WO2021056861A1

WO2021056861A1 - Kitchen device

Info

Publication number: WO2021056861A1
Application number: PCT/CN2019/125982
Authority: WO
Inventors: 刘玉磊
Original assignee: 佛山市顺德区美的洗涤电器制造有限公司
Priority date: 2019-09-25
Filing date: 2019-12-17
Publication date: 2021-04-01

Abstract

A kitchen device (100), comprising a fan assembly (30) and a smoke detection assembly (50). The fan assembly (30) comprises a volute casing (32) and a fan (34) provided within the volute casing (32), a smoke air duct is located downstream of the fan (34), and the smoke detection assembly (50) is provided in the smoke air duct downstream of the fan (34). The smoke detection assembly (50) comprises a light emitting device (52) and a light receiving device (54), the light emitting device (52) is used for emitting light to the smoke air duct, 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. The central axis of an air outlet (321) of the volute casing (32) is located between the light receiving device (54) and the rotating axis of an impeller of the fan (34), or the central axis of the air outlet (321) of the volute casing (32) is located between the light emitting device (52) and the rotating axis of the impeller of the fan (34), so that the sensitivity of the smoke detection assembly (50) is improved.

Description

Kitchen appliances

Priority information

This application requests the priority and rights of the patent applications with patent application numbers 201910912619.2 and 201921611265.X filed with the State Intellectual Property Office of China on September 25, 2019, and the full text is incorporated herein by reference.

Technical field

This application relates to the technical field of kitchen appliances, in particular to a kitchen appliance.

Background technique

In the related art, the oil fume concentration is constantly changing when the user is cooking. Normally, the oil smoke device includes an oil smoke sensor, and the oil smoke sensor is set in the oil fume duct of the oil smoke apparatus. However, the distribution of oil fume particles in the oil fume duct is usually Uneven, therefore, different installation positions of the oil smoke sensor will cause different sensitivity of the oil smoke sensor.

Summary of the invention

The embodiment of the present application provides a kitchen device.

The kitchen device of the embodiment of the present application includes a fan assembly and a fume detection assembly. The fan assembly includes a volute and a fan arranged in the volute. The kitchen device includes a fume duct downstream of the fan. The oil fume detection assembly is arranged in the oil fume duct downstream of the fan. The oil fume detection assembly includes a light emitting device and a light receiving device. The light emitting device is used to emit light to the oil fume duct, and the light receiving device is used for receiving The light emitting device emits light and outputs an electrical signal according to the received light. The central axis of the air outlet of the volute is located between the light receiving device and the rotation axis of the fan impeller, or the worm The central axis of the air outlet of the shell is located between the light emitting device and the rotation axis of the impeller of the fan.

In the kitchen device of the above embodiment, the center axis of the air outlet of the volute is located between the light receiving device and the rotation axis of the fan impeller, or the center axis of the air outlet of the volute is located on the rotation axis of the light emitting device and the fan impeller In this way, when the concentration of oil fume particles in the oil fume duct changes slightly, the light intensity received by the light receiving device may change significantly, that is, the sensitivity of the oil fume detection assembly is improved.

In some embodiments, the central axis of the light emitting device and the central axis of the light receiving device intersect the central axis of the fume duct, and the central axis of the light emitting device and the light receiving device The central axis lies on the same straight line or on different straight lines. In this way, the installation of the oil fume detection component and the detection of the oil fume concentration of the oil fume particles are realized.

In some embodiments, the plane formed by the central axis of the light emitting device and the central axis of the light receiving device is parallel or inclined with respect to a plane perpendicular to the central axis of the fume duct. In this way, the installation of the oil fume detection component and the detection of the oil fume concentration of the oil fume particles are realized.

In some embodiments, the light emitting device includes a first sealing plug, an emitting portion, and a first circuit board, the first sealing plug is mounted on the first circuit board, and the first sealing plug is formed with A first cavity, the emitting part is located in the first cavity and arranged on the first circuit board; and the light receiving device includes a second sealing plug, a receiving part and a second circuit board, the first Two sealing plugs are installed on the second circuit board, the second sealing plug is formed with a second inner cavity, and the receiving portion is located in the second inner cavity and arranged on the second circuit board. In this way, the transmitting part and the receiving part are located in the inner cavity, which can reduce the adverse effects of oil fume particles on the transmitting part and the receiving part, and prolong the service life of the transmitting part and the receiving part.

In some embodiments, the light emitting device includes a first sealing plug, an emitting portion, and a first circuit board, the first sealing plug is mounted on the first circuit board, and the first sealing plug is formed with In the first cavity, the emitting part is located in the first cavity and arranged on the first circuit board; or the light receiving device includes a second sealing plug, a receiving part and a second circuit board, and the first Two sealing plugs are installed on the second circuit board, the second sealing plug is formed with a second inner cavity, and the receiving portion is located in the second inner cavity and arranged on the second circuit board. In this way, the transmitting part or the receiving part is located in the inner cavity, which can reduce the adverse effect of oil fume particles on the transmitting part or the receiving part, and prolong the service life of the transmitting part or the receiving part.

In some embodiments, a first paraboloid is formed at one end of the first inner cavity, and the emitting portion is located at a focal position of the first paraboloid. In this way, the efficiency of light emitted by the emitting part can be improved.

In some embodiments, a second paraboloid is formed at one end of the second inner cavity, and the receiving portion is located at a focal position of the second paraboloid. In this way, the light receiving efficiency of the receiving unit can be improved.

In some embodiments, the light emitting device includes a first lens disposed in the first cavity and located on the light path of the emitting part, and the first lens is used to The light rays emitted by the emitting part are emitted in parallel. In this way, the efficiency of light emitted by the emitting part can be improved.

In some embodiments, the light receiving device includes a second lens disposed in the second cavity and located on the receiving light path of the receiving part, and the second lens is used to The light rays entering from the second inner cavity converge to the receiving part. In this way, the light receiving efficiency of the receiving unit can be improved.

In some embodiments, the inner wall of the first inner cavity is provided with a first shielding portion at the front end of the emitting portion. In this way, the adverse effect of the oil fume particles on the emission part is further reduced, and the service life of the emission part is prolonged.

In some embodiments, the inner wall of the second inner cavity is provided with a second shielding portion at the front end of the receiving portion. In this way, the adverse effect of the oil fume particles on the receiving part is further reduced, and the service life of 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 to the first shielding portion. In this way, the condensed material in the inner cavity can flow away smoothly through the oil guide groove, avoiding the accumulation of condensed material and affecting the service life of the transmitting part and the receiving part.

