JP4589819B2 - Cooking equipment - Google Patents

Description

  The present invention relates to a heating cooking apparatus provided with a steam feeder for supplying water vapor into a cooking chamber.

Some of the above-described cooking devices have a configuration in which a container in which a heater is embedded is housed in a cooking chamber and water vapor is generated based on injecting water into the container. In the case of this configuration, another heater is accommodated in the cooking chamber, and steam is overheated by the other heater in the cooking chamber.
Japanese Patent Laid-Open No. 2004-218917

  In the case of the heating cooker, it is necessary to spray another heater based on forcibly circulating water vapor in the cooking chamber. This necessitates a fan device that forcibly circulates water vapor, which complicates the configuration. And since the installation space of a fan apparatus is needed, the effective volume of a cooking chamber becomes small.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cooking device having a simple configuration that can supply superheated steam into the cooking chamber without reducing the effective volume of the cooking chamber. There is to do.

The cooking device according to the present invention includes a cooking chamber in which a food item is stored, a steam supply device that supplies steam to the cooking chamber, and a heater that heats the cooking material with a medium different from steam, The steam feeder includes a container having a space-like steam generation chamber, a water injector for injecting water into the steam generation chamber, and the steam provided based on heating water in the steam generation chamber. A steam generation heat source for generating water vapor in the generation chamber; a superheat heat source for heating the water vapor in the steam generation chamber; provided in the container at a location higher than the steam generation heat source ; A plurality of steam ports for discharging the steam generated in the steam generating chamber to the cooking chamber, and the steam generating heat source extends in a straight line and protrudes from the container at both ends. Having an electrode for the overheating The source extends parallel to the direction in which the steam generating heat source extends, has power supply electrodes protruding from the container at both ends, and the plurality of steam ports are located on a common horizontal line. The extending direction of the horizontal line is parallel to the extending direction of the heat source for generating steam and the extending direction of the heat source for superheating .

  When the steam generating heat source generates water vapor based on heating water in the steam generating chamber, the water vapor rises in the steam generating chamber due to a convection phenomenon, and the superheat heat source raises the water vapor rising in the steam generating chamber in the steam generating chamber. Overheat. That is, since the steam is heated by the superheating heat source while raising the steam due to the convection phenomenon, a fan device for supplying the steam to the superheating heat source becomes unnecessary. For this reason, the configuration is simplified, and the effective volume of the cooking chamber is not reduced by the influence of the fan device.

<Example 1>
As shown in FIG. 1, the cabinet 1 has a rectangular box shape with an open front, and is configured by combining an outer box 2 and an inner box 3 as shown in FIG. 2. The inside of the inner box 3 functions as a space-like cooking chamber 4 having an open front surface, and the cooked food is put into and out of the cooking chamber 4 through the front surface. As shown in FIG. 1, a door 5 is attached to the cabinet 1. The door 5 is pivotable about a horizontal axis at the lower end, and the front surface of the cooking chamber 4 is closed based on the door 5 being pivoted into a vertical closed state. 5 is opened on the basis of a turning operation in an open state in which it is tilted horizontally forward.

  An upper rail 6 extending in the front-rear direction is formed on the left side surface and the right side surface of the cooking chamber 4, and an upper cooking plate 7 is detachably mounted on the upper rails 6 as shown in FIG. The As shown in FIG. 1, lower rails 8 extending in the front-rear direction are formed on the left side surface and the right side surface of the cooking chamber 4. On both lower rails 8, as shown in FIG. 9 is detachably mounted. The upper cooking plate 7 and the lower cooking plate 9 are used when performing heater steam cooking. During the heater steam cooking, the upper cooking plate 7 and the lower cooking plate 9 can be stored in the upper and lower two stages. To be.

  A casing 10 is fixed to the rear surface of the inner box 3 as shown in FIG. A fan motor 11 is fixed to the rear surface of the casing 10, and a rotating shaft of the fan motor 11 is inserted into the casing 10. A centrifugal fan 12 is fixed to the rotating shaft of the fan motor 11 so as to be located inside the casing 10, and a fan device 13 is constituted by the fan motor 11 and the fan 12.

