JP2008008557A - Heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating cooker capable of performing uniform cooking by a heating medium. <P>SOLUTION: In this heating cooker 1 comprising a heating chamber 20 provided with an opening portion 20d for taking in and out a heated object F, on a front face, a door 11 for opening and closing the opening portion 20d, heating medium producing means 50, 40 producing the heating medium, and jetting means 26, 61 for jetting the heating medium toward a heated object W in the heating chamber 20, the jetting direction of the heating medium jetted by the jetting means 26, 61 includes the direction between a front face and a side face in the heating chamber 20 in addition to the center direction in the heating chamber 20. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cooking device for cooking a heated object by ejecting a heating medium into a heating chamber.

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 a heating chamber. A water tank is arranged on the side of the heating chamber, and water taken out from the water tank by a water supply 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 jets the superheated steam from the top of the heating chamber in the downward direction so that the object to be heated is cooked.
Japanese Patent Laid-Open No. 2005-61816

  However, according to the above-mentioned conventional cooking device, superheated steam is ejected from the ceiling portion of the heating chamber in the downward direction, and it is difficult for the superheated steam to reach the peripheral portion of the tray. For this reason, there was a problem that heating of the object to be heated arranged in the peripheral part of the saucer occurred and cooking was uneven on the saucer.

  An object of this invention is to provide the heating cooker which eliminates the lack of heating of a peripheral part and can cook with a heating medium.

In order to achieve the above object, the present invention provides a heating chamber provided with an opening for putting in and out an object to be heated on the front surface, a door for opening and closing the opening, a heating medium generating means for generating a heating medium, A heating cooker comprising spraying means for spraying the heating medium toward an object to be heated in the heating chamber,
The ejection direction of the heating medium ejected by the ejection means includes the direction between the front surface and the lateral surface in the heating chamber in addition to the central direction in 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 top surface, the lateral surface, the rear surface, and the like of the heating chamber toward the center of the heating chamber. Thereby, a heating medium contacts a to-be-heated material and cooking is performed. The heating medium is also ejected in the direction between the front surface and the lateral surface of the heating chamber. Thereby, the baking shortage of the peripheral part of a to-be-heated material can be eliminated.

  Further, the present invention is characterized in that, in the cooking device having the above-described configuration, the ejection means is provided on a ceiling portion of the heating chamber.

  According to the present invention, in the cooking device configured as described above, the spraying means protrudes downward from the ceiling portion and extends in a direction parallel to a lateral surface of the heating chamber, and a lateral portion of the heating chamber. An ejection cover having a front surface portion extending in a direction perpendicular to the surface and a corner portion that obliquely connects the front surface portion and the side surface portion, and an air outlet for ejecting the heating medium is provided in the corner portion. It is characterized by that. According to this configuration, the heating medium is ejected from the air outlet provided in the corner portion of the ejection cover provided in the ceiling portion of the heating chamber, between the door and the lateral surface. You may provide an air outlet in the front part and side part of an ejection cover.

  Moreover, the present invention is characterized in that, in the heating cooker configured as described above, the spraying means sprays obliquely downward between a front surface and a lateral surface in the heating chamber. According to this structure, the uniformity of the baking condition in the door vicinity of a to-be-heated material can be improved.

  Further, the present invention is the heating cooker having the above-described configuration, wherein the corner portion is formed on an inclined surface inclined with respect to the top surface of the heating chamber, and extends vertically from the peripheral edge of the air outlet to the inclined surface. It is characterized by having a guide part of the shape. According to this configuration, the heating medium is guided obliquely downward by the guide of the cylindrical guide portion whose axial direction is inclined, and is ejected through the jet port.

  Further, the present invention is characterized in that, in the cooking device having the above-described configuration, the heating medium is further ejected from the ceiling portion of the heating chamber toward both lateral surfaces by the ejection means. 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 lateral surface of the heating chamber and heats the back surface of the object to be heated.

  According to the present invention, in the heating cooker having the above-described configuration, suction means for sucking air from the back surface of the heating chamber is provided. According to this configuration, since the heating medium ejected between the door and the lateral surface is sucked from the back surface of the heating chamber by the suction means, the air current is bent backward.

  According to the present invention, in the heating cooker configured as described above, the heating medium is made of superheated steam.

  According to the present invention, since the heating medium is ejected in the direction between the front surface and the lateral surface of the heating chamber, the heating medium spreads to the corner between the front surface and the lateral surface of the heating chamber to prevent insufficient heating of the peripheral portion. The heated product can be cooked uniformly.

