CN2913628Y - Temperature control circuit for vehicle engine cooling system - Google Patents
Temperature control circuit for vehicle engine cooling system Download PDFInfo
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- CN2913628Y CN2913628Y CN 200620110504 CN200620110504U CN2913628Y CN 2913628 Y CN2913628 Y CN 2913628Y CN 200620110504 CN200620110504 CN 200620110504 CN 200620110504 U CN200620110504 U CN 200620110504U CN 2913628 Y CN2913628 Y CN 2913628Y
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Abstract
A temperature-control circuit for cooling system of automobile engine comprises a temperature sensor (1), a signal processing circuit (2), a control unit (3), a voltage stabilizing circuit (8), and an over-voltage protection circuit (7). The signal processing circuit (2) receives and process voltage signals outputted from the temperature sensor (1), and then the processed voltage signals are transmitted to the control unit (3). The control unit (3) is connected between the output terminal of the signal processing circuit (2) and the input terminal of a cooling control circuit (6). A control setting circuit (9) is arranged in a way that the output terminal thereof is connected with the input terminal of the control unit (3). This temperature-control circuit for the cooling system of automobile engine has the advantages that a temperature sensor is utilized to realize the engine temperature setting, overheat alarm and display control, has low cost, good versatility and high precision, can meet the requirement of temperature control of various engines, and has various protective functions such as over-voltage protection and load short-circuit protection.
Description
Technical field
The utility model relates to the engine cooling control system, is specifically related to a kind of temperature control circuit of car engine cooling system.
Background technique
Existing motor car engine temperature control circuit function singleness, demonstration, warning, control circuit adopt different temperature transducers and control circuit respectively, its complex structure, precision is low, and cost is higher; The cooling system of different automobile types adopts different setting temperatures, and the setting temperature of engine-cooling system is non-adjustable, causes the temperature control device of existing cooling system to lack versatility; Existing automobile generally uses Fuse Type or the insurance of wire formula to do the load short circuits protection; after the short trouble generation appears in the load of engine-cooling system; fuse melting; owing to there is not signal prompt; can not in time find fault, be unfavorable for the engine health operation, and after short trouble is removed; need the artificial insurance of changing, not only inconvenience but also caused waste.
The model utility content
Technical problem to be solved in the utility model provides a kind of temperature control circuit with car engine cooling system of multiple function.
In order to solve the problems of the technologies described above, the temperature control circuit of engine-cooling system described in the utility model comprises temperature transducer, signal processing circuit, cooling control circuit, mu balanced circuit, overvoltage crowbar; Wherein,
Overvoltage crowbar: connect automobile power source, power to mu balanced circuit;
Mu balanced circuit: receive the voltage of overvoltage crowbar output, export to each circuit unit;
Temperature transducer: be the temperature transducer in the car engine cooling system, output signal to signal processing circuit;
Cooling control circuit: directly power the cooling mechanism on the output signal Control of Automobile motor by automobile power source.
It is characterized in that: signal processing circuit receives the voltage signal of temperature transducer output, exports to control unit after the processing; Described control unit is connected between the input end of the output terminal of signal processing circuit and cooling control circuit; The output terminal of a control setting circuit is connected to the input end of control unit.
According to a preferred version of the present utility model, the output terminal of described control unit also connects a warning circuit.
According to a preferred version of the present utility model, the output terminal of described control unit also connects a display circuit.
According to a preferred version of the present utility model; described overvoltage crowbar is by triode Q03, Q04; resistance R 05, R04 and voltage-stabiliser tube D04 form; automobile storage battery voltage is received the emitter of triode Q03 and Q04 by diode D06; the base stage of triode Q04 connects power supply negative terminal by resistance R 05 and the voltage-stabiliser tube D04 that is connected in series; the collector electrode of triode Q04 is connected with the base stage of triode Q03; and connecing power supply negative terminal by resistance R 04, the collector electrode of triode Q03 connects the input end of mu balanced circuit.
According to a preferred version of the present utility model, described cooling control circuit comprises relay J, R06 and switch triode Q02 are insured in recovery certainly; The coil contact of described relay J is connected between the collector electrode and positive supply of described switch triode Q02, and the emitter of switch triode Q02 connects the negative terminal of power supply, and the base stage of switch triode Q02 connects an output terminal of described control unit; The normally opened contact of described relay J, recover the two ends that insurance R06 and external refrigeration mechanisms in series are connected automobile power source certainly.
