A concealed extractor hood

Abstract

The utility model discloses a hidden type range hood, including the casing and the smoke collecting cavity, the smoke collecting cavity sets up on the lifting mechanism, can with the lifting mechanism movement and by the casing accomodate or release, the smoke collecting cavity includes the fairing and the anti -jam device, and the fairing can open and shut to set up on the smoke collecting cavity, the anti -jam device includes: the convex part of the fairing one side surface near the smoke collecting cavity, the recess of the smoke collecting cavity one side surface near the fairing and with control module establishes the detection module of communication connection, wherein, the recess is in the position of smoke collecting cavity corresponds the convex part, to accomodate the convex part under the fairing is in the closed state, make the fairing surface and the surface of smoke collecting cavity tend to fit, the detection module includes the signal transmitting module and the signal receiving module of the recess both sides, and the signal transmitting module emits the signal to the signal receiving module, and the corresponding signal is cut off after the convex part is accomodated to the recess and is shielded, can detect whether the fairing is closed.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to a concealed range hood. Background Technology

[0002] In modern kitchens, range hoods are essential appliances, and their performance and safety are of great concern. Among them, lift-up range hoods, with their adjustable height, can flexibly adjust the distance between the air inlet and the source of cooking fumes according to cooking needs. This not only enhances the fume extraction effect but also saves space by rising and hiding when not in use, improving the overall aesthetics of the kitchen, thus gaining popularity among many consumers.

[0003] However, the problem is that range hoods with lifting functions pose serious safety hazards in actual use. Because the smoke collection chamber can be raised and lowered, and it has a guide vane, the chamber needs to extend and the vane needs to be open to function. When the range hood is turned off, the vane needs to close before the chamber retracts. If the vane is not properly closed during the extension or retraction process, it could be crushed, causing a safety hazard. Utility Model Content

[0004] This invention provides a concealed smoke hood that avoids the problem of the air guide plate being crushed during the extension or retraction of the smoke collection chamber.

[0005] According to one aspect of the present invention, a concealed smoke hood is provided, including a housing and a smoke collection chamber. The smoke collection chamber is disposed on a lifting mechanism and can be retracted or released from the housing as the lifting mechanism moves. The smoke collection chamber includes a guide plate and an anti-jamming device. The guide plate is closable on the smoke collection chamber.

[0006] The anti-jamming device includes: a protrusion on the side surface of the air guide plate near the smoke collection chamber, a groove on the side surface of the smoke collection chamber near the air guide plate, and a detection module that establishes a communication connection with the control module.

[0007] The groove is positioned in the smoke collection chamber corresponding to the protrusion, so as to accommodate the protrusion when the air guide plate is closed, so that the surface of the air guide plate tends to fit with the surface of the smoke collection chamber.

[0008] The detection module includes a signal transmitting module and a signal receiving module located on both sides of the groove. The signal transmitting module transmits a signal to the signal receiving module, and the corresponding signal is blocked and cut off after the protrusion is received into the groove.

[0009] Optionally, the signal transmitting module is an infrared transmitting module, and the signal receiving module is an infrared receiving module.

[0010] Optionally, the lifting mechanism includes a gear, a rack, and a lifting motor. The lifting motor is fixed to the housing and is driven by the gear. The rack is installed on the smoke collection chamber along the lifting direction of the smoke collection chamber, and the gear and rack mesh with each other. Alternatively, the lifting mechanism includes a slider, a slide rail, a lead screw, a nut, and a lifting motor. The lifting motor is fixed to the housing and is driven by the lead screw. The lead screw is disposed within the slide rail and is threadedly connected to the nut. The nut is fixedly connected to the slider, and the slider is fixedly connected to the smoke collection chamber. The slide rail is installed on the housing along the lifting direction of the smoke collection chamber, and the slider and the slide rail are slidably connected.

[0011] Optionally, the signal transmitting module and the signal receiving module are embedded in the inner wall of the groove.

[0012] Optionally, the signal transmitting module and the signal receiving module are located on the surface of the smoke collection chamber near the air guide plate.

