grille is at the vent, the damping structure is in a free state; when the grille moves downward away from the vent, the damping structure is in a tensioned state, exerting a damping effect on the grille.

[0033] Further optionally, the damping structure is a damping spring.

[0034] Further optionally, the main lifting arm is formed with a hinge hole at the intersection, and a rotatable hinge shaft is provided in the hinge hole;

[0035] The slave lifting arm includes a first slave lifting arm section and a second slave lifting arm section. In the depth direction of the hinge hole, the first slave lifting arm section and the second slave lifting arm section are relatively arranged on both sides of the main lifting arm; one end of the first slave lifting arm section and one end of the second slave lifting arm section are connected together through the hinge shaft, the other end of the first slave lifting arm section is formed with the upper connecting part, and the other end of the second slave lifting arm section is formed with the lower connecting part.

[0036] Further optionally, the ventilation device further includes a filter, a detection element, and a controller, wherein the filter is provided on the grille for filtering the air flowing through the vent; the detection element is provided on the grille or the second bracket for detecting the deformation of the filter or the amount of dust on the filter;

[0037] The lifting mechanism further includes a driving motor, which is drivingly connected to the self-locking transmission assembly;

[0038] The controller is electrically connected to the detection member and the lifting mechanism, and is used to receive detection data transmitted by the detection member and control the movement of the drive motor.

[0039] The present invention also provides a ceiling unit, including an indoor unit, the indoor unit including a casing and any one of the ventilation devices described above; an air duct is formed inside the casing, the ventilation device is arranged on the casing, and the vent is connected to the air duct.

[0040] Compared with the prior art, the beneficial effects of the present invention are mainly:

[0041] The lifting arm assembly is respectively connected to the self-locking transmission assembly, the first bracket and the second bracket in a transmission manner;

[0042] When the self-locking transmission assembly moves with the lifting arm assembly and moves the second bracket away from the first bracket, the grille moves downward and away from the vent, making it easier to clean the grille; when the self-locking transmission assembly moves with the lifting arm assembly and moves the second bracket close to the first bracket, the grille moves upward and close to the vent, and then the grille is located at the vent, guiding the air flowing through the vent; when the self-locking transmission assembly does not move, the grille can be locked on the panel body under the action of the self-locking transmission assembly and the lifting arm assembly.

[0043] The synergy between the self-locking transmission assembly and the lifting arm assembly enables the grille to be lifted up and down and locked; it is safe and reliable, simplifies the cleaning process, and solves the problems of the lifting mechanism of the grille in the existing roof machine requiring long-term power supply and the grille being unstable when lifting up and down, which leads to electrical safety problems and cumbersome grille cleaning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0045] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0046] Figure 1a 、 Figure 1b and Figure 1cA schematic diagram of the assembly structure of a ventilation device embodiment provided by the present invention;

[0047] Figure 2a for Figure 1a Enlarged view of point A in the middle;

[0048] Figure 2b for Figure 1b Enlarged view of point B in the middle;

[0049] Figure 3 A schematic cross-sectional view of an embodiment of a ventilation device provided by the present invention;

[0050] Figure 4 A schematic diagram of the explosion structure of an embodiment of the ventilation device provided by the present invention;

[0051] Figure 5 A schematic cross-sectional view of an embodiment of a roof lift provided by the present invention;

[0052] In the picture:

[0053] 1- panel body; 11- vent; 12- first bracket; 121- first crossbeam; 122- leg A; 123- leg B; 124- first chute;

[0054] 2-grate; 21-second bracket; 211-second crossbeam; 212-leg C; 213-leg D; 214-second chute; 22-filter;

[0055] 3- self-locking transmission assembly; 31- first self-locking transmission member; 32- second self-locking transmission member; 33- gear; 34- rack; 35- transmission shaft;

[0056] 4 - lifting arm assembly; 41 - main lifting arm; 411 - main upper connecting part; 412 - main lower connecting part; 413 - main lower sliding block; 42 - slave lifting arm; 421 - slave upper connecting part; 422 - slave lower connecting part; 423 - first slave lifting arm section; 424 - second slave lifting arm section; 425 - slave upper sliding block; 426 - slave lower sliding block; 43 - damping spring;

[0057] 5-Testing parts;

[0058] 6-ceiling machine; 61-housing; 62-air duct; 63-fan. DETAILED DESCRIPTION

[0059] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0060] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. "A plurality" generally includes at least two, but does not exclude the inclusion of at least one.

