Range hood

Abstract

The utility model provides an improved range hood. The range hood comprises an air inlet (3) and a smoke guide plate (5) suitable for closing the air inlet (3), the smoke guide plate (5) is arranged to be suitable for being switched between a first position and a second position, when the smoke guide plate (5) is located at the first position, the air inlet (3) is open, and when the smoke guide plate (5) is located at the second position, the air inlet (3) is closed. When the smoke deflector (5) is located at the second position, the smoke deflector (5) completely or partially seals the gas inlet (3), and the range hood is provided with a gas detection hole (4) and a gas sensor (9); the gas sensor (9) is arranged in a hidden manner; the fuel gas detection hole (4) is arranged to be suitable for conveying environment airflow to the fuel gas sensor (9); when the smoke guide plate (5) is located at the first position, an eave part is formed by the smoke guide plate (5), an oil smoke source is located below the eave part, and the fuel gas detection hole (4) and the fuel gas sensor (9) are both located above the eave part; the lower surface of the eave part is arranged to be suitable for guiding oil fume airflow generated by the oil fume source to the air inlet (3); and when the smoke deflector (5) is located at the second position, the eave part disappears. Therefore, the gas leakage condition at the oil smoke source can be conveniently detected by the gas sensor, and the gas sensor is not easy to be polluted by the oil smoke airflow.

Description

[Technical field]

[0001] The present application relates to the field of range hoods. [Background technology]

[0002] In Asia, due to the traditional cooking habit of stir-frying, the oil content in the smoke produced during cooking is particularly high. Therefore, the range hood used to extract the oil smoke produced during cooking has become an important household appliance that is indispensable in daily life. As people's requirements for quality of life continue to improve, range hoods are also constantly upgraded and improved.

[0003] At present, a solution of installing a range hood with a gas sensor has been proposed to provide a timely warning when a gas leak occurs. However, the existing solution of installing a range hood with a gas sensor needs to be further enhanced and improved. For example, when the range hood is embedded in a cabinet, the gas detection hole corresponding to the gas sensor is easily blocked by the cabinet, so that the gas sensor cannot effectively perform its function. For another example, when the user uses a detergent to scrub the range hood, the detergent can easily pass through the gas detection hole corresponding to the gas sensor and dirty the gas sensor, affecting its service life. For another example, the arrangement position of the gas sensor is single, which is not conducive to efficient gas leakage detection.

[0004] Unless there is sufficient evidence to support it, the prior art described herein does not mean that the prior art is known to ordinary technicians in the field involved in this application before the filing date of this application. [Summary of the invention]

[0005] One purpose of the embodiments of the present application is to provide an improved range hood in view of at least one of the above technical problems and / or other possible technical problems not mentioned in the present application.

[0006] One embodiment of the present application relates to a range hood, comprising an air inlet and a smoke guide plate suitable for closing the air inlet, the smoke guide plate being configured to switch between a first position and a second position, the air inlet being open when the smoke guide plate is in the first position, and completely or partially closing the air inlet when the smoke guide plate is in the second position, the range hood being provided with a gas detection hole and a gas sensor; the gas sensor being hidden; the gas detection hole being configured to convey ambient airflow to the gas sensor; when the smoke guide plate is in the first position, the smoke guide plate forms an eaves, the oil fume source is located below the eaves, the gas detection hole and the gas sensor are both located above the eaves; the lower surface of the eaves is configured to guide the oil fume airflow generated by the oil fume source to the air inlet; when the smoke guide plate is in the second position, the eaves disappears.

