JP4563270B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device that cooks food using steam.

  2. Description of the Related Art Conventionally, there is a steam cooking apparatus that injects steam into a cooking case as a heating cooker that heats an object to be heated such as food using steam (see, for example, Utility Registration No. 2515033 (Patent Document 1)). ). This steam cooking device includes a steam supply pipe having a steam injection nozzle portion inside a cooking case, and the steam from the steam generating means is supplied to the food in the food tray from the steam injection nozzle portion via the steam supply pipe. It is trying to inject towards.

  However, the conventional steam cooking apparatus has a problem that the cleaning ability and the usability are poor particularly as household cooking utensils because the steam supply pipe having the steam injection nozzle portion is exposed inside the cooking case. . Furthermore, since the steam is only spouted into the food tray from the steam spray nozzle part in which holes are arranged in a row at the bottom of one pipe, for example, a small amount of food is used to warm a bowl of rice. In the case of heating, there is a problem that steam cannot be injected intensively on food, the steam temperature is lowered, and the heating efficiency is poor.

Further, since the steam injection is injection by pumping at a constant pressure from the steam injection nozzle portion, the temperature of the steam injected into the cooking case is lowered. Therefore, if the temperature in the cooking case does not rise, the temperature of the food does not rise, and there is a problem that it takes time to heat the food.
Utility registration No. 2515033

  Then, the subject of this invention is providing the heating cooker which can be heated efficiently in a short time, when food is heated with non-superheated steam.

In order to solve the above problems, the heating cooker of the present invention is:
A steam generator for generating steam;
A heating chamber for heating an object to be heated by steam supplied from the steam generator;
A steam suction ejector that sucks the steam generated by the steam generator from the suction port and blows out from the blow port by the gas blown from the blow port;
One end is connected to the outlet of the steam suction ejector, while the other end is located in the outlet hole provided in the top plate of the heating chamber, and the steam from the outlet of the steam suction ejector is sent to the heating chamber . A steam injection pipe for injecting into the heating chamber from within the blowing hole in the top plate ;
A fan for blowing gas into the blowing port of the vapor suction ejector;
A fan control unit that performs intermittent operation of alternately rotating and stopping the fan so that the steam generated by the steam generator is intermittently injected into the heating chamber by the steam injection pipe as a lump. It is characterized by having prepared.

According to the above configuration, the object to be heated in the heating chamber, Ru is heated by steam injected from the air in the holes in the top plate of the heating chamber by the steam injection pipe having one end connected to the outlet of the steam suction ejector. At that time, the fan that blows gas into the blowing port of the steam suction ejector is intermittently so that the steam generated by the steam generator is intermittently injected into the heating chamber by the fan control unit into the heating chamber. I have luck rolling. Therefore, when the fan rotates during the period when the fan is stopped, the steam filled in the steam path from the steam generator through the steam suction ejector to the injection port of the steam injection pipe is rotated. It can inject to the to-be-heated object in the said heating chamber from a steam injection pipe.

  Thus, by intermittently operating the fan, the steam filled in the steam path can be repeatedly injected directly into the object to be heated as a lump, and the object to be heated can be directly heated with hot steam. Therefore, the object to be heated can be heated to a predetermined temperature without waiting for the temperature in the heating chamber to rise to the set temperature.

Moreover, in the heating cooker of one embodiment,
The stop time of the fan when performing the intermittent operation under the control of the fan control unit is from the steam generator in a path from the steam generator through the steam suction ejector to the outlet of the steam injection pipe. It is time that can be filled with steam.

  According to this embodiment, when the fan is intermittently operated, the fan is stopped only for a time during which the steam can be filled in the path. It can be sprayed onto the object to be heated. Accordingly, the heating efficiency of the object to be heated can be increased.

Moreover, in the heating cooker of one embodiment,
The rotation time of the fan when performing the intermittent operation under the control of the fan control unit is a time during which the air volume corresponding to the gas volume in the path can be blown.

