JP7297561B2 - heating cooker - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heating cooker such as a steam convection oven that heats and cooks foodstuffs with hot air.

The following Patent Document 1 discloses a heating cooker that heats and cooks food with hot air, and this heating cooker has a hot air generation chamber that generates hot air on the left side, and a food that stores the food in the remaining part. The storage chamber consists of a cooking chamber that heats and cooks the ingredients in the food storage chamber with hot air sent out from the hot air generation chamber, and a suction that draws in air from the food storage chamber to the hot air generation chamber with a large number of openings arranged in a circle in the center. A partition plate that has a mouth and has a ventilation path for sending hot air generated in the hot air generation chamber on the upper and lower sides, and partitions the hot air generation chamber and the food material storage chamber so that ventilation is possible, and is provided in the hot air generation chamber, A convection fan for convecting the air in the cooking chamber by blowing out the air in the food storage chamber sucked from the suction port in a centrifugal direction and sending it out through the ventilation passage to the food storage chamber, and the convection fan provided in the hot air generation chamber. It is provided with a heater for heating air to be sent out, and a pair of left and right support frames for vertically supporting a plurality of trays containing food in the food storage chamber in a multistage manner.

When cooking foodstuffs with this heating cooker, the trays containing the foodstuffs are vertically supported by the support frame in a multistage manner in the cooking chamber, and the operation panel is operated to execute the cooking program. When the cooking program is executed, the air in the food storage chamber is sucked into the hot air generating chamber through the suction port by the convection fan, and the sucked air is blown outward in the centrifugal direction and heated by the outside heater to become hot air. , the hot air is sent to the food storage chamber again from the air passage. A convection fan and a heater operate to cause hot air to circulate in the cooking chamber, and the ingredients placed in the tray in the cooking chamber are heated and cooked by the convection hot air.

JP 2017-053544 A

In the heating cooker described in Patent Document 1 described above, the foodstuffs on the trays stored in a multi-tiered manner in the cooking chamber are heated and cooked by hot air circulating between the foodstuff storage chamber and the hot air blowing chamber. Since the intake port of the partition plate has the highest percentage of openings at the center in the vertical direction, a large amount of convection hot air passes through the height of the center in the vertical direction in the food storage chamber, and the height of the center in the vertical direction in the food storage chamber is large. A lot of heat is applied to the foodstuffs on the trays. In addition, since a ventilation passage is formed between the upper and lower ends of the partition plate and the ceiling wall and the bottom wall of the cooking chamber, the hot air sent out from the hot air generation chamber passes through the upper and lower parts of the food storage chamber, so that the food can be A lot of food materials on the trays placed at the top and bottom of the storage chamber are also heated. In this manner, a large amount of heat is applied to the foodstuffs in the trays accommodated in the vertical central portion and the upper and lower portions of the foodstuff storage chamber.

On the other hand, the amount of hot air that convects in the cooking chamber between the center and the top in the vertical direction and between the center and the bottom in the vertical direction is smaller than that in the center and the top and bottom. For this reason, the foodstuffs on the trays arranged between the central portion and the upper portion and the foodstuffs on the trays arranged between the central portion and the lower portion are different from the foodstuffs on the trays arranged between the central portion and the upper and lower portions. The amount of heat to be applied is small, and there is a risk of so-called uneven baking, in which the degree of heating differs due to differences in the height positions at which the foodstuffs are accommodated on each tray accommodated vertically in a multi-tiered manner in the cooking chamber. An object of the present invention is to prevent the occurrence of so-called uneven baking, which is a phenomenon in which the degree of heating differs due to the difference in the height positions at which the foodstuffs are accommodated on each tray accommodated in a multi-tiered manner in the upper and lower sides of the cooking chamber. do.

