Range hood

Abstract

The application discloses an oil fume extractor, and relates to the technical field of household appliances, which comprises a smoke collecting hood, an upper smoke inlet, a lower smoke inlet, an upper smoke inlet panel and an opening and closing mechanism. The smoke collecting hood is provided with a smoke collecting cavity, the upper smoke inlet and the lower smoke inlet which are in communication with the smoke collecting cavity. The lower smoke inlet is located below the upper smoke inlet and comprises a left side smoke inlet and a right side smoke inlet. The upper smoke inlet panel is used for opening and closing the upper smoke inlet, and the upper smoke inlet panel moves towards the smoke collecting cavity to open the upper smoke inlet. The opening and closing mechanism is arranged on the left side smoke inlet and the right side smoke inlet, so that the left side smoke inlet and the right side smoke inlet can be opened and closed. The technical scheme of the application can meet different oil fume extraction requirements of different cooking scenes.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to a range hood. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. Installed above the stove, they quickly remove cooking fumes and harmful oil fumes from the stove, venting them outdoors and reducing pollution. Different cooking scenarios have different fume extraction needs, and current range hood technology struggles to meet these diverse requirements. For example, when steaming, the steamer's height results in higher smoke output, sometimes even above the inlet of a near-suction range hood, easily causing high-level smoke overflow. Similarly, on a dual-burner stove, with the left burner used for simmering and the right burner for stir-frying, the stir-frying side produces significantly more smoke than the simmering side, leading to smoke overflow from the stir-frying side. Summary of the Invention

[0003] The main objective of this invention is to provide a range hood that can easily meet the different smoke extraction needs of different cooking scenarios.

[0004] To achieve the above objectives, the range hood proposed in this invention includes:

[0005] A smoke hood has a smoke collection chamber, an upper smoke inlet communicating with the smoke collection chamber, and a lower smoke inlet communicating with the smoke collection chamber. The lower smoke inlet is located below the upper smoke inlet and includes a left smoke inlet and a right smoke inlet.

[0006] The upper smoke inlet panel is movably opened and closed, and the upper smoke inlet panel moves toward the smoke collection chamber to open the upper smoke inlet; and

[0007] The opening and closing mechanism is provided for both the left smoke inlet and the right smoke inlet, so that both the left smoke inlet and the right smoke inlet can be opened and closed movably.

[0008] Optionally, when the upper smoke inlet panel opens the upper smoke inlet, there is a gap between the upper edge and the lower edge of the upper smoke inlet panel and the upper smoke inlet.

[0009] Optionally, the range hood further includes a rotating arm, the upper smoke inlet panel is fixedly connected to the upper end of the rotating arm, the lower end of the rotating arm is rotatably connected to the smoke collection hood, and the rotating connection point of the rotating arm is located below the upper smoke inlet.

[0010] Optionally, when the upper smoke inlet panel opens the upper smoke inlet, the upper smoke inlet panel tilts from bottom to top in a direction away from the upper smoke inlet.

[0011] Optionally, the range hood further includes a first driving device disposed within the smoke collection hood. The first driving device includes a power component and a transmission mechanism. The power component drives the upper smoke inlet panel to open and close through the transmission mechanism.

[0012] Optionally, the transmission mechanism is configured as a linkage mechanism.

[0013] Optionally, the lower smoke inlet is provided with a smoke inlet groove recessed into the smoke collection chamber, and the smoke inlet groove is provided with a smoke passage communicating with the smoke collection chamber. The smoke passage includes a left smoke inlet and a right smoke inlet arranged in a left-right direction.

[0014] Optionally, the smoke inlet is located on the upper wall of the smoke inlet groove, and the opening and closing mechanism is located on the upper side of the smoke inlet.

[0015] Optionally, an oil cup is provided below the smoke collection hood, the lower groove wall of the smoke inlet groove is inclined, and the upper side of the lower groove wall is close to the back plate of the smoke collection hood, while the lower side of the lower groove wall extends into the opening of the oil cup.

[0016] Optionally, the upper side of the lower tank wall is provided with a bent flange, the side of the bent flange away from the lower tank wall is connected to the back plate, and the bent flange and the back plate together form an oil guide groove, the oil guide groove is connected to the oil cup.

[0017] Optionally, the opening and closing mechanism is configured as a louver mechanism, each louver mechanism including a second driving device and multiple blades. The second driving device can drive the multiple blades to swing, so as to open and close the left smoke inlet and / or the right smoke inlet.

[0018] Optionally, the range hood further includes a detection device, which is communicatively connected to the processor of the range hood, so that the range hood can determine the amount of smoke and / or the smoke outlet position in the cooking environment based on the detection data obtained by the detection device, and then control the opening and closing state of the upper smoke inlet and / or the left smoke inlet and / or the right smoke inlet of the smoke collection hood according to the amount of smoke and / or the smoke outlet position.

