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CN115195392B - Integrated whole vehicle central thermal management system for hybrid electric vehicle - Google Patents

Integrated whole vehicle central thermal management system for hybrid electric vehicle Download PDF

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Publication number
CN115195392B
CN115195392B CN202210629170.0A CN202210629170A CN115195392B CN 115195392 B CN115195392 B CN 115195392B CN 202210629170 A CN202210629170 A CN 202210629170A CN 115195392 B CN115195392 B CN 115195392B
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outlet
way valve
interface
inlet
branch
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Chinese (zh)
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CN115195392A (en
Inventor
王轩
殷艺玮
田华
舒歌群
王瑞
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Tianjin University
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Tianjin University
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Priority to CN202210629170.0A priority Critical patent/CN115195392B/en
Priority to PCT/CN2022/110783 priority patent/WO2023236342A1/en
Publication of CN115195392A publication Critical patent/CN115195392A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
    • B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
    • B60H1/004—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for vehicles having a combustion engine and electric drive means, e.g. hybrid electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
    • B60H1/143—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
    • H05K7/20281—Thermal management, e.g. liquid flow control

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The invention discloses an integrated whole vehicle central heat management system for a hybrid electric vehicle, which comprises an internal combustion engine, a flue gas heat exchanger, an expander, a heat regenerator, a compressor, a cylinder liner water heat exchanger, a charge air heat exchanger, an EGR (exhaust gas recirculation) heat exchanger, a condenser, a storage tank, a working medium pump, a cooler, an electric appliance radiator, an in-vehicle evaporator, an in-vehicle radiator, a battery cooling evaporator, a resistance heater (PTC), an electric appliance cooling branch pump, a battery radiator and a circulating pump which are connected with each other. The integrated whole vehicle central thermal management system for the hybrid electric vehicle disclosed by the invention is scientific in design, and all the thermal management systems of the hybrid electric vehicle are efficiently coupled through the Rankine cycle internal combustion engine waste heat recovery system, so that complementary cooperation among the battery thermal management subsystem, the in-vehicle air conditioner thermal management subsystem, the electric appliance thermal management subsystem, the internal combustion engine thermal management subsystem and other subsystems is promoted, and the energy efficiency of the whole vehicle is remarkably improved.

Description

Integrated whole vehicle central thermal management system for hybrid electric vehicle
Technical Field
The invention relates to the technical field of energy utilization, in particular to an integrated whole vehicle central heat management system for a hybrid electric vehicle.
Background
For hybrid vehicles, including hybrid trucks, which have complex thermal management systems, four subsystems are mainly involved: battery thermal management subsystem, in-vehicle air conditioner thermal management subsystem, electrical apparatus thermal management subsystem and internal combustion engine thermal management subsystem.
At present, three modes are mainly adopted to improve the energy efficiency of the whole vehicle heat management system, namely, the heat load is reduced, the heat transfer efficiency is improved and the waste heat is utilized. Therefore, the integrated heat management system of the whole vehicle is established, complementary cooperation among all subsystems is promoted, and the method has great significance for improving the energy efficiency of the whole vehicle.
Many scholars at home and abroad have studied on integrated thermal management systems, but basically aim at battery thermal management, in-car air conditioner thermal management and integration of electrical appliance thermal management subsystems. The thermal management subsystem of the internal combustion engine and other thermal management subsystems are difficult to truly couple at present due to the problems of too large temperature difference and mismatching of the running time of the internal combustion engine and the battery.
Disclosure of Invention
The invention aims at solving the technical defects existing in the prior art and provides an integrated whole vehicle central heat management system for a hybrid electric vehicle.
The invention provides an integrated whole vehicle central heat management system for a hybrid electric vehicle, which comprises a waste heat recovery system branch, a refrigeration branch, a cooling water branch, an internal combustion engine waste heat branch and an in-vehicle energy supply branch;
The waste heat recovery system branch is connected with the internal combustion engine waste heat branch and is used for absorbing part of waste heat in smoke, cylinder liner water, recirculated exhaust gas EGR and pressurized air discharged by the internal combustion engine in the internal combustion engine waste heat branch and converting the part of waste heat into useful power to be output;
The refrigeration branch is connected with the cooling water branch and is used for generating low-temperature cold energy so as to maintain the temperature of cooling water, and the cooling water in the cooling water branch is ensured to have enough cold energy to maintain the normal working temperature of an electric appliance and a battery;
The cooling water branch is used for absorbing heat generated by the vehicle interior, the electric appliance and the battery through cooling water and maintaining the normal working temperature of the vehicle interior environment, the electric appliance and the battery;
The internal combustion engine waste heat branch is connected with the waste heat recovery system branch and is used for transmitting most waste heat in smoke, cylinder liner water, recirculated exhaust gas EGR and pressurized air discharged by the internal combustion engine in the internal combustion engine waste heat branch to the waste heat recovery system branch;
And the in-vehicle energy supply branch is connected with the refrigeration branch and is used for absorbing heat in the vehicle and transmitting the heat in the vehicle to the refrigeration branch.
Compared with the prior art, the integrated whole vehicle central heat management system for the hybrid electric vehicle is scientific in design, and the waste heat recovery system of the Rankine cycle internal combustion engine is used for efficiently coupling all heat management systems of the hybrid electric vehicle, so that complementary coordination among all subsystems such as a battery heat management subsystem, an in-vehicle air conditioner heat management subsystem, an electric appliance heat management subsystem and an internal combustion engine heat management subsystem is promoted, the energy efficiency of the whole vehicle is remarkably improved, and the integrated whole vehicle central heat management system has great practical significance.
Drawings
Fig. 1 is a block diagram of an integrated whole vehicle central thermal management system for a hybrid electric vehicle according to the present invention;
fig. 2 is a schematic diagram of an integrated whole vehicle central thermal management system for a hybrid electric vehicle, where a working mode of the system is in a cooling mode; in fig. 2, the broken line represents that the flow path is blocked and not flowing;
FIG. 3 is a schematic diagram of an integrated central thermal management system for a hybrid electric vehicle, wherein the working mode of the central thermal management system is in a thermoelectric mode; in fig. 3, the broken line represents that the flow path is blocked and not flowing;
Fig. 4 is a schematic diagram of an integrated whole vehicle central thermal management system for a hybrid electric vehicle according to the present invention, in which the working mode is in a heat release mode; in fig. 4, the broken line indicates that the flow path is blocked and not flowing;
Fig. 5 is a schematic diagram of an integrated whole vehicle central thermal management system for a hybrid electric vehicle according to the present invention, in which the working mode is in a charging mode, and in fig. 5, a broken line represents that a flow path is cut off and does not circulate.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1 to 5, the present invention provides an integrated whole vehicle central heat management system for a hybrid electric vehicle, comprising an internal combustion engine 1, a smoke heat exchanger 2, an expander 3, a regenerator 4, a compressor 5, a cylinder liner water heat exchanger 6, a charge air heat exchanger 7, an EGR (recirculated exhaust gas) heat exchanger 8, a condenser 9, a storage tank 10, a working medium pump 11, a cooler 12, an electric radiator 13, an in-vehicle evaporator 14, an in-vehicle radiator 15, a battery cooling evaporator 16, a resistance heater (PTC) 17, an electric cooling branch pump 18, a battery cooling branch pump 19, a battery radiator 20, and a circulation pump 21;
The invention provides an integrated whole vehicle central heat management system for a hybrid electric vehicle, which comprises a waste heat recovery system branch, a refrigeration branch, a cooling water branch, an internal combustion engine waste heat branch and an in-vehicle energy supply branch, wherein the waste heat recovery system branch is connected with the refrigeration branch;
The waste heat recovery system branch is connected with the internal combustion engine waste heat branch and is used for absorbing part of waste heat in smoke, cylinder liner water, recirculated exhaust gas EGR and pressurized air discharged by the internal combustion engine 1 in the internal combustion engine waste heat branch and converting the part of waste heat into useful power for external output (specifically, the waste heat is changed into high-temperature gaseous working medium and then drives the expansion machine 3 to expand and do work);
The refrigeration branch is connected with the cooling water branch and is used for generating low-temperature cold energy so as to maintain the temperature of cooling water, and the cooling water in the cooling water branch is ensured to have enough cold energy to maintain the normal working temperature of an electric appliance and a battery; specifically, the heat of the coolant of the air conditioner in the vehicle is absorbed by the in-vehicle evaporator 14, and the heat of the cooling water in the cooling water branch is absorbed by the battery cooling evaporator 16;
The cooling water branch is used for absorbing heat generated by the vehicle interior, the electric appliance and the battery through cooling water and maintaining the normal working temperature of the vehicle interior environment, the electric appliance and the battery;
the internal combustion engine waste heat branch is connected with the waste heat recovery system branch and is used for transmitting most waste heat in the smoke, cylinder liner water, recirculated exhaust gas EGR and pressurized air discharged by the internal combustion engine 1 in the internal combustion engine waste heat branch to the waste heat recovery system branch;
And the in-vehicle energy supply branch is connected with the refrigeration branch and is used for absorbing heat in the vehicle and transmitting the heat in the vehicle to the refrigeration branch.
