Engine assembly, engine heat recovery system and vehicle

Abstract

The present application relates to engine assembly, engine heat recycling system and vehicle. The engine assembly comprises an engine and an energy accumulator; the energy accumulator comprises a shell, a cavity space is arranged in the shell, the cavity space is used for accommodating energy storage medium; the shell is provided with a first input port, a first output port, a second input port and a second output port; the cavity space is provided with a first pipeline and a second pipeline, the first pipeline is connected between the first input port and the second output port, the second pipeline is connected between the second input port and the second output port; the first input port is connected with the coolant outlet of the engine, the first output port is connected with the coolant inlet of the engine; the second input port is used for being connected with the low-temperature medium end of the heat utilization system, and the second output port is used for being connected with the high-temperature medium end of the heat utilization system. The heat generated by the engine is stored in the energy accumulator, and the heat can be stably outputted outward, so that the problem that the heat supply of the heat utilization system is unstable and the temperature is cold and hot alternately can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicles, in particular to an engine assembly, an engine heat recycling system and a vehicle. BACKGROUND

[0002] Compared with pure electric vehicles and plug-in hybrid vehicles, range extended vehicles have unique advantages. Specifically, the cruising range of range extended vehicles is not limited by the power battery capacity, and a larger cruising range can be achieved. Moreover, through refueling, the range extended vehicle can continue to travel a long distance relying on electric drive. In the range extended vehicle, the engine is used as a range extender, which is used for power generation rather than direct driving of the vehicle. In this case, the engine can always operate in a high-efficiency speed range, achieving good fuel economy.

[0003] However, on the other hand, whether the engine of the range extended vehicle works depends on the power battery capacity and working conditions of the range extended vehicle; that is, the engine of the range extended vehicle is not continuously working in many cases, but is intermittently working; for example, when the power battery capacity of the range extended vehicle is full or high, the engine will stop working.

[0004] The above working mode causes the heat generation and waste heat output of the engine of the range extended vehicle to be unstable, as shown in the following table. Figure 1 Therefore, for the range extended vehicle, it is difficult to utilize the heat generated by the engine when working to heat the passenger compartment or to heat the power battery, and the experience of the driver and passenger is poor and the heat preservation effect of the power battery is poor.

[0005] The engine applied to other vehicles also does not always generate constant heat when running, and similarly has the above-mentioned problems. SUMMARY

[0006] One of the purposes of the present application is to provide an engine assembly to solve the problem of difficulty, poor experience and poor effect of utilizing the heat generated by the engine of the range extended vehicle when working in the prior art. The second purpose of the present application is to provide two different engine heat recycling systems comprising the above-mentioned engine assembly. The third purpose of the present application is to provide a vehicle comprising the above-mentioned engine assembly or engine heat recycling system.

[0007] In order to achieve the above-mentioned purposes, the technical solutions adopted by the present application are as follows:

[0008] An engine assembly comprises an engine and an energy storage device; the energy storage device comprises a housing, a cavity space is arranged in the housing, and the cavity space is used for accommodating an energy storage medium; the housing is provided with a first input port, a first output port, a second input port and a second output port; the cavity space is provided with a first pipeline and a second pipeline, the first pipeline is connected between the first input port and the second output port, and the second pipeline is connected between the second input port and the second output port; the first input port is connected with a cooling liquid outlet of the engine, the first output port is connected with a cooling liquid inlet of the engine; the second input port is used for being connected with a low-temperature medium end of a heat utilization system, and the second output port is used for being connected with a high-temperature medium end of the heat utilization system.

[0009] In the above technical solution, the cooling liquid outlet of the engine is connected with the first input port of the energy storage device, the cooling liquid inlet of the engine is connected with the first output port of the energy storage device, the first pipeline connects the first input port and the second output port in the cavity space inside the energy storage device, according to the above connection structure, the heat generated by the engine during operation can be transferred and stored in the energy storage medium in the cavity space; and the heat stored in the energy storage medium in the cavity space has stability and can stably output heat. In this case, when the heat stored in the energy storage device is transferred to the heat utilization system for utilization, since the heat stored in the energy storage device is stable, it can be stably output to the heat utilization system, so that better heating effect and experience can be brought, and for the heat utilization system, the temperature inside can be kept stable, avoiding the situation that the temperature is high and low.

[0010] Further, the housing comprises a wall body and a heat insulation layer, and the heat insulation layer is arranged on the inner side of the wall body.

