Air conditioner evaporator dust detection device and self-cleaning air conditioner

Abstract

The embodiment of the utility model discloses an air conditioner evaporator dust detection device and a self-cleaning air conditioner, a light emitting diode is used for emitting light to the surface of a detected air conditioner evaporator, the to-be-detected surface of the air conditioner evaporator can reflect the light to a light receiving detection piece, and due to the light diffuse reflection principle, when the to-be-detected surface of the air conditioner evaporator does not have dust, the light receiving detection piece can detect the dust on the to-be-detected surface of the air conditioner evaporator. When dust exists on the to-be-detected surface of the air conditioner evaporator, the light paths reflected by the to-be-detected surface are different, so that the distribution of the light reflected by the to-be-detected surface can be analyzed through the light receiving detection assembly, and the dust accumulation amount of the to-be-detected surface can be analyzed and determined. According to the technical scheme, the problems that the surface of the air conditioner evaporator is complex and the dust thickness is inconvenient to detect are solved, when the air conditioner detection device detects that dust on the surface of the air conditioner evaporator exceeds the standard, the self-cleaning function of the air conditioner can be started, and therefore the problem that the starting time of the self-cleaning function of the air conditioner cannot be determined is solved.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of photoelectric sensor, and particularly relates to a dust detection device for an air conditioner evaporator and a self-cleaning air conditioner. BACKGROUND

[0002] With the improvement of the use requirement of the air conditioner, the user hopes to reduce the maintenance work of the air conditioner while enjoying the comfortable environment. The traditional air conditioner is easy to accumulate dust and mold in the interior after being used for a period of time, which leads to the decline of the refrigeration effect and air pollution, and thus the self-cleaning function is developed. When the air conditioner enters the self-cleaning function, the water in the air entering the interior of the air conditioner is condensed into water vapor through the temperature difference generated by the evaporator of the indoor unit, and when the temperature is lower than zero, the frost is formed on the surface of the evaporator, and then the water droplets after defrosting flow to drive the dust and bacteria to be discharged through the condensate drain pipe, and finally the evaporator of the indoor unit is cleaned.

[0003] Then, under what condition will the air conditioner use the self-cleaning function? This requires dust detection on the surface of the evaporator. At present, the detection technology for the dust on the surface of the evaporator in the air conditioner is still in the blank field. Although there are sensors for dust detection on the surface of other objects, the surface of the evaporator of the air conditioner is complex and is composed of a condensing pipe and fins, and the non-uniformity of the surface leads to that the general dust detection is not suitable for being applied to the surface of the evaporator of the air conditioner. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at solving one of the technical problems in the prior art or related art.

[0005] Therefore, the first aspect of the utility model provides a dust detection device for an air conditioner evaporator.

[0006] The second aspect of the utility model provides a self-cleaning air conditioner.

[0007] Therefore, the first aspect of the utility model provides a dust detection device for an air conditioner evaporator.

[0008] The light-emitting diode is used for emitting light to the surface of the measured air conditioner evaporator;

[0009] The shaping lens group is arranged between the surface of the measured air conditioner evaporator and the light-emitting diode;

[0010] The light-receiving detection component is used for detecting the distribution of the reflected light of the surface of the measured air conditioner evaporator;

[0011] The warning indicator is electrically connected to the light-receiving detection component.

[0012] In an embodiment, the method further comprises:

[0013] A printed circuit board, the light emitting diode and the light receiving detection component are integrated on the printed circuit board.

[0014] In an embodiment, the method further comprises:

[0015] A housing, the light emitting diode, the light shaping lens group and the light receiving detection component are arranged in the housing, one side of the housing is parallel to the surface of the evaporator of the air conditioner to be measured, and the side of the housing parallel to the surface of the evaporator of the air conditioner to be measured is flat and transparent.

[0016] In an embodiment, the light shaping lens group comprises:

[0017] A light emitting shaping lens, the light emitting shaping lens is used for shaping the light beam emitted by the light emitting diode to the surface of the evaporator of the air conditioner to be measured;

[0018] A light receiving shaping lens, the light receiving shaping lens is used for shaping the light reflected by the surface of the evaporator of the air conditioner to be measured.

[0019] In an embodiment, the light shaping lens group further comprises:

[0020] An optical baffle, the optical baffle is arranged between the light emitting shaping lens and the light receiving shaping lens.

