Range hood

Abstract

The utility model provides a range hood which comprises a shell, a volute and an oil guide groove, the volute is provided with an oil guide hole, the oil guide groove is provided with a plurality of subsections, each subsection is internally provided with an oil guide structure, the subsections are connected around the periphery of the lower area of the volute, one subsection is located below the oil outlet hole, and the other subsection is located below the oil outlet hole. At least one segment is connected to the housing. Wherein the subsections located below the oil outlets are used for receiving oil drops dripping from the oil outlets, and due to the fact that each subsection is provided with an oil guide structure, the oil drops flow in the oil guide structures and finally leave the oil guide grooves. Due to the fact that the whole oil guide groove is divided into a plurality of sections, one section is located below the oil outlet hole and receives dripping oil drops, the multiple sections are located on the periphery of the area below the volute, the area, occupied by the oil guide groove, of a main air inlet area below the volute is small, and the influence of the oil guide groove on the air inlet amount of the extractor hood can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a range hood. Background Art

[0002] During the operation of the range hood, the high-temperature oil smoke will liquefy and gather a lot of oil droplets after entering the range hood. The fan volute is the main oil accumulation area. During the rotation of the fan impeller, the oil smoke will liquefy and separate most of the oil, and then deposit at the bottom of the volute. Therefore, a small hole is usually opened at the bottom of the volute as an oil guide hole to discharge the accumulated oil, and an oil guide structure is set outside the volute to prevent oil droplets from falling onto the stove.

[0003] At present, there are two main ideas for designing the oil guide structure under the volute. One is to directly fix the oil guide groove at the bottom of the volute, guide the dripping oil droplets to the range hood case through the oil guide groove, and finally slide to the oil cup to complete the collection. However, since the entire oil guide groove is fixed under the volute, the oil guide groove will block part of the air inlet and affect the air flow. The other is to optimize the existing structure to guide the oil droplets to the oil cup. For example, the oil droplets in the volute directly drip onto the oil receiving rack, and then slide along the wall through multiple air inlet nets and other structures. However, due to the complex structure of this idea, the oil droplets need to pass through a long path, and the oil droplets are easily deposited on the oil receiving rack. At the same time, the double-layer air inlet net also has a great impact on the air intake. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defect in the prior art that the structure guiding oil droplets in the range hood affects the air intake volume, and to provide a range hood.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A range hood comprises a shell and a volute, wherein the volute is provided with an oil outlet hole, and the range hood further comprises an oil guide groove, wherein the oil guide groove comprises a plurality of segments, wherein the plurality of segments are connected around the periphery of an area below the volute, and each of the segments is provided with an oil guide structure; one of the segments is located below the oil outlet hole, and at least one of the segments is connected to the volute or the shell.

[0007] The oil guide groove is divided into several sections, each section has an oil guide structure, and several sections are connected around the periphery of the area below the volute, so as to avoid the entire oil guide groove being arranged below the volute, thereby reducing the influence of the oil guide groove on the air intake volume. At the same time, one of the sections is located below the oil outlet hole, thereby ensuring that oil droplets drip from the oil outlet hole into the oil guide groove. At least one section is connected to the volute or the shell to fix the entire oil guide groove. The oil guide structure can make the route of oil droplets more concentrated during the flow process, thereby reducing the possibility of oil droplets sticking to the oil guide groove.

[0008] Preferably, a plurality of the segments are connected to form a "U" shape, a semicircle, a rectangle with one side open, or a polygon with one side open.

[0009] By connecting the segments into a "U" shape, a semicircle, a rectangle with one side open, or a polygon with one side open, oil droplets can flow out from the end of the oil guide groove. The edges of the "U" shape, semicircle, rectangle or polygon can avoid the area under the volute as much as possible, further reducing the impact on the air intake.

[0010] Preferably, a plurality of the segments are connected to form a rectangle with an open rear side, and the two segments located on the left and right sides are defined as first segments. The first segment is provided with a baffle, and the baffle protrudes upward relative to the first segment.

[0011] By arranging a baffle on the first segment, the fluid entering the range hood is rectified, so that the fluid can flow more evenly, the flow resistance can be reduced, and the fan efficiency can be improved.