[0013] Optionally, the protrusion and the groove are magnetic adsorption components that attract each other.

[0014] Optionally, it also includes: an alarm module; used to issue an alarm message while the signal is not cut off and the smoke collection chamber is still rising and falling.

[0015] Optionally, the distance between the signal transmitting module and the signal receiving module is greater than the outer diameter of the protrusion in its radial direction.

[0016] Optionally, it further includes: an electric hinge, wherein the air guide plate is hinged to the smoke collection chamber via the electric hinge.

[0017] The concealed smoke hood provided by this utility model includes a housing and a smoke collection chamber. The smoke collection chamber is disposed on a lifting mechanism and can be retracted or released from the housing as the lifting mechanism moves. The smoke collection chamber includes a guide plate and an anti-jamming device. The guide plate is closable on the smoke collection chamber. The anti-jamming device includes: a protrusion on the side surface of the guide plate near the smoke collection chamber, a groove on the side surface of the smoke collection chamber near the guide plate, and a detection module that establishes a communication connection with a control module. The groove corresponds to the protrusion in the smoke collection chamber, so as to accommodate the protrusion when the guide plate is closed, making the surface of the guide plate and the surface of the smoke collection chamber tend to fit together. The detection module includes a signal transmitting module and a signal receiving module located on both sides of the groove. The signal transmitting module transmits a signal to the signal receiving module, and the corresponding signal is blocked and cut off after the protrusion is accommodated in the groove. Thus, by continuously detecting whether the signal receiving module receives a signal, the detection module can determine whether the guide plate is closed. If the guide plate is not closed, the smoke collection chamber can be controlled to stop lifting. This avoids the problem of the air guide plate being crushed due to the air guide plate not closing during the process of the smoke collection chamber being collected or released.

[0018] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the concealed range hood provided in this embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of a concealed range hood provided in one embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the functional modules of a concealed range hood provided in one embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the lifting mechanism of the concealed range hood provided in this embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the lifting mechanism of a concealed range hood provided in one embodiment of the present invention;

[0025] Figure 6 yes Figure 2 An enlarged view of part A;

[0026] Figure 7 This is a structural schematic diagram of a concealed range hood provided in another embodiment of the present invention;

[0027] Figure 8 This is a structural schematic diagram of a concealed range hood provided in another embodiment of this utility model;

[0028] Figure 9 yes Figure 8 Enlarged view of section B.

[0029] Reference numerals: 101, Smoke collection chamber; 102, Air guide plate; 103, Protrusion; 104, Groove; 105, Signal transmitting module; 106, Signal receiving module; 107, Housing; 108, Control module; 200, Detection module; 300, Lifting motor; 301, Gear; 302, Rack; 303, Lead screw; 304, Nut; 305, Slide rail; 306, Slider; 400, Alarm module; 500, Electric hinge. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0031] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in sequences other than those illustrated or described herein.

[0032] Figure 1 This is a structural schematic diagram of the concealed range hood provided in an embodiment of this utility model. Figure 2 This is a schematic diagram of a concealed range hood structure provided in one embodiment of the present invention. Figure 3 This is a schematic diagram of the functional modules of a concealed range hood provided in one embodiment of this utility model. (See diagram below.) Figures 1 to 3As shown, the concealed smoke hood provided in this embodiment of the present invention includes a housing 107 and a smoke collection chamber 101. The smoke collection chamber 101 is disposed on the lifting mechanism and can be stored or released from the housing 107 as the lifting mechanism moves. The smoke collection chamber 101 includes a guide plate 102 and an anti-jamming device. The guide plate 102 is detachably disposed on the smoke collection chamber 101.

[0033] The anti-jamming device includes: a protrusion 103 on the side surface of the air guide plate 102 near the smoke collection chamber 101, a groove 104 on the side surface of the smoke collection chamber 101 near the air guide plate 102, and a detection module 200 that establishes a communication connection with the control module.

[0034] The groove 104 is positioned in the smoke collection chamber 101 corresponding to the protrusion 103, so as to accommodate the protrusion 103 when the air guide plate 102 is in the closed state, so that the surface of the air guide plate 102 tends to fit with the surface of the smoke collection chamber 101.

