System and method for sealing and supporting external pipe connections in fluid lines and directing escaped fluids to a cabinet in an HVAC system

Patent metadata

Field	Value
Publication number	US-11397017-B2
Application number	US-201916580052-A
Country	US
Kind code	B2
Filing date	Sep 24, 2019
Priority date	Sep 24, 2019
Publication date	Jul 26, 2022
Grant date	Jul 26, 2022

Abstract

A stub pipe housing and a method for installing a stub pipe housing in a heating, ventilation, and air conditioning (“HVAC”) system, the stub pipe housing comprising a first end for sealed contact with an external surface of a cabinet in the HVAC system and a non-permeable material extending to a second end for sealed contact with an external pipe. Sealed contact between the first end and the cabinet, sealed contact between the second end and the external surface, and the non-permeable material ensures any fluid escaping the connection between the stub pipe and the external pipe is directed to the cabinet. The stub pipe housing supports the connection using resilient material, rigid material with compliant seals or some combination. Fluids are directed to flow through the stub pipe opening in the cabinet or directed to flow through other openings.

First claim

The invention claimed is:

1. A stub pipe housing for preventing fluid escaping a connection in a fluid line, comprising:
a first end configured for sealed contact with a cabinet, wherein the first end comprises an inner diameter greater than at least an opening for a stub pipe extending from the cabinet, wherein the first end of the stub pipe housing comprises a flange extending radially outward operable to connect the stub pipe housing to the cabinet, the flange comprising an outward protrusion abutting the cabinet;
a second end configured for sealed contact with an external pipe connected to the stub pipe; and
a non-permeable inner surface formed between the first end and the second end;
wherein the external pipe connected to the stub pipe, the non-permeable inner surface, and the sealed contact between the second end and the external pipe define a volume for directing fluid escaping the connection into the opening in the cabinet, wherein at least a portion of the volume is between the external pipe and the stub pipe housing, the opening of the cabinet allowing for fluid communication between the interior of the cabinet and the volume.

2. The stub pipe housing of claim 1 , wherein: the stub pipe extends through a first opening in the cabinet; an external surface of the cabinet comprises a second opening separate from the first opening; the first end of the stub pipe housing comprises an inner diameter adapted for sealed contact with the external surface of the cabinet relative to one or more of the first opening and the second opening; and the first end, the non-permeable inner surface, and the second end are configured to direct fluid escaping the connection to one or more of the first opening and the second opening in the external surface.

3. The stub pipe housing of claim 1 , wherein the non-permeable inner surface comprises an elastomeric material.

4. The stub pipe housing of claim 1 , wherein: the second end comprises a compliant seal; and the sealed contact between the first end and the cabinet, the sealed contact between the compliant seal and the external pipe, and the non-permeable inner surface of the stub pipe housing are configured to direct fluid escaping the connection into an opening in the cabinet.

5. The stub pipe housing of claim 4 , wherein: the stub pipe housing comprises a rigid material; and the stub pipe housing prevents bending at the connection between the stub pipe and the external pipe.

6. The stub pipe housing of claim 1 , wherein: sealed contact between the stub pipe housing and the cabinet comprises contact between the outward protrusion of the flange and an external surface of the cabinet.

7. The stub pipe housing of claim 6 , wherein: the sealed contact between the flange and the cabinet comprises a seal positioned in the stub pipe opening and the edge of the flange seated in the seal, wherein the sealed contact between the flange and the cabinet, the sealed contact between the second end and the external pipe, and the non-permeable inner surface of the stub pipe housing are configured to direct fluid escaping the connection into the opening in the cabinet.