In some embodiments, the inner wall of the second inner cavity is provided with a second oil guide groove connected to the second shielding portion. In this way, the condensed material in the inner cavity can flow away smoothly through the oil guide groove, avoiding the accumulation of condensed material and affecting the service life of the transmitting part and the receiving part.

In some embodiments, the light emitting device includes a first sealing plug, one end of the first sealing plug is provided with a transmitting opening, and the light receiving device includes a second sealing plug, one end of the second sealing plug A receiving opening is provided, and the diameter of the receiving opening is larger than the diameter of the emitting opening. In this way, the receiving part can increase the reception of light and improve the sensitivity of the oil smoke detection assembly.

In some embodiments, the kitchen appliance includes a first fixing part and a second fixing part, the first fixing part fixes the light emitting device, and the second fixing part fixes the light receiving device. In this way, the first fixing part functions to fix and protect the light emitting device, and the second fixing part functions to fix and protect the light receiving device.

In some embodiments, the kitchen appliance includes a check valve, and the first fixing part, the second fixing part and the check valve are an integral structure or a separate structure. In this way, the cost of kitchen equipment can be reduced.

In some embodiments, the kitchen appliance includes a check valve, a first sealing plug, and a second sealing plug. The check valve is provided with a first through hole and a second through hole, and the first sealing plug is partially provided with a first through hole and a second through hole. In the first through hole, the second sealing plug is partially disposed in the second through hole. In this way, it is beneficial to realize the installation of the first sealing plug and the second sealing plug.

In some embodiments, the check valve includes a first convex ring protruding from the inner wall of the first through hole. In this way, it is possible to reduce the adverse effect of oil fume particles on the launching part.

In some embodiments, the check valve includes a second convex ring protruding from the inner wall of the second through hole. In this way, it is possible to reduce the adverse effect of oily smoke particles on the receiving part.

In some embodiments, the kitchen device includes a check valve and a wire protection structure provided on the outer wall of the check valve, and the oily smoke detection assembly includes a wire connecting the light emitting device and the light receiving device , Part of the wire is contained in the wire protection structure. In this way, the wire protection structure can protect the wire and increase the service life of the oil smoke detection component.

In some embodiments, the kitchen appliance includes a protective member and a wiring member, the protective member and the wiring member are installed in a box, and the protective member connects the wire protection structure and the wiring member. The protector contains a wire between the wire protection structure and the wiring member, and the wire extends into the wiring member. In this way, it protects the wire.

The additional aspects and advantages of the embodiments of the present application will be partly given in the following description, and part of them will become obvious from the following description, or be understood through the practice of the embodiments of the present application.

Description of the drawings

Fig. 1 is a schematic structural diagram of a kitchen appliance according to an embodiment of the present application.

Fig. 2 is another schematic diagram of the structure of the kitchen appliance according to the embodiment of the present application.

Fig. 3 is a schematic diagram of another structure of the kitchen appliance according to the embodiment of the present application.

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

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

Fig. 6 is an enlarged view of part I of Fig. 5.

Fig. 7 is an enlarged view of part II of Fig. 5.

FIG. 8 is a schematic diagram of the structure of the oil smoke detection assembly according to the embodiment of the present application.

FIG. 9 is another schematic diagram of the structure of the oil smoke detection assembly according to the embodiment of the present application.

Fig. 10 is a diagram showing the relationship between the intensity of light received by the light receiving device of the kitchen appliance and the time according to the embodiment of the present application.

FIG. 11 is another schematic diagram of the structure of the oil smoke detection assembly according to the embodiment of the present application.

Fig. 12 is another diagram of the relationship between the light intensity and time received by the light receiving device of the kitchen appliance according to the embodiment of the present application.

Fig. 13 is a schematic structural diagram of a first sealing plug according to an embodiment of the present application.

Symbol description of main components:

Kitchen device 100, baffle assembly 10, touch button 12, cabinet 20, top 22, fan assembly 30, volute 32, air outlet 320, air outlet 321, fan 34, check valve assembly 410, check Valve 40, first through hole 401, second through hole 402, oily smoke detection assembly 50, light emitting device 52, first fixing portion 521, emitting portion 522, first convex ring 524, emitting opening 5282, drain hole 529, light The 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 first end surface 5621, the second end surface 5623, The second sealing plug 564, the second inner cavity 5642, the third end surface 5641, the fourth end surface 5643, the first shielding portion 510, the first oil retaining ring 506, the second shielding portion 520, the second oil retaining ring 508, the first Oil guide groove 507, second oil guide groove 509, first light guide hole 5652, second light guide hole 5654, first parabola 5672, second parabola 5674, first circuit board 551, second circuit board 552, first lens 57 , The second lens 58, the protective wire structure 60, the protective member 70, the wiring member 80, the wiring port 82, and the housing 84.

detailed description

The implementation of the present application will be further described below in conjunction with the accompanying drawings. The same or similar reference numerals in the drawings indicate the same or similar elements or elements with the same or similar functions throughout.

In addition, the implementation manners of the present application described below in conjunction with the drawings are exemplary, and are only used to explain the implementation manners of the application, and should not be construed as limiting the application.

In this application, unless expressly stipulated and defined otherwise, the first feature “on” or “under” the second feature may be in direct contact with the first and second features, or the first and second features may be indirectly through an intermediary. contact. Moreover, the "above", "above" and "above" of the first feature on the second feature may mean that the first feature is directly above or diagonally above the second feature, or it simply means that the level of the first feature is higher than the second feature. The “below”, “below” and “below” of the second feature of the first feature may be that the first feature is directly below or obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

Please refer to FIG. 1, which shows a schematic structural diagram of a kitchen device 100 according to an embodiment of the present application. In the example of FIG. 1, the kitchen device 100 is a top-row kitchen device 100. It can be understood that, in other embodiments, the kitchen device 100 may be a bottom-row kitchen device 100 or a side-row kitchen device 100, etc., which is not limited herein. Hereinafter, the kitchen apparatus 100 is used as an example of the upper-row kitchen apparatus 100 for detailed description. Specifically, the kitchen device 100 includes, but is not limited to, electric appliances with a function of exhausting oil and fume, such as an oil-absorbing device, an integrated stove, and the like. In the illustrated embodiment, the kitchen appliance 100 is described by taking an oil fume absorbing device as an example. The oil fume absorbing equipment can be a frequency conversion oil fume absorbing equipment.

