CN203709802U - Load drive protection circuit of electric pressure cooker - Google Patents
Load drive protection circuit of electric pressure cooker Download PDFInfo
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- CN203709802U CN203709802U CN201320817208.3U CN201320817208U CN203709802U CN 203709802 U CN203709802 U CN 203709802U CN 201320817208 U CN201320817208 U CN 201320817208U CN 203709802 U CN203709802 U CN 203709802U
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- pressure switch
- relay
- triode
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- 238000001514 detection method Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000010411 cooking Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 230000005856 abnormality Effects 0.000 abstract 1
- 230000002159 abnormal effect Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model relates to a load drive protection circuit of an electric pressure cooker, which is characterized by comprising a relay drive circuit (1) and a pressure switch detecting circuit (2), wherein the detection input end of the pressure switch detecting circuit (2) is connected with the signal output terminal of a pressure switch, the pressure switch detecting circuit (2) is provided with a circuit structure for outputting low level or high level at the output end according to a detection result when the pressure switch is connected or disconnected; the relay drive circuit (1) is provided with two output ends, one output end is connected with a relay coil, and the other output end is connected with the detection input end of the pressure switch detecting circuit (2), so as to form an 'and' logic control circuit structure which is controlled by the pressure switch and is connected with or disconnected from a load through the relay drive circuit (1). According to the utility model, since the detection performance of the pressure switch is used, when the circuits of a single-chip microcomputer and a relay are in abnormality, the circuit of the relay is enabled to be not electrified, the operating safety factor of the circuit of the relay is improved greatly, and the load drive protection circuit of the electric pressure cooker has the benefitial effects of simple circuit structure, safety, reliability and practicability.
Description
Technical field:
The utility model relates to a kind of pressure cooker load Drive Protecting Circuit, and the switch that is applicable to small household appliances is controlled.Belong to electronic switching technology field.
Background technology:
At present, in small household appliances field, general pressure cooker drive circuit is all to adopt pressure switch detection module and relay driving module.Single-chip microcomputer detected pressures on off state, control port export conducting that high or low level directly drives single triode with by, make relay on-off, realize the control of loaded work piece.Pressure switch detection module and relay driving module are the structure of independent separate type, two all between without direct circuit connecting relation.There is following problem in this type of drive: 1., when single-chip microcomputer lost efficacy, port output level state is indefinite (high or low level), if port is output as high level, causes triode adhesive conducting under exceptional condition, the work of product load abnormal; 2. work as triode and damage, during CE short circuit, triode conducting, relay is by adhesive conducting, and product load abnormal is worked.To user, bring huge trouble, even jeopardize personal safety.
Utility model content:
The purpose of this utility model; in order to solve above-mentioned proposed relay drive circuit job insecurity; the problem that causes relay adhesive, load abnormal work; a kind of electric pressure cooking saucepan load Drive Protecting Circuit is provided; by relay circuit and pressure switch are connected in series between 12V power supply; break-make by pressure switch makes relay circuit be operated in normal condition, and that circuit has is reliable and secure, practical and feature cheaply.
The purpose of this utility model can be by taking following technical scheme to reach:
A kind of electric pressure cooking saucepan load Drive Protecting Circuit, its design feature is: comprise that relay drives loop and pressure switch to detect loop, pressure switch detects the signal output part of the detection input Bonding pressure switch in loop, and pressure switch detects loop and has when the connecting or disconnecting of pressure switch being detected the circuit structure at output output low level or high level; Relay drives loop to have two outputs, one of output connects relay coil, two Bonding pressure switches of output detect the detection input in loops, form by pressure switch control, by relay drive loop be switched on or switched off load " with " logic control circuit structure.
The purpose of this utility model can also be by taking following technical scheme to reach:
A kind of Technological improvement plan of the present utility model is: described relay circuit comprises relay R LY1, triode Q1, diode D1 and resistance R 1-R2, and pressure switch detects loop and connected and composed by pressure switch SW1, diode D2, resistance R 3-R4 and capacitor C 1; The base stage of triode Q1 forms the control inputs port of external singlechip chip by resistance R 1, the colelctor electrode of triode Q1 is by connect+12V of relay coil power supply, the emitter stage pressure switch SW1 of Q1 is communicated with, connect+12V of the negative pole power supply of diode D1 and relay R LY1 coils from parallel connection of coils, D1; Resistance R 2 is connected across between the base stage and emitter stage of triode Q1; Start to exchange fire line ACL, the other end of one of relay contact is connected to load; One end of pressure switch SW1 is connected with the emitter stage of triode Q1, other end ground connection GND; One end of resistance R 3 with, the emitter stage of diode D2 negative pole connecting triode Q1, anodal by resistance R 4 and capacitor C 1 ground connection GND, diode D2 positive pole is with the junction of resistance R 4 by connect+5V of resistance R 3 power supply, and the junction of resistance R 4 and capacitor C 1 forms the output that pressure switch detects the external singlechip chip in loop.
