Oil fume sensor and kitchen appliance

Abstract

The application discloses an oil fume sensor and a kitchen appliance. The oil fume sensor comprises a shell, the shell is provided with a containing cavity, the shell comprises a first side wall and a second side wall, the second side wall is tightly matched outside the first side wall to form a closed space for the containing cavity, and a sensor assembly is located in the containing cavity. The oil fume sensor of the embodiment of the application is tightly matched outside the first side wall through the second side wall to form a closed space, so that external oil fume is not easy to enter the containing cavity, and then pollution of the sensor assembly is avoided or reduced, and the performance and service life of the oil fume sensor are ensured.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to an oil fume sensor and a kitchen appliance. Background Technology

[0002] A smart range hood is a range hood with certain intelligent adjustment functions. In order to ensure that a smart range hood can respond to oil fumes in a timely manner, various types of oil fume sensors are essential.

[0003] Oil fume sensors typically detect oil fumes by detecting the concentration of oil fume dust particles through light scattering. However, this method requires the oil fume sensor to be located where the oil fume passes through, making the sensor susceptible to oil fume contamination and affecting its performance and lifespan. Summary of the Invention

[0004] The present invention provides an oil fume sensor and a kitchen appliance.

[0005] The fume sensor of this invention includes: a housing, the housing having an accommodating cavity, the housing including a first sidewall and a second sidewall, the second sidewall being tightly fitted to the outside of the first sidewall to form a sealed space for the accommodating cavity;

[0006] The sensor assembly is located within the accommodating cavity.

[0007] In some embodiments, the second sidewall is interference-fitted with the outer side of the first sidewall to achieve a tight fit between the second sidewall and the outer side of the first sidewall.

[0008] In some embodiments, the sensor assembly includes a main control board, the accommodating cavity includes a first receiving cavity, the main control board is housed in the first receiving cavity, the housing includes an exhaust cover and a top cover, the exhaust cover includes a first cover body and a first exhaust pipe passing through the first cover body, one end of the first exhaust pipe is provided with a sealing groove, the top cover includes a second cover body and a second exhaust pipe passing through the second cover body, the second exhaust pipe is provided with a sealing protrusion that cooperates with the sealing groove, the interior of the first exhaust pipe and the interior of the second exhaust pipe are connected to form an exhaust chamber, and the first cover body, the second cover body, the first exhaust pipe and the second exhaust pipe surround to form the first receiving cavity.

[0009] In some embodiments, the outer sidewall of the sealing protrusion is formed with the first sidewall, and the inner sidewall of the sealing groove is formed with the second sidewall.

[0010] In some embodiments, the inner sidewall of the sealing protrusion is formed with a second sidewall, and the outer sidewall of the sealing groove is formed with a first sidewall.

[0011] In some embodiments, the top cover has a hollow protective member protruding from it, the inner edge of which forms a second sidewall, and the main control board has a socket protruding from it, the periphery of which forms a first sidewall.

[0012] In some embodiments, the sensor assembly includes a transmitter, a receiver, and a lens; the accommodating cavity includes a second accommodating cavity in which the transmitter and the receiver are housed; the housing includes a top cover and a bottom cover; the bottom cover includes a first shell and a first air inlet duct passing through the first shell; the top cover, the first shell, and the lens surround to form the second accommodating cavity.

[0013] In some embodiments, the upper cover peripheral wall is formed with the first sidewall, the first shell is provided with a protruding ring, and the inner sidewall of the protruding ring is formed with the second sidewall.

[0014] In some embodiments, the housing further includes an exhaust cover with a receiving groove, the inner sidewall of which forms a second sidewall, and the first housing has a protruding ring with the outer sidewall of which forms the first sidewall.

[0015] In some embodiments, the housing further includes a fixing portion to limit the lens, wherein the outer sidewall of the lens is formed with the first sidewall, and the inner sidewall of the fixing portion is formed with the second sidewall.

[0016] and / or

[0017] The inner wall of the lens has a second sidewall, and the outer wall of the fixing part has a first sidewall.

[0018] The present invention also provides a kitchen appliance, the kitchen appliance comprising: a housing;

[0019] The fan assembly is installed inside the housing;

[0020] The fume sensor as described in the above embodiment is installed in the housing.

[0021] The fume sensor and kitchen appliance of the present invention form a sealed space by tightly fitting the second sidewall to the outside of the first sidewall, making it difficult for external fumes to enter the accommodating cavity, thereby avoiding or reducing the contamination of the sensor components and ensuring the performance and service life of the fume sensor.