  According to this embodiment, when the fan is intermittently operated, the fan is rotated for a time during which the air volume corresponding to the amount of gas in the path can be blown, so that the path is stopped until the fan stops next time. All the steam inside can be discharged. Therefore, it is possible to efficiently supply and discharge steam to the path, and to increase the heating efficiency of the object to be heated.

Moreover, in the heating cooker of one embodiment,
The fan control unit can switch between continuous operation and continuous operation that rotate the fan continuously,
The fan control unit performs the intermittent operation on the fan first, and switches to the continuous operation when the temperature in the heating chamber reaches a predetermined set temperature.

  According to this embodiment, when the temperature in the heating chamber reaches a predetermined set temperature, the object to be heated can be heated in a stable operation by switching the operation of the fan to the continuous operation. .

As apparent from the above, the heating cooker according to the present invention injects the object to be heated in the heating chamber from the outlet hole in the top plate of the heating chamber by the steam injection pipe having one end connected to the outlet of the steam suction ejector. When heating with steam , the fan that blows gas into the inlet of the steam suction ejector is intermittently injected into the heating chamber by the fan control unit as the steam generated by the steam generator into the heating chamber. as to, since the intermittent operation, steam filling the path to the injection port of the steam injection pipe via the steam suction ejector from the steam generator when it stops the fan, the object to be heated as a bulk Repeat Ru is directly injected into. Therefore, the object to be heated can be directly heated with hot steam, and the object to be heated can be heated to a predetermined temperature without waiting for the temperature in the heating chamber to rise to the set temperature.

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

  FIG. 1 is an external perspective view of the heating cooker according to the present embodiment. The heating cooker 1 is provided with an operation panel 11 at the upper part of the front surface of the rectangular parallelepiped cabinet 10, and a door 12 that rotates around the lower end side is provided below the operation panel 11 on the front surface of the cabinet 10. It is provided and roughly configured. A handle 13 is provided at the top of the door 12, and a heat-resistant glass window 14 is fitted into the door 12.

  FIG. 2 is an external perspective view of the heating cooker 1 with the door 12 opened. A rectangular parallelepiped heating chamber 20 is provided in the cabinet 10. The heating chamber 20 has an opening 20a on the front side facing the door 12, and the side surface, bottom surface and top surface of the heating chamber 20 are formed of stainless steel plates. The door 12 is formed of a stainless steel plate on the side facing the heating chamber 20. A heat insulating material (not shown) is placed around the heating chamber 20 and inside the door 12 to insulate the inside of the heating chamber 20 from the outside.

  Further, a stainless steel tray 21 is installed on the bottom surface of the heating chamber 20, and a stainless steel wire rack 24 (see FIG. 3) for placing an object to be heated is installed on the tray 21. The Furthermore, a substantially rectangular side surface steam outlet 22 (only one of which is visible in FIG. 2) is provided at the lower part of both side surfaces of the heating chamber 20.

  FIG. 3 is a schematic configuration diagram showing a basic configuration of the heating cooker 1. As shown in FIG. 3, the heating cooker 1 includes a heating chamber 20, a water tank 30 that stores steam water, and a steam generator 40 that generates steam by evaporating water supplied from the water tank 30. A steam temperature raising device 50 that heats the steam from the steam generating device 40, and a control device 80 that controls the operation of the steam generating device 40, the steam temperature raising device 50, and the like.

  A grid-like rack 24 is placed on a tray 21 installed in the heating chamber 20, and an object to be heated 90 is placed at the approximate center of the rack 24.

  The connecting portion 30 a provided on the lower side of the water tank 30 can be connected to a funnel-shaped receiving port 31 a provided at one end of the first water supply pipe 31. The suction side of the pump 35 is connected to the end of the second water supply pipe 32 that branches from the first water supply pipe 31 and extends upward, and one end of the third water supply pipe 33 is connected to the discharge side of the pump 35. ing. Further, a water tank water level sensor 36 is disposed at the upper end of a water level sensor pipe 38 that branches off from the first water supply pipe 31 and extends upward. Furthermore, the upper end of an air release pipe 37 branched from the first water supply pipe 31 and extending upward is connected to an exhaust duct 65 described later.

