CN102874070B - Cooling and heating central control device of public bus - Google Patents
Cooling and heating central control device of public bus Download PDFInfo
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- CN102874070B CN102874070B CN201210369006.7A CN201210369006A CN102874070B CN 102874070 B CN102874070 B CN 102874070B CN 201210369006 A CN201210369006 A CN 201210369006A CN 102874070 B CN102874070 B CN 102874070B
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- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a cooling and heating central control device of a public bus. The cooling and heating central control device is applicable to urban public buses with certain requirements on temperature regulation for air in the public buses and low-temperature protection for engines of the public buses. The cooling and heating central control device comprises an operation control circuit, a cooling control circuit and a heating control circuit; the operation control circuit, the cooling control circuit and the heating control circuit are connected with one another by a CAN (controller area network) bus; the operation control circuit comprises a first control circuit, a driving and displaying circuit and a keying circuit; the cooling control circuit comprises a first follower, a second control circuit, a first follow and fan driving circuit and a first driving circuit; and the heating control circuit comprises a second follower, a third control circuit, a second follow and fan driving circuit and a second driving circuit. The cooling and heating central control device has the advantages of good comfortableness and capability of realizing continuous temperature regulation for air in the public bus and low-temperature protection for an engine of the public bus.
Description
Technical field
The present invention relates to a kind of bus refrigeration, heat centralized controlling device, be applicable to have certain requirements urban bus to air temperature modification in bus, engine low temperature protection.
Background technology
In recent years along with government constantly increases the input of government utility, bus is as Name card of city, and its technical merit, also in continuous lifting, is never with heating combined equipment to band heating combined equipment, not only fridge equipment is not with, to being with heating combined equipment but also being with fridge equipment from band heating combined equipment; And be coupled to silicon oil clutch coupling as the radiator fan of engine radiating from direct-connected, then to adopting water temperature to control magnetic clutch coupling; The application of these devices and improvement improve the traveling comfort of vehicle ride and the low-temperature protection of driving engine.But these devices are all simple control separately separately at present, heating combined equipment can not realize level and smooth temperature and control, even can there are some to influence each other when each functional module is all enabled, can not system realize networking Based Intelligent Control according to factors such as air conditioning mode in Engine Coolant Temperature, vehicle interior temperature, the outer temperature of car, car, mainly there is problem:
(1) heating combined equipment is simple switch control rule, namely water pump and heater unit is opened by instrument desk rocker switch, be not with compartment temperature control system, hand switch water pump and heater unit can only be leaned on to control temperature in compartment, therefore, heater unit wind speed or can not regulate, can only divide into groups to close, high or the low or non-uniform temperature of compartment temperature often occurs thus causes passenger to complain, produce certain influence to traveling comfort, frequent operation rocker switch also has an impact to traffic safety.
(2) heating combined equipment can not retrain its switch according to Engine Coolant Temperature situation and control the speed of heater unit, such harm be exactly winter Engine Coolant Temperature do not warm up heater unit and just open, driving engine just can not be made to be rapidly heated and to reach optimum operation temperature; Engine water circulating system heat major part is distributed in compartment simultaneously, make temperature in compartment too high, and the water temperature of driving engine own does not reach optimum operation temperature, cause driving engine to run under non-optimal water temperature for a long time, engine life and compartment traveling comfort are had an impact.
(3) fridge equipment effector, water pump, heater unit all adopt independently control system; do not associate control each other; in driver's maloperation or when forgetting a certain function of closedown; when often can hold refrigeration, heater unit and water pump are also in work; when closedown heats, water pump forgets cut out; impact to compartment traveling comfort and water pump life-span; particularly in summer; when heating control water circulation system total valve and closing; maloperation opens water pump, likely causes the explosion of engine water circulating system pipe.
Summary of the invention
The present invention is directed to above problems of the prior art and propose a kind of traveling comfort good, can solve air themperature in bus regulate continuously and engine low temperature protection bus refrigeration, heat centralized controlling device.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of bus refrigeration, heat centralized controlling device, it is characterized in that it is by operation control circuit, refrigeration control circuit with heat control circuit and form; Described operation control circuit, refrigeration control circuit, heat control circuit and connected by CAN; Described operation control circuit is made up of first control circuit, driving and display circuit and key circuit; Described first control circuit is connected with CAN, and first control circuit and driving and display circuit are bi-directionally connected; The output termination driving of described key circuit and the respective input of display circuit;
Described refrigeration control circuit is followed by the first follower, second control circuit, first and fan drive circuit and the first driving circuit form; The input end of described first follower connects the mouth of refrigerant transducer in the outer mouth of temperature sensor of car, the mouth of the A/C evaporator temperature sensor of bus, car respectively, the input end of the output termination second control circuit of the first follower; Described second control circuit is connected with CAN, and its two-way mouth connects first respectively and follows and the input end of fan drive circuit and the input end of the first driving circuit; The mouth of described first driving circuit connects the control end of air conditioner condensation blower fan and the control end of evaporation fan of bus respectively; Described first follows and the mouth of fan drive circuit connects the control end of air conditioner condensation blower fan and the control end of evaporation fan of bus respectively; The mouth of described first driving circuit connects the control end of the compressor clutch of bus respectively and heats the control end of the engine radiating heat radiation fan clutch controlling water circulation;
The described control circuit that heats is followed by the second follower, the 3rd control circuit, second and fan drive circuit and the second driving circuit form; The mouth of temperature sensor is heated, the input end of output termination the 3rd control circuit of the second follower in the input termination car of described second follower; Described 3rd control circuit is connected with CAN, and its two-way mouth connects second respectively and follows and the input end of fan drive circuit and the input end of the second driving circuit; Described second follow and fan drive circuit output termination car in the control end of heater unit; The mouth of described second driving circuit connects the control end of water pump in car respectively and heats the control end of the engine cooling fan power-transfer clutch controlling water circulation.
