Automobile exhaust waste heat recycling system

Abstract

The invention discloses an automobile exhaust waste heat recycling system which comprises an engine water jacket and a main water pump which are connected, and further comprises a waste heat exchanger, an electronic water pump, an engine end electromagnetic valve and a one-way valve, a waste gas channel and a cooling water way channel are integrally arranged in the waste heat exchanger, and the waste gas channel is connected with an exhaust system of an engine; one end of the cooling water channel is connected with an automobile cooling water channel through an electronic water pump, and the other end of the cooling water channel is connected with the water outlet end of an engine water jacket through a one-way valve and an engine end electromagnetic valve. The heat source of the whole vehicle is transferred to the exhaust end, a laminar flow heat exchange structure is designed, heat exchange is achieved through gas-liquid cross stacking, energy of high-temperature waste gas which is wasted all the time and even harmful to the whole vehicle is effectively utilized, the comprehensive efficiency of a system is improved, meanwhile, an original front silencer can be directly replaced, redundant space of the whole vehicle is not occupied, and the cost is reduced. And therefore, the high adaptability of the whole vehicle is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile exhaust waste heat recycling, and in particular to an automobile exhaust waste heat recycling system. Background Art

[0002] With the rapid development of new energy vehicles, the thermal management requirements for the whole vehicle are getting higher and higher, and the system complexity is constantly increasing. Compared with traditional fuel vehicles, the insulation of the battery pack and the system design under the pure electric mode have been added, which has led to increased vehicle costs and later development pressure. As the market competition becomes increasingly fierce, continuous optimization of the thermal management system and simplification of system design are important topics in the later stage, and are also one of the key factors for vehicle manufacturers to cope with the new energy trend and maintain their own technological advantages and product competitiveness.

[0003] For example, Chinese patent CN107023364B discloses a method and system for exhaust heat recovery, in which the exhaust gas can flow in two directions through an exhaust bypass channel and a heat exchanger coupled to the bypass channel, and the EGR can be transported from the exhaust channel to the engine intake manifold, and the heat from the exhaust gas can be recovered at the heat exchanger. This system integrates the EGR exhaust gas circulation, and cannot take into account both the cabin heating and EGR functions in winter, and the waste heat utilization rate is not high. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a system for recycling waste heat from automobile exhaust to achieve the purpose of effectively improving the utilization rate of waste heat.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The automobile exhaust waste heat recycling system includes a connected engine water jacket and a main water pump, a waste heat exchanger, an electronic water pump, an engine-end solenoid valve, and a one-way valve. The waste heat exchanger is integrated with an exhaust gas channel and a cooling water channel. The exhaust gas channel is connected to the exhaust system of the engine. One end of the cooling water channel is connected to the automobile cooling water channel through the electronic water pump, and the other end of the cooling water channel is connected to the water outlet of the engine water jacket through the one-way valve and the engine-end solenoid valve.

[0007] Further:

[0008] It also includes a battery heat exchange system for thermal management of the battery pack. The water outlet end of the waste heat exchanger is connected to the heater core through a tee to form a branch system. A high-temperature exchanger is arranged between the branch system and the battery heat exchange system.

[0009] A thermostat is arranged at the water outlet end of the engine water jacket.

[0010] The battery heat exchange system is provided with an expansion pot and a battery water pump.

[0011] The battery heat exchange system is provided with a low temperature exchanger.

[0012] An in-cabin heat exchanger is arranged in the passenger cabin of the automobile, and the water outlet end of the waste heat exchanger is connected with the in-cabin heat exchanger through an electromagnetic valve.

[0013] The exhaust heat exchange cylinder comprises a group of heat exchange baffles, adjacent heat exchange baffles are connected together, and exhaust gas channels and cooling water channels are opened on the heat exchange baffles.

[0014] The edges of the group of heat exchange baffles are connected to form an integral exhaust heat exchange cylinder structure.

