WO2008001609A1 - Heating cooker - Google Patents

Abstract

A heating cooker comprises a heating chamber (20) in which an opening part (20d) for taking-in and -out an object (F) to be heated is provided at the front of the chamber, a door (11) for opening and closing the opening part (20d), heating medium generation means (50, 40) for generating a heating medium, a jetting means (26, 61) for jetting the heating medium in the direction from the roof part of the heating chamber (20) to the door (11) and in the lower direction, and suction means (28, 26) for sucking the heating medium into the heating chamber (20) in the direction toward the rear of the heating chamber (20). The object (F) is heated and cooked by the heating medium.

Description

 Specification

 Cooker

 Technical field

 [0001] The present invention relates to a heating cooker that cooks an object to be heated by ejecting a heating medium into a heating chamber.

 Background art

 [0002] A conventional cooking device is disclosed in Patent Document 1. This heating cooker uses superheated steam as a heating medium, and an object to be heated is placed on a tray placed in the heating chamber. A water tank is arranged on the side of the heating chamber, and water taken out by the water tank power feed pump is supplied to the steam generator. The steam generator generates steam from the supplied water and sends it to the steam temperature raising device. The steam temperature raising device further heats the steam to generate superheated steam, and the superheated steam is jetted in the direction directly below the top of the heating chamber to cook the object to be heated.

 [0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2005-61816

 Disclosure of the invention

 Problems to be solved by the invention

[0004] However, according to the above-described conventional cooking device, superheated steam is blown out from the ceiling of the heating chamber in the downward direction, and the superheated steam reaches the peripheral portion of the tray. For this reason, there was a problem in that the object to be heated arranged around the saucer was insufficiently heated, resulting in uneven cooking on the saucer. Also, if superheated steam is spouted toward the ceiling door and the peripheral wall, the door is always exposed to superheated steam, so a door with high heat resistance is required. Therefore, there is a problem that the cost of the cooking device increases.

 [0005] An object of the present invention is to provide a heating cooker capable of uniformly cooking an object to be heated with a heating medium while suppressing heating of the door.

 Means for solving the problem

[0006] In order to achieve the above object, the present invention provides a heating chamber provided with an opening on the front surface for taking in and out an object to be heated, a door that opens and closes the opening, and a heating medium that generates a heating medium. Living A heating cooker comprising: a generating unit; a jetting unit that jets the heating medium from a ceiling portion of the heating chamber toward the door and a downward direction; and a suction unit that sucks the heating medium in the heating chamber. There,

 The suction means sucks the heating medium ejected by the ejection means toward the back surface of the heating chamber.

 According to this configuration, the heating medium generated by the heating medium generation unit is supplied to the ejection unit and is ejected from the ceiling portion of the heating chamber toward the front door and downward. Since the heating medium ejected toward the door is sucked toward the back of the heating chamber by the suction means, the airflow is bent backward. As a result, the heating medium convects in the heating chamber, and the object to be heated is cooked. Note that if the ejection speed of the heating medium by the ejection means is relatively increased with respect to the suction force of the suction means, the airflow of the heating medium is bent at the lower part of the heating chamber and flows backward. When the ejection speed of the heating medium by the ejection means is made relatively small with respect to the suction force of the suction means, the air flow of the heating medium is bent at the upper part of the heating chamber and flows backward.

 [0008] Further, the present invention is characterized in that, in the heating cooker configured as described above, the suction means is provided on a back surface of the heating chamber.

[0009] Further, the present invention is characterized in that, in the cooking device configured as described above, the spraying means sprays the heating medium toward the door in a diagonally downward direction.

[0010] Further, the present invention provides the cooking device configured as described above, wherein the jetting unit is formed with a jet port formed on an inclined surface inclined with respect to a top surface of the heating chamber, and the tilt from the periphery of the jet port. And a cylindrical guide portion extending perpendicularly to the surface. According to this configuration, the heating medium is guided obliquely downward from the jetting means disposed on the ceiling portion by the guide of the cylindrical guide portion whose axial direction is inclined, and is jetted through the jet port.

[0011] Further, in the cooking device according to the present invention, the suction unit includes an intake port formed on a rear surface of the heating chamber and a blower fan that sucks the intake loci, and the ejection unit is the The heating medium sucked and sucked from the intake port is ejected by the blower fan. According to this configuration, the heating medium generated by the heating medium generation unit is ejected into the heating chamber by driving the blower fan. Also, by the blower fan Then, the heating medium is sucked from the heating chamber and is ejected into the heating chamber together with the heating medium generated by the heating medium generating means.

 [0012] Further, the present invention is characterized in that the heating cooker configured as described above includes an exhaust fan that sucks air from the back of the heating chamber and exhausts the heat chamber to the outside. According to this configuration, the heating medium in the heating chamber is ejected from the ceiling portion by the blower fan, and a part is exhausted to the outside by the exhaust fan. Thereby, the suction amount can be increased with respect to the ejection amount of the heating medium.

 [0013] Further, the present invention provides the cooking device configured as described above, wherein the suction means includes an exhaust port formed on a back surface of the heating chamber, and an exhaust fan that sucks air from the exhaust port and exhausts the heat chamber outside. It is characterized by having. According to this configuration, the heating medium generated by the heating medium generation unit is ejected into the heating chamber by the ejection unit. Also, the heating chamber force heating medium is sucked by the exhaust fan and exhausted to the outside.

 [0014] Further, the present invention is characterized in that, in the cooking device having the above-described configuration, the heating medium is further ejected by the ejection means toward both side walls of the ceiling portion of the heating chamber. According to this configuration, the heating medium is ejected forward and laterally from the ejection means. The heating medium ejected to the side is reflected by the side wall of the heating chamber and heats the back surface of the object to be heated.

 [0015] Further, the present invention is characterized in that, in the heating cooker configured as described above, the heating medium is made of superheated steam.

 The invention's effect

 [0016] According to the present invention, since the heating medium is jetted toward the ceiling door of the heating chamber, the heating medium spreads to the front of the heating chamber to prevent insufficient heating, and the object to be heated can be cooked uniformly. it can. Further, since the heating medium is sucked toward the back of the heating chamber, the high-temperature heating medium that directly hits the door from the ejection means can be reduced. Accordingly, it is possible to prevent an increase in the cost of the heating cooker that does not require the use of a door with high heat resistance by suppressing heating of the door.

[0017] According to the present invention, since the suction means is provided on the back surface of the heating chamber, the heating medium in the heating chamber can be efficiently sucked in the back surface direction. [0018] Further, according to the present invention, since the ejection means ejects the heating medium obliquely downward, it is possible to reduce the temperature drop of the heating medium that reaches the front portion of the object to be heated placed on the tray or the like. Therefore, insufficient heating of the object to be heated can be further reduced.

 [0019] According to the present invention, the jetting means includes a jet port formed on an inclined surface inclined with respect to the top surface of the heating chamber, and a cylindrical guide extending perpendicularly to the inclined surface from the periphery of the jet port. The heating medium can be easily ejected obliquely downward.

 [0020] Further, according to the present invention, the blower fan that sucks air from the suction port formed on the back surface is provided, and the heating medium sucked from the suction port is blown out by the blower fan. A cooking device for sucking can be easily realized. In addition, the heating medium supply fan and the suction fan can be combined to reduce costs.

[0021] According to the present invention, since the exhaust fan is provided in addition to the blower fan, it is possible to reduce the ejection speed by the blower fan and increase the suction by the exhaust fan. Therefore, the heating medium reaching the door can be further reduced.

 [0022] Further, according to the present invention, the exhaust fan that sucks air from the exhaust port formed on the back surface of the heating chamber and exhausts it to the outside of the heating chamber is provided. The suction can be strengthened. Therefore, the heating medium reaching the door can be further reduced.

 [0023] According to the present invention, since the calorie heat medium is ejected from the ceiling portion of the heating chamber toward the both side walls by the ejection means, the lower surface of the object to be heated can be easily heated.

 Brief Description of Drawings

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

 FIG. 2 is a front view showing a state in which the door of the heating cooker according to the first embodiment of the present invention is opened.

 FIG. 3 is a front view showing a heating chamber of the heating cooker according to the first embodiment of the present invention.

 FIG. 4 is a perspective view showing an ejection cover of the heating cooker according to the first embodiment of the present invention.

 FIG. 5 is a plan view showing a spray cover of the heating cooker according to the first embodiment of the present invention.

 FIG. 6 is a side sectional view showing a spray cover of the heating cooker according to the first embodiment of the present invention.

FIG. 7 is a diagram showing the internal structure of the heating cooker according to the first embodiment of the present invention. FIG. 8 is a block diagram showing the configuration of the heating cooker according to the first embodiment of the present invention. FIG. 9 is a front view showing the heating cooker according to the first embodiment of the present invention.

FIG. 10 is a diagram showing the internal structure of the heating cooker according to the second embodiment of the present invention. FIG. 11 is a diagram showing the internal structure of the heating cooker according to the third embodiment of the present invention. The figure which shows the internal structure of the heating cooker of 3 embodiment. [FIG. 13] The figure which shows the internal structure of the heating cooker of 3rd Embodiment of this invention Description of code | symbol

 1 Cooking device

 11 Door

 20 Heating chamber

 21 saucer

 26 Blower fan

 28 Air intake

 31 Exhaust fan

 32, 33 Exhaust duct

 34 Steam supply duct

 35 Circulation duct

 40 Steam temperature riser

 41 Steam heater

 47 External force bar

 48 Damba

 50 generator

 51 Pot

 52 Steam generating heater

 54 Water Banolev

 55 Water supply channel

 56 Water level sensor

57 Water supply pump 61 Spout cover

 63 Plane section

 64 Inclined surface

 64a Side

 64b front

 64c Corner

 65, 66, 67 Fumarole

 65a, 66a, 67a Guide

 68 Reflector

 71 water tank

 81 pot water level sensor

 91 Water level detector

 F Object to be heated

 BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a heating cooker according to the first embodiment. The cooking device 1 cooks an object to be heated with a heating medium made of superheated steam. The heating cooker 1 includes a rectangular parallelepiped cabinet 10. A door 11 is provided in front of the cabinet vignette 10.

 [0027] The door 11 is pivotally supported in a vertical plane centering on the lower end, and a handle 12 for opening and closing the door 11 is provided at the upper part. The central part 11C of the door 11 is provided with a transmissive part 11a (see FIG. 2) in which a heat-resistant glass is fitted and the inside can be seen. A left side portion 11L and a right side portion 11R provided with a metal decorative plate on the surface are symmetrically arranged on the left and right sides of the central portion 11C. An operation panel 13 is provided on the right side 11R of the door 11.

 FIG. 2 shows a front view of the heating cooker 1 with the door 11 open. The door 11 can be rotated 90 degrees from the vertical closed state to the horizontal open state by holding the handle 12 and pulling it forward. Opening door 11 exposes the front of cabinet 10.

[0029] A heating chamber 20 is provided at a location corresponding to the central portion 11C of the door 11. A water tank chamber 70 is provided at a position corresponding to the left side 1 1L of the door 11, and is a water tank for storing water for generating steam. 71 is stored. There is an opening especially at the location corresponding to the right side 11R of the door 11, but a control board (not shown) is placed inside! RU

 [0030] The heating chamber 20 is formed in a substantially rectangular parallelepiped, and the entire front side facing the door 11 serves as an opening 20d for taking in and out the article to be heated F (see FIG. 7). By opening the door 11, the opening 20d is opened and closed. The wall surface of the heating chamber 20 is formed of a stainless steel plate, and the outer peripheral surface of the heating chamber 20 is provided with heat insulation measures.

 FIG. 3 is a front view showing details in the heating chamber 20. On the side wall of the heating chamber 20, a plurality of tray support portions 20b and 20c are provided at different heights. The upper tray support part 20b is provided below a reflection part 68 described later. A tray 21 made of stainless steel is locked to one or more of the tray support portions 20b and 20c. A stainless steel wire rack 22 on which the object to be heated F is placed is placed on the tray 21.

 [0032] When cooking with superheated steam, the saucer 21 is installed in the upper saucer support 20b. As a result, the superheated steam can be guided to the lower surface of the object to be heated F by the reflection of the reflecting portion 68 as will be described later. The tray 21 may be installed on the upper and lower tray support portions 20b and 20c. Thereby, many to-be-heated articles F can be cooked at once. At this time, the tray 21 arranged on the tray support 20b is formed to have air permeability, and superheated steam is supplied to the lower tray 21! / Speak.

 [0033] The back wall on the back side of the heating chamber 20 is provided with an intake port 28 at a substantially central portion in the left-right direction, and an exhaust port 32a at a lower left portion. The reflecting portion 68 is recessed on both side walls of the heating chamber 20, and the surface is formed by a curved surface. Superheated steam jetted laterally from a jet cover 61, which will be described later, toward the reflecting portion 68 is reflected by the reflecting portion 68 and guided below the object to be heated F (see FIG. 7).

 [0034] On the top surface of the heating chamber 20, an ejection cover 61 having a stainless steel plate force for ejecting superheated steam is attached. An illumination device 69 that illuminates the inside of the heating chamber 20 is provided on the front side of the right side portion of the ejection cover 61.

4, FIG. 5, and FIG. 6 show a perspective view, a plan view, and a side sectional view of the main part of the ejection cover 61. FIG. The ejection cover 61 is formed in a substantially hexagonal shape in which both front corners are chamfered with respect to a rectangle in plan view. The blowout cover 61 has a surface treatment such as painting on both the upper and lower sides. And finished in dark color. As a result, the radiant heat of the steam heater 41 (see FIG. 7) is absorbed and radiated from the lower surface of the ejection cover 61 to the heating chamber 20.

 [0036] For this reason, the steam temperature raising device 40 (see FIG. 7) and the outer surface thereof are prevented from rising in temperature, thereby improving safety and improving the heating efficiency of the heating chamber 20. The ejection cover 61 may be formed of a metal material that changes color to dark when used repeatedly. Alternatively, the ejection cover 61 may be formed of a dark ceramic product.

 [0037] A mounting portion 62 that is in close contact with the top surface of the heating chamber 20 is provided on the peripheral portion of the ejection cover 61. The mounting portion 62 is provided with a plurality of screw holes 62a for screwing the ejection cover 61. A flat surface portion 63 that is continuous through an inclined surface 64 that is inclined with respect to the attachment portion 62 is provided in the central portion of the ejection cover 61.

 [0038] The inclined surface 64 includes a side surface portion 64a, a front surface portion 64b, a corner portion 64c, and a back surface portion 64d. The side surface portion 64a is formed to extend in a direction parallel to the side wall of the heating chamber 20. The front part 64 b is provided on the front side of the ejection cover 61 and is formed to extend in a direction parallel to the door 11. The corner portion 64c connects the side surface portion 64a and the front surface portion 64b obliquely. The back surface portion 64d is provided on the back surface side of the jet bar 61 and extends in a direction parallel to the back wall of the heating chamber 20.

 [0039] The flat surface portion 63 and the inclined surface 64 are provided with a plurality of air outlets 65, 66, and 67. A cylindrical guide portion 65a perpendicular to the flat surface portion 63 is formed on the periphery of the air outlet 65 provided in the flat surface portion 63. Cylindrical guide portions 66a and 67a perpendicular to the inclined surface 64 are formed at the peripheral edges of the fumaroles 66 and 67 provided on the inclined surface 64. As a result, the airflow can be guided in the axial direction of the air outlets 65, 66, and 67.

 [0040] The fumaroles 66 and 67 of the inclined surface 64 are provided with a higher density and a larger diameter than the fumarole 65 of the flat portion 63. Further, the fume holes 66 in the side surface portion 64a of the inclined surface 64 are provided at a higher density than the fume holes 67 in the front surface portion 64b and the corner portion 64c. In addition, the back surface 64d of the inclined surface 64 is provided with a fumarole! / ,!

FIG. 7 shows the internal structure of the heating cooker 1. In the figure, the heating chamber 20 is viewed from the side. As shown in FIG. 2, the water tank 71 is disposed on the left side of the heating chamber 20 and communicates with the water level detection unit 91 via the joint unit 58. This allows cabinet 10 ( The water tank 71 is detachable with respect to (see Fig. 1).

 The water level detection unit 91 is provided with a water level sensor 56. The water level sensor 56 has a plurality of electrodes, and detects the water level by changing the resistance value between the electrodes. In this embodiment, the water level is detected in three stages by four electrodes. If the water level in the water tank 71 falls below a predetermined water level as detected by the water level sensor 56, a notification is made to prompt water supply.

 [0043] In the water level detection unit 91, a water supply channel 55 extends to the bottom and is immersed. The water supply channel 55 is provided with a water supply pump 57 on the way and connected to the steam generator 50. The steam generator 50 has a cylindrical pot 51 whose axial direction is vertical, and water is supplied from the water tank 71 to the pot 51 by driving a water supply pump 57.

 The pot 51 has a flat shape such as a rectangle or an oval in plan view. The pot 51 is made of metal, synthetic resin, ceramic, or a combination of these different materials, and has heat resistance. A steam generating heater 52 having a helical sheathed heater force is immersed in the pot 51. By energizing the steam generating heater 52, the water in the pot 51 is heated and steam is generated.

 [0045] In the pot 51, a cylindrical isolation wall 51a extending into the spiral steam generating heater 52 is formed, and a pot water level sensor 81 is provided in the isolation wall 51a. The pot water level sensor 81 has a plurality of electrodes, and detects the water level by a change in resistance value between the electrodes. When the water level in the pot 51 reaches a predetermined water level, the water supply pump 57 is stopped. Further, by providing the isolation wall 51a, foaming due to boiling of water in contact with the steam generating heater 52 can be transmitted to the pot water level sensor 81. Thereby, the detection accuracy of the pot water level sensor 81 can be improved.

 A steam supply duct 34 connected to a circulation duct 35 described later is led out on the upper surface of the pot 51. An overflow pipe 98 connected to the water level detection unit 91 is provided at the upper part of the peripheral surface of the pot 51. As a result, the overflow of the water supply channel 55 is guided to the water tank 71. The overflow level of the overflow pipe 98 is set to be lower than the steam supply duct 34 which is higher than the normal water level in the pot 51.

[0047] The bottom of the pot 51 is formed in a funnel shape, and the drain pipe 53 is led out also at the lower end force. A drain valve 54 is provided in the middle of the drain pipe 53! Drain pipe 53 is water tank A slope of a predetermined angle toward the center 71 is provided. As a result, the drain valve 54 can be opened to drain the water in the pot 51 into the water tank 71, and the water tank 71 can be removed and discarded.

 [0048] A circulation duct 35 is provided on the outer wall of the heating chamber 20 from the back to the top. The circulation duct 35 opens an intake port 28 formed on the back surface of the heating chamber 20 and is connected to a steam temperature raising device 40 disposed above the heating chamber 20. The lower surface of the steam heating device 40 is covered with the ejection cover 61, and the upper surface is covered with the upper cover 47.

 [0049] A blower fan 26 having a centrifugal fan force is installed in the circulation duct 35, and the steam supply duct 34 is connected to the upstream side of the blower fan 26. The steam generated by the steam generating device 50 by driving the blower fan 26 flows into the circulation duct 35 through the steam supply duct 34. In addition, the steam in the heating chamber 20 is sucked from the intake port 28, is circulated through the circulation duct 35, ejected from the blast ports 65, 66, and 67 of the ejection cover 61.

 [0050] Since the intake port 28 is provided on the back surface of the heating chamber 20, the heating medium in the heating chamber 20 can be efficiently sucked in the back surface direction. Accordingly, the air outlets 65, 66, and 67 of the blower fan 26 and the jet cover 61 constitute jet means for jetting superheated steam into the heating chamber 20. The blower fan 26 and the intake port 28 constitute suction means for sucking air and steam from the heating chamber 20. Since the ejection means and the suction means are constituted by the common blower fan 26, an increase in the cost of the heating controller 1 can be suppressed.

 [0051] In general, the gas in the heating chamber 20 is air, but when steam cooking is started, the air is replaced with steam. In the following description, it is assumed that the gas in the heating chamber 20 is replaced with steam.

[0052] An exhaust duct 33 that branches via an electric damper 48 is provided above the circulation duct 35. The exhaust duct 33 has an open end facing the outside, and the steam in the heating chamber 20 is forcibly exhausted by opening the damper 48 and driving the blower fan 26. Further, an exhaust duct 32 communicating with the lower portion of the heating chamber 20 through an exhaust port 32a is led out. The exhaust duct 32 is made of a metal such as stainless steel and has an open end that faces the outside, and naturally exhausts the steam in the heating chamber 20. In addition, when the cooking device 1 is equipped with a magnetron for cooking by microwaves, outside air is sucked through the exhaust duct 32. [0053] The steam temperature raising device 40 includes a steam heater 41 having a sheathed heater power, and further heats the steam generated by the steam generator 50 to generate superheated steam. Accordingly, the steam generator 50 and the steam temperature raising device 40 constitute a heating medium generating means for generating a heating medium made of superheated steam. The steam temperature raising device 40 is disposed in the center of the ceiling of the heating chamber 20 when viewed in plan. In addition, the heating chamber 20 is formed in a small volume with a small area with respect to the top surface of the heating chamber 20 so that high heating efficiency can be obtained!

 FIG. 8 is a block diagram showing a control configuration of the heating cooker 1. The heating cooker 1 includes a control device 80 having a micro-processor and a memory. The control unit 80 has a blower fan 2

6, Steam heater 41, Damper 48, Steam generating heater 52, Drain valve 54, Water supply pump 5

7. Operation panel 13, pot water level sensor 81, water level sensor 56, temperature sensor 82, and humidity sensor 83 are connected. The cooking device 1 is driven by controlling each part by the control device 80 according to a predetermined program.

 The operation panel 13 has a display unit (not shown), and displays the control status on the display unit. The operation command is input through various operation keys arranged on the operation panel 13. The operation panel 13 is also provided with a sound generator (not shown) for producing various sounds. The temperature sensor 82 detects the temperature in the hot heat chamber 20. The humidity sensor 83 detects the humidity in the heating chamber 20.

 In the heating cooker 1 configured as described above, the door 11 is opened and the water tank 71 is pulled out from the water tank chamber 70, and water is put into the water tank 71. The fully filled water tank 71 is pushed into the water tank chamber 70 and connected to the water level detection unit 91 by the joint unit 58. The object to be heated F is placed on the rack 22, the door 11 is closed, and the operation panel 13 is operated to select the menu. Pressing the start key (not shown) on the operation panel 13 starts the cooking sequence. As a result, the feed water pump 57 starts operation, and the steam generator 50 is supplied with water. At this time, the drain valve 54 is closed.

[0057] The water supply pump 57 is driven to supply water into the pot 51 through the water supply passage 55. When the pot 51 reaches a predetermined water level, the water supply is stopped by detection of the pot water level sensor 81. At this time, the water level of the water tank 71 is monitored by the water level sensor 56, and a warning is given if the water tank 71 does not have enough water for cooking. When a predetermined amount of water is put into the pot 51, the steam generating heater 52 is energized, and the steam generating heater 52 directly heats the water in the pot 51. [0058] The blower fan 26 and the steam heater 41 are energized at the same time as the energization of the steam generating heater 52 or when the water in the pot 51 reaches a predetermined temperature. By driving the blower fan 26, the steam in the heating chamber 20 is sucked into the circulation duct 35 from the intake port 28. Further, when the water in the pot 51 boils, saturated steam at 100 ° C. and 1 atm is generated, and the saturated steam flows into the circulation duct 35 through the steam supply duct 34. At this time, the damper 48 is closed. The steam pumped from the blower fan 26 flows through the circulation duct 35 and flows into the steam heating device 40.

 [0059] The steam flowing into the steam temperature raising device 40 is heated by the steam heater 41 to become superheated steam of 100 ° C or higher. Normally, superheated steam heated from 150 ° C to 300 ° C is used. Part of the superheated steam is ejected from the fumarole 65 in the downward direction (arrow A). As a result, the upper surface of the object to be heated F comes into contact with the superheated steam. In addition, as shown in the front view of FIG. 9, a part of the superheated steam is ejected from the fumarole 66 in a diagonally downward direction (arrow B) to the side. The superheated steam ejected in the direction of arrow B is reflected by the reflecting portion 68 and guided below the object F to be heated. Thereby, the lower surface of the article to be heated F comes into contact with the superheated steam.

 [0060] When the surface of the object to be heated F is 100 ° C or less, the superheated steam condenses on the surface of the object to be heated F. Since this condensation heat is as large as 539 calZg, in addition to convection heat transfer, a large amount of heat can be given to the heated object F.

 [0061] In addition, a part of the superheated steam is ejected obliquely downward (arrow C) toward the door 11 from an air outlet 67 formed in the front surface portion 64b of the ejection cover 61. The steam in the heating chamber 20 is sucked from the intake port 28 by the blower fan 26. Due to this suction force, the superheated steam that is blown forward is bent and guided backward. Thereby, a part of the superheated steam collides with the front part of the upper surface of the object F to be heated, and a part of the superheated steam is guided below the object F to be heated.

As a result, the superheated steam spreads to the front part of the heating chamber 20 and the insufficient heating of the front part of the article F to be heated is prevented. Further, the rear part of the object to be heated F is heated by the superheated steam that flows backward by the suction of the blower fan 26. Therefore, the object to be heated F can be cooked uniformly. Further, since the air is sucked from the intake port 28, the high-temperature superheated steam that directly hits the door 11 can be reduced. Therefore, it is necessary to use the door 11 with high heat resistance by suppressing the heating of the door 11. It is possible to prevent an increase in the cost of the heating cooker 1.

 When the suction force of the blower fan 26 is reduced, the air flow of superheated steam blown forward is bent at the lower part of the heating chamber 20. As a result, more superheated steam can be guided to the lower surface of the object to be heated F. When the suction force of the blower fan 26 is increased, the airflow of superheated steam blown forward is bent at the top of the heating chamber 20. As a result, more superheated steam can be guided to the upper surface of the object F to be heated.

 [0064] Further, a part of the superheated steam is jetted obliquely downward from the jet port 67 formed in the corner portion 64c of the jet cover 61 toward the boundary between the door 11 and the heating chamber 20 side wall. Thereby, the superheated steam spreads to the front corner of the heating chamber 20 to prevent insufficient heating of the front part of the heated object F, and the heated object F can be cooked more uniformly.

 [0065] When the amount of steam in the heating chamber 20 increases with time, surplus steam is discharged to the outside through the exhaust duct 32.

 [0066] The superheated steam ejected from the vent holes 65, 66, and 67 heats the article to be heated F, and then is sucked into the circulation duct 35 from the intake port 28 and flows into the steam temperature raising device 40. As a result, the steam in the hot heat chamber 20 is repeatedly circulated for cooking.

 [0067] When cooking is completed, the control device 80 displays the completion of cooking on the display unit of the operation panel 13 and notifies a signal sound. When the door 11 is opened by a user who is informed of the end of cooking, the damper 48 is opened, and the steam in the heating chamber 20 is rapidly forcibly exhausted from the exhaust duct 33. As a result, the user can safely remove the object to be heated F from the heating chamber 20 without touching the high-temperature steam.

 [0068] According to the present embodiment, the heating medium made of superheated steam is ejected from the ceiling of the heating chamber 20 toward the door 11 by the ejection means having the blower fan 26 and the jet cover 61. The heating medium spreads to the front of the. Thereby, insufficient heating of the front part of the object to be heated F can be prevented, and the object to be heated F can be cooked uniformly.

[0069] Further, since the heating medium is sucked toward the back surface of the heating chamber 20 by the suction means including the air inlet 28 and the blower fan 26, the high-temperature heating medium directly hitting the door 11 from the ejection means can be reduced. . Therefore, it is possible to prevent an increase in the cost of the heating cooker 1 without the need to use the door 11 having high heat resistance by suppressing the heating of the door 11. [0070] Further, since the heating medium is ejected obliquely downward from the gas outlet 67 of the ejection cover 61, the heating medium quickly reaches the front portion of the article to be heated F on the rack 22. Thereby, the temperature drop of the heating medium can be reduced, and insufficient heating of the article to be heated F can be further reduced.

 [0071] It should be noted that a shutter for changing the opening area of the air outlet 67 and a shutter for changing the opening area of the air inlet 28 may be provided. As a result, the jet speed from the jet port 67 is reduced, and the suction from the intake port 28 is strengthened, so that the superheated steam reaching the door 11 can be further reduced. In addition, it is possible to increase the amount of heating at the front part of the heating chamber 20 by increasing the ejection speed from the air outlet 67 and weakening the suction from the air inlet 28.

 Next, FIG. 10 is a diagram showing a configuration of the heating cooker according to the second embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 9 are denoted by the same reference numerals. In the present embodiment, an exhaust fan 31 is provided in the exhaust duct 32. The other parts are the same as in the first embodiment.

 [0073] The suction means for sucking the heating chamber 20 from the back is constituted by the intake port 28 and the blower fan 26, and is constituted by the exhaust port 32a and the exhaust fan 31. That is, the steam in the heating chamber 20 is sucked from the intake port 28 and the exhaust port 32a by driving the blower fan 26 and the exhaust fan 31. With this suction force, the superheated steam blown toward the door 11 is bent and guided backward. Thereby, a part of the superheated steam collides with the front part of the upper surface of the object to be heated F, and a part of the superheated steam is guided below the object F to be heated by the front force.

 [0074] According to the present embodiment, similarly to the first embodiment, the superheated steam spreads to the front part of the heating chamber 20, prevents the front part of the heated object F from being insufficiently heated, and makes the heated object F uniform. Can be cooked to In addition, since the heating medium is sucked from the intake port 28 on the back of the heating chamber 20, it is possible to reduce high-temperature superheated steam that directly contacts the door 11. Therefore, it is possible to prevent an increase in the cost of the heating cooker 1 that does not require the use of the door 11 having high heat resistance by suppressing the heating of the door 11.

 [0075] In addition, the ejection speed by the blower fan 26 can be reduced and the suction by the exhaust fan 32 can be increased. Therefore, the superheated steam reaching the door 11 can be further reduced.

Next, FIG. 11 is a diagram showing a configuration of the heating cooker according to the third embodiment. For convenience of explanation, Portions similar to those of the second embodiment shown in FIG. 10 are given the same reference numerals. In this embodiment, the air inlet 28 (see FIG. 10) is not opened in the circulation duct 35. Further, the exhaust port 32a is provided above the rack 22 on the tray 21 supported by the middle tray support portion 20b. The other parts are the same as in the second embodiment.

 [0077] The suction means for sucking the heating chamber 20 from the back is constituted by an exhaust port 32a and an exhaust fan 31. That is, the steam in the heating chamber 20 is sucked from the exhaust port 32 a by driving the exhaust fan 31. Due to this suction force, the airflow of superheated steam blown toward the door 11 is bent and guided backward. Thereby, a part of the superheated steam collides with the front part of the upper surface of the object to be heated F, and a part of the forward force is also guided below the object to be heated F.

 FIG. 11 shows a case where the rotational speed of the exhaust fan 32 is small. As shown by the arrow C, the amount of superheated steam led to the lower side of the heated object F increases because the backward suction force is weak. FIG. 12 shows a case where the rotational speed of the exhaust fan 32 is large. As indicated by the arrow C ′, since the suction is performed backward with a strong suction force above the rack 2, the amount of superheated steam guided above the heated object F increases.

 FIG. 13 shows a case where the exhaust fan 32 is stopped. As shown by arrow C ", the superheated steam ejected from the ejection bar 61 circulates along the door 11. As a result, the exhaust fan 32 is stopped for a short time to remove condensation on the door 11. The visibility of the transmission part 1 la (see Fig. 2) can be improved.

 [0080] According to the present embodiment, as in the second embodiment, the superheated steam spreads to the front part of the heating chamber 20 to prevent insufficient heating of the front part of the heated object F, and the heated object F is made uniform. Can be cooked to In addition, since the heating medium is sucked from the intake port 28 on the back of the heating chamber 20, it is possible to reduce high-temperature superheated steam that directly contacts the door 11. Therefore, it is possible to prevent an increase in the cost of the heating cooker 1 that does not require the use of the door 11 having high heat resistance by suppressing the heating of the door 11.

 [0081] The discharge speed by the blower fan 26 can be reduced and suction by the exhaust fan 32 can be increased. Therefore, the superheated steam reaching the door 11 can be further reduced.

[0082] In the first to third embodiments, superheated steam is blown obliquely downward from the fumarole 67. However, it may be ejected horizontally. In addition, superheated steam is used as the heating medium for heating the object to be heated F! /, But other heating media such as saturated steam and heated air may be used. Industrial applicability

 INDUSTRIAL APPLICABILITY The present invention can be used for household and commercial heating cookers that cook with a heating medium such as superheated steam.

Claims

The scope of the claims  [1] A heating chamber provided with an opening for taking in and out the object to be heated in front, a door for opening and closing the opening, a heating medium generating means for generating a heating medium, and the heating medium for the heating chamber A heating cooker comprising: spraying means for spraying in the direction facing the door and in the downward direction; and suction means for sucking the heating medium in the calo heat chamber, wherein the suction means is A heating cooker characterized in that the heating medium ejected by the ejection means is sucked toward the back of the heating chamber.  [2] The cooking device according to claim 1, wherein the suction means is provided on a back surface of the heating chamber.  [3] The cooking device according to [1], wherein the spraying means sprays the heating medium toward the door in a diagonally downward direction. [4] The jetting means includes a jet port formed on an inclined surface inclined with respect to the top surface of the heating chamber, and a cylindrical guide portion extending perpendicularly to the inclined surface from a peripheral edge of the jet port. The heating cooker according to claim 3, wherein the cooking device has. [5] The suction means includes an air inlet formed on the back surface of the heating chamber and a blower fan that sucks air from the air inlet, and the jet means sucks from the air inlet! 2. The cooking according to claim 1, wherein the heated heating medium is blown out by the blower fan. 6. The cooking device according to claim 5, further comprising an exhaust fan that sucks the rear force of the heating chamber and sucks the exhaust air out of the heating chamber. 7. The suction unit according to claim 1, further comprising an exhaust port formed on a back surface of the heating chamber, and an exhaust fan that sucks air from the exhaust port and exhausts the heat chamber to the outside. Cooking cooker.  8. The cooking device according to claim 1, wherein the heating medium is further ejected from the ceiling portion of the heating chamber toward both side walls by the ejection means. 9. The heating cooker according to claim 1, wherein the heating medium is made of superheated steam.