  An upper discharge port 14 and a lower discharge port 15 are formed on the rear surface of the cooking chamber 4. The upper discharge port 14 and the lower discharge port 15 refer to an assembly of a plurality of through holes. The upper discharge port 14 is disposed at a higher position than the upper cooking pan 7, and the lower discharge port 15 is from the lower cooking plate 9. Located in a low place. A suction port 16 is formed on the rear surface of the cooking chamber 4. The suction port 16 refers to an aggregate of a plurality of through holes, and is disposed at a height between the upper cooking dish 7 and the lower cooking dish 9. That is, when the fan device 13 is driven, the air discharged from the upper discharge port 14 flows forward over the upper cooking plate 7 and hits the door 5, and the air discharged from the lower discharge port 15 flows to the lower cooking plate 9. The air flows downward and hits the door 5, and any air hitting the door 5 is sucked into the casing 10 from the suction port 16 through the space between the upper cooking dish 7 and the lower cooking dish 9.

  An annular inner heater 17 is fixed inside the casing 10, and the upper side portion of the inner heater 17 is arranged behind the upper discharge port 14 as shown in FIG. 2, and the lower side portion of the inner heater 17 is the lower side. It is arranged behind the discharge port 15. An annular outer heater 18 is fixed inside the casing 10 at the outer periphery of the inner heater 17. The outer heater 18 has a smaller rated output than the inner heater 17, and the upper side of the outer heater 18 is disposed behind the upper discharge port 14, and the lower side of the outer heater 18 is the lower discharge port 15. It is arranged behind. The inner heater 17 and the outer heater 18 are heated by heating the air discharged from the fan device 13, and when the inner heater 17 and the outer heater 18 are driven, the upper discharge port 14 and the inside of the cooking chamber 4 are driven. The hot air is discharged into the cooking chamber 4 from the lower discharge port 15 and is sucked into the casing 10 through the suction port 16. That is, the fan device 13, the inner heater 17, and the outer heater 18 constitute an oven cooking mechanism 19 (see FIG. 3) corresponding to a heater, and heats the food stored in the cooking chamber 4 with hot air. .

  As shown in FIG. 1, an internal temperature sensor 20 is fixed to the left side surface of the cooking chamber 4. The inside temperature sensor 20 detects the inside temperature of the cooking chamber 4 and is composed of a thermistor. As shown in FIG. 2, a machine room 21 is formed in the cabinet 1. The machine room 21 refers to a space between the outer box 2 and the inner box 3, and a magnetron 22 is housed in the machine room 21 on the right side of the cooking room 4. The magnetron 22 corresponds to a heater for heating the food stored in the cooking chamber 4 with microwaves. When the magnetron 22 is driven, microwaves are irradiated from the magnetron 22 into the cooking chamber 4 through the excitation port 23. Is done. As shown in FIG. 1, the excitation port 23 is formed on the right side surface of the cooking chamber 4 and includes a plurality of through holes.

  As shown in FIG. 2, the cabinet 1 is equipped with a steam generation unit 30 corresponding to a steam supplier. The steam generation unit 30 supplies water vapor into the cooking chamber 4 and is configured as follows. A steam generation container 31 is fixed in the machine room 21 on the left side of the cooking chamber 4. The steam generation container 31 is disposed at a height between the upper rail 6 and the lower rail 8, and as shown in FIG. 4, the case 32 whose right side surface is open and the right side surface of the case 32 are closed. It consists of joining the cover 33. The case 32 and the cover 33 are manufactured by die-casting the same kind of metal, and a space-like steam generation chamber 34 is formed between the case 32 and the cover 33.

  As shown in FIG. 2, a tank 35 is attached to the bottom plate of the cabinet 1. The tank 35 stores water, and the upper half of the tank 35 is accommodated in the machine room 21, and the lower half of the tank 35 protrudes downward from the machine room 21. The tank 35 is connected to a water inlet of a pump 36. The pump 36 pumps water out of the tank 35 based on operation using a pump motor 37 (see FIG. 6) as a drive source, and is housed in the machine room 21. The pump 36 corresponds to a water injector, and a hose 38 is connected to the discharge port of the pump 36 as shown in FIG. The hose 38 is housed in the machine room 21 and connected to a water supply port 39 made of metal pipe as shown in FIG. The water supply port 39 is fixed to the case 32 of the steam generation container 31. When the pump 36 is driven, water in the tank 35 is injected into the steam generation chamber 34 from the hose 38 through the water supply port 39. 34 falls on the bottom surface.