[0019] The fume hood in this invention is equipped with both an upper fume inlet and a lower fume inlet. The lower fume inlet includes a left-side fume inlet and a right-side fume inlet arranged horizontally. The opening and closing states of the upper fume inlet, the left-side fume inlet, and the right-side fume inlet are all controllable. This allows the range hood to meet different fume extraction needs in different cooking scenarios. For example, but not limited to: when the amount of cooking smoke is small, simply opening the lower fume inlet is sufficient to meet the fume extraction needs; however, when the amount of cooking smoke is large, both the lower and upper fume inlets need to be opened simultaneously. This means the lower fume inlet cannot fully meet the fume extraction needs, causing some smoke to escape upwards, necessitating the opening of the upper fume inlet to assist in fume extraction; when the smoke outlet is higher than the lower fume inlet (this occurs with slim side-suction range hoods when using multi-layer steamers for cooking, due to the height of the steamers), the smoke tends to rise towards the lower fume inlet due to the thermal plume effect. For upward-facing stoves, opening the lower smoke inlet results in lower smoke extraction efficiency. In this case, the upper smoke inlet can be opened alone for smoke extraction. For cooking scenarios where the left burner is used for multi-layer steaming and the right burner for stir-frying, resulting in both high smoke levels and large smoke volumes, both the upper and lower smoke inlets need to be opened simultaneously for smoke extraction through vertical diversion. When using a stew pot on the left burner for simmering and a wok on the right burner for stir-frying, the smoke volume on the left is less than that on the right. In this case, both the left and right smoke inlets should be opened, with the right smoke inlet opening wider than the left, increasing the smoke volume on the right and decreasing the smoke volume on the left. When only a soup pot is used on the right burner for simmering, with no smoke on the left and a small amount of smoke on the right, the left smoke inlet can be closed, and only the right smoke inlet opened. Furthermore, in the process of switching from the closed state to the open state, the upper smoke inlet panel of the present invention moves towards the smoke collection chamber, so that the upper smoke inlet panel is located in the smoke collection chamber in the open state. In this way, even if the oil stains formed on the upper smoke inlet panel drip downwards, they will only drip into the smoke collection chamber, thereby preventing the oil stains on the upper smoke inlet panel from dripping onto the stove or cooking utensils, thus improving the user experience. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the range hood of the present invention;

[0022] Figure 2 for Figure 1 Side view of a central-range hood; the smoke collection hood is shown in cross-section, and the isolation cover is hidden;

[0023] Figure 3 for Figure 2 Another structural schematic diagram of the central control smoke hood;

[0024] Figure 4 for Figure 1 A structural diagram of a center-mounted range hood from another perspective; the back panel of the smoke collection hood is hidden.

[0025] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 for Figure 1 Exploded structural diagram of a center-draft range hood;

[0027] Figure 7 for Figure 1 A schematic diagram of the opening and closing mechanism of a center-suction range hood from one perspective;

[0028] Figure 8 for Figure 1 A structural schematic diagram of the opening and closing mechanism of a center-mounted range hood from another perspective; one side wall of the mounting frame is hidden.

[0029] Figure 9 for Figure 8 Enlarged view of point B in the middle;

[0030] Figure 10 for Figure 1 A schematic diagram of a partial cross-sectional structure at the lower end of a center-suction range hood;

[0031] Figure 11 for Figure 1 A schematic diagram illustrating the direction of cooking fumes from a central-draft range hood in a cooking scenario;

[0032] Figure 12 for Figure 1 A schematic diagram illustrating the direction of cooking fumes from a center-draft range hood in another cooking scenario;

[0033] Figure 13 for Figure 1 A schematic diagram illustrating the direction of cooking fumes from a center-draft range hood in another cooking scenario;

[0034] Figure 14 for Figure 1 A schematic diagram of the smoke distribution of a center-draft range hood in another cooking scenario;

[0035] Figure 15 for Figure 1A schematic diagram illustrating the direction of cooking fumes from a central-draft range hood in a cooking scenario.

[0036] Explanation of icon numbers:

[0037] 1. Smoke hood; 101. Smoke collection chamber; 102. Lower smoke inlet; 102a. Left smoke inlet; 102b. Right smoke inlet; 103. Smoke outlet; 104. Upper smoke inlet panel; 105. Upper smoke inlet; 11. Smoke inlet groove; 111. Upper groove wall; 112. Lower groove wall; 113. Bending and flanged edge; 114. Condensing plate; 115. Oil guide groove; 12. Opening and closing mechanism; 122. Blade; 122a. Locking protrusion; 123. Second drive device; 124. Transmission connecting rod; 125. Mounting position; 126. Second drive motor; 127. First gear; 128. 129. Second gear; 131. Separator rib; 132. Front panel; 133. Back panel; 14. Mounting frame; 141. Mounting slot; 15. Oil cup; 161. Rotating arm; 162. Adapter plate; 162a. First plate section; 162b. Second plate section; 17. First drive device; 171. Power component; 171a. First drive motor; 171b. Reducer; 172. Transmission mechanism; 172a. First connecting rod; 172b. Second connecting rod; 172c. Hook; 18. Limiting mechanism; 181. First limiting part; 182. Second limiting part; 19. Isolation cover

[0038] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0041] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0042] This invention proposes a range hood.

[0043] Reference Figures 1 to 3 In one embodiment of the present invention, the range hood includes:

[0044] The smoke hood 1 has a smoke collection chamber 101, an upper smoke inlet 105 communicating with the smoke collection chamber 101, and a lower smoke inlet 102 communicating with the smoke collection chamber 101. The lower smoke inlet 102 is located below the upper smoke inlet 105, and the lower smoke inlet 102 includes a left smoke inlet 102a and a right smoke inlet 102b.

[0045] The upper smoke inlet panel 104, which can be movably opened and closed, is also included.

[0046] The opening and closing mechanism 12 is provided on both the left smoke inlet 102a and the right smoke inlet 102b, so that both the left smoke inlet 102a and the right smoke inlet 102b can be opened and closed.

[0047] In this embodiment, the range hood is typically a side-draft range hood. For a side-draft range hood, its smoke collection hood 1 typically includes a back panel 132 and a front panel 131 opposite to the back panel 132, with the front panel 131 being inclined. Side-draft range hoods typically include slim side-draft range hoods and traditional side-draft range hoods.

[0048] For traditional side-suction range hoods, the smoke collection hood 1 is triangular in shape when viewed from the side, with the lower smoke inlet 102 and the upper smoke inlet 105 both located on the front panel 131.

[0049] For slim side-draft range hoods, the upper part of the front panel 131 extends obliquely to the middle or rear part of the top plate of the smoke collection hood 1. The smoke collection hood 1 is arranged in a near "7" shape when viewed from the side (see reference). Figure 2 Thus, the smoke hood 1 can be closer to the smoke source, shortening the smoke extraction path and improving smoke-locking efficiency during stir-frying. For slim side-suction range hoods, both the lower smoke inlet 102 and the upper smoke inlet 105 are located on the front panel 131. Optionally, the angle between the front panel 131 and the back panel 132 ranges from 10° to 30°, thus making the front panel 131 relatively vertical to reduce the space occupied by the smoke hood 1 in the user's operating space.

