Amended Claims [Claim 1] A refrigerating cycle apparatus (10) comprising:
a refrigerant circuit (11a, lib) to which a compressor (12), a first heat exchanger (14), an expansion mechanism (15), and a second heat exchanger (16) are connected and in which a refrigerant containing 1,1,2-trifruoroethylene circulates; and
a control mechanism to control pressure of the refrigerant in a flow path of the refrigerant circuit (11a, 1 lb) from the compressor (12) to the expansion mechanism (15) to be not more than a threshold value. [Claim 2] The refrigerating cycle apparatus (10) according to claim 1,
wherein the control mechanism reduces a number of rotations of an electric motor element (40) of the compressor (12) when the pressure of the refrigerant in the flow path of the refrigerant circuit (11a, lib) from the compressor (12) to the expansion mechanism (15) reaches a first value of not less than 4 MPa and not more than 5 MPa. [Claim 3] The refrigerating cycle apparatus (10) according to claim 1 or 2,
wherein the control mechanism includes, in the compressor (12), a bypass valve (94) to open a flow path of the refrigerant for bypassing a compression element
(30) of the compressor (12) when a pressure difference of the refrigerant before and
after being compressed by the compression element (30) of the compressor (12) reaches
a second value.
[Claim 4] The refrigerating cycle apparatus (10) according to claim 3,
wherein the compression element (30) of the compressor (12) includes a cylinder (31) to suction the refrigerant into a cylinder chamber inside of the cylinder
(31) from the refrigerant circuit (11a, lib) and to compress the refrigerant in the
cylinder chamber, and a discharge muffler (35) to discharge the refrigerant compressed
by the cylinder (31) to a space in a container (20) of the compressor (12), and

wherein the bypass valve (94) makes a path through which the refrigerant is suctioned into the cylinder chamber within the cylinder (31), and the discharge muffler (35) to communicate with each other when the pressure difference of the refrigerant before and after being compressed by the compression element (30) of the compressor (12) reaches the second value. [Claim 5] The refrigerating cycle apparatus (10) according to claim 3 or 4,
wherein the second value is a value of not less than 3.5 MPa and not more than 4.5 MPa. [Claim 6] The refrigerating cycle apparatus (10) according to claim 1 or 2,
wherein the control mechanism includes a bypass valve (93) connected to the refrigerant circuit (11a, 1 lb), the bypass valve (93) opening a flow path of the refrigerant for bypassing the compressor (12) when a pressure difference of the refrigerant before and after being compressed by the compressor (12) reaches a second value of not less than 3.5 MPa and not more than 4.5 MPa. [Claim 7] The refrigerating cycle apparatus (10) according to any one of claims 1 to 6,
wherein the control mechanism stops power supply to an electric motor element (40) of the compressor (12) when the pressure of the refrigerant in the flow path of the refrigerant circuit (11a, lib) from the compressor (12) to the expansion mechanism (15) reaches a third value. [Claim 8] The refrigerating cycle apparatus (10) according to claim 7,
wherein the control mechanism includes, in the compressor (12), a pressure fuse (95) to shut off electric conduction between the electric motor element (40) of the compressor (12) and an external power supply when the pressure of the refrigerant in the flow path of the refrigerant circuit (11a, lib) from the compressor (12) to the expansion mechanism (15) reaches the third value.

[Claim 9] The refrigerating cycle apparatus (10) according to claim 8,
wherein the pressure fuse (95) is disposed in a container (20) of the
compressor (12).
[Claim 10] The refrigerating cycle apparatus (10) according to any one of claims 7 to 9, wherein the third value is a value of not less than 5 MPa and not more than 6
MPa.
[Claim 11] The refrigerating cycle apparatus (10) according to any one of claims 1 to
10,
wherein the control mechanism includes, on the compressor (12), a relief
valve (96) for ejecting the refrigerant outside a container (20) of the compressor (12),
and opens the relief valve (96) when the pressure of the refrigerant in the flow path of
the refrigerant circuit (11a, lib) from the compressor (12) to the expansion mechanism
(15) reaches a fourth value of not less than 5.5 MPa and not more than 6.5 MPa.
[Claim 12] The refrigerating cycle apparatus (10) according to any one of claims 1 to
11,
wherein the refrigerant is 1,1,2-trifluoroethylene. [Claim 13] The refrigerating cycle apparatus (10) according to any one of claims 1 to 11,
wherein the refrigerant is a mixture containing 1% or more of 1,1,2-trifluoro ethylene.