Ejector type refrigerating cycle

An ejector type refrigerating cycle comprising:

• a compressor for sucking refrigerant and compressing the same;
• a heat radiating device for radiating heat from high-pressure refrigerant pumped out from the compressor;
• an expansion valve provided in a refrigerant passage on an outlet side of the heat radiating device for controlling condition of low-pressure refrigerant at the inlet side of the compressor by adjusting a passage opening area of the refrigerant passage;
• an ejector having a nozzle portion for depressurizing and expanding the refrigerant from the expansion valve, a suction port for sucking the refrigerant by high speed refrigerant flow ejected from the nozzle portion, and a pressure increasing portion for mixing the high speed refrigerant ejected from the ejector nozzle with the refrigerant sucked from the suction port and for increasing fluid pressure of the refrigerant while converting the speed energy of the refrigerant to pressure energy;
• a first vaporizing device for evaporating the refrigerant from the ejector to perform a cooling operation;
• a bypass passage bifurcated at an inlet side of the ejector for supplying a part of the refrigerant from the expansion valve to the suction port of the ejector;
• a restricting device provided in the bypass passage for depressurizing the part of the refrigerant from the expansion valve;
• a second vaporizing device provided in the bypass passage at an outlet side of the restricting device for evaporating the refrigerant to perform a cooling operation;
• and
• an internal heat exchanger for carrying out heat exchange between low-pressure refrigerant on the inlet side of the compressor and high-pressure refrigerant on an inlet side of the expansion valve, or between the low-pressure refrigerant on the inlet side of the compressor and intermediate-pressure refrigerant on an outlet side of the expansion valve.

An ejector type refrigerating cycle comprising:

• a first refrigerating circuit including;
• a compressor for compressing gas phase refrigerant and pumping out compressed high-pressure refrigerant;
• a heat radiating device connected to an outlet side of the compressor for cooling down the high-pressure refrigerant;
• an ejector having an inlet port, an outlet port and a suction port, in which the inlet port of the ejector is connected to an outlet side of the heat radiating device, the ejector further having a nozzle portion for depressurizing and expanding the refrigerant from the heat radiating device, wherein the outlet port mixes the high speed refrigerant ejected from the nozzle portion with the refrigerant sucked from the suction port and increases fluid pressure of the refrigerant while converting the speed energy of the refrigerant to the pressure energy;
• and
• a first vaporizing device connected at its inlet side to the outlet port of the ejector, and at its outlet side to the inlet side of the compressor;
• a second refrigerating circuit including;
• the compressor;
• the heat radiating device;
• a bypass passage bifurcated from the inlet side of the ejector and connected to the suction port of the ejector;
• a second vaporizing device provided in the bypass passage;
• and
• the first vaporizing device;
• and
• an internal heat exchanger having high-pressure side and low-pressure side refrigerant passages, wherein the high-pressure side refrigerant passage is provided between the outlet side of the heat radiating device and the inlet port of the ejector, and/or between the outlet side of the heat radiating device and the inlet side of the second vaporizing device, whereas the low-pressure side refrigerant passage is provided between the outlet side of the first vaporizing device and the inlet side of the compressor.

An ejector type refrigerating cycle comprising:

• a first refrigerating circuit including;
• a compressor for compressing gas phase refrigerant and pumping out compressed high-pressure refrigerant;
• a heat radiating device connected to an outlet side of the compressor for cooling down the high-pressure refrigerant;
• an expansion valve arranged at the outlet side of the heat radiating device for depressurizing the refrigerant from the heat radiating device;
• an ejector having an inlet port, an outlet port and a suction port, in which the inlet port of the ejector is connected to an outlet side of the expansion valve, the ejector further having a nozzle portion for depressurizing and expanding the refrigerant from the expansion valve, wherein the outlet port mixes the high speed refrigerant ejected from the nozzle portion with the refrigerant sucked from the suction port and increases fluid pressure of the refrigerant while converting the speed energy of the refrigerant to the pressure energy;
• and
• a first vaporizing device connected at its inlet side to the outlet port of the ejector, and at its outlet side to the inlet side of the compressor;
• a second refrigerating circuit including;
• the compressor;
• the heat radiating device;
• the expansion valve;
• a bypass passage bifurcated from the inlet side of the ejector and connected to the suction port of the ejector;
• a second vaporizing device provided in the bypass passage;
• and
• the first vaporizing device;
• and
• an internal heat exchanger having intermediate-pressure side and low-pressure side refrigerant passages, wherein the intermediate-pressure side refrigerant passage is provided between the outlet side of the expansion valve and the inlet side of the second vaporizing device, whereas the low-pressure side refrigerant passage is provided between the outlet side of the first vaporizing device and the inlet side of the compressor.

