CN110617534A - Sealing plug, oil smoke sensing device and kitchen equipment - Google Patents

Abstract

The invention discloses a sealing plug, an oil smoke sensing device and kitchen equipment. An inner cavity is formed in the sealing plug, the inner cavity comprises an opening end and an accommodating end which are respectively located at two ends of the sealing plug, a detection opening is formed in the opening end, the accommodating end is used for accommodating the oil smoke sensing part, a shielding part which is connected with the opening end and the accommodating end is arranged on the inner wall of the inner cavity, and the shielding part comprises a shielding ring which is spirally and convexly arranged on the inner wall of the inner cavity. In the sealing plug, the shielding part comprises the shielding ring which is spirally and convexly arranged on the inner wall of the inner cavity, when the injection molding module is produced, the mold core can be smoothly demoulded after being overturned for a plurality of circles, strong drawing is not needed, the production efficiency of the sealing plug can be improved, and meanwhile, a deep cavity with a larger depth-to-width ratio is obtained.

Description

Sealing plug, oil smoke sensing device and kitchen equipment

Technical Field

The invention relates to the technical field of kitchen appliances, in particular to a sealing plug, an oil smoke sensing device and kitchen equipment.

Background

In the related art, a smoke apparatus generally detects smoke concentration using a smoke sensing device. In the oil smoke sensing device, the rubber stopper is used as a key part of the oil smoke sensing device, and can play roles of sealing, oil blocking, oil guiding, optical structures and the like. When current rubber stopper was in production, need take out the mold core of rubber buffer in the cavity of rubber buffer, the resistance is great, and easily will shelter from the ring and break, is difficult to form darker recess as sheltering from the ring, and shelters from the quantity of ring and also has the restriction, is difficult to obtain the deep cavity of great aspect ratio, and manufacturability is relatively poor.

Disclosure of Invention

The embodiment of the invention provides a sealing plug, an oil smoke sensing device and kitchen equipment.

An inner cavity is formed in the sealing plug of the embodiment of the invention, the inner cavity comprises an opening end and an accommodating end which are respectively positioned at two ends of the sealing plug, the opening end is provided with a detection opening, the accommodating end is used for accommodating an oil smoke sensing part, the inner wall of the inner cavity is provided with a shielding part which is connected with the opening end and the accommodating end, and the shielding part comprises a shielding ring which is spirally and convexly arranged on the inner wall of the inner cavity.

In the sealing plug, the shielding part comprises the shielding ring which is spirally and convexly arranged on the inner wall of the inner cavity, when the injection molding module is produced, the mold core can be smoothly demoulded after being overturned for a plurality of circles, strong pulling is not needed, the production efficiency of the sealing plug can be improved, and a deep cavity with a larger depth-to-width ratio is obtained.

In some embodiments, the lumen is in the shape of a diverging or constant diameter helix from the receiving end toward the open end. So, be convenient for like this at the oil-water mixture that the inner chamber formed outflow from the inner chamber.

In some embodiments, the inner wall of the accommodating end is provided with a paraboloid, and the focal point of the paraboloid is used for placing the oil smoke sensing part. Therefore, the sensitivity of the oil smoke sensing part is improved.

In some embodiments, the accommodating end is provided with a through hole. Therefore, the electric connection of the oil smoke sensing part is facilitated.

In some embodiments, the outer side of the receiving end is provided with a positioning portion for positioning and mounting the sealing plug to a preset position of the kitchen appliance. This allows the sealing plug to be more easily mounted on the smoke sensing means.

The embodiment of the invention provides an oil smoke sensing device which comprises an oil smoke sensing part and a sealing plug of any one embodiment, wherein the oil smoke sensing part is accommodated in the accommodating end.

In the oil smoke sensing device, the shielding part comprises the shielding ring which is spirally and convexly arranged on the inner wall of the inner cavity, and the inner cavity is in a gradually expanding shape from the accommodating end to the opening end, so that oil and water formed in the inner cavity can be mixed and flow out of the inner cavity conveniently, and when an injection molding module is produced, the mold core can be smoothly demoulded after being overturned for a plurality of circles without strong pulling, the production efficiency of the sealing plug can be improved, and a deep cavity with a larger depth-to-width ratio can be obtained.

