Performance of freezer

The performance of the freezer is divided into many aspects, which must be comprehensively considered. For example: energy efficiency ratio, noise, etc. If it is air-cooled freezer, pay attention to the air volume. So what is the energy efficiency ratio of the freezer? The ratio of the refrigerating capacity of the freezer to the power consumed is called the energy efficiency ratio (EER), which is the coefficient of performance (COP). It is the energy consumption index that represents the refrigeration efficiency, and it is generally marked on the nameplate or manual of the freezer. Performance coefficient is an important technical and economic index of refrigeration system (refrigerator). The higher the coefficient of performance, the higher the energy efficiency of the refrigeration system (refrigerator). This is a coefficient related to refrigerant type and operating conditions. The theoretical coefficient of refrigeration performance can reach 2.5 - 5. Because this parameter is expressed by the ratio of input and output in the same unit, it is a dimensionless number. In absorption or steam jet refrigerators, the thermodynamic coefficient is used to represent this characteristic, which is consistent with the meaning of refrigeration coefficient. The energy efficiency ratio (EER) is often used in the United States, which is called the energy utilization coefficient by the domestic technical community. It is defined as the ratio of the refrigerating capacity (expressed in Btu/h, lBtu=1.06kl) and the total input power (expressed in W) under the specified conditions. The meaning is also consistent.

What is the power, air volume and noise of the freezer? Power refers to the actual consumed power of the freezer, that is, the total power consumed by the freezer measured during the performance test under the specified working conditions. Generally, the input power of the freezer is marked on the nameplate or the manual of the product. The air volume of the freezer refers to the circulating air volume of the indoor evaporator, which is determined by the design department and not specified in the national standard. Because the air volume is related to the evaporator area, the air volume of the same refrigerator produced by different manufacturers is not the same. The noise of the freezer can be divided into the noise of the indoor evaporation unit and the noise of the outdoor condensing unit. Generally, the noise of the indoor unit is lower than that of the outdoor unit. This is because the noise of the outdoor unit comes from the noise of the sound compressor and the fan, while the noise of the indoor unit comes from the air flow noise of the fan and the electromagnetic noise of the motor.

What is the refrigerating capacity of the freezer? Refrigeration capacity is the heat transferred by the refrigerator (freezer) from low temperature object to high temperature object in unit time. The nominal refrigerating capacity of the refrigerator nameplate is the nominal refrigerating capacity, which is generally measured under the condition that the indoor temperature is 27 ℃ and the outdoor temperature is 35 ℃. If the indoor temperature is lower than 27 ℃ and the outdoor temperature is higher than 35 ℃, the cooling capacity must be lower than the nominal cooling capacity. According to the national standard, the measured refrigerating capacity is allowed to be no less than 95% of the nominal refrigerating capacity of the nameplate. The unit of refrigerating capacity is watt. In some countries, the unit of refrigerating capacity is also expressed in cold tons (cold t). 1 cold t refers to the refrigerating capacity required for water at 0 ℃ to freeze into ice at 0 ℃ within 24 hours.