[0050] The fume hood 1 in the technical solution of this invention is provided with both an upper fume inlet 105 and a lower fume inlet 102. The lower fume inlet 102 includes a left fume inlet 102a and a right fume inlet 102b arranged horizontally. The opening and closing states of the upper fume inlet 105, the left fume inlet 102a, and the right fume inlet 102b are all controllable. This allows the range hood to meet different fume extraction needs in different cooking scenarios. For example, but not limited to, when the amount of cooking smoke is small, only the lower fume inlet 102 needs to be opened. It can meet the needs of fume extraction, but when the amount of cooking fumes is large, both the lower fume inlet 102 and the upper fume inlet 105 are opened simultaneously. This means the lower fume inlet 102 cannot fully meet the fume extraction needs, causing some fumes to escape upwards. Therefore, the upper fume inlet 105 needs to be opened simultaneously to assist in fume extraction. When the smoke outlet is higher than the lower fume inlet 102 (this occurs in slim side-suction range hoods when using multi-layer steamers for cooking, due to the height of the steamers), the fumes will escape upwards due to the heat... Since the plume flows upwards, opening the lower smoke inlet 102 results in lower smoke extraction efficiency. In this case, the upper smoke inlet can be opened alone for smoke extraction. For cooking scenarios where the left burner is used for multi-layer steaming and the right burner is used for stir-frying, there are situations where the smoke outlet is high and the smoke volume is large. In this case, both the upper smoke inlet 105 and the lower smoke inlet 102 need to be opened simultaneously to extract smoke through vertical diversion. When stewing is done on the left burner and stir-frying is done on the right burner, the amount of smoke generated on the left is less than that on the right. In this case, both the left smoke inlet 102a and the right smoke inlet 102b should be opened, with the opening degree of the right smoke inlet 102b greater than that of the left smoke inlet 102a, to increase the smoke intake on the right and decrease the smoke intake on the left. When soup is simmered only on the right burner, there is no smoke generated on the left and a small amount of smoke generated on the right. In this case, the left smoke inlet 102a can be closed, and only the right smoke inlet 102b can be opened.

[0051] In one embodiment, the upper smoke inlet panel 104 moves toward the smoke collection chamber 101 to open the upper smoke inlet port 105. In this embodiment, the upper smoke inlet panel 104 can open by rotating inward or sliding inward relative to the upper smoke inlet port 105, as long as the upper smoke inlet panel 104 moves toward the smoke collection chamber 101 during the process of opening the upper smoke inlet port 105.

[0052] In this embodiment, the upper smoke inlet panel 104 moves towards the smoke collection chamber 101 during the process of switching from the closed state to the open state. This ensures that the upper smoke inlet panel 104 is located inside the smoke collection chamber 101 in the open state. As a result, even if oil stains formed on the upper smoke inlet panel 104 drip downwards, they will only drip into the smoke collection chamber 101, thereby preventing oil stains on the upper smoke inlet panel 104 from dripping onto the stove or cooking utensils, thus improving the user experience.

[0053] Furthermore, referring to Figure 3 When the upper smoke inlet panel 104 opens the upper smoke inlet 105, there is a gap between the upper edge and the lower edge of the upper smoke inlet panel 104 and the upper smoke inlet 105. Thus, compared with the technical solution where the lower edge of the upper smoke inlet panel 104 is rotatably connected to the lower edge of the upper smoke inlet 105, the technical solution of this embodiment can better prevent oil stains from flowing from the lower edge of the upper smoke inlet 105 to the outside of the upper smoke inlet 105 through the lower edge of the upper smoke inlet panel 104.

[0054] Furthermore, when the upper smoke inlet panel 104 opens the upper smoke inlet 105, the upper smoke inlet panel 104 tilts upwards away from the upper smoke inlet 105. In this way, the upper smoke inlet panel 104 can guide the fumes upwards, meaning the fumes will be guided by the upper smoke inlet panel 104 towards the exhaust fan of the range hood, thereby improving the efficiency of fume extraction. It is worth mentioning that under the suction action of the exhaust fan, the fumes tend to flow upwards from the upper smoke inlet 105. In this embodiment, the upper smoke inlet panel 104, in its open state, is also tilted upwards, following the same flow trend of the fumes. That is, the upper smoke inlet panel 104, in its open state, can guide the fumes along their flow trend, better guiding the fumes and making the exhaust of fumes smoother.

[0055] Furthermore, the upper smoke inlet panel 104 is rotatably connected relative to the smoke collection hood 1, so as to realize the inward rotation and opening of the upper smoke inlet panel 104 relative to the upper smoke inlet 105, so that the upper smoke inlet panel 104 is inclined in the open state, so as to reuse it as a guide plate for guiding oil fumes to the exhaust fan. However, this design is not limited to this. In other embodiments, the upper smoke inlet panel 104 can also be slidably connected to the inner side of the front panel 131 of the smoke collection hood 1, so as to realize the upper smoke inlet panel 104 sliding and translating to the upper side or the lower side of the upper smoke inlet 105, so as to open the upper smoke inlet 105; or, the upper smoke inlet panel 104 can also be translated inward relative to the axis of the upper smoke inlet 105 to open.

