JP2018197526A - Electric pump - Google Patents

Abstract

To obtain an electric pump having a changeover part.SOLUTION: An electric pump 10 comprises: a motor part 20 in which a rotor 18 rotates by being operated; an impeller 16 rotated by the rotor 18; a flow-in pipe 60 into which liquid flows; and a first outlet pipe and a second outlet pipe 62 from which the liquid which flows out of the flow-in pipe 60 flows out. The electric pump 10 comprises a changeover part 26 in which the liquid flowing in from the flow-in pipe 60 is pressure-sent by the impeller 16 by the rotation of the rotor 18 to one side, and flows out of the first outlet pipe, a flow of the liquid to the second outlet pipe 62 side from the flow-in pipe 60 is blocked, the liquid flowing in from the flow-in pipe 60 flows out of the second outlet pipe 62 by the rotation of the rotor 18 to the other side, and the flow of the liquid to the first outlet pipe side from the flow-in pipe 60 is blocked.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electric pump.

  Patent Document 1 below discloses a cooling water circuit and an electric water pump that constitute a part of a vehicle air conditioner. In the vehicle air conditioner described in this document, two electric water pumps (electric pumps) are provided. One electric water pump supplies cooling water to a heat source such as an engine and a fuel cell, and the other electric pump supplies cooling water (heating hot water) heated by the heat source to the heater core. And the circuit of the cooling water for heat source cooling and the circuit of the warm water for heating are switched by the switching valve.

JP 2011-98670 A

  By the way, from the viewpoint of facilitating assembly work of an apparatus having an electric water pump such as a vehicle air conditioner and reducing the number of components, an electric water pump and a switching unit such as a switching valve are integrally provided. There are cases where this is desirable.

  In view of the above fact, an object of the present invention is to obtain an electric pump having a switching unit.

  The electric pump according to claim 1 is configured such that a motor unit that is rotated by being operated, a fluid pumping unit that is rotated by the rotor, an inflow unit into which liquid flows in, and a liquid that flows in from the inflow unit. The first outflow part and the second outflow part that flow out and the rotor is rotated to one side, so that the liquid flowing in from the inflow part is pumped by the fluid pumping part and flows out from the first outflow part. In addition, the flow of liquid from the inflow portion to the second outflow portion side is blocked, and the rotor is rotated to the other side, so that the liquid that has flowed in from the inflow portion flows out of the second outflow portion. A switching unit that blocks the flow of liquid from the inflow part to the first outflow part side.

  According to the electric pump of the first aspect, the rotor is rotated by operating the motor unit. Here, when the rotor is rotated to one side, the flow of the liquid from the inflow portion to the second outflow portion side is blocked by the switching portion and the liquid flow from the inflow portion to the first outflow portion side is allowed. Is done. Therefore, the liquid flowing in from the inflow part is pumped by the fluid pumping part rotated by the rotor and flows out from the first outflow part. Further, when the rotor is rotated to the other side, the flow of liquid from the inflow portion to the first outflow portion side is blocked and the flow of liquid from the inflow portion to the second outflow portion side is allowed by the switching portion. The Therefore, the liquid flowing in from the inflow portion flows out from the second outflow portion. Thus, in the present invention according to claim 1, an electric pump having a switching unit can be obtained.

  The electric pump according to claim 2 is the electric pump according to claim 1, wherein the switching portion is a valve provided between the inflow portion, the first outflow portion, and the second outflow portion, The flow path of the liquid between the said inflow part, the said 1st outflow part, and the said 2nd outflow part is switched by moving a valve | bulb with rotation of the said rotor.

  According to the electric pump of the second aspect, the flow path of the liquid between the inflow portion, the first outflow portion, and the second outflow portion can be switched by moving the valve as the rotor rotates.

  The electric pump according to claim 3 is the electric pump according to claim 2, wherein the switching unit moves along an axial direction of the rotating shaft by rotating the rotating shaft together with the rotor. The moving shaft is rotated to the other side, the moving portion is displaced to the other side, and contacts the valve so that the valve is moved from the inflow portion to the first. By moving the liquid flow to the outflow portion side to a position where the liquid flow is cut off, the rotating shaft is rotated to one side, the moving portion is displaced to one side, and the valve is brought into contact with the valve. By moving the liquid flow from the inflow portion to the second outflow portion side to a position where the liquid flow is cut off, and the rotation shaft is further rotated to one side, the movement portion is idled with respect to the rotation shaft.

