JP2010276300A - Steam cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently heat a heated object by non-superheated steam. <P>SOLUTION: A circulation unit 4 is attached to a heating chamber 3 so that an annular member 23 surrounds a suction port 18 of the heating chamber 3, and a steam introduction chamber 26 having the suction port 18 and a steam suction port 5 facing each other is formed in the annular member 23. A steam introduction pipe 24 provided with a nozzle 25 setting a blowing direction of steam to a heating chamber 3 side is laid in the steam introduction chamber 26. In such manner, by providing directivity to a blowing direction of saturated steam to be supplied to the steam introduction pipe 24 toward a heat chamber 3 side, in a "steam heating" mode, the saturated steam supplied to the steam introduction pipe 24 can be blown toward a directly heated object 17 by steam pressure. Furthermore, saturated steam sent into a body of the circulation unit 4 and discharged without contributing to the steaming or heating of the heated object 17 can be eliminated. Accordingly, the heated object 17 can be efficiently steamed or heated. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a steam cooker that performs cooking with at least non-superheated steam.

  As a steam cooker that performs cooking with superheated steam, there is one disclosed in Japanese Patent Application Laid-Open No. 2009-41813 (Patent Document 1). In this steam cooker, saturated steam generated by a steam generator installed outside the heating chamber is sucked into the suction side of the blower fan in the fan casing that is negative pressure due to the rotation of the blower fan, Join the circulating airflow through the external circuit. And the vapor | steam which came out of the said fan casing flows in into the superheated steam production | generation room | chamber installed on the said heating chamber, is heated with a steam heater, and becomes superheated steam. Part of this superheated steam is ejected from the plurality of ceiling steam outlets provided in the ceiling panel of the lower heating chamber toward the heating chamber. Further, the other part of the superheated steam is ejected toward the oblique side of the heating chamber from a ceiling steam outlet provided in the peripheral part of the ceiling panel facing obliquely outward. Thus, the superheated steam after heating the object to be heated is sucked into the fan casing from the suction port of the heating chamber and passes through the external circulation path formed by the fan casing and the superheated steam generation chamber. The circulation of returning to the heating chamber again is repeated.

  By the way, in addition to the “oven cooking” using superheated steam as described above, the present inventors can perform “steaming warming” that steams or warms an object to be heated with non-superheated steam. Various studies are underway.

  Although it is not a prior art, the structure as shown in FIG. 6 is considered as a steam cooker which can perform "oven cooking" and "steaming warming" as described above. In FIG. 6, the water in the tank 1 is supplied to the steam generator 2 and heated, and the generated saturated water vapor passes through the steam supply passage (not shown) to the side of the steam generator 2 in the heating chamber 3 (hereinafter, “ It is supplied to the heating chamber 3 side of the steam inlet 5 in the circulation unit 4 attached to the wall surface of the one side) from the outside.

  FIG. 7 is a front view of the circulation unit 4 as viewed from the heating chamber 3 side. In the vicinity of the circulation unit 4, a steam supply pipe 6 connected to the steam supply passage is disposed so as to be parallel to the wall surface on the one side of the heating chamber 3. An outlet 7 is attached in the vicinity of the vapor inlet 5 in the circulation unit 4. Further, a circulation fan 8 is installed in the circulation unit 4 so as to face the vapor suction port 5, and is rotated by a fan motor 9.

  On the heating chamber 3, a superheated steam generator 11 including a superheated steam generator heater 10 is placed. One side portion of the superheated steam generator 11 communicates with a steam supply port 12 provided at the upper portion of the circulation unit 4, and the other side portion is opposite to the steam generator 2 side in the heating chamber 3 (hereinafter referred to as “the steam generator 2”). The heating chamber 3 via the superheated steam supply passage 13 disposed along the wall surface of the heating chamber 3 and the first superheated steam outlet 14 provided on the other wall surface of the heating chamber 3. Communicating with Further, a number of second superheated steam outlets 15 are provided on the top surface of the heating chamber 3, and the superheated steam generator 11 communicates with the inside of the heating chamber 3 via the second superheated steam outlet 15. Yes.

  That is, a steam circulation path is formed by the circulation unit 4, the superheated steam generator 11, the heating chamber 3, and the connecting member that connects them. Then, saturated steam generated by the steam generator 2 is supplied to the boundary portion of the circulation unit 4 in the steam circulation path with the heating chamber 3.