According to a preferred version of the present utility model, described control unit is made up of single-chip microcomputer IC33 and peripheral circuit thereof, corresponding control setting circuit is by preset temperature switch W1, W2, electrical storage IC34, resistance R 326, R327 constitutes, insert the input/output port P0.0 of single-chip microcomputer IC33 after wherein preset temperature switch W1 connects with resistance R 326, preset temperature switch W2 inserts one of single-chip microcomputer IC33 input/output port P0.2 in addition at the back of connecting with resistance R 327, two input/output terminals of electrical storage IC34 respectively with two input/output port P5.3 of single-chip microcomputer IC33, P5.4 connects.
According to a preferred version of the present utility model, described control unit comprises A/D change-over circuit IC31 and peripheral circuit thereof.Corresponding control setting circuit is made up of resistance R 31, R32, R33, R34, preset temperature potentiometer W, described resistance R 31, R32, R33, R34, potentiometer W are connected in series, simultaneously, the adjustable end of preset temperature potentiometer W is connected with the in-phase input end of voltage comparator ic 3-2, and the connected node of resistance R 32, R33 is connected with the inverting input of voltage comparator ic 3-1.
The temperature control circuit of engine-cooling system described in the utility model, adopt a temperature transducer to realize engine temperature setting, the too high warning of temperature and shown controlling, cost is low, highly versatile, the precision height, can be suitable for different motors to temperature controlled needs, and have kinds of protect functions such as overvoltage protection, load short circuits protection, reliability height; When load is short-circuited fault, do not influence temperature and show, the short circuit indication is arranged simultaneously, can in time find fault, be convenient to maintenance, after the load short circuits trouble shooting, system recovers normal working automatically.
Description of drawings
Fig. 1 is the temperature control circuit functional-block diagram of engine-cooling system described in the utility model.
Fig. 2 is the temperature control circuit circuit diagram of the engine-cooling system of employing chip microcontroller described in the utility model.
Fig. 3 is the temperature control circuit circuit diagram of the engine-cooling system of employing simulation control figure described in the utility model demonstration.
Fig. 4 is the temperature control circuit circuit diagram of the engine-cooling system of employing simulation steering needle described in the utility model demonstration.
Fig. 5 is the Single-chip Controlling program flow diagram.
Embodiment
Referring to Fig. 1, the temperature control circuit of engine-cooling system described in the utility model is made up of temperature transducer 1, signal processing circuit 2, control unit 3, cooling control circuit 6, mu balanced circuit 8, overvoltage crowbar 7, control setting circuit 9; Temperature transducer in the car engine cooling system 1 is connected with signal processing circuit 2, outputs signal to signal processing circuit 2; Signal processing circuit 2 receives the voltage signal of temperature transducer 1 output, exports to control unit 3 after the processing; Described control unit 3 is connected between the input end of the output terminal of signal processing circuit 2 and cooling control circuit 6; The output terminal of control setting circuit 9 is connected to the input end of control unit 3, and cooling control circuit 6 is directly powered by automobile power source 10, receives the control signal of control unit 3 outputs, the cooling mechanism 11 on the output signal Control of Automobile motor; In addition, overvoltage crowbar 7 connects automobile power source 10, gives mu balanced circuit 8 power supplies, and mu balanced circuit 8 is the circuit unit power supply.
According to a preferred version of the present utility model, the output terminal of control unit 3 also connects a warning circuit 5, and warning circuit 5 sends warning when the voltage signal of engine temperature sensing unit output surpasses the value that control setting circuit 9 sets.
According to a preferred version of the present utility model, the output terminal of control unit 3 also connects a display circuit 4, and display circuit 4 shows engine temperature in real time.
Referring to Fig. 2, Fig. 3 and Fig. 4, described signal processing circuit 2 is made up of resistance R 21～R26, reference diode D21, electrochemical capacitor C21, C22, operational amplifier IC2; The voltage signal of temperature transducer 1 output is input to the level of being made up of operational amplifier IC2, R23, R24R, 25R, 26 through R22 and shifts amplification circuit, and voltage signal is after treatment exported to control unit 3; C2 is a filter capacitor, leaches noise signal, and D21 is the overvoltage protection reference diode, prevents too high voltages damage operational amplifier IC2.
