CN109488483B - Vehicle heat exchange system - Google Patents
Vehicle heat exchange system Download PDFInfo
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- CN109488483B CN109488483B CN201811295068.1A CN201811295068A CN109488483B CN 109488483 B CN109488483 B CN 109488483B CN 201811295068 A CN201811295068 A CN 201811295068A CN 109488483 B CN109488483 B CN 109488483B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
- F01M5/021—Conditioning lubricant for aiding engine starting, e.g. heating by heating
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
- H02N11/002—Generators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention relates to the field of vehicle heat dissipation systems, in particular to a vehicle heat exchange system; it is an object to provide a vehicle heat exchange system; the technical scheme is as follows: the cooling system comprises a cooling liquid tank and a first electric control proportional valve connected with an outlet of the cooling liquid tank, wherein the cooling liquid tank is matched with a circulating pump, the first electric control proportional valve is connected with a first cooling pipeline of an engine, and the first cooling pipeline is connected with a heat exchange tank after passing through an electronic thermometer and a second electric control proportional valve in sequence; the heat exchange box is connected with the heat accumulator, the heat accumulator is connected with the cooling liquid box, the inlet of the heat accumulator is also connected with a third electric control proportional valve, and the other end of the third electric control proportional valve is directly connected with the front end of the second electric control proportional valve; the thermoelectric generator is connected with an automobile power supply system through a voltage stabilizing circuit; the whole system is controlled by the ECU to operate. The fuel oil recycling device has the characteristics of high fuel oil utilization efficiency, simple structure, economy and environmental protection.
Description
Technical Field
The invention relates to the field of vehicle cooling systems, in particular to a vehicle heat exchange system.
Background
China has become a big world for automobile production and marketing, the automobile keeping quantity is also increased year by year, and the subsequent problems of environment, energy and the like are continuously worsened. The energy conservation and emission reduction become the development trend of the automobile industry in China, and the key measure for responding to the establishment of an environment-friendly and resource-saving social call is provided, so that hybrid power and pure electric vehicles appear. However, under the current situations that the cruising ability of a pure electric vehicle is insufficient, and the hybrid power structure is complex and high in cost, the fuel vehicle still has huge reserve and market demands.
According to survey data, the thermal efficiency of the conventional automobile engine is only about 30%, and the rest energy is dissipated in the forms of engine cooling, automobile exhaust, friction loss and the like. The ratio of the heat taken away by the exhaust gas is about 1/3, and the exhaust gas exchange system has a plurality of treatment modes, such as EGR (exhaust gas recirculation), a thermoelectric generator arranged at the tail end of a three-way catalyst and the like. The ratio of heat taken away by an automobile engine is about 1/3, but most of the fuel vehicles are used for dissipating redundant heat to the environment through an evaporator and a fan; if the part of heat is used for generating electricity, not only can energy be saved, but also the composition of an automobile heat dissipation system can be reduced, the fuel utilization efficiency is high, the use cost of an automobile can be reduced, and the automobile heat dissipation system is economical and environment-friendly. Some patents combine an engine cooling system with a lubricating oil system and a heating system of a vehicle, but the utilization of heat radiated by the engine cooling system is far from sufficient.
Disclosure of Invention
The invention aims to provide a vehicle heat exchange system which is simple in structure and high in heat recovery and utilization rate.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the cooling system comprises a cooling liquid tank and a first electric control proportional valve connected with an outlet of the cooling liquid tank, wherein the cooling liquid tank is matched with a circulating pump, the first electric control proportional valve is connected with a first cooling pipeline of an engine, and the first cooling pipeline is connected with a heat exchange tank after passing through an electronic thermometer and a second electric control proportional valve in sequence; the heat exchange box is connected with a heat accumulator, the heat accumulator is connected with a cooling liquid box, the inlet of the heat accumulator is also connected with a third electric control proportional valve, and the other end of the third electric control proportional valve is directly connected with the front end of the second electric control proportional valve; the thermoelectric generator is connected with an automobile power supply system through a voltage stabilizing circuit; and the circulating pump, the first electric control proportional valve, the electronic thermometer, the second electric control proportional valve and the third electric control proportional valve are respectively and electrically connected with the automobile ECU.