  In the above configuration, in the “oven cooking mode” in which cooking is performed with superheated steam, the superheated steam generating heater 10 is turned on and the circulation fan 8 is driven to rotate. Then, the saturated water vapor supplied to the upstream side in the vicinity of the steam suction port 5 in the circulation unit 4 is sucked from the steam suction port 5 into the circulation unit 4 which is at a negative pressure due to the rotation of the circulation fan 8, and is supplied to the steam supply port. 12 is blown into the superheated steam generator 11. And it is heated by the superheated steam production | generation heater 10 and becomes superheated steam. A part of this superheated steam is jetted downward into the heating chamber 3 from a plurality of second superheated steam outlets 15 provided on the top surface of the lower heating chamber 3. Further, another part of the superheated steam is jetted into the heating chamber 3 from the first superheated steam outlet 14 of the heating chamber 3 through the superheated steam supply passage 13.

  And the superheated steam after heating the to-be-heated object 17 mounted on the tray 16 in the center in the heating chamber 3 is opposed to the steam inlet 5 of the circulation unit 4 on the one side wall surface in the heating chamber 3. Then, the air is sucked into the circulation unit 4 from the suction port 18 formed in this manner, and the circulation of returning to the heating chamber 3 again through the steam circulation path is repeated.

  In contrast, in the “steaming warming mode” in which the object to be heated 17 is steamed or warmed by non-superheated steam, the superheated steam generating heater 10 is turned off and the circulation fan 8 is stopped. Then, since the circulation fan 8 is stopped, no circulation airflow is generated in the steam circulation path, and the saturated water vapor supplied to the upstream side in the vicinity of the steam suction port 5 in the circulation unit 4 is in the circulation unit 4. It is not forcibly sucked into. Thus, the heated object 17 is steamed or warmed by the saturated water vapor that naturally flows into the heating chamber 3 due to the vapor pressure.

  However, the conventional steam cooker capable of performing “oven cooking” and “steaming and warming” has the following problems.

  That is, in the “steaming warming mode”, the saturated steam supplied to the steam circulation path circulates in the steam circulation path, so that dew condensation occurs and the saturated steam supplied to the object to be heated 17 decreases. In order to prevent this, the circulation fan 8 is stopped. In particular, when the first superheated steam outlet 14 is also provided on the lower side of the tray 16, since the saturated water vapor diffuses throughout the heating chamber 3, it takes time for steaming and warming. Is desired to be stopped. And there is no clear directivity in the blowing direction of the saturated steam supplied to the upstream side of the circulation unit 4 in the vicinity of the steam inlet 5. For this reason, the saturated water vapor supplied to the circulation unit 4 drifts in the vicinity of the suction port 18 in the heating chamber 3.

  Therefore, as shown by the white arrow in FIG. 6, the saturated water vapor supplied from the steam outlet 7 and drifting to the suction port 18 side of the heating chamber 3 is further pushed out by the saturated steam supplied from the steam outlet 7. Then, it flows into the heating chamber 3 from the suction port 18. On the other hand, the saturated water vapor that is supplied from the steam outlet 7 and drifts to the steam inlet 5 side of the circulation unit 4 is further pushed out by the saturated water vapor that is supplied from the steam outlet 7 to the inside of the circulation unit 4 from the steam inlet 5. Go into the.

  In this case, the saturated water vapor flowing into the circulation unit 4 does not contribute to the steaming or warming of the article 17 to be heated, and is condensed when drifting in the steam circulation path and discharged as condensed water. become. Further, the saturated water vapor that flows into the heating chamber 3 and is supplied to the object to be heated 17 has no clear directivity, and is not sprayed toward the object to be heated 17.

  From the above, the conventional steam cooker capable of performing “oven cooking” and “steaming warming” has a problem that the object to be heated 17 cannot be efficiently steamed or warmed.

  The problem that the saturated steam supplied directly into the heating chamber as described above has no clear directivity and cannot efficiently steam or warm the object to be heated is the steam provided adjacent to the heating chamber. This also occurs in the case of a steam cooker that directly supplies saturated steam generated by the generator to the heating chamber.

JP 2009-41813 A

  Then, the subject of this invention is providing the steam cooker which can heat a to-be-heated material efficiently with at least non-superheated steam among superheated steam and non-superheated steam.