In order to solve the above-mentioned problems, the present invention has one side portion as a hot air generation chamber for generating hot air, and the remaining portion including the other side portion as a food storage chamber for storing food, which is sent out from the hot air generation chamber. It has a cooking chamber that heats and cooks the food in the food storage chamber with hot air, and a circular suction port in the center that sucks air from the food storage chamber to the hot air generation chamber, and at least the upper and lower sides are the hot air generated in the hot air generation chamber. A partition plate for partitioning the hot air generating chamber and the food material storage chamber so as to allow air flow, and a partition plate provided in the hot air generating chamber for blowing outward in the centrifugal direction the air in the food material storage chamber sucked from the suction port. A convection fan that convects the air in the cooking chamber by sending it out from the ventilation passage to the food storage chamber, a heater that is provided in the hot air generation chamber and heats the air sent out by the convection fan, and a food material in the food storage chamber. and a pair of left and right support frames for supporting a plurality of trays vertically in multiple stages, wherein the partition plate has height positions above and below the central portion of the suction port in the vertical direction. (1) is formed with an auxiliary opening for sucking the air in the foodstuff storage chamber into the hot air generation chamber .

In the heating cooker configured as described above, since the ratio of the opening of the suction port of the partition plate is lower in the upper and lower sides than the center in the vertical direction, It is difficult for hot air to pass through the upper and lower sides than in the central part, but the partition plate is positioned above and below the central part in the vertical direction of the suction port to allow the air in the food storage chamber to flow into the hot air generating chamber. Formed an auxiliary opening for sucking into . As a result, the hot air passes through not only the suction port but also the auxiliary opening above and below the central part of the upper and lower parts of the food material storage chamber, and the hot air passes through the upper and lower parts of the food material storage room in the vertical direction. The food on the placed tray is heated to the same degree as the central part in the vertical direction, and the food on the tray in the food storage chamber is less likely to be heated unevenly in the upper and lower storage positions. .

In the heating cooker configured as described above, it is preferable to use a plurality of elongated holes extending in the horizontal direction as the auxiliary openings. When this is done, the number of holes can be reduced compared to when round holes are used as the auxiliary openings, so that the auxiliary openings can be easily machined. When a plurality of long holes forming the auxiliary opening are arranged in the horizontal direction and the vertical direction, it is preferable that the distance between the plurality of long holes in the horizontal direction and the vertical direction is equal to or greater than the width of the long holes. When this is done, the strength can be maintained even when the auxiliary opening is formed in the partition plate.

It is a front view of one embodiment of the heating cooker of the present invention. FIG. 2 is a front view in which the door of FIG. 1 is opened; It is a vertical cross-sectional view at the central portion in the front-rear direction. It is an AA sectional view. FIG. 4 is a cross-sectional view taken along line AA when the support frame is removed; FIG. 4 is a cross-sectional view taken along line AA when the partition plate and the support frame are removed; It is the left side view which removed the left panel of the housing and made it possible to see the machine room. Fig. 3 is a perspective view showing a water supply pipe of a humidifying nozzle arranged on the upper surface of the ceiling wall of the cooking chamber; It is a block diagram of a control device.

An embodiment of the heating cooker of the present invention will be described below with reference to the accompanying drawings. The heating cooker of the present invention is called a steam convection oven, and heats and cooks foodstuffs by convection of hot air containing steam. As shown in FIG. 1, the heating cooker 10 has a machine room 12 on the left side of the housing 11 and a cooking chamber 20 for cooking foodstuffs in a portion of the housing 11 excluding the machine room 12. I have it. As shown in FIG. 2, an opening 20a for taking in and out foodstuffs is provided in the front part of the cooking chamber 20, and a door 13 for opening and closing the opening 20a is provided.

As shown in FIGS. 2 and 3, the cooking chamber 20 is for storing and cooking foodstuffs. A hot air generating chamber 22 for generating hot air to be sent to the food storage chamber 21 is provided on the left side of the cabinet 20 . As shown in FIGS. 3 to 5, a partition plate 23 for partitioning the food storage chamber 21 and the hot air generation chamber 22 is provided on the left side of the central portion of the cooking chamber 20 in the horizontal direction. A heater 25 for generating hot air in the hot air generating chamber 22 and a convection fan 26 are provided on the left side inside the cooking chamber 20 .