  An evaporation heater 40 corresponding to an evaporation heat source is embedded in the case 32 of the steam generation container 31. As shown in FIG. 5A, the evaporating heater 40 is configured by a straight tubular sheathed heater, and is disposed at the lower end portion of the case 32. The evaporating heater 40 is integrated with the case 32 on the basis of pouring molten metal in a state in which the evaporating heater 40 is housed in a die casting mold for manufacturing the case 32. The outer peripheral surface of the evaporating heater 40 is the case. 32 is in close contact. The evaporating heater 40 generates water vapor in the steam generating chamber 34 based on indirectly heating the water dropped from the water supply port 39 onto the bottom surface of the steam generating chamber 34 through the bottom surface of the steam generating chamber 34. The water vapor rises in the steam generation chamber 34. The electrodes at both ends of the evaporation heater 40 protrude from the case 32, and power supply lead wires 62 are connected to the electrodes at both ends of the evaporation heater 40.

  As shown in FIG. 5A, a superheater 41 corresponding to a heat source for superheating is embedded in the case 32 of the steam generation container 31. The superheater 41 is composed of a straight tubular sheathed heater, and the rated output of the superheater 41 is set larger than that of the evaporating heater 40. The superheater 41 is disposed at the upper end of the case 32, and is disposed opposite to the evaporation heater 40 with the steam generation chamber 34 interposed therebetween, as shown in FIG. The superheater 41 is integrated with the case 32 on the basis of pouring molten metal in a state in which the superheater 41 is accommodated in a die casting mold for manufacturing the case 32. The outer peripheral surface of the superheater 41 is the case. 32 is in close contact. The superheater 41 is disposed at a higher position than the evaporating heater 40, and indirectly superheats the steam rising in the steam generation chamber 34 through the wall surface of the steam generation chamber 34. As shown in FIG. 5A, the electrodes at both ends of the superheater 41 protrude from the case 32, and power supply lead wires 62 are connected to the electrodes at both ends of the superheater 41. Yes.

  As shown in FIG. 5A, three steam ports 42 are integrally formed on the cover 33 of the steam generation container 31 so as to be positioned on a common horizontal line. As shown in FIG. 4, each of these steam ports 42 has a cylindrical shape protruding toward the cooking chamber 4, and the steam rising in the steam generation chamber 34 is supplied from the three steam ports 42 to the steam generation chamber 34. Is discharged to the outside. On the left side of the cooking chamber 4, three air outlets 43 having a through hole shape are formed. Each of these air outlets 43 is disposed to the right of the steam port 42, and the water vapor discharged from each steam port 42 is discharged through the air outlet 43 to a height between the upper rail 6 and the lower rail 8. Is done. That is, the steam port 42 directly supplies water vapor into the cooking chamber 4 without passing through the path, and eliminates heat loss when the water vapor passes through the path.

  As shown in FIG. 4, a steam guide 44 is fixed to the left side surface of the cooking chamber 4, and three guide portions 45 are formed in the steam guide 44. Each of these guide portions 45 is disposed opposite to the right side of the steam port 43 and has a cylindrical shape extending horizontally in the left-right direction. Each of these guide portions 45 guides the flow direction of water vapor discharged from the left steam port 43, and the water vapor discharged from each steam port 43 is guided to the inner peripheral surface of the guide portion 45. Accordingly, the height between the upper rail 6 and the lower rail 8 flows straight in the horizontal direction.

  A fin group 46 is accommodated in the steam generation chamber 34 as shown in FIG. The fin group 46 superheats the steam rising in the steam generation chamber 34 in the middle of the rise, and includes three main upper fins 47, two main lower fins 48, two sub upper fins 49, and four. The sub-medium fin 50, the two sub-lower fins 51, and the two sub-end fins 52. As shown in FIG. 4, the three main upper fins 47 to the two sub-end fins 52 each have the same height as the horizontal width of the steam generation chamber 34. These three main upper fins 47 to two sub-end fins 52 are arranged so that the water vapor generated on the bottom surface of the steam generation chamber 34 flows along a maze-like bent path, as follows. It is configured.

  As shown in FIG. 5A, the case 32 is integrally formed with three horizontal main upper fins 47 and two horizontal main lower fins 48. Each main upper fin 47 is disposed below the steam port 42, and each main lower fin 48 is disposed between the upper main upper fins 47, and the water vapor rising in the steam generation chamber 34. Hits one of the three main upper fins 47 and the two main lower fins 48 with high accuracy before being discharged from the steam port 42.

