Internal circulation cooling system of electric outboard motor
By installing an internal circulation cooling system inside the electric boat's outboard motor, and utilizing the chamber and rib structure to achieve coolant circulation and heat exchange, the problem of reduced heat dissipation performance and maintenance difficulties caused by copper pipes being immersed in water has been solved, resulting in stable operation and cost reduction.
Patent Information
- Application Number
- CN202511119094.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-11
- Publication Date
- 2025-11-18
AI Technical Summary
In existing electric boat outboard motor cooling systems, copper pipes are prone to scale buildup and microbial adhesion due to long-term immersion in water, leading to decreased heat dissipation performance and corrosion of the copper pipes by corrosive substances, increasing maintenance difficulty and operating costs.
An internal circulation cooling system was designed, including a frequency converter, a motor, a water pump, a water tank, a heat dissipation channel, and multiple chambers. By setting ribs and flow channels in the chambers, the coolant can circulate within the chambers and exchange heat with the external water environment on the chamber walls, thus avoiding the use of copper pipes.
It improves the heat dissipation effect of the coolant, ensures the stable operation of the electric outboard motor, reduces maintenance frequency and operating costs, and avoids copper pipe blockage and leakage problems.
Smart Images
Figure CN120964015A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the field of outboard motor cooling technology, and particularly relates to an electric outboard motor internal circulation cooling system. BACKGROUND
[0002] At present, the cooling system of the electric outboard motor is to extract the cooling liquid in the storage tank through the water pump, flow through the water pump, motor and frequency converter, so that the cooling liquid is cooled, and then the cooling liquid flows to the copper pipe immersed in water in the gear box, so that the cooling liquid is cooled, and finally the cooling liquid returns to the storage tank and is repeatedly circulated. However, the copper pipe is immersed in water for a long time, which is prone to problems such as scale deposition and microbial attachment, resulting in a decrease in heat dissipation performance. In addition, the corrosive substances in the water may corrode the copper pipe, resulting in a decrease in the wall thickness and strength of the copper pipe, and even causing leakage, which pollutes the cooling liquid and affects the heat dissipation performance. The impurities and microorganisms in the cooling system may also block the cooling system, affect the flow of the cooling liquid, and thus reduce the circulation efficiency and cooling effect, so that the copper pipe needs to be regularly maintained and replaced, increasing the operation cost and maintenance difficulty.
[0003] Therefore, there is an urgent need to provide an electric outboard motor internal circulation cooling system to solve the above problems. SUMMARY
[0004] The application aims to overcome the deficiencies and defects of the prior art, and provide an electric outboard motor internal circulation cooling system, which effectively improves the heat dissipation effect of the cooling liquid and ensures the stable operation of the electric outboard motor.
[0005] The application is achieved by the following technical scheme: The electric outboard motor internal circulation cooling system comprises a frequency converter, a motor, a water pump, a water tank, a heat dissipation channel and a gear box. The frequency converter, the motor, the water pump and the water tank are located above the gear box. The gear box is internally provided with a first chamber, a second chamber and a third chamber. One end of the heat dissipation channel is connected with the water pump. The other end of the heat dissipation channel is sequentially connected with the frequency converter, the motor and the first chamber in communication. One end of the water tank is connected with the water pump. The other end of the water tank is connected with the third chamber. The first chamber and the second chamber are in communication. The second chamber and the third chamber are in communication. A plurality of vertical rib plates are arranged in the first chamber and the second chamber. A first flow channel is arranged on the top of one rib plate between two adjacent rib plates. A second flow channel is arranged on the bottom of the other rib plate.
[0006] As a preferred technical scheme of the application, the inner wall of the first chamber and the second chamber is provided with a fixing position. The rib plate is welded to the fixing position.
[0007] As a preferred technical scheme of the present application, the second chamber and the third chamber are connected through a flow channel, one end of the flow channel is connected with the second chamber, the other end of the flow channel is connected with the third chamber, and the flow channel is located above the gear box.
