Hot air drying system heated by double energy sources

Abstract

The invention discloses a hot air drying system heated by double energy sources, which comprises a heating chamber with a fresh air opening, a drying chamber, a solar heating device, an air source heat pump and a condenser fan of the air source heat pump, wherein the upper part of the heating chamber or the drying chamber is provided with a dehumidifying opening; a condenser and the condenser fan of the air source heat pump are arranged in the heating chamber; a hot water heat exchanger of the solar heating device is arranged at the front end of an air inlet of the condenser in the heating chamber; the condenser fan supplies air in an induced draft way; the ratio of the heat exchange area of the condenser to the input power of a compressor is 5.3 to 11 m<2> / kW; the ratio of the heat exchange area of the hot water heat exchanger to the input power of the compressor is not less than 1.5 m<2> / kW; and the total pressure of the condenser fan is 100 to 400 Pa. The hot air drying system heated by the double energy sources makes full use of solar energy as a hot air heat source for drying, solves the problems of the independent use of the solar energy, achieves high energy efficiency ratio by adopting the air heat pump as the hot air heat source, is energy-saving, environmentally-friendly and low in running cost, and manifests the advantages of the combined use of the air source and the solar energy in oven-drying.

Description

technical field [0001] The invention relates to a hot air drying system, in particular to a hot air drying system using dual energy sources of a solar water heater and an air source heat pump for heating. Background technique [0002] Agricultural products, firecracker raw materials, and Chinese medicinal materials all need to be dried, and the drying temperature is required to be between 40°C and 70°C. There are many types of existing drying devices, and their heat sources are mostly heated by coal-fired (oil) boilers. The main disadvantage is the waste of energy. , The waste residue and waste gas produced by coal (oil) combustion pollute the environment; although electric heating is environmentally friendly, its energy efficiency ratio is too low to be applied in production. From the point of view of energy conservation and environmental protection, only renewable energy - solar energy. [0003] The solar heating device includes a solar water heater, a hot water heat exch...

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Problems solved by technology

[0002] Agricultural products, firecracker raw materials, and Chinese medicinal materials all need to be dried, and the drying temperature is required to be between 40°C and 70°C. There are many types of existing drying devices, and their heat sources are mostly heated by coal-fired (oil) boilers. The main disadvantage is the waste of energy. , the waste residue and waste gas produced by coal (oil) combustion pollute the environment; although electric heating is environmentally friendly, its energy efficiency ratio is too low to be applied in production

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