JPS6446532A - Circuit to protect air conditioner from mistaken connection - Google Patents

Circuit to protect air conditioner from mistaken connection

Info

Publication number
JPS6446532A
JPS6446532A JP62199493A JP19949387A JPS6446532A JP S6446532 A JPS6446532 A JP S6446532A JP 62199493 A JP62199493 A JP 62199493A JP 19949387 A JP19949387 A JP 19949387A JP S6446532 A JPS6446532 A JP S6446532A
Authority
JP
Japan
Prior art keywords
circuit
fuse
indoor unit
contact point
current detection
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
JP62199493A
Other languages
Japanese (ja)
Inventor
Yoshiki Hayata
Motoshi Miyanaka
Takaharu Sato
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 JP62199493A priority Critical patent/JPS6446532A/en
Publication of JPS6446532A publication Critical patent/JPS6446532A/en
Pending legal-status Critical Current

Links

Landscapes

  • Air Conditioning Control Device (AREA)

Abstract

PURPOSE:To make it possible to prevent the breakage of an element even if it is connected by mistake by supplying electric power through a fuse and resistor separately from a control circuit on the side of the indoor unit to a serial circuit consisting of a relay contact point for operation on the side of the indoor unit and electric current detection circuit and a serial circuit consisting of a relay contact point for driving a four-way valve and electric current detection circuit. CONSTITUTION:A serial circuit which includes a relay contact point 7 to operate an air conditioner on the side of the indoor unit 3 and a current detection circuit 17 and a serial circuit which includes the contact point 16 of a relay to drive a four-way valve for switching room cooling and room heating and an electric current detection circuit 17 are connected to the R phase through a fuse 14 and resistor 15. On the other hand, a control circuit 5 on the side of the indoor unit is supplied electric power from the R phase through another fuse 14'. Accordingly if the connection of either a connection line 12 or 13 of the indoor unit 3 and outdoor machine 4 is mistaken, the electric current is restricted by a resistor 15 before either the relay contact point 7 or 16 is welded or the element breakage in the electric current detection circuit 8 or 17 occurs, and, furthermore, the fuse 14 blows. It is, therefore, possible to avoid serious trouble due to a mistaken connection and it can be repaired only by replacing the fuse.
JP62199493A 1987-08-10 1987-08-10 Circuit to protect air conditioner from mistaken connection Pending JPS6446532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62199493A JPS6446532A (en) 1987-08-10 1987-08-10 Circuit to protect air conditioner from mistaken connection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62199493A JPS6446532A (en) 1987-08-10 1987-08-10 Circuit to protect air conditioner from mistaken connection

Publications (1)

Publication Number Publication Date
JPS6446532A true JPS6446532A (en) 1989-02-21

Family

ID=16408730

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62199493A Pending JPS6446532A (en) 1987-08-10 1987-08-10 Circuit to protect air conditioner from mistaken connection

Country Status (1)

Country Link
JP (1) JPS6446532A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112798983A (en) * 2020-12-30 2021-05-14 珠海格力电器股份有限公司 Method and device for detecting connecting line of internal and external machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112798983A (en) * 2020-12-30 2021-05-14 珠海格力电器股份有限公司 Method and device for detecting connecting line of internal and external machines

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