CN207689686U - A kind of anhydrous detection circuit and storage-type coffee machine of DC water pump - Google Patents
A kind of anhydrous detection circuit and storage-type coffee machine of DC water pump Download PDFInfo
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- CN207689686U CN207689686U CN201820058657.7U CN201820058657U CN207689686U CN 207689686 U CN207689686 U CN 207689686U CN 201820058657 U CN201820058657 U CN 201820058657U CN 207689686 U CN207689686 U CN 207689686U
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- anhydrous
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Abstract
The utility model provides a kind of anhydrous detection circuit and storage-type coffee machine of DC water pump, wherein the anhydrous detection circuit of DC water pump, including power circuit, micro-processor interface circuit, protection circuit, field-effect tube NQ1, resistance R3, resistance R4 and capacitance C2.The anhydrous detection circuit of DC water pump provided by the utility model; pass through the co-operation of power circuit, micro-processor interface circuit, protection circuit, field-effect tube NQ1, resistance R3, resistance R4 and capacitance C2; anhydrous detection can be realized without additional plug wire terminal, avoid dry combustion method problem；Meanwhile the anhydrous detection circuit of DC water pump provided by the utility model, it is simple in structure, practical, double check is realized, ensure that the accuracy of anhydrous detection.In addition storage-type coffee machine that the utility model provides avoids dry combustion method problem, ensure that the normal use of coffee machine, make to simplify the structure using such as the anhydrous detection circuit of the above-mentioned DC water pump, saving production cost.
Description
Technical field
The utility model is related to anhydrous detection circuit field, more particularly to the anhydrous detection circuit of a kind of DC water pump and storage
Ability of swimming coffee machine.
Background technology
Machine with DC water pump such as storage-type coffee machine on the market at present, anhydrous detection mostly use greatly flowmeter or suddenly
The detection mode of your element or tongue tube determines whether water.Such detection mode is of high cost, and needs that multiple band leads are arranged
Plug wire terminal the case where during use it occur frequently that with lead terminal wrong plug, causes can't detect anhydrous, it is existing dry combustion method occurs
As；In addition, existing anhydrous detection mode need to also consider rigging position problem, such as tongue tube on product structure, need to be arranged
Around DC water pump, it is also necessary to which externally-applied magnetic field makes the reed endpoint location inside tongue tube attract or disconnect, and can be only achieved nothing
The purpose of water detection；Its is complicated, and when product design also needs to reserved assembly space, increases the volume of product.
Utility model content
To solve the problems, such as to mention in above-mentioned background technology, a kind of anhydrous detection of DC water pump provided by the utility model
Circuit and storage-type coffee machine, the wherein anhydrous detection circuit of DC water pump, including power circuit, micro-processor interface circuit, protection electricity
Road, field-effect tube NQ1, resistance R3, resistance R4 and capacitance C2：
The power circuit input terminal is electrically connected with city, and output end is connect with micro-processor interface circuit；In the micro-processor interface circuit
Equipped with comparison module and Trend judgement module；The comparison module and Trend judgement module pass through second port and resistance R4 mono-
End is connected with the one end capacitance C2；The resistance R4 other ends are connect with the one end resistance R3 and field-effect tube NQ1 source electrodes；The field effect
Should pipe NQ1 grids connect with the one end resistance R2 and the one end resistance R1；The resistance R1 other ends connect with microprocessor first port
It connects；The field-effect tube NQ1 drain electrodes are respectively by protecting circuit and water pump to be connect with power circuit output end；The resistance R2 is another
One end, the resistance R3 other ends and the capacitance C2 other ends are grounded.
Further, the protection circuit includes capacitance C1 and diode D1；The one end the capacitance C1 and diode D1 sun
Pole is connected with field-effect tube NQ1 drain electrodes；The capacitance C1 other ends and diode D1 cathodes connect with power circuit output end
It connects.
Further, the model 4148 of the diode D1；The capacitance of the capacitance C1 is 0.05 μ F-0.2 μ F.
Further, the power circuit is resistance-capacitance depressurization power circuit or Switching Power Supply voltage-dropping power supply circuit.
Further, the field-effect tube NQ1 is N-type.
Further, the model UT3N06G of the field-effect tube NQ1.
