Power plant and controller therefor, vehicle

Abstract

The application provides a power equipment, a controller thereof and a vehicle. The power equipment comprises a motor and a liquid cooling system. The motor comprises a cooling liquid passage. The liquid cooling system comprises a pressure pump and a circulating pipeline. The pressure pump is configured to deliver cooling liquid to an inlet of the cooling liquid passage through the circulating pipeline and receive cooling liquid flowing out of an outlet of the cooling liquid passage. At least one of the pressure pump or the motor adjusts a rotating speed according to at least one of a temperature of the cooling liquid or a temperature of the motor. The power equipment, the controller thereof and the vehicle of the application can adjust the rotating speed of the motor and / or the rotating speed of the pressure pump of the liquid cooling system, thereby adjusting the temperature of the cooling liquid in the liquid cooling system so that the water content in the cooling liquid is reduced by evaporation of water in the cooling liquid, and thus, the adverse phenomena such as reduction of lubrication effect of the cooling liquid and insulation failure in the motor can be avoided.

Description

Technical Field

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

[0002] During vehicle operation, factors such as weather and ambient humidity can cause water to mix with the powertrain coolant. High water content in the coolant may lead to reduced lubrication and insulation failure in the motor, thus affecting the lifespan and performance of the power equipment.

[0003] In the prior art, in order to remove water from the coolant, a special filter device is usually required for the powertrain, which increases the size of the power equipment and thus takes up space inside the vehicle. Summary of the Invention

[0004] This application provides a power unit and its controller, as well as a vehicle. The power unit utilizes a motor or liquid cooling system to increase the temperature of the coolant, thereby evaporating and dehumidifying the water in the coolant, thus eliminating the need for a dedicated filtration device, reducing the size of the power unit, and increasing the interior space of the vehicle. Specifically, this application includes the following technical solutions:

[0005] In a first aspect, this application provides a power device. The power device includes an electric motor and a liquid cooling system. The electric motor includes a coolant passage. The liquid cooling system includes a pressure pump and a circulation pipe. The pressure pump is used to deliver coolant to the inlet of the coolant passage through the circulation pipe and to receive coolant flowing out of the coolant passage. At least one of the pressure pump or the electric motor adjusts its rotational speed according to at least one of the coolant temperature or the electric motor temperature.

[0006] The power equipment of this application adjusts the temperature of the coolant in the liquid cooling system by adjusting the speed of the motor and / or the speed of the pressure pump in the liquid cooling system. By increasing the temperature of the coolant, water in the coolant evaporates, thereby reducing the water content in the coolant and avoiding adverse phenomena such as reduced lubrication effect of the coolant and failure of internal insulation of the motor.

[0007] In one possible implementation, the power unit reduces the speed of the pressure pump, thereby decreasing the coolant flow rate and increasing the coolant temperature. Alternatively, the power unit increases the speed of the motor, thereby increasing the motor's heat generation and increasing the coolant temperature.

[0008] Accordingly, the power equipment provided in this application embodiment achieves its dehumidification function by increasing the temperature of the coolant to evaporate the water in the coolant. Therefore, the power equipment provided in this application embodiment can avoid problems such as poor lubrication and poor insulation caused by excessive water content in the coolant, thereby improving its lifespan and performance. Furthermore, the power equipment provided in this application embodiment does not require a dedicated filter assembly, reducing the size of the power equipment.

[0009] In one possible implementation, the operating modes of the power equipment include a drive mode and a dehumidification mode, and the temperature of the coolant when the power equipment is operating in drive mode is lower than the temperature when the power equipment is operating in drive mode.

[0010] In one possible implementation, the power unit or liquid cooling system includes a coolant temperature sensor. The coolant temperature sensor is used to monitor the temperature of the coolant in real time.

[0011] In one possible implementation, the pressure pump reduces its speed in response to the coolant temperature being lower than a preset coolant temperature, thereby reducing the coolant flow rate.

[0012] In one possible implementation, the motor increases its speed in response to the coolant temperature being lower than a preset coolant temperature.

[0013] In one possible implementation, the preset coolant temperature is greater than or equal to 100 degrees Celsius. Presetting the coolant temperature to be greater than or equal to 100 degrees Celsius ensures that the temperature of the water in the coolant is greater than or equal to 100 degrees Celsius, thereby guaranteeing the evaporation of water from the coolant.

[0014] The power equipment provided in this application embodiment can not only increase the temperature of the coolant to evaporate the water in the coolant, but also detect the coolant temperature. In response to the coolant temperature being lower than a preset coolant temperature, the pressure pump of the power equipment reduces its speed or the motor of the power equipment increases its speed, thereby raising the coolant temperature to be equal to or greater than the preset coolant temperature, thus achieving rapid evaporation of water in the coolant of the power equipment and ensuring the dehumidification effect of the power equipment.

[0015] In one possible implementation, the power unit or motor includes a motor temperature sensor. The motor temperature sensor is used to monitor the motor temperature in real time.

[0016] In one possible implementation, the pressure pump increases its rotational speed in response to the motor temperature being greater than or equal to a preset motor temperature, thereby increasing the flow rate of the coolant.

[0017] In one possible implementation, the motor reduces its speed in response to the motor temperature being greater than or equal to a preset motor temperature, thereby ensuring reliable motor operation.

[0018] In one possible implementation, the temperature of the motor when the power equipment is operating in drive mode is lower than the temperature when the power equipment is operating in dehumidification mode.

[0019] In one possible implementation, the preset motor temperature is less than or equal to 150 degrees Celsius. Accordingly, a preset motor temperature of less than or equal to 150 degrees Celsius not only ensures reliable motor operation but also allows the coolant temperature to be greater than or equal to 100 degrees Celsius while taking into account motor power consumption.

[0020] The power equipment provided in this application embodiment can not only increase the temperature of the coolant to evaporate water in the coolant, but also detect the motor temperature. In response to the motor temperature being greater than or equal to a preset coolant temperature, the pressure pump of the power equipment increases its speed to increase the coolant flow rate, thereby enhancing the motor's heat dissipation effect, or the motor speed of the power equipment decreases to reduce the heat generated by the motor, thus preventing the motor temperature from becoming too high and affecting the reliable operation of the motor.

[0021] In one possible implementation, the motor reduces its speed in response to the coolant temperature being greater than or equal to a preset coolant temperature. Accordingly, the power equipment provided in this application embodiment not only ensures rapid evaporation of water in the coolant but also reduces the power consumption of the motor in heating the coolant.

[0022] In one possible implementation, the pressure pump increases its speed in response to the coolant temperature being lower than a preset coolant temperature and the motor temperature being greater than or equal to a preset motor temperature, thereby increasing the coolant flow rate and enhancing the motor's heat dissipation effect.

[0023] In one possible implementation, the motor reduces its speed in response to the coolant temperature being lower than a preset coolant temperature and the motor temperature being greater than or equal to a preset motor temperature, thereby reducing the heat generated by the motor and thus avoiding affecting the reliable operation of the motor.

[0024] The power equipment provided in this application embodiment can not only increase the temperature of the coolant to evaporate water in the coolant, but also detect the motor temperature and the coolant temperature. In response to a coolant temperature lower than a preset coolant temperature and a motor temperature greater than or equal to a preset motor temperature, the power equipment's pressure pump increases its speed and / or the power equipment's motor decreases its speed, thereby enhancing the motor's heat dissipation and reducing its heat generation, thus avoiding affecting the reliable operation of the motor.

[0025] In one possible implementation, the liquid cooling system cools the coolant via a heat exchanger. The heat exchanger's heat exchange power increases when the motor temperature is greater than or equal to a preset motor temperature. Conversely, the heat exchanger's heat exchange power decreases when the motor temperature is less than the preset motor temperature.

[0026] The power equipment provided in this application embodiment can not only increase the temperature of the coolant to evaporate the water in the coolant, but also cool the coolant through a heat exchanger when the motor temperature is greater than or equal to the preset motor temperature, so that the coolant temperature is equal to or greater than the preset coolant temperature and the motor temperature is less than the preset motor temperature, thereby ensuring that the coolant water in the power equipment evaporates quickly and avoiding affecting the reliable operation of the motor.

[0027] In one possible implementation, the heat exchanger includes a heat exchange pump used to control the flow rate of the external refrigerant within the heat exchanger, thereby controlling the heat exchange power of the heat exchanger to the coolant in the liquid cooling system. The heat exchanger controls its heat exchange power by controlling the rotational speed of the heat exchange pump.

