Range hood

Abstract

The utility model discloses a range hood which comprises a range hood body, and the range hood body is provided with a smoke collecting cavity and an oil leakage hole communicated with the smoke collecting cavity. The shielding structure is at least provided with a shielding part aligned with the oil leakage hole, the shielding part shields the oil leakage hole, the length of the shielding part in the front-back direction is larger than the size of the oil leakage hole in the front-back direction, the width of the shielding part in the left-right direction is larger than the size of the oil leakage hole in the left-right direction, and the shielding part is higher than the oil leakage hole; an oil passing gap is formed by a gap between the oil leakage hole and the surface where the oil leakage hole is located; compared with the prior art, according to the range hood disclosed by the utility model, as the shielding part is used for blocking the airflow passing through the oil leakage hole, the airflow flows along the shielding part after impacting the shielding part and flows out from the oil passing gap, the airflow passing through the oil leakage hole and shielded by the shielding part cannot directly impact the airflow in the smoke collecting cavity, and the influence on the airflow in the smoke collecting cavity is relatively small; and the flow speed of the airflow entering the smoke collecting cavity after being blocked by the blocking part is reduced, and the generated noise is also reduced.

Description

Technical Field

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

[0002] In order to overcome the exhaust resistance, the static pressure of the fan of the current range hood is made higher and higher. When the range hood is working, the negative pressure in the smoke collecting chamber air duct is very high. Under the action of negative pressure, the oil smoke generated by the user's cooking flows into the smoke collecting chamber, and part of the oil smoke will enter the smoke collecting chamber through the oil leakage hole. When the oil smoke enters the smoke collecting chamber through the oil leakage hole, the air flow velocity is very high. When entering the smoke collecting chamber, it will disrupt the airflow in the smoke collecting chamber air duct, causing a large energy loss and generating high aerodynamic noise. Utility Model Content

[0003] The purpose of the present utility model is to provide a range hood, which is used to solve the above technical problems.

[0004] A range hood comprises a range hood main body having a smoke collecting chamber and an oil leakage hole connected to the smoke collecting chamber; further comprising a shielding structure, the shielding structure having at least a shielding portion aligned with the oil leakage hole, the shielding portion shielding the oil leakage hole, the length of the shielding portion in the front-to-back direction being greater than the dimension of the oil leakage hole in the front-to-back direction, the width of the shielding portion in the left-to-right direction being greater than the dimension of the oil leakage hole in the left-to-right direction, the shielding portion being higher than the oil leakage hole, and the gap between the shielding portion and the surface where the oil leakage hole is located forming an oil-passing gap.

[0005] According to one embodiment of the present invention, the width of the shielding portion in the left-right direction is 1 mm to 10 mm larger than the dimension of the oil leakage hole in the left-right direction.

[0006] According to one embodiment of the present invention, the shielding portion is arranged to be tilted front to back, the front side of the shielding portion extends forward to be connected to the range hood body, and the rear side of the shielding portion extends backward to be connected to the range hood body.

[0007] According to one embodiment of the present invention, a first connecting portion is provided at the front end of the shielding portion, and a second connecting portion is provided at the rear end of the shielding portion. The first connecting portion and the second connecting portion are connected to the range hood body, and the shielding portion is placed above the oil leakage hole.

[0008] According to one embodiment of the present invention, the range hood body is provided with an air suction port, which is communicated with the smoke collecting chamber.

[0009] According to one embodiment of the present utility model, the oil leakage hole and the air suction port are arranged on the top surface of the range hood body, and the shielding structure is arranged in the smoke collecting chamber.

[0010] According to one embodiment of the present invention, the oil leakage hole is located at the rear side of the air suction port, and the front end of the shielding structure is located between the oil leakage hole and the air suction port.

[0011] According to one embodiment of the present invention, at least the surface of the smoke collecting chamber connected to the air suction port is tilted downward from front to back, and the portion of the smoke collecting chamber aligned with the oil leakage hole is located at the lowest point.