[0012] Preferably, the baffle is arranged to be inclined from bottom to top toward the middle.

[0013] By setting the baffle to be inclined from bottom to top toward the middle, the fluid entering the range hood from both sides of the air inlet of the range hood can be better guided to flow into the volute, thereby further improving the fan efficiency.

[0014] Preferably, a connecting structure for connecting to the housing is provided on the first segment, and the connecting structure is connected to the oil guiding structure.

[0015] The connection structure is provided on the two first sections to connect the housing and the oil guide groove, which is more stable than connecting the housing with one of the sections of the oil guide groove.

[0016] Preferably, an oil leakage hole is provided on the connecting structure.

[0017] By arranging the oil leakage hole on the connecting structure, the oil droplets in the oil guide groove can leave the oil guide groove through the oil leakage hole.

[0018] Preferably, the connection structure comprises a first part and a second part which are connected to each other, the first part is connected to the oil guide structure, and the second part is bent downward to fit the shell.

[0019] By bending the second portion of the connecting structure downward to fit the shell, the connection between the connecting structure and the shell is made more convenient.

[0020] Preferably, the segment below the oil outlet hole is defined as a second segment, and the front side of the second segment is bent upward to the front of the volute.

[0021] By arranging the second section below the oil outlet to bend the front side upward to the front of the volute, the second section has a guiding effect on the fluid between the volute and the second section, promoting this part of the fluid to flow to the front of the volute and enter the volute.

[0022] Preferably, the front end of the second segment is connected to the volute.

[0023] By connecting the second section to the volute, the oil guide groove is fixed more firmly in the range hood.

[0024] Preferably, the oil guide groove includes two first segments, a second segment and a third segment, the two first segments are respectively connected to the two ends of the third segment, the second segment is connected to the middle position of the third segment, the second segment is arranged below the oil outlet hole, and the first segment and the second segment are located on both sides of the third segment.

[0025] The technical solution provides a specific solution in which an oil guide groove is connected around the periphery of the area below the volute, and oil drops onto the second segment and is diverted through the third segment, and then flows to the first segment and leaves the oil guide groove.

[0026] The positive progressive effect of the utility model is that the oil guide groove is divided into several sections, each section has an oil guide structure, and several sections are connected around the periphery of the area below the volute, so as to avoid the entire oil guide groove being arranged below the volute, thereby reducing the influence of the oil guide groove on the air intake volume. At the same time, one of the sections is located below the oil outlet hole, so as to ensure that oil droplets drip from the oil outlet hole into the oil guide groove. At least one section is connected to the volute or the shell to fix the entire oil guide groove. The oil guide structure can make the route of oil droplets more concentrated during the flow process, thereby reducing the possibility of oil droplets sticking to the oil guide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The figure is a partial structural diagram of a range hood according to a preferred embodiment of the utility model.

[0028] Figure 2 for Figure 1 A is an enlarged schematic diagram.

[0029] Figure 3 The figure is a three-dimensional structural diagram of a volute and an oil guide groove according to a preferred embodiment of the utility model.

[0030] Figure 4 The figure is a side view schematic diagram of a volute and an oil guide groove of a preferred embodiment of the utility model.

[0031] Figure 5 A schematic diagram of the three-dimensional structure of an oil guide groove of a preferred embodiment of the utility model

[0032] Description of reference numerals:

[0033] Shell 1

[0034] Snail 2

[0035] Oil outlet 21

[0036] Oil guide groove 3

[0037] Section 1 31

[0038] Baffle 311

[0039] Connection structure 312

[0040] Oil guide structure 313

[0041] Second Section 32

[0042] Section 33 DETAILED DESCRIPTION

[0043] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0044] like Figure 1-Figure 5 As shown, this embodiment provides a range hood, which includes a housing 1, a volute 2 and an oil guide groove 3. The volute 2 has an oil guide hole, and the oil guide groove 3 has four sections, each of which is provided with an oil guide structure 313, wherein three sections are connected around the periphery of the lower area of ​​the volute 2, one section is located below the oil outlet hole 21, and two of the sections around the periphery of the lower area of ​​the volute 2 are connected to the housing 1. The section located below the oil outlet hole 21 is used to catch the oil droplets dripping from the oil outlet hole 21. Since each section is provided with an oil guide structure 313, the oil droplets flow in the oil guide structure 313 and finally leave the oil guide groove 3. Since the entire oil guide groove 3 is divided into four sections, and three of the sections are located around the periphery of the lower area of ​​the volute 2, and only one section is provided below the oil outlet hole 21, the area occupied by the oil guide groove 3 in the main air inlet area below the volute 2 is small, which can reduce the influence of the oil guide groove 3 on the air intake of the range hood.