[0028] In one possible implementation, the heat exchanger includes a heat exchange diversion valve and a refrigerant passage. The heat exchange outlet of the heat exchange diversion valve is connected to the refrigerant passage, and external refrigerant flows into the refrigerant passage through the heat exchange outlet to achieve heat exchange with the coolant in the liquid cooling system. The heat exchanger's heat exchange power is controlled by adjusting the opening degree of the heat exchange outlet.

[0029] In one possible implementation, the heat exchanger includes a bypass passage, with the bypass outlet of a heat exchange diversion valve connected to the bypass passage. External refrigerant flows into the bypass passage through the bypass outlet and then directly exits the heat exchanger. The heat exchanger controls the flow rate of external refrigerant between the refrigerant passage and the bypass passage by controlling the opening degree of the bypass outlet, or by controlling the opening degree of the heat exchange outlet, thereby controlling the heat exchanger's heat exchange power.

[0030] In one possible implementation, the power unit includes a housing. A vent valve is provided on the housing, and the power unit's circulation pipe includes a liquid collection tank disposed within the housing. The liquid collection tank is used to contain coolant, and at least one of the pressure pumps or motors adjusts its speed so that the temperature of the coolant in the liquid collection tank is higher than a preset coolant temperature, thereby discharging water vapor through the vent valve.

[0031] In one possible implementation, the vent valve incorporates an oil-water separation membrane. This membrane blocks coolant while allowing water molecules to pass through, thus preventing coolant leakage within the liquid cooling system. The membrane also prevents coolant evaporation from the internal cavity while ensuring that water vapor is expelled from the casing.

[0032] In one possible implementation, the power unit starts and operates in dehumidification mode when it receives a user command or detects a time interval greater than a preset interval.

[0033] In one possible implementation, the power unit includes a humidity sensor for sensing ambient humidity. When operating in dehumidification mode, the power unit adjusts the duration of operation in dehumidification mode based on the ambient humidity.

[0034] In this implementation, the moisture content in the coolant varies depending on the scenario. Due to environmental factors, the operating environment of the power equipment may be relatively dry, resulting in a relatively low moisture content in the coolant. In this case, the power equipment can appropriately shorten the duration of operation in dehumidification mode to save energy and protect the motor. Alternatively, the operating environment of the power equipment may be relatively humid. In this case, the power equipment can appropriately extend the duration of operation in dehumidification mode to ensure the evaporation of moisture from the coolant.

[0035] In one possible implementation, the power equipment also adjusts the preset interval based on the ambient humidity.

[0036] In this implementation, the rate of change of water content in the coolant varies depending on the scenario. When the operating environment of the power equipment is relatively dry, the preset interval can be appropriately extended to avoid the power equipment frequently operating in dehumidification mode. When the operating environment of the power equipment is relatively humid, the preset interval can be appropriately shortened to ensure that the power equipment operates in dehumidification mode in a timely manner and to avoid excessive water content in the coolant.

[0037] In one possible implementation, the power unit includes a memory for receiving and recording weather information of the area where the vehicle travels, and the power unit adjusts the preset interval based on the weather information.

[0038] Secondly, this application provides a controller for a power device, the power device including a motor and a liquid cooling system. The motor includes a coolant passage. The liquid cooling system includes a pressure pump and a circulation pipe. The pressure pump is used to deliver coolant to the inlet of the coolant passage through the circulation pipe and to receive coolant flowing out of the coolant passage. The controller is used to control the rotational speed of at least one of the pressure pump or the motor in response to a comparison between the coolant temperature and a preset coolant temperature.

[0039] Understandably, the controller for the power equipment provided in the second aspect of this application is also used to achieve the aforementioned dehumidification function of the power equipment. During the dehumidification process of the coolant, based on real-time detection of the coolant temperature and upon determining that the coolant temperature is lower than a preset coolant temperature, the controller can control the pressure pump to reduce its speed to decrease the coolant flow rate, thereby increasing the coolant temperature. Alternatively, the controller can control the motor to increase its speed to increase the motor's heat generation, thus increasing the coolant temperature. By increasing the coolant temperature, the controller causes water in the coolant to evaporate, thereby reducing the water content in the coolant and preventing adverse phenomena such as decreased lubrication effect of the coolant and internal insulation failure of the motor. In one possible implementation, the controller is used to respond to the coolant temperature being lower than a preset coolant temperature by controlling the pressure pump to reduce its speed or controlling the motor to increase its speed.

[0040] In one possible implementation, the controller is used to control the speed of the pressure pump to increase or the speed of the motor to decrease in response to the motor temperature being greater than or equal to a preset motor temperature.

[0041] In one possible implementation, the controller is used to control the speed of the pressure pump to increase and the speed of the motor to decrease in response to the coolant temperature being lower than a preset coolant temperature and the motor temperature being greater than or equal to a preset motor temperature.

[0042] In one possible implementation, the liquid cooling system cools the coolant via a heat exchanger. The controller, in response to the motor temperature being greater than or equal to a preset motor temperature, controls the heat exchanger's heat exchange power to increase.

[0043] Thirdly, this application provides a vehicle including wheels and a power device provided in the first aspect of this application, the power device being used to drive the wheels to rotate. Alternatively, the vehicle of this application includes wheels and a power device, the power device being used to drive the wheels to rotate, the power device including a motor, a liquid cooling system, and a controller provided in the second aspect of this application, the liquid cooling system including a pressure pump, and the controller being used to control at least one of the motor or the pressure pump according to the operating mode of the power device.

[0044] Understandably, the vehicle provided in the third aspect of this application, because it includes the power unit provided in the first aspect of this application, or the power unit is controlled by the controller provided in the second aspect of this application, enables the vehicle's power unit to have a dehumidification function, thereby reducing the water content in the coolant and preventing adverse phenomena such as reduced lubrication effect of the coolant and failure of internal insulation of the motor. In addition, the power unit omits a dedicated filter device, reduces the size of the power unit, and increases the interior space of the vehicle. Attached Figure Description

[0045] 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.

[0046] Figure 1 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application;

[0047] 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;

[0048] 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;

[0049] Figure 4 This is a schematic diagram of the specific structure of a power device provided in an embodiment of this application;

[0050] Figure 5 This is a schematic diagram illustrating the dehumidification effect of a power equipment at different preset coolant temperatures, provided in an embodiment of this application.

[0051] Figure 6 This is a schematic diagram of the frame structure of a liquid cooling system in another power equipment provided in this application embodiment;

[0052] Figure 7 This is a schematic diagram of the internal structure of a heat exchanger in a liquid cooling system of a power equipment, provided in an embodiment of this application.

[0053] Figure 8 This is a schematic diagram of the internal structure of a heat exchanger in a liquid cooling system of another power equipment provided in this application embodiment;

[0054] Figure 9 This is a schematic diagram of the internal structure of a heat exchanger in a liquid cooling system of a power equipment according to another embodiment of this application;

[0055] Figure 10 This is a schematic cross-sectional view of the internal structure of a vent valve in a power equipment provided in an embodiment of this application. Detailed Implementation

[0056] 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.

[0057] Please see Figure 1 This is a schematic diagram of the structure of a vehicle 200 provided in an embodiment of this application.

[0058] 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.

[0059] exist Figure 1In 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.

[0060] Please see Figure 2 The illustration shown is a schematic diagram of the frame structure of the power unit 100 in a vehicle 200 provided in an embodiment of this application.

[0061] The power equipment 100 of this application includes a motor 10 and a liquid cooling system 20. The motor 10 includes a coolant passage 11. The liquid cooling system 20 includes a pressure pump 21 and a circulation pipe 22. The outlet of the circulation pipe 22 is connected to the inlet of the coolant passage 11, and the inlet of the circulation pipe 22 is connected to the outlet of the coolant passage 11. The circulation pipe 22 and the coolant passage 11 form a circulating liquid flow path, and coolant flows within the circulation pipe 22 and the coolant passage 11.

[0062] The pressure pump 21 provides power to the coolant in the circulation pipe 22. The pump inlet of the pressure pump 21 is connected in series with the circulation pipe 22. The pressure pump 21 drives the coolant from the outlet of the circulation pipe 22 into the coolant channel 11, and then receives the coolant flowing out of the coolant channel 11 through the outlet of the circulation pipe 22, creating a circulation effect between the circulation pipe 22 and the coolant channel 11. The coolant can cool the motor 10 within the coolant channel 11, ensuring the reliable operation of the motor 10.