  Further, according to the present invention, since the ejection means is provided in the ceiling portion of the heating chamber, the heating medium can be uniformly supplied to the object to be heated placed on the tray or the like.

  Further, according to the present invention, the jetting means has the jet cover protruding downward from the ceiling portion, and the jet port is provided at the corner portion that obliquely connects the front portion and the side portion of the jet cover. A cooking device that ejects the heating medium in the direction between the front surface and the lateral surface can be easily realized.

  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.

  According to the present invention, the corner portion of the ejection cover is formed on an inclined surface that is inclined with respect to the top surface of the heating chamber, and has a cylindrical guide portion that extends perpendicularly to the inclined surface from the peripheral edge of the jet port. The heating medium can be easily ejected obliquely downward.

  According to the present invention, since the heating medium is ejected from the ceiling portion of the heating chamber toward the both lateral surfaces by the ejection means, the lower surface of the object to be heated can be easily heated.

  Further, according to the present invention, since the air is sucked from the back surface of the heating chamber, it is possible to reduce the high-temperature heating medium that hits the door from the ejection means. Therefore, it is not necessary to suppress the heating of the door and use a door with high heat resistance, and an increase in the cost of the cooking device can be prevented.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a heating cooker according to the first embodiment. The heating cooker 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 10.

  The door 11 is pivotally supported in a vertical plane with the lower end as a center, and a handle 12 for opening and closing the door 11 is provided at the upper part. A central portion 11C of the door 11 is provided with a transmission portion 11a (see FIG. 2) in which heat-resistant glass is fitted to visually recognize the inside. A left side portion 11L and a right side portion 11R provided with metal decorative plates 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 11 </ b> R of the door 11.

  2 is a front view of the heating cooker 1 with the door 11 open. The door 11 is rotated when the handle 12 is gripped and pulled forward, and the posture of the door 11 can be changed by 90 ° from a vertical closed state to a horizontal open state. When the door 11 is opened, the front of the cabinet 10 is exposed.

  A heating chamber 20 is provided at a location corresponding to the central portion 11 </ b> C of the door 11. A water tank chamber 70 is provided at a location corresponding to the left side portion 11L of the door 11, and a water tank 71 for storing water for generating steam is stored therein. No opening is provided at a location corresponding to the right side portion 11R of the door 11, but a control board (not shown) is disposed inside.

  The heating chamber 20 is formed in a substantially rectangular parallelepiped, and the entire front side facing the door 11 is an opening 20d for taking in and out the article to be heated F (see FIG. 7). The opening 20d is opened and closed by the rotation of the door 11. 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 a heat insulation measure.

  FIG. 3 is a front view showing details in the heating chamber 20. On the lateral surface of the heating chamber 20, a plurality of tray support portions 20b and 20c are provided at different heights. The upper tray support part 20 b is provided below the reflection part 68. A stainless steel plate receiving tray 21 is locked to one or more of the tray supporting 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.

  When cooking with superheated steam, the tray 21 is installed in the upper tray support portion 20b. Thereby, superheated steam can be guide | induced to the lower surface of the to-be-heated material F by reflection of the reflection part 68 so that it may mention later. The tray 21 may be installed on the upper and lower tray support portions 20b and 20c. Thereby, many to-be-heated materials F can be cooked at once. At this time, the tray 21 arranged in the tray support portion 20b is formed to have air permeability, and superheated steam is supplied to the lower tray 21.

  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 is provided at the lower left portion. The reflection part 68 is recessed on both lateral surfaces of the heating chamber 20, and the surface is formed by a curved surface. Superheated steam jetted laterally from a jet cover 61 (to 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).

  An ejection cover 61 made of a stainless steel plate that ejects superheated steam is attached to the top surface of the heating chamber 20. 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, 5, and 6 show a perspective view, a plan view, and a side sectional view of the main part of the ejection cover 61. 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 ejection cover 61 is finished in a dark color by surface treatment such as painting on both the upper and lower surfaces. Thereby, the radiation 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.

  For this reason, while suppressing the temperature rise of the vapor | steam temperature rising apparatus 40 (refer FIG. 7) and its outer surface, safety improves and the heating efficiency of the heating chamber 20 improves. You may form the ejection cover 61 with the metal raw material which changes to a dark color by repeated use. Moreover, you may form the ejection cover 61 with a dark-colored ceramic molded product.

  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 with screws. 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.