In some embodiments, the oil smoke sensing portion includes a light receiving portion or a light emitting portion, and the oil smoke sensing device includes a lens disposed in the inner cavity and located at a front end of the oil smoke sensing portion, wherein the lens is configured to emit light emitted from the light emitting portion in parallel or to converge light from the inner cavity to the light receiving portion. Thus, it is advantageous to improve the effect of the light emitting portion emitting light and the light receiving portion receiving light.

In some embodiments, the oil smoke sensing portion is configured to detect a concentration of organic molecules, and the oil smoke sensing device includes a waterproof air-permeable membrane disposed in the inner cavity and located at a front end of the oil smoke sensing portion. Therefore, the probability of pollution of the oil smoke particles and the organic molecular substances to the oil smoke sensing part can be reduced.

In some embodiments, the smoke sensing device comprises a circuit board, and the sealing plug is mounted on the circuit board. Thus, the electric signal output of the oil smoke sensing device can be realized.

An embodiment of the invention provides kitchen equipment comprising the oil smoke sensing device in any one of the embodiments.

In the kitchen equipment, the shielding part comprises the shielding ring which is spirally and convexly arranged on the inner wall of the inner cavity, and the inner cavity is in a gradually expanding shape from the accommodating end to the opening end, so that oil-water mixture formed in the inner cavity flows out from the inner cavity conveniently, and when the injection molding module is produced, the mold core can be smoothly demoulded after being overturned for a plurality of circles without strong pulling, the production efficiency of the sealing plug can be improved, and meanwhile, a deep cavity with a larger depth-to-width ratio is obtained.

In some embodiments, the kitchen equipment comprises a lampblack sensing device, the lampblack sensing device comprises a light emitting device and a light receiving device, the central axis of the light emitting device and the central axis of the light receiving device intersect with the central axis of a lampblack air channel of the kitchen equipment, and the central axis of the light emitting device and the central axis of the light receiving device are located on the same line or different lines. So, realize like this that oil smoke sensing device's installation and be favorable to detecting the concentration of oil smoke granule.

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 view of a kitchen appliance according to an embodiment of the present invention.

Fig. 3 is a further schematic view of a kitchen appliance according to an embodiment of the 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 schematic structural diagram of a lampblack sensor according to an embodiment of the invention.

Fig. 6 is another schematic structural diagram of the lampblack sensor according to the embodiment of the invention.

Fig. 7 is another schematic structural diagram of the lampblack sensor according to the embodiment of the invention.

Fig. 8 is a schematic view of another structure of the smoke sensor according to the embodiment of the present invention.

Fig. 9 is a schematic view of the construction of a sealing plug of an embodiment of the invention.

Fig. 10 is a cross-sectional view of a sealing plug of an embodiment of the invention.

Description of the main element symbols:

kitchen equipment 100, a flow guide plate assembly 10, a touch key 12, a box body 20, a top 22, a fan assembly 30, a volute 32, a fan 34, a check valve assembly 410, a check valve 40, a lampblack sensing device 50, a lampblack sensing part 51, a light emitting device 52, a first fixing part 521, an emitting part 522, a light receiving device 54, a second fixing part 541, a receiving part 542, a wire protection structure 60, a protection box 70, a junction box 80, a wiring port 82, a shell 84, a sealing plug 90, a through hole 91, an inner cavity 92, an open end 922, a detection opening 9221, a containing end 924, a shielding part 926, a shielding ring 9261, a paraboloid 928, lampblack particles 110, a circuit board 120, a lens 130, a positioning part 140, a positioning pin 142, an organic molecule sensor 210, a waterproof breathable film 220 and.

