CN207926483U - A kind of television set fan energy-saving circuit - Google Patents
A kind of television set fan energy-saving circuit Download PDFInfo
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- CN207926483U CN207926483U CN201820374878.5U CN201820374878U CN207926483U CN 207926483 U CN207926483 U CN 207926483U CN 201820374878 U CN201820374878 U CN 201820374878U CN 207926483 U CN207926483 U CN 207926483U
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- 238000012544 monitoring process Methods 0.000 abstract 1
- 230000017525 heat dissipation Effects 0.000 description 2
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- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
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Abstract
Description
技术领域technical field
本实用新型涉及一种电动机控制装置，属于电气自动化领域。The utility model relates to a motor control device, which belongs to the field of electric automation.
背景技术Background technique
电视机内部布置数量众多的电子器件，这些器件在长时间工作，流过的电流引起器件发热，积蓄了过高的热量会导致器件的绝缘强度降低，电气设备发生故障。一般电视机的盒体都是密闭的，一般情况下采用在其盒内安装排风扇的方式来增加其内部空气流通，让电视机内部的电气元件有效散热。排风扇的主要作用是保持电视机的盒内的温度正常，能有效的提高产品运行的安全性和稳定性。但现有的散热方式是：不论盒内温度是否超标，风扇都一直处于不间断工作状态，这样风扇容易过负荷而损坏，一旦排风扇损坏，虽然不会导致总电流过高，但会使盒内温度升高，影响电气元件的使用，影响电视机的使用寿命。A large number of electronic devices are arranged inside the TV. These devices work for a long time, and the current flowing through them will cause the devices to heat up. Excessive heat accumulation will reduce the insulation strength of the devices and cause electrical equipment to malfunction. Generally, the box body of a TV is airtight. Generally, an exhaust fan is installed in the box to increase the internal air circulation, so that the electrical components inside the TV can effectively dissipate heat. The main function of the exhaust fan is to keep the temperature inside the TV box normal, which can effectively improve the safety and stability of product operation. However, the existing heat dissipation method is: no matter whether the temperature inside the box exceeds the standard, the fan is always in an uninterrupted working state, so that the fan is easily overloaded and damaged. Once the exhaust fan is damaged, although the total current will not be too high, it will make the inside of the box The temperature rise will affect the use of electrical components and affect the service life of the TV.
发明内容Contents of the invention
本实用新型目的是为了解决现有电视机散热方案影响电视机使用寿命的问题，提供了一种电视机风扇节能电路。The purpose of the utility model is to provide an energy-saving circuit for a TV fan to solve the problem that the existing TV heat dissipation scheme affects the service life of the TV.
本实用新型所述一种电视机风扇节能电路，它包括变压器T、整流桥、直流继电器KM1、热敏电阻R1、电阻R2、电阻R3、电阻R4、运算放大器A、三极管Q和直流电动机M；An energy-saving circuit for a TV fan according to the utility model, which includes a transformer T, a rectifier bridge, a DC relay KM1, a thermistor R1, a resistor R2, a resistor R3, a resistor R4, an operational amplifier A, a triode Q and a DC motor M;
变压器T的原边线圈连接220V交流电源，且在该支路上串联有直流继电器KM1的常闭触点；The primary coil of transformer T is connected to 220V AC power supply, and the normally closed contact of DC relay KM1 is connected in series on this branch;
变压器T的副边线圈连接整流桥的交流输入端；整流桥的正极输出端连接热敏电阻R1的一端，热敏电阻R1的另一端同时连接直流电动机M的正极供电端子和运算放大器A的同相输入端；整流桥的负极输出端连接直流电动机M的负极供电端子；The secondary coil of the transformer T is connected to the AC input terminal of the rectifier bridge; the positive output terminal of the rectifier bridge is connected to one end of the thermistor R1, and the other end of the thermistor R1 is connected to the positive power supply terminal of the DC motor M and the same phase of the operational amplifier A The input terminal; the negative output terminal of the rectifier bridge is connected to the negative power supply terminal of the DC motor M;
运算放大器A的反相输入端同时连接电阻R2的一端和电阻R3的一端；The inverting input terminal of the operational amplifier A is connected to one end of the resistor R2 and one end of the resistor R3 at the same time;
运算放大器A的输出端同时连接电阻R3的另一端和三极管Q的基极；The output end of the operational amplifier A is simultaneously connected to the other end of the resistor R3 and the base of the transistor Q;
运算放大器A的正极供电端子同时连接电源VCC和直流继电器KM1线圈的一端；The positive power supply terminal of the operational amplifier A is connected to the power supply VCC and one end of the coil of the DC relay KM1 at the same time;
运算放大器A的负极供电端子接地；The negative power supply terminal of operational amplifier A is grounded;
三极管Q的发射极连接电阻R4的一端；电阻R4的另一端和电阻R2的另一端同时接地；The emitter of the transistor Q is connected to one end of the resistor R4; the other end of the resistor R4 and the other end of the resistor R2 are simultaneously grounded;
三极管Q的集电极连接直流继电器KM1线圈的另一端。The collector of the transistor Q is connected to the other end of the coil of the DC relay KM1.
