Oven cooking device

Abstract

To prevent water fed into a drain passage by a drain pipe from a steam generation tray from flowing into a kiln.SOLUTION: An oven cooking device 10 includes: an upper side heater 32 disposed above a kiln 20 for cooking an object to be cooked; and a steam generation part 40 disposed at the upper side of the upper side heater 32 above the kiln 20, and for generating steam inside the kiln 20. The steam generation part 40 includes: a steam generation tray 41 heated by the upper side heater 32 at the upper side of the upper side heater 32; a water supply part 43 for supplying water to an upper surface of the steam generation tray 41; and a drain pipe 46 provided so as to protrude to the outside at a peripheral edge part of the steam generation tray 41 and for draining water remaining on the steam generation tray 41. A tip part of the drain pipe 46 is inserted in a drain passage 24 from a drain water introduction port 24a disposed at an upper part of one side wall part of the kiln 20 via a gap, and on an outer peripheral surface of the tip part of the drain pipe 46, an annular groove part 46a is formed further on a base end side than a tip opening.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] 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. A bottom heater is disposed at the lower part inside the furnace (baking furnace) of each furnace unit, and a furnace floor is provided above the bottom heater so that a tray or the like on which an object to be cooked is placed can be placed. Further, an upper heater is disposed at the upper part inside the furnace, and a steam generation tank is disposed above the upper heater.

[0002] The steam generation tank is heated by the upper heater disposed on the lower side to generate steam, and includes a rectangular thin dish-shaped steam generation frame and a steam generation tank lid that covers the upper side of the steam generation tank frame so that a steam generation space is defined inside. At the bottom surface portion of the steam generation tank frame, a heat storage ingot extending left and right at the front portion and a heat storage ingot extending from the front portion to the middle portion in the front-rear direction at the central portion in the left-right direction are provided. A water supply connection pipe for supplying water for generating steam is provided at the front portion of the steam generation tank frame, and a drain pipe (drainage pipe) for discharging residual moisture is provided at the rear wall portion of the steam generation tank frame.

[0003] When heating the inside of the furnace at least by the upper heater in this deck oven, the steam generation tank frame of the steam generation tank disposed at the upper part inside the furnace is heated by the upper heater and stores heat in the heat storage ingot. When water is supplied into the steam generation tank through the water supply connection pipe at the timing when humid baking is desired, the water supplied into the steam generation tank touches the heat storage ingot and is immediately vaporized, and the steam generated inside the steam generation tank is blown out between the steam generation tank and the ceiling wall of the furnace. The blown-out steam hits the ceiling wall of the furnace and diffuses in all directions, and flows toward the furnace floor through the gap between the peripheral edge of the steam generation tank and the surrounding wall doors on all four sides inside the furnace.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the deck oven of the above-mentioned Patent Document 1, most of the water supplied into the steam generation tank through the water supply pipe touches the heat storage ingot and is immediately vaporized, and the steam generated inside the steam generation tank is blown out between the steam generation tank and the ceiling wall of the furnace. When excessive water is sent to the steam generation tank, it is discharged outside through the drain pipe and the drainage passage provided at the rear of the furnace. In this type of deck oven, the steam generation tank is detachably attached to the furnace for maintenance, and the drain pipe protruding rearward from the rear wall portion of the steam generation frame is inserted into the drainage passage provided at the rear of the furnace with a gap. The water discharged from the drain pipe is discharged into the drainage passage by natural outflow without water pressure, but the water flowing into the drainage passage from the drain pipe flows inside the furnace along the inner peripheral surface of the drainage passage and the outer peripheral surface of the drain pipe by surface tension, and there is a risk that a part of the water discharged from the drain pipe may flow down into the furnace. In this case, not only does the inside of the furnace become unhygienic due to the water flowing down, but also traces of the water flowing down remain on the rear wall inside the furnace. An object of the present invention is to make it difficult for the water sent from the steam generation dish to the drainage passage through the drain pipe to flow into the firing furnace.

