Range hood

Abstract

The invention relates to a range hood, which comprises a fan frame (1); the fan system (2) is arranged in the fan frame (1), and an oil discharge port (20) for discharging oil in the fan system (2) is formed in the bottom of the fan system (2); the oil guide groove (3) is formed below the fan system (2) in the front-back direction, and the bottom wall (31) of the oil guide groove (3) inclines downwards from front to back and is used for receiving oil flowing down from an oil discharge outlet (20); and the downward inclination angle of the bottom wall (31) of the oil guide groove (3) is adjustable. The downward inclination angle of the bottom wall of the oil guide groove can be adjusted according to the oil smoke amount, and then the speed of oil passing through the oil guide groove is controlled, so that the risk that the oil is accumulated in the oil guide groove due to the low flowing speed under the high-strength working condition is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of kitchen appliances, and particularly relates to a range hood. Background Art

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

[0003] For example, the Chinese utility model patent "An oil guide groove assembly for a range hood and a range hood" (authorization announcement number CN218096105U) with application number 202221396308.9 includes a fan frame, a fan system arranged on the inner side of the fan frame, and an oil guide groove assembly. The oil guide groove assembly is arranged on the inner side of the fan frame along the front and rear direction of the fan frame. The bottom of the fan system is provided with a fan system oil drain port for discharging the inner oil of the fan system, and the oil guide groove assembly is received below the fan system oil drain port.

[0004] The oil guide trough assembly relies on gravity to guide the oil into the oil cup below. However, under high-intensity operating conditions (such as when a range hood draws in a large amount of oil smoke), if the oil flows through the oil guide trough too slowly, some of the oil may solidify prematurely and adhere to the inner wall of the oil guide trough, preventing the oil from flowing into the oil cup.

[0005] To prevent oil from adhering to the inner wall of the oil guide groove, existing technologies have applied an oil-repellent coating or covered it with an oil-absorbing film to reduce oil residue and facilitate cleaning. While the oil-absorbing film can block oil stains in the short term, it requires frequent replacement and is costly. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a range hood in view of the current status of the existing technology, so as to reduce the risk of oil accumulation in the oil guide groove.

[0007] The second technical problem to be solved by the present invention is to provide a range hood capable of adjusting the speed of oil passing through the oil guide groove according to working conditions.

[0008] The technical solution adopted by the present invention to solve the first technical problem is: a range hood, comprising:

[0009] Wind rack;

[0010] A fan system is provided in the fan frame, wherein the bottom of the fan system is provided with an oil drain port for draining the oil in the fan system;

[0011] An oil guide groove with an upward notch is provided below the fan system along the front-to-back direction, and the bottom wall of the oil guide groove is inclined downward from front to back, for receiving the oil flowing down from the oil drain port;

[0012] Its characteristics are:

[0013] The downward inclination angle of the bottom wall of the oil guide groove is adjustable.

[0014] The downward inclination angle of the bottom wall of the oil guide groove can be adjusted according to the amount of oil smoke, thereby controlling the speed of oil passing through the oil guide groove, thereby reducing the risk of oil accumulating in the oil guide groove due to slow flow speed under high-intensity working conditions.

[0015] In order to make the downward inclination angle of the bottom wall of the oil guide groove adjustable, preferably, the bottom wall of the oil guide groove is arranged in a manner that it can deflect up and down around its rear side.

[0016] Preferably, under the action of an external force, the bottom wall of the oil guide groove deflects upward to increase its downward inclination angle, and after the external force disappears, the bottom wall of the oil guide groove deflects downward to an initial position.

[0017] The present invention can provide the aforementioned external force by additionally providing a motor or other power component. Furthermore, the range hood includes a fume hood positioned below the fan frame. The fume hood is provided with a fume inlet fluidically connected to the fan system. The fume flow flowing upward through the inlet into the fume hood provides the aforementioned external force. Specifically, the present invention utilizes the upward flow of fume to drive the oil guide trough to rotate upward, thereby increasing its downward inclination angle. After the range hood is shut down, the oil guide trough rotates downward under its own weight, thus eliminating the need for additional power components.

[0018] Furthermore, the speed of the fan in the fan system can be adjusted to a first speed and a second speed greater than the first speed, so that the external force exerted on the bottom wall of the oil guide groove by the oil smoke airflow flowing upward into the smoke hood through the smoke inlet is different, and the downward tilt angle of the bottom wall of the oil guide groove at the first speed is smaller than the downward tilt angle of the bottom wall of the oil guide groove at the second speed. That is, the downward tilt angle of the oil guide groove is different under different wind forces. Under high-intensity working conditions, the fan speed is higher, and correspondingly, the oil guide groove can be driven to deflect upward by a larger angle; under low-intensity working conditions, the fan speed is lower, and the oil guide groove can be driven to deflect upward by a smaller angle. That is, the oil guide groove design of the present invention can match the oil guide operation under different fan speeds.

