CN116951502A - A range hood - Google Patents

Abstract

The invention discloses a range hood, which comprises a fume collecting hood, a fan frame and a fan arranged in the fan frame, wherein the fan is a double air inlet fan, the axis of the fan extends in the left-right direction, and a first air inlet and a second air inlet which are arranged left and right are formed in the fume collecting hood; the range hood further comprises a first smoke guide plate and a second smoke guide plate; the first smoke guide plate and the second smoke guide plate can be at least in the following two states: the first smoke guide plate closes the first air inlet, and the second smoke guide plate closes the second air inlet; and in an open state, at least one of the first smoke guide plate and the second smoke guide plate turns towards the inside of the smoke collection cover to open the corresponding air inlet, so that a space positioned on the left side of the first smoke guide plate in the smoke collection cover and on the left side of the fan in the fan frame forms a first air channel, and/or a space positioned on the right side of the second smoke guide plate in the smoke collection cover and on the right side of the fan in the fan frame forms a second air channel, and the first air channel and the second air channel are mutually isolated.

Description

A range hood

Technical field

The invention relates to a range hood purification device, in particular to a range hood.

Background technique

Range hoods have become one of the indispensable kitchen appliances in modern families. The range hood works based on the principle of fluid dynamics. It absorbs and exhausts oil fumes through a centrifugal fan installed inside the range hood, and uses a filter to filter some oil particles. A centrifugal fan includes 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 in 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 out of the room.

Common household stoves usually have two burners on the left and right. There is a method on the market that has two air inlets at the bottom of the range hood to correspond to the two burners of the stove, which can improve the smoking effect of the two burners when cooking at the same time. . However, in home cooking, sometimes only one side of the burner is used, and sometimes both sides are used at the same time. Stir-frying cooking that can produce a lot of oil smoke is often only done on one side, and stir-fry cooking produces even greater oil smoke, so It is more likely for oil smoke to escape on the stir-frying side. A common solution is to increase the speed of the impeller to increase the total air volume of the range hood. The increase in the total air volume will increase the air volume of the air inlets on both sides of the range hood at the same time. Thereby improving the effect of smoking smoke. Obviously, the increase in impeller speed will lead to a significant increase in noise, which will affect people's health. In addition, the actual cooking and stir-frying occurs on one side, and the air volume on both sides is increased at the same time, resulting in a waste of energy consumption on the other side.

In addition, after long-term use of the range hood, a large amount of oil will accumulate inside the range hood, especially in the air duct, causing the growth of bacteria and microorganisms, or the generation of odor, which will adversely affect the kitchen environment and even the user's health. For example, the Chinese patent application number 201410704669.9 discloses a range hood with a purification and disinfection function. The range hood is equipped with an ultraviolet lamp and a rinse device for washing the ultraviolet lamp in the wind cabinet. However, this patent has the following problems: ① Since the ultraviolet lamp has been in the oil fume environment for a long time, oil stains are easy to accumulate on the surface of the lamp tube, resulting in a reduction in its disinfection function. Although there is a rinse device, the oil smoke has strong adhesion, and the cleaning effect of the rinse device is not good. It is good, and the elution device is complicated to maintain and is easily blocked by oil. ② The light source of the lamp tube is in a unique position, and the sterilization and disinfection effect is reduced where the light is blocked.

In order to solve the above problems, the applicant has disclosed some range hoods. For example, the Chinese patent application number 201710297953.2 discloses a range hood with a sterilization and deodorization function. A sterilization and deodorization function is provided inside the casing of the range hood. The flavor component includes an ultraviolet lamp and a flap. The flap is rotatably installed in the casing. The flap has at least two states. The first state can block the ultraviolet lamp from being polluted by oil smoke. The second state allows the ultraviolet lamp to be protected from oil smoke pollution. Exposed in the casing; another example is a range hood with sterilization and deodorization function disclosed in the Chinese patent application number 201710297954.7. Its flap can rotate relative to the axis of the ultraviolet lamp to block the upper and front sides of the ultraviolet lamp. below to avoid oil contamination of the UV lamp.

However, the problems with the above solution are: ① The ultraviolet lamp is always in the same air duct and cannot sterilize the back cover and bottom of the volute. The oil at the back and bottom of the volute is more concentrated, and it is also the hardest hit area for bacterial growth. . ②During the sterilization process, ultraviolet light is easily blocked by the shielding cover and creates a shadow surface, making it impossible to irradiate and sterilize. For example, when the flap in patent 201710297953.2 is in the open state, the gap between the flap and the fan frame cannot be sterilized by irradiation due to the blocking of the flap. The flap in patent 201710297954.7 is located directly above and below the front and can easily block ultraviolet light, causing Partial shadow.

In addition, ozone can penetrate into bacteria or viruses and turn them into enzymes. Its bactericidal power is 3,000 times that of chlorine, and its disinfection power is 30 times that of cresol solution. Most foul odors are positively charged. When ozone is combined with After combining, it will react to form other substances to achieve the effect of removing odor. Because ozone has the above functions of disinfection and odor removal, it is widely used in various places that require cleanliness and hygiene, such as public toilets. Some high-end range hoods add a negative ion generator (or ozone generator) inside the hood, with the purpose of using the negative ions and ozone generated by the negative ion generator to purify the kitchen air environment, as disclosed in Chinese patents such as application numbers 202210724167.7 and 202220542485.7 of. According to the principle of negative ion purification of the environment and the density of ozone, negative ions settle after neutralizing the positively charged airborne dust without charge. The specific gravity of ozone is heavier than that of air, and it also sinks. Although a negative ion generator is installed inside the range hood, the negative ions and ozone generated by the negative ion generator sink and will not automatically disperse to other places in the air. Therefore, negative ions and ozone can only purify the air around the carbon brush electrode of the negative ion generator. Since there is no effective flow, they cannot effectively purify the internal environment of the range hood. And to produce good disinfection effect, a certain concentration of ozone is required, but ozone is unstable and easy to decompose, which further makes the ozone concentration around the ozone generator higher, while the concentration far away from the generator is lower, which cannot play a very important role. It has the purpose of sterilization and deodorization.

In addition, the oil guide groove is a common and important component in range hood products. It has the function of collecting oil dirt and guiding the oil dirt to a specific path. For example, the oil guide groove located at the bottom of the volute is disclosed in the Chinese patent application number 202221406031.3. Because the oil is very viscous, especially in colder seasons, the oil can easily condense in the oil guide groove and prevent it from flowing, which will cause blockage of the oil circuit and eventually cause damage to the range hood.

Contents of the invention

The first technical problem to be solved by the present invention is to provide a range hood in view of the deficiencies in the above-mentioned prior art. When frying and cooking on one side, the corresponding side of the range hood can greatly increase the range hood. Effectively, reduce the escape of oil smoke.

The second technical problem to be solved by the present invention is to provide a range hood that can form a shielding structure through a smoke guide plate to isolate the sterilization device from the oil smoke environment during the cooking process.

The third technical problem to be solved by the present invention is to provide a range hood capable of sterilizing and disinfecting both air ducts in view of the above-mentioned deficiencies in the prior art.

The fourth technical problem to be solved by the present invention is to provide a range hood to prevent oil dirt from clogging the fan volute in view of the shortcomings of the above-mentioned prior art.

