Pure electric vehicle warm air system and control method
阅读说明：本技术 一种纯电动汽车暖风系统及控制方法 (Pure electric vehicle warm air system and control method ) 是由 王伟龙 许丽娟 田业光 赵永振 燕飞 侯国栋 韩涛 李阳雪 孙翠 岁本月 黄�俊 于 2019-10-11 设计创作，主要内容包括：本发明公开了一种纯电动汽车暖风系统,包括通过管路依次连接的水泵、电机控制器的冷却管路、驱动电机的冷却管路、水箱,水箱的出水管路与水泵进水口相连接,形成整车冷却循环回路,在水箱出水口与水泵进水口之间的管路上并联连接有供暖支管路,供暖支管路进水端连接在靠近水泵进水口的管路上,供暖支管路出水端连接在靠近水箱出水口的管路上,供暖支管路上布设有监测系统和执行系统,监测系统用于采集信号并将采集的信号发送到控制系统,由控制系统对信号进行处理并下达指令给执行系统,通过执行系统执行管路的不同连接方式实现对驾驶室内高低暖风的供给。本发明可降低纯电动汽车的电能消耗,提升续航里程,同时节约整车布置空间、方便整车维护。(The invention discloses a pure electric automobile warm air system, which comprises a water pump, a cooling pipeline of a motor controller, a cooling pipeline of a driving motor and a water tank which are sequentially connected through pipelines, wherein a water outlet pipeline of the water tank is connected with a water inlet of the water pump to form a whole automobile cooling circulation loop, a heating branch pipeline is connected in parallel on a pipeline between the water outlet of the water tank and the water inlet of the water pump, the water inlet end of the heating branch pipeline is connected on a pipeline close to the water inlet of the water pump, the water outlet end of the heating branch pipeline is connected on a pipeline close to the water outlet of the water tank, a monitoring system and an execution system are arranged on the heating branch pipeline, the monitoring system is used for acquiring signals and sending the acquired signals to the control system, the control system processes the signals and sends instructions to the execution system, the supply of high and low warm air in the cab is realized through different connection modes of the execution pipelines of the execution system. The invention can reduce the electric energy consumption of the pure electric automobile, improve the endurance mileage, save the layout space of the whole automobile and facilitate the maintenance of the whole automobile.)
1. The utility model provides a pure electric vehicles warm braw system, including whole car cooling cycle water route, whole car cooling cycle water route includes the water pump that connects gradually through the pipeline, machine controller's cooling tube way, driving motor's cooling tube way, the water tank, be connected through the pipeline between the delivery port of water tank and the water inlet of water pump, form whole car cooling cycle return circuit, through the auxiliary water tank delivery port of whole car of pipeline intercommunication on the pipeline between the delivery port of water tank and the water inlet of water pump, the last hydroecium of water tank passes through the pipeline and is connected with auxiliary water tank's degasification articulate, its characterized in that:
parallelly connected with heating branch pipe way on the pipeline between the delivery port of water tank and the water inlet of water pump, wherein: the water inlet end of the heating branch pipeline is connected to a pipeline close to the water inlet of the water pump, and the water outlet end of the heating branch pipeline is connected to a pipeline close to the water outlet of the water tank; the heating branch pipeline is provided with a monitoring system and an execution system, the monitoring system is used for collecting signals and sending the collected signals to the control system, the control system processes the signals and sends instructions to the execution system, and the supply of high-low hot air in the cab is realized through different connection modes of the execution pipeline of the execution system;
the heating branch pipeline comprises a first three-way electromagnetic valve, a PTC water pump, a PTC liquid heater with overtemperature and overcurrent protection, a warm air water tank and a second three-way electromagnetic valve which are arranged between a water inlet end and a water outlet end of the heating branch pipeline and are sequentially connected through a pipeline, wherein the first three-way electromagnetic valve and the second three-way electromagnetic valve are also directly connected through a pipeline, and the PTC water pump is adaptive to the lift of the water pump; the first three-way electromagnetic valve, the PTC water pump, the PTC liquid heater and the second three-way electromagnetic valve form an execution system together;
the monitoring system comprises a large circulation flow sensor, a small circulation flow sensor and a vehicle instrument, wherein the large circulation flow sensor is connected in series on a pipeline between the second three-way electromagnetic valve and the water outlet end of the heating branch pipeline and is used for monitoring flow data flowing through the pipeline and sending the flow data to the vehicle controller; the small circulation flow sensor is connected in series on a pipeline between the first three-way electromagnetic valve and the second three-way electromagnetic valve and used for monitoring flow data flowing through the pipeline and sending the flow data to the whole vehicle controller; the whole vehicle instrument is arranged in the cab and used for reflecting the working conditions of all systems;