Described overvoltage crowbar 7 is by triode Q03, Q04, resistance R 05, R04 and voltage-stabiliser tube D04 form, automobile storage battery voltage is received the emitter of triode Q03 and Q04 by diode D06, the base stage of triode Q04 connects power supply negative terminal by resistance R 05 and the voltage-stabiliser tube D04 that is connected in series, the collector electrode of triode Q04 is connected with the base stage of triode Q03, and connecing power supply negative terminal by resistance R 04, the collector electrode of triode Q03 connects the input end of mu balanced circuit 8; The voltage stabilizing value that is higher than reference diode D04 when supply voltage, reference diode D04 punctures, resistance R 05 provides ground level voltage for triode Q04, triode Q04 conducting, the Base-Emitter both end voltage of triode Q03 is near 0 volt, and triode Q03 ends, and stops to stabilized power supply 8 and warning circuit 5 power supplies, all circuit quit work, and reach the overvoltage protection purpose; When supply voltage just often, voltage is lower than reference diode D04 voltage stabilizing value, triode Q04 ends, triode Q03 conducting, circuit recovers normal working.
Described cooling control circuit 6 is by relay J, light emitting diode D08, D09, diode D05, D06, D7, and voltage-stabiliser tube D01, resistance R 07, R08 recover insurance R06 and switch triode Q02 certainly and form; The coil contact string of described relay J is between the collector electrode and positive supply of described switch triode Q02, the emitter of switch triode Q02 connects the negative terminal of power supply, and the base stage of switch triode Q02 connects an output terminal of described control unit 3 by voltage-stabiliser tube D01; The normally opened contact of described relay J and diode D07 are serially connected between power positive end and the negative terminal, recover insurance R06 one end certainly and are connected with the normally opened contact of relay J, and the other end is connected with cooling mechanism 11; Be connected between cooling mechanism 11 and the negative terminal after described resistance R 08 and the light emitting diode D09 series connection, resistance R 07 be connected across after light emitting diode D08 connects from recovering insurance R06 two ends, when cooling control circuit 6 work, the normally opened contact adhesive of relay J, if when short circuit appears in cooling mechanism 11, the resistance value of recovering insurance R06 certainly increases, and recovers insurance R06 both end voltage certainly and equals power supply positive and negative terminal voltage, light emitting diode D08 is luminous, shows short trouble; Remove when the short circuit of cooling mechanism 11, recover insurance R06 resistance certainly and recover normal value, circuit recovers original working state.
Described warning circuit 5 is made up of resistance R 03, R02, light emitting diode D02, triode Q01, buzzer B.
Referring to Fig. 2, described control unit 3 is made up of single-chip microcomputer IC33 and peripheral circuit thereof, program as shown in Figure 5 is installed in single-chip microcomputer, single-chip microcomputer can be selected SN1704 for use, described control setting circuit 9 is by preset temperature switch W1, W2, electrical storage IC34, resistance R 326, R327 constitutes, insert the input/output port P0.0 of single-chip microcomputer IC33 after wherein preset temperature switch W1 connects with resistance R 326, preset temperature switch W2 inserts one of single-chip microcomputer IC33 input/output port P0.2 in addition at the back of connecting with resistance R 327, two input/output terminals of electrical storage IC34 respectively with two input/output port P5.3 of single-chip microcomputer IC33, P5.4 connects, by regulating the preset temperature switch W1 of control setting circuit 9, W2, can preset the control temperature value, and be stored in the electrical storage IC34 by single-chip microcomputer IC33, avoided each start all will be from new preset temperature; The temperature voltage signal of temperature transducer 1 output is added to an inlet opening P4.0 of single-chip microcomputer by the output terminal of signal processing circuit 2, the single-chip microcomputer temperature data is connected to nixie tube LD1 anode after delivery outlet P1.1, P1.2, P1.3 drive triode Q31, Q32, Q33 amplification, the P5.0 of single-chip microcomputer, P5.1, P5.2, P4.1～P4.3 mouth are connected to the negative electrode of nixie tube LD1, nixie tube LD1 showing temperature data respectively through resistance R 331～R337.When engine temperature raises, the temperature voltage signal of temperature transducer 1 output is added to the inlet opening P4.0 of single-chip microcomputer by the output terminal of signal processing circuit 2, when voltage signal that single-chip microcomputer is received greater than being stored in when presetting the control temperature value in the electrical storage IC34, the delivery outlet P0.1 output high level signal of single-chip microcomputer, the switching tube Q02 conducting of cooling control circuit 6, the normally opened contact adhesive of relay J drives cooling mechanism 11 work, lowers the temperature to motor; The voltage signal of receiving as the inlet opening of single-chip microcomputer P4.0 is during greater than the alarm temperature value, and delivery outlet P1.4 exports high level signal, the switching tube Q01 conducting of warning circuit 5, and warning circuit 5 work, loudspeaker B sends chimes of doom, and light emitting diode D02 is luminous simultaneously.
