Heat pump drying and dehumidifying all-in-one machine

Abstract

The invention provides a heat pump drying and dehumidifying all-in-one machine, and belongs to the technical field of drying. The machine solves the problems that an existing heat pump drying machine is low in dehumidifying efficiency, the dehumidifying process is not controllable, and effective dehumidifying cannot be ensured. The all-in-one machine comprises a machine body, a compressor, heat exchangers and a control valve set, wherein the compressor, the heat exchangers and the control valve set are arranged in the machine body, an inner circulation air way and an outer circulation air way are arranged in the machine body, the multiple heat exchangers are divided into two sets, the two sets of heat exchangers can carry out heat exchange with air in the inner circulation air way and the outer circulation air way, air passes through the inner circulation air way to achieve heating, refrigeration or dehumidifying, and the heat exchangers corresponding to the outer circulation air way can recycle outdoor air waste heat discharged out of a room so as to preheat air entering the room from the outdoor position. The all-in-one machine has the beneficial effects that the function is complete, the work efficiency is high, and the dehumidifying effect is good.

Description

Technical field [0001] The invention belongs to the technical field of drying, and relates to heat pump drying, in particular to a heat pump drying and dehumidifying integrated machine. Background technique [0002] Some existing agricultural and sideline products, medicinal materials, tobacco, wood, etc. need to be dried. There are many types of drying equipment, and a heat pump dryer is one of them. The heat pump dryer is a heat lifting device. The high temperature heat pump dryer uses the reverse Carnot principle to absorb heat from the surrounding environment and transfer it to the object to be heated. Its working principle is the same as that of a refrigerator. The work in reverse Carnot cycle, the difference is that the operating temperature range is different. [0003] Since a large amount of humid air is generated in the drying room during the drying process, the humid air contains a large amount of water vapor. If the water vapor cannot be removed, the desired drying effe...

AI Technical Summary

Problems solved by technology

The amount of air that can exchange heat with the dehumidifying evaporator per unit time and reach a temperature lower than the dew point is determined by the effective cooling capacity of the evaporator and the temperature of the humid air, and the effective cooling capacity of the dehumidifying evaporator is based on its design. Depending on the structure, under the condition that the temperature of the humid air remains constant, when more than the specified amount of humid air exchanges heat with the evaporator, the effective cooling capacity of the evaporator cannot reduce the temperature of the humid air to below the dew point temperature, so that it cannot Realize dehumidification; and because the temperature of humid air in reality is constantly changing, the specified air volume that can reach the dew point temperature per unit time also changes accordingly, and the existing heat pump dryer system cannot effectively control the corresponding air volume in real time , it is likely that excessive humid air will exchange heat with the evaporator, so the dehumidification effect cannot be effectively guaranteed

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