JP4278629B2 - 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, steam is only spouted into the food tray from a steam spray nozzle part with holes arranged in a row at the bottom of a single tube. In addition, when heating a food product made up of a granular material or an aggregate of linear materials, there is a problem that the heating efficiency is poor because steam cannot be sprayed concentrated on the food product.
Utility registration No. 2515033

  Accordingly, an object of the present invention is to provide a heating cooker that can be efficiently heated by steam, whether it is a food made of an aggregate of granular or linear objects or a food with a large lump surface area. It is in.

In order to solve the above problems, the heating cooker of the present invention is:
A steam generator for generating steam;
A steam temperature raising device that generates the superheated steam by raising the temperature of the steam that is generated by the steam generator and supplied from a plurality of steam supply ports by a heater;
A plurality of steam outlets are provided on the ceiling, supplied from the steam temperature raising device, and a heating chamber for heating an object to be heated by superheated steam blown from the steam outlets;
One end communicates with the steam generator, the other end is bent toward the heating chamber, and the opening at the other end is provided on the ceiling with the projection of the opening onto the ceiling of the heating chamber. A steam injection pipe disposed so as to be located in the steam outlet;
A heater energization control unit for turning on / off the energization of the heater;
A fan that is provided in the steam temperature raising device and discharges air sucked from the central portion from the surroundings;
A fan drive control unit for turning on and off the energization of the fan drive motor,
The steam temperature raising device and the heating chamber are disposed adjacent to each other via the ceiling of the heating chamber, and a steam outlet provided in the ceiling serves as a supply port for steam from the steam temperature raising device. And
The object to be heated in the heating chamber can also be heated by steam from the steam injection pipe.

  According to the configuration, when the energization to the heater is turned off by the heater energization control unit and the energization to the drive motor is turned off by the fan drive control unit, the steam from the steam generating device is injected into the steam injection. The heating chamber is supplied from a steam outlet of the ceiling through a pipe. Thus, the object to be heated in the heating chamber is heated by the non-superheated steam. Therefore, when the heated object is a food having a relatively small volume such as rice, the surface of the rice grains directly exceeds 100 ° C., for example, by being heated by steam at 80 ° C. to 90 ° C., for example. Is prevented. That is, the steam is efficiently condensed on the surface of the rice grains, and the supply of latent heat of condensation to the rice grains and the penetration of condensed water (hot water) are efficiently performed.

  On the other hand, when energization to the heater is turned on by the heater energization control unit, and energization to the drive motor is turned on by the fan drive control unit, the above-mentioned steam blowout port on the ceiling via the steam injection pipe The steam supplied into the heating chamber is drawn back into the steam heating device from the steam outlet where the opening of the steam injection pipe is located by the suction force of the fan. And with the vapor | steam supplied in the said vapor | steam temperature rising apparatus from the said vapor | steam supply port, it heats up by the said heater and becomes superheated vapor | steam. The superheated steam generated in this manner is supplied into the heating chamber from the steam outlet of the ceiling by the blow output of the fan. Thus, the object to be heated in the heating chamber is heated by the superheated steam.

Moreover, in the heating cooker of one embodiment,
The heater energization control unit turns off the energization of the heater when the object to be heated in the heating chamber is heated by the steam from the steam injection pipe, while the temperature of the object to be heated in the heating chamber is increased. When heating with superheated steam from the device, the energization to the heater is turned on,
When the object to be heated in the heating chamber is heated by the steam from the steam injection pipe, the fan drive control unit turns off the energization to the drive motor, while the object to be heated in the heating chamber is heated to the steam riser. When heating with superheated steam from the heating device, the drive motor is turned on.

  According to this embodiment, only the on / off control of the energization to the heater by the heater energization control unit and the on / off control of the energization to the drive motor by the fan drive control unit are performed. For example, it is possible to easily switch between a mode in which a relatively small volume of food is steamed, boiled, and warmed by steam at 80 ° C. to 90 ° C., and a mode in which meat chunks and the like are heated by superheated steam at 100 ° C. or higher.

Moreover, in the heating cooker of one embodiment,
A steam suction ejector that sucks the steam generated by the steam generator and blows it out to each steam supply port in the steam temperature raising device is provided.