As shown in FIGS. 4 and 5, a suction port 23a is provided in the vertical central portion of the partition plate 23. The suction port 23a has a circular shape as a whole with a large number of openings 23a4. are doing. The suction port 23a is formed at a position facing the convection fan 26 in the hot air generation chamber 22, and is used to suck the air in the food material storage chamber 21 into the hot air generation chamber 22 when the convection fan 26 is operated. It has the function of passage. The suction port 23a of this embodiment includes a circular opening 23a1, a metallic spiral wire rod 23a2, and four linear wires 23a3 arranged radially, and is partitioned by the spiral wire rod 23a2 and the linear wire rod 23a3. A large number of arcuate openings 23a4 are arranged in a circle. In addition, the suction port 23a is not limited to one in which the circular opening 23a4 is arranged in a circle by attaching the spiral wire rod 23a2 and the linear wire rod 23a3 to the circular opening 23a1. A circular arrangement of openings made of holes or rectangular holes may also be used. In addition, the partition plate 23 is attached to the cooking chamber 20 so that a ventilation passage 23b is formed between the ceiling wall, the bottom wall, the front wall, and the rear wall of the cooking chamber 20, and the ventilation passage 23b is formed by a convection fan 26. has a function of a passage for sending the air in the hot air generating chamber 22 to the food material accommodating chamber 21 when the is operated.

As shown in FIG. 5, the suction port 23a of the partition plate 23 has a large number of openings 23a4 arranged in a circle to form a circular shape as a whole. It is high, and the ratio of the opening gradually decreases as it progresses upward and downward from the central portion. For this reason, the amount of air passing through the suction port 23a from the food storage chamber 21 increases at the center in the vertical direction, and gradually decreases as it progresses upward and downward from the center. Auxiliary openings 23c are formed above and below the central portion in the vertical direction of the partition plate 23, and the auxiliary openings 23c are located above and below the central portion in the vertical direction where the opening ratio of the suction port 23a is low. are placed in Further, the auxiliary opening 23c is formed on the same plane as the suction port 23a, and is formed within the vertical range of the suction port 23a. As described above, the amount of air passing through the suction port 23a increases at the center in the vertical direction, and gradually decreases as it progresses upward and downward from the center. Since it is formed above and below the central portion in the vertical direction where the opening ratio of 23a is low, the air from inside the food storage chamber 21 passing through the suction port 23a and the auxiliary opening 23c is in a state where there is little variation in the vertical direction. It is sucked into the hot air generation chamber 22 .

As shown in FIGS. 2 to 4, the foodstuff storage chamber 21 of the cooking chamber 20 is provided with a pair of left and right support frames 24 for supporting trays called hotel pans vertically in multiple stages. The support frame 24 of this embodiment supports the trays in six stages vertically. In FIGS. 4 and 5, the height positions of the trays supported by the support frame 24 are indicated by T1 to T6 in order from the top. . The support frames 24 are made of a bent metal wire (metal wire material), and each support frame 24 is fixed to a pair of front and rear posts 24a, and is fixed to the front and rear posts 24a to support the left and right edges of the tray. and a rail 24b for supporting the