the control part comprises a warm air control switch and a vehicle control unit, the warm air control switch is provided with a high-temperature switch and a low-temperature switch for controlling the temperature of warm air, the warm air control switch and the vehicle control unit are arranged in a cab, the warm air control switch is connected with the vehicle control unit through a circuit, the vehicle control unit is connected with a vehicle instrument through a circuit, and the vehicle instrument is arranged in the cab;
the first three-way electromagnetic valve, the PTC water pump, the PTC liquid heater and the second three-way electromagnetic valve are electrically connected with the whole vehicle controller and controlled by the whole vehicle controller;
the large circulation flow sensor and the small circulation flow sensor are connected with the vehicle control unit through data lines.
2. The control method of the pure electric vehicle heating system of claim 1, characterized by comprising: the control method of the pure electric vehicle warm air system comprises the following steps:
PTC liquid heater is provided with cooling water heating temperature default range in vehicle control unit, and big circulation flow sensor and little circulation flow sensor are provided with the flow default in vehicle control unit, and the signal of telecommunication that first three way solenoid valve and second three way solenoid valve sent through vehicle control unit carries out the switching of corresponding different connected modes, wherein:
except that the large circulation flow sensor and the small circulation flow sensor need to simultaneously meet a preset value in a self-checking state of the warm air system, in a normal operation state, only one sensor receives flow information meeting the preset value, otherwise, the whole vehicle controller judges that the warm air system works abnormally, and a whole vehicle instrument displays error information of the abnormal work of the warm air system;
during the use, when opening the high temperature switch or the low temperature switch of warm braw control switch, send the instruction through vehicle control unit: the whole warm air system carries out self-checking for 5 seconds, in the self-checking process, the pipeline connections of all components on the warm air branch pipeline are in an open and intercommunicated state, cooling water flows through all the components and exhausts air in the pipeline, at the moment, the PTC liquid heater does not work, the large circulation flow sensor and the small circulation flow sensor are in a working state, flow information received by the large circulation flow sensor and the small circulation flow sensor at the 5 th second meets a preset value, and otherwise, the self-checking is prolonged for 5 seconds; after self-checking again, if the flow information received by at least one of the two sensors does not meet the preset value, judging that the heating system works abnormally, and displaying error information of the working abnormality of the heating system by the whole vehicle instrument; the warm air system is self-checked only once in one use period;
when the warm air temperature that sets for is lower, open the low temperature switch of warm air control switch, after warm air system self-checking accomplished, send the instruction through vehicle control unit: the PTC liquid heater is in a non-working state, and a pipeline between the first three-way electromagnetic valve and the second three-way electromagnetic valve is in a cut-off state; the circulation path of the cooling water is as follows: the hot air returns to the pipeline between the water outlet of the water tank and the water pump inlet through a pipeline between the water outlet of the water tank and the water pump inlet, a first three-way electromagnetic valve, a PTC water pump, a PTC liquid heater, a warm air water tank, a second three-way electromagnetic valve and a large circulation flow sensor in sequence;
when the warm air temperature that sets for is higher, open the high temperature switch of warm air control switch, after warm air system self-checking accomplished, send the instruction through vehicle control unit: the PTC liquid heater is in a working state, the connection between the first three-way electromagnetic valve and the cooling circulation water path is cut off, the connection between the second three-way electromagnetic valve and the large circulation flow sensor is cut off, and a pipeline between the first three-way electromagnetic valve and the second three-way electromagnetic valve is in an open and intercommunicating state; the circulation path of the cooling water is as follows: the cooling water sequentially passes through a first three-way electromagnetic valve, a PTC water pump, a PTC liquid heater, a warm air water tank, a second three-way electromagnetic valve and a small circulation flow sensor and then returns to the first three-way electromagnetic valve, the cooling water is internally circulated in a heating branch pipeline, in the process, when the temperature of the cooling water is lower than the preset lowest temperature of the PTC liquid heater, the PTC liquid heater starts to work, and when the temperature of the cooling water exceeds the preset highest temperature of the PTC liquid heater, the PTC liquid heater stops working; when leakage occurs and the flow cannot meet the preset value of the small circulation flow sensor, the whole vehicle instrument displays error information of abnormal working of the warm air system.
