CN201928365U

CN201928365U - Intelligent damp removing device for television set

Info

Publication number: CN201928365U
Application number: CN2010201334327U
Authority: CN
Inventors: 李立礼
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-14
Filing date: 2010-03-14
Publication date: 2011-08-10
Anticipated expiration: 2020-03-14

Abstract

The utility model discloses an intelligent damp removing device for a television set. A humidity sensor, a voltage comparator, a driving triode, a relay and a hot air heater are electrically connected, the voltage comparator is controlled by the output voltage of the humidity sensor to output and further the driving triode and the relay are controlled to work, so that the hot air heater can be controlled and the purpose of intelligent damp removal can be achieved. When the television set is damp-free, the output voltage of the humidity sensor is high, the voltage comparator outputs low level, the driving triode and the relay are cut off, the television set normally starts and the hot air heater does not work; when the television set is damp, the output voltage of the humidity sensor is low, the voltage comparator outputs high level, the driving triode and the relay are conducted and the hot air heater works to remove the damp of the television set; and after the damp removal is finished, the television set is started again.

Description

The TV set intelligent moisture separating device

Technical field

The utility model relates to household electrical appliance technical field, belongs to TV set intelligent and drives damp protective device.

Background technology

Television set is when particularly the CRT television set uses under wet environment; make moist because of television set through regular meeting; make and occur electrion in the television set; it is fuzzy to cause television set screen to occur in the significant period of time of starting shooting; poor image quality; even, produce fault because of the circuit decreasing insulating burns out the television set element.

Summary of the invention

The utility model has designed a kind of TV set intelligent moisture separating device, when opening television set, can detect the television set situation of making moist automatically at every turn, and can intelligence drive tide: can normally not start when television set does not make moist, pioneer's tide is restarted when making moist.

The technical scheme that its technical problem that solves the utility model adopts is: 5CM place above the television set base, an air-heater is installed, the controlled drives of air-heater.Control circuit utilizes resistance R 1 and R2 that the 12V power supply is carried out dividing potential drop, and get the in-phase input end that voltage on the R2 is added to voltage comparator LM193, inverting input is taken from resistance R 3 and the dividing potential drop of humidity sensor to power supply, the output of LM193 is earlier through isolating diode D1, link to each other with triode T then, triode T drives relay R D, and the TV set power switch output is connected with the contact J1 of relay R D, J2 connects air-heater, and J3 connects television power circuit.When television set does not make moist, M resistance infinity, the LM193 inverting input is than in-phase input end voltage height, the LM193 output low level, T ends, and relay is not worked, and J1 links to each other with J3, and television set normally starts, and the air-heater that connects on the J2 is not worked.When television set made moist, M reduced because of the resistance that makes moist, and the LM193 inverting input is lower than in-phase end voltage, and LM193 exports high level, the T conducting drives relay R D, and J1 is communicated with J2, air-heater energising work, drive tide, this moment, television set can not start because of J1 and J3 disconnection.After driving tide and finishing, it is infinitely great that M tends to again, and LM193 export electronegative potential, and T ends, and relay R D outage disconnects J1 and J2, and air-heater stops, and drives tide and finish, J1 and J3 connection simultaneously, television set startup.Realize that television set normally starts when not making moist, pioneer's tide is restarted when making moist, thereby realizes the purpose of protection television set.

The beneficial effects of the utility model are; television set can normally start under moisture free situation; again can be big in air humidity, by pioneer's tide, restart TV under the situation that television set makes moist; can improve quality of TV image; the protection TV reduces fault, and circuit element is few simultaneously; simple in structure, install easily.

Description of drawings

Fig. 1 is installed in basic block diagram in the television set for the utility model, and M1 is the 200W air-heater among the figure, and the air-heater air port requires to put 5 centimeters above base, and M2 is a television picture tube, and M3 is a base, and M4 is a circuit main board, and M5 is this moisture-reducing device control circuit board.