Means for Solving the Problems

[0006] In order to solve the above problems, the present invention provides an oven cooking device comprising a baking furnace for baking an object to be cooked, a heater disposed at the upper part inside the baking furnace for heating the inside of the baking furnace, and a steam generating part disposed above the heater at the upper part inside the baking furnace for generating steam in the baking furnace. The steam generating part includes a steam generating dish disposed above the heater and heated by the heater, a water supply part for supplying water to the upper surface of the steam generating dish, and a drain pipe provided so as to protrude outward at the peripheral edge of the steam generating dish for discharging the water remaining in the steam generating dish. The tip of the drain pipe is inserted into a drain passage through a gap from a drain inlet disposed on one side wall of the baking furnace. An annular groove portion recessed inward from the tip opening toward the base end side is provided on the outer peripheral surface of the tip of the drain pipe.

[0007] In the oven cooking device configured as described above, there is a possibility that the water discharged from the tip opening of the drain pipe may flow through the slight gap formed between the outer peripheral surface of the drain pipe and the inner peripheral surface of the drain passage due to surface tension and flow down into the baking furnace. In this oven cooking device, since an annular groove portion recessed inward from the tip toward the base end side is provided on the outer peripheral surface of the tip of the drain pipe, the drain pipe is separated from the inner peripheral surface of the drain passage at the portion where the annular groove portion is formed, and the surface tension does not act on the water discharged from the tip opening of the drain pipe at the portion where the annular groove portion is formed. As a result, the water discharged from the drain pipe into the drain passage can be made less likely to flow into the baking furnace.

[0008] Another embodiment of the present invention includes a baking furnace for baking an object to be cooked, a heater disposed at the upper part inside the baking furnace for heating the inside of the baking furnace, and a steam generating unit disposed above the heater at the upper part inside the baking furnace for generating steam inside the baking furnace. The steam generating unit includes a steam generating dish disposed above the heater and heated by the heater, a water supply unit for supplying water to the upper surface of the steam generating dish, and a drain pipe provided so as to protrude outward at the peripheral edge of the steam generating dish for discharging the water remaining in the steam generating dish. The tip of the drain pipe is inserted into a drain passage through a gap from a drain inlet disposed on one side wall of the baking furnace. The oven cooking apparatus is characterized in that an annular protrusion protruding outward is provided on the outer peripheral surface of the tip of the drain pipe.

[0009] In this oven cooking apparatus, since an annular protrusion protruding outward is provided on the outer peripheral surface of the tip of the drain pipe, the drain pipe is separated from the inner peripheral surface of the drain passage at the base end side rather than the portion where the annular protrusion is formed, and the surface tension does not act on the water discharged from the tip opening of the drain pipe at the base end side rather than the portion where the annular protrusion is formed. Thereby, the water discharged from the drain pipe into the drain passage can be made difficult to flow into the baking furnace.

[0010] Another embodiment of the present invention includes a baking furnace for baking an object to be cooked, a heater disposed at the upper part inside the baking furnace for heating the inside of the baking furnace, and a steam generating unit disposed above the heater at the upper part inside the baking furnace for generating steam inside the baking furnace. The steam generating unit includes a steam generating dish disposed above the heater and heated by the heater, a water supply unit for supplying water to the upper surface of the steam generating dish, and a drain pipe provided so as to protrude outward at the peripheral edge of the steam generating dish for discharging the water remaining in the steam generating dish. The tip of the drain pipe is inserted into a drain passage through a gap from a drain inlet disposed on one side wall of the baking furnace. The oven cooking apparatus is characterized in that at least the tip of the drain pipe is inclined obliquely downward.

[0011] In this oven cooking device, since at least the tip of the drain pipe is inclined obliquely downward, the lower part of the tip opening of the drain pipe approaches the inner peripheral surface of the drain passage, and the lower part on the base end side from the tip opening of the drain pipe is separated from the lower part of the inner peripheral surface of the drain passage. As a result, the water discharged from the tip opening of the drain pipe does not have surface tension acting on the base end side from the tip opening. Thereby, the water discharged from the drain pipe into the drain passage can be made difficult to flow into the firing furnace.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Best Mode for Carrying Out the Invention

[0013] Hereinafter, an embodiment of the oven cooking device of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the oven cooking device 10 of the present invention heats and bakes bread dough or confectionery dough (object to be cooked) in a natural convection type firing furnace 20, and by opening the door 21 provided in the front part of the firing furnace 20, the object to be fired can be carried in and out of the firing furnace 20 from the front opening 20a. The oven cooking device 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 needed.