[0056] For the rotated-open upper smoke inlet panel 104, optionally, refer to Figure 3 The range hood also includes a rotating arm 161. The upper smoke inlet panel 104 is fixedly connected to the upper end of the rotating arm 161, and the lower end of the rotating arm 161 is rotatably connected to the smoke collection hood 1. The rotating connection point of the rotating arm 161 is located below the upper smoke inlet 105. In this way, when the upper smoke inlet panel 104 is in the open state, there is a gap between the upper edge and the lower edge of the upper smoke inlet panel 104 and the upper smoke inlet 105. In this embodiment, two rotating arms 161 are provided, respectively located at opposite ends of the upper smoke inlet panel 104, to improve the stability of the opening and closing movement of the upper smoke inlet panel 104. Of course, in other embodiments, only one rotating arm 161 may be provided, which can also realize the rotational opening of the upper smoke inlet panel 104. In addition, in some embodiments, when the length of the upper smoke inlet panel 104 is very large, in order to avoid the middle of the upper smoke inlet panel 104 drooping, several rotating arms 161 may be added at the middle position of the upper smoke inlet panel 104, or multiple upper smoke inlet panels 104 may be arranged sequentially from left to right on the upper smoke inlet 105.

[0057] Optionally, the range hood further includes an adapter plate 162, which includes a first plate portion 162a and a second plate portion 162b that are bent and connected together. The first plate portion 162a is fixedly connected to the back side of the upper smoke inlet panel 104, and the second plate portion 162b is fixedly connected to the upper end of the rotating arm 161. In this embodiment, the first plate portion 162a and the upper smoke inlet panel 104 are connected by a plate-to-plate bonding method. This connection method has a larger connection area and higher connection stability, thereby reducing the probability of the upper smoke inlet panel 104 shaking during rotation. In this embodiment, the first plate portion 162a and the upper smoke inlet panel 104 are bonded or welded to ensure the integrity of the upper smoke inlet panel 104, thereby ensuring a good appearance of the upper smoke inlet panel 104; of course, this does not exclude the possibility that the first plate portion 162a and the upper smoke inlet panel 104 can be connected by screw fastening or riveting. Optionally, the rotating arm 161 is plate-shaped, so the second plate portion 162b and the rotating arm 161 are also connected by a plate-to-plate contact, which also has high connection stability. In this embodiment, the second plate portion 162b and the rotating arm 161 can be connected by screws or riveting for easy disassembly and maintenance; of course, this does not preclude the second plate portion 162b and the rotating arm 161 from being connected by adhesive or welding.

[0058] Furthermore, referring to Figure 2The range hood also includes a first driving device 17 disposed within the smoke collection hood 1. The first driving device 17 includes a power component 171 and a transmission mechanism 172. The power component 171 drives the upper smoke inlet panel 104 to open and close via the transmission mechanism 172. In this embodiment, the power component 171 indirectly drives the upper smoke inlet panel 104 via the transmission mechanism 172, which facilitates the rational selection of the installation position 125 of the power component 171. For a technical solution with the rotating arm 161, the power component 171 is connected to the rotating arm 161 via the transmission mechanism 172. However, this design is not limited to this. In other embodiments, the first driving device 17 may not have the transmission mechanism 172, but may directly connect the drive shaft of the power component 171 to the rotation connection point of the rotating arm 161. Without loss of generality, in this embodiment, the connection position of the transmission mechanism 172 and the rotating arm 161 is usually located close to the upper end of the rotating arm 161, that is, spaced apart from the rotation connection point of the rotating arm 161, so as to facilitate the rotation of the rotating arm 161. Optionally, the power component 171 includes a first drive motor 171a and a reducer 171b connected together. The output shaft of the reducer 171b is connected to the rotating arm 161 through the transmission mechanism 172. The arrangement of the reducer 171b can increase the driving torque of the power component 171.

[0059] Optionally, refer to as well. Figure 4 and Figure 5 In this embodiment, the transmission mechanism 172 is configured as a linkage mechanism, and the longer length of the linkage is more conducive to the rational selection of the mounting position 125 of the power component 171. However, this design is not limited to this; in other embodiments, the transmission mechanism 172 can also be configured as a gear mechanism, etc.

[0060] Optionally, the linkage mechanism includes a first link 172a and a second link 172b rotatably connected. The end of the first link 172a away from the second link 172b is rotatably connected to the power member 171, and the end of the second link 172b away from the first link 172a is used to drive the opening and closing of the upper smoke inlet panel 104. It can be understood that the linkage mechanism in this embodiment is a multi-link structure. Multiple links are advantageous for increasing the length, thus facilitating the rational selection of the mounting position 125 of the power member 171. In the technical solution with the rotating arm 161, the end of the second link 172b away from the first link 172a is rotatably connected to the rotating arm 161.

[0061] Furthermore, a limiting mechanism 18 is provided between the transmission mechanism 172 and the smoke collection hood 1 to limit the maximum movement of the upper smoke inlet panel 104, thereby preventing the upper smoke inlet panel 104 from continuing to rotate outward in the closed state and creating a gap between the upper smoke inlet panel 104 and the upper smoke inlet 105. This would not only affect the product's appearance but also give insects and other creatures the opportunity to enter the smoke collection chamber 101, and / or prevent the upper smoke inlet panel 104 from rotating excessively inward relative to the upper smoke inlet 105, making it difficult for the upper smoke inlet panel 104 to return to the closed state.

[0062] In one embodiment, the limiting mechanism 18 includes a first limiting part 181 disposed on the smoke collection hood 1. In the closed state, the transmission mechanism 172 engages with the first limiting part 181 to limit the outward rotation of the upper smoke inlet panel 104 relative to the upper smoke inlet 105, thereby preventing the upper smoke inlet panel 104 from continuing to rotate outward in the closed state and causing a gap between the upper smoke inlet panel 104 and the upper smoke inlet 105. For an embodiment with a first connecting rod 172a and a second connecting rod 172b, optionally, the first limiting part 181 is configured as a first limiting protrusion disposed on the side wall of the smoke collection chamber 101. A hook 172c is bent at the end of the first connecting rod 172a away from the second connecting rod 172b. In the closed state, the hook 172c overlaps and limits the first limiting protrusion, thereby limiting the outward rotation of the upper smoke inlet panel 104 relative to the upper smoke inlet 105. Optionally, the first limiting protrusion includes a mounting plate and a first limiting plate that are bent and connected together. The mounting plate is fixed to the side wall of the smoke collection chamber 101. In the closed state, the hook 172c overlaps and limits the first limiting plate.

