CN207248967U - Device and electric appliance for voltage detecting - Google Patents
Device and electric appliance for voltage detecting Download PDFInfo
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- CN207248967U CN207248967U CN201721375759.3U CN201721375759U CN207248967U CN 207248967 U CN207248967 U CN 207248967U CN 201721375759 U CN201721375759 U CN 201721375759U CN 207248967 U CN207248967 U CN 207248967U
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Abstract
The utility model embodiment provides a kind of device and electric appliance for voltage detecting, belongs to appliance field.The device for voltage detecting includes：Switching mode power supply transformer, the input winding connection High Level AC Voltage of the switching mode power supply transformer, output winding and the voltage detection module of the switching mode power supply transformer are electrically connected；And the voltage detection module, for detecting the voltage from the output winding, and via detection voltage output port output detection signal.Monitoring in real time and the security isolation to voltage check device are carried out to the voltage during electric operation through the above technical solutions, can realize.And then working procedure can be adjusted according to the line voltage judged so that electric appliance complete machine working effect is more reliable and more stable.
Description
Technical field
Appliance field is the utility model is related to, more particularly to a kind of device and electric appliance for voltage detecting.
Background technology
There is fluctuation in the voltage of mains power grid, but the resistance value of the load of household electrical appliance is certain, is so easy for
The power of electric appliance is caused to influence the performance of complete machine there is also fluctuation, cause using effect bad.Especially for soy bean milk making machine, break
The electric appliances such as wall machine, due to the fluctuation of voltage, can cause the real output of heat-generating pipe to change, so cause food overflow or
Be boil it is not yet done.And in the prior art, many household electrical appliance lack voltage check device, can not realize the real-time monitoring to voltage.
Utility model content
The purpose of the utility model embodiment is to provide a kind of device and electric appliance for voltage detecting, existing at least to solve
There is the problem of electric appliance in technology can not carry out voltage detecting.
To achieve these goals, the utility model embodiment provides a kind of device for voltage detecting, described device
Including：Switching mode power supply transformer, the input winding connection High Level AC Voltage of the switching mode power supply transformer, the Switching Power Supply become
The output winding of depressor is electrically connected with voltage detection module；And the voltage detection module, for detecting from described defeated
Go out the voltage of winding, and via detection voltage output port output detection signal.
Alternatively, the voltage detection module includes:First diode, first Diode series are in the detection electricity
Press between output port and the output winding.
Alternatively, described device further includes low pressure output module, the output winding by the low pressure output module with
Load is electrically connected, and the low pressure output module includes the second diode, and second diode and the output winding are electrical
Connection, and with first diodes in parallel.
Alternatively, the conducting direction of the conducting direction of first diode and second diode is opposite.
Alternatively, the voltage detection module further includes：First divider resistance, is connected on first diode and described
Between detection voltage output port；Second divider resistance, its one end are connected to first divider resistance and the detection voltage
Between output port, other end ground connection；And first capacitance, its one end are connected to first divider resistance and the detection electricity
Between pressing output port, other end ground connection.
Alternatively, the voltage detection module further include be series at it is described detection voltage output port and high level power supply it
Between pull-up resistor.
Alternatively, institute's voltage detection module further includes：3rd resistor, is series at first diode and the first partial pressure electricity
Between resistance；And second capacitance, its one end are connected between the 3rd resistor and first divider resistance, another termination
Ground.
Alternatively, the low pressure output module further includes the 4th resistance and the 3rd being connected with second diodes in parallel
Capacitance, the 4th resistance and the 3rd capacitance are connected in series.
Alternatively, the low pressure output module, which further includes, is series at after second diode and in parallel with the load
Filter circuit.
Alternatively, the filter circuit includes the capacitance and resistance in parallel with the load.
The utility model embodiment also provides a kind of electric appliance, and the electric appliance includes the above-mentioned device for voltage detecting.
Monitoring in real time is carried out to the voltage during electric operation and to voltage through the above technical solutions, can realize
The security isolation of detection device.In the above-mentioned technical solutions, due to the output winding and input winding one of switching mode power supply transformer
It is fixed, so that when the voltage of the High Level AC Voltage from mains power grid of input fluctuates, switching mode power supply transformer
The voltage that output winding induces can also fluctuate accordingly, and the voltage signal of voltage detection module output can also change accordingly.
The control chip of electric appliance can judge line voltage according to the detection signal that voltage detection module is fed back at this time, so as to adjust work
Make program so that electric appliance complete machine working effect is more reliable and more stable.
The further feature and advantage of the utility model embodiment will give specifically in subsequent specific embodiment part
It is bright.
