Range hood

Abstract

The utility model relates to a range hood, which comprises a fan frame, a first air inlet, a second air inlet, a first air outlet and a second air outlet, the exhaust fume collecting hood is located below the fan frame, and the bottom of the exhaust fume collecting hood is provided with a main exhaust inlet and auxiliary exhaust inlets located in the left and right sides of the main exhaust inlet; a first air channel and a second air channel which are independent are defined in the fan frame, the first air channel is in fluid communication with the first air inlet and the main air suction opening, and the second air channel is in fluid communication with the second air inlet and the two auxiliary air suction openings. The fan has the advantages that the first air duct and the second air duct which are independent are arranged in the fan frame and correspondingly communicated with the main air suction opening and the auxiliary air suction openings respectively, so that the auxiliary air suction openings in the left side and the right side are provided with the independent air ducts and are not affected by the air ducts of the main air suction opening; therefore, the smoke exhaust process of the auxiliary exhaust inlet has relatively stable air volume and air speed, and the smoke exhaust effect is further ensured.

Description

Technical Field

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

[0002] A range hood is a kitchen appliance for purifying the kitchen environment. Range hoods are generally divided into top - suction range hoods and near - suction range hoods. However, the existing top - suction range hoods generally have only one air inlet in the middle of the bottom, with poor smoke extraction effect and prone to the problem of oil fume escaping from the sides.

[0003] Therefore, the Chinese utility model patent application with the application number CN202221358667.5 (the authorized announcement number: CN217928918U) discloses a T - shaped range hood, including a smoke collecting hood and an exhaust housing. The bottom of the smoke collecting hood is provided with a main smoke gathering structure and an auxiliary smoke gathering structure. The main smoke gathering structure is used to define an inward - concave main smoke gathering cavity, and the auxiliary smoke gathering structure is used to define an inward - concave auxiliary smoke gathering cavity. Both the main smoke gathering cavity and the auxiliary smoke gathering cavity can be used to gather oil fume. Using the main smoke suction port group corresponding to the main smoke gathering cavity and the auxiliary smoke suction port group corresponding to the auxiliary smoke gathering cavity to suck in and smoke at the same time is beneficial to improving the oil fume suction and exhaust efficiency of the T - shaped range hood, and adding an auxiliary smoke gathering structure and an auxiliary smoke suction port group on the left and right sides of the main smoke suction port group can effectively prevent oil fume from escaping from the side. The "A Range Hood" with the application number CN202123352958.1 (the authorized announcement number: CN 217209498U) also makes a similar disclosure.

[0004] However, the range hoods in the above - mentioned patent applications still have certain deficiencies: after the flue gas is inhaled through the above - mentioned auxiliary smoke suction ports, it basically immediately merges into the flow channel of the main smoke suction port, that is, the auxiliary smoke suction ports and the main smoke suction ports basically share the same flow channel. This structural arrangement makes the air volume and air speed of the auxiliary air inlets unstable due to the influence of the flow channel of the main smoke suction port, reducing the oil fume extraction effect.

[0005] Therefore, the existing range hoods still need to be further improved. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide a range hood that can effectively ensure the smoke extraction effect of the middle and left and right suction ports in view of the current situation of the prior art.

[0007] The technical solution adopted by the utility model to solve the above - mentioned technical problem is as follows: A range hood, including:

[0008] A fan frame, inside which is provided a centrifugal fan, and the centrifugal fan has a first air inlet and a second air inlet that are opposite to each other front and back;

[0009] The smoke collecting hood is located below the fan frame, and its bottom has a main air suction opening and auxiliary air suction openings on the left and right sides of the main air suction opening;

[0010] Independent first and second air ducts are defined within the fan frame. The first air duct is in fluid communication with the first air inlet and the main air suction opening, and the second air duct is in fluid communication with the second air inlet and the two auxiliary air suction openings.

