Lifting / lowering type embedded range hood

Abstract

The present application relates to the technical field of range hoods, and specifically relates to a lifting / lowering type embedded range hood, comprising: a fume gathering cover, used for gathering and suctioning and exhausting fume; a lifting / lowering box, connected to the top of the fume gathering cover and communicated with the interior of the fume gathering cover; a main box, embedded in a cabinet, the lifting / lowering box being sleeved on the main box and being in sliding fit with the main box; a lifting / lowering driving mechanism, provided on the main box and connected to the lifting / lowering box, and used for driving the lifting / lowering box to ascend and descend relative to the main box; a sliding rail assembly, provided between the main box and the lifting / lowering box; limiting microswitches each provided with a triggering head, the limiting microswitches being provided on the main box, electrically connected to the lifting / lowering driving mechanism and used for controlling the lifting / lowering driving mechanism to stop operating; and position shifting members, provided on the lifting / lowering box and used for abutting against the triggering heads so as to enable the limiting microswitches to carry out a power-off action. The range hood of the present application has an automatic lifting / lowering function, and the distance between the range hood and the countertop can be adjusted, thereby improving the fume suction and exhaust effect of the range hood.

Description

Lift-type built-in range hood

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 5, 2023, with application number 202311140172.4 and application name “Lifting type embedded range hood”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the technical field of range hoods, and specifically relates to a lifting-type embedded range hood. Background Art

[0003] A range hood is an electrical appliance used to remove fumes produced during cooking.

[0004] In order to increase the beauty and simplicity of the kitchen, some range hoods are embedded in the cabinets, which are called embedded range hoods.

[0005] Most of the built-in range hoods on the market are semi-embedded or completely installed inside the cabinet. If the cabinet is installed at a high height, the range hood will be far away from the stove, which will result in poor smoke suction and exhaust effects.

[0006] Summary of the Invention

[0007] In order to solve the above-mentioned problems in the prior art, that is, to improve the smoke suction and exhaust effects of the range hood, the present application provides a lifting-type embedded range hood. The range hood has a lifting function, and the distance between the range hood and the stove can be adjusted, thereby improving the smoke suction and exhaust effects of the range hood and avoiding the problem of poor smoke suction and exhaust effects of the range hood due to the high installation height of the cabinet.

[0008] The embodiment of the present application provides a lifting-type embedded range hood, comprising: a smoke hood, arranged on the top of the stove, for collecting and exhausting oil smoke; a lifting box, connected to the top of the smoke hood and communicating with the inside of the smoke hood; a main box, embedded and arranged inside the cabinet, the lifting box being sleeved on the main box and slidingly matched with the main box; a lifting drive mechanism, arranged on the main box and connected to the lifting box, the lifting drive mechanism being used to drive the lifting box to perform lifting movement relative to the main box; a slide rail assembly, arranged between the main box and the lifting box, the slide rail assembly simultaneously connecting the main box and the lifting box, for allowing the lifting box to perform smooth lifting movement relative to the main box; a limit microswitch having a trigger head, the limit microswitch being arranged on the main box, electrically connected to the lifting drive mechanism, and for controlling the lifting drive mechanism to stop operating; a position paddle, arranged on the lifting box, for abutting against the trigger head to cause the limit microswitch to perform a power-off action.

[0009] By adopting the above technical solution, the lifting drive mechanism can drive the lifting box to smoothly lift and lower relative to the main box. During this process, the slide rail assembly smoothly guides and laterally supports the lifting box. When the position paddle contacts and squeezes the trigger head and causes the limit microswitch to cut off the power, the lifting drive mechanism can be automatically stopped, thereby achieving the automatic stop and maintenance of the lifting box. The lifting embedded range hood provided in this application has an automatic lifting function and can freely adjust the distance between the range hood and the stove, thereby improving the smoke suction and exhaust effect of the range hood and avoiding the problem of poor smoke suction and exhaust effect of the range hood due to the high installation height of the cabinet.

