Top-side double-suction type range hood

Abstract

The utility model relates to a top-side double-suction type range hood which can improve the overall oil smoke suction effect of the range hood and reduce oil smoke escape by optimizing the position and / or size of a top-side double-suction air inlet. The top-side double-suction type range hood comprises a fan box; the smoke collecting box comprises a vertical box body and a transverse box body; the vertical box body extends downwards from the rear part of the fan box; the transverse box body extends forwards from the upper part of the vertical box body; a side suction air inlet communicated with the fan box is formed in the lower part of the vertical box body; a top suction air inlet communicated with the fan box is formed in the bottom of the transverse box body; the vertical distance between the rear edge of the top suction air inlet and the lower edge of the side suction air inlet ranges from 200 mm to 450 mm, and the transverse distance between the front edge of the top suction air inlet and the upper edge of the side suction air inlet ranges from 50 mm to 350 mm.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range hood, in particular to a top and side double suction type range hood. BACKGROUND

[0002] With the improvement of people's living quality, the range hood gradually becomes an indispensable electrical appliance in the kitchen. It is usually installed above the kitchen stove and can suck the oil fume generated during cooking, thereby purifying the kitchen environment and improving the comfort of people during cooking. With the iteration of range hood technology, in recent years, there are many top and side double suction range hoods (7-shaped range hood) on the market. They basically have two air inlets arranged at the lower part and the top part. Although the side suction air inlet is mostly arranged on the vertical box, the position and size of the top suction air inlet are different, and the emphasis of the specific oil fume suction effect is also different: some mainly use the top air inlet, some mainly use the lower air inlet, and some simply use one air inlet, and the other air inlet has no effect.

[0003] In actual use, due to the unreasonable position and size of the air inlet of the top and side double suction range hood, the oil fume suction and exhaust efficiency is low, and the oil fume is easy to escape to other areas of the kitchen, affecting the air quality of the kitchen. In addition, the unreasonable flow distribution of the top suction air inlet and the side suction air inlet may also cause waste of air volume or insufficient suction, especially in the case of uneven distribution of oil fume during cooking, the traditional design of the top and side double suction range hood is difficult to effectively cope with. CONTENT OF THE UTILITY MODEL

[0004] In view of the problem that the existing top and side double suction range hood has low oil fume suction and exhaust efficiency due to the unreasonable position and size of the top and side double suction air inlet, the present application provides a top and side double suction range hood which can optimize the position and / or size of the top and side double suction air inlet, improve the overall oil fume suction effect of the range hood, and reduce the escape of oil fume.

[0005] The present application provides a top and side double suction range hood, comprising: a fan box; and a smoke collecting box comprising a vertical box extending downward from the rear of the fan box and a horizontal box extending forward from the upper part of the vertical box; a side suction air inlet is formed in the lower part of the vertical box and communicates with the fan box; a top suction air inlet is formed in the bottom of the horizontal box and communicates with the fan box; the vertical distance between the rear edge of the top suction air inlet and the lower edge of the side suction air inlet is between 200mm and 450mm, and the horizontal distance between the front edge of the top suction air inlet and the upper edge of the side suction air inlet is between 50mm and 350mm.

[0006] In an embodiment of the present application, the thickness of the vertical box at the upper edge of the side suction air inlet is between 50mm and 100mm.

[0007] In one embodiment of the present application, the transverse distance between the front edge of the top suction air inlet and the rear wall of the vertical cabinet is greater than or equal to 200 mm.

[0008] In one embodiment of the present application, the area ratio between the top suction air inlet and the side suction air inlet is between 1.2 and 1.5.

[0009] In one embodiment of the present application, the flow ratio between the top suction air inlet and the side suction air inlet is between 1.5 and 2.5; the air speed of the top suction air inlet is greater than 2 m / s, and the air speed of the side suction air inlet is greater than 1.8 m / s.

[0010] In one embodiment of the present application, the fan cabinet comprises a fan cabinet body fixedly connected with the smoke collecting cabinet and a fan main body arranged in the fan cabinet body; the fan main body is located at the front of the fan cabinet body to form an air inlet passage corresponding to the vertical cabinet at the rear of the fan cabinet body.

