Dual temperature refrigerated display case

Patent metadata

Field	Value
Publication number	US-9538858-B2
Application number	US-201313797484-A
Country	US
Kind code	B2
Filing date	Mar 12, 2013
Priority date	Mar 12, 2013
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A dual temperature refrigerated display case including a low temperature refrigerated display case defining a low temperature product display area and including a low temperature air curtain configured to flow across an access opening of the low temperature case. The dual temperature refrigerated display case also includes a medium temperature refrigerated display case disposed above the low temperature case. The medium temperature case defines a medium temperature product display area and includes a medium temperature air curtain configured to flow across an access opening of the medium temperature case. The dual temperature refrigerated display case includes a duct disposed between the medium temperature refrigerated display case and the low temperature refrigerated display case. The duct receives spillover air from the medium temperature air curtain and redirects the spillover air away from the low temperature air curtain.

First claim

What is claimed is:

1. A dual temperature refrigerated display case comprising:
a low temperature refrigerated display case defining a low temperature product display area and including a low temperature air curtain configured to flow across an access opening of the low temperature refrigerated display case;
a medium temperature refrigerated display case disposed above the low temperature refrigerated display case, the medium temperature refrigerated display case defining a medium temperature product display area and including a medium temperature air curtain configured to flow across an access opening of the medium temperature refrigerated display case; and
a dispersion system including a duct disposed between the medium temperature refrigerated display case and the low temperature refrigerated display case, the duct receiving spillover air from the medium temperature air curtain and redirecting the spillover air to an exterior of the medium temperature refrigerated display case away from the medium temperature access opening.

2. The dual temperature refrigerated display case of claim 1 , wherein the duct includes a fan to move the spillover air through the duct and away from the low temperature air curtain.

3. The dual temperature refrigerated display case of claim 2 , wherein the duct includes an inlet and an outlet, and wherein the fan is located at the inlet.

4. The dual temperature refrigerated display case of claim 2 , wherein the duct includes an inlet and an outlet, and wherein the fan is located at the outlet.

5. The dual temperature refrigerated display case of claim 1 , wherein the duct includes an inlet and an outlet, and wherein duct includes a first fan located at the inlet and a second fan located at the outlet.

6. The dual temperature refrigerated display case of claim 1 , wherein the duct includes an inlet and wherein the medium temperature refrigerated display case includes a deflector positioned between the inlet of the duct and an inlet of the medium temperature refrigerated display case, wherein the deflector is oriented vertically.

7. The dual temperature refrigerated display case of claim 1 , wherein the duct includes an inlet and wherein the medium temperature refrigerated display case includes a deflector positioned in front of the inlet of the duct, wherein the deflector is angled upwardly and inwardly.

8. The dual temperature refrigerated display case of claim 1 , wherein the duct is configured to receive spillover air from the medium temperature air curtain and redirect the spillover air away from the low temperature air curtain and behind the low temperature refrigerated display case.

9. The dual temperature refrigerated display case of claim 1 , wherein the duct is configured to receive spillover air from the medium temperature air curtain and redirect the spillover air away from the low temperature air curtain and below the medium temperature refrigerated display case.

10. The dual temperature refrigerated display case of claim 1 , wherein the duct is configured to divert the spillover air away from the low temperature refrigerated display case and the medium temperature refrigerated display case.

11. A dual temperature refrigerated display case comprising:
a low temperature refrigerated display case defining a low temperature product display area and including a low temperature air curtain configured to flow across an access opening of the low temperature refrigerated display case; and
a medium temperature refrigerated display case disposed above the low temperature refrigerated display case, the medium temperature refrigerated display case including
a bottom wall, a rear wall, and a top wall defining a forwardly-opening medium temperature product display area, wherein the top wall includes perforations,
an air passageway located outside of the medium temperature product display area,
a medium temperature cooling coil disposed in the air passageway,
a fan configured to move air through the medium temperature cooling coil, through the air passageway, and downwardly out of the perforations,
an inlet disposed in front of the product display area configured to receive the air discharged into the medium temperature product display area and deliver the air to the fan for recirculation,
a shelf within the medium temperature product display area, wherein the shelf extends forwardly from the rear wall and wherein a front end of the shelf includes spaced apart walls defining a vertical passageway disposed adjacent the front of the shelf for conveying refrigerated air discharged into the medium temperature product display area through the shelf and toward the inlet,
wherein the perforations and the vertical passageway are configured to inhibit spillover air discharged into the medium temperature product display area not returned through the inlet from disturbing the integrity of the low temperature air curtain.

12. The dual temperature refrigerated display case of claim 11 , wherein the perforations are evenly distributed across the top wall.

13. The dual temperature refrigerated display case of claim 11 , wherein the rear wall includes downwardly-directed louvers, and the fan is configured to move air downwardly out of the downwardly-directed louvers.

14. The dual temperature refrigerated display case of claim 11 , wherein the medium temperature refrigerated display case includes at least one additional shelf within the medium temperature product display area, wherein the at least one additional shelf extends forwardly from the rear wall and wherein the front end of the at least one additional shelf includes a vertical passageway for conveying refrigerated air discharged into the medium temperature product display area, through the shelf, and toward the inlet.

15. The dual temperature refrigerated display case of claim 14 , wherein the shelf and the at least one additional shelf includes a fan disposed in the vertical passageway for moving air discharged into the medium temperature product display area, through the shelf, and toward the inlet.

16. The dual temperature refrigerated display case of claim 11 , wherein the shelf includes a fan disposed in the vertical passageway for moving air discharged into the medium temperature product display area, through the shelf, and toward the inlet.

17. The dual temperature refrigerated display case of claim 11 , wherein the low temperature refrigerated display case includes a deflector positioned at the front of the low temperature refrigerated display case, wherein the deflector is angled upwardly and inwardly.

18. The dual temperature refrigerated display case of claim 11 , wherein the medium temperature case includes a deflector adjacent the inlet, wherein the deflector is angled upwardly and outwardly.

19. A dual temperature refrigerated display case comprising:
a low temperature refrigerated display case defining a low temperature product display area and including a low temperature air curtain configured to flow across an access area of the low temperature refrigerated display case;
a medium temperature refrigerated display case disposed above the low temperature refrigerated display case, the medium temperature refrigerated display case defining a medium temperature product display area and including a medium temperature air curtain configured to flow across an access area of the medium temperature refrigerated display case and a first inlet in fluid communication with a cooling coil and configured to receive air from the medium temperature refrigerated display case

Assignees

• Hussmann Corp

Inventors

• Rajagopalan Anand G

Classifications

• A47F3/0447 Primary

  with air curtains · CPC title