[0021] In an embodiment, the light emitting shaping lens is a conical shaping lens;

[0022] The light receiving shaping lens is an arc-shaped shaping lens.

[0023] In an embodiment, the light receiving detection component comprises:

[0024] A first phototriode;

[0025] A second phototriode;

[0026] A third phototriode, the first phototriode, the second phototriode and the third phototriode are arranged in a linear type with the light emitting diode, and the distances from the light emitting diode are from near to far.

[0027] In an embodiment, the light emitting diode and the light receiving detection component are parallel to the surface of the evaporator of the air conditioner to be measured and the distance is 10 mm.

[0028] According to a second aspect of the embodiment of the application, a self-cleaning air conditioner is provided, comprising: an air conditioner body;

[0029] The air conditioner evaporator dust detection device of any one of the above, the air conditioner evaporator surface dust accumulation detection device is arranged in the air conditioner interior;

[0030] The air conditioner evaporator, the air conditioner evaporator dust detection device is arranged in the air conditioner interior, and the detection end faces the measured surface of the air conditioner evaporator;

[0031] The cleaning assembly is electrically connected to the air conditioner evaporator dust detection device.

[0032] According to the third aspect of the embodiment of the application, an air conditioner self-cleaning method is provided, which is applied to the self-cleaning air conditioner in the above, and includes the following steps:

[0033] The air conditioner evaporator surface dust accumulation detection device is set to start at an interval time.

[0034] When the start time is reached, the air conditioner evaporator dust detection device starts.

[0035] The air conditioner evaporator dust detection device detects the dust accumulation of the measured surface of the air conditioner evaporator.

[0036] If the dust accumulation does not reach the threshold value, the process is ended.

[0037] If the dust accumulation reaches the threshold value, the air conditioner evaporator dust detection device starts the cleaning assembly, and the cleaning assembly cleans the air conditioner evaporator.

[0038] After the cleaning assembly finishes cleaning, the air conditioner evaporator dust detection device detects the measured surface of the air conditioner evaporator again.

[0039] If the dust accumulation does not reach the threshold value, the process is ended.

[0040] If the dust accumulation reaches the threshold value, the process returns to the step of the air conditioner evaporator dust detection device, wherein the cleaning assembly cleans the air conditioner evaporator.

[0041] Compared with the prior art, the utility model at least has the following beneficial effects: wherein, the light emitting diode is used for emitting light to the surface of the measured air conditioner evaporator, and the to-be-detected surface of the air conditioner evaporator reflects the light to the light receiving detection piece, and due to the light diffusion reflection principle, when the to-be-detected surface of the air conditioner evaporator has no dust, the reflected light path is different from that when the to-be-detected surface of the air conditioner evaporator has dust, for example, the more dust accumulated on the surface of the air conditioner evaporator, the more obvious the light diffusion reflection phenomenon, therefore, the distribution of the light reflected by the to-be-detected surface can be analyzed by the light receiving detection assembly, so that the dust accumulation of the to-be-detected surface can be analyzed and determined.

[0042] The shaping lens group is used for beam pointing control of light emitted by the light emitting diode, and the light emitted by the light emitting diode passes through the shaping lens group to reach the air conditioner evaporator, so that the light can be concentrated on the surface to be detected of the air conditioner evaporator, and the diffuse reflection of the light passing through the shaping lens group can make the light accurately act on the light receiving detection assembly. The setting adjusts the light path, increases the light that can be accepted by the light receiving detection assembly, and reduces the requirement for the sensitivity of the light receiving detection assembly.

[0043] The technical scheme overcomes the problem that the surface of the air conditioner evaporator is complex and inconvenient to detect the dust thickness by using the diffuse reflection principle of light. When the air conditioner detection device detects that the dust on the surface of the air conditioner evaporator exceeds the standard, the self-cleaning function of the air conditioner can be started, thereby solving the problem that the starting time of the self-cleaning function of the air conditioner cannot be determined. BRIEF DESCRIPTION OF DRAWINGS

[0044] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments and are not intended to limit the scope of the present application. Moreover, the same reference numerals are used throughout the various drawings to designate similar or equivalent parts. In the drawings:

[0045] Figure 1 A cross-sectional structural block diagram of an air conditioner evaporator dust detection device according to an embodiment of the present application;

[0046] Figure 2 A structural block diagram of a housing of an air conditioner evaporator dust detection device according to an embodiment of the present application;