[0022] Additional aspects and advantages 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 the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a cross-sectional schematic diagram of the oil fume sensor according to an embodiment of the present invention;

[0025] Figure 2 This is a three-dimensional schematic diagram of the oil fume sensor according to an embodiment of the present invention;

[0026] Figure 3 This is an exploded schematic diagram of the oil fume sensor according to an embodiment of the present invention;

[0027] Figure 4 This is another cross-sectional schematic diagram of the oil fume sensor according to an embodiment of the present invention;

[0028] Figure 5 This is a partial cross-sectional schematic diagram of the oil fume sensor according to an embodiment of the present invention;

[0029] Figure 6 This is another cross-sectional schematic diagram of the fume sensor according to an embodiment of the present invention;

[0030] Figure 7 for Figure 4 Enlarged view of point A in the middle;

[0031] Figure 8 for Figure 4 Enlarged view of point B in the middle;

[0032] Figure 9 for Figure 4 Enlarged view of point C in the middle;

[0033] Figure 10 for Figure 4 Enlarged view of point D in the middle;

[0034] Figure 11 This is a schematic diagram of the structure of a kitchen appliance according to an embodiment of the present invention.

[0035] Key features (reference numerals):

[0036] Oil fume sensor 100, housing 10, accommodating cavity 11, first accommodating cavity 111, second accommodating cavity 112, first side wall 12, second side wall 13, exhaust cover 14, first cover 141, accommodating groove 1411, first exhaust pipe 142, sealing groove 1424, top cover 15, second cover 151, second exhaust pipe 152, sealing protrusion 1521, protective component 153, exhaust cavity 16, bottom shell 17, first shell 171, protruding ring 1711, first air inlet pipe 172, fixing part 18, air inlet shell 19, second shell 191, second air inlet pipe 192, air inlet cavity 101, sensor assembly 20, main control board 21, socket 211, transmitter 22, receiver 23, lens 24, kitchen appliance 1000, housing 200, fan assembly 300. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of this invention, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0042] Please see Figure 1 and Figure 2 This invention provides an oil fume sensor 100, which includes a housing 10 and a sensor assembly 20. The housing 10 has a receiving cavity 11, which includes a first sidewall 12 and a second sidewall 13. The second sidewall 13 is tightly fitted to the outside of the first sidewall 12 to form a sealed space within the receiving cavity 11. The sensor assembly 20 is located within the receiving cavity 11.

[0043] The fume sensor 100 of this invention forms a sealed space by having the second sidewall 13 tightly attached to the outside of the first sidewall 12, making it difficult for external fumes to enter the accommodating cavity 11, thereby avoiding or reducing the contamination of the sensor assembly 20 and ensuring the performance and service life of the fume sensor 100.

[0044] Specifically, the outer side mentioned in this embodiment of the invention can be a position relatively close to the gas containing oil fumes, that is, a position relatively far from the receiving cavity 11. Conversely, the inner side mentioned in this embodiment of the invention can be a position relatively far from the gas containing oil fumes, that is, a position relatively close to the receiving cavity 11. When it is difficult to determine where is relatively close to the gas containing oil fumes, it can be assumed that the portion of the housing 10 with the second sidewall 13 should be fitted over the portion of the housing 10 with the first sidewall 12. That is, the inner diameter of the portion of the housing 10 with the second sidewall 13 should be approximately equal to the outer diameter of the portion of the housing 10 with the first sidewall 12, thereby determining where the second sidewall 13 and the first sidewall 12 are located.

[0045] External oil-fume-laden gas has difficulty entering the accommodating cavity 11 through the gap between the second sidewall 13 and the first sidewall 12. Even if gaps are formed on the outer sides of the second sidewall 13 and the first sidewall 12 due to production, use wear, or other reasons, the external oil-fume-laden gas still needs to pass through the relatively long gap formed on the outer sides of the second sidewall 13 and the first sidewall 12 to enter the accommodating cavity 11. This increases the probability that oil fume particles in the oil-fume-laden gas will be adsorbed on the outer side of the second sidewall 13 or the first sidewall 12, and reduces the probability that oil fume particles will enter the accommodating cavity 11 and contaminate the sensor assembly 20.

