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air conditioner

A technology for air conditioners and compressors, which is applied to air conditioning systems, compressors, refrigerators, etc., and can solve problems such as cost impact, inability to cope with changes in compressor operating capacity, changes in the number of operating units, and imbalance

Active Publication Date: 2015-10-21
TOSHIBA CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to avoid the imbalance of oil quantity, it can be considered to set up an electromagnetic switching valve in the oil return circuit, but this will affect the cost
If a capillary is installed in the oil return circuit for the purpose of detecting the oil level, it will not be able to respond to changes in the operating capacity of the compressor and changes in the number of operating units, resulting in a difference in the amount of oil returned

Method used

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Examples

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Embodiment Construction

[0016] Embodiments of the present invention will be described below based on the drawings.

[0017] figure 1 A diagram of the refrigeration cycle of an air conditioner.

[0018] The air conditioner described above is composed of one outdoor unit 1 and a plurality of (here, four) indoor units 2A to 2D.

[0019] A plurality of compressors, ie, a first compressor 3a, a second compressor 3b, and a third compressor 3c, are provided in the above-mentioned outdoor unit 1 . Check valves 5 a to 5 c are provided on discharge refrigerant pipes 4 a to 4 c connected to the respective compressors 3 a to 3 c , and the discharge refrigerant pipes are converged into one refrigerant pipe 6 . In other words, the first compressor 3 a to the first compressor 3 c are connected in parallel to the refrigerant pipe 6 .

[0020] The oil separator 7, the first port Qa and the second port Qb of the four-way valve 8, two outdoor heat exchangers 9a, 9b connected in parallel, and two outdoor expansion va...

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PUM

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Abstract

An air conditioner includes oil balancing pipes (30a to 30c) that extract lubricating oil stored in an oil separator (7) and each of compressors (3a to 3c) in which a specified amount of the lubricating oil or more is stored, a distributor (43) that distributes the lubricating oil led from the oil separator (7) and the compressors (3a to 3c) to a plurality of channels, and oil return pipes (55-57) that communicatively connect the distribution channels of the distributor (43) and a refrigerant inlet pipe of each of the compressors (3a to 3c) to return the lubricating oil to each of the compressors (3a to 3c), wherein the distributor (43) can be fixed easily and reliably by mounting and fixing the distributor (43) to a refrigerant inlet pipe (16) in a horizontal attitude along a horizontal portion of the refrigerant inlet pipe (16) to reduce production variation and also to prevent a pipe fatigue fracture by avoiding pipe stress concentration accompanying the compressors (3a to 3c) being driven.

Description

technical field [0001] The present invention relates to an air conditioner having a refrigerating cycle composed of an outdoor unit having a plurality of compressors and a plurality of indoor units, and particularly relates to an improvement of an oil return structure for equally storing lubricating oil in each compressor. Background technique [0002] There is a type of air conditioner that is best used in buildings with multiple air-conditioned zones. Such an air conditioner includes an oil return circuit formed to take out lubricating oil accumulated in each compressor exceeding a predetermined amount through an oil equalizing pipe, and transfer the taken out lubricating oil to a compressor with insufficient lubricating oil. machine. [0003] In addition, since the high-temperature and high-pressure gas refrigerant discharged from each compressor contains an oil component of lubricating oil, and since there are a plurality of compressors, the amount of lubricating oil di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B1/00F24F1/30F25B41/00F25B41/04
CPCF24F3/065F24F1/26F24F1/30F25B13/00F25B31/004F25B2313/0233F25B2313/0253F25B2313/02741F25B2400/075
Inventor 木口行雄
Owner TOSHIBA CARRIER CORP
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