The kitchen appliance 100 of the embodiment of the present application includes a deflector assembly 10, a box body 20, and a check valve assembly 410. The check valve assembly 410 includes a check valve 40. The box body 20 is arranged on the deflector assembly 10, and the deflector assembly 10 The board assembly 10 includes a touch button 12. After the touch button 12 is triggered, the kitchen device 100 is turned on, and the oil fume particles 110 can enter the box 20 from the baffle assembly 10. The box 20 is provided with a fan assembly 30, and the fan assembly 30 includes a volute 32 and a fan 34 arranged in the volute 32. The oil fume particles 110 enter into the volute 32 by the centrifugal force of the impeller of the fan 34, and the oil fume particles 110 can be discharged from the air outlet 321 of the volute 32. The check valve 40 is connected to the top 22 of the box body 20 and connected to the air outlet 321 of the volute 32. The oil fume particles 110 may be discharged from the air outlet 321 of the volute 32 and then discharged into the smoke pipe or flue through the check valve 40. The kitchen device 100 of this embodiment can be applied to a frequency conversion range hood.

It can be understood that the non-return valve 40 refers to a valve whose opening and closing member is a circular valve flap and is operated by its own weight and medium pressure to block the back flow of the medium. The check valve 40 may be a lift check valve and a swing check valve. In this embodiment, the oil fume particles 110 are discharged from the air outlet 321 of the volute 32 and enter the check valve 40. When the pressure at the inlet of the check valve 40 is greater than the sum of the weight of the disc of the check valve 40 and its rotation resistance , The valve of the check valve 40 is opened. When the soot particles 110 flow back, the valve of the check valve 40 is closed.

The kitchen device 100 of the embodiment of the present application includes an oily smoke detection component 50, and the oily smoke detection component 50 is provided on the check valve 40. In the illustrated embodiment, the oily smoke detection assembly 50 is provided on the outer wall of the check valve 40. The oil smoke detection assembly 50 may be provided on the inner wall of the check valve 40. In the example of FIG. 1, the oil smoke detection component 50 is provided on the outer wall of the check valve 40 and is used to detect the oil smoke concentration of the oil smoke duct in the check valve 40.

In this embodiment, the oil fume detection assembly 50 is arranged in the oil fume air duct downstream of the fan 34. In the illustrated embodiment, the oil fume detection assembly 50 can be arranged on the inner wall or the outer wall of the air outlet duct 320 of the volute 32. In the example of FIG. 3, the oil fume detection assembly 50 may be arranged on the outer wall of the volute 32 and used to detect the oil fume concentration of the oil fume air duct in the volute 32. The two detected oil smoke concentrations can be the average of the two as the oil smoke concentration for controlling the air volume of the fan 34, or the two detected oil smoke concentrations can be assigned different weights or ratios to calculate the oil smoke concentration for controlling the air volume of the fan 34 . In other embodiments, the oily smoke detection assembly 50 is provided in the check valve 40 or the volute 32.

Specifically, the oil smoke detection component 50 may be an infrared detection component or a laser detection component, etc., which is not limited herein. The following embodiments are described in detail by taking the oil smoke detection component 50 as the infrared detection component.

Please refer to FIG. 3, the oil smoke detection assembly 50 includes a light emitting device 52 and a light receiving device 54. The kitchen device 100 includes an oil fume duct located downstream of the fan 34. The oil fume detection assembly 50 is arranged in the oil fume air duct downstream of the fan 34. In the illustrated embodiment, the oil fume air duct downstream of the fan 34 includes the air outlet 320 of the volute and the oil fume air duct in the check valve 40. The light emitting device 52 is used to emit light to the oil fume duct of the air outlet duct 320 of the stop volute 32, and to the oil fume duct in the check valve 40, and the light receiving device 54 is used to receive the light emitted by the light emitting device 52. Light and output electrical signals according to the received light. Generally, the particle size of the oil fume particles 110 ranges from 100 nm to 10 um. In one embodiment, when the oil fume particles 110 pass through the light path of the infrared light emitted by the light emitting device 52, they can block, scatter and diffract the infrared light, that is, the oil fume particles 110 in the oil fume duct will affect the light. The receiving device 54 receives the intensity of the light emitted by the light emitting device 52 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 suitable air volume. The effect of sucking oil fume particles 110 and sucking oil fume particles 110 is good and the accuracy is high.

Controlling the operation of the fan 34 can be understood as controlling the air volume of the fan 34, and the air volume of the fan 34 is related to the speed of the fan 34. In an example, the corresponding relationship between the concentration of oil fume and the air volume of the fan can be established by simulating a scenario where the kitchen device 100 is actually used, and the concentration of oil fume can be calibrated by the electrical signal output by the light receiving device 54. By adjusting the rotation speed of the fan 34 to achieve a corresponding air volume, the effect of oil fume absorption can be improved.

In this embodiment, the central axis E of the air outlet 321 of the volute 32 is located between the light receiving device 54 and the rotation axis F of the impeller of the fan 34. In the example of FIG. 3, the center axis E of the air outlet 321 of the volute 32 is on the left side of the rotation axis F of the impeller of the fan 34 (the impeller rotation axis F of FIG. 3 is perpendicular to the paper), and the light receiving device 54 is located On the left side of the air outlet 321 of the volute 32, most of the oil fume particles will be discharged from the left side of the air outlet 321 of the volute 32 due to the effect of the centrifugal force of the impeller of the fan 34 by the oil fume particles 110, and the air outlet 321 of the volute 32 The concentration of oil fume particles 110 on the left side of the volute 32 and the left side of the check valve 40 is relatively high, while the concentration of oil fume particles 110 on the right side of the air outlet 321 of the volute 32 and the right side of the check valve 40 is low. Therefore, in the example of FIG. 3, the light receiving device 54 is placed on the left side of the air outlet of the volute and the left side of the check valve 40. In this way, when the concentration of the oil fume particles in the oil fume air duct changes slightly, the light intensity received by the light receiving device 54 may change significantly, that is, the sensitivity of the oil fume detection assembly 50 is improved. It can be understood that in other embodiments, the center axis of the air outlet 321 of the volute 32 may also be located between the light emitting device 52 and the rotation axis of the impeller of the fan 34.

In the example of FIGS. 9 and 11, the center axis E of the air outlet 321 of the volute 32 (in FIGS. 9 and 11, the center axis E is perpendicular to the paper) is perpendicular to the dotted line E1, and the dotted line E1 is perpendicular to the rotation of the impeller. The axis F is parallel. The dotted line E1 divides the check valve 40 into two left and right areas. The light receiving device 54 can be placed at any position in the circumferential direction of the check valve 40 on the left side of the dotted line E1, and the light emitting device 54 can be placed on the right side of the dotted line E1. Any position in the circumferential direction of the check valve 40 on the side. In the example of FIG. 9, the light receiving device 54 is located on the left side of the check valve 40 on the left side of the broken line E1, and the light emitting device 52 and the light receiving device 54 are located on the same straight line T.

