JPS5486839A - Heating/cooling device - Google Patents

Heating/cooling device

Info

Publication number
JPS5486839A
JPS5486839A JP15443377A JP15443377A JPS5486839A JP S5486839 A JPS5486839 A JP S5486839A JP 15443377 A JP15443377 A JP 15443377A JP 15443377 A JP15443377 A JP 15443377A JP S5486839 A JPS5486839 A JP S5486839A
Authority
JP
Japan
Prior art keywords
frost
outdoor
output
heat exchanger
heating
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
JP15443377A
Other languages
Japanese (ja)
Inventor
Yasuyoshi Hamada
Fumio Harada
Kensaku Kokuni
Takao Chiaki
Hiroshi Yasuda
Noritada Kato
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 JP15443377A priority Critical patent/JPS5486839A/en
Publication of JPS5486839A publication Critical patent/JPS5486839A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To put an air-cooled heat pump type air conditioner into defrost operation only when frost is actually developed.
CONSTITUTION: During the heating operation of an air-cooled heat pump type air conditioner, refrigerant discharged from a compressor 1 is circulated through a 4-way valve 2, indoor heat exchanger 3, check valve 4, reducing device 6 for heating, outdoor heat exchanger 8, 4-way valve 2 and accumulator 9 and returns to the compressor 1. The output of a temperature sensor 10 attached to the outdoor heat exchanger 8 on which frost is developed during the heating operation as the outdoor temperature declines and the output of a temperature sensor 17 for sensing an outdoor dry bulb are put in a multiplexer 11, and its output is sent through an AD converter 12 to an operation control unit 13 which actuates a defrost system through a relay 16 after discriminating the development of frost.
COPYRIGHT: (C)1979,JPO&Japio
JP15443377A 1977-12-23 1977-12-23 Heating/cooling device Pending JPS5486839A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15443377A JPS5486839A (en) 1977-12-23 1977-12-23 Heating/cooling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15443377A JPS5486839A (en) 1977-12-23 1977-12-23 Heating/cooling device

Publications (1)

Publication Number Publication Date
JPS5486839A true JPS5486839A (en) 1979-07-10

Family

ID=15584070

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15443377A Pending JPS5486839A (en) 1977-12-23 1977-12-23 Heating/cooling device

Country Status (1)

Country Link
JP (1) JPS5486839A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538518A1 (en) * 1982-12-22 1984-06-29 Elf Aquitaine METHOD AND DEVICE FOR MONITORING AND CONTROLLING A EVAPORATOR

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538518A1 (en) * 1982-12-22 1984-06-29 Elf Aquitaine METHOD AND DEVICE FOR MONITORING AND CONTROLLING A EVAPORATOR

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