Seat collaborative heating system based on EGR waste heat and vehicle

Abstract

The utility model relates to a kind of seat collaborative heating system and vehicle based on EGR waste heat, including heat source module, heat transfer and distribution module and heat utilization module;The heat source module includes range extending engine, EGR cooler and EGR-low temperature liquid heat exchanger, the exhaust inlet of the EGR-low temperature liquid heat exchanger is connected range extending engine outlet by EGR cooler, exhaust outlet is connected range extending engine inlet by intake manifold, cooling liquid outlet is connected heat utilization module water inlet by heat transfer and distribution module, and heat utilization module water outlet connects EGR-low temperature liquid heat exchanger cooling liquid inlet;The heat utilization module includes liquid warm seat heating pad installed on seat.The utility model recovers the waste heat not being utilized in range extending engine EGR exhaust gas by EGR-low temperature liquid heat exchanger, uses liquid warm seat heating pad to replace traditional pure electric heating seat, significantly reduces automobile electric energy consumption, and improves pure electric cruising range.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a seat co-heating system and vehicle based on EGR waste heat. Background Technology

[0002] In automotive seat heating, the current mainstream solutions mainly rely on electrothermal technologies such as carbon fiber heating, metal resistance wire heating, or graphene heating. Their working principle is to control the current of the heating element through switches or relays, and to achieve overheat protection and stepless temperature regulation with the help of PTC elements. However, the above heating methods have revealed many insurmountable defects in actual use: On the one hand, the heat transfer of electric heating elements relies on local heating and diffusion to the surrounding area, resulting in uneven temperature distribution on the seat surface. This easily leads to a temperature gradient difference between local overheating and insufficient edge temperature. At the same time, the electric heating process quickly removes moisture from the seat surface, causing a noticeable dryness to the occupants and seriously affecting seating comfort. On the other hand, traditional electric seat heating generally consumes a lot of power, especially during long-term use in low-temperature winter environments, which significantly increases the vehicle's energy consumption. For new energy vehicles, this will directly lead to a reduction in pure electric range, which contradicts the industry's development needs for energy conservation and emission reduction.

[0003] Therefore, there is an urgent need for a technical solution that can balance seat heating comfort, low energy consumption, and make full use of the waste heat from the vehicle's existing powertrain. Utility Model Content This utility model addresses the technical problems existing in the prior art by providing a seat co-heating system and vehicle based on EGR waste heat.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A seat co-heating system based on EGR waste heat includes a heat source module, a heat transfer and distribution module, and a heat utilization module. The heat source module includes a range extender engine, an EGR cooler, and an EGR-cryogenic liquid heat exchanger. The exhaust gas inlet of the EGR-cryogenic liquid heat exchanger is connected to the range extender engine outlet through the EGR cooler, and the exhaust gas outlet is connected to the range extender engine inlet through an intake manifold. The coolant outlet is connected to the heat utilization module inlet through the heat transfer and distribution module, and the heat utilization module outlet is connected to the EGR-cryogenic liquid heat exchanger coolant inlet. The heat utilization module includes a liquid-heated seat heating pad installed on the seat.

[0005] The beneficial effects of this utility model are: 1. By recovering the unused waste heat in the EGR exhaust gas of the range extender engine through the EGR-low temperature liquid heat exchanger, and replacing the traditional pure electric heated seat with a liquid-heated seat heating pad, the vehicle's electric energy consumption is significantly reduced and the pure electric driving range is increased. 2. The liquid-warm type seat heating pad transfers heat through coolant circulation. Compared with traditional electric heating wire or carbon fiber heating, the seat surface temperature is more uniform, avoiding local overheating and dryness, and greatly improving riding comfort; 3. The waste heat recovery process reduces the emission temperature of EGR exhaust gas, lowers the thermal load of the engine intake manifold, accelerates engine warm-up at the same time, and reduces friction loss and exhaust emissions during the cold start phase; 4. The system has a compact structure, is modified based on the existing vehicle EGR system, no additional independent heat source is required, which reduces the whole vehicle manufacturing cost and assembly complexity.

[0006] Further, the heat source module further includes an EGR valve, which is arranged between the EGR low-temperature liquid heat exchanger and the intake manifold. The EGR valve can precisely adjust the amount of exhaust gas recirculation.

[0007] Further, the outlet of the range-extending engine is further connected to an exhaust pipe through an exhaust manifold, and the range-extending engine is connected with a high-temperature radiator. The split design of the exhaust manifold allows the exhaust gas not participating in waste heat recovery to be discharged normally through the exhaust pipe; the high-temperature radiator matched with the range-extending engine can independently control the temperature of the engine body, preventing the engine from overheating caused by EGR waste heat recovery.

