Search

US-20260124110-A1 - WOOD BURNING SAUNA STOVE

US20260124110A1US 20260124110 A1US20260124110 A1US 20260124110A1US-20260124110-A1

Abstract

A wood burning sauna stove includes an outer frame and a firebox inside the outer frame. The outer frame includes an upper frame wall, a front frame wall, a rear frame wall, and lateral frame walls connecting the front frame wall and the rear frame wall. The upper frame wall is designed to support sauna rocks. The firebox includes an upper firebox wall, a lower firebox wall, and a perimeter firebox wall. The perimeter firebox wall includes front, rear, and side firebox walls. An exhaust conduit is positioned between the upper frame wall and the upper firebox wall to heat the upper frame wall and the sauna rocks on the upper frame wall. The exhaust conduit has an exhaust inlet aperture in the upper firebox wall adjacent the front firebox wall and an exhaust outlet aperture in the upper frame wall adjacent the rear firebox wall.

Inventors

  • Daryl Lamppa

Assignees

  • Daryl Lamppa

Dates

Publication Date
20260507
Application Date
20241107

Claims (20)

  1. 1 . A wood burning sauna stove comprising: an outer frame including an upper frame wall, a front frame wall, a rear frame wall, and lateral frame walls connecting said front frame wall and said rear frame wall, said upper frame wall being configured to support sauna rocks; a firebox being disposed within said outer frame, said firebox including an upper firebox wall, a lower firebox wall, and a perimeter firebox wall connecting said lower firebox wall and said upper firebox wall, said perimeter firebox wall including a front firebox wall, a rear firebox wall, and side firebox walls, said front firebox wall having an opening therein to permit access to an interior of said firebox, said lower firebox wall including a grate to permit passage of ash out of said firebox; an exhaust conduit being disposed between said upper frame wall and said upper firebox wall to heat the upper frame wall and the sauna rocks on said upper frame wall, said exhaust conduit has an exhaust inlet aperture in said upper firebox wall adjacent said front firebox wall and an exhaust outlet aperture in said upper frame wall adjacent said rear firebox wall; an ashpan assembly being disposed below and connected to said firebox to collect ashes from said firebox; and a door being positioned in said front frame wall over said opening in said front firebox wall.
  2. 2 . The wood burning sauna stove of claim 1 , further comprising: a primary air conduit being disposed between said front frame wall and said front firebox wall below said door, said primary air conduit having a primary air inlet in said front frame wall and a primary air outlet in said front firebox wall; and a diffuser panel being mounted on said front firebox wall adjacent said primary air conduit, said diffuser panel extending partially over said primary air outlet to permit a first portion of incoming primary air to travel freely parallel to said lower firebox wall straight into wood in said firebox and deflect a second portion of the incoming primary air downwardly toward an underside of the wood.
  3. 3 . The wood burning sauna stove of claim 2 , further comprising a secondary air conduit being disposed adjacent said primary air conduit between said front frame wall and said front firebox wall below said door, said secondary air conduit being fluidly connected to said primary air inlet to divide incoming air into incoming primary air and incoming secondary air, said secondary air conduit having a secondary air outlet in said front firebox wall above said primary air outlet.
  4. 4 . The wood burning sauna stove of claim 3 , wherein said diffuser panel extends completely over said secondary air outlet to deflect incoming secondary air upwardly parallel to said front firebox wall.
  5. 5 . The wood burning sauna stove of claim 3 , further comprising a damper including a manual lever and a damper cover pivotably mounted adjacent said primary air inlet to control flow of incoming air through said primary air conduit and said secondary air conduit.
  6. 6 . The wood burning sauna stove of claim 5 , wherein said damper cover has a first portion sufficiently large to completely block said primary air conduit and a second portion sufficiently small to not completely block said secondary air conduit when said damper cover is pivoted to a closed position.
