Integrated commercial food vacuum freeze dryer

Abstract

The utility model discloses an integrated commercial food vacuum freeze dryer which comprises a top pre-freezing bin, a middle drying bin and a bottom cold trap bin. The pre-freezing bin is provided with a quick-cooling system composed of a double-spiral evaporator and an axial flow fan, and quick freezing of food is achieved. The drying bin is provided with multiple layers of liftable shelves, each shelf is of a three-layer composite structure composed of a stainless steel base plate, a graphene heating film and a fluororesin protective layer, and heating uniformity and anti-corrosion performance are both achieved; the cold trap bin is provided with a double-V-shaped aluminum alloy condensation face, the surface is subjected to anodic oxidation treatment, and the frosting efficiency is improved. The whole machine adopts a stainless steel double-layer shell and is filled with a thermal insulation material, a PLC (Programmable Logic Controller) intelligent control system is matched, and the whole-process accurate regulation and control is realized through a capacitive vacuum gauge, a thermometer and an infrared moisture sensor. Through structural integration and functional modularization design, the problems that a traditional freeze dryer is large in occupied area, high in energy consumption, low in drying efficiency and the like are solved, and the freeze dryer is suitable for large-scale industrial freeze-drying production of various foods.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of integrated commercial food vacuum freeze-drying machine. BACKGROUND

[0002] Vacuum freeze-drying technology is widely used in food, medicine and biological products preservation and long-term storage. Traditional vacuum freeze-drying machine usually consists of pre-freezing, drying and condensing and other basic units. These devices can remove moisture from the material in a low-temperature, low-pressure environment, which can maximize the preservation of nutrients, taste and form. However, the existing commercial food vacuum freeze-drying machine has the problems of complex structure, inconvenient operation and low energy efficiency, which leads to low efficiency in large-scale production and high equipment maintenance cost.

[0003] The commercial food vacuum freeze-drying machine on the current market mostly uses single material and freezing method, lacks efficient temperature and humidity control system, often leading to unstable quality of freeze-dried food. In addition, many existing devices do not fully consider the temperature uniformity and energy utilization efficiency in the food processing process, which affects the stability and production efficiency of the product. Therefore, how to improve the integration, intelligence and energy-saving performance of the freeze-drying machine has become the key to improving the quality and production efficiency of food freeze-drying. SUMMARY

[0004] The utility model aims at solving the above prior art deficiencies, providing a kind of integrated commercial food vacuum freeze-drying machine convenient to connect.

[0005] An integrated commercial food vacuum freeze-drying machine, comprising a composite bin body, the composite bin body includes a sealed bin cover, the composite bin body is connected with a vacuum pump group, the top of the composite bin body is a pre-freezing bin, the middle part is a drying bin, and the bottom is a cold trap bin. The pre-freezing bin, drying bin and cold trap bin are vertically arranged. The pre-freezing bin is provided with a rapid cooling system at the top. The drying bin is provided with a plurality of layers of liftable shelves. The spacing between the shelves can be adjusted. The shelves are a three-layer composite structure. The three-layer composite structure comprises a stainless steel base plate, a graphene heating film and a fluororesin protective layer. The cold trap bin is provided with a double-V-shaped condensing surface.

[0006] As a further improvement, the composite bin body is made of a stainless steel double-layer shell, and a thermal insulation layer is filled in the middle of the double-layer shell. The double-layer stainless steel shell + thermal insulation layer reduces heat loss and eliminates condensation on the outer surface.

[0007] As a further improvement, the rapid cooling system comprises a double-spiral evaporator and an axial flow fan. The double-spiral evaporator has higher heat exchange efficiency than traditional coil pipes, and the axial flow fan has low noise.

[0008] As a further improvement, the liftable structure of the shelf includes a linear rail and a slider, and the liftable structure is adjusted by electricity or manually. The linear rail and slider structure has high positioning accuracy, and the manual / electric dual mode ensures emergency operation in case of power failure.

[0009] As a further improvement, the material of the V-shaped condensing surface is aluminum alloy, and the surface of the condensing surface is anodized. The surface hardness of the anodized aluminum alloy reaches HV800, and the corrosion resistance life exceeds 10 years.

[0010] As a further improvement, an intelligent control system is included, which includes a PLC controller, a capacitive vacuum gauge, a thermometer, and an infrared moisture sensor arranged in the composite bin body. The PLC linkage of multiple sensors improves the temperature control accuracy and shortens the moisture detection response time.

[0011] Advantages:

[0012] 1. Multi-bin layout to improve drying efficiency: The composite bin body includes a pre-freezing bin, a drying bin, and a cold trap bin, which are vertically arranged to optimize the material processing process and improve the drying efficiency. The effective combination of the pre-freezing bin and the cold trap bin not only ensures the rapid freezing and condensation process of the food, but also ensures the uniformity of temperature control and moisture removal during the drying process.

[0013] 2. High-efficiency rapid cooling system: By using a double-spiral evaporator and an axial flow fan, the cooling speed during the pre-freezing process of the food is greatly improved, the freezing time is reduced, and the nutritional ingredients and taste of the food are locked.

[0014] 3. Adjustable shelf structure to increase operational flexibility: The drying bin is provided with liftable shelves, and the distance between the shelves can be adjusted, which provides greater operational flexibility for materials of different sizes and thicknesses, and also helps to improve the uniformity of the materials during the drying process.

[0015] 4. Excellent heat preservation performance: The composite bin body adopts a stainless steel double-layer shell, and a heat preservation layer is filled in the middle of the double-layer shell, which effectively reduces heat loss, improves energy utilization efficiency, and reduces energy consumption of the equipment.

