JPH0478474U

JPH0478474U -

Info

Publication number: JPH0478474U
Application number: JP11930590U
Authority: JP
Priority date: 1990-11-16
Filing date: 1990-11-16
Publication date: 1992-07-08

Description

[Brief explanation of drawings]

第１図は本考案の第１実施例に係る空気調和機
の冷凍サイクル図、第２図は第１実施例の圧縮機
１，２の油面及び均油・均圧管の関係を示した図
でａはその拡大図、ｂはａの囲いｂの拡大図、第
３図は第１実施例に係るマルチタイプの空気調和
機の制御ブロツク図、第４図は本考案の第２実施
例に係る冷凍サイクル図、第５図は従来例の冷凍
サイクル図である。１，２……圧縮機、７，８，９……アキユムレ
ータ、５５……逆止弁、５６，５８……オイルセ
パレータ、５７，５９……油戻し管、５１……均
圧管、５２，５４……電磁弁、５３……均油管、
６０……電磁弁、６１……連通管、６２……吸入
管、６３……減圧用キヤピラリ。 Fig. 1 is a refrigeration cycle diagram of an air conditioner according to the first embodiment of the present invention, and Fig. 2 is a diagram showing the relationship between oil levels and oil equalization/pressure equalization pipes of compressors 1 and 2 of the first embodiment. 3 is a control block diagram of the multi-type air conditioner according to the first embodiment, and FIG. 4 is an enlarged view of the enclosure b of a. Such a refrigeration cycle diagram, FIG. 5, is a refrigeration cycle diagram of a conventional example. 1, 2... Compressor, 7, 8, 9... Accumulator, 55... Check valve, 56, 58... Oil separator, 57, 59... Oil return pipe, 51... Pressure equalization pipe, 52, 54 ... Solenoid valve, 53 ... Oil equalizing pipe,
60... Solenoid valve, 61... Communication pipe, 62... Suction pipe, 63... Capillary for pressure reduction.

Claims

[Scope of utility model registration request]

A multi-type air conditioner comprising an outdoor unit having multiple compressors connected in parallel and multiple indoor units, and controlling the number of operating compressors and operating frequency of each compressor according to the required capacity of these indoor units. , an oil equalizing pipe and a pressure equalizing pipe that connect the compressors connected in parallel, a solenoid valve that is interposed in the middle of each of the equalizing oil pipe and the pressure equalizing pipe and can be controlled according to the operating state, and the pressure equalizing pipe and the compressor. 1. An air conditioner comprising a communication pipe that communicates with a suction pipe of the air conditioner and has a depressurization capillary and a solenoid valve that can be controlled according to operating conditions in the middle of the communication pipe.