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 upward-type kitchen appliance 100. It is understood that in other embodiments, the kitchen device 100 may be a bottom-up kitchen device 100, a side-up kitchen device 100, or the like, and is not limited thereto. The following description will be made in detail with an example of the kitchen appliance 100 being an upper-row kitchen appliance 100. Specifically, the kitchen appliance 100 includes, but is not limited to, a cooking fume appliance, an integrated range, and the like having a cooking fume exhausting function. In the illustrated embodiment, the kitchen appliance 100 will be described by taking an oil smoke facility as an example.

The kitchen apparatus 100 according to the embodiment of the present invention includes a baffle assembly 10, a cabinet 20, and a check valve assembly 410, wherein the check valve assembly 410 includes a check valve 40, the cabinet 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 apparatus 100 is turned on, and the soot particles 110 can enter the cabinet 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 apparatus 100 according to an embodiment of the present invention includes a smoke sensing device 50, in the example of fig. 3, the smoke sensing device 50 is disposed on a smoke duct of the kitchen apparatus 100, and the smoke duct of the kitchen apparatus 100 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 sensing device 50 can be disposed at the air outlet channel 321 of the volute 32, and specifically, the smoke sensing device 50 can be mounted at the inner wall or the outer wall of the air outlet channel 321 of the volute 32. In another embodiment, the smoke sensing device 50 may be disposed at the smoke channel 41 of the check valve 40, and specifically, the smoke sensing device 50 may be disposed at the inner wall or the outer wall of the smoke channel 41 of the check valve 40. In the embodiment of the present invention, the smoke sensor 50 is provided on the outer wall of the smoke passage 41 of the check valve 40. In other embodiments, the smoke sensing device 50 may be disposed on the baffle assembly 10, the volute 32, the baffle assembly 10 and the check valve 40, the baffle assembly 10 and the volute 32, the check valve 40 and the volute 32, or the check valve 40, the baffle assembly 10 and the volute 32. The smoke sensing device 50 is used to detect the smoke concentration of a smoke stack located in at least one of the check valve 40, the deflector assembly 10, and the volute 32.

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.

The smoke sensing device 50 may include at least one of an infrared sensing device, a laser sensing device, and an organic molecule sensing device, which is not limited herein. The organic molecule sensing device may comprise an organic molecule sensor (VOC sensor). The following embodiments are described in detail with the oil smoke sensor 50 as an infrared sensor.

The smoke sensing device 50 includes a light emitting device 52 and a light receiving device 54 that are spaced apart and opposed. The light emitting device 52 is used for emitting light to the cooking fumes duct 41 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 (light intensity 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 soot air duct 41 of 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 device 100 can control the operation of the fan 34 according to the electrical signal, so that the fan 34 can provide a proper air volume 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 device 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. In other embodiments, the concentration of soot particles 110 may be calibrated by the electrical signal output by organic molecule sensor 210.

Referring to fig. 4, in the example of fig. 4, the kitchen apparatus 100 further includes a fixing portion disposed on an outer wall of the soot air duct 41 of the check valve 40 at intervals, and the light emitting device 52 and the light receiving device 54 are mounted on the fixing portion at intervals. 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 may be a separate structure, that is, the first fixing portion 521 and the second fixing portion 541 are separate structures from the check valve 40. Thus, the oil smoke sensing device 50 can be applied to different types of check valves 40, and the original oil smoke sensing device 50 and other components can be used, so that the improvement cost of the check valve 40 can be reduced, and the efficiency can be improved. 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 apparatus 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 sensing means 50 includes wires (not shown) connecting the light emitting means 52 and the light receiving means 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 sensing device 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 and 4, 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 installed at the cabinet 20, the protection box 70 connects the check valve 40 and the junction box 80, the protection box 70 receives a wire between the wire protection structure 60 and the junction box 80, and the wire is inserted into 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 or a singlechip), a transformer and other electric parts, electric signals output by the oil smoke sensing device 50 can be transmitted to the controller through wires, and the controller can analyze the concentration and distribution characteristics of the oil smoke particles 110 according to the electric signals and control the air volume of the kitchen equipment 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 sensor device 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 lampblack sensor 50 need to be protected by the wire protection structure 60, the protection box 70 and the like. The product packaging scheme of the kitchen appliance 100 is generally to separate and package the check valve assembly (including the check valve 40 and the various components and parts mounted on the check valve 40 including the smoke sensing device 50) from the cabinet 20, and to mount the check valve assembly from the after-sales door, a quick-release structure of the check valve assembly and the wiring box 80 is required to be designed in order to reduce the after-sales workload.