The waste heat recovery system branch comprises a flue gas heat exchanger 2, a first three-way valve 111, an expander 3, a regenerator 4, a fourth three-way valve 114, a condenser 9, a first regulating valve 121, a sixth three-way valve 116, a storage tank 10, a working medium pump 11, an EGR heat exchanger 8, a charge air heat exchanger 7, a cylinder liner water heat exchanger 6, a third three-way valve 113 and a second three-way valve 112;
The refrigeration branch includes a sixth three-way valve 116, a first expansion adjustment valve 131, an in-vehicle evaporator 14, a third adjustment valve 123, a second expansion adjustment valve 132, a battery cooling evaporator 16, a fourth adjustment valve 124, a compressor 5, a fifth three-way valve 115, and a fourth three-way valve 114;
The cooling water branch includes a delivery pump 22, a battery radiator 20, a battery cooling branch pump 19, a seventh three-way valve 117, a second regulating valve 122, a battery cooling evaporator 16, a cooler 12, an electric appliance cooling branch pump 18, an electric appliance radiator 13, a resistance heater 17, and a fifth regulating valve 125;
The internal combustion engine waste heat branch comprises an internal combustion engine 1, an EGR heat exchanger 8, a charge air heat exchanger 7 and a cylinder liner water heat exchanger 6;
The in-vehicle energy supply branch circuit comprises an in-vehicle radiator 15, an in-vehicle evaporator 14 and a circulating pump 21;
in the invention, the hot side inlet of the flue gas heat exchanger 2 is connected with the flue gas outlet of the internal combustion engine 1;
The cold side inlet of the flue gas heat exchanger 2 is connected with a third interface of the second three-way valve 112;
the cold side outlet of the flue gas heat exchanger 2 is connected with a first interface of a first three-way valve 111;
A second port of the first three-way valve 111 is connected to the outlet of the expander 3;
a third port of the first three-way valve 111 is connected to the inlet of the expander 3;
The outlet of the expander 3 is also connected with the hot side inlet of the regenerator 4;
the hot side outlet of regenerator 4 is connected to the first port of the fourth three-way valve 114;
a second port of the fourth three-way valve 114 is connected to an inlet of the condenser 9 and an inlet of the first regulating valve 121, respectively;
The third port of the fourth three-way valve 114 is connected to the first port of the fifth three-way valve 115;
a second port of the second three-way valve 112 is connected with a cold side outlet of the regenerator 4;
The first port of the second three-way valve 112 is connected with the third port of the third three-way valve 113;
A second port of the third three-way valve 113 is connected with a cold side inlet of the regenerator;
A first interface of the third three-way valve 113 is connected with a cold side outlet of the cylinder liner water heat exchanger 6;
The cold side inlet of the cylinder liner water heat exchanger 6 is respectively connected with the cold side outlet of the charge air heat exchanger 7 and the cold side outlet of the EGR heat exchanger 8;
the hot side inlet of the cylinder liner water heat exchanger 6 is connected with a cylinder liner water outlet on the internal combustion engine 1;
The hot side outlet of the cylinder liner water heat exchanger 6 is connected with a cylinder liner water inlet on the internal combustion engine 1;
the cold side inlet of the charge air heat exchanger 7 is connected with the outlet of the working medium pump 11;
The outlet of the working medium pump 11 is also connected with the cold side inlet of the EGR heat exchanger 8;
the hot side inlet of the charge air heat exchanger 7 is connected to the charge air outlet on the combustion engine 1;
The hot side outlet of the charge air heat exchanger 7 is connected to the charge air inlet on the combustion engine 1;
a hot side inlet of an EGR (recirculating exhaust gas) heat exchanger 8 connected to a recirculating Exhaust Gas (EGR) outlet on the internal combustion engine 1;
The hot side outlet of the EGR heat exchanger 8 is connected to a recirculating Exhaust Gas (EGR) inlet on the combustion engine 1;
An inlet of the working medium pump 11 is connected with an outlet of the storage tank 10;
an inlet of the storage tank 10 is connected to a third port of the sixth three-way valve 116;
A first port of the sixth three-way valve 116 is connected to the outlet of the condenser 9;
a second port of the sixth three-way valve 116 is connected to the outlet of the first regulating valve 121 and the inlet of the first expansion regulating valve 131 and the inlet of the second expansion regulating valve 132, respectively;
a third port of the fifth three-way valve 115 is connected to an outlet of the compressor 5;
An inlet of the compressor 5 is connected to a second port of the fifth three-way valve 115, an outlet of the third regulating valve 123, and an outlet of the fourth regulating valve 124, respectively;
an inlet of the third regulating valve 123 is connected to a second port on the right side of the in-vehicle evaporator 14;
An inlet of the fourth regulator valve 124 is connected to a second port on the right side of the battery cooling evaporator 16;
A first port on the left side of the in-vehicle evaporator 14 is connected to the outlet of the first expansion adjustment valve 131;
a first port on the left side of the battery cooling evaporator 16 connected to the outlet of the second expansion valve 132;
a third port on the left side of the in-vehicle evaporator 14 is connected to the inlet of the circulation pump 21;
The outlet of the circulating pump 21 is connected with a first interface of the in-vehicle radiator 15;
The second interface of the in-vehicle radiator 15 is connected with the fourth interface on the right side of the in-vehicle evaporator 14;
A third port on the left side of the battery cooling evaporator 16, connected to an inlet of the resistance heater 17 (PTC) and an inlet of the battery radiator 20, respectively;
a fourth port on the right side of the battery cooling evaporator 16, connected to a third port of a seventh three-way valve 117;
a second port of the seventh three-way valve 117 is connected to an outlet of the resistance heater 17;
a first port of the seventh three-way valve 117 is connected to the outlet of the battery cooling branch pump 19;
the inlet of the battery cooling branch pump 19 is connected to the outlet of the battery radiator 20.
In the present invention, the hot side outlet of the flue gas heat exchanger 2 is connected to the outside atmosphere for exhausting the flue gas of the internal combustion engine to the atmosphere.
In the present invention, in a specific implementation, the second port of the battery radiator 20 is further connected to the second port of the second regulator valve 122;
a first port of the second regulating valve 122 is connected with an inlet of the cooler 12 and an outlet of the electric appliance radiator 13 respectively;
the outlet of the cooler 12 is respectively connected with the inlet of the electric appliance cooling branch pump 18 and the second interface of the fifth regulating valve 125;
An outlet of the electric appliance cooling branch pump 18 is connected with an inlet of the electric appliance radiator 13;
a first port of the fifth regulator valve 125 is connected to an inlet of the transfer pump 22;
The outlet of the transfer pump 22 is connected to the inlet of the battery radiator 20.
In order to more clearly understand the technical solution of the present invention, the functions of the respective constituent parts of the present invention are described below.
In the present invention, the internal combustion engine 1 functions as: the vehicle is powered by burning fuel to generate power.
The flue gas heat exchanger 2 has the functions of: the working medium absorbs the waste heat of the smoke discharged from the smoke outlet of the internal combustion engine 1, becomes high-temperature gaseous working medium and enters the inlet of the expander 3.
The function of the expander 3 is: the high-temperature gaseous working medium expands to do work, and then enters the hot side inlet of the heat regenerator 4 after being changed into the low-temperature gaseous working medium
The regenerator 4 functions as: the gaseous working medium releases heat, preheats the inlet working medium at the cold side of the flue gas heat exchanger, changes the working medium into low-temperature gaseous working medium and then enters the first interface of the fourth three-way valve 114;
the compressor 5 functions as: the gaseous working medium is compressed and boosted, and is connected with a third interface of the fifth three-way valve 115 after being changed into high-pressure gaseous working medium;
The cylinder liner water heat exchanger 6 has the functions of: the working medium absorbs the residual heat of the cylinder liner water discharged from a cylinder liner water outlet on the internal combustion engine 1, and the residual heat is changed into a high-temperature working medium and then enters a first interface of the third three-way valve 113;
The charge air heat exchanger 7 functions as: part of working medium absorbs the waste heat of the pressurized air, and enters a cold side inlet of the cylinder sleeve water heat exchanger 6 after being changed into high-temperature working medium;
the EGR (recirculating exhaust gas) heat exchanger 8 functions as: part of working medium absorbs the residual heat of the recycled exhaust gas discharged from the recycling Exhaust Gas (EGR) outlet on the internal combustion engine 1, and the working medium is changed into high-temperature working medium and then enters the cold side inlet of the cylinder sleeve water heat exchanger 6;
the condenser 9 functions as: the gaseous working medium releases heat, and enters a first interface of the sixth three-way valve 116 after being changed into liquid working medium;
The role of the storage tank 10 is: for storing a liquid working medium, feeding the liquid working medium into an inlet of the working medium pump 11;
In particular, the working medium stored in the storage tank 10 is a refrigerant, such as carbon dioxide CO 2, which can be used as a power cycle working medium.
The working fluid pump 11 functions as: the liquid working medium is pressurized, changed into high-pressure liquid working medium, and then divided into two paths, and respectively enters a cold side inlet of the EGR heat exchanger 8 and a cold side inlet of the charge air heat exchanger 7;
The role of the cooler 12 is: the cooling water releases heat, and is connected with the fifth regulating valve and the inlet of the electric appliance cooling branch pump 18 in two ways after being changed into low-temperature cooling water;
The function of the electric radiator 13 is: the cooling water absorbs heat generated by the vehicle-mounted electric appliance, and the cooling water is changed into high-temperature cooling water and enters an inlet of the cooler 12;
The in-vehicle evaporator 14 functions as: the liquid working medium absorbs the heat of the air conditioner coolant in the vehicle, and enters the inlet of the third regulating valve 123 after being changed into the gaseous working medium.
The in-vehicle radiator 15 functions as: the air-conditioning coolant absorbs heat in the vehicle and is connected with the inlet of the circulating pump 21 after being changed into high-temperature working medium
The function of the battery cooling evaporator 16 is: the liquid working medium absorbs the heat of the cooling water and is connected with the fourth regulating valve 124 after being changed into the gaseous working medium;
resistance heater (PTC) 17: the cooling water is warmed up and then is changed into high-temperature cooling water, and then is connected with the inlet of the battery radiator 20;
The appliance cooling bypass pump 18: part of the cooling water is pressurized and delivered to the inlet of the electric radiator 13;
Battery cooling bypass pump 19: the cooling water is pressurized therein and delivered to the inlet of the battery cooling evaporator 16;
Battery heat sink 20: the cooling water exchanges heat with the battery, and is connected with the inlet of the battery cooling branch pump 19 and the second regulating valve 122 after the temperature is changed;
Circulation pump 21: the heat radiation working medium is pressurized therein and delivered to the inlet of the in-vehicle radiator 15.
Delivery pump 22: for delivering cooling water to the inlet of the battery radiator 20.
