CN102109817B

CN102109817B - Automatic control circuit

Info

Publication number: CN102109817B
Application number: CN2011100041169A
Authority: CN
Inventors: 韩俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-11
Filing date: 2011-01-11
Publication date: 2012-07-04
Anticipated expiration: 2031-01-11
Also published as: CN102109817A

Abstract

The invention relates to an automatic control circuit. The automatic control circuit comprises a relay control switch (K) with an input end electrically connected with an alternating current power supply fire wire (L) and an output end electrically connected with a load, wherein one end of a relay coil in the relay control switch (K) is connected with an alternating current power supply earth wire (N) and the other end of the relay coil is electrically connected with a fire wire (L) via a first diode (D1) and a starting switch (K1) in sequence or is electrically connected with the output end of the control switch (K) via the first diode (D1) and a normally closed detection switch (K2) in sequence; and the control switch also comprises a first capacitor (C1) connected with the coil in parallel. The automatic control circuit has simple structure and low cost, is combined with various detection switches, has wide application range and greatly meets the automatic control requirements of old electrical appliance improvement or the traditional electrical appliances.

Description

A kind of automatic control circuit

Technical field

The present invention relates to electronic circuit, be specifically related to a kind of automatic control circuit.

Background technology

Now, the intelligent electric appliance of great majority band single-chip microcomputer or digital circuit has all been realized automatic control and protection, perhaps uses the indivedual controls of self unique circuit realization but still there is very most of traditional electrical equipment not possess automatic control.At present, also do not supply simple in structure, the with low cost and extensive automatic control circuit that is suitable for of traditional electrical equipment use or such automatic control circuit to be disclosed.

Summary of the invention

The technical issues that need to address of the present invention are, how a kind of automatic control circuit is provided, and are simple in structure, with low cost and widely applicable.

Technical matters of the present invention solves like this: make up a kind of automatic control circuit, comprise that input end is electrically connected the CS of AC power live wire and output terminal electrical connection load, said CS is a relay control switch; An end of coil connection AC power ground wire, the other end are electrically connected said live wire through first diode, starting switch successively in the said relay; Perhaps be electrically connected the output terminal of said CS successively through said first diode, normally closed detector switch; When passing through electric current in the said coil; Path between closed power firestreak of said relay control switch and the load, otherwise keep breaking off said path; This control circuit also comprises first electric capacity with said coils from parallel connection of coils.

According to automatic control circuit provided by the invention; The preferred single-pole double-throw switch (SPDT) of said relay control switch; The one of which output terminal is electrically connected said load, and another output terminal is electrically connected said starting switch, when passing through electric current in the said coil; The power firestreak that said relay control switch is closed and connect path between the load of a said output terminal and deenergization live wire and connect path between the coil of said another output terminal, otherwise opposite.

According to automatic control circuit provided by the invention, this control circuit also comprises first resistance that is connected electrically between first diode and the starting switch.

According to automatic control circuit provided by the invention, this control circuit also comprises second electric capacity that is connected electrically between first diode and the normally closed detector switch.

According to automatic control circuit provided by the invention, this control circuit also comprises second diode parallelly connected with first electric capacity, and second diode is electrically connected with first diode reverse.

According to automatic control circuit provided by the invention, first electric capacity is big electric capacity, includes, but are not limited to electrochemical capacitor.

According to automatic control circuit provided by the invention, said starting switch is a normally closed switch, preferred normal off microswitch.

According to automatic control circuit provided by the invention, it is temperature, pressure or water level switch that normally closed detector switch includes, but are not limited to.

Automatic control circuit provided by the invention; Keep the load power supply under the normal condition through providing relay control switch to keep electric current by normally closed detector switch again behind the starting switch trigger relay CS connection load power source; In case appearance causes detector switch to break off unusually then cuts off and keep electric current, disconnecting consumers power supply; Then have only the normal back of detector switch, the starting switch of closed normal off just can be reworked once more, sort circuit is simple in structure, with low cost, in conjunction with various detector switches; Applicable surface is extremely extensive, has greatly satisfied the automatic control needs of old electric equipment altering or traditional electrical equipment.

Description of drawings

Further the present invention is elaborated below in conjunction with accompanying drawing and specific embodiment:

Fig. 1 is the specific embodiment of the invention one an automatic control circuit schematic diagram;

Fig. 2 is the specific embodiment of the invention two automatic control circuit schematic diagrams.

Embodiment

As shown in Figure 1, the automatic control circuit of the specific embodiment of the invention one comprises that input end is electrically connected the relay control switch K that AC power live wire L, output terminal electrical connection load and another output terminal are electrically connected the single-pole double-throw (SPDT) of starting switch K1; One end of this relay control switch K repeat circuit coil connects AC power ground wire N, the other end are electrically connected said CS K successively through the first diode D1, first resistance R 1, starting switch K1 another output terminal, perhaps is electrically connected the output terminal of said CS K successively through the said first diode D1, second capacitor C 2, normally closed detector switch K2; This control circuit also comprises first capacitor C 1 with said coils from parallel connection of coils.Its principle of work is following: closed starting switch K1 during startup; Make relay control switch K turn-on power live wire L and load; The closed path of relay control switch K is provided by normally closed detector switch K2 afterwards; The closed path of block system relay CS K, disconnecting consumers power supply in case detector switch K2 breaks off then have only behind detector switch K2 normally closed, the starting switch K1 of closed normal off just can rework once more.

The second diode D2 as shown in Figure 2, that the specific embodiment of the invention two extra increase on the basis of embodiment one is parallelly connected with first capacitor C 1, the second diode D2 oppositely is electrically connected with the first diode D1.

The above is merely preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to the covering scope of claim of the present invention.

Claims

1. an automatic control circuit comprises that input end is electrically connected the CS of AC power live wire (L) and output terminal electrical connection load, is characterized in that said CS is relay control switch (K); An end of coil connects AC power ground wire (N) in the said relay; The other end is electrically connected said live wire (L) through first diode (D1), starting switch (K1) successively, and the other end also is electrically connected the output terminal of said CS (K) successively through said first diode (D1), normally closed detector switch (K2); This control circuit also comprises first electric capacity (C1) with said coils from parallel connection of coils; Said relay control switch (K) is a single-pole double-throw switch (SPDT), and the one of which output terminal is electrically connected said load, and another output terminal is electrically connected said starting switch (K1); This control circuit also comprise be connected electrically in first diode (D1) and starting switch (K1)) between first resistance (R1); This control circuit also comprises second electric capacity (C2) that is connected electrically between first diode (D1) and the normally closed detector switch (K2).

2. according to the said automatic control circuit of claim 1, it is characterized in that this control circuit also comprises second diode (D2) parallelly connected with first electric capacity (C1), second diode (D2) oppositely is electrically connected with first diode (D1).

3. according to the said automatic control circuit of claim 1, it is characterized in that first electric capacity (C1) is electrochemical capacitor.

4. according to the said automatic control circuit of claim 1, it is characterized in that said starting switch (K1) is the normal off microswitch.

5. according to the said automatic control circuit of claim 1, it is characterized in that normally closed detector switch (K2) is temperature, pressure or water level switch.