Range hood

Abstract

The invention discloses a range hood which comprises a smoke collecting box, a smoke outlet, a smoke outlet, a smoke outlet and a smoke outlet pipe, wherein a middle smoke inlet is formed in the front side of the smoke collecting box; the fan is arranged in the smoke collecting box; an upper smoke inlet located above the middle smoke inlet and a lower smoke inlet located below the middle smoke inlet are further formed in the front side of the smoke collecting box. The draught fan is a double-air-inlet draught fan and comprises a first air inlet facing the front side and a second air inlet facing the rear side, the upper smoke inlet and the middle smoke inlet are in fluid communication with the first air inlet, and the lower smoke inlet is in fluid communication with the second air inlet.

Description

Technical Field

[0001] This invention relates to an oil fume purification device, and more particularly to an oil fume extractor. Background Technology

[0002] As an essential kitchen appliance in every household, the range hood works by using a high-speed rotating impeller in the casing to draw in cooking fumes from the air inlet, filter the fumes using the impeller, and then expel the filtered fumes from the air outlet, thus purifying the kitchen air.

[0003] Traditional side-draft downdraft range hoods have a central air intake and a baffle plate in the middle to increase the negative pressure zone, allowing cooking fumes to be captured and drawn into the hood, as disclosed in Chinese Patent Application No. 202420454988.8. However, with the baffle plate open, this type of range hood obstructs the cook's view, posing a risk of accidentally hitting the pan during cooking. Furthermore, the exposed fan system results in poor noise levels, and the motor-driven baffle mechanism is costly.

[0004] Without a smoke baffle, as disclosed in Chinese Patent Application No. 202411104868.6, a side-suction range hood utilizes the Coanda effect, where cooking fumes rise along the Coanda plate and enter the range hood. However, without proper airflow distribution, the lower airflow distribution is unreasonable. When the fumes rise rapidly, they do not follow the intended Coanda effect to rise along the inclined panel and enter the upper air inlet. This results in fumes hitting the user's face, a poor user experience, and excessive noise.

[0005] Therefore, further improvements are needed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a range hood with a smoke collection hood that has a smoke-gathering function, improves the smoke extraction effect, and reduces smoke escape.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a range hood, comprising: The smoke collection box has a central smoke inlet formed on its front side; and The fan is installed inside the smoke collection box; Its features are: The front side of the smoke collection box also has an upper smoke inlet located above the middle smoke inlet and a lower smoke inlet located below the middle smoke inlet; The fan is a dual-inlet fan, which includes a first air inlet facing the front and a second air inlet facing the rear. The upper smoke inlet and the middle smoke inlet are respectively in fluid communication with the first air inlet, and the lower smoke inlet is in fluid communication with the second air inlet.

[0008] By setting up the above-mentioned upper, middle, and lower smoke inlets, as well as dual air intake fans, the space of the side-suction range hood is fully utilized. The front and rear air intakes of the fans are separated, and the negative pressure zones of the middle and lower smoke inlets are expanded outward. After the oil fumes rise, the lower and middle smoke inlets, which are located close to the source of the oil fumes, provide a tangential pull to the high-speed oil fume, causing the airflow to approach the front of the smoke collection box, reducing the rising speed of the oil fumes. Some of the oil fumes are sucked in through these two smoke inlets, while the remaining decelerated oil fumes move upward along the front and enter the upper smoke inlet, achieving the effect of pulling down and sucking up the oil fumes.

[0009] Furthermore, the smoke collection box includes a diverter plate, which corresponds to the area between the upper smoke inlet and the middle smoke inlet.

[0010] By setting up a flow divider, the flow rates of the upper and middle flue gas inlets can be diverted, thus preventing the airflow from the two inlets from colliding and causing turbulence and vortices.

[0011] Preferably, the diverter has two segments spaced apart along the width of the range hood, and the two segments are arranged in a figure-eight shape. This guides the airflow towards the central position corresponding to the fan inlet, thus promoting the fan's intake of cooking fumes.

[0012] Preferably, in order to reasonably guide the flow of oily fumes towards the center, the angle between the diverter and the horizontal plane is α, and the value of α ranges from 15° to 45°.

