Waste heat recovery device, heat management system and automobile

Abstract

The utility model provides a waste heat recovery device, a heat management system and an automobile. The waste heat recovery device comprises an air inlet pipe, an air outlet pipe, an exhaust pipe and at least one heat exchanger, one end of the exhaust pipe is communicated with the air inlet pipe, the other end of the exhaust pipe is communicated with the air outlet pipe, an exhaust cavity is formed in the exhaust pipe, and each heat exchanger comprises a coil pipe, a guide-in pipe and a guide-out pipe. The leading-in pipe and the leading-out pipe are connected with the two opposite ends of the coil pipe. The heat management system comprises to-be-heated equipment and a waste heat recovery device, the waste heat recovery device is connected with the to-be-heated equipment, and the waste heat recovery device recovers heat to heat the to-be-heated equipment. The automobile comprises a thermal management system and an input module, and the input module inputs operation instructions to control the thermal management system. The variable-curvature spiral pipe can guide exhausted gas to enter the exhaust pipe from the gas inlet pipe so as to form diversion to reduce impact, gas flowing can be slowed down to increase the contact area with the exhausted gas, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a waste heat recovery device, a thermal management system and an automobile. Background Art

[0002] As people pay more and more attention to environmental protection and low carbon, the pace of development of new energy vehicles has also accelerated significantly. The integration of automobiles with related technologies in the fields of energy, transportation, information and communication has accelerated, and electrification, networking and intelligence have become the development trend and trend of the automobile industry. New technologies for new energy vehicles have sprung up like mushrooms after a rain, for example: the application number is CN202110228793.2, the invention name is hybrid power system, hybrid vehicle and control method thereof; the application number is CN202110231482.1, the invention name is hybrid power system, hybrid vehicle and control method thereof, vehicle controller; the application number is CN202110251139.3, the invention name is hybrid power system, hybrid vehicle and control method thereof, vehicle controller; the application number is CN202010609385.7, the invention name is vehicle power generation control method, device and vehicle; all describe hybrid technology based on electricity, which has multiple advantages such as fast, economical, quiet, smooth and green. The application number is CN202311373582.3, and the invention name is vehicle control method, medium and vehicle; the application number is CN202311351004.X, and the invention name is vehicle braking method, brake controller, storage medium and vehicle; the application number is CN202311222836.1, and the invention name is parking method, medium and vehicle; the application number is CN202311164098.X, and the invention name is vehicle control system, method and vehicle; the application number is CN202311170393.6, and the invention name is vehicle control system, control method, controller and vehicle; the application number is CN202211678720.4, and the invention name is vehicle power control method, device, medium, vehicle controller and vehicle; the application number is The application number is CN202211469445.5, and the name of the invention is vehicle and its control method, device, medium, and electronic device; the application number is CN202210182808.0, and the name of the invention is tire pressure identification device and vehicle; the application number is CN202110744962.8, and the name of the invention is electric drive assembly, four-wheel drive system and automobile; the application number is CN202110474242.4, and the name of the invention is steering control method, electronic control unit, system and vehicle for vehicle; the application number is CN202110351399.8, and the name of the invention is braking control method, device, medium and electronic device; all describe a power system with four wheel-side motors independently driven as the core, which greatly improves the safety and power of new energy vehicles.

[0003] With the development of science and technology, the demand and application of automobiles are gradually increasing. Automobiles will produce automobile exhaust during startup and driving. Automobile exhaust contains not only a large amount of gas but also a large amount of heat. Directly discharging gas to treat automobile exhaust will cause a large amount of heat to be discharged into the external environment, aggravating the greenhouse effect. At the same time, it will cause a waste of energy and is not conducive to the recycling of energy. Therefore, it is necessary to design a waste heat recovery device to recycle the heat contained in it to save energy and reduce emissions. However, the coil used in the existing waste heat recovery device is an equal curvature spiral tube. The equal curvature spiral tube cannot effectively guide the gas from the intake pipe with a smaller inner diameter into the exhaust pipe with a larger inner diameter, thereby causing a sudden change in gas pressure and causing impact. In addition, the contact area between the exhaust gas and the equal curvature spiral tube is small, resulting in low heat exchange efficiency. Utility Model Content

[0004] The embodiments of the present application provide a waste heat recovery device, a thermal management system and a vehicle, which can solve at least part of the above-mentioned technical problems.

[0005] In a first aspect, the present application provides a waste heat recovery device, comprising:

[0006] Intake pipe;

[0007] Exhaust pipe;

[0008] An exhaust pipe, one end of which is connected to the air inlet pipe, the other end of which is connected to the air outlet pipe, and an exhaust cavity is provided in the exhaust pipe;

[0009] At least one heat exchanger, each of the heat exchangers includes a coil and an inlet pipe and an outlet pipe, wherein the coil is a variable curvature spiral tube and is accommodated in the exhaust chamber, the inlet pipe and the outlet pipe are respectively connected to the opposite ends of the coil, the inlet pipe is used to introduce a cooling medium into the coil, and the outlet pipe is used to outlet the cooling medium from the coil, so as to recover the heat in the exhaust chamber by absorbing the heat in the exhaust chamber through the cooling medium.