[0046] It is worth noting that the housing 10 may include multiple sub-housings. Each of the multiple sub-housings may be provided with a first sidewall 12 and a second sidewall 13 that cooperate with each other to achieve a tight fit. Alternatively, any two adjacent sub-housings may be provided with a first sidewall 12 and a second sidewall 13 that cooperate with each other. No specific restrictions are imposed here.

[0047] A tight fit between the first sidewall 12 and the second sidewall 13 can be achieved by injecting adhesive between the second sidewall 13 and the first sidewall 12, or by an interference fit between the second sidewall 13 and the first sidewall 12. These methods will not be listed here.

[0048] The fume sensor 100 can be a gas composition detection device. Taking the application of the fume sensor 100 in a kitchen appliance 1000 as an example, when a user uses the kitchen appliance 1000 and generates fumes, a certain amount of organic molecules are produced. Generally, the concentration of organic molecules is directly proportional to the concentration of fumes. Therefore, by detecting the current concentration of organic molecules, it can be determined whether the user is cooking and the concentration of fumes. Specifically, the gas composition detection device can use a VOC (volatile organic compounds) sensor.

[0049] The fume sensor 100 can be a gas particle concentration detection device. Oil fume particles generated by the user's use of kitchen appliances 1000 will mix with the gas and enter the fume sensor 100. Therefore, by detecting the gas particle concentration, it can be determined whether the user is cooking. There are many types of gas particle concentration detection devices, such as infrared detection devices and laser detection devices, etc., and no specific limitation is made here.

[0050] Taking the oil fume sensor 100 as an infrared detection device as an example, the sensor assembly 20 includes, but is not limited to, a transmitter 22, a receiver 23, and a main control board 21. The transmitter 22 can be used to emit light into the gas that may be contaminated with oil fumes, and the receiver 23 can be used to receive the light emitted by the transmitter 22. The main control board 21 is electrically connected to the transmitter 22 and the receiver 23, thereby controlling the transmitter 22 to emit light and determining the current oil fume situation of the gas based on the light information received by the receiver 23. It can be understood that the particle size of oil fume particles ranges from 100nm to 10um. When oil fume particles pass through the light path of the transmitter 22, they can cause the infrared light to be blocked, scattered, and diffracted. That is to say, oil fume particles will affect the intensity of the light received by the receiver 23, thus causing changes in the light information obtained by the main control board 21.

[0051] The main control board 21 can also be equipped with a communication module, which can be connected to mobile terminals such as mobile phones, tablets, and computers to facilitate user control of the fume sensor 100. The communication module can also be electrically or communicatively connected to other components of the kitchen appliance 1000 to enable the fume sensor 100 to be turned on or off according to the status of the switching components of the kitchen appliance 1000, and to the motor components to be turned on or off or to increase or decrease the power of the motor components according to the detection results of the fume sensor 100.

[0052] Please see Figure 1 In some embodiments, the second sidewall 13 is interference-fitted with the outer side of the first sidewall 12 to achieve a tight fit between the second sidewall 13 and the first sidewall 12.

[0053] With this configuration, the second sidewall 13 can be installed on the outer side of the first sidewall 12 to achieve a tight fit without any other steps, which simplifies the operation and saves production costs.

[0054] Specifically, in order to facilitate the installation of the second sidewall 13 and the first sidewall 12, a guide slope can be provided on the outside of the first sidewall 12, or a guide slope can be provided on the second sidewall 13. Alternatively, mutually cooperating guide slopes can be provided on the first sidewall 12 and the second sidewall 13 respectively to guide the installation of the second sidewall 13 and the first sidewall 12, forming an interference fit after installation.

[0055] In some implementations, please refer to Figure 1 and Figure 3 The sensor assembly 20 includes a main control board 21, the accommodating cavity 11 includes a first accommodating cavity 111, the main control board 21 is housed in the first accommodating cavity 111, the housing 10 includes an exhaust cover 14 and a top cover 15, the exhaust cover 14 includes a first cover body 141 and a first exhaust pipe 142 passing through the first cover body 141, one end of the first exhaust pipe 142 is provided with a sealing groove 1424, the top cover 15 includes a second cover body 151 and a second exhaust pipe 152 passing through the second cover body 151, the second exhaust pipe 152 is provided with a sealing protrusion 1521 that cooperates with the sealing groove 1424, the interior of the first exhaust pipe 142 and the interior of the second exhaust pipe 152 are connected to form an exhaust cavity 16, the first cover body 141, the second cover body 151, the first exhaust pipe 142 and the second exhaust pipe 152 surround to form the first accommodating cavity 111.