Brief description of the drawings
Attached drawing is that the utility model embodiment is further understood for providing, and a part for constitution instruction,
With being used to explain the utility model embodiment together with following embodiment, but do not form to the utility model embodiment
Limitation.In the accompanying drawings：
Fig. 1 is the block diagram for the device for voltage detecting that a kind of embodiment of the utility model provides；
Fig. 2 is the block diagram for the device for voltage detecting that a kind of optional embodiment of the utility model provides；And
Fig. 3 is the circuit diagram for the device for voltage detecting that a kind of optional embodiment of the utility model provides.
Description of reference numerals
10 voltage detection module of TR switching mode power supply transformers
20 control chip, 30 low pressure output module
40 load the first diodes of D1
D2 the second diode the first divider resistances of R1
R2 the second divider resistance R3 3rd resistors
The 4th resistance R5 pull-up resistors of R4
R6 resistance the first capacitances of EC1
The 3rd capacitances of the second capacitances of C2 C3
EC4 electrolytic capacitor C5 capacitances
AD detection voltage outputs port
Embodiment
The embodiment of the utility model embodiment is described in detail below in conjunction with attached drawing.It should be understood that
It is that specific embodiment described herein is merely to illustrate and explains the utility model embodiment, is not limited to this reality
Use new embodiment.
Fig. 1 is the block diagram for the device for voltage detecting that a kind of embodiment of the utility model provides.As shown in Figure 1,
The utility model embodiment provides a kind of device for voltage detecting, which includes：Switching mode power supply transformer TR, this is opened
Closing power transformer TR includes input winding and output winding, the input winding connection High Level AC Voltage, the output winding
It is electrically connected with voltage detection module 10；And voltage detection module 10, for detecting the voltage from the output winding, and
Via detection voltage output port output detection signal.
Wherein, detect voltage output port and the control chip 20 of electric appliance is electrically connected, detection signal is via detection voltage
Output port, which is exported to control chip 20, control chip 20, to be judged according to the detection signal that voltage detection module 10 exports
Line voltage, so as to adjust working procedure so that electric appliance complete machine working effect is more reliable and more stable.
Monitoring in real time is carried out to the voltage during electric operation and to voltage through the above technical solutions, can realize
The security isolation of detection device.In the above-mentioned technical solutions, due to the output winding and input winding of switching mode power supply transformer TR
Necessarily, so that when the voltage of the High Level AC Voltage from mains power grid of input fluctuates, switching voltage transformer
The voltage that the output winding of TR induces can also fluctuate accordingly, and the voltage signal that voltage detection module 10 exports also can be corresponding
Change.The control chip 20 of electric appliance can judge line voltage according to the detection signal that voltage detection module 10 is fed back at this time,
So as to adjust working procedure so that electric appliance complete machine working effect is more reliable and more stable.In addition, the circuit in many electric appliances includes
Switching mode power supply transformer, therefore directly low-voltage control signal can be realized using switching mode power supply transformer existing in electric appliance
Security isolation between (Safety Extra Low Voltage) and High Voltage electric signal (electric main), without being separately provided the devices such as mutual inductor
To carry out security isolation, so as to reduce cost.
Fig. 2 is the block diagram for the device for voltage detecting that a kind of optional embodiment of the utility model provides.Such as Fig. 2 institutes
Show, the device for voltage detecting includes switching mode power supply transformer TR, voltage detection module 10 and low pressure output module 30.
The output winding of switching mode power supply transformer TR is electrically connected by low pressure output module 30 and load 40.Wherein, voltage detecting mould
Block 10 includes the first diode, and first Diode series are in the output of detection voltage output port and switching mode power supply transformer TR
Between winding.The low pressure output module 30 includes the second diode, and second diode is defeated with switching mode power supply transformer TR's
Go out winding electric connection, and with the first diodes in parallel, and the conducting of the conducting direction of the first diode and the second diode
Direction is opposite.
In the above-mentioned technical proposal of the application, the first diode and the second diode are used for from switching mode power supply transformer
The ac voltage signal of the output winding output of TR carries out rectification.Due to the conducting direction phase of the first diode and the second diode
Instead, therefore two half-wave voltage signals of different directions may be respectively used for voltage detecting and load work in above-mentioned ac voltage signal
Make, so as to be sufficiently used the ac voltage signal.
Fig. 3 is the circuit diagram for the device for voltage detecting that a kind of optional embodiment of the utility model provides.Such as Fig. 3
Shown, 1,2 feet of switching mode power supply transformer TR are the contact of input winding in circuit diagram, connect the switch electricity being connected with electric main
Source chip circuit；6,7 feet of switching mode power supply transformer TR are the contact of output winding, low-voltage circuit are connect, with low pressure output module
It is electrically connected, the low voltage control chip, anti-overflow detection, button and/or display even load for electric appliance provide operating voltage.
