TURKOZ, Serdar (E5 Ankara Asfalti Uzeri, Tuzla, Istanbul, 34950, TR)
MAMATOGLU, Murat (E5 Ankara Asfalti Uzeri, Tuzla, Istanbul, 34950, TR)
TURKOZ, Serdar (E5 Ankara Asfalti Uzeri, Tuzla, Istanbul, 34950, TR)
| Claims 1. An oven (1) that comprises a cooking chamber (2) wherein the items to be cooked are placed, a door (3) for accessing the cooking chamber (2), an outer panel (4) disposed on the door (3), forming the surface of the door (3) in contact with the exterior, an inner panel (5) forming the surface of the door (3) in contact with the cooking chamber (2), and a frame (7) disposed between the outer panel (4) and the inner panel (5), whereon the outer panel (4) is secured on one side and the inner panel (5) on the other side such that they are parallel to one another, having a hollow and quadrangular cross-section, with vertical profiles (8) forming the lateral sides of the door (3) and a horizontal profile (11) connecting the vertical profiles (8) to each other, constructed by joining the profiles (8 and 11) in an inverted "U" shape, and characterized by - at least one frame entrance hole (9) situated on the inner wall (IW) of the vertical profiles (8) on the side facing in between the panels (4 and 5), that opens inside the door (3) thereby allowing the air entering in between the panels (4 and 5) inside the door (3) to pass into the frame (7). 2. An oven (1) as in Claim 1 , characterized by at least one discharge hole (10), situated on the outer wall (OW) on the side of the vertical profile (8) facing the outside, opening to outside from the side of the door (3), enabling the air entering inside the frame (7) from the frame entrance hole (9) to be discharged from the door (3). 3. An oven (1) as in Claim 1 , characterized by two frame entrance holes (9) disposed on the inner wall (IW) of the vertical profile (8), one being close to the lower edge of the door (3) and the other to the upper edge of the door (3). 4. An oven (1) as in Claim 3, characterized by a discharge hole (10) that is disposed on the outer wall (OW) of the vertical profile (8) being close to the upper edge of the door (3). 5. An oven (1) as in any one of the above Claims, characterized by an intermediate panel (6) disposed between the inner panel (5) and the outer panel (4) and frame entrance holes (9) wherein some of them remain between the inner panel (5) and the intermediate panel (6) and some remain between the outer panel (4) and the intermediate panel (6). 6. An oven (1) as in any one of the above Claims, characterized by a discharge hole (10) that is disposed on the horizontal profile (11), on the outer wall (OW) on the side of the horizontal profile (11) facing outside. |
AN OVEN COMPRISING A DOOR WHEREOF THE TEMPERATURE IS KEPT AT
A SAFE LEVEL
[0001] The present invention relates to an oven comprising a door which is prevented from overheating.
[0002] Various embodiments have been developed for reducing thermal losses at the oven doors and keeping the door below certain temperature values. In most of these embodiments, the exterior air is received between the panels in the door from the gap under the door and is expelled from above the door afterwards. Consequently, the temperature of the door outer panel can be lowered to certain values due to the air flow inside the door.
[0003] The frames situated between the panels on the oven doors whereon the panels are secured are also a heat source for the door. The air that enters in between the panels can condense above the frame and this results in unwanted appearances.
[0004] In the state of the art United States of America patent no US4023554; the explanation is given for how the air received underneath the door between the panels is discharged from above the door.
[0005] In the state of the art embodiments, the air that enters from under the door leaves from above the door.
[0006] In other words, the air moving forward in different directions, not in a single direction, is allowed to be discharged from between the panels.
[0007] The object of the present invention is to realize an oven comprising a door whereof the temperature is kept at a safe level by being cooled effectively.
[0008] The oven designed to fulfill the object of the present invention, explicated in the first claim and the respective claims thereof, comprises at least one frame entrance hole disposed on the inner walls of the vertical profiles, enabling the air received into the door from outside to pass inside the frame.
