A range hood

Abstract

The utility model relates to kitchen appliance technical field, concretely disclose a kind of range hood, the range hood includes smoke collecting hood, mainframe box, fan and check valve, smoke collecting hood is equipped with the entrance for flue gas to enter;Mainframe box is installed in the upper of smoke collecting hood, along the left and right direction of range hood, mainframe box is centrally arranged relative to smoke collecting hood, can improve the aesthetic degree of range hood, satisfy the aesthetic demand of user;Fan is installed in smoke collecting hood, fan has air intake and exhaust port, air intake is located in smoke collecting hood and is communicated with entrance, along the left and right direction of range hood, the center of air intake and the center of smoke collecting hood are interval arrangement, check valve is communicated with exhaust port, check valve is located in mainframe box, by making fan install in smoke collecting hood, air intake of fan can be as close as possible to lower burner, and then the suction force generated by fan work can be maximally utilized, improve the effect of range hood suction oil smoke.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a range hood. Background Technology

[0002] A range hood is a kitchen appliance installed above the stove to purify the kitchen environment and remove harmful fumes and oil fumes produced during cooking, venting them outdoors. For range hoods, the ability to extract oil fumes is the primary consideration for users when choosing one. In addition, the aesthetics and space-saving design of the range hood are also increasingly valued by users.

[0003] In related technologies, to enhance the fume extraction capacity of a range hood, the fan is placed inside the fume collection hood, with the fan's air inlet located within the hood. The check valve, connected to the fan, extends into the main unit housing above the hood. This allows the air inlet to be as close as possible to the smoke source during cooking, improving fume extraction. Furthermore, to ensure a relatively even airflow speed across the range hood as fumes pass through the inlet, the air inlet is centered relative to the fume collection hood's inlet in the left-right direction. Additionally, to minimize the overall space occupied by the range hood, the main unit housing is designed to perfectly cover the check valve, meaning the check valve is centered relative to the main unit housing in the left-right direction.

[0004] However, the fan uses a volute fan, which makes the fan inlet off-center relative to the check valve in the left-right direction of the range hood. Since the air inlet is centered relative to the smoke hood and the check valve is centered relative to the main unit along the left-right direction of the range hood, this causes the main unit to be offset relative to the smoke hood in the left-right direction of the range hood, affecting the overall aesthetics of the range hood.

[0005] The information disclosed above in this background section is only intended to enhance the understanding of this background section, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0006] The purpose of this utility model is to provide a range hood that improves the aesthetics of the range hood while ensuring its oil fume extraction capacity.

[0007] This utility model provides a range hood, which includes:

[0008] The smoke hood is equipped with an inlet for smoke to enter;

[0009] The main unit is installed above the smoke collection hood, along the left-right direction of the range hood, and is centered relative to the smoke collection hood;

[0010] A fan is installed in the fume hood. The fan has an air inlet and an air outlet. The air inlet is located inside the fume hood and communicates with the inlet. Along the left and right direction of the range hood, the center of the air inlet is spaced apart from the center of the fume hood.

[0011] A check valve is connected to the exhaust port and is located inside the main unit housing. The air inlet has a first longitudinal center plane and the check valve has a second longitudinal center plane. The first longitudinal center plane and the second longitudinal center plane are spaced apart along the left and right direction of the range hood.

[0012] As a preferred technical solution for a range hood, the air inlet has a first longitudinal center plane, the check valve has a second longitudinal center plane, and the main unit and the smoke collection hood both have a third longitudinal center plane. Along the left-right direction of the range hood, the third longitudinal center plane is located between the first longitudinal center plane and the second longitudinal center plane.

[0013] As a preferred technical solution for the range hood, the width dimension of the main unit is a, the width dimension of the smoke collection hood is b, and 74 / 179≤a / b≤86 / 179.

[0014] As a preferred technical solution for a range hood, the distance between the first longitudinal center plane and the third longitudinal center plane along the left-right direction of the range hood is c, where 10 / 179≤c / b≤14 / 179.

[0015] As a preferred technical solution for a range hood, the distance between the second longitudinal center plane and the third longitudinal center plane along the left-right direction of the range hood is d, where 1 / 8 ≤ d / a ≤ 7 / 40.

[0016] As the preferred technical solution for range hoods, 5 / 6≤d / c≤7 / 6.

