JP4555805B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device that cooks an object to be heated with steam.

  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 detachably provided on the side of the heating chamber, and water is supplied from the water tank to the steam generator through a water supply channel. 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 into the heating chamber to cook the object to be heated. Moreover, cooking of a to-be-heated object can be performed by ejecting saturated steam into a heating chamber.

  Patent Document 2 discloses a cooking device in which an air circulation layer is provided between a water tank and a heating chamber. In this cooking device, when a cooling fan provided in the housing is driven, air flows through the air circulation layer between the water tank and the heating chamber to cool the water tank. Thereby, a user's discomfort by holding the water tank heated at the time of removal | desorption of a water tank can be prevented.

Japanese Patent Laid-Open No. 2005-61816 Japanese Patent No. 3503896

  However, according to the cooking device disclosed in Patent Document 2, the outer wall of the heating chamber is cooled by the air flowing through the air circulation layer. For this reason, there has been a problem that heat is taken from the heating chamber and thermal efficiency is lowered. Also, condensation occurs on the inner wall of the heating chamber cooled by the air circulation layer during cooking with saturated steam. For this reason, since the frequency which discards dew condensation water by a user increases, there existed a problem that the convenience of a heating cooker worsened.

  An object of this invention is to provide the heating cooker which can improve a thermal efficiency and can prevent dew condensation.

  In order to achieve the above object, the present invention comprises a heating chamber in which an object to be heated is installed, a detachable water tank, and a steam generating unit that generates steam by supplying water from the water tank, In a heating cooker that cooks an object to be heated using steam generated in a section, a heat insulating material provided between the heating chamber and the water tank, and a heat insulating material provided between the heat insulating material and the water tank It is characterized by comprising an air heat insulation layer that retains and insulates air, and an air circulation layer that is provided on a side different from the air heat insulation layer side of the water tank and through which air can flow.

  According to this configuration, water is supplied from the water tank to the steam generation unit, and the saturated steam generated in the steam generation unit and superheated steam obtained by further heating the saturated steam are supplied into the heating chamber. An object to be heated is cooked using this saturated steam or superheated steam. The water tank is detachably provided, and is attached to, for example, a side of the heating chamber via a heat insulating material and an air heat insulating layer. An air circulation layer is provided on a side different from the air heat insulation layer side of the water tank, and the water tank is cooled by air flowing through the air circulation layer by natural convection or forced convection. At this time, the air in the air heat insulation layer stays and the heating chamber is insulated by the heat insulation material and the air heat insulation layer. The heat insulating material is made of glass wool or vacuum heat insulating material.

  Moreover, in the heating cooker according to the present invention, the heating cooker having the above configuration includes a storage case that guides the water tank at the time of attachment and detachment and stores the water tank, and an outer surface of the storage case is the air circulation layer. It is preferable to face. According to this configuration, the storage case is mounted, for example, on the side or below the heating chamber via the heat insulating material and the air heat insulating layer. The water tank is cooled via the storage case by the air flowing through the air circulation layer by natural convection or forced convection.

  Moreover, in the cooking device according to the present invention, in the cooking device configured as described above, the water tank is disposed on a side of the heating chamber, and the air heat insulating layer is formed on both sides by the storage case and the heat insulating material. Is preferably closed. According to this configuration, the storage case is attached to the side of the heating chamber via the heat insulating material and the air heat insulating layer, and the air heat insulating layer is adjacent to the side wall of the storage case.

  Moreover, in the cooking device according to the present invention, in the cooking device configured as described above, it is preferable that the air heat insulating layer is closed on the upper surface, the front surface, and the back surface by a shielding member. According to this configuration, the air in the air heat insulation layer is retained by covering the upper surface, the front surface, and the back surface of the air heat insulation layer with the shielding member.

  Moreover, in the cooking device according to the present invention, in the cooking device configured as described above, it is preferable that the shielding member is integrally formed with the storage case.

  Moreover, in the cooking device according to the present invention, in the cooking device configured as described above, it is preferable that the shielding member includes a plurality of members, and a part of the shielding member is integrally formed with the storage case.

