Heat pump drying device and control method

CN115886302BActive Publication Date: 2026-05-29GUANGZHOU WIDE IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGZHOU WIDE IND
Filing Date
2023-01-10
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing heat pump curing equipment uses a fixed-frequency control system, which results in large temperature fluctuations inside the curing room, affecting the quality of tobacco curing.

Method used

By combining a variable frequency compressor system and a fixed frequency compressor system, and by switching between fixed and variable frequencies or loading and unloading, combined with the control of dry and wet bulb temperature probes and fresh air valves, the temperature of the drying oven can be stably regulated, and the heat discharged from the drying oven can be recovered to improve the performance of the refrigeration system.

Benefits of technology

This achieved stable temperature in the curing barn, improved the quality of tobacco curing, reduced temperature fluctuations, and increased the efficiency of the refrigeration system.

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  • Figure CN115886302B_ABST
    Figure CN115886302B_ABST
Patent Text Reader

Abstract

The embodiment of the application provides a heat pump drying device and a control method, and relates to the technical field of heat pumps. The indoor unit part of the heat pump drying device comprises an indoor fan, a condenser, a fresh air valve and a moisture removal check valve. The indoor fan and the condenser are matched and installed in a preset closed compartment. The preset closed compartment is connected with a tobacco curing barn, and the fresh air valve is arranged in the preset closed compartment. The outdoor unit part comprises a compressor, a four-way valve, an expansion throttle valve, an evaporator and an outdoor fan. The outlet of the compressor, the four-way valve, the condenser, the expansion throttle valve, the evaporator, the four-way valve and the inlet of the compressor are sequentially connected. The outdoor fan is matched and installed with the evaporator. The air inlet side of the outdoor unit part is installed in front of the moisture removal check valve. When the hot and humid air in the tobacco curing barn passes through the moisture removal check valve, the hot and humid air enters the outdoor unit part for heat exchange. The heat pump drying device can guarantee stable curing barn temperature and improve the curing quality of tobacco.
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