Tubular Heat Exchanger Patents (Class 126/522)
  • Patent number: 9102284
    Abstract: An electrical junction box 1 includes: a metallic substrate 24; a relay 25 mounted on a surface of the metallic substrate 24, and arranged lower than the metallic substrate 24; an upper cover 4 covering the metallic substrate 24, and arranged upper than the metallic substrate 24; a hole 17 opening on a surface of a ceiling wall 7 arranged parallel to the metallic substrate 24 of the upper cover 4; and a heat introducing tube 18 continued to an inner edge of the hole 17, and penetrating the metallic substrate 24.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: August 11, 2015
    Assignee: Yazaki Corporation
    Inventors: Yasuhiro Hara, Takuya Nakayama, Mitsuru Saito
  • Publication number: 20090205634
    Abstract: This CIP titled “Residential Fireplace Insert System Improvements” involves an improvement in the efficiency of the slide-in “Residential Woodburning Fireplace Insert System”, formerly application Ser. No. 11/507,343 filed Aug. 21, 2006, (now Pat. No. 7,509,954) wherein the heat output and fuel consumption are improved by controllably shutting off free air flow into the the combustion chamber by using a framed panel of heat-tolerant plastic film (as an alternate to using the glass doors) at the surround door location, then controlling the generated heat and fuel combination by carefully injecting just the proper ratio of the oxygen-to-fuel necessary for controlling both the heat output rate and fuel consumption parameters which include soot and creosote control improvements.
    Type: Application
    Filed: February 13, 2009
    Publication date: August 20, 2009
    Inventor: Robert Zerby Schreffler
  • Patent number: 7509954
    Abstract: This invention relates to a one-piece, self-contained air-heating, slide-in residential fireplace insert system comprising three sections: a control/base section, a front closure system and a tubing system; in particular to a system containing a plurality of individual tubularly confined columns of moving air (under fan pressure) surrounding a heat-radiating source on five sides, (excluding the front closure), where-in the said columns of moving air are heated within the said tubing system by radiation from the said heat-radiating source through the metal walls of the said confined columns of moving air before the said heated air is exited into an attending room.
    Type: Grant
    Filed: August 21, 2006
    Date of Patent: March 31, 2009
    Inventor: Robert Z. Schreffler
  • Patent number: 6666206
    Abstract: An improved fireplace insert used in a fireplace to surround a heat source, including an arcuate conduit that is able to substantially surround the heat source on multiple sides. The conduit includes an inhaling end and an exhaling end, and divided into an intake channel, a base channel, and an outtake channel. The intake channel includes a proximal end and a distal end; the base channel includes a first end and a second end; and the outtake channel includes a proximal end and a distal end. The proximal end of the intake channel is connected to the first end of the base channel, and the proximal end of the outtake channel is connected to the second end of the base channel for the conduit to be in a significantly U-shape. A fan is positioned near the distal end of the intake channel and is able to force heated air through the conduit.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: December 23, 2003
    Inventor: Shelton Gene Myrick
  • Patent number: 6484714
    Abstract: An improved grate for burning solid fuel having a support for the fuel, a blower for transporting air through the support, a multiplicity of orifices jets uniformly distributed across the entire area of the grate and directed through the support generally upwardly to transport preheated air toward the lower surface of the solid fuel. A trough located immediately below the support, and in close proximity to the lower surface of the solid fuel, for collecting a layer of glowing coals and providing a combustion zone in troughs between the supports. Internal air transport tubes within the support provide passageways for air to flow from the blower out of the grate. A low thermal mass heat reflector may be used with the grate for absorbing radiant energy from the combustion zone and reradiating thermal energy over the fireplace grate and out of the fireplace.
    Type: Grant
    Filed: December 31, 2001
    Date of Patent: November 26, 2002
    Inventor: Richard D. Smith
  • Patent number: 6047695
    Abstract: For use with a fireplace, a heat exchanger mounted across the top portion of the fireplace with the heat exchanger comprising a heat exchanger core with four identical extruded core sections connected together around an inner spin chamber for the passage of combustion gases and surrounded by an outer spin chamber for the passage of combustion gases, with each core section having a center core passageway for the passage of room air and the heating of the room air by the heat from the combustion gases being transferred to the room air through the heat exchanger cores, and tortuous passageways between the core sections from the outer spin chamber to the inner spin chamber to increase the area of contact by the hot combustion gases to the core sections and to increase the dwell time of the combustion gases in the core to increase the amount of heat transferred to the combustion gases to the room air in the core sections.
