A type of range hood

Abstract

This invention discloses a range hood, including a first smoke collection hood, a second smoke collection hood, a fan frame, and a main fan disposed within the fan frame. The bottom of the fan frame is open, forming a first main air inlet and a second main air inlet arranged to the left and right. In the non-operating state of the range hood, the first smoke collection hood closes the first main air inlet, and the second smoke collection hood closes the second main air inlet. In the operating state of the range hood, the first smoke collection hood opens the first main air inlet, and the second smoke collection hood opens the second main air inlet. Swirls are formed at both the first and second main air inlets. Compared with the prior art, the advantages of this invention are: by forming swirls at the main air inlets, the range hood's main air inlets, under negative pressure, draw upwards to form jet streams, thus creating a "tornado" effect. Within the "tornado" cyclone coverage area, the fumes are less likely to diffuse and instead concentrate inwards, thereby significantly improving the fume extraction effect.

Description

Technical Field

[0001] This invention relates to an oil fume purification device, and more particularly to an oil fume extractor. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They are generally classified into top-mounted and side-mounted types, with top-mounted range hoods gaining wider use due to their neatness, compactness, and small space-saving design.

[0003] Top-mounted range hoods typically include a smoke collection hood, a fan frame mounted on the smoke collection hood, and a volute, impeller, and motor that drives the impeller installed inside the fan frame. An air inlet is located at the center of the smoke collection hood and is directly connected to the high negative pressure zone where the fan frame is located. This is as disclosed in Chinese patent applications 202121190529.6 or 201821996599.9.

[0004] These types of range hoods only allow smoke to enter from the inside of the hood. The airflow is faster and the negative pressure is stronger near the air inlet near the fan frame, while the negative pressure decreases significantly at the air inlet further away from the fan frame. Since the burners of the stove used for cooking are usually located on the left and right sides directly below the range hood, and the fumes diffuse as they rise, these range hoods have poor smoke extraction performance and often result in fumes escaping.

[0005] Furthermore, after prolonged use, a large amount of grease accumulates inside range hoods. This grease adheres to the impeller, increasing its load, clogging the blade gaps, and exacerbating noise. The grease inside the range hood also breeds bacteria and emits unpleasant odors that can spread into the kitchen and affect health. To address this, self-cleaning range hoods have been developed, typically using steam nozzles to clean grease. However, these models usually only allow for localized cleaning, and the nozzles, exposed to the grease, become clogged over time, gradually losing their self-cleaning function. This clogging also increases the burden on the water pump, potentially causing it to burn out. Additionally, the cleaning steam cannot be reused, consuming significant amounts of cleaning fluid and water. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a range hood that reduces the escape of oil fumes and improves the oil fume extraction effect.

[0007] The second technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a range hood that improves the cleaning effect of the main fan and the inner cavity of the range hood, and achieves steam circulation to save resources.

[0008] The technical solution adopted by the present invention to solve the first technical problem mentioned above is as follows: a range hood, comprising a first smoke collection hood, a second smoke collection hood, a fan frame, and a main fan disposed within the fan frame, wherein the bottom of the fan frame is open to form a first main air inlet and a second main air inlet arranged to the left and right; characterized in that:

[0009] When the range hood is not in operation, the first smoke collection hood closes the first main air inlet, and the second smoke collection hood closes the second main air inlet;

[0010] When the range hood is in operation, the first smoke collection hood opens the first main air inlet, and the second smoke collection hood opens the second main air inlet, with swirling airflows formed at the first and second main air inlets respectively.

[0011] By creating a vortex (i.e., induced vortex) at the main air inlet, the range hood draws upwards under negative pressure at each main air inlet, forming a jet stream. Furthermore, since a large amount of hot air is generated during cooking, this hot air flows upwards to each main air inlet, thus creating a "tornado" effect. The fumes are not easily dispersed within the area covered by the "tornado" vortex and instead gather inwards, thereby reducing the escape of fumes and significantly improving the fume extraction effect.

[0012] Furthermore, to facilitate the formation of swirling airflow, the range hood also includes a first pipe disposed on the front side of the two smoke collection hoods and a second pipe disposed on the rear side of the two smoke collection hoods, wherein the first pipe and the second pipe are hollow inside;

[0013] The first duct is equipped with a first swirling jet corresponding to the first main air inlet and a second swirling jet corresponding to the second main air inlet;

[0014] The second duct is equipped with a third swirling jet corresponding to the first main air inlet and a fourth swirling jet corresponding to the second main air inlet;

[0015] The first and third swirling jets work together to form a swirling flow at the first main air inlet, while the second and fourth swirling jets work together to form a swirling flow at the second main air inlet.

[0016] Furthermore, the first fume hood includes a first auxiliary air inlet, and the second fume hood includes a second auxiliary air inlet. When the range hood is in operation, the first auxiliary air inlet is in fluid communication with the first duct, and the second auxiliary air inlet is in fluid communication with the second duct. Thus, the fumes can be discharged into the duct through the auxiliary air inlets so as to form a vortex by spraying.

