CN216926480U - Dust detection device - Google Patents
Dust detection device Download PDFInfo
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- CN216926480U CN216926480U CN202122879592.7U CN202122879592U CN216926480U CN 216926480 U CN216926480 U CN 216926480U CN 202122879592 U CN202122879592 U CN 202122879592U CN 216926480 U CN216926480 U CN 216926480U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model discloses a dust detection device, which comprises a detection circuit, wherein the detection circuit comprises a light-emitting module, a light-receiving module and an output module; the light-emitting module comprises a light emitter for emitting light, the light-receiving module comprises a light receiver, and the light receiver is used for receiving the light emitted by the light emitter and controlling the light-receiving module to output a first voltage signal corresponding to voltage according to the intensity of the received light; the output module is connected with the output end of the light receiving module to obtain a first voltage signal and output a voltage output signal corresponding to the voltage according to the fluctuation condition of the first voltage signal. The dust cleaning device can detect the dust concentration, and a user can control the dust cleaning time through the detected dust concentration.
Description
Technical Field
The utility model relates to the field of cleaning electric appliances, in particular to a dust detection device.
Background
The vacuum cleaner is a familiar household appliance, and the vacuum cleaner brings a clean and sanitary home environment to people and saves time and labor, so the vacuum cleaner is popular to people.
Existing vacuum cleaners have been equipped with various forms of suction appliances: wherein the floor brush is also a common suction tool. Some vacuum cleaners are also provided with a rotary brush near a suction port of the floor brush for better cleaning dust in the carpet, so that the surface of the carpet is vibrated to beat out the dust in the carpet, and the vacuum cleaner is convenient to suck and collect the dust in a dust bag.
The prior dust collector also has the following problems when cleaning carpet dust: a. it is not possible to know how much dust is in the carpet; b. how long it takes for the dust to be cleaned up cannot be grasped.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model provides a dust detection device which can detect the dust concentration, and a user can control the dust cleaning time through the detected dust concentration.
In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:
a dust detection device comprises a detection circuit, a detection circuit and a control circuit, wherein the detection circuit comprises a light-emitting module, a light-receiving module and an output module; the light-emitting module comprises a light emitter for emitting light, the light-receiving module comprises a light receiver for receiving the light emitted by the light emitter and controlling the light-receiving module to output a first voltage signal corresponding to voltage according to the intensity of the received light; the output module is connected with the output end of the light receiving module to obtain a first voltage signal and output a voltage output signal corresponding to the voltage according to the fluctuation condition of the first voltage signal.
With the above structure, the light emitter emits light to the light receiver, and when there is no dust between the light emitter and the light receiver, the light receiver receives stable light intensity, so that the light receiver controls the light receiving module to output a stable first voltage signal, and the output module outputs a voltage output signal of almost 0V because the first voltage signal has no fluctuation;
when dust exists between the light emitter and the light receiver, the dust can block the light emitted by the light emitter to the light receiver, and the more the dust is, namely the higher the dust concentration is, the more the light blocked by the dust is; at this time, the light intensity received by the light receiver is unstable, the more dust, the smaller the light intensity received by the light receiver is, so that the light receiver controls the light receiving module to output a fluctuating first voltage signal, and the smaller the light intensity received by the light receiver is, the larger the fluctuation of the first voltage signal output by the light receiving module is; the output module outputs a voltage output signal with voltage due to the fluctuation of the first voltage signal, and the voltage of the voltage output signal output by the output module is higher as the fluctuation of the first voltage signal is larger; or the first voltage signal has fluctuation, and the output module outputs a voltage output signal with the voltage greater than 0.
Further, the light emitting module comprises a light emitting control unit for controlling the light emitting intensity of the light emitter, and the light emitting control unit is connected with the output end of the light receiving module to obtain a first voltage signal and control the light emitting intensity of the light emitter according to the voltage of the first voltage signal;
the lower the voltage of the first voltage signal is, the lower the light-emitting intensity of the light emitter is controlled by the light-emitting control unit; the higher the voltage of the first voltage signal is, the higher the light-emitting intensity of the light emitter is controlled by the light-emitting control unit.