[0011] In one embodiment of the present application, the vertical cabinet comprises a rectangular frame with equal thicknesses from top to bottom and providing the side suction air inlet, and a flow guide plate body extending obliquely upward and rearward from the lower edge of the side suction air inlet; the transverse cabinet comprises a trapezoidal frame extending along the thickness of the bottom of the fan cabinet body and tapering from the upper part of the rectangular frame and providing the top suction air inlet.

[0012] In one embodiment of the present application, the vertical cabinet further comprises a side suction grille arranged in the rectangular frame and adjacent to the side suction air inlet; the side suction grille is arranged transversely in the rectangular frame and above the upper edge of the side suction air inlet; the transverse cabinet further comprises a top suction grille arranged in the trapezoidal frame and adjacent to the top suction air inlet.

[0013] In one embodiment of the present application, the transverse cabinet further comprises a top suction baffle reversibly arranged in the trapezoidal frame to open or close the top suction air inlet, and a top suction driving mechanism mounted in the trapezoidal frame to drive the top suction baffle; the vertical cabinet further comprises a side suction baffle slidably arranged in the rectangular frame to open or close the side suction air inlet, and a side suction driving mechanism mounted in the rectangular frame to drive the side suction baffle.

[0014] In one embodiment of the present application, the top and side double suction range hood further comprises an oil cup detachably arranged at the bottom of the vertical cabinet and communicating with the vertical cabinet; the thickness of the oil cup is greater than the thickness of the rectangular frame.

[0015] In summary, the top-side double-suction range hood of the present application can achieve the following beneficial effects: the rear edge of the top suction inlet of the existing top-side double-suction range hood is usually about 600 mm away from the height of the cooking bench when it is installed on the wall, so as to be in the oil fume diffusion zone and mainly capture the oil fume diffused upward during cooking; since the vertical distance between the rear edge of the top suction inlet and the lower edge of the side suction inlet of the top-side double-suction range hood of the present application is between 200 mm and 450 mm, the lower edge of the side suction inlet of the top-side double-suction range hood of the present application is less than 400 mm away from the height of the cooking bench, so as to be below the oil fume diffusion zone, facilitating the oil fume to be pulled backward in the oil fume rising zone or even the oil fume generating zone, so that the oil fume path in the oil fume diffusion zone is backward to the surface of the vertical cabinet and then rises, and further enters the top suction inlet, thereby achieving a complementary effect. Meanwhile, although the top suction inlet is located high to be in the oil fume diffusion zone, since the horizontal distance between the front edge of the top suction inlet and the upper edge of the side suction inlet of the top-side double-suction range hood of the present application is between 50 mm and 350 mm, the front edge of the top suction inlet of the top-side double-suction range hood of the present application is large enough away from the wall, which can ensure a sufficient fume gathering area and reduce the escape of oil fume, thereby improving the overall oil fume suction effect of the range hood.

[0016] In addition, the thickness W of the vertical cabinet of the top-side double-suction range hood of the present application at the upper edge of the side suction inlet is between 50 mm and 100 mm, so that the size of the upper edge of the side suction inlet away from the wall is moderate, neither too large to cause the pot to be hit, nor too small to affect the oil fume suction effect of the side suction inlet.

[0017] In addition, although the cross section of the oil fume increases during the rising process, the top-side double-suction range hood of the present application can make the side suction inlet located at the lower part of the vertical cabinet close to the cooking bench (i.e. closer to the oil fume), so as to capture the oil fume at the initial stage of the oil fume rising, and make the oil fume with a smaller cross section overall close to the wall side (i.e. close to the vertical cabinet), one third of which enters the range hood through the side suction inlet, and the remaining oil fume rises to the horizontal cabinet to be captured by the top suction inlet with a larger area at the later stage of the oil fume rising, thereby realizing the multi-point fume control effect of downward pulling and upward suction, obtaining a better oil fume suction effect, and avoiding the escape of oil fume. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a perspective view of a top-side double-suction range hood according to an embodiment of the present application;

[0019] Figure 2 FIG. 3 shows an application diagram of the top-side double-suction range hood according to the above embodiment of the present application;

[0020] Figure 3 Fig. 6 shows a schematic view of the top-side dual-suction range hood according to the above embodiment of the present application when the side suction inlet is opened;

[0021] Figure 4 Fig. 7 shows a schematic view of the top-side dual-suction range hood according to the above embodiment of the present application when the side suction inlet is closed.

