JP2009210186A - Heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating cooker reduced in the distribution of a temperature in a cooking chamber while keeping a plug receptacle of a general home at a rated value or lower. <P>SOLUTION: A control part 16 switches the energization of a heating heater 21 and a steam generating heater 29 at an interval which is an integer multiple of a cycle of commercial power. Therefore, both the heating heater 21 and the steam generating heater 29 are not energized at the same, so that power consumption does not exceed rated values of the heating heater 21 and the steam generating heater 29. Thus, even in a cooking mode of energizing both the heating heater 21 and the steam generating heater 29 such as a steam cooking mode, a rated value equal to or lower than that of the plug receptacle in the general home can be kept. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cooking device.

A cooking device for cooking using steam includes a heater for heating air supplied to the cooking chamber and a steam generating heater for generating steam. In such a cooking device, in the steam cooking mode using steam, the heater and the steam generating heater are used at the same time. On the other hand, if the heater and the steam generating heater are used at the same time, the power consumption may exceed the rating of a general household outlet. In view of this, a heating cooker is known in which the heater and the steam generating heater are composed of a main heater and a sub heater with different ratings, and the main heater and the sub heater are switched according to the cooking mode (see Patent Documents 1 and 2).
JP 2006-300486 A JP 2005-265341 A

  However, the main heater and the sub heater constituting the heater for heating the air supplied to the cooking chamber are both provided close to each other in the passage through which the air circulates. Therefore, the air heated by the heater passes through the main heater or the sub heater regardless of whether or not energization is performed. As a result, the non-energized heater of the main heater or the sub heater prevents the heated air from circulating. Thereby, the responsiveness of the temperature change of a heating chamber falls, there existed problems, such as the precision of the temperature control of a heating chamber falling, or a heating nonuniformity arising.

  Therefore, the present invention has been made in view of the above-described problems, and the purpose thereof is to maintain a general household outlet below the rated value even when a heater and a steam generating heater are used simultaneously as in the steam cooking mode. However, it is providing the heating cooker which reduces the temperature distribution of a cooking chamber.

  The cooking device of the present invention includes a main body forming a cooking chamber, a heater that generates heat when energized, and energizes heating air supply means that supplies air heated by the heating heater to the cooking chamber. A water vapor generating heater that heats water to generate water vapor, and supplies water vapor generated by the water vapor generating heater to the cooking chamber, and is supplied by the heated air supply means as a cooking mode. Control means for alternately switching energization of the heater and the steam generating heater in units of an integral multiple of a cycle of a commercial power source when a steam cooking mode using air and steam supplied by the steam supply means is selected; It is characterized by providing.

  According to the present invention, the heater and the steam generating heater are alternately energized in units of an integral multiple of the cycle of the commercial power source. Therefore, even when it is necessary to energize both the heater and the steam generator as in the steam cooking mode using steam, the total power consumption of the heater and steam generator exceeds the rating of the heater or steam generator. There is no. Therefore, even when the heater and the steam generating heater are used at the same time as in the steam cooking mode, it is possible to maintain the rating below the ordinary household outlet. Further, according to the present invention, it is not necessary to provide a preliminary heater that is not energized in the heater and the water vapor generating heater. Therefore, the circulation of the air heated by the heater that is not energized is not hindered. Further, the heater and the steam generating heater are intermittently energized at intervals of an integral multiple of the cycle of the commercial power source. Therefore, the time during which energization is stopped by each heater is short, and the temperature change in the cooking chamber is reduced. Therefore, it is possible to reduce spots in the temperature distribution in the cooking chamber.

  Furthermore, according to the present invention, the energization of the heater and the steam generating heater is switched at an interval that is an integral multiple of the cycle of the commercial power source. Therefore, for example, a configuration for generating a signal that is a reference for switching time of energization, such as a clock signal generation unit, is not required. Therefore, switching of energization between the heater and the steam generating heater can be achieved with a simple configuration.