[0009] The oven furthermore comprises at least one discharge hole situated on the outer walls of the vertical profiles, enabling the air received inside the frame through the frame entrance hole to be discharged outside of the door. [0010] Consequently, the frame is used like an air channel by means of the profiles. This enables the air received inside the door to be discharged out without condensing on the panels. At the same time, the frame that acts like a heat source is cooled together with the panels. Moreover, by receiving air from outside to the inside of the door through more than one point enables the air to be homogeneously distributed between the panels and the heat distribution on the panels to be almost homogeneous, furthermore the door can reach the desired temperature values in a shorter period of time since the amount of heat transfer is increased.
[0011] In the preferred embodiment of the present invention, the oven comprises two entrance holes on each vertical profile, one positioned to be near the lower edge of the door and the other near the upper edge and one discharge hole on each vertical profile arranged to be near the upper edge of the door. Accordingly, the air received into the door, can move along the entire length of the profile after being received inside the profile.
[0012] In another embodiment of the present invention, the oven comprises entrance holes, some of them remaining between the outer panel and the intermediate panel and some of them between the intermediate panel and the inner panel.
[0013] In another embodiment of the present invention, the discharge hole is disposed on the horizontal profile.
[0014] By means of the present invention, the frame is used like an air channel and the air that enters between the panels during the cooking process is discharged without condensing on the panels and at the same time the frame is prevented from acting like a heat source since air is received inside the frame. Moreover, the heat distribution on the panels is provided to be more homogeneous by discharging the air passing between the panels from more than one point. Additionally, the amount of heat transfer increases since the amount of the air circulating between the panels is increased and the temperature on the panels can be effectively lowered to values determined by the standards in a shorter period of time.
[0015] An oven designed to fulfill the object of the present invention is illustrated in the attached figures, where: [0016] Figure 1 - is the perspective view of an oven.
[0017] Figure 2 - is the perspective view of a door.
[0018] Figure 3 - is the perspective view of a frame.
[0019] Figure 4 - is the perspective view of a frame from a different viewpoint.
[0020] Figure 5 - is the perspective view of another embodiment of the present invention. [0021] Figure 6 - is the perspective view of another embodiment of the present invention from a different viewpoint.
[0022] Figure 7 - is the perspective view of a cover and a door. [0023] Figure 8 - is the cross sectional view of the door. [0024] The elements illustrated in the figures are numbered as follows:
1. Oven
2. Cooking chamber
3. Door
4. Outer panel
5. Inner panel
6. Intermediate panel
7. Frame
8. Vertical profile
9. Frame entrance hole
10. Discharge hole
11. Horizontal profile
[0025] The oven (1) comprises a cooking chamber (2) wherein the items to be cooked are placed, a door (3) for accessing the cooking chamber (2), an outer panel (4) disposed on the door (3) forming the surface of the door (3) in contact with the exterior, an inner panel (5) forming the surface of the door (3) in contact with the cooking chamber (2), and a frame (7) disposed between the outer panel (4) and the inner panel (5), whereon the outer panel (4) is secured on one side and the inner panel (5) on the other side such that they are parallel to one another, having a hollow and quadrangular cross-section, with vertical profiles (8) forming the lateral sides of the door (3) and a horizontal profile (11) connecting the vertical profiles (8) to each other, constructed by joining the profiles (8 and 11) in an inverted "U" shape (Figure 1 , Figure 2 and Figure 7).
[0026] The oven (1) furthermore comprises at least one frame entrance hole (9) situated on the inner wall (IW) of the vertical profiles (8), on the side facing in between the panels (4 and 5), that opens inside the door (3) thereby allowing the air entering in between the panels (4 and 5) inside the door (3) to pass into the frame (7).
[0027] The oven (1) furthermore comprises at least one discharge hole (10), situated on the outer wall (OW) at the side of the vertical profile (8) facing the outside, opening to the outside from the side of the door (3), enabling the air entering inside the frame (7) from the frame entrance hole (9) to be discharged from the door (3) (Figure 3 and Figure 4).