Because the dust is tiny, the intensity of the light which can be blocked is limited, so that the fluctuation of the first voltage signal is small; with the above structure, when dust increases between the light emitter and the light receiver, the light intensity received by the light receiver decreases, so that the first voltage signal output by the light receiving module under the control of the light emitting control unit decreases, and at this time, the light emitter decreases the light emitting intensity under the control of the light emitting control unit, so that the light intensity received by the light receiver further decreases, and the first voltage signal output by the light receiving module further decreases, so that the output module can more easily acquire the fluctuation condition of the first voltage signal and output an accurate voltage output signal;
when the dust between the light emitter and the light receiver is reduced, the light intensity received by the light receiver is increased, so that the first voltage signal output by the light receiving module is controlled to be increased, and the light emitter is controlled by the light emitting control unit to increase the light emitting intensity.
Further, the light emitting control unit comprises a first triode and an intermediate unit, the intermediate unit is connected with the light receiving module to output a corresponding current signal according to a first voltage signal, and a base of the first triode is connected with the intermediate unit to obtain the current signal output by the intermediate unit; and the collector and the emitter of the first triode are connected into a loop of the light emitter.
With the above structure, the light emission intensity of the light emitter is controlled by controlling the current flowing through the light emitter using the characteristics of the first transistor.
Furthermore, the middle unit comprises a first resistor, a second resistor and a first capacitor, one end of the first resistor is connected with the light receiving module, the other end of the first resistor is connected with one end of the second resistor, and the other end of the second resistor is grounded; the first capacitor is connected in parallel with the first resistor; and one end of the first resistor connected with the second resistor is connected with the base electrode of the first triode.
Furthermore, the light emitting module comprises a third resistor, one end of the light emitter is connected with Vcc, the other end of the light emitter is connected with the collector of the first triode, and the emitter of the first triode is grounded through the third resistor.
Specifically, the first triode is an NPN-type triode.
Further, the light receiving module includes a fourth resistor and an amplifying unit capable of amplifying a voltage; one end of the light receiver is connected with Vcc, the other end of the light receiver is connected with one end of the fourth resistor, the other end of the fourth resistor is grounded, and the light receiver controls the current flowing through the fourth resistor according to the intensity of the light received by the light receiver; the input end of the amplifying unit is connected with one end of the fourth resistor, which is connected with the light receiver, and the output end of the amplifying unit outputs a first voltage signal.
Further, the amplifying unit comprises a first operational amplifier, a fifth resistor, a sixth resistor and a second capacitor; one end of the fifth resistor is connected with one end of the fourth resistor, which is connected with the light receiver, and the other end of the fifth resistor is connected with the reverse input end of the first operational amplifier, the forward input end of the first operational amplifier is connected with a first power supply, the sixth resistor and the second capacitor are connected in parallel and then bridged on the reverse input end and the output end of the first operational amplifier, and the output end of the first operational amplifier outputs a first voltage signal.
Further, the output module comprises a second operational amplifier, a seventh resistor, an eighth resistor, a third capacitor and a fourth capacitor; one end of the seventh resistor is connected with the output end of the light receiving module, the other end of the seventh resistor is connected with one end of the third capacitor, the other end of the third capacitor is connected with the reverse input end of the second operational amplifier, the forward input end of the second operational amplifier is connected with the second power supply, the eighth resistor and the third capacitor are connected in parallel and then bridged on the reverse input end and the output end of the second operational amplifier, and the output end of the second operational amplifier outputs a voltage output signal.
Further, the light emitter is a light emitting diode, and the light receiver is a phototriode.
Specifically, the anode of the light emitting diode is connected with Vcc, and the cathode of the light emitting diode is connected with the collector of the first triode; the phototriode is a PNP type phototriode, an emitting electrode of the phototriode is connected with Vcc, and a collecting electrode of the phototriode is connected with the fourth resistor.
Further, the light emitter and the light receiver work in the light range of 940nm wavelength; it can be understood that: the wavelength of the light emitted by the light emitter is 940 nm; the light wavelength that the light receiver can accept is 940nm range.
By adopting the structure, the dust detection device can avoid the influence of ambient light, and the accuracy of the dust detection device on the detection of the dust concentration is effectively improved.
