A motor liquid cooling system capable of suppressing the gradual attenuation of heat absorption rate along the flow channel direction

Abstract

The present invention discloses a motor liquid cooling system capable of suppressing the gradual attenuation of the heat absorption rate along the flow channel direction, comprising a cylindrical motor stator coil housing, the outer wall of the cylindrical motor housing being integrally provided with a plurality of natural heat dissipation ribs extending along the axial direction in a circular array; the inner wall of the cylindrical motor stator coil housing is used to fix the stator coil unit; this scheme can effectively suppress the problem that the heat absorption efficiency of the liquid cooling flow channel gradually decreases linearly along the flow channel path direction, improves the heat absorption uniformity of any liquid cooling flow channel in the flow channel direction, and avoids the problem of uneven heat dissipation up and down.

Description

Technical Field

[0001] The invention belongs to the field of motor cooling. Background Art

[0002] In a liquid cooling system, a cooling channel is provided inside the heat generating component, and the liquid takes away the heat when flowing through the cooling channel, thereby achieving the effect of efficient active heat dissipation.

[0003] As the coolant in the liquid-cooling channel flows along the length direction, it will continue to absorb heat and take away the heat of the heat-generating components. The heat gradually accumulates as the coolant flows in the liquid-cooling channel, causing the temperature of the coolant in the liquid-cooling channel to gradually and significantly increase along its own flow path. As the temperature of the coolant increases, its efficiency in absorbing heat decreases, causing the heat absorption efficiency of the liquid-cooling channel to gradually decrease linearly along the flow path, ultimately resulting in the problem of uneven heat absorption efficiency in the liquid-cooling channel in the upper and lower flow directions. Summary of the invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a motor liquid cooling system that can suppress the gradual attenuation of the heat absorption rate along the flow channel direction and improve the uniformity of heat absorption in the flow channel path.

[0005] Technical solution: To achieve the above-mentioned purpose, the present invention provides a motor liquid cooling system capable of suppressing the gradual attenuation of the heat absorption rate along the flow channel direction, comprising a cylindrical motor stator coil housing, the outer wall of which is integrally provided with a plurality of natural heat dissipation ribs extending along the axial direction in a circular array; the inner wall of the cylindrical motor stator coil housing is fixed with a stator coil unit;

[0006] A plurality of liquid cooling channels extending along the axis direction are distributed in a circumferential array inside the shell of the cylindrical motor stator coil housing;

[0007] Each natural heat dissipation rib corresponds to a liquid cooling channel in the cylindrical motor stator coil housing. A thermal balance channel extends along the length direction in the natural heat dissipation rib. The upper end of each thermal balance channel is connected to the upper end of the corresponding liquid cooling channel through a connecting hole at the upper end of the cylindrical motor stator coil housing.

[0008] Furthermore, a plurality of protrusions are distributed in an array equidistantly along the length direction on one side of each liquid cooling channel close to the thermal balance channel; a plurality of arc-shaped thermal balance heat exchange tubes are distributed in an array equidistantly along the length direction on one side of the thermal balance channel close to the liquid cooling channel, and each arc-shaped thermal balance heat exchange tube is immersed in the liquid in the thermal balance channel.

[0009] Furthermore, each arc-shaped heat balance heat exchange tube in the heat balance flow channel corresponds to a protrusion in the liquid cooling flow channel; when several protrusions occupy the liquid cooling flow channel, several local narrow channels are formed in the liquid cooling flow channel.

[0010] Furthermore, an upward-facing thermal balance liquid inlet is provided at the upper end of each protrusion, and a thermal balance liquid outlet vertically connected to the local narrow channel a is provided on the side of the protrusion; each arc-shaped thermal balance heat exchange tube contains a thermal balance arc heat exchange channel, and the clockwise end of each thermal balance arc heat exchange channel is connected to the thermal balance liquid outlet on the corresponding protrusion, and the counterclockwise end of each thermal balance arc heat exchange channel is connected to the thermal balance liquid inlet of the corresponding protrusion.

[0011] Furthermore, a plurality of heat exchange fins are integrally provided on the outer wall of each arc-shaped heat balance heat exchange tube.