[0011] In the above technical solution, the heat insulation layer arranged in the wall body can play a heat preservation role, avoiding the rapid loss of the heat stored in the energy storage medium in the cavity space, thereby increasing the stability of the heat stored in the energy storage device, and helping to better realize the stable output of heat to the heat utilization system.

[0012] Further, the wall body is made of metal material, and / or the thickness of the wall body ranges from 1 to 2 mm.

[0013] In the above technical solution, the housing with the above structure can have sufficient structural strength and reliability.

[0014] Further, the energy storage medium is a phase change material.

[0015] In the above technical solution, the heat can be absorbed or released through phase change, and the efficiency of absorbing and releasing heat realized will be higher.

[0016] The engine heat recycling system provided by the application comprises the engine assembly and further comprises a third pipeline, a fourth pipeline, a heater core and a pumping mechanism; the third pipeline is connected between the second output port of the energy accumulator in the engine assembly and the heater core, the fourth pipeline is connected between the second input port of the energy accumulator in the engine assembly and the heater core, so as to form a closed loop circulation between the second pipeline and the heater core; the closed loop circulation between the second pipeline and the heater core is provided with refrigerant, and the pumping mechanism is used for driving the refrigerant to flow in the closed loop circulation.

[0017] In the above technical solution, when the heat stored in the energy accumulator is sufficient, stable heat output can be realized to the heater core.

[0018] Further, the third pipeline is provided with an electric heater.

[0019] In the above technical solution, when the heat stored in the energy accumulator is insufficient, the electric heater can be used to heat the refrigerant, so as to output heat to the heater core.

[0020] Further, the engine heat recycling system further comprises an electric heater and a three-way valve; the three-way valve has a first input end, a second input end and an output end; the first input end and the output end of the three-way valve are connected on the third pipeline; the electric heater has an input port and an output port, the output port is connected with the second input end of the three-way valve, and the input port is connected with the fourth pipeline.

[0021] In the above technical solution, the energy accumulator and the heater core can be selectively communicated or the electric heater and the heater core can be selectively communicated through the three-way valve.

[0022] The engine heat recycling system provided by the application comprises the engine assembly and further comprises a fifth pipeline, a sixth pipeline, a power battery unit and a pumping mechanism; the fifth pipeline is connected between the second output port of the energy accumulator in the engine assembly and the power battery unit, the sixth pipeline is connected between the second input port of the energy accumulator in the engine assembly and the power battery unit, so as to form a closed loop circulation between the second pipeline and the power battery unit; the closed loop circulation between the second pipeline and the power battery unit is provided with refrigerant, and the pumping mechanism is used for driving the refrigerant to flow in the closed loop circulation.

[0023] In the above technical solution, when the heat stored in the energy accumulator is sufficient, stable heat output can be realized to the power battery unit.

[0024] Further, the fifth pipeline is provided with a temperature sensor.

[0025] In the technical solution, the temperature of the refrigerant input to the power battery unit can be detected in real time.

[0026] Further, the engine heat recycling system further comprises an electric heater and a three-way valve; the three-way valve has a first input end, a second input end and an output end; the first input end and the output end of the three-way valve are connected on the fifth pipeline; the electric heater has an input port and an output port, the output port is connected with the second input end of the three-way valve, and the input port is connected with the sixth pipeline.

[0027] In the technical solution, the energy accumulator can be selectively communicated with the power battery unit or the electric heater is selectively communicated with the power battery unit through the three-way valve.

[0028] The vehicle provided by the application comprises the engine assembly and / or the engine heat recycling system.

[0029] Further, the vehicle is a range-extending vehicle.

[0030] The application has the following beneficial effects:

[0031] The engine assembly, the engine heat recycling system and the vehicle provided by the application have the following beneficial effects: the cooling liquid outlet of the engine is connected with the first input port of the energy accumulator, the cooling liquid inlet of the engine is connected with the first output port of the energy accumulator, and the first pipeline connects the first input port and the second output port in the cavity space inside the energy accumulator; according to the connection structure, the heat generated by the engine during operation can be transferred and stored in the energy storage medium in the cavity space; and the heat stored in the energy storage medium in the cavity space has stability and can stably output heat. In this case, when the heat stored in the energy accumulator is transferred to the heat utilization system for utilization, the stored heat in the energy accumulator can be stably output to the heat utilization system, which can bring better heating effect and experience, and the heat utilization system can maintain the stability of the temperature and avoid the situation of high and low temperature. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a schematic diagram of the heat output from the engine in the prior art;