[0061] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0062] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0063] Existing rooftop machines use an "electric push rod mechanism + adjustable buckle" solution to adjust the height of the grille relative to the panel body. However, in this solution, the grille lifting mechanism needs to be energized for a long time and the grille is unstable when it is raised and lowered. This makes the grille cleaning process cumbersome and prone to electrical safety issues.

[0064] The present invention creatively provides a ventilation device, comprising a panel body, a grille, and a lifting mechanism, wherein the panel body is formed with a ventilation opening and provided with a first bracket; the grille is disposed at the ventilation opening and provided with a second bracket; the lifting mechanism comprises a self-locking transmission assembly and a lifting arm assembly, wherein the self-locking transmission assembly is movably disposed on the panel body or the first bracket, and the lifting arm assembly is respectively in transmission connection with the self-locking transmission assembly, the first bracket, and the second bracket;

[0065] When the self-locking transmission assembly moves with the lifting arm assembly and moves the second bracket away from the first bracket, the grille moves downward and away from the vent, making it easier to clean the grille; when the self-locking transmission assembly moves with the lifting arm assembly and moves the second bracket close to the first bracket, the grille moves upward and close to the vent, and then the grille is located at the vent, guiding the air flowing through the vent; when the self-locking transmission assembly does not move, the grille can be locked on the panel body under the action of the self-locking transmission assembly and the lifting arm assembly; the grille can be lifted and lowered stably, which simplifies the process of cleaning the grille.

[0066] Example 1

[0067] like Figures 1a to 4 As shown, this embodiment provides a ventilation device for a rooftop machine 6; the ventilation device includes:

[0068] The panel body 1 is formed with a vent 11, and the panel body 1 is provided with a first bracket 12 at the vent 11; specifically, the first bracket 12 and the panel body 1 are integrally formed or connected by screws;

[0069] The grille 2 is arranged at the vent 11 so as to be able to be raised and lowered; the grille 2 is provided with a second bracket 21;

[0070] The lifting mechanism includes a self-locking transmission assembly 3 and a lifting arm assembly 4. The self-locking transmission assembly 3 is movably arranged on the panel body 1 or the first bracket 12; the lifting arm assembly 4 is respectively connected to the self-locking transmission assembly 3, the first bracket 12 and the second bracket 21;

[0071] The ventilation device is configured such that: when the self-locking transmission assembly 3 moves with the lifting arm assembly 4 and moves the second bracket 21 away from the first bracket 12, the grille 2 moves downward and away from the vent 11; when the grille 2 moves downward to a suitable position, the grille 2 can be cleaned;

[0072] When the self-locking transmission assembly 3 moves with the lifting arm assembly 4 and causes the second bracket 21 to approach the first bracket 12, the grille 2 moves upward and approaches the vent 11; when the grille 2 is located at the vent 11, it can guide the air flowing through the vent 11;

[0073] When the self-locking transmission assembly 3 is not moving, the grille 2 can be locked on the panel body 1 under the action of the self-locking transmission assembly 3 and the lifting arm assembly 4; specifically, when the grille 2 is at the vent 11, the grille 2 is locked on the panel body 1 under the action of the self-locking transmission assembly 3 and the lifting arm assembly 4.

[0074] Specifically, the lifting arm assembly 4 includes a main lifting arm 41 and a slave lifting arm 42 arranged crosswise in the vertical direction, and the main lifting arm 41 and the slave lifting arm 42 are hingedly connected at the intersection; the main lifting arm 41 includes a main upper connecting portion 411 and a main lower connecting portion 412 arranged opposite to each other in the length direction of the main lifting arm 41, and the slave lifting arm 42 includes a slave upper connecting portion 421 and a slave lower connecting portion 422 arranged opposite to each other in the length direction of the slave lifting arm 42; the main upper connecting portion 411 is transmission-connected to the self-locking transmission assembly 3, the slave upper connecting portion 421 acts together with the first bracket 12, and the slave lower connecting portion 422 and the main lower connecting portion 412 both act together with the second bracket 21;