[0047] Figure 3 A schematic diagram of light flux received by a first phototriode in mirror reflection according to an embodiment of the present application;

[0048] Figure 4 A schematic diagram of light flux received by a first phototriode in 20% diffusion according to an embodiment of the present application;

[0049] Figure 5 A schematic diagram of light flux received by a first phototriode in 40% diffusion according to an embodiment of the present application;

[0050] Figure 6 A schematic diagram of light flux received by a first phototriode in 60% diffusion according to an embodiment of the present application;

[0051] Figure 7 A schematic diagram of light flux received by a first phototriode in 80% diffusion according to an embodiment of the present application;

[0052] Figure 8A second phototriode in an embodiment provided by the present application in a schematic diagram of light flux received by specular reflection;

[0053] Figure 9 A second phototriode in an embodiment provided by the present application in a schematic diagram of light flux received by 20% diffuse reflection;

[0054] Figure 10 A second phototriode in an embodiment provided by the present application in a schematic diagram of light flux received by 40% diffuse reflection;

[0055] Figure 11 A second phototriode in an embodiment provided by the present application in a schematic diagram of light flux received by 60% diffuse reflection;

[0056] Figure 12 A second phototriode in an embodiment provided by the present application in a schematic diagram of light flux received by 80% diffuse reflection;

[0057] Figure 13 A third phototriode in an embodiment provided by the present application in a schematic diagram of light flux received by specular reflection;

[0058] Figure 14 A third phototriode in an embodiment provided by the present application in a schematic diagram of light flux received by 20% diffuse reflection;

[0059] Figure 15 A third phototriode in an embodiment provided by the present application in a schematic diagram of light flux received by 40% diffuse reflection;

[0060] Figure 16 A third phototriode in an embodiment provided by the present application in a schematic diagram of light flux received by 60% diffuse reflection;

[0061] Figure 17 A third phototriode in an embodiment provided by the present application in a schematic diagram of light flux received by 80% diffuse reflection;

[0062] Wherein, Figures 1-2 The correspondence between the reference signs and the component names is as follows:

[0063] 100, light emitting diode; 200, shaping lens group; 300, light receiving detection assembly; 400, housing; 500, printed circuit board;

[0064] 210, light emitting shaping lens; 220, light receiving shaping lens; 230, optical baffle;

[0065] 310, first phototriode; 320, second phototriode; 330, third phototriode. DETAILED DESCRIPTION

[0066] In order to better understand the above technical solutions, the technical solutions of the embodiments of the present application are described in detail below through the drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application. In the case of no conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0067] As shown in Figures 1-2 According to the first aspect of the embodiments of the present application, a dust detection device for an air conditioner evaporator is provided, which comprises: a light emitting diode 100, which is used to emit light to the surface of the measured air conditioner evaporator; a shaping lens group 200, which is arranged between the surface of the measured air conditioner evaporator and the light emitting diode 100; a light receiving detection assembly 300, which is used to detect the distribution of the reflected light of the surface of the measured air conditioner evaporator; and a warning device, which is electrically connected to the light receiving detection assembly.

[0068] The dust detection device for an air conditioner evaporator provided by the embodiments of the present application comprises a light emitting diode 100, a shaping lens group 200, and a light receiving detection assembly 300.

[0069] The light emitting diode 100 is used to emit light to the surface of the measured air conditioner evaporator. The surface to be detected of the air conditioner evaporator reflects the light to the light receiving detection component. According to the principle of diffuse reflection of light, the reflected light path is different when the surface to be detected of the air conditioner evaporator has no dust and when the surface to be detected of the air conditioner evaporator has dust. For example, the more dust accumulated on the surface of the air conditioner evaporator, the more obvious the diffuse reflection of light. Therefore, the distribution of the reflected light of the detected surface can be analyzed by the light receiving detection assembly 300, so as to analyze and determine the amount of dust accumulation on the detected surface.

[0070] The shaping lens group 200 is used to control the beam pointing of the light emitted by the light emitting diode 100. The light emitted by the light emitting diode 100 passes through the shaping lens group 200 to reach the air conditioner evaporator, so that the light can be concentrated and irradiated on the surface to be detected of the air conditioner evaporator. At the same time, the diffusely reflected light of the air conditioner evaporator passes through the shaping lens group 200, so that the light accurately acts on the light receiving detection assembly 300. This arrangement adjusts the light path, increases the light that can be accepted by the light receiving detection assembly 300, and reduces the requirement for the sensitivity of the light receiving detection assembly 300.