[0022] Main element symbol explanation:

[0023] 10, fan box; 11, fan box body; 12, fan main body; 20, smoke collecting box; 21, vertical box body; 210, side suction inlet; 211, rectangular frame; 212, flow guide plate body; 213, side suction grille; 214, side suction baffle; 215, side suction driving mechanism; 22, horizontal box body; 220, top suction inlet; 221, trapezoidal frame; 222, top suction grille; 223, top suction baffle; 224, top suction driving mechanism; 30, oil cup.

[0024] The above main element symbol explanation further details the present application in combination with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0025] In order to make the above objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application are described in detail below in combination with the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In addition, the terms "first", "second", etc. are used only for descriptive purposes and do not connote or imply relative importance or an ordering between the indicated technical features. Thus, a feature defined with "first", "second" may include, explicitly or implicitly, at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0028] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0030] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0031] Considering that the position and size of the existing top-side double-suction range hood inlet are unreasonable, resulting in low oil fume suction and exhaust efficiency, and oil fume easily escaping to other areas of the kitchen, affecting the air quality of the kitchen. Therefore, the present application creatively provides a top-side double-suction range hood, which can optimize the position and / or size of the top-side double-suction inlet to improve the overall oil fume suction effect of the range hood and reduce oil fume escape.

[0032] Specifically, as Figures 1 to 4As shown, one embodiment of this application provides a top-side dual-suction range hood, which may include a fan box 10 and a smoke collection box 20 located below and communicating with the fan box 10. It is understood that the range hood of this application may also include, but is not limited to, a control board, a water tank, or a water collection box to assist in completing the smoke extraction function; these will not be elaborated upon here.

[0033] More specifically, such as Figures 1 to 4 As shown, the smoke collection box 20 may include a vertical box 21 extending downward from the rear of the fan box 10 and a horizontal box 22 extending forward from the upper part of the vertical box 21. A side-suction air inlet 210 communicating with the fan box 10 is provided at the lower part of the vertical box 21. A top-suction air inlet 220 communicating with the fan box 10 is provided at the bottom of the horizontal box 22. It is understood that the top-side dual-suction range hood of this application is typically installed on a wall, and the fan box 10 and the vertical box 21 are arranged close to the wall.

[0034] In particular, such as Figure 3 As shown, the vertical distance H between the rear edge of the top air intake 220 and the lower edge of the side air intake 210 is between 200mm and 450mm; the lateral distance D between the front edge of the top air intake 220 and the upper edge of the side air intake 210 is between 50mm and 350mm.

[0035] It is worth noting that cooking fumes typically go through three stages: generation, rising, and diffusion. Cooking utensils that generate a lot of fumes, such as woks, are usually less than 150mm high (i.e., the distance between the wok's opening and the stovetop is usually less than 150mm). Therefore, the fume generation area above the stovetop is usually between 150mm and 250mm from the stovetop, the fume rising area is usually between 250mm and 400mm from the stovetop, and the fume diffusion area is usually above 400mm from the stovetop.

[0036] However, as Figure 2 As shown, when a top-mounted dual-suction range hood is installed on a wall, the height h1 of the rear edge of its top-mounted air inlet 220 from the stovetop is typically controlled at around 600mm, placing it in the fume diffusion zone. This zone is primarily responsible for capturing the upward-diffusing fumes during cooking. At this time, since the vertical distance between the rear edge of the top-mounted air inlet 220 and the lower edge of the side-mounted air inlet 210 is between 200mm and 450mm, the height h2 of the lower edge of the side-mounted air inlet 210 from the stovetop in the top-mounted dual-suction range hood of this application is less than 400mm, placing it below the fume diffusion zone. This facilitates pulling the fumes backward in the fume rising zone and even the fume generating zone, causing the fume path in the fume diffusion zone to be further back, close to the surface of the vertical housing 21, and then smoothly entering the top-mounted air inlet 220, thus playing a complementary role.

