JPS5432852A - Frost detector - Google Patents

Frost detector

Info

Publication number
JPS5432852A
JPS5432852A JP9905777A JP9905777A JPS5432852A JP S5432852 A JPS5432852 A JP S5432852A JP 9905777 A JP9905777 A JP 9905777A JP 9905777 A JP9905777 A JP 9905777A JP S5432852 A JPS5432852 A JP S5432852A
Authority
JP
Japan
Prior art keywords
frost
oscillation circuit
frost detector
trembler
piezo
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.)
Granted
Application number
JP9905777A
Other languages
Japanese (ja)
Other versions
JPS5653180B2 (en
Inventor
Masao Kasahara
Akira Tokushima
Yukihiko Ise
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 JP9905777A priority Critical patent/JPS5432852A/en
Publication of JPS5432852A publication Critical patent/JPS5432852A/en
Publication of JPS5653180B2 publication Critical patent/JPS5653180B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Defrosting Systems (AREA)

Abstract

PURPOSE: To positively detect and remove frost, by connecting a trembler obtained by mounting a piezo-electric body sheet to a vibration piece, which mechanical efficiency lowers by the attachment of frost, to a transistor arranging an oscillation circuit, and by detecting the output of the oscillation circuit.
COPYRIGHT: (C)1979,JPO&Japio
JP9905777A 1977-08-17 1977-08-17 Frost detector Granted JPS5432852A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9905777A JPS5432852A (en) 1977-08-17 1977-08-17 Frost detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9905777A JPS5432852A (en) 1977-08-17 1977-08-17 Frost detector

Publications (2)

Publication Number Publication Date
JPS5432852A true JPS5432852A (en) 1979-03-10
JPS5653180B2 JPS5653180B2 (en) 1981-12-17

Family

ID=14237034

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9905777A Granted JPS5432852A (en) 1977-08-17 1977-08-17 Frost detector

Country Status (1)

Country Link
JP (1) JPS5432852A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7572186B2 (en) 2020-08-24 2024-10-23 アルプスアルパイン株式会社 Operating device

Also Published As

Publication number Publication date
JPS5653180B2 (en) 1981-12-17

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