[0017] Furthermore, the first smoke hood includes a hollow first hood body and a first auxiliary fan disposed within the first hood body, and the second smoke hood includes a hollow second hood body and a second auxiliary fan disposed within the second hood body. Since the range hood has different speed settings, there are different upward jet streams, and since the oil fumes produced when cooking different dishes are different, the jet flow rate can be controlled by controlling the air volume of the first auxiliary fan and the second auxiliary fan, that is, the size of the induced vortex can be controlled, thereby achieving the best "tornado" effect.

[0018] Furthermore, the two smoke hoods open and close their main air inlets as follows: the first smoke hood and the second smoke hood are rotatably connected to the fan frame, the ends of the first smoke hood and the second smoke hood connected to the fan frame are rotating ends, and the ends of the first smoke hood and the second smoke hood opposite to the rotating ends are free ends. The first auxiliary air inlet is located at the free end of the first smoke hood, and the second auxiliary air inlet is located at the free end of the second smoke hood.

[0019] When the range hood is not in operation, the free ends of the first and second smoke collection hoods are close to each other, and the corresponding swirling jets of the first and second smoke collection hoods are closed; when the range hood is in operation, the free ends of the first and second smoke collection hoods are far apart.

[0020] Furthermore, the range hood also includes a cooling device comprising a first cooling section, a second cooling section, a third cooling section, and a fourth cooling section, all with cooling media circulating inside. The first cooling section is located inside a first smoke collection hood, the second cooling section is located inside a second pipe, the third cooling section is located inside a second smoke collection hood, and the fourth cooling section is located inside a first pipe. The first and second cooling sections are fluidly connected, as are the third and fourth cooling sections. By cooling the airflow within each pipe, the ejected swirling air becomes cold air. The cold airflow is ejected and sinks, while the hot airflow is ejected and drawn upwards. This process creates a pressure difference, making it easier to form vortices.

[0021] Furthermore, to facilitate the provision of cooling medium, the range hood also includes a water storage tank and a water pump. The water pump is in fluid communication with the second cooling section through the first transport section and with the fourth cooling section through the second transport section. The first transport section, the second cooling section, the first cooling section and the water pump form a circulation path. The second transport section, the fourth cooling section, the third cooling section and the water pump form a circulation path.

[0022] The technical solution adopted by the present invention to solve the second technical problem mentioned above is as follows: the range hood further includes a cleaner located between the first main air inlet and the second main air inlet. The cleaner is divided into a water storage tank and an atomizing chamber containing water mist atomized from the water in the water storage tank. When the range hood is not in operation, the atomizing chamber is fluidly connected to the first hood through the first auxiliary air inlet, and the atomizing chamber is also fluidly connected to the second hood through the second auxiliary air inlet. The first hood and the second hood are respectively fluidly connected to the fan frame, thereby enabling cleaning of the main fan and the inner cavity when the range hood is not in operation.

[0023] Furthermore, the portion of the cleaner that forms the atomizing chamber has a first partition and a second partition;

[0024] When the range hood is in operation, the first partition forms the left side wall of the atomizing chamber, and the second partition forms the right side wall of the atomizing chamber, thereby isolating the atomizing chamber from the fan frame.

[0025] When the range hood is not in operation, both the first and second partitions flip to the bottom of the main fan, thereby allowing the atomizing chamber to be fluidly connected to the smoke collection hoods on both sides. This isolates the atomizing chamber from the oily smoke environment when the range hood is working, and connects the atomizing chamber to the inner cavity of the range hood when it is not in operation.

[0026] Furthermore, to facilitate the installation of an atomizer inside the water storage tank, an atomizing nozzle is provided inside the atomizing chamber to spray the water mist generated by the atomizer into the atomizing chamber.

[0027] Furthermore, to facilitate the switching between the non-working and working states of the range hood, the first cover is provided with a first sealing part and a first ventilation part, and the second cover is provided with a second sealing part and a second ventilation part;

[0028] When the range hood is not in operation, the first ventilation section and the second ventilation section are respectively in fluid communication with the fan frame;

[0029] When the range hood is in operation, the first ventilation section is in fluid communication with the first duct, and the second ventilation section is in fluid communication with the second duct.

[0030] Furthermore, a first diversion plate is provided in the first pipe at a position corresponding to the first sealing part and the first ventilation part, and a second diversion plate is provided in the second pipe at a position corresponding to the second sealing part and the second ventilation part. The portion of the first pipe above the first diversion plate is in fluid communication with the fan frame, and the space above and below the first diversion plate in the first pipe is isolated. The portion of the second pipe above the second diversion plate is in fluid communication with the fan frame, and the space above and below the second diversion plate in the second pipe is isolated.

[0031] When the range hood is not in operation, the first ventilation section is above the first diversion plate and is in fluid communication with the fan frame, and the second ventilation section is above the second diversion plate and is in fluid communication with the fan frame.

[0032] When the range hood is in operation, the first ventilation section is located below the first diversion plate and is in fluid communication with the first duct, and the second ventilation section is located below the second diversion plate and is in fluid communication with the second duct.

[0033] Furthermore, to facilitate the rectification of water mist, the range hood also includes a first flow equalizer and a second flow equalizer installed in the fan frame. When the range hood is not in operation, the first hood is in fluid communication with the fan frame through the first flow equalizer, and the second hood is in fluid communication with the fan frame through the second flow equalizer.