Beneficial effect of the present invention is as follows:
(1) rocker switch of heater unit and water pump control is eliminated, refrigeration control controls employing operation control circuit (hereinafter referred to as operational module) control with heating, make operation easier, when opening the maloperation heating control when efficiently solving refrigeration control and heat closedown, water pump forgets the situation of cut out.
(2) perfect control is heated, add heater unit, water pump etc. and heat load, heat the opening and closing controlling to realize step-less adjustment heater unit speed and control water pump in 0% ~ 100% scope according to the vehicle interior temperature gathered, temperature in compartment is made to become the control of automatic smoothing from manually unstable control, the noise that heater unit high-speed operation produces have also been obtained effective containment, and the traveling comfort taken is greatly improved.
(3) operate control, refrigeration control, heat control by CAN communication networking, maximum range realizes information sharing and exchange, makes the communication between each module and controls to control to an organically composition network from what disperse, realizing Based Intelligent Control.
(4) eliminate heat radiation fan clutch carry cooling-water temperature sensor and control external member, by refrigeration control, heat the while of control from the water temperature message that car load CAN reception Engine ECU sends, and control engine cooling fan power-transfer clutch by heating control circuit, forbid when Engine Coolant Temperature is below 60 DEG C heating and control to open, when Engine Coolant Temperature more than 86 DEG C, control the adhesive of engine cooling fan power-transfer clutch, by the communication of CAN, driving engine is worked at optimum operation temperature, and actv. ensure that the service life of driving engine.
(5) the outer temperature of car is gathered by refrigeration control, control unlatching is heated invalid when the outer temperature of car is more than 20 DEG C, when Engine Coolant Temperature has just reached 65 DEG C while heating (can open), people is made to feel colder for preventing the wind of producing by boasting, take first 20% heater unit wind speed and run 5 minutes, after waiting for that water temperature rises further, then heater unit is risen to wind speed setting, make operation control hommization more also safer.
(6) refrigeration control has backed up engine cooling fan clutch control function, when heating control inefficacy or water temperature message dropping, refrigeration control can take over rapidly heat control make fan clutch close, fan clutch is as the critical component of impact driving, adopt two ore control, the supportability of control system is obviously strengthened.
Accompanying drawing explanation
Fig. 1 is functional block diagram of the present invention;
Fig. 2 is the schematic circuit diagram of operation control circuit of the present invention;
Fig. 3 is the schematic circuit diagram of refrigeration control circuit of the present invention;
Fig. 4 is the schematic circuit diagram heating control circuit of the present invention;
In figures 1-4,4 is heater unit, and 5 is water pump, and 6 is fan clutch, 7 heat temperature sensor in car, 8 is CAN, and 9 is the outer temperature sensor of car, and 10 is evaporator temperature sensor, 11 is cryogenic temperature sensor in car, 12 is compressor clutch, and 13 is condensation fan, and 14 is evaporation fan.
Detailed description of the invention
By the known the present embodiment of accompanying drawing 1-4 by operation control circuit 1, refrigeration control circuit 2(hereinafter referred to as refrigeration module) and heat control circuit 3(hereinafter referred to as heating module) form; Described operation control circuit 1, refrigeration control circuit 2, heat control circuit 3 and connected by CAN 8; Described operation control circuit 1 is made up of first control circuit, driving and display circuit and key circuit; Described first control circuit is connected with CAN 8, and first control circuit and driving and display circuit are bi-directionally connected; The output termination driving of described key circuit and the respective input of display circuit;
Described refrigeration control circuit 2 is followed by the first follower, second control circuit, first and fan drive circuit and the first driving circuit form; The input end of described first follower connects the mouth of refrigerant transducer 11 in the outer mouth of temperature sensor 9 of car, the mouth of the A/C evaporator temperature sensor 10 of bus, car respectively, the input end of the output termination second control circuit of the first follower; Described second control circuit is connected with CAN 8, and its two-way mouth connects first respectively and follows and the input end of fan drive circuit and the input end of the first driving circuit; Described first follows and the mouth of fan drive circuit connects the control end of the air conditioner condensation blower fan 13 of bus and the control end of evaporation fan 14 respectively; The mouth of described first driving circuit connects the control end of the compressor clutch 12 of bus respectively and heats the control end of the engine cooling fan power-transfer clutch 6 controlling water circulation;
The described control circuit 3 that heats is followed by the second follower, the 3rd control circuit, second and fan drive circuit and the second driving circuit form; The mouth of temperature sensor 7 is heated, the input end of output termination the 3rd control circuit of the second follower in the input termination car of described second follower; Described 3rd control circuit is connected with CAN 8, and its two-way mouth connects second respectively and follows and the input end of fan drive circuit and the input end of the second driving circuit; Described second follow and fan drive circuit output termination car in the control end of heater unit 4; The mouth of described second driving circuit connects the control end of water pump 5 in car and the control end of engine cooling fan power-transfer clutch 6 respectively.