[0017] As a preferred technical solution for the range hood, the range hood further includes a rectifier disposed within the smoke collection hood. Along the front-to-back direction of the range hood, the rectifier is located between the inlet and the air inlet. The distance between the rectifier and the air inlet is g, and the distance between the inlet and the air inlet is p, where 0.4≤g / p≤0.6.

[0018] As a preferred technical solution for the range hood, the range hood further includes a smoke baffle and a baffle connected to each other, and both the smoke baffle and the baffle are connected to the smoke collection hood;

[0019] The smoke baffle and the baffle together form a smoke inlet chamber and a smoke exhaust port communicating with the smoke inlet chamber. The smoke exhaust port is communicating with the inlet. The baffle is provided with a smoke inlet communicating with the smoke inlet chamber.

[0020] As a preferred technical solution for a range hood, the top end of the baffle is rotatably connected to the smoke collection hood, the bottom end of the baffle is rotatably connected to the smoke collection hood, the top end of the baffle is slidably connected to the baffle, and the baffle can rotate relative to the smoke collection hood to switch between an open position with the inlet open and a closed position with the inlet closed.

[0021] The volume of the smoke inlet chamber changes as the smoke baffle rotates relative to the smoke collection hood. When the smoke baffle is in the open position, the smoke inlet chamber is outside the smoke collection hood and the volume of the smoke inlet chamber is at its maximum. When the smoke baffle is in the closed position, the smoke inlet chamber is inside the smoke collection hood and the volume of the smoke inlet chamber is at its minimum.

[0022] As a preferred technical solution for range hoods, when the smoke baffle is in the open position, the center of the inlet, the center of the air inlet, and the center of the smoke inlet are arranged in a triangle.

[0023] The range hood provided by this utility model has at least the following beneficial effects:

[0024] The fan of this range hood is installed inside the smoke collection hood, and the fan's air inlet is located inside the smoke collection hood and connected to the hood's inlet. This allows the fan's air inlet to be as close as possible to the cooktop below, maximizing the utilization of the suction power generated by the fan and improving the range hood's smoke extraction efficiency. In addition, the main unit is centered relative to the smoke collection hood along the left-right direction of the range hood, which enhances the aesthetics of the range hood and meets the user's aesthetic needs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the range hood in the embodiment of this utility model;

[0026] Figure 2 This is a first cross-sectional view of the range hood in this embodiment of the present invention;

[0027] Figure 3 This is a second sectional view of the range hood in this embodiment of the present invention (the smoke baffle is in the open position);

[0028] Figure 4 This is a third sectional view of the range hood in this embodiment of the present utility model (the smoke baffle is in the closed position).

[0029] Figure 5 This is a cross-sectional view of a partial structure of the range hood in this embodiment of the present invention (the smoke baffle is in the closed position).

[0030] In the picture:

[0031] 1. Smoke hood; 11. Inlet;

[0032] 2. Main unit case;

[0033] 3. Fan; 31. Air inlet; 32. Air outlet; 33. Volute; 34. Impeller;

[0034] 4. Check valve; 5. Rectifier;

[0035] 6. Smoke baffle; 61. Main body of smoke baffle; 62. Second side panel; 63. Flip-up panel;

[0036] 7. Baffle; 71. Baffle body; 72. First side plate;

[0037] 8. Smoke inlet chamber; 81. Smoke inlet; 82. Smoke outlet. Detailed Implementation

[0038] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0039] In the description of this utility model, it should be noted that the terms "longitudinal center plane," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions, and "above," "on top," and "over" the first feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0042] This embodiment provides a range hood for installation in a kitchen environment, specifically above a stove, to extract cooking fumes generated during cooking.

[0043] Please refer to Figures 1 to 4 The range hood includes a smoke collection hood 1, a main unit 2, a fan 3, and a check valve 4. The smoke collection hood 1 has an inlet 11 for smoke to enter. The main unit 2 is installed above the smoke collection hood 1. The fan 3 is installed on the smoke collection hood 1 and has an air inlet 31 and an air outlet 32. The air inlet 31 is located inside the smoke collection hood 1 and communicates with the inlet 11. The check valve 4 is connected to the air outlet 32 ​​and is located inside the main unit 2 and is used to connect to the exhaust duct (not shown in the attached diagram). By placing the fan 3 inside the smoke collection hood 1, the air inlet 31 of the fan 3 is as close as possible to the smoke source generated by the stove below, thus maximizing the utilization of the suction power generated by the fan 3 and improving the smoke extraction effect of the range hood.