[0075] The ventilation device is configured such that: when the self-locking transmission assembly 3 moves upward with the main upper connecting portion 411, the main upper connecting portion 411 and the slave lower connecting portion 422 move away from each other, the slave lower connecting portion 422 and the main lower connecting portion 412 move closer to each other, the second bracket 21 moves away from the first bracket 12, and the grille 2 moves downward and away from the vent 11;

[0076] When the self-locking transmission assembly 3 moves downward with the main upper connecting portion 411, the main upper connecting portion 411 and the slave lower connecting portion 422 approach each other, and the slave lower connecting portion 422 and the main lower connecting portion 412 move away from each other, the second bracket 21 approaches the first bracket 12, and the grille 2 moves upward and approaches the vent 11.

[0077] When the self-locking transmission assembly 3 is not moving, the second bracket 21 is stationary relative to the first bracket 12;

[0078] By moving the self-locking transmission component, the main lifting arm 41 and the slave lifting arm 42 rotate relative to each other, so that the grille 2 can be lifted up and down, and the movement of the grille 2 is stable; by not moving the self-locking transmission component, the grille 2 is locked on the panel body 1; by the cooperation of the self-locking transmission component and the lifting arm assembly, self-locking when power is off and lifting stability are achieved.

[0079] The following further describes the specific structure of the self-locking transmission assembly 3. The self-locking transmission assembly 3 includes a first self-locking transmission member 31 and a second self-locking transmission member 32. The first self-locking transmission member 31 is rotatably disposed on the panel body 1 or the first bracket 12. The second self-locking transmission member 32 is connected to the first self-locking transmission member 31 through meshing transmission teeth. The second self-locking transmission member 32 is directly or indirectly connected to the main upper connecting portion 411.

[0080] The first self-locking transmission member 31 and the second self-locking transmission member 32 are configured such that when the first self-locking transmission member 31 rotates, the second self-locking transmission member 32 directly or indirectly drives the main upper connecting portion 411 to move upward or downward;

[0081] When the first self-locking transmission member 31 does not rotate, the first self-locking transmission member 31 and the second self-locking transmission member 32 are self-locked, and then the grille 2 is locked on the panel body 1; that is, self-locking is achieved by the transmission teeth of the first self-locking transmission member 31 and the second self-locking transmission member 32, and the self-locking is firm, thereby improving the reliability of the self-locking transmission assembly 3.

[0082] Furthermore, the first self-locking transmission member 31 is a worm, and the second self-locking transmission member 32 is a worm wheel; due to the large friction coefficient between the worm and the worm wheel, the worm wheel cannot drive the worm to rotate, thereby achieving self-locking;

[0083] The self-locking transmission assembly 3 further includes a gear 33 and a rack 34. The gear 33 is rotatably disposed on the panel body 1 or the first bracket 12. The gear 33 and the worm gear are coaxially disposed and connected via a transmission shaft 35. The rack 34 is engaged with the gear 33. The rack 34 is connected to the main upper connecting portion 411. Specifically, the rack 34 and the main upper connecting portion 411 are fixedly connected or hingedly connected, or the rack 34 and the main lifting arm 41 are integrally formed.

[0084] The gear 33 and the rack 34 are configured such that when the worm rotates, the rack 34 moves the main upper connecting portion 411 upward or downward;

[0085] When the worm does not rotate, the rack 34 is fixed relative to the gear 33 , so that the grille 2 is locked on the panel body 1 .

[0086] The lifting mechanism also includes a drive motor, which is arranged on the panel body 1 and is connected to the worm gear. When the drive motor is running, the worm gear rotates, thereby driving the worm wheel to rotate. Specifically, the drive motor and one end of the worm gear are connected through a shaft sleeve.

[0087] When the rack 34 moves, the main upper connecting portion 411 moves up and down, and then the grille 2 moves up and down. The following further describes the specific structure of the rack 34. The rack 34 is a straight rack that extends in the vertical direction. When the gear 33 moves up and down with the straight rack, the main upper connecting portion 411 moves up and down. Or,

[0088] The rack 34 is an arc rack, the axis of which is parallel to and higher than the axis of the transmission shaft 35; when the gear 33 rotates with the arc rack, the main upper connecting part 411 rotates upward or downward; specifically, the gear 33 and the arc rack are externally meshed.