In the example of FIG. 11, the light receiving device 54 is located at the lower left of the check valve 40 on the left side of the dotted line E1, the light emitting device 52 and the light receiving device 54 are located on different straight lines, and the light emitting device 52 and the light receiving device 54 are located between The formed angle is α, where α can be 120 degrees, or other degrees.

Regarding the oil fume detection assembly 50 arranged on the volute 32, the specific position of the light receiving device 54 can also refer to the specific position of the oil fume detection assembly 50 arranged on the check valve 40, and will not be expanded in detail here.

Please refer to FIG. 4, in the example of FIG. 4, the kitchen device 100 further includes a fixed part arranged on the outer wall of the check valve 40 and spaced apart, and the light emitting device 52 and the light receiving device 54 are installed at the fixed part spaced apart. Specifically, the fixing portion includes a first fixing portion 521 and a second fixing portion 541 spaced apart, the light emitting device 52 is installed on the first fixing portion 521, and the light receiving device 54 is installed on the second fixing portion 541.

In the illustrated embodiment, the fixing portion and the check valve 40 are an integral structure, that is, the first fixing portion 521 and the second fixing portion 541 and the check valve 40 are an integral structure. In this way, the manufacturing of the fixing part and the check valve 40 can be made simpler.

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 and the check valve 40 are separate structures. In this way, the oil fume detection assembly 50 can be applied to different types of check valves 40, and the original oil fume detection assembly 50 and other components can be used to reduce the reconstruction cost of the check valve 40 and improve the efficiency. Specifically, the first fixing portion 521 and the second fixing portion 541 may be connected to the check valve 40 in the form of screws, snaps, or glue.

It should be noted that the first fixing part 521 and the second fixing part 541 can be arranged as an integral structure or a separate structure according to the actual requirements of the kitchen device 100, which is not specifically limited herein.

In the example of FIGS. 1 and 4, the kitchen device 100 includes a wire protection structure 60 provided on the outer wall of the check valve 40, and the oily smoke detection assembly 50 includes a wire (not shown) connecting the light emitting device 52 and the light receiving device 54, Part of the wire is contained in the wire protection structure 60. In this way, the wire protection structure 60 can protect the wire and increase the service life of the oil smoke detection assembly 50.

Specifically, the protective wire 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 and instructions. The wire includes 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. Part of the first wire and part of the second wire are accommodated in the wire protection groove opened in the wire protection cavity 62. The wire protection cover 61 covers the wire protection groove to form an opposite Confined space. The two ends of the wire protection cover 61 can be connected to the first fixing portion 521 and the second fixing portion 541 by means of snapping, screw fixing, etc., respectively. In addition, multiple wires can form a wire bundle, which facilitates the arrangement of the wires.

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

In another embodiment, the first fixing portion 521, the second fixing portion 541, and the grommet cavity 62 are separate structures. Specifically, the wire protection 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 in the form of a screw, a buckle, or glue.

In the examples shown in FIGS. 1, 2, 4, and 5, the kitchen device 100 further includes a protector 70 and a connecting piece 80. The protector 70 and the connecting piece 80 are installed on the box body 20, and the protector 70 is connected to the check valve 40. In addition to the wiring member 80, the protective member 70 contains a wire between the wire protection structure 60 and the wiring member 80, and the wire is connected to the wiring member 80.

Specifically, the protective member 70 and the connecting member 80 are installed on the top 22 of the box body 20. The material of the connecting member 80 may be metal or plastic, and the material of the protective member 70 may be plastic. Please refer to FIG. 2, the wiring member 80 includes a wiring port 82 and a housing 84, and the wire is inserted into the housing 84 through the wiring port 82. The wiring member 80 further includes an electric control board (not shown in the figure), and the electric control board is arranged in the housing 84. The electric control board includes electrical components such as a controller (such as MCU or single-chip microcomputer), a transformer, etc. The electrical signal output by the oil fume detection component 50 can be transmitted to the controller through a wire, and the controller can analyze the concentration and distribution characteristics of the oil fume particles 110 according to the electrical signal , And control the air volume of the kitchen device 100 according to the concentration and distribution characteristics of the oil fume particles 110. The transformer is used to supply power to various electrical equipment including the oil smoke detection assembly 50. In an example, the protective member 70 may be a protective box, and the wiring member 80 may be a junction box.

Generally, according to the requirements of safety regulations, the wires exposed to the outside need to be able to withstand a tensile test of at least 100N. Therefore, the wires of the oil smoke detection assembly 50 are required to be protected by the wire protection structure 60 and the protective member 70. The packaging scheme of kitchen appliance products is generally to separate and package the check valve assembly 410 (including the check valve 40 and various parts and components including the oil smoke detection assembly 50 installed on the check valve 40) from the box body 20. After-sales door-to-door installation is performed. In order to reduce the workload of after-sales, a quick release structure of the check valve assembly 410 and the press box 80 needs to be designed.

Specifically, the check valve assembly 410 is fixed on the top 22 of the box body 20, and after the wire protection structure 60 is fixed by buckles or screws, the wire connecting the light emitting device 52 and the light receiving device 54 can be covered for protection effect. After the after-sales personnel or other personnel connect the check valve assembly 410 and the connection piece 80 through the wiring port 82, they gather the excess length of the wire bundle into the protector 70, and then connect the check valve assembly 410 and the box 20 by means of screws or the like. The top (such as the top plate of the box 20).

In the embodiments of the present application, please refer to FIGS. 4 and 5. FIG. 5 is a cross-sectional view of the check valve assembly of FIG. 4 along the line L-L, and the perspective of the cross-sectional view shown in FIG. 5 is a plane cross-sectional view. Both the light emitting device 52 and the light emitting device 52 include a sealing plug and a circuit board. Wherein, referring to FIGS. 6 and 7, the sealing plug of the light emitting device 52 is the first sealing plug 562. The sealing plug of the light receiving device 54 is the second sealing plug 564, the circuit board of the light emitting device 52 is the first circuit board 551, and the circuit board of the light receiving device 54 is the 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 part 522, the first sealing plug 562 is formed with a first inner cavity 5622, and the emitting part 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.

