Large-air-volume low-noise range hood

Abstract

The invention provides a large-air-volume low-noise range hood, which comprises a box body, a fan and an air duct cylinder, a silencing plate is laid on the inner wall surface of the box body, the fan is arranged at the top of the box body, the fan comprises a coaxial reverse motor, the coaxial reverse motor is connected with two stages of fan blades, the rotating directions and tangential angles of the two stages of fan blades are opposite, and the two stages of fan blades are arranged in the box body. And the air duct barrel is arranged outside the fan in a sleeving manner. The large-air-volume low-noise range hood has the advantages of being low in noise, large and uniform in air pressure and high in smoke exhaust efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and particularly relates to a range hood with a large air volume and low noise. Background Art

[0002] A range hood is a kitchen appliance for purifying the kitchen environment. It is installed above the kitchen stove and can quickly extract the waste generated by the stove combustion and the harmful oil fumes produced during the cooking process outdoors, reducing pollution, purifying the air, and having the safety guarantee functions of preventing poison and explosion. However, during the use in the kitchen, when the range hood works to extract the oil fumes, it will generate a lot of noise during the extraction process, which will cause discomfort to people. If used for a long time, it will also pose a health hazard to the human body. Currently, most range hoods do not have a good noise prevention function, and the fans mostly adopt a single-stage steering structure, with uneven air pressure and low smoke exhaust efficiency. Summary of the Invention

[0003] In order to make up for the deficiencies in the prior art, the present invention provides a range hood with a large air volume and low noise, which has the advantages of low noise, large and uniform air pressure, and high smoke exhaust efficiency.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A range hood with a large air volume and low noise, comprising a box body, a fan, and an air duct cylinder. A sound insulation board is laid on the inner wall surface of the box body. The fan is arranged on the top of the box body. The fan includes a coaxial reverse motor, and the coaxial reverse motor is connected with two-stage fan blades. The rotation directions and tangential angles of the two-stage fan blades are opposite. The air duct cylinder is sleeved outside the fan.

[0006] Further, the box body includes a front box and a rear box that are buckled front and back.

[0007] Further, the front box is composed of a front box panel, a front box back panel, and two front box side panels. The front box back panel and the front box side panels are embedded with sound insulation boards.

[0008] Further, the rear box is composed of a rear box frame board, a rear box grid board, an L-shaped rear box back panel, and a rear box top board. Sound insulation boards are provided on the side wall and the top wall of the rear box back panel. An air inlet is provided on the top wall of the rear box back panel, and a sound insulation board is provided below the air inlet.

[0009] Further, a plurality of damping sound insulation holes are provided on the rear box grid board and the rear box top board.

[0010] Further, a smoke collector is connected above the air inlet. The smoke collector is provided with a smoke collection port, and the inner wall of the smoke collection port is provided with a plurality of sound absorption holes. The top of the smoke collector is provided with an oil collection tank and an oil guide groove. The oil guide groove is communicated with the oil collection tank, and an oil discharge hole is arranged in the oil guide groove. The fan is connected with the smoke collector, and the oil guide groove receives the oil stains dripped by the fan.

[0011] Further, the coaxial reverse motor includes a reverse motor and a forward motor connected in series. The reverse motor is provided with a hollow shaft, and the forward motor is provided with a solid shaft. The hollow shaft is sleeved outside the solid shaft, and the hollow shaft and the solid shaft are respectively connected with a first-stage fan blade.

[0012] Further, the fan further includes a fan housing. An electric motor fixing cavity is arranged inside the fan housing, a wire threading groove is arranged on the outer wall of the fan housing, and a wire threading hole is arranged in the electric motor fixing cavity.

[0013] Further, the fan housing includes a base, a cylindrical barrel and a conical barrel connected from bottom to top.

[0014] Further, a sound absorption tile is arranged on the inner wall of the air duct cylinder body in a fitting manner, a smoke exhaust port is arranged at the top of the air duct cylinder body, and a check valve is arranged in the smoke exhaust port.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] For the large-air-volume and low-noise range hood of the present invention, a sound absorption board is arranged on the inner wall surface of the box body, which can absorb the noise during the operation of the equipment to the greatest extent; the fan adopts a coaxial reverse motor and is connected with two-stage fan blades, which can effectively improve the air pressure and keep the air pressure uniform, and improve the smoke exhaust efficiency. Description of the Drawings

[0017] Figure 1 is a structural diagram of a large-air-volume and low-noise range hood of the present invention.