[0035] The detection module 200 includes a signal transmitting module 105 and a signal receiving module 106 located on both sides of the groove 104. The signal transmitting module 105 transmits a signal to the signal receiving module 106. The corresponding signal is blocked and cut off after being housed in the groove 104 by the protrusion 103.

[0036] It should be noted that the concealed range hood also includes a housing 107 and a control module 108, wherein a centrifugal fan is housed in the housing 107. The smoke collection chamber 101 is vertically and flexibly mounted within the housing 107 via a lifting mechanism. When the smoke extraction function is required, the smoke collection chamber 101 extends from the housing 107, and the air guide plate 102 opens. When the smoke extraction function is turned off, the air guide plate 102 closes, and the smoke collection chamber 101 retracts into the housing 107. Thus, the smoke collection chamber 101 can extend and retract within the housing 107 as needed, saving space and resulting in a more aesthetically pleasing appearance.

[0037] Because the air guide plate 102 needs to be properly closed when the smoke collection chamber 101 extends or retracts from the housing 107, otherwise the open air guide plate 102 will be crushed due to the rising or falling of the smoke collection chamber 101. In this embodiment, a detection module 200 is set to detect the state of the air guide plate 102 in real time to avoid the above situation from occurring. For example, Figure 2As shown, the detection module 200 includes a signal transmitting module 105 and a signal receiving module 106. The signal transmitting module 105 continuously sends signals to the signal receiving module 106. When the protrusion 103 is embedded in the groove 104, the protrusion 103 blocks the signal transmitted by the signal transmitting module 105, and thus the signal receiving module 106 cannot receive the signal. This indicates that the air guide plate 102 is closed on the smoke collection chamber 101. When the protrusion 103 is not embedded in the groove 104, the signal transmitted by the signal transmitting module 105 is received by the signal receiving module 106. This indicates that the air guide plate 102 is not closed on the smoke collection chamber 101.

[0038] The detection module 200 is electrically connected to the control module 108. If the signal receiving module 106 continuously receives a signal during the process of the control module 108 controlling the smoke collection chamber 101 to rise or fall, it indicates that the air guide plate 102 is not closed. In this case, the control module 108 can control the smoke collection chamber 101 to stop moving. Conversely, if the signal receiving module 106 does not receive a signal, it indicates that the air guide plate 102 is closed. In this case, the rise and fall of the smoke collection chamber 101 can be controlled normally.

[0039] Therefore, this embodiment can detect the state of the air guide plate 102 in real time by setting the detection module 200, thereby avoiding the risk of safety hazards caused by the air guide plate 102 still controlling the movement of the smoke collection chamber 101 when it is not closed.

[0040] Optionally, the signal transmitting module 105 is an infrared transmitting module, and the signal receiving module 106 is an infrared receiving module.

[0041] In this design, both the signal transmitting module 105 and the signal receiving module 106 are infrared detection modules. The signal transmitting module 105 emits infrared light, and the signal receiving module 106 senses the infrared light. When the two are blocked, the infrared light emitted by the signal transmitting module 105 cannot be received by the signal receiving module 106, meaning the obstruction cuts off the signal transmission. Therefore, by using a photosensor as the detection module 200, the detection accuracy is higher, and the cost is lower.

[0042] Optionally, Figure 4 This is a schematic diagram of the lifting mechanism of the concealed range hood provided in this embodiment of the utility model; as shown. Figure 4 As shown, the lifting mechanism includes a gear 301, a rack 302 and a lifting motor 300. The lifting motor 300 is fixed on the housing 107 and is connected to the gear 301 for transmission. The rack 302 is installed on the smoke collection chamber 101 along the lifting direction of the smoke collection chamber 101, and the gear 301 and the rack 302 mesh with each other.

