JP3868465B1 - Cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently heat food when heated with non-superheated steam.
SOLUTION: The distance between the inner surface of the suction port of the outer nozzle 46B connected to the steam injection pipe 101 and the outer surface of the blowout port of the inner nozzle 45B is set so that the suction ports of the other outer nozzles 46A and 46C and the inner nozzles 45A and 45C. It is made larger than the interval with the air outlet. In the “steaming warming mode”, the inlets of the inner nozzles 45A and 45C on both sides are closed, while the inlet of the inner nozzle 45B communicating with the steam injection pipe 101 is opened. Thus, by reducing the amount of steam supplied to the outer nozzles 46A and 46C through the distance between the inner surfaces of the outer nozzles 46A and 46C and the tips of the inner nozzles 45A and 45C, the inner surfaces of the outer nozzle 46B and the inner nozzle 45B are reduced. The amount of non-superheated steam supplied to the steam injection pipe 101 through the interval with the tip is increased. Thus, the food is efficiently heated with non-superheated steam.
[Selection] Figure 5

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 device that jets steam into a cooking case as a cooking device that uses steam to cook an object to be heated such as food (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.
Utility registration No. 2515033

  Then, the subject of this invention is providing the heating cooker which can be heated efficiently, when heating food 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 steam temperature raising device for raising the temperature of the steam from the steam generator;
A heating chamber for heating an object to be heated by steam supplied from the steam generator or the steam temperature raising device;
An outer nozzle having a blower outlet and a suction port; and an inner nozzle having a blower outlet and a blower port inserted into the suction port of the outer nozzle, and the steam generated by the steam generator from the suction port. A plurality of vapor suction ejectors that are sucked out and blown out from the outlet of the outer nozzle by the gas blown from the inlet,
A steam injection pipe that is connected to any one of the plurality of steam suction ejectors and that guides the steam from the outlet of the outer nozzle to the heating chamber and injects the steam into the heating chamber;
A steam supply pipe connected to the steam suction ejector not connected to the steam injection pipe, and supplying steam from the outlet of the outer nozzle to the steam temperature raising device;
The distance between the inner surface of the suction port of the outer nozzle and the outer surface of the blowout port of the inner nozzle in the steam suction ejector connected to the steam injection pipe is determined by the distance between the outer nozzle of the steam suction ejector connected to the steam supply pipe. The distance between the inner surface of the suction port and the outer surface of the air outlet of the inner nozzle is larger.

  According to the above configuration, when the object to be heated in the heating chamber is heated by the non-superheated steam injected from the steam injection pipe, suction is performed from the suction port of the steam suction ejector connected to the steam injection pipe. The amount of steam generated from the steam generator can be made larger than the amount of steam from the steam generator sucked from the suction port of the other steam suction ejector. Therefore, the amount of non-superheated steam necessary for heating can be increased, and the object to be heated can be efficiently heated with the non-superheated steam.

Moreover, in the heating cooker of one embodiment,
The steam suction ejector connected to the steam injection pipe is a steam suction ejector disposed at a central portion of the plurality of steam suction ejectors.

  The injection port of the steam injection pipe that injects the steam into the heating chamber is located at the center of the heating chamber. According to this embodiment, the steam injection pipe is connected to the steam suction ejector disposed at the center of the plurality of steam suction ejectors. Therefore, the steam can be efficiently supplied to the heating chamber with a simple configuration by shortening the length of the steam injection pipe, compared to the case where the steam injection pipe is connected to another steam suction ejector.

Moreover, in the heating cooker of one embodiment,
An opening provided in the heating chamber;
A circulation fan is provided, and a circulation path connected to the inlet of the inner nozzle and the opening of the heating chamber in each of the steam suction ejectors,
The area of the outlet of the inner nozzle in the steam suction ejector connected to the steam supply pipe is made larger than the area of the outlet of the inner nozzle in the steam suction ejector connected to the steam injection pipe.

