Air inlet flow guide assembly and range hood with same

Abstract

The air inlet flow guide assembly is arranged in a smoke collecting cavity of the range hood and comprises a flow guide block, a flow guide plate, a flow guide plate, a flow guide plate, a flow guide plate, a flow guide plate and a flow guide plate, the flow guide plate is provided with a first flow guide face and a second flow guide face, the first flow guide face is obliquely arranged forwards from bottom to top, and the second flow guide face is obliquely arranged backwards from bottom to top; the flow guide plate is arranged above the flow guide block, the flow guide plate is provided with a third flow guide face, the third flow guide face is obliquely arranged backwards from top to bottom, and a flow guide channel is formed between the flow guide plate and the second flow guide face; compared with the prior art, when the air inlet flow guide assembly is connected to the back plate of the smoke collecting cavity of the range hood, air flow can be prevented from directly impacting the back plate so as to reduce impact noise of the air flow, and the situation that the air flow in the smoke collecting cavity is disordered due to turbulent flow formed after the air flow directly impacts the back plate is also avoided; therefore, the resistance of the back plate of the smoke collecting cavity to the flowing of air to the air suction side of the smoke exhaust fan is greatly reduced, and the oil smoke suction capacity of the range hood is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, and in particular to an air inlet guide component and a range hood having the same. Background Art

[0002] In the prior art, when the smoke exhaust fan of the range hood is started, when the external oil smoke enters the air collecting chamber through the air suction port, its flow direction is toward the back plate of the air collecting chamber. The air flow entering through the air suction port will directly collide with the back plate of the air collecting chamber, generating a large noise. After the air flow collides with the back plate, part of the air flow flows upward along the back plate, and part flows downward along the back plate. The downward-flowing air flow will disturb the air flow at the air suction port when it flows back, affecting the ability of the smoke exhaust fan to extract oil smoke. Utility Model Content

[0003] The purpose of the utility model is to provide an air inlet guide component and a range hood having the same, which are used to solve the above-mentioned technical problems.

[0004] An air inlet guide assembly is arranged in a smoke collecting chamber of a range hood, comprising:

[0005] The guide block has a first guide surface and a second guide surface, the first guide surface is arranged to be inclined forward from bottom to top, and the second guide surface is arranged to be inclined backward from bottom to top;

[0006] The guide plate is arranged above the guide block, and has a third guide surface on the guide plate. The third guide surface is arranged to tilt backward from top to bottom, and a guide channel is formed between the guide plate and the second guide surface.

[0007] According to an embodiment of the present utility model, the first guide surface and the second guide surface are both cambered surfaces, and a transition surface is provided between the upper edge of the first guide surface and the lower edge of the second guide surface, and the transition surface is a cambered surface.

[0008] According to an embodiment of the present utility model, the surface of the guide plate opposite to the second guide surface is a curved surface.

[0009] According to an embodiment of the present utility model, the guide plate includes an arc segment and a vertical segment, and the vertical segment is formed by extending upward from the upper edge of the arc segment.

[0010] According to one embodiment of the utility model, it also includes a support block, which is arranged on the second guide surface and is used to connect the guide plate above the second guide surface of the guide block.

[0011] According to an embodiment of the present invention, there are multiple support blocks, and the multiple support blocks are evenly distributed on the second guide surface and divide the guide channel into at least two parts.

[0012] According to one embodiment of the utility model, the shape of the surface of the support block and the guide plate opposite to each other is adapted to the surface of the guide plate connected to it, and the wall surfaces on both sides of the support block include a vertical surface and arc-shaped surfaces located on the upper and lower sides of the vertical surface, and the inlet of the part of the guide channel located between the two support blocks is in a contracted shape, and the outlet is in a flared shape.

[0013] A range hood adopts the above-mentioned air inlet guide assembly, including a range hood main body, the range hood main body has a smoke collecting chamber and an air suction port connected to the smoke collecting chamber, a smoke exhaust fan is provided in the smoke collecting chamber, the smoke exhaust fan is located above the air suction port, the guide block is connected to the back plate of the smoke collecting chamber, and the air suction port is facing the guide channel and the third guide surface.

[0014] According to one embodiment of the present invention, the upper edge of the first guide surface is located below the air suction port.

[0015] According to one embodiment of the utility model, the smoke exhaust fan is arranged to tilt backward from bottom to top, with its air suction side facing the back plate of the smoke collecting chamber.