  The third water supply pipe 33 has an L shape that is bent substantially horizontally from a vertically disposed portion, and an auxiliary tank 39 is connected to the other end of the third water supply pipe 33. Furthermore, one end of the fourth water supply pipe 34 is connected to the lower end of the auxiliary tank 39, and the lower end of the steam generator 40 is connected to the other end of the fourth water supply pipe 34. Further, one end of the drain valve 70 is connected to a lower side than the connection point of the fourth water supply pipe 34 in the steam generator 40. One end of a drain pipe 71 is connected to the other end of the drain valve 70, and a drain tank 72 is connected to the other end of the drain pipe 71. Note that the upper portion of the auxiliary tank 39 is communicated with the atmosphere via the air release pipe 37 and the exhaust duct 65.

  When the water tank 30 is connected to the receiving port 31 a of the first water supply pipe 31, the water in the water tank 30 rises into the air release pipe 37 until the water level becomes the same as that of the water tank 30. At this time, the water level sensor pipe 38 connected to the water tank water level sensor 36 is sealed at the tip, so that the water level does not rise. However, according to the water level of the water tank 30, the water level sensor pipe 38 has a sealed space. The pressure rises from atmospheric pressure. By detecting this pressure change with a pressure detection element (not shown) in the water level sensor 36 for water tank, the water level in the water tank 30 is detected. In the water level measurement when the pump 35 is stationary, the air release pipe 37 is not necessary, but the suction pressure of the pump 35 directly acts on the pressure detection element, and the accuracy of the water level detection of the water tank 30 decreases. In order to prevent this, an air release pipe 37 having an open end is provided.

  The steam generator 40 includes a pot 41 having the other end of the fourth water supply pipe 34 connected to the lower side, a steam generating heater 42 disposed near the bottom surface of the pot 41, and steam generation in the pot 41. A water level sensor 43 disposed in the vicinity of the upper side of the heater 42 and a steam suction ejector 44 attached to the upper side of the pot 41 are provided. A fan casing 26 is disposed outside the suction port 25 provided in the upper side of the heating chamber 20. Then, the steam in the heating chamber 20 is sucked from the suction port 25 by the blower fan 28 installed in the fan casing 26, and the steam suction ejector of the steam generating device 40 through the first pipe 61 and the second pipe 62. 44 is sent to the inlet side. The first pipe 61 is disposed substantially horizontally and has one end connected to the fan casing 26. The second pipe 62 is arranged substantially vertically, and one end is connected to the other end of the first pipe 61 and the other end is connected to the inlet side of the inner nozzle 45 of the vapor suction ejector 44. .

  The steam suction ejector 44 includes an outer nozzle 46 that wraps the outside of the inner nozzle 45, and the discharge side of the inner nozzle 45 communicates with the internal space of the pot 41. One end of the third pipe 63 is connected to the discharge side of the outer nozzle 46 of the steam suction ejector 44, and the steam temperature raising device 50 is connected to the other end of the third pipe 63.

  The fan casing 26, the first pipe 61, the second pipe 62, the steam suction ejector 44, the third pipe 63, and the steam temperature raising device 50 form an external circulation path 60. One end of a discharge passage 64 is connected to the discharge port 27 provided on the lower side of the side surface of the heating chamber 20, and one end of an exhaust duct 65 is connected to the other end of the discharge passage 64. Further, an exhaust port 66 is provided at the other end of the exhaust duct 65. On the exhaust duct 65 side of the vapor discharge passage 64, a radiator 69 is externally fitted. An exhaust duct 65 is connected to a connection portion between the first pipe 61 and the second pipe 62 forming the external circulation path 60 via an exhaust passage 67. Further, a damper 68 that opens and closes the exhaust passage 67 is disposed on the connection side of the first and second pipes 61 and 62 in the exhaust passage 67.