[0011] For the connection between the auxiliary air suction openings and the corresponding second flow channels and to reduce the air flow resistance, the first air duct and the second air duct are arranged in sequence in the front - rear direction. The second air duct is located at the rear side of the first air duct. Two guide cavities extending along the front - rear direction are defined within the smoke collecting hood at positions corresponding to the two auxiliary air suction openings. At the left and right sides of the rear part of the top of the smoke collecting hood and at positions corresponding to the fan frame, guide covers are respectively provided. The lower part of the guide cover on the left is in communication with the left guide cavity, and its right part is in communication with the second air duct of the fan frame. The lower part of the guide cover on the right is in communication with the right guide cavity, and its left part is in communication with the second air duct of the fan frame.

[0012] To divert the air flow into the second flow channel of the fan frame, a first guide plate that gradually bends to the right upward is further provided within the guide cover on the left, and a second guide plate that gradually bends to the left upward is further provided within the guide cover on the right.

[0013] As an improvement, a partition plate extending vertically and arranged in the left - right direction is provided within the fan frame. The partition plate is in contact with the centrifugal fan, thereby dividing the space within the fan frame into the first air duct and the second air duct.

[0014] As an improvement, first openings for corresponding communication with the side parts of the two guide covers are respectively formed on the left and right sides of the fan frame, and second openings for corresponding communication with the lower parts of the two guide covers are respectively formed on the left and right sides of the top of the smoke collecting hood.

[0015] To ensure the smoke gathering effect and reduce the escape of oil fume from the side, upward - concave smoke gathering cavities are respectively provided on the left and right sides of the bottom of the smoke collecting hood. Strip - shaped air suction openings communicating with the corresponding guide cavities are formed on the front and rear sides and the side far from the main air suction opening of the two smoke gathering cavities. Each of the strip - shaped air suction openings together constitutes the auxiliary air suction opening.

[0016] To make the air flow processes entering from the three strip - shaped air suction openings in the guide cavities independent to ensure its flow stability, at least two guide partitions are further provided in each of the two guide cavities of the smoke collecting hood. Each guide partition divides the space within the corresponding guide cavity into three guide flow channels, and the three guide flow channels are respectively in communication with the three strip - shaped air suction openings.

[0017] To form the above three diversion channels, the diversion partition plate includes a first partition plate extending in the front-back direction and located between the front strip-shaped air suction opening and the side strip-shaped air suction opening far from the main air suction opening, and a second partition plate extending in the left-right direction and connected below the rear end of the first partition plate.

[0018] To reduce the flow resistance of the air flow during the process of flowing from the diversion cavity of the smoke collecting hood to the inside of the diversion hood, the second partition plate includes a vertical section and an arc section connected in sequence from bottom to top, and the arc section is gradually bent upward from front to back.

[0019] As an improvement, the upper edge of the arc section of the second partition plate extends to a position slightly behind the middle in the front-back direction of the lower port of the diversion hood.

[0020] Compared with the prior art, the advantages of the present utility model are as follows: The bottom of the smoke collecting hood is provided with a main air suction opening at the middle position and auxiliary air suction openings on both sides. Among them, the negative pressure of the main air suction opening in the middle is relatively large, which can gather the rising oil fume towards the middle. During the process of part of the oil fume not captured by the main air suction opening diffusing to both sides, it can be sucked and discharged through the auxiliary air suction openings. Among them, the fan frame has independent first and second air ducts, and the first and second air ducts are respectively corresponding and communicated with the main air suction opening and the auxiliary air suction openings. This enables the auxiliary air suction openings on both sides to have independent air ducts and will not be affected by the air duct of the main air suction opening. Therefore, the smoke exhaust process of the auxiliary air suction openings has relatively stable air volume and air speed, thus ensuring the smoking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structural schematic diagram of the range hood according to an embodiment of the present utility model;

[0022] Figure 2 is a bottom view of the range hood according to an embodiment of the present utility model;

[0023] Figure 3 is an exploded view of the range hood according to an embodiment of the present utility model;

[0024] Figure 4 is a three-dimensional structural schematic diagram of the range hood according to an embodiment of the present utility model with some components omitted;

[0025] Figure 5 is a three-dimensional sectional view of the range hood according to an embodiment of the present utility model cut along the front-back direction;

[0026] Figure 6 is Figure 5 a structural schematic diagram of the range hood with the centrifugal fan omitted in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The present utility model will be further described in detail below in conjunction with the embodiments with reference to the drawings.

