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JPS5435449A - Frost detector - Google Patents

Frost detector

Info

Publication number
JPS5435449A
JPS5435449A JP10213277A JP10213277A JPS5435449A JP S5435449 A JPS5435449 A JP S5435449A JP 10213277 A JP10213277 A JP 10213277A JP 10213277 A JP10213277 A JP 10213277A JP S5435449 A JPS5435449 A JP S5435449A
Authority
JP
Japan
Prior art keywords
frost detector
frost
defrost
piezo
oscillation
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
JP10213277A
Other languages
Japanese (ja)
Inventor
Akira Tokushima
Yukihiko Ise
Masao Kasahara
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 JP10213277A priority Critical patent/JPS5435449A/en
Publication of JPS5435449A publication Critical patent/JPS5435449A/en
Pending legal-status Critical Current

Links

Landscapes

  • Defrosting Systems (AREA)

Abstract

PURPOSE: To de early defrost for preventing deterioration of cooling effect, by detecting a change due to frost in oscillation of a plate type vibrator fixed with a piezo-electric element.
COPYRIGHT: (C)1979,JPO&Japio
JP10213277A 1977-08-24 1977-08-24 Frost detector Pending JPS5435449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10213277A JPS5435449A (en) 1977-08-24 1977-08-24 Frost detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10213277A JPS5435449A (en) 1977-08-24 1977-08-24 Frost detector

Publications (1)

Publication Number Publication Date
JPS5435449A true JPS5435449A (en) 1979-03-15

Family

ID=14319237

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10213277A Pending JPS5435449A (en) 1977-08-24 1977-08-24 Frost detector

Country Status (1)

Country Link
JP (1) JPS5435449A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348869A (en) * 1980-09-02 1982-09-14 The Stoneleigh Trust Means for detecting the accumulation of frost in a low temperature refrigeration system
JPS59158685A (en) * 1983-02-28 1984-09-08 Sony Corp Still picture reproducing device
JPS6166278A (en) * 1984-09-07 1986-04-05 Mitsubishi Electric Corp Video recording and reproducing device
JPS61161084A (en) * 1985-01-08 1986-07-21 Mitsubishi Electric Corp Video recording and reproducing device
JPS62289073A (en) * 1986-06-09 1987-12-15 Sony Corp Video printer
JPS62289072A (en) * 1986-06-09 1987-12-15 Sony Corp Video printer
JPH01156071A (en) * 1987-12-14 1989-06-19 Hitachi Ltd Video printer auto indexing device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348869A (en) * 1980-09-02 1982-09-14 The Stoneleigh Trust Means for detecting the accumulation of frost in a low temperature refrigeration system
JPS59158685A (en) * 1983-02-28 1984-09-08 Sony Corp Still picture reproducing device
JPS6166278A (en) * 1984-09-07 1986-04-05 Mitsubishi Electric Corp Video recording and reproducing device
JPS61161084A (en) * 1985-01-08 1986-07-21 Mitsubishi Electric Corp Video recording and reproducing device
JPS62289073A (en) * 1986-06-09 1987-12-15 Sony Corp Video printer
JPS62289072A (en) * 1986-06-09 1987-12-15 Sony Corp Video printer
JPH01156071A (en) * 1987-12-14 1989-06-19 Hitachi Ltd Video printer auto indexing device

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