CN110617536A

CN110617536A - Kitchen appliance

Info

Publication number: CN110617536A
Application number: CN201910912836.1A
Authority: CN
Inventors: 刘玉磊; 陈寅之; 程刚
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2019-12-27
Anticipated expiration: 2039-09-25
Also published as: CN110617536B

Abstract

The invention discloses a kitchen appliance. Kitchen appliance is including the oil smoke wind channel and the oil smoke determine module that have the fan, oil smoke determine module establishes on the oil smoke wind channel, oil smoke determine module includes light emitting device and the light receiving device that sets up along kitchen appliance's oil smoke wind channel's circumference interval, light emitting device's quantity is a plurality of, light receiving device's quantity is single, light emitting device is used for to oil smoke wind channel emission light, light receiving device is used for receiving the light of light emitting device transmission and according to the light output signal of telecommunication that receives, kitchen appliance is used for according to signal of telecommunication control kitchen appliance. In the kitchen appliance, under the condition that the oil smoke particles in the oil smoke air channel are not uniformly distributed, the kitchen appliance of the embodiment can accurately detect the concentration of the oil smoke particles and the size and distribution of the oil smoke particles, and further can provide proper air volume of the fan to absorb the oil smoke particles.

Description

Kitchen appliance

Technical Field

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

Background

In the related art, the range hood may employ an infrared sensor to detect the concentration of soot particles to control the amount of air of the blower. However, the range hood in the prior art can only detect the concentration of the oil smoke particles at a specific position of the oil smoke air duct and the oil smoke particles with a specific size, and when the oil smoke particles in the oil smoke air duct are distributed unevenly, the infrared sensor may not detect the oil smoke particles or the detected concentration of the oil smoke particles is higher, which easily causes misjudgment.

Disclosure of Invention

The embodiment of the invention provides a kitchen appliance.

The kitchen appliance comprises an oil smoke air duct with a fan and an oil smoke detection assembly, wherein the oil smoke detection assembly is arranged on the oil smoke air duct and comprises a plurality of light emitting devices and a plurality of light receiving devices which are arranged at intervals along the circumferential direction of the oil smoke air duct of the kitchen appliance, the number of the light emitting devices is one, the light emitting devices are used for emitting light to the oil smoke air duct, the light receiving devices are used for receiving the light emitted by the light emitting devices and outputting electric signals according to the received light, and the kitchen appliance is used for controlling the kitchen appliance according to the electric signals.

In the kitchen appliance provided by the embodiment of the invention, the light emitting devices and the light receiving devices are arranged in the oil smoke air channel, the number of the light emitting devices is multiple, the number of the light receiving devices is single, the light emitting devices can emit light rays to the oil smoke air channel, and the light receiving devices can receive the light rays emitted by the light emitting devices and output electric signals according to the received light rays, so that under the condition that the oil smoke particles in the oil smoke air channel are not uniformly distributed, the kitchen appliance provided by the embodiment of the invention can accurately detect the concentration of the oil smoke particles and the size and distribution of the oil smoke particles, and further can provide proper air volume of a fan to absorb the oil smoke particles.

In some embodiments, the central axis of each of the light emitting devices and the central axis of the light receiving device intersect with the central axis of the end of the lampblack air duct, and the intersection angles formed by the intersection of the central axis of each of the light emitting devices and the central axis of the light receiving device are different, and the range of the included angles is (0 degrees and 180 degrees). Thus, the installation of the light emitting device and the light receiving device is realized, and the size and the distribution state of the soot particles can be detected through the light emitting device and the light receiving device.

In some embodiments, the central axis of each of the light emitting devices and the central axis of the light receiving device intersect with the central axis of the end of the lampblack air channel, and the central axis of each of the light emitting devices and the central axis of the light receiving device intersect to form the same included angle, and the included angle ranges from (0 ° to (180 °). Thus, the installation of the light emitting device and the light receiving device is realized, and the size and the distribution state of the soot particles can be detected through the light emitting device and the light receiving device.

In some embodiments, the central axis of each of the light emitting devices and the central axis of the light receiving device intersect with the central axis of the end of the lampblack air channel, and the intersection angles formed by the intersection of the central axis of each of the light emitting devices and the central axis of the light receiving device are partially the same and partially different, and the included angles range from (0 ° to 180 °). Thus, the installation of the light emitting device and the light receiving device is realized, and the size and the distribution state of the soot particles can be detected through the light emitting device and the light receiving device.

In some embodiments, the kitchen appliance is configured to control the plurality of light emitting devices to be turned on at a preset timing for a preset time period, and the light receiving device is configured to receive the light emitted by the light emitting devices at a time interval. So, the control of oil smoke determine module is comparatively simple, also can increase oil smoke determine module's sensitivity.

In some embodiments, the kitchen appliance is configured to determine a distribution characteristic of a size of soot particles based on the electrical signals output by the plurality of light receiving devices. Thus, the distribution characteristics of the sizes of the oil smoke particles can be accurately and simply measured.

In some embodiments, the kitchen appliance is used for determining a cooking habit according to the distribution characteristics of the size of the lampblack particles, carrying out cleaning reminding according to the cooking habit, and pushing a cooking guide to a preset terminal according to the cooking habit. So, kitchen appliance can provide the amount of wind of more suitable fan and remind the user to wash kitchen appliance according to definite culinary art custom, brings good experience for the user.

In some embodiments, the kitchen appliance is used for determining a cooking habit according to the distribution characteristics of the size of the lampblack particles, and is used for carrying out cleaning reminding according to the cooking habit, or pushing a cooking guide to a preset terminal according to the cooking habit. So, kitchen appliance can provide the amount of wind of more suitable fan or remind the user to wash kitchen appliance according to definite culinary art custom, brings good experience for the user.

In some embodiments, the light emitting device includes a first sealing plug mounted on the first circuit board, an emitting portion formed with a first inner cavity, and a first circuit board on which the emitting portion is located; and the light receiving device comprises a second sealing plug, a receiving part and a second circuit board, the second sealing plug is installed on the second circuit board, a second inner cavity is formed in the second sealing plug, and the receiving part is located in the second inner cavity and arranged on the second circuit board. So, emission portion and receiving portion all are located the intracavity, can reduce the adverse effect of oil smoke granule to emission portion and receiving portion, have prolonged the life of emission portion and receiving portion.

