Air conditioner having frost preventing member

Details Air conditioner having frost preventing member Air conditioner having frost preventing member

1995-09-29

1997-02-04

Tanner, Harry B.

Refrigeration

Automatic control

Refrigeration producer

62223, 62502, 62150, F25B 1300

Patent

active

055987176

ABSTRACT:
An air conditioner using a non-azeotropic mixture refrigerant formed of a high boiling-point refrigerant and a low boiling-point refrigerant is provided with a first temperature sensor for detecting a temperature at an inlet of an outdoor heat exchanger when the outdoor heat exchanger serves as an evaporator in heating cycle, a second temperature sensor for detecting an outside air temperature, and a controller for controlling an opening degree of an expansion valve on the basis of a temperature difference between the outside air temperature and the inlet temperature of said evaporator. For example, the opening degree of the expansion valve is controlled so that the temperature difference between the outside air temperature and the inlet temperature is equal to a predetermined value.

REFERENCES:
patent: 4698981 (1987-10-01), Kaneko et al.
patent: 5425246 (1995-06-01), Bessler
patent: 5440895 (1995-08-01), Bahel et al.

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