CN202782577U

CN202782577U - Cooling and heating centralized control device of public bus

Info

Publication number: CN202782577U
Application number: CN 201220502868
Authority: CN
Inventors: 于新泉; 张奎
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-09-27
Filing date: 2012-09-27
Publication date: 2013-03-13
Anticipated expiration: 2022-09-27

Abstract

The utility model relates to a cooling and heating centralized control device of a public bus. The cooling and heating centralized control device of the public bus is suitable for an urban public bus which has certain demands to air temperature adjustment and motor low temperature protection. The cooling and heating centralized control device of the public bus is composed of 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 through a controller area network (CAN) bus. The operation control circuit is composed of a first control circuit, a drive and display circuit and a keying circuit. The cooling circuit is composed of a first follower, a second control circuit, a first following and fan drive circuit and a first drive circuit. The heating circuit is composed of a second follower, a third control circuit, a second following and fan drive circuit and a second drive circuit. The cooling and heating centralized control device of the public bus has the advantages of being good in comfort, and solving the problems of the air temperature continuous adjustment and the motor low temperature protection in the public bus.

Description

A kind of bus freezes, heats centralized controlling device

Technical field

The utility model relates to a kind of bus refrigeration, heats centralized controlling device, is applicable to the urban bus that has certain requirements of air temperature modification, engine low temperature protection in the bus.

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 never is with heating combined equipment to the band heating combined equipment also in continuous lifting, be not with fridge equipment from the band heating combined equipment, to namely being with heating combined equipment to be with again fridge equipment; And be coupled from the direct-connected silicon oil clutch that is coupled to as the radiator fan of engine radiating, arrive again and adopt the coupling of water temperature control magnetic clutch; The application of these devices and improvement have improved the traveling comfort of vehicle ride and the low-temperature protection of driving engine.But these devices all are simply separately separately control at present, heating combined equipment can not be realized level and smooth temperature control, when each functional module is all enabled even some can occur influence each other, can not system realize the networking Based Intelligent Control mainly having problem according to factors such as air regulation patterns in Engine Coolant Temperature, vehicle interior temperature, the outer temperature of car, the car:

(1) heating combined equipment is simple switch control, namely open water pump and heater unit by the instrument desk rocker switch, be not with the compartment temperature control system, can only armrest moving switch water pump and heater unit are controlled temperature in the compartment, therefore, and heater unit wind speed or can not regulate, can only divide into groups to close, thus the compartment temperature height has often occured or low or non-uniform temperature causes that the passenger complains, traveling comfort is produced certain influence, the frequent operation rocker switch also exerts an influence to traffic safety.

(2) heating combined equipment can not retrain according to the Engine Coolant Temperature situation speed of its switch and control heater unit, such harm be exactly winter Engine Coolant Temperature do not warm up heater unit and just open, driving engine is rapidly heated reaches the optimum operation temperature; Engine water circulating system heat major part is distributed in the compartment simultaneously, so that excess Temperature in the compartment, and the water temperature of driving engine own does not reach the optimum operation temperature, causes driving engine to move under non-optimum water temperature for a long time, and engine life and compartment traveling comfort are exerted an influence.

(3) fridge equipment effector, water pump, heater unit all adopt independently control system; there is not each other related control; in driver's maloperation or forget when closing a certain function; heater unit and water pump are also in work in the time of often can holding refrigeration; closing when heating water pump forgets and closes; impact for compartment traveling comfort and water pump life-span; particularly in summer; heating in the situation that control water circulation system total valve closes; water pump has been opened in maloperation, might cause the explosion of engine water circulating system pipe.

Summary of the invention

The utility model propose for above problems of the prior art a kind of traveling comfort good, can solve that air themperature in the bus is regulated continuously and the bus refrigeration of engine low temperature protection, heat centralized controlling device.

The technical scheme that its technical matters that solves the utility model adopts is:

A kind of bus freezes, heats centralized controlling device, it is characterized in that it by operation control circuit, refrigeration control circuit and heat control circuit forming; Described operation control circuit, refrigeration control circuit, heat control circuit and connect by the CAN bus; Described operation control circuit is comprised of first control circuit, driving and display circuit and key circuit; Described first control circuit is connected with the CAN bus, and first control circuit is with driving and display circuit is two-way is 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 blower fan driving circuit and the first driving circuit form; The input end of described the first follower connects respectively the mouth of refrigeration sensor in the mouth, car of A/C evaporator temperature sensor of mouth, bus of the outer temperature sensor of car, the input end of the output termination second control circuit of the first follower; Described second control circuit is connected with the CAN bus, and its two-way mouth connects respectively first and follows and the input end of blower fan driving circuit and the input end of the first driving circuit; The mouth of described the first driving circuit connects respectively the control end of air conditioner condensation blower fan of bus and the control end of evaporation fan; Described first follows and the mouth of blower fan driving circuit connects respectively the control end of air conditioner condensation blower fan of bus and the control end of evaporation fan; The mouth of described the first driving circuit connects respectively the control end and the control end that heats the engine radiating heat radiation fan clutch of controlling water circulation of the air-conditioning compressor power-transfer clutch of bus;

Describedly heat that control circuit is followed by the second follower, the 3rd control circuit, second and blower fan driving circuit and the second driving circuit form; Heat the mouth of temperature sensor in the input termination car of described the second follower, the input end of output termination the 3rd control circuit of the second follower; Described the 3rd control circuit is connected with the CAN bus, and its two-way mouth connects respectively second and follows and the input end of blower fan driving circuit and the input end of the second driving circuit; Described second follow and the output termination car of blower fan driving circuit in the control end of heater unit; The mouth of described the second driving circuit connects respectively the control end of water pump in the car and heats the control end of the engine cooling fan power-transfer clutch of control water circulation.