[0014] 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 portion inside the casing 11, and a baking furnace 20 is disposed in the remaining portion inside the casing 11. The baking furnace 20 bakes an object to be cooked such as bread dough or confectionery dough, and has a substantially rectangular parallelepiped shape with a front opening 20a formed in the front surface for loading and unloading the object to be cooked. A door 21 that closes the front opening 20a of the baking furnace 20 in an openable and closable manner is pivotally supported around a horizontal axis at the lower front portion of the casing 11.

[0015] As shown in FIGS. 3 to 5, 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 FIG. 4, a drain passage 24 using a pipe member for discharging the excess water in a steam generating section 40 described later to the outside is provided inside the heat insulating material 22 on the rear wall portion (one side wall portion) of the baking furnace 20. As shown in FIGS. 4 and 5, a drain inlet 24a of the drain passage 24 is disposed at the upper part of the rear wall portion of the baking furnace 20. As shown in FIGS. 3 and 5, the drain passage 24 extends to the outside of the casing 11 through the machine room 12. The introduction end portion of the drain passage 24 extends rearward from the drain inlet 24a and then extends obliquely rightward along the rear wall portion of the baking furnace 20.

[0016] As shown in FIGS. 2 and 4, a ceramic furnace floor plate 25 is provided at the lower part inside the baking furnace 20, and a tray containing an object to be cooked can be placed on the upper side of the furnace floor plate 25 inside the baking furnace 20. Left and right guides 26 extending along the front-rear direction are provided at both left and right edge portions of the furnace floor plate 25, and a guide 27 extending along the left-right direction is provided at the rear edge portion of the furnace floor plate 25. These guides 26 and 27 have a function of preventing the tray from being placed on the upper side of the furnace floor plate 25 while being biased left and right and rearward.

[0017] As shown in FIG. 4, a heater 30 is provided in the firing furnace 20. In this embodiment, a lower heater 31 is provided below the furnace floor plate 25 at the lower part of the firing furnace 20, and an upper heater 32 is provided at the upper part in the firing furnace 20. The lower and upper heaters 31 and 32 are each formed by using a heater element in the shape of a substantially U-shaped sheathed heater with an open right side. The lower heater 31 is arranged with three heater elements arranged side by side in the front-rear direction, and the upper heater 32 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 a furnace floor plate 25 with high heat storage performance is arranged above the lower heater 31, the upper heater 32 has a larger number of heater elements than the lower heater 31.

[0018] As shown in FIG. 4, a lower temperature sensor 33 is provided in the lower part of the firing furnace 20, and an upper temperature sensor 34 is provided in the upper part of the firing furnace 20. The lower temperature sensor 33 is disposed between the foremost heater element 31a of the lower heater 31 and the second heater element 31b from the front, and is used for controlling the lower heater 31. Further, the upper temperature sensor 34 is disposed at a position between the second heater element 32b from the front and the third heater element 32c from the front below the upper heater 32, and is used for controlling the upper heater 32. Note that the lower temperature sensor 33 is provided at the lower part of the right side surface of the firing furnace 20, and the upper temperature sensor 34 is provided at the upper part of the right side surface of the firing furnace 20. Therefore, the lower and upper temperature sensors 33 and 34 are arranged at positions not shown in FIG. 4, which is a cross-sectional view showing the left side surface side in the firing furnace 20. However, in FIG. 4, the height and the front-rear positions of the lower and upper temperature sensors 33 and 34 provided on the right side surface in the firing furnace 20 are indicated by broken lines.

[0019] As shown in FIGS. 4 and 5, a steam generation unit 40 is provided at the upper part inside the firing furnace 20. The steam generation unit 40 is arranged above the upper heater 32 inside the firing furnace 20 to generate steam inside the firing furnace 20. The steam generation unit 40 includes a steam generation tray 41 disposed above the upper heater 32, a heat storage plate 42 provided at the front part of the upper surface of the steam generation tray 41, a water supply unit 43 for supplying water above the steam generation tray 41, a drain pipe 46 for discharging the water remaining in the steam generation tray 41, and a steam generation lid 47 that covers the upper side of the steam generation tray 41 so as to form a steam generation space.

