Range hood

Abstract

The utility model discloses a range hood which comprises a power device, the power device comprises a fan frame and a fan arranged in the fan frame, the bottom of the fan frame is open, a fan cover is arranged at the opening, and the fan is fixed in a cavity formed by the fan frame and the fan cover; a sound absorption device is arranged on the side, facing the interior of the fan frame, of the fan cover, the sound absorption device comprises a flow guide sound absorption box and a sound absorption material, the sound absorption material is arranged between the flow guide sound absorption box and the fan cover, the flow guide sound absorption box comprises a box body and an oil guide groove used for bearing oil dripping from the fan, and the oil guide groove is formed in the box body. Compared with the prior art, the noise reduction device has the advantages that through the arrangement of the sound absorption device, the sound absorption material in the sound absorption device can absorb noise transmitted downwards by the fan, the oil guide groove in the flow guide sound absorption box can receive oil dripping from the fan, and splashing of the oil due to dripping is avoided.

Description

Technical Field

[0001] The utility model relates to an oil fume purification device, in particular to an oil fume extractor. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Range hoods work based on the principle of fluid dynamics. They absorb and exhaust oil smoke through a fan system installed inside the range hood, and use a filter to filter out some grease particles. The fan system is usually a centrifugal fan, including a volute, an impeller installed in the volute, and a motor that drives the impeller to rotate. When the impeller rotates, negative pressure suction is generated at the center of the fan, sucking the oil smoke under the range hood into the fan. After being accelerated by the fan, it is collected by the volute and guided to be discharged outdoors.

[0003] The main source of noise in a range hood is the aerodynamic noise generated by the power system (fan system). When the distance between the noise source and the user is appropriately increased, the noise can be significantly reduced. Therefore, one current noise reduction method is to place the fan system of the range hood on the ceiling, so that the noise source is far away from the human ear, which has certain noise reduction advantages compared to traditional range hoods. For example, a range hood disclosed in Chinese patent application No. 201420736783.5 comprises: a smoke hood, wherein the smoke hood is provided with a first smoke inlet and a first smoke outlet; a smoke exhaust box, wherein a smoke extraction assembly is provided in the smoke exhaust box, and the smoke exhaust box is provided with a second smoke inlet and a second smoke outlet; a first pipe member for smoke intake connecting the first smoke outlet and the second smoke inlet, so that the range hood can be smoothly installed in the suspended ceiling, and the impeller and the motor in the smoke exhaust box are away from the user, so that the noise perceived by the user is reduced when the range hood is working; another example is a range hood disclosed in Chinese patent application No. 201820663244.1, comprising a smoke hood and a host channel arranged in sequence from bottom to top, and a centrifugal fan located at the top of the range hood, wherein one end of the host channel is connected to the smoke hood, and the other end is connected to the fan air inlet of the centrifugal fan, and the centrifugal fan is located above the suspended ceiling, which can reduce the adverse effects of the range hood noise on the human body.

[0004] In the above-mentioned existing range hoods, the air duct below the fan system adopts a straight-through cavity, which can keep the noise source away from the human ear, but prevent the noise from propagating downward through the air duct cavity. No noise reduction processing is performed on the noise, and the actual noise reduction effect is not ideal.

[0005] To this end, the applicant has made improvements. Please refer to the Chinese patent application number 202110475152.7, which discloses a range hood, including an air intake assembly, a power device for being arranged above the ceiling, and a connecting pipe that connects the air intake assembly and the power device fluid. A noise reduction assembly is arranged between the connecting pipe and the power device. By setting the noise reduction assembly with a smooth curved structure in the box body, the passing oil fume airflow can be guided, the airflow can be balanced to reduce vortices and aerodynamic noise, and at the same time, the noise propagated downward by the power device can be reflected, so that the noise propagated downward is reduced.

[0006] Due to the installation form of the above-mentioned existing ceiling range hood that the whole machine is attached to the wall (including the smoke pipe and the fan platform) and the horizontal arrangement of the fan, oil may drip downward and be blown by the oil smoke, causing oil splashing. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a range hood to effectively reduce noise and oil splashing in view of the deficiencies in the above-mentioned prior art.