  7. 7 . The wood burning sauna stove of claim 1 , wherein said upper frame wall is in the form of an S-shaped bracket having: an upper frame panel disposed above said exhaust inlet aperture; a lower frame panel disposed about said exhaust outlet aperture; and a vertical frame panel connecting said upper frame panel and said lower frame panel to cause turbulent flow of the exhaust gases in said exhaust conduit.
  8. 8 . The wood burning sauna stove of claim 7 , wherein said upper firebox wall is in the form of an S-shaped bracket having: an upper wall panel about said exhaust inlet aperture; a lower wall panel; and a vertical wall panel connecting said upper wall panel and said lower wall panel.
  9. 9 . The wood burning sauna stove of claim 8 , wherein said upper firebox wall includes an L-shaped bracket having a vertical bracket portion projecting from said vertical wall panel and a horizontal bracket portion projecting over said exhaust inlet aperture to cause turbulent flow of the exhaust gases in said exhaust conduit.
  10. 10 . The wood burning sauna stove of claim 1 , further comprising an exhaust pipe being connected to and extending vertically from said upper frame panel at said exhaust outlet aperture, said exhaust pipe includes a projecting portion disposed to project partially into said exhaust conduit below said upper frame wall to deflect a portion of the exhaust gases downwardly to cause turbulent flow of the exhaust gases in said exhaust conduit.
  11. 11 . The wood burning sauna stove of claim 10 , wherein said projecting portion is a convex panel curved outwardly toward said front frame wall and extending about halfway around the circumference of said exhaust outlet aperture.
  12. 12 . The wood burning sauna stove of claim 1 , further comprising a rear air chamber and a secondary air tube fluidly connected to said rear air chamber, wherein: said rear air chamber is disposed between said rear frame wall and said rear firebox wall, said rear air chamber includes a rear air inlet adjacent said lower firebox wall and a rear air outlet adjacent said upper frame wall; and said secondary air tube is mounted adjacent and below said upper firebox wall, said secondary air tube extends from said rear air chamber parallel to said upper firebox wall, said secondary air tube has a main aperture and plurality of supplemental apertures to permit flow of air out of said secondary air tube and into said firebox, said secondary air tube includes an angled deflector projecting outwardly over said main aperture to deflect air exiting said main aperture in a direction back toward said rear firebox wall to cause turbulent flow of the air in said firebox.
  13. 13 . The wood burning sauna stove of claim 12 , wherein said main aperture has a larger diameter than each of said supplemental apertures.
  14. 14 . The wood burning sauna stove of claim 12 , wherein said angled deflector includes a deflector panel angled with respect to an outer surface of said secondary air tube and two triangular side panels connecting said deflector panel to said outer surface.
  15. 15 . The wood burning sauna stove of claim 12 , wherein said secondary air tube includes an open end connected to said rear air chamber and a closed end opposite said open end and adjacent said door.
  16. 16 . The wood burning sauna stove of claim 1 , further comprising a baffle plate being disposed in said opening in said front firebox wall, said baffle plate obstructs an upper portion of said opening to deflect air passing through a door air inlet in said door to cause turbulent flow of air behind said door.
  17. 17 . The wood burning sauna stove of claim 16 , wherein said baffle plate includes an air slot disposed adjacent an upper edge of said opening in said front firebox wall to permit passage of air to said exhaust conduit.
  18. 18 . The wood burning sauna stove of claim 1 , further comprising a perimeter storage wall extending vertically from said outer frame to hold sauna rocks on said upper frame wall, said perimeter storage wall including a plurality of wall openings arranged in a pattern.
