Refrigeration system with a plurality of steam ejectors connected to a plurality of flow traps

Patent metadata

Field	Value
Publication number	US-12013164-B2
Application number	US-202017253169-A
Country	US
Kind code	B2
Filing date	Jul 30, 2020
Priority date	Aug 19, 2019
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

Abstract

Disclosed is a refrigeration system having: a steam ejector with an ejector outlet; and a passive flow trap connected to the ejector outlet.

First claim

What is claimed is:

1. A refrigeration system comprising:
a steam ejector with an ejector outlet; and
a passive flow trap connected to the ejector outlet,
wherein:
the passive flow trap includes an inlet-side drop, a center bend, and an outlet-side rise, thereby defining a U shape, and
the inlet-side drop is larger than the outlet-side rise.

2. The system of claim 1 , comprising a separator connected to an outlet-side of the passive flow trap.

3. The system of claim 2 , wherein the passive flow trap is connected to a lower portion of the separator that is configured to store liquid refrigerant.

4. A refrigeration system, comprising:
a plurality of steam ejectors, each of which including one of a plurality of ejector outlets; and
a plurality of passive flow traps, one of which connected to each of the plurality of ejector outlets,
wherein:
each of the plurality of passive flow traps includes an inlet-side drop, a center bend, and an outlet-side rise, thereby defining a U shape, and
for at least one of the plurality of passive flow traps, the inlet-side drop is larger than the outlet-side rise.

5. The system of claim 4 , wherein for at least two of the plurality of passive flow traps, the outlet-side rise is the same.

6. The system of claim 4 , wherein for each of the plurality of passive flow traps, the outlet-side rise is the same.

7. The system of claim 4 , wherein for each of the plurality of passive flow traps, the outlet-side rise is different.

8. The system of claim 4 , comprising a separator connected to an outlet-side of each of the plurality of passive flow traps.

9. The system of claim 8 , wherein the plurality of passive flow traps are connected to a lower portion of the separator that is configured to store liquid refrigerant.

10. The system of claim 9 , including an evaporator, wherein each of the plurality of steam ejectors includes one of a plurality of ejector first-inlets, each of the plurality of ejector first-inlets is connected to the evaporator.

11. The system of claim 10 , including a plurality of shut-off valves, wherein each of a plurality of shut off valves is connected between the evaporator and one of the plurality of ejector first-inlets.

12. The system of claim 11 , wherein the separator includes a first outlet connected to the evaporator.

13. The system of claim 12 , including a gas cooler, wherein each of the plurality of steam ejectors includes one of a plurality of ejector second-inlets, each of the plurality of ejector second-inlets is connected to the gas cooler.

14. The system of claim 13 , including a compressor, wherein the separator includes a second outlet connected to the compressor.

15. A method of directing flow in the refrigerant system of claim 4 , comprising:
directing a two phase flow from each of the plurality of steam ejectors into one of the plurality of passive flow traps;
directing the two phase flow from each of the plurality of passive flow traps into a separator; and
preventing backflow from the separator from reaching each of the plurality of steam ejectors with one of the plurality of passive flow traps.

Assignees

• Carrier Corp

Inventors

• Zhu Yonghua
• Torchio Marcello

Classifications

• F25B2400/23

  Separators · CPC title

• F25B2341/0015

  using two or more ejectors · CPC title

• F25B2341/0012

  Ejectors with the cooled primary flow at high pressure · CPC title

• F25B41/24

  Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part · CPC title

• F25B2400/22

  Refrigeration systems for supermarkets · CPC title