Integrated thermal management system of hybrid power engineering machinery and vehicle

Abstract

The utility model belongs to the field of thermal management systems, and provides an integrated thermal management system of hybrid power engineering machinery and a vehicle, which comprises a heat pump air-conditioning subsystem, a range extender thermal management subsystem, a battery thermal management subsystem and a transmission device composite thermal management subsystem which are mutually coupled, according to the utility model, the working performance and the use safety of the battery and the motor are protected from the aspect of thermal characteristics while the refrigeration / heating requirements of the environment in the cockpit are met, so that the temperature is maintained in a normal working interval; meanwhile, mutual transfer of waste heat among all parts can be achieved, energy is saved, and the continuous working time of the whole machine is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of thermal management systems, and in particular relates to an integrated thermal management system for hybrid power engineering machinery and a vehicle. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] The working conditions of construction machinery are complex, and the output energy varies greatly over time. Hybrid construction machinery uses a low-power engine, which can work in the engine economic range for a long time after forming a dual power source with a battery, saving fuel consumption, maintenance costs and pollutant emissions, and is the mainstream direction of the industry.

[0004] There are thermal management requirements for many important components of hybrid engineering machinery, such as motors and their electronic control units, power batteries, cockpits, range extenders, diesel engines, hydraulic systems, etc. Most thermal management systems are complex and redundant, and are independent of each other in structure. Each component performs cooling and heating separately, resulting in a large number of parts in the whole machine, high energy consumption and low energy utilization.

[0005] The waste heat recovery mode can transfer waste heat from high-temperature components such as the engine to low-temperature components, thereby improving the energy utilization rate of the system. However, at present, the thermal management systems of most hybrid engineering machinery can only recover waste heat from the engine, and lack waste heat recovery from batteries, motors, cockpits and hydraulic oils; when the whole machine is running purely on electricity, the engine is turned off, and the system can only use PTC to heat the cockpit; after the vehicle is turned off, the waste heat in the cockpit is also wasted and cannot be used to maintain the temperature of the power battery. The above situations have caused a lot of energy waste. Summary of the invention

[0006] In order to solve the above-mentioned problems, the present invention proposes an integrated thermal management system and a vehicle for hybrid engineering machinery. While meeting the cooling / heating requirements for the environment in the cockpit, the present invention protects the working performance and safety of the battery and the motor from the aspect of thermal characteristics, so that their temperature is maintained within the normal working range; at the same time, it can realize the mutual transfer of waste heat between components, save energy, and extend the continuous working time of the whole machine.

[0007] According to some embodiments, the utility model adopts the following technical solutions:

[0008] An integrated thermal management system for hybrid engineering machinery includes a heat pump air conditioning subsystem, a range extender thermal management subsystem, a battery thermal management subsystem and a transmission device composite thermal management subsystem, wherein:

[0009] The heat pump air conditioning subsystem includes a compressor, a first four-way valve, an in-vehicle heat exchanger, an out-vehicle heat exchanger and a first three-way valve, wherein the first four-way valve connects the compressor and the out-vehicle heat exchanger, and is connected to the in-vehicle heat exchanger through the first three-way valve;

[0010] The range extender thermal management subsystem includes an engine, a range extender generator, a motor controller, a second composite heat exchanger, and a second electronic three-way valve. The range extender generator and the motor controller form a series branch and are connected in parallel with the engine. The engine and the series branch are connected through the second electronic three-way valve and the second composite heat exchanger.

[0011] The battery thermal management subsystem includes a battery direct cooling and direct heating plate, a solenoid valve, a second electronic expansion valve and a fourth three-way valve. One end of the battery direct cooling and direct heating plate is connected to the second four-way valve through the third three-way valve, and the other end is connected to the fourth three-way valve and the second composite heat exchanger through the solenoid valve, the second electronic expansion valve, the fourth three-way valve and the second composite heat exchanger. The battery thermal management subsystem is connected to the heat pump air conditioning subsystem, and the cooling medium circulates between the heat pump air conditioning subsystem and the battery thermal management subsystem;

[0012] The transmission device composite thermal management subsystem includes a coolant pump, a second four-way valve, a temperature sensor, an electronic expansion valve and a first composite heat exchanger. The coolant pump is connected to the second end of the second four-way valve and the temperature sensor respectively. The other side of the temperature sensor is connected to the first composite heat exchanger through a valve. The first composite heat exchanger is connected to the second composite heat exchanger through the electronic expansion valve.