The beneficial effects of the utility model are as follows:

(1) cancelled the rocker switch that heater unit and water pump are controlled, refrigeration control adopts an operation control circuit (hereinafter to be referred as operational module) control with heating to control, make operation easier, open the maloperation that heats control when efficiently solving refrigeration control and heat when closing water pump and forget the situation of closing.

(2) perfect heat control, increase heater unit, water pump etc. and heated load, heating control can be according to the opening and closing of step-less adjustment heater unit speed and control water pump in vehicle interior temperature realization 0%～100% scope that gathers, make temperature in the compartment become the control of automatic smoothing from manual unsettled control, the noise that the heater unit high-speed operation produces has also obtained effective containment, and the traveling comfort of taking is greatly improved.

(3) operation control, refrigeration control, heat control by CAN bus communication networking, maximum range is realized information sharing and exchange, so that the communication between each module and control control to network of organic composition from what disperse, realizes Based Intelligent Control.

(4) cancel heat radiation fan clutch and carried cooling-water temperature sensor and control external member, by refrigeration control, heat control and receive the water temperature message that Engine ECU is sent from car load CAN bus simultaneously, and by heating control circuit control engine heat radiation fan clutch, forbidding heating control when Engine Coolant Temperature in time below 60 ℃ opens, when Engine Coolant Temperature is more than 86 ℃, the adhesive of control engine heat radiation fan clutch, communication by the CAN bus, driving engine is worked under the optimum operation temperature, and actv. has guaranteed the service life of driving engine.

(5) gather the outer temperature of car by refrigeration control, it is invalid to heat the control unlatching when temperature outside the car surpasses 20 ℃, when just having reached 65 ℃, Engine Coolant Temperature (can open when heating), for making the people, the wind that prevents from producing by boasting feels colder, taked first 20% heater unit wind speed operation 5 minutes, after waiting for that water temperature further rises, again heater unit is risen to wind speed setting, it is also safer to make operation control more hommization.

(6) refrigeration control has backed up engine cooling fan clutch control function, when heating control inefficacy or water temperature message dropping, refrigeration control can be taken over rapidly to heat to control and make fan clutch closed, fan clutch is as the critical component of impact driving, adopt dual control, the supportability of control system is obviously strengthened.

Description of drawings

Fig. 1 is functional block diagram of the present utility model;

Fig. 2 is the schematic circuit diagram of operation control circuit of the present utility model;

Fig. 3 is the schematic circuit diagram of refrigeration control circuit of the present utility model;

Fig. 4 is the schematic circuit diagram that heat control circuit of the present utility model;

In Fig. 1-4,4 is heater unit, and 5 is water pump, and 6 is fan clutch, 7 is to heat temperature sensor in the car, 8 is the CAN bus, and 9 is the outer temperature sensor of car, and 10 is evaporator temperature sensor, 11 is cryogenic temperature sensor in the car, 12 is compressor clutch, and 13 is condensation fan, and 14 is evaporation fan.

The specific embodiment

By accompanying drawing 1-4 as can be known present embodiment by operation control circuit 1, refrigeration control circuit 2(hereinafter to be referred as refrigeration module) and heat control circuit 3(hereinafter to be referred as heating module) form; Described operation control circuit 1, refrigeration control circuit 2, heat control circuit 3 and connect by CAN bus 8; Described operation control circuit 1 is comprised of first control circuit, driving and display circuit and key circuit; Described first control circuit is connected with CAN bus 8, and first control circuit is with driving and display circuit is two-way is 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 blower fan driving circuit and the first driving circuit form; The input end of described the first follower connects respectively the mouth of refrigeration sensor 11 in the mouth, car of A/C evaporator temperature sensor 10 of mouth, bus of the outer temperature sensor 9 of car, the input end of the output termination second control circuit of the first follower; Described second control circuit is connected with CAN bus 8, and its two-way mouth connects respectively first and follows and the input end of blower fan driving circuit and the input end of the first driving circuit; Described first follows and the mouth of blower fan driving circuit connects respectively the control end of air conditioner condensation blower fan 13 of bus and the control end of evaporation fan 14; The mouth of described the first driving circuit connects respectively the control end and the control end that heats the engine cooling fan power-transfer clutch 6 of controlling water circulation of the air-conditioning compressor power-transfer clutch 12 of bus;

Describedly heat that control circuit 3 is followed by the second follower, the 3rd control circuit, second and blower fan driving circuit and the second driving circuit form; Heat the mouth of temperature sensor 7 in the input termination car of described the second follower, the input end of output termination the 3rd control circuit of the second follower; Described the 3rd control circuit is connected with CAN bus 8, and its two-way mouth connects respectively second and follows and the input end of blower fan driving circuit and the input end of the second driving circuit; Described second follow and the output termination car of blower fan driving circuit in the control end of heater unit 4; The mouth of described the second driving circuit connects respectively the control end of water pump 5 in the car and the control end of engine cooling fan power-transfer clutch 6.

