A range hood

Abstract

This application discloses a range hood, including a housing, a fan assembly, a first airflow guide assembly, and a second airflow guide assembly. The housing has a receiving cavity, a first smoke inlet, and a second smoke inlet. The fan assembly has a first air inlet and a second air inlet. A first air duct is formed between the first airflow guide assembly and the inner wall surface of the housing, and the first air duct communicates with the first smoke inlet and the first air inlet. A second air duct is formed between the second airflow guide assembly and the inner wall surface of the housing, and the second air duct communicates with the second smoke inlet and the second air inlet. The second air duct is independent of the first air duct. This application makes the second air duct independent of the first air duct, so that when both the first and second smoke inlets are open, the fumes drawn in through the first smoke inlet and the fumes drawn in through the second smoke inlet will not come into contact, and the two will not form an airflow vortex, thus reducing noise.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and more particularly to a range hood. Background Technology

[0002] With the improvement of living standards, range hoods have gradually become an indispensable appliance in people's kitchens. Range hoods operate on the principle of fluid dynamics, using a fan assembly installed inside to draw in and exhaust cooking fumes, quickly removing harmful oil fumes generated during cooking and venting them outdoors, thus reducing air pollution in the kitchen. However, among related technologies, range hoods tend to be noisy during use, resulting in a poor user experience. Summary of the Invention

[0003] This application provides a range hood to solve the problems of excessive noise and poor user experience in related technologies. The technical solution is as follows;

[0004] In a first aspect, embodiments of this application provide a range hood, including:

[0005] The outer shell has a receiving cavity and a first smoking port and a second smoking port communicating with the receiving cavity;

[0006] A fan assembly is disposed within the receiving cavity, and the fan assembly has a first air inlet and a second air inlet spaced apart from the first air inlet.

[0007] A first airflow guiding component is disposed within the receiving cavity and forms a first air duct between itself and the inner wall of the outer shell. The first air duct is connected to the first smoke inlet and the first air inlet.

[0008] The second airflow guide assembly is disposed within the receiving cavity and forms a second air duct between itself and the inner wall of the outer shell. The second air duct is connected to the second smoke inlet and the second air inlet, and the second air duct is independent of the first air duct.

[0009] The range hood of this embodiment features a casing with two smoke inlets and a fan assembly with two air inlets. Each smoke inlet is connected to its corresponding air inlet via a duct, ensuring that the fumes drawn in by the two smoke inlets are independent and do not come into contact with each other, thus preventing the formation of airflow vortices and achieving noise reduction. Furthermore, the design of two smoke inlets and two air inlets improves the range hood's fume absorption performance compared to a single air inlet and a single smoke inlet design. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the front view structure of a range hood provided in one embodiment of this application;

[0012] Figure 2 yes Figure 1 The diagram shown is a three-dimensional structural schematic of the range hood with the opening and closing components in the first position;

[0013] Figure 3 yes Figure 1 The diagram shown is a three-dimensional structural schematic of the range hood with the opening and closing components in the second position.

[0014] Figure 4 yes Figure 1 The diagram shows a cross-sectional view of the range hood.

[0015] Figure 5 yes Figure 1 The diagram shown is a three-dimensional exploded view of a range hood.

[0016] Figure 6 yes Figure 4 Schematic diagram of the cross-sectional structure along the AA direction;

[0017] Figure 7 yes Figure 4 A schematic diagram of a local structure in the image;

[0018] Figure 8 yes Figure 1 The diagram shown is a structural schematic of the first baffle plate in the range hood.

[0019] Figure 9 yes Figure 1 The diagram shown illustrates the structure of the second baffle plate in the range hood.

[0020] Figure 10 yes Figure 1 The diagram shown illustrates the structure of the third baffle plate in the range hood.

[0021] Figure 11 yes Figure 4 Corresponding noise radiation diagram;

[0022] Figure 12 yes Figure 4 A schematic diagram of noise radiation in the cross-sectional view at point AA;

[0023] Figure 13 yes Figure 4 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0024] Figure 14 yes Figure 1 The diagram shows the structure of the fourth baffle plate in the range hood.

[0025] Figure Descriptions: 10. Range hood; 11. Outer shell; 111. First receiving cavity; 112. First smoke inlet; 1121. First sub-smoke inlet; 113. Second smoke inlet; 114. Base plate; 115. First side plate; 116. Second side plate; 117. Smoke collection chamber; 118. Main housing of the range hood; 119. Smoke collection chamber housing; 12. Fan assembly; 121. First air inlet; 122. Second air inlet; 123. Volute; 124. Impeller; 13. First air guide assembly; 131. First air duct; 1311. First sub-air duct; 1312. Second sub-air duct; 132. First guide plate; 1321. First sub-guide plate; 1322. Second sub-guide plate; 133. Second guide plate; 134. Third guide plate; 135, First sound-absorbing layer; 136, Second sound-absorbing layer; 137, Third sound-absorbing layer; 1371, First sub-sound-absorbing layer; 1372, Second sub-sound-absorbing layer; 1373, Third sub-absorption layer; 14, Second guide assembly; 141, Second air duct; 1411, Third sub-air duct; 1412, Fourth sub-air duct; 142, Fourth guide plate; 1421, Third sub-guide plate; 1422, Fourth sub-guide plate; 143, Noise reduction cavity; 144, Fifth guide plate; 145, Fourth sound-absorbing layer; 15, Opening and closing assembly; 151, First cover plate; 152, Second cover plate; 153, Third cover plate; 16, Check valve; 17, Oil cup; p, First direction; q, Second direction; t, Third direction. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0027] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0028] Please see Figures 1 to 3 This application provides a range hood 10. The range hood 10 can be used in the kitchen and installed near the stove surface. The range hood 10 can absorb the oil fumes generated by the cookware on the stove surface during cooking, preventing the oil fumes from filling the kitchen and affecting the user's cooking experience.