[0063] In this application, the motor 10 in the power equipment 100 can be used to output power. For example... Figure 2 As shown, the power equipment 100 includes a reducer 30. The reducer 30 can be used to adjust the speed and transmit the power output by the motor 10 to the wheel 202 at a preset speed. A reducer coolant passage 31 can also be provided inside the reducer 30, and the outlet of the circulation pipe 22 can also be connected to the inlet of the reducer coolant passage 31, and coolant can be supplied to the reducer coolant passage 31 simultaneously.

[0064] The reducer 30 is a mechanical transmission structure. During the operation of the power equipment 100, it needs to rotate at high speed to transmit the power provided by the motor 10 to one end of the wheel 202. Therefore, the reducer 30 can also be cooled by the coolant in the reducer coolant passage 31 during operation. In some embodiments, the coolant can also be oil, which can further lubricate the reducer 30. Understandably, the inlet of the circulation pipe 22 can also be used to receive the coolant flowing out of the reducer coolant passage 31, so as to create the effect of coolant circulating between the circulation pipe 22 and the reducer coolant passage 31.

[0065] The motor 10 includes a coolant channel 11. In this embodiment, the coolant channel 11 can be located inside the motor 10, or it can be positioned to fit against the outside of the motor 10. It is understood that when multiple areas of the motor 10 require heat dissipation, the coolant channel 11 can also be configured to correspond to multiple areas and achieve the function of heat dissipation for multiple areas. Specifically, the coolant channel 11 can flow through multiple areas sequentially to dissipate heat from multiple areas sequentially. In other embodiments, the coolant channel 11 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 inside the motor 10 that requires heat dissipation, thus forming a function where coolant flows through the motor 10 and cools all areas within the motor 10.

[0066] Please refer to the above. Figure 3 The diagram shows the frame structure of the liquid cooling system 20 in the power equipment 100 of this application.

[0067] like Figure 3 As shown, the circulation pipe 22 of the liquid cooling system 20 includes a supply pipe 221 and a collection tank 222. The supply pipe 221 and the collection tank 222 are interconnected. The outlet of the circulation pipe 22 is located on one side of the supply pipe 221, and the inlet of the circulation pipe 22 is located at the collection tank 222. The pump port of the pressure pump 21 is connected in series with the supply pipe 221. The collection tank 222 is used to receive the coolant flowing out from the outlet of the coolant channel 11, and the pressure pump 21 is used to drive the coolant in the collection tank 222 to flow through the supply pipe 221 into the inlet of the coolant channel 11, thereby cooling the motor 10.

[0068] like Figure 3 As shown, the liquid cooling system 20 includes a diversion valve 23. The inlet of the diversion valve 23 is connected to the outlet of the supply pipe 221, and the two outlets of the diversion valve 23 are respectively connected to the coolant passage 11 and the reducer coolant passage 31. Thus, the coolant in the liquid cooling system 20 can dissipate heat from the motor 10 and the reducer 30 respectively. Understandably, the pressure pump 21 needs to be located between the collection tank 222 and the diversion valve 23. The pressure pump 21 is used to simultaneously provide the power for the circulation of coolant flowing into the coolant passage 11 and the reducer coolant passage 31.

[0069] Figure 4 This illustrates the specific structure of the power equipment 100 in one embodiment of the present application.

[0070] like Figure 4 As shown, the power equipment 100 includes a housing 101. The housing 101 includes a vent valve 103. The inner cavity 102 of the housing 101 is used to accommodate the internal components of the power equipment 100. Figure 4In the schematic diagram, the bottom of the inner cavity 102 of the housing 101 along the direction of gravity includes a liquid collection tank 222. The liquid collection tank 222 is located below the motor 10 and the reducer 30. Coolant flows out through the outlet of the coolant channel 11 and the outlet of the reducer coolant channel 31, and flows into the liquid collection tank 222 under the action of gravity.

[0071] In some embodiments, the interior of the housing 101 may also be provided with structures such as flow guide channels (not shown in the figure) to assist the collection pool 222 in collecting coolant.

[0072] like Figure 4 As shown, the bottom of the inner cavity 102 of the shell 101 can be directly constructed as a liquid collection pool 222. It can be understood that by using the bottom of the inner cavity 102 to construct the liquid collection pool 222, the independent liquid collection pool 222 structure can be eliminated, and the internal space of the shell 101 can be made more efficient.

[0073] like Figure 4 As shown, the housing 101 includes a vent valve 103. The vent valve 103 is located above the liquid collection tank 222. The liquid collection tank 222 is connected to the outside through the vent valve 103. In this embodiment, the heat generated by the motor 10 causes the coolant temperature to rise, and the internal air pressure of the inner cavity 102 increases accordingly. The vent valve 103 can not only be used to balance the internal and external air pressure of the housing 101, but also to discharge the water vapor generated by the water in the coolant.

[0074] The motor 10 of the power equipment 100 provided in this application embodiment can not only adjust the speed according to the power demand of the vehicle 200, but also adjust the speed according to the temperature of the coolant.

[0075] For example, during the operation of the vehicle 200, the motor 10 generates heat, which can be dissipated by the liquid cooling system 20. It is understood that changes in the rotational speed of the motor 10 can cause changes in the heat generated by the motor 10. When the rotational speed of the motor 10 increases, the heat generated by the motor 10 increases accordingly. When the rotational speed of the motor 10 decreases, the heat generated by the motor 10 decreases accordingly.

[0076] The liquid cooling system 20 of the power equipment 100 provided in this application embodiment adjusts the flow rate of coolant in the supply pipe 221 and the coolant channel 11 through a pressure pump 21. For example, increasing the rotational speed of the pressure pump 21 increases the coolant flow rate. Decreasing the rotational speed of the pressure pump 21 decreases the coolant flow rate. It is understood that the coolant exchanges heat with the motor 10, absorbing heat from the motor 10, thus increasing the coolant temperature. For example, the faster the coolant flow rate, the faster the heat exchange between the coolant and the motor 10, the slower the coolant temperature rises, and the better the heat dissipation effect on the motor 10. Conversely, the slower the coolant flow rate, the slower the heat exchange between the coolant and the motor 10, the faster the coolant temperature rises, and the lower the heat dissipation effect on the motor 10.

[0077] During vehicle operation, rain, snow, and humid environments can cause water to enter the power unit 100. The coolant in the liquid cooling system 20 may also absorb water, reducing its concentration. When the water content in the coolant reaches a certain level (e.g., 2000 mg / L), oil-water separation may occur. When the water content in the coolant reaches 3000 mg / L, the coolant approaches saturation, and a large amount of water will precipitate out, forming free water. This can lead to reduced lubrication and insulation failure in the motor 10, affecting the lifespan and performance of the power unit 100.

[0078] In the power equipment 100 provided in this application embodiment, the pressure pump 21 or motor 10 can control not only the temperature of the motor 10 but also the temperature of the coolant in the liquid cooling system 20 by adjusting its rotational speed. By adjusting the rotational speed of the pressure pump 21 or motor 10 in the power equipment 100 provided in this application embodiment, the temperature of the coolant in the liquid cooling system 20 is made greater than or equal to a preset coolant temperature. This allows the water in the coolant to evaporate, preventing adverse phenomena such as decreased lubrication effect of the coolant and internal insulation failure of the motor 10, thereby improving the lifespan and performance of the power equipment 100.

[0079] The power equipment 100 provided in this application embodiment can operate in both drive mode and dehumidification mode. In this application embodiment, the preset coolant temperature can be higher than the coolant temperature when the power equipment 100 outputs power, thereby causing the water in the coolant to evaporate more quickly, thus removing the water from the power equipment 100 and achieving the dehumidification effect. In this application embodiment, the preset coolant temperature of the power equipment 100 can be preset. In one embodiment, the preset coolant temperature can be set to be greater than or equal to 100 degrees Celsius. It is understood that water will vaporize at a temperature greater than 100 degrees Celsius, and a preset coolant temperature greater than or equal to 100 degrees Celsius can ensure that the water in the coolant evaporates quickly.

[0080] For example, the power unit 100 operates in drive mode. The motor 10 outputs power, and the liquid cooling system 20 dissipates heat from the motor. The motor temperature is controlled within a first preset motor temperature to ensure the normal operation of the motor 10. At this time, the coolant temperature in the liquid cooling system 20 can be lower than the preset coolant temperature.

