Vortex pump

Abstract

We provide technology to improve the cooling performance of motors. [Solution] The vortex pump 1000 comprises a motor 10 having a motor shaft 12, a pump casing, an impeller, and a cooling fan 100. On the opposing surface 210 of the motor 10 facing the cooling fan 100, there are a plurality of first ventilation holes 212 arranged in an arc centered on the central axis of the motor shaft 12, and a plurality of second ventilation holes 214 arranged along the first ventilation holes 212. The motor 10 is provided with a plurality of first ventilation holes 212, a plurality of second ventilation holes 214, and through holes 220 that communicate with each other inside the motor 10.

Description

Technical Field

[0001] The present disclosure relates to a vortex pump operated by a motor.

Background Art

[0002] A vortex pump generates a water flow by rotating an impeller with a motor. Also, the vortex pump cools the motor with a cooling fan (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] During pump operation, it is necessary to suppress motor heat generation, and it is required to further improve the motor cooling performance by the cooling fan.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide a technique for improving the cooling performance of a motor.

Means for Solving the Problems

[0006] To solve the above problems, a vortex pump according to one embodiment of the present disclosure includes a motor having a motor shaft extending toward a first end and a second end in opposite directions, a pump casing connected to the motor while passing through the second end of the motor shaft, an impeller mounted on the second end of the motor shaft within the pump casing and rotating by the rotation of the motor shaft, and a cooling fan mounted on the first end of the motor shaft and rotating by the rotation of the motor shaft. On the surface of the motor facing the cooling fan, a plurality of first ventilation holes arranged in an arc around the central axis of the motor shaft and a plurality of second ventilation holes arranged along the plurality of first ventilation holes are provided, and the motor is provided with through holes that communicate with the plurality of first ventilation holes and the plurality of second ventilation holes inside the motor. [Effects of the Invention]

[0007] According to this disclosure, the cooling performance of the motor can be improved. [Brief explanation of the drawing]

[0008] [Figure 1] Figures 1(a) and 1(b) are exploded perspective views showing the configuration of the vortex pump according to this embodiment. [Figure 2] Figures 2(a)-(b) are cross-sectional views showing the configuration of the vortex pump shown in Figures 1(a)-(b). [Figure 3] Figures 3(a)-(b) are perspective views showing the configuration of the cooling fan shown in Figures 1(a)-(b). [Figure 4] Figures 4(a)-(c) show the configuration of the cooling fan shown in Figures 3(a)-(b). [Figure 5] Figures 5(a)-(b) show the configuration of the vortex pump shown in Figures 1(a)-(b). [Modes for carrying out the invention]

[0009] Hereinafter, embodiments for implementing this disclosure will be described with reference to the attached drawings. The embodiments described below all represent preferred specific examples of this disclosure. Therefore, the numerical values, shapes, materials, components, arrangement and connection configurations of components, as well as the steps (processes) and the order of steps shown in the following embodiments are examples and are not intended to limit this disclosure. Accordingly, among the components in the following embodiments, components that are not described in the independent claims representing the highest-level concept of this disclosure will be described as arbitrary components. In addition, substantially identical components are denoted by the same reference numerals in each figure, and redundant explanations are omitted or simplified.

[0010] Furthermore, while terms including ordinal numbers such as "first" and "second" are used to describe various components, these terms are used solely to distinguish one component from others, and the components are not limited by these terms. Below, this embodiment will be described in the following order: (1) overall configuration, (2) cooling fan, and (3) cooling structure.

[0011] (1) Overall structure Figures 1(a) and 1(b) are exploded perspective views showing the configuration of the vortex pump 1000. The vortex pump 1000 includes a motor 10, a pump casing 30, an impeller 50, a cover 52, a fan cover 70, and a cooling fan 100. If the direction from the motor 10 towards the cooling fan 100 is defined as the "first direction D1", then the direction from the motor 10 towards the impeller 50 is defined as the "second direction D2". In other words, the first direction D1 and the second direction D2 are opposite directions. Figure 1(a) is an exploded perspective view of the vortex pump 1000 as seen from the second direction D2 side, and Figure 1(b) is an exploded perspective view of the vortex pump 1000 as seen from the first direction D1 side.

[0012] The motor 10 is, for example, a DC brushless motor and has a rod-shaped motor shaft 12 extending in a first direction D1 and a second direction D2. The end of the motor shaft 12 on the first direction D1 side is the first end 14, and the end on the second direction D2 side is the second end 16.