[0029] Specifically, in combination Figures 2 to 4 The range hood 10 includes a housing 11 and a fan assembly 12. The housing 11 forms a first receiving cavity 111 and a first smoke inlet 112 and a second smoke inlet 113 communicating with the first receiving cavity 111. The fan assembly 12 is disposed in the first receiving cavity 111 and is used to generate negative pressure suction so that the fumes can be drawn into the first receiving cavity 111 of the housing 11 through the first smoke inlet 112 and / or the second smoke inlet 113, thereby reducing the fumes generated during cooking in the kitchen.

[0030] The fan assembly 12 may have a first air inlet 121 and a second air inlet 122 spaced apart from the first air inlet 121. Both the first air inlet 121 and the second air inlet 122 can draw in and exhaust oil fumes.

[0031] Combination Figure 4 and Figure 5 The range hood 10 in this embodiment further includes a first airflow guiding component 13. The first airflow guiding component 13 is disposed within the first receiving cavity 111 of the outer casing 11, and forms a first air duct 131 between itself and the inner wall surface of the outer casing 11. The first air duct 131 communicates with the first smoke inlet 112 and the first air inlet 121. The formation of the first air duct 131 within the outer casing 11, connecting the first smoke inlet 112 and the first air inlet 121, allows the fumes entering through the first smoke inlet 112 to reach the first air inlet 121 of the fan assembly 12 more smoothly under the guidance of the first air duct 131, making the smoke extraction of the range hood 10 smoother.

[0032] The range hood 10 of this embodiment further includes a second airflow guiding assembly 14. The second airflow guiding assembly 14 is disposed within the first receiving cavity 111 of the outer casing 11, and forms a second air duct 141 between itself and the inner wall surface of the outer casing 11. The second air duct 141 communicates with the second smoke inlet 113 and the second air inlet 122. The formation of the second air duct 141 within the outer casing 11, which connects the second smoke inlet 113 and the second air inlet 122, allows the fumes entering through the second smoke inlet 113 to reach the second air inlet 122 of the fan assembly 12 more smoothly under the guidance of the second air duct 141, making the smoke extraction of the range hood 10 smoother.

[0033] The second air duct 141 is independent of the first air duct 131, so that when both the first smoke inlet 112 and the second smoke inlet 113 are open, the oil fumes drawn in through the first smoke inlet 112 and the oil fumes drawn in through the second smoke inlet 113 will not come into contact and will not form an airflow vortex, thus reducing noise.

[0034] When both the first smoke inlet 112 and the second smoke inlet 113 are open, the working principle of the range hood 10 is as follows: When the fan assembly 12 is working, it generates negative pressure suction, which allows the fumes sucked in by the first smoke inlet 112 to enter the fan assembly 12 through the first air duct 131 and the first air inlet 121, and then be discharged outdoors through the exhaust pipe connected to the fan assembly 12; at the same time, the fumes sucked in by the second smoke inlet 113 can enter the fan assembly 12 through the second air duct 141 and the second air inlet 122, and then be discharged outdoors through the exhaust pipe connected to the fan assembly 12.

[0035] Specifically, in combination Figure 4 The fan assembly 12 may include a volute 123 and an impeller 124. The volute 123 may form a second receiving cavity (not shown in the figure) and a first air inlet 121, a second air inlet 122, and an air outlet (not shown in the figure) communicating with the second receiving cavity. The air outlet may be connected to an exhaust duct. The impeller 124 may be located inside the second receiving cavity. The impeller 124 is used to generate negative pressure suction when rotating, so that the fumes can be drawn into the second receiving cavity of the volute 123 through the first smoke inlet 112 and the second smoke inlet 113, and then discharged outdoors through the air outlet of the volute 123 and the exhaust duct. It is understood that, in order to avoid backflow, a check valve 16 may be installed between the air outlet of the volute 123 and the exhaust duct, so that the airflow can only be transmitted from the air outlet of the volute 123 towards the exhaust duct, and cannot be transmitted from the exhaust duct towards the volute 123.

[0036] Optionally, along the airflow direction, at least part of the diameter of the first air duct 131 can be gradually reduced to accelerate the airflow. The guiding effect is initiated by the adhesion effect of the airflow in the gradually narrowing air duct, so as to avoid the formation of airflow turbulence and vortex during the flow of oil fumes and reduce noise.

[0037] Furthermore, the first air duct 131 includes a first sub-air duct 1311 near the first smoke inlet 112. The diameter of the first sub-air duct 1311 gradually decreases along the airflow direction in the first direction p. That is, the first sub-air duct 1311 adopts a tapering air duct design in the first direction p, which can accelerate the airflow. The adhesion effect of the airflow in the tapering air duct initiates a guiding function, avoiding the formation of airflow turbulence and vortices during the flow of oil fumes, and reducing noise.

