Oven equipped with automatically ascending/descending tray

1. An oven comprising:

a rear panel that defines at least a portion of a cavity of the oven and that is located at a rear side of the cavity;

a first tray frame configured to support an oven tray located in the cavity;

a guide that is located at a front surface of the rear panel at lateral sides of the rear panel;

a moving rack comprising a guide connector configured to engage with the guide and a first frame connector configured to connect to the first tray frame, the moving rack being configured to move up and down along the guide; and

a rear cover that is located between the oven tray and the rear panel and that covers the guide and the guide connector,

wherein the moving rack extends toward the lateral sides of the rear panel in a space defined between the rear cover and the rear panel, and the first frame connector is exposed laterally outside of the rear cover.

2. The oven of claim 1 , wherein the first frame connector is disposed laterally outward relative to the guide.

3. The oven of claim 1 , wherein the guide comprises a ball screw that extends in a vertical direction, the ball screw having a first end connected to a driving device configured to rotate the ball screw and a second end connected to a support configured to rotatably support the ball screw, and

wherein the guide connector comprises a ball nut configured to engage with the ball screw.

4. The oven of claim 3 , wherein the support is fixed to the rear panel.

5. The oven of claim 1 , wherein the guide comprises:

a first guide that is located laterally inward of the first frame connector; and

a second guide that is located laterally inward of the first guide and that is located rearward of the first guide toward the rear panel.

6. The oven of claim 5 , wherein the rear cover comprises:

a plate portion that extends in a direction parallel to the rear panel; and

an inclined portion that is inclined relative to the plate portion, that extends in a direction forward and laterally outward from the plate portion, and that covers the first guide and the second guide.

7. The oven of claim 1 , wherein the first frame connector comprises a pair of connectors that are located at lateral sides of the moving rack,

wherein the moving rack further comprises a cross bar that extends between the pair of connectors in a lateral direction and that is connected to the pair of connectors, and

wherein the rear cover covers the cross bar of the moving rack.

8. The oven of claim 7 , wherein the rear panel defines panel air holes, and

wherein the rear cover defines cover air holes at positions corresponding to the panel air holes.

9. The oven of claim 1 , further comprising a spacer located between the rear cover and the rear panel and configured to couple the rear cover to the rear panel.

10. The oven of claim 1 , wherein the rear panel comprises a first guider that extends in a vertical direction and that is located at the front surface of the rear panel, and

wherein the moving rack comprises a second guider that is configured to move in the vertical direction along the first guider.

11. The oven of claim 10 , wherein the first guider is located rearward of the guide.

12. The oven of claim 1 , wherein the first frame connector is located forward of the rear panel and spaced apart from the rear panel by a predetermined distance, and

wherein the oven further comprises a fixed tray rack located between the rear panel and the first frame connector.

13. The oven of claim 12 , wherein the fixed tray rack is fixed to the rear panel, at least a portion of the fixed tray rack being spaced apart from the rear panel and the first frame connector.

14. The oven of claim 12 , wherein the fixed tray rack comprises a second frame connector that is configured to detachably connect to a second tray frame and that is configured to support the second tray frame at predetermined positions that are spaced apart in a vertical direction.

15. The oven of claim 14 , wherein the second frame connector defines fitting holes and is located rearward of the first frame connector, and

wherein the first frame connector comprises a fixation member that extends rearward and that is configured to couple to the fitting holes of the second frame connector.

16. A rear panel of an oven located at a rear side of a cavity of the oven, the rear panel comprising:

a guide that is connected to the rear panel and that is located at a front surface of the rear panel at lateral sides of the rear panel;

a moving rack comprising a frame connector configured to connect to an oven tray and a guide connector configured to engage with the guide, the moving rack being configured to move up and down along the guide; and

a rear cover that is connected to the rear panel and that covers a front side of the guide and the guide connector,

wherein the moving rack extends toward the lateral sides of the rear panel in a space defined between the rear cover and the rear panel, and the frame connector is exposed laterally outside of the rear cover.

17. The rear panel of claim 16 , further comprising a first guider that extends in a vertical direction, that is located at the front surface of the rear panel, and that is located rearward of the guide,

wherein the moving rack further comprises a second guider that is configured to move in the vertical direction along the first guider.

18. The rear panel of claim 16 , wherein the guide comprises:

a first guide that is located laterally inward of the frame connector; and

a second guide that is located laterally inward of the first guide and that is located rearward of the first guide toward the rear panel.

19. The rear panel of claim 16 , wherein the frame connector comprises a pair of connectors that are located at lateral sides of the moving rack,

wherein the moving rack further comprises a cross bar that extends between the pair of connectors in a lateral direction and that is connected to the pair of connectors, and

wherein the rear cover covers the cross bar of the moving rack.

20. The rear panel of claim 16 , wherein the frame connector is located forward of the rear panel and spaced apart from the rear panel by a predetermined distance, and

wherein the rear panel is located rearward of a fixed tray rack that is located rearward of the frame connector.