GB652215A - Thermo-pump heating systems - Google Patents

Abstract

652,215. Heat pumps; ice-making. EVANS, J. H. Oct. 7,1947, No. 30403/49. Divided out of 652,162. [Class 29] [Also in Group X] in neat pumps deriving the low-temperature heat from the continuous freezing of water the ice is formed in tapered tubes 20 surrounded by evaporating refrigerant and due to the pressure within the tubes is continuously extruded upwards and is collected at 26 and allowed to melt, the melt water being recirculated to the evaporator 14. Hot compressed refrigerant from the compressor 1 driven by an internal combustion engine 2 passes by a pipe 4 to a condenser 5 situated in the ventilating duct 41 of a building so as to warm the entering air. Condensed refrigerant is collected in a vessel 9 and supplied through pipe 10 and pre-cooler 11 to a chamber 12 through a float valve 13, and is fed through a pipe 16 to the ice-making evaporator 14. Refrigerant vapour mixed with liquid leaves the evaporator through a pipe 17 which branches at 18 within the chamber 12 to return the liquid refrigerant to the lower part of the chamber without breaking the syphonic circulation, and the vaporized refrigerant to the upper part of the chamber whence it returns to the compressor through the precooler 11 and pipe 3. The ice is formed in the tapering tubes 20 the lower orifices of which are fed with water from an insulated tank 22 the level in which is controlled by a float so that the tubes 20 are completely filled. Surrounding the lower orifices of the tubes 20 is a shallow jacket 21 through which circulates brine cooling medium for the compressor cylinder 1. Due to the taper of the tubes 20 the ice formed is extruded upwards and the columns reaching an inclined canopy 24 will be broken off and force other rising columns of ice towards a shoot 25 down which the ice falls to the pile 26 where it melts the water passing to an underground tank 29. A pump 30 returns this water to the tank 22. The cooling jacket of the engine 2 is connected by pipes 33, 35 to an air heater 34 in the duct 41, and the exhaust gases pass by a pipe 36 to an air heater 37 in the duct and thence to a jacket 39 surrounding the ventilation air inlet pipe 6, escaping at 40. A fan 8 draws air through the pipe 6 and supplies it to the building through the duct 41 and outlets 42. Vitiated air is extracted at 43 and recirculated or discharged at 26 to aid the melting of the ice. The building can be heated by water circulation instead of by air. Specification 652,162 is referred to.