Automobile cooling system

Abstract

The invention discloses an automobile cooling system which comprises a plurality of hub motors, an oil-water heat exchanger, a motor cooling loop and a whole automobile cooling loop. Each hub motor is connected with a motor cooling loop through a cooling oil pipe and used for cooling the hub motor, and an oil-water heat exchanger is arranged on each motor cooling loop; the whole vehicle cooling loop is connected with each motor cooling loop, and the whole vehicle cooling loop exchanges heat with the motor cooling loops through the oil-water heat exchanger of each motor cooling loop. On one hand, the occupied space of the hub motor can be reduced, installation is convenient, and on the other hand, the high cooling requirement of the hub motor can be met. The cooling effect of the hub motor can be ensured while a connecting pipeline is simplified.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, in particular to an automobile cooling system. Background Art

[0002] In the automobiles of the prior art, the cooling method for the hub motor is all built-in cooling, and the oil pump, oil-water heat exchanger, etc. in the cooling circuit are integrated into the hub motor and directly connected to the hub motor for oil cooling and heat exchange. However, integrating the cooling circuit into the hub motor will take up a lot of space. However, the space reserved for the installation of the hub motor in the automobile is small, and the hub motor has a higher cooling requirement. The existing structure and cooling system have the problem of complex installation and cannot meet the higher cooling requirement of the hub motor.

[0003] Therefore, providing an automobile cooling system with a simple installation structure and capable of ensuring a cooling effect while not occupying the cooling space of the hub motor has become a technical problem that urgently needs to be solved in the field. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an automobile cooling system, which, based on the reserved space for the hub motor in the whole vehicle and its cooling requirements, solves the problem that the hub motor occupies a large space and the cooling system cannot meet its high cooling requirements.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A vehicle cooling system includes multiple wheel hub motors and oil-water heat exchangers, a motor cooling circuit and a whole vehicle cooling circuit; each wheel hub motor is connected to the motor cooling circuit via a cooling oil pipe for cooling the wheel hub motor, and an oil-water heat exchanger is provided on the motor cooling circuit; the whole vehicle cooling circuit is connected to each motor cooling circuit, and the whole vehicle cooling circuit exchanges heat with the motor cooling circuit via the oil-water heat exchanger of each motor cooling circuit.

[0007] Furthermore, the vehicle cooling circuit includes: a water tank, which is set as one; a water pump, which is set as two, and the two water pumps are respectively connected to the water tank; there are two inverters, which are connected to the water pumps one-to-one, and the inverter is connected to the oil-water heat exchanger of the two adjacent motor cooling circuits; the water pump is used to extract water from the water tank and pump it into the inverter, and after cooling the inverter, the water flows into the oil-water heat exchanger for heat exchange.

[0008] Furthermore, the automobile cooling system also includes a cooling water pipe, the oil-water heat exchanger is connected to the water tank through the cooling water pipe, and the water after heat exchange in the oil-water heat exchanger flows back to the water tank through the cooling water pipe.

[0009] Furthermore, the automobile cooling system includes an oil-water heat exchanger bracket, the oil-water heat exchangers of two adjacent motor cooling circuits are connected to the bottom side of the oil-water heat exchanger bracket, and the oil-water heat exchanger bracket is fixed above the inverter to fix the oil-water heat exchanger on the inverter.

[0010] Furthermore, the automobile cooling system includes a vehicle frame, and the wheel hub motor, the motor cooling circuit and the vehicle cooling circuit are all arranged at intervals on the vehicle frame.

[0011] Furthermore, the motor cooling circuit includes: an oil pump, whose oil inlet is connected to the oil outlet of the hub motor, and an oil-water heat exchanger is connected to the oil delivery port of the oil pump; an oil tank, connected between the oil-water heat exchanger and the oil inlet of the hub motor; the oil pump pumps the oil in the hub motor into the oil-water heat exchanger for cooling, and the oil flows back to the hub motor through the oil tank.

[0012] Furthermore, the automobile cooling system includes an oil tank bracket arranged on the vehicle frame, and the oil tank is fixed to the oil tank bracket by a clamp.

[0013] Furthermore, a plurality of first mounting holes are formed on the oil tank bracket, and a first connecting member passes through the first mounting holes and is connected to the vehicle frame to fix the oil tank on the vehicle frame.

[0014] Furthermore, the automobile cooling system includes: an oil pump bracket, the oil pump is fixed to the oil pump bracket through a second connecting member, and a plurality of second mounting holes are opened on the oil pump bracket, and a third connecting member passes through the second mounting holes and is connected to the frame to fix the oil pump to the frame.

