TUNNEL FREEZING DEVICE Russian patent published in 2017 - IPC F25D13/06 

FIELD: heating system.

SUBSTANCE: air coolers in the freezer compartment are installed at the top and bottom of the metal perforated conveyor belt carrying the product to be cooled. The electro-convective device of the apparatus in the form of an electrogasdynamic system connected to the voltage source contains two electrode blocks arranged parallel to each other, one of which is located in the freezer compartment area under the upper cooler and the other - in the freezer compartment area below the lower cooler. Each of the blocks consists of wire type electrodes: generating and grounding. In the version of the unit, the generating electrode can be provided with EHD needle-shaped elements. When high voltage is applied to the unit electrodes, a corona discharge arises and, as a result, an electric wind appears forming the conditions for forced electroconvection. The areas of electrode blocks location are connected by a bypass, which has built-in electrode blocks at its input and output to intensify convection. Air humidity and frost formation adjustment is ensured by an electrode unit with EHD wire-type elements placed between the upper cooler and the bypass output channel area, connected to a voltage source via a voltage divider.

EFFECT: economic and technological efficiency of the device is increased due to reduction of energy consumption, reduction of freezing process duration, product shrinkage reduction, and provision of its electro-antiseptization.

3 cl, 4 dwg