WO2017211382A1

WO2017211382A1 - Oven with a door comprising an air passage

Info

Publication number: WO2017211382A1
Application number: PCT/EP2016/062795
Authority: WO
Inventors: Yagiz TEZEL; Hakan Ozkahraman; Ahmet SOZEN; Cagatay Buyuktopcu
Original assignee: Arcelik Anonim Sirketi
Priority date: 2016-06-06
Filing date: 2016-06-06
Publication date: 2017-12-14
Also published as: TR201708255A2

Abstract

The present invention relates to an oven (1) comprising: a main body (2) which comprises a cavity (3) for cooking the food with radiant heat; a door (4) for opening/closing the cavity (3); a control unit which comprises a printed circuit board (5); and a cooling unit (6) for cooling at least the door (4), wherein the cooling unit (6) comprises a first air passage (7) which is disposed into the door (4), wherein the first air passage (7) comprises a first air inlet (8) for admitting the ambient air, and a first air outlet (9) for discharging the ambient air.

Description

[Title established by the ISA under Rule 37.2] OVEN WITH A DOOR COMPRISING AN AIR PASSAGE

The present invention relates to an oven. The present invention more particularly relates to the printed circuit board of the oven.

Ovens are commonly known in the art. An oven generally comprises: a main body which comprises a cavity for cooking the food with radiant heat; a door for opening/closing the cavity; a front panel which is disposed onto the main body above the door; a control unit which comprises a printed circuit board that is disposed into the main body and behind the front panel; and a cooling unit for cooling the main body and the door. The cooling unit generally comprises one or more air passages whereof the first air passage is generally disposed into the door.

WO2016029955(A1) discloses a prior art oven.

A problem with the prior art oven is that the printed circuit board can be easily damaged due to the excessive heat which is generated during the operation of the oven.

An objective of the present invention is to provide an oven that solves the aforementioned problems of the prior art in a cost effective way and which has an improved ventilation.

This objective has been achieved by the oven as defined in claim 1. Further achievements have been attained by the subject-matters respectively defined in the dependent claims.

In the oven of the present invention the printed circuit board is disposed within the first air passage of the cooling unit.

A major advantageous effect of the present invention is that the printed circuit board can be more effectively cooled within the first air passage which admits the fresh ambient air into the door, and thus the risk of overheating can be eliminated or reduced as much as possible. Another major advantageous effect of the present invention is that the need for using high temperature resistant electrical and electronical components in the printed circuit board can be obviated, and thus the overall cost can be reduced. Another major advantageous effect of the present invention is that the lifetime of the electrical and electronical components in the printed circuit board can be prolonged, and thus the incidence of failures can be decreased, and thus the service costs can be reduced.

In alternative embodiments, the printed circuit board is disposed into various different positions in the first air passage of the door. Herein, the closer the printed circuit board is to the first air inlet of the first air passage, the more effectively it can be cooled as the ambient air gets hotter as it flows towards the first air outlet of the first air passage.

In other alternative embodiments, the printed circuit board is disposed within the first air passage with or without a protective cover. In the latter case the cooling of the printed circuit board can be enhanced due to the direct heat-exchange. The protective cover may be permeable to the ambient air.

Additional features and additional advantageous effects of the oven according to the present invention will become more apparent with the detailed description of the embodiments with reference to the accompanying drawings in which:

Figure 1 – is a schematic sectional view of an oven according to an embodiment of the present invention, wherein the dashed arrows show the air flow.

The reference signs appearing on the drawings relate to the following technical features.