Further, the dust detection device comprises a dust suction component with a dust suction channel, and the light emitter and the light receiver are respectively arranged on two sides of the dust suction channel.
Specifically, one end of the dust collection component is connected with a pipeline of the dust collection fan; when the dust collection fan is started, dust can enter a dust collection box of the dust collection fan through a dust collection channel of the dust collection component and a pipeline of the dust collection fan; with the structure, when dust passes through the dust suction channel, the dust passes through the space between the light emitter and the light receiver and blocks the light emitted by the light emitter to the light receiver;
specifically, dust absorption part one end is provided with circular joint so that its pipe connection with dust absorption fan, and the other end is provided with the rectangle interface so that it is connected with the bottom plate brush.
Further, the light emitted by the light emitter to the light receiver is perpendicular to the dust suction channel.
By adopting the structure, the dust detection device can more accurately identify the dust concentration.
Further, the light emitter and the light receiver are arranged at the waist position of the dust suction channel.
Further, the dust detecting device includes a mounting seat for mounting the light emitter and the light receiver to the dust suction member.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the dust detection device of the utility model converts dust concentration signals into electronic signals by arranging the light emitter and the light receiver, thereby realizing the detection of the dust concentration.
(2) The light emitting module of the dust detection device is provided with the light emitting control unit, so that the fluctuation condition of the first voltage signal is increased, and the output module can acquire the fluctuation condition of the first voltage signal conveniently.
(3) The dust detection device is reasonable in structural design.
Drawings
FIG. 1 is a schematic view of a dust detecting device according to the present invention;
FIG. 2 is a schematic cross-sectional view of the dust detecting device of the present invention;
FIG. 3 is a schematic circuit diagram of a detection circuit in the dust detection apparatus according to the present invention;
reference numerals: 1, a light emitting module; 101 a light emitter; 102 a light emission control unit; 1021 a first triode; 1022 an intermediate unit; 2022a first resistor; 2022b a second resistor; 2022c a first capacitor; 103 a third resistor; 2a light receiving module; 201 a light receiver; 202 a fourth resistor; 203 an amplifying unit; 2031 a first operational amplifier; 2032 a fifth resistor; 2033 a sixth resistor; 2034 a second capacitor; 3, an output module; 301 a second operational amplifier; 302 a seventh resistor; 303 an eighth resistor; 304 a third capacitance; 305 a fourth capacitance; 4 dust-absorbing parts; 401 a dust suction channel; and 5, installing a base.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.
As shown in fig. 1 to 3, a dust detecting device includes a detection circuit including a light emitting module 1, a light receiving module 2, and an output module 3; the light emitting module 1 comprises a light emitter 101 for emitting light, the light receiving module 2 comprises a light receiver 201, and the light receiver 201 is used for receiving the light emitted by the light emitter 101 and controlling the light receiving module 2 to output a first voltage signal corresponding to voltage according to the intensity of the received light; the output module 3 is connected with the output end of the light receiving module 2 to obtain a first voltage signal and output a voltage output signal corresponding to the voltage according to the fluctuation condition of the first voltage signal.
With the above configuration, the light emitter 101 emits light to the light receiver 201, and when there is no dust between the light emitter 101 and the light receiver 201, the light receiver 201 receives stable light intensity, so that it controls the light receiving module 2 to output a stable first voltage signal, and the output module 3 outputs a voltage output signal of almost 0V since the first voltage signal has no fluctuation;
when dust exists between the light emitter 101 and the light receiver 201, the dust blocks the light emitted from the light emitter 101 to the light receiver 201, and the more the dust is, i.e. the higher the dust concentration is, the more the light is blocked by the dust; at this time, the light intensity received by the light receiver 201 is unstable, and the more dust, the smaller the light intensity received by the light receiver 201 is, so that the light receiver is controlled to output the fluctuating first voltage signal by the light receiving module 2, and the smaller the light intensity received by the light receiver 201 is, the larger the fluctuation magnitude of the first voltage signal output by the light receiving module 2 is; due to the fluctuation of the first voltage signal, the output module 3 outputs a voltage output signal with voltage, the voltage of the voltage output signal output by the output module 3 is higher when the first voltage signal fluctuates, or the voltage output signal with voltage greater than 0 is output by the output module when the first voltage signal fluctuates.
