Patent ID: 8807444
Filing Date: 2014-08-19
Classification: F24F

Abstract:
1. An air conditioning equipment, comprising: a first refrigerant pipe and a second refrigerant pipe; an in-room unit connected to one end of the first refrigerant pipe and one end of the second refrigerant pipe; and an out-room unit connected to an other end of the first refrigerant pipe and an other end of the second refrigerant pipe, wherein the first and second refrigerant pipes include signal coupling portions which are respectively disposed at first and second end parts of the refrigerant pipes, and each of which couples an AC control signal to respective metal parts of the first and second refrigerant pipes at a distance λ/4 of a wavelength λ of the AC control signal from respective refrigerant-pipe derivation parts of the in-room unit or the out-room unit whereby an impedance at the distance λ/4 becomes infinity.