[0013] A pump casing 30 is connected to the second direction D2 side of the motor 10. The pump casing 30 is provided with a vortex chamber 32 that is open toward the second direction D2 side. The motor shaft 12 passes through the vortex chamber 32, and the second end 16 side of the motor shaft 12 is exposed from the vortex chamber 32. The vortex chamber 32 houses the impeller 50, which is attached to the second end 16 side of the motor shaft 12.

[0014] When the impeller 50 is housed in the vortex chamber 32, one of the main surfaces of the impeller 50 is exposed. Therefore, as shown in Figure 1(a), a cover 52 is attached to the pump casing 30 so as to cover the impeller 50. The pump casing 30 is also equipped with a suction port 34 and a discharge port 36, to which piping (not shown) is attached. When the impeller 50 rotates due to the rotation of the motor shaft 12, liquid is drawn into the pump casing 30 from the suction port 34, and the drawn-in liquid is discharged from the discharge port 36.

[0015] A cooling fan 100 is attached to the first end 14 of the motor shaft 12 on the first direction D1 side of the motor 10. The cooling fan 100 rotates with the rotation of the motor shaft 12. A fan cover 70 is also attached to the motor 10 so as to cover the cooling fan 100. A part of the fan cover 70 is slightly larger than the motor 10, and when viewed from the second direction D2 side, there is a gap 72 between the motor 10 and the fan cover 70 (see Figure 2(a)).

[0016] Figures 2(a)-(b) are cross-sectional views showing the configuration of the vortex pump 1000. Figure 2(a) is a cross-sectional view taken along the line A-A of Figure 1(a). As described above, the motor 10 has a motor shaft 12 extending in the first direction D1 and the second direction D2. A rotor 202 of a high-performance magnet is fixed to the motor shaft 12. The rotor 202 is rotatable about the motor shaft 12. A motor coil 200 is arranged so as to surround the rotor 202. The motor coil 200 is a stator made of electromagnetic steel sheets, and coils (copper wires) are annularly coupled. As described above, an impeller 50 is connected to the second end 16 side of the motor shaft 12, and a cooling fan 100 is connected to the first end 14 side of the motor shaft 12.

[0017] Figure 2(b) is a cross-sectional view taken along the line B-B of Figure 1(a). Inside the pump casing 30, a volute chamber 32 for rotatably housing the impeller 50, a suction flow path 300 for guiding the liquid sucked from the suction port 34 to the volute chamber 32, and a gas-liquid separation chamber 302 are formed. The gas-liquid separation chamber 302 guides the liquid from the volute chamber 32 to the discharge port 36 and removes the air bubbles 326 in the liquid, as will be described later.

[0018] The volute chamber 32 is formed in the lower part of the pump casing 30, specifically, it is disposed below the suction port 34, the discharge port 36, and the injection port 306. That is, the pump casing 30 includes a volute chamber 32 in which the impeller 50 is housed, and in the installed state, the volute chamber 32 is installed below the discharge port 36. In the volute chamber 32, a volute flow path 304 formed in an arc shape is formed at a portion corresponding to the outer peripheral portion of the impeller 50. The volute flow path 304 has one end as the suction side and the other end as the discharge side, and is formed by substantially surrounding the outer periphery of the impeller 50.

[0019] The suction flow path 300 is a flow path extending vertically inside the pump casing 30. The upper end thereof communicates with the suction port 34, and the lower end communicates with one end of the volute flow path 304.

[0020] The impeller 50 is a rotating body having blades 308 for imparting energy to the liquid by rotation. Also, as described above, the impeller 50 is connected to the motor shaft 12 of the motor 10. That is, the impeller 50 rotates with the motor 10 as a drive source. When the impeller 50 rotates, the liquid in the volute chamber 32 is discharged into the gas-liquid separation chamber 302 by the plurality of blades 308 of the impeller 50.