In some embodiments, the light emitting device includes a first sealing plug mounted on the first circuit board, an emitting portion formed with a first inner cavity, and a first circuit board on which the emitting portion is located; or the light receiving device comprises a second sealing plug, a receiving part and a second circuit board, the second sealing plug is installed on the second circuit board, a second inner cavity is formed in the second sealing plug, and the receiving part is located in the second inner cavity and arranged on the second circuit board. Therefore, the transmitting part or the receiving part is positioned in the inner cavity, the adverse effect of the oil smoke particles on the transmitting part or the receiving part can be reduced, and the service life of the transmitting part or the receiving part is prolonged.

In some embodiments, one end of the first inner cavity is formed with a first paraboloid, and the emitting part is located at the focus position of the first paraboloid; and a second paraboloid is formed at one end of the second inner cavity, and the receiving part is positioned at the focal point of the second paraboloid. Thus, the efficiency of the transmitting portion for transmitting light and the receiving portion for receiving light can be improved.

In some embodiments, one end of the first inner cavity is formed with a first paraboloid, and the emitting part is located at the focus position of the first paraboloid; or a second paraboloid is formed at one end of the second inner cavity, and the receiving part is positioned at the focal point of the second paraboloid. Thus, the efficiency of the transmitting part for transmitting light or the receiving part for receiving light can be improved.

In some embodiments, the light emitting device includes a first lens disposed in the first inner cavity and located on a light emitting path of the emitting portion, and the first lens is configured to emit light emitted from the emitting portion in parallel; and the light receiving device comprises a second lens, the second lens is arranged in the second inner cavity and positioned on the receiving light path of the receiving part, and the second lens is used for converging the light entering from the second inner cavity to the receiving part. Thus, the efficiency of the transmitting portion for transmitting light and the receiving portion for receiving light can be improved.

In some embodiments, the light emitting device includes a first lens disposed in the first inner cavity and located on a light emitting path of the emitting portion, and the first lens is configured to emit light emitted from the emitting portion in parallel; or the light receiving device comprises a second lens, the second lens is arranged in the second inner cavity and positioned on the receiving light path of the receiving part, and the second lens is used for converging the light entering from the second inner cavity to the receiving part. Thus, the efficiency of the transmitting part for transmitting light or the receiving part for receiving light can be improved.

In some embodiments, a first shielding part located at the front end of the emitting part is arranged on the inner wall of the first inner cavity; and a second shielding part positioned at the front end of the receiving part is arranged on the inner wall of the second inner cavity. Thus, the adverse effect of the oil smoke particles on the transmitting part and the receiving part is further reduced, and the service lives of the transmitting part and the receiving part are prolonged

In some embodiments, a first shielding part located at the front end of the emitting part is arranged on the inner wall of the first inner cavity; or a second shielding part positioned at the front end of the receiving part is arranged on the inner wall of the second inner cavity. Therefore, the adverse effect of the oil fume particles on the transmitting part or the receiving part is further reduced, and the service life of the transmitting part or the receiving part is prolonged

In some embodiments, the inner wall of the first inner cavity is provided with a first oil guide groove connected with the first shielding part; and a second oil guide groove connected with the second shielding part is formed in the inner wall of the second inner cavity. Therefore, the condensed materials in the inner cavity can flow away smoothly through the oil guide groove, and the service life of the transmitting part and the service life of the receiving part are prevented from being influenced by the accumulation of the condensed materials.

In some embodiments, the inner wall of the first inner cavity is provided with a first oil guide groove connected with the first shielding part; or the inner wall of the second inner cavity is provided with a second oil guide groove connected with the second shielding part. Therefore, the condensed materials in the inner cavity can flow away smoothly through the oil guide groove, and the phenomenon that the accumulation of the condensed materials affects the service life of the transmitting part or the receiving part is avoided.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a kitchen appliance according to an embodiment of the present invention.

Fig. 2 is another schematic structural diagram of the kitchen appliance according to the embodiment of the present invention.

Fig. 3 is a further schematic structural diagram of the kitchen appliance according to the embodiment of the present invention.

Fig. 4 is a schematic structural view of a check valve assembly of a kitchen appliance according to an embodiment of the present invention.

Fig. 5 is a plan sectional view of the check valve assembly of fig. 4 taken along the direction L-L.

Fig. 6 is an enlarged view of a portion I of fig. 5.

Fig. 7 is an enlarged view of a portion II of fig. 5.

Fig. 8 is a schematic structural diagram of a smoke detection assembly according to an embodiment of the present invention.

Fig. 9 is a graph of drive current versus time for a kitchen appliance in accordance with an embodiment of the present invention.

Fig. 10 is a graph showing the relationship between the angle between the light emitting device and the light receiving device and the intensity of light received by the light receiving device in the case of light oil smoke cooking.

Fig. 11 is a graph showing the relationship between the angle between the light emitting device and the light receiving device and the intensity of light received by the light receiving device in the case of heavy oil smoke cooking.

Fig. 12 is a schematic view of the structure of the first sealing plug of the embodiment of the present invention.

Description of the main element symbols:

the kitchen appliance 100, the deflector assembly 10, the touch button 12, the box 20, the top 22, the lampblack duct end 210, the fan assembly 30, the volute 32, the fan 34, the check valve assembly 410, the check valve 40, the first through hole 401, the second through hole 402, the lampblack detection assembly 50, the light emitting device 52, the first fixing portion 521, the emitting portion 522, the first convex ring 524, the emitting opening 5282, the drain hole 529, the light receiving device 54, the second fixing portion 541, the receiving portion 542, the second convex ring 544, the receiving opening 5484, the positioning pin 561, the first sealing plug 562, the first inner cavity 5622, the second sealing plug 564, the second inner cavity 5642, the first shielding portion 510, the first oil baffle ring 506, the second shielding portion 520, the second oil baffle ring 508, the first oil guide groove 507, the second oil guide groove 509, the first light guide hole 5652, the second light guide hole 5654, the first paraboloid 5672, the second paraboloid 5674, the first circuit board 551, the second circuit board 552, the second circuit board, A first lens 57, a second lens 58, a wire protection structure 60, a protection box 70, a junction box 80, a wiring port 82, and a housing 84.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. The same or similar reference numbers in the drawings identify the same or similar elements or elements having the same or similar functionality throughout.