  Moreover, in the cooking device according to the present invention, in the cooking device configured as described above, the water tank is disposed on the side of the heating chamber, and the air heat insulating layer is blocked on the upper surface, the front surface, and the rear surface by a shielding member. It is preferable that

  Moreover, in the cooking device according to the present invention, in the cooking device configured as described above, it is preferable that the bottom surface of the air heat insulation layer is closed by the shielding member.

  Moreover, in the cooking device according to the present invention, in the cooking device configured as described above, steam is ejected from the ceiling surface of the heating chamber, and the water tank is disposed facing the lower portion of the side wall of the heating chamber. It is preferable. According to this configuration, the steam generated by the steam generator is ejected from the ceiling of the heating chamber, and the temperature is lowered when descending the heating chamber.

  Moreover, in the cooking device according to the present invention, it is preferable that a cooling fan for circulating air in the air circulation layer is provided in the cooking device configured as described above. According to this configuration, air flows through the air circulation layer by driving the cooling fan, and the water tank is cooled.

  Moreover, in the cooking device according to the present invention, in the cooking device configured as described above, the circuit board is preferably disposed on the same side as the water tank with respect to the heating chamber. According to this configuration, the circuit board on which the switching power supply, relay, IGBT, and the like are mounted is cooled together with the water tank by natural convection or forced convection.

  Moreover, in the heating cooker according to the present invention, in the heating cooker having the above-described configuration, a high-frequency generator that performs high-frequency heating by supplying a high frequency to the heating chamber is on the same side as the water tank with respect to the heating chamber. It is preferable to arrange. According to this configuration, cooking is performed by high-frequency heating the object to be heated by driving the high-frequency generator. The high frequency generator is cooled with the water tank by natural convection or forced convection.

  According to the present invention, the heat insulating material and the air heat insulating layer are provided between the heating chamber and the water tank, and the air circulation layer is provided on the side different from the air heat insulating layer side of the water tank. It is possible to insulate the heating chamber at a low cost to improve thermal efficiency and to prevent condensation in the heating chamber. Moreover, the water tank can be easily cooled by the air flowing through the air circulation layer, and uncomfortable feelings caused by gripping the heated water tank when the water tank is attached or detached can be prevented.

  Also, if the outer surface of the storage case that stores the water tank faces the air circulation layer by guiding the water tank when it is attached and detached, it is possible to cool the water tank through the storage case and easily attach the water tank. it can.

  Further, if both sides of the air insulating layer are closed by the storage case and the heat insulating material, the heating chamber side of the storage case can be easily insulated.

  In addition, if the upper surface, the front surface, and the rear surface of the air heat insulating layer are blocked by the shielding member, an air heat insulating layer that retains the air flow can be easily realized. Moreover, if the shielding member is integrally formed with the storage case, the number of parts can be reduced.

  Moreover, if the bottom surface of the air heat insulation layer is closed by the shielding member, the air flow in the air heat insulation layer can be retained more reliably, and the heat insulation effect can be improved.

  Further, when steam is ejected from the ceiling surface of the heating chamber and a water tank is disposed facing the lower part of the side wall of the heating chamber, the water tank can be disposed below and easily attached and detached. Further, although the lower temperature of the heating chamber tends to cause dew condensation due to the lowered temperature, the dew condensation in the lower portion of the heating chamber can be easily prevented by the heat insulating material and the air heat insulating layer facing the water tank.

  Moreover, if a cooling fan for circulating air in the air circulation layer is provided, the water tank can be reliably cooled.

  Further, if the circuit board is disposed on the same side as the water tank with respect to the heating chamber, the circuit board cooling mechanism and the water tank cooling mechanism can be made common. Therefore, space saving of the heating cooker can be achieved.

  If the high frequency generator is arranged on the same side as the water tank with respect to the heating chamber, the cooling mechanism of the high frequency generator and the cooling mechanism of the water tank can be shared. Therefore, space saving of the heating cooker can be achieved.

  Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a front view and a side view showing a heating cooker according to an 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 has a horizontal pivot shaft and is pivotally supported so as to be rotatable in a vertical plane around the lower portion. A handle 12 for opening and closing the door 11 is provided at the upper portion. A central portion 11C of the door 11 is provided with a transmissive portion (not shown) that is fitted with heat-resistant glass so that the inside can be visually recognized. On the right side of the central portion 11C, an operation panel 13 is provided on the right side portion 11R provided with a metal decorative plate on the surface.

  FIG. 3 shows a front view of the heating cooker 1 with the door 11 opened. 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 in the cabinet 10. The heating chamber 20 is formed in a substantially rectangular parallelepiped, and the entire front side facing the door 11 is an opening for taking in and out the article to be heated F (see FIG. 7). The opening 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 peripheral portion on the front side of the heating chamber 20 is covered with a front panel 75.

  Support portions 20a, 20b, and 20c that support the tray 21 (see FIG. 7) are arranged in parallel in the vertical direction on the side wall of the heating chamber 20. A storage case 70 is provided at the lower right side of the heating chamber 20 and stores a detachable water tank 71 for storing water for generating steam.

  FIG. 4 is a front view schematically showing a state in which the front panel 75 is removed. On both sides of the heating chamber 20, heat insulating materials 76 and 77 made of glass wool or the like are provided in contact with the outer surface. Thereby, the heating chamber 20 is insulated and the heat radiation into the cabinet 10 is suppressed. In other words, a decrease in the temperature in the heating chamber 20 is suppressed, and the temperature in the heating chamber 20 is kept. You may comprise the heat insulating materials 76 and 77 by a vacuum heat insulating material.

  FIG. 5 is a perspective view showing the storage case 70. The storage case 70 is made of a resin molded product, and a storage portion 70a in which the water tank 71 is stored is formed to open to the front surface. The water tank 71 is guided by the storage portion 70a and can be easily attached and detached. The storage case 70 is integrally formed with a U-shaped shielding member 87 that extends laterally from the storage portion 70a. Thereby, the number of parts can be reduced. The shielding member 87 includes a front surface portion 87a, an upper surface portion 87b, and a back surface portion 87c that shield the front surface, the upper surface, and the back surface, respectively.

  End surfaces of the front surface portion 87 a, the upper surface portion 87 b, and the back surface portion 87 c are arranged so as to be in close contact with the heat insulating material 77. Thereby, the space surrounded by the front surface portion 87a, the upper surface portion 87b, the back surface portion 87c, and the heat insulating material 77 becomes the air heat insulating layer 78 in which the circulation of air stays. The heat insulation layer 78 further suppresses heat radiation from the heating chamber 20.

  In this case, the size of the surface of the air heat insulating layer 78 facing the storage case 70 is substantially the same as the size of the surface of the storage case 70 facing the heating chamber 20. Note that the size of the surface of the air heat insulating layer 78 facing the heating chamber 20 is preferably close to the same size as one side surface forming the heating chamber 20. By doing so, the heat radiation of the heating chamber 20 on one side surface of the heating chamber 20 can be suppressed.

  In addition, the accommodating part 70a and the air heat insulation layer 78 may be partially communicated by a hole or the like. In this case, the communicating part such as the hole is closed by the water tank 71 when the water tank is stored. By doing so, the temperature of the water in the water tank 71 is easily raised, and the efficiency of steam generation is improved. However, it is preferable to cool the water tank 71 as will be described later so as not to raise the temperature excessively.

  In the present embodiment, as described above, the front surface portion 87a, the upper surface portion 87b, and the back surface portion 87c of the shielding member 87 are integrally formed in the storage case 70. The shielding member 87 may be formed from a plurality of members, and a part of the front surface portion 87a, the upper surface portion 87b, and the back surface portion 87c may be formed integrally with the storage case 70. For example, only the upper surface portion 87 b may be integrally formed with the storage case 70, and the air insulating layer 78 may be formed by using a shielding member separate from the storage case 70 for the front surface portion 87 a and the back surface portion 87 c. Further, the shielding member 87 may be provided separately from the storage case 70 without being integrally formed with the storage case 70. Or you may arrange | position between the heat insulating material 77 and the storage case 70 the box (for example, the thing which 6 surfaces are closed, or a thing with an opening in part) which covers the air heat insulation layer 78.