  According to this embodiment, the steam that has passed through the steam injection pipe is ejected at a very high speed from the opening at the other end of the steam injection pipe by the function of the steam suction ejector. Accordingly, it is possible to more effectively spray steam onto the object to be heated.

Moreover, in the heating cooker of one embodiment,
One of the steam outlets provided in the ceiling of the heating chamber is provided in the approximate center of the ceiling,
The opening at the other end of the steam injection pipe is disposed so as to be located in the steam outlet provided at the approximate center of the ceiling,
The diameter of the steam outlet provided at substantially the center of the ceiling in the heating chamber is larger than the outer diameter of the opening at the other end of the steam injection pipe.

  According to this embodiment, when the object to be heated is heated by non-superheated steam, the steam from the steam injection pipe is supplied from the specific steam outlet provided at the approximate center of the ceiling in the heating chamber. It is reliably sprayed on the object to be heated placed in the approximate center of the heating chamber. Therefore, for example, one cup of rice can be heated in a short time.

  On the other hand, when the object to be heated is heated by superheated steam, the steam supplied from the steam injection pipe into the heating chamber through the specific steam outlet in the ceiling of the heating chamber is the suction force of the fan. Thus, the steam is efficiently pulled back from the specific steam outlet larger than the opening of the steam injection pipe into the steam temperature raising device.

Moreover, in the heating cooker of one embodiment,
One end of the steam injection pipe communicated with the steam generating device is connected to any one steam supply port of the steam heating device,
The steam injection pipe is disposed in the steam temperature raising device.

  According to this embodiment, the steam from the steam generator is supplied to the heating chamber through a short and simple route passing through the steam temperature raising device.

Moreover, in the heating cooker of one embodiment,
The other end of the steam injection pipe is arranged so that the projection of the opening on the fan is located at the suction part of the fan,
A hole is provided at a position where the suction force of the fan is most received in the steam injection pipe and at a position facing the fan.

  According to this embodiment, when the energization to the heater is turned on by the heater energization control unit and the energization to the drive motor is turned on by the fan drive control unit, the steam generating device ejects the steam injection. The steam supplied to the pipe is sucked into the steam temperature raising device by a suction force of the fan from a hole formed in the other end portion of the steam injection pipe.

  Therefore, compared with the case where the steam once supplied into the heating chamber from the steam injection pipe through the ceiling steam outlet is pulled back from the steam outlet into the steam heating apparatus, the steam injection pipe Can be taken in the steam heating device efficiently and in large quantities. That is, a larger amount of superheated steam can be efficiently ejected onto the object to be heated.

Moreover, in the heating cooker of one embodiment,
A damper for closing and opening the steam supply port of the steam heating device;
An opening / closing control unit for controlling the opening / closing operation of the damper.

Moreover, in the heating cooker of one embodiment,
The opening / closing control unit closes the damper when the object to be heated in the heating chamber is heated by the steam from the steam injection pipe, while overheating the object to be heated in the heating chamber from the steam heating device. In the case of heating with steam, the damper is opened.

  According to these embodiments, when the object to be heated is heated by the non-superheated steam, the damper is closed by the opening / closing control unit, so that it is possible to eliminate the blowing of steam that is not directly related to the heating of the object to be heated. Thus, it is possible to efficiently heat the object to be heated and to reduce energy loss.

Moreover, in the heating cooker of one embodiment,
A circulation path for circulating the steam generated by the steam generator, the steam temperature raising device and the heating chamber;
A circulation fan disposed in the circulation path;
A circulation fan drive control unit for turning on and off the energization of the circulation fan drive motor,
When the object to be heated in the heating chamber is heated by the steam from the steam injection pipe, the circulation fan drive control unit turns on the energization to the drive motor of the circulation fan while the object to be heated in the heating chamber is heated. When an object is heated by superheated steam from the steam temperature raising device, the energization to the drive motor of the circulation fan is turned off.

  According to this embodiment, when the object to be heated is heated by the superheated steam, since the circulation fan is stopped, the steam generated by the steam generator is self-pressured to generate the steam injection pipe. The temperature is raised by being sucked into the steam temperature raising device by the fan driven and driven.

