Pump assembly with a terminal box having a metallic contact collecting condensation with a drain channel

Patent metadata

Field	Value
Publication number	US-10116183-B2
Application number	US-201314377339-A
Country	US
Kind code	B2
Filing date	Feb 7, 2013
Priority date	Feb 8, 2012
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A pump assembly includes an electric drive motor with a terminal box ( 6 ) arranged on the electric motor ( 4 ). At least one metallic component ( 34 ) extends from the electric drive motor ( 4 ) into an inside of the terminal box ( 6 ). A capture device ( 38, 40 ), for capturing condensation water collecting on the metallic component ( 34 ), is arranged in a proximity of the metallic component ( 34 ) in the inside the terminal box ( 6 ).

First claim

The invention claimed is:

1. A pump assembly comprising:
an electric drive motor;
a terminal box arranged on the electric drive motor, the terminal box comprising electric and electronic components for controlling the electric drive motor, wherein the electric drive motor is a wet-running electric motor;
at least one metallic component extending from the electric drive motor into an inside of the terminal box;
at least one of a stator housing and a can of the electrical drive motor, wherein the metallic element is connected to the stator housing or to the can of the electrical drive motor, the at least one metallic component being electrically conductively connected to at least the stator housing; and
a capture device for capturing condensation water collecting on the metallic component, the capture device being arranged in a proximity of the metallic component, in the inside of the terminal box, the capture device being arranged below the at least one metallic component, the capture device comprising a collection space, the collection space being open to the top, wherein moisture from the at least one metallic component drops in a downward direction through the opening into the collection space, wherein the moisture is collected in the collection space.

2. A pump assembly according to claim 1 , wherein the metallic element is an electrical contact and in particular an earth contact, the capture device comprising a first wall and a second wall arranged in the terminal box interior space, the first wall extending in a first direction and the second wall extending in a second direction that intersects the first direction, the terminal box comprising an opening, the opening being located adjacent to the first wall and the second wall.

3. A pump assembly according to claim 1 , further comprising a stator housing of the electric drive motor, wherein the terminal box comprises at least one opening, with an outer side in contact with an air channel, said air channel being led along an outer side of the stator housing of the electric drive motor, said capture device comprising two walls arranged in a v-shape in the inside of said terminal box, said two walls extending toward each other, said at least one opening being located adjacent to said two walls.

4. A pump assembly according to claim 1 , wherein the pump assembly comprises a circulation pump assembly.

5. A pump assembly according to claim 1 , wherein a space is provided between the metallic component and collection space.

6. A pump assembly according to claim 5 , wherein the collection space is provided with at least one run-off opening which is open to an outer side of the terminal box and which is arranged in a manner such that condensation water captured by the capture device can run off to the outside through this run-off opening, out of the inside of the terminal box.

7. A pump assembly according to claim 6 , wherein the run-off opening is formed in a wall which is adjacent the metallic component.

8. A pump assembly according to claim 6 , wherein the collection space comprises at least two side surfaces which taper obliquely to one another and which, in a region of a smallest distance to one another are adjacent the run-off opening.

9. A pump assembly according to claim 6 , wherein the terminal box, arranged on the electric drive motor, is completely closed to the outside, with the exception of the run-off opening.

10. A pump assembly according to claim 6 , wherein the run-off opening is formed in a wall of the terminal box and is covered on the outer side of the wall by an outer wall distanced to the outer side of the wall.

11. A pump assembly according to claim 6 , wherein the metallic component extends through an opening in a base of the terminal box, into the terminal box.

12. A pump assembly according to claim 11 , further comprising a stator housing of the electric drive motor, wherein a seal is arranged on the opening, said seal closing the opening to the outside in a sealed manner and coming to sealingly bear on a wall of the stator housing of the electric drive motor.

13. A pump assembly according to claim 11 , wherein the run-off opening is formed in a peripheral wall extending transversely to the base.

14. A pump assembly according to claim 13 , wherein the run-off opening is situated in a region of the peripheral wall which lies closest to the metallic component.

15. A pump assembly comprising:
an electric drive motor comprising a stator housing, said stator housing comprising an axial end side;
a terminal box connected to said electric drive motor, said terminal box comprising a terminal box interior space and electric and electronic components for controlling said electric drive motor;
a metallic component extending from at least said axial end side of said stator housing to said terminal box interior space, wherein at least a portion of said metallic component is located in said terminal box interior space, said metallic component being electrically conductively connected to at least said stator housing;
a drip collection arrangement for receiving condensation water collecting on said metallic component, said drip collection arrangement being arranged in said terminal box interior space in an area located below said metallic component, said drip collection arrangement being formed separate from said metallic component, said drip collection arrangement being located at a spaced location from said at least said portion of said metallic component, said drip collection arrangement comprising a drip collection arrangement structure, said drip collection arrangement structure comprising a drip collection area and an opening facing in a direction of said at least said portion of said metallic component, said drip collection area receiving fluid from said at least said portion of said metallic component, wherein a fluid flow path is defined between said at least said portion of said metallic component and said drip collection area, said fluid flow path extending in a downward direction from said at least said portion of said metallic component through said opening to said drip collection area, wherein said fluid delivered via said fluid flow path is collected in said drip collection area;
a fluid guide channel connected to said drip collection arrangement, said fluid guide channel being in fluid communication with said terminal interior space and an environment located outside of said terminal box, wherein fluid in said terminal box interior space exits said terminal box interior space via a terminal box opening in said terminal box and said drip collection arrangement and said fluid guide channel, wherein said fluid guide channel is in fluid communication with a drain opening, wherein the fluid in said guide channel exits into an environment external to said terminal box and said stator housing via said drain opening, said drain opening being located downstream of said first opening with respect to a flow of the fluid.

16. A pump assembly in accordance with claim 15 , wherein said terminal box comprises an outer wall and said electric drive motor comprises a stator housing, said stator housing comprising an outer peripheral stator housing surface, said outer peripheral stator housing surface and said outer wall defining at least a portion of said fluid guide channel, said drip collection arrangement structure comprising two walls arranged in a v-shape in said terminal box interior space, said two walls extending to one another, said terminal box opening being located adjacent to said two walls, said fluid guide channel being in fluid communica

Assignees

• Grundfos Holding As

Inventors

• Jacobsen John B

Classifications

• H02K7/14

  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 title

• H02K2205/09

  Machines characterised by drain passages or by venting, breathing or pressure compensating means · CPC title

• H02K11/00

  Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection (casings, enclosures or supports H02K5/00) · CPC title

• H02K5/225

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• H02K5/10 Primary

  with arrangements for protection from ingress, e.g. water or fingers · CPC title