[0089] The following further describes the arrangement of the self-locking transmission assembly 3 . The axis of the worm is parallel to the first direction of the vent 11 , and the axis of the transmission shaft 35 is parallel to the second direction of the vent 11 .

[0090] The first direction is one of the length direction and the width direction of the vent 11 , and the second direction is the other of the length direction and the width direction of the vent 11 .

[0091] Furthermore, the first bracket 12 and the second bracket 21 are spaced apart in a direction parallel to the second direction; the worm and the worm wheel are arranged on the side of the first bracket 12 away from the second bracket 21, and the gear 33, the rack 34, the main lifting arm 41 and the slave lifting arm 42 are all arranged between the first bracket 12 and the second bracket 21.

[0092] Preferably, the first direction is the length direction of the vent 11, and the second direction is the width direction of the vent 11;

[0093] The self-locking transmission assembly 3 is arranged above the vent 11 and is arranged on the same side of the vent 11 in the longitudinal direction; the axis of the worm is parallel to the longitudinal direction of the vent 11, and the axis of the transmission shaft 35 is parallel to the width direction of the vent 11;

[0094] When the rack 34 is an arc rack, the arc rack rotates, bringing the main upper connecting portion 411 toward the side and upward.

[0095] The following further describes the connection between the lifting arm assembly 4 and the first bracket 12 and the second bracket 21. The upper connecting portion 421 and the first bracket 12 are slidably connected, and the lower connecting portion 422 and the main lower connecting portion 412 are both slidably connected to the second bracket 21.

[0096] The first bracket 12, the second bracket 21 and the lifting arm assembly 4 are configured such that: when the main upper connecting portion 411 moves upward, the upper connecting portion 421 slides relative to the first bracket 12 and approaches the main upper connecting portion 411, and the lower connecting portion 422 and the main lower connecting portion 412 both slide relative to the second bracket 21, and the lower connecting portion 422 and the main lower connecting portion 412 approach each other and cause the second bracket 21 to move downward;

[0097] When the main upper connection part 411 moves downward, the upper connection part 421 slides relative to the first bracket 12 and moves away from the main upper connection part 411, and the lower connection part 422 and the main lower connection part 412 both slide relative to the second bracket 21, and the lower connection part 422 and the main lower connection part 412 move away from each other and cause the second bracket 21 to move upward.

[0098] Furthermore, the first bracket 12 is formed with a first sliding groove 124, and the second bracket 21 is formed with a second sliding groove 214; the position of the first sliding groove 124 is higher than the position of the second sliding groove 214;

[0099] The upper connecting portion 421 is hingedly connected to an upper slider 425, which is slidably connected to the first slide groove 124; the lower connecting portion 422 is hingedly connected to a lower slider 426, which is slidably connected to the second slide groove 214; the main lower connecting portion 412 is hingedly connected to a main lower slider 413, which is slidably connected to the second slide groove 214;

[0100] When the main upper connecting portion 411 moves upward, the upper slider 425 and the upper connecting portion 421 rotate relative to each other, and the upper slider 425 slides along the first sliding groove 124 and approaches the main upper connecting portion 411; the lower slider 426 and the lower connecting portion 422 rotate relative to each other, and the main lower slider 413 and the main lower connecting portion 412 rotate relative to each other, and the lower slider 426 and the main lower slider 413 both slide along the second sliding groove 214 and approach each other;

[0101] When the main upper connecting part 411 moves downward, the upper slider 425 and the upper connecting part 421 rotate relative to each other, and the upper slider 425 slides along the first sliding groove 124 and moves away from the main upper connecting part 411; the lower slider 426 and the lower connecting part 422 rotate relative to each other, the main lower slider 413 and the main lower connecting part 412 rotate relative to each other, and the lower slider 426 and the main lower slider 413 both slide along the second sliding groove 214 and move away from each other.

[0102] Specifically, the extension direction of the first chute 124 is parallel to the extension direction of the second chute 214 , and the extension direction of the first chute 124 is parallel to the length direction or width direction of the vent 11 ;

[0103] Preferably, the extension direction of the first sliding groove 124 is parallel to the length direction of the vent 11 .

