JP2012241942A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker which can efficiently use a steam generation heater as a heat source, in the heating cooker using both the steam generation heater and a heating heater to perform heating cooking.SOLUTION: The heating cooker includes a steam generation device 20 having the steam generation heater 21 for heating water to generate steam, a heating chamber receiving the steam from the steam generation device 20, an upper heater 14 and a lower heater 17 for heating an object to be heated in the heating chamber, and a control device 100. The control device 100 includes a heating heater control means 100a for controlling the upper heater 14 and the lower heater 17 so as to raise a temperature in the heating chamber up to a target temperature, and a steam generation heater control means 100b for controlling the steam generation heater 21 so as not to turn on the steam generation heater 21 when the upper heater 14 and the lower heater 17 are turned on, and so as to turn on the steam generation heater 21 when the upper heater 14 and the lower heater 17 are turned off.

Description

  The present invention relates to a cooking device.

  Conventionally, as a heating cooker, steam generating means having a steam generating heater that generates steam by heating water, a heating chamber to which steam from the steam generating means is supplied, and an object to be heated in the heating chamber are heated. Some include a heater (see, for example, Japanese Patent Application Laid-Open No. 2007-327664 (Patent Document 1)).

  In the heating cooker, the total power consumption of the steam generating heater and the heater may exceed the maximum allowable power of the power source. In such a cooking device, the steam generating heater and the heater are not turned on at the same time so as not to exceed the maximum allowable power of the power source.

  In the cooking device having the above configuration, in the cooking using both the steam from the steam generating means and the heating by the heater, the steam generating heater and the heater are in a transition period until the temperature in the heating chamber reaches the target temperature. Are alternately turned on, so that both the steam generating heater and the heater are not simultaneously turned off.

  However, in the heating cooker, after the temperature in the heating chamber reaches the target temperature, the heater heater is turned on and off so as to maintain the temperature in the heating chamber at the target temperature. There is a case where both the steam generating heater and the heater are turned off at the same time, and the heat source cannot be effectively used for cooking.

JP 2007-327664 A

  Then, the subject of this invention is providing the heating cooker which can use a steam generation heater effectively as a heat source in the heating cooker which cooks using both a steam generation heater and a heating heater.

In order to solve the above problems, the heating cooker of the present invention is:
Steam generating means having a steam generating heater for heating water to generate steam;
A heating chamber to which steam from the steam generating means is supplied;
A heater for heating an object to be heated in the heating chamber;
In a heating cooking operation using both the steam from the steam generating means and the heater, a heater control means for controlling the heater so that the temperature in the heating chamber becomes a target temperature;
In the cooking operation using both the steam from the steam generating means and the heater, the steam generating heater is not turned on when the heater is turned on, and the steam generating heater is always turned on when the heater is turned off. The steam generation heater control means for controlling the steam generation heater so as to be turned on is provided.

  According to the above configuration, in the heating cooking operation using both the steam from the steam generating heater and the heater, the heater control means controls the heater so that the temperature in the heating chamber becomes the target temperature. The steam generating heater control means generates steam so that the object to be heated in the heating chamber is heated, the steam generating heater is not turned on when the heater is turned on, and the steam generating heater is always turned on when the heater is turned off. Steam is supplied into the heating chamber by controlling the heater. Accordingly, in the cooking device that performs cooking using both the steam generating heater and the heater, the steam generating heater can be effectively used as a heat source. Therefore, the cooking time can be shortened, and by supplying a large amount of steam into the heating chamber, the cooking object can be cooked with good finish without any spots.

Moreover, in the heating cooker of one embodiment,
In a cooking operation using both the steam from the steam generating means and the heater, a first period in which the heater can be turned on by the heater control means, and the steam generating heater by the steam generator heater control means The steam generating heater is turned on by the steam generating heater control means when the heater is in the OFF state in the first period.