Preferably, the light emitting module 1 includes a light emitting control unit 102 for controlling the light emitting intensity of the light emitter 101, and the light emitting control unit 102 is connected to the output end of the light receiving module 2 to obtain a first voltage signal and control the light emitting intensity of the light emitter 101 according to the voltage magnitude of the first voltage signal;
the lower the voltage of the first voltage signal is, the lower the light emission control unit 102 controls the light emitter 101 to emit light with a lower intensity; the higher the voltage of the first voltage signal is, the higher the light emission control unit 102 controls the light emitter 101 to emit the higher light emission intensity.
Because the dust is tiny, the intensity of the light which can be blocked is limited, so that the fluctuation of the first voltage signal is small; with the above configuration, when dust increases between the light emitter 101 and the light receiver 201, the light intensity received by the light receiver 201 decreases, and therefore the first voltage signal output by the light receiving module 2 under the control of the light emission control unit 102 decreases, and at this time, the light emitter 101 is controlled by the light emission control unit 102 to decrease the light intensity received by the light receiver 201, and further decrease the first voltage signal output by the light receiving module 2, so that the output module 3 can more easily acquire the fluctuation of the first voltage signal and output an accurate voltage output signal;
when the dust between the light emitter 101 and the light receiver 201 decreases, the light intensity received by the light receiver 201 increases, so that the first voltage signal output by the light receiving module 2 controlled by the light receiver increases, and the light emitter 101 is controlled by the light emission control unit 102 to increase the light emission intensity.
Preferably, the light emitting control unit 102 includes a first transistor 1021 and an intermediate unit 1022, the intermediate unit 1022 is connected to the light receiving module 2 to output a corresponding current signal according to a first voltage signal, and a base of the first transistor 1021 is connected to the intermediate unit 1022 to obtain the current signal output by the intermediate unit 1022; the collector and emitter of the first triode 1021 are connected to the loop of the light emitter 101.
With the above structure, the light emitting intensity of the light emitter 101 is controlled by controlling the current flowing through the light emitter 101 using the characteristics of the first transistor 1021.
Preferably, the intermediate unit 1022 includes a first resistor 1022a, a second resistor 1022b, and a first capacitor 1022c, one end of the first resistor 1022a is connected to the light receiving module 2, the other end is connected to one end of the second resistor 1022b, and the other end of the second resistor 1022b is grounded; the first capacitor 1022c is connected in parallel to the first resistor 1022 a; one end of the first resistor 1022a connected to the second resistor 1022b is connected to the base of the first transistor 1021.
Preferably, the light emitting module 1 includes a third resistor 103, one end of the light emitter 101 is connected to Vcc, the other end of the light emitter is connected to a collector of the first triode 1021, and an emitter of the first triode 1021 is grounded through the third resistor 103.
Specifically, the first triode 1021 is an NPN-type triode.
Preferably, the light receiving module 2 includes a fourth resistor 202 and an amplifying unit 203 capable of amplifying a voltage; one end of the light receiver 201 is connected with Vcc, the other end of the light receiver is connected with one end of the fourth resistor 202, the other end of the fourth resistor 202 is grounded, and the light receiver 201 controls the current flowing through the fourth resistor 202 according to the intensity of the received light; the input end of the amplifying unit 203 is connected to one end of the fourth resistor 202 connected to the light receiver 201, and the output end of the amplifying unit 203 outputs a first voltage signal.
Preferably, the amplifying unit 203 includes a first operational amplifier 2031, a fifth resistor 2032, a sixth resistor 2033, and a second capacitor 2034; one end of the fifth resistor 2032 is connected to one end of the fourth resistor 202 connected to the light receiver 201, and the other end is connected to the inverting input terminal of the first operational amplifier 2031, the forward input terminal of the first operational amplifier 2031 is connected to a first power supply, the sixth resistor 2033 is connected in parallel to the second capacitor 2034 and then bridged over the inverting input terminal and the output terminal of the first operational amplifier 2031, and the output terminal of the first operational amplifier 2031 outputs a first voltage signal.