[0044] Specifically, in this embodiment, the fan 3 is a volute fan. The fan 3 includes a volute 33 and an impeller 34 located inside the volute 33. Both the air inlet 31 and the air outlet 32 ​​are located within the volute 33. The volute 33 has a spiral configuration, causing the air inlet 31 and the check valve 4 located at the air outlet 32 ​​to be offset in the left-right direction along the range hood. Specifically, the air inlet 31 has a first longitudinal center plane (e.g., ...). Figure 2 As shown in S1), check valve 4 has a second longitudinal center plane (as shown in S1). Figure 2 As shown in S2), along the left-right direction of the range hood, a first longitudinal center plane and a second longitudinal center plane are alternately arranged. The first longitudinal center plane is where the air inlet 31 is located along the left-right direction of the range hood (e.g., as shown in S2). Figure 1The longitudinal plane where the width center is located in the direction indicated by the middle arrow ox) and the second longitudinal center plane where the width center of the stop valve 4 is located in the longitudinal plane along the left and right direction of the range hood.

[0045] In related technologies, to ensure that the airflow velocity is as balanced as possible along the left-right direction of the range hood when the fumes flow through the inlet, the air inlet is centered relative to the inlet of the fume hood in the left-right direction of the range hood, to accommodate the structure of a dual-burner stove. Additionally, to minimize the overall space occupied by the range hood, the main unit is designed to just cover the check valve, meaning the check valve is centered relative to the main unit in the left-right direction of the range hood. However, because the fan uses a volute fan, the fan inlet is off-center relative to the check valve in the left-right direction of the range hood. Since the air inlet is centered relative to the fume hood in the left-right direction of the range hood, and the check valve is centered relative to the main unit in the left-right direction of the range hood, the main unit is also offset relative to the fume hood in the left-right direction of the range hood, affecting the overall aesthetics of the range hood.

[0046] In this embodiment, the main unit 2 is centrally located relative to the smoke collection hood 1 along the left-right direction of the range hood, and the center of the air inlet 31 is spaced apart from the center of the smoke collection hood 1. Specifically, both the main unit 2 and the smoke collection hood 1 have a third longitudinal center plane (e.g., Figure 2 As shown in S3), the third longitudinal center plane is the longitudinal plane where the center of the width of the main unit 2 is located in the left-right direction of the range hood; at the same time, the third longitudinal center plane is also the longitudinal plane where the center of the width of the smoke hood 1 is located in the left-right direction of the range hood, so that the main unit 2 is centered relative to the smoke hood 1 in the left-right direction of the range hood, which can improve the aesthetics of the range hood and meet the aesthetic needs of users.

[0047] In an alternative embodiment, such as Figure 2As shown, along the left-right direction of the range hood, the third longitudinal center plane is located between the first and second longitudinal center planes. On one hand, provided the main unit 2 can cover the check valve 4, the smaller the width of the main unit 2 along the left-right direction of the range hood, the smaller the space occupied by the main unit 2, thus freeing up more space in the cabinet above the range hood, which is advantageous for the range hood. On the other hand, if the main unit 2 can just cover the check valve 4 along the left-right direction of the range hood, it's equivalent to both the check valve 4 and the main unit 2 being centered relative to the smoke collection hood 1 along the left-right direction of the range hood. This would result in the air inlet 31 being offset to its maximum relative to the smoke collection hood 1 along the left-right direction of the range hood, leading to uneven wind speeds when the fumes flow through the inlet 11 of the smoke collection hood 1 along the left-right direction of the range hood. This situation is unfavorable for the range hood. In this embodiment, by placing the third longitudinal center plane between the first and second longitudinal center planes, the air inlet 31 is offset from the smoke hood 1 in the left-right direction of the range hood by a certain amount, and this offset is less than the distance between the first and second longitudinal center planes. This allows the main unit 2 to have a relatively small width while maintaining aesthetics. In addition, when the fumes flow through the inlet 11 of the smoke hood 1, although the wind speed may be uneven in the left-right direction of the range hood, it will not affect the normal suction of the fumes. Therefore, this embodiment is equivalent to a compromise between the above-mentioned advantages and disadvantages.