[0056] With this configuration, the exhaust cover 14 and the top cover 15 together form the first receiving cavity 111 for accommodating the main control board 21, protecting the main control board 21 from contact with the gas containing oil fumes, reducing the probability of main control board 21 failure, and increasing the working life of the main control board 21.

[0057] Specifically, the first cover 141 and the first exhaust pipe 142 can be an integral structure. For example, the first cover 141 and the first exhaust pipe 142 can be integrally injection molded, or the first cover 141 and the first exhaust pipe 142 can be cut together. This arrangement simplifies the production of the first cover 141 and the first exhaust pipe 142 and eliminates any connecting gaps between them, thus increasing the sealing performance of the first receiving cavity 111.

[0058] The first cover 141 can have many shapes, such as a cuboid or a hemisphere, and no specific restrictions are imposed here.

[0059] The first exhaust duct 142 can extend vertically, horizontally, or at any angle to the vertical. In one embodiment, the first exhaust duct 142 extends vertically. This arrangement allows condensed oil droplets within the duct to drip off under gravity, reducing the rate at which the duct becomes contaminated with oil and increasing its service life. The first exhaust duct 142 can have various shapes, including squares and circles, and is not specifically limited here.

[0060] The second cover 151 and the second exhaust pipe 152 can be an integral structure. For example, the second cover 151 and the second exhaust pipe 152 can be integrally injection molded, or the second cover 151 and the second exhaust pipe 152 can be cut together. This arrangement simplifies the production of the second cover 151 and the second exhaust pipe 152 and eliminates the connection gap between the second cover 151 and the second exhaust pipe 152, thereby increasing the sealing performance of the first receiving cavity 111.

[0061] The extension direction of the second exhaust duct 152 can be the same as that of the first exhaust duct 142. This allows the gas containing oil fumes to move in the same direction within the exhaust cavity 16 formed by the second exhaust duct 152 and the first exhaust duct 142, reducing the probability of oil fume particles remaining on the first exhaust duct 142 and the second exhaust duct 152, and slowing down the rate at which the oil fume sensor 100 is contaminated by oil fumes.

[0062] There are many ways in which the first sidewall 12 and the second sidewall 13 are arranged on the sealing groove 1424 and the sealing protrusion 1521. The following embodiments will describe the arrangement in detail.

[0063] In some implementations, please refer to Figure 4 and Figure 5 The outer sidewall of the sealing protrusion 1521 is formed with a first sidewall 12a, and the inner sidewall of the sealing groove 1424 is formed with a second sidewall 13a.

[0064] With this configuration, the first sidewall 12a of the sealing protrusion 1521 and the second sidewall 13a of the sealing groove 1424 fit together tightly, effectively increasing the airtightness of the first receiving cavity 111 and reducing the probability of oil fumes entering the first receiving cavity 111 from the connection between the first exhaust pipe 142 and the second exhaust pipe 152.

[0065] Specifically, the second sidewall 13a of the sealing groove 1424 and the outer sidewall of the sealing protrusion 1521 can be tightly fitted by an interference fit.

[0066] It is worth noting that the outer wall of the sealing protrusion 1521 refers to the groove wall of the sealing protrusion 1521 that is farther away from the receiving cavity 11, and the inner wall of the sealing groove 1424 refers to the groove wall of the sealing groove 1424 that is closer to the receiving cavity 11.

[0067] In some implementations, please refer to Figure 6 The inner wall of the sealing protrusion 1521 is formed with a second sidewall 13b, and the outer wall of the sealing groove 1424 is formed with a first sidewall 12b.

[0068] With this configuration, the second sidewall 13b of the sealing protrusion 1521 fits tightly with the first sidewall 12b of the sealing groove 1424, effectively increasing the airtightness of the first receiving cavity 111 and reducing the probability of oil fumes entering the first receiving cavity 111 from the connection between the first exhaust pipe 142 and the second exhaust pipe 152.

[0069] In some implementations, please refer to Figure 7 The outer and inner walls of the sealing protrusion 1521 are respectively formed with a first sidewall 12a and a second sidewall 13b, and the inner and outer groove walls of the sealing groove 1424 are respectively formed with a second sidewall 13a and a first sidewall 12b.