[0013] Furthermore, to facilitate the formation of three smoke inlets, the smoke collection box includes a box body with an open front side and a panel assembly disposed at the open front side of the box body. There is a gap between the upper edge of the panel assembly and the top of the front side of the box body, thereby forming the upper smoke inlet. The middle smoke inlet and the lower smoke inlet are formed on the panel assembly.

[0014] Furthermore, the panel assembly includes a panel and a panel support. The panel support is disposed on the side of the panel facing the housing. The panel has a first opening. The panel support includes a first part above the first opening and a second part below the first part. The second part is tilted backward relative to the panel at a position corresponding to the first opening and has an opening, thereby forming a middle smoke inlet. The gap between the part of the panel below the lower edge of the first opening and the second part forms the lower smoke inlet.

[0015] Furthermore, to isolate the lower smoke inlet from the first air inlet of the fan, the range hood also includes a diverter plate, which is disposed between the fan and the panel assembly. The diverter plate forms a third air inlet at a position corresponding to the first air inlet. The diverter plate is in contact with the portion of the fan located around the first air inlet. The diverter plate is also in contact with at least a portion of the rear surface of the second part of the panel bracket located below the middle smoke inlet, thereby sealing the fluid passage between the lower smoke inlet and the first air inlet.

[0016] Furthermore, in order to guide the oil on the panel support downwards along the portion below the first opening and avoid oil drift, the lower end of the second portion is inclined toward the panel. Thus, the panel support also includes a third portion below the second portion. Both the first portion and the third portion are in contact with the panel. The second portion forms a second opening at a position below the middle smoke inlet. The lower smoke inlet and the second opening are in fluid communication. The position where the diverter plate is in contact with the panel support is higher than the second opening.

[0017] To guide the oil flowing down from the upper part of the first opening downwards and to facilitate the integral fabrication of the middle smoke inlet with other parts of the panel bracket, the top of the second part of the panel bracket is bent from back to front to form a bent portion. The bent portion fits against the upper edge of the first opening, and the outer surface of the front end of the bent portion is a curved surface that convexes forward.

[0018] Furthermore, the panel forms rounded corners at the upper edge of the first opening and at the two corners located along the width direction of the range hood, so that the oil stains at the corners will flow down along the rounded corners, preventing oil from accumulating at the corners and dripping down onto the stove surface.

[0019] Preferably, the smoke inlet area of ​​the upper smoke inlet is 2 to 3 times or more the sum of the smoke inlet areas of the middle smoke inlet and the lower smoke inlet. The upper smoke inlet is the main smoke inlet, while the middle and lower smoke inlets can be set to be smaller, which can avoid the problem of loud noise in traditional center-mounted side-suction range hoods with air inlets in the middle.

[0020] Compared with the prior art, the advantages of the present invention are as follows: by setting the above-mentioned upper, middle and lower smoke inlets and dual air intake fans, the space of the side-suction range hood is fully utilized, the front and rear air intakes of the fans are separated, the negative pressure zones of the middle and lower smoke inlets are expanded outward, and after the oil fumes rise, the lower smoke inlet and the middle smoke inlet set at the position close to the source of the oil fumes give a tangential pull to the high-speed oil fume, so that the airflow is close to the front of the smoke collection box, reducing the rising speed of the oil fumes. Some of the oil fumes are sucked in at these two smoke inlets, and the remaining decelerated oil fumes move upward along the front and enter the upper smoke inlet, thus achieving the oil fume suction effect of pulling down and sucking up. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a range hood according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a range hood according to an embodiment of the present invention; Figure 3 for Figure 2 A magnified schematic diagram of part I; Figure 4 This is a cross-sectional side view (section and...) of the range hood according to an embodiment of the present invention. Figure 2 parallel); Figure 5 This is a schematic diagram of the hidden part of the smoke collection box of the range hood according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the panel assembly of the smoke collection box of a range hood according to an embodiment of the present invention; Figure 7 for Figure 6 A magnified schematic diagram of part II; Figure 8 This is a schematic diagram of the hidden panel assembly of a range hood according to an embodiment of the present invention. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0024] See Figures 1-8 A range hood, specifically a side-suction range hood, includes a smoke collection box 1 and a fan 2 disposed within the smoke collection box 1.

