Who invented the heat pump dryer and which country invented it?

The two most common clothes dryers on the market are exhaust type and condensation type. As a professional washing machine manufacturer, Little Swan developed a heat pump dryer with its own innovation. The heat pump dryer integrates core innovative technologies such as heat pump circulating low-temperature (below 70℃) drying and condensation dehumidification, closed air duct structure design without damp and heat discharge, intelligent control based on temperature and humidity sensing (when clothes are dried), double channels for collecting and storing condensed water, and three-layer filtration. The energy efficiency level reaches above the EU directive A++, saving 40% electricity compared with the condensing dryer.

1. Hot air type

The working principle of hot air dryer is similar to that of hair dryer, which uses hot air generated by electric heating to take away moisture, but the difference is that the hot air dryer has a cover, which is convenient to gather heat and achieve the effect of drying clothes. However, it is impossible to heat only without removing heat, so the hot air dryer will also have an air outlet.

The drying temperature of hot air dryer is relatively high, generally at 100- 120℃. Although it feels "warm and fluffy", it is difficult to dry clothes evenly due to the structural problems of the equipment, and high temperature will also cause great damage to clothes. For high-quality clothes such as wool and silk, it is recommended to avoid using this hot air dryer.

Although the price of hot air dryer is low, it consumes a lot of energy and belongs to clothes drying household appliances that are on the verge of elimination.

2. Condensing type

The hot air dryer directly discharges hot air full of moisture, while the condensing type adds a condensing component, which can condense hot and humid air into liquid, and then discharge it into the sewer through the drainage pump, and the dried and cooled air enters the drying device again for the next round of work; There is also an anhydrous condensation technology, which uses the principle of cold and hot air exchange to cool the circulating air and then condense the air to achieve the purpose of drying.

The condensing dryer breaks the way of drying only by blowing hot air, and the drying temperature is generally 60-70℃, which not only reduces the damage of high temperature to clothes, but also does not need to consider whether there is an exhaust pipe, which is more suitable for the structure of Chinese bathroom. But its disadvantage is that the drying time is long, generally around 1 hour, and it naturally consumes electricity.