[0008] The utility model solves the above technical problems by adopting the following technical solution: a range hood, comprising a power device, the power device comprising a fan frame and a fan arranged in the fan frame, the bottom of the fan frame is open and a fan cover is arranged at the open position, the fan is fixed in a cavity formed by the fan frame and the fan cover; the characteristics are:

[0009] A sound absorbing device is provided on one side of the fan cover facing the inside of the fan frame, the sound absorbing device includes a flow guide sound absorbing box and a sound absorbing material, the sound absorbing material is arranged between the flow guide sound absorbing box and the fan cover, the flow guide sound absorbing box includes a box body and an oil guide groove for receiving oil dripping from the fan, and the oil guide groove is formed on the box body.

[0010] By setting up a sound-absorbing device, the sound-absorbing material therein can absorb the noise transmitted downward by the fan, and the oil guide groove on the guide sound-absorbing box can receive the oil dripping from the fan to avoid splashing caused by dripping oil.

[0011] Preferably, the oil guide groove is formed by the upper surface of the box body being recessed downward.

[0012] Preferably, in order to facilitate guiding the oil backwards so as to be finally collected in the oil cup, the oil guide groove gradually slopes downwards from front to rear.

[0013] Furthermore, a suction port is formed on the rear side of the fan cover, and the rear end of the oil guide groove does not extend backward beyond the front edge of the suction port, thereby preventing oil from dripping from the suction port and instead flowing downward along the fan cover.

[0014] Furthermore, in order to facilitate the extraction of oil smoke, the range hood further comprises an air inlet assembly and a connecting pipe connected between the power device and the air inlet assembly, and the connecting pipe is communicated with the suction port.

[0015] Preferably, the fan cover includes a cover plate and a surrounding plate arranged around the outer periphery of the cover plate, the surrounding plate extends upward from the outer periphery of the cover plate, the rear end of the cover plate is spaced apart from the rear surrounding plate, and the suction port is formed between the rear end of the cover plate and the rear surrounding plate.

[0016] Preferably, in order to facilitate guiding the oil smoke to be sucked upward into the fan, the rear end of the cover plate is bent downward, and the fan cover also includes a guide plate, which extends upward and forward from the bottom of the rear enclosure, thereby forming a backward protruding shape, and the upper end of the guide plate extends to the air inlet of the fan.

[0017] Furthermore, a first oil leakage hole is provided at the connection between the guide plate and the rear enclosure, so that the oil on the guide plate can flow downward along the rear side of the fan cover.

[0018] Preferably, in order to facilitate the oil inside the fan to flow downward into the oil guide groove, the fan is arranged horizontally, and the fan includes a downward air inlet and an air inlet ring arranged at the air inlet, and a second oil leakage hole is opened on the air inlet ring, and the oil guide groove at least corresponds to the position of the second oil leakage hole.

[0019] Preferably, the fan also includes a volute, the air inlet is opened on the volute, the air inlet ring includes an annular mounting portion and a guide portion extending from the radial inner side of the mounting portion in a curved manner into the volute, the mounting portion is located on the outside of the volute and is fixed to the position of the volute around the air inlet, and the second oil leakage hole is opened on the guide portion.

[0020] Compared with the prior art, the utility model has the advantages that: by setting up a sound-absorbing device, the sound-absorbing material therein can absorb the noise transmitted downward by the fan, and the oil guide groove on the guide sound-absorbing box can receive the oil dripping from the fan to avoid splashing of the oil due to dripping. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a range hood according to an embodiment of the utility model;

[0022] Figure 2 A schematic diagram of a power device of a range hood according to an embodiment of the utility model;

[0023] Figure 3 for Figure 2 A cross-sectional view of a range hood;

[0024] Figure 4 for Figure 2Schematic diagram of a hidden fan cover of a range hood;

[0025] Figure 5 A schematic diagram of a flow guide and sound absorption box of a range hood according to an embodiment of the utility model;

[0026] Figure 6 It is a schematic diagram of a fan cover of a power device of a range hood according to an embodiment of the utility model. DETAILED DESCRIPTION

[0027] Embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions.

[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model 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. Since the embodiments disclosed in the present utility model can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0029] See also Figure 1 to Figure 6 A range hood comprises a power device 1, a connecting pipe 2 and an air intake assembly 3, wherein the power device 1 is arranged above the kitchen ceiling (the ceiling is not shown), the air intake assembly 3 is used to inhale oil smoke, and its specific air intake form is not limited. The connecting pipe 2 is connected between the power device 1 and the air intake assembly 3, and the connecting pipe 2 preferably adopts a hose.

