CN112361412A

CN112361412A - Smoke exhaust ventilator

Info

Publication number: CN112361412A
Application number: CN202011434477.2A
Authority: CN
Inventors: 庞宗莉; 宁菲; 许宁; 于建中; 温汉杰
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-02-12

Abstract

The invention relates to a range hood. The range hood comprises a shell, and a fan, a refrigerating device and an ultrasonic device which are arranged in the shell. The fan comprises a volute and an impeller arranged in the volute, and an air channel is formed between the volute and the impeller. The refrigeration device is used for reducing the temperature in the casing to embrittle oil stains on the volute and the impeller, and the ultrasonic device is used for generating ultrasonic waves to drive the volute and the impeller to crush the embrittled oil stains. Compared with the prior art, the refrigerating device and the ultrasonic device are combined, the cleaning process of the range hood is free of cleaning agent, the cleaning effect is obvious, the environment is protected, a large amount of water is not wasted in the cleaning process, and the cleaning cost is greatly reduced.

Description

Smoke exhaust ventilator

Technical Field

The invention relates to the technical field of kitchen appliances, in particular to a range hood.

Background

The range hood has become the kitchen electrical apparatus that is essential in the culinary art of modern family, and impeller, the spiral case in range hood's the suction system are inside because contact with the oil smoke when using, can adsorb a lot of greasy dirt after using a period, and the time is longer, and the greasy dirt that forms just is difficult to clear up more, if not in time clear up, can seriously influence range hood's performance.

Ultrasonic cleaning technology is increasingly applied to self-cleaning of kitchen appliances. The existing kitchen appliances such as a range hood use aqueous solutions such as cleaning agents as cleaning media when ultrasonic cleaning is carried out, so that a large amount of water is wasted, and the environment is not protected.

Disclosure of Invention

The invention provides a range hood aiming at the problems of environmental pollution and high cleaning cost caused by the fact that a user needs solvents such as a cleaning agent and the like when the existing range hood is used for self-cleaning.

A range hood, comprising:

a housing;

the fan is arranged in the shell and comprises a volute and an impeller arranged in the volute, and an air channel is formed between the volute and the impeller;

the refrigerating device is arranged in the shell and is used for embrittling oil stains on the volute and the impeller; and a process for the preparation of a coating,

and the ultrasonic device is arranged in the shell and used for generating ultrasonic waves to drive the volute and the impeller to vibrate and crush the embrittled oil stains.

In one embodiment, a shell is fixedly connected to the volute, and the shell is provided with a mounting cavity communicated with the air duct;

the ultrasonic device is movably arranged in the mounting cavity and is provided with a first station and a second station in the moving process;

when the ultrasonic device is positioned at the first station, the ultrasonic device is accommodated in the mounting cavity, and when the ultrasonic device is positioned at the second station, at least part of the ultrasonic device penetrates into the air channel and is abutted to the impeller.

In one embodiment, a telescopic push rod is arranged in the shell cover;

the push rod is in transmission connection with the ultrasonic device and used for driving the ultrasonic device to reciprocate between the second station and the first station.

In one embodiment, a telescopic push rod is arranged in the shell cover;

In one embodiment, the housing is located outside the volute, and the volute has a through hole communicating the housing and the air duct.

In one embodiment, the refrigerating device is a semiconductor refrigerating sheet.

In one embodiment, the refrigeration device is fixedly connected to the casing and is arranged opposite to at least one side of the impeller in the axial direction.

In one embodiment, the air conditioner further comprises a temperature sensor, and the temperature sensor is arranged in the air duct.

In one embodiment, the volute has an air outlet communicated with the air duct, and the temperature sensor is fixedly connected to the volute;

the volute is provided with a first side and a second side which are opposite to each other in the horizontal direction perpendicular to the axial direction of the impeller, the air outlet is located on the first side of the volute, and the temperature sensor is arranged on the second side of the volute.

In one embodiment, the lower side of the volute is provided with an oil leakage hole communicated with the air duct.

In one embodiment, the oil leakage device further comprises an oil cup which is configured to collect oil dirt discharged from the oil leakage hole.

In one embodiment, the oil guide device further comprises an oil guide disc arranged in the shell, wherein the oil guide disc is provided with a first end and a second end, the first end of the oil guide disc is fixedly connected to the shell, and the second end of the oil guide disc is positioned below the oil leakage hole;

a diversion hole is formed in the oil guide disc, and the second end of the oil guide disc is positioned above the diversion hole;

the opening of the oil cup is positioned below the flow guide hole.

