EP-4737307-A1 - ELECTRIC OUTBOARD MOTOR ALUMINUM PLATE-FIN HEAT DISSIPATION DEVICE

Abstract

The present invention relates to an electric outboard motor aluminum plate-fin heat dissipation device, comprising an underwater cooling housing, a first cooling cavity and a second cooling cavity being formed in the underwater cooling housing, and the first cooling cavity being communicated with the second cooling cavity by means of a water flow channel. The underwater cooling housing is connected to a sealing cover for sealing the first cooling cavity and the second cooling cavity; the sealing cover is connected to a coolant inlet communicated with the first cooling cavity, and the scaling cover is connected to a coolant outlet communicated with the second cooling cavity, the coolant inlet and the coolant outlet being cyclically communicated with each other by means of a cooling pipe and a cooling recirculating pump. A first heat exchange filling block and a second heat exchange filling block which are respectively matched with the first cooling cavity and the second cooling cavity in shape are embedded in the first cooling cavity and the second cooling cavity respectively, surfaces of the first heat exchange filling block and the second heat exchange filling block both being provided with a plurality of flow guide channels for the coolant to flow. The present invention can reduce the weight while ensuring a heat dissipation effect.

Inventors

• WEI, Jingyi
• LI, BAOSHI
• MA, Shimeng

Assignees

• EXPLOMAR (SUZHOU) ENERGY TECHNOLOGY CO., LTD.

Dates

Publication Date

20260506

Application Date

20230816

Claims (8)

1. An electric outboard motor aluminum plate-fin heat dissipation device, characterized by comprising an underwater cooling housing (1), wherein a first cooling cavity (2) and a second cooling cavity (3) are disposed in the underwater cooling housing (1), the first cooling cavity (2) is communicated with the second cooling cavity (3) by means of a water flow channel, inner walls of the first cooling cavity (2) and the second cooling cavity (3) both are provided with a plurality of spaced and vertical inner heat dissipation ribs (4), outer walls of the first cooling cavity (2) and the second cooling cavity (3) both are provided with a plurality of spaced and transverse outer heat dissipation ribs (5), the underwater cooling housing (1) is connected to a sealing cover (6) for sealing the first cooling cavity (2) and the second cooling cavity (3), the sealing cover (6) is connected to a coolant inlet (7) communicated with the first cooling cavity (2), the sealing cover (6) is connected to a coolant outlet (8) communicated with the second cooling cavity (3), and the coolant inlet (7) and the coolant outlet (8) are cyclically communicated with each other by means of a cooling pipe (9) and a cooling recirculating pump (10); and a first heat exchange filling block (13) and a second heat exchange filling block (14) which are respectively matched with the first cooling cavity and the second cooling cavity in shape are embedded in the first cooling cavity (2) and the second cooling cavity (3) respectively, and surfaces of the first heat exchange filling block (13) and the second heat exchange filling block (14) both are provided with a plurality of flow guide channels (15) for coolant to flow.
2. The electric outboard motor aluminum plate-fin heat dissipation device according to claim 1, characterized in that the underwater cooling housing (1) is a housing made of an aluminum alloy material.
3. The electric outboard motor aluminum plate-fin heat dissipation device according to claim 1, characterized in that the cooling pipe (9) is communicated with built-in heat dissipation recirculating pipes of an inverter (12) and a motor (11).
4. The electric outboard motor aluminum plate-fin heat dissipation device according to claim 1, characterized in that the first heat exchange filling block (13) and the second heat exchange filling block (14) both are of structures with wide upper portions and narrow lower portions.
5. The electric outboard motor aluminum plate-fin heat dissipation device according to claim 1, characterized in that the cooling recirculating pump (10) is externally connected to an expansion kettle (16) by means of the cooling pipe.
6. The electric outboard motor aluminum plate-fin heat dissipation device according to claim 1, characterized in that the coolant in the cooling recirculating pump (10) is 50% ethylene glycol.
7. The electric outboard motor aluminum plate-fin heat dissipation device according to claim 1 or 4, characterized in that the first heat exchange filling block (13) and the second heat exchange filling block (14) are connected to the sealing cover (14) by means of bolts.
8. The electric outboard motor aluminum plate-fin heat dissipation device according to claim 7, characterized in that the first heat exchange filling block (13) and the second heat exchange filling block (14) both are heat exchange filling blocks made of an anti-corrosion hard plastic material.