Preferably, the output module 3 includes a second operational amplifier 301, a seventh resistor 302, an eighth resistor 303, a third capacitor 304, and a fourth capacitor 305; one end of the seventh resistor 302 is connected to the output end of the light receiving module 2, the other end of the seventh resistor 302 is connected to one end of the third capacitor 304, the other end of the third capacitor 304 is connected to the inverting input end of the second operational amplifier 301, the forward input end of the second operational amplifier 301 is connected to a second power supply, the eighth resistor 303 is connected in parallel to the third capacitor 304 and then bridged over the inverting input end and the output end of the second operational amplifier 301, and the output end of the second operational amplifier 301 outputs a voltage output signal.
Preferably, the light emitter 101 is a light emitting diode, and the light receiver 201 is a phototransistor.
Specifically, the anode of the light emitting diode is connected to Vcc, and the cathode of the light emitting diode is connected to the collector of the first triode 1021; the phototriode is a PNP type phototriode, an emitting electrode of the phototriode is connected with Vcc, and a collecting electrode of the phototriode is connected with the fourth resistor 202.
Preferably, the light emitter 101 and the light receiver 201 operate in a light range with a wavelength of 940 nm; it can be understood that: the wavelength of the light emitted by the light emitter 101 is within the range of 940 nm; the light receiver 201 can receive light with a wavelength of 940 nm.
By adopting the structure, the dust detection device can avoid the influence of ambient light, and the accuracy of the dust detection device for detecting the dust concentration is effectively improved.
Preferably, the dust detection device includes a dust suction member 4 having a dust suction passage 401, and the light emitter 101 and the light receiver 201 are respectively provided on both sides of the dust suction passage 401.
Specifically, one end of the dust collection part 4 is connected with a pipeline of a dust collection fan; when the dust-absorbing blower is started, dust can enter a dust-collecting box of the dust-absorbing blower through a dust-absorbing channel 401 of the dust-absorbing part 4 and a pipeline of the dust-absorbing blower; with the above structure, when dust passes through the dust suction channel 401, the dust passes through the space between the light emitter 101 and the light receiver 201 and blocks the light emitted from the light emitter 101 to the light receiver 201;
specifically, one end of the dust collection part 4 is provided with a circular joint so as to be connected with a pipeline of a dust collection fan, and the other end of the dust collection part is provided with a rectangular connector so as to be connected with a bottom plate brush.
Preferably, the light emitted from the light emitter 101 to the light receiver 201 is perpendicular to the dust suction channel 401.
By adopting the structure, the dust detection device can more accurately identify the dust concentration.
Preferably, the light emitter 101 and the light receiver 201 are disposed at a waist position of the dust suction passage 401.
Preferably, the dust detection device includes a mounting base 5 for mounting the light emitter 101 and the light receiver 201 to the dust suction member 4.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A dust detection device characterized by: the detection circuit comprises a light emitting module (1), a light receiving module (2) and an output module (3); the light emitting module (1) comprises a light emitter (101) for emitting light, the light receiving module (2) comprises a light receiver (201), and the light receiver (201) is used for receiving the light emitted by the light emitter (101) and controlling the light receiving module (2) to output a first voltage signal corresponding to voltage according to the intensity of the received light; the output module (3) is connected with the output end of the light receiving module (2) to obtain a first voltage signal and output a voltage output signal corresponding to the voltage according to the fluctuation condition of the first voltage signal;
the light emitting module (1) comprises a light emitting control unit (102) used for controlling the light emitting intensity of the light emitter (101), and the light emitting control unit (102) is connected with the output end of the light receiving module (2) to obtain a first voltage signal and control the light emitting intensity of the light emitter (101) according to the voltage of the first voltage signal.
2. The dust detection device according to claim 1, characterized in that: the light-emitting control unit (102) comprises a first triode (1021) and an intermediate unit (1022), the intermediate unit (1022) is connected with the light-receiving module (2) to output a corresponding current signal according to a first voltage signal, and a base of the first triode (1021) is connected with the intermediate unit (1022) to obtain the current signal output by the intermediate unit (1022); the collector and the emitter of the first triode (1021) are connected into a loop of the light emitter (101).