In the present invention, the internal combustion engine is a vehicle internal combustion engine, and is not limited to a specific manufacturer. Other heat exchangers and pumps are not limited to a particular manufacturer and type, and any type of heat exchanger and pump that satisfies the above functions may be used.
In order to more clearly understand the technical scheme of the present invention, the working principle of the present invention is described below.
For the integrated whole vehicle central thermal management system for the hybrid electric vehicle, which is provided by the invention, the whole system is mainly divided into five branches: the system comprises a waste heat recovery system branch, a refrigeration branch, a cooling water branch, an internal combustion engine waste heat branch and an in-vehicle energy supply branch.
The working medium of the waste heat recovery system branch is the same as that of the refrigerating branch.
In the invention, in concrete realization, the working media of the waste heat recovery system branch and the refrigeration branch are the same, and carbon dioxide CO 2 or organic working media (such as R245 fa) are generally adopted as circulating working media;
In particular, the cooling water branch circuit generally adopts water as a working medium;
In the waste heat branch of the internal combustion engine, the working medium between the internal combustion engine 1 and the flue gas heat exchanger 2 and the EGR heat exchanger 8 is flue gas, the working medium between the internal combustion engine 1 and the cylinder liner water heat exchanger 6 is water, and the working medium between the internal combustion engine 1 and the booster air heat exchanger 7 is air;
in particular, the energy supply branch in the vehicle can adopt working media such as water.
Referring to fig. 2 to 5, the integrated whole vehicle central thermal management system for the hybrid electric vehicle provided by the invention comprises the following four working modes:
1. cold electric mode:
Fig. 2 is a schematic diagram of an integrated whole vehicle central thermal management system for a hybrid electric vehicle, where a working mode of the system is in a cooling mode; referring to fig. 2, in fig. 2, a broken line indicates that the flow path is blocked and does not flow;
When the vehicle runs in summer, the battery and the motor need to dissipate heat, the refrigeration capacity needs to be provided in the vehicle, and the internal combustion engine is working, the integrated whole vehicle central heat management system controls the running in a cold-electricity mode.
In this mode, first, the first regulating valve 121 is closed, the interface between the first three-way valve 111 and the outlet of the expander 3 is closed, the interface between the second three-way valve 112 and the third three-way valve 113 is closed, the interface between the fifth three-way valve 115 and the outlet of the compressor 5 is closed, and the interface between the seventh three-way valve 117 and the inlet of the resistance heater (PTC) 17 is closed;
For the waste heat recovery system branch, a hot side inlet of the flue gas heat exchanger 2 in the waste heat recovery system branch is connected with a flue gas outlet of the internal combustion engine 1, a cold side outlet of the flue gas heat exchanger 2 is connected with a first interface of the first three-way valve 111, a second interface of the first three-way valve 111 is closed, and a third interface of the first three-way valve 111 is connected with an inlet of the expander 3; the outlet of the expander 3 is connected with the hot side inlet of the regenerator 4, and the hot side outlet of the regenerator 4 is connected with the first interface of the fourth three-way valve 114; the second port of the fourth three-way valve 114 is connected with the inlet of the condenser 9, the first regulating valve 121 is closed, and the third port of the fourth three-way valve 114 is connected with the first port of the fifth three-way valve 115;
The outlet of the condenser 9 is connected with a first interface of a sixth three-way valve 116, a second interface of the sixth three-way valve 116 is connected with inlets of a first expansion regulating valve 131 and a second expansion regulating valve 132 respectively, and a third interface of the sixth three-way valve 116 is connected with an inlet of the storage tank 10;
The outlet of the storage tank 10 is connected with the inlet of the working medium pump 11, the working medium at the outlet of the working medium pump 11 is divided into two paths, one path enters the cold side inlet of the EGR heat exchanger 8, and the other path enters the cold side inlet of the charge air heat exchanger 7; the cold side outlet working medium of the EGR heat exchanger 8 and the cold side outlet working medium of the charge air heat exchanger 7 are connected with the cold side inlet of the cylinder liner water heat exchanger 6 after being converged, the cold side outlet of the cylinder liner water heat exchanger 6 is connected with the first interface of the third three-way valve 113, the second interface of the third three-way valve 113 is connected with the cold side inlet of the heat regenerator 4, and the third interface of the third three-way valve 113 is closed;
The cold side outlet of the heat regenerator 4 is connected with a second interface of a second three-way valve 112, and a third interface of the second three-way valve 112 is connected with the cold side inlet of the flue gas heat exchanger 2;
For the refrigeration branch, working medium from the second port of the sixth three-way valve 116 in the refrigeration branch is divided into two paths, one path is connected with the cold side inlet of the in-vehicle evaporator 14 through the first expansion regulating valve 131, and the cold side outlet of the in-vehicle evaporator 14 is connected with the third regulating valve 123; the other path is connected with a cold side inlet of the battery cooling evaporator 16 through a second expansion regulating valve 132, and a cold side outlet of the battery cooling evaporator 16 is connected with a fourth regulating valve 124; the working media at the outlet of the fourth regulating valve 124 and the outlet of the third regulating valve 123 are converged and then flow into the inlet of the compressor 5, and the outlet of the compressor 5 is connected with the third interface of the fifth three-way valve 115; the second port of the third three-way valve 115 is closed, and the first port of the third three-way valve 115 is connected with the third port of the fourth three-way valve 114;
For the cooling water branch, the outlet of the battery radiator 20 in the cooling water branch is divided into two paths, one path is connected with the inlet of the battery cooling branch pump 19, the outlet of the battery cooling branch pump 19 is connected with the first interface of the seventh three-way valve 117, and the other path is connected with the second regulating valve 122; the second port of the seventh three-way valve 117 is closed, and the third port of the seventh three-way valve 117 is connected to the hot side inlet (in this case, the fourth port) of the battery cooling evaporator 16;
the outlet of the second regulating valve 122 is connected with the inlet of the cooler 12, the outlet of the cooler 12 is divided into two paths, one path is connected with the inlet of the electric appliance cooling branch pump 18, the outlet of the electric appliance cooling branch pump 18 is connected with the inlet of the electric appliance radiator 13, and the outlet of the electric appliance radiator 13 is converged into the inlet of the cooler 12; the other path is connected with a fifth regulating valve 125, the working medium at the outlet of the fifth regulating valve 125 is connected with the inlet of a delivery pump 22, and the outlet of the delivery pump 22 is connected with the inlet of the battery radiator 20 after being converged with the working medium at the outlet of the hot side of the battery cooling evaporator 16.
For the engine exhaust heat branch, EGR (recirculated exhaust gas) of the engine 1 in the engine exhaust heat branch enters the EGR heat exchanger 8 from a hot side inlet of the EGR heat exchanger 8, and returns to the engine 1 from a hot side outlet of the EGR heat exchanger 8; the charge air of the combustion engine 1 enters the charge air heat exchanger 7 from the hot side inlet of the charge air heat exchanger 7 and returns to the combustion engine 1 from the hot side outlet of the charge air heat exchanger 7; cylinder liner water of the internal combustion engine 1 enters the cylinder liner water heat exchanger 6 from a hot side inlet of the cylinder liner water heat exchanger 6, and returns to the internal combustion engine 1 from a hot side outlet of the cylinder liner water heat exchanger 6.
For the in-vehicle power supply branch, the outlet of the in-vehicle radiator 15 in the in-vehicle power supply branch is connected to the hot side inlet of the in-vehicle evaporator 14, the hot side outlet of the in-vehicle evaporator 14 is connected to the inlet of the circulation pump 21, and the outlet of the circulation pump 21 is connected to the inlet of the in-vehicle radiator 15.
2. Thermoelectric mode:
FIG. 3 is a schematic diagram of an integrated central thermal management system for a hybrid electric vehicle, wherein the working mode of the central thermal management system is in a thermoelectric mode; referring to fig. 3, in fig. 3, a broken line indicates that the flow path is blocked and does not flow;
when the vehicle runs in winter, the battery needs to be heated, the motor needs to radiate heat, the vehicle needs to provide heating quantity, and the internal combustion engine is working, the integrated whole vehicle central heat management system controls the operation in a thermoelectric mode.