    Type: Grant
    Filed: January 8, 1998
    Date of Patent: April 11, 2000
    Inventor: H. Alfred Eberhardt
  • Patent number: 5904137
    Abstract: A fireplace heat exchanger that includes an air blower unit having an input for drawing air into the air blower unit and an output for expelling air from the air blower unit; a heat exchange unit, in airflow connection with the output of the air blower unit, having at least four heat exchange sections and an airflow passageway running through the at least four heat exchange sections and terminating in a heat exchange output port; at least one log retainer extending outwardly from an upper surface of the heat exchange unit; a heated air discharge manifold having a manifold chamber in airflow communication with the heat exchange output port of the heat exchange unit, an elongated air discharge vent formed through a front manifold surface thereof and two spaced manifold bolts extending from the front manifold surface thereof; a combination vent restricting and directing assembly that includes a pivoting deflecting panel, left and right deflecting panel supports extending from a U-shaped base plate having two par
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: May 18, 1999
    Inventor: Dwight Salley
  • Patent number: 5873356
    Abstract: A wood pellet stove for efficiently burning wood pellets and especially burning pellets at low burns. The stove is accurately controlled by a control panel with a microprocessor which helps safely regulate air flow from a combustion air and exhaust gas fan. Also, the microprocessor helps control convection air flow from a convection air fan and regulate feed of wood pellets into a burn pot using a motorized auger. The microprocessor is further used to monitor inlet air temperature and exhaust gas temperature. The stove includes a stove housing with a fire box and a fire box access door in the front of the housing. The burn pot includes a burn grate and pit used for receiving and burning wood pellets. The burn pot is disposed on a fire box floor. A wood pellet hopper is disposed in the rear of the housing for holding wood pellets therein. The motorized auger is used for feeding the wood pellets into the burn pot.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: February 23, 1999
    Assignee: Control Options, Inc.
    Inventors: Jeffrey L. Vossler, Walter K. Tomooka
  • Patent number: 5727540
    Abstract: A system for heating the air in the room containing a fireplace includes a heat exchanger mounted at the top portion of the combustion chamber of the fireplace to extend across the chimney flue opening and a fan for circulating room air through the heat exchanger in heat exchange relationship with the combustion gases passing from the combustion chamber in a vortex flow through a heat exchange passage in the heat exchanger to the chimney flue opening. There are preferably provided a pair of the heat exchangers mounted in side-by-side relationship to conform with the rectangular shape of the plan view of the fireplace.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: March 17, 1998
    Inventor: H. Alfred Eberhardt
  • Patent number: 5572986
    Abstract: A system for heating the air in the room containing a fireplace includes a heat exchanger mounted at the top portion of the combustion chamber of the fireplace to extend across the chimney flue opening and a fan for circulating room air through the heat exchanger in heat exchange relationship with the combustion gases passing from the combustion chamber in a vortex flow through a heat exchange passage in the heat exchanger to the chimney flue opening. There are preferably provided a pair of the heat exchangers mounted in side-by-side relationship to conform with the rectangular shape of the plain view of the fireplace.
    Type: Grant
    Filed: February 7, 1995
    Date of Patent: November 12, 1996
    Inventor: H. Alfred Eberhardt
  • Patent number: 5303693
    Abstract: A fireplace comprises a firebox having a top panel, bottom panel, rear panel and a flue. An outer casing is spaced from and surrounds the firebox. A combustion air feed passage for supplying combustion air to the firebox is provided. A heat exchanger, which is located downstream from the flue for receiving the combustion gases and for transmitting the heat from the combustion gases to air to be heated, is also provided. The fireplace includes a passage for conveying the combustion gases from the flue to a conduit in communication with a source external to the room in which the fireplace is situated for exhausting the combustion gases from the fireplace and a switch for selectively coupling the heat exchanger in series with the passage. The switch is operable between a first position which the flue gases pass through the heat exchanger before being vented to the outside and a second position which the flue gases pass through the passage, bypassing the heat exchanger, and are then vented to the outside.
    Type: Grant
    Filed: November 17, 1992
    Date of Patent: April 19, 1994
    Assignee: Wolf Steel Ltd.
    Inventors: Wolfgang Schroeter, Clifford Lilley
  • Patent number: 5267552
    Abstract: A direct vent gas fireplace has a firebox surrounded by an enclosure. The enclosure has an inclined surface between the top, rear and sides. The surface is inclined at approximately 45 degrees and has an exhaust opening. The firebox has an inclined surface parallel to the inclined panel and has an aperture in each side of the firebox. A duct connects each of the apertures to the exhaust opening. A heat exchanger lies between the inclined surfaces in line with the duct. The surface has a gap in it which connects through an air combustion conduit to the bottom of the firebox. The conduit may be pre-formed. An angle adaptor has an inner cap over the exhaust opening and an outer cap over the inner cap and the gap. The adaptor may be mounted vertically or horizontally. Alternatively, an inclined plate may be placed over the inclined surface with a hole concentric with the opening and of greater area. A first wall of a double walled vent duct may enclose the opening, while the second wall encloses the hole.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: December 7, 1993
    Assignee: Hunter Enterprises (Orillia) Limited
    Inventors: David G. Squires, Andrew C. G. Wilkes, James E. Kovacs
  • Patent number: 5199416
    Abstract: A hot air heat exchanger comprises a heat exchanger housing having a floor, which is essentially formed by a ceiling of an outer chamber and has at least one heat exchanger pipe extending from the floor to a ceiling element having exhaust openings, each pipe is secured to an exhaust opening in the upper wall of the outer chamber and a burner is disposed in an inner chamber which is positioned inside of the outer chamber with a spacing between the wall of the inner chamber and the outer chamber to allow air to flow therethrough. The upper wall of the inner chamber is provided with an exhaust gas opening, which is aligned with the exhaust opening of the outer chamber, and both openings have peripheral walls that are tapered to form a Venturi-like nozzle for drawing air in the space between the inner and outer chambers into each pipe as the exhaust gas from the burner in the inner chamber flows into the pipe to pass up through an exhaust element in the ceiling of the heat exchanger housing.
