CN202140287U - On-off control circuit of refrigerator compressor - Google Patents
On-off control circuit of refrigerator compressor Download PDFInfo
- Publication number
- CN202140287U CN202140287U CN201120045374U CN201120045374U CN202140287U CN 202140287 U CN202140287 U CN 202140287U CN 201120045374 U CN201120045374 U CN 201120045374U CN 201120045374 U CN201120045374 U CN 201120045374U CN 202140287 U CN202140287 U CN 202140287U
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- compressor
- circuit
- triode
- relay
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Abstract
The utility model relates to an on-off control circuit of a refrigerator compressor, relating to a controller for household appliances. The on-off control circuit of the refrigerator compressor is characterized in that: the circuit is connected on an input/output port of a singlechip, two audions are connected to form a level overturning circuit, and then a coil for controlling a relay is output, and a contact of the relay controls a load; wherein an electrodeless capacitor is connected at the front end of a base electrode of a first audion in series, a collector electrode of the first audion is connected with the base electrode of a second audion, and an electrolytic capacitor is connected on the base electrode of the second audion in parallel. In the utility model, a direct current level is isolated by the capacitor and a storage capacitor is also utilized, so as to effectively prevent continuous operation of a compressor, caused by high level output by the singlechip continuously, protect the compressor and reduce potential safety hazards.
Description
Technical field
The utility model relates to a kind of refrigerator controller, particularly a kind of control circuit of controlling the freezer compressor operation.
Background technique
The household refrigerator controller for the control of non-frequency compressor, all is to use relay as switching element now, and relay and master chip plate are placed apart.Through level triggers or level conversion mode relay is controlled, connected or disconnected the compressor of refrigerator.
In the existing technology, most controllers have all adopted single-chip microcomputer to control as main control chip, in these control circuits, utilize the input/output port (I/O mouth) of single-chip microcomputer, and through power conversion apparatus, the output high-low level is controlled compressor.
The shortcoming of sort circuit is; In case generation external interference; Such as situation such as power network fluctuation, high frequency radiation or electrical spark sparkings; Because the antijamming capability of main controller is limited, the control program that very easily takes place to move in single chip microcomputer halt or the single-chip microcomputer runs the situation that flies, thereby causes the out of control of compressor.There is potential safety hazard in the damage that this just is easy to cause compressor.
The model utility content
The purpose of the utility model is a kind of freezer compressor ON-OFF control circuit that can prevent that above-mentioned out-of-control condition from taking place of invention.
For reaching the foregoing invention purpose, the circuit of the utility model is such: circuit is connected on the delivery outlet (I/O mouth) of single-chip microcomputer, uses two triodes to connect and compose the level reverse circuit; The coil of output control relay then; The contact control load of relay, wherein, electrodeless electric capacity of the base stage front end of first triode series connection; The collector electrode of first triode connects the base stage of second triode, on the base stage of second triode also and an electrochemical capacitor arranged.
The electrochemical capacitor of this circuit has the energy storage effect, with the frequency of input/output port output is to become high level after the PWM ripple shaping of 100Hz ~ 1kHz, makes second triode saturated, starts compressor; In the time of the input/output port output low level, can in time end second triode.Electrodeless electric capacity plays the effect of isolated DC level.
The beneficial effect of the utility model is: when cause locked of external interference program software or when crashing; The input/output port of single-chip microcomputer continues output high level or low level, becomes a kind of DC level, in this case; This circuit can be isolated the inflow of this DC level; Triode that yet can't second direct control relay of conducting just can not cause the wrong continuous action of relay, can protect compressor not to be damaged.
Description of drawings
Fig. 1, existing freezer compressor control circuit figure;
Fig. 2, the circuit diagram of the utility model.