  The case 32 is integrally formed with a sub upper fin 49 that is positioned between the main upper fins 47 and is vertical. Each of the sub upper fins 49 narrows the gap between the lower main upper fins 47 and the ceiling surface of the case 32, and is between the sub upper fins 49 and the lower main upper fins 47. Narrow steam passages 53 are respectively formed. The case 32 is integrally formed with two vertical sub-fins 50 positioned above each main lower fin 48. Each of the sub middle fins 50 narrows the gap between the upper main upper fin 47 and the lower main lower fin 48, and the width between each sub middle fin 50 and the lower main lower fin 48 is narrow. A steam passage 54 having a width wider than that of the steam passage 54 is formed between each sub middle fin 50 and the adjacent sub middle fin 50.

  A vertical sub-lower fin 51 is integrally formed in the case 32 so as to be positioned below each main lower fin 48. These sub-lower fins 51 divide the lower end portion of the steam generation chamber 34 into three superheat regions 56 that communicate with each other, and the steam generated on the bottom surface of the steam generation chamber 34 is divided into three superheat regions 56. It rises in divided. The case 32 has a sub-end fin 52 integrally formed at the rear end portion of the rear main upper fin 47 and the front end portion of the front main upper fin 47, and the rear sub-end fin 52 and the steam generation chamber 34. A steam passage 57 is formed between the rear surface and the steam passage 57 between the front sub-end fin 52 and the front surface of the steam generation chamber 34.

  A sensor mounting portion 58 is integrally formed with the case 32. As shown in FIG. 5B, the sensor mounting portion 58 projects into the steam generation chamber 34, and the sensor mounting portion 58 is located outside the steam generation chamber 34 in the steam mounting chamber 34. 59 is fixed. The steam temperature sensor 59 is a thermistor, and the temperature sensing part of the steam temperature sensor 59 is in close contact with the sensor mounting part 58. The steam temperature sensor 59 detects the room temperature of the steam generation chamber 34 through the case 32 and corresponds to a temperature sensor. An operation panel 60 (see FIG. 6) is fixed to the front surface of the cabinet 1 below the door 5, and a plurality of switches 61 can be operated from the front as shown in FIG. It is attached to.

  A control device 70 is accommodated in the machine room 21. The control device 70 is mainly composed of a microcomputer, and has a CPU 71, ROM 72 and RAM 73. The control device 70 is connected to the internal temperature sensor 20 and the steam temperature sensor 59. The control device 70 detects the internal temperature of the cooking chamber 4 based on the output signal from the internal temperature sensor 20, and the steam Based on the output signal from the temperature sensor 59, the room temperature of the steam generation chamber 34 is detected. A plurality of switches 61 are connected to the control device 70, and the control device 70 sets cooking contents according to the operation contents of the plurality of switches 61. This control device 70 corresponds to a heating control means and a water injection control means.

  A drive circuit 74 to a drive circuit 80 are connected to the control device 70. The fan motor 11 to the superheater 41 are connected to the drive circuit 74 to the drive circuit 80, and the control device 70 individually controls the drive of the fan motor 11 based on the output of the drive signal to the drive circuit 74. The inner heater 17 is individually driven and controlled based on the output of the driving signal to the driving circuit 75, and the outer heater 18 is individually driven and controlled based on the output of the driving signal to the driving circuit 76. The magnetron 22 is individually driven and controlled based on the output of the drive signal, the pump motor 37 is individually driven and controlled based on the output of the drive signal to the drive circuit 78, and the drive signal is output to the drive circuit 79. The evaporative heater 40 is individually driven and controlled based on that, and the superheater 41 is individually driven and controlled based on outputting a drive signal to the drive circuit 80.

  FIG. 7 shows a cooking program for heater steam cooking recorded in the ROM 72 of the control device 70. The CPU 71 of the control device 70 detects that the heater steam cooking has been selected based on the operation content of the switch 61. Sometimes a cooking program for heater steam cooking is detected from the ROM 72, and the cooking content is controlled based on the detection result of the cooking program. Hereinafter, a cooking program for heater steam cooking will be described.

  The CPU 71 starts driving the inner heater 17 in step S1, and starts driving the outer heater 18 in step S2. The inner heater 17 and the outer heater 18 are controlled by the ROM 72 with a predetermined on / off ratio. The on / off ratio of the inner heater 17 in step S1 and the on / off ratio of the outer heater 18 in step S2. Is set to the maximum value at which the output becomes the rated output.