In this mode, first, the second regulating valve 122 and the fifth regulating valve 125 are closed, the interface between the third three-way valve 113 and the second three-way valve 112 is closed, the interface between the first three-way valve 111 and the outlet of the expander 3 is closed, the interface between the sixth three-way valve 116 and the outlet of the first regulating valve 121 is closed, and the interface between the fifth three-way valve 115 and the outlet of the compressor 5 is closed;
for the waste heat recovery system branch, at the moment, the hot side inlet of the flue gas heat exchanger 2 in the waste heat recovery system branch is connected with the flue gas outlet of the internal combustion engine 1, the cold side outlet of the flue gas heat exchanger 2 is connected with the first interface of the first three-way valve 111, the third interface of the three-way valve 111 is connected with the inlet of the expansion machine 3, and the second interface of the three-way valve 111 is closed;
the outlet of the expander 3 is connected with the hot side inlet of the regenerator 4, and the hot side outlet of the regenerator 4 is connected with the first interface of the fourth three-way valve 114; the second port of the fourth three-way valve 114 is connected with the inlet of the condenser 9 and the first regulating valve 121, and the third port of the fourth three-way valve 114 is connected with the first port of the fifth three-way valve 115;
the outlet of the condenser 9 is connected with a first port of a sixth three-way valve 116, a second port of the sixth three-way valve 116 is closed, and a third port of the sixth three-way valve 116 is connected with the inlet of the storage tank 10;
The outlet of the storage tank 10 is connected with the inlet of the working medium pump 11, the working medium at the outlet of the working medium pump 11 is divided into two paths, one path enters the cold side inlet of the EGR heat exchanger 8, and the other path enters the cold side inlet of the charge air heat exchanger 7;
The working medium at the cold side outlet of the EGR heat exchanger 8 and the working medium at the cold side outlet of the charge air heat exchanger 7 are converged and then are connected with the cold side inlet of the cylinder liner water heat exchanger 6, the cold side outlet of the cylinder liner water heat exchanger 6 is connected with the first interface of the third three-way valve 113, the second interface of the third three-way valve 113 is connected with the cold side inlet of the heat regenerator 4, the third interface of the third three-way valve 113 is closed with the first interface of the second three-way valve 112, the cold side outlet of the heat regenerator 4 is connected with the second interface of the second three-way valve 112, and the third interface of the second three-way valve 112 is connected with the cold side inlet of the flue gas heat exchanger 2;
for the refrigeration branch, the refrigeration branch becomes a heating branch at this time, and the flow direction of the working medium is opposite to that of the cooling mode, and the in-vehicle evaporator 14 and the battery cooling evaporator 16 respectively play roles of an in-vehicle heater and a battery heater at this time;
The third port of the fourth three-way valve 114 is connected with the first port of the fifth three-way valve 115, the second port of the third three-way valve 115 is connected with the third regulating valve 123 and the fourth regulating valve 124 respectively, and the third port of the fifth three-way valve 115 is closed; the outlet of the third regulating valve 123 is connected with the hot side inlet of the in-vehicle evaporator 14 (which acts as an in-vehicle heater at this time), the outlet of the fourth regulating valve 124 is connected with the hot side inlet of the battery cooling evaporator 16 (which acts as a battery heater at this time), the hot side outlets of the in-vehicle evaporator 14 and the battery cooling evaporator 16 are respectively connected with the first expansion regulating valve 131 and the second expansion regulating valve 132, the outlets of the first expansion regulating valve 131 and the second expansion regulating valve 132 converge, and then are connected with the inlet of the first regulating valve 121, and the outlet of the first regulating valve 121 is connected with the inlet of the condenser 9;
As for the cooling water branch, the cooling water branch becomes two independent circuits at this time due to the closing of the second regulating valve 122 and the fifth regulating valve 125: the first loop is a battery heating branch, when the flowing direction of working medium in the cooling water branch is opposite to that of the cooling mode, the outlet of the battery radiator 20 is respectively connected with the resistance heater 17 and the cold side inlet of the battery cooling evaporator 16 (serving as a battery heater at the moment), the cold side outlet of the battery cooling evaporator 16 (serving as a battery heater at the moment) is connected with the third interface of the three-way valve 117, the outlet of the resistance heater 17 is connected with the second interface of the seventh three-way valve 117, the first interface of the seventh three-way valve 117 is connected with the inlet of the battery heating branch pump 19, and the outlet of the battery heating branch pump 19 is connected with the inlet of the battery radiator 20;
the second loop is an electric appliance cooling branch, the outlet of the electric appliance cooling branch pump 18 is connected with the inlet of the electric appliance radiator 13, the outlet of the electric appliance radiator 13 is connected with the inlet of the cooler 12, and the outlet of the cooler 12 is connected with the inlet of the electric appliance cooling branch pump 18.
For the internal combustion engine waste heat branch, the working mode of the internal combustion engine waste heat branch is identical to that of the cold electric mode. Namely, the method is as follows: EGR (recirculating exhaust gas) of the internal combustion engine 1 in the exhaust heat branch of the internal combustion engine enters the EGR heat exchanger 8 from the hot side inlet of the EGR heat exchanger 8, and returns to the internal combustion engine 1 from the hot side outlet of the EGR heat exchanger 8; the charge air of the combustion engine 1 enters the charge air heat exchanger 7 from the hot side inlet of the charge air heat exchanger 7 and returns to the combustion engine 1 from the hot side outlet of the charge air heat exchanger 7; cylinder liner water of the internal combustion engine 1 enters the cylinder liner water heat exchanger 6 from a hot side inlet of the cylinder liner water heat exchanger 6, and returns to the internal combustion engine 1 from a hot side outlet of the cylinder liner water heat exchanger 6;
For the in-vehicle energy supply branch, when the flow direction of the working medium in the in-vehicle energy supply branch is opposite to that in the cold mode, the outlet of the in-vehicle radiator 15 is connected with the inlet of the circulating pump 21, the outlet of the circulating pump 21 is connected with the cold side inlet of the in-vehicle evaporator 14 (serving as the in-vehicle heater at the moment), and the cold side outlet of the in-vehicle evaporator 14 is connected with the inlet of the in-vehicle radiator 15.
3. Exothermic mode:
Fig. 4 is a schematic diagram of an integrated whole vehicle central thermal management system for a hybrid electric vehicle according to the present invention, in which the working mode is in a heat release mode; referring to fig. 4, in fig. 4, a broken line indicates that the flow path is blocked and does not flow;
When the vehicle runs in winter, the battery needs to be heated, the motor needs to radiate heat, the vehicle needs to provide heating quantity, and the internal combustion engine does not work, the integrated whole vehicle central heat management system controls the operation in a heat radiation mode.
In this mode, the internal combustion engine 1 is shut down, the first regulating valve 121, the second regulating valve 122 and the fifth regulating valve 125 are closed, the interface of the first three-way valve 111 and the inlet of the expander 3 is closed, the interface of the fourth three-way valve 114 and the inlet of the condenser 9 is closed, the interface of the fifth three-way valve 115 and the outlet of the compressor 5 is closed, the interface of the second three-way valve 112 and the outlet of the cold side of the regenerator 4 is closed, and the interface of the third three-way valve 113 and the inlet of the cold side of the regenerator 4 is closed.
For the waste heat recovery system branch, at the moment, the waste heat recovery system branch and the refrigeration branch (which are used as heating branches at the moment) are changed into a circulation loop, a hot side inlet of the flue gas heat exchanger 2 is connected with a flue gas outlet of the internal combustion engine 1, a cold side outlet of the flue gas heat exchanger 2 is connected with a first interface of the first three-way valve 111, a second interface of the first three-way valve 111 is connected with an outlet of the expansion machine 3, and a third interface of the first three-way valve 111 is closed;
The outlet of the expander 3 is connected with the hot side inlet of the regenerator 4, the hot side outlet of the regenerator 4 is connected with the first port of the fourth three-way valve 114, the second port of the fourth three-way valve 114 is closed, the third port of the fourth three-way valve 114 is connected with the first port of the fifth three-way valve 115, the second port of the fifth three-way valve 115 is respectively connected with the third regulating valve 123 and the fourth regulating valve 124, and the third port of the fifth three-way valve 115 is closed; the outlet of the third regulating valve 123 is connected with the hot side inlet of the in-vehicle evaporator 14 (which serves as an in-vehicle heater at this time), the outlet of the fourth regulating valve 124 is connected with the inlet of the battery cooling evaporator 16 (which serves as a battery heater at this time), the hot side outlets of the in-vehicle evaporator 14 and the battery cooling evaporator 16 are respectively connected with the first expansion regulating valve 131 and the second expansion regulating valve 132, the outlets of the first expansion regulating valve 131 and the second expansion regulating valve 132 are converged, and then the second port of the sixth three-way valve 116 is connected;
The first port of the sixth three-way valve 116 is closed and the third port of the sixth three-way valve 116 is connected to the inlet of the reservoir tank 10; the outlet of the storage tank 10 is connected with the inlet of the working medium pump 11, and the working medium at the outlet of the working medium pump 11 is divided into two paths, one path enters the cold side inlet of the EGR heat exchanger 8, and the other path enters the cold side inlet of the charge air heat exchanger 7; the working medium at the cold side outlet of the EGR heat exchanger 8 and the working medium at the cold side outlet of the charge air heat exchanger 7 are converged and then are connected with the cold side inlet of the cylinder liner water heat exchanger 6, the cold side outlet of the cylinder liner water heat exchanger 6 is connected with the first interface of the third three-way valve 113, the second interface of the third three-way valve 113 is closed, the third interface of the third three-way valve 113 is connected with the first interface of the second three-way valve 112, the second interface of the second three-way valve 112 is closed, and the third interface of the second three-way valve 112 is connected with the cold side inlet of the flue gas heat exchanger 2.
As for the cooling water branch, the cooling water branch becomes two independent circuits at this time due to the closing of the second regulating valve 122 and the fifth regulating valve 125: the first loop is a battery heating branch, when the flowing direction of working medium in the cooling water branch is opposite to that of the cooling mode, the outlet of the battery radiator 20 is respectively connected with the resistance heater 17 and the cold side inlet of the battery cooling evaporator 16, the cold side outlet of the battery cooling evaporator 16 is connected with the first interface of the three-way valve 117, the outlet of the resistance heater 17 is connected with the second interface of the seventh three-way valve 117, the third interface of the seventh three-way valve 117 is connected with the inlet of the battery heating branch pump 19, and the outlet of the battery heating branch pump 19 is connected with the inlet of the battery radiator 20;
The second loop is an electric appliance cooling branch, the outlet of an electric appliance cooling branch pump 18 is connected with the inlet of an electric appliance radiator 13, the outlet of the electric appliance radiator 13 is connected with the inlet of a cooler 12, and the outlet of the cooler 12 is connected with the inlet of the electric appliance cooling branch pump 18;
in the heat release mode, the waste heat branch of the internal combustion engine is not operated at this time.
For the in-vehicle energy supply branch, the working mode of the in-vehicle energy supply branch is identical to that of the thermoelectric mode. The method comprises the following steps: in the in-vehicle energy supply branch, the flow direction of the working medium is opposite to that of the cold electric mode, the outlet of the in-vehicle radiator 15 is connected with the inlet of the circulating pump 21, the outlet of the circulating pump 21 is connected with the cold side inlet of the in-vehicle evaporator 14 (serving as an in-vehicle heater at the moment), and the cold side outlet of the in-vehicle evaporator 14 is connected with the inlet of the in-vehicle radiator 15.
