Heat pump negative pressure efficient drying machine and drying method thereof

Abstract

The invention discloses a heat pump negative pressure efficient drying machine and a drying method of the heat pump negative pressure efficient drying machine. The drying machine comprises a box body (1), a negative pressure vacuum pump (9), a heat pump compressor (16), an evaporator (12), a throttling valve (15) and a condensate water outlet (11), wherein a control system (19), a rotary drum (2), a condenser (6) and a centrifugal fan (7) are arranged in the box body (1). One end of the negative pressure vacuum pump (9) is connected with the box body (1) through a pipeline, and the other end of the negative pressure vacuum pump (9) is connected with the evaporator (12) through a pipeline. One end of the throttling valve (15) and one end of the heat pump compressor (16) are connected with the evaporator (12) through a pipeline, and the other end of the throttling valve (15) and the other end of the heat pump compressor (16) are connected with the condenser (6) through a pipeline. The condensate water outlet (11) is connected with the lower portion of the evaporator (12). According to the drying machine, wasted heat sources of kitchens, industrial wasted heat sources and other wasted heat sources can be fully utilized, water is rapidly evaporated through a negative pressure technology, and heat energy consumption and heat emission are reduced.

Description

technical field [0001] The invention relates to an energy-saving dryer, in particular to a heat pump negative pressure high-efficiency dryer. [0002] The present invention also relates to a drying method using the heat pump negative pressure high-efficiency dryer. Background technique [0003] A dryer is generally a device used to remove moisture from washed items. Most dryers consist of a rotating drum around which hot air is used to evaporate the water. A traditional dryer heats the items to be dried in the drum to a higher temperature, such as above 100° C., and evaporates the water in the items through high temperature. However, the traditional dryer has the following defects: [0004] 1. It consumes a lot of energy. By heating the water above the boiling point and volatilizing the water through high temperature to achieve the purpose of drying, it needs to provide a higher temperature for a long time, so it will consume a lot of energy. [0005] 2. Excessively high ...

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Problems solved by technology

[0004] 1. It consumes a lot of energy. By heating the water above the boiling point and volatilizing the water through high temperature to achieve the purpose of drying, it needs to provide a higher temperature for a long time, so it will consume a lot of energy

[0005] 2. Excessively high temperature is easy to cause damage to the dried items. For example, the structure and organization of some items are easily damaged and deformed under high temperature conditions, resulting in loss

[0006] 3. The environment is not friendly, and a large amount of high-temperature water vapor is emitted, which is not conducive to the waste heat and then look back

[0007] 4. The requirement of heat source is high. Since the temperature needs to be heated above 100°C, a high-power power supply is required to continuously provide heat or a high-pressure boiler is required to provide high-temperature water vapor, so it is inconvenient to use

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