[0013] As an optional embodiment, the first four-way valve of the heat pump air-conditioning subsystem is respectively connected to the compressor, the first end of the outdoor heat exchanger, and the first end of the first three-way valve, the second end of the first three-way valve is connected to the first end of the indoor heat exchanger, and the third end of the first three-way valve is connected to the first end of the second four-way valve; the indoor heat exchanger is connected to the second end of the second three-way valve through the first solenoid valve and the first electronic expansion valve, and the first end of the second three-way valve is connected to the outdoor heat exchanger.

[0014] As an optional implementation, the off-vehicle heat exchanger is equipped with an off-vehicle cooling fan, and the on-vehicle heat exchanger is equipped with a blower and a PTC heater.

[0015] As an optional implementation, the engine, the fourth solenoid valve, and the gearbox of the range extender thermal management subsystem are connected in series to the same circuit;

[0016] The range extender generator is connected to the second composite heat exchanger via a thirteenth-way valve and a second water pump.

[0017] As an optional embodiment, the second composite heat exchanger is connected to the third end of the fourth three-way valve, the first end of the fourth three-way valve is connected to the third end of the second three-way valve, the second end of the fourth three-way valve is connected to the second electronic expansion valve, and the second electronic expansion valve is connected to the battery direct cooling and heating plate through the second solenoid valve.

[0018] As an optional embodiment, the battery direct cooling and direct heating plate is connected to the fourth end of the second four-way valve through the first end of the third three-way valve, connected to the one-way valve through the second end of the third three-way valve, and connected to the first compound heat exchanger through the one-way valve and the sixth three-way valve.

[0019] As an optional implementation, the temperature sensor is connected to the third end of the second four-way valve and the sixth three-way valve via a fifth three-way valve.

[0020] As an optional embodiment, the first compound heat exchanger is connected to a second external heat exchanger, the second external heat exchanger is equipped with an external cooling fan, the first compound heat exchanger is also connected to the travel motor through the seventh three-way valve, the travel motor and the corresponding motor controller and the third solenoid valve are connected in series, the first compound heat exchanger is also connected to the ninth three-way valve through the seventh three-way valve, connected to the working motor through the second end of the ninth three-way valve, and connected to the hydraulic system through the first end of the ninth three-way valve.

[0021] As an optional implementation, the hydraulic system and the working motor are connected through the first electronic three-way valve and the second end of the eighth three-way valve, the first end of the eighth three-way valve is connected to the first water pump, the first water pump is connected to the first compound heat exchanger, and the third end of the eighth three-way valve is connected to the third solenoid valve.

[0022] As an optional embodiment, the first compound heat exchanger is connected to the second compound heat exchanger via a third expansion valve.

[0023] A vehicle comprises the above-mentioned integrated thermal management system for a hybrid power engineering machine.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] 1. By interconnecting the four subsystems, the energy of each component can be transferred to each other, which saves energy and extends the continuous working time of the whole machine; at the same time, the number of parts is reduced, the space in the vehicle is saved, and the cost is reduced.

[0026] 2. Through the coupling of the heat pump air conditioning subsystem, the battery thermal management subsystem, and the transmission device composite thermal management subsystem, the battery can still use the heat in the car to keep warm after the entire machine is shut down in pure electric mode, which is conducive to quick starting.

[0027] 3. Through the integration of generator thermal management and engine thermal management, the heat dissipation of the generator and the waste heat recovery of the engine will not interfere with each other, the system will be more compact and the length of the pipe will be reduced.

[0028] 4. Through the parallel connection between the components in the transmission thermal management system, forced air cooling can be used alone during normal cooling, and air conditioning can be turned on when necessary, thereby achieving precise temperature control and saving energy.

[0029] 5. By isolating the cooling medium of each circuit, impurities in other circuits are prevented from entering the main circuit, causing blockage of the main circuit, resulting in untimely heat transfer and safety problems.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0032] Figure 1 The present invention is a structural diagram of an integrated thermal management system for hybrid power engineering machinery according to an embodiment. DETAILED DESCRIPTION

[0033] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0034] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] In the absence of conflict, the embodiments in this application and the features in the embodiments may be combined with each other.