优选地，整流桥由二极管D1、二极管D2、二极管D3和二极管D4构成。Preferably, the rectifier bridge is composed of diode D1, diode D2, diode D3 and diode D4.
优选地，还包括声音报警单元，所述声音报警单元采用蜂鸣器LS来完成，蜂鸣器LS串联在三极管Q的集电极与直流继电器KM1之间。Preferably, a sound alarm unit is also included, and the sound alarm unit is completed by a buzzer LS, and the buzzer LS is connected in series between the collector of the transistor Q and the DC relay KM1.
优选地，还包括光报警单元，所述光报警单元由灯泡L1来完成，灯泡L1串联在三极管Q的集电极与直流继电器KM1之间。Preferably, a light alarm unit is also included, and the light alarm unit is completed by a light bulb L1, which is connected in series between the collector of the triode Q and the DC relay KM1.
本实用新型的有益效果：本实用新型所述电视机风扇节能电路将热敏电阻和电动机串联，根据电视机内部温度的变化，电动机的转速跟着变化，如果电视机温度过高还会自动切断电源，进行声光报警，这样即节能又安全。Beneficial effects of the utility model: The energy-saving circuit of the TV fan in the utility model connects the thermistor and the motor in series, and the motor speed changes accordingly according to the change of the internal temperature of the TV. If the temperature of the TV is too high, the power supply will be cut off automatically , sound and light alarm, which is energy-saving and safe.
附图说明Description of drawings
图1是本实用新型所述一种电视机风扇节能电路的电路原理图。Fig. 1 is a circuit schematic diagram of an energy-saving circuit for a TV fan according to the utility model.
具体实施方式Detailed ways
具体实施方式一：本实施方式所述一种电视机风扇节能电路，其特征在于，它包括变压器T、整流桥、直流继电器KM1、热敏电阻R1、电阻R2、电阻R3、电阻R4、运算放大器A、三极管Q、直流电动机M、蜂鸣器LS和灯泡L1；Embodiment 1: An energy-saving circuit for a TV fan described in this embodiment is characterized in that it includes a transformer T, a rectifier bridge, a DC relay KM1, a thermistor R1, a resistor R2, a resistor R3, a resistor R4, and an operational amplifier. A. Transistor Q, DC motor M, buzzer LS and bulb L1;
变压器T的原边线圈连接220V交流电源，且在该支路上串联有直流继电器KM1的常闭触点；The primary coil of transformer T is connected to 220V AC power supply, and the normally closed contact of DC relay KM1 is connected in series on this branch;
变压器T的副边线圈连接整流桥的交流输入端；整流桥的正极输出端连接热敏电阻R1的一端，热敏电阻R1的另一端同时连接直流电动机M的正极供电端子和运算放大器A的同相输入端；整流桥的负极输出端连接直流电动机M的负极供电端子；The secondary coil of the transformer T is connected to the AC input terminal of the rectifier bridge; the positive output terminal of the rectifier bridge is connected to one end of the thermistor R1, and the other end of the thermistor R1 is connected to the positive power supply terminal of the DC motor M and the same phase of the operational amplifier A The input terminal; the negative output terminal of the rectifier bridge is connected to the negative power supply terminal of the DC motor M;
运算放大器A的反相输入端同时连接电阻R2的一端和电阻R3的一端；The inverting input terminal of the operational amplifier A is connected to one end of the resistor R2 and one end of the resistor R3 at the same time;
运算放大器A的输出端同时连接电阻R3的另一端和三极管Q的基极；The output end of the operational amplifier A is simultaneously connected to the other end of the resistor R3 and the base of the transistor Q;
运算放大器A的正极供电端子同时连接电源VCC和直流继电器KM1线圈的一端；The positive power supply terminal of the operational amplifier A is connected to the power supply VCC and one end of the coil of the DC relay KM1 at the same time;
运算放大器A的负极供电端子接地；The negative power supply terminal of operational amplifier A is grounded;
三极管Q的发射极连接电阻R4的一端；电阻R4的另一端和电阻R2的另一端同时接地；The emitter of the transistor Q is connected to one end of the resistor R4; the other end of the resistor R4 and the other end of the resistor R2 are simultaneously grounded;
三极管Q的集电极通过串联的蜂鸣器LS、灯泡L1和直流继电器KM1线圈连接电源VCC。The collector of the triode Q is connected to the power supply VCC through the serial connection of the buzzer LS, the bulb L1 and the coil of the DC relay KM1.