[0021] The gas-liquid separation chamber 302 is disposed above the volute chamber 32 and has a substantially trapezoidal cross-sectional shape with an upper base wider than the lower base. The lower part of the gas-liquid separation chamber 302 communicates with the other end of the volute chamber flow path 304. In the lower region of the gas-liquid separation chamber 302, a wall portion 310 is provided on the upstream side and the downstream side in the rotational direction Y1 of the impeller 50 facing this region, dividing this region into two. The wall portion 310 forms two flow paths in the gas-liquid separation chamber 302. That is, in the region of the gas-liquid separation chamber 302 on the volute chamber 32 side, a wall portion 310 is provided that divides this region into an upstream flow path and a downstream flow path in the rotational direction Y1 of the impeller 50. In this embodiment, the side closer to the suction flow path 300 is the downstream side in the rotational direction of the impeller 50, and the side farther from the suction flow path 300 is the upstream side in the rotational direction of the impeller 50. The wall portion 310 is a plate-like wall body and is disposed in the gas-liquid separation chamber 302 such that the longitudinal direction of the wall portion 310 is along the vertical direction. Therefore, the two flow paths formed by the wall portion 310 also form paths along the vertical direction. The volute chamber 32 and the gas-liquid separation chamber 302 communicate with each other through the gas-liquid separation chamber inlet 312 on the downstream side of the wall portion 310 and the volute chamber return port 20 on the upstream side of the wall portion 310.

[0022] The gas-liquid separation chamber 302 is composed of a first side surface 320 and a second side surface 322 as the surfaces on the gas-liquid separation chamber inlet 312 side.

[0023] The upper part of the gas-liquid separation chamber 302 is provided with a ceiling surface 324 that connects to an inlet 306 and a discharge port 36 into which priming water necessary for self-priming is poured. A removable plug (not shown) is attached to the inlet 306. The inlet 306 is located on the ceiling surface 324 of the gas-liquid separation chamber 302, at the end closer to the suction port 34, and the discharge port 36 is located on the ceiling surface 324, at the end further away from the suction port 34.

[0024] Next, the operation of the vortex pump 1000 will be explained based on Figures 2(a)-(b). First, the operator pours priming water (liquid) into the inlet 306 to fill the vortex chamber 32 and the gas-liquid separation chamber 302 with liquid, and plugs the inlet 306. Then, the operator supplies power to the motor 10. When the motor 10 receives power and the position of the rotor 202 is detected by a Hall element (not shown), it sends current to the motor coil 200, and applies a magnetic field by switching this coil current, thereby rotating the rotor 202. As the rotor 202 is driven, the motor shaft 12 rotates, and the impeller 50 attached to the motor shaft 12 rotates. The rotation of the impeller 50 causes air to be drawn into the piping from the suction port 34 through the suction passage 300.

[0025] The liquid and gas drawn in from the suction port 34 flow into the vortex chamber channel 304 of the vortex chamber 32 via the suction channel 300 (see liquid and gas flow Y2). In the vortex chamber channel 304, the gas in the piping is mixed with the liquid by the rotation of the impeller 50 and the circulation of the liquid to form bubbles 326. The liquid containing the bubbles 326 in the vortex chamber channel 304 is guided by the rotation of the impeller 50 to the gas-liquid separation chamber inlet 312 and discharged into the gas-liquid separation chamber 302 (see liquid flow Y3). In the gas-liquid separation chamber 302, some of the bubbles 326 contained in the liquid are separated from the flow, and the separated bubbles 326 are discharged from the discharge port 36 by buoyancy (see bubble discharge direction Y5). The remaining liquid circulates within the gas-liquid separation chamber 302 or returns to the vortex chamber 32 through the vortex chamber return port 20. The continuous action of expelling bubbles 326 increases the vacuum level inside the pipe, raising the water level inside the pipe (self-priming).

[0026] Liquid flows from the suction port 34 into the vortex chamber 32 via the suction passage 300, and when the gas-liquid separation chamber 302 is filled with liquid, the liquid is discharged from the discharge port 36 and the system switches to normal operation. The time from the start of operation of the vortex pump 1000 until the liquid is drawn up to the installation position of the vortex pump 1000 is the self-priming time. On the other hand, when the motor coil 200 heats up due to the energization, heat is conducted to the rotor 202, so forced cooling from the outside is necessary. For this reason, the cooling fan 100 attached to the motor shaft 12 rotates, and the motor 10 is cooled by the airflow from the cooling fan 100.