Preferably, the outlet of the cooling liquid tank is further provided with an electronic monitoring thermometer, the outlet of the heat accumulator is further connected with an electric control switch valve, the other end of the electric control switch valve is connected with the cooling liquid tank after being sequentially connected with the auxiliary cooling liquid tank and the check valve, and the electronic monitoring thermometer and the electric control switch valve are respectively electrically connected with the ECU.
Preferably, the battery pack further comprises a second cooling pipeline arranged in the battery pack, an inlet of the second cooling pipeline is connected with the cooling liquid tank through a fourth electric control proportional valve, and an outlet of the second cooling pipeline is connected with the front end of the second electric control proportional valve.
Preferably, the system further comprises a passenger cabin heating pipeline filled with working media, and the heating pipeline is connected with the heat accumulator and forms a loop after passing through the electronic pump and the fifth electric control proportional valve in sequence.
Preferably, both ends of the heat exchange box are wedge-shaped, and the middle part of the heat exchange box is square.
Preferably, the section of the hot end of the thermocouple of the thermoelectric generator is flat.
Preferably, the width direction of the thermocouples positioned in the front end of the heat exchange box is parallel to the side wall of the front end of the heat exchange box, the thermocouples positioned in the middle of the heat exchange box are arranged in a splayed shape, and the width direction of the thermocouples positioned in the rear end of the heat exchange box is perpendicular to the flow direction of the cooling liquid.
Preferably, the heat accumulator comprises a low-temperature phase change heat accumulation module and a medium-temperature phase change heat accumulation module, a heat exchange pipeline of the heat accumulator is arranged in the low-temperature phase change heat accumulation module and the medium-temperature phase change heat accumulation module, and the heat accumulator is further provided with a temperature sensor electrically connected with the ECU.
Preferably, the second cooling pipe is composed of flat tubes inserted between the battery cells.
Preferably, the shell of the heat accumulator is of a vacuum double-layer structure, and the surface of the heat exchange box is covered with a heat insulation material.
The beneficial technical effects of the invention are as follows: on the basis of the existing cooling system, a proportional valve and a heat exchange box provided with a hot end of a thermoelectric generator are connected in series, a heat accumulator is connected in series behind the heat exchange box of the thermoelectric generator, and a bypass with a first proportional valve is connected in parallel on two sides of the heat exchange box. The heat of the engine is converted into electric energy to be stored by absorbing the heat of a cooling system by the hot electrode of the thermoelectric generator, and the heat which is not completely absorbed by the thermoelectric generator is stored by the heat accumulator, so that the heat of the engine can be fully converted into electric energy without cooling a cooling liquid by a fan and an evaporator or charging a storage battery by the engine, and the effective output torque of the engine is larger and has a simple structure. Meanwhile, the heat stored by the heat accumulator can quickly preheat the cooling liquid, namely the lubricating oil of the engine, so that the engine can enter the optimal working state more quickly. Therefore, the invention has the characteristics of high fuel utilization efficiency, simple structure, economy and environmental protection.
Drawings
FIG. 1 is a schematic diagram of the system connection of the present invention;
figure 2 is a cross-sectional schematic view of a heat exchange cabinet of the present invention;
fig. 3 is a schematic view of a thermocouple of the thermoelectric generator of the present invention;
fig. 4 is a schematic cross-sectional view of the regenerator structure of the present invention.
Detailed Description
So that the manner in which the features and advantages of the invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings.