[0016] Compared with the prior art, the air inlet guide assembly of the utility model has the following advantages:

[0017] The air inlet guide component of the utility model, when connected to the back plate of the smoke collecting chamber of the range hood, can disperse and guide the air that flows toward the back plate after entering the smoke collecting chamber from the air suction port. The air inlet guide component can divide the air flow into two streams, one of which flows upward along the guide channel and the third guide surface, and the other flows downward along the first guide surface. In this way, the air flow can be prevented from directly impacting the back plate to reduce the air flow impact noise, and the turbulence formed after the air flow directly impacts the back plate, resulting in air flow disorder in the smoke collecting chamber, thereby greatly reducing the resistance of the back plate of the smoke collecting chamber to the air flow flowing toward the suction side of the smoke exhaust fan, thereby improving the range hood's ability to extract oil smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the air inlet guide assembly of the utility model;

[0019] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 It is a cross-sectional view of the air inlet guide assembly of the utility model;

[0021] Figure 4 It is a cross-sectional view of the air inlet guide assembly of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the range hood of the utility model;

[0023] Figure 6It is a cross-sectional view of the range hood of the utility model;

[0024] Figure 7 for Figure 6 A partial enlarged view of point B in the middle.

[0025] In the figure: 1. guide block, 11. first guide surface, 12. second guide surface, 13. transition surface, 2. guide plate, 21. third guide surface, 2a. arc segment, 2b. vertical segment, 3. support block, 4. range hood body, 41. smoke collecting chamber, 42. air intake port, 5. smoke exhaust fan.

[0026] The realization of the functions and advantages of the utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0031] The range hood is arranged above the kitchen stove and is used to extract and discharge the oil smoke generated during the cooking process when the user cooks food. The range hood has a panel, on which is provided an air intake port connected to the exhaust port of the range hood, and an exhaust fan is provided between the exhaust port and the air intake port; when the range hood is working, the exhaust fan is started, and a negative pressure area is formed in the inner air duct of the range hood, and the air outside the panel enters the inner air duct of the fan through the air intake port and forms a negative pressure area near the air intake port, and the oil smoke in the cooking environment flows to the negative pressure area of ​​the air intake port. When external fumes enter the air collecting chamber through the air suction port, their flow direction is toward the back plate of the air collecting chamber. The air flow entering through the air suction port will directly collide with the back plate of the air collecting chamber, generating a large noise. After the air flow collides with the back plate, part of the air flow flows upward along the back plate, and part flows downward along the back plate. The air flow flowing downward will disrupt the air flow at the air suction port when it flows back, affecting the ability of the smoke exhaust fan to extract fumes. However, if an air inlet guide component is provided in the smoke collecting chamber of the range hood, when the fumes in the cooking environment enter the inner air duct of the range hood through the air suction port, the air inlet guide component will guide the air flowing toward the back plate, so that the air flow flows in the direction guided by the air inlet guide component, which can reduce the air flow impacting the back plate of the smoke collecting chamber, reduce the noise generated by the air flow impacting the back plate, and reduce the resistance of the back plate of the smoke collecting chamber to the air flow flowing toward the suction side of the smoke exhaust fan.