[0033] Figure 2 It is a schematic diagram of the frame structure of the engine assembly in the embodiment of the application;

[0034] Figure 3 It is a schematic diagram of the frame structure of the engine assembly in the embodiment of the application; Figure 2 It is a schematic diagram of the frame structure of the engine assembly in the embodiment of the application;

[0035] Figure 4 It is a schematic diagram of the frame structure of the engine assembly in the embodiment of the application;Figure 2 Cross-sectional view of the energy accumulator in the engine assembly shown;

[0036] Figure 5 Schematic diagram of the engine heat recycling system in one embodiment of the present application;

[0037] Figure 6 Schematic diagram of the engine heat recycling system in another embodiment of the present application;

[0038] Figure 7 Schematic diagram of the engine heat recycling system in one embodiment of the present application;

[0039] Figure 8 Schematic diagram of the engine heat recycling system in another embodiment of the present application.

[0040] Wherein:

[0041] 10 - engine; 11 - radiator; 12 - second container;

[0042] 20 - energy accumulator;

[0043] 21 - housing; 211 - first input port; 212 - first output port; 213 - second input port; 214 - second output port; 215 - wall; 216 - thermal insulation layer;

[0044] 22 - cavity space; 23 - first pipeline; 24 - second pipeline;

[0045] 30 - heat using system;

[0046] 41 - third pipeline; 42 - fourth pipeline; 43 - heater core; 44 - pumping mechanism; 45 - electric heater; 46 - first container; 47 - three-way valve; 47a - first input end; 47b - second input end; 47c - output end;

[0047] 51 - fifth pipeline; 52 - sixth pipeline; 53 - power battery unit; 54 - pumping mechanism; 55 - electric heater; 56 - temperature sensor; 57 - three-way valve; 57a - first input end; 57b - second input end; 57c - output end; 58 - third container. DETAILED DESCRIPTION

[0048] The present application is herein described, by way of example only, with reference to the accompanying drawings. It is to be understood that various modifications can be made to the embodiments described and equivalents can be substituted without departing from the true spirit and scope of the application. The detailed description includes specific details for the purpose of providing an understanding of the present application. However, it will be apparent to those skilled in the art that the application can be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the understanding of the present application.

[0049] It is also to be understood that the following description is only illustrative of the present application and is not intended to limit the present application in any manner.

[0050] In an embodiment of the engine assembly of the present application, as shown in Figures 2-4 The engine assembly includes an engine 10, a radiator 11 and an energy accumulator 20. The engine 10 is used to convert other energy into mechanical energy for work. The radiator 11 is used to dissipate heat generated by the engine 10 during operation. The energy accumulator 20 includes a housing 21, in which a cavity space 22 is arranged for accommodating energy storage medium. The housing 21 is provided with a first input port 211, a first output port 212, a second input port 213 and a second output port 214. The cavity space 22 is provided with a first pipe 23 and a second pipe 24, the first pipe 23 is connected between the first input port 211 and the second output port 212, and the second pipe 24 is connected between the second input port 213 and the second output port 214. The first input port 211 is connected with a coolant outlet of the engine 10, and the first output port 212 is connected with a coolant inlet of the engine 10; the second input port 213 is used to be connected with a low-temperature medium end of a heat utilization system 30, and the second output port 214 is used to be connected with a high-temperature medium end of the heat utilization system 30.

[0051] Generally, the engine 10 generates heat when converting other energy into mechanical energy for work, and if the heat is directly dissipated, it will cause waste of energy. Therefore, in the present embodiment, the energy accumulator 20 is used to recover and store the heat generated by the engine 10, and provide it to the heat utilization system 30 for use when needed. If the engine 10 generates more heat in a unit of time than the recovery and storage capacity of the energy accumulator 20, the radiator 11 is used to dissipate the excess heat to avoid the temperature of the engine 10 being too high, which affects the normal operation of the engine 10 or causes damage to the engine 10.

[0052] As described in the background section, the heat generated by the engine 10 during operation is not always constant, but fluctuates, and the amount of heat generated varies over time. In particular, for an engine 10 applied to a range-extended vehicle, the engine 10 is generally operated intermittently, and the fluctuation range of the heat generated by the engine 10 is larger. Therefore, directly using the heat carried by the coolant output by the engine 10, for example, for heating the passenger compartment or other devices, cannot well ensure the stability of the temperature, and the experience and effect are poor.

