Oven cooking device

Abstract

To make an exhaust gas discharged from a calcination furnace of an oven cooking device disposed on an upper side less likely to be subjected to an influence from an exhaust gas discharged from a calcination furnace of an oven cooking device disposed on a lower side even when oven cooking devices are used while being stacked vertically in a multistage manner.SOLUTION: An oven cooking device 10 includes: a calcination furnace 20 disposed in a casing 11 to bake an object to be cooked; heaters 41, 42 for heating the inside of the calcination furnace 20; an exhaust port 20b formed in an upper part of a rear face of the calcination furnace 20; and an exhaust passage 31 connected to the exhaust port 20b. An exhaust opening part 11a is formed in an upper part of a rear wall of the casing 11. The exhaust passage 31 is connected to the exhaust opening part 11a.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to an oven cooking apparatus for baking foods to be cooked such as bread dough.

Background Art

[0002] Patent Document 1 discloses a deck oven (oven cooking apparatus) for baking bread dough. This deck oven includes a three-stage furnace unit within a main body frame, and horizontal exhaust passages (hereinafter referred to as horizontal exhaust passages) are formed on the inner sidewalls of the furnaces of each furnace unit. The horizontal exhaust passages of each furnace unit are connected to vertical exhaust passages (hereinafter referred to as vertical exhaust passages) within an exhaust duct erected on the side of the furnace. Between the horizontal exhaust passage on the inner sidewall of the furnace and the vertical exhaust passage of the exhaust duct, a deflector plate is provided for deflecting the exhaust sent from the horizontal exhaust passage on the inner sidewall of the furnace upward above the vertical exhaust passage within the exhaust duct. The exhaust within each furnace is sent upward within the vertical exhaust passage of the exhaust duct by the deflector plate.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the deck oven of Patent Document 1 described above, the exhaust gas from each furnace of the furnace units provided in multiple stages vertically is sent to the vertical exhaust passage of the exhaust duct through the horizontal exhaust passage on the inner side wall of the furnace. Further, since a baffle plate is provided between the horizontal exhaust passage on the inner side wall of the furnace and the vertical exhaust passage of the exhaust duct, the exhaust gas sent from the furnace unit to the vertical exhaust passage of the exhaust duct flows upward. However, when the exhaust gas discharged from the furnace unit arranged on the upper side flows into the vertical exhaust passage of the exhaust duct, it is affected by the flow of the exhaust gas discharged from the furnace unit arranged on the lower side and rising in the vertical exhaust passage of the exhaust duct. Therefore, there is a problem that it is difficult to discharge the exhaust gas from the furnace unit arranged on the upper side. An object of the present invention is to make it difficult for the exhaust gas discharged from the firing furnace of the oven cooking apparatus arranged on the upper side to be affected by the exhaust gas discharged from the firing furnace of the oven cooking apparatus arranged on the lower side even when the oven cooking apparatuses are stacked vertically in multiple stages.

Means for Solving the Problems

[0005] In order to solve the above problems, the present invention provides a baking furnace disposed in a casing for baking an object to be cooked, a heater for heating the inside of the baking furnace, an exhaust port formed in the upper part of the rear surface of the baking furnace, An oven cooking apparatus includes an exhaust opening formed at an upper portion of a rear wall of a casing, and an exhaust passage connecting an exhaust port and the exhaust opening. The exhaust passage includes an exhaust pipe extending upward from the exhaust port, and an exhaust guide that guides exhaust sent through the exhaust pipe toward the exhaust opening above an upper end opening of the exhaust pipe. An exhaust shutter is provided at an upper end portion or above the exhaust pipe to open and close the exhaust pipe by moving back and forth, and an operation bar for moving the exhaust shutter back and forth is provided above the firing furnace so as to be movable back and forth. and provides an oven cooking apparatus characterized by the above.

[0006] In the oven cooking apparatus configured as described above, An exhaust port formed at an upper portion of a rear surface of a firing furnace, an exhaust opening formed at an upper portion of a rear wall of a casing, and an exhaust passage connecting the exhaust port and the exhaust opening. since the exhaust gas discharged from the baking furnace is discharged to the rear side of the casing, even when the oven cooking apparatuses are stacked vertically in multiple stages, the oven cooking apparatus arranged on the upper side can be made less affected by the exhaust gas of the oven cooking apparatus arranged on the lower side. Further, the exhaust passage includes an exhaust pipe extending upward from the exhaust port and an exhaust guide provided above the upper end opening of the exhaust pipe. Since an exhaust passage extending toward the exhaust opening is formed in the exhaust guide, the exhaust discharged from the exhaust port of the firing furnace is discharged from the upper end opening through the exhaust pipe, and the exhaust discharged from the upper end opening is discharged from the exhaust opening of the casing through the exhaust passage without spreading around by the exhaust guide. Furthermore, an exhaust shutter is provided at an upper end portion or above the exhaust pipe to open and close the exhaust pipe by moving back and forth, and an operation bar for moving the exhaust shutter back and forth is provided above the firing furnace so as to be movable back and forth. Thus, the exhaust pipe can be opened and closed with a simple structure.