Described first control circuit is made up of micro controller system IC1 and bus transceiving chip IC2; The model of described micro controller system IC1 is NUC140RE3CN, and its 25-26 pin connects 4 pin, 1 pin of bus transceiving chip IC2 respectively; The model of described bus transceiving chip IC2 is TJA1040, and its 6-7 pin connects CAN 8, its 8 pin ground connection;
Described driving and display circuit are made up of display driver chip IC3 and read-out IC4; The model of described display driver chip IC3 is TM1628, and its 2-4 pin connects the 34-32 pin of micro controller system IC1 respectively, and the 8-20 pin of display driver chip IC3,23-24 pin, 26-27 pin connect the respective input of read-out IC4 respectively; The model of described read-out IC4 is 4301AS-3.
Described key circuit is made up of button S1-S6; One end of described button S1, button S3, button S5 all connects 6 pin of display driver chip IC3, one end of described button S2, button S4, button S6 all connects 5 pin of display driver chip IC3,8 pin of another termination display driver chip IC3 of button S1, the other end of button S2, button S3 all connects 9 pin of display driver chip IC3, the other end of button S4, button S5 all connects 10 pin of display driver chip IC3, and the other end of button S6 all connects 11 pin of display driver chip IC3.
Described first follower is made up of the branch road that three line structures are identical; Wherein first route voltage follower IC7A and peripheral cell resistance R1-R2 thereof forms; The model of described voltage follower IC7A is that the model of below LM339(voltage follower and comparator is LM339), its in-phase input end connects the mouth of refrigerant transducer 11 in car through resistance R2, and described resistance R1 is connected between the mouth of refrigerant transducer 11 in+5V and car; Wherein second route voltage follower IC7B and peripheral cell resistance R3-R4 thereof forms; Wherein the 3rd route voltage follower IC7C and peripheral cell resistance R5-R6 thereof forms;
Described second control circuit is made up of micro controller system IC5 and bus transceiving chip IC6; The model of described micro controller system IC5 is NUC140RE3CN, and its input end 46-48 pin connects the mouth of voltage follower IC7A-IC7C respectively, and its 25-26 pin connects 4 pin, 1 pin of bus transceiving chip IC6 respectively; Described bus transceiving chip IC6 model be TJA1040, its 6-7 pin connects CAN 8, its 8 pin ground connection;
Described first follows and fan drive circuit is made up of the branch road that two line structures are identical; Wherein first route voltage follower IC7D, comparator IC8A, comparator IC10A, field effect transistor VT(N channel field-effect pipe) 3, resistance R8-R12, resistance R39-R46 and electric capacity C1-C2, electric capacity C7-C8 form; The in-phase input end of described voltage follower IC7D connects mouth 40 pin of micro controller system IC5 successively through resistance R7, resistance R8, the mouth of voltage follower IC7D connects the in-phase input end of comparator IC8A through resistance R9; Between the node that described electric capacity C1 is connected on resistance R7 and resistance R8 and ground; The inverting input of described comparator IC8A connects the mouth of comparator IC10A successively through electric capacity C8, resistance R44, the mouth of comparator IC8A connects the grid G of field effect transistor VT3 through resistance R11; Between the in-phase input end that described resistance R10 is connected on comparator IC8A and ground; Between the inverting input that described resistance R46 is connected on comparator IC8A and ground; Be connected between+12V and ground after described resistance R41 connects with resistance R45; The in-phase input end of described comparator IC10A is through the Node B of resistance R42 connecting resistance R41 and resistance R45, the mouth of comparator IC10A meets+12V through resistance R39, resistance R40 is connected between the mouth of comparator IC10A and described B point, between the inverting input that resistance R44 is connected on comparator IC10A after connecting with electric capacity C7 and ground, resistance R43 is connected with the node of electric capacity C8 with resistance R44 with the node of electric capacity C7; The source S of described field effect transistor VT3 is through resistance R12 ground connection, and its drain D connects the control end of described evaporation fan (14); Power end one tunnel of described evaporation fan (14) meets+24V, and another road is through electric capacity C2 ground connection; Wherein second route voltage follower IC8B, comparator IC8C, comparator IC10B, field effect transistor VT4(N channel field-effect pipe), resistance R13-R18, resistance R47-R54 and electric capacity C1-C2, electric capacity C9-C10 form;
Described first driving circuit is made up of two-way branch road; Wherein first route aerotron T1, field effect transistor VT1(P channel field-effect pipe) and resistance R19-R21 form; The base stage of described aerotron T1 connects mouth 34 pin of micro controller system IC5, its grounded emitter through resistance R19, its collecting electrode connects the grid G of field effect transistor VT1 through resistance R20; The source S of described field effect transistor VT1 meets+24V, and its drain D connects the control end of described compressor clutch 12; Described resistance R21 is connected between the grid G of field effect transistor VT1 and+24V; Wherein second route aerotron T2, field effect transistor VT2(P channel field-effect pipe), diode D1 and resistance R22-R24 forms, the second branch road is as the standby control circuit of described fan clutch 6; The base stage of described aerotron T2 connects mouth 33 pin of micro controller system IC5, its grounded emitter through resistance R22, its collecting electrode connects the grid G of field effect transistor VT1 through resistance R23; The source S of described field effect transistor VT2 meets+24V, and its drain D connects the anode of diode D1; The negative electrode of described diode D1 is output terminals A end; Described resistance R24 is connected between the grid G of field effect transistor VT2 and+24V.
