Liquid cooling system and controller thereof, power equipment and vehicle

Abstract

This application provides a liquid cooling system and its controller, a power unit, and a vehicle. The power unit includes multiple coolant channels, and the liquid cooling system includes a pressure pump and a diverter valve. Multiple outlets of the diverter valve are connected to the inlets of the multiple coolant channels. The pressure pump delivers coolant to the inlets of the diverter valve through a circulation pipe. The liquid cooling system operates in two modes: a cooling mode and a cleaning mode. At least one outlet has a higher coolant pressure in the cleaning mode than in the cooling mode, achieved by adjusting the opening of the diverter valve outlet or by adjusting the speed of the pressure pump. This liquid cooling system utilizes the inherent components of the power unit and circulation pipes to achieve a self-cleaning effect, eliminating the need for a dedicated cleaning component within the power unit. This allows for a controlled volume of the liquid cooling system, saving interior space in the vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicles, and more particularly to a liquid cooling system, a controller for a liquid cooling system, a power unit, and a vehicle. Background Technology

[0002] During vehicle operation, impurities can easily accumulate inside the power unit, leading to a decrease in the cleanliness of the coolant in the liquid cooling system. This deterioration can cause blockages and abnormal pressure in the cooling system's circulation pipes, affecting the cooling of the motor and the lubrication of the reducer. In severe cases, it can even cause motor overheating, reducer scratches, and other defects, ultimately impacting the lifespan of the power unit.

[0003] The generation of impurities in power equipment is characterized by its sporadic nature, unpredictability, and limited detection capabilities. If impurities are not removed in their early stages, they may develop stronger adhesion after prolonged vehicle operation, requiring specialized, enclosed equipment for removal. However, installing dedicated impurity removal devices in vehicles would increase the size of the power equipment and encroach on the vehicle's interior space. Summary of the Invention

[0004] This application provides a liquid cooling system and its controller, a power unit, and a vehicle. By independently controlling the speed of the pressure pump and the opening of the diversion valve in the liquid cooling system, one or more coolant passages can be cleared, achieving the effect of cleaning the circulating pipes and removing impurities from the power unit. Specifically, this application includes the following technical solutions:

[0005] In a first aspect, this application provides a liquid cooling system for power equipment. The power equipment includes multiple coolant channels, and the liquid cooling system includes a pressure pump and a diverter valve. Multiple outlets of the diverter valve are connected to the inlets of the multiple coolant channels. The pressure pump delivers coolant to the inlets of the diverter valve through a circulation pipe. The circulation pipe also receives coolant flowing from the outlets of the multiple coolant channels. The liquid cooling system operates in two modes: a cooling mode and a cleaning mode. At least one outlet has a coolant pressure greater in the cleaning mode than in the cooling mode, wherein:

[0006] The diverter valve is used to adjust the opening of at least one outlet according to the operating mode of the liquid cooling system, wherein the opening of at least one outlet in the liquid cooling system operating in cleaning mode is different from the opening in the liquid cooling system operating in cooling mode; or, the pressure pump is used to adjust the speed according to the operating mode of the liquid cooling system, wherein the speed of the pressure pump in the liquid cooling system operating in cleaning mode is different from the speed in the liquid cooling system operating in cooling mode.

[0007] The liquid cooling system of this application delivers coolant to each coolant channel of the power equipment through circulation pipes, and then receives coolant flowing out of each coolant channel through the same circulation pipes, forming a circulation path that continuously supplies coolant to the power equipment. The liquid cooling system also provides power to the coolant in the circulation pipes through a pressure pump, and connects each coolant channel through a diversion valve to ensure the circulation of coolant within the liquid cooling system.

[0008] The liquid cooling system of this application also achieves different functions by setting different operating modes. In cooling mode, the liquid cooling system can use coolant to provide cooling and lubrication for the power equipment; while in cleaning mode, the liquid cooling system can use coolant to clean at least one coolant channel. At this time, the coolant pressure at the outlet of the diverter valve connected to the cleaned coolant channel is greater than the coolant pressure at that outlet when it is in cooling mode.

[0009] Specifically, the liquid cooling system of this application adjusts the cooling hydraulic pressure at the corresponding outlet by adjusting the opening of the diverter valve or the speed of the pressure pump. Because the liquid cooling system of this application utilizes the inherent components of the power equipment and circulation pipeline to achieve a self-cleaning effect, there is no need to add a dedicated cleaning component to the power equipment, thus controlling the size of the liquid cooling system and saving interior space in the vehicle.

[0010] In one possible implementation, the power unit includes an electric motor, multiple coolant passages include an electric motor coolant passage disposed inside the electric motor, and multiple outlets of the diverter valve include an electric motor outlet. The diverter valve is used for:

[0011] Adjust the opening of the motor outlet according to the operating mode of the liquid cooling system; or, adjust the opening of at least one outlet other than the motor outlet among multiple outlets according to the operating mode of the liquid cooling system.

[0012] In this implementation, the flow divider valve can be adjusted to increase the opening of the motor outlet, thereby increasing the pressure of coolant flowing into the motor coolant channel from the motor outlet and thus cleaning the motor coolant channel. Alternatively, the flow divider valve can be adjusted to decrease the opening of at least one outlet other than the motor outlet, which also increases the pressure of coolant flowing into the motor outlet. Both adjustment methods can achieve the effect of cleaning the motor coolant channel.

[0013] In one possible implementation, the power unit includes a reducer, multiple coolant passages including a reducer coolant passage disposed inside the reducer, and multiple outlets of a flow divider valve including a reducer outlet. The reducer outlet is used to transfer coolant to the reducer coolant passages, and the flow divider valve is used for:

[0014] Adjust the opening of the reducer outlet according to the operating mode of the liquid cooling system; or, adjust the opening of at least one outlet other than the reducer outlet among multiple outlets according to the operating mode of the liquid cooling system.

[0015] In this implementation, the flow divider valve can be adjusted to increase the opening of the reducer outlet, allowing more coolant to flow into the reducer coolant passage, thus cleaning the reducer coolant passage. Alternatively, the flow divider valve can be adjusted to decrease the opening of at least one outlet other than the reducer outlet, also allowing more coolant to flow into the reducer outlet. Both adjustment methods can achieve the effect of cleaning the reducer coolant passage.

[0016] In one possible implementation, the multiple coolant passages include a gear coolant passage and a bearing coolant passage disposed inside the reducer. At least one outlet of a diverter valve is used to connect the gear coolant passage and the bearing coolant passage via a secondary diverter valve. The secondary diverter valve includes a gear outlet and a bearing outlet. The gear outlet is used to transfer coolant to the gear coolant passage, and the bearing outlet is used to transfer coolant to the bearing coolant passage. The secondary diverter valve is used for:

[0017] Adjust the opening of the gear outlet according to the operating mode of the liquid cooling system; or, adjust the opening of the bearing outlet according to the operating mode of the liquid cooling system.

[0018] In this implementation, for scenarios with a large number of coolant channels in the power equipment, the liquid cooling system can deliver coolant to multiple coolant channels by setting up multiple diverter valves and connecting them in stages. At a secondary diverter valve, two coolant channels can be connected separately. By adjusting the opening ratio between the two outlets, the cleaning function of the two coolant channels can be achieved.

[0019] In one possible implementation, the multiple coolant passages include gear coolant passages and bearing coolant passages located inside the power equipment. The multiple outlets of the diverter valve include gear outlets and bearing outlets. The gear outlets are used to transfer coolant to the gear coolant passages, and the bearing outlets are used to transfer coolant to the bearing coolant passages. The diverter valve is used for:

[0020] Adjust the opening degree of the gear outlet and bearing outlet according to the operating mode of the liquid cooling system; or, adjust the opening degree of at least one outlet other than the gear outlet and bearing outlet among the multiple outlets according to the operating mode of the liquid cooling system.

[0021] In this implementation, when two coolant channels need to be cleaned, the opening of both outlets can be adjusted simultaneously, or the opening of at least one outlet other than the two outlets can be adjusted to achieve the cleaning function of both coolant channels. It is understandable that a similar method can be used when more than two coolant channels need to be cleaned.