[0010] In a second aspect, the present application provides a thermal management system, comprising:

[0011] Equipment to be heated;

[0012] The above-mentioned waste heat recovery device is connected to the equipment to be heated, and is used to recover the heat of the exhaust gas, and the recovered heat is used to heat the equipment to be heated.

[0013] In a third aspect, the present application provides a car, comprising:

[0014] The thermal management system described above;

[0015] An input module, the input module is used to input user operation instructions to control the thermal management system; wherein the operation instructions include at least one of air conditioning heating instructions, engine heating instructions, and battery charging instructions.

[0016] The present application provides a waste heat recovery device, a thermal management system and a car. The waste heat recovery device includes an intake pipe, an outlet pipe, an exhaust pipe and at least one heat exchanger. One end of the exhaust pipe is connected to the intake pipe, and the other end of the exhaust pipe is connected to the outlet pipe. An exhaust cavity is arranged in the exhaust pipe. Each of the heat exchangers includes a coil, an inlet pipe and an outlet pipe. The coil is a variable curvature spiral pipe and is accommodated in the exhaust cavity. The inlet pipe and the outlet pipe connect the opposite ends of the coil. The thermal management system includes a device to be heated and a waste heat recovery device. The waste heat recovery device is connected to the device to be heated, and the waste heat recovery device recovers heat to heat the device to be heated. The car includes a thermal management system and an input module. The input module inputs an operation instruction to control the thermal management system. The variable curvature spiral pipe of the present application can guide the exhaust gas from the intake pipe into the exhaust pipe to form a diversion to reduce the impact, and can also slow down the gas flow to increase the contact area with the exhaust gas, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic block diagram of a car in an embodiment of the present application.

[0019] Figure 2 Schematic diagram of a thermal management system in an embodiment of the present application.

[0020] Figure 3 Schematic diagram of the overall structure of the thermal management system in an embodiment of the present application.

[0021] Figure 4 It is an overall schematic diagram of the waste heat recovery device in the embodiment of the present application.

[0022] Figure 5 for Figure 4 Schematic diagram of the heat exchanger in FIG.

[0023] Figure Number:

[0024] Cars - 100;

[0025] Thermal management system-200; Input module-300;

[0026] Waste heat recovery device-1; air inlet pipe-11; air outlet pipe-12; exhaust pipe-13; exhaust cavity-131; outer cavity-132; heat exchanger-14; first heat exchanger-141; second heat exchanger-142; coil-15; first coil-151; second coil-152; inlet pipe-16; first inlet pipe-161; second inlet pipe-162; outlet pipe-17; first outlet pipe-171; second outlet pipe-172;

[0027] Equipment to be heated-2; engine-21; engine heating pipe-211; battery-22; battery heating pipe-221; heater core-23; heater core heating pipe-231; first diverter valve-3; first end-31; second end-32; third end-33; second diverter valve-4; fourth end-41; fifth end-42; sixth end-43; first water pump-5; second water pump-6; controller-7; thermostat-8; first valve-81; second valve-82. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] In the description of the embodiments of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings. The term "connection" in this application, unless otherwise specified, mainly refers to a physical structural connection, and may also include meanings such as direct connection or indirect connection when specified. The terms "first" and "second" in the specification and claims of this application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the term "includes" and any variations thereof are intended to cover non-exclusive inclusions.

[0030] See also Figure 1 , Figure 1 1 is a schematic block diagram of a car 100 in an embodiment of the present application. The car 100 includes a thermal management system 200 and an input module 300. The input module 300 is used to input a user's operating instruction to control the thermal management system 200. The operating instruction includes at least one of an air conditioning heating instruction, an engine heating instruction, and a battery charging instruction.

[0031] Therefore, when the user is driving or starting the car 100, the user can input operation instructions through the input module 300 to control the thermal management system 200, so that the thermal management system 200 heats the air conditioner, engine, battery, etc. as needed, thereby improving the user's experience.

[0032] The thermal management system 200 enables the air conditioner, engine, and battery to operate at a suitable temperature through methods such as heat dissipation, heating, and heat preservation, so as to ensure the functional safety and service life of the automobile 100.

[0033] It can be understood that the input module 300 can be a central control screen, a voice input module, a controllable button, etc. in the cab of the automobile 100. The user controls the thermal management system 200 by touching the central control screen, inputting voice through the voice input module, or pressing the corresponding control button to make the input module 300 generate an operation instruction.