  According to this embodiment, the absolute amount of gas blown from the inner nozzle in the steam suction ejector connected to the steam supply pipe is set to the absolute amount of gas blown from the inner nozzle in the other steam suction ejectors. It can be made larger than the blowout amount. Therefore, the inner nozzle connected to the steam supply pipe → the steam supply pipe → the steam temperature raising device → the heating chamber → the opening of the heating chamber → the circulation path → the gas through the inner nozzle connected to the steam supply pipe The circulation efficiency of the circulation can be increased. As a result, the heating chamber can be preheated in a short time by increasing the heating rate of the heating chamber.

Moreover, in the heating cooker of one embodiment,
The steam heating device has a steam heater,
At least a part of the steam heater is disposed near the supply port of the steam supply pipe so as to face the supply port.

  According to this embodiment, the gas supplied from the steam supply pipe to the steam temperature raising device is raised by the steam heater facing the supply port of the steam supply pipe before the temperature decreases. Be warmed. Therefore, the temperature of the gas can be increased efficiently, and the heating rate of the heating chamber can be further increased.

  As is apparent from the above, the cooking device of the present invention is configured so that the distance between the inner surface of the suction port of the outer nozzle and the outer surface of the outlet port of the inner nozzle in the steam suction ejector connected to the steam injection pipe is different from that of the other steam suction. Since the interval between the inner surface of the suction port of the outer nozzle and the outer surface of the outlet of the inner nozzle in the ejector is larger, when heating the object to be heated in the heating chamber by the non-superheated steam sprayed from the steam spray pipe, The amount of steam from the steam generator sucked from the suction port of the steam suction ejector connected to the steam injection pipe is changed to the amount of steam from the steam generator sucked from the suction port of the other steam suction ejector. Can be more. Therefore, the amount of non-superheated steam necessary for heating can be increased, and the object to be heated can be efficiently heated with the non-superheated steam.

  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 at 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 with the exhaust passage 67 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 the surface of the object to be heated 90 is condensed. 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.

  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 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. 5 is a plan view showing a connection relationship between the steam temperature raising device 50 and the steam suction ejector 44. In the steam temperature raising device 50, a steam heater 52, which is a sheathed heater with a large pipe diameter of large power (1000 W), is disposed in a dish-shaped case 51 having a concave portion 51a having a substantially square planar shape. The opening of the recess 51 a of the dish-shaped case 51 is covered with a lid member 54 a of the dish-shaped case 51 that constitutes a part of the metal ceiling panel 54 provided on the ceiling surface of the heating chamber 20. In FIG. 5, the steam heater 52 is expressed in a simplified manner.

  Steam supply pipes 94A, 94B, 94C are connected to the side wall 91 of the dish-shaped case 51. The side wall 91 to which the steam supply pipes 94A, 94B, 94C are connected is the back side of the main heating cooker 1. As will be described in detail later, 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. Steam supply passages 23A1, 23A2, and 23A3 and steam supply passages 23B1, 23B2, and 23B3 are connected to the side walls 92 and 93 that are adjacent to the side wall 91 of the dish-shaped case 51 and that face each other.

  Further, in the recess 51 a of the dish-shaped case 51, one end of a steam injection pipe 101 arranged horizontally along the center line of the dish-shaped case 51 is connected to the steam supply pipe 94 </ b> B located at the center. . The other end of the steam injection pipe 101 is bent toward the heating chamber 20 at the substantially central portion of the recess 51a, and is positioned in the vicinity of the inner surface of the lid member 54a. Further, the lid member 54a is provided with a hole 102 so as to surround the opening 101a at the other end of the steam injection pipe 101.

  Outer nozzles 46A, 46B, 46C constituting the steam suction ejector 44 are connected to the outer ends of the steam supply pipes 94A, 94B, 94C. Further, the outlets of the inner nozzles 45A, 45B, 45C are inserted into the conical suction ports of the outer nozzles 46A, 46B, 46C. The inlets of the inner nozzles 45A, 45B, and 45C are opened and closed by dampers 104A, 104B, and 104C that are driven to open and close by the damper motor 103, thereby functioning as the circulation path that functions as the first pipe 61 and the second pipe 62. It is possible to communicate with the circulation duct 105. Further, the fan casing 26 communicating with the circulation duct 105 accommodates a blower fan 28 as the circulation fan that is rotationally driven by the blower motor 106. The fan casing 26 communicates with the heating chamber 20 through the suction port 25 as shown in FIG.

