Range hood

Abstract

The utility model discloses a range hood which comprises an exhaust fume collecting hood provided with a first exhaust fume suction port; a second smoke suction opening is formed in the bottom of the smoke inlet box, the smoke inlet box has a first state and a second state, in the first state, at least part of the smoke inlet box is contained in the smoke collecting hood, and at least part of the first smoke suction opening and at least part of the second smoke suction opening are overlapped; in a second state, the smoke inlet box extends out relative to the smoke collecting hood, a first smoke inlet cavity is formed in the smoke collecting hood, the first smoke suction port forms a smoke inlet of the first smoke inlet cavity, a second smoke inlet cavity is formed in the smoke inlet box, the second smoke suction port forms a smoke inlet of the second smoke inlet cavity, and the first smoke inlet cavity is in fluid communication with the second smoke inlet cavity; the fume collecting hood and the fume inlet box form a fume collecting unit, in the second state, the depth size of the fume collecting unit is a, in the first state, the depth size of the fume collecting unit is b, and a is larger than 1.25 b; the exhaust fume collecting hood comprises a flow guide part, the flow guide part is provided with a flow guide face, and the included angle alpha between the flow guide face and the vertical plane is smaller than 45 degrees.

Description

Technical Field

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

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. It can quickly remove waste from the stove and fumes produced during cooking and exhaust them outdoors, reducing pollution and purifying the air.

[0003] Traditional range hoods often have fixed smoke inlets, making it difficult to balance effective smoke extraction with ease of use. For example, Chinese utility model patent application number 202021678848.7 discloses a range hood with a housing, a vertically extending smoke inlet chamber at the bottom, and a smoke inlet on the front side wall of the lower part of the housing communicating with this chamber. This fixed structure is installed low, making it prone to collision with cookware during use. Another example is a range hood disclosed in Chinese patent application number 201921762642.X, which includes: a flue shell with a smoke inlet, a smoke outlet, and a flue connecting the inlet and outlet; and a smoke collection hood located below the flue shell, having a smoke collection chamber and a smoke passage corresponding to the smoke inlet communicating with the chamber. This fixed structure is installed high, leading to smoke leakage and poor smoke extraction during use.

[0004] Therefore, further improvements are needed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a range hood that can ensure the smoke extraction effect and the operating space for cookware even in a high installation position, in order to overcome the shortcomings of the existing technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a range hood, comprising:

[0007] A fan frame, wherein a fan system is internally installed, the fan system including a fan; and

[0008] A smoke collection hood, connected to the fan frame, is provided with a first smoke inlet; characterized in that:

[0009] The range hood also includes a smoke inlet box, which is connected to a smoke collection hood. A second smoke inlet is located at the bottom of the smoke inlet box. The smoke inlet box has a first state and a second state depending on its relative position to the smoke collection hood: In the first state, the smoke inlet box is at least partially housed within the smoke collection hood, and the first smoke inlet and the second smoke inlet at least partially overlap to form a smoke inlet; In the second state, the smoke inlet box extends relative to the smoke collection hood, forming a first smoke inlet cavity within the smoke collection hood, with the first smoke inlet constituting the smoke inlet of the first smoke inlet cavity, and the smoke inlet box forming a second smoke inlet cavity, with the second smoke inlet constituting the smoke inlet of the second smoke inlet cavity, and the first smoke inlet cavity and the second smoke inlet cavity being in fluid communication.

[0010] The smoke collection hood and the smoke inlet box constitute a smoke collection unit. In the second state, the depth dimension of the smoke collection unit is a, and in the first state, the depth dimension of the smoke collection unit is b, and a > 1.25b.

[0011] The smoke collection hood includes a flow guide, an oil cup is installed at the bottom of the flow guide, the flow guide has a flow guide surface, the angle between the flow guide surface and the vertical plane is α, and α < 45°.

[0012] By setting up a smoke inlet box that moves relative to the smoke collection hood, the range hood can have two smoke extraction states for different working conditions to meet different needs. In the second state, it can provide a larger smoke collection chamber volume and a greater smoke collection depth. By setting up a guide section with a guide surface that extends upward from the oil cup, the oil fumes can come into contact with the guide surface when they rise and be guided to each smoke inlet. Furthermore, the tilt angle of the guide surface makes it difficult for oil fumes to adhere to the guide surface, avoiding inconvenience in cleaning.

[0013] Furthermore, to facilitate the setting of the first smoke inlet, the smoke collection hood has a stepped surface, the first smoke inlet is set on the stepped surface, and the guide surface is connected to the stepped surface.

[0014] Furthermore, in the second state, the minimum distance between the first smoke inlet and the second smoke inlet in the height direction is H, and H > 10 mm. Therefore, when the oil fumes impact the step surface, they are more easily absorbed by the second smoke inlet and are less likely to escape directly.