  According to the electric pump of the third aspect, after the moving part comes into contact with the valve and moves the valve to the position, when the rotating shaft is further rotated to one side, the moving part is moved with respect to the rotating shaft. Idle. Thereby, it can suppress that unnecessary force is added to a valve | bulb from a moving part.

  According to a fourth aspect of the present invention, in the electric pump according to the second or third aspect, the position of the valve is maintained in a state where the motor unit is stopped.

  According to the electric pump of the fourth aspect, the position of the valve can be held even when the motor unit is stopped.

It is a perspective view which shows the electric pump of this embodiment. It is a top view which shows the electric pump of this embodiment. It is sectional drawing which shows the cross section of the electric pump cut | disconnected along the 3-3 line shown by FIG. It is a disassembled perspective view which decomposes | disassembles and shows the switching part of an electric pump. (A) is a side view showing the valve, (B) is a plan view showing the valve, and (C) is a cross section showing a cross section of the valve cut along the line 5C-5C shown in (B). FIG. It is an expanded sectional view which expands and shows the part in which a pair of bearing valve was provided, and has shown the state in which a pair of bearing valve is located in the substantially the same position of an axial direction. It is an expanded sectional view which expands and shows the part in which a pair of bearing valve was provided, and has shown the state which one bearing valve moved to the axial direction with respect to the other bearing valve. It is an expanded sectional view which expands and shows the end part of the worm part in a shaft, and a pair of bearing valves. It is explanatory drawing for demonstrating the cooling water which flows through the intake groove formed in the valve | bulb. It is an expanded sectional view showing a bearing valve etc. in a state before a shaft is rotated in the reverse direction. It is an expanded sectional view showing a bearing valve etc. when a shaft starts to rotate in the reverse direction. It is a sectional side view which shows a switching part, and has shown the state before a shaft is rotated to the other side. It is a sectional side view which shows a switching part, and has shown the state when the shaft begins to rotate to the other side. FIG. 14 is a side cross-sectional view showing the switching unit, and shows a state where the shaft is further rotated than the state shown in FIG. 13 and the other bearing valve starts moving the valve. It is a sectional side view which shows a switching part, and has shown the state in which the shaft was further rotated rather than the state shown by FIG. FIG. 16 is a side cross-sectional view showing the switching unit, showing a state where the shaft is further rotated than the state shown in FIG. 15 and the switching of the flow path by the switching unit is completed. It is a mimetic diagram showing typically the cooling water circuit provided with the electric pump of this embodiment, and shows the state where the impeller of the electric pump of this embodiment is rotating to one side. It is a mimetic diagram showing typically the cooling water circuit provided with the electric pump of this embodiment, and has shown the state where the electric pump of this embodiment has stopped and the other electric pump is operating. It is a schematic diagram which shows typically the cooling water circuit provided with the electric pump of this embodiment, and the electric pump of this embodiment has stopped in the state from which the flow path was switched from the state shown by FIG. The other electric pump is operating.

  The electric pump which concerns on embodiment of this invention is demonstrated using FIGS. In addition, the arrow Z direction, the arrow R direction, and the arrow C direction that are appropriately shown in the drawings indicate one side of the rotor in the rotational axis direction, one side in the rotational radial direction, and one side in the rotational circumferential direction. In addition, hereinafter, when only the axial direction, the radial direction, and the circumferential direction are indicated, the rotational axis direction, the rotational radial direction, and the rotational circumferential direction of the rotor are indicated unless otherwise specified.

  As shown in FIGS. 1 and 2, the electric pump 10 of this embodiment is a water pump for pumping cooling water (liquid) into the interior of a vehicle engine, a heat exchanger, or the like. Specifically, as shown in FIG. 3, the electric pump 10 includes a pump housing 14 that forms an outline of the pump chamber 12 in which the pressure of the introduced cooling water is increased, and a pump chamber 12 by rotating an impeller 16. And a rotor 18 that pumps the cooling water that has flowed into the cylinder. The electric pump 10 includes a stator 20 that rotates the rotor 18 by generating a rotating magnetic field, and a motor housing 22 that supports the stator 20 and the like. Furthermore, the electric pump 10 includes a circuit device 24 for controlling energization to the stator 20. The electric pump 10 includes a casing valve 28 that is attached to the pump housing 14 and includes a switching unit 26 that switches the flow path.