[0034] Preferably, both the first flow equalizer and the second flow equalizer are hollow structures. The top of the first flow equalizer is provided with a first air outlet, and the top of the second flow equalizer is provided with a second air outlet. The first air outlet has at least two outlets and is arranged at intervals in the front-back direction, and the second air outlet has at least two outlets and is arranged at intervals in the front-back direction.

[0035] Furthermore, the range hood also includes a first heater and a second heater. When the range hood is not in operation, the first heater is located between the atomizing chamber and the first auxiliary air inlet, and the second heater is located between the atomizing chamber and the second auxiliary air inlet. This allows the water mist to be heated to form high-temperature steam, thereby improving the cleaning effect.

[0036] Furthermore, the range hood also includes a first heater located at the first main air inlet and a second heater located at the second main air inlet, thereby further heating the jet exhaust, increasing the pressure difference, and improving the tornado effect.

[0037] Furthermore, the first heater and the second heater can rotate relative to the fan frame. When the range hood is not in operation, the two heaters are located above the corresponding smoke collection hoods, thereby avoiding interference between the heaters and the smoke collection hoods.

[0038] Furthermore, the range hood also includes a cleaner located between the first main air inlet and the second main air inlet. The cleaner is fixed to the fan frame, and the two main air inlets are separated by the cleaner. The first heater is rotatably mounted to the cleaner via a first connecting rod, and the second heater is rotatably mounted to the cleaner via a second connecting rod. The cleaner provides a mounting base for the heaters.

[0039] Compared with the prior art, the advantages of this invention are as follows: By forming a vortex (i.e., induced vortex) at the main air inlet, the main air inlets of the range hood are drawn upward under the action of negative pressure, forming a jet stream. Furthermore, since a large amount of hot air is generated during cooking, this hot air flows upward to each main air inlet, thereby forming a "tornado" effect. The fumes are not easily diffused within the coverage area of ​​the "tornado" vortex, but instead gather inward, thereby reducing the escape of fumes and greatly improving the fume extraction effect. When the range hood is not in operation, a steam circulation path is formed to clean the main fan and the inner cavity of the range hood, and to realize the recycling of high-temperature steam. At the same time, the nozzles are isolated during cooking to prevent grease blockage. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the closed state of the range hood according to an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the range hood in the open state according to an embodiment of the present invention;

[0042] Figure 3 This is a cross-sectional view (left-right section) of the range hood in the open state according to an embodiment of the present invention;

[0043] Figure 4 This is a cross-sectional view (horizontal section) of the range hood in the open state according to an embodiment of the present invention;

[0044] Figure 5 This is an exploded view of the first smoke collection hood of the range hood according to an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the first and second smoke collection hoods of a range hood according to an embodiment of the present invention;

[0046] Figure 7 This is a cross-sectional view (section and cross-section) of the range hood in the open state according to an embodiment of the present invention. Figure 4 parallel);

[0047] Figure 8 for Figure 7 A magnified view of a portion of the image;

[0048] Figure 9 This is a partial schematic diagram of the cleaning device for a range hood according to an embodiment of the present invention;

[0049] Figure 10 This is a top-section (horizontal section) view of the range hood in the open state according to an embodiment of the present invention;

[0050] Figure 11 This is a cross-sectional view of the range hood of the present invention in an intermediate state as it changes from an open state to a closed state.

[0051] Figure 12 This is a cross-sectional view of the range hood in the closed state according to an embodiment of the present invention. Detailed Implementation

[0052] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration 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. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0054] See Figures 1-3 A range hood includes a first smoke collection hood 1, a second smoke collection hood 2, a fan frame 3, and a main fan 4. The bottom of the fan frame 3 is open, forming a first main air inlet 311 on the left and a second main air inlet 312 on the right. The fan frame 3 includes a left side wall 32 and a right side wall 33. The main fan 4 is disposed within the fan frame 3. The first smoke collection hood 1 and the second smoke collection hood 2 are rotatably connected to the bottom of the fan frame 3, with the first smoke collection hood 1 located to the left of the second smoke collection hood 2. Thus, the first smoke collection hood 1 can rotatably open and close the first main air inlet 311, and the second smoke collection hood 2 can rotatably open and close the second main air inlet 312. In this embodiment, the main fan 4 is a centrifugal fan with its axis extending in the left-right direction, having a first inlet 41 facing left and a second inlet 42 facing right. Therefore, within the fan frame 3, the portion located between the left side wall 32 of the fan frame 3 and the left side of the main fan 4 constitutes the first air duct 34, and the portion located between the right side wall 33 of the fan frame 3 and the right side of the main fan 4 constitutes the second air duct 35. In the open state, fumes enter the first air duct 34 through the first air inlet 11 and the second air inlet 12 into the second air duct 35, such as... Figure 3 As indicated by the middle arrows A and B.