Brief Description of the Drawings

[0009]

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Best Mode for Carrying Out the Invention

[0010] Hereinafter, an embodiment of the oven cooking apparatus of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the oven cooking apparatus 10 of the present invention heats and bakes bread dough or confectionery dough (object to be cooked) in a natural convection baking furnace 20, and by opening the door 21 provided at the front part of the baking furnace 20, the object to be baked can be carried in and out of the baking furnace 20 through the front opening 20a. The oven cooking apparatus 10 is installed above equipment such as a table, a counter, or a dough conditioner in a store, a workshop, etc., and can be installed in multiple stages vertically as required.

[0011] As shown in FIGS. 1 to 3, the oven cooking apparatus 10 includes a casing 11 having a substantially rectangular parallelepiped shape. A machine room 12 is provided on the right side in the casing 11, and the baking furnace 20 is disposed in the remaining part in the casing 11. The casing 11 includes a base plate 13 corresponding to the bottom wall, a frame body 14 provided so as to partition the upper side of the base plate 13 into a substantially rectangular parallelepiped shape, and a panel 15 covering the front, rear, left, right, and upper surfaces partitioned and formed by the frame body 14.

[0012] As shown in FIG. 4, leg portions 13a are provided at the four edges of the base plate 13, which are composed of the front, rear, left, and right sides, and the lower ends bent downward are further bent inward. The leg portions 13a keep the lower surface of the base plate 13 away from the installation surface. A reinforcing member 13b extending in the front-rear direction is provided at the central portion in the left-right direction on the lower surface of the base plate 13. The reinforcing member 13b uses a sheet metal member whose cross-sectional shape in a direction orthogonal to the longitudinal direction is bent in an L shape, and has a function of preventing the central portion of the base plate 13 in the left-right direction from sinking downward.

[0013] At the four corners of the legs 13a of the base plate 13, there are provided right-angled triangular corner plates 13c, and the corner plates 13c have the function of separating the legs 13a from the setting surface. In this way, the central part of the base plate 13 in the left-right direction is prevented from sinking downward by the reinforcing member 13b, and in addition to making it difficult for the heat of the firing furnace 20 to be transmitted to the installation surface through the base plate 13, the contact area of the legs 13a of the base plate 13 with the installation surface is reduced by the four corner corner plates 13c, so the heat in the firing furnace 20 is difficult to be transmitted to the installation surface through the legs 13a of the base plate 13.

[0014] As shown in FIG. 3, the frame body 14 includes front and rear frame members 14a and 14b provided before and after the base plate 13, and beam members 14c connecting the left and right sides of the front and rear frame members 14a and 14b. Each of the front and rear frame members 14a and 14b has a column portion standing on both the left and right sides of the base plate 13, and a U-shaped cross-section with the lower side open where the upper parts of the left and right column portions are connected by a girder portion. The beam members 14c on both the left and right sides are fixed to the upper ends of the column portions of the front and rear frame members 14a and 14b, and connect the left and right sides of the front and rear frame members 14a and 14b.

[0015] As shown in FIGS. 5 and 6, a front panel 15a is provided on the front side of the firing furnace 20 in the casing 11, and a rear panel 15d is provided on the rear side of the rear frame member 14b. A left panel 15e is provided on the left side between the front frame member 14a and the rear frame member 14b, and a right panel 15f is provided on the right side between the front frame member 14a and the rear frame member 14b. An upper panel 15g is provided on the upper sides of the front and rear frame members 14a and 14b and the left and right beam members 14c.

[0016] As shown in Fig. 5, the front panel 15a includes a lower front panel 15b that covers only the lower part of the front of the firing furnace 20, and a main front panel 15c that covers the upper part above the lower part of the front of the firing furnace 20. The lower front panel 15b covers the lower part where the lower heater 41 of the front opening 20a of the firing furnace 20 is disposed so that the object to be cooked can be carried in and out of the front opening 20a of the firing furnace 20. A pair of left and right brackets 16 for supporting the door 21 are fixed to the lower front panel 15b. The main front panel 15c has a substantially U-shape with the lower side open in a front view so that the object to be cooked can be carried in and out of the front opening 20a of the firing furnace 20, and covers the upper part of the front opening 20a of the firing furnace 20 where the upper heater 42 and the steam generation unit 50 are disposed.

[0017] As described above, the front panel 15a is detachably provided with a lower front panel 15b to which the bracket 16 for supporting the door 21 is fixed, and a main front panel 15c that covers the upper heater 42 and the steam generation unit 50 disposed in the upper part of the firing furnace 20. When performing maintenance and inspection on the upper heater 42 and the steam generation unit 50 in the upper part of the firing furnace 20, the main front panel 15c can be removed without removing the lower front panel 15b with the bracket 16 and the door 21 removed from the lower front panel 15b or with the bracket 16 and the door 21 attached to the lower front panel 15b. Therefore, maintenance and inspection of the upper heater 42 and the steam generation unit 50 disposed in the upper part of the firing furnace 20 can be performed without making it an essential requirement to remove the bracket 16 and the door 21.