  According to the embodiment, in the cooking operation using both the steam from the steam generating means and the heater, the first period in which the heater can be turned on by the heater control means, and the steam generation by the steam generating heater control means. While alternately repeating the second period in which the heater can be turned on, the heater is turned on and off by the heater control means so that the temperature in the heating chamber becomes the target temperature in the first period in which the heater can be turned on. In a second period during which the generation heater can be turned on, the steam generation heater is turned on by the steam generation heater control means. Further, in the first period in which the heater can be turned on, the steam generating heater is turned on by the steam generating heater control means when the heater is in an off state. Therefore, the steam generating heater is effectively used as a heat source without disturbing the basic control flow of the heating and cooking operation in which the first period in which the heater can be turned on and the second period in which the steam generator heater can be turned on alternately. It can be used and the cooking operation can be easily controlled.

Moreover, in the heating cooker of one embodiment,
A water supply means for supplying water to the steam generating means when the steam generating heater is turned on by the steam generating heater control means is provided.

  According to the above embodiment, when the steam generating heater is turned on by the steam generating heater control means, the steam supplied from the water supply means is supplied to the steam generating means so that the steam is reliably generated from the steam generating means. Thus, the generated steam can continue to supply heat into the heating chamber, and can be reliably used as a heat source.

  As is clear from the above, according to the cooking device of the present invention, in the cooking device that performs cooking using both the steam generating heater and the heating heater, the cooking device that can effectively use the steam generating heater as a heat source. Can be realized.

FIG. 1 is a front view of a heating cooker according to an embodiment of the present invention as viewed from the front side. FIG. 2 is a front view of the heating cooker with the door opened. FIG. 3 is a schematic diagram of a longitudinal section viewed from the right side of the cooking device. FIG. 4 is a longitudinal sectional view as seen from the front of the heating cooker. FIG. 5 is a longitudinal sectional view as seen from the right side of the cooking device. FIG. 6 is a control block diagram of the cooking device. FIG. 7A is a timing chart from the start of the cooking operation using steam to reaching the target temperature. FIG. 7B is a timing chart of the comparative example. FIG. 7C is a timing chart after reaching the target temperature.

  Hereinafter, the cooking device of the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1: has shown the front view which looked at the heating cooker of one Embodiment of this invention from the front side, and FIG. 2 has shown the front view of the heating cooker in the state which opened the door.

  As shown in FIG. 1, the heating cooker of the first embodiment includes a rectangular parallelepiped main body casing 1, a heating chamber 2 (shown in FIG. 2) provided in the main body casing 1, and the front surface of the main body casing 1. And a door 3 rotatably attached to the side.

  The door 3 rotates around the lower end portion and opens and closes the opening 2 a of the heating chamber 2. A handle 4 is attached to the upper portion of the door 3. In addition, a heat resistant glass 5 is disposed at a substantially central portion of the door 3, and the user can visually recognize the state in the heating chamber 2 through the heat resistant glass 5. A heat resistant resin packing 40 (shown in FIG. 2) is fixed to the rear surface of the door 3 so as to surround the heat resistant glass 5. When the door 3 is closed, the packing 40 is in close contact with the peripheral edge of the opening 2 a of the heating chamber 2. Thereby, it can prevent that the water vapor | steam etc. in the heating chamber 2 leak from between the door 3 and the peripheral part of the opening part 2a of the heating chamber 2. FIG.

  An exhaust duct 30 having a dilution exhaust port 28 is disposed on the upper surface and the back surface side of the main body casing 1. One end of the exhaust duct 30 is connected to an exhaust port 19 provided in the heating chamber 2 shown in FIG. 2 via an exhaust port cover 24 (shown in FIG. 3).

  An operation panel 6 is provided on the right side of the front surface of the main casing 1. The operation panel 6 includes a liquid crystal display unit 7, a dial 8, and a plurality of buttons 9. A water tank 10 is accommodated below the dial 8. The water tank 10 is detachable from the main casing 1, and is attached to the main casing 1 or removed from the main casing 1 from the front side of the main casing 1.

  The heating cooker includes a dew receptacle 50 (shown in FIG. 1) detachably attached to the lower side and the front side of the main casing 1. The dew receiver 50 receives water droplets that fall along the inner surface of the door 3 and the front surface of the main casing 1.

