Large cold storage door

Main features

Large cold storage doors are essential insulation and sealing equipment in cold chain warehousing logistics, food processing plants, and pharmaceutical cold storage. Because of the big temperature difference inside and outside the warehouse and the frequent movement of vehicles (like forklifts and pallet trucks), large cold storage doors usually use high-density polyurethane (PU/PIR) rigid foam core, paired with double-sided sandwich structures, to achieve excellent thermal insulation and airtightness.

Currently, mainstream large cold storage doors are mainly divided into the following core types. You can choose based on your application scenario and logistics frequency:

• Electric/Manual Sliding Cold Storage Doors

• Features: The most commonly used type of door for large cold storage. The door panel slides horizontally along the side wall without taking up front or back operation space. Usually equipped with floating aluminum alloy guide rails that close with their own weight, ensuring excellent sealing.

• Suitable for: Main aisles with frequent forklift traffic and high cargo throughput. Sizes can usually be customized up to 4m×4m or even larger.

• Sectional Overhead Cold Storage Doors

• Features: The door is divided into sections that lift along tracks. When fully open, it sits under the ceiling inside the warehouse, maximizing wall space on both sides.

• Suitable for: Cold chain logistics docks, loading/unloading platforms, or areas with narrow walls where sliding doors cannot be installed.

• High-Speed Cold Storage Doors

• Features: Opening speeds typically reach 1.5m/s to 2.5m/s. Usually feature a zipper-like soft bottom or thick insulated soft curtain with automated collision reset function. They minimize the time the door is open, preventing cold air leakage and frost buildup.

• Suitable for: Locations with extreme temperature differences between inside and outside the warehouse, and very busy passageways where people and vehicles move frequently, at the junction of normal and low temperatures.

1. Built-in escape device (emergency internal lock opening): No matter if the cold storage door is locked electrically or manually, people inside can turn the internal escape handle to force the door open, preventing anyone from being accidentally locked in the cold environment.

2. Door frame anti-freeze heating wire: For low-temperature cold storage (below 0°C), the door frame must have low-voltage anti-dew heating cables embedded around it to prevent the door from freezing and sticking to the frame when exposed to hot and cold air, which could make the door hard to open or tear the sealing strip.

3. Collision and rebound protection (electric doors): The bottom of the door should have safety airbags, infrared photoelectric sensors, or radar detection so that if it encounters a person or forklift while closing, the door can automatically stop or reopen in reverse, avoiding accidents.

4. Interlock and linkage system: The door can be linked with an air curtain or fast-rolling door outside. Once the sliding door opens, the air curtain starts automatically to block as much warm air as possible from entering the cold storage.

• Electric/Manual Sliding Cold Storage Doors

• Features: The most commonly used doors for large cold storage rooms. The door panels slide horizontally along the side walls, taking up no front or rear operating space. Usually equipped with floating open and self-closing aluminum tracks; when closed, the door seals tightly against the frame by its own weight, offering excellent insulation.

• Suitable for: Main aisles with frequent forklift traffic or high cargo throughput. Sizes can usually be customized up to 4m×4m or even larger.

• Sectional Overhead Cold Storage Doors

• Features: The door is divided into sections that lift upward along tracks. When fully open, it rests under the ceiling inside the storage, maximizing wall space on both sides.

• Suitable for: Cold chain logistics loading docks, freight handling areas, or places where the side walls are too narrow to install sliding doors.

• High-Speed Cold Storage Doors

• Features: Opening speed usually ranges from 1.5m/s to 2.5m/s. They typically use zipper-type soft bottom edges or thick insulated curtains, with auto-reset collision protection. They minimize the door open time, preventing large-scale cold air leakage and frost buildup.

• Suitable for: Areas with large temperature differences between the inside and outside, and extremely busy human and vehicle traffic at the junction of normal and low-temperature zones.