Oven system with heat exchanger

Patent metadata

Field	Value
Publication number	US-10222071-B2
Application number	US-201614992667-A
Country	US
Kind code	B2
Filing date	Jan 11, 2016
Priority date	Jan 12, 2015
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

An oven system may include a cooking chamber, a combustion chamber, and a flue. The flue may be arranged to route a first portion of the combustion gas produced in the combustion chamber into the cooking chamber and route a second portion of the combustion gas along a route that bypasses the cooking chamber. The flue may also be arranged to collect the first portion of the combustion gas from the cooking chamber and to exhaust both the first portion and the second portion of the combustion gas from the oven system.

First claim

What is claimed is:

1. An oven system comprising:
a) a cooking chamber;
b) a combustion chamber; and
c) a flue, the flue comprising
i) a combustion chamber collection portion comprising one or more collection ports positioned to receive combustion gas produced in the combustion chamber,
ii) a routing portion positioned to receive the combustion gas from the one or more collection ports, the routing portion comprising a cooking chamber routing duct comprising one or more routing ducts positioned to route a first portion of the combustion gas into the cooking chamber and a cooking chamber bypass duct comprising one or more bypass ducts positioned to route a second portion of the combustion gas along a path that bypasses the cooking chamber, and
iii) an exhaust portion comprising one or more exhaust ducts positioned to receive the first portion of the combustion gas from the cooking chamber and the second portion of the combustion gas from the one or more bypass ducts, wherein the exhaust portion further comprises one or more exhaust ports to exhaust the first and second portions of the combustion gas from the flue,
wherein at least one routing duct extends adjacent to the cooking chamber along a shared wall with the cooking chamber to transfer heat from the first portion of the combustion gas to the shared wall with the cooking chamber.

2. The oven system of claim 1 , further comprising a door defining a first wall of the cooking chamber, wherein the cooking chamber routing duct comprises a first routing duct and a second routing duct, wherein the cooking chamber bypass duct comprises a first bypass duct and a second bypass duct, and wherein the first and second routing ducts extend along a second wall of the cooking chamber to transfer heat from the first portion of the combustion gas to the second wall of the cooking chamber and the first and second bypass ducts extend along a third wall of the cooking chamber, different than the second wall, to transfer heat from the second portion of the combustion gas to the third wall of the cooking chamber.

3. The oven system of claim 1 , further comprising a door defining a first wall of the cooking chamber, wherein the cooking chamber routing duct comprises a first routing duct and a second routing duct, wherein the cooking chamber bypass duct comprises a first bypass duct and a second bypass duct, and wherein the first and second routing ducts and the first and second bypass ducts extend along a second wall of the cooking chamber, opposite the first wall, to transfer heat from the first and second portions of the combustion gas to the second wall of the cooking chamber.

4. The oven system of claim 1 , wherein at least one routing duct extends adjacent to the cooking chamber along a first shared wall with the cooking chamber to transfer heat from the first portion of the combustion gas to the first shared wall of the cooking chamber, wherein at least one bypass duct extends adjacent to the cooking chamber along a second shared wall with the cooking chamber to transfer heat from the second portion of the combustion gas to the second shared wall of the cooking chamber, and wherein at least one exhaust duct comprises a cooking chamber exhaust duct to receive the first portion of the combustion gas from the cooking chamber and direct the flow of the first portion of the combustion gas along a third shared wall with the cooking chamber to transfer heat from the first portion of the combustion gas received from the cooking chamber to the third shared wall of the cooking chamber.

5. The oven system of claim 4 , wherein the first and second shared walls are disposed along a rear wall of the cooking chamber, and wherein the third shared wall is disposed along a top wall of the cooking chamber.

6. The oven system of claim 5 , further comprising a sub-chamber disposed within the cooking chamber, wherein the sub-chamber houses a convection fan operable to pull gas from the cooking chamber into the sub-chamber through one or more first openings and to expel the gas pulled into the sub-chamber back into the cooking chamber through one or more second openings, and wherein at least one bypass duct extends adjacent to the sub-chamber along a fourth shared wall with the sub-chamber to transfer heat from the second portion of the combustion gas to the fourth shared wall with the sub-chamber.

7. The oven system of claim 6 , wherein the sub-chamber is disposed along a rear portion of the cooking chamber and is defined between a top wall, a bottom wall, a rear wall, a front wall, and a first and a second side wall, wherein the fourth shared wall comprises a fifth shared wall and a sixth shared wall, wherein the first side wall comprises the fifth shared wall and the second side wall comprises the sixth shared wall.

8. The oven system of claim 1 , further comprising a sub-chamber disposed within the cooking chamber, wherein the sub-chamber houses a convection fan operable to pull gas from the cooking chamber into the sub-chamber through one or more first openings and to expel the gas pulled into the sub-chamber back into the cooking chamber through one or more second openings.

9. The oven system of claim 8 , wherein at least one bypass duct extends adjacent to the sub-chamber along a shared wall with the sub-chamber to transfer heat from the second portion of the combustion gas to the shared wall with the sub-chamber.

10. The oven system of claim 9 , wherein the sub-chamber is disposed along a rear portion of the cooking chamber and is defined between a top wall, a bottom wall, a rear wall, a front wall, and a first and a second side wall, wherein at least one first bypass duct extends adjacent to the first side wall along a shared wall with the first side wall to transfer heat from the second portion of the combustion gas to the shared wall with the first side wall, and wherein at least one second bypass duct extends adjacent to the second side wall along another shared wall with the second side wall to transfer heat from the second portion of the combustion gas to the shared wall with the second side wall.

11. The oven system of claim 1 , wherein at least one exhaust port comprises a cooking chamber exhaust port in a top wall of the cooking chamber, wherein at least one exhaust duct comprises a cooking chamber exhaust duct extending above the top wall and comprising a shared wall with the top wall, wherein the cooking chamber exhaust duct is in fluid communication with the cooking chamber through the cooking chamber exhaust port to receive the first portion of the combustion gas from the cooking chamber and direct the flow of the first portion of the combustion gas along the shared wall.

12. The oven system of claim 11 , wherein the wall shared by the top wall and the cooking chamber exhaust duct comprises at least half of the surface area of the top wall.

13. The oven system of claim 1 , wherein the exhaust portion is configured to exhaust the first and second portions of the combustion gas from the flue into a common external environment.

14. The oven system of claim 1 , wherein the exhaust portion fluidically couples the cooking chamber and one or more of the bypass ducts to recombine at least a portion of the first and second portions of the combustion gas when exhausted therethrough.

15. An oven system comprising:
a) a cooking chamber;
b) a combustion chamber; and
c) a flue, the flue comprising
i) a combustion chamber collection portion comprising one or more collection ports positioned to receive combustion gas produced in the combustion chamber,
ii) a routing portion positioned to receive the comb

Assignees

• Hestan Commercial Corp

Inventors

• Deng Eric
• Moy Chris

Classifications

• F24C15/322

  with forced circulation · CPC title

• F24C15/2007 Primary

  from oven cavities · CPC title

• B23P19/00

  Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation {(connecting metal parts or objects by metal-working procedures B21J, B23K)}; Tools or devices therefor so far as not provided for in other classes (hand tools in general B25) · CPC title