CN2248412Y

CN2248412Y - Multi-function automatic protecting voltage stabilizer for overload and short-circuit

Info

Publication number: CN2248412Y
Application number: CN 95242206
Authority: CN
Inventors: 田维中
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-09-29
Filing date: 1995-09-29
Publication date: 1997-02-26
Anticipated expiration: 2005-09-29

Abstract

The utility model relates to a multifunctional automatic protecting voltage stabilizer for an overload and a short circuit. The utility model is composed of a controlling circuit and a power switching circuit and is characterized in that an overload protector with an electrothermal wire and a memory metal sheet is connected in series with a power input circuit of the voltage stabilizer. At the time of the overload or the short circuit, the electrothermal wire of the protector heats to cause the memory metal sheet to deform and to open a circuit so as to switch off a power source and to switch on a voltage dividing rectification circuit, and an acoustic-optic alarm circuit is started to send out an acoustic-optic alarm signal. Once a load is decreased, or the fault is cleared, the overload protector is recovered to a normal state, and the acoustic-optic alarm signal disappears. Besides the functions of over voltage, under voltage, time delay and stabilized voltage, the utility model also has the functions of automatic protection and acoustic-optic alarm for the overload or the short circuit.

Description

Pressurizer is protected in multi-functional excess load, short circuit automatically

The utility model is that pressurizer is protected in the multi-functional excess load, the short circuit that belong to the household electrical appliance servicing unit automatically.

Though the pressurizer of Sheng Chaning has multiple model and technical performance in the market; it is multi-functional that the pressurizer that has also has superpressure, under-voltage, time-delay and voltage stabilizing etc.; but they do not have reliable excess load, short circuit automatic safety device; lack correct use general knowledge the user; and excess load is used under the situation of household electrical appliance or appliance circuit short circuit; burn out pressurizer easily, thereby be directed at hidden danger such as household electrical appliance damage, fire and personal safety.Such as " simple and efficient D.C. regulated power supply " (87101348) of Chinese patent, and " a kind of stabilized voltage power supply with protective circuit " (86206136), there are not perfect excess load, short circuit autoprotection device yet, still have above-mentioned deficiency.The utility model is according to the needs in this type of situation and market; on the basis of protection pressurizer original superpressure, under-voltage, time-delay, voltage stabilizing function; excess load, short circuit automatic protection circuit and sound light alarming circuit have been set up; just can in time remind the user to reduce applied load or fix a breakdown; make pressurizer reach operate as normal; thereby avoid burning out of pressurizer, protection household electrical appliance, elimination disaster hidden-trouble and protection personal safety.

The purpose of the utility model design; it is the deficiency that is to overcome existing pressurizer; on the basis of preserving pressurizer superpressure, under-voltage, time-delay and voltage stabilizing function; adopt automatic protection circuit and sound light alarming circuit; be designed to multi-functional excess load, short circuit and protect pressurizer automatically; make it when excess load or short circuit; can be by overload protective device automatic disconnection pressurizer power supply; and connect acousto-optic circuit and send the sound and light alarm signal; prolong pressurizer useful life thereby have; protection household electrical appliance, and the advantage of eliminating disaster hidden-trouble and protection personal safety.

Also in conjunction with the accompanying drawings project organization of the present utility model is described in detail as follows with embodiment below:

Fig. 1 is the fundamental diagram that pressurizer is protected in multi-functional excess load, short circuit automatically.

The utility model, as shown in Figure 1, it is by control circuit A ₂With power-switching circuit A ₃Deng composition, it is characterized in that also having an overload protective device JRP who forms by heating wire, memory metal sheet be connected on power supply input protective tube BL afterwards with regulator control circuit A ₂With power-switching circuit A ₃Before; if any load g-load or appliance circuit short circuit; the electrothermal wire heating of JRP makes its memory metal sheet distortion open circuit, disconnects the power supply of pressurizer and forms the automatic protection circuit of pressurizer excess load or short circuit and 1,2 contact parallel resistance R by overload protective device JRP ₁, R ₂The branch voltage rectifier of forming be rectified into direct current by diode bridge B and capacitor C, and startup work is astatic multivibrator A when pressurizer excess load or short circuit ₁, buzzer HfP and resistance R ₃, LED power supply sends the sound and light alarm signal, thereby forms the sound light alarming circuit of pressurizer excess load or short circuit.Wherein, the overload protective device JRP that the automatic protection circuit of excess load or short circuit is made up of heating wire and memory metal sheet by protective tube BL series connection pressurizer power supply input switch K; and the pressurizer of looking different capacity selects different power overload protector JRP for use, the output of its JRP and the superpressure of pressurizer, under-voltage, time-delay, controlling circuit of voltage regulation A ₂With power-switching circuit A ₃Power input be connected 1, the 2 contact parallel resistance R of JRP simultaneously ₁, R ₂Form to divide a voltage rectifier, be rectified into direct current, and when pressurizer excess load or short circuit, start work, send the sound and light alarm signal and form to the sound light alarming circuit power supply by diode bridge B and capacitor C.The superpressure of pressurizer, under-voltage, time-delay, controlling circuit of voltage regulation A ₃With power-switching circuit A ₃Voltage input end be connected with the output of overload protective device JRP, and the protective tube BL by pressurizer is connected A with K switch with outer power plug ₂And A ₃Voltage output end be connected with the voltage stabilizing output contact of pressurizer respectively.Sound light alarming circuit is by astatic multivibrator A ₁Left end be connected with the right-hand member of electric bridge B and the upper end of capacitor C, right-hand member is connected C, A with the lower end of buzzer HTP and LED respectively ₁The lower end and the upper end ground connection of HTP, R is passed through in the upper end of LED ₃Ground connection and forming.

