CN104038189A - Standby circuit for household electric appliances - Google Patents
Standby circuit for household electric appliances Download PDFInfo
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- CN104038189A CN104038189A CN201410287871.6A CN201410287871A CN104038189A CN 104038189 A CN104038189 A CN 104038189A CN 201410287871 A CN201410287871 A CN 201410287871A CN 104038189 A CN104038189 A CN 104038189A
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Abstract
The invention discloses a standby circuit for household electric appliances. The standby circuit comprises a control circuit, a power circuit and an overvoltage protection circuit. The power circuit of a main unit is switched off instead of being switched on and is controlled by the control circuit which comprises triodes Q1 and Q2, resistors R6, R7, R8, R9 and R10 and a bidirectional thyristor QK, and accordingly power consumption of circuits of the main unit can be prevented in standby periods. The standby circuit has the advantages that a power source of the main unit can be automatically switched off when the corresponding electric appliance stops working or voltages of the power source are higher than rated values, so that power consumption can be reduced, and the circuits of the main unit can be protected; the power consumption is lower than 0.01 watt in the standby periods, and overvoltage protection effects can be realized even under the condition that voltages reach 400 volts; the standby circuit is applicable to the various household electric appliances such as washing machines, induction cookers, desktop computers and microwave ovens which are not provided with remote controls, accordingly, the standby power consumption can be reduced, and the standby reliability can be improved.
Description
Technical field
The present invention relates to a kind of household electrical appliance stand-by circuit.
Background technology
At present, along with efficiency is improved in the whole world, the continuous enhancing of energy-saving and emission-reduction consciousness, improves power supply conversion efficiency, reduces stand-by power consumption and becomes the focus that industry is paid close attention to.After household electrical appliance shutdown, for start next time facilitates its power circuit still in work, be called standby.Because design is unreasonable, often there are two problems: 1, power consumption is larger, causes waste in present stand-by circuit.2, reliability is poor, when supply voltage is abnormal, easily breaks down.
Summary of the invention
For solving above technical deficiency, the invention provides a kind of reliability high, the household electrical appliance stand-by circuit that power consumption is low.
The present invention is achieved by the following measures:
A kind of household electrical appliance stand-by circuit of the present invention, comprises control circuit, power circuit and overvoltage crowbar;
Described overvoltage crowbar comprises the protection branch road being connected in parallel on power supply, and described protection is propped up route capacitor C 1, light-emitting diode D2, diode D1, resistance R 2 and resistance R 1 and is composed in series, and capacitor C 1 is parallel with resistance R 3;
Described power circuit comprises the power supply branch road being connected in parallel on power supply, and described power supply is propped up route diode D3, capacitor C 2 and resistance R 4 and is composed in series, and diode D3 is parallel with the series arm being comprised of diode D4 and capacitor C 3;
Described control circuit comprises triode Q1, triode Q2 and bidirectional triode thyristor QK, the base stage of triode Q1 is connected with the series arm being comprised of resistance R 8, linked switch SA, resistance R 6 and capacitor C 3, between the base stage of triode Q1 and capacitor C 1, is connected with resistance R 5; Between the base stage of the collector electrode of triode Q1 and triode Q2, be connected with resistance R 9, between the control utmost point of the collector electrode of triode Q2 and bidirectional triode thyristor QK, be connected with resistance R 10, between described triode Q1 and the automatic shutdown circuitry of host circuit, be connected with the R7 that maintains electric current is provided.
Above-mentionedly also comprise auxiliary shutdown circuit, described auxiliary shutdown circuit comprises triode Q3, and the base stage of described triode Q3 is in series with resistance R 11 and capacitor C 4, is connected with the resistance R 13 and the resistance R 12 that are used to capacitor C 4 chargings between host circuit and capacitor C 4.
Between the emitter of above-mentioned triode Q2 and host circuit, be connected with diode D5, diode D5 is for providing afterflow at host work aft engine circuit to triode Q2, bidirectional triode thyristor QK.