  In FIG. 4, a cooling fan 80 is provided above the storage case 70. An air inlet 10a is formed on the lower surface of the right end of the cabinet 10, and an air outlet 10b is formed on the upper portion of the left side. An air circulation layer 79 composed of a space is provided between the right side surface of the storage case 70 and the cabinet 10.

  FIG. 6 is a perspective view showing a state in which the front panel 75 and the outer wall of the cabinet 10 are removed. A circuit board 82 is provided behind the storage case 70 and behind the cooling fan 80. A heating element such as a switching power source, a relay, and an IGBT is mounted on the circuit board 82. The air circulation layer 79 (see FIG. 4) communicates with the rear of the storage case 70 and the rear of the cooling fan 80, and the space above the rear of the cooling fan 80 communicates with the space on the right side of the cooling fan 80.

  The cooling fan 80 is composed of a sirocco fan, and sucks air in the axial direction from the right side and exhausts it forward. A duct 84 leading to the upper side of the heating chamber 20 is formed in front of the cooling fan 80, and the duct 84 is provided so as to extend to the air outlet 10 b through the front of the steam heating device 40 described later.

  When the cooling fan 80 is driven, outside air flows into the cabinet 10 from the air inlet 10a and flows through the air circulation layer 79. Thereby, the water tank 71 is cooled via the storage case 70. The air that has cooled the water tank 71 flows through the rear of the storage case 70 and the rear of the cooling fan 80, cools the circuit board 82, and is sucked into the cooling fan 80. Exhaust air from the cooling fan 80 flows through the duct 84 and flows out from the air outlet 10b.

  The air outlet 10b may be opened at the front part of the side wall of the heating chamber 20. At this time, when the door 11 is closed, a part of the door 11 enters into the heating chamber 20, and the air flowing out from the air outlet 10 b is opened from the side of the portion of the door 11 that has entered the heating chamber 20. 11 to flow into. Further, the air flowing through the door 11 flows out from the side surface of the portion that has entered the heating chamber 20 on the side opposite to the inflow side, and is exhausted through an opening provided on the side wall of the heating chamber 20. Thereby, when the door 11 is opened, the wind is blown out so as to cross the opening on the front surface of the heating chamber 20, and the role of the air curtain can be achieved. In addition, when the door 11 is closed, the door 11 is cooled by the air flowing through the door 11.

  At this time, since air does not flow through the air heat insulating layer 78, the heating chamber 20 is prevented from being cooled through the heat insulating material 77. Accordingly, it is possible to make it difficult for condensation to occur in the heating chamber 20 during cooking with saturated steam, which will be described later. Further, on the air circulation layer 79 side of the storage case 70, rod-like or plate-like ribs may be integrally formed as a cooling promoting member, or a heat sink may be provided. As a result, the storage case 70 has an increased contact area with air, improving the heat exchange efficiency, and the storage case 70 and the water tank 71 are more easily cooled.

  FIG. 7 shows a schematic structure of the inside of the heating cooker 1. In the figure, the heating chamber 20 is viewed from the side. A tray 21 is provided in the heating chamber 20, and a stainless steel wire rack 22 on which the article to be heated F is placed is placed on the tray 21.

  As shown in FIG. 3, the water tank 71 is disposed on the right side of the heating chamber 20 and communicates with the tank water level detection container 91 through the joint portion 58. Thereby, the water tank 71 is detachable with respect to the cabinet 10 (refer FIG. 2). The tank water level detection container 91 is provided with a tank water level detection unit 56 that detects the water level of the water tank 71. The tank water level detection unit 56 has a plurality of electrodes, and detects the water level of the water tank 71 by conduction between the electrodes.

  In addition, a water supply path 55 extends to the bottom of the tank water level detection container 91 and is immersed therein. A water supply pump 57 is provided in the middle of the water supply path 55 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 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 generating heater 52 is formed in the pot 51, and a pot water level detection unit 81 for detecting the water level in the pot is provided in the isolation wall 51a. The pot water level detection unit 81 has a plurality of electrodes, and detects the water level of the pot 51 by conduction between the electrodes.

