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Refrigeration cycle apparatus

A refrigeration cycle and equipment technology, applied in the field of refrigeration cycle equipment, can solve the problems of high cost and high price

Active Publication Date: 2006-03-22
TOSHIBA CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to provide electronic valves which are high in number corresponding to the price of the compressors, thereby involving higher costs

Method used

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  • Refrigeration cycle apparatus
  • Refrigeration cycle apparatus
  • Refrigeration cycle apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0021] The refrigeration cycle apparatus 1 includes an air conditioner composed of an outdoor unit 2 and an indoor unit 3 . The outdoor unit 2 includes compressors 4a, 4b, oil separator 7, four-way valve 9, outdoor heat exchanger 10, liquid container 11, accumulator 16, outdoor fan 20, outdoor control section 50, inverters 51, 52, and the like. The indoor unit 3 includes an electronic expansion valve 13, an indoor heat exchanger 14, an indoor fan 30, an indoor control section (not shown), and the like. The outdoor unit 2 and the indoor unit 3 are connected by a liquid pipe 12 and a gas pipe 15.

[0022] The outdoor control section 50 controls the operation of the outdoor unit 2 . The converters 51 and 52 rectify the voltage of the commercial AC power source 53, and convert the rectified voltage into an AC voltage of a frequency corresponding to the structure of the outdoor control section 50 and output it. Compressors 4 a and 4 b are of the variable capacity type and are dri...

no. 3 example

[0061] Such as image 3 As shown, the air conditioner includes a plurality of outdoor units 2 a, 2 b and a plurality of indoor units 3 . The outdoor unit 2a has the same structure as the outdoor unit 2 of the second embodiment and has compressors 4a, 4b. The outdoor unit 2b has the same structure as the outdoor unit 2 of the second embodiment and has compressors 4a, 4b.

[0062] Parallel to the capillary 48 in the bypass pipe 47, a first on / off valve V1 is connected to each outdoor unit 2a, 2b.

[0063] For each outdoor unit 2a, 2b, a third oil balance pipe 61 is connected from the bottom of the oil tank 60 to the low pressure side pipe 17. Second and third on / off valves V2 and V3 are provided at the oil balance pipe 61 . Also, a series circuit of the capillary 33 and the one-way valve 34 is connected in parallel with the on / off valve V2 in the oil balance pipe 61 .

[0064] The balance pipe 31 is connected between those interconnections at a position between the on / off val...

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Abstract

An extra portion of oil (L) in compressors (4a, 4b) is gathered in a buffer tank (44) through oil equalizing pipes (41a, 41b), respectively. The oil (L) is then distributed from the buffer tank (44) to the compressor (4a, 4b), and the pressures of refrigerants discharged from the compressors (4a, 4b) are applied to the buffer tank (44) through a bypass pipe (47).

Description

technical field [0001] The present invention relates to a refrigerating cycle equipment equipped with a plurality of high-pressure type compressors having a casing holding oil. Background of the invention [0002] In refrigeration cycle equipment, a plurality of high-pressure type compressors are provided with a casing holding lubricating oil, wherein discharge pipes and suction pipes of these compressors are connected to each other. In the prior art, there is an imbalance between the amount of lubricating oil discharged from each compressor and the amount of lubricating oil returned to the corresponding compressor in a state of being mixed with refrigerant, and sometimes compressor oil lack of. If this oil shortage occurs, the oil is interrupted in the sliding portion of the compressor, which has a bad influence on the service life of the compressor. [0003] In order to deal with this undesirable situation, refrigeration cycle equipment has been proposed (for example, Ja...

Claims

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Application Information

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IPC IPC(8): F25B1/00F25B13/00F25B31/00
CPCF25B2700/03F25B2400/0401Y02B30/741F25B13/00F25B2500/06F25B2313/0233F25B2313/006F25B2600/021F25B2400/075F25B2313/0253F25B31/004F25B2700/2105Y02B30/70F25B1/00F25B43/04F25B49/02
Inventor 上野圣隆
Owner TOSHIBA CARRIER CORP
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