[0032] See also Figures 1 to 4The utility model discloses an air inlet guide component, which is arranged in the smoke collecting chamber 41 of the range hood, and includes a guide block 1 and a guide plate 2. The guide block 1 has a first guide surface 11 and a second guide surface 12. The first guide surface 11 is arranged to be tilted forward from bottom to top, and the second guide surface 12 is arranged to be tilted backward from bottom to top; the guide plate 2 is arranged above the guide block 1, and has a third guide surface 21 on the guide plate 2. The third guide surface 21 is arranged to be tilted backward from top to bottom, and a guide channel is formed between the guide plate 2 and the second guide surface 12. The air inlet guide assembly of the utility model is installed in the smoke collecting chamber 41 of the range hood and is opposite to the air suction port 42 of the range hood. The first guide surface 11 is located above the second guide surface 12. The first guide surface 11 is tilted forward from bottom to top, so that the distance between the first guide surface 11 and the air suction port 42 increases from top to bottom. The second guide surface 12 is tilted backward from bottom to top, so that the distance between the second guide surface 12 and the third guide surface 21 and the air suction port 42 increases from bottom to top. The guide plate 2 is spaced opposite to the second guide surface 12, and the third guide surface 21 is arranged on the side of the guide plate 2 facing away from the second guide surface 12. When the air flow is sucked into the smoke collecting chamber 41 from the air inlet 42, the air flow will continue to flow toward the back plate of the smoke collecting chamber 41. When flowing through the air outlet guide component, part of the air will be guided by the third guide surface 21 and the guide channel, and will flow obliquely upward along the third guide surface 21 and the guide channel. Due to the guidance of the guide channel and the third guide surface 21, the air flow that impacts the back plate of the smoke collecting chamber 41 is reduced, and the impact force on the back plate of the smoke collecting chamber 41 is reduced, which can reduce the noise generated by the air flow impacting the back plate, and The resistance of the back plate of the smoke collecting chamber to the air flowing toward the suction side of the smoke exhaust fan is reduced; the other part of the air flow is guided by the first guide surface 11 and flows downward along the first guide surface 11, which can reduce the amount of the downward-flowing air flow that impacts the back plate of the smoke collecting chamber 41, and continue to reduce the noise generated by the air flow impacting the back plate, and the downward-flowing air flow is guided by the first guide surface 11 and flows to the bottom of the suction port of the range hood, avoiding affecting the flow direction of the air flow entering at the lower suction port, thereby improving the range hood's ability to extract oil fumes.

[0033] The length direction of the guide block 1 and the guide plate 2 can be consistent with the length direction of the air suction port 42, so that the air flow sucked into the smoke collecting chamber 41 from the air suction port 42 can flow through the air inlet guide assembly when flowing toward the back plate.

[0034] The first guide surface 11 and the second guide surface 12 can be inclined surfaces or curved surfaces. Figure 3 and Figure 4 ,exist Figure 3 and Figure 4In the embodiment of the air inlet guide assembly shown, the first guide surface 11 and the second guide surface 12 are both cambered surfaces, and a transition surface 13 is provided between the upper edge of the first guide surface 11 and the lower edge of the second guide surface 12, and the transition surface 13 is a cambered surface. The first guide surface 11 and the second guide surface 12 are both concave cambered surfaces, and the lines of the cambered surfaces are smooth and flowing, so that the turning process of the air flow when passing through the first guide surface 11 and the second guide surface 12 is more natural and smooth, thereby reducing the influence of the turning process on the air flow velocity and air flow stability, so as to improve the air guiding effect of the first guide surface 11 and the second guide surface 12 on the air.

[0035] The air flow that enters the smoke collecting chamber 41 through the air intake port of the range hood collides with the second guide surface 12, and then flows upward along the second guide surface 12. The air flow that deviates downward from the air intake port and flows toward the bottom of the smoke collecting chamber 41 flows to the first guide surface 11 through the transition surface 13, and flows downward along the first guide surface 11. The first guide surface 11 and the second guide surface 12 are configured as curved surfaces, so that the air flow can flow smoothly along them and guide the air flow to a longer distance toward the back plate of the smoke collecting chamber 41; the transition surface 13 is a curved surface, which can reduce the noise generated when the air flow hits the transition surface 13.

[0036] The surface of the guide plate 2 opposite to the second guide surface 12 may be an inclined surface or a curved surface. Figure 3 and Figure 4 ,exist Figure 3 and Figure 4 In the embodiment of the air inlet guide assembly shown, the surface of the guide plate 2 arranged opposite to the second guide surface 12 is a curved surface. When the air flow flows along the guide channel, the turning process of the air in the guide channel is made more natural and smooth, so as to reduce the influence on the air flow velocity and air flow stability, thereby further improving the air guiding effect of the guide plate 2.

[0037] See also Figure 3 and Figure 4 In the air inlet guide assembly of the utility model, the guide plate 2 includes an arc segment 2a and a vertical segment 2b, and the vertical segment 2b is formed by the upper edge of the arc segment 2a extending upward. The arc segment 2a can be a circular arc curve or a smooth conic curve. The air flowing through the third guide surface 21 first turns naturally and smoothly under the action of the arc segment 2a, and then is guided by the vertical segment 2b to continue to flow upward under the action of inertia. Similarly, the air flowing through the guide channel can also continue to flow upward under the guidance of the vertical segment 2b when flowing out of the guide channel, so that part of the air can flow upward smoothly and quickly after passing through the air inlet guide assembly, reducing the amount of air that impacts the back plate of the smoke collecting chamber 41.