The fifth technical problem to be solved by the present invention is to provide a range hood to improve ozone generation efficiency in view of the deficiencies of the above-mentioned existing technologies.

The sixth technical problem to be solved by the present invention is to provide a range hood to expand the sterilization range in view of the shortcomings of the above-mentioned existing technologies.

The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a range hood, which includes a smoke collecting hood, a fan frame arranged on the smoke collecting hood, and a fan arranged in the fan frame. The fan is a double air inlet fan and the axis extends in the left and right directions. The smoke collecting hood is provided with a first air inlet and a second air inlet arranged left and right;

The range hood also includes a first smoke guide plate and a second smoke guide plate; it is characterized by:

The first smoke guide plate and the second smoke guide plate can be in at least the following two states:

In the closed state, the first smoke guide plate closes the first air inlet, and the second smoke guide plate closes the second air inlet;

In the open state, at least one of the first smoke guide plate and the second smoke guide plate is flipped toward the inside of the smoke collecting hood to open the corresponding air inlet, so that the left side of the first smoke guide plate and the fan frame are located in the smoke collecting hood. The space on the left side of the inner fan constitutes the first air duct, and/or the space on the right side of the second smoke guide plate in the smoke collecting hood and the space on the right side of the fan in the fan frame constitutes the second air duct, and the first air duct and The second air ducts are isolated from each other.

Through the cooperation of the first smoke guide plate, the second smoke guide plate and the fan, an isolated air duct is formed, which can change the load of the motor and the impeller speed by adjusting the positions of the two smoke guide plates without changing the energy consumption. Then the air volume at the air inlet of the range hood is changed to solve the problem of stir-frying and cooking on one side. The corresponding side of the range hood can greatly improve the effect of absorbing oil smoke and reduce the escape of oil smoke.

Further, the bottom surface of the smoke collecting hood is V-shaped. The bottom surface of the smoke collecting hood includes a first side plate on the left and a second side plate on the right. The first side plate is arranged from left to right. Gradually tilt downward, the second side panel gradually tilts downward from right to left, the intersection of the two side panels is the lowest position of the bottom surface of the smoke collecting hood, and the first air inlet is opened on the first side panel. The second air inlet is opened on the second side panel, whereby each side panel can guide the rising oil smoke to facilitate entry into the corresponding air inlet.

Further, the right edge of the first air inlet is higher than the right end of the first side plate, and the left edge of the second air inlet is higher than the left end of the second side plate; the smoke collecting hood further includes The bottom plate is arranged above the intersection of the first side plate and the second side plate, and the left and right sides of the bottom plate are lower than the lower edge of the corresponding air inlet, between the bottom of the bottom plate and the two side plates of the smoke collecting hood The space between them is constituted as an oil collecting tank, which can easily collect the oil dirt flowing down from the fume collecting hood and the fan frame.

Further, in the closed state, the ends of the two smoke guide plates that are close to each other are their respective first ends, and the ends of the two smoke guide plates that are far away from each other are their respective second ends, and the first ends are affected by The smoke collecting hood is constrained, and the second end is the free end;

A rotating shaft is provided for rotation in the smoke collecting hood, the first end of the first smoke guide plate is fixed to the corresponding rotating shaft through a first connecting rod, and the first end of the second smoke guide plate is connected through a second connecting rod. The rod is fixed to the corresponding rotating shaft, and the rotation axis of the rotating shaft extends in the front and rear direction, thereby avoiding the assembly gap caused by the direct connection between the smoke guide plate and the smoke collecting hood through the rotating shaft, and ensuring the sealing in the closed state.

In order to avoid a gap between the smoke guide plate and the side plate of the smoke collecting hood, a first side plate is connected between the lower edge of the first air inlet and the first end of the first smoke guide plate. A second flexible member is connected between the position of the second side plate at the lower edge of the second air inlet and the first end of the second smoke guide plate.

Further, the range hood further includes a movement mechanism for driving the first smoke guide plate and the second smoke guide plate, so that the first smoke guide plate and the second smoke guide plate can move synchronously or independently, by This can automatically control each smoke guide plate.

Further, in order to facilitate synchronous or independent movement, the movement mechanism includes a first driving mechanism, a second driving mechanism and a transmission mechanism, and the transmission mechanism includes a first gear, a second gear, a third gear and a rack, The first gear is arranged on the left side of the rack and the second gear is arranged on the right side of the rack. The first gear and the second gear are respectively fixed to one of the rotating shafts. The third gear can be opposite to the smoke collecting hood. turn; turn

The first driving mechanism is used to drive the rack to move up and down, and the second driving mechanism is used to drive the first gear or the second gear to move forward and backward. When the first gear and the second gear are meshed with the rack respectively, the The first driving mechanism drives the rack up and down to drive the first gear and the second gear to rotate at the same time, thereby driving the two smoke guide plates to move synchronously; when the second driving mechanism drives the first gear or the second gear to move away from the gear When the first gear meshes with the third gear, the two smoke guide plates move independently.

Further, in the closed state and the open state, the first smoke guide plate and the second smoke guide plate can be locked with the smoke collecting hood. Since the range hood will vibrate during operation, locking each smoke guide plate can effectively reduce the vibration of the smoke guide plates and reduce the occurrence of abnormal noise.

Further, each smoke guide plate is provided with a locking device on one side facing the inside of the smoke collecting hood, and the locking device is provided with an outer locking tongue close to the front and/or rear side of the smoke collecting hood, and the smoke collecting hood is correspondingly A first lockhole and a second lockhole are provided at the position. The first lockhole is used to lock with the outer lock tongue when each smoke guide plate is closed. The second lockhole is used to lock the outer lock tongue when each smoke guide plate is open. The lower and outer lock tongues are locked, thereby locking the smoke guide plate.

The technical solution adopted by the present invention to solve the above second technical problem is: a disinfection device is provided between the inner bottom of the smoke collecting hood and the bottom of the fan, and the first smoke guide plate or the second smoke guide plate is closed when opened. on the corresponding side of the disinfection unit.

The technical solution adopted by the present invention to solve the above-mentioned third technical problem is: the sterilization device includes a housing and rotating arms arranged on the front and rear sides of the housing. One end of the rotating arm is rotationally connected to the housing and the other end is Free end, the free end of the rotating arm can be locked or unlocked with each smoke guide plate, and the housing can be locked or unlocked with the smoke collecting hood. The smoke guide plate drives the disinfection device to flip into the left/right air duct, which can realize dual Air duct sterilization and disinfection.

Further, an ultraviolet lamp is provided in the housing, the rotating arm and the ultraviolet lamp are located at opposite ends of the housing, and the end of the housing corresponding to the ultraviolet lamp is hollowed out. When the disinfection device and the smoke guide plate are locked, by driving the rotating arm to rotate, the ultraviolet lamp can be flipped, and irradiate different positions during the flipping process, thereby achieving sterilization and disinfection of both air ducts and reducing light blockage. The problem.

In order to facilitate the locking of the disinfection device and the smoke guide plate, each smoke guide plate is provided with a locking device on the side facing the smoke collecting hood, and the locking device is provided with an inner locking device close to the front and/or rear side of the smoke collecting hood. Locking tongue, the inner locking tongue can be locked and unlocked with the rotating arm.