[0038] Furthermore, the first air duct 131 also includes a second sub-air duct 1312 connected to the first sub-air duct 1311. The second sub-air duct 1312 is located close to the first air inlet 121, and the diameter of the second sub-air duct 1312 gradually decreases along the airflow direction in the second direction q. That is, the second sub-air duct 1312 adopts a tapering air duct design in the second direction q, which can accelerate the airflow. Through the adhesion effect of the airflow in the tapering air duct, a guiding function is initiated, avoiding the formation of airflow turbulence and vortices during the flow of oil fumes, and reducing noise.

[0039] It should be noted that the phrase "gradually decreases" in the context of the gradual decrease in the diameter of the sub-ducts (first sub-duct 1311, second sub-duct 1312) along the airflow direction can mean that the diameter of the sub-ducts gradually decreases in a linear manner along the airflow direction. This linear manner can be a straight line, a parabola, etc., making the tapering design of the sub-ducts smoother and the airflow more efficient.

[0040] Optionally, the second direction q intersects with the first direction p to achieve a gradually narrowing air duct design in multiple directions, thereby improving the fume guiding effect. The intersection of the second direction q and the first direction p is defined as follows: the angle between the second direction q and the first direction p in the same plane is greater than 0° and less than 180°; for example, the angle can be 30°, 60°, 90°, 120°, etc., and this embodiment does not limit this.

[0041] Optionally, the first flow guiding assembly 13 includes a first flow guiding plate 132, a second flow guiding plate 133, and two spaced-apart third flow guiding plates 134. One end of the first flow guiding plate 132 is located on the side where the first air inlet 121 of the fan assembly 12 is located and is connected to the fan assembly 12. The other end extends towards the first smoke inlet 112 and is connected to the outer casing 11. The first flow guiding plate 132 connects the first air inlet 121 of the fan assembly 12 and the first smoke inlet 112 of the casing, which can better guide the fumes from the first smoke inlet 112 to the first air inlet 121, preventing the fumes from escaping to other parts of the first receiving cavity 111. It should be noted that the first flow guiding plate 132 can be connected to the fan assembly 12 to form the first end plate of the first air inlet 121, or it can be connected to the peripheral side plate of the fan assembly 12 that is connected to the first end plate. This embodiment of the application does not limit this.

[0042] Optionally, the second guide plate 133 is disposed on the side of the first guide plate 132 away from the fan assembly 12 and close to the first smoke inlet 112. The second guide plate 133 and the first guide plate 132 are respectively disposed on opposite sides of the first smoke inlet 112. A first sub-air duct 1311 is formed between the second guide plate 133, the first guide plate 132, and the inner wall surface of the outer casing 11. Along the upward flow of air, the distance between the first guide plate 132 and the second guide plate 133 gradually decreases. At this time, the aforementioned first direction p is approximately along the distribution direction of the first guide plate 132 and the second guide plate 133 and approximately parallel to the opening end face of the first smoke inlet 112. The opening end face of the first smoke inlet 112 can be the plate surface of the bottom plate 114 on which the first smoke inlet 112 is disposed. The gradual reduction design of the first sub-air duct 1311 is achieved by adjusting the distance between the first guide plate 132 and the second guide plate 133 along the upward flow of air. The structure is simple and easy to manufacture.

[0043] Optionally, combinedFigures 4 to 6 Two third guide vanes 134 are located on the side of the first guide vane 132 away from the fan assembly 12 and away from the first smoke inlet 112. Both third guide vanes 134 are connected to the outer casing 11, and a second sub-duct 1312 is formed between the two third guide vanes 134 and the inner wall of the outer casing 11. Along the upward flow of air, the distance between two adjacent third guide vanes 134 gradually decreases. At this time, the aforementioned second direction q is approximately the distribution direction of the two third guide vanes 134, and this second direction q can be approximately perpendicular to the central axis of the first air inlet 121. The gradual reduction design of the second sub-duct 1312 is achieved by adjusting the distance between the two third guide vanes 134 along the upward flow of air, resulting in a simple structure and convenient manufacturing.

[0044] It should be noted that the tapering design of the first sub-air duct 1311 can also be achieved by adjusting the distance between the two opposing inner wall surfaces forming the first sub-air duct 1311 in the outer casing 11, and the tapering design of the second sub-air duct 1312 can also be achieved by adjusting the distance between the two opposing inner wall surfaces forming the second sub-air duct 1312 in the outer casing 11. This application embodiment does not limit this.

[0045] Optionally, combined Figure 7 and Figure 8 The first guide plate 132 includes a first sub-guide plate 1321 and a second sub-guide plate 1322. The first sub-guide plate 1321 is attached to the side where the first air inlet 121 of the fan assembly 12 is located. A second sub-air duct 1312 is formed between the first sub-guide plate 1321, the two third guide plates 134, and the inner wall of the outer casing 11. Attaching the first sub-guide plate 1321 to the fan assembly 12 increases the connection area between the first guide plate 132 and the fan assembly 12, improving the connection stability between the first guide plate 132 and the fan assembly 12. The second sub-guide plate 1322 is angled to and connected to the first sub-guide plate 1321. The second sub-guide plate 1322 is located between the first sub-guide plate 1321 and the first smoke inlet 112. A first sub-air duct 1311 is formed between the second sub-guide plate 1322, the second guide plate 133, and the inner wall of the outer casing 11. The bending design of the second sub-guide plate 1322 and the first sub-guide plate 1321 can improve the space utilization rate within the first receiving cavity 111, increase the inlet area of ​​the first sub-air duct 1311, and enhance the smoke extraction effect of the first smoke inlet 112. The second sub-guide plate 1322 and the first sub-guide plate 1321 can be smoothly connected to ensure smooth airflow.