[0015] Furthermore, the motor cooling circuit includes an oil inlet circuit provided with an oil tank and an oil outlet circuit provided with an oil pump, the oil outlet of the oil inlet circuit is connected to the oil inlet of the hub motor, and the oil inlet of the oil outlet circuit is connected to the oil outlet of the hub motor.

[0016] An embodiment of the present application also provides an automobile, including the automobile cooling system provided by the embodiment of the present application.

[0017] The beneficial effects of the embodiments of the present invention are:

[0018] First of all, the present application provides an automobile cooling system, which realizes cooling of the hub motor by connecting a motor cooling circuit to each hub motor. On the one hand, it can reduce the space occupied by the hub motor and facilitate installation. On the other hand, it can meet the higher cooling requirements of the hub motor.

[0019] Secondly, the present application further realizes cooling of the hub motor by setting up a whole vehicle cooling circuit, connecting the whole vehicle cooling circuit to each motor cooling circuit, and performing heat exchange with the motor cooling circuit. This can simplify the connecting pipelines while ensuring the cooling effect of the hub motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings required for use in the embodiments of the present application are briefly introduced below.

[0021] Figure 1 This is a schematic diagram of the principle of an automobile cooling system according to an embodiment of the present application;

[0022] Figure 2 This is a schematic structural diagram of an automobile cooling system according to an embodiment of the present application;

[0023] Figure 3 A partial structural schematic diagram of an automobile cooling system according to an embodiment of the present application;

[0024] Figure 4 A schematic diagram of the connection between an oil-water heat exchanger bracket and an inverter of an automobile cooling system shown in one embodiment of the present application;

[0025] Figure 5 This is a schematic diagram of the structure of an oil tank support of an automobile cooling system shown in one embodiment of the present application;

[0026] Figure 6 A schematic diagram of the structure of an oil pump of an automobile cooling system shown in one embodiment of the present application;

[0027] Figure 7 A schematic diagram of the structure of a hub motor of an automobile cooling system shown in one embodiment of the present application.

[0028] Figure numerals: motor cooling circuit 1; oil pump 11; oil tank 12; oil tank bracket 13; oil pump bracket 14; clamp 15; first connecting piece 16; second connecting piece 17; oil inlet oil circuit 18; oil outlet oil circuit 19; vehicle cooling circuit 2; water tank 21; water pump 22; inverter 23; hub motor 3; oil-water heat exchanger 4; oil-water heat exchanger bracket 41; cooling water pipe 5; frame 6. DETAILED DESCRIPTION

[0029] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] The purpose of the present invention is to provide an automobile cooling system to solve the problem that the wheel hub motor occupies too much space in the existing cooling system and cannot meet the high cooling requirements of the wheel hub motor.

[0031] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0032] See also Figure 1 The present application provides a vehicle cooling system, including a plurality of wheel hub motors 3, an oil-water heat exchanger 4, a motor cooling circuit 1, and a vehicle cooling circuit 2. The wheel hub motor 3 refers to the motor used to be integrated into the wheel hub of the vehicle, so the size of the wheel hub motor is relatively high. In one embodiment, the number of wheel hub motors 3 is 4, and at the four wheel hubs of the vehicle, there are respectively a wheel hub motor 3 for the left front wheel and a wheel hub motor 3 for the right front wheel, a wheel hub motor 3 for the left rear wheel, and a wheel hub motor 3 for the right rear wheel.

[0033] Each wheel hub motor 3 is connected to a motor cooling circuit 1 via a cooling oil pipe. The motor cooling circuit 1 is used to cool the wheel hub motor 3 , and an oil-water heat exchanger 4 is provided on the motor cooling circuit 1 .

[0034] The vehicle cooling circuit 2 is connected to each motor cooling circuit 1 , and the vehicle cooling circuit 2 performs heat exchange with the motor cooling circuit 1 through the oil-water heat exchanger 4 of each motor cooling circuit 1 .

[0035] The present application realizes cooling of the hub motor 3 by providing an external motor cooling circuit 1 in each hub motor 3, and connecting the motor cooling circuit 1 with the vehicle cooling circuit 2 for heat exchange. On the one hand, by connecting each hub motor 3 to the motor cooling circuit 1 and coordinating with the vehicle cooling circuit 2 for heat exchange, the hub motor 3 is cooled, which can improve the cooling effect of the hub motor 3 and meet the cooling requirements of the hub motor 3; on the other hand, by connecting the cooling pipeline to the motor cooling circuit 1 to realize external cooling, the overall occupied space of the hub motor 3 can be reduced, the installation is simple, and the cooling requirements of the hub motor 3 can be guaranteed without occupying the space of the hub motor 3.