[0053] In this embodiment, the coolant outlet of the engine 10 and the first input port 211 of the energy accumulator 20 are connected, the coolant inlet of the engine 10 and the first output port 212 of the energy accumulator 20 are connected, and the first pipeline 23 is arranged in the cavity space 22 inside the energy accumulator 20, which connects the first input port 211 and the second output port 212. According to the above connection structure, a complete closed loop circulation of the coolant of the engine 10 is formed between the engine 10 and the energy accumulator 20, in which the coolant of the engine 10 absorbs the heat generated by the engine 10 during operation inside the engine 10, then flows out from the coolant outlet of the engine 10, enters the first pipeline 23 through the first input port 211, flows to the first output port 212 through the first pipeline 23, and then flows to the coolant inlet of the engine 10 from the first output port 212, and enters the engine 10 again.

[0054] In the above closed loop circulation process of the coolant, since the energy storage medium is arranged in the cavity space 22 of the energy accumulator 20, when the coolant flows in the first pipeline 23, the coolant can exchange heat with the energy storage medium in the cavity space 22; after heat exchange, the heat carried by the coolant is transferred to the energy storage medium in the cavity space 22, the energy storage medium in the cavity space 22 is heated, and the temperature of the coolant entering the engine 10 from the first output port 212 and the coolant inlet decreases. Finally, the heat generated by the engine 10 during operation is transferred to the cavity space 22 for storage by the energy storage medium with high temperature.

[0055] When the engine 10 is running, whether the engine 10 is in a continuous operation condition or an intermittent operation condition (start after a period of time), the heat generated by the engine 10 is transferred to the energy accumulator 20, which can ensure that the energy storage medium in the cavity space 22 has stable heat.

[0056] In this embodiment, the second input port 213 is used to connect with the low-temperature medium end of the heat utilization system 30, the second output port 214 is used to connect with the high-temperature medium end of the heat utilization system 30, and the second pipeline 24 is arranged in the cavity space 22 inside the energy accumulator 20, and the second pipeline 24 connects between the second input port 213 and the second output port 214. According to the above connection structure, a complete closed loop circulation is also formed between the energy accumulator 20 and the heat utilization system 30. The closed loop circulation also has the refrigerant circulating between the energy accumulator 20 and the heat utilization system 30. When the refrigerant flows in the second pipeline 24 in the energy accumulator 20, it can absorb heat, and when it flows in the heat utilization system 30, it can release heat, thereby transferring the heat stored in the energy accumulator 20 to the heat utilization system 30 for utilization. The heat utilization system 30 can be specifically the passenger cabin of the vehicle, the power battery unit. The heat transferred to the passenger cabin of the vehicle can output hot air to the passenger cabin to improve the temperature in the passenger cabin and increase the temperature comfort of driving and riding; the heat transferred to the power battery unit can be used to heat the power battery unit to ensure that the power battery unit has better working conditions in a low-temperature environment.

[0057] In this embodiment, when the heat stored in the energy accumulator 20 is transferred to the heat utilization system 30 for utilization, since the stored heat in the energy accumulator 20 is stable, it can be stably output to the heat utilization system 30. In this way, better heating effect and experience can be brought, and for the heat utilization system 30, the temperature inside can be kept stable to avoid the situation that the temperature is high and low.

[0058] In an embodiment of the engine assembly, the shell 21 includes a wall body 215 and a thermal insulation layer 216 arranged on the inner side of the wall body 215.

[0059] In this embodiment, the thermal insulation layer 216 arranged in the wall body 215 can play a heat preservation role to avoid the heat stored by the energy storage medium in the cavity space 22 from being quickly lost, thereby increasing the stability of the heat stored by the energy accumulator 20 and helping to better realize the stable output of heat to the heat utilization system 30.

[0060] Specifically, the wall body 215 can be selected to be a metal material or a plastic material, and the thickness of the wall body 215 is in the range of 1-2 mm. The outer side of the wall body 215 can also be coated with a corrosion-resistant layer. The shell 21 with the above structure can have sufficient structural strength and reliability.

[0061] In an embodiment of the engine assembly, the energy storage medium contained in the cavity space 22 is a phase change material, or also called a chemical heat storage material.

