Cold Room Doors

Cold Room Doors

Cold room doors are an important part of cold rooms and freezer rooms,whose construction is reduced due to insulation and operating costs. Usually, there is a wide range of choices for cold room doors during the process of structural design of the cold rooms.

Doors for Cold Rooms

The main function of the cold room door is the thermal insulation of the doorway through which the products are loaded and unloaded. Therefore, the structure and hardware of the door should not have the "thermal bridges", and even if it exists, it should be reduced to a minimum. Cold room doors must be able to withstand the temperature conditions and workloads inside the cold room. Therefore, when choosing a door, it is very important to choose the correct door type and its technical characteristics (dimensions, thickness of insulation, etc.).

Types of Doors for Cold Rooms

According to the operating conditions and loading and unloading operations of the cold rooms, the following types of doors are generally used:

1. Swing doors: Swing doors are making single- or double-leafed, depending on the size of the doorway. Generally, single-leaf doors are used for doorways up to 1.2 m; double-leaf doors are usually used for larger-sized doorways. Depending on the size (height of the doorway), the door panel is fixed on two or more hinges. The door is called "right" or "left", depending on the location of the hinges and opens to the corresponding side. The advantages of the swing door are easy to install and low in price.

2. Sliding door: The panel of the sliding door moves along the guide (slide-rail) on the rollers. When the gate is closed, they are tightly pressed under their weight and the actions of clamping rollers, so as to provide a good sealing condition for the gate. In addition to manual opening, automatic electric drives can also be used for sliding doors, which can be activated by remote consoles, radar, photocells, magnetic rloops and a remote control.

The main advantages of sliding doors:

Higher reliability and durability - it is a very important requirement with intensive using;

There is no "dead zone" before entering - it is very convenient to use in confined spaces and corridors;

The clamping device and seal. Due to the structure of guide rails and special pressure rollers, the door is automatically sealed  under the weight of the door itself;

Possibility of using for the large doorways.

3.Vertical gate of guillotine type: When there is no space available to open the sliding door, the panel of this type of door will rise. Such doors are usually powered by electricity because they are difficult to open manually. Disadvantages of refrigeration vertical gates are: the worst tightness and higher price compared to collapsible gates.

Medium and Low Temperature Doors

There are also differences between the swing door and the sliding door of the cold room according to the temperature conditions:

Medium temperature mode door of cold room (from 0℃ and above);

Low temperature mode door of cold room (from -15℃ to -25℃ and below).

The main difference between medium and low temperature doors is the insulation thickness of the panel used in the cold room door. The insulation thickness of the panel depends on the specific use, and can be between 60 and 160 mm. The standard thickness of medium temperature cold room is 60-80 mm, and the standard thickness of low temperature cold room is 100-120 mm. In the chambers of shock freezing of products (-30-40°C) and warehouses with large doorways, there must be cold storage doors with a heat-insulating thickness of 140-160 mm. Low temperature doors must be equipped with built-in overheating cables to prevent the freezing of panel to the door frame. In addition, due to the need to destroy the "thermal bridges" of the low temperature door, the structure of the door frame and handle may be different, which can be neglected in the medium-temperature mode.

Options and Special Design of Doors

Many manufacturers offer door trims made of stainless steel, non-ferrous metal or metal with an additional polymer coating (PVC, polyester), or buffers made of metal or plastic sheets to protect the door structure. Furthermore, it is possible to equip the door with the viewing windows, to equip it with different types of handles, locks, pressure equalization valves and to protect the area of the doorway with various types of special buffer bumpers. Doors in specific configurations are produced for special situations, for example meat processing plants and slaughter shops require doors with doorways, and controlled atmosphere chambers are mainly used for storing fruits and vegetables, so hermetic sliding gates are used.

Which Refrigeration Doors to Choose?

Doors for a concrete doorway are determined based on size, space constraints and conditions of use. General recommendations:

For small doorways, the use of swing doors can facilitate the passage of people;

Sliding doors are suitable for large doorways and situations where sealing operations are required;

Vertical doors are the best choice when other types of doors cannot be installed

Products from different manufacturers may vary in quality and price because the quality of the product affects the price. The main factors affecting product quality are the strengths or weaknesses of the design, the quality of the accessories (hinges, handles, locks, etc.), and the culture of production.

When choosing a cold room door, it is best to consult an experienced supplier. Xiamen Jialiang is an expert in designing and installing cold room according to your requirements. Our extensive industry knowledge and experience means you can trust our team for your cold room building! If you want to know more information, please consult us www.coldroomchina.com