Range hood and working method

Abstract

The present invention relates to a range hood, comprising a fan cover, a fan arranged in the fan cover, and a connecting cover arranged below the fan cover, a first smoke collecting cover, and a second smoke collecting cover, wherein the first smoke collecting cover and the second smoke collecting cover can be relatively opened and closed and rotatably connected to the connecting cover, and the connecting cover is respectively connected to the first smoke collecting cover, the second smoke collecting cover, and the fan cover. The present invention also relates to a working method of the range hood, wherein when the range hood is started, the first smoke collecting cover and the second smoke collecting cover are controlled to be relatively opened; after the range hood stops working, the first smoke collecting cover and the second smoke collecting cover are controlled to be relatively closed. The range hood can prevent the spillage of oily dirt and odor, and can adjust the rising path of oil smoke to reduce the escape of oil smoke.

Description

Technical Field

[0001] The invention relates to a range hood and also relates to a working method of the range hood. Background Art

[0002] In order to keep the kitchen environment clean and the human body healthy, the range hood has become one of the essential household appliances in modern family kitchens. After long-term use, a large amount of oil will condense inside the range hood. The oil adheres to the impeller of the range hood, which will increase the load of the impeller, block the gap between the blades, and cause the noise of the range hood to increase. In addition, the air inlet of the top-suction range hood is usually exposed to the outside, so the oil adsorbed in the inner cavity of the range hood will emit odor through the air inlet, spread to the kitchen and affect people's health.

[0003] There are range hoods that can achieve self-cleaning on the current market, such as a steam self-cleaning range hood disclosed in Chinese patent application number 201820956668.7, which includes: a range hood body, an impeller arranged in the range hood body, and a steam self-cleaning range hood. The steam self-cleaning range hood also includes a steam cleaning module, which includes a heating pipe, the water inlet end of the heating pipe is connected to a water pump, and the water outlet end of the heating pipe is connected to a nozzle through a water outlet pipe, and the nozzle is aligned with the impeller. In this way, self-cleaning is achieved by spraying water or steam or other cleaning liquids on the blades through the nozzle. However, this type of range hood can usually only be cleaned locally, and the nozzle in this cleaning module is exposed to the oil fume environment, and the nozzle will be blocked during the long-term use of the range hood, thereby gradually losing the self-cleaning function, and the process of nozzle clogging will gradually increase the burden on the water pump, and even the water pump will burn out. During the cleaning process, the cleaning liquid needs to be continuously sprayed to ensure the cleaning effect, and the cleaning liquid cannot be reused, which will consume a large amount of cleaning liquid and water resources.

[0004] In addition, the smoke hood of a common ceiling-type range hood is set under the fan frame. The position of the smoke hood is higher than the stove top. When cooking, the oil smoke will explode, rise, and diffuse. The ceiling-type range hood usually draws smoke at the oil smoke diffusion position. Especially when stir-frying on one side during the cooking process, it is particularly easy for the oil smoke to escape from one side of the range hood. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a range hood that can prevent the spillage of oil and odor and can adjust the rising path of oil smoke to reduce the escape of oil smoke in response to the above-mentioned prior art.

[0006] The second technical problem to be solved by the present invention is to provide a range hood that can completely clean the path through which oil smoke flows, and can realize the recycling of steam to reduce the consumption of cleaning liquid in response to the above-mentioned prior art.

[0007] The third technical problem to be solved by the present invention is to provide a working method of the range hood as mentioned above in view of the above-mentioned prior art.

[0008] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a range hood, including a fan cover and a fan arranged in the fan cover, characterized in that it also includes a connecting cover, a first smoke collecting hood, and a second smoke collecting hood arranged below the fan cover, the first smoke collecting hood and the second smoke collecting hood can be rotatably connected to the connecting cover in a relatively open and closed manner, and the connecting cover is respectively connected to the first smoke collecting hood, the second smoke collecting hood, and the fan cover.