[0027] (2) Cooling fan The cooling fan 100 is required to blow air not only in the centrifugal direction but also in the second direction D2, i.e., the axial flow direction, by rotating a unidirectional axis. Figures 3(a) and 3(b) are perspective views showing the configuration of the cooling fan 100. Figure 3(a) is a perspective view of the cooling fan 100 seen from the first direction D1 side, and Figure 3(b) is a perspective view of the cooling fan 100 seen from the second direction D2 side. Figures 4(a) and 4(c) show the configuration of the cooling fan 100. Figure 4(a) shows the configuration of the cooling fan 100 seen from the first direction D1, Figure 4(b) is a cross-sectional view of Figure 4(a), and Figure 4(c) shows the configuration of the cooling fan 100 seen from the second direction D2.

[0028] The boss 102 is cylindrical and extends from the main plate 120 (described later) in a first direction D1. A through hole 104 is located in the center of the boss 102, and the cooling fan 100 is connected to the motor shaft 12 by inserting the motor shaft 12 into the through hole 104.

[0029] The main plate 120 extends outward from the portion of the boss 102 on the second direction D2 side and has an annular plate shape. The surface of the main plate 120 facing the first direction D1 is the first surface 122, and the surface of the main plate 120 facing the second direction D2 is the second surface 124. The first surface 122 and the second surface 124 face in opposite directions along the central axis of the boss 102.

[0030] The first ring 140 has an annular plate shape that surrounds the outer edge of the main plate 120. The first ring 140 includes a first parallel surface 142 and a first inclined surface 144. The first parallel surface 142 is positioned on the side of the main plate 120 in a first direction D1 and is substantially parallel to the main plate 120. The first inclined surface 144 is inclined in a second direction D2 from the outer edge of the first parallel surface 142. For example, a bent surface is formed at the portion where the first parallel surface 142 and the first inclined surface 144 connect.

[0031] The second ring 160 has an annular plate shape that surrounds the outer edge of the first ring 140. The second ring 160 includes a second parallel surface 162 and a second inclined surface 164. The second parallel surface 162 is positioned on the first direction D1 side of the first parallel surface 142 and is substantially parallel to the main plate 120. The second inclined surface 164 is inclined in the second direction D2 from the outer edge of the second parallel surface 162. For example, a bent surface is formed at the connection point between the second parallel surface 162 and the second inclined surface 164.

[0032] Multiple blades 180 extend substantially radially from the main plate 120 to the second ring 160, connected to the first ring 140. Here, the number of blades 180 is "7", but is not limited to this. The blades 180 include inner blades 186 and outer blades 188. The inner blades 186 are the portion that extends from the boss 102 to the outer edge of the main plate 120, and the outer blades 188 are the portion that extends from the outer edge of the main plate 120 to the second ring 160. The inner blades 186 have a convex shape towards the front side in the rotation direction R of the blade 308, and the outer blades 188 have a convex shape towards the rear side in the rotation direction R of the blade 308.

[0033] Blade 180 is also positioned in a first portion 182, which is the second-direction side portion of the first ring 140, and in a second portion 184, which is the portion between the first ring 140 and the second ring 160. The first portion 182 and the second portion 184 are also called the second-direction side blade 190. Therefore, the second-direction side blade 190 is part of blade 180. The second-direction side blade 190 has a convex shape towards the rear in the rotation direction R of the blade 308.

[0034] When the cooling fan 100, configured as described above, rotates around the central axis of the motor shaft 12 (not shown), the airflow directed in the second direction D2 collides with the first surface 122, the first parallel surface 142, and the second parallel surface 162, and turns centrifugal along the first surface 122, the first parallel surface 142, and the second parallel surface 162. Subsequently, the airflow moves centrifugally along the first surface 122, the first parallel surface 142, and the second parallel surface 162, and changes direction to the second direction D2 by the first inclined surface 144 and the second inclined surface 164. In other words, the airflow turns from centrifugal to the second direction D2 along the first part 182 and the second part 184. In this way, the cooling fan 100 blows air in the centrifugal direction and the second direction D2. Furthermore, the cooling fan 100 blows air in the centrifugal direction by the first direction side blade 192, which is part of the blade 180. The first direction blade 192 is located on the first direction D1 side of the blade 180 relative to the second ring 160. The air blown in the centrifugal direction flows through the gap 72 between the motor 10 and the fan cover 70, along the outer surface of the motor 10.

