CN2622843Y

CN2622843Y - Mains switching modular able to be controlled for automatic a.c. switching off

Info

Publication number: CN2622843Y
Application number: CN 03217491
Authority: CN
Inventors: 王稳忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-05-29
Filing date: 2003-05-29
Publication date: 2004-06-30
Anticipated expiration: 2013-05-29

Abstract

The utility model relates to a mains switching modular capable of being controlled for automatic a. c. switching off, comprising a module solidifying housing having a leading-out wire end, and an internal circuit solidified in the housing, wherein, the internal circuit comprises a rectifying circuit, also comprises a relay which is supplied power by the alternating current pulsation when started response, and provided and maintained the response current by the direct current output of the rectifying circuit after the response, wherein, the contact of the relay controls the opening and closing of the module, and the internal circuit also comprises a relay electrical outage control circuit controlled by the external control signal, wherein, the external control signal (the remote control signal) realizes the controlled alternating current switching off by the control circuit. The functional circuit modularization is already the development trend. The functional circuit by the module form forms products which are directly sold in the market. The mains switching modular capable of being controlled for automatic a. c. switching off of the utility model is of rational structure design, agile make-and-break, small noise, small power of the control circuit, and also small power consumption. The module also has the overpressure and overflow protection functions.

Description

Can be controlled the power switching module of automatic AC shutdown

Technical field

The utility model relates to a kind of electric component, the particularly switch block of ac power supply, be specially can controlled automatic AC shutdown power switching module.

Background technology

Manually start, remote-controlled (controlled) shutdown often are used on some power consumption equipments, and that uses on remote control colour TV set is the most general.The mains switch of existing remote control color tv mostly adopts push-button mechanical formula mains switch.This mains switch presses the button switch when start, its contact is connected and self-locking; During shutdown, press push-button switch, contact is threaded off and is upspring, and power supply disconnects.At present, the remote-control closedown technology that adopts on the colour TV is not real remote control ac dump, and so-called remote-control closedown is actually and makes colour TV be in a kind of holding state, still expends suitable power under the holding state.For realizing remote control ac dump truly, on the basis of mechanical botton switch, the push button mains switch of electromagnetic tripping apparatus has appearred having, realize automatic AC shutdown function with this, this push-button switch that has electromagnetic tripping apparatus is applied on the colour TV of some brands at present.But this switch exists volume big, complicated in mechanical structure, and shortcoming such as break-make is dumb, and noise is big, the nearly 500mA of dropout drive current of its electromagnetic tripping apparatus, therefore, the power of control circuit is big, and power consumption is also big.

Summary of the invention

The utility model solves particularly the problems referred to above for realizing that power switch device (or power switch circuit) that the remote control ac dump is adopted exists on the color television set of power consumption equipment, and a kind of rational in infrastructure, the electric component product that can really realize the remote control ac dump is provided---power switching module that can controlled automatic AC shutdown.

The utility model is to adopt following technical scheme to realize: power switching module that can controlled automatic AC shutdown, comprise and have module curing housing of drawing line end and the internal circuit that solidifies in housing, internal circuit comprises the bridge rectifier that is made of diode D1-4, have by the diode D3 in the rectification circuit between two alternating current inputs of internal circuit, K switch 1-2, the coil of relay J 1, thermistor RT, diode D9, the dynamic turning circuit of relay that the normally-closed contact J1-1 of K switch 1-1 and relay J 1 conspires to create, wherein K switch 1-1 and K1-2 are that (K1-2 has self-locking device and trip gear to linked switch, K1-1 is a trigger switch, when K1-2 closes also self-locking, K1-1 has a triggering closure in short-term), an ac input end process of rectification circuit is by resistance R 1, the normally opened contact J1-2 of reactance that capacitor C 1 is formed in parallel and relay J 1 links to each other with an alternating current input, another ac input end of rectification circuit directly links to each other with another alternating current input, two dc output ends of rectification circuit are connected with the coil two ends of relay J 1 through K switch 1-2, the normally opened contact J1-2 of relay J 1 is serially connected with the ac power supply circuit of load simultaneously, internal circuit also comprises a collector electrode, emitter is just being exported with the rectification circuit direct current respectively, the triode BG2 that negative pole links to each other, the base loop of triode BG2 is by resistance R 6, diode D5, light-operated triode among the optical coupler G1 is in series, light-emitting diode among the optical coupler G1 is connected with resistance R 7 and diode D8 and is formed the controlled loop of module, and the input of diode D8 is the controlled end of controlled (remote control) ac dump of module in this controlled loop.

Functional circuit moduleization has been development trend.Functional circuit forms product with the form of module, directly sells on market.Described in the utility model can be controlled the power switching module circuit structure design of automatic AC shutdown reasonable, its break-make is flexible, noise is little, the power of control circuit is little, power consumption is also little.It can effectively realize the function of manual startup and shutdown or shutdown of remote control (controlled) automatic AC and the shutdown of sleep time-delay automatic AC in 100-270 lies prostrate the alternating voltage scope.This module also has overvoltage, overcurrent protection function.Because this module is when manual operation, switch (K1-1, K1-2) is only by little electric current, therefore helps prolonging product useful life.