[0022] In one possible implementation, in response to the liquid cooling system operating in clean mode, a diverter valve is used to adjust the opening of at least one outlet, and the pressure pump adjusts its speed, such that the coolant pressure at the at least one outlet in the liquid cooling system operating in clean mode is greater than the coolant pressure in the liquid cooling system operating in cool mode.

[0023] In this implementation, increasing the speed of the pressure pump increases the coolant pressure at each outlet of the diverter valve. This method also enables the coolant passages to self-clean.

[0024] In one possible implementation, the liquid cooling system also includes a heat exchanger for heat exchange and cooling of the coolant. In response to the liquid cooling system operating in a clean mode, the heat exchanger is used to adjust the heat exchange power of the coolant to adjust the coolant temperature at the outlet of the diverter valve.

[0025] In this implementation, by controlling the heat exchange power of the heat exchanger, the temperature of the coolant can be adjusted. Thus, when the liquid cooling system is working in cleaning mode, the temperature of the coolant flowing into the coolant channel can be increased to enhance the coolant's ability to dissolve impurities and improve the self-cleaning effect.

[0026] Secondly, this application provides a controller for controlling a liquid cooling system of power equipment. The power equipment includes multiple coolant channels, and the liquid cooling system includes a pressure pump and a diverter valve. Multiple outlets of the diverter valve are connected to the inlets of the multiple coolant channels. The pressure pump delivers coolant to the inlets of the diverter valve through a circulation pipe. The circulation pipe also receives coolant flowing from the outlets of the multiple coolant channels. The liquid cooling system operates in two modes: a cooling mode and a cleaning mode. The controller is used for:

[0027] Depending on the operating mode of the liquid cooling system, control the flow divider valve to adjust the opening of at least one outlet, or control the pressure pump to adjust its speed.

[0028] The controller provided in the second aspect of this application can be used to switch the operating modes of the aforementioned liquid cooling system. Specifically, upon receiving a corresponding signal, it controls the opening of the outlet in the diverter valve or the speed of the pressure pump to clean at least one coolant passage. This controller also utilizes the inherent components of the power unit and circulation pipes to achieve a self-cleaning effect, eliminating the need for a dedicated cleaning component within the power unit. This allows for control over the size of both the power unit and the liquid cooling system, saving interior space in the vehicle.

[0029] In one possible implementation, the power unit includes an electric motor, multiple coolant channels include a motor coolant channel disposed inside the motor, multiple outlets include a motor outlet for transferring coolant to the motor coolant channels, a cleaning mode includes a motor cleaning mode, and the controller is used for:

[0030] In response to the liquid cooling system operating in motor cleaning mode, the control valve adjusts the opening of the motor outlet; or the opening of at least one outlet other than the motor outlet among multiple outlets.

[0031] In this implementation, the controller responds to the motor cleaning mode by increasing the opening of the motor outlet or decreasing the opening of at least one outlet other than the motor outlet, so that the coolant flows into the motor coolant channel from the motor outlet at a greater pressure, thereby cleaning the motor coolant channel.

[0032] In one possible implementation, the power unit includes a reducer, multiple coolant passages include a reducer coolant passage disposed inside the reducer, multiple outlets of the flow divider valve include a reducer outlet, the reducer outlet being used to transfer coolant to the reducer coolant passages, and the controller being used for:

[0033] In response to the liquid cooling system operating in clean mode, the control valve adjusts the opening of the motor outlet and the reducer outlet; or adjusts the opening of at least one outlet other than the motor outlet and the reducer outlet among multiple outlets.

[0034] In this implementation, the controller responds to the cleaning mode by increasing the opening of the motor outlet and the reducer outlet, or decreasing the opening of at least one outlet other than the motor outlet and the reducer outlet, so that more coolant flows from the motor outlet and the reducer outlet into the motor coolant channel and the reducer coolant channel respectively, thereby cleaning the motor coolant channel and the reducer coolant channel.

[0035] In one possible implementation, the power unit includes gears and bearings; multiple coolant channels include a gear coolant channel and a bearing coolant channel located inside the power unit; at least one outlet of a diverter valve is used to connect the gear coolant channel and the bearing coolant channel via a magnetic pole diverter valve; a secondary diverter valve includes a gear outlet and a bearing outlet, the gear outlet being used to transfer coolant to the gear coolant channel, and the bearing outlet being used to transfer coolant to the bearing coolant channel; cleaning modes include a gear cleaning mode and a bearing cleaning mode; and the controller is used for:

[0036] When the liquid cooling system is operating in gear cleaning mode, the flow divider valve is controlled to adjust the opening of the gear outlet or the bearing outlet; or when the liquid cooling system is operating in bearing cleaning mode, the flow divider valve is controlled to adjust the opening of the bearing outlet or the gear outlet.

[0037] In this implementation, for scenarios with a large number of coolant channels in the power equipment, the liquid cooling system can deliver coolant to multiple coolant channels by setting up multiple diversion valves and connecting them in stages. The controller can also respond to the operating status of the cleaning mode and control the secondary diversion valves to adjust the opening of the outlet, thereby achieving the cleaning function of the coolant channels.

[0038] In one possible implementation, the multiple coolant channels include a gear coolant channel and a bearing coolant channel located inside the power equipment, and the multiple outlets include a gear outlet and a bearing outlet. The gear outlet is used to transfer coolant to the gear coolant channel, and the bearing outlet is used to transfer coolant to the bearing coolant channel. The diverter valve is used for:

[0039] In response to the liquid cooling system operating in clean mode, the control valve adjusts the opening of the motor outlet, the gear outlet, and the bearing outlet; or the opening of at least one outlet other than the motor outlet, gear outlet, and bearing outlet.

[0040] In this implementation, when the controller responds to the liquid cooling system operating in cleaning mode and cleans the three coolant channels, it can also simultaneously adjust the opening of the three outlets, or adjust the opening of at least one outlet other than the three outlets, so as to achieve the cleaning function of the three coolant channels.

[0041] In one possible implementation, the controller is also used for:

[0042] In response to the liquid cooling system operating in clean mode, the opening of at least one outlet in the diversion valve is adjusted, and the speed of the pressure pump is adjusted.

[0043] In this implementation, when the controller responds to the liquid cooling system operating in cleaning mode, it can also increase the speed of the pressure pump to increase the coolant pressure at each outlet of the diversion valve, thereby achieving the self-cleaning function of the coolant channel.

[0044] In one possible implementation, the controller is also used for:

[0045] In response to the liquid cooling system operating in clean mode, the heat exchanger is controlled to adjust the heat exchange power of the coolant, thereby adjusting the coolant temperature at the outlet of the diversion valve.

[0046] In one possible implementation, the controller actively or passively responds to the liquid cooling system operating in a clean mode.

[0047] In this implementation, the control method for the liquid cooling system can be set differently depending on the form of the commands received by the controller. When the controller responds with an active cleaning mode command (such as receiving a user command), the power unit can perform self-cleaning under the user's command; while when the controller responds with a passive cleaning mode command (such as detecting an excess of a preset time or abnormal pressure in the coolant passage), the power unit can perform self-cleaning under preset trigger conditions. The controller's control method is relatively flexible in this implementation.

[0048] Thirdly, this application provides a power device, including an electric motor, a transmission, and the liquid cooling system provided in the first aspect of this application, wherein the liquid cooling system is used to provide cooling and cleaning for the electric motor and the transmission; or...

[0049] The power equipment includes an electric motor, a transmission, and a liquid cooling system. The liquid cooling system is used to provide cooling and cleaning for the electric motor and the transmission. The liquid cooling system includes a pressure pump, a flow divider valve, and a controller provided in the second aspect of this application. The controller controls at least one of the pressure pump and the flow divider valve according to the operating mode of the liquid cooling system.

[0050] Fourthly, this application also provides a vehicle, including wheels and a power device provided in the third aspect of this application, the power device being used to drive the wheels to rotate.