[0030] The power device 1 includes a fan frame 11 and a fan 12 disposed in the fan frame 11. The fan 12 can be an existing conventional centrifugal fan, as described in the background technology, including a volute 121, an impeller 122 disposed in the volute 121, and a motor 123 for driving the impeller 122 to rotate. The fan 12 is arranged horizontally, that is, the axis of the fan 12 extends in the vertical direction, and an air inlet 124 is provided on the volute 121, the air inlet 124 faces downward, and an air inlet ring 125 is provided at the air inlet 124. The bottom of the fan frame 11 is open and a fan cover 13 is provided at the open position, so that the fan 12 is fixed in the cavity formed by the fan frame 11 and the fan cover 13.

[0031] The rear side of the fan cover 13 is formed with a suction port 131 connected to the connecting pipe 2. The fan cover 13 includes a cover plate 132 and a surrounding plate 133 arranged around the outer periphery of the cover plate 132, and the surrounding plate 133 extends upward from the outer periphery of the cover plate 132. In this embodiment, the cover plate 132 is roughly rectangular, the rear end of the cover plate 132 is arranged at intervals from the rear side surrounding plate 133, and the rear end of the cover plate 132 is bent downward, so that the above-mentioned suction port 131 is formed between the rear end of the cover plate 132 and the rear side surrounding plate 133. The bottom of the bent rear end of the cover plate 132 can be flush with the bottom of the rear side surrounding plate 133, and the connecting pipe 2 can be directly or indirectly connected to the bottom of the rear end of the cover plate 132 and the bottom of the rear side surrounding plate 133.

[0032] The fan cover 13 also includes a guide plate 134, which extends upward and forward from the bottom of the rear side enclosure 133 in a curved manner, and may be in a rearward protruding shape, preferably in an arc shape. The guide plate 134 corresponds to the suction port 131, and its upper end portion may extend to the air inlet 124 of the fan 12 to guide the oil smoke sucked from the suction port 131 into the fan 12. At the same time, the guide plate 134 may receive part of the oil dripping from the fan 12, and the oil smoke flows downward along the upper surface of the guide plate 134. A first oil leakage hole 135 may be opened at the connection between the guide plate 134 and the rear side enclosure 133, so that the oil smoke can pass through the first oil leakage hole 135 and flow downward from the rear side of the connecting pipe 2 until it is collected in the oil cup 5 set at the rear side of the bottom of the air inlet assembly 3.

[0033] A sound absorbing device 4 is provided on one side of the fan cover 13 facing the inside of the fan frame 11. The sound absorbing device 4 includes a flow-guiding sound-absorbing box 41 and a sound-absorbing material 42. The sound-absorbing material 42 is embedded between the flow-guiding sound-absorbing box 41 and the fan cover 13. The flow-guiding sound-absorbing box 41 includes a box body 411, a through groove 412 provided on the box body 411, and an oil guide groove 413 provided on the upper surface of the box body 411. The box body 411 is in a shape that is concave in a direction away from the fan cover 13, so that the sound absorbing material 42 is provided in the concave position. The through groove 412 runs through the upper and lower surfaces of the box body 411, so that the box body 411 is hollow, so that the sound absorbing material 42 absorbs the sound energy of the noise generated by the fan 12. Preferably, the through groove 412 can be arranged in a grid shape. The oil guide groove 413 is used to receive the oil dripping downward from the fan 12.

[0034] The sound-absorbing box 41 as a whole gradually extends downward from front to back, and the oil guide groove 413 can be in a long strip shape, and also gradually extends downward from front to back. The oil guide groove 413 is formed by the upper surface of the box body 411 being concave downward, and its rear end does not extend backward beyond the front side edge of the suction port 131 to prevent the oil dripping downward from the fan 12 from flowing to the suction port 131 and dripping downward.