[0045] Specifically, if Figure 5 As shown, the oil guide structure 313 has a concave channel, and the oil droplets in the oil guide groove 3 are mainly concentrated at the oil guide structure 313, that is, the oil droplets flow from the concave channel, so that the flow path of the oil droplets on the oil guide groove 3 is concentrated on the oil guide structure 313, reducing the possibility of the oil droplets sticking to the oil guide groove 3.

[0046] In this embodiment, the segmented connection surrounding the bottom of the volute 2 forms a rectangle with one side open to avoid the area below the volute 2 and reduce the influence of the oil guide groove 3 on the air intake. The one-side opening is set to allow oil droplets to leave from the end of the oil guide groove 3 to avoid oil droplets circulating on the oil guide groove 3.

[0047] Of course, in other embodiments, the segments surrounding the volute 2 can also form a "U" shape, a semicircle, or a polygon with one side open, etc. As long as the oil guide groove 3 avoids the area below the volute 2 as much as possible, the impact on the air intake of the range hood can be reduced. When the segments surrounding the volute 2 form a "U" shape and a semicircle, the entire oil guide groove 3 can be provided with only two segments. When the segments surrounding the volute 2 form a polygon with one side open, the number of segments of the entire oil guide groove 3 is equal to the number of sides of the polygon, which will not be repeated here.

[0048] In this embodiment, if Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the oil guide groove 3 is divided into two first segments 31, a second segment 32 and a third segment 33, wherein the two first segments 31 refer to two segments located on the left and right sides of the oil guide groove 3, the second segment 32 refers to a segment located below the oil outlet 21, and the third segment 33 connects the two first segments 31 and the second segment 32. Specifically, the two first segments 31 are respectively connected to the two ends of the third segment 33, the second segment 32 is connected to the middle position of the third segment 33, and the first segment 31 and the second segment 32 are located at the front and rear sides of the third segment 33, wherein the first segment 31 is at the rear side and the second segment 32 is at the front side. After the oil droplets drip from the oil outlet 21 to the second segment 32, they are diverted to the first segment 31 through the third segment 33 and then leave the oil guide groove 3. Figure 5 The arrows in FIG. 3 indicate the flow path of the oil droplets on the oil guide groove 3 .

[0049] In this embodiment, if Figure 4 and Figure 5 As shown, a baffle 311 is provided on the first segment 31, and the baffle 311 protrudes upward relative to the first segment 31. By providing the baffle 311 on the first segment 31, the fluid entering the range hood is rectified, so that the fluid flow can be more uniform, the flow resistance can be reduced, and the fan efficiency can be improved. Specifically, the baffle 311 is used to separate the fluid entering the range hood from different positions of the air inlet, reduce the mutual collision between the fluid entering from the left and right sides and the fluid entering from the middle, and avoid the formation of vortices in the area adjacent to the volute 2.

[0050] In this embodiment, the baffle 311 on the first segment 31 is inclined from bottom to top toward the middle, so as to better guide the fluid entering the range hood from both sides of the air inlet of the range hood to flow into the volute 2, further improving the fan efficiency.

[0051] In this embodiment, if Figure 1 , Figure 2 and Figure 5As shown, a connection structure 312 for connecting to the housing 1 is provided at the end of the first segment 31, and the connection structure 312 is connected to the oil guide structure 313 on the first segment 31. By providing a connection structure 312 at each end of the two first segments 31 to connect to the housing 1 to fix the oil guide groove 3, the connection between the oil guide groove 3 and the housing 1 is more reliable.