  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 64 a is formed to extend in a direction parallel to the lateral surface of the heating chamber 20. The front surface portion 64 b is provided on the front surface side of the ejection cover 61 and is formed to extend in a direction perpendicular to the lateral surface of the heating chamber 20. The corner portion 64c connects the side surface portion 64a and the front surface portion 64b obliquely. The back surface portion 64 d is provided on the back surface side of the ejection cover 61 and is formed to extend in a direction parallel to the back wall of the heating chamber 20.

  The planar portion 63 and the inclined surface 64 are provided with a plurality of jet holes 65, 66, 67. A cylindrical guide portion 65 a perpendicular to the flat surface portion 63 is formed at the periphery of the air outlet 65 provided in the flat surface portion 63. Cylindrical guide portions 66 a and 67 a that are perpendicular to the inclined surface 64 are formed at the peripheral edges of the air outlets 66 and 67 provided on the inclined surface 64. Thereby, an airflow can be guided to the axial direction of the jet openings 65, 66, and 67.

  The air inlets 66 and 67 of the inclined surface 64 are larger in diameter than the air outlets 65 of the flat surface portion 63 and are provided with a high density. Further, the blast holes 66 of the side surface portion 64a of the inclined surface 64 are provided at a higher density than the blast port 67 of the front surface portion 64b and the corner portion 64c. In addition, the back surface part 64d of the inclined surface 64 is not provided with the fumarole.

  FIG. 7 shows the internal structure of the heating cooker 1. In the figure, the heating chamber 20 is viewed from the side. The water tank 71 is arranged on the left side of the heating chamber 20 as shown in FIG. 2 described above, and communicates with the water level detection unit 91 via the joint unit 58. Thereby, the water tank 71 is detachable with respect to the cabinet 10 (refer 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 a change in resistance value between the electrodes. In this embodiment, the water level is detected in three stages by four electrodes. When the water level of the water tank 71 falls below a predetermined water level as detected by the water level sensor 56, a notification is given to encourage water supply.

  In the water level detection unit 91, the water supply channel 55 extends to the bottom and is immersed. The water supply passage 55 is provided with a water supply pump 57 in the middle of the route, and is 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 rectangular shape or an oval shape 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 composed of a spiral sheathed heater is immersed in the pot 51. The water in the pot 51 is heated by energization of the steam generating heater 52, and steam is generated.

  A cylindrical isolation wall 51a extending from the upper surface into the spiral steam generation heater 52 is formed in the pot 51, 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 of the pot 51 reaches a predetermined water level, the water supply pump 57 is stopped. Further, by providing the isolation wall 51 a, it is possible to make it difficult to transmit the foaming due to the boiling of water in contact with the steam generating heater 52 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. Thereby, the overflow water in the water supply channel 55 is guided to the water tank 71. The overflow level of the overflow pipe 98 is set higher than the normal water level in the pot 51 and lower than the steam supply duct 34.

  The bottom of the pot 51 is formed in a funnel shape, and a drain pipe 53 is led out from the lower end. A drain valve 54 is provided in the middle of the drain pipe 53. The drain pipe 53 has a gradient of a predetermined angle toward the water tank 71. Thereby, 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.

  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 in the back wall 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 temperature raising device 40 is covered with the ejection cover 61, and the upper surface is covered with the upper cover 47.

  A blower fan 26 comprising a centrifugal fan 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 generator 50 by driving the blower fan 26 flows into the circulation duct 35 through the steam supply duct 34. Further, the steam in the heating chamber 20 is sucked from the intake port 28, and is jetted from the jet ports 65, 66 and 67 of the jet cover 61 through the circulation duct 35 and circulates.

  Therefore, the blower fan 26 and the jet ports 65, 66, 67 of the jet cover 61 constitute jetting means for jetting superheated steam into the heating chamber 20. Further, the blower fan 26 and the intake port 28 constitute suction means for sucking air and steam from the heating chamber 20. Since the blowing means and the suction means are configured by the common blower fan 26, the cost increase of the heating cooker 1 can be suppressed.

  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.

  An exhaust duct 33 that branches via an electric damper 48 is provided at the upper part of the circulation duct 35. The exhaust duct 33 has an open end that faces 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 facing the outside, and naturally exhausts the steam in the heating chamber 20. In addition, when mounting a magnetron in the heating cooker 1 and cooking by a microwave, outside air is inhaled through the exhaust duct 32.