  In addition, the steam temperature raising device 50 includes a dish-shaped case 51 disposed on the ceiling side of the heating chamber 20 and substantially in the center with the opening facing downward, and the steam disposed in the dish-shaped case 51. A heater 52 is provided. The bottom surface of the dish-shaped case 51 is formed by a metal ceiling panel 54 provided on the ceiling surface of the heating chamber 20. A plurality of ceiling steam outlets 55 are formed in the ceiling panel 54. Here, the upper and lower surfaces of the ceiling panel 54 are finished in a dark color by painting or the like. Note that the ceiling panel 54 may be formed of a metal material that changes to a dark color by repeated use or a dark-colored ceramic molded product.

  Further, the steam temperature raising device 50 is provided at one end of a steam supply passage 23 (only one is visible in FIG. 3) as the superheated steam supply passage that extends toward the left and right sides at the top of the heating chamber 20. Are connected to each other. The steam supply passage 23 extends downward along both side surfaces of the heating chamber 20, and is connected to a side surface steam outlet 22 provided on the lower side of both side surfaces of the heating chamber 20 at the other end. Has been.

  Next, the control system of the heating cooker 1 will be described.

  The control device 80 includes a microcomputer, an input / output circuit, and the like. As shown in FIG. 4, the blower fan 28, the steam heater 52, the damper 68, the drain valve 70, the steam generating heater 42, and the operation Panel 11, water tank water level sensor 36, water level sensor 43, temperature sensor 81 for detecting the temperature in heating chamber 20 (shown in FIG. 3), and humidity sensor 82 for detecting the humidity in heating chamber 20 The pump 35 is connected. Based on detection signals from the water tank water level sensor 36, the water level sensor 43, the temperature sensor 81, and the humidity sensor 82, the blower fan 28, the steam heating heater 52, the damper 68, the drain valve 70, the steam generating heater 42, the operation The panel 11 and the pump 35 are controlled according to a predetermined program.

  Hereinafter, the basic operation of the heating cooker 1 having the above configuration will be described with reference to FIGS. 3 and 4. When a power switch (not shown) of the operation panel 11 is pressed, the power is turned on, and the cooking operation is started by operating the operation panel 11. Then, first, the control device 80 closes the drain valve 70 and starts the operation of the pump 35 in a state where the exhaust passage 67 is closed by the damper 68. Then, water is supplied from the water tank 30 into the pot 41 of the steam generator 40 via the first to fourth water supply pipes 31 to 34 by the pump 35. Thereafter, when the water level sensor 43 detects that the water level in the pot 41 has reached a predetermined water level, the pump 35 is stopped to stop water supply.

  Next, the steam generating heater 42 is energized, and a predetermined amount of water accumulated in the pot 41 is heated by the steam generating heater 42.

  Simultaneously with the energization of the steam generating heater 42 or when the temperature of the water in the pot 41 reaches a predetermined temperature, the blower fan 28 is turned on and the steam heating heater 52 of the steam heating device 50 is energized. Then, the blower fan 28 sucks the gas (including steam) in the heating chamber 20 from the suction port 25 and sends the gas (including steam) to the external circulation path 60. In that case, since the centrifugal fan is used for the ventilation fan 28, a high pressure can be generated compared with the case where a propeller fan is used. Furthermore, by rotating the centrifugal fan used for the blower fan 28 at a high speed with a DC motor, the flow velocity of the circulating airflow can be extremely increased.

  Next, when the water in the pot 41 of the steam generator 40 boils, saturated steam is generated, and the generated saturated steam joins the circulating airflow passing through the external circulation path 60 at the location of the steam suction ejector 44. Then, the steam discharged from the steam suction ejector 44 flows into the steam temperature raising device 50 through the third pipe 63 at a high speed.