Fig. 2 is a control circuit of the present utility model, and R1 gets 120K Ω among the figure, and R2 gets 240K Ω, R3 gets 240K Ω, R4 gets 4.7K Ω, and U is the LM193 voltage comparator, and D1, D2 and D3 get the IN4007 diode, T gets 9013, relay R D adopts the JRC relay of 12V, and J1 joins with the input power supply, and J2 outputs to and drives the hectic fever blower fan, J3 outputs to the TV set power end, and M is homemade humidity sensor (eroding away 1 millimeter fourchette at interval on the copper coin of 2 centimetres of 2 centimetres of X).

Fig. 3 is a power circuit of the present utility model, and transformer TR no-load voltage ratio is 220: 12, and B is a rectifier bridge, and C1 and C2 filter capacitor are respectively the electrochemical capacitor of 2200 μ F/25V and 1000 μ F/25V, and U is three-terminal voltage-stabilizing pipe 78L12.

Embodiment

The utility model is described in further detail to reach concrete enforcement below in conjunction with accompanying drawing.

As shown in Figure 1, air-heater mouth of the present utility model places picture tube base top 5 centimeters, and purpose is the easiest influence of moisture of considering on the base that is subjected to of focus voltage, can blow to circuit board to hot blast again simultaneously, can reduce like this and drive between the time of tide.The circuit of control section places main circuit board top, and humidity sensor faces down, in case after long-time the use, build up dust on the panel, influence is to the induction of humidity.

As shown in Figure 2, the 12V power supply obtains the in-phase input end that 8V voltage is added to LM193 through resistance R 1, R2 dividing potential drop, and the inverting input of LM193 links to each other with resistance R 3 and humidity sensor M, and get the M both end voltage, when television set did not make moist, the resistance value of M trend was infinitely great, and LM193 end of oppisite phase voltage is 12V, be higher than in-phase end voltage, output low level, triode T ends, and relay R D does not work, power input J1 links to each other with J3, and television set normally starts; When television set made moist, the resistance value of M was reduced to below the 480K Ω, and at this moment, end of oppisite phase voltage is lower than 8V, LM193 exports high potential, drives triode T, and then makes relay R D energising adhesive, J1 and J2 connect, and with the air-heater work that the J2 end is connected, television set are driven tide, after driving tide and finishing, it is big that the resistance of M becomes, and LM193 in-phase input end current potential is higher than 8V, make LM193 output electronegative potential, T ends, release relay RD, automatically stop to drive tide, J1 and J3 connect simultaneously, and television set starts.So just can realize that the TV function normally starts when television set does not make moist; When making moist, drive tide automatically earlier and restart TV, the fault of avoiding television set to cause because of making moist.Resistance R 3 is designed to variable resistance, and purpose is in order to regulate the sensitivity of moisture-reducing device.

Be illustrated in figure 3 as the employed DC power supply of the utility model, the 220V alternating voltage is 12V through transformer TR step-down, passes through rectifier bridge B then, filter capacitor C1, obtain the direct current about 15V, export of the circuit use of stable 12V voltage with three terminal regulator 78L12 again for Fig. 2.

Claims

1. TV set intelligent moisture separating device, by air-heater (M1), humidity sensor (M), voltage comparator LM193, triode (T), relay (RD), diode (D1, D2, D3) and resistance (R1, R2, R3, R4) form, it is characterized in that, the in-phase input end of voltage comparator LM193 and first resistance (R1), second resistance (R2) joins, inverting input and the 3rd resistance (R3), humidity sensor (M) joins, the output of voltage comparator LM193 is connected to triode (T) base stage through isolating diode (D1), triode (T) collector connection relay (RD), first contact (J1) of relay is connected to the TV set power switch output, second contact (J2) of relay connects air-heater (M1), and the 3rd contact (J3) of relay connects television power circuit, and air-heater (M1) places 5CM place, television set base (M3) top.