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LED (light-emitting diode) lamp circuit for refrigerator

A technology of LED lamps and refrigerators, applied in the direction of electric lamp circuit layout, application, electric light source, etc., can solve the problems of device damage and cost increase, and achieve the effect of cost saving and simple operation

Inactive Publication Date: 2013-03-06
HISENSE(SHANDONG)REFRIGERATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This in turn leads to an increase in cost, and the more devices there are, the greater the chance of device damage

Method used

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  • LED (light-emitting diode) lamp circuit for refrigerator

Examples

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Embodiment 1

[0014] Such as figure 1 As shown, the LED lighting circuit for refrigerators of the present invention includes a step-down circuit 1 , a rectifier circuit 2 and a load circuit 3 . Wherein, the step-down circuit 1 is provided with an electric heating wire R for stepping down the mains power. The step-down circuit 1 is connected to the rectifier circuit 2, the rectifier circuit 2 is composed of four rectifier diodes (VD1-VD4), and the rectifier circuit 2 is connected to the load circuit 3, and the load circuit 3 is provided with LED lights (LED1-LED4), filter capacitors C1 and shunt resistor R1.

[0015] As an improvement plan, reverse voltage regulator diodes (VD5-VD8) are installed inside the LED lamp, so that in the case of one LED lamp being damaged, the normal operation of other LED lamps can be guaranteed.

[0016] As an improved solution, the load circuit is provided with a shunt resistor R1.

[0017] When working, the mains 220v voltage is connected to the circuit, an...

Embodiment 2

[0021] Compared with the first embodiment, the difference of this embodiment is that a Zener diode is arranged in the load circuit 3 instead of the shunt resistor R1, and this solution can also play a better role in adjusting the current and voltage.

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PUM

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Abstract

The invention relates to an LED (light-emitting diode) lamp circuit for a refrigerator, and in particular relates to an LED lamp illuminating circuit arranged in the refrigerator. The LED lamp illuminating circuit for the refrigerator comprises a voltage reduction circuit, a rectifying circuit and a load circuit; the load circuit is provided with a filtering circuit, a shunt resistor and LED lamps; the voltage reduction circuit is connected with the rectifying circuit; the rectifying circuit is connected with the load circuit; a voltage reduction element in the voltage reduction circuit is an electric heating wire arranged on the refrigerator; the electric heating wire arranged on the refrigerator is adopted for reducing the voltage of the LED lamp circuit, a capacitor and resistor voltage reduction device is not required to be arranged on the circuit, cost is saved, and the operation is simple; and meanwhile, the LED lamp is internally provided with a reverse voltage stabilizing diode, so that under the condition that a plurality of LED lamps are arranged, if one LED lamp breaks down, other LED lamps can still operate normally.

Description

[0001] technical field [0002] The invention relates to an LED lamp circuit for lighting, in particular to an LED lamp circuit arranged inside a refrigerator. Background technique [0003] In the field of refrigerators, the lighting facilities used incandescent lighting in the early stage, which had the disadvantages of high power consumption (10-15W), low luminous efficiency, short life (1000h), and large space occupation. About 5 to 6 years ago, LED lighting began to be applied to refrigerators, and the resistance-capacitance step-down method was used to reduce the ~220V mains power to more than ten volts, driving 4-8 lamp beads to emit light, and the power consumption was less than 2W, but In practical applications, due to the resistance-capacitance step-down, it is susceptible to interference from the power grid and the work of the refrigerator, etc., which may easily cause damage to the capacitor in the resistance-capacity step-down circuit, damage to the LED lamp bead...

Claims

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Application Information

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IPC IPC(8): H05B37/02F25D27/00
Inventor 卢玉波朱建高
Owner HISENSE(SHANDONG)REFRIGERATOR CO LTD