[0015] Furthermore, the smoke inlet box also has a smoke gathering plate, which is located outside the second smoke inlet, and the lower end of the smoke gathering plate is not higher than the step surface. When the oil fumes impact the step surface, they can be blocked by the smoke gathering plate and will not easily escape directly.

[0016] Furthermore, the maximum dimension of the guide portion in the depth direction of the range hood is c, and c < 1 / 2a; in the second state, the first and second smoke inlets constitute a smoke-absorbing area, and the maximum dimension of the smoke-absorbing area in the depth direction of the range hood is d, and d / a > 0.4. This provides a larger smoke-absorbing area, which is closer to the outer edge, thus reducing the escape of cooking fumes.

[0017] Furthermore, the smoke inlet box has a top surface, and the smoke collection hood has a back surface. In the first state, a gap is formed between the top surface of the smoke inlet box and the back surface of the smoke collection hood, and a smoke inlet channel is formed between the fan and the fan frame. When the gap is projected vertically onto the location of the smoke inlet channel, the gap falls entirely within the range defined by the smoke inlet channel in the depth direction, thereby forming direct suction and direct discharge, which facilitates the flow of oil fumes from the smoke collection hood to the fan frame and their intake.

[0018] Furthermore, the smoke inlet box has a top surface, and the smoke collection hood has a back surface. In the first state, a gap is formed between the top surface of the smoke inlet box and the back surface of the smoke collection hood. The depth dimension of the gap is e, and the depth dimension of the smoke collection hood is f, and the condition e / f > 0.1 is met, thereby avoiding excessive noise caused by an excessively small gap.

[0019] Furthermore, the first smoke inlet has at least two and is spaced apart in the width direction of the smoke collection hood. The distance between the first smoke inlet and the last smoke inlet in the width direction of the smoke collection hood is d1, and the width of the smoke collection hood is d2, satisfying d1 / d2≥80%, thereby providing a larger lateral smoke collection width.

[0020] Furthermore, the second smoke inlet has at least two and is spaced apart in the width direction of the smoke inlet box. The distance between the first and last second smoke inlet in the width direction of the smoke inlet box is d3, the width of the smoke inlet box is d4, and d3 / d4≥80% is satisfied, thereby providing a larger lateral smoke gathering width.

[0021] Compared with the prior art, the advantages of this utility model are as follows: by setting a smoke inlet box that is movable relative to the smoke collection hood, the range hood can have two smoke extraction states for two different working conditions to meet different needs. In the second state, it can provide a larger smoke collection chamber volume and a larger smoke collection depth. By setting a guide part with a guide surface that extends upward from the oil cup, the oil fumes can come into contact with the guide surface when they rise and be guided to each smoke inlet. Furthermore, the tilt angle of the guide surface makes it difficult for oil fumes to adhere to the guide surface, avoiding inconvenience in cleaning. Attached Figure Description

[0022] Figure 1This is a three-dimensional structural diagram (second state) of the range hood according to an embodiment of the present utility model;

[0023] Figure 2 This is a side view (second state) of the range hood according to an embodiment of the present utility model;

[0024] Figure 3 This is a side sectional view (second state) of the range hood according to an embodiment of the present utility model;

[0025] Figure 4 This is a bottom view (second state) of the range hood according to an embodiment of the present utility model;

[0026] Figure 5 This is a side view (first state) of the range hood according to an embodiment of the present utility model;

[0027] Figure 6 This is a side sectional view (first state) of the range hood according to an embodiment of the present utility model. Detailed Implementation

[0028] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0030] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0031] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0032] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0033] The specific angles, heights, widths, and other values ​​given in the following detailed embodiments are all measured in accordance with the specific accompanying drawings.

[0034] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0035] See Figures 1-4 A range hood includes a smoke collection hood 1 and a fan frame 2. The fan frame 2 is connected to the smoke collection hood 1, and a fan system is installed inside the fan frame 2. The fan system includes a fan 3. The fan 4 may have an air inlet 41 facing the rear, and a smoke inlet channel 42 is formed between the fan 4 and the rear side of the fan frame 2.

[0036] The fume hood 1 is provided with a first smoke inlet 11. Oil fumes are drawn into the fume hood 1 through the first smoke inlet 11, then rise into the fan frame 2, and are discharged to the outside of the range hood by the fan 4. There are at least two first smoke inlets 11, spaced apart along the width direction of the fume hood 1 (relative to the user, in the left-right direction of the range hood). The first to last smoke inlets 11 along the width direction of the fume hood 1... Figure 4 The distance between the left edge of the leftmost first smoke inlet 11 and the right edge of the rightmost first smoke inlet 11 shown in the figure is d1, and the width of the smoke collection hood 1 is d2, and d1 / d2≥80% is satisfied to ensure sufficient lateral smoke collection width.