[0063] In another embodiment, the limiting mechanism 18 includes a second limiting part 182 disposed on the smoke collection hood 1. When the transmission mechanism 172 is engaged with the second limiting part 182, the inward rotation of the upper smoke inlet panel 104 relative to the upper smoke inlet 105 is restricted, thereby preventing the upper smoke inlet panel 104 from rotating excessively inward relative to the upper smoke inlet 105, which would make it difficult for the upper smoke inlet panel 104 to return to the closed state. For the scheme with the first connecting rod 172a and the second connecting rod 172b, optionally, the second limiting part 182 is configured as a second limiting protrusion protruding inside the smoke collection cavity 101. When the first connecting rod 172a is engaged with the second limiting protrusion, the inward rotation of the upper smoke inlet panel 104 relative to the upper smoke inlet 105 is restricted.

[0064] In another embodiment, the limiting structure may also include the first limiting part 181 and the second limiting part 182, so as to prevent the upper smoke inlet panel 104 from continuing to rotate outward in the closed state and creating a gap between the upper smoke inlet panel 104 and the upper smoke inlet 105, and to prevent the upper smoke inlet panel 104 from rotating excessively inward relative to the upper smoke inlet 105, which would make it difficult for the upper smoke inlet panel 104 to return to the closed state.

[0065] In one embodiment, the fume hood 1 is provided with an isolation cover 19, and the power component 171 is installed inside the isolation cover 19. This embodiment, by adding the isolation cover 19, reduces the probability of the power component 171 being contaminated by oil fumes, thereby extending the service life of the power component 171. It can be understood that the connection structure between the power component 171 and the transmission mechanism 172 is movably inserted through the isolation cover 19; without loss of generality, the output shaft of the power component 171 is movably inserted through the isolation cover 19 to be fixedly connected to the transmission mechanism 172; for technical solutions with a first connecting rod 172a and a second connecting rod 172b, after the output shaft of the power component 171 movably passes through the isolation cover 19, it is fixedly connected to the end of the first connecting rod 172a away from the second connecting rod 172b to drive the first connecting rod 172a to rotate. Optionally, the first limiting protrusion is configured as a bent limiting plate on the isolation cover 19.

[0066] In one embodiment, reference is made to Figure 1 , Figure 3 and Figure 10 The lower smoke inlet 102 is provided with a smoke inlet groove 11 that is recessed into the smoke collection cavity 101. The smoke inlet groove 11 is provided with a smoke passage 103 that communicates with the smoke collection cavity 101. The smoke passage 103 includes a left smoke inlet 102a and a right smoke inlet 102b arranged in the left-right direction.

[0067] In this embodiment, when external fumes pass through the opening and closing mechanism 12, oil stains may remain on the opening and closing mechanism 12 and may accumulate into oil droplets. However, since the opening and closing mechanism 12 in this solution is located in the smoke inlet 103, and the smoke inlet 103 is located in the smoke inlet groove 11 that is recessed into the smoke collection chamber 101, even if oil droplets fall from the opening and closing mechanism 12, they will only drip into the smoke inlet groove 11 or the smoke collection chamber 101, and will not drip onto the stove or cooking utensils, thereby improving the user experience.

[0068] Furthermore, the smoke inlet 103 is located on the upper groove wall 111 of the smoke inlet groove 11, and the opening and closing mechanism 12 is located on the upper side of the smoke inlet 103, that is, the opening and closing mechanism 12 is located on the top side of the smoke inlet groove 11. This makes it virtually impossible for the user to see the opening and closing mechanism 12 even when looking through the lower smoke inlet 102, thus hiding the opening and closing mechanism 12. Oil stains on the opening and closing mechanism 12 will not be visible to the user, further improving the user experience. Optionally, the upper groove wall 111 can be formed by bending a portion of the front panel 131, thereby facilitating the processing of the smoke inlet groove 11.

[0069] Furthermore, an oil cup 15 is provided below the smoke collection hood 1. The lower groove wall 112 of the smoke inlet groove 11 is inclined, and the upper side of the lower groove wall 112 is close to the back plate 132 of the smoke collection hood 1. The lower side of the lower groove wall 112 extends into the opening of the oil cup 15. In this embodiment, the lower groove wall 112 extends obliquely downward from near the back plate 132 of the smoke collection hood 1 to the opening of the oil cup 15, thereby further guiding the oil droplets dripping from the opening and closing mechanism 12 and ensuring that they flow smoothly into the oil cup 15. Optionally, a condenser plate 114 is provided on the side of the lower groove wall 112 facing the smoke inlet groove 11. The condenser plate 114 can perform preliminary cooling and condensation of the oil fumes. When the high-temperature oil fumes encounter the relatively low-temperature condenser plate 114, the oil mist particles in the oil fumes will liquefy due to cooling and condense on the plate surface. These condensed oil droplets will flow into the oil cup 15 along the plate surface, thereby achieving the separation of grease and smoke and reducing the burden on the exhaust fan.

[0070] Furthermore, a bent flange 113 is provided on the upper side of the lower groove wall 112. The side of the bent flange 113 away from the lower groove wall 112 is connected to the back plate 132, and the bent flange 113 and the back plate 132 together form an oil guide groove 115, which is connected to the oil cup 15. If the lower groove wall 112 is directly connected to the back plate 132 of the fume hood 1 and does not form an oil guide groove 115, the oil flowing down along the back plate 132 will also flow along the lower groove wall 112 to the oil cup 15, which may result in excessive oil stains on the lower groove wall 112, making it easy to get dirty and hindering the maintenance of appearance cleanliness, thus causing unnecessary cleaning burden. Therefore, the lower tank wall 112 is provided with a bent flange 113. On the one hand, this helps to fix the lower tank wall 112 to the back plate 132. On the other hand, the bent flange 113 and the back plate 132 form an oil guide groove 115, so that the oil flowing down from the back plate 132 can flow directly to the oil cup 15 through the oil guide groove 115, which helps to share the oil guiding pressure of the lower tank wall 112 and reduce the cleaning burden on the user. In order to facilitate the connection between the oil guide groove 115 and the oil cup 15, the bent flange 113 can be provided with a through hole. The oil guide groove 115 connects to the oil cup 15 through the through hole. Alternatively, the length of the bent flange 113 in the left and right direction can be slightly smaller than the length of the lower tank wall 112 in the left and right direction, so as to form a break at both ends of the oil guide groove 115 to achieve the connection between the oil guide groove 115 and the oil cup 15.