[0019] In order to enable the bottom wall of the oil guide groove to rotate up and down, the oil guide groove can be integrally rotatably connected to the bottom of the fan system. Preferably, the oil guide groove comprises the aforementioned bottom wall, and side walls located on the left and right sides of the bottom wall and extending upward. The lower edges of the two side walls fold back and extend toward the inner center bottom wall to form a connecting wall. The inner sides of the two connecting walls are connected to the left and right side edges of the corresponding bottom wall via respective telescopic walls that can be expanded upward or folded downward. In addition, when the telescopic walls are expanded, the downward inclination angle of the bottom wall of the oil guide groove is greater than the downward inclination angle of the bottom wall of the oil guide groove when the telescopic walls are folded. That is, in the oil guide groove, the upward rotation of the bottom wall is achieved by the expansion of the telescopic walls, and when the bottom wall rotates downward, the telescopic walls fold. During the folding process of the telescopic walls, the oil on the telescopic walls can be squeezed out, achieving self-cleaning of the telescopic walls.

[0020] Preferably, the bottom wall is located above the connecting wall, thereby forming a downwardly opening concave cavity between the bottom wall, the telescopic wall, and the connecting wall. The design of the concave cavity allows a portion of the upwardly rising oil fume flow to enter the concave cavity when the range hood is in operation, pushing the bottom wall upward, thereby effectively driving the bottom wall to rotate upward.

[0021] Furthermore, the telescopic wall is made of elastic material and always has a tendency to fold downward.

[0022] In each of the above schemes, preferably, an oil cup is further included, which is provided at the lower rear side of the oil guide groove and is used to receive the oil in the oil guide groove.

[0023] Compared with the prior art, the advantage of the present invention is that the present invention can adjust the downward inclination angle of the bottom wall of the oil guide groove according to the amount of oil smoke, thereby controlling the speed of the oil passing through the oil guide groove, so as to reduce the risk of oil accumulation in the oil guide groove due to slow flow speed under high-intensity working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A partial structural diagram of an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of a portion of the structure of an embodiment of the present invention from another perspective;

[0026] Figure 3 A cross-sectional view of a portion of the structure of an embodiment of the present invention;

[0027] Figure 4 Schematic diagram of the structure of the oil guide groove of an embodiment of the present invention (the telescopic wall is in a folded state);

[0028] Figure 5 Schematic diagram of the structure of the oil guide groove in another perspective of an embodiment of the present invention (the telescopic wall is in a folded state);

[0029] Figure 62 is a cross-sectional view of an oil guide groove according to an embodiment of the present invention (the telescopic wall is in a folded state);

[0030] Figure 7 2 is a cross-sectional view of an oil guide groove according to an embodiment of the present invention (the telescopic wall is in an expanded state). DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0032] like Figures 1 to 7 FIG. 1 shows a preferred embodiment of a range hood according to the present invention. The range hood comprises a fan frame 1 , a fan system 2 , an oil guide groove 3 , a fume collecting hood 4 , and an oil cup.

[0033] The fan frame 1 is of the prior art, and a fan system 2 (which is an existing centrifugal fan) is provided inside the fan frame 1 . An oil drain port 20 for draining the oil in the fan system 2 is provided at the bottom of the fan system 2 .

[0034] The smoke collecting hood 4 is arranged at the lower side of the fan frame 1 , and a smoke inlet 40 in fluid communication with the fan system 2 is opened on the front side wall of the smoke collecting hood 4 .

[0035] The oil guide groove 3 is arranged with its notch facing upwards in the front-to-back direction inside the smoke hood 4 and below the fan system 2. From front to back, the bottom wall 31 of the oil guide groove 3 is tilted downwards to receive the oil flowing from the oil drain port 20. At the same time, the bottom wall 31 of the oil guide groove 3 is arranged to be able to deflect up and down around its rear side so that the downward tilt angle of the bottom wall 31 of the oil guide groove 3 is adjustable. Figure 7 As shown, under the action of external force (the external force is provided by the oil smoke airflow flowing upward into the smoke collecting hood 4 through the smoke inlet 40), the bottom wall 31 of the oil guide groove 3 deflects upward and increases its downward inclination angle. At this time, the inclination angle of the bottom wall 31 relative to the horizontal plane is a2; Figure 5 、 6 As shown, after the external force disappears, the bottom wall 31 of the oil guide groove 3 deflects downward to its initial position. At this point, the bottom wall 31 is tilted at an angle a1 relative to the horizontal plane, where a1 is smaller than a2. In this embodiment, the oil guide groove 3 comprises the aforementioned bottom wall 31 and side walls 32 extending upwardly and located on either side of the bottom wall 31. The lower edges of the two side walls 32 fold backward and extend toward the center of the bottom wall 31 to form connecting walls 33. The inner edges of the two connecting walls 33 are connected to the corresponding left and right sides of the bottom wall 31 via respective telescopic walls 34 that can be expanded or folded downward. Each telescopic wall 34 is fan-shaped, made of an elastic material, and has a tendency to fold downward. Furthermore, the downward tilt angle of the bottom wall 31 of the oil guide groove 3 when the telescopic walls 34 are expanded is greater than the downward tilt angle of the bottom wall 31 when the telescopic walls 34 are collapsed. The bottom wall 31 is located above the connecting walls 33, thereby forming a downward-opening concave cavity 30 between the bottom wall 31, the telescopic walls 34, and the connecting walls 33.