  The pump housing 14 is formed in a connection pipe 30 to which the casing valve 28 is connected and a first outlet pipe 32 (see FIG. 1) as a first outflow portion from which cooling water flows out, and a substantially cochlear shape (substantially spiral). And a pump chamber forming portion 34 that forms an outline of the pump chamber 12 in which an impeller 16 described later is disposed. The connection pipe 30 extends from the axial center of the pump chamber forming portion 34 to one side in the axial direction, and the first outlet pipe 32 extends from the outer peripheral portion of the pump chamber forming portion 34 as shown in FIG. It extends radially outward. As shown in FIG. 3, the pump housing 14 is fixed to the motor housing 22 by joining the outer peripheral portion of the pump housing 14 described above to a motor housing 22 described later.

  The motor housing 22 is an integrally molded product in which a rotor housing recess 36 in which the rotor 18 is disposed on one side in the axial direction is formed and a stator housing recess 38 in which the stator 20 is disposed on the other side in the axial direction. . A support shaft portion 40 that projects toward one side in the axial direction is provided upright on the shaft center portion of the bottom of the rotor housing recess 36. A rotor 18 described later is rotatably supported on the support shaft portion 40. The stator housing recess 38 is an annular space formed on the radially outer side of the rotor housing recess 36, and the stator 20 and the rotor 18 have a diameter by disposing the stator 20 in the stator housing recess 38. It is arranged facing the direction.

  The rotor 18 constituting a part of the motor unit is configured integrally with the impeller 16 so that the rotor 18 can rotate integrally with the impeller 16. The rotor 18 includes a rotor magnet support portion 42 formed in a thick cylindrical shape, and a rotor magnet 44 is fixed to the rotor magnet support portion 42. In addition, a rotor bearing 46 whose inner diameter is set to an inner diameter corresponding to the outer diameter of the shaft support portion 40 is fixed to the inner peripheral portion of the rotor magnet support portion 42. By inserting the rotor bearing 46 into the support shaft portion 40, the rotor 18 can rotate around the support shaft portion 40 integrally with the rotor bearing 46.

  The stator 20 that constitutes another part of the motor unit is configured with a stator core 48 formed in an annular shape and a conductive winding 50 as main elements. The stator core 48 is formed with a plurality of teeth 48 </ b> A that extend radially outward and around which the winding 50 is wound. And the coil 50A is formed along the said teeth part 48A by winding the coil | winding 50 around each teeth part 48A. Further, the terminal portion of the winding 50 forming the coil 50A is connected to a circuit board 54 described later. The stator 20 is attached to the stator holder.

  The circuit device 24 includes a circuit board 54 formed in a disk shape extending in the radial direction and a plurality of circuit elements 56 attached to the circuit board 54 as main elements. The circuit board 54 is fixed to the circuit board support member 52. The circuit device 24 is covered with a cover member 57 attached to the motor housing 22.

  Next, the structure of the casing valve 28 and the switching part 26 of the principal part of this embodiment is demonstrated.

  As shown in FIGS. 3 and 4, the casing valve 28 is formed in a substantially T shape (substantially cross shape) having a flow path through which cooling water flows. Specifically, the casing valve 28 is formed in a cylindrical shape, and an end portion on the other side in the axial direction is connected to the connecting pipe 30 of the pump housing 14. An inflow pipe 60 serving as an inflow part and a second outlet pipe 62 serving as a second outflow part connected to the side connected to the connection pipe 30 are provided. A shaft 68 (described later) is supported on the end portion on the one axial side of the central cylindrical portion 58. Further, the inflow pipe 60 and the second outlet pipe 62 are orthogonal to the central cylindrical portion 58, and the inflow pipe 60 and the second outlet pipe 62 are arranged coaxially (on the same straight line). . The central cylindrical portion 58 may be integrally formed (integrated molding) with the pump housing 14.