Description of drawings

Fig. 1 is the external structure schematic diagram of module described in the utility model;

Fig. 2 is an internal circuit schematic diagram of the present utility model;

Embodiment

In the present embodiment described module is used for colour TV.The controlled end of module is controlled by the corresponding output control terminal (POWER) of microprocessor in the colour TV (CPU).

Can be controlled the power switching module of automatic AC shutdown, comprise and have module curing housing 1 of drawing line end and the internal circuit that solidifies in housing, internal circuit comprises the bridge rectifier that is made of diode D1-4, two alternating current input L of internal circuit, have between the N by the diode D3 in the rectification circuit, K switch 1-2, the coil of relay J 1, thermistor RT, diode D9, the dynamic turning circuit of relay that the normally-closed contact J1-1 of K switch 1-1 and relay J 1 conspires to create, wherein K switch 1-1 and K1-2 are linked switch, an ac input end process of rectification circuit is by resistance R 1, the normally opened contact J1-2 of reactance that capacitor C 1 is formed in parallel and relay J 1 links to each other with an alternating current input (L), another ac input end of rectification circuit directly links to each other with another alternating current input (N), two dc output ends of rectification circuit are connected with the coil two ends of relay J 1 through K switch 1-2, the normally opened contact J1-2 of relay J 1 is serially connected with the load ac power supply circuit of module simultaneously, internal circuit also comprises a collector electrode, emitter is just being exported with the rectification circuit direct current respectively, the triode BG2 that negative pole links to each other, the base loop of triode BG2 is by resistance R 6, diode D5, light-operated triode among the optical coupler G1 is in series, light-emitting diode among the optical coupler G1 is connected with resistance R 7 and diode D8 and is formed the controlled loop of module, the input of diode D8 is the controlled end of controlled (remote control) ac dump of module in this controlled loop, and the corresponding output control terminal of the microprocessor in this end and the colour TV (the POWER end of CPU) is connected.

Coil two ends in relay J 1 are parallel with capacitor C 4, guarantee that the coil of relay J 1 is steadily charged, the reliable adhesive in its contact.Linked switch in this module (K1-1, K1-2) can be selected the known products of selling on the market for use.

Be connected with the direct-current voltage reducing circuit that constitutes by triode BG1, the resistance R 4 that is connected in triode BG1 base stage, voltage stabilizing didoe DW1 between these module rectification circuit direct current output two ends.Direct-current voltage reducing circuit is used for the protection module circuit when avoiding impacting with high pressure and absorbing the AC power overvoltage unnecessary energy.

This module also comprises current foldback circuit.Current foldback circuit comprises the coil L1 in the load ac power supply circuit that is serially connected with internal circuit and is connected in the protective circuit that is in series by tongue tube GH1 open in usual, resistance R 5, diode D6, voltage stabilizing didoe DW2 of rectification circuit output cathode and resistance R 6 one ends, and is connected with capacitor C 8 between the output negative pole of the positive pole of diode D6 and rectification circuit.

This module also comprises overvoltage crowbar.Overvoltage crowbar is the branch road that is in series by pressure-sensitive electrification resistance RY1 and diode D7 that is connected between the end of the end of normally opened contact J1-2 of relay J 1 and resistance R 6.Sampling voltage is directly taken from AC supply voltage.The parameter of piezo-resistance should guarantee the just conducting when occurring surpassing set point of this branch road, and produces enough electric currents, makes triode BG2 saturation conduction.

Be use and easy to connect, this module is connected to linked switch outside the module, and perhaps the user connects linked switch in respective end when using this module.Like this, this module has 10 to draw line end.1,2 line ends are the alternating current input; 3,4 ends are used to connect K switch 1-1; 5,6 ends are used to connect K switch 1-2; 7,8 ends are the ac output end that powers to the load of module, link to each other with load; 9 ends (being the positive pole of diode D8) are the controlled line end of module, when module is used for colour TV, 9 ends are connected with the corresponding output control terminal (POWER) of the microprocessor (CPU) of colour TV, 10 ends (being the negative pole end of the light-emitting diode of optical coupler G1) are earth terminal, link to each other with the ground end (GND) of the microprocessor (CPU) of colour TV during use.

When needing start, K1-2 closes a switch, simultaneously contact button K switch 1-1 moment connects, alternating current is from power supply N end (drawing line end 2), hold to power supply L through the normally-closed contact J1-1 of the coil of rectifier diode D3 → relay J 1 and energy storage filter capacitor C4 parallel circuits → current limliting PTC element RT1 → diode D9 → K switch 1-1 → relay J 1, make the dynamic turning circuit of relay form the loop, storage capacitor C4 is charged rapidly, when the charging voltage of storage capacitor C4 reaches the coil starting voltage of relay J 1, relay J 1 adhesive, normally-closed contact J1-1 disconnects, thus the dynamic turning circuit of block system relay, and starting process finishes.During the dynamic turning circuit conducting of relay bigger starting current is arranged, can guarantee relay J 1 smooth adhesive.Normally opened contact J1-2 closure makes load ac power supply circuit conducting (the power supply second end N directly inserts the colour TV complete machine), and colour TV is because of getting the electric normal operating conditions that enters; Connect the AC side of rectification circuit simultaneously, the coil of relay J 1 changes the direct current outlet side power supply by rectification circuit at this moment, makes the device J1 that continues still keep charged attracting state (electric current of keeping the relay adhesive of this moment is less).At this moment the direct-current voltage reducing circuit of forming by resistance R 4 voltage stabilizing didoe DW1, triode BG1, " keeping power supply " automatic stabilisation about 15 volts.

