JP2008032304A - Heating cooker and steam generating device for heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve heating effect in a case where the heating is performed while partitioning a heating chamber by a square plate, in a steam heating cooker. <P>SOLUTION: Shelf rails 23, 23 for detachably mounting the square plate 26 are disposed on both side walls 21, 22 opposed to each other, of a heating chamber 2, one side wall 22 is provided with steam jetting nozzles 52, 52a at upper and lower positions through the shelf rail 23, and a steam generating device 4 for jetting the steam from the steam jetting nozzle 55 is disposed at an outer side of the heating chamber 2. As the steam is filled in both spaces through the square plate 26, high heating effect to food can be achieved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heating cooker having a steam cooking function.

A conventional cooking device has a magnetron for microwave heating and a heater for oven cooking as a heating source for heating food contained in the heating chamber.
Heaters were installed at the top and bottom of the heating chamber.
Furthermore, in addition to the functions of microwave heating and heater heating, there has been a cooking device having a steam heating cooking function.
In this type of cooking device, shelf rails on which food dishes can be placed on the opposite side walls in the heating chamber and on which square dishes for performing heating cooking can be placed are provided, and steam is placed on the side walls of the heating chamber above the shelf rails. One or a plurality of ejection nozzles are arranged side by side (for example, Patent Document 1).

  In addition, the heating chamber is provided with an air inlet and an air outlet, and the cooling air sucked from the air intake vent prevents condensation on the front door of the heating chamber due to steam generated from the heated food. In addition, odors are prevented from being generated in the heating chamber.

In addition, a baffle plate projects from the wall surface of the steam generation chamber of the steam generation apparatus having the steam ejection nozzle at a position below the steam ejection nozzle (Patent Document 1).
The baffle plate serves to prevent boiling water from running down the wall surface from the lower part of the steam generation chamber and entering the heating chamber from the steam ejection nozzle.

JP 2006-84059 A (see [0011] and FIG. 10, [0012] [0024] and FIG. 3)

  In a conventional cooking device, for example, when oven cooking is performed while steam is generated from a steam ejection nozzle, the heating chamber is an upper space between the top surface of the heating chamber and the upper surface of the square plate, and the square plate. It is partitioned into a lower space between the lower surface and the heating chamber bottom surface. Since the steam is ejected from the steam ejection nozzle in the upper space where the food is disposed, the food is heated by the heater while being steam-heated, and cooking is performed while being appropriately humidified by the food. However, since the heat of the heater in the lower part of the heating chamber heats the lower surface of the square dish through the lower space, it is necessary to heat air with a high heat insulating effect, and it takes time to increase the temperature.

  Moreover, in the conventional cooking device, the steam generated from the heated food is condensed on the heating chamber side of the window portion of the door that opens and closes the front opening of the heating chamber, so that the visibility in the heating chamber is reduced. In order to prevent this, a part of the cooling air such as magnetron is sucked into the heating chamber from the intake port of the heating chamber, passes near the heating chamber side of the door, and is exhausted from the exhaust port of the heating chamber. The inlet and outlet of the heating chamber are formed at substantially the same height on opposite side walls of the heating chamber in order to make the flow of cooling air in the heating chamber smooth. Even if a steam ejection device is attached to such a configuration, and the steam is ejected from the steam ejection nozzle of the device into the heating chamber, the steam is lighter than the air in the heating chamber, so it rises immediately without reaching the food. However, the steam was exhausted from the exhaust port along the top surface of the heating chamber on the flow of cooling air from the intake port, and the steam was not fully utilized for cooking.

In addition, since the baffle plate is formed in a U-shaped cross section in which both sides are bent upward, condensed water accumulates in the recessed portion of the baffle plate, causing a problem of lowering the temperature in the vicinity of the vapor jet nozzle, Also, there are problems in terms of hygiene, such as the accumulation of scale due to prolonged use.
The present invention provides a cooking device that solves the above problems.

  Claim 1 is a cooking device for cooking food in the heating chamber (2), and the opposite side walls (21), (22) of the heating chamber (2) are provided with a square plate (2) in the heating chamber (2). 26) is provided with rack rails (23) and (23) for placing, and on one side wall (22), a steam ejection nozzle (52) (52) ( 52a) is open, and a steam generator (4) for ejecting steam from the steam ejection nozzles (52) (52a) is provided outside the heating chamber (2).

  Claim 2 is a heating cooker for cooking food in the heating chamber (2), wherein a steam jet nozzle (52) is provided on one side wall (22) of the opposite side walls (21), (22) of the heating chamber (2). ) Is located, a steam generator (4) for ejecting steam from the steam ejection nozzle (55) is provided outside the heating chamber (2), and the steam ejection nozzle (52) of the heating chamber (2) is located The side wall (22) is provided with an exhaust port (28), the other side wall (21) is provided with an intake port (27), and the intake port (27) and the exhaust port (28) are connected to the heating chamber (22). The side walls are opposite to each other in the front-rear direction, and the exhaust port (28) is located higher than the intake port (27).