4. Heating mode:
fig. 5 is a schematic diagram of an integrated whole vehicle central thermal management system for a hybrid electric vehicle, wherein the working mode of the system is in a heating mode, as shown in fig. 5, a broken line represents that a flow path is cut off and no flow exists;
When the vehicle runs in winter, the battery needs to be heated, the motor needs to radiate heat, the vehicle needs to provide heating quantity, and the heat storage quantity in the system is insufficient, the integrated whole vehicle central heat management system controls the running in a heating mode.
In this mode, the internal combustion engine 1 is operated, closing the second regulating valve 122 and the fifth regulating valve 125, closing the interface of the first three-way valve 111 with the outlet of the expander 3, closing the interface of the fourth three-way valve 114 with the inlet of the condenser 9, closing the interface of the fifth three-way valve 115 with the outlet of the compressor 5, closing the interface of the second three-way valve 112 with the outlet of the cold side of the regenerator 4, and closing the interface of the third three-way valve 113 with the inlet of the cold side of the regenerator.
For the waste heat recovery system branch, at the moment, in the waste heat recovery system branch, a hot side inlet of the flue gas heat exchanger 2 is connected with the flue gas of the internal combustion engine 1, a cold side outlet of the flue gas heat exchanger 2 is connected with a first interface of the first three-way valve 111, a second interface of the first three-way valve 111 is connected with an outlet of the expansion machine 3, and a third interface of the first three-way valve 111 is closed;
the outlet of the expander 3 is connected with the hot side inlet of the regenerator 4, the hot side outlet of the regenerator 4 is connected with the first interface of the fourth three-way valve 114, the second interface of the fourth three-way valve 114 is connected with the first regulating valve 121, and the third interface of the fourth three-way valve 114 is connected with the first interface of the fifth three-way valve 115;
The first regulating valve 121 is connected with the second port of the sixth three-way valve 116, the first port of the sixth three-way valve 116 is closed, and the third port of the sixth three-way valve 116 is connected with the inlet of the storage tank 10;
the outlet of the storage tank 10 is connected with the inlet of the working medium pump 11, the working medium at the outlet of the working medium pump 11 is divided into two paths, one path enters the cold side inlet of the EGR heat exchanger 8, and the other path enters the cold side inlet of the charge air heat exchanger 7;
The working medium at the cold side outlet of the EGR heat exchanger 8 and the working medium at the cold side outlet of the charge air heat exchanger 7 are converged and then are connected with the cold side inlet of the cylinder liner water heat exchanger 6, the cold side outlet of the cylinder liner water heat exchanger 6 is connected with the first interface of the third three-way valve 113, the second interface of the third three-way valve 113 is closed, the third interface of the third three-way valve 113 is connected with the first interface of the second three-way valve 112, the second interface of the second three-way valve 112 is closed, and the third interface of the second three-way valve 112 is connected with the cold side inlet of the flue gas heat exchanger 2.
For the refrigeration branch, the refrigeration branch becomes a heating branch at this time, and the flow direction of the working medium is opposite to that of the cooling mode, and the in-vehicle evaporator 14 and the battery cooling evaporator 16 respectively play roles of an in-vehicle heater and a battery heater at this time;
the third port of the fourth three-way valve 114 is connected with the first port of the fifth three-way valve 115, the second port of the third three-way valve 115 is connected with the third regulating valve 123 and the fourth regulating valve 124 respectively, and the third port of the fifth three-way valve 115 is closed; the outlet of the third regulating valve 123 is connected to the hot side inlet of the in-vehicle evaporator 14, the outlet of the fourth regulating valve 124 is connected to the hot side inlet of the battery cooling evaporator 16, the hot side outlets of the in-vehicle evaporator 14 and the battery cooling evaporator 16 are respectively connected to the first expansion regulating valve 131 and the second expansion regulating valve 132, and the outlets of the first expansion regulating valve 131 and the second expansion regulating valve 132 are converged and then connected to the second port of the sixth three-way valve 116.
As for the cooling water branch, the cooling water branch becomes two independent circuits at this time due to the closing of the second regulating valve 122 and the fifth regulating valve 125: the first loop is a battery heating branch, when the flowing direction of working medium in the cooling water branch is opposite to that of the cooling mode, the outlet of the battery radiator 20 is respectively connected with the resistance heater 17 and the cold side inlet of the battery cooling evaporator 16, the cold side outlet of the battery cooling evaporator 16 is connected with the first interface of the three-way valve 117, the outlet of the resistance heater 17 is connected with the second interface of the seventh three-way valve 117, the third interface of the seventh three-way valve 117 is connected with the inlet of the battery heating branch pump 19, and the outlet of the battery heating branch pump 19 is connected with the inlet of the battery radiator 20;
The second loop is an electric appliance cooling branch, the outlet of an electric appliance cooling branch pump 18 is connected with the inlet of an electric appliance radiator 13, the outlet of the electric appliance radiator 13 is connected with the inlet of a cooler 12, and the outlet of the cooler 12 is connected with the inlet of the electric appliance cooling branch pump 18;
For the engine waste heat branch, the engine waste heat branch is in the same working mode as the thermoelectric mode. Namely, the method is as follows: EGR (recirculating exhaust gas) of the internal combustion engine 1 in the exhaust heat branch of the internal combustion engine enters the EGR heat exchanger 8 from the hot side inlet of the EGR heat exchanger 8, and returns to the internal combustion engine 1 from the hot side outlet of the EGR heat exchanger 8; the charge air of the combustion engine 1 enters the charge air heat exchanger 7 from the hot side inlet of the charge air heat exchanger 7 and returns to the combustion engine 1 from the hot side outlet of the charge air heat exchanger 7; cylinder liner water of the internal combustion engine 1 enters the cylinder liner water heat exchanger 6 from a hot side inlet of the cylinder liner water heat exchanger 6, and returns to the internal combustion engine 1 from a hot side outlet of the cylinder liner water heat exchanger 6;
For the in-vehicle energy supply branch, the working mode in the in-vehicle energy supply branch is identical to that in the thermoelectric mode. The method comprises the following steps: in the in-vehicle energy supply branch, the flow direction of the working medium is opposite to that of the cold electric mode, the outlet of the in-vehicle radiator 15 is connected with the inlet of the circulating pump 21, the outlet of the circulating pump 21 is connected with the cold side inlet of the in-vehicle evaporator 14 (serving as an in-vehicle heater at the moment), and the cold side outlet of the in-vehicle evaporator 14 is connected with the inlet of the in-vehicle radiator 15.
Compared with the prior art, the integrated whole vehicle central thermal management system for the hybrid electric vehicle has the following beneficial effects:
1. According to the technical scheme, the Rankine cycle, the refrigeration cycle and the heat supply/cooling cycle can be coupled by the same working medium, and the central heat management system with the multi-mode composite variable cycle as a core can be constructed.
2. According to the invention, the four circulation modes of the cold electric circulation, the hot electric circulation, the heat release circulation and the heat storage (heat charging) circulation are switched, so that the heat management requirements of the whole vehicle under all different conditions can be met.
3. According to the invention, the problem of temperature mismatch between high-temperature waste heat and other low-temperature heat management in the hybrid electric vehicle is effectively solved through the Rankine cycle internal combustion engine waste heat recovery system (for example, the temperature of working medium in a system part corresponding to a medium-high temperature area shown in fig. 1 is different from the temperature of working medium in a system part corresponding to a low temperature area);
4. according to the invention, the circulating working medium is used for storing waste heat and is used for maintaining the working temperature of the battery and heating the interior of the vehicle in winter, so that electric heating is avoided, and the battery endurance mileage is improved;
5. According to the invention, the requirements of the whole vehicle on different energies are balanced by allocating the work and heating and refrigerating proportions of the waste heat recovery system of the Rankine cycle internal combustion engine. Therefore, the invention can perfectly couple the whole vehicle thermal management system with high efficiency, promote complementary cooperation among all subsystems and obviously improve the energy efficiency of the whole vehicle.