In a kind of optional embodiment of the application, switching mode power supply transformer TR can also include feedback winding or auxiliary around
Group, 4,5 feet of switching mode power supply transformer TR are the contact of feedback winding or auxiliary winding in figure 3.The feedback winding or auxiliary
The reversed current feed circuit of winding, for carrying out Voltage Feedback, the Switching Power Supply core to the switching power source chip of switching voltage transformer TR
Piece can be adjusted input voltage according to the feedback, to ensure output voltage stabilization.
Wherein, voltage detection module can include following device：First diode D1, the first divider resistance R1, pull-up electricity
Hinder R5, the second divider resistance R2 and the first capacitance EC1.The low pressure output winding of switching mode power supply transformer TR is inputted by sensing
The high-frequency pulse signal of winding, the one-way conduction through the first diode D1, through the first divider resistance R1 and the second partial pressure electricity after
Hinder R2 and carry out partial pressure and the first capacitance EC1 filtering, the detection signal of final output voltage.Detect voltage output port AD and electricity
The detection port of control chip is electrically connected in the low-voltage control circuit of device, and the detection signal passes through the detection voltage output
Port AD is transferred to the control chip of electric appliance, and the control chip of electric appliance can be sentenced according to the detection signal that voltage detection module is transmitted
Break and line voltage, so as to adjust working procedure so that electric appliance complete machine working effect is more reliable and more stable.Wherein, the pull-up
Resistance R5, which is series at, is used for the detection for drawing high the control chip between detection voltage output port AD and the high level power supply
The level of port, the high level power supply can be, for example ,+5V voltage sources.
In the application optional embodiment, the voltage detection module can also include 3rd resistor R3 and the second capacitance
C2,3rd resistor R3 and the second capacitance C2 are used to be filtered the voltage signal after the first diode D1 rectifications.
In the preferred embodiment of the application, the resistance value of the 3rd resistor R3 can be, for example, 100 Ω, and described second
The capacitance of capacitance C2 can be, for example, 0.1uF, and the resistance value of the first divider resistance R1 can be, for example, 2M Ω, the pull-up
The resistance value of resistance R5 can be, for example, that 100k Ω, the resistance value of the second divider resistance R2 can be, for example, 1M Ω, and described first
Capacitance EC1 can be, for example, the electrolytic capacitor that capacitance is 4.7uF.
Low pressure output module can include following device：Second diode D2, the 4th resistance R4, the 3rd capacitance C3 and filter
Ripple circuit.The low pressure output winding of switching mode power supply transformer TR inputs the high-frequency pulse signal of winding by sensing, and forms isolation
Voltage signal exports, and direct current signal is exported by the second diode D2 rectifications, which is filtered shaping,
So as to export stable safety low-pressure direct current signal.Wherein, the filter circuit can be in parallel by electrolytic capacitor EC4 and resistance R6
Composition.In a preferred embodiment, the filter circuit can also be in parallel by electrolytic capacitor EC4, resistance R6 and capacitance C5
Composition.The 4th resistance R4 and the 3rd capacitance C3 is in parallel with the second diode D2, for eliminating in output voltage signal
Burr.In a kind of preferred embodiment of the utility model, the diode D2 can be fast recovery diode.
The utility model embodiment also provides a kind of electric appliance, and the electric appliance includes the above-mentioned dress for voltage detecting
Put.
Monitoring in real time is carried out to the voltage during electric operation and to voltage through the above technical solutions, can realize
The security isolation of detection device.In the above-mentioned technical solutions, due to the output winding and input winding one of switching mode power supply transformer
It is fixed, so that when the voltage of the High Level AC Voltage from mains power grid of input fluctuates, switching mode power supply transformer
The voltage that output winding induces can also fluctuate accordingly, and the voltage signal of voltage detection module output can also change accordingly.
The control chip of electric appliance can judge line voltage according to the detection signal that voltage detection module is fed back at this time, so as to adjust work
Make program so that electric appliance complete machine working effect is more reliable and more stable.In addition, the circuit in many electric appliances includes Switching Power Supply change
Depressor, therefore directly low-voltage control signal (Safety Extra Low Voltage) and height can be realized using switching mode power supply transformer in electric appliance
Security isolation between pressure electric signal (electric main), security isolation is carried out without being separately provided the devices such as mutual inductor, from
And reduce cost.Can be d. c. voltage signal by ac voltage signal rectification by diode, which passes through filter
Wave circuit is filtered, and to obtain the d. c. voltage signal of smooth steady, ensures that the load in circuit being capable of safe and stable operation
And voltage detecting result is accurately and reliably.