[0071] Furthermore, referring to Figures 6 to 9 The opening and closing mechanism 12 is configured as a louver mechanism, which includes a second driving device 123 and multiple blades 122. The second driving device 123 can drive the multiple blades 122 to swing, thereby opening and closing the left smoke inlet 102a and / or the right smoke inlet 102b. In this embodiment, the two louver mechanisms can move independently. The second driving device 123 is connected to one side of the blades 122, so that the multiple blades 122 rotate synchronously around the same side as an axis, thereby controlling the opening and closing of the left smoke inlet 102a and the right smoke inlet 102b respectively, and even adjusting the smoke flow of the left smoke inlet 102a and the right smoke inlet 102b respectively, thereby further enriching the usage scenarios of the range hood.

[0072] Furthermore, the second drive device 123 is connected to the upper side of the blade 122. The second drive device 123 can drive multiple blades 122 to rotate downward with their upper side as the axis to open the corresponding smoke inlet. That is, when the louver mechanism is opened, the blade 122 rotates downward as a whole. In other words, the louver mechanism is opened in an outward opening form, which makes it convenient to clean the blade 122.

[0073] Furthermore, when the lower smoke inlet 102 is open, the upper sides of the blades 122 of the two louver mechanisms are close together, and the lower sides of the blades 122 of the two louver mechanisms are far apart. That is, when both louver mechanisms are open, the blades 122 of the two louver mechanisms are symmetrical and together form a figure-eight shape (see...). Figure 13 Thus, when the left smoke inlet 102a and the right smoke inlet 102b are opened simultaneously, the blades 122 of the two louver mechanisms can work together to form a smoke-gathering effect at the smoke inlet groove 11, thereby further reducing the possibility of oil fumes escaping and improving the smoke extraction effect of the range hood.

[0074] To achieve synchronous rotation of multiple blades 122, in one embodiment, referring to Figures 6 to 9 The louver mechanism also includes a transmission link 124, which has multiple mounting positions 125. A blade 122 is mounted in one mounting position 125. The transmission link 124 moves left and right along the range hood to cause the multiple blades 122 to swing. Optionally, the mounting position 125 is configured as a mounting hole in the transmission link 124. A locking protrusion 122a is provided on one side of the blade 122, which passes through the mounting hole and engages with the periphery of the mounting hole, thereby facilitating the quick installation of the transmission link 124 and the multiple blades 122.

[0075] Furthermore, the second drive device 123 includes a second drive motor 126, a first gear 127, and a second gear 128. The first gear 127 is rotatably connected to the output end of the second drive motor 126, and the second gear 128 is driveably connected to one of the multiple blades 122. The first gear 127 and the second gear 128 mesh and drive each other. The second drive motor 126 drives the first gear 127 to rotate, thereby driving the second gear 128 to drive one of the multiple blades 122 to swing, thereby causing the transmission link 124 to move in the left and right direction of the range hood, thereby realizing the synchronous rotation of the multiple blades 122.

[0076] To facilitate the arrangement of the second drive device 123, in one embodiment, see [reference needed]. Figure 1 , Figures 6 to 9The smoke inlet 103 is provided with a partition rib 129 to separate the left smoke inlet 102a and the right smoke inlet 102b. At least a portion of the two second drive devices 123 are disposed on the partition rib 129. Specifically, the partition rib 129 can separate the smoke inlet 103, and the partition rib 129 can also be used for the installation of the second drive devices 123; in addition, at least a portion of the second drive devices 123 are disposed on the side of the partition rib 129 opposite to the smoke inlet groove 11, thereby further reducing the adhesion of oil fumes and improving service life. Optionally, two mounting frames 14 arranged along the left and right direction of the range hood are provided at the smoke outlet 103. A louver mechanism is provided in one mounting frame 14, and multiple blades 122 are rotatably installed on opposite sides of the mounting frame 14. The two ends of the two mounting frames 14 that are close to each other form the partition rib 129, and the two ends of the two mounting frames 14 that are close to each other are provided with mounting grooves 141. The second drive motor 126 is located in the mounting groove 141. The first gear 127 is rotatably installed on the groove wall of the mounting groove 141, and the second gear 128 is also rotatably installed on the mounting frame 14 and rotatably connected to the blades 122 on the side close to the second drive motor 126, thereby facilitating the installation of the louver mechanism and ensuring the structural compactness of the second drive device 123.

[0077] Furthermore, the range hood also includes a detection device (not shown), which is communicatively connected to the processor of the range hood so that the range hood can determine the amount of smoke and / or the smoke outlet position in the cooking environment based on the detection data obtained by the detection device, and then control the opening and closing state of the upper smoke inlet 105 and / or the left smoke inlet 102a and / or the right smoke inlet 102b of the smoke collection hood 1 according to the amount of smoke and / or the smoke outlet position.