[0008] Further, a three-way catalytic converter is arranged between the exhaust manifold and the exhaust pipe. The three-way catalytic converter can convert pollutants such as carbon monoxide, hydrocarbons, and nitrogen oxides in the exhaust gas discharged from the exhaust manifold into harmless gases, reducing the exhaust emissions of the whole vehicle.

[0009] Further, the heat utilization module further includes a heater core arranged in the passenger compartment. The heater core and the seat heating pad share the EGR waste heat heat source, realizing the coordinated energy distribution of seat heating and passenger compartment heating. When the seat heating demand is met, the excess waste heat can be directed to the heater core to avoid waste heat waste.

[0010] Further, a liquid heating channel is arranged inside the seat heating pad, and backup electric heating components are evenly distributed on the outer side of the liquid heating channel. The composite structure of the liquid heating channel and the backup electric heating component realizes coordinated heating with waste heat as the main part and electric heating as the auxiliary part. When the EGR waste heat is sufficient, heating relies on the liquid heating channel, and when it is insufficient, the electric heating component is started for supplementation, ensuring that the seat temperature quickly reaches the target value.

[0011] Further, the electric heating component includes a PTC heating wire. The PTC heating wire has the characteristics of fast temperature rise and high temperature control accuracy, and can quickly respond to the heat supplement demand as a backup electric heating component.

[0012] Furthermore, the heat transfer and distribution module includes a three-way control valve located between the EGR-low temperature liquid heat exchanger and the seat heating pad and heater core. The three-way control valve can flexibly adjust the flow rate of coolant to the seat heating pad and heater core to meet the needs of various scenarios.

[0013] Furthermore, the heat transfer and distribution module also includes a water pump. The water pump's inlet is connected to both the seat heating pad and the heater core, while its outlet is connected to the coolant inlet of the EGR-low temperature liquid heat exchanger. The water pump provides power for the coolant circulation, ensuring that the hot coolant flows quickly and stably to the seat heating pad and the heater core, thereby improving heat transfer efficiency.

[0014] A vehicle includes the aforementioned EGR waste heat-based seat co-heating system. When a vehicle is equipped with the aforementioned EGR waste heat-based seat co-heating system, it can significantly reduce the energy consumption for seat heating and passenger compartment heating while improving vehicle comfort in winter. Attached Figure Description

[0015] Figure 1 This is a structural block diagram of an embodiment of the present utility model; The attached diagram lists the components represented by each number as follows: 1. Range extender engine; 2. EGR cooler; 3. EGR cryogenic liquid heat exchanger; 4. EGR valve; 5. Intake manifold; 6. Exhaust manifold; 7. Three-way catalytic converter; 8. Exhaust pipe; 9. Seat heating pad; 10. Heater core; 11. Three-way control valve; 12. Water pump; 13. High-temperature radiator. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0018] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0019] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0020] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0021] Example like Figure 1As shown, this embodiment provides a seat co-heating system based on EGR waste heat, including a heat source module, a heat transfer and distribution module, and a heat utilization module. The heat source module includes a range extender engine 1, an EGR cooler 2, and an EGR-cryogenic liquid heat exchanger 3. The exhaust gas inlet of the EGR-cryogenic liquid heat exchanger 3 is connected to the outlet of the range extender engine 1 through the EGR cooler 2, and the exhaust gas outlet is connected to the inlet of the range extender engine 1 through the intake manifold 5. The coolant outlet is connected to the inlet of the heat utilization module through the heat transfer and distribution module, and the outlet of the heat utilization module is connected to the coolant inlet of the EGR-cryogenic liquid heat exchanger 3. The heat utilization module includes a liquid-heated seat heating pad 9 installed on the seat. This embodiment aims to replace the traditional pure electric heated seat with a liquid-heated seat heating pad 9. The unused waste heat of 150-300℃ in the EGR exhaust gas of the range extender engine 1 is recovered through the EGR-low temperature liquid heat exchanger 3. The heat is transferred by the circulation of coolant, which reduces the car's electric energy consumption, increases the pure electric range, and makes the seat surface temperature more uniform, avoiding local overheating and dryness, and improving the riding comfort.

[0022] Specifically: The heat source module also includes an EGR valve 4, located between the EGR-low temperature liquid heat exchanger 3 and the intake manifold 5. The EGR valve 4 can precisely adjust the amount of exhaust gas recirculation.

[0023] The range extender engine 1 is also connected to the exhaust pipe 8 via the exhaust manifold 6. The range extender engine 1 is connected to a high-temperature radiator (HTR) 13. The exhaust manifold 6 is designed to allow exhaust gases that do not participate in waste heat recovery to be discharged normally through the exhaust pipe 8. The high-temperature radiator 13 of the range extender engine 1 can independently control the engine body temperature, avoiding engine overheating due to EGR waste heat recovery. The split structure enables independent operation of waste heat recovery and normal exhaust, without interference, ensuring the energy supply for seat heating without affecting the engine's performance.

