Ac refrigerant circuit

Patent metadata

Field	Value
Publication number	US-2016356535-A1
Application number	US-201514731808-A
Country	US
Kind code	A1
Filing date	Jun 5, 2015
Priority date	Jun 5, 2015
Publication date	Dec 8, 2016
Grant date	—

Abstract

A number of variations may include a refrigeration circuit which may include a compressor operably coupled to an evaporator. Additionally, a compressor may be operably coupled to the evaporator using the suction line. Moreover, the suction line may include a pressure sensor and a temperature sensor.

First claim

What is claimed is:

1 . A refrigeration circuit comprising:
a condenser operably coupled to an evaporator; a compressor operably coupled to the evaporator using a suction line, wherein the suction line includes a pressure sensor and a temperature sensor.

2 . The refrigeration circuit of claim 1 , further comprising a controller constructed and arranged to reduce the compressor capacity or disable a clutch during a low charge condition.

3 . The refrigeration circuit of claim 1 , wherein the controller includes an algorithm to determine whether the circuit is in a low charge condition.

4 . The refrigeration circuit of claim 3 , wherein a temperature sensor is disposed in the discharge line.

5 . The refrigeration circuit of claim 4 , wherein the temperature sensor is the only sensor disposed in the discharge line.

6 . The refrigeration circuit of claim 1 , wherein temperature and pressure are measured directly in the suction line.

7 . The refrigeration circuit of claim 1 , wherein the pressure sensor and the temperature sensor are a single combination sensor constructed and arranged to directly measure both pressure and temperature in the suction line.

8 . A system comprising:
a condenser operably coupled to an evaporator via a liquid line and expansion valve; a compressor operably coupled to the evaporator via a suction line, wherein a pressure sensor and a temperature sensor are disposed in the suction line.

9 . The system of claim 8 , further comprising a controller.

10 . The system of claim 8 , wherein the controller is constructed and arranged to use an algorithm to determine a torque of the compressor.

11 . The system of claim 10 , wherein a temperature sensor is disposed in the discharge line.

12 . The system of claim 8 , wherein a temperature sensor is the only sensor disposed in the discharge line.

13 . The system of claim 8 , wherein temperature and pressure are measured directly in the suction line.

14 . The system of claim 8 , wherein the pressure sensor and the temperature sensor are a single combination sensor constructed and arranged to directly measure both pressure and temperature.

15 . A method comprising:
providing a refrigeration circuit comprising a condenser operably coupled to an evaporator via a liquid line and expansion valve and a compressor operably coupled to the evaporator via a suction line; measuring both a pressure and temperature directly in the suction line.

16 . The method of claim 15 , wherein a controller is constructed and arranged to control flow in the refrigeration circuit.

17 . The method of claim 16 , further comprising determining a torque of the compressor using the pressure and temperature of the suction line.

18 . The method of claim 15 , wherein the pressure sensor and the temperature sensor are a single combination sensor constructed and arranged to directly measure both pressure and temperature in the suction line.

19 . The method of claim 15 , further comprising reducing the capacity or disabling a clutch when it is determined that the circuit is in a low charge mode.

20 . The method of claim 15 , wherein the condenser and the evaporator are operably coupled by the liquid line and the expansion valve.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Garnepudi Gopala K
• Bozeman Jeffrey A

Classifications

• F25B2700/21

  Temperatures · CPC title

• F25B49/022 Primary

  Compressor control arrangements · CPC title

• F25B49/027

  Condenser control arrangements · CPC title

• F25B2700/19

  Pressures · CPC title

• F25B49/02

  for compression type machines, plants or systems · CPC title