In order to facilitate the locking of the disinfection device and the smoke collecting hood, the smoke collecting hood is provided with a lock, and the lock can be locked or unlocked with the housing.

In order to facilitate the unlocking of the smoke collecting hood and the casing, the end of the rotating arm that is rotationally connected to the casing has a convex portion. When the free end of the rotating arm is downward, the lock buckle is locked with the casing; when the rotating arm When rotated to a horizontal state, the protruding portion of the rotating arm is inserted between the lock and the housing, so that the lock leaves the housing and is unlocked.

The technical solution adopted by the present invention to solve the above-mentioned fourth technical problem is: the fan includes a volute and an oil guide provided at the bottom of the volute; the disinfection device includes a casing, and the casing is disposed close to the oil guide There is a heater.

Further, the sterilization device includes a housing, and an ultraviolet lamp is provided inside the housing, so that ultraviolet sterilization can be achieved.

The technical solution adopted by the present invention to solve the above-mentioned fifth technical problem is: the bottom of the disinfection device is provided with an oxygen generating device capable of producing oxygen and passing it into the housing to cooperate with the ultraviolet lamp.

The technical solution adopted by the present invention to solve the above-mentioned sixth technical problem is: the sterilization device includes a housing, a heater and/or an ultraviolet lamp is provided in the housing, and a device capable of converting the heater to Heated hot air or ozone produced by UV lamps is blown out of the housing by a fan.

Further, ventilation holes are respectively provided on the left and right side walls of the housing. The fan, the ventilation hole on one side, the fan and the ventilation hole on the other side form a path for the circulation of hot gas or ozone, thereby realizing ozone Or internal circulation of hot air can achieve sterilization effect without dead spots inside the fan volute.

Further, in order to improve the heating efficiency of the oil guide member, the end of the housing corresponding to the heater is hollowed out, and an upper jet plate is provided in the housing for reflecting the hot gas heated by the heater to the oil guide member.

Furthermore, in order to improve the efficiency of ultraviolet sterilization, the end of the housing corresponding to the ultraviolet lamp is hollowed out, and a lower reflective plate is provided inside the housing for reflecting ultraviolet light generated by the ultraviolet lamp toward the outside of the housing.

Further, in order to facilitate the collection of oil dirt from the fan, the fan includes a volute and an oil guide member disposed at the bottom of the volute. The oil guide member has a top surface that is concave downward, thereby forming an oil guide groove in the oil guide member. .

Further, in order to facilitate the downward collection of oil contamination from the fan, an oil collection groove is formed at the bottom of the smoke collecting hood, and the oil guide groove can be connected with the oil collection groove;

The smoke collecting hood also includes a front plate, a front lining plate, a rear lining plate and a rear plate arranged in sequence from front to back. The space between the front plate and the front lining plate constitutes a first interlayer. The space between the lining plate and the rear plate constitutes a second interlayer. The first and second smoke guide plates are located between the front lining plate and the rear lining plate. The oil guide groove and the oil collecting groove are in the two interlayers. The same mezzanine is connected.

Compared with the prior art, the advantage of the present invention is that an isolated air duct is formed through the cooperation of the first smoke guide plate, the second smoke guide plate and the fan, and the two smoke guide plates can be passed through the two smoke guide plates without changing the energy consumption. The position is adjusted to change the load of the motor and the speed of the impeller, thereby changing the air volume at the air inlet of the range hood to solve the problem of one-sided stir-frying and cooking. The corresponding side of the range hood can greatly improve the effect of the range hood. , reduce the escape of oil smoke; through the cooperation of two smoke guide plates, a closed space is formed, which can protect the disinfection device from being affected by oil pollution when the range hood is working; by locking the disinfection device with the smoke guide plate, it can rotate with the smoke guide plate By rotating, the sterilization and disinfection of double air ducts can be realized, and the disinfection device can also rotate relative to the smoke guide plate, so that the ultraviolet lamp can be flipped, and irradiate different positions during the flipping process, so that both air ducts can be sterilized and disinfected, reducing The problem of light being blocked; heat and ozone can be circulated inside the range hood, thereby achieving sterilization and disinfection of the interior of the volute without dead corners; by setting up an oxygen generator, the efficiency of ultraviolet ozone generation can be increased.

Description of the drawings

Figure 1 is a schematic diagram of the closed state of the range hood according to the embodiment of the present invention;

Figure 2 is a cross-sectional view of the range hood in a closed state (left-right vertical cross-section) according to the embodiment of the present invention;

Figure 3 is a cross-sectional view of the range hood in a closed state (vertical cross-section in the front-to-back direction) according to the embodiment of the present invention;

Figure 4 is a schematic diagram of two smoke guide plates and their movement mechanism of the range hood according to the embodiment of the present invention;

Figure 5 is a cross-sectional view of the range hood according to the embodiment of the present invention, in which the motion mechanism drives two smoke guide plates to rotate synchronously;

Figure 6 is a cross-sectional view of the range hood according to the embodiment of the present invention, in which the motion mechanism drives two smoke guide plates to rotate independently;

Figure 7 is a schematic diagram of the motion mechanism of the range hood driving two smoke guide plates to rotate independently according to the embodiment of the present invention;

Figure 8 is a schematic diagram of the open state of the range hood according to the embodiment of the present invention;

Figure 9 is a cross-sectional view of the range hood in an open state according to the embodiment of the present invention;

Figure 10 is a schematic diagram of the air intake in the open state of the range hood according to the embodiment of the present invention;

Figure 11 is a schematic diagram of two smoke guide plates, their movement mechanism, and disinfection device of the range hood according to the embodiment of the present invention;

Figure 12 is a cross-sectional view (horizontal cross-section) of the range hood according to the embodiment of the present invention in an intermediate state between an open state and a closed state;

Figure 13 is a schematic diagram of the disinfection device and the rear lining of the range hood according to the embodiment of the present invention;

Figure 14 is an enlarged schematic diagram of part I of Figure 13;

Figure 15 is a schematic diagram of the locked state of the inner lock tongue and the rotating arm of the disinfection device in Figure 14;

Figure 16 is a schematic diagram of the locked state of the inner lock tongue and the rear liner of the disinfection device in Figure 14;

Figure 17 is a schematic diagram of the lock and rotating arm of the range hood according to the embodiment of the present invention;

Figure 18 is a schematic diagram of the locked state of the lock and the rotating arm of the range hood according to the embodiment of the present invention;

Figure 19 is a schematic diagram of the unlocked state of the lock and the rotating arm of the range hood according to the embodiment of the present invention;

Figure 20 is a partial cross-sectional view of the disinfection device of the range hood according to the embodiment of the present invention;

Figure 21 is a cross-sectional view of the disinfection device of the range hood according to the embodiment of the present invention (the cross-section in the installed state is a left-right vertical plane);

Figure 22 is a schematic diagram of the locking state of the disinfection device of the range hood and the first smoke guide plate according to the embodiment of the present invention;

Figure 23 is a schematic diagram of the independent sterilization state of the disinfection device of the range hood according to the embodiment of the present invention;

Figure 24 is a schematic diagram of the independent sterilization state of the disinfection device of the range hood according to the embodiment of the present invention.