[0046] Optionally, the tilt angle between the second sub-guide plate 1322 and the second guide plate 133 can satisfy the following: the distance from the end of the second guide plate 133 near the first smoke inlet 112 to the second sub-guide plate 1322 is L1, and the distance from the end of the second sub-guide plate 1322 near the first sub-guide plate 1321 to the second guide plate 133 is L2. The ratio of L2 / L1 is greater than or equal to 0.5 and less than or equal to 0.8, so that the first sub-air duct 1311 forms a suitable tapered air outlet, avoiding the problem of insufficient tilt or excessive tilt.

[0047] Optionally, a first sound-absorbing layer 135 may be connected to the second sub-guide plate 1322. The first sound-absorbing layer 135 may be disposed on the side of the second sub-guide plate 1322 opposite to the second guide plate 133. That is, the first sound-absorbing layer 135 is disposed outside the first sub-air duct 1311, which can reduce noise while avoiding interference with the airflow within the first sub-air duct 1311.

[0048] Optionally, combined Figure 7 and Figure 9 A second sound-absorbing layer 136 is connected to the second guide plate 133, and the second sound-absorbing layer 136 is located on the side of the second guide plate 133 away from the first guide plate 132. That is, the second sound-absorbing layer 136 is located outside the first sub-air duct 1311, so as to avoid interfering with the airflow within the first sub-air duct 1311 while reducing noise.

[0049] Optionally, combined Figure 7 and Figure 10 A third sound-absorbing layer 137 is connected to the two third guide plates 134. The third sound-absorbing layer 137 may include a first sub-sound-absorbing layer 1371 respectively disposed on two opposite surfaces of the two third guide plates 134, and a second sub-sound-absorbing layer 1372 connecting the two first sub-sound-absorbing layers 1371, so as to increase the setting area of ​​the third sound-absorbing layer 137, improve the sound absorption effect, and better reduce noise.

[0050] Figure 11 This is a schematic diagram showing the noise radiation of the range hood 10 during use. Figure 12 for Figure 4 The diagram shown is a schematic representation of the noise radiation from a cross-sectional view of the range hood 10 at point AA. Figure 11 and Figure 12 It can be seen that the direction of noise transmission or radiation is opposite to the direction of airflow. The guide plate can cause noise to be reflected multiple times, reducing sound energy and achieving a sound insulation effect. Furthermore, the arrangement of the first sound-absorbing layer 135, the second sound-absorbing layer 136, and the third sound-absorbing layer 137 can effectively absorb the noise generated inside the outer shell 11, achieving a better noise reduction effect. The guide plate can have multiple mesh openings at the positions corresponding to the sound-absorbing layers.

[0051] In this embodiment, the first sound-absorbing layer 135, the second sound-absorbing layer 136, and the third sound-absorbing layer 137 can all be made of any noise-reducing material; for example, sound-absorbing cotton can be used, and this embodiment does not limit this. The first sound-absorbing layer 135 and the first guide plate 132, the second sound-absorbing layer 136 and the second guide plate 133, and the third sound-absorbing layer 137 and the third guide plate 134 can all be connected by any connection method; for example, adhesive bonding can be used, and this embodiment does not limit this.

[0052] Specifically, the outer casing 11 includes a base plate 114 and a first side plate 115. The base plate 114 is positioned facing the stove surface when the range hood 10 is in use, and a first smoke inlet 112 is formed on the base plate 114. The first side plate 115 is connected to the base plate 114 and is set at an angle to the base plate 114, and a second smoke inlet 113 is formed on the first side plate 115. When the range hood 10 is in use, the first smoke inlet 112 can face the stove surface, which can better absorb the oil fumes generated by the cookware on the stove surface. The second smoke inlet 113 installed on the first side plate 115 can absorb the oil fumes that the first smoke inlet 112 cannot absorb. The simultaneous use of the two can improve the oil fume absorption effect of the range hood 10.

[0053] Optionally, the first smoke inlet 112 includes two or more first sub-smoke inlets 1121 spaced apart, and the second smoke inlet 113 can be positioned between two adjacent first sub-smoke inlets 1121. The spaced-apart first sub-smoke inlets 1121 can correspond one-to-one with two or more cooktops on the cooktop surface, allowing more fumes generated on each cooktop to be drawn into the range hood 10 through the corresponding first sub-smoke inlet 1121, while fumes located between two cooktops can be drawn into the range hood 10 through the second smoke inlet 113. This ensures optimal fume absorption performance at each cooktop while maximizing the absorption of more fumes.