Embodiment
Fig. 1 be existing technology utilize the Single-chip Controlling relay switch, control the work of freezer compressor or the circuit that stops.In this circuit, a triode 2 is as switching tube, and the input/output port P01 of single-chip microcomputer only exports high level or low level, changes the saturated or cut-off state of triode 2, and the coil of the relay 5 that control is attached thereto gets.The contact of relay 5 is connected in load 6 circuit, the switch of control load.In case single-chip microcomputer is out of control; Input/output port P01 may continue to export a high level or low level, and can not change, if output is high level always; Triode 2 will saturated always connection; Load 6 just compressor is easy to cause damage with continuous service, and other potential safety hazards are arranged.
Fig. 2 is an embodiment of circuit of the present invention.
In this circuit; Adopt two triode series connection to use; Level signal to input circlult is overturn, and the base stage of first triode 3 is introduced level signal, and collector electrode is connected to the base stage of second triode 4 later on through divider resistance; The coil of the collector connection relay 5 of second triode 4, the contact control load 6 of relay 5.And, be connected in the circuit of triode at the input/output port P01 of single-chip microcomputer, be in series with an electrodeless electric capacity 7, be parallel with an electrochemical capacitor 8 on the base stage of second triode 4 of control relay coil.
Cooperate the software program in the single-chip microcomputer, working principle:
Single-chip microcomputer configures the time lag of compressor switch as required, exports the high-low level at interval clocklike at input/output port P01 accordingly, the corresponding compressor start of general high level, and the corresponding compressor of low level stops.Under the startup situation; Input/output port P01 output be that dutycycle is 50%, frequency is the PWM ripple of 100Hz ~ 1kHz, this output is through the upset of two triodes, and becomes high level through after the shaping of electrochemical capacitor 8; Let second triode 4 saturation conduction; Relay 5 coils get electric adhesive, make contact, the normal worker's group of compressor.Wherein the size of electrochemical capacitor can be adjusted according to output PWM wave frequency, and output frequency is high, and the capacity of electrochemical capacitor 8 is little.
When the needs compressor load stops, input/output port P01 output low level, and the energy storage effect of electrochemical capacitor 8 at this moment disappears, and discharge finishes, and second triode 4 ends, and relay coil dead electricity contact is decontroled, and load just compressor just quits work.
The effect of electrodeless electric capacity 7 is isolated DC level; When producing serious the interference, the external world causes being output as lasting high level or low level the time; This dc level signal will and can not move on by electrodeless electric capacity 7 isolation backward, and after the electrochemical capacitor 8 discharge end, also can let second triode 4 end; Let compressor shutdown, reach and prevent the long-term continuous operation of compressor or be in the purpose under the runaway condition.
Claims (1)
1. freezer compressor ON-OFF control circuit; It is characterized in that: this circuit is connected on the input/output port (P01) of single-chip microcomputer; Use two triodes to connect and compose the level reverse circuit, the coil of output control relay (5) then, the contact control load (6) of relay; Wherein, The base stage front end of first triode (a 3) series connection electrodeless electric capacity (7), the collector electrode of first triode connects the base stage of second triode (4), on the base stage of second triode also and an electrochemical capacitor (8) arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120045374U CN202140287U (en) | 2011-02-23 | 2011-02-23 | On-off control circuit of refrigerator compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120045374U CN202140287U (en) | 2011-02-23 | 2011-02-23 | On-off control circuit of refrigerator compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202140287U true CN202140287U (en) | 2012-02-08 |
Family
ID=45551345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120045374U Expired - Fee Related CN202140287U (en) | 2011-02-23 | 2011-02-23 | On-off control circuit of refrigerator compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202140287U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072141A (en) * | 2011-02-23 | 2011-05-25 | 无锡和晶科技股份有限公司 | Control circuit capable of out-of-control prevention for compressor of refrigerator |
-
2011
- 2011-02-23 CN CN201120045374U patent/CN202140287U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072141A (en) * | 2011-02-23 | 2011-05-25 | 无锡和晶科技股份有限公司 | Control circuit capable of out-of-control prevention for compressor of refrigerator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20190223 |