  In the present embodiment, the damper 68 that opens and closes the exhaust passage 67 is also driven to open and close by the damper motor 103, and the steam in the circulation duct 105 is discharged from the exhaust duct 65 through the exhaust passage 67. It can be released to the outside.

  Although not particularly mentioned in the above description, FIG. 5 is a state in which the inside of the steam supply passage 23, the steam injection pipe 101, the outer nozzle 46, and the inner nozzle 45 is cut along a plane passing through the central axes so that the inside can be seen. Is shown.

  FIG. 6 is a longitudinal sectional view of the vapor suction ejector 44 and the circulation duct 105 in FIG. FIG. 6A is a longitudinal sectional view including the central axes of the outer nozzle 46C and the inner nozzle 45C in FIG. FIG. 6B is a longitudinal sectional view including the central axes of the outer nozzle 46B and the inner nozzle 45B in FIG. FIG. 6C is a longitudinal sectional view including the central axes of the outer nozzle 46A and the inner nozzle 45A in FIG. FIG. 6D is a longitudinal sectional view including the central axis of the damper 68 in FIG. As can be seen from FIGS. 6 (a) to 6 (c), the outer nozzles 46A, 46B, and 46C communicate with the pot 41 of the steam generator 40 so that the steam generated in the pot 41 is supplied. It has become.

  In the above configuration, the outer nozzles 46A, 46B, 46C and the inner nozzles 45A, 45B, 45C constituting the steam suction ejector 44 have a conical suction port in the center outer nozzle 46B connected to the steam injection pipe 101. The distance 107B between the inner surface of the inner nozzle 45B and the outer surface of the blower outlet of the inner nozzle 45B is set so that the inner surface of the suction port and the inner nozzles 45A, 45C that are conical in the other outer nozzles 46A, 46C not connected to the steam injection pipe 101 It is larger than the distances 107A and 107C from the outer surface of the outlet. Furthermore, the area of the air outlets in the inner nozzles 45A and 45C on both sides that are not connected to the steam injection pipe 101 is larger than the area of the air outlet in the central inner nozzle 45B.

  The steam injection pipe 101 is disposed along the center line of the dish-shaped case 51 and connected to the outer nozzle 46B. Therefore, the length of the steam injection pipe 101 can be made shorter than when connecting to the outer nozzles 46 </ b> A and 46 </ b> C on both sides, and the steam heater 52 can be disposed on the center line of the dish-shaped case 51. At that time, as shown in FIG. 5, both end portions of the steam heater 52 are bent in a direction perpendicular to the center line, and the supply ports near the supply ports of the steam supply pipes 94A and 94C on both sides are connected to the supply ports. They are located opposite each other.

  Hereinafter, operations of the steam heating device 50 and the steam suction ejector 44 having the above-described configuration in the “steaming warming mode” in which a small amount of food is steamed, boiled, and warmed using non-superheated steam from the steam injection pipe 101 will be described. . 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 executed under the control of the control device 80, for example, when the user selects the “steaming / warming mode”.

  In the “steaming / warming mode”, the energization of the steam heater 52 is turned off, the blower fan 28 is driven, and communicates with the steam supply pipes 94A and 94C on both sides as shown in FIGS. The blowing ports of the inner nozzles 45A and 45C are closed by the dampers 104A and 104C, and the blowing port of the inner nozzle 45B communicating with the steam injection pipe 101 is opened by the damper 104B. After that, the user places, for example, a bowl filled with rice on the rack 24 immediately below the opening 101a of the steam injection pipe 101. And cooking is performed by the procedure as described above. In this case, since the steam heater 52 is not energized, the gas supplied to the steam injection pipe 101 is not heated.

  Then, in FIG. 6B, the steam generated in the pot 41 of the steam generator 40 is steamed at high speed via the steam supply pipe 94B by the functions of the inner nozzle 45B and the outer nozzle 46B in the steam suction ejector 44. It is supplied to the injection pipe 101. In this way, the steam (non-superheated steam) of 80 ° C. to 90 ° C. supplied to the steam injection pipe 101 is ejected vigorously from the opening 101a to the bottom of the heated object 90 serving as a cup of rice. It is.