3. The dust detection device according to claim 2, characterized in that: the intermediate unit (1022) comprises a first resistor (1022a), a second resistor (1022b), and a first capacitor (1022c), wherein one end of the first resistor (1022a) is connected with the light receiving module (2), the other end of the first resistor is connected with one end of the second resistor (1022b), and the other end of the second resistor (1022b) is grounded; the first capacitor (1022c) is connected in parallel to the first resistor (1022 a); one end of the first resistor (1022a) connected with the second resistor (1022b) is connected with the base of the first triode (1021);
the light emitting module (1) comprises a third resistor (103), one end of the light emitter (101) is connected with Vcc, the other end of the light emitter is connected with a collector of the first triode (1021), and an emitter of the first triode (1021) is grounded through the third resistor (103).
4. The dust detection device according to claim 1, characterized in that: the light receiving module (2) comprises a fourth resistor (202) and an amplifying unit (203) capable of amplifying voltage; one end of the light receiver (201) is connected with Vcc, the other end of the light receiver is connected with one end of the fourth resistor (202), the other end of the fourth resistor (202) is grounded, and the light receiver (201) controls the current flowing through the fourth resistor (202) according to the intensity of light received by the light receiver; the input end of the amplifying unit (203) is connected with one end of the fourth resistor (202) connected with the light receiver (201), and the output end of the amplifying unit (203) outputs a first voltage signal.
5. The dust detection device according to claim 4, characterized in that: the amplification unit (203) comprises a first operational amplifier (2031), a fifth resistor (2032), a sixth resistor (2033), and a second capacitor (2034); one end of the fifth resistor (2032) is connected with one end of the fourth resistor (202) connected with the light receiver (201), the other end of the fifth resistor is connected with the reverse input end of the first operational amplifier (2031), the forward input end of the first operational amplifier (2031) is connected with a first power supply, the sixth resistor (2033) is connected with the second capacitor (2034) in parallel and then is bridged on the reverse input end and the output end of the first operational amplifier (2031), and the output end of the first operational amplifier (2031) outputs a first voltage signal.
6. The dust detection device according to claim 1, characterized in that: the output module (3) comprises a second operational amplifier (301), a seventh resistor (302), an eighth resistor (303), a third capacitor (304) and a fourth capacitor (305); one end of the seventh resistor (302) is connected with the output end of the light receiving module (2), the other end of the seventh resistor is connected with one end of the third capacitor (304), the other end of the third capacitor (304) is connected with the reverse input end of the second operational amplifier (301), the forward input end of the second operational amplifier (301) is connected with a second power supply, the eighth resistor (303) and the third capacitor (304) are connected in parallel and then are connected across the reverse input end and the output end of the second operational amplifier (301), and the output end of the second operational amplifier (301) outputs a voltage output signal.
7. The dust detection device according to claim 1, characterized in that: the light emitter (101) is a light emitting diode, and the light receiver (201) is a phototriode; the light emitter (101) and the light receiver (201) work in the light range of 940nm wavelength.
8. The dust detection device according to claim 1, characterized in that: the dust collection device comprises a dust collection part (4) with a dust collection channel (401), wherein the light emitter (101) and the light receiver (201) are respectively arranged on two sides of the dust collection channel (401).
9. The dust detection device according to claim 8, characterized in that: the light emitted by the light emitter (101) to the light receiver (201) is perpendicular to the dust suction channel (401).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122879592.7U CN216926480U (en) | 2021-11-23 | 2021-11-23 | Dust detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122879592.7U CN216926480U (en) | 2021-11-23 | 2021-11-23 | Dust detection device |
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| Publication Number | Publication Date |
|---|---|
| CN216926480U true CN216926480U (en) | 2022-07-08 |
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| CN202122879592.7U Active CN216926480U (en) | 2021-11-23 | 2021-11-23 | Dust detection device |
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| CN (1) | CN216926480U (en) |
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- 2021-11-23 CN CN202122879592.7U patent/CN216926480U/en active Active
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