Condensate bypass apparatus

• US 6,527,005 B2
• Filed: 05/14/2001
• Issued: 03/04/2003
• Est. Priority Date: 05/14/2001
• Status: Active Grant

• Current Assignee: Radon Central, Inc.
• Original Assignee: Radon Control, Inc.
• Inventors: Weaver, Steven K.
• Primary Examiner(s): Walton, George L.
• Application Number:
  US09/854,972
• Publication Number:
  US 20020166587A1
• Time in Patent Office: 659 Days
• Field of Search: 521/695, 137/312, 137/343, 137/357, 405/129.7, 405/129.85, 405/229, 405/303, 454/341, 454/345, 454/909
• US Class Current: 137/312
• CPC Class Codes: E02D 31/008 against entry of noxious gases, e.g. Radon
• CPC Class Codes: F23J 2900/13004 Water draining devices associated with flues
• CPC Class Codes: F24F 2110/68 Radon
• CPC Class Codes: F24H 8/006 Means for removing condensate from the heater
• CPC Class Codes: Y02B 30/00 Energy efficient heating, ventilation or air conditioning [HVAC]
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
• CPC Class Codes: Y10S 454/909 Radon prevention
• CPC Class Codes: Y10T 137/5762 With leakage or drip collecting
• CPC Class Codes: Y10T 137/6851 With casing, support, protector or static constructional installations
• CPC Class Codes: Y10T 137/6969 Buildings

Abstract

An apparatus for diverting condensate which forms inside an exhaust system. The exhaust system comprises an exhaust side in which condensate may be formed, a suction side, and an exhaust fan between the exhaust side and the suction side and coupled to each of the exhaust side and the suction side to form a conduit through which gaseous fluid may be conveyed. A hollow tube having a first open end and a second open end is provided. The first end is coupled to the exhaust side and the second end is coupled to the suction side so that the hollow tube communicates between the exhaust side and the suction side in a manner bypassing the exhaust fan. A means exists inside the exhaust side for diverting condensate away from the exhaust fan apparatus. The means is positioned to channel condensate into the first open end of the hollow tube.

Claims

1. A condensate bypass apparatus for diverting condensate which forms inside an exhaust system, said exhaust system comprising an exhaust side having a hollow interior and an inner surface on which condensate may be formed, a suction side having a hollow interior, and an exhaust fan apparatus interposed between said exhaust side and said suction side and coupled to each of said exhaust side and said suction side to form a conduit through which a gaseous fluid may be conveyed, wherein said gaseous fluid is drawn by said exhaust fan apparatus from said suction side and expelled by said exhaust fan apparatus through said exhaust side, said condensate bypass apparatus comprising:

a tube having a first open end and a second open end and a continuous hollow interior communicating between said first open end and said second open end, said first open end communicating through said exhaust side to said hollow interior thereof and said second open end communicating through said suction side to said hollow interior thereof so that said hollow interior of said tube communicates between said exhaust side and said suction side in a manner bypassing said exhaust fan apparatus; and

a condensate trap comprising a first open end having a first diameter, a second open end having a second diameter, and a continuous hollow interior communicating between said first open end and said second open end, wherein said first diameter of said first open end is less than said second diameter of said second open end and said condensate trap has a conically-shaped sloping outer surface, said second diameter being dimensioned to fit within said exhaust side, said second open end arranged within said exhaust side in a manner forming a gutter comprising said inner surface of said exhaust side and said sloping outer surface of said condensate trap, with the axis of said condensate trap substantially coincident with the axis of said exhaust side, said gutter positioned to collect condensate which may drain within said exhaust side.

2. The condensate bypass apparatus of claim 1, wherein said exhaust system is a radon mitigation system.

3. The condensate bypass apparatus of claim 1, wherein said gaseous fluid comprises radon gas.

4. An exhaust system for removing a radon containing gaseous fluid comprising:

an exhaust fan apparatus comprising a housing having an exhaust port and a suction port and enclosing a fan, wherein the operation of said fan draws a gaseous fluid into said suction port and expels said gaseous fluid from said exhaust port;

a cylindrical suction conduit comprising a hollow interior, a first open end, and at least one other open end, said hollow interior communicating between said first open end and each of said at least one other open ends, said suction pipe being otherwise substantially airtight, wherein said first open end is substantially airtightly coupled with said suction port and each of said at least one other open ends is located proximate to said gaseous fluid so that said gaseous fluid is conducted by operation of said fan from each of said at least one other open ends of said suction conduit through said suction conduit to said suction port;

