CN202032520U - Light-emitting diode (LED) lighting lamp circuit for refrigerator - Google Patents
Light-emitting diode (LED) lighting lamp circuit for refrigerator Download PDFInfo
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- CN202032520U CN202032520U CN201120105466XU CN201120105466U CN202032520U CN 202032520 U CN202032520 U CN 202032520U CN 201120105466X U CN201120105466X U CN 201120105466XU CN 201120105466 U CN201120105466 U CN 201120105466U CN 202032520 U CN202032520 U CN 202032520U
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Abstract
The utility model provides a light-emitting diode (LED) lighting lamp for a refrigerator. An external power source is connected with a resistance-capacitance buck circuit and a rectification filter circuit through a switch. The rectification filter circuit is connected with an LED lamp light circuit. The LED lamp light circuit is connected with a zener diode circuit in parallel. The zener diode circuit is connected with a current limit resistor in series. When network voltage and network frequency produce fluctuations, or a door switch K1 contact shakes caused by opening or closing the door quickly, or the door switch K1 contact is poor in contact, heavy current generated by overlaying the network voltage and residue voltage on a capacitance C1 passes through Z1 and a current limiting resistor R6. Because of the existence of the current limiting resistor R6, the phenomena of over-current breakdown of the zener diode Z1 or over-current burndown of a resistor R1 or R2 can be avoided.
Description
Technical field
The utility model relates to the lighting circuit technical field, concrete relates to a kind of LED lighting lamp circuit that is used in refrigerator inside.
Background technology
Existing conventional refrigerator LED illuminating lamp, see accompanying drawing 1, K1 is a door switch in the circuit, and R1, R3 are current-limiting resistances, and C1 is a decompression capacitor, R2 is the discharge resistance of C1, D1, D2, D3, D4 are commutation diodes, and Z1 is a Zener diode, and C2 is a filter capacitor, LED1, LED2, LED3, LED4 are light emitting diode, and R4, R5 are the light emitting diode current-limiting resistance.The external line voltage 220V of circuit alternating current, power supply is provided for the LED light emitting diode after the voltage stabilizing of general employing resistance-capacitance depressurization process rectifying and wave-filtering, yet sort circuit is in the middle of reality is used, line voltage and mains frequency all have fluctuation, when the high-speed switch door causes door switch K1 contact that shake or the loose contact of door switch K1 contact own take place, the phenomenon that residual voltage on the C1 electric capacity and line voltage stack cause puncture of Zener diode Z1 overcurrent or resistance R 1 or R2 overcurrent to be burnt.
Summary of the invention
Technical problem to be solved in the utility model is, overcomes problems of the prior art, provides a kind of follow-on refrigerator with LED illuminating lamp resistance-capacitance depressurization circuit, improves circuit reliability under the few situation of increase cost.
In order to address the above problem the technical solution of the utility model is such:
A kind of refrigerator LED lighting lamp circuit, external power supply connects a resistance-capacitance depressurization circuit and a current rectifying and wave filtering circuit by a switch, current rectifying and wave filtering circuit connects LED lamp illuminating circuit, and LED lamp illuminating circuit is parallel with a diode circuit of voltage regulation, and this diode circuit of voltage regulation is in series with a current-limiting resistance.
The current-limiting resistance impedance ranges is 100 Ω ~ 1000 Ω.
Owing to adopted technique scheme, when line voltage and mains frequency generation fluctuation, perhaps the high-speed switch door causes door switch K1 contact to be shaken, the perhaps loose contact of door switch K1 contact own, the big electric current that residual voltage on the C1 electric capacity and line voltage stack produce will pass through Z1 and current-limiting resistance R6, because the existence of current-limiting resistance R6, so the phenomenon that can avoid puncture of Zener diode Z1 overcurrent or resistance R 1 or R2 overcurrent to burn.
Description of drawings
Fig. 1 is a LED lighting circuit schematic diagram in the prior art.