[0037] In addition, although the top suction inlet 220 is located high to be in the oil fume diffusion area, since the transverse distance between the front edge of the top suction inlet 220 and the upper edge of the side suction inlet 210 is between 50mm and 350mm, the front edge of the top suction inlet 220 in the top-side dual suction range hood of the present application is far enough from the wall to ensure sufficient smoke gathering area and reduce oil fume escape, thereby improving the overall oil fume suction effect of the range hood.

[0038] Optionally, as shown in Figure 4 the thickness W of the vertical cabinet 21 at the upper edge of the side suction inlet 210 is between 50mm and 100mm, so that the size of the upper edge of the side suction inlet 210 from the wall is moderate, neither too large to cause the pot collision phenomenon, nor too small to affect the oil fume suction effect of the side suction inlet 210.

[0039] Preferably, the size of the front edge of the top suction inlet 220 from the wall is greater than or equal to 200mm; that is, the transverse distance between the front edge of the top suction inlet 220 and the rear wall of the vertical cabinet 21 is greater than or equal to 200mm, so as to ensure a large enough smoke gathering area and further reduce the risk of oil fume escape.

[0040] Exemplarily, as shown in Figures 2 to 4 the fan box 10 can include a fan box body 11 fixedly connected with the smoke collecting cabinet 20 and a fan body 12 arranged in the fan box body 11; the fan body 12 is located at the front of the fan box body 11 to form an air inlet passage corresponding to the vertical cabinet 21 at the rear of the fan box body 11.

[0041] Optionally, as shown in Figures 1 to 4 the vertical cabinet 21 includes a rectangular frame 211 with equal thicknesses up and down and providing the side suction inlet 210, and a flow guide plate body 212 extending obliquely from the lower edge of the side suction inlet 210 towards the rear upper side, so that the oil fume captured through the side suction inlet 210 is smoothly diverted to flow to the air inlet passage of the fan box 10, which is conducive to reducing the oil fume resistance.

[0042] Optionally, as shown in Figures 1 to 4 the transverse cabinet 22 includes a trapezoidal frame 221 extending from the upper part of the rectangular frame 211 along the bottom thickness of the fan box body 11 and providing the top suction inlet 220, so that the top suction inlet 220 is arranged obliquely to face the rear of the fan box body 11, which is conducive to the oil fume captured through the top suction inlet 220 to flow smoothly to the air inlet passage of the fan box 10, thereby reducing the oil fume resistance.

[0043] Notably, as shown in Figure 3 andFigure 4 As shown, for the specific size setting of the side suction air inlet 210 and the top suction air inlet 220 in the top-side dual-suction range hood of the present application, the design can be made from the fluid angle: L1 represents the vertical distance between the front edge of the top suction air inlet 220 and the fan shaft of the fan box 10; L2 represents the vertical distance between the upper edge of the side suction air inlet 210 and the fan shaft of the fan box 10; a represents the width of the top suction air inlet 220; and b represents the width of the side suction air inlet 210. According to the continuity equation, the flow rate Q of the fan box 10 is equal to the sum of the air suction flow rate Q1 of the top suction air inlet 220 and the air suction flow rate Q2 of the side suction air inlet 210, i.e. Q = Q1 + Q2. Further, according to the relationship between the air speed and the flow rate, the air suction flow rate Q1 of the top suction air inlet 220 is equal to the product of the air speed v1 of the top suction air inlet 220 and the area S1, i.e. Q1 = v1 x S1; and the air suction flow rate Q2 of the side suction air inlet 210 is equal to the product of the air speed v2 of the side suction air inlet 210 and the area S2, i.e. Q2 = v2 x S2.

[0044] In addition, according to the Darcy formula , it can be known that the friction loss is proportional to the square of the air speed v, i.e. the greater the air speed, the greater the friction loss. The flow distribution of the top suction air inlet 220 and the side suction air inlet 210 is determined by the resistance balance, although the lengths and areas of the ventilation channels from the two air inlets to the fan power of the fan box 10 are different (i.e. the position difference of the two air inlets leads to the difference of the resistance coefficient λ, the channel length L and the channel inner diameter d), the resistance characteristics are also different, but the flow distribution needs to satisfy the resistance balance principle, i.e. for the top suction air inlet 220 and the side suction air inlet 210, the total loss from the respective air inlet to the fan power is equal, otherwise the oil fume will not flow into the two air inlets at the same time, therefore the friction loss of the top suction air inlet 220 is equal to the friction loss of the side suction air inlet 210 , i.e. , wherein d1 is the inner diameter of the ventilation channel corresponding to the top suction air inlet 220; and d2 is the inner diameter of the ventilation channel corresponding to the side suction air inlet 210.