[0037] Embodiment 1

[0038] An integrated thermal management system for hybrid engineering machinery is designed to meet the cooling / heating requirements of the cockpit environment while protecting the working performance and safety of the battery and motor from the thermal characteristics, so that their temperature is maintained within the normal working range. At the same time, it can realize the mutual transfer of waste heat between components, save energy, and extend the continuous working time of the whole machine.

[0039] This system consists of four subsystems: heat pump air conditioning subsystem, range extender thermal management subsystem, battery thermal management subsystem, and transmission composite thermal management subsystem.

[0040] Among them, the integrated thermal management system can be divided into three loops according to the different cooling media, including:

[0041] The integrated thermal management main circuit where the heat pump air conditioning subsystem and the battery thermal management subsystem are located uses coolant as the cooling medium;

[0042] The range extender circuit where the range extender thermal management subsystem is located uses engine cooling water as the cooling medium;

[0043] The secondary circuit where the transmission device composite thermal management subsystem is located uses cooling water as the cooling medium.

[0044] The heat pump air conditioning subsystem is used for heating or cooling the passenger compartment, and can also utilize the waste heat of the passenger compartment to keep the battery warm; the range extender thermal management subsystem recovers the waste heat of the engine, and can also cool the generator and its motor controller, while the gearbox dissipates heat with the help of the engine's internal cooling system; the battery thermal management subsystem heats or cools the battery through the battery direct cooling and direct heating plate, and can also heat the passenger compartment with the waste heat of the battery; the composite heat exchanger (or cooler, hereinafter referred to as Chiller) 1 in the transmission composite thermal management subsystem can realize heat exchange between the main circuit coolant and the cooling water in the secondary circuit, dissipate heat for the hydraulic system and the working motor, the travel motor and their respective motor controllers, and can also recover the waste heat in the hydraulic system, the motor and the controller for heating the passenger compartment and the battery.

[0045] The connection structure and circulation loop of each subsystem are described in detail below with reference to the accompanying drawings.

[0046] like Figure 1 As shown, in the heat pump air conditioning subsystem, the compressor is connected to the four-way valve 1; the four-way valve 1 is respectively connected to the compressor, the first end of the outdoor heat exchanger 1, and the first end of the three-way valve 1; the second end of the three-way valve 1 is connected to the first end of the indoor heat exchanger, and the third end of the three-way valve 1 is connected to the first end of the four-way valve 2; the indoor heat exchanger is connected to the second end of the three-way valve 2 through the solenoid valve 1 and the electronic expansion valve 1, and the first end of the three-way valve 2 is connected to the outdoor heat exchanger; the outdoor heat exchanger is equipped with an outdoor cooling fan 1, and the indoor heat exchanger is equipped with a blower and a PTC heater.

[0047] The components of the main circuit are connected to form the following thermal cycle system:

[0048] Passenger compartment refrigeration cycle: in-vehicle heat exchanger-three-way valve 1-four-way valve 1-compressor-four-way valve 1-out-vehicle heat exchanger 1-three-way valve 2-electronic expansion valve 1-solenoid valve 1-in-vehicle heat exchanger. The out-vehicle cooling fan 1, solenoid valve 1 and compressor are turned on, the four-way valve 1 is in the third position, the first end of the four-way valve 2 is connected to the fourth end, and the second end is connected to the third end.

[0049] There are four cycles when the heat pump air conditioning subsystem is used to heat the passenger compartment: pure electric cycle, extended range cycle, battery waste heat recovery cycle, and transmission waste heat recovery cycle. When the cabin temperature is lower than the first set value, the PTC heater is turned on.

[0050] Pure electric cycle: in-vehicle heat exchanger - solenoid valve 1 - electronic expansion valve 1 - three-way valve 2 - out-vehicle heat exchanger 1 - four-way valve 1 - compressor - four-way valve 1 - three-way valve 1 - in-vehicle heat exchanger. The out-vehicle cooling fan 1, solenoid valve 1 and compressor are turned on, four-way valve 1 is in the first position, the first end of four-way valve 2 is connected to the fourth end, and the second end is connected to the third end.

