Refrigeration – Display type – With air controlling or directing means
Patent
1989-09-29
1990-10-23
Tapolcai, William E.
Refrigeration
Display type
With air controlling or directing means
A47F 304
Patent
active
049642812
ABSTRACT:
A low-temperature showcase in which a double air curtain can be formed for a commodity inlet-outlet opening provided in one side of the case main body having a heat exchanger in an inner passage positioned upstream of and at a predetermined distance from another heat exchanger in an outer passage with respect to the same direction of air flows in the two passages, a partition wall defining the inner and outer passages and having a window at a portion thereof between the two heat exchangers, a passage change-over device for opening or closing the window to close or open the inner passage downstream of the window, a blower in each of said passages, and a control unit for giving instructions to the blowers and the passage change-over device for their operation, the control unit instructing the blowers to move air through the two passages in a first direction when at least the inner passage heat exchanger is operating for refrigeration and the control means instructing the passage change-over means to open the window and cause the blowers to operate to direct a part of the air flowing in the outer passage to flow through the open window into the inner passage and its heat exchanger in a second direction which is opposite to the first direction.
REFERENCES:
patent: 4312190 (1982-01-01), Ibrahim et al.
patent: 4648247 (1987-03-01), Takizawa et al.
patent: 4691527 (1987-09-01), Ikeda
patent: 4741171 (1988-05-01), Toshiyuki
Sanyo Electric Co,. Ltd.
Tapolcai William E.
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