[0007] When the smoke guide plate is in the first position, the smoke guide plate forms an eaves portion, the oil fume source is located below the eaves portion, and both the gas detection hole and the gas sensor are located above the eaves portion; the lower surface of the eaves portion is configured to be suitable for guiding the oil fume airflow generated by the oil fume source to the air inlet; it can be seen that when the smoke guide plate is in the first position, the range hood is suitable for exhausting the oil fume airflow generated by the oil fume source, and the oil fume airflow is limited below the eaves portion, and both the gas detection hole and the gas sensor are located above the eaves portion. Thus, both the gas detection hole and the gas sensor are isolated from the oil fume airflow, making it difficult for the gas sensor to be contaminated by the oil fume airflow. When the smoke guide plate is in the second position, the eaves portion disappears. Thus, there is no barrier between the gas detection hole and the oil fume source, facilitating the gas sensor to detect the gas leakage condition at the oil fume source, so as to give an early warning in time when gas leakage occurs. It can be seen that by adopting the technical solution of the present application, it is both convenient for the gas sensor to detect the gas leakage condition at the oil fume source and makes it difficult for the gas sensor to be contaminated by the oil fume airflow.

[0008] In one or some embodiments, the range hood includes a housing and a smoke collecting hood arranged in sequence from top to bottom; the air inlet and the smoke guide plate are both arranged on the smoke collecting hood; when the smoke guide plate is in the second position, the housing protrudes forward beyond the smoke collecting hood to form a suspended portion; the gas detection hole is arranged on the side wall of the suspended portion.

[0009] In one or some embodiments, the range hood is configured to be suitable for being hung and fixed on a wall; the orthographic projection of the range hood on the wall is in a "convex" shape. Thus, the gas detection hole arranged on the side wall of the suspended portion is close to the middle area of the range hood, facilitating taking into account the gas leakage detection in the left cooking area and the right cooking area of the oil fume source.

[0010] In one or some embodiments, the gas detection hole is arranged on the left side wall or the right side wall of the suspended portion.

[0011] In one or some embodiments, the housing is configured to be suitable for being embedded in a cabinet, and the smoke collecting hood is exposed below the cabinet; the bottom wall of the suspended portion is lower than the top edge of the smoke collecting hood; the gas detection hole is completely or partially located below the top edge of the smoke collecting hood. Thus, a foolproof design is achieved, such that the gas detection hole will not be completely blocked by the cabinet, ensuring that the gas sensor can detect the gas leakage condition at the oil fume source.

[0012] In one or some embodiments, the top edge of the smoke collecting hood is configured to be suitable for abutting against the bottom wall of the cabinet.

[0013] In one or some embodiments, a U-shaped notch is provided at the upper edge of the smoke guide plate; the suspended part is embedded in the U-shaped notch; the smoke guide plate is configured to rotate around its upper edge to switch between a first position and a second position; when the smoke guide plate is in the second position, the bottom wall of the suspended part is located in front of the U-shaped notch, and the smoke guide plate extends obliquely downward from front to back; when the smoke guide plate switches from the second position to the first position, the lower edge of the smoke guide plate is lifted forward, and the bottom wall of the suspended part partially passes through the U-shaped notch and moves to the rear of the U-shaped notch; when the smoke guide plate is in the first position, the bottom wall of the suspended part is divided into a front part and a rear part by the bottom edge of the U-shaped notch.

[0014] In one or some embodiments, the bottom wall of the suspended part is horizontally arranged; and / or

[0015] When the smoke guide plate is in the first position, the bottom edge of the U-shaped notch abuts against the bottom wall of the suspended part; and / or

[0016] When the smoke guide plate is in the second position, the bottom edge of the U-shaped notch abuts against the bottom wall of the suspended part; and / or

[0017] The left edge of the U-shaped notch abuts against the left side wall of the suspended part, and the right edge of the U-shaped notch abuts against the right side wall of the suspended part.

[0018] In one or some embodiments, the range hood includes a metal housing, and the gas detection hole is integrally formed on the metal housing; the gas detection hole extends obliquely upward from the outside of the metal housing to the inside of the metal housing. The gas detection hole is arranged in this way so that when the user scrubs the range hood with a cleaner, the cleaner is not likely to pass through the gas detection hole and dirty the gas sensor. Moreover, the gas detection hole is arranged in this way so that the oil fume airflow and the waste oil attached to the range hood are not likely to pass through the gas detection hole and dirty the gas sensor.

[0019] In one or some embodiments, the number of the gas detection holes is at least three and the whole is in a grid shape. Thus, while making it difficult for the cleaner to pass through the gas detection hole and dirty the gas sensor, the total area of the gas detection holes is large enough to ensure that the gas sensor can effectively detect the gas leakage situation at the oil fume source.

[0020] In one or some embodiments, a driving device is included for driving the smoke guide plate to switch between the first position and the second position; and / or

[0021] A control module is included and is configured to be adapted to issue a response instruction when the gas sensor detects gas leakage; and / or

[0022] The eaves part extends obliquely downward from the top edge of the air inlet backward and forward; and / or

[0023] When the smoke guide plate is in the second position, the smoke guide plate extends obliquely downward from front to back; and / or

[0024] The smoke guide plate is arranged to rotate around its upper edge to switch between the first position and the second position.

[0025] It should be noted here that the directional expressions such as "above", "below", "from top to bottom", "left side wall", "right side wall", "bottom wall" etc. appearing in this application are based on the normal use state of the range hood if there is no special description.

[0026] It should be pointed out here that the "first" and "second" appearing in this specification are only for descriptive purposes and do not indicate relative importance; moreover, they are not the definition of the quantity of the features they limit; in addition, they are not the definition of the logical relationship or sequential relationship of the features they limit.

[0027] The above technical solution content of this application is not used to describe all possible implementation manners of this application. Throughout the application, guidance is provided by listing examples in many places, and these examples can be used for various feasible combinations.

Description of the Drawings

[0028] The following drawings only schematically illustrate and explain this application and do not limit the scope of this application, where:

[0029] Figure 1 is a schematic structural view of a range hood embodiment of this application when the smoke guide plate is in the first position;

[0030] Figure 2 is a schematic structural view of a range hood embodiment of this application when the smoke guide plate is in the second position;

[0031] Figure 3 is Figure 2 a partial enlarged view of the structure at A in;

[0032] Figure 4 is Figure 2 a left view of the shown structure;

[0033] Figure 5 is along Figure 4 a cross-sectional view taken along line B-B in;

[0034] Figure 6 is Figure 5 a partial enlarged view of the structure at C in;

[0035] Figure 7 is Figure 2 The installation effect diagram of the embodiment of the range hood shown;

[0036] Figure 8 is Figure 7 The left view of the structure shown.

[0037] Reference numerals:

[0038] 1 - housing, 2 - smoke collecting hood, 3 - air inlet, 4 - gas detection hole, 5 - smoke guiding plate, 6 - bottom wall of the suspended part, 7 - oil cup, 8 - cabinet, 9 - gas sensor.

Specific implementation manner

[0039] To make the purpose, solution and beneficial effects of this application clearer, the following further explains this application in conjunction with the drawings and preferred embodiments.

[0040] An embodiment of a range hood proposed in this application includes a driving device, an air inlet 3 and a smoke guiding plate 5 adapted to close the air inlet 3. The smoke guiding plate 5 is arranged to be adapted to switch between a first position and a second position under the drive of the driving device. When the smoke guiding plate 5 is in the first position, the air inlet 3 is open, as Figure 1 shown. When the smoke guiding plate 5 is in the second position, the smoke guiding plate 5 completely closes the air inlet 3, as Figure 2 shown. The driving device is used to drive the smoke guiding plate 5 to switch between the first position and the second position.

[0041] This embodiment of the range hood includes a housing 1 and a smoke collecting hood 2 arranged in sequence from top to bottom, as Figure 1 and 2 shown. The smoke guiding plate 5 is arranged on the smoke collecting hood 2. The air inlet 3 is also arranged on the smoke collecting hood 2. A filter screen is arranged at the air inlet 3. A smoke channel is arranged in the smoke collecting hood 2, and the air inlet 3 is used to convey air flow to the smoke channel of the smoke collecting hood 2. An oil cup 7 is suspended at the bottom end of the smoke collecting hood 2 for holding the waste oil filtered by the filter screen and the waste oil attached in the smoke channel of the smoke collecting hood 2.

[0042] The top wall of the housing 1 is provided with an exhaust port. An exhaust pipe is connected between the exhaust port and the common flue. A fan is arranged in the housing 1. Preferably, a centrifugal fan is adopted. Specifically, an air flow channel is arranged in the housing, and the fan is arranged in the air flow channel. The air flow channel of the housing 1 is communicated with the smoke channel of the smoke collecting hood 2.

[0043] This embodiment of the range hood is provided with a gas detection hole 4 and a gas sensor 9. The gas sensor 9 is hidden. The gas detection hole 4 is arranged to be adapted to convey ambient air flow to the gas sensor 9. Thus, once gas leakage occurs in the kitchen, the gas sensor 9 can detect it in time.

[0044] The casing is provided with a receiving space for placing the gas sensor 9. The receiving space is isolated from the air flow channel inside the casing. Thus, the components of the gas sensor 9 are isolated from the oil fume air flow in the air flow channel inside the casing, which helps to extend the service life of the gas sensor 9. The gas detection hole 4 shields the receiving space and the gas sensor 9 therein from the outside. Thus, in the normal use state, both the receiving space and the gas sensor 9 therein are invisible to the user.

[0045] When the smoke guide plate 5 is in the first position, the smoke guide plate 5 forms an eaves portion, the oil fume source is located below the eaves portion, and both the gas detection hole 4 and the gas sensor 9 are located above the eaves portion, as Figure 1 shown.

[0046] When the smoke guide plate 5 is in the first position, as Figure 1 shown, the range hood is in the working state suitable for exhausting oil fume. At this time, if the fan operates, a negative pressure is generated to exhaust the oil fume generated by the oil fume source, forming an oil fume air flow. The oil fume air flow first flows into the air inlet 3, then the oil fume air flow flows through the oil fume channel of the smoke collecting hood 2, then flows into the air flow channel of the casing 1, and then flows out from the exhaust port, flows into the exhaust pipe, and then is discharged into the common flue.

[0047] The eaves portion extends obliquely downward from the top edge of the air inlet 3 backward and forward, as Figure 1 shown. The lower surface of the eaves portion is arranged to be suitable for guiding the oil fume air flow generated by the oil fume source to the air inlet 3. In this embodiment, the oil fume source is a double-burner gas stove located directly below the range hood, which is provided with a left burner and a right burner.

[0048] When the smoke guide plate 5 is in the second position, the eaves portion disappears. At this time, the range hood is in a non-working state. When the smoke guide plate 5 is in the second position, the smoke guide plate 5 extends obliquely downward from front to back, as Figure 2 shown. When the smoke guide plate 5 is in the second position, the left view of the smoke collecting hood 2 is in the shape of "イ", as Figure 4 shown. When the smoke guide plate 5 is in the second position, the smoke guide plate 5 is located in the upper region of the "イ" shape. The oil cup 7 is suspended at the bottom end of the lower region of the "イ" shape.

[0049] Since the eaves portion disappears when the smoke guide plate 5 is in the second position, as Figure 2 and 4As shown, there is no partition between the gas detection hole 4 and the oil fume source. If gas leaks from either the left burner or the right burner of the double-burner gas stove, the gas sensor 9 can conveniently detect it. It should be noted that when the oil fume source generates oil fume, that is, when the gas stove is used for cooking, there may be some normal gas leakage. At this time, it is also possible for the gas sensor 9 not to start. In other words, preferably, the gas sensor 9 starts when the smoke guide plate 5 is in the second position, and the gas sensor 9 is closed when the smoke guide plate 5 is in the first position.

[0050] When the smoke guide plate 5 is in the second position, the housing 1 protrudes forward beyond the smoke collecting hood 2 to form a suspended part, as Figure 2 and 4 shown. The body of the housing 1 located behind the suspended part is connected to the smoke collecting hood 2. The bottom wall 6 of the suspended part is horizontally arranged. The gas detection hole 4 is provided on the side wall of the suspended part. Specifically, the gas detection hole 4 is provided on the left side wall of the suspended part.