[0015] The heat exchange baffles are provided with exhaust gas channel holes and cooling water channel connecting ports. The cooling water channel connecting ports on adjacent heat exchange baffles are staggered, and there are gaps between adjacent heat exchange baffles.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The automobile exhaust waste heat recycling system is reasonably designed. It transfers the heat source of the whole vehicle to the exhaust end, designs a laminar heat exchange structure, and realizes heat exchange through gas-liquid cross-layering. It effectively utilizes the energy of high-temperature exhaust gas that has been wasted or even harmful to the whole vehicle, replaces the traditional PTC heating system, and eliminates the warm air water intake at the engine thermostat end, reducing the warm-up burden of the engine in winter. While reducing the cost of the whole vehicle, it improves the energy consumption performance of the whole vehicle and improves the overall efficiency of the system. At the same time, it can directly replace the original front muffler without taking up extra space in the whole vehicle, and has a higher vehicle adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1 Schematic diagram of the system of the present invention.

[0020] Figure 2 It is a schematic diagram of the waste heat exchanger assembly of the present invention.

[0021] Figure 3 It is a schematic diagram of the explosion of the waste heat exchanger assembly of the present invention.

[0022] Figure 4 It is a schematic cross-sectional view of the waste heat exchanger of the present invention.

[0023] Figure 5 This is a schematic diagram of the heat exchange baffle structure of the present invention. DETAILED DESCRIPTION

[0024] The specific implementation modes of the present invention will be further explained in detail below through the description of embodiments with reference to the accompanying drawings.

[0025] like Figures 1 to 5 As shown, the automobile exhaust waste heat recycling system includes a low-temperature radiator 01, a high-temperature radiator 02, a temperature sensor 03, an expansion pot I 04, an electric drive water pump 05, a charger 06, an electronic control system 07, a motor oil cooler 08, a low-temperature exchanger 09, an expansion pot II 10, a battery water pump 11, a battery 12, a solenoid valve 13, a high-temperature exchanger 14, a heater core 15, a waste heat pump 16, a waste heat exchanger 17, an engine-end solenoid valve 18, a main water pump 19, an engine water jacket 20, a thermostat 21, an oil cooler 22 and an electronic fan 23.

[0026] The main water pump, engine water jacket, electronic fan and high-temperature radiator form the engine cooling system; a thermostat is provided at the water outlet of the engine water jacket. The low-temperature radiator, electric drive water pump, charger, electronic control system and motor oil cooler form the electric drive cooling system.

[0027] The waste heat exchanger is integrated with an exhaust gas channel and a cooling water channel. The exhaust gas channel is connected to the exhaust system of the engine. One end of the cooling water channel is connected to the vehicle cooling water channel through an electronic water pump, and the other end of the cooling water channel is connected to the water outlet of the engine water jacket through a one-way valve and an engine-end solenoid valve.

[0028] The present invention also includes a battery heat exchange system for thermal management of the battery pack. The water outlet end of the waste heat exchanger is connected to the warm air core through a tee to form a branch system. A high-temperature exchanger is arranged between the branch system and the battery heat exchange system.

[0029] The battery heat exchange system is provided with an expansion pot and a battery water pump; the battery heat exchange system is provided with a low temperature exchanger.

[0030] An in-cabin heat exchanger is arranged in the passenger compartment of the automobile, and a water outlet end of the waste heat exchanger is connected to the in-cabin heat exchanger through an electromagnetic valve.

[0031] The exhaust waste heat exchanger includes an exhaust heat exchange cylinder, both ends of which are provided with end covers, an exhaust gas channel 501 and a cooling water channel are provided in the exhaust heat exchange cylinder, a vent connected to the exhaust gas channel is provided on the end cover, and a connecting pipe connected to the cooling water channel is provided on the end cover.

[0032] The two end covers are respectively an inlet packaging end cover 1 and an outlet packaging end cover 2; the end cover is a conical structure, the vent is arranged at the center position of the small end of the conical structure, the connecting pipe is arranged on the conical surface of the conical structure, the connecting pipe on the inlet packaging end cover forms a circulating water circuit connecting the inlet 3, and the connecting pipe on the outlet packaging end cover forms a circulating water circuit connecting the outlet 4; the various components are integrated and the structure is compact.

[0033] The exhaust heat exchange cylinder includes a group of heat exchange baffles 5, adjacent heat exchange baffles are connected together, and exhaust gas channels and cooling water channels are opened on the heat exchange baffles; the heat exchange baffles are connected by crimping and edging, and the channel shape between the baffle chambers requires high-temperature pressure welding to ensure sealing.