Specifically, the check valve assembly 410 is fixed on the top of the box body 20, and after the wire protection structure 60 is fixed by a snap or a screw, the wire connecting the light emitting device 52 and the light receiving device 54 can be covered for protection. 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 the example of fig. 5, the smoke sensing device 50 includes a smoke sensing portion 51 and a sealing plug 90. In the example of fig. 5 and 9, an inner cavity 92 is formed in the sealing plug 90, the inner cavity 92 includes an opening end 922 and an accommodating end 924 located at two ends of the sealing plug 90, respectively, the opening end 922 is provided with a detection opening 9221, the accommodating end 924 is used for accommodating the oil smoke sensing portion 51, a shielding portion 926 connecting the opening end 922 and the accommodating end 924 is provided on an inner wall of the inner cavity 92, the shielding portion 926 includes a shielding ring 9261 protruding from the inner wall of the inner cavity 92 in a spiral shape, and the inner cavity 92 is in a shape gradually expanding from the accommodating end 924 to the opening end 922.

In the sealing plug 90 of the above embodiment, the shielding portion 926 includes the shielding ring 9261 protruding from the inner wall of the inner cavity 92 in a spiral shape, and the inner cavity 92 is in a shape gradually expanding from the accommodating end 924 to the opening end 922, so that the oil-water mixture formed in the inner cavity 92 flows out from the inner cavity 92, and when the injection mold is produced, the mold core can be smoothly demolded after being inverted for several turns without being pulled forcibly, the production efficiency of the sealing plug 90 can be improved, and a deep cavity with a large depth-to-width ratio can be obtained.

Specifically, the shielding ring 9261 is formed in a spiral shape as a whole, and is spirally expanded from the accommodating end toward the opening end. In one embodiment, the sealing plug 90 is cylindrical, the outer diameter of the sealing plug 90 is 15-25 mm, the inner diameter of the sealing plug is 6-20 mm, and the depth of the shielding ring 9261 is 3-8 mm. 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 sealing plug 90 may have a regular or irregular nominal shape such as a rectangular parallelepiped shape or a square shape, and is not particularly limited herein.

In one embodiment, referring to fig. 5, the smoke sensing device 50 includes a light emitting device 52 and a light receiving device 54. The light emitting device 52 and the light receiving device 54 each include a sealing plug 90 as described above with reference to fig. 9. The smoke sensing part 51 includes a light emitting part 522 and a light receiving part 542. The light emitting portion 522 is disposed at the receiving end 924 of the light emitting device 52. The light receiving section 542 is disposed at the receiving end 924 of the light receiving device 54. When the soot particles 110 enter the inner cavity 92 due to air fluctuation, the soot particles 110 are adsorbed on the inner cavity 92, and the pollution of the soot particles 110 to the light emitting portion 522 and the light receiving portion 542 can be reduced due to the shielding effect of the shielding portion 926. As for the shielding ring 9261, the grooves of the shielding ring 9261 absorb air fluctuation, and the soot particles 110 are further intercepted by the shielding ring 9261, therefore, the shielding ring 9261 can further improve the shielding effect on the soot particles 110, and further prevent the soot particles 110 from polluting the light emitting portion 522 and the light receiving portion 542 and affecting the service life of the light emitting portion 522 and the light receiving portion 542.

Specifically, in the example of fig. 5 and 9, the inner wall of the accommodating end 924 is provided with a paraboloid 928, and the focal point of the paraboloid 928 is provided with the smoke sensing part 51. In the example of fig. 5, the light emitting portion 522 may be placed at the focal point of a paraboloid 928 of the sealing plug 90 of the light emitting device 52. The light receiving section 542 may be placed at the focal point of the paraboloid 928 of the sealing plug 90 of the light receiving device 54. In this manner, the efficiency of the light emitting portion 522 emitting light and the light receiving portion 542 receiving light can be improved.