Described second follower is made up of voltage follower IC9A and peripheral cell resistance R25-R26 thereof; The in-phase input end of described voltage follower IC9A connects in car through resistance R26 the mouth heating temperature sensor 7; Described resistance R25 be connected on heat temperature sensor 7 in+5V and car mouth between;
Described 3rd control circuit is made up of micro controller system IC10 and bus transceiving chip IC11; The model of described micro controller system IC10 is NUC140RE3CN, and its input end 48 pin connects the mouth of voltage follower IC9A, and its 25-26 pin connects 4 pin, 1 pin of bus transceiving chip IC11 respectively; The model of described bus transceiving chip IC11 is TJA1040, and its 6-7 pin connects CAN 8, its 8 pin ground connection;
Described second follow and fan drive circuit by voltage follower IC9B, comparator IC9C, comparator IC10C, field effect transistor VT5(N channel field-effect pipe), resistance R27-R32, resistance R55-R62 and electric capacity C5-C6, electric capacity C11-C12 form; The in-phase input end of described voltage follower IC9B connects mouth 40 pin of micro controller system IC10 successively through resistance R28, resistance R27, the mouth of voltage follower IC9B connects the in-phase input end of comparator IC9C through resistance R29; Between the node that described electric capacity C6 is connected on resistance R27 and resistance R28 and ground; The inverting input of described comparator IC9C connects the mouth of comparator IC10C successively through electric capacity C12, resistance R61, the mouth of comparator IC9C connects the grid G of field effect transistor VT3 through resistance R31; Between the in-phase input end that described resistance R30 is connected on comparator IC9C and ground; Between the inverting input that described resistance R62 is connected on comparator IC9C and ground; Be connected between+12V and ground after described resistance R56 connects with resistance R60; The in-phase input end of described comparator IC10C is through the node E of resistance R58 connecting resistance R56 and resistance R60, the mouth of comparator IC10C meets+12V through resistance R55, resistance R57 is connected between the mouth of comparator IC10C and described E point, between the inverting input that resistance R59 is connected on comparator IC10C after connecting with electric capacity C11 and ground, resistance R59 is connected with the node of electric capacity C12 with resistance R61 with the node of electric capacity C11; The source S of described field effect transistor VT5 is through resistance R32 ground connection, and its drain D connects the control end of described heater unit (4); Power end one tunnel of described heater unit (4) meets+24V, and another road is through electric capacity C5 ground connection;
Described second driving circuit is made up of two-way branch road; Wherein first route aerotron T3, field effect transistor VT6(P channel field-effect pipe) and resistance R33-R35 form; The base stage of described aerotron T3 connects mouth 34 pin of micro controller system IC10, its grounded emitter through resistance R33, its collecting electrode connects the grid G of field effect transistor VT6 through resistance R34; The source S of described field effect transistor VT6 meets+24V, and its drain D connects the control end of described water pump 5; Described resistance R35 is connected between the grid G of field effect transistor VT6 and+24V; Wherein second route aerotron T4, field effect transistor VT7(P channel field-effect pipe), diode D2 and resistance R36-R38 forms; The base stage of described aerotron T4 connects mouth 33 pin of micro controller system IC10, its grounded emitter through resistance R36, its collecting electrode connects the grid G of field effect transistor VT7 through resistance R37; The source S of described field effect transistor VT7 meets+24V, and its drain D connects the anode of diode D2; Negative electrode one tunnel of described diode D2 meets described A and holds, the control end of fan clutch 6 described in another termination; Described resistance R38 is connected between the grid G of field effect transistor VT7 and+24V.
Button S1 is ADD key, and button S2 is SUB key, and button S3 is MODE key, and button S4 is FAN key, and button S5 is OFF key, and button S6 is ON key.
The working process of the present embodiment is as follows:
Operation control circuit 1, the refrigeration control circuit 2 of the present embodiment and heat control circuit 3 and have employed the CAN Communication Control mode meeting SAE J1939 agreement, the command operating between 3 modules and control all to be completed by CAN.
Operational module is as the man-machine interface of whole control setup, various switching on and shutting down, refrigeration or heating mode are selected, temperature sets, each blower fan wind speed size is arranged etc. passes through operation push-button, serial date transfer is converted to micro controller system IC1 by display driver chip IC3, the serial button data of reception is converted into the CAN message meeting SAE J1939 communications protocol by micro controller system IC1, is sent to refrigeration module, heating module by bus transceiving chip IC2 timing; Heat the CAN messages such as temperature, refrigeration or heating mode by cryogenic temperature, evaporator temperature, car in the car of refrigeration module, heating module timed sending in temperature, car from the reception of car load bus by bus transceiving chip IC2 simultaneously, be treated to serial date transfer display driver chip IC3 the 2nd pin by micro controller system IC1, drive read-out IC4 by display driver chip IC3 and show.The operation such as refrigeration or heating mode selection, the setting of wind speed size, temperature setting all concentrates on operational module, and refrigeration or heating mode are switched by MODE key continuous key-press; After start, press MODE key and once select refrigeration mode, then press MODE key and once jump to heating mode from refrigeration mode, whenever all only have a kind of pattern available.Select to send the messages such as start, temperature setting, wind speed setting by CAN 8 to refrigeration module by operational module during refrigeration mode, send shutdown message to heating module simultaneously; Select to send start by CAN 8 to heating module by operational module during heating mode, temperature sets, wind speed sets message, send shutdown message to refrigeration module simultaneously, so both ensure that the easy of operation, also eliminate cause due to maloperation not only open refrigeration but also open situation about heating.
