CN201277999Y - Positive and negative wave form detection circuit for electric grid and refrigerator with such circuit - Google Patents
Positive and negative wave form detection circuit for electric grid and refrigerator with such circuit Download PDFInfo
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- CN201277999Y CN201277999Y CNU2008201880884U CN200820188088U CN201277999Y CN 201277999 Y CN201277999 Y CN 201277999Y CN U2008201880884 U CNU2008201880884 U CN U2008201880884U CN 200820188088 U CN200820188088 U CN 200820188088U CN 201277999 Y CN201277999 Y CN 201277999Y
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Abstract
The utility model relates to an electric network positive and negative waveform detection circuit, in particular to a refrigerator with the electric network positive and negative waveform detection circuit, which provides an alternative electric network positive and negative waveform detection circuit which can detect the waveform of an electric network in time when an appliance is started and a refrigerator with the alternative electric network positive and negative waveform detection circuit. The electric network positive and negative waveform detection circuit comprises a single-chip microcomputer and further comprises a zero cross detection circuit; the zero cross detection circuit is connected with the single-chip microcomputer, wherein the zero cross detection circuit comprises resistors R1, R3 and R4, diodes D1 and D2 and an optical coupler N19; the optical coupler N19 comprises a diode and an audion; wherein one end of the resistor R1 is connected with a power source, and the other end of the resistor R1 is connected with the anode of the diode D1; the cathode of the diode D1 is connected with the anode of the diode in the optical coupler; the anode of the diode D2 is connected between the cathode of the diode D1 and the anode of the optical coupler, and the cathode of the diode D2 is connected between the cathode of the of the optical coupler and the power source; and the collector electrode of the audion in the optical coupler is connected with the resistors R3 and R4; the other end of the resistor R3 is connected with the power source; and the other end of the resistor R4 is connected with the single-chip microcomputer. The power source connected with the resistor R3 is 5 V.
Description
Technical field
The utility model relates to a kind of electric network positive and negative waveform detection circuit, relates in particular to a kind of refrigerator that has the electric network positive and negative waveform detection circuit.
Background technology
Refrigerator of the prior art generally all is not provided with the electric network positive and negative waveform detection circuit, and the circuit waveform of electrical network is sinusoidal wave, and in refrigerator circuit control field, some parts usually need be in the positive half cycle or the negative half period conducting of electrical network, for example, and solenoid valve.But in use, we can't detect replacing of electrical network waveform, be that the electrical network waveform is when being in zero point, we can't in time connect the parts that need the 220V power supply, the turn-on current of parts is just bigger so, be that dash current is bigger, shortened the life-span of parts so greatly.
Summary of the invention
The purpose of this utility model is to overcome above defective, provides a kind of when appliance starting, can in time detect the electric network positive and negative waveform detection circuit that replaces of electrical network waveform and the refrigerator that has sort circuit.
The technical scheme of electric network positive and negative waveform detection circuit of the present utility model is such: it comprises resistance R 1, R3, R4, diode D1, D2, optocoupler N19, optocoupler N19 comprises diode and triode, wherein resistance R 1 one ends are connected with power supply, the other end is connected with the positive pole of diode D1, the positive pole of the diode in the negative pole of diode D1 and the optocoupler is connected, the positive pole of diode D2 is connected between the positive pole of the negative pole of diode D1 and optocoupler, negative pole is connected between the negative pole and power supply of optocoupler, the collector of the triode in the optocoupler and resistance R 3, R4 connects, and the other end of resistance R 3 is connected with power supply, and the power supply that resistance R 3 connects is 5 volts.
The refrigerator technical scheme that has the electric network positive and negative waveform detection circuit of the present utility model is such: it comprises single-chip microcomputer, it also comprises zero cross detection circuit, zero cross detection circuit is connected with single-chip microcomputer, wherein zero cross detection circuit comprises resistance R 1, R3, R4, diode D1, D2, optocoupler N19, optocoupler N19 comprises diode and triode, wherein resistance R 1 one ends are connected with power supply, the other end is connected with the positive pole of diode D1, the positive pole of the diode in the negative pole of diode D1 and the optocoupler is connected, the positive pole of diode D2 is connected between the positive pole of the negative pole of diode D1 and optocoupler, and negative pole is connected between the negative pole and power supply of optocoupler, the collector of the triode in the optocoupler and resistance R 3, R4 connects, the other end of resistance R 3 is connected with power supply, and the other end of resistance R 4 is connected with single-chip microcomputer.The power supply that resistance R 3 connects is 5 volts.
