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JPS5375995A - Frost detector - Google Patents

Frost detector

Info

Publication number
JPS5375995A
JPS5375995A JP15157176A JP15157176A JPS5375995A JP S5375995 A JPS5375995 A JP S5375995A JP 15157176 A JP15157176 A JP 15157176A JP 15157176 A JP15157176 A JP 15157176A JP S5375995 A JPS5375995 A JP S5375995A
Authority
JP
Japan
Prior art keywords
frost detector
frost
oscillating
variation
simply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15157176A
Other languages
Japanese (ja)
Inventor
Masao Kasahara
Yukihiko Ise
Akira Tokushima
Shigeru Hayakawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15157176A priority Critical patent/JPS5375995A/en
Publication of JPS5375995A publication Critical patent/JPS5375995A/en
Pending legal-status Critical Current

Links

Landscapes

  • Defrosting Systems (AREA)

Abstract

PURPOSE: To simply and correctly detect the front formation directly as a variation in electric signals by providing an oscillating circuit and a detecting circuit connected thereto in a frost detecting element which is equipped with an oscillating member having a thin plate of piezoelectric porcelain.
COPYRIGHT: (C)1978,JPO&Japio
JP15157176A 1976-12-16 1976-12-16 Frost detector Pending JPS5375995A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15157176A JPS5375995A (en) 1976-12-16 1976-12-16 Frost detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15157176A JPS5375995A (en) 1976-12-16 1976-12-16 Frost detector

Publications (1)

Publication Number Publication Date
JPS5375995A true JPS5375995A (en) 1978-07-05

Family

ID=15521426

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15157176A Pending JPS5375995A (en) 1976-12-16 1976-12-16 Frost detector

Country Status (1)

Country Link
JP (1) JPS5375995A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008091110A1 (en) * 2007-01-25 2008-07-31 Chungju National University Industry-Academic Cooperation Foundation Method and apparatus for sensing frost

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008091110A1 (en) * 2007-01-25 2008-07-31 Chungju National University Industry-Academic Cooperation Foundation Method and apparatus for sensing frost

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