[0028] In the description and claims of the present utility model, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present utility model. However, the use of these terms herein is only for the purpose of convenient description and is determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed by the present utility model can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

[0029] Figures 1-6 The figure shows a preferred embodiment of the range hood of the present utility model. The range hood includes a housing and a centrifugal fan 20 provided inside the housing. The housing generally includes a fan frame 10 and a smoke collecting hood 30 provided at the bottom of the fan frame 10. The inner cavity of the fan frame 10 is communicated with the inner cavity of the smoke collecting hood 30. A suction port is formed at the bottom of the smoke collecting hood 30, and external flue gas can enter the smoke collecting hood 30 through the suction port. The centrifugal fan 20 is provided inside the fan frame 10. When the centrifugal fan 20 operates, a negative pressure is generated, and external cooking fumes can be sucked into the smoke collecting hood 30 through the air inlet. The suction port of the smoke collecting hood 30 includes a main suction port 31 located at the middle position and auxiliary suction ports 32 located on the left and right sides of the main suction port 31. An oil net is also provided at the main suction port 31 for filtering cooking fumes.

[0030] On the left and right sides of the bottom of the smoke collecting hood 30, there are also upwardly recessed smoke gathering cavities 300 respectively. The outer peripheral edges of the two smoke gathering cavities 300 are square in shape. Strip-shaped suction ports 320 communicating with corresponding diversion cavities 33 are formed on the front and rear sides and the side away from the main suction port 31 of the smoke gathering cavity 300. Among them, the strip-shaped suction ports 320 on the front and rear sides extend in the left-right direction, while the strip-shaped suction ports 320 on the side away from the main suction port 31 extend in the front-rear direction. The above-mentioned strip-shaped suction ports 320 together constitute the auxiliary suction ports 32 of the smoke collecting hood 30 in this embodiment.

[0031] In order to make the airflow flowing into the diversion chamber 33 from the three strip-shaped air inlets 320 independent during the flowing process to ensure its flow stability, at least two diversion partitions are also provided in each of the two diversion chambers 33 of the smoke collecting hood 30 in this embodiment. Each diversion partition divides the space in the corresponding diversion chamber 33 into three diversion channels 330, and the three diversion channels 330 are respectively corresponding and communicated with the three strip-shaped air inlets 320. Specifically, the diversion partition includes a first partition and a second partition 332. Among them, the first partition 331 extends in the front-rear direction and is located between the front strip-shaped air inlet 320 and the side strip-shaped air inlet 320 far from the main air inlet 31, that is, the front strip-shaped air inlet 320 is separated from the side strip-shaped air inlet 320. More specifically, the front end of the first partition is slightly bent and extends to the corner position at the left front side or the right front side of the smoke collecting hood 30. The second partition 332 is located at the rear side and extends in the left-right direction, and is positioned below the diversion hood 40 on that side. The second partition is connected below the rear end of the first partition 331, and it includes a vertical section 3321 and an arc section 3322 that are connected in sequence from bottom to top. The lower edge of the vertical section 3321 is in contact with the bottom wall of the diversion chamber 33 of the smoke collecting hood 30, and the arc section 3322 is gradually bent upward from front to back, and the upper edge of the arc section 3322 extends to a position slightly behind the middle in the front-rear direction of the lower port of the diversion hood 40, generally selected to be connected in the area between 1 / 5 and 1 / 3 of the thickness of the lower port (middle and rear part) of the diversion hood 40. By adjusting the tail positions of the first partition 331 and the second partition 332 and the gap between the diversion plates in the diversion hood 40, the flow rate of the diversion channel 330 can be adjusted. Preferably, the wind speeds of the three strip-shaped air inlets 320 are adjusted to be the same, that is, the smoking effects of the three strip-shaped air inlets 320 can be ensured.

