CN202059627U

CN202059627U - Automatic LED (light-emitting diode) constant temperature circuit

Info

Publication number: CN202059627U
Application number: CN2011201042287U
Authority: CN
Inventors: 曾凡文; 卢先贵; 苏承勇
Original assignee: Chongqing Shalom Science & Technology Co Ltd
Current assignee: Chongqing Shalom Science & Technology Co Ltd
Priority date: 2011-04-12
Filing date: 2011-04-12
Publication date: 2011-11-30
Anticipated expiration: 2021-04-12

Abstract

The utility model discloses an automatic LED (light-emitting diode) constant temperature circuit and relates to an LED driving circuit. The LED constant temperature circuit comprises an LED driver and an LED module, wherein the LED module is connected with the LED driver in series; the LED driver adopts an LED constant current driver; and a temperature control system is arranged on the LED module and controls a power source output of the LED driver. In the automatic LED constant temperature circuit, a temperature sensitive resistor is used for inducing the temperature of the LED module, and a temperature relay is used for controlling output current and voltage, so that the temperature of the LED module is constant, the early (accelerated) failure due to large luminous decay caused by the overheating of an LED lamp is avoided, and the service life of the LED is prolonged.

Description

The LED automatic thermostat circuit

Technical field

The utility model relates to a kind of LED automatic thermostat circuit.

Background technology

Because power supply itself produces certain heat, make the origin of heat on the LED lamp increase gradually in use, simultaneously, power supply and the design of lamp one make the LED lamp integral body inequality of being heated, these factors all can cause light fixture generation fatigue and early failure, and influence the useful life of LED.

The utility model content

At above-mentioned the deficiencies in the prior art part, the utility model provides a kind of LED automatic thermostat circuit, has solved the problem that above-mentioned prior art exists effectively.

To achieve these goals, the technical solution adopted in the utility model is: a kind of LED automatic thermostat circuit, comprise led driver and LED module, led module is connected in series on the led driver, described led driver is the LED constant-flow driver, on led module, be provided with temperature control system, the power supply output of this temperature control system control led driver.

As preferably: described temperature control system includes thermo-sensitive resistor, temperature relay and adjustable resistor, this thermo-sensitive resistor and temperature relay series connection back are in parallel with adjustable resistor, be connected in series in then on the led driver, described thermo-sensitive resistor is installed on the led module with temperature relay and closely contacts with it.

Another program is: described led driver is a LED constant voltage driving device.

As preferably: described temperature control system comprises thermo-sensitive resistor and temperature relay, is connected in series on the led driver after its parallel connection, and described thermo-sensitive resistor is installed on the led module with temperature relay and closely contacts with it.

Compared with prior art, the beneficial effect of this utility model: the utility model is by the temperature sense of thermo-sensitive resistor to led module, and control output current voltage by temperature relay, make the temperature of led module reach constant, avoid the LED light fixture to lose efficacy, prolong the useful life of LED because of the big light decay of overheated generation causes (acceleration) in early days.

Description of drawings

Fig. 1 is the theory diagram of the utility model embodiment one;

Fig. 2 is the circuit diagram of Fig. 1;

Fig. 3 is the theory diagram of the utility model embodiment two;

Fig. 4 is the circuit diagram of Fig. 3.

Embodiment

The utility model is described in further detail below in conjunction with drawings and the specific embodiments.

Embodiment 1:

Referring to Fig. 1 and Fig. 2, this LED automatic thermostat circuit comprises led driver and LED module, led module is connected in series on the led driver, by led driver power supply led module, described led driver is the LED constant-flow driver, on led module, be provided with temperature control system, this temperature control system includes negative temperature coefficient thermo-sensitive resistor NTC, often open temperature relay Kt and adjustable resistor W1, this negative temperature coefficient thermo-sensitive resistor NTC and Chang Kai temperature relay Kt series connection back are in parallel with adjustable resistor W1, integral body is connected on the led driver then, described negative temperature coefficient thermo-sensitive resistor NTC is installed on the led module with Chang Kai temperature relay Kt and closely contacts with it, the power supply output of described temperature control system control led driver.

During use, the index of power supply is, the 220VAC input, and electric current 1.2A-1.7A is adjustable, voltage adaptive (36V-39V), the switch closure temperature of often opening temperature relay Kt is 56 ℃, the automatic disconnection temperature is 45 ℃.

Kt is in off-state at normal temperatures, and have only adjustable resistor W1 to work in the control circuit this moment, and setting normal temperature work total current constant is 1.6A; When the relay temperature rises to 56 ℃, the Kt auto-closing, whole temperature control system is started working, to reduce the output of constant-current supply; When temperature is reduced to 45 ℃, Kt automatic disconnection, the specified again output of power supply.

Except that above-mentioned, also can be by selecting high-quality LED module, the metal substrate that adopts high heat conduction, high heat radiation is evenly distributed heatsink temperature, thereby makes thermolysis perform to maximum as wick plate.Also can coat gluey heat-conducting silicone grease and increase real contact area, increase the area of dissipation of fin, with the malformation of fin, with convenient heat radiation at contact-making surface with higher capacity of heat transmission.

Embodiment 2:

Referring to Fig. 3 and Fig. 4, this LED automatic thermostat circuit comprises led driver and LED module, led module is connected in series on the led driver, by led driver power supply led module, described led driver is a LED constant voltage driving device, on led module, be provided with temperature control system, this temperature control system comprises positive temperature coefficient thermo-sensitive resistor PTC and normally closed temperature relay Kt, be connected in series on the led driver after its parallel connection, described positive temperature coefficient thermo-sensitive resistor PTC is installed in led module with normally closed temperature relay Kt and closely contacts with it, the power supply output of described temperature control system control led driver.

During use, the index of power supply is, the 220VAC input, and power output is 60W, and the break-off signal of normally closed temperature relay Kt is 60 ℃, and the auto-closing temperature is 48 ℃.

Kt is in closure state under the normal temperature, the specified output of Control Driver in the control circuit at this moment, and the specified total voltage of this LED module normal temperature work is 24V; Kt automatic disconnection when the relay temperature rises to 60 ℃, The whole control circuit working, thereby the output of minimizing constant voltage source, when temperature was reduced to 48 ℃, the temperature relay auto-closing was normally exported power supply.

The above only is the detailed description of the utility model preferred embodiment and graphic, is not to be used for limiting the utility model, and the embodiment or the approximate construction of all similar variations of doing according to creation spirit of the present utility model all should be contained among the utility model.

Claims

1. LED automatic thermostat circuit, comprise led driver and LED module, led module is connected in series on the led driver, it is characterized in that: described led driver is the LED constant-flow driver, on led module, be provided with temperature control system, the power supply output of this temperature control system control led driver.

2. LED automatic thermostat circuit according to claim 1, it is characterized in that: described temperature control system includes thermo-sensitive resistor, temperature relay and adjustable resistor, this thermo-sensitive resistor and temperature relay series connection back are in parallel with adjustable resistor, be connected in series in then on the led driver, described thermo-sensitive resistor is installed on the led module with temperature relay and closely contacts with it.

3. LED automatic thermostat circuit according to claim 1 is characterized in that: described led driver is a LED constant voltage driving device.

4. LED automatic thermostat circuit according to claim 3, it is characterized in that: described temperature control system comprises thermo-sensitive resistor and temperature relay, be connected in series on the led driver after its parallel connection, described thermo-sensitive resistor is installed on the led module with temperature relay and closely contacts with it.