[0008] As a preferred technical scheme of the present application, the first chamber and the second chamber are communicated through a third flow channel, the first chamber is provided with a first communication port, the first communication port is connected with one end of the third flow channel, the second chamber is provided with a second communication port, the second communication port is connected with the other end of the third flow channel, and the height of the first communication port is higher than that of the second communication port.
[0009] As a preferred technical scheme of the present application, the first chamber, the second chamber and the third chamber are all covered with a box cover, and a sealing ring is arranged at the connection between the box cover and each of the first chamber, the second chamber and the third chamber.
[0010] Compared with the prior art, the present application has the following beneficial effects: The present application sets the first chamber, the second chamber and the third chamber in the gear box, the water pump pumps the coolant from the water tank, the coolant flows through the frequency converter and the motor in sequence through the heat dissipation channel to cool them, the coolant whose temperature is increased after absorbing the heat generated by the frequency converter and the motor enters the first chamber from the second chamber, and finally reaches the third chamber, and the flowing coolant exchanges heat with the external water environment through the chamber wall in the process, so that the temperature of the coolant is reduced. A plurality of vertical rib plates are arranged in the first chamber and the second chamber, the surface area of the inner wall of the chamber is increased, the contact area of the coolant and the inner wall of the chamber is increased, and the heat dissipation efficiency is improved. The first flow channel is arranged on the top of one of the two adjacent rib plates, and the second flow channel is arranged on the bottom of the other rib plate, so that the flow path of the coolant in the first chamber and the second chamber is accurately controlled, the coolant can flow completely, and sufficient heat dissipation is achieved, and the heat dissipation performance is good. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is a structural schematic diagram of the cooling system of the present application.
[0012] Figure 2 It is a structural schematic diagram of the gear box of the present application.
[0013] Figure 3 It is a front view of the present application.
[0014] Figure 4 It is Figure 3 It is a sectional view along the direction of A-A'.
[0015] Figure 5This is the top view of the present invention.
[0016] Among them, the above-mentioned drawings include the following reference numerals: 1. Gearbox, 2. Cooling channel, 3. First chamber, 4. Second chamber, 5. Third chamber, 6. Rib plate, 7. First flow channel, 8. Second flow channel, 9. Third flow channel, 10. Flow pipeline, 11. Fixed position, 12. Case cover, 13. Stainless steel steel pipe. Specific embodiments
[0017] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.
[0018] The specific implementation process of the present invention is as follows: As Figures 1 to 5 shown, the internal circulation cooling system of an outboard motor for electric boats includes an inverter, a motor, a water pump, a water tank, a cooling channel 2, and a gearbox 1. The inverter, the motor, the water pump, the water tank, and the cooling channel 2 are all located above the gearbox 1. The gearbox 1 is provided with a first chamber 3, a second chamber 4, and a third chamber 5. One end of the cooling channel 2 is connected to the water pump, and the other end of the cooling channel 2 sequentially passes through the inverter, the motor and is connected to the first chamber 3. One end of the water tank is connected to the water pump, and the other end of the water tank is connected to the third chamber 5. The first chamber 3 is connected to the second chamber 4, and the second chamber 4 is connected to the third chamber 5. A plurality of vertically arranged rib plates 6 are spaced in both the first chamber 3 and the second chamber 4. A first flow channel 7 is provided at the top of one rib plate 6 among two adjacent rib plates 6, and a second flow channel 8 is provided at the bottom of the other rib plate 6.
