Range hood

Abstract

The utility model provides a range hood which comprises an upper shell and an air inlet plate, the lower end of the upper shell is open, the air inlet plate is connected to the lower end of the upper shell and blocks an opening in the lower end of the upper shell, a containing cavity is defined by the upper shell and the air inlet plate, an air inlet is formed in the air inlet plate, and the containing cavity is communicated with the outside through the air inlet. The range hood further comprises a supporting plate, the supporting plate is arranged in the containing cavity and divides the containing cavity into an upper air inlet cavity and a lower air inlet cavity, a ventilation opening is formed in the supporting plate, and the upper air inlet cavity and the lower air inlet cavity are communicated through the ventilation opening. The air inlet plate comprises a turnup, and the turnup extends from the hole wall of the air inlet to the ventilation opening in the axis direction of the air inlet and partially extends into the ventilation opening. And high-speed smoke entering from the air inlet does not make contact with low-speed air in the lower air inlet cavity, so that abnormal sound generated by contact of high-speed airflow and low-speed airflow at the turnup is avoided, noise is reduced, and user experience is improved.

Description

Technical Field

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

[0002] At present, some top-suction range hoods have visible air inlets or grilles. In order to prevent oil from accumulating inside the cabinet and flowing out through the air inlets or grilles, flanges are set on the edges of the air inlets or grilles toward the inside of the cabinet. However, when the range hood is working, high-speed air is entering on one side of the flange, and low-speed air is entering on the other side. When the high-speed airflow and the low-speed airflow come into contact at the flange, they produce sound. When the relative speeds of the two are large, the sound will be even louder, causing a bad experience for users. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a range hood to overcome the defect in the prior art that high-speed airflow and low-speed airflow on both sides of the air inlet flange come into contact with each other to produce abnormal noise.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A range hood comprises an upper shell and an air inlet plate, the lower end of the upper shell is open, the air inlet plate is connected to the lower end of the upper shell and blocks the opening at the lower end of the upper shell, the upper shell and the air inlet plate form a accommodating cavity, the air inlet plate is provided with an air inlet, the accommodating cavity is connected with the outside through the air inlet, the range hood also comprises a support plate, the support plate is arranged in the accommodating cavity and divides the accommodating cavity into an upper air inlet cavity and a lower air inlet cavity, the support plate is provided with a vent, the vent connects the upper air inlet cavity and the lower air inlet cavity; the air inlet plate comprises a flange, the flange extends from the hole wall of the air inlet along the axial direction of the air inlet toward the direction of the vent and partially extends into the vent.

[0006] In the present solution, the accommodating cavity is divided into an upper air inlet cavity and a lower air inlet cavity by a support plate, and the flange of the air inlet is extended toward the support plate and partially extended into the vent, so that the high-speed smoke entering from the air inlet directly enters the upper air inlet cavity through the vent on the inner side of the flange, and does not come into contact with the low-speed air in the lower air inlet cavity. The upper air inlet cavity is closer to the impeller than the lower air inlet cavity, and the air flow rate in the upper air inlet cavity is greater than the air flow rate in the lower air inlet cavity, that is, the difference between the air flow rate in the upper air inlet cavity and the smoke flow rate entering the upper air inlet cavity through the air inlet and the vent is small, thereby reducing the possibility of abnormal noise generated by the contact between high-speed airflow and low-speed airflow at the flange, reducing noise, and improving user experience.

[0007] Preferably, the support plate includes a wind shield ring plate, the wind shield ring plate surrounds the vent, the lower end of the wind shield ring plate extends toward the air inlet and is sleeved on the outer periphery of the flange.

[0008] In this solution, by setting a wind shield ring plate sleeved on the outer periphery of the flange, the high-speed smoke inside the flange is further blocked from contacting the low-speed gas in the lower air inlet cavity, ensuring that no abnormal noise occurs. The double-layer structure of one layer of flange and one layer of wind shield ring plate increases the path length that the smoke needs to pass through from the inside of the flange to the lower air inlet cavity, and the smoke needs to bend twice to flow out of the double-layer structure, thereby increasing the difficulty of smoke escape.

[0009] Preferably, the wind shielding ring plate and the flange form a first gap in the radial direction of the wind shielding ring plate.