[0051] Range extension cycle / transmission device waste heat recovery cycle: in-vehicle heat exchanger-three-way valve 1-four-way valve 2-coolant pump-temperature sensor-three-way valve 5-three-way valve 6-Chiller 1-electronic expansion valve 3-Chiller 2-three-way valve 4-three-way valve 2-electronic expansion valve 1-solenoid valve 1-in-vehicle heat exchanger. Solenoid valve 1 and coolant pump are opened, four-way valve 1 is in the second position, and the first end of four-way valve 2 is connected to the second end, and the third end is connected to the fourth end.

[0052] Battery waste heat recovery cycle: in-vehicle heat exchanger-three-way valve 1-four-way valve 2-coolant pump-temperature sensor-three-way valve 5-four-way valve 2-three-way valve 3-battery direct cooling and direct heating plate-solenoid valve 2-electronic expansion valve 2-three-way valve 4-three-way valve 2-electronic expansion valve 1-solenoid valve 1-in-vehicle heat exchanger. Solenoid valve 1, solenoid valve 2 and coolant pump are turned on, four-way valve 1 is in the second position, the first end of four-way valve 2 is connected to the second end, and the third end is connected to the fourth end.

[0053] The above four cycles can be coupled with each other, and the components are turned on as follows:

[0054] Pure electric cycle coupled with extended range cycle / battery waste heat recovery cycle / transmission waste heat recovery cycle: the exterior cooling fan 1 is turned off, the four-way valve 1 is adjusted to the third position, the first end of the four-way valve 2 is connected to the second end, and the third end is connected to the fourth end, and the other components of the original cycle remain unchanged;

[0055] When the range-extending cycle, the battery waste heat recovery cycle, and the transmission waste heat recovery cycle are coupled with each other, the opening status of the main circuit components does not need to be changed.

[0056] Range Extender Thermal Management Subsystem

[0057] The engine itself has a complete thermal management system in the range extender's thermal management subsystem, which can cool itself and dissipate sufficient heat to other systems.

[0058] In the range extender thermal management subsystem, the engine is connected in parallel with the range extender generator and the motor controller 3. One end of the two is connected to Chiller 2 via the electronic three-way valve 2, and the other end is connected to Chiller 2 via the three-way valve 10 and the water pump 2. The engine, the solenoid valve 4, and the gearbox are connected in series to the same circuit.

[0059] The components of the range extender circuit are connected to form the following thermal cycle system:

[0060] Generator refrigeration cycle: range extender generator-motor controller 3-electronic three-way valve 2-Chiller 2-water pump 2-three-way valve 10-range extender generator.

[0061] At this time, the main circuit circulation is: Chiller2-electronic expansion valve 3-Chiller1-three-way valve 6-check valve-three-way valve 3-four-way valve 2-three-way valve 1-four-way valve 1-compressor-four-way valve 1-outboard heat exchanger 1-three-way valve 2-three-way valve 4-Chiller2. Outboard cooling fan 1, outboard cooling fan 3, compressor and water pump 2 are turned on, four-way valve 1 is in the third position, the first end of four-way valve 2 is connected to the fourth end, the second end is connected to the third end, and the first end of electronic three-way valve 2 is connected to the second end.

[0062] The utility model uses the cooling system of the engine to dissipate heat for the gearbox, the medium is the cooled engine cooling water, which is driven by a cooling water pump inside the engine and is independent of other thermal management systems.

[0063] Transmission refrigeration cycle: transmission-engine-solenoid valve 4-transmission. Solenoid valve 4 and the engine internal cooling water pump are turned on.

[0064] In the range-extending mode of the heat pump air conditioning subsystem and the battery thermal management subsystem, the engine cooling water circulation in the range-extending circuit is: Chiller2-water pump 2-three-way valve 10-engine-electronic three-way valve 2-Chiller2. Water pump 2 is turned on, and the first and third ends of the electronic three-way valve 2 are connected.