An ejector type refrigerating cycle comprising:

• a first refrigerating circuit including;
• a compressor for compressing gas phase refrigerant and pumping out compressed high-pressure refrigerant;
• a heat radiating device connected to an outlet side of the compressor for cooling down the high-pressure refrigerant;
• an expansion valve arranged at the outlet side of the heat radiating device for depressurizing the refrigerant from the heat radiating device;
• an ejector having an inlet port, an outlet port and a suction port, in which the inlet port of the ejector is connected to an outlet side of the expansion valve, the ejector further having a nozzle portion for depressurizing and expanding the refrigerant from the expansion valve, wherein the outlet port mixes the high speed refrigerant ejected from the nozzle portion with the refrigerant sucked from the suction port and increases fluid pressure of the refrigerant while converting the speed energy of the refrigerant to the pressure energy;
• and
• a first vaporizing device connected at its inlet side to the outlet port of the ejector, and at its outlet side to the inlet side of the compressor;
• a second refrigerating circuit including;
• the compressor;
• the heat radiating device;
• the expansion valve;
• a bypass passage bifurcated from the inlet side of the ejector and connected to the suction port of the ejector;
• a second vaporizing device provided in the bypass passage;
• and
• the first vaporizing device;
• and
• an internal heat exchanger having intermediate-pressure side and low-pressure side refrigerant passages, wherein the intermediate-pressure side refrigerant passage is provided between the outlet side of the expansion valve and the inlet port of the ejector and between the outlet side of the expansion valve and the inlet side of the second vaporizing device, whereas the low-pressure side refrigerant passage is provided between the outlet side of the first vaporizing device and the inlet side of the compressor.

An ejector type refrigerating cycle comprising:

• a first refrigerating circuit including;
• a compressor for compressing gas phase refrigerant and pumping out compressed high-pressure refrigerant;
• a heat radiating device connected to an outlet side of the compressor for cooling down the high-pressure refrigerant;
• an expansion valve arranged at the outlet side of the heat radiating device for depressurizing the refrigerant from the heat radiating device;
• an ejector having an inlet port, an outlet port and a suction port, in which the inlet port of the ejector is connected to an outlet side of the expansion valve, the ejector further having a nozzle portion for depressurizing and expanding the refrigerant from the expansion valve, wherein the outlet port mixes the high speed refrigerant ejected from the nozzle portion with the refrigerant sucked from the suction port and increases fluid pressure of the refrigerant while converting the speed energy of the refrigerant to the pressure energy;
• and
• a first vaporizing device connected at its inlet side to the outlet port of the ejector, and at its outlet side to the inlet side of the compressor;
• a second refrigerating circuit including;
• the compressor;
• the heat radiating device;
• the expansion valve;
• a bypass passage bifurcated from the inlet side of the ejector and connected to the suction port of the ejector;
• a second vaporizing device provided in the bypass passage;
• and
• the first vaporizing device;
• and
• an internal heat exchanger having intermediate-pressure side and low-pressure side refrigerant passages, wherein the intermediate-pressure side refrigerant passage is provided between the inlet side of the ejector and the inlet side of the second vaporizing device, whereas the low-pressure side refrigerant passage is provided between the outlet side of the first vaporizing device and the inlet side of the compressor,
• wherein a capillary tube is provided in the bypass passage, an upstream portion of which forms the intermediate-pressure side refrigerant passage of the internal heat exchanger, and
• a downstream portion of the capillary tube is formed at an outside of the internal heat exchanger, so that the refrigerant in the downstream portion is not heat exchanged with the refrigerant in the low-pressure side refrigerant passage of the internal heat exchanger.