  By providing the isolation wall 51 a, it is possible to make it difficult to transmit foaming due to boiling of water in contact with the steam generating heater 52 to the pot water level detection unit 81. Thereby, the detection accuracy of the pot water level detection part 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 tank water level detection container 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 predetermined angle of inclination toward the inlet of 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.

  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 radiant heat of the steam heater 41 is absorbed and radiated from the lower surface of the ejection cover 61 to the heating chamber 20. In addition, the ejection cover 61 is formed so as to protrude into the heating chamber 20, and a plurality of air outlets 65 are provided on the lower surface, and a plurality of air outlets 67 are provided on the front surface.

  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 and 67 of the jet cover 61 through the circulation duct 35 and circulates.

  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 the high frequency generator in the heating cooker 1 and cooking by microwaves, outside air is sucked in 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. The steam temperature raising device 40 is disposed at the center of the ceiling of the heating chamber 20 as viewed in plan. The steam temperature raising device 40 has a small area with respect to the top surface of the heating chamber 20 and is formed in a small volume so that high heating efficiency can be obtained.

  A steam supply duct 42 (see FIG. 6) is led out on both side surfaces of the steam temperature raising device 40. The steam supply duct 42 is disposed along both side walls of the heating chamber 20, and communicates with side surface air outlets 43 provided on both side walls of the heating chamber 20. The side jet port 43 is provided above the center of the heating chamber 20 in the vertical direction.

  In the heating cooker 1 having the above-described configuration, the door 11 is opened, the water tank 71 is pulled out from the storage case 70, and is pushed into the storage case 70 when water is supplied to the upper limit water level. As a result, the water tank 71 is connected to the tank water level detection container 91 by the joint portion 58.

  The object to be heated F is placed on the rack 22, and the tray 21 on which the rack 22 is mounted is installed on the uppermost support portion 20a. Thereby, higher-temperature steam ejected from the upper part of the heating chamber 20 can collide with the article F to be heated. In addition, when there are many to-be-heated materials F, the tray 21 is divided and installed in several steps.

  When the door 11 is closed, a menu is selected by operating the operation panel 13, and a start key (not shown) is pressed, the cooking sequence starts. 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.

  The water supply pump 57 is driven to supply water into the pot 51 through the water supply passage 55, and the water supply is stopped when the pot 51 reaches a predetermined water level. At this time, the water level of the water tank 71 is monitored by the tank water level detection unit 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). Thereby, the upper surface of the to-be-heated material F contacts with superheated steam.

  Further, a part of the superheated steam is ejected from the side air outlet 43 through the steam supply duct 42. The superheated steam ejected from the side air outlet 43 is reflected by the tray 21 and guided upward. 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.

  Further, a part of the superheated steam is ejected obliquely downward (arrow C) toward the door 11 from an air outlet 67 formed on the front surface 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 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 to the downward direction of 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.

  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 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 gas jet ports 65 and 67 and the side gas jet port 43 gives heat to the article F to be heated, and then is 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 the pot water level detection unit 81 detects that the water level of the pot 50 has decreased, the water supply pump 57 is driven and water is supplied from the water tank 71 to the pot 50.

  When cooking ends, the end of cooking is displayed on the display unit of the operation panel 13 and a signal sound is notified. 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.

  In addition, although the superheated steam is spouted out in the heating chamber 20, the heating cooking by the radiant heat of the steam heater 41 may be performed. In addition, cooking may be performed by supplying a high frequency into the heating chamber 20 by a high frequency generator disposed below the heating chamber 20 and heating the object to be heated at a high frequency.

  Moreover, steamed dishes can be cooked by blowing saturated steam into the heating chamber 20. At this time, since saturated steam is ejected from the jet ports 65 and 67 and the side jet ports 43 provided in the upper portion of the heating chamber 20, the temperature becomes low in the lower portion of the heating chamber 20. Thereby, dew condensation is likely to occur in the lower part of the heating chamber 20.