With reference to fig. 1 to 3, a vehicle heat exchange system comprises a coolant tank 1 and a first electronic control proportional valve 2 connected to an outlet of the coolant tank 1, wherein the coolant tank 1 is adapted with a circulating pump 9, and the first electronic control proportional valve 2 is connected to a first cooling pipeline 3 of an engine; the first cooling pipeline 3 is connected with a heat exchange box 5 through an electronic thermometer 14 and a second electronic control proportional valve 4 in sequence, the heat exchange box 5 is connected with a heat accumulator 6, an outlet of the heat accumulator 6 is connected with a cooling liquid tank 1, an inlet of the heat accumulator 6 is also connected with a third electronic control proportional valve 7, and the other end of the third electronic control proportional valve 7 is directly connected with the front end of the second electronic control proportional valve 4; the thermoelectric generator 8 is characterized by further comprising a thermoelectric generator 8, wherein the thermoelectric couple hot end of the thermoelectric generator 8 is installed in the heat exchange box 5, and the thermoelectric generator 8 is connected with an automobile power supply system through a voltage stabilizing circuit; and the circulating pump 9, the first electric control proportional valve 2, the electronic thermometer 14, the second electric control proportional valve 4 and the third electric control proportional valve 7 are respectively electrically connected with the automobile ECU.
Specifically, the coolant in the whole heat exchange system is powered by the circulating pump 9 to circulate, and the electronic thermometer 14 can monitor the temperature at the outlet of the first cooling pipeline 3, that is, the temperature of the engine and the lubricating oil inside the engine can be monitored in real time through the data of the electronic thermometer 14. The first electric control proportional valve 2 controls the flow of the cooling liquid entering the first cooling pipeline 3, and the second electric control proportional valve 4 controls the flow of the cooling liquid entering the heat exchange box 5; and the third electric control proportional valve 7 is connected with a pipeline consisting of the second electric control proportional valve 4 and the heat exchange box 5 in parallel, and the flow of the cooling liquid entering the heat exchange box 5 and the heat accumulator 6 can be distributed by the third electric control proportional valve. Meanwhile, the thermoelectric generator 8 comprises a thermocouple 81 and a collector plate, wherein the thermocouple 81 comprises N/P made of semiconductor and arranged in the heat exchange box 5, the N/P can convert the heat energy of the cooling liquid in the heat exchange box 5 into electric energy through the outside of the heat exchange box 5, and is connected with a power supply system of the automobile through the collector plate by a voltage stabilizing circuit so as to convert the heat energy into the electric energy for storage.
The heat accumulator 6 is a heat accumulating type heat exchanger, phase-change materials are filled in the heat accumulator, and the heat accumulator is provided with metal pipelines which are communicated in an array manner; the heat accumulator made of phase-change material is used as heat transfer surface to exchange heat with metal pipeline in it, and absorbs and releases heat by phase change of phase-change material. A phase change material is a new chemical material capable of storing thermal energy, which performs biological phase change under a certain temperature condition (phase change temperature) and stores thermal energy along with absorbing heat. It stores heat and releases it when necessary, thus improving the utilization rate of energy. Taking the solid-liquid phase change as an example, the solid-liquid phase change can be changed into the liquid state from the solid state after absorbing heat, so that the heat collection is realized, and the heat release is realized when the liquid-liquid phase change is changed into the solid state. All electrical elements are controlled by the ECU of the automobile during the operation of the whole system, and the combined operation with other systems of the automobile can be realized.
Further, an electronic monitoring thermometer 141 is further arranged at the outlet of the cooling liquid tank 1, an electric control switch valve 20 is further connected to the outlet of the heat accumulator 6, the other end of the electric control switch valve 20 is connected with the cooling liquid tank 1 after being sequentially connected with the auxiliary cooling liquid tank 101 and the check valve 201, and the electronic monitoring thermometer 141 and the electric control switch valve 20 are respectively electrically connected with the ECU. It should be understood that the check valve 201 can prevent water flowing out of the accumulator 6 from entering the secondary coolant tank 101 when the electronically controlled on-off valve 20 is in the closed state. When the electrically controlled on-off valve 20 is opened, a part of the water flowing out of the heat accumulator 6 directly flows back to the coolant tank 1, and a part of the water flows into the sub-coolant tank 101. The coolant flows into the sub-coolant tank 101 and mixes with the low-temperature cold zone stored in the sub-coolant tank 101, and then flows into the coolant tank 1. The ECU can monitor the temperature of the coolant output from the coolant tank 1 in real time by the electronic monitoring thermometer 141 to determine whether the operating state of the heat exchange system is good.