[0024] A three-way catalytic converter 7 is installed between the exhaust manifold 6 and the exhaust pipe 8. The three-way catalytic converter 7 can convert pollutants such as carbon monoxide, hydrocarbons, and nitrogen oxides in the exhaust gas discharged from the exhaust manifold 6 into harmless gases, reducing the overall vehicle exhaust emissions. The three-way catalytic converter 7 works synergistically with the emission control function of the EGR system, reducing nitrogen oxide generation through EGR cycle and purifying the remaining exhaust gas through the three-way catalytic converter 7, achieving the dual environmental protection effect of source emission reduction and end-of-pipe purification.

[0025] The heat utilization module also includes a warm air core 10 located in the passenger compartment. The warm air core 10 and the seat heating pad 9 share the EGR waste heat source to achieve coordinated energy distribution for seat heating and passenger compartment heating. When the seat heating demand is met, excess waste heat can be directed to the warm air core 10 to avoid waste heat.

[0026] The seat heating pad 9 has a liquid heating channel inside, and backup electric heating components are evenly distributed on the outside of the liquid heating channel. The composite structure of the liquid heating channel and the backup electric heating components achieves coordinated heating with waste heat as the main source and electric heating as the auxiliary source. When the EGR waste heat is sufficient, it relies on the liquid heating channel for heating; when it is insufficient, the electric heating components are activated to supplement it, ensuring that the seat temperature quickly reaches the target value. The backup electric heating components are evenly distributed on the outside of the liquid heating channel, which can quickly compensate for local temperature differences, further improving the uniformity of seat heating, while avoiding temperature fluctuations when the waste heat is insufficient due to the single liquid heating. At the same time, the two heating structures are independent of each other, which facilitates maintenance and repair. If one structure fails, the other can be temporarily replaced, improving the reliability of system operation.

[0027] The heating element includes a PTC heating wire. The PTC heating wire features rapid heating and high temperature control accuracy, and can quickly respond to heat replenishment needs as a backup heating element.

[0028] The heat transfer and distribution module includes a three-way control valve 11, located between the EGR-low-temperature liquid heat exchanger 3 and the seat heating pad 9 and heater core 10. Specifically, the inlet of the three-way control valve 11 is connected to the coolant outlet of the EGR-low-temperature liquid heat exchanger 3, the first outlet is connected to the liquid inlet of the seat heating pad 9, and the second outlet is connected to the liquid inlet of the heater core 10. The three-way control valve 11 can flexibly adjust the flow ratio of coolant to the seat heating pad 9 and the heater core 10, meeting the needs of multiple scenarios such as seat heating only, passenger compartment heating only, and simultaneous heating of both. Moreover, compared with independent pipeline control, the three-way control valve 11 simplifies the heat distribution structure, reduces pipeline connection nodes, reduces the risk of coolant leakage, and reduces the complexity and cost of vehicle assembly.

[0029] The heat transfer and distribution module also includes a water pump 12. The inlet of the water pump 12 is connected to the seat heating pad 9 and the heater core 10, respectively, and the outlet is connected to the coolant inlet of the EGR-low temperature liquid heat exchanger 3. The water pump 12 provides power for the coolant circulation, ensuring that the hot coolant flows quickly and stably to the seat heating pad 9 and the heater core 10, thereby improving heat transfer efficiency. The water pump 12 can dynamically adjust its speed according to the coolant temperature and heating demand. When there is sufficient waste heat, the speed is increased to increase the flow rate, and when the temperature reaches the target, the speed is reduced to reduce energy consumption, thus achieving on-demand energy supply.

[0030] In addition, this embodiment also provides a vehicle including the seat co-heating system based on EGR waste heat as described above, as detailed in the above embodiment, and will not be repeated here.