[0018] Figure 2 is a schematic diagram of the opening and closing process of a large-air-volume and low-noise range hood of the present invention.

[0019] Figure 3 is an exploded view of a large-air-volume and low-noise range hood of the present invention.

[0020] Figure 4 is an exploded view of the front box of the present invention.

[0021] Figure 5 is an exploded view of the rear box of the present invention.

[0022] Figure 6 is a three-dimensional sectional view of the smoke collector of the present invention.

[0023] Figure 7It is the explosion diagram of the fan of the present invention.

[0024] Figure 8 It is the sectional view of the fan housing of the present invention.

[0025] Figure 9 It is the structure diagram of the coaxial reverse motor of the present invention.

[0026] Figure 10 It is the explosion diagram of the air duct cylinder of the present invention.

[0027] Wherein: 1. Front box; 11. Front box panel; 12. Front box back panel; 13. Front box side panel; 2. Rear box; 21. Rear box frame board; 22. Rear box grid board; 23. Rear box back panel; 24. Rear box top board; 25. Electric controller fixing plate; 26. Controller; 27. Smoke collector; 271. Sound absorption hole; 272. Oil collecting tank; 273. Oil guiding groove; 274. Oil drain hole; 275. Oil guiding pipe; 3. Fan; 31. Fan housing; 311. Base; 312. Cylindrical barrel; 313. Conical barrel; 314. Motor fixing cavity; 315. Wire threading groove; 316. Wire threading hole; 32. Coaxial reverse motor; 321. Reverse rotation motor; 322. Forward rotation motor; 323. Hollow shaft; 324. Solid shaft; 33. Fan blade; 4. Air duct cylinder; 41. Sound absorption tile; 42. Check valve; 5. Oil receiving box; 6. Sound absorption board. Specific embodiments

[0028] Many specific details are set forth in the following description in order to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from this description, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0029] Embodiment 1

[0030] Reference Figure 1-4 , a large-air-volume and low-noise range hood, comprising a box body composed of a front box 1 and a rear box 2, a fan 3, and an air duct cylinder 4. The front box 1 and the rear box 2 are buckled front and back, which is convenient for maintenance and repair. An oil receiving box 5 is connected to the bottom of the front box 1. The front box 1 is composed of an L-shaped front box panel 11, an L-shaped front box back panel 12, and two L-shaped front box side panels 13. The front box back panel 12 and the front box side panels 13 are embedded with a sound absorption board 6. The front box panel 11 is provided with a smoke hole, a lighting window, and a controller window. The front box back panel 12 is provided with a filter screen fixing hole, a lighting fixing hole, and a controller fixing hole.

[0031] Reference Figure 5, the rear box 2 is composed of a rear box frame plate 21, a rear box grille plate 22, an L-shaped rear box back plate 23 and a rear box top plate 24. Sound-absorbing plates 6 are provided on the side wall and the top wall of the rear box back plate 23, and an air inlet is provided on the top wall of the rear box back plate 23, and a sound-absorbing plate 6 is provided below the air inlet. A plurality of damping and sound-absorbing holes are provided on the rear box grille plate 22 and the rear box top plate 24, which can reduce wind noise. An electronic controller fixing plate 25 is also provided in the rear box 2, and a plurality of damping and sound-absorbing holes are provided on the electronic controller fixing plate 25. A controller 26 is installed on the rear box top plate 24.

[0032] Reference Figure 6 , a smoke collector 27 is connected above the air inlet, and the smoke collector 27 is provided with a smoke collecting port. A plurality of sound-absorbing holes 271 are provided on the cavity wall of the smoke collecting port. An annular oil collecting groove 272 and an oil guiding groove 273 are provided on the top of the smoke collector 27. The oil guiding groove 273 is communicated with the oil collecting groove 272, and an oil discharge hole 274 is provided in the oil guiding groove 273. The oil discharge hole 274 is connected to an oil receiving box 5 through an oil guiding pipe 275 to realize the collection of oil stains. The fan 3 is arranged on the top of the box body and is connected to the smoke collector 27. The oil guiding groove 273 receives the oil stains dripped by the fan 3.

