CN207882120U - Filter screen dirtying blockage detection device and household electrical appliance - Google Patents
Filter screen dirtying blockage detection device and household electrical appliance Download PDFInfo
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- CN207882120U CN207882120U CN201820173351.6U CN201820173351U CN207882120U CN 207882120 U CN207882120 U CN 207882120U CN 201820173351 U CN201820173351 U CN 201820173351U CN 207882120 U CN207882120 U CN 207882120U
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Abstract
The utility model discloses a kind of filter screen dirtying blockage detection device and household electrical appliance, which includes transmitting and receiving module, detection module and the power supply module connected by connector；Detection module includes light emitting devices and light-sensitive element；Transmitting and receiving module includes bleeder circuit, microcontroller and conversion circuit；The current signal that light-sensitive element exports is converted to voltage signal by conversion circuit；Microcontroller is compared the voltage signal of conversion circuit output and preset voltage threshold after each replacement or cleaning filter screen, and corresponding control signal is exported according to comparison result and controls the branch pressure voltage of bleeder circuit to bleeder circuit, and then adjust the light radiation intensity of light emitting devices；Power supply module is connect with the power end of light emitting devices and light-sensitive element, and light emitting devices is also connect through bleeder circuit with microcontroller, and the also converted circuit of light-sensitive element is connect with microcontroller.The utility model greatly improves the detection accuracy of filter screen dirtying blockage detection device.
Description
Technical field
The utility model is related to home wiring control field more particularly to a kind of filter screen dirtying blockage detection devices and household electrical appliance.
Background technology
The filter screen of unclean air conditioner (or air filter) can cause the outlet air of air conditioner to carry dust taste for a long time,
And wherein have a large amount of dust mites, cause damages to the health of user, and filter screen dirtying it is stifled after will increase the energy consumption of air conditioner,
Filter screen also results in air conditioner cooling or heating effect when serious dirty stifled is deteriorated, and can not even operate normally, therefore air conditioner
On be typically provided with filter screen dirtying blockage detection device.Filter screen dirtying blockage detection device on air conditioner include light emitting devices (such as
Infrared light-emitting diode) and light-sensitive element (such as infrared photodiode or infrared electro triode), light emitting devices is according to solid
Fixed initialization current work, after filter screen has dust accumulation, since dust accumulation has barrier effect to light, on filter screen
The photoinduction of the increase of dust accumulation, light-sensitive element is more and more weaker, when the photoinduction value of light-sensitive element drops to the voltage of some setting
When threshold value, filter screen dirtying blockage detection device prompts user's cleaning by corresponding suggestion device or replaces filter screen.
However, due in air conditioner on filter screen dirtying blockage detection device light emitting devices and light-sensitive element be exposed to for a long time
In air so that dust accumulation is had on light emitting devices and light-sensitive element, and after cleaning every time or replacing filter screen, light emitting devices
All it is the initialization current work with same size, and after light emitting devices and light-sensitive element dust accumulation, the light of light-sensitive element
Influence value can be lower and lower, therefore, with the increase of dust accumulation on light emitting devices and light-sensitive element, cleans or replaced every time
After strainer, the initial light influence value of light-sensitive element also can be lower and lower, to cause the detection of filter screen dirtying blockage detection device to miss
Difference is increasing；Also, since there are discretenesses for light emitting devices and light-sensitive element, i.e., light emitting devices is with identical work electricity
When flowing work, the photoinduction value of light radiation intensity and light-sensitive element all can difference, i.e., in the prior art on air conditioner
There are the not high defects of detection accuracy for filter screen dirtying blockage detection device.
Utility model content
The main purpose of the utility model is to provide a kind of filter screen dirtying blockage detection devices, it is intended to it is stifled to improve filter screen dirtying
The detection accuracy of detection device.