After the first sealing plug 562 and the first circuit board 551 are matched and pressed together, a first inner cavity 5622 with an open end is formed. After the second sealing plug 564 and the second circuit board 552 are matched and pressed together, a second inner cavity 5642 with an open end is formed. The material of the sealing plug can be soft materials such as rubber or silica gel. In an example, the ratio of the depth of the inner cavity to the hole diameter is greater than or equal to 6, and the proportion of the oil fume particles 110 diffusing into the holes can be controlled to be less than 1%.

Referring to Figures 5, 6 and 7, the check valve 40 is provided with a first through hole 401, and the first sealing plug 562 is partially provided in the first through hole 401, for example, by interference fit. Inside the through hole 401. The check valve 40 is provided with a second through hole 402, and the second sealing plug 564 is partially arranged in the second through hole 402, for example, in the second through hole 402 by means of interference fit.

Please refer to FIGS. 6 and 7, the check valve 40 further includes a first convex ring 524 protruding from the inner wall of the first through hole 401. The first convex ring 524 can block the soot particles 110 from entering the first inner cavity 5622, and the first convex ring 424 is provided with an emission opening 5282 to facilitate the emission of light. The check valve 40 includes a second convex ring 544 protruding from the inner wall of the second through hole 402. The second convex ring 544 is provided with a receiving opening 5482 to facilitate the entry of light. The second convex ring 544 can block the oil smoke particles 110 from entering the second inner cavity 5642.

The emission part 522 includes an infrared emission tube. The receiving part 542 includes an infrared receiving tube. The transmitter 522 can emit infrared light, and the receiver 542 can receive the infrared light emitted by the transmitter 522, and output a corresponding electrical signal according to the received infrared light, and the corresponding electrical signal can be transmitted to the electronic control via the second circuit board 552 The controller of the board.

In the example of FIG. 6, the inner wall of the first inner cavity 5622 is provided with a first shielding portion 510 located at the front end of the emitting portion 522. Specifically, the first shielding portion 510 is formed with a first oil baffle ring 510, and the first oil baffle ring 510 is annularly protruded on the inner wall of the first inner cavity 5622. The number of the first oil baffle ring 506 is multiple, and the plurality of first oil baffle rings 506 are arranged along the length direction of the first sealing plug. In the example of FIG. 7, the inner wall of the second inner cavity 5642 is provided with a second shielding portion 520 located at the front end of the receiving portion 542. Specifically, the second shielding portion 520 is formed with a second oil baffle ring 508, and the second oil baffle ring 508 is annularly protruded on the inner wall of the second inner cavity 5642. The number of the second oil baffle ring 508 is multiple, and the plurality of second oil baffle rings 508 are arranged along the length direction of the second sealing plug.

When the oil fume particles enter the first inner cavity 5622 due to air fluctuations, the oil fume particles 110 will be blocked by the first shielding portion 510 adsorbed on the first inner cavity 5622 to reduce pollution to the emitting portion 522. For the first oil baffle ring 508, the groove of the first oil baffle ring 506 absorbs air fluctuations, and the oil smoke particles 110 are further intercepted by the first oil baffle ring 506. Therefore, the first oil baffle ring 506 can further improve the resistance to oil smoke particles. The shielding effect of 110 further prevents oil fume particles 110 from polluting the launching part 522 and affecting the service life of the launching part 522.

When the oil fume particles 110 enter the second inner cavity 5642 due to air fluctuations, the oil fume particles 110 will be blocked by the second shielding portion 520 adsorbed on the second inner cavity 5642 to reduce pollution to the receiving portion 542. For the second oil baffle ring 508, the groove of the second oil baffle 508 absorbs air fluctuations, and the oil smoke particles 110 are further intercepted by the second oil baffle ring 508. Therefore, the second oil baffle ring 508 can further improve the resistance to oil smoke particles. The shielding effect of 110 further prevents oil fume particles from polluting the receiving part 542 and affecting the service life of the receiving part 542.

It should be noted that in other embodiments, the first shielding portion 510 may include other shielding structures, for example, bumps, protrusions, recesses and other structures on the inner wall of the first inner cavity 5622, that is, the first The provision of a shielding portion 510 increases the area of the inner wall of the first inner cavity 5622, thereby increasing the probability of the oil smoke particles being attached. The second shielding portion 520 may include other shielding structures, for example, bumps, protrusions, recesses and other structures on the inner wall of the second inner cavity 5642, that is, the second shielding portion 520 is arranged so that the second inner cavity 5642 The area of the inner wall increases, thereby increasing the probability of oil fume particles being attached.

In the examples of FIGS. 6, 7 and 13, the inner wall of the first inner cavity 5622 is provided with a first oil guide groove 507, and the first oil guide groove 507 is connected to the first shielding portion 510. When the oil fume particles 110 enter the first inner cavity 5622 due to air fluctuations, the oil fume particles 110 will be adsorbed on the inner wall of the first inner cavity 5622 to form condensate, which can pass through the first oil guide groove 507 at the bottom of the first sealing plug 562 Outflow. The first oil guide groove 507 is an elongated hole with a circular or square cross-section. Preferably, the opening of the first oil guide groove 507 is lower than the inside of the first inner cavity 5622, that is, the first oil guide groove 507 is far away from the launcher. The direction of the portion 522 is inclined downward to facilitate the flow of liquid. The opening of the first oil guide groove 507 can also be parallel to the first inner cavity 5622 to allow the liquid to flow out by itself. The side length or diameter of the first oil guide groove 507 needs to be greater than or equal to 2.5 mm (preferably, greater than or equal to 3 mm) to overcome the internal tension of the liquid and facilitate the liquid to flow out.

In an example, the first sealing plug 562 is cylindrical, the outer diameter of the first sealing plug 562 is 20-25 mm, the inner diameter is 5-10 mm, the depth of the first oil baffle ring 506 is 5-10 mm, and the depth of the first oil guide groove 507 3～5mm, the first oil baffle ring 506 is annular, the number of the first oil baffle ring 506 is multiple, and the multiple first oil baffle rings 506 are arranged in sequence along the length direction of the first sealing plug 562, two adjacent to each other. The depth of the gap between the first oil baffle rings 506 is the same. It should be pointed out that the numerical values and numerical ranges mentioned in the above examples and implementations are to illustrate the implementation of this application, and should not be construed as limitations on this application. The above numerical values and numerical ranges can be determined according to actual design parameters. Adjustment. The numerical values and numerical ranges mentioned in other places in this article should be understood according to the instructions there. In other examples, the first sealing plug 562 may also have a regular or irregular rated shape such as a rectangular parallelepiped shape and a cube shape, which is not specifically limited herein.