[0065] Battery Thermal Management Subsystem

[0066] In the battery thermal management subsystem, one end of the battery direct cooling and heating plate is connected to the three-way valve 4 through the solenoid valve 2 and the electronic expansion valve 2, and the other end is connected to the four-way valve 2 through the three-way valve 3. The battery thermal management subsystem can be connected to the heat pump air conditioning subsystem, and the cooling medium can circulate between the heat pump air conditioning subsystem and the battery thermal management subsystem. The battery direct cooling and heating plate directly uses coolant to transfer heat, which can directly cool and heat the power battery efficiently and quickly. The battery direct cooling and heating plate is installed inside the power battery pack and is controlled by the BMS inside the power battery to heat or cool the power battery pack.

[0067] The components of the main circuit are connected to form the following thermal cycle system:

[0068] Battery refrigeration cycle: battery direct cooling and heating plate - three-way valve 3 - four-way valve 2 - three-way valve 1 - four-way valve 1 - compressor - four-way valve 1 - external heat exchanger 1 - three-way valve 2 - three-way valve 4 - electronic expansion valve 2 - solenoid valve 2 - battery direct cooling and heating plate. External cooling fan 1, solenoid valve 2 and compressor are turned on, four-way valve 1 is in the third position, four-way valve 2 has its first end connected to its fourth end, and its second end connected to its third end.

[0069] There are four cycles when the battery thermal management subsystem is used for battery heating: pure electric cycle, range-extended cycle, transmission waste heat recovery cycle, and thermal insulation cycle. Among them, the range-extended cycle, transmission waste heat recovery cycle, and thermal insulation cycle can all be used to keep the battery warm after the entire machine is shut down.

[0070] Pure electric cycle: battery direct cooling and heating plate - solenoid valve 2 - electronic expansion valve 2 - three-way valve 4 - three-way valve 2 - external heat exchanger 1 - four-way valve 1 - compressor - four-way valve 1 - three-way valve 1 - four-way valve 2 - three-way valve 3 - battery direct cooling and heating plate. External cooling fan 1, solenoid valve 2 and compressor are turned on, four-way valve 1 is in the second position, four-way valve 2 has its first end connected to its fourth end, and its second end connected to its third end.

[0071] Range extension cycle / transmission device waste heat recovery cycle: battery direct cooling and direct heating plate-three-way valve 3-four-way valve 2-coolant pump-temperature sensor-three-way valve 5-three-way valve 6-Chiller 1-electronic expansion valve 3-Chiller 2-three-way valve 4-electronic expansion valve 2-solenoid valve 2-battery direct cooling and direct heating plate. Solenoid valve 2 and coolant pump are opened, four-way valve 1 is in the second position, and the second end of four-way valve 2 is connected to the fourth end.

[0072] Insulation cycle: battery direct cooling and heating plate - solenoid valve 2 - electronic expansion valve 2 - three-way valve 4 - three-way valve 2 - electronic expansion valve 1 - solenoid valve 1 - in-vehicle heat exchanger - three-way valve 1 - four-way valve 2 - coolant pump - temperature sensor - three-way valve 5 - four-way valve 2 - three-way valve 3 - battery direct cooling and heating plate. Solenoid valve 1, solenoid valve 2 and coolant pump are turned on, four-way valve 1 is in the second position, four-way valve 2 has its first end connected to its second end, and its third end connected to its fourth end. This cycle can only be used after the entire machine is turned off.

[0073] Among the above four cycles, the pure electric cycle and the heat preservation cycle cannot be coupled with each other, but the other modes can be coupled. When coupled, the components are turned on as follows:

[0074] Pure electric cycle coupled with range extension cycle / transmission waste heat recovery cycle: the vehicle exterior cooling fan 1 is turned off, the four-way valve 1 is adjusted to the third position, the first end of the four-way valve 2 is connected to the second end, and the third end is connected to the fourth end, and the other components of the original cycle remain unchanged;

[0075] Insulation cycle coupled with range-extending cycle / transmission device waste heat recovery cycle: the first end of four-way valve 2 is connected to the second end, the third end is connected to the fourth end, and the other parts of the original cycle remain unchanged;

[0076] When the range-extending cycle and the transmission waste heat recovery cycle are coupled with each other, the opening conditions of the main circuit components do not need to be changed.