[0035] Here, since the second part 184 is positioned further out than the first part 182, the airflow rate of the second part 184 tends to be higher than that of the first part 182. In this embodiment, when the distance in the first direction D1 between the main plate 120 and the first ring 140 is defined as "first direction D1", and the distance in the first direction D1 between the first ring 140 and the second ring 160 is defined as "second direction D2", the first direction D1 is made larger than the second direction D2. By making the second direction D2 larger than the first direction D1, the resistance when passing through the second part 184 becomes greater than the resistance when passing through the first part 182, so that the airflow rate of the second part 184 and the airflow rate of the first part 182 become closer to uniform. As the airflow rate of the second part 184 and the airflow rate of the first part 182 become closer to uniform, the airflow in the second direction D2 becomes closer to a straight line.

[0036] (3) Cooling structure The aforementioned cooling fan 100 directs the airflow in the second direction D2, that is, towards the motor 10. Here, we will explain how to improve the cooling performance of the motor 10 by utilizing this airflow.

[0037] Figures 5(a) and 5(b) show the configuration of the vortex pump 1000. Figure 5(a) is an enlarged cross-sectional view of area A in Figure 2(a). Figure 5(b) shows the opposing surface 210 in Figure 5(a). The opposing surface 210 is the surface of the motor 10 that faces the cooling fan 100. The opposing surface 210 has a circular shape, and a through hole 216 is provided in the center of the opposing surface 210. The motor shaft 12 is inserted into the through hole 216.

[0038] On the opposing surface 210, a plurality of first ventilation holes 212 and a plurality of second ventilation holes 214 are arranged in an arc centered on the central axis of the motor shaft 12. Specifically, a plurality of first ventilation holes 212 are arranged in a row on the inside, and a plurality of second ventilation holes 214 are arranged in a row on the outside. It can also be said that the plurality of second ventilation holes 214 are arranged along the plurality of first ventilation holes 212.

[0039] Here, the multiple first ventilation holes 212 are positioned opposite the first portion 182 of the cooling fan 100, and the multiple second ventilation holes 214 are positioned opposite the second portion 184 of the cooling fan 100. Furthermore, inside the motor 10, the multiple first portions 182 are positioned opposite the motor coil 200, and the multiple second portions 184 are positioned on the outer circumference of the motor coil 200. In addition, a through hole 220 is provided on the lower surface of the motor 10, and the through hole 220 communicates with the multiple first ventilation holes 212 and the multiple second ventilation holes 214 inside the motor 10.

[0040] With this configuration, the rotation of the cooling fan 100 causes airflow from the first part 182 of the cooling fan 100 toward the second direction D2 to enter the motor 10 through the multiple first ventilation holes 212 and collide with the motor coil 200 inside the motor 10. The motor coil 200 is cooled by the collision of the airflow. On the other hand, the rotation of the cooling fan 100 causes airflow from the second part 184 of the cooling fan 100 toward the second direction D2 to enter the motor 10 through the multiple second ventilation holes 214, pass around the outer circumference of the motor coil 200, and is blown out to the outside through the through hole 220. As this airflow passes around the outer circumference of the motor coil 200, it guides the air that collides with the motor coil 200 and blows it out to the outside through the through hole 220. As a result, the air that has been heated by colliding with the motor coil 200 is also blown out of the cooling fan 100.

[0041] As shown in Figure 5(b), the number of first ventilation holes 212 located on the opposing surface 210 is "5", and the number of second ventilation holes 214 located on the opposing surface 210 is "7". The number of first ventilation holes 212 and second ventilation holes 214 are not limited to these, but the number of second ventilation holes 214 is greater than the number of first ventilation holes 212. Since the opening area of ​​one first ventilation hole 212 is the same as the opening area of ​​one second ventilation hole 214, the opening area of ​​multiple second ventilation holes 214 is greater than the opening area of ​​multiple first ventilation holes 212. This is to allow air to be smoothly blown out from the through holes 220. Since the opening area of ​​multiple second ventilation holes 214 only needs to be larger than the opening area of ​​multiple first ventilation holes 212, the number of second ventilation holes 214 can be the same as the number of first ventilation holes 212, and the opening area of ​​one second ventilation hole 214 can be larger than the opening area of ​​one first ventilation hole 212.

[0042] In this embodiment, air is blown in the centrifugal direction by the main plate 120, the first parallel surface 142, and the second parallel surface 162, and in the second direction D2 by the first inclined surface 144 and the second inclined surface 164, so that air can be blown in both the centrifugal and axial directions by the rotation of a unidirectional axis. Also, since the blades 180 are also arranged in the first part 182 and the second part 184, the centrifugal flow is changed to the second direction D2, so that air can be blown in both the centrifugal and axial directions by the rotation of a unidirectional axis. Furthermore, since the first interval 130 is larger than the second interval 132, air can be blown uniformly in the second direction D2.