[0054] Further optionally, along the third direction t, the second smoke inlet 113 overlaps with at least one first sub-smoke inlet 1121, and two or more first sub-smoke inlets 1121 are distributed along the third direction t. By designing the second smoke inlet 113 to overlap with at least one first sub-smoke inlet 1121, the second smoke inlet 113 can also absorb the fumes corresponding to the first sub-smoke inlet 1121 that have not been drawn in by the first sub-smoke inlet 1121, thus enhancing the fume absorption effect of the range hood 10. Preferably, along the third direction t, the second smoke inlet 113 overlaps with both first sub-smoke inlets 1121 to reduce fume escape.

[0055] Alternatively, along the third direction t, the length of the region overlapping with at least one first sub-smooth smoke outlet 1121 along the entire length of the second smoke outlet 113 is 30%-50% of the length of the first sub-smooth smoke outlet 1121. By reasonably limiting the dimensions of the second smoke outlet 113 and the first sub-smooth smoke outlet 1121 along the third direction t, the second smoke outlet 113 can absorb more of the fumes that the first sub-smooth smoke outlet 1121 fails to inhale, while ensuring that the opening size of the second smoke outlet 113 is not too large, thus achieving both high structural strength and strong smoke extraction performance. In this embodiment, the third direction t is parallel to the second direction q.

[0056] It should be noted that both the first sub-smoke opening 1121 and the second smoke opening 113 can be approximately rectangular in shape, and the third direction t can be the direction of the long side of the first sub-smoke opening 1121. The long side of the first sub-smoke opening 1121 can be approximately parallel to the long side of the second smoke opening 113. The first sub-smoke opening 1121 and / or the second smoke opening 113 can also be approximately rhomboid or other structures, which is not limited in this embodiment.

[0057] Optionally, mesh panels can be installed at both the first smoke inlet 112 and the second smoke inlet 113. These mesh panels have perforations, allowing cooking fumes to be drawn into the range hood 10 through these perforations. The size of the perforations is significantly smaller than that of the first smoke inlet 112 and the second smoke inlet 113, preventing safety hazards caused by hands reaching in and preventing large obstacles from affecting the normal operation of the range hood 10. The mesh panels at the first smoke inlet 112 and / or the second smoke inlet 113 can be detachably connected to the outer casing 11 to facilitate internal maintenance and cleaning.

[0058] Optionally, in addition to the first side plate 115, the outer casing 11 may also include multiple second side plates 116. The multiple second side plates 116 are sequentially connected to the first side plate 115 to form a ring structure. The bottom plate 114 is disposed within the ring structure, such that when the range hood 10 is in use, the multiple second side plates 116 form a smoke-collecting chamber 117 on the side of the bottom plate 114 closest to the cooktop surface. The smoke-collecting chamber 117 can collect the fumes generated during the use of the cookware, allowing the collected fumes to more easily enter the first receiving cavity 111 of the outer casing 11 through the first smoke inlet 112 on the bottom plate 114. Optionally, the side of each second side plate 116 facing the cooktop surface when the range hood 10 is in use can be flush, thereby improving the structural regularity and aesthetics of the range hood 10.

[0059] Optionally, when the range hood 10 is in use, the distance between the base plate 114 and the cooktop surface gradually decreases along the direction from the end near the first side plate 115 to the end away from the first side plate 115. This facilitates the entry of cooking fumes into the range hood 10 through the first smoke inlet 112 on the base plate 114; and also facilitates the arrival of cooking fumes that are not drawn in through the first smoke inlet 112 at the second smoke inlet 113 on the first side plate 115, thereby improving the fume absorption effect. Optionally, the angle between the base plate 114 and the cooktop surface can be greater than or equal to 13° and less than or equal to 45°, so as to better facilitate the entry of cooking fumes into the first smoke inlet 112 on the base plate 114 and the second smoke inlet 113 on the first side plate 115.

[0060] Optionally, when the range hood 10 is in use, the side of each second side plate 116 facing the stove surface can be located between the side of the first side plate 115 facing the stove surface and the stove surface. One end of the bottom plate 114 can be connected to the side of the first side plate 115 facing the stove surface, and the other end of the bottom plate 114 can be connected to one of the multiple second side plates 116 opposite to the first side plate 115 and located in the smoke collection chamber 117. The range hood 10 may also include an oil cup 17, which is located within the smoke collection chamber 117. The oil cup 17 is situated on the side of the base plate 114 closest to the cooktop surface and near one of the multiple second side plates 116 opposite to the first side plate 115. The oil cup 17 communicates with the first receiving cavity 111, allowing the fumes within the range hood 10 to converge between the base plate 114 and the second side plate 116 opposite to the first side plate 115, and be collected by the oil cup 17 there for unified processing. Positioning the oil cup 17 within the smoke collection chamber 117 provides better concealment and improves the neatness and aesthetics of the range hood.

[0061] Optionally, one of the multiple second side plates 116 opposite to the first side plate 115 can be inclined to the second guide plate 133. Specifically, one end of the second guide plate 133 connected to the base plate 114 is positioned near the edge of the first smoke inlet 112, and the other end of the second guide plate 133 can extend inclinedly towards and connect to the second side plate 116 opposite to the first side plate 115, making the flow of fumes smoother. Optionally, the second side plate 116 opposite to the first side plate 115 can be connected to two third guide plates 134, and the first air inlet 121 of the fan assembly 12 can be positioned towards this second side plate 116.

