Canned pump and cooling device equipped therewith

Abstract

To provide a canned pump which can be formed in a lower back shape to sufficiently cool a coil by devising the shape of each of a coil cover and a bobbin case while reducing the size with high reliability, and to provide a cooling device including the same.SOLUTION: The canned pump includes a rotor unit 10 and a stator unit 50 detachable in an axis L direction, and axial-direction positioning means. A coil cover 80 covers at least part of one lateral face of a coil 63, and the axial-direction positioning means has a bobbin case 62 of which one lateral face has body case abutment parts 62a1a, 62a2a abutting directly on a body case 30 in the axis L direction. The body case abutment parts 62a1a, 62a2a are provided on the same plane with or on one side of one lateral face of the coil cover 80 adjacent to the body case abutment parts 62a1a, 62a2a in view from a direction perpendicular to the axis L.SELECTED DRAWING: Figure 1

Claims

1. A rotor unit having a rotor magnet attached to an impeller member, a rotor that rotates around an axis, and a main body case that houses the rotor, A stator unit comprising a stator on which a coil is wound via a bobbin case, and a coil cover detachably disposed on one side of the coil to protect the coil, In the rotor unit and stator unit which are detachable in the axial direction, the rotor magnet is positioned radially inward of the stator, and the rotor unit and stator unit are positioned axially by means of axial positioning means, Equipped with, The coil cover covers at least a portion of one side of the coil, The axial positioning means has a body case contact portion on one side of the bobbin case that directly contacts the body case in the axial direction, The canned pump is characterized in that the main body case contact portion is provided on the same plane or on one side of the coil cover adjacent to the main body case contact portion when viewed from a direction perpendicular to the axis.

2. The aforementioned bobbin case is The first wall portion forms a main body insertion hole into which the main body case is inserted, The coil is surrounded by a second wall portion from the outer periphery, It has a body portion that connects the first wall portion and the second wall portion and around which the coil is wound, The canned pump according to claim 1, characterized in that the main body case contact portion is composed of the first wall portion.

3. The aforementioned bobbin case is The first wall portion forms a main body insertion hole into which the main body case is inserted, The coil is surrounded by a second wall portion from the outer periphery, It has a body portion that connects the first wall portion and the second wall portion and around which the coil is wound, The canned pump according to claim 1, characterized in that the main body case contact portion is composed of the second wall portion.

4. The aforementioned bobbin case is The first wall portion forms a main body insertion hole into which the main body case is inserted, The coil is surrounded by a second wall portion from the outer periphery, It has a body portion that connects the first wall portion and the second wall portion and around which the coil is wound, The canned pump according to claim 1, characterized in that the main body case contact portion is composed of the first wall portion and the second wall portion.

5. The coil cover comprises a covering portion that covers at least a part of one side of the coil, A mounting portion provided on the radially outer side of the covering portion and mounted on the stator, It has a plurality of connecting parts that connect the covering part and the mounting part described above, The canned pump according to any one of claims 1, 3, or 4, characterized in that the main body case contact portion is inserted into at least an outer peripheral opening of the covering portion defined by the covering portion and a pair of adjacent connecting portions.

6. The connecting portion extends from the outer peripheral edge of the covering portion to the other side, The canned pump according to claim 5, characterized in that the mounting portion extends radially outward from the other end of the connecting portion.

7. The coil cover comprises a covering portion that covers at least a part of one side of the coil, A mounting portion provided on the radially outer side of the covering portion and mounted on the stator, It has a plurality of connecting parts that connect the covering part and the mounting part described above, The main body case contact portion of the second wall is provided discontinuously along the circumferential direction via slits, The slit is formed radially inward from the slit, at a position where the body portion is not located. The canned pump according to claim 3 or 4, characterized in that the connecting portion is inserted into the slit.

8. The stator unit further comprises a coil case positioned on the other side of the coil and protecting the coil, A body insertion hole is formed on the other side of the coil case. The canned pump according to claim 1, characterized in that when the other end of the main body case is inserted into the main body insertion hole, the other end of the main body case does not protrude outward from the other side of the coil case.

9. The stator unit further comprises a circuit board for controlling the drive signal to the coil, and a coil case positioned on the other side of the coil to protect the coil. One side of the substrate is in contact with the stator, and a connector for power supply terminals to the substrate is connected to the other side of the substrate. A connector insertion hole is formed on the other side of the coil case. The canned pump according to claim 1, characterized in that when the connector is inserted into the connector insertion hole, the other end of the connector does not protrude outward from the other side of the coil case.

10. A cooling device comprising the canned pump described in claim 1.

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