一、工作原理與適用范圍 Working principle and scope of application

熱泵干燥機是利用逆卡諾原理，吸收空氣的熱量并將其轉移到房內(nèi)，實現(xiàn)烘干房的溫度提高，配合相應的設備實現(xiàn)物料的干燥。熱泵烘干機工作同時又在回收干燥室排出的濕熱空氣中所含的顯熱和潛熱，需要輸入的能量只有熱泵壓縮機的耗功，而壓縮機又有消耗少量功即可鋪集搬運大量熱量的優(yōu)勢，因此熱泵烘干機組加熱效率遠大于其他方式的烘干設備，可以實現(xiàn)節(jié)能減排的效果。

熱泵烘干機組主要適用于農(nóng)副產(chǎn)品脫水烘干，如銀耳、瓜子、花生、果蔬、肉制品、腸衣、煙葉、香菇、枸杞、糧食、腐竹、海產(chǎn)品、中藥材等。化工方面也有大量應用，如紙品、木材、污泥、石膏、粘土、煤泥等的烘干。在工業(yè)熱水方面，還可滿足電鍍廠電鍍液的恒溫、屠宰場高溫熱水的加熱和保溫，星級酒店高溫熱水的供應和工業(yè)企業(yè)高溫熱水的需求以及床上用品的烘干等。

Heat pump drier utilizes the reverse Carnot's principle to absorb the heat of air and transfer it to the room to realize the temperature increase of the drying room and cooperate with corresponding equipment to realize drying of materials. The heat pump drier recycles the sensible heat and potential heat contained in the wet and hot air exhausted by the drying room while operating, the energy that shall be input is the power consumption of heat pump compressor only, and the compressor has the advantage that a lot of heat can be gathered and transferred by consuming a small amount of power, therefore, heating efficiency of heat pump drying unit is much larger than that of other drying equipment and it can realize the effects of energy conservation and emission reduction.

Heat pump drying unit is mainly suitable for dehydration and drying of agricultural and sideline products, such as tremella, melon seeds, peanuts, fruits and vegetables, meat products, casing, tobacco, mushrooms, medlar, grain, dried bean milk cream in tight rolls, marine products, traditional Chinese medicinal materials. It is also widely used in chemical aspect, for example, drying of paper products, wood, sludge, gypsum, clay, coal slime, etc. In the industrial hot water aspect, it can also meet meet the requirements of constant temperature of electroplate liquid of electroplate factory, heating and heat preservation of high-temperaturehot-water of slaughter house, supply of star hotel high temperature hot water and high-temperature hot water of industrial enterprises, and drying of bedding article.

二、特點Characteristics

1. 高效節(jié)能。熱泵干燥裝置SMER（消耗單位能量所除去濕物料中的水分量）通常為1.0～4.0kg/kWh，而傳統(tǒng)對流干燥器的SMER值約為0.2～0.6kg/Kwh。

2. 可實現(xiàn)低溫空氣封閉循環(huán)干燥，物料干燥質量好。通過控制裝置的工況，使干燥室的熱干空氣的溫度在20～80℃之間，可滿足大多數(shù)熱敏物料的高質量干燥要求；干燥介質的封閉循環(huán)，可避免與外界氣體交換所可能對物料帶來的雜質污染，這對食品、藥品或生物制品尤其重要。此外，當物料對空氣中的氧氣敏感（易氧化或燃燒爆炸）時，還可采用惰性介質代替空氣作為干燥介質，實現(xiàn)無氧干燥。

3. 環(huán)境友好。熱泵干燥裝置中干燥介質在其中封閉循環(huán)，沒有物料粉塵、揮發(fā)性物質及異味隨干燥廢氣向環(huán)境排放而帶來的污染；干燥室排氣中的余熱直接被熱泵回收來加熱冷干空氣，沒有機組對環(huán)境的熱污染。

4. 與其它低溫（進干燥室空氣溫度<>

Efficient and energy-saving. Heat pump drying unit’s SMER (Specific Moisture Extraction Rate ) is generally 1.0～4.0kg/kWh and SMER value of traditional convection drier is about 0.2～0.6kg/Kwh.
It can realize low-temperature air closed cycle drying and has good material drying quality. Through controlling the working condition of unit, the temperature of hot and dry air in the drying room is at 20～80℃. It can meet the high quality drying requirements of most of the heat sensitive materials; closed cycle of drying medium can prevent the impurity contamination possibly brought by exchange with external gas to the materials, which is very important for food, drugs or biological products. In addition, when the materials are sensitive to the oxygen in the air (easy for oxidation or burning e xplosion, the inert medium can be used as a drying medium instead of air to realize anaerobic drying.
It is environment-friendly. The drying medium conducts a closed cycle in the hot pump drying unit without contamination of material dust, volatile substance and peculiar smell brought by discharge of drying waste gas to the environment; the afterheat in the exhaust gas of drying room is directly recycled by heat pump to heat the cool and dry air without thermal pollution of unit to environment.
Compared with other low-temperature (inlet air temperature of drying room<40℃) drying="" units="" (such="" as="" microwave="" drying,="" vacuum="" drying="" and="" freeze="" drying),="" heat="" pump="" drying="" unit="" has="" obvious="" economical="" efficiency="" due="" to="" small="" initial="" investment="" of="" equipment="" and="" low="" operation="" cost.="" the="" heat="" pump="" drying="" unit="" is="" mainly="" composed="" of="" heat="" pump="" and="" drying="" room,="" of="" which="" the="" drying="" room="" has="" the="" same="" requirements="" with="" convection="" drying="" room,="" without="" special="" air="" tightness="" and="" pressure-bearing="">