Range hood

Abstract

The utility model discloses a range hood which comprises a lower box body assembly, the lower box body assembly comprises a lower box body, an exhaust fume collecting hood arranged at the bottom of the lower box body and an oil cup arranged at the bottom of the rear side of the exhaust fume collecting hood, and an air inlet is formed in the bottom surface of the exhaust fume collecting hood; the lower box body assembly further comprises an oil collecting ring arranged at the air inlet. The flow guide ring is used for guiding oil smoke to enter the lower box body and is arranged on the oil collecting ring, so that a space defined by the oil collecting ring and the flow guide ring jointly forms a smoke gathering cavity, and the oil collecting ring can collect oil liquid flowing down from the flow guide ring. Compared with the prior art, the range hood has the advantages that the oil collecting ring and the flow guide ring are used for forming the smoke gathering cavity, the flow guide ring is used for guiding oil smoke into the lower box body, common filter screens such as a grating net at the air inlet are omitted, and the problem that cleaning is difficult due to the arrangement of the grating net is solved; and the oil collecting ring is used for effectively collecting oil condensed on the flow guide ring, so that the frequency of wiping the smoke collecting hood of the range hood by a user can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to an oil fume purification device, in particular to an oil fume extractor. Background Art

[0002] As an essential kitchen appliance for every family, range hoods are generally divided into top suction type and side suction type. Top suction range hoods usually include a fume hood and a fan frame located on the fume hood. The fan frame is equipped with a volute, an impeller, and a motor driving the impeller. An air inlet is arranged in the center of the fume hood and is directly connected to the high negative pressure area where the fan frame is located. As disclosed in Chinese patent application number 202121190529.6 or 201821996599.9.

[0003] The top suction range hood has a strong suction force and is well matched with the kitchen cabinet and other environments. However, there are also some problems as follows:

[0004] 1. The smoke collection hood of a top-suction range hood generally contains a concave smoke collection chamber and an oil net structure. The smoke collection chamber is used to collect the oil smoke generated during cooking, making it easier for the range hood to inhale it. After the oil smoke passes through the range hood, the oil separated from the oil flows down through the side wall of the range hood and is guided to the oil cup at the rear end through the oil net. This type of structure has the following problems:

[0005] 1.1. The smoke collecting chamber is always gathering and contacting the oil smoke, and it is very easy for oil droplets to condense on the inner wall of the smoke collecting chamber. In order to prevent the oil droplets from dripping onto the countertop, the user needs to frequently wipe the surface of the smoke collecting chamber of the smoke collecting hood, which results in a poor operating experience.

[0006] 1.2. The oil net structure is the commonly used diversion structure for range hoods. Because it is always in an oil fume environment and the oil net is generally a grille hole structure due to the diversion requirements, it is easy to accumulate oil and is not easy to clean.

[0007] 2. The middle of the bottom of the smoke collection hood of a ceiling-type range hood usually contains a concave upward smoke collection cavity. Under the action of the suction force of the range hood, the oil smoke enters the range hood along the smoke collection cavity. Oil droplets usually easily condense at the turning edge between the bottom plane of the smoke collection hood and the smoke collection cavity. Users need to wipe it in time, otherwise it is easy to drip and affect the user experience.

[0008] Therefore, there is room for further improvement. Utility Model Content

[0009] The first technical problem to be solved by the utility model is to provide a range hood that is easy to clean and reduces the frequency of users wiping the smoke hood in view of the deficiencies in the above-mentioned prior art.

[0010] The second technical problem to be solved by the utility model is to provide a range hood to solve the oil circuit in the absence of a filter so that the oil cup can be collected.

[0011] The utility model solves the above-mentioned first technical problem by adopting a technical solution: a range hood, comprising a lower box assembly, the lower box assembly comprising a lower box, a fume hood arranged at the bottom of the lower box, and an oil cup arranged at the rear bottom of the fume hood, the bottom surface of the fume hood is provided with an air inlet; the characteristics are:

[0012] The lower box assembly also includes:

[0013] An oil collecting ring is arranged at the air inlet; and

[0014] The guide ring is used to guide the oil smoke into the lower box body and is arranged on the oil collecting ring, so that the space enclosed by the oil collecting ring and the guide ring together constitutes a smoke collecting chamber, and the oil collecting ring can collect the oil flowing down from the guide ring.

[0015] An oil collecting ring and a guide ring are used to form a smoke collecting chamber, and the guide ring is used to guide the oil smoke into the lower box body, eliminating the commonly used grille mesh and other filters at the air inlet, solving the problem of difficulty in cleaning caused by the setting of the grille mesh. The oil collecting ring is used to effectively collect the condensed oil on the guide ring, which can greatly reduce the frequency of users wiping the range hood.