[0104] The following further describes the structure required for adjusting the speed when the grille 2 is raised and lowered. A damping structure is connected between corresponding upper and lower positions of the first bracket 12 and the second bracket 21, or a damping structure is connected between corresponding upper and lower positions of the main lifting arm 41 and the secondary lifting arm 42, or a damping structure is provided at the hinge between the main lifting arm 41 and the secondary lifting arm 42.

[0105] The damping structure is configured as follows: when the grille 2 is at the vent 11, the damping structure is in a free state (unstressed state); when the grille 2 moves downward away from the vent 11, the damping structure is in a tensioned state, which has a damping effect on the grille 2; the speed of the grille 2 when it is raised and lowered is reduced to ensure the stable movement of the grille 2 and avoid the problem of the grille 2 moving too fast when it is raised and lowered.

[0106] Preferably, the damping structure is a damping spring 43;

[0107] Specifically, the damping spring 43 includes a tension spring and a torsion spring; a tension spring is connected between the upper and lower corresponding positions of the first bracket 12 and the second bracket 21, or a tension spring is connected between the upper and lower corresponding positions of the main lifting arm 41 and the slave lifting arm 42, or a torsion spring is provided at the hinge of the main lifting arm 41 and the slave lifting arm 42; when the skylight machine 6 is working normally, the damping spring 43 is at its original length, and when the grille 2 descends, the damping spring 43 is in an elongated state, generating elastic force to limit the movement speed of the grille 2.

[0108] The following further describes the specific structure of the first bracket 12 and the second bracket 21. The first bracket 12 and the second bracket 21 extend in a direction parallel to the length direction of the vent 11 as a whole. The first bracket 12 and the second bracket 21 are both U-shaped structures; the first bracket 12 includes a first beam 121, a leg A122 and a leg B123, and the leg A122 and the leg B123 are relatively arranged on both sides of the length direction of the first beam 121; the leg A122 connects the panel body 1 and one end of the first beam 121, and the leg B123 connects the panel body 1 and the other end of the first beam 121. one end; the first beam 121 is located above the vent 11 and is formed with a first slide groove 124; the second bracket 21 includes a second beam 211, a leg C212 and a leg D213, and the leg C212 and the leg D213 are relatively arranged on both sides of the length direction of the second beam 211; the leg C212 connects the panel body 1 and one end of the second beam 211, and the leg D213 connects the panel body 1 and the other end of the second beam 211; the second beam 211 is located above the vent 11 and is formed with a second slide groove 214; the first beam 121 is located above the second beam 211.

[0109] The following further describes the specific structure of the slave lifting arm 42. The main lifting arm 41 has a hinge hole formed at the intersection, and a rotatable hinge shaft is provided in the hinge hole;

[0110] The slave lifting arm 42 includes a first slave lifting arm section 423 and a second slave lifting arm section 424. The first slave lifting arm section 423 and the second slave lifting arm section 424 are arranged opposite each other on either side of the main lifting arm 41 in the depth direction of the hinge hole. One end of the first slave lifting arm section 423 and one end of the second slave lifting arm section 424 are connected together by a hinge shaft. The other end of the first slave lifting arm section 423 is formed with an upper connecting portion 421, and the other end of the second slave lifting arm section 424 is formed with a lower connecting portion 422. In other words, the first slave lifting arm section 423 and the second slave lifting arm section 424 are arranged opposite each other in a direction parallel to the width direction of the vent 11.

[0111] In this way, the main lifting arm 41 and the secondary lifting arm 42 form a scissor-type structure, and the main lifting arm 41, the second secondary lifting arm section 424 and the second bracket 21 form a triangular structure with a variable bottom side length, which effectively ensures the stability of the panel grille 2 when it is lifted up and down.

[0112] To address the problem that the degree of contamination of the filter 22 cannot be automatically detected and the filter 22 cannot be cleaned in a timely manner, this embodiment proposes that the ventilation device further includes a filter 22, a detection member 5, and a controller. The filter 22 is provided on the grille 2 and is used to filter the air flowing through the vent 11. The detection member 5 is provided on the grille 2 or the second bracket 21 and is used to detect the deformation of the filter 22 or the amount of dust on the filter 22.

[0113] The lifting mechanism also includes a drive motor, which is driven and connected to the self-locking transmission assembly 3;

[0114] The controller is electrically connected to the detection member 5 and the lifting mechanism, and is used to receive detection data transmitted by the detection member 5 and control the movement of the drive motor according to the detection data of the detection member 5.