[0062] In this embodiment, the phase change material or the chemical heat storage material can absorb heat or release heat through phase change, and the efficiency of heat absorption and release can be higher.

[0063] In an embodiment of the first engine heat recovery system of the present application, as shown in Figure 5 The third pipeline 41 is connected between the second output port 214 of the energy accumulator 20 in the engine assembly and the heater core 43, and the fourth pipeline 42 is connected between the second input port 213 of the energy accumulator 20 in the engine assembly and the heater core 43, so as to form a closed loop circulation between the second pipeline 24 and the heater core 43, which can be referred to as a first closed loop circulation. The refrigerant is arranged in the first closed loop circulation between the second pipeline 24 and the heater core 43, and the pumping mechanism 44 is used to drive the refrigerant to flow in the first closed loop circulation.

[0064] In this embodiment, for the engine assembly, the engine 10 is connected with the radiator 11 and the energy accumulator 20. During the operation of the engine 10, the heat generated by the engine 10 is first transmitted to the energy storage medium stored in the cavity space 22 of the energy accumulator 20. When the heat generated by the engine 10 in a unit time is relatively large, the excess heat is dissipated through the radiator 11, so as to prevent the engine 10 from being overheated and damaged.

[0065] After the heat generated by the engine 10 is transferred to the energy accumulator 20 and stored, the energy storage medium in the energy accumulator 20 contains a relatively high heat.

[0066] In this embodiment, as described above, the first closed loop circulation is established between the second pipeline 24 and the heater core 43, and the pumping mechanism 44 can drive the refrigerant to flow in the first closed loop circulation. When the refrigerant flows in the second pipeline 24, it can absorb the heat contained in the energy storage medium in the cavity space 22 of the energy accumulator 20, and then release the heat when flowing to the heater core 43. The released heat can heat the air to form hot air, and the hot air is blown into the passenger compartment of the vehicle, so as to increase the temperature of the passenger compartment of the vehicle and improve the temperature comfort of the driver and passengers in the passenger compartment of the vehicle.

[0067] Specifically, the third pipeline 41 is provided with an electric heater 45. The electric heater 45 can heat the refrigerant in the above-mentioned first closed loop circulation.

[0068] When the heat stored in the accumulator 20 is insufficient (for example, at the initial stage of starting the engine 10, the accumulator 20 has not stored enough heat, or the heat generated by the engine 10 is small, and the heat stored in the accumulator 20 continues to decrease to be insufficient), the refrigerant in the above-mentioned first closed cycle cannot obtain enough heat from the accumulator 20, and thus the warm air core 43 cannot obtain enough heat from the accumulator 20 alone. In this case, the electric heater 45 is started, and the refrigerant in the above-mentioned first closed cycle is heated by the electric heater 45, so that the refrigerant can have enough heat, and the heat is released when the refrigerant flows to the warm air core 43, so that the warm air core 43 can generate corresponding hot air, which is blown into the passenger compartment of the vehicle to increase the temperature of the passenger compartment of the vehicle.

[0069] Specifically, the engine heat recycling system can further include a first container 46, which is connected between the third pipeline 41 and the fourth pipeline 42. When the refrigerant in the first closed cycle expands due to high temperature, or when the amount of refrigerant required in the first closed cycle decreases, the first container 46 has a space for storing the refrigerant in the above-mentioned first closed cycle; and when the refrigerant in the first closed cycle contracts due to low temperature, or when the amount of refrigerant required in the first closed cycle increases, the refrigerant stored in the first container 46 can be supplemented to the above-mentioned first closed cycle.

[0070] Similarly to the above-mentioned first container 46, on the side of the engine 10, a second container 12 is provided between the engine 10 and the radiator 11, and the second container 12 has a similar function to the first container 46.

[0071] In one embodiment of the engine heat recycling system, as shown in Figure 6 the engine heat recycling system further includes an electric heater 45 and a three-way valve 47. The three-way valve 47 has a first input end 47a, a second input end 47b and an output end 47c. The first input end 47a and the output end 47c of the three-way valve 47 are connected to the third pipeline 41. The electric heater 45 has an input port and an output port, wherein the output port is connected to the second input end 47b of the three-way valve 47, and the input port is connected to the fourth pipeline 42.