[0010] In this solution, the wind shield ring plate and the flange have a first gap, and the oil stains condensed in the upper air inlet cavity flow into the first gap along the wind shield ring plate, avoiding directly flowing out of the air inlet through the flange and dripping onto the stove, thereby improving the cleanliness and thus improving the user experience.

[0011] Preferably, a second gap is formed between the wind shielding ring plate and the inner wall surface of the air inlet plate in the axial direction of the air inlet.

[0012] In this solution, the oil stains in the first gap flow into the lower air inlet cavity through the second gap, thereby avoiding accumulation in the first gap and making it difficult to clean.

[0013] Preferably, in the width direction of the range hood, the air inlet plate is arranged to be inclined downward from front to back, and an oil drip groove is arranged at the rear end of the air inlet plate. The range hood also includes an oil collecting box, which is connected to the upper shell body and is arranged correspondingly below the oil drip groove.

[0014] In this solution, the air inlet plate is tilted downward from front to back, and an oil drip groove and an oil collecting box are arranged at the end. The oil flowing out through the second gap flows to the rear end of the air inlet plate under the action of its own gravity, and enters the oil collecting box through the oil drip groove, which facilitates the collection and cleaning of the oil and improves the user experience.

[0015] Preferably, the upper end of the wind shielding ring plate extends towards the direction close to the impeller.

[0016] In the present scheme, the upper end of the wind shield ring plate extends toward the impeller, and the flue gas passing through the inner side of the wind shield ring plate is closer to the impeller and is attracted more strongly, which facilitates the flue gas to flow toward the impeller under the action of the impeller, reduces the contact between the air inside the wind shield ring plate and the air in the upper air inlet chamber, and further reduces the possibility of abnormal noise.

[0017] Preferably, the support plate is provided with reinforcing ribs.

[0018] In this solution, reinforcing ribs are added to the support plate to increase the strength of the support plate and to increase support for the range hood, thereby improving the structural strength of the entire range hood.

[0019] Preferably, the air inlet plate is a flat plate.

[0020] In this solution, the flat air inlet plate can significantly reduce the cleaning dead corners of the range hood and reduce the difficulty of cleaning. In addition, due to the presence of the support plate, the structural strength of the range hood meets the requirements.

[0021] Preferably, the air inlet includes a left air inlet, and the left air inlet is arranged on the left side of the range hood; and / or, the air inlet includes a right air inlet, and the right air inlet is arranged on the right side of the range hood.

[0022] In this solution, by providing a left air inlet and / or a right air inlet, it is possible to prevent oil smoke from overflowing from the left side and / or the right side of the range hood, thereby increasing the range and effect of oil smoke suction.

[0023] Preferably, when the air inlet includes the left air inlet, the left air inlet is 15-20 mm away from the left side of the range hood; and / or, when the air inlet includes the right air inlet, the right air inlet is 15-20 mm away from the right side of the range hood.

[0024] In this solution, the above structure is used to reduce the dead corners formed by the high-speed airflow flowing in the range hood accommodating chamber. Reducing the dead corners means reducing the airflow vortex at the dead corners, thereby reducing the air resistance.

[0025] The positive progressive effect of the present invention is that the present invention divides the accommodating chamber into an upper air inlet chamber and a lower air inlet chamber through a support plate, so that the flange of the air inlet extends toward the support plate and partially extends into the vent, so that the high-speed smoke entering from the air inlet does not come into contact with the low-speed air in the lower air inlet chamber, and the upper air inlet chamber is closer to the impeller than the lower air inlet chamber, and the air flow rate in the upper air inlet chamber is greater than the air flow rate in the lower air inlet chamber, that is, the air flow rate in the upper air inlet chamber is relatively small compared to the smoke flow rate entering the upper air inlet chamber through the air inlet and the vent, thereby solving the abnormal noise generated by the contact between the high-speed airflow and the low-speed airflow at the flange, reducing noise, and improving user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure is a schematic diagram of the internal structure of a smoke box of a range hood according to an embodiment of the utility model.

[0027] Figure 2 It is a partial cross-sectional view of a range hood according to an embodiment of the utility model.

[0028] Figure 3This is a partial enlarged view of a range hood according to an embodiment of the utility model.