  And the steam which flowed into the said steam temperature rising apparatus 50 is heated by the steam heater 52, and becomes a superheated steam of about 300 degreeC (it changes with cooking contents). A part of this superheated steam is ejected downward from the plurality of ceiling steam outlets 55 provided in the lower ceiling panel 54 in the heating chamber 20. Further, the other part of the superheated steam is ejected from the side surface steam outlets 22 on both side surfaces of the heating chamber 20 through the steam supply passages 23 provided on the left and right sides of the steam temperature raising device 50.

  Thus, the superheated steam ejected from the ceiling side of the heating chamber 20 is vigorously supplied toward the heated object 90 side in the center, and the superheated steam ejected from the left and right side surfaces of the heating chamber 20 is supplied to the tray 21. After the collision, the material to be heated 90 is supplied while being wrapped from below the material 90 to be heated. As a result, in the heating chamber 20, convection occurs in such a manner that it blows down at the center and rises outside thereof. Then, the convection steam is sequentially sucked into the suction port 25 and repeatedly circulates through the external circulation path 60 and returns to the heating chamber 20 again.

  In this way, by forming a convection of superheated steam in the heating chamber 20, the superheated steam from the steam heating device 50 is blown to the ceiling steam while the temperature and humidity distribution in the heating chamber 20 is kept uniform. It is possible to eject the gas from the outlet 55 and the side outlet 22 and to efficiently collide with the heated object 90 placed on the rack 24, and the heated object 90 is heated by the collision of the superheated steam. 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. As a result, a large amount of heat of the 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 cooking with no spots and good finish.

  In addition, when the time elapses during the cooking operation, the amount of steam in the heating chamber 20 increases, and the surplus amount of steam passes from the discharge port 27 through the discharge passage 64 and the exhaust duct 65. And discharged from the exhaust port 66 to the outside. At that time, the steam passing through the discharge passage 64 is cooled and condensed by the radiator 69 provided in the discharge passage 64, thereby preventing the steam from being discharged to the outside as it is. The water condensed in the discharge passage 64 by the radiator 69 flows down in the discharge passage 64 and is guided to the receiving tray 21, and is processed together with the water generated by cooking after the cooking.

  After cooking, the control device 80 displays a cooking end message on the operation panel 11, and a buzzer (not shown) provided on the operation panel 11 sounds a signal. When a user who knows the end of cooking by these messages and buzzer opens the door 12, the control device 80 detects that the door 12 has been opened by a sensor (not shown) and opens the damper 68 of the exhaust passage 67. Open instantly. Then, the first pipe 61 of the external circulation path 60 communicates with the exhaust duct 65 via the exhaust passage 67, and the steam in the heating chamber 20 is blown by the blower fan 28 through the suction port 25, the first pipe 61, and the exhaust passage 67. And is discharged from the exhaust port 66 through the exhaust duct 65. This damper operation functions similarly even if the user opens the door 12 during cooking. Therefore, the user can safely take out the object 90 to be heated from the heating chamber 20 without being exposed to steam.

  Incidentally, as described above, the heating principle of the heating cooker 1 is that superheated steam of 100 ° C. or higher is supplied to the surface of the object 90 to be heated, and a large amount of heat energy is given to the object 90 to be heated by the latent heat of condensation of the superheated steam. Is to supply. That is, when the surface temperature of the object to be heated 90 is 100 ° C. or less and the sprayed steam is superheated steam having a temperature of 100 ° C. or more, the superheated steam adhering to the surface of the object to be heated 90 is condensed and is subjected to condensation latent heat. While being given to the heated object 90, 100 ° C. water (hot water) generated by condensation penetrates into the heated object 90 and raises the internal temperature.

  However, when heating a bowl of rice bowl, the heating principle of the heating cooker 1 described above cannot be applied as it is. That is, each rice grain has a small shape. Therefore, if superheated steam is given to rice, as a result, a large amount of heat will be given to each grain, and the surface of the rice grains will directly exceed 100 ° C. However, if the surface of the rice grain exceeds 100 ° C., the superheated steam will repeatedly condense and evaporate on the surface of the rice grain, and as a result, it cannot be condensed. Therefore, the surface of the rice grain exceeds 100 ° C. and becomes hard due to drying, whereas 100 ° C. condensed water (hot water) cannot be infiltrated into the rice grain (that is, the heat reaches the inside). It is difficult to be transmitted), and it takes about 7 minutes until the temperature reaches 60 ° C. to 70 ° C., which is called the appropriate temperature.