[0034] It is understandable that, in some other embodiments, the input module 300 may also be a smart terminal that is communicatively connected to the vehicle computer of the automobile 100 or directly communicatively connected to the thermal management system 200. The smart terminal may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, etc.

[0035] Please also read Figure 2 and Figure 3 , Figure 2 is a schematic block diagram of a thermal management system 200 in an embodiment of the present application, Figure 3 Schematic diagram of the overall structure of the thermal management system 200 in the embodiment of the present application. The thermal management system 200 includes a device to be heated 2 and a waste heat recovery device 1. The waste heat recovery device 1 is connected to the device to be heated 2. The waste heat recovery device 1 is used to recover the heat of the exhaust gas, and the recovered heat is used to heat the device to be heated 2.

[0036] Therefore, during the idling warm-up or driving process of the automobile 100, the exhaust temperature of the exhaust gas rises faster and at a higher temperature than the cooling medium temperature. Therefore, the cooling medium can be sent to the waste heat recovery device 1, and the heat of the exhaust gas of the automobile 100 can be recovered by the waste heat recovery device 1 to heat the equipment to be heated 2 inside the automobile 100, so that the automobile 100 can achieve energy conservation and emission reduction and improve energy utilization.

[0037] In some embodiments, the device to be heated 2 includes at least one of an engine 21 , a battery 22 , and a heater core 23 .

[0038] Among them, the user can warm up the engine 21 when the engine 21 is started at a low temperature so that the engine 21 can achieve the best performance, and can also heat the battery 22 in a low temperature environment to increase the temperature of the battery 22 and increase the discharge power of the battery 22; and, when using air conditioning, the heater core 23 can be heated to increase the cockpit temperature of the car 100 to meet the user's heating needs, so as to apply the heat recovered by the waste heat recovery device 1 to multiple scenarios as much as possible.

[0039] It is understandable that in other embodiments, the device to be heated 2 is not limited to at least one of the engine 21, the battery 22 and the heater core 23. The device to be heated 2 may also be other devices in the automobile 100, which can be selected according to actual needs and is not limited here.

[0040] Please also read Figure 4 and Figure 5 , Figure 4 is an overall schematic diagram of the waste heat recovery device 1 in the embodiment of the present application, Figure 5 for Figure 4 The waste heat recovery device 1 includes an air inlet pipe 11, an air outlet pipe 12, an exhaust pipe 13 and at least one heat exchanger 14, one end of the exhaust pipe 13 is connected to the air inlet pipe 11, and the other end of the exhaust pipe 13 is connected to the air outlet pipe 12, an exhaust cavity 131 is arranged in the exhaust pipe 13, each of the heat exchangers 14 includes a coil 15, an inlet pipe 16 and an outlet pipe 17, wherein the coil 15 is a variable curvature spiral pipe and is accommodated in the exhaust cavity 131, the inlet pipe 16 and the outlet pipe 17 are respectively connected to the opposite ends of the coil 15, the inlet pipe 16 is used to introduce the cooling medium into the coil 15, and the outlet pipe 17 is used to export the cooling medium from the coil 15, so as to recover the heat in the exhaust cavity 131 by absorbing the heat in the exhaust cavity 131 through the cooling medium.

[0041] Thus, the coil 15 is a variable curvature spiral tube, which can effectively guide the exhaust gas from the intake pipe 11 into the exhaust pipe 13 to form a diversion to slow down the flow of gas, reduce the possibility of sudden changes in gas pressure and reduce impact, and at the same time, by guiding the exhaust gas into the exhaust pipe 13, the contact area between the exhaust gas and the coil 15 is increased, the heat exchange efficiency is improved, and the possibility of abnormal noise during heat recovery is reduced, and congestion can be avoided when the exhaust gas enters the outlet pipe 12 from the exhaust pipe 13; and the heat exchanger 14 exchanges heat with the heat of the exhaust gas of the engine 21 through the intake pipe 11 to absorb the waste heat of the exhaust gas to save energy and reduce emissions, and also improve energy utilization. The exhaust gas is generated by the combustion of fuel in the engine 21 and the volatilization of the fuel itself, and is discharged into the intake pipe 11 and then enters the waste heat recovery device 1.

[0042] Among them, the waste heat recovery device 1 is connected to the equipment to be heated 2 in such a way that the outlet pipe 17 of the heat exchanger 14 is connected to the equipment to be heated 2, that is, the outlet pipe 17 of the heat exchanger 14 can be connected to at least one of the engine 21, the battery 22 and the heater core 23.

[0043] Thus, when the outlet pipe 17 of the heat exchanger 14 of the waste heat recovery device 1 is connected to at least one of the equipment to be heated 2, namely the engine 21, the battery 22 and the heater core 23, the engine can be heated, air conditioning heating can be achieved through the heater core 23, and the battery 22 can be heated, thereby improving equipment performance and reducing energy consumption.

