Canadian Patents Database / Patent 2911796 Summary

Third-party information liability

Some of the information on this Web page has been provided by external sources. The Government of Canada is not responsible for the accuracy, reliability or currency of the information supplied by external sources. Users wishing to rely upon this information should consult directly with the source of the information. Content provided by external sources is not subject to official languages, privacy and accessibility requirements.

Claims and Abstract availability

Any discrepancies in the text and image of the Claims and Abstract are due to differing posting times. Text of the Claims and Abstract are posted:

  • At the time the application is open to public inspection;
  • At the time of issue of the patent (grant).
(12) Patent: (11) CA 2911796
(54) English Title: METHOD AND SYSTEM FOR EXTRACTING HEAT FROM A FLUE GAS
(54) French Title: METHODE ET SYSTEME D'EXTRACTION DE CHALEUR D'UN GAZ DE COMBUSTION
(51) International Patent Classification (IPC):
  • F23J 15/06 (2006.01)
  • F24C 15/20 (2006.01)
  • F24F 13/30 (2006.01)
  • F28D 1/04 (2006.01)
(72) Inventors (Country):
  • ZAMMIT, PAUL (Canada)
(73) Owners (Country):
  • ZAMMIT, PAUL (Canada)
(71) Applicants (Country):
  • ZAMMIT, PAUL (Canada)
(74) Agent: SHAPIRO COHEN LLP
(45) Issued: 2016-10-11
(22) Filed Date: 2015-11-12
(41) Open to Public Inspection: 2016-01-27
Examination requested: 2015-11-12
(30) Availability of licence: N/A
(30) Language of filing: English

English Abstract

A system is provided for extracting heat from a flue gas after it is expelled from a cooking appliance, such as a commercial deep fryer. A flue extension is provided between the flue of the cooking appliance and an exhaust hood positioned above the cooking appliance. Within the flue extension is disposed a heat exchanger assembly, which includes a coil that forms part of a closed fluid loop including a second heat exchanger that is disposed within a fluid medium that is to be heated, such as water. A mount supports the flue extension, and allows movement of the flue extension between an operating configuration and a stowed configuration. The flue extension is positioned closer to the flue of the cooking appliance when in the operating configuration compared to the stowed configuration. Mounting the flue extension is achieved without modifying the cooking appliance or the exhaust hood.


French Abstract

Le présent système permet dextraire la chaleur dun gaz de carneau après son évacuation dun appareil de cuisson tel quune friteuse commerciale. Un prolongement de conduit est placé entre le conduit de lappareil de cuisson et une hotte positionnée au-dessus de ce dernier. Un ensemble échangeur de chaleur disposé dans le prolongement de conduit comprend un serpentin faisant partie dune boucle de fluide fermée comprenant un second échangeur de chaleur disposé dans un milieu fluide qui doit être chauffé, comme de leau. Un dispositif de montage supporte le prolongement de conduit et permet le mouvement de ce denier entre une configuration de fonctionnement et une configuration de rangement. Le prolongement de conduit est positionné plus près du conduit de lappareil de cuisson lorsquil est en configuration de fonctionnement comparativement à la configuration de rangement. On peut monter le prolongement de conduit sans modifier lappareil de cuisson ni la hotte.


Note: Claims are shown in the official language in which they were submitted.