8. A method for directing fluid escaping a connection between an external pipe and a stub pipe to a cabinet in an HVAC system, the method comprising:
positioning a stub pipe housing on the external pipe, wherein the stub pipe housing comprises an inner diameter greater than at least an opening for a stub pipe extending from the cabinet and a second end adapted for contact with the external pipe;
forming a connection between the external pipe and the stub pipe;
forming a sealed contact between the first end of the stub pipe housing and the cabinet, wherein the first end of the stub pipe housing comprises a flange extending radially outward operable to connect the stub pipe housing to the cabinet, the flange comprising an outward protrusion abutting the cabinet; and
directing fluid escaping the connection into the opening in the cabinet, wherein the fluid is directed into the opening through a volume defined by the external pipe connected to the stub pipe, the non-permeable inner surface, and the sealed contact between the second end and the external pipe, the opening of the cabinet allowing for fluid communication between the interior of the cabinet and the volume, wherein at least a portion of the volume is between the external pipe and the stub pipe housing.

9. The method of claim 8 , wherein the non-permeable material comprises an elastomeric material.

10. The method of claim 8 , wherein: configuring the stub pipe housing for sealed contact with the external pipe comprises one of positioning the second end on the external pipe, wherein the second end of the stub pipe housing comprises a compliant seal; and the sealed contact between the first end and the cabinet, the sealed contact between the compliant seal and the external pipe, and the non-permeable inner surface of the stub pipe housing are configured to direct fluid escaping the connection into an opening in the cabinet.

11. The method of claim 10 , wherein: the stub pipe housing comprises a rigid material; and the stub pipe housing prevents bending at the connection between the stub pipe and the external pipe.

12. The method of claim 8 , further comprising: positioning a seal on an external surface of the cabinet; and seating the outward protrusion of the flange in the seal.

13. The method of claim 12 , further comprising: wherein the sealed contact between the flange and the cabinet, the sealed contact between the second end and the external pipe, and the non-permeable inner surface of the stub pipe housing are configured to direct fluid escaping the connection into the opening in the cabinet.

14. An HVAC system, comprising:
a compressor, an evaporator, and a condenser forming a refrigeration cycle;
a plurality of fluid lines coupled to the compressor, the evaporator, and the condenser, wherein each connection between a fluid line and one of the compressor, the evaporator, and the condenser represents a point at which fluid can escape the HVAC system; and
a stub pipe housing for directing fluid escaping each connection to a cabinet having a fluid detection sensor, wherein the stub pipe housing comprises:
a first end for sealed contact with the cabinet, wherein the first end comprises an inner diameter greater than at least an opening for a stub pipe extending from the cabinet, wherein the first end of the stub pipe housing comprises a flange extending radially outward operable to connect the stub pipe housing to the cabinet, the flange comprising an outward protrusion abutting the cabinet;
a second end configured for sealed contact with an external pipe connected to the stub pipe; and
a non-permeable inner surface formed between the first end and the second end; and

wherein the external pipe connected to the stub pipe, the non-permeable inner surface, and the sealed contact between the second end and the external pipe define a volume for directing fluid escaping the connection into the opening in the cabinet, the opening of the cabinet allowing for fluid communication between the interior of the cabinet and the volume, wherein at least a portion of the volume is between the external pipe and the stub pipe housing.

15. The HVAC system of claim 14 , wherein the non-permeable inner surface comprises an elastomeric material.

16. The HVAC system of claim 14 , wherein: the second end comprises a compliant seal; and the sealed contact between the first end and the cabinet, the sealed contact between the compliant seal and the external pipe, and the non-per

Assignees

• Lennox Ind Inc

Inventors

• Uselton Robert B

Classifications

• F24F1/32

  for connecting the separate outdoor units to indoor units · CPC title

• F24F1/0326

  characterised by the arrangement of refrigerant piping outside the heat exchanger within the unit casing · CPC title

• F24F1/0068 Primary

  characterised by the arrangement of refrigerant piping outside the heat exchanger within the unit casing · CPC title

• F25B41/40

  Fluid line arrangements · CPC title

• F25B2500/22

  Preventing, detecting or repairing leaks of refrigeration fluids · CPC title