[0032] See Figure 4, the smoke hood 30 of this embodiment corresponds to the part located on the left and right sides of the fan rack 10, and defines a guide cavity 33 extending forward and backward inside, and the guide cavity 33 is connected to the three strip-shaped air suction ports 320 mentioned above. The top rear side of the smoke hood 30 is located on the left and right sides of the fan rack 10 and is also provided with a guide hood 40. The guide hood 40 is a square box body placed vertically as a whole, which includes a hood body 41 and a guide plate arranged in the hood body 41. The bottom of the hood body 41 and the side facing the fan rack 10 are both open. The bottom openings of the hood bodies 41 of the two guide hoods 40 are connected to the rear side of the guide cavity 33 of the smoke hood 30, and the side openings of the two guide hoods 40 are connected to the internal space of the fan rack 10. Specifically, a partition plate 11 extending vertically and arranged in the left-right direction is provided in the fan frame 10, and the partition plate 11 is fitted and connected with the rear cover plate of the centrifugal fan 20, thereby dividing the space in the fan frame 10 into a first air duct 101 and a second air duct 102. The second air duct 102 is located on the rear side of the first air duct 101, and the first air duct 101 is connected to the first air inlet 21 on the front side of the centrifugal fan 20, and the second air duct 102 is connected to the second air inlet 22 on the rear side of the centrifugal fan 20, that is, the first channel and the second channel are independent of each other.

[0033] A first opening 121 is provided on the left side wall of the fan rack 10 and is connected to the side opening of the left air deflector 40. A second opening 122 is provided on the right side wall of the fan rack 10 and is connected to the side opening of the right air deflector 40. A first air deflector 421 is provided in the air deflector 40 on the left side and is gradually bent to the right from bottom to top. There are three first air deflectors 421, which are arranged in sequence in the left-right direction. A second air deflector 422 is provided in the air deflector 40 on the right side and is gradually bent to the left from bottom to top. There are also three second air deflectors 422, which are arranged in sequence in the left-right direction.

[0034] At the bottom of the smoke collecting hood 30 of this embodiment, a main suction port 31 located at the middle position and auxiliary suction ports 32 located on both sides are provided. Among them, the negative pressure of the main suction port 31 in the middle is relatively large, which can gather the rising oil fumes towards the middle. During the process that some of the oil fumes not captured by the main suction port 31 diffuse to both sides, they can be sucked and discharged through the auxiliary suction ports 32 along the trend. Among them, the blower frame 10 has independent first air duct 101 and second air duct 102. The first air duct 101 and the second air duct 102 are respectively corresponding and communicated with the main suction port 31 and the auxiliary suction ports 32. This enables the auxiliary suction ports 32 on both sides to have independent air ducts and will not be affected by the air duct of the main suction port 31. Thus, the smoke exhaust process of the auxiliary suction ports 32 has relatively stable air volume and air speed, and further ensures the smoking effect. In addition, through reasonable layout and design of each diversion flow channel 330 in the diversion cavity 33 and each diversion plate in the diversion hood 40, the flow resistance of the flue gas entering from the auxiliary suction ports 32 is reduced, the flow loss is reduced, and the oil fume suction effect is improved.

[0035] The "fluid communication" referred to in the present utility model refers to the spatial position relationship between two components or parts (hereinafter uniformly referred to as the first part and the second part respectively), that is, a fluid (gas, liquid or a mixture of both) can flow along a flow path from the first part and / or be transported to the second part. It can be that the first part and the second part are directly connected and communicated, or it can be that the first part and the second part are indirectly connected through at least one third party. The third party can be a fluid passage such as a pipe, a channel, a conduit, a diversion member, a hole, a groove, etc., or a chamber allowing the fluid to flow through or a combination of the above.