  Claim 3 is a cooking device for cooking food in the heating chamber (2), wherein a steam generator (4) is provided outside the heating chamber (2), and the steam generator (4) is provided inside. The casing (41) having the steam generation chamber (51) communicates with the steam opening provided in the steam generation chamber (51), and the steam generated in the steam generation chamber (51) can be ejected to the heating chamber (2). A steam jet nozzle (52), a heater (42) for heating the water in the steam generation chamber (51), and water boiled in the steam generation chamber (51) from the steam jet nozzle (52) to the heating chamber (2) The baffle plate (53) is provided below the steam opening in the steam generation chamber (51) to prevent intrusion into the inside, and the upper surface is inclined so that water drops can be easily dropped.

A fourth aspect of the present invention is the heating cooker according to the third aspect, wherein the water tank (19) for storing water and the water in the water tank (19) are connected to the steam generator (4) via a pipe line (61a). A pump (61b) to be supplied and a controller (8) for controlling the operation of the heater and pump (61b) of the steam generator (4),
The steam generation chamber of the steam generator (4) has an upper steam generation chamber (51) arranged in the upper stage and a lower steam generation chamber (51a) arranged in the lower stage,
The heater of the steam generator (4) has a heater (42) for heating water in the upper steam generation chamber (51) and a heater (42a) for heating water in the lower steam generation chamber (51a),
The steam jet nozzle (52) of the steam generator (4) is disposed in the heating chamber (2) above the shelf rail (23) for placing the square dish (26), and the upper steam generating chamber (51). A steam ejection nozzle (52) communicating with the steam rail, and a steam ejection nozzle (52a) disposed at a position below the shelf rail (23) and communicating with the lower steam generation chamber (51a),
The upper steam generation chamber (51) is provided at a position lower than the water supply port (61) to which the pipe (61a) connected to the pump (61b) is connected and the steam opening to the steam ejection nozzle (52). And a passage (59) for flowing water overflowing the weir (58) to the lower steam generation chamber (51a),
The lower steam generation chamber (51a) has a thermistor that detects the temperature of the steam generation device (4).
The controller (8) energizes the heaters (42) and (42a) to heat the steam generator (4), and drives the pump (61b) when the temperature detected by the thermistor (63) reaches the steam ejection start temperature. Then, the water in the water tank (19) is supplied from the water supply port (61) into the upper steam generation chamber (51).

  Claim 5 is the heating cooker according to claim 4, wherein both side walls (21), (22) of the heating chamber (2) are formed of a metal plate, and the shelf rail (23) is formed by pressing the metal plate. The heater (42) of the steam generator (4) is a rod heater, and is formed in a rail shape so as to swell toward the heating chamber (2), and is a recess corresponding to the shelf rail (23) of the heating chamber side wall (22). Opposite the strip (23b) and is provided along the concave strip (23b).

  A sixth aspect of the present invention is the heating cooker according to any one of the first to fifth aspects, wherein the casing (41) of the steam generator (4) has a gap between the outer surface of the side wall (22) of the heating chamber (2). (90) is provided and heat insulation is achieved by an air layer generated by the gap (90).

  According to a seventh aspect of the present invention, in the cooking device according to any one of the first to sixth aspects, the steam ejection nozzles (52) and (52a) are formed so that the steam is ejected obliquely downward.

  According to an eighth aspect of the present invention, in the cooking device according to any one of the first to seventh aspects, the nozzle holes (57) and (57a) of the steam ejection nozzles (52) and (52a) are narrowed toward the tip side.

  The steam generator for a heating cooker according to claim 9 is the steam generator (4) for a heating cooker for cooking food in the heating chamber (2), wherein the steam generating chamber (51) has a steam ejection nozzle ( 52) is provided with a steam opening (51b) communicating with the lower part, and a heater (42) is provided in the vicinity of the lower part, and the water boiled in the steam generation chamber (51) is provided at the lower part of the steam opening (51b). A baffle plate (53) is provided to prevent entry into the heating chamber (2) from (52), and the upper surface of the baffle plate is inclined so that water drops can be easily dropped.

  According to a tenth aspect of the present invention, in the steam generator for a heating cooker according to the ninth aspect, a plurality of ejection nozzles (52), (52) are provided side by side, corresponding to each of the ejection nozzles (52), (52). A plate (53) (53) is provided, and an auxiliary baffle plate (54) overlaps with the ends of both baffle plates (53) (53) below the adjacent baffle plates (53) (53). A steam flow path is formed between the baffle plates (53) and (53) and the auxiliary baffle plate (54).

  An eleventh aspect of the present invention is the steam generator for a heating cooker according to the ninth or tenth aspect, wherein the baffle plate (53) is formed in a mountain shape having two guide surfaces having different inclination directions.

  In the cooking device of claim 1, the steam ejection nozzles (52) and (52a) are arranged at the upper and lower positions across the shelf rail (23), so that the square dish (26 ) Is cooked by steam ejected from the steam ejection nozzle (52), and steam is also ejected from the steam ejection nozzle (52a) to the lower side of the square dish (26). A heating effect can be obtained.

