Heat pump drying device and using method thereof

Abstract

The invention discloses a heat pump drying device and a using method thereof. The heat pump drying device comprises a heat pump circulating sub system and a drying circulating sub system; a compressor, a heat adjusting device, a condenser, a throttling part, an evaporator and a pre-cooling heat exchanger are connected through pipelines to form the heat pump circulating sub system; the drying circulating sub system comprises a drying chamber, air passages and a drying draught fan; the drying draught fan, the pre-cooling heat exchanger, the evaporator and the condenser are mounted in the air passages, or air inlets and air outlets of the drying draught fan, the pre-cooling heat exchanger, the evaporator and the condenser are connected with the front and rear air passages; and a temperature sensor and a humidity sensor are mounted in the drying chamber or the air passage adjacent to the drying chamber. According to the heat pump drying device and the using method thereof, the problems that as for an existing drying device, functions are few, the drying application range is small, energy consumption is large, damage is large, and emission is large are solved, the functional multiformity and efficiency of the drying system are achieved, the application range is widened, damage of dried objects and emitting of waste gas are reduced, and the flexibility and reliability of the heat pump system are improved.

Description

technical field [0001] The invention relates to a drying device and a drying method, in particular to a heat pump drying device and a using method thereof. Background technique [0002] Common drying devices in the prior art are divided into electric heating drying devices and heat pump drying devices. Drying devices are often used in drying fields such as clothes, materials, chemicals, food or agricultural, forestry, animal husbandry and fishery products. However, the existing drying devices and their drying methods usually have the following problems: they usually rely on heating equipment to heat the air to a high temperature and then dry the objects. Diversified drying methods, the dry matter is easy to be damaged and deteriorated, the scope of drying is very small, and usually a large amount of waste gas and waste heat need to be discharged, the energy consumption is large, the drying efficiency is low, and it is easy to pollute the environment, and the common heat pump...

AI Technical Summary

Problems solved by technology

However, the existing drying devices and their drying methods usually have the following problems: they usually rely on heating equipment to heat the air to a high temperature and then dry the objects. Diversified drying methods, the dry matter is easy to be damaged and deteriorated, the scope of drying is very small, and usually a large amount of waste gas and waste heat need to be discharged, the energy consumption is large, the drying efficiency is low, and it is easy to pollute the environment, and the common heat pump drying system is harmful to drying The adaptability to process changes is small, and the compressor is prone to liquid hammer, which affects the reliability of the system

It can be seen from the technical mechanism of the above-mentioned patent that, in addition to dividing the drying process into two stages and setting different evaporation temperatures, the patented technology still basically follows the conventional high-temperature drying technology, which fails to solve the problem of conventional drying. The above-mentioned problems in the technology

Moreover, the auxiliary condenser described in this patent is connected to the back of the condenser. The refrigerant discharged from the compressor in the heat pump cycle first enters the condenser for cooling. In this state, the cooled liquid refrigerant enters the auxiliary condenser. Even if the auxiliary condenser is turned on, the heat dissipation capacity of the auxiliary condenser becomes very small, which has no effect on the working state of the heat pump system. In addition, there is no pre-cooler installed in this technology. If the working conditions of the heat pump system change greatly, the refrigerant flowing into the evaporator will also change greatly, which will easily cause the refrigerant to evaporate incompletely in the evaporator and cause The compressor is damaged by liquid return, so this patented technology does not have the ability to dry functional diversity

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