  As is apparent from the above, the heating cooker according to the present invention controls on / off of energization to the heater by the heater energization control unit, and controls on / off of energization to the drive motor by the fan drive control unit. By means of this, the concentrated injection in which the steam from the steam generator is directly injected onto the object to be heated in the heating chamber through the steam injection pipe, and the superheated steam obtained by heating the steam from the steam generator with the heater is blown out uniformly into the heating chamber The injection can be switched easily.

  Therefore, in the case of the concentrated injection, when the object to be heated is an aggregate of granular materials or linear objects, the granular materials or linear objects are heated by, for example, steam at 80 ° C. to 90 ° C. It can prevent that the surface of an object exceeds 100 degreeC directly. As a result, one bowl of rice can be heated to 60-70 ° C. in about 3 minutes.

  Further, if a hole is provided at a position where the fan suction force is most received in the steam injection pipe and at a position facing the fan, the steam supplied to the steam injection pipe is reduced during the concentrated injection. A large amount can be efficiently sucked into the steam heating device from the hole of the steam injection pipe by the suction force of the fan.

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

-1st Embodiment FIG. 1: is an external appearance perspective view in the heating cooker of this 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 air (including steam) in the heating chamber 20 from the suction port 25 and sends out air (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.

  In this way, the superheated steam from the steam temperature raising device 50 can be ejected from the ceiling steam outlet 55 and the side outlet 22 and efficiently collide with the heated object 90 placed on the rack 24. The heated object 90 is heated by the collision of 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 the cooking is finished, the control device 80 displays a cooking completion message on the operation panel 11 and further sounds a signal by a buzzer (not shown) provided on the operation panel 11. When a user who knows the end of cooking by these messages or 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 remove the object to be heated 90 from the heating chamber 20 without being exposed to steam.

  By the way, 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 condensation latent heat 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 temperature raising device 50 is devised as follows so that even a small amount of food such as a case where rice is heated or a food having a large lump surface area can be efficiently used. It can be heated.

  Hereinafter, the steam temperature raising device 50 which is a feature of this embodiment will be described in more detail with reference to FIG. 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. Further, a centrifugal fan 110 is provided at the center upper part in the dish-shaped case 51, and is rotated by a fan motor (not shown) disposed at the upper part outside the dish-shaped case 51. And on the ceiling panel 54 (refer to FIG. 3) in the center lower part in the dish-shaped case 51, a main body portion formed by bending a plate-like body into a circle having an outer diameter slightly larger than the outer diameter of the centrifugal fan 110, A barrier 113 is provided that includes a plate-like attachment portion for attaching and fixing the main body portion to the side wall 91 of the dish-shaped case 51. 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.

  6 and 7 are schematic longitudinal sectional views taken along the center line L of the dish-shaped case 51. FIG. 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 vapor injection pipe 111 is bent toward the heating chamber 20 at the substantially central portion of the recess 51a, and is very close to the inner surface of the lid member 54a of the dish-shaped case 51 constituting a part of the ceiling panel 54. Is located. 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, and there is a gap between the opening 111a of the steam injection pipe 111 and the hole 112 of the lid member 54a. Is provided.

  The steam supply ports 95A and 95C of the steam supply pipes 94A and 94C are provided with dampers (not shown) for opening and closing the steam supply ports 95A and 95C. The specific configurations of the damper and the opening / closing means are not particularly limited.

  The centrifugal fan 110 is disposed such that the center of rotation is located directly above the hole 112. The centrifugal fan 110 has a function of sucking air from the periphery (center portion) of the rotation shaft and releasing it to the periphery by being driven to rotate. Note that the centrifugal fan 110 is not particularly limited as long as it has a function of sucking from the central portion and discharging it to the surroundings.

  The steam temperature raising device 50 having the above configuration operates as follows.

(a) Steaming / warming mode This “steaming / warming mode” is a mode in which a relatively small volume of food is steamed, boiled, and warmed using non-superheated steam. Therefore, when heating the above-mentioned bowl of rice bowl or a plate of fried noodles, this “steaming warming mode” is performed. The operation of the steam temperature raising device 50 described below is not particularly described, but is executed under the control of the control device 80 when the user selects the “steaming / warming mode mode”, for example.