[0070] This design ensures the airtightness of the first receiving cavity 111. Furthermore, even if the tight fit between the first sidewall 12 and the second sidewall 13 fails due to production or wear, the fumes must first pass through the gap formed by the second sidewall 13a of the sealing groove 1424 and the first sidewall 12a of the sealing protrusion 1521, and then through the gap formed by the first sidewall 12b of the sealing groove 1424 and the second sidewall 13b of the sealing protrusion 1521 before entering the first receiving cavity 111, thereby effectively isolating the first receiving cavity 111 from the fumes.

[0071] In summary, the sealing protrusion 1521 may have a first sidewall 12a, and the sealing groove 1424 may have a corresponding second sidewall 13a; the sealing protrusion 1521 may also have a second sidewall 13b, and the sealing groove 1424 may have a corresponding first sidewall 12b; the sealing protrusion 1521 may also have a first sidewall 12a and a second sidewall 13b, and the sealing groove 1424 may have a corresponding second sidewall 13a and a first sidewall 12b.

[0072] In some implementations, please refer to Figure 4 and Figure 8 The upper cover 15 has a hollow protective element 153 protruding from it, and a second side wall 13c is formed on the inner edge of the protective element 153. The main control board 21 has a socket 211 protruding from it, and a first side wall 12c is formed around the socket 211.

[0073] With this configuration, the second sidewall 13c of the protective member 153 cooperates with the first sidewall 12c of the socket 211, effectively preventing oil fumes from entering the first receiving cavity 111 from the gap between the socket 211 and the protective member 153.

[0074] Specifically, the sensor assembly 20 may include a transmitter 22 and a receiver 23. The transmitter 22 and receiver 23 may be connected to the main control board 21 by means of plug-in and socket 211 respectively, so as to receive control from the main control board 21 and transmit information to the main control board 21. However, when the transmitter 22 and receiver 23 are not located in the first receiving cavity 111, the plug-in and socket 211 may affect the sealing of the first receiving cavity 111. Therefore, the upper cover 15 is provided with a protective member 153, which fits tightly with the socket 211 and the plug is inserted into the socket 211, thus ensuring the sealing of the first receiving cavity 111.

[0075] In some implementations, please refer to Figure 1 and Figure 3 The sensor assembly 20 includes a transmitter 22, a receiver 23, and a lens 24. The accommodating cavity 11 includes a second accommodating cavity 112, in which the transmitter 22 and the receiver 23 are housed. The housing 10 includes an upper cover 15 and a bottom shell 17. The bottom shell 17 includes a first shell 171 and a first air inlet pipe 172 passing through the first shell 171. The upper cover 15, the first shell 171, and the lens 24 surround and form the second accommodating cavity 112.

[0076] With this configuration, the top cover 15 and the bottom shell 17 together form a second receiving cavity 112 for accommodating the transmitter 22 and the receiver 23, protecting the transmitter 22 and the receiver 23 from contact with the gas containing oil fumes, reducing the probability of transmitter 22 and receiver 23 malfunctioning, and increasing the service life of transmitter 22 and receiver 23.

[0077] Specifically, the first housing 171 and the first air inlet pipe 172 can be an integral structure. For example, the first housing 171 and the first air inlet pipe 172 can be integrally injection molded, or the first housing 171 and the first air inlet pipe 172 can be machined together. This arrangement simplifies the production of the first housing 171 and the first air inlet pipe 172 and eliminates any connecting gaps between them, thus increasing the sealing performance of the second receiving cavity 112.

[0078] The first air inlet duct 172 can extend vertically, horizontally, or at any angle to the vertical. In one embodiment, the first air inlet duct 172 extends vertically. This arrangement allows oil droplets condensing inside the first air inlet duct 172 to drip off under gravity, reducing the rate at which the first air inlet duct 172 becomes contaminated with oil and increasing its service life. The first air inlet duct 172 can have various shapes, including squares and circles, and no specific limitations are imposed here.

[0079] For further details, please refer to Figure 4 and Figure 9 The upper cover 15 has a first sidewall formed around its perimeter, and the first shell 10 has a protruding ring 1711, the inner sidewall of which has a second sidewall 13d.

[0080] With this configuration, the first sidewall of the top cover 15 and the second sidewall 13d of the convex ring 1711 fit together tightly, effectively increasing the airtightness of the second receiving cavity 112 and reducing the probability of oil fumes entering the second receiving cavity 112 from the connection between the top cover 15 and the first shell 171.