As shown in FIGS. 3 and 6, a heater 25 and a convection fan 26 are provided on the left side of the cooking chamber 20 . A heater 25 heats the cooking chamber 20 and a convection fan 26 convects the air in the cooking chamber 20 . The heater 25 is annularly formed on the left side wall of the cooking chamber 20 . A convection fan 26 is arranged inside the annularly formed heater 25 . The convection fan 26 employs a centrifugal fan and is attached to the left side wall of the cooking chamber 20 so as to rotate around a rotation shaft extending in the left-right direction. When the heater 25 and the convection fan 26 are operated, the air in the food storage chamber 21 is sent to the hot air generation chamber 22 through the suction port 23a and the auxiliary opening 23c, and the air blown outward in the centrifugal direction from the convection fan 26. is heated by the heater 25 in the hot air generating chamber 22 to become hot air, and the heated hot air is sent to the food material storage chamber 21 through the ventilation passage 23b between the partition plate 23 and each wall of the cooking chamber 20. As shown in FIG. 6 , a temperature sensor 27 is provided on the left side wall of the cooking chamber 20 and the temperature sensor 27 detects the temperature inside the cooking chamber 20 .

As shown in FIG. 7, the machine room 12 of the housing 11 is provided with a steam generator 30 for supplying steam into the cooking chamber 20 . The steam generator 30 heats water by induction heating to generate steam, and is erected above the drainage tank 14 for draining the drainage from the cooking chamber 20 . The steam generating device 30 includes a cylindrical steam generating container 31 storing water at a predetermined level, a heating element (not shown) for heating the water in the steam generating container 31, and a heater wound around the outer periphery of the steam generating container 31. It is equipped with an induction heating coil 32 that heats the heating element and a steam delivery cylinder 33 that delivers the steam generated in the steam generation container 31 to the cooking chamber 20 . The steam delivery cylinder 33 is connected to the steam introduction port 20b of the cooking chamber 20 shown in FIG. sent to

As shown in FIG. 3, a humidifying nozzle 34 is provided on the ceiling wall of the cooking chamber 20, and the humidifying nozzle 34 temporarily humidifies the interior of the cooking chamber 20 by manual operation. The humidifying nozzle 34 has a cylindrical shape protruding downward from the ceiling wall of the hot air generating chamber 22 of the cooking chamber 20 and is arranged on the left side of the partition plate 23 . As shown in FIG. 7, the humidifying nozzle 34 is connected to a water supply pipe 35 that supplies water from a water supply source such as a tap, and a water supply valve 36 is interposed in the water supply pipe 35 . As shown in FIG. 8 , part of the water supply pipe 35 is arranged along the upper surface of the ceiling wall of the cooking chamber 20 , and the water sent from the water supply pipe 35 to the humidification nozzle 34 flows through the ceiling wall of the cooking chamber 20 . heated as it passes over the top of the

An injection port is formed at the tip of the humidifying nozzle 34 , and the injection port opens toward the partition plate 23 . The water jetted from the jetting port of the humidifying nozzle 34 first hits the partition plate 23, and the water flowing down the partition plate 23 is sucked by the convection fan 26 and blown outward in the centrifugal direction, and the blown water is transferred to the outer heater. 25 is heated to become steam. The humidifying nozzle 34 is provided on the ceiling wall and jets water obliquely downward toward the partition plate 23, so that water can be stably jetted without being affected by water pressure. Moreover, since the water is jetted toward the partition plate 23, the food on the tray accommodated in the food storage chamber 21 can be prevented from being splashed with water. Moreover, since the water is not directly jetted to the heater 25, but is jetted toward the partition plate 23, it is possible to prevent the heater 25 from undergoing a rapid temperature change due to the water for humidification.

As shown in FIG. 9, the heating cooker 10 includes a controller 40, which is connected to the heater 25, the convection fan 26, the temperature sensor 27, the steam generator 30, and the water supply valve 36. . The control device 40 has a microcomputer (not shown), and the microcomputer has a CPU, a RAM, a ROM and a timer (all not shown) connected via a bus.