[0072] In this embodiment, by controlling the on-off state of the three-way valve 47, the first closed loop cycle described above can be formed between the second pipeline 24 and the heater core 43, or the second closed loop cycle can be formed between the electric heater 45 and the heater core 43. Specifically, when the first input end 47a and the output end 47c of the three-way valve 47 are connected, and the second input end 47b and the output end 47c are disconnected, the first closed loop cycle described above is formed, and the refrigerant can circulate between the second pipeline 24 and the heater core 43; while when the first input end 47a and the output end 47c of the three-way valve 47 are disconnected, and the second input end 47b and the output end 47c are connected, the second closed loop cycle described above is formed, and the refrigerant can circulate between the electric heater 45 and the heater core 43.

[0073] When the heat stored in the accumulator 20 is sufficient, the first input end 47a and the output end 47c of the three-way valve 47 are connected, and the second input end 47b and the output end 47c are disconnected. At this time, the refrigerant in the first closed loop cycle described above flows through the second pipeline 24, and obtains sufficient heat from the accumulator 20 when flowing through the second pipeline 24, and these heat is released when the refrigerant flows through the heater core 43, so that the heater core 43 can generate corresponding hot air, which is blown into the passenger compartment of the vehicle to improve the temperature of the passenger compartment of the vehicle. While when the heat stored in the accumulator 20 is insufficient, the first input end 47a and the output end 47c of the three-way valve 47 are disconnected, and the second input end 47b and the output end 47c are connected. At this time, the refrigerant in the first closed loop cycle described above no longer flows through the second pipeline 24, but flows through the electric heater 45, and the electric heater 45 heats the refrigerant so that the refrigerant has sufficient heat, and these heat is released when the refrigerant flows through the heater core 43, so that the heater core 43 can generate corresponding hot air, which is blown into the passenger compartment of the vehicle to improve the temperature of the passenger compartment of the vehicle.

[0074] In the second embodiment of the engine heat recycling system provided by the present application, as shown in Figure 7 the engine heat recycling system includes the engine assembly described in the above embodiment, and further includes a fifth pipeline 51, a sixth pipeline 52, a power battery unit 53, and a pumping mechanism 54. The fifth pipeline 51 is connected between the second output port 214 of the accumulator 20 in the engine assembly and the power battery unit 53, and the sixth pipeline 52 is connected between the second input port 213 of the accumulator 20 in the engine assembly and the power battery unit 53, to form a closed loop cycle between the second pipeline 24 and the power battery unit 53, which is referred to as a first closed loop cycle. The refrigerant is arranged in the first closed loop cycle between the second pipeline 24 and the power battery unit 53, and the pumping mechanism 54 is used to drive the refrigerant to flow in the first closed loop cycle.

[0075] In this embodiment, for the engine assembly, the engine 10 is connected with the radiator 11 and the energy storage device 20; during the operation of the engine 10, the heat generated by the engine 10 is first transmitted to the energy storage medium stored in the cavity space 22 of the energy storage device 20; when the heat generated by the engine 10 in a unit of time is relatively large, the excess heat is dissipated through the radiator 11 to ensure that the engine 10 will not overheat and abnormally work or be damaged.

[0076] After the heat generated by the engine 10 is transferred to the energy storage device 20 and stored, the energy storage medium in the energy storage device 20 contains a relatively high heat.

[0077] In this embodiment, as described above, the first closed loop circulation is established between the second pipeline 24 and the power battery unit 53, and the pumping mechanism 54 can drive the refrigerant to flow in the first closed loop circulation; when the refrigerant flows in the second pipeline 24, it can absorb the heat contained in the energy storage medium in the cavity space 22 of the energy storage device 20, and then release the heat when flowing to the power battery unit 53; the released heat can heat the power battery unit 53, so that the power battery unit 53 works in a suitable temperature range and has better battery performance. In the above process, by controlling the flow or flow rate of the refrigerant in the first closed loop circulation (which can be achieved by means of the pumping mechanism 54), the heat released by the refrigerant in the power battery unit 53 can be adjusted, that is, the temperature of the power battery unit 53 can be controlled to avoid the temperature of the power battery unit 53 being too high or too low.

[0078] Specifically, the fifth pipeline 51 is provided with a temperature sensor 56. By arranging the temperature sensor 56, the temperature of the refrigerant can be detected.