Described first control circuit is comprised 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 respectively 4 pin, 1 pin of bus transceiving chip IC2; The model of described bus transceiving chip IC2 is TJA1040, and its 6-7 pin connects CAN bus 8, its 8 pin ground connection;

Described driving and display circuit are comprised 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 respectively the 34-32 pin of micro controller system IC1, and the 8-20 pin of display driver chip IC3,23-24 pin, 26-27 pin connect respectively the respective input of read-out IC4; The model of described read-out IC4 is 4301AS-3.

Described key circuit is comprised of button S1-S6; The end of described button S1, button S3, button S5 all connects 6 pin of display driver chip IC3, the 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 the first follower is comprised of the identical branch road of three line structures; Wherein first route voltage comparator ic 7A and peripheral cell resistance R 1-R2 thereof form; The model of described voltage follower IC7A is that the model of the following voltage follower of LM339(and comparator is LM339), its in-phase input end connects in the car mouth of refrigeration sensor 11 through resistance R 2, described resistance R 1 is connected on+mouth of the sensor 11 that freezes in 5V and the car between; Wherein second route voltage follower IC7B and peripheral cell resistance R 3-R4 thereof form; Wherein the 3rd route voltage follower IC7C and peripheral cell resistance R 5-R6 thereof form;

Described second control circuit is comprised 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 respectively the mouth of voltage follower IC7A-IC7C, and its 25-26 pin connects respectively 4 pin, 1 pin of bus transceiving chip IC6; Described bus transceiving chip IC6 model be TJA1040, its 6-7 pin connects CAN bus 8, its 8 pin ground connection;

Described first follows and the blower fan driving circuit is comprised of the identical branch road of two line structures; Wherein first route voltage follower IC7D, comparator IC8A, comparator IC10A, field effect transistor VT(N channel field-effect pipe) 3, resistance R 8-R12, resistance R 39-R46 and capacitor C 1-C2, capacitor C 7-C8 form; The in-phase input end of described voltage follower IC7D connects mouth 40 pin of micro controller system IC5 successively through resistance R 7, resistance R 8, the mouth of voltage follower IC7D connects the in-phase input end of comparator IC8A through resistance R 9; Described capacitor C 1 is connected between the node and ground of resistance R 7 and resistance R 8; The inverting input of described comparator IC8A connects the mouth of comparator IC10A successively through capacitor C 8, resistance R 44, the mouth of comparator IC8A connects the grid G of field effect transistor VT3 through resistance R 11; Described resistance R 10 is connected between the in-phase input end and ground of comparator IC8A; Described resistance R 46 is connected between the inverting input and ground of comparator IC8A; Described resistance R 41 be connected on after resistance R 45 is connected+12V and ground between; The in-phase input end of described comparator IC10A is through the Node B of resistance R 42 connecting resistance R41 and resistance R 45, the mouth of comparator IC10A connects+12V through resistance R 39, resistance R 40 is connected between the mouth and described B point of comparator IC10A, resistance R 44 be connected between the inverting input and ground of comparator IC10A after capacitor C 7 is connected, resistance R 43 is connected with the node of resistance R 44 with capacitor C 8 with the node of capacitor C 7; The source S of described field effect transistor VT3 is through resistance R 12 ground connection, and its drain D connects the control end of described evaporation fan (14); The power end one tunnel of described evaporation fan (14) connects+24V, and another road is through capacitor C 2 ground connection; Wherein second route voltage follower IC8B, comparator IC8C, comparator IC10B, field effect transistor VT4(N channel field-effect pipe), resistance R 13-R18, resistance R 47-R54 and capacitor C 1-C2, capacitor C 9-C10 form;

Described the first driving circuit is comprised of the two-way branch road; Wherein first route aerotron T1, field effect transistor VT1(P channel field-effect pipe) and resistance R 19-R21 form; The base stage of described aerotron T1 connects mouth 34 pin of micro controller system IC5 through resistance R 19, its grounded emitter, and its collecting electrode connects the grid G of field effect transistor VT1 through resistance R 20; The source S of described field effect transistor VT1 connects+24V, and its drain D connects the control end of described compressor clutch 12; Described resistance R 21 be connected on field effect transistor VT1 grid G and+24V between; Wherein second route aerotron T2, field effect transistor VT2(P channel field-effect pipe), diode D1 and resistance R 22-R24 form, 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 through resistance R 22, its grounded emitter, and its collecting electrode connects the grid G of field effect transistor VT1 through resistance R 23; The source S of described field effect transistor VT2 connects+24V, and its drain D connects the anode of diode D1; The negative electrode of described diode D1 is the output terminals A end; Described resistance R 24 be connected on field effect transistor VT2 grid G and+24V between.