Referring to Fig. 3, described control unit 3 is made of A/D change-over circuit IC31 and peripheral circuit, voltage comparator ic 3-1, IC3-2, IC3-3, IC3-4 and peripheral circuit thereof, and voltage comparator can be selected LM339 for use.Corresponding control setting circuit 9 is made up of resistance R 31, R32, R33, R34, preset temperature potentiometer W, described resistance R 31, R32, R33, R34, preset temperature potentiometer W are connected in series, simultaneously, the adjustable end of preset temperature potentiometer W is connected with the in-phase input end of voltage comparator ic 3-2, and the connected node of resistance R 32, R33 is connected with the inverting input of voltage comparator ic 3-1; The temperature voltage signal of temperature transducer 1 output is added to the inverting input of voltage comparator ic 3-1, IC3-2 by the output terminal of signal processing circuit 2, the analog amount input port 31 that connects A/D change-over circuit IC31 simultaneously, the digital quantity output port of A/D change-over circuit IC31 is connected with nixie tube LD1, A/D change-over circuit IC31 becomes digital signal with analog signal conversion, by nixie tube LD1 temperature value is shown again; By regulating the adjustable end of preset temperature potentiometer W, can export different voltages, thereby preset the control temperature value; When engine temperature raises, the temperature voltage signal of temperature transducer 1 output is added to A/D change-over circuit IC31 by the output terminal of signal processing circuit 2, the input end in the same way of voltage comparator ic 3-1 and the reverse input end of voltage comparator ic 3-2, when its voltage during greater than the voltage of the adjustable end of the preset temperature potentiometer W that is connected with comparator IC3-2 in-phase input end output, voltage comparator ic 3-2 output low level, comparator IC3-3 ends, mu balanced circuit 8 gives capacitor C 33 chargings by resistance R 38, has time-lag action, can anti-Flutter, when capacitor C 33 voltages during greater than the voltage of voltage comparator ic 3-4 reverse input end, voltage comparator ic 3-4 exports high level, the switching tube Q02 conducting of cooling control circuit 6, the normally opened contact adhesive of relay J drives cooling mechanism 11 work, lowers the temperature to motor.After engine temperature descends, during the voltage of the adjustable end output of preset temperature potentiometer W that voltage comparator ic 3-2 reverse input end voltage connects less than comparator IC3-2 in-phase input end, voltage comparator ic 3-2 ends, mu balanced circuit 8 gives capacitor C 32 chargings by resistance R 37, has time-lag action, prevent that cooling control circuit 6 is at zero point frequent starting too, when capacitor C 32 voltages greater than voltage comparator ic 3-3 in the same way during the voltage of input end, voltage comparator ic 3-3 output low level, voltage comparator ic 3-4 output low level, the switching tube Q02 of cooling control circuit 6 ends, and the normally opened contact of relay J disconnects, and cooling mechanism 11 quits work; When the voltage of voltage comparator ic 3-1 in-phase input end during greater than the voltage of inverting input, voltage comparator ic 3-1 exports high level, the switching tube Q01 conducting of warning circuit 5, at this moment, temperature alarm circuit work, loudspeaker B sends chimes of doom, and light emitting diode D02 is luminous simultaneously.
Referring to Fig. 4, this mode of execution is to make the A/D change-over circuit IC31 of Fig. 3 and peripheral circuit thereof into emitter follower IC32, and display mode changes the gauge outfit demonstration into simultaneously.
