Ejector module

Patent metadata

Field	Value
Publication number	US-11480197-B2
Application number	US-201916557685-A
Country	US
Kind code	B2
Filing date	Aug 30, 2019
Priority date	Mar 2, 2017
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

When an ejector having a variable nozzle and a variable throttle mechanism are integrated together as an ejector module, a nozzle-side central axis CL1 and a decompression-side driving mechanism have a twisted positional relationship, if the nozzle-side central axis CL1 is defined as a central axis of a nozzle-side driving mechanism in a displacement direction in which the nozzle-side driving mechanism of the ejector having the variable nozzle displaces a needle valve, and the decompression-side central axis CL2 is defined as a central axis of a decompression-side driving mechanism in a displacement direction in which the decompression-side driving mechanism of the variable throttle mechanism displaces a throttle valve. When viewed from the central axis direction of one of the nozzle-side central axis CL1 and the decompression-side central axis CL2, a driving portion corresponding to the one central axis is disposed to overlap with the other central axis.

First claim

What is claimed is:

1. An ejector module for use in an ejector refrigeration cycle, the ejector refrigeration cycle including: a compressor configured to compress and discharge a refrigerant; a radiator configured to dissipate heat from the refrigerant discharged from the compressor; a first evaporator configured to evaporate the refrigerant; and a second evaporator configured to evaporate the refrigerant and to cause the refrigerant to flow out to a suction side of the compressor, the ejector module comprising:
a nozzle configured to decompress a part of the refrigerant flowing out of the radiator and to inject the decompressed refrigerant;
a decompression portion configured to decompress another part of the refrigerant flowing out of the radiator;
a body portion having a refrigerant suction port, through which the refrigerant is drawn from an outside by a suction effect of an injection refrigerant injected from the nozzle;
a pressurizing portion configured to pressurize a mixed refrigerant of the injection refrigerant and a suction refrigerant drawn from the refrigerant suction port;
a decompression-side valve body configured to change a passage cross-sectional area of the decompression portion; and
a decompression-side driving mechanism configured to displace the decompression-side valve body, wherein
a throttle-side outlet through which the refrigerant flows out of the decompression portion is connected to a refrigerant inlet side of the first evaporator,
the refrigerant suction port is connected to a refrigerant outlet side of the first evaporator,
an ejector-side outlet through which the refrigerant flows out of the pressurizing portion is connected to a refrigerant inlet side of the second evaporator, and
the decompression-side driving mechanism and a central axis of the nozzle are disposed to overlap each other when viewed from a direction of a decompression-side central axis, in a case where the decompression-side central axis is defined as a central axis of the decompression-side driving mechanism in a displacement direction in which the decompression-side driving mechanism displaces the decompression-side valve body.

2. The ejector module according to claim 1 , wherein
the decompression-side central axis and the central axis of the nozzle have a twisted positional relationship.

3. The ejector module according to claim 1 , wherein
the decompression-side driving mechanism displaces the decompression-side valve body such that a superheat degree of the refrigerant on an outlet side of the first evaporator approaches 0° C.

4. The ejector module according to claim 1 , wherein
at least a part of the pressurizing portion is provided to be accommodated in the second evaporator or in a pipe connected to the second evaporator by protruding from the body portion.

5. The ejector module according to claim 1 , wherein
the body portion is provided with a high-pressure inlet into which the refrigerant flowing out of the radiator flows, an outflow side passage through which the refrigerant flowing out of the second evaporator is guided to a suction port side of the compressor, a low-pressure inlet through which the refrigerant flows into the outflow side passage, and a low-pressure outlet through which the refrigerant flows out of the outflow side passage,
the high-pressure inlet and the low-pressure outlet are opened in the same direction, and
the ejector-side outlet, the low-pressure inlet, the refrigerant suction port, and the throttle-side outlet are opened in the same direction.

