Intermittent cooling heat pump drying device and method

A heat pump drying and drying equipment technology, applied in lighting and heating equipment, heating to dry solid materials, drying solid materials, etc., can solve the problems of moisture gradient and internal stress, different moisture diffusion rates, etc. Cost saving and drying rate increase effect

Active Publication Date: 2015-10-28
ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an intermittent cooling heat pump drying equipment and method to solve the problems of large moisture gradient and internal stress caused by different moisture diffusion rates inside and outside the materials during the drying process of agricultural products, and to meet the requirements for improving drying in the drying process of agricultural products. Speed ​​and drying quality requirements

Method used

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  • Intermittent cooling heat pump drying device and method

Examples

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Effect test

Embodiment 1

[0018] Honeysuckle is dried using intermittent cooling heat pump drying equipment and method. The details are as follows: ① pick the fresh honeysuckle and carry out pretreatment, and then load it into the heat pump drying equipment to prepare for drying; ② start the heat pump drying equipment, and the ambient air enters the heat pump external unit (9) through the air inlet (10), and is absorbed by the heat pump external unit. (9) After absorbing the heat, it turns into cold air and enters the exhaust pipe (3), and is discharged into the environment through the exhaust port (1) under the control of the control valve (2), and at the same time, the heat of the ambient air is absorbed by the heat pump external unit (9) Finally, it is transferred to the heat pump internal unit (8) placed inside the drying chamber (6) through the pipeline to heat the material, raising the drying temperature to 45°C, and the drying time lasts for about 3 hours; ③ Change the control mode, the ambient a...

Embodiment 2

[0020]Chrysanthemums are dried using intermittent cooling heat pump drying equipment and methods. The details are as follows: ① Pick fresh chrysanthemums and carry out pretreatment, then put them into the heat pump drying equipment and prepare for drying; (9) After absorbing the heat, it turns into cold air and enters the exhaust pipe (3), and is discharged into the environment through the exhaust port (1) under the control of the control valve (2), and at the same time, the heat of the ambient air is absorbed by the heat pump external unit (9) Finally, it is transferred to the heat pump internal unit (8) placed inside the drying chamber (6) through the pipeline to heat the material, raising the drying temperature to 40°C, and the drying time lasts for about 2 hours; ③Change the control mode, the ambient air It enters the heat pump external unit (9) from the air inlet (10), and after being absorbed by the heat pump external unit (9), it turns into cold air and enters the exhau...

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Abstract

The invention discloses an intermittent cooling heat pump drying device and method which are particularly suitable for drying fruits and vegetables, and belongs to the field of agricultural products. According to the method, during drying operation, drying temperature continuously rises and drops, and intermittent cooling drying is formed during corresponding lasting time. Cold capacity generated when the heat pump drying device runs is introduced into a dying chamber and is used for cooling materials, and serves as an achievement means of the intermittent cooling drying method. By means of the intermittent cooling heat pump drying device and method, the outward-diffusion rate of water in the materials can be effectively increased; the drying speed can be effectively increased; the drying quality is improved; and meanwhile the using efficiency of the heat pump drying device is improved.

Description

technical field [0001] The invention discloses an intermittent cooling heat pump drying device and method, which are mainly used in the drying treatment of agricultural products, especially for drying fruit and vegetable materials, and belong to the field of agricultural product processing. Background technique [0002] During the drying process of agricultural products, the moisture on the surface of the material evaporates quickly, and the moisture inside the material gradually diffuses to the outside. When the internal moisture diffusion rate is closer to the material surface moisture evaporation rate, the drying rate is higher and the drying quality is better. Otherwise, the drying rate may be low, and in severe cases, crusting on the surface of the material may occur, which will affect the subsequent drying process and drying quality. For example, the rice will burst when it is dried. [0003] At present, the multi-stage slow drying method, pulsating fluidized bed dryi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B9/06F26B21/00F26B3/02
Inventor 娄正师建芳刘清赵玉强冯玮邵广
Owner ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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