Base de données sur les brevets canadiens / Sommaire du brevet 2716425 

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Disponibilité de l'Abrégé et des Revendications

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  • lorsque la demande peut être examinée par le public;
  • lorsque le brevet est émis (délivrance).
(12) Demande de brevet: (11) CA 2716425
(54) Titre français: SYSTEME DE CVCA A VOLUME D'AIR CONSTANT A FONCTION DE DESHUMIDIFICATION ET CONTROLE DE LA TEMPERATURE DE L'AIR DE SORTIE ET METHODE D'UTILISATION DUDIT SYSTEME
(54) Titre anglais: A CONSTANT AIR VOLUME HVAC SYSTEM WITH A DEHUMIDIFICATION FUNCTION AND DISCHARGE AIR TEMPERATURE CONTROL, AN HVAC CONTROLLER THEREFOR AND A METHOD OF OPERATION THEREOF
(51) Classification internationale des brevets (CIB):
  • F24F 11/02 (2006.01)
(72) Inventeurs (Pays):
  • BENNETT, ALAN E. (Etats-Unis d'Amérique)
  • HESS, MARK D. (Etats-Unis d'Amérique)
  • WALTER, STEPHEN A. (Etats-Unis d'Amérique)
(73) Titulaires (Pays):
  • LENNOX INDUSTRIES INC. (Etats-Unis d'Amérique)
(71) Demandeurs (Pays):
  • LENNOX INDUSTRIES INC. (Etats-Unis d'Amérique)
(74) Agent: MARKS & CLERK
(45) Délivré:
(22) Date de dépôt: 2010-10-04
(41) Mise à la disponibilité du public: 2011-07-27
Requête d’examen: 2015-09-16
(30) Licence disponible: S.O.
(30) Langue des documents déposés: Anglais

(30) Données de priorité de la demande:
Numéro de la demande Pays Date
12/694,473 Etats-Unis d'Amérique 2010-01-27

Abrégé anglais



An HVAC controller, a method of operating a constant
air volume (CAV) HVAC unit and a CAV HVAC system are
disclosed herein. In one embodiment, the HVAC controller
includes: (1) an interface configured to receive both a
latent cooling demand and a sensible cooling demand and
(2) a processor configured to direct both a
dehumidification function and a discharge air temperature
control function for a CAV HVAC system employing the
latent cooling demand and the sensible cooling demand.


Note : Les revendications sont présentées dans la langue officielle dans laquelle elles ont été soumises.


-14-
WHAT IS CLAIMED IS:
1. A heating, ventilating and air conditioning
(HVAC) controller, comprising:
an interface configured to receive both a latent
cooling demand and a sensible cooling demand; and
a processor configured to direct both a
dehumidification function and a discharge air temperature
control function for a constant air volume (CAV) HVAC
system employing said latent cooling demand and said
sensible cooling demand.

2. The HVAC controller as recited in Claim 1
wherein said processor is configured to simultaneously
process said latent cooling demand and said sensible
cooling demand and direct said dehumidification function
and said discharge air temperature control function for
said CAV HVAC system.

3. The HVAC controller as recited in Claim 2
wherein said processor is configured to calculate a
cooling sum by summing a number of cooling stages of
said CAV HVAC system having a corresponding reheat coil
with a number of cooling stages required to maintain a
discharge air temperature of said CAV HVAC system.
4. The HVAC controller as recited in Claim 3
wherein said processor if further configured to determine
if said cooling sum is less than or equal to a number of
compressors installed in said CAV HVAC system.

5. The HVAC controller as recited in Claim 4
wherein said processor is configured to activate each
reheat coil of said CAV HVAC system and activate a number
of compressors of said CAV HVAC system equivalent to a
value of said cooling sum when determining said cooling


-15-

sum is less than or equal to a number of compressors
installed in said CAV HVAC system.

6. The HVAC controller as recited in Claim 4
wherein said processor is configured to have each reheat
coil of said CAV HVAC system deactivated and each of said
compressors activated when determining said cooling sum
is greater than said number of compressors
7. The HVAC controller as recited in Claim 6
wherein said processor is further configured to keep said
reheat coils deactivated until a number of compressors
activated without reheat is equal to a number of
compressors required for said sensible cooling demand.

8. A method of operating a constant air volume
(CAV) heating, ventilating and air conditioning (HVAC)
unit having compressor and evaporator coils and employing
both a discharge air temperature control function and a
dehumidification function, said method comprising:

receiving at least one of a latent cooling demand or
a sensible cooling demand;
determining if both a latent cooling demand and a
sensible cooling demand are being simultaneously
processed; and

activating said compressor and evaporator coils of
said HVAC unit having corresponding reheat coils in
response to said latent cooling demand if said latent
cooling demand has been received and said sensible
cooling demand has not been received.

9. The method as recited in Claim 8 further
comprising sequentially activating said compressor and
evaporator coils based on a discharge air temperature of
said CAV HVAC system if said latent cooling demand has
not been received and said sensible cooling demand has
been received.


-16-

10. The method as recited in Claim 8 further
comprising directing both a dehumidification function and
a discharge air temperature control function for said CAV
HVAC system when simultaneously processing both said
latent cooling demand and said sensible cooling demand.
11. The method as recited in Claim 10 further
comprising calculating a cooling sum by summing a number
of cooling stages of said CAV HVAC system having a
corresponding reheat coil with a number of cooling stages
required to maintain a discharge air temperature of said
CAV HVAC system.

12. The method as recited in Claim 11 further
comprising determining if said cooling sum is less than
or equal to a number of compressors installed in said CAV
HVAC system.