[0045] Further, substituting and into the above formula can obtain: ; wherein λ1 is the resistance coefficient corresponding to the top suction air inlet 220; λ2 is the resistance coefficient corresponding to the side suction air inlet 210; and g is the acceleration of gravity.

[0046] Simplifying can obtain: . Thus, it can be obtained that the inlet flow rate is inversely proportional to the square root of the resistance coefficient, i.e. ; and the inlet flow rate is inversely proportional to the square root of the length of the ventilation channel, i.e. ; the air inlet flow is proportional to the fifth power of the air inlet area, i.e. .

[0047] In summary, assuming that the position and size of the top suction air inlet 220 are unchanged, and the size of the side suction air inlet 210 is unchanged: when the vertical distance L2 between the side suction air inlet 210 and the fan box 10 increases, the air suction flow Q2 of the side suction air inlet 210 decreases, and at this time, according to the continuity equation, the air suction flow Q1 of the top suction air inlet 220 will increase; similarly, when the vertical distance L2 between the side suction air inlet 210 and the fan box 10 decreases, the air suction flow Q2 of the side suction air inlet 210 increases, and the air suction flow Q1 of the top suction air inlet 220 decreases. At this time, the air speed of the side suction air inlet 210 is inversely proportional to the vertical distance L2 between the side suction air inlet 210 and the fan box 10, i.e. .

[0048] And assuming that the position and size of the top suction air inlet 220 are unchanged, and the position of the side suction air inlet 210 is unchanged: when the area S2 of the side suction air inlet 210 decreases, the air suction flow Q2 of the side suction air inlet 210 decreases, and at this time, according to the continuity equation, the air suction flow Q1 of the top suction air inlet 220 will increase; at this time, the decrease of the area S2 of the side suction air inlet 210 will lead to an increase of the corresponding along-the-way resistance of the side suction air inlet 210, and cannot guarantee that the air speed of the side suction air inlet 210 increases.

[0049] Therefore, when balancing the flow between the top suction air inlet 220 and the side suction air inlet 210, the height adjustment of the air inlet position should be preferred, rather than the size adjustment of the air inlet area. Of course, the adjustment of the air inlet position and size needs to ensure a bottom line requirement, i.e. the air inlet speed is greater than the oil fume speed here, so as to ensure that the air inlet can capture oil fume.

[0050] Preferably, the area ratio between the top suction air inlet 220 and the side suction air inlet 210 is between 1.2 and 1.5, i.e. 1.2≤S2:S1≤1.5, so as to balance the flow and air speed ratio corresponding to the top suction air inlet 220 and the side suction air inlet 210, and obtain better oil suction effect.

[0051] More preferably, the flow ratio between the top suction inlet 220 and the side suction inlet 210 is between 1.5 and 2.5, i.e. 1.5≤Q2:Q1≤2.5. In this way, although the cross section of the oil fume increases during the rising process, the top-side dual-suction range hood of the present application can make the side suction inlet 210 located at the lower part of the vertical cabinet 21 close to the cooking bench (i.e. closer to the oil fume), so as to capture the oil fume at the initial stage of the rising process, and make the oil fume with smaller cross section close to the wall side (i.e. close to the vertical cabinet 21), of which about one third of the oil fume enters the range hood through the side suction inlet 210, and the remaining oil fume rises to the horizontal cabinet 22 to be captured by the top suction inlet 220 with larger area at the later stage of the rising process of the oil fume, so as to realize the multi-point smoke control effect of down-pull and up-suction, and obtain better oil fume suction effect, and avoid the escape of the oil fume.

[0052] Optionally, the wind speed of the top suction inlet 220 is greater than 2 m / s, and the wind speed of the side suction inlet 210 is greater than 1.8 m / s, so as to quickly capture the oil fume and obtain better oil fume suction effect.