[0055] The first smoke hood 1 and the second smoke hood 2 are symmetrically arranged. The first smoke hood 1 is rotatably connected to the bottom of the left side wall 32 of the fan frame 3, and the second smoke hood 2 is rotatably connected to the bottom of the right side wall 33 of the fan frame 3. One end of each smoke hood 1 and smoke hood 2 connected to the fan frame 3 is a rotating end, while the opposite end is a free end. The first smoke hood 1 and the second smoke hood 2 have at least a closed state and an open state. That is, when the first smoke hood 1 and the second smoke hood 2 are flipped inward (the free ends of the first smoke hood 1 and the second smoke hood 2 approach each other) to a horizontal state, the first main air inlet 311 and the second main air inlet 312 can be closed. At this time, the inside of the range hood is isolated from the outside, preventing insects, cockroaches, etc., from entering the range hood and causing damage. When the first smoke hood 1 and the second smoke hood 2 are flipped outward (the free ends of the first smoke hood 1 and the second smoke hood 2 are far apart from each other), preferably to a horizontal state, the first main air inlet 311 and the second main air inlet 312 can be opened. At the same time, since the first smoke hood 1 and the second smoke hood 2 extend beyond the fan frame 3 in the lateral direction, they can play a role in collecting smoke and reducing the escape of oil fumes.

[0056] The first smoke hood 1 and the second smoke hood 2 have the same structure and are arranged symmetrically. See also Figures 2-7 The first smoke hood 1 includes a hollow first hood body 11. The free end of the first smoke hood 1 is the free end of the first hood body 11, and the rotating end of the first smoke hood 1 is the rotating end of the first hood body 11. The free end of the first hood body 11 is open, thus forming a first auxiliary air inlet 12 at the free end. A first auxiliary fan 13 is provided inside the rotating end of the first hood body 11. An opening is provided on the front or rear side of the first hood body 11 corresponding to the first auxiliary fan 13. A first sealing part 14 and a first ventilation part 15 are provided at the opening.

[0057] The second smoke hood 2 includes a hollow second hood body 21. The free end of the second smoke hood 2 is the free end of the second hood body 21, and the rotating end of the second smoke hood 2 is the rotating end of the second hood body 21. The free end of the second hood body 21 is open, thus forming a second auxiliary air inlet 22 at its free end. A second auxiliary fan 23 is provided inside the rotating end of the second hood body 21. An opening is provided on the front or rear side of the second hood body 21 corresponding to the second auxiliary fan 23, and a second sealing part 24 and a second ventilation part 25 are provided at the opening.

[0058] In this embodiment, the first auxiliary fan 13 is located near the front of the first cover 11, while the second auxiliary fan 23 is located near the rear of the second cover 21. In the open state, each sealing part is located above the corresponding ventilation part, and in the closed state, each ventilation part is located above the corresponding sealing part. Preferably, each sealing part and ventilation part is semi-circular.

[0059] The range hood also includes a first duct 51 disposed on the front side of the two smoke collection hoods and a second duct 52 disposed on the rear side of the two smoke collection hoods. The first duct 51 and the second duct 52 are hollow and can be fixed to the bottom of the fan frame 3. The range hood also includes a first flow equalizer 61 disposed on the bottom left side of the fan frame 3 and a second flow equalizer 62 disposed on the bottom right side of the fan frame 3. The first flow equalizer 61 is located on the rotating end of the first smoke collection hood 1, and the second flow equalizer 62 is located on the rotating end of the second smoke collection hood 2.

[0060] The left and right ends of the first pipe 51 extend to the rotating ends of the first smoke hood 1 and the second smoke hood 2. The first pipe 51 has a top opening corresponding to the first flow equalizer 61, and a first diverter plate 511 is provided below this opening. The portion above the first diverter plate 511 is in fluid communication with the inside of the first flow equalizer 61, while the portion below the first diverter plate 511 corresponds to the first sealing part 14 or the first ventilation part 15. In the open state, the portion below the first diverter plate 511 corresponds to and is in fluid communication with the first ventilation part 15, thereby allowing fluid communication between the first pipe 51 and the inside of the first hood 11. As shown by arrow C in 7, gas inside the first hood 11 can enter the first pipe 51 through the first ventilation part 15. In the closed state, see... Figure 8 The first ventilation section 15 rotates to be in fluid communication with the first flow equalizer 61. Since the first sealing section 14 is located below the first diverter plate 511, the first enclosure 11 and the first pipe 51 are no longer in fluid communication. In this state, when the first auxiliary fan 13 starts, gas flows from inside the first enclosure 11 to the first flow equalizer 61. See [link to relevant documentation]. Figure 8 As indicated by the middle arrow D.

[0061] The left and right ends of the second pipe 52 extend to the rotating ends of the first smoke hood 1 and the second smoke hood 2. The second pipe 52 has a top opening corresponding to the second flow equalizer 62, and a second diverter plate 521 is provided below this opening. The portion above the second diverter plate 521 is in fluid communication with the inside of the second flow equalizer 62, while the portion below the second diverter plate 521 corresponds to the second sealing part 24 or the second ventilation part 25. In the open state, the portion below the second diverter plate 521 corresponds to and is in fluid communication with the second ventilation part 25, thus allowing fluid communication between the second pipe 52 and the inside of the second hood 21. In the closed state, the second ventilation part 15 rotates to be in fluid communication with the second flow equalizer 62. Since the second sealing part 24 is located below the second diverter plate 521, there is no longer fluid communication between the second hood 21 and the second pipe 52. In this state, when the second auxiliary fan 23 is started, gas flows from the second hood 21 to the second flow equalizer 62.

