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Air conditioning device

一种空调装置、气侧的技术，应用在空间供热和通风、加热方式、照明和加热设备等方向，能够解决冷冻机油贮存量减少、压缩机润滑不良等问题，达到抑制润滑不良的效果

Active Publication Date: 2017-09-26
DAIKIN IND LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, part of the refrigerating machine oil that has flowed out into the refrigerant circuit does not return to the compressor, and if the operation is continued, the amount of refrigerating machine oil stored in the compressor will decrease.
Moreover, if the storage capacity of the refrigerating machine oil is less than a certain amount, poor lubrication of the compressor is prone to occur.

Method used

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other Embodiment approach

[0113] The above-described embodiments may also take the following configurations.

[0114] For example, in the above-mentioned embodiments, an example in which the present invention is applied to an air conditioner capable of energy-saving operation with variable target values ​​of evaporating temperature and condensing temperature has been described, but even if the target values ​​are fixed If the device calculates the amount of oil retention in the branch pipe after applying the present invention, it can also perform oil recovery operation at an accurate time. For example, after the local air conditioner is installed, the air conditioner can select the target evaporation temperature during cooling from 5, 7, 9, 11, and 13 degrees. If 13 degrees is selected as the target evaporation temperature, as long as the application According to the present invention, the amount of oil retention in the branch pipe is calculated, so that the oil recovery operation can be performed at a...

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Abstract

Provided is an air conditioning device (10) in which an outdoor unit (20) and a plurality of indoor units (40) are connected and wherein the accumulated amount of refrigeration oil in gas-side main piping (72a) is calculated when the gas refrigerant flow rate in the gas-side main piping (72a) is slower than a main pipe flow rate lower threshold value, the accumulated amount of oil in gas-side branch piping (72b) is calculated if the gas refrigerant flow rate of the gas-side main piping (72a) is faster than the main pipe flow rate lower threshold value but slower than a branch pipe flow rate lower threshold value, and, if the total value of said accumulated amounts surpasses a set amount, oil recovery operation is carried out so that oil recovery is performed at an appropriate timing and defective lubrication is prevented in a compressor (21).

Description

technical field [0001] The present invention relates to an air conditioner connected with an outdoor unit and a plurality of indoor units, and particularly relates to the following air conditioner: when the cumulative value of the retention of refrigerating machine oil in the refrigerant pipeline exceeds the set value , the air conditioner performs an oil recovery operation in which the refrigerating machine oil in the refrigerant circuit is recovered into the compressor. Background technique [0002] Hitherto, as an air conditioner installed in a building having a plurality of rooms, the following air conditioner is widely known. In this air conditioner, an outdoor unit is connected to a plurality of indoor units to perform A refrigerant circuit of a vapor compression refrigeration cycle (for example, refer to Patent Document 1). [0003] When the compressor on the refrigerant circuit is started, part of the refrigerating machine oil stored in the compressor for lubricatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F24F11/02F25B13/00
CPCF25B13/00F25B49/02F25B2313/0314F25B2313/0315F25B2700/1931F25B2700/1933F25B2700/21151F25B2700/21152F25B2400/19F24F11/89F25B43/02F25B2700/13
Inventor 大浦龙太冈祐辅南淳哉
Owner DAIKIN IND LTD
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