Further, the battery pack further comprises a second cooling pipeline 10 arranged in the battery pack, an inlet of the second cooling pipeline 10 is connected with the cooling liquid tank 1 through a fourth electric control proportional valve 11, and an outlet of the second cooling pipeline 10 is connected with the front end of the second electric control proportional valve 4. That is to say, through the flow of coolant liquid at second cooling pipeline 10, can send into heat exchange box 5 with the heat that the group battery during operation produced, realize the thermal recycle who produces the group battery and cool down it, guarantee that the car battery can normally work.
Furthermore, the system also comprises a passenger cabin heating pipeline 12 filled with working media, wherein the heating pipeline 12 is connected with the heat accumulator 6 after passing through an electronic pump 15 and a fifth electric control proportional valve 13 in sequence to form a loop. It will be understood that the heating circuit 12 of the passenger compartment is arranged between the engine compartment and the passenger compartment, opposite the latter, and is connected to the cooling system via a different heat exchange circuit and the heat accumulator 6. When the passenger cabin needs to be heated, the fan 121 and the electronic pump 15 which are right opposite to the heating pipeline 12 are controlled by the ECU, the working medium in the heating pipeline 12 is circulated by the electronic pump 15, the heat of the heat accumulator 6 is absorbed by the working medium, and then the cold air output by the fan 121 absorbs the heat of the heating pipeline 12 and is sent into the passenger cabin, so that the passenger cabin is heated. The ECU controls the flow of the fifth electric control proportional valve 13, so that the temperature in the passenger compartment can be controlled.
Furthermore, the two ends of the heat exchange box 5 are wedge-shaped, the middle part of the heat exchange box is square, and the front end of the heat exchange box is wedge-shaped, namely horn-shaped, so that the cooling liquid can be rapidly diffused in the heat exchange box 5; the middle part is set to be square, so that the number of the distributed thermocouples can be increased, and the power generation power of the thermoelectric generator 8 is improved; the rear end is set to be wedge-shaped, so that the outlet of the cooling liquid is reduced, the resistance of the cooling liquid to be discharged is increased, the stay time of the cooling liquid is prolonged, and the cooling liquid and the thermocouple are subjected to sufficient heat exchange.
Furthermore, the section of the hot end of the thermocouple 81 of the thermoelectric generator 8 is flat, so that the effective contact area between the thermocouple and the cooling liquid is increased, and the heat exchange efficiency of the thermocouple and the cooling liquid is improved.
Furthermore, the width direction of the thermocouples 81 located inside the front end of the heat exchange box 5 is parallel to the side wall of the front end of the heat exchange box 5, the thermocouples located in the middle of the heat exchange box 5 are arranged in a splayed shape, and the width direction of the thermocouples 81 located at the rear end of the heat exchange box 5 is perpendicular to the flow direction of the cooling liquid. It should be understood that when the cooling liquid enters the box body from the front end of the heat exchange box 5, the hot end of the thermocouple 81 at the front end functions as a shunt, so that the cooling liquid is uniformly distributed in the heat exchange box 5; the thermocouple 81 in the middle part can play a role of turbulent flow, so that the cooling liquid is in full collision contact with the hot end of the thermocouple 81 to perform full heat exchange; and finally, the hot end of the thermocouple 81 at the rear end plays a role in choked flow, so that the retention time of the cooling liquid in the heat exchange box 5 is prolonged, the sufficient heat exchange is ensured, the heat energy conversion efficiency is improved, and the generated energy is improved.