[0051] Understandably, the power equipment provided in the third aspect of this application, by employing the liquid cooling system provided in the first aspect or a liquid cooling system controlled by the controller provided in the second aspect, possesses a self-cleaning function, which can prevent defects caused by the accumulation of impurities and extend the service life of the power equipment. Simultaneously, the power equipment utilizes the components of the circulation pipe itself to achieve a self-cleaning effect, eliminating the need for a dedicated cleaning component within the power equipment, thus controlling its size. The vehicle provided in the fourth aspect of this application, while improving reliability, also saves internal space. Attached Figure Description

[0052] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0053] Figure 1 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application;

[0054] Figure 2 This is a schematic diagram of the frame structure of a power unit in a vehicle provided in an embodiment of this application;

[0055] Figure 3 This is a schematic diagram of the frame structure of a liquid cooling system in a power equipment according to an embodiment of this application;

[0056] Figure 4 This is a schematic diagram of the frame structure of a liquid cooling system in another power equipment provided in this application embodiment;

[0057] Figure 5 This is a schematic diagram of the frame structure of a liquid cooling system in a power equipment according to an embodiment of this application;

[0058] Figure 6 This is a schematic diagram of the frame structure of a liquid cooling system in a power equipment according to an embodiment of this application. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are merely some, and not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection claimed in this application.

[0060] Please see Figure 1 This is a schematic diagram of the structure of a vehicle 200 provided in an embodiment of this application.

[0061] The vehicle 200 provided in this application embodiment includes a body 201, wheels 202, and a power unit 100. The wheels 202 are rotatably connected to the body 201, and the power unit 100 is housed within the body 201. The power unit 100 is drive-connected to the wheels 202 and provides rotational power to the wheels 202, driving the vehicle 200 to move. The power unit 100 is the same as the power unit provided in this application.

[0062] exist Figure 1 In the illustration, the vehicle 200 may also include a battery module 203. The battery module 203 is also housed within the vehicle body 201, and is electrically connected to the power equipment 100. The battery module 203 can serve as a power source to provide power to the power equipment 100.

[0063] Please see Figure 2 The diagram shows a frame structure of a power equipment 100 provided in an embodiment of this application.

[0064] The power equipment 100 of this application includes a motor 10, a reducer 20, a liquid cooling system 30, multiple coolant channels, and a controller 50. The motor 10 and reducer 20 are connected in a transmission relationship. The motor 10 outputs power, and the reducer 20 adjusts the rotational speed and transmits the power output by the motor 10 to the wheels 202 at a preset speed. Coolant circulates within the coolant channels and the liquid cooling system 30 to provide cooling for the motor 10 and reducer 20. In some embodiments, the coolant may also be oil, which further lubricates the reducer 20. It is understood that the liquid cooling system 30 is the liquid cooling system provided in this application, and the controller 50 is the controller provided in this application.

[0065] Specifically, in Figure 2 In the diagram, the coolant channels include a motor coolant channel 41 and a reducer coolant channel 42. The motor coolant channel 41 is located inside the motor 10 and is positioned to correspond to the area within the motor 10 that requires heat dissipation. This allows the coolant to exchange heat with the area requiring heat dissipation as it flows through the motor 10 via the motor coolant channel 41, thereby carrying away the heat generated during the operation of the motor 10. The heated coolant can then flow out of the motor coolant channel 41.

[0066] Understandably, when multiple areas within the motor 10 require heat dissipation, the motor coolant channel 41 can also be configured to correspond to multiple areas and achieve the function of dissipating heat from multiple areas. Specifically, the motor coolant channel 41 can flow through multiple areas sequentially to dissipate heat from multiple areas sequentially; in other embodiments, the motor coolant channel 41 can also be divided into multiple sub-coolant channels (not shown in the figure), with each sub-coolant channel connected in parallel, and each sub-coolant channel flowing through at least one area. The multiple sub-coolant channels cover each area within the motor 10 that requires heat dissipation, thereby forming a function where coolant flows through the motor 10 and cools each area within the motor 10.

[0067] The coolant passage 42 is located inside the reducer 20 and is used to provide cooling (and lubrication) for the reducer 20. The reducer 20 is a mechanical transmission structure, which needs to rotate at high speed during the operation of the power equipment 100 to transmit the power provided by the motor 10 to one end of the wheel 202. Therefore, during operation, the reducer 20 needs a continuous supply of coolant for cooling and lubrication to reduce the heat and friction generated during high-speed rotation.

[0068] Please refer to the above. Figure 3 The diagram shows the frame structure of the liquid cooling system 30 in the power equipment 100 of this application.

[0069] exist Figure 3 In the illustrated embodiment, the liquid cooling system 30 of the power equipment 100 of this application includes a liquid supply pipe 31, a liquid collection tank 32, a pressure pump 33, and a diversion valve 34. The liquid supply pipe 31 and the liquid collection tank 32 are interconnected and form a circulation pipe for the liquid cooling system 30. One end of the circulation pipe near the liquid supply pipe 31 is connected to the inlet of the diversion valve 34. The diversion valve 34 also includes multiple outlets, each outlet connected to the inlet of a coolant passage. Figure 3 In the diagram, the supply pipe 31 is connected to the motor coolant passage 41 and the reducer coolant passage 42 via a diversion valve 34. The outlets of the diversion valve 34 include a motor outlet 341 connected to the motor coolant passage 41 and a reducer outlet 342 connected to the reducer coolant passage 42. The motor outlet 341 is used to supply coolant to the motor coolant passage 41, and the reducer outlet 342 is used to supply coolant to the reducer coolant passage 42.

[0070] The end of the circulation pipe near the collection tank 32 corresponds to the outlet of each coolant channel, used to receive the coolant flowing out of each channel. That is, the end of the motor coolant channel 41 furthest from the diverter valve 34 is connected to the collection tank 32, and the end of the reducer coolant channel 42 furthest from the diverter valve 34 is also connected to the collection tank 32. Thus, the liquid cooling system 30 forms a flow path from the collection tank 32 - supply pipe 31 - motor coolant channel 41 and reducer coolant channel 42 - collection tank 32, with the coolant circulating between the liquid cooling system 30 and the coolant channels.

[0071] The pressure pump 33 is installed on the circulation pipe of the liquid cooling system 30 to provide power for the circulation of the coolant. Figure 3In the diagram, pressure pump 33 is located at the supply pipe 31. Pressure pump 33 is used to draw coolant from the collection tank 32 into the supply pipe 31, pressurize the coolant, and then deliver it through the diversion valve 34 to the motor coolant channel 41 and / or the reducer coolant channel 42. The coolant then flows into the collection tank 32 through the motor coolant channel 41 and / or the reducer coolant channel 42, respectively.

[0072] Pressure pump 33 delivers coolant into the reducer coolant passage 42 via flow divider valve 34, thus pressurizing the coolant in the reducer coolant passage 42. The reducer coolant passage 42 can also be equipped with nozzles to spray coolant into the reducer 20 from the side, thereby achieving cooling and lubrication. Because the reducer 20 contains high-speed moving mechanisms, the coolant passage 42 uses a spray method to supply coolant to the reducer 20, preventing interference with the internal movements of the reducer 20 and ensuring reliable operation.

[0073] Understandably, when multiple locations within the reducer 20 require cooling and lubrication, the nozzle structure in the reducer coolant channel 42 can be multiple, with the nozzles connected in series or parallel. Each nozzle is used to provide coolant to at least one location. The multiple nozzles cover the various locations within the reducer 20 requiring lubrication, thus forming the cooling and lubrication function of the reducer coolant channel 42 for the reducer 20.

[0074] In some embodiments, some nozzles on the coolant passage 42 of the reducer may also have an oscillating function, which can oscillate within the reducer 20, thereby enabling the nozzles to supply coolant to two or more locations.