In one embodiment, the machine shell comprises a shell and a smoke collecting hood connected to one end of the shell, and the fan, the oil guide disc and the ultrasonic device are all arranged in the shell;

the range hood further includes an oil screen communicating the housing and the fume collecting hood, the oil cup further being configured to collect oil dirt discharged from the oil screen.

In one embodiment, the oil screen comprises a screen body and a plurality of convex eaves;

the convex eaves are convexly arranged on the inner wall, close to the shell, of the net body, and each convex eaves is provided with a through hole penetrating through the net body;

the oil cup is positioned below the net body.

In addition, an embodiment of the present invention further provides a control method, which is applied to the range hood provided in any one of the above embodiments, and the control method includes:

responding to a cleaning instruction in a standby state;

controlling the refrigeration device to operate;

after the refrigeration device operates for a first time period, controlling the ultrasonic device to operate for a second time period;

after the ultrasonic device stops, controlling the fan to operate for a third time;

the refrigeration unit is turned off.

When the range hood is in a standby state during actual operation, the cleaning key is started, the refrigerating device is started first and produces cold air, so that the interior of the volute reaches a certain temperature, and when the temperature reaches the embrittlement temperature of grease, oil stains on the volute and the impeller are embrittled. And then, starting the ultrasonic device, wherein the ultrasonic device generates ultrasonic waves to drive the volute and the impeller to vibrate so as to break the embrittled oil stains adhered on the volute and the impeller. At this time, part of the oil stain fragments fall off from the volute and the impeller under the action of gravity, and part of the oil stain fragments are still left on the impeller. And then, controlling the impeller to run at a low rotating speed, and throwing the oil stain fragments on the impeller to the volute. And finally, oil stain fragments falling from the volute and the impeller are discharged out of the fan through the oil leakage hole. Therefore, the range hood has the advantages that no cleaning agent is used in the cleaning process, and the cleaning effect is obvious.

Compared with the prior art, the refrigerating device and the ultrasonic device are combined, so that the range hood is free of cleaning agent in the cleaning process, and the cleaning effect is remarkable. The cleaning agent is environment-friendly, and a large amount of water is not needed to be wasted in the cleaning process, so that the cleaning cost is greatly reduced.

Drawings

Fig. 1 is a schematic structural diagram of a range hood according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the extractor hood shown in fig. 1 from another view angle.

Description of reference numerals:

1-a machine shell; 11-a housing; 12-a smoke collecting hood; 2-a fan; 21-a volute; 22-an impeller; 23-air outlet; 24-oil leakage holes; 3-a refrigeration device; 4-ultrasonic device; 5-a housing cover; 51-a push rod; 6-temperature sensor; 7-oil screen; 71-convex eaves; 72-a via hole; 8-an oil guiding disc; 81-diversion holes; 9-oil cup; 10-check valve.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 and 2, an embodiment of the present invention provides a range hood, which includes a casing 1, and a fan 2, a refrigeration device 3, and an ultrasonic device 4 disposed in the casing 1. The fan 2 includes a volute 21 and an impeller 22 disposed in the volute 21, and an air duct is formed between the volute 21 and the impeller 22. The refrigerating device 3 is used for reducing the temperature in the casing 1 to embrittle oil stains on the volute 21 and the impeller 22, and the ultrasonic device 4 is used for generating ultrasonic waves to drive the volute 21 and the impeller 22 to shatter the embrittled oil stains.

In the above range hood, during actual operation, when the range hood is in a standby state, the cleaning key is activated, the refrigerating device 3 is turned on first and produces cold air, so that the inside of the volute 21 reaches a certain temperature, and when the temperature reaches the grease embrittlement temperature, grease on the volute 21 and the impeller 22 is embrittled. Further, the ultrasonic device 4 is turned on, and the ultrasonic device 4 generates ultrasonic waves to drive the volute 21 and the impeller 22 to vibrate, so as to break up the embrittled oil stains adhered to the volute 21 and the impeller 22. At this time, part of the oil dirt fragments fall off the volute 21 and the impeller 22 under the action of gravity, and part of the oil dirt fragments remain on the impeller 22. Then, the impeller 22 is controlled to operate at a low rotation speed, the oil dirt fragments on the impeller 22 are thrown to the volute casing 21, and finally, the oil dirt fragments falling from the volute casing 21 and the impeller 22 are discharged out of the fan 2 through the oil leakage hole 24. Therefore, the range hood has the advantages that no cleaning agent is used in the cleaning process, and the cleaning effect is obvious.