[0077] Transmission composite thermal management subsystem

[0078] The main circuit coolant pump of the transmission device composite thermal management subsystem is respectively connected to the second end of the four-way valve 2 and the temperature sensor; the temperature sensor is connected to the three-way valve 5; the one-way valve is respectively connected to the three-way valve 3 and the three-way valve 6; Chiller 1 is respectively connected to the three-way valve 6 and the electronic expansion valve 3; the electronic expansion valve 3 is connected to Chiller 2.

[0079] The secondary circuit working motor and motor controller 1 of the transmission composite thermal management subsystem are connected to the electronic three-way valve 1 and the three-way valve 9; the hydraulic system is connected to the electronic three-way valve 1 and the three-way valve 9; the travel motor and motor controller 2 are connected to the three-way valve 7 and connected to the three-way valve 8 via the solenoid valve 3; the external heat exchanger 2 is connected to the three-way valve 7 and Chiller 1, and is equipped with an external cooling fan 2; Chiller 1 is connected to the external heat exchanger 2 and the water pump 1; the water pump 1 is connected to the three-way valve 8.

[0080] The working motor and hydraulic system are adjacent to each other and have the same thermal management requirements, so they are placed in the same branch. The secondary circuit dissipates heat through the external heat exchanger 2 under the action of the external cooling fan 2, and can also dissipate heat to the main circuit through Chiller 1. In general, the hydraulic system, motor and motor controller only have cooling requirements.

[0081] The components of the secondary circuit are connected to form the following thermal cycle system:

[0082] Working motor cooling / waste heat recovery cycle: working motor-three-way valve 9-three-way valve 7-outboard heat exchanger 2-Chiller 1-water pump 1-three-way valve 8-electronic three-way valve 1-motor controller 1-working motor. The outboard cooling fan 2 and water pump 1 are turned on, and the first end of the electronic three-way valve 1 is connected to the second end.

[0083] Hydraulic system refrigeration / waste heat recovery cycle: hydraulic system-three-way valve 9-three-way valve 7-external heat exchanger 2-Chiller 1-water pump 1-three-way valve 8-electronic three-way valve 1-hydraulic system. The external cooling fan 2 and water pump 1 are turned on, and the first and third ends of the electronic three-way valve 1 are connected.

[0084] Traveling motor cooling / waste heat recovery cycle: Traveling motor-three-way valve 7-external heat exchanger 2-Chiller 1-water pump 1-three-way valve 8-solenoid valve 3-motor controller 2-traveling motor. The external cooling fan 2, water pump 1, and solenoid valve 3 are turned on.

[0085] The above three cycles can be coupled with each other. When the main circuit is the transmission device waste heat recovery cycle, the three cycles are coupled with the main circuit through Chiller1.

[0086] When the generator or transmission device is in a refrigeration cycle, the main circuit cycle is: Chiller2-electronic expansion valve 3-Chiller1-three-way valve 6-check valve-three-way valve 3-four-way valve 2-three-way valve 1-four-way valve 1-compressor-four-way valve 1-outboard heat exchanger 1-three-way valve 2-three-way valve 4-Chiller2. The outboard cooling fan 1, outboard cooling fan 3, compressor and water pump 2 are turned on, four-way valve 1 is in the third position, the first end of four-way valve 2 is connected to the fourth end, the second end is connected to the third end, and the first end of electronic three-way valve 2 is connected to the second end. This cycle can be coupled with the cockpit / battery refrigeration cycle.

[0087] The above description is only the preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the utility model without creative labor shall be included in the protection scope of the utility model.