[0044] In some embodiments, the inner diameter of the exhaust pipe 13 is larger than the inner diameters of the air inlet pipe 11 and the air outlet pipe 12 , and the curvature diameter of the ends of the coil 15 close to the air inlet pipe 11 and the air outlet pipe 12 is less than or equal to the inner diameters of the air inlet pipe 11 and the air outlet pipe 12 .

[0045] Therefore, the inner diameter of the exhaust pipe 13 is larger than the inner diameters of the intake pipe 11 and the outlet pipe 12, which can reduce the flow velocity of the exhaust gas, so that the exhaust gas stays in the exhaust chamber 131 for a longer time, which is convenient for the heat exchanger 14 to exchange heat and improve the heat recovery rate; and the curvature diameter of the end of the coil 15 is less than or equal to the inner diameters of the intake pipe 11 and the outlet pipe 12, so as to effectively guide the waste to flow along the coil 15, increase the contact area between the exhaust gas and the coil 15, avoid the heat from being quickly discharged into the air through the exhaust pipe 13 with the exhaust gas, and improve the heat exchange efficiency and energy heat exchange rate.

[0046] The air inlet pipe 11 is disposed close to the catalyst of the automobile 100 , and the air outlet pipe 12 is disposed close to the muffler of the automobile 100 .

[0047] In some embodiments, the exhaust pipe 13 is provided with an outer cavity 132 adjacent to the exhaust cavity 131 , and a heat-insulating material is arranged in the outer cavity 132 to prevent the temperature in the exhaust cavity 131 from diffusing outwards.

[0048] It is understandable that the thermal insulation material may be, but is not limited to, ceramic fiber wool, and may be selected according to actual needs and is not limited here.

[0049] In some embodiments, please refer again to Figure 3 The thermal management system 200 also includes a first diverter valve 3. The device to be heated 2 includes an engine 21, a battery 22 and a heater core 23. The thermal management system 200 includes a battery heating pipe 221, a heater core heating pipe 231 and an engine heating pipe 211. One end of the first diverter valve 3 is connected to the outlet pipe 17, and the other end is respectively connected to one end of the battery heating pipe 221 and the heater core heating pipe 231. The other end of the battery heating pipe 221 and the other end of the heater core heating pipe 231 are both connected to one end of the engine heating pipe 211, wherein the battery heating pipe 221 is arranged in the battery 22, the heater core heating pipe 231 is arranged in the heater core 23, and the engine heating pipe 211 is arranged in the engine 21.

[0050] Therefore, the setting of the first diverter valve 3 can distribute the heat exchange amount according to the actual situation and user needs, while increasing the temperature of the battery 22 and meeting the user's heating needs, thereby improving the energy utilization rate.

[0051] In some embodiments, please refer again to Figure 4 and Figure 5 The at least one heat exchanger 14 includes a first heat exchanger 141 and a second heat exchanger 142 , and the first heat exchanger 141 and the second heat exchanger 142 are arranged side by side along the direction of the exhaust pipe 13 from the intake pipe 11 to the outlet pipe 12 .

[0052] Thus, the heat exchanger 14 is set to a two-stage type, which can be used to warm up the engine 21, the cockpit air conditioning and the battery 22 respectively, so as to improve energy utilization. The first heat exchanger 141 and the second heat exchanger 142 can also be connected in series through pipelines to form a heat exchanger 14 to improve heat exchange efficiency. The first heat exchanger 141 and the second heat exchanger 142 can also be used separately. The specific usage method can be flexibly changed in different scenarios so as to be flexibly used according to the actual operation of the automobile 100, thereby improving the user's experience and facilitating the thermal management system 200 to recover the heat of the exhaust gas as needed and heat the device 2 to be heated to reduce energy consumption.

[0053] In some embodiments, the first heat exchanger 141 includes a first coil 151, a first inlet pipe 161 and a first outlet pipe 171, the first coil 151 is a variable curvature spiral tube, the first inlet pipe 161 passes through the tube wall of the exhaust pipe 13 to the exhaust cavity 131 to connect the end of the first coil 151 close to the intake pipe 11, and the first outlet pipe 171 passes through the tube wall of the exhaust pipe 13 to the exhaust cavity 131 to connect the end of the first coil 151 away from the intake pipe 11.

[0054] Thus, the first heat exchanger 141 introduces the cooling medium into the first coil 151 through the first inlet pipe 161 to recover the heat of the exhaust gas, and exports the heated cooling medium through the first outlet pipe 171 to heat the device to be heated 2, thereby reducing energy consumption and improving energy utilization.

[0055] In some embodiments, the second heat exchanger 142 includes a second coil 152, a second inlet pipe 162 and a second outlet pipe 172, the second coil 152 is a variable curvature spiral tube, the second inlet pipe 162 passes through the tube wall of the exhaust pipe 13 to the exhaust cavity 131 to connect the end of the second coil 152 away from the outlet pipe 12, and the second outlet pipe 172 passes through the tube wall of the exhaust pipe 13 to the exhaust cavity 131 to connect the end of the second coil 152 close to the outlet pipe 12.