Hereinafter, the heating cooker by this invention is demonstrated based on drawing. Note that, in a plurality of embodiments, substantially the same components are denoted by the same reference numerals, and description thereof is omitted.
(First embodiment)
A cooking device according to a first embodiment of the present invention is shown in FIGS. As shown in FIGS. 1 to 3, the heating cooker 10 includes a main body 11, a heated air supply unit 12, a water vapor supply unit 13, a high-frequency heating unit 14, an operation unit 15, a control unit 16, and the like.
As shown in FIG. 2, the main body 11 has a cooking chamber 17 formed therein. The front part of the main body 11 is opened and an entrance / exit 18 is formed. The food to be cooked is fed into the cooking chamber 17 through the entrance 18 and taken out from the cooking chamber 17 through the entrance 18. A door 19 is attached to the main body 11. The door 19 is provided so as to be rotatable around a horizontal axis 20 at the lower end between a vertical closed state in which the doorway 18 is closed or a horizontal open state in which the doorway 18 is opened.

  The heated air supply unit 12 includes a heater 21 and a circulation fan 22. The heater 21 generates heat when energized. In the case of this embodiment, the rated output of the heater 21 is set to 1300W. The circulation fan 22 is disposed inside the heater 21. The circulation fan 22 forms an air flow around the heater 21 when energized. As shown in FIG. 3, the heater 21 and the circulation fan 22 are provided outside the cooking chamber 17 behind the main body 11. The heater 21 and the circulation fan 22 are accommodated in an accommodation chamber 25 formed by a rear wall 23 of the cooking chamber 17 and an accommodation cover 24 that covers the heater 21 and the circulation fan 22.

  An air suction port 26 is provided in the rear wall 23 of the cooking chamber 17 at a position corresponding to the center of the circulation fan 22 of the storage chamber 25. The rear wall 23 has a plurality of holes 27 that form an air inlet 26. An air outlet 28 is provided on the rear wall 23 of the cooking chamber 17 on the outer side in the radial direction from the outer peripheral portion of the circulation fan 22. The rear wall 23 has a plurality of holes 27 that form air outlets 28. The air inlet 26 and the air outlet 28 connect the cooking chamber 17 and the storage chamber 25 in which the heater 21 and the circulation fan 22 are stored. When the circulation fan 22 rotates, the air in the cooking chamber 17 circulates between the storage chamber 25 via the air inlet 26 and the air outlet 28.

  When the circulation fan 22 is driven, the air in the cooking chamber 17 is sucked into the storage chamber 25 from the air suction port 26 and blown out from the air outlet 28 to the cooking chamber 17 via the vicinity of the heater 21. Thereby, when the heater 21 is energized, the air heated by the heater 21 circulates between the cooking chamber 17 and the storage chamber 25. Thus, by circulating the heated air between the cooking chamber 17 and the storage chamber 25, the temperature of the cooking chamber 17 is kept substantially uniform. On the other hand, when the heater 21 is not energized, the air circulates without being heated.

  As shown in FIGS. 1 and 2, the water vapor supply unit 13 includes a water vapor generating heater 29, an evaporator 30, a water supply tank 31, a water supply pump 32, and a water supply pipe 33. As shown in FIG. 2, the water vapor generating heater 29 is provided integrally with the evaporator 30 on the side wall 34 that forms the cooking chamber 17 on the left side of the main body 11. The evaporator 30 is provided outside the cooking chamber 17 with the side wall 34 interposed therebetween. The water vapor generating heater 29 generates heat when energized. Thereby, the metal evaporator 30 is heated by the water vapor generating heater 29. The evaporator 30 forms an evaporation chamber 35 inside. The evaporation chamber 35 is connected to the water supply tank 31 via the water supply pipe 33. Thereby, the water stored in the water supply tank 31 is supplied to the evaporation chamber 35 by the water supply pump 32. The side wall 34 that partitions the evaporator 30 and the cooking chamber 17 has a plurality of steam outlets 36 that connect the evaporation chamber 35 and the cooking chamber 17.