  When the CPU 71 starts driving the outer heater 18 in step S2, the CPU 71 circulates hot air in the cooking chamber 4 based on turning on the fan motor 11 in step S3. Then, in step S4, the internal temperature of the cooking chamber 4 is detected based on the output signal from the internal temperature sensor 20, and in step S5, the preheating temperature (for example, 100 °) recorded in advance in the ROM 72 as the detection result of the internal temperature. Compare with C). Here, when it is detected that the detection result of the internal temperature has reached the preheating temperature, the process proceeds to step S6, and the driving of the internal heater 17 is stopped. Then, the driving of the outer heater 18 is stopped in step S7, and the hot air circulation operation is interrupted based on the driving stop of the fan motor 11 in step S8.

  When the CPU 71 stops driving the fan motor 11 in step S8, the CPU 71 starts driving the evaporating heater 40 in step S9 and starts driving the superheater 41 in step S10. The evaporating heater 40 and the superheater 41 are controlled at a predetermined on / off ratio in the ROM 72, and the on / off ratio of the evaporative heater 40 in step S9 and the on / off ratio of the superheater 41 in step S10. Is set to the maximum value at which the output becomes the rated output. That is, the operation at the maximum output of the evaporating heater 40 and the superheater 41 is performed in a state where the hot air circulation operation is stopped when the three of the fan motor 11, the inner heater 17, and the outer heater 18 are stopped.

  When the CPU 71 starts driving the overheater 41 in step S10, the process proceeds to step S11. Here, the chamber temperature of the steam generation chamber 34 is detected based on the output signal from the steam temperature sensor 59, and the detection result of the chamber temperature is compared with the steam generation temperature (for example, 120 ° C.) recorded in the ROM 72 in step S12. To do. Here, when it is detected that the detection result of the room temperature has reached the steam generation temperature, the process proceeds to step S13, and the evaporation heater 40 is turned off. In this heater steam cooking, since the steam generation container 31 is heated in advance by the hot air generated by the oven cooking mechanism 19, the room temperature of the steam generation chamber 34 reaches the steam generation temperature in a short time in step S12. That is, after the inside of the steam generation chamber 34 reaches the steam generation temperature, only the superheater 41 is continuously driven, and the inside of the steam generation chamber 34 is maintained at the steam generation temperature only by the output of the superheater 41. This steam generation temperature corresponds to the water injection start temperature.

  In the ROM 72 of the control device 70, water injection data is recorded as shown in FIG. This water injection data is obtained by recording the rotational speed of the pump motor 37 for each use state of both the evaporator heater 40 and the superheater heater 41. When the CPU 71 shifts from step S13 to step S14 in FIG. The rotational speed according to the use state of both 40 and the superheater 41 is detected. In this case, since the overheat heater 41 is used alone, a medium speed is detected as the rotation speed of the pump motor 37. The use state of the evaporating heater 40 and the superheater 41 corresponds to the operating state.

  When the CPU 71 detects the medium speed as the rotation speed of the pump motor 37 in step S14 of FIG. 7, the CPU 71 starts driving the pump motor 37 at the medium speed in step S15. The rotational speed of the pump motor 37 is set to a value that injects into the steam generation chamber 34 the amount of water that instantaneously evaporates the water that has fallen to the bottom surface of the steam generation chamber 34. Water is injected at a medium flow rate to generate water vapor at a medium flow rate.

  When the CPU 71 starts driving the pump motor 37 in step S15, the internal heater 17 is redriven in step S16, the external heater 18 is redriven in step S17, and the fan motor 11 is redriven in step S18. Hot air is circulated in the chamber 4. The re-driving of the inner heater 17 and the re-driving of the outer heater 18 are performed at a predetermined on / off ratio in the ROM 72. The on / off ratio of the inner heater 17 in step S16 and the outer heater 18 in step S17. The on / off ratio is set to a value at which the output is a low output below the rated output. That is, the normal operation for cooking the inner heater 17 and the outer heater 18 is performed in a state where only the overheat heater 41 is driven.

  When the CPU 71 restarts the fan motor 11 in step S18, the CPU 71 proceeds to the cooking process in step S19. In this cooking process, steam is supplied while circulating hot air in the cooking chamber 4, and steam heated by both the heat from the superheater 41 and heat from the hot air is supplied into the cooking chamber 4, The steam supplied into the cooking chamber 4 is further superheated by the inner heater 17 and the outer heater 18 based on the circulation with hot air. In this cooking process, the inner heater 17 and the outer heater 18 are on / off controlled so that the output signal of the internal temperature sensor 20 converges to the cooking temperature, and the pump motor 37 is set to a constant medium speed according to the single use of the superheater 41. The speed is controlled and the superheater 41 is on / off controlled so that the output signal of the steam temperature sensor 59 converges to the steam generation temperature.

