CN201589141U - Refrigerator large-power LED illuminating device - Google Patents
Refrigerator large-power LED illuminating device Download PDFInfo
- Publication number
- CN201589141U CN201589141U CN2009202629027U CN200920262902U CN201589141U CN 201589141 U CN201589141 U CN 201589141U CN 2009202629027 U CN2009202629027 U CN 2009202629027U CN 200920262902 U CN200920262902 U CN 200920262902U CN 201589141 U CN201589141 U CN 201589141U
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- power led
- constant current
- refrigerator
- great power
- illuminating device
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Abstract
The utility model discloses a refrigerator large-power LED illuminating device, which comprises a current-limiting protection element, a rectifying filter circuit, a high-voltage constant-current driving circuit and a large-power LED light-emitting unit which are sequentially connected. The large-power LED light-emitting unit includes a circuit board and a large-power LED light-emitting diode with 1W or more than 1W power, the large-power LED light-emitting diode is arranged on the circuit board, and the current-limiting protection element is connected to a power supply. The refrigerator large-power LED illuminating device not only enables illumination intensity inside a refrigerator to be more even, leads luminous flux to be larger and eliminates light spots and shadow areas, but also has low power supply cost, reliable performance and easy manufacture and expansion.
Description
Technical field
The utility model relates to the technical field of refrigerator in the household electrical appliance, relates to the improvement of lighting apparatus for refrigerator, is a kind of refrigerator high-power LED illuminating device specifically.
Background technology
The LED light emitting diode has advantages such as luminous efficiency height, life-span length, energy-conserving and environment-protective, making it replace traditional incandescent lamp gradually in refrigerator illumination is more and more paid attention to and is used, there are shortcomings such as luminous flux is little, light is too concentrated in the high-brightness LED light emitting diode that refrigerator illumination is now adopted, easily cause hot spot and shadow district, illuminating effect is not good, influences attractive in appearance.And the great power LED light emitting diode that has overcome above-mentioned shortcoming needs to use DC power supply because of operating current being required harshness, and the power supply cost height is very limited it in the refrigerator illumination.
The utility model content
At the shortcoming of prior art, the purpose of this utility model provides that a kind of power supply cost is low, the refrigerator high-power LED illuminating device of dependable performance.
For achieving the above object; the technical solution of the utility model is: a kind of refrigerator high-power LED illuminating device; it comprises current-limiting protection element, current rectifying and wave filtering circuit, high voltage and constant current drive circuit and the great power LED luminescence unit composition that connects successively; described great power LED luminescence unit comprises circuit board and is located at great power LED light emitting diode on the circuit board that described current-limiting protection element is connected to power supply.
Described great power LED luminescence unit also comprises the dispersing lens that is sleeved on the great power LED light emitting diode, and dispersing lens is fixed on the circuit board by viscose glue.
Described current rectifying and wave filtering circuit is made up of rectifying device and filtering device; two ends L, the N of power supply is connected to the input of rectifying device by the current-limiting protection element; the output of rectifying device is connected to the input of filtering device, and the output of filtering device is connected to the high voltage and constant current drive circuit.
Described rectifying device is all-wave or bridge rectifier, and filtering device is LC wave filter or π type LC wave filter.
Described high voltage and constant current drive circuit comprises the constant current control chip, inductance L, insulated type FET Q and feedback resistance Rf, the Vin of constant current control chip, the output that GND end connects filtering device respectively just, negative terminal, the Vin end of constant current control chip is successively through the great power LED light emitting diode, inductance L is connected to the drain electrode end of insulated type FET Q, the source terminal of insulated type FET Q is through a feedback resistance Rf ground connection or a direct current power cathode, the gate terminal of insulated type FET Q connects the Gate end of constant current control chip, and the feedback signal on the feedback resistance Rf connects the Cs end of constant current control chip.
Described high voltage and constant current drive circuit also comprises diode D, and its anode connects the drain electrode end of insulated type FET Q, and negative electrode connects the Vin end of constant current control chip.
Described great power LED luminescence unit has many groups, and every group of great power LED luminescence unit comprises 1～20 great power LED light emitting diode, and the group number of great power LED luminescence unit is corresponding with the number of high voltage and constant current drive circuit.
Compared with prior art, the utlity model has following advantage: the utility model can make that illuminance is more even in the refrigerator, luminous flux is bigger, eliminate hot spot and shadow district, and power supply cost is low, and dependable performance is easy to make and expand.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is the scheme of installation of great power LED light emitting diode, dispersing lens and circuit board.