[0018] As shown in FIG. 6, the upper surface panel 15g has a shallow box shape that is open at the bottom, including a top plate portion 15h and a peripheral wall portion 15i that hangs down the peripheral edge of the top plate portion 15h. The upper surface panel 15g is fitted on the upper sides of the front and rear frame members 14a and 14b and the left and right beam members 14c. A heat insulating material 15j made of a silicon material is attached to the lower surface peripheral edge of the top plate portion 15h of the upper surface panel 15g, and the heat insulating material 15j makes it difficult for heat to be transmitted from the firing furnace 20 to the upper surface panel 15g through the front and rear frame members 14a and 14b and the left and right beam members 14c. Although the heat insulating material 15j is attached to the lower surface peripheral edge of the top plate portion 15h of the upper surface panel 15g, it is not limited to this, and it may be attached to the upper surfaces of the front and rear frame members 14a and 14b and the left and right beam members 14c.

[0019] As shown in FIG. 6, an exhaust opening 11a is formed on the left side of the upper edge of the rear wall of the casing 11. In this embodiment, a notch 15i1 is formed on the left side of the peripheral wall portion 15i on the rear side of the upper surface panel 15g, and an opening 14b1 is formed on the left side of the girder portion of the rear frame member 14b, and the exhaust opening 11a is formed by the notch 15i1 and the opening 14b1. The exhaust opening 11a is connected to an exhaust passage 31 (particularly, a passage formed by the internal space of the exhaust guide 33) that discharges the air inside the firing furnace 20 described later.

[0020] As shown in FIG. 3, in the machine room 12 inside the casing 11, an electric control box 17 for storing electrical components (control components) that control the lower and upper heaters 41 and 42, the water supply valve 55 of the steam generation unit 50, etc., which will be described later, is provided. The electric control box 17 has a substantially rectangular parallelepiped shape with electrical components stored inside, and leg portions 17a are provided at the front and rear of the lower part of the electric control box 17. The leg portions 17a keep the lower surface of the electric control box 17 separated from the upper surface of the base plate 13, making it difficult for the heat transmitted from the firing furnace 20 to the base plate 13 to be transmitted to the inside of the electric control box 17. As a result, the electrical components inside the electric control box 17 are less likely to be affected by the heat transmitted from the firing furnace 20 to the base plate 13.

[0021] As shown in FIGS. 2 and 7, the baking furnace 20 bakes objects to be cooked such as bread dough and confectionery dough, and has a substantially rectangular parallelepiped shape with a front opening 20a for loading and unloading the objects to be cooked formed on the front surface. As shown in FIGS. 3 and 7, a heat insulating material 22 made of glass wool is provided on the outer peripheral surface of the baking furnace 20, and an outer plate 23 made of a stainless steel sheet metal member is further provided on the outer peripheral surface of the heat insulating material 22. The heat inside the baking furnace 20 is less likely to be transmitted to the surroundings including the casing 11 and the machine room 12 by the heat insulating material 22. As shown in FIGS. 3 and 6, a groove portion 22a extending in the front-rear direction is formed on the left side portion of the upper surface of the heat insulating material 22 covering the upper side of the baking furnace 20, and various components of the exhaust mechanism 30 of the baking furnace 20 described later are disposed in this groove portion 22a.

[0022] On the right side surface of the baking furnace 20 on the side of the machine room 12, illumination windows (not shown) are provided at substantially the central portions in the vertical and front-rear directions, and a recess (not shown) is formed in the heat insulating material 22 covering the right outer peripheral surface on the side of the machine room 12 of the baking furnace 20 at a position facing the illumination windows. As shown in FIGS. 3, 7, and 8, an in-furnace lamp 24 using LED illumination for illuminating the inside of the baking furnace 20 is attached to the recess of the heat insulating material 22 using a bracket 25. As shown in FIG. 8, the bracket 25 is composed of a base plate portion 25a disposed on the lower surface of the recess and a substantially U-shaped cover portion 25b with an open lower side that covers the upper side of the in-furnace lamp 24 above the base plate portion 25a, and the in-furnace lamp 24 is attached above the base plate portion 25a. The base plate portion 25a and the cover portion 25b of the bracket 25 are made of a shiny stainless steel material (SUS304 2B material), and the light of the in-furnace lamp 24 is not only directly irradiated into the baking furnace 20 from the illumination window, but also the light diffused and irradiated from the in-furnace lamp 24 is reflected toward the illumination window by the bracket 25 made of a shiny material and irradiated into the baking furnace 20.

[0023] As shown in FIG. 9, an upper heater 42, which will be described later, is attached to the upper part of the right side surface on the mechanical chamber 12 side in the firing furnace 20. A recess 22b is formed at a position where the upper heater 42 is attached to the upper part of the heat insulating material 22 that covers the mechanical chamber 12 side of the firing furnace 20, and a detachable heat insulating material 26 is detachably attached to the recess 22b of the heat insulating material 22. The detachable heat insulating material 26 is removed from the recess 22b of the heat insulating material 22 when maintaining each of the heater elements 42a to 42d of the upper heater 42 in order to facilitate the maintenance of each of the heater elements 42a to 42d of the upper heater 42. As shown in FIG. 10(a), the detachable heat insulating material 26 has a substantially rectangular parallelepiped shape elongated in the front-rear direction, and through holes 26a penetrating in the left-right direction are formed at eight positions along the front-rear direction. Both longitudinal ends of the four U-shaped heater elements 42a to 42d of the upper heater 42 attached to the right side surface of the firing furnace 20 are inserted into the respective through holes 26a of the detachable heat insulating material 26, and terminals provided at the longitudinal ends of each of the heater elements 42a to 42d are arranged in the mechanical chamber 12 and connected to a power supply electrical wiring (not shown).

