JPS57129345A - Electric 'kotatsu' - Google Patents

Electric 'kotatsu'

Info

Publication number
JPS57129345A
JPS57129345A JP1471581A JP1471581A JPS57129345A JP S57129345 A JPS57129345 A JP S57129345A JP 1471581 A JP1471581 A JP 1471581A JP 1471581 A JP1471581 A JP 1471581A JP S57129345 A JPS57129345 A JP S57129345A
Authority
JP
Japan
Prior art keywords
receiving
heater
kotatsu
electric
controller
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
JP1471581A
Other languages
Japanese (ja)
Inventor
Kazuo Kaneko
Mitsuru Watanabe
Wataru Hashimoto
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.)
Hitachi Heating Appliances Co Ltd
Hitachi Netsu Kigu KK
Original Assignee
Hitachi Heating Appliances Co Ltd
Hitachi Netsu Kigu KK
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 Hitachi Heating Appliances Co Ltd, Hitachi Netsu Kigu KK filed Critical Hitachi Heating Appliances Co Ltd
Priority to JP1471581A priority Critical patent/JPS57129345A/en
Publication of JPS57129345A publication Critical patent/JPS57129345A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1902—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value
    • G05D23/1905—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value associated with tele control

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electric Stoves And Ranges (AREA)
  • Control Of Temperature (AREA)

Abstract

PURPOSE:To suppress the abrupt electric power change of a heater by a method wherein a means for holding for a predetermined time is given to the receiving side of a device a device detecting the change of the form of a space within the 'kotatsu' by means of ultrasonic wave. CONSTITUTION:A means for transmitting ultrasonic wave 5, a means for receiving the wave 6 and the heater 3 are provided in the space 2 within the body 1 of the electric 'kotatsu'. The receiving means 6 consists of an ultrasonic oscillator for receiving 9, an amplifier 10, a detector 11, a differentiator 12, a comparator 13 and a standard value setting circuit 14 and the output of the means 6 is inputted in a controller 7. The controller 7 has the holding function 1 comprising a counter means and a memory means, rendering in sending a controlling output to the heater 3 after the elapse of predetermined time (for example, after 10-30sec) since the receipt of signal from the receiving means 6.
JP1471581A 1981-02-03 1981-02-03 Electric 'kotatsu' Pending JPS57129345A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1471581A JPS57129345A (en) 1981-02-03 1981-02-03 Electric 'kotatsu'

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1471581A JPS57129345A (en) 1981-02-03 1981-02-03 Electric 'kotatsu'

Publications (1)

Publication Number Publication Date
JPS57129345A true JPS57129345A (en) 1982-08-11

Family

ID=11868837

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1471581A Pending JPS57129345A (en) 1981-02-03 1981-02-03 Electric 'kotatsu'

Country Status (1)

Country Link
JP (1) JPS57129345A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02171809A (en) * 1988-12-23 1990-07-03 Matsushita Electric Works Ltd Ultrasonic detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02171809A (en) * 1988-12-23 1990-07-03 Matsushita Electric Works Ltd Ultrasonic detector

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