  From the above, when heating the rice, the warming time is shortened when the steam having a temperature of 80 ° C. to 90 ° C. is spouted without heating the steam. Therefore, in the present embodiment, the steam heating device 50 and the steam suction ejector 44 are devised as follows so that even a small amount of food such as when cooking rice has a large lump surface area. Even so, it is possible to heat efficiently.

  Hereinafter, the steam temperature raising device 50 and the steam suction ejector 44, which are the features of this embodiment, will be described in more detail with reference to FIGS. FIG. 5A is a plan view of the steam temperature raising device 50 viewed from the lower side, and FIG. 5B is a side view of the steam temperature raising device 50 viewed from the steam supply port side. As shown in FIGS. 5 (a) and 5 (b), the steam heating device 50 has a large pipe diameter of large power (1000 W) in a dish-shaped case 51 having a concave portion 51a having a substantially pentagonal planar shape. A steam heater 52 which is a sheathed heater is disposed. Although not shown in FIGS. 5 (a) and 5 (b), the opening of the recess 51 a of the dish-shaped case 51 is covered with a metal ceiling panel 54 provided on the ceiling surface of the heating chamber 20. Yes.

  Steam supply pipes 94A, 94B, 94C are connected to the side wall 91 of the dish-shaped case 51. The side wall 91 side to which the steam supply pipes 94A, 94B, 94C are connected is the back side of the main heating cooker 1. As shown in FIG. 3, the steam supply pipes 94A, 94B, 94C are the main heating cooker. 1 is connected to the steam suction ejector 44 provided on the back side of the heating chamber 20 via three third pipes 63. Further, 95A, 95B and 95C are steam supply ports of the steam supply pipes 94A, 94B and 94C, and 101A to 104A and 101B to 104B are steam outlets to which the steam supply passage 23 shown in FIG. 3 is connected.

  FIG. 6 is a longitudinal sectional view along the center line L of the dish-shaped case 51. One end of a steam injection pipe 111 disposed horizontally along the center line L is connected to the steam supply pipe 94 </ b> B disposed on the center line L in the recess 51 a of the dish-shaped case 51. The other end of the steam injection pipe 111 is bent toward the heating chamber 20 at the substantially central portion of the recess 51 a, and the inner pole of the lid member 54 a of the dish-shaped case 51 constituting a part of the ceiling panel 54. Located in the vicinity. Further, the lid member 54a is provided with a hole 112 so as to surround the opening 111a at the other end of the steam injection pipe 111.

  The steam temperature raising device 50 and the steam suction ejector 44 having the above-described configuration operate as follows.

(a) Steaming and warming mode This “steaming and warming mode” is a mode in which a small amount of food is steamed, boiled and warmed using non-superheated steam. Therefore, the above-described “steaming warming mode” is used to warm the above-mentioned bowl of rice bowl. The operations of the steam temperature raising device 50 and the steam suction ejector 44 described below are not specifically described. For example, the operation is performed under the control of the control device 80 when the user selects the “steaming / warming mode”. Is done.

  In this case, the energization to the steam heater 52 is turned off, the blower fan 28 is driven, and the blowing port of the inner nozzle 45 communicating with the steam supply ports 95A and 95C is closed by the damper, and is connected to the steam supply port 95B. The inlet of the inner nozzle 45 that communicates is opened. After that, the user places, for example, the tea bowl on which the above-mentioned rice is served, and is placed immediately below the opening 111a of the steam injection pipe 111 on the rack 24. And cooking is performed by the procedure as described above. In that case, since the steam heater 52 is not energized, the steam supplied from the steam supply pipe 94B is not heated.

