Range hood

Abstract

The utility model relates to a range hood, which comprises: a housing, the interior of which is hollow to form a cavity with a smoke inlet and a smoke outlet, the smoke outlet being located on the top wall of the housing; the fan system is arranged in the machine shell and used for driving external smoke to enter the cavity from the smoke inlet and be discharged from the smoke outlet; an air outlet channel extending up and down is arranged in the air outlet cover, the air outlet cover is arranged above the machine shell, and a lower end opening of the air outlet cover is in butt joint with the smoke inlet; an annular check ring which protrudes upwards and surrounds the air outlet cover is arranged on the top wall of the machine shell, and the inner circumferential face of the annular check ring is opposite to the edge of the lower end of the corresponding air outlet cover in a spaced mode. A through hole is formed in the position, close to a power piece of the fan system, of the top wall of the machine shell, located in the inner periphery of the annular check ring and communicated with the cavity and the outside. According to the utility model, leaked oil can be prevented from dropping from the casing.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, specifically relating to a range hood. Background Technology

[0002] Most existing range hoods have an exhaust hood located on the top of the casing, corresponding to the air outlet of the fan system. A specific example is the structure disclosed in patent application No. 201710923614.0 (publication number CN109595633A), entitled "A Range Hood." This structure includes a smoke collection hood, a casing mounted above the smoke collection hood, and a fan system housed within the casing. The smoke collection hood has an air inlet, and the casing contains an air duct. The fan system includes a first ternary fan and a second ternary fan connected in parallel. A filter is installed at the bottom of the casing and at the air duct inlet. The filter consists of an inverted cone-shaped body that is smaller at the top and larger at the bottom, with numerous mesh holes. An exhaust hood is located at the air outlet of the fan system. During use, cooking fumes enter the smoke collection hood and are then discharged after passing through the fan system and the exhaust hood.

[0003] Existing range hoods have a sealing gasket between the exhaust hood and the exhaust port of the fan system to prevent oil from seeping out of the casing. However, the sealing gasket is usually made of nitrile rubber, which is prone to failure and oil leakage over time. The leaked oil will accumulate on the casing and even drip down from the casing, affecting the user experience.

[0004] Meanwhile, the temperature of the power components (such as motors) in the fan system will continuously rise when they are working, which will affect the service life of the power components after long-term use. Utility Model Content

[0005] The first technical problem to be solved by this utility model is to provide a range hood that prevents oil from dripping from the casing, in light of the current state of the technology.

[0006] The second technical problem to be solved by this utility model is to provide a range hood that can improve service life.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a range hood, comprising:

[0008] The housing has a hollow interior forming a cavity with a smoke inlet and a smoke outlet, the smoke outlet being located on the top wall of the housing;

[0009] The fan system, located inside the casing, is used to drive external flue gas into the cavity through the smoke inlet and out through the smoke outlet;

[0010] An air outlet hood with an internal air outlet channel extending vertically is located on the top of the housing, and the lower end of the air outlet hood is connected to the smoke inlet.

[0011] Its features are:

[0012] The top wall of the housing has an annular baffle that protrudes upward and surrounds the air outlet hood. The inner circumferential surface of the annular baffle is spaced apart from the lower edge of the corresponding air outlet hood.

[0013] A through hole is provided on the top wall of the housing near the power component of the fan system. The through hole is located inside the annular retaining ring and connects the cavity to the outside.

[0014] The term "closer" as used above refers to relative proximity. For example, when the power component is located in the rear space inside the housing, the through-hole is also positioned rearward. When the power component is located in the front space inside the housing, the through-hole is also positioned forward.

[0015] The annular retaining ring surrounds any leaking oil, preventing it from spreading across the top wall of the casing and dripping down. The oil enclosed within the retaining ring can also return to the casing through the through-hole. Simultaneously, when the fan system is operating, outside air enters the casing through the through-hole. Because the through-hole is close to the power components of the fan system, the incoming outside air promotes airflow near the power components, reducing temperature rise and extending their service life.

[0016] Preferably, the fan system is a centrifugal fan, having an impeller and a motor for driving the impeller to rotate, the motor being the aforementioned power component.

[0017] Furthermore, the edge of the through hole extends downward to form a folded edge, at least partially inclined towards the motor. The inclined folded edge acts as a guide, allowing outside air to flow towards the motor, further reducing the motor's temperature rise.

[0018] Preferably, with the side of the range hood facing the user as the front side, the motor is located at the rear of the cavity, the motor shaft extends forward and is connected to the impeller, and the through holes are located at the rear of the exhaust hood and arranged to the left and right of the motor. Because the through holes are arranged to the left and right of the motor, oil leaks from the through holes can be prevented from dripping onto the motor.

