Ejector

Patent metadata

Field	Value
Publication number	US-10077923-B2
Application number	US-201314651498-A
Country	US
Kind code	B2
Filing date	Nov 28, 2013
Priority date	Dec 13, 2012
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

An ejector includes a body part having a depressurizing space in which a refrigerant flowing out of a swirling space is depressurized, a suction passage that draws a refrigerant from an external, and a pressurizing space in which the refrigerant from the depressurizing space is mixed with the refrigerant from the suction passage, a conical passage formation member that is arranged in the body part, and a driving device that displaces a nozzle body of the body part forming the depressurizing space. A nozzle passage is defined on an outer peripheral side of the passage formation member in the depressurizing space, a diffuser passage is formed on an outer peripheral side of the passage formation member in the pressurizing space, and an actuating bar that couples the driving device with the nozzle body is arranged without crossing the diffuser passage.

First claim

What is claimed is:

1. An ejector for a vapor compression refrigeration cycle device, comprising:
a body part including a swirling space in which a refrigerant flowing from a refrigerant inlet port is swirled, a depressurizing space in which the refrigerant flowing out of the swirling space is depressurized, a suction passage that communicates with a downstream side of the depressurizing space in a refrigerant flow and draws a refrigerant from external to the ejector, and a pressurizing space in which an ejection refrigerant jetted from the depressurizing space is mixed with a suction refrigerant drawn from the suction passage; and
a passage formation member which is at least partially arranged inside the depressurizing space and inside the pressurizing space, and has a conical shape in which a cross-sectional area increases with distance from the depressurizing space, wherein
the body part includes a plurality of members having at least a nozzle body defining the depressurizing space, the nozzle body being located radially outward of the passage formation member,
a refrigerant passage provided between an inner peripheral surface of a portion of the nozzle body, which defines the depressurizing space, and an outer peripheral surface of the passage formation member is a nozzle passage functioning as a nozzle that depressurizes and jets the refrigerant flowing out of the swirling space,
a refrigerant passage provided between an inner peripheral surface of a portion of the body part, which defines the pressurizing space, and an outer peripheral surface of the passage formation member is a diffuser passage functioning as a diffuser that pressurizes a mixture of the ejection refrigerant and the suction refrigerant, and
the diffuser passage has an annular shape in a cross-section surface perpendicular to an axial direction of the passage formation member,
the ejector further comprising a driving device that displaces the nozzle body relative to the passage formation member to change a refrigerant passage area of the nozzle passage.

2. The ejector according to claim 1 , wherein the driving device is arranged outward of the passage formation member in a radial direction of the passage formation member.

3. The ejector according to claim 2 , wherein the driving device transmits a driving force to the nozzle body to move away from an apex part of the passage formation member in an axial direction of the passage formation member.

4. The ejector according to claim 1 , wherein the driving device includes a sealed space in which a temperature sensitive medium that changes in pressure according to a temperature change is sealed, and a pressure responsive member that is displaced according to the pressure of the temperature sensitive medium in the sealed space.

5. The ejector according to claim 1 , further comprising a coupling member that couples the driving device with the nozzle body, wherein the coupling member is arranged without crossing the diffuser passage.

6. The ejector according to claim 1 , further comprising a coupling member that couples the driving device with the nozzle body, wherein the coupling member is arranged outside of the diffuser passage.

7. The ejector according to claim 1 , further comprising a fixed portion that is fixed to the body part, wherein
the fixed portion has a through-hole in a center part thereof,
the nozzle body is arranged in the through-hole of the fixed portion,
the fixed portion houses the driving device around the through-hole, and
the nozzle body has a flange part coupled with the driving device on an opposite side of the fixed portion from the passage formation member.

8. The ejector according to claim 1 , wherein the body part includes a gas-liquid separation space that separates the refrigerant flowing out of the pressurizing space into gas and liquid.

9. The ejector according to claim 1 , wherein the refrigerant flowing in the diffuser passage swirls around an axis of the passage formation member.

10. The ejector according to claim 1 , wherein
the body part further includes a refrigerant inlet passage connecting the refrigerant inlet port and the swirling space, and
the refrigerant inlet passage extends to the swirling space in a tangential direction relative to the swirling space.

Assignees

• Denso Corp

Inventors

• Suzuki Tatsuhiro
• Nishijima Haruyuki
• Yamada Etsuhisa

Classifications

• F25B41/00

  Fluid-circulation arrangements · CPC title

• F04F5/04 Primary

  displacing elastic fluids · CPC title

• F25B9/08

  using ejectors (F25B9/10 takes precedence) · CPC title

• F04F5/461

  Adjustable nozzles · CPC title

• F25B2341/001

  Ejectors not being used as compression device · CPC title