[0056] Thus, the second heat exchanger 142 introduces the cooling medium into the second coil 152 through the second inlet pipe 162 to cooperate with the first heat exchanger 141 to perform a second heat recovery on the exhaust gas, and exports the heated cooling medium through the second outlet pipe 172 to heat the equipment to be heated 2, thereby reducing energy consumption and improving energy utilization.

[0057] In some embodiments, the first inlet pipe 161, the first outlet pipe 171, the second inlet pipe 162 and the second outlet pipe 172 all pass into the exhaust chamber 131 in the same direction, and then connect the first coil 151 and the second coil 152, so as to facilitate the first heat exchanger 141 and the second heat exchanger 142 to be connected in series.

[0058] In some embodiments, the first outlet pipe 171 of the first heat exchanger 141 is connected to the second inlet pipe 162 of the second heat exchanger 142, the first inlet pipe 161 of the first heat exchanger 141 is connected to the engine heating pipe 211, and the second outlet pipe 172 of the second heat exchanger 142 is connected to the first diverter valve 3.

[0059] In some embodiments, the first diverter valve 3 includes a first end 31, a second end 32 and a third end 33, the first end 31 is connected to the second outlet pipe 172, the second end 32 is connected to the battery heating pipe 221, and the third end 33 is connected to the heater core heating pipe 231, so as to distribute heat by controlling the opening / closing of the first end 31, the second end 32 and the third end 33 and the flow rate.

[0060] Therefore, the setting of the first diverter valve 3 allows the user to distribute the heat exchange amount according to actual conditions, thereby improving the utilization rate of energy.

[0061] In some embodiments, the thermal management system 200 further includes a second diverter valve 4 , wherein the second diverter valve 4 is connected between the first outlet pipe 171 and the second inlet pipe 162 , and the second diverter valve 4 is also connected to the engine heating pipe 211 .

[0062] Therefore, the thermal management system 200 can control the heat exchange amount by controlling the flow rate of the cooling medium flowing out of the second diverter valve 4, thereby achieving multi-stage regulation.

[0063] In some embodiments, the second diverter valve 4 includes a fourth end 41, a fifth end 42 and a sixth end 43, the fourth end 41 is connected to the first outlet pipe 171, the fifth end 42 is connected to the engine heating pipe 211, and the sixth end 43 is connected to the second inlet pipe 162, so as to distribute heat by controlling the opening / closing and flow rate of the fourth end 41, the fifth end 42 and the sixth end 43.

[0064] Thus, by connecting the second diverter valve 4 in series in the first heat exchanger 141 and the second heat exchanger 142, the heat exchange amount of the first heat exchanger 141 can be properly distributed, so that the engine 21 can be heated to an optimal temperature to achieve optimal performance, thereby improving energy utilization while saving energy consumption.

[0065] In some embodiments, the thermal management system 200 further includes a first water pump 5 , which is connected between the engine heating pipe 211 and the first inlet pipe 161 , and is used to control the flow rate of the cooling medium flowing into the first inlet pipe 161 .

[0066] Thus, the first water pump 5 can control the flow rate of the cooling medium flowing into the first inlet pipe 161, so as to control the flow rate of the cooling medium entering the first heat exchanger 141 for heating, thereby adjusting the heat exchange amount, and cooperate with the second diverter valve 4 to adjust the flow rate of the cooling medium for rapid warm-up of the engine 21, thereby improving the energy utilization rate while the engine 21 is rapidly warmed up.

[0067] It is understandable that the cooling medium may be, but is not limited to, cold water, or may be ethylene glycol antifreeze, and may be selected according to actual needs and is not limited here.

[0068] In some embodiments, the thermal management system 200 also includes a second water pump 6, two ends of the second water pump 6 are respectively connected to two ends of the engine heating pipe 211 to form a loop, the second water pump 6 is also connected between the engine heating pipe 211 and the first diverter valve 3, the second water pump 6 is also connected between the engine heating pipe 211, the battery heating pipe 221 and the heater core heating pipe 231, and the second water pump 6 is used to control the flow rate of the cooling medium flowing into the engine heating pipe 211.

[0069] Thus, the second water pump 6 can control the flow rate of the cooling medium flowing into the engine heating pipe 211 to adjust the flow rate of the cooling medium for quickly warming up the engine 21, thereby improving the energy utilization rate while quickly warming up the engine 21.