[0031] The working principle of the above structure: The seat heating system in this embodiment can be used in conjunction with the vehicle's control and monitoring systems. Specifically: 1. Phase One: EGR Exhaust Gas Waste Heat Collection When the range extender engine 1 is working, the high-temperature exhaust gas (temperature 500-700℃) generated by engine combustion is divided into two branches: one branch flows through the exhaust manifold 6 to the three-way catalytic converter 7, and is discharged through the exhaust pipe 8 after purification; the other branch serves as a waste heat recovery source and enters the EGR cooler 2 through the EGR valve 4. EGR cooler 2 first cools the high-temperature exhaust gas (using the engine's high-temperature coolant) to prevent the exhaust gas temperature from being too high and damaging subsequent components. The cooled exhaust gas still maintains a high heat state of 150-300℃ before entering the EGR cryogenic liquid heat exchanger. Inside the EGR-low temperature liquid heat exchanger 3, the high temperature exhaust gas exchanges heat with the flowing low temperature coolant. After the exhaust gas is cooled to near the coolant temperature, it flows back to the inlet of the range extender engine 1 through the intake manifold 5 and re-participates in combustion, thus realizing exhaust gas recirculation and emission control. 2. Phase Two: Heat Transfer and Distribution The high-temperature coolant, which has absorbed the waste heat of EGR, flows along the low-temperature cooling circulation pipeline to the three-way control valve 11 under the power of the water pump 12. The three-way control valve 11 dynamically adjusts the flow direction and flow rate ratio of the coolant according to system requirements (the driver's set seat heating level and the passenger compartment heating requirements), forming two distribution paths: Path 1 (seat heating): Coolant flows to the liquid heating channel of the liquid-heated seat heating pad 9 to provide a heat source for seat heating; Path 2 (Cruise compartment heating): Coolant flows to the warm air core 10 in the air conditioning duct of the crew compartment to heat the cold air blown out by the air conditioning blower. 3. Phase Three: Heat Utilization and Co-heating When the driver activates the seat heating function, the three-way control valve 11 opens the passage to the seat heating pad 9. Hot coolant flows through the liquid-heated seat heating pad 9, continuously and evenly transferring heat to the seat surface to achieve the heating function. Temperature sensors installed at corresponding locations on the seat can monitor the seat surface temperature and coolant temperature in real time. When the EGR waste heat is sufficient (coolant temperature ≥ seat target temperature), the backup electric heating component (PTC heating wire) is completely shut off, achieving zero-power heating. When the range extender engine 1 stops or the waste heat is insufficient (coolant temperature < seat target temperature), the PTC heating wire is activated to quickly replenish heat and ensure that the seat temperature remains stable within the target range. When the driver turns on the air conditioning heating function, the high-temperature coolant flowing through the heating core 10 exchanges heat with the cold air, and the heated air is blown into the passenger compartment through the air conditioning outlet to provide heating. 4. Phase Four: Closed-Loop Cycle and Control Regulation The coolant that has completed heat transfer (temperature dropped to 20-30℃) flows back to the coolant inlet of the EGR-Cryogenic Liquid Heat Exchanger 3 through the low-temperature cooling circulation pipeline, reabsorbs the waste heat of the exhaust gas, and forms a closed loop of heating-heat release-reheating to ensure continuous utilization of heat.

[0032] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A seat co-heating system based on EGR waste heat, characterized in that, It includes a heat source module, a heat transfer and distribution module, and a heat utilization module; The heat source module includes a range extender engine, an EGR cooler, and an EGR-cryogenic liquid heat exchanger. The exhaust gas inlet of the EGR-cryogenic liquid heat exchanger is connected to the range extender engine outlet through the EGR cooler. The exhaust gas outlet is connected to the range extender engine inlet through the intake manifold. The coolant outlet is connected to the heat utilization module inlet through the heat transfer and distribution module. The heat utilization module outlet is connected to the EGR-cryogenic liquid heat exchanger coolant inlet. The heat utilization module includes a liquid-heated seat heating pad installed on the seat.

2. The seat co-heating system based on EGR waste heat according to claim 1, characterized in that, The heat source module also includes an EGR valve, located between the EGR-cryogenic liquid heat exchanger and the intake manifold.

3. The seat co-heating system based on EGR waste heat according to claim 1, characterized in that, The range extender engine outlet is also connected to the exhaust pipe via an exhaust manifold, and the range extender engine is connected to a high-temperature radiator.

4. A seat co-heating system based on EGR waste heat according to claim 3, characterized in that, A three-way catalytic converter is installed between the exhaust manifold and the exhaust pipe.

5. A seat co-heating system based on EGR waste heat according to claim 1, characterized in that, The heat utilization module also includes a heating core located in the crew compartment.

6. A seat co-heating system based on EGR waste heat according to claim 1, characterized in that, The seat heating pad has a liquid heating channel inside, and spare electric heating components are evenly distributed on the outside of the liquid heating channel.

7. A seat co-heating system based on EGR waste heat according to claim 6, characterized in that, The heating element includes a PTC heating wire.

8. A seat co-heating system based on EGR waste heat according to claim 1, characterized in that, The heat transfer and distribution module includes a three-way control valve located between the EGR-low temperature liquid heat exchanger and the seat heating pad and warm air core.

9. A seat co-heating system based on EGR waste heat according to claim 1, characterized in that, The heat transfer and distribution module also includes a water pump, the water pump's inlet is connected to the seat heating pad and the heater core respectively, and the water outlet is connected to the EGR-low temperature liquid heat exchanger coolant inlet.

10. A vehicle, characterized in that, Includes the seat co-heating system based on EGR waste heat as described in any one of claims 1-9.

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