When the steam generation heater 29 is energized, the evaporator 30 is heated by the steam generation heater 29. At this time, when the water supply pump 32 is driven to supply water from the water supply tank 31 to the evaporation chamber 35, the water supplied to the evaporation chamber 35 is evaporated by contacting the evaporator 30 to generate water vapor. The water vapor generated in the evaporation chamber 35 is supplied to the cooking chamber 17 via the water vapor outlet 36.
As shown in FIG. 1, the high frequency heating unit 14 includes an inverter 37 and a magnetron 38. The magnetron 38 is provided outside the cooking chamber 17 and generates a high frequency by the electric power supplied from the inverter 37. The high frequency generated by the magnetron 38 is applied to the cooking chamber 17 from the bottom wall side of the main body 11 via a waveguide (not shown), for example.

  The operation unit 15 includes input keys, switches, a display, and the like (not shown). The user inputs a predetermined operation from the operation unit 15 to the control unit 16. The heating cooker 10 includes a cooking mode selection unit 39 that selects a cooking mode in the operation unit 15. That is, the user inputs, for example, the start of cooking, the heating time, or the selected cooking mode from the operation unit 15. The control unit 16 controls the cooking device 10 based on information input from the operation unit 15. The operation unit 15 displays the set heating time, the selected cooking mode, and the like on a display (not shown).

  Next, the electrical configuration of the heating cooker 10 will be described with reference to FIG. The control unit 16 is composed of a microcomputer having a CPU, a ROM, a RAM, and the like (not shown). The control unit 16 is electrically connected to the operation unit 15, the circulation fan 22, the water supply pump 32, the zero cross detection unit 40, and the energization switching unit 41. The control unit 16 controls each unit of the heating cooker 10 according to a control program stored in the ROM.

  The zero cross detection unit 40 detects a zero cross of the commercial power source, that is, a point where the voltage of the AC commercial power source becomes 0V. As shown in FIG. 4, the zero-cross detection unit 40 includes a zero-cross detection circuit having a photocoupler 42 and a current limiting resistor 43. The photocoupler 42 is turned on when the polarity of the AC commercial power supply is positive. Thereby, the zero cross detection unit 40 outputs a zero cross signal as shown in FIG. 5 to the control unit 16. The control unit 16 sets a period for energizing the heater 21 and the steam generating heater 29 based on the zero cross signal. The zero cross signal is output in synchronization with the cycle of the AC commercial power supply.

  The energization switching unit 41 switches energization between the heater 21 and the steam generation heater 29. The energization switching unit 41 includes a switching element such as a triac, for example. The energization switching unit 41 switches energization of the heater 21 and the steam generation heater 29 based on the cycle of the zero cross signal output from the zero cross detection unit 40, that is, the cycle of the commercial power source. The control unit 16 controls the energization of the heater 21 or the steam generation heater 29 by the energization switching unit 41 based on the zero cross signal.

Next, the operation of the heating cooker 10 configured as described above will be described.
The heating cooker 10 of this embodiment has, for example, a steam cooking mode, an oven cooking mode, a range cooking mode, and the like as cooking modes. Of these, in the steam cooking mode, both the heater 21 and the water vapor generating heater 29 are used. When the steam cooking mode is selected by the input from the operation unit 15, the control unit 16 sets a cycle for switching the energization of the heater 21 and the steam generation heater 29. At this time, the control unit 16 switches energization of the heater 21 and the water vapor generating heater 29 in units of integer multiples of the cycle of the commercial power source. The minimum unit of the cycle at which the control unit 16 switches the energization of the heater 21 and the steam generating heater 29 is set by the frequency of the commercial power source. For example, when the frequency of the commercial power supply is 50 Hz, the minimum unit of the cycle for switching energization is 1/50 second. Further, when the frequency of the commercial power source is 60 Hz, the minimum unit of the cycle for switching energization is 1/60 seconds.