Description

TECHNICAL FIELD The present invention belongs to the field of electric outboard motor machinery, and particularly relates to an electric outboard motor aluminum plate-fin heat dissipation device. BACKGROUND Currently, traditional outboard motors generally use water cooling. Components of fuel-powered outboard motors that require heat dissipation include: 1. an engine; and 2. a reducer. Heat dissipation approaches of the engine: seawater is drawn in by the shaft-driven pump and circulated in the waterway of the engine. Heat dissipation approaches of the reducer: the heat generated by gear friction is conducted by means of the lubricating oil, and heat exchange is performed between the inner and outer surfaces of the housing. Advantages: the heat dissipation waterway is simple in structure and low in parasitic power. Disadvantages: the impeller of the shaft-driven pump is a rubber member and is prone to aging, requiring regular replacement; there is no heat dissipation protection after the engine is shut down, increasing the risk of seawater corrosion in the waterway of the engine; each shutdown requires a 3 to 5 minute freshwater flush of the pipe of the engine, making maintenance troublesome; and since the efficiency of fuel-powered motor products is far lower than that of electric motor products, the fuel-powered motor products feature high heat dissipation power, a wide variety of parts and components, heavy weight, and large volume. Cooling components and heat dissipation approaches of electric outboard motors: Components of the electric outboard motors that require heat dissipation include: a motor, an inverter, and a reducer. Mainstream heat dissipation approaches in the electric outboard motor industry: 1. internal water cooling and external air cooling heat dissipation with a plate heat exchanger, 2. internal water cooling and external water cooling heat dissipation with a plate heat exchanger, and 3. integrated internal water cooling heat dissipation. Due to the high heat dissipation power requirements of high-power outboard motors, the second solution is generally used, such as a patent of YDKJ (Guangdong ePropulsion Co., Ltd.): PCT/CN2021/130142 (as shown in FIG. 1, where A is a heat exchanger, B is a heating component, AA is a first cooling loop, BB is an external cooling loop, and CC is a second cooling loop). This approach has the same disadvantages as fuel-powered outboard motors. The related design of using water cooling in outboard motors may increase the weight of the outboard motors, which is not conducive to the lightweight design of the outboard motors. Therefore, to improve the cooling effects and capabilities of the outboard motors, and considering the lightweight design, an aluminum plate-fin heat dissipation device is used. SUMMARY Technical Problem While ensuring that an electric outboard motor can meet heat dissipation, how to reduce the weight of the electric outboard motor while ensuring effective heat dissipation and reduce the weight while improving working efficiency. Technical Solution To solve the above technical problem, the purpose of the present invention is to provide an electric outboard motor aluminum plate-fin heat dissipation device. To achieve the above purpose, the present invention adopts the following technical solution: An electric outboard motor aluminum plate-fin heat dissipation device, including an underwater cooling housing, where a first cooling cavity and a second cooling cavity are disposed in the underwater cooling housing, the first cooling cavity is communicated with the second cooling cavity by means of a water flow channel, inner walls of the first cooling cavity and the second cooling cavity both are provided with a plurality of spaced and vertical inner heat dissipation ribs, outer walls of the first cooling cavity and the second cooling cavity both are provided with a plurality of spaced and transverse outer heat dissipation ribs, the underwater cooling housing is connected to a sealing cover for sealing the first cooling cavity and the second cooling cavity, the sealing cover is connected to a coolant inlet communicated with the first cooling cavity, the sealing cover is connected to a coolant outlet communicated with the second cooling cavity, and the coolant inlet and the coolant outlet are cyclically communicated with each other by means of a cooling pipe and a cooling recirculating pump; and a first heat exchange filling block and a second heat exchange filling block which are respectively matched with the first cooling cavity and the second cooling cavity in shape are embedded in the first cooling cavity and the second cooling cavity respectively, and surfaces of the first heat exchange filling block and the second heat exchange filling block both are provided with a plurality of flow guide channels for coolant to flow. Preferably, according to the electric outboard motor aluminum plate-fin heat dissipation device, the underwater cooling ho