In order to solve the above problems, the steam cooker of the present invention is:
A steam generator for generating steam;
A heating chamber for cooking the object to be heated;
A superheated steam generator for heating the saturated steam to generate superheated steam, and supplying the generated superheated steam to the heating chamber;
A circulation fan is built in, and the internal space on the heating chamber side with respect to the circulation fan communicates with a suction port provided on a side wall of the heating chamber, while on the side opposite to the heating chamber side with respect to the circulation fan A circulation unit that communicates with the superheated steam generator and forms a superheated steam circulation path together with the heating chamber and the superheated steam generator;
A nozzle that is installed closer to the heating chamber than the circulation fan in the circulation unit and blows out the saturated water vapor supplied from the steam generator with directivity toward the heating chamber. It is a feature.

  According to the above configuration, in the case of “steaming warming” in which the object to be heated is steamed or warmed by non-superheated steam, the superheated steam generating heater provided in the superheated steam generating device to generate superheated steam is turned off and circulated. The circulation fan built in the unit is stopped. Then, the saturated water vapor generated by the steam generator is supplied to a nozzle installed closer to the heating chamber than the circulation fan in the circulation unit, and blown out with directivity toward the heating chamber due to the vapor pressure. Thus, the saturated water vapor is blown out directly toward the object to be heated through the suction port provided on the side wall of the heating chamber.

  Therefore, the saturated steam from the steam generator can be blown directly toward the object to be heated, and it can flow into the main body of the circulation unit to condense without contributing to steaming or warming the object to be heated. Saturated water vapor discharged can be eliminated. As a result, the object to be heated can be efficiently heated by the non-superheated steam.

  On the other hand, in the case of “oven cooking” using superheated steam, the superheated steam generating heater and the circulation fan are turned on. If it does so, it will supply to the nozzle installed in the heating chamber side rather than the circulation fan in a circulation unit, and it will blow off with the directivity to the said heating chamber side by vapor pressure. In this case, since the circulation fan is driven to rotate, a circulating airflow is generated in the superheated steam circulation path, and the saturated steam blown toward the heating chamber side has a negative pressure. It is forcibly sucked into the circulation unit and joins the circulation airflow. Thus, the superheated steam generated by the superheated steam generating device is jetted into the heating chamber, and the object to be heated is cooked by the superheated steam.

  Therefore, in the case of the “steaming warming”, the first steam path that can efficiently blow out saturated steam directly toward the object to be heated, and in the case of the “oven cooking”, the superheated steam directly toward the object to be heated. It is possible to configure the second steam path (superheated steam circulation path) that can blow out the steam without waste.

In the steam cooker of one embodiment,
In the heating chamber, trays carrying objects to be heated can be installed in at least two stages,
The blowing direction of saturated water vapor in the nozzle is obliquely downward in the heating chamber direction.

  According to this embodiment, the direction in which the saturated water vapor is blown out from the nozzle is obliquely downward in the heating chamber direction. Therefore, even if the trays on which the objects to be heated are mounted are installed in a plurality of stages in the vertical direction, saturated water vapor can be applied to all the objects to be heated. Therefore, all the objects to be heated can be heated without spots.

In the steam cooker of one embodiment,
In the heating chamber, trays carrying objects to be heated can be installed in at least two stages,
The blowing direction of saturated water vapor in the nozzle is horizontal in the heating chamber direction and obliquely downward in the heating chamber direction.

  According to this embodiment, the blowing direction of the saturated water vapor in the nozzle is horizontal in the heating chamber direction and obliquely downward in the heating chamber direction. Therefore, even if the trays on which the objects to be heated are mounted are installed in a plurality of stages in the vertical direction, it is possible to spray saturated water vapor on all the objects to be heated without any spots. Therefore, it is possible to shorten the heating time of all the objects to be heated.

In the steam cooker of one embodiment,
One end is connected to the steam generator, the other end is closed, and the heating unit is disposed closer to the heating chamber than the circulation fan in the circulation unit. A steam introduction pipe to which the nozzle described in one is attached is provided.

  According to this embodiment, the nozzle is attached to a steam inlet pipe disposed in the circulation unit and having one end communicating with the steam generator. Therefore, by preparing a plurality of the steam introduction pipes in which the nozzle blowing direction and the number of the nozzles are changed according to the purpose of the cooking, it is possible to simply change the steam introduction pipes and to easily meet the cooking purpose. The blowing direction of saturated water vapor can be changed.