Fig. 2 is a LED lighting circuit schematic diagram described in the utility model.
The specific embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 2, K1 is a door switch in the circuit, R1, R3 are current-limiting resistances, and C1 is a decompression capacitor, and R2 is the discharge resistance of C1, D1, D2, D3, D4 are commutation diodes, Z1 is a Zener diode, and C2 is a filter capacitor, and LED1, LED2, LED3, LED4 are light emitting diode, R4, R5 are the light emitting diode current-limiting resistance, increase current-limiting resistance R6 on Zener diode Z1 branch road.R6 resistive impedance scope is 100 Ω ~ 1000 Ω.Door switch K1 inserts in the 220V circuit, door switch K1 be connected in series resistance R 1, R2, resistance R 2 decompression capacitor C1 in parallel, the circuit rectification circuit that is connected in series and constitutes afterwards by commutation diode D1, D2, D3, D4, rectification circuit series resistance R3, connect in circuit of LED LED1, LED2, LED3, LED4, filter capacitor C2 is connected in parallel on the diode circuit two ends again.Zener diode Z1 and the current-limiting resistance R6 series connection back diode circuit two ends of inserting in parallel.LED 1, LED2 connect with resistance R 4, and LED 3, LED4 connect with resistance R 5.
When line voltage and mains frequency generation fluctuation, perhaps the high-speed switch door causes door switch K1 contact to be shaken, the perhaps loose contact of door switch K1 contact own, the big electric current that residual voltage on the C1 electric capacity and line voltage stack produce will pass through Z1 and current-limiting resistance R6, because the existence of current-limiting resistance R6, so the phenomenon that can avoid puncture of Zener diode Z1 overcurrent or resistance R 1 or R2 overcurrent to burn.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. refrigerator LED lighting lamp circuit, external power supply connects a resistance-capacitance depressurization circuit and a current rectifying and wave filtering circuit by a switch, current rectifying and wave filtering circuit connects LED lamp illuminating circuit, LED lamp illuminating circuit is parallel with a diode circuit of voltage regulation, it is characterized in that this diode circuit of voltage regulation is in series with a current-limiting resistance.
2. a kind of refrigerator LED lighting lamp circuit according to claim 1 is characterized in that, the current-limiting resistance impedance ranges is 100 Ω ~ 1000 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120105466XU CN202032520U (en) | 2011-04-12 | 2011-04-12 | Light-emitting diode (LED) lighting lamp circuit for refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120105466XU CN202032520U (en) | 2011-04-12 | 2011-04-12 | Light-emitting diode (LED) lighting lamp circuit for refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202032520U true CN202032520U (en) | 2011-11-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120105466XU Expired - Fee Related CN202032520U (en) | 2011-04-12 | 2011-04-12 | Light-emitting diode (LED) lighting lamp circuit for refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202032520U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102695338A (en) * | 2012-05-23 | 2012-09-26 | 安徽中晨光电科技有限公司 | Drive power supply for 3-wattage LED (light-emitting diode) lamp |
| CN103227573A (en) * | 2013-05-06 | 2013-07-31 | 陈军 | Alternating-current voltage reduction micro-current supply circuit |
| CN104838725A (en) * | 2012-12-06 | 2015-08-12 | 赤多尼科两合股份有限公司 | Operating device for illuminant |
-
2011
- 2011-04-12 CN CN201120105466XU patent/CN202032520U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102695338A (en) * | 2012-05-23 | 2012-09-26 | 安徽中晨光电科技有限公司 | Drive power supply for 3-wattage LED (light-emitting diode) lamp |
| CN104838725A (en) * | 2012-12-06 | 2015-08-12 | 赤多尼科两合股份有限公司 | Operating device for illuminant |
| CN103227573A (en) * | 2013-05-06 | 2013-07-31 | 陈军 | Alternating-current voltage reduction micro-current supply circuit |
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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: 20111109 Termination date: 20130412 |