[0028] The air that enters in between the panels (4 and 5) preferably from the entrance holes (A) at the underside of the door (3), enters inside the frame (7) by means of the frame entrance hole (9) on the vertical profile (8) and flows inside the frame (7) to be discharged from the discharge hole (10) on the vertical profile (8). Thus, the frame (7) is used like an air channel, the air entering between the panels (4 and 5) during the cooking process is provided to be discharged without condensing on the panels (4 and 5) and at the same time the air entering inside the frame (7) lowers the temperature of the frame (7) thereby preventing the frame (7) from acting like a heat source. Moreover, the air that enters between the panels (4 and 5) is received inside the frame (7) from more than one point, allowing the air to be in contact with a greater area on the panels (4 and 5) and thus the distribution of heat on the panels (4 and 5) to be more homogeneous. In addition to this, the amount of heat transfer increases since the amount of air circulating between the panels (4 and 5) is increased and the temperature on the panels (4 and 5) can be effectively lowered to values determined by the standards in a shorter period of time.
[0029] Some portion of the air passing through the entrance holes (A) at the underside of the door (3) between the panels (4 and 5), passes inside the frame (7) from the frame entrance holes (9) on the vertical profiles (8). The air that flows inside the frame (7) goes out from the discharge holes (10) that enables communication of the frame (7) with the outside and is discharged from the door (3).
[0030] In another embodiment of the present invention, two frame entrance holes (9) are provided on the inner wall (IW) of the vertical profile (8), one being close to the lower edge of the door (3) and the other to the upper edge of the door (3), whereas one discharge hole (10) is disposed on the outer wall (OW) of the vertical profile (8) to be close to the upper edge of the door (3). In this embodiment, the air that enters between the panels (4 and 5), enters inside the frame (7) from both of the frame entrance holes (9) on each vertical profile (8) and moves along virtually the entire length of the profile (8) to be discharged out of the frame (7) from the discharge hole (10). The air is discharged after moving along the entire length of the profile (8) through the profile (8) by using two frame entrance holes (9) and a discharge hole (10). Thus, it is provided that the panel (4 and 5) surfaces be heated homogenously by the distribution of the air, passing in between the panels (4 and 5), between the panels (4 and 5), that the temperature of the panels (4 and 5) is lowered by the increase of the heat transfer and that the profiles (8 and 11), which act as heat sources, be cooled effectively.
[0031] In another embodiment of the present invention, the oven (1) comprises an intermediate panel (6) disposed between the inner panel (5) and the outer panel (4). In this embodiment, some of the frame entrance holes (9) remain between the inner panel (5) and the intermediate panel (6) and some remain between the outer panel (4) and the intermediate panel (6). In this embodiment, the air between the inner panel (5) and the intermediate panel (6) enters into the vertical profile (8) from the frame entrance hole (9) on the inner wall (IW) of the vertical profile (8) and the air between the outer panel (4) and the intermediate panel (6) enters from the other frame entrance hole (9) on the inner wall (IW) of the vertical profile (8) and is discharged out from the discharge hole (10) on the outer wall (OW) of the vertical profile (8) (Figure 5, Figure 6 and Figure 8).
[0032] In another embodiment of the present invention, the discharge hole (10) is disposed on the outer wall (OW) on the side of the horizontal profile (11) facing outside. The discharge hole (10) opens to the outside from above the door (3) thereby enables the air entering inside the frame (7) through the frame entrance hole (9) to be discharged from the door (3).
[0033] By means of the present invention, the frame (7) is used like an air channel and the air that enters between the panels (4 and 5) can be discharged without condensing on the panels (4 and 5), and at the same time the frame (7) is prevented from acting like a heat source since air enters inside the frame (7). Moreover, the heat distribution on the panels (4 and 5) is maintained to be more homogeneous by discharging the air passing between the panels (4 and 5) from more than one point. Additionally, the amount of heat transfer increases since the amount of air circulating between the panels (4 and 5) is increased and the temperature on the panels (4 and 5) can be effectively lowered to values determined by the standards in a shorter period of time.
[0034] It is to be understood that the present invention is not limited to the embodiments disclosed above and an expert in the technique can easily introduce different embodiments. These should be considered within the scope of the protection postulated by the claims of the present invention.