In addition, the embodiments of the present invention described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the embodiments of the present invention, and are not to be construed as limiting the present invention.

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.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a kitchen appliance 100 according to an embodiment of the present invention, and in the example of fig. 1, the kitchen appliance 100 is an upper-row kitchen appliance 100. It is understood that in other embodiments, the kitchen appliance 100 may be a bottom-up kitchen appliance 100, a side-up kitchen appliance 100, or the like, and is not limited thereto. The kitchen appliance 100 is described in detail below as an example of the kitchen appliance 100 of the top-up type. Specifically, the kitchen appliance 100 includes, but is not limited to, a range hood, an integrated range, and the like having a smoke exhaust function. In the illustrated embodiment, the kitchen appliance 100 will be described by taking a hood as an example. The range hood is a variable frequency range hood.

The kitchen appliance 100 according to the embodiment of the invention includes a baffle assembly 10, a box 20 and a check valve assembly 410, wherein the check valve assembly 410 includes a check valve 40, the box 20 is disposed on the baffle assembly 10, the baffle assembly 10 includes a touch key 12, after the touch key 12 is triggered, the kitchen appliance 100 is turned on, and the soot particles 110 can enter the box 20 from the baffle assembly 10. A fan assembly 30 is disposed within the housing 20, the fan assembly 30 including a volute 32 and a fan 34 disposed within the volute 32. The soot particles 110 enter the volute 32 by the centrifugal force of the impeller of the fan 34, and the soot particles 110 can be discharged from the air outlet channel of the volute 32. The check valve 40 is connected to the case 20 and to an outlet of the outlet duct of the scroll casing 32. The soot particles 110 can be discharged from the outlet of the volute 32 through the check valve 40 and into the smoke tube or flue.

It is understood that the check valve 40 is a valve in which the opening and closing member is a circular flap and operates by its own weight and pressure of the medium to block the reverse flow of the medium. The check valve 40 may be a lift check valve and a swing check valve. In the present embodiment, the soot particles 110 enter the check valve 40 after being discharged from the outlet of the air outlet passage of the scroll casing 32, and the valve of the check valve 40 is opened when the pressure of the inlet of the check valve 40 is greater than the sum of the weight of the flap of the check valve 40 and the rotational resistance thereof. The valve of the check valve 40 is closed when the soot particles 110 flow backward.

Referring to fig. 1, a kitchen appliance 100 according to an embodiment of the present invention includes a smoke detecting assembly 50, in the example of fig. 3, the smoke detecting assembly 50 is disposed on a smoke duct having a fan 34, and the smoke duct may include an air outlet 321 of a volute 32 and a smoke duct 41 of a check valve 40. In one embodiment, the smoke detecting assembly 50 may be disposed at the air outlet 321 of the volute 32, specifically, the smoke detecting assembly 50 is disposed at the smoke outlet 41 of the check valve 40, and specifically, the smoke detecting assembly 50 may be disposed at the inner wall or the outer wall of the smoke outlet 41 of the check valve 40. In the embodiment of the present invention, the smoke detecting unit 50 is provided on the outer wall of the smoke passage 41 of the check valve 40.

Specifically, in the illustrated embodiment, the check valve 40 is attached to the top 22 of the tank 20. In other embodiments, the check valve 40 may be attached at other locations on the tank 20.

Specifically, the smoke detecting element 50 may be an infrared detecting element or a laser detecting element, and the like, which is not limited herein. The following embodiments are described in detail with the lampblack detection component 50 as an infrared detection component.

The smoke detection assembly 50 includes a light emitting device 52 and a light receiving device 54 disposed at intervals along a circumferential direction of a smoke duct of the kitchen appliance 100. In this embodiment, the light emitting device 52 can be used to emit light to the cooking fume duct. In the example of fig. 3, the light emitting device 52 is used for emitting light to the cooking fume duct of the check valve 40, and the light receiving device 54 is used for receiving the light emitted by the light emitting device 52 and outputting an electrical signal according to the received light. Typically, the soot particles 110 span a particle size of 100nm to 10 um. In one embodiment, when the soot particles 110 pass through the optical path of the infrared light emitted from the light emitting device 52, the soot particles 110 can block, scatter and diffract the infrared light, that is, the soot particles 110 in the check valve 40 can affect the intensity of the light emitted from the light emitting device 52 received by the light receiving device 54, so that the electrical signal output by the light receiving device 54 changes, the kitchen appliance 100 can control the operation of the fan 34 according to the electrical signal, so that the fan 34 can provide a proper amount of air to absorb the soot particles 110, and the effect of absorbing the soot particles 110 is good and the accuracy is high. In addition, the light receiving device 54 is disposed at an orientation on a side of the volute outlet biased, for example, the left side as viewed in fig. 3. Specifically, controlling the operation of the fan 34 may be understood as controlling the air volume of the fan 34, and the air volume of the fan 34 is related to the rotational speed of the fan 34. In one example, the corresponding relationship between the oil smoke concentration and the air volume of the fan can be established by simulating the actual use scene of the kitchen appliance 100, and the oil smoke concentration can be calibrated by the electrical signal output by the light receiving device 54. The corresponding air quantity is achieved through the rotating speed of the fan 34, and the oil smoke absorption effect can be improved.

Referring to fig. 4, in the example of fig. 4, the kitchen appliance 100 further includes a fixing portion disposed at an outer wall of the check valve 40 and spaced apart from each other, and the light emitting device 52 and the light receiving device 54 are mounted at the fixing portion with a space therebetween. Specifically, the fixing portion includes a first fixing portion 521 and a second fixing portion 541 spaced apart, the light emitting device 52 is mounted on the first fixing portion 521, and the light receiving device 54 is mounted on the second fixing portion 541.