  19. 19 . The wood burning sauna stove of claim 1 , wherein: the wood burning sauna stove further comprises a rear air chamber and a secondary air tube fluidly connected to said rear air chamber; said rear air chamber is disposed between said rear frame wall and said rear firebox wall, said rear air chamber includes a rear air inlet adjacent said lower firebox wall and a rear air outlet adjacent said upper frame wall; said secondary air tube is mounted adjacent and below said upper firebox wall, said secondary air tube extends from said rear air chamber parallel to said upper firebox wall, said secondary air tube has a main aperture and plurality of supplemental apertures to permit flow of air out of said secondary air tube and into said firebox, said secondary air tube includes an angled deflector projecting outwardly over said main aperture to deflect air exiting said main aperture in a direction back toward said rear firebox wall to cause turbulent flow of the air in said firebox; said main aperture has a larger diameter than each of said supplemental apertures; said angled deflector includes a deflector panel angled with respect to an outer surface of said secondary air tube and two triangular side panels connecting said deflector panel to said outer surface; said secondary air tube includes an open end connected to said rear air chamber and a closed end opposite said open end and adjacent said door; said upper frame wall is in the form of an S-shaped bracket having: an upper frame panel disposed above said exhaust inlet aperture; a lower frame panel disposed about said exhaust outlet aperture; and a vertical frame panel connecting said upper frame panel and said lower frame panel to cause turbulent flow of the exhaust gases in said exhaust conduit; said upper firebox wall is in the form of an S-shaped bracket having: an upper wall panel about said exhaust inlet aperture; a lower wall panel; and a vertical wall panel connecting said upper wall panel and said lower wall panel; and said upper firebox wall includes an L-shaped bracket having a vertical bracket portion projecting from said vertical wall panel and a horizontal bracket portion projecting over said exhaust inlet aperture to cause turbulent flow of the exhaust gases in said exhaust conduit.
  20. 20 . The wood burning sauna stove of claim 19 , wherein further comprising: a primary air conduit being disposed between said front frame wall and said front firebox wall below said door, said primary air conduit having a primary air inlet in said front frame wall and a primary air outlet in said front firebox wall; a diffuser panel being mounted on said front firebox wall adjacent said primary air conduit, said diffuser panel extending partially over said primary air outlet to permit a first portion of incoming primary air to travel freely parallel to said lower firebox wall straight into wood in said firebox and deflect a second portion of the incoming primary air downwardly toward an underside of the wood; a secondary air conduit being disposed adjacent said primary air conduit between said front frame wall and said front firebox wall below said door, said secondary air conduit being fluidly connected to said primary air inlet to divide incoming air into incoming primary air and incoming secondary air, said secondary air conduit having a secondary air outlet in said front firebox wall above said primary air outlet, said diffuser panel extending completely over said secondary air outlet to deflect incoming secondary air upwardly parallel to said front firebox wall; a damper including a manual lever and a damper cover pivotably mounted adjacent said primary air inlet to control flow of incoming air through said primary air conduit and said secondary air conduit, wherein said damper cover has a first portion sufficiently large to completely block said primary air conduit and a second portion sufficiently small to not completely block said secondary air conduit when said damper cover is pivoted to a closed position; an exhaust pipe being connected to and extending vertically from said upper frame panel at said exhaust outlet aperture, said exhaust pipe includes a projecting portion disposed to project partially into said exhaust conduit below said upper frame wall to deflect a portion of the exhaust gases downwardly to cause turbulent flow of the exhaust gases in said exhaust conduit, wherein said projecting portion is a convex panel curved outwardly toward said front frame wall and extending about halfway around the circumference of said exhaust outlet aperture; a baffle plate being disposed in said opening in said front firebox wall, said baffle plate obstructs an upper portion of said opening to deflect air passing through a door air inlet in said door to cause turbulent flow of air behind said door, wherein said baffle plate includes an air slot disposed adjacent an upper edge of said opening in said front firebox wall to permit passage of air to said exhaust conduit; and a perimeter storage wall extending vertically from said outer frame to hold sauna rocks on said upper frame wall, said perimeter storage wall including a plurality of wall openings arranged in a pattern.