  However, the water tank 71 is provided opposite to the lower part of the right side wall of the heating chamber 20, and even if an air flow for cooling the water tank 71 is generated by the cooling fan 80, the heating chamber 20 is separated by the heat insulating material 77 and the air heat insulating layer 78. Insulated. Therefore, condensation on the right side wall of the heating chamber 20 can be made difficult to occur. The air heat insulating layer 78 may be formed extending to the upper part of the heating chamber 20. In addition, since the upper and lower surfaces of the left side of the heating chamber 20 are closed by the cabinet 10, dew condensation hardly occurs on the left side wall of the heating chamber 20.

  According to this embodiment, since the heat insulating material 77 and the air heat insulating layer 78 are provided between the heating chamber 20 and the water tank 71, the heat chamber 20 is insulated by the heat insulating material 77 and the air heat insulating layer 78 to improve the thermal efficiency. At the same time, condensation in the heating chamber 20 can be made difficult to occur. Thereby, the frequency which discards the dew condensation water which accumulates in the heating chamber 20 decreases, and the convenience of the heating cooker 1 improves. Moreover, the heat insulating material 77 can be made thin and the cost reduction of the heating cooker 20 can be aimed at.

  In particular, since steam is ejected from the upper part of the heating chamber 20 and the water tank 71 is disposed facing the lower part of the heating chamber 20 where condensation is likely to occur, the effect of preventing condensation by the air heat insulation layer 78 on the side of the water tank 71 is obtained. large. In addition, the water tank 71 can be easily attached and detached by arranging it below.

  Furthermore, an air circulation layer 79 is provided on the side of the water tank 71 that is different from the side of the air heat insulation layer 78 (in this embodiment, the side away from the heating chamber 20, in other words, the side opposite to the air heat insulation layer 78 side of the water tank 71). Since the water tank 71 is provided, the water tank 71 can be easily cooled by the air flowing through the air circulation layer 79, and the discomfort caused by gripping the heated water tank 71 when the water tank 71 is attached or detached can be prevented. Although air flows through the air circulation layer 79 by forced convection by the cooling fan 80, the water tank 71 may be cooled by air flowing through the air circulation layer 79 by natural convection.

  In addition, since the outer surface of the storage case 70 that guides the water tank 71 when it is attached / detached and stores the water tank 71 faces the air circulation layer 79, the water tank 71 can be cooled and the water tank 71 can be easily attached. Note that an opening may be provided in the outer wall of the storage case 20 so that the air flowing through the air circulation layer 79 is in direct contact with the water tank 71.

  In addition, the air heat insulating layer 78 that retains the air flow can be easily realized by the shielding member 87 that closes the upper surface, the front surface, and the back surface on the side of the storage case 20. As indicated by the alternate long and short dash line C in FIG. 5 described above, if the bottom surface of the air heat insulation layer 78 is blocked by the shielding member 87, the air flow can be retained more reliably and the heat insulation effect can be improved.

  Further, since the circuit board 82 is disposed on the same side as the water tank 71 with respect to the heating chamber 20, the cooling mechanism for the circuit board 82 and the cooling mechanism for the water tank 71 can be shared. Therefore, space saving of the heating cooker 1 can be achieved. The high frequency generator may be disposed on the same side as the water tank 71 with respect to the heating chamber 20.

  Further, when the circuit board 82 and the high frequency generator are arranged on the same side as the water tank 71 with respect to the heating chamber 20, than when arranged on a different side (for example, the side facing the water tank 71 with respect to the heating chamber 20). Can also improve thermal efficiency. That is, since it is necessary to cool the circuit board 82 and the high-frequency generator, the surfaces where the circuit board 82 and the high-frequency generator of the heating chamber 20 are respectively disposed (two surfaces in this case) if they are installed on different sides. ) Will be cooled. However, if they are arranged on the same side, only one surface of the heating chamber 20 is cooled, so that the thermal efficiency is improved. Therefore, it is preferable to collect as many parts, devices, and circuit boards that require forced cooling as possible to reduce the number of surfaces to be cooled in the heating chamber 20 as much as possible. It is more preferable to arrange all of them together on one side of the heating chamber 20.

