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 sealing 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.

Description

Aluminum fin heat dissipation device for electric outboard motor Technical Field

[0001] The invention belongs to the field of electric outboard motor machinery, and in particular relates to an aluminum fin plate heat dissipation device for an electric outboard motor. Background Art

[0002] Currently, traditional outboard motors generally use water cooling.

[0003] The components that need to be cooled by the fuel outboard motor are: 1. Engine, 2. Reducer;

[0004] Engine cooling method: Seawater is sucked in through a shaft-belt pump and circulated in the engine water circuit;

[0005] Heat dissipation method of reducer: The heat generated by gear friction is transferred through lubricating oil, and heat exchange occurs on the inner and outer surfaces of the shell;

[0006] Advantages: The heat dissipation water path structure is simple and the parasitic power is small.

[0007] Disadvantages: The impeller of the shaft-belt pump is made of rubber and is prone to aging, requiring regular replacement. There's no heat dissipation guarantee after the engine is shut down, posing a significant risk of seawater corrosion to the engine's waterways. Each shutdown requires a 3-5 minute freshwater flush of the engine piping, making maintenance cumbersome. Furthermore, because fuel-powered engines are far less efficient than electric motors, they require high heat dissipation requirements, a wide variety of components, and are heavy and bulky.

[0008] Cooling components and heat dissipation methods of electric outboard motors:

[0009] The heat dissipation components of electric outboard motors include: motor, electronic control, and reducer;

[0010] The mainstream heat dissipation methods in the electric outboard motor industry are: 1. Internal water cooling and external air cooling plate exchange heat dissipation, 2. Internal water cooling and external water cooling plate exchange heat dissipation, 3. Integrated internal water cooling heat dissipation;

[0011] Due to the large heat dissipation power requirements of high-power outboard motors, the second solution is generally adopted, such as the YDKJ (Guangdong Yidong Technology Co., Ltd.) patent: PCT / CN2021 / 130142 (as shown in Figure 1, where A is the heat exchanger, B is the heat-generating component, AA is the first cooling circuit, BB is the external cooling circuit, and CC is the second cooling circuit). This method has the same disadvantages as fuel outboard motors.

[0012] Water-cooling an outboard motor increases its weight, hindering its lightweight design. Therefore, to improve cooling efficiency and capacity while also minimizing weight, an aluminum fin heat sink is employed. Technical issues

[0013] While ensuring that the electric outboard motor can meet the heat dissipation requirements, how to reduce the weight of the electric outboard motor while ensuring effective heat dissipation, improving work efficiency and reducing weight. Technical Solutions

[0014] In order to solve the above technical problems, the purpose of the present invention is to provide an aluminum fin heat sink for an electric outboard motor.

[0015] To achieve the above object, the present invention adopts the following technical solutions:

[0016] The heat dissipation device of the present invention is a heat dissipation device for an electric outboard motor, comprising: an underwater cooling shell, wherein a first cooling cavity and a second cooling cavity are provided in the underwater cooling shell, the first cooling cavity and the second cooling cavity are connected by a water flow channel, a plurality of spaced and vertical internal heat dissipation ribs are provided along the inner walls of the first cooling cavity and the second cooling cavity, and a plurality of spaced and transverse external heat dissipation ribs are provided on the outer walls of the first cooling cavity and the second cooling cavity. The underwater cooling shell is connected to a sealing cover for sealing the first cooling cavity and the second cooling cavity, the sealing cover is connected to a cooling liquid inlet connected to the first cooling cavity, the sealing cover is connected to a cooling liquid outlet connected to the second cooling cavity, the cooling liquid inlet and the cooling liquid outlet are circulated and connected through a cooling pipe and a cooling circulation pump; a first heat exchange filling block and a second heat exchange filling block matching their respective shapes are respectively embedded in the first cooling cavity and the second cooling cavity, and a plurality of guide channels for the flow of cooling liquid are provided on the surfaces of the first heat exchange filling block and the second heat exchange filling block.

[0017] Preferably, in the electric outboard motor aluminum fin heat sink device, the underwater cooling shell is made of aluminum alloy.

[0018] Preferably, in the aluminum fin heat sink device for an electric outboard motor, the cooling pipe is connected to the motor controller and the built-in heat dissipation circulation pipe of the motor.