[0012] According to one embodiment of the present invention, an oil cup is further included, which is connected to the range hood body. The opening of the oil cup faces the oil leakage hole, and an air inlet gap is formed between the upper edge of the wall of the oil cup and the top surface of the range hood body.

[0013] According to one embodiment of the present invention, the top surface of the range hood body is tilted downward from front to back, and the downward projection of the rear edge of the top surface falls into the oil cup.

[0014] Compared with the prior art, the range hood of this utility model has the following advantages:

[0015] 1. The range hood of the present invention, when the range hood is working, the exhaust fan of the range hood runs and forms a negative pressure in the smoke collecting chamber. Under the action of the negative pressure, when the oil smoke generated by the user's cooking flows into the smoke collecting chamber, a part of the oil smoke will enter the smoke collecting chamber through the oil leakage hole. When the oil smoke continues to flow through the oil leakage hole, it impacts the shielding part of the shielding structure. Since the shielding part blocks the airflow passing through the oil leakage hole, after the airflow hits the shielding part, under the action of the shielding part, part of it will flow back, and the other part will flow along the shielding part and flow out from the oil gap. The airflow after passing through the oil leakage hole and being blocked by the shielding part will not directly impact the airflow in the smoke collecting chamber, and has a relatively small impact on the airflow in the smoke collecting chamber. In addition, the airflow entering the smoke collecting chamber after being blocked by the shielding part has a reduced flow velocity, and the noise generated will also be reduced.

[0016] 2. The range hood of the present invention is provided with a shielding structure, and the shielding part of the shielding structure shields the oil leakage hole. Under the action of the negative pressure in the smoke collecting chamber, when the smoke flows through the oil leakage hole, the oil in and near the oil leakage hole is driven upward. When the oil splashes upward with the air flow, it is blocked by the shielding part, which can prevent the oil from splashing everywhere. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the range hood of the present utility model;

[0018] Figure 2 for Figure 1 A magnified view of middle A;

[0019] In the figure: 1. Range hood body, 11. Smoke collection chamber, 12. Oil leakage hole, 13. Air inlet, 14. Top surface, 2. Shielding structure, 21. Shielding part, 22. First connecting part, 3. Oil cup

[0020] The realization of the functions and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] The following diagrams illustrate various embodiments of the present invention. For clarity, many practical details will be included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some commonly used structures and components are depicted in simplified schematic form.

[0022] 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 various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or sequence, nor are they used to limit the present invention. 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 such feature. 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 invention.

[0024] 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:

[0025] See also Figure 1 and Figure 2The utility model discloses a range hood, which includes a range hood body 1, which has a smoke collecting chamber 11 and an oil leakage hole 12 connected to the smoke collecting chamber 11; and a shielding structure 2, which has at least a shielding portion 21 aligned with the oil leakage hole 12, the shielding portion 21 shields the oil leakage hole 12, the length of the shielding portion 21 in the front-to-back direction is greater than the size of the oil leakage hole 12 in the front-to-back direction, the width of the shielding portion 21 in the left-to-right direction is greater than the size of the oil leakage hole 12 in the left-to-right direction, the shielding portion 21 is higher than the oil leakage hole 12, and the gap between the shielding portion 21 and the surface where the oil leakage hole 12 is located forms an oil-passing gap. The smoke exhaust fan of the utility model runs when the smoke hood is working and forms a negative pressure in the smoke collecting chamber 11. Under the action of the negative pressure, when the oil smoke generated by the user's cooking flows into the smoke collecting chamber 11, a part of the oil smoke will enter the smoke collecting chamber 11 through the oil leakage hole 12. When the oil smoke continues to flow through the oil leakage hole 12, it will impact the shielding part 21 of the shielding structure 2. Since the shielding part 21 blocks the airflow passing through the oil leakage hole 12, after the airflow hits the shielding part 21, part of it will flow back under the action of the shielding part 21, and the other part will flow along the shielding part 21 and flow out from the oil gap. The airflow after passing through the oil leakage hole 12 and being blocked by the shielding part 21 will not directly hit the airflow in the smoke collecting chamber 11, and has a relatively small impact on the airflow in the smoke collecting chamber 11. In addition, the airflow entering the smoke collecting chamber 11 after being blocked by the shielding part 21 has a reduced flow rate, and the noise generated will also be reduced.