[0020] The steam generation tray 41 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 hold a small amount of water. Locking arms 41a that protrude outward at the front and rear are provided on both left and right sides of the steam generation tray 41. The locking arms 41a are locked to support brackets 20b that extend in the front-rear direction and are provided on the upper parts of the left and right inner side surfaces of the firing furnace 20. With the steam generation tray 41 locked to the support brackets 20b inside the firing furnace 20 by the locking arms 41a, a steam passage 41b is formed between the steam generation tray 41 and the inner side surfaces (front, rear, left, and right side surfaces) of the firing furnace 20. The steam passage 41b sends the steam generated above the steam generation tray 41 at the upper part inside the firing furnace 20 to the lower part of the firing furnace 20.

[0021] A strip-shaped heat storage plate 42 that extends in the left-right direction is provided at the front part of the upper surface of the steam generation tray 41. The heat storage plate 42 can store heat for generating steam at the front part of the steam generation tray 41. As shown in FIGS. 3 and 5, the water supply unit 43 supplies water above the steam generation tray 41 and includes a water supply pipe 44 led out from a water supply source and a water supply valve 45 interposed in the water supply pipe 44. The water supply pipe 44 extends from the outside of the casing 11 through the machine room 12 into the firing furnace 20, and the water supply port part of the water supply pipe 44 is led out above the heat storage plate 42 at the front part of the steam generation tray 41. The water supply valve 45 is interposed in the water supply pipe 44 inside the machine room 12, and the water from the water supply source is sent above the heat storage plate 42 through the water supply pipe 44 when the water supply valve 45 is opened.

[0022] As shown in FIGS. 4 and 5, a drain pipe 46 is provided at the rear edge (peripheral edge) of the steam generation dish 41 so as to project rearward. The water that is supplied from the water supply section 43 to the steam generation dish 41 and remains without evaporating is discharged from the drain pipe 46. The tip of the drain pipe 46 is inserted into the introduction end of the drain passage 24 through a drain inlet 24a disposed at the upper part of the rear wall of the firing furnace 20. The outer diameter of the drain pipe 46 is slightly smaller than the inner diameter of the drain passage 24, and the tip of the drain pipe 46 is inserted into the introduction end of the drain passage 24 from the drain inlet 24a with a slight gap therebetween. An annular groove portion 46a that is recessed inward from the tip opening toward the base end side is formed on the outer peripheral surface of the tip of the drain pipe 46. The water that is supplied from the water supply section 43 to the steam generation dish 41 and remains without evaporating is discharged from the drain pipe 46 into the drain passage 24 by natural outflow without any water pressure applied. The water discharged into the drain passage 24 from the tip opening of the drain pipe 46 flows between the outer peripheral surface of the drain pipe 46 and the inner peripheral surface of the drain passage 24 due to surface tension, and there is a possibility that the drain water flows into the firing furnace 20 from the drain inlet 24a of the drain passage 24. Since the annular groove portion 46a is formed at the tip of the drain pipe 46, the outer peripheral surface of the drain pipe 46 is separated from the inner peripheral surface of the drain passage 24 at the portion where the annular groove portion 46a is formed, and the water discharged from the tip opening of the drain pipe 46 does not have surface tension acting thereon at the portion where the annular groove portion 46a is formed. As a result, the water discharged from the drain pipe 46 into the drain passage 24 is less likely to flow into the firing furnace 20.

[0023] As shown in FIGS. 4 and 5, a steam generation lid 47 is provided above the steam generation dish 41 to cover the upper side thereof so as to form a steam generation space for generating steam. A number of steam passage holes 47a for allowing steam to pass upward are formed in the steam generation lid 47 from the front part to the whole of the rear part. The steam generation lid 47 suppresses the upward flow by covering the steam generated in the steam generation space above the steam generation dish 41 with the parts other than the part where the steam passage holes 47a are formed, and causes the steam mainly generated at the front part of the steam generation space to spread to the rear part. In this embodiment, the steam generation lid 47 is sized to cover the upper side of the steam generation dish 41, and a stainless-steel punching plate having a number of steam passage holes 47a formed from the front part to the whole of the rear part is used.

[0024] The steam mainly generated by the heat storage plate 42 at the front part of the steam generation dish 41 is suppressed from flowing upward by the parts other than the steam passage holes 47a of the steam generation lid 47, and the steam whose upward flow is suppressed is discharged from a number of steam passage holes 47a to the upper side of the steam generation lid 47 in the process of flowing from the front part to the rear part. The steam discharged to the upper side of the steam generation lid 47 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 41b between the steam generation dish 41 and the inner surface of the firing furnace 20. In this way, the steam generated in the steam generation part 40 also flows down to the whole including the rear part mainly at the front part of the firing furnace 20.