[0019] Specifically, the cooling pipeline is arranged close to the inverter and the motor; the water tank stores coolant, and the water pump pumps the coolant from the water tank. The coolant flows through the inverter and the motor in sequence through the cooling channel 2 to cool them; the coolant absorbs the heat generated by the inverter and the motor and then its temperature rises, and then the coolant enters the first chamber 3; the first chamber 3 and the second chamber 4 are used to cool the heated coolant. The first chamber 3 is connected to the second chamber 4, and the coolant entering the first chamber 3 then flows through the second chamber 4. The second chamber 4 is connected to the third chamber 5 through a flow pipeline 10. One end of the flow pipeline 10 is connected to the second chamber 4, and the other end of the flow pipeline 10 is connected to the third chamber 5. The flow pipeline 10 is located above the gearbox 1. The coolant cooled by the first chamber 3 and the second chamber 4 enters the third chamber 5 through the flow pipeline 10 for storage and standby. The third chamber 5 is connected to the water tank through a stainless steel steel pipe 13. One end of the stainless steel steel pipe 13 is connected to the third chamber 5, and the other end of the stainless steel steel pipe 13 is connected to the water tank. The cooled coolant stored in the third chamber 5 is pumped back into the water tank by the water pump, so as to realize the recycling of the coolant.
[0020] A plurality of vertically arranged rib plates 6 are provided at intervals inside both the first chamber 3 and the second chamber 4. The plurality of vertically arranged rib plates 6 can not only support the structure of the chambers, ensure the strength and stability of the chambers, but also divide the first chamber 3 and the second chamber 4 into a plurality of coolant flow channels. Among two adjacent rib plates 6, a first flow channel 7 is provided at the top of one rib plate 6, and a second flow channel 8 is provided at the bottom of the other rib plate 6. The cooperation of the first flow channel 7 and the second flow channel 8 enables the coolant to form a continuous flow path in the first chamber 3 and the second chamber 4, as Figure 5 shown. When the coolant enters the first chamber 3 from the heat dissipation channel 2, it first flows through a coolant flow channel, and then flows into the next coolant flow channel through the second flow channel 8. Then, the coolant continues to flow and flows into the next coolant flow channel again through the first flow channel 7, and so on. Until the coolant flows into the third chamber 5 through the flow pipe 10, completing the entire coolant heat dissipation process. Since the gearbox 1 is located in water, during the process that the coolant flows from the first chamber 3 to the second chamber 4 and finally reaches the third chamber 5, the flowing coolant will exchange heat with the external water environment through the chamber wall, thereby reducing the temperature of the coolant. The housing of the gearbox 1 can be made of materials such as aluminum alloy and stainless steel with excellent corrosion resistance and thermal conductivity, which can adapt to various harsh environments and ensure the coolant heat dissipation effect. The wall thickness of the first chamber 3 and the second chamber 4 can be determined according to actual applications to improve the heat exchange efficiency and ensure the effective reduction of the coolant temperature. The coolant uses antifreeze coolant to prevent the coolant in the gearbox 1 from freezing and expanding to damage the housing, and ensure that the cooling circulation system can work normally in various environments.
[0021] The coolant circulation heat dissipation process of the present application is realized in the first chamber 3 and the second chamber 4. The tops of the first chamber 3, the second chamber 4 and the third chamber 5 are all covered with a box cover 12. Sealing rings are provided at the joints of the box cover 12 and their respective chambers. The box cover 12 is used to enclose and protect the first chamber 3, the second chamber 4 and the third chamber 5, ensure that the coolant will not leak out, and at the same time prevent seawater or other impurities from entering the chamber interior to pollute the coolant, which will not cause blockage of the cooling system or affect its heat dissipation effect, maintain the normal operation of the gearbox 1 and extend its service life, and the coolant can be continuously recycled; no copper pipes are provided, and no regular maintenance is required, effectively reducing the operation cost. By providing a plurality of vertically arranged rib plates 6 at intervals inside the first chamber 3 and the second chamber 4, the surface area of the inner wall of the chamber is increased, and the contact area between the coolant and the inner wall of the chamber is increased, thereby improving the heat dissipation efficiency. By providing a first flow channel 7 at the top of one rib plate 6 among two adjacent rib plates 6 and a second flow channel 8 at the bottom of the other rib plate 6, the flow path of the coolant in the first chamber 3 and the second chamber 4 can be accurately controlled, so that the coolant can flow completely and be fully dissipated, avoiding the situation that local coolant does not participate in the circulation heat dissipation.