The heating cooker according to claim 2 has an exhaust port (28) on the side wall (22) where the steam jet nozzle (52) of the heating chamber (2) is located, and an intake port (27) on the other side wall (21). The intake port (27) and the exhaust port (28) are opposite to each other in the longitudinal direction of the side wall of the heating chamber (2), and the exhaust port (28) is provided higher than the intake port (27). Therefore, the steam ejected from the steam ejection nozzle (52) is not discharged straight from the exhaust port (28). Further, the steam ejected from the steam ejection nozzle (52) tries to advance toward the opposite side wall of the heating chamber while rising, but the air flowing in from the intake port (27) located lower than the exhaust port (28) The steam, which is going to rise upward, is drawn downward into the flow and spreads widely in the heating chamber (2). For this reason, the waste from which the high-temperature steam is immediately exhausted can be eliminated.
Preferably, the air inlet (27) is located within a range of a half height position from the ceiling of the heating chamber (2).

The heating cooker according to claim 3 is configured such that water boiled in the steam generation chamber (51) enters the heating chamber (2) from the steam ejection nozzle (52), that is, the steam generation of the steam generation device (4). Even if boiling water runs up the wall of the steam generation chamber (51) in the chamber (51), it is blocked by the baffle plate (53) and flows into the heating chamber (2) from the steam ejection nozzle (52). The heating chamber (2) is not submerged.
Since the upper surface of the baffle plate (53) is inclined, even if condensed water adheres, it quickly reaches the inclined end along the inclination and drops. For this reason, water does not collect on the baffle plate (53), and adhesion and accumulation of scale can be prevented as much as possible.

A steam generator (4) for a heating cooker according to claim 4 includes a thermistor (63) in a lower steam generating chamber (51a) having a casing (41) having an upper steam generating chamber (51) and a lower steam generating chamber (51a). ) And the controller (8) drives the pump (61b) when the temperature detected by the thermistor (63) reaches the steam ejection start temperature, and supplies water in the water tank (19) to the water supply port ( Since the water is supplied from 61) into the upper steam generation chamber (51), the steam supplied into the steam generation chamber (51) (51a) can be supplied to the heating chamber (2) without overflowing.
For example, when the thermistor (63) is provided on the upper stage of the casing (41), the water state of the lower steam generation chamber (51a) cannot be grasped, and if the lower heater (42a) breaks down, There is a possibility that water accumulated in the steam generation chamber (51a) may flow into the heating chamber (2) from the lower steam ejection nozzle (52a).

  In the heating cooker according to claim 5, the bar heater (42) of the steam generator (4) is opposed to the recess (23b) corresponding to the shelf rail (23) of the heating chamber side wall (22) and the recess ( 23b), the section corresponding to the heater (42) has a large cross-sectional width of the heat insulation layer, so that it is possible to effectively prevent heat from being taken away from the casing (41).

  In the cooking device of claim 6, an air insulation layer is formed in the gap (90) between the casing (41) of the steam generator (4) and the side wall (22) of the heating chamber (2). Therefore, it is possible to prevent the heat of the casing (41) from being taken away by the side wall (22) and reducing the ability to generate steam.

In the cooking device of claim 7, since the steam is ejected obliquely downward from the steam ejection nozzle (52), the lower portion of the heating chamber (2) is quickly filled with steam, and the bottom of the heating chamber (2) is filled with food. Even when positioned, the food can be effectively heated.
Moreover, the time until the steam rises and is discharged from the exhaust port (28) can be increased, and the residence time can be extended in the heating chamber (2) of the high-temperature steam, so that the heating effect on the food can be enhanced.

  In the cooking device of claim 8, since the nozzle hole (57) of the steam jet nozzle (52) is narrowed toward the tip side, the speed of the steam flow is increased and the direction of the steam flow is determined. It is suitable when it is better to apply to the food directly.

  The steam generator of claim 9 has the same effect as that of claim 3.

  The steam generator according to claim 10 is configured such that the baffle plates (53) and (53) are arranged between the baffle plates (53) and (53) with respect to the baffle plates (53) and (53) provided below the plurality of jet nozzles (52) and (52) side by side. Since there is an auxiliary baffle plate (54) that overlaps the ends of both baffle plates (53) and (53) below, the flow path for boiling water to run straight up will be blocked. Further, it is possible to more effectively prevent boiling water from running up and entering the heating chamber (2) from the steam ejection nozzle (52).

  Since the baffle plate (53) of the steam generator for a heating cooker according to claim 11 is formed in a mountain shape having two guide surfaces with different inclination directions, it boiles straight upward from below the baffle plate (53). Even if the water runs up, it is always guided downward along one of the slopes and drops from the lower end of the slope. If the baffle plate (53) is merely tilted downward in one direction, the boiling water rushes up along the baffle plate (53), and further along the wall of the steam generation chamber (51) from the top of the slope. There is a possibility that the steam rushes up and enters the heating chamber (2) from the steam ejection nozzle (52).

Based on FIG. 1 thru | or FIG. 5, the schematic structure of the whole cooking-by-heating machine is demonstrated.
The cooking device according to the embodiment includes a microwave heating cooking function and a heater heating cooking function in addition to the steam heating cooking function.
The front surface of the cooker body (1) is open, and a heating chamber (2) for storing food to be cooked is formed inside.
A door (20) is provided at the front opening of the heating cooker body (1). The door (20) is pivotally supported at the lower part so as to be rotatable.