Compared with the prior art, the refrigerating device 3 and the ultrasonic device 4 are combined, so that the cleaning process of the range hood is free of cleaning agent, the cleaning effect is obvious, the range hood is environment-friendly, a large amount of water is not wasted in the cleaning process, and the cleaning cost is greatly reduced.

It is understood that the scroll casing 21 has oil leakage holes 24 for discharging oil dirt in the air passage.

The ultrasonic device 4 comprises an ultrasonic generator and an ultrasonic transducer which are matched with each other, the ultrasonic generator is electrically connected with the ultrasonic transducer, the ultrasonic generator is used for generating a voltage signal for driving the ultrasonic transducer to work, and the ultrasonic transducer is used for converting the received voltage signal into ultrasonic waves to be emitted. The specific structure of the ultrasonic device 4 can refer to the existing structure, and will not be described in detail here.

The ultrasonic device 4 may be mounted in direct contact with the impeller 22 and the scroll casing 21, or may be mounted in direct contact with the impeller 22 and the scroll casing 21.

In some embodiments, referring to fig. 1, an oil casing 5 is fixedly connected to the volute casing 21, the casing 5 has a mounting cavity communicated with the air duct, the ultrasonic device 4 is movably disposed in the mounting cavity and has a first station and a second station, when the ultrasonic device 4 is located at the first station, the ultrasonic device 4 is accommodated in the mounting cavity, and when the ultrasonic device 4 is located at the second station, the ultrasonic device 4 at least partially penetrates into the air duct and abuts against the impeller 22.

In actual operation, when the ultrasonic device 4 needs to work, the ultrasonic device 4 is driven to the second station to directly contact with the impeller 22, and the impeller 22 and the volute 21 are driven to resonate to crush oil stains on the impeller 22 and the volute 21 after being embrittled by cold air. Thus, the ultrasonic device 4 is in direct contact with the impeller 22, the required frequency is low, the generated noise is relatively low, the effect of crushing the oil stains in a brittle state is better, and the cleaning is more thorough and cleaner.

When the ultrasonic device 4 is not needed to work, the ultrasonic device 4 is driven to the first station, at the moment, the ultrasonic device 4 is contained in the installation cavity, interference between the ultrasonic device 4 and the impeller 22 during movement can be avoided, and oil stains can be prevented from being adhered to the ultrasonic device 4 to damage the performance of the ultrasonic device 4.

It should be noted that a gap is formed between the housing 5 and the impeller 22, so as to prevent the housing 5 and the rotating impeller 22 from interfering with each other and affecting the operation of the fan 2.

It will be appreciated that the ultrasonic device 4 may also be located elsewhere within the housing 1, for example directly fixed to the volute 21.

Specifically, in the embodiment, a telescopic push rod 51 is arranged in the housing 5, and the push rod 51 is in transmission connection with the ultrasonic device 4 and is used for driving the ultrasonic device 4 to reciprocate between the second station and the first station. In operation, the ultrasonic device 4 is driven to approach the impeller 22 when the push rod 51 is extended, and the ultrasonic device 4 is driven to move away from the impeller 22 when the push rod 51 is retracted. Thus, the ultrasonic device 4 is switched between the second station and the first station, and the structure is simple.

Optionally, the push rod 51 is an expansion rod of a telescopic cylinder, or the push rod 51 is connected with the expansion rod of the telescopic cylinder, the push rod 51 is connected with the driving end of a linear motor, and the linear motor drives the push rod 51 to move linearly and expand.

In the embodiment, the housing 5 is located outside the volute casing 21, and the volute casing 21 has a through hole for communicating the housing 5 and the air duct. Therefore, the shell cover 5 is arranged on the outer side of the volute casing 21, the problem that oil smoke is discharged out smoothly due to the fact that the shell cover 5 occupies an air channel when the shell cover 5 is located on the inner side of the volute casing 21 is avoided, and oil stains are further prevented from being adhered to the ultrasonic device 4 in the shell cover 5.

Further, on a cross section of the volute casing 21 perpendicular to the axial direction of the impeller 22, the housing cover 5 is located on the upper left side of the volute casing 21, where the installation space is large, and the ultrasonic device 4 is convenient to install.

