CN105675502B - Sensor and household electrical appliance for detecting attachment magnitude - Google Patents
Sensor and household electrical appliance for detecting attachment magnitude Download PDFInfo
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- CN105675502B CN105675502B CN201610195103.7A CN201610195103A CN105675502B CN 105675502 B CN105675502 B CN 105675502B CN 201610195103 A CN201610195103 A CN 201610195103A CN 105675502 B CN105675502 B CN 105675502B
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- 230000013011 mating Effects 0.000 claims description 20
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000003287 optical effect Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 239000000356 contaminant Substances 0.000 description 4
- 239000000779 smoke Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000035807 sensation Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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Abstract
The present invention discloses a kind of for detecting the sensor and household electrical appliance of attachment magnitude, wherein the sensor for detecting attachment magnitude includes mounting base, lens, circuit board, and light emitting part, the light receiving piece being electrically connected with circuit board；Wherein, one end of mounting base is equipped with recess portion, and the first vessel and the second vessel being connected to recess portion are equipped in mounting base；The side of the lens is equipped with transparent surface, and the other side is equipped with the plane of incidence and exit facet, and lens are mounted in recess portion and transparent surface exposes to recess portion；Light emitting part is mounted in the first vessel and is arranged towards the plane of incidence, and light receiving piece is mounted in the second vessel and is arranged towards exit facet.The present invention is used to detect sensor accuracy in detection, the reliable operation of attachment magnitude.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a sensor for detecting an attachment quantity value and a household appliance.
Background
At present, the surfaces of the electric appliances or the parts of the electric appliances exposed to the oil smoke environment, which are in contact with the oil smoke, are accumulated and attached with a layer of pollutants, such as liquid viscous oil stains, over time. These contaminants either affect the performance of the appliance or appliance components or deteriorate the hygienic environment of the appliance or appliance components. Therefore, there is a need for a sensor for sampling and detecting these contaminants in order to remind the user to clean or to have the appliance itself automatically trigger the cleaning process accordingly.
The photoelectric sensor for detecting the amount of the attached matter generally includes a lens and a plurality of optical elements disposed around the lens, wherein the lens has a light-transmitting surface for attaching the contaminant, and the optical elements project light to the light-transmitting surface and then receive the amount of light reflected by the attached matter to determine the amount of the attached matter. However, if the optical elements are not completely limited, the optical elements are susceptible to vibration, so that the mutual position accuracy of the optical elements is difficult to ensure, and the detection accuracy is low.
Disclosure of Invention
The invention provides a sensor for detecting the amount of an attached matter, and aims to provide a sensor for detecting the amount of the attached matter, which has good positioning and fixing of various optical elements and high detection accuracy.
In order to achieve the above object, the sensor for detecting the amount of the attached matter provided by the invention comprises a mounting seat, a lens, a circuit board, and a light emitting element and a light receiving element which are electrically connected with the circuit board; wherein,
a concave part is arranged at one end of the mounting seat, and a first containing cavity and a second containing cavity which are communicated with the concave part are arranged in the mounting seat;
one side of the lens is provided with a light-transmitting surface, the other side of the lens is provided with an incident surface and an emergent surface, the lens is arranged in the concave part, and the light-transmitting surface is exposed out of the concave part;
the light emitting piece is installed in the first containing cavity and faces the incident surface, and the light receiving piece is installed in the second containing cavity and faces the emergent surface.
Preferably, the mounting seat includes a first seat body and a second seat body which are opposite to each other, the first seat body has a first mating surface facing the second seat body, and the second seat body has a second mating surface facing the first seat body and attached to the first mating surface;
the first matching surface is provided with a first containing groove and a second containing groove, and the second matching surface is provided with a third containing groove and a fourth containing groove; the first containing groove and the third containing groove are enclosed to form the first containing cavity, and the second containing groove and the fourth containing groove are enclosed to form the second containing cavity.