[0024] The outer plate 23 that covers the outside of the heat insulating material 22 is provided with a detachable outer plate 23a at a position that covers the detachable heat insulating material 26. When performing maintenance on the upper heater 42, after removing the detachable outer plate 23a, by removing the detachable heat insulating material 26 together with the heater elements 42a to 42d, each heater element 42a to 42d of the upper heater 42 can be removed without removing the heat insulating material 22 from the right outer peripheral surface of the firing furnace 20. Further, as shown in FIG. 10(b), when a notch 26b is formed above the through hole 26a through which both longitudinal ends of the U-shaped heater elements 42a to 42d are inserted, both longitudinal ends of the heater elements 42a to 42d or the electrical wiring connected to the terminals of the heater elements 42a to 42d are passed through the notch 26b, and the heater elements 42a to 42d can be easily removed from the detachable heat insulating material 26. In addition, a detachable heat insulating material (not shown) and a detachable outer plate (not shown) for maintaining each heater element 41a to 41c of the lower heater 41 are also provided at the lower part of the right side surface on the machine room 12 side of the firing furnace 20. Since they have substantially the same configuration as the detachable heat insulating material 26 and the detachable outer plate 23a described above, detailed description thereof is omitted.

[0025] As shown in FIGS. 1 and 2, a door 21 is provided on the front side of the firing furnace 20 so as to be openable and closable. The door 21 is rotatably supported about a horizontal axis by a bracket 16 provided at the lower part of the front panel 15a. As shown in FIGS. 2, 5, and 7, a ceramic furnace floor plate 27 is provided at the lower part of the firing furnace 20. A tray containing the object to be cooked can be placed above the furnace floor plate 27 in the firing furnace 20. Left and right guides 28 extending along the front-rear direction are provided at both left and right edge portions of the furnace floor plate 27, and a guide 29 extending along the left-right direction is provided at the rear edge portion of the furnace floor plate 27. A tray containing the object to be cooked is prevented from being unevenly accommodated in the left-right direction in the firing furnace 20 by the left and right guides 28 and from being unevenly accommodated at the rear side by the rear guide 29. Taper portions 28a that expand the interval toward the front opening 20a side are provided at the front portions of the left and right guides 28. The taper portions 28a facilitate inserting the tray containing the object to be cooked between the left and right guides 28.

[0026] As shown in FIGS. 7 and 11, an exhaust port 20b is formed on the left side of the upper part of the rear surface of the firing furnace 20, and the air in the firing furnace 20 can be discharged outside the casing 11 by an exhaust mechanism 30 from the exhaust port 20b. The exhaust mechanism 30 includes an exhaust passage 31 connected to the exhaust port 20b and an opening / closing mechanism 34 for opening and closing the exhaust passage 31. The exhaust passage 31 includes an exhaust pipe 32 connected to the exhaust port 20b and an exhaust guide 33 for guiding the exhaust sent through the exhaust pipe 32 at the upper side of the exhaust pipe 32 to the exhaust opening 11a of the casing 11.

[0027] As shown in FIG. 11, the exhaust pipe 32 uses an L-shaped pipe member whose rear end extending rearward from the exhaust port 20b of the firing furnace 20 extends upward, and the upper end portion of the exhaust pipe 32 protrudes above the upper surface of the bottom wall of the groove portion 22a on the left side of the upper surface of the heat insulating material 22. The exhaust guide 33 forms an air passage from the upper end opening of the exhaust pipe 32 to the exhaust opening 11a of the casing 11 by covering the periphery of the upper end opening of the exhaust pipe 32 up to the exhaust opening 11a of the casing 11 on the upper surface of the groove portion 22a of the heat insulating material 22.

[0028] As shown in FIGS. 6, 11, and 12, the exhaust guide 33 includes a lower box body 33a that is open at the upper and rear sides, and an upper lid body 33b that covers the upper side of the lower box body 33a and is open at the lower and rear sides. A space formed by covering the upper side of the lower box body 33a with the upper lid body 33b forms an air passage from the upper end opening of the exhaust pipe 32 to the exhaust opening 11a of the casing 11. A through hole 33a1 is formed in the rear part of the bottom wall of the lower box body 33a, and the upper end portion of the exhaust pipe 32 is disposed in the exhaust guide 33 from this through hole 33a1. The upper end opening of the exhaust pipe 32 is spaced from the lower surface of the upper wall of the upper lid body 33b, and the upper end opening of the exhaust pipe 32 is open to the internal space of the exhaust guide 33 formed by the lower box body 33a and the upper lid body 33b. Further, the internal space of the exhaust guide 33 formed by the lower box body 33a and the upper lid body 33b is open to the outside by the exhaust opening 11a of the casing 11. The air in the firing furnace 20 is discharged from the exhaust port 20b through the exhaust pipe 32 into the internal space of the exhaust guide 33, and the air discharged into the internal space of the exhaust guide 33 is discharged from the exhaust opening 11a toward the rear side of the casing 11.