In some embodiments, the cooling device 3 is a semiconductor cooling plate. The semiconductor refrigerating plate has the advantages of small and light structure, simple installation and no need of a compressor. The semiconductor refrigerating plate is powered by DC power supply to provide the energy required by electron flow, and after the power supply is turned on, the electron cathode (-) starts to go out, and firstly passes through the P-type semiconductor, the heat absorption amount reaches the N-type semiconductor, and the heat is released, and every time the semiconductor refrigerating plate passes through one NP module, the heat is transmitted to the other side from one side to cause temperature difference to form a cold end and a hot end, so that the refrigeration is realized.

Of course, in other embodiments, the refrigeration device 3 may also include an evaporator, a condenser and a compressor, and the refrigeration is performed by using the air-conditioning refrigeration principle, and the specific configuration is not described herein.

In some embodiments, referring to fig. 2, the refrigeration device 3 is fixed to the casing 1 and is disposed opposite to at least one side of the impeller 22 in the axial direction.

At this time, the shortest distance between the refrigerating device 3 and the impeller 22 is beneficial to realizing the rapid cooling of the air duct and accelerating the embrittlement of oil stains on the impeller 22 and the volute casing 21, thereby accelerating the cleaning process and improving the cleaning efficiency.

Further, the number of the refrigerating devices 3 is two, and the two refrigerating devices 3 are respectively arranged opposite to the two axial sides of the impeller 22 so as to further accelerate the oil stain embrittlement speed.

It should be noted that the casing 1 includes a casing 11 and a fume collecting hood 12 fixed to an inlet end of the casing 11, and fume generated by cooking enters the casing 11 through the fume collecting hood 12 and is discharged to a common flue through an air duct under a negative pressure effect generated in the air duct when the fan 2 operates.

In other embodiments, the refrigeration device 3 may be provided on the inner wall of the hood 12. Meanwhile, an interlayer can be arranged on the inner wall of the fume collecting hood 12, and the refrigerating device 3 is positioned in the interlayer to prevent oil stains from polluting the refrigerating device 3.

In some embodiments, referring to fig. 1 and 2, the range hood further includes a temperature sensor 6, and the temperature sensor 6 is disposed in the air duct.

In actual operation, the temperature sensor 6 detects the temperature in the air duct after the refrigeration unit 3 is turned on. When the temperature in the air duct reaches the catalytic temperature, it is an indication that the oil contamination on the impeller 22 and volute 21 begins to embrittle. The ultrasonic device 4 may be activated at this time to drive the impeller 22 and volute 21 into vibration to break up the embrittled oil.

Thus, the starting time of the ultrasonic device 4 can be accurately controlled through the arrangement of the temperature sensor 6, and meanwhile, the oil stain embrittlement effect is guaranteed.

In specific embodiments, referring to fig. 1, the volute casing 21 has an air outlet communicated with the air duct, the temperature sensor 6 is fixedly connected to the volute casing 21, the volute casing 21 has a first side and a second side opposite to each other in a horizontal direction perpendicular to an axial direction of the impeller 22, the air outlet 23 is located on the first side of the volute casing 21, and the temperature sensor 6 is disposed on a second side of the volute casing 21. So, lay air outlet 23 and temperature sensor 6 in the both sides of spiral case 21, can avoid temperature sensor 6 to the influence that air duct amount of wind and wind pressure produced in air outlet 23 department.

Preferably, the air outlet 23 is located above the first side of the scroll casing 21, and the temperature sensor 6 is disposed in the middle of the second side of the scroll casing 21.

In practical application, the air outlet 23 is located above the right side of the volute casing 21, and the temperature sensor 6 is arranged in the middle of the left side of the volute casing 21.

In this case, the air outlet is provided at the upper side, and the hot air can be raised to accelerate the discharge of the oil smoke. Meanwhile, the temperature sensor 6 is placed at the middle position so that the detected data of the temperature sensor 6 is representative.

In some embodiments, referring to fig. 1 and 2, the lower side of the scroll casing 21 has oil leakage holes 24 communicating with the air passage. Therefore, the oil stain in the air duct can be discharged by utilizing the gravity of the oil stain.

In specific embodiments, referring to fig. 1 and 2, the range hood further includes an oil cup 9 configured to collect oil stains flowing out of the oil leakage hole 24. Therefore, the oil stain can be automatically collected, the cleanness of the cooking bench can be guaranteed, and the oil stain can be prevented from directly dripping on the cooking bench.