Moreover, the steam cooker of this invention is
A heating chamber for cooking the object to be heated;
A steam generator installed outside the heating chamber and generating steam;
The nozzle is installed on the wall surface of the heating chamber, and has a nozzle that blows out the saturated water vapor supplied from the steam generating device toward the heating chamber with directivity.

  According to the above configuration, the saturated water vapor generated in the steam generator is blown out from the nozzle installed on the wall surface of the heating chamber with directivity to the heating chamber side by the vapor pressure. Therefore, the saturated steam from the steam generator can be sprayed directly toward the object to be heated, and the object to be heated can be efficiently heated by the non-superheated steam.

  As is clear from the above, the steam cooker according to the present invention generates the steam generator by turning off the superheated steam generating heater of the superheated steam generating device and stopping the circulation fan in the circulating unit during “steaming and warming”. Since the saturated steam is supplied to the nozzle installed on the heating chamber side of the circulation fan in the circulation unit and blown out with directivity on the heating chamber side by the vapor pressure, the saturated steam from the steam generator is It can be blown out directly toward the object to be heated through a suction port provided in the side wall of the heating chamber. Furthermore, it is possible to eliminate the saturated water vapor that is condensed and discharged without contributing to the steaming or warming of the object to be heated by flowing into the main body of the circulation unit. Therefore, the object to be heated can be efficiently heated by the non-superheated steam.

  On the other hand, at the time of “oven cooking”, the superheated steam generation heater and the circulation fan are turned on, and the saturated steam blown out directly toward the object to be heated by the steam pressure from the nozzle in the circulation unit is used as the superheated steam circulation path. Since it joins with the circulating airflow currently generated in the inside, the to-be-heated object in a heating chamber can be cooked with the superheated steam produced | generated by the said superheated steam production | generation apparatus. Therefore, in the case of the “steaming warming”, the first steam path that can efficiently blow out saturated steam directly toward the object to be heated, and in the case of the “oven cooking”, the superheated steam directly toward the object to be heated. It is possible to configure the second steam path (superheated steam circulation path) that can blow out the steam without waste.

  Further, the steam cooker of the present invention blows out the saturated steam generated by the steam generator from the nozzle installed on the wall surface of the heating chamber with the directivity toward the heating chamber side by the steam pressure. Saturated water vapor from the steam generator can be blown directly toward the object to be heated. Therefore, the object to be heated can be efficiently heated by the non-superheated steam.

It is the longitudinal cross-sectional view seen from the front side in the steam cooker of this invention. It is the front view which looked at the circulation unit in FIG. 1 from the heating chamber side. It is a figure which shows the temperature change at the time of warming a can coffee in the case where the direction of all the nozzles in FIG. It is a figure which shows the various shapes of the nozzle in FIG. It is the longitudinal cross-sectional view seen from the front side in the heating cooker different from FIG. It is the longitudinal cross-sectional view seen from the front side in the conventional steam cooker. It is the front view which looked at the circulation unit in FIG. 6 from the heating chamber side.

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

-1st Embodiment FIG. 1: is the longitudinal cross-sectional view seen from the front side with the door (not shown) in the steam cooker of this Embodiment. The basic structure of the steam cooker is the same as that of the steam cooker shown in FIG. Therefore, the same members as those in the steam cooker shown in FIG.

  FIG. 2 is a front view of the circulation unit 4, which is a feature of the present application, as viewed from the heating chamber 3 side. As shown in FIGS. 1 and 2, the circulation unit 4 has a main body 21 that forms a flat box-like body having a shape in which a longitudinal section is overlapped with a rectangular long side and a semicircular side. A vapor suction port 5 is formed in the flat plate 22a facing the one side wall surface of the heating chamber 3 in the main body 21, and the shape similar to the shape of the flat plate 22a is formed so as to surround the vapor suction port 5. Side surfaces of the strip-shaped thin plate are annularly attached to form an annular member 23.

  Further, a drive shaft (not shown) of the circulation fan 8 is inserted through a flat plate 22b facing the flat plate 22a in the main body 21, and a fan motor 9 for driving the drive shaft of the circulation fan 8 is attached to the surface of the flat plate 22b. ing.