[0029] As shown in FIGS. 11 and 12, an opening / closing mechanism 34 for opening and closing the exhaust passage 31 is provided above the firing furnace 20 at the upper part inside the casing 11. The opening / closing mechanism 34 includes an exhaust shutter 35 provided above the upper end opening of the exhaust pipe 32 so as to be movable back and forth, an operation bar 36 provided in the groove portion 22a of the heat insulating material 22 for moving the exhaust shutter 35 back and forth, and an operation knob 37 provided at the front end portion of the operation bar 36 on the front side of the casing 11. The exhaust shutter 35 is plate-shaped and covers the upper end opening of the exhaust pipe 32 so that the opening degree can be adjusted. When the exhaust shutter 35 is disposed at the positions shown in FIGS. 11 and 12, the upper end opening of the exhaust pipe 32 is in a completely closed state. When the exhaust shutter 35 is moved little by little to the front side (the left side in FIG. 11, the front side of the paper surface in FIG. 12) from this position, the upper end opening of the exhaust pipe 32 is opened little by little.

[0030] As shown in FIGS. 11 and 12, the operation bar 36 moves the exhaust shutter 35 back and forth, and is provided so as to be movable back and forth within the groove portion 22a of the heat insulating material 22. The rear end portion of the operation bar 36 is inserted into a through hole formed in the front wall of the lower casing 33a of the exhaust guide 33, and the rear end of the operation bar 36 is fixed to the exhaust shutter 35. The front end portion of the operation bar 36 is inserted into a through hole formed in the beam portion of the front side frame member 14a and a through hole formed in the peripheral wall portion 15i on the front side of the upper surface panel 15g. An operation knob 37 is attached to the front end of the operation bar 36 on the front side of the casing 11. When the operation knob 37 is grasped and the operation bar 36 is moved forward, the exhaust shutter 35 moves forward and the upper end opening of the exhaust pipe 32 is opened. From this state, when the operation knob 37 is grasped and the operation bar 36 is moved backward, the exhaust shutter 35 moves backward and the upper end opening of the exhaust pipe 32 is closed.

[0031] As shown in FIGS. 9, 11, and 13, a heater 40 is provided in the firing furnace 20. In this embodiment, a lower heater 41 is provided below the furnace floor plate 27 at the lower part of the firing furnace 20 (shown in FIGS. 11 and 13), and an upper heater 42 is provided in the upper part of the firing furnace 20 (shown in FIGS. 9 and 11). The lower and upper heaters 41 and 42 use heater elements made of substantially U-shaped sheathed heaters with open right sides. The lower heater 41 is arranged with three heater elements arranged side by side in the front-rear direction, and the upper heater 42 is arranged with four heater elements arranged side by side in the front-rear direction. In order to easily impart a firing color to the upper surface of the object to be fired, and since the furnace floor plate 27 with high heat storage property is arranged above the lower heater 41, the upper heater 42 has a larger number of heater elements than the lower heater 41.

[0032] At the front of the firing furnace 20, a front opening 20a is provided, and this front opening 20a is closable by a door 21 in an openable and closable manner. When the door 21 is opened, the heat inside the firing furnace 20 is released to the outside from the front opening 20a, and the temperature at the front part of the firing furnace 20 is likely to decrease. For this reason, the heater element 41a arranged at the foremost side of the lower heater 41 has a maximum output value that can be output larger than that of the heater element 41b arranged at the middle part in the front-rear direction. Similarly, the heater element 42a arranged at the foremost side of the upper heater 42 has a maximum output value that can be output larger than that of the heater elements 42b and 42c arranged at the middle part in the front-rear direction.

[0033] Although a heat insulating material 22 is provided on the rear surface of the rear wall of the firing furnace 20, the temperature at the rear part inside the firing furnace 20 is likely to decrease due to the heat released from the rear wall more than that at the middle part in the front-rear direction. For this reason, the heater element 42d arranged at the rearmost side of the upper heater 42 has a maximum output value that can be output larger than that of the heater elements 42b and 42c arranged at the middle part in the front-rear direction.

[0034] In this embodiment, the maximum output value (maximum power value) that can be output by the heater element 41a arranged at the front side of the lower heater 41 is 515 W, and the maximum output value (maximum power value) that can be output by the heater elements 41b and 41c arranged at the middle part and the rear part in the front-rear direction is 290 W. Also, the maximum output value (maximum power value) that can be output by the heater elements 42a and 42d arranged at the foremost side and the rearmost side of the upper heater 42 is 515 W, and the maximum output value (maximum power value) that can be output by the heater elements 42b and 42c arranged at the middle part in the front-rear direction is 290 W.