[0043] In one embodiment, the lifting motor 300 can be fixed to the inner wall of the housing 107, and the rack 302 is fixed to the outer wall of the smoke collection chamber 101 along the lifting direction of the smoke collection chamber 101. The gear 301 is connected to the lifting motor 300 in a transmission manner, and the gear 301 meshes with the rack 302. The lifting motor 300 is electrically connected to the control module 108. Thus, when the control module 108 controls the lifting motor 300 to start, the lifting motor 300 will drive the gear 301 to rotate, thereby driving the rack 302 to move, and ultimately causing the smoke collection chamber 101 to rise and fall within the housing 107.

[0044] Optionally, Figure 5 This is a schematic diagram of the lifting mechanism of a concealed range hood provided in one embodiment of the present invention; as shown. Figure 5 As shown, the lifting mechanism includes a slider 306, a slide rail 305, a lead screw 303, a nut 304, and a lifting motor 300. The lifting motor 300 is fixed on the housing 107 and is connected to the lead screw 303. The lead screw 303 is located inside the slide rail 305 and is threadedly connected to the nut 304. The nut 304 is fixedly connected to the slider 306 and the slider 306 is fixedly connected to the smoke collection chamber 101. The slide rail 305 is installed on the housing 107 along the lifting direction of the smoke collection chamber 101, and the slider 306 and the slide rail 305 are slidably connected.

[0045] In another embodiment, the lifting motor 300 can drive the slider 306 to slide on the slide rail 305 via a lead screw and nut transmission mechanism. The slide rail 305 is disposed on the inner wall of the housing 107 along the lifting direction of the smoke collection chamber 101. The slider 306 is connected to the outer wall of the smoke collection chamber 101. The lifting motor 300 is electrically connected to the control module 108. After the control module 108 starts the lifting motor 300, the lifting motor 300 drives the lead screw 303 to rotate, which in turn drives the nut 304 to move along the lifting direction of the smoke collection chamber 101, thereby causing the slider 306 to move on the slide rail 305, ultimately causing the smoke collection chamber 101 to rise and fall within the housing 107.

[0046] In the above embodiments, the lifting motor 300 can be a stepper motor.

[0047] Optionally, Figure 2 This is a schematic diagram of the structure of a concealed range hood provided in one embodiment of the present invention. Figure 6 yes Figure 2 An enlarged view of part A. (See image below.) Figure 2 and Figure 6 As shown, the signal transmitting module 105 and the signal receiving module 106 are embedded in the inner wall of the groove 104.

[0048] The signal transmitting module 105 and the signal receiving module 106 are embedded in the inner wall of the groove 104, which can save installation space, and has high light utilization and makes the signal easier to identify.

[0049] It is understood that the groove 104 has a pair of upper and lower groove walls and a pair of left and right groove walls. The signal transmitting module 105 and the signal receiving module 106 can be embedded in the upper and lower groove walls or in the left and right groove walls. In this way, when the protrusion 103 is embedded in the groove 104, the extension and retraction of the protrusion 103 will not be affected, and the protrusion 103 will not cause wear to the signal transmitting module 105 and the signal receiving module 106. When the protrusion 103 is embedded in the groove 104, the air guide plate 102 is parallel and in contact with the surface of the smoke collection chamber 101.

[0050] Optionally, Figure 7 This is a structural schematic diagram of a concealed range hood provided in another embodiment of the present invention; Figure 8 This is a structural schematic diagram of a concealed range hood provided in another embodiment of this utility model;

[0051] Figure 9 yes Figure 8 Enlarged view of part B; as shown Figure 7 Paper Figure 9 As shown, the signal transmitting module 105 and the signal receiving module 106 are located on the surface of the smoke collection chamber 101 near the air guide plate 102.

[0052] The signal transmitting module 105 and the signal receiving module 106 are located on the surface of the smoke collection chamber 101 near the air guide plate 102, that is, on the outer wall of the smoke collection chamber 101. This avoids the squeezing or wear caused to the signal transmitting module 105 and the signal receiving module 106 by the protrusion and retraction of the protrusion 103. Furthermore, being located on the outer wall of the smoke collection chamber 101 saves space within the groove 104 and facilitates installation. It is understood that when the signal transmitting module 105 and the signal receiving module 106 are located on the outer wall of the smoke collection chamber 101, they can be located on opposite sides of the groove 104 (e.g., on opposite sides of the groove 104). Figure 8 As shown), or the left and right sides (as shown). Figure 7 As shown, the signal transmission paths of both need to pass through the groove 104. Thus, when the protrusion 103 is embedded in the groove 104, there is a certain gap between the surface of the air guide plate 102 and the surface of the smoke collection chamber 101 (that is, the installation gap reserved for the signal transmitting module 105 and the signal receiving module 106), but it can be set close to the surface of the smoke collection chamber 101.