13. The method as recited in Claim 12 further
comprising activating each reheat coil of said CAV HVAC
system and activate a number of compressors of said CAV
HVAC system equivalent to a value of said cooling sum
when determining said cooling sum is less than or equal
to a number of compressors installed in said CAV HVAC
system.

14. The method as recited in Claim 12 further
comprising deactivating each reheat coil of said CAV HVAC
system and activating each of said compressors when
determining said cooling sum is greater than said number
of compressors.

15. The method as recited in Claim 14 further
comprising maintaining deactivation of said reheat coils
until a number of compressors activated without reheat is
equal to a number of compressors required for said
sensible cooling demand.


-17-

16. A constant air volume (CAV) heating,
ventilating and air conditioning (HVAC) system,
comprising:
compressor and evaporator coils;
reheat coils corresponding to at least one of
said compressor and evaporator coils;
an air blower configured to move air across
said compressor and evaporator coils and said reheat
coils; and
a controller configured to direct operation of
said compressor and evaporator coils, said reheat coils
and said air blower, comprising:

an interface configured to receive both a
latent cooling demand and a sensible cooling demand for
said CAV HVAC system; and

a processor configured to direct both a
dehumidification function and a discharge air temperature
control function for said CAV HVAC system employing said
latent cooling demand and said sensible cooling demand.
17. The CAV HVAC system as recited in Claim 16
wherein said processor is configured to simultaneously
process said latent cooling demand and said sensible
cooling demand and direct said dehumidification function
and said discharge air temperature control function for
said CAV HVAC system.

18. The CAV HVAC system as recited in Claim 17
wherein said processor is configured to calculate a
cooling sum by adding a number of cooling stages of said
CAV HVAC system having a corresponding reheat coil with a
number of cooling stages required to maintain a discharge
air temperature of said CAV HVAC system.

19. The CAV HVAC system as recited in Claim 18
wherein said processor if further configured to determine


-18-

if said cooling sum is less than or equal to a number of
compressors installed in said CAV HVAC system.

20. The CAV HVAC system as recited in Claim 19
wherein said processor is configured to activate each
reheat coil of said CAV HVAC system and activate a number
of compressors of said CAV HVAC system equivalent to a
value of said cooling sum when determining said cooling
sum is less than or equal to a number of compressors
installed in said CAV HVAC system.

21. The CAV HVAC system as recited in Claim 19
wherein said processor is configured to have each reheat
coil of said CAV HVAC system deactivated and each of said
compressors activated when determining said cooling sum
is greater than said number of compressors

22. The CAV HVAC system as recited in Claim 21
wherein said processor is further configured to keep said
reheat coils deactivated until a number of compressors
activated without reheat is equal to a number of
compressors required for said sensible cooling demand.


Une figure unique qui représente un dessin illustrant l’invention.

Pour une meilleure compréhension de l’état de la demande ou brevet qui figure sur cette page, la rubrique Mise en garde , et les descriptions de Brevet , États administratifs , Taxes périodiques et Historique des paiements devraient être consultées.

États admin

Titre Date
(22) Dépôt 2010-10-04
(41) Mise à la disponibilité du public 2011-07-27
Requête d'examen 2015-09-16

Taxes périodiques

Description Date Montant
Dernier paiement 2017-10-04 200,00 $
Prochain paiement si taxe applicable aux petites entités 2018-10-04 100,00 $
Prochain paiement si taxe générale 2018-10-04 200,00 $

Avis : Si le paiement en totalité n’a pas été reçu au plus tard à la date indiquée, une taxe supplémentaire peut être imposée, soit une des taxes suivantes :

  • taxe de rétablissement prévue à l’article 7 de l’annexe II des Règles sur les brevets ;
  • taxe pour paiement en souffrance prévue à l’article 22.1 de l’annexe II des Règles sur les brevets ; ou
  • surtaxe pour paiement en souffrance prévue aux articles 31 et 32 de l’annexe II des Règles sur les brevets.

Historique des paiements

Type de taxes Anniversaire Échéance Montant payé Date payée
Dépôt 400,00 $ 2010-10-04
Taxe périodique - Demande - nouvelle loi 2 2012-10-04 100,00 $ 2012-09-24
Taxe périodique - Demande - nouvelle loi 3 2013-10-04 100,00 $ 2013-09-18
Taxe périodique - Demande - nouvelle loi 4 2014-10-06 100,00 $ 2014-09-18
Requête d'examen 800,00 $ 2015-09-16
Taxe périodique - Demande - nouvelle loi 5 2015-10-05 200,00 $ 2015-09-28
Taxe périodique - Demande - nouvelle loi 6 2016-10-04 200,00 $ 2016-09-20
Taxe périodique - Demande - nouvelle loi 7 2017-10-04 200,00 $ 2017-10-04
Final 300,00 $ 2017-12-06

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Description du
Document
Date
(yyyy-mm-dd)
Nombre de pages Taille de l’image (Ko)
Description 2010-10-04 13 503
Abrégé 2010-10-04 1 18
Revendications 2010-10-04 5 178
Dessins 2010-10-04 2 38
Dessins représentatifs 2011-06-29 1 6
Page couverture 2011-07-05 2 39
Poursuite-Amendment 2016-09-26 3 212
Correspondance 2015-07-29 3 79
Correspondance 2015-08-21 1 20
Correspondance 2015-08-21 1 23
Poursuite-Amendment 2015-09-16 1 37
Poursuite-Amendment 2016-04-06 1 28
Poursuite-Amendment 2017-03-14 12 394
Revendications 2017-03-14 5 158
Description 2017-03-14 15 538
Correspondance 2017-12-06 1 36