6. The ejector module according to claim 1 , wherein
the body portion has a high-pressure inlet into which the refrigerant flowing out of the radiator flows, and
a maximum passage cross-sectional area of the decompression portion, obtained when the decompression-side driving mechanism displaces the decompression-side valve body, is equal to or more than a minimum passage cross-sectional area of a refrigerant passage that leads from the high-pressure inlet to the decompression portion.

7. The ejector module according to claim 1 , wherein
the decompression portion configured to decompress is a throttle passage formed in a rotary body shape and the pressurizing portion configured to pressurize is a diffuser.

8. The ejector module according to claim 1 , wherein
the body portion is provided with a suction side passage in which the refrigerant flowing out of the first evaporator flows,
the decompression-side driving mechanism includes a decompression-side thermo-sensitive portion having a decompression-side deformation member that is deformable in accordance with a temperature and a pressure of the refrigerant flowing out of the first evaporator, and
at least a part of the decompression-side thermo-sensitive portion is disposed in the suction-side passage or in a space communicating with the suction-side passage.

9. The ejector module according to claim 8 , wherein
the decompression-side deformation member is a decompression-side diaphragm.

10. An ejector module for use in an ejector refrigeration cycle, the ejector refrigeration cycle including: a compressor configured to compress and discharge a refrigerant; a radiator configured to dissipate heat from the refrigerant discharged from the compressor; a first evaporator configured to evaporate the refrigerant; and a second evaporator configured to evaporate the refrigerant and to cause the refrigerant to flow out to a suction side of the compressor, the ejector module comprising:
a nozzle configured to decompress a part of the refrigerant flowing out of the radiator and to inject the decompressed refrigerant;
a decompression portion configured to decompress another part of the refrigerant flowing out of the radiator;
a body portion that has a refrigerant suction port through which the refrigerant is drawn from an outside by a suction effect of an injection refrigerant injected from the nozzle;
a pressurizing portion configured to pressurize a mixed refrigerant of the injection refrigerant and a suction refrigerant drawn from the refrigerant suction port;
a nozzle-side valve body configured to change a passage cross-sectional area of the nozzle;
a nozzle-side driving mechanism configured to displace the nozzle-side valve body;
a decompression-side valve body configured to change a passage cross-sectional area of the decompression portion; and
a decompression-side driving mechanism configured to displace the decompression-side valve body, wherein
a throttle-side outlet through which the refrigerant flows out of the decompression portion is connected to a refrigerant inlet side of the first evaporator,
the refrigerant suction port is connected to a refrigerant outlet side of the first evaporator,
an ejector-side outlet through which the refrigerant flows out of the pressurizing portion is connected to a refrigerant inlet side of the second evaporator,
a nozzle-side central axis is defined as a central axis of the nozzle-side driving mechanism in a displacement direction in which the nozzle-side driving mechanism displaces the nozzle-side valve body, and a decompression-side central axis is defined as a central axis of the decompression-side driving mechanism in a displacement direction in which the decompression-side driving mechanism displaces the decompression-side valve body, and
when viewed from a central axis direction of each of the nozzle-side central axis and the decompression-side central axis, the driving mechanism corresponding to the nozzle-side central axis and the driving mechanism corresponding to the decompression-side central axis are respectively disposed to overlap with each other.

11. The ejector module according to

Assignees

• Denso Corp

Inventors

• Kawamoto Yoichiro
• Ogata Gota
• Oshitani Hiroshi
• Fukushima Ryu
• Hotta Teruyuki
• Suzuki Tatsuhiro
• Yuan Hang
• Sakurai Daisuke
• Ito Masahiro
• Maeda Hiroshi

Classifications

• F04F5/461

  Adjustable nozzles · CPC title

• F25B5/04

  arranged in series · CPC title

• F04F5/52

  of evacuating pumps · CPC title

• F04F5/20

  for evacuating · CPC title

• F25B41/00

  Fluid-circulation arrangements · CPC title