CN1251467A

CN1251467A - Power-supply switch for controlling domestic electric appliance

Info

Publication number: CN1251467A
Application number: CN 98121409
Authority: CN
Inventors: 王光辉
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-10-19
Filing date: 1998-10-19
Publication date: 2000-04-26

Abstract

The present invention relates to a power switch for controlling household electrical appliances, in particular, it relates to an energy-saving switch with relay latching circuit. Said invention is characterized by that it adopts such a scheme of that a switch press button is placed after D. C. power supply circuit, passed through the service contact of electrical equipment and is series-connected with another switch press button, then the switch press button is connected with relay. In order to implement simple and convenient multiple control it only needs making external switch press button parallelly-connect with the invented press button switch, and its two end voltages of said switch press button are low, and possess safety.

Description

The mains switch of control household electrical appliance

The present invention relates to control the mains switch of household electrical appliance, relate in particular to a kind of power down switch that has the relay latching circuit.

In the background technology, the mains switch of control household electrical appliance has when relay feedback latching circuit can be implemented in low pressure and cuts off the power supply automatically, when voltage recovers not automatically the function of open circuit to save electric energy.As disclosed power down switch among the Chinese patent CN2070506U, between power supply and household electrical appliance, be connected in series single knife switch and key switch, be arranged in parallel the normally opened contact of relay with key switch, single knife switch is at the turn-off transient switch that can push button.Ought press single knife switch like this, key switch is pressed and is upspring by instantaneous, but relay electric adhesive makes the normally opened contact conducting, circuit is kept conducting state.If voltage is low or outage, relay loosens disconnects normally opened contact, and entire circuit disconnects, and circuit can not recover conducting automatically when voltage recovered, and must reopen, press single knife switch and just can recover conducting.There are two problems in this type of scheme: complex circuit when at first being the switch co-ordination of a plurality of said functions, be difficult to be implemented in different places same electrical appliance is carried out break-make control, next is that the voltage of operator's pull-up or the switch ends pressed is civil power, and is dangerous higher.

The purpose of this invention is to provide to be easy to be implemented in and different local same electrical appliance is carried out break-make control, safer to the operator, the mains switch of energy-conservation control household electrical appliance.

The present invention is by the following technical solutions:

One: comprise the switch box body, switch key, fire ground wire access point, load access point and circuit part, it is characterized in that circuit part comprises first DC power supply circuit, second DC power supply circuit and discharge circuit, switch key is arranged between first DC power supply circuit and the relay, second DC power supply circuit directly connects relay, the normally-closed contact of relay makes mains supply import first DC power supply, the normally opened contact of relay makes mains supply import second DC power supply circuit and load simultaneously, when normally opened contact is closed, one end of discharge circuit is connected with an end of relay, connects the other end of relay between the other end across switch key.

Its two: with first DC power supply circuit in the scheme one and second DC power supply circuit and close, save second DC power supply circuit, used a normally opened contact to connect mains supply and load more.

This invention has the following advantages: 1, in different places same electrical appliance control is realized that circuit is simple, only need switch key AJ in parallel get final product of outside connected switch button with mains switch that quantity can be several; 2, the operator is safer, because the voltage at switch key AJ two ends has been lower than safe voltage through the processing of the reduction voltage circuit 4 in first DC power supply circuit 1; 3, this invention has also that the gap certain hour prevents the function of high frequency break-make between economize on electricity and the Push And Release.

The invention will be further described below in conjunction with Figure of description.

Fig. 1 is the present invention program 1 an embodiment circuit diagram.

Fig. 2 is the present invention program 2 an embodiment circuit diagram.

Fig. 3 is DC power supply circuit 1 circuit diagram of the present invention.

Fig. 4 is an embodiments of the invention profile front view.

Fig. 5 is an embodiments of the invention profile vertical view.

As Fig. 1 and inventive embodiments shown in Figure 3, civil power connects first DC power supply circuit 1 by the normally-closed contact JB of relay J, first DC power supply circuit 1 provides sufficient voltage to discharge to relay J by button AJ, make relay J start adhesive, this moment, the normally-closed contact JB of relay J moved to normally opened contact JK position, make civil power pass through normally opened contact JK and connect second DC power supply circuit, and keep this state for relay J adhesive self-locking.When pushing button AJ, the voltage of relay J is to capacitor C 1 charging, because the C1 capacity is big, make that the relay J electric current is instantaneous to drop to the attract current that is lower than relay J, so relay J discharges, civil power is the normally-closed contact JB by relay J again, wait for starting relay J for the second time, open external load RL.When line voltage was low, for relay J attract current deficiency, load circuit was cut off in the then normally opened contact JK automatic disconnection of relay J, thereby protection electrical equipment is unlikely because of low voltage operating and damages.When having a power failure suddenly when external load RL operate as normal, because relay J does not have attract current, normally opened contact JK automatic disconnection is so circuit has the power saving function of power failure automatic disconnection.Because capacitor C 1 capacity is big, the C1 charge or discharge need the 2-3 time in second, so have 2 to 3 seconds between the Push And Release at interval, have the protecting against shock defencive function.When work, press button AJ at every turn, the operating state of relay J changes once, the operating state of load RL is also changed once, once open or closing motion thereby finish, thereby the switch control of load RL can be carried out by a plurality of control buttons in parallel throughout in the two ends of button AJ, and not disturbed by outer signals.Because civil power is through the step-down current limliting, the voltage at button AJ two ends is very little, generally is about about 12V, so human body is not had the danger of electric shock.Rectification circuit 5 is made up of diode D1 and D2, the backward end of the forward end of diode D1 and diode D2 is connected of reduction voltage circuit and brings out end, the backward end of diode D1 is connected another output of reduction voltage circuit and constitutes the defeated end of a negative pole of rectification circuit, the positive pole that the forward end of diode D2 constitutes rectification circuit brings out end, diode D1 under this structure and D2 are difficult for breakdown, can use cheaply diode and only need two.Embodiment as shown in Figure 1 can improve more convenient in the following areas.A kind of is that photosensitive, temperature-sensitive in parallel with switch key AJ or other special components are set, and makes circuit have photosensitive, temperature-sensitive or other asc switch functions; Another kind is that special components or delay circuit such as photosensitive, temperature-sensitive in parallel with relay J are set, and makes circuit have photosensitive, temperature-sensitive, time-delay or other asc switch functions.