[0071] The technical solution overcomes the problem that the surface of the air conditioner evaporator is complex and it is not convenient to detect the thickness of dust by using the principle of diffuse reflection of light. When the air conditioner detection device detects that the dust on the surface of the air conditioner evaporator exceeds the standard, the self-cleaning function of the air conditioner can be started, thereby solving the problem that the starting time of the self-cleaning function of the air conditioner cannot be determined.

[0072] Wherein, the technical scheme further comprises a warning device, when the light receiving detection assembly detects that the dust accumulation amount of the air conditioner evaporator exceeds the standard for three times in succession, whether the cleaning system of the air conditioner is malfunctioning or the dust detection device itself is malfunctioning is considered, and the warning device issues a warning to inform the user to perform maintenance.

[0073] As shown in Figures 1-2 The light emitting diode 100 and the light receiving detection assembly 300 are integrally arranged on the printed circuit board 500.

[0074] In the technical scheme, the light emitting diode 100 and the light receiving detection assembly 300 are integrated on the printed circuit board 500, which first increases the integration of the dust detection device, and meanwhile the printed circuit board 500 can amplify the circuit design and detect the tiny current change to realize accurate sensing and effectively improve the accuracy of dust detection.

[0075] As shown in Figures 1-2 The light emitting diode 100, the shaping lens group 200 and the light receiving detection assembly 300 are arranged inside the shell 400, one side of the shell 400 is parallel to the surface of the air conditioner evaporator to be detected, and the side of the shell 400 parallel to the surface of the air conditioner evaporator to be detected is flat and light-transmitting.

[0076] In the technical scheme, the light emitting diode 100, the shaping lens group 200 and the light receiving detection assembly 300 are arranged inside the shell 400, the arrangement of the shell 400 can improve the integrity of the dust detection assembly, and meanwhile the shell 400 can isolate the interference of external light on the dust detection assembly to further improve the accuracy of the dust detection assembly.

[0077] It can be understood that one side surface of the shell 400 is parallel to the surface of the air conditioner evaporator to be detected, and the side surface of the shell 400 is made of high light-transmitting material, and the other surfaces of the shell 400 are made of non-light-transmitting material.

[0078] As shown in Figures 1-2 The shaping lens group 200 comprises a light emitting shaping lens 210 and a light receiving shaping lens 220, wherein the light emitting shaping lens 210 is used for shaping the light beam emitted by the light emitting diode 100 to the surface of the air conditioner evaporator to be detected, and the light receiving shaping lens 220 is used for shaping the light reflected by the surface of the air conditioner evaporator to be detected.

[0079] In the technical scheme, the shaping lens group 200 comprises the light emitting shaping lens 210 and the light receiving shaping lens 220, wherein the light emitting shaping lens 210 is used for adjusting the light emitted by the light emitting diode 100 so that the light can more concentratedly irradiate the air conditioner evaporator.

[0080] The light shaping lens group 200 further comprises an optical baffle 230, which is arranged between the light emitting shaping lens 210 and the light receiving shaping lens 220.

[0081] As shown in Figures 1-2 The light shaping lens group 200 further comprises an optical baffle 230, which is arranged between the light emitting shaping lens 210 and the light receiving shaping lens 220.

[0082] In the technical scheme, the light shaping lens group 200 further comprises an optical baffle 230, which is arranged between the light emitting shaping lens 210 and the light receiving shaping lens 220. It can be understood that the optical baffle 230 is also arranged between the light emitting diode 100 and the light receiving detection assembly 300. The optical baffle 230 is made of non-transparent material. This arrangement can avoid the light emitted by the light emitting diode 100 directly irradiating the light receiving detection assembly 300 and affecting the analysis and judgment of the light receiving detection assembly 300.

[0083] As shown in Figures 1-2 The light emitting shaping lens 210 is a conical shaping lens, and the light receiving shaping lens 220 is an arch-shaped shaping lens.

[0084] In the technical scheme, the light emitting shaping lens 210 is a conical shaping lens. This arrangement can make the radial light emitted by the light emitting diode 100 more concentrated on the air conditioner evaporator.