[0081] Specifically, the first sidewall of the upper cover 15 and the second sidewall 13d of the protruding ring 1711 can be tightly fitted by an interference fit. The first sidewall of the upper cover 15 and the second sidewall 13d of the protruding ring 1711 can each be provided with mutually cooperating guide slopes, so that the first sidewall of the upper cover 15 and the second sidewall 13d of the protruding ring 1711 are in clearance fit or transition fit during assembly, and form an interference fit after assembly, so as to facilitate the assembly of the upper cover 15 and the first shell 171.

[0082] In some embodiments, the housing 10 further includes an exhaust cover 14, which has a receiving groove 1411. The inner sidewall of the receiving groove 1411 is formed with a second sidewall 13e. The first housing 171 has a protruding ring 1711, and the outer sidewall of the protruding ring 1711 is formed with a first sidewall 12e.

[0083] With this configuration, the first sidewall 12e of the convex ring 1711 fits tightly with the second sidewall 13e of the receiving groove 1411, reducing the probability that oil fumes will enter the second receiving cavity 112 from the connection between the first shell 171 and the exhaust cover 14.

[0084] Specifically, the direction in which the first sidewall 12e of the protruding ring 1711 is assembled with the second sidewall 13e of the receiving groove 1411 is set as the assembly direction. The first shell 171 may be provided with a buckle protruding in a direction perpendicular to the assembly direction, and the exhaust cover 14 may be provided with a through hole that engages with the buckle. In this way, after the first sidewall 12e of the protruding ring 1711 and the second sidewall 13e of the receiving groove 1411 are assembled, the buckle and the through hole engage and limit the bottom shell 17 and the exhaust cover 14, ensuring that the relative positional relationship between the bottom shell 17 and the exhaust cover 14 remains unchanged.

[0085] Furthermore, the two sides of the convex ring 1711 can be respectively provided with a first sidewall 12e and a second sidewall 13d. The second sidewall 13d on the inner side of the convex ring 1711 cooperates with the first sidewall of the upper cover 15, and the first sidewall 12e on the outer side of the convex ring 1711 cooperates with the receiving groove 1411 of the exhaust cover 14. The upper cover 15 can be provided with a limiting protrusion, which is located in the receiving groove 1411 and abuts against the convex ring 1711, so that the groove wall of the receiving groove 1411 and the convex ring 1711 together clamp the limiting protrusion, thereby limiting the upper cover 15. With this configuration, after the buckle of the first shell 171 cooperates with the through hole of the exhaust cover 14, the relative positional relationship between the upper cover 15, the first shell 171, and the exhaust cover 14 can still be maintained.

[0086] In some embodiments, the housing 10 further includes a fixing portion 18 to limit the lens 24, wherein the outer sidewall of the lens 24 is formed with a first sidewall 12f, and the inner sidewall of the fixing portion 18 is formed with a second sidewall 13f.

[0087] and / or

[0088] The inner wall of the lens 24 is provided with a second sidewall 13g, and the outer wall of the fixing part 18 is formed with a first sidewall 12g.

[0089] With this configuration, the fixing part 18 and the lens 24 fit together tightly, reducing the probability that oil fumes will enter the second receiving cavity 112 from the connection between the fixing part 18 and the lens 24.

[0090] Specifically, the fixing part 18 may include fins. In one embodiment, the fins are located outside the lens 24, the fins are formed with a second sidewall 13f, and the lens 24 is formed with a first sidewall 12f.

[0091] In one embodiment, the fin is located inside the lens 24, the fin has a first sidewall 12g, and the lens 24 has a second sidewall 13g.

[0092] In one embodiment, the fixing part 18 includes at least two fins, and the lens 24 is located in the gap between two adjacent fins. The inner sidewall of the outer fin between two adjacent fins is formed with a second sidewall 13f, the outer sidewall of the lens 24 is formed with a first sidewall 12f, the outer sidewall of the inner fin between two adjacent fins is formed with a first sidewall 12g, and the inner sidewall of the lens 24 is formed with a second sidewall 13g.

[0093] It is worth noting that the position closer to the gas containing oil fumes is called the outer side, and the position farther away from the gas containing oil fumes is called the inner side.