[0010] In the optional technical solution of the above-mentioned lifting-type embedded range hood, a screw mounting part is provided on the main box, the screw mounting part has a receiving groove, and an ear seat is provided in the receiving groove; the lifting drive mechanism includes a lifting drive motor, a screw and a lifting drive part; the screw and the lifting drive part are both arranged in the receiving groove, the bottom end of the screw is inserted into the ear seat and rotatably cooperates with the ear seat, the top end of the screw is fixedly connected to the output shaft of the lifting drive motor, and the lifting drive motor is connected to the main box; the lifting drive part is sleeved on the screw and threadedly cooperates with the screw, and the lifting drive part is connected to the lifting box; the lifting drive motor is used to drive the lifting box to perform lifting and lowering movements relative to the main box through the screw and the lifting drive part.

[0011] By adopting this technical solution, the screw and lift drive are both located within the receiving slot within the screw mounting member. The lift drive mechanism does not occupy the gap between the main housing and the lift housing, making the range hood structure more compact, simple, and aesthetically pleasing. The lift drive motor rotates the screw, which in turn drives the lift drive member up and down along its axis. The lift drive member then raises and lowers the lift housing relative to the main housing, enabling quick and precise adjustment of the range hood's distance from the cooktop.

[0012] In the optional technical solution of the above-mentioned lifting type embedded range hood, it also includes a sliding rail assembly arranged between the main box and the lifting box, and the sliding rail assembly includes angle iron and sliding rails; the angle iron is arranged on the inner wall of the lifting box; the sliding rail includes an inner rail and an outer rail that slide with each other, any one of the inner rail and the outer rail is connected to the main box, and the other is connected to the lifting box.

[0013] By adopting the above technical solution, when the lifting box is lifted relative to the main box, the inner rail and the outer rail slide relative to each other, and the slide rail assembly can guide and laterally support the lifting box, so that the lifting movement of the lifting box is stable and smooth.

[0014] In the optional technical solution of the above-mentioned lifting type embedded range hood, a switch bracket for fixing the limit micro switch is also provided on the main box, and the switch bracket has two corresponding limit surfaces, and the two limit surfaces are used to respectively press against the top and bottom surfaces of the limit micro switch.

[0015] By adopting the above technical solution, the two opposite limit surfaces of the switch bracket tightly abut the top and bottom surfaces of the limit micro switch respectively, and the switch bracket semi-encloses the non-working surface of the limit micro switch, making the installation of the limit micro switch more stable.

[0016] In the optional technical solution of the above-mentioned lifting embedded range hood, a positioning column is provided on the switch bracket, and a positioning hole is correspondingly provided in the limit micro switch. The positioning column is inserted into the positioning hole and plugged into the limit micro switch.

[0017] By adopting the above technical solution, the switch bracket realizes completely fixed installation of the limit micro switch through the plug-in cooperation of the positioning column on the switch bracket and the positioning hole on the limit micro switch.

[0018] In the optional technical solution of the above-mentioned lifting type embedded range hood, the side surface of the position paddle for contacting with the trigger head is configured to be a smooth convex arc surface.

[0019] By adopting the above technical solution, in the process of the position paddle gradually contacting the trigger head, the smooth convex arc surface of the position paddle and the trigger head contacts more smoothly, and the contact stress between the position paddle and the trigger head is small, which can extend the service life of the position paddle and the trigger head.

[0020] In an optional technical solution of the above-mentioned lifting-type embedded range hood, the trigger head is rotatably connected to a pulley, and the pulley is used to roll and abut against the position paddle.

[0021] By adopting the above technical solution, the pulley makes the contact mode between the position paddle and the trigger head a rolling contact mode, the contact between the position paddle and the trigger head is smoother, and the contact stress between the position paddle and the trigger head is small, which can extend the service life of the position paddle and the trigger head.

[0022] In the optional technical solution of the above-mentioned lifting embedded range hood, a limit micro switch wire protection cover is provided on the outer wall of the main box, and the limit micro switch wire protection cover is used to lay the wires for supplying power to the limit micro switch.

[0023] By adopting the above technical solution, the limit micro switch wire protection cover can protect the wires that supply power to the limit micro switch.

[0024] In the optional technical solution of the above-mentioned lifting type embedded range hood, it also includes a front guide rail column arranged between the main box and the lifting box, the front guide rail column is connected to the inner wall of the lifting box, and the front guide rail column is slidably matched with the main box.

