Small and medium-sized fresh cold storage installation need to pay attention to what things? Only when these factors are taken into consideration before designing and installing can the normal use of small and medium sized cold storage be guaranteed in the later period.

Small and medium-sized fresh cold storage installation notes:

1, the volume of cold storage

The size of the cold storage should be designed based on the maximum amount of agricultural products to be stored throughout the year. This capacity is calculated based on the volume that must be occupied to store the product in the cold storage, plus the distance between the rows, the space between the stack and the wall, the ceiling, and the gap between the packages. After determining the capacity of the cold storage, determine the length and height of the cold storage.

2, Cold storage location selection and preparation

Cold storage design also needs to consider the necessary outbuildings and facilities, such as workshops, packing and finishing rooms, tool storage and loading docks. According to the nature of use, cold storage can be divided into three categories: distributed cold storage, retail cold storage, and production cold storage. The production cold storage is built in the production areas where the sources of supply are relatively concentrated. Factors such as convenient transportation and contact with the market should also be considered. There should be good drainage conditions around the cold storage, the groundwater level should be low, there should be a compartment under the cold storage, and keep the ventilation well. Keeping dry is very important for the cold storage.

3, cold storage insulation material selection

The choice of cold storage insulation materials must be adapted to local conditions, both good thermal insulation and economical and practical. The structure of the modern cold storage is developing toward the assembly cold storage, and the cold storage components including the moisture-proof layer and the thermal insulation layer are made to be assembled on site. The advantages are that the construction is convenient, fast, and can be moved, but the cost is relatively high.

4, the choice of cold storage system

The choice of cold storage cooling system is mainly the selection of cold storage compressors and evaporators. Under normal circumstances, the use of fully enclosed compressors is the main choice for small refrigerators. Medium-sized cold storage generally uses semi-hermetic compressors; semi-enclosed compressors are used in large cold storages, but the cold storage design and installation of cold storage are relatively cumbersome.

5, the choice of refrigeration compressor

In the cold storage device of the cold storage, the capacity and quantity of refrigeration compressor cold storage equipment are based on the maximum heat load of the production scale, and are configured in consideration of various refrigeration parameters. In actual production, it is impossible to completely match the design conditions. Therefore, it must be selected and adjusted according to actual production conditions to determine the capacity and quantity of compressors that are reasonably put into operation in order to complete the required refrigeration tasks of the cold storage with the lowest consumption and the most suitable conditions.

When selecting and adjusting the compressor in cold storage design and installation, the following points should be followed:

1. The compressor is selected according to the amount of cold heat load and the capacity of the evaporator cooling capacity, so that the compressor cooling capacity put into operation can be adapted to the heat load and the refrigeration capacity of the cold storage refrigeration equipment.

2. When the required evaporation temperature is high and the actual condensing temperature is high, bipolar compression refrigeration is required. Generally, the compression ratio is equal to 8 as the boundary. When the compression ratio is less than 8, single-stage compression is used. When the compression ratio is greater than or equal to 8, bipolar compression is used.

3. Make each machine load as much as possible with the heat load of one evaporating temperature. The true sample can get better cooling effect.

4. The bipolar compressor or the bipolar compressor group can reasonably adjust the volume ratio of the high and low pressure compressors according to the intermediate temperature, the condensing temperature, the evaporation temperature, and the like.

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