[0016] Preferably, the guide ring includes an annular first enclosure and a guide ring body extending upward from the inner periphery of the first enclosure, the diameter of the guide ring body gradually decreases from bottom to top, and the projection of the junction of the guide ring body and the first enclosure on the horizontal plane is within the projection range of the oil collecting ring on the horizontal plane.

[0017] To facilitate the oil on the guide ring to flow smoothly downward along the wall and drip vertically from the wall, the angle between the tangent of each point on the part of the guide ring body outside the projection of the oil collecting ring on the horizontal plane and the horizontal plane is greater than 8°.

[0018] Preferably, in order to facilitate the oil collecting ring to collect oil on the front side of the guide ring, the oil collecting ring includes an oil collecting groove, a first oil leakage hole is opened on the rear bottom of the oil collecting groove, and the first oil leakage hole is located above the oil cup, and a second oil leakage hole is opened on the front side of the first enclosure of the guide ring, and the second oil leakage hole is located above the oil collecting groove.

[0019] In order to seal the smoke collecting hood and the outer periphery of the guide ring and prevent oil leakage on the wall, an annular support frame is arranged around the oil collecting ring, the bottom surface of the support frame is connected to or integrated with the smoke collecting hood, the upper end of the support frame is connected to the bottom surface of the first enclosure of the guide ring, and a third oil leakage hole is opened at a position of the support frame corresponding to the second oil leakage hole.

[0020] Furthermore, in order to facilitate the guide ring to receive the oil in the lower box and to facilitate the collection by the smoke hood and the oil collecting ring, the outer periphery of the first enclosure of the guide ring is formed with first ribs extending upward on the front, left and right sides.

[0021] Preferably, in order to facilitate the oil flowing backward from the guide ring to be guided into the oil cup, a fourth oil leakage hole is opened at a position adjacent to the support frame on the rear side of the smoke hood, and the fourth oil leakage hole is located above the oil cup.

[0022] Preferably, the oil collecting ring includes an annular second enclosure plate and an oil collecting ring body extending upward from the inner periphery of the second enclosure plate, the diameter of the oil collecting ring body gradually decreases from bottom to top, the second enclosure plate and the oil collecting ring body together constitute an open oil collecting tank, the second enclosure plate is provided with a first oil leakage hole at a bottom position corresponding to the oil collecting tank, and the first oil leakage hole is located above the oil cup.

[0023] In order to facilitate the disassembly and assembly of the oil collecting ring for cleaning, the front side of the oil collecting ring is plugged into the smoke collecting hood, and the rear side of the oil collecting ring is fixed to the smoke collecting hood by magnetic attraction.

[0024] The first technical solution adopted by the utility model to solve the above second technical problem is: the guide ring includes an annular first enclosure plate and a guide ring body extending upward from the inner periphery of the first enclosure plate;

[0025] The range hood further comprises an upper box assembly, the upper box assembly comprising an upper box, a fan system at least partially disposed in the upper box, and an upper oil guide plate disposed below the fan system, the upper box at least partially being disposed above the lower box, and the projection of the rear end of the upper oil guide plate on a horizontal plane being disposed behind the projection of the guide ring body on a horizontal plane, thereby preventing the oil of the fan system from directly penetrating the guide ring downwards and dripping.

[0026] Furthermore, in order to facilitate guiding the oil in the upper oil guide plate to flow downward, the upper oil guide plate includes an upper oil guide plate body that gradually tilts downward from front to rear and a bent portion that bends upward from the rear end of the upper oil guide plate body, and a fifth oil leakage hole is formed on the left and right ends of the bent portion.

[0027] In order to prevent the oil collected on the upper oil guide plate from directly penetrating the guide ring and dripping downward, the projection of the upper oil guide plate body on the horizontal plane at least covers the projection of the upper end opening of the guide ring body on the horizontal plane.

[0028] Furthermore, the guide ring includes an annular first enclosure plate and a guide ring body extending upward from the inner periphery of the first enclosure plate;

[0029] The lower box assembly also includes a lower oil guide plate arranged in the lower box, the lower oil guide plate gradually tilts downward from the rear side wall of the lower box, and the front end of the lower oil guide plate is located at the rear side of the guide ring body.

[0030] This allows the oil at the rear of the lower housing to be guided downward and collected into the oil cup.

[0031] In order to further collect the oil flowing down from the side walls of the lower box into the oil cup, the lower box assembly also includes a front oil guide plate and a side oil guide plate, the front oil guide plate is arranged on the inner side of the front side wall of the lower box, the bottom of the front oil guide plate is located at the front side of the guide ring body, the side oil guide plates have two and are respectively located on the inner sides of the left and right walls of the lower box, a first oil guide groove is formed at the bottom of the lower oil guide plate, a second oil guide groove is formed at the bottom of the front oil guide plate, a third oil guide groove is formed at the bottom of the side oil guide plate, sixth oil leakage holes are formed at the left and right side ends of the bottom of the first oil guide groove, seventh oil leakage holes are formed at the left and right side ends of the bottom of the second oil guide groove, the third oil guide groove is located below the sixth oil leakage hole and the seventh oil leakage hole, the bottom of the third oil guide groove gradually tilts downward from front to rear, and the rear end of the third oil guide groove is located above the oil cup.

[0032] In order to collect the oil flowing down from the gaps between the oil guide plates and the guide rings, the outer periphery of the first enclosure of the guide ring is formed with first ribs extending upward on the front, left and right sides, and the rear bottom of the smoke hood is provided with a fourth oil leakage hole for the oil on the outer wall of the guide ring to flow through, and the fourth oil leakage hole is located above the oil cup.

[0033] To ensure the air intake, the guide ring includes an annular first enclosure and a guide ring body extending upward from the inner periphery of the first enclosure, the horizontal spacing between the front end of the upper end of the guide ring body and the front end of the lower end is a, the horizontal spacing between the left end of the upper end of the guide ring body and the left end of the lower end is b, the horizontal spacing between the right end of the upper end of the guide ring body and the right end of the lower end is b, and the value ranges of a and b are respectively greater than 50mm, thereby reducing the turning speed of the oil smoke on the bottom plane of the smoke hood entering the smoke collection chamber and reducing the oil accumulation at the bottom of the oil collecting ring.

[0034] Compared with the prior art, the advantages of the utility model are: a smoke collecting chamber is formed by utilizing an oil collecting ring and a guide ring, and the oil smoke is guided into the lower box body by utilizing the guide ring, thereby eliminating the commonly used filter screens such as the grille mesh at the air inlet, solving the problem of difficulty in cleaning caused by the setting of the grille mesh, and utilizing the oil collecting ring to effectively collect the oil condensed on the guide ring, which can greatly reduce the frequency of users wiping the range hood; the detachable structure of the oil collecting ring can realize quick disassembly and cleaning; by arranging an upper oil guide plate, a lower oil guide plate, a front oil guide plate and / or a side oil guide plate, an oil circuit is formed, thereby solving the oil guide problem without a grille mesh. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of a range hood according to an embodiment of the utility model;

[0036] Figure 2 A schematic diagram of a range hood according to an embodiment of the utility model (viewed from the back to the front);

[0037] Figure 3 This is a cross-sectional view of a range hood according to an embodiment of the utility model (front-to-back cross-section, in a descending state);

[0038] Figure 4 A schematic diagram of a guide ring and an oil collecting ring of a range hood according to an embodiment of the utility model;

[0039] Figure 5 This is a schematic diagram of the exploded structure of the guide ring and the oil collecting ring of the range hood according to the embodiment of the utility model;

[0040] Figure 6 It is a cross-sectional view (horizontal cross-section) of a range hood according to an embodiment of the utility model;

[0041] Figure 7 It is a cross-sectional view (front-to-back cross-section) of a smoke collecting hood, a guide ring and an oil collecting ring of a range hood according to an embodiment of the utility model;

[0042] Figure 8 It is a schematic diagram of an upper oil guide plate of a range hood according to an embodiment of the utility model;

[0043] Fig. 9 It is a schematic diagram of a lower oil guide plate of a range hood according to an embodiment of the utility model;

[0044] Fig.10 A schematic diagram of a front oil guide plate of a range hood according to an embodiment of the utility model;

[0045] Fig.11 It is a schematic diagram of a side oil guide plate of a range hood according to an embodiment of the utility model;

[0046] Fig.12 A bottom view of the range hood according to an embodiment of the utility model;

[0047] Fig.13 A schematic diagram of a smoke collecting hood of a range hood according to an embodiment of the utility model;

[0048] Fig.14 It is a cross-sectional view of the range hood according to an embodiment of the utility model (front-to-back cross-section, in an ascending state). DETAILED DESCRIPTION

[0049] Embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions.

[0050] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present utility model can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0051] See also Figure 1 to Figure 7 A range hood includes an upper box assembly and a lower box assembly, wherein the upper box assembly includes an upper box 11 and a fan system 12 at least partially disposed in the upper box 11, wherein the upper box 11 is fixed to an external mounting base such as a wall, and the fan system 12 is preferably a centrifugal fan. The lower box assembly includes a lower box 21, a fume hood 22 disposed at the bottom of the lower box 21, and an oil cup 23 disposed at the bottom of the rear side of the fume hood 22.