Specific examples will be described below.
(Specific example 1)
Specific example 1 describes an example in which the frequency of the commercial power supply is set to 50 Hz. Thereby, in the case of the specific example 1, the minimum unit which switches electricity supply between the heater 21 and the steam generation heater 29 will be 1/50 second. Hereinafter, 1/50 second, which is the minimum unit for switching energization, is described as “one cycle”. In the case of the specific example 1, the control unit 16 sets the period for energizing the heater 21 to 38 cycles, and sets the period for energizing the water vapor generating heater 29 to 12 cycles. That is, the controller 16 energizes the heater 21 for 38 cycles and energizes the water vapor generating heater 29 for 12 cycles as shown in FIG. The control unit 16 may not energize the heater 21 or the water vapor generating heater 29 continuously, but may energize the heater 21 and the water vapor generating heater 29 alternately by dividing each cycle finely.

In the present embodiment, the rated output of the heater 21 is 1300 W, and the rated output of the steam generating heater 29 is 1200 W. Therefore, assuming that the periods of energizing the heater 21 and the steam generating heater 29 are 38 and 12 periods, respectively, the power consumption of the heater 21 and the steam generating heater 29 is calculated by the following equations, respectively.
Power consumption of heater: 38/50 × 1300W = 988W
Power consumption of steam generating heater: 12/50 × 1200W = 288W
In this way, by switching the period of energizing the heater 21 and the steam generating heater 29, the power consumption of the heater 21 and the steam generating heater 29 is about 1000 W and about 300 W, respectively.

  In the steam cooking mode, the finishing degree of cooking changes by changing the period in which the heater 21 and the steam generating heater 29 are energized. For example, when the cycle of energizing the steam generating heater 29 is lengthened, the “healthy mode” in which the amount of steam is increased and oil contained in the food is effectively removed. On the other hand, when the period for energizing the heater 21 is lengthened, the temperature of the heated air becomes high, and a “condense mode” in which the surface of the food is appropriately burnt is set. “Healthy mode” or “Kongari mode” is selected by an input from the operation unit 15.

In the present embodiment, in the “healthy mode”, the control unit 16 sets the cycle of energizing the heater 21 and the steam generating heater 29 at a ratio of 5: 5. Thereby, the quantity of the water vapor | steam supplied to the cooking chamber 17 from the water vapor | steam supply part 13 increases. In this case, the power consumption of each heater is calculated by the following equation.
Power consumption of heater: 25/50 × 1300W = 650W
Power consumption of water vapor generating heater: 25/50 × 1200W = 600W
On the other hand, in the “condense mode”, the control unit 16 sets the cycle of energizing the heater 21 and the steam generating heater 29 to a ratio of 7: 3. Thereby, the output of the heater 21 increases and the temperature of the air supplied from the heated air supply unit 12 to the cooking chamber 17 increases. In this case, the power consumption of each heater is calculated by the following equation.
Power consumption of heater: 35/50 × 1300W = 910W
Power consumption of steam generating heater: 15/50 × 1200W = 360W
Thus, the control part 16 changes the period which switches electricity supply of the heater 21 and the steam generation heater 29 according to cooking mode.

According to 1st Embodiment described above, there exist the following effects.
The heater 21 and the water vapor generating heater 29 are alternately energized at intervals of an integral multiple of the cycle of the commercial power source. Therefore, even in the cooking mode in which both the heater 21 and the steam generating heater 29 are energized as in the steam cooking mode, the power consumption does not exceed the respective ratings of the heater 21 or the steam generating heater 29. Therefore, even when the heater 21 and the water vapor generating heater 29 are used at the same time as in the steam cooking mode, it is possible to maintain the rating below the ordinary household outlet.

  In the first embodiment, the energization of the heater 21 and the steam generating heater 29 is switched at intervals of an integral multiple of the cycle of the commercial power supply, and the outputs of the heater 21 and the steam generating heater 29 are varied. Therefore, it is not necessary to vary the outputs of the heater 21 and the steam generating heater 29 by combining a plurality of heaters. Thereby, it is not necessary to provide preliminary heaters having different ratings, and the air flow is not hindered by useless heaters that are not energized. In addition, since a plurality of heaters are not required, the positional relationship between the heater 21 and the air outlet 28 is always kept constant. Therefore, the position of the air outlet 28 is optimized according to the air flow path and the position of the heater 21. Therefore, the responsiveness of the temperature change of the cooking chamber 17 with respect to the energization of the heater 21 can be improved, and the temperature distribution in the cooking chamber 17 can be reduced.