The operation panel (11) is provided on the right side of the door, and the operation panel (11) is equipped with input keys (11a), display unit (11b), start button (11c), and other equipment necessary for cooking operations. Has been.
The input key group (11a) is used to select or set a heating condition, an automatic cooking menu, and the like. The display unit (11b) displays the input heating conditions, the remaining heating time, and the like. The start button (11c) is operated at the start of cooking.
As shown in FIG. 3, the cooker body (1) is provided with large and small spaces (12) and (13) on the left and right sides of the heating chamber (2), and the right-side space (12) has an electrical component group (3). Is housed. The right space (12) is also referred to as an electrical component room because the electrical component group (3) is accommodated.
In order to send air into the electrical component group (3), the magnetron (31) that generates microwaves, which is one of the heating sources, the inverter circuit (33), the cooling of the right space (12), and the heating chamber (2) Fan (32) etc. are included.
The inverter circuit (33) is a drive circuit for converting a commercial power source into a high frequency power source and supplying the high frequency power to the magnetron (31) to excite the magnetron (31).
In addition, an infrared sensor (12a) is disposed on the right space (12). The infrared sensor (12a) catches infrared rays radiated from the food in the heating chamber (2) via the detection conduit (12b) that opens to the heating chamber (2), and the food temperature according to the amount of infrared rays. Is detected.
A steam generator (4) is accommodated in the left space (13). The steam generator (4) will be described in detail later.
At the bottom of the heating chamber (2), there is provided an antenna housing chamber (16) formed by being recessed downward. A waveguide (15) is provided in which one side is connected to the bottom surface of the antenna housing chamber (16) and the other is connected to a magnetron antenna (31a) for exciting microwaves. The microwave excited by the magnetron (31) is radiated from the magnetron antenna (31a) into the waveguide (15) and propagates to the antenna accommodation chamber (16) through the waveguide (15). .
A motor (18) is attached below the portion of the waveguide (15) connected to the antenna housing (16), and a Teflon (registered trademark) motor shaft (15a) is installed in the waveguide (15). ) Is protruding. A portion of the waveguide (15) connected to the antenna housing (16) is provided with a metal antenna shaft (17a) penetrating from the antenna housing (16) to the waveguide (15). The antenna shaft (17a) is connected to a Teflon motor shaft (15a) protruding from the motor (18) into the waveguide (15). In the antenna accommodating chamber (16), the antenna (17) having a horizontal plane is connected to the antenna shaft (17a), and the antenna (17) can rotate as the motor (18) rotates. The microwave in the waveguide (15) is propagated to the antenna (17) through the antenna shaft (17a), and is radiated from the antenna (17) into the antenna accommodating chamber (16). At this time, since the antenna (17) is rotated by the motor (18), the microwave is radiated while rotating and is further diffused.
The antenna accommodating chamber (16) is partitioned from the heating chamber (2) by a ceramic bottom plate on which food to be microwave-heated can be directly placed. The microwave radiated from the antenna (18) into the antenna housing part (16) passes through the bottom plate and is supplied into the heating chamber (2) to heat the food by microwave.
A lower heater (71), which is a sheathed heater, is provided in the antenna accommodating chamber (16). The lower heater (71) operates together with a flat heater (7) above the heating chamber (2), which will be described later, during cooking in the oven, and radiates the food in the heating chamber (2) through the bottom plate.
A water tank (19) is provided in the front lower part of the heating chamber (2) and in front of the motor (18) so that it can be pulled out. The water tank (19) is connected to the steam generator (4) via a pump (61b) and a water injection hose (61a).
The water tank (19) is located slightly to the left of the heating chamber (2), that is, away from the right side space (12) that houses the electrical component group (3). Even if the water overflows, the electrical component group The impact on (3) is reduced.
A flat heater (7) is provided on the ceiling of the heating chamber (2).
The left and right side walls (21), (22) and the rear wall of the heating chamber (2) are formed of metal plates. The bottom plate (29) of the heating chamber (2) is made of ceramic, and is reflected and stirred by the rotating antenna (17) of the microwaves transmitted through the waveguide (15) and transmitted through the bottom plate (29). (2) makes it possible to irradiate widely without spots.
The wall surface of the heating chamber (2) is provided with an oven thermistor (8a) (described in FIG. 10) for detecting the temperature (170 to 300 ° C.) in the heating chamber during oven cooking.

When both sides (21) and (22) of the heating chamber (2) store the metal square plate (26) on which the food is placed in the heating chamber (2) for cooking the food F. Shelf rails (23), (23), (24), (24), (25), and (25) that can be placed are provided in three stages. Each shelf rail is formed by pressing a metal plate and inflating it in the shape of a rail extending in the front-rear direction on the heating chamber (2) side, and on the back of each shelf rail (23) (24) (25) There is a groove (23b).
The upper shelf rails (23) and (23) are slightly above the effective height of the heating chamber (2), and the middle shelf rails (24), (24), (25) and (25) are The heating chamber (2) is slightly below the effective height of the height (2).

  As shown in FIG. 4, the side wall (21) on the steam generator (4) side of the heating chamber (2) is located above the upper shelf rail (23), and the upper shelf rail (23) and the middle shelf rail. The holes (22a), (22a), (22a), (22a) through which the steam jet nozzles (52), (52), (52a), (52a), which will be described later, appear between the steam generator (4) ) Are set up side by side.