[0070] In some embodiments, the thermal management system 200 further includes a detector, the detector including a first detector and a second detector, the first detector is disposed in the intake pipe 11, the first detector is used to detect the exhaust temperature, the second detector is disposed in the engine heating pipe 211, the second detector is used to detect the cooling medium temperature in the engine heating pipe 211;

[0071] The thermal management system 200 further includes a controller 7, which is used to control the opening / closing of the first diverter valve 3 and / or the second diverter valve 4 according to the detected exhaust gas temperature and cooling medium temperature to control the flow direction of the cooling medium.

[0072] Thus, the controller 7 can control the first diverter valve 3 and / or the second diverter valve 4 under different working conditions according to the exhaust temperature of the automobile 100 detected by the detector and the temperature of the cooling medium in the engine 21, so that the heated cooling medium flows into different circuits to play a corresponding role, thereby improving the utilization rate of the heat recovered by the heat exchanger 14 and making the thermal management system 200 more intelligent.

[0073] In some embodiments, the user inputs operation instructions through the input module 300, and the input module 300 outputs the operation instructions to the controller 7 in the form of signals. The controller 7 generates corresponding control instructions based on the operation signals to control the thermal management system 200 to meet the actual needs of the user.

[0074] In some embodiments, the thermal management system 200 further includes a thermostat 8, which is disposed in the engine heating pipe 211. The thermostat 8 includes a first valve 81 and a second valve 82, wherein the first valve 81 is disposed between the engine heating pipe 211 and the first inlet pipe 161, and the second valve 82 is disposed between the two ends of the engine heating pipe 211; the controller 7 is also used to control the opening / closing of the first valve 81 and / or the second valve 82. The controller 7 can also control the flow rate of the cooling medium flowing out of the engine heating pipe 211 by simultaneously controlling the first valve 81 and the second valve 82.

[0075] Thus, the thermostat 8 is controlled by the controller 7 to open / close the first valve 81 and the second valve 82, so as to control the flow direction of the cooling medium, so as to enable the engine 21 to achieve optimal performance under different conditions, reduce energy consumption, and improve energy utilization while saving energy and reducing emissions.

[0076] When the engine 21 is cold-started under low temperature conditions, if the exhaust temperature is greater than the first set value and less than the second set value, and the cooling medium temperature detected by the second detector is less than the third set value, the controller 7 opens the first valve 81 to allow the cooling medium to enter the first heat exchanger 141 through the first water pump 5 for heating; the controller 7 is also used to open the first end 31 and the second end 32 and close the third end 33 to allow the heated cooling medium to flow back into the engine heating pipe 211.

[0077] When the exhaust temperature is greater than the first set value and less than the second set value, the minimum temperature of heat exchange is met, and less heat can be dissipated when the cooling medium enters the first heat exchanger 141. Moreover, the cooling medium temperature is less than the third set value, which indicates that the engine 21 is still in a warm-up state. Therefore, the controller 7 needs to control the second diverter valve 4 to adjust the flow rate of the heated cooling medium flowing back to the engine heating pipe 211. The controller 7 opens the first valve 81 to allow the cooling medium to flow through the first water pump 5, the first heat exchanger 141, the first end 31, the second end 32 and the second water pump 6 to the engine heating pipe 211, thereby using the heat obtained by heat exchange to heat and warm up the engine 21.

[0078] At this time, even if there are other heating requirements, the thermal management system 200 still gives priority to warming up the engine 21 and will not heat other devices 2 to be heated at the same time.

[0079] When the temperature of the cooling medium is greater than the third set value and less than the fourth set value, the engine 21 has completed warming up and there is no other heating demand, the controller 7 can close the first valve 81 and open the second valve 82 to allow the cooling medium to enter a small circulation, thereby preventing the cooling medium in the engine heating pipe 211 that has completed warming up from being heated again and causing its temperature to be too high, thereby preventing the engine 21 from having an excessively high temperature that affects the performance of the engine 21.

[0080] It is understandable that when the cooling medium temperature is greater than the third set value, the engine 21 has completed warming up, which can be set according to the actual situation of the automobile 100 and is not set here.

[0081] In some embodiments, the detector further includes a third detector, which is installed in the battery heating tube 221 and is used to detect the temperature of the battery 22. In low temperature conditions, the user can turn on the air conditioner to heat the battery 22 as needed, and when the temperature of the battery 22 is too low, the power and discharge power of the battery 22 will be limited. Therefore, the controller 7 needs to control the opening / closing of the first diverter valve 3 and the second diverter valve 4 according to the air conditioning heating instruction and the battery temperature detected in real time by the third detector, so as to heat the heater core 23 and the battery 22 according to actual needs.

[0082] When the engine 21 has completed warming up, the cooling medium temperature is greater than the third set value and less than the fourth set value. At this time, the exhaust temperature is generally greater than the second set value. The controller 7 opens the first valve 81 and closes the second valve 82 according to the air-conditioning heating instruction and the battery temperature so that the cooling medium enters the first heat exchanger 141 through the first water pump 5 for heating. At the same time, the controller 7 opens the first end 31, the third end 33 and the fourth end 41, so that the cooling medium enters the second heat exchanger 142 for heating again. The controller 7 controls the opening / closing of the fifth end 42 and the sixth end 43 so that the heated cooling medium heats the heater core 23 and / or the battery 22.