Technical Field
The invention relates to the technical field of pure electric vehicles, in particular to a pure electric vehicle heating system and a control method.
Background
With the increasing energy crisis and the increasing environmental protection requirements, the electric driving of vehicles has become a trend. Because the engine is not used, the NVH performance of the whole vehicle is obviously improved, the comfort of drivers and passengers is improved, and the performance of cold and warm air in the comfort index is also important. However, since the engine, the motor and other components are not operated, they cannot provide enough heat to meet the demand of warm air, and thus an auxiliary heating device, such as a PTC liquid heater, is required. The existing electric vehicle warm air system generally conveys cooling water in a whole vehicle cooling water channel to a PTC liquid heater through an independent PTC water pump, conveys the cooling water to a warm air water tank in a vehicle body after being heated, carries out heat exchange between air sent by an air blower and the heated cooling liquid, sends the heated air into the vehicle through air outlets by the air blower, and returns the cooling water to the whole vehicle cooling water channel again after passing through the warm air water tank.
In the process of implementing the invention, the inventor finds that the following problems exist in the prior art:
(1) in the existing warm air system, cooling water heated by a PTC liquid heater is from a cooling circulation water path of a finished automobile, when a driver and passengers select a high warm air temperature, because the cooling water passing through the PTC liquid heater is mixed water after the cooling water after being heated and subjected to heat exchange enters the cooling circulation water path, the temperature of the mixed water is lower than that of the water after being heated and subjected to heat exchange by the PTC liquid heater, the PTC liquid heater is enabled to be in a heating state for a long time in order to ensure a preset temperature, the electric energy of the finished automobile is wasted, and the endurance mileage is reduced;
(2) the warm air system can additionally increase a warm air auxiliary water tank when adopting an independent cooling circulation water path, but is not convenient for filling cooling liquid, and is not beneficial to overall arrangement when the space of the cabin is compact.
Disclosure of Invention
The invention provides a pure electric vehicle heating system and a control method thereof, aiming at solving the problems of electric energy waste and cabin space occupation caused by the existing heating system.