  In addition, a steam outlet 7 of the steam supply pipe 6 is formed on one of two surfaces of the annular member 23 facing each other. A cylindrical steam introduction pipe 24 is detachably mounted between the two surfaces facing each other, and one end of the steam introduction pipe 24 communicates with the steam jet 7 while the other end is closed. ing.

  Further, a plurality of holes are formed linearly along the central axis on the side of the heating chamber 3 in the steam introduction pipe 24, and a nozzle 25 that sets the direction of steam discharge to the side of the heating chamber 3 in each hole. Is inserted and attached. In other words, in the present embodiment, directivity is provided such that the saturated steam supplied to the vicinity of the steam inlet 5 in the circulation unit 4 toward the heating chamber 3 is directed toward the heating chamber 3.

  As shown in FIG. 1, the circulation unit 4 has the side surface of the annular member 23 closely attached to the one side wall surface of the heating chamber 3 so that the annular member 23 surrounds the suction port 18 of the heating chamber 3. It is attached to the wall surface on the one side of the heating chamber 3. At that time, the internal space of the annular member 23 is closed by the wall surface on the one side of the heating chamber 3, and the steam introduction chamber 26 having the suction port 18 and the steam suction port 5 facing each other is formed.

  A magnetron (not shown) is disposed at the lower part of the heating chamber 3, and the microwave generated by the magnetron is guided to the lower center of the heating chamber 3 by a waveguide (not shown). The object to be heated 17 is heated by being radiated upward in the heating chamber 3 while being rotated by a rotating antenna 28 driven by 27.

  In the above configuration, in the “steaming warming mode”, the superheated steam generating heater 10 is turned off and the circulation fan 8 is stopped. Then, the saturated steam generated in the steam generator 2 is introduced into the steam introduction chamber 26 by the steam pressure via the steam supply pipe 6 connected to the steam supply passage (not shown). Supplyed to the tube 24. Since the circulation fan 8 is stopped and no circulation airflow is generated in the steam circulation path, the saturated steam supplied to the steam introduction pipe 24 is forcibly sucked into the main body 21 of the circulation unit 4. Instead, the steam is blown out by the steam pressure from the nozzle 25 of the steam introduction pipe 24 toward the heating chamber 3 set by the nozzle 25.

  That is, in the present embodiment, the saturated water vapor from the steam generator 2 can be directly blown toward the object to be heated 17 without going through the steam circulation path. Furthermore, since all the saturated water vapor from the steam generator 2 can be blown out toward the heating chamber 3 side, it flows into the main body 21 of the circulation unit 4 and contributes to steaming or warming the object to be heated 17. It is possible to eliminate the saturated water vapor that is discharged without the use. Therefore, the object to be heated 17 can be efficiently steamed or warmed.

  Here, on the wall surface on the one side and the wall surface on the other side in the heating chamber 3, locking portions 29 for locking both end portions of the tray 16 are provided in three stages in the vertical direction. The steam introduction pipe 24 is arranged so as to be located slightly above the upper locking portion 29a. Therefore, in the case of the “steaming warming mode”, when the orientations of all the nozzles 25 of the steam introduction pipe 24 are set to be horizontal, the saturated steam blown from the nozzles 25 is leveled toward the heating chamber 3 side. When the tray 16 on which the object to be heated 17 is mounted is locked by the upper locking portion 29a, the saturated water vapor blown from the nozzle 25 is sufficiently blown against the object to be heated 17. It is done. However, when the tray 16 on which the object to be heated 17 is mounted is locked by the middle locking portion 29b or the lower locking portion 29c, the tray 17 is not blown against the heated material 17. Therefore, when the two trays 16 on which the object to be heated 17 is mounted are locked by the upper locking portion 29a and the middle locking portion 29b, the heated object 17 of the upper tray 16 and the middle tray 16 are moved. Steamed spots or warm spots are generated on the object to be heated 17.

  Therefore, when the two trays 16 on which the object to be heated 17 is mounted are arranged in the upper stage and the middle stage, all the nozzles 25 are connected to the heating chamber 3 through the steam introduction pipes 24 installed in the steam introduction chamber 26. The steam inlet pipe 24 is inclined downward in the direction (hereinafter simply referred to as “obliquely downward”). By doing so, the saturated water vapor drawn from the obliquely downward nozzle 25 can be applied to the object to be heated 17 regardless of the position of the tray 16 on which the object to be heated 17 is mounted. Therefore, it is possible to prevent steaming spots or warming spots from occurring in the upper and middle two stages of the object to be heated 17 without manipulating the blowing directions from the individual nozzles 25.