Oven
Main body
Cavity
Door
Printed circuit board
Cooling unit
First air passage
First air inlet
First air outlet
Inner glass pane
Outer glass pane
Gap
Second air passage
Second air inlet
Second air outlet
Fan
Front panel
Handle

Air flow

The oven (1) comprises: a main body (2) which comprises a cavity (3) for cooking the food with radiant heat; a heater (not shown) for heating the cavity (3); a door (4) for opening/closing the cavity (3); a control unit (not shown) which comprises a printed circuit board (5); and a cooling unit (6) for cooling at least the door (4), wherein the cooling unit (6) comprises a first air passage (7) which is disposed into the door (4), wherein the first air passage (7) comprises a first air inlet (8) for admitting the ambient air, and a first air outlet (9) for discharging the ambient air (Fig. 1).

In the oven (1) of the present invention, the printed circuit board (5) is disposed within the first air passage (7) of the cooling unit (6) (Fig. 1).

In an embodiment, the printed circuit board (5) is disposed within the first air passage (7) without a protective cover, and thereby in direct heat exchange with the air flow (A) inside the first air passage (7) (Fig. 1). This embodiment is particularly advantageous as the costs for the protective cover can be saved both in terms of labor and material. Moreover, the printed circuit board (5) can be more effectively cooled.

In another embodiment, the printed circuit board (5) is closer to the first air inlet (8) than the first air outlet (9) in the first air passage (7) (Fig. 1). Herein, the first air inlet (8) is colder than the first air outlet (9) during the operation of the oven (1). This embodiment is particularly advantageous as the printed circuit board (5) can be more effectively cooled.

In another embodiment, the printed circuit board (5) is disposed in close proximity to the first air inlet (8) in the first air passage (7) (Fig. 1). This embodiment is particularly advantageous as the printed circuit board (5) can be cooled with the air flow (A) that has just entered the first air passage (7). Thereby, the printed circuit board (5) can be overwhelmingly cooled.

In another embodiment, the first air inlet (8) of the first air passage (7) is disposed into the lower end of the door (4) (Fig. 1). This embodiment is particularly advantageous as the first air inlet (8) can easily admit the rising ambient air into the door (4) during the operation of the oven (1).

In another embodiment, the first air outlet (9) of the first air passage (7) is disposed into the upper end of the door (4) (Fig. 1). This embodiment is particularly advantageous as the upper section of the door (4) can be more effectively cooled. This embodiment is also particularly advantageous as the natural convection in the first air passage (7) can be enhanced.

In another embodiment, the door (4) comprises an inner glass pane (10) and an outer glass pane (11) which encloses a vertically extending gap (12) that defines the first air passage (7) (Fig. 1). In this embodiment, the printed circuit board (5) is disposed within the gap (12) between the inner glass pane (10) and the outer glass pane (11). This embodiment is particularly advantageous as the user can view the cavity (1) through the inner and outer glass panes (10, 11), and thus conduct the cooking more easily. This embodiment is also particularly advantageous the printed circuit board (5) can be securely protected between the inner glass pane (10) and the outer glass pane (11).

In another embodiment, the cooling unit (6) further comprises: a second air passage (13) which is disposed into the main body (2) (Fig. 1). In this embodiment, the second air passage (13) comprises a second air inlet (14) for admitting the ambient air, and a second air outlet (15) for discharging the ambient air. In this embodiment, the first air outlet (9) of the first air passage (7) is fluidly connected to the second air inlet (14) of the second air passage (13) when the door (4) is closed. In this embodiment, the cooling unit (6) further comprises a fan (16) for moving the air inside the first air passage (7) and the second air passage (13). In this embodiment, the fan (16) is disposed into the second air passage (13). This embodiment is particularly advantageous as the interior of the main body (2) can be effectively cooled.

In another embodiment, the fan (16) is disposed into upper rear section of the main body (2) at a position above the cavity (3). This embodiment is particularly advantageous as the hot air inside the main body (2) can be more easily expelled from the main body (2).

In another embodiment, the main body (2) comprises a front panel (17) which is disposed above the door (4) (Fig. 1). In this embodiment, the second air outlet (15) of the second air passage (13) is disposed into the lower section of the front panel (17). This embodiment is particularly advantageous as the hot ambient air in front of the upper front section of the door (4) can be quickly replaced with the colder ambient air due to the air flow (A), and thus the door (4) can be more effectively cooled.

