초록 ▼

A refrigeration cycle that controls the deposit of foreign matter at inlet or outlet of a capillary tube, which forms an expansion device in the refrigeration, regardless of changeover from a cooling operation to a heating operation. In particular, in a refrigeration cycle using an alternative refri

A refrigeration cycle that controls the deposit of foreign matter at inlet or outlet of a capillary tube, which forms an expansion device in the refrigeration, regardless of changeover from a cooling operation to a heating operation. In particular, in a refrigeration cycle using an alternative refrigerant, a junction is provided for joining an end of a capillary tube forming an expansion device to the piping through which the refrigerant flows. The junction has a slope defined by the inside diameter thereof, which gradually decreases from the side of the junction that joins the piping to the side of the junction that joined the capillary tube. An end portion of the capillary tube projectsinto the junction at the piping side. The projecting end of the capillary tube is opened obliquely to the axial line of the capillary tube. A hole is formed in the peripheral wall of the projecting end of the capillary tube. According to such an arrangement, foreign matter in the refrigerant is forced to be deposited in portions of the refrigerant cycle other than the capillary tube and prevented from clogging the capillary tube.

대표청구항 ▼

[ What is claimed is:] [19.] A refrigeration cycle for suppressing the deposit of foreign matter in a refrigeration cycle, said refrigeration cycle comprising:a compressor;a condenser;an expansion device having a capillary tube;an evaporator; andpiping connecting said compressor, said condenser, sai

[ What is claimed is:] [19.] A refrigeration cycle for suppressing the deposit of foreign matter in a refrigeration cycle, said refrigeration cycle comprising:a compressor;a condenser;an expansion device having a capillary tube;an evaporator; andpiping connecting said compressor, said condenser, said expansion device, and said evaporator in a loop for circulating a refrigerant in said compressor, said condenser, said expansion device, said evaporator, and said piping,wherein said refrigerant is a compound not containing chlorine atoms in its chemical formula and an oil that has a lubricating performance,said expansion device includes a capillary tube, and connecting means for connecting said capillary tube and said piping, with an end portion of said capillary tube projecting inside of said connecting means, andwherein a space is formed between an inner surface of said connecting means and an outer surface of said capillary tube projecting inside of said connecting means, so that said foreign matter mixed or precipitated in the refrigerant may be deposited in said space, and said deposition of said foreign matter in said capillary tube is prevented.