[0009] Preferably, the first smoke collecting hood and the second smoke collecting hood are arranged in the left-right direction in front of the connecting hood, and the first smoke collecting hood and the second smoke collecting hood both have a rotating part rotatably connected to the connecting hood, the axis of the rotating part extends in the front-back direction, and the rotating part has a channel for connecting to the connecting hood.

[0010] In order to facilitate the rotational installation of the first smoke collecting hood and the second smoke collecting hood, a connecting plate extending forward is provided on the front side of the connecting hood, and smoke inlets are respectively provided on both sides of the connecting plate on the front side of the connecting hood;

[0011] The rotating parts of the first smoke collecting hood and the second smoke collecting hood are both cylindrical, the front end of the rotating part is covered with a front end plate, the rear end of the rotating part is opened and communicated with the connecting cover, and the rear end of the rotating part is provided with an embedded part that is rotatably embedded in the smoke inlet;

[0012] The front ends of the connecting plates are bent in front of the rotating parts of the first and second smoke hoods to form fixed plates, on which support columns are fixedly provided. The rotating parts of the first and second smoke hoods are both fixedly provided with first motors, and the rotating shafts of the first motors are connected to the support columns.

[0013] The technical solution adopted by the present invention to solve the second technical problem is: after the first smoke collecting hood and the second smoke collecting hood are matched, a receiving cavity is formed at the matched position, and a cleaning component that can extend into the receiving cavity is provided in the connecting hood.

[0014] Preferably, the first smoke collecting hood and the second smoke collecting hood both comprise a cover shell having an opening and a filter covering the opening, and a recessed area is provided on the filter of the first smoke collecting hood and / or the second smoke collecting hood, and the recessed area of ​​the first smoke collecting hood and / or the second smoke collecting hood forms the accommodating cavity after the first smoke collecting hood and the second smoke collecting hood are matched.

[0015] Preferably, the filter screens of the first smoke collecting hood and the second smoke collecting hood are bent in a step-like manner to form the recessed area.

[0016] In order to ensure that the cleaning component is not polluted by oil smoke, an installation space independent of the oil smoke passage is provided in the connection cover, and the cleaning component is movably arranged in the installation space.

[0017] Preferably, a driving mechanism for driving the cleaning component to move is also provided in the installation space.

[0018] The structure is simple. The driving mechanism comprises a second motor and a gear connected to a driving end of the second motor. The cleaning component is provided with a rack meshing with the gear.

[0019] Preferably, the cleaning component includes a water tank, a heating pipe connected to the water tank through a connecting pipe, a fan that can be extended into the accommodating cavity, and a nozzle arranged at the outlet of the heating pipe and extending into the fan.

[0020] The technical solution adopted by the present invention to solve the third technical problem is: a working method of a range hood, characterized in that: the range hood is the range hood as described above;

[0021] When the range hood is started, the first fume hood and the second fume hood are controlled to open relatively;

[0022] After the range hood stops working, the first fume hood and the second fume hood are controlled to be relatively closed.

[0023] The technical solution adopted by the present invention to solve the third technical problem is: a working method of a range hood, characterized in that: the range hood is the range hood as described above;

[0024] When the range hood is in operation, the opening angles of the first fume hood and the second fume hood relative to the mating surface are adjusted based on the fume concentrations on the left and right sides below.

[0025] The technical solution adopted by the present invention to solve the third technical problem is: a working method of a range hood, characterized in that: the range hood is the range hood as described above;

[0026] When the range hood needs to be self-cleaned, the first fume hood and the second fume hood are controlled to be in a relatively closed state; the cleaning component is controlled to be driven to move into the accommodating cavity formed by the first fume hood and the second fume hood being combined, and then the cleaning component is controlled to work to generate clean water vapor, so that the clean water vapor circulates in the circulation path;

[0027] The circulation path is a path formed by the first smoke collecting hood, the left air duct of the connecting hood, the fan hood, the right air duct of the connecting hood, and the space inside the second smoke collecting hood.