Further, the resistance value of the resistance R1 is 45 Ω -53 Ω；The resistance value of the resistance R2 is 8K Ω -13K Ω；Institute
The resistance value for stating resistance R3 is 0.5 Ω -2 Ω；The resistance value of the resistance R4 is 0.5 Ω -2 Ω；The capacitance of the capacitance C2 is 0.05 μ
F-0.2μF。
The anhydrous detection circuit of DC water pump provided by the utility model passes through power circuit, micro-processor interface circuit, protection electricity
Road, field-effect tube NQ1, resistance R3, resistance R4 and capacitance C2 co-operation, the voltage of real-time detection resistance R3, and calculating
The current value of R3 is flowed through, corresponding is the operating current of water pump；Water is detected the presence of by comparing module；Pass through Trend judgement mould
Block judges the lifting trend of the electric current of water pump to detect the presence of water, realizes the anhydrous detection of DC water pump, avoids dry combustion method problem；
Meanwhile double check is also achieved, it ensure that the accuracy of anhydrous detection.The anhydrous inspection of DC water pump provided by the utility model
Slowdown monitoring circuit, it is simple in structure, practical, additional plug wire terminal need not be set, when avoiding use the problem of wrong plug terminal.
In addition storage-type coffee machine that the utility model provides, using the anhydrous detection of the as above arbitrary DC water pump
Circuit.
In addition storage-type coffee machine that the utility model provides avoids storage-type coffee machine dry combustion method problem, ensure that coffee
The normal use of coffee machine makes to simplify the structure, and saves production cost.
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
Some embodiments of the utility model, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the circuit diagram of the anhydrous detection circuit of DC water pump provided by the utility model；
Current value i when Fig. 2 has water for water pump1Schematic diagram；
Fig. 3 is current value i when water pump is anhydrous1Schematic diagram；
Fig. 4 is the relation schematic diagram of micro-processor interface circuit first port output level and pump switch.
Specific implementation mode
It is new below in conjunction with this practicality to keep the purpose, technical scheme and advantage of the utility model embodiment clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained without creative efforts belong to
The range of the utility model protection.
In the description of the present invention, it should be noted that term " first ", " second " and similar word not
It indicates any sequence, quantity or importance, and is the component part for having used differentiation different.The classes such as " connection " or " connected "
Like word and non-limiting with physics or the connection of machinery, but may include electrical connection, light connects etc., either directly
Or it is indirect.
The utility model embodiment provides a kind of anhydrous detection circuit and storage-type coffee machine of DC water pump, wherein straight
The anhydrous detection circuit of flowing water pump, including power circuit, micro-processor interface circuit, protection circuit, field-effect tube NQ1, resistance R3, resistance
R4 and capacitance C2：
The power circuit input terminal is electrically connected with city, and output end is connect with micro-processor interface circuit；In the micro-processor interface circuit
Equipped with comparison module and Trend judgement module；The comparison module and Trend judgement module pass through second port and resistance R4 mono-
End is connected with the one end capacitance C2；The resistance R4 other ends are connect with the one end resistance R3 and field-effect tube NQ1 source electrodes；The field effect
Should pipe NQ1 grids connect with the one end resistance R2 and the one end resistance R1；The resistance R1 other ends connect with microprocessor first port
It connects；The field-effect tube NQ1 drain electrodes are respectively by protecting circuit and water pump to be connect with power circuit output end；The resistance R2 is another
One end, the resistance R3 other ends and the capacitance C2 other ends are grounded.
When it is implemented, as shown in Figure 1, power circuit input terminal is electrically connected with city, output end is connect with micro-processor interface circuit,
Output end output+5V the voltages of power circuit；Comparison module and Trend judgement module are equipped in micro-processor interface circuit；Comparison module and
Trend judgement module is connect by second port with the one end resistance R4 and the one end capacitance C2；The resistance R4 other ends and resistance R3 mono-
End is connected with field-effect tube NQ1 source electrodes；Field-effect tube NQ1 grids are connect with the one end resistance R2 and the one end resistance R1；Resistance R1 is another
One end is connect with microprocessor first port；Field-effect tube NQ1 drain electrodes are respectively by protecting circuit and water pump and power circuit defeated
Outlet connects；The resistance R2 other ends, the resistance R3 other ends and the capacitance C2 other ends are grounded；Power circuit and micro-processor interface circuit
The equal grounding connection of ground terminal；Field-effect tube NQ1 is used to control the break-make of DC water pump；Micro-processor interface circuit by its first port and
The mode of the I/O interfaces acquisition AD of second port detects the presence of water；
When detection, (as shown in Figure 4) is connected in field-effect tube NQ1 by the first port output high level of micro-processor interface circuit, is made
Water pump works normally, the voltage value u at the both ends second port acquisition resistance R3 of micro-processor interface circuit1, resistance R3 other ends ground connection, electricity
Pressure is 0V, therefore the voltage of resistance R3 is u1- 0V=u1, i1=u1/ r obtains the current value i of resistance R31, current value i1It is corresponding to be
The operating current of water pump；Setting electric current value i is equipped in comparison module2, i2For by survey the water pump that obtains of survey calculation have water and
Current value when anhydrous, water pump electric current ix when anhydrous, water pump electric current iy when there is water, setting value i2=(ix+iy)/2；Compare
Module is by by electric current i1With setting electric current i2It is compared, works as i1<i2Then it is judged as anhydrous, works as i1≥i2Then it is judged as thering is water；
The current value i1There are the little situation of water and anhydrous phase difference, water pump can have consistency problem, work
Current value i1It also can be variant, it is possible to current value i of water pump when anhydrous1More than the setting electric current value i of microprocessor2, hair
Raw erroneous judgement.