[0075] After the coolant flows through the coolant channel 42 to the lubrication point of the reducer 20, it flows downwards under gravity. At this time, the collection tank 32 in the liquid cooling system 30 can be positioned below the reducer 20 along the direction of gravity to collect the coolant flowing down from the reducer 20, allowing the collected coolant to continue flowing in the liquid cooling system 30 via the pressure pump 33. In some embodiments, a funnel, guide channel, or other structure can also be provided below the reducer 20 in the liquid cooling system 30 to assist the collection tank 32 in collecting the coolant.

[0076] The end of the motor coolant passage 41 away from the diverter valve 34 is also connected to the collection tank 32. In some embodiments, the end of the motor coolant passage 41 away from the diverter valve 34 can also be positioned above the collection tank 32 along the direction of gravity. In this case, after the coolant flows through the motor 10, it can flow into the collection tank 32 under the action of gravity and mix with the coolant flowing in from the reducer 20.

[0077] For the power equipment 100 of this application, the inlet of the diverter valve 34 is connected to the supply pipe 31. The diverter valve 34 needs to be set as an electrically controlled diverter valve, and the pressure pump 33 also needs to be set as an electrically controlled pressure pump. The controller 50 is electrically connected to the diverter valve 34 and the pressure pump 33 respectively. The controller 50 is used to control the opening degree of each outlet in the diverter valve 34, and also to control the speed of the pressure pump 33.

[0078] The liquid cooling system 30 of this application has two operating modes: a cooling mode and a cleaning mode. The controller 50 can respond to commands and control the components within the liquid cooling system 30 when it is operating in either cooling or cleaning mode to ensure reliable operation. Specifically, based on received commands, the controller 50 controls the diversion valve 34 to adjust the opening of its outlet, or controls the pressure pump 33 to adjust its speed, so that the coolant pressure in the coolant passage corresponding to at least one outlet of the diversion valve 34 is greater in the cleaning mode than in the cooling mode, thereby achieving the switching of the operating mode of the liquid cooling system 30.

[0079] Understandably, when the power equipment 100 is operating normally, the liquid cooling system 30 can operate in cooling mode to provide cooling and lubrication for the power equipment 100. However, during the operation of the power equipment 100, due to the high-speed operation of various components and the complex driving conditions of the vehicle 200, debris may be generated due to mechanical friction between components, or external impurities may intrude due to poor sealing, forming numerous impurities inside the power equipment 100. These impurities, after entering the coolant, may be carried by the coolant circulation into the motor 10 or the reducer 20. Some impurities may also remain in the liquid cooling system 30, causing internal blockage. If these impurities are not cleaned for a long time, it may lead to poor heat dissipation of the motor 10, internal scratches in the reducer 20, and blockage of the liquid cooling system 30 and various coolant passages. Therefore, the liquid cooling system 30 of the power equipment 100 in this application, by setting a cleaning mode, can remove impurities when necessary, ensuring the reliable operation of the power equipment 100.

[0080] Take, for example, the motor coolant passage 41 located within the motor 10. Figure 3In the illustration, when the power equipment 100 needs to clean the motor coolant passage 41 within the motor 10, it can send a cleaning mode command to the controller 50. This cleaning mode command can be a motor cleaning mode command. The controller 50 responds to the motor cleaning mode command by controlling the diversion valve 34 to adjust the opening of the motor outlet 341, thereby increasing the opening of the motor outlet 341 and thus increasing the pressure of the coolant flowing into the motor coolant passage 41. Understandably, during normal operation of the power equipment 100, the coolant supplied to the motor coolant passage 41 through the motor outlet 341 has a working pressure, which can be defined as the motor working pressure V01. When cleaning the motor coolant passage 41, the coolant supplied to the motor coolant passage 41 through the motor outlet 341 can be defined as having a motor cleaning pressure V1, and this motor cleaning pressure V1 is higher than the motor working pressure V01. Therefore, when there are impurities in the motor coolant passage 41, if the motor working pressure V01 cannot remove the impurities, a higher motor cleaning pressure V1 can be used to remove the impurities during the self-cleaning process.

[0081] Understandably, higher pressure ensures that the coolant flows through the motor coolant channel 41 at a faster rate, thereby creating a stronger flushing effect on impurities within the motor coolant channel 41. By maintaining the motor cleaning pressure V1 for a certain period of time through the controller 50, higher pressure and flow rate can be used to clean the motor coolant channel 41 within that time, ensuring that high pressure and high flushing force act on the impurities for a sufficient period of time to achieve the purpose of thoroughly removing the impurities.

[0082] It should be noted that during normal operation, the motor operating pressure V01 of the power equipment 100 may fluctuate due to changes in the working environment. In this case, the motor operating pressure V01 can be set to the coolant pressure in the motor coolant channel 41 when the power equipment 100 operates at peak power. When the motor cleaning pressure V1 is greater than the pressure at that peak power, it ensures that the motor cleaning pressure V1 is always greater than the pressure in the motor coolant channel 41 when the power equipment 100 is operating, thus guaranteeing the self-cleaning effect of the power equipment 100.

[0083] In other embodiments, the motor operating pressure V01 can also be set to the pressure value in the motor coolant channel 41 when the power equipment 100 is operating at rated power. When the value of the motor cleaning pressure V1 is greater than the pressure value at rated power, the motor coolant channel 41 can be cleaned at a higher pressure to remove impurities.

[0084] In another embodiment, by controlling the diversion valve 34 through the controller 50, the opening of the reducer outlet 342 can be reduced, thereby indirectly increasing the coolant pressure at the motor outlet 341 and cleaning the motor coolant channel 41.

[0085] Understandable, Figure 3 In this embodiment, the diversion valve 34 includes two outlets—a motor outlet 341 and a reducer outlet 342. Increasing the opening of the motor outlet 341 or decreasing the opening of the reducer outlet 342 can adjust the flow ratio of coolant entering the motor coolant channel 41 and the reducer coolant channel 42. While maintaining a constant flow rate of coolant from the supply pipe 31 into the diversion valve 34, adjusting the difference in opening between the motor outlet 341 and the reducer outlet 342 can adjust the coolant pressure flowing out of the motor outlet 341.

[0086] Therefore, when cleaning the motor coolant passage 41 is required, the diverter valve 34 can adjust the opening of at least one outlet other than the motor outlet 341, in addition to adjusting the opening of the motor outlet 341. This will increase the coolant pressure within the motor coolant passage 41. Once the coolant pressure within the motor coolant passage 41 is increased from the motor operating pressure V01 to the motor cleaning pressure V1, a cleaning effect is achieved on the motor coolant passage 41.

[0087] In another embodiment, when the controller 50 responds to the operating mode of the liquid cooling system 30 as the motor cleaning mode, it can also control the pressure pump 33 to increase its speed, thereby increasing the pressure of the coolant flowing from the supply pipe 31 into the inlet of the diversion valve 34. This can also increase the pressure of the coolant flowing from the motor outlet 341 into the motor coolant channel 41, and create a cleaning effect on the motor coolant channel 41.

[0088] Based on any of the above settings, the motor coolant channel 41 can be cleaned within a certain time period based on the motor cleaning pressure V1, thereby achieving the purpose of removing impurities from the motor coolant channel 41.

[0089] Understandably, in some embodiments, the controller 50 can simultaneously control the diversion valve 34 to adjust the opening of the motor coolant outlet 341 and the opening of at least one other outlet besides the motor coolant outlet 341, to increase the coolant pressure in the motor coolant channel 41; or, in some embodiments, the controller 50 can simultaneously control the diversion valve 34 to adjust the opening of the outlet and control the pressure pump 33 to increase its speed, to increase the coolant pressure in the motor coolant channel 41. That is, any combination of the above methods can also achieve the effect of cleaning the motor coolant channel 41.

[0090] Based on a similar principle, when the power equipment 100 needs to clean the coolant passage 42 within the reducer 20, it can also send a cleaning mode command to the controller 50. This cleaning mode command can then be a reducer cleaning mode command. The controller 50 responds by operating the liquid cooling system 30 in reducer cleaning mode, correspondingly controlling the flow divider valve 34 to adjust the opening of the reducer outlet 342, thereby increasing the opening of the reducer outlet 342 and thus increasing the pressure of the coolant flowing into the reducer coolant passage 42.

