Extended-range vehicle type engine waste heat recovery device

Abstract

The utility model relates to the field of automobile manufacturing, in particular to a waste heat recovery device for an extended-range vehicle type engine. Comprising a heat exchange tube, an electronic three-way water valve, a heat exchange bottom plate, a heat exchange layer plate and a heat exchange top plate, the heat exchange bottom plate, the heat exchange layer plate and the heat exchange top plate are buckled to form a cavity, heat exchange pipe penetrating holes are formed in the same side, and heat exchange pipes penetrate through the penetrating holes to form a loop. An engine hot water inlet is formed in the other side of the heat exchange bottom plate, an engine hot water outlet is formed in the other side of the heat exchange top plate, a heat exchange pipe is erected in the heat exchange layer plate, and a warm air blower cold water inlet and a warm air blower cold water outlet are formed in the two ends of the heat exchange pipe respectively. The heat exchange top plate is provided with a through hole of a cold water outlet of the fan heater; a short circuit pipeline and an electronic water passing valve are arranged between the warm air blower cold water inlet and the warm air blower cold water outlet. According to the utility model, the waste heat of the engine is transmitted to the warm air loop, the heating time of the PTC automobile heater is reduced, and the energy-saving effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing, specifically to a waste heat recovery device for a range-extended vehicle engine. Background Technology

[0002] Range-extended electric vehicles (REEVs) are electric vehicles that can achieve all their power performance in pure electric mode. When the onboard rechargeable energy storage system cannot meet the range requirements, the onboard auxiliary power supply device is activated to provide power to the power system, thereby extending the driving range. When the engine is used as an auxiliary power supply device, existing technologies often have the following drawbacks: 1. Engine waste heat is not recovered and must be entirely heated by the PTC car heater, resulting in energy waste; 2. The heat exchange efficiency of engine waste heat utilization is low or insufficient; 3. The engine circuit system has high pressure and temperature, and if directly connected to other electrical component circuits, it can easily damage other components, reducing system reliability; 4. The heater circuit and water-to-water heat exchanger lack a switching or short-circuiting device, and when the engine temperature is low and the PTC car heater is working, heat from the heater circuit can easily be transferred to the engine, resulting in energy waste; 5. The battery pack cannot utilize engine waste heat and still needs to be heated by the PTC car heater, resulting in energy waste. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a waste heat recovery device for range-extended vehicle engines, capable of achieving heat exchange between hot and cold water, and integrating a three-way water valve to control the on / off state of heat exchange. The specific technical solution is as follows:

[0004] A waste heat recovery device for a range-extended vehicle engine includes heat exchange tubes, an electronic three-way water valve, a heat exchange base plate, a heat exchange shelf plate, and a heat exchange top plate. The heat exchange base plate, heat exchange shelf plate, and heat exchange top plate are fastened together to form a cavity, and heat exchange tube perforations are provided on the same side, with the heat exchange tubes passing through the perforations to form a circuit. An engine hot water inlet is provided on the other side of the heat exchange base plate, and an engine hot water outlet is provided on the other side of the heat exchange top plate. Heat exchange tubes are installed inside the heat exchange shelf plate, with a heater cold water inlet and a heater cold water outlet at both ends. The heat exchange base plate has a perforation for the heater cold water inlet, and the heat exchange top plate has a perforation for the heater cold water outlet. A short-circuit pipe and an electronic water valve are provided between the heater cold water inlet and the heater cold water outlet.

[0005] Furthermore, the range extender vehicle engine waste heat recovery device is connected to the heater core, water pump, PTC car heater and engine to form an engine waste heat exchange circuit.

[0006] Furthermore, the heat exchange tubes and heat exchange plates are made of aluminum or copper.

[0007] The principle of waste heat recovery in range-extended vehicles: The engine circuit recovers waste heat through this device and the heating circuit, reducing the working time of the PTC car heater. At the same time, it can be short-circuited to avoid energy waste when the heating circuit is working but the engine is not running.