[0053] According to the above embodiments of the present application, as shown in Figures 1 to 4 , the vertical cabinet 21 can further include a side suction grille 213 arranged inside the rectangular frame 211 and adjacent to the side suction inlet 210, so as to ensure the uniform wind speed at the side suction inlet 210. Similarly, the horizontal cabinet 22 can also include a top suction grille 222 arranged inside the trapezoidal frame 221 and adjacent to the top suction inlet 220, so as to ensure the uniform wind speed at the top suction inlet 220.

[0054] Optionally, as shown in Figure 3 and Figure 4 , the side suction grille 213 is arranged transversely inside the rectangular frame 211 and above the upper edge of the side suction inlet 210, so as to ensure that the side suction grille 213 is hidden inside the rectangular frame 211, and the user cannot see the side suction grille 213 from the side suction inlet 210, which is beneficial to ensure the overall aesthetics of the top-side dual-suction range hood.

[0055] Optionally, as shown in Figures 1 to 4As shown, the horizontal housing 22 also includes a top suction baffle 223 that is rotatably disposed on the trapezoidal frame 221 to open or close the top suction inlet 220, and a top suction drive mechanism 224 installed within the trapezoidal frame 221 to drive the top suction baffle 223. When the top suction baffle 223 is flipped forward under the drive of the top suction drive mechanism 224 to open the top suction inlet 220, the top suction baffle 223 extends forward and downward at an angle to form a smoke-gathering area at the top suction inlet 220 to prevent oil fumes from escaping; when the top suction baffle 223 is flipped backward under the drive of the top suction drive mechanism 224 to close the top suction inlet 220, the top suction baffle 223 extends backward and downward at an angle, so that the outer surface of the top suction baffle 223 is flush with the lower surface of the trapezoidal frame 221, which helps to ensure the overall aesthetics of the top-side dual-suction range hood. It is understandable that when the top suction baffle 223 closes the top suction air inlet 220, the side suction air inlet 210 can still capture oil fumes to meet the low oil fume suction and exhaust requirements.

[0056] Optionally, such as Figures 1 to 4 As shown, the vertical housing 21 also includes a side suction baffle 214 slidably disposed on the rectangular frame 211 to open or close the side suction inlet 210, and a side suction drive mechanism 215 installed inside the rectangular frame 211 to drive the side suction baffle 214. When the side suction baffle 214 slides upward under the drive of the side suction drive mechanism 215 to open the side suction inlet 210, the side suction baffle 214 extends vertically to overlap the front wall of the rectangular frame 211, preventing the oil fumes from rising upward along the front wall of the rectangular frame 211; when the side suction baffle 214 slides downward under the drive of the side suction drive mechanism 215 to close the side suction inlet 210, the side suction baffle 214 still extends vertically, so that the outer surface of the side suction baffle 214 is flush with the front surface of the rectangular frame 211. It is understandable that when the side suction baffle 214 closes the side suction air inlet 210, the top suction air inlet 220 can still capture oil fumes to meet the high oil fume suction and exhaust requirements.

[0057] It is worth noting that the top suction drive mechanism 224 and the side suction drive mechanism 215 mentioned in this application can be, but are not limited to, composed of a push rod motor and a connecting rod. Of course, in other examples of this application, the top suction drive mechanism 224 and the side suction drive mechanism 215 mentioned in this application can also be, but are not limited to, composed of a rotary motor and a crank, as long as they can respectively drive the top suction baffle 223 to flip back and forth to open or close the top suction air inlet 220 and drive the side suction baffle 214 to slide up and down to open or close the side suction air inlet 210. This application will not elaborate further on this.

[0058] According to the above embodiments of this application, as Figures 1 to 4As shown, the top-side double-suction range hood of the present application can further comprise an oil cup 30 detachably arranged at the bottom of the vertical cabinet 21 and communicating with the vertical cabinet 21, for receiving the oil stains flowing from the vertical cabinet 21. It can be understood that the bottom of the vertical cabinet 21 is provided with an oil leakage hole communicating with the oil cup 30, which will not be described herein.