  The switching unit 26 is operated to selectively switch whether the cooling water flowing in from the inflow pipe 60 of the casing valve 28 flows to the pump housing 14 side or to the second outlet pipe 62 side. Specifically, the switching unit 26 includes a seal valve 64 fixed to the casing valve 28, a valve 66 disposed in the seal valve 64, a shaft 68 as a rotating shaft that rotates together with the rotor 18, And a pair of bearing valves 70 and 72 which are engaged with the shaft 68.

  The seal valve 64 is disposed in the central cylindrical portion 58 of the casing valve 28 and is formed in a cylindrical shape with a part cut away. A communication hole 64 </ b> A communicating with the second outlet pipe 62 is formed in a portion of the seal valve 64 corresponding to the second outlet pipe 62 of the casing valve 28. Note that a portion of the seal valve 64 corresponding to the inflow pipe 60 of the casing valve 28 is cut away. The inner peripheral portion of the seal valve 64 is a valve support portion 64B that supports the valve 66 so as to be slidable in the axial direction. The seal valve 64 is formed with a guide groove 64 </ b> C that regulates displacement (rotational displacement) of the valve 66 in the circumferential direction with respect to the seal valve 64 by engaging a part of the valve 66 described later. . An annular stopper valve 74 is attached to the other axial side of the seal valve 64. The valve 66 disposed in the valve support portion 64B of the seal valve 64 abuts against the stopper valve 74, so that the movement of the valve 66 relative to the seal valve 64 to the other side in the axial direction is restricted. .

  As shown in FIGS. 3 to 5, the valve 66 is formed in a cylindrical shape into which cooling water flows. A portion on one side in the axial direction of the valve 66 is a bearing valve arrangement portion 66A in which a pair of bearing valves 70 and 72 described later are arranged. Although details will be described later, one bearing valve 70 is held in a portion on one side in the axial direction in the bearing valve arrangement portion 66A, and the other bearing valve 72 is arranged in the axial direction in the bearing valve arrangement portion 66A. It is possible to move to. Further, a shaft insertion hole 66B into which a shaft 68 described later is inserted is formed at the end on one axial side of the bearing valve arrangement portion 66A. In addition, an intake groove 66C for taking in the cooling water existing on one side in the axial direction of the valve 66 into the bearing valve arrangement portion 66A is formed in the peripheral portion of the shaft insertion hole 66B. Further, a portion of the valve 66 on the other side in the axial direction from the bearing valve arrangement portion 66A is a valve main body portion 66D. An engagement protrusion 66E that engages with the guide groove 64C of the seal valve 64 is formed along the axial direction on the outer peripheral portion of the valve body 66D.

  A communication hole 66 </ b> F communicating with the inflow pipe 60 is formed in a portion of the valve main body 66 </ b> D corresponding to the inflow pipe 60 of the casing valve 28. Then, in a state where the communication hole 66F and the inflow pipe 60 are communicated, the cooling water flowing in from the inflow pipe 60 flows into the pump chamber 12 of the pump housing 14 through the central tubular portion 58 of the valve 66 and the casing valve 28. . Further, in a state where the communication hole 66 </ b> F and the inflow pipe 60 are in communication, the communication hole 64 </ b> A formed in the seal valve 64 is closed by a part of the valve main body portion 66 </ b> D of the valve 66. Therefore, the flow of the cooling water flowing from the inflow pipe 60 to the second outlet pipe 62 is blocked. On the other hand, when the valve body 66D is moved to the other side in the axial direction and the communication hole 66F and the inflow pipe 60 are not communicated with each other, the coolant flowing in from the inflow pipe 60 toward the second outlet pipe 62 side. The flow is allowed and the flow into the pump chamber 12 side of the pump housing 14 through the central tubular portion 58 of the cooling water valve 66 and the casing valve 28 that flows in from the inflow pipe 60 is blocked.

  As shown in FIGS. 3 and 4, the shaft 68 is formed in a rod shape that is disposed coaxially with the rotor 18. The other end 68 </ b> A in the axial direction of the shaft 68 is fixed to the rotor 18 via a rotor bearing 46 provided at the axial center of the rotor 18. Thereby, the shaft 68 rotates integrally with the rotor 18. An end 68B on one axial side of the shaft 68 includes a bearing shaft 68 fixed to an end on one axial side of the central tubular portion 58 of the casing valve 28 and a cap shaft 78 supported by the bearing shaft 68. It is rotatably supported through The cap shaft 78 is fixed to the end 68B on one axial side of the shaft 68 by press fitting or the like.