[0038] See also Figure 2 and Figure 3The air inlet guide assembly of the utility model further includes a support block 3, which is arranged on the second guide surface 12 and is used to connect the guide plate 2 above the second guide surface 12 of the guide block 1. The support block 3 fixes the guide plate 2 above the guide block 1, so that the flow area of ​​the guide channel can be controlled.

[0039] The number of the supporting block 3 can be one, or two or more. Figure 1 and Figure 3 ,exist Figure 1 and Figure 3 In the embodiment of the air inlet guide assembly shown, there are multiple support blocks 3, and the multiple support blocks 3 are evenly distributed on the second guide surface 12, and the guide channel is evenly divided into at least two parts. When the air enters the guide channel, it can be divided into multiple streams under the action of the support blocks 3, and the multiple streams of air enter various parts of the guide channel respectively, and the air flows in various parts do not affect each other, thereby improving the flow stability of the air in the guide channel.

[0040] In the air inlet guide assembly of the utility model, the shape of the surface of the support block 3 and the guide plate 2 that are arranged opposite to each other is adapted to the surface of the guide plate 2 connected to it, and the wall surfaces on both sides of the support block 3 include a vertical surface and arc-shaped surfaces located on the upper and lower sides of the vertical surface, and the inlet of the guide channel located between the two support blocks 3 is in a contracted shape, and the outlet is in an expanded shape. The spacing between two adjacent support blocks 3 gradually shrinks from the outside to the inside at the inlet of the guide channel, and gradually expands from the inside to the outside at the outlet of the guide channel. In this way, more and faster air can pass through the inlet of the guide channel when entering the guide channel, so as to reduce the impact on the air flow velocity and air flow stability; the air can also disperse faster through the expanded outlet when flowing out of the guide channel. For the sake of convenience, the part between the two support blocks 3 is called the guide channel branch. The cross-section at the entrance of the guide channel branch changes from large to small, and the cross-section at the exit of the guide channel branch changes from small to large. The middle part of the guide channel branch is a flow with uniform cross-sectional width. The diameter of the entrance end of the entrance is larger than the diameter of the inlet outlet, which is convenient for air to flow through the entrance of the guide channel into the middle part of the guide channel branch, and accelerate the airflow in the process of entering the middle part from the entrance. When the accelerated airflow flows out from the outlet, the diameter at the outlet gradually becomes larger, which is convenient for the airflow to flow out, and the airflow slows down after flowing out, which can reduce the noise of the airflow flowing out through the guide channel branch.

[0041] If the surface of the guide plate 2 facing the second guide surface 12 is an inclined surface, the surface of the support block 3 opposite to the guide plate 2 is also an inclined surface; if the surface of the guide plate 2 facing the second guide surface 12 is an arc surface, the surface of the support block 3 opposite to the guide plate 2 is also an arc surface; in this way, the connection area between the support block 3 and the guide plate 2 can be increased to improve the connection stability.

[0042] See also Figures 5 to 7The utility model also discloses a range hood. The range hood disclosed in the utility model adopts the above-mentioned air inlet guide assembly, including a range hood body 4, the range hood body 4 has a smoke collecting chamber 41 and an air suction port 42 connected to the smoke collecting chamber 41, a smoke exhaust fan 5 is provided in the smoke collecting chamber 41, the smoke exhaust fan 5 is located above the air suction port 42, the guide block 1 is connected to the back plate of the smoke collecting chamber 41, and the air suction port 42 is aligned with the guide channel and the third guide surface 21.

[0043] When the range hood is working, the smoke exhaust fan 5 is started and a negative pressure is formed in the smoke collecting chamber 41 of the range hood. Under the action of the negative pressure, the air at the air inlet 42 of the range hood body 4 flows to the smoke collecting chamber 41 of the range hood through the air inlet 42. When flowing through the air outlet guide assembly, part of the air will be guided by the third guide surface 21 and the guide channel, and will flow obliquely upward along the third guide surface 21 and the guide channel. Due to the guidance of the guide channel and the third guide surface 21, the air flow rate that impacts the back plate of the smoke collecting chamber 41 is reduced, and the impact force on the back plate of the smoke collecting chamber 41 is reduced, which can reduce The noise generated by the air flow hitting the back plate can be reduced, and the resistance of the back plate of the smoke collecting chamber to the air flow to the suction side of the smoke exhaust fan can be reduced; the other part of the air flow is guided by the first guide surface 11 and flows downward along the first guide surface 11, which can reduce the amount of the downward-flowing air flow that hits the back plate of the smoke collecting chamber 41, and continue to reduce the noise generated by the air flow hitting the back plate, and the downward-flowing air flow is guided by the first guide surface 11 and flows to the bottom of the suction port of the range hood, so as to avoid affecting the flow direction of the air flow entering at the lower suction port, thereby improving the range hood's ability to extract oil fumes.