CLAIMS
What is claimed is:
1. A system for extracting heat from a flue gas exiting from a cooking
appliance, the
system comprising:
a flue extension having an open first end and an open second end opposite the
first end, the first end aligned with but spaced apart from a flue of the
cooking
appliance for receiving a flue gas at a first temperature as it exits via the
flue of the
cooking appliance, and the second end facing but spaced apart from an exhaust
hood
for discharging the flue gas at a second temperature to the exhaust hood, the
second
temperature being lower than the first temperature;
a mount for supporting the flue extension within a space between the flue of
the cooking appliance and the exhaust hood, the mount being secured to a
surface that
is proximate the cooking appliance and that is other than a surface of either
the
cooking appliance or the exhaust hood; and
a heat exchanger assembly disposed within the flue extension and comprising
a heat exchanger tube for circulating a volume of a thermal fluid, the heat
exchanger
tube comprising a plurality of substantially straight tube sections that are
arranged
substantially normal to a flow direction of the flue gas through the flue
extension.
2. The system of claim 1, wherein the mount supports a movement of the flue
extension between an operating configuration in which the first end of the
flue
extension is spaced apart from the flue of the cooking appliance by a first
distance and
a stowed configuration in which the first end of the flue extension is spaced
apart
from the flue of the cooking appliance by a second distance that is greater
than the
first distance.
3. The system of claim 2, wherein the mount comprises a single link pivoting
assembly.
14

4. The system of claim 1, wherein the heat exchanger tube has an inlet end for

receiving the volume of the thermal fluid into the heat exchanger tube and an
outlet
end for providing the volume of the thermal fluid out of the heat exchanger
tube.
5. The system of claim 4, comprising a storage tank for containing a fluid
medium
that is to be heated and further comprising a second heat exchanger assembly
disposed within the storage tank, an inlet end of the second heat exchanger
assembly
being in fluid communication with the outlet end of the heat exchanger tube
and an
outlet end of the second heat exchanger assembly being in fluid communication
with
the inlet end of the heat exchanger tube.
6. The system of claim 5, comprising a pump for circulating the thermal fluid
within a
closed circuit that includes the heat exchanger assembly and the second heat
exchanger assembly.
7. The system of claim 1, wherein the heat exchanger tube comprises a
plurality of
external fins for increasing a total area of thermal contact with the flue
gas.
8. A system for extracting heat from a flue gas exiting from a cooking
appliance,
comprising:
a flue extension having an open first end, an open second end that is opposite

the first end, and a central passageway extending between the first and second
ends;
a first heat exchanger assembly disposed within the central passageway of the
flue extension;
a mount for supporting the flue extension and the first heat exchanger within
a
space between a flue of the cooking appliance and an exhaust hood disposed
above
the cooking appliance, the mount being operable between:
i) a first configuration in which the first end of the flue extension
is
aligned with but spaced apart from the flue of the cooking appliance
by a first distance, and

ii) a second configuration in which the first end of the flue extension
is
spaced apart from the flue of the cooking appliance by a second
distance that is greater than the first distance;
a storage tank for containing a medium to be heated;
a second heat exchanger disposed within the storage tank, the second heat
exchanger being in fluid communication with the first heat exchanger; and
a pump for circulating a thermal fluid within a closed circuit that includes
the
first heat exchanger and the second heat exchanger.
9. The system of claim 8, comprising at least one temperature sensor and at
least one
flow meter for measuring a temperature and a flow rate, respectively, of the
thermal
fluid.
10. The system of claim 9, comprising a controller that is responsive to data
signals
provided from the at least one temperature sensor and from the at least one
flow meter
for controlling the circulating of the thermal fluid within the closed
circuit.
11. The system of claim 8, wherein the first heat exchanger assembly comprises
a heat
exchanger tube for circulating a volume of the thermal fluid, the heat
exchanger tube
comprising a plurality of substantially straight tube sections that are
arranged
substantially normal to a flow direction of the flue gas through the flue
extension.
12. The system of claim 11, wherein the heat exchanger tube has an inlet end
for
receiving the volume of the thermal fluid into the heat exchanger tube and an
outlet
end for providing the volume of the thermal fluid out of the heat exchanger
tube.
13. The system of claim 11, wherein the heat exchanger tube comprises a
plurality of
external fins for increasing a total area of thermal contact with the flue
gas.
14. The system of claim 8, wherein the mount comprises a single link pivoting
assembly.
16