[0036] In one embodiment, the vehicle cooling circuit 2 includes a water tank 21 , a water pump 22 , and an inverter 23 .

[0037] There is one water tank 21 , which is connected to each oil-water heat exchanger 4 in the motor cooling circuit 1 , and is used to provide a water source and receive water flowing out of the oil-water heat exchanger 4 .

[0038] Two water pumps 22 are provided, and the two water pumps 22 are respectively connected to the water tank 21 for pumping water from the water tank 21 .

[0039] The number of inverters 23 is two, and the two inverters 23 are connected to the two water pumps 22 in a one-to-one correspondence, and the inverters 23 are connected to the oil-water heat exchangers 4 of the two adjacent motor cooling circuits 1. Figure 1 As shown, the inverter 23 on the left can be connected to the oil-water heat exchanger 4 of the motor cooling circuit 1 of the hub motor 3 on the left and right sides of the front wheel; the inverter 23 on the right can be connected to the oil-water heat exchanger 4 of the motor cooling circuit 1 of the hub motor 3 on the left and right sides of the rear wheel.

[0040] Connecting two oil-water heat exchangers 4 through an inverter 23 can not only simplify the structure and reduce costs, but also provide a stable power supply through the inverter 23 to meet the power requirements of the two oil-water heat exchangers 4, ensure the stable operation of the oil-water heat exchanger 4, and thus improve the working efficiency and working performance of the automobile cooling system.

[0041] The water pump 22 is used to extract water from the water tank 21 and pump it into the inverter 23. The flow of water carries the heat generated by the inverter 23 during operation to cool the inverter 23, and then the water flows into the oil-water heat exchanger 4 for heat exchange.

[0042] The automobile cooling system also includes a cooling water pipe 5. The oil-water heat exchanger 4 is connected to the water tank 21 through the cooling water pipe 5. The water after heat exchange in the oil-water heat exchanger 4 flows back to the water tank 21 through the cooling water pipe 5, and then the cooled water is pumped into the inverter 23 through the water pump 22, thereby forming a loop.

[0043] The present application sets a water tank 21 in the vehicle cooling circuit 2, connects one water tank 21 to each oil-water heat exchanger 4 in the motor cooling circuit 1, and sets two water pumps 22 to connect the same water tank 21, and sets two inverters 23 to connect the oil-water heat exchangers 4 of two adjacent motor cooling circuits 1 respectively. Through the above-mentioned setting method, the structure used in the vehicle cooling circuit 2 is simplified first, saving costs, and at the same time, by connecting two motor cooling circuits 1 through an inverter 23, the power output capacity of the system can be improved, ensuring the stable operation of the vehicle cooling system, which is conducive to meeting the cooling requirements of the hub motor 3.

[0044] In one embodiment, the motor cooling circuit 1 further includes an oil pump 11 and an oil tank 12 .

[0045] The oil inlet of the oil pump 11 is connected to the oil outlet of the wheel hub motor 3 , and the oil-water heat exchanger 4 is connected to the oil delivery port of the oil pump 11 . The oil pump 11 is used to extract oil from the wheel hub motor 3 and deliver it to the oil-water heat exchanger 4 .

[0046] like Figure 2 As shown in FIG. 4 , the automobile cooling system includes a vehicle frame 6 , and the wheel hub motor 3 , the motor cooling circuit 1 and the vehicle cooling circuit 2 are all arranged on the vehicle frame 6 at intervals.

[0047] Specifically, the hub motor 3, the oil tank 12, the oil pump 11, the oil-water heat exchanger 4, the water pump 22, the inverter 23 and the water tank 21 are all fixed on the frame 6 at intervals and connected by pipelines. Compared with the prior art of integrating various components into the hub motor 3, the space occupied by the hub motor 3 can be reduced, and the difficulty in arranging the internal structure of the vehicle due to the excessive space occupied and the influence on the cooling effect of the hub motor 3 can be prevented.

[0048] The oil tank 12 is connected to the oil inlet of the oil-water heat exchanger 4 and the wheel hub motor 3 .

[0049] The oil pump 11 pumps the oil in the wheel hub motor 3 into the oil-water heat exchanger 4 for cooling, and the oil flows back into the wheel hub motor 3 through the oil tank 12 .

[0050] The motor cooling circuit 1 specifically includes an oil inlet circuit 18 provided with an oil tank 12 and an oil outlet circuit 19 provided with an oil pump 11. The oil outlet of the oil inlet circuit 18 is connected to the oil inlet of the hub motor 3, and the oil inlet of the oil outlet circuit 19 is connected to the oil outlet of the hub motor 3. Specifically, the oil tank 12 transports oil to the hub motor 3 through the oil inlet circuit 18, and the oil pump 11 transports the oil in the hub motor 3 to the oil-water heat exchanger 4 through the oil outlet circuit 19.