Detailed ways

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the drawings, in which the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis", The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply the referred devices or components. Must have a specific orientation, be constructed and operated in a specific orientation. Since the disclosed embodiments of the present invention can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limiting, such as "up", "up", "Down" is not necessarily limited to a direction opposite or consistent with the direction of gravity. In addition, features defined as “first” and “second” may explicitly or implicitly include one or more of these features.

Referring to Figures 1 to 3 and 8 to 10, a range hood is a top-suction range hood, which includes a smoke collecting hood 1, a fan frame 2 arranged above the smoke collecting hood 1, and a fan frame 2 arranged above the smoke collecting hood 1. Fan 3 in rack 2. Preferably, the fan 3 is a centrifugal fan and a double-inlet fan, with its axis extending in the left-right direction, so that the two air inlets of the fan 3 face the left and right sides respectively. The fan 3 can be arranged at a middle position in the fan frame 2 .

The bottom surface of the smoke collecting hood 1 is V-shaped and includes a first side plate 13 on the left and a second side plate 14 on the right. The first side plate 13 gradually slopes downward from left to right, and the second side plate 14 It gradually slopes downward from right to left, and the intersection of the two side plates is the lowest position of the bottom surface of the smoke collecting hood 1. The first side panel 13 is provided with a first air inlet 11 , and the second side panel 14 is provided with a second air inlet 12 . The left edge (upper edge) of the first air inlet 11 may be lower than the left end (upper end) of the first side plate 13 , and the right edge (lower edge) of the first air inlet 11 may be higher than the first side plate 13 The right end (lower end) of the second air inlet 12 can be lower than the right end (upper end) of the second side plate 14, and the left edge (lower edge) of the second air inlet 12 can be lower than the right end (upper end) of the second side plate 14. It may be higher than the left end (lower end) of the second side plate 14 . In the closed state, the ends of the two smoke guide plates that are close to each other are the respective first ends, and the ends of the two smoke guide plates that are far away from each other are the respective second ends. The first ends of the two smoke guide plates are constrained by the smoke collecting hood 1, while the second ends are free ends. When rotated in place, the second ends can be locked through additional structures. The above-mentioned restraint and locking structures will be in More below.

The range hood also includes a first smoke guide plate 41 for opening and closing the first air inlet 11 and a second smoke guide plate 42 for opening and closing the second air inlet 12 . The first smoke guide plate 41 includes a first smoke guide plate body 411 and a first enclosure 412 , and the second smoke guide plate 42 includes a second smoke guide plate body 421 and a second enclosure 422 . The shape and size of the first smoke guide body 411 are adapted to the first air inlet 11 . The first enclosure 412 is disposed close to the upper end of the first smoke guide body 411 and is formed by the first smoke guide body 411 The surface facing the inside of the smoke collecting hood 1 extends into the smoke collecting hood 1 . Preferably, the first enclosure 412 is perpendicular to the first smoke guide plate body 411 . The shape and size of the second smoke guide body 421 are adapted to the second air inlet 12 . The second enclosure 422 is disposed close to the upper end of the second smoke guide body 421 and is formed by the second smoke guide body 421 The surface facing the inside of the smoke collecting hood 1 extends into the smoke collecting hood 1 . Preferably, the second enclosure 422 is perpendicular to the second smoke guide plate body 421 . When the first smoke guide plate 41 and the second smoke guide plate 42 are closed, they are turned over toward the inside of the fan frame 2. The front and rear sides of the first smoke guide plate body 411 and the second smoke guide plate body 421 correspond to the smoke collecting hood 1 respectively. The front and rear sides are in close contact, and the second end of each smoke guide plate in the closed state can contact the bottom of the fan 3, thereby jointly separating the air duct in the fan frame 2 with the fan 3, which can save the space under the range hood, thereby increasing the cooking time. operating space. The smoke collecting hood 1 is open at the top corresponding to the first side plate 13 and the second side plate 14, thereby communicating with the inside of the fan frame 2. When the two smoke guide plates are closed, the smoke collecting hood 1 is located in the first smoke guide. The space on the left side of the plate 41 and the left side of the fan 3 forms the first air duct S1, and the space on the right side of the second smoke guide plate 42 and the right side of the fan 3 in the smoke collecting hood 1 forms the second air duct S2. The two air ducts are isolated from each other. It is also possible to open only one smoke guide plate, and at this time only the corresponding air duct on one side is opened.

After the first smoke guide plate 41 and the second smoke guide plate 42 are closed, the two smoke guide plates and the front and rear sides of the smoke collecting hood 1 cooperate to form a closed space between the two smoke guide plates. Alternatively, first enclosures 412 can also be provided on the front and rear sides of the first smoke guide body 411, and second enclosures 422 can also be provided on the front and rear sides of the second smoke guide body 421, so that the two smoke guides can The panels are closed together to create a closed space between them. Alternatively, the first smoke guide plate 41 and the second smoke guide plate 42 can also cooperate with the bottom plate 17, the oil guide 34, etc. described below to form a closed space.

The first smoke guide plate 41 and the second smoke guide plate 42 can be in at least two states, the first state is a closed state, and the second state is an open state. In the closed state, as shown in Figures 1 and 2, the first smoke guide plate 41 and the second smoke guide plate 42 are in a state of maximum expansion angle. The first smoke guide plate 41 closes the first air inlet 11, and the first smoke guide plate 41 closes the first air inlet 11. The plate body 411 can be flush with the bottom of the first air inlet 11 and closed, while the first enclosure 412 extends into the smoke collecting hood 1, the second smoke guide plate 42 closes the second air inlet 12, and the second smoke guide plate body 421 It can be flush with the bottom of the second air inlet 12 and closed, and the second enclosure 422 extends into the smoke collecting hood 1 . This closed state can prevent odors from spreading into the kitchen. In the open state, as shown in Figures 8 and 9, the first smoke guide plate 41 and the second smoke guide plate 42 rotate toward each other until they are closed. Referring to the oil smoke flow path shown by the arrow in Figure 10, the oil smoke flows from the first inlet The air inlet 11 enters the first air duct S1 on the left, and enters the second air duct S2 on the right from the second air inlet 12.

A first flexible member 441 is connected between the first side plate 13 located at the lower edge of the first air inlet 11 and the first end of the first smoke guide plate 41 , and the second side plate 14 is located at the lower edge of the second air inlet 12 A second flexible member 442 is connected between the position and the first end of the second smoke guide plate 42 . Each flexible piece plays an isolation role, and its role will be described in detail below.

4 to 7 , the first ends of the first smoke guide plate 41 and the second smoke guide plate 42 are directly rotatably connected to the smoke collecting hood 1 through the rotating shaft 45 . The first smoke guide plate 41 is fixed to the corresponding rotating shaft 45 through the first connecting rod 461, and the second smoke guiding plate 42 is fixed to the corresponding rotating shaft 45 through the second connecting rod 462. The range hood also includes a motion mechanism for driving the first smoke guide plate 41 and the second smoke guide plate 42 to rotate. The motion mechanism includes a first drive mechanism 63 and a transmission mechanism. The first drive mechanism 63 is a linear drive module, and any existing linear drive module can be used. The transmission mechanism includes a first gear 651, a second gear 652, There are three gears 653 and racks 654. The first driving mechanism 63 is used to drive the rack 654 up and down. There are teeth on the left and right sides of the rack 654. The first gear 651 is arranged on the left side of the rack 654 and the second gear 652 is arranged on the left side of the rack 654. On the right side of the rack 654, the first gear 651 is fixed to the rotating shaft 45 corresponding to the first smoke guide plate 41, the second gear 652 is fixed to the rotating shaft 45 corresponding to the second smoke guide plate 42, and each rotating shaft passes through the corresponding gear. Centered and fixed. The third gear 653 can rotate relative to the smoke collecting hood 1, and the rotation axis is parallel to the rotation axes of the first gear 651 and the second gear 652.