In the heating chamber (2), an exhaust port (28) is provided on the side wall (22) where the vapor ejection nozzle (52) is located, and an intake port (27) is provided on the other side wall (21).
In the right space (12) that houses the electrical component group (3), a duct (34) is provided close to the side wall (21) of the heating chamber (2), and the side wall (21), the duct (34), An air flow path (35) is formed between them.
The air flow generated by the rotation of the fan (32) disposed in the right space (12) cools the left space (13) and passes through the flow path (35) from the intake port (27) to the heating chamber. Supplied to (2). The air flow supplied to the heating chamber (2) passes through the heating chamber side of the door (20), that is, near the so-called inner side, and reaches the exhaust port (28). In the central portion of the door (20), a window portion is formed so that the heating chamber can be seen even during heating. In particular, when microwave heating is performed, steam generated from the food condenses on the inside of the door (20) and becomes so-called cloudy, thereby reducing visibility in the heating chamber. In order to suppress this fogging, the air flow from the air inlet (27) flows near the inside of the door (20), thereby reducing the contact of steam with the door (20) and reducing condensation. is there.

The positional relationship between the front and rear of the air inlet (27) and the air outlet (28) is opposite to each other. In the embodiment, the air inlet (27) is located at the front of the heating chamber (2) and the air outlet (28) is located at the rear. The
The relationship between the height of the inlet (27) and the outlet (28) is that the outlet (28) is closer to the ceiling of the heating chamber (2) and higher than the inlet (27). (27) is in the range of the height position of 1/2 of the effective height of the heating chamber from the ceiling of the heating chamber (2).
In the embodiment, both the air inlet (27) and the air outlet (28) are aggregates of small holes, and the uppermost small hole of the air inlet (27) is a square plate mounting surface of the upper shelf rail (23). It is located at almost the same height as (23a).
The lowermost small hole of the exhaust port (28) is located higher than the upper shelf rail (23).

As shown in FIGS. 7 to 9, the steam generator (4) is a substantially square vertically-oriented flat shape in which an upper steam generation chamber (51) is formed in the upper stage and a lower steam generation chamber (51 a) is formed in the lower stage. The casing (41) and the heaters (42) (42a) located at the bottom of each steam generation chamber (51) (51a) are configured.
The casing (41) is composed of a main body (5) having one open side and a lid (6) that hermetically closes the opening of the main body (5). Both the main body (5) and the lid (6) are made of aluminum die-casting and have excellent thermal conductivity.
The main body (5) is provided with a horizontal partition wall (50) at the center in the height direction, and the interior is partitioned into two upper and lower steam generation chambers (51) and (51a). One end of the partition wall (50) is interrupted to form a vertical passage (59) that connects the upper and lower steam generation chambers (51) (51a). A weir (58) is provided upward at the interrupted end of the partition wall (50).

Steam jet nozzles (52) (52), (52a) (52a) are provided in a projecting manner in the horizontal and two outward positions at the highest position of the upper and lower steam generation chambers (51) (51a).
The upper steam generation chamber (51) is provided with a steam opening (51b) that communicates with each steam ejection nozzle (52), and the lower steam generation chamber (51a) includes steam that communicates with each steam ejection nozzle (52a). An opening (51c) is provided. The steam generated in each steam generation chamber (51) (51a) is transferred from each steam ejection nozzle (52) (52), (52a) (52a) through the steam opening (51b) (51c) to the heating chamber (2). It is ejected inside.
As shown in FIG. 9, the nozzle holes (57) and (57a) of the respective steam ejection nozzles (52) and (52a) are gradually narrowed with the ceiling surface being lowered toward the tip side. This is because the steam generated in the steam generation chambers (51) and (51a) is throttled to increase the flow velocity, and the steam is ejected obliquely downward.

In the steam generation chambers (51) and (51a), baffle plates (53) are provided below the steam openings (51b) and (51c) so as to approach the steam openings (51b) and (51c). The baffle plate (53) (53a) runs along the wall of the steam generation chamber (51) (51a) and the boiling water rushes up and is discharged from the steam ejection nozzles (52) (52a) (52) to the heating chamber (2). It plays a role to prevent being done. The upper surfaces of the baffle plates (53) and (53a) are inclined so that water droplets can be easily dropped. The baffle plates (53) and (53a) are formed in a mountain shape having two guide surfaces with different inclination directions. The top portions (55a) of the plates (53) and (53a) are positioned directly below the steam ejection nozzles (52) and (52a).
At the end of both baffle plates (53) (53), (53) and (53) below the horizontal baffle plates (53) and (53) and below the lower baffle plates (53a) and (53a) An auxiliary baffle plate (54) is provided so as to overlap, and an upward flow path of steam is formed between the baffle plates (53) and (53) and the auxiliary baffle plate (54).

The heaters (42) and (42a) are rod-shaped heaters, and are arranged in parallel in the horizontal direction through the upper part of the partition wall (50) and the bottom wall of the lower steam generation chamber (51a).
The distance between the upper and lower heaters (42) (42a) is substantially the same as the distance between the upper shelf rail (23) and the middle shelf rail (24) of the heating chamber (2).