In summary, compared with the prior art, the integrated whole vehicle central thermal management system for the hybrid electric vehicle provided by the invention is scientific in design, and has significant practical significance by efficiently coupling all thermal management systems of the hybrid electric vehicle through the Rankine cycle internal combustion engine waste heat recovery system, promoting complementary cooperation among all subsystems such as a battery thermal management subsystem, an in-vehicle air conditioner thermal management subsystem, an electric appliance thermal management subsystem and an internal combustion engine thermal management subsystem and the like.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (5)

1. An integrated whole vehicle central thermal management system for a hybrid electric vehicle is characterized by comprising a waste heat recovery system branch, a refrigeration branch, a cooling water branch, an internal combustion engine waste heat branch and an in-vehicle energy supply branch;
the waste heat recovery system branch is connected with the internal combustion engine waste heat branch and is used for absorbing part of waste heat in the smoke, cylinder liner water, recirculated exhaust gas EGR and pressurized air discharged by the internal combustion engine (1) in the internal combustion engine waste heat branch and converting the part of waste heat into useful work to be output to the outside;
The refrigeration branch is connected with the cooling water branch and is used for generating low-temperature cold energy so as to maintain the temperature of cooling water, and the cooling water in the cooling water branch is ensured to have enough cold energy to maintain the normal working temperature of an electric appliance and a battery;
The cooling water branch is used for absorbing heat generated by the vehicle interior, the electric appliance and the battery through cooling water and maintaining the normal working temperature of the vehicle interior environment, the electric appliance and the battery;
The internal combustion engine waste heat branch is connected with the waste heat recovery system branch and is used for transmitting most waste heat in the smoke, cylinder liner water, recirculated exhaust gas EGR and pressurized air discharged by the internal combustion engine (1) in the internal combustion engine waste heat branch to the waste heat recovery system branch;
The in-vehicle energy supply branch is connected with the refrigeration branch and is used for absorbing heat in the vehicle and transmitting the heat in the vehicle to the refrigeration branch;
The waste heat recovery system branch comprises a flue gas heat exchanger (2), a first three-way valve (111), an expander (3), a regenerator (4), a fourth three-way valve (114), a condenser (9), a first regulating valve (121), a sixth three-way valve (116), a storage tank (10), a working medium pump (11), an EGR heat exchanger (8), a charge air heat exchanger (7), a cylinder liner water heat exchanger (6), a third three-way valve (113) and a second three-way valve (112);
The refrigeration branch comprises a sixth three-way valve (116), a first expansion regulating valve (131), an in-vehicle evaporator (14), a third regulating valve (123), a second expansion regulating valve (132), a battery cooling evaporator (16), a fourth regulating valve (124), a compressor (5), a fifth three-way valve (115) and a fourth three-way valve (114);
The cooling water branch comprises a delivery pump (22), a battery radiator (20), a battery cooling branch pump (19), a seventh three-way valve (117), a second regulating valve (122), a battery cooling evaporator (16), a cooler (12), an electric appliance cooling branch pump (18), an electric appliance radiator (13), a resistance heater (17) and a fifth regulating valve (125);
the internal combustion engine waste heat branch comprises an internal combustion engine (1), an EGR heat exchanger (8), a charge air heat exchanger (7) and a cylinder sleeve water heat exchanger (6);
the in-vehicle energy supply branch comprises an in-vehicle radiator (15), an in-vehicle evaporator (14) and a circulating pump (21);
The hot side inlet of the flue gas heat exchanger (2) is connected with the flue gas outlet of the internal combustion engine (1);
the cold side inlet of the flue gas heat exchanger (2) is connected with a third interface of the second three-way valve (112);
The cold side outlet of the flue gas heat exchanger (2) is connected with a first interface of a first three-way valve (111);
a second port of the first three-way valve (111) is connected with an outlet of the expander (3);
A third port of the first three-way valve (111) is connected with an inlet of the expander (3);
The outlet of the expander (3) is also connected with the hot side inlet of the heat regenerator (4);
the hot side outlet of the heat regenerator (4) is connected with a first interface of a fourth three-way valve (114);
a second port of the fourth three-way valve (114) is respectively connected with the inlet of the condenser (9) and the inlet of the first regulating valve (121);
a third port of the fourth three-way valve (114) is connected with the first port of the fifth three-way valve (115);
A second interface of the second three-way valve (112) is connected with a cold side outlet of the heat regenerator (4);
A first port of the second three-way valve (112) is connected with a third port of the third three-way valve (113);
A second port of the third three-way valve (113) is connected with a cold side inlet of the regenerator;
a first interface of the third three-way valve (113) is connected with a cold side outlet of the cylinder sleeve water heat exchanger (6);
the cold side inlet of the cylinder sleeve water heat exchanger (6) is respectively connected with the cold side outlet of the charge air heat exchanger (7) and the cold side outlet of the EGR heat exchanger (8);
The hot side inlet of the cylinder liner water heat exchanger (6) is connected with a cylinder liner water outlet on the internal combustion engine (1);
the hot side outlet of the cylinder liner water heat exchanger (6) is connected with a cylinder liner water inlet on the internal combustion engine (1);
The cold side inlet of the charge air heat exchanger (7) is connected with the outlet of the working medium pump (11);
The outlet of the working medium pump (11) is also connected with the cold side inlet of the EGR heat exchanger (8);
A hot side inlet of the charge air heat exchanger (7) is connected with a charge air outlet on the internal combustion engine (1);
A hot side outlet of the charge air heat exchanger (7) is connected with a charge air inlet on the internal combustion engine (1);
A hot side inlet of the EGR heat exchanger (8) is connected with an EGR outlet on the internal combustion engine (1);
a hot side outlet of the EGR heat exchanger (8) is connected with an EGR inlet on the internal combustion engine (1);
An inlet of the working medium pump (11) is connected with an outlet of the storage tank (10);
An inlet of the storage tank (10) is connected with a third interface of a sixth three-way valve (116);
a first interface of a sixth three-way valve (116) is connected with the outlet of the condenser (9);
a second port of the sixth three-way valve (116) is connected with the outlet of the first regulating valve (121) and the inlet of the first expansion regulating valve (131) and the inlet of the second expansion regulating valve (132) respectively;
a third port of the fifth three-way valve (115) is connected with an outlet of the compressor (5);
an inlet of the compressor (5) is respectively connected with a second interface of the fifth three-way valve (115), an outlet of the third regulating valve (123) and an outlet of the fourth regulating valve (124);
An inlet of the third regulating valve (123) is connected with a second interface on the right side of the in-vehicle evaporator (14);
An inlet of a fourth regulating valve (124) is connected with a second interface on the right side of the battery cooling evaporator (16);
a first interface at the left side of the evaporator (14) in the vehicle is connected with an outlet of a first expansion regulating valve (131);
A first interface at the left side of the battery cooling evaporator (16) is connected with an outlet of the second expansion regulating valve (132);
A third interface at the left side of the evaporator (14) in the vehicle is connected with an inlet of a circulating pump (21);
An outlet of the circulating pump (21) is connected with a first interface of the in-vehicle radiator (15);
the second interface of the in-vehicle radiator (15) is connected with the fourth interface on the right side of the in-vehicle evaporator (14);
A third interface at the left side of the battery cooling evaporator (16) is respectively connected with an inlet of the resistance heater (17) (PTC) and an inlet of the battery radiator (20);
A fourth interface on the right side of the battery cooling evaporator (16) is connected with a third interface of a seventh three-way valve (117);
A second port of the seventh three-way valve (117) is connected with an outlet of the resistance heater (17);
a first port of a seventh three-way valve (117) is connected with an outlet of the battery cooling branch pump (19);
an inlet of the battery cooling branch pump (19) is connected with an outlet of the battery radiator (20);
the second interface of the battery radiator (20) is also connected with the second interface of the second regulating valve (122);
the first interface of the second regulating valve (122) is respectively connected with the inlet of the cooler (12) and the outlet of the electric appliance radiator (13);
The outlet of the cooler (12) is respectively connected with the inlet of the electric appliance cooling branch pump (18) and the second interface of the fifth regulating valve (125);
an outlet of the electric appliance cooling branch pump (18) is connected with an inlet of the electric appliance radiator (13);
a first port of a fifth regulating valve (125) is connected with an inlet of the delivery pump (22);
The outlet of the transfer pump (22) is connected to the inlet of the battery radiator (20).
2. The integrated whole vehicle central thermal management system for hybrid electric vehicles according to claim 1, wherein when the vehicle is running in summer, the battery and the motor need to dissipate heat, the vehicle needs to provide cooling capacity, and the internal combustion engine is operating, the integrated whole vehicle central thermal management system is controlled to operate in the following cooling mode:
In the mode, the first regulating valve (121) is closed, the interface between the first three-way valve (111) and the outlet of the expander (3) is closed, the interface between the second three-way valve (112) and the third three-way valve (113) is closed, the interface between the fifth three-way valve (115) and the outlet of the compressor (5) is closed, and the interface between the seventh three-way valve (117) and the inlet of the resistance heater (17) is closed;
for the waste heat recovery system branch, a hot side inlet of a flue gas heat exchanger (2) in the waste heat recovery system branch is connected with a flue gas outlet of an internal combustion engine (1), a cold side outlet of the flue gas heat exchanger (2) is connected with a first interface of a first three-way valve (111), a second interface of the first three-way valve (111) is closed, and a third interface of the first three-way valve (111) is connected with an inlet of an expander (3); the outlet of the expander (3) is connected with the hot side inlet of the heat regenerator (4), and the hot side outlet of the heat regenerator (4) is connected with the first interface of the fourth three-way valve (114); the second port of the fourth three-way valve (114) is connected with the inlet of the condenser (9), the first regulating valve (121) is closed, and the third port of the fourth three-way valve (114) is connected with the first port of the fifth three-way valve (115);
The outlet of the condenser (9) is connected with a first interface of a sixth three-way valve (116), a second interface of the sixth three-way valve (116) is respectively connected with inlets of a first expansion regulating valve (131) and a second expansion regulating valve (132), and a third interface of the sixth three-way valve (116) is connected with an inlet of the storage tank (10);
The outlet of the storage tank (10) is connected with the inlet of the working medium pump (11), the outlet working medium of the working medium pump (11) is divided into two paths, one path enters the cold side inlet of the EGR heat exchanger (8), and the other path enters the cold side inlet of the charge air heat exchanger (7); the cold side outlet working medium of the EGR heat exchanger (8) and the cold side outlet working medium of the charge air heat exchanger (7) are connected with the cold side inlet of the cylinder liner water heat exchanger (6), the cold side outlet of the cylinder liner water heat exchanger (6) is connected with the first interface of the third three-way valve (113), the second interface of the third three-way valve (113) is connected with the cold side inlet of the heat regenerator (4), and the third interface of the third three-way valve (113) is closed;
the cold side outlet of the heat regenerator (4) is connected with a second interface of a second three-way valve (112), and a third interface of the second three-way valve (112) is connected with the cold side inlet of the flue gas heat exchanger (2);
For the refrigerating branch, working medium from a second port of a sixth three-way valve (116) in the refrigerating branch is divided into two paths, one path is connected with a cold side inlet of an in-vehicle evaporator (14) through a first expansion regulating valve (131), and a cold side outlet of the in-vehicle evaporator (14) is connected with a third regulating valve (123); the other path is connected with a cold side inlet of the battery cooling evaporator (16) through a second expansion regulating valve (132), and a cold side outlet of the battery cooling evaporator (16) is connected with a fourth regulating valve (124); the working medium at the outlet of the fourth regulating valve (124) and the working medium at the outlet of the third regulating valve (123) are converged and then flow into the inlet of the compressor (5), and the outlet of the compressor (5) is connected with the third interface of the fifth three-way valve (115); the second port of the third three-way valve (115) is closed, and the first port of the third three-way valve (115) is connected with the third port of the fourth three-way valve (114);
For a cooling water branch, the outlet of a battery radiator (20) in the cooling water branch is divided into two paths, one path is connected with the inlet of a battery cooling branch pump (19), the outlet of the battery cooling branch pump (19) is connected with a first interface of a seventh three-way valve (117), and the other path is connected with a second regulating valve (122); the second port of the seventh three-way valve (117) is closed, and the third port of the seventh three-way valve (117) is connected with the hot side inlet of the battery cooling evaporator (16);
the outlet of the second regulating valve (122) is connected with the inlet of the cooler (12), the outlet of the cooler (12) is divided into two paths, one path is connected with the inlet of the electric appliance cooling branch pump (18), the outlet of the electric appliance cooling branch pump (18) is connected with the inlet of the electric appliance radiator (13), and the outlet of the electric appliance radiator (13) is converged into the inlet of the cooler (12); the other path is connected with a fifth regulating valve (125), an outlet working medium of the fifth regulating valve (125) is connected with an inlet of a delivery pump (22), and an outlet of the delivery pump (22) is connected with an inlet of a battery radiator (20) after being converged with an outlet working medium at the hot side of the battery cooling evaporator (16);
For an internal combustion engine waste heat branch, the recirculation exhaust gas EGR of the internal combustion engine (1) in the internal combustion engine waste heat branch enters the EGR heat exchanger (8) from a hot side inlet of the EGR heat exchanger (8) and returns to the internal combustion engine (1) from a hot side outlet of the EGR heat exchanger (8); the charge air of the internal combustion engine (1) enters the charge air heat exchanger (7) from a hot side inlet of the charge air heat exchanger (7) and returns to the internal combustion engine (1) from a hot side outlet of the charge air heat exchanger (7); cylinder liner water of the internal combustion engine (1) enters the cylinder liner water heat exchanger (6) from a hot side inlet of the cylinder liner water heat exchanger (6), and returns to the internal combustion engine (1) from a hot side outlet of the cylinder liner water heat exchanger (6);
For the energy supply branch in the vehicle, the outlet of the radiator (15) in the vehicle is connected with the hot side inlet of the evaporator (14) in the vehicle, the hot side outlet of the evaporator (14) in the vehicle is connected with the inlet of the circulating pump (21), and the outlet of the circulating pump (21) is connected with the inlet of the radiator (15) in the vehicle.