[0062] The space within the first pipe 51 is isolated above and below the first diverter plate 511, and the space within the second pipe 52 is isolated above and below the second diverter plate 521.

[0063] Both the first flow equalizer 61 and the second flow equalizer 62 are hollow structures. The top of the first flow equalizer 61 is provided with a first air outlet 611, and the top of the second flow equalizer 62 is provided with a second air outlet 621. There may be at least two first air outlets 611, which are arranged at intervals in the front-back direction, and there may be at least two second air outlets 621, which are arranged at intervals in the front-back direction.

[0064] The rear wall of the first duct 51 is provided with a first swirling jet 512 and a second swirling jet 513 arranged at intervals from left to right. The front wall of the second duct 52 is provided with a third swirling jet 522 and a fourth swirling jet 523 arranged at intervals from left to right. The first swirling jet 512 and the third swirling jet 522 are located on the right side of the rotating end of the first hood 11, corresponding to the first main air inlet 311. The second swirling jet 513 and the fourth swirling jet 523 are located on the left side of the rotating end of the second hood 21, corresponding to the second main air inlet 312. Each swirling jet is nozzle-shaped, and the first swirling jet 512 and the second swirling jet 513 are inclined from front to back and to the right, while the third swirling jet 522 and the fourth swirling jet 523 are inclined from back to front and to the left. The position of the corresponding swirling jet in each duct can be recessed into the duct. When the first smoke hood 1 and the second smoke hood 2 are closed, each swirling jet is closed.

[0065] Combination Figure 4 and Figure 7 When the system is open, the first auxiliary fan 13 starts, and air enters from the first auxiliary air inlet 12, then enters the interior of the first duct 51, and finally exits from the first swirl jet 512 and the second swirl jet 513.

[0066] A first baffle plate 514 is provided in the first pipe 51 at a position corresponding to the rotating end of the second smoke hood 2, and a second baffle plate 524 is provided in the second pipe 52 at a position corresponding to the rotating end of the first smoke hood 1. This prevents fluid communication between the first pipe 51 and the second smoke hood 2, and also prevents fluid communication between the second pipe 52 and the first smoke hood 1. It also ensures that the first pipe 51 and the second pipe 52 are in a high static pressure state, which makes it easier for each swirling jet to spray gas further.

[0067] The range hood also includes a cleaning device, comprising a cleaner 71 located between a first main air inlet 311 and a second main air inlet 312, separating the two main air inlets. The bottom of the cleaner 71 is lower than the bottom of the two smoke collection hoods. The cleaner 71 can be fixed to the fan frame 3. The cleaning device also includes a first heater 72 located to the left of the cleaner 71 and a second heater 73 located to the right of the cleaner 71. The first heater 72 is rotatably mounted to the cleaner 71 via a first connecting rod 721, and the second heater 73 is rotatably mounted to the cleaner 71 via a second connecting rod 731. The first connecting rod 721 and the second connecting rod 722 can rotate to a horizontal state and a vertically upward state, with each heater located at the end of the corresponding connecting rod away from the cleaner 71.

[0068] During cooking, both fume hoods are open, and both heaters are flipped to a horizontal position. See below. Figure 2 and Figure 3 At this time, the first heater 72 is located in the middle and slightly lower position in the left-right direction of the first main air inlet 311, and the second heater 73 is located in the middle and slightly lower position in the left-right direction of the second main air inlet 312. When not cooking, both fume hoods are closed, and both heaters are flipped to a vertically upward position. See [link / reference]. Figure 12 This is to prepare for clean heating.

[0069] The cleaner 71 is divided into upper and lower parts: a water tank 711 at the bottom and an atomizing chamber 712 at the top. When the two heaters are flipped to the vertically upward position, their positions correspond to the atomizing chamber 712. The cleaning device also includes a water pump 74 and a cooling device. The water pump 74 is in fluid communication with the water tank 711 through an inlet pipe 741 and an outlet pipe 742. Water can be pumped out of the water tank 711 through the inlet pipe 741 and returned to the water tank 711 through the outlet pipe 742. The bottom of the main fan 4 can abut against the top of the cleaner 71, thereby sealing the top of the atomizing chamber 712. Alternatively, a separate plate can be used to seal the top of the atomizing chamber 712. The cleaner 71, forming the atomizing chamber 712, has a first partition 713 and a second partition 714. The first partition 713 is rotatably connected to the bottom of the main fan 4, and the second partition 714 is also rotatably connected to the bottom of the main fan 4. The rotation axis of each partition extends in the front-to-back direction. When the range hood is in operation, the first partition 713 and the second partition 714 extend vertically. The first partition 713 forms the left side wall of the atomizing chamber 712, and the second partition 714 forms the right side wall. This isolates the atomizing chamber 712 from the oil fume environment within the fan frame 3, preventing damage to internal components. When the range hood is not in operation, both the first partition 713 and the second partition 714 are flipped to the bottom of the main fan 4, allowing the atomizing chamber 712 to communicate fluidly with the inside of the first hood 11 through the adjacent first auxiliary air inlet 12, and with the inside of the second hood 21 through the adjacent second auxiliary air inlet 22. A water tank 711 is equipped with an atomizer 715, and an atomizing nozzle 716 is provided in the atomizing chamber 712 to spray water mist from the water tank 711 into the atomizing chamber 712.