[0083] When the controller 7 receives the air conditioning heating command, the controller 7 opens the sixth end 43 to heat the heater core 23. When the battery temperature is lower than the battery temperature setting value, the controller 7 opens the fifth end 42 to heat the battery 22. When the controller 7 receives the air conditioning heating command and the battery temperature is lower than the battery temperature setting value, the controller 7 simultaneously opens the fifth end 42 and the sixth end 43 to heat the heater core 23 and the battery 22, and balances the heating amount and heating heat of the battery 22 by controlling the fifth end 42 and / or the sixth end 43 to control the heat exchange amount flowing into the battery 22 and / or the heater core 23.

[0084] In other embodiments, the air conditioner uses PTC (heater) for heating.

[0085] After parking the vehicle under low temperature conditions, if the user needs to charge the battery 22, it is necessary to send a battery charging instruction to the controller 7 through the input module 300. At the same time, if the exhaust temperature is greater than the second set value and the water temperature of the engine 21 is greater than the third set value and less than the fourth set value, the controller 7 controls the opening / closing of the thermostat 8, the first diverter valve 3 and the second diverter valve 4 according to the battery charging instruction and the temperature of the battery 22 to determine whether to heat the battery 22.

[0086] When the controller 7 receives the battery charging instruction and the battery temperature is not lower than the battery temperature setting value, the controller 7 closes the first valve 81 and opens the second valve 82 to allow the cooling medium to enter the small circulation, and the battery 22 will not be heated at this time. When the controller 7 receives the battery charging instruction and the battery temperature is lower than the battery temperature setting value, the controller 7 opens the first valve 81 and closes the second valve 82 to allow the cooling medium to enter the heat exchange circuit. The cooling medium is heated by the waste heat after the engine 21 is shut down and the waste heat of the waste heat recovery device 1. At the same time, the controller 7 opens the first end 31, the third end 33, the fourth end 41 and the fifth end 42 to allow the heated cooling medium to flow into the battery heating tube 221 to heat the battery 22.

[0087] At this time, the thermal management system 200 gives priority to heating the battery 22 to increase the battery temperature to ensure its power and discharge power. If there are other heating requirements, the battery 22 is still given priority to heat to control the waste heat recovery device 1 to recover the maximum heat for heating the battery 22, so that the battery temperature reaches the battery temperature setting value in a short time. After the battery temperature reaches the battery temperature setting value, the controller 7 controls the flow rate of the cooling medium at the fifth end 42 to reduce the heat exchange and maintain the temperature of the battery 22. When the cooling medium temperature is lower than the fifth setting value, the controller 7 controls the thermal management system 200 to stop waste heat recovery, that is, prohibiting the cooling medium from entering the battery heating tube 221. Since the fifth setting value is the lowest temperature value of the heat exchange of the battery 22, this operation can avoid the cooling medium from lowering the battery temperature after it is lower than the fifth setting value to affect the performance of the battery 22.

[0088] In some embodiments, the first set value is 200°C, the second set value is 500°C, the third set value is 60°C, the fourth set value is 85°C, and the fifth set value is 40°C.

[0089] It can be understood that the first set value, the second set value, the third set value, the fourth set value and the fifth set value are not limited to the above temperature values. The battery temperature setting value can be but is not limited to 15°C. The specific value needs to be set according to the actual situation of the automobile 100. The different automobiles or different system platforms will cause differences and changes in the above setting values, which are not limited here.

[0090] Thus, the thermal management system 200 can maximize the use of the exhaust waste heat of the engine 21 under various working conditions and utilize the exhaust waste heat in various scenarios to heat auxiliary equipment to reduce other energy consumption.

[0091] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A waste heat recovery device, characterized in that: include: Intake pipe; Exhaust pipe; An exhaust pipe, one end of which is connected to the air inlet pipe, the other end of which is connected to the air outlet pipe, and an exhaust cavity is provided in the exhaust pipe; At least one heat exchanger, each of the heat exchangers includes a coil and an inlet pipe and an outlet pipe, wherein the coil is a variable curvature spiral tube and is accommodated in the exhaust chamber, the inlet pipe and the outlet pipe are respectively connected to the opposite ends of the coil, the inlet pipe is used to introduce a cooling medium into the coil, and the outlet pipe is used to outlet the cooling medium from the coil, so as to recover the heat in the exhaust chamber by absorbing the heat in the exhaust chamber through the cooling medium.

2. The waste heat recovery device according to claim 1, characterized in that: The at least one heat exchanger includes a first heat exchanger and a second heat exchanger, and the first heat exchanger and the second heat exchanger are arranged side by side along the direction of the exhaust pipe from the intake pipe to the outlet pipe.