[0085] The light receiving shaping lens 220 is an arch-shaped shaping lens. This arrangement can integrate the light reflected by the air conditioner evaporator into a long strip of light, which is convenient for the light receiving detection assembly 300 to analyze the reflected light.

[0086] As shown in Figures 1-2 The light receiving detection assembly 300 comprises a first photosensitive triode 310, a second photosensitive triode 320, and a third photosensitive triode 330. The first photosensitive triode 310, the second photosensitive triode 320, and the third photosensitive triode 330 are arranged in a linear type with the light emitting diode 100, and the distance from the light emitting diode 100 is from near to far.

[0087] In the technical scheme, the light receiving detection assembly 300 comprises a first photosensitive triode 310, a second photosensitive triode 320, and a third photosensitive triode 330. At the same time, the first to third photosensitive triodes 330 are arranged in a linear type, and the first photosensitive triode 310 is closest to the light emitting diode 100.

[0088] In the air conditioner, the first photosensitive triode 310 is on the light path of the light emitted by the light emitting diode 100 after being refracted by the air conditioner evaporator.

[0089] It can be understood that the less dust on the surface of the air conditioner evaporator, the smoother the surface, the more the amount of light refraction and the less the amount of diffuse reflection. When the dust on the air conditioner evaporator increases, the diffuse reflection generated by the air conditioner evaporator increases, thereby causing the change of the light path and the change of the light flux passing through the three photosensitive triodes.

[0090] Through the analysis of the light flux received by the first to third photosensitive sensors, the dust accumulation amount on the surface of the air conditioner evaporator can be determined.

[0091] As shown in Figures 1-2 , the light emitting diode 100 and the light receiving detection assembly 300 are parallel to the measured surface of the air conditioner evaporator and the distance is 10 mm.

[0092] In the technical solution, the distance between the light emitting diode 100 and the light receiving detection assembly 300 is 10 mm. This setting not only leaves a space for receiving reflected light, but also does not cause the received reflected light to be too weak due to too far distance.

[0093] As shown in Figures 3-17 , in this embodiment, when there is no dust on the surface of the air conditioner evaporator, the light flux received by the second photosensitive triode 320 is the largest, which is 1.850%. When the dust accumulation amount gradually increases, the light flux received by the surfaces of the first photosensitive triode 310 and the second photosensitive triode 320 gradually decreases to 0.062% and 0.226%, and the light that can be received by the surface of the third photosensitive triode 330 gradually increases to 0.026%. Thus, the different dust accumulation degrees on the surface of the air conditioner evaporator can be detected. In this embodiment, the specific relationship between the surface diffuse reflectivity and the light flux received by the surface of the photosensitive triode is as follows:

[0094] Optical efficiency First photosensitive triode Second photosensitive triode Third photosensitive triode Mirror surface 0.485％ 1.850％ 0.011％ 20% diffuse reflective surface 0.343％ 1.307％ 0.012％ 40% diffuse reflective surface 0.250％ 0.947％ 0.016％ 60% diffuse reflective surface 0.158％ 0.586％ 0.020％ 80% diffuse reflective surface 0.062％ 0.226％ 0.026％

[0095] According to the second aspect of the embodiment of the present application, a self-cleaning air conditioner is provided, which comprises: an air conditioner body; the air conditioner evaporator dust detection device of any one of the above, wherein the air conditioner evaporator surface dust accumulation detection device is arranged in the air conditioner; an air conditioner evaporator, wherein the air conditioner evaporator dust detection device is arranged in the air conditioner and the detection end thereof faces the measured surface of the air conditioner evaporator; and a cleaning assembly, wherein the cleaning assembly is electrically connected to the air conditioner evaporator dust detection device.

[0096] In the technical solution, the cleaning assembly of the self-cleaning air conditioner is electrically connected to the dust detection device, and the cleaning frequency of the self-cleaning air conditioner is controlled by the dust detection device. When the dust detection device detects that the dust on the surface of the air conditioner evaporator is excessive, the cleaning assembly is controlled to start and clean the inside of the air conditioner.

[0097] The setting can ensure that the dust is cleaned in time when the dust in the air conditioner is excessive, and can avoid waste caused by the starting of the cleaning assembly when cleaning is not needed.