To achieve the goals above, the utility model provides a kind of filter screen dirtying blockage detection device, and the filter screen dirtying is stifled
Detection device includes transmitting and receiving module, detection module and the power supply module connected by connector；The detection module includes
Light emitting devices and light-sensitive element；The transmitting and receiving module includes bleeder circuit, microcontroller and conversion circuit；Wherein：
The conversion circuit, the current signal for exporting the light-sensitive element are converted to voltage signal；
The microcontroller, for believing the voltage of conversion circuit output after each replacement or cleaning filter screen
Number and preset voltage threshold be compared, and corresponding control signal is exported to the bleeder circuit to control according to comparison result
The branch pressure voltage of the bleeder circuit is made, and then adjusts the light radiation intensity of the light emitting devices；
The power supply module is connect with the power end of the light emitting devices and the light-sensitive element respectively, the light emitting
Device is also connect through the bleeder circuit with the I/O port of the microcontroller, the light-sensitive element also through the conversion circuit with it is described
The simulation input port of microcontroller connects.
Preferably, the filter screen dirtying blockage detection device further include voltage signal for being exported to the conversion circuit into
The input terminal of the current limliting decoupling circuit of row current limliting and decoupling, the current limliting decoupling circuit is connect with the conversion circuit, the limit
Between the output end and the simulation input port of the microcontroller that flow decoupling circuit.
Preferably, the bleeder circuit includes multiple divider resistances being sequentially connected in series, and each divider resistance is sequentially connected in series
One end afterwards is connect with the light emitting devices, and the other end after each divider resistance is sequentially connected in series is grounded, each partial pressure
Link node in resistance between any two divider resistances further averages other I/O port connection corresponding to the microcontroller.
Preferably, the conversion circuit includes first resistor, the first end of the first resistor respectively with the photosensitive member
The input terminal of the signal output end of part and the current limliting decoupling circuit connects, the second end ground connection of the first resistor.
Preferably, the current limliting decoupling circuit includes second resistance and the first capacitance；The first end of the second resistance is
The input terminal of the current limliting decoupling circuit, the first end of the second resistance is connect with the first end of the first resistor, described
The second end of second resistance is the output end of the current limliting decoupling circuit, and the second end of the second resistance is respectively with described first
The simulation input port of the first end of capacitance and the microcontroller connects, the second end ground connection of first capacitance.
Preferably, the light emitting devices be infrared light-emitting diode, the light-sensitive element be infrared photodiode or
Infrared electro triode.
Preferably, the bleeder circuit, the conversion circuit, the current limliting decoupling circuit and the power supply module are integrated
In on same pcb board.
Preferably, the regulated power supply that the power supply of the power supply module output is 5V.
In addition, to achieve the above object, the utility model also provides a kind of household electrical appliance, the household electrical appliance include as above
The filter screen dirtying blockage detection device.
Preferably, the household electrical appliance include air conditioner and air filter.
The utility model provides a kind of filter screen dirtying blockage detection device, which includes by patching
Transmitting and receiving module, detection module and the power supply module of part connection；The detection module includes light emitting devices and light-sensitive element；
The transmitting and receiving module includes bleeder circuit, microcontroller and conversion circuit；The conversion circuit is used for the light-sensitive element
The current signal of output is converted to voltage signal；The microcontroller is used for after each replacement or cleaning filter screen to described turn
The voltage signal and preset voltage threshold for changing circuit output are compared, and export corresponding control according to comparison result
Signal controls the branch pressure voltage of the bleeder circuit to the bleeder circuit, and then adjusts the light radiation of the light emitting devices
Intensity；The power supply module is connect with the power end of the light emitting devices and the light-sensitive element respectively, the light emitting dress
It sets and is also connect with the I/O port of the microcontroller through the bleeder circuit, the light-sensitive element is also through the conversion circuit and the list
The simulation input port of piece machine connects.The utility model due to the microcontroller it is each replace or cleaning filter screen after to described
The voltage signal and preset voltage threshold of conversion circuit output are compared, and export corresponding control letter according to comparison result
Number to the bleeder circuit to control the branch pressure voltage of the bleeder circuit, and then the light radiation for adjusting the light emitting devices is strong
Degree so that the initial light influence value of the light-sensitive element can be controlled by the microcontroller, i.e., the described light-sensitive element it is initial
Photoinduction value can not change due to the dust accumulation phenomenon or discreteness of the light emitting devices and the light-sensitive element, so that
The filter screen is from during initial clean state changes to dirty stifled state, the variable quantity of the photoinduction value of the light-sensitive element
In relatively steady state, to improve the detection accuracy of filter screen dirtying blockage detection device；Also, the utility model is also
Has the advantages that simple in structure and easy realization.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of the utility model filter screen dirtying blockage detection device first embodiment；
Fig. 2 is the structural schematic diagram of the utility model filter screen dirtying blockage detection device second embodiment.
