Liquid-cooled pump control device and fluid pump assembly

• US 20060078444A1
• Filed: 07/13/2005
• Published: 04/13/2006
• Est. Priority Date: 09/17/2004
• Status: Abandoned Application

• Current Assignee: Pumpenfabrik Ernst Vogel Gesellschaft GmbH
• Original Assignee: Pumpenfabrik Ernst Vogel Gesellschaft GmbH
• Inventors: Sacher, Manfred
• Application Number:
  US11/181,203
• Publication Number:
  US 20060078444A1
• Time in Patent Office: Days
• US Class Current: 417/423.300
• CPC Class Codes: F04B 49/065 and making use of computers
• CPC Class Codes: F04B 53/08 Cooling; Heating; Preventing freezing
• CPC Class Codes: F04D 13/06 the pump being electrically driven
• CPC Class Codes: F04D 15/0066 by changing the speed, e.g. of the driving engine
• CPC Class Codes: F04D 29/5813 Cooling the control unit

Abstract

In a pump control device (1, 1′) comprising a casing (2, 3; 2′, 3′) and a speed controller (20), in particular a frequency converter, arranged in the casing for controlling the rotational speed of an electric drive motor (103; 103′) of a fluid pump (100; 100′), the casing includes a section (3; 3′) of good thermal conductivity in which a cavity (4; 4′) is formed which exhibits connections (5, 6, 7; 5′, 6′) for coupling with the output (102; 102′) of a fluid pump (100; 100′) to be controlled by the pump control device and with pipes so that the cavity (4; 4′) can be passed through by the entire fluid stream delivered by the fluid pump, wherein the speed controller (20) is connected in a heat-conducting manner to the casing portion (3; 3′) of good thermal conductivity.

Claims

1. A pump control device comprising a casing and a speed controller, in particular a frequency converter, arranged in the casing for controlling the rotational speed of an electric drive motor of a fluid pump, wherein the casing includes a section of good thermal conductivity in which a cavity is formed which exhibits connections for coupling with the output of a fluid pump to be controlled by the pump control device and with pipes so that the cavity can be passed through by the entire fluid stream delivered by the fluid pump and that the speed controller is connected in the heat-conducting manner to the casing portion of good thermal conductivity.

2. A pump control device according to claim 1, wherein components of the speed controller are directly adjacent to the casing portion of good thermal conductivity.

3. A pump control device according to claim 1, wherein components of the speed controller are connected to the casing portion of good thermal conductivity via heat conducting means.

4. A pump control device according to claim 1, wherein the casing portion of good thermal conductivity is designed in one piece, preferably as a casting.

5. A pump control device according to claim 4, wherein the casing portion of good thermal conductivity is manufactured from metal or a metal alloy such as brass.

6. A pump control device according to claim 1, wherein the casing portions of good thermal conductivity exhibits a passage opening into the cavity for the connection of a sensor.

7. A pump control device according to claim 1, wherein recesses are formed in the casing portion of good thermal conductivity, which recesses project into the cavity or are arranged adjacent to a cavity wall.

8. A pump control device according to claim 1, wherein the connections of the casing portion of good thermal conductivity comprise flanges or bushings.

9. A pump control device according to claim 1, wherein the casing portion of good thermal conductivity is configured as a casing bottom connectable to a casing lid in a fluid-tight manner.

10. A pump control device according to claim 1, wherein the casing portion of good thermal conductivity is configured as a tubular wall which defines the cavity through which the entire fluid stream delivered by the fluid pump can flow.

11. A fluid pump assembly comprising a fluid pump and an electric drive motor driving the fluid pump, wherein a pump control device according to claim 1, controlling the drive motor, is connected to the output of the fluid pump.

12. A fluid pump assembly according to claim 11, wherein the pump control device has a remote operating element which communicating via control lines with the pump control device.

13. A fluid pump assembly according to claim 12, wherein the control lines supply of supply electric energy to the pump control device and to the electric drive motor.

14. A fluid pump assembly according to claim 13, wherein the fluid pump comprises a submersible motor-driven pump.

15. A fluid pump assembly according to claim 14, wherein the pump control device is connected substantially coaxially to the submersible motor-driven pump.

16. A fluid pump assembly according to claim 15, wherein a pressure sensor is integrated in the pump control device.