In the example of fig. 5 and 6, the smoke sensing device 50 includes a circuit board 120, and the sealing plug 90 is mounted on the circuit board 120. Thus, the oil smoke sensing part 51 can be electrically connected to the circuit board 120. In the example of fig. 9 and 10, the receiving end is opened with a through hole 91. The oil smoke sensing portion 51 can be electrically connected to the circuit board 120 by passing through the through hole 91. In other embodiments, the smoke sensing portion 51 can be disposed in the inner cavity, and the through hole 91 can be used for a wire connected to the smoke sensing portion 51 to pass through.

In the example of fig. 6, the smoke sensing device 50 includes a lens 130, the lens 130 is disposed in the inner cavity 92 and located at the front end of the smoke sensing part 51, and the lens 130 is used for emitting the light emitted from the light emitting part 522 in parallel and for converging the light emitted from the light emitting part 522 to the light receiving part 542. In this way, the efficiency of the light emitted from the light emitting unit 522 and the light received by the light receiving unit 542 can be improved, and the sensitivity of the smoke sensing device 50 can be further improved.

Specifically, in the example of fig. 6, the lens 130 is disposed in the inner cavity 92 of the sealing plug 90 of the light emitting device 52 and located on the light outgoing path of the light emitting portion 522, and the lens 130 is used for emitting the light rays emitted from the light emitting portion 522 in parallel. In this way, substantially all of the light emitted from the light emitting unit 522 can be guided to the smoke duct of the kitchen appliance. The lens 130 is disposed in the cavity 92 of the sealing plug 90 of the light receiving device 54 and is located on the light receiving path of the light receiving portion 542, and the lens 130 is used for converging the light in the cavity 92 of the sealing plug 90 of the light receiving device 54 to the light receiving portion 542. In this manner, substantially all of the light entering the inner cavity 92 can be focused on the light receiving portion 542.

In the example of fig. 5, the central axis of the light emitting device 52 and the central axis of the light receiving device 54 are located on the same line on a plane (in fig. 5, the plane is parallel to the paper plane) perpendicular to the central axis of the check valve. The light emitting device 52 emits light (e.g., infrared light) that passes through the area of the cooking fume path of the check valve 40 and is received by the opposing light receiving device 54. The soot particles 110 pass through the light path, causing the light to be blocked, scattered, and diffracted, causing the intensity of the light received by the light receiving device 54 to be reduced. When the amount of soot decreases, the shielding effect is reduced, and the intensity of light received by the light receiving device 54 increases. The light intensity can be represented by the value of the electrical signal, for example, the light receiving device 54 receives the light and outputs the electrical signal, the electrical signal is analog-to-digital converted to obtain a digital signal, and the digital signal can be used to obtain a corresponding value, such as a voltage value. When the soot wind channel region is free of particles, the detected light intensity of the light receiving device 54 is substantially unchanged, i.e. the value (e.g. voltage value) of the output electrical signal is substantially unchanged.

In the example of fig. 7, the light emitting device 52 and the light receiving device 54 are disposed at intervals in the circumferential direction of the check valve 40, and the central axis T1 of the light emitting device 52 and the central axis T2 of the light receiving device 54 intersect with the central axis of the check valve in the vertical direction (the central axis is perpendicular to the paper plane). The central axis of the light emitting device 52 and the central axis of the light receiving device 54 are located on different straight lines on a plane perpendicular to the central axis of the check valve 40. The central axis T1 of the light emitting device 52 and the central axis T2 of the light receiving device 54 intersect at an angle α. The light emitted from the light emitting device 52 may pass through the inner region of the check valve 40 and form multiple reflections in the cooking fume duct 41 of the check valve 40 under the scattering effect of the cooking fume particles 110 on the light so that the light may be received by the light receiving device 54. According to the meter scattering theory, in the case where the light emitting device 52 and the light receiving device 54 are alternately arranged to form the included angle α degrees, when the inner region of the check valve 40 is free of soot particles 110, almost no infrared light is received by the light receiving device 54, and the intensity of light received by the light receiving device 54 is weak. When soot particles 110 are present in the inner area of the check valve 40, infrared light emitted from the light emitting device 52 is scattered by the soot particles 110, and a part of the infrared light is received by the light receiving device 54, so that the intensity of the light received by the light receiving device 54 is stronger.