[0070] The cooling device is tubular in shape and includes a first cooling section 751, a second cooling section 752, a third cooling section 753, and a fourth cooling section 754. Heat-collecting fins (not shown) can be installed on each cooling section to enhance the cooling airflow effect. The first cooling section 751 is located inside the first housing 11, the second cooling section 752 is located inside the second pipe 52, the third cooling section 753 is located inside the second housing 21, and the fourth cooling section 754 is located inside the first pipe 51. The first cooling section 751 and the second cooling section 752 are in fluid communication, as are the third cooling section 753 and the fourth cooling section 754.

[0071] The water pump 74 is in fluid communication with the second cooling section 752 via the first transport section 743, and with the fourth cooling section 754 via the second transport section 744. The coolant circulating within the cooling sections is water from the storage tank 711, but other cooling media can also be used. The first transport section 743, the second cooling section 752, the first cooling section 751, and the water pump 74 form a circulation path; the second transport section 744, the fourth cooling section 754, the third cooling section 753, and the water pump 74 also form a circulation path. To facilitate the formation of a loop between the water pump 74 and the cooling device, each cooling section consists of two sections arranged vertically. The ends of the two first cooling sections 751 furthest from the second cooling section 752 are interconnected, and the ends of the two third cooling sections 753 furthest from the fourth cooling section 754 are interconnected. The first transport section 743 and the second transport section 744 also have two sections each. Thus, when the cleaning device is working, the water pumped by the water pump 74 from the water storage tank 711 can be pumped out through one of the first transport sections 743, passing through a corresponding second cooling section 752, two first cooling sections 751, another second cooling section 752 and another first transport section 743 before returning to the water pump 74 and thus back to the water storage tank 711; the other path can be pumped out through one of the second transport sections 744, passing through a corresponding fourth cooling section 754, two third cooling sections 753, another fourth cooling section 754 and another second transport section 744 before returning to the water pump 74 and thus back to the water storage tank 711.

[0072] The range hood of this invention can generate a tornado effect, improving the smoke extraction efficiency. During cooking, the first smoke collection hood 1 and the second smoke collection hood 2 are opened, the first heater 72 and the second heater 73 are also flipped to a horizontal position, the main fan 4 is started, and the first partition 713 and the second partition 714 are respectively in a vertical position, abutting between the bottom of the main fan 4 and the top of the water storage tank 711, sealing the atomizing chamber 712; see also Figure 3 Start water pump 74 to keep the first cooling section 751, second cooling section 752, third cooling section 753, and fourth cooling section 754 at a low temperature. At this time, start the first auxiliary fan 13 and the second auxiliary fan 23. (See below) Figure 10Gas enters the first enclosure 11 through the first auxiliary air inlet 12 and encounters the first cooling section 751 for cooling. It then enters the second enclosure 21 through the second auxiliary air inlet 22 and encounters the third cooling section 753 for further cooling. Subsequently, the gas enters the first pipe 51 from the first enclosure 11 and encounters the fourth cooling section 754 (see arrow D), and then enters the second pipe 52 from the second enclosure 21 and encounters the second cooling section 752 (see arrow E), achieving further cooling. At this time, the first pipe 51 and the second pipe 52 are under high static pressure. The first swirling jet ejector 512, the second swirling jet ejector 513, and the fourth swirling jet ejector 523 are activated. By installing or adjusting the angle of each swirling jet ejector, the ejected airflow rotates clockwise (or counterclockwise) within each main air inlet. The first swirling jet ejector 512 and the third swirling jet ejector 522 create a swirling flow within the first main air inlet 311, and the second swirling jet ejector 513 and the fourth swirling jet ejector 523 create a swirling flow within the second main air inlet 312, as shown by arrows D and E. This swirling flow is called the induced swirling flow, which is one of the essential conditions for the formation of a "tornado." If, at the center of the induced swirling flow, the airflow flows upward to form a jet stream, this is another essential condition for the formation of a "tornado." The range hood draws air upwards through its main air inlets under negative pressure (generated by the main fan 4), creating a jet stream. Furthermore, a large amount of hot air is generated during cooking, flowing upwards to the main air inlets. This hot air is further heated by a first heater 72 located at the first main air inlet and a second heater 73 located at the second main air inlet.

[0073] Because the airflow ejected by the first swirling jet 512, the second swirling jet 513, and the fourth swirling jet 523 is cold air, the cold air jet sinks while the hot air jet rises. This process creates a pressure difference, easily forming vortices, thus creating a "tornado" phenomenon. Within the area covered by the "tornado" cyclone, cooking fumes are not easily dispersed but instead concentrate inwards, significantly improving the fume extraction effect. The formation of the "tornado" effect requires a certain flow ratio. Since different range hood settings result in different upward jets, and different dishes produce different amounts of fumes, the jet flow rate can be controlled by adjusting the airflow of the first auxiliary fan 13 and the second auxiliary fan 23. This allows control over the size of the induced swirling flow, achieving the optimal "tornado" effect.