  The lid (6) is provided with a water supply port (61) communicating with the upper steam generation chamber (51), and the water tank (61) is connected to the water tank via a water injection hose (61a) and a pump (61b). 19) is connected.

A sensor mounting hole (62a) with a bottom is formed in the lower outer surface of the lid (6), and the thermistor (63) is fitted into the sensor mounting hole (62a) and fixed with screws. The thermistor (63), the pump (61b) and the heaters (42) (42a) are connected to a control unit (8) which will be described later.
The controller (8) monitors the temperature of the bottom of the lower steam generation chamber (51a) detected by the thermistor (63), and when it reaches the steam ejection start temperature (for example, 90 ° C.), the water supply pump (61b ) Is driven to supply water to the upper steam generation chamber (51).
In the embodiment, the controller (8) cuts off the power to the heaters (42) and (42a) when the set upper limit temperature is reached, and stops the water supply pump (61b) when the set lower limit is reached. You may make it control to. Accordingly, it is possible to detect an abnormally high temperature in the steam generation chambers (51) and (51a) for safety and to prevent water from flowing into the heating chamber (2) without becoming steam.
Also, a sensor mounting hole (62) is provided in the upper part of the lid (6), so that a thermistor can be mounted preliminary.
In addition to the heaters (42) and (42a), the control unit (8) includes the display unit (11b), start button (11c), input key group (11a), open thermistor (8a), infrared sensor ( 12a), thermistor (63), magnetron (31), inverter circuit (33), flat heater (7), lower heater (71), and pump (61b) are connected.
In such a configuration, if the thermistor (63) is provided only in the upper steam generation chamber (51), the state of the water in the lower steam generation chamber (51a) cannot be grasped, and the heater of the lower steam generation chamber (51a) If (42a) breaks down, water accumulated in the lower steam generation chamber (51a) may flow into the heating chamber (2) from the steam ejection nozzle (52a). Therefore, the thermistor (63) is attached to the lower outer surface sensor attachment hole (62a) of the lid (6) so that at least the temperature of the lower steam generation chamber (51a) can be detected.

As shown in FIG. 9, the casing (41) of the steam generator (4) has upper and lower heaters (42) with the back surface of the casing body (5) facing the outer surface of the side wall (22) of the heating chamber (2). (42a) is fixed to the outer surface of the side wall (22) by screws or the like so as to correspond to the height positions of the upper shelf rail (23) and the middle shelf rail (24) of the heating chamber (2). As a result, the heaters (42) and (42a) face the recesses (23b and 23b) on the back surfaces of the shelf rails (23) and (24).
Through the four holes (22a) (22a), (22a) (22a) opened in the side wall (22), the steam ejection nozzles (52) (52), (52a) (52a) are heated to the heating chamber ( 2) I am presenting inside.
Between the steam ejection nozzles (52) (52a) and the holes (22a) (22a), a substantially cylindrical elastic seal member (9) is fitted. The hole edge of the side wall (22) is fitted in the circumferential groove (92) opened on the outer peripheral surface of the seal member (9), and the seal member (9) is located between the casing (41) and the side wall (22). It also serves as a spacer for forming a gap (90).

  However, when the cooking is used in a state where the square plate (26) is placed across the upper shelf rails (23) and (23) and the heating chamber (2) is divided vertically, the steam ejection nozzle (52) (52 ), (52a) and (52a) are located above and below the plate (26), so that both spaces sandwiching the plate (26) are filled with steam. Thereby, it is possible to apply a larger heating force to the food on the square dish (26) than before.

When using a cooker without using a square plate (26), it has the following effects.
An exhaust port (28) is located on the side wall (22) where the steam ejection nozzle (52) of the heating chamber (2) is located, an intake port (27) is located on the other side wall (21), and the heating chamber (2) The intake port (27) is located at the front and the exhaust port (28) is located at the rear.The relationship between the height of the intake port (27) and the exhaust port (28) is that the exhaust port (28) is located at the intake port (27). Since the intake port (27) is within the range of a half height position of the heating chamber (2) from the ceiling of the heating chamber (2), as shown in FIGS. Steam ejected from the ejection nozzle (52) is not discharged straight from the exhaust port (28). Further, the steam ejected from the steam ejection nozzle (52) tries to advance toward the opposite side wall of the heating chamber (2) while rising, but flows in from the intake port (27) located lower than the exhaust port (28). The steam, which is going to rise upward, is drawn downward by the air flow, and spreads widely in the heating chamber (2). For this reason, the waste from which the high-temperature steam is immediately exhausted can be eliminated.

Even if boiling water runs up the wall surface of the steam generation chamber (51) in the steam generation chamber (51) of the steam generation device (4), it is blocked by the baffle plate (53) on the way. For this reason, boiling water does not flow into the heating chamber (2) from the steam ejection nozzle (52), and the heating chamber (2) is not submerged.
Since the baffle plate (53) is inclined, even if condensed water adheres, the baffle plate (53) quickly reaches the inclined end along the inclination and drops. For this reason, water does not collect on the baffle plate (53), and adhesion and accumulation of scale can be prevented as much as possible.
Since the baffle plate (53) of the embodiment is formed in a mountain shape having two guide surfaces with different inclination directions, even if boiling water runs up straight from below the baffle plate (53), It is guided downward along one of the slopes and drops from the bottom of the slope.
The auxiliary baffle plate (54) provided between the two baffle plates (53), (53), (53a) and (53a) arranged side by side makes the boiling water straight upward between the baffle plates (53) and (53). You can also prevent climbing up.