Operation principle of the present utility model is as follows: when pressurizer excess load or short circuit, the electrothermal wire heating of overload protective device JRP makes memory metal sheet distortion open circuit, disconnects pressurizer A ₂And A ₃Power supply, circuit is in off position, makes pressurizer and household electrical appliance all obtain protection.Start R simultaneously ₁, R ₂The branch voltage rectifier of forming is rectified into the astatic multivibrator A of direct current to sound light alarming circuit by electric bridge B and capacitor C ₁, buzzer HTP and LED power supply and send the sound and light alarm signal, in case reduce load or fix a breakdown, then overload protective device JRP recovers normal, the sound and light alarm signal disappears immediately.The automatic protection of this pressurizer excess load or short circuit and acoustic-optic alarm can unit productions.

In a word; the multi-functional excess load, the short circuit automatic protector that manufacture and design according to present embodiment; just can be by the overload protective device of heating wire and memory metal sheet composition; and when pressurizer excess load or short circuit automatic disconnection pressurizer power supply; make branch voltage rectifier in parallel be in channel status simultaneously; and provide direct current to sound light alarming circuit by rectification; start astatic multivibrator, buzzer and light-emitting diode work and send the sound and light alarm signal; in case reduce to load or fix a breakdown; it is normal that overload protective device recovers, and the sound and light alarm signal disappears immediately.The utility model keeps outside superpressure, under-voltage, time-delay, the voltage stabilizing function; also have excess load or short circuit protection and sound and light of alarm automatically, thereby can not burn out pressurizer and household electrical appliance, eliminate disaster hidden-trouble; protect personal safety, and can prolong the life-span of pressurizer.

Claims

1, pressurizer is protected in a kind of multi-functional excess load, short circuit automatically; it is made up of control circuit and power-switching circuit etc., it is characterized in that also having an overload protective device JRP who forms by heating wire, memory metal sheet be connected on power supply input protective tube BL afterwards with regulator control circuit A ₂With power-switching circuit A ₃Before; if any load overloading or appliance circuit short circuit; the electrothermal wire heating of JRP makes its memory metal sheet distortion open circuit, disconnects the power supply of pressurizer and forms the automatic protection circuit of pressurizer excess load or short circuit and 1,2 contact parallel circuits R by overload protective device JRP ₁, R ₂The branch voltage rectifier of forming is rectified into direct current by diode bridge B and capacitor C, and starts work to astatic multivibrator A when pressurizer excess load or short circuit ₁, buzzer HTP and resistance R ₃, LED power supply sends the sound and light alarm signal, thereby forms the sound light alarming circuit of pressurizer excess load or short circuit.

2, pressurizer is protected in multi-functional excess load as claimed in claim 1, short circuit automatically; it is characterized in that the overload protective device JRP that automatic protection circuit is made up of heating wire and memory metal sheet by protective tube BL series connection pressurizer power supply input switch K; and the pressurizer of looking different capacity selects different capacity JRP overload protective device for use, the output of its JRP and the superpressure of pressurizer, under-voltage, time-delay, controlling circuit of voltage regulation A ₂With power-switching circuit A ₃Power input be connected 1, the 2 contact parallel resistance R of JRP simultaneously ₁, R ₂Form to divide a voltage rectifier, and when pressurizer excess load or short circuit, be in channel status, be rectified into direct current by diode bridge B and capacitor C and power, send the sound and light alarm signal and form to sound light alarming circuit.

3, pressurizer is protected in multi-functional excess load as claimed in claim 1, short circuit automatically, it is characterized in that sound light alarming circuit is by astatic multivibrator A ₁Left end be connected with the right-hand member of electric bridge B and the upper end of capacitor C, right-hand member is connected with the lower end of buzzer HTP and LED respectively, capacitor C, astatic multivibrator A ₁The lower end and the upper end ground connection of buzzer HTP, R is passed through in the upper end of LED ₃Ground connection and forming.