The control device 40 has a cooking program for cooking food in the cooking chamber 20 in its ROM. The cooking program consists of a hot air mode cooking program in which the heater 25 and the convection fan 26 are operated to heat and cook the ingredients with convection hot air, and a convection fan 26 and the steam generator 30 are operated to operate the convection hot air containing steam. There are three types of cooking programs: a steam mode cooking program for heating and cooking foodstuffs, and a combination mode cooking program for heating and cooking foodstuffs with high-temperature hot air containing steam that actuates the heater 25, the convection fan 26, and the steam generator 30 to convect. It has a cooking program. The ROM stores a cooking program in which the set temperature, steam amount, and cooking time in the cooking chamber 20 are set in advance. It is configurable.

When the hot air mode cooking program of the cooking program is executed, the heater 25 and the convection fan 26 operate to suck the air in the food material storage chamber 21 into the hot air generation chamber 22 through the suction port 23a and the auxiliary opening 23c. , the sucked air is blown outward in the centrifugal direction from the convection fan 26, the air blown out in the centrifugal direction is heated when passing around the heater 25, and the heated air becomes hot air for ventilation. It is sent to the food storage chamber 21 through the path 23b. The air in the cooking chamber 20 is heated by the heater 25 in the process of circulating through the food storage chamber 21 and the hot air generating chamber 22 by the convection fan 26, becomes hot air, convects the cooking chamber 20, and is stored in the cooking chamber 20. Ingredients are heated and cooked by convection hot air.

Also, when the combination mode cooking program of the cooking program is executed, the air in the cooking chamber 20 is circulated between the food storage chamber 21 and the hot air generation chamber 22 by the convection fan 26, as when the hot air mode cooking program is executed. In the process of cooking, it is heated by the heater 25 and turns into hot air to cause convection in the cooking chamber 20, and the steam is supplied from the steam generator 30 into the cooking chamber 20, so that the ingredients stored in the cooking chamber 20 convect. It is cooked by hot air containing steam.

The heating cooker 10 configured as described above has one side as a hot air generation chamber 22 for generating hot air, and the remaining portion including the other side as a food storage chamber 21 for storing food. and a cooking chamber 20 for heating and cooking the foodstuffs in the foodstuff storage chamber 21 by hot air sent out from. In addition, the heating cooker 10 has a suction port 23a in which a large number of openings 23a4 are arranged in a circular shape in the central portion to suck air from the food storage chamber 21 into the hot air generating chamber 22, and the hot air generating chambers on the upper and lower and front and back sides. A partition plate 23 having a ventilation path 23b for sending out the hot air generated in 22 and partitioning the hot air generating chamber 22 and the food material storage chamber 21 in a ventilable manner, and the food material sucked into the hot air generating room 22 from the suction port 23a. A convection fan 26 for blowing air in the storage chamber 21 outward in the centrifugal direction and sending it out to the food storage chamber 21 through the air passage 23b, a heater 25 for heating the air sent out by the convection fan 26 in the hot air generation chamber 22, and food. A pair of left and right support frames 24 are provided for supporting trays containing foodstuffs in the housing chamber 21 in six stages (in a multistage manner).

Since the suction port 23a of the partition plate 23 is formed in a circular shape, the rate of opening is highest at the central portion in the vertical direction, and the rate of opening is low at the upper and lower sides of the central portion. The amount of hot air (air) flowing into the hot-air generating chamber 22 from the food material storage chamber 21 through the suction port 23a is large at the center in the vertical direction, and is small above and below the center. The hot air flowing into the suction port 23a passes most around the trays T3 and T4 on the third and fourth stages, which are accommodated at the same height as the vertical central portion of the suction port 23a. Around the second and fifth trays T2 and T5, less hot air flows into the suction port 23a than the third and fourth trays T3 and T4.

