Technical points for design and connection of fresh-keeping cold storage refrigeration compressor

Technical points for design and connection of fresh-keeping cold storage refrigeration compressor

Fresh-keeping cold storage is widely used for fruit, apple, pear, winter jujube, cherry, grape and other fruit storage. It is a fruit and vegetable production base, food processing unit and other equipment that needs to be kept in the fresh-keeping industry. Because it is used for refrigerated storage of different types of fruits and vegetables, the design temperature of the general fresh-keeping cold storage is in the range of -5 °C - 15 °C. The above-mentioned refrigeration temperature environment requirements make the cold storage refrigeration compressor have certain technical specifications on the design connection. In order to facilitate the majority of users to deeply understand the structural characteristics of connecting this type of cold storage, the following Xin Yunhua refrigeration equipment will mainly focus on the design and connection technology of the fresh-keeping cold storage refrigeration compressor as follows:

First of all, the maximum inclination angle of the fresh-keeping refrigerator refrigeration compressor should not exceed 7° in the vertical direction. All compressors are provided with four rubber pads and metal sleeves. These screws must be used when installing the compressor. Recommended torque: 21Nm (±1Nm). Each compressor is filled with 0.3-0.7 bar of dry nitrogen and is sealed by a rubber stopper.

Secondly, when the fresh-keeping cold storage refrigeration compressor releases the nitrogen seal, it must first deflate the low-pressure needle valve to avoid the injection of the compressor oil. First, remove the suction end sealing plug, then remove the exhaust end sealing plug, only in compression. Before the machine enters the system, the sealing plug is removed to prevent moisture from entering the compressor. After the sealing plug is removed, the compressor should be kept in an upright position to prevent oil from flowing out. Do not bend the compressor suction and exhaust pipes or force the system piping to the compressor as this will increase stress and increase the risk of system failure. For the copper material desorption and exhaust pipe, copper-phosphorus welding material is used for welding. If flux is needed, please use flux or welding wire with flux. To avoid system contamination, please do not apply flux directly to ordinary electrode. On the wire.

Finally, when piping the fresh-keeping cold storage refrigeration compressor, do not overheat the compressor casing, which will seriously damage the internal components of the compressor. It is strongly recommended to use a heat shield box/or heat absorber. When welding the suction and exhaust ports, the following steps are recommended:

1. Make sure that the electrical wiring is not connected to the compressor.

2. Protect the junction box and compressor spray surface from flame damage

3. Use a clean copper tube for the refrigeration system and clean all connections.

4. Blow in the compressor to avoid oxidation or combustion, and ensure that the compressor is not exposed to air for too long. It is recommended to use a double welding head for simultaneous heating to ensure uniform heating.

5. Remove the remaining weld slag with a damp cloth or wire brush. Residual slag can cause corrosion in the pipeline.

It is worth noting that once the solder or flux of the refrigeration equipment enters the pipeline or the compressor, due to its acidic nature, it will cause serious damage to the system or the inside of the compressor.