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Drying device suitable for food and food drying method thereof

A drying device and food technology, applied in the fields of food preservation, application, food science, etc., can solve the problems of temperature and humidity that cannot be adjusted in the drying process, and achieve the effects of controllable drying quality, good temperature and humidity uniformity, and quality assurance

Inactive Publication Date: 2013-01-16
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only adjust the drying time according to the weight and humidity of the item, and cannot adjust the parameters such as temperature and humidity in the drying process according to the drying degree and drying speed of the item.

Method used

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  • Drying device suitable for food and food drying method thereof
  • Drying device suitable for food and food drying method thereof
  • Drying device suitable for food and food drying method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Depend on Figure 1-Figure 2 As shown, the applicant has designed a drying device suitable for food, which includes a drying chamber (200), a wheel dehumidification system (300), a refrigeration system (400), a heater (500), a humidifier (600), Circulating air supply system (700), main air path (800) and control system (900);

[0054] The drying chamber (200), the refrigeration system evaporator (422), the heater (500), the humidifier (600), and the circulating air supply system (700) are sequentially connected through air ducts to form a main air path (800);

[0055] The runner dehumidification system (300) is connected in parallel with the main air path (800);

[0056] The circulating air supply system (700) includes a circulating fan (710) and a frequency converter (720), and the circulating fan is connected to the frequency converter in sequence.

[0057] Described drying chamber (200) comprises casing (210), weighing tray (220) and weighing tray support (230);

...

Embodiment 2

[0073] Utilize the method for dry food of device described in embodiment 1, its steps are as follows:

[0074] (1) Place the food to be dried in the drying room;

[0075] (2) Set the reference temperature, relative humidity, wind speed, initial moisture content of the material and product moisture content in the drying process;

[0076] (3) Real-time detection of weight, temperature, relative humidity, and wind speed, calculation of water content, and drawing of drying curves, drying speed curves, temperature and humidity, and wind speed response curves;

[0077] (4) According to the characteristics of the drying curve and drying speed curve, adjust the drying room temperature, relative humidity and wind speed;

[0078] (5) compare the actual moisture content with the moisture content of the product, and determine whether to end the drying process by the controller (920);

[0079] (6) Use the temperature and humidity sensor (931) to detect the actual temperature and relative...

Embodiment 3

[0092] Embodiment 3 (application embodiment):

[0093] 1. No-load test

[0094] The device of the embodiment was used to conduct a no-load test, and the temperature and humidity response curve of the device was tested under the no-load condition. Figure 4 It is a high temperature and high humidity test, the temperature and humidity response curve when the temperature is set at 80°C and the relative humidity is set at 70%. Figure 5 It is a low temperature and low humidity test, the temperature and humidity response curve when the temperature is set at 5°C and the relative humidity is set at 20%. Figure 6 is the response curve when the wind speed is set to 2m / s. Table 1 is the control performance analysis under different temperature and humidity.

[0095] Table 1 Performance analysis of control under different temperature and humidity

[0096]

[0097] 2. Material drying test

[0098] This device is used for material drying test, and the material is Li bean pods.

[...

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PUM

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Abstract

The invention belongs to a drying device suitable for food. The device comprises a drying chamber, a rotating wheel dehumidification system, a refrigerating system, a heater, a humidifier, a circulating air supply system, a main air path and a control system. The drying chamber, a refrigerating system evaporator, the heater, the humidifier, and a circulating fan are connected by air pipes in order so as to form the main air path. The rotating wheel dehumidification system and the main air path are in parallel connection. A food drying method of the drying device provided in the invention consists of: according to a drying curve and a drying rate curve, adjusting the drying chamber temperature, the relative humidity and the air speed, and comparing an actual water content with a product water content to determine whether ending the drying process. Heating dehumidification, evaporator dewing dehumidification, and adsorbing dehumidification by a rotating wheel dehumidifier are employed to realize drying chamber humidity control. The device has the characteristics of wide temperature and humidity control range, good uniformity, and adjustable air speed, can monitor the weight of a dried material in real time, control the drying process, lower energy consumption, and can be used for drying fruits and vegetables, spices, fish, meat, egg products, gel products or / and cereals.

Description

technical field [0001] The invention specifically relates to a device suitable for drying food and a method for drying food thereof. It is suitable for drying various fruits and vegetables, spices, fish, meat, egg products, gel products or / and grains. Background technique [0002] Hot air drying is widely used in chemical industry, food, light industry, textile, coal, agricultural and forestry product processing and building materials and other fields. The development of drying equipment in our country is relatively late, mainly from the introduction of dryers imitated from Japan, the former Soviet Union and other countries. Up to now, great breakthroughs have been made. For example, Chinese Patent Publication No. CN201365487Y introduces a multi-stage dryer with controllable temperature and humidity, which uses a heater and a humidifier to control temperature and humidity. Patent Publication No. CN101191697A introduces a low-temperature drying system device, which uses aux...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L3/40
Inventor 黄汉英赵思明熊善柏王观胡月来洪苑乾
Owner HUAZHONG AGRI UNIV
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