Preferably, the first seat body is provided with a first avoiding groove on one side of the first accommodating groove far away from the concave part, the first avoiding groove is connected with the first accommodating groove, and the bottom wall surface of the first avoiding groove is lower than the first accommodating groove;
a third avoiding groove is formed in one side, far away from the concave part, of the third containing groove of the second seat body, the third avoiding groove is connected with the third containing groove, and the bottom wall surface of the third avoiding groove is lower than that of the third containing groove;
the light emitting piece is provided with a first flange on the circumferential surface of one end far away from the lens, and the first flange is abutted against the side wall surface, close to the concave part, of the first avoiding groove and the side wall surface, close to the concave part, of the third avoiding groove.
Preferably, a first limiting member is convexly disposed on a bottom wall surface of the third avoiding groove, and the first limiting member abuts against an end surface of the light emitting member, which is far away from the lens.
Preferably, the first flange is annularly arranged, the circumferential surface of the first flange is provided with a convex arc surface and a positioning plane connected with the convex arc surface, and the positioning plane is abutted to the bottom wall surface of the third avoiding groove.
Preferably, the first seat body is provided with a second avoiding groove on one side of the second accommodating groove far away from the concave part, the second avoiding groove is connected with the second accommodating groove, and the bottom wall surface of the second avoiding groove is lower than the second accommodating groove;
a fourth avoiding groove is formed in one side, far away from the concave part, of the fourth containing groove of the second seat body, the fourth avoiding groove is connected with the fourth containing groove, and the bottom wall surface of the fourth avoiding groove is lower than that of the fourth containing groove;
the peripheral surface of one end, far away from the lens, of the light receiving part is provided with a second flange, the second flange is abutted to the side wall surface, close to the concave part, of the second avoiding groove, and the side wall surface, close to the concave part, of the fourth avoiding groove.
Preferably, a second limiting member is convexly arranged on the bottom wall surface of the fourth avoiding groove, and the second limiting member abuts against the end surface, far away from the lens, of the light receiving member.
Preferably, a plurality of positioning grooves are formed in the first matching surface, and positioning protrusions matched with the positioning grooves are arranged on the second matching surface.
Preferably, the first matching surface is convexly provided with a buckling piece, and the second matching surface is provided with a buckling hole matched with the buckling piece.
Preferably, the first base and the second base are both provided with a limiting hole, and the circumferential surface of the lens is provided with a stopping protrusion adapted to the limiting hole.
Preferably, the lens further comprises a shell, the mounting seats are located in the shell, a window is arranged on the shell, and the light-transmitting surface of the lens is exposed at the window.
The invention also provides a household appliance, which comprises a sensor for detecting the amount of the attachments, wherein the sensor for detecting the amount of the attachments comprises a mounting seat, a lens, a circuit board, a light emitting element and a light receiving element, wherein the light emitting element and the light receiving element are electrically connected with the circuit board; wherein,
a concave part is arranged at one end of the mounting seat, and a first containing cavity and a second containing cavity which are communicated with the concave part are arranged in the mounting seat;
the lens is provided with a light-transmitting surface, an incident surface and an emergent surface which are positioned on one side of the light-transmitting surface, the lens is arranged in the concave part, and the light-transmitting surface is exposed out of the concave part;
the light emitting piece is installed in the first containing cavity and faces the incident surface, and the light receiving piece is installed in the second containing cavity and faces the emergent surface.
According to the sensor for detecting the amount of the attachments, the lens is arranged in the concave part, and the light emitting piece and the light receiving piece are respectively arranged in the first accommodating cavity and the second accommodating cavity, so that the lens, the light emitting piece and the light receiving piece can be limited by the mounting base and the mutual position relation of the lens, the light emitting piece and the light receiving piece can be determined, the detection accuracy can be guaranteed even in a vibration environment, and the working reliability of the sensor is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a sensor for detecting an amount of an attachment according to the present invention;
FIG. 2 is a schematic top view of the sensor for detecting the amount of the attached matter in FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along line III-III of FIG. 2;
FIG. 4 is a schematic front view of the sensor of FIG. 1 for detecting the amount of the attachment;
FIG. 5 is a schematic cross-sectional view taken along line V-V of FIG. 4;
FIG. 6 is a schematic cross-sectional view taken along line VI-VI in FIG. 4;
FIG. 7 is a schematic view of a partially exploded rear view of the sensor removing housing of FIG. 1 for detecting the amount of the attached matter;
FIG. 8 is a schematic view of an alternate angle of the structure of FIG. 7;
FIG. 9 is a schematic structural diagram illustrating an embodiment of a mounting base of the sensor for detecting the amount of the attachment of the present invention;
FIG. 10 is a schematic front view of the mount of FIG. 9;
FIG. 11 is a schematic cross-sectional view taken along line XI-XI in FIG. 10;
fig. 12 is a schematic structural view of the first seat in fig. 9;
fig. 13 is a schematic structural view of the first seat in fig. 12 at another angle;
fig. 14 is a schematic structural view of the second seat in fig. 9;
fig. 15 is a front view of the second seat in fig. 14.