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific implementation mode
It should be appreciated that specific embodiment described herein is only used to explain the utility model, it is not used to limit this
Utility model.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that if the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, without
It can be interpreted as indicating or implying its relative importance or implicitly indicate the quantity of indicated technical characteristic.It defines as a result,
The feature of " first ", " second " can explicitly or implicitly include at least one of the features.In addition, between each embodiment
Technical solution can be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, work as technical solution
Combination there is conflicting or cannot achieve when and will be understood that the combination of this technical solution is not present, it is also not new in this practicality
Within the protection domain that type requires.
The utility model provides a kind of filter screen dirtying blockage detection device, referring to Fig.1, the stifled detection dress of the present embodiment filter screen dirtying
Set transmitting and receiving module 102, detection module 203 and power supply module 104 including being connected by connector 101.
Wherein, the detection module 103 includes light emitting devices 1031 and light-sensitive element 1032, the transmitting and receiving module
102 include microcontroller 1021, bleeder circuit 1022 and conversion circuit 1023.
Specifically, the power supply module 104, for being provided for the light emitting devices 1031 and the light-sensitive element 1032
Power supply；
The light emitting devices 1031, for emitting light to filter screen 200, the light emitting devices 1031 was set to
The side of strainer 200；
The light-sensitive element 1032, for receiving the transmitted light through filter screen 200, the light-sensitive element 1032 is set to
The other side of light emitting devices 1031 described in 200 face of the filter screen；
The conversion circuit 1023, the current signal for exporting the light-sensitive element 1032 are converted to voltage signal；
The microcontroller 1021, for being exported to the conversion circuit 1023 after each replacement or cleaning filter screen 200
The voltage signal and preset voltage threshold be compared, and corresponding control signal is exported to described according to comparison result
Bleeder circuit 1022 adjusts the light spoke of the light emitting devices 1031 to control the branch pressure voltage of the bleeder circuit 1022
Penetrate intensity；
Further, the present embodiment filter screen dirtying blockage detection device further includes for being exported to the conversion circuit 1023
Voltage signal carries out the current limliting decoupling circuit 1024 of current limliting and decoupling.
In the present embodiment, the power supply module 104 respectively with the light emitting devices 1031 and the light-sensitive element 1032
Power end connection, the also I/O port through the bleeder circuit 1022 and the microcontroller 1021 of the light emitting devices 1031 connects
It connects, the light-sensitive element 1032 is also connect through the conversion circuit 1023 with the input terminal of the current limliting decoupling circuit 1024, institute
The output end for stating current limliting decoupling circuit 1024 is connect with the simulation input port ADD of the microcontroller 1021.
In the present embodiment, the light emitting devices 1031 is infrared light-emitting diode IR, and the light-sensitive element 1032 is red
Outer photodiode PT.It is understood that in other embodiments, the light emitting devices 1031 is two pole of infraluminescence
Pipe, the light-sensitive element 1032 or infrared electro triode.