The first gear 651 and the second gear 652 can mesh with the rack 654 at the same time. Therefore, when the first driving mechanism 63 drives the rack 654 to rise and fall, the first gear 651 and the second gear 652 can rotate synchronously to drive the first smoke guide. The plate 41 and the second smoke guide plate 42 rotate synchronously to realize expansion and closing, see Figure 4 (the third gear 653 is hidden in Figure 4) and Figure 5. The third gear 653 and the rack 654 are arranged front and back.

The motion mechanism also includes a second drive mechanism 66, which is also a linear drive module. There may be two second drive mechanisms 66, in which the output end of one second drive mechanism 66 is connected to the first gear 651, and the other second drive mechanism 66 The output end is connected to the second gear 652, which can drive the two gears to move forward and backward independently. Referring to Figures 6 and 7, if the second gear 652 is moved to no longer mesh with the rack 654, but meshes with the third gear 653, the third gear 653 is driven at this time (the driving mechanism of the third gear 653 is not shown , the driving mechanism is a rotational driving module (such as a motor) that can cause the second gear 652 to rotate, thereby driving the second smoke guide plate 42 to rotate, while the first smoke guide plate 41 is not affected (can be stationary or rotated). The independent rotation of the first smoke guide plate 41 is similar to this.

3, the smoke collecting hood 1 also includes a front plate 161, a front lining plate 162, a rear lining plate 163 and a rear plate 164 arranged in sequence from front to back. The space between the front plate 161 and the front lining plate 162 is constituted by The space between the first interlayer 181, the rear liner 163 and the rear panel 164 constitutes the second interlayer 182. The above-mentioned three gears and racks 654 are arranged in the second interlayer 182 between the rear plate 164 and the rear lining plate 163. The third gear 653 is connected to the rear plate 164, and the rack 654 is connected to the rear lining plate 163. The second interlayer 182 with better sealing performance isolates the gear structure from the oil fume environment. The above-mentioned first smoke guide plate 41 and the second smoke guide plate 42 are located between the front lining plate 162 and the rear lining plate 163 when they are closed.

The smoke collecting hood 1 also includes a bottom plate 17 , which is disposed above the intersection of the first side plate 13 and the second side plate 14 , and the left and right sides of the bottom plate 17 are lower than the lower edge of the corresponding air inlet. The space below the bottom plate 17 and between the two side plates of the fume collecting hood 1 constitutes an oil collecting tank 15, which can collect the oil dirt flowing down from the fan frame 2, the fan 3 and the fume collecting hood 1. The above-mentioned rotating shaft 45 is located above the bottom plate 17 .

The fan 3 can be disposed at an intermediate position in the left and right direction of the fan frame 2 and includes a volute 31, an impeller 32 disposed in the volute 31, and a motor 33 for driving the impeller 32 to rotate. The impeller 32 is a double-suction impeller with its axis extending in the left-right direction. An oil guide 34 is provided at the bottom of the volute 31 . The oil guide 34 has a top surface that is concave downward, thereby forming an oil guide groove 341 in the oil guide 34 . Usually, there is an oil leakage hole (not shown) at the lowest position of the bottom of the volute 31. The position of the oil guide groove 341 corresponds to the oil leakage hole. The oil dirt in the volute 31 is collected into the oil guide groove 341 through the oil leakage hole. The oil guide member 34 is formed with a first notch 342 at a portion corresponding to the first interlayer 181 to connect the oil guide groove 341 with the first interlayer 181 . The base plate 17 is formed with a second notch 171 at a portion corresponding to the first interlayer 181 to connect the oil guide groove 341 to the first interlayer 181 . The oil groove 15 is connected with the first interlayer 181 , whereby the oil dirt in the oil guide groove 341 can be collected downward into the oil collecting groove 15 through the first interlayer 181 . Since the motion mechanism of the present invention occupies a rear second interlayer 182, the oil guide groove 341 and the oil collection groove 15 are connected through the first interlayer 181. Alternatively, the motion mechanism can also occupy the first interlayer 181, and the oil guide groove 341 and The oil collection tank 15 is connected through the second interlayer 182 .

The disinfection device 5 is provided between the above-mentioned bottom plate 17 and the bottom of the oil guide 34. When the first smoke guide plate 41 and the second smoke guide plate 42 are closed, the first enclosure 412 abuts on the left side of the bottom of the oil guide 34. side, the second enclosure 422 is in contact with the right side of the bottom of the oil guide 34, and the two smoke guide plates, the flexible parts, the two lining plates of the smoke collecting hood 1, the bottom plate 17 and the oil guide 34 cooperate to form a closed A space in which the disinfection device 5 is enclosed. Therefore, in the operating state (open state) of the range hood, the first smoke guide plate 41 and the second smoke guide plate 42 can prevent oil dirt from clogging the nozzles that inject steam or water. In the closed state, the inside of the fan frame 2 can be sterilized with the air inlet closed, and ultraviolet rays can also be prevented from causing harm to the user. The flexible parts make the rotational joints between each smoke guide plate and the corresponding side plate rigidly connected, and the sealing effect is better.

Referring to Figures 11 to 19, each smoke guide plate is provided with a locking device 7 on one side facing the inside of the smoke collecting hood 1. The locking device 7 includes a long body 71 extending along the front and rear directions. At least one end of the end has a bending portion 72 that is bent away from the corresponding smoke guide plate. The bending portion 72 is consistent with the extension direction of the corresponding enclosure. In this embodiment, both ends have bending portions 72. Hereinafter, the bending portion 72 will also be used. The latter two ends can be locked (including the locking of each smoke guide plate and the locking of the disinfection device 5) as an example for explanation. An inner locking tongue 73 is provided on the opposite side of each bending portion 72 , and an outer locking tongue 74 is provided on a side of each bending portion 72 that is far away from each other. The body 71 of the locking device 7 can be telescopic in the front-to-back direction to move the positions of the inner locking tongue 73 and the outer locking tongue 74. The body 71 can be telescoped using an existing telescopic mechanism.