  In that case, as described above, the gap 107B between the inner surface of the suction port of the central outer nozzle 46B connected to the steam injection tube 101 and the outer surface of the outlet port of the inner nozzle 45B is connected to the steam injection tube 101. The distances 107A and 107C between the inner surfaces of the suction ports of the other outer nozzles 46A and 46C and the outer surfaces of the outlets of the inner nozzles 45A and 45C are larger. Therefore, the amount of steam supplied from the pot 41 of the steam generating device 40 to the outer nozzle 46B through the interval 107B is made larger than the amount of steam supplied to the outer nozzles 46A, 46C through the intervals 107A, 107C. be able to.

  In addition, the inlets of the inner nozzles 45A and 45C communicating with the steam supply pipes 94A and 94C on both sides are closed by dampers 104A and 104C. Therefore, the suction force from the intervals 107A and 107C, which are actual suction ports to the outer nozzles 46A and 46C, is reduced, and the amount of steam supplied to the outer nozzles 46A and 46C through the intervals 107A and 107C is further reduced. Therefore, the amount of non-superheated steam supplied to the steam injection pipe 101 through the interval 107B can be relatively increased.

  As described above, in the present embodiment, the distance 107B between the inner surface of the suction port of the central outer nozzle 46B connected to the steam injection pipe 101 and the outer surface of the outlet port of the inner nozzle 45B is set as another outer nozzle. The distances 107A and 107C between the inner surfaces of the suction ports 46A and 46C and the outer surfaces of the air outlets of the inner nozzles 45A and 45C are made larger. In the “steaming warming mode”, the inlets of the inner nozzles 45A, 45C communicating with the steam supply pipes 94A, 94C on both sides are closed by the dampers 104A, 104C, while the inner nozzle 45B communicating with the steam injection pipe 101 is closed. The inlet is opened.

  Therefore, the amount of steam supplied to the outer nozzles 46A and 46C through the intervals 107A and 107C can be reduced, and the amount of non-superheated steam supplied to the steam injection pipe 101 through the interval 107B can be increased. . In other words, according to the present embodiment, one cup of rice can be efficiently heated, and in about three minutes, one cup of rice can be heated to 60 ° C. to 70 ° C., which is said to be an appropriate temperature. is there.

  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.

  By the way, in the structure shown in FIG. 5 and FIG. 6, the outer diameter of the blower outlet in inner nozzle 45A, 45B, 45C is changed by making the inner diameter of the conical inlet in each said outer nozzle 46A, 46B, 46C the same. Thus, the interval 107B is made larger than the intervals 107A and 107C. However, the intervals 107A, 107B, and 107C may be set by changing the inner diameters of the outlets of the outer nozzles 46A, 46B, and 46C while making the outer diameters of the outlets of the inner nozzles 45A, 45B, and 45C the same. it can.

  However, in the present embodiment, the outer diameters of the outlets of the inner nozzles 45A, 45B, 45C are changed. The reason is as follows.

  In the “water oven mode” in which the food is heated using the superheated steam from the steam temperature raising device 50, the inner nozzle 45A communicating with the steam supply pipes 94A and 94C on both sides is contrary to the “steaming warming mode”. 45C is opened by dampers 104A and 104C, and the inlet of the inner nozzle 45B communicating with the steam injection pipe 101 is closed by the damper 104B. Then, prior to cooking, preheating is performed to supply superheated steam into the heating chamber 20 and raise the inside of the heating chamber 20 to a predetermined temperature. In that case, since the area of the outlets in the inner nozzles 45A, 45C on both sides not connected to the steam injection pipe 101 is larger than the area of the outlets in the central inner nozzle 45B, the steam supply pipes 94A, The absolute amount of the gas blow-out amount from the inner nozzles 45A and 45C communicating with the dish-shaped case 51 of the steam temperature raising device 50 through 94C can be increased. Accordingly, it is possible to increase the gas circulation efficiency in the circulation path of the inner nozzles 45A and 45C → the dish-shaped case 51 → the heating chamber 20 → the fan casing 26 → the circulation duct 105 → the inner nozzles 45A and 45C. Further, both end portions of the steam heater 52 are positioned in the vicinity of the supply ports of the steam supply pipes 94A and 94C on both sides so as to face the supply ports. As a result, the gas supplied from the steam supply pipes 94A and 94C can be heated before the temperature decreases, and the heating rate of the heating chamber 20 can be increased to perform preheating in a short time.