[0062] Optionally, the second air inlet 122 and the first air inlet 121 can be respectively located on opposite sides of the fan assembly 12, so that the first air duct 131 and the second air duct 141 can be separated to a greater extent, reducing interference between them. Specifically, the first air inlet 121 can be positioned towards the first side plate 115, and the second air inlet 122 can be positioned towards a second side plate 116 opposite to the first side plate 115. More specifically, the first air inlet 121 and the second air inlet 122 can be respectively located on opposite sides of the volute 123 of the fan assembly 12.

[0063] Optionally, the suction performance of the first air inlet 121 can be higher than that of the second air inlet 122. Since the first smoke inlet 112, which is connected to the first air inlet 121 via the first air duct 131, is located on the bottom plate 114, and the second smoke inlet 113, which is connected to the second air inlet 122 via the second air duct 141, is located on the first side plate 115, the suction performance of the first air inlet 121 is higher than that of the second air inlet 122. This allows the first smoke inlet 112 on the bottom plate 114 to absorb more oil fumes than the second smoke inlet 113 on the first side plate 115, thus better removing oil fumes from the kitchen. Specifically, the middle plate of the impeller 124 located inside the volute 123 can be positioned close to the second air inlet 122 to achieve a suction performance at the second air inlet 122 that is lower than that at the first air inlet.

[0064] Optionally, the second flow guiding assembly 14 may include a fourth flow guiding plate 142. One end of the fourth flow guiding plate 142 may be connected to the side where the second air inlet 122 of the fan assembly 12 is located, and the other end may extend towards the second smoke inlet 113 and connect to the outer casing 11. The fourth flow guiding plate 142 is connected between the second air inlet 122 of the fan assembly 12 and the second smoke inlet 113 of the outer casing 11, which can better guide the fumes from the second smoke inlet 113 to the second air inlet 122, preventing the fumes from escaping to other parts of the first receiving cavity 111. It should be noted that the fourth flow guiding plate 142 may be connected to the fan assembly 12 to form the second end plate of the second air inlet 122, or it may be connected to the peripheral side plate of the fan assembly 12 that connects to the second end plate. This embodiment of the application does not limit this.

[0065] Optionally, the end of the fourth guide plate 142 near the second smoke inlet 113 can be connected to the end of the first guide plate 132 near the first smoke inlet 112, so that a noise reduction cavity 143 is formed between the fourth guide plate 142 and the first guide plate 132. Applying the Helmholtz principle, the noise generated by the fan assembly 12 during use can be reduced through the noise reduction cavity 143, thereby improving the performance of the range hood 10. Specifically, the noise radiated from the fan assembly can be reflected multiple times on the first guide plate 132 and the fourth guide plate 142, thus reducing noise.

[0066] Optionally, a fourth sound-absorbing layer 145 may be provided on one side of the fourth guide plate 142 forming the noise reduction cavity 143, and the first sound-absorbing layer 135 on the first guide plate 132 may also be provided on one side of the first guide plate 132 forming the noise reduction cavity 143, so that the first sound-absorbing layer 135 and the fourth sound-absorbing layer 145 can absorb noise in the air duct on the one hand, and absorb noise radiated from the fan assembly on the other hand, thereby improving the utilization rate of the sound-absorbing layer and improving the noise reduction performance while reducing the consumption of sound-absorbing layer materials.

[0067] Optionally, the second airflow guiding assembly 14 may further include a fifth airflow guiding plate 144, which is disposed on the side of the fourth airflow guiding plate 142 away from the fan assembly 12. A third sub-air duct 1411 communicating with the first air inlet 121 is formed between the fifth airflow guiding plate 144 and the fourth airflow guiding plate 142, and a fourth sub-air duct 1412 communicating with the second smoke inlet 113 is formed between the first side plate 115 and the fourth airflow guiding plate 142. The second air duct 141 includes the third sub-air duct 1411 and the fourth sub-air duct 1412. The diameter of the third sub-air duct 1411 is smaller than the diameter of the fourth sub-air duct 1412, so that the fumes can be better guided into the second air inlet 122 of the fan assembly 12.

[0068] Optionally, combined Figure 4 , Figure 5 and Figure 14 The fourth guide plate 142 includes a third sub-guide plate 1421 and a fourth sub-guide plate 1422. The third sub-guide plate 1421 is attached to the side of the fan assembly 12 where the second air inlet 122 is located, to increase the connection area between the fourth guide plate 142 and the fan assembly 12 and improve the connection stability between the fourth guide plate 142 and the fan assembly 12. The fourth sub-guide plate 1422 is set at an angle to the third sub-guide plate 1421 and connected. The fourth sub-guide plate 1422 is located between the third sub-guide plate 1421 and the second smoke inlet 113. The bending design of the fourth sub-guide plate 1422 and the third sub-guide plate 1421 can improve the space utilization rate in the first receiving cavity 111, increase the inlet area of ​​the second air duct 141, and enhance the smoke extraction effect at the second smoke inlet 113. The fourth sub-guide plate 1422 and the third sub-guide plate 1421 can be smoothly connected to ensure smooth airflow.