The front lining plate 162 and the rear lining plate 163 are respectively provided with first lock holes 165 and second lock holes 166 corresponding to the outer lock tongue 74. The respective first lock holes 165 of the front lining plate 162 and the rear lining plate 163 are positioned correspondingly. , located approximately in the middle position in the left and right direction, and there are two first lock holes 165 on each lining plate, spaced left and right, to correspond to the two smoke guide plates. The positions of the second keyholes 166 of the front lining plate 162 and the rear lining plate 163 correspond to each other. There are two second keyholes 166 on each lining plate. One of the second keyholes 166 is close to the first air inlet 11 and is the same as the second keyhole 166 . One smoke guide plate 41 corresponds to it, and the other second lock hole 166 is close to the second air inlet 12 and corresponds to the second smoke guide plate 42 . A lock 167 is provided on the front lining plate 162 and the rear lining plate 163 between the two first lock holes 165 . The above-mentioned first keyhole 165 corresponds to the open state of each smoke guide plate, and the second keyhole 166 corresponds to the closed state of each smoke guide plate. When the body 71 of the locking device 7 is extended, the outer locking tongue 74 is locked with the corresponding keyholes on the front and rear linings to achieve the fixation of the corresponding smoke guide plate. Refer to Figure 16, the corresponding lock of the first smoke guide plate 41 The outer locking tongue 74 of the locking device 7 is contracted with the first locking hole 165 on the rear liner 163 . Since the range hood will generate vibrations when running, locking each smoke guide plate can effectively reduce the vibration of the smoke guide plate and reduce the occurrence of abnormal noise. In addition, a sealing gasket (not shown) can be provided at each smoke guide plate. The locking can enhance the sealing of the gasket.

The disinfection device 5 includes a housing 51 and rotating arms 52 arranged on the front and rear sides of the housing 51. One end of the rotating arm 52 is rotationally connected to the housing 51, and the other end is a free end. The rotating arm 52 is provided with a third position near the free end. The lock hole 521 is used to fix the rotating arm 52. Referring to FIG. 3 , a third driving mechanism 53 for driving the rotating arm 52 to rotate is provided in the housing 51 , and may preferably be a motor. Referring to Figures 13 to 15, when the rotating arm 52 rotates to a horizontal position on one side (relative to the left or right side of the connection with the housing 51), the locking device 7 on the corresponding side smoke guide plate contracts, and the inner lock The tongue 73 interlocks with the third locking hole 521 of the rotating arm 52 to fix the rotating arm 52 . The housing 51 is provided with a fourth lock hole 511 for cooperating with the locks 167 on the front and rear linings to achieve locking and unlocking.

Referring to Figures 11 and 17, the end of the rotating arm 52 connected to the housing 51 has a raised portion 522 with an increased width. Referring to Figure 18, when the rotating arm 52 is rotated vertically downward (the free end is downward), The lock catch 167 interlocks with the fourth lock hole 511 on the housing 51; see Figure 19, when the rotating arm 52 rotates to a horizontal state, the protruding portion 522 of the rotating arm 52 is inserted between the lock catch 167 and the housing 51 , push the lock 167 toward the corresponding lining, so that the lock 167 leaves the fourth lock hole 511 and is unlocked. Since the rotating arm 52 is locked with the locking device 7 again, the disinfection device 5 at this time is in contact with the corresponding guide. The smoke plate is fixed. At this time, when the smoke guide plate rotates, the disinfection device 5 rotates synchronously with the smoke guide plate. See Figure 22. The arrow shows the direction of rotation. Referring to Figures 23 and 24, when the smoke guide plate is locked, the third driving mechanism 53 of the rotating arm 52 is started. Since the rotating arm 52 is fixed by the locking device 7, under the driving of the third driving mechanism 53, the disinfection device 5 Rotate, the arrow indicates the direction of rotation.

The positions of each lock catch and the corresponding key hole, and each lock tongue and the corresponding key hole are interchangeable.

Referring again to Figures 20 and 21, the sterilization device 5 also includes an upper jet plate 54 and a lower jet plate 55. The upper jet plate 54 has two, which are gradually inclined downward from the left and right sides of the housing 51 to the middle. In an "inverted figure eight" shape, the two upper jet plates 54 are arranged staggeredly, so that the first opening 541 is formed between the two upper jet plates 54 . Similarly, there are two lower jet plates 55, which extend gradually upward from the left and right sides of the housing 51 toward the middle to form a "figure-eight" shape. The two lower jet plates 55 are arranged staggeredly, so that the two lower jet plates 55 are A second opening 551 is formed between 55 . The casing 51 is divided into three chambers by the upper jet plate 54 and the lower jet plate 55. They are the first chamber Q1 located above the upper jet plate 54, and the first chamber Q1 located between the upper jet plate 54 and the lower jet plate 55. The second chamber Q2 and the third chamber Q3 located under the lower jet plate 55 are fluidly connected through the openings between the jet plates. A heater 56 is provided in the first chamber Q1, and a fan 57 is provided in the second chamber Q2. The axial direction of the fan 57 is consistent with the axial direction of the fan 3, and is also in the left and right direction. Therefore, it is provided on the left and right sides of the housing 51. Ventilation holes 512 are respectively provided on the wall. An ultraviolet lamp 58 is provided in the third chamber Q3.

The first opening 541 between the upper jet plates 54 and the second opening 551 between the lower jet plates 55 are respectively facing the direction of the air flow after the fan 57 rotates, so that the air flow can be quickly drawn out after the fan 57 is started. The upper jet plates 54 and The surfaces of the lower jet plate 55 that are far away from each other are provided with reflective covers or reflective coatings (not shown), which can reflect ultraviolet rays or infrared rays. The housing 51 is hollow corresponding to the upper surface of the first chamber Q1 and the lower surface of the third chamber Q3 so that ultraviolet light or infrared light can be emitted.

During the cooking process or after cooking, the oil guide groove 341 collects a large amount of oil dirt. The first cavity Q1 corresponds to the bottom of the oil guide groove 341. Since the heater 56 is provided in the first cavity Q1, the heater 56 can be started to heat the oil. After the heater 56 is heated, the hot air rises and acts on the lower part of the oil guide groove 341. In addition, since the upper surface of the upper jet plate 54 can reflect infrared light, it further promotes the heating of the lower part of the oil guide groove 341, softening the oil dirt in the oil guide groove 341, and reducing the oil dirt. Excessive condensation enhances the fluidity of the oil. The softened oil enters the interlayer between the front liner 162 and the front plate 161 along the first notch 342 on the oil guide groove 341 , and finally enters the oil collecting groove 15 through the second notch 171 . The hot air rises and the upper surface of the upper jet plate can reflect infrared light.

Therefore, during the rotation of the disinfection device 5 shown in Figures 23 and 24, the ultraviolet lamp 58 faces upward, so that the ultraviolet light can be swept to various positions in the air duct.

Referring again to Figure 2, an oxygen generator 8 is also provided between the disinfection device 5 and the bottom plate 17. The oxygen generator 8 is in contact with the bottom of the third chamber Q3 of the housing 51. The oxygen generator 8 and the third chamber Q3 are in contact with each other. The fluid communication is through the exhaust hole 81 on the oxygen generator 8 . The oxygen generating device 8 can generate oxygen, such as electrolyzing water to generate oxygen, and the oxygen molecules enter the third chamber Q3 of the disinfection device 5 through the exhaust hole 81 .