In the example of FIGS. 6 and 7, both the first convex ring 524 and the second convex ring 544 are provided with a drain hole 529. The drain hole 529 is in communication with the corresponding oil guide groove, and the dirt flowing into the oil guide groove can be discharged from the drain hole. 529 discharges the first sealing plug 562 and the second sealing plug 564.

In the example of FIG. 7, the inner wall of the second inner cavity 5642 is provided with a second oil guide groove 509. The second oil guide groove 509 is connected to the second shielding portion 520. When the oil fume particles 110 enter the second inner cavity 5642 due to air fluctuations, the oil fume particles 110 will be adsorbed on the inner wall of the second inner cavity 5642 to form condensate, which can pass through the second oil guide groove 509 at the bottom of the second sealing plug 564 Outflow. The second oil guide groove 509 is an elongated hole with a circular or square cross-section. Preferably, the opening of the second oil guide groove 508 is lower than the inside of the second inner cavity 5642, that is, the second oil guide groove 509 is far away from the receiving The direction of the portion 542 is inclined downward to facilitate the flow of liquid. The opening of the second oil guide groove 509 can also be parallel to the second inner cavity 5642 to allow the liquid to flow out by itself. The side length or diameter of the second oil guide groove 509 needs to be greater than or equal to 2.5 mm (preferably, greater than or equal to 3 mm) to overcome the internal tension of the liquid and facilitate the liquid to flow out.

In this embodiment, the central axis of the light emitting device 52 and the central axis of the light receiving device 54 intersect the central axis of the fume duct downstream of the fan. The oil fume air duct downstream of the fan includes the oil fume air duct of the check valve 40 and the air outlet 320 of the volute. Please refer to FIGS. 8 and 9. In the examples of FIGS. 8 and 9, the central axis of the light emitting device 52 and the central axis of the light receiving device 54 are located on the same straight line T and intersect the central axis Z of the check valve 40. In this way, the installation of the oil smoke detection assembly 50 is realized. The central axis of the first cavity 5622, the central axis of the second cavity 5642, the central axis of the light emitting device 52 and the central axis of the light receiving device 54 coincide, and are all on the same straight line T.

Specifically, in the example of FIG. 3, the air outlet of the check valve 40 is circular, and the central axis Z of the oil fume duct of the check valve 40 can refer to the plane perpendicular to the plane of the oil fume duct of the check valve 40 and passes through the center of the circle.的轴。 The axis. In other examples, the oil fume duct of the check valve 40 may have other regular or irregular shapes, such as a square, an ellipse, a regular polygon, and a triangle. For a square, the central axis Z of the oil fume duct of the check valve 40 refers to an axis perpendicular to the plane of the oil fume duct of the check valve 40 and passing through the intersection of the diagonals of the square. For an ellipse, the central axis Z of the oil fume duct of the check valve 40 may refer to an axis perpendicular to the plane of the oil fume duct of the check valve 40 and passing through any focal point of the ellipse. For a regular polygon, the central axis Z of the oil fume duct of the check valve 40 may refer to an axis perpendicular to the plane of the oil fume duct of the check valve 40 and passing through the circumscribed circle center or inscribed circle center of the regular polygon. For other irregular shapes, the central axis Z of the oil fume duct of the check valve 40 may refer to the plane perpendicular to the plane of the oil fume duct of the check valve 40 and pass through the irregular shape to circumscribe the largest circle center or inscribe the smallest circle center Axis etc. In the present application, the central axis of the air outlet channel 320 of the volute can also be understood similarly according to the above description.

Further, one end of the first sealing plug 562 is provided with a transmitting opening 5282, and the second sealing plug 564 is provided with a receiving opening 5482. The diameter of the receiving opening 5482 is larger than the diameter of the transmitting opening 5282. In this way, the area of the light receiving area of the light receiving device 54 can be increased.

In the example of FIG. 8, the first sealing plug 562 includes a first end surface 5621 and a second end surface 5623, the emitting portion 522 is close to the second end surface 5623, and the second sealing plug 564 includes a third end surface 5641 and a fourth end surface 5643, and the receiving portion 542 is close to the fourth end surface 5643, the diameter of the transmitting opening 5282 and the diameter of the receiving opening 5482 satisfy the relationship: d2≥(d1×(L1+L))/(1.414×L1), where d1 is the diameter of the transmitting opening 5282, d2 is the diameter of the receiving opening 5482, L1 is the distance from the emitting portion 522 to the first end surface 5621, and L is the distance from the first end 5621 surface to the third end surface 5641. In this way, the light receiving device 54 can better receive the light emitted by the light emitting part 522.

Specifically, referring to FIG. 8, the angle of the light emitted by the light emitting portion 522 is restricted by the size d1 of the emitting opening 5282 of the first sealing plug 562. When the light emitted by the light emitting portion 522 reaches the light receiving portion 542, the light spot diameter Will be enlarged to d. In order to ensure that the intensity of the light received by the light receiving part 542 is sufficient, it is satisfied that the aperture area of the receiving opening 5482 ≥ half the spot area, that is, π(d2) ² ≥ 0.5×πd ² , in this example, it is known that L, L1, d1, can be calculated: d=d1×(L+L1)/L1, according to the light propagation mode shown in the figure, that is, this example needs to satisfy d2≥(d1×(L1+L))/(1.414×L1). The conditions of this embodiment can be used for the design when the light emitting device 52 and the light receiving device 54 have no lenses inside.

In the example of FIGS. 8 and 9, the central axis of the light emitting device 52 and the central axis of the light receiving device 54 are located on the same straight line T on a plane perpendicular to the central axis Z of the check valve, and the light emitting device 52 and the light receiving device 54 They are respectively provided on the left and right sides of the check valve 40. The center axis Z of the check valve 40 in FIG. 11 is perpendicular to the paper surface.

In another embodiment, the center axis of the light emitting device 52 and the center axis of the light receiving device 54 are located on the same straight line inclined with respect to a plane perpendicular to the center axis Z of the check valve 40. For example, the central axis of the light emitting device 52 and the central axis of the light receiving device 54 are on the same straight line inclined by 10 degrees, 20 degrees or 30 degrees with respect to the plane of the center axis Z of the vertical check valve 40, and the inclination angle is not limited here. .

The light receiving device 54 and the light emitting device 52 shown in FIG. 9 are respectively arranged on the left and right sides of the check valve 40, and can also be horizontally rotated at any angle in the installation position shown in the figure, for example, they can be arranged on the front and back of the check valve 40. Side or other orientation. The light emitting device 52 can emit light (such as infrared light), passing through the oil fume air duct area of the check valve 40, and being received by the opposing light receiving device 54. When there is no particulate matter in the air duct area, the detecting light of the light receiving device 54 The strength basically remains unchanged, that is, the value of the output electrical signal (such as the voltage value) is basically unchanged.