[0091] Understandably, during normal operation of the power equipment 100, the coolant supplied to the coolant passage 42 from the reducer outlet 342 also has a working pressure, which can be defined as the reducer working pressure V02. When cleaning the coolant passage 42, the coolant supplied to the coolant passage 42 from the reducer outlet 342 has a reducer cleaning pressure V2, which is higher than the reducer working pressure V02. Therefore, when impurities are present in the coolant passage 42, if the reducer working pressure V02 cannot remove the impurities, a higher reducer cleaning pressure V2 can be used to remove them during the self-cleaning process.

[0092] Similarly, the reducer operating pressure V02 may fluctuate depending on changes in the working environment. In this case, the reducer operating pressure V02 can be set to the coolant pressure in the reducer coolant passage 42 when the power equipment 100 operates at peak power. In other embodiments, the reducer operating pressure V02 can also be set to the pressure in the reducer coolant passage 42 when the power equipment 100 operates at rated power. The reducer cleaning pressure V2 is adjusted accordingly based on the value of the reducer operating pressure V02, which will not be elaborated upon in this embodiment.

[0093] In one embodiment, the controller 50 can control the diversion valve 34 to reduce the opening of the motor outlet 341, thereby indirectly increasing the coolant pressure at the reducer outlet 342 and cleaning the coolant passage 42 of the reducer.

[0094] In one embodiment, when the liquid cooling system 30 is operating in the reducer cleaning mode, the controller 50 can also control the pressure pump 33 to increase its speed, thereby increasing the pressure of the coolant flowing from the supply pipe 31 into the inlet of the diverter valve 34. This can also increase the pressure of the coolant flowing from the reducer outlet 342 into the reducer coolant channel 42, and create a cleaning effect on the reducer coolant channel 42.

[0095] Based on any of the above settings, the reducer coolant passage 42 can be cleaned within a certain time period based on the reducer cleaning pressure V2, thereby achieving the purpose of removing impurities from the reducer coolant passage 42.

[0096] Understandably, in some embodiments, the controller 50 can also simultaneously control the diversion valve 34 to adjust the opening of the reducer outlet 342 and the opening of at least one other outlet besides the reducer outlet 342, to increase the coolant pressure in the reducer coolant passage 42; or, in some embodiments, the controller 50 can also simultaneously control the diversion valve 34 to adjust the outlet opening and control the pressure pump 33 to increase its speed, to increase the coolant pressure in the reducer coolant passage 42. That is, any combination of the above methods can also achieve the effect of cleaning the reducer coolant passage 42.

[0097] Therefore, in the cleaning mode, the liquid cooling system 30 of this application adjusts the opening of at least one outlet through the diversion valve 34 to make it different from the opening when operating in the cooling mode; or adjusts the speed of the pressure pump 33 to make it different from the speed when operating in the cooling mode, thereby making the pressure of the coolant at the outlet connected to the cleaned coolant channel greater than the coolant pressure when the outlet is in the cooling mode, and thus cleaning at least one coolant channel.

[0098] The controller 50 of this application also controls the opening of the liquid outlet by controlling the diversion valve 34, or controls the speed of the pressure pump 33 to adjust the operating mode of the liquid cooling system 30 between cleaning mode and cooling mode. When the power equipment 100 equipped with the liquid cooling system 30 of this application, or when at least one of the diversion valve 34 and pressure pump 33 of the liquid cooling system 30 in the power equipment is controlled by the aforementioned controller 50, the power equipment 100 provided by this application can have a self-cleaning function, and the service life of the power equipment 100 is also extended.

[0099] In existing power equipment, dedicated cleaning components are typically used to remove internal impurities. These components usually include dedicated fluid coolant channels and pressure pumps, which occupy internal space, increasing the size and complexity of the power equipment. Furthermore, these dedicated cleaning components cannot cover the entire internal area of ​​the power equipment, resulting in cleaning blind spots and preventing a complete cleaning effect. Additionally, because the dedicated fluid coolant channels are often left unused, the internal pipes are at risk of oxidation.

[0100] This application achieves a self-cleaning function in the power unit 100 without requiring a dedicated cleaning component. Due to this design, the power unit 100 of this application has a smaller size, simpler structure, better cleaning effect, and higher reliability compared to existing power units. The vehicle 200 equipped with the power unit 100 of this application also achieves higher reliability due to the self-cleaning function of the power unit 100, while simultaneously saving interior space in the vehicle 200.

[0101] It should be noted that some or all of the embodiments of the power device 100 in this application can be developed based on the existing structure of the power device 100. Therefore, the relevant control logic of the power device in this application can also be transmitted to the body control module (BCM) of the vehicle 200 or stored in the controller 50 of the power device 100 through over-the-air (OTA) technology or local transmission technology, so that the existing vehicle 200 can also have the same self-cleaning function as the power device 100 in this application through system upgrade.

[0102] Understandably, the liquid cooling system 30 of this application operates in cooling mode most of the time, and only in cleaning mode under certain circumstances. The controller 50 of this application also controls the diversion valve 34 and pressure pump 33 to operate in cooling mode most of the time. The power equipment 100 of this application needs to activate its self-cleaning function when a trigger condition is detected. Furthermore, the power equipment 100 of this application can also be controlled to perform self-cleaning operations by pre-setting trigger conditions to remove impurities when necessary, ensuring the reliable operation of the power equipment 100. The following describes three possible trigger conditions in detail:

[0103] 1. Receiving User Commands – This can be understood as the power unit 100 activating its self-cleaning function based on the user's active control. After driving the vehicle 200 for a certain period, the user can actively control the power unit 100 to activate the self-cleaning function based on their own judgment. This self-judgment does not require a specific time period or triggering event; the user only needs to actively control the power unit 100 to activate the self-cleaning function when they deem it necessary. The vehicle 200 provided in this application can inform the user of the recommended self-cleaning frequency upon delivery. The user can also independently adjust the self-cleaning frequency of the power unit 100 based on reference factors such as the environment, weather, and temperature in which the vehicle 200 is driven.

[0104] Under these triggering conditions, user commands can be input via either the vehicle body controller or the controller 50 of the power unit 100; this application does not impose any particular limitation on either method. Alternatively, user commands can be input via buttons, touchscreens, or other operations on the vehicle 200, or via a communication connection between the user terminal and the vehicle 200. This application does not limit the method of user command input for the power unit 100. Users of the vehicle 200 can use any control method to input commands and activate the self-cleaning function of the power unit 100.

[0105] II. Detection of exceeding the preset time interval – This can be understood as the power unit 100 activating its self-cleaning function based on a preset time interval. This preset time interval can be set at the factory or during the use of the vehicle 200 based on user needs. The factory-preset time interval can be understood as the manufacturer's recommended self-cleaning frequency for the power unit 100; the time interval set based on user needs can be understood as the user adjusting the self-cleaning frequency of the power unit 100 according to factors such as the vehicle 200's operating environment, weather, and temperature.

[0106] At this point, although the initial intentions of both the detection of exceeding the preset time and the user's command input triggering conditions are similar—both aiming to activate the self-cleaning function to remove impurities after the power equipment 100 has been operating for a certain period—the detection of exceeding the preset time triggering condition is a passive triggering situation compared to the user's active control command. When the triggering condition includes detecting exceeding the preset time, it can save the user from the tedious operation of actively controlling the power equipment 100 to start self-cleaning at the preset self-cleaning frequency, and prevent the user from forgetting to start self-cleaning, which could lead to the accumulation of impurities inside the power equipment 100.

[0107] Third, abnormal pressure is detected in the liquid cooling system 30 or coolant passage of the power equipment 100. This can be understood as the power equipment 100 activating its self-cleaning function based on its own status monitoring when abnormal pressure occurs in the liquid cooling system 30 or coolant passage. As mentioned earlier, when there are many impurities in the power equipment 100, they may accumulate in the liquid cooling system 30 or coolant passage, causing blockage. In this case, the coolant pressure in the liquid cooling system 30 or coolant passage will become abnormal due to the blockage. This abnormality usually leads to insufficient heat dissipation of the motor 10 or insufficient coolant supply to the reducer 20, affecting the normal operation of the power equipment 100.

