The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 1990
Filed:
Sep. 29, 1989
Tsutomu Tanaka, Oizumi, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
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.