Ejector type refrigerating cycle unit
AssigneeDenso Corporation
InventorsAun Ota, Tomohiko Nakamura, Hideaki Sato
Life of this patent
Estimating the term…
Abstract
A refrigerating cycle unit includes an ejector and a heat exchanger defined by layering a plurality of plates. Each of the plates has a refrigerant passage, and the refrigerant passages are connected by a header tank in a layering direction of the plates. At least two of the plates are fix plates having a fix portion to fix the ejector, and a communication portion through which the ejector and the header tank communicate with each other. The ejector is arranged between the fix portions of the fix plates in the layering direction, so as to be integrated with the heat exchanger.
Claims15
An ejector type refrigerating cycle unit comprising:
- an ejector having a nozzle to inject refrigerant;
- and
- a heat exchanger including
- a plurality of heat exchange plates stacked with each other, each of the plates having a refrigerant passage through which refrigerant flows to exchange heat with air to be conditioned, each of the heat exchange plates having a tank part in fluid communication with the refrigerant passages;
- and
- a header tank defined by the tank parts of adjacent heat exchange plates to connect the refrigerant passages of the plates in a stacked direction of the plates such that the refrigerant passages communicate with each other, wherein
- at least two of the heat exchange plates are fix plates having
- a fix portion to fix an end part of the ejector, and
- a communication portion through which an inside of the ejector and an inside of the header tank communicate with each other, the communication portion having a branch passage which is branched at an upstream side of the nozzle and a decompressor being disposed within the branch passage;
- the ejector is arranged between the fix portions of the fix plates in the stacked direction, so as to be integrated with the heat exchanger;
- the ejector includes
- a nozzle portion having the nozzle, and
- a mixture portion being a separate component from the nozzle portion, a suction port to draw refrigerant using refrigerant flow injected from the nozzle is disposed in a clearance between the nozzle portion and the mixture portion,
- the mixture portion has an outlet to discharge mixture of refrigerant injected from the nozzle and refrigerant drawn from the suction port,
- each of the nozzle portion and the mixture portion is arranged between the fix portions of the fix plates in the stacked direction, so as to communicate with the header tank through the communication portion,
- each of the nozzle portion and the mixture portion is integrated with the heat exchanger;
- and
- a heat exchange portion is defined between the decompressor and the suction port, heat is exchanged by refrigerant decompressed by the decompressor in the heat exchange portion;
- and
- the suction port is located at an approximate center of the heat exchanger in the stacked direction.
Dependencies are inferred from the claim text.