[0025] By adopting the above technical solution, when the lifting box is lifted relative to the main box, the front guide rail column can guide and laterally support the lifting box, so that the lifting movement of the lifting box is stable and smooth.

[0026] In the optional technical solution of the above-mentioned lifting type embedded range hood, it also includes an internal wire protection cover arranged between the main box and the lifting box, the internal wire protection cover is connected to the inner wall of the lifting box and slides with the main box, and the internal wire protection cover is used for laying wires.

[0027] By adopting the above technical solution, the internal wire protection cover has two functions. One is to lay the wires and thus protect the wires; the other is that when the lifting box is lifted or lowered relative to the main box, the internal wire protection cover can guide and laterally support the lifting box, so that the lifting movement of the lifting box is stable and smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings herein are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] FIG1 is a schematic structural diagram of a lift-type embedded range hood provided in an embodiment of the present application;

[0030] FIG2 is a structural diagram of a main embodiment of a lifting drive mechanism of a hidden lifting box rear plate provided in an embodiment of the present application;

[0031] FIG3 is a schematic diagram of the structure of the interior of the lifting box after the lifting box is hidden according to an embodiment of the present application;

[0032] FIG4 is an exploded view of a slide rail assembly provided in an embodiment of the present application;

[0033] FIG5 is an exploded view of the limit micro switch and the switch bracket provided in an embodiment of the present application.

[0034] Reference numerals:

[0035] 100-main box; 110-screw mounting; 120-ear seat;

[0036] 200-lift box; 210-front guide rail column; 220-inner wire protection cover; 230-bottom wiring harness adapter;

[0037] 300-fume hood;

[0038] 400-lifting drive mechanism; 410-lifting drive motor; 420-screw; 430-lifting drive member;

[0039] 500-slide rail assembly; 510-angle iron; 520-slide rail; 521-inner rail; 522-outer rail;

[0040] 600-Limit micro switch; 610-Trigger head; 620-Pulley; 630-Positioning hole; 640-Limit micro switch wire cover;

[0041] 700- switch bracket; 710- limit surface; 720- positioning column;

[0042] 800-position paddle; 810-paddle mounting plate.

[0043] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] The terms "first," "second," "third," "fourth," and so on (if any) in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the application described herein can, for example, be implemented in orders other than those illustrated or described herein.

[0046] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be interpreted as being more optional or more advantageous than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete way.

[0047] As mentioned above in the background technology, embedded range hoods have appeared on the market, but most of them are semi-embedded or completely installed inside the cabinet. If the cabinet is installed at a high height, the range hood will be far away from the stove, which will result in poor smoke suction and exhaust effect of the range hood.

[0048] Therefore, in order to improve or solve the above-mentioned technical problems, the embodiment of the present application provides a lifting-type embedded range hood. The technical solution provided in the embodiment of the present application includes a smoke hood, a lifting box and a main box. The smoke hood is used to gather and exhaust oil smoke. The lifting box is connected to the top of the smoke hood and is connected to the inside of the smoke hood. The main box is embedded in the cabinet. The lifting box is sleeved on the main box and slides with the main box. A lifting drive mechanism is provided on the main box. The lifting drive mechanism is used to drive the lifting box to automatically lift and lower relative to the main box. The distance between the range hood and the stove can be freely adjusted, thereby improving the smoke suction and exhaust effect of the range hood and avoiding the problem of poor smoke suction and exhaust effect of the range hood due to the high installation height of the cabinet.

[0049] The following describes in detail the lifting type embedded range hood provided in the embodiment of the present application with reference to Figures 1 to 5.

[0050] FIG1 is a schematic structural diagram of a lift-type embedded range hood provided by an embodiment of the present application, and FIG2 is a schematic structural diagram of a main embodiment of a lift drive mechanism of a hidden lift box rear plate provided by an embodiment of the present application. Referring to FIG1 and FIG2 , an embodiment of the present application provides a lift-type embedded range hood, comprising a smoke hood 300, a lift box 200 and a main box 100; the smoke hood 300 is used to collect and absorb oil smoke, the lift box 200 is fixedly connected to the top of the smoke hood 300 and is connected to the inside of the smoke hood 300, the main box 100 is embedded and installed inside the cabinet, the lift box 200 is sleeved on the main box 100 and slidably cooperates with the main box 100; a lift drive mechanism 400 is provided on the back side of the main box 100, the lift drive mechanism 400 is connected to the back side plate of the lift box 200, and the lift drive mechanism 400 is used to drive the lift box 200 to automatically perform lifting and lowering motion relative to the main box 100.