To solve the problems, such as above-mentioned erroneous judgement, the utility model in micro-processor interface circuit by being provided with electric current i1Trend judgement
Module is to solve the problems, such as this, as current value i1When for a long time without significant change, then micro-processor interface circuit starts Trend judgement module and reaches
To anhydrous testing goal；The Trend judgement module and the second port and the one end resistance R4 and capacitance C2 by micro-processor interface circuit
One end connects；Electric current i is can determine whether by Trend judgement module1Lifting trend；As electric current i1There is downward trend, is then judged as nothing
Water, as electric current i1It is on the rise, then it is judged as thering is water.
As shown in figure 3, electric current i1Decline judges anhydrous basis：There is water power stream iy to be more than anhydrous electric current ix, i.e. iy>Ix, water
Pump is from there is water to anhydrous, pump power decline.
As shown in Fig. 2, electric current i1Rise and judges there is water foundation：Anhydrous electric current ix, which is less than, water power stream iy, i.e. ix<Iy, water
From anhydrous to there is water, pump power rises pump.
The utility model embodiment provide DC water pump anhydrous detection circuit, by power circuit, micro-processor interface circuit,
The co-operation of protection circuit, field-effect tube NQ1, resistance R3, resistance R4 and capacitance C2, the voltage of real-time detection resistance R3, and
The current value for flowing through R3 is calculated, corresponding is the operating current of water pump；Water is detected the presence of by comparing module；Pass through trend
Judgment module judges the lifting trend of the electric current of water pump to detect the presence of water；Double check is realized, ensure that anhydrous detection
Accuracy.The anhydrous detection circuit for the DC water pump that the utility model embodiment provides, it is simple in structure, practical, it need not be arranged
Additional plug wire terminal, when avoiding use the problem of wrong plug terminal.
Preferably, the protection circuit includes capacitance C1 and diode D1；The one end the capacitance C1 and diode D1 anodes
It drains and connects with the field-effect tube NQ1；The capacitance C1 other ends and diode D1 cathodes are connect with power circuit output end.
Preferably, the model 4148 of the diode D1；The capacitance of the capacitance C1 is 0.05 μ F-0.2 μ F.
When it is implemented, protection circuit includes capacitance C1 and diode D1；The one end capacitance C1 and diode D1 anodes and field
The NQ1 drain electrode connections of effect pipe；The capacitance C1 other ends and diode D1 cathodes are connect with power circuit output end；The type of diode D1
Number be 4148；The capacitance of capacitance C1 is 0.05 μ F-0.2 μ F；Field-effect tube NQ1 can be prevented disconnected by capacitance C1 and diode D1
When opening, electric current and/or voltage cause to damage to water pump.
Preferably, the power circuit is resistance-capacitance depressurization power circuit or Switching Power Supply voltage-dropping power supply circuit.
Preferably, the field-effect tube NQ1 is N-type.
Preferably, the model UT3N06G of the field-effect tube NQ1.
Preferably, the resistance value of the resistance R1 is 45 Ω -53 Ω；The resistance value of the resistance R2 is 8K Ω -13K Ω；It is described
The resistance value of resistance R3 is 0.5 Ω -2 Ω；The resistance value of the resistance R4 is 0.5 Ω -2 Ω；The capacitance of the capacitance C2 is 0.05 μ F-
0.2μF。
When it is implemented, the anhydrous detection circuit for the DC water pump that the utility model embodiment provides, each component are adopted
With parameter as described above, to ensure the normal work of circuit.