[0048] In this configuration, the first longitudinal center plane can be positioned to the right of the third longitudinal center plane, and the second longitudinal center plane can be positioned to the left of the third longitudinal center plane, such that the air inlet 31 of the fan 3 is offset to the right relative to the smoke hood 1 in the left-right direction of the range hood; alternatively, the first longitudinal center plane can be positioned to the left of the third longitudinal center plane, and the second longitudinal center plane can be positioned to the right of the third longitudinal center plane, such that the air inlet 31 of the fan 3 is offset to the left relative to the smoke hood 1 in the left-right direction of the range hood.

[0049] Of course, in other embodiments, the check valve 4 and the main unit 2 can also be centered relative to the smoke hood 1 in the left-right direction of the range hood, as needed.

[0050] In an alternative embodiment, such as Figure 2As shown, the distance between the main unit housing 2 and the check valve 4 on one side in the left-right direction does not exceed the set value D. The specific value of the set value D can be set according to the processing accuracy and assembly accuracy of the check valve 4, the smoke hood 1, and the main unit housing 2. For example, the value of D can be 3mm, 2mm, or 1mm. This ensures that the main unit housing 2 and the smoke hood 1 are relatively centered in the left-right direction of the range hood, while minimizing the width of the main unit housing 2.

[0051] In an alternative embodiment, such as Figure 2 As shown, along the left-right direction of the range hood, the width dimension of the main unit 2 is 'a', and the width dimension of the smoke collection hood 1 is 'b', where 74 / 179 ≤ a / b ≤ 86 / 179. This arrangement balances both the advantages and disadvantages mentioned above. Specifically, the value of a / b can be 74 / 179, 75 / 179, 76 / 179, 77 / 179, 78 / 179, 79 / 179, 80 / 179, 81 / 179, 82 / 179, 83 / 179, 84 / 179, 85 / 179, or 86 / 179, etc.

[0052] Additionally, it should be noted that in related technologies, the main unit of some range hoods is also centered relative to the smoke collection hood along the width of the range hood. However, the main unit of these range hoods is usually used to house the fan, and the width of the main unit is not much different from the width of the smoke collection hood. In this embodiment, the width of the main unit 2 is less than half the width of the smoke collection hood 1, and it is only used to house the check valve 4. There is a fundamental difference between the two.

[0053] In one optional embodiment, the value of b is typically 895 mm, and the value of a is between 370 mm and 430 mm. Specifically, a can be 370 mm, 375 mm, 380 mm, 385 mm, 390 mm, 395 mm, 400 mm, 405 mm, 410 mm, 415 mm, 420 mm, 425 mm, or 430 mm, etc. Of course, in other embodiments, the values ​​of a and b can also be set according to actual needs.

[0054] In an alternative embodiment, such as Figure 2As shown, the distance between the first longitudinal center plane and the third longitudinal center plane is c, where 10 / 179 ≤ c / b ≤ 14 / 179. Because the air inlet 31 is offset relative to the fume hood 1 in the left-right direction of the range hood, the airflow velocity along the left-right direction of the range hood will be somewhat uneven when the fumes flow through the inlet 11 of the fume hood 1. This setting ensures that the normal fume extraction of the range hood is not affected, and the extraction effect meets the user's needs. Specifically, the value of c / b can be 10 / 179, 10.5 / 179, 11 / 179, 11.5 / 179, 12 / 179, 12.5 / 179, 13 / 179, 13.5 / 179, or 14 / 179, etc. Of course, in other embodiments, the value of c / b can also be set according to actual needs.

[0055] In one optional embodiment, the value of c is between 50mm and 70mm. Specifically, c can be 50mm, 51mm, 52mm, 53mm, 54mm, 55mm, 56mm, 57mm, 58mm, 59mm, 60mm, 61mm, 62mm, 63mm, 64mm, 65mm, 66mm, 67mm, 68mm, 69mm, or 70mm, etc. Of course, in other embodiments, the value of c can also be set according to actual needs.