[0012] Furthermore, the liquid flowing downward in the liquid cooling channel will continue to impact each heat balance liquid inlet head-on, so that the counterclockwise end of each heat balance arc heat exchange channel will continue to form a positive hydraulic impulse;

[0013] The liquid flowing downward in the liquid cooling channel presents a relatively high flow velocity when passing through relatively narrow local narrow channels, so that the clockwise end of each heat balance arc heat exchange channel continuously forms a relatively low pressure environment;

[0014] Under the action of the hydraulic pressure difference, as the coolant in the liquid-cooling channel flows downward, a portion of the coolant will continuously flow from each heat balance liquid inlet into each heat balance circular arc heat exchange channel, and the coolant flowing into each heat balance circular arc heat exchange channel will eventually return from each heat balance liquid outlet in a clockwise direction to each local narrow channel of the liquid-cooling channel.

[0015] Furthermore, an annular liquid collecting tank is provided at the lower end of the cylindrical motor stator coil housing, and an annular diversion tank is integrated on the outer periphery of the annular liquid collecting tank; the annular liquid collecting tank and the annular diversion tank contain an annular liquid accumulation bin and an annular diversion bin respectively; the lower ends of the liquid cooling channels distributed in a circular array are connected to the annular liquid accumulation bin, and the lower ends of the heat balance channels are connected to the annular diversion bin.

[0016] Furthermore, it also includes a cold liquid inlet pipe and a hot liquid outlet pipe; the liquid outlet end of the cold liquid inlet pipe is connected to the annular diversion bin, and the liquid inlet end of the hot liquid outlet pipe is connected to the annular liquid storage bin.

[0017] Beneficial effect: The cooling intensity of the cooling liquid in the liquid-cooling channel of the present invention increases successively due to heat exchange in the process of passing through the local narrow channels distributed from top to bottom from top to bottom. This offsets the original characteristic that the temperature of the cooling liquid in the liquid-cooling channel gradually increases significantly from top to bottom, thereby achieving the purpose of suppressing the trend of the temperature of the cooling liquid in the liquid-cooling channel gradually increasing along the direction of the channel, and further effectively suppressing the problem of the heat absorption efficiency of the liquid-cooling channel gradually decreasing linearly along the direction of the channel path, thereby improving the heat absorption uniformity of any liquid-cooling channel in the direction of the channel, and avoiding the problem of uneven heat dissipation up and down. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a schematic diagram of the overall structure of the vertical cylindrical motor stator coil housing;

[0019] Attached Figure 2 It is a cross-sectional view of a vertical cylindrical motor stator coil housing;

[0020] Attached Figure 3 For attachment Figure 2 aa cross-sectional view;

[0021] Attached Figure 4 For attachment Figure 2 A partial enlarged view of the mark 7;

[0022] Attached Figure 5 For attachment Figure 3 A local enlarged schematic diagram of the mark 6;

[0023] Attached Figure 6 It is a three-dimensional cross-sectional view of a vertical cylindrical motor stator coil housing;

[0024] Attached Figure 7 For attachment Figure 6 An enlarged schematic diagram of the mark 17;

[0025] Attached Figure 8 For attachment Figure 6 An enlarged schematic diagram of the area marked 18 in FIG. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] As attached Figures 1 to 8 A motor liquid cooling system capable of suppressing the gradual attenuation of the heat absorption rate along the flow channel is shown, such as Figure 1, including a vertical cylindrical motor stator coil housing 1, the outer wall of the cylindrical motor stator coil housing 1 is integrally provided with a plurality of natural heat dissipation ribs 2 extending along the axial direction in a circumferential array; the inner wall of the cylindrical motor stator coil housing 1 is coaxially fixed with a stator coil unit 8; the inside of the shell of the cylindrical motor stator coil housing 1 is provided with a plurality of liquid cooling channels 13 extending along the axial direction in a circumferential array; each natural heat dissipation rib 2 corresponds to a liquid cooling channel 13 in the cylindrical motor stator coil housing 1, and a heat balance channel 11 extends in the length direction in the natural heat dissipation rib 2, and the upper end of each heat balance channel 11 is aligned with the corresponding liquid cooling channel The upper end of 13 is connected through the connecting hole 19 at the upper end of the cylindrical motor stator coil housing 1; since most of the area of ​​the natural heat dissipation rib 2 is in contact with the air, the heat dissipation process is slow, and the thermal balance flow channel 11 in the natural heat dissipation rib 2 is not inside the cylindrical motor stator coil housing 1, the coolant flowing through the thermal balance flow channel 11 will not directly absorb the heat generated by the stator coil unit 8, and its function is mainly used for thermal balance, which will be described in detail later; at the same time, since there is a thermal balance flow channel 11 in the natural heat dissipation rib 2 where the coolant continuously flows, the temperature of the natural heat dissipation rib 2 will not rise to a length that is hot to the touch, and the user will not be burned even if he touches it with his hand.