  The steam temperature raising device 40 includes a steam heater 41 including a sheathed heater, and further heats the steam generated by the steam generator 50 to generate superheated steam. Therefore, the steam generator 50 and the steam temperature raising device 40 constitute a heating medium generating unit that generates a heating medium made of superheated steam. The steam temperature raising device 40 is disposed at the center of the ceiling of the heating chamber 20 as viewed in plan. Moreover, the area is narrower than the top surface of the heating chamber 20, and it is formed in a small volume 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 microprocessor and a memory. The control device 80 includes a blower fan 26, a steam heater 41, a damper 48, a steam generation heater 52, a drain valve 54, a water supply pump 57, an operation panel 13, a pot water level sensor 81, a water level sensor 56, a temperature sensor 82, and a humidity sensor 83. Is connected. The cooking device 1 is driven by controlling each part according to a predetermined program by the control device 80.

  The operation panel 13 has a display unit (not shown) and displays the control status on the display unit. In addition, an 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) that emits various sounds. The temperature sensor 82 detects the temperature in the heating chamber 20. The humidity sensor 83 detects the humidity in the heating chamber 20.

  In the heating cooker 1 having the above-described configuration, 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 full 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, the operation panel 13 is operated, a menu is selected, and a start key (not shown) is pressed to start a cooking sequence. Thereby, the feed water pump 57 starts operation and water is supplied to the steam generator 50. At this time, the drain valve 54 is closed.

  When the water supply pump 57 is driven, water is supplied 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.

  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 at the time when the water in the pot 51 reaches a predetermined temperature. The steam in the heating chamber 20 is sucked into the circulation duct 35 from the intake port 28 by driving the blower fan 26. 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 temperature raising device 40.

  The steam that has flowed into the steam temperature raising device 40 is heated by the steam heater 41 to become superheated steam of 100 ° C. or higher. Usually, superheated steam whose temperature is increased from 150 ° C. to 300 ° C. is used. A part of the superheated steam is ejected from the fumarole 65 in the direction directly below (arrow A). As a result, the superheated steam is ejected toward the center in the heating chamber 20, and the upper surface of the article to be heated F comes into contact with the superheated steam. Further, as shown in the front view of FIG. 9, a part of the superheated steam is ejected from the ejection port 66 in a diagonally downward direction (arrow B) on the side. The superheated steam ejected in the direction of arrow B is reflected by the reflecting portion 68 and guided below the object to be heated F. Thereby, the lower surface of the to-be-heated material F contacts with superheated steam.

  When the surface of the object to be heated F is 100 ° C. or less, the superheated steam is condensed on the surface of the object to be heated F. Since this condensation heat is as large as 539 cal / g, a large amount of heat can be given to the heated object F in addition to the convection heat transfer.

  In addition, a part of the superheated steam is ejected in a slanting downward direction (arrow C) from the air outlet 67 formed in the front surface portion 64 b of the ejection cover 61 toward the door 11. 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 air flow of superheated steam blown forward is bent and guided backward. Thereby, a part of superheated steam collides with the front part of the upper surface of the to-be-heated material F, and a part is guide | induced below the to-be-heated material F from the front. As a result, the superheated steam reaches the front portion of the heating chamber 20 to prevent insufficient heating of the front portion of the heated object F, and the heated object F can be cooked uniformly.

  Further, a part of the superheated steam is ejected obliquely downwardly from the jet port 67 formed in the corner portion 64 c of the ejection cover 61 toward the direction between the front surface and the lateral surface in the heating chamber 20. Thereby, superheated steam spreads to the front corner of the heating chamber 20, prevents insufficient heating of the front portion of the heated object F, and allows the heated object F to be cooked more uniformly.

  Moreover, since the superheated steam in the heating chamber 20 is sucked from the intake port 28, the high-temperature superheated steam that directly hits the door 11 can be reduced. Therefore, it is not necessary to suppress the heating of the door 11 and use the door 11 having high heat resistance, and the cost increase of the heating cooker 1 can be prevented.

  When the suction force of the blower fan 26 is reduced, the airflow of superheated steam blown forward is bent at the lower part of the heating chamber 20. Thereby, more superheated steam can be guide | induced to the lower surface of the to-be-heated material F. FIG. When the suction force of the blower fan 26 is increased, the airflow of superheated steam blown forward is bent at the upper part of the heating chamber 20. Thereby, more superheated steam can be guide | induced to the upper surface of the to-be-heated material F. FIG.

  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.