  When the CPU 71 proceeds to step S20, it determines whether or not the cooking end condition is satisfied. When it is detected that the cooking end condition is satisfied, the process proceeds to step S21, and heater steam cooking is performed based on stopping driving of the fan motor 11, the inner heater 17, the outer heater 18, the pump motor 37, and the overheated heater 41. Finish.

  When the CPU 71 detects that steam cooking has been selected based on the operation content of the switch 61, the CPU 71 detects a cooking program for steam cooking from the ROM 72, and controls the cooking content based on the detection result of the cooking program. Hereinafter, a cooking program for steam cooking will be described.

  When the CPU 71 proceeds to step S21 in FIG. 9, the CPU 71 starts driving the evaporation heater 40. Then, the process proceeds to step S22 to start driving the overheater 41. The evaporative heater 40 and the superheater 41 are controlled at a predetermined on / off ratio in the ROM 72, and the on / off ratio of the evaporative heater 40 and the on / off ratio of the superheater 41 are both rated output. Is set to the maximum value.

  When the CPU 71 starts to drive the superheater 41 in step S22, the room temperature of the steam generation chamber 34 is detected based on the output signal from the steam temperature sensor 59 in step S23, and the detection result of the room temperature is determined as the steam generation temperature in step S24. (For example, 120 ° C). Here, when it is detected that the detection result of the room temperature has reached the steam generation temperature, the process proceeds to step S25, and the rotational speed of the pump motor 37 is detected from the water injection data of FIG. In this case, since both the evaporating heater 40 and the superheated heater 41 are used, a high speed is detected as the rotational speed of the pump motor 37.

  When the CPU 71 detects the rotational speed of the pump motor 37 in step S25 of FIG. 9, a high flow rate of water is injected from the tank 35 into the steam generation chamber 34 based on starting to drive the pump motor 37 at a high speed in step S26. And it transfers to the cooking process of step S27. In this cooking process, the food is heated with water vapor based on supplying water vapor into the cooking chamber 4, and high-temperature water vapor heated by the overheater 41 is supplied into the cooking chamber 4. In this cooking process, the speed of the pump motor 37 is controlled at a constant high speed according to the dual use of the evaporation heater 40 and the superheater 41, and the output signal of the steam temperature sensor 59 is set to the steam generation temperature. On / off control is performed to converge.

  When proceeding to step S28, the CPU 71 determines whether or not the cooking end condition is satisfied. Here, when it is detected that the cooking end condition is satisfied, the process proceeds to step S29, and the steam cooking is finished based on stopping the driving of the pump motor 37, the evaporation heater 40, and the superheater heater 41.

  When the CPU 71 detects that range steam cooking has been selected based on the operation content of the switch 61, the CPU 71 detects the cooking program for range steam cooking from the ROM 72, and controls the cooking content based on the detection result of the cooking program. Hereinafter, the cooking program for range steam cooking is demonstrated.

  When the CPU 71 proceeds to step S31 in FIG. 10, the evaporative heater 40 starts to be driven in the ROM 72 at a predetermined on / off ratio. In step S32, the chamber temperature of the steam generation chamber 32 is detected based on the output signal from the steam temperature sensor 59. In step S33, the detection result of the chamber temperature is compared with the steam generation temperature (for example, 120 ° C.). Here, when it is detected that the detection result of the room temperature has reached the steam generation temperature, the process proceeds to step S34, and the rotational speed of the pump motor 37 is detected from the water injection data of FIG. In this case, since the evaporating heater 40 is used alone, a low speed is detected as the rotational speed of the pump motor 37.

  When the CPU 71 detects the rotational speed of the pump motor 37 in step S34 of FIG. 10, a low flow rate of water is injected from the tank 35 into the steam generation chamber 34 based on starting to drive the pump motor 37 at a low speed in step S35. To do. Then, the driving of the magnetron 22 is started in step S36 and the process proceeds to the cooking process in step 37. In this cooking process, steam is supplied to the cooking chamber 4 while irradiating microwaves. The steam generated by the evaporation heater 40 is supplied into the cooking chamber 4 without being overheated. The supplied water vapor is superheated by microwaves. In this cooking process, the speed of the pump motor 37 is controlled at a constant low speed according to the single use of the evaporation heater 40, and the evaporation heater 40 is on / off controlled so that the output signal of the steam temperature sensor 59 converges to the steam generation temperature. .