[0051] The automobile cooling system includes an oil-water heat exchanger bracket 41, and the oil-water heat exchangers 4 of two adjacent motor cooling circuits 1 are connected to the bottom side of the oil-water heat exchanger bracket 41. The oil-water heat exchanger bracket 41 is fixed above the inverter 23 to fix the oil-water heat exchanger 4 on the inverter 23.

[0052] By stacking the oil-water heat exchanger 4 and the inverter 23 up and down, on the one hand, the space occupied by the inverter 23 and the oil-water heat exchanger 4 is saved, and the installation space inside the car is reasonably utilized. On the other hand, the pipes connecting the oil-water heat exchanger 4 and the inverter 23 are saved, reducing costs and preventing the pipes from bending, which is conducive to the water flowing out of the inverter 23 flowing directly into the oil-water heat exchanger 4 through the pipes.

[0053] In one embodiment, if Figure 2 and 5 As shown, the automobile cooling system includes an oil tank bracket 13, which is fixed to the vehicle frame 6. The oil tank 12 is locked and fixed to the oil tank bracket 13 by a clamp 15, thereby ensuring the stability and service life of the installation of the oil tank 12 and the stability of the oil supply pipeline connected to the oil tank 12.

[0054] The oil tank bracket 13 is also provided with a plurality of first mounting holes, through which the first connecting member 16 passes through the first mounting holes and is connected to the vehicle frame 6 , so as to fix the oil tank 12 on the vehicle frame 6 .

[0055] In this embodiment, the first connecting member 16 may be a bolt.

[0056] The oil tank 12 is fixed by the oil tank bracket 13 and the first connecting member 16, so that the oil tank 12 can be installed on the inclined structure of the frame 6, which can make full use of the layout space, and the oil tank 12 is placed outside the hub motor 3, so that the oil tank 12 can be replaced at any time, including the structure and size of the oil tank 12. When the oil tank 12 is replaced with a larger size, the use of oil can be increased and the cooling effect can be improved.

[0057] In one embodiment, if Figure 6 As shown, the automobile cooling system includes an oil pump bracket 14, and the oil pump 11 is fixed to the oil pump bracket 14 through a second connecting member 17, and a plurality of second mounting holes are opened on the oil pump bracket 14, and a third connecting member passes through the second mounting holes and is connected to the frame 6 to fix the oil pump 11 on the frame 6.

[0058] In this embodiment, both the second connecting member 17 and the third connecting member can be bolts.

[0059] By setting the oil pump bracket 14 to fix the oil pump 11, the position of the oil pump 11 can be effectively adjusted, thereby changing the height and position of the oil inlet of the oil pump 11, which plays an important role in controlling the oil suction height difference and distance of the oil pump 11. It can ensure that the oil pump 11 can more effectively extract oil from the hub motor 3, avoid the problem of oil suction difficulty or low efficiency due to improper position, and improve the oil suction performance of the oil pump 11.

[0060] By adjusting the position of the oil pump bracket 14, the oil suction angle and direction of the oil pump 11 can be improved, further reducing the resistance during the oil suction process, improving the smoothness of the oil suction, and preventing the oil pump 11 from being worn by collisions with components in the installation space, thereby helping to extend the life of the oil pump 11.

[0061] At the same time, the oil pump bracket 14 is provided to support the oil pump 11, which can play a role in shock absorption and prevent vibration generated when the car is working from affecting the operation of the oil pump 11.

[0062] In summary, the provision of the oil pump bracket 14 can optimize the oil suction stability of the oil pump 11, thereby improving the overall performance and reliability of the automobile cooling system.

[0063] In one embodiment, if Figure 7 As shown, the wheel hub motor 3 is provided with an outwardly extending oil inlet and outlet, which is connected to the oil pump 11 through the outwardly extending oil outlet, and the outwardly extending oil inlet is connected to the oil tank 12, thereby realizing external cooling of the wheel hub motor 3 and reducing the space occupied by the wheel hub motor 3.

[0064] The present invention also provides an automobile, comprising the automobile cooling system provided in the embodiment of the present application.

[0065] A wheel hub motor 3 is arranged at each of the four wheel hubs in the above-mentioned automobile, and there are four wheel hub motors 3 in total. The inverter 23 includes two units, namely a front inverter 23 and a rear inverter 23 . Each wheel hub motor 3 is connected to a motor cooling circuit 1 .

