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Title:
CONTROLLER FOR FREEZER
Document Type and Number:
Japanese Patent JPH04225754
Kind Code:
A
Abstract:

PURPOSE: To operate a freezer with a small output as much as possible under any load, by controlling a ratio of on and off times of a solenoid valve connected with an upstream side of an evaporator.

CONSTITUTION: A compressor 1 of a freezer includes three compressors 11 to 13 having a common pressure line 14 and a common suction line 15 and evaporators 41 to 61 each in three freezing chambers 4 to 6, and solenoid valves 42 to 62 are connected with an upstream side of the evaporators 41 to 61. The solenoid valves 42 to 62 are connected in series with expansion valves 43 to 63 and form constituent units 44 to 64 together with the latter valves. Herein, temperature sensors 46 to 66 of thermostat switches 47 to 67 are provided in the freezing chambers 4 to 6. A ratio of on/off times of the solenoid valves 42 to 62 is controlled on the basis of outputs from the temperature sensors 46 to 66, whereby an output of a compressor 1 is adjusted such that a maximum load approaches 1.


Inventors:
KUNUUDO BUAGUN BUARUBIYORUN
Application Number:
JP6970491A
Publication Date:
August 14, 1992
Filing Date:
April 02, 1991
Export Citation:
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Assignee:
DANFOSS AS
International Classes:
F25B5/02; F25B49/02; G05D23/19; F25B41/04; F25B41/06; (IPC1-7): F25B5/02
Domestic Patent References:
JPS61174431A1986-08-06
Attorney, Agent or Firm:
Minoru Nakamura (8 outside)