Refrigeration module is mainly born refrigeration control, heat radiation fan clutch control for subsequent use, is received the function such as the water temperature message of Engine ECU transmission, the detection of heating module mode of operation.The principle of work of refrigeration module is as follows:
(1) vehicle interior temperature during refrigeration is input on the A/D mouth (48 pin of micro controller system IC5) of micro controller system IC5 by resistance R2 and voltage follower IC7A by the bleeder circuit be made up of refrigeration vehicle interior temperature sensor 11 and resistance R1, by the process of micro controller system IC5, vehicle interior temperature is converted into digital signal by analog signal, control for refrigeration module internal logic, then send temperature message by CAN 8 to operational module by bus transceiving chip IC6, by operational module, temperature message is converted into displayable numerical value, (2) bleeder circuit be made up of evaporator temperature sensor 10 and resistance R3 is input on the A/D mouth (i.e. 47 pin of micro controller system IC5) of micro controller system IC5 by resistance R4 and voltage follower IC7B, evaporator temperature is transferred to digital signal by analog signal by the process of micro controller system IC5, whether frosting is (when evaporator temperature sensor 10 detects that temperature is below zero to detect evaporator surface during for freezing, evaporator surface frosting is described, then close compressor power-transfer clutch 12), then temperature message is sent by bus transceiving chip IC6 to operational module, by operational module, evaporator temperature is converted into displayable numerical value, (3) bleeder circuit be made up of the outer temperature sensor 9 of car and resistance R5 is input on the A/D mouth (i.e. 46 pin of micro controller system IC5) of micro controller system IC5 by resistance R6 and voltage follower IC7C, outer for car temperature is transferred to digital signal by analog signal by the process of micro controller system IC5, temperature message is sent to operational module and heating module by bus transceiving chip IC6, outer for the car of reception temperature message is converted into the numerical value that can for show by operational module, and heating module receives the outer temperature message of car and is used for judging whether that unlatching heats control, (4) received the speed governing message of the evaporation fan 14 that operational module sends from CAN 8 by bus transceiving chip IC6, the output pulse of the PWM port (i.e. 40 pin of micro controller system IC5) of IC5 is converted into, through to follow and driving circuit (i.e. the first branch road) controls the speed of evaporation fan 14 by the process of micro controller system IC5, (5) voltage signal of the outer temperature sensor 9 of car that will gather of micro controller system IC5, is converted into the output pulse of PWM port (i.e. 39 pin of micro controller system IC5), through to follow and driving circuit (i.e. the second branch road) controls the speed of condensation fan 13, (6) when 34 pin of micro controller system IC5 export high potential, aerotron T1 saturation conduction, make field effect transistor VT1 also saturation conduction by resistance R20 ,+24V voltage is added on compressor clutch 12, makes it close, (7) when 33 pin of micro controller system IC5 export high potential, aerotron T2 saturation conduction, makes field effect transistor VT2 also saturation conduction by resistance R23, and diode D1 conducting exports high potential, and this circuit is as the standby control circuit of fan clutch 6.
Refrigeration module fan clutch 6 control process for subsequent use is: (1) refrigeration module, heating module all receive from CAN 8 the water temperature message that Engine ECU sends with the forms of broadcasting, a frame mode of operation and water temperature confirmation message is sent through CAN 8 to refrigeration module after heating module receives water temperature message, refrigeration module can receive the confirmation message that heating module sends, prove that heating module is working properly and have received water temperature message, the now control of fan clutch 6 is completed by heating module, (2) when refrigeration module does not receive the message that heating module sends or the message only receiving mode of operation, then show that heating module inefficacy can not send message or not receive the water temperature message of Engine ECU transmission, now heating module can not control the closed of fan clutch 6, then fan clutch 6 is transferred to refrigeration module to control, refrigeration module is according to the Engine Coolant Temperature message received, export high potential when water temperature more than 86 DEG C by the standby control circuit of fan clutch 6 and control fan clutch 6 adhesive, then exporting active potential when Engine Coolant Temperature is below 80 DEG C makes fan clutch 6 disconnect, (3) when refrigeration module does not receive the water temperature confirmation message of heating module transmission and itself do not receive water temperature message yet, then show that the water temperature message that now Engine ECU sends breaks down, now refrigeration module makes fan clutch 6 force adhesive by the standby control circuit output high potential of fan clutch 6, meet vehicle driving requirements, by the control of above-mentioned (1), (2), (3), the Control for Dependability of engine cooling fan power-transfer clutch 6 is greatly improved.
