Low charge packaged refrigeration systems

Patent metadata

Field	Value
Publication number	US-11359844-B2
Application number	US-201916731460-A
Country	US
Kind code	B2
Filing date	Dec 31, 2019
Priority date	Jul 2, 2014
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

A packaged, pumped liquid, recirculating refrigeration system with charges of 10 lbs or less of refrigerant per ton of refrigeration capacity. The compressor and related components are situated in a pre-packaged modular machine room, and in which the condenser is mounted on the machine room and the evaporator is close coupled to the pre-packaged modular machine room. Prior art large receiver vessels may be replaced with a single or dual phase cyclonic separator also housed in the pre-packaged modular machine room.

First claim

The invention claimed is:

1. A refrigeration system comprising:
a refrigerant condenser; and
a transportable pre-fabricated modular machine room containing:
a vapor/liquid separation structure configured to be connected to an outlet of an evaporator via refrigerant line;
a refrigerant compressor connected to an outlet of said vapor/liquid separation structure via refrigerant line and connected to an inlet of said condenser via refrigerant line;
a collection vessel connected to an outlet of said refrigerant condenser via refrigerant line;
refrigerant line connecting an outlet of said collection vessel to an inlet of said vapor/liquid separation structure;

wherein said vapor/liquid separation structure has an outlet that is configured to be connected via refrigerant line to an inlet of an evaporator;
said refrigeration system further comprising refrigerant in an amount of less than six pounds of refrigerant per ton of refrigeration capacity.

2. The refrigeration system according to claim 1 , further comprising an evaporator connected to an inlet of said vapor/liquid separation structure and connected to an outlet of said vapor/liquid separation structure.

3. The refrigeration system according to claim 2 , wherein said evaporator is mounted in a pre-fabricated modular evaporator room.

4. The refrigeration system according to claim 2 , wherein said evaporator is mounted in a refrigerated space adjacent to or below said transportable pre-fabricated modular machine room.

5. The refrigeration system according to claim 1 , further comprising a recirculator pump situated in a refrigerant flow path between a fluid outlet of said vapor/liquid separation structure, and an inlet of an evaporator.

6. The refrigeration system according to claim 1 , wherein said condenser is an air-cooled condenser comprising coils and a fan that are configured to be mounted on top of said transportable pre-fabricated modular machine room.

Assignees

• Evapco Inc

Inventors

• Liebendorfer Kurt
• Derosier Gregory S
• Hegg Trevor

Classifications

• F25D11/00 Primary

  Self-contained movable devices, e.g. domestic refrigerators · CPC title

• F25B1/005 Primary

  of the single unit type (F25B1/10 takes precedence) · CPC title

• F25B2400/23

  Separators · CPC title

• F25B2700/197

  of the evaporator · CPC title

• F25B2400/13

  Economisers · CPC title