  FIG. 3 shows a case where all the nozzles 25 in the steam introduction pipe 24 are oriented obliquely downward (−15 degrees) and horizontally in the heating chamber 3 direction (hereinafter simply referred to as “horizontal orientation”). The change in temperature when the can coffee is warmed with saturated steam in the case where the water vapor is heated is shown. For comparison, the temperature change when using a conventional steam cooker without the steam introduction pipe 24 shown in FIG. 6 is also shown.

  In FIG. 3, the use of the steam cooker having the steam introduction pipe 24 raises the temperature by 10 degrees or more after 4 minutes from the start of warming, compared to the conventional steam cooker without the steam introduction pipe 24. be able to. Furthermore, even when this steam cooker is used, it can be seen that the direction of the nozzle 25 is obliquely downward (−15 degrees) and the temperature is higher than the horizontal direction. When the tray 16 on which canned coffee is placed is positioned in the upper stage, the nozzle 25 has substantially the same temperature regardless of whether the nozzle 25 is oriented obliquely downward or horizontally. However, when the tray 16 is located in the middle, obviously, the temperature of the can coffee can be increased by 10 degrees at the maximum when the nozzle 25 is obliquely downward (-15 degrees) than in the horizontal direction.

  From the above, when the direction of all the nozzles 25 in the steam introduction pipe 24 is set to be obliquely downward, the object to be heated 17 can be warmed without the upper and middle spots as compared with the horizontal direction. I understand.

  By the way, the nozzle 25 in the steam introduction pipe 24 is formed in a chip shape, and is attached to the hole bored in the steam introduction pipe 24 from the inside. FIG. 4 shows various shapes of the nozzle 25.

  In FIG. 4, FIG. 4 (a) shows a nozzle 25a having a rectangular cross section of the steam outlet. According to this, since saturated steam can be blown out widely without expanding the area of the steam outlet, the saturated steam can be efficiently applied to the object to be heated 17. FIG. 4B shows a nozzle 25b in which the cross-sectional shape of the vapor jet outlet is an ellipse. According to this, similarly to the case of FIG. 4 (a), it is possible to blow out a wide range of saturated steam without increasing the area of the steam outlet, and it can be efficiently applied to the object 17 to be heated. FIG. 4 (c) shows a nozzle 25c in which the shape of the steam outlet is a convex spherical surface. According to this, since the steam outlet is formed at the top of the convex spherical surface, the blowing direction of the saturated steam is stable. FIG. 4 (d) shows a nozzle 25d having a vapor jet port with a diverging shape. According to this, the blowing angle of the saturated steam is widened, and the saturated steam can be blown out in a wider range. FIG. 4 (e) shows a nozzle 25e whose steam outlet has an obliquely downward shape. According to this, as described above, the saturated water vapor can be applied to the object to be heated 17 regardless of the installation height of the tray 16. FIG. 4 (f) shows a nozzle 25f having a circular cross-section of the steam outlet. According to this, saturated water vapor can be blown locally far away.

  Further, the nozzles 25 in the steam introduction pipe 24 do not have to be equipped with the nozzles 25 having the same shape, and can be freely combined depending on how the object 17 is placed.

  As shown in FIG. 3, by setting the direction of all the nozzles 25 in the steam introduction pipe 24 to the diagonally downward direction, the object to be heated 17 can be warmed without unevenness above and beyond the horizontal direction. . However, until about 3 minutes after the start of warming, the canned coffee that is located in the middle stage and directly hits with the saturated water vapor has a higher temperature than the canned coffee that is wrapped in the saturated water vapor that rises in the upper stage.

  Therefore, for example, the direction of the two central nozzles 25 in the steam introduction pipe 24 is the horizontal direction (nozzles 25a and 25b in FIGS. 4A and 4B), and the directions of the two nozzles 25 at both ends are the above. By being inclined downward (nozzle 25e in FIG. 4 (e)), the horizontal nozzle 25 is applied to the upper heated object 17, and the diagonally downward nozzle 25 is applied to the intermediate heated object 17. The saturated water vapor can be sprayed directly. Therefore, compared with the case where all the nozzles 25 are directed obliquely downward, the warming time for the upper and middle heated objects 17 can be shortened.