[0098] According to a third aspect of the embodiment of the present application, a self-cleaning method of an air conditioner is provided, applied to the self-cleaning air conditioner, and comprising the following steps:

[0099] The interval time for starting the dust accumulation detection device of the evaporator of the air conditioner is set;

[0100] When the starting time is reached, the dust detection device of the evaporator of the air conditioner is started;

[0101] The dust accumulation detection device of the evaporator of the air conditioner detects the dust accumulation on the measured surface of the evaporator of the air conditioner;

[0102] If the dust accumulation does not reach the threshold value, the process is ended;

[0103] If the dust accumulation reaches the threshold value, the dust detection device of the evaporator of the air conditioner starts the cleaning assembly, and the cleaning assembly cleans the evaporator of the air conditioner;

[0104] After the cleaning assembly finishes cleaning, the dust detection device of the evaporator of the air conditioner detects the measured surface of the evaporator of the air conditioner again;

[0105] If the dust accumulation does not reach the threshold value, the process is ended;

[0106] If the dust accumulation reaches the threshold value, the process returns to the step of starting the cleaning assembly of the dust detection device of the evaporator of the air conditioner, and the cleaning assembly cleans the evaporator of the air conditioner.

[0107] In the technical solution, the re-detection step is added, the dust detection device detects the dust on the surface of the evaporator of the air conditioner again after the cleaning assembly finishes cleaning, and if the dust is still unqualified, the cleaning step is returned to, so that the situation that the cleaning of the air conditioner cleaning assembly is not in place the first time is avoided.

[0108] As described above, if the dust accumulation detected by the dust detection device still exceeds the threshold value after the recycling, it is considered that there is a fault in the cleaning assembly or the dust detection device, and the recycling is stopped, and the warning indicator issues a warning.

[0109] In the present application, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "a plurality of" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and other terms should be broadly understood, for example, "connecting" can be fixed connection, can also be detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0110] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0111] In the description of the present application, the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0112] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An air conditioner evaporator dust detection device, characterized by, It comprises: a light emitting diode for emitting light to the measured surface of the air conditioner evaporator; a shaping lens group arranged between the measured surface of the air conditioner evaporator and the light emitting diode; a light receiving detection component for detecting the distribution of the reflected light of the measured surface of the air conditioner evaporator; a warning device electrically connected to the light receiving detection component.

2. The air conditioner evaporator dust detection device of claim 1, wherein, It further comprises: a printed circuit board, and the light emitting diode and the light receiving detection component are integrally arranged on the printed circuit board.

3. The air conditioner evaporator dust detection apparatus of claim 1, wherein, It further comprises: a housing, and the light emitting diode, the shaping lens group and the light receiving detection component are arranged inside the housing, one side of the housing is parallel to the measured surface of the air conditioner evaporator, and the side of the housing parallel to the measured surface of the air conditioner evaporator is flat and transparent.

4. The air conditioner evaporator dust detection apparatus of claim 1, wherein, The shaping lens group comprises: a light emitting shaping lens for shaping the light beam emitted by the light emitting diode to the measured surface of the air conditioner evaporator; a light receiving shaping lens for shaping the reflected light of the measured surface of the air conditioner evaporator.

5. The air conditioner evaporator dust detection device of claim 4, wherein, The shaping lens group further comprises: an optical baffle arranged between the light emitting shaping lens and the light receiving shaping lens.

6. The air conditioner evaporator dust detection device according to claim 4, wherein: the light emitting shaping lens is a conical shaping lens; the light receiving shaping lens is an arched shaping lens.

7. The air conditioner evaporator dust detection apparatus according to claim 1, wherein The light receiving detection component comprises: a first photosensitive triode; a second photosensitive triode; a third photosensitive triode, and the first, second and third photosensitive triodes are arranged in a linear type and are arranged at different distances from the light emitting diode.

8. The air conditioner evaporator dust detection device according to claim 1, wherein: the light emitting diode and the light receiving detection component are parallel to the measured surface of the air conditioner evaporator and are 10 mm away from the measured surface. 9.A self-cleaning air conditioner, characterized by, It comprises: an air conditioner body; the air conditioner evaporator dust detection device according to any one of claims 1-8, the air conditioner evaporator surface dust accumulation detection device is arranged inside the air conditioner; an air conditioner evaporator, the air conditioner evaporator dust detection device is arranged inside the air conditioner, and the detection end thereof faces the measured surface of the air conditioner evaporator; a cleaning component electrically connected to the air conditioner evaporator dust detection device.

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