  As shown in FIG. 1, the heating cooker is provided with a heat shield plate 18 (shown in FIG. 3) made of stainless steel on the side surface, the bottom surface, and the top surface of the heating chamber 2. A heat insulating material (not shown) is arranged around the heating chamber 2 and inside the door 3 so that the inside of the heating chamber 2 and the outside are insulated.

  Upper tray receiving portions 43 and 44 and lower tray receiving portions 45 and 46 having a two-stage upper and lower structure are provided on the inner sides of both sides in the heating chamber 2.

  FIG. 3 is a schematic diagram of a longitudinal section viewed from the right side of the heating cooker, and the same reference numerals are given to the same components as those in FIGS. In FIG. 3, 10 is a water tank for storing water for steam, 11 is a water level sensor for detecting the water level in the water tank 10, 12 is a water supply pump, 13 is a water supply pipe, 14 is an upper heater, 15 is an upper heater cover, Reference numeral 16 denotes a stainless steel tray on which an object to be heated 90 is placed, 17 is a lower heater, 18 is a heat shield, 19 is an exhaust port provided at the lower rear surface of the heating chamber 2, and 20 is a steam generator as an example of steam generating means. , 21 is a steam outlet for blowing out steam from the steam generator 20, 24 is an exhaust port cover, 25 is an exhaust temperature sensor, 27 is a cold air path, 28 is a dilution exhaust port, 30 is an exhaust duct, 31 is an opening for introducing cold air Reference numeral 50 denotes a dew receptor. Further, one end of the water supply pipe 13 is connected to a connection portion (not shown) provided on the lower side of the water tank 10, and the other end of the water supply pipe 13 is connected to the steam generator 20.

  The water tank 10 and the water supply pump 12 constitute water supply means. The upper heater 14 and the lower heater 17 constitute a heater.

  The water supply pump 12 sucks water in the water tank 10 and supplies the water to the steam generator 20 via the water supply pipe 13. The steam generation device 20 includes a steam generation heater 21, which generates water vapor by heating water from the feed water pump 12 through the steam generation heater 21, and the generated water vapor is supplied to the heating chamber 2 via the steam outlet 22. The water vapor can be supplied into the heating chamber 2, or the water vapor can be superheated to form superheated water vapor and supplied into the heating chamber 2. Here, the said superheated steam means the steam heated to the overheated state of 100 degreeC or more.

  The object to be heated 90 can be heated with water vapor or superheated steam from the steam generator 20, and can also be heated with radiant heat from the upper heater 14 and the lower heater 17. A ceiling wall of the heating chamber 2 is provided below the upper heater 14, and a bottom wall of the heating chamber 2 is provided on the lower heater 17. The upper heater 14 and the lower heater 17 are not exposed in the heating chamber 2.

  The total power consumption of the heaters (upper heater 14 and lower heater 17) is 1500W, and the power consumption of the steam generating heater 21 is 900W. Since an ordinary household outlet can only be used up to a maximum of 1500 W at a rating of 100V15A, the heater (upper heater 14 and lower heater 17) and the steam generating heater 21 cannot be turned on simultaneously.

  Therefore, in the heating cooker of this embodiment, the first period during which the heaters (upper heater 14 and lower heater 17) can be turned on (48 seconds in this embodiment) and the second period during which the steam generating heater 21 can be turned on. (In this embodiment, 12 seconds are alternately repeated). That is, in the first period, the heaters (upper heater 14 and lower heater 17) may be turned on / off, but the steam generating heater 21 may be turned off, and in the second period, the steam generating heater 21 may be turned on / off. The heaters (upper heater 14 and lower heater 17) are off.

  In addition, an internal temperature sensor 29 (shown in FIG. 6) that detects the temperature in the heating chamber 2 is disposed on the upper right side of the heating chamber 2.

  FIG. 4 shows a longitudinal sectional view as seen from the front of the cooking device, and FIG. 5 shows a longitudinal sectional view as seen from the right side of the cooking device. 4 and 5, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals.