In the illustrated embodiment, the fixing portions are integrated with the check valve 40, that is, the first and second fixing portions 521 and 541 are integrated with the check valve 40. In this way, the manufacture of the fixing portion and the check valve 40 can be made simple.

In another embodiment, the fixing portion and the check valve 40 are separate structures, that is, the first fixing portion 521 and the second fixing portion 541 are separate structures from the check valve 40. Like this, can make oil smoke detection assembly 50 can use on the check valve 40 of different kinds like this, borrow original oil smoke detection assembly 50 and other parts, can reduce check valve 40's transformation cost and raise the efficiency. Specifically, the first and second fixing portions 521 and 541 may be connected with the check valve 40 by means of screws or a snap or an adhesive.

It should be noted that the first fixing portion 521 and the second fixing portion 541 may be provided as an integral structure or a separate structure according to actual requirements of the kitchen appliance 100, and are not limited in detail herein.

In the example of fig. 1 and 4, the kitchen appliance 100 includes a grommet structure 60 provided on an outer wall of the check valve 40, and the smoke detecting assembly 50 includes wires (not shown) connecting the light emitting device 52 and the light receiving device 54, and a part of the wires are received in the grommet structure 60. Thus, the wire protection structure 60 can protect the wire, and the service life of the oil smoke detection assembly 50 is prolonged.

Specifically, the wire guard structure 60 connects the first fixing portion 521 and the second fixing portion 541, and the wire can be used for power supply and transmission of data, instructions, and the like. The wires include a first wire connected to the light emitting device 52 and a second wire connected to the light receiving device 54. The wire protection structure 60 includes a wire protection cavity 62 and a wire protection cover 61, wherein a part of the first wire and a part of the second wire are accommodated in a wire protection groove formed in the wire protection cavity 62, and the wire protection cover 61 covers the wire protection groove to form a relatively closed space. The two ends of the wire cover 61 can be connected to the first fixing portion 521 and the second fixing portion 541 by means of fastening, screwing, or the like. In addition, a plurality of wires can form a wire bundle, so that the wires are convenient to arrange.

In one embodiment, the first fixing portion 521, the second fixing portion 541 and the wire protection cavity 62 are integrated with the check valve 40.

In another embodiment, the first fixing portion 521, the second fixing portion 541 and the wire protection cavity 62 are separate structures. Specifically, the wire guard structure 60 may be connected to the first fixing portion 521 and the second fixing portion 541 to form an integral part, and the integral part may be connected to the check valve 40 by a screw or a snap or an adhesive.

In the example of fig. 1, 2, 4 and 5, the kitchen appliance 100 further includes a protection box 70 and a junction box 80, the protection box 70 and the junction box 80 are mounted on the cabinet 20, the protection box 70 connects the check valve 40 and the junction box 80, the protection box 70 houses a wire between the wire protection structure 60 and the junction box 80, and the wire is connected to the junction box 80.

Specifically, the protection box 70 and the junction box 80 are installed on the top 22 of the box 20, the material of the junction box 80 may be metal or plastic, and the material of the protection box 70 may be plastic. Referring to fig. 2, the terminal block 80 includes a connection port 82 and a housing 84, and wires are connected into the housing 84 through the connection port 82. The junction box 80 also includes an electrical control board (not shown) disposed within the housing 84. The electric control board comprises a controller (such as an MCU (microprogrammed control unit), a transformer and other electric parts, an electric signal output by the oil smoke detection assembly 50 can be transmitted to the controller through a wire, and the controller can analyze the concentration and distribution characteristics of the oil smoke particles 110 according to the electric signal and control the air volume of the kitchen appliance 100 according to the concentration and distribution characteristics of the oil smoke particles 110. The transformer is used to supply power to various electric devices including the smoke detection assembly 50.

Generally, according to the requirements of safety regulations, the wires exposed outside need to be able to withstand at least 100N of tensile force tests, so the wires of the smoke detection assembly 50 need to be protected by the wire protection structure 60, the protection box 70, and the like. The packaging scheme of the kitchen electrical appliance product is that a check valve component (comprising a check valve 40 and various parts and components which are arranged on the check valve 40 and comprise a lampblack detection component 50) is separated from a box body 20 for packaging, and is installed by an after-sale door, and in order to reduce the after-sale workload, a quick-release structure of the check valve component and a wire box 80 is required to be designed.

Specifically, the check valve assembly is fixed on the top of the housing 20, and the wire connecting the light emitting device 52 and the light receiving device 54 can be covered for protection after the wire protecting structure 60 is fixed by a snap or a screw. After the check valve assembly and junction box 80 are connected by a quick-connect plug by an after-market person or other person, the excess length of wire bundle is gathered into protective case 70 and then the check valve assembly is connected to the top of box 20 (e.g., the top plate of box 20) by screws or the like.

In an embodiment of the present invention, referring to fig. 4 and 5, fig. 5 is a sectional view of the check valve assembly of fig. 4 taken along the line L-L, and the view of the sectional view shown in fig. 5 is a plan sectional view. The light emitting device 52 and the light emitting device 52 each include a sealing plug and a circuit board. Referring to fig. 6 and 7, the sealing plug of the light emitting device 52 is a first sealing plug 562. The sealing plug of the light receiving device 54 is a second sealing plug 564, the circuit board of the light emitting device 52 is a first circuit board 551, and the circuit board of the light receiving device 54 is a second circuit board 552. The first sealing plug 562 is mounted on the first circuit board 551 and the second sealing plug 564 is mounted on the second circuit board 552. The light emitting device 52 further includes an emitting portion 522, and the first sealing plug 562 is formed with a first inner cavity 5622, and the emitting portion 522 is located in the first inner cavity 5622 and disposed on the first circuit board 551. The light receiving device 54 further includes a receiving portion 542, the second sealing plug 564 is formed with a second inner cavity 5642, and the receiving portion 542 is located in the second inner cavity 5642 and disposed on the second circuit board 552.

