New search

Laundry dryer

Belongs to:
Kitchenware and household appliances
Synonyms:
Tumble dryer, Tumbler
Description:

A laundry dryer is an electric household appliance for quickly drying laundry mechanically with warm air. The drying process is composed of two steps: At frist, the remaining excess water has to be reduced by the spin dryer; after that, a warm air flow streams along the axis of the drum to the door, soaking up the humidity until its saturation limit is reached. Depending on the type of dryer, the air flow enriched with humidity is either condensed or lead outside. The alternating electric and magnetic fields at the fundamental frequency of 50 Hz resp. 60 Hz is caused by the motor for the rotation of the wasching drum and the heating of the air.

Frequency ranges:
  • 50–60 Hz
  • 10–150 kHz
Type of field:
electric and magnetic

Measurements (acc. to literature)

Measurand Value Feature Remarks
magnetic flux density 0.006668 µT (mean, measured) - spatially averaged value at distances from 30 cm - 3.05 m [1]
magnetic flux density 0.0112 µT (maximum, measured) - at a distance of 10 cm; measurement bandwidth: 10 - 150 kHz [2]
magnetic flux density 0.1–2 µT (measured) - at a distance of 30 cm [3]
magnetic flux density 0.1 µT (mean, measured) - average value of 7 devices at a distance of 1 m; measurement bandwidth: 40 - 800 Hz [4]
magnetic flux density 0.15 µT (mean, measured) - average of 2 devices at a distance of 50 cm; measurement bandwidth: 0 - 3000 Hz [5]
magnetic flux density 0.2 µT (mean, measured) - at a distance of 30.48 cm [6]
magnetic flux density 0.2–1 µT (measured) - measurement bandwidth at a distance of 15.24 cm [6]
magnetic flux density 0.3 µT (maximum, measured) - at a distance of 30.48 cm [6]
magnetic flux density 0.3 µT (mean, measured) - at a distance of 15.24 cm [6]
magnetic flux density 0.3–8 µT (measured) - at a distance of 3 cm [3]
magnetic flux density 0.34 µT (mean, measured) - average value of 7 devices at a distance of 50 cm; measurement bandwidth: 40 - 800 Hz
magnetic flux density 0.9 µT (measured) - at a distance of 20 cm; measurement bandwidth: 0 - 3000 Hz [5]
magnetic flux density 1.84 µT (mean, measured) - average of 2 devices at a distance of 10 cm; measurement bandwidth: 0 - 3000 Hz [5]
magnetic flux density 3.93 µT (mean, measured) - average value of 7 devices at a distance of 5 cm; measurement bandwidth: 40 - 800 Hz [4]
magnetic flux density 10.25 µT (maximum, measured) - at a distance of 40 cm [7]
magnetic flux density 10.5 µT (maximum, measured) - directly in front of the device [7]

References

  1. Mader DL et al. (1992): Residential exposure to 60-Hz magnetic fields from appliances
  2. Kurokawa Y et al. (2004): Evaluation of residential exposure to intermediate frequency magnetic fields
  3. Hofmann L et al. (2012): [BMU study "Environmental Impacts of 380-Kv-Cables and HVDC-Cables" - Report of the Workgroup on Technology/Economy]
  4. Preece AW et al. (1997): Magnetic fields from domestic appliances in the UK
  5. Ainsbury EA et al. (2005): An investigation into the vector ellipticity of extremely low frequency magnetic fields from appliances in UK homes
  6. No authors listed (1992): EMF in your Environment: Magnetic Field Measurements of Everyday Electrical Devices
  7. Farag AS et al. (1998): Electromagnetic fields in the home