[0066] Because the hub motor 3 is directly installed inside the wheel hub of the car, it must not only meet the multi-operating driving requirements of the car, but also be limited by the installation space and working environment. Therefore, it generally has a higher density and can withstand harsh working conditions such as high temperature and vibration. However, the increase in the overall volume of the hub motor 3 (that is, the oil pump 11, oil tank 12 and oil-water heat exchanger 4 are integrated into the hub motor 3, resulting in an increase in the volume of the hub motor 3) will cause poor air circulation inside the hub, affecting its performance, thereby reducing the life of the hub motor 3 and causing safety problems for the hub motor 3 and the car. Therefore, the cooling system provided by the present invention can also reduce the overall volume of the hub motor 3, thereby avoiding problems affecting motor performance and car safety due to poor air circulation.

[0067] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0069] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automobile cooling system, comprising a plurality of wheel hub motors and an oil-water heat exchanger, characterized in that: The automobile cooling system also includes: A motor cooling circuit, each of the wheel hub motors is connected to the motor cooling circuit via a cooling oil pipe for cooling the wheel hub motor, and the motor cooling circuit is provided with the oil-water heat exchanger; A whole vehicle cooling circuit, wherein the whole vehicle cooling circuit is connected to each of the motor cooling circuits, and the whole vehicle cooling circuit exchanges heat with the motor cooling circuit through an oil-water heat exchanger of each of the motor cooling circuits.

2. The automotive cooling system according to claim 1, characterized in that: The vehicle cooling circuit comprises: Water tank, set to one; There are two water pumps, and the two water pumps are connected to the water tank respectively; Inverters are provided in two numbers, the two inverters are connected to the water pumps in a one-to-one correspondence, and the inverters are connected to the oil-water heat exchangers of two adjacent motor cooling circuits; The water pump is used to extract water from the water tank and pump it into the inverter, and after cooling the inverter, the water flows into the oil-water heat exchanger for heat exchange.

3. The automotive cooling system according to claim 2, characterized in that: The automobile cooling system also includes a cooling water pipe, the oil-water heat exchanger is connected to the water tank through the cooling water pipe, and the water after heat exchange in the oil-water heat exchanger flows back into the water tank through the cooling water pipe.

4. The automotive cooling system according to claim 2, characterized in that: The automobile cooling system includes an oil-water heat exchanger bracket, and the oil-water heat exchangers of two adjacent motor cooling circuits are connected to the bottom side of the oil-water heat exchanger bracket. The oil-water heat exchanger bracket is fixed above the inverter to fix the oil-water heat exchanger on the inverter.

5. The automotive cooling system according to claim 1, characterized in that: The automobile cooling system comprises a vehicle frame, and the wheel hub motor, the motor cooling circuit and the whole vehicle cooling circuit are all arranged at intervals on the vehicle frame.

6. The automotive cooling system according to claim 5, characterized in that: The motor cooling circuit comprises: An oil pump, whose oil inlet is connected to the oil outlet of the hub motor, and the oil-water heat exchanger is connected to the oil delivery port of the oil pump; An oil tank connected to the oil-water heat exchanger and the oil inlet of the hub motor; The oil pump pumps the oil in the wheel hub motor into the oil-water heat exchanger for cooling, and the oil flows back into the wheel hub motor through the oil tank.

7. The automotive cooling system according to claim 6, characterized in that: The automobile cooling system comprises an oil tank bracket arranged on the vehicle frame, and the oil tank is fixed on the oil tank bracket by a clamp.

8. The automotive cooling system according to claim 7, characterized in that: The oil tank bracket is provided with a plurality of first mounting holes, and a first connecting member passes through the first mounting holes and is connected to the vehicle frame so as to fix the oil tank on the vehicle frame.

9. The automotive cooling system according to claim 6, characterized in that: The automobile cooling system comprises: An oil pump bracket, wherein the oil pump is fixed to the oil pump bracket via a second connecting member, and a plurality of second mounting holes are provided on the oil pump bracket, and a third connecting member passes through the second mounting holes and is connected to the vehicle frame to fix the oil pump to the vehicle frame.

10. The automotive cooling system according to claim 6, characterized in that: The motor cooling circuit includes an oil inlet circuit provided with the oil tank and an oil outlet circuit provided with the oil pump, the oil outlet of the oil inlet circuit is connected to the oil inlet of the hub motor, and the oil inlet of the oil outlet circuit is connected to the oil outlet of the hub motor.

11. A car, characterized in that: The invention comprises an automobile cooling system as claimed in any one of claims 1 to 10.

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