Fig. 16 is a schematic view of a scene in which the sensor for detecting the amount of the attachments in fig. 1 is applied to the range hood.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 to 3 and fig. 9, in an embodiment, the sensor for detecting the amount of the attached matter includes a mounting base 1, a lens 2, a circuit board 3, and a light emitting element 4 and a light receiving element 5 electrically connected to the circuit board 3. Wherein,
one end of the mounting base 1 is provided with a concave portion 10a, and a first accommodating cavity 10b and a second accommodating cavity 10c which are communicated with the concave portion 10a are arranged in the mounting base 1.
The lens 2 has a light transmission surface 21 on one side and an incident surface 22 and an exit surface 23 on the other side, and the lens 2 is mounted in the recess 10a with the light transmission surface 21 exposed from the recess 10 a.
The light emitting element 4 is installed in the first receiving cavity 10b and disposed toward the incident surface 22, and the light receiving element 5 is installed in the second receiving cavity 10c and disposed toward the exit surface 23.
The circuit board 3 is used for driving the light emitting element 4 to emit light, receiving the light sensation quantity signal of the light receiving element 5, and judging the attachment condition of the attachment at the light transmission surface 21 according to the light sensation quantity signal.
In the present embodiment, the mounting base 1 is used for fixing the light emitting element 4, the light receiving element 5 and the lens 2. Meanwhile, the mounting base 1 can prevent ambient light from entering the lens 2 from a part other than the light-transmitting surface 21 of the lens 2 or from directly entering the light receiving element 5.
The lens 2 is made of transparent material so that light can be transmitted inside the lens 2 conveniently. The outer side of the light-transmitting surface 21 is a sampling surface of the attached matter, and the change of the amount of the attached matter at the light-transmitting surface 21 is positively correlated with the change of the light output amount at the light-emitting surface 23. Preferably, the incident surface 22 is connected to the periphery of the exit surface 23, and the exit surface 23 and the incident surface 22 enclose a trapezoid or polyhedron boss on one side of the light transmission surface 21.
Generally, the light emitting member 4 is used to apply infrared light of a specific wavelength to the light transmitting surface 21. The light receiving element 5 receives light reflected from the light transmission surface 21 and converts the received light signal into an electrical signal.
The circuit board 3 is provided with a driving module for driving the light emitting element 4 to emit light, a signal amplifying module for processing the electric signal of the light receiving element 5, a storage module storing a light quantity reference value or other application programs, and a processing module for calculating or evaluating the value of the attached matter. The reference value of the light quantity can be obtained when the outer side surface of the light transmission surface 21 is in a clean state or completely covered by the attached matter.
The sensor for detecting the amount of the attachments of the invention is characterized in that the lens 2 is arranged in the concave part 10a, and the light emitting element 4 and the light receiving element 5 are respectively arranged in the first containing cavity 10b and the second containing cavity 10c, thus the lens 2, the light emitting element 4 and the light receiving element 5 can be limited by the mounting seat 1 and the mutual position relation of the three elements can be determined, thus the detection accuracy can be ensured even in a vibration environment, and the working reliability of the sensor is improved.
Further, referring to fig. 4 to 9 and fig. 12 to 15, in an embodiment, the mounting base 1 includes a first base 11 and a second base 12 opposite to each other, the first base 11 has a first mating surface 110 facing the second base 12, and the second base 12 has a second mating surface 120 facing the first base 11 and attached to the first mating surface 110.