[0028] Compared with the prior art, the advantages of the present invention are as follows: the two smoke hoods of the range hood of the present invention can be relatively opened and closed and rotated, and can be connected with the fan cover through the connecting cover. On the one hand, the two smoke hoods form two oil fume channels through their own structures, so as to better realize the suction of oil fume on the left and right sides below. On the other hand, the two smoke hoods are relatively matched when oil fume suction is not in progress, avoiding the problem of oil stains inside the smoke hoods being exposed to the outside and causing odor to overflow. At the same time, based on the control of the rotation angle of the first smoke hood and the second smoke hood, the rising path of the oil fume can be changed, thereby greatly improving the oil fume suction effect.

[0029] In addition, the range hood of the present invention is provided with a cleaning component that can extend into the joint of the two smoke hoods, so that the cleaning medium of the cleaning component can form a circulation loop in the two smoke hoods, the connecting hood and the fan hood, thereby making full use of the cleaning medium and completing the oil cleaning work while saving a large amount of cleaning resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional diagram of the range hood in the embodiment of the present invention in the working state of extracting oil smoke.

[0031] Figure 2 for Figure 1 3D exploded view of .

[0032] Figure 3 for Figure 2 Rear perspective view.

[0033] Figure 4 It is a diagram of the internal structure of the first smoke collecting hood, the second smoke collecting hood and the connecting hood in the embodiment of the present invention.

[0034] Figure 5 It is a three-dimensional diagram of the range hood in the embodiment of the present invention when it is not working or is in a cleaning state.

[0035] Figure 6 This is a state diagram of the cleaning component when it is moved out of the connection cover in an embodiment of the present invention.

[0036] Figure 7 Figure 4 sectional view of .

[0037] Figure 8 This is an exploded view of the cooperation between the cleaning component and the filters in the first and second fume hoods in the embodiment of the present invention.

[0038] Fig. 9 for Figure 4 Another cross-sectional view of .

[0039] Fig.10 This is a working state diagram of the first smoke collecting hood and the second smoke collecting hood in the embodiment of the present invention.

[0040] Fig.11 This is another working state diagram of the first smoke collecting hood and the second smoke collecting hood in the embodiment of the present invention.

[0041] Fig.12 This is another working state diagram of the first smoke collecting hood and the second smoke collecting hood in the embodiment of the present invention.

[0042] Fig.13 FIG. 1 is a circulation path diagram of water vapor during cleaning work in an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below with reference to the accompanying drawings.

[0044] like Figures 1 to 9 As shown, the range hood in this embodiment includes a fan cover 1, a fan 2, a connecting cover 3, a first fume collecting hood 4, and a second fume collecting hood 5.

[0045] The fan 2 is arranged in the fan cover 1. The connecting cover 3 is fixedly arranged below the fan cover 1, and the first smoke collecting cover 4 and the second smoke collecting cover 5 can be relatively opened and closed and rotatably connected to the connecting cover 3, and the connecting cover 3 is respectively connected with the first smoke collecting cover 4, the second smoke collecting cover 5, and the fan cover 1. The connecting cover 3 facilitates the rotation connection of the first smoke collecting cover 4 and the second smoke collecting cover 5, and also facilitates the connection between the first smoke collecting cover 4, the second smoke collecting cover 5 and the fan cover 1.

[0046] Usually, the cooker has two burners distributed on the left and right, and the first smoke hood 4 and the second smoke hood 5 are distributed along the left and right directions. Specifically, the first smoke hood 4 is arranged on the left side, and the second smoke hood 5 is arranged on the right side. The first smoke hood 4 and the second smoke hood 5 can be swung together in the front-back direction, and the first smoke hood 4 and the second smoke hood 5 can also be swung together in the up-down direction as needed.

