Domestic appliance for drying a humid product, comprising a cooling assembly and a heating assembly

Abstract

The domestic appliance is designed to dry a humid product (2) by means of a process air stream that can be conducted in a process air channel (3), said stream flowing through a treatment chamber (5) comprising the product (2) and a cooling assembly (6, 7) for cooling and condensing the process air stream once the latter has passed through the treatment chamber (5). The cooling assembly (6, 7) hasa first heat exchanger (6), by means of which heat from the process air stream can be supplied to a working fluid, and a heating assembly (8, 8A, 8B) connected downstream of the cooling assembly for heating the process air stream before the latter flows through the treatment chamber (5), said heating assembly having a second heat exchanger (8), by means of which heat from the working fluid can besupplied to the process air stream. The working fluid is conducted in a heat pump (V1, V2 ), which operates according to a regenerative gas process and has at least two displacement pistons (12, 15).At least one heat exchanger (6, 8A, 8B) is located at the side of at least one of the displacement pistons (12, 15).

Description

technical field [0001] The invention relates to a domestic appliance for drying wet articles by means of a process air flow which can be conducted in a process air channel, the process air flow passing through: a treatment chamber containing the articles; a cooling assembly , the cooling assembly for cooling and condensing the process air stream after it passes through the process chamber, the cooling assembly has a first heat exchanger by means of which heat from the process air stream can be supplied to a working fluid; and a heating assembly for heating the flow of process air before it passes through the processing chamber, the heating assembly having a second heat exchanger through which heat from the working fluid can be A second heat exchanger feeds the process air stream. [0002] The invention also relates to a method for drying wet items by means of a process air flow conducted in a process air channel, the process air flow passing through: a treatment chamber compr...

AI Technical Summary

Problems solved by technology

This is sometimes difficult to adjust the heat pump to the desired temperature level in the household appliance

Thermoelectric heat pumps require the use of specialized expensive semiconductor devices and create specific problems with thermal isolation and dry air conduction because heat can only be pumped over relatively short physical distances

This makes corresponding household appliances difficult to construct

Also, every existing heat pump in a household appliance only reaches optimal operating conditions rather slowly when started

This prolongs the time required for the drying process, which must be taken into account for the user, as this is very disadvantageous and most likely because household appliances including heat pumps are usually sold at very high prices and correspondingly high expectations was purchased

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