3. The waste heat recovery device according to claim 1, characterized in that: The inner diameter of the exhaust pipe is larger than the inner diameters of the air inlet pipe and the air outlet pipe, and the curvature diameter of the ends of the coil close to the air inlet pipe and the air outlet pipe is smaller than or equal to the inner diameters of the air inlet pipe and the air outlet pipe.

4. The waste heat recovery device according to claim 2, characterized in that: The first heat exchanger includes a first coil, a first inlet pipe and a first outlet pipe. The first coil is a variable curvature spiral tube. The first inlet pipe passes through the tube wall of the exhaust pipe to the exhaust cavity to connect to an end of the first coil close to the intake pipe. The first outlet pipe passes through the tube wall of the exhaust pipe to the exhaust cavity to connect to an end of the first coil away from the intake pipe.

5. The waste heat recovery device according to claim 2, characterized in that: The second heat exchanger includes a second coil, a second inlet pipe and a second outlet pipe. The second coil is a variable curvature spiral tube. The second inlet pipe passes through the tube wall of the exhaust pipe to the exhaust cavity to connect to an end of the second coil away from the outlet pipe. The second outlet pipe passes through the tube wall of the exhaust pipe to the exhaust cavity to connect to an end of the second coil close to the outlet pipe.

6. A thermal management system, characterized in that: include: Equipment to be heated; The waste heat recovery device according to any one of claims 1 to 5, wherein the waste heat recovery device is connected to the equipment to be heated, and the waste heat recovery device is used to recover the heat of the exhaust gas, and the recovered heat is used to heat the equipment to be heated.

7. The thermal management system according to claim 6, characterized in that: The device to be heated includes at least one of an engine, a battery and a heater core, and the outlet pipe of the heat exchanger is connected to the device to be heated.

8. The thermal management system according to claim 7, characterized in that: The thermal management system also includes a first diverter valve, the equipment to be heated includes an engine, a battery and a heater core, the thermal management system includes a battery heating pipe, a heater core heating pipe and an engine heating pipe, one end of the first diverter valve is connected to the outlet pipe, and the other end is respectively connected to one end of the battery heating pipe and the heater core heating pipe, the other end of the battery heating pipe and the other end of the heater core heating pipe are both connected to one end of the engine heating pipe, wherein the battery heating pipe is arranged in the battery, the heater core heating pipe is arranged in the heater core, and the engine heating pipe is arranged in the engine.

9. The thermal management system according to claim 8, characterized in that: The heat exchanger includes a first heat exchanger and a second heat exchanger, the first outlet pipe of the first heat exchanger is connected to the second inlet pipe of the second heat exchanger, the first inlet pipe of the first heat exchanger is connected to the engine heating pipe, the second outlet pipe of the second heat exchanger is connected to the first diverter valve, the thermal management system also includes a second diverter valve, the second diverter valve is connected between the first outlet pipe and the second inlet pipe, and the second diverter valve is also connected to the engine heating pipe.

10. The thermal management system according to claim 9, characterized in that: The thermal management system further includes a first water pump connected between the engine heating pipe and the first introduction pipe, and the first water pump is used to control the flow rate of the cooling medium flowing into the first introduction pipe.

11. The thermal management system according to claim 9, characterized in that: The thermal management system also includes a second water pump, two ends of which are respectively connected to the two ends of the engine heating pipe to form a loop, the second water pump is also connected between the engine heating pipe and the first diverter valve, the second water pump is also connected between the engine heating pipe, the battery heating pipe and the heater core heating pipe, and the second water pump is used to control the flow rate of the coolant flowing into the engine heating pipe.

12. The thermal management system according to claim 9, characterized in that: The thermal management system further includes a detector, the detector including a first detector and a second detector, the first detector is arranged in the intake pipe, the first detector is used to detect the exhaust temperature, the second detector is arranged in the engine heating pipe, the second detector is used to detect the cooling medium temperature in the engine heating pipe; The thermal management system further includes a controller for controlling the opening / closing of the first diverter valve and / or the second diverter valve according to the detected exhaust gas temperature and cooling medium temperature to control the flow direction of the cooling medium.

13. The thermal management system according to claim 12, characterized in that: The thermal management system also includes a thermostat, which is arranged in the engine heating pipe. The thermostat includes a first valve and a second valve. The first valve is arranged between the engine heating pipe and the first inlet pipe, and the second valve is arranged between the two ends of the engine heating pipe. The controller is also used to control the opening / closing of the first valve and / or the second valve.

14. A car, characterized in that: include: A thermal management system as claimed in any one of claims 6 to 13; An input module, the input module is used to input user operation instructions to control the thermal management system; wherein the operation instructions include at least one of air conditioning heating instructions, engine heating instructions, and battery charging instructions.

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