[0078] In this invention, the detection device can be mounted on the range hood to facilitate communication between the detection device and the range hood's processor. Alternatively, the detection device can be an external device independent of the range hood, as long as it can communicate with the range hood's processor. In this invention, the detection device can feed back detection data to the range hood's processor, allowing the processor to determine the amount of smoke and / or the smoke emission location in the cooking environment. Alternatively, for detection devices with their own computing power, they can determine the amount of smoke and / or the smoke emission location themselves before feeding this information back to the range hood's processor, thus reducing the workload of the processor. In this invention, the smoke outlet position refers to the location of the smoke point, which may include the height of the smoke outlet. It is understood that due to different stove heights, the height of the smoke outlet for the same cooking appliance may be different, or for the same stove, different cooking appliances with different heights may also result in different heights of the smoke outlet. It may also include the smoke outlet being located on the left or right side below the range hood. For example, for a dual-burner stove, the smoke may be emitted from the cooking appliance on the left burner, in which case the smoke outlet is located on the left side below the range hood; or the smoke may be emitted from the cooking appliance on the right burner, in which case the smoke outlet is located on the right side below the range hood.

[0079] The technical solution of this invention first determines the amount of smoke and / or the smoke outlet position in the cooking environment based on the detection data obtained by the detection device, and then controls the opening and closing state of the upper smoke inlet 105 and / or lower smoke inlet 102 of the smoke collection hood 1 according to the amount of smoke and / or the smoke outlet position. For example, when the amount of smoke is less than a first preset value, only controlling the lower smoke inlet 102 to open is sufficient to meet the smoke extraction requirements, while when the amount of smoke is greater than a second preset value, the second preset value is greater than or equal to the first preset value, and both the lower smoke inlet 102 and the upper smoke inlet 105 are controlled simultaneously. When the lower smoke inlet 102 is opened, it cannot fully meet the demand for smoke extraction, causing some smoke to escape upwards. Therefore, the upper smoke inlet 105 needs to be opened simultaneously to assist in smoke extraction. For example, when the smoke outlet is higher than the lower smoke inlet 102 (this occurs with slim side-draft range hoods when using multi-layer steamers for cooking), the smoke rises due to the heat plume, resulting in lower smoke extraction efficiency with the lower smoke inlet 102 open. In this case, the upper smoke inlet can be opened separately for smoke extraction (see...). Figure 11 For example, in a cooking scenario where the left burner is used for multi-layer steaming and the right burner is used for stir-frying, there may be situations where the smoke exhaust point is high and the smoke volume is large. In such cases, it is necessary to open both the upper smoke inlet 105 and the lower smoke inlet 102 simultaneously for smoke exhaust (see...). Figure 12 In other words, the technical solution of the present invention can meet the different fume extraction needs of different cooking scenarios.

[0080] In this invention, the preset value of the smoke volume (including the first preset value and the second preset value) generally refers to the concentration of particulate matter or pollutants in the air. When the smoke volume is less than the first preset value, that is, when the current smoke concentration is less than the first preset concentration value, the smoke concentration is low, and the smoke inlet only needs to be opened to meet the smoke extraction requirements. However, this design is not limited to this. In other embodiments, the preset value of the smoke volume can also refer to the optical density value of the smoke. Optical density reflects the smoke concentration by measuring the degree to which the smoke blocks light, and the larger the value, the higher the smoke concentration.

[0081] In one embodiment, the detection device may include a ranging device, and the detection data includes height data acquired based on the ranging device. The processor of the range hood can determine the type of cooking appliance based on the height data, and then determine whether there is a smoke outlet position higher or lower than a preset height based on the type of cooking appliance.

[0082] In this embodiment, the ranging device can be configured as a ranging sensor on the front panel 131 of the smoke hood 1, and the ranging sensor can be rotated to scan the height of different positions of the cooking appliance by rotating the ranging sensor, thereby obtaining height data for characterizing the outline of the corresponding cooking appliance, and then determining the type of the corresponding cooking appliance (steamer, wok, soup pot, frying pan, etc.). It can be understood that the smoke outlet height of different types of cooking appliances is usually different. For example, the smoke outlet height of a steamer is usually higher than that of a soup pot, the smoke outlet height of a soup pot is usually higher than that of a wok, and the smoke outlet height of a wok is usually higher than that of a frying pan.

[0083] In some other embodiments, the ranging sensor may be non-rotating. In this case, multiple ranging sensors can be used, for example, forming a ranging sensor array, to measure the height of different positions of the cooking appliance. In still other embodiments, the type of cooking appliance can be determined simply by the highest detected data, without needing to characterize the outline of the cooking appliance through a series of height data. In yet another embodiment, the highest detected data can be used simply as the height of the smoke vent of the cooking appliance, without needing to first determine the type of cooking appliance and then determine the height of the smoke vent.

[0084] In another embodiment, the detection device may include a vision device, and the detection data includes image data acquired based on the vision device; the processor of the range hood can determine the type of cooking appliance based on the image data, and then determine whether there is a smoke outlet position higher or lower than a preset height based on the type of cooking appliance.

[0085] In this embodiment, the vision device includes a downward-facing camera mounted on the front panel 131 of the fume hood 1. The camera acquires actual images of the cooking utensils on the stove and matches them with pre-stored images of the cooking utensils to determine the type of the corresponding cooking utensils (steamer, wok, soup pot, frying pan, etc.). It is understood that the smoke outlet height of different types of cooking utensils is usually different. For example, the smoke outlet height of a steamer is usually higher than that of a soup pot, the smoke outlet height of a soup pot is usually higher than that of a wok, and the smoke outlet height of a wok is usually higher than that of a frying pan.

[0086] In another embodiment, the detection device may further include both the ranging device and the vision device. In this embodiment, the type of cooking utensil is first determined independently using both height data and image data. Only if the types determined by the two methods match can the type of cooking utensil be confirmed; if the types determined by the two methods differ, a new determination is required. This embodiment uses two determination methods to corroborate the determination of the cooking utensil type, effectively improving the accuracy of the determination.