[0025] As shown in FIGS. 1 to 3, an operation panel 50 is provided on the right side of the front surface of the casing 11. The operation panel 50 includes a display unit 51, an operation unit 52, and a buzzer (not shown). In this embodiment, a liquid crystal panel (LCD panel) is used as the display unit 51, and various settings such as the operation process of the oven cooking device 10 and the detected temperature in the firing furnace 20 can be displayed. In this embodiment, various operation buttons and a jog dial are used as the operation unit 52, and various settings such as the temperature setting of the operation process for heating the firing furnace 20, the output settings of the lower and upper heaters 31 and 32, and the setting of the cooking time, and the operation content such as the steam supply operation can be input. The buzzer can notify the end of the operation process for heating the firing furnace 20, the end of the cooking time, and the error information by outputting sounds such as buzzer sounds.

[0026] As shown in FIG. 6, the oven cooking device 10 includes a control device 60. The control device 60 is connected to a lower heater 31 (heater elements 31a to 31c), an upper heater 32 (heater elements 32a to 32d), a lower temperature sensor 33, an upper temperature sensor 34, a water supply valve 45, and an operation panel 50. The control device 60 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.

[0027] The control device 60 includes, in the ROM, an operation process for controlling the operations of the lower and upper heaters 31 and 32 so that the temperature in the baking furnace 20 becomes a set temperature. When this operation process is executed, the set outputs of the lower and upper heaters 31 and 32 can be changed in six steps from 0% to 100%. The operation process includes a manual operation for setting the temperature in the baking furnace 20 and the outputs of the lower and upper heaters 31 and 32, and a program operation in which the temperature in the baking furnace 20 and the outputs of the lower and upper heaters 31 and 32 are preset, and the manual operation and the program operation can be selected.

[0028] Further, when the control device 60 is executing the operation process, it includes a timing process for timing by a timer the end of the set cooking time for baking the object to be cooked. When the control device 60 executes the timing process and the set cooking time for baking the object to be cooked ends, it causes the display unit 51 and the buzzer to output information that the set cooking time has ended.

[0029] In addition, when the control device 60 is executing the operation process, it can execute a steam generation process for generating steam by the steam generation unit 40 in the baking furnace 20. When the control device 60 executes the steam generation process, it opens the water supply valve 45 for a preset set time (1 second to 5 seconds), supplies water from the water supply pipe 44 to the upper side of the heat storage plate 42 of the steam generation dish 41, brings it into contact with the upper surface of the heat storage plate 42 and the steam generation dish 41, and evaporates the water to generate steam. The steam generated above the steam generation dish 41 is discharged to the upper side of the steam generation lid 47 through the steam passage hole 47a, and the steam discharged to the upper side of the steam generation lid 47 flows down to the lower part of the baking furnace 20 through the passage 41b between the steam generation dish 41 and the inner surface of the baking furnace 20. In this way, by executing the steam generation process, steam can be temporarily applied 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 45 can be set within the time range of 1 second to 5 seconds.

[0030] Next, the baking process of the object to be cooked in the baking furnace 20 will be described. When an operation signal of an operation process consisting of a manual operation or a program operation is input by operating the operation unit 52 of the operation panel 50, the control device 60 controls the energization (operation) of the lower heater 31 based on the detected temperature of the lower temperature sensor 33, and controls the energization (operation) of the upper heater 32 based on the detected temperature of the upper temperature sensor 34, so that the inside of the baking furnace 20 is heated and controlled to the set temperature. The lower part of the inside of the baking furnace 20 is heated by the heat generation of each heater element 31a - 31c of the energization - controlled lower heater 31, and is also heated by the radiant heat generated from the upper furnace floor plate 25 heated by each heater element 31a - 31c of the lower heater 31. In addition, the upper part of the inside of the baking furnace 20 is heated by the heat generation of each heater element 32a - 32d of the energization - controlled upper heater 32, and is also heated by the heat rising by natural convection from the lower part of the inside of the baking furnace 20.

[0031] Open the door 21, carry in a tray containing the object 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 time measurement of the set cooking time is input by operating the operation unit 52 of the operation panel 50, the control device 60 starts the time measurement process until the set cooking time ends. The object to be cooked placed on the tray is heated in the baking furnace 20 by the lower and upper heaters 31 and 32 which are controlled to be energized by the above-described operation process.