[0069] Combination Figure 7The included angle θ between the third sub-guide plate 1421 and the fourth sub-guide plate 1422 can be greater than or equal to 110° and less than or equal to 165°, so that the second air duct 141 forms a suitable tapering air outlet, avoiding the problem of insufficient tilt or excessive tilt. Optionally, the included angle between the end face of the fourth sub-guide plate 1422 and the end face of the fan assembly 12 forming the second air inlet 122 can be greater than or equal to 110° and less than or equal to 165°, so that the second air duct 141 forms a suitable tapering air outlet, avoiding the problem of insufficient tilt or excessive tilt.

[0070] Optionally, along the airflow direction, at least part of the diameter of the second air duct 141 can be gradually reduced to accelerate the airflow. The guiding effect is initiated by the adhesion effect of the airflow in the gradually narrowing air duct, so as to avoid the formation of airflow turbulence and vortex during the flow of oil fumes and reduce noise.

[0071] Optionally, combined Figure 2 and Figure 3 The range hood 10 also includes an opening and closing assembly 15, which is configured to correspond to the second smoke inlet 113 and connected to the outer casing 11. The opening and closing assembly 15 has a first position and a second position, which, in conjunction with... Figure 2 The first position lower opening and closing component 15 closes the second smoke outlet 113, combined with Figure 3 In the second position, the opening and closing component 15 opens the second smoke inlet 113. Thus, when there is a lot of oil smoke, the opening and closing component 15 can be in the second position, allowing the oil smoke to be drawn into the range hood 10 through both the first smoke inlet 112 and the second smoke inlet 113, accelerating the oil smoke absorption speed; while when there is less oil smoke, the opening and closing component 15 can be in the first position, allowing the oil smoke to be drawn into the range hood 10 only through the first smoke inlet 112, reducing the power consumption of the range hood 10 during use.

[0072] Optionally, the opening / closing assembly 15 and the housing 11 can be rotatably connected, allowing the opening / closing assembly 15 to rotate relative to the housing 11 to switch between a first position and a second position. The rotation axis of the opening / closing assembly 15 relative to the housing 11 is located on the side of the second smoke inlet 113 away from the first smoke inlet 112.

[0073] Optionally, the opening and closing assembly 15 may include a first cover plate 151 corresponding to the first side plate 115. When the opening and closing assembly 15 is in the first position, the first cover plate 151 covers the first side plate 115 and is approximately in contact with the first side plate 115. When the opening and closing assembly 15 is in the second position, the first cover plate 151 is set at an angle to the first side plate 115, so that the second smoke inlet 113 on the first side plate 115 is opened, and the first cover plate 151 can play a smoke-gathering effect.

[0074] Optionally, the opening and closing assembly 15 may further include a second cover plate 152 and a third cover plate 153. The second cover plate 152 and the third cover plate 153 may be respectively disposed on the second side plates 116 located on both sides of the first side plate 115, and both the second cover plate 152 and the third cover plate 153 are connected to the first cover plate 151. When the opening and closing assembly 15 is in the first position, the second cover plate 152 and the third cover plate 153 may respectively fit against the second side plates 116 on both sides of the first side plate 115. When the opening and closing assembly 15 is in the second position, the second cover plate 152 and the third cover plate 153 may cover the gap between the first cover plate 151 and the first side plate 115.

[0075] Combination Figure 12 The range hood 10 of this application has an outer casing 11 that may include a main casing 118 and a smoke collection chamber casing 119. When the range hood 10 is in use, the main casing 118 is located on the side of the smoke collection chamber casing 119 away from the stove surface. The main casing 118 can accommodate the fan assembly 12. The smoke collection chamber casing 119 may have a first smoke inlet 112 and a second smoke inlet 113. The ratio of the length L3 of the main casing 118 to the length L4 of the inner cavity of the smoke collection chamber casing 119, L3 / L4, can be greater than or equal to 0.4 and less than or equal to 0.7, so that the noise of the fan assembly 12 is lower and the whole machine is easier to install. Preferably, the length L3 of the main housing 118 of the range hood, the length L4 of the inner cavity of the smoke collection chamber housing 119, and the distance H between the end of the third guide plate 134 near the stove surface and the top of the inner cavity of the smoke collection chamber housing 119 can satisfy: 40°≤arctan((L1-L2) / 2 / H)≤75°.

[0076] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0077] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A range hood characterized by, The utility model relates to a smoke exhaust device, comprising: a housing formed with a receiving cavity and a first smoke suction port and a second smoke suction port in communication with the receiving cavity; the housing comprises a bottom plate, a first side plate and a plurality of second side plates, the bottom plate is arranged to face a cooking plane during use of the smoke exhaust device, and the bottom plate is formed with the first smoke suction port; the first side plate is connected to the bottom plate and arranged at an angle with the bottom plate, and the first side plate is formed with the second smoke suction port; the plurality of second side plates are sequentially connected to the first side plate to form a ring structure, and the bottom plate is arranged in the ring structure, so that the plurality of second side plates form a smoke collection cavity on a side of the bottom plate close to the cooking plane during use of the smoke exhaust device; a fan assembly arranged in the receiving cavity and formed with a first air inlet and a second air inlet arranged at a distance from the first air inlet; a first flow guide assembly arranged in the receiving cavity and forming a first air duct between an inner wall surface of the housing; the first air duct is in communication with the first smoke suction port and the first air inlet; a second flow guide assembly arranged in the receiving cavity and forming a second air duct between an inner wall surface of the housing; the second air duct is in communication with the second smoke suction port and the second air inlet, and the second air duct is independent of the first air duct; an opening and closing assembly comprising a first cover plate, a second cover plate connected to the first cover plate and a third cover plate; the first cover plate is arranged corresponding to the first side plate, and the second cover plate and the third cover plate are arranged corresponding to the second side plates on both sides of the first side plate respectively; wherein the opening and closing assembly has a first position and a second position; in the first position, the opening and closing assembly closes the second smoke suction port, and the first cover plate, the second cover plate and the third cover plate are respectively attached to the second side plates on both sides of the first side plate; in the second position, the opening and closing assembly opens the second smoke suction port, and the first cover plate is arranged at an angle with the first side plate, and the second cover plate and the third cover plate shield the gap between the first cover plate and the first side plate.