Electric network positive and negative waveform detection circuit of the present utility model, can detect in real time is the moment that the electrical network waveform is in zero point, in time connect the parts that need the 220V power supply then as required, the turn-on current of parts is just very little so, be that dash current is little, we so in life-span of elongated component greatly just.
Description of drawings
Fig. 1 is the structural representation that has the refrigerator of electric network positive and negative waveform detection circuit of the present utility model.
Embodiment
Embodiment 1:
As shown in the figure, it comprises single-chip microcomputer the refrigerator that has an electric network positive and negative waveform detection circuit of the present utility model, it also comprises zero cross detection circuit, zero cross detection circuit is connected with single-chip microcomputer, wherein zero cross detection circuit comprises resistance R 1, R3, R4, diode D1, D2, optocoupler N19, optocoupler N19 comprises diode and triode, wherein resistance R 1 one ends are connected with power supply, the other end is connected with the positive pole of diode D1, and the positive pole of the diode in the negative pole of diode D1 and the optocoupler is connected, and the positive pole of diode D2 is connected between the positive pole of the negative pole of diode D1 and optocoupler, negative pole is connected between the negative pole and power supply of optocoupler, the collector of the triode in the optocoupler and resistance R 3, R4 connects, and the other end of resistance R 3 is connected with power supply, and the other end of resistance R 4 is connected with single-chip microcomputer.The power supply that resistance R 3 connects is 5 volts.
The principle of work that has the refrigerator of electric network positive and negative waveform detection circuit:
If line voltage 220V is in positive half cycle, line voltage is by the light emitting diode conducting among R1, D1, the N19.Optocoupler N19 triode is conducting ground connection also, and the detected level of single-chip microcomputer is a low level so.
If line voltage 220V is in negative half period, optocoupler can conducting so, and the detected level of single-chip microcomputer is a high level.
Thereby can detect the zero point of electrical network in real time, in time connect parts in the refrigerator, effectively reduce the dash current of these parts, prolong the serviceable life of parts.
Among the figure:
D2 mainly is the light emitting diode of clamped N109 for the protection diode.Make the light emitting diode reverse voltage of N19 unlikely excessive and damage.
D1 is the reducing power consumption diode.When electrical network was in negative half period, the reverse partition by D1 did not form current return, and the last pressure drop of R1 is 0, did not have power consumption penalty on the R1 fully.
Embodiment 2:
Present embodiment is a washing machine.
Embodiment 3:
Present embodiment is an air-conditioning.
Electric network positive and negative waveform detection circuit of the present utility model can be used in any circuit, can directly detect user-network access voltage 220V; Also can detect transformer secondary output end output voltage, the resistance that only need to adjust resistance R 1 this moment gets final product.
Claims (4)
1. electric network positive and negative waveform detection circuit, it is characterized in that: it comprises resistance R 1, R3, R4, diode D1, D2, optocoupler N19, optocoupler N19 comprises diode and triode, wherein resistance R 1 one ends are connected with power supply, the other end is connected with the positive pole of diode D1, the positive pole of the diode in the negative pole of diode D1 and the optocoupler is connected, the positive pole of diode D2 is connected between the positive pole of the negative pole of diode D1 and optocoupler, negative pole is connected between the negative pole and power supply of optocoupler, the collector of the triode in the optocoupler and resistance R 3, R4 connects, and the other end of resistance R 3 is connected with power supply.
2. electric network positive and negative waveform detection circuit according to claim 1 is characterized in that: the power supply that resistance R 3 connects is 5 volts.