[0019] Preferably, the through hole is a strip extending from left to right, with the left and right edges of the through hole extending downwards at an angle toward the direction of the motor.

[0020] Furthermore, there are at least two through holes, arranged at intervals along the left-right direction. Alternatively, there may be only one through hole.

[0021] Preferably, the outline shape of the annular baffle ring matches the outline shape of the lower end of the air outlet hood, such that the inner circumferential surface of the annular baffle ring is parallel to the edge of the corresponding lower end of the air outlet hood.

[0022] Preferably, the distance between the inner circumferential surface of the annular baffle and the corresponding lower edge of the air outlet hood is not less than 5mm. Because the inner circumferential surface of the annular baffle and the corresponding lower edge of the air outlet hood are spaced apart by a distance greater than or equal to 5mm, the leaked oil can flow evenly within the annular baffle, preventing excessive oil leakage from any one spot from flowing out from the corresponding annular baffle. Furthermore, the 5mm or greater spacing design in this invention ensures that the annular baffle does not interfere with the installation of the air outlet hood.

[0023] In the above embodiments, preferably, the portion of the top wall of the housing located around the air outlet shroud protrudes upward to form the annular retaining ring. That is, the annular retaining ring and the top wall of the housing are integral parts. Alternatively, a retaining ring can be additionally provided on the top wall of the housing, and the retaining ring can be installed on the top wall of the housing by means of magnetic attraction, adhesion, screw connection, etc.

[0024] Furthermore, the cross-section of the annular retaining ring is an upwardly arched arc shape. This facilitates stamping and forming, while the arc-shaped cross-section of the annular retaining ring also effectively intercepts oil.

[0025] Compared with existing technologies, the advantages of this invention are as follows: the annular retaining ring can surround the seeping oil, preventing it from spreading and dripping from the top wall of the casing. Furthermore, the oil surrounded by the annular retaining ring can return to the casing through the through-hole. Simultaneously, when the fan system is operating, outside air can enter the casing through the through-hole. Because the through-hole is close to the power component of the fan system, the outside air entering through the through-hole promotes airflow near the power component, reducing the temperature rise of the power component and extending its service life. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0027] Figure 2 This is a structural schematic diagram from another perspective of an embodiment of the present utility model;

[0028] Figure 3 This is a cross-sectional view of an embodiment of the present utility model (the cross-section is a vertical plane extending from front to back);

[0029] Figure 4 for Figure 3 Enlarged view of section A in the middle;

[0030] Figure 5 This is another sectional view of an embodiment of the present utility model (the sectional view is a vertical plane extending to the left and right);

[0031] Figure 6 for Figure 5 Enlarged view of section B in the middle. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] like Figures 1-6 As shown, this is a preferred embodiment of a range hood according to the present invention. The range hood includes a housing 1, a fan system 2, and an exhaust hood 3.

[0034] With the side of the range hood facing the user as the front side, the inside of the casing 1 is hollow, forming a cavity 10. The front wall of the cavity 10 is provided with a smoke inlet 10a, and the top wall of the cavity 10 is provided with a smoke outlet 10b.

[0035] The fan system is located inside the casing 1 and is used to drive external flue gas into the cavity 10 through the flue gas inlet 10a and out through the flue gas outlet 10b. In this embodiment, the fan system is a conventional centrifugal fan, which has an impeller 20 and a motor 21 for driving the impeller 20 to rotate. The motor 21 is located at the rear of the cavity 10, and the motor shaft 211 extends forward and is connected to the impeller 20.

[0036] The exhaust hood 3 is existing technology. It has an internal air outlet channel that extends vertically. The exhaust hood 3 is located above the housing 1, and its lower end is connected to the smoke inlet 10a. The connection structure is the same as existing technology. Specifically, the lower end of the exhaust hood 3 is connected to the edge of the smoke inlet 10a by screws, which press the lower end of the exhaust hood 3 tightly against the edge of the smoke inlet 10a.