a cylindrical exhaust conduit comprising a hollow interior, a first open end, at least one other open end, and an inner surface, said hollow interior communicating between said first open end and each of said at least one other open ends, said exhaust pipe being otherwise substantially airtight, wherein said first open end is substantially airtightly coupled to said exhaust port each of said at least one other open ends is located at a predetermined level above ground level so that said gaseous fluid is conducted by operation of said fan from said exhaust port through said exhaust conduit to each of said at least one other open ends of said exhaust conduit;

a condensate trap located within said exhaust conduit, said condensate trap comprising a first open end having a first diameter, a second open end having a second diameter, and a continuous hollow interior communicating between said first open end and said second open end, wherein said first diameter of said first open end is less than said second diameter of said second open end and said condensate trap has a conically-shaped sloping outer surface, said second diameter being dimensioned to fit within said exhaust conduit, said second open end of said condensate trap being arranged within said exhaust conduit in a manner forming a gutter comprising said inner surface of said exhaust conduit and said sloping outer surface of said condensate trap, with the axis of said condensate trap substantially coincident with the axis of said exhaust conduit, said gutter positioned to collect condensate which may drain within said exhaust conduit; and

a bypass tube comprising a hollow interior having a first open end and a second open end, said hollow interior communicating between said first open end and said second open end, said first open end of said bypass tube communicating through said exhaust conduit to said hollow interior thereof immediately adjacent to said conical surface of said condensate trap and within said gutter, and said second open end of said bypass tube communicating through said suction conduit to said hollow interior thereof in a manner bypassing said exhaust fan, whereby said condensate may be received from said gutter by said bypass tube and conducted through said bypass tube into said suction conduit.

5. The exhaust system of claim 4, wherein said second open end of said condensate trap is integral with said housing of said exhaust fan apparatus.

6. The exhaust system of claim 4, wherein said second open end of said condensate trap is integral with said inner surface of said exhaust conduit.

7. The exhaust system of claim 4, wherein said housing of said exhaust fan apparatus comprises an annular exhaust port rim having a diameter substantially the same as said second diameter of said second open end of said condensate trap, and wherein said condensate trap is placed on said annular exhaust port rim with said second open end of said condensate trap engaged against said annular exhaust port rim substantially throughout the entire circumference thereof.

8. The exhaust system of claim 4, wherein said first open end of said exhaust conduit comprises:

a flexible coupling comprising a hollow interior, a first open end, a second open end, and an inner surface, said hollow interior communicating between said first open end and said second open end, said first open end being substantially airtightly coupled to said exhaust conduit, and said second open end being substantially airtightly coupled to said exhaust port.

9. The exhaust system of claim 8, wherein said second open end of said condensate trap is integral with said inner surface of said flexible coupling.

10. The exhaust system of claim 8, wherein said inner surface of said flexible coupling comprises an annular groove, wherein said second open end of said condensate trap is retained within said annular groove.

11. The exhaust system of claim 4, wherein said first open end of said suction conduit comprises:

a flexible coupling comprising a hollow interior, a first open end, and a second open end, said hollow interior communicating between said first open end and said second open end, said first open end of said flexible coupling being substantially airtightly coupled to said suction port, and said second open end of said flexible coupling being substantially airtightly coupled to said suction conduit.

12. The exhaust system of claim 4, further comprising:

a bypass tube fitting comprising a hollow interior, a first open end, and a second open end, said hollow interior communicating between said first open end and said second open end, said first open end comprising an annular flange perpendicular to the axial direction of said bypass tube fitting, wherein a surface of said annular flange is engaged against said inner surface of said exhaust conduit, and a portion of said bypass tube fitting passes through a wall of said exhaust conduit, thereby resulting in said second open end of said bypass tube fitting being outside said exhaust conduit, and wherein said first open end of said bypass tube fitting is positioned within said exhaust conduit to receive condensate from said gutter, and said first open end of said bypass tube is coupled with said second open end of said bypass tube fitting so that said hollow interior of said bypass tube communicates with said hollow interior of said exhaust conduit through said hollow interior of said bypass tube fitting.