  In the first embodiment, the heater 21 and the steam generating heater 29 are intermittently energized in units of an integral multiple of the commercial power cycle. As a result, the heater 21 and the water vapor generating heater 29 become very short, from several tenths of a second, which is the period of the commercial power supply, to a fraction of a second, in which the energization is stopped. Therefore, the temperature change of the heater 21 and the water vapor generating heater 29 is reduced. Therefore, the responsiveness to energization of the heater 21 and the steam generating heater 29 can be enhanced, and the temperature change in the cooking chamber 17 can be reduced.

In the first embodiment, the control unit 16 detects the zero cross of the commercial power supply and uses it as a reference for the switching time of energization. Therefore, for example, a configuration for generating a signal serving as a reference for the switching timing of energization such as a clock signal generation unit is unnecessary. Therefore, switching of energization between the heater 21 and the steam generating heater 29 can be achieved with a simple configuration.
In 1st Embodiment, the control part 16 changes the period which switches electricity supply of the heater 21 and the steam generation heater 29 according to the cooking mode which the user selected. Thereby, the power consumption of the heater 21 and the steam generation heater 29 is finely adjusted. Therefore, it is possible to provide a cooked food having an appropriate finish according to the user's preference.

(Second Embodiment)
A heating cooker 110 according to a second embodiment of the present invention will be described with reference to FIG.
In the case of the second embodiment, the cooking device 110 includes a cooking mode selection unit 116 and a cooking menu selection unit 117 in the operation unit 115 as shown in FIG. The operation unit 115 has input keys, switches, a display, and the like (not shown). For example, the user selects a cooking menu from a list of menus displayed on the display. The cooking menu is stored in advance in the ROM of the control unit 16 of the heating cooker 110. Based on the cooking menu selected by the cooking menu selection unit 117 of the operation unit 115, the control unit 16 changes a cycle for switching the energization of the heater 21 and the steam generation heater 29 according to the cooking elapsed time of the cooking menu.

  Specifically, the control unit 16 reads out the cooking process stored in advance in the ROM in accordance with the cooking menu selected by the cooking menu selection unit 117. And the control part 16 changes the period which switches electricity supply of the heater 21 and the water vapor | steam generation heater 29 by the first half and the latter half of the cooking process based on the read cooking menu. The cooking menu is set according to the cooking object such as “hamburger”, “mesh grilled pork”, “smooth pudding”, and the like. When the user selects the cooking menu, the control unit 16 automatically cooks the cooking object in accordance with a program corresponding to the cooking menu.

  For example, in the steam cooking mode using superheated steam, the control unit 16 increases the ratio of energizing the heater 21 in the first half of the cooking process based on the selected cooking menu. Therefore, the period for energizing the heater 21 is longer than the period for energizing the steam generating heater 29. Thereby, in the first half of the cooking process, the temperature increase rate of the cooking chamber 17 is increased. On the other hand, the control unit 16 increases the ratio of energizing the steam generating heater 29 in the second half of the cooking process based on the selected cooking menu. Therefore, the period for energizing the heater 21 is shorter than the period for energizing the steam generating heater 29. Thereby, in the second half of the cooking process, the amount of superheated steam in the cooking chamber 17 increases, and the removal of oil from the food to be cooked is promoted. Accordingly, the temperature of the cooking chamber 17 quickly reaches the set temperature in the first half of the cooking process, and the oil content of the food to be cooked is effectively removed by the superheated steam in the second half of the cooking process.