[0052] The front-to-back width L1 of the lower box 21 is smaller than the front-to-back width L2 of the fume hood 22. The front-to-back width L1 of the lower box 21 is preferably 293 mm, and the front-to-back width L2 of the fume hood 22 is preferably 343 mm, which greatly increases the distance between the range hood and the user's standing position, increases the user's operating space, and solves the problem of the traditional top-suction range hood hitting the head. In addition, the front-to-back width of the lower box 21 can meet the requirements of basically all cabinets and cabinets; the front-to-back width of the fume hood 22 can meet the requirements of cabinets and cabinets with a thickness of about 370. When the range hood is turned off and the lower box assembly rises, the range hood can be completely accommodated in the cabinet.

[0053] Compared with the general top-suction range hood, although the front and rear width of the smoke hood 22 is shortened, it may cause the range hood to have poor smoke collection ability, resulting in poor smoke collection effect and smoke leakage during operation. Considering this problem, the utility model adjusts the height distance between the smoke hood 22 and the stove by lifting. For example, when the smoke is large, the range hood can be controlled to descend to ensure the smoke collection effect. In the above manner, the smoke collection effect is ensured while solving the problem that the smoke hood of the top-suction range hood cannot be accommodated in the cabinet, thereby improving the appearance quality.

[0054] As described above, the lower box 21 can be raised and lowered relative to the upper box 11. For this purpose, the range hood further includes a motion mechanism for driving the lower box 21 to be raised and lowered. The motion mechanism is fixedly arranged on a driving mechanism 31 on the upper box 11 and a transmission mechanism for transmitting the output of the driving mechanism 31 to the lower box 21. In this embodiment, the driving mechanism 31 is a motor, which is arranged on the top of the upper box 11. The transmission mechanism includes a screw rod 32 and a connecting plate 33. The screw rod 32 is arranged on the rear side of the upper box 11 and extends vertically, and is driven by the driving mechanism 31 to rotate around its own axis. The connecting plate 33 is fixed to the lower box 21, and is connected to the screw rod 32 at the middle position. The connection method is a threaded connection. The connecting plate 33 can be threadedly connected to the direct screw rod 32, or a separate nut can be provided to be threadedly connected to the screw rod 32 indirectly. Therefore, when the driving mechanism 31 is started, the lower box 21 can be driven to be raised and lowered by the transmission mechanism.

[0055] In order to make the lower box body 21 rise and fall smoothly, the motion mechanism also includes a guide rail assembly. The guide rail assembly may have two groups, which are respectively arranged on the left and right sides of the rear side of the upper box body 11. Each group of guide rail assemblies includes a first guide rail 341 and a second guide rail 342. The first guide rail 341 is fixed to the rear side of the upper box body 11, and the second guide rail 342 is fixed to the connecting plate 33. The two can be directly fixed, or as shown in the present embodiment, angle steels 331 are respectively arranged on the left and right sides of the connecting plate 33, which are fixed to the second guide rail 342 through the angle steels 331.

[0056] The bottom of the upper box body 11 extends into the lower box body 21, thereby preventing the oil in the upper box body 11 from leaking to the outside of the range hood through the installation gap.

[0057] An air inlet 221 is provided on the bottom surface of the smoke hood 22. The lower box assembly also includes a guide ring 24 and an oil collecting ring 25. The oil collecting ring 25 is arranged at the air inlet 221. The guide ring 24 includes an annular first enclosure 241 and an oil collecting ring body 242 extending upward from the inner periphery of the first enclosure 241. The caliber of the guide ring body 242 gradually decreases from bottom to top. The guide ring body 242 can be streamlined in design, conforming to the oil smoke flow path, without vortex, and reducing flow loss. The oil collecting ring 25 is arranged under the enclosure 241 of the guide ring 24. The oil collecting ring 25 includes an annular second enclosure 251 and an oil collecting ring body 252 extending upward from the inner periphery of the second enclosure 251. The caliber of the oil collecting ring body 252 gradually decreases from bottom to top. The oil collecting ring body 252 can partially extend to the position directly below the guide ring body 252. The second enclosure 251 and the oil collecting ring body 252 together form an open oil collecting groove 253. The second enclosure 251 is provided with a first oil leakage hole 254 at the bottom position corresponding to the oil collecting groove 253, and the first oil leakage hole 254 is located above the oil cup 23. The projection of the intersection of the guide ring body 242 and the first enclosure 241 on the horizontal plane is located within the projection range of the oil collecting ring 25 (oil collecting groove 253) on the horizontal plane, so as to collect the oil flowing down from the inner wall of the guide ring body 242. The front part of the first enclosure 241 is provided with a second oil leakage hole 244, and the second oil leakage hole 244 is located above the oil collecting groove 253. There is a certain gap between the oil collecting ring 25 and the guide ring 24, and the width of the oil collecting ring body 252 should not be too large to avoid absorbing too much oil.