[0074] Furthermore, the range hood of the present invention can also achieve circulating steam cleaning, see [link to relevant documentation]. Figure 11The arrows indicate the direction of movement of each component. The first smoke hood 1 and the second smoke hood 2 rotate inward to a horizontal position; the first heater 72 and the second heater 73 rotate upward to a vertical position; and the first partition 713 and the second partition 714 flip upward until they reach a horizontal position. Figure 12 As shown, the first enclosure 11 is in fluid communication with both the atomizing chamber 712 and the first flow equalizer 61, while the second enclosure 21 is in fluid communication with both the atomizing chamber 712 and the second flow equalizer 62. Both heaters are fully immersed in the atomizing chamber 712. When the first auxiliary fan 13 starts, the gas in the first enclosure 11 first enters the first flow equalizer 61, forming a high static pressure state, and then flows evenly from the first air outlet 611 into the fan frame 3. At this time, the second auxiliary fan 23 rotates in the opposite direction, drawing the gas from the main fan 4 into the second enclosure 21 from the second air outlet 621 of the second flow equalizer 62, and then into the first enclosure 11 through the atomizing chamber 712 to achieve circulation. The gas flow path is shown by arrow F. At the same time, the atomizer 715 in the water tank 711 works, which can atomize the water in the water tank 711 into a vapor state. The atomizing nozzle 716 in the atomizing chamber 712 can spray the above vaporized water into the atomizing chamber 712. At this time, each heater starts heating to form high-temperature steam. Under the action of two auxiliary fans, steam circulation cleaning is achieved. After cleaning the inner cavity of the range hood, the high-temperature steam will return to the atomizing chamber 712 for reheating and replenishment of new steam before entering the next cycle.

[0075] The term "fluid connectivity" as used in this invention refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. This third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

Claims

1. A range hood, comprising a first smoke collection hood (1), a second smoke collection hood (2), a fan frame (3), and a main fan (4) disposed within the fan frame (3), wherein the bottom of the fan frame (3) is open to form a first main air inlet (311) and a second main air inlet (312) arranged to the left and right; characterized in that: When the range hood is not in operation, the first smoke hood (1) closes the first main air inlet (311), and the second smoke hood (2) closes the second main air inlet (312); When the range hood is in operation, the first smoke hood (1) opens the first main air inlet (311), and the second smoke hood (2) opens the second main air inlet (312). Swirls are formed at the first main air inlet (311) and the second main air inlet (312). The range hood also includes a first pipe (51) disposed on the front side of the two smoke collection hoods and a second pipe (52) disposed on the rear side of the two smoke collection hoods, wherein the first pipe (51) and the second pipe (52) are hollow inside; The first duct (51) is provided with a first swirling jet (512) corresponding to the first main air inlet (311) and a second swirling jet (513) corresponding to the second main air inlet (312); The second pipe (52) is provided with a third swirling jet (522) corresponding to the first main air inlet (311) and a fourth swirling jet (523) corresponding to the second main air inlet (312); The first swirling jet (512) and the third swirling jet (522) cooperate to form a swirling flow at the first main air inlet (311), and the second swirling jet (513) and the fourth swirling jet (523) cooperate to form a swirling flow at the second main air inlet (312).

2. The range hood according to claim 1, characterized in that: The first smoke hood (1) includes a first auxiliary air inlet (12), and the second smoke hood (2) includes a second auxiliary air inlet (22). When the range hood is in operation, the first auxiliary air inlet (12) and the first pipe (51) are in fluid communication, and the second auxiliary air inlet (22) and the second pipe (52) are in fluid communication.

3. The range hood according to claim 2, characterized in that: The first smoke hood (1) includes a hollow first hood body (11) and a first auxiliary fan (13) disposed inside the first hood body (11). The second smoke hood (2) includes a hollow second hood body (21) and a second auxiliary fan (23) disposed inside the second hood body (21).

4. The range hood according to claim 3, characterized in that: The first smoke hood (1) and the second smoke hood (2) are rotatably connected to the fan frame (3). The ends of the first smoke hood (1) and the second smoke hood (2) connected to the fan frame (3) are rotating ends. The ends of the first smoke hood (1) and the second smoke hood (2) opposite to the rotating ends are free ends. The first auxiliary air inlet (12) is located at the free end of the first smoke hood (1), and the second auxiliary air inlet (22) is located at the free end of the second smoke hood (2). When the range hood is not in operation, the free ends of the first smoke hood (1) and the second smoke hood (2) are close to each other, and the corresponding swirling jets of the first smoke hood (1) and the second smoke hood (2) are closed; when the range hood is in operation, the free ends of the first smoke hood (1) and the second smoke hood (2) are far apart from each other.

5. The range hood according to claim 2, characterized in that: The range hood also includes a cooling device, which includes a first cooling section (751), a second cooling section (752), a third cooling section (753), and a fourth cooling section (754) in which cooling medium flows. The first cooling section (751) is located inside the first smoke hood (1), the second cooling section (752) is located inside the second pipe (52), the third cooling section (753) is located inside the second smoke hood (2), and the fourth cooling section (754) is located inside the first pipe (51). The first cooling section (751) and the second cooling section (752) are in fluid communication, and the third cooling section (753) and the fourth cooling section (754) are in fluid communication.