[0115] Preferably, the detection member 5 is a deflection sensor, which is used to detect the deformation and deflection value of the filter 22 after dust accumulation, and then control the operation of the drive motor to achieve real-time monitoring and automatic control, avoiding the need for manual judgment on whether the filter 22 needs to be cleaned;

[0116] When the deflection value of the filter screen 22 reaches the maximum critical value, the drive motor is operated to move the grille 2 downward; when the deflection value of the filter screen 22 reaches the minimum critical value, the drive motor is operated to move the grille 2 upward.

[0117] like Figure 5 As shown, this embodiment also provides a ceiling unit 6, including an indoor unit, the indoor unit including a casing and any of the above-mentioned ventilation devices; an air duct 62 is formed inside the casing, the ventilation device is arranged on the casing, and the vent 11 is connected to the air duct 62.

[0118] To sum up, the snap-fit ​​structure between the panel body 1 and the grille 2 is eliminated, and the worm gear and worm are self-locking, which solves the problem of the existing skylight machine 6 requiring long-term power supply and the need for the snap-fit ​​structure to cooperate; the deflection value of the filter screen 22 is detected by the deflection sensor, and then the operation of the drive motor is controlled to achieve real-time monitoring and intelligent control; the main lifting arm 41 and the slave lifting arm 42 form a scissor-type structure, which improves the stability of the grille 2 when it is raised and lowered.

[0119] Example 2

[0120] Different from the first embodiment, the present embodiment proposes that the first self-locking transmission member 31 is a screw, and the second self-locking transmission member 32 is a nut; the screw and the nut are connected in a spiral transmission manner, and the nut is connected to the main upper connecting portion 411; the axis of the screw is arranged in the vertical direction;

[0121] The screw rod and the nut are configured such that when the screw rod rotates, the nut moves the main upper connecting portion 411 up and down in the vertical direction; when the screw rod does not rotate, the screw rod and the nut are locked, so that the grille 2 is locked on the panel body 1.

[0122] Furthermore, the first bracket 12 and the second bracket 21 are spaced apart in a third direction, and the third direction is parallel to the length direction or the width direction of the vent 11;

[0123] The lead screw, the nut, the main lifting arm 41 and the slave lifting arm 42 are all arranged between the first bracket 12 and the second bracket 21 .

[0124] Preferably, the first bracket 12 and the second bracket 21 are spaced apart from each other in a direction parallel to the width direction of the vent 11 .

[0125] It should be noted that the names of the legs A122, B123, C212 and D213 are for distinguishing the legs at different positions, and are not intended to limit the structure and function of the legs.

[0126] While the exemplary embodiments of the present disclosure have been specifically illustrated and described above, it should be understood that the present disclosure is not limited to the detailed structures, configurations, or implementations described herein; rather, the present disclosure is intended to encompass various modifications and equivalent configurations within the spirit and scope of the appended claims.

Claims

1. A ventilation device for a rooftop machine (6); characterized in that, The ventilation device comprises: A panel body (1) is formed with a vent (11), and the panel body (1) is provided with a first bracket (12) at the vent (11); A grille (2) is arranged at the vent (11) so as to be movable up and down; the grille (2) is provided with a second bracket (21); A lifting mechanism comprising a self-locking transmission assembly (3) and a lifting arm assembly (4); the self-locking transmission assembly (3) is movably arranged on the panel body (1) or the first bracket (12); the lifting arm assembly (4) is respectively connected to the self-locking transmission assembly (3), the first bracket (12) and the second bracket (21); The ventilation device is configured as follows: when the self-locking transmission component (3) moves with the lifting arm component (4) and moves the second bracket (21) away from the first bracket (12), the grille (2) moves downward and away from the vent (11); when the self-locking transmission component (3) moves with the lifting arm component (4) and moves the second bracket (21) close to the first bracket (12), the grille (2) moves upward and close to the vent (11); when the self-locking transmission component (3) does not move, the grille (2) can be locked on the panel body (1) under the action of the self-locking transmission component (3) and the lifting arm component (4).