[0059] Preferably, as Figures 1 to 4 As shown, the thickness of the oil cup 30 is greater than that of the rectangular frame 211, so that the front wall of the oil cup 30 protrudes forward beyond the front wall surface of the rectangular frame 211, ensuring that the oil stains dripping from the upper edge of the side suction inlet 210 can fall into the oil cup 30.

[0060] In addition, the top-side double-suction range hood of the present application can also be controlled by a voice module, which is installed with a controller, a voice receiving module and a voice analysis module. The voice receiving module receives the user's instructions, and the voice analysis module analyzes the instructions. According to the analyzed instructions, the controller controls the top-side double-suction range hood to perform corresponding operations, thereby realizing the intelligent regulation and control of the top-side double-suction range hood and improving the user's experience.

[0061] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0062] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application.

Claims

1. A top-side dual-suction extractor hood, characterized in that The top-side dual suction range hood comprises: a fan box; and a smoke collecting box comprising a vertical box body extending downward from a rear portion of the fan box and a transverse box body extending forward from an upper portion of the vertical box body; a lower portion of the vertical box body is provided with a side suction air inlet communicating with the fan box; a bottom portion of the transverse box body is provided with a top suction air inlet communicating with the fan box; a vertical distance between a rear edge of the top suction air inlet and a lower edge of the side suction air inlet is between 200 mm and 450 mm; a transverse distance between a front edge of the top suction air inlet and an upper edge of the side suction air inlet is between 50 mm and 350 mm.

2. The top side double suction cooking fume extractor as claimed in claim 1 wherein, A thickness of the vertical box body at the upper edge of the side suction air inlet is between 50 mm and 100 mm.

3. The top side double suction cooking fume extractor as claimed in claim 1 wherein, The transverse distance between the front edge of the top suction air inlet and the rear wall of the vertical box body is greater than or equal to 200 mm.

4. The top side double suction cooking fume extractor as claimed in claim 1 wherein, An area ratio between the top suction air inlet and the side suction air inlet is between 1.2 and 1.

5.

5. The top side double suction cooking fume extractor as claimed in claim 1 wherein, A flow ratio between the top suction air inlet and the side suction air inlet is between 1.5 and 2.5; a wind speed of the top suction air inlet is greater than 2 m / s, and a wind speed of the side suction air inlet is greater than 1.8 m / s.

6. The top side suction range hood according to any one of claims 1 to 5, characterized in that The fan box comprises a fan box body fixedly connected with the smoke collecting box and a fan main body arranged in the fan box body; the fan main body is located at a front portion of the fan box body to form an air inlet passage corresponding to the vertical box body at a rear portion of the fan box body.

7. The top side double suction exhaust hood as claimed in claim 6 wherein, The vertical box body comprises a rectangular frame with equal thicknesses from top to bottom and providing the side suction air inlet and a flow guide plate body extending obliquely upward and rearward from a lower edge of the side suction air inlet; the transverse box body comprises a trapezoidal frame extending from an upper portion of the rectangular frame along a bottom thickness of the fan box body and providing the top suction air inlet.

8. The top side double suction exhaust hood as claimed in claim 7 wherein, The vertical box body further comprises a side suction grille arranged in the rectangular frame and adjacent to the side suction air inlet; the side suction grille is arranged transversely in the rectangular frame and above an upper edge of the side suction air inlet; the transverse box body further comprises a top suction grille arranged in the trapezoidal frame and adjacent to the top suction air inlet.

9. The top side double suction exhaust hood as claimed in claim 7 wherein, The transverse box body further comprises a top suction baffle reversibly arranged in the trapezoidal frame to open or close the top suction air inlet and a top suction driving mechanism mounted in the trapezoidal frame to drive the top suction baffle; the vertical box body further comprises a side suction baffle slidably arranged in the rectangular frame to open or close the side suction air inlet and a side suction driving mechanism mounted in the rectangular frame to drive the side suction baffle.

10. The top side double suction exhaust hood as claimed in claim 7 wherein, The top-side dual suction range hood further comprises an oil cup detachably arranged at a bottom portion of the vertical box body and communicating with the vertical box body; a thickness of the oil cup is greater than a thickness of the rectangular frame.

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