The first sealing plug 562 forms a first interior cavity 5622 that is open at one end when mated and compressed with the first circuit board 551. The second bore seal 564 forms a second interior cavity 5642 that is open at one end when mated and pressed against the second circuit board 552. The sealing plug can be made of soft materials such as rubber or silica gel. In one example, the ratio of the depth of the cavity to the pore size is greater than or equal to 6, and the diffusion rate of soot particles 110 into the pores can be controlled to be less than 1%.

Referring to fig. 5, 6 and 7, the check valve 40 is provided with a first through hole 401, and the first sealing plug 562 is partially disposed in the first through hole 401. The check valve 40 defines a second through-hole 402 and a second sealing plug 564 is partially disposed within the second through-hole 402.

Referring to fig. 6 and 7, the check valve 40 further includes a first protrusion ring 524 protruding on the inner wall of the first through hole 401. The first protruding ring 524 can block the soot particles 110 from entering the first inner cavity 5622, and the first protruding ring 424 is provided with an emission opening 5282 for light to exit. The check valve 40 includes a second male ring 544 protruding from the inner wall of the second through-hole 402. The second collar 544 is formed with a receiving opening 5482 to facilitate light entering. The second raised ring 544 may act to shield the soot particles 110 from entering the second interior cavity 5642.

The emitting portion 522 includes an infrared emitting tube. The receiving unit 542 includes an infrared receiving tube. The emitting portion 522 may emit infrared light, and the receiving portion 542 may receive the infrared light emitted from the emitting portion 522, and output a corresponding electrical signal according to the received infrared light, and the corresponding electrical signal may be transmitted to the controller of the electronic control board through the second circuit board 552.

In the example of fig. 6, a first shielding portion 510 is provided on an inner wall of the first inner cavity 5622 at a front end of the emitting portion 522. Specifically, the first shielding portion 510 is formed with a first slinger 510, and the first slinger 510 is annularly provided convexly on the inner wall of the first inner cavity 5622. The number of the first slinger 506 is plural, and the plural first slingers 506 are arranged along the length direction of the first sealing plug. In the example of fig. 7, a second shielding portion 520 is provided on an inner wall of the second inner cavity 5642 at a front end of the receiving portion 542. Specifically, the second shielding portion 520 is formed with a second oil slinger 508, and the second oil slinger 508 is annularly provided convexly on the inner wall of the second inner cavity 5642. The number of the second oil slinger 508 is plural, and plural second oil slingers 508 are arranged along the length direction of the second sealing plug.

When the soot particles enter the first inner cavity 5622 due to the air fluctuation, the soot particles 110 are shielded by the first shielding portion 510 adsorbed on the first inner cavity 5622 to reduce the pollution to the emission portion 522. With respect to the first oil slinger 508, the grooves of the first oil slinger 506 absorb air fluctuation, and the soot particles 110 are further intercepted by the first oil slinger 506, so that the first oil slinger 506 can further improve the shielding effect on the soot particles 110, and further prevent the soot particles 110 from polluting the emission part 522 and affecting the service life of the emission part 522.

When the soot particles 110 enter the second inner cavity 5642 due to air fluctuation, the soot particles 110 are shielded by the second shielding portion 520 adsorbed on the second inner cavity 5642 to reduce the pollution to the receiving portion 542. With respect to the second oil control ring 508, the grooves of the second oil control ring 508 absorb air fluctuation, and the soot particles 110 are further intercepted by the second oil control ring 508, so that the second oil control ring 508 can further improve the shielding effect on the soot particles 110, and further prevent the soot particles from polluting the receiving portion 542 and affecting the service life of the receiving portion 542.

It should be noted that, in other embodiments, the first blocking portion 510 may include other blocking structures, such as protrusions, ribs, recesses, etc. on the inner wall of the first inner cavity 5622, that is, the first blocking portion 510 is disposed to increase the inner wall area of the first inner cavity 5622, so as to increase the probability of the soot particles being attached. The second shielding portion 520 can include other shielding structures, such as protrusions, ribs, recesses, etc. on the inner wall of the second inner cavity 5642, that is, the second shielding portion 520 can increase the inner wall area of the second inner cavity 5642, thereby increasing the probability of the soot particles being attached.

In the example of fig. 6, 7, and 12, a first oil guide groove 507 is formed in an inner wall of the first inner cavity 5622, and the first oil guide groove 507 is connected to the first shielding portion 510. When the soot particles 110 enter the first inner cavity 5622 due to air fluctuation, the soot particles 110 are adsorbed on the inner wall of the first inner cavity 5622 to form condensate, and the condensate can flow out through the first oil guiding groove 507 at the bottom of the first sealing plug 562. The first oil guiding groove 507 is a long hole with a circular or square cross section, and preferably, the opening of the first oil guiding groove 507 is lower than the inside of the first inner cavity 5622, that is, the first oil guiding groove 507 is inclined downwards in a direction away from the launching part 522, so as to facilitate the liquid to flow out. The first oil guiding groove 507 may also be opened in parallel with the first inner cavity 5622 to allow the liquid to flow out. The side length or diameter of the first oil guiding groove 507 is greater than or equal to 2.5mm (preferably, greater than or equal to 3mm) to overcome the internal tension of the liquid and facilitate the liquid flowing out.

In one example, the first sealing plug 562 is cylindrical, the outer diameter of the first sealing plug 562 is 20-25 mm, the inner diameter of the first sealing plug 562 is 5-10 mm, the depth of the first oil deflector ring 506 is 5-10 mm, the depth of the first oil guide groove 507 is 3-5 mm, the first oil deflector ring 506 is annular, the number of the first oil deflector rings 506 is multiple, the multiple first oil deflector rings 506 are sequentially arranged along the length direction of the first sealing plug 562, and the depth of gaps between every two adjacent first oil deflector rings 506 is the same. It should be noted that the values and value ranges mentioned in the above examples and embodiments are for the purpose of illustrating the implementation of the present invention, and should not be construed as limiting the present invention, and the values and value ranges can be adjusted according to actual design parameters. The numerical values and numerical ranges set forth elsewhere herein are to be understood in light of the teachings herein. In other examples, the first sealing plug 562 may have a regular or irregular nominal shape such as a rectangular parallelepiped, a square cube, etc., and is not limited herein.