Inventive embodiments as shown in Figure 2 is equivalent to first DC power supply circuit 1 among Fig. 1 embodiment and second DC power supply circuit 2 and closes, and saves second DC power supply circuit 2, has used a normally opened contact JK to connect mains supply and load RL more.Because first DC power supply circuit 1 is always in running order, components and parts generate heat easily, damage in actual applications.

Discharge circuit 3 can be not take in as shown in Figure 1 and Figure 2 the inventive embodiments Shen resistance in parallel with electric capacity and forever be connected mode in the way circuit, such as discharge circuit 3 being connected into way circuit with normally opened contact JK, has only normally opened contact JK closure, discharge circuit 3 just can play a role, and discharge circuit 3 also can be single resistance or electric capacity simultaneously.

As Fig. 4, inventive embodiments shown in Figure 5, the switch box body comprises panel 6 and warehouse 7 two parts, and warehouse 7 is positioned under wall or the furniture surface during use, and panel 6 is covered on the warehouse 7, the household electrical appliance of being controlled are connected with switch by lead, and this switch is suitable for controlling light fixture most.

Claims

1, the mains switch of control household electrical appliance, comprise the switch box body, switch key, fire ground wire access point, load access point and circuit part, it is characterized in that circuit part comprises first DC power supply circuit (1), second DC power supply circuit (2) and discharge circuit (3), switch key AJ is arranged between first DC power supply circuit (1) and the relay J, second DC power supply circuit (2) directly connects relay J, the normally-closed contact JB of relay J makes mains supply import first DC power supply circuit (1), the normally opened contact JK of relay J makes mains supply import second DC power supply circuit (2) and load RL simultaneously, when normally opened contact is closed, one end of discharge circuit (3) is connected with an end of relay J, connects the other end of relay J between the other end across switch key AJ.

2, the mains switch of control household electrical appliance as claimed in claim 1 is characterized in that discharge circuit (3) constitutes by resistance R 1 and capacitor C 1 are in parallel.

3, the mains switch of control household electrical appliance as claimed in claim 1, it is characterized in that first DC power supply circuit (1) comprises the reduction voltage circuit (4) and rectified current (5) that connects successively, reduction voltage circuit (4) makes the voltage of output be lower than safe voltage, rectification circuit (5) is made up of diode D1 and D2, the backward end of the forward end of diode D1 and diode D2 is connected an output that falls circuit (4), the backward end of diode D1 is connected another output of reduction voltage circuit (4) and constitutes the cathode output end of rectification circuit (5), and the forward end of diode D2 constitutes the cathode output end of rectification circuit (5).

4, the mains switch of control household electrical appliance as claimed in claim 1, it is characterized in that the switch box body comprises panel (6) and warehouse (7) two parts, warehouse during use (7) is positioned under wall or the furniture surface, and panel (6) is covered on the warehouse (7), and the household electrical appliance of being controlled are light fixture.

5, the mains switch of control household electrical appliance, comprise the switch box body, switch key, fire ground wire access point, load access point and circuit part, it is characterized in that circuit part comprises first DC power supply circuit (1) and discharge circuit (3), mains supply connects first DC power supply circuit (1), the normally-closed contact JB of relay J makes between first DC power supply circuit (1) and connects relay J across switch key AJ, normally opened contact JK makes first DC power supply circuit (1) directly connect relay J and load RL is connected with mains supply, when normally opened contact JK is closed, one end of discharge circuit (3) is connected with an end of relay J, connects the other end of relay J between the other end across switch key AJ.

6, the mains switch of control household electrical appliance as claimed in claim 5 is characterized in that discharge circuit (3) constitutes by resistance R 1 and capacitor C 1 are in parallel.

7, the mains switch of control household electrical appliance as claimed in claim 5, it is characterized in that first DC power supply circuit (1) comprises the reduction voltage circuit (4) and rectified current (5) that connects successively, reduction voltage circuit (4) makes the voltage of output be lower than safe voltage, rectification circuit (5) is made up of diode D1 and D2, the backward end of the forward end of diode D1 and diode D2 is connected an output that falls circuit (4), the backward end of diode D1 is connected another output of reduction voltage circuit (4) and constitutes the cathode output end of rectification circuit (5), and the forward end of diode D2 constitutes the cathode output end of rectification circuit (5).

8, the mains switch of control household electrical appliance as claimed in claim 5, it is characterized in that the switch box body comprises panel (6) and warehouse (7) two parts, warehouse during use (7) is positioned under wall or the furniture surface, and panel (6) is covered on the warehouse (7), and the household electrical appliance of being controlled are light fixture.