[0033] Based on the above structure, sound-absorbing plates 6 are provided on the front side, rear side, left side, right side and upper side of the box body, which can perform sound absorption in five directions. Coupled with the design of the sound-absorbing holes, the noise during the operation of the range hood is greatly reduced.

[0034] Reference Figure 7-9 , the fan 3 includes a fan housing 31 and a coaxial reverse motor 32. The fan housing 31 includes a base 311, a cylindrical barrel 312 and a conical barrel 313 connected from bottom to top. A motor fixing cavity 314 is provided in the fan housing 31, and the coaxial reverse motor 32 is fixedly connected in the motor fixing cavity 314. A wire threading groove 315 is provided on the outer wall of the fan housing 31, and a wire threading hole 316 is provided in the motor fixing cavity 314.

[0035] The coaxial reverse motor 32 includes a reverse motor 321 and a forward motor 322 connected in series. The reverse motor 321 is provided with a hollow shaft 323, and the forward motor 322 is provided with a solid shaft 324. The hollow shaft 323 is sleeved outside the solid shaft 324, and each of the hollow shaft 323 and the solid shaft 324 is connected to a stage of fan blades 33. The rotation directions and tangential angles of the two stages of fan blades are opposite. Based on the above structure, the fan can achieve the technical effects of multi-stage steering, low noise, large and uniform air pressure.

[0036] Reference Figure 10 , the air duct cylinder body 4 is sleeved outside the fan 3. A sound-absorbing tile 41 is provided inside the air duct cylinder body 4 and fits the inner wall thereof. A smoke exhaust port is provided at the top of the air duct cylinder body 4, and a check valve 42 is provided in the smoke exhaust port.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A large-air-volume and low-noise range hood, characterized in that: It includes a box body, a fan and a duct cylinder. A sound-absorbing board is laid on the inner wall surface of the box body. The fan is arranged on the top of the box body. The fan includes a coaxial reverse motor which is connected with two-stage fan blades. The rotation directions and tangential angles of the two-stage fan blades are opposite. The duct cylinder is sleeved outside the fan.

2. The large air volume and low noise range hood according to claim 1, wherein: The box body includes a front box and a rear box which are buckled front and back.

3. The large air volume and low noise range hood according to claim 2, wherein: The front box is composed of a front box panel, a front box back panel and two front box side panels. The front box back panel and the front box side panels are embedded with sound-absorbing boards.

4. The large-air-volume and low-noise range hood according to claim 3, wherein: The rear box is composed of a rear box frame board, a rear box grid board, an L-shaped rear box back panel and a rear box top board. Sound-absorbing boards are provided on the side wall and the top wall of the rear box back panel. An air inlet is provided on the top wall of the rear box back panel, and a sound-absorbing board is provided below the air inlet.

5. The large air volume and low noise range hood according to claim 4, wherein: A plurality of damping sound-absorbing holes are provided on the rear box grid board and the rear box top board.

6. The large air volume and low noise range hood according to claim 5, wherein: A smoke collector is connected above the air inlet. The smoke collector is provided with a smoke collection port. A plurality of sound-absorbing holes are provided on the inner wall of the smoke collection port cavity. An oil collection tank and an oil guide groove are provided on the top of the smoke collector. The oil guide groove is communicated with the oil collection tank. An oil drain hole is provided in the oil guide groove. The fan is connected with the smoke collector. The oil guide groove receives the oil stains dripped by the fan.

7. The large-air-volume and low-noise range hood according to any one of claims 1-6, characterized in that: The coaxial reverse motor includes a reverse motor and a forward motor connected in series. The reverse motor is provided with a hollow shaft, and the forward motor is provided with a solid shaft. The hollow shaft is sleeved outside the solid shaft. The hollow shaft and the solid shaft are respectively connected with one-stage fan blades.

8. The large-air-volume and low-noise range hood according to claim 7, wherein: The fan further includes a fan housing. A motor fixing cavity is provided in the fan housing. A wire threading groove is provided on the outer wall of the fan housing, and a wire threading hole is provided in the motor fixing cavity.

9. The large air volume and low noise range hood according to claim 8, wherein: The fan housing includes a base, a cylindrical barrel and a conical barrel connected from bottom to top.

10. The large-air-volume and low-noise range hood according to claim 9, wherein: A sound-absorbing tile is provided inside the duct cylinder and fits the inner wall thereof. A smoke exhaust port is provided on the top of the duct cylinder, and a check valve is provided in the smoke exhaust port.

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