In the example of fig. 6 and 7, the first and second collars 524 and 544 are each opened with a drain hole 529, the drain hole 529 is communicated with the corresponding oil guide groove, and the dirt flowing into the oil guide groove can be discharged from the drain hole 529 to the first and second sealing plugs 562 and 564.

In the example of fig. 7, the inner wall of the second inner cavity 5642 is opened with a second oil guiding groove 509. The second oil guide groove 509 is connected to the second shielding portion 520. When the soot particles 110 enter the second inner cavity 5642 due to air fluctuation, the soot particles 110 are adsorbed on the inner wall of the second inner cavity 5642 to form condensate, and the condensate can flow out through the second oil guiding groove 509 at the bottom of the second sealing plug 564. The second oil guiding groove 509 is an elongated hole with a circular or square cross section, and preferably, the opening of the second oil guiding groove 508 is lower than the inside of the second inner cavity 5642, that is, the second oil guiding groove 509 is inclined downward in a direction away from the receiving portion 542, so as to facilitate the liquid to flow out. The second oil guiding groove 509 is also opened in parallel with the second inner cavity 5642 to allow the liquid to flow out. The length or diameter of the second oil guiding groove 509 is greater than or equal to 2.5mm (preferably, greater than or equal to 3mm) to overcome the internal tension of the liquid and facilitate the liquid flowing out.

Referring to fig. 8, the number of the light emitting devices 52 is plural, the number of the light receiving devices 54 is single, and the central axis of each light emitting device 52 and the central axis of each light receiving device 54 intersect with the central axis of the end 210 of the lampblack air duct. The cooking fume duct end 210 includes the end of the volute 32 and the check valve 40. In one embodiment, the central axis of each of the light emitting devices and the central axis of the light receiving device intersect the central axis of the check valve 40, the central axis of each of the light emitting devices 52 intersects the central axis of the light receiving device 54 at different angles, and the angles range from (0 °,180 °).

In another embodiment, the included angle formed by the intersection of the central axis of each light emitting device 52 and the central axis of the light receiving device 54 is the same.

In yet another embodiment, the included angle formed by the intersection of the central axis of each light emitting device 52 and the central axis of the light receiving device 54 is partially the same and partially different.

In actual operation, one or two or more of the plurality of light emitting devices 52 may be illuminated at the same time, and the light received by the light receiving device 54, the light emitting devices 52 distributed at different positions in the circumferential direction of the check valve may increase the sensitivity of the smoke detecting assembly 50.

Preferably, since the sizes of the soot particles 110 are different, in the embodiment of fig. 8, the included angle formed by the intersection of the central axis of each light emitting device 52 and the central axis of the light receiving device 54 is different, the kitchen appliance 100 can be used for controlling the plurality of light emitting devices 52 to be lit for a preset time period according to a preset timing, and the light receiving device 54 can be used for receiving the light emitted by the light emitting devices 52 at different time intervals.

In the example of fig. 8, the number of the light emitting devices 52 is 3, the number of the light receiving devices 54 is 1, and the angle formed by the intersection of the central axis of the first light emitting device 52A and the central axis of the light receiving device 54 is 120 degrees. The central axis of the second light emitting device 52B intersects the central axis of the light receiving device 54 at an angle of 60 degrees. The central axis of the third light emitting device 52C intersects the central axis of the light receiving device 54 at an angle of 30 degrees.

Specifically, the controller of the kitchen appliance 100 may control the first light-emitting device 52A to be turned off after being turned on for a first predetermined period of time, then control the second light-emitting device 52B to be turned off after being turned on for a second predetermined period of time, and then control the third light-emitting device 52C to be turned off after being turned on for a third predetermined period of time, the light-receiving device 54 sequentially receives light emitted from the first light-emitting device 52A and processes light emitted from the first light-emitting device 52A for the first predetermined period of time to output corresponding electrical signals, receives light emitted from the second light-emitting device 52B and processes light emitted from the second light-emitting device 52B for the second predetermined period of time to output corresponding electrical signals, and receives light emitted from the third light-emitting device 52C and processes light emitted from the third light-emitting device 52C for the third predetermined period of time to output corresponding electrical signals.

Fig. 9 is a diagram showing a driving current and time of the light emitting devices, and in the example of fig. 9, the first light emitting device 52A is driven to emit light within 0-1ms, while the light receiving device 54 receives the light emitted from the first light emitting device 52A within 0-1ms, and processes the light emitted from the first light emitting device 52A within 1-2ms to output an electric signal of a phase. The second light emitting device 52B is driven to emit light within 2-3ms, and the light receiving device 54 receives the light emitted from the second light emitting device 52B within 2-3ms and processes the light emitted from the second light emitting device 52B within 3-4ms to output a corresponding electrical signal. The third light emitting device 52C is driven to emit light within 4-5ms, while the light receiving device 54 receives light emitted from the third light emitting device 52C within 4-5ms and processes the light emitted from the third light emitting device 52C within 5-6ms to output a corresponding electrical signal. The first light emitting device 52A is driven to emit light within 6-7ms, while the light receiving device 54 receives light emitted from the first light emitting device 52A within 6-7ms and processes the light emitted from the first light emitting device 52A within 7-8ms to output a corresponding electrical signal. The second light emitting device 52B is driven to emit light within 8-9ms, and the light receiving device 54 receives the light emitted from the second light emitting device 52B within 8-9ms, and processes the light emitted from the second light emitting device 52B within 9-10ms to output a corresponding electrical signal. The third light emitting device 52C is driven to emit light within 10-11ms, while the light receiving device 54 receives light emitted from the third light emitting device 52C within 10-11ms and processes the light emitted from the third light emitting device 52C within 11-12ms to output a corresponding electrical signal. By analogy, the kitchen appliance 100 controls the air volume of the fan 34 according to the electric signal output by the light receiving device 54.