[0094] In some embodiments, a semi-circular through hole is provided at one end of the fin near the lens 24. The fixing part 18 includes multiple fins, which are respectively installed on the first shell 171 and the second cover 151. While the first shell 171 and the second cover 151 are assembled to form the second receiving cavity 112, the upper and lower fins are also assembled to form a circular through hole. In this way, the light from the lens 24 and the emitter 22 or receiver 23 can be shaped. In addition, when the fins are in use, two fins 18 are assembled to form a circular light hole, while during production, fins with semi-circular through holes are produced separately to achieve the effect of easy demolding.

[0095] For details, please refer to Figures 1 to 4 In one embodiment, the housing 10 includes an exhaust cap 14, a top cover 15, a bottom shell 17, and an air inlet shell 19. The air inlet 19 includes a second shell 191 and a second air inlet pipe 192 passing through the second shell 191. The bottom shell 17 has a first air inlet pipe 172, and the first air inlet pipe 172 and the second air inlet pipe 192 are internally connected to form an air inlet chamber 101. The exhaust cap 14 has a first exhaust pipe 142, and the top cover 15 has a second exhaust pipe 152, and the first exhaust pipe 142 and the second exhaust pipe 152 are internally connected to form an exhaust chamber 16. The housing 10 also includes a detection chamber located between the air inlet chamber 101 and the exhaust chamber 16, for the sensor assembly 20 to detect the gas within the detection chamber. The sensor assembly 20 includes a main control board 21, a transmitter 22, a receiver 23, and a lens 24. The transmitter 22 and the receiver 23 are each provided with a lens 24. Gas containing oil fumes enters the detection chamber from the air inlet 101. The transmitter 22 emits light, which enters the detection chamber through the lens 24 of the transmitter 22. The gas in the detection chamber affects the light emitted by the transmitter 22. The receiver 23 receives the light affected by the gas in the detection chamber through the lens 24 of the receiver 23 and transmits the received information to the main control board 21. The main control board 21 analyzes the concentration of oil fume particles in the gas based on the influence.

[0096] Please see Figure 11 This invention provides a kitchen appliance 1000, including a housing 200, a fan assembly 300, and a fume sensor 100. The fan assembly 300 is installed inside the housing 200.

[0097] The kitchen appliance 1000 of this invention forms a sealed space by having the second sidewall 13 tightly attached to the outside of the first sidewall 12, making it difficult for external oil fumes to enter the accommodating cavity 11, thereby avoiding or reducing the contamination of the sensor assembly 20 and ensuring the performance and service life of the oil fume sensor 100.

[0098] Specifically, the kitchen appliance 1000 of this application includes, but is not limited to, a baffle assembly and a check valve. A housing 200 is mounted on the baffle assembly. The baffle assembly has a smoke collection chamber and multiple function buttons. The smoke collection chamber contains an oil filter and a top plate. The multiple function buttons allow users to input operating commands. A fan assembly 300 is housed inside the housing 200. The fan assembly 300 includes a volute, a fan, an air inlet, and an air outlet. The fan is housed within the volute, which forms a volute air duct. The air inlet allows oil fumes to enter the fan assembly 300, and the air outlet connects to the volute air duct to exhaust the oil fumes from the fan assembly 300. A check valve is connected to the top of the housing 200, and a check valve air duct is formed within the check valve. It is understood that a check valve is a valve whose opening and closing element is a circular valve disc that relies on its own weight and the pressure of the medium to prevent backflow of the medium. The check valve can be a lift check valve or a swing check valve.

[0099] The fume sensor 100 should be installed in a location in the kitchen appliance 1000 where the gas containing oil fumes will pass through, such as the center of the deflector plate or the air inlet of the fan assembly 200, so that the gas containing oil fumes can enter the fume sensor 100 for detection.

[0100] Specifically, after cooking fumes are generated around the kitchen appliance 1000, the fumes move under the influence of the appliance and enter the air inlet chamber 101 of the fume sensor 100 located in the housing 200. The housing 10 also includes a detection chamber located between the air inlet chamber 101 and the exhaust chamber 16, for the sensor assembly 20 to detect the gas inside the detection chamber. The sensor assembly 20 includes a main control board 21, a transmitter 22, a receiver 23, and a lens 24. The transmitter 22 and the receiver 23 are each equipped with a lens 24. Gas carrying cooking fumes enters the detection chamber from the air inlet chamber 101. The transmitter 22 emits light, which passes through the lens 24 of the transmitter 22 and enters the detection chamber. The gas inside the detection chamber affects the light emitted by the transmitter 22. The receiver 23 receives the light affected by the gas inside the detection chamber through its lens 24 and transmits the received information to the main control board 21. The main control board 21 analyzes the concentration of cooking fume particles in the gas based on the influence. The detected gas is discharged from the oil fume sensor 100 through the exhaust chamber 16.