[0043] Furthermore, since the inner blade 186 has a convex shape towards the front in the direction of rotation, the inhaled air can be pushed outwards towards the outer circumference without stagnating. Since the outer blade 188 has a convex shape towards the rear in the direction of rotation, the air can be strongly pushed outwards. In addition, since the inner blade 186 has a convex shape towards the front in the direction of rotation and the outer blade 188 has a convex shape towards the rear in the direction of rotation, a blower fan with excellent airflow and static pressure can be realized. In addition, since the second direction blade 190 has a convex shape towards the rear in the direction of rotation, the air can be strongly pushed outwards. Furthermore, since the air is strongly pushed outwards, the direction change can be achieved without flow separation due to pressure loss during the direction change to the second direction D2 by the first ring 140 and the second ring 160.

[0044] Furthermore, since the air that flows into the motor 10 through the first vent 212 and the second vent 214 is released through the through hole 220, heat can be efficiently dissipated. Also, since the first vent 212 and the second vent 214 are provided in two rows, a large amount of air can flow uniformly into the motor 10. Furthermore, since a large amount of air flows uniformly into the motor 10, the amount of air circulating within the motor 10 is increased, and heat can be efficiently discharged from the through-hole 220. In addition, because heat is efficiently discharged, the cooling performance of the motor 10 can be improved.

[0045] Furthermore, the air flowing in from the first vent 212 collides with the motor coil 200, recovering heat from the motor coil 200 and being discharged from the through-hole 220. This efficiently recovers heat from the motor coil 200, which is the heat source of the motor 10, and discharges it to the outside of the motor 10. Additionally, the air flowing in from the first vent 212 collides with the motor coil 200 and slows down, but merges with the air flowing in from the second vent 214 and is discharged from the through-hole 220. This efficiently recovers heat from the motor coil 200, which is the heat source of the motor 10, and discharges it to the outside of the motor 10. Moreover, since the opening area of ​​the multiple second vents 214 is larger than the opening area of ​​the multiple first vents 212, the inflow can be made more uniform. Furthermore, because the inflow is made more uniform, the amount of circulation within the motor 10 is increased, and heat can be efficiently discharged from the through-hole 220.

[0046] An overview of one aspect of this disclosure is as follows: (Item 1-1) A cylindrical boss (102), A ring-shaped main plate (120) extends outward from the boss (102) and is oriented in two opposite directions, a first direction (D1) and a second direction (D2), along the central axis of the boss (102), The main plate (120) has an annular plate-shaped first ring (140) surrounding its outer edge, A ring-shaped second ring (160) surrounds the outer edge of the first ring (140), The system comprises a blade (180) extending substantially radially from the main plate (120) to the second ring (160) while being connected to the first ring (140), The first ring (140) is positioned on the side of the main plate (120) in the first direction (D1) and has a first parallel surface (142) which is substantially parallel to the main plate (120), and a first inclined surface (144) which is inclined in the second direction (D2) from the outer peripheral edge of the first parallel surface (142). The second ring (160) is a vane (100) having a second parallel surface (162) which is positioned on the first direction (D1) side of the first parallel surface (142) and is substantially parallel to the main plate (120), and a second inclined surface (164) which is inclined in the second direction (D2) from the outer peripheral edge of the second parallel surface (162).

[0047] (Item 1-2) The blade (180) is the feather (100) described in item 1-1, which is also positioned on the portion of the first ring (140) on the second direction (D2) side and on the portion between the first ring (140) and the second ring (160).

[0048] (Item 1-3) The vane (100) according to item 1-2, wherein the distance in the first direction (D1) between the main plate (120) and the first ring (140) is greater than the distance in the first direction (D1) between the first ring (140) and the second ring (160).

[0049] (Items 1-4) The blade (180) has an inner blade (186) extending from the boss (102) to the outer edge of the main plate (120), and an outer blade (188) extending from the outer edge of the main plate (120) to the second ring (160). The inner blade (186) has a convex shape towards the front in the rotational direction of the wing (100), The outer blade (188) is convex to the rear side in the rotational direction of the blade (100), as described in item 1-1.

