Vacuum cooling device for household and industrial use

摘要

The device has a vacuum pump which evacuates the cooling device until a pressure of about 2 bars is attained. The greater the difference in pressure between the internal and ambient pressure, the tighter is the seal on the door. The door handle contains the switch which is used to switch the vacuum pump on and off and the knob for opening a valve to allow air to enter the device when the door is to be opened.