    Type: Grant
    Filed: December 17, 1991
    Date of Patent: April 6, 1993
    Assignee: Rational Grosskuechentechnik Service GmbH
    Inventors: Gerd Gumienny, Jaroslav Klouda, Franz Koch
  • Patent number: 5139012
    Abstract: A fireplace heat exchanger having input means that is directly connected to a blower assembly, air to be heated is drawn in by the blower assembly and forced directly through the input means into a heat reservoir that is suspended directly above or within the flame of the fireplace. The air is heated within the heat reservoir and then forced through an output means that includes a plurality of discharge ports through which the heated air is dispersed into a room. An aesthetically appealing manifold covers those portions of the input and output means that are outside the fireplace. That portion of the manifold that covers the output means includes a corresponding plurality of discharge ports through which the heated air is dispersed. The input and output means slidably fit within the input and output riser tubes so the heat exchanger can be adjusted for fireplaces of various depths. The heat exchanger can be used with fireplaces having a frame with closable doors, wire mesh curtains, or the like.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: August 18, 1992
    Assignee: Cardinal American Corporation
    Inventors: Arthur J. Furman, Timothy A. Grover, Dennis C. Fielder, George J. Theodore, Ronald D. Sonedecker
  • Patent number: 5046481
    Abstract: Heating apparatus for heating an environment comprises one or more heat exchange conduits (A, B, C, D, E, F, 6, 8) located in the flow path of primary heated fluid (F1-F2), and a device (4) for inducing a flow of air in each conduit, each conduit being adapted to carry air into, through and out of a heat flow path to the environment (2), the arrangement being such that, in use, air within the conduits progresses from a cooler to a hotter part of the heat flow path, and the conduits are spaced closer together toward the downstream direction of the flow path to improve the efficiency of heat exchange between the primary heated fluid and secondary air in the conduits.
    Type: Grant
    Filed: July 27, 1989
    Date of Patent: September 10, 1991
    Inventor: Dean M. Warwick
  • Patent number: 4964397
    Abstract: In a fireplace unit having an open sided firebox formed by opposed side walls, a top wall, a bottom wall, a rear wall, and a connection in the top wall to an exhaust flue, the present improvement including an intermediate wall member of overall curved configuration mounted in the firebox opening, the intermediate wall member being spaced from the rear wall of the firebox and extending between the opposed side walls and, at least, the bottom wall thereof to define a substantially enclosed space in the firebox opening therebehind, the curved configuration of the intermediate wall member increasing the reflective and radiant characteristics of the interior of the firebox thereby improving its overall efficiency and heat transfer capabilities. The various embodiments of the intermediate wall member disclosed herein may be attached to the firebox by fasteners, by welding, or by other suitable arrangements, or such intermediate wall member may be integrally formed as part of the firebox itself.
    Type: Grant
    Filed: September 15, 1989
    Date of Patent: October 23, 1990
    Inventors: David S. Purcell, Kelley J. Wells
  • Patent number: 4964396
    Abstract: The unit restores existing, masonry fireplaces without entailing dismantling of the latter. A heating jacket base, heating jacket, smoke chamber and flue lining are set into the existing firebox, smoke chamber and flue. Ducting is provided to move heating air through the heating jacket, and ducting is provided to pass combustion gases into the smoke chamber and flue. Internal air, or outside air, is accommodated in the unit for heating and combustion. Blowers are provided to move the heating air into the fireplace site (room) and/or to draw in outside air simply to exchange interior, stale air.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: October 23, 1990
    Inventor: Bruce P. Crum
  • Patent number: 4836182
    Abstract: A forced air gas fired heating device may be utilized as a stove insert for a conventional open fireplace or in an alternative embodiment may be formed with a double walled construction for use as a free standing unit. In both embodiments a gas burner adjacent a bottom portion of the housing heats an air space within the housing. A room air inlet conduit traverses back and forth across the heated air space and communicates with an air distribution chamber in an upper portion of the housing. A plurality of room air outlet conduits extend outwardly from the distribution chamber through a front wall of the housing. A heat exchanger is suspended from each of the room air outlet conduits and includes a hollow body portion in fluid communication with the associated air outlet conduit. Each of the heat exchangers has an enclosed longitudinally extending corrugated heat conductive metal plate and terminates in a bottom heat conducted metal plate deposed adjacent the gas burner.
    Type: Grant
    Filed: June 8, 1988
    Date of Patent: June 6, 1989
    Inventor: Daniel W. Trowbridge