The first mating surface 110 is formed with a first receiving groove 111 and a second receiving groove 112, and the second mating surface 120 is formed with a third receiving groove 121 and a fourth receiving groove 122. The first accommodating groove 111 and the third accommodating groove 121 enclose to form a first accommodating cavity 10b, and the second accommodating groove 112 and the fourth accommodating groove 122 enclose to form a second accommodating cavity 10 c.
In this embodiment, by dividing the mounting base 1 into two halves, during assembly, each optical element, including the lens 2, the light emitting element 4 and the light receiving element 5, can be mounted on one of the halves, for example, the second base 12, and then the first base 11 is covered on the second base 12. Therefore, the optical elements can be conveniently positioned and mounted, and the first seat 11 and the second seat 12 can be fixed by a buckle structure or an adhesive.
Further, the first seat 11 is provided with a first avoiding groove 113 on a side of the first accommodating groove 111 far away from the concave portion 10a, the first avoiding groove 113 is connected to the first accommodating groove 111, and a bottom wall surface of the first avoiding groove 113 is lower than the first accommodating groove 111.
The second seat 12 is provided with a third avoiding groove 123 on a side of the third accommodating groove 121 far away from the recess 10a, the third avoiding groove 123 is connected with the third accommodating groove 121, and a bottom wall surface of the third avoiding groove 123 is lower than the third accommodating groove 121.
A first flange 41 is provided on the circumferential surface of the end of the light emitting element 4 remote from the lens 2, and the first flange 41 abuts against the side wall surface of the first avoiding groove 113 near the recess 10a and the side wall surface of the third avoiding groove 123 near the recess 10 a.
In this embodiment, the bottom wall surface of the first avoiding groove 113 is the groove wall surface of the first avoiding groove 113 facing the second seat 12 or the groove wall surface opposite to the second matching surface 120, and a step for limiting the first flange 41 is formed between the first avoiding groove 113 and the first accommodating groove 111. Preferably, the bottom wall surface of the first avoiding groove 113 is parallel to the first mating surface 110.
Similarly, the bottom wall surface of the third avoiding groove 123 is the wall surface of the third avoiding groove 123 facing the first seat 11 or the wall surface opposite to the first matching surface 110, and a step for limiting the first flange 41 is also formed between the third avoiding groove 123 and the third accommodating groove 121. Preferably, the bottom wall surface of the first avoiding groove 113 is parallel to the second mating surface 120.
The light emitting member 4 can be positioned in a direction close to the incident surface 22 by providing the first flange 41. The circumferential surface of the light emitting member 4 is preferably a cylindrical surface whose axis is perpendicular to the incident surface 22, so that the amount of incident light can be increased accordingly.
Further, a first limiting member 125 is convexly disposed on a bottom wall surface of the third avoiding groove 123, and the first limiting member 125 abuts against an end surface of the light emitting member 4 far away from the lens 2.
In this embodiment, the first limiting member 125 is formed by extending from the bottom wall of the third avoiding groove 123 to a direction close to the first seat 11. By providing the first stopper 125, the light emitting element 4 can be restrained in the direction away from the incident surface 22, and in combination with the first flange 41 of the previous embodiment, the degree of freedom of the light emitting element 4 in the directions away from and toward the incident surface 22 is restricted, and thus, a relatively determined positional relationship between the light emitting element 4 and the lens 2 is ensured.
Further, the first flange 41 is disposed annularly, and the circumferential surface of the first flange 41 has a convex arc surface 411 and a positioning plane 412 connected to the convex arc surface 411, and the positioning plane 412 abuts against the bottom wall surface of the third avoiding groove 123.
In the present embodiment, since the pins or the input/output interfaces of the light emitting element 4 generally have polarity, i.e. have difference between positive and negative polarities, in order to prevent the light emitting element 4 from being connected with the circuit board 3 reversely, the first flange 41 is configured as an annular flange with a flat cut-off. Specifically, when the light emitting element 4 is mounted on the second seat 12, if the convex arc surface 411 faces the second seat 12, the convex arc surface 411 interferes with the bottom wall surface of the third avoiding groove 123, so that the light emitting element 4 cannot be correctly matched with the third accommodating groove 121; only when the positioning plane 412 is engaged with the bottom wall surface of the third avoiding groove 123, the light emitting member 4 can be properly engaged with the third receiving groove 121.