Therefore, the technical scheme of the invention is as follows: the utility model provides a pure electric vehicles warm braw system, including whole car cooling cycle water route, whole car cooling cycle water route includes the water pump that connects gradually through the pipeline, machine controller's cooling tube way, driving motor's cooling tube way, the water tank, be connected through the pipeline between the delivery port of water tank and the water inlet of water pump, form whole car cooling cycle return circuit, through the auxiliary water tank delivery port of whole car of pipeline intercommunication on the pipeline between the delivery port of water tank and the water inlet of water pump, the last hydroecium of water tank passes through the pipeline and is connected with auxiliary water tank's degasification articulate, its characterized in that:
parallelly connected with heating branch pipe way on the pipeline between the delivery port of water tank and the water inlet of water pump, wherein: the water inlet end of the heating branch pipeline is connected to a pipeline close to the water inlet of the water pump, and the water outlet end of the heating branch pipeline is connected to a pipeline close to the water outlet of the water tank; the heating branch pipeline is provided with a monitoring system and an execution system, the monitoring system is used for collecting signals and sending the collected signals to the control system, the control system processes the signals and sends instructions to the execution system, and the supply of high-low hot air in the cab is realized through different connection modes of the execution pipeline of the execution system;
the heating branch pipeline comprises a first three-way electromagnetic valve, a PTC water pump, a PTC liquid heater with overtemperature and overcurrent protection, a warm air water tank and a second three-way electromagnetic valve which are arranged between a water inlet end and a water outlet end of the heating branch pipeline and are sequentially connected through a pipeline, wherein the first three-way electromagnetic valve and the second three-way electromagnetic valve are also directly connected through a pipeline, and the PTC water pump is adaptive to the lift of the water pump; the first three-way electromagnetic valve, the PTC water pump, the PTC liquid heater and the second three-way electromagnetic valve form an execution system together;
the monitoring system comprises a large circulation flow sensor, a small circulation flow sensor and a vehicle instrument, wherein the large circulation flow sensor is connected in series on a pipeline between the second three-way electromagnetic valve and the water outlet end of the heating branch pipeline and is used for monitoring flow data flowing through the pipeline and sending the flow data to the vehicle controller; the small circulation flow sensor is connected in series on a pipeline between the first three-way electromagnetic valve and the second three-way electromagnetic valve and used for monitoring flow data flowing through the pipeline and sending the flow data to the whole vehicle controller; the whole vehicle instrument is arranged in the cab and used for reflecting the working conditions of all systems;
the control part comprises a warm air control switch and a vehicle control unit, the warm air control switch is provided with a high-temperature switch and a low-temperature switch for controlling the temperature of warm air, the warm air control switch and the vehicle control unit are arranged in a cab, the warm air control switch is connected with the vehicle control unit through a circuit, the vehicle control unit is connected with a vehicle instrument through a circuit, and the vehicle instrument is arranged in the cab;
the first three-way electromagnetic valve, the PTC water pump, the PTC liquid heater and the second three-way electromagnetic valve are electrically connected with the whole vehicle controller and controlled by the whole vehicle controller;
the large circulation flow sensor and the small circulation flow sensor are connected with the vehicle control unit through data lines.
The control method of the pure electric vehicle warm air system comprises the following steps:
PTC liquid heater is provided with cooling water heating temperature default range in vehicle control unit, and big circulation flow sensor and little circulation flow sensor are provided with the flow default in vehicle control unit, and the signal of telecommunication that first three way solenoid valve and second three way solenoid valve sent through vehicle control unit carries out the switching of corresponding different connected modes, wherein:
except that the large circulation flow sensor and the small circulation flow sensor need to simultaneously meet a preset value in a self-checking state of the warm air system, in a normal operation state, only one sensor receives flow information meeting the preset value, otherwise, the whole vehicle controller judges that the warm air system works abnormally, and a whole vehicle instrument displays error information of the abnormal work of the warm air system;