[0037] When the range hood is working, oil may leak from the joint between the exhaust hood 3 and the smoke inlet 10a. To collect the leaked oil, in this embodiment, the portion of the top wall 11 of the housing 1 located around the exhaust hood 3 protrudes upward to form an annular baffle 12 surrounding the exhaust hood 3. The cross-section of the annular baffle 12 is an upwardly arched arc shape, and the overall outline of the annular baffle 12 matches the outline of the lower end of the exhaust hood 3, so that the inner circumferential surface of the annular baffle 12 is parallel to the corresponding lower edge of the exhaust hood 3. Simultaneously, the inner circumferential surface of the annular baffle 12 and the corresponding lower edge of the exhaust hood 3 are spaced apart, and the distance L is not less than 5mm (e.g., 6mm, 7mm, 8mm, etc.). For details, please refer to [link to relevant documentation]. Figure 1 , 2Meanwhile, the annular baffle 12 is located within the inner perimeter of the top wall 11. The annular baffle 12 can surround the seeping oil, preventing the oil from spreading and dripping from the top wall 11 of the housing. In this embodiment, the top wall 11 of the housing 1 has a through hole 13 connecting the cavity 10 to the outside. The through hole 13 is located within the inner perimeter of the annular baffle 12, behind the air outlet shroud 3, and arranged to the left and right of the motor 21. The through hole 13 is a strip extending left and right, with its edges extending downwards to form a folded edge 131. Specifically, the left and right edges of the through hole 13 extend downwards at an angle towards the motor 21 (i.e., to the right), while the front and rear edges extend downwards in a converging manner. This allows the folded edge 131 to define a guide channel that is inclined towards the motor 21, allowing outside air to flow towards the motor 21 through the guide channel, promoting airflow near the motor 21 and reducing motor temperature rise. In this embodiment, there are two through holes 13, which are arranged at intervals along the left and right directions.

[0038] When the fan system 2 is working, the air above the top wall 11 is drawn into the housing 1 under negative pressure. The drawn-in air can simultaneously drive the oil on the top wall 11 into the housing 1 through the through hole 13, and then collect it into the oil cup at the bottom of the housing 1. The oil cup is existing technology and will not be described in detail here.

[0039] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0040] The term "vertical" is also used in the specification and claims of this utility model, meaning basically along the up and down direction, and is not limited to just the vertical direction, but can also be slightly deviated from the vertical direction.

[0041] The term "radial" is also used in the specification and claims of this utility model, meaning basically along the inside and outside direction, and is not limited to the radial direction that passes through the center of the circle, but can also be slightly deviated from the radial direction.

Claims

1. A range hood comprising: a housing (1) having a cavity (10) with an air inlet (10a) and an air outlet (10b) formed in the interior of the housing (1), the air outlet (10b) being located on a top wall (11) of the housing (1); a fan system (2) arranged in the housing (1) for driving ambient air to enter the cavity (10) through the air inlet (10a) and to be discharged through the air outlet (10b); an air outlet cover (3) having an air outlet channel extending upwardly and downwardly in the interior thereof, the air outlet cover (3) being arranged above the housing (1) and the lower end of the air outlet cover (3) being in abutment with the air inlet (10a); characterized in that: the top wall (11) of the housing (1) has an annular retaining ring (12) protruding upwardly and surrounding the air outlet cover (3), the inner circumferential surface of the annular retaining ring (12) being spaced apart from the edge of the lower end of the air outlet cover (3) corresponding thereto; a through hole (13) is arranged on the top wall (11) of the housing (1) near the power component of the fan system (2), the through hole (13) being located in the inner periphery of the annular retaining ring (12) and communicating the cavity (10) with the ambient.

2. The hood according to claim 1, characterized in that: the fan system (2) is a centrifugal fan having an impeller (20) and a motor (21) for driving the impeller (20) to rotate, the motor (21) being the power component mentioned above.

3. The hood according to claim 2, characterized in that: the edge of the through hole (13) extends downwardly to form a folded edge (131), at least a part of the folded edge (131) being inclined toward the motor (21).

4. The hood according to claim 3, characterized in that: the side of the range hood facing the user is defined as the front side, the motor (21) is located on the rear side of the cavity (10), the motor shaft (211) extends forwardly and is connected with the impeller (20), and the through hole (13) is arranged between the motor (21) and the air outlet cover (3) on the left and right sides.

5. The hood according to claim 4, characterized in that: the through hole (13) extends leftwardly and rightwardly in a strip shape, and the left and right side edges of the through hole (13) extend downwardly and incline toward the direction where the motor (21) is located.

6. The hood according to claim 4, characterized in that: there are at least two through holes (13) arranged in the left and right directions.

7. The hood according to claim 1, characterized in that: the profile shape of the annular retaining ring (12) matches the profile shape of the lower end of the air outlet cover (3), so that the inner circumferential surface of the annular retaining ring (12) is parallel to the edge of the lower end of the air outlet cover (3) corresponding thereto.

8. The hood according to claim 1, characterized in that: the spacing distance between the inner circumferential surface of the annular retaining ring (12) and the edge of the lower end of the air outlet cover (3) corresponding thereto is not less than 5 mm.

9. The hood according to any one of claims 1-8, characterized in that: the part of the top wall (11) of the housing (1) located outside the air outlet cover (3) protrudes upwardly to form the annular retaining ring (12).

10. The hood according to claim 9, characterized in that: the cross section of the annular retaining ring (12) is in the shape of a circular arc protruding upwardly.

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