[0050] (Items 1-5) In the blade (180), the portion of the first ring (140) on the second direction (D2) side and the portion between the first ring (140) and the second ring (160) are the second direction side blade (190). The second direction blade (190) is the blade (100) described in item 1-2, having a convex shape towards the rear in the rotational direction of the blade (100).

[0051] (Item 2-1) A motor (10) having a motor shaft (12) extending toward a first end (14) and a second end (16) in opposite directions, The pump casing (30) connected to the motor (10) is made to pass through the second end (16) side of the motor shaft (12), An impeller (50) is attached to the second end (16) of the motor shaft (12) within the pump casing (30) and rotates due to the rotation of the motor shaft (12), The system includes a cooling fan (100) attached to the first end (14) of the motor shaft (12) and which rotates in accordance with the rotation of the motor shaft (12), On the opposing surface (210) of the motor (10) facing the cooling fan (100), a plurality of first ventilation holes (212) are arranged in an arc centered on the central axis of the motor shaft (12), and a plurality of second ventilation holes (214) are arranged along the plurality of first ventilation holes (212). A vortex pump (1000) is provided, which has a plurality of first ventilation holes (212), a plurality of second ventilation holes (214), and a through hole (220) that communicates inside the motor (10).

[0052] (Item 2-2) The motor (10) has a motor coil (200), The plurality of first ventilation holes (212) are arranged opposite the motor coil (200), The plurality of second vents (214) are arranged on the outer circumference of the motor coil (200) in the vortex pump (1000) as described in item 2-1.

[0053] (Item 2-3) The vortex pump (1000) according to item 2-2, wherein the opening area of ​​the plurality of second vents (214) is larger than the opening area of ​​the plurality of first vents (212).

[0054] (Item 2-4) The cooling fan (100) is A cylindrical boss (102), A ring-shaped main plate (120) extends outward from the boss (102) and is oriented in two opposite directions, a first direction (D1) and a second direction (D2), along the central axis of the boss (102), The main plate (120) has an annular plate-shaped first ring (140) surrounding its outer edge, A ring-shaped second ring (160) surrounds the outer edge of the first ring (140), The system comprises a blade (180) extending substantially radially from the main plate (120) to the second ring (160) while being connected to the first ring (140), The first ring (140) is positioned on the side of the main plate (120) in the first direction (D1) and has a first parallel surface (142) which is substantially parallel to the main plate (120), and a first inclined surface (144) which is inclined in the second direction (D2) from the outer peripheral edge of the first parallel surface (142). The second ring (160) has a second parallel surface (162) which is positioned on the first direction (D1) side of the first parallel surface (142) and is substantially parallel to the main plate (120), and a second inclined surface (164) which is inclined in the second direction (D2) from the outer peripheral edge of the second parallel surface (162), The first portion between the outer peripheral edge of the main plate (120) and the first inclined surface (144) faces the plurality of first ventilation holes (212), The second portion between the first inclined surface (144) and the second inclined surface (164) is a vortex pump (1000) according to any one of items 2-1 to 2-3, facing the plurality of second vents (214).

[0055] (Item 2-5) The vortex pump (1000) described in item 2-4, wherein the blade (180) is also positioned on the portion of the first ring (140) on the second direction (D2) side and in the portion between the first ring (140) and the second ring (160).

[0056] (Item 2-6) The vortex pump (1000) according to item 2-5, wherein the distance in the first direction (D1) between the main plate (120) and the first ring (140) is greater than the distance in the first direction (D1) between the first ring (140) and the second ring (160).

[0057] (Item 2-7) The blade (180) has an inner blade (186) extending from the boss (102) to the outer edge of the main plate (120), and an outer blade (188) extending from the outer edge of the main plate (120) to the second ring (160). The inner blade (186) has a convex shape towards the front in the rotational direction of the cooling fan (100). The vortex pump (1000) described in item 2-4, wherein the outer blade (188) is convex to the rear side in the rotational direction of the cooling fan (100).

[0058] (Item 2-8) In the blade (180), the portion of the first ring (140) on the second direction (D2) side and the portion between the first ring (140) and the second ring (160) are the second direction side blade (190). The vortex pump (1000) described in item 2-5, wherein the second direction-side blade (190) is convex to the rear side in the rotation direction of the cooling fan (100).