  In this case, the energization of the steam heater 52 is turned off, the blower fan 28 is driven, the centrifugal fan 110 is stopped, and the steam supply ports 95A and 95C are closed by the damper. 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, as shown in FIG. 6, the steam generated in the pot 41 of the steam generating device 40 is quickly supplied to the steam supply pipe 94 </ b> B of the steam heating device 50 through the third pipe 63 by the function of the steam suction ejector 44. To be supplied. In this way, 80 ° C. to 90 ° C. steam (non-superheated steam) supplied from the steam supply pipe 94B is ejected vigorously from the opening 111a of the steam injection pipe 111, and is one serving as the object to be heated 90. It is sprayed on the rice.

  As described above, in the present embodiment, in the “steaming warming mode”, steam of 80 ° C. to 90 ° C. from the steam generator 40 is directly injected to the article to be heated 90 instead of superheated steam. ing. Therefore, for example, the surface of the rice grain can be prevented from directly exceeding 100 ° C., and the steam can be efficiently condensed on the surface of the rice grain. The supply of condensation latent heat to the rice grain and the condensed water ( Infiltration of hot water) can be performed efficiently. As a result, in about 3 minutes, one cup of rice can be heated to 60 ° C. to 70 ° C., which is said to be an appropriate temperature. That is, according to the present embodiment, the heating time of a bowl of rice, which took about 7 minutes with only superheated steam, is greatly combined with the fact that the heating time of the steam heater 52 is unnecessary. It can be shortened.

  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 "one cup or one plate". 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 stopped, the centrifugal fan 110 is driven, and the steam supply ports 95A and 95C are 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 is heated to generate superheated steam.

  As shown in FIG. 7, the steam generated in the pot 41 of the steam generator 40 flows into the dish-shaped case 51 through the steam supply ports 95 </ b> A and 95 </ b> C. Further, it flows into the steam injection pipe 111 through the steam supply port 95B. In this case, since the blower fan 28 is stopped, the steam suction ejector 44 does not function, and the steam from the pot 41 flows into the dish-shaped case 51 and the steam injection pipe 111 under its own pressure. 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.

  On the other hand, the steam supplied from the steam supply port 95 </ b> B to the steam injection pipe 111 is blown into the heating chamber 20 from the opening 111 a without being heated by the steam heater 52. However, as described above, since the steam suction ejector 44 is not functioning, the steam blown out from the opening 111a has no momentum, and is indicated by an arrow D by the centrifugal fan 110 that sucks air from the center and discharges it to the surroundings. In this way, the air is immediately sucked from the hole 112 of the lid member 54a and discharged from the periphery of the centrifugal fan 110 into the dish-shaped case 51 as indicated by arrows E and F. Then, in the dish-shaped case 51, it is heated by the steam heater 52. In that case, a circular barrier 113 slightly larger than the outer diameter of the centrifugal fan 110 is provided below the centrifugal fan 110. Therefore, the vapor sucked from the hole 112 is prevented from diffusing throughout the dish-shaped case 51 and is efficiently sucked by the centrifugal fan 110.

  Thus, the steam from the steam supply ports 95A and 95C and the steam blown from the steam injection pipe 111 and sucked by the centrifugal fan 110 become superheated steam, and the central portion of the lid member 54a is blown by the centrifugal fan 110. It is ejected into the heating chamber 20 from the ceiling steam outlet 55 other than (mainly the hole 112). Further, the superheated steam blown into the heating chamber 20 is sucked again from the central portion of the lid member 54a by the suction force of the centrifugal fan 110, as shown by arrows G and H, and enters the dish-shaped case 51. It is discharged and heated by the steam heater 52. Thereafter, by repeating this circulation, the superheated steam in the heating chamber 20 becomes 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 a result, the superheated steam supplied from the ceiling side of the heating chamber 20 toward the central heated object 90 side wraps the heated object 90 from above. On the other hand, the superheated steam supplied from the left and right side surfaces of the heating chamber 20 collides with the receiving tray 21 and then wraps the heated object 90 from below the heated object 90. Then, both superheated steams merge, rise toward the vicinity of the hole 112 of the lid member 54a, and are sucked into the dish-shaped case 51 together with the steam from the steam injection pipe 111 from the hole 112 of the lid member 54a. .

