An ejector including a nozzle 17 having a high pressure space 18 into which a high pressure coolant flows from an inlet 17a and a throttle portion 17c for reducing a passage area of the high pressure coolant from the high pressure space 18 to jet port 17b, a needle valve 19 for changing opening of the throttle portion 17c by undergoing displacement in an axial direction R of the throttle portion 17c, and a suction space 22 in which a jet port 17b and a gaseous phase coolant inlet 22a are arrange...

An ejector is provided with an interior surface wetting device for introducing a cleaning liquid into a suction chamber of the ejector to form a thin wall of the cleaning liquid covering an interior surface of the ejector. The interior surface wetting device includes a cleaning liquid inlet opening to be fluidly connected to a source of cleaning liquid and a cleaning liquid outlet opening for introducing the cleaning liquid into a suction chamber. The wetting device may be in the form of a pipe ...

An ejector 110 having an additional nozzle 173 for issuing a fluid at a relatively high pressure through a throat 113 of the ejector 110 into an outlet 114 from the throat 113, so as to clear any material lodging in the outlet 114 and/or the throat 113. The additional nozzle 113 may be co-axial with the main nozzle 140 of the ejector 110, or angularly disposed from it.

An ejector for generating a vacuum, with a housing, a propellant nozzle having a narrowed part, a diffuser section, a suction connector terminating in the narrowed part, as well as an exhaust air conduit for the pressure gas and the exhausted air, a simple construction is achieved in that the housing of the ejector is designed as a sectional support for at least two propellant nozzles.

The invention relates to a variable capacity type ejector capable of more precisely adjusting a flow rate of refrigerant in a range in which a displacement means can displace a needle and also capable of increasing a flow rate of refrigerant when the needle valve is fully opened. In the needle valve 24 which changes the degree of opening (throat portion area) of the nozzle 18 when the needle is displaced in the axial direction R of the throttle portion 18b, the second tapered portion 24b is form...

A nozzle (41) is made of a sintered metal, and a pressure increasing portion (a mixing portion (42) and a diffuser (43)) is manufactured by plastic-forming a metal pipe. Accordingly, the nozzle (41) can be manufactured in a short time while high accuracy in machining is maintained. Thus, the cost of manufacturing an ejector (40) can be reduced.

An ejector device having large evacuation capacity comprises a cylindrical body the cylinder face of which is subdivided into ring shaped chambers which extend around and are partitioned off from an empty space at the center of the cylinder. The said chambers are interconnected in succession to one another by ejector nozzles seated co-axially to one another in the partitions between the chambers. There is also provided an inlet into the device for a pressure medium and an outlet from one of the ...

An ejector comprises a nozzle for a motive fluid opening into a mixing zone, and a diffusor downstream of the mixing zone for the motive and entrained fluids. The motive jet nozzle is annular and has its mouth substantially radially outwardly directed. The diffusor consists of two spaced plates, discs or the like, and the nozzle is directed between the plates which are so arranged relative to one another that the cross sectional area between them increases in a radial sense, as viewed from the n...

The present invention has an object to provide an ejector cycle and an ejector, according to which a sufficient cooling performance can be obtained even when the input amount of the refrigerant to the ejector is decreased. A passage changeover means having a bypass channel is formed in an ejector. The passage changeover means opens the bypass channel in a bypass cooling operation, in which an input amount of the refrigerant to the ejector is decreased due to a low ambient temperature, and so on....

In an ejector cycle with an ejector including a nozzle for decompressing refrigerant, an insulation member is provided on an outer surface of the ejector to suppress a heat exchange with an external side. When a suction portion of the ejector is insulated by the insulation member, pressure loss in the suction portion can be reduced, a gas refrigerant ratio at an inlet port of the mixing portion can be reduced, and a liquid refrigerant amount to be supplied to the evaporator can be increased. In ...