Further, the heat accumulator 6 includes a low-temperature phase change heat accumulation module and a medium-temperature phase change heat accumulation module, and the heat exchange pipeline thereof is arranged in the low-temperature phase change heat accumulation module and the medium-temperature phase change heat accumulation module. It can be known that the heat accumulator 6 is provided with a low-temperature and medium-temperature phase change heat accumulation module, which can increase the temperature range and heat accumulation amount of the heat accumulator. Specifically, when the temperature of the cooling liquid is lower than the low temperature, the low-temperature phase change heat storage module mainly absorbs heat, and when the temperature is too high, the medium-temperature heat storage module mainly absorbs heat, and the heat release process is opposite. In addition, the heat accumulator 6 is also provided with a temperature sensor electrically connected with the ECU, so that the ECU can monitor the heat storage capacity of the heat accumulator 6 in real time, and control the action of each proportional valve more reasonably, thereby preventing the heat absorbed by the heat accumulator 6 from being too low to meet the use function of the heat accumulator.
Further, the second cooling pipeline 10 is composed of flat tubes inserted between the battery cells, so that heat emitted by the battery during operation can be sufficiently absorbed by the cooling liquid, and the heat recovery efficiency is improved.
Furthermore, the shell of the heat accumulator 6 is of a vacuum double-layer structure, so that the heat accumulator 6 can be prevented from exchanging heat with the outside, and the situation that the heat accumulator 6 cannot preheat the cooling liquid after the automobile is not used for a long time is prevented. The surface of the heat exchange box 5 is coated with a heat insulation material, so that the cooling liquid in the electrode box 5 can be prevented from exchanging heat with the outside through the shell of the heat exchange box, the heat loss is reduced, the temperature difference between the hot end and the cold end of the thermocouple 81 is increased, and the thermoelectromotive force is improved.
The working process and the operation principle of the invention are as follows:
when the automobile is produced and assembled, the storage battery needs to be charged firstly, in addition, the engine lacks a part for generating electricity to charge the storage battery, an evaporator and a fan are not arranged in the system, and the reserved space is enough for accommodating the heat exchange box 5, the thermoelectric generator 8 and the heat accumulator 6, so that the whole size of the automobile does not need to be changed only by installing the heat exchange box 5, the thermoelectric generator 8 and the heat accumulator 6 at proper positions in an engine bin. The "coolant" used in the automobile refers to a cooling medium circulating in the engine water-cooling circulation system, and may be, for example, water or antifreeze of various brands.
Meanwhile, the first cooling pipeline 3 is arranged in the shell of the engine and is not different from the prior art, when the engine is started or waste heat is still generated after the engine is stopped, the circulating cooling liquid is driven by the circulating pump 9 to exchange heat with the engine, and the heat of the engine is taken away. The warmed coolant is controlled by the ECU to flow through the heat exchange box 5 and/or the heat accumulator 6 by the second electric control proportional valve 4 and the third electric control proportional valve 7, and the thermoelectric generator 8 converts the heat energy of the coolant into electric energy through a plurality of thermocouples 81 with hot ends arranged in the heat exchange box 5 and stores the electric energy or directly uses the electric energy through a power supply system of the automobile. The heat accumulator 6 stores the heat which cannot be completely absorbed by the thermoelectric generator 8 or directly stores the heat of the cooling liquid for other purposes.
When the automobile is used for the first time, the engine is started through the electricity pre-charged by the storage battery, the ECU controls the circulating pump 9 to work to circulate the cooling liquid in the cooling liquid tank 1, and controls the first electronic control proportional valve 2 to gradually increase the flow of the circulated cooling liquid, so that the engine can be rapidly heated, even if the lubricating oil is rapidly heated, the lubricating oil rapidly enters the optimal working state, and the energy consumption is reduced. In the process, the second electronic control proportional valve 4 is controlled to be fully closed, the third electronic control proportional valve 7 is controlled to be fully opened, namely the thermoelectric generator 8 does not work at the moment, and the heat collected by the cooling liquid is absorbed by the heat accumulator 6. When the temperature in the low-temperature module of the heat accumulator 6 reaches the temperature of complete phase change, the second electric control proportional valve 4 is gradually opened and the third electric control proportional valve 7 is gradually closed, so that the flow of cold area liquid entering the heat exchange box 5 is gradually increased, and the electric energy generated by the thermoelectric generator 8 is prevented from being greatly increased to damage a power supply circuit. At this time, the thermoelectric generator 8 stores the heat. And the flow of the cooling liquid entering the engine is controlled through the first electric control proportional valve 2, so that the working temperature of the engine is controlled and maintained at the optimal working temperature.