3. The integrated whole vehicle central thermal management system for a hybrid vehicle of claim 1, wherein when the vehicle is running in winter, the battery needs to be heated, the motor needs to be cooled, the vehicle interior needs to provide heating capacity, and the internal combustion engine is operating, the integrated whole vehicle central thermal management system controls the thermoelectric mode to operate in:
In the mode, the second regulating valve (122) and the fifth regulating valve (125) are closed, the interface between the third three-way valve (113) and the second three-way valve (112) is closed, the interface between the first three-way valve (111) and the outlet of the expander (3) is closed, the interface between the sixth three-way valve (116) and the outlet of the first regulating valve (121) is converged, and the interface between the fifth three-way valve (115) and the outlet of the compressor (5) is closed;
For the waste heat recovery system branch, at the moment, a hot side inlet of a flue gas heat exchanger (2) in the waste heat recovery system branch is connected with a flue gas outlet of an internal combustion engine (1), a cold side outlet of the flue gas heat exchanger (2) is connected with a first interface of a first three-way valve (111), a third interface of the three-way valve (111) is connected with an inlet of an expander (3), and a second interface of the three-way valve (111) is closed;
the outlet of the expander (3) is connected with the hot side inlet of the heat regenerator (4), and the hot side outlet of the heat regenerator (4) is connected with the first interface of the fourth three-way valve (114); the second port of the fourth three-way valve (114) is connected with the inlet of the condenser (9) and the first regulating valve (121), and the third port of the fourth three-way valve (114) is connected with the first port of the fifth three-way valve (115);
The outlet of the condenser (9) is connected with a first interface of a sixth three-way valve (116), a second interface of the sixth three-way valve (116) is closed, and a third interface of the sixth three-way valve (116) is connected with the inlet of the storage tank (10);
the outlet of the storage tank (10) is connected with the inlet of the working medium pump (11), the working medium at the outlet of the working medium pump (11) is divided into two paths, one path enters the cold side inlet of the EGR heat exchanger (8), and the other path enters the cold side inlet of the charge air heat exchanger (7);
the working medium at the cold side outlet of the EGR heat exchanger (8) is connected with the cold side inlet of the cylinder liner water heat exchanger (6) after being converged with the working medium at the cold side outlet of the charge air heat exchanger (7), the cold side outlet of the cylinder liner water heat exchanger (6) is connected with the first interface of the third three-way valve (113), the second interface of the third three-way valve (113) is connected with the cold side inlet of the heat regenerator (4), the third interface of the third three-way valve (113) is closed with the first interface of the second three-way valve (112), the cold side outlet of the heat regenerator (4) is connected with the second interface of the second three-way valve (112), and the third interface of the second three-way valve (112) is connected with the cold side inlet of the flue gas heat exchanger (2);
For the refrigerating branch, the refrigerating branch is changed into a heating branch, the flowing direction of working medium is opposite to that of a cold electric mode, and the in-vehicle evaporator (14) and the battery cooling evaporator (16) respectively play roles of an in-vehicle heater and a battery heater at the moment;
The third interface of the fourth three-way valve (114) is connected with the first interface of the fifth three-way valve (115), the second interface of the third three-way valve (115) is respectively connected with the third regulating valve (123) and the fourth regulating valve (124), and the third interface of the fifth three-way valve (115) is closed; the outlet of the third regulating valve (123) is connected with the hot side inlet of the in-vehicle evaporator (14), the outlet of the fourth regulating valve (124) is connected with the hot side inlet of the battery cooling evaporator (16), the hot side outlets of the in-vehicle evaporator (14) and the battery cooling evaporator (16) are respectively connected with the first expansion regulating valve (131) and the second expansion regulating valve (132), the outlets of the first expansion regulating valve (131) and the second expansion regulating valve (132) are converged, then the outlet of the first regulating valve (121) is connected with the inlet of the first regulating valve (121), and the outlet of the first regulating valve (121) is connected with the inlet of the condenser (9);
for the cooling water branch, the cooling water branch now becomes two independent circuits due to the closing of the second regulating valve (122) and the fifth regulating valve (125): the first loop is a battery heating branch, when the flowing direction of working medium in the cooling water branch is opposite to that of a cold electric mode, an outlet of a battery radiator (20) is respectively connected with a resistance heater (17) and a cold side inlet of a battery cooling evaporator (16), the cold side outlet of the battery cooling evaporator (16) is connected with a third interface of a three-way valve (117), an outlet of the resistance heater (17) is connected with a second interface of a seventh three-way valve (117), the first interface of the seventh three-way valve (117) is connected with an inlet of a battery heating branch pump (19), and an outlet of the battery heating branch pump (19) is connected with an inlet of the battery radiator (20);
The second loop is an electric appliance cooling branch, the outlet of an electric appliance cooling branch pump (18) is connected with the inlet of an electric appliance radiator (13), the outlet of the electric appliance radiator (13) is connected with the inlet of a cooler (12), and the outlet of the cooler (12) is connected with the inlet of the electric appliance cooling branch pump (18);
for the internal combustion engine waste heat branch, the working mode of the internal combustion engine waste heat branch is identical to that of the cold electric mode; namely, the method is as follows: the recirculation exhaust gas EGR of the internal combustion engine (1) in the internal combustion engine waste heat branch enters the EGR heat exchanger (8) from the hot side inlet of the EGR heat exchanger (8), and returns to the internal combustion engine (1) from the hot side outlet of the EGR heat exchanger (8); the charge air of the internal combustion engine (1) enters the charge air heat exchanger (7) from a hot side inlet of the charge air heat exchanger (7) and returns to the internal combustion engine (1) from a hot side outlet of the charge air heat exchanger (7); cylinder liner water of the internal combustion engine (1) enters the cylinder liner water heat exchanger (6) from a hot side inlet of the cylinder liner water heat exchanger (6), and returns to the internal combustion engine (1) from a hot side outlet of the cylinder liner water heat exchanger (6);
For the energy supply branch in the vehicle, when the flow direction of working medium in the energy supply branch in the vehicle is opposite to that in a cold electric mode, the outlet of the radiator (15) in the vehicle is connected with the inlet of the circulating pump (21), the outlet of the circulating pump (21) is connected with the cold side inlet of the evaporator (14) in the vehicle, and the cold side outlet of the evaporator (14) in the vehicle is connected with the inlet of the radiator (15) in the vehicle.