Further, the first seat 11 is provided with a second avoiding groove 114 on a side of the second accommodating groove 112 far away from the concave portion 10a, the second avoiding groove 114 is connected with the second accommodating groove 112, and a bottom wall surface of the second avoiding groove 114 is lower than the second accommodating groove 112.
The second seat 12 is provided with a fourth avoiding groove 124 on a side of the fourth accommodating groove 122 away from the concave portion 10a, the fourth avoiding groove 124 is connected to the fourth accommodating groove 122, and a bottom wall surface of the fourth avoiding groove 124 is lower than the fourth accommodating groove 122.
A second flange 51 is provided on the circumferential surface of the light receiving element 5 at the end away from the lens 2, and the second flange 51 abuts against the side wall surface of the second clearance groove 114 close to the recess 10a and the side wall surface of the fourth clearance groove 124 close to the recess 10 a.
In this embodiment, the bottom wall surface of the second avoiding groove 114 is a groove wall surface of the second avoiding groove 114 facing the second seat 12 or a groove wall surface opposite to the second matching surface 120, and a step for limiting the second flange 51 is formed between the second avoiding groove 114 and the second accommodating groove 112. Preferably, the bottom wall of the second avoiding groove 114 is parallel to the first mating surface 110.
Similarly, the bottom wall surface of the fourth avoiding groove 124 is the groove wall surface of the fourth avoiding groove 124 facing the first seat 11 or the groove wall surface opposite to the first matching surface 110, and a step for limiting the second flange 51 is also formed between the fourth avoiding groove 124 and the fourth accommodating groove 122.
The light receiving element 5 can be positioned in a direction close to the exit face 23 by providing the second flange 51. Preferably, the peripheral surface of the light receiving element 5 is a cylindrical surface, and the axis thereof is perpendicular to the incident surface 22, so that the light receiving degree can be increased accordingly.
Further, a second limiting member 126 is disposed on the bottom wall surface of the fourth avoiding groove 124 in a protruding manner, and the second limiting member 126 abuts against the end surface of the light receiving element 5 away from the lens 2.
In the present embodiment, the light receiving element 5 can be limited in the direction away from the exit surface 23 by providing the second limiting member 126, and in combination with the second flange 51 of the previous embodiment, the degree of freedom of the light receiving element 5 in the direction away from and close to the exit surface 23 is limited, so that the relative determined positional relationship between the light receiving element 5 and the lens 2 is ensured on the premise that the light receiving element 5 can be detachably mounted.
Furthermore, the first mating surface 110 is provided with a plurality of positioning grooves 115, and the second mating surface 120 is provided with positioning protrusions 127 adapted to the positioning grooves 115.
In this embodiment, the positioning groove 115 is engaged with the positioning protrusion 127, so as to position the first seat 11 and the second seat 12, and prevent the first seat 11 and the second seat 12 from moving along the first mating surface 110 or the second mating surface 120.
Further, referring to fig. 10 and fig. 11, in an embodiment, the first engagement surface 110 is convexly provided with a locking member 116, and the second engagement surface 120 is provided with a locking hole 128 adapted to the locking member 116.
In this embodiment, the first seat 11 and the second seat 12 are fixed simply and quickly by a snap-fit manner. Preferably, the incident surface 22 and the exit surface 23 are arranged at an obtuse angle, the rear surfaces of the light emitting element 4 and the light receiving element 5 are both cylindrical surfaces, the axis of the light emitting element 4 is perpendicular to the incident surface 22, the axis of the light receiving element 5 is perpendicular to the exit surface 23, and the locking element 116 is located between the first accommodating groove 111 and the second accommodating groove 112.
Further, referring to fig. 5, fig. 7 to fig. 10, and fig. 12 to fig. 15, the first seat 11 and the second seat 12 are both provided with a limiting hole 117, and the circumferential surface of the lens 2 is provided with a stopping protrusion 24 adapted to the limiting hole 117.
In the present embodiment, the stop protrusion 24 is engaged with the limiting hole 117, so that the lens 2 is prevented from falling off from the concave portion 10a, and the lens 2 is detachably connected to the mounting base 1.