  When the temperature in the vicinity of the lower steam generation chamber (51a) reaches the set upper limit temperature by the thermistor (63), the steam generator (4) has a heater (42) (42a) in each steam generation chamber (51) (51a). When the set lower limit is reached, the water supply pump is controlled to stop, so the steam generation chamber (51) (51a) is heated empty, or water does not turn into steam. Can be reliably prevented from flowing into the heating chamber (2).

Since a heat insulation layer of air is formed in the gap (90) between the casing (41) of the steam generator (4) and the side wall (22) of the heating chamber (2), the heat of the casing (41) It can be prevented that the ability to generate steam is reduced due to being taken away by the side wall (22).
In the embodiment, the rod heater (42) of the steam generator (4) is opposed to the recess (23b) corresponding to the shelf rail (23) of the heating chamber side wall (22), and the recess (23b). Therefore, it is possible to more effectively prevent heat from being removed from the casing (41) unnecessarily by increasing the cross-sectional width of the air heat insulation layer at the portion corresponding to the heater (42).

Since the steam ejection nozzles (52) and (52a) of the steam generator (4) eject the steam obliquely downward, the lower part of the heating chamber (2) is quickly filled with steam, and the bottom of the heating chamber (2) Even when food is placed on the food, the food can be heated effectively.
Moreover, the time until the steam rises and is discharged from the exhaust port (28) can be increased, and the residence time can be increased in the heating chamber (2) of the high-temperature steam, so that the heating effect on the food can be enhanced.
Moreover, since the nozzle hole (57) of the steam jet nozzle (52) is narrowed toward the tip side, the steam flow speed is increased and the jet direction of the steam flow is determined, so that the steam flow is directly applied to the food. It is preferable when better.

  Since the cooking device of the embodiment has a microwave heating cooking function and a heater heating cooking function in addition to the above heating function, each cooking function is used alone, or two or three types of heating functions are used in combination. Of course you can cook.

As an example, a description will be given of selecting and cooking bird teriyaki in heater heating cooking (grill cooking) that cooks while scorching based on the flowchart shown in FIG.
Store the square plate (26) with food in the heating chamber (2), close the door (20), and perform the following operations.
The following steps show the operation steps of the control unit (8).
Sl: Set the steam cooking menu (select the grilled chicken teriyaki menu).
S2: It is determined whether or not the start button (11c) on the operation panel (11) has been operated.
S3: Energize the heaters (42) and (42a) of the steam generator (4).
S4: Energize the flat heater (7) in the heating chamber (2).
S5: The temperature is detected by the thermistor (63) of the steam generator (4).
S6: It is determined whether or not the temperature capable of ejecting steam has been reached (80 ° C. to 90 ° C.).
S7: The pump (61a) is driven to supply water from the water tank (19) to the steam generation chamber (51) of the steam generator (4), and steam generation is started.
S8: It is determined whether the cooking time has elapsed and the cooking end timing is reached.
S9: The heaters (42), (42a) and the flat heater (7) are de-energized, and the pump (61a) is stopped.
SlO: Notifying the user of the end of cooking by a notifying means such as a buzzer (not shown). In addition to the main cooking, various heating methods such as microwave heating by driving the magnetron (31) while the steam from the steam generator (4) is filled in the heating chamber (2) are applied. During microwave heating, the square dish (26) is not used, and the food is directly placed on the bottom plate (29) and microwave heating is performed.
In addition, since the power consumption of the flat heater (7) is large, there is a possibility that the household power breaker may be cut off when driven simultaneously with the heaters (42), (42a) of the steam generator (4). You may do it.

  The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. In addition, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.

It is a perspective view of a heating cooker. It is the perspective view which looked at the heating cooker which opened the door from diagonally left forward. It is sectional drawing which shows the inside of a heating cooker. It is the perspective view seen from the right front of a heating cooker. It is explanatory drawing which shows the flow of the vapor | steam in a heating chamber, and the flow of air seen from the front. It is explanatory drawing which shows the flow of the vapor | steam and air in a heating chamber seen from the top. It is a disassembled perspective view of the casing of a steam generator. It is a front view of a casing main body. It is sectional drawing of the attachment state of the casing of a steam generator. It is a block diagram of a control part. It is a flowchart of a cooking procedure.

