HEATING CIRCULATING PUMP

• US 20140050603A1
• Filed: 02/24/2012
• Published: 02/20/2014
• Est. Priority Date: 03/12/2011
• Status: Active Grant

• Current Assignee: Grundfos Management A/S (POUL DUE Jensen's FOND)
• Original Assignee: Grundfos Management A/S (POUL DUE Jensen's FOND)
• Inventors: Hoj, Finn Mathiesen
• Granted Patent: US 10,047,751 B2
• Time in Patent Office: Days
• US Class Current: 417/410.1
• CPC Class Codes: F04D 13/06 the pump being electrically driven
• CPC Class Codes: F04D 13/0626 Details of the can
• CPC Class Codes: F04D 13/064 Details of the magnetic circuit
• CPC Class Codes: F04D 13/0686 Mechanical details of the pump control unit pump control F04D15/00
• CPC Class Codes: F04D 29/026 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/426 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/5813 Cooling the control unit
• CPC Class Codes: F04D 29/5893 heat insulation or conduction
• CPC Class Codes: F05D 2230/20 essentially without removing material
• CPC Class Codes: F05D 2230/232 by welding
• CPC Class Codes: F05D 2300/43 Synthetic polymers, e.g. plastics; Rubber
• CPC Class Codes: H02K 11/40 Structural association with grounding devices
• CPC Class Codes: H02K 2203/03 Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations
• CPC Class Codes: H02K 5/10 with arrangements for protection from ingress, e.g. water or fingers
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132

Abstract

A heating circulating pump includes a pump housing (1) containing a pump impeller driven by an electric motor. The stator thereof is arranged in a motor housing (8) connected to the pump housing (1). A terminal box (12) is arranged on the motor housing (8), for electrically connecting the motor winding and for receiving electrical and/or electronic components of the motor control system. The terminal box (12) includes at least two parts that are bonded to each other, and the terminal box (12) is designed such that it is sealed from the motor and from the surrounding environment.

Claims

1. A heating circulation pump comprising:

an electric motor with a motor winding and stator;

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 whose stator is arranged in the motor housing; and

a terminal box arranged on the motor housing, the terminal box being provided for the electric connection of the motor winding and for receiving electrical and/or electronic components of a motor control, the terminal box comprising two parts which are connected to one another with a material fit, and that the terminal box is designed in a sealingly closed manner to the motor and to the surroundings.

2. A heating circulation pump according to claim 1, wherein the terminal box is formed from at least two components which are formed of thermoplastic plastic and are sealingly and unreleasably connected to one another by way of welding.

3. A heating circulation pump according to claim 1, wherein the terminal box comprises a container which is open at one side and which is closed by a cover.

4. A heating circulation pump according to claim 1, wherein the terminal box is manufactured from plastic injection molded parts.

5. A heating circulation pump according to claim 1, wherein the terminal box is arranged at the axial side of the motor housing which is away from the pump housing.

6. A heating circulation pump according to claim 1, wherein the motor is designed as a wet-running motor with a motor-side shaft end that is accessible via a closable housing opening and the terminal box is designed in an annular manner.

7. A heating circulation pump according to claim 1, wherein the terminal box base is closed and is arranged distanced to the axial end wall of the motor.

8. A heating circulation pump according to claim 1, wherein electric contacts are molded into a terminal box base and are formed into part of an electric plug-in connection and an electric plug counterpart is formed on the stator side for the electric connection to the motor winding.

9. A heating circulation pump according to claim 1, wherein the electrical contacts are molded into a side wall of the terminal box and are formed into a part of a plug-in connection as a plug or as a socket.

10. A heating circulation pump according to claim 1, wherein the terminal box is fastened on the motor housing and/or pump housing by way of at least one snap connection.

11. A heating circulation pump according to claim 1, wherein a heat distributor is arranged on or in the terminal box wall at a side which does not face the motor housing.

12. A heating circulation pump according to claim 11, wherein the heat distributor consists of metal.

13. A heating circulation pump according to claim 11, wherein the heat distributor consists of a thermally conductive plastic and is manufactured with the two-component injection molding method together with a component of the terminal box.

14. A heating circulation pump according to claim 1, wherein the at least two components forming the terminal box are connected to one another byway of laser welding, wherein one of the components is transparent to the beam of the laser and the other component is non-transparent to the beam of the laser.

15. A heating circulation pump according to claim 14, wherein:

the two components comprise a cover and a container which is open at one side and which is closed by the cover; and

the container open at one side is formed of material which is non-transparent for the laser beam and that the cover is formed from material which is transparent to the laser beam.

16. A heating circulation pump comprising:

an electric motor with a motor winding and stator;

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; and

a terminal box arranged on the motor housing, the terminal box being provided for the electric connection of the motor winding and for receiving electrical and/or electronic components of a motor control, the terminal box comprising a first part and a second part cooperating to form a material fit connecting the first part to the second part to form a sealed interior of the terminal box that is sealed in a closed manner to the motor and to the surroundings.

17. A heating circulation pump according to claim 16, wherein the first part and the second part formed of thermoplastic plastic and are sealingly and unreleasably connected to one another by a weld.

18. A heating circulation pump according to claim 17, wherein the first part comprises a container open at one side and the second part comprises a cover.

19. A heating circulation pump according to claim 17, wherein the weld connecting the first part and the second part is formed by laser welding, wherein the first part is at least partially transparent to the beam of the laser and the second part is non-transparent to the beam of the laser.

20. A heating circulation pump according to claim 19, wherein:

the first part comprises a container open at one side and the second part comprises a cover; and

the container is at least partially formed of material which is non-transparent for the laser beam and that the cover is formed from material which is transparent to the laser beam.