Described the second follower is comprised of voltage comparator ic 9A and peripheral cell resistance R 25-R26 thereof; The in-phase input end of described voltage follower IC9A connects the mouth that heats temperature sensor 7 in the car through resistance R 26; Described resistance R 25 is connected on+heats between the mouth of temperature sensor 7 in 5V and the car;

Described the 3rd control circuit is comprised 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 connect the mouth of voltage follower IC9A, and its 25-26 pin connects respectively 4 pin, 1 pin of bus transceiving chip IC11; The model of described bus transceiving chip IC11 is TJA1040, and its 6-7 pin connects CAN bus 8, its 8 pin ground connection;

Described second follow and the blower fan driving circuit by voltage follower IC9B, comparator IC9C, comparator IC10C, field effect transistor VT5(N channel field-effect pipe), resistance R 27-R32, resistance R 55-R62 and capacitor C 5-C6, capacitor C 11-C12 form; The in-phase input end of described voltage follower IC9B connects mouth 40 pin of micro controller system IC10 successively through resistance R 28, resistance R 27, the mouth of voltage follower IC9B connects the in-phase input end of comparator IC9C through resistance R 29; Described capacitor C 6 is connected between the node and ground of resistance R 27 and resistance R 28; The inverting input of described comparator IC9C connects the mouth of comparator IC10C successively through capacitor C 12, resistance R 61, the mouth of comparator IC9C connects the grid G of field effect transistor VT3 through resistance R 31; Described resistance R 30 is connected between the in-phase input end and ground of comparator IC9C; Described resistance R 62 is connected between the inverting input and ground of comparator IC9C; Described resistance R 56 be connected on after resistance R 60 is connected+12V and ground between; The in-phase input end of described comparator IC10C is through the node E of resistance R 58 connecting resistance R56 and resistance R 60, the mouth of comparator IC10C connects+12V through resistance R 55, resistance R 57 is connected between the mouth and described E point of comparator IC10C, resistance R 59 be connected between the inverting input and ground of comparator IC10C after capacitor C 11 is connected, resistance R 59 is connected with the node of resistance R 61 with capacitor C 12 with the node of capacitor C 11; The source S of described field effect transistor VT5 is through resistance R 32 ground connection, and its drain D connects the control end of described heater unit (4); The power end one tunnel of described heater unit (4) connects+24V, and another road is through capacitor C 5 ground connection;

Described the second driving circuit is comprised of the two-way branch road; Wherein first route aerotron T3, field effect transistor VT6(P channel field-effect pipe) and resistance R 33-R35 form; The base stage of described aerotron T3 connects mouth 34 pin of micro controller system IC10 through resistance R 33, its grounded emitter, and its collecting electrode connects the grid G of field effect transistor VT6 through resistance R 34; The source S of described field effect transistor VT6 connects+24V, and its drain D connects the control end of described water pump 5; Described resistance R 35 be connected on field effect transistor VT6 grid G and+24V between; Wherein second route aerotron T4, field effect transistor VT7(P channel field-effect pipe), diode D2 and resistance R 36-R38 form; The base stage of described aerotron T4 connects mouth 33 pin of micro controller system IC10 through resistance R 36, its grounded emitter, and its collecting electrode connects the grid G of field effect transistor VT7 through resistance R 37; The source S of described field effect transistor VT7 connects+24V, and its drain D connects the anode of diode D2; The negative electrode one tunnel of described diode D2 connects described A end, the control end of the described fan clutch 6 of another termination; Described resistance R 38 be connected on field effect transistor VT7 grid G and+24V between.

Button S1 is the ADD key, and button S2 is the SUB key, and button S3 is the MODE key, and button S4 is the FAN key, and button S5 is the OFF key, and button S6 is the ON key.

The working process of present embodiment is as follows:

Command operating and control between the operation control circuit 1 of present embodiment, the refrigeration control circuit 2 and heat control circuit 3 and adopted the CAN bus communication mode that satisfies SAE J1939 agreement, 3 modules are all finished by the CAN bus.

Operational module is as the man-machine interface of whole control setup, various switching on and shutting down, refrigeration or heating mode selection, Temperature Setting, each blower fan wind speed size arrange etc. passes through operation push-button, be converted to serial data by display driver chip IC3 and be input to micro controller system IC1, micro controller system IC1 is converted into the CAN bus message that meets SAE J1939 communications protocol with the serial button data that receives, and is regularly sent to refrigeration module, heating module by bus transceiving chip IC2; Receive by heating the CAN bus messages such as temperature, refrigeration or heating mode in temperature, the car outside cryogenic temperature, evaporator temperature, the car in the car of refrigeration module, heating module timed sending from the car load bus by bus transceiving chip IC2 simultaneously, be treated to serial data input display driver chip IC3 the 2nd pin by micro controller system IC1, drive read-out IC4 and demonstration by display driver chip IC3.The operations such as refrigeration or heating mode are selected, the setting of wind speed size, Temperature Setting all concentrate on the operational module, and refrigeration or heating mode are switched by MODE key continuous key-press; After the start, press the MODE key and once select refrigeration mode, press again the MODE key and once jump to heating mode from refrigeration mode, whenever all only have a kind of pattern available.Send the messages such as start, Temperature Setting, wind speed setting by operational module to refrigeration module by CAN bus 8 when selecting refrigeration mode, send the shutdown message to heating module simultaneously; Send start, Temperature Setting, wind speed setting message by CAN bus 8 to heating module by operational module when selecting heating mode, send the shutdown message to refrigeration module simultaneously, so both guaranteed the easy of operation, also eliminated because the refrigeration of namely opening that maloperation causes is opened again situation about heating.