Specifically, in the present embodiment, the bleeder circuit 1022 includes multiple divider resistance R1_0 being sequentially connected in series, divides
Piezoresistance R1_1 and divider resistance R1_n, each divider resistance (i.e. divider resistance R1_0, divider resistance R1_1 and point
Piezoresistance R1_n) be sequentially connected in series after one end connect with the light emitting devices 1031, each divider resistance (i.e. divider resistance
R1_0, divider resistance R1_1 and divider resistance R1_n) be sequentially connected in series after the other end ground connection (in the present embodiment, the partial pressure
Resistance R1_0 is connect with the light emitting devices 1031, the divider resistance R1_n ground connection), and appoint in each divider resistance
Link node between two divider resistances further averages other I/O port connection corresponding to the microcontroller 1021.Specifically, described
Link node between divider resistance R1_0 and divider resistance R1_1 is connect with the IO_0 of the microcontroller 1021 mouths, the partial pressure
Link node between resistance R1_1 and divider resistance R1_2 (not shown) is connect with the IO_1 of the microcontroller 1021 mouths, with this
Analogize, the link node between divider resistance R1_n-1 (not shown) and the divider resistance R1_n and the microcontroller 1021
IO_n-1 mouths connection.
It is understood that in the present embodiment, the number of the above-mentioned divider resistance being sequentially connected in series and each partial pressure electricity
The resistance value of resistance can be set according to actual conditions.
In the present embodiment, the conversion circuit 1023 includes that the first end of first resistor R1, the first resistor R1 are distinguished
With the input of the signal output end and the current limliting decoupling circuit 1024 of 1032 mid-infrared light electric diode PT of the light-sensitive element
End connection, the second end ground connection of the first resistor R1.
In the present embodiment, the current limliting decoupling circuit 1024 includes second resistance R2 and the first capacitance C1.Specifically, described
The first end of second resistance R2 be the current limliting decoupling circuit 1024 input terminal, the first end of the second resistance R2 with it is described
The first end of the first resistor R1 in conversion circuit 1023 connects, and the second end of the second resistance R2 is that the current limliting is gone
The output end of coupling circuit 1024, the second end of the second resistance R2 respectively with the first end of the first capacitance C1 and the list
The simulation input port ADD connections of piece machine 1021, the second end ground connection of the first capacitance C1.
In the present embodiment, the power supply module 104 includes the power supply and filter capacitor C2, the filter capacitor C2 of 5V
The power supply of the 5V is filtered so that the power supply that the power supply module 104 in the present embodiment exports is the steady of 5V
Press filter power supply.
In the present embodiment, the first end of the filter capacitor C2 in the power supply module 104 and the power supply electricity of the 5V
Source connects, the second end of filter capacitor C2 ground connection, the power supply of the 5V also respectively with the infrared light-emitting diode
The anode (i.e. the power end of the light emitting devices 1031) of IR and the first end of the infrared photodiode PT are (i.e. described
The power end of light-sensitive element 1032) connection, the cathode of the infrared light-emitting diode IR is through the connector 101 and the partial pressure
Divider resistance R1_0 connections described in circuit 1022, second end (namely the infrared electro of the infrared photodiode PT
The signal output end of diode PT) through the connector 101 and first of first resistor R1 described in the conversion circuit 1023
End connection.
In the present embodiment, the microcontroller 1021, the bleeder circuit 1022, the conversion circuit 1023, the current limliting
Decoupling circuit 1024 and the power supply module 104 are integrated on same pcb board, the PCB plates by the connector 101 with
The light emitting devices 1031 and the light-sensitive element 1032 in the detection module 103 are electrically connected, i.e., the present embodiment filters
External device in net filth blockage detection device only includes the light emitting devices 1031 and the light-sensitive element 1032, remaining electricity
Road (including microcontroller 1021, bleeder circuit 1022, conversion circuit 1023, current limliting decoupling circuit 1024 and the power supply module
104) it is integrated on same pcb board, while the present embodiment only needs two transmittings and reception that signal can be realized with connecting line, then
Add a connecting line being connect with the power supply module 104 that the present embodiment filter screen dirtying blockage detection device can be realized to the mistake
The dirty stifled detection scheme of strainer 200, the connecting line of the present embodiment is seldom, occupies little space, easy to implement, while also reducing into
This.