  As described above, in the “water oven mode”, superheated steam of 100 ° C. or more is jetted into the heating chamber 20. Therefore, by giving the condensing latent heat of superheated steam to the object to be heated 90, and by condensing 100 ° C. condensed water (hot water) into the object to be heated 90 and increasing the internal temperature, for example, Even for the object to be heated 90 having a large surface area, cooking without any spots and good finish is performed.

(c) Oven Mode This “oven mode” is a conventional mode in which food is heated without using steam. This cooking mode is executed under the control of the control device 80, for example, when the user selects the menu "oven mode".

  In this case, the energization to the steam generating heater 42 is turned off, the energization to the steam heater 52 is turned on, the blower fan 28 is stopped, the centrifugal fan 110 is driven, and the steam supply ports 95A and 95C are closed. Is done. After that, the object to be heated 90 is placed on the rack 24 by the user. In this mode, since the steam generating heater 42 and the blower fan 28 are stopped, the steam generating device 40 and the steam suction ejector 44 are not functioning at all.

  The centrifugal fan 110 sucks normal temperature air in the heating chamber 20 from the hole 112 of the lid member 54 a and discharges it from the periphery of the centrifugal fan 110 into the dish-shaped case 51. Then, it is heated by the steam heater 52 in the dish-shaped case 51. Thus, the heated air in the dish-shaped case 51 is jetted into the heating chamber 20 from the ceiling steam blower outlet 55 other than the central portion (mainly the hole 112) of the lid member 54a by the blowout output of the centrifugal fan 110. . Further, the superheated steam blown into the heating chamber 20 is sucked again from the center of the lid member 54a and released into the dish-shaped case 51 by the suction force of the centrifugal fan 110, as indicated by arrows G and H. And heated by the steam heater 52. Thereafter, by repeating this circulation, the air in the heating chamber 20 becomes a temperature corresponding to cooking.

  Thus, in the “oven mode”, the object to be heated 90 is heated not by steam but by air heated by the steam heater 52. Therefore, the same cooking as a conventional electric oven can be performed.

  As above. According to the present embodiment, the steam generating heater 42 is turned on / off, the steam heater 52 is turned on / off, the blower fan 28 is driven / stopped, the centrifugal fan 110 is driven / stopped, and the steam supply ports 95A, 95C are turned on. With a simple operation that only controls opening and closing, a relatively small volume of food is steamed, boiled, and warmed with non-superheated steam, and a “water oven mode” that heats the food with superheated steam. It is possible to switch to “oven mode” in which food is heated without using steam.

  The gap between the opening 111a of the steam injection pipe 111 and the hole 112 and the distance between the opening 111a of the steam injection pipe 111 and the lid member 54a are determined by the amount of steam blown from the opening 111a into the heating chamber 20. And suction of the steam blown out from the opening 111a into the dish-shaped case 51 with its own pressure can be performed efficiently.

  Moreover, in the said embodiment, the said vapor | steam injection pipe 111 is comprised by making the said other end bend toward the heating chamber 20 side. However, the present invention is not limited to this. For example, the other end of the steam injection pipe 111 that is not connected to the steam supply pipe 94 </ b> B extends to the substantially central portion of the dish-shaped case 51 and is opened. Further, an air conditioning plate that is opposed to the opening of the steam injection pipe 111 and is inclined at approximately 45 degrees with respect to the lid member 54a is provided. And it is also possible to change the injection direction of the vapor | steam injected from the said opening to the direction which goes to the hole 112 of the cover member 54a with the said air conditioning board.

  Further, in the above embodiment, in the “steaming warming mode”, the steam heater 52 is turned off so as not to be energized. However, the steam heater 52 may be energized with very weak power (may be intermittent) so as not to be heated substantially.

