JP5090561B1 - Cooker - Google Patents

Abstract

An object of the present invention is to efficiently perform heat exchange in a heating duct for heating steam supplied to a cooking chamber.
A partition plate 37 having a recess in the middle in the direction of steam flow is disposed in a first duct section 20 to partition it into two upper and lower stages, and a superheated steam generating heater 23 is installed in a lower circulation section 38. At the same time, superheated steam generated by supplying saturated steam is supplied to the bent portion 21. In that case, the narrow portion 40 of the circulation portion 38 formed by the concave portion of the partition plate 37 is narrow, and the flow rate of the supplied steam is increased. As a result, the heat exchange efficiency between the saturated steam and the superheated steam generation heater 23 is increased. Furthermore, an air heat insulation layer is formed on the upper stage of the circulation part 38, and the volume of the narrow part 40 is reduced to eliminate heat radiation due to the staying steam, thereby increasing the internal temperature by making the narrow part 40 thermally insulated. As a result, the temperature of the top plate 27 of the cooking chamber 13 becomes high and the radiant heat increases, so that the heating efficiency of the object to be heated can be increased and the cooking time can be shortened.
[Selection] Figure 6

Description

  The present invention relates to a cooking device that heats an object to be heated by supplying a heating medium heated in a room provided along the top surface of the cooking chamber to the cooking chamber.

  Conventionally, as a cooking device, there is a cooking device disclosed in Japanese Patent Laid-Open No. 2009-281737 (Patent Document 1).

  In the conventional heating cooker, the heater room provided at the upper part of the cooking chamber is heated by supplying air from a blower (fan) provided behind the heater chamber, and the resulting hot air is cooked. It supplies to a cooking chamber from many holes provided in the perforated plate in the ceiling of the chamber. Thus, the cooked food in the cooking chamber is heated by the hot air supplied to the cooking chamber and the microwave from the magnetron.

  However, the conventional cooking device has the following problems.

  That is, in the case of the conventional cooking device, the heater chamber is formed in a rectangular parallelepiped box shape having a substantially uniform height and width as a whole, and a plurality of U-shaped heaters are provided inside. Are arranged at substantially equal intervals. The heater chamber is covered with a heat insulating material and held by a shielding cover.

  Therefore, the space around the heater is wide, and the heat released from the heater cannot be efficiently exchanged with the wind blown into the heater chamber from the rear fan, and much heat is passed through the shielding cover. The heat insulation is deprived of the heat insulation. Therefore, there is a problem that the cooking time cannot be shortened.

  Furthermore, when the height of the heater chamber is lowered in order to increase the heat exchange efficiency in the heater chamber, there is a problem that pressure loss at the corner portion in the circulation path increases and efficient hot air circulation cannot be performed.

JP 2009-281737 A

  Accordingly, an object of the present invention is to efficiently perform heat exchange in the heat medium heating chamber for heating the heat medium supplied to the cooking chamber with a heater in a short time and to efficiently circulate the heat medium. It is in providing the cooking device which can perform.

In order to solve the above problems, the heating cooker of the present invention is:
A cooking chamber for cooking the object to be heated;
A ceiling heat medium which is located on the top surface of the cooking chamber and has a heater for heating the heat medium, and which ejects the heat medium from the plurality of jet nozzles provided on the top surface toward the cooking chamber. A heating chamber;
A circulation duct for circulating a heat medium between the heating cooking chamber and the ceiling heat medium heating chamber;
A fan for circulating the heat medium,
An air heat insulation layer forming member for forming an air heat insulation layer is provided on the top of the ceiling heat medium heating chamber,
The heater is disposed between the air heat insulating layer forming member and the top surface of the cooking chamber,
The air heat insulating layer forming member is provided so as to bulge toward the heating cooking chamber from a position on the top surface of the ceiling heating medium heating chamber from the inner side of both ends in the flow direction of the heating medium. It is characterized by.

  According to the above configuration, since the air heat insulating layer is formed by the air heat insulating layer forming member on the top of the ceiling heat medium heating chamber located on the top surface of the cooking chamber, the heat in the ceiling heat medium heating chamber is exposed to the outside. Escape can be prevented and the internal temperature can be increased. Moreover, the temperature rise of the top surface of the heating cooker can be reduced. Therefore, heat exchange between the heat medium and the heater in the ceiling heat medium heating chamber can be efficiently performed in a short time. Further, efficient circulation of the heat medium can be performed without increasing the pressure loss at the corner of the circulation duct.

  Furthermore, the amount of heat insulating material used can be reduced.

Moreover, in the heating cooker of one embodiment,
The air heat insulating layer forming member is made of metal, and at least the inner surface is a mirror surface.

  According to the above configuration, since the inner surface of the air heat insulation layer forming member is a mirror surface, the inner surface of the air heat insulation layer forming member can reflect heat. Therefore, it is possible to prevent heat between the air heat insulating layer forming member and the top surface of the cooking chamber from escaping to the outside, and the internal temperature of the ceiling heat medium heating chamber can be further increased.

Moreover, in the heating cooker of one embodiment,
A portion of the air heat insulating layer forming member facing the inlet side of the ceiling heat medium heating chamber is inclined so as to guide the heat medium obliquely downward.

  According to this embodiment, the inlet side of the ceiling heat medium heating chamber in the air heat insulation layer forming member is inclined so as to guide the heat medium obliquely downward