Meanwhile, when the temperature of the storage battery is too high, the fourth electric control proportional valve 11 is opened, heat generated during the operation of the battery pack can be fed into the heat exchange box 5 through the flowing of the cooling liquid in the second cooling pipeline 10, the heat generated by the battery pack is recycled, the temperature of the heat is reduced, and the normal operation of the automobile battery is ensured. In this process, the cooling liquids in the second cooling line 10 and the first cooling line 3 are independent from each other and are input from the cooling liquid tank 1, that is, both are subjected to heat exchange cooling with the heat exchange tank 5 and the heat accumulator 6; therefore, mutual influence cannot be generated, and the storage battery can be cooled.
When hot air is needed in the passenger cabin, the electronic pump 15 is started, the fifth electric control proportional valve 13 and the fan 121 which is right opposite to the heating pipeline 12 are started to supply heat to the passenger cabin, and the ECU controls the flow of the fifth electric control proportional valve 13 to regulate the temperature. And extra heat sources such as electric energy and the like are not needed, the energy consumption is low, and the energy utilization rate is improved. Moreover, the invention can eliminate the high-voltage electric heater and save the cost of the whole vehicle. In the process, when the temperature in the middle temperature module of the heat accumulator 6 reaches the temperature of complete reverse phase change, the second electric control proportional valve 4 is controlled to be fully closed, and the third electric control proportional valve 7 is controlled to be fully opened, so that the heat carried by the cooling liquid directly exchanges heat with a heating system of a passenger cabin in the heat accumulator 6, and the heat stored in the heat accumulator 6 is prevented from being too little.
And when the automobile is restarted, the circulating pump 9 is started, and the ECU controls the first electric control proportional valve 2 to be fully opened, the second electric control proportional valve 4 to be fully closed and the third electric control proportional valve 7 to be fully opened. At the moment, the heat exchange box 5 and the thermoelectric generator 8 are not connected into an engine cooling circulation system, and the engine is heated by absorbing heat in the heat accumulator 6 through the cooling liquid at the maximum cooling liquid circulation flow rate, so that the engine enters the optimal working state in a short time, and the engine preheating time is shortened.
In addition, when the heat exchange system or the engine works abnormally, the ECU opens the electric control switch valve 20, so that part of the cooling liquid flowing out of the heat accumulator 6 flows into the auxiliary cooling liquid tank 101, and the low-temperature cooling liquid originally stored in the auxiliary cooling liquid tank 101 is taken out and flows back to the cooling liquid tank 1, thereby playing a role in assisting cooling and temperature reduction within a period of time; meanwhile, the ECU sends out warning to the driver through the automobile display screen to prompt the driver to take corresponding emergency measures, so that the driving safety is guaranteed.
By the working principle and the working mode, the heat of the engine can be recycled, and the heat does not need to be radiated outwards by the evaporator and the fan; the collected heat can be used for generating power, heating and preheating an engine, so that the utilization rate of fuel oil is improved, and the device is economical and environment-friendly. The engine is not required to generate power, the output torque of the engine is increased, and the output performance of the vehicle is improved.