  Moreover, in the said embodiment, although the said steam injection pipe 111 is provided in the dish-shaped case 51 of the steam temperature rising apparatus 50, it is not necessarily required. For example, the steam from the steam suction ejector 44 may be guided directly into the heating chamber 20 by a steam injection pipe different from the third pipe 63. However, in that case, it is necessary to provide a damper for opening and closing the steam supply port 95B in the steam supply port 95B.

Second Embodiment FIGS. 8 and 9 are schematic longitudinal sectional views taken along the center line L of the dish-shaped case 51 in the first embodiment. In the present embodiment, as in the case of the first embodiment, one end of the steam injection pipe 115 is connected to the central steam supply pipe 94B among the three steam supply pipes 94A, 94B, 94C. ing. The steam injection tube 115 is the same as the steam injection tube 111 in the first embodiment except that a hole 116 is provided at a position above the opening 115a at the other end and facing the rotation center of the centrifugal fan 110. It is the same. The configuration other than the steam injection pipe 115 is the same as that in the case of the first embodiment.

  In the case of the “water oven mode”, as shown in FIG. 9, the steam flowing into the steam injection pipe 115 through the steam supply port 95B has no momentum because the steam suction ejector 44 does not function. As described above, the hole 116 is provided above the opening 115 a at the other end of the steam injection pipe 115. Therefore, the steam that has flowed to the vicinity of the hole 116 of the steam injection pipe 115 is sucked into the dish-shaped case 51 from the hole 116 as indicated by the arrow J by the suction force of the centrifugal fan 110, and is indicated by the arrows K and M. As shown, it is discharged from the periphery of the centrifugal fan 110. Then, the superheated steam generated by heating in the dish-shaped case 51 is jetted into the heating chamber 20 from the ceiling steam blower outlet 55 other than the central part of the lid member 54a by the blowout output of the centrifugal fan 110. Further, the superheated steam blown into the heating chamber 20 is sucked from the holes 112 and 116 of the lid member 54a by the suction force of the centrifugal fan 110, as shown by the arrows N and P, and the inside of the dish-shaped case 51. And heated by the steam heater 52. Thereafter, this circulation is repeated.

  Thus, in the present embodiment, the hole 116 is provided facing the centrifugal fan 110 at a position where the suction force of the centrifugal fan 110 is most easily received in the steam injection pipe 115. Therefore, as in the case of the first embodiment, the steam injection is performed as compared with the case where the steam once blown into the heating chamber 20 from the opening 111a of the steam injection pipe 111 is sucked from the hole 112 of the lid member 54a. A large amount of steam from the pipe 115 can be efficiently taken into the dish-shaped case 51. By grinding, a larger amount of superheated steam can be efficiently supplied to the object 90 to be heated.

  In the “steaming warming mode”, the steam suction ejector 44 is functioning and the centrifugal fan 110 is stopped. Therefore, the steam supplied vigorously from the steam supply port 95B to the steam injection pipe 115 hardly leaks from the hole 116 and is jetted into the heating chamber 20 from the opening 115a without any trouble. Furthermore, it goes without saying that the “oven mode” can be executed without any problem.

  In each of the above embodiments, the centrifugal fan 110 may be directly driven by, for example, a drive motor installed on the dish-shaped case 51, or may be driven via a transmission mechanism such as a pulley or a gear. There is no problem.

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 schematic diagram at the time of the steam warming mode along the centerline L in FIG. It is a longitudinal cross-sectional schematic diagram at the time of the water oven mode along the centerline L in FIG. It is a longitudinal cross-sectional schematic diagram at the time of the steaming warming mode along the centerline L in the heating cooker different from FIG. It is a longitudinal cross-sectional schematic diagram at the time of the water oven mode in FIG.

Explanation of symbols

1 ... Heat cooker,
11 ... Control panel,
20 ... heating chamber,
22 ... Side steam outlet,
23 ... steam supply passage,
30 ... Water tank,
35 ... pump,
40 ... steam generator,
42 ... steam generating heater,
44 ... Vapor suction ejector,
50 ... Steam temperature raising device,
51 ... Dish-shaped case,
51a ... recess,
52 ... Steam heater,
60 ... External circuit,
80 ... control device,
94A, 94B, 94C ... steam supply pipe,
95A, 95B, 95C ... Steam supply port,
110: Centrifugal fan,
111, 115 ... steam injection pipe,
111a, 115a ... opening,
112, 116 ... holes,
113: Barrier.

