1 Scope of application The refrigerator is used to provide 2℃~8℃ storage environment, and the freezer is used to provide -10℃~-25/-40℃ storage environment, for medical institutions to store reagents, vaccines, frozen plasma and other samples. The freezer is used to provide -10℃~-25/-40℃ storage environment for medical institutions to store reagents, vaccines, frozen plasma and other samples. 2 Working environment a) Indoor only; b) Ambient temperature: 10℃～32℃; c) Relative humidity: ≤80%; d) Power supply: AC220V/50Hz; e) No strong vibration and corrosive gas around; f) No direct sunlight and other hot and cold sources. 3 Product parameters Volume: 450L Temperature range Cold room：2～8℃ / Freezer：-10～-40℃ Climate type SN/N External Dimensions 741×811×1889 (W×D×H)(mm) Noise ≤68 dB(A) Refrigerant Cold room: R290/Freezer: R290 4 Product Performance 4.1 Storage temperature The temperature of the refrigerating and freezing box is set at 5℃, and the temperature of each measuring point should not deviate from the range of 2℃～8℃ under the steady state, and the temperature inside the box should not deviate from the range of 8℃. 8℃ range, the temperature inside the box should not deviate from the range of 3.5℃～6.5℃, and the instantaneous value of the temperature at each measuring point inside the box should not be less than 0.5℃. 4.2 Characteristic point temperature The temperature at the characteristic point of the freezer ≤ -25/-40℃.4 4.3 Temperature uniformity The temperature uniformity of the freezer room should be no more than 4 (+2/-2)°C. 4.4 Temperature fluctuation 4.4 Temperature fluctuation The temperature fluctuation of the cold storage room should be no more than 4.5℃. 4.5 Temperature display (a) The temperature deviation of the display in the freezer room should be no more than 2℃. (b) The freezer room should have a device to display the temperature inside the box, the temperature display of the smallest index value of 1 ℃ or better, the display temperature and the set temperature difference should not be more than 1 ℃. The difference between the display temperature and the set temperature shall be less than 3℃. 4.6 Noise The noise level of this refrigerator/freezer is less than 68dB(A).