In another embodiment, the door (4) has a handle (18) (Fig. 1).

In other alternative embodiments, the user-interface (not shown) is disposed onto the front panel (17) and/or onto the the front surface of the door (4).

In another embodiment, the control unit has a pyrolytic mode. This embodiment is particularly advantageous as the cavity (3) can be easily cleaned. Alternatively, the oven (1) may be provided without a pyrolytic mode.

A major advantageous effect of the present invention is that the printed circuit board (5) can be more effectively cooled within the first air passage (7) which admits the fresh ambient air into the door (4), and thus the risk of overheating can be eliminated or reduced as much as possible. Another major advantageous effect of the present invention is that the need for using high temperature resistant electrical and electronical components in the printed circuit board (5) can be obviated, and thus the overall cost can be reduced. Another major advantageous effect of the present invention is that the lifetime of the electrical and electronical components in the printed circuit board (5) can be prolonged, and thus the incidence of failures can be decreased, and thus the service costs can be reduced. Other advantageous effects of the present invention can be taken from the above-described embodiments.

Claims

An oven (1) comprising: a main body (2) which comprises a cavity (3) for cooking the food with radiant heat; a door (4) for opening/closing the cavity (3); a control unit which comprises a printed circuit board (5); and a cooling unit (6) for cooling at least the door (4), wherein the cooling unit (6) comprises a first air passage (7) which is disposed into the door (4), wherein the first air passage (7) comprises a first air inlet (8) for admitting the ambient air, and a first air outlet (9) for discharging the ambient air, characterized in that the printed circuit board (5) is disposed within the first air passage (7) of the cooling unit (6).
The oven (1) according to claim 1, characterized in that the printed circuit board (5) is disposed within the first air passage (7) without a protective cover and is in direct heat exchange with the air flow (A) inside the first air passage (7).
The oven (1) according to claim 1 or 2, characterized in that the printed circuit board (5) is closer to the first air inlet (8) than the first air outlet (9) in the first air passage (7).
The oven (1) according to claim 3, characterized in that the printed circuit board (5) is disposed in close proximity to the first air inlet (8) in the first air passage (7).
The oven (1) according to any one of claims 1 to 4, characterized in that the first air inlet (8) of the first air passage (7) is disposed into the lower end of the door (4).
The oven (1) according to any one of claims 1 to 5, characterized in that the first air outlet (9) of the first air passage (7) is disposed into the upper end of the door (4).
The oven (1) according to any one of claims 1 to 6, characterized in that the door (4) comprises an inner glass pane (10) and an outer glass pane (11) which encloses a vertically extending gap (12) that defines the first air passage (7), wherein the printed circuit board (5) is disposed within the gap (12) between the inner glass pane (10) and the outer glass pane (11).
The oven (1) according to any one of claims 1 to 7, characterized in that the cooling unit (6) further comprises: a second air passage (13) which is disposed into the main body (2), wherein the second air passage (13) comprises a second air inlet (14) for admitting the ambient air and a second air outlet (15) for discharging the ambient air, and wherein the first air outlet (9) of the first air passage (7) is fluidly connected to the second air inlet (14) of the second air passage (13) when the door (4) is closed; and a fan (16) for moving the air inside the first air passage (7) and the second air passage (13), wherein the fan (16) is disposed into the second air passage (13).
The oven (1) according to claim 8, characterized in that the fan (16) is disposed into upper rear section of the main body (2) at a position above the cavity (3).
The oven (1) according to claim 8 or 9, characterized in that the main body (2) comprises a front panel (17) which is disposed above the door (4); and the second air outlet (15) of the second air passage (13) is disposed into the lower section of the front panel (17).
The oven (1) according to any one of claims 1 to 9, characterized in that the control unit has a pyrolytic mode.