Description

(b) CROSS-REFERENCE TO RELATED APPLICATIONS Not Applicable (c) STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT Not Applicable (d) THE NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT Not Applicable (e) INCORPORATION-BY-REFERENCE OF MATERIAL SUBMITTED ON A COMPACT DISC OR AS A TEXT FILE VIA THE OFFICE ELECTRONIC FILING SYSTEM Not Applicable (f) STATEMENT REGARDING PRIOR DISCLOSURES BY THE INVENTOR OR JOINT INVENTOR Not Applicable (g) BACKGROUND OF THE INVENTION (1) Field of the Invention The disclosure relates to woodburning stoves and more particularly pertains to a new wood burning sauna stove for smokeless heating of a sauna room. Wood burning stoves produce airborne pollutants in the form of smoke and combustion gases, which are generally undesirable and especially so in urban areas. The wood burning sauna stove is designed to promote complete combustion and smokeless operation. The wood burning sauna stove is designed to hold and heat sauna rocks on top of the wood burning sauna stove for use in creating steam in a sauna room. (2) Description of Related Art including information disclosed under 37 CFR 1.97 and 1.98. The prior art relates to wood burning stoves for heating sauna rooms that generate smoke during operation. The prior art, as best understood, does not disclose a wood burning sauna stove that promotes complete combustion and smokeless operation by including various deflectors, baffles, and diffuser panels that cause turbulent flow of air and exhaust gases inside the wood burning sauna stove. An exhaust conduit is positioned between an upper frame wall of an outer frame and an upper firebox wall of a firebox inside the outer frame to heat the upper frame wall and the sauna rocks on the upper frame wall. The exhaust conduit has an exhaust inlet aperture in the upper firebox wall adjacent the front of the firebox and an exhaust outlet aperture in the upper frame wall adjacent the rear of the firebox, which creates a flow of exhaust gases from front to back underneath sauna rocks on top of the upper frame wall. (h) BRIEF SUMMARY OF THE INVENTION An embodiment of the disclosure meets the needs presented above in a wood burning sauna stove generally comprising an outer frame, a firebox, an exhaust conduit, an ashpan, and a door. The outer frame includes an upper frame wall, a front frame wall, a rear frame wall, and lateral frame walls connecting the front frame wall and the rear frame wall. The upper frame wall is designed to support sauna rocks. The firebox is positioned within the outer frame. The firebox includes an upper firebox wall, a lower firebox wall, and a perimeter firebox wall connecting the lower firebox wall and the upper firebox wall. The perimeter firebox wall includes a front firebox wall, a rear firebox wall, and side firebox walls. The front firebox wall has an opening therein to permit access to an interior of the firebox. The lower firebox wall includes a grate to permit passage of ash out of the firebox. The exhaust conduit is positioned between the upper frame wall and the upper firebox wall to heat the upper frame wall and the sauna rocks on the upper frame wall. The exhaust conduit has an exhaust inlet aperture in the upper firebox wall adjacent the front firebox wall and an exhaust outlet aperture in the upper frame wall adjacent the rear firebox wall. The ashpan assembly is positioned below and connected to the firebox to collect ashes from the firebox. The door is positioned in the front frame wall over the opening in the front firebox wall. There has thus been outlined, rather broadly, the more important features of the disclosure in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated. There are additional features of the disclosure that will be described hereinafter and which will form the subject matter of the claims appended hereto. The objects of the disclosure, along with the various features of novelty which characterize the disclosure, are pointed out with particularity in the claims annexed to and forming a part of this disclosure. (i) BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWING(S) The disclosure will be better understood and objects other than those set forth above will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein: FIG. 1 is a front perspective view of a wood burning sauna stove according to an embodiment of the disclosure. FIG. 2 is a front view of an embodiment of the disclosure. FIG. 3 is a cross-sectional view of the embodiment of the disclosure in FIG. 2. FIG. 4 is a close-up view of the circled portion of the embodiment of the disclosure in FIG. 3. FIG. 5 is a cross-sectional view of the embodiment of the disclosure in FIG. 3. FIG. 6 is an exposed partial perspective view of an embodiment of the disclosure. FIG.