3. refrigerator that is provided with the described electric network positive and negative waveform detection circuit of claim 1, it comprises single-chip microcomputer, it is characterized in that, it also comprises zero cross detection circuit, zero cross detection circuit is connected with single-chip microcomputer, wherein zero cross detection circuit comprises resistance R 1, R3, R4, diode D1, D2, optocoupler N19, optocoupler N19 comprises diode and triode, and wherein resistance R 1 one ends are connected with power supply, and the other end is connected with the positive pole of diode D1, the positive pole of the diode in the negative pole of diode D1 and the optocoupler is connected, the positive pole of diode D2 is connected between the positive pole of the negative pole of diode D1 and optocoupler, and negative pole is connected between the negative pole and power supply of optocoupler, the collector of the triode in the optocoupler and resistance R 3, R4 connects, the other end of resistance R 3 is connected with power supply, and the other end of resistance R 4 is connected with single-chip microcomputer.
4. the refrigerator that has the electric network positive and negative waveform detection circuit according to claim 3 is characterized in that: the power supply that resistance R 3 connects is 5 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201880884U CN201277999Y (en) | 2008-09-09 | 2008-09-09 | Positive and negative wave form detection circuit for electric grid and refrigerator with such circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201880884U CN201277999Y (en) | 2008-09-09 | 2008-09-09 | Positive and negative wave form detection circuit for electric grid and refrigerator with such circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201277999Y true CN201277999Y (en) | 2009-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201880884U Expired - Fee Related CN201277999Y (en) | 2008-09-09 | 2008-09-09 | Positive and negative wave form detection circuit for electric grid and refrigerator with such circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN201277999Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062810A (en) * | 2010-12-14 | 2011-05-18 | 江苏大学 | Detection circuit and method for zero crossing point of alternating current power supply |
| CN102411082A (en) * | 2011-07-29 | 2012-04-11 | 深圳和而泰智能控制股份有限公司 | Energy-saving zero crossing detection circuit and apparatus thereof |
| CN102879633A (en) * | 2012-09-25 | 2013-01-16 | 上海微频莱机电科技有限公司 | Safety protective structure of zero-crossing detection circuit |
| CN103389401A (en) * | 2013-07-15 | 2013-11-13 | 汕头市超声仪器研究所有限公司 | Power grid voltage detection device |
| CN105675968A (en) * | 2016-04-08 | 2016-06-15 | 南京工程学院 | High-precision three-phase AC signal positive-negative zero-crossing detecting device and method |
| CN106771529A (en) * | 2016-11-25 | 2017-05-31 | 安徽美芝制冷设备有限公司 | Refrigerator and the zero cross detection circuit for refrigerator |
| CN106841762A (en) * | 2017-02-08 | 2017-06-13 | 广东美的厨房电器制造有限公司 | Zero cross detection circuit and home appliance |
-
2008
- 2008-09-09 CN CNU2008201880884U patent/CN201277999Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062810A (en) * | 2010-12-14 | 2011-05-18 | 江苏大学 | Detection circuit and method for zero crossing point of alternating current power supply |
| CN102411082A (en) * | 2011-07-29 | 2012-04-11 | 深圳和而泰智能控制股份有限公司 | Energy-saving zero crossing detection circuit and apparatus thereof |
| CN102879633A (en) * | 2012-09-25 | 2013-01-16 | 上海微频莱机电科技有限公司 | Safety protective structure of zero-crossing detection circuit |
| CN103389401A (en) * | 2013-07-15 | 2013-11-13 | 汕头市超声仪器研究所有限公司 | Power grid voltage detection device |
| CN103389401B (en) * | 2013-07-15 | 2015-11-25 | 汕头市超声仪器研究所有限公司 | A kind of electric network voltage detection device |
| CN105675968A (en) * | 2016-04-08 | 2016-06-15 | 南京工程学院 | High-precision three-phase AC signal positive-negative zero-crossing detecting device and method |
| CN106771529A (en) * | 2016-11-25 | 2017-05-31 | 安徽美芝制冷设备有限公司 | Refrigerator and the zero cross detection circuit for refrigerator |
| CN106841762A (en) * | 2017-02-08 | 2017-06-13 | 广东美的厨房电器制造有限公司 | Zero cross detection circuit and home appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20110909 |