The operation principle of the present embodiment filter screen dirtying blockage detection device is described in detail below：The stifled inspection of the present embodiment filter screen dirtying
Device is surveyed, after replacing every time or cleaning filter screen 200, the microcontroller 1021 believes the voltage that the conversion circuit 1023 exports
Number and preset voltage threshold Vmax be compared, when the conversion circuit 1023 export voltage signal be less than preset voltage
When threshold value Vmax, the low and high level that the corresponding I/O port the output phase of the microcontroller 1021 is answered controls signal to the bleeder circuit
1022, to control the branch pressure voltage of the back-pressure circuit 1022, to control the operating voltage of the infrared light-emitting diode IR,
And then realize the purpose for the light radiation intensity for adjusting the infrared light-emitting diode IR, so that initial on the first resistor R1
Voltage value Vd is equal to preset voltage threshold Vmax (even if Vd=Vmax).
Specifically, when other I/O ports of the IO_0 mouths of the microcontroller 1021 output low level and the microcontroller 1021 are defeated
When going out high level, the operating voltage V_IR of the infrared light-emitting diode IR in the light emitting devices 1031 is the confession
The voltage that electric module 104 exports subtracts the partial pressure on the divider resistance R1_0；When the IO_1 mouths of the microcontroller 1021 export
It is described infrared in the light emitting devices 1031 when other I/O ports of low level and the microcontroller 1021 export high level
The operating voltage V_IR of light emitting diode IR subtracts the divider resistance R1_0 and institute for the voltage that the power supply module 104 exports
State the partial pressure after divider resistance R1_1 series connection；Similarly, when the IO_n-1 mouths of the microcontroller 1021 export low level and the list
When other I/O ports output high level of piece machine 1021, the work of the infrared light-emitting diode IR in the light emitting devices 1031
Make voltage V_IR be the power supply module 104 export voltage subtract the divider resistance R1_0, the divider resistance R1_1 and
Partial pressure after the divider resistance R1_n series connection, i.e. the present embodiment are answered by the corresponding I/O port the output phase of the microcontroller 1021
Low and high level controls signal to the bleeder circuit 1022, to control the branch pressure voltage of the bleeder circuit 1022, you can realizes
The purpose of the operating voltage V_IR of the infrared light-emitting diode IR is controlled, and then realizes and controls the infrared light-emitting diode IR
Light radiation intensity purpose.
The present embodiment filter screen dirtying blockage detection device after cleaning or replacing the filter screen 200 every time, detection with it is described
Voltage Vd on first resistor R1 described in the concatenated conversion circuits 1023 of infrared photodiode PT, the microcontroller
Voltage Vd (namely voltage signal of the output of the conversion circuit 1023) on 1021 couples of first resistor R1 and preset electricity
Pressure threshold value Vmax is compared, and is exported corresponding low and high level according to comparison result and controlled signal to the bleeder circuit
1022, to adjust the bleeder circuit of the bleeder circuit 1022, to adjust the operating voltage of the infrared light-emitting diode IR,
And then realize the purpose for the light radiation intensity for adjusting the infrared light-emitting diode IR, so that first on the first resistor R1
Beginning voltage value Vd is equal to preset voltage threshold Vmax (even if Vd=Vmax), in the present embodiment, on the first resistor R1
Initial voltage value Vd as cleans or replaces every time the initial voltage value on the first resistor R1 after the filter screen 200, i.e.,
The present embodiment filter screen dirtying blockage detection device after cleaning or replacing the filter screen 200 every time, first described in the present embodiment
Initial voltage value Vd on resistance R1 is equal to preset voltage threshold Vmax, when the microcontroller 1021 in the present embodiment
When detecting that the voltage value Vd on the first resistor R1 is less than or equal to the voltage threshold Vmin of setting, by prompting accordingly
The filter screen 200 is replaced in the prompt user cleaning of device (not shown).