The oil fume particles are acted by the centrifugal force of the impeller, and reach the oil fume air duct of the check valve 40 through the volute 32. The oil fume particles 110 pass through the light path, causing occlusion, scattering, and diffraction of the light. The occlusion of large-diameter particles has a greater impact on the light intensity, causing the received light intensity of the light receiving device 54 to weaken. When the oil fume is reduced, the shielding effect is weakened, and the light intensity received by the light receiving device 54 is increased. The value of the electrical signal can be used to characterize the light intensity. For example, the light receiving device 54 receives the light and outputs an electrical signal. The electrical signal is converted from analog to digital to obtain a digital signal. The digital signal can obtain a corresponding value, such as a voltage value.

In one embodiment, referring to FIG. 10, during the static stage of cooking, no oily smoke particles 110 are generated at this time, and the intensity of the light received by the light receiving device 54 remains basically unchanged. During the heating phase of cooking, oil fume particles 110 begin to be generated, and the intensity of the light received by the light receiving device 54 gradually decreases. During the cooking stage, the concentration of oily smoke particles 110 increases rapidly, and the intensity of light received by the light receiving device 54 decreases rapidly. In the stir-frying stage of cooking, the concentration of the oily smoke particles 110 fluctuates and the concentration is relatively large, and the light intensity received by the light receiving device 54 also fluctuates and the light intensity is relatively small. In the off-fire stage of cooking, the concentration of the oily smoke particles 110 decreases rapidly, and the intensity of the light received by the light receiving device 54 increases rapidly.

11, in the embodiment of FIG. 11, the central axis T1 of the light emitting device 52 and the central axis T2 of the light receiving device 54 intersect the central axis of the check valve 40 in the vertical direction, and the central axis of the light emitting device 52 The range of the angle α formed by intersecting the central axis of the light receiving device 54 is (0°, 180°).

Specifically, in one embodiment, referring to FIG. 11, the plane formed by the central axis of the light emitting device 52 and the central axis of the light receiving device 54 is parallel to a plane perpendicular to the central axis Z of the check valve 40, or coincides with the plane . The angle α formed by the intersection of the central axis of the light emitting device 52 and the central axis of the light receiving device 54 is less than 180 degrees.

In other embodiments, the plane formed by the center axis of the light emitting device 52 and the center axis of the light receiving device 54 may also be inclined with respect to a plane perpendicular to the center axis Z of the check valve 40. The angle of inclination can be set according to actual needs, and is not limited here. The angle formed by the intersection of the central axis of the light emitting device 52 and the central axis of the light receiving device 54 is less than 180 degrees.

In the example of FIG. 11, the light emitting device 52 and the light receiving device 54 are staggered to form an included angle α, and the light emitted by the light emitting device 52 can pass through the inner area of the check valve 40 and be scattered by the soot particles 110. So that the light can be received by the light receiving device. According to the meter-type scattering theory, when the light emitting device 52 and the light receiving device 54 are staggered to form a preset angle α, when there is no oily smoke particles 110 in the inner area of the check valve 40, almost no infrared light is received by the light receiving device 54. When received, the intensity of the light received by the light receiving device 54 is very weak. When there are oil fume particles 110 in the inner area of the check valve 40, the infrared light emitted by the light emitting device 52 is scattered by the oil fume particles 110 to the infrared light, and part of the infrared light will be received by the light receiving device 54 and the light receiving device 54 The received light intensity is strong.

Please refer to FIG. 12. In the example of FIG. 12, during the static stage of cooking, no oily smoke particles 110 are generated at this time, and the intensity of light received by the light receiving device 54 is relatively weak and remains basically unchanged. During the heating phase of cooking, oil fume particles 110 begin to be generated, and the intensity of the light received by the light receiving device 54 gradually increases. During the cooking stage, the concentration of oily smoke particles 110 increases rapidly, and the intensity of light received by the light receiving device 54 increases rapidly. During the stir-frying stage of cooking, the concentration of oily smoke particles 110 fluctuates and the concentration is greater, and the light intensity received by the light receiving device 54 also fluctuates and the light intensity is greater. In the off-fire stage of cooking, the concentration of oily smoke particles 110 decreases rapidly, and the intensity of light received by the light receiving device 54 decreases rapidly.

In FIGS. 9 and 11, the light emitting device 52 includes a first lens 57 disposed in the first inner cavity 5622 and located on the light path of the emitting part 522, and the first lens 57 is used to connect the emitting part 522 The emitted light rays are emitted in parallel. In this way, basically all the light emitted by the emitter 522 can be guided into the oil fume duct of the check valve 40, and the sensitivity of the oil fume detection assembly 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 parallel light beams and emit them.

The light receiving device 54 includes a second lens 58, which is disposed in the second cavity 5642 and located on the receiving light path of the receiving portion 542. The second lens 58 is used to converge the light entering from the second cavity 5642 to受部542。 Receiving section 542. In this way, the light entering the second inner cavity 5642 can basically be collected to the receiving part 542, which further improves the sensitivity of the oil smoke detection assembly 50.

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

Further, one end of the first inner cavity 5622 is formed with a first parabolic surface 5672, and the emitting portion 522 is located at the focal position of the first parabolic surface 5672, so that the light emitted by the emitting portion 522 is concentrated into a parallel beam of light to be emitted. Specifically, in the illustrated embodiment, a first light guide hole 5652 is opened at the focal position of the first parabolic surface 5672, and the first light guide hole 5652 is penetrated through the emitting part. It can be understood that, in other embodiments, the emitting portion 522 may also be directly placed at the focal position of the first parabolic surface 5672. The embodiment in which the first inner cavity 5622 is provided with the first paraboloid 5672 can be applied to the embodiment in which the first lens 57 is provided in the first inner cavity 5622 and the first lens 57 is not provided.

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

In the example of FIG. 13, the first sealing plug 562 further includes a positioning pin 561. Through the positioning effect of the positioning pin 561, the sealing plug 56 can be accurately installed on the first fixing portion 521. The planar shape of the positioning pin 561 is rectangular, circular, triangular, etc., and is not limited here. In the example of FIG. 13, the planar shape of the positioning pin 561 is rectangular. The second sealing plug 564 and the first sealing plug 562 have a similar structure.