  A right-handed worm portion 68C is formed along the axial direction at a portion on one axial side of the shaft 68. When the shaft 68 is rotated in a state where a pair of bearing valves 70 and 72 described later are engaged with the worm portion 68C, the valve 66 can be moved in the axial direction together with the bearing valves 70 and 72. Yes. In addition, the one side in the axial direction of the worm portion 68C is an unstable worm portion 68E having a portion that engages with the pair of bearing valves 70 and 72 toward the other side in the axial direction. The portion where the portion that engages with the pair of bearing valves 70 and 72 is eliminated is a straight portion 68D having a smaller diameter than the outer diameter of the worm portion 68C.

  The pair of bearing valves 70 and 72 as the moving portions are formed in a block shape in which engaging portions 70A and 72A that engage with the worm portion 68C of the shaft 68 are formed in the radially inner portion. In the present embodiment, one bearing valve 70 and the other bearing valve 72 are arranged at substantially equal intervals in the circumferential direction (arranged at intervals of about 180 ° in the circumferential direction). In the present embodiment, the pair of bearing valves 70 and 72 are provided, but a configuration in which three or more bearing valves are provided may be employed.

  As shown in FIG. 6, one bearing valve 70 is engaged with a bearing valve engagement recess 66 </ b> G formed in a portion on one axial side in the bearing valve arrangement portion 66 </ b> A of the valve 66. Thereby, the movement of one bearing valve 70 in the axial direction relative to the valve 66 is restricted. As shown in FIGS. 6 and 7, the other bearing valve 72 is engaged with a bearing valve engaging recess 66H formed in the bearing valve disposition portion 66A. The dimension in the axial direction of the bearing valve engaging recess 66H is set to be larger than the dimension in the axial direction of the other bearing valve 72. Accordingly, the other bearing valve 72 is movable in the axial direction between the end portion 66H1 on the one axial side of the bearing valve engaging recess 66H and the end portion 66H2 on the other axial side. That is, movement of the other bearing valve 72 in the axial direction relative to the valve 66 is allowed within a predetermined range. Here, in the case where the pair of bearing valves 70 and 72 are arranged at an interval of about 180 ° in the circumferential direction, the distance between the axial center 70A of the bearing valve 70 and the axial center 72A of the bearing valve 72 is ( By setting the dimension to satisfy the pitch of the worm portion 68C) × (positive number N + 1/2), the other bearing valve 72 and the worm portion 68C can be smoothly engaged.

  In this embodiment, the valve 66 is allowed to flow into the pump chamber 12 of the pump housing 14 through the valve 66 of the cooling water flowing in from the inflow pipe 60 and the central tubular portion 58 of the casing valve 28. In a state where the flow of the cooling water flowing in from the inflow pipe 60 to the second outlet pipe 62 is blocked (the state shown in FIG. 6), the shaft 68 and the rotor 18 are on one side (arrow C). 8, the pair of bearing valves 70, 72 are disposed in a portion facing the straight portion 68 </ b> D of the shaft 68, and the pair of bearing valves 70, 72 are connected to the shaft 68, as shown in FIG. 8. It is supposed to idle. In the present embodiment, the part of the straight portion 68D and the worm portion 68C that engages with the pair of bearing valves 70, 72 is lower than the dimension of the pair of bearing valves 70, 72 in the axial direction. Since the dimension H in the axial direction combined with the portion 68E is set to be large, the pair of bearing valves 70 and 72 are smoothly idled with respect to the shaft 68.

  As shown in FIG. 9, in the present embodiment, the cooling water existing on one side in the axial direction of the valve 66 is taken into the bearing valve arrangement portion 66A via the intake groove 66C. Thus, in the state shown in FIG. 6, when the shaft 68 is rotated together with the rotor 18 to the other side (opposite to the direction of the arrow C), the shaft 68 is disposed at a portion facing the straight portion 68 </ b> D. The other bearing valve 72 is easily engaged with the worm portion 68 </ b> C of the shaft 68. In the present embodiment, the cooling water flows into one axial direction side of the valve 66 by providing an appropriate gap between the components around the valve 66, but this gap is preferably as small as possible. .