[0047] The first smoke hood 4 and the second smoke hood 5 both include a housing 400 with an opening and a filter 500 covering the opening. The filter 500 forms the air inlet of the first smoke hood 4 and the second smoke hood 5. The space enclosed by the housing 400 and the filter 500 forms a smoke collecting channel. When the first smoke hood 4 and the second smoke hood 5 are relatively open, under the action of the fan 2, the oil smoke can enter the first smoke hood 4 and the second smoke hood 5 through the filter 500, and then enter the fan cover 1 through the space in the connecting cover 3. When the first smoke hood 4 and the second smoke hood 5 are matched, the filters 500 in the first smoke hood 4 and the second smoke hood 5 are opposite, that is, the air inlets of the first smoke hood 4 and the second smoke hood 5 are relatively closed.

[0048] In the present embodiment, the filter screens 500 in the first smoke hood 4 and the second smoke hood 5 are both in the form of vertically arranged strip grilles, and the strip grilles of the filter screens in the first smoke hood 4 and the second smoke hood 5 are arranged alternately. Thus, when the first smoke hood 4 and the second smoke hood 5 are matched, the strip grilles on the corresponding filter screen parts on the first smoke hood 4 and the second smoke hood 5 are alternately closed, thereby further improving the sealing performance of the first smoke hood 4 and the second smoke hood 5 after being matched, and preventing the leakage of oil stains and odors.

[0049] In this embodiment, the connection cover 3 is arranged at the rear part below the fan cover 1, and the top of the connection cover 3 is open and connected to the fan cover 1. The first smoke collecting cover 4 and the second smoke collecting cover 5 are arranged in the left-right direction in front of the connection cover 3, and the first smoke collecting cover 4 and the second smoke collecting cover 5 can be swung up and down and connected to the upper part of the connection cover 3. Aesthetically, the height of the fan cover 1 in the vertical direction is equivalent to the height of the first smoke collecting cover 4 and the second smoke collecting cover 5 when they are swung down to be in a matched state.

[0050] The first smoke hood 4 and the second smoke hood 5 both have a rotating part 100 that is rotatably connected to the connecting hood 3, and the axis of the rotating part 100 extends in the front-to-back direction, so that the first smoke hood 4 and the second smoke hood 5 realize the rotatable connection of the first smoke hood 4 and the second smoke hood 5 on the connecting hood 3 through the rotating part 100. In this embodiment, the rotating part 100 of the first smoke hood 4 and the second smoke hood 5 is a part of its housing 400. The rotating part 100 of the first smoke hood 4 is located on the right side, and the rotating part 100 of the second smoke hood 5 is located on the left side. The rotating parts 100 of the first smoke hood 4 and the second smoke hood 5 are almost close together, so that the first smoke hood 4 and the second smoke hood 5 can be rotated downward to form a matching state. There is a channel for connecting the connecting hood 3 in the rotating part 100, that is, the channel in the rotating part 100 is used as a connecting channel between the space inside the first smoke hood 4 and the second smoke hood 5 and the space inside the connecting hood 3.

[0051] The specific connection structure of the first smoke collecting hood 4 and the second smoke collecting hood 5 on the connecting hood 3 is as follows: a connecting plate 31 extending forward in the connecting hood 3, the connecting plate 31 divides the flow space of the oil smoke into two parts, left and right, and smoke inlets 32 are respectively provided on the front side of the connecting hood 3 on the left and right sides of the connecting plate 31. The rotating parts 100 of the first smoke collecting hood 4 and the second smoke collecting hood 5 are both cylindrical, the front end of the rotating part 100 is covered with a front end plate 101, the rear end of the rotating part 100 is opened and communicated with the connecting hood 3, and the rear end of the rotating part 100 is provided with an embedded part 102 that is rotatably embedded in the smoke inlet 32, and the embedded part 102 realizes the rotation support of the rear end of the rotating part 100 on the connecting hood 3. The front end of the connecting plate 31 is bent toward the front of the rotating part 100 of the first smoke hood 4 and the second smoke hood 5 to form a fixing plate 311, and a supporting column 312 is fixedly provided on the fixing plate 311. The first motor 200 is fixedly provided in the rotating part 100 of the first smoke hood 4 and the second smoke hood 5, and the rotating shaft of the first motor 200 is connected to the supporting column 312, and the rotating support of the front end of the rotating part 100 on the fixing plate 311 is realized through the supporting column 312. When it is necessary to drive the first smoke hood 4 and the second smoke hood 5 to rotate, the first motor 200 in the rotating part 100 of the corresponding smoke hood is controlled to work, and the rotating shaft of the first motor 200 rotates. Since the supporting column 312 is fixed and cannot rotate, the corresponding smoke hood rotates with the first motor 200, so that the first smoke hood 4 and the second smoke hood 5 swing up and down.