[0037] The smoke hood 1 also has a guide section 13, with an oil cup 5 installed at the bottom of the guide section 13. The guide section 13 has a guide surface 131. The guide section 13 is located below the first smoke inlet 11, and the front surface of the guide section 13 facing the user is configured as the guide surface 131 described above to guide the oil fumes towards the smoke inlet (described in detail below). The guide surface 131 is an inclined plane with an angle α to the vertical plane, and α < 45°, so that the oil fumes do not easily adhere to the guide surface 131.

[0038] The smoke hood 1 also has a stepped surface 14, on which a first smoke inlet 11 is disposed, and a guide surface 131 is connected to the stepped surface 14. The stepped surface 14 can extend forward from the upper end of the guide surface 131 to form a step and provide the first smoke inlet 11.

[0039] The range hood also includes a smoke inlet box 3, which is movably connected to the smoke collection hood 1, such as being able to move back and forth relative to the smoke collection hood 1. A second smoke inlet 31 is provided at the bottom of the smoke inlet box 3. There are at least two second smoke inlets 31, which are spaced apart along the width direction of the smoke inlet box 3. The first to last second smoke inlet 31 along the width direction of the smoke inlet box 3 (… Figure 4 The distance between the left edge of the leftmost second smoke inlet 31 and the right edge of the rightmost second smoke inlet 31 shown is d3, the width of the smoke inlet box 3 is d4, and d3 / d4≥80% is satisfied to ensure sufficient lateral smoke collection width.

[0040] To facilitate the installation of the smoke inlet box 3, the smoke collection hood 1 may have at least a partial opening 12 above the first smoke inlet 11, so that the smoke inlet box 3 can be inserted into the smoke collection hood 1 through the opening 12. The smoke collection hood 1 and the smoke inlet box 3 together constitute a smoke collection unit. The rear side of the smoke inlet box 3 inside the smoke collection hood 1 may be open to allow fluid communication between the smoke inlet box 3 and the smoke collection hood 1.

[0041] Since the smoke inlet box 3 can move back and forth relative to the smoke collection hood 1, it has a first state and a second state. Whether in the first state or the second state, the range hood can complete smoke extraction. See the first state section. Figure 5 and Figure 6 At this time, the smoke inlet box 3 is at least partially housed within the smoke collection hood 1, and the first smoke inlet 11 and the second smoke inlet 31 at least partially overlap (in this embodiment, vertically), so that the overlapping portion forms the smoke inlet. In the second state, see... Figures 1-4The smoke inlet box 3 extends forward relative to the smoke collection hood 1. The smoke collection hood 1 contains a first smoke inlet chamber Q1, and a first smoke inlet 11 forms the smoke inlet of the first smoke inlet chamber Q1. The smoke inlet box 3 contains a second smoke inlet chamber Q2, and a second smoke inlet 31 forms the smoke inlet of the second smoke inlet chamber Q2. The first smoke inlet chamber Q1 and the second smoke inlet chamber Q2 are in fluid communication. In the first state, the depth dimension of the smoke collection unit (relative to the user in the front-back direction) is b. In the second state, the depth dimension of the smoke collection unit is a, satisfying a > 1.25b, to provide a larger smoke collection chamber volume and smoke collection depth in the second state.

[0042] In the second state, the second smoke inlet 31 is higher than the first smoke inlet 11 and located in front of the first smoke inlet 11. The minimum distance (vertical distance) between the first smoke inlet 11 and the second smoke inlet 31 in the height direction is H, and H > 10 mm. Therefore, after the fumes impact the stepped surface 14, some of the fumes that have changed their path are more easily absorbed by the second smoke inlet 31 and are less likely to escape directly. The maximum dimension of the guide portion 13 in the depth direction of the range hood is c, and c < 1 / 2a. In the second state, the first smoke inlet 11 and the second smoke inlet 31 constitute a smoke extraction area, whose maximum dimension in the depth direction of the range hood is d, and d / a > 0.4. This allows the smoke extraction area to be larger and more outward (i.e., in front) in the second state.

[0043] The smoke inlet box 3 also has a top surface 32, and the smoke collection hood 1 also has a back surface 15. In the first state, a gap Q3 is formed between the top surface 32 of the smoke inlet box 3 and the back surface 32 of the smoke collection hood 1 to allow oil fumes to pass through and enter the fan frame 2. The dimension of the gap Q3 in the depth direction is e, and the dimension of the smoke collection hood 1 in the depth direction is f, and e / f > 0.1 is satisfied to prevent the gap from being too small and generating large noise. When the gap 3 is projected vertically onto the location of the smoke inlet channel 42 (projection direction see...), Figure 6 The arrow F shown in the figure falls entirely within the area defined by the smoke inlet channel 42 in the depth direction.