[0035] As shown in FIGS. 9 and 13, insulator portions 41a1 to 41c1 and 42a1 to 42d1 made of insulating members are provided at positions close to the right side surface of the firing furnace 20 for each of the heater elements 41a to 41c and 42a to 42d of the lower and upper heaters 41 and 42. The insulator portions 41a1 to 41c1 and 42a1 to 42d1 are color-coded according to the maximum output value (maximum power value) that can be output by the heater elements. Since the insulator portions 41a1 to 41c1 and 42a1 to 42d1 are color-coded according to the maximum output value (maximum power value) that can be output by the heater elements, when removing or replacing each of the heater elements 41a to 41c and 42a to 42d of the lower and upper heaters 41 and 42 for maintenance or the like, it is possible to prevent attaching heater elements with different maximum output values by mistake. A punching plate having a large number of holes formed immediately below the upper heater 42 is disposed, but the holes of the punching plate are not shown in FIG. 9.

[0036] As shown in FIGS. 7 and 13, a lower temperature sensor 43 is provided at the lower part of the right side surface inside the firing furnace 20, and an upper temperature sensor 44 is provided at the upper part of the right side surface inside the firing furnace 20. The lower temperature sensor 43 is disposed between the foremost heater element 41a and the second heater element 41b from the front of the lower heater 41, and is used for controlling the lower heater 41. The upper temperature sensor 44 is disposed at a position between the second heater element 42b from the front and the third heater element 42c from the front below the upper heater 42, and is used for controlling the upper heater 42. A guard member 45 is provided in front of the upper temperature sensor 44 on the upper part of the right side surface of the firing furnace 20, and the guard member 45 prevents a tray or the like carried into the firing furnace 20 from the front opening 20a from colliding with the upper temperature sensor 44.

[0037] As shown in FIGS. 11 and 14, a steam generation section 50 is provided at the upper part inside the firing furnace 20. The steam generation section 50 is disposed above the upper heater 42 inside the firing furnace 20 to generate steam inside the firing furnace 20. The steam generation section 50 includes a steam generation dish 51 disposed above the upper heater 42, a heat storage plate 52 provided at the front part of the upper surface of the steam generation dish 51, a water supply section 53 for supplying water above the steam generation dish 51, and a steam generation lid 56 that covers the upper side of the steam generation dish 51 so as to form a steam generation space.

[0038] The steam generation dish 51 has a shallow dish shape in which the front, rear, left, and right edges of a rectangular sheet metal member are slightly raised upward to store a small amount of water. Locking arms 51a that protrude outward at the front and rear are provided on both left and right sides of the steam generation dish 51. The locking arms 51a are locked to support brackets 20c that extend in the front-rear direction provided on the upper parts of the left and right inner side surfaces of the firing furnace 20. With the steam generation dish 51 locked to the support brackets 20c inside the firing furnace 20 by the locking arms 51a, a steam passage 51b is formed between the steam generation dish 51 and the inner side surfaces (front, rear, left, and right side surfaces) of the firing furnace 20. The steam passage 51b sends the steam generated above the steam generation dish 51 at the upper part inside the firing furnace 20 to the lower part of the firing furnace 20. A drain pipe 51c is connected to the rear part of the steam generation dish 51, and the leading end of the drain pipe 51c extends to the rear side of the casing 11.

[0039] A strip-shaped heat storage plate 52 that extends in the left-right direction is provided at the front part of the upper surface of the steam generation dish 51. The heat storage plate 52 can store heat for generating steam at the front part of the steam generation dish 51. The water supply section 53 supplies water above the steam generation dish 51 and includes a water supply pipe 54 led out from a water supply source and a water supply valve 55 interposed in the water supply pipe 54. The water supply pipe 54 extends from the outside of the casing 11 through the machine room 12 into the firing furnace 20, and the water supply port of the water supply pipe 54 is led out above the heat storage plate 52 at the front part of the steam generation dish 51. The water supply valve 55 is interposed in the water supply pipe 54 inside the machine room 12, and the water from the water supply source is sent above the heat storage plate 52 through the water supply pipe 54 when the water supply valve 55 is opened.

[0040] Above the steam generation dish 51, a steam generation lid 56 is provided to cover it so as to form a steam generation space for generating steam. A number of steam passage holes 56a for allowing steam to pass upward are formed in the steam generation lid 56 from the front to the whole of the rear. The steam generation lid 56 suppresses the upward flow by covering the steam generated in the steam generation space above the steam generation dish 51 with portions other than the portions where the steam passage holes 56a are formed, and causes the steam mainly generated at the front of the steam generation space to spread to the rear. In this embodiment, the steam generation lid 56 has a size to cover the upper side of the steam generation dish 51, and a stainless steel punching plate with a number of steam passage holes 56a formed from the front to the whole of the rear is used.

[0041] The steam mainly generated by the heat storage plate 52 at the front of the steam generation dish 51 has its upward flow suppressed by the portions other than the steam passage holes 56a of the steam generation lid 56, and the steam with the suppressed upward flow is discharged from a number of steam passage holes 56a to the upper side of the steam generation lid 56 in the process of flowing from the front to the rear. The steam discharged to the upper side of the steam generation lid 56 hits the ceiling surface of the firing furnace 20 and then flows down to the lower part of the firing furnace 20 through the passage 51b between the steam generation dish 51 and the inner surface of the firing furnace 20. In this way, the steam generated in the steam generation section 50 also flows down to the whole including the rear while mainly flowing through the front of the firing furnace 20.