[0101] In some embodiments, the exhaust chamber 16 of the fume sensor 100 faces the air inlet of the fan assembly 300, and the air inlet chamber 101 of the fume sensor 100 is spaced apart from the air inlet of the fan assembly 300.

[0102] Thus, after the fan assembly 300 operates, the exhaust chamber 16 and the intake chamber 101 of the oil fume sensor 100 generate a pressure difference, and the airflow carrying oil fumes enters the intake chamber under the action of the pressure difference.

[0103] Specifically, the air inlet chamber 101 of the fume sensor 100 is spaced from the air inlet of the fan assembly 300, but under the action of the fan assembly 300, it can have a certain negative pressure relative to atmospheric pressure, for example, -5Pa. Under the action of the fan assembly 300, the exhaust chamber 16 of the fume sensor 100 can have a negative pressure of approximately -30Pa relative to atmospheric pressure, thereby creating a pressure difference of approximately 25Pa between the air inlet chamber 101 and the exhaust chamber 16, thus driving the movement of the gas containing oil fumes.

[0104] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific 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, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0105] 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. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An oil fume sensor, characterized in that, include: The housing has an accommodating cavity. The housing includes a first sidewall and a second sidewall. The second sidewall is tightly fitted to the outside of the first sidewall to form a sealed space for the accommodating cavity. The sensor assembly is located within the accommodating cavity; The sensor assembly includes a main control board, the accommodating cavity includes a first accommodating cavity, the main control board is housed in the first accommodating cavity, the housing includes an exhaust cover and a top cover, the exhaust cover includes a first cover body and a first exhaust pipe passing through the first cover body, one end of the first exhaust pipe is provided with a sealing groove, the top cover includes a second cover body and a second exhaust pipe passing through the second cover body, the second exhaust pipe is provided with a sealing protrusion that cooperates with the sealing groove, the interior of the first exhaust pipe and the interior of the second exhaust pipe are connected to form an exhaust chamber, the first cover body, the second cover body, the first exhaust pipe and the second exhaust pipe surround to form the first accommodating cavity.

2. The oil fume sensor according to claim 1, characterized in that, The second sidewall is interference-fitted with the outer side of the first sidewall to achieve a tight fit between the second sidewall and the outer side of the first sidewall.

3. The oil fume sensor according to claim 1, characterized in that, The outer sidewall of the sealing protrusion is formed with the first sidewall, and the inner sidewall of the sealing groove is formed with the second sidewall.

4. The oil fume sensor according to claim 1, characterized in that, The inner wall of the sealing protrusion is formed with a second sidewall, and the outer wall of the sealing groove is formed with a first sidewall.

5. The oil fume sensor according to claim 1, characterized in that, The top cover has a hollow protective component protruding from it, and the inner edge of the protective component forms a second sidewall. The main control board has a socket protruding from it, and the periphery of the socket forms a first sidewall.

6. The oil fume sensor according to claim 1, characterized in that, The sensor assembly includes a transmitter, a receiver, and a lens. The accommodating cavity includes a second accommodating cavity, in which the transmitter and the receiver are housed. The housing includes a top cover and a bottom cover. The bottom cover includes a first shell and a first air inlet pipe passing through the first shell. The top cover, the first shell, and the lens surround and form the second accommodating cavity.

7. The oil fume sensor according to claim 6, characterized in that, The upper cover has a first sidewall formed on its peripheral wall, and the first shell has a protruding ring, the inner sidewall of which has a second sidewall formed.

8. The oil fume sensor according to claim 6, characterized in that, The housing also includes an exhaust cover, which has a receiving groove. The inner sidewall of the receiving groove forms a second sidewall. The first housing has a protruding ring, and the outer sidewall of the protruding ring forms the first sidewall.

9. The oil fume sensor according to claim 6, characterized in that, The housing further includes a fixing portion to limit the lens, wherein the outer sidewall of the lens is formed with a first sidewall, and the inner sidewall of the fixing portion is formed with a second sidewall. and / or The inner wall of the lens has a second sidewall, and the outer wall of the fixing part has a first sidewall.

10. A kitchen appliance, characterized in that, include: Box; The fan assembly is installed inside the housing; The fume sensor according to any one of claims 1 to 9 is installed in the housing.

Images