A kind of Technological improvement plan of the present utility model is: described triode Q1 can be NPN type triode.
The beneficial effects of the utility model are:
The utility model is by the mode that adopts pressure switch and relay drive circuit to be connected in series, pressure switch and external single-chip microcomputer to relay circuit form " with " logic control structure, to reach, improve the reliability effect that drives relay circuit: 1) because pressure switch disconnects, do not work, when single-chip microcomputer lost efficacy abnormal output high level, triode Q1 conducting, and not conducting of relay, load is not worked; 2) because pressure switch disconnects, do not work, when triode CE the two poles of the earth short circuit, relay cannot obtain electric equally, and load is not worked yet.Therefore, greatly improve the safety coefficient of relay circuit operation, there is the beneficial effect that circuit structure is simple, safe and reliable and practical.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of specific embodiment of the utility model.
Fig. 2 is that one-chip machine port output level directly drives single triode control relay circuit.
Fig. 3 is pressure switch testing circuit.
The specific embodiment:
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Specific embodiment 1:
With reference to Fig. 1, the present embodiment comprises that relay drives loop 1 and pressure switch to detect loop 2, pressure switch detects the signal output part of the detection input Bonding pressure switch in loop 2, and pressure switch detects loop 2 and has when the connecting or disconnecting of pressure switch being detected the circuit structure at output output low level or high level; Relay drives loop 1 to have two outputs, one of output connects relay coil, two Bonding pressure switches of output detect the detection input in loops 2, form by pressure switch control, by relay drive loop 1 be switched on or switched off load " with " logic control circuit structure.
In the present embodiment:
Described relay circuit 1 comprises relay R LY1, triode Q1, diode D1 and resistance R 1-R2, and pressure switch detects loop 2 and connected and composed by pressure switch SW1, diode D2, resistance R 3-R4 and capacitor C 1; The base stage of triode Q1 forms the control inputs port of external singlechip chip by resistance R 1, the colelctor electrode of triode Q1 is by connect+12V of relay coil power supply, the emitter stage pressure switch SW1 of Q1 is communicated with, connect+12V of the negative pole power supply of diode D1 and relay R LY1 coils from parallel connection of coils, D1; Resistance R 2 is connected across between the base stage and emitter stage of triode Q1; Start to exchange fire line ACL, the other end of one of relay contact is connected to load; One end of pressure switch SW1 is connected with the emitter stage of triode Q1, other end ground connection GND; One end of resistance R 3 with, the emitter stage of diode D2 negative pole connecting triode Q1, anodal by resistance R 4 and capacitor C 1 ground connection GND, diode D2 positive pole is with the junction of resistance R 4 by connect+5V of resistance R 3 power supply, and the junction of resistance R 4 and capacitor C 1 forms the output that pressure switch detects loop 2 external singlechip chips.Described triode Q1 is NPN type triode.
In practical application, pressure switch detects the control input end of the external singlechip chip of loop 2 output, relay drives the output of the external singlechip chip in control input end in loop 1, when pressure switch is connected, pressure switch detects loop 2 output output low levels, external singlechip chip output high level drives the control input end in loop 1 to relay, relay drive circuit 1 is connected load; When pressure switch disconnects, pressure switch detects loop 2 output output high level, and external singlechip chip output low level drives the control input end in loop 1, relay drive circuit 1 disconnecting consumers to relay; When load energising during mineralization pressure switch connection, pressure switch disconnect load power-off " with " logic control structure, reach and prevent in singlechip chip and the relay drive circuit object that relay misoperation is done when abnormal.
It comprises that (1) pressure switch testing circuit and relay drive circuit integrate and connect, and pressure switch is controlled triode and driven relay, and pressure switch disconnects, and Control load disconnects
The beneficial effects of the utility model are:
The utility model adopts and is integrated and connect by pressure switch and load driving circuits, and pressure switch control relay drives triode conducting and disconnection, to reach the reliability effect that improves electric pressure cooking saucepan load driving circuits.
Pressure switch is closed:
When pressure switch SW1 closed, the E level of triode Q1 be connected, Q1 determines whether conducting by control signal, realizes Control load.
Pressure switch disconnects:
When pressure switch SW1 disconnects, the E level of triode Q1 disconnects with ground, all can not conducting no matter whether there is control signal to open triode Q1.Q1, and relay can adhesive, can realize pressure switch and disconnect, the reliable guarantee that load disconnects.
The operation principle of the present embodiment:
With reference to Fig. 1-Fig. 3, the electric pressure cooking saucepan load Drive Protecting Circuit that the present embodiment relates to, by 2 two of relay circuit 1 and pressure switch testing circuits independently circuit module be cascaded, pressure switch, triode and relay connect and compose current loop, by pressure switch and single-chip microcomputer form to relay circuit 1 " with " logical construction; When pressure switch detects unlike signal, relay circuit 1 has following different duty:
1, when pressure switch SW1 is closed, the E level of triode Q1 is by pressure switch SW1 ground connection, SW1 is in closed, at kg port, produce low level output to single-chip microcomputer, single-chip microcomputer input port receives after low level, and output high level makes triode Q1 conducting by resistance R 1, now, electric current forms current loop by relay coil, triode Q1 and pressure switch, and relay coil obtains electric, the closing of contact.By pressure switch with carry out the break-make in control load loop by the break-make of Single-chip Controlling triode Q1, make relay adhesive or disconnection, thus control load work.