[0051] This embodiment of the range hood is configured to be suitable for hanging and fixing on a wall. The orthographic projection of the range hood on the wall is in a "convex" shape. It should be noted that regardless of whether the smoke guide plate 5 is in the first position or the second position, the orthographic projection of the range hood on the wall is in a "convex" shape. Because the length of the housing 1 is less than the length of the smoke collecting hood 2, and the housing 1 is placed in the middle, the housing 1 corresponds to the protruding part of the "convex" shape. The smoke collecting hood 2 corresponds to the lower half of the "convex" shape. The gas detection hole 4 is provided in this "protruding part"; thus, the gas detection hole 4 is also relatively centered, and if gas leaks from either the left burner or the right burner of the double-burner gas stove, the gas sensor 9 can conveniently detect it.

[0052] The housing 1 is configured to be suitable for being embedded in the cabinet 8, and the smoke collecting hood 2 is exposed below the cabinet 8, as Figure 7 and 8 shown. The bottom wall 6 of the suspended part is lower than the top edge of the smoke collecting hood 2. The gas detection hole 4 is partially located below the top edge of the smoke collecting hood 2; in other words, a part of the gas detection hole 4 is lower than the top edge of the smoke collecting hood 2. At the same time, the gas detection hole 4 is located in front of the top edge of the smoke collecting hood 2, as Figure 8 shown.

[0053] The top edge of the smoke collecting hood 2 is configured to be suitable for abutting against the bottom wall of the cabinet 8. The top edge of the smoke collecting hood 2 is shown by the reference numeral A in Figure 1 the drawing.

[0054] Since the bottom wall 6 of the suspended part is lower than the top edge of the smoke collecting hood 2, when the top edge of the smoke collecting hood 2 abuts against the bottom wall of the cabinet 8, the bottom wall 6 of the suspended part is exposed below the cabinet 8, that is, the bottom end of the suspended part is exposed below the cabinet 8, as Figure 7 and8 As shown. Thus, an anti-mistake effect is generated, which can ensure that the bottom end of the hanging part is exposed below the cabinet 8. Since the gas detection hole 4 is partially located below the top edge of the smoke collecting hood 2, the gas detection hole 4 is partially exposed below the cabinet 8, as Figure 8 shown. It can be seen that even when the top edge of the smoke collecting hood 2 abuts against the bottom wall of the cabinet 8 so that the range hood is as much as possible embedded in the cabinet 8, the gas detection hole 4 will still be partially exposed below the cabinet 8, so that the installation of the cabinet 8 will not affect the function realization of the gas sensor 9.

[0055] It should be noted that a cabinet door panel can also be further provided between Figure 7 the two cabinets 8 shown to block the casing 1 located between the two cabinets 8. Figure 7 The front surfaces of the two cabinets 8 shown are both rectangular, and the front surface of the further provided cabinet door panel is also rectangular. The front surface of the further provided cabinet door panel is connected between Figure 7 the front surfaces of the two cabinets 8 shown, and the three are integrally rectangular.

[0056] A U-shaped notch is provided at the upper edge of the smoke guiding plate 5, as Figure 1 and 2 shown. The hanging part is embedded in the U-shaped notch. The smoke guiding plate 5 is arranged to rotate around its upper edge and switch between a first position and a second position. When the smoke guiding plate 5 switches from the second position to the first position, the lower edge of the smoke guiding plate 5 is lifted forward, and the bottom wall 6 of the hanging part partially passes through the U-shaped notch and moves to the rear of the U-shaped notch.

[0057] When the smoke guiding plate 5 is in the second position, the bottom wall 6 of the hanging part is located in front of the U-shaped notch, and the smoke guiding plate 5 extends obliquely downward from front to back, as Figure 2 shown. It should be noted that when the smoke guiding plate 5 is in the second position, the bottom edge of the U-shaped notch abuts against the rear edge of the bottom wall 6 of the hanging part. At this time, the bottom wall 6 of the hanging part is located in front of the U-shaped notch.