[0051] Specifically, the lifting drive mechanism 400 drives the lifting box 200 to smoothly lift and lower relative to the main box 100. When the smoke hood 300 reaches the desired height, the lifting drive mechanism 400 stops operating, thereby automatically stopping and maintaining the smoke hood 300. The lifting built-in range hood provided in the embodiment of the present application has an automatic lifting function, which allows the range hood to be freely adjusted in distance from the stove, thereby improving the range hood's smoke extraction and exhaust performance, and avoiding the problem of poor smoke extraction and exhaust performance caused by the high installation height of the cabinet.

[0052] Please refer to Figure 2. In some embodiments provided in the present application, for example, the back of the main box 100 is fixedly connected with a long strip of screw mounting part 110, the screw mounting part 110 is a sheet metal part, and the screw mounting part 110 itself has a receiving groove, and the bottom of the receiving groove is fixedly connected to the ear seat 120 at the bottom of the screw mounting part 110 by screws.

[0053] Please refer to Figure 2. The lifting drive mechanism 400 includes a lifting drive motor 410, a screw rod 420 and a lifting drive member 430; the screw rod 420 and the lifting drive member 430 are both arranged in the accommodating groove, the bottom end of the screw rod 420 is inserted into the ear seat 120 and rotates with the ear seat 120, the top end of the screw rod 420 passes through the top plate of the main box 100 and is fixedly connected to the output shaft of the lifting drive motor 410, and the lifting drive motor 410 is fixedly connected to the outer surface of the top plate of the main box 100 by screws; the lifting drive member 430 is sleeved with the screw rod 420 and threadedly engaged with the screw rod 420, and the lifting drive member 430 is fixedly connected to the back side panel of the lifting box 200 by screws.

[0054] Specifically, the lifting drive motor 410 drives the screw rod 420 to rotate, the screw rod 420 drives the lifting drive member 430 to move up and down along the axis of the screw rod 420, and the lifting drive member 430 drives the lifting box 200 to move up and down relative to the main box 100, thereby quickly and accurately realizing the free adjustment of the distance between the range hood and the stove.

[0055] Figure 3 is a schematic diagram of the interior of the lift box after the lift box is hidden, according to an embodiment of the present application; Figure 4 is an exploded view of the slide rail assembly, according to an embodiment of the present application. Referring to Figures 2, 3, and 4, in some embodiments provided herein, a slide rail assembly 500 is provided between the main box 100 and the lift box 200, for example. The slide rail assembly 500 includes angle irons 510 and slide rails 520. The angle irons 510 are fixedly connected to the left and right inner corners of the back of the lift box 200 by screws, and the slide rails 520 connect both the main box 100 and the angle irons 510.

[0056] Please refer to Figures 2 and 3. In some embodiments provided in the present application, for example, the inner walls on both sides of the lifting box 200 are fixed with internal wire protection covers 220 by screws. The internal wire protection covers 220 are located between the side panels of the lifting box 200 and the angle iron 510. The internal wire protection covers 220 are close to the angle iron 510 and cover a part of the angle iron 510. The internal wire protection covers 220 are used for laying wires.

[0057] Specifically, the internal wire protection cover 220 has two functions. One is to lay the wires and thus protect the wires; the other is that when the lifting box 200 is lifted or lowered relative to the main box 100, the internal wire protection cover 220 can guide and laterally support the lifting box 200, so that the lifting movement of the lifting box 200 is stable and smooth.

[0058] In some embodiments provided herein, front guide rails 210 are provided between the main box 100 and the lifting box 200. Front guide rails 210 are located on the left and right sides of the front portion of the lifting box 200. Front guide rails 210 are fixedly connected to the inner wall of the lifting box 200 via screws, and the front guide rails 210 and the main box 100 are slidably engaged. Specifically, when the lifting box 200 is raised or lowered relative to the main box 100, the front guide rails 210 guide and laterally support the lifting box 200, ensuring stable and smooth lifting motion of the lifting box 200.