  Then, the steam generated in the pot 41 of the steam generator 40 is caused by the functions of the inner nozzle 45 and the outer nozzle 46 in the steam suction ejector 44, as shown in FIG. The steam jet pipe 111 is supplied at high speed via 94B. In this way, the steam (non-superheated steam) of 80 ° C. to 90 ° C. supplied to the steam injection pipe 111 is ejected vigorously from the opening 111a and is sprayed onto one cup of rice that is the object to be heated 90. It is.

  In this case, as described above, when the injection is performed by constant pressure pumping by the constant speed rotation of the blower fan 28, the temperature of the steam injected into the heating chamber 20 decreases, and thus the temperature in the heating chamber 20 increases. Otherwise, the temperature of the object to be heated (one cup of rice) 90 will not rise, and it will take time to heat the object to be heated (one cup of rice) 90.

  Therefore, in the present embodiment, the blower fan 28 is intermittently rotated under the control of the control device 80. By doing so, while the rotation of the blower fan 28 is stopped, the pot is placed in a path from the pot 41 to the opening 111a of the steam injection pipe 111 through the outer nozzle 46 and the third pipe 63 of the steam suction ejector 44. The non-superheated steam from 41 is full. Therefore, after that, by rotating the blower fan 28, the filled non-superheated steam becomes a lump and is directly sprayed from the opening 111a of the steam injection pipe 111 onto the object to be heated 90. In this way, the rice can be heated directly with hot steam by spraying the lump of non-superheated steam vigorously and directly onto a cup of rice bowl as the object 90 to be heated. Therefore, the object to be heated 90 can be warmed to a predetermined temperature without waiting for the temperature in the heating chamber 20 to rise to the set temperature.

  In this case, the time for stopping the rotation of the blower fan 28 is a time during which non-superheated steam can be filled in the path from the pot 41 to the opening 111a of the steam injection pipe 111. By doing so, when the blower fan 28 rotates, a larger block of steam can be jetted onto the article 90 to be heated. The time for rotating the blower fan 28 is a time during which an air volume corresponding to the amount of gas from the pot 41 to the opening 111a of the steam injection pipe 111 can be blown. By doing so, all the steam in the path can be discharged before the blower fan 28 is stopped next time. Therefore, it is possible to efficiently supply and discharge the steam to and from the path, and to increase the heating efficiency of the article 90 to be heated.

  Further, as described above, when the object 90 is heated by intermittently rotating the blower fan 28, the temperature in the heating chamber 20 reaches the set temperature in the “steaming warming mode”. In this case, the intermittent operation of the blower fan 28 is canceled, and the operation is shifted to a continuous operation (normal operation) at a preset rotation speed so as to perform a stable heating operation.

  FIG. 7 is a flowchart of operation control of the blower fan 28 executed in the “steaming / warming mode”. According to this operation control, it is possible to heat one bowl of rice without waiting for the temperature in the heating chamber 20 to rise to the set temperature, and in about 3 minutes, a bowl of rice is called the appropriate temperature. It can be heated to 60 ° C to 70 ° C.

  In addition, although the said description demonstrated the case where the rice bowl of 1 cup of rice was warmed as an example, it cannot be overemphasized that it is not limited to "1 cup". In addition, as described above, cooking such as “boiled” or “steamed” can be performed.

(b) Water oven mode This “water oven mode” is a mode in which food is heated using superheated steam. This cooking mode is executed under the control of the control device 80, for example, when the user selects the menu “water oven mode”.

  In this case, energization to the steam heater 52 is turned on, the blower fan 28 is driven, the blowing port of the inner nozzle 45 communicating with the steam supply port 95B is closed by a damper, and the steam supply ports 95A and 95C are connected. The inlet of the inner nozzle 45 that communicates is opened. After that, a heated object 90 such as a meat lump is placed on the rack 24 by the user. And cooking is performed by the procedure as described above. In this case, since the steam heater 52 is energized, the steam supplied from the steam supply pipes 94A and 94C can be heated to generate superheated steam.