When the colour TV in the operate as normal is received the remote-control closedown signal, the corresponding output control terminal of machine inner microprocessor (POWER) output high level, make the controlled loop conducting of module by the controlled end 9 of module, make the light-emitting diode of the optical coupler G1 in the circuit produce optically-controlled signal, thereby make the light-operated triode conducting among the optical coupler G1, triode BG2 is also conducting thereupon, the adhesive of the relay J of flowing through 1 coil is kept electric current by short circuit, therefore relay J 1 discharges, its normally opened contact J1-2 disconnects, and reaches the purpose of remote-control closedown.In like manner click button switch K 1-2, make K switch 1-2 dropout and be in off-state, can reach the purpose of manual shutdown.

When producing overvoltage, the pressure-sensitive electrification resistance RY1 conducting in the overvoltage crowbar makes earial drainage triode BG2 saturation conduction, reaches the purpose of overvoltage protection shutdown.

When producing overcurrent, when the electric current that flows through coil L1 surpasses set point, tongue tube GH1 closure open in usual, the VD of rectification circuit is through resistance R 5, to capacitor C 8 chargings, when charging voltage surpasses the voltage stabilizing value of voltage stabilizing didoe DW2, voltage stabilizing didoe DW2 reverse-conducting, make triode BG2 conducting by base resistance R6, thereby short-circuit relay " keeping the adhesive power supply ", relay J 1 discharges outage.The time constant decision overcurrent time of delay of resistance R 5 and capacitor C 8, diode D6 isolates the charging voltage of other branch road.

Claims

1, a kind of can be controlled the power switching module of automatic AC shutdown, comprise and have the module of drawing line end and solidify housing (1) and solidify internal circuit in housing, internal circuit comprises the bridge rectifier that is made of diode D1-4, it is characterized by:

The dynamic turning circuit of relay that has the normally-closed contact J1-1 by coil, thermistor RT, diode D9, K switch 1-1 and the relay J 1 of diode D3, K switch 1-2 in the rectification circuit, relay J 1 to conspire to create between two alternating current input L, the N of internal circuit, wherein K switch 1-1 and K1-2 are linked switch

Ac input end of rectification circuit links to each other with an alternating current input (L) through the reactance that is formed in parallel by resistance R 1, capacitor C 1 and the normally opened contact J1-2 of relay J 1, another ac input end of rectification circuit directly links to each other with another alternating current input (N), two dc output ends of rectification circuit are connected with the coil two ends of relay J 1 through K switch 1-2, the normally opened contact J1-2 of relay J 1 is serially connected with the load ac power supply circuit of module simultaneously

Internal circuit also comprises the triode BG2 that a collector electrode, emitter link to each other with the positive and negative electrode of rectification circuit direct current output respectively, the base loop of triode BG2 is in series by the light-operated triode among resistance R 6, diode D5, the optical coupler G1, and the light-emitting diode among the optical coupler G1 is connected with resistance R 7 and diode D8 and formed the controlled loop of module.

2, as claimed in claim 1 can be controlled the power switching module of automatic AC shutdown; it is characterized by: this module also comprises current foldback circuit; current foldback circuit comprises the coil L1 in the load ac power supply circuit that is serially connected with internal circuit and is connected in the protective circuit that is in series by tongue tube GH1 open in usual, resistance R 5, diode D6, voltage stabilizing didoe DW2 of rectification circuit output cathode and resistance R 6 one ends, and is connected with capacitor C 8 between the output negative pole of the positive pole of diode D6 and rectification circuit.

3, as claimed in claim 1 or 2 can be controlled the power switching module of automatic AC shutdown; it is characterized by: this module also comprises overvoltage crowbar, and overvoltage crowbar is the branch road that is in series by pressure-sensitive electrification resistance RY1 and diode D7 that is connected between the end of the end of normally opened contact J1-2 of relay J 1 and resistance R 6.

4, as claimed in claim 1 or 2 can be controlled the power switching module of automatic AC shutdown, it is characterized by: be connected with the direct-current voltage reducing circuit that constitutes by triode BG1, the resistance R 4 that is connected in triode BG1 base stage, voltage stabilizing didoe DW1 between these module rectification circuit direct current output two ends.

5, as claimed in claim 3 can be controlled the power switching module of automatic AC shutdown, it is characterized by: be connected with the direct-current voltage reducing circuit that constitutes by triode BG1, the resistance R 4 that is connected in triode BG1 base stage, voltage stabilizing didoe DW1 between these module rectification circuit direct current output two ends.