Claims

1. An oil fume suction machine, comprising: A fan frame (10) with a centrifugal fan (20) disposed therein. The centrifugal fan (20) has a first air inlet (21) and a second air inlet (22) which are opposite to each other in the front and rear directions; A smoke collecting hood (30) located below the fan frame (10). The bottom of the smoke collecting hood (30) has a main air suction opening (31) and auxiliary air suction openings (32) located on the left and right sides of the main air suction opening (31); It is characterized in that: independent first air duct (101) and second air duct (102) are defined within the fan frame (10). The first air duct (101) is in fluid communication with the first air inlet (21) and the main air suction opening (31), and the second air duct (102) is in fluid communication with the second air inlet (22) and the two auxiliary air suction openings (32).

2. The range hood according to claim 1, wherein: The first air duct (101) and the second air duct (102) are arranged in sequence in the front and rear directions. The second air duct (102) is located at the rear side of the first air duct (101). Two diversion cavities (33) both extending in the front and rear directions are defined within the smoke collecting hood (30) at positions corresponding to the two auxiliary air suction openings (32). At the left and right sides of the top rear side of the smoke collecting hood (30) which are located at the left and right sides of the fan frame (10), diversion covers (40) are respectively provided. The lower part of the diversion cover (40) on the left is connected to the left diversion cavity (33), and its right part is connected to the second air duct (102) of the fan frame (10). The lower part of the diversion cover (40) on the right is connected to the right diversion cavity (33), and its left part is connected to the second air duct (102) of the fan frame (10).

3. The range hood according to claim 2, wherein: A first diversion plate (421) which is gradually bent to the right from bottom to top is further provided within the diversion cover (40) on the left. A second diversion plate (422) which is gradually bent to the left from bottom to top is further provided within the diversion cover (40) on the right.

4. The range hood according to claim 2, wherein: A partition plate (11) which extends vertically and is arranged in the left and right directions is provided within the fan frame (10). The partition plate (11) is in contact with the centrifugal fan (20), thereby dividing the space within the fan frame (10) into a first air duct (101) and a second air duct (102).

5. The range hood according to claim 4, wherein: First openings (121) for corresponding communication with the side parts of the two diversion covers (40) are respectively formed on the left and right sides of the fan frame (10). Second openings (122) for corresponding communication with the lower parts of the two diversion covers (40) are respectively formed on the left and right sides of the top of the smoke collecting hood (30).

6. The range hood according to any one of claims 2 to 5, characterized in that: On the left and right sides of the bottom of the smoke collecting hood (30), smoke gathering cavities (300) which are recessed upward are respectively provided. Strip-shaped air suction openings (320) which are connected to the corresponding diversion cavities (33) are formed on the front and rear sides and the side away from the main air suction opening (31) of the two smoke gathering cavities (300). The strip-shaped air suction openings (320) together constitute the auxiliary air suction openings (32).

7. The range hood according to claim 6, characterized in that: At least two flow guiding partitions are further provided in each of the two flow guiding cavities (33) of the smoke collecting hood (30), and each flow guiding partition divides the space in the corresponding flow guiding cavity (33) into three flow guiding channels (330), and the three flow guiding channels (330) are respectively in corresponding communication with the three strip-shaped air suction openings (320).

8. The range hood according to claim 7, wherein: The flow guiding partition includes a first partition (331) extending in the front-rear direction and located between the front strip-shaped air suction opening (320) and the side strip-shaped air suction opening (320) far from the main air suction opening (31), and a second partition extending in the left-right direction and connected below the rear end of the first partition (331).

9. The range hood according to claim 8, wherein: The second partition (332) includes a vertical section (3321) and an arc section (3322) connected in sequence from bottom to top, and the arc section (3322) is gradually bent upward from front to back.

10. The range hood according to claim 9, characterized in that: The upper edge of the arc section (3322) of the second partition (332) extends to a position slightly behind the middle in the front-rear direction of the lower port of the flow guiding hood (40).

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