[0087] Additionally, the detection device may also include a smoke sensor and / or a vision device for acquiring smoke volume data. The smoke sensor can directly acquire smoke volume data, while the vision device can identify the amount of smoke from cooking images. This allows the range hood's processor to control the opening and closing states of the upper smoke inlet 105 and / or the left smoke inlet 102a and / or the right smoke inlet 102b based on the smoke volume data. For example, but not limited to, when the smoke volume on the left and right sides below the smoke hood 1 is equivalent, typically corresponding to cooking with the same cooking appliances on both burners, the left smoke inlet 102a and the right smoke inlet 102b are controlled to open to equivalent degrees (see...). Figure 13 This ensures that the left smoke inlet 102a and the right smoke inlet 102b have a considerable negative pressure for smoke extraction, thus evenly distributing the smoke to the left and right sides. When the amount of smoke on one side of the lower left and right sides of the smoke hood 1 is greater than the amount of smoke on the other side, typically corresponding to cooking with different cooking appliances on two burners, the opening of the left smoke inlet 102a or the right smoke inlet 102b corresponding to the side with the greater smoke volume is controlled to be greater than the opening of the other (see...). Figure 14 and Figure 15 This allows for a greater negative pressure at the smoke inlet on the side with a larger volume of smoke, enabling a reasonable distribution of the negative pressure at the smoke exhaust fan. This, in turn, reduces the working air volume and noise of the smoke exhaust fan.

[0088] The above description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention. All equivalent structural transformations made under the inventive concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A range hood, characterized in that, include: A smoke hood has a smoke collection chamber, an upper smoke inlet communicating with the smoke collection chamber, and a lower smoke inlet communicating with the smoke collection chamber. The lower smoke inlet is located below the upper smoke inlet and includes a left smoke inlet and a right smoke inlet. The upper smoke inlet panel can be movably opened and closed, and the upper smoke inlet panel can move into the smoke collection chamber to open the upper smoke inlet; as well as The opening and closing mechanism is provided for both the left smoke inlet and the right smoke inlet, so that both the left smoke inlet and the right smoke inlet can be opened and closed movably; When the upper smoke inlet panel opens the upper smoke inlet, there is a gap between the upper edge and the lower edge of the upper smoke inlet panel and the upper smoke inlet; The lower smoke inlet is provided with a smoke inlet groove recessed into the smoke collection chamber. The smoke inlet groove is provided with a smoke passage opening communicating with the smoke collection chamber. The smoke passage opening includes a left smoke inlet opening and a right smoke inlet opening arranged in a left-right direction. The smoke passage opening is located on the upper groove wall of the smoke inlet groove. The opening and closing mechanism is located on the upper side of the smoke passage opening.

2. The range hood as described in claim 1, characterized in that, The range hood also includes a rotating arm, the upper smoke inlet panel is fixedly connected to the upper end of the rotating arm, the lower end of the rotating arm is rotatably connected to the smoke collection hood, and the rotating connection point of the rotating arm is located below the upper smoke inlet.

3. The range hood as described in claim 1, characterized in that, When the upper smoke inlet panel opens the upper smoke inlet, the upper smoke inlet panel tilts from bottom to top in a direction away from the upper smoke inlet.

4. The range hood as described in claim 1, characterized in that, The range hood also includes a first driving device disposed inside the smoke collection hood. The first driving device includes a power component and a transmission mechanism. The power component drives the upper smoke inlet panel to open and close through the transmission mechanism.

5. The range hood as described in claim 4, characterized in that, The transmission mechanism is configured as a linkage mechanism.

6. The range hood as described in claim 4, characterized in that, The smoke collection hood is equipped with an isolation cover, and the power component is installed inside the isolation cover; A limiting mechanism is provided between the transmission mechanism and the smoke collection hood. The limiting mechanism includes a bent limiting plate provided on the isolation cover. When the transmission mechanism and the bent limiting plate are engaged in a limiting cooperation, the outward rotation of the upper smoke inlet panel relative to the upper smoke inlet is restricted.

7. The range hood as described in claim 1, characterized in that, An oil cup is provided below the smoke collection hood. The lower wall of the smoke inlet groove is inclined, and the upper side of the lower wall is close to the back plate of the smoke collection hood. The lower side of the lower wall extends into the opening of the oil cup.

8. The range hood as described in claim 7, characterized in that, The upper side of the lower tank wall is provided with a bent flange. The side of the bent flange away from the lower tank wall is connected to the back plate, and the bent flange and the back plate together form an oil guide groove, which is connected to the oil cup.

9. The range hood as described in claim 1, characterized in that, The opening and closing mechanism is configured as a louver mechanism, each of which includes a second driving device and multiple blades. The second driving device can drive the multiple blades to swing, thereby opening and closing the left smoke inlet and / or the right smoke inlet.

10. The range hood as described in claim 9, characterized in that, When the left and right smoke inlets are opened simultaneously, the upper sides of the blades of the two louver mechanisms are close to each other, and the lower sides of the blades of the two louver mechanisms are far apart.

11. The range hood according to any one of claims 1 to 10, characterized in that, The range hood also includes a detection device, which is communicatively connected to the processor of the range hood, so that the range hood can determine the amount of smoke and / or the smoke outlet position in the cooking environment based on the detection data obtained by the detection device, and then control the opening and closing state of the upper smoke inlet and / or the left smoke inlet and / or the right smoke inlet of the smoke collection hood according to the amount of smoke and / or the smoke outlet position.

12. The range hood as described in claim 11, characterized in that, The detection device includes a ranging device, and the detection data includes height data obtained based on the ranging device. The processor of the range hood can determine the type of cooking appliance based on the height data, and then determine whether there is a smoke outlet position that is higher or lower than a preset height based on the type of cooking appliance. The ranging device is configured as a ranging sensor on the front panel of the fume hood. The ranging sensor is rotatable so that the height of different positions of the cooking appliance can be scanned by the rotation of the ranging sensor, thereby obtaining height data to characterize the outline of the corresponding cooking appliance and thus determining the type of the corresponding cooking appliance. Alternatively, the ranging device may include multiple ranging sensors forming a ranging sensor array to measure the height of different positions of the cooking appliance.

Images