[0032] Also, when, during the execution of the operation process, an operation signal for executing a steam generation process for generating steam in the baking furnace 20 is input by operating the operation unit 52, the control device 60 opens the water supply valve 45 for a set time. The water supplied from the water supply source is sent from the water supply pipe 44 to the upper side of the heat storage plate 42 of the steam generation dish 41, and when most of the sent water comes into contact with the heat storage plate 42, it vaporizes into steam. A part of the water flows from the heat storage plate 42 to the steam generation dish 41 and vaporizes into steam. The steam generated mainly at the front heat storage plate 42 of the steam generation dish 41 is suppressed from flowing upward by the portions other than the steam passage holes 47a of the steam generation lid 47. The steam whose upward flow is suppressed is discharged upward through the many steam passage holes 47a in the process of flowing from the front to the rear, and flows down to the entire lower part including the rear part mainly at the front part of the baking furnace 20 through the passage 41b between the inner peripheral surface of the baking furnace 20. The object to be cooked in the baking furnace 20 is temporarily given steam by the steam flowing down from the upper part in the baking furnace 20. When an excessive amount of water is supplied to the steam generation dish 41, the excess water on the upper side of the steam generation dish 41 is sent from the drain pipe 46 to the drain passage 24 and discharged to the outside of the casing 11.

[0033] When the set cooking time is reached after starting the time measurement process, the control device 60 outputs information indicating that the baking cooking has ended after the set cooking time has elapsed to the display unit 51 of the operation panel 50 and the buzzer. Then, information indicating that the baking cooking has ended after the set cooking time has elapsed is displayed on the display unit 51, and information indicating that the baking cooking has ended is emitted from the buzzer, for example, by a buzzer sound.

[0034] The oven cooking device 10 configured as described above includes a baking furnace 20 for baking an object to be cooked such as bread dough, an upper heater (heater) 32 disposed above the upper part of the baking furnace 20 for heating the inside of the baking furnace 20, and a steam generating section 40 disposed above the upper heater 32 at the upper part of the baking furnace 20 for generating steam in the baking furnace 20. The steam generating section 40 includes a steam generating dish 41 disposed above the upper heater 32 and heated by the upper heater 32, a water supply section 43 for supplying water to the upper surface of the steam generating dish 41, and a drain pipe 46 provided so as to project rearward (outward) at the rear edge (peripheral edge) of the steam generating dish 41 for discharging the water remaining in the steam generating dish 41.

[0035] In this oven cooking device 10, the steam generating dish 41 is detachably supported at the upper part of the baking furnace 20, and the drain pipe 46 is inserted into the drain passage 24 through a slight gap so that the drain pipe 46 can be easily inserted into the drain passage 24 and easily pulled out from the drain passage 24. When water is discharged from the drain pipe 46, the water discharged from the tip opening of the drain pipe 46 may flow through the slight gap formed between the outer peripheral surface of the drain pipe 46 and the inner peripheral surface of the drain passage 24 by surface tension and flow into the baking furnace 20. In this oven cooking device 10, an annular groove portion 46a that is recessed inward from the tip toward the base end side is provided on the outer peripheral surface of the tip portion of the drain pipe 46. Therefore, the drain pipe 46 is separated from the inner peripheral surface of the drain passage 24 at the portion where the annular groove portion 46a is formed, and the surface tension does not act on the portion where the annular groove portion 46a is formed for the water discharged from the tip opening of the drain pipe 46. Thereby, the water discharged from the drain pipe 46 to the drain passage 24 can be made less likely to flow into the baking furnace 20.

[0036] In the oven cooking apparatus 10 of this embodiment, by forming an annular groove portion 46a on the outer peripheral surface of the tip of the drain pipe 46, it is possible to prevent the water discharged into the drainage passage 24 from flowing into the firing furnace 20. However, in the embodiment shown in FIG. 7, an annular protrusion 46b protruding outward is provided on the outer peripheral surface of the tip of the drain pipe 46. In the oven cooking apparatus 10 of this embodiment, the drain pipe 46 is separated from the inner peripheral surface of the drainage passage 24 on the proximal side of the portion where the annular protrusion 46b is formed, and the water discharged from the tip opening of the drain pipe 46 is such that the surface tension does not act on the proximal side of the portion where the annular protrusion 46b protruding outward is formed. Also in the oven cooking apparatus 10 of this embodiment, the water discharged from the drain pipe 46 into the drainage passage 24 can be made difficult to flow into the firing furnace.