[0025] The smoke collection box 1 includes a box body 11 with an open front side and a panel assembly 12 disposed at the open front side of the box body 11. A gap exists between the upper edge of the panel assembly 12 and the top of the front side of the box body 11, thus forming an upper smoke inlet 13, which is the main smoke inlet. A filter plate 131 can be disposed on the rear side of the panel assembly 12 facing inwards from the box body 11. The filter plate 131 gradually slopes upwards from the rear side of the panel assembly 12, and its rear end can be fixed to the box body 11 by means of a plate or similar component. The fumes entering through the upper smoke inlet 13 are filtered by the filter plate 131 before entering the fan 2.

[0026] The panel assembly 12 includes a panel 121 and a panel bracket 122. The panel 121 is generally made of glass, making it easier to clean and maintain. The panel bracket 122 is located on the side of the panel 121 facing the inside of the housing 11. The panel 121 has a first opening 123, which can be elongated and extends along the width direction of the range hood (the width direction refers to the left and right direction when the user faces the range hood in its normal installation state, see [reference]). Figure 1 (As indicated by the middle arrow X). The lower edge of the first opening 123 is higher than the lower edge of the panel 121. The panel support 122 includes a first portion 1221 that abuts against the portion of the panel 121 located above the first opening 123, and a second portion 1222 located below the first portion 1221. The second portion 1222 is inclined rearward relative to the panel 121 and has an opening at a position corresponding to the first opening 123, thereby forming a central smoke inlet 124, which may be in the form of a grille. The portions of the panel support 122 located on both sides of the central smoke inlet 124 in the width direction are closed between the panel 121 and the panel 121.

[0027] The lower end of the second portion 1222 is below the lower edge of the first opening 123 on the panel 121 and is located behind the portion of the panel 121 below the first opening 123. Thus, the gap between the portion of the panel 121 below the lower edge of the first opening 123 and the second portion 1222 forms the lower smoke inlet 125. The lower end of the second portion 1222 of the panel support 122 can be tilted towards the panel 121, thereby forming a third portion 1223 below the second portion 1222, which can fit against the panel 121, maintaining the stability of the connection between the panel support 122 and the panel 121, and facilitating support of the panel 121. At this time, a second opening 1224 is formed below the middle smoke inlet 124 in the second portion 1222, and the lower smoke inlet 125 is in fluid communication with the second opening 1224.

[0028] The fan 2 is a dual-inlet fan, having a first air inlet 21 facing forward and a second air inlet 22 facing rearward. Fumes entering through the upper smoke inlet 13 and the middle smoke inlet 124 enter the fan 2 through the first air inlet 21, while fumes entering through the lower smoke inlet 125 enter the fan 2 through the second air inlet 22. For this purpose, the range hood also includes a diverter plate 3, which is disposed between the front of the fan 2 and the panel assembly 12, and forms a third air inlet 31 corresponding to the first air inlet 21. The diverter plate 3 is fitted to the portion of the fan 2 surrounding the first air inlet 21, ensuring that fumes can only enter the first air inlet 21 through the third air inlet 31 on the diverter plate 3. The diverter plate 3 can at least partially fit against the rear surface of the second part 1222 of the panel support 122 located between the middle smoke inlet 124 and the second opening 1224, thereby sealing the fluid passage between the second opening 1224 and the first air inlet 21, so that the fumes entering from the lower smoke inlet 125 can only flow to the rear second air inlet 22 through the second opening 1224.

[0029] A diverter plate 126 is also provided on the first portion 1221 of the panel bracket 122, and the diverter plate 126 is located on the side of the first portion 1221 facing the fan 2. In this embodiment, there are two diverter plates 126 arranged at intervals along the width direction of the range hood, and they are arranged in a figure-eight shape. The diverter plate 126 corresponds to the area between the upper smoke inlet 13 and the middle smoke inlet 124. The fumes entering from the upper smoke inlet 13 enter the first air inlet 21 from above the diverter plate 126, and the fumes entering from the middle smoke inlet 124 enter the first air inlet 21 from below the diverter plate 126. Thus, the diverter plate 126 can distribute the proportion of fumes entering from the upper smoke inlet 13 and fumes entering from the middle smoke inlet 124 entering the first air inlet 21 respectively.