Heating module is responsible for centralized controlling device and is heated and the closed of engine cooling fan power-transfer clutch 6 and disconnection.Principle of work and the work process of heating module are as follows:
One, (1) is input to the A/D(of micro controller system IC10 and 48 pin of micro controller system IC10 by heating the bleeder circuit that temperature sensor 7 and resistance R25 form in car by resistance R26 and voltage follower IC9A) on mouth, by the process of micro controller system IC10, vehicle interior temperature is converted into digital signal by analog signal, control for heating module internal logic, then send vehicle interior temperature signal by CAN 8 to operational module by bus transceiving chip IC11, be translated into displayable numerical value by operational module; (2) received the speed governing message of the heater unit 4 that operational module sends from CAN 8 by bus transceiving chip IC11, the output pulse of PWM port (i.e. 40 pin of micro controller system IC10) is converted into, through to follow and driving circuit controls the speed of heater unit 4 by the process of micro controller system IC10; (3) when 34 pin of micro controller system IC10 export high potential, aerotron T3 saturation conduction, make field effect transistor VT6 also saturation conduction by resistance R34 ,+24V voltage is added on water pump 5, makes it run; (4) when 33 pin of micro controller system IC10 export high potential, aerotron T4 saturation conduction, make field effect transistor VT7 also saturation conduction by resistance R37 ,+24V voltage is added on fan clutch 6 through diode D2, makes it close;
Two, heating module control process is: the start that heating module receives from CAN 8 water temperature message that Engine ECU sends with the forms of broadcasting, operational module sends, heat temperature setting, heater unit 4 speed regulates message, from temperature message the car that refrigeration module receives, when meeting 1. when the outer temperature message of the car received is no more than 20 DEG C, 2. when Engine Coolant Temperature message is more than 65 DEG C, 3. operational module send heat design temperature message than heat vehicle interior temperature sensor 7 respond to temperature high, during this three conditions, the PWM waveform of 20% dutycycle is exported by 40 pin of micro controller system IC10, heater unit 4 is run with 20% of setting speed, 34 pin of micro controller system IC10 export high potential and make aerotron T3 saturation conduction simultaneously, field effect transistor VT6 also saturation conduction is made by resistance R34, + 24V voltage is added on water pump 5, make it operate, now because Engine Coolant Temperature has just reached 65 DEG C, the wind of producing by boasting is not also too hot, allow the slowly preheating of heater unit 4 low-speed running, by the timing sequence of micro controller system IC10, after 5 minutes, Engine Coolant Temperature is more than after 65 DEG C of certain numerical value, now allow heater unit 4 with setting speed high-speed operation, vehicle interior temperature is raised rapidly, when heat in car temperature that temperature sensor 7 responds to be close to differ from 2 DEG C with design temperature time, heater unit is allowed to run with 40% of setting speed, vehicle interior temperature continues to rise, vehicle interior temperature is more close to design temperature, the speed of heater unit 4, more close to zero, namely controls vehicle interior temperature more slower close to the speed of heater unit 4 during target setting temperature, then closes heater unit 4 and water pump 5 when arriving target setting temperature, control to make the temperature in compartment control to become more level and smooth by this, traveling comfort is greatly improved.The outer temperature of car, to the restriction heating unlatching, eliminates and water pump 5 is worked the injury caused driving engine water circuit system not needing to open the weather that heats because of maloperation.
The principle of work of engine low temperature protection is as follows: 1. when the water temperature message that the Engine ECU that heating module receives sends is lower than 60 DEG C, do not allow to heat unlatching, 2. when the water temperature message that the Engine ECU that heating module receives sends is lower than 80 DEG C, fan clutch 6 not adhesive, 3. operational module setting heats range of temperatures 16 DEG C ~ 30 DEG C, the setting of these modes, when making low temperature, heating module is postponed unlatching and can be allowed driving engine rapid temperature increases, after heating unlatching, fan clutch 6 adhesive when Engine Coolant Temperature reaches optimum temperature 85 DEG C, operational module constraint temperature is in certain scope, prevent temperature setting in compartment too high, too many heat of engine is taken when heating, Engine Coolant Temperature is always hovered between 60 DEG C ~ 70 DEG C, cause fan clutch 6 not adhesive all the time, driving engine is not run for a long time under optimum temperature, therefore engine low temperature protection is made effectively to be strengthened, extend engine life, make the temperature in compartment control also more level and smooth simultaneously, travelling comfort is greatly improved.
Claims (4)
1. bus refrigeration, heat a centralized controlling device, it is characterized in that it is by operation control circuit (1), refrigeration control circuit (2) with heat control circuit (3) and form; Described operation control circuit (1), refrigeration control circuit (2), heat control circuit (3) and connected by CAN (8); Described operation control circuit (1) is made up of first control circuit, driving and display circuit and key circuit; Described first control circuit is connected with CAN (8), and first control circuit and driving and display circuit are bi-directionally connected; The output termination driving of described key circuit and the respective input of display circuit;
Described refrigeration control circuit (2) is followed by the first follower, second control circuit, first and fan drive circuit and the first driving circuit form; The input end of described first follower connects the mouth of refrigerant transducer (11) in the outer mouth of temperature sensor (9) of car, the mouth of the A/C evaporator temperature sensor (10) of bus, car respectively, the input end of the output termination second control circuit of the first follower; Described second control circuit is connected with CAN (8), and its two-way mouth connects first respectively and follows and the input end of fan drive circuit and the input end of the first driving circuit; Described first follows and the mouth of fan drive circuit connects the control end of the air conditioner condensation blower fan (13) of bus and the control end of evaporation fan (14) respectively; The mouth of described first driving circuit connects the control end of the compressor clutch (12) of bus respectively and heats the control end of the engine cooling fan power-transfer clutch (6) controlling water circulation;
The described control circuit (3) that heats is followed by the second follower, the 3rd control circuit, second and fan drive circuit and the second driving circuit form; The mouth of temperature sensor (7) is heated, the input end of output termination the 3rd control circuit of the second follower in the input termination car of described second follower; Described 3rd control circuit is connected with CAN (8), and its two-way mouth connects second respectively and follows and the input end of fan drive circuit and the input end of the second driving circuit; Described second follow and fan drive circuit output termination car in the control end of heater unit (4); The mouth of described second driving circuit connects the control end of water pump in car (5) and the control end of described fan clutch (6) respectively.