Claims (7)
1. A vehicle heat exchange system comprises a cooling liquid tank (1) and a first electric control proportional valve (2) connected with an outlet of the cooling liquid tank (1), and is characterized in that:
the cooling liquid tank (1) is matched with a circulating pump (9), the first electric control proportional valve (2) is connected with a first cooling pipeline (3) of an engine, and the first cooling pipeline (3) is connected with the heat exchange tank (5) after passing through an electronic thermometer (14) and a second electric control proportional valve (4) in sequence;
the heat exchange box (5) is connected with a heat accumulator (6), the heat accumulator (6) is connected with the cooling liquid box (1), the inlet of the heat accumulator (6) is also connected with a third electric control proportional valve (7), and the other end of the third electric control proportional valve (7) is directly connected with the front end of the second electric control proportional valve (4);
the automobile thermoelectric conversion system is characterized by further comprising a thermoelectric generator (8), wherein the thermoelectric couple hot end of the thermoelectric generator (8) is installed in the heat exchange box (5), and the thermoelectric generator (8) is connected with an automobile power supply system through a voltage stabilizing circuit;
the circulating pump (9), the first electric control proportional valve (2), the electronic thermometer (14), the second electric control proportional valve (4) and the third electric control proportional valve (7) are respectively electrically connected with an automobile ECU (electronic control unit);
the width direction of the thermocouples positioned in the front end of the heat exchange box (5) is parallel to the side wall of the front end of the heat exchange box (5), the thermocouples positioned in the middle of the heat exchange box (5) are arranged in a splayed shape, and the width direction of the thermocouples positioned at the rear end of the heat exchange box (5) is vertical to the flowing direction of the cooling liquid;
an outlet of the cooling liquid tank (1) is further provided with an electronic monitoring thermometer (141), an outlet of the heat accumulator (6) is further connected with an electric control switch valve (20), the other end of the electric control switch valve (20) is connected with the cooling liquid tank (1) after being sequentially connected with the auxiliary cooling liquid tank (101) and the one-way valve (201), and the electronic monitoring thermometer (141) and the electric control switch valve (20) are respectively and electrically connected with the ECU;
the battery pack further comprises a second cooling pipeline (10) arranged in the battery pack, an inlet of the second cooling pipeline (10) is connected with the cooling liquid tank (1) through a fourth electric control proportional valve (11), and an outlet of the second cooling pipeline (10) is connected with the front end of a second electric control proportional valve (4);
when the automobile is restarted, the circulating pump (9) is started, the ECU controls the first electric control proportional valve (2) to be fully opened, the second electric control proportional valve (4) to be fully closed and the third electric control proportional valve (7) to be fully closed, the heat exchange box (5) and the thermoelectric generator (8) are not connected into an engine cooling circulation system, and cooling liquid absorbs heat in the heat accumulator (6) to heat the engine.
2. The vehicle heat exchange system according to claim 1, wherein: the passenger cabin heating system is characterized by further comprising a passenger cabin heating pipeline (12) filled with working media, wherein the heating pipeline (12) is connected with the heat accumulator (6) and forms a loop after passing through the electronic pump (15) and the fifth electric control proportional valve (13) in sequence.
3. The vehicle heat exchange system according to claim 1, wherein: the two ends of the heat exchange box (5) are wedge-shaped, and the middle part of the heat exchange box is square.
4. The vehicle heat exchange system according to claim 3, wherein: the section of the hot end of the thermocouple of the thermoelectric generator (8) is flat.
5. The vehicle heat exchange system according to claim 1, wherein: the heat accumulator (6) comprises a low-temperature phase change heat accumulation module and a medium-temperature phase change heat accumulation module, and heat exchange pipelines of the heat accumulator are arranged in the low-temperature phase change heat accumulation module and the medium-temperature phase change heat accumulation module; the heat accumulator (6) is also provided with a temperature sensor electrically connected with the ECU.
6. The vehicle heat exchange system according to claim 1, wherein: the second cooling duct (10) is composed of flat tubes inserted between the battery cells.
7. The vehicle heat exchange system according to claim 1, wherein: the shell of the heat accumulator (6) is of a vacuum double-layer structure, and the surface of the heat exchange box (5) is covered with a heat insulating material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811295068.1A CN109488483B (en) | 2018-11-01 | 2018-11-01 | Vehicle heat exchange system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811295068.1A CN109488483B (en) | 2018-11-01 | 2018-11-01 | Vehicle heat exchange system |
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| CN109488483A CN109488483A (en) | 2019-03-19 |
| CN109488483B true CN109488483B (en) | 2022-07-19 |
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| CN114279088A (en) * | 2022-01-10 | 2022-04-05 | 应雪汽车科技(常熟)有限公司 | Vehicle-mounted energy storage system and working method thereof |
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