[0037] In still another embodiment shown in FIG. 8, the drain pipe 46 is inclined obliquely downward. The tip opening of the drain pipe 46 approaches the inner peripheral surface of the drainage passage 24, and the proximal side of the drain pipe 46 from the tip opening is separated from the inner peripheral surface of the drainage passage 24, so that the surface tension does not act on the proximal side of the tip opening of the drain pipe 46. Thereby, the water discharged from the drain pipe 46 into the drainage passage 24 can be prevented from flowing into the firing furnace 20. Note that only the tip portion of the drain pipe 46 inserted into the drainage passage 24 may be inclined obliquely downward (at least only the tip portion is inclined obliquely downward).

[0038] In the oven cooking apparatus 10 configured as described above, the drain pipe 46 is provided so as to protrude rearward from the rear edge portion as the peripheral edge portion of the steam generation tray 41, and the tip portion of the drain pipe 46 is inserted into the drainage passage 24 from the drainage inlet 24a disposed on the rear wall portion as one side wall portion of the firing furnace 20. However, it is not limited to this, and the drain pipe 46 may be provided so as to protrude leftward or rightward from the left edge portion or the right edge portion as the peripheral edge portion of the steam generation tray 41, and the tip portion of the drain pipe 46 may be inserted into the drainage passage 24 from the drainage inlet 24a disposed on the left wall portion or the right side portion as one side wall portion of the firing furnace 20.

Description of Symbols

[0039] 10…Oven cooking device, 20…Firing furnace, 24…Drainage passage, 24a…Drainage inlet, 32…Heater (upper heater), 40…Steam generation section, 41…Steam generation dish, 46…Drain pipe, 46a…Annular groove section, 46b…Annular protrusion.

Claims

1. A baking furnace for baking an object to be cooked, a heater disposed at the upper part inside the baking furnace for heating the inside of the baking furnace, and a steam generation part disposed above the heater at the upper part inside the baking furnace for generating steam inside the baking furnace, wherein the steam generation part includes a steam generation dish disposed above the heater and heated by the heater, a water supply part for supplying water to the upper surface of the steam generation dish, and a drain pipe provided so as to protrude outward at the peripheral edge of the steam generation dish for discharging the water remaining in the steam generation dish, and the tip of the drain pipe is inserted into a drain passage through a gap from a drain inlet disposed on one side wall of the baking furnace, and the oven cooking device is characterized in that an annular groove portion recessed inward from the tip opening is provided on the outer peripheral surface of the tip of the drain pipe.

2. A baking furnace for baking an object to be cooked, a heater disposed at the upper part inside the baking furnace for heating the inside of the baking furnace, and a steam generation part disposed above the heater at the upper part inside the baking furnace for generating steam inside the baking furnace, wherein the steam generation part includes a steam generation dish disposed above the heater and heated by the heater, a water supply part for supplying water to the upper surface of the steam generation dish, and a drain pipe provided so as to protrude outward at the peripheral edge of the steam generation dish for discharging the water remaining in the steam generation dish, and the tip of the drain pipe is inserted into a drain passage through a gap from a drain inlet disposed on one side wall of the baking furnace, and the oven cooking device is characterized in that an annular protrusion protruding outward is provided on the outer peripheral surface of the tip of the drain pipe.

3. A baking furnace for baking an object to be cooked, a heater disposed at the upper part inside the baking furnace for heating the inside of the baking furnace, and a steam generation part disposed above the heater at the upper part inside the baking furnace for generating steam inside the baking furnace, wherein the steam generation part includes a steam generation dish disposed above the heater and heated by the heater, a water supply part for supplying water to the upper surface of the steam generation dish, and a drain pipe provided so as to protrude outward at the peripheral edge of the steam generation dish for discharging the water remaining in the steam generation dish, and the tip of the drain pipe is inserted into a drain passage through a gap from a drain inlet disposed on one side wall of the baking furnace, and the oven cooking device is characterized in that An oven cooking apparatus characterized in that at least the tip of the drain pipe is inclined obliquely downward.

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