[0081] For example, the power unit 100 operates in dehumidification mode. The motor 10 can be used to output power, idle, or stall. Increasing the motor 10's speed increases its heat generation, thereby raising the temperature of the coolant. In some embodiments, the motor 10 can also stall, causing its temperature to rise rapidly, thus raising the coolant temperature. Alternatively, the pressure pump 21 can decrease its speed, causing the coolant temperature to rise.

[0082] The power equipment 100 provided in this application embodiment can monitor the temperature of the coolant in the liquid cooling system 20 and adjust the speed of the pressure pump 21 or the speed of the motor 10 according to the temperature of the coolant, so that the temperature of the coolant in the liquid cooling system 20 is equal to or greater than the preset coolant temperature, ensuring that the water in the coolant evaporates quickly and achieving the de-heating effect of the power equipment 100.

[0083] In this embodiment, the power equipment 100 or the liquid cooling system 20 includes a coolant temperature sensor (not shown). The coolant temperature sensor is used to monitor the temperature of the coolant. In one embodiment, the coolant temperature sensor may be located in a collection tank 222. The collection tank 222 has a relatively large coolant capacity, which can ensure the accuracy of the coolant temperature monitoring by the coolant sensor.

[0084] In one embodiment, the pressure pump 21 in the power device 100 adjusts its rotational speed in response to a comparison between the coolant temperature and a preset coolant temperature. In another embodiment, the motor 10 in the power device 100 adjusts its rotational speed in response to a comparison between the coolant temperature and a preset coolant temperature. In yet another embodiment, both the pressure pump 21 and the motor 10 in the power device 100 adjust their rotational speeds in response to a comparison between the coolant temperature and a preset coolant temperature.

[0085] In this embodiment, the power device 100 or the motor 10 includes a motor temperature sensor (not shown). The motor temperature sensor is used to monitor the temperature of the motor 10. In some embodiments, the preset motor temperature can also be preset or dynamically adjusted according to the working scenario of the vehicle 200.

[0086] In one embodiment, the duration for which the power device 100 operates in dehumidification mode can be preset. For example, the specific duration for which the power device 100 operates in dehumidification mode is set to be less than or equal to 25 minutes. See also... Figure 5 Based on data obtained from experimental verification. Among them, Figure 5 The vertical axis represents the water content in the coolant. Figure 5 The horizontal axis represents the duration for which power equipment 100 operates in dehumidification mode. For example... Figure 5 As shown, with the preset coolant temperature set to 80 degrees Celsius, after the power equipment 100 operates in dehumidification mode for 15 minutes, the water content in the coolant decreases from 1100 mg / L to approximately 1500 mg / L. With the preset coolant temperature set to 150 degrees Celsius, after the power equipment 100 operates in dehumidification mode for 25 minutes, the water content in the coolant decreases from 5000 mg / L to approximately 370 mg / L.

[0087] Understandably, in this embodiment, the preset coolant temperature is 80-150 degrees Celsius. This balances the dehumidification effect of the power equipment 100 with the reliable operation of the motor 10, thereby preventing performance degradation of the motor 10 due to excessive water content in the coolant and preventing damage to the internal components of the motor 10 due to high temperatures. Furthermore, since the evaporation temperature of coolant is typically greater than 200 degrees Celsius, setting the coolant temperature to 80-150 degrees Celsius also prevents coolant loss from the liquid cooling system 20.

[0088] It is understood that the duration of operation of the power equipment 100 in dehumidification mode provided in the embodiments of this application can be adjusted based on the specific structure of the power equipment 100, the specific operating conditions of the motor 10, and other factors, according to the ideas of this application. Any appropriate extension or shortening of the preset duration by those skilled in the art falls within the technical scope claimed in this application.

[0089] Existing power equipment typically requires dedicated filtration devices to separate oil and water. The separated water needs to be discharged through dedicated pipelines to achieve the dehumidification function of the coolant. Dedicated filtration devices and dedicated pipelines increase the size of existing power equipment and its integration, which is detrimental to the manufacturing and control of existing power equipment.

[0090] The power equipment 100 provided in this application embodiment can omit the dedicated filtering device, thereby reducing the size of the power equipment 100 and facilitating its assembly and maintenance. The vehicle 200 provided in this application embodiment includes the power equipment 100 provided in this application embodiment and can obtain similar beneficial effects.

[0091] like Figure 2 As shown, the power equipment 100 provided in this embodiment includes a controller 40. The controller 40 is used to control the speed adjustment of at least one of the pressure pump 21 or the motor 10. In one embodiment, the controller 40 is used to control the operating mode of the power equipment 100 and control the speed adjustment of at least one of the pressure pump 21 or the motor 10. In one embodiment, the controller 40 is located inside the power equipment 100. In another embodiment, the controller 40 may also be located inside the vehicle 200, and the controller 40 is communicatively connected to the power equipment 100 to achieve control of the power equipment 100. For example, the controller 40 may be a body control module (BCM) or a vehicle controller of the vehicle 200.

[0092] The controller 40 provided in this embodiment is used to control the speed of at least one of the pressure pump 21 or the motor 10 in response to a comparison between the temperature of the coolant and a preset coolant temperature, so that the temperature of the coolant is equal to or greater than the preset coolant temperature. Accordingly, the water in the coolant evaporates, thereby removing water from the power equipment 100 and achieving a dehumidification effect in the power equipment 100.

[0093] For ease of explanation, the following section will describe the operating logic of the power equipment 100 and the control logic of the controller 40 in conjunction with the power equipment 100 and the controller 40.

[0094] In this embodiment, the power device 100 can operate in drive mode. In one embodiment, the controller 40 controls the power device 100 to operate in drive mode. In this embodiment, when the power device 100 operates in drive mode, the temperature of the motor 10 needs to be controlled within a first motor temperature, and the temperature of the coolant needs to be controlled within a first coolant temperature.

[0095] For example, the pressure pump 21 can increase the speed to enhance the cooling effect of the coolant on the motor 10, or the motor 10 can decrease the speed to reduce the heat generated by the motor 10, so that the temperature of the motor 10 is less than or equal to the first motor temperature, and the temperature of the coolant is less than or equal to the first coolant temperature.

[0096] In this embodiment, the power equipment 100 can operate in a dehumidification mode. In one embodiment, the controller 40 controls the power equipment 100 to operate in the dehumidification mode. When the power equipment 100 operates in dehumidification mode, the temperature of the motor 10 needs to be controlled within the second motor temperature, and the temperature of the coolant needs to be controlled within the second coolant temperature.

[0097] In this embodiment, the temperature of the second motor is higher than that of the first motor, and the temperature of the second coolant is higher than that of the first coolant. It is understood that the power equipment 100 typically needs to operate in drive mode for extended periods, and it is necessary to prevent damage to the internal components of the motor 10 due to high temperatures; therefore, the temperature of the first motor needs to be lower than that of the second motor. Correspondingly, the temperature of the first coolant is lower than that of the second coolant. Additionally, when the power equipment 100 operates in dehumidification mode, the coolant needs to be heated to a higher temperature to evaporate the water in the coolant; therefore, the temperature of the second coolant needs to be higher than that of the first coolant. In this embodiment, the temperature of the second motor is between 120 and 180 degrees Celsius. In one embodiment, the temperature of the second motor can be 150 degrees Celsius, which not only ensures reliable motor operation but also keeps the coolant temperature close to or greater than 100 degrees Celsius, while also considering the power consumption of the motor 10.

[0098] For example, at least one of the pressure pump or the motor adjusts its rotational speed based on at least one of the coolant temperature or the motor temperature. For example, the controller controls the rotational speed of at least one of the pressure pump or the motor in response to a comparison between the coolant temperature and a preset coolant temperature. In this embodiment, the preset motor temperature is a second motor temperature, and the preset coolant temperature is a second coolant temperature.

[0099] In one embodiment, in response to the coolant temperature being lower than a preset coolant temperature, the pressure pump 21 reduces its rotational speed, thereby reducing the coolant flow rate. Correspondingly, heat exchange between the coolant and the motor 10 raises the coolant temperature to the preset coolant temperature.

[0100] In one embodiment, in response to the coolant temperature being lower than a preset coolant temperature, the controller 40 controls the pressure pump 21 to reduce its speed, thereby reducing the coolant flow rate. Correspondingly, heat exchange between the coolant and the motor 10 raises the coolant temperature to the preset coolant temperature.

