Refrigerating apparatus
A technology for refrigeration equipment and refrigeration oil, which is applied to refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of low flow rate of gas refrigerant, inability to wash away mineral oil and foreign objects, and no consideration of cleaning operation status, etc. Achieving the effect of preventing trouble and reducing residual amount
Inactive Publication Date: 2008-04-16
DAIKIN IND LTD
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AI Technical Summary
Problems solved by technology
[0008] However, in existing refrigerating devices, the operation status during the cleaning work is not taken into consideration
Therefore, there is also a concern that in some operating conditions, the flow rate of the gas refrigerant in the connecting pipe on the gas side is too low, and the mineral oil and foreign matter cannot be washed away, and the mineral oil and foreign matter remain in the connecting pipe. be the cause of trouble
Method used
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Embodiment Construction
[0037] Embodiments of the present invention will be described in detail below with reference to the drawings.
[0038] (Embodiment 1 of the invention)
[0039] Such as figure 1 As shown, the air conditioner of this embodiment is provided with one outdoor unit 20 and one indoor unit 30 . The outdoor unit 20 and the indoor unit 30 are for HFC refrigerant. The outdoor unit 20 constitutes the refrigeration system according to the present invention.
[0040] The outdoor unit 20 and the indoor unit 30 are connected to each other by the liquid-side connecting pipe 60 and the gas-side connecting pipe 70 previously established for connecting the outdoor unit for CFC refrigerant or HCFC refrigerant and the indoor unit. In the air conditioner of this embodiment, the refrigerant circuit 10 is formed by connecting the outdoor circuit 11 of the outdoor unit 20 and the indoor circuit 12 of the indoor unit 30 with the existing liquid-side connecting pipe 60 and gas-side connecting pipe 70 ...
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A refrigerating apparatus, wherein the capacity of a compressor (21) is set based on a Froude number Fr during the washing operation. The Froude number represents the ratio of the inertia force of a gas refrigerant flowing in a gas side communication tube (70) to a gravity acting on a fluid in the gas side communication tube (70). During the washing operation, the capacity of the compressor (21) is set so that the Froude number Fr is equal to or larger than 1, and the inertia force of the gas refrigerant flowing in the gas side communication tube (70) becomes larger than the gravity acting on the fluid containing mineral oils and foreign matters in the gas side communication tube (70). Accordingly, the fluid containing the mineral oils and foreign matters is pushed up by the gas refrigerant also at the vertical portion of the gas side communication tube (70). Thus, the mineral oils and foreign matters remaining in an existing fluid side communication tube (60) and the gas side communication tube (70) can be collected.
Description
technical field [0001] The invention relates to a refrigerating device which is connected to an existing connecting pipeline and cleans the connecting pipeline. Background technique [0002] Conventionally, refrigerating apparatuses having a refrigerant circuit that performs a vapor compression refrigeration cycle through a refrigerant cycle have been known. The refrigerating device is composed of indoor and outdoor units, which are connected to each other by connecting pipes. Most of the connecting pipes are buried inside the building. Therefore, it is difficult to replace the connecting pipe when updating the refrigeration device, and the existing connection pipe is continued to be used to introduce a new refrigeration device. [0003] The CFC refrigerants and HCFC refrigerants that have been used so far as refrigerants filled in the refrigerant circuit have been completely discontinued because of adverse effects on the environment such as destruction of the ozone layer....
Claims
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IPC IPC(8): F25B45/00
Inventor 吉见敦史吉见学水谷和秀松冈弘宗
Owner DAIKIN IND LTD