  When proceeding to step S38, the CPU 71 determines whether or not the cooking end condition is satisfied. Here, when it is detected that the cooking end condition is satisfied, the routine proceeds to step S39, where the range steam cooking is finished based on stopping the driving of the magnetron 22, the pump motor 37 and the evaporation heater 40.

According to the said Example 1, there exists the following effect.
The evaporating heater 40 is disposed at a low position of the steam generating container 31, the superheated heater 41 is disposed at a high position of the steam generating container 31, and the superheated heater 41 is increased while the steam generated by the steam heater 40 is raised by convection during steam cooking. Therefore, the fan device for supplying water vapor to the superheater 41 becomes unnecessary. For this reason, the configuration is simplified, and the effective volume of the cooking chamber 4 is not reduced by the influence of the fan device.

  The evaporation heater 40 and the superheater 41 were cast into the case 32 of the steam generation container 31. For this reason, since the adhesion degree of the case 32 to the evaporation heater 40 and the adhesion degree to the superheater heater 41 are increased, heat can be efficiently transmitted from the evaporation heater 40 and the superheater heater 41 to the case 32. Therefore, when the heater steam cooking, the steam cooking or the range steam cooking is performed, the steam generating container 31 is heated to the steam generating temperature in a short time, so that the supply of water vapor to the cooking chamber 4 is started with a short waiting time. be able to.

  The amount of water injected into the steam generation chamber 34 was controlled based on the drive control of the pump motor 37 according to the use state of both the evaporation heater 40 and the superheater 41. For this reason, since only the required amount of water according to the steam generation capacity of the steam generation chamber 34 can be injected into the steam generation chamber 34 and the water injected into the steam generation chamber 34 can be instantly vaporized, Water can be prevented from accumulating in the generation chamber 34.

  The water injection operation for the steam generation chamber 34 was started based on the fact that the chamber temperature of the steam generation chamber 34 reached a predetermined steam generation temperature. For this reason, since water injected into the steam generation chamber 34 can be instantly vaporized, it is possible to prevent water from accumulating in the steam generation chamber 34.

  A fin group 46 is provided on the wall surface of the steam generation chamber 34. For this reason, since the contact area of the steam generation chamber 34 with respect to water vapor | steam increases, water vapor | steam can be overheated to high temperature when performing heater steam cooking, steam cooking, or range steam cooking. Moreover, the fin group 46 is arranged so that the water vapor generated on the bottom surface of the steam generation chamber 34 flows to the three steam ports 42 through a path bent in a maze shape. For this reason, since the contact time of the steam generation chamber 34 with respect to water vapor | steam increases, water vapor | steam can be overheated to high temperature also from this point.

  The controller 70 is configured to individually drive and control the evaporation heater 40 and the superheater heater 41. For this reason, at the time of heater steam cooking, water vapor can be supplied into the cooking chamber 4 based on the use of the high-power superheater 41 alone, and the water vapor can be superheated in the cooking chamber 4 with hot air. In addition, when steam cooking is performed, water vapor can be supplied into the cooking chamber 4 based on the single use of the low-power evaporation heater 40, and the water vapor can be heated in the cooking chamber 4 by microwaves. Further, since steam heated in the cooking chamber 40 can be supplied based on the use of both the evaporation heater 40 and the superheater 41 during steam cooking, the cooked food is steamed with limited electric power in the home. Can be cooked in.

  When performing the cooking process by heater steam cooking, the evaporation heater 40 was turned off, the superheater 41 and the oven cooking mechanism 19 were turned on, and the steam generation container 31 was heated by the superheater 41 and the oven cooking mechanism 19. For this reason, since water can be converted into water vapor and the water vapor can be superheated without using the evaporating heater 40, high temperature heater steam cooking can be performed with limited electric power in the home.

  In the first embodiment, the superheater 41 is disposed above the steam generation chamber 34. However, the present invention is not limited to this, and may be disposed within the range of the height of the steam generation chamber 34, for example. May be disposed higher than the evaporating heater 40. FIG. 11 shows a second embodiment in which the superheater 41 is disposed within the height range of the steam generation chamber 34.

  In the said Example 1-Example 2, although both the evaporation heater 40 and the superheater heater 41 were used when heating up the inside of the steam generation chamber 34 to a steam generation temperature by heater steam cooking, it is limited to this. Instead, for example, any one of the evaporating heater 40 and the superheater 41 may be used.

  In the first to second embodiments, the vapor generating container 31 is provided with one evaporating heater 40 and one overheated heater 41. However, the present invention is not limited to this. For example, a plurality of evaporating heaters 40 are provided. Or a plurality of overheaters 41 may be provided.