In summary, the kitchen device 100 according to the embodiment of the present application includes a fan assembly 30 and a fume detection assembly 50. The fan assembly 30 includes a volute 32 and a fan 34 arranged in the volute 32. The kitchen device 100 includes a fume air downstream of the fan 34. The oil fume detection assembly 50 is arranged in the oil fume air duct downstream of the fan 34. The oil fume detection assembly 50 includes a light emitting device 52 and a light receiving device 54. The light emitting device 52 is used to emit light to the oil fume duct. The light receiving device 54 is used to receive the light emitted by the light emitting device 52 and output electrical signals according to the received light. The central axis E of the air outlet 321 of the volute 32 is located between the light receiving device 54 and the rotation axis F of the impeller of the fan 34, or the central axis E of the air outlet 321 of the volute 32 is located between the light emitting device 52 and the fan 34 Between the axis of rotation F of the impeller.

In the kitchen device 100 of the above embodiment, the central axis E of the air outlet 321 of the volute 32 is located between the light receiving device 54 and the central axis F of the impeller of the fan 34, or the central axis E of the air outlet 321 of the volute 32 is located in the light Between the transmitting device 52 and the rotation axis F of the impeller of the fan 34, when the concentration of the soot particles 110 in the soot air duct is slightly changed, the light intensity received by the light receiving device 54 can be changed significantly, that is, the oil smoke detection is improved. Sensitivity of component 50.

It should be noted that in the drawings of the present application, the straight line with arrows represents the light and its propagation direction, which is a schematic representation, and should not be construed as a limitation of the present application.

In the description of this specification, reference is made to the terms “certain embodiments”, “one embodiment”, “some embodiments”, “exemplary embodiments”, “examples”, “specific examples”, or “some examples”. The description means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above-mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality of" means at least two, for example two, three, unless otherwise specifically defined.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present application. A person of ordinary skill in the art can comment on the foregoing within the scope of the present application. The embodiments are subject to changes, modifications, substitutions and modifications, and the scope of this application is defined by the claims and their equivalents.

Claims

A kitchen device, characterized in that the kitchen device includes a fan assembly and an oily smoke detection assembly, the fan assembly includes a volute and a fan arranged in the volute, and the kitchen device includes a fan located downstream of the fan. The oil fume air duct, the oil fume detection assembly is arranged in the oil fume air duct downstream of the fan, the oil fume detection assembly includes a light emitting device and a light receiving device, the light emitting device is used to emit light to the oil fume air duct, so The light receiving device is used to receive the light emitted by the light emitting device and output an electrical signal according to the received light. The center axis of the air outlet of the volute is located at the rotation axis of the light receiving device and the impeller of the fan Or the central axis of the air outlet of the volute is located between the light emitting device and the rotation axis of the impeller of the fan.
The kitchen device according to claim 1, wherein the central axis of the light emitting device and the central axis of the light receiving device intersect the central axis of the oil fume duct, and the central axis of the light emitting device It is located on the same straight line or different straight lines with the central axis of the light receiving device.
The kitchen appliance according to claim 2, wherein the plane formed by the central axis of the light emitting device and the central axis of the light receiving device is parallel or parallel to a plane perpendicular to the central axis of the fume duct tilt.
The kitchen device according to claim 1, wherein the light emitting device comprises a first sealing plug, a transmitting part and a first circuit board, and the first sealing plug is mounted on the first circuit board, so The first sealing plug is formed with a first inner cavity, and the emitting part is located in the first inner cavity and arranged on the first circuit board; and/or

The light receiving device includes a second sealing plug, a receiving part and a second circuit board, the second sealing plug is mounted on the second circuit board, the second sealing plug is formed with a second inner cavity, the The receiving part is located in the second inner cavity and arranged on the second circuit board.
The kitchen appliance according to claim 4, wherein a first paraboloid is formed at one end of the first inner cavity, and the emitting part is located at a focal position of the first paraboloid.
The kitchen appliance according to claim 4, wherein a second paraboloid is formed at one end of the second inner cavity, and the receiving part is located at a focal position of the second paraboloid.
The kitchen device according to claim 4, wherein the light emitting device comprises a first lens, and the first lens is disposed in the first inner cavity and located on the light emitting path of the emitting part, so The first lens is used to emit the light rays emitted by the emitting part in parallel.
The kitchen appliance according to claim 4, wherein the light receiving device comprises a second lens, and the second lens is arranged in the second inner cavity and located on the receiving light path of the receiving part, so The second lens is used for converging the light entering from the second inner cavity to the receiving part.
The kitchen appliance according to claim 4, wherein the inner wall of the first inner cavity is provided with a first shielding portion at the front end of the emitting portion.
The kitchen appliance according to claim 4, wherein the inner wall of the second inner cavity is provided with a second shielding portion at the front end of the receiving portion.
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 to the first shielding portion.
The kitchen appliance according to claim 10, wherein the inner wall of the second inner cavity is provided with a second oil guide groove connected to the second shielding portion.
The kitchen appliance according to claim 1, wherein the light emitting device comprises a first sealing plug, one end of the first sealing plug is provided with a transmission opening, and the light receiving device comprises a second sealing plug, so One end of the second sealing plug is provided with a receiving opening, and the diameter of the receiving opening is larger than the diameter of the emitting opening.
The kitchen device according to claim 1, wherein the kitchen device includes a first fixing portion and a second fixing portion, the first fixing portion fixes the light emitting device, and the second fixing portion fixes the light emitting device.说光收装置。 The light receiving device.
The kitchen device according to claim 14, wherein the kitchen device comprises a check valve, and the first fixing part, the second fixing part and the check valve are an integral structure or a separate structure.
The kitchen appliance according to claim 1, wherein the kitchen appliance comprises a check valve, a first sealing plug and a second sealing plug, and the check valve is provided with a first through hole and a second through hole, The first sealing plug is partially arranged in the first through hole, and the second sealing plug is partially arranged in the second through hole.
The kitchen appliance according to claim 16, wherein the check valve comprises a first convex ring protruding from the inner wall of the first through hole.
The kitchen appliance according to claim 16, wherein the check valve comprises a second convex ring protruding from the inner wall of the second through hole.
The kitchen device according to claim 1, wherein the kitchen device includes a check valve and a wire protection structure provided on the outer wall of the check valve, and the oily smoke detection assembly includes a connection with the light emitting device and The wire of the light receiving device, part of the wire is contained in the wire protection structure.
The kitchen device according to claim 19, wherein the kitchen device comprises a protective member and a wiring member, the protective member and the wiring member are installed in the box, and the protective member is connected to the protective wire structure and In the wiring member, the protective member contains a wire between the wire guard structure and the wiring member, and the wire extends into the wiring member.