[0034] The inner end of the connecting pipe extends into the end cover, and the inner end of the connecting pipe is connected to the end of the cooling water channel. Further, the heat exchange baffle is provided with an exhaust gas channel hole and a cooling water channel connecting port 502, and the inner end of the connecting pipe is connected to the cooling water channel connecting port on the end heat exchange baffle, and the structure is compact.

[0035] The exhaust gas channel holes on adjacent heat exchange baffles are directly connected to form an exhaust gas channel; there is a gap between adjacent heat exchange baffles, and the cooling water channel connecting ports on adjacent heat exchange baffles are staggered; that is, a heat exchange cavity is formed between adjacent heat exchange baffles, and the heat exchange is efficient.

[0036] The automobile exhaust waste heat recycling system of the present invention is reasonably designed, transfers the heat source of the whole vehicle to the exhaust end, designs a laminar heat exchange structure, realizes heat exchange through gas-liquid cross-stacking, and effectively utilizes the energy of high-temperature exhaust gas that has been discarded or even harmful to the whole vehicle, replaces the traditional PTC heating system, and eliminates the warm air water intake at the engine thermostat end, reduces the warm-up burden of the engine in winter, improves the energy consumption performance of the whole vehicle while reducing the cost of the whole vehicle, and improves the comprehensive efficiency of the system. At the same time, it can directly replace the original front muffler without taking up extra space in the whole vehicle, and has higher adaptability to the whole vehicle.

[0037] This patent is based on the concept of simplified system design. It will replace the original engine heater and PTC assembly, simplify the types of functional components and system complexity, and effectively control costs while ensuring the original performance. The application of the exhaust waste heat circulation system can improve the efficiency of engine warm-up in winter. At the same time, combined with the vehicle thermal management system, it can achieve higher heat utilization efficiency, and the system structure is simple, which is more conducive to later maintenance.

[0038] The above is only an explanation of the preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0039] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An automobile exhaust waste heat recycling system, comprising a connected engine water jacket and a main water pump, characterized in that: It also includes a waste heat exchanger, an electronic water pump, an engine-end solenoid valve and a one-way valve. The waste heat exchanger is integrated with an exhaust gas channel and a cooling water channel. The exhaust gas channel is connected to the exhaust system of the engine. One end of the cooling water channel is connected to the vehicle cooling water channel through an electronic water pump, and the other end of the cooling water channel is connected to the water outlet of the engine water jacket through a one-way valve and the engine-end solenoid valve.

2. The automobile exhaust waste heat recycling system as claimed in claim 1, characterized in that: It also includes a battery heat exchange system for thermal management of the battery pack. The water outlet end of the waste heat exchanger is connected to the heater core through a tee to form a branch system. A high-temperature exchanger is arranged between the branch system and the battery heat exchange system.

3. The automobile exhaust waste heat recycling system as claimed in claim 1, characterized in that: A thermostat is arranged at the water outlet end of the engine water jacket.

4. The automobile exhaust waste heat recycling system as claimed in claim 2, characterized in that: The battery heat exchange system is provided with an expansion pot and a battery water pump.

5. The automobile exhaust waste heat recycling system as claimed in claim 4, characterized in that: The battery heat exchange system is provided with a low temperature exchanger.

6. The automobile exhaust waste heat recycling system as claimed in claim 1, characterized in that: An in-cabin heat exchanger is arranged in the passenger cabin of the automobile, and the water outlet end of the waste heat exchanger is connected with the in-cabin heat exchanger through an electromagnetic valve.

7. The automobile exhaust waste heat recycling system as claimed in claim 1, characterized in that: The exhaust heat exchange cylinder comprises a group of heat exchange baffles, adjacent heat exchange baffles are connected together, and exhaust gas channels and cooling water channels are opened on the heat exchange baffles.

8. The automobile exhaust waste heat recycling system as claimed in claim 7, characterized in that: The edges of the group of heat exchange baffles are connected to form an integral exhaust heat exchange cylinder structure.

9. The automobile exhaust waste heat recycling system as claimed in claim 7, characterized in that: The heat exchange baffles are provided with exhaust gas channel holes and cooling water channel connecting ports. The cooling water channel connecting ports on adjacent heat exchange baffles are staggered, and there are gaps between adjacent heat exchange baffles.

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