In the said Example 1-Example 2, although the steam generation container 31 was arrange | positioned on the left side of the cooking chamber 4, it is not limited to this, For example, you may arrange | position on the right side or the back side.
In the said Example 1-Example 2, although both the oven cooking mechanism 19 which heats the cooking thing in the cooking chamber 4 with a hot air, and the magnetron 22 heated with a microwave were provided, it is not limited to this. For example, only one of the oven cooking mechanism 19 and the magnetron 22 may be provided.

  In the first to second embodiments, the sheathed heater is used as the evaporating heater 40 and the superheater 41. However, the present invention is not limited to this. For example, a honeycomb heater or a plate heater may be used.

  In the first to second embodiments, the evaporation heater 40 and the superheater 41 are embedded in the steam generation container 31. However, the present invention is not limited to this and may be accommodated in the steam generation chamber 34. That is, water vapor may be generated based on heating water directly by the evaporation heater 40, and the water vapor may be directly heated by the superheater heater 41.

The figure which shows Example 1 (The figure which shows the external appearance of a heating cooking apparatus in the open state of a door) Sectional drawing which shows the internal structure of a heating cooking apparatus from the front Sectional drawing which shows the internal structure of a heating cooking apparatus from the side Sectional drawing which shows the internal structure of a steam generation container (sectional drawing which follows the X4 line of FIG. 5) Sectional drawing which shows the internal structure of a steam generation container (a is sectional drawing which follows the X5a line of FIG. 4, b is sectional drawing which follows the X5b line of FIG. 5) Block diagram showing electrical configuration The flowchart which shows the flow of the cooking program for heater steam cooking The figure which shows the correlation with the rotational speed of the pump motor and the use state of the heater (The figure which shows the record data of the control device) Flow chart showing the flow of cooking program for steam cooking Flow chart showing the flow of cooking program for range steam cooking FIG. 4 equivalent diagram showing the second embodiment.

Explanation of symbols

4 is a cooking chamber, 19 is an oven cooking mechanism (heater), 22 is a magnetron (heater), 30 is a steam generation unit (steam feeder), 31 is a steam generation container (container), 34 is a steam generation chamber, 36 Is a pump (water injection device), 40 is an evaporation heater (steam generation heat source), 41 is a superheater heater (superheat heat source), 42 is a steam port, 47 is a main upper fin (fin), 48 is a main lower fin (fin) , 49 is a sub upper fin (fin), 50 is a sub middle fin (fin), 51 is a sub lower fin (fin), 52 is a sub end fin (fin), 59 is a steam temperature sensor (temperature sensor), and 70 is controlled. The apparatus (water injection control means) is shown.

Claims (4)

A cooking chamber in which the food is stored;
A steam supply for supplying water vapor into the cooking chamber;
A heater for heating the cooked food with a medium different from water vapor,
The steam supply is
A container having a spatial steam generation chamber;
A water injector for injecting water into the steam generating chamber;
A steam generation heat source provided in the container and configured to generate water vapor in the steam generation chamber based on heating water in the steam generation chamber;
A heat source for overheating provided in the container at a position higher than the heat source for generating steam, and for superheating water vapor in the steam generation chamber ;
A plurality of steam ports that are provided in the container and discharge the steam generated in the steam generation chamber into the cooking chamber;
Equipped with a,
The steam generating heat source has a power supply electrode extending linearly and projecting from the container at each of both ends,
The heat source for superheating extends in parallel with the direction in which the heat source for steam generation extends, and has power supply electrodes protruding from the container at both ends,
The plurality of steam ports are located on a common horizontal line, and the extending direction of the horizontal line is parallel to the extending direction of the steam generating heat source and the extending direction of the superheat heat source. Cooking equipment. The cooking apparatus according to claim 1, wherein the steam supply device includes a plurality of fins that form steam passages through which water vapor generated on a bottom surface of the steam generation chamber flows to the plurality of steam ports. .   Water injection control means is provided for controlling the amount of water injected into the steam generation chamber based on driving control of the water injector according to the operating state of both the steam generation heat source and the superheat heat source. The heat cooking apparatus according to claim 1. A temperature sensor for detecting an indoor temperature of the steam generation chamber;
The said water injection control means performs control which starts the water injection operation | movement with respect to the said steam production | generation room | chamber based on the detection result of the said temperature sensor reaching the predetermined water injection start temperature. Cooking equipment.

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