In addition storage-type coffee machine that the utility model provides, using the anhydrous detection of the as above arbitrary DC water pump
Circuit.
In addition storage-type coffee machine that the utility model embodiment provides avoids storage-type coffee machine dry combustion method problem, protects
The normal use for having demonstrate,proved coffee machine makes to simplify the structure, and saves production cost.
Although more herein used such as power circuit, micro-processor interface circuit, field-effect tube, diode, resistance, electricity
The terms such as appearance, but it does not preclude the possibility of using other terms.The use of these items is only for more easily describing and
Explain the essence of the utility model；Being construed as any one of the additional limitations all is disagreed with the spirit of the present invention
's.
Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model, rather than limits it
System；Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should
Understand：It still can be with technical scheme described in the above embodiments is modified, either to which part or whole
Technical characteristic carries out equivalent replacement；And these modifications or replacements, this practicality that it does not separate the essence of the corresponding technical solution are new
The range of each embodiment technical solution of type.
Claims (8)
1. a kind of anhydrous detection circuit of DC water pump, which is characterized in that including power circuit, micro-processor interface circuit, protection circuit,
Field-effect tube NQ1, resistance R3, resistance R4 and capacitance C2：
The power circuit input terminal is electrically connected with city, and output end is connect with micro-processor interface circuit；It is equipped in the micro-processor interface circuit
Comparison module and Trend judgement module；The comparison module and Trend judgement module by second port and the one end resistance R4 and
The one end capacitance C2 connects；The resistance R4 other ends are connect with the one end resistance R3 and field-effect tube NQ1 source electrodes；The field-effect tube
NQ1 grids are connect with the one end resistance R2 and the one end resistance R1；The resistance R1 other ends are connect with microprocessor first port；Institute
Field-effect tube NQ1 drain electrodes are stated respectively by protecting circuit and water pump to be connect with power circuit output end；The resistance R2 other ends,
The resistance R3 other ends and the capacitance C2 other ends are grounded.
2. the anhydrous detection circuit of DC water pump according to claim 1, it is characterised in that：The protection circuit includes electricity
Hold C1 and diode D1；The one end the capacitance C1 and diode D1 anodes are connected with field-effect tube NQ1 drain electrodes；The capacitance
The C1 other ends and diode D1 cathodes are connect with power circuit output end.
3. the anhydrous detection circuit of DC water pump according to claim 2, it is characterised in that：The model of the diode D1
It is 4148；The capacitance of the capacitance C1 is 0.05 μ F-0.2 μ F.
4. the anhydrous detection circuit of DC water pump according to claim 1, it is characterised in that：The power circuit is capacitance-resistance
Voltage-dropping power supply circuit or Switching Power Supply voltage-dropping power supply circuit.
5. the anhydrous detection circuit of DC water pump according to claim 1, it is characterised in that：The field-effect tube NQ1 is N
Type.
6. the anhydrous detection circuit of DC water pump according to claim 5, it is characterised in that：The field-effect tube NQ1's
Model UT3N06G.
7. the anhydrous detection circuit of DC water pump according to claim 1, it is characterised in that：The resistance value of the resistance R1 is
45Ω-53Ω；The resistance value of the resistance R2 is 8K Ω -13K Ω；The resistance value of the resistance R3 is 0.5 Ω -2 Ω；The resistance R4
Resistance value be 0.5 Ω -2 Ω；The capacitance of the capacitance C2 is 0.05 μ F-0.2 μ F.
8. a kind of storage-type coffee machine, it is characterised in that：Using the anhydrous of such as claim 1-7 any one of them DC water pump
Detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820058657.7U CN207689686U (en) | 2018-01-15 | 2018-01-15 | A kind of anhydrous detection circuit and storage-type coffee machine of DC water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820058657.7U CN207689686U (en) | 2018-01-15 | 2018-01-15 | A kind of anhydrous detection circuit and storage-type coffee machine of DC water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207689686U true CN207689686U (en) | 2018-08-03 |
Family
ID=62990967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820058657.7U Active CN207689686U (en) | 2018-01-15 | 2018-01-15 | A kind of anhydrous detection circuit and storage-type coffee machine of DC water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207689686U (en) |
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2018
- 2018-01-15 CN CN201820058657.7U patent/CN207689686U/en active Active
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