2. bus according to claim 1 freezes, heats centralized controlling device, it is characterized in that described first control circuit is made up of micro controller system IC1 and bus transceiving chip IC2; The 25-26 pin of described micro controller system IC1 connects 4 pin, 1 pin of bus transceiving chip IC2 respectively; The 6-7 pin of described bus transceiving chip IC2 connects CAN (8), its 8 pin ground connection;
Described driving and display circuit are made up of display driver chip IC3 and read-out IC4; The 2-4 pin of described display driver chip IC3 connects the 34-32 pin of micro controller system IC1 respectively, and the 8-20 pin of display driver chip IC3,23-24 pin, 26-27 pin connect the respective input of read-out IC4 respectively;
Described key circuit is made up of button S1-S6; One end of described button S1, button S3, button S5 all connects 6 pin of display driver chip IC3, one end of described button S2, button S4, button S6 all connects 5 pin of display driver chip IC3,8 pin of another termination display driver chip IC3 of button S1, the other end of button S2, button S3 all connects 9 pin of display driver chip IC3, the other end of button S4, button S5 all connects 10 pin of display driver chip IC3, and the other end of button S6 all connects 11 pin of display driver chip IC3.
3. bus according to claim 2 freezes, heats centralized controlling device, it is characterized in that described first follower is made up of the branch road that three line structures are identical; Wherein first route voltage follower IC7A and peripheral cell resistance R1-R2 thereof forms; The in-phase input end of described voltage follower IC7A connects the mouth of refrigerant transducer in car (11) through resistance R2, described resistance R1 is connected between the mouth of refrigerant transducer (11) in+5V and car; Wherein second route voltage follower IC7B and peripheral cell resistance R3-R4 thereof forms; Wherein the 3rd route voltage follower IC7C and peripheral cell resistance R5-R6 thereof forms;
Described second control circuit is made up of micro controller system IC5 and bus transceiving chip IC6; The input end 46-48 pin of described micro controller system IC5 connects the mouth of voltage follower IC7C-IC7A respectively, and its 25-26 pin connects 4 pin, 1 pin of bus transceiving chip IC6 respectively; The 6-7 pin of described bus transceiving chip IC6 connects CAN (8), its 8 pin ground connection;
Described first follows and fan drive circuit is made up of the branch road that two line structures are identical; Wherein first route voltage follower IC7D, comparator IC8A, comparator IC10A, field effect transistor VT3, resistance R8-R12, resistance R39-R46 and electric capacity C1-C2, electric capacity C7-C8 form; The in-phase input end of described voltage follower IC7D connects mouth 40 pin of micro controller system IC5 successively through resistance R7, resistance R8, the mouth of voltage follower IC7D connects the in-phase input end of comparator IC8A through resistance R9; Between the node that described electric capacity C1 is connected on resistance R7 and resistance R8 and ground; The inverting input of described comparator IC8A connects the mouth of comparator IC10A successively through electric capacity C8, resistance R44, the mouth of comparator IC8A connects the grid G of field effect transistor VT3 through resistance R11; Between the in-phase input end that described resistance R10 is connected on comparator IC8A and ground; Between the inverting input that described resistance R46 is connected on comparator IC8A and ground; Be connected between+12V and ground after described resistance R41 connects with resistance R45; The in-phase input end of described comparator IC10A is through the Node B of resistance R42 connecting resistance R41 and resistance R45, the mouth of comparator IC10A meets+12V through resistance R39, resistance R40 is connected between the mouth of comparator IC10A and described B point, between the inverting input that resistance R44 is connected on comparator IC10A after connecting with electric capacity C7 and ground, resistance R43 is connected with the node of electric capacity C8 with resistance R44 with the node of electric capacity C7; The source S of described field effect transistor VT3 is through resistance R12 ground connection, and its drain D connects the control end of described evaporation fan (14); Power end one tunnel of described evaporation fan (14) meets+24V, and another road is through electric capacity C2 ground connection; Wherein second route voltage follower IC8B, comparator IC8C, comparator IC10B, field effect transistor VT4, resistance R13-R18, resistance R47-R54 and electric capacity C1-C2, electric capacity C9-C10 form;
Described first driving circuit is made up of two-way branch road; Wherein first route aerotron T1, field effect transistor VT1 and resistance R19-R21 form; The base stage of described aerotron T1 connects mouth 34 pin of micro controller system IC5, its grounded emitter through resistance R19, its collecting electrode connects the grid G of field effect transistor VT1 through resistance R20; The source S of described field effect transistor VT1 meets+24V, and its drain D connects the control end of described compressor clutch (12); Described resistance R21 is connected between the grid G of field effect transistor VT1 and+24V; Wherein second route aerotron T2, field effect transistor VT2, diode D1 and resistance R22-R24 form; The base stage of described aerotron T2 connects mouth 33 pin of micro controller system IC5, its grounded emitter through resistance R22, its collecting electrode connects the grid G of field effect transistor VT1 through resistance R23; The source S of described field effect transistor VT2 meets+24V, and its drain D connects the anode of diode D1; The negative electrode of described diode D1 is output terminals A end; Described resistance R24 is connected between the grid G of field effect transistor VT2 and+24V.
