Abstract: This invention relates to a system and apparatus for electronic control of an absorption refrigeration machine. The flow of liquids within the machine, as well as the concentration of the refrigerant/absorbent mixture solution are precisely controlled through the use of solenoid valves. These solenoids are controlled via a microprocessor control system with various sensors attached, which may include fluid level sensors, pressure sensors, temperature sensors and other environmental data sensors.

Abstract: An intermittent ammonia-water absorption refrigerator, designed as a stack of vertical plates, having bypass, temperature control, and heat recovery, consisting of two generators, three absorbers, one evaporator, one condenser, two solution-steam pumps controlled by two control valves wherein, for the structuring of the plate stack, in addition to the thin, two-dimensional moulding plates for generators, absorbers, condenser, and evaporator, thick moulding plates having three-dimensional elements for containers, pumps, and distribution channels are used, and the plate stack consists of three face-bonded partial stacks, of which the outer-most contain containers, pumps, and distribution channels, the center stack having the generators, absorbers, condenser, and evaporator is narrower, such that there is a recessed vertical longitudinal channel on the side of the entire plate stack in which the control elements of the machine are installed.