[0052] In addition, the range hood is also provided with a cleaning component 6 for self-cleaning of oil stains inside the range hood. The cleaning medium of the cleaning component 6 in this embodiment is water vapor, so that it is convenient for water vapor to perform mobile cleaning. The cleaning component 6 is arranged in the connection cover 3, and can move forward and backward relative to the connection cover 3 through the driving mechanism 7 in the connection cover 3, so that the cleaning component 6 can enter the matching position of the first smoke collection cover 4 and the second smoke collection cover 5 when the two are matched, and then based on the connection relationship between the first smoke collection cover 4, the second smoke collection cover 5 and the connection cover 3, the fan cover 1, the first smoke collection cover 4, the second smoke collection cover 5 and the connection cover 3, the fan cover 1 are cleaned of the oil stains inside.

[0053] In order to facilitate the cleaning component 6 to enter the mating position of the first smoke hood 4 and the second smoke hood 5 when they are mated, and not to affect the mating state of the first smoke hood 4 and the second smoke hood 5. In this embodiment, a receiving cavity 300 is formed at the mating position after the first smoke hood 4 and the second smoke hood 5 are mated. Since the connecting hood 3 is arranged at the rear of the first smoke hood 4 and the second smoke hood 5, the receiving cavity 300 is located at the rear of the mating position of the first smoke hood 4 and the second smoke hood 5, and the receiving cavity 300 is opened in the direction of the connecting hood 3, so that the cleaning component 6 can be extended from the connecting hood 3 and then enter the receiving cavity 300.

[0054] The mating surfaces of the first smoke hood 4 and the second smoke hood 5 are the surfaces where their filter screens 500 are located, and the side surfaces of the corresponding accommodating cavity 300 are the filter screens 500 surfaces of the first smoke hood 4 and the second smoke hood 5. In this way, the water vapor generated when the cleaning component 6 is working can pass through the filter screens 500 of the first smoke hood 4 and the second smoke hood 5 into the connecting cover 3, and then enter into the fan cover 1, thereby cleaning the entire internal space of the range hood.

[0055] Based on the structure that both the first smoke hood 4 and the second smoke hood 5 include a cover shell 400 with an opening and a filter 500 covering the opening, in this embodiment, a recessed area 501 is provided on the filter 500 of the first smoke hood 4 and / or the second smoke hood 5, and the recessed area 501 of the first smoke hood 4 and / or the second smoke hood 5 forms the aforementioned accommodating chamber 300 after the first smoke hood 4 and the second smoke hood 5 are matched. Specifically, the filter 500 of the first smoke hood 4 and the second smoke hood 5 are bent in a step-like manner to form the recessed area 501. In this embodiment, the rear wall surfaces of the first smoke hood 4 and the second smoke hood 5 are in contact with the front wall of the connecting hood 3. Therefore, even if the accommodating chamber 300 is formed after the first smoke hood 4 and the second smoke hood 5 are matched, the accommodating chamber 300 is also covered by the connecting hood 3, and there will be no overflow of oil, dirt, and odor.

[0056] The cleaning component 6 is arranged in the connecting cover 3. In order to prevent the oil smoke entering the connecting cover 3 from contaminating the cleaning component 6, in this embodiment, an installation space 33 independent of the oil smoke passage is provided in the connecting cover 3, and the cleaning component 6 is arranged in the installation space 33. In this embodiment, the installation space 33 is located at the lower part of the connecting cover 3, that is, a partition is provided in the connecting cover 3, and then through the isolation of the partition, the lower space of the connecting cover 3 forms the installation space 33, and the upper space of the connecting cover 3 forms a flow channel for the oil smoke to pass through.