Refrigeration module is mainly born refrigeration control, heat radiation fan clutch control for subsequent use, the water temperature message that receives the Engine ECU transmission, the functions such as detection of heating module mode of operation.The principle of work of refrigeration module is as follows:

Vehicle interior temperature was input on the A/D mouth (48 pin of micro controller system IC5) of micro controller system IC5 when the bleeder circuit that (1) is comprised of refrigeration vehicle interior temperature sensor 11 and resistance R 1 will freeze by resistance R 2 and voltage follower IC7A, processing by micro controller system IC5 is converted into digital signal with vehicle interior temperature by analog signal, be used for the control of refrigeration module internal logic, then send temperature message by CAN bus 8 to operational module by bus transceiving chip IC6, by operational module the temperature message is converted into displayable numerical value; (2) bleeder circuit that is comprised of evaporator temperature sensor 10 and resistance R 3 is input on the A/D mouth (being 47 pin of micro controller system IC5) of micro controller system IC5 by resistance R 4 and voltage follower IC7B, processing by micro controller system IC5 transfers evaporator temperature to digital signal by analog signal, detect whether frosting of evaporator surface when being used for refrigeration (when evaporator temperature sensor 10 detects temperature and is below zero, frosting of evaporator surface is described, then the close compressor power-transfer clutch 12), then send the temperature message by bus transceiving chip IC6 to operational module, by operational module evaporator temperature is converted into displayable numerical value; (3) bleeder circuit that is comprised of the outer temperature sensor 9 of car and resistance R 5 is input on the A/D mouth (being 46 pin of micro controller system IC5) of micro controller system IC5 by resistance R 6 and voltage follower IC7C, processing by micro controller system IC5 transfers the outer temperature of car to digital signal by analog signal, send the temperature message by bus transceiving chip IC6 to operational module and heating module, operational module is converted into the numerical value that can Gong show with the outer temperature message of the car that receives, and heating module receives the outer temperature message of car and is used for judging whether to open heating control; (4) by the speed governing message of bus transceiving chip IC6 from the evaporation fan 14 of CAN bus 8 reception operational modules transmissions, be converted into the output pulse of the PWM port (being 40 pin of micro controller system IC5) of IC5 by the processing of micro controller system IC5, through following and the speed of driving circuit (i.e. the first branch road) control evaporation fan 14; (5) micro controller system IC5 is converted into the output pulse of PWM port (being 39 pin of micro controller system IC5) with the voltage signal of the outer temperature sensor 9 of car that gathers, through following and driving circuit (i.e. the second branch road) is controlled the speed of condensation fan 13; (6) when 34 pin of micro controller system IC5 output high potential, aerotron T1 saturation conduction, so that also saturation conduction of field effect transistor VT1 ,+24V voltage is added on the compressor clutch 12, makes its closure by resistance R 20; (7) when 33 pin of micro controller system IC5 output high potential, aerotron T2 saturation conduction, by resistance R 23 so that also saturation conduction of field effect transistor VT2, diode D1 conducting output high potential, this circuit is as the standby control circuit of fan clutch 6.

Refrigeration module fan clutch 6 control processs for subsequent use are: (1) refrigeration module, heating module all receive the water temperature message that Engine ECU sends with the forms of broadcasting from CAN bus 8, heating module receives the water temperature message and sends a frame mode of operation and water temperature confirmation message by CAN bus 8 to refrigeration module, refrigeration module can be received the affirmation message that heating module sends, the proof heating module is working properly and received the water temperature message, and this moment, the control of fan clutch 6 was finished by heating module; (2) do not receive the message that heating module sends or the message of only receiving mode of operation when refrigeration module, then show the water temperature message that heating module lost efficacy and can not send message or not receive the Engine ECU transmission, this moment, heating module can not be controlled the closure of fan clutch 6, then fan clutch 6 is transferred to refrigeration module and is controlled, refrigeration module is according to the Engine Coolant Temperature message that receives, when water temperature is more than 86 ℃, by standby control circuit output high potential control fan clutch 6 adhesives of fan clutch 6, then exports active potential when Engine Coolant Temperature in time below 80 ℃ fan clutch 6 is disconnected; (3) do not receive the water temperature confirmation message that heating module sends and when itself not receiving the water temperature message when refrigeration module yet, show that then the water temperature message that this moment, Engine ECU sent breaks down, this moment, refrigeration module made fan clutch 6 force adhesive by the standby control circuit output high potential of fan clutch 6, satisfy the Vehicle Driving Cycle requirement, the control by above-mentioned (1), (2), (3) is greatly improved the reliability control of engine cooling fan power-transfer clutch 6.