Further, referring to fig. 1 to 6 again, the sensor for detecting the amount of the attached matter further includes a housing 6, the mounting seats 1 are all located in the housing 6, a window 61 is disposed on the housing 6, and the light-transmitting surface 21 of the lens 2 is exposed at the window 61.
In the present embodiment, the housing 6 is used to encapsulate the mounting base 1, so as to further improve the protection strength and prevent external contaminants from invading into the mounting base 1.
The present invention further provides a household appliance, which includes a sensor for detecting an attachment quantity value, and the specific structure of the sensor for detecting an attachment quantity value refers to the foregoing embodiments.
In the present embodiment, the household appliances include, but are not limited to, range hoods, disinfection cabinets, air purifiers, and the like. Referring to fig. 16, in an example, the household appliance is a range hood 100, the cooking bench 200 is located below the range hood 100, the range hood 100 includes a sensor 101 for detecting an attachment amount, a display module 102 and a voice prompt module 103, wherein,
the sensor 101 for detecting the amount of the attachments is installed inside the range hood 100, and at least the light-transmitting surface 311 of the lens 2 is exposed in the inner cavity or the smoke exhaust duct of the range hood. Preferably, the light-transmitting face 21 is perpendicular to the horizontal plane.
The display module 102 displays the amount detected by the sensor 101 for detecting the amount of the attached matter, for example, the amount of the attached matter remaining on the lens 2 after the range hood is cleaned.
The voice prompt module 103 is used for reminding a user to start a cleaning program of the range hood 100 when a detection value of the sensor 101 for detecting an attachment quantity value reaches a certain threshold value.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (12)
1. A sensor for detecting the amount of attachments is characterized by comprising a mounting seat, a lens, a circuit board, a light emitting piece and a light receiving piece, wherein the light emitting piece and the light receiving piece are electrically connected with the circuit board; wherein,
a concave part is arranged at one end of the mounting seat, and a first containing cavity and a second containing cavity which are communicated with the concave part are arranged in the mounting seat;
one side of the lens is provided with a light-transmitting surface, the other side of the lens is provided with an incident surface and an emergent surface, the lens is arranged in the concave part, and the light-transmitting surface is exposed out of the concave part;
the light emitting piece is arranged in the first accommodating cavity and faces the incident surface, and the light receiving piece is arranged in the second accommodating cavity and faces the emergent surface;
the mounting seat is provided with a position avoiding groove at one end of the first cavity far away from the concave part, the position avoiding groove is connected with the first cavity, and the bottom wall surface of the position avoiding groove is lower than the first cavity;
the peripheral surface of one end, far away from the lens, of the light emitting piece is provided with a first flange, and the first flange is abutted to the side wall surface, close to the concave part, of the avoiding groove.
2. The sensor according to claim 1, wherein the mounting seat comprises a first seat body and a second seat body which are opposite to each other, the first seat body has a first mating surface facing the second seat body, the second seat body has a second mating surface facing the first seat body and fitting with the first mating surface;
the first matching surface is provided with a first containing groove and a second containing groove, and the second matching surface is provided with a third containing groove and a fourth containing groove; the first containing groove and the third containing groove are enclosed to form the first containing cavity, and the second containing groove and the fourth containing groove are enclosed to form the second containing cavity.
3. The sensor for detecting the amount of the attached matter according to claim 2, wherein the avoiding groove comprises a first avoiding groove disposed on a side of the first seat body away from the concave portion, the first avoiding groove is connected to the first containing groove, and a bottom wall surface of the first avoiding groove is lower than the first containing groove;
the position avoiding groove further comprises a third position avoiding groove which is arranged on one side, far away from the concave part, of the third containing groove of the second seat body, the third position avoiding groove is connected with the third containing groove, and the bottom wall surface of the third position avoiding groove is lower than the third containing groove;
the first flange abuts against a side wall surface of the first avoiding groove close to the concave portion and a side wall surface of the third avoiding groove close to the concave portion.
4. The sensor according to claim 3, wherein a first stopper is protruded from a bottom wall surface of the third avoiding groove, and the first stopper abuts against an end surface of the light emitting element away from the lens.
