CN-121990281-A - Automatically performing pressure decay integrity testing of controlled atmosphere of refrigerated container

Abstract

The invention relates to automatically performing a pressure decay integrity test of a controlled atmosphere of a refrigerated container, and in particular provides a method of automatically performing a pressure decay integrity test of a container configured to be refrigerated by a Transport Refrigeration Unit (TRU). The method includes connecting a controller programmed with a pressure decay integrity test of the container to a compressor of the TRU and a pressure transducer mounted in the container, and performing the pressure decay integrity test by the controller. Execution includes activating a compressor to pressurize the container, receiving a reading of the pressure transducer, and determining from the reading whether a pressure decay integrity test passes.

Inventors

• F. Postgate
• D. gloomy in cloth
• R. Weltmann

Assignees

• 开利公司

Dates

Publication Date

20260508

Application Date

20251107

Priority Date

20241107

Claims (20)

1. 1. A method of automatically performing a pressure decay integrity test of a container configured to be refrigerated by a Transport Refrigeration Unit (TRU), the method comprising: Connecting a controller programmed with an automatic pressure decay integrity test of the container to a compressor of the TRU and a pressure transducer mounted in the container, and Performing, by the controller, the automatic pressure decay integrity test, the performing comprising: activating the compressor to pressurize the container; receiving a reading of the pressure transducer, and Determining from the reading whether the automatic pressure decay integrity test passes.
2. 2. The method of claim 1, further comprising recording an indication of whether the automatic pressure decay integrity test passed and the reading.
3. 3. The method of claim 1 or 2, wherein the performing further comprises stopping operation of the TRU.
4. 4. A method according to any one of claims 1 to 3, wherein the performing is done after a pre-trip inspection of the container.
5. 5. A method according to any one of claims 1 to 3, wherein said performing is performed before and after loading said container.
6. 6. The method of any of claims 1-5, wherein the pressure transducer is mounted in a center of the TRU.
7. 7. The method of any of claims 1 to 6, wherein a prerequisite for passing the automatic pressure decay integrity test is that a gas condition inside the container is met.
8. 8. The method of any one of claims 1 to 7, wherein: the pressure transducer comprises a digital hybrid sensor package, The digital hybrid sensor package includes a carbon dioxide sensor, an oxygen sensor, a relative humidity sensor, and a pressure sensor, and Determining from the readings whether the automatic pressure decay integrity test compensates for the effects of relative humidity and pressure on the respective readings of the carbon dioxide sensor and the oxygen sensor by including using the respective readings of the relative humidity sensor and the pressure sensor.
9. 9. A method of automatically performing a pressure decay integrity test of a container configured to be refrigerated by a Transport Refrigeration Unit (TRU), the method comprising: generating an automatic pressure decay integrity test for the container; Placing a controller programmed with the automated pressure decay integrity test in signal communication with a compressor of the TRU and a pressure transducer mounted in the container, and Performing, by the controller, the automatic pressure decay integrity test, the performing comprising: activating the compressor to pressurize the container; receiving a reading of the pressure transducer, and Determining from the reading whether the automatic pressure decay integrity test passes.
10. 10. The method of claim 9, further comprising recording an indication of whether the automatic pressure decay integrity test passed and the reading.
11. 11. The method of claim 9 or 10, wherein the performing further comprises stopping operation of the TRU.
12. 12. A method according to any one of claims 9 to 11, wherein the performing is done after a pre-trip inspection of the container.
13. 13. A method according to any one of claims 9 to 11, wherein the performing is performed before and after loading the container.
14. 14. The method of any of claims 9-13, wherein the pressure transducer is mounted in a center of the TRU.
15. 15. The method of any of claims 9 to 14, wherein a prerequisite for passing the automatic pressure decay integrity test is that a gas condition inside the container is met.
16. 16. The method of any one of claims 9 to 15, wherein: the pressure transducer comprises a digital hybrid sensor package, The digital hybrid sensor package includes a carbon dioxide sensor, an oxygen sensor, a relative humidity sensor, and a pressure sensor, and Determining from the readings whether the automatic pressure decay integrity test compensates for the effects of relative humidity and pressure on the respective readings of the carbon dioxide sensor and the oxygen sensor by including using the respective readings of the relative humidity sensor and the pressure sensor.
17. 17. A container system comprising: A container configured to be refrigerated by a Transport Refrigeration Unit (TRU), the TRU including a compressor; a pressure transducer mounted in the container, and A controller programmed with an automatic pressure decay integrity test of the container and disposed in signal communication with the compressor and the pressure transducer, The controller is configured to perform the automatic pressure decay integrity test by: activating the compressor to pressurize the container; receiving a reading of the pressure transducer, and Determining from the reading whether the automatic pressure decay integrity test passes.
18. 18. The container system of claim 17, wherein the controller is further configured to record an indication of whether the automatic pressure decay integrity test passed and the reading.
19. 19. The container system of claim 17 or 18, wherein the pressure transducer is mounted in the center of the TRU.
20. 20. The container system of any one of claims 17 to 19, wherein: the pressure transducer comprises a digital hybrid sensor package, The digital hybrid sensor package includes a carbon dioxide sensor, an oxygen sensor, a relative humidity sensor, and a pressure sensor, and Determining from the readings whether the automatic pressure decay integrity test compensates for the effects of relative humidity and pressure on the respective readings of the carbon dioxide sensor and the oxygen sensor by including using the respective readings of the relative humidity sensor and the pressure sensor.

Description

Automatically performing pressure decay integrity testing of controlled atmosphere of refrigerated container Technical Field The present disclosure relates to refrigerated containers and, more particularly, to automation of pressure decay integrity testing of controlled atmospheres of refrigerated containers. Background A typical refrigerated cargo container, such as those used for transporting cargo via sea, rail or road, is one that is retrofitted to include a refrigeration unit at one end of the container. The refrigeration unit includes a compressor, a condenser, an expansion valve, and an evaporator. A quantity of refrigerant circulates throughout the refrigeration unit and one or more evaporator fans of the refrigeration unit blow a supply air stream across the evaporator, thereby cooling the supply air and forcing it out into the container. Disclosure of Invention According to one aspect of the present disclosure, a method of automatically performing a pressure decay integrity test of a container configured to be refrigerated by a Transport Refrigeration Unit (TRU) is provided. The method includes connecting a controller programmed with an automatic pressure decay integrity test of the container to a compressor of the TRU and a pressure transducer mounted in the container and performing the automatic pressure decay integrity test by the controller. Execution includes activating a compressor to pressurize the container, receiving a reading from the pressure transducer, and determining from the reading whether an automatic pressure decay integrity test passes. According to one or more additional and/or alternative embodiments, the method further includes recording an indication of whether the automatic pressure decay integrity test passed, and a reading. According to one or more additional and/or alternative embodiments, performing further includes stopping operation of the TRU. According to one or more additional and/or alternative embodiments, the performing is done after a pre-trip inspection of the container. According to one or more additional and/or alternative embodiments, execution may be completed before and after loading the container. According to one or more additional and/or alternative embodiments, the pressure transducer is mounted in the center of the TRU. According to one or more additional and/or alternative embodiments, a prerequisite for an integrity test by automatic pressure decay is that the gas conditions inside the container are met. According to one or more additional and/or alternative embodiments, the pressure transducer includes a digital hybrid sensor package. According to one or more additional and/or alternative embodiments, the digital hybrid sensor package includes a carbon dioxide sensor, an oxygen sensor, a relative humidity sensor, and a pressure sensor, and determining from the readings whether the automatic pressure decay integrity test compensates for the effect of relative humidity and pressure on the respective readings of the carbon dioxide sensor and the oxygen sensor by including using the respective readings of the relative humidity sensor and the pressure sensor. In accordance with one aspect of the present disclosure, a method of automatically performing a pressure decay integrity test of a container configured to be refrigerated by a Transport Refrigeration Unit (TRU) is provided. The method includes generating an automatic pressure decay integrity test for the container, placing a controller programmed with the automatic pressure decay integrity test in signal communication with a compressor of the TRU and a pressure transducer installed in the container, and performing the automatic pressure decay integrity test by the controller. Execution includes activating a compressor to pressurize the container, receiving a reading of the pressure transducer, and determining from the reading whether an automatic pressure decay integrity test passes. According to one or more additional and/or alternative embodiments, the method further includes recording an indication of whether the automatic pressure decay integrity test passed, and a reading. According to one or more additional and/or alternative embodiments, performing further includes stopping operation of the TRU. According to one or more additional and/or alternative embodiments, the performing is done after a pre-trip inspection of the container. According to one or more additional and/or alternative embodiments, execution may be completed before and after loading the container. According to one or more additional and/or alternative embodiments, the pressure transducer is mounted in the center of the TRU. According to one or more additional and/or alternative embodiments, a prerequisite for an integrity test by automatic pressure decay is that the gas conditions in the container are met. According to one or more additional and/or alternative embodiments, the pressure transducer includes a digital hybrid sen