Heating module is responsible for centralized controlling device and is heated closure and disconnection with engine cooling fan power-transfer clutch 6.The principle of work of heating module and work engineering are as follows:

One, (1) is 48 pin of micro controller system IC10 by heating the bleeder circuit that temperature sensor 7 and resistance R 25 form in the car by the A/D(that resistance R 26 and voltage follower IC9A are input to micro controller system IC10) on the mouth, processing by micro controller system IC10 is converted into digital signal with vehicle interior temperature by analog signal, be used for the control of heating module internal logic, then send vehicle interior temperature signal by CAN bus 8 to operational module by bus transceiving chip IC11, be translated into displayable numerical value by operational module; (2) by the speed governing message of bus transceiving chip IC11 from the heater unit 4 of CAN bus 8 reception operational modules transmissions, be converted into the output pulse of PWM port (being 40 pin of micro controller system IC10) by the processing of micro controller system IC10, through following and the speed of driving circuit control heater unit 4; (3) when 34 pin of micro controller system IC10 output high potential, aerotron T3 saturation conduction, so that also saturation conduction of field effect transistor VT6 ,+24V voltage is added on the water pump 5, makes its operation by resistance R 34; (4) when 33 pin of micro controller system IC10 output high potential, aerotron T4 saturation conduction, so that also saturation conduction of field effect transistor VT7 ,+24V voltage is added on the fan clutch 6 through diode D2, makes its closure by resistance R 37;

Two, the heating module control process is: heating module from CAN bus 8 receive water temperature message that Engine ECU send with the forms of broadcasting, start that operational module sends, heat Temperature Setting, heater unit 4 speed are regulated message, temperature message outside the car that refrigeration module receives; The temperature message is no more than 20 ℃ outside satisfying the car of 1. working as reception; 2. work as the Engine Coolant Temperature message more than 65 ℃; 3. operational module sends the temperature height heat the design temperature message than 7 inductions that heat the vehicle interior temperature sensor; During this three conditions, exported the PWM waveform of 20% dutycycle by 40 pin of micro controller system IC10, make heater unit 4 with 20% operation of setting speed, simultaneously 34 pin of micro controller system IC10 output high potential makes aerotron T3 saturation conduction, by resistance R 34 so that also saturation conduction of field effect transistor VT6, + 24V voltage is added on the water pump 5, make its running, just reached 65 ℃ because of Engine Coolant Temperature this moment, and the wind of producing by boasting also is not too hot, allow the slowly preheating of heater unit 4 low-speed runnings, by the timing sequence of micro controller system IC10, after 5 minutes, after Engine Coolant Temperature surpasses 65 ℃ of certain numerical value, allow heater unit 4 with the setting speed high-speed operation this moment, and vehicle interior temperature is raise rapidly; When the temperature that heats temperature sensor 7 induction in the car is close to when differing from 2 ℃ with design temperature, allow heater unit move with 40% of setting speed, vehicle interior temperature continues to rise, vehicle interior temperature is more near design temperature, the speed of heater unit 4 is more approaching zero, and the speed of heater unit 4 is slower when namely controlling vehicle interior temperature more near the target setting temperature, then closes heater unit 4 and water pump 5 when arriving the target setting temperature, make the temperature control in the compartment become more level and smooth by this control, traveling comfort is greatly improved.The outer temperature of car is to heating the restriction of unlatching, eliminated the injury that because of maloperation water pump 5 work is caused to driving engine water route system not needing to open the weather that heats.

The principle of work of engine low temperature protection is as follows: when the water temperature message that the Engine ECU that 1. receives when heating module sends is lower than 60 ℃, do not allow to heat unlatching; When the water temperature message that the Engine ECU that 2. receives when heating module sends is lower than 80 ℃, fan clutch 6 not adhesives; 3. operational module is set and is heated 16 ℃～30 ℃ of range of temperaturess; The setting of these modes; heating module is postponed opening and can be allowed driving engine heat up rapidly when making low temperature; after heating unlatching; adhesive when fan clutch 6 reaches 85 ℃ of optimum temperatures in Engine Coolant Temperature; operational module constraint temperature is in certain scope; prevented that Temperature Setting is too high in the compartment; take too many heat of engine when heating; Engine Coolant Temperature is always paced up and down between 60 ℃～70 ℃, causes fan clutch 6 all the time not adhesives, and driving engine is not moved under optimum temperature for a long time; therefore so that the engine low temperature protection effectively strengthened; prolonged engine life, made simultaneously the temperature control in the compartment also more level and smooth, travelling comfort is greatly improved.