[0042] As shown in Fig. 15, an operation panel 60 is provided on the right side of the front surface of the casing 11. The operation panel 60 includes a display unit 61, an operation unit 62, and a buzzer (not shown). In this embodiment, the display unit 61 uses a liquid crystal panel (LCD panel), and can display various settings such as the operation process of the oven cooking device 10 and the detected temperature in the firing furnace 20. In this embodiment, the operation unit 62 uses six operation buttons 62a to 62f and one jog dial 62g, and can input various settings such as temperature setting for the operation process of heating the firing furnace 20, output settings for the lower and upper heaters 41 and 42, and cooking time setting, and operation contents such as steam supply operation. The buzzer can notify the end of the operation process of heating the firing furnace 20, the end of the cooking time, and error information by outputting sounds such as buzzer sounds.

[0043] As shown in Fig. 16, the oven cooking device 10 includes a control device 70. The control device 70 is connected to a lower heater 41 (heater elements 41a to 41c), an upper heater 42 (heater elements 42a to 42d), a lower temperature sensor 43, an upper temperature sensor 44, a water supply valve 55, and an operation panel 60. The control device 70 has a microcomputer (not shown), and the microcomputer includes a CPU, a RAM, a ROM, and a timer (all not shown) connected via a bus.

[0044] The control device 70 includes, in the ROM, an operation process for controlling the operation of the lower and upper heaters 41 and 42 so that the temperature in the firing furnace 20 becomes the set temperature. When this operation process is executed, the set outputs of the lower and upper heaters 41 and 42 can be changed in five steps from 20% to 100%. The operation process includes a manual operation for setting the temperature in the firing furnace 20 and the outputs of the lower and upper heaters 41 and 42, and a program operation in which the temperature in the firing furnace 20 and the outputs of the lower and upper heaters 41 and 42 are preset, and the manual operation and the program operation can be selected.

[0045] Further, when the control device 70 is executing the operation process, it has a time measurement process for measuring, by means of a timer, the end of the set cooking time for baking the object to be cooked. When the control device 70 executes the time measurement process and the set cooking time for baking the object to be cooked ends, it causes the display unit 61 and the buzzer to output information indicating that the set cooking time has ended.

[0046] Further, when the control device 70 is executing the operation process, it enables the execution of a steam generation process for generating steam by the steam generation unit 50 in the baking furnace 20. When the control device 70 executes the steam generation process, it opens the water supply valve 55 for a preset set time (1 second to 5 seconds), supplies water from the water supply pipe 54 to the upper side of the heat storage plate 52 of the steam generation dish 51, brings the water into contact with the heat storage plate 52 and the upper surface of the steam generation dish 51 to evaporate the water and generate steam. The steam generated on the upper side of the steam generation dish 51 is discharged to the upper side of the steam generation lid 56 through the steam passage hole 56a, and the steam discharged to the upper side of the steam generation lid 56 flows down to the lower part of the baking furnace 20 through the passage 51b between the steam generation dish 51 and the inner surface of the baking furnace 20. Thus, by executing the steam generation process, it is possible to temporarily apply steam to the object to be cooked being baked in the baking furnace 20. Note that the set time (water supply time) for opening the water supply valve 55 can be set to a time between 1 second and 5 seconds.

[0047] Next, the baking process of the food to be cooked in the baking furnace 20 will be described. When an operation signal of an operation process consisting of manual operation or program operation is input by operating the operation unit 62 of the operation panel 60, the control device 70 controls the energization (operation) of the lower heater 41 based on the detected temperature of the lower temperature sensor 43, and controls the energization (operation) of the upper heater 42 based on the detected temperature of the upper temperature sensor 44, so that the inside of the baking furnace 20 is heated and controlled to the set temperature. The lower part inside the baking furnace 20 is heated by the heat generation of each heater element 41a - 41c of the energization - controlled lower heater 41, and is also heated by the radiant heat generated from the upper furnace floor plate 27 heated by each heater element 41a - 41c of the lower heater 41. In addition, the upper part inside the baking furnace 20 is heated by the heat generation of each heater element 42a - 42d of the energization - controlled upper heater 42, and is also heated by the heat rising by natural convection from the lower part inside the baking furnace 20.

[0048] Open the door 21, carry in a tray containing the food to be cooked such as bread dough into the baking furnace 20 through the front opening 20a, close the front opening 20a with the door 21, and then, when an operation signal for starting the timing of the set cooking time is input by operating the operation unit 62 of the operation panel 60, the control device 70 starts the timing process until the set cooking time ends. The food to be cooked placed in the tray is heated in the baking furnace 20 by the lower and upper heaters 41 and 42 whose energization is controlled by the above - described operation process.