[0044] See also Figure 7 In the range hood of the present invention, the upper edge of the first guide surface 11 is located below the air suction port 42. In this way, the amount of air diverted to flow downward along the first guide surface 11 can be reduced, so as to reduce the influence of this part of air on the air flow at the air suction port 42 after it flows back upward, thereby ensuring the stability of the air flow at the air suction port 42, and thus ensuring the ability of the smoke exhaust fan 5 to absorb oil smoke.

[0045] See also Figure 6 In the range hood of the present invention, the smoke exhaust fan 5 is tilted backward from bottom to top, and its air suction side faces the back plate of the smoke collecting chamber 41. The center of the air suction side of the smoke exhaust fan 5 can be moved downward, and the air flow entering the smoke collecting chamber 41 can quickly enter the smoke exhaust fan 5 and be discharged from the smoke collecting chamber 41 under the guidance of the near-air outlet guide component, thereby improving the exhaust efficiency of the smoke exhaust fan 5 for oil smoke.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air inlet guide assembly, arranged in a smoke collecting chamber of a range hood, characterized in that: include: A guide block (1) comprising a first guide surface (11) and a second guide surface (12), wherein the first guide surface (11) is arranged to be inclined forward from bottom to top, and the second guide surface (12) is arranged to be inclined backward from bottom to top; A guide plate (2) is arranged above the guide block (1), the guide plate (2) having a third guide surface (21), the third guide surface (21) being arranged to tilt backward from top to bottom, and a guide channel being formed between the guide plate (2) and the second guide surface (12).

2. The air inlet guide assembly according to claim 1, characterized in that: The first flow guiding surface (11) and the second flow guiding surface (12) are both cambered surfaces, and a transition surface (13) is provided between the upper edge of the first flow guiding surface (11) and the lower edge of the second flow guiding surface (12), and the transition surface (13) is a cambered surface.

3. The air inlet guide assembly according to claim 1, characterized in that: The surface of the guide plate (2) and the second guide surface (12) arranged opposite to each other is a curved surface.

4. The air inlet guide assembly according to claim 3, characterized in that: The guide plate (2) comprises an arc segment (2a) and a vertical segment (2b), wherein the vertical segment (2b) is formed by extending upward from the upper edge of the arc segment (2a).

5. The air inlet guide assembly according to claim 1, characterized in that: It also comprises a support block (3), wherein the support block (3) is arranged on the second guide surface (12) and is used to connect the guide plate (2) above the second guide surface (12) of the guide block (1).

6. The air inlet guide assembly according to claim 5, characterized in that: The number of the support blocks (3) is multiple, and the multiple support blocks (3) are evenly distributed on the second flow guide surface (12), and divide the flow guide channel into at least two parts.

7. The air inlet guide assembly according to claim 5, characterized in that: The shape of the surface of the support block (3) and the guide plate (2) arranged opposite to each other is adapted to the surface of the guide plate (2) connected to it, the wall surfaces on both sides of the support block (3) include a vertical surface and arcuate surfaces located on both sides above and below the vertical surface, and the inlet of the portion of the guide channel located between the two support blocks (3) is in a contracted shape, and the outlet is in a flared shape.

8. A range hood, using the air inlet guide assembly according to any one of claims 1 to 7, characterized in that: The range hood comprises a main body (4), the main body (4) having a smoke collecting chamber (41) and an air suction port (42) connected to the smoke collecting chamber (41), a smoke exhaust fan (5) being arranged in the smoke collecting chamber (41), the smoke exhaust fan (5) being located above the air suction port (42), the guide block (1) being connected to the back plate of the smoke collecting chamber (41), the air suction port (42) being aligned with the guide channel and the third guide surface (21).

9. The range hood according to claim 8, characterized in that: The upper edge of the first guide surface (11) is located below the air suction port (42).

10. The range hood according to claim 8, characterized in that: The smoke exhaust fan (5) is arranged to tilt backward from bottom to top, with its air suction side facing the back plate of the smoke collecting chamber (41).

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