  As shown in FIGS. 4 and 5, an electrical component chamber S in which electrical components are disposed is formed on the right side of the heating chamber 2 disposed in the main body casing 1. The electrical component chamber S is partitioned by a partition plate 41 on the back side. A cooling fan 53 for sending cooling air from the back side to the electrical component room S is disposed on the partition plate 41. A cooling fan motor 54 for driving the cooling fan 53 is attached to the back side of the main casing 1. Further, a magnetron 61 and an inverter unit 62 attached to the main body casing 1 are arranged on the leeward side of the cooling fan 53 in the electrical component room S. The inverter unit 62 converts an AC voltage from the power source into a drive voltage for the magnetron 61.

  And the cooling fan 53 takes in external air from the some inlet 55 (shown in FIG. 5) formed in the back surface of the main body casing 1, and blows off the taken in outside air as cooling air.

  A rotating antenna 51 (shown in FIG. 5) and a rotating antenna motor 52 (shown in FIG. 6) for driving the rotating antenna 51 are disposed below the heating chamber 2. Then, the microwave generated in the magnetron 61 is guided to the lower center of the heating chamber 2 by the waveguide 60 (shown in FIG. 4), and is rotated by the rotating antenna 51 driven by the rotating antenna motor. The object to be heated 90 is heated by being radiated upward inside.

  FIG. 6 shows a control block diagram of the cooking device. As shown in FIG. 6, this cooking device includes a control device 100 including a microcomputer and an input / output circuit. The control device 100 includes a heater control unit 100a that controls the upper heater 14 and the lower heater 17 that are heaters so that the temperature in the heating chamber 2 detected by the internal temperature sensor 29 becomes a target temperature. Steam generation for controlling the steam generating heater 21 so that the steam generating heater 21 is not turned on when the upper heater 14 and the lower heater 17 are turned on, and is turned on when the upper heater 14 and the lower heater 17 are turned off. Heater control means 100b. The control device 100 rotates the upper heater 14, the lower heater 17, the steam generation heater 21, and the rotation based on the signal from the operation panel 6 and the detection signals from the interior temperature sensor 29, the water level sensor 11, and the exhaust temperature sensor 25. The antenna motor 52, the cooling fan motor 54, the operation panel 6, the water supply pump 12, and the inverter unit 61 are controlled.

  Hereinafter, the steam heating operation of the cooking device configured as described above will be described with reference to FIGS. When a power switch (not shown) of the operation panel 6 is pressed, the power is turned on, and operation of the oven cooking using superheated steam is started by operating the operation panel 6. Then, first, the control device 100 detects whether or not the water tank 10 is normally mounted by a water tank detection unit (not shown), and if the water tank 10 is normally mounted, the water supply pump 12 operation is started. Then, water is supplied from the water tank 10 into the steam generator 20 through the water supply pipe 13 by the water supply pump 12.

  Next, the water in the steam generator 20 is boiled by the steam generating heater 21 to generate saturated steam, and the generated saturated steam is further heated to become superheated steam at 100 ° C. or higher (depending on the cooking content). Then, it is supplied into the heating chamber 2 from the steam outlet 22.

  In this way, superheated steam is blown into the heating chamber 2 and at the same time the upper heater 14 and the lower heater 17 are energized to be placed on the tray 16 while maintaining a uniform temperature and humidity distribution in the heating chamber 2. The heated object 90 is heated. In that case, the superheated steam that has contacted the surface of the object to be heated 90 also heats the object to be heated 90 by releasing latent heat when dew condensation occurs on the surface of the object to be heated 90. Thereby, a large amount of heat of superheated steam can be reliably and promptly applied to the entire surface of the article 90 to be heated. Therefore, it is possible to realize heat cooking with no spots and good finish.

  Further, when time elapses during the cooking operation, the amount of steam in the heating chamber 2 increases, and the surplus amount of steam passes through the exhaust port cover 24 and the exhaust duct 30 from the exhaust port 19. Through the dilution exhaust port 28.

  After cooking, the control device 100 displays a cooking end message on the liquid crystal display unit 7 of the operation panel 6 and further sounds a signal by a buzzer (not shown) provided on the operation panel 6.