  In the present embodiment, the water tank 71 is disposed on the right side of the heating chamber 20 when the heating cooker 1 is viewed from the front, but may be provided on the left side, below, or above the heating chamber 20. As a result, the heat insulating material 77 and the air heat insulating layer 78 are provided between the heating chamber 20 and the water tank 71 to improve the thermal efficiency at low cost and make it difficult for condensation in the heating chamber 20 to occur. Further, the air circulation layer 79 is provided on a side different from the air heat insulation layer 78 side of the water tank 71 (in this embodiment, the side away from the heating chamber 20, in other words, the side opposite to the air heat insulation layer 78 side of the water tank 71). By providing the water tank 71, the water tank 71 can be easily cooled.

  In addition, you may provide the air circulation layer 79 so that air may flow into the holding part (not shown) for holding the water tank 71. FIG. In this way, since the grip portion is directly cooled by the air flowing through the air circulation layer 79, an increase in the temperature of the grip portion can be suppressed as compared with the case where the grip portion is not directly cooled. Therefore, it is possible to further prevent discomfort caused by gripping the heated water tank 71 when the water tank 71 is attached or detached.

  When the water tank 71 is disposed above the heating chamber 20 in the heating cooker 1 that supplies steam from the upper portion into the heating chamber 20 as in this embodiment, the steam supply path (in FIG. 40 and the circulating duct 35) may be provided with a heat insulating material 77 and an air heat insulating layer 78.

  In addition, the convection oven type cooking device sucks the heating medium (steam or hot air) in the heating chamber from the back surface of the heating chamber, and ejects the heating medium from the same back surface to the heating chamber to circulate the heating medium in the heating chamber. In such a heating cooker, when the water tank 71 is disposed above the heating chamber, a heat insulating material may be provided in contact with the upper outer surface of the heating chamber, and an air heat insulating layer may be further provided.

  The above embodiment is merely an example, and should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above embodiments but by the scope of claims, and includes all modifications and variations within the meaning and scope equivalent to the scope of claims.

  INDUSTRIAL APPLICATION This invention can be utilized for the heating cooker which cooks to-be-heated material using steam.

The front view which shows the heating cooker of embodiment of this invention The side view which shows the heating cooker of embodiment of this invention The front view which shows the state which opened the door of the heating cooker of embodiment of this invention The front view which shows the outline of the state which removed the front panel of the heating cooker of embodiment of this invention The perspective view which shows the storage case of the water tank of the heating cooker of embodiment of this invention The perspective view which shows the state which removed the outer wall of the cabinet of the heating cooker of embodiment of this invention. The figure which shows the internal structure of the heating cooker of 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 43 Outer side port 47 Outer cover 48 Damper DESCRIPTION OF SYMBOLS 50 Steam generator 51 Pot 52 Steam generating heater 54 Drain valve 55 Water supply path 56 Tank water level detection part 57 Water supply pump 61 Spout cover 65, 67 Blowing port 70 Storage case 71 Water tank 76, 77 Heat insulation material 78 Air heat insulation layer 79 Air circulation Layer 80 Cooling fan 81 Pot water level detection part 82 Circuit board 87 Shield member 91 Tank water level detection container F Object to be heated

Claims (3)

  A heating chamber in which an object to be heated is installed, a detachable water tank, and a steam generator that generates steam by supplying water from the water tank, and the object to be heated is generated using the steam generated in the steam generator In a heating cooker that cooks, a heat insulating material provided between the heating chamber and the water tank, and an air heat insulating layer provided between the heat insulating material and the water tank and retaining air by retaining air A heating cooker comprising an air circulation layer that is provided on a side different from the air heat insulation layer side of the water tank and through which air can circulate. The heating cooker as claimed in claim 1, wherein with ejecting steam from the ceiling surface of the heating chamber, so as to face the lower portion of the side wall of the heating chamber, characterized in that a said water tank. The heating cooker according to claim 1 or 2 , wherein a high frequency generator for supplying high frequency to the heating chamber to perform high frequency heating is disposed on the same side as the water tank with respect to the heating chamber.

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