[0044] The smoke inlet box 3 also has a smoke gathering plate 33, which is located on the outside (front side) of the second smoke inlet 31, and the lower end of the smoke gathering plate 33 is not higher than the position of the first smoke inlet 11 (step surface 14) to further prevent the oil fumes from escaping.

[0045] The term "fluid connectivity" as used in this utility model refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. The third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

Claims

1. A range hood, comprising: A fan frame (2) is provided inside which a fan system is installed, the fan system including a fan (4); as well as A smoke hood (1) is connected to the fan frame (2), and the smoke hood (1) is provided with a first smoke inlet (11); characterized in that: The range hood also includes a smoke inlet box (3), which is connected to the smoke collection hood (1). The bottom of the smoke inlet box (3) is provided with a second smoke inlet (31). The smoke inlet box (3) has a first state and a second state depending on its relative position to the smoke collection hood (1): In the first state, the smoke inlet box (3) is at least partially housed in the smoke collection hood (1), and the first smoke inlet (11) and the second smoke inlet (31) at least partially overlap to form a smoke inlet; In the second state, the smoke inlet box (3) extends relative to the smoke collection hood (1), the smoke collection hood (1) forms a first smoke inlet cavity (Q1), the first smoke inlet (11) forms the smoke inlet of the first smoke inlet cavity (Q1), the smoke inlet box (3) forms a second smoke inlet cavity (Q2), the second smoke inlet (31) forms the smoke inlet of the second smoke inlet cavity (Q2), and the first smoke inlet cavity (Q1) and the second smoke inlet cavity (Q2) are in fluid communication. The smoke collection hood (1) and the smoke inlet box (3) constitute a smoke collection unit. In the second state, the depth dimension of the smoke collection unit is a, and in the first state, the depth dimension of the smoke collection unit is b, and a > 1.25b. The smoke collection hood (1) includes a flow guide (13), an oil cup (5) is installed at the bottom of the flow guide (13), the flow guide has a flow guide surface (131), the angle between the flow guide surface (131) and the vertical plane is α, and α < 45°.

2. The range hood according to claim 1, characterized in that: The smoke hood (1) has a stepped surface (14), the first smoke inlet (11) is disposed on the stepped surface (14), and the guide surface (131) is connected to the stepped surface (14).

3. The range hood according to claim 2, characterized in that: In the second state, the minimum distance between the first smoking port (11) and the second smoking port (31) in the height direction is H, and H > 10 mm.

4. The range hood according to claim 2, characterized in that: The smoke inlet box (3) also has a smoke gathering plate (33), which is located outside the second smoke inlet (31), and the lower end of the smoke gathering plate (33) is not higher than the step surface (14).

5. The range hood according to claim 1, characterized in that: The maximum dimension of the guide section (13) in the depth direction of the range hood is c, and c < 1 / 2a; in the second state, the first smoke inlet (11) and the second smoke inlet (31) constitute a smoke area, and the maximum dimension of the smoke area in the depth direction of the range hood is d, and d / a > 0.

4.

6. The range hood according to claim 1, characterized in that: The smoke inlet box (3) has a top surface (32), and the smoke collection hood (1) has a back surface (15). In the first state, a gap (Q3) is formed between the top surface (32) of the smoke inlet box (3) and the back surface (15) of the smoke collection hood (1). A smoke inlet channel (42) is formed between the fan (4) and the fan frame (2). When the gap (Q3) is projected vertically onto the location of the smoke inlet channel (42), the gap (Q3) falls entirely within the range defined by the smoke inlet channel (42) in the depth direction.

7. The range hood according to claim 1, characterized in that: The smoke inlet box (3) has a top surface (32), and the smoke collection hood (1) has a back surface (15). In the first state, a gap (Q3) is formed between the top surface (32) of the smoke inlet box (3) and the back surface (15) of the smoke collection hood (1). The depth dimension of the gap (Q3) is e, the depth dimension of the smoke collection hood (1) is f, and e / f > 0.

1.

8. The range hood according to claim 1, characterized in that: The first smoke inlet (11) has at least two and is arranged at intervals in the width direction of the smoke collection hood (1). The distance between the first first smoke inlet (11) and the last first smoke inlet (11) in the width direction of the smoke collection hood (1) is d1, the width of the smoke collection hood (1) is d2, and d1 / d2≥80% is satisfied.

9. The range hood according to claim 1, characterized in that: The second smoke inlet (31) has at least two and is spaced apart in the width direction of the smoke inlet box (3). The distance between the first second smoke inlet (31) and the last second smoke inlet (31) in the width direction of the smoke inlet box (3) is d3. The width of the smoke inlet box (3) is d4, and d3 / d4≥80% is satisfied.

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