[0101] In one embodiment, the motor 10 increases its rotational speed in response to the coolant temperature being lower than a preset coolant temperature. Consequently, the motor 10 generates more heat, causing the coolant temperature to rise to the preset coolant temperature.

[0102] In one embodiment, in response to the coolant temperature being lower than a preset coolant temperature, the controller 40 controls the motor 10 to increase its speed. Consequently, the motor 10 generates more heat, causing the coolant temperature to rise to the preset coolant temperature.

[0103] In one embodiment, in response to the coolant temperature being lower than a preset coolant temperature, the motor 10 increases its speed while the pressure pump 21 decreases its speed. Accordingly, the decrease in the speed of the pressure pump 21 reduces the coolant flow rate, while the increase in the speed of the motor 10 increases the heat generated by the motor 10, causing the coolant temperature to rise to the preset coolant temperature more quickly.

[0104] In one embodiment, in response to the coolant temperature being lower than a preset coolant temperature, the controller 40 controls the motor 10 to increase its speed and controls the pressure pump 21 to decrease its speed. Accordingly, the decrease in the speed of the pressure pump 21 reduces the coolant flow rate, while the increase in the speed of the motor 10 increases the heat generated by the motor 10, causing the coolant temperature to rise to the preset coolant temperature more quickly.

[0105] Accordingly, the power equipment 100 and controller 40 provided in this application embodiment can adjust the speed of the power equipment 100 via the pressure pump 21 or at least the motor 10, thereby making the temperature of the coolant equal to or greater than the preset coolant temperature. Consequently, the water in the coolant evaporates, thereby removing water from the power equipment 100 and achieving a dehumidification effect. Furthermore, the power equipment 100 or controller 40 provided in this application embodiment can simultaneously adjust the speed of the motor 10 and the pressure pump 21, allowing the coolant temperature to rise rapidly, preventing the power equipment 100 from operating in dehumidification mode for extended periods, thus reducing the time the motor 10 operates at higher temperatures and preventing damage to the internal components of the motor 10 due to high temperatures.

[0106] In one embodiment, the motor 10 reduces its speed in response to the coolant temperature being greater than or equal to a preset coolant temperature.

[0107] In one embodiment, the controller 40 controls the motor 10 to reduce its speed in response to the coolant temperature being greater than or equal to a preset coolant temperature.

[0108] It is understandable that when the temperature of the coolant is greater than or equal to the preset coolant temperature, the water in the coolant can evaporate, and the motor 10 can appropriately reduce its speed, thereby reducing the heat generated by the motor 10, and thus reducing the power consumption of the motor 10 and preventing the motor 10 from overheating.

[0109] In one embodiment, in response to the temperature of the motor 10 being greater than or equal to a preset motor temperature, the pressure pump 21 increases its rotational speed, thereby increasing the flow rate of the coolant. Consequently, the increased coolant flow rate enhances the heat dissipation effect on the motor 10, thereby reducing the temperature of the motor 10 and preventing damage to the internal components of the motor 10 due to high temperatures.

[0110] In one embodiment, in response to the temperature of the motor 10 being greater than or equal to a preset motor temperature, the controller 40 controls the pressure pump 21 to increase its rotational speed, thereby increasing the flow rate of the coolant. Consequently, the increased coolant flow rate enhances the heat dissipation effect on the motor 10, thereby reducing the temperature of the motor 10 and preventing damage to the internal components of the motor 10 due to high temperatures.

[0111] In one embodiment, the motor 10 reduces its speed in response to the motor 10's temperature being greater than or equal to a preset motor temperature. Consequently, the heat generated by the motor 10 decreases, thereby reducing the motor 10's temperature and preventing damage to the internal components of the motor 10 due to high temperatures.

[0112] In one embodiment, in response to the temperature of the motor 10 being greater than or equal to a preset motor temperature, the controller 40 controls the motor 10 to reduce its speed. Consequently, the heat generated by the motor 10 decreases, thereby reducing the temperature of the motor 10 and preventing damage to the internal components of the motor 10 due to high temperature.

[0113] In one embodiment, in response to the temperature of motor 10 being greater than or equal to a preset motor temperature, motor 10 reduces its rotational speed while pressure pump 21 increases its rotational speed. Consequently, the coolant flow rate increases and the heat generated by motor 10 decreases, thereby reducing the temperature of motor 10 more quickly and preventing damage to internal components of motor 10 due to high temperatures.

[0114] In one embodiment, in response to the temperature of the motor 10 being greater than or equal to a preset motor temperature, the controller 40 controls the motor 10 to reduce its speed and controls the pressure pump 21 to increase its speed. Consequently, the coolant flow rate increases and the heat generated by the motor 10 decreases, thereby reducing the temperature of the motor 10 more quickly and preventing damage to the internal components of the motor 10 due to high temperature.

[0115] Accordingly, the power device 100 or controller 40 provided in this application embodiment can adjust the speed of the motor 10 by at least one of the pressure pump 21 or the motor 10, thereby making the temperature of the motor 10 lower than the preset motor temperature and preventing damage to the internal components of the motor 10 due to high temperature. In addition, the power device 100 or controller 40 provided in this application embodiment can adjust the speed of the motor 10 and the pressure pump 21 simultaneously, so that the temperature of the motor 10 can be reduced more quickly, preventing damage to the internal components of the motor 10 due to high temperature.

[0116] In one embodiment, the pressure pump 21 increases its rotational speed in response to the coolant temperature being lower than a preset coolant temperature and the motor 10 temperature being greater than or equal to a preset motor temperature. Consequently, the coolant flow rate increases, the heat dissipation effect of the motor 10 is improved, and the temperature of the motor 10 decreases, preventing damage to the internal components of the motor 10 due to high temperature.

[0117] In one embodiment, in response to the coolant temperature being lower than a preset coolant temperature and the motor 10 temperature being greater than or equal to a preset motor temperature, the controller 40 controls the pressure pump 21 to increase its speed. Consequently, the coolant flow rate increases, the heat dissipation effect of the motor 10 is improved, and the temperature of the motor 10 decreases, preventing damage to the internal components of the motor 10 due to high temperature.

[0118] In one embodiment, in response to the coolant temperature being lower than a preset coolant temperature and the motor 10 temperature being greater than or equal to a preset motor temperature, the motor 10 reduces its rotational speed. Consequently, the reduced rotational speed of the motor 10 decreases the heat generated by the motor 10, thereby lowering the motor 10 temperature and preventing damage to the internal components of the motor 10 due to high temperatures.

[0119] In one embodiment, in response to the coolant temperature being lower than a preset coolant temperature and the motor 10 temperature being greater than or equal to a preset motor temperature, the controller 40 controls the motor 10 to reduce its speed. Consequently, the reduced speed of the motor 10 decreases the heat generated by the motor 10, thereby lowering the temperature of the motor 10 and preventing damage to the internal components of the motor 10 due to high temperature.

[0120] In one embodiment, in response to the coolant temperature being lower than a preset coolant temperature and the motor 10 temperature being greater than or equal to a preset motor temperature, the motor 10 reduces its rotational speed while the pressure pump 21 increases its rotational speed. Consequently, the coolant flow rate increases, and the motor 10 rotational speed decreases, causing the motor 10 temperature to drop more quickly and preventing damage to the internal components of the motor 10 due to high temperatures.

[0121] In one embodiment, in response to the coolant temperature being lower than a preset coolant temperature and the motor 10 temperature being greater than or equal to a preset motor temperature, the controller 40 controls the motor 10 to reduce its speed and controls the pressure pump 21 to increase its speed. Accordingly, the coolant flow rate increases and the motor 10 speed decreases, causing the motor 10 temperature to drop more quickly and preventing damage to the internal components of the motor 10 due to high temperature.

[0122] Understandably, although the coolant temperature is lower than the preset coolant temperature, because the temperature of motor 10 is greater than or equal to the preset motor temperature, it is necessary to prioritize lowering the temperature of motor 10 to prevent damage to the internal components of motor 10 due to high temperature. To lower the temperature of motor 10 to below the preset motor temperature, the power unit 100 or controller 40 adjusts the speed of at least one of the pressure pump 21 or motor 10 to raise the coolant temperature to above or equal to the preset coolant temperature.