[0049] Also, when an operation signal for executing a steam generation process for generating steam in the firing furnace 20 by operating the operation unit 62 is input while the operation process is being executed, the control device 70 opens the water supply valve 55 for a set time. The water supplied from the water supply source is sent from the water supply pipe 54 to the upper side of the heat storage plate 52 of the steam generation dish 51, and most of the sent water vaporizes into steam when it comes into contact with the heat storage plate 52, and a part of the water flows from the heat storage plate 52 to the steam generation dish 51 and vaporizes into steam. The steam generated mainly at the front heat storage plate 52 of the steam generation dish 51 is suppressed from flowing upward by the portion other than the steam passage hole 56a of the steam generation lid 56, and the steam whose upward flow is suppressed is discharged upward from a large number of steam passage holes 56a in the process of flowing from the front to the rear, and also flows down to the entire lower part including the rear part mainly at the front part of the firing furnace 20 through the passage 51b between the inner peripheral surface of the firing furnace 20. The object to be cooked in the firing furnace 20 is temporarily imparted with steam by the steam flowing down from the upper part in the firing furnace 20.

[0050] Also, when discharging the air in the firing furnace 20 while the operation process is being executed, the user pinches the operation knob 37 and moves the operation bar 36 forward. The exhaust shutter 35 moves forward by moving the operation bar 36 forward, and the tip opening of the exhaust pipe 32 is opened at an opening degree corresponding to the movement of the exhaust shutter 35. The air (hot air) in the firing furnace 20 is sent from the exhaust port 20b through the exhaust pipe 32 to the internal space of the exhaust guide 33 from the upper end opening, and the air sent to the internal space of the exhaust guide 33 is discharged from the exhaust opening 11a toward the rear side of the casing 11. In this way, the air (hot air) in the firing furnace 20 is discharged from the exhaust opening 11a of the casing 11 toward the rear side by opening the exhaust shutter 35 of the opening and closing mechanism 34.

[0051] When the set cooking time is reached after starting the timekeeping process, the control device 70 outputs information that the firing cooking has ended after the set cooking time has elapsed to the display unit 61 of the operation panel 60 and the buzzer. Information that the firing cooking has ended after the set cooking time has elapsed is displayed on the display unit 61, and information that the firing cooking has ended is emitted from the buzzer, for example, by a buzzer sound.

[0052] The oven cooking device 10 configured as described above includes a baking furnace 20 disposed in a casing 11 for baking an object to be cooked such as bread dough, lower and upper heaters (heaters) 41 and 42 for heating the inside of the baking furnace 20, an exhaust port 20b formed in the upper part of the rear surface of the baking furnace 20, and an exhaust passage 31 connected to the exhaust port 20b. An exhaust opening 11a is formed at the upper edge of the rear wall (upper part of the rear wall) of the casing 11, and the exhaust passage 31 is connected to the exhaust opening 11a. In this embodiment, the exhaust passage 31 includes an exhaust pipe 32 extending upward from the exhaust port 20b and an exhaust guide 33 provided above the upper end opening of the exhaust pipe 32, and the exhaust passage 31 has a crank shape.

[0053] The air (hot air) in the baking furnace 20 is sent from the exhaust port 20b through the exhaust pipe 32 to the internal space of the exhaust guide 33 from the upper end opening, and the air sent to the internal space of the exhaust guide 33 is discharged rearward at the rear side of the casing 11 from the exhaust opening 11a. Even if the oven cooking devices 10 are stacked vertically in multiple stages, the oven cooking device 10 arranged on the upper side can be made less affected by the exhaust of the oven cooking device 10 arranged on the lower side.

[0054] Further, an exhaust shutter 35 for opening and closing the inside of the exhaust pipe 32 by moving back and forth is provided above the upper end opening of the exhaust pipe 32 constituting the exhaust passage 31, and an operation bar 36 for moving the exhaust shutter 35 back and forth is provided above the baking furnace 20 so as to be movable back and forth. By moving the operation bar 36 back and forth, the opening degree is adjusted (opened and closed) by the exhaust shutter 35 by which the exhaust pipe 32 moves back and forth. In this way, the exhaust shutter 35 can be moved back and forth with a simple structure to adjust (open and close) the opening degree of the exhaust pipe 32. Further, since the exhaust shutter 35 and the operation bar 36 are arranged above the baking furnace 20 instead of in the machine room 12 in the casing 11 where the electric component box 17 for housing electric components, the water supply pipe 54, and the water supply valve 55 are arranged, the arrangement of other components in the casing 11 can be prevented from being disturbed.

Description of reference numerals

[0055] 10…Oven cooking device, 11…Casing, 11a…Exhaust opening, 20…Firing furnace, 20b…Exhaust port, 31…Exhaust passage, 32…Exhaust pipe, 33…Exhaust guide, 35…Exhaust valve body, 36…Operation bar.

Claims

【Claim 1】 A baking oven disposed within a casing for baking an object to be cooked, a heater for heating the interior of the baking oven, an exhaust port formed in the upper part of the rear surface of the baking oven, an exhaust opening formed in the upper part of the rear wall of the casing, and an exhaust passage connecting the exhaust port and the exhaust opening, wherein the exhaust passage includes an exhaust pipe extending upward from the exhaust port, and an exhaust guide for guiding the exhaust sent through the exhaust pipe toward the exhaust opening above the upper end opening of the exhaust pipe, and is an oven cooking apparatus, an exhaust shutter for opening and closing the exhaust pipe by moving back and forth is provided at the upper end or above of the exhaust pipe, and an operation bar for moving the exhaust shutter back and forth is provided movably back and forth above the baking oven. An oven cooking apparatus characterized by this.

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