[0036] At the same time, in this embodiment, the speed of the fan in the fan system 2 can be adjusted to a first speed and a second speed greater than the first speed, so that the external force exerted on the bottom wall 31 of the oil guide groove 3 by the oil fume airflow flowing upward into the smoke collection hood 4 through the smoke inlet 40 is different, and the downward inclination angle of the bottom wall 31 of the oil guide groove 3 at the first speed is smaller than the downward inclination angle of the bottom wall 31 of the oil guide groove 3 at the second speed.

[0037] The above-mentioned oil cup is a prior art, which is arranged at the lower rear side of the oil guide groove 3 and is used to receive the oil in the oil guide groove 3.

[0038] When the fan presents different wind speeds, the telescopic wall 34 of the oil guide groove 3 will elastically and adaptively expand and contract due to the action of wind, so that the bottom wall 31 will present different angles. When the wind speed is fast, the bottom wall 31 of the guide groove 3 will present a larger angle, which will make the oil flow to the oil cup more quickly, thereby realizing the adaptive adjustment of the angle of the bottom wall of the guide groove under different wind speeds to control the flow rate of the oil diversion; at the same time, during the operation of the range hood and when the range hood stops working, the dynamic balance of gravity and wind speed will cause the telescopic wall 34 of the oil guide groove to elastically and adaptively expand and contract, thereby squeezing out the oil, reducing the risk of oil aggregation and solidification, and improving the service life.

[0039] In the present specification and claims, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Because the embodiments disclosed herein can be arranged in various orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A range hood comprising: Wind rack (1); A fan system (2) is provided in a fan frame (1), wherein the bottom of the fan system (2) is provided with an oil drain port (20) for draining oil in the fan system (2); An oil guide groove (3) with an upward notch is provided below the fan system (2) along the front-to-back direction, and a bottom wall (31) of the oil guide groove (3) is inclined downward from front to back, for receiving oil flowing down from the oil discharge port (20); Its characteristics are: The downward tilt angle of the bottom wall (31) of the oil guide groove (3) is adjustable.

2. The range hood according to claim 1, characterized in that: The bottom wall (31) of the oil guide groove (3) is arranged in a manner that it can deflect up and down around its rear side.

3. The range hood according to claim 2, characterized in that: Under the action of external force, the bottom wall (31) of the oil guide groove (3) deflects upward to increase its downward tilt angle; after the external force disappears, the bottom wall (31) of the oil guide groove (3) deflects downward to its initial position.

4. The range hood according to claim 3, characterized in that: The range hood further comprises a smoke collecting hood (4) which is arranged on the lower side of the fan frame (1), and a smoke inlet (40) which is in fluid communication with the fan system (2) is provided on the smoke collecting hood (4). The oil smoke airflow flowing upward into the smoke collecting hood (4) through the smoke inlet (40) provides the above-mentioned external force.

5. The range hood according to claim 4, characterized in that: The rotation speed of the fan in the fan system (2) can be adjusted to a first rotation speed and a second rotation speed greater than the first rotation speed, so that the external force exerted on the bottom wall (31) of the oil guide groove (3) by the oil smoke airflow flowing upward into the smoke collecting hood (4) through the smoke inlet (40) is different, and the downward inclination angle of the bottom wall (31) of the oil guide groove (3) at the first rotation speed is smaller than the downward inclination angle of the bottom wall (31) of the oil guide groove (3) at the second rotation speed.

6. The range hood according to claim 3, characterized in that: The oil guide groove (3) comprises the above-mentioned bottom wall (31), and side walls (32) located on the left and right sides of the bottom wall (31) and extending upward. The lower edges of the two side walls (32) are folded backward and extend toward the bottom wall (31) at the center to form a connecting wall (33). The inner sides of the two connecting walls (33) are connected to the left and right side edges of the corresponding bottom wall (31) through respective telescopic walls (34) that can be expanded upward or folded downward. In addition, the downward inclination angle of the bottom wall (31) of the oil guide groove (3) in the expanded state of the telescopic walls (34) is greater than the downward inclination angle of the bottom wall (31) of the oil guide groove (3) in the folded state of the telescopic walls (34).

7. The range hood according to claim 6, characterized in that: The bottom wall (31) is located above the connecting wall (33), so that a concave cavity (30) with an opening facing downward is formed between the bottom wall (31), the telescopic wall (34) and the connecting wall (33).

8. The range hood according to claim 6, characterized in that: The telescopic wall (34) is made of elastic material and always has a tendency to fold downward.

9. The range hood according to any one of claims 1 to 8, characterized in that: It also includes an oil cup, which is arranged at the lower rear side of the oil guide groove (3) and is used to receive the oil in the oil guide groove (3).

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