[0030] By setting up the above-mentioned upper, middle, and lower smoke inlets and dual air intake fans 2, the space of the side-suction range hood is fully utilized, and the front airflow is reasonably distributed to the upper and middle smoke inlets. By setting up a diversion plate 3 to separate the front and rear air intakes of the fan 2, the turbulent airflow is avoided from causing vortexes. In actual tests, the noise was reduced by 2dB under the action of this diversion plate. In addition, by using the diversion plate, considering the position of the stove burner and the range hood, the size and position of the middle and lower smoke inlets (small smoke inlet) are set. The negative pressure zone of the middle and lower smoke inlets is expanded outward. After the oil fumes rise, the lower smoke inlet 125 and the middle smoke inlet 124, which are set close to the source of the oil fumes, give the high-speed oil fume a tangential pull, so that the airflow approaches the guide panel 121 or hits the panel 121, reducing the rising speed of the oil fumes. Some of the oil fumes are sucked in through these two smoke inlets, and the remaining decelerated oil fumes move upward along the panel 121 and enter the upper smoke inlet 13, achieving the oil fume suction effect of pulling down and sucking up. The three smoke inlets that enter the three air ducts inside the fan 2 are independent of each other, which makes it easier for each to play its own role.

[0031] Because the lower smoke inlet is relatively small and far from the impeller of the fan 2, it avoids the problem of loud noise from the middle-mounted side-suction range hood. In addition, a sound-absorbing component can be set at the corresponding position of the impeller center to further reduce noise and achieve a better noise experience.

[0032] The upper smoke inlet 13 serves as the main smoke inlet, and its smoke inlet area can be 2 to 3 times larger than the areas of the middle smoke inlet 124 and the lower smoke inlet 125. The smoke inlet area is based on the cross-sectional area of ​​each smoke inlet that initially contacts the oil fume. The angle between the diverter plate 126 and the horizontal plane is α, and the preferred value of α is in the range of 15° to 45°. The smoke intake from the upper smoke inlet 13 accounts for about 2 / 3, and the smoke intake from the middle smoke inlet 124 accounts for the remaining 1 / 3. The horizontal distance between the diverter plate 3 and the panel 121 gradually decreases from top to bottom, thereby increasing the wind speed of the middle smoke inlet 124 and the lower smoke inlet 125, expanding the negative pressure zone, and better capturing the oil fume.

[0033] The oil path of the range hood of the present invention is as follows: when the condensed oil on the upper side of the first opening 123 flows downward and smoke enters through the middle smoke inlet 13, condensed oil will form on the upper edge of the first opening 123. Since the panel support 122 is located on the rear side of the panel 121, the top of the second part 1222 of the panel support 122, that is, the position corresponding to the upper edge of the first opening 123 of the panel 121, is bent from back to front to form a bent part 1225, so that the bent part 1225 fits with the upper edge of the first opening 123. The outer surface of the front end of the bent part 1225 can be a forward-convex curved surface 1226. The integral pressing is achieved by the curved surface fitting, so that the oil flowing down the upper edge of the first opening 123 can be received by the bent part 1225 and then flow down along the second part 1222 into the housing 11. The design of the curved surface 1226 can prevent the oil from dripping directly downward after flowing to the front end of the bent part 1225. In existing technologies, the smoke inlet is usually constructed by separately bonding a back panel for oil guidance, which results in a poor appearance and often lacks the function of blocking foreign objects. The panel 121 has rounded corners 1231 at the upper edge of the first opening 123 and at the two corners along the width direction of the range hood. Oil stains at the corners will flow down along the rounded corners 1231, preventing oil from accumulating at the corners and dripping down onto the stove surface.

[0034] The oil stains on the second part 1222 of the panel bracket 122 are guided along the lower smoke inlet 125 on the panel bracket 122 to the lower side of the housing 11 and into the oil cup 4. In addition, the diverter plate 126 can guide the oil stains on the inner surface of the panel bracket 122 to both sides in the width direction of the range hood, avoiding the accumulation of oil stains in the middle smoke inlet 124 and the lower smoke inlet 125, and reducing the oil stains at the smoke inlet position.

