Refrigerator having an insulated cool air duct

1. A refrigerator comprising:

a.) an outer housing;

b.) an inner housing at a spacing from the outer housing and surrounded thereby with a hollow space produced between the outer housing and the inner housing, the hollow space being foam-filled for insulation purposes;

c.) a cooling-air duct for distribution of cooling air; and

d.) an inner chamber surrounded by the inner housing, the inner chamber being cooled by circulation of cooling air supplied to the inner chamber by the cooling-air duct, the cooling air duct being arranged between the outer housing and the inner housing and the cooling-air duct being formed of a shaped part having (i) insulating material that lies against an outer side of the inner housing and (ii) a closed rear wall element that touches the inner housing.

2. The refrigerator as claimed in claim 1 , wherein the closed rear wall element is configured as a U-shape profile rear wall element having two profile legs that each touch the inner housing.

3. The refrigerator as claimed in claim 2 , wherein the shaped part includes an extended plate having longitudinal edges that each lie against a respective one of inner sides of the two profile legs of the U-shape profile rear wall element.

4. The refrigerator as claimed in claim 2 , wherein the cooling-air duct includes at least one support element arranged between the inner side of a profile rear of the U-shape profile rear wall element and an area of the inner housing covered by the rear wall element, in order to support the profile rear of the U-shape profile rear wall element on the inner housing.

5. The refrigerator as claimed in claim 4 , wherein the at least one support element extends in a direction of air flow along a center line of the cooling-air duct.

6. The refrigerator as claimed in claim 5 , wherein the at least one support element is a center rib of the shaped part.

7. The refrigerator as claimed in claim 2 , wherein the shaped part includes an extended plate having longitudinal edges in the form of angled bars in contact with the inner side of a profile rear of the U-shape profile rear wall element.

8. The refrigerator as claimed in claim 7 , wherein the outer sides of the bars are at a distance from adjoining leg inner sides of the U-shape profile rear wall element.

9. The refrigerator as claimed in claim 1 , wherein the inner housing is provided with at least one marking indicating an intended assembly position of the shaped part.

10. The refrigerator as claimed in claim 2 , wherein, on the inner side of a profile rear of the U-shape profile rear wall element, a rail operating in conjunction with the shaped part is formed for fixing the position of the U-shape profile rear wall element in relation to the shaped part.

11. The refrigerator as claimed in claim 2 , wherein the two profile legs of the rear wall element facing towards the inner housing are each provided with a flange resting against the inner housing.

12. The refrigerator as claimed in claim 1 , wherein the shaped part and the inner housing are provided with air passage openings at corresponding points.

13. The refrigerator as claimed in claim 1 , wherein the closed rear wall element is a plastic closed rear wall element.

14. The refrigerator as claimed in claim 13 , wherein the plastic closed rear wall element is a U-shape profile rear wall element having two profile legs that each contact the inner housing.

15. The refrigerator as claimed in claim 14 , wherein the insulating material of the shaped part includes an extended plate having longitudinal edges that each lie against a respective one of inner sides of the two profile legs of the U-shape profile rear wall element.

16. The refrigerator as claimed in claim 14 , wherein the cooling-air duct includes at least one support element between a profile rear of the U-shape profile rear wall element and the inner housing, a first end of the at least one support element contacting the profile rear and a second end of the at least one support element contacting the inner housing.

17. The refrigerator as claimed in claim 14 , wherein each of the two profile legs of the rear wall element includes a flange extending from an outer side of each of the two profile legs of the U-shape profile rear wall element, the flange contacting the inner housing.

18. The refrigerator as claimed in claim 2 , wherein the insulating material of the shaped part includes an extended plate having longitudinal edges that each lie against a respective one of inner sides of the two profile legs of the U-shape profile rear wall element.

19. The refrigerator as claimed in claim 2 , wherein the cooling-air duct includes at least one support element between a profile rear of the U-shape profile rear wall element and the inner housing, a first end of the at least one support element contacting the profile rear and a second end of the at least one support element contacting the inner housing.

20. The refrigerator as claimed in claim 2 , wherein each of the two profile legs of the rear wall element includes a flange extending from an outer side of each of the two profile legs of the U-shape profile rear wall element, the flange contacting the inner housing.

21. A refrigerator comprising:

an outer housing;

an inner housing inside the outer housing and spaced apart from the outer housing;

foam insulation between the outer housing and the inner housing;

an inner chamber surrounded by the inner housing; and

a cooling-air duct for supplying cooling air to the inner chamber,

wherein the cooling air duct is between the outer housing and the inner housing,

wherein the cooling-air duct includes:

a rear wall element having two legs, each of the two legs contacting the inner housing; and

an insulating plate contacting an outer side of the inner housing and disposed between inner sides of the two legs of the rear wall element.