BOMBA DE CALOR

• Main Author: LENARDUZZI, FRANK J
• Format: Patent
• Language: Spanish
• Published: 16.05.1996
• Edition: 6
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; WEAPONS

UNA BOMBA DE CALOR DE FUENTE A TIERRA QUE CONSTA DE UN CIRCUITO DE BOBINA INTERNO (4) Y UN CIRCUITO DE BOBINA EXTERNO (2) QUE UTILIZA UN COMPRESOR DE ROLLO (10) PARA PRESURIZAR EL REFRIGERANTE. LA BOBINA EXTERNA (40) PUEDE CONSTAR DE BOBINAS DE TIERRA (40A, 40B, 40C) FORMADAS DE TUBOS DE COBRE EN CONFIGURACION ESPIRAL. UN DISPOSITIVO DE CONTROL DE CARGA (60) CONTROLA EL VOLUMEN DE REFRIGERANTE EN EL SISTEMA EN LOS MODOS DE CALEFACCION Y REFRIGERACION. UN RESTRICTOR (42) EN PARALELO CON UNA VALVULA DE EXPANSION TERMICA (44) PERMITE UN FLUJO BASE DE REFRIGERANTE EN LA BOBINA EXTERNA (40) EN EL MODO DE CALEFACCION. UN ACUMULADOR (20) VA PROVISTO CON UN CONMUTADOR DE NIVEL (22) QUE CONTROLA UNA VALVULA SOLENOIDE (39) CONECTADO EN PARALELO A UNA VALVULA DE EXPANSION TERMICA (32, 33) QUE ALIMENTA LA BOBINA INTERNA (30). EL COMPRESOR DE ROLLO (10) INCLUYE UN PUERTO DE DESCARGA QUE TIENE UNA VALVULA DE COMPROBACION (12) FUNCIONANDO CONJUNTAMENTE CON UNA VALVULA SOLENOIDE (14) PARA ATRAPAR EL REFRIGERANTE DE ALTA PRESION EN EL CIRCUITO CONDENSADOR DURANTE LOS CICLOS DE PARADA DEL COMPRESOR. SE PROPORCIONAN MEDIOS (50, 51) PARA CERRAR UNA DE LAS BOBINAS DE TIERRA (40A, 40B, 40C) PARA REDUCIR LA LONGITUD EFECTIVA DE LA BOBINA EXTERNA (40). A ground source heat pump comprising an indoor coil circuit (4) and an outdoor coil circuit (2) utilizes a scroll compressor (10) to pressurize the refrigerant. The outdoor coil (40) may comprise ground coils (40a, 40b, 40c) formed from copper tubing into a spiral configuration. A charge control device (60) controls the volume of refrigerant in the system in heating and cooling modes. A restrictor (42) in parallel with a thermal expansion valve (44) permits a base flow of refrigerant into the outdoor coil (40) in heating mode. An accumulator (20) is provided with a level switch (22) controlling a solenoid valve (39) connected in parallel to a thermal expansion valve (32, 33) feeding the indoor coil (30). The scroll compressor (10) includes a discharge port having a check valve (12) operating in conjunction with a solenoid valve (14) to trap high pressure refrigerant in the condenser circuit during compressor off cycles. Means (50, 51) for closing off one of the ground coils (40a, 40b, 40c) to reduce the effective length of the outdoor coil (40) is provided.