# US 2018/0320932 A1 · Refrigeration warming system for refrigeration systems

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- Number: US 2018/0320932 A1
- Document ID: US20180320932A1
- Status: Published application
- Kind: A1
- Application number: 15/587,750
- Filed: 2017-05-05
- Published: 2018-11-08
- Earliest claimed: 2017-05-05
- Assignees: Cooper Research, LLC
- Inventors: Thomas COOPER
- Web page: https://patentgrep.com/patent/US20180320932A1

## CPC

- F25B 5/02: arranged in parallel
- F25B 5/04: arranged in series
- F25B 39/00: Evaporators; Condensers
- F25B 43/006: {Accumulators}
- F25B 39/028: {having distributing means}
- F25B 2400/04: Refrigeration circuit bypassing means
- F25B 2400/05: Compression system with heat exchange between particular parts of the system
- F25B 2400/23: Separators
- F25B 2400/25: Liquid pumps
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS

## Abstract

A refrigeration system including a condenser, a compressor, a first transportation system passing refrigerant between the compressor and the condenser, a first evaporator, a second evaporator, a second transportation system passing the refrigerant between the condenser and a holding vessel, with the holding vessel including refrigerant in gas and liquid form, a third transportation system passing the refrigerant between the holding vessel and a pump, a fourth transportation system passing the refrigerant between the pump and the first evaporator, a fifth transportation system passing the refrigerant between the pump and the second evaporator, and a heat exchanger wherein the refrigerant in the second transportation system exchanges heat with the refrigerant in the fifth transportation system to heat the refrigerant in the fifth transportation system before the refrigerant passes to the second evaporator. The refrigerant is expanded between the condenser and the first and second evaporators to lower the pressure thereof.

## Claims

### Claim 1

A refrigeration system comprising:
a condenser;
a compressor;
a first transportation system passing refrigerant between the compressor and the condenser;
a first evaporator;
a second evaporator;
a second transportation system passing the refrigerant between the condenser and a holding vessel, the holding vessel including refrigerant in gas and liquid form;
a third transportation system passing the refrigerant between the holding vessel and a pump;
a fourth transportation system passing the refrigerant between the pump and the first evaporator;
a fifth transportation system passing the refrigerant between the pump and the second evaporator; and
a heat exchanger wherein the refrigerant in the second transportation system exchanges heat with the refrigerant in the fifth transportation system to heat the refrigerant in the fifth transportation system before the refrigerant passes to the second evaporator;
wherein the refrigerant is expanded between the condenser and the first and second evaporators to lower the pressure of the refrigerant.

### Claim 2 (depends on 1)

The refrigeration system of claim 1, wherein:
the refrigerant is ammonia.

### Claim 3 (depends on 1)

The refrigeration system of claim 1, wherein:
the heat exchanger is a counter flow heat exchanger.

### Claim 4 (depends on 1)

The refrigeration system of claim 1, wherein:
a sixth transportation system is located between the first and second evaporators and the vessel for transporting the refrigerant from the first and second evaporators to the vessel.

### Claim 5 (depends on 1)

The refrigeration system of claim 1, wherein:
the refrigerant in gas form passes from the vessel to the compressor; and
the refrigerant in liquid form passes from the vessel to the pump.

### Claim 6 (depends on 1)

The refrigeration system of claim 1, wherein:
the second evaporator is an air handler for cooling air in the air handler.

### Claim 7

A method of refrigeration comprising:
providing a condenser, a compressor, a first evaporator, and a second evaporator;
transporting a refrigerant between the compressor and the condenser;
transporting the refrigerant between the condenser and a holding vessel, the holding vessel including refrigerant in gas and liquid form;
transporting the refrigerant between the holding vessel and a pump;
transporting the refrigerant between the pump and the first evaporator;
transporting the refrigerant between the pump and the second evaporator;
transporting the refrigerant between the pump and the first evaporator and between the pump and the second evaporator through a heat exchanger;
heating the refrigerant passing between the pump and the second evaporator with the refrigerant passing between the pump and the first evaporator in the heat exchanger; and
expanding the refrigerant between the condenser and the first and second evaporators to lower the pressure of the refrigerant.

### Claim 8 (depends on 7)

The method of refrigeration of claim 7, wherein:
the refrigerant is ammonia.

### Claim 9 (depends on 7)

The method of refrigeration of claim 7, wherein:
the heat exchanger is a counter flow heat exchanger.

### Claim 10 (depends on 7)

The method of refrigeration of claim 7, further including:
transporting the refrigerant from the first and second evaporators to the vessel.

### Claim 11 (depends on 7)

The method of refrigeration of claim 7, further including:
transporting the refrigerant in gas form from the vessel to the compressor; and
transporting the refrigerant in liquid form from the vessel to the pump.

### Claim 12 (depends on 7)

The method of refrigeration of claim 7, wherein:
the first evaporator is an air handler for cooling air in the air handler.