[0029] Figure 4 The figure is a bottom view of a range hood according to an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] Air inlet plate 100

[0032] First air inlet 101

[0033] Left air inlet 102

[0034] Right air inlet 103

[0035] Flanging 104

[0036] Lower air inlet cavity 105

[0037] Upper air inlet cavity 106

[0038] Oil drip tank 107

[0039] Air intake panel 108

[0040] Support plate 200

[0041] Wind shield plate 201

[0042] Vent 202

[0043] First gap 203

[0044] Second gap 204

[0045] Upper shell 300

[0046] Oil box 400 DETAILED DESCRIPTION

[0047] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0048] like Figure 1-Figure 3 As shown, this embodiment discloses a range hood, including an upper shell 300, an air inlet plate 100 and a support plate 200, the lower end of the upper shell 300 is open, the air inlet plate 100 is connected to the lower end of the upper shell 300 and blocks the opening of the lower end of the upper shell 300, the upper shell 300 and the air inlet plate 100 form a accommodating cavity, the air inlet plate 100 is provided with an air inlet, and the accommodating cavity is connected to the outside through the air inlet.

[0049] like Figure 1 , 2As shown, the support plate 200 is arranged in the accommodating cavity, and the accommodating cavity is divided into an upper air inlet cavity 106 and a lower air inlet cavity 105. The upper air inlet cavity 106 is close to the impeller of the range hood. The impeller of the range hood generates a strong airflow by rotation, and the oil smoke near the stove is sucked into the range hood through the air inlet, and finally discharged through the smoke exhaust duct. The lower air inlet cavity 105 is close to the lower part of the range hood and is connected with the outside through the air inlet. A vent 202 is opened on the support plate 200, and the vent 202 passes through the support plate 200 and connects the upper air inlet cavity 106 and the lower air inlet cavity 105.

[0050] like Figure 2 , 3 As shown, the air inlet plate 100 includes a flange 104 , which extends from the hole wall of the air inlet along the axis direction of the air inlet toward the vent 202 and partially extends into the vent 202 .

[0051] In this embodiment, a support plate 200 is provided to divide the accommodating chamber into an upper air inlet chamber 106 and a lower air inlet chamber 105, and the flange 104 of the air inlet extends toward the support plate 200 and partially extends into the vent 202, so that the high-speed smoke entering from the air inlet does not come into contact with the low-speed air in the lower air inlet chamber 105, and the upper air inlet chamber 106 is closer to the impeller than the lower air inlet chamber 105. The air flow rate in the upper air inlet chamber 106 is greater than the air flow rate in the lower air inlet chamber 105, that is, the air flow rate in the upper air inlet chamber 106 is relatively small compared to the smoke flow rate entering the upper air inlet chamber 106 through the air inlet and the vent 202, thereby solving the abnormal sound generated by the contact between the high-speed airflow and the low-speed airflow at the flange 104, reducing noise, and improving user experience.

[0052] like Figure 3 As shown, the support plate 200 includes a wind shield ring plate 201, which encloses a vent 202. The lower end of the wind shield ring plate 201 extends toward the air inlet and is sleeved on the outer periphery of the flange 104. By setting the wind shield ring plate 201 to be sleeved on the outer periphery of the flange 104, the high-speed smoke inside the flange 104 is further blocked from contacting with the low-speed gas in the lower air inlet chamber 105, ensuring that no abnormal noise occurs. The double-layer structure of one layer of flange 104 and one layer of wind shield ring plate 201 increases the path length that the smoke needs to pass through from the inner side of the flange 104 to the lower air inlet chamber 105, and the smoke needs to bend twice to flow out of the double-layer structure, thereby increasing the difficulty of smoke escape. In other alternative embodiments, the upper end of the wind shield ring plate 201 can also extend in the direction close to the impeller. The area of ​​contact between the air inside the wind shield ring plate 201 and the air in the upper air inlet chamber 106 is reduced, further reducing the possibility of abnormal noise.

[0053] like Figure 3As shown, the wind shield ring plate 201 and the flange 104 form a first gap 203 in the radial direction of the wind shield ring plate 201, and the wind shield ring plate 201 and the inner wall surface of the air inlet plate 100 form a second gap 204 in the axial direction of the air inlet. The oil stains condensed in the upper air inlet cavity 106 flow into the first gap 203 along the wind shield ring plate 201, avoiding directly flowing out of the air inlet through the flange 104 and dripping onto the stove, thereby improving the cleanliness and thus the user experience. The oil stains in the first gap 203 flow into the lower air inlet cavity 105 through the second gap 204, avoiding accumulation in the first gap 203 and being difficult to clean.