Claims (9)

A steam generator for generating steam;
A steam temperature raising device that generates the superheated steam by raising the temperature of the steam that is generated by the steam generator and supplied from a plurality of steam supply ports by a heater;
A plurality of steam outlets are provided on the ceiling, supplied from the steam temperature raising device, and a heating chamber for heating an object to be heated by superheated steam blown from the steam outlets;
One end communicates with the steam generator, the other end is bent toward the heating chamber, and the opening at the other end is provided on the ceiling with the projection of the opening onto the ceiling of the heating chamber. A steam injection pipe disposed so as to be located in the steam outlet;
A heater energization control unit for turning on / off the energization of the heater;
A fan that is provided in the steam temperature raising device and discharges the gas sucked from the center from the surroundings,
A fan drive control unit for turning on and off the energization of the fan drive motor,
The steam temperature raising device and the heating chamber are disposed adjacent to each other via the ceiling of the heating chamber, and a steam outlet provided in the ceiling serves as a supply port for steam from the steam temperature raising device. And
A heating cooker characterized in that the object to be heated in the heating chamber can also be heated by steam from the steam spray pipe. The heating cooker according to claim 1, wherein
The heater energization control unit turns off the energization of the heater when the object to be heated in the heating chamber is heated by the steam from the steam injection pipe, while the temperature of the object to be heated in the heating chamber is increased. When heating with superheated steam from the device, the energization to the heater is turned on,
When the object to be heated in the heating chamber is heated by the steam from the steam injection pipe, the fan drive control unit turns off the energization to the drive motor, while the object to be heated in the heating chamber is heated to the steam riser. A heating cooker characterized in that energization of the drive motor is turned on when heating with superheated steam from a temperature device. The heating cooker according to claim 1, wherein
A cooking device comprising: a steam suction ejector that sucks the steam generated by the steam generator and blows it out to each steam supply port in the steam temperature raising device. The heating cooker according to claim 1, wherein
One of the steam outlets provided in the ceiling of the heating chamber is provided in the approximate center of the ceiling,
The opening at the other end of the steam injection pipe is disposed so as to be located in the steam outlet provided at the approximate center of the ceiling,
The cooking device according to claim 1, wherein a diameter of the steam outlet provided at a substantially center of the ceiling in the heating chamber is larger than an outer diameter of the opening at the other end of the steam injection pipe. The heating cooker according to claim 1, wherein
One end of the steam injection pipe communicated with the steam generating device is connected to any one steam supply port of the steam heating device,
The steam cooker, wherein the steam injection pipe is disposed in the steam temperature raising device. The heating cooker according to claim 1, wherein
The other end of the steam injection pipe is arranged so that the projection of the opening on the fan is located at the suction part of the fan,
A heating cooker characterized in that a hole is provided at a position where the suction force of the fan is most received in the steam spray pipe and at a position facing the fan. The heating cooker according to claim 1, wherein
A damper for closing and opening the steam supply port of the steam heating device;
A heating cooker comprising: an opening / closing control unit for controlling an opening / closing operation of the damper. The heating cooker according to claim 7, wherein
The opening / closing control unit closes the damper when the object to be heated in the heating chamber is heated by the steam from the steam injection pipe, while overheating the object to be heated in the heating chamber from the steam heating device. A heating cooker characterized in that the damper is opened when heated by steam. The cooking device according to claim 2,
A circulation path for circulating the steam generated by the steam generator, the steam temperature raising device and the heating chamber;
A circulation fan disposed in the circulation path;
A circulation fan drive control unit for turning on and off the energization of the circulation fan drive motor,
When the object to be heated in the heating chamber is heated by the steam from the steam injection pipe, the circulation fan drive control unit turns on the energization to the drive motor of the circulation fan while the object to be heated in the heating chamber is heated. A heating cooker characterized in that when an object is heated by superheated steam from the steam temperature raising device, the energization to the drive motor of the circulation fan is turned off.

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