4. The integrated whole vehicle central thermal management system for a hybrid vehicle of claim 1, wherein when the vehicle is running in winter, the battery needs to be heated, the motor needs to be cooled, the vehicle interior needs to provide heating capacity, and the internal combustion engine is not operating, the integrated whole vehicle central thermal management system controls the heat release mode to operate in:
In this mode, the internal combustion engine (1) is shut down, the first regulating valve (121), the second regulating valve (122) and the fifth regulating valve (125) are closed, the interface between the first three-way valve (111) and the inlet of the expander (3) is closed, the interface between the fourth three-way valve (114) and the inlet of the condenser (9) is closed, the interface between the fifth three-way valve (115) and the outlet of the compressor (5) is closed, the interface between the second three-way valve (112) and the outlet of the cold side of the regenerator (4) is closed, and the interface between the third three-way valve (113) and the inlet of the cold side of the regenerator (4) is closed;
for the waste heat recovery system branch, the waste heat recovery system branch and the refrigeration branch are changed into a circulation loop at the moment, a hot side inlet of the smoke heat exchanger (2) is connected with a smoke outlet of the internal combustion engine (1), a cold side outlet of the smoke heat exchanger (2) is connected with a first interface of a first three-way valve (111), a second interface of the first three-way valve (111) is connected with an outlet of the expansion machine (3), and a third interface of the first three-way valve (111) is closed;
The outlet of the expander (3) is connected with the hot side inlet of the heat regenerator (4), the hot side outlet of the heat regenerator (4) is connected with the first interface of the fourth three-way valve (114), the second interface of the fourth three-way valve (114) is closed, the third interface of the fourth three-way valve (114) is connected with the first interface of the fifth three-way valve (115), the second interface of the fifth three-way valve (115) is respectively connected with the third regulating valve (123) and the fourth regulating valve (124), and the third interface of the fifth three-way valve (115) is closed; the outlet of the third regulating valve (123) is connected with the hot side inlet of the in-vehicle evaporator (14), the outlet of the fourth regulating valve (124) is connected with the inlet of the battery cooling evaporator (16), the hot side outlets of the in-vehicle evaporator (14) and the battery cooling evaporator (16) are respectively connected with the first expansion regulating valve (131) and the second expansion regulating valve (132), the outlets of the first expansion regulating valve (131) and the second expansion regulating valve (132) are converged, and then the outlet of the first expansion regulating valve and the outlet of the second expansion regulating valve are connected with the second interface of the sixth three-way valve (116);
The first port of the sixth three-way valve (116) is closed, and the third port of the sixth three-way valve (116) is connected with the inlet of the storage tank (10); the outlet of the storage tank (10) is connected with the inlet of the working medium pump (11), the working medium at the outlet of the working medium pump (11) is divided into two paths, one path enters the cold side inlet of the EGR heat exchanger (8), and the other path enters the cold side inlet of the charge air heat exchanger (7); the working medium at the cold side outlet of the EGR heat exchanger (8) is connected with the cold side inlet of the cylinder liner water heat exchanger (6) after being converged with the working medium at the cold side outlet of the charge air heat exchanger (7), the cold side outlet of the cylinder liner water heat exchanger (6) is connected with the first interface of the third three-way valve (113), the second interface of the third three-way valve (113) is closed, the third interface of the third three-way valve (113) is connected with the first interface of the second three-way valve (112), the second interface of the second three-way valve (112) is closed, and the third interface of the second three-way valve (112) is connected with the cold side inlet of the flue gas heat exchanger (2);
For the cooling water branch, the cooling water branch now becomes two independent circuits due to the closing of the second regulating valve (122) and the fifth regulating valve (125): the first loop is a battery heating branch, when the flowing direction of working medium in the cooling water branch is opposite to that of a cold electric mode, an outlet of a battery radiator (20) is respectively connected with a resistance heater (17) and a cold side inlet of a battery cooling evaporator (16), the cold side outlet of the battery cooling evaporator (16) is connected with a first interface of a three-way valve (117), an outlet of the resistance heater (17) is connected with a second interface of a seventh three-way valve (117), a third interface of the seventh three-way valve (117) is connected with an inlet of a battery heating branch pump (19), and an outlet of the battery heating branch pump (19) is connected with an inlet of the battery radiator (20);
The second loop is an electric appliance cooling branch, the outlet of an electric appliance cooling branch pump (18) is connected with the inlet of an electric appliance radiator (13), the outlet of the electric appliance radiator (13) is connected with the inlet of a cooler (12), and the outlet of the cooler (12) is connected with the inlet of the electric appliance cooling branch pump (18);
in the heat release mode, the waste heat branch of the internal combustion engine does not work at the moment;
For the energy supply branch in the vehicle, the working mode of the energy supply branch in the vehicle is identical to that of the thermoelectric mode; the method comprises the following steps: in-vehicle energy supply branch road working medium flow direction is opposite with cold electric mode time this moment, and the export of in-vehicle radiator (15) links to each other with the entry of circulating pump (21), and the export of circulating pump (21) links to each other with the cold side entry of in-vehicle evaporimeter (14), and in-vehicle evaporimeter (14) cold side export links to each other with the entry of in-vehicle radiator (15).
5. The integrated whole vehicle central thermal management system for a hybrid electric vehicle of claim 1, wherein when the vehicle is running in winter, the battery needs to be heated, the motor needs to dissipate heat, the vehicle needs to provide heating capacity, and the heat storage capacity in the system is insufficient, the integrated whole vehicle central thermal management system controls the heating mode to operate in:
In this mode, the internal combustion engine (1) works, the second regulating valve (122) and the fifth regulating valve (125) are closed, the interface between the first three-way valve (111) and the outlet of the expander (3) is closed, the interface between the fourth three-way valve (114) and the inlet of the condenser (9) is closed, the interface between the fifth three-way valve (115) and the outlet of the compressor (5) is closed, the interface between the second three-way valve (112) and the outlet of the cold side of the regenerator (4) is closed, and the interface between the third three-way valve (113) and the inlet of the cold side of the regenerator is closed;
for the waste heat recovery system branch, at the moment, in the waste heat recovery system branch, a hot side inlet of a flue gas heat exchanger (2) is connected with flue gas of an internal combustion engine (1), a cold side outlet of the flue gas heat exchanger (2) is connected with a first interface of a first three-way valve (111), a second interface of the first three-way valve (111) is connected with an outlet of an expander (3), and a third interface of the first three-way valve (111) is closed;
the outlet of the expander (3) is connected with the hot side inlet of the heat regenerator (4), the hot side outlet of the heat regenerator (4) is connected with the first interface of the fourth three-way valve (114), the second interface of the fourth three-way valve (114) is connected with the first regulating valve (121), and the third interface of the fourth three-way valve (114) is connected with the first interface of the fifth three-way valve (115);
The first regulating valve (121) is connected with the second port of the sixth three-way valve (116), the first port of the sixth three-way valve (116) is closed, and the third port of the sixth three-way valve (116) is connected with the inlet of the storage tank (10);
The outlet of the storage tank (10) is connected with the inlet of the working medium pump (11), the outlet working medium of the working medium pump (11) is divided into two paths, one path enters the cold side inlet of the EGR heat exchanger (8), and the other path enters the cold side inlet of the charge air heat exchanger (7);
The working medium at the cold side outlet of the EGR heat exchanger (8) is connected with the cold side inlet of the cylinder liner water heat exchanger (6) after being converged with the working medium at the cold side outlet of the charge air heat exchanger (7), the cold side outlet of the cylinder liner water heat exchanger (6) is connected with the first interface of the third three-way valve (113), the second interface of the third three-way valve (113) is closed, the third interface of the third three-way valve (113) is connected with the first interface of the second three-way valve (112), the second interface of the second three-way valve (112) is closed, and the third interface of the second three-way valve (112) is connected with the cold side inlet of the flue gas heat exchanger (2);
For the refrigerating branch, the refrigerating branch is changed into a heating branch, the flowing direction of working medium is opposite to that of a cold electric mode, and the in-vehicle evaporator (14) and the battery cooling evaporator (16) respectively play roles of an in-vehicle heater and a battery heater at the moment;
the third interface of the fourth three-way valve (114) is connected with the first interface of the fifth three-way valve (115), the second interface of the third three-way valve (115) is respectively connected with the third regulating valve (123) and the fourth regulating valve (124), and the third interface of the fifth three-way valve (115) is closed; the outlet of the third regulating valve (123) is connected with the hot side inlet of the in-vehicle evaporator (14), the outlet of the fourth regulating valve (124) is connected with the hot side inlet of the battery cooling evaporator (16), the hot side outlets of the in-vehicle evaporator (14) and the battery cooling evaporator (16) are respectively connected with the first expansion regulating valve (131) and the second expansion regulating valve (132), and the outlets of the first expansion regulating valve (131) and the second expansion regulating valve (132) are converged and then connected with the second interface of the sixth three-way valve (116);
For the cooling water branch, the cooling water branch now becomes two independent circuits due to the closing of the second regulating valve (122) and the fifth regulating valve (125): the first loop is a battery heating branch, when the flowing direction of working medium in the cooling water branch is opposite to that of a cold electric mode, an outlet of a battery radiator (20) is respectively connected with a resistance heater (17) and a cold side inlet of a battery cooling evaporator (16), the cold side outlet of the battery cooling evaporator (16) is connected with a first interface of a three-way valve (117), an outlet of the resistance heater (17) is connected with a second interface of a seventh three-way valve (117), a third interface of the seventh three-way valve (117) is connected with an inlet of a battery heating branch pump (19), and an outlet of the battery heating branch pump (19) is connected with an inlet of the battery radiator (20);
The second loop is an electric appliance cooling branch, the outlet of an electric appliance cooling branch pump (18) is connected with the inlet of an electric appliance radiator (13), the outlet of the electric appliance radiator (13) is connected with the inlet of a cooler (12), and the outlet of the cooler (12) is connected with the inlet of the electric appliance cooling branch pump (18);
for the internal combustion engine waste heat branch, the working mode of the internal combustion engine waste heat branch is identical to that of the thermoelectric mode; namely, the method is as follows: the recirculation exhaust gas EGR of the internal combustion engine (1) in the internal combustion engine waste heat branch enters the EGR heat exchanger (8) from the hot side inlet of the EGR heat exchanger (8), and returns to the internal combustion engine (1) from the hot side outlet of the EGR heat exchanger (8); the charge air of the internal combustion engine (1) enters the charge air heat exchanger (7) from a hot side inlet of the charge air heat exchanger (7) and returns to the internal combustion engine (1) from a hot side outlet of the charge air heat exchanger (7); cylinder liner water of the internal combustion engine (1) enters the cylinder liner water heat exchanger (6) from a hot side inlet of the cylinder liner water heat exchanger (6), and returns to the internal combustion engine (1) from a hot side outlet of the cylinder liner water heat exchanger (6);
For the energy supply branch in the vehicle, the working mode in the energy supply branch in the vehicle is identical to that in the thermoelectric mode; the method comprises the following steps: in-vehicle energy supply branch road working medium flow direction is opposite with cold electric mode time this moment, and the export of in-vehicle radiator (15) links to each other with the entry of circulating pump (21), and the export of circulating pump (21) links to each other with the cold side entry of in-vehicle evaporimeter (14), and in-vehicle evaporimeter (14) cold side export links to each other with the entry of in-vehicle radiator (15).
CN202210629170.0A 2022-06-06 2022-06-06 Integrated whole vehicle central thermal management system for hybrid electric vehicle Active CN115195392B (en)

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