[0028] like Figure 1 and 2 The lower end of the cylindrical motor stator coil housing 1 is integrated with an annular liquid collecting box 6, and the outer periphery of the annular liquid collecting box 6 is integrated with an annular diverter box 3; the annular liquid collecting box 6 and the annular diverter box 3 respectively contain an annular liquid storage bin 14 and an annular diverter bin 15, and also include a cold liquid inlet pipe 4 and a hot liquid outlet pipe 5; the liquid outlet end of the cold liquid inlet pipe 4 is connected to the annular diverter bin 15, and the liquid inlet end of the hot liquid outlet pipe 5 is connected to the annular liquid storage bin 14; the lower ends of the liquid cooling channels 13 distributed in a circular array are all connected to the annular liquid storage bin 14, and the lower ends of the heat balance channels 11 are all connected to the annular diverter bin 15; the overall liquid flow direction is as follows: under the action of the external liquid pump, the cold coolant The cooling liquid is continuously pressed into the annular diversion chamber 15 through the cooling liquid inlet pipe 4. Driven by the liquid pump, the cooling liquid entering the annular diversion chamber 15 is diverted to the lower end of the thermal balance channel 11 in each natural heat dissipation rib 2 and flows upward, so that an upward-flowing liquid is continuously formed in the thermal balance channel 11. Then, the cooling liquid flowing upward to the upper end of the thermal balance channel 11 flows through the connecting hole 19 to the upper end of the corresponding liquid cooling channel 13, so that a continuously downward-flowing cooling liquid is formed in the liquid cooling channel 13. Then, the cooling liquid in each liquid cooling channel 13 flows downward and is collected in the annular liquid storage chamber 14. Finally, the hot cooling liquid in the annular liquid storage chamber 14 is discharged through the hot liquid outlet pipe 5.

[0029] like Figure 4 , 5, 7, 8; a plurality of protrusions 10.1 are arranged in an equidistant array along the length direction on one side of each liquid-cooling channel 13 close to the heat-balancing channel 11; a plurality of arc-shaped heat-balancing heat exchange tubes 10 are arranged in an equidistant array along the length direction on one side of the heat-balancing channel 11 close to the liquid-cooling channel 13, and a plurality of heat-exchange fins 20 are integrally arranged on the outer wall of each arc-shaped heat-balancing heat exchange tube 10, and both the arc-shaped heat-balancing heat exchange tube 10 and the heat-exchange fins 20 are made of a heat-conducting material containing copper, and each arc-shaped heat-balancing heat exchange tube 10 is immersed in the liquid in the heat-balancing channel 11; each arc-shaped heat-balancing heat exchange tube 10 in the heat-balancing channel 11 corresponds to a protrusion in the liquid-cooling channel 13 Block 10.1; when the liquid-cooling channel 13 is occupied by a plurality of protrusions 10.1, a plurality of local narrow channels 13a are formed in the liquid-cooling channel 13; an upward heat balance liquid inlet 21 is provided at the upper end of each protrusion 10.1, and a heat balance liquid outlet 22 vertically connected to the local narrow channel 13a is provided at the side of the protrusion 10.1; a heat balance circular arc heat exchange channel 30 is provided in each arc-shaped heat balance heat exchange tube 10, and a clockwise end of each heat balance circular arc heat exchange channel 30 is connected to the heat balance liquid outlet 22 on the corresponding protrusion 10.1, and a counterclockwise end of each heat balance circular arc heat exchange channel 30 is connected to the heat balance liquid inlet 21 of the corresponding protrusion 10.1.

[0030] Working principle:

[0031] When the motor is running, the stator coil unit 8 will continuously generate heat due to the electrothermal effect, and the heat will be continuously transferred to the cylindrical motor stator coil housing 1 in the form of heat conduction, so that the cylindrical motor stator coil housing 1 is in a state of continuous heating;

[0032] Under the action of the external liquid pump, the cold coolant is continuously pressed into the annular diversion chamber 15 through the cold liquid inlet pipe 4. Driven by the liquid pump, the coolant entering the annular diversion chamber 15 is diverted to the lower end of the thermal balance channel 11 in each natural heat dissipation rib 2 and flows upward, so that an upward-flowing liquid is continuously formed in the thermal balance channel 11. Then, the cooling liquid flowing upward to the upper end of the thermal balance channel 11 flows through the connecting hole 19 to the upper end of the corresponding liquid cooling channel 13, thereby forming a coolant that continuously flows downward in the liquid cooling channel 13. Then, the coolant in each liquid cooling channel 13 flows downward and is collected in the annular liquid accumulation chamber 14. Finally, the hot coolant in the annular liquid accumulation chamber 14 is discharged through the hot liquid outlet pipe 5.