[0019] Preferably, in the aluminum fin heat sink device for an electric outboard motor, the first heat exchange filling block and the second heat exchange filling block are both structures that are wide at the top and narrow at the bottom.

[0020] Preferably, in the aluminum fin heat sink device for an electric outboard motor, the cooling circulation pump is externally connected to an expansion kettle through a cooling pipe.

[0021] Preferably, in the electric outboard motor aluminum fin heat sink, the coolant in the cooling circulation pump is 50% ethylene glycol.

[0022] Preferably, in the aluminum fin heat sink device for an electric outboard motor, the first heat exchange filling block and the second heat exchange filling block are connected to the cover by bolts.

[0023] Preferably, in the aluminum fin heat sink device for an electric outboard motor, the first heat exchange filling block and the second heat exchange filling block are both heat exchange filling blocks made of corrosion-resistant hard plastic material.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings.

[0025] Beneficial effects

[0026] By means of the above solution, the present invention has at least the following advantages:

[0027] The present invention can reduce the weight of the electric outboard motor while ensuring that the electric outboard motor can meet the heat dissipation requirements, and can also ensure effective heat dissipation, thereby improving work efficiency and reducing weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0029] FIG1 is a conventional electric outboard motor cooling system;

[0030] FIG2 is a schematic structural diagram of the present invention;

[0031] FIG3 is a cross-sectional view of FIG2;

[0032] FIG4 is an exploded schematic diagram of the underwater cooling housing of the present invention;

[0033] FIG5 is a schematic structural diagram of an underwater cooling housing according to the present invention;

[0034] FIG6 is a schematic structural diagram of a first heat exchange filling block of the present invention;

[0035] FIG7 is a schematic structural diagram of a second heat exchange filling block of the present invention. Modes for Carrying Out the Invention

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application. Example

[0038] As shown in Figures 2 to 7, an electric outboard motor aluminum fin heat dissipation device includes an underwater cooling shell 1, wherein a first cooling cavity 2 and a second cooling cavity 3 are provided in the underwater cooling shell 1, wherein the first cooling cavity 2 and the second cooling cavity 3 are connected by a water flow channel, and a plurality of spaced and vertical internal heat dissipation ribs 4 are provided on the inner walls of the first cooling cavity 2 and the second cooling cavity 3, and a plurality of spaced and horizontal external heat dissipation ribs 5 are provided on the outer walls of the first cooling cavity 2 and the second cooling cavity 3, and the underwater cooling shell 1 is connected to the first cooling cavity 2 and the second cooling cavity. 3 sealed cover 6, the cover 6 is connected to a coolant inlet 7 communicating with the first cooling cavity 2, the cover 6 is connected to a coolant outlet 8 communicating with the second cooling cavity 3, the coolant inlet 7 and the coolant outlet 8 are circulated through a cooling pipe 9 and a cooling circulation pump 10; the first cooling cavity 2 and the second cooling cavity 3 are respectively embedded with a first heat exchange filling block 13 and a second heat exchange filling block 14 matching their respective shapes, and a plurality of guide channels 15 for the flow of coolant are formed on the surface of the first heat exchange filling block 13 and the second heat exchange filling block 14.

[0039] The underwater cooling shell 1 described in the present invention is a shell made of aluminum alloy, and the surface is hard anodized and passivated, and the outermost surface is coated with marine anti-corrosion paint to ensure heat conduction efficiency while meeting the anti-corrosion requirements of marine working conditions.

[0040] The cooling pipe 9 of the present invention is connected to the motor controller 12 and the built-in heat dissipation circulation pipe of the motor 11.

[0041] In the present invention, the first heat exchange filling block 13 and the second heat exchange filling block 14 are both wide at the top and narrow at the bottom. The widths of the guide channels of the first heat exchange filling block 13 and the second heat exchange filling block 14 are also different at the top and bottom. The width of the guide channel can be optimized according to the flow resistance simulation to obtain a suitable width.

[0042] The cooling circulation pump 10 of the present invention is externally connected to an expansion kettle 16 via a cooling pipe.

[0043] The coolant in the cooling circulation pump 10 of the present invention is 50% ethylene glycol.

[0044] In the present invention, the first heat exchange filling block 13 and the second heat exchange filling block 14 are connected to the cover 14 by bolts.