[0059] Referring to Figures 3 and 4 , in some embodiments provided herein, the slide rail 520 illustratively includes an inner rail 521 and an outer rail 522 that slidably engage with each other. The inner rail 521 is fixedly connected to the angle iron 510 via screws, while the outer rail 522 is fixedly connected to the side panels of the lifting box 200 via screws. Specifically, when the lifting box 200 is raised or lowered relative to the main box 100, the inner rail 521 and the outer rail 522 slide relative to each other. The slide rail assembly 500 guides and laterally supports the lifting box 200, ensuring stable and smooth lifting of the lifting box 200.

[0060] FIG5 is an exploded view of a limit microswitch and a switch bracket provided in an embodiment of the present application. Referring to FIG2 , FIG3 , and FIG5 , in some embodiments provided in the present application, two limit microswitches 600 are fixedly connected to the outer wall of one side of the main box 100. The two limit microswitches 600 are arranged vertically, corresponding to the top and bottom positions of the travel of the lifting box 200, respectively. The limit microswitches 600 have a trigger head 610 facing the angle iron 510. The limit microswitches 600 are electrically connected to the lifting drive mechanism 400 and are used to control the lifting drive motor 410 to stop operation. Two paddle mounting plates 810 are fixedly connected to the angle iron 510 by screws. The two paddle mounting plates 810 correspond to the two limit microswitches 600, respectively. Position paddles 800 are integrally formed on the paddle mounting plates 810. The position paddles 800 are used to abut the corresponding trigger heads 610 to cause the corresponding limit microswitches 600 to de-energize.

[0061] Specifically, in the process of the lifting drive mechanism 400 driving the lifting box 200 to perform lifting movement relative to the main box 100, after the position paddle 800 abuts against the extrusion trigger head 610 and causes the limit micro switch 600 to cut off the power, the lifting drive mechanism 400 can be automatically stopped, thereby achieving the automatic stop and maintenance of the lifting box 200.

[0062] Please refer to Figure 5. In some embodiments provided in the present application, for example, the side of the position paddle 800 used to abut against the trigger head 610 is set to a smooth convex arc surface; the trigger head 610 is rotatably connected to the pulley 620, and the pulley 620 is used to roll and abut against the arc-shaped position paddle 800.

[0063] Specifically, the pulley 620 enables the position paddle 800 and the trigger head 610 to have a rolling contact mode. When the position paddle 800 squeezes the trigger head 610, the contact between the position paddle 800 and the trigger head 610 is smoother, and the contact stress between the position paddle 800 and the trigger head 610 is smaller, which can extend the service life of the position paddle 800 and the trigger head 610.

[0064] Please refer to Figures 3 and 5. In some embodiments provided in the present application, for example, the outer wall of the main box 100 is also fixedly connected by screws to a switch bracket 700 for fixing the limit micro switch 600. The switch bracket 700 has two corresponding limit surfaces 710, and the two limit surfaces 710 respectively press against the top and bottom surfaces of the limit micro switch 600; two positioning columns 720 are integrally formed on the inner side of the switch bracket 700, and the limit micro switch 600 has two corresponding positioning holes 630. The positioning columns 720 are inserted into the positioning holes 630 and are plugged into the limit micro switch 600.

[0065] Specifically, the two opposite limit surfaces 710 of the switch bracket 700 respectively tightly abut the top and bottom surfaces of the limit micro switch 600, and the switch bracket 700 semi-encloses the non-working surface of the limit micro switch 600. The switch bracket 700 realizes a completely fixed installation of the limit micro switch 600 by plugging and fitting the positioning column 720 on itself with the positioning hole 630 on the limit micro switch 600.

[0066] Referring to FIG3 , in some embodiments provided herein, for example, a limit micro switch wire protection cover 640 is fixedly connected to the outer wall of the main box 100 by screws. The limit micro switch wire protection cover 640 is located on the same side as the limit micro switch 600. The limit micro switch wire protection cover 640 is used to route the wires that supply power to the limit micro switch 600. Specifically, the limit micro switch wire protection cover 640 can protect the wires that supply power to the limit micro switch 600.