The working principle of the range hood of the present invention is as follows:

When the user performs double-sided cooking first and then single-sided cooking, it is assumed that cooking is performed on both burners first, and then the left burner is turned off and only the right burner is cooked. In this state, the range hood is turned on, and the two burners are cooked. The two smoke guide plates rotate synchronously to open the first air inlet 11 and the second air inlet 12. At this time, the two air inlets can smoke at the same time. When the user turns off the left burner and only cooks on the right burner, the second driving mechanism 66 separates the first gear 651 from the rack 654 and meshes with the third gear 653. The third gear 653 drives the first gear 651. The first smoke guide plate 41 on the left is rotated to close the first air inlet 11, and the air volume on the left side of the fan 3 decreases. Due to the decrease in air volume, that is, the work done by the left side of the impeller 32 decreases. When the power of the motor 33 remains unchanged, The impeller 32 will increase the work on the right side, which is manifested in the increase in the speed of the impeller 32, that is, the air volume on the right side increases, and the oil smoke suction effect is improved. When the speed of the impeller 32 remains unchanged, that is, the air volume on the right side remains unchanged, and the oil smoke suction effect remains unchanged. change, since the work done by the left side of the impeller 32 is reduced, the power of the motor 33 is appropriately reduced, thereby achieving an energy-saving effect. The single-side oil fume suction effect can be improved under the same energy consumption or the energy consumption can be reduced under the same oil fume suction effect.

When ozone cycle disinfection is required, the first smoke guide plate 41 and the second smoke guide plate 42 are closed, and the ultraviolet lamp 58 generates ultraviolet light with a wavelength of 184.9 nanometers. The ultraviolet light beam with a wavelength of 184.9 nanometers decomposes oxygen molecules in the air to generate free oxygen. Free oxygen combines with oxygen molecules to produce ozone. Since ozone sterilization needs to reach a certain concentration, and the internal space of the range hood is small and oxygen molecules are insufficient, the above-mentioned oxygen generator 8 is provided below the third chamber Q3 of the disinfection device 5. The oxygen generated by the oxygen generator 8 After the molecules enter the third chamber Q3 of the disinfection device 5 through the exhaust hole 81, a large amount of ozone is generated under the irradiation of ultraviolet light with a wavelength of 184.9 nanometers. At this time, the fan 57 in the second chamber Q2 of the disinfection device 5 starts, see figure 21. The arrow shows the gas flow path. Ozone enters the second chamber Q2 through the lower jet plate 55, then sequentially enters the right air duct inside the range hood, the inside of the volute 1, the left air duct, and finally returns to the second chamber Q2. The second chamber Q2 is used to supplement ozone to achieve ozone cycle disinfection. During the above process, the heater 56 does not operate.

After the ozone cycle disinfection is completed, the thermal cycle disinfection is started. The heater 56 works, the air in the first chamber Q1 of the sterilization device 5 is heated, the fan 57 in the second chamber Q2 is started, and the hot air enters the second chamber Q2 through the first opening 541 of the upper jet plate 54, and thereafter It sequentially enters the right air duct inside the range hood, the inside of the volute 1, the left air duct, and finally returns to the second chamber Q2, forming a thermal cycle inside the range hood. The function of the thermal cycle is that ① the hot air can decompose the ozone molecules inside the range hood into oxygen molecules, ② the hot air can sterilize and dry the inside of the range hood, and the dry environment is not easy to breed bacteria.

Since ozone and thermal disinfection require a long action time, ultraviolet disinfection can quickly sterilize the left/right air ducts. Referring to Figure 22, the disinfection device 5 and the first smoke guide plate 41 are synchronously flipped to the first smoke guide plate. 41 is closed, and then the first smoke guide plate 41 is locked; thereafter, referring to Figures 23 and 24, the third driving mechanism 53 of the rotating arm 52 is started. Since the rotating arm 52 is locked with the first smoke guide plate 41, the rotating arm is driven 52 will cause the disinfection device 5 to flip relative to the first smoke guide plate 41. At this time, the ultraviolet lamp 58 will generate ultraviolet light with a wavelength of 253.7 nanometers. The ultraviolet light of this wavelength can destroy the molecular structure of DNA or RNA in the cells of the microbial body to achieve the effect of disinfection and sterilization. . During the flipping process, the ultraviolet lamp 58 can irradiate the first air duct S1 with ultraviolet light from multiple angles to achieve comprehensive sterilization. The arrows in Figures 22 to 24 indicate the direction of movement. The sterilization of the second air duct S2 is the same as above. Since the rotating arm 52 and the ultraviolet lamp 57 are located at two opposite ends of the housing 51, when the rotating arm 52 is locked with the smoke guide plate, the ultraviolet lamp 57 remains upward to perform sterilization.

The term "fluid connection" in the present invention refers to the spatial positional relationship between two components or parts (hereinafter collectively referred to as the first part and the second part), that is, the ability of the fluid (gas, liquid or a mixture of the two) to Flows or/and is transported from the first part along the flow path to the second part, which may be directly connected between the first part and the second part, or may be through a flow path between the first part and the second part. At least one third party is indirectly connected, and the third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, groove, etc., or a chamber that allows fluid to flow through, or a combination thereof.

Claims (24)

1. The utility model provides a range hood, includes collection petticoat pipe (1), fan frame (2) and fan (3) of setting in fan frame (2) on collection petticoat pipe (1), fan (3) are two air inlet fans and axis extend in the left and right directions, set up first air intake (11) and second air intake (12) of arranging about on collection petticoat pipe (1);

the range hood further comprises a first smoke guide plate (41) and a second smoke guide plate (42); the method is characterized in that:

the first smoke-guiding plate (41) and the second smoke-guiding plate (42) can be at least in the following two states:

the first smoke guide plate (41) closes the first air inlet (11), and the second smoke guide plate (42) closes the second air inlet (12);

in an open state, at least one of the first smoke guide plate (41) and the second smoke guide plate (42) turns towards the inside of the smoke collecting hood (1) to open a corresponding air inlet, so that a space positioned on the left side of the first smoke guide plate (41) and on the left side of the fan (3) in the fan frame (2) in the smoke collecting hood (1) forms a first air channel (S1), and/or a space positioned on the right side of the second smoke guide plate (42) and on the right side of the fan (3) in the fan frame (2) in the smoke collecting hood (1) forms a second air channel (S2), and the first air channel (S1) and the second air channel (S2) are mutually isolated.

2. The range hood of claim 1, wherein: the bottom surface of collection petticoat pipe (1) is the V font, the bottom surface of collection petticoat pipe (1) is including first curb plate (13) that are located the left side and second curb plate (14) that are located the right side, first curb plate (13) are from left to right decurrent gradually, second curb plate (14) are from left decurrent gradually, and the department of handing-over of two curb plates is the lowest position of collection petticoat pipe (1) bottom surface, first air intake (11) are seted up on first curb plate (13), second air intake (12) are seted up on second curb plate (14).

3. The range hood of claim 2, wherein: the right edge of the first air inlet (11) is higher than the right end part of the first side plate (13), and the left edge of the second air inlet (12) is higher than the left end part of the second side plate (14); the fume collecting hood (1) further comprises a bottom plate (17), the bottom plate (17) is arranged above the intersection of the first side plate (13) and the second side plate (14), the left side and the right side of the bottom plate (17) are lower than the lower edge of the corresponding air inlet, and a space between the two side plates of the fume collecting hood (1) below the bottom plate (17) is formed into an oil collecting groove (15).

4. The range hood of claim 1, wherein: the end parts of the two smoke guide plates, which are close to each other, are respectively first end parts, the end parts of the two smoke guide plates, which are far away from each other, are respectively second end parts, the first end parts are restrained by the smoke collecting hood (1), and the second end parts are free ends;

The smoke collecting cover (1) is rotatably provided with a rotating shaft (45), a first end of the first smoke guide plate (41) is fixed with the corresponding rotating shaft (45) through a first connecting rod (461), a first end of the second smoke guide plate (42) is fixed with the corresponding rotating shaft (45) through a second connecting rod (462), and the rotating axis of the rotating shaft (45) extends in the front-rear direction.