  In 2nd Embodiment, based on the cooking menu which the user selected, the control part 16 changes the period which switches the electricity supply of the heater 21 and the steam generation heater 29 according to the cooking elapsed time of a cooking menu, ie, the ratio of electricity supply. Let Thereby, the outputs of the heater 21 and the steam generating heater 29 are finely adjusted according to the cooking object. Therefore, cooking can be performed at an appropriate temperature according to the cooking target.

(Third embodiment)
A cooking device 210 according to a third embodiment of the present invention will be described with reference to FIG.
The heating cooker 210 of the third embodiment includes a temperature sensor 211 that detects the temperature of the cooking chamber 17. The temperature sensor 211 has a temperature measuring element such as a thermistor, for example, and detects the temperature of the cooking chamber 17. Based on the temperature of the cooking chamber 17 detected by the temperature sensor 211, the control unit 16 changes the cycle for switching the energization of the heater 21 and the steam generating heater 29.

  Specifically, the control unit 16 stores a target value of the temperature of the cooking chamber 17 corresponding to the cooking menu in the ROM in advance. When the cooking menu is set by input from the operation unit 15, the control unit 16 reads the target temperature value of the cooking chamber 17 from the ROM. Based on the temperature of the cooking chamber 17 detected by the temperature sensor 211, the control unit 16 changes the cycle for switching the energization of the heater 21 and the steam generating heater 29 to bring the temperature of the cooking chamber 17 closer to the target value. For example, when the temperature of the cooking chamber 17 is lower than the target value, the control unit 16 increases the energization ratio of the heater 21 to promote the temperature increase of the cooking chamber 17. On the other hand, when the temperature of the cooking chamber 17 approaches the target value, the control unit 16 increases the energization ratio of the water vapor generating heater 29. Thereby, the amount of water vapor supplied to the cooking chamber 17 is increased, and the heat capacity in the cooking chamber 17 is increased. As a result, the temperature change of the cooking chamber 17 becomes small, and the temperature of the cooking chamber 17 is easily maintained at the target value.

  In 3rd Embodiment, the control part 16 changes the period which switches electricity supply of the heater 21 and the steam generation heater 29 based on the temperature of the cooking chamber 17. FIG. The control unit 16 accurately detects the temperature change in the cooking chamber 17 using the temperature sensor 211. Therefore, the control part 16 can maintain the temperature of the cooking chamber 17 at the temperature suitable for the cooking menu.

(Fourth embodiment)
A cooking device 310 according to a fourth embodiment of the present invention will be described with reference to FIG.
In the case of the fourth embodiment, the water vapor supply unit 313 includes two water vapor generating heaters 329 and 330. The two water vapor generating heaters 329 and 330 are electrically connected in parallel as shown in FIG. In addition, the water vapor supply unit 313 includes a switch 331 that is electrically connected in series with one of the water vapor generation heaters 329 and 330. That is, the water vapor generating heater 329 corresponds to the adjusted water vapor generating heater in the claims. The switch 331 is composed of, for example, a relay or a switching element, and has a function of intermittently energizing the steam generation heater 329. The control unit 16 intermittently energizes the water vapor generating heater 329 by the switch 331.

Next, control of the heating cooker 310 according to the fourth embodiment will be described.
In the case of the fourth embodiment, the steam generation heaters 329 and 330 both have a rated output of 600 W. When the switch 331 cuts off the power supply to the steam generating heater 329, the steam generating heater 329 does not generate heat. Therefore, the power consumption of the water vapor supply unit 313 is 600W. On the other hand, when the switch 331 allows energization of the steam generating heater 329, the steam generating heater 329 generates heat. Here, if the water vapor generating heater 329 is energized for a half period of the period during which the water vapor supply unit 313 is energized, the total power consumption of the water vapor supply unit 313 is 900 W. That is, for example, when the frequency of the commercial power source is 50 Hz, when the steam supply unit 313 is energized 50 times the cycle of the commercial power source, that is, 50 cycles, the steam generation heater 330 is energized for 50 cycles, whereas the steam generation heater 329 is energized for 25 cycles. As a result, the power consumption of the steam generation heater 330 per unit time is 600 W, while the power consumption of the steam generation heater 329 is 300 W, and the total consumption output in the steam supply unit 313 is 900 W.