during the use, when opening the high temperature switch or the low temperature switch of warm braw control switch, send the instruction through vehicle control unit: the whole warm air system carries out self-checking for 5 seconds, in the self-checking process, the pipeline connections of all components on the warm air branch pipeline are in an open and intercommunicated state, cooling water flows through all the components and exhausts air in the pipeline, at the moment, the PTC liquid heater does not work, the large circulation flow sensor and the small circulation flow sensor are in a working state, flow information received by the large circulation flow sensor and the small circulation flow sensor at the 5 th second meets a preset value, and otherwise, the self-checking is prolonged for 5 seconds; after self-checking again, if the flow information received by at least one of the two sensors does not meet the preset value, judging that the heating system works abnormally, and displaying error information of the working abnormality of the heating system by the whole vehicle instrument; the warm air system is self-checked only once in one use period;
when the warm air temperature that sets for is lower, open the low temperature switch of warm air control switch, after warm air system self-checking accomplished, send the instruction through vehicle control unit: the PTC liquid heater is in a non-working state, and a pipeline between the first three-way electromagnetic valve and the second three-way electromagnetic valve is in a cut-off state; the circulation path of the cooling water is as follows: the hot air returns to the pipeline between the water outlet of the water tank and the water pump inlet through a pipeline between the water outlet of the water tank and the water pump inlet, a first three-way electromagnetic valve, a PTC water pump, a PTC liquid heater, a warm air water tank, a second three-way electromagnetic valve and a large circulation flow sensor in sequence;
when the warm air temperature that sets for is higher, open the high temperature switch of warm air control switch, after warm air system self-checking accomplished, send the instruction through vehicle control unit: the PTC liquid heater is in a working state, the connection between the first three-way electromagnetic valve and the cooling circulation water path is cut off, the connection between the second three-way electromagnetic valve and the large circulation flow sensor is cut off, and a pipeline between the first three-way electromagnetic valve and the second three-way electromagnetic valve is in an open and intercommunicating state; the circulation path of the cooling water is as follows: the cooling water sequentially passes through a first three-way electromagnetic valve, a PTC water pump, a PTC liquid heater, a warm air water tank, a second three-way electromagnetic valve and a small circulation flow sensor and then returns to the first three-way electromagnetic valve, the cooling water is internally circulated in a heating branch pipeline, in the process, when the temperature of the cooling water is lower than the preset lowest temperature of the PTC liquid heater, the PTC liquid heater starts to work, and when the temperature of the cooling water exceeds the preset highest temperature of the PTC liquid heater, the PTC liquid heater stops working; when leakage occurs and the flow cannot meet the preset value of the small circulation flow sensor, the whole vehicle instrument displays error information of abnormal working of the warm air system.
Has the advantages that: the heating system can effectively reduce the electric energy consumption of the pure electric vehicle heating system, improve the endurance mileage, save the layout space of the whole vehicle and facilitate the maintenance of the whole vehicle.
When the temperature of the warm air is set to be lower, heat of the motor and other parts is adopted for supplying heat;
when the temperature of the set warm air is higher, an independent warm air circulating water path is adopted for supplying heat, when the temperature of the cooling water is lower than the preset lowest temperature of the PTC liquid heater, the PTC liquid heater starts to work, and when the temperature of the cooling water exceeds the preset highest temperature of the PTC liquid heater, the PTC liquid heater stops working, so that the energy-saving effect is achieved.
Drawings
Fig. 1 is a layout diagram of a conventional cooling circulation water passage of a whole vehicle.
Fig. 2 is a schematic structural diagram of the heater system of the present invention.
Fig. 3 is a schematic diagram of a warm air cooling water path during self-inspection of the warm air system.
Fig. 4 is a schematic view of a warm air cooling water path when the warm air temperature is set to be low in the warm air system of the present invention.
Fig. 5 is a schematic view of a warm air cooling water path when the warm air temperature is set to be high in the warm air system of the present invention.
FIG. 6 is a schematic view of a monitoring and control process of the heating system according to the present invention.
Shown in the figure: 1. an auxiliary water tank; 2. a water pump; 3. a motor controller; 4. a drive motor; 5. a water tank; 6. a large circulation flow sensor; 7. a warm air water tank; 8. a second three-way solenoid valve; 9. a PTC liquid heater; 10. A small circulation flow sensor; 11. a PTC water pump; 12. a first three-way solenoid valve.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, but the embodiment should not be construed as limiting the present invention.