Explanation of symbols

1 Heating cooker body 2 Heating chamber
21 Side wall
22 Side wall
23 Shelf rail
27 Air intake
28 Exhaust port 4 Steam generator
41 casing
42 Heater
51 Steam generation chamber
52 Steam jet nozzle
53 Upper baffle

Claims (11)

  In a cooking device for cooking food in the heating chamber (2), the square plates (26) are accommodated in the heating chamber (2) on the opposite side walls (21) and (22) of the heating chamber (2). Shelf rails (23) and (23) for mounting are sometimes provided, and one side wall (22) is provided with steam ejection nozzles (52) and (52a) at the upper and lower positions across the shelf rail (23). The cooking device is provided with a steam generator (4) that ejects steam from the steam ejection nozzles (52) and (52a) outside the heating chamber (2).   In the cooking device for cooking food in the heating chamber (2), the steam ejection nozzle (52) is located on one side wall (22) of the opposite side walls (21) and (22) of the heating chamber (2), A steam generator (4) for ejecting steam from the steam ejection nozzle (55) is provided outside the heating chamber (2), and is provided on the side wall (22) where the steam ejection nozzle (52) of the heating chamber (2) is located. The exhaust port (28) is provided, the other side wall (21) is provided with an intake port (27), and the intake port (27) and the exhaust port (28) are arranged in the longitudinal direction of the heating chamber (22) side wall. A heating cooker in which the exhaust ports (28) are provided at positions higher than the intake ports (27) in positions opposite to each other.   In the heating cooker for cooking food in the heating chamber (2), a steam generator (4) is provided outside the heating chamber (2), and the steam generator (4) is provided inside the steam generator (51). ) And a steam ejection nozzle (52) which communicates with a steam opening provided in the steam generation chamber (51) and can eject steam generated in the steam generation chamber (51) into the heating chamber (2). ), A heater (42) that heats water in the steam generation chamber (51), and water that has boiled in the steam generation chamber (51) enters the heating chamber (2) from the steam ejection nozzle (52). A cooking device comprising a baffle plate (53) provided below the steam opening in the steam generation chamber (51) and inclined so that the upper surface can easily drop water drops to prevent it. A water tank (19) for storing water, a pump (61b) for supplying water from the water tank (19) to the steam generator (4) via a conduit (61a), and a heater for the steam generator (4) And a controller (8) for controlling the operation of the pump (61b),
The steam generation chamber of the steam generator (4) has an upper steam generation chamber (51) arranged in the upper stage and a lower steam generation chamber (51a) arranged in the lower stage,
The heater of the steam generator (4) has a heater (42) for heating water in the upper steam generation chamber (51) and a heater (42a) for heating water in the lower steam generation chamber (51a),
The steam jet nozzle (52) of the steam generator (4) is disposed in the heating chamber (2) above the shelf rail (23) for placing the square dish (26), and the upper steam generating chamber (51). A steam ejection nozzle (52) communicating with the steam rail, and a steam ejection nozzle (52a) disposed at a position below the shelf rail (23) and communicating with the lower steam generation chamber (51a),
The upper steam generation chamber (51) is provided at a position lower than the water supply port (61) to which the pipe (61a) connected to the pump (61b) is connected and the steam opening to the steam ejection nozzle (52). And a passage (59) for flowing water overflowing the weir (58) to the lower steam generation chamber (51a),
The lower steam generation chamber (51a) has a thermistor that detects the temperature of the steam generation device (4).
The controller (8) energizes the heaters (42) and (42a) to heat the steam generator (4), and drives the pump (61b) when the temperature detected by the thermistor (63) reaches the steam ejection start temperature. The heating cooker according to claim 3, wherein water in the water tank (19) is supplied from the water supply port (61) into the upper steam generation chamber (51).   Both side walls (21) and (22) of the heating chamber (2) are formed of metal plates, and the shelf rail (23) is formed by inflating the metal plate into the heating chamber (2) side by pressing. The heater (42) of the steam generator (4) is a rod-shaped heater that faces the recess (23b) corresponding to the shelf rail (23) of the heating chamber side wall (22) and extends along the recess (23b). The cooker according to claim 4, wherein the cooker is deployed.   The casing (41) of the steam generator (4) is provided with a gap (90) between the outer surface of the side wall (22) of the heating chamber (2), and is insulated by the air layer generated by the gap (90). The heating cooker according to any one of claims 1 to 5, wherein:   The steam cooker according to any one of claims 1 to 6, wherein the steam ejection nozzle (52) (52a) is formed so that steam is ejected obliquely downward.   The cooking device according to any one of claims 1 to 7, wherein the nozzle holes (57) and (57a) of the steam ejection nozzles (52) and (52a) are narrowed toward the tip side.   In the steam generator (4) for a heating cooker that cooks food in the heating chamber (2), the steam generating chamber (51) has a steam opening (51b) communicating with the steam ejection nozzle (52) in the upper part and a lower part. A heater (42) is provided in the vicinity of the water, and water boiled in the steam generation chamber (51) enters the heating chamber (2) from the steam ejection nozzle (52) below the steam opening (51b). A steam generator for a heating cooker, provided with a baffle plate (53) for preventing this, and the upper surface of the baffle plate is inclined so that water drops can be easily dropped.   A plurality of ejection nozzles (52) (52) are provided side by side, and baffle plates (53) (53) are provided corresponding to the respective ejection nozzles (52) (52), and adjacent baffle plates (53) (53) ( 53), an auxiliary baffle plate (54) is provided so as to overlap the ends of both baffle plates (53) and (53), and the baffle plates (53) (53) and the auxiliary baffle plates (54 The steam generator for a heating cooker according to claim 9, wherein a steam flow path is formed between the steam generator and the steam cooker.   The steam generator for a heating cooker according to claim 9 or 10, wherein an upper surface of the baffle plate (53) (53a) is formed in a mountain shape having two guide surfaces having different inclination directions.

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