  The steam generated in the pot 41 of the steam generator 40 flows into the dish-shaped case 51 through the third pipe 63 at a high speed by the functions of the inner nozzle 45 and the outer nozzle 46 in the steam suction ejector 44. Thus, the steam supplied from the steam supply ports 95A and 95C into the dish-shaped case 51 is heated by the steam heater 52 to become superheated steam, and is jetted into the heating chamber 20 from the ceiling steam outlet 55 of the lid member 54a. It is. Thus, the superheated steam in the heating chamber 20 has a temperature (for example, approximately 300 ° C.) corresponding to the cooking. A part of the superheated steam in the dish-shaped case 51 is jetted into the heating chamber 20 from the steam outlets 101A to 104A and 101B to 104B via the steam supply passage 23 (shown in FIG. 3). , As described above.

  As described above, in the present embodiment, the blower fan 28 is intermittently rotated under the control of the control device 80 in the “steaming / warming mode”. Accordingly, the non-superheated steam filled in the path from the pot 41 to the opening 111a of the steam injection pipe 111 through the outer nozzle 46 and the third pipe 63 of the steam suction ejector 44 is repeatedly and vigorously repeated on the object 90 to be heated. The heated object 90 can be warmed in a short time without waiting for the temperature in the heating chamber 20 to rise to the set temperature.

  In the above-described embodiment, the steam heating device 50 is provided to enable a “water oven mode” in which food is heated using superheated steam at about 300 ° C. However, it goes without saying that the present invention can be applied to a configuration in which the food is heated only by non-superheated steam without the steam temperature raising device 50.

It is an external appearance perspective view in the heating cooker of this invention. It is an external appearance perspective view of the state which opened the door of the heating cooker shown in FIG. It is a schematic block diagram of the heating cooker shown in FIG. It is a control block diagram of the heating cooker shown in FIG. It is the top view seen from the lower side of the steam temperature rising apparatus in FIG. 3, and the side view seen from the steam supply port side. It is a longitudinal cross-sectional view along the centerline of the dish-shaped case in FIG. It is a flowchart of operation control of a ventilation fan.

1 ... Heat cooker,
20 ... heating chamber,
23 ... steam supply passage,
40 ... steam generator,
44 ... Vapor suction ejector,
50 ... Steam temperature raising device,
51 ... Dish-shaped case,
51a ... recess,
52 ... Steam heater,
60 ... External circuit,
80 ... control device,
111 ... Steam injection pipe,
111a ... opening,
112 ... hole.

Claims (4)

A steam generator for generating steam;
A heating chamber for heating an object to be heated by steam supplied from the steam generator;
A steam suction ejector that sucks the steam generated by the steam generator from the suction port and blows out from the blow port by the gas blown from the blow port;
One end is connected to the outlet of the steam suction ejector, while the other end is located in the outlet hole provided in the top plate of the heating chamber, and the steam from the outlet of the steam suction ejector is sent to the heating chamber . A steam injection pipe for injecting into the heating chamber from within the blowing hole in the top plate ;
A fan for blowing gas into the blowing port of the vapor suction ejector;
A fan control unit that performs intermittent operation to alternately rotate and stop the fan so that the steam generated by the steam generator is intermittently injected into the heating chamber by the steam injection pipe as a lump. A cooking device characterized by comprising. The heating cooker according to claim 1, wherein
The stop time of the fan when performing the intermittent operation under the control of the fan control unit is from the steam generator in a path from the steam generator through the steam suction ejector to the outlet of the steam injection pipe. It is time that can be filled with steam. The cooking device according to claim 2,
The heating cooker characterized in that the rotation time of the fan when performing the intermittent operation under the control of the fan control unit is a time during which the air volume corresponding to the gas volume in the path can be blown. The heating cooker according to claim 1, wherein
The fan control unit can switch between continuous operation and continuous operation that rotate the fan continuously,
The fan control unit performs the intermittent operation on the fan first, and switches to the continuous operation when the temperature in the heating chamber reaches a predetermined set temperature. .

Images