[0058] During the operation of the range hood, the guide ring body 242 on the guide ring 24 is prone to accumulate oil, and the oil flows downward along the inner side of the arc-shaped wall of the guide ring body 242, flows into the oil collecting groove 253 of the annular oil collecting ring 25 through the gap between the oil collecting ring 25 and the guide ring 24, and the oil in the oil collecting groove 253 flows into the oil cup 23 through the first oil leakage hole 254.

[0059] In order to ensure smooth flow of oil on the guide ring 24, the guide ring body 242 corresponds to the part outside the oil collecting ring 25 (this part refers to the part where the projection of the guide ring body 242 on the horizontal plane does not overlap with the projection of the oil collecting ring 25 on the horizontal plane), and the angle α between the tangent of each point on it and the horizontal plane is greater than 8°, preferably greater than 12°.

[0060] The air inlet structure of the utility model eliminates the traditional grille and guides the oil condensed on the guide ring 24 with the function of collecting oil smoke to the oil collecting ring 25. The oil collecting ring 25 has an oil leakage hole at the rear side to allow the oil to enter the oil cup 23. The above structure solves the problem that users frequently wipe the smoke collecting chamber and the grille is difficult to clean.

[0061] The oil collecting ring 25 only receives the oil absorbed by the guide ring 24 and a small amount of oil flowing into the inner gap, so it collects less oil and generally does not need to be cleaned. If the range hood is used for a long time and needs to be cleaned, the oil collecting ring 25 is provided with a quick-release structure for easy disassembly and assembly. Figure 5 The outer periphery of the second enclosure 251 of the oil collecting ring 25 is formed with a second rib 255 extending upward, and a buckle 256 is provided on the second rib 255 located on one of the front and rear sides, which can be inserted into the corresponding position of the smoke collecting hood 22, and a magnet 257 is provided on the second rib 255 located on the other of the front and rear sides, which can be fixed with the smoke collecting hood 22 by magnetic attraction. Since the oil collecting ring 25 is slender, this structure is not easy to cause deformation of the oil collecting ring 25 during disassembly and assembly, and is convenient for users to disassemble and clean.

[0062] In order to improve the appearance integrity of the bottom of the smoke hood 22, the oil collecting ring 25 can be integrated with the structure of the smoke hood 22, that is, the bottom of the smoke hood 22 is designed with an annular arc surface structure similar to the shape of the oil collecting ring 25. A support frame 29 is arranged around the oil collecting ring 25. The support frame 29 is annular in shape, and the bottom surface is connected to or integrated with the smoke hood 22. The upper end is connected to the bottom surface of the guide ring 24 (such as the bottom surface of the first enclosure 241), so that an outer closed space is formed between the smoke hood 22 and the guide ring 24. A third oil leakage hole 291 is opened at the position corresponding to the second oil leakage hole 244 of the support frame 29. See Figure 7 and Fig.13 The oil flowing down from the outer surface of the front side wall of the guide ring 24 flows downward through the second oil leakage hole 244, and enters the oil collecting groove 253 of the oil collecting ring 25 along the third oil leakage hole 291 of the support frame 29. A fourth oil leakage hole 222 is provided at a position adjacent to the support frame 29 on the rear bottom surface of the smoke collecting hood 22. The fourth oil leakage hole 222 is located above the oil cup 23. The oil flowing down from the outer side of the rear side wall of the guide ring 24 flows backward along the top surface of the support frame 29 to the rear bottom surface of the smoke collecting hood 22, and then enters the oil cup 23 through the fourth oil leakage hole 222. Due to the existence of the support frame 29, this part of the oil will not enter the oil collecting ring 25, thereby reducing the amount of oil collected by the oil collecting ring 25.

[0063] In addition, the utility model changes the oil path form of the traditional top-suction range hood, where the oil on the front left and right sides of the range hood is guided by the grille oil net. Figure 3 , Figure 8 to Figure 11 The upper box assembly also includes an upper oil guide plate 13, and the lower box assembly also includes a lower oil guide plate 26, a front oil guide plate 27 and a side oil guide plate 28.