[0033] Under normal circumstances, the coolant in the liquid-cooling channel 13 will continue to absorb heat and take away the heat on the cylindrical motor stator coil housing 1 which is in a uniformly heated state as it gradually flows downward. The heat gradually accumulates as the coolant flows downward in the liquid-cooling channel 13, so that the temperature of the coolant in any liquid-cooling channel 13 gradually increases significantly from top to bottom. Since the higher the temperature of the coolant, the lower its efficiency in absorbing heat, the heat absorption efficiency of any liquid-cooling channel 13 gradually decreases linearly along the channel path direction, and finally causes any liquid-cooling channel 13 to have uneven heat absorption efficiency in the upper and lower directions of the channel.

[0034] In the present solution, since the direction of the heat balance liquid inlet 21 on each protrusion 10.1 is opposite to the flow direction of the liquid in the liquid cooling channel 13, the liquid flowing downward in the liquid cooling channel 13 will continue to impact each heat balance liquid inlet 21 downward, so that the counterclockwise end of each heat balance arc heat exchange channel 30 will continue to form a positive hydraulic impulse; at the same time, the liquid flowing downward in the liquid cooling channel 13 will present a relatively high flow rate when passing through the relatively narrow local narrow channels 13a. According to the Bernoulli equation of fluid mechanics, under the same conditions, the higher the flow rate, the lower the pressure at the location, and each heat balance liquid outlet 22 just vertically connects to each high-flow local narrow channel 13a, so that the clockwise end of each heat balance arc heat exchange channel 30 continues to form a relatively low-pressure environment;

[0035] Therefore, under the action of the hydraulic pressure difference, during the process of the coolant in the liquid-cooling channel 13 flowing downward, a part of the coolant will continuously flow from each heat balance liquid inlet 21 into each heat balance circular arc heat exchange channel 30, and the coolant flowing into each heat balance circular arc heat exchange channel 30 will eventually return to each local narrow channel 13a of the liquid-cooling channel 13 from each heat balance liquid outlet 22 in a clockwise direction. During the process of the coolant flowing through each heat balance circular arc heat exchange channel 30, the heat will be transferred to the cooler coolant flowing upward in the heat balance channel 11 through the heat exchange fins 20 to reduce the temperature;

[0036] As the coolant in the liquid cooling channel 13 continues to flow downward, it will successively pass through the local narrow channels 13a distributed from top to bottom; as the coolant in the liquid cooling channel 13 continues to flow downward, each time it passes through a local narrow channel 13a, it will perform a heat exchange with the coolant in the heat balance channel 11 at the same height under the action of the arc-shaped heat balance heat exchange tube 10 at the same height, and the temperature will be reduced once;

[0037] Since the coolant in the heat balance flow channel 11 always flows from bottom to top, the temperature of the coolant in the heat balance flow channel 11 gradually decreases from top to bottom, and the heat exchange efficiency of the arc-shaped heat balance heat exchange tubes 10 arranged in an array from top to bottom increases from top to bottom.