[0057] The cleaning assembly 6 in this embodiment includes a water tank 61, a heating pipe 63, a fan 64, and a nozzle 65. The water tank 61 is connected to the water tank 62 through a connecting pipe 62. In order to realize automatic water supply, a water pump can be set on the connecting pipe 62. The fan 64 can be driven forward by the driving mechanism 7 to enter the aforementioned accommodating chamber 300, or can be retracted into the installation space 33 of the connecting cover 3 based on the driving mechanism 7. The driving mechanism 7 in this embodiment is also installed in the installation space 33 of the connecting cover 3 to avoid oil fume pollution. The outlet of the heating pipe 63 and the nozzle 65 extending into the fan 64. When cleaning, the driving mechanism 7 drives the fan 64 into the accommodating chamber 300 formed by the first smoke collecting hood 4 and the second smoke collecting hood 5. The water in the water tank 61 is introduced into the heating pipe 63 through the connecting pipe 62, and the heating pipe 63 heats the water to a high temperature state, and then sprays it out through the vaporization nozzle 65. What is sprayed out through the nozzle 65 is high-temperature steam. The fan 64 is controlled to work. Under the action of the fan 64, high-temperature steam circulates in a circulation loop formed in the two smoke collecting hoods, the connecting hood 3, and the fan hood 1, thereby continuously cleaning the oil stains. Since the water vapor can circulate, a large amount of cleaning liquid and water can be disposed of.

[0058] The driving mechanism 7 includes a second motor 71, a gear 72 connected to the driving end of the second motor 71, and a rack 73 meshing with the gear 72 is provided on the cleaning assembly 6. In this embodiment, the rack 73 is fixed to the bottom of the fan 64. When in use, the gear 72 is driven to rotate forward and reversely by the forward and reverse rotation of the second motor 71, and the fan 64 is driven forward and backward based on the meshing transmission of the gear 72 and the rack 73.

[0059] The working method of the aforementioned range hood includes the following contents.

[0060] When the range hood is started, the first fume hood 4 and the second fume hood 5 are controlled to be relatively open, so that the fume under the range hood can be sucked into the public flue through the first fume hood 4 / the second fume hood 5, the connecting hood 3, and the fan hood 1 under the action of the fan 2, so as to realize the fume suction work. When the range hood stops working, the first fume hood 4 and the second fume hood 5 are controlled to be relatively closed, so that the first fume hood 4 and the second fume hood 5 are in a closed state. On the one hand, the filter 500 of the first fume hood 4 and the second fume hood 5 is hidden, making the product appearance cleaner, neater and more beautiful. At the same time, the oily smell on the fume hood, the connecting hood 3, the fan hood 1, and the fan 2 cannot spread to the kitchen, thereby improving the user experience.

[0061] In addition, when the range hood is working, the opening angles of the first smoke hood 4 and the second smoke hood 5 relative to the mating surface are adjusted based on the smoke concentrations on the left and right sides below. The smoke concentration detection on the left and right sides below the range hood can be achieved using existing technical means. When the smoke concentration on one side is greater, the opening angle of the corresponding smoke hood relative to the mating surface is greater.

[0062] In this embodiment, Fig.10 As shown, when the left / right cookers under the range hood are cooking at the same time and the amount of oil smoke is similar, the first smoke collecting hood 4 and the second smoke collecting hood 5 are controlled to flip to a horizontal state. At this time, the smoke trap area is the largest, ensuring the effect of oil smoke extraction.