[0108] The power equipment 100 of this application can detect the occurrence of the abnormal phenomenon by monitoring the hydraulic pressure of its own cooling system, and use the abnormal phenomenon as a trigger condition to control the power equipment 100 to start the self-cleaning function to remove impurities in the power equipment 100, eliminate the blockage in the liquid cooling system 30, and restore the pressure of the liquid cooling system 30 and the coolant passage to normal, so as to ensure the reliable operation of the power equipment 100.

[0109] This triggering condition can be understood as follows: when the power unit 100 detects a specific abnormality (pressure abnormality), it passively triggers the self-cleaning function in order to eliminate the specific abnormality. During vehicle 200 operation, it is difficult for the user to detect the pressure abnormality inside the power unit 100, and this abnormality may occur within a preset time interval. If the abnormality is not cleared in time, impurities may accumulate in the power unit 100, increasing the difficulty of removing impurities during the next self-cleaning process. In severe cases, impurities may not be completely eliminated by the self-cleaning action.

[0110] The setting of this trigger condition can promptly initiate self-cleaning of the power equipment 100 when the pressure in the liquid cooling system 30 or the coolant channel is abnormal, thus preventing the abnormal phenomenon from accumulating further and affecting the subsequent self-cleaning effect.

[0111] It is understandable that the three triggering conditions described above can be used in combination to control the power equipment 100 in different demand scenarios, thereby issuing a cleaning mode command to the controller 50 of the power equipment 100 and activating the self-cleaning function of the power equipment 100. The three triggering conditions can complement each other to ensure the reliable operation of the power equipment 100. In other embodiments, when using the power equipment control method of this application, one or any two of the triggering conditions can be used in combination to control the self-cleaning activation of the power equipment 100. Because any of the above triggering conditions can achieve the effect of removing impurities from the power equipment 100 and ensuring the normal operation of the power equipment 100, the power equipment 100 controlled by the method of this application can improve its operational reliability.

[0112] Please refer to one embodiment. Figure 4In this embodiment, the reducer 20 of the power device 100 may include a gear 21 and a bearing 22. The gear 21 and the bearing 22 can be connected by a connecting shaft (not shown in the figure), with the bearing 22 fixed at both ends of the connecting shaft and the gear 21 located between the two bearings 22. The bearing 22 is used to position the connecting shaft and the gear 21, and to enable the two meshing gears 21 to perform a transmission speed change function. Typically, during the operation of the reducer 20, both the gear 21 and the bearing 22 are in a high-speed rotation state, and the cooling and lubrication of the reducer 20 by the reducer coolant passage 42 is mainly focused on the positions of the gear 21 and the bearing 22.

[0113] Therefore, in Figure 4 In the schematic diagram, the reducer coolant passage 42 may include a gear coolant passage 43 and a bearing coolant passage 44. The gear coolant passage 43 corresponds to the gear 21, and the bearing coolant passage 44 corresponds to the bearing 22. The reducer coolant passage 42, through the coolant in the gear coolant passage 43 and the bearing coolant passage 44 respectively, provides cooling and lubrication to the gear 21 and the bearing 22.

[0114] Correspondingly, in this embodiment, there are two diversion valves 34, one of which is a diversion valve 34 ( Figure 4 The inlet of the diverter valve 34A (illustrated in the diagram) is connected to the supply pipe 31. The diverter valve 34A has two outlets, one of which is the motor outlet 341, and the other outlet is connected to another diverter valve 34A (…). Figure 4 The diagram shows the inlet of the diverter valve 34B. This other diverter valve 34, being located at the rear end of the first diverter valve 34, is thus configured as a secondary diverter valve. When there are multiple coolant channels in the power unit 100, the number of outlets of a single diverter valve 34 may not be sufficient for connecting all the coolant channels one-to-one. Therefore, in this embodiment, by increasing the number of diverter valves 34, the inlet of each coolant channel can be connected to the outlet of a diverter valve 34.

[0115] Specifically Figure 4 In this embodiment, the secondary diversion valve 34 includes two outlets—a gear outlet 343 and a bearing outlet 344. The gear outlet 343 is connected to the inlet of the gear coolant channel 43, used to supply coolant to the gear coolant channel 43. The bearing outlet 344 is connected to the inlet of the bearing coolant channel 44, used to supply coolant to the bearing coolant channel 44. The controller 50 is electrically connected to both diversion valves 34 simultaneously to control each valve, allowing the two valves 34 to adjust the opening degrees of the motor outlet 341, the gear outlet 343, and the bearing outlet 344, respectively.

[0116] Therefore, when the liquid cooling system 30 is operating in cleaning mode, the controller 50 can control the diversion valve 34 to adjust the opening of the motor outlet 341, the gear outlet 343, and the bearing outlet 344 based on the received cleaning mode command. Specifically, when the cleaning mode command is a gear cleaning command, the controller 50 responds to the liquid cooling system 30 operating in that cleaning mode by controlling the secondary diversion valve 34. The controller 50 can control the secondary diversion valve 34 to increase the opening of the gear outlet 343 or decrease the opening of the bearing outlet 344, so as to increase the pressure of the coolant flowing out of the gear outlet 343 and achieve a cleaning effect on the gear coolant channel 43. When the cleaning mode command is the bearing cleaning command, the controller 50 responds to the liquid cooling system 30 operating in the cleaning mode and controls the secondary diversion valve 34. The controller 50 can control the secondary diversion valve 34 to increase the opening of the bearing outlet 344 or decrease the opening of the gear outlet 343, so as to increase the pressure of the coolant flowing out of the bearing outlet 344 and achieve a cleaning effect on the bearing coolant channel 44.

[0117] Please refer to one embodiment. Figure 5 In this embodiment, the reducer 20 of the power equipment 100 also includes a gear 21 and a bearing 22, and the reducer coolant passage 42 includes a gear coolant passage 43 and a bearing coolant passage 44. Furthermore, in this embodiment, there is one diverter valve 34, and the number of outlets of the diverter valve 34 is multiple (three in this embodiment), specifically including a motor outlet 341, a gear outlet 343, and a bearing outlet 344. The controller 50 is electrically connected to the diverter valve 34 to control the opening degree of the diverter valve 34 to the motor outlet 341, the gear outlet 343, and the bearing outlet 344.

[0118] Therefore, when the liquid cooling system 30 is operating in the cleaning mode, the controller 50 can control the diversion valve 34 to adjust the opening of the motor outlet 341, the gear outlet 343, and the bearing outlet 344 based on the received cleaning mode command. When the cleaning mode command is a motor cleaning command, the controller 50 responds to the liquid cooling system 30 operating in this cleaning mode by controlling the diversion valve 34 to increase the opening of the motor outlet 341, or to simultaneously decrease the opening of the gear outlet 343 and the bearing outlet 344, so that the pressure of the coolant flowing out of the motor outlet 341 increases, thereby cleaning the motor coolant channel 41. When the cleaning mode command is a reducer cleaning command, the controller 50 responds to the liquid cooling system 30 operating in this cleaning mode by controlling the diversion valve 34 to simultaneously increase the opening of the gear outlet 343 and the bearing outlet 344, or to decrease the opening of the motor outlet 341, so that the pressure of the coolant flowing out of the gear outlet 343 and the bearing outlet 344 both increase, thereby cleaning the reducer coolant channel 42.

[0119] Furthermore, when the cleaning mode command is a gear cleaning command, the controller 50 responds to the liquid cooling system 30 operating in this cleaning mode by controlling the diversion valve 34 to increase the opening of the gear outlet 343, or simultaneously decrease the opening of the motor outlet 341 and the bearing outlet 344, so as to increase the pressure of the coolant flowing out of the gear outlet 343, thereby creating a cleaning effect on the gear coolant channel 43; when the cleaning mode command is a bearing cleaning command, the controller 50 responds to the liquid cooling system 30 operating in this cleaning mode by controlling the diversion valve 34 to increase the opening of the bearing outlet 344, or decrease the opening of the motor outlet 341 and the gear outlet 343, so as to increase the pressure of the coolant flowing out of the bearing outlet 344, thereby creating a cleaning effect on the bearing coolant channel 44.