In this heating cooker 10, the partition plate 23 has a circular suction port 23a which has a larger opening than the center in the vertical direction in order to make it difficult to cause so-called uneven cooking, that is, the degree of heating varies depending on the height position of the tray. Auxiliary openings 23c are formed at the upper and lower height positions where the ratio is low. As described above, hot air passing through the suction port 23a increases around the third and fourth trays T3 and T4, which are accommodated at the same height as the vertical central portion of the suction port 23a. Not only the hot air passing through the suction port 23a but also the hot air passing through the auxiliary opening 23c pass through the second and fifth trays T2 and T5 above and below. As a result, the foodstuffs on the trays T2 and T5 arranged above and below the center in the vertical direction of the food storage chamber 21 are heated to the same extent as the foodstuffs on the trays T3 and T4 in the center in the vertical direction. In addition, the foodstuffs on the tray in the foodstuff storage chamber 21 are less likely to be heated differently depending on the upper and lower storage positions, that is, so-called uneven baking. Hot air sent from the hot-air generating chamber 22 through the upper and lower air passages 23b passes around the trays T1 and T6 on the uppermost and lowermost first and sixth stages. The trays T1 and T6 are heated to the same extent as the trays T3 and T4 in the center in the vertical direction.

Further, since the auxiliary opening 23c uses a plurality of elongated holes extending in the horizontal direction, the number of holes can be reduced compared to when round holes are used for the auxiliary opening 23c. was able to facilitate In addition, a plurality of long holes forming the auxiliary opening 23c are arranged in the horizontal direction and the vertical direction, and the distance between the plurality of long holes in the horizontal direction and the vertical direction is equal to or longer than the width of the long hole. As a result, the strength can be maintained even when the partition plate 23 is formed with the auxiliary opening 23c.

In the heating cooker 10 of the above-described embodiment, the left side as one side of the cooking chamber 20 serves as the hot air generation chamber 22 for generating hot air, and the remaining portion including the right side as the other side accommodates foodstuffs. Although the food storage chamber 21 is used, the present invention is not limited to this. The remaining portion including the left side portion or the front side portion may be used as the foodstuff storage chamber 21 for storing foodstuffs.

In the heating cooker 10 of the above embodiment, the ventilation passage 23b is formed between the partition plate 23 and the ceiling wall, bottom wall, front wall and rear wall of the cooking chamber 20, but the present invention is directed to this. The ventilation path 23b is not limited, and may be formed between the partition plate 23 and at least the ceiling wall and the bottom wall of the cooking chamber 20 .

DESCRIPTION OF SYMBOLS 10... Heating cooker, 20... Cooking chamber, 21... Food material storage chamber, 22... Hot air generation chamber, 23... Partition plate, 23a... Suction port, 23b... Ventilation path, 23c... Auxiliary opening, 24... Support frame, 25 ... heater, 26 ... convection fan.

Claims (3)

One side portion is used as a hot air generation chamber for generating hot air, and the remaining portion including the other side portion is used as a food material storage chamber for storing foodstuffs. a kitchen and
The hot air generating chamber has a circular suction port in the center for sucking air from the food material storage chamber to the hot air generating chamber, and at least upper and lower ventilation paths for sending out the hot air generated in the hot air generating chamber. and a partition plate that partitions the food storage chamber so that ventilation is possible,
A convection provided in the hot air generating chamber for blowing air in the food material storage chamber sucked from the suction port in a centrifugal direction outward and sending the air into the food material storage chamber through the ventilation passage to cause convection of the air in the cooking chamber. with a fan
a heater provided in the hot air generation chamber for heating the air sent out by the convection fan;
A heating cooker comprising a pair of left and right support frames for vertically supporting a plurality of trays containing food in the food storage chamber,
Auxiliary openings are formed in the partition plate at height positions above and below a central portion of the suction port in the vertical direction for sucking the air in the food material storage chamber into the hot air generation chamber. Heating cooker. In the heating cooker according to claim 1,
A heating cooker, wherein the auxiliary opening uses a plurality of elongated holes extending in a horizontal direction. In the heating cooker according to claim 2,
A plurality of elongated holes forming the auxiliary opening are arranged in the horizontal direction and the vertical direction, and the intervals between the plurality of elongated holes in the horizontal direction and the vertical direction are equal to or larger than the width of the elongated holes. A heating cooker characterized by:

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