Condensate management system and methods

• US 8,961,708 B2
• Filed: 11/13/2013
• Issued: 02/24/2015
• Est. Priority Date: 11/13/2012
• Status: Active Grant

• Current Assignee: Plexaire, LLC
• Original Assignee: Plexaire, LLC
• Inventors: Kaiser, Stewart, Williams, William G.
• Primary Examiner(s): Jules, Frantz
• Assistant Examiner(s): Shaikh, Meraj A
• Application Number:
  US14/079,438
• Publication Number:
  US 20140130529A1
• Time in Patent Office: 468 Days
• Field of Search: 622/85, 622/91, 621/50, 622/72, 432/8, 433/2, 466/8, 468/2, 468/3, 4426-435, 438/6
• US Class Current: 134/166.C
• CPC Class Codes: B08B 3/04 Cleaning involving contact with liquid
• CPC Class Codes: B08B 9/032 by the mechanical action of a moving fluid, e.g. by flushing B08B9/04 takes precedence ; by fluid jets mounted on cleaning devices B08B9/0433
• CPC Class Codes: B08B 9/0325 Control mechanisms therefor
• CPC Class Codes: F24F 13/222 for evacuating condensate
• CPC Class Codes: F24F 2013/227 Condensate pipe for drainage of condensate from the evaporator
• CPC Class Codes: F25B 47/00 Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
• CPC Class Codes: F25D 21/14 Collecting or removing condensed and defrost water; Drip trays
• CPC Class Codes: Y10T 137/0402 Cleaning, repairing, or assembling
• CPC Class Codes: Y10T 137/4245 Cleaning or steam sterilizing
• CPC Class Codes: Y10T 137/4259 With separate material addition
• CPC Class Codes: Y10T 137/4442 External pressure
• CPC Class Codes: Y10T 137/85994 Manual
• CPC Class Codes: Y10T 137/86083 Vacuum pump
• CPC Class Codes: Y10T 137/86099 Hand pump

Abstract

A condensate management system for an air conditioning condensate drainage system is provided. The condensate management system may comprise an inlet and an outlet; a primary condensate flow path from the inlet to the outlet; a check valve disposed along the primary condensate flow path; a flush path from the inlet to the outlet; a pump coupled to the flush path; and a logic panel configured to actuate the pump to a flushing mode. The check valve may be configured to allow fluid flow from the inlet to the outlet. When the logic panel is configured to actuate the pump to the flushing mode, the pump is configured to exert a negative pressure at the inlet and a positive pressure at the outlet. Other system and methods to flush a condensate drain system are also described.

Claims

1. A condensate management system for a condensate drain, the condensate management system comprising:

an inlet and an outlet;

a primary condensate flow path from the inlet to the outlet

a check valve disposed along the primary condensate flow path;

a flush path from the inlet to the outlet that is different than the primary condensate flow path;

a pump coupled in or on the flush path; and

a logic panel configured to detect a condition for flushing and to actuate the pump between a flushing mode and a standby mode based on the condition for flushing;

wherein the check valve is configured to allow fluid flow from the inlet to the outlet;

wherein when the pump is actuated to the flushing mode, the pump is configured to exert a negative pressure at the inlet and a positive pressure at the outlet,

wherein the negative pressure at the inlet and the positive pressure at the outlet closes the check valve.

2. The condensate management system of claim 1, wherein the flush path is substantially in parallel with the primary condensate flow path.

3. The condensate management system of claim 1, wherein the flush path further comprises a flush line check valve.

4. The condensate management system of claim 1, wherein the flush path further comprises a flush path inlet fluidly connected to the inlet and a flush path outlet fluidly connected to the outlet, wherein the flush path inlet fluidly connects to a lower portion of the inlet.

5. The condensate management system of claim 1, wherein the logic panel is configured to detect a predetermined condensate level in a drain pan of an air conditioner.

6. The condensate management system of claim 5, wherein the logic panel is further configured to de-energize a compressor of the air conditioner in order to prevent condensate overflow of the drain pan.

7. The condensate management system of claim 5, wherein the logic panel is further configured to actuate the pump to the flushing mode after the predetermined condensate level in the drain pan is detected.

8. The condensate management system of claim 5, wherein the logic panel is further configured to actuate the pump to the standby mode and determine a condensate level in the drain pan after the pump is actuated to the standby mode.

9. The condensate management system of claim 1, wherein the logic panel is configured to actuate the pump at predetermined time intervals for a predetermined time period.

20. The condensate management system of claim 1, the flush path comprising a flush path inlet and a flush path outlet, wherein the flush path inlet is connected to the inlet and the flush path outlet is connected to the outlet.

21. The condensate management system of claim 1, wherein the pump is coupled in or on the flush path and is configured to pump from the inlet to the outlet.

10. A condensate management system for purging and cleaning an air conditioning condensate drainage system, the condensate management system comprising:

a housing having a housing inlet and a housing outlet;

a primary condensate flow line from the housing inlet to the housing outlet;

a flush line having a pump, a flush line inlet, and a flush line outlet, wherein the flush line inlet is connected to the housing inlet, and the flush line outlet is connected to the housing outlet, wherein the pump is provided in or on the flush line and is configured to pump from the flush line inlet to the flush line outlet;

wherein the pump is configured to be actuated between a standby mode and a flushing mode by a controller in order to create a negative pressure at the housing inlet and a positive pressure at the housing outlet during the flushing mode.

11. The condensate management system of claim 10, wherein the controller is configured to sense a condition to actuate the pump from the standby mode to the flushing mode.

12. The condensate management system of claim 11, wherein the condition to actuate the pump from the standby mode to the flushing mode is one of a flooding condition, a clog in the condensate drainage system, a scheduled flush, or a user-actuated flush.

13. The condensate management system of claim 11, wherein the condition for flushing comprises at least one or both of detecting an elevated condensate level in a drain pan and a predetermined time interval between flushings.

14. The condensate management system of claim 11, further comprising a check valve disposed with the primary condensate flow line, the check valve having an open position and a closed position, wherein the check valve is in the closed position during the flushing mode.

15. The condensate management system of claim 14, wherein energizing the pump further comprises energizing the pump for a predetermined time period.

16. The condensate management system of claim 15, wherein energizing the pump for the predetermined time period further comprises de-energizing and energizing the pump a predetermined number of times.

17. The condensate management system of claim 11, wherein the controller is configured to determine whether the condition for flushing the condensate drainage system is resolved.

18. The condensate management system of claim 17, wherein if the controller determines the condition for flushing is not resolved, the controller is configured to de-energize a compressor of an air conditioning system.

19. The condensate management system of claim 17, wherein if the controller determines the condition for flushing is not resolved, the controller is configured to transmit an alert.

22. The condensate management system of claim 10, wherein the negative pressure at the housing inlet and the positive pressure at the housing outlet is adapted to close the check valve.