[0123] like Figure 6 As shown in the embodiment of this application, the liquid cooling system 20 of the power equipment 100 includes a heat exchanger 24. The heat exchanger 24 is used to connect to the circulation pipe 22 and to cool the coolant in the circulation pipe 22. Specifically, the heat exchanger 24 can be connected in series with the supply pipe 221 and is used to cool the coolant flowing through the supply pipe 221. The coolant absorbs heat from the motor 10 and the reducer 30, and its temperature rises when it flows back to the collection tank 222. The heat exchanger 24 cools the coolant, so that the temperature of the coolant entering the coolant channel 11 and the reducer coolant channel 31 is lower, thereby improving the heat exchange effect between the coolant and the motor 10 and the reducer 30 and ensuring that the temperature of the motor 10 is lower than the preset motor temperature.

[0124] The heat exchanger 24 can dissipate heat from the coolant through heat exchange, including but not limited to air cooling and water cooling. For example... Figure 6As shown, heat exchanger 24 can be connected between pressure pump 21 and flow divider valve 23. In some embodiments, heat exchanger 24 can be connected between pressure pump 21 and liquid collection tank 222. External refrigerant flows inside heat exchanger 24, and heat exchanger 24 exchanges heat with coolant in supply pipe 221 through external refrigerant to dissipate heat from the coolant. In some embodiments, the heat exchanger 24's heat exchange power is controlled by controlling the amount of heat exchange between external refrigerant and coolant in supply pipe 221.

[0125] In this embodiment, the power equipment 100 operates in drive mode, and the heat exchanger 24 can adjust the heat exchange power based on the temperature of the motor 10 to control the temperature of the coolant in the coolant channel 11 and the coolant channel 31 of the reducer, thereby controlling the temperature of the motor 10 below the first preset motor temperature and ensuring the reliable operation of the motor 10.

[0126] In this embodiment, the power equipment 100 operates in dehumidification mode. The heat exchanger 24 increases its heat exchange power in response to the motor 10's temperature being greater than or equal to a preset motor temperature. Alternatively, the heat exchanger 24 decreases its heat exchange power in response to the motor 10's temperature being less than the preset motor temperature. Therefore, the heat exchanger 24 can control the motor 10's temperature by adjusting its own heat exchange power when the power equipment 100 is operating in dehumidification mode.

[0127] In one embodiment, in response to the temperature of the motor 10 being greater than or equal to a preset motor temperature, the heat exchanger 24 increases its heat exchange power to reduce the temperature of the coolant in the coolant channel 11. It is understood that a relatively low coolant temperature in the coolant channel 11 results in better heat exchange between the coolant and the motor 10, thus providing better heat dissipation for the motor 10 and lowering its temperature. The temperature of the motor 10 is thus reduced to below the preset motor temperature, preventing damage to the internal components of the motor 10 due to high temperatures.

[0128] In one embodiment, in response to the temperature of the motor 10 being lower than the preset motor temperature, the heat exchanger 24 reduces its heat exchange power, and the temperature of the coolant increases more rapidly. The temperature of the coolant is greater than or equal to the preset coolant temperature, thus ensuring the dehumidification effect of the power equipment 100.

[0129] In one embodiment, in response to the coolant temperature being lower than the preset coolant temperature, the heat exchanger 24 reduces its heat exchange power, and the coolant temperature rises more rapidly, so that the coolant temperature is greater than or equal to the preset coolant temperature, thus ensuring the dehumidification effect of the power equipment 100.

[0130] The controller 40 provided in this application embodiment can be used to control the heat exchanger 24. Specifically, the controller 40 is communicatively connected to the heat exchanger 24. In one embodiment, in response to the temperature of the motor 10 being greater than or equal to a preset motor temperature, the controller 40 controls the heat exchanger 24 to increase its heat exchange power. In another embodiment, in response to the temperature of the motor 10 being less than a preset motor temperature, the controller 40 reduces the heat exchange power of the heat exchanger 24. In yet another embodiment, in response to the temperature of the coolant being less than a preset coolant temperature, the controller 40 controls the heat exchanger 24 to reduce its heat exchange power.

[0131] Accordingly, the controller 40 provided in this application embodiment adjusts the temperature of the coolant in the liquid cooling system 20 through the heat exchanger 24, thereby ensuring that the temperature of the motor 10 is lower than the preset motor temperature and improving the dehumidification efficiency of the power equipment 100.

[0132] In this embodiment of the application, reducing the heat exchange power of the heat exchanger 24 includes shutting down the heat exchanger, and increasing the heat exchange power of the heat exchanger 24 includes turning on the heat exchanger.

[0133] In this embodiment, the heat exchanger 24 of the liquid cooling system 20 includes various structures. Correspondingly, the adjustment of the heat exchange power of the heat exchanger 24 includes various implementation methods. For example, see... Figures 7-9 And related implementation examples.

[0134] Please see Figure 7 The diagram shows an internal structure of the heat exchanger 24 in the liquid cooling system 20. (See diagram for reference.) Figure 7 As shown, the heat exchanger 24 has independent coolant passage 241 and refrigerant passage 242 inside. Coolant passage 241 can be a section of the supply pipe 221, through which coolant from the liquid cooling system 20 flows as it passes through the heat exchanger 24. Refrigerant passage 242 is fixed close to coolant passage 241 and is connected to an external cooling system (not shown). The external cooling system provides external refrigerant to refrigerant passage 242. That is, external refrigerant flows through refrigerant passage 242. Because coolant passage 241 and refrigerant passage 242 are close to each other, the external refrigerant flowing through refrigerant passage 242 can exchange heat with the coolant flowing through coolant passage 241, thereby achieving the cooling effect of the heat exchanger 24 on the coolant.

[0135] A heat exchange pump 243 is connected in series in the refrigerant passage 242. The heat exchange pump 243 is used to control the flow rate of the external refrigerant within the refrigerant passage 242. Understandably, increasing the speed of the heat exchange pump 243 increases the flow rate of the external refrigerant in the refrigerant passage 242, resulting in better heat exchange between the external refrigerant and the coolant in the coolant passage 241, and thus higher heat exchange power of the heat exchanger 24. Conversely, decreasing the speed of the heat exchange pump 243 slows down the flow rate of the external refrigerant in the refrigerant passage 242, weakening the heat exchange between the external refrigerant and the coolant in the coolant passage 241, and reducing the heat exchange power of the heat exchanger 24.

[0136] For example, in response to the temperature of the motor 10 being greater than or equal to a preset motor temperature, the heat exchanger 24 increases the speed of the heat exchange pump 243 to increase the heat exchange power of the heat exchanger 24. Alternatively, in response to the temperature of the motor 10 being less than the preset motor temperature, the heat exchanger 24 decreases the speed of the heat exchange pump 243 to decrease the heat exchange power of the heat exchanger 24.

[0137] In this embodiment, the heat exchanger 24 controls its own heat exchange power by adjusting the rotation speed of the heat pump 243, thereby preventing damage to the internal components of the motor 10 due to high temperature, while ensuring the dehumidification effect of the power equipment 100.

[0138] For example, in response to the temperature of motor 10 being greater than or equal to a preset motor temperature, controller 40 increases the speed of heat pump 243 in heat exchanger 24 to increase the heat exchange power of heat exchanger 24. In one embodiment, controller 40 also decreases the speed of heat pump 243 in heat exchanger 24 in response to the temperature of motor 10 being lower than a preset motor temperature to reduce the heat exchange power of heat exchanger 24. By adjusting the speed of heat pump 243, controller 40 controls the temperature of coolant in liquid cooling system 20, thereby ensuring that the temperature of motor 10 is lower than the preset motor temperature, while improving the dehumidification efficiency of power equipment 100.

[0139] like Figure 8 As shown, the heat exchanger 24 includes a heat exchange diversion valve 244. The heat exchange outlet 2441 of the heat exchange diversion valve 244 is connected to the refrigerant passage 242. The heat exchange diversion valve 244 controls the flow rate of the external refrigerant in the refrigerant passage 242 by controlling the opening degree of the heat exchange outlet 2441. It can be understood that when the opening degree of the heat exchange outlet 2441 of the heat exchange diversion valve 244 increases, the flow rate of the external refrigerant in the refrigerant passage 242 increases, resulting in better heat exchange between the external refrigerant in the refrigerant passage 242 and the coolant in the coolant passage 241, thus increasing the heat exchange power of the heat exchanger 24. When the opening degree of the heat exchange outlet 2441 of the heat exchange diversion valve 244 decreases, the flow rate of the external refrigerant in the refrigerant passage 242 decreases, and the heat exchange efficiency of the heat exchanger 24 decreases accordingly.