[0056] In an alternative embodiment, such as Figure 2 As shown, the distance between the second and third longitudinal center planes along the left-right direction of the range hood is d, where 1 / 8 ≤ d / a ≤ 7 / 40. This arrangement allows the main unit 2 to be relatively centered relative to the smoke collection hood 1 in the left-right direction of the range hood, while maintaining a relatively small width. This achieves a reduction in the space occupied by the main unit 2 while ensuring the aesthetics of the range hood. Specifically, the value of d / a can be 5 / 40, 5.1 / 40, 5.2 / 40, 5.3 / 40, 5.4 / 40, 5.5 / 40, 5.6 / 40, 5.7 / 40, 5.8 / 40, 5.9 / 40, 6 / 40, 6.1 / 40, 6.2 / 40, 6.3 / 40, 6.4 / 40, 6.5 / 40, 6.6 / 40, 6.7 / 40, 6.8 / 40, 6.9 / 40, or 7 / 40, etc. Of course, in other embodiments, the value of d / a can also be set according to actual needs.

[0057] In one optional embodiment, the value of d is between 50mm and 70mm. Specifically, c can be 50mm, 51mm, 52mm, 53mm, 54mm, 55mm, 56mm, 57mm, 58mm, 59mm, 60mm, 61mm, 62mm, 63mm, 64mm, 65mm, 66mm, 67mm, 68mm, 69mm, or 70mm, etc. Of course, in other embodiments, the value of d can also be set according to actual needs.

[0058] In an alternative embodiment, such as Figure 2 As shown, 5 / 6 ≤ d / c ≤ 7 / 6. This setting ensures that the air inlet 31 is offset relative to the smoke hood 1 in the left-right direction of the range hood without affecting the normal smoke extraction effect, and that the main unit 2 is centered relative to the smoke hood 1 in the left-right direction of the range hood. This minimizes the space occupied by the main unit 2. Specifically, the value of d / c can be 5 / 6, 5.1 / 6, 5.2 / 6, 5.3 / 6, 5.4 / 6, 5.5 / 6, 5.6 / 6, 5.7 / 6, 5.8 / 6, 5.9 / 6, 1, 6.1 / 6, 6.2 / 6, 6.3 / 6, 6.4 / 6, 6.5 / 6, 6.6 / 6, 6.7 / 6, 6.8 / 6, 6.9 / 6, or 7 / 6, etc. Of course, in other embodiments, the value of d / c can also be set according to actual needs.

[0059] In an alternative embodiment, such as Figure 3 As shown, the range hood also includes a rectifier 5 disposed within the smoke collection hood 1, along the front-to-back direction of the range hood (e.g., Figure 1 (In the direction indicated by the middle arrow oy), the rectifier 5 is located between the inlet 11 and the air inlet 31. The distance between the rectifier 5 and the air inlet 31 is g, and the distance between the inlet 11 and the air inlet 31 is p, where 0.4 ≤ g / p ≤ 0.6. It can be understood that the distance between any position on the rectifier 5 and the air inlet 31 is between 0.4 and 0.6. This arrangement serves two purposes: firstly, the rectifier 5 rectifies the flowing fumes, allowing the fumes to redistribute their kinetic energy through viscous shearing, eliminating airflow disturbance at the inlet 11 and making the airflow velocities on both sides of the inlet 11 more even; secondly, 0.4 ≤ g / p ≤ 0.6 ensures optimal rectification effect of the rectifier 5. Of course, in other embodiments, the value of g / p can be set according to actual needs.

[0060] In an optional embodiment, the rectifier 5 is specifically a filter screen, which serves both to rectify and filter the oil fumes.

[0061] In an optional embodiment, the rectifier 5 is inclined relative to the air inlet 31, with the top end of the rectifier 5 closer to the air inlet 31 than its bottom end. This arrangement allows for a larger contact area between the rectifier 5 and the fumes, thereby improving the rectification effect and the filtration effect on the fumes. For example, the ratio of the distance between the top end of the rectifier 5 and the air inlet 31 to p is 0.50; the ratio of the distance between the bottom end of the rectifier 5 and the air inlet 31 to p is 0.58.

[0062] In other embodiments, the rectifier 5 may also be arranged parallel to the air inlet 31 and centered between the air inlet 31 and the inlet 11.