整流桥由二极管D1、二极管D2、二极管D3和二极管D4构成。The rectifier bridge is composed of diode D1, diode D2, diode D3 and diode D4.
工作原理：直流电动机M为风扇的电机，当电视机接通220V电源运行时，220V交流电经变压器T降压、整流桥输出直流，该直流给风扇及后续电路提供工作电源，风扇随之转动，由于此时温度低，热敏电阻R1阻值大，所以风扇转的比较慢(即M的转速慢)，当长时间看电视后，温度逐渐增加，热敏电阻R1阻值减小，风扇的转速加快，当温度变化时，热敏电阻R1和电动机M之间电压分配比例也在变化，如果温度过高会导致热敏电阻R1的压降变得很小，则输出至A的直流供电电压比较大，则运算放大器A输出高电压，驱动三极管Q导通，进而进行声光报警，并且直流继电器KM1线圈得电，直流继电器KM1常闭触电断开，切断电源，关闭电视机。可以通过控制电阻R2、电阻R3、电阻R4的阻值调节上限温度，这样在节约电能的同时，又保证了电视机的安全，延长使用寿命。Working principle: The DC motor M is the motor of the fan. When the TV is connected to the 220V power supply, the 220V AC is stepped down by the transformer T, and the rectifier bridge outputs DC. The DC provides working power for the fan and subsequent circuits, and the fan rotates accordingly. Because the temperature is low at this time, the resistance of thermistor R1 is large, so the fan rotates slowly (that is, the speed of M is slow). After watching TV for a long time, the temperature gradually increases, the resistance of thermistor R1 decreases, and the fan's As the speed increases, when the temperature changes, the voltage distribution ratio between the thermistor R1 and the motor M also changes. If the temperature is too high, the voltage drop of the thermistor R1 becomes very small, and the DC supply voltage output to A If it is relatively large, the operational amplifier A outputs a high voltage, drives the transistor Q to conduct, and then performs an audible and visual alarm, and the coil of the DC relay KM1 is energized, the DC relay KM1 is normally closed, the electric shock is disconnected, the power is cut off, and the TV is turned off. The upper limit temperature can be adjusted by controlling the resistance values of the resistors R2, R3, and R4, thus saving electric energy while ensuring the safety of the TV set and prolonging the service life.
虽然本实用新型所揭露的实施方式如上，但所述的内容只是为了便于理解本实用新型而采用的实施方式，并非用以限定本实用新型。任何本实用新型所属技术领域内的技术人员，在不脱离本实用新型所揭露的精神和范围的前提下，可以在实施的形式上及细节上作任何的修改与变化，但本实用新型的专利保护范围，仍须以所附的权利要求书所界定的范围为准。Although the embodiments disclosed in the present utility model are as above, the content described is only an embodiment adopted for the convenience of understanding the present utility model, and is not intended to limit the present utility model. Anyone skilled in the technical field to which the utility model belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the utility model, but the patent of the utility model The scope of protection must still be based on the scope defined in the appended claims.
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| CN201820374878.5U CN207926483U (en) | 2018-03-19 | 2018-03-19 | A kind of television set fan energy-saving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611932A (en) * | 2020-12-24 | 2021-04-06 | 无锡宏广电容器有限公司 | Alternating current capacitor test circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611932A (en) * | 2020-12-24 | 2021-04-06 | 无锡宏广电容器有限公司 | Alternating current capacitor test circuit |
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Granted publication date: 20180928 Termination date: 20190319 |