[0038] Therefore, the cooling intensity of the cooling liquid in the liquid-cooling channel 13 due to heat exchange increases successively in the process of passing through the local narrow channels 13a distributed from top to bottom from top to bottom. This offsets the original characteristic that the temperature of the cooling liquid in the liquid-cooling channel 13 gradually increases from top to bottom, thereby achieving the purpose of suppressing the trend of the temperature of the cooling liquid in the liquid-cooling channel 13 gradually increasing along the channel direction, and further effectively suppressing the problem of the heat absorption efficiency of the liquid-cooling channel 13 gradually decreasing linearly along the channel path direction, thereby improving the heat absorption uniformity of any liquid-cooling channel 13 in the channel direction and avoiding the problem of uneven heat dissipation from top to bottom.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A motor liquid cooling system capable of suppressing the gradual attenuation of heat absorption rate along the flow channel direction, comprising a cylindrical motor stator coil housing (1), the outer wall of the cylindrical motor stator coil housing (1) being integrally provided with a plurality of natural heat dissipation ribs (2) extending along the axial direction in a circumferential array; a stator coil unit (8) is fixed on the inner wall of the cylindrical motor stator coil housing (1); Features: A plurality of liquid cooling channels (13) extending along the axial direction are distributed in a circular array inside the shell of the cylindrical motor stator coil housing (1); Each natural heat dissipation rib (2) corresponds to a liquid cooling channel (13) in the cylindrical motor stator coil housing (1), a heat balance channel (11) extending in the length direction in the natural heat dissipation rib (2), and the upper end of each heat balance channel (11) is connected to the upper end of the corresponding liquid cooling channel (13) through a connecting hole (19) at the upper end of the cylindrical motor stator coil housing (1); A plurality of protrusions (10.1) are arranged in an array at equal intervals along the length direction on one side of each of the liquid cooling channels (13) close to the heat balance channel (11); a plurality of arc-shaped heat balance heat exchange tubes (10) are arranged in an array at equal intervals along the length direction on one side of the heat balance channel (11) close to the liquid cooling channel (13), and each of the arc-shaped heat balance heat exchange tubes (10) is immersed in the liquid in the heat balance channel (11); Each arc-shaped heat balance heat exchange tube (10) in the heat balance flow channel (11) corresponds to a protrusion (10.1) in the liquid cooling flow channel (13); when the protrusions (10.1) are in position, a plurality of local narrow channels (13a) are formed in the liquid cooling flow channel (13); The upper end of each of the protrusions (10.1) is provided with an upwardly directed heat balance liquid inlet (21), and the side of the protrusion (10.1) is provided with a heat balance liquid outlet (22) vertically connected to the local narrow channel (13a); each of the arc-shaped heat balance heat exchange tubes (10) contains a heat balance arc heat exchange channel (30), the clockwise end of each of the heat balance arc heat exchange channels (30) is connected to the heat balance liquid outlet (22) on the corresponding protrusion (10.1), and the counterclockwise end of each of the heat balance arc heat exchange channels (30) is connected to the heat balance liquid inlet (21) of the corresponding protrusion (10.1).

2. A motor liquid cooling system capable of suppressing the gradual attenuation of heat absorption rate along the flow channel according to claim 1, characterized in that: The outer wall of each of the arc-shaped heat balance heat exchange tubes (10) is integrally provided with a plurality of heat exchange fins (20).

3. A motor liquid cooling system capable of suppressing the gradual attenuation of heat absorption rate along the flow channel according to claim 2, characterized in that: The liquid flowing downward in the liquid cooling channel (13) will continuously impact each heat balance liquid inlet (21) downward, thereby causing the counterclockwise end of each heat balance arc heat exchange channel (30) to continuously form a positive hydraulic impulse; The liquid flowing downward in the liquid cooling channel (13) exhibits a relatively high flow velocity when passing through the relatively narrow local narrow channels (13a), so that the clockwise end of each heat balance arc heat exchange channel (30) continuously forms a relatively low pressure environment; Under the action of the hydraulic pressure difference, as the coolant in the liquid cooling channel (13) flows downward, a portion of the coolant will continuously flow from each heat balance liquid inlet (21) into each heat balance circular arc heat exchange channel (30), and the coolant flowing into each heat balance circular arc heat exchange channel (30) will eventually return from each heat balance liquid outlet (22) in a clockwise direction to each local narrow channel (13a) of the liquid cooling channel (13).

4. The motor liquid cooling system capable of suppressing the gradual attenuation of the heat absorption rate along the flow channel according to claim 1, characterized in that: The lower end of the cylindrical motor stator coil housing (1) is provided with an annular liquid collecting box (6), and the outer periphery of the annular liquid collecting box (6) is integrally provided with an annular flow diversion box (3); the annular liquid collecting box (6) and the annular flow diversion box (3) respectively contain an annular liquid storage bin (14) and an annular flow diversion bin (15); the lower ends of the liquid cooling channels (13) distributed in a circular array are all connected to the annular liquid storage bin (14), and the lower ends of the thermal balance channels (11) are all connected to the annular flow diversion bin (15).

5. A motor liquid cooling system capable of suppressing the gradual attenuation of heat absorption rate along the flow channel according to claim 4, characterized in that: It also includes a cold liquid inlet pipe (4) and a hot liquid outlet pipe (5); the liquid outlet end of the cold liquid inlet pipe (4) is connected to the annular diversion chamber (15), and the liquid inlet end of the hot liquid outlet pipe (5) is connected to the annular liquid storage chamber (14).

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