[0067] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0068] It should be noted that phrases such as "one embodiment," "an embodiment," "exemplary embodiments," and "some embodiments" in this specification may indicate embodiments that may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0069] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0070] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0071] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A lifting type built-in range hood, characterized in that: include: The smoke hood is installed on the top of the stove to collect and exhaust the smoke; A lifting box connected to the top of the smoke collecting hood and communicating with the interior of the smoke collecting hood; The main box is embedded in the cabinet, and the lifting box is sleeved on the main box and slidably matched with the main box; A lifting drive mechanism, arranged on the main box and connected to the lifting box, the lifting drive mechanism is used to drive the lifting box to perform lifting movement relative to the main box; A slide rail assembly is disposed between the main box and the lifting box, the slide rail assembly connects the main box and the lifting box at the same time, and is used to enable the lifting box to smoothly move up and down relative to the main box; A limit micro switch having a trigger head, the limit micro switch is arranged on the main box, is electrically connected to the lifting drive mechanism, and is used to control the lifting drive mechanism to stop operating; A position paddle is arranged on the lifting box and is used for abutting against the trigger head to make the limit micro switch perform a power-off action.

2. The lifting type built-in range hood according to claim 1, characterized in that: The main box is provided with a screw rod mounting piece, the screw rod mounting piece has a receiving groove, and an ear seat is provided in the receiving groove; The lifting drive mechanism comprises a lifting drive motor, a screw rod and a lifting drive member; the screw rod and the lifting drive member are both arranged in the accommodating groove, the bottom end of the screw rod is inserted into the ear seat and rotatably matched with the ear seat, the top end of the screw rod is fixedly connected to the output shaft of the lifting drive motor, and the lifting drive motor is connected to the main box; the lifting drive member is sleeved on the screw rod and is threadedly matched with the screw rod, and the lifting drive member is connected to the lifting box; The lifting drive motor is used to drive the lifting box to perform lifting movement relative to the main box through the screw rod and the lifting drive member.

3. The lifting type built-in range hood according to claim 1 or 2, characterized in that: It also includes a slide rail assembly disposed between the main box and the lifting box, the slide rail assembly including an angle iron and a slide rail; The angle iron is arranged on the inner wall of the lifting box; The slide rail comprises an inner rail and an outer rail which slide with each other. One is connected to the main box, and the other is connected to the lifting box.

4. The lifting type built-in range hood according to claim 1 or 2, characterized in that: The main box is also provided with a switch bracket for fixing the limit micro switch, and the switch bracket has two corresponding limit surfaces, and the two limit surfaces are used to respectively press against the top surface and the bottom surface of the limit micro switch.

5. The lifting type built-in range hood according to claim 4, characterized in that: The switch bracket is provided with a positioning column, and the limit micro switch is correspondingly provided with a positioning hole, and the positioning column is inserted into the positioning hole and plug-fitted with the limit micro switch.

6. The lifting type built-in range hood according to claim 1 or 2, characterized in that: The side surface of the position paddle for contacting with the trigger head is configured as a smooth convex arc surface.

7. The lifting type built-in range hood according to claim 1 or 2, characterized in that: The trigger head is rotatably connected to a pulley, and the pulley is used for rolling contact with the position paddle.

8. The lifting type built-in range hood according to claim 1 or 2, characterized in that: The outer wall of the main box is provided with a limit micro switch wire protection cover, and the limit micro switch wire protection cover is used for laying out the wires for supplying power to the limit micro switch.

9. The lifting type built-in range hood according to claim 1 or 2, characterized in that: It also includes a front guide rail column arranged between the main box and the lifting box, the front guide rail column is connected to the inner wall of the lifting box, and the front guide rail column is slidably matched with the main box.

10. The lifting type built-in range hood according to claim 1 or 2, characterized in that: It also includes an internal wire protection cover arranged between the main box and the lifting box, the internal wire protection cover is connected to the inner wall of the lifting box and slidably cooperates with the main box, and the internal wire protection cover is used for laying wires.

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