  As described above, the control unit 16 controls the open / close period of the switch 331 to change the output of the water vapor generation heater 329 and control the amount of water vapor generated in the water vapor supply unit 313. The steam supply heater 329 and the steam generation heater 330 are provided in the steam supply section 313, and the amount of steam generated from the steam supply section 313 is controlled in more detail by opening and closing the energization of one of the steam generation heaters 329 with the switch 331. Is done. Therefore, in the cooking mode using steam, an amount of steam more suitable for cooking can be supplied.

  The present invention described above is not limited to the above-described embodiment, and can be applied to various embodiments without departing from the gist thereof.

The block diagram which shows schematic structure of the heating cooker by 1st Embodiment of this invention. Sectional drawing which looked at the heating cooker by 1st Embodiment of this invention from the front Sectional drawing which looked at the heating cooker by 1st Embodiment of this invention from the side surface Schematic of a zero cross detection circuit according to a first embodiment of the present invention. Schematic which shows the relationship between the output signal of the zero crossing detection circuit by 1st Embodiment of this invention, and commercial power supply. Schematic which shows the period which switches electricity supply of the heater by 1st Embodiment of this invention, and a steam generation heater The block diagram which shows schematic structure of the heating cooker by 2nd Embodiment of this invention. The block diagram which shows schematic structure of the heating cooker by 3rd Embodiment of this invention. The block diagram which shows schematic structure of the heating cooker by 4th Embodiment of this invention. The schematic diagram which shows the electrical connection of the water vapor generation heater and adjustment water vapor generation heater by 4th Embodiment of this invention

Explanation of symbols

  In the drawings, 10, 110, 210 and 310 are cooking devices, 11 is a main body, 12 is a heated air supply unit (heated air supply unit), 13 is a water vapor supply unit (water vapor supply unit), and 16 is a control unit (control unit). ), 17 is a cooking chamber, 21 is a heater, 29, 329 and 330 are steam generation heaters, 39 and 116 are cooking mode selection units (cooking mode selection means), 41 is an energization switching unit (control means), and 117 is cooking A menu selection unit (cooking menu selection unit), 211 is a temperature sensor (temperature detection unit), and 331 is a switch (opening / closing unit).

Claims (5)

A body forming a cooking chamber;
A heating air supply means that has a heater that generates heat when energized, and supplies air heated by the heater to the cooking chamber;
A water vapor generating means for generating water vapor by heating water by energization, and water vapor supplying means for supplying water vapor generated by the water vapor generating heater to the cooking chamber;
When the steam cooking mode using the air supplied by the heated air supply means and the water vapor supplied by the water vapor supply means is selected as the cooking mode, energization of the heater and the water vapor generating heater is performed by a commercial power source. Control means for switching alternately in units of an integer multiple of the period;
A heating cooker comprising: A cooking mode selection means for selecting the cooking mode;
2. The cooking device according to claim 1, wherein the control unit changes a cycle for switching energization of the heater and the water vapor generating heater according to a cooking mode selected by the cooking mode selection unit. A cooking menu selection means for selecting the cooking menu;
The said control means changes the period which switches electricity supply of the said heater and the said steam generation heater according to cooking time based on the cooking menu selected by the said cooking menu selection means. Cooking device. A temperature detecting means for detecting the temperature of the cooking chamber;
The cooking device according to claim 1, wherein the control unit changes a cycle for switching energization of the heater and the steam generating heater according to the temperature of the cooking chamber detected by the temperature detection unit. The water vapor supply means is electrically connected in series with a plurality of the water vapor generating heaters that are electrically connected in parallel and the adjusted water vapor generating heater that is one of the water vapor generating heaters. Open / close means for intermittently energizing the
2. The cooking device according to claim 1, wherein when the water vapor generating heater is energized, the control means intermittently energizes the adjusting water vapor generating heater with the opening / closing means.

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