[0058] When the smoke guiding plate 5 is in the first position, the bottom wall 6 of the hanging part is divided into a front part and a rear part by the bottom edge of the U-shaped notch, as Figure 1 shown. When the smoke guiding plate 5 is in the first position, the bottom edge of the U-shaped notch abuts against the middle area of the bottom wall 6 of the hanging part. The left edge of the U-shaped notch abuts against the left side wall of the hanging part, and the right edge of the U-shaped notch abuts against the right side wall of the hanging part.

[0059] This embodiment of the range hood includes a metal casing. The gas detection hole 4 is integrally formed on the metal casing. Specifically, the metal casing is arranged on the casing 1. The gas detection hole 4 extends obliquely upward from the outside of the metal casing to the inside of the metal casing, as Figure 6As shown. The number of gas detection holes 4 is six, and the six gas detection holes 4 are in a grid shape as a whole. Figures 1 to 6 shown.

[0060] The range hood embodiment includes a control module, which is electrically connected to the gas sensor 9. The control module is configured to be suitable for issuing a response instruction when the gas sensor 9 detects a gas leak. Exemplarily, the range hood is provided with a display module, which is electrically connected to the control module; when the gas sensor 9 detects a gas leak, the control module issues a corresponding response instruction to the display module, so that the display module displays a gas leak reminder message. Exemplarily, the range hood is provided with a voice module, which is electrically connected to the control module; when the gas sensor 9 detects a gas leak, the control module issues a corresponding response instruction to the voice module, so that the voice module plays a gas leak reminder message. Exemplarily, the range hood is provided with an information sending module, which is electrically connected to the control module; when the gas sensor 9 detects a gas leak, the control module issues a corresponding response instruction to the information sending module, so that the information sending module sends a gas leak reminder message to a cloud server and / or a bound smart phone, etc. Exemplarily, when the gas sensor 9 detects a gas leak, the control module is configured to be suitable for issuing a corresponding response instruction to a corresponding gas stove, and controlling the corresponding gas stove to cut off the gas. Exemplarily, when the gas sensor 9 detects a gas leak, the control module is configured to issue corresponding response instructions to the drive device and the fan, control the drive device to switch the smoke guide plate from the second position to the first position, and control the fan to operate, so as to use the range hood to exhaust the leaked gas.

[0061] Exemplarily, the gas detection hole may be provided on the right side wall of the suspended portion.

[0062] For example, the gas detection hole may be completely located below the top edge of the smoke hood. In other words, the gas detection hole is lower than the top edge of the smoke hood. Therefore, even if the top edge of the smoke hood is close to the bottom wall of the cabinet and the range hood is embedded in the cabinet as much as possible, the gas detection hole will still be completely exposed below the cabinet.

[0063] The components of different embodiments may be combined with each other in any feasible manner to achieve the purpose of this application.

[0064] The above are only optional embodiments of some implementation scenarios of the present application. It should be noted that, for ordinary technicians in this technical field, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the technical concept of the present application also fall within the protection scope of the present application.

Claims

1. A range hood, comprising an air inlet (3) and a smoke guide plate (5) suitable for closing the air inlet (3), wherein the smoke guide plate (5) is configured to be switchable between a first position and a second position, wherein when the smoke guide plate (5) is in the first position, the air inlet (3) is open, and when the smoke guide plate (5) is in the second position, the smoke guide plate (5) completely or partially closes the air inlet (3), wherein: The range hood is provided with a gas detection hole (4) and a gas sensor (9); The gas sensor (9) is hidden; The gas detection hole (4) is configured to be suitable for conveying ambient air flow to the gas sensor (9); When the smoke guide plate (5) is located at the first position, the smoke guide plate (5) forms an eaves portion, the oil smoke source is located below the eaves portion, and the gas detection hole (4) and the gas sensor (9) are both located above the eaves portion; The lower surface of the eaves is configured to guide the oil fume airflow generated by the oil fume source to the air inlet (3); When the smoke guide plate (5) is located at the second position, the eaves disappear.