[0064] The upper oil guide plate 13 is fixed below the fan system 12. The lower oil guide plate 26 is fixed in the lower box 21, and gradually tilts downward from the rear side wall of the lower box 21, and the front end of the lower oil guide plate 26 is located at the rear side of the guide ring body 242. The upper oil guide plate 13 includes an upper oil guide plate body 131 that gradually tilts downward from the front to the back, and a bending portion 132 that bends upward from the rear end of the upper oil guide plate body 131. The upper oil guide plate body 131 has an inclination angle β>8°, preferably>12°, so that the oil on the inclined surface can flow smoothly backward. The left and right sides of the upper oil guide plate body 131 can be installed with the upper box 11 by setting a mounting plate 133. A fifth oil leakage hole 134 can be formed at the left and right ends of the bending portion 132, so that the oil on the upper oil guide plate 13 flows downward through the fifth oil leakage hole 134. The projection of the rear end of the upper oil guide plate 13 on the horizontal plane is located behind the projection of the guide ring body 242 on the horizontal plane, thereby ensuring that the oil on the rear side of the upper oil guide plate 13 can fall on the lower oil guide plate 26 without dripping through.

[0065] The front oil guide plate 27 is arranged on the inner side of the front wall of the lower box body 21 , and its bottom is located on the front side of the guide ring body 242 . There are two side oil guide plates 28 which are respectively located on the inner side of the left wall and the inner side of the right wall of the lower box body 21 . A first oil guide groove 261 (such as one that can be formed by bending) is formed at the bottom of the lower oil guide plate 26, a second oil guide groove 271 (such as one that can be formed by bending) is formed at the bottom of the front oil guide plate 27, and a third oil guide groove 281 (such as one that can be formed by bending) is formed at the bottom of the side oil guide plate 28. Sixth oil leakage holes 262 are formed at the left and right ends of the bottom surface of the first oil guide groove 261, and seventh oil leakage holes 272 are formed at the left and right ends of the bottom surface of the second oil guide groove 271. The third oil guide groove 281 is located below the sixth oil leakage hole 262 and the seventh oil leakage hole 272. The bottom surface of the third oil guide groove 281 gradually tilts downward from front to rear, and its rear end is located above the oil cup 23, thereby guiding the oil in the first oil guide groove 261 and the second oil guide groove 271 backward and finally into the oil cup 23.

[0066] When the range hood is working, the oil smoke sucked into the range hood is separated, and the waste oil flows from the fan system 2 to the upper oil guide plate 13, flows along the upper oil guide plate body 131 from the fifth oil leakage holes 134 on the left and right sides of the upper oil guide plate 13 to the lower oil guide plate 26, and then flows from the sixth oil leakage hole 262 of the lower oil guide plate 26 to the third oil guide groove 281 of the side oil guide plate 28, and then is guided to the oil cup 23 at the rear side of the range hood. The oil on the left and right side walls of the lower case 21 of the range hood flows along the side walls to the third oil guide groove 281 of the side oil guide plate 28 and is guided to the oil cup 23; the oil on the front inner wall of the lower case 21 enters the third oil guide groove 281 of the side oil guide plate 28 along the second oil guide groove 271 and the seventh oil leakage hole 272 on the front oil guide plate 27, and is guided to the oil cup 23.

[0067] The front oil guide plate 27 and the side oil guide plate 28 may be independent plates, or may be formed by utilizing the wall of the lower box body 21 .

[0068] There is a small gap between the side oil guide plate 28, the lower oil guide plate 26, the front oil guide plate 27 and the guide ring 24, and a small amount of oil may enter the gap. In order to effectively recover this part of the oil, the outer periphery of the first enclosing plate 241 of the guide ring 24 is formed with a first rib 243 ( Figure 5 The oil entering the outer wall of the guide ring 24 from the gap flows along the guide ring body 242 to the first enclosure 241, the oil on the front side can flow into the oil collecting ring 25 at the bottom from the second oil leakage hole 244, and the rest of the oil can flow into the rear smoke collecting hood 22 along the first rib 243 and enter the oil cup 23 through the fourth oil leakage hole 222.

[0069] The oil path flow guiding structure (the oil guide plates, the flow guide ring 24, the oil collecting ring 25 and the smoke collecting hood 22) solves the oil path problem of the top suction range hood without a grille oil net.