  Furthermore, as shown in FIG. 10, in the present embodiment, the surface 72B on the other circumferential side of the other bearing valve 72 is inclined with respect to the axial direction. More specifically, the surface 72B on the other circumferential side of the other bearing valve 72 is inclined toward one side in the circumferential direction (inclined at an angle θ) as viewed from the radially outer side toward the other side in the axial direction. Therefore, as shown in FIG. 11, when the shaft 68 is rotated to the other side (the direction opposite to the arrow C), the other bearing valve 72 is tilted. As a result, when the shaft 68 is rotated together with the rotor 18 to the other side (opposite to the direction of the arrow C), the other bearing valve 72 disposed at a portion facing the straight portion 68D of the shaft 68 is It is easy to engage with the worm portion 68C. One bearing valve 70 is configured similarly to the other bearing valve 72.

  In addition, in the components constituting the switching unit 26 described above, it is desirable that the components assumed to slide with other components are formed using a self-lubricating material (for example, an underwater bearing material). In addition, it is desirable that the surface that is assumed to slide in each component is a flat surface.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  As shown in FIGS. 1 to 3, in the electric pump 10 of the present embodiment described above, the cooling water flowing in from the inflow pipe 60 is pumped in the pump chamber 12 as the rotor 18 rotates to one side. It flows out from the first outlet pipe 32.

  Further, when the rotor 18 is rotated to the other side, the flow path in the electric pump 10 is switched. Thereby, the cooling water flowing in from the inflow pipe 60 can flow out from the second outlet pipe 62.

  Specifically, in the state shown in FIG. 3, the valve 66 enters the pump chamber 12 of the pump housing 14 through the central tubular portion 58 of the cooling water valve 66 and the casing valve 28 flowing in from the inflow pipe 60. It is located at a position where the flow is allowed and the flow of the cooling water flowing in from the inflow pipe 60 to the second outlet pipe 62 is blocked. In this state, since the pair of bearing valves 70 and 72 are disposed at a portion (and the same position in the axial direction) facing the straight portion 68D of the shaft 68, the shaft 68 together with the rotor 18 is on one side (arrow C direction side). ), The pair of bearing valves 70, 72 idle with respect to the shaft 68. Therefore, the rotor 18 is rotated together with the impeller 16 while the valve 66 remains in the position shown in FIG. Thereby, the cooling water flowing in from the inflow pipe 60 is pumped in the pump chamber 12 and flows out from the first outlet pipe 32.

  As shown in FIG. 12, when the shaft 68 is rotated together with the rotor 18 (see FIG. 3) to the other side (opposite the direction of the arrow C), as shown in FIG. The other bearing valve 72 disposed at a portion facing the portion 68D engages with the worm portion 68C of the shaft 68. When the shaft 68 is further rotated together with the rotor 18 to the other side, the other bearing valve 72 is moved along the worm portion 68C of the shaft 68 to the other side in the axial direction. And as FIG. 14 shows, the other bearing valve 72 contact | abuts to the edge part 66H2 of the axial direction other side of the bearing valve engagement recessed part 66H. Further, the other bearing valve 72 presses the end 66H2 on the other axial side of the bearing valve engaging recess 66H toward the other axial side while being moved to the other axial side. Thereby, as shown in FIG. 15, the valve 66 moves toward the other side in the axial direction. When the valve 66 moves toward the other side in the axial direction, one bearing valve 70 engages with the worm portion 68C and moves along with the valve 66 toward the other side in the axial direction. Also, as shown in FIG. 16, when the valve 66 is moved to a position where the valve 66 does not communicate with the communication hole 66F and the inflow pipe 60, the rotation of the rotor 18 is stopped. The rotor 18 is stopped by the circuit device 24 after the valve 66 hits the stopper valve 74. In the state where the rotation of the rotor 18 is stopped, the position of the valve 66 in the axial direction is maintained, and the flow of the cooling water flowing in from the inflow pipe 60 to the second outlet pipe 62 is allowed. The flow into the pump chamber 12 of the pump housing 14 through the valve 66 of the cooling water flowing in from the pipe 60 and the central tubular portion 58 of the casing valve 28 is blocked. As a result, the cooling water flowing in from the inflow pipe 60 can flow out from the second outlet pipe 62.