The invention has the beneficial effects as follows: when electrical work is complete or supply voltage can disconnect host power supply during higher than rated value automatically to reduce power consumption protected host circuit.During standby, power consumption is less than 0.01 watt, and overvoltage protection can reach 400 volts.Stand-by circuit can be used for multiple not with the household electrical appliance of remote control if washing machine, electromagnetic oven, desktop computer, microwave oven etc. are to reduce standby power consumption, to have improved standby reliability.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is done to further detailed description:
A kind of household electrical appliance stand-by circuit of the present invention, comprises control circuit, power circuit and overvoltage crowbar; Overvoltage crowbar comprises the protection branch road being connected in parallel on power supply, and a protection route capacitor C 1, light-emitting diode D2, diode D1, resistance R 2 and resistance R 1 are composed in series, and capacitor C 1 is parallel with resistance R 3; Power circuit comprises the power supply branch road being connected in parallel on power supply, and a power supply route diode D3, capacitor C 2 and resistance R 4 are composed in series, and diode D3 is parallel with the series arm being comprised of diode D4 and capacitor C 3; Control circuit comprises triode Q1, triode Q2 and bidirectional triode thyristor QK, and the base stage of triode Q1 is connected with the series arm being comprised of resistance R 8, linked switch SA, resistance R 6 and capacitor C 3, between the base stage of triode Q1 and capacitor C 1, is connected with resistance R 5; Between the base stage of the collector electrode of triode Q1 and triode Q2, be connected with resistance R 9, between the control utmost point of the collector electrode of triode Q2 and bidirectional triode thyristor QK, be connected with resistance R 10, between triode Q1 and the automatic shutdown circuitry of host circuit, be connected with the R7 that maintains electric current is provided.Between the emitter of triode Q2 and host circuit, be connected with diode D5, diode D5 is for providing afterflow at host work aft engine circuit to triode Q2, bidirectional triode thyristor QK.
Also comprise auxiliary shutdown circuit, described auxiliary shutdown circuit comprises triode Q3, and the base stage of described triode Q3 is in series with resistance R 11 and capacitor C 4, is connected with the resistance R 13 and the resistance R 12 that are used to capacitor C 4 chargings between host circuit and capacitor C 4.
Its main improvement is: 1, by connection, change host power supply circuit into disconnection, and the control circuit being comprised of triode Q1, Q2, resistance R 6, R7, R8, R9, R10, bidirectional triode thyristor QK is controlled.No longer power consumption of host circuit during standby.The power circuit being comprised of capacitor C 2, C3, resistance R 4, diode D3, D4 while 2, starting shooting provides starting current to connect host circuit power supply to control circuit, after host circuit work, by host circuit, by diode D5, to control circuit, provides afterflow.3, by resistance R 11, R12, R13, capacitor C 4, triode Q3, form auxiliary shutdown circuit.3, the overvoltage crowbar being comprised of resistance R 1, R2, R3, R5, capacitor C 1, diode D1, light-emitting diode D2 during higher than rated value when supply voltage makes control circuit disconnect host circuit power supply, simultaneously D2 luminous prompting.
This stand-by circuit is made to sample, and actual measurement power consumption is less than 0.01 watt; And carry out 400 volts of tests in 24 hours without abnormal.During for microwave oven, utilize the fire door linked switch short time to power circuit charging, no longer power consumption during standby.
Circuit working principle: 1, switch on power after power supply by resistance R 4, capacitor C 2, diode D3, D4, to C3, charge, its electric current is slightly larger than the leakage current of D3, C3.Triode Q1 base stage is zero potential, Q1, Q2, bidirectional triode thyristor QK cut-off, and host power supply power-off, complete machine is in holding state.
While 2, starting shooting, press on & off switch SA, C3 provides exciting current by R6, SA, R8 to Q1, and Q1 conducting also provides exciting current to make Q2 conducting by R9 to Q2, and Q2 is provided trigger current to make QK conducting and connects host circuit power supply, host work to QK by R10.
3, host work aft engine circuit provides afterflow by D5 to Q2, QK; Host circuit automatic shutdown circuitry output high potential is also provided and maintains electric current to Q1 by R7.
4, host circuit charges to C4 by R12, R13, and C4 provides exciting current by R11 to Q3 and makes Q3 conducting after being charged to rated voltage, does auxiliary shutdown and prepares.
5, when shutdown press SA, and R8 upper end is by SA by the Q3 ground connection of conducting, and Q1 base stage becomes zero potential cut-off, and Q2, QK end simultaneously and disconnect host circuit power supply and realize and shutting down.Circuit is got back to holding state.As not according to SA, main frame automatic shutdown circuitry output zero potential also can realize shutdown.
6, when supply voltage is during higher than rated value; piezo-resistance resistance is diminished by infinity; power supply charges to C1 by R1, R2, D1, D2, and C1 provides negative potential that Q1 is ended by R5 to Q1 base stage, and Q2, QK end simultaneously and disconnect host circuit power supply with protected host.While light-emitting diode D2 luminescence display.
The above is only the preferred implementation of this patent; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the art of this patent principle; can also make some improvement and replacement, these improvement and replacement also should be considered as the protection range of this patent.