  The superheated steam ejected from the air outlets 65, 66, 67 gives heat to the article F to be heated, and is then sucked into the circulation duct 35 from the air inlet 28 and flows into the steam temperature raising device 40. Thereby, the steam in the heating chamber 20 is repeatedly circulated for cooking.

  When cooking is completed, the control device 80 displays the end of cooking on the display unit of the operation panel 13 and notifies a signal sound. When the door 11 is opened by the user who is informed of the end of cooking, the damper 48 is opened, and the steam in the heating chamber 20 is rapidly forcedly exhausted from the exhaust duct 33. Thereby, the user can take out the to-be-heated material F from the inside of the heating chamber 20 safely, without touching high temperature steam.

  According to the present embodiment, the heating medium made of superheated steam is ejected in the direction between the front surface and the lateral surface in the heating chamber 20 by the ejecting means having the blower fan 26 and the jet cover 61. A heating medium spreads over the part to prevent insufficient heating, and the object to be heated F can be cooked uniformly.

  Moreover, since the suction means including the air inlet 28 and the blower fan 26 sucks air from the back surface of the heating chamber 20, it is possible to reduce the high-temperature heating medium that hits the door 11 from the ejection means. Therefore, it is not necessary to suppress the heating of the door 11 and use the door 11 having high heat resistance, and the cost increase of the heating cooker 1 can be prevented.

  In addition, even if it is a case where the blowing port 67 is not provided in the front part 64b of the blowing cover 61, if it ejects from the blowing port 67 of the corner part 64c, the front part of the heating chamber 20 can be heated. In other words, the superheated steam ejected from the air outlet 67 of the corner portion 64 c changes its direction from the corner of the heating chamber 20 to the direction along the door 11. Thereby, superheated steam spreads to the front part of the to-be-heated material F, and can prevent insufficient heating. At this time, the superheated steam sprayed near the boundary between the door 11 and the horizontal surface of the heating chamber 20 is distributed and distributed on the door 11 side and the horizontal surface side. For this reason, even if it is a case where a suction means is not provided, overheating of the door 11 can be suppressed.

  In addition, since the heating medium is ejected obliquely downward from the air outlet 67 of the ejection cover 61, the heating medium quickly reaches the front portion of the object to be heated F on the rack 22. Thereby, the temperature fall of a heating medium can be reduced and the insufficient heating of the to-be-heated material F can be reduced more.

  A shutter that changes the opening area of the air outlet 67 and a shutter that changes the opening area of the air inlet 28 may be provided. As a result, the ejection speed from the air outlet 67 can be reduced and the suction from the air inlet 28 can be increased to further reduce the superheated steam reaching the door 11. In addition, it is possible to increase the amount of heating at the front portion of the heating chamber 20 by increasing the ejection speed from the ejection port 67 and weakening the suction from the intake port 28.

  Next, FIG. 10 is a figure which shows the structure of the heating cooker of 2nd Embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. In the present embodiment, an exhaust fan 31 is provided in the exhaust duct 32. Other parts are the same as those of the first embodiment.

  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 32 a 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 32 a by driving the blower fan 26 and the exhaust fan 31. Due to this suction force, the airflow of superheated steam ejected toward the door 11 is bent and guided backward. Thereby, a part of superheated steam collides with the front part of the upper surface of the to-be-heated material F, and a part is guide | induced below the to-be-heated material F from the front.

  According to the present embodiment, similarly to the first embodiment, superheated steam reaches the front of the heating chamber 20 to prevent insufficient heating of the front of the heated object F and cook the heated object F uniformly. Can do. Further, since the air is sucked from the intake port 28, high-temperature superheated steam that directly hits the door 11 can be reduced. Therefore, it is not necessary to suppress the heating of the door 11 and use the door 11 having high heat resistance, and the cost increase of the heating cooker 1 can be prevented.

  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 figure which shows the structure of the heating cooker of 3rd Embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those of the second embodiment shown in FIG. In the present 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. Other parts are the same as those of the second embodiment.

  A suction means for sucking the heating chamber 20 from the back is constituted by an exhaust port 32 a 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 ejected toward the door 11 is bent and guided backward. Thereby, a part of superheated steam collides with the front part of the upper surface of the to-be-heated material F, and a part is guide | induced below the to-be-heated material F from the front.

  FIG. 11 shows a case where the rotational speed of the exhaust fan 32 is small. As indicated by an arrow C, the amount of superheated steam guided below the object to be heated 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 an arrow C ′, the rack 2 is sucked rearward with a strong suction force above the rack 2, so that the amount of superheated steam guided above the article to be heated F increases.