6. The range hood according to claim 5, characterized in that: The range hood also includes a water tank (711) and a water pump (74). The water pump (74) is in fluid communication with the second cooling section (752) through the first transport section (743) and the fourth cooling section (754) through the second transport section (744). The first transport section (743), the second cooling section (752), the first cooling section (751) and the water pump (74) form a circulation path. The second transport section (744), the fourth cooling section (754), the third cooling section (753) and the water pump (74) form a circulation path.

7. The range hood according to claim 4, characterized in that: The range hood also includes a cleaner (71) located between the first main air inlet (311) and the second main air inlet (312). The cleaner (71) is divided into a water tank (711) and an atomizing chamber (712) containing water mist atomized from the water in the water tank (711). When the range hood is not in operation, the atomizing chamber (712) is in fluid communication with the first cover (11) through the first auxiliary air inlet (12). The atomizing chamber (712) is also in fluid communication with the second cover (21) through the second auxiliary air inlet (22). The first cover (11) and the second cover (21) are in fluid communication with the fan frame (3) respectively.

8. The range hood according to claim 7, characterized in that: The cleaner (71) that forms the atomizing chamber (712) has a first partition (713) and a second partition (714); When the range hood is in operation, the first partition (713) forms the left side wall of the atomizing chamber (712), and the second partition (714) forms the right side wall of the atomizing chamber (712), thereby isolating the atomizing chamber (712) from the fan frame (3) by the first partition (713) and the second partition (714). When the range hood is not in operation, the first partition (713) and the second partition (714) are both flipped to the bottom of the main fan (4), so that the atomizing chamber (712) is in fluid communication with the smoke collection hoods on both sides respectively.

9. The range hood according to claim 7, characterized in that: The water storage tank (711) is equipped with an atomizer (715), and the atomizing chamber (712) is equipped with an atomizing nozzle (716) that can spray the water mist generated by the atomizer (715) into the atomizing chamber (712).

10. The range hood according to claim 7, characterized in that: The first cover (11) is provided with a first sealing part (14) and a first ventilation part (15), and the second cover (21) is provided with a second sealing part (24) and a second ventilation part (25); When the range hood is not in operation, the first ventilation section (15) and the second ventilation section (25) are in fluid communication with the fan frame (3); When the range hood is in operation, the first ventilation section (15) is in fluid communication with the first pipe (51), and the second ventilation section (25) is in fluid communication with the second pipe (52).

11. The range hood according to claim 10, characterized in that: A first diversion plate (511) is provided in the first pipe (51) at a position corresponding to the first sealing part (14) and the first ventilation part (15). A second diversion plate (521) is provided in the second pipe (52) at a position corresponding to the second sealing part (24) and the second ventilation part (25). The portion of the first pipe (51) above the first diversion plate (511) is in fluid communication with the fan frame (3). The space above and below the first diversion plate (511) in the first pipe (51) is isolated. The portion of the second pipe (52) above the second diversion plate (521) is in fluid communication with the fan frame (3). The space above and below the second diversion plate (521) in the second pipe (52) is isolated. When the range hood is not in operation, the first ventilation section (15) is above the first diversion plate (511) and is in fluid communication with the fan frame (3), and the second ventilation section (25) is above the second diversion plate (521) and is in fluid communication with the fan frame (3). When the range hood is in operation, the first ventilation section (15) is located below the first diversion plate (511) and is in fluid communication with the first pipe (51), and the second ventilation section (25) is located below the second diversion plate (521) and is in fluid communication with the second pipe (52).

12. The range hood according to claim 7, characterized in that: The range hood also includes a first flow equalizer (61) and a second flow equalizer (62) disposed in the fan frame (3). When the range hood is not in operation, the first hood (11) is in fluid communication with the fan frame (3) through the first flow equalizer (61), and the second hood (21) is in fluid communication with the fan frame (3) through the second flow equalizer (62).

13. The range hood according to claim 12, characterized in that: The first flow equalizer (61) and the second flow equalizer (62) are both hollow structures. The top of the first flow equalizer (61) is provided with a first air outlet (611), and the top of the second flow equalizer (62) is provided with a second air outlet (621). There are at least two first air outlets (611) and they are arranged at intervals in the front-back direction. There are at least two second air outlets (621) and they are arranged at intervals in the front-back direction.

14. The range hood according to claim 7, characterized in that: The range hood also includes a first heater (72) and a second heater (73). When the range hood is not in operation, the first heater (72) is located between the atomizing chamber (712) and the first auxiliary air inlet (12), and the second heater (73) is located between the atomizing chamber (712) and the second auxiliary air inlet (22).

15. The range hood according to claim 1, characterized in that: The range hood also includes a first heater (72) located at the first main air inlet (311) and a second heater (73) located at the second main air inlet (312).

16. The range hood according to claim 15, characterized in that: The first heater (72) and the second heater (73) can rotate relative to the fan frame (3). When the range hood is not in operation, the two heaters are located above the corresponding smoke collection hoods.

17. The range hood according to claim 16, characterized in that: The range hood also includes a cleaner (71) located between the first main air inlet (311) and the second main air inlet (312). The cleaner (71) is fixed to the fan frame (3). The two main air inlets are separated by the cleaner (71). The first heater (72) is rotatably mounted to the cleaner (71) via a first connecting rod (721). The second heater (73) is rotatably mounted to the cleaner (71) via a second connecting rod (731).

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