The present embodiment filter screen dirtying blockage detection device is due to after cleaning or replacing the filter screen 200 every time, the list
Piece machine 1021 controls the initial voltage value Vd on the first resistor R1 equal to preset voltage threshold Vmax (even if Vd=
Vmax), i.e., the present embodiment filter screen dirtying blockage detection device after cleaning or replacing the filter screen 200 every time, the infrared light
The initial light influence value constant (being controlled by the microcontroller 1021) of electric diode PT namely the stifled inspection of the present embodiment filter screen dirtying
The initial light influence value for surveying infrared photodiode PT described in device will not be because of the infrared light-emitting diode IR and described
The dust accumulation phenomenon or discreteness of infrared photodiode PT and change so that in the present embodiment filter screen dirtying blockage detection device
The filter screen 200 from during initial clean state changes to dirty stifled state, the light of the infrared photodiode PT
The variable quantity of influence value is in relatively steady state, to which the detection for improving the present embodiment filter screen dirtying blockage detection device is accurate
True property；Also, the present embodiment also has the advantages that simple in structure and easy realization.
It should be noted that the work of the infrared light-emitting diode IR in the present embodiment filter screen dirtying blockage detection device
Work is directly driven by the I/O port of the microcontroller 1021, and in other embodiments, the infrared light-emitting diode IR also may be used
With an external driving circuit, such as transistor drive circuit drives the infrared light-emitting diode by transistor drive circuit
The work of IR, the utility model are not limited to this.
Fig. 2 is the structural schematic diagram of the utility model filter screen dirtying blockage detection device second embodiment, the novel filter net
Filth blockage detection device includes transmitting and receiving module 202, detection module 203 and the power supply module 204 connected by connector 201,
Wherein, the detection module 203 includes light emitting devices 2031 and light-sensitive element 2032, and the transmitting and receiving module 202 includes
Microcontroller 2021, bleeder circuit 2022, conversion circuit 2023 and current limliting decoupling circuit 2024.Together referring to Figures 1 and 2, this reality
That applies a filter screen dirtying blockage detection device and above-mentioned first embodiment differs only in the light emitting devices 2031 and the light
Quick element 2032 is set to the same side of filter screen 300, and the light-sensitive element 2032 is unrestrained anti-by filter screen 300 for receiving
The reflected light penetrated.It is the light emitting devices 2031, the light-sensitive element 2032, the microcontroller 2021, described in the present embodiment
Company between bleeder circuit 2022, the conversion circuit 2023, the current limliting decoupling circuit 2024 and the power supply module 204
Connect circuit structure, the work of relationship, the bleeder circuit 2022, the conversion circuit 2023 and the current limliting decoupling circuit 2024
It is identical as above-mentioned first embodiment to make principle and advantageous effect, details are not described herein again.
The utility model also provides a kind of household electrical appliance, such as air conditioner and air filter, which included
The structure of strainer filth blockage detection device, the filter screen dirtying blockage detection device can refer to above-described embodiment, and details are not described herein.Reason institute
Should, since the household electrical appliance of the present embodiment use the technical solution of above-mentioned filter screen dirtying blockage detection device, the family
The advantageous effect that electrical appliance has above-mentioned filter screen dirtying blockage detection device all.
It these are only the preferred embodiment of the utility model, it does not limit the scope of the patent of the present invention, every
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in
Other related technical areas are equally included in the patent within the scope of the utility model.
Claims (10)
1. a kind of filter screen dirtying blockage detection device, which is characterized in that the filter screen dirtying blockage detection device includes passing through connector
Transmitting and receiving module, detection module and the power supply module of connection；The detection module includes light emitting devices and light-sensitive element；Institute
It includes bleeder circuit, microcontroller and conversion circuit to state transmitting and receiving module；Wherein：
The conversion circuit, the current signal for exporting the light-sensitive element are converted to voltage signal；
The microcontroller, for it is each replace or cleaning filter screen after to the voltage signal of conversion circuit output and
Preset voltage threshold is compared, and exports corresponding control signal to the bleeder circuit according to comparison result to control
The branch pressure voltage of bleeder circuit is stated, and then adjusts the light radiation intensity of the light emitting devices；
The power supply module is connect with the power end of the light emitting devices and the light-sensitive element respectively, the light emitting devices
It is also connect with the I/O port of the microcontroller through the bleeder circuit, the light-sensitive element is also through the conversion circuit and the monolithic
The simulation input port of machine connects.