[0026] The range hood of the present invention is provided with a shielding structure 2, and the shielding portion 21 of the shielding structure 2 shields the oil leakage hole 12. Under the action of the negative pressure in the smoke collecting chamber 11, when the smoke flows through the oil leakage hole 12, the oil in and near the oil leakage hole 12 is driven upward. When the oil splashes upward with the airflow, it is blocked by the shielding portion 21, which can prevent the oil from splashing everywhere.

[0027] In the range hood of the present invention, the width of the shielding portion 21 in the left-right direction is 1mm to 10mm larger than the left-right dimension of the oil leakage hole 12. The shielding portion 21 can fully block the oil leakage hole 12. The airflow flowing out of the oil leakage hole 12 and moving upward is blocked by the shielding portion 21, and is delayed along the shielding portion 21 toward the wall of the oil leakage hole 12 and reduced in flow rate. This prevents the high-speed airflow flowing out of the oil leakage hole 12 into the smoke collection chamber 11 from impacting the airflow within the smoke collection chamber, disturbing the airflow organization within the smoke collection chamber, and generating a large amount of aerodynamic noise.

[0028] The range hood of the present invention can be a side-suction range hood. When the range hood is a side-suction range hood, the air inlet 13 of the range hood body is arranged on the side of the range hood, the bottom of the smoke collecting chamber 11 is provided with an oil outlet hole, the range hood body is provided with an oil collecting chamber, the smoke collecting chamber 11 is connected with the oil collecting chamber, the oil leakage hole 12 is arranged at the bottom of the oil collecting chamber, the shielding structure 2 is arranged at the bottom of the oil collecting chamber, and when the exhaust fan of the range hood is running, a negative pressure is formed in the smoke collecting chamber 11. Since the smoke collecting chamber 11 is connected with the oil collecting chamber, the air in the oil collecting chamber will also be discharged to the smoke collecting chamber under the action of the negative pressure of the smoke collecting chamber 11. The oil fumes produced by the cooking process will flow into the oil collecting chamber through the oil leakage hole 12 at the bottom of the oil collecting chamber under the action of the negative pressure of the oil collecting chamber. The airflow entering the oil collecting chamber through the oil leakage hole 12 flows upward and collides with the shielding part 21 of the shielding structure 2. After the airflow collides with the shielding part 21, the flow rate becomes smaller and flows along the shielding surface of the shielding part 21 to both sides of the shielding part. The oil driven by the airflow rises with the airflow and is blocked by the shielding part 21, so as to prevent the oil at the bottom of the oil collecting chamber from being driven by the airflow and splashing in the oil collecting chamber.

[0029] When the range hood is a side-suction range hood, the shielding portion 21 is located above the oil leakage hole 12 in the oil collecting chamber, the front end of the shielding structure 2 is connected to the front wall of the oil collecting chamber, and the rear end of the shielding structure is connected to the rear wall of the oil collecting chamber.

[0030] Since the side-suction range hood has a relatively far distance between the oil leakage hole 12 and the air suction port 13, the negative pressure at the oil leakage hole 12 is relatively small, so the airflow entering the oil collecting chamber through the oil leakage hole 12 is relatively small. The shielding portion 21 can consume the capacity of this part of the airflow very well, further reducing the flow rate of the airflow entering the smoke collecting chamber 11 through the oil collecting chamber, so that this part of the airflow has as little impact as possible on the airflow organization entering the smoke collecting chamber 11 through the air suction port 13.