It should be noted that, in fig. 5 to 7, the detection opening 9221 of the light receiving device 54 may be designed to be larger than the detection opening 9221 of the light emitting device 52, which is advantageous in that the emitted light of the light emitting device 52 can be better received by the light receiving device 54.

In another embodiment, as shown in fig. 8, the oil smoke sensing portion 51 is used for detecting the concentration of organic molecules, and the oil smoke sensing device 50 includes a waterproof breathable film 220, and the waterproof breathable film 220 is disposed in the inner cavity 92 and located at the front end of the oil smoke sensing portion 51.

In the example of fig. 8, the smoke sensing part 51 may be a component of the organic molecule sensor 210. In the illustrated embodiment, the organic molecule sensor 210 is equipped with a check valve 40. In other embodiments, the organic molecule sensor 210 may be mounted on the volute 32 or at any position of the smoke duct of the kitchen apparatus 100, which is not limited herein.

Specifically, the soot particles 110 and the organic molecules 230 on the soot duct of the kitchen device 100 enter the inner cavity 92 through diffusion. Since the organic molecules 230 have a diffusion effect stronger than that of the soot particles 110, the soot particles 110 are adsorbed on the inner cavity 92 under the shielding effect of the shielding portion 926, and the organic molecules 230 may fall into the soot sensing portion 51 through the inner cavity 92. Therefore, in the present embodiment, the waterproof air-permeable membrane 220 is provided at the front end of the organic molecule sensor 210, so that the organic molecules diffused into the cavity 92 can be prevented from falling into the organic molecule sensor 210, and the detection accuracy of the organic molecule sensor 210 can be improved. In the illustrated embodiment, the waterproof breathable membrane 220 is disposed at one end of the receiving end 924.

Specifically, the organic molecule sensor 210 may be a VOC (volatile organic compound) sensor. In the example of fig. 8, the organic molecule sensor 210 is mounted on the check valve 40. The organic molecule sensor may detect the concentration of the organic molecules 230 in the check valve 40, and may average the concentration data of the organic molecules 230 collected from the organic molecule sensor 210 within a preset time, and the average value is used as a basis for controlling the operation of the fan 34.

In addition, since oil smoke is generated during cooking, and the oil smoke contains a large amount of organic molecules 230 and oil smoke particles 110, generally, the concentration of the organic molecules 230 is proportional to the concentration of the oil smoke particles 110, and therefore, the concentration of the oil smoke particles 110 can be detected by detecting the concentration of the organic molecules 230. The organic molecule sensor 210 installed on the kitchen device 100 can detect the concentration of the organic molecules 230 contained in the soot, and know the concentration of the soot particles 110 in the kitchen according to the proportional relationship between the concentration of the organic molecules 230 and the concentration of the soot particles 110. In the embodiment, the air volume of the fan 34 can be adjusted according to the concentration of the organic molecules 230 contained in the current oil smoke, so that the concentration of the oil smoke in the kitchen can be effectively purified in real time, the health of a human body can be protected, and when the concentration of the oil smoke is relatively low, the power of the fan 34 can be properly reduced, and the energy can be saved.

In this embodiment, the material of the waterproof breathable film 220 may be polytetrafluoroethylene, and the waterproof breathable film 220 may be an optional part or not.

