Methods and systems for preventing premature compressor failure from improper operation

Patent metadata

Field	Value
Publication number	US-11085686-B2
Application number	US-201916716048-A
Country	US
Kind code	B2
Filing date	Dec 16, 2019
Priority date	May 8, 2017
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

Methods and systems for detecting and correcting improper operation of a compressor in a refrigeration system and/or an HVAC system include a component level detection and prevention and a system level detection and prevention. The system level detection and prevention can be a backup or a confirmation of the component level detection and prevention. The component level detection and prevention can detect and prevent improper compressor operation within a predetermined time so that the compressor's operation period in an improper direction can be minimized, thereby minimizing wear and damage to the compressor.

First claim

What is claimed is:

1. A method for detecting and correcting an improper operation of a compressor of a refrigerant circuit, the method comprising:
operating the compressor by a compressor drive module;
upon operating the compressor, detecting whether the compressor is operating in an improper direction by comparing a measured sensor profile of a refrigerant circuit parameter and a previously stored start-up sensor profile, the measured sensor profile tracking sensed values of the parameter over a predetermined period of time;
stabilizing the compressor after comparing the measured sensor profile and the previously stored start-up sensor profile;
during the stabilizing step, measuring a stabilization sensor profile;
confirming whether the compressor is operating in the improper direction by comparing the measured stabilization sensor profile and a predetermined stabilization sensor profile;
correcting operation of the compressor when it is detected that the compressor is operating in the improper direction, wherein correcting operation of the compressor includes adjusting an operation direction of the compressor by the compressor drive module; and
operating the compressor when it is detected that the compressor is operating properly.

2. The method according to claim 1 , wherein operating the compressor includes:
storing an operational information of the compressor in a memory of the compressor drive module; and
operating the compressor to compress refrigerant directed through the refrigerant circuit.

3. The method according to claim 1 , further comprising:
detecting a failure condition of the compressor; and
generating an alarm when the failure condition is detected.

4. The method according to claim 3 , wherein generating the alarm includes:
recording an operational condition of the compressor;
stopping the compressor by the compressor drive module; and
generating the alarm to notify a user.

5. A system for detecting and correcting an improper operation of a compressor, the system comprising:
the compressor that compresses refrigerant directed through a refrigerant circuit;
a compressor drive module that drives the compressor; and
a controller that controls operation of the compressor drive module,
wherein the compressor includes a mechanical component,
the compressor drive module is configured to operate the compressor;
upon operating the compressor, the controller is configured to detect whether the compressor is operating in an improper direction by monitoring the mechanical component;
the controller is configured to correct operation of the compressor, via the compressor drive module, when it is detected that the compressor is operating in the improper direction; and
the controller is configured to operate the compressor, via the compressor drive module, when it is detected that the compressor is operating properly,

wherein the mechanical component is a mechanical tracer, when the compressor is operating in the improper direction, the mechanical tracer of compressor is configured to add a signature in a torque, and the controller is configured to monitor the signature of the torque.

6. The system according to claim 5 , wherein when the controller is configured to correct operation of the compressor via the compressor drive module, the controller is configured to adjust an operational direction of the compressor.

7. The system according to claim 5 , wherein when the controller is configured to operate the compressor via the compressor drive module:
the controller is configured to store an operational information of the compressor in a memory of the compressor drive module; and
the compressor is configured to compress refrigerant directed through the refrigerant circuit.

8. The system according to claim 5 , wherein the controller is further configured to detect a failure condition of the compressor, and the controller is configured to generate an alarm when the failure condition is detected.

9. The system according to claim 8 , wherein when the controller is configured to generate the alarm:
the controller is configured to record an operational condition of the compressor;
the compressor drive module is configured to stop the compressor; and
the controller is configured to generate the alarm to notify a user.

10. The system according to claim 5 , wherein the mechanical tracer is a cog wheel, when the compressor is operating in the improper direction, the cog wheel is configured to tug on the compressor, and the controller is configured to monitor tugs of the cog wheel.

11. The method according to claim 1 , wherein correcting operation of the compressor is conducted via a control software.

Assignees

• Thermo King Corp

Inventors

• Schumacher Ryan Wayne
• Sanders Russell L
• Vanous Michael James
• Andrade Dias Marcelo

Classifications

• F04C18/356

  with vanes reciprocating with respect to the outer member · CPC title

• F04C2240/81

  Sensor, e.g. electronic sensor for control or monitoring · CPC title

• F04C28/28

  Safety arrangements; Monitoring · CPC title

• F04C2270/78

  Warnings · CPC title

• F25B49/005

  of safety devices (F25B49/02 and F25B49/04 take precedence) · CPC title