  In the present embodiment, the steam injection pipe 101 is connected to the outer nozzle 46B positioned at the center, but may be connected to the outer nozzles 46A and 46C positioned at both ends. However, in this case, since the opening 101a of the steam injection pipe 101 is desirably located at the approximate center of the heating chamber 20, the length of the steam injection pipe 101 becomes long. Therefore, it is difficult to dispose the steam heater 52 with respect to the center line of the dish-shaped case 51, and temperature spots may occur in the superheated steam in the dish-shaped case 51.

  In the present embodiment, three inner nozzles 45 and three outer nozzles 46 are provided, but it goes without saying that the number is not limited to “three”.

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 a top view which shows the connection relation of the steam temperature rising apparatus in FIG. 4, and a vapor | steam suction ejector. It is sectional drawing of the vapor | steam suction ejector and circulation duct in FIG.

Explanation of symbols

1 ... Heat cooker,
20 ... heating chamber,
23 ... steam supply passage,
26: Fan casing,
28 ... Blower fan,
40 ... steam generator,
44 ... Vapor suction ejector,
45A, 45B, 45C ... Inner nozzle,
46A, 46B, 46C ... outer nozzle,
50 ... Steam temperature raising device,
51 ... Dish-shaped case,
51a ... recess,
52 ... Steam heater,
60 ... External circuit,
65 ... exhaust duct,
68,104A, 104B, 104C ... Damper,
80 ... control device,
94A, 94B, 94C ... steam supply pipe,
101 ... steam injection pipe,
105 ... circulation duct,
107: Distance between the inner surface of the suction port of the outer nozzle and the outer surface of the outlet of the inner nozzle.

Claims (4)

A steam generator for generating steam;
A steam temperature raising device for raising the temperature of the steam from the steam generator;
A heating chamber for heating an object to be heated by steam supplied from the steam generator or the steam temperature raising device;
An outer nozzle having a blower outlet and a suction port; and an inner nozzle having a blower outlet and a blower port inserted into the suction port of the outer nozzle, and the steam generated by the steam generator from the suction port. A plurality of vapor suction ejectors that are sucked out and blown out from the outlet of the outer nozzle by the gas blown from the inlet,
A steam injection pipe that is connected to any one of the plurality of steam suction ejectors and that guides the steam from the outlet of the outer nozzle to the heating chamber and injects the steam into the heating chamber;
A steam supply pipe connected to the steam suction ejector not connected to the steam injection pipe, and supplying steam from the outlet of the outer nozzle to the steam temperature raising device;
The distance between the inner surface of the suction port of the outer nozzle and the outer surface of the blowout port of the inner nozzle in the steam suction ejector connected to the steam injection pipe is determined by the distance between the outer nozzle of the steam suction ejector connected to the steam supply pipe. A cooking device characterized by being larger than the distance between the inner surface of the suction port and the outer surface of the outlet of the inner nozzle. The heating cooker according to claim 1, wherein
The steam cooker, wherein the steam suction ejector connected to the steam injection pipe is a steam suction ejector disposed at a central portion of the plurality of steam suction ejectors. The heating cooker according to claim 1, wherein
An opening provided in the heating chamber;
A circulation fan is provided, and a circulation path connected to the inlet of the inner nozzle and the opening of the heating chamber in each of the steam suction ejectors,
The area of the outlet of the inner nozzle in the steam suction ejector connected to the steam supply pipe is made larger than the area of the outlet of the inner nozzle in the steam suction ejector connected to the steam injection pipe, To cook. The cooking device according to claim 3,
The steam heating device has a steam heater,
At least a part of the steam heater is disposed near the supply port of the steam supply pipe so as to face the supply port.

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