  FIG. 13 shows a case where the exhaust fan 32 is stopped. As indicated by an arrow C ″, the superheated steam ejected from the ejection cover 61 circulates along the door 11. As a result, the exhaust fan 32 is stopped only for a short time to remove condensation on the door 11, and the transmission portion. The visibility of 11a (refer FIG. 2) can be improved.

  According to the present embodiment, similarly to the second embodiment, the superheated steam reaches the front of the heating chamber 20 to prevent insufficient heating of the front of the heated object F and cook the heated object F uniformly. Can do. Further, since the air is sucked from the intake port 28, high-temperature superheated steam that directly hits the door 11 can be reduced. Therefore, it is not necessary to suppress the heating of the door 11 and use the door 11 having high heat resistance, and the cost increase of the heating cooker 1 can be prevented.

  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.

  In the first to third embodiments, superheated steam is jetted obliquely downward from the jet port 67 of the front part 64b and the corner part 64c of the jet cover 61, but it may be jetted in the horizontal direction. Further, although superheated steam is used as a heating medium for heating the article to be heated F, other heating medium such as heated air may be used.

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

The external appearance perspective view which shows the heating cooker of 1st Embodiment of this invention. The front view which shows the state which opened the door of the heating cooker of 1st Embodiment of this invention. The front view which shows the heating chamber of the heating cooker of 1st Embodiment of this invention. The perspective view which shows the ejection cover of the heating cooker of 1st Embodiment of this invention. The top view which shows the ejection cover of the heating cooker of 1st Embodiment of this invention. Side surface sectional drawing which shows the ejection cover of the heating cooker of 1st Embodiment of this invention. The figure which shows the internal structure of the heating cooker of 1st Embodiment of this invention. The block diagram which shows the structure of the heating cooker of 1st Embodiment of this invention. The front view which shows the heating cooker of 1st Embodiment of this invention. The figure which shows the internal structure of the heating cooker of 2nd Embodiment of this invention. The figure which shows the internal structure of the heating cooker of 3rd Embodiment of this invention. The figure which shows the internal structure of the heating cooker of 3rd Embodiment of this invention. The figure which shows the internal structure of the heating cooker of 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating cooker 11 Door 20 Heating chamber 21 Receptacle 26 Blower fan 28 Inlet 31 Exhaust fan 32, 33 Exhaust duct 34 Steam supply duct 35 Circulation duct 40 Steam temperature rising device 41 Steam heater 47 Outer cover 48 Damper 50 Steam generator 51 Pot 52 Steam generating heater 54 Drain valve 55 Water supply path 56 Water level sensor 57 Water supply pump 61 Spout cover 63 Flat surface portion 64 Inclined surface 64a Side surface portion 64b Front surface portion 64c Corner portion 65, 66, 67 Fumarole 65a, 66a, 67a Guide portion 68 Reflecting part 71 Water tank 81 Pot water level sensor 91 Water level detecting part F Object to be heated

Claims (8)

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 to be heated in the heating chamber A cooking device provided with spraying means for spraying toward the
The heating cooker characterized in that the ejection direction of the heating medium ejected by the ejection means includes the direction between the front surface and the lateral surface of the heating chamber in addition to the central direction in the heating chamber.   The cooking device according to claim 1, wherein the ejection unit is provided in a ceiling portion of the heating chamber.   The jetting means protrudes downward from the ceiling portion, and extends in a direction parallel to the lateral surface of the heating chamber, a front surface portion extending in a direction perpendicular to the lateral surface of the heating chamber, and the front surface 3. The heating according to claim 2, further comprising an ejection cover having a corner portion that obliquely connects between a portion and the side surface portion, and an air outlet that ejects the heating medium is provided in the corner portion. Cooking device.   The cooking device according to claim 3, wherein the spraying means sprays obliquely downward between a front surface and a lateral surface in the heating chamber.   The corner portion is formed on an inclined surface that is inclined with respect to the top surface of the heating chamber, and includes a cylindrical guide portion that extends perpendicularly to the inclined surface from a peripheral edge of the jet port. Item 5. A cooking device according to item 4.   The cooking device according to any one of claims 1 to 5, wherein the heating medium is further ejected from the ceiling portion of the heating chamber toward both lateral surfaces by the ejection means.   The cooking device according to any one of claims 1 to 6, further comprising suction means for sucking air from a back surface of the heating chamber.   The cooking device according to any one of claims 1 to 7, wherein the heating medium is made of superheated steam.

Images