[0079] Specifically, the engine heat recycling system further comprises a third container 58; the third container 58 is connected between the fifth pipeline 51 and the sixth pipeline 52. When the refrigerant in the first closed loop circulation expands due to high temperature, or when the amount of refrigerant required in the first closed loop circulation decreases, the space of the third container 58 is used to store the refrigerant in the first closed loop circulation; when the refrigerant in the first closed loop circulation shrinks due to low temperature or the like, or when the amount of refrigerant required in the first closed loop circulation increases, the refrigerant stored in the third container 58 can be supplemented to the first closed loop circulation.

[0080] In one embodiment of the engine heat recycling system, as Figure 8As shown, the engine heat recycling system further comprises an electric heater 55 and a three-way valve 57. The three-way valve 57 has a first input end 57a, a second input end 57b and an output end 57c; the first input end 57a and the output end 57c of the three-way valve 57 are connected to the fifth pipeline 51. The electric heater 55 has an input port and an output port, wherein the output port is connected to the second input end 57b of the three-way valve 57, and the input port is connected to the sixth pipeline 52.

[0081] In this embodiment, by controlling the on-off state of the three-way valve 57, the first closed loop cycle described above can be formed between the second pipeline 24 and the power battery unit 53, or the second closed loop cycle can be formed between the electric heater 55 and the power battery unit 53. Specifically, when the first input end 57a and the output end 57c of the three-way valve 57 are connected, and the second input end 57b and the output end 57c are disconnected, the first closed loop cycle described above is formed, and the refrigerant can circulate between the second pipeline 24 and the power battery unit 53; while when the first input end 57a and the output end 57c of the three-way valve 57 are disconnected, and the second input end 57b and the output end 57c are connected, the second closed loop cycle described above is formed, and the refrigerant can circulate between the electric heater 55 and the power battery unit 53.

[0082] When the heat stored in the energy accumulator 20 is sufficient, the first input end 57a and the output end 57c of the three-way valve 57 are connected, and the second input end 57b and the output end 57c are disconnected. At this time, the refrigerant in the first closed loop cycle described above flows through the second pipeline 24, and obtains sufficient heat from the energy accumulator 20 when flowing through the second pipeline 24, and the heat is released when the refrigerant flows through the power battery unit 53. The released heat insulates the power battery unit 53, so that the power battery unit 53 works in its suitable temperature range, and has better battery performance. When the heat stored in the energy accumulator 20 is insufficient, the first input end 57a and the output end 57c of the three-way valve 57 are disconnected, and the second input end 57b and the output end 57c are connected. At this time, the refrigerant in the first closed loop cycle described above no longer flows through the second pipeline 24, but flows through the electric heater 55, and the electric heater 55 heats the refrigerant, so that the refrigerant has sufficient heat, and the heat is released when the refrigerant flows through the power battery unit 53. The released heat insulates the power battery unit 53, so that the power battery unit 53 works in its suitable temperature range, and has better battery performance.

[0083] In the embodiment of the vehicle provided by the present application, the vehicle comprises the engine assembly described in the above embodiments, or comprises the first or second engine heat recycling system described in the above embodiments; or can comprise one, two or all of the above engine assembly and engine heat recycling system.

[0084] Specifically, the vehicle in the embodiment can be a range-extending vehicle. Of course, in addition to the range-extending vehicle, the vehicle in the embodiment can also be other vehicles with an engine. Moreover, the engine in the embodiment should be understood in a broad sense, and any mechanical device that can convert other energy into mechanical energy, can do work, and generates heat during the working process, all belong to the category of the engine in the embodiment.

[0085] The vehicle in the embodiment includes the engine assembly or the engine heat recycling system described above, and of course has the beneficial effects consistent with the engine assembly and the engine heat recycling system described above, which will not be repeated here.

[0086] The above embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent replacement or transformation made by those skilled in the art based on the present application is within the protection scope of the present application.

