Selection and design of cold storage doors

Selection and design of cold storage doors

Under normal circumstances, the cold storage door as one of the cold storage equipment only accounts for less than 10% of the entire system cost. After the entire system is put into use, it has almost become the "front" of the entire system. Every day in and out, you need to open, close and lock the door. The highest frequency can even reach 1000 times per day. If there is a problem during this period, it will cause running and dripping, which will affect the production schedule, and the large will affect the corporate image or even cause a safety accident. Therefore, it is necessary for us to pay enough attention to cold storage doors, and it is urgent for the country to formulate and improve our country's cold storage door standards with reference to the standards of developed countries in Europe and America.

1. Generally, when we select and design, we firstly select the thickness of 120~150mm when the temperature exceeds 60℃ according to the temperature difference between the inside and outside of the warehouse. If the thickness exceeds this thickness, there is no practical significance because the conduction of the sealing strip Heat dissipation is the main factor in the loss of cold capacity. MTH's approach is to add a second sealing strip, which can prevent the loss of cold air.

2. The material of the panel mainly includes sprayed color steel plate, stainless steel, glass fiber reinforced plastic, ABS, PE, aluminum plate, etc. The choice of panel material is mainly based on the environment of use, and the general environment spraying color steel plate (the quality of the color steel plate must pass) can meet the requirements. Stainless steel and other materials are mainly used in food factories, seafood, or other corrosive environments. ABS, PE, and FRP are emerging materials in recent years, which have the advantages of corrosion resistance, collision resistance and light weight.

　　3. The door frame is a key factor of the cold storage door, and its quality directly affects the insulation effect of the cold storage door. The standard practice of MTH is the all-inclusive method of PVC profiles (other materials can be outsourced), which enhances heat preservation on the one hand, and also strengthens the load-bearing capacity of door frames and guide rails on the other. In a low temperature environment, the thickness of the side door frame insulation should exceed 100mm. The door frame should be made of poor thermal conductors such as PVC, FRP and other materials should be the first choice.

4. When selecting and designing, we should consider the opening direction of the door, the size of the net door opening, the style of the threshold, etc., and leave enough insulation thickness according to the net door opening size to further calculate the reserved door opening for civil engineering and pre-bury it according to a certain size Pieces. The best way is for cold storage door manufacturers to participate in the design, so as to avoid many cross-cutting problems and hidden dangers in the later period.

5. Safety performance is always our top priority in production. According to EU standards, the cold storage door must have a qualified escape function, that is, after the cold storage door is locked, people can easily open the lock to escape and cannot require additional tools or produce Other problems such as cold leakage, our domestic locks often have the problem of freezing and cold leakage after escape. There are at least two safety anti-crowding protections for electric systems, which most of our domestic systems do not have.

In short, when we choose the cold storage door and its surrounding facilities, we should focus on the following factors: the temperature difference determines the thickness, the largest equipment in and out determines the net door opening size (generally, each side should exceed the maximum equipment size 150~400mm), necessary The strength support determines the form of the door frame, the environment determines the material, the standardization of the worker’s operation determines the necessary anti-collision measures, the necessary safety escape functions, the anti-pinch and anti-collision functions that need to be considered as much as possible, and other things that need to be considered in accordance with the use requirements, such as air curtains , Return room, interlock, quick switch, etc.