[0063] In an alternative embodiment, such as Figures 3 to 5 As shown, the range hood also includes a smoke baffle 6 and a baffle 7 connected to each other. Both the smoke baffle 6 and the baffle 7 are connected to the smoke collection hood 1. The smoke baffle 6 and the baffle 7 together form a smoke inlet chamber 8 and a smoke exhaust port 82 connected to the smoke inlet chamber 8. The smoke exhaust port 82 is connected to the inlet 11. The baffle 7 is provided with a smoke inlet 81 connected to the smoke inlet chamber 8. With this configuration, the cooking fumes enter the smoke inlet 8 through the smoke inlet 81, then enter the smoke collection hood 1 through the inlet 11, and then enter the fan 3 through the rectifier 5 and the smoke inlet 81. Finally, they are discharged to the exhaust pipe through the exhaust outlet 82 and the check valve 4. Therefore, before entering the smoke collection hood 1 and the fan 3, the fumes need to pass through the smoke inlet 8, which is equivalent to extending the path length of the fumes into the fan 3. This allows the fumes to redistribute their kinetic energy through viscous shearing, eliminating airflow disturbance at the smoke inlet 81 and making the airflow speed on both sides of the smoke inlet 81 more even.

[0064] In other embodiments, the smoke baffles 6 and 7 may be omitted as needed, allowing the cooking fumes to enter the smoke hood 1 directly through the inlet 11.

[0065] In an alternative embodiment, such as Figures 3 to 5 As shown, the top of the smoke baffle 6 is rotatably connected to the smoke collection hood 1, the bottom of the baffle 7 is rotatably connected to the smoke collection hood 1, and the top of the baffle 7 is slidably connected to the smoke baffle 6. The smoke baffle 6 can rotate relative to the smoke collection hood 1, allowing it to switch between the open position of the inlet 11 and the closed position of the inlet 11. The volume of the smoke inlet chamber 8 changes as the smoke baffle 6 rotates relative to the smoke collection hood 1. When the smoke baffle 6 is in the open position, the smoke inlet chamber 8 is outside the smoke collection hood 1, and its volume is at its maximum. When the smoke baffle 6 is in the closed position, the smoke inlet chamber 8 is inside the smoke collection hood 1, and its volume is at its minimum. This design allows the smoke baffle 6 to move to the closed position when the range hood is not in use, maintaining the aesthetics of the range hood and reducing space occupation.

[0066] In an optional embodiment, the range hood further includes a linear drive (not shown in the drawings). The body of the linear drive is rotatably connected to the smoke collection hood 1, and the telescopic rod of the linear drive is rotatably connected to the smoke baffle 6. The extension and retraction of the telescopic rod of the linear drive drives the smoke baffle 6 to switch between an open position and a closed position. When the smoke baffle 6 moves, it drives the baffle 7 to move synchronously, so that the volume of the smoke inlet chamber 8 changes synchronously. The linear drive may be an electric actuator, a cylinder, etc.

[0067] In an optional embodiment, the baffle 7 includes a baffle body 71 and a first side plate 72. The first side plate 72 is provided on the left and right sides of the baffle body 71. The smoke baffle 6 includes a smoke baffle body 61 and a second side plate 62. The second side plate 62 is provided on both the left and right sides of the smoke baffle body 61. The smoke inlet 81 is provided on the baffle body 71. When the smoke baffle 6 and the baffle 7 are in a forward-flipped state, the smoke baffle body 61, the second side plate 62, the baffle body 71 and the first side plate 72 together form the smoke inlet chamber 8 and the smoke outlet 82.

[0068] In other embodiments, both the baffle 7 and the smoke baffle 6 can be fixedly connected to the smoke collection hood 1.

[0069] In an optional embodiment, the smoke baffle 6 further includes a flap 63 rotatably connected to the lower end of the smoke baffle body 61. By adjusting the flip angle of the flap 63, a consistently good smoke collection effect can be achieved for fumes in different states. Specifically, a drive motor can also be provided to drive the flap 63 to rotate relative to the smoke baffle body 61. For example, the flap 63 is rotatably connected relative to the smoke baffle body 61 via a rotating shaft. The flap 63 and the rotating shaft are fixedly connected, the rotating shaft is rotatably connected to the smoke baffle body 61, and the motor is drively connected to the rotating shaft. When the motor drives the rotating shaft to rotate, the flip angle of the flap 63 relative to the smoke baffle body 61 is adjusted. In addition, it should be noted that when the smoke baffle 6 is in the closed position, the baffle body 71 and the flap 63 cooperate to close the inlet 11 of the smoke collection hood 1.