Claims

1. a bus freezes, heats centralized controlling device, it is characterized in that it by operation control circuit (1), refrigeration control circuit (2) and heat control circuit (3) forming; Described operation control circuit (1), refrigeration control circuit (2), heat control circuit (3) and connect by CAN bus (8); Described operation control circuit (1) is comprised of first control circuit, driving and display circuit and key circuit; Described first control circuit is connected with CAN bus (8), and first control circuit is with driving and display circuit is two-way is 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 blower fan driving circuit and the first driving circuit form; The input end of described the first follower connects respectively the mouth of refrigeration sensor (11) in the mouth, car of A/C evaporator temperature sensor (10) of mouth, bus of the outer temperature sensor (9) of car, the input end of the output termination second control circuit of the first follower; Described second control circuit is connected with CAN bus (8), and its two-way mouth connects respectively first and follows and the input end of blower fan driving circuit and the input end of the first driving circuit; Described first follows and the mouth of blower fan driving circuit connects respectively the control end of air conditioner condensation blower fan (13) of bus and the control end of evaporation fan (14); The mouth of described the first driving circuit connects respectively the control end and the control end that heats the engine cooling fan power-transfer clutch (6) of controlling water circulation of the air-conditioning compressor power-transfer clutch (12) of bus;

Describedly heat that control circuit (3) is followed by the second follower, the 3rd control circuit, second and blower fan driving circuit and the second driving circuit form; Heat the mouth of temperature sensor (7) in the input termination car of described the second follower, the input end of output termination the 3rd control circuit of the second follower; Described the 3rd control circuit is connected with CAN bus (8), and its two-way mouth connects respectively second and follows and the input end of blower fan driving circuit and the input end of the second driving circuit; Described second follow and the output termination car of blower fan driving circuit in the control end of heater unit (4); The mouth of described the second driving circuit connects respectively the control end of water pump (5) in the car and the control end of described fan clutch (6).

2. bus according to claim 1 freezes, heats centralized controlling device, it is characterized in that described first control circuit is comprised of micro controller system IC1 and bus transceiving chip IC2; The 25-26 pin of described micro controller system IC1 connects respectively 4 pin, 1 pin of bus transceiving chip IC2; The 6-7 pin of described bus transceiving chip IC2 connects CAN bus (8), its 8 pin ground connection;

Described driving and display circuit are comprised of display driver chip IC3 and read-out IC4; The 2-4 pin of described display driver chip IC3 connects respectively the 34-32 pin of micro controller system IC1, and the 8-20 pin of display driver chip IC3,23-24 pin, 26-27 pin connect respectively the respective input of read-out IC4;

3. bus according to claim 2 freezes, heats centralized controlling device, it is characterized in that described the first follower is comprised of the identical branch road of three line structures; Wherein first route voltage comparator ic 7A and peripheral cell resistance R 1-R2 thereof form; The in-phase input end of described voltage follower IC7A connects the mouth of sensor (11) of freezing in the car through resistance R 2, described resistance R 1 is connected on+5V and car between the mouth of refrigeration sensor (11); Wherein second route voltage follower IC7B and peripheral cell resistance R 3-R4 thereof form; Wherein the 3rd route voltage follower IC7C and peripheral cell resistance R 5-R6 thereof form;

Described second control circuit is comprised of micro controller system IC5 and bus transceiving chip IC6; The input end 46-48 pin of described micro controller system IC5 connects respectively the mouth of voltage follower IC7C-IC7A, and its 25-26 pin connects respectively 4 pin, 1 pin of bus transceiving chip IC6; The 6-7 pin of described bus transceiving chip IC6 connects CAN bus (8), its 8 pin ground connection;

Described first follows and the blower fan driving circuit is comprised of the identical branch road of two line structures; Wherein first route voltage follower IC7D, comparator IC8A, comparator IC10A, field effect transistor VT3, resistance R 8-R12, resistance R 39-R46 and capacitor C 1-C2, capacitor C 7-C8 form; The in-phase input end of described voltage follower IC7D connects mouth 40 pin of micro controller system IC5 successively through resistance R 7, resistance R 8, the mouth of voltage follower IC7D connects the in-phase input end of comparator IC8A through resistance R 9; Described capacitor C 1 is connected between the node and ground of resistance R 7 and resistance R 8; The inverting input of described comparator IC8A connects the mouth of comparator IC10A successively through capacitor C 8, resistance R 44, the mouth of comparator IC8A connects the grid G of field effect transistor VT3 through resistance R 11; Described resistance R 10 is connected between the in-phase input end and ground of comparator IC8A; Described resistance R 46 is connected between the inverting input and ground of comparator IC8A; Described resistance R 41 be connected on after resistance R 45 is connected+12V and ground between; The in-phase input end of described comparator IC10A is through the Node B of resistance R 42 connecting resistance R41 and resistance R 45, the mouth of comparator IC10A connects+12V through resistance R 39, resistance R 40 is connected between the mouth and described B point of comparator IC10A, resistance R 44 be connected between the inverting input and ground of comparator IC10A after capacitor C 7 is connected, resistance R 43 is connected with the node of resistance R 44 with capacitor C 8 with the node of capacitor C 7; The source S of described field effect transistor VT3 is through resistance R 12 ground connection, and its drain D connects the control end of described evaporation fan (14); The power end one tunnel of described evaporation fan (14) connects+24V, and another road is through capacitor C 2 ground connection; Wherein second route voltage follower IC8B, comparator IC8C, comparator IC10B, field effect transistor VT4, resistance R 13-R18, resistance R 47-R54 and capacitor C 1-C2, capacitor C 9-C10 form;

