JPS55122248A - Condensation detection unit - Google Patents

Condensation detection unit

Info

Publication number
JPS55122248A
JPS55122248A JP2915079A JP2915079A JPS55122248A JP S55122248 A JPS55122248 A JP S55122248A JP 2915079 A JP2915079 A JP 2915079A JP 2915079 A JP2915079 A JP 2915079A JP S55122248 A JPS55122248 A JP S55122248A
Authority
JP
Japan
Prior art keywords
vtr
condensation
atmosphere
temperature
thermistors
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
JP2915079A
Other languages
Japanese (ja)
Inventor
Takekatsu Morimoto
Akira Matsuhisa
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 JP2915079A priority Critical patent/JPS55122248A/en
Publication of JPS55122248A publication Critical patent/JPS55122248A/en
Pending legal-status Critical Current

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  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

PURPOSE: To improve reliability and make irregularity of the response time fixed, by detecting the temperature difference between two points of an electric apparatus to detect the condensation state.
CONSTITUTION: Thermistors and fitted to four positions A, B, C, and D of VTR 1. Position A is in the lower side of chassis 7 and changes the temperature according to temperature rise of the VTR chassis, and position B is placed in a distant position which is not affected by the internal temperature of the VTR, and position C is near ceiling 8 and is comparatively near the external atmosphere, and position D is placed in a position where rise of the internal temperature of the VTR is large. Now, a circuit having a hysteresis characteristic where the condensation output is issued for the resistance ratio of thermistors A and B of 125% and the output is turned off for the ratio of 100% when VTR 1 is taken out to the atmosphere at 25°C after leaving VTR 1 in the atmosphere at 0°C is used as a detection circuit, so that high-reliability condensation detection is possible.
COPYRIGHT: (C)1980,JPO&Japio
JP2915079A 1979-03-12 1979-03-12 Condensation detection unit Pending JPS55122248A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2915079A JPS55122248A (en) 1979-03-12 1979-03-12 Condensation detection unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2915079A JPS55122248A (en) 1979-03-12 1979-03-12 Condensation detection unit

Publications (1)

Publication Number Publication Date
JPS55122248A true JPS55122248A (en) 1980-09-19

Family

ID=12268221

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2915079A Pending JPS55122248A (en) 1979-03-12 1979-03-12 Condensation detection unit

Country Status (1)

Country Link
JP (1) JPS55122248A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58128038A (en) * 1982-01-27 1983-07-30 Hitachi Ltd Heater for preventing dew condensation
JPS62190455A (en) * 1986-02-17 1987-08-20 Shinwa Package Kk Dew condensation monitoring device
JPS63105927U (en) * 1986-12-24 1988-07-08

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58128038A (en) * 1982-01-27 1983-07-30 Hitachi Ltd Heater for preventing dew condensation
JPS62190455A (en) * 1986-02-17 1987-08-20 Shinwa Package Kk Dew condensation monitoring device
JPH0531103B2 (en) * 1986-02-17 1993-05-11 Shinwa Patsukeeji Kk
JPS63105927U (en) * 1986-12-24 1988-07-08
JPH0433559Y2 (en) * 1986-12-24 1992-08-11

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