  In addition, when steaming or warming is performed by arranging a plurality of trays 16 in which a plurality of small objects to be heated 17 are arranged in multiple stages, a part of the plurality of nozzles 25 provided in the steam introduction pipe 24 is placed in the horizontal direction. The nozzle 25 is oriented, and the remaining nozzle 25 is the obliquely downward nozzle 25. By doing so, the heated object 17 arranged in the vicinity of the steam introduction pipe 24 in the upper tray 16 can be locally heated by the saturated steam blown from the horizontal nozzle 25. Further, the saturated steam blown out from the obliquely downward nozzle 25 distributes the saturated steam to the back of the upper tray 16 and the corners of the middle tray 16 to uniformly heat the remaining object 17 to be heated. Can do.

  The steam cooker has been described above by taking the case of the “steaming / warming mode” as an example. In the “oven cooking mode”, as in the case of the steam cooker shown in FIG. 6, the superheated steam generation heater 10 is turned on and the circulation fan 8 is driven to rotate. In this case, as described in the case of the “steaming / warming mode”, the saturated steam generated by the steam generator 2 is blown out from the nozzle 25 of the steam introduction pipe 24 toward the heating chamber 3. However, in the “oven cooking mode”, since the circulation fan 8 is rotationally driven, a circulation airflow is generated in the steam circulation path, and the saturated steam blown out toward the heating chamber 3 side is Then, it is forcibly sucked into the circulation unit 4 which is in a negative pressure, and joins the circulation airflow. Therefore, it is possible to obtain a circulating flow of superheated steam in the steam circulation path, even though saturated steam is blown out toward the heating chamber 3 by the nozzle 25.

  In the “oven cooking mode” using superheated steam, initially, the circulation fan 8 is stopped, and the saturated steam generated by the steam generating device 2 is blown out from the nozzle 25 of the steam introducing pipe 24, thereby As in the case of the “warming and warming mode”, it can be uniformly applied to the object to be heated 17 placed on the tray 16 installed in any stage, and salt reduction and deoiling can be promoted. Thereafter, the circulation fan 8 is driven to perform oven cooking, so that it is possible for health-conscious people to provide foods with low salt and oil content.

  As described above, in the above-described embodiment, when the saturated steam generated in the steam generator 2 is supplied to the heating chamber via the steam introduction chamber 26 of the circulation unit 4, the steam blowing direction is set to the heating chamber side. The nozzle 25 is set to blow out toward the object to be heated 17 by the vapor pressure. In this way, by providing the directivity toward the heating chamber 3 in the blowing direction of the saturated steam to be supplied to the heating chamber 3, in the “steaming warming mode”, the saturated steam is directly heated by the vapor pressure. 17 can be blown out. Furthermore, it is possible to eliminate saturated water vapor that flows into the main body 21 of the circulation unit 4 and is discharged without contributing to the steaming or warming of the article 17 to be heated.

  Therefore, according to the present embodiment, the object to be heated 17 can be efficiently steamed or warmed by the non-heated steam.

-2nd Embodiment By the way, the problem that the saturated water vapor | steam which flows in into a heating chamber and is supplied to a to-be-heated object does not have clear directivity, and the said to-be-heated material cannot be efficiently steamed or heated is the The same occurs in the case of a steam cooker that directly supplies saturated steam generated by a steam generator provided adjacent to the side to the heating chamber. Hereinafter, the technical idea of “providing directivity toward the heating chamber in the blowing direction of the saturated steam” described above is applied to the steam cooker that directly supplies the saturated steam generated in the steam generator to the heating chamber. The case where it does is demonstrated.

  FIG. 5 is a longitudinal sectional view seen from the front side where a door (not shown) in the steam cooker according to the present embodiment is present.

  In FIG. 5, the steam generator 31 is attached to one wall surface in the heating chamber 32. Then, water in the tank 33 is supplied to the steam generator 31 by the pump 34 and heated to generate saturated water vapor. As shown in FIG. 4, the steam generator 31 and the heating chamber 32 have an inlet located in the steam generator 31 and an outlet located immediately above the upper tray locking portion 35 in the heating chamber 32. A nozzle 36 is attached. In this case, the method of attaching the nozzle 36 is not particularly limited, and the nozzle 36 may be attached directly through the wall surfaces of the steam generator 31 and the heating chamber 32, or the steam introduction pipe 24 shown in FIG. The same steam inlet pipe may be attached to the boundary between the steam generator 31 and the heating chamber 32.