2. The ventilation device according to claim 1, characterized in that The lifting arm assembly (4) comprises a main lifting arm (41) and a slave lifting arm (42) arranged crosswise in a vertical direction, wherein the main lifting arm (41) and the slave lifting arm (42) are hingedly connected at the intersection; the main lifting arm (41) comprises a main upper connecting portion (411) and a main lower connecting portion (412), and the slave lifting arm (42) comprises a slave upper connecting portion (421) and a slave lower connecting portion (422); the main upper connecting portion (411) is in transmission connection with the self-locking transmission assembly (3), the slave upper connecting portion (421) and the first bracket (12) act together, and the slave lower connecting portion (422) and the main lower connecting portion (412) both act together with the second bracket (21); The ventilation device is configured such that: when the self-locking transmission assembly (3) moves upward with the main upper connecting portion (411), the second bracket (21) moves away from the first bracket (12); when the self-locking transmission assembly (3) moves downward with the main upper connecting portion (411), the second bracket (21) approaches the first bracket (12); and when the self-locking transmission assembly (3) does not move, the second bracket (21) remains stationary relative to the first bracket (12).

3. The ventilation device according to claim 2, characterized in that The self-locking transmission assembly (3) comprises a first self-locking transmission member (31) and a second self-locking transmission member (32); the first self-locking transmission member (31) is rotatably arranged on the panel body (1) or the first bracket (12); the second self-locking transmission member (32) and the first self-locking transmission member (31) are connected to each other via transmission teeth; the second self-locking transmission member (32) and the main upper connecting portion (411) are directly or indirectly connected; The first self-locking transmission member (31) and the second self-locking transmission member (32) are configured such that: when the first self-locking transmission member (31) rotates, the second self-locking transmission member (32) directly or indirectly drives the main upper connecting portion (411) to move upward or downward; when the first self-locking transmission member (31) does not rotate, the first self-locking transmission member (31) and the second self-locking transmission member (32) self-lock, thereby locking the grille (2) to the panel body (1).

4. The ventilation device according to claim 3, characterized in that The first self-locking transmission member (31) is a worm, and the second self-locking transmission member (32) is a worm wheel; The self-locking transmission assembly (3) further comprises a gear (33) and a rack (34); the gear (33) is rotatably arranged on the panel body (1) or the first bracket (12); the gear (33) and the worm gear are coaxially arranged and connected via a transmission shaft (35); the rack (34) and the gear (33) are meshed, and the rack (34) is connected to the main upper connecting portion (411); The gear (33) and the rack (34) are configured such that: when the worm rotates, the rack (34) moves the main upper connecting portion (411) upward or downward; when the worm does not rotate, the rack (34) is fixed relative to the gear (33).

5. The ventilation device according to claim 4, characterized in that The rack (34) is a straight rack extending in a vertical direction; when the gear (33) moves up and down with the straight rack, the main upper connecting portion (411) moves up and down; or, The rack (34) is a circular arc rack, the axis of which is parallel to and higher than the axis of the transmission shaft (35); when the gear (33) rotates with the circular arc rack, the main upper connecting part (411) rotates upward or downward.

6. The ventilation device according to claim 4, characterized in that The axis of the worm is parallel to a first direction of the vent (11), and the axis of the transmission shaft (35) is parallel to a second direction of the vent (11); The first direction is one of the length direction and the width direction of the vent (11), and the second direction is the other of the length direction and the width direction of the vent (11).

7. The ventilation device according to claim 6, characterized in that The first bracket (12) and the second bracket (21) are spaced apart in a direction parallel to the second direction; the worm and the worm wheel are arranged on a side of the first bracket (12) away from the second bracket (21); and the gear (33), the rack (34), the main lifting arm (41) and the slave lifting arm (42) are all arranged between the first bracket (12) and the second bracket (21).

8. The ventilation device according to claim 3, characterized in that The first self-locking transmission member (31) is a screw rod, and the second self-locking transmission member (32) is a nut; the axis of the screw rod is arranged in a vertical direction, the screw rod and the nut are connected in a spiral transmission manner, and the nut is connected to the main upper connecting portion (411); The screw rod and the nut are configured such that: when the screw rod rotates, the nut moves up and down along the vertical direction with the main upper connecting portion (411); when the screw rod does not rotate, the screw rod and the nut are locked.

