Household appliance, in particular laundry dryer, having heat pump comprising expansion device

Abstract

The invention relates to a household appliance comprising a heat pump which comprises a heat source for outputting heat, a heat absorbing device for absorbing heat and a working medium circulation system for pumping heat from the heat absorbing device into the heat source. The working medium circulation system comprises a compressor, an expansion device, a self-closed first pipeline system and a control device; the first pipeline system is used for circulating a working medium from the compressor to the heat source, from the heat source to the expansion device, from the expansion device to the heat absorption device and from the heat absorption device to the compressor. The expansion device comprises a valve which can be controlled by a control device. In this case, the expansion device has a static expander, through which the working medium can flow in parallel with the controllable valve. The household appliance is designed in particular as a laundry dryer.

Description

technical field [0001] The invention relates to a household appliance comprising a heat pump comprising a heat source for outputting heat, a heat sink for absorbing heat and a working medium circulation system for pumping heat from the heat sink to the heat source, said The working medium circulation system includes a compressor, an expansion device, a self-closed first pipeline system and a control device, and the first pipeline system is used to transfer the working medium from the compressor to the heat source, from the heat source to the expansion device, and from the expansion device to and from the heat sink to the compressor, and the expansion device includes valves controllable by control means. Background technique [0002] Document EP 2 513 368 B1 discloses a domestic appliance which is constructed in particular as a laundry dryer and which has a heat pump with a compressor and an expansion system in which a reversible The Rankine process to pump heat from a heat ...

AI Technical Summary

Problems solved by technology

[0009] The use of flammable operating media and electronically controllable expansion valves in heat pumps of domestic appliances necessitates the additional use of pressure-sensitive electrical limiting devices, requiring considerable outlay for additional costs in the development and manufacture of said domestic appliances.

Despite the advantages associated therewith, the expense can be problematic for the economics of using an electronically controlled expansion valve

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