2. filter screen dirtying blockage detection device as described in claim 1, which is characterized in that the filter screen dirtying blockage detection device is also
Include the current limliting decoupling circuit of voltage signal the progress current limliting and decoupling for being exported to the conversion circuit, the current limliting decoupling
The input terminal of circuit is connect with the conversion circuit, the simulation input of the output end and the microcontroller of the current limliting decoupling circuit
Between port.
3. filter screen dirtying blockage detection device as claimed in claim 2, which is characterized in that the bleeder circuit include it is multiple successively
Concatenated divider resistance, one end after each divider resistance is sequentially connected in series are connect with the light emitting devices, each partial pressure
The other end after resistance is sequentially connected in series is grounded, and the link node in each divider resistance between any two divider resistances further averages
I/O port connection not corresponding to the microcontroller.
4. filter screen dirtying blockage detection device as claimed in claim 3, which is characterized in that the conversion circuit includes the first electricity
Resistance, the first end input with the signal output end of the light-sensitive element and the current limliting decoupling circuit respectively of the first resistor
End connection, the second end ground connection of the first resistor.
5. filter screen dirtying blockage detection device as claimed in claim 4, which is characterized in that the current limliting decoupling circuit includes second
Resistance and the first capacitance；The first end of the second resistance is the input terminal of the current limliting decoupling circuit, the second resistance
First end is connect with the first end of the first resistor, and the second end of the second resistance is the output of the current limliting decoupling circuit
The second end at end, the second resistance connects with the simulation input port of the first end of first capacitance and the microcontroller respectively
It connects, the second end ground connection of first capacitance.
6. filter screen dirtying blockage detection device as claimed in claim 5, which is characterized in that the light emitting devices is infraluminescence
Diode, the light-sensitive element are infrared photodiode or infrared electro triode.
7. the filter screen dirtying blockage detection device as described in any one of claim 2 to 6, which is characterized in that the bleeder circuit,
The conversion circuit, the current limliting decoupling circuit and the power supply module are integrated on same pcb board.
8. the filter screen dirtying blockage detection device as described in any one of claim 2 to 6, which is characterized in that the power supply module
The power supply of output is the regulated power supply of 5V.
9. a kind of household electrical appliance, which is characterized in that the household electrical appliance include filtering described in any item of the claim 1 to 8
Net filth blockage detection device.
10. household electrical appliance as claimed in claim 9, which is characterized in that the household electrical appliance include air conditioner and air filtration
Device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820173351.6U CN207882120U (en) | 2018-01-30 | 2018-01-30 | Filter screen dirtying blockage detection device and household electrical appliance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820173351.6U CN207882120U (en) | 2018-01-30 | 2018-01-30 | Filter screen dirtying blockage detection device and household electrical appliance |
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| CN207882120U true CN207882120U (en) | 2018-09-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109512355A (en) * | 2019-01-02 | 2019-03-26 | 珠海格力电器股份有限公司 | Dish-washing machine |
| CN112807826A (en) * | 2021-04-15 | 2021-05-18 | 李红 | Intelligent filtering device for intelligent water supply pipeline |
| CN113984717A (en) * | 2021-09-22 | 2022-01-28 | 深圳拓邦股份有限公司 | Object surface dirt degree detection device and cleaning equipment |
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2018
- 2018-01-30 CN CN201820173351.6U patent/CN207882120U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109512355A (en) * | 2019-01-02 | 2019-03-26 | 珠海格力电器股份有限公司 | Dish-washing machine |
| CN112807826A (en) * | 2021-04-15 | 2021-05-18 | 李红 | Intelligent filtering device for intelligent water supply pipeline |
| CN113984717A (en) * | 2021-09-22 | 2022-01-28 | 深圳拓邦股份有限公司 | Object surface dirt degree detection device and cleaning equipment |
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