[0054] In this embodiment, the width of the first gap 203 in the radial direction of the air inlet is 0.5 mm, which ensures that the slow gas in the lower air inlet cavity 105 does not come into contact with the high-speed gas in the flange 104 in large quantities, while ensuring that oil droplets pass through.

[0055] In other alternative embodiments, the width of the first gap 203 in the radial direction of the air inlet can be set to 1 mm. Although the first gap 203 is slightly enlarged, the possibility of the high-speed gas in the flange 104 flowing out through the first gap 203 and contacting the slow gas in the lower air inlet cavity 105 is still low. The increase in the first gap 203 facilitates the passage of condensed oil droplets.

[0056] In other alternative embodiments, the width of the first gap 203 in the radial direction of the air inlet may be set to 0.75 mm to balance the sealing effect and the oil droplet circulation effect.

[0057] Of course, the actual specific value of the width of the first gap 203 in the radial direction of the air inlet is not limited to the above three examples, and any value between 0.5 mm and 1 mm is acceptable.

[0058] In this embodiment, the height of the flange 104 along the axial direction of the air inlet is 15 mm, and the height of the wind shielding ring plate 201 along the axial direction of the vent 202 is 20 mm, so as to ensure that the slow gas in the lower air inlet cavity 105 does not contact the high-speed gas in the flange 104.

[0059] In other alternative embodiments, the height of the flange 104 along the axial direction of the air inlet can be set to 10 mm, and the height of the wind shielding ring plate 201 along the axial direction of the vent 202 can be set to 10 mm, so as to save materials and reduce costs.

[0060] In other alternative embodiments, the height of the flange 104 along the axial direction of the air inlet can be set to 12.5 mm, and the height of the wind shielding ring plate 201 along the axial direction of the vent 202 can be set to 15 mm, so as to balance the cost and the blocking effect.

[0061] Of course, the sum of the height of the flange 104 along the axial direction of the air inlet and the height of the wind shield ring plate 201 along the axial direction of the vent 202 is greater than or equal to the distance between the air inlet and the vent 202 along the axial direction of the air inlet. The specific value is selected according to the size of the range hood and the internal space, and is not specifically limited here.

[0062] like Figure 2 As shown, in the width direction of the range hood, the air inlet plate 100 is tilted downward from front to back, and an oil dripping groove 107 is arranged at the rear end of the air inlet plate 100. The range hood also includes an oil receiving box 400, which is connected to the upper shell 300 and is correspondingly arranged below the oil dripping groove 107. The air inlet plate 100 is tilted downward from front to back, and an oil dripping groove 107 and an oil receiving box 400 are arranged at the end. The oil flowing out through the second gap 204 flows to the rear end of the air inlet plate 100 under the action of its own gravity, and enters the oil receiving box 400 through the oil dripping groove 107, which facilitates the collection and cleaning of oil and improves the user experience.

[0063] In this embodiment, the oil collecting box 400 is in an elongated shape. Because the oil collecting box 400 needs to be frequently disassembled and cleaned, the elongated oil collecting box 400 is convenient to align with the oil drip groove 107 during installation, and the installation is relatively simple. In addition, the elongated oil collecting box 400 has a larger volume, which reduces the number of times the oil collecting box 400 is disassembled and assembled, thereby improving the user experience.

[0064] like Figure 2 As shown, the air inlet plate 100 in this embodiment includes an air inlet panel 108, which is a flat plate. The air inlet panel 108 faces the stove and is provided with an air inlet. The flat air inlet panel 108 greatly reduces the cleaning dead angle of the range hood and reduces the cleaning difficulty. In addition, due to the existence of the support plate 200, the structural strength of the range hood meets the requirements.

[0065] In other alternative embodiments, reinforcing ribs are provided on the support plate 200. The reinforcing ribs may be provided to extend left and right along the length direction of the range hood to increase the structural strength of the range hood. The reinforcing ribs may also be provided at other angles as required, which are not particularly limited here. By adding reinforcing ribs to the support plate 200, the strength of the support plate 200 is increased, and the support for the range hood is increased, thereby improving the structural strength of the entire range hood.