Preferably, the oil cup 9 is detachably coupled to the inside of the cabinet 1, so that the user can clean the oil cup 9.

Wherein, the oil cup 9 can be in a drawer type or be connected with the machine shell 1 in a clamping way.

In the specific embodiment, referring to fig. 1 and 2, the range hood further includes an oil guide disc 8, the oil guide disc 8 is disposed in the casing 1, the oil guide disc 8 has a first end and a second end, one end of the oil guide disc 8 is fixedly connected to the casing 1, the second end of the oil guide disc 8 is located below the oil leakage hole 24, the oil guide disc 8 is provided with a flow guide hole 81, the second end of the oil guide disc 8 is located above the flow guide hole 81, and the opening of the oil cup 9 is located below the flow guide hole 81.

In actual use, the oil stains flowing out through the oil leakage holes 24 drop on the second end of the oil guiding pan 8, and since the second end of the oil guiding pan 8 is higher than the flow guiding holes 81, the oil stains dropping on the second end of the oil guiding pan 8 flow to the flow guiding holes 81 under the action of gravity and are collected into the oil cup 9 through the flow guiding holes 81.

Therefore, oil stains falling from the volute 21 and the impeller 22 are guided into the oil cup 9 through the oil guide disc 8, and optimization of the structural layout of the range hood is facilitated.

Further, the first end of the oil guiding plate 8 is located above the guiding hole 81. So, can avoid the greasy dirt to flow to the first end of leading the oil pan 8 and pollute casing 1 to avoid leading the first end of oil pan 8 to take place the oil spilling problem.

In addition, in some embodiments, referring to fig. 1 and 2, the casing 1 includes a housing 11 and a fume collecting hood 12 connected to one end of the housing 11, the fan 2, the oil guide plate 8 and the ultrasonic device 4 are all disposed in the housing 11, the range hood further includes an oil net 7 communicating with the housing 11 and the fume collecting hood 12, and the oil cup 9 is further configured to collect oil dirt discharged from the oil net 7.

In actual operation, the impeller 22 rotates to generate negative pressure in the volute 21, and due to the existence of differential pressure, the oil smoke outside the machine case 1 enters the housing 11 through the smoke collecting hood 12 and the oil net 7, and is discharged to the common flue after passing through the air duct among the impeller 22, the impeller 22 and the volute 21.

Wherein, the oil smoke can be partially condensed on the oil screen 7 when passing through the oil screen 7, and then is discharged into the oil cup 9 through the oil screen 7, thereby reducing the oil stains on the impeller 22 and the volute 21 and reducing the cleaning frequency of the range hood.

In specific embodiments, referring to fig. 2, the oil screen 7 includes a screen body and a plurality of protruding eaves 71, the protruding eaves 71 are protruded on an inner wall of the screen body close to the housing 11, each protruding eaves 71 has a through hole 72 penetrating through the screen body, and the oil cup 9 is located below the screen body.

During the in-service use, the oil smoke gets into in the shell 11 through the hole 72 to when contacting the inner wall of net body, the condensation is on net body, and protruding eaves 71 can block that the greasy dirt of condensation on net body drops outside the casing 1 through hole 72, influences the use, and simultaneously, the greasy dirt through net body condensation flows towards oil cup 9 along net body, until converging oil cup 9.

Further, the net body is in an inverted funnel shape and is positioned in the shell 11. The net body of inverted funnel shape for the main aspects of net body is located the below of tip, and via hole 72 is seted up on the lateral wall of net body, helps improving the smoking efficiency of suction ventilator in unit interval. Moreover, the net body is hidden in the shell 11, so that the range hood has a more attractive structure.

In some embodiments, referring to fig. 2, the range hood further includes a check valve 10, and the check valve 10 is disposed at the air outlet 23 and is used for communicating the air outlet 23 with the outside.

In actual operation, the oil smoke sucked by the impeller 22 is discharged into the public flue through the air duct and the air outlet 23, and the arrangement of the check valve 10 ensures that the oil smoke can only be discharged into the public flue from the air outlet 23 but cannot flow back into the air duct from the public flue.

The check valve 10 may be a commercially available product, and is not limited thereto.