Further, the kitchen appliance 100 can determine the distribution characteristics of the size of the soot particles according to the electrical signals output from the plurality of light receiving devices 54. Specifically, according to mie scattering theory: when the limit of suspended particles in a turbid medium is comparable to the wavelength of the incident light, the formula for the scattered light intensity is given by: i is_θ∝1/λ^N. Wherein, I theta is the scattering light intensity, lambda is the wavelength of the incident light, and N is the number of medians. This expression can be understood as: in the case where the angular distribution of the scattered light intensity is no longer symmetrical, the scattered light intensity in the direction of the incident light will be greater than the light intensity in the direction of the counter-incident light as the size of the particles increases. In the present embodiment, different angles formed between the light emitting device 52 and the light receiving device 54 correspond to different soot particle sizes when the light emitting device 52 uses the same emission wavelength, as shown in the following table. According to the light intensity detected in a time-sharing mode, the distribution characteristics of the sizes of the oil smoke particles in a certain time period can be obtained, the sizes of the particles of the water vapor particles used for heating the oil are different, and the following table I is shown:

watch 1

In this way, the light receiving device 54 can output a corresponding electrical signal according to the light emitted by the light emitting device 52, and the controller of the kitchen appliance 100 is configured to derive the distribution characteristic of the size of the soot particles 110 within a certain preset time period according to the electrical signal output by the light receiving device 54.

In the embodiment of the present invention, the kitchen appliance 100 is configured to determine a cooking habit according to a distribution characteristic of a size of soot particles, and to perform a cleaning prompt according to the cooking habit, and to push a cooking guide to a preset terminal according to the cooking habit. Therefore, the kitchen appliance 100 can provide more appropriate air volume of the fan according to the determined cooking habit and remind the user of cleaning the kitchen appliance 100 in time.

In another embodiment, the kitchen appliance 100 is used for determining cooking habits according to the distribution characteristics of the sizes of the soot particles, and for performing cleaning reminding according to the cooking habits, or pushing cooking guidance to a preset terminal according to the cooking habits.

Specifically, referring to fig. 10 and 11, the oil smoke particles 110 generated during the cooking of the light oil smoke are larger in size, so that the smaller the angle between the light emitting device 52 and the light receiving device 54 is, the stronger the intensity of the light detected by the light receiving device 54 is, as shown in fig. 10. The oil smoke particles are smaller in size when heavy oil smoke is cooked, so that the larger the included angle between the light emitting device 52 and the light receiving device 54 is, the stronger the intensity of the light detected by the light receiving device 54 is, as shown in fig. 11. Therefore, the cooking habits of the user are determined by the size distribution characteristics of the particulate matter.

In the present embodiment, because the particle size of the water vapor is much larger than the particle size of the soot, the water vapor can be distinguished from the soot particles by the particle size, so as to select different air volumes of the blower, for example, when the water vapor is detected, the user is considered to be boiling water, and the blower is operated at a low gear. When the detected oil smoke particles are oil smoke particles, the gear of the fan is increased according to the concentration of the oil smoke particles. After the distribution and the concentration of the oil smoke particles are obtained through the embodiment, the oil smoke particles can be pushed out according to time integral to how much oil stains are discharged by the fan, and a user can be reminded to clean the oil cup and the impeller according to the accumulated oil consumption. Furthermore, the size of the oil smoke particles is obtained through the above embodiment, so that the weight of the oil smoke during cooking can be known, the taste of a user can be calculated, and the reasonable healthy cooking guidance for pushing the user can be obtained according to the size distribution of the oil smoke particles. The kitchen appliance 100 may first preset the terminal to transmit the cooking guide. The default terminal includes, but is not limited to, a mobile phone, a tablet computer, a personal computer, a wearable smart device, or other types of household appliances.

For example, for a user whose cooking habit is mainly heavy oil smoke, the reminding time period can be set to be shorter, and accordingly, some healthy cooking directions of light oil smoke can be pushed. For the user with the cooking habit mainly based on cooking, the reminding duration can be set to be longer, and some healthy cooking menus can be pushed.

In fig. 8, the light emitting device 52 includes a first lens 57, the first lens 57 is disposed in the first inner cavity 5622 and located on the light outgoing path of the emitting portion 522, and the first lens 57 is used for emitting the light rays emitted from the emitting portion 522 in parallel. In this way, substantially all of the light emitted from the emitting portion 522 can be guided into the smoke passage of the check valve 40, and the sensitivity of the smoke detection unit 50 is further improved.

Specifically, the emitting portion 522 of the light emitting device 52 is located at the focal position of the first lens 57, so as to converge the light rays into a parallel light column to be emitted.

The light receiving device 54 includes a second lens 58, the second lens 58 is disposed in the second inner cavity 5642 and located on a receiving light path of the receiving portion 542, and the second lens 58 is configured to converge the light entering from the second inner cavity 5642 to the receiving portion 542. In this way, light entering the second inner cavity 5642 can be substantially converged to the receiving portion 542, and the sensitivity of the lampblack detection assembly 50 is further improved.

Specifically, the sensor chip sensing window of the receiving portion 542 of the light receiving device 54 is located at the focal position of the second lens 58, so as to collect and receive the light rays of the second inner cavity 5642. The first lens 57 and the second lens 58 are both convex lenses, or a lens group equivalent to a convex lens.

Further, a first paraboloid 5672 is formed at one end of the first inner cavity 5622, and the emitting portion 522 is located at a focal point of the first paraboloid 5672, so as to converge the light rays emitted from the emitting portion 522 into a parallel light column to be emitted. Specifically, in the illustrated embodiment, a first light guide hole 5652 is formed at a focal point of the first paraboloid 5672, and the emitting portion penetrates through the first light guide hole 5652. It is understood that in other embodiments, the emitting portion 522 may be positioned directly at the focal point of the first paraboloid 5672. The embodiment in which the first cavity 5622 is provided with the first paraboloid 5672 is applicable to the embodiment in which the first lens 57 is provided in the first cavity 5622 and the embodiment in which the first lens 57 is not provided.