[0059] The present disclosure has been explained above based on examples. These examples are illustrative, and it will be understood by those skilled in the art that various modifications are possible for each component or combination of processing steps, and that such modifications are also within the scope of the present disclosure. [Explanation of Symbols]

[0060] D1 First direction, D2 Second direction, 10 Motor, 12 Motor shaft, 14 First end, 16 Second end, 30 Pump casing, 32 Vortex chamber, 34 Inlet, 36 Outlet, 50 Impeller, 52 Cover, 70 Fan cover, 100 Cooling fan, 102 Boss, 104 Through hole, 120 Main plate, 122 First surface, 124 Second surface, 130 First spacing, 132 Second spacing, 140 First ring, 142 First parallel surface, 144 First inclined surface, 160 Second ring, 162 Second parallel surface, 164 Second inclined surface, 180 Blade, 182 First part, 184 Second part, 186 Inner blade, 188 Outer blade, 190 Second direction blade, 200 Motor coil, 202 Rotor, 210 Opposing surface, 212 First vent, 214 Second vent, 216, 220 Through hole, 300 Suction channel, 302 Gas-liquid separation chamber, 304 Vortex chamber channel, 306 Inlet, 308 Blade, 310 Wall section, 312 Gas-liquid separation chamber inlet, 314 Vortex chamber return port, 320 First side, 322 Second side, 324 Top surface, 326 Bubble, 1000 Vortex pump.

Claims

1. A motor having motor shafts extending toward a first end and a second end in opposite directions, The motor shaft is passed through the second end of the pump casing connected to the motor, An impeller is attached to the second end of the motor shaft within the pump casing and rotates with the rotation of the motor shaft, The motor shaft is equipped with a cooling fan attached to the first end of the motor shaft, which rotates in accordance with the rotation of the motor shaft. In the motor, the surface facing the cooling fan is provided with a plurality of first ventilation holes arranged in an arc around the central axis of the motor shaft, and a plurality of second ventilation holes arranged along the plurality of first ventilation holes. A vortex pump is provided, wherein the motor has a plurality of first ventilation holes, a plurality of second ventilation holes, and through holes that communicate with each other inside the motor.

2. The motor has a motor coil, The plurality of first ventilation holes are arranged opposite the motor coil, The vortex pump according to claim 1, wherein the plurality of second ventilation holes are arranged on the outer circumference side of the motor coil.

3. The vortex pump according to claim 2, wherein the opening area of ​​the plurality of second vents is larger than the opening area of ​​the plurality of first vents.

4. The aforementioned cooling fan A cylindrical boss, A ring-shaped main plate extending outward from the boss and facing in two opposite directions, a first direction and a second direction along the central axis of the boss, A first ring in the shape of an annular plate surrounds the outer edge of the main plate, A second ring in the shape of an annular plate surrounds the outer edge of the first ring, The system comprises a blade extending substantially radially from the main plate to the second ring while being connected to the first ring, The first ring is positioned on the first side of the main plate and has a first parallel surface which is substantially parallel to the main plate, and a first inclined surface which is inclined in the second direction from the outer edge of the first parallel surface. The second ring has a second parallel surface which is positioned on the first direction side of the first parallel surface and is substantially parallel to the main plate, and a second inclined surface which is inclined in the second direction from the outer peripheral edge of the second parallel surface. The first portion between the outer peripheral edge of the main plate and the first inclined surface faces the plurality of first ventilation holes, The vortex pump according to any one of claims 1 to 3, wherein the second portion between the first inclined surface and the second inclined surface faces the plurality of second ventilation holes.

5. The vortex pump according to claim 4, wherein the blades are also arranged in the portion of the first ring on the second direction side and in the portion between the first ring and the second ring.

6. The vortex pump according to claim 5, wherein the distance in the first direction between the main plate and the first ring is greater than the distance in the first direction between the first ring and the second ring.

7. The blade comprises an inner blade extending from the boss to the outer edge of the main plate and an outer blade extending from the outer edge of the main plate to the second ring. The inner blade has a convex shape towards the front in the rotation direction of the cooling fan. The vortex pump according to claim 4, wherein the outer blade has a convex shape towards the rear in the rotation direction of the cooling fan.

8. In the blade, the portion of the first ring on the second direction side and the portion between the first ring and the second ring are the second direction side blade. The vortex pump according to claim 5, wherein the second direction blade is convex to the rearward side in the rotation direction of the cooling fan.

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