[0140] For example, in response to the temperature of the motor 10 being greater than or equal to a preset motor temperature, the heat exchanger 24 increases the opening of the heat exchange outlet 2441 in the heat exchange diversion valve 244, thereby increasing the heat exchange power. Alternatively, in response to the temperature of the motor 10 being less than a preset motor temperature, the heat exchanger 24 decreases the opening of the heat exchange outlet 2441 in the heat exchange diversion valve 244, thereby reducing the heat exchange power. In this case, the heat exchanger 24 controls the heat exchange power by adjusting the opening of the heat exchange outlet 2441 in the heat exchange diversion valve 244, thereby improving the dehumidification effect of the power equipment 100 while ensuring the reliable operation of the motor 10.

[0141] For example, in response to the temperature of the motor 10 being greater than or equal to a preset motor temperature, the controller 40 increases the opening of the heat exchange outlet 2441 in the heat exchanger 24, thereby controlling the heat exchanger 24 to increase its heat exchange power. In one embodiment, the controller 40 also responds to the temperature of the motor 10 being less than a preset motor temperature by decreasing the opening of the heat exchange outlet 2441 in the heat exchanger 24, thereby controlling the heat exchanger 24 to reduce its heat exchange power. By adjusting the opening of the heat exchange outlet 2441, the controller 40 controls the heat exchange power of the heat exchanger 24, thereby adjusting the temperature of the coolant in the liquid cooling system 20, ensuring that the temperature of the motor 10 is less than the preset motor temperature, and simultaneously improving the dehumidification efficiency of the power equipment 100.

[0142] like Figure 9 As shown, heat exchanger 24 includes a bypass passage 245. The bypass passage 245 is connected in parallel with the refrigerant passage 242, and is located further away from the coolant passage 241 than the refrigerant passage 242. External refrigerant can flow through both the bypass passage 245 and the refrigerant passage 242. The bypass passage 245 and the refrigerant passage 242 are also connected to a heat exchange diversion valve 244, which is used to distribute the refrigerant flow ratio between the bypass passage 245 and the refrigerant passage 242. The heat exchange diversion valve 244 also includes a bypass outlet 2442 connected to the bypass passage 245. The heat exchange diversion valve 244 controls the flow rate of the external refrigerant within the bypass passage 245 by adjusting the opening of the bypass outlet 2442.

[0143] Specifically, the external refrigerant provided by the external cooling system flows to the heat exchange diversion valve 244 after entering the heat exchanger 24. For the power equipment 100 of this application, the heat exchange diversion valve 244 needs to be set as an electrically controlled diversion valve. When the heat exchange diversion valve 244 is connected between the bypass passage 245 and the refrigerant passage 242, it can control the opening degree of the heat exchange outlet 2441 and the opening degree of the bypass outlet 2442 respectively based on the command of the control signal, thereby adjusting the flow distribution of the external refrigerant between the bypass passage 245 and the refrigerant passage 242.

[0144] Therefore, in this embodiment, based on the structure of the heat exchange diversion valve 244, a portion of the refrigerant can enter the refrigerant passage 242, exchange heat with the coolant in the coolant passage 241, and then flow back to the external cooling system. The other portion of the refrigerant can enter the bypass passage 245 and flow directly back to the external cooling system via the bypass passage 245.

[0145] Understandably, by adjusting the ratio between the opening of the heat exchange outlet 2441 and the opening of the bypass outlet 2442 in the heat exchange diversion valve 244, the flow ratio between the external refrigerant entering the refrigerant passage 242 and entering the bypass passage 245 can be controlled, thereby controlling the heat exchange power of the heat exchanger 24. That is, in this embodiment, the heat exchanger 24 adjusts its heat exchange power by controlling at least one of the opening of the heat exchange outlet 2441 or the opening of the bypass outlet 2442 in the heat exchange diversion valve 244.

[0146] For example, in response to the temperature of the motor 10 being greater than or equal to a preset motor temperature, the heat exchanger 24 increases the opening of the heat exchange outlet 2441 in the heat exchange diversion valve 244, or decreases the opening of the bypass outlet 2442 in the heat exchange diversion valve 244, thereby increasing the heat exchange power of the heat exchanger 24. Alternatively, in response to the temperature of the motor 10 being less than a preset motor temperature, the heat exchanger 24 decreases the opening of the heat exchange outlet 2441 in the heat exchange diversion valve 244, or increases the opening of the bypass outlet 2442 in the heat exchange diversion valve 244, thereby decreasing the heat exchange power of the heat exchanger 24. At this time, the heat exchanger 24 adjusts the heat exchange power by controlling the opening of the heat exchange outlet 2441 and / or the bypass outlet 2442 in the heat exchange diversion valve 244, thereby improving the dehumidification effect of the power equipment 100 while ensuring the reliable operation of the motor 10.

[0147] For example, in response to the temperature of the motor 10 being greater than or equal to a preset motor temperature, the controller 40 increases the opening of the heat exchange outlet 2441 in the heat exchanger 24 or decreases the opening of the bypass outlet 2442 in the heat exchanger 24, thereby increasing the heat exchange power of the heat exchanger 24. In one embodiment, the controller 40 also responds to the temperature of the motor 10 being less than a preset motor temperature by decreasing the opening of the heat exchange outlet 2441 in the heat exchanger 24 or increasing the opening of the bypass outlet 2442 in the heat exchanger 24, thereby reducing the heat exchange power of the heat exchanger 24. By adjusting the opening of the heat exchange outlet 2441 and / or the bypass outlet 2442, the controller 40 controls the temperature of the coolant in the liquid cooling system 20, thereby ensuring that the temperature of the motor 10 is less than the preset motor temperature, while simultaneously improving the dehumidification efficiency of the power equipment 100.

[0148] like Figure 10 As shown, the coolant in the power equipment 100 of this application is oil, and the vent valve 103 may also be equipped with an oil-water separation membrane 1031. Specifically, the vent valve 103 includes a frame 1032, which is used to fix it to the housing 101. The frame 1032 has a through hole that connects the inner cavity 102 and the outside of the housing 101, and the oil-water separation membrane 1031 is also provided in the through hole. That is, the oil-water separation membrane 1031 is fixed in the through hole of the frame 1032 and forms a membrane material separating the inner cavity 102 and the outside of the housing 101 of the vent valve 103.

[0149] The oil-water separation membrane 1031 has the property of allowing water molecules to pass through while blocking oil molecules. The oil-water separation membrane 1031 is installed in the vent valve 103, ensuring that during dehumidification of the power equipment 100, water vapor passes through the oil-water separation membrane 1031 and is discharged from the housing 101 through the vent valve 103. Simultaneously, oil molecules cannot pass through the oil-water separation membrane 1031; they are blocked inside the inner cavity 102, thereby preventing coolant loss in the liquid cooling system 20 due to coolant evaporation.

[0150] In this embodiment, the power device 100 can operate in both drive mode and dehumidification mode. The power device 100 primarily operates in drive mode to propel the vehicle 200. In one embodiment, the power device 100 can be configured to activate and operate in dehumidification mode upon receiving a user command. Alternatively, the power device 100 can be configured to activate and operate in dehumidification mode when a preset interval is detected.

[0151] The following details the two different triggering conditions for starting the dehumidification mode of the power equipment 100:

[0152] In one embodiment, the power device 100 receives a user command and activates the dehumidification mode. This can be understood as the power device 100 activating the dehumidification function based on the user's active control. In another embodiment, the controller 40 receives a user-input command, and the power device 100 activates the dehumidification mode. The user's command input can be achieved through button or touch operations on the vehicle 200, or through a communication connection between the user terminal and the vehicle 200. The controller 40 provided in this application does not need to limit the method of user command input when the dehumidification mode is triggered by receiving a user command.

[0153] Correspondingly, users can actively control the power unit 100 to start and operate in dehumidification mode. The user's judgment does not require a specific time period or triggering event; they only need to actively control the power unit 100 to start the dehumidification function when they deem it necessary. The vehicle 200 provided in this application can inform the user of the recommended dehumidification frequency upon delivery. Users can also independently adjust the dehumidification frequency of the power unit 100 based on reference factors such as the environment, weather, and temperature in which they drive the vehicle 200.

[0154] In one embodiment, the power unit 100 or the controller 40 activates the dehumidification mode of the power unit according to a preset interval. The preset interval can be pre-set at the factory when the vehicle 200 or power unit 100 leaves the factory, or it can be set by the user during the use of the vehicle 200. The preset interval set at the factory can be understood as the manufacturer's recommended dehumidification frequency. The preset interval set by the user can be understood as the dehumidification frequency set by the user based on reference factors such as the usage environment, weather, and temperature.