Further, a second paraboloid 5674 is formed at one end of the second cavity 5642, and the receiving portion is located at a focal point of the second paraboloid 5674. In this way, the light in the second inner cavity 5642 is converged to the receiving part for receiving. Specifically, in the illustrated embodiment, the second light guide hole 5654 is formed at the focal point of the second paraboloid 5674, and the receiving portion 542 is formed through the second light guide hole 5654. It is understood that in other embodiments, the receiving portion 542 may be directly placed at the focal point of the second paraboloid 5674. The embodiment in which the second cavity 5642 is provided with the second paraboloid 5674 is applicable to the embodiment in which the second lens 58 is provided in the second cavity 5642 and the embodiment in which the second lens 58 is not provided.

In the example of fig. 12, the first sealing plug 562 also includes a locating pin 561. The sealing plug 56 can be accurately mounted on the first fixing portion 521 by the positioning action of the positioning pin 561. The planar shape of the positioning pin 561 is rectangular, circular, triangular, etc., and is not limited herein. In the example of fig. 12, the planar shape of the positioning pin 561 is rectangular. The second sealing plug 564 is of similar construction to the first sealing plug 562.

In summary, the kitchen appliance 100 according to the embodiment of the present invention includes a lampblack air channel having the fan 34 and a lampblack detection assembly 50, the lampblack detection assembly 50 is disposed on the lampblack air channel, the lampblack detection assembly 50 includes a plurality of light emitting devices 52 and a plurality of light receiving devices 54 spaced along a circumferential direction of the lampblack air channel of the kitchen appliance 100, the number of the light emitting devices 52 is multiple, the number of the light receiving devices 54 is single, the light emitting devices 52 are configured to emit light to the lampblack air channel, the light receiving devices 54 are configured to receive the light emitted by the light emitting devices 52 and output an electrical signal according to the received light, and the kitchen appliance 100 is configured to control the kitchen appliance 100 according to the.

In the kitchen appliance 100 according to the embodiment of the present invention, the light emitting devices 52 and the light receiving devices 54 are disposed in the lampblack air channel, the number of the light emitting devices 52 is plural, the number of the light receiving devices 54 is single, the plurality of light emitting devices 52 can emit light to the lampblack air channel, and the light receiving devices 54 can receive the light emitted by the light emitting devices and output electrical signals according to the received light, so that under the condition that the lampblack particles in the lampblack air channel are not uniformly distributed, the kitchen appliance 100 according to the embodiment of the present invention can accurately detect the concentration of the lampblack particles and the size and distribution of the lampblack particles, and further can provide a proper amount of air of the fan to absorb the lampblack particles.

It should be noted that, in the drawings of the present invention, a straight line with an arrow indicates a light ray and a propagation direction thereof, which are schematic representations and should not be construed as limiting the present invention.

In the description of the specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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 of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, unless specifically limited otherwise.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention, which is defined by the claims and their equivalents.

Claims

1. The utility model provides a kitchen appliance, its characterized in that, kitchen appliance is including the oil smoke wind channel and the oil smoke determine module that have the fan, oil smoke determine module establishes on the oil smoke wind channel, oil smoke determine module includes the edge light emitting device and the light receiving device that the circumference interval in kitchen appliance's oil smoke wind channel set up, light emitting device's quantity is a plurality of, light receiving device's quantity is single, light emitting device be used for to oil smoke wind channel emission light, light receiving device is used for receiving the light of light emitting device transmission and according to the light output signal of telecommunication received, kitchen appliance is used for the basis signal of telecommunication control kitchen appliance.

2. The kitchen appliance according to claim 1, wherein the central axis of each light emitting device and the central axis of each light receiving device intersect with the central axis of the end of the lampblack air channel, and the central axes of the light emitting devices and the central axes of the light receiving devices intersect to form different included angles, or the same included angles, or partially the same included angles, and partially the different included angles range from (0 ° to (180 °).

3. The kitchen appliance according to claim 1, wherein the kitchen appliance is configured to control the plurality of light emitting devices to be turned on at a predetermined timing for a predetermined time period, and the light receiving device is configured to receive the light emitted from the light emitting devices at different times.

4. The kitchen appliance of claim 1, wherein the kitchen appliance is configured to determine a distribution characteristic of a size of soot particles based on the electrical signals output by the plurality of light receiving devices.

5. The kitchen appliance according to claim 4, wherein the kitchen appliance is configured to determine a cooking habit according to the distribution characteristics of the size of the soot particles, and to perform a cleaning prompt according to the cooking habit, and/or to push a cooking guide to a preset terminal according to the cooking habit.

6. The kitchen appliance according to claim 1, wherein said light emitting means comprises a first sealing plug mounted on said first circuit board, a emitting portion formed with a first cavity, and a first circuit board on which said emitting portion is located; and/or

The light receiving device comprises a second sealing plug, a receiving part and a second circuit board, wherein the second sealing plug is installed on the second circuit board, a second inner cavity is formed in the second sealing plug, and the receiving part is located in the second inner cavity and arranged on the second circuit board.

7. The kitchen appliance of claim 6, wherein the first cavity is formed with a first paraboloid at one end thereof, and the emitting portion is located at a focal point of the first paraboloid; and/or

A second paraboloid is formed at one end of the second inner cavity, and the receiving part is located at the focal point of the second paraboloid.

8. The kitchen appliance according to claim 6, wherein the light emitting device comprises a first lens disposed in the first inner cavity and located on the light emitting path of the emitting portion, the first lens being configured to emit the light emitted from the emitting portion in parallel; and/or

The light receiving device comprises a second lens, the second lens is arranged in the second inner cavity and positioned on the receiving light path of the receiving part, and the second lens is used for converging light entering from the second inner cavity to the receiving part.

9. The kitchen appliance according to claim 6, wherein a first shielding portion is provided on an inner wall of the first inner cavity and located at a front end of the emitting portion; and/or

And a second shielding part positioned at the front end of the receiving part is arranged on the inner wall of the second inner cavity.

10. The kitchen appliance according to claim 9, wherein the inner wall of the first inner cavity is provided with a first oil guide groove connected with the first shielding portion; and/or

And a second oil guide groove connected with the second shielding part is formed in the inner wall of the second inner cavity.