US 9,543,803 B2Granted

Heat circulation pump

AssigneeGrundfos Management A/S

InventorsFinn Mathiesen Høj, Thomas Blad

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Abstract

A heat circulation pump includes a pump housing (1) with a pump impeller driven by an electric motor. The electric motor is arranged in a motor housing (8) connected to the pump housing (1). A plastic terminal box (12) is fixed to the motor housing (8) and houses electric and/or electronic components of the engine control and electrically connects the motor, a ground contact arranged on the motor housing (8), and a plug or a socket (34) arranged on the outside of the terminal box (12). The ground contact arranged on the motor housing is connected in an electrically conductive manner to a ground contact of the plug or socket (34) and to at least one conductor inside the terminal box (12). The electric connection between the ground contact arranged on the motor housing (8) and the ground contact of the plug or socket (34) is arranged outside of the terminal box (12).

Claims18

Dependent claims

A heating circulation pump comprising:

an electric motor;
a pump housing;
a motor housing connected to the pump housing;
a pump impeller arranged in the pump housing and driven by the electric motor arranged in the motor housing;
and
a terminal box formed of plastic and fastened on the motor housing, wherein the terminal box receives electrical and/or electronic components of a motor control as well as an electrical connection of the motor, with an earthing contact arranged on the motor housing and with a plug or socket of an electric plug-in connection for the electrical connection, said plug or socket being arranged at an outside on the terminal box, wherein the earthing contact arranged on the motor housing is connected in an electrically conductive manner to an earthing contact of the plug or of the socket as well as to at least one lead in an inside of the terminal box, the electrical connection for the earthing contact arranged on the motor housing and the earthing contact of the plug or of the socket is arranged outside the terminal box, and wherein the earthing contact of the plug or of the socket is branched into two contact legs, of which one leg engages into the motor housing, and the other leg is arranged on an outer side of the motor housing at a distance thereto, said motor housing comprising a first projection and a second projection, said first projection and said second projection defining a leg receiving space, at least a portion of said one leg being arranged in said leg receiving space, said at least said portion of said one leg engaging said first projection and said second projection, said at least said portion of said one leg being located at a spaced location from an interior of said terminal box.

3 more elements

A heating circulation pump comprising:

an electric motor;
a pump housing;
a motor housing connected to the pump housing, the electric motor being arranged in the motor housing;
a pump impeller arranged in the pump housing and driven by the electric motor;
a terminal box formed of plastic and fastened on the motor housing, the terminal box receiving electrical and/or electronic components of a motor control;
and
an electrical connection of the motor, the electrical connection comprising a ground contact arranged on the motor housing and an electric plug-in connection for the electrical connection comprising plug or socket arranged at an outside of the terminal box, wherein the electrical connection of the motor comprises a connection of the ground contact arranged on the motor housing in an electrically conductive manner to a ground contact of the plug or of the socket and to a lead in an inside of the terminal box, wherein the electrical connection for the ground contact arranged on the motor housing and the electric plug-in connection ground contact is arranged external to the terminal box, wherein the electrical connection for the ground contact arranged on the motor housing and the electric plug-in connection ground contact is arranged at a spaced location from an interior of the terminal box, and wherein the electric plug-in connection ground contact is branched into two contact legs, of which one leg engages into the motor housing, and the other leg is arranged on the outer side of the motor housing at a distance thereto, said motor housing comprising a first projection and a second projection, said first projection and said second projection defining a leg receiving space, at least a portion of said one leg being arranged in said leg receiving space, said at least said portion of said one leg being in contact with said first projection and said second projection, said at least said portion of said one leg being located at a spaced location from said interior of said terminal box.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/004,607Filed 24 Feb 2012
Priority: EP 1100207212 Mar 2011
Published: US 2014/0030124 A130 Jan 2014
Granted: 10 Jan 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

H02K 5/225
Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes: terminal boxes or…
F04D 13/06
Units comprising pumps and their driving means: the pump being electrically driven
F04D 13/0606
The pump being electrically driven: canned motor pumps
F04D 13/0626
Canned motor pumps: details of the can