An air source heat pump fan for reducing defrosting temperature

Abstract

The invention discloses an air source heat pump air blower for reducing the defrosting temperature. The casing of the heat pump is divided into an evaporator chamber and a condenser chamber; the evaporator chamber is divided into an air inlet chamber and an air outlet chamber by the evaporator. The air outlet of the air outlet chamber is equipped with an evaporator fan, and the air inlet chamber is provided with a fresh air inlet; the condenser chamber is divided into a return air chamber and a supply air chamber by the condenser, and the return air heated by circulation is input into the return air chamber, and the return air chamber is also The fresh air is supplemented through the B air duct, and the air supply chamber sends hot air outward through the condenser fan; the air inlet chamber and the return air chamber are connected through the A air duct, the inlet of the A air duct is located in the return air chamber, and the outlet of the A channel Located in the air intake cavity. Through the air duct, the hot and humid return air in the drying room is sent to the air inlet of the evaporator, and the evaporator is heated to increase the temperature of the evaporator, so that the defrosting temperature can be reduced by 8-10°C, which largely avoids the disadvantages caused by the start of the defrosting process as a result of.

Description

technical field [0001] The invention relates to an air source heat pump technology. technical background [0002] The air source heat pump heat fan is mainly composed of a condenser, a condenser fan, a compressor, a four-way reversing valve, a throttling device, an evaporator, and an evaporator fan. Connected with working fluid pipes to form a circulation loop. [0003] The air source heat pump hot air blower is used as the heating equipment to dry the agricultural products and other materials, and the material is heated with heat energy higher than or significantly higher than the material temperature. High, after the material is heated, its moisture absorbs heat and evaporates or vaporizes from the surface to the inside, and the water molecules together with the heating medium become hot and humid air, which is discharged to the drying room by the dehumidification fan. [0004] In winter and spring, when the ambient temperature is 4 °C and below, the temperature of the e...

AI Technical Summary

Problems solved by technology

Therefore, when the air source heat pump fan works at an ambient temperature of 4°C or below, the actual energy efficiency ratio will be reduced by 20-25%. In the defrosting process, when defrosting, the heating of the equipment is not used for drying, which means that 18% of the time of equipment work per hour is not used for heating, which means that the heating capacity of the equipment is reduced by 18%. In other words, it will significantly reduce the production capacity of the equipment

At the same time, when the equipment switches from the defrosting condition to the heating condition, the heating capacity in the first few minutes is reduced, and the material cannot be heated

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