4. bus according to claim 3 freezes, heats centralized controlling device, it is characterized in that described second follower is made up of voltage follower IC9A and peripheral cell resistance R25-R26 thereof; The in-phase input end of described voltage follower IC9A connects in car through resistance R26 the mouth heating temperature sensor (7); Described resistance R25 be connected on heat temperature sensor (7) in+5V and car mouth between;
Described 3rd control circuit is made up of micro controller system IC10 and bus transceiving chip IC11; Input end 48 pin of described micro controller system IC10 connects the mouth of voltage follower IC9A, and its 25-26 pin connects 4 pin, 1 pin of bus transceiving chip IC11 respectively; The 6-7 pin of described bus transceiving chip IC11 connects CAN (8), its 8 pin ground connection;
Described second follows and fan drive circuit is made up of voltage follower IC9B, comparator IC9C, comparator IC10C, field effect transistor VT5, resistance R27-R32, resistance R55-R62 and electric capacity C5-C6, electric capacity C11-C12; The in-phase input end of described voltage follower IC9B connects mouth 40 pin of micro controller system IC10 successively through resistance R28, resistance R27, the mouth of voltage follower IC9B connects the in-phase input end of comparator IC9C through resistance R29; Between the node that described electric capacity C6 is connected on resistance R27 and resistance R28 and ground; The inverting input of described comparator IC9C connects the mouth of comparator IC10C successively through electric capacity C12, resistance R61, the mouth of comparator IC9C connects the grid G of field effect transistor VT3 through resistance R31; Between the in-phase input end that described resistance R30 is connected on comparator IC9C and ground; Between the inverting input that described resistance R62 is connected on comparator IC9C and ground; Be connected between+12V and ground after described resistance R56 connects with resistance R60; The in-phase input end of described comparator IC10C is through the node E of resistance R58 connecting resistance R56 and resistance R60, the mouth of comparator IC10C meets+12V through resistance R55, resistance R57 is connected between the mouth of comparator IC10C and described E point, between the inverting input that resistance R59 is connected on comparator IC10C after connecting with electric capacity C11 and ground, resistance R59 is connected with the node of electric capacity C12 with resistance R61 with the node of electric capacity C11; The source S of described field effect transistor VT5 is through resistance R32 ground connection, and its drain D connects the control end of described heater unit (4); Power end one tunnel of described heater unit (4) meets+24V, and another road is through electric capacity C5 ground connection;
Described second driving circuit is made up of two-way branch road; Wherein first route aerotron T3, field effect transistor VT6 and resistance R33-R35 form; The base stage of described aerotron T3 connects mouth 34 pin of micro controller system IC10, its grounded emitter through resistance R33, its collecting electrode connects the grid G of field effect transistor VT6 through resistance R34; The source S of described field effect transistor VT6 meets+24V, and its drain D connects the control end of described water pump (5); Described resistance R35 is connected between the grid G of field effect transistor VT6 and+24V; Wherein second route aerotron T4, field effect transistor VT7, diode D2 and resistance R36-R38 form; The base stage of described aerotron T4 connects mouth 33 pin of micro controller system IC10, its grounded emitter through resistance R36, its collecting electrode connects the grid G of field effect transistor VT7 through resistance R37; The source S of described field effect transistor VT7 meets+24V, and its drain D connects the anode of diode D2; Negative electrode one tunnel of described diode D2 meets described A and holds, and another road connects the control end of described fan clutch (6); Described resistance R38 is connected between the grid G of field effect transistor VT7 and+24V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210369006.7A CN102874070B (en) | 2012-09-27 | 2012-09-27 | Cooling and heating central control device of public bus |
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| CN201210369006.7A CN102874070B (en) | 2012-09-27 | 2012-09-27 | Cooling and heating central control device of public bus |
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| CN102874070B true CN102874070B (en) | 2015-01-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5184300A (en) * | 1990-03-12 | 1993-02-02 | Mitsubishi Denki Kabushiki Kaisha | Control apparatus for a vehicle for controlling a device mounted thereon |
| US5490556A (en) * | 1993-06-09 | 1996-02-13 | Eagle Engineering And Manufacturing, Inc. | Off-road air conditioning control |
| CN2712685Y (en) * | 2004-07-23 | 2005-07-27 | 福州西诚电子有限公司 | Intelligent type automobile air-conditioning control device |
| CN200946884Y (en) * | 2006-07-06 | 2007-09-12 | 湖北美标汽车制冷系统有限公司 | Automatic controller of lorry air-conditioning system |
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| CN202782577U (en) * | 2012-09-27 | 2013-03-13 | 于新泉 | Cooling and heating centralized control device of public bus |
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