[0016] 5. Intelligent control system to improve operational convenience and accuracy: The integrated intelligent control system includes a PLC controller, a capacitive vacuum gauge, a thermometer, and an infrared moisture sensor, which can accurately monitor the working state of the equipment and the freeze-drying process of the food, realize precise control, and further improve product quality and production efficiency.

[0017] 6. Durable and efficient condensing surface: The V-shaped condensing surface is made of aluminum alloy and is anodized, which improves corrosion resistance and heat transfer efficiency, and prolongs the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is the internal structure diagram of the composite bin body;

[0019] Fig. 2 is the front view of the composite bin body;

[0020] 1. composite bin body 2. pre-freezing bin 3. drying bin 4. cold trap bin 5. rapid cooling system 6. shelf 7. V-shaped condensing surface 8. thermal insulation layer 9. linear rail 10. sliding block. DETAILED DESCRIPTION

[0021] In order to deepen the understanding of the utility model, the utility model will be further described in the following combined with examples and drawings, the examples are only used to explain the utility model, and do not constitute the limitation to the protection scope of the utility model.

[0022] As Figs. 1-2 shown, an integrated commercial food vacuum freeze-drying machine includes a composite bin body 1, a pre-freezing bin 2, a drying bin 3, a cold trap bin 4, a rapid cooling system 5, a shelf 6, a V-shaped condensing surface 7, a thermal insulation layer 8, a linear rail 9 and a sliding block 10.

[0023] An integrated commercial food vacuum freeze-drying machine includes a composite bin body 1 and an intelligent control system, the composite bin body 1 adopts a stainless steel double-layer shell, the double-layer shell is filled with a thermal insulation layer 8 in the middle, the double-layer stainless steel shell + thermal insulation layer reduces heat loss, and there is no condensation on the outer surface, the composite bin body 1 includes a sealed bin cover, the composite bin body 1 is connected with a vacuum pump group, the top of the composite bin body 1 is the pre-freezing bin 2, the middle is the drying bin 3, and the bottom is the cold trap bin 4, the pre-freezing bin 2, the drying bin 3 and the cold trap bin 4 are vertically arranged, the pre-freezing bin 2 is provided with the rapid cooling system 5 at the top, the rapid cooling system 5 includes a double-spiral evaporator and an axial flow fan, the double-spiral evaporator has higher heat exchange efficiency than a traditional coil pipe, and the axial flow fan has low noise, a plurality of layers of liftable shelves 6 are arranged at the position of the drying bin 3, the spacing between the shelves 6 can be adjusted, the liftable structure of the shelf 6 includes a linear rail 9 and a sliding block 10, the liftable structure is adjusted by electricity or manually, the linear rail 9 and the sliding block 10 have high positioning accuracy, manual / electric dual mode ensures emergency operation in case of power failure, the shelf 6 has a three-layer composite structure, the three-layer composite structure includes a stainless steel base plate, a graphene heating film and a fluororesin protective layer, the cold trap bin 4 is provided with double-V-shaped condensing surfaces 7, the material of the V-shaped condensing surface 7 is aluminum alloy, the condensing surface is anodized, the surface hardness of the anodized aluminum alloy reaches HV800, and the corrosion resistance life exceeds 10 years, and the intelligent control system includes a PLC controller, a capacitive vacuum gauge, a thermometer and an infrared moisture sensor arranged in the composite bin body 1, the PLC linkage multi-sensor improves temperature control accuracy, and moisture detection response time is short.

[0024] A working process of an integrated commercial food vacuum freeze dryer:

[0025] (1) pre-freezing stage: the material is laid flat on the shelf 6, the double-helix evaporator is linked with the axial flow fan, and the rapid freezing from 25 DEG C to -35 DEG C is completed within 30 minutes;

[0026] (2) vacuum extraction stage: the vacuum pump set is started, and the pressure in the drying chamber 3 is reduced to 10 Pa within 10 minutes;

[0027] (3) primary drying: the shelf 6 is heated to 50 DEG C, the graphene heating film is heated at a power of 800 W / m 2 for 18 hours;

[0028] (4) secondary drying: the shelf 6 is automatically adjusted to 65 DEG C by the PLC according to the infrared sensor data, and the process is terminated when the moisture content is less than or equal to 3%;

[0029] (5) cold trap operation: the V-shaped condensing surface 7 at -55 DEG C continuously captures water vapor, and the difference in frost layer thickness is less than 5 mm;

[0030] (6) material discharge and cold trap defrosting.

[0031] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An integrated commercial food vacuum freeze-dryer characterized by, The composite warehouse body comprises a sealing warehouse cover, is connected with a vacuum pump group, and has a pre-freezing warehouse at the top, a drying warehouse in the middle, and a cold trap warehouse at the bottom.

2. The integrated commercial food vacuum freeze-dryer according to claim 1, characterized in that, The composite warehouse body adopts a stainless steel double-layer shell, and a heat preservation and insulation layer is filled in the double-layer shell.

3. The integrated commercial food vacuum freeze-dryer according to claim 1, characterized in that, The rapid cooling system comprises a double-spiral evaporator and an axial flow fan.

4. The integrated commercial food vacuum freeze dryer according to claim 1, wherein, The liftable structure of the shelf comprises a wire rail and a sliding block, and is adjusted by electricity or manually.

5. The integrated commercial food vacuum freeze dryer according to claim 1, wherein, The material of the V-shaped condensing surface is aluminum alloy, and the surface is subjected to anodic oxidation treatment.

6. The integrated commercial food vacuum freeze dryer according to claim 1, wherein, The intelligent control system comprises a PLC controller, a capacitive vacuum gauge, a thermometer, and an infrared moisture sensor arranged in the composite warehouse body.

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