The overall structural characteristics and performance of the tunnel quick-freezer: Overall design 1. The whole equipment is designed and manufactured in compliance with HACCP and the new version of food and drug GMP, SC and other requirements; in line with the People's Republic of China "Food Monomer Quick Freezing Device" standards and commodity inspection export requirements. 2. The internal and external structures of the warehouse are all made of food-grade stainless steel SUS304, all of which are argon arc welding, and the weld joint is pickled. (Except for standard parts and special parts such as reducers and motors). 3. Design process structure parameters according to the characteristics of quick freezing of frozen products. The evaporator is designed with a large effective surface area; the large-pitch aluminum alloy finned tube group is adopted, and the variable-pitch design is adopted to reduce the temperature difference between the evaporator and the warehouse. The design selection is based on the evaporating temperature. -42 degrees Celsius calculation. Sufficient evaporation area, high heat exchange efficiency, full consideration of the influence of incoming and outgoing temperature, the design makes frosting lag behind, and prolongs the working time of the quick-freezer. 4. The evaporator is equipped with a high-efficiency, low-noise, waterproof, moisture-proof and low-temperature axial flow fan. 5. The temperature of the product is reduced to -18°C by using the temperature inside the warehouse at -35°C and the principle of tunnel side blowing and the frequency conversion conveyor belt. 6. The organic combination of evaporator, fan, air guide device and vibration device forms a uniform and stable frozen product suspension and a negative feedback fluidized bed with multi-directional monomer wind, which makes the frozen product monomer freeze more quickly and quality Unite; 7. The external centralized water valve is used to control the uniform water frosting to prevent bacteria from multiplying, clean and hygienic, and meet the food hygiene requirements. The evaporator in the quick-freezing room is equipped with an integrally welded stainless steel large water tray; the warehouse body is equipped with an overhaul door with electric heating, and all corners of the quick-freezing machine are easy to clean and maintain; except for the slow running of the mesh belt, other transmission devices are in the heat preservation cover, and the cover is easy Disassembly and assembly; an emergency stop safety button and safety warning signs are set; the quick-freezing machine is equipped with an adjustable device that moves up and down horizontally. 8. The feed inlet is equipped with an adjustable wind-shielding and heat-preservation device with an adjustable height limit to uniformly distribute the product and avoid the loss of cold energy. The air guide adjusting device can adjust the wind direction and control the uniformity of the cold air; 9. The stainless steel SUS304 conveyor belt chain adopts a 38.1mm double-pitch large roller chain for rolling transmission to avoid deformation and breakage of the chain; 10. The return belt of the mesh belt conveyor is in the warehouse. The five sides of the incoming bar are insulated. An adjustable stainless steel wind shield is attached to the cargo port. The six sides of the outgoing bar are insulated, which can realize automatic blanking and keep the mesh belt conveyed at low temperature. Operation, with pre-cooling effect. 11. Adopt full-length stainless steel sidewalls, and the frozen products are relatively closed inside the transmission tunnel, preventing the frozen products from turning over and blowing out of the tunnel. 12. High-quality cycloid pinwheel reducer and frequency converter realize stepless speed regulation of mesh belt transmission. The quick freezing time can be adjusted arbitrarily. 13. Adequate storage surface area, effective use of refrigeration capacity, suitable for quick-freezing processing of different frozen products, high efficiency and energy saving. Insulation structure of library body: 1. Warehouse body: The warehouse body is produced, manufactured, installed and inspected according to the standards of "Indoor Assembled Cold Storage" (ZBX99003-86) and "Insulation Sandwich Panel for Combined Cold Storage" JB/T6527-2006. The library board adopts double-sided stainless steel self-extinguishing flame-retardant polyurethane sandwich insulation board, and the panel adopts SUS316 stainless steel board. The thickness is 150 mm. The inspection door is equipped with a double-stranded double door sash, low-temperature, aging, and oil-resistant sealing double rubber strips; The insulation material in the board adopts self-extinguishing flame-retardant rigid polyurethane which meets the following indicators: 1. The bulk density requirement is ≥42kg/m3 (the average bulk density of the non-whole board is the bulk density of random cuts); the thermal conductivity ≤0.024w/m.k; 2. Compressive strength requirements: 150～200kpa for wall and roof, and ≥300kpa for ground; 3. Water absorption rate ≤4%; dimensional stability ＜1% (-30℃, 48h); self-extinguishing property ≤7 seconds. 4. The bonding between the stainless steel plate and the polyurethane is firm, the bonding force between the two should be greater than 98.1N/cm2, and the integral foaming type is adopted. The library board adopts the eccentric hook connection method, the joints are joined with four glues, and the craft openings and corner joints are foamed tank seams. The library body adopts ultra-thick polyurethane insulation board; ultra-thick 304 stainless steel anti-collision outer board; Mechanical transmission: 1. The conveyor belt chain net is made of food-grade bright SUS304 spring stainless steel, the net surface is flat, the chain pieces and the shaft are connected and run flexibly, and the large roller conveyor chain net rolls for transmission; 2. The friction part of the mesh belt and the guide rail slide is made of ultra-high polymer wear-resistant polyethylene material, which does not drop chips and ensures the safety of frozen products; 3. The feed port platform is equipped with a material ultra-high and over-limit device, an adjustable stainless steel wind shield and heat preservation device; the discharge port platform is equipped with automatic blanking. 4. The transmission drive adopts a frequency conversion reducer, and the mesh belt runs frequency conversion speed regulation, and the quick freezing time can be adjusted arbitrarily. Evaporator and defrost: 1. The evaporator is designed and selected according to the liquid supply evaporation temperature -42℃. 2. The evaporator adopts high-efficiency variable-pitch aluminum fin aluminum tube treated with surface oxidation and rust prevention to ensure uniform frosting and unobstructed airflow. The bracket air plate shell is made of stainless steel. 3. Equipped with a high-efficiency, energy-saving and low-noise vortex fan, the air duct is stainless steel, the fan blade is rust-proof aluminum alloy, and the motor is a fully enclosed low-temperature, moisture-proof and waterproof motor, which runs smoothly. Electronic control part: 1. Electric control system: The electric control cabinet is made of stainless steel SUS304; the electrical components have passed the national quality certification. The protection level of all motors and external electrical components of the power distribution cabinet is not less than IP55, and the motor adopts Y2 waterproof and moisture-proof motors. The stainless steel electric control cabinet has a beautiful and firm appearance and structure, and the door opening angle is greater than or equal to 90°. The components are arranged neatly and installed firmly. Insulation resistance ≥2MΩ, three-phase five-wire withstand voltage AC380V/50Hz. Display the internal temperature, transmission frequency, fan start and stop, set variable frequency speed regulation, operate start and stop button, emergency stop button, standby cold source start and stop button and door heating start and stop button. The main control electrical components mainly adopt well-known brands such as Siemens and Schneider.