Mechanical refrigeration technology
2018-04-27 14:00:29
1. What is mechanical refrigeration machinery? Refrigeration is the use of mechanical condensing systems in warehouses with good thermal insulation properties to transfer heat from high temperature objects (cooled objects) to low temperature objects (environmental mediums). The heat is transferred to the outside of the library, so that the temperature inside the library is reduced and kept within a range favorable for long-term storage of fruits and vegetables. The advantage of mechanical refrigeration is that it is not affected by external environmental conditions and can quickly and uniformly reduce the temperature of the storage. The temperature, humidity, and ventilation in the storage can be adjusted and controlled according to the requirements of the storage object.
2. The principle of mechanical refrigeration After the harvest of fruits and vegetables, their assimilation basically stops, but they are still living, and they will also perform respiration to decompose organic substances and release respiratory heat. Fresh fruits and vegetables have high water content, rich nutrients, poor protection of tissues, and are vulnerable to mechanical damage and microorganisms, and are perishable commodities. In order to store fresh fruits and vegetables well, besides the post-harvest commercialization, there must be corresponding storage facilities, equipped with refrigeration machinery, create suitable storage environment conditions, minimize respiratory metabolism, delay post-harvest and aging. The process, thereby prolonging the post-harvest life; at the same time, it can also effectively prevent the growth and reproduction of microorganisms and avoid the deterioration of fruits and vegetables caused by infestation.
When fruits and vegetables enter the cold storage, they bring a lot of field heat and respiratory heat. The heat in the library, heat leakage from the library, heat removal by the operator needs to be eliminated to maintain the low temperature in the library. This cooling process is accomplished through the change of state of the refrigerant. The working principle of mechanical refrigeration is to use the characteristics of the refrigerant absorbing heat from liquid to gas, reducing the temperature of fruits and vegetables in the store, and maintaining a constant low temperature conditions, to delay the aging of fruits and vegetables, prolong the storage life and maintain the quality of goods.
3. Refrigeration System The refrigeration system is the core of the cold storage system. It is mainly composed of a compression system, a condensing system, an evaporation system, and a regulating valve. There are also auxiliary components such as fans, ducts, and meters. The entire refrigeration system is a sealed circulation loop. The refrigerant circulates in the sealing system, and the supply quantity and the number of times of entering the evaporator are controlled as required to obtain a suitable low temperature condition. The compressor is the heart of the refrigeration system, which promotes the circulation of the refrigerant in the system. The role of the condenser is to eliminate the heat in the compressed gaseous refrigerant and condense it into a liquid refrigerant. The cooling methods of the condenser include air cooling, water cooling, and air-water combination. The air cooling is limited to small refrigerators. Application in refrigeration equipment. The role of the evaporator is to provide cold storage to the cold storage. The evaporator is installed in the cold storage. The blower blows the cooled air to various parts of the warehouse. The common wind tunnel of the large refrigerator is connected to the evaporator to extend the air supply distance. The temperature dropped more evenly.
2. The principle of mechanical refrigeration After the harvest of fruits and vegetables, their assimilation basically stops, but they are still living, and they will also perform respiration to decompose organic substances and release respiratory heat. Fresh fruits and vegetables have high water content, rich nutrients, poor protection of tissues, and are vulnerable to mechanical damage and microorganisms, and are perishable commodities. In order to store fresh fruits and vegetables well, besides the post-harvest commercialization, there must be corresponding storage facilities, equipped with refrigeration machinery, create suitable storage environment conditions, minimize respiratory metabolism, delay post-harvest and aging. The process, thereby prolonging the post-harvest life; at the same time, it can also effectively prevent the growth and reproduction of microorganisms and avoid the deterioration of fruits and vegetables caused by infestation.
When fruits and vegetables enter the cold storage, they bring a lot of field heat and respiratory heat. The heat in the library, heat leakage from the library, heat removal by the operator needs to be eliminated to maintain the low temperature in the library. This cooling process is accomplished through the change of state of the refrigerant. The working principle of mechanical refrigeration is to use the characteristics of the refrigerant absorbing heat from liquid to gas, reducing the temperature of fruits and vegetables in the store, and maintaining a constant low temperature conditions, to delay the aging of fruits and vegetables, prolong the storage life and maintain the quality of goods.
3. Refrigeration System The refrigeration system is the core of the cold storage system. It is mainly composed of a compression system, a condensing system, an evaporation system, and a regulating valve. There are also auxiliary components such as fans, ducts, and meters. The entire refrigeration system is a sealed circulation loop. The refrigerant circulates in the sealing system, and the supply quantity and the number of times of entering the evaporator are controlled as required to obtain a suitable low temperature condition. The compressor is the heart of the refrigeration system, which promotes the circulation of the refrigerant in the system. The role of the condenser is to eliminate the heat in the compressed gaseous refrigerant and condense it into a liquid refrigerant. The cooling methods of the condenser include air cooling, water cooling, and air-water combination. The air cooling is limited to small refrigerators. Application in refrigeration equipment. The role of the evaporator is to provide cold storage to the cold storage. The evaporator is installed in the cold storage. The blower blows the cooled air to various parts of the warehouse. The common wind tunnel of the large refrigerator is connected to the evaporator to extend the air supply distance. The temperature dropped more evenly.