Described the first driving circuit is comprised of the two-way branch road; Wherein first route aerotron T1, field effect transistor VT1 and resistance R 19-R21 form; The base stage of described aerotron T1 connects mouth 34 pin of micro controller system IC5 through resistance R 19, its grounded emitter, and its collecting electrode connects the grid G of field effect transistor VT1 through resistance R 20; The source S of described field effect transistor VT1 connects+24V, and its drain D connects the control end of described compressor clutch (12); Described resistance R 21 be connected on field effect transistor VT1 grid G and+24V between; Wherein second route aerotron T2, field effect transistor VT2, diode D1 and resistance R 22-R24 form; The base stage of described aerotron T2 connects mouth 33 pin of micro controller system IC5 through resistance R 22, its grounded emitter, and its collecting electrode connects the grid G of field effect transistor VT1 through resistance R 23; The source S of described field effect transistor VT2 connects+24V, and its drain D connects the anode of diode D1; The negative electrode of described diode D1 is the output terminals A end; Described resistance R 24 be connected on field effect transistor VT2 grid G and+24V between.

4. bus according to claim 3 freezes, heats centralized controlling device, it is characterized in that described the second follower is comprised of voltage comparator ic 9A and peripheral cell resistance R 25-R26 thereof; The in-phase input end of described voltage follower IC9A connects the mouth that heats temperature sensor (7) in the car through resistance R 26; Described resistance R 25 is connected on+heats between the mouth of temperature sensor (7) in 5V and the car;

Described the 3rd control circuit is comprised of micro controller system IC10 and bus transceiving chip IC11; Input end 48 pin of described micro controller system IC10 connect the mouth of voltage follower IC9A, and its 25-26 pin connects respectively 4 pin, 1 pin of bus transceiving chip IC11; The 6-7 pin of described bus transceiving chip IC11 connects CAN bus (8), its 8 pin ground connection;

Described second follows and the blower fan driving circuit is comprised of voltage follower IC9B, comparator IC9C, comparator IC10C, field effect transistor VT5, resistance R 27-R32, resistance R 55-R62 and capacitor C 5-C6, capacitor C 11-C12; The in-phase input end of described voltage follower IC9B connects mouth 40 pin of micro controller system IC10 successively through resistance R 28, resistance R 27, the mouth of voltage follower IC9B connects the in-phase input end of comparator IC9C through resistance R 29; Described capacitor C 6 is connected between the node and ground of resistance R 27 and resistance R 28; The inverting input of described comparator IC9C connects the mouth of comparator IC10C successively through capacitor C 12, resistance R 61, the mouth of comparator IC9C connects the grid G of field effect transistor VT3 through resistance R 31; Described resistance R 30 is connected between the in-phase input end and ground of comparator IC9C; Described resistance R 62 is connected between the inverting input and ground of comparator IC9C; Described resistance R 56 be connected on after resistance R 60 is connected+12V and ground between; The in-phase input end of described comparator IC10C is through the node E of resistance R 58 connecting resistance R56 and resistance R 60, the mouth of comparator IC10C connects+12V through resistance R 55, resistance R 57 is connected between the mouth and described E point of comparator IC10C, resistance R 59 be connected between the inverting input and ground of comparator IC10C after capacitor C 11 is connected, resistance R 59 is connected with the node of resistance R 61 with capacitor C 12 with the node of capacitor C 11; The source S of described field effect transistor VT5 is through resistance R 32 ground connection, and its drain D connects the control end of described heater unit (4); The power end one tunnel of described heater unit (4) connects+24V, and another road is through capacitor C 5 ground connection;

Described the second driving circuit is comprised of the two-way branch road; Wherein first route aerotron T3, field effect transistor VT6 and resistance R 33-R35 form; The base stage of described aerotron T3 connects mouth 34 pin of micro controller system IC10 through resistance R 33, its grounded emitter, and its collecting electrode connects the grid G of field effect transistor VT6 through resistance R 34; The source S of described field effect transistor VT6 connects+24V, and its drain D connects the control end of described water pump (5); Described resistance R 35 be connected on field effect transistor VT6 grid G and+24V between; Wherein second route aerotron T4, field effect transistor VT7, diode D2 and resistance R 36-R38 form; The base stage of described aerotron T4 connects mouth 33 pin of micro controller system IC10 through resistance R 36, its grounded emitter, and its collecting electrode connects the grid G of field effect transistor VT7 through resistance R 37; The source S of described field effect transistor VT7 connects+24V, and its drain D connects the anode of diode D2; The negative electrode one tunnel of described diode D2 connects described A end, and another road connects the control end of described fan clutch (6); Described resistance R 38 be connected on field effect transistor VT7 grid G and+24V between.