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NEW SPLIT SYSTEM HEAT PUMPS WITH LARGE ROTARY COMPRESSORS.

[In Japanese. / En japonais.]

Author(s) : OHTSUKA M.

Type of article: Article

Summary

SHIPMENTS OF UNITARY AIR CONDITIONERS TO THE JAPANESE DOMESTIC MARKET IN 1985 WERE ROUGHLY 520,000 UNITS AMOUNTING TO 1 BILLION US DOLLARS. IN THE UNITARY MARKET, HEAT PUMP MODELS DOMINATED MORE THAN 70% OF SHIPMENTS AND MODELS BELOW 21 KILOW CAPACITY EXCEEDED 90%. WITH THE RISE IN MONTHLY SHOP RENTAL FEES, CUSTOMERS TEND TO SELECT SPACE-SAVING CEILING TYPE UNITS MORE THAN EVER. IN SPITE OF OTHER ADVANTAGEOUS FEATURES, HOT AIR DISTRIBUTION FROM THE INDOOR UNIT IN THE CONVENTIONAL CEILING TYPE HEAT PUMP FAILED TO GIVE SATISFACTION TO CUSTOMERS. TO SOLVE THIS PROBLEM, THE AUTHORS DEVELOPED CAPACITY CONTROLLABLE LARGE-OUTPUT COMPRESSORS AND BETTER COLD/HOT AIR DISTRIBUTION SYSTEMS. SPECIAL REFRIGERANT CIRCUITS, IN ADDITION TO THE CAPACITY CONTROLLABLE COMPRESSORS, ELIMINATED AUXILIARY HEATER ELEMENTS. THUS HEATING, RUNNING COSTS, RELIABILITY AND SAFETY WERE GREATLY IMPROVED.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1987-1151
  • Languages: Japanese
  • Source: Refrigeration - vol. 61 - n. 699
  • Publication date: 1986
  • Document available for consultation in the library of the IIR headquarters only.

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