[0052] Specifically, if Figure 3 , Figure 4 and Figure 5 As shown, each connection structure 312 has a first part and a second part connected to each other, the first part is connected to the oil guide structure 313, and the second part is bent downward to fit the housing 1. In this embodiment, the thickness of the oil guide groove 3 is relatively thin, and the oil guide groove 3 is integrally formed. The connection between the connection structure 312 and the main body of the oil guide groove 3 is relatively reliable. At the same time, by bending the connection structure 312 so that the connection structure 312 is bent to fit the housing 1 and then connected to the housing 1, the fitting area between the housing 1 and the connection structure 312 is increased, making the connection between the housing 1 and the connection structure 312, that is, the connection between the housing 1 and the oil guide groove 3, more convenient and more reliable. The housing 1 and the connection structure 312 are locked with self-tapping screws.

[0053] Meanwhile, in this embodiment, if Figure 1 and Figure 3 As shown, the first part of the connecting structure 312 has an oil leakage hole. The oil droplets flow in the concave channel of the oil guide structure 313 to the end of the first segment 31 and then flow to the connecting structure 312, and then leave the oil guide groove 3 from the oil leakage hole and enter the oil cup or other temporary oil storage structure.

[0054] In this embodiment, if Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the second segment 32 is located below the oil outlet 21, and the front side of the second segment 32 is curved upward to the front of the volute 2. By bending the front side of the second segment 32 upward to the front of the volute 2, on the one hand, the front side of the second segment 32 is higher than the rear side, and the third segment 33 and the first segment 31 are both on the rear side of the second segment 32. The lower rear side of the second segment 32 is conducive to the flow of oil droplets to the rear side. On the other hand, the front of the volute 2 is the air inlet for the fluid to enter the volute 2. Bending the front side of the second segment 32 upward to the front of the volute 2 is conducive to guiding the fluid below the volute 2 to the front of the volute 2 through the second segment 32, reducing the fluid retained below the volute 2 and increasing the air intake of the range hood.

[0055] Meanwhile, in this embodiment, if Figure 3 and Figure 4As shown, the front end of the second segment 32 is connected to the volute 2, that is, the highest end of the second segment 32 is connected to the volute 2, so that the entire oil guide groove 3 is fixed more firmly in the range hood.

[0056] In this embodiment, if Figure 1 , Figure 3 and Figure 4 As shown, the first section 31 of the oil guide groove 3 is also arranged to be inclined downward from the front to the back, which is conducive to the oil droplets flowing to the end of the first section 31 and leaving the oil guide groove.

[0057] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A range hood, comprising a housing and a volute, wherein the volute has an oil outlet, characterized in that: It includes an oil guide groove, which includes several segments, and the several segments are connected around the periphery of the area below the volute, and each of the segments has an oil guide structure; one of the segments is located below the oil outlet, and at least one of the segments is connected to the volute or the shell.

2. The range hood according to claim 1, characterized in that: Several of the segments are connected to form a "U" shape, a semicircle, a rectangle with one side open, or a polygon with one side open.

3. The range hood according to claim 1, characterized in that: A plurality of the segments are connected to form a rectangle with an open rear side, and the two segments located on the left and right sides are defined as first segments. The first segment is provided with a baffle, and the baffle protrudes upward relative to the first segment.

4. The range hood according to claim 3, characterized in that: The baffle is arranged to be inclined from bottom to top toward the middle.

5. The range hood according to claim 3, characterized in that: The first segment is provided with a connection structure for connecting the housing, and the connection structure is connected to the oil guide structure.

6. The range hood according to claim 5, characterized in that: The connecting structure is provided with an oil leakage hole.

7. The range hood according to claim 5, characterized in that: The connection structure comprises a first part and a second part connected to each other, the first part is connected to the oil guide structure, and the second part is bent downward to fit the shell.

8. The range hood according to claim 1, characterized in that: The segment below the oil outlet hole is defined as a second segment, and the front side of the second segment is bent upward to the front of the volute.

9. The range hood according to claim 8, characterized in that: The front end of the second segment is connected to the volute.

10. The range hood according to claim 1, characterized in that: The oil guide groove includes two first segments, a second segment and a third segment, the two first segments are respectively connected to the two ends of the third segment, the second segment is connected to the middle position of the third segment, the second segment is arranged below the oil outlet hole, and the first segment and the second segment are located on both sides of the third segment.

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