[0063] like Fig.11 As shown, when the left side is used for steaming rice and the right side is used for stir-frying, that is, the smoke concentration on the left side is less than that on the right side, the angle at which the left smoke hood (first smoke hood 4) is turned relative to the mating surface is controlled to be smaller than the angle at which the right smoke hood (second smoke hood 5) is turned relative to the mating surface. In this embodiment, the left smoke hood (first smoke hood 4) is tilted relative to the horizontal plane, while the right smoke hood (second smoke hood 5) is turned to a horizontal state. At this time, the air intake flow of the air inlet of the left smoke hood (first smoke hood 4) changes from bottom to top to side to the upper left. Since the left smoke hood is tilted, although the smoke cage area on the left side is reduced, that is, the vertical downward projection area of ​​the left air inlet is reduced, the air inlet position of the left smoke hood is moved downward, that is, smoking is done at a lower position, and the smoking effect on the left side can still be guaranteed when the amount of oil smoke is not large. The right stove produces a lot of oil smoke when frying, and the right smoke hood is flipped to a horizontal position to maximize the smoke trap area on the right side. At this time, the air inlet direction of the left smoke hood is inclined to the left and upward. The air flow deflects the oil smoke on the right side to the left, realizing the change of the oil smoke path, thereby reducing the phenomenon of oil smoke escaping on the right side and improving the smoking effect.

[0064] like Fig.12 As shown, when the left stove is not cooking and the right stove is cooking and generating a large amount of oil smoke, the left smoke hood (first smoke hood 4) is in a vertical downward position, and the right smoke hood (second smoke hood 5) is flipped to a horizontal position. At this time, the air inlet position of the left smoke hood is flipped to the lowest position and is close to the cooking utensils placed on the right stove. The oil smoke generated by the cooking on the right stove will be partially sucked away by the left smoke hood during the rising stage, and the other part will be sucked away by the right smoke hood during the diffusion stage. The oil smoke path is also deflected to prevent the oil smoke from escaping to the right.

[0065] In this way, based on the different smoke concentrations on both sides below the range hood, by adjusting the opening angles of the first smoke collecting hood 4 and the second smoke collecting hood 5, it is more conducive to the extraction of oil smoke on the one hand, and can prevent the oil smoke from escaping on the other hand.

[0066] like Fig.13As shown, when the range hood needs to be self-cleaned, the first smoke hood 4 and the second smoke hood 5 are controlled to be in a relatively closed state; the cleaning component 6 is controlled to move to the accommodation cavity 300 formed by the first smoke hood 4 and the second smoke hood 5, and then the cleaning component 6 is controlled to work to generate clean water vapor, so that the clean water vapor circulates in the circulation path. The circulation path is the path formed by the first smoke hood 4, the left air duct of the connecting hood 3, the fan cover 1, the right air duct of the connecting hood 3, and the space inside the second smoke hood 5. Based on the rotation direction of the fan 64, it is further determined whether the water vapor flows clockwise or counterclockwise in the circulation path. Under the action of the fan 64, the clean water vapor can circulate in the circulation path, and continuously clean the oil stains on the two smoke hoods, the connecting hood 3, the fan cover 1, and the fan 2, which can not only ensure the cleaning effect, but also save cleaning liquid and water resources on the street.

[0067] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0068] The "connectivity" referred to in the present invention refers to the spatial position relationship between two components or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A range hood, comprising a fan cover (1) and a fan (2) arranged in the fan cover (1), characterized in that: It also comprises a connecting cover (3), a first smoke collecting cover (4), and a second smoke collecting cover (5) arranged below the fan cover (1); the first smoke collecting cover (4) and the second smoke collecting cover (5) are connected to the connecting cover (3) in a rotatable manner so as to open and close relative to each other; and the connecting cover (3) is respectively connected to the first smoke collecting cover (4), the second smoke collecting cover (5), and the fan cover (1); The first smoke collecting hood (4) and the second smoke collecting hood (5) are arranged in a left-right direction in front of the connecting hood (3); the first smoke collecting hood (4) and the second smoke collecting hood (5) both have a rotating part (100) rotatably connected to the connecting hood (3); the axis of the rotating part (100) extends in a front-rear direction; and the rotating part (100) has a passage for connecting to the connecting hood (3); A connecting plate (31) extending forward in the connecting cover (3), and smoke inlets (32) are respectively provided on both sides of the connecting plate (31) on the front side surface of the connecting cover (3); The rotating parts (100) of the first smoke collecting hood (4) and the second smoke collecting hood (5) are both cylindrical, the front end of the rotating part (100) is covered with a front end plate (101), the rear end of the rotating part (100) is opened and communicated with the connecting hood (3), and the rear end of the rotating part (100) is provided with an embedded part (102) that is rotatably embedded in the smoke inlet (32); The front ends of the connecting plates (31) are bent toward the front of the rotating parts (100) of the first smoke collecting hood (4) and the second smoke collecting hood (5) to form fixed plates (311), and support columns (312) are fixedly provided on the fixed plates (311). The rotating parts (100) of the first smoke collecting hood (4) and the second smoke collecting hood (5) are both fixedly provided with first motors (200), and the rotating shafts of the first motors (200) are connected to the support columns (312); After the first smoke collecting hood (4) and the second smoke collecting hood (5) are matched, a receiving cavity (300) is formed at the matched position, and a cleaning component (6) that can extend into the receiving cavity (300) is provided in the connecting hood (3); The first smoke collecting hood (4) and the second smoke collecting hood (5) both comprise a cover shell (400) having an opening and a filter screen (500) covering the opening; the filter screen (500) of the first smoke collecting hood (4) and / or the second smoke collecting hood (5) is provided with a recessed area (501); the recessed area (501) of the first smoke collecting hood (4) and / or the second smoke collecting hood (5) forms the accommodating cavity (300) after the first smoke collecting hood (4) and the second smoke collecting hood (5) are matched.

2. The range hood according to claim 1, characterized in that: The filter screens (500) of the first smoke collecting hood (4) and the second smoke collecting hood (5) are bent in a step-like manner to form the recessed area (501).

3. The range hood according to claim 1, characterized in that: An installation space (33) independent of the oil smoke passage is arranged in the connection cover (3), and the cleaning component (6) is movably arranged in the installation space (33).

4. The range hood according to claim 3, characterized in that: A driving mechanism (7) for driving the cleaning component (6) to move is also provided in the installation space (33).

5. The range hood according to claim 4, characterized in that: The driving mechanism (7) comprises a second motor (71) and a gear (72) connected to the driving end of the second motor (71); the cleaning component (6) is provided with a rack (73) meshing with the gear (72).

6. The range hood according to claim 1, characterized in that: The cleaning assembly (6) comprises a water tank (61), a heating pipe (63) connected to the water tank (61) via a connecting pipe (62), a fan (64) that can extend into the accommodating chamber (300), and a nozzle (65) arranged at the outlet of the heating pipe (63) and extending into the fan (64).

7. A method for operating a range hood, characterized in that: The range hood is the range hood according to any one of claims 1 to 6; When the range hood is started, the first fume hood (4) and the second fume hood (5) are controlled to open relatively; After the range hood stops working, the first fume collecting hood (4) and the second fume collecting hood (5) are controlled to be relatively closed.

8. A method for operating a range hood, characterized in that: The range hood is the range hood according to any one of claims 1 to 6; When the range hood is in operation, the opening angles of the first smoke collecting hood (4) and the second smoke collecting hood (5) relative to the mating surface are adjusted based on the smoke concentrations on the left and right sides below.

9. A method for operating a range hood, characterized in that: The range hood is the range hood according to any one of claims 1 to 6, and the cleaning component (6) is a steam cleaning device; When the range hood needs to be self-cleaned, the first fume hood (4) and the second fume hood (5) are controlled to be in a relatively closed state; the cleaning component (6) is controlled to move into a receiving cavity (300) formed by the first fume hood (4) and the second fume hood (5) being coupled together, and then the cleaning component (6) is controlled to operate to generate clean water vapor, so that the clean water vapor circulates in a circulation path; The circulation path is a path formed by the first smoke collecting hood (4), the left air duct of the connecting hood (3), the fan hood (1), the right air duct of the connecting hood (3), and the space inside the second smoke collecting hood (5).

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