[0070] In an optional embodiment, when the smoke baffle 6 is in the open position, the centers of the inlet 11, the air inlet 31, and the smoke inlet 81 are arranged in a triangle. This arrangement causes the flow direction of the fumes to change when passing through the inlet 11 after entering the smoke inlet chamber 8, before flowing towards the air inlet 31 of the fan 3. Therefore, the path length of the fumes entering the fan 3 via a tortuous path is longer than that of fumes entering the fan 3 via a straight path, which is more conducive to the redistribution of kinetic energy through viscous shearing, eliminating airflow disturbance at the smoke inlet 81, and making the airflow velocities on both sides of the smoke inlet 81 more even. Specifically, in this embodiment, the inlet 11 of the smoke hood 1 is approximately located directly in front of the air inlet 31 of the fan 3, and the smoke inlet 81 is located slightly below and in front of the inlet 11 of the smoke hood 1.

[0071] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure involved in this utility model is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

[0072] Furthermore, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this invention. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0073] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A range hood, characterized in that, include: The smoke hood (1) is provided with an inlet (11) for the smoke to enter. The main unit (2) is installed above the smoke collection hood (1) and is centered relative to the smoke collection hood (1) along the left and right direction of the range hood. A fan (3) is installed in the smoke hood (1). The fan (3) has an air inlet (31) and an air outlet (32). The air inlet (31) is located inside the smoke hood (1) and communicates with the inlet (11). Along the left and right direction of the range hood, the center of the air inlet (31) is spaced apart from the center of the smoke hood (1). Check valve (4) is connected to the exhaust port (32) and is located inside the main unit box (2).

2. The range hood according to claim 1, characterized in that, The air inlet (31) has a first longitudinal center plane, the check valve (4) has a second longitudinal center plane, and the main unit (2) and the smoke hood (1) both have a third longitudinal center plane. Along the left and right direction of the range hood, the third longitudinal center plane is located between the first longitudinal center plane and the second longitudinal center plane.

3. The range hood according to claim 2, characterized in that, The width of the main unit (2) is a, and the width of the smoke hood (1) is b, 74 / 179≤a / b≤86 / 179.

4. The range hood according to claim 3, characterized in that, Along the left-right direction of the range hood, the distance between the first longitudinal center plane and the third longitudinal center plane is c, where 10 / 179≤c / b≤14 / 179.

5. The range hood according to claim 4, characterized in that, Along the left-right direction of the range hood, the distance between the second longitudinal center plane and the third longitudinal center plane is d, 1 / 8≤d / a≤7 / 40.

6. The range hood according to claim 5, characterized in that, 5 / 6≤d / c≤7 / 6.

7. The range hood according to claim 1, characterized in that, The range hood also includes a rectifier (5) disposed in the smoke collection hood (1). Along the front-to-back direction of the range hood, the rectifier (5) is located between the inlet (11) and the air inlet (31). The distance between the rectifier (5) and the air inlet (31) is g, and the distance between the inlet (11) and the air inlet (31) is p, where 0.4≤g / p≤0.

6.

8. The range hood according to any one of claims 1-7, characterized in that, The range hood also includes a smoke baffle (6) and a baffle (7) connected to each other, and both the smoke baffle (6) and the baffle (7) are connected to the smoke collection hood (1); The smoke baffle (6) and the baffle (7) together form a smoke inlet cavity (8) and a smoke exhaust port (82) connected to the smoke inlet cavity (8). The smoke exhaust port (82) is connected to the inlet (11). The baffle (7) is provided with a smoke inlet port (81) connected to the smoke inlet cavity (8).

9. The range hood according to claim 8, characterized in that, The top end of the smoke baffle (6) is rotatably connected to the smoke collection hood (1), the bottom end of the baffle (7) is rotatably connected to the smoke collection hood (1), the top end of the baffle (7) is slidably connected to the smoke baffle (6), and the smoke baffle (6) can rotate relative to the smoke collection hood (1) and can switch between the open position of opening the inlet (11) and the closed position of closing the inlet (11); The volume of the smoke inlet chamber (8) changes as the smoke baffle (6) rotates relative to the smoke collection hood (1). When the smoke baffle (6) is in the open position, the smoke inlet chamber (8) is outside the smoke collection hood (1) and the volume of the smoke inlet chamber (8) is the largest. When the smoke baffle (6) is in the closed position, the smoke inlet chamber (8) is inside the smoke collection hood (1) and the volume of the smoke inlet chamber (8) is the smallest.

10. The range hood according to claim 9, characterized in that, When the smoke baffle (6) is in the open position, the center of the inlet (11), the center of the air inlet (31), and the center of the smoke inlet (81) are arranged in a triangle.

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