5. The range hood of claim 4, wherein: a first flexible piece (441) is connected between the position of the first side plate (13) located at the lower edge of the first air inlet (11) and the first end of the first smoke guide plate (41), and a second flexible piece (442) is connected between the position of the second side plate (14) located at the lower edge of the second air inlet (12) and the first end of the second smoke guide plate (42).

6. The range hood of claim 4, wherein: the range hood further comprises a movement mechanism for driving the first smoke guide plate (41) and the second smoke guide plate (42) so that the first smoke guide plate (41) and the second smoke guide plate (42) can move synchronously or independently.

7. The range hood of claim 6, wherein: the motion mechanism comprises a first driving mechanism (63), a second driving mechanism (66) and a transmission mechanism, the transmission mechanism comprises a first gear (651), a second gear (652), a third gear (653) and a rack (654), the first gear (651) is arranged on the left side of the rack (654) and the second gear (652) is arranged on the right side of the rack (654), the first gear (651) and the second gear (652) are respectively fixed with one rotating shaft (45), and the third gear (653) can rotate relative to the fume collecting hood (1);

The first driving mechanism (63) is used for driving the rack (654) to lift, the second driving mechanism (66) is used for driving the first gear (651) or the second gear (652) to move back and forth, and when the first gear (651) and the second gear (652) are respectively meshed with the rack (654), the first driving mechanism (63) drives the rack (654) to lift and can simultaneously drive the first gear (651) and the second gear (652) to rotate, so that the two smoke guide plates can be driven to synchronously move; when the second driving mechanism (66) drives the first gear (651) or the second gear (652) to move away from the rack (654) to be meshed with the third gear (653), the two smoke guide plates independently move.

8. The range hood of claim 1, wherein: the first and second smoke-guiding plates (41, 42) are lockable with the smoke-collecting hood (1) in a closed state and an open state.

9. The range hood of claim 8, wherein: each smoke guide plate is provided with a locking device (7) towards one side in the smoke collecting cover (1), the locking device (7) is provided with an outer lock tongue (74) close to the front side and/or the rear side of the smoke collecting cover (1), a first lock hole (165) and a second lock hole (166) are formed in corresponding positions of the smoke collecting cover (1), the first lock hole (165) is used for locking with the outer lock tongue (74) in the closed state of each smoke guide plate, and the second lock hole (166) is used for locking with the outer lock tongue (74) in the open state of each smoke guide plate.

10. The range hood of claim 1, wherein: a sterilizing device (5) is arranged between the bottom in the fume collecting hood (1) and the bottom of the fan (3), and the first smoke guide plate (41) or the second smoke guide plate (42) is closed at the corresponding side of the sterilizing device (5) when being opened.

11. The range hood of claim 10, wherein: the disinfection device (5) comprises a shell (51) and rotating arms (52) arranged on the front side and the rear side of the shell (51), one end of each rotating arm (52) is rotationally connected with the shell (51), the other end of each rotating arm is a free end, the free ends of the rotating arms (52) can be locked or unlocked with each smoke guide plate, and the shell (51) can be locked or unlocked with the smoke collecting hood (1).

12. The range hood of claim 11, wherein: ultraviolet lamp (58) are arranged in the shell (51), the rotating arm (52) and the ultraviolet lamp (58) are located at two opposite end parts of the shell (51), and the end part of the shell (51) corresponding to the ultraviolet lamp (58) is hollowed out.

13. The range hood of claim 11, wherein: one side of each smoke guide plate facing into the smoke collecting hood (1) is provided with a locking device (7), the locking device (7) is provided with an inner lock tongue (73) close to the front side and/or the rear side of the smoke collecting hood (1), and the inner lock tongue (73) can be locked and unlocked with the rotating arm (52).

14. The range hood of claim 11, wherein: a lock catch (167) is arranged on the fume collecting hood (1), and the lock catch (167) can be locked or unlocked with the shell (51).

15. The range hood of claim 14, wherein: the end part of the rotating arm (52) rotationally connected with the shell (51) is provided with a protruding part (522), and when the free end of the rotating arm (52) is downward, the lock catch (167) is locked with the shell (51); when the rotating arm (52) rotates to a horizontal state, the protruding portion (522) of the rotating arm (52) is inserted between the lock catch (167) and the housing (51), so that the lock catch (167) is released from the housing (51).

16. The range hood of claim 10, wherein: the fan (3) comprises a volute (31) and an oil guide (34) arranged at the bottom of the volute (31), the disinfection device (5) comprises a shell (51), and a heater (56) is arranged on the shell (51) close to the oil guide (34).

17. The range hood of claim 10, wherein: the disinfection device (5) comprises a shell (51), and an ultraviolet lamp (58) is arranged in the shell (51).

18. The range hood of claim 17, wherein: the bottom of the disinfection device (5) is provided with an oxygen generator (8) which can prepare oxygen and is led into the shell (51) to be matched with the ultraviolet lamp (58).

19. The range hood of claim 10, wherein: the disinfection device (5) comprises a shell (51), wherein a heater (56) and/or an ultraviolet lamp (58) are arranged in the shell (51), and a fan (57) which can blow out the hot air heated by the heater (56) or ozone generated by the ultraviolet lamp (58) into the shell (51) is also arranged in the shell (51).

20. The range hood of claim 19, wherein: the left and right side wall surfaces of the shell (51) are respectively provided with a vent hole (512), and the fan (57), the vent hole (512) on one side, the fan (3) and the vent hole (512) on the other side form a passage for circulating hot air or ozone.

21. The range hood of claim 16, wherein: the shell (51) and the heater (56) are hollow at the corresponding end parts, and an upper jet plate (54) for reflecting hot air heated by the heater (56) to the oil guide (34) is arranged in the shell (51).

22. The range hood of claim 17, wherein: the ultraviolet lamp is characterized in that the end part of the shell (51) corresponding to the ultraviolet lamp (58) is hollowed out, and a lower reflecting plate (55) used for reflecting ultraviolet rays generated by the ultraviolet lamp (58) to the outside of the shell (51) is arranged in the shell (51).

23. The range hood of claim 1, wherein: the fan (3) comprises a volute (31) and an oil guide piece (34) arranged at the bottom of the volute (31), wherein the oil guide piece (34) is in a shape with the top surface recessed downwards, and therefore an oil guide groove (341) is formed in the oil guide piece (34).

24. The range hood of claim 23 wherein: an oil collecting groove (15) is formed in the bottom of the smoke collecting cover (1), and the oil guiding groove (341) can be communicated with the oil collecting groove (15);

the smoke collecting hood (1) further comprises a front plate (161), a front lining plate (162), a rear lining plate (163) and a rear plate (164) which are sequentially arranged at intervals from front to back, a space between the front plate (161) and the front lining plate (162) is formed into a first interlayer (181), a space between the rear lining plate (163) and the rear plate (164) is formed into a second interlayer (182), the first smoke guide plate (41) and the second smoke guide plate (42) are positioned between the front lining plate (162) and the rear lining plate (163), and the oil guide grooves (341) and the oil collecting grooves (15) are communicated with the same interlayer of the two interlayers.