[0035] The aforementioned fan 2 can be controlled by a voice module. A controller, a voice receiving module, and a voice parsing module can be installed on the range hood. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the fan 2 to perform corresponding operations, thereby realizing intelligent control of the range hood and improving the user experience.

[0036] The term "fluid connectivity" as used in this invention refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. This third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

Claims

1. A range hood, comprising: a hood (1) having a front side formed with a middle smoke inlet (124); and a fan (2) disposed in the hood (1); characterized in that: the front side of the hood (1) is further formed with an upper smoke inlet (13) above the middle smoke inlet (124) and a lower smoke inlet (125) below the middle smoke inlet (124); the fan (2) is a double-inlet fan, the fan (2) includes a first inlet (21) facing the front side and a second inlet (22) facing the back side, the upper smoke inlet (13) and the middle smoke inlet (124) are in fluid communication with the first inlet (21) respectively, and the lower smoke inlet (125) is in fluid communication with the second inlet (22).

2. The hood according to claim 1, characterized in that: the hood (1) includes a baffle (126) corresponding to the space between the upper smoke inlet (13) and the middle smoke inlet (124).

3. The hood according to claim 2, characterized in that: The baffle (126) has two baffle plates arranged in the width direction of the range hood, and the two baffle plates are arranged in a spreader shape.

4. The hood according to claim 3, characterized in that: The included angle between the baffle (126) and the horizontal plane is α, and the value of α is in the range of 15°-45°.

5. The hood according to claim 1, characterized in that: The hood (1) includes a front-opened box body (11) and a panel assembly (12) disposed at the front opening of the box body (11), the upper edge of the panel assembly (12) has a gap with the top of the front side of the box body (11), so that the gap constitutes the upper smoke inlet (13), and the middle smoke inlet (124) and the lower smoke inlet (125) are formed on the panel assembly (12).

6. The hood according to claim 5, characterized in that: The panel assembly (12) includes a panel (121) and a panel support (122), the panel support (122) is disposed on the side of the panel (121) facing the inside of the box body (11), the panel (121) is provided with a first opening (123), the panel support (122) includes a first part (1221) above the first opening (123) and a second part (1222) below the first part (1221), the second part (1222) is inclined backward and perforated at the position corresponding to the first opening (123) relative to the panel (121), thereby constituting the middle smoke inlet (124), and the gap between the part of the panel (121) below the lower edge of the first opening (123) and the second part (1222) constitutes the lower smoke inlet (125).

7. The hood according to claim 6, characterized in that: The range hood further comprises a baffle plate (3) disposed between the fan (2) and the panel assembly (12), the baffle plate (3) forms a third inlet (31) at the position corresponding to the first inlet (21), the baffle plate (3) is attached to the part of the fan (2) located at the periphery of the first inlet (21), and the baffle plate (3) is also at least partially attached to the part of the rear side surface of the second part (1222) of the panel support (122) below the middle smoke inlet (124), thereby closing the fluid passage between the lower smoke inlet (125) and the first inlet (21).

8. The hood according to claim 7, characterized in that: The lower end of the second portion (1222) is inclined towards the panel (121), whereby the panel support (122) further comprises a third portion (1223) below the second portion (1222), the first portion (1221) and the third portion (1223) are both attached to the panel (121), the second portion (1222) forms a second opening (1224) at a position below the middle smoke inlet (124), the lower smoke inlet (125) is in fluid communication with the second opening (1224), the position where the baffle (3) is attached to the panel support (122) is higher than the second opening (1224).

9. The hood according to claim 6, characterized in that: The top of the second portion (1222) of the panel support (122) is bent rearward to form a bent portion (1225), the bent portion (1225) is attached to the upper edge of the first opening (123), the front side end surface of the bent portion (1225) is a forwardly convex curved surface (1226).

10. The hood according to claim 6, characterized in that: The panel (121) forms a rounded corner (1231) at the upper edge of the first opening (123) and at both corners in the width direction of the range hood.

11. The hood according to any one of claims 1-10, characterized in that: The smoke inlet area of the upper smoke inlet (13) is more than 2-3 times the sum of the smoke inlet areas of the middle smoke inlet (124) and the lower smoke inlet (125).

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