Claims

1. An integrated thermal management system for a hybrid engineering machine, characterized in that: It includes heat pump air conditioning subsystem, range extender thermal management subsystem, battery thermal management subsystem and transmission composite thermal management subsystem, among which: The heat pump air conditioning subsystem includes a compressor, a first four-way valve, an in-vehicle heat exchanger, an out-vehicle heat exchanger and a first three-way valve, wherein the first four-way valve connects the compressor and the out-vehicle heat exchanger, and is connected to the in-vehicle heat exchanger through the first three-way valve; The range extender thermal management subsystem includes an engine, a range extender generator, a motor controller, a second composite heat exchanger, and a second electronic three-way valve. The range extender generator and the motor controller form a series branch and are connected in parallel with the engine. The engine and the series branch are connected through the second electronic three-way valve and the second composite heat exchanger. The battery thermal management subsystem includes a battery direct cooling and direct heating plate, a solenoid valve, a second electronic expansion valve and a fourth three-way valve. One end of the battery direct cooling and direct heating plate is connected to the second four-way valve through the third three-way valve, and the other end is connected to the fourth three-way valve and the second composite heat exchanger through the solenoid valve, the second electronic expansion valve, and the second composite heat exchanger. The battery thermal management subsystem is connected to the heat pump air conditioning subsystem, and the cooling medium circulates between the heat pump air conditioning subsystem and the battery thermal management subsystem; The transmission device composite thermal management subsystem includes a coolant pump, a second four-way valve, a temperature sensor, an electronic expansion valve and a first composite heat exchanger. The coolant pump is connected to the second end of the second four-way valve and the temperature sensor respectively. The other side of the temperature sensor is connected to the first composite heat exchanger through a valve. The first composite heat exchanger is connected to the second composite heat exchanger through the electronic expansion valve.

2. An integrated thermal management system for hybrid engineering machinery as claimed in claim 1, characterized in that: The first four-way valve of the heat pump air-conditioning subsystem is respectively connected to the compressor, the first end of the outdoor heat exchanger, and the first end of the first three-way valve; the second end of the first three-way valve is connected to the first end of the indoor heat exchanger, and the third end of the first three-way valve is connected to the first end of the second four-way valve; the indoor heat exchanger is connected to the second end of the second three-way valve through the first solenoid valve and the first electronic expansion valve, and the first end of the second three-way valve is connected to the outdoor heat exchanger.

3. An integrated thermal management system for hybrid engineering machinery as claimed in claim 1 or 2, characterized in that: The external heat exchanger is equipped with an external cooling fan, and the internal heat exchanger is equipped with a blower and a PTC heater.

4. The integrated thermal management system for hybrid engineering machinery according to claim 1, characterized in that: The engine, the fourth solenoid valve and the gearbox of the range extender thermal management subsystem are connected in series to the same circuit; The range extender generator is connected to the second composite heat exchanger via a thirteenth-way valve and a second water pump.

5. The integrated thermal management system for hybrid engineering machinery according to claim 1, characterized in that: The second composite heat exchanger is connected to the third end of the fourth three-way valve, the first end of the fourth three-way valve is connected to the third end of the second three-way valve, the second end of the fourth three-way valve is connected to the second electronic expansion valve, and the second electronic expansion valve is connected to the battery direct cooling and heating plate through the second solenoid valve.

6. An integrated thermal management system for hybrid engineering machinery as claimed in claim 1 or 5, characterized in that: The battery direct cooling and direct heating plate is connected to the fourth end of the second four-way valve through the first end of the third three-way valve, connected to the one-way valve through the second end of the third three-way valve, and connected to the first composite heat exchanger through the one-way valve and the sixth three-way valve.

7. The integrated thermal management system for hybrid engineering machinery according to claim 1, characterized in that: The temperature sensor is connected to the third end of the second four-way valve and the sixth three-way valve through the fifth three-way valve.

8. The integrated thermal management system for hybrid engineering machinery according to claim 1, characterized in that: The first composite heat exchanger is connected to a second off-vehicle heat exchanger, and the second off-vehicle heat exchanger is provided with an off-vehicle cooling fan. The first composite heat exchanger is also connected to a traveling motor through a seventh three-way valve, and the traveling motor and a corresponding motor controller and a third solenoid valve are connected in series. The first composite heat exchanger is also connected to a ninth three-way valve through the seventh three-way valve, connected to a working motor through the second end of the ninth three-way valve, and connected to a hydraulic system through the first end of the ninth three-way valve.

9. An integrated thermal management system for hybrid engineering machinery as claimed in claim 8, characterized in that: The hydraulic system and the working motor are connected through the first electronic three-way valve and the second end of the eighth three-way valve, the first end of the eighth three-way valve is connected to the first water pump, the first water pump is connected to the first composite heat exchanger, and the third end of the eighth three-way valve is connected to the third solenoid valve; The first compound heat exchanger is connected to the second compound heat exchanger via a third expansion valve.

10. A vehicle, characterized in that: An integrated thermal management system for a hybrid engineering machinery comprising any one of claims 1-9.

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