BLDC Motor with Heat Recovery System
AssigneeBleckmann GmbH & Co. KG
InventorsHubert Unterberger, Markus Dannenhauer
Life of this patent
Estimating the term…
Abstract
The present invention provides a pump assembly for use in a household appliance comprising a pump, an electric motor having a rotor and a stator and a heat exchanger arranged to be in thermal contact with at least a portion of the stator. There is further provided a heat recovery system for use in a household appliance comprising a main fluid circuit, a fluid reservoir, a heat exchange circuit and a pump assembly for pumping working fluid through the main fluid circuit. The pump assembly comprises an electric motor, a heat exchanger provided in thermal contact with at least a portion of the electric motor, the heat exchanger being configured to transfer heat from the electric motor to a liquid coolant circulating in the heat exchange circuit.
Claims20
Pump assembly for use in a household appliance, the pump assembly comprising:
- at least one pump;
- an electric motor comprising a rotor and a stator, the electric motor being configured to drive the pump for pumping a working fluid;
- and
- at least one heat exchanger comprising at least one coolant inlet, at least one coolant outlet and at least one coolant duct for liquid coolant extending between the coolant inlet and the coolant outlet;
- wherein the heat exchanger is arranged such that the coolant duct is in thermal contact with at least a portion of the stator for transferring heat form the stator to said liquid coolant.
Heat recovery system for use in a household appliance, the heat recovery system comprising:
- a main fluid circuit configured to circulate a working fluid;
- a fluid reservoir configured to store fluid and to supply said fluid to the main fluid circuit;
- a heat exchange circuit provided separate from the main fluid circuit, the heat exchange circuit being configured to heat fluid stored in the fluid reservoir;
- and
- a pump assembly configured for pumping working fluid through the main fluid circuit, the pump assembly comprising:
- at least one pump;
- at least one electric motor configured to drive the at least one pump;
- and
- a heat exchanger provided in thermal contact with at least a portion of the electric motor;
- wherein the heat exchanger is configured to transfer heat from the electric motor to a liquid coolant circulating in the heat exchange circuit.
Method for operating a household appliance comprising a main fluid circuit, a heat exchange circuit and a fluid reservoir connected to the main fluid circuit and the heat exchange circuit, the method comprising the steps of:
- providing a predetermined amount of water to the fluid reservoir for temporary storage;
- preheating the water temporarily stored in the fluid reservoir to an intermediate temperature by circulating at least a portion of the water through a heat exchange circuit;
- and
- supplying at least a portion of the preheated water to a main fluid circuit.
Dependencies are inferred from the claim text.