Claims (3)
1. a household electrical appliance stand-by circuit, is characterized in that: comprise control circuit, power circuit and overvoltage crowbar;
Described overvoltage crowbar comprises the protection branch road being connected in parallel on power supply, and described protection is propped up route capacitor C 1, light-emitting diode D2, diode D1, resistance R 2 and resistance R 1 and is composed in series, and capacitor C 1 is parallel with resistance R 3;
Described power circuit comprises the power supply branch road being connected in parallel on power supply, and described power supply is propped up route diode D3, capacitor C 2 and resistance R 4 and is composed in series, and diode D3 is parallel with the series arm being comprised of diode D4 and capacitor C 3;
Described control circuit comprises triode Q1, triode Q2 and bidirectional triode thyristor QK, the base stage of triode Q1 is connected with the series arm being comprised of resistance R 8, linked switch SA, resistance R 6 and capacitor C 3, between the base stage of triode Q1 and capacitor C 1, is connected with resistance R 5; Between the base stage of the collector electrode of triode Q1 and triode Q2, be connected with resistance R 9, between the control utmost point of the collector electrode of triode Q2 and bidirectional triode thyristor QK, be connected with resistance R 10, between described triode Q1 and the automatic shutdown circuitry of host circuit, be connected with the R7 that maintains electric current is provided.
2. household electrical appliance stand-by circuit according to claim 1, it is characterized in that: also comprise auxiliary shutdown circuit, described auxiliary shutdown circuit comprises triode Q3, the base stage of described triode Q3 is in series with resistance R 11 and capacitor C 4, is connected with the resistance R 13 and the resistance R 12 that are used to capacitor C 4 chargings between host circuit and capacitor C 4.
3. household electrical appliance stand-by circuit according to claim 1, it is characterized in that: between the emitter of described triode Q2 and host circuit, be connected with diode D5, diode D5 is for providing afterflow at host work aft engine circuit to triode Q2, bidirectional triode thyristor QK.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410287871.6A CN104038189B (en) | 2014-06-25 | 2014-06-25 | Household electrical appliance stand-by circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410287871.6A CN104038189B (en) | 2014-06-25 | 2014-06-25 | Household electrical appliance stand-by circuit |
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| CN104038189A true CN104038189A (en) | 2014-09-10 |
| CN104038189B CN104038189B (en) | 2017-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410287871.6A Active CN104038189B (en) | 2014-06-25 | 2014-06-25 | Household electrical appliance stand-by circuit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2814754Y (en) * | 2005-06-27 | 2006-09-06 | 刘文钊 | Power off-overvoltage protector |
| CN201489444U (en) * | 2009-04-30 | 2010-05-26 | 庄祖吉 | Multifunctional computer stand-by automatic power-off energy saving device |
| CN101729832A (en) * | 2009-12-16 | 2010-06-09 | 广东朝野科技有限公司 | Television standby method with low power consumption and standby auxiliary circuit |
| KR101054990B1 (en) * | 2010-05-28 | 2011-08-05 | 엘지이노텍 주식회사 | Stand-by power circuit in a power supply for a led television |
| CN203367975U (en) * | 2013-08-08 | 2013-12-25 | 兰如根 | Standby electricity-saving device of overvoltage protection |
-
2014
- 2014-06-25 CN CN201410287871.6A patent/CN104038189B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2814754Y (en) * | 2005-06-27 | 2006-09-06 | 刘文钊 | Power off-overvoltage protector |
| CN201489444U (en) * | 2009-04-30 | 2010-05-26 | 庄祖吉 | Multifunctional computer stand-by automatic power-off energy saving device |
| CN101729832A (en) * | 2009-12-16 | 2010-06-09 | 广东朝野科技有限公司 | Television standby method with low power consumption and standby auxiliary circuit |
| KR101054990B1 (en) * | 2010-05-28 | 2011-08-05 | 엘지이노텍 주식회사 | Stand-by power circuit in a power supply for a led television |
| CN203367975U (en) * | 2013-08-08 | 2013-12-25 | 兰如根 | Standby electricity-saving device of overvoltage protection |
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| Publication number | Publication date |
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| CN104038189B (en) | 2017-08-25 |
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Effective date of registration: 20181112 Address after: 276017 Linyi Applied Science City C902, Linyi High-tech Zone, Shandong Province Patentee after: Linyi Wen Yi no intellectual property operation Co., Ltd. Address before: 250000 Qianshan Bonsai Garden, Taoran Road, Lanshan District, Linyi City, Shandong Province Patentee before: Li Changxi |
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Effective date of registration: 20201210 Address after: 276017 Shandong Linyi high tech Zone, double moon road science and Technology Pioneer Park A321 Patentee after: LINYI HIGH-TECH ZONE JINDI TECHNOLOGY INFORMATION SERVICE CENTER Address before: 276017 Linyi Applied Science City C902, Linyi High-tech Zone, Shandong Province Patentee before: LINYI WENYINUO INTELLECTUAL PROPERTY MANAGEMENT Co.,Ltd. |