[0053] In the two embodiments described above, the distance between the signal transmitting module 105 and the signal receiving module 106 is greater than the outer diameter of the protrusion 103 in the radial direction. That is, the shape of the protrusion 103 may be cylindrical, square, or other shapes, and the distance between the signal transmitting module 105 and the signal receiving module 106 needs to be greater than the outer diameter of the protrusion 103 in the radial direction. This can prevent the signal transmitting module 105 and the signal receiving module 106 from blocking the protrusion 103 when it enters or extends within the groove 104, thus avoiding other problems.

[0054] Optionally, the protrusion 103 and the groove 104 are magnetic adsorption components that attract each other.

[0055] When the protrusion 103 approaches the groove 104, it exerts a certain attractive force, making it easier to close the air guide plate 102 onto the surface of the smoke collection chamber 101. In one embodiment, a permanent magnet (such as a neodymium iron boron magnet) or an electromagnet can be installed inside the protrusion 103, and its surface can be covered with a scratch-resistant coating to protect the magnet and increase its wear resistance. A corresponding magnetic adsorption layer is installed inside the groove 104, which may be a metallic magnetic material (such as an iron or nickel alloy) or a magnet with complementary magnetic poles, achieving precise alignment and adsorption through magnetic force. It should be noted that the magnetic poles of the protrusion 103 and the groove 104 must be opposite (e.g., N pole to S pole) to ensure maximum attraction and avoid failure to connect due to repulsion of like poles.

[0056] Optionally, Figure 3 This is a schematic diagram of the functional modules of a concealed range hood provided in one embodiment of the present invention; as shown below. Figure 3 As shown, the concealed smoke hood also includes an alarm module 400, used to issue an alarm message when the signal is not cut off and the smoke collection chamber 101 is still rising and falling.

[0057] The control module 108 is connected to the detection module 200 and the alarm module 400 respectively. During the operation of the smoke collection chamber 101, when the signal receiving module 106 can receive the signal, the control module 108 controls the alarm module 400 to sound an alarm and controls the smoke collection chamber 101 to stop operating.

[0058] In addition, to warn users, a warning can be issued and the smoke collection chamber 101 can be stopped simultaneously if the air guide plate 102 is not closed during the operation of the smoke collection chamber 101, such as during its ascent or descent. This serves to alert users to the safety risks posed by the smoke hood and allow them to take appropriate precautions.

[0059] It should be noted that the alarm module 400 can be one or a combination of several of the following: a horn, a buzzer, or a flashing light. When the alarm module 400 uses a combination of several, it is more likely to attract the user's attention and serve as a warning. In other embodiments, it can also be a voice prompt or a warning image displayed on a screen.

[0060] Optionally, Figure 3 This is a schematic diagram of the functional modules of a concealed range hood provided in one embodiment of the present invention; as shown below. Figure 3 As shown, the concealed smoke hood also includes an electric hinge 500, and the air guide plate 102 is hinged to the smoke collection chamber 101 via the electric hinge 500.

[0061] The electric hinge 500 can be an electric rotating shaft (such as a brushless motor electric rotating shaft), meaning the opening and closing of the air guide plate 102 can also be automatically controlled by the control module 108. In this way, the control module 108 can control the electric hinge 500 to close the air guide plate 102 before controlling the movement of the smoke collection chamber 101. After the control detection module 200 detects that the air guide plate 102 is closed, it then controls the smoke collection chamber 101 to rise or fall. This improves the safety and automation of the smoke hood.

[0062] In the above embodiments, the control module 108 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the control module 108 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any suitable processor, controller, microcontroller, etc.