  By doing so, as shown in FIG. 5, a clear directivity is generated in the saturated steam supplied by the steam pressure in the heating chamber 32, and the steam is blown toward the heated object 37.

  In each of the above embodiments, the steam introduction pipe 24 in FIG. 1 is disposed slightly above the upper locking portion 29a. Similarly, the nozzle 36 in FIG. 5 is disposed immediately above the upper tray locking portion 35. In this way, by setting the height of the saturated steam supply port into the heating chambers 3 and 32 at the same height as the grills of the uppermost trays 16 and 38 or higher than the grills, a plurality of heights can be obtained. The insides of the heating chambers 3 and 32 are partitioned into a plurality of heating spaces by the trays 16 and 38 installed in stages, and the heated objects 17 and 37 can be steamed or warmed in a short time by the partitioning effect in that case.

  In the above embodiment, the number of nozzles 25 in the steam introduction pipe 24 is described as four, but the present invention is not limited to four and may be set as appropriate. In that case, it is also possible to provide a plurality of steam introduction pipes 24 in which combinations of the number and types of nozzles 25 (see FIG. 4) are changed, and to replace the steam introduction pipes 24 according to the cooking category.

  Further, the steam introduction pipe 24 itself does not have directivity, but the saturated water vapor blown out from the steam introduction pipe 24 by a separate body provided on the inner wall of the heating chamber 3 in the vicinity of the outlet of the steam introduction pipe 24. Directivity may be imparted.

1,33 ... tank,
2 ... steam generator,
3, 32 ... heating chamber,
4 ... circulation unit,
5. Steam inlet,
6 ... steam supply pipe,
7… Vapor spout,
8 ... Circulating fan,
9 ... Fan motor,
10 ... Superheated steam generating heater,
11 ... Superheated steam generator,
12 ... steam supply port,
13 ... Superheated steam supply passage,
14 ... 1st superheated steam blower outlet,
15 ... second superheated steam outlet,
16,38 ... Tray,
17, 37 ... object to be heated,
18 ... Suction port,
21 ... the body,
23 ... an annular member,
24 ... steam introduction pipe,
25, 36 ... Nozzle,
26 ... steam introduction chamber,
27 ... motor,
28 ... Rotating antenna,
29 ... locking part,
31 ... steam generator,
34 ... pump,
35 ... Tray locking part.

Claims (5)

A steam generator for generating steam;
A heating chamber for cooking the object to be heated;
A superheated steam generator for heating the saturated steam to generate superheated steam, and supplying the generated superheated steam to the heating chamber;
A circulation fan is built in, and the internal space on the heating chamber side with respect to the circulation fan communicates with a suction port provided on a side wall of the heating chamber, while on the side opposite to the heating chamber side with respect to the circulation fan A circulation unit that communicates with the superheated steam generator and forms a superheated steam circulation path together with the heating chamber and the superheated steam generator;
A nozzle that is installed closer to the heating chamber than the circulation fan in the circulation unit and blows out the saturated water vapor supplied from the steam generator with directivity toward the heating chamber. Steam cooker featuring. The steam cooker according to claim 1, wherein
In the heating chamber, trays carrying objects to be heated can be installed in at least two stages,
The steam cooker according to claim 1, wherein a blowing direction of the saturated steam in the nozzle is obliquely downward in the heating chamber direction. The steam cooker according to claim 1, wherein
In the heating chamber, trays carrying objects to be heated can be installed in at least two stages,
The steam cooker according to claim 1, wherein the blowing direction of the saturated steam in the nozzle is horizontal in the heating chamber direction and obliquely downward in the heating chamber direction. The steam cooker according to any one of claims 1 to 3,
One end is connected to the steam generator, the other end is closed, and the heating unit is disposed closer to the heating chamber than the circulation fan in the circulation unit. A steam cooker provided with a steam introduction pipe to which the nozzle described in one is attached. A heating chamber for cooking the object to be heated;
A steam generator installed outside the heating chamber and generating steam;
A steam cooker, comprising: a nozzle that is installed on a wall surface of the heating chamber and blows out the saturated water vapor supplied from the steam generator with directivity toward the heating chamber.

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