  Note that the valve 66 can be moved from the position shown in FIG. 16 to the position shown in FIG. 12 by rotating the shaft 68 together with the rotor 18 (see FIG. 3) to one side (arrow C direction). it can.

(Usage example of the electric pump 10 of this embodiment)
Next, the usage example of the electric pump 10 of this embodiment is demonstrated using FIGS. 17 to 19, portions corresponding to the respective portions of the electric pump 10 described above are denoted by the same reference numerals as the respective portions of the electric pump 10.

  As shown in FIG. 17, in the cooling water circuit 80 in which the electric pump 10 of the present embodiment is used, two electric pumps of the electric pump 10 and the main pump 82 of the present embodiment are used. The main pump 82 is used to send cooling water to the device 1 or both the device 1 and the device 2 by operating. The electric pump 10 of this embodiment is used to send cooling water to the device 2 by operating.

  Specifically, when the impeller 16 is rotated together with the rotor 18 to one side (arrow C direction side) while the valve 66 of the electric pump 10 is positioned at the position shown in FIG. The cooling water flowing in from (the cooling water flowing out from the device 2) is pumped in the pump chamber 12 and flows out from the first outlet pipe 32. Then, the cooling water flowing out from the first outlet pipe 32 flows into the device 2 again.

  Further, when the electric pump 10 is stopped and the main pump 82 is activated in a state where the valve 66 of the electric pump 10 is located at the position shown in FIG. The cooled cooling water is pumped by the main pump 82 and flows into the device 1 again.

  Further, when the electric pump 10 is stopped and the main pump 82 is operated in a state where the valve 66 of the electric pump 10 is located in FIG. 16, the electric pump 10 flows out of the device 1 and the device 2 as shown in FIG. 19. The cooling water is pumped by the main pump 82 and flows into the device 1 and the device 2 again. Thus, in this embodiment, the flow of the cooling water shown in FIGS. 17 to 19 can be realized without providing a separate valve from the electric pump 10.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be implemented without departing from the spirit of the present invention. Of course.

DESCRIPTION OF SYMBOLS 10 ... Electric pump, 16 ... Impeller, 18 ... Rotor (motor part), 20 ... Stator (motor part), 26 ... Switching part, 32 ... 1st outlet pipe (1st outflow part), 60 ... Inflow pipe (inflow part) ), 62 ... 2nd outlet pipe (second outflow part), 66 ... Valve, 68 ... Shaft (rotating shaft), 70 ... Bearing valve (moving part), 72 ... Bearing valve (moving part)

Claims (4)

A motor unit that is rotated to rotate the rotor;
A fluid pumping section rotated by the rotor;
An inflow part into which liquid flows,
A first outflow part and a second outflow part from which the liquid flowing in from the inflow part flows out;
By rotating the rotor to one side, the liquid flowing in from the inflow portion is pumped by the fluid pumping portion and flows out from the first outflow portion, and from the inflow portion to the second outflow portion side. The flow of the liquid is interrupted, and the rotor is rotated to the other side, so that the liquid flowing in from the inflow portion flows out from the second outflow portion and also flows from the inflow portion to the first outflow portion side. A switching unit that interrupts the flow of
Electric pump equipped with. The switching portion is a valve provided between the inflow portion and the first outflow portion and the second outflow portion,
The electric pump according to claim 1, wherein the flow path of the liquid between the inflow portion, the first outflow portion, and the second outflow portion is switched by moving the valve with the rotation of the rotor. The switching unit includes a rotating shaft that rotates together with the rotor, and a moving unit that moves along the axial direction of the rotating shaft by rotating the rotor.
When the rotating shaft is rotated to the other side, the moving part is displaced to the other side and comes into contact with the valve, thereby allowing the liquid to flow from the inflow part to the first outflow part side. Move it to the blocking position,
When the rotating shaft is rotated to one side, the moving part is displaced to one side and comes into contact with the valve so that the valve flows the liquid from the inflow part to the second outflow part side. The electric pump according to claim 2, wherein the moving part is idled with respect to the rotating shaft by moving the rotating shaft to one side and further rotating the rotating shaft to one side.   The electric pump according to claim 2 or 3, wherein the position of the valve is maintained in a state where the motor unit is stopped.