[0031] The oil leakage hole 12 and the air suction port 13 of the range hood are both arranged on the top surface 14 of the range hood body 1. The oil leakage hole 12 is relatively close to the air suction port 13. When the smoke exhaust fan of the range hood is running, the negative pressure formed by the smoke exhaust fan at the oil leakage hole 12 is also relatively large, and the flow rate of the air entering through the oil leakage hole 12 is also relatively large. After this part of the air flow enters the smoke collecting chamber 11 through the oil leakage hole 12, it will impact the air flow entering the smoke collecting chamber 11 through the air suction port 13, affecting the air flow organization entering the smoke collecting chamber 11 through the air suction port 13; and when this part of the air flow is mixed with the air flow organization entering the smoke collecting chamber 11 through the air suction port 13, relatively large aerodynamic noise will be generated; in addition, the high-speed air flow flowing through the oil leakage hole 12 will drive the oil collected at the bottom of the smoke collecting chamber 11 upward, causing the oil to splash, and the oil will stain the wall surface of the smoke collecting chamber 11, and there is also the risk of falling from the air suction port 13 to the outside of the range hood body 1. Therefore, the effect of setting the shielding structure 2 in the top-suction range hood is more obvious.

[0032] See also Figure 1 and Figure 2 In the following embodiments, the range hood is a top-suction range hood, and the range hood body 1 is provided with an air suction port 13, which is connected to the smoke collecting chamber 11, the oil leakage hole 12 and the air suction port 13 are provided on the top surface 14 of the range hood body 1, and the shielding structure 2 is provided in the smoke collecting chamber 11. When the range hood is running, the smoke exhaust fan of the range hood runs, so that a relatively large negative pressure is formed in the smoke collecting chamber 11. Part of the oil smoke generated by the user's cooking enters the smoke collecting chamber 11 through the air suction port 13, then flows in the smoke collecting chamber and is discharged by the smoke exhaust fan. The other part of the oil smoke flows into the smoke collecting chamber 11 through the oil leakage hole 12, passes through the shielding part 21 during the flow, and is blocked by the shielding part 21. When the airflow passes through the oil leakage hole 12 and hits the shielding part 21, the airflow collides with the shielding part 21. After colliding with the shielding part 21, the capacity of the airflow is reduced, the flow rate of the airflow is reduced, and the airflow flows along the shielding surface of the shielding part 21. It will not directly impact the airflow organization entering the smoke collecting chamber 11 through the air suction port 13, and will not consume the capacity of this part of the airflow organization, so that this part of the airflow organization can flow in the smoke collecting chamber 11 at a high speed. , and flows toward the air inlet side of the smoke exhaust fan, so that the smoke exhaust fan can quickly discharge this part of the airflow organization; and the airflow entering through the oil leakage hole 12 is blocked by the shielding part 21, the flow rate slows down, and the airflow flows out along the shielding part and mixes with the airflow organization entering the smoke collecting chamber 11 through the air suction port 13, without generating a large startup noise, which can reduce the noise of the range hood; and the airflow enters the smoke collecting chamber 11 through the oil leakage hole 12, and the high-speed airflow will drive the oil at the oil leakage hole upward. Under the shielding of the shielding part 21, this part of the oil rises to the shielding surface of the shielding part 21 with the airflow and is thrown onto the shielding surface of the shielding part 21, and will not continue to rise and splash, avoiding the splashing oil from falling through the air suction port 13 to the outside of the range hood main body 1 and falling onto the user's cooking table or pot.

[0033] See also Figure 1 and Figure 2 In an embodiment of a top-suction range hood, the shielding portion 21 is tilted forward and backward. The front side of the shielding portion 21 extends forward to connect with the range hood body 1, and the rear side of the shielding portion 21 extends backward to connect with the range hood body 1. The front end of the shielding portion 21 extends forward to connect with the front inner wall surface of the smoke collecting chamber 11, and the rear end of the shielding portion 21 extends backward to connect with the rear inner wall surface of the smoke collecting chamber 11. The shielding portion 21 can be tilted downward from front to back or from back to front without limitation. By making the front and rear ends of the shielding portion 21 at different heights, the shielding portion 21 is higher than the oil leakage hole 12. The oil at the bottom of the smoke collecting chamber 11 can still flow from both sides of the shielding portion 21 to the oil leakage hole 12 below the shielding portion 21. After the smoke exhaust fan stops running, the oil can still be discharged through the oil leakage hole 12.