[0008] This invention allows waste heat from the engine to be transferred to the heating circuit, reducing the heating time of the PTC car heater and achieving energy savings. It uses a combination of aluminum or copper heat exchange tubes and plates, with the heat exchange tubes being as long as possible to increase the heat exchange contact area and create convection between hot and cold water, thus improving heat exchange efficiency. Physical isolation between hot and cold water isolates the high-pressure engine circuit, and due to the efficient heat transfer, the temperature of the resulting heating circuit is more suitable. A three-way water valve enables short-circuiting of the water-to-water heat exchanger. When the engine coolant temperature is low, the heating circuit can bypass the heat exchanger, preventing the PTC car heater from reversing heat transfer and heating the engine coolant. Attached Figure Description

[0009] Figure 1 A schematic diagram of the structure of this utility model;

[0010] Figure 2 Exploded view of this utility model;

[0011] Figure 3 Schematic diagram of the water circuit heat exchange of this utility model:

[0012] Figure 4 This utility model provides a schematic diagram of the water flow direction in the heat exchange tube when the three-way valve is connected.

[0013] Figure 5 A schematic diagram of the heat exchange tube routing when the three-way valve of this utility model is short-circuited;

[0014] Figure 6 This utility model has a connection diagram.

[0015] Figure label:

[0016] 1. Heat exchange tubes; 2. Electronic three-way water valve; 3. Heat exchange base plate; 4. Heat exchange shelf; 5. Heat exchange top plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1-2As shown, a waste heat recovery device for a range-extended vehicle engine includes a heat exchange pipe 1, an electronic three-way water valve 2, a heat exchange base plate 3, a heat exchange shelf 4, and a heat exchange top plate 5. The heat exchange base plate, heat exchange shelf 4, and heat exchange top plate are fastened together to form a cavity, and heat exchange pipe perforations are provided on the same side, with the heat exchange pipes passing through the perforations to form a circuit. An engine hot water inlet is provided on the other side of the heat exchange base plate, and an engine hot water outlet is provided on the other side of the heat exchange top plate. A heat exchange pipe is installed inside the heat exchange shelf 4, with a heater cold water inlet and a heater cold water outlet at both ends. The heat exchange base plate has a perforation for the heater cold water inlet, and the heat exchange top plate has a perforation for the heater cold water outlet. A short-circuit pipe and an electronic water valve are provided between the heater cold water inlet and the heater cold water outlet.

[0019] When using, connect as follows: Figure 6 As shown, the engine circuit recovers waste heat from the heater circuit through this device, reducing the operating time of the PTC car heater. It can also be short-circuited to prevent energy waste when the heater circuit is working but the engine is not. Engine waste heat enters the heat exchanger via hot water from the heat exchange plate. The heater circuit, through the inlet and outlet of the heat exchanger tubes, transfers the converted engine waste heat to the heater circuit via a water pump. Figure 3 As shown in the diagram. When the three-way valve is open, the water flow in the heat exchange tubes can exchange heat with the hot water in the heat exchange plates, achieving engine waste heat recovery. Figure 4 As shown; Schematic diagram of heat exchange pipe routing when the three-way valve is short-circuited: When the three-way valve is short-circuited, the heat recovery device is short-circuited and no heat exchange occurs; This avoids reverse heat exchange when the engine is not running but the heating circuit is working, causing the PTC car heater to do unnecessary work and resulting in energy waste, such as... Figure 5 As shown.

[0020] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A waste heat recovery device for a range-extended vehicle engine, characterized in that: The system includes heat exchange tubes, an electronic three-way water valve, a heat exchange base plate, a heat exchange shelf plate, and a heat exchange top plate. The heat exchange base plate, heat exchange shelf plate, and heat exchange top plate are interlocked to form a cavity, and heat exchange tube perforations are provided on the same side, through which the heat exchange tubes pass to form a circuit. An engine hot water inlet is provided on the other side of the heat exchange base plate, and an engine hot water outlet is provided on the other side of the heat exchange top plate. Heat exchange tubes are installed inside the heat exchange shelf plate, with a heater cold water inlet and a heater cold water outlet at each end. The heat exchange base plate has a perforation for the heater cold water inlet, and the heat exchange top plate has a perforation for the heater cold water outlet. A short-circuit pipe and an electronic water valve are provided between the heater cold water inlet and the heater cold water outlet.

2. The waste heat recovery device for a range-extended vehicle engine according to claim 1, characterized in that: The range-extended vehicle engine waste heat recovery device is connected to the heater core, water pump, PTC car heater and engine to form an engine waste heat exchange circuit.

3. The waste heat recovery device for a range-extended vehicle engine according to claim 1, characterized in that: The heat exchange tubes and heat exchange plates are made of aluminum or copper.

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