Claims

1. An engine heat recovery and utilization system, characterized in that, The engine heat recovery system includes an engine assembly, as well as a third pipeline (41), a fourth pipeline (42), a heater core (43), and a pumping mechanism (44); The engine assembly includes an engine (10) and an energy storage device (20); the energy storage device (20) includes a housing (21) and a cavity space (22) is provided inside the housing (21) for containing an energy storage medium; The housing (22) is provided with a first input port (211), a first output port (212), a second input port (213), and a second output port (214); the cavity space (22) is provided with a first pipe (23) and a second pipe (24), the first pipe (23) being connected between the first input port (211) and the second output port (212), and the second pipe (24) being connected between the second input port (213) and the second output port (214); The first input port (211) is connected to the coolant outlet of the engine (10), and the first output port (212) is connected to the coolant inlet of the engine (10); the second input port (213) is used to connect to the low-temperature medium end of the heat system (30), and the second output port (214) is used to connect to the high-temperature medium end of the heat system (30); The third pipe (41) is connected between the second output port (214) of the energy storage device (20) in the engine assembly and the heater core (43), and the fourth pipe (42) is connected between the second input port (213) of the energy storage device (20) in the engine assembly and the heater core (43) to form a closed loop between the second pipe (24) and the heater core (43); A refrigerant is provided in the closed loop between the second pipeline (24) and the warm air core (43), and the pumping mechanism (44) is used to drive the refrigerant to flow in the closed loop; The engine heat recovery system also includes a first container (46); the first container (46) is connected between the third pipe (41) and the fourth pipe (42); An electric heater (45) is installed on the third pipeline (41), or, The engine heat recovery system also includes an electric heater (45) and a three-way valve (47); The three-way valve (47) has a first input end (47a), a second input end (47b) and an output end (47c); the first input end (47a) and the output end (47c) of the three-way valve (47) are connected to the third pipeline (41); The electric heater (45) has an inlet and an outlet. The outlet is connected to the second inlet (47b) of the three-way valve (47), and the inlet is connected to the fourth pipeline (42).

2. The engine heat recovery and utilization system according to claim 1, characterized in that, The housing (21) includes a wall (215) and a heat insulation layer (216), the heat insulation layer (216) being disposed on the inner side of the wall (215).

3. The engine heat recovery and utilization system according to claim 2, characterized in that, The wall (215) is made of metal, and / or the thickness of the wall (215) is in the range of 1 to 2 mm.

4. The engine heat recovery and utilization system according to claim 1, characterized in that, The energy storage medium is a phase change material.

5. An engine heat recovery and utilization system, characterized in that, The engine heat recovery system includes an engine assembly, as well as a fifth pipeline (51), a sixth pipeline (52), a power battery unit (53), and a pumping mechanism (54); The engine assembly includes an engine (10) and an energy storage device (20); the energy storage device (20) includes a housing (21) and a cavity space (22) is provided inside the housing (21) for containing an energy storage medium; The housing (22) is provided with a first input port (211), a first output port (212), a second input port (213), and a second output port (214); the cavity space (22) is provided with a first pipe (23) and a second pipe (24), the first pipe (23) being connected between the first input port (211) and the second output port (212), and the second pipe (24) being connected between the second input port (213) and the second output port (214); The first input port (211) is connected to the coolant outlet of the engine (10), and the first output port (212) is connected to the coolant inlet of the engine (10); the second input port (213) is used to connect to the low-temperature medium end of the heat system (30), and the second output port (214) is used to connect to the high-temperature medium end of the heat system (30); The engine heat recovery system also includes a third container (58); the first container (58) is connected between the fifth pipe (51) and the sixth pipe (52); The engine heat recovery system also includes an electric heater (55) and a three-way valve (57); The three-way valve (57) has a first input end (57a), a second input end (57b) and an output end (57c); the first input end (57a) and the output end (57c) of the three-way valve (57) are connected to the fifth pipeline (51); The electric heater (55) has an inlet and an outlet, the outlet being connected to the second inlet (57b) of the three-way valve (57), and the inlet being connected to the sixth pipeline (52); The fifth pipe (51) is connected between the second output port (214) of the energy storage device (20) in the engine assembly and the power battery unit (53), and the sixth pipe (52) is connected between the second input port (213) of the energy storage device (20) in the engine assembly and the power battery unit (53) to form a closed loop between the second pipe (24) and the power battery unit (53); A refrigerant is provided in the closed loop between the second pipeline (24) and the power battery unit (53), and the pumping mechanism (54) is used to drive the refrigerant to flow in the closed loop.

6. The engine heat recovery system according to claim 5, characterized in that, A temperature sensor (56) is installed on the fifth pipeline (51).

7. A vehicle, characterized in that, The vehicle includes the engine heat recovery system according to any one of claims 1 to 4, and / or includes the engine heat recovery system according to any one of claims 5 to 6.

8. The vehicle according to claim 7, characterized in that, The vehicle in question is a range-extended vehicle.

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