Circulation pump

• US 7,887,307 B2
• Filed: 12/01/2008
• Issued: 02/15/2011
• Est. Priority Date: 06/02/2006
• Status: Active Grant

• Current Assignee: ITT Manufacturing Enterprises, Inc. (ITT, Inc.)
• Original Assignee: ITT Manufacturing Enterprises, Inc. (ITT, Inc.)
• Inventors: Laing, Karsten
• Primary Examiner(s): BERTHEAUD, PETER JOHN
• Application Number:
  US12/315,370
• Publication Number:
  US 20090148315A1
• Time in Patent Office: 806 Days
• Field of Search: 417/366, 417/423.8, 417/423.14, 417/423.7, 417/371
• US Class Current: 417/423.8
• CPC Class Codes: H02K 11/25 Devices for sensing temperature, or actuated thereby
• CPC Class Codes: H02K 11/30 Structural association with control circuits or drive circuits
• CPC Class Codes: H02K 5/1282 the partition wall in the air-gap being non cylindrical
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132
• CPC Class Codes: H02K 7/14 Structural association with mechanical loads, e.g. with hand-held machine tools or fans with fan or impeller for cooling the machine H02K9/06
• CPC Class Codes: H02K 9/227 Heat sinks

Abstract

A circulation pump is provided. The circulation pump has an electric motor with a stator, a rotor and a motor circuit. The electric motor is disposed in a housing which has a first chamber, in which the stator and the rotor are disposed, and a second chamber, which is separate from the first chamber and in which at least one carrier is positioned, on which at least part of the motor circuit is disposed. The first chamber and the second chamber are connected by at least one connection opening, by means of which at least one electrical element of the motor circuit, which is disposed on the at least one carrier, is in thermal contact with the stator in the first chamber. By providing a housing with separate chambers, the stator in the first chamber may be liquid cooled and the second chamber containing the carrier may be air-cooled.

Claims

1. Circulation pump, comprising:

an electric motor with a stator, a rotor and a motor circuit; and

a housing, in which the electric motor is disposed;

wherein;

the housing has a first chamber, in which the stator and the rotor are disposed, and a second chamber, which is separate from the first chamber and in which at least one carrier is positioned, on which at least part of the motor circuit is disposed;

the first chamber and the second chamber are connected by at least one connection opening, by means of which at least one electrical element of the motor circuit, which is disposed on the at least one carrier, is in thermal contact with the stator in the first chamber;

the stator in the first chamber is adapted to be cooled by means of conveyed liquid;

the second chamber is adapted to be air-cooled;

the at least one carrier has a low-temperature region and a high-temperature region, wherein the low-temperature region is air-cooled and the high-temperature region is cooled by means of the conveyed liquid;

an interspace is disposed between the first chamber and the second chamber;

said interspace comprising an air gap; and

wherein the low temperature region of the least one carrier is directly adjacent the air gap.

2. Circulation pump according to claim 1, wherein electrical elements of the low-temperature region are disposed on a side of the at least one carrier that is remote from the first chamber.

3. Circulation pump according to claim 1, wherein electrical elements of the high-temperature region are disposed on a side of the at least one carrier that faces the first chamber.

4. Circulation pump according to claim 1, wherein the interspace is open towards an exterior of the housing.

5. Circulation pump according to claim 1, wherein the at least one connection opening is closed relative to the interspace.

6. Circulation pump according to claim 1, wherein the low-temperature region of the at least one carrier lies below the air gap.

7. Circulation pump according to claim 1, wherein the second chamber lies below the first chamber.

8. Circulation pump according to claim 1, wherein in a direction of the second chamber the first chamber has an end wall.

9. Circulation pump according to claim 8, wherein in a direction of the first chamber the second chamber has an end wall, which is spaced apart from the end wall of the first chamber.

10. Circulation pump according to claim 8, wherein the end wall of the first chamber at an inner side has a recess for receiving a contact printed circuit board of the stator.

11. Circulation pump according to claim 1, wherein the housing is of a one-piece construction.

12. Circulation pump according to claim 1, wherein in the first chamber positioning elements for the stator are disposed.

13. Circulation pump according to claim 1, wherein an interface between the stator and the rotor is of a spherical design facing the rotor.

14. Circulation pump according to claim 1, wherein the rotor has a spherical surface facing the stator.

15. Circulation pump according to claim 1, wherein the rotor by means of one or more permanent magnets is a magnetic field-generating rotor.

16. Circulation pump according to claim 1, wherein the rotor is spherically mounted.

17. Circulation pump according to claim 1, wherein electronic power circuit elements, which are disposed on the at least one carrier, project through the at least one opening from the second chamber into the first chamber.