  On the other hand, in the case of the microwave heating operation, when the operation panel 6 is operated by the user and the start key (not shown) is pressed after the microwave cooking menu is determined, the microwave heating cooking is performed. Operation starts. Then, the control device 100 drives the magnetron 61 to supply the microwave to the object to be heated 90 via the waveguide 60 and the rotating antenna 51, thereby heating the object to be heated 90.

  FIG. 7A shows a timing chart from the start of the cooking operation using the steam from the steam generator 20 and the heaters (upper heater 14 and lower heater 17) until reaching the target temperature, and the heaters (upper heater 14 and lower heater). The on operation for 48 seconds of 17) and the on operation for 12 seconds of the steam generating heater 21 are alternately repeated. In the cooking operation using steam, the control device 100 generates the steam by the first period during which the heaters (upper heater 14 and lower heater 17) can be turned on by the heater control means 100a and by the steam generation heater control means 100b. Control that alternately repeats the second period in which the heater 21 can be turned on is performed.

  FIG. 7B shows a timing chart after reaching the target temperature in the comparative example, and the timing chart in FIG. 7B is an example for comparison and is not the present invention.

  As shown in FIG. 7B, in the first period in which the heaters (upper heater 14 and lower heater 17) can be turned on, the heater (100) is controlled by the heater control means 100a so that the temperature in the heating chamber 2 becomes the target temperature. The upper heater 14 and the lower heater 17) are turned on and off, but when the heater (the upper heater 14 and the lower heater 17) is turned off, the steam generating heater 21 which is a usable heat source is not turned on (region surrounded by a dotted line).

  On the other hand, in the heating cooker of this embodiment, as shown in FIG. 7C, the temperature in the heating chamber 2 is the target temperature in the first period in which the heaters (upper heater 14 and lower heater 17) can be turned on. When the heaters (upper heater 14 and lower heater 17) are turned on / off by the heater control means 100a, steam is generated by the steam generation heater control means 100b when the heaters (upper heater 14 and lower heater 17) are turned off. The heater 21 is turned on. As a result, the steam generated from the steam generating heater 21 can be effectively used by supplying the steam from the steam generating device 20 into the heating chamber 2.

  According to the cooking device configured as described above, in the cooking operation using both the steam from the steam generator 20 and the heater (the upper heater 14 and the lower heater 17), the temperature in the heating chamber 2 becomes the target temperature. Thus, the control means 100a controls the heaters (upper heater 14 and lower heater 17), does not turn on the steam generating heater 21 when the upper heater 14 and lower heater 17 are turned on, and the heater (upper heater 14). The steam generating heater 21 control means 100b controls the steam generating heater 21 so that the steam generating heater 21 is always turned on when the lower heater 17) is turned off. Accordingly, in the cooking device that performs cooking using both the steam generating heater 21 and the heater (upper heater 14 and lower heater 17), the steam generating heater 21 can be effectively used as a heat source. Therefore, the cooking time can be shortened, and by supplying a large amount of steam into the heating chamber, the cooking object can be cooked with good finish without any spots.

  In addition, in the cooking operation using both the steam from the steam generator 20 and the heater (upper heater 14 and lower heater 17), the control device 100 can turn on the heater (upper heater 14 and lower heater 17). The first period and the second period in which the steam generating heater 21 can be turned on are alternately controlled. In this cooking operation, the heater control means 100a turns on and off the heaters (the upper heater 14 and the lower heater 17) in the first period so that the temperature in the heating chamber 2 becomes the target temperature, and the steam generating heater. The control means 100b turns on the steam generating heater 21 in the second period. Further, the steam generating heater control means 100b turns on the steam generating heater 21 when the heaters (upper heater 14 and lower heater 17) are in the OFF state in the first period. Therefore, the basic control flow of the cooking operation that alternately repeats the first period in which the heaters (upper heater 14 and lower heater 17) can be turned on and the second period in which the steam generation heater 21 can be turned on is disturbed. In addition, the steam generating heater 21 can be effectively used as a heat source, and the cooking operation can be easily controlled.