[0034] Of course, in other embodiments, the shielding portion 21 can also be arranged horizontally, with the front end of the shielding portion 21 extending forward to connect with the front inner wall of the smoke collecting chamber 11, and the rear end of the shielding portion 21 extending backward to connect with the rear inner wall of the smoke collecting chamber 11.

[0035] See also Figure 1 and Figure 2 In the range hood of the present invention, a first connecting portion 22 is provided at the front end of the shielding portion 21, and a second connecting portion 23 is provided at the rear end of the shielding portion 21. The first connecting portion 22 and the second connecting portion 23 are connected to the range hood body 1, and the shielding portion 21 is placed above the oil leakage hole 12. The provision of the first connecting portion 22 and the second connecting portion 23 allows the shielding structure 2 to be more easily installed within the smoke collection chamber 11. The first connecting portion 22 can be glued to the inner wall surface of the corresponding side of the smoke collection chamber 11, or it can be fixed to the inner wall surface of the corresponding side of the smoke collection chamber 11 by riveting.

[0036] See also Figure 1 and Figure 2 In the range hood of the present invention, the oil leakage hole 12 is located behind the air intake port 13, and the front end of the shielding structure 2 is located between the oil leakage hole 12 and the air intake port 13. The shielding structure 2 blocks the oil leakage hole 12 to prevent the airflow entering the smoke collecting chamber 11 through the oil leakage hole 12 from disturbing the airflow entering the smoke collecting chamber 11 through the air intake port 13. In addition, the front end of the shielding structure 2 does not extend to the air intake port 13, so it will not affect the air intake of the air intake port 13.

[0037] See also Figure 1 and Figure 2 In the range hood of the present invention, at least the surface of the smoke collecting chamber 11 connected to the air suction port 13 is tilted downward from front to back, and the portion of the smoke collecting chamber 11 aligned with the oil leakage hole 12 is located at the lowest point. When the smoke exhaust fan is running, oil smoke enters the smoke collecting chamber 11 through the air suction port 13 and the oil leakage hole 12, and the oil and water mixture in the oil smoke will adhere to the wall surface of the smoke collecting chamber 11. When the oil smoke is discharged from the smoke collecting chamber by the smoke exhaust fan, the oil and water mixture in the oil smoke will also adhere to the volute of the smoke exhaust fan. After the smoke exhaust fan is turned off, the oil on the volute of the smoke exhaust fan falls into the smoke collecting chamber 11, and the oil on the front inner wall surface of the smoke collecting chamber 11 also flows along the front inner wall surface of the smoke collecting chamber 11. The wall surface at the connection between the smoke collecting chamber 11 and the air suction port 13 is tilted, which can guide the oil smoke accumulated on the inner wall surface to the bottom of the smoke collecting chamber 11, so that the oil smoke is discharged from the smoke collecting chamber 11 through the oil leakage hole 12.

[0038] See also Figure 1 and Figure 2The range hood of the present invention further includes an oil cup 3, which is connected to the range hood body 1. The opening of the oil cup 3 faces the oil leakage hole 12, and an air inlet gap is formed between the upper edge of the wall of the oil cup 3 and the top surface 14 of the range hood body 1. Because the oil cup 3 is detachably connected to the range hood body 1, the upper edge of the front wall of the oil cup 3 cannot completely abut against the top surface 14 of the range hood body 1. Therefore, when the range hood's exhaust fan is in operation, the gap between the top surface 14 of the range hood body 1 and the upper edge of the oil cup 3 forms an air inlet gap. Under the influence of the negative pressure within the smoke collection chamber 11, some oil smoke flows through the air inlet gap to the space between the oil cup 3 and the top surface 14 of the range hood body 1, then flows into the smoke collection chamber 11 through the oil leakage hole 12. Upon exiting the oil leakage hole 12, it is blocked by the shielding portion 21 of the shielding structure 2. After the smoke exhaust fan of the range hood is turned off, the oil at the bottom of the smoke collecting chamber 11 flows out through the oil leakage hole 12 and enters the oil cup 3, where it is collected.