The optional embodiment of the utility model embodiment, still, the utility model are described in detail above in association with attached drawing
Embodiment is not limited to the detail in the above embodiment, can in the range of the technology design of the utility model embodiment
To carry out a variety of simple variants to the technical solution of the utility model embodiment, these simple variants belong to the utility model reality
Apply the protection domain of example.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the utility model is implemented
Example no longer separately illustrates various combinations of possible ways.
It will be appreciated by those skilled in the art that realize that all or part of step in above-described embodiment method is to pass through
Program instructs relevant hardware to complete, and the program storage is in the storage medium, including some instructions are used so that single
Piece machine, chip or processor (processor) perform all or part of step of each embodiment the method for the application.It is and preceding
The storage medium stated includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), random access memory
(RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
In addition, can also be combined between a variety of embodiments of the utility model embodiment, as long as
, without prejudice to the thought of the utility model embodiment, it should equally be considered as the utility model embodiment disclosure of that for it.
Claims (11)
1. a kind of device for voltage detecting, it is characterised in that described device includes：
Switching mode power supply transformer, the input winding connection High Level AC Voltage of the switching mode power supply transformer, the Switching Power Supply become
The output winding of depressor is electrically connected with voltage detection module；And
The voltage detection module, for detecting the voltage from the output winding, and it is defeated via detection voltage output port
Go out to detect signal.
2. device according to claim 1, it is characterised in that the voltage detection module includes:
First diode, first Diode series are between the detection voltage output port and the output winding.
3. the apparatus of claim 2, it is characterised in that described device further includes low pressure output module, the output
Winding is electrically connected by the low pressure output module and load, and the low pressure output module includes the second diode, and described the
Two diodes with it is described output winding be electrically connected, and with first diodes in parallel.
4. device according to claim 3, it is characterised in that the conducting direction of first diode and the described 2nd 2
The conducting direction of pole pipe is opposite.
5. the apparatus of claim 2, it is characterised in that the voltage detection module further includes：
First divider resistance, is connected between first diode and the detection voltage output port；
Second divider resistance, its one end is connected between first divider resistance and the detection voltage output port, another
End ground connection；And
First capacitance, its one end are connected between first divider resistance and the detection voltage output port, another termination
Ground.
6. device according to claim 5, it is characterised in that the voltage detection module, which further includes, is series at the detection
Pull-up resistor between voltage output port and high level power supply.
7. device according to claim 5, it is characterised in that institute's voltage detection module further includes：
3rd resistor, is series between first diode and the first divider resistance；And
Second capacitance, its one end are connected between the 3rd resistor and first divider resistance, other end ground connection.
8. device according to claim 3, it is characterised in that the low pressure output module further includes and the two or two pole
The 4th resistance and the 3rd capacitance that pipe is connected in parallel, the 4th resistance and the 3rd capacitance are connected in series.
9. device according to claim 3, it is characterised in that the low pressure output module, which further includes, is series at described second
After diode and the filter circuit in parallel with the load.
10. device according to claim 9, it is characterised in that the filter circuit includes the electricity in parallel with the load
Appearance and resistance.
11. a kind of electric appliance, it is characterised in that the voltage that is used for that the electric appliance is included as described in claim 1-10 any one is examined
The device of survey.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721375759.3U CN207248967U (en) | 2017-10-23 | 2017-10-23 | Device and electric appliance for voltage detecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721375759.3U CN207248967U (en) | 2017-10-23 | 2017-10-23 | Device and electric appliance for voltage detecting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207248967U true CN207248967U (en) | 2018-04-17 |
Family
ID=61882919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721375759.3U Active CN207248967U (en) | 2017-10-23 | 2017-10-23 | Device and electric appliance for voltage detecting |
Country Status (1)
| Country | Link |
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| CN (1) | CN207248967U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836999A (en) * | 2019-07-10 | 2020-02-25 | 浙江绍兴苏泊尔生活电器有限公司 | Voltage detection method, voltage detection circuit, food processor working circuit and food processor |
-
2017
- 2017-10-23 CN CN201721375759.3U patent/CN207248967U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836999A (en) * | 2019-07-10 | 2020-02-25 | 浙江绍兴苏泊尔生活电器有限公司 | Voltage detection method, voltage detection circuit, food processor working circuit and food processor |
| CN110836999B (en) * | 2019-07-10 | 2022-03-01 | 浙江绍兴苏泊尔生活电器有限公司 | Voltage detection method, voltage detection circuit, food processor working circuit and food processor |
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