[0063] In summary, the concealed smoke hood provided by this utility model includes a housing and a smoke collection chamber. The smoke collection chamber is disposed on a lifting mechanism and can be retracted or released from the housing as the lifting mechanism moves. The smoke collection chamber includes a guide plate and an anti-jamming device. The guide plate is closable on the smoke collection chamber. The anti-jamming device includes: a protrusion on the surface of the guide plate near the smoke collection chamber, a groove on the surface of the smoke collection chamber near the guide plate, and a detection module that establishes a communication connection with the control module. The groove corresponds to the protrusion in the smoke collection chamber, so that the protrusion is retracted when the guide plate is closed, making the surface of the guide plate and the surface of the smoke collection chamber tend to fit together. The detection module includes a signal transmitting module and a signal receiving module located on both sides of the groove. The signal transmitting module transmits a signal to the signal receiving module, and the corresponding signal is blocked and cut off after the protrusion is retracted into the groove. Therefore, by continuously detecting whether the signal receiving module receives a signal, the detection module can determine whether the guide plate is closed. If the guide plate is not closed, the smoke collection chamber can be controlled to stop lifting. This avoids the problem of the air guide plate being crushed due to the air guide plate not closing during the process of the smoke collection chamber being collected or released.

[0064] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A concealed smoke hood, comprising a housing and a smoke collection chamber, characterized in that, The smoke collection chamber is mounted on the lifting mechanism and can be retracted or released from the housing as the lifting mechanism moves. The smoke collection chamber includes a guide plate and an anti-jamming device. The guide plate is detachably mounted on the smoke collection chamber. The anti-jamming device includes: a protrusion on the side surface of the air guide plate near the smoke collection chamber, a groove on the side surface of the smoke collection chamber near the air guide plate, and a detection module that establishes a communication connection with the control module. The groove is positioned in the smoke collection chamber corresponding to the protrusion, so as to accommodate the protrusion when the air guide plate is closed, so that the surface of the air guide plate tends to fit with the surface of the smoke collection chamber. The detection module includes a signal transmitting module and a signal receiving module located on both sides of the groove. The signal transmitting module transmits a signal to the signal receiving module, and the corresponding signal is blocked and cut off after the protrusion is received into the groove.

2. The concealed range hood according to claim 1, characterized in that, The signal transmitting module is an infrared transmitting module, and the signal receiving module is an infrared receiving module.

3. The concealed range hood according to claim 1, characterized in that, The lifting mechanism includes a gear, a rack, and a lifting motor. The lifting motor is fixed on the housing and is connected to the gear. The rack is installed on the smoke collection chamber along the lifting direction of the smoke collection chamber, and the gear and rack mesh with each other.

4. The concealed range hood according to claim 1, characterized in that, The lifting mechanism includes a slider, a slide rail, a lead screw, a nut, and a lifting motor. The lifting motor is fixed to the housing and is connected to the lead screw via a transmission. The lead screw is disposed inside the slide rail and is threadedly connected to the nut. The nut is fixedly connected to the slider and the slider is fixedly connected to the smoke collection chamber. The slide rail is installed on the housing along the lifting direction of the smoke collection chamber, and the slider and the slide rail are slidably connected.

5. The concealed range hood according to claim 1, characterized in that, The signal transmitting module and the signal receiving module are embedded in the inner wall of the groove.

6. The concealed range hood according to claim 1, characterized in that, The signal transmitting module and the signal receiving module are located on the surface of the smoke collection chamber near the air guide plate.

7. The concealed range hood according to claim 1, characterized in that, The protrusion and the groove are magnetic adsorption components that can attract each other.

8. The concealed range hood according to claim 1, characterized in that, Also includes: An alarm module is used to issue an alarm message when the signal is not cut off and the smoke collection chamber is still rising and falling.

9. The concealed range hood according to claim 5 or 6, characterized in that, The distance between the signal transmitting module and the signal receiving module is greater than the outer diameter of the protrusion in its radial direction.

10. The concealed range hood according to claim 1, characterized in that, Also includes: An electric hinge is used, and the air guide plate is hinged to the smoke collection chamber via the electric hinge.

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