Refrigerant cycle device with ejector
First Claim
1. A refrigerant cycle device comprising:
- a compressor that sucks in and compresses refrigerant;
a radiator located to cool high-pressure hot gas refrigerant discharged from the compressor;
an ejector that has a nozzle section for decompressing and expanding refrigerant downstream of the radiator, a refrigerant suction port for sucking in refrigerant by a high-speed flow of refrigerant jetted from the nozzle section, and a pressurizing section for mixing and pressurizing the refrigerant jetted at high speed and the refrigerant sucked through the refrigerant suction port;
a first evaporator for evaporating refrigerant flowing out of the ejector;
a first passage portion for guiding refrigerant to the refrigerant suction port;
a throttle unit that is located in the first passage portion and decompresses the refrigerant flowing in the first passage portion;
a second evaporator that is located in the first passage portion downstream of the throttle unit in a refrigerant flow to evaporate refrigerant;
a bypass passage portion for guiding the hot gas refrigerant discharged from the compressor into the second evaporator;
a bypass opening and closing unit that is provided in the bypass passage portion to open and close the bypass passage portion, the bypass opening and closing unit having a throttling open degree when being opened;
a second passage portion that is branched from the bypass passage portion downstream of the bypass opening and closing unit in a refrigerant flow, wherein the hot gas refrigerant in the bypass passage portion flows to the first evaporator through the second passage portion; and
a first flow control unit that is provided in the second passage portion to prevent a flow of refrigerant from a side of the first evaporator to a side of the second evaporator through the second passage portion.
1 Assignment
0 Petitions
Accused Products
Abstract
A refrigerant cycle device having an ejector includes a first evaporator for evaporating refrigerant flowing out of the ejector, a first passage portion for guiding refrigerant to a refrigerant suction port of the ejector, a throttle unit located in the first passage portion, a second evaporator located in the first passage portion downstream of the throttle unit, a bypass passage portion for guiding hot gas refrigerant from a compressor into the second evaporator, a bypass opening and closing unit provided in the bypass passage portion. Furthermore, a second passage portion is branched from the bypass passage portion downstream of the bypass opening and closing unit, and a flow control unit is provided in the second passage portion to prevent a flow of refrigerant from the first evaporator to the second evaporator through the second passage portion. Therefore, defrosting of both the first and second evaporators can be suitably performed.
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Citations
22 Claims
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1. A refrigerant cycle device comprising:
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a compressor that sucks in and compresses refrigerant; a radiator located to cool high-pressure hot gas refrigerant discharged from the compressor; an ejector that has a nozzle section for decompressing and expanding refrigerant downstream of the radiator, a refrigerant suction port for sucking in refrigerant by a high-speed flow of refrigerant jetted from the nozzle section, and a pressurizing section for mixing and pressurizing the refrigerant jetted at high speed and the refrigerant sucked through the refrigerant suction port; a first evaporator for evaporating refrigerant flowing out of the ejector; a first passage portion for guiding refrigerant to the refrigerant suction port; a throttle unit that is located in the first passage portion and decompresses the refrigerant flowing in the first passage portion; a second evaporator that is located in the first passage portion downstream of the throttle unit in a refrigerant flow to evaporate refrigerant; a bypass passage portion for guiding the hot gas refrigerant discharged from the compressor into the second evaporator; a bypass opening and closing unit that is provided in the bypass passage portion to open and close the bypass passage portion, the bypass opening and closing unit having a throttling open degree when being opened; a second passage portion that is branched from the bypass passage portion downstream of the bypass opening and closing unit in a refrigerant flow, wherein the hot gas refrigerant in the bypass passage portion flows to the first evaporator through the second passage portion; and a first flow control unit that is provided in the second passage portion to prevent a flow of refrigerant from a side of the first evaporator to a side of the second evaporator through the second passage portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A refrigerant cycle device comprising:
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a compressor that sucks in and compresses refrigerant; a radiator located to cool high-pressure hot gas refrigerant discharged from the compressor; an ejector that has a nozzle section for decompressing and expanding refrigerant downstream of the radiator, and a refrigerant suction port for sucking in refrigerant by a high-speed flow of refrigerant jetted from the nozzle section; a first evaporator for evaporating refrigerant flowing out of the ejector; a branch passage portion branched from an upstream side of the nozzle section and joined to the refrigerant suction port of the ejector; a throttle unit that is located in the branch passage portion and decompresses the refrigerant flowing in the branch passage portion; a second evaporator that is located in the branch passage portion downstream of the throttle unit in a refrigerant flow; a bypass passage portion for guiding the hot gas refrigerant discharged from the compressor into the second evaporator; and a bypass opening and closing unit that is located in the bypass passage portion to open and close the bypass passage portion, wherein the first evaporator and the second evaporator are constituted such that a flow resistance of refrigerant flowing in the second evaporator is greater than that of refrigerant flowing in the first evaporator. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification