WO2007013419A1

WO2007013419A1 - Cooking device

Info

Publication number: WO2007013419A1
Application number: PCT/JP2006/314608
Authority: WO
Inventors: Kohichi Ishizaki; Shinya Ueda; Masahiro Nishijima
Original assignee: Sharp Kabushiki Kaisha
Priority date: 2005-07-28
Filing date: 2006-07-25
Publication date: 2007-02-01
Also published as: JP2007032962A; JP3868465B1

Abstract

The interval between the inner surface of the suction opening of an outer nozzle (46B) connected to a steam ejection pipe (101) and the outer surface of the blowout opening of an inner nozzle (45B) is set larger than the interval between the suction opening of each of other outer nozzles (46A, 46C) and the corresponding blowout opening of each of inner nozzles (45A, 45C). In a “steam warming mode,” the suction openings of the inner nozzles (45A, 45C) on both sides are closed and the suction opening of the inner nozzle (45B) communicating with the steam ejection pipe (101) is opened. The quantity of non-superheated steam supplied to the steam ejection pipe (101) through the interval between the inner surface of the outer nozzle (46B) and the head of the inner nozzle (45B) is increased by decreasing the quantity of steam supplied to the outer nozzles (46A, 46C) through the interval between the inner surface of each of the outer nozzles (46A, 46C) and the corresponding head of each of the inner nozzles (45A, 45C). Consequently, food is efficiently heated by non-superheated steam.

Description

Specification

Cooker

Technical field

[0001] The present invention relates to a cooking device that cooks food using steam.

Background art

[0002] Conventionally, there is a steam cooking device that injects steam into a cooking case as a cooking device that heats an object to be heated such as food using steam (for example, see Utility Registration No. 2515033). . In this steam cooking apparatus, a steam supply pipe having a steam injection nozzle section is arranged inside the cooking case, and the steam injection nozzle section force is also supplied to the steam from the steam generating means via the steam supply pipe. It is intended to be sprayed toward food.

[0003] However, the conventional steam cooking device has a steam supply pipe having a steam injection nozzle portion exposed inside the cooking case, and therefore, it is said that cleaning properties and usability are particularly poor as a domestic cooking utensil. There's a problem. In addition, the steam is only sprayed into the food tray by the steam injection nozzle part with holes arranged in a row at the bottom of one tube. For example, a small amount of steam is used to warm a bowl of rice. In the case of heating food, there is a problem that steam cannot be sprayed concentratedly on the food, the steam temperature is lowered, and heating efficiency is poor. Disclosure of the Invention

Problems to be solved by the invention

[0004] Therefore, an object of the present invention is to provide a heating cooker that can efficiently heat food when it is heated with non-superheated steam.

Means for solving the problem

[0005] In order to solve the above problems, a heating cooker of the present invention comprises:

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 the object to be heated by the steam supplied by the steam generator or the steam heating device; An outer nozzle having an air outlet and a suction port; and an inner nozzle having an air outlet and an air inlet inserted into the suction port of the outer nozzle, and the steam generated by the steam generator And a plurality of steam suction ejectors that are blown out from the outlet of the outer nozzle by a gas blown from the blow-in port and connected to any one of the plurality of steam suction ejectors. A steam injection pipe for introducing the steam from the outlet of the water nozzle into the heating chamber and injecting the steam into the heating chamber;

A steam supply pipe that is connected to the steam suction ejector that is not connected to the steam injection pipe, and that supplies steam at the outlet force of the outer nozzle to the steam temperature raising device;

With

The distance 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 steam suction I ejector connected to the steam injection pipe is the same as that in the steam suction I ejector connected to the steam supply pipe. The distance between the inner surface of the suction port of the outer nozzle and the outer surface of the air outlet of the inner nozzle is larger.

[0006] According to the above configuration, the non-superheated steam injected from the steam injection pipe is used to heat the object to be heated in the caloric heat chamber, so that the steam suction ejector connected to the steam injection pipe The amount of steam from the steam generator sucked from the suction port can be made larger than the amount of steam from the steam generator sucked from the suction ports of other steam suction projectors. Therefore, the amount of non-superheated steam necessary for heating can be increased, and the heated object can be efficiently heated with the non-superheated steam.

[0007] Also, in the heating cooker of one embodiment,

The steam suction ejector connected to the steam spray pipe is a steam suction bow I ejector disposed at the center of the plurality of steam suction ejectors.

[0008] An injection port of a steam injection pipe for injecting steam into the heating chamber is located in 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, it is higher than the case where the steam injection pipe is connected to other steam suction ejectors. It is possible to efficiently supply steam to the heating chamber with a simple configuration by shortening the length of the steam injection pipe.

[0009] Further, in the heating cooker of one embodiment,

An opening provided in the heating chamber;

A circulation fan connected to the inlet of the inner nozzle and the opening of the heating chamber in each of the steam suction ejectors;

With

The area of the outlet of the inner nozzle in the steam suction ejector connected to the steam supply pipe is larger than the area of the outlet of the inner nozzle in the steam suction ejector connected to the steam injection pipe.

[0010] According to this embodiment, the inner nozzle force in the steam suction ejector connected to the steam supply pipe is blown out from the inner nozzle in the other steam suction ejector. It can be made larger than the absolute amount of gas blown out. 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 inner nozzle connected to the steam supply pipe The circulation efficiency of gas 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.

[0011] 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.

[0012] According to this embodiment, the gas supplied from the steam supply pipe to the steam temperature raising device has the steam heating facing the supply port of the steam supply pipe before the temperature decreases. The temperature is raised by a heater. Therefore, the temperature of the gas can be increased efficiently, and the heating rate of the heating chamber can be further increased.

The invention's effect

As is clear from the above, the heating cooker of the present invention has a steam connected to the steam injection pipe. 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 suction ejector is greater than 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 other steam suction ejectors. When heating the object to be heated in the heating chamber with the non-superheated steam injected from the steam injection pipe, the suction suction of the steam suction ejector connected to the steam injection pipe is generated. The amount of steam generated by the apparatus 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. Brief Description of Drawings

FIG. 1 is an external perspective view of a heating cooker according to the present invention.

FIG. 2 is an external perspective view showing a state where the door of the cooking device shown in FIG. 1 is opened!

FIG. 3 is a schematic configuration diagram of the heating cooker shown in FIG. 1.

FIG. 4 is a control block diagram of the heating cooker shown in FIG. 1.

FIG. 5 is a plan view showing a connection relationship between the steam heating device and the steam suction ejector in FIG. 4.

6A is a cross-sectional view of the steam suction ejector and the circulation duct in FIG. 5. FIG.

FIG. 6B is a cross-sectional view of a steam suction ejector and a circulation duct different from those in FIG. 6A.

FIG. 6C is a cross-sectional view of a steam suction ejector and a circulation duct different from those in FIGS. 6A and 6B.

FIG. 6D is a cross-sectional view of a steam suction ejector and a circulation duct different from those in FIGS. 6A to 6C. BEST MODE FOR CARRYING OUT THE INVENTION

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

FIG. 1 is an external perspective view of the cooking device of the present embodiment. The heating cooker 1 is provided with an operation panel 11 at the upper part of the front of a rectangular parallelepiped cabinet 10, and a door 12 that rotates about the lower end side is provided below the operation panel 11 at the front of the cabinet 10. It is provided and roughly configured. A handle 13 is provided at the upper part of the door 12, and a window 14 made of heat-resistant glass 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, bottom and top surfaces of the heating chamber 20 are formed of stainless steel plates. Further, the door 12 is made of a stainless steel plate on the side facing the heating chamber 20 and has a V shape. A heat insulating material (not shown) is placed around the heating chamber 20 and inside the door 12 so that the inside of the heating chamber 20 and the outside are insulated.

[0018] 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 on the tray 21. Is installed. Furthermore, a substantially rectangular side surface steam outlet 22 (only one 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 water for steam, and steam generation that generates steam by evaporating water supplied from the water tank 30. The apparatus includes a device 40, a steam temperature raising device 50 that heats the steam from the steam generation device 40, and a control device 80 that controls operations of the steam generation 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.

In addition, the connection 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 branched from the first water supply pipe 31 and extending upward, and one end of the third water supply nozzle 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 nove 38 that branches off from the first water supply noise 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.

[0022] The third water supply pipe 33 has an L-shape that is bent substantially horizontally from a vertically arranged portion, and an auxiliary tank 39 is connected to the other end of the third water supply pipe 33. Yes. In addition, one end of a fourth water supply nozzle 34 is connected to the lower end of the auxiliary tank 39, and the fourth water supply The other end of the pipe 34 is connected to the lower end of the steam generator 40. Further, one end of a drain valve 70 is connected to a lower side than the connection point of the fourth water supply pipe 34 in the steam generating device 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 nose 71. Note that the upper part of the auxiliary tank 39 communicates with the atmosphere via an air release pipe 37 and an exhaust duct 65.

When the water tank 30 is connected to the inlet 31 a of the first water supply pipe 31, the water in the water tank 30 rises into the open air nose 37 until the water tank 30 reaches the same water level. At this time, the water level sensor pipe 38 connected to the water tank water level sensor 36 is sealed at the tip, so the water level does not rise, but the water level sensor pipe 38 is closed in accordance with the water level of the water tank 30. The pressure increases at atmospheric pressure. By detecting this pressure change with a pressure detecting element (not shown) in the water level sensor 36 for water tank, the water level in the water tank 30 is detected. When measuring the water level when the pump 35 is stationary, the air release pipe 37 is not required, but the suction pressure of the pump 35 directly acts on the pressure detection element V, and the accuracy of the water level detection of the water tank 30 is improved. In order to prevent the deterioration, an air release pipe 37 having an open end is provided.

[0024] The steam generating device 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 in the pot 41, and a pot 41. A water level sensor 43 disposed in the vicinity of the upper side of the steam generating heater 42 inside, and a steam suction ejector 44 attached to the upper side of the pot 41. In addition, 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 generating device 40 absorbs the steam through the first pipe 61 and the second pipe 62. It is sent to the inlet side of the ejector 44. The first pipe 61 is arranged substantially horizontally, and one end thereof is 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 steam suction ejector 44. Being!

[0025] The steam suction ejector 44 includes an outer nozzle 46 that wraps the outer side of the inner nozzle 45 so that the discharge side of the inner nozzle 45 communicates with the internal space of the pot 41. It has become. One end of a third noise 63 is connected to the discharge side of the outer nozzle 46 of the steam suction ejector 44, and a 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. In addition, 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 steam 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, on the connection side of the first and second pipes 61 and 62 in the exhaust passage 67, a damper 68 for opening and closing the exhaust passage 67 is disposed.

[0027] The steam temperature raising device 50 is disposed on the ceiling side of the heating chamber 20 and substantially in the center, with the opening facing downward, and in the dish-shaped case 51. Steam 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.

[0028] Further, the steam temperature raising device 50 has a steam supply passage 23 (only one is visible in FIG. 3) as the superheated steam supply passage extending in the upper part of the heating chamber 20 in a direction directed to the left and right sides. Are connected to each other. The steam supply passage 23 extends downward along the both side surfaces of the heating chamber 20, and the other end is connected to a side steam outlet 22 provided below the both side surfaces of the heating chamber 20. It is connected.

[0029] Next, a control system of the heating cooker 1 will be described.

[0030] The control device 80 is also configured with a microcomputer and an input / output circuit and the like. As shown in FIG. 4, the blower fan 28, the steam-caloric heater 52, the danno 68, the water nore 70, the steam, Air generation heater 42, operation panel 11, water tank water level sensor 36, water level sensor 43, A temperature sensor 81 for detecting the temperature in the heating chamber 20 (shown in FIG. 3), a humidity sensor 82 for detecting the humidity in the heating chamber 20, and the pump 35 are connected in force. Based on the detection signals from the water level sensor 36, the water level sensor 43, the temperature sensor 81, and the humidity sensor 82 for the water tank.

V, air blow fan 28, steam heater 52, damper 68, drain valve 70, steam generating heater 42

The operation panel 11 and the pump 35 are controlled according to a predetermined program.

[0031] Hereinafter, the basic operation of the heating cooker 1 having the above-described configuration will be described with reference to FIG. 3 and FIG. 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 generating device 40 by the pump 35 via the first to fourth water supply pipes 31 to 34. 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.

[0033] When the steam generating heater 42 is energized 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 turned on. Energize. 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. At this time, since a centrifugal fan is used as the blower fan 28, a higher pressure can be generated than when a propeller fan is used. Furthermore, by rotating the centrifugal fan used for the blower fan 28 at a high speed with a direct current 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 is circulated through the external circulation path 60 at the location of the steam suction ejector 44. To join. Then, the steam emitted from the steam suction ejector 44 flows into the steam temperature raising device 50 through the third pipe 63 at a high speed.

Then, the steam that has flowed into the steam temperature raising device 50 is heated by the steam heater 52. It becomes superheated steam at about 300 ° C (depending on the cooking content). A part of the superheated steam is jetted 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 sides of the heating chamber 20 through the steam supply passages 23 provided on the left and right sides of the steam heating device 50.

[0036] Thus, the superheated steam ejected from the ceiling side of the heating chamber 20 is vigorously supplied to the central heated object 90 side, and the superheated steam ejected from the left and right side surfaces of the heating chamber 20 is After the collision with the tray 21, the downward force of the heated object 90 is also supplied while rising so as to wrap the heated object 90. As a result, in the heating chamber 20, convection occurs in such a manner that it blows down at the center and rises at the outside. Then, the convective steam is sequentially sucked into and sucked into the suction port 25, and when returning to the heating chamber 20 through the external circulation path 60, the circulation is repeated.

[0037] 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 maintained while maintaining a uniform temperature and humidity distribution in the heating chamber 20. From the ceiling steam outlet 55 and the side outlet 22 and can efficiently collide with the object 90 to be heated placed on the rack 24. Is heated. In that case, the superheated steam in contact with 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. Thereby, 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.

[0038] 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 flows from the discharge port 27 to the discharge passage 64 and the exhaust duct. It is discharged to the outside from the exhaust port 66 through the tato 65. 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. [0039] After the cooking is finished, a cooking end message is displayed on the operation panel 11 by the control device 80, and a signal is emitted 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 controller 80 detects that the door 12 has been opened by a sensor (not shown), and the damper of the exhaust passage 67 is detected. Open 68 instantly. Then, the first pipe 61 of the external circulation path 60 communicates with the exhaust duct 65 through the exhaust path 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, The exhaust port 66 force is also discharged through the exhaust passage 67 and the exhaust duct 65. This damper operation works in the same way even if the user opens the door 12 during cooking. Therefore, the user can safely take out the object to be heated 90 from the heating chamber 20 without being exposed to steam.

[0040] 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 is applied to the object 90 by the latent heat of condensation of the superheated steam. Is to supply the heat energy. That is, when the surface temperature of the object to be heated 90 is 100 ° C or lower and the sprayed steam is superheated steam of 100 ° C or higher, the superheated steam adhering to the surface of the object 90 to be heated is condensed. Condensation latent heat is given to the object 90 to be heated, and 100 ° C. water (hot water) generated by condensation penetrates into the object 90 to be heated and raises the internal temperature.

[0041] In the case where one bowl of rice is warmed with force, the heating principle of the heating cooker 1 described above cannot be applied as it is. In other words, each grain of rice has a small shape. Therefore, if superheated steam is given to the rice, a large amount of heat will be given to each grain as a result, and the surface of the rice grains will directly exceed 100 ° C. However, if the surface of the rice grains exceeds 100 ° C, the superheated steam will repeatedly condense and evaporate on the surface of the rice grains, resulting in no condensation. Therefore, the surface of the rice grain exceeds 100 ° C and becomes dry and hard, whereas the rice grain cannot penetrate 100 ° C condensed water (hot water) (that is, to the inside) It is difficult to transmit heat), and it takes about 7 minutes to reach an appropriate temperature of 60 ° C to 70 ° C.

[0042] From the above, when the rice is heated, the heating time is faster when the steam is heated at a temperature of 80 ° C to 90 ° C without heating the steam. Therefore, in this embodiment, For example, the steam heating device 50 and the steam suction projector 44 are devised as follows, and even when a small amount of food is used to heat rice, the bulky surface area is large! Make sure it can be heated well.

[0043] 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. 5 and 6A to 6D. FIG. 5 is a plan view showing the connection relationship between the steam temperature raising device 50 and the steam suction ejector 44. In the steam heating device 50, a steam heater 52, which is a sheathed heater with a large pipe diameter of large electric power (1000 W), is arranged in a dish-shaped case 51 having a concave portion 51a having a substantially rectangular plane shape! /, The 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. Incidentally, in FIG. 5, the steam heater 52 is expressed in a simplified manner.

[0044] 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 cookers. A steam suction ejector 44 provided on the back side of the heating chamber 20 in 1 is connected via three third pipes 63. The steam supply passages 23A1, 23A2, 23A3 and the steam supply passages 23B1, 23B2, 23B3 are connected to the side walls 92, 93 adjacent to the side wall 91 of the dish-shaped case 51 and facing each other!

In addition, in the recess 51a 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 94B located at the center. Has been. 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.

[0046] Outer ends of the steam supply pipes 94A, 94B, 94C are connected to outer nozzles 46A, 46B, 46C constituting the steam suction ejector 44, respectively. Further, the outlets of the inner nozzles 45A, 45B, 45C are inserted into the conical suction ports of the outer nozzles 46A, 46B, 46C. And the inlets of the inner nozzles 45A, 45B, 45C are connected to the damper motor 103. Therefore, opening and closing by the dampers 104A, 104B, and 104C that are driven to open and close allows communication with the circulation duct 105 that functions as the first pipe 61 and the second pipe 62 as the circulation path. 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 air supply motor 106. The fan casing 26 communicates with the heating chamber 20 through a 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 passed through the exhaust passage 67. The air can be discharged from the exhaust duct 65 to the outside.

[0048] Although not particularly mentioned in the above description, FIG. 5 is a plane that passes through the central axes of the steam supply passage 23, the steam injection pipe 101, the outer nozzle 46, and the inner nozzle 45 so that the inside can be seen. Show the disconnected state.

FIGS. 6A to 6D are longitudinal sectional views of the steam suction ejector 44 and the circulation duct 105 in FIG. 6A is a longitudinal sectional view including the central axes of the outer nozzle 46C and the inner nozzle 45C in 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. 6D is a longitudinal sectional view including the central axis of the damper 68 in FIG. As can be seen from FIGS. 6A to 6C, 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.

[0050] 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 shape in the central outer nozzle 46B connected to the steam injection pipe 101. The distance 107B between the inner surface of the suction port and the outer surface of the air outlet of the inner nozzle 45B is set at the interval 107B between the inner surface of the suction port and the inner nozzle of the other outer nozzles 46A and 46C not connected to the steam injection pipe 101. The distance between the outer surface of the blower outlet in the slurs 45A and 45C is larger than 107A and 107C. Further, the area of the outlets of the inner nozzles 45A and 45C on both sides not connected to the steam injection pipe 101 is larger than the area of the outlet of the central inner nozzle 45B. is doing.

[0051] Further, the steam injection pipe 101 is disposed along the center line of the dish-shaped case 51 and connected to the water nozzle 46B. Therefore, the length of the steam injection pipe 101 can be made shorter than when connecting to the outer nozzles 46A and 46C on both sides, and the steam heater 52 can be arranged with respect to the center line of the dish-shaped case 51. At that time, as shown in FIG. 5, both ends of the steam calorie heater 52 are bent in a direction perpendicular to the center line, and this supply is made near the supply ports of the steam supply pipes 94A and 94C on both sides. Make sure it is opposite the mouth!

[0052] Hereinafter, 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, the steam heating device 50 and the steam suction ejector 44 having the above-described configuration are used. The operation will be described. The above-mentioned “steaming warming mode” is used to warm the above-mentioned bowl of rice. 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”. .

[0053] In this "steaming warming mode", energization of the steam heater 52 is turned off, the air supply fan 28 is driven, and the steam supply on both sides is supplied as shown in FIGS. 5 and 6A to 6D. The inlets of the inner nozzles 45A and 45C communicating with the pipes 94A and 94C are closed by the dampers 104A and 104C, and the inlet of the inner nozzle 45B communicating with the steam injection pipe 101 is opened by the damper 104B. Thereafter, 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. Then, cooking is performed according to the procedure described above. In this case, since the steam heating heater 52 is not energized, the gas supplied to the steam injection pipe 101 is not heated.

[0054] Then, in FIG. 6B, the steam generated in the pot 41 of the steam generator 40 is moved 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 steam 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 vigorously spouted directly downward from the opening 101a, and into one cooked rice serving as the object 90 to be heated. It is sprayed. [0055] In this case, as described above, the distance 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 the steam injection tube 101. The distance between the inner surfaces of the suction ports of the other outer nozzles 46A and 46C that are not connected to the outer surface of the air outlets of the inner nozzles 45A and 45C is larger than 107A and 107C. Therefore, the amount of steam supplied from the pot 41 of the steam generator 40 to the outer nozzle 46B through the interval 107B is made larger than the amount of steam supplied to the outer nozzle 46A, 46C through the intervals 107A, 107C. be able to.

[0056] In addition, the blowing ports of the inner nozzles 45A, 45C communicating with the steam supply pipes 94A, 94C on both sides are closed by the dampers 104A, 104C. Therefore, the suction force from the intervals 107A and 107C, which are the actual suction ports to the outer nozzles 46A and 46C, decreases, 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.

[0057] In the present embodiment as described above, 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 to other values. The distance between the inner surface of the suction port of the outer nozzles 46A and 46C and the outer surface of the outlet of the inner nozzles 45A and 45C is larger than 107A and 107C. In the “steaming heating mode”, 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 nozzles communicating with the steam injection pipe 101 are closed. Open the 45B inlet.

[0058] Therefore, the amount of steam supplied to the outer nozzles 46A and 46C through the intervals 107A and 107C is reduced, and the amount of non-superheated steam supplied to the steam injection pipe 101 through the intervals 107B is increased. be able to. That is, 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. Can do it.

[0059] Needless to say, the above description is not limited to the force "one cup" described in the case of warming one cup of rice. In addition, as described above, cooking such as “boiled” and “steamed” can be performed. [0060] By the way, in the configurations shown in Fig. 5 and Figs. 6A to 6D, the inner nozzles 45A, 45B, 45C have the same inner diameter of the conical inlet in the outer nozzles 46A, 46B, 46C. The interval 107B is made larger than the intervals 107A and 107C by changing the outer diameter of the blowout port at. However, the intervals 107A, 107B, and 107C are 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. You can also.

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

[0062] In the "water oven mode" in which food is heated using superheated steam from the steam temperature raising device 50, the steam supply pipes 94A and 94C communicate with both sides, contrary to the above "steaming warm mode". The inlets of the inner nozzles 45A and 45C are opened by the dampers 104A and 104C, and the inlets of the inner nozzle 45B communicating with the steam injection pipe 101 are closed by the damper 104B. Prior to cooking, preheating is performed to supply superheated steam into the heating chamber 20 to raise the heating chamber 20 to a predetermined temperature. In that case, the area force of the outlet at the inner nozzles 45A, 45C on both sides not connected to the steam injection pipe 101 is larger than the area of the outlet at the central inner nozzle 45B, so the steam supply pipe 94A, 9 Communicating with the dish-shaped case 51 of the steam heating device 50 through 4C! /, The inner nozzle 45A, 45 The absolute amount of gas blown as much as 5C can be increased. Therefore, 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 can be increased. 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.

[0063] In the present embodiment, the steam injection pipe 101 may be connected to the outer nozzles 46A and 46C located at both ends of the force connected to the outer nozzle 46B located at the center. However, in this case, it is desirable that the opening 101a of the steam injection pipe 101 is located at substantially the center of the heating chamber 20, so that the length of the steam injection pipe 101 becomes long. That For this reason, there is a possibility that temperature spots will occur in the superheated steam in the dish-shaped case 51 where it is difficult to place the steam heater 52 on the object with respect to the center line of the dish-shaped case 51.

In the present embodiment, it is needless to say that the present invention is not limited to the “three” force that provides three inner nozzles 45 and three outer nozzles 46 each.

Claims

The scope of the claims

[1] a steam generator (40) for generating steam;

A steam heating device (50) for raising the steam of the steam generator (40) force, and

A heating chamber (20) for heating the object to be heated (90) by the steam supplied by the steam generator (40) or the steam heating device (50);

An outer nozzle (46) having a blower outlet and a suction port, and an inner nozzle (45) having a blower outlet and a blower port inserted into the suction port of the outer nozzle (46). 40) a plurality of steam suction ejectors (44) that sucks the steam generated by the suction nozzle and blows out from the outlet of the outer nozzle (46) by the gas blown from the inlet;

The steam is connected to any one of the plurality of steam suction ejectors (44), and the steam from the outlet of the outer nozzle (46) is guided to the heating chamber (20), and the heating chamber (20 ) Steam injection pipe (101) that injects into

Connected to the steam suction ejector (44) not connected to the steam injection pipe (101), and supplies steam from the outlet of the outer nozzle (46) to the steam temperature raising device (50). Steam supply pipe (94) and

With

The distance (107B) between the inner surface of the suction port of the outer nozzle (46B) and the outer surface of the outlet port of the inner nozzle (45B) in the steam suction projector (44) connected to the steam injection pipe (101) is Between the inner surface of the suction port of the outer nozzle (46A, 46C) and the outer surface of the outlet port of the inner nozzle (45A, 45C) in the steam suction projector (44) connected to the steam supply pipe (94) 107A, 107C) is a heating cooker characterized by being larger.

[2] In the heating cooker according to claim 1,

The steam suction ejector (44) connected to the steam injection pipe (101) is a steam suction bow I ejector (44) disposed at the center of the plurality of steam suction ejectors (44). A cooking device characterized by being.

[3] In the heating cooker according to claim 1,

An opening provided in the heating chamber (20); A circulation fan (28) is provided, and a circulation path (105) connected to the inlet of the inner nozzle (45) and the opening of the heating chamber (20) in each of the steam suction ejectors (44). )When

With

The area of the outlet of the inner nozzle (45A, 45C) in the steam suction projector (44) connected to the steam supply pipe (94) is determined by the steam suction projector (44) connected to the steam injection pipe (101). ) In which the area of the outlet of the inner nozzle (45B) is larger.

In the heating cooker according to claim 3,

The steam heating device (50) has a steam heater (52),

At least a part of the steam heater (52) is disposed near the supply port of the steam supply pipe (94) so as to face the supply port.