[0035] In order to facilitate the oil guide groove 413 to receive the oil of the fan 12, a second oil leakage hole 126 is provided on the air inlet ring 125 of the fan 12. The second oil leakage hole 126 is provided on the circumferential inner side of the air inlet ring 125, so that the oil in the fan 12 flows out from the second oil leakage hole 126 and flows downward to the oil guide groove 413. The air inlet ring 125 includes an annular mounting portion 1251 and a guide portion 1252 extending from the radial inner side of the mounting portion 1251 to the inside of the volute 121 in a curved manner. The mounting portion 1251 is located on the outer side of the volute 121 and is fixed to the position of the volute 121 located around the air inlet 124. The second oil leakage hole 126 is provided on the guide portion 1252.

[0036] There may be two second oil leakage holes 126, which are symmetrically arranged in the left-right direction, and the oil guide grooves 413 have at least two corresponding ones. In this embodiment, there are four oil guide grooves 413 arranged at intervals in the left-right direction to receive the oil dripping from the surface of the volute 121 of the fan 12. The oil flowing down from the oil guide grooves 413 flows along the fan cover 13, the connecting pipe 2 and the air inlet assembly 3 until it is collected in the oil cup 5 provided at the rear side of the bottom of the air inlet assembly 3.

Claims

1. A range hood, comprising a power device (1), the power device (1) comprising a fan frame (11) and a fan (12) arranged in the fan frame (11), the bottom of the fan frame (11) is open and a fan cover (13) is arranged at the open position, the fan (12) is fixed in a cavity formed by the fan frame (11) and the fan cover (13); characterized in that: A sound absorbing device (4) is provided on one side of the fan cover (13) facing the inside of the fan frame (11); the sound absorbing device (4) comprises a flow-guiding sound-absorbing box (41) and a sound-absorbing material (42); the sound-absorbing material (42) is arranged between the flow-guiding sound-absorbing box (41) and the fan cover (13); the flow-guiding sound-absorbing box (41) comprises a box body (411) and an oil guide groove (413) for receiving oil dripping from the fan (12); the oil guide groove (413) is formed on the box body (411).

2. The range hood according to claim 1, characterized in that: The oil guide groove (413) is formed by the upper surface of the box body (411) being recessed downward.

3. The range hood according to claim 1, characterized in that: The oil guide groove (413) gradually slopes downward from front to back.

4. The range hood according to claim 3, characterized in that: A suction port (131) is formed on the rear side of the fan cover (13), and the rear end of the oil guide groove (413) does not extend backward beyond the front edge of the suction port (131).

5. The range hood according to claim 4, characterized in that: The range hood further comprises an air inlet assembly (3) and a connecting pipe (2) connected between the power device (1) and the air inlet assembly (3), wherein the connecting pipe (2) is in communication with the suction port (131).

6. The range hood according to claim 4, characterized in that: The fan cover (13) comprises a cover plate (132) and a surrounding plate (133) arranged around the outer periphery of the cover plate (132); the surrounding plate (133) extends upward from the outer periphery of the cover plate (132); the rear end of the cover plate (132) is spaced apart from the rear surrounding plate (133); and the suction port (131) is formed between the rear end of the cover plate (132) and the rear surrounding plate (133).

7. The range hood according to claim 6, characterized in that: The rear end of the cover plate (132) is in a downwardly bent shape. The fan cover (13) further comprises a guide plate (134). The guide plate (134) extends upward and forwardly from the bottom of the rear side enclosure (133) in a bent manner, thereby forming a shape protruding backward. The upper end of the guide plate (134) extends to the air inlet (124) of the fan (12).

8. The range hood according to claim 7, characterized in that: A first oil leakage hole (135) is provided at the connection between the guide plate (134) and the rear enclosure plate (133).

9. The range hood according to claim 1, characterized in that: The fan (12) is arranged horizontally, and comprises a downwardly facing air inlet (124) and an air inlet ring (125) arranged at the air inlet (124); a second oil leakage hole (126) is provided on the air inlet ring (125); and the oil guide groove (413) at least corresponds to the position of the second oil leakage hole (126).

10. The range hood according to claim 9, characterized in that: The fan (12) also includes a volute (121), the air inlet (124) is opened on the volute (121), the air inlet ring (125) includes an annular mounting portion (1251) and a guide portion (1252) extending from the radial inner side of the mounting portion (1251) in a curved manner toward the inside of the volute (121), the mounting portion (1251) is located on the outer side of the volute (121) and is fixed to the position of the volute (121) around the air inlet (124), and the second oil leakage hole (126) is opened on the guide portion (1252).

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