[0022] In the embodiment of the present application, the inner walls of the first chamber 3 and the second chamber 4 are each provided with a fixing position 11, and the rib plate 6 can be fixed on the fixing position 11 by welding.
[0023] In an embodiment of the present application, a plurality of vertically arranged rib plates 6 are arranged at intervals in the first chamber 3 and the second chamber 4. The rib plate 6 can be a partition plate or a rib plate 6, or a structure in which a partition plate and a rib plate 6 are arranged at intervals. The rib plate 6 is integrally formed with the first chamber 3 and the second chamber 4, the partition plate is welded on the fixing position 11 by welding, and the rib plate 6 is provided with an opening at the top as a first flow channel 7, and the bottom of the partition plate is designed to not abut against the inner wall of the chamber to form a second flow channel 8.
[0024] In the embodiment of the present application, the second chamber 4 and the third chamber 5 are connected by a flow channel 10, one end of the flow channel 10 is connected with the second chamber 4, the other end of the flow channel 10 is connected with the third chamber 5, the flow channel 10 is located above the gear box 1, and the flow channel 10 can be a stainless steel pipe.
[0025] In the embodiment of the present application, the first chamber 3 and the second chamber 4 are connected by a third flow channel 9, so that the cooling liquid can flow from the first chamber 3 to the second chamber 4. The third flow channel 9 is arranged at the connecting wall between the first chamber 3 and the second chamber 4, the first chamber 3 is provided with a first communication port, the first communication port is connected with one end of the third flow channel 9, the second chamber 4 is provided with a second communication port, the second communication port is connected with the other end of the third flow channel 9, the height of the first communication port is higher than that of the second communication port, and the third flow channel 9 is arranged obliquely, which helps the cooling liquid to flow smoothly from the first chamber 3 to the second chamber 4.
[0026] The above embodiments only express the implementation of the present application, which is described in detail and specifically, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.
Claims
1. An internal circulating cooling system for an electric boat outboard motor, characterized in that, The device includes a frequency converter, a motor, a water pump, a water tank, a heat dissipation channel, and a gearbox. The frequency converter, motor, water pump, water tank, and heat dissipation channel are all located above the gearbox. The gearbox has a first chamber, a second chamber, and a third chamber. One end of the heat dissipation channel is connected to the water pump, and the other end of the heat dissipation channel passes through the frequency converter and the motor and connects to the first chamber. One end of the water tank is connected to the water pump, and the other end of the water tank is connected to the third chamber. The first chamber and the second chamber are connected to each other. Multiple vertically arranged ribs are spaced apart in both the first chamber and the second chamber. One of two adjacent ribs has a first flow channel at the top and a second flow channel at the bottom.
2. The electric boat outboard motor internal circulation cooling system according to claim 1, characterized in that, The inner walls of both the first and second chambers are provided with fixed positions, and the ribs are welded to the fixed positions.
3. The electric boat outboard motor internal circulation cooling system according to claim 1, characterized in that, The second chamber and the third chamber are connected by a flow pipe, one end of which is connected to the second chamber and the other end of which is connected to the third chamber. The flow pipe is located above the gearbox.
4. The electric boat outboard motor internal circulation cooling system according to claim 1, characterized in that, The first chamber and the second chamber are connected by a third flow channel. The first chamber has a first connecting port, which is connected to one end of the third flow channel. The second chamber has a second connecting port, which is connected to the other end of the third flow channel. The height of the first connecting port is higher than that of the second connecting port.
5. The electric boat outboard motor internal circulation cooling system according to claim 1, characterized in that, The top of the first chamber, the second chamber, and the third chamber are all covered with a box cover, and a sealing ring is provided at the connection between the box cover and the first chamber, the second chamber, and the third chamber.
6. The outboard motor gearbox housing with a partition according to claim 1, characterized in that, The third chamber is connected to the water tank via a stainless steel pipe, with one end of the stainless steel pipe connected to the third chamber and the other end connected to the water tank.