Circulation pump, heating system and method of determining the flow rate of a liquid through a pipe
First Claim
Patent Images
1. Circulation pump for a conveyed liquid, comprising:
- an electric motor, which is electronically commutated and has a rotor, a stator and a motor circuit; and
an impeller that is connected in a rotationally fixed manner to the rotor;
the motor circuit comprising an evaluation device, by means of which a flow rate of conveyed liquid through the circulation pump is determinable from at least one of a rotational speed of the rotor and a power consumption of the electric motor, andat least one external signal output, by which at least one of a flow rate signal and flow rate-dependent switching signal is suppliable out of the circulation pump,wherein;
the motor circuit comprises means for providing an operating mode with at least one of control to a constant motor power and control to a constant rotational speed,in the operating mode with the control to a constant motor power, the evaluating device is adapted to determine the flow rate with given defined motor power from the rotational speed, andin the operating mode with the control to a constant rotational speed, the evaluating device is adapted to determine the flow rate with given rotational speed from power consumption data provided by the motor circuit.
3 Assignments
0 Petitions
Accused Products
Abstract
A circulation pump for a conveyed liquid is provided. The circulation pump has an electric motor, which is electronically commutated, has a rotor, a stator and a motor circuit. An impeller is connected in a rotationally fixed manner to the rotor. The electric motor has an evaluation device for determining a flow rate of conveyed liquid through the circulation pump from a rotational speed of the rotor and/or a power consumption of the electric motor. At least one signal output is provided, by which a flow rate signal and/or flow rate-dependent switching signal can be supplied by the circulation pump.
15 Citations
25 Claims
-
1. Circulation pump for a conveyed liquid, comprising:
-
an electric motor, which is electronically commutated and has a rotor, a stator and a motor circuit; and an impeller that is connected in a rotationally fixed manner to the rotor; the motor circuit comprising an evaluation device, by means of which a flow rate of conveyed liquid through the circulation pump is determinable from at least one of a rotational speed of the rotor and a power consumption of the electric motor, and at least one external signal output, by which at least one of a flow rate signal and flow rate-dependent switching signal is suppliable out of the circulation pump, wherein; the motor circuit comprises means for providing an operating mode with at least one of control to a constant motor power and control to a constant rotational speed, in the operating mode with the control to a constant motor power, the evaluating device is adapted to determine the flow rate with given defined motor power from the rotational speed, and in the operating mode with the control to a constant rotational speed, the evaluating device is adapted to determine the flow rate with given rotational speed from power consumption data provided by the motor circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. Heating system for heating a liquid in a basin, comprising:
-
a flow-through region for liquid that is positioned outside a liquid receiving space of the basin; a heater that is disposed at the flow-through region; a control device for the heater; and a circulation pump for conveying the liquid through the flow-through region, wherein at least one signal output of the circulation pump is connected in a signal-effective manner to the control device; said circulation pump comprising; an electric motor, which is electronically commutated and has a rotor, a stator and a motor circuit; and an impeller that is connected in a rotationally fixed manner to the rotor; the motor circuit comprising an evaluation device, by means of which a flow rate of conveyed liquid through the circulation pump is determinable from at least one of a rotational speed of the rotor and a power consumption of the electric motor, and at least one external signal output, by which at least one of a flow rate signal and flow rate-dependent switching signal is suppliable out of the circulation pump, wherein; the motor circuit comprises means for providing an operating mode with at least one of control to a constant motor power and control to a constant rotational speed, in the operating mode with the control to a constant motor power, the evaluating device is adapted to determine the flow rate with given defined motor power from the rotational speed, and in the operating mode with the control to a constant rotational speed, the evaluating device is adapted to determine the flow rate with given rotational speed from power consumption data provided by the motor circuit.
-
-
21. Method of determining the flow rate of a liquid through a pipe, comprising:
-
conveying the liquid by means of a circulation pump, which has an electronically commutated electric motor; determining the flow rate by means of an evaluation device, which is integrated into the circulation pump, from at least one of the rotational speed of a rotor of the electric motor and a power consumption of the electric motor; and supplying, via an external signal output, at least one of a flow rate signal and flow rate-dependent switching signal out of the circulation pump, wherein; a motor circuit of the electric motor comprises means for providing an operating mode with at least one of control to a constant motor power and control to a constant rotational speed, in the operating mode with the control to a constant motor power, the evaluating device is adapted to determine the flow rate with given defined motor power from the rotational speed, and in the operating mode with the control to a constant rotational speed, the evaluating device is adapted to determine the flow rate with given rotational speed from power consumption data provided by a motor circuit of the electric motor. - View Dependent Claims (22, 23, 24, 25)
-
Specification