Air conditioner

A technology for an air conditioner and a refrigerant circuit, which is applied in the field of air conditioners and can solve problems such as a decrease in heating capacity

Active Publication Date: 2011-11-02
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in such a method, for example, when the air conditioner is in the heating operation, it is necessary to temporarily switch to the cooling operation only to recover the refrigerating machine oil, and then return to the heating operation after the refrigerating machine oil is recovered. There is a problem that the heating capacity drops significantly

Method used

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Embodiment Construction

[0067] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the above-described embodiments are merely examples that are preferable in nature. These embodiments do not limit the present invention, the application object of the present invention, or the use of the present invention.

[0068] (the whole frame)

[0069] figure 1 It is a refrigerant circuit diagram showing the overall configuration of the air conditioner according to the embodiment of the present invention. Such as figure 1 As shown, a refrigerant circuit R is configured in the air conditioner according to the present invention. Two first and second indoor units 40A, 40B and one outdoor unit 20 connected side by side are connected to each other through the first and second BS units 30A, 30B through the high-pressure gas pipeline 11, the low-pressure gas pipeline 12 and the liquid pipeline 13. When connected together, the refrigerant circuit R is cons...

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PUM

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Abstract

An air conditioner in which, when a value calculated in heating operation by an oil amount calculation section (51) is more than or equal to a predetermined value, a frequency control section (52) of a controller (50) increases the frequency of operation of a compressor (21) in order to recover refrigeration machine oil in a refrigerant circuit (R).

Description

technical field [0001] The present invention relates to an air conditioner, in particular to a technique for recovering refrigerating machine oil remaining in a refrigerant circuit to a compressor. Background technique [0002] Conventionally, a refrigerating apparatus that performs a refrigeration cycle by circulating a refrigerant in a refrigerant circuit is known, and applications of the refrigerating apparatus are expanding to air conditioners and the like. For example, the air conditioner disclosed in Patent Document 1 uses a so-called hermetic compressor. In the hermetic compressor, the compressor and the motor are housed in one housing. Furthermore, in this hermetic compressor, an oil supply passage is formed on the drive shaft of the compression mechanism, and the refrigerating machine oil stored at the bottom of the casing is supplied to the compression mechanism through the oil supply passage. [0003] Patent Document 1: Japanese Laid-Open Patent Publication No. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B1/00F25B43/02
CPCF25B2500/19F25B31/004F25B2600/021Y02B30/741F25B2600/2509Y02B30/70
Inventor 河野聪松冈慎也
Owner DAIKIN IND LTD
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