JPS54154145A - Defrosting control circuit for air-cooled heat pump type chiller unit - Google Patents

Defrosting control circuit for air-cooled heat pump type chiller unit

Info

Publication number
JPS54154145A
JPS54154145A JP6232678A JP6232678A JPS54154145A JP S54154145 A JPS54154145 A JP S54154145A JP 6232678 A JP6232678 A JP 6232678A JP 6232678 A JP6232678 A JP 6232678A JP S54154145 A JPS54154145 A JP S54154145A
Authority
JP
Japan
Prior art keywords
defrosting
time
pressure
started
switch
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
JP6232678A
Other languages
Japanese (ja)
Inventor
Akiyoshi Taga
Isamu Horiuchi
Hirokiyo Terada
Fumihiko Kitani
Kazuo Yoshioka
Teruaki Kojima
Takashi Kawakami
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 Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6232678A priority Critical patent/JPS54154145A/en
Publication of JPS54154145A publication Critical patent/JPS54154145A/en
Pending legal-status Critical Current

Links

Landscapes

  • Defrosting Systems (AREA)

Abstract

PURPOSE: A defrosting control circuit wherein the defrosting is started after a predetermined lapse of time through the function of a defrosting thermostat and a defrosting time-limit relay, comprising a high-pressure pressure switch which finish the defrosting when the pressure rises during the limit time and a time-limit relay which finish the defrosting when the pressure does not rise during the limit time.
CONSTITUTION: With a predetermined lapse of time after heating is started, a decider DS detects the frosting based on the temperature drop in an air flow-side heat exchanger, a contact is opened, a blower switch 2 is cut off, and a blower is stopped. A four-way selector valve 5 is changed over, defrosting is started, and a time-limit relay 4 is fed with power for continuing the defrosting. When the decier DS has returned and the water temperature is high, the pressure rises, a high- pressure pressure switch HP2 operates, power is fed to the switch 2 to drive the blower, the valve 5 is changed over, defrosting is finished, and heating is started. When the water temperature is low and a predetermined time has passed without rise in the pressure, the relay 4 operates, the switch 2 is fed with power to drive the blower, the valve 5 is changed over, defrosting is finished, and heating is started.
COPYRIGHT: (C)1979,JPO&Japio
JP6232678A 1978-05-26 1978-05-26 Defrosting control circuit for air-cooled heat pump type chiller unit Pending JPS54154145A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6232678A JPS54154145A (en) 1978-05-26 1978-05-26 Defrosting control circuit for air-cooled heat pump type chiller unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6232678A JPS54154145A (en) 1978-05-26 1978-05-26 Defrosting control circuit for air-cooled heat pump type chiller unit

Publications (1)

Publication Number Publication Date
JPS54154145A true JPS54154145A (en) 1979-12-05

Family

ID=13196892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6232678A Pending JPS54154145A (en) 1978-05-26 1978-05-26 Defrosting control circuit for air-cooled heat pump type chiller unit

Country Status (1)

Country Link
JP (1) JPS54154145A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57182041A (en) * 1981-04-30 1982-11-09 Sharp Corp Heat pump type air conditioner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57182041A (en) * 1981-04-30 1982-11-09 Sharp Corp Heat pump type air conditioner
JPS6134054B2 (en) * 1981-04-30 1986-08-05 Sharp Kk

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