[0039] See also Figure 1 and Figure 2 In the range hood of the present invention, the top surface 14 of the range hood body 1 is tilted downward from front to back, with the rear edge of the top surface 14 projecting downward into the oil cup 3. When the range hood's exhaust fan is activated, as oil smoke flows toward the air intake 13 and oil leak hole 12, some of the oil smoke will impact the top surface 14 of the range hood body 1, creating an oil-water mixture on the top surface 14. The downward tilt of the top surface 14 from front to back causes the oil-water mixture adhering to the top surface 14 to flow along it, eventually converging at the rear edge of the top surface 14 and falling into the oil cup 3.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A range hood, characterized in that: The range hood comprises a main body (1), the main body (1) having a smoke collecting chamber (11) and an oil leakage hole (12) communicating with the smoke collecting chamber (11); and a shielding structure (2), the shielding structure (2) having at least a shielding portion (21) aligned with the oil leakage hole (12), the shielding portion (21) shielding the oil leakage hole (12), the length of the shielding portion (21) in the front-to-back direction being greater than the dimension of the oil leakage hole (12) in the front-to-back direction, the width of the shielding portion (21) in the left-to-right direction being greater than the dimension of the oil leakage hole (12) in the left-to-right direction, the shielding portion (21) being higher than the oil leakage hole (12), and the gap between the shielding portion (21) and the surface where the oil leakage hole (12) is located forming an oil-passing gap; The width of the shielding portion (21) in the left-right direction is 1 mm to 10 mm larger than the size of the oil leakage hole (12) in the left-right direction.

2. The range hood according to claim 1, characterized in that: The shielding portion (21) is arranged to be inclined frontward and rearward, the front side of the shielding portion (21) extends forward to be connected to the range hood body (1), and the rear side of the shielding portion (21) extends rearward to be connected to the range hood body (1).

3. The range hood according to claim 1, characterized in that: A first connecting portion (22) is provided at the front end of the shielding portion (21), and a second connecting portion (23) is provided at the rear end of the shielding portion (21). The first connecting portion (22) and the second connecting portion (23) are connected to the range hood body (1), and the shielding portion (21) is placed above the oil leakage hole (12).

4. The range hood according to claim 1, characterized in that: The range hood body (1) is provided with an air suction port (13), and the air suction port (13) is in communication with the smoke collecting chamber (11).

5. The range hood according to claim 4, characterized in that: The oil leakage hole (12) and the air suction port (13) are provided on the top surface (14) of the range hood body (1), and the shielding structure (2) is provided in the smoke collecting chamber (11).

6. The range hood according to claim 5, characterized in that: The oil leakage hole (12) is located at the rear side of the air suction port (13), and the front end of the shielding structure (2) is located between the oil leakage hole (12) and the air suction port (13).

7. The range hood according to claim 6, characterized in that: At least the surface of the smoke collecting chamber (11) connected to the air suction port (13) is tilted downward from front to back, and the portion of the smoke collecting chamber (11) aligned with the oil leakage hole (12) is located at the lowest point.

8. The range hood according to claim 1, characterized in that: It also includes an oil cup (3), the oil cup (3) being connected to the range hood body (1), the opening of the oil cup (3) facing the oil leakage hole (12), and an air inlet gap being formed between the upper edge of the wall of the oil cup (3) and the top surface (14) of the range hood body (1).

9. The range hood according to claim 8, characterized in that: The top surface (14) of the range hood body (1) is tilted downward from front to back, and the downward projection of the rear edge of the top surface (14) falls into the oil cup (3).

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