[0155] The power device 100 or controller 40 provided in this application embodiment can use the above two triggering conditions in combination to activate the dehumidification function of the power device 100 under different demand scenarios. The two triggering conditions can complement each other to ensure the reliable operation of the power device 100.

[0156] In one embodiment, the power unit 100 provided in this application includes a humidity sensor (not shown) for sensing the ambient humidity of the power unit 100. The power unit 100 can adjust the duration of operation in dehumidification mode based on the ambient humidity. In some embodiments, the humidity sensor may also be installed inside the vehicle 200, and the power unit 100 can monitor the ambient humidity of the power unit 100 through a communication connection between the controller 40 and the humidity sensor.

[0157] In this embodiment, the water content in the coolant of the power unit 100 varies depending on the driving scenario. When the operating environment of the power unit 100 is relatively dry, the power unit 100 can shorten the time it operates in dehumidification mode to save energy and protect the motor 10. When the operating environment of the power unit 100 is relatively humid, the power unit 100 can extend the time it operates in dehumidification mode to ensure the evaporation of water in the coolant.

[0158] In one embodiment, the power device 100 also adjusts the preset interval duration of operation in dehumidification mode based on the ambient humidity.

[0159] In this embodiment, the adjustment of the preset interval duration is based on environmental factors, specifically on varying humidity levels. It is understandable that the moisture content in the air differs depending on the environmental conditions. When the vehicle 200 is in a relatively dry environment such as a desert or Gobi, the humidity in the operating environment of the power unit 100 is relatively low. Consequently, the coolant can absorb relatively little moisture, maintaining a relatively low moisture content over a long period. In this case, the preset interval duration can be appropriately extended, and the power unit 100 can be prevented from frequently operating in dehumidification mode under unnecessary conditions.

[0160] When vehicle 200 is in a relatively humid environment such as a coastline or riverbank for an extended period, the humidity in the working environment of power equipment 100 is relatively high. In this situation, the coolant can absorb a relatively large amount of water, and the coolant can quickly reach a relatively high water content. Therefore, the preset interval time can be appropriately shortened, and power equipment 100 can be controlled to operate in dehumidification mode to prevent the coolant from becoming too wet.

[0161] In one embodiment, the power unit 100 includes a memory (not shown) for receiving and recording weather information of the area where the vehicle 200 travels, and the power unit 100 can also adjust the preset interval based on the weather information.

[0162] In this embodiment, the adjustment of the preset interval duration can be based on weather factors. It is understood that the amount of moisture entering the power equipment 100 may vary depending on the weather conditions. When there is relatively little rain on a given day, the road surface where the vehicle 200 travels is relatively dry and not washed away by rain, resulting in less moisture entering the power equipment 100. The coolant can maintain a relatively low water content over a long period. In this case, the preset interval duration can be appropriately extended, and the power equipment 100 can be prevented from operating in dehumidification mode relatively frequently under unnecessary conditions.

[0163] When there is relatively more rain on a certain date, the road surface where vehicle 200 travels is relatively slippery, and vehicle 200 is subjected to more rainwater washing, resulting in a relatively high water content in the coolant in power equipment 100. At this time, the preset interval for power equipment 100 to operate in dehumidification mode can be reduced, thereby controlling power equipment 100 to operate in dehumidification mode in a timely manner.

[0164] Based on the above embodiments, the preset interval duration can be adjusted by combining various external reference variables to reasonably set the frequency of the power equipment 100 operating in dehumidification mode, thereby saving energy consumption. Simultaneously, by controlling the duration of the power equipment 100 operating in dehumidification mode, the dehumidification efficiency of the power equipment 100 can be improved.

[0165] It should be noted that some or all of the embodiments of the power device 100 and controller 40 in this application can be developed based on the existing structure of the power device 100. Therefore, the power device 100 and controller 40 can also transmit the aforementioned control strategy to the vehicle 200 via over-the-air (OTA) technology or local transmission, and store it in the vehicle 200's body controller or in the power device 100's controller. This allows the existing vehicle 200 to also apply the control strategy of the power device 100 and possess dehumidification functionality through system upgrades.

[0166] 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 power equipment, characterized in that, The power equipment includes a motor, a liquid cooling system, and a housing. The motor includes a coolant channel, and the liquid cooling system includes a pressure pump and a circulation pipe. The pressure pump is used to deliver coolant to the inlet of the coolant channel through the circulation pipe and to receive coolant flowing out of the coolant channel. The circulation pipe includes a collection tank disposed within the housing. The collection tank is used to receive coolant flowing out of the coolant channel. The pressure pump is used to drive the coolant in the collection tank into the inlet of the coolant channel. The housing is provided with a vent valve. At least one of the pressure pump or the motor adjusts its rotational speed according to at least one of the coolant temperature or the motor temperature, such that the temperature of the coolant in the collection tank is greater than a preset coolant temperature, which is greater than or equal to the evaporation temperature of water in the coolant.

2. The power equipment according to claim 1, characterized in that, The pressure pump is used for: In response to the coolant temperature being lower than a preset coolant temperature, the coolant flow rate is reduced.

3. The power equipment according to claim 1 or 2, characterized in that, In response to the coolant temperature being lower than a preset coolant temperature, the motor increases its speed.

4. The power equipment according to claim 1 or 2, characterized in that, The pressure pump is used for: In response to the motor temperature being greater than or equal to a preset motor temperature, the flow rate of the coolant is increased.

5. The power equipment according to claim 1 or 2, characterized in that, In response to the coolant temperature being greater than or equal to a preset coolant temperature, the motor speed is reduced.

6. The power equipment according to claim 1 or 2, characterized in that, The pressure pump is used for: In response to the coolant temperature being lower than a preset coolant temperature and the motor temperature being greater than or equal to a preset motor temperature, the flow rate of the coolant is increased.

7. The power equipment according to claim 1 or 2, characterized in that, In response to the coolant temperature being lower than a preset coolant temperature and the motor temperature being greater than or equal to a preset motor temperature, the motor speed is reduced.

8. The power equipment according to claim 1 or 2, characterized in that, The liquid cooling system cools the coolant through a heat exchanger, wherein: In response to the motor temperature being greater than or equal to a preset motor temperature, the heat exchange power of the heat exchanger increases; In response to the motor temperature being lower than the preset motor temperature, the heat exchanger's heat exchange power is reduced.

9. A controller for a power equipment, characterized in that, The power equipment includes a motor and a liquid cooling system. The motor includes a coolant channel, and the liquid cooling system includes a pressure pump and a circulation pipe. The pressure pump is used to deliver coolant to the inlet of the coolant channel through the circulation pipe and to receive coolant flowing out of the coolant channel. The controller is used for: In response to a comparison between the temperature of the coolant and a preset coolant temperature, the rotational speed of at least one of the pressure pump or the motor is controlled; wherein the preset coolant temperature is greater than or equal to the evaporation temperature of water in the coolant.

10. The controller according to claim 9, characterized in that, The controller is used for: In response to the coolant temperature being lower than a preset coolant temperature, the speed of the pressure pump is controlled to decrease or the speed of the motor is controlled to increase.

11. The controller according to claim 9 or 10, characterized in that, The controller is used for: In response to the motor temperature being greater than or equal to a preset motor temperature, the speed of the pressure pump is controlled to increase or the speed of the motor is controlled to decrease.

12. The controller according to claim 9 or 10, characterized in that, The controller is used for: In response to the coolant temperature being lower than a preset coolant temperature and the motor temperature being greater than or equal to a preset motor temperature, the speed of the pressure pump is controlled to increase and the speed of the motor is controlled to decrease.

13. The controller according to claim 9 or 10, characterized in that, The liquid cooling system cools the coolant via a heat exchanger, and the controller is used for: In response to the motor temperature being greater than or equal to a preset motor temperature, the heat exchange power of the heat exchanger is controlled to increase.

14. A vehicle, characterized in that, include: The wheel and the power device according to any one of claims 1-8, wherein the power device is used to drive the wheel to rotate; or, A wheel and a power unit, the power unit being used to drive the wheel to rotate, the power unit including a motor, a liquid cooling system and a controller as described in any one of claims 9-13, the liquid cooling system including a pressure pump, the controller being used to control at least one of the motor or the pressure pump according to the operating mode of the power unit.

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