[0066] like Figure 1 As shown, the air inlet in this embodiment includes a first air inlet 101, a left air inlet 102 and a right air inlet 103. The left air inlet 102 is arranged on the left side of the range hood, and the right air inlet 103 is arranged on the right side of the range hood. In addition to the commonly used first air inlet 101, the left air inlet 102 and the right air inlet 103 are arranged to prevent oil smoke from overflowing from the left and right sides of the range hood, thereby increasing the range and effect of oil smoke absorption.

[0067] like Figure 4 As shown, in this embodiment, the distance L1 between the left air inlet 102 and the left side of the range hood is 15 mm, and the distance L2 between the right air inlet 103 and the right side of the range hood is 15 mm. The dead angle formed by the high-speed airflow flowing in the range hood receiving chamber is reduced, and the dead angle is reduced, that is, the airflow vortex at the dead angle is reduced, thereby reducing the air resistance.

[0068] In other alternative embodiments, L1=20mm and L2=20mm can be set. At this time, the distance between the left air inlet 102 and the left side of the range hood and the distance between the right air inlet 103 and the right side of the range hood are slightly increased, but the reduction in structural strength of the air inlet plate 100 caused by the opening of the air inlets can be reduced.

[0069] In other alternative embodiments, L1 = 17.5 mm and L2 = 17.5 mm may be set to balance the structural strength of the air inlet plate 100 and the need to reduce dead angles.

[0070] Of course, in practice, the specific values ​​of L1 and L2 are not limited to the above three examples, and L1 and L2 can be equal or different, depending on the actual situation such as the size of the range hood.

[0071] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so the above terms cannot be understood as limiting the present invention. The "left", "right", "front" and "back" referred to in this embodiment correspond to Figure 4 Left, right, front and back.

[0072] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A range hood, comprising an upper shell and an air inlet plate, wherein the lower end of the upper shell is open, the air inlet plate is connected to the lower end of the upper shell and blocks the opening at the lower end of the upper shell, the upper shell and the air inlet plate form a receiving cavity, an air inlet is provided on the air inlet plate, and the receiving cavity is connected to the outside through the air inlet, characterized in that: The range hood further comprises a support plate, which is arranged in the accommodating cavity and divides the accommodating cavity into an upper air inlet cavity and a lower air inlet cavity, and a vent is provided on the support plate, which communicates with the upper air inlet cavity and the lower air inlet cavity; The air inlet plate comprises a flange, and the flange extends from the hole wall of the air inlet along the axial direction of the air inlet toward the vent and partially extends into the vent.

2. The range hood according to claim 1, characterized in that: The support plate includes a wind shield ring plate, which surrounds the vent, and the lower end of the wind shield ring plate extends toward the air inlet and is sleeved on the outer periphery of the flange.

3. The range hood according to claim 2, characterized in that: The wind deflector ring plate and the flange form a first gap in the radial direction of the wind deflector ring plate.

4. The range hood according to claim 3, characterized in that: A second gap is formed between the wind shielding ring plate and the inner wall surface of the air inlet plate in the axial direction of the air inlet.

5. The range hood according to claim 4, characterized in that: In the width direction of the range hood, the air inlet plate is arranged to be tilted downward from front to back, and an oil drip groove is arranged at the rear end of the air inlet plate. The range hood also includes an oil collecting box, which is connected to the upper shell and is arranged correspondingly below the oil drip groove.

6. The range hood according to claim 2, characterized in that: The upper end of the wind shielding ring plate extends toward the direction close to the impeller.

7. The range hood according to claim 2, characterized in that: The support plate is provided with reinforcing ribs.

8. The range hood according to claim 1, characterized in that: The air inlet plate is a flat plate.

9. The range hood according to claim 1, characterized in that: The air inlet comprises a left air inlet, and the left air inlet is arranged on the left side of the range hood; And / or, the air inlet includes a right air inlet, and the right air inlet is arranged on the right side of the range hood.

10. The range hood according to claim 9, characterized in that: When the air inlet includes the left air inlet, the left air inlet is 15-20 mm away from the left side of the range hood; And / or, when the air inlet includes the right air inlet, the right air inlet is 15-20 mm away from the right side of the range hood.

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