[0070] Since the range hood of the utility model eliminates the grille oil net, the middle of the guide ring 24 is perforated, and after the range hood lower case 21 rises, the user can easily observe and touch the internal structure of the range hood. To this end, in this embodiment, the projection of the upper oil guide plate body 131 on the horizontal plane at least covers the projection of the upper end opening of the guide ring body 242 on the horizontal plane, and the projection area of ​​the upper oil guide plate body 131 on the horizontal plane ≥ the projection area of ​​the upper end opening of the guide ring body 242 on the horizontal plane. And when the range hood lower case 21 rises to the position, the upper oil guide plate body 131 covers the upper end opening of the guide ring 24, see Fig.14 .

[0071] The space enclosed by the oil collecting ring 25 and the guide ring 25 together constitutes a smoke collecting chamber Q, see Fig.12 , the horizontal spacing between the front end of the upper end of the guide ring body 242 and the front end of the lower end is a, and the horizontal spacing between the left (right) end of the upper end of the guide ring body 242 and the left (right) end of the lower end is b. In order to solve the problem that oil droplets are easily condensed at the turning edge between the bottom plane of the smoke hood 22 and the smoke collecting chamber Q (that is, the bottom surface of the second enclosure 251 of the oil collecting ring 25), the value range of a and b is >50mm, preferably >60mm, thereby reducing the turning speed of the oil smoke on the bottom plane of the smoke hood 22 entering the smoke collecting chamber Q by appropriately extending the guide area of ​​the guide ring in front of the guide ring and on the left and right sides. At the same time, in order to ensure the oil smoke suction effect of the range hood, it is necessary to ensure that the air inlet area at the upper end opening of the guide ring 24 is >500cm 2At the same time, the sum of the air inlet area between the front side of the upper oil guide plate 13 and the lower box body 21 and the air inlet area between the rear side of the upper oil guide plate 13 and the lower box body 21 is also > 500cm 2 The air inlet area between the upper oil guide plate 13 and the lower box body 21 here refers to the horizontal plane area between the front side of the upper oil guide plate 13 and the front side wall of the lower box body 21 (the left and right boundaries are the left and right side walls of the lower box body 21), and the horizontal plane area between the rear side of the upper oil guide plate 13 and the front side wall of the lower box body 21 (the left and right boundaries are the left and right side walls of the lower box body 21), which can simultaneously ensure the oil fume absorption effect and delay the oil accumulation at the bottom of the oil collecting ring 25.

Claims

1. A range hood, comprising a lower box assembly, the lower box assembly comprising a lower box (21), a fume hood (22) arranged at the bottom of the lower box (21), and an oil cup (23) arranged at the bottom of the rear side of the fume hood (22), the bottom surface of the fume hood (22) being provided with an air inlet (221); characterized in that: The lower box assembly also includes: An oil collecting ring (25) is arranged at the air inlet (221); and The guide ring (24) is used to guide the oil smoke into the lower box (21) and is arranged on the oil collecting ring (25), so that the space enclosed by the oil collecting ring (25) and the guide ring (24) together constitutes a smoke collecting chamber (Q), and the oil collecting ring (25) can collect the oil flowing down from the guide ring (24).

2. The range hood according to claim 1, characterized in that: The guide ring (24) comprises an annular first enclosure (241) and a guide ring body (242) extending upward from the inner periphery of the first enclosure (241); the diameter of the guide ring body (242) gradually decreases from bottom to top; and the projection of the junction between the guide ring body (242) and the first enclosure (241) on the horizontal plane is located within the projection range of the oil collecting ring (25) on the horizontal plane.

3. The range hood according to claim 2, characterized in that: The included angle between the tangent line of each point on the portion where the projection of the guide ring body (242) on the horizontal plane is outside the projection of the oil collecting ring (25) on the horizontal plane and the horizontal plane is greater than 8°.

4. The range hood according to claim 2, characterized in that: The oil collecting ring (25) comprises an oil collecting groove (253), a first oil leakage hole (254) is provided on the rear bottom of the oil collecting groove (253), and the first oil leakage hole (254) is located above the oil cup (23); a second oil leakage hole (244) is provided on the front side portion of the first enclosure (241) of the guide ring (24), and the second oil leakage hole (244) is located above the oil collecting groove (253).

5. The range hood according to claim 4, characterized in that: An annular support frame (29) is arranged around the oil collecting ring (25); the bottom surface of the support frame (29) is connected to or integrated with the smoke collecting hood (22); the upper end of the support frame (29) is connected to the bottom surface of the first enclosure (241) of the guide ring (24); and a third oil leakage hole (291) is opened at a position of the support frame (29) corresponding to the second oil leakage hole (244).

6. The range hood according to claim 5, characterized in that: The outer periphery of the first enclosure plate (241) of the guide ring (24) is formed with first retaining edges (243) extending upwards on the front, left and right sides.