2. The range hood according to claim 1, characterized in that At least part of the first air duct gradually decreases in diameter along the airflow direction.

3. The range hood according to claim 2, characterized in that The first air duct comprises: a first sub-air duct in communication with the first smoke suction port; the first sub-air duct gradually decreases in diameter along the airflow direction in a first direction; a second sub-air duct in communication with the first sub-air duct and the first air inlet; the second sub-air duct gradually decreases in diameter along the airflow direction in a second direction intersecting the first direction.

4. The range hood according to claim 3, wherein The first flow guide assembly comprises: a first flow guide plate arranged at one end on a side of the first air inlet of the fan assembly and connected to the fan assembly, and extended towards a direction close to the first smoke suction port at the other end and connected to the housing; A second baffle plate is arranged on the side of the first baffle plate away from the fan assembly and close to the first smoke inlet. The second baffle plate and the first baffle plate are arranged on opposite sides of the first smoke inlet, respectively. The second baffle plate, the first baffle plate and the inner wall of the shell form the first sub-air duct. The distance between the first baffle plate and the second baffle plate gradually decreases along the airflow direction. Two third baffle plates are arranged on the side of the first baffle plate away from the fan assembly and away from the first smoke inlet. The two third baffle plates are connected to the shell. The second sub-air duct is formed between the two third baffle plates and the inner wall of the shell. The distance between the two third baffle plates gradually decreases along the airflow direction.

5. The range hood according to claim 4, wherein The first baffle plate comprises: A first sub-baffle plate is arranged on the side of the fan assembly where the first air inlet is located. The first sub-baffle plate, the two third baffle plates and the inner wall of the shell form the second sub-air duct. A second sub-baffle plate is arranged at an angle with the first sub-baffle plate and is connected to the first sub-baffle plate. The second sub-baffle plate is arranged between the first sub-baffle plate and the first smoke inlet. The second sub-baffle plate, the second baffle plate and the inner wall of the shell form the first sub-air duct.

6. The range hood according to claim 5, wherein A first sound-absorbing layer is connected to the second sub-baffle plate. The first sound-absorbing layer is arranged on the side of the second sub-baffle plate away from the second baffle plate.

7. The range hood according to claim 4, wherein A second sound-absorbing layer is connected to the second baffle plate. The second sound-absorbing layer is arranged on the side of the second baffle plate away from the first baffle plate; and / or A third sound-absorbing layer is connected to the two third baffle plates. The third sound-absorbing layer comprises a first sub-sound-absorbing layer arranged on each of the two opposite surfaces of the two third baffle plates and a second sub-sound-absorbing layer connected between the two first sub-sound-absorbing layers.

8. The range hood according to claim 1, characterized in that The diameter of at least part of the second air duct gradually decreases along the airflow direction.

9. The range hood according to claim 1, characterized in that The first air inlet and the second air inlet are arranged on opposite sides of the fan assembly. The first baffle assembly comprises a first baffle plate. One end of the first baffle plate is arranged on the side of the fan assembly where the first air inlet is located and is connected to the fan assembly. The second baffle assembly comprises a fourth baffle plate. One end of the fourth baffle plate is arranged on the side of the fan assembly where the second air inlet is located and is connected to the fan assembly. The other end of the fourth baffle plate is connected to the other end of the first baffle plate, so that the first baffle plate, the fourth baffle plate, the fan assembly and the inner wall of the shell form a noise reduction cavity.

10. The range hood according to claim 9, characterized in that The first baffle plate connected to one side of the noise reduction cavity has a first sound-absorbing layer, and / or the fourth baffle plate connected to one side of the noise reduction cavity has a fourth sound-absorbing layer.

11. The range hood according to claim 1, characterized in that The air suction performance of the first air inlet is higher than that of the second air inlet.

12. The range hood according to claim 11, characterized in that The first smoke inlet comprises two or more first sub-smoke inlets arranged at intervals. The second smoke inlet is arranged between adjacent two first sub-smoke inlets.

13. The hood as claimed in claim 12 wherein, Along a third direction, the second smoking port has an overlapping area with at least one of the first sub-smoking ports, and two or more of the first sub-smoking ports are distributed along the third direction.

14. The range hood according to claim 13, characterized in that Along the third direction, a length dimension of the overlapping area between the second smoking port and at least one of the first sub-smoking ports is 30%-50% of a length dimension of the first sub-smoking port.

15. The hood as claimed in claim 11, wherein, The distance between the bottom plate and the cooking platform gradually decreases from an end close to the first side plate to an end away from the first side plate when the range hood is in use.

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