In summary, an inner cavity 92 is formed in the sealing plug 90 according to the embodiment of the present invention, the inner cavity 92 includes an opening end 922 and an accommodating end 924 respectively located at two ends of the sealing plug 90, the opening end 922 is provided with a detection opening 9221, the accommodating end 924 is used for accommodating the oil smoke sensing portion 51, a shielding portion 926 connecting the opening end 922 and the accommodating end 924 is provided on an inner wall of the inner cavity 92, the shielding portion 926 includes a shielding ring 9261 protruding from the inner wall of the inner cavity 92 in a spiral shape, and the inner cavity 92 is in a shape gradually expanding from the accommodating end 924 to the opening end 922.

In the sealing plug 90 of the present embodiment, the shielding portion 926 includes the shielding ring 9261 protruding from the inner wall of the inner cavity 92 in a spiral shape, and the inner cavity 92 is in a shape gradually expanding from the accommodating end 924 to the opening end 922, so that the oil-water mixture formed in the inner cavity 92 flows out from the inner cavity 92, and when the injection mold is produced, the mold core can be smoothly demolded after being inverted for several turns without being pulled forcibly, the production efficiency of the sealing plug 90 can be improved, and a deep cavity with a large depth-to-width ratio can be obtained.

In the example of fig. 9 and 10, the outer side of the receiving end 924 is provided with a positioning portion 140, and the positioning portion 140 is used for positioning and mounting the sealing plug 90 to a preset position of the kitchen appliance. Specifically, the positioning part 140 includes a positioning pin 142. The sealing plug 90 can be accurately mounted on the smoke sensor 50 by the positioning function of the positioning pin 142. The planar shape of the positioning pin 142 is rectangular, circular, triangular, etc., and is not limited herein. In the example of fig. 9 and 10, the planar shape of the positioning pin 142 is rectangular.

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 (11)

1. The utility model provides a sealing plug, its characterized in that, be formed with the inner chamber in the sealing plug, the inner chamber is including being located respectively the open end and the holding end at sealing plug both ends, the open end has been seted up and has been detected the opening, the holding end is used for holding oil smoke sensing portion, the inner wall of inner chamber is equipped with the connection the open end with the shielding part of holding end, shielding part is protruding to be established including being the heliciform the ring that blocks up of inner chamber inner wall.

2. A sealing plug as claimed in claim 1, wherein the cavity is in the form of a diverging or constant diameter spiral from the receiving end towards the open end.

3. The sealing plug of claim 1, wherein the inner wall of the receiving end is provided with a paraboloid, and the focal point of the paraboloid is used for placing the oil smoke sensing part.

4. A sealing plug as claimed in claim 1, in which the receiving end is provided with a through bore.

5. A sealing plug as claimed in claim 1, wherein the outer side of the receiving end is provided with a locating portion for locating the sealing plug in a predetermined position in a kitchen appliance.

6. An oil smoke sensing device, characterized in that, the oil smoke sensing device comprises an oil smoke sensing part and a sealing plug of any one of claims 1 to 5, the oil smoke sensing part is accommodated in the accommodating end.

7. The lampblack sensor according to claim 6, comprising a light receiving portion or a light emitting portion, and a lens disposed in the inner cavity and located at the front end of the lampblack sensor, wherein the lens is used for emitting light emitted from the light emitting portion in parallel or converging light from the inner cavity to the light receiving portion.

8. The lampblack sensor according to claim 6, wherein the lampblack sensing part is used for detecting the concentration of organic molecules, and the lampblack sensor comprises a waterproof breathable film, and the waterproof breathable film is arranged in the inner cavity and located at the front end of the lampblack sensing part.

9. The smoke sensing device of claim 6, comprising a circuit board, said sealing plug being mounted on said circuit board.

10. A kitchen appliance comprising a smoke sensing device according to any of claims 6 to 9.

11. The kitchen device of claim 10, wherein the kitchen device comprises a smoke sensing device, the smoke sensing device comprises a light emitting device and a light receiving device, a central axis of the light emitting device and a central axis of the light receiving device intersect a central axis of a smoke duct of the kitchen device, and the central axis of the light emitting device and the central axis of the light receiving device are located on the same line or on different lines.