Each label is among the figure: 1. rectifying device; 2. filtering device; 3. dispersing lens; 4. viscose glue; 5. circuit board; FUSE. current-limiting protection element; LED. great power LED light emitting diode; HV9910. constant current control chip; L. inductance; D. fast diode; Q. insulated type FET; Rf. feedback resistance.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
Referring to Fig. 1, the utility model adopts the great power LED light emitting diode to throw light on to refrigerator as light-emitting component, because the rated operational voltage of great power LED light emitting diode is about direct current 3.3V, operating current 350mA or more than, and the refrigerator use is the alternating current 220V civil power, therefore need the alternating current 220V civil power to be converted into 200V left and right sides direct current by current rectifying and wave filtering circuit, the direct current that obtains to finish the coupling to the voltage and current of great power LED light emitting diode, is lighted the great power LED light emitting diode through the break-make of constant current control chip HV9910 control insulated type FET.After constant current control chip HV9910 handles, the load current of great power LED light emitting diode can both be controlled on the default levels of current as the dc source voltage of reference voltage and the voltage feedback signal on the feedback resistance under the influence of various factors.The passage that fast diode D discharges as inductance L storage power when the insulated type FET disconnects is with protection great power LED light emitting diode.
Referring to Fig. 2, the great power LED light emitting diode is installed in the dispersing lens, and dispersing lens is made with transparent material such as plastics or glass, is fixed on the circuit board by viscose glue, so that light is more even.
Claims (7)
1. refrigerator high-power LED illuminating device; it is characterized in that: comprise the current-limiting protection element, current rectifying and wave filtering circuit, high voltage and constant current drive circuit and the great power LED luminescence unit composition that connect successively; described great power LED luminescence unit comprises circuit board and is located at great power LED light emitting diode on the circuit board that described current-limiting protection element is connected to power supply.
2. refrigerator high-power LED illuminating device according to claim 1 is characterized in that: described great power LED luminescence unit also comprises the dispersing lens that is sleeved on the great power LED light emitting diode, and dispersing lens is fixed on the circuit board by viscose glue.
3. refrigerator high-power LED illuminating device according to claim 1 and 2; it is characterized in that: described current rectifying and wave filtering circuit is made up of rectifying device (1) and filtering device (2); two ends L, the N of power supply is connected to the input of rectifying device (1) by the current-limiting protection element; the output of rectifying device (1) is connected to the input of filtering device (2), and the output of filtering device (2) is connected to the high voltage and constant current drive circuit.
4. refrigerator high-power LED illuminating device according to claim 3 is characterized in that: described rectifying device (1) is all-wave or bridge rectifier, and filtering device (2) is LC wave filter or π type LC wave filter.
5. refrigerator high-power LED illuminating device according to claim 1 and 2, it is characterized in that: described high voltage and constant current drive circuit comprises the constant current control chip, inductance L, insulated type FET Q and feedback resistance Rf, the Vin of constant current control chip, the output that GND end connects filtering device (2) respectively just, negative terminal, the Vin end of constant current control chip is successively through the great power LED light emitting diode, inductance L is connected to the drain electrode end of insulated type FET Q, the source terminal of insulated type FET Q is through a feedback resistance Rf ground connection or a direct current power cathode, the gate terminal of insulated type FET Q connects the Gate end of constant current control chip, and the feedback signal on the feedback resistance Rf connects the Cs end of constant current control chip.
6. refrigerator high-power LED illuminating device according to claim 5 is characterized in that: described high voltage and constant current drive circuit also comprises diode D, and its anode connects the drain electrode end of insulated type FET Q, and negative electrode connects the Vin end of constant current control chip.
7. refrigerator high-power LED illuminating device according to claim 5, it is characterized in that: described great power LED luminescence unit has many groups, every group of great power LED luminescence unit comprises 1～20 great power LED light emitting diode, and the group number of great power LED luminescence unit is corresponding with the number of high voltage and constant current drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202629027U CN201589141U (en) | 2009-11-17 | 2009-11-17 | Refrigerator large-power LED illuminating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202629027U CN201589141U (en) | 2009-11-17 | 2009-11-17 | Refrigerator large-power LED illuminating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201589141U true CN201589141U (en) | 2010-09-22 |
Family
ID=42748924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202629027U Expired - Lifetime CN201589141U (en) | 2009-11-17 | 2009-11-17 | Refrigerator large-power LED illuminating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201589141U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128401A (en) * | 2011-03-21 | 2011-07-20 | 萨威灯具设计制造(苏州)有限公司 | Easy-radiating high-power LED tube lamp |
-
2009
- 2009-11-17 CN CN2009202629027U patent/CN201589141U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128401A (en) * | 2011-03-21 | 2011-07-20 | 萨威灯具设计制造(苏州)有限公司 | Easy-radiating high-power LED tube lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100922 |
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| CX01 | Expiry of patent term |