[0120] It is understandable that in this embodiment, when there are multiple outlets of the diversion valve 34, the liquid cooling system 30 can form different combinations of cleaning modes. Furthermore, in conjunction with the controller 50's control of the pressure pump 33, the speed of the pressure pump 33 can be adjusted to achieve the effect of cleaning at least one coolant channel.

[0121] The embodiment of increasing the speed of pressure pump 33 corresponds to a scenario where the controller 50 responds to the liquid cooling system 30 operating in cleaning mode, requiring simultaneous cleaning of the motor coolant channel 41, gear coolant channel 43, and bearing coolant channel 44. In this case, the controller 50 increases the speed of pressure pump 33, thereby simultaneously increasing the coolant pressure at the motor outlet 341, gear outlet 343, and bearing outlet 344.

[0122] In other embodiments, when there are more than three outlets in the diversion valve 34, the opening of at least one outlet other than the motor outlet 341, gear outlet 343, and bearing outlet 344 can be reduced, which can also achieve the effect of simultaneously increasing the coolant pressure at the motor outlet 341, gear outlet 343, and bearing outlet 344.

[0123] It should be noted that in some embodiments, the power device 100 may include a motor 10, a gear 21, and a bearing 22. That is, in this embodiment, there is no separate structure for a reducer 20. In this case, the motor 10 can directly output power to the rear end (wheel 202) through the cooperation of the gear 21 and the bearing 22. In this case, the power device 100 may be provided with a motor coolant channel 41, a gear coolant channel 43, and a bearing coolant channel 44. The outlet of the diverter valve 34 includes a motor outlet 341, a gear outlet 343, and a bearing outlet 344. The motor outlet 341 is used to supply coolant to the motor coolant channel 41, the gear outlet 343 is used to supply coolant to the gear coolant channel 43, and the bearing outlet 344 is used to supply coolant to the bearing coolant channel 44. In this embodiment, the controller 50's control of the liquid cooling system 30 can also be based on the embodiments of the various power devices 100 described above, and does not affect the cleaning effect of the liquid cooling system 30 on each coolant channel when the power device 100 in this embodiment is running in cleaning mode.

[0124] Please refer to one embodiment. Figure 6 Furthermore, a heat exchanger 35 can be installed in the liquid cooling system 30 of the power equipment 100 of this application. The heat exchanger 35 can be located on the liquid supply pipe 31 and is used to cool the coolant. As mentioned above, after the coolant exchanges heat in components such as the motor 10 and the reducer 20, its temperature will rise when it flows back to the collection tank 32. Before the coolant with increased temperature re-enters the motor coolant channel 41 and the reducer coolant channel, it can be cooled by the heat exchanger 35 to ensure that the temperature of the coolant entering the motor coolant channel 41 and the reducer coolant channel 42 meets the heat dissipation requirements.

[0125] The heat exchanger 35 can dissipate heat from the coolant through heat exchange, including but not limited to air cooling and water cooling. Figure 6 In the illustration, heat exchanger 35 is connected between pressure pump 33 and diverter valve 34. In other embodiments, heat exchanger 35 may also be connected between pressure pump 33 and collection tank 32.

[0126] The controller 50 in the power equipment 100 of this application can be further electrically connected to the heat exchanger 35, and when the liquid cooling system 30 is running in clean mode, it controls the heat exchange power of the heat exchanger 35 to the coolant, thereby adjusting the temperature of the coolant flowing out of the outlet of the diversion valve 34.

[0127] Specifically, in this embodiment, when the controller 50 controls the heat exchange power of the heat exchanger 35 to decrease, the temperature of the coolant flowing into each coolant channel from the outlet of the diversion valve 34 also increases accordingly. Coolant at higher temperatures has a relatively stronger dissolving capacity; for some soluble impurities, controlling the coolant to clean them at a higher temperature may achieve a better cleaning effect.

[0128] exist Figure 6 In the illustrated embodiment, the liquid cooling system 30 may further include a filter 36. The filter 36 is located between the collection tank 32 and the pressure pump 33 and is used to filter impurities in the coolant. It is understood that after cleaning the motor coolant passage 41 and / or the reducer coolant passage 42, impurities will enter the collection tank 32 with the flow of coolant. Because the filter 36 is located between the collection tank 32 and the pressure pump 33, it can retain impurities on one side of the collection tank 32, ensuring that the coolant flowing towards the pressure pump 33 contains no impurities or only a small amount of impurities. This prevents the removed impurities from further returning to the motor coolant passage 41 or the reducer coolant passage 42 via the diversion valve 34, causing a cycle of impurity accumulation.

[0129] exist Figure 6 In the illustration, the power equipment 100 may also be equipped with a pressure sensor 60. The pressure sensor 60 can be used to monitor the real-time pressure of the liquid cooling system 30 and each coolant passage, and when an abnormality in the real-time pressure is detected, it generates a cleaning mode command and transmits it to the controller 50, thereby activating the self-cleaning function of the power equipment 100 of this application.

[0130] exist Figure 6 In the illustration, there are two pressure sensors 60, which are respectively installed on the motor coolant channel 41 and the reducer coolant channel 42. It can be understood that the two pressure sensors 60 can be used to monitor the real-time pressure of the motor coolant channel 41 and the reducer coolant channel 42. In one embodiment, the two pressure sensors 60 can also be located at the rear end of the motor coolant channel 41 and the reducer coolant channel 42 to achieve better monitoring results.

[0131] Specifically, in the embodiment with two pressure sensors 60, when an abnormal pressure is detected in the motor coolant channel 41, a motor cleaning mode command can be generated and transmitted to the controller 50 to clean the motor coolant channel 41. The abnormal pressure in the motor coolant channel 41 is usually caused by impurities clogging the channel, hindering coolant flow. The liquid cooling system 30 can eliminate this abnormal pressure by specifically cleaning the motor coolant channel 41. At this time, the reducer coolant channel 42 may be operating normally and does not require cleaning, thus saving the liquid cooling system 30 the trouble of cleaning all coolant channels when an abnormal pressure is detected, reducing the energy consumption of the power equipment 100.

[0132] Conversely, when the pressure in the reducer coolant passage 42 is abnormal, a reducer cleaning mode command can be generated. The liquid cooling system 30 will only clean the reducer coolant passage 42 without cleaning the motor coolant passage 41. This can also remove impurities from the reducer coolant passage 42 and reduce energy consumption.

[0133] In other embodiments, when the number of coolant channels in the liquid cooling system 30 exceeds two, pressure sensors 60 can be installed on each coolant channel to monitor the pressure of each channel individually. If the pressure in an individual coolant channel is abnormal, the channel can be individually cleaned using the cooperation of the pressure pump 33 and the diverter valve 34. For example, when the reducer coolant channel 42 also includes a gear coolant channel 43 and a bearing coolant channel 44, pressure sensors 60 can be installed on both channels to monitor their pressures. If an abnormal pressure occurs in either channel, the channel can be individually cleaned to ensure that the overall pressure of the liquid cooling system 30 remains normal.

[0134] It should be noted that, in the scenario described above where the trigger condition is the detection of abnormal pressure in the liquid cooling system 30 and the coolant passage, if the pressure in the liquid cooling system 30 or the coolant passage remains abnormal after the self-cleaning operation, the power device 100 of this application can perform a second cleaning of the abnormally pressurized coolant passage based on the same trigger condition to further remove impurities from the abnormally pressurized coolant passage until the pressure in the liquid cooling system 30 and the coolant passage returns to normal. The power device 100 of this application does not strictly limit the number of times the coolant passage is cleaned during the self-cleaning process.