[0045] In the present invention, the first heat exchange filling block 13 and the second heat exchange filling block 14 are both heat exchange filling blocks made of corrosion-resistant hard plastic material.

[0046] The working principle of the present invention is as follows:

[0047] This invention utilizes the excellent heat dissipation performance of aluminum alloy shell materials to integrate heat exchangers on the front and rear sides of the underwater shell. This can meet the full-dimensional heat dissipation requirements of the motor, electronic control, and reducer. Compared with traditional solutions, it saves one plate heat sink and one electronic water pump, reduces weight, and improves efficiency.

[0048] The present invention improves heat dissipation efficiency by:

[0049] 1. Increase heat exchange area;

[0050] 2. Improve the efficiency of convective heat transfer, that is, increase the surface velocity of the heat exchange fluid;

[0051] 3. Improve the thermal conductivity of materials.

[0052] The present invention dissipates heat from the coolant in the lower cavity of the outboard motor (underwater cooling housing), and then transmits the dissipated coolant (such as 50% ethylene glycol) to the motor and motor controller through a cooling circulation pump to form a coolant circulation system, thereby cooling the motor and controller.

[0053] The underwater cooling housing of the present invention is lightweight in design. The cavity shell is made of aluminum alloy and contains two cooling cavities (i.e., the first cooling cavity and the second cooling cavity). The right side is the coolant inlet and the left side is the coolant outlet.

[0054] The vertical heat dissipation ribs in the cooling cavity increase the heat dissipation area and improve the heat dissipation performance; the horizontal heat dissipation ribs outside the cavity increase the heat dissipation area and improve the heat dissipation performance;

[0055] The cooling circulating water pump is used to provide power for transporting the coolant for cooling and constitute a coolant circulation system;

[0056] The cooling pipe is used to provide a channel for the circulation of the coolant, and the entire system is a closed water cooling system and does not require anti-corrosion treatment;

[0057] The expansion kettle is used to replenish the cooling liquid after the loss of the cooling liquid, so that the system maintains a good cooling effect, and can absorb the volume change of the cooling liquid caused by the temperature difference;

[0058] The motor has a built-in heat dissipation circulating water channel for heat dissipation of the motor;

[0059] The motor controller has a built-in heat dissipation circulating water channel for dissipating heat from the controller.

[0060] The first heat exchange filling block is an anti-corrosion hard plastic part with a transverse flow channel on its outer surface for accelerating the flow rate of the internal water channel.

[0061] The second heat exchange filling block is an anti-corrosion hard plastic part with a transverse flow channel on the outer surface for accelerating the flow rate of the internal water channel.

[0062] The two chambers of the underwater cooling shell of the present invention serve as the device's "heat exchangers." The shell is permanently immersed in seawater, and the internal coolant exchanges heat with the external seawater through the aluminum alloy cavity walls. The coolant flowing within the chambers is 50% ethylene glycol. The coolant inlet is located on the right side of the shell, and the outlet is located on the left side. Furthermore, two water channels connect the first and second cooling cavities (i.e., the left and right cavities), ensuring water flow between the left and right cavities, with water flowing from the right cavity to the left. Vertical heat dissipation ribs are installed within each cavity. The internal vertical longitudinal ribs are calculated based on flow resistance simulation to increase the heat dissipation area and improve heat dissipation efficiency. Similarly, horizontal heat dissipation ribs are installed outside the cavity to increase heat dissipation area and improve heat dissipation efficiency. The external transverse ribs are also calculated based on flow resistance simulation to prevent excessive flow resistance from affecting propulsion efficiency. The internal and external ribs increase the heat dissipation surface area while also enhancing the strength of the underwater shell.

[0063] To increase the flow rate of circulating water on the surface of the underwater cooling shell, plastic heat exchange filler blocks are installed in the left and right cavities of the underwater cooling shell. Because the heat exchange filler blocks occupy the majority of the volume of the shell's internal cavity, the circulating coolant will mostly pass through the inner surface of the cavity, rather than the center of the cavity. This significantly increases the flow rate on the inner surface of the shell and greatly improves heat dissipation efficiency. Furthermore, the heat exchange filler blocks are made of hard plastic and have a lower density than coolant, which can reduce the overall weight of the outboard motor. The surface of the heat exchange filler blocks has multiple flow channels that guide the water from right to left, preventing the formation of stagnant water. The filler blocks adopt a structure that is wide at the top and narrow at the bottom, ensuring that the water flow can fully utilize the left and right heat dissipation cavities. The above designs are verified using flow resistance and heat dissipation simulations. The internal flow channels are optimized to reduce flow resistance while fully meeting the heat dissipation requirements of the motor and electronic control.