2. The range hood according to claim 1, characterized in that: The range hood comprises a casing (1) and a fume collecting hood (2) which are arranged in sequence from top to bottom; The air inlet (3) and the smoke guide plate (5) are both arranged on the smoke collecting hood (2); When the smoke guide plate (5) is located at the second position, the housing (1) protrudes forwards out of the smoke collecting cover (2) to form a suspended portion; The gas detection hole (4) is arranged on the side wall of the suspended portion.

3. The range hood according to claim 2, characterized in that: The range hood is configured to be suitable for being hung and fixed on a wall; The orthographic projection of the range hood on the wall is convex.

4. The range hood according to claim 3, characterized in that: The gas detection hole (4) is arranged on the left wall or the right wall of the suspended portion.

5. The range hood according to claim 4, characterized in that: The casing (1) is configured to be suitable for being embedded in a cabinet (8), and the smoke collecting hood (2) is exposed below the cabinet (8); The bottom wall (6) of the suspended portion is lower than the top edge of the smoke collecting hood (2); The gas detection hole (4) is completely or partially located below the top edge of the smoke collecting hood (2).

6. The range hood according to claim 5, characterized in that: The top edge of the smoke collecting hood (2) is configured to be suitable for abutting against the bottom wall of the cabinet (8).

7. The range hood according to any one of claims 2 to 6, characterized in that: A U-shaped notch is provided at the upper edge of the smoke guide plate (5); The suspended portion is embedded in the U-shaped notch; The smoke guide plate (5) is arranged to rotate around its upper edge and switch between a first position and a second position; When the smoke guide plate (5) is located at the second position, the bottom wall (6) of the suspended portion is located in front of the U-shaped notch, and the smoke guide plate (5) extends downwardly and obliquely from front to rear; When the smoke guide plate (5) switches from the second position to the first position, the lower edge of the smoke guide plate (5) is lifted forward, and the bottom wall (6) of the suspended portion partially passes through the U-shaped notch and moves to the rear of the U-shaped notch; When the smoke guide plate (5) is in the first position, the bottom wall (6) of the suspended portion is divided into a front portion and a rear portion by the bottom edge of the U-shaped notch.

8. The range hood according to claim 7, characterized in that: The bottom wall (6) of the suspended portion is arranged horizontally; and / or When the smoke guide plate (5) is in the first position, the bottom edge of the U-shaped notch abuts against the bottom wall (6) of the suspended portion; and / or When the smoke guide plate (5) is in the second position, the bottom edge of the U-shaped notch abuts against the bottom wall (6) of the suspended portion; and / or The left edge of the U-shaped notch is in contact with the left side wall of the suspended portion, and the right edge of the U-shaped notch is in contact with the right side wall of the suspended portion.

9. The range hood according to any one of claims 1 to 6, characterized in that: The range hood comprises a metal shell, and the gas detection hole (4) is integrally formed on the metal shell; The gas detection hole (4) extends obliquely upward from the outer side of the metal shell toward the inner side of the metal shell.

10. The range hood according to claim 9, characterized in that: The number of the gas detection holes (4) is at least three, and the whole is in a grid shape.

11. The range hood according to any one of claims 1 to 6, characterized in that: comprising a driving device for driving the smoke guide plate (5) to switch between a first position and a second position; and / or comprising a control module, configured to issue a response instruction when the gas sensor (9) detects a gas leak; and / or The eaves portion extends obliquely downward from the top edge of the air inlet (3) from the rear to the front; and / or When the smoke guide plate (5) is located at the second position, the smoke guide plate (5) extends obliquely downward from front to rear; and / or The smoke guide plate (5) is arranged to rotate around its upper edge and switch between a first position and a second position.

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