13. The exhaust system of claim 4, further comprising

a bypass tube fitting comprising a hollow interior, a first open end, and a second open end, said hollow interior communicating between said first open end and said second open end, said bypass tube fitting comprising external threads adjacent to said first open end, wherein a portion of said bypass tube fitting passes through a wall of said exhaust conduit, thereby resulting in said second open end of said bypass tube fitting being outside said exhaust conduit and said first open end of said bypass tube fitting being positioned within said exhaust conduit to receive condensate from said gutter, and wherein said second open end of said bypass tube is coupled with said first open end of said bypass tube fitting so that said hollow interior of said bypass tube communicates with said hollow interior of said exhaust conduit through said hollow interior of said bypass tube fitting.

14. The exhaust system of claim 4, further comprising:

a bypass tube fitting comprising a hollow interior, a first open end, and a second open end, said hollow interior communicating between said first open end and said second open end, said bypass tube fitting comprising external threads adjacent to said first open end, wherein a portion of said bypass tube fitting passes through a wall of said suction conduit, thereby resulting in said second open end of said bypass tube fitting being outside said suction conduit and said first open end of said bypass tube fitting being positioned within said suction conduit to deliver condensate to said suction conduit, and wherein said second open end of said bypass tube is coupled with said second open end of said bypass tube fitting so that said hollow interior of said bypass tube communicates with said hollow interior of said suction conduit through said hollow interior of said bypass tube fitting.

15. The exhaust system of claim 4, wherein said exhaust conduit comprises a rigid coupling comprising:

a hollow interior having an inner surface, a first open end, a second open end, and an annular member protruding from said inner surface into said hollow interior, said hollow interior communicating between said first open end and said second open end, wherein said condensate trap is arranged within said rigid coupling with said sloping outer surface of said condensate trap engaged against a surface of said annular member.

16. A condensate trap apparatus for collecting condensate which drains within an exhaust system comprising:

a cylindrical flexible coupling comprising a hollow interior having an inner surface, a first open end, and a second open end, said hollow interior communicating between said first open end and said second open end;

a condensate trap located within said flexible coupling, said condensate trap comprising a first open end having a first diameter, a second open end having a second diameter, and a continuous hollow interior communicating between said first open end and said second open end, wherein said first diameter of said first open end is less than said second diameter of said second open end and said condensate trap has a conically-shaped sloping outer surface, said second diameter being dimensioned to fit within said flexible coupling, said second open end of said condensate trap being arranged within said flexible coupling in a manner forming a gutter comprising said inner surface of said flexible coupling and said sloping outer surface of said condensate trap, with the axis of said condensate trap substantially coincident with the axis of said flexible coupling, said gutter positioned to collect condensate which may drain within said flexible coupling; and

a bypass tube comprising a hollow interior having a first open end and a second open end, said hollow interior communicating between said first open end and said second open end, said first open end of said bypass tube communicating through said flexible coupling to said hollow interior thereof immediately adjacent to said conical surface of said condensate trap and within said gutter, whereby said condensate may be received from said gutter by said first open end of said bypass tube and conducted through said bypass tube until emerging from said second open end of said bypass tube.

17. The condensate trap apparatus of claim 16, wherein said second open end of said condensate trap is integral with said inner surface of said flexible coupling.

18. The condensate trap apparatus of claim 16, wherein said inner surface of said flexible coupling comprises an annular groove, wherein said second open end of said condensate trap is retained within said annular groove.

19. A condensate trap apparatus for collecting condensate which drains within an exhaust system comprising:

a cylindrical rigid coupling comprising a hollow interior having an inner surface, a first open end, a second open end, and an annular member protruding from said inner surface into said hollow interior, said hollow interior communicating between said first open end and said second open end;

a condensate trap located within said rigid coupling, said condensate trap comprising a first open end having a first diameter, a second open end having a second diameter, and a continuous hollow interior communicating between said first open end and said second open end, wherein said first diameter of said first open end is less than said second diameter of said second open end and said condensate trap has a conically-shaped sloping outer surface, said second diameter being dimensioned to fit within said rigid coupling, said second open end of said condensate trap being arranged within said rigid coupling in a manner forming a gutter comprising said inner surface of said rigid coupling and said sloping outer surface of said condensate trap, with the axis of said condensate trap substantially coincident with the axis of said rigid coupling, said gutter positioned to collect condensate which may drain within said rigid coupling; and

a bypass tube comprising a hollow interior having a first open end and a second open end, said hollow interior communicating between said first open end and said second open end, said first open end of said bypass tube communicating through said rigid coupling to said hollow interior thereof immediately adjacent to said conical surface of said condensate trap and within said gutter, whereby said condensate may be received from said gutter by said first open end of said bypass tube and conducted through said