Heat exchanging device and method therefor

Abstract

A heat exchanging device having a first hollow profile configured to conduct a first medium, a second hollow profile configured to conduct a second medium, and where at least a part of the second hollow profile is wound around at least a part of the first hollow profile. A nominal width of the second hollow profile is smaller than a nominal width of the first hollow profile. An outer surface of the first hollow profile comprises a first contact portion, an outer surface of the second hollow profile comprises a second contact portion, and the first contact portion and the second contact portion are coupled by means of a soldered connection.

Description

BACKGROUND[0001]Technical Field[0002]The disclosure relates to a heat exchanging device, to a heat pump, to a domestic appliance, to a method of operating a heat exchanging device, and to a method of providing a heat exchanging device.[0003]Description of the Related Art[0004]Many domestic appliances, such as, e.g., dishwashers or washing machines, are designed to heat water during operation of the appliance. Heating up water requires however a substantial amount of energy, where the domestic appliances at the same time produce wastewater that is often still warm. Efforts have thus been made to recover the thermal energy of wastewater in domestic appliances.[0005]DE2743333A1 discloses a heat recovery system recovering heat from waste water from washing basins, sinks, bidets and showers. These sanitary installations have hot and cold water supply and smell trap in outlet. Heat recovered is used for fresh water preheating. The smell trap itself or a connected vessel forms heat exchang...

AI Technical Summary

Benefits of technology

The patent describes a method of using two fluids in a system to prevent corrosion. The first fluid is typically water carrying dirt particles, while the second fluid is a refrigerant or a pure, non-polluted fluid that does not come into contact with the first fluid. Another design feature is that the second hollow profile, which contains the second fluid, does not touch the first fluid. This prevents any material from coming into contact with the first fluid and potentially causing corrosion. By maintaining a small width for the second hollow profile, the system minimizes heat transfer along its length, reducing temperature differences. This helps to maintain system performance.

Problems solved by technology

Heating up water requires however a substantial amount of energy, where the domestic appliances at the same time produce wastewater that is often still warm.

There is however a problem with the prior art when a first medium (e.g., wastewater) completely surrounds a hollow profile carrying the second medium (e.g., fresh water).

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