  Further, when the steam generation heater control means 100b turns on the steam generation heater 21, the water supplied by the water supply means (water tank 10 and water supply pump 12) is supplied to the steam generation apparatus 20 from the steam generation apparatus 20. Steam can be reliably generated, and heat can be continuously supplied into the heating chamber 2 by the generated steam, so that it can be reliably used as a heat source.

  The heating cooker includes a temperature sensor that detects the housing temperature of the steam generating device 20, and when the control device 100 turns on the steam generating heater 21, the housing temperature of the steam generating device 20 falls below a predetermined temperature. Then, the water supply pump 12 is turned off.

  In the above embodiment, the heating cooker provided with the upper heater 14 and the lower heater 17 as the heating heater has been described. However, the heating heater is not limited to this, and the heating cooker provided with either the upper heater or the lower heater. Alternatively, the present invention may be applied to a heating cooker provided with a heater provided on at least one of the upper, lower, back, left side, or right side of the heating chamber.

  As the cooking device of the present invention, for example, not only an oven range using superheated steam but also an oven using superheated steam, an oven range using saturated steam without using superheated steam, and saturated without using superheated steam There are ovens that use steam.

  In the cooking device of the present invention, healthy cooking can be performed by using superheated steam or saturated steam in a microwave oven or the like. For example, in the cooking device of the present invention, superheated steam or saturated steam having a temperature of 100 ° C. or higher is supplied to the food surface, and the superheated steam or saturated steam adhered to the food surface is condensed to give a large amount of condensation latent heat to the food. So it can efficiently transfer heat to food. Moreover, when condensed water adheres to the food surface and salt and oil are dropped together with condensed water, salt and oil in the food can be reduced. Further, the heating chamber is filled with superheated steam or saturated steam to be in a low oxygen state, thereby enabling cooking while suppressing food oxidation. Here, the low oxygen state refers to a state where the volume% of oxygen is 10% or less (for example, 0.5 to 3%) in the heating chamber.

  Although specific embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Main body casing 2 ... Heating chamber 2a ... Opening part 3 ... Door 4 ... Handle 5 ... Heat-resistant glass 6 ... Operation panel 7 ... Liquid crystal display part 10 ... Water tank 11 ... Water level sensor 12 ... Water supply pump 13 ... Water supply pipe 14 ... Top Heater 15 ... Upper heater cover 16 ... Tray 17 ... Lower heater 18 ... Heat shield 19 ... Exhaust port 20 ... Steam generating device 21 ... Steam generating heater 22 ... Steam outlet 24 ... Exhaust port cover 28 ... Dilution exhaust port 29 ... Warehouse Internal temperature sensor 30 ... Exhaust duct 31 ... Cooling air introduction opening 43,44 ... Upper tray receiver 45,46 ... Lower tray receiver 50 ... Dew receiver 51 ... Rotating antenna 52 ... Rotating antenna motor 53 ... Cooling fan 54 ... Motor for cooling fan 55 ... Air intake port 56 ... Mounting plate 60 ... Waveguide 61 ... Magnetron 62 ... Inverter part 90 ... Object to be heated

Claims (3)

Steam generating means having a steam generating heater for heating water to generate steam;
A heating chamber to which steam from the steam generating means is supplied;
A heater for heating an object to be heated in the heating chamber;
In a heating cooking operation using both the steam from the steam generating means and the heater, a heater control means for controlling the heater so that the temperature in the heating chamber becomes a target temperature;
In the cooking operation using both the steam from the steam generating means and the heater, the steam generating heater is not turned on when the heater is turned on, and the steam generating heater is always turned on when the heater is turned off. A heating cooker comprising the steam generating heater control means for controlling the steam generating heater so as to be turned on. The heating cooker according to claim 1, wherein
In a cooking operation using both the steam from the steam generating means and the heater, a first period in which the heater can be turned on by the heater control means, and the steam generating heater by the steam generator heater control means The steam cooker is characterized in that the steam generating heater is turned on by the steam generating heater control means when the heater is in the OFF state in the first period while alternately repeating a second period in which the steam can be turned on. . The heating cooker according to claim 1 or 2,
A heating cooker comprising water supply means for supplying water to the steam generating means when the steam generating heater is turned on by the steam generating heater control means.

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