7. The range hood according to claim 5, characterized in that: A fourth oil leakage hole (222) is provided at a position adjacent to the support frame (29) on the rear side of the smoke collecting hood (22), and the fourth oil leakage hole (222) is located above the oil cup (23).

8. The range hood according to claim 1, characterized in that: The oil collecting ring (25) comprises an annular second enclosure plate (251) and an oil collecting ring body (252) extending upward from the inner periphery of the second enclosure plate (251); the diameter of the oil collecting ring body (252) gradually decreases from bottom to top; the second enclosure plate (251) and the oil collecting ring body (252) together form an open oil collecting groove (253); the second enclosure plate (251) is provided with a first oil leakage hole (254) at a bottom surface position corresponding to the oil collecting groove (253); the first oil leakage hole (254) is located above the oil cup (23).

9. The range hood according to claim 1, characterized in that: The front side of the oil collecting ring (25) is plugged into the fume collecting hood (22), and the rear side of the oil collecting ring (25) is fixed to the fume collecting hood (22) by magnetic attraction.

10. The range hood according to claim 1, characterized in that: The guide ring (24) comprises an annular first enclosure plate (241) and a guide ring body (242) extending upward from the inner periphery of the first enclosure plate (241); The range hood further comprises an upper box assembly, the upper box assembly comprising an upper box (11), a fan system (12) at least partially arranged in the upper box (11), and an upper oil guide plate (13) arranged below the fan system (12); the upper box (11) is at least partially located above the lower box (21); the projection of the rear end of the upper oil guide plate (13) on a horizontal plane is located on the rear side of the projection of the guide ring body (242) on the horizontal plane.

11. The range hood according to claim 10, characterized in that: The upper oil guide plate (13) comprises an upper oil guide plate body (131) which is gradually inclined downward from front to rear, and a bent portion (132) which is bent upward from the rear end of the upper oil guide plate body (131), and fifth oil leakage holes (134) are formed at the left and right end portions of the bent portion (132).

12. The range hood according to claim 11, characterized in that: The projection of the upper oil guide plate body (131) on the horizontal plane at least covers the projection of the upper end opening of the guide ring body (242) on the horizontal plane.

13. The range hood according to claim 1, characterized in that: The guide ring (24) comprises an annular first enclosure plate (241) and a guide ring body (242) extending upward from the inner periphery of the first enclosure plate (241); The lower box assembly further comprises a lower oil guide plate (26) arranged in the lower box (21), wherein the lower oil guide plate (26) gradually slopes downward from the rear side wall of the lower box (21) to the front, and the front end of the lower oil guide plate (26) is located at the rear side of the guide ring body (242).

14. The range hood according to claim 13, characterized in that: The lower box assembly further comprises a front oil guide plate (27) and a side oil guide plate (28). The front oil guide plate (27) is arranged on the inner side of the front side wall of the lower box (21). The bottom of the front oil guide plate (27) is located on the front side of the guide ring body (242). The side oil guide plates (28) have two and are respectively located on the inner side of the left side wall and the inner side of the right side wall of the lower box (21). The bottom of the lower oil guide plate (26) is formed with a first oil guide groove (261). The bottom of the front oil guide plate (27) is formed with a second oil guide groove (271). A third oil guide groove (281) is formed at the bottom of the plate (28); sixth oil leakage holes (262) are formed at left and right ends of the bottom surface of the first oil guide groove (261); and seventh oil leakage holes (272) are formed at left and right ends of the bottom surface of the second oil guide groove (271); the third oil guide groove (281) is located below the sixth oil leakage hole (262) and the seventh oil leakage hole (272); the bottom surface of the third oil guide groove (281) gradually tilts downward from front to rear; and the rear end of the third oil guide groove (281) is located above the oil cup (23).

15. The range hood according to claim 13 or 14, characterized in that: The outer periphery of the first enclosure (241) of the guide ring (24) is formed with first ribs (243) extending upward on the front, left and right sides, and the rear bottom of the smoke hood (22) is provided with a fourth oil leakage hole (222) for oil on the outer wall of the guide ring (24) to flow through, and the fourth oil leakage hole (222) is located above the oil cup (23).

16. The range hood according to claim 1, characterized in that: The guide ring (24) includes an annular first enclosure (241) and a guide ring body (242) extending upward from the inner periphery of the first enclosure (241), the horizontal spacing between the front end of the upper end of the guide ring body (242) and the front end of the lower end is a, the horizontal spacing between the left end of the upper end of the guide ring body (242) and the left end of the lower end is b, and the horizontal spacing between the right end of the upper end of the guide ring body (242) and the right end of the lower end is b, and the value ranges of a and b are respectively greater than 50 mm.

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