15. The system of claim 8, comprising a gasket that extends between the first
end of
the flue extension and the flue of the cooking appliance when the mount is in
the first
configuration, the gasket for guiding a flow of the flue gas into the central
passageway of the flue extension.
16. A method for extracting heat from a flue gas exiting a cooking appliance,
comprising:
using a mount, supporting a flue extension between a flue of the cooking
apparatus and an exhaust hood disposed above the cooking apparatus, such that
an
open first end of the flue extension is aligned with but spaced apart from the
flue of
the cooking apparatus by a first distance, and wherein the mount is secured to
a
surface that is proximate the cooking appliance and that is other than a
surface of
either the cooking appliance or the exhaust hood;
providing a heat exchanger assembly within the flue extension, the heat
exchanger assembly including a heat exchanger coil;
receiving the flue gas via the open first end of the flue extension, the flue
gas
being constrained by the flue extension to flow around the heat exchanger coil
and out
through an open second end of the flue extension along a direction generally
toward
the exhaust hood; and
while the flue gas is being constrained to flow around the heat exchanger
coil,
circulating a thermal fluid within the heat exchanger coil, whereby heat is
transferred
from the flue gas to the thermal fluid.
17. The method of claim 16, comprising circulating the thermal fluid from the
heat
exchanger assembly to a second heat exchanger assembly disposed within a
storage
tank containing a medium that is to be heated.
18. The method of claim 16, comprising actuating the mount into a stowed
configuration in which the first end of the flue extension is spaced apart
from the flue
of the cooking appliance by a second distance that is greater than the first
distance.
17

19. The method of claim 16, wherein the thermal fluid is water.
20. The method of claim 16, comprising sensing a temperature and a flow rate
of the
thermal fluid, and in response to the sensed temperature and sensed flow rate
controlling the circulating of the thermal fluid.
18


A single figure which represents the drawing illustrating the invention.

For a clearer understanding of the status of the application/patent presented on this page, the site Disclaimer , as well as the definitions for Patent , Administrative Status , Maintenance Fee  and Payment History  should be consulted.

Admin Status

Title Date
(22) Filed 2015-11-12
Examination Requested 2015-11-12
(41) Open to Public Inspection 2016-01-27
(45) Issued 2016-10-11

Maintenance Fee

Description Date Amount
Last Payment 2017-08-02 $50.00
Next Payment if small entity fee 2018-11-13 $50.00
Next Payment if standard fee 2018-11-13 $100.00

Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following

  • the reinstatement fee set out in Item 7 of Schedule II of the Patent Rules;
  • the late payment fee set out in Item 22.1 of Schedule II of the Patent Rules; or
  • the additional fee for late payment set out in Items 31 and 32 of Schedule II of the Patent Rules.

Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Request for Examination $400.00 2015-11-12
Filing $200.00 2015-11-12
Final $150.00 2016-08-30
Maintenance Fee - Patent - New Act 2 2017-11-14 $50.00 2017-08-02

To view selected files, please enter reCAPTCHA code :




Filter Download Selected in PDF format (Zip Archive)
Document
Description
Date
(yyyy-mm-dd)
Number of pages Size of Image (KB)
Abstract 2015-11-12 1 20
Description 2015-11-12 13 598
Claims 2015-11-12 4 152
Drawings 2015-11-12 9 487
Representative Drawing 2016-01-05 1 3
Cover Page 2016-02-03 2 39
Description 2016-03-07 14 597
Claims 2016-03-07 5 149
Drawings 2016-03-07 10 160
Representative Drawing 2016-04-01 1 5
Cover Page 2016-09-14 2 41
Prosecution-Amendment 2015-11-12 1 18
Prosecution-Amendment 2015-11-25 1 26
Correspondence 2015-11-23 2 59
Prosecution-Amendment 2015-12-01 1 25
Prosecution-Amendment 2016-01-27 1 26
Prosecution-Amendment 2016-02-09 4 263
Prosecution-Amendment 2016-03-07 18 475
Correspondence 2016-08-30 3 75