CN2600965Y - Earth leakage protective device - Google Patents

Abstract

An electric leakage protector belongs to the product of electric appliance, which is primarily used to guaranty personal safety, especially suitable for the place of shower bath; the protector can be manufactured to an electric leakage protection shower, which is composed of an automatic protection circuit and consists of a voltage regulation part and an electric leakage protection part; a transformer, a triode and a relay compose a voltage stabilizing circuit, to guaranty normal operation of the electric leakage protection part; once accidental electric leakage of the electric heating element occurs, an inductor will give one signal to the protective device, and the protective device will start timely and break the dangerous voltage to reach the object of automatic protection; in addition, an alarm is also installed and gives alarm signal simultaneously. The structure of the electric leakage protector is simple and the use is safe and reliable.

Description

Earth leakage protective device

One, technical field: earth leakage protective device belongs to electric equipment products, is mainly used in to guarantee personal safety, and is particularly useful for the shower place, can make the earth leakage protective shower.

Two, technical background: it is reported, in the market with family in the shower that uses, the overwhelming majority does not have ad hoc earth leakage protective device, and is of long duration, or product quality has problem, the accident of leaking electricity easily, meet accident can not guarantee personal safety fully.

Three, summary of the invention: in order definitely to guarantee personal safety; a kind of electric leakage automatic safety device of ad hoc system; it is earth leakage protective device; it mainly is to make automatic protection circuit to constitute; being divided into voltage pressure regulation part and earth leakage protective partly forms; mainly form voltage stabilizing circuit by transformer, triode, relay; to ensure earth leakage protective part operate as normal; in case the unexpected electric leakage of electrothermal part, inductor is given signal of protective device, and protective device in time starts; dangerous voltage is opened circuit; reach automatic protection purpose, alarm also is installed in addition, send alarm signal simultaneously.This earth leakage protective device is simple in structure, and is safe and reliable, and durable in use.

Four, description of drawings: as Fig. 1 is the electrical block diagram of earth leakage protective device.

Five, implementation: this circuit one end is a voltage pressure regulation part, and promptly voltage stabilizing circuit is by triode G ₁, G ₂, voltage-stabiliser tube D ₇With relay J ₂, resistance R ₃, R ₂, capacitor C ₁Constitute the loop, 2 one ends of voltage stabilizing relay J in other words connect transformer B ₁, the other end connects triode G ₁, G ₂, triode G ₁One end and rectifying tube D ₂Connect triode G ₂With resistance R ₁, voltage-stabiliser tube D ₇Link to each other voltage-stabiliser tube D ₇With rectifying tube D ₁, resistance R ₂, R ₃Connect filter capacitor C ₁One end connects transformer B ₁, the other end connects rectifying tube D ₂, contact K ₁, K ₂Connect transformer B ₃Two ends.Pressure stabilization function is played in this loop, ensures trouble free service in the assigned voltage scope.This circuit other end earth leakage protective part is by secondary coil and rectifying tube D ₃, D ₄Form rectification circuit, by triode G ₃, relay J ₁, voltage-stabiliser tube D ₅, resistance R ₄, R ₅, R ₆With rectifying tube D ₆, may command V ₁, constitute leakage protection circuit; Transformer B in other words ₄Two ends and rectifying tube D ₃, D ₄Link to each other, form rectification circuit, capacitor C ₂Connect transformer B ₄With input voltage one end, rectifying tube D ₃, D ₄Meet triode G ₃, resistance R ₄With R ₅, resistance R ₄, R ₅With voltage-stabiliser tube D ₅Controllable silicon V ₁Connect controllable silicon V ₁With resistance R ₆Rectifying tube D ₆, conductor metal sheet E ₁Link to each other and constitute.

When assembling use by last figure, voltage stabilizing circuit is such work, when voltage is higher than prescribed limit, and circuit turn-on, triode G ₁, G ₂, relay J ₂Reach operating state, make K switch ₁Closed; When brownout, because triode G ₁, G ₂Do not reach conducting voltage, be operated in cut-off state, the secondary voltage coil makes B ₄Both end voltage output is normal, ensures that voltage is stabilized in normal range (NR).The earth leakage protective partial circuit is such work, when electric heating element just often, G ₃, J ₁In running order, make K ₃, K ₄Closure, when electric heating element insulation bad, inductor E ₁, obtain voltage signal, then may command V ₁, reach operating state, make G ₃, J ₁Be cut-off state, K ₃, K ₄Disconnect, thereby reach electric leakage protection purpose automatically.Relay J in this protective circuit ₁One side connects alarm, in case above electric leakage accident occurs, will send alarm signal simultaneously, accomplishes that promptly level can be protected automatically, sends warning during postscript, and is more safe and reliable.

Claims (2)

1, earth leakage protective device mainly is that automatic protection circuit constitutes, and is divided into voltage pressure regulation part and earth leakage protective part, it is characterized in that voltage pressure regulation part is by the voltage stabilizing relay J ₂One end connects transformer B ₁, the other end connects triode G ₁, G ₂, triode G ₁One end and rectifying tube D ₂Connect triode G ₂With resistance R ₁, voltage-stabiliser tube D ₇Link to each other voltage-stabiliser tube D ₇With rectifying tube D ₁Connect resistance R ₂, R ₃Connect filter capacitor C ₁One end connects transformer B ₁, the other end connects rectifying tube D ₂, contact K ₁, K ₂Connect transformer B ₃Two ends, the earth leakage protective part is by transformer B ₄Two ends and rectifying tube D ₃, D ₄Link to each other capacitor C ₂Connect transformer B ₄, rectifying tube D ₃, D ₄Meet triode G ₃, resistance R ₄With R ₅, resistance R ₄, R ₅With voltage-stabiliser tube D ₅, controllable silicon V ₁Connect controllable silicon V ₁With resistance R ₆, rectifying tube D ₆, conductor metal sheet E ₁Link to each other and constitute.

2, by the described earth leakage protective device of claim 1, it is characterized in that relay J at the leakage protection circuit place ₁One side connects alarm, sends alarm signal.