[0064] The coolant circulation pump is a common, mature product, and its flow rate and head meet the design requirements. When the motor is powered, the coolant circulation pump drives the internal coolant circulation pump to transfer the coolant in the cooling chamber to the motor and controller, forming a coolant circulation system, thereby cooling the motor, controller, and reducer.

[0065] To maintain effective cooling performance and capacity, the cooling system requires a sufficient supply of coolant. To this end, the cooling system features an expansion kettle for replenishing coolant after loss, ensuring optimal cooling. This also absorbs volume changes caused by temperature fluctuations. This expansion kettle is a well-established transparent plastic kettle designed for convenient refilling and coolant expansion.

[0066] The present invention adopts a closed internal circulation cooling system, and the cooling circuit is completely isolated from the external water body. Impurities such as salt, mud and dirt will not enter the water channel. There is no need to worry about corrosion, blockage and other problems in the shell water channel. The user does not need to flush the pipe after each use. The maintenance-free system greatly facilitates users and also increases the life of the outboard motor.

[0067] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0068] In the description of this application, it should be noted that the terms "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0069] In addition, the terms "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or vertical, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0070] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An aluminum fin heat sink for an electric outboard motor, comprising an underwater cooling housing (1), characterized in that: The underwater cooling shell (1) is provided with a first cooling cavity (2) and a second cooling cavity (3), the first cooling cavity (2) and the second cooling cavity (3) are connected via a water flow channel, a plurality of spaced-apart and vertical internal heat dissipation ribs (4) are provided along the inner walls of the first cooling cavity (2) and the second cooling cavity (3), a plurality of spaced-apart and horizontal external heat dissipation ribs (5) are provided on the outer walls of the first cooling cavity (2) and the second cooling cavity (3), the underwater cooling shell (1) is connected with a sealing cover (6) for sealing the first cooling cavity (2) and the second cooling cavity (3), the sealing cover (6) is connected with a A cooling liquid inlet (7) is connected to the first cooling cavity (2), and a cooling liquid outlet (8) is connected to the cover (6) and is connected to the second cooling cavity (3). The cooling liquid inlet (7) and the cooling liquid outlet (8) are circulated and connected via a cooling pipe (9) and a cooling circulation pump (10). The first cooling cavity (2) and the second cooling cavity (3) are respectively embedded with a first heat exchange filling block (13) and a second heat exchange filling block (14) that match their respective shapes. A plurality of guide channels (15) are provided on the surfaces of the first heat exchange filling block (13) and the second heat exchange filling block (14) for allowing the cooling liquid to flow.

2. The electric outboard motor aluminum fin heat sink device according to claim 1, characterized in that: The underwater cooling shell (1) is a shell made of aluminum alloy.

3. The aluminum fin heat sink device for electric outboard motor according to claim 1, characterized in that: The cooling pipeline (9) is in communication with the motor controller (12) and the built-in heat dissipation circulation pipe of the motor (11).

4. The aluminum fin heat sink for electric outboard motor according to claim 1, characterized in that: The first heat exchange filling block (13) and the second heat exchange filling block (14) are both structures that are wide at the top and narrow at the bottom.

5. The aluminum fin heat sink device for electric outboard motor according to claim 1, characterized in that: The cooling circulation pump (10) is externally connected to an expansion kettle (16) via a cooling pipeline.

6. The aluminum fin heat sink device for electric outboard motor according to claim 1, characterized in that: The coolant in the cooling circulation pump (10) is 50% ethylene glycol.

7. The aluminum fin heat sink for electric outboard motor 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 cover (14) via bolts.

8. The aluminum fin heat sink device for electric outboard motor according to claim 7, characterized in that: The first heat exchange filling block (13) and the second heat exchange filling block (14) are both heat exchange filling blocks made of corrosion-resistant hard plastic material.

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