The invention is shown in fig. 1 to 6:
a pure electric vehicle heating system comprises a whole vehicle cooling circulation water path, wherein the whole vehicle cooling circulation water path comprises a
a heating branch pipeline is connected in parallel on the pipeline between the water outlet of the
the heating branch pipeline comprises a first three-way
the monitoring system comprises a large
the control part comprises a warm air control switch and a vehicle control unit, the warm air control switch is provided with a high-temperature switch and a low-temperature switch for controlling the temperature of warm air, the warm air control switch and the vehicle control unit are arranged in a cab, the warm air control switch is connected with the vehicle control unit through a circuit, the vehicle control unit is connected with a vehicle instrument through a circuit, and the vehicle instrument is arranged in the cab;
the first three-way
the large
The control method of the pure electric vehicle warm air system comprises the following steps:
PTC liquid heater is provided with cooling water heating temperature default range in vehicle control unit, and big circulation flow sensor and little circulation flow sensor are provided with the flow default in vehicle control unit, and the signal of telecommunication that first three way solenoid valve and second three way solenoid valve sent through vehicle control unit carries out the switching of corresponding different connected modes, wherein:
except that the large circulation flow sensor and the small circulation flow sensor need to simultaneously meet a preset value in a self-checking state of the warm air system, in a normal operation state, only one sensor receives flow information meeting the preset value, otherwise, the whole vehicle controller judges that the warm air system works abnormally, and a whole vehicle instrument displays error information of the abnormal work of the warm air system;
as shown in fig. 3: during the use, when opening the high temperature switch or the low temperature switch of warm braw control switch, send the instruction through vehicle control unit: the whole warm air system carries out self-checking for 5 seconds, in the self-checking process, the pipeline connections of all components on the warm air branch pipeline are in an open and intercommunicated state, cooling water flows through all the components and exhausts air in the pipeline, at the moment, the PTC liquid heater does not work, the large circulation flow sensor and the small circulation flow sensor are in a working state, flow information received by the large circulation flow sensor and the small circulation flow sensor at the 5 th second meets a preset value, and otherwise, the self-checking is prolonged for 5 seconds; after self-checking again, if the flow information received by at least one of the two sensors does not meet the preset value, judging that the heating system works abnormally, and displaying error information of the working abnormality of the heating system by the whole vehicle instrument; the warm air system is self-checked only once in one use period, namely: when the high temperature is switched to the low temperature or the low temperature is switched to the high temperature, the self-checking operation is not repeated;
as shown in fig. 4: when the warm air temperature that sets for is lower, open the low temperature switch of warm air control switch, after warm air system self-checking accomplished, send the instruction through vehicle control unit: the PTC liquid heater is in a non-working state, and a pipeline between the first three-way electromagnetic valve and the second three-way electromagnetic valve is in a cut-off state; the circulation path of the cooling water is as follows: the hot air returns to the pipeline between the water outlet of the water tank and the water pump inlet through a pipeline between the water outlet of the water tank and the water pump inlet, a first three-way electromagnetic valve, a PTC water pump, a PTC liquid heater, a warm air water tank, a second three-way electromagnetic valve and a large circulation flow sensor in sequence;
as shown in fig. 5: when the warm air temperature that sets for is higher, open the high temperature switch of warm air control switch, after warm air system self-checking accomplished, send the instruction through vehicle control unit: the PTC liquid heater is in a working state, the connection between the first three-way electromagnetic valve and the cooling circulation water path is cut off, the connection between the second three-way electromagnetic valve and the large circulation flow sensor is cut off, and a pipeline between the first three-way electromagnetic valve and the second three-way electromagnetic valve is in an open and intercommunicating state; the circulation path of the cooling water is as follows: the cooling water sequentially passes through a first three-way electromagnetic valve, a PTC water pump, a PTC liquid heater, a warm air water tank, a second three-way electromagnetic valve and a small circulation flow sensor and then returns to the first three-way electromagnetic valve, the cooling water is internally circulated in a heating branch pipeline, in the process, when the temperature of the cooling water is lower than the preset lowest temperature of the PTC liquid heater, the PTC liquid heater starts to work, and when the temperature of the cooling water exceeds the preset highest temperature of the PTC liquid heater, the PTC liquid heater stops working; when leakage occurs and the flow cannot meet the preset value of the small circulation flow sensor, the whole vehicle instrument displays error information of abnormal working of the warm air system.
Those skilled in the art will appreciate that the details of the present invention are not described in detail herein.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
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