[0135] Of course, the above-described embodiments can be applied individually or in combination. The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A liquid cooling system for power equipment, characterized in that, The power equipment includes multiple coolant channels, and the liquid cooling system includes a pressure pump and a diverter valve. Multiple outlets of the diverter valve are connected to the inlets of the multiple coolant channels. The pressure pump delivers coolant to the inlet of the diverter valve through a circulation pipe. The circulation pipe also receives coolant flowing out of the outlets of the multiple coolant channels. The liquid cooling system operates in two modes: a cooling mode and a cleaning mode. At least one outlet in the liquid cooling system operates at a higher coolant pressure in the cleaning mode than in the cooling mode. The diversion valve is used to adjust the opening degree of at least one of the liquid outlets according to the operating mode of the liquid cooling system, wherein the opening degree of the at least one liquid outlet in the liquid cooling system operating in the cleaning mode is different from the opening degree in the liquid cooling system operating in the cooling mode; or, The pressure pump is used to adjust its speed according to the operating mode of the liquid cooling system. The speed of the pressure pump in the liquid cooling system operating in the cleaning mode is different from the speed in the liquid cooling system operating in the cooling mode.

2. The liquid cooling system according to claim 1, characterized in that, The power equipment includes a motor, the plurality of coolant channels include a motor coolant channel disposed inside the motor, the plurality of outlets of the diversion valve include a motor outlet, and the diversion valve is used for: Adjust the opening of the motor's liquid outlet according to the operating mode of the liquid cooling system; or, Adjust the opening degree of at least one of the plurality of liquid outlets, excluding the motor liquid outlet, according to the operating mode of the liquid cooling system.

3. The liquid cooling system according to claim 1 or 2, characterized in that, The power equipment includes a reducer, the plurality of coolant channels include a reducer coolant channel disposed inside the reducer, the plurality of outlets of the diverter valve include a reducer outlet, the reducer outlet is used to transfer coolant to the reducer coolant channel, and the diverter valve is used for: Adjust the opening of the reducer's liquid outlet according to the operating mode of the liquid cooling system; or, Adjust the opening degree of at least one of the plurality of liquid outlets, excluding the reducer outlet, according to the operating mode of the liquid cooling system.

4. The liquid cooling system according to claim 3, characterized in that, The plurality of coolant channels include a bearing coolant channel and a gear coolant channel disposed inside the reducer. At least one outlet of the diverter valve is used to connect the bearing coolant channel and the gear coolant channel via a secondary diverter valve. The secondary diverter valve includes a gear outlet and a bearing outlet. The gear outlet is used to transfer coolant to the gear coolant channel, and the bearing outlet is used to transfer coolant to the bearing coolant channel. The secondary diverter valve is used for: Adjust the opening of the gear outlet according to the operating mode of the liquid cooling system; or, Adjust the opening degree of the bearing outlet according to the operating mode of the liquid cooling system.

5. The liquid cooling system according to claim 1 or 2, characterized in that, The plurality of coolant channels include gear coolant channels and bearing coolant channels disposed inside the power equipment. The plurality of outlets of the diverter valve include gear outlets and bearing outlets. The gear outlet is used to transfer coolant to the gear coolant channel, and the bearing outlet is used to transfer coolant to the bearing coolant channel. The diverter valve is used for: Adjust the opening degree of the gear outlet and the bearing outlet according to the operating mode of the liquid cooling system; or, Adjust the opening degree of at least one of the plurality of liquid outlets, excluding the gear outlet and the bearing outlet, according to the operating mode of the liquid cooling system.

6. The liquid cooling system according to any one of claims 1-5, characterized in that, In response to the liquid cooling system operating in clean mode, the diverter valve is used to adjust the opening of at least one of the liquid outlets, and the pressure pump adjusts its speed, such that the coolant pressure at the at least one liquid outlet in the liquid cooling system operating in clean mode is greater than the coolant pressure in the liquid cooling system operating in cool mode.

7. A controller for controlling a liquid cooling system of power equipment, characterized in that, The power equipment includes multiple coolant channels, and the liquid cooling system includes a pressure pump and a diverter valve. Multiple outlets of the diverter valve are connected to the inlets of the multiple coolant channels. The pressure pump supplies coolant to the inlets of the diverter valve via a circulation pipe. The circulation pipe also receives coolant flowing out of the outlets of the multiple coolant channels. The liquid cooling system operates in two modes: a cooling mode and a cleaning mode. The controller is used for: Depending on the operating mode of the liquid cooling system, the flow divider valve can be controlled to adjust the opening of at least one of the liquid outlets, or the pressure pump can be controlled to adjust its speed.

8. The controller according to claim 7, characterized in that, The power equipment includes a motor, the plurality of coolant channels include a motor coolant channel disposed inside the motor, the plurality of outlets include a motor outlet for transferring coolant to the motor coolant channel, the cleaning mode includes a motor cleaning mode, and the controller is used for: In response to the liquid cooling system operating in the motor cleaning mode, the flow divider valve is controlled to adjust the opening of the motor liquid outlet, or the opening of at least one of the multiple liquid outlets other than the motor liquid outlet.

9. The controller according to claim 8, characterized in that, The power equipment includes a reducer, the plurality of coolant channels include a reducer coolant channel disposed inside the reducer, the plurality of outlets of the flow divider valve include a reducer outlet, the reducer outlet is used to transfer coolant to the reducer coolant channel, and the controller is used for: In response to the liquid cooling system operating in clean mode, the flow divider valve is controlled to adjust the opening of the motor outlet and the reducer outlet, or the opening of at least one of the plurality of outlets other than the motor outlet and the reducer outlet.

10. The controller according to claim 8, characterized in that, The power equipment includes gears and bearings. The plurality of coolant channels include a gear coolant channel and a bearing coolant channel disposed within the power equipment. At least one outlet of the diverter valve is used to connect the gear coolant channel and the bearing coolant channel via a secondary diverter valve. The secondary diverter valve includes a gear outlet and a bearing outlet. The gear outlet is used to transfer coolant to the gear coolant channel, and the bearing outlet is used to transfer coolant to the bearing coolant channel. The cleaning modes include a gear cleaning mode and a bearing cleaning mode. The controller is used for: In response to the liquid cooling system operating in gear cleaning mode, the flow divider valve is controlled to adjust the opening of the gear outlet or the bearing outlet; or, In response to the liquid cooling system operating in bearing cleaning mode, the flow divider valve is controlled to adjust the opening of the bearing outlet or the gear outlet.

11. The controller according to claim 8, characterized in that, The power equipment includes gears and bearings. The plurality of coolant channels include a gear coolant channel and a bearing coolant channel located inside the power equipment. The plurality of outlets include a gear outlet for transferring coolant to the gear coolant channel, and a bearing outlet for transferring coolant to the bearing coolant channel. The diverter valve is used for: In response to the liquid cooling system operating in clean mode, the flow divider valve is controlled to adjust the opening of the motor liquid outlet, the gear liquid outlet, and the bearing liquid outlet; or the opening of at least one of the multiple liquid outlets other than the motor liquid outlet, the gear liquid outlet, and the bearing liquid outlet.

12. The controller according to any one of claims 7-11, characterized in that, The controller is also used for: In response to the liquid cooling system operating in clean mode, the flow divider valve is controlled to adjust the opening of at least one of the liquid outlets and the pressure pump is controlled to adjust its speed.

13. A power equipment, characterized in that, include: The electric motor, the transmission, and the liquid cooling system according to any one of claims 1-6, wherein the liquid cooling system is used to provide cooling and cleaning for the electric motor and the transmission; or, An electric motor, a transmission, and a liquid cooling system, the liquid cooling system being used to provide cooling and cleaning for the electric motor and the transmission, the liquid cooling system including a pressure pump, a flow divider valve, and a controller as described in any one of claims 7-12, the controller being used to control at least one of the pressure pump or the flow divider valve according to an operating mode of the liquid cooling system.

14. A vehicle, characterized in that, It includes wheels and the power device as described in claim 13, the power device being used to drive the wheels to rotate.

Images