Claims (9)
1, a kind of temperature control circuit of car engine cooling system comprises temperature transducer (1), signal processing circuit (2), cooling control circuit (6), mu balanced circuit (8), overvoltage crowbar (7); Wherein,
Overvoltage crowbar (7): connect automobile power source (10), give mu balanced circuit (8) power supply;
Mu balanced circuit (8): receive the voltage of overvoltage crowbar (12) output, export to each circuit unit;
Temperature transducer (1): be the temperature transducer in the car engine cooling system, output signal to signal processing circuit (2);
Cooling control circuit (6): directly power by automobile power source (10), the cooling mechanism (11) on the output signal Control of Automobile motor,
It is characterized in that:
Signal processing circuit (2): receive the voltage signal of temperature transducer (1) output, export to control unit (3) after the processing; Described control unit (3) is connected between the input end of the output terminal of signal processing circuit (2) and cooling control circuit (6); The output terminal of a control setting circuit (9) is connected to the input end of control unit (3).
2, the temperature control circuit of car engine cooling system according to claim 1 is characterized in that, the output terminal of control unit (3) also connects a warning circuit (5).
3, the temperature control circuit of car engine cooling system according to claim 2 is characterized in that, the output terminal of control unit (3) also connects a display circuit (4).
4, the temperature control circuit of car engine cooling system according to claim 1; it is characterized in that; overvoltage crowbar (7) is by triode Q03, Q04; resistance R 05, R04 and voltage-stabiliser tube D04 form; automobile storage battery voltage is received the emitter of triode Q03 and Q04 by diode D06; the base stage of triode Q04 connects power supply negative terminal by resistance R 05 and the voltage-stabiliser tube D04 that is connected in series; the collector electrode of triode Q04 is connected with the base stage of triode Q03; and connecing power supply negative terminal by resistance R 04, the collector electrode of triode Q03 connects the input end of mu balanced circuit (8).
5, the temperature control circuit of car engine cooling system according to claim 1 is characterized in that, described cooling control circuit (6) comprises relay J, R06 and switch triode Q02 are insured in recovery certainly; The coil contact string of described relay J is between the collector electrode and positive supply of described switch triode Q02, and the emitter of switch triode Q02 connects the negative terminal of power supply, and the base stage of switch triode Q02 connects an output terminal of described control unit (3); The normally opened contact of described relay J, recover the two ends that insurance R06 and external refrigeration mechanism (11) are connected in series in automobile power source (10) certainly.
According to the temperature control circuit of claim 1 or 2 or 3 or 5 described car engine cooling systems, it is characterized in that 6, described control unit (3) is made up of single-chip microcomputer IC33 and peripheral circuit thereof.
7, the temperature control circuit of car engine cooling system according to claim 1, it is characterized in that, described control setting circuit (9) is by preset temperature switch W1, W2, electrical storage IC34, resistance R 326, R327 constitutes, insert the input/output port (P0.0) of single-chip microcomputer IC33 after wherein preset temperature switch W1 connects with resistance R 326, preset temperature switch W2 inserts one of single-chip microcomputer IC33 input/output port (P0.2) in addition at the back of connecting with resistance R 327, two input/output terminals of electrical storage IC34 respectively with two input/output port (P5.3 of single-chip microcomputer IC33, P5.4) connect.
According to the temperature control circuit of claim 1 or 2 or 3 or 5 described car engine cooling systems, it is characterized in that 8, described control unit (3) comprises A/D change-over circuit IC31 and peripheral circuit thereof.