5. The sensor for detecting the amount of the attached matter according to claim 3 or 4, wherein the first flange is annularly arranged, a circumferential surface of the first flange has a convex arc surface and a positioning plane connected with the convex arc surface, and the positioning plane abuts against a bottom wall surface of the third avoiding groove.
6. The sensor for detecting the amount of the attached matter according to claim 2, wherein the first seat has a second avoiding groove on a side of the second receiving groove away from the recess, the second avoiding groove is connected to the second receiving groove, and a bottom wall surface of the second avoiding groove is lower than the second receiving groove;
a fourth avoiding groove is formed in one side, far away from the concave part, of the fourth containing groove of the second seat body, the fourth avoiding groove is connected with the fourth containing groove, and the bottom wall surface of the fourth avoiding groove is lower than that of the fourth containing groove;
and a second flange is arranged on the circumferential surface of one end, far away from the lens, of the light receiving part, and the second flange is abutted against the side wall surface, close to the concave part, of the second avoiding groove and the side wall surface, close to the concave part, of the fourth avoiding groove.
7. The sensor according to claim 6, wherein a second stopper is disposed on a bottom surface of the fourth avoiding groove, and the second stopper abuts against an end surface of the light receiving element away from the lens.
8. The sensor for detecting the amount of the attached matter according to claim 2, wherein the first mating surface is provided with a plurality of positioning grooves, and the second mating surface is provided with positioning protrusions adapted to the positioning grooves.
9. The sensor for detecting the amount of the attached matter according to claim 2, wherein the first engagement surface is provided with a locking member, and the second engagement surface is provided with a locking hole adapted to the locking member.
10. The sensor according to claim 2, wherein the first base and the second base have a position-limiting hole, and the lens has a protrusion fitting the position-limiting hole on the circumferential surface.
11. The sensor according to claim 1, further comprising a housing, wherein the mounting seats are located in the housing, the housing has a window, and the light-transmitting surface of the lens is exposed to the window.
12. A household appliance comprising a sensor for detecting the amount of an attachment according to any one of claims 1 to 11.
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| CN201610195103.7A CN105675502B (en) | 2016-03-30 | 2016-03-30 | Sensor and household electrical appliance for detecting attachment magnitude |
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| US20090059620A1 (en) * | 2007-08-28 | 2009-03-05 | Chunghwa Picture Tubes, Ltd. | Back light module |
| CN201993476U (en) * | 2011-01-06 | 2011-09-28 | 成都虹岳科技有限公司 | Lens pollution detection device and road condition detector |
| CN202563457U (en) * | 2012-04-10 | 2012-11-28 | 郑国书 | Dustproof input device optical lens module |
| CN103852836A (en) * | 2012-11-29 | 2014-06-11 | 鸿富锦精密工业（深圳）有限公司 | Photoelectric conversion device |
| CN203666235U (en) * | 2013-10-25 | 2014-06-25 | 东莞市杰乐盛世运动用品有限公司 | Light emitting device |
| CN105180090A (en) * | 2015-09-25 | 2015-12-23 | 中山市翰锋照明有限公司 | LED lens assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6178000B1 (en) * | 1998-07-08 | 2001-01-23 | International Business Machines Corporation | Monolithic symmetric interferometer for generation of variable-periodicity patterns for lithography |
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|---|---|---|---|---|
| US20090059620A1 (en) * | 2007-08-28 | 2009-03-05 | Chunghwa Picture Tubes, Ltd. | Back light module |
| CN201993476U (en) * | 2011-01-06 | 2011-09-28 | 成都虹岳科技有限公司 | Lens pollution detection device and road condition detector |
| CN202563457U (en) * | 2012-04-10 | 2012-11-28 | 郑国书 | Dustproof input device optical lens module |
| CN103852836A (en) * | 2012-11-29 | 2014-06-11 | 鸿富锦精密工业（深圳）有限公司 | Photoelectric conversion device |
| CN203666235U (en) * | 2013-10-25 | 2014-06-25 | 东莞市杰乐盛世运动用品有限公司 | Light emitting device |
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| CN105675502A (en) | 2016-06-15 |
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