9. The ventilation device according to claim 8, characterized in that The first bracket (12) and the second bracket (21) are spaced apart in a third direction, and the third direction is parallel to the length direction or the width direction of the vent (11); The screw rod, nut, main lifting arm (41) and slave lifting arm (42) are all arranged between the first bracket (12) and the second bracket (21).

10. The ventilation device according to claim 2, characterized in that The upper connecting portion (421) is slidably connected to the first bracket (12), and the lower connecting portion (422) and the main lower connecting portion (412) are both slidably connected to the second bracket (21); The first bracket (12), the second bracket (21) and the lifting arm assembly (4) are configured as follows: when the main upper connecting part (411) moves upward, the upper connecting part (421) slides relative to the first bracket (12) and approaches the main upper connecting part (411), and the lower connecting part (422) and the main lower connecting part (412) both slide relative to the second bracket (21) and cause the second bracket (21) to move downward; when the main upper connecting part (411) moves downward, the upper connecting part (421) slides relative to the first bracket (12) and moves away from the main upper connecting part (411), and the lower connecting part (422) and the main lower connecting part (412) both slide relative to the second bracket (21) and cause the second bracket (21) to move upward.

11. The ventilation device according to claim 10, characterized in that The first bracket (12) is formed with a first sliding groove (124), and the second bracket (21) is formed with a second sliding groove (214); the position of the first sliding groove (124) is higher than the position of the second sliding groove (214); The upper connecting portion (421) is hingedly connected to an upper slider (425), and the upper slider (425) and the first slide groove (124) are slidably connected; the lower connecting portion (422) is hingedly connected to a lower slider (426), and the lower slider (426) and the second slide groove (214) are slidably connected; the main lower connecting portion (412) is hingedly connected to a main lower slider (413), and the main lower slider (413) and the second slide groove (214) are slidably connected.

12. The ventilation device according to claim 11, characterized in that The extension direction of the first slide groove (124) is parallel to the extension direction of the second slide groove (214), and the extension direction of the first slide groove (124) is parallel to the length direction or width direction of the vent (11).

13. The ventilation device according to claim 2, characterized in that A damping structure is connected between upper and lower corresponding positions of the first bracket (12) and the second bracket (21), or a damping structure is connected between upper and lower corresponding positions of the main lifting arm (41) and the slave lifting arm (42), or a damping structure is provided at a hinge between the main lifting arm (41) and the slave lifting arm (42); The damping structure is configured such that: when the grille (2) is at the vent (11), the damping structure is in a free state; when the grille (2) moves downward away from the vent (11), the damping structure is in a tensioned state, exerting a damping effect on the grille (2).

14. The ventilation device according to claim 13, characterized in that The damping structure is a damping spring (43).

15. The ventilation device according to claim 2, characterized in that The main lifting arm (41) is formed with a hinge hole at the intersection, and a rotatable hinge shaft is provided in the hinge hole; The slave lifting arm (42) includes a first slave lifting arm section (423) and a second slave lifting arm section (424). In the depth direction of the hinge hole, the first slave lifting arm section (423) and the second slave lifting arm section (424) are relatively arranged on both sides of the main lifting arm (41); one end of the first slave lifting arm section (423) and one end of the second slave lifting arm section (424) are connected together through the hinge shaft, the other end of the first slave lifting arm section (423) is formed with the upper connecting portion (421), and the other end of the second slave lifting arm section (424) is formed with the lower connecting portion (422).

16. The ventilation device according to claim 2, characterized in that The ventilation device further comprises a filter (22), a detection element (5) and a controller; the filter (22) is arranged on the grille (2) and is used to filter the air flowing through the vent (11); the detection element (5) is arranged on the grille (2) or the second bracket (21) and is used to detect the deformation of the filter (22) or the amount of dust on the filter (22); The lifting mechanism further comprises a driving motor, which is drivingly connected to the self-locking transmission assembly (3); The controller, the detection member (5), and the lifting mechanism are all electrically connected and are used to receive detection data transmitted by the detection member (5) and control the movement of the drive motor.

17. A roof crane, characterized in that: The indoor unit comprises a casing and the ventilation device according to any one of claims 1 to 16; an air duct (62) is formed inside the casing, the ventilation device is arranged on the casing, and the vent (11) and the air duct (62) are connected.

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