9, the temperature control circuit of car engine cooling system according to claim 1, it is characterized in that, described control setting circuit (9) is made up of resistance R 31, R32, R33, R34, preset temperature potentiometer W, described resistance R 31, R32, R33, R34, potentiometer W are connected in series, simultaneously, the adjustable end of preset temperature potentiometer W is connected with the in-phase input end of voltage comparator ic 3-2, and the connected node of resistance R 32, R33 is connected with the inverting input of voltage comparator ic 3-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620110504 CN2913628Y (en) | 2006-04-30 | 2006-04-30 | Temperature control circuit for vehicle engine cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620110504 CN2913628Y (en) | 2006-04-30 | 2006-04-30 | Temperature control circuit for vehicle engine cooling system |
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| Publication Number | Publication Date |
|---|---|
| CN2913628Y true CN2913628Y (en) | 2007-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200620110504 Expired - Fee Related CN2913628Y (en) | 2006-04-30 | 2006-04-30 | Temperature control circuit for vehicle engine cooling system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691563A (en) * | 2012-06-04 | 2012-09-26 | 郑州精益达汽车零部件有限公司高新区分公司 | Intelligent fan controller |
| CN104912648A (en) * | 2015-04-25 | 2015-09-16 | 成都诚邦动力测试仪器有限公司 | High-sensitive water temperature detecting system for engine |
| CN105258810A (en) * | 2015-11-23 | 2016-01-20 | 成都科瑞信科技有限责任公司 | Novel temperature alarm system of eddy current retarder |
| CN105424203A (en) * | 2015-11-23 | 2016-03-23 | 成都科瑞信科技有限责任公司 | Eddy current retarder temperature alarm system based on grid coupling amplification circuit |
| CN105444902A (en) * | 2015-11-23 | 2016-03-30 | 成都科瑞信科技有限责任公司 | Eddy current retarder temperature alarm system based on filtering circuit |
| CN105444901A (en) * | 2015-11-23 | 2016-03-30 | 成都科瑞信科技有限责任公司 | Hybrid oscillation type eddy current retarder temperature alarm system based on coupling amplification |
| CN105466581A (en) * | 2015-11-23 | 2016-04-06 | 成都科瑞信科技有限责任公司 | Filtering-type electric eddy current retarder temperature alarm system based on coupling amplification |
| CN105486418A (en) * | 2015-11-23 | 2016-04-13 | 成都科瑞信科技有限责任公司 | Temperature alarm system of eddy current retarder based on voltage-constant driving |
| CN105486417A (en) * | 2015-11-23 | 2016-04-13 | 成都科瑞信科技有限责任公司 | Novel temperature alarm system of eddy current retarder based on constant current source |
| CN105509907A (en) * | 2015-11-23 | 2016-04-20 | 成都科瑞信科技有限责任公司 | Eddy current retarder temperature alarm system with high sensitivity |
| CN105909365A (en) * | 2016-06-06 | 2016-08-31 | 浙江理工大学 | Automatic cooling system of automobile engine |
| CN106472353A (en) * | 2016-10-12 | 2017-03-08 | 四川森迪科技发展股份有限公司 | A kind of temperature control system of the chicken son's couveuse based on overvoltage crowbar |
-
2006
- 2006-04-30 CN CN 200620110504 patent/CN2913628Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691563A (en) * | 2012-06-04 | 2012-09-26 | 郑州精益达汽车零部件有限公司高新区分公司 | Intelligent fan controller |
| CN104912648A (en) * | 2015-04-25 | 2015-09-16 | 成都诚邦动力测试仪器有限公司 | High-sensitive water temperature detecting system for engine |
| CN105258810A (en) * | 2015-11-23 | 2016-01-20 | 成都科瑞信科技有限责任公司 | Novel temperature alarm system of eddy current retarder |
| CN105424203A (en) * | 2015-11-23 | 2016-03-23 | 成都科瑞信科技有限责任公司 | Eddy current retarder temperature alarm system based on grid coupling amplification circuit |
| CN105444902A (en) * | 2015-11-23 | 2016-03-30 | 成都科瑞信科技有限责任公司 | Eddy current retarder temperature alarm system based on filtering circuit |
| CN105444901A (en) * | 2015-11-23 | 2016-03-30 | 成都科瑞信科技有限责任公司 | Hybrid oscillation type eddy current retarder temperature alarm system based on coupling amplification |
| CN105466581A (en) * | 2015-11-23 | 2016-04-06 | 成都科瑞信科技有限责任公司 | Filtering-type electric eddy current retarder temperature alarm system based on coupling amplification |
| CN105486418A (en) * | 2015-11-23 | 2016-04-13 | 成都科瑞信科技有限责任公司 | Temperature alarm system of eddy current retarder based on voltage-constant driving |
| CN105486417A (en) * | 2015-11-23 | 2016-04-13 | 成都科瑞信科技有限责任公司 | Novel temperature alarm system of eddy current retarder based on constant current source |
| CN105509907A (en) * | 2015-11-23 | 2016-04-20 | 成都科瑞信科技有限责任公司 | Eddy current retarder temperature alarm system with high sensitivity |
| CN105909365A (en) * | 2016-06-06 | 2016-08-31 | 浙江理工大学 | Automatic cooling system of automobile engine |
| CN106472353A (en) * | 2016-10-12 | 2017-03-08 | 四川森迪科技发展股份有限公司 | A kind of temperature control system of the chicken son's couveuse based on overvoltage crowbar |
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| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070620 Termination date: 20100430 |