2, when pressure switch SW1 disconnects, the in the situation that of one-chip machine port output high level or triode Q1 short circuit conducting, relay circuit remains power failure state, and load is not worked.
The above; it is only preferably specific embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the scope that the utility model discloses; according to the technical solution of the utility model and utility model design thereof, be equal to replacement or changed, all being belonged to protection domain of the present utility model.
Claims (3)
1. an electric pressure cooking saucepan load Drive Protecting Circuit, it is characterized in that: comprise that relay drives loop (1) and pressure switch to detect loop (2), pressure switch detects the signal output part of the detection input Bonding pressure switch in loop (2), and pressure switch detects loop (2) and has when the connecting or disconnecting of pressure switch being detected the circuit structure at output output low level or high level; Relay drives loop (1) to have two outputs, one of output connects relay coil, two Bonding pressure switches of output detect the detection input in loops (2), form by pressure switch control, by relay drive loop (1) be switched on or switched off load " with " logic control circuit structure.
2. a kind of electric pressure cooking saucepan load Drive Protecting Circuit according to claim 1, it is characterized in that: described relay circuit (1) comprises relay R LY1, triode Q1, diode D1 and resistance R 1-R2, pressure switch detects loop (2) and is connected and composed by pressure switch SW1, diode D2, resistance R 3-R4 and capacitor C 1; The base stage of triode Q1 forms the control inputs port of external singlechip chip by resistance R 1, the colelctor electrode of triode Q1 is by connect+12V of relay coil power supply, the emitter stage pressure switch SW1 of Q1 is communicated with, connect+12V of the negative pole power supply of diode D1 and relay R LY1 coils from parallel connection of coils, D1; Resistance R 2 is connected across between the base stage and emitter stage of triode Q1; Start to exchange fire line ACL, the other end of one of relay contact is connected to load; One end of pressure switch SW1 is connected with the emitter stage of triode Q1, other end ground connection GND; One end of resistance R 3 with, the emitter stage of diode D2 negative pole connecting triode Q1, anodal by resistance R 4 and capacitor C 1 ground connection GND, diode D2 positive pole is with the junction of resistance R 4 by connect+5V of resistance R 3 power supply, and the junction of resistance R 4 and capacitor C 1 forms the output that pressure switch detects the external singlechip chip in loop (2).
3. a kind of electric pressure cooking saucepan load Drive Protecting Circuit according to claim 1 and 2, is characterized in that: described triode Q1 is NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320817208.3U CN203709802U (en) | 2013-12-11 | 2013-12-11 | Load drive protection circuit of electric pressure cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320817208.3U CN203709802U (en) | 2013-12-11 | 2013-12-11 | Load drive protection circuit of electric pressure cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203709802U true CN203709802U (en) | 2014-07-16 |
Family
ID=51149017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320817208.3U Expired - Lifetime CN203709802U (en) | 2013-12-11 | 2013-12-11 | Load drive protection circuit of electric pressure cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203709802U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800329A (en) * | 2016-09-01 | 2018-03-13 | 德昌电机(深圳)有限公司 | Motor-drive circuit and its application apparatus, motor braking method |
| CN107800336A (en) * | 2016-09-01 | 2018-03-13 | 德昌电机(深圳)有限公司 | Motor and its drive circuit, application apparatus and motor braking method |
| CN108183050A (en) * | 2018-02-27 | 2018-06-19 | 厦门芯阳科技股份有限公司 | A kind of high security switch control relay drive circuit |
| CN112014654A (en) * | 2019-05-29 | 2020-12-01 | 惠州拓邦电气技术有限公司 | Power supply port load detection circuit |
-
2013
- 2013-12-11 CN CN201320817208.3U patent/CN203709802U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800329A (en) * | 2016-09-01 | 2018-03-13 | 德昌电机(深圳)有限公司 | Motor-drive circuit and its application apparatus, motor braking method |
| CN107800336A (en) * | 2016-09-01 | 2018-03-13 | 德昌电机(深圳)有限公司 | Motor and its drive circuit, application apparatus and motor braking method |
| CN108183050A (en) * | 2018-02-27 | 2018-06-19 | 厦门芯阳科技股份有限公司 | A kind of high security switch control relay drive circuit |
| CN108183050B (en) * | 2018-02-27 | 2023-09-05 | 厦门芯阳科技股份有限公司 | High-safety switch control relay driving circuit |
| CN112014654A (en) * | 2019-05-29 | 2020-12-01 | 惠州拓邦电气技术有限公司 | Power supply port load detection circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140716 |
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| CX01 | Expiry of patent term |