In the range hood provided by the embodiment of the invention, during actual operation, when the range hood is in a standby state, the cleaning key is started, the refrigerating device 3 is started and produces cold air firstly, so that the interior of the volute 21 reaches a certain temperature, and when the temperature reaches the grease embrittlement temperature, grease on the volute 21 and the impeller 22 is embrittled. Further, the ultrasonic device 4 is turned on, and the ultrasonic device 4 generates ultrasonic waves to drive the volute 21 and the impeller 22 to vibrate, so as to break up the embrittled oil stains adhered to the volute 21 and the impeller 22. At this time, part of the oil dirt fragments fall off the volute 21 and the impeller 22 under the action of gravity, and part of the oil dirt fragments remain on the impeller 22. Then, the impeller 22 is controlled to operate at a low rotation speed, and the oil dirt fragments on the impeller 22 are thrown to the volute 21. The oil dirt fragments eventually dropped from the scroll casing 21 and the impeller 22 are discharged out of the fan 2 through the oil leakage hole 24. Therefore, the range hood has the advantages that no cleaning agent is used in the cleaning process, and the cleaning effect is obvious. Compared with the prior art, the refrigerating device 3 and the ultrasonic device 4 are combined, so that the cleaning process of the range hood is free of cleaning agent, the cleaning effect is obvious, the range hood is environment-friendly, a large amount of water is not wasted in the cleaning process, and the cleaning cost is greatly reduced.

In addition, the embodiment of the invention also provides a control method, which is applied to the range hood provided in any one of the embodiments, and the control method comprises the following steps:

s1, responding to the cleaning instruction in the standby state;

s2, controlling the operation of the refrigerating device 3;

s3, controlling the ultrasonic device 4 to operate for a second time period after the refrigeration device 3 operates for the first time period;

s4, after the ultrasonic device 4 stops, controlling the fan 2 to operate for a third time;

s5, turning off the refrigerating device 3.

In step S1, when the range hood is in the non-standby state and the cleaning command is triggered, the range hood determines that the range hood is malfunctioning and does not respond to the cleaning command, so as to avoid affecting the normal operation of the range hood.

In step S3, the first period may be a preset time value, and the temperature inside the cabinet 1 reaches the embrittlement temperature of the grease after the refrigeration apparatus 3 operates for the first period. The temperature sensor 6 can be arranged in the air duct, the temperature in the air duct is detected through the temperature sensor 6, when the temperature reaches the embrittlement temperature of the grease, the refrigerating device 3 operates for a first time period, and the first time period is dynamically set according to the time point of the embrittlement temperature detected by the temperature sensor 6.

In step S4, the second time period is a preset time value. After the ultrasonic device 4 operates for the second time, the brittle oil stains on the volute 21 and the impeller 22 are all vibrated and broken, and the broken oil stain fragments flow to the oil leakage holes 24 along the volute 21 under the action of gravity and are discharged out of the air channel.

In step S4, the rotation speed n1 of the impeller 22 in the fan 2 is in a low rotation speed stage, and it is only necessary to rotate the impeller 22 so that the oil dirt fragments thereon are thrown onto the volute casing 21 for thorough cleaning.

In some embodiments, after step S2 and before step S3 further comprising:

and S21, controlling the fan 2 to operate for a first time.

In actual operation, when the refrigerating device 3 is turned on to produce cold air and the fan 2 is turned on, the circulation and absorption of the cold air are accelerated by the rotation of the impeller 22, so that the temperature in the volute 21 can quickly reach the brittle temperature to accelerate the cleaning process. At this time, the rotational speed n2 of the impeller 22 is greater than the rotational speed n 1.

In some embodiments, step S3 includes:

s31, after the device to be controlled operates for a first time, driving the ultrasonic device 4 to move to a second station and abut against the impeller 22;

and S32, controlling the ultrasonic device 4 to operate for a second time period.

At this moment, when the second station, ultrasonic device 4 and impeller 22 direct contact to drive impeller 22 and spiral case 21 to resonate together, be favorable to improving impeller 22 oil dirt fragile piece's fragmentation effect, guarantee impeller 22's clean effect, help guaranteeing range hood's performance.

Accordingly, step S4 includes:

s41, after the ultrasonic device 4 stops, driving the ultrasonic device 4 to move to a first station;

and S42, controlling the fan 2 to operate for a third time.

At the moment, when the first station is used, the ultrasonic device 4 is separated from the impeller 22, the impeller 22 is prevented from interfering with the ultrasonic device 4 when rotating, and the phenomenon that oil stains are attached to the ultrasonic device 4 to influence the performance of the ultrasonic device 4 when a cigarette machine is used is also avoided.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A range hood, comprising:

a housing (1);

the fan (2) is arranged in the shell (1) and comprises a volute (21) and an impeller (22) arranged in the volute (21), and an air channel is formed between the volute (21) and the impeller (22);

the refrigerating device (3) is arranged in the shell (1) and is used for embrittling oil stains on the volute (21) and the impeller (22); and a process for the preparation of a coating,

and the ultrasonic device (4) is arranged in the shell (1) and is used for generating ultrasonic waves to drive the volute (21) and the impeller (22) to crush the embrittled oil stains.

2. The range hood according to claim 1, wherein a housing (5) is fixedly connected to the volute (21), and the housing (5) has a mounting cavity communicated with the air duct;

the ultrasonic device (4) is movably arranged in the mounting cavity and is provided with a first station and a second station in the moving process;

when the ultrasonic device (4) is positioned at the first station, the ultrasonic device is accommodated in the installation cavity; when the ultrasonic device (4) is positioned at the second station, at least part of the ultrasonic device penetrates into the air channel and is abutted against the impeller (22).

3. The range hood according to claim 2, wherein a telescopic push rod (51) is arranged in the housing (5);

the push rod (51) is in transmission connection with the ultrasonic device (4) and is used for driving the ultrasonic device (4) to reciprocate between the second station and the first station.

4. The range hood according to claim 2, wherein the housing (5) is located outside the volute (21), and the volute (21) has a through hole communicating the housing (5) and the air duct.

5. The range hood according to any one of claims 1 to 4, wherein the refrigerating device (3) is a semiconductor refrigerating sheet.

6. The range hood according to any one of claims 1 to 4, wherein the refrigeration device (3) is fixedly connected to the casing (1) and is arranged corresponding to at least one side of the impeller (22) in the axial direction.

7. The range hood according to any one of claims 1 to 4, further comprising a temperature sensor (6), wherein the temperature sensor (6) is disposed in the air duct.

8. The range hood according to claim 7, wherein the volute (21) has an air outlet (23) communicated with the air duct, and the temperature sensor (6) is fixedly connected to the volute (21);

the volute is provided with a first side and a second side which are opposite to each other along a horizontal direction perpendicular to the axial direction of the impeller (22), the air outlet (23) is located on the first side of the volute (21), and the temperature sensor (6) is arranged on the second side of the volute (21).

9. The range hood according to any one of claims 1 to 4, wherein the lower side of the volute (21) is provided with an oil leakage hole (24) communicated with the air duct.

10. The range hood according to claim 9, further comprising an oil cup (9) configured to collect oil dirt discharged from the oil leakage hole (24).

11. The range hood according to claim 10, further comprising an oil guiding pan (8) disposed in the housing (1), wherein the oil guiding pan (8) has a first end and a second end, the first end of the oil guiding pan (8) is fixedly connected to the housing (1), and the second end of the oil guiding pan (8) is located below the oil leakage hole (24);

a diversion hole (81) is formed in the oil guide disc (8), and the second end of the oil guide disc (8) is positioned above the diversion hole (81);

the opening of the oil cup (9) is positioned below the diversion hole (81).

12. The range hood according to claim 11, wherein the cabinet (1) comprises a housing (11) and a fume collecting hood (12) connected to one end of the housing (11), and the fan (2), the oil guide plate (8) and the ultrasonic device (4) are all arranged in the housing (11);

the range hood further comprises an oil screen (7) communicating the housing (11) and the fume collecting hood (12), and the oil cup (9) is further configured to collect oil dirt discharged from the oil screen (7).

13. The range hood according to claim 12, wherein the oil screen (7) comprises a screen body and a plurality of eaves (71);

the convex eaves (71) are convexly arranged on one side, close to the shell (11), of the net body, and each convex eaves (71) is provided with a through hole (72) penetrating through the net body;

the oil cup (9) is positioned below the net body.

14. A control method applied to the range hood according to any one of claims 1 to 13, wherein the control method comprises the following steps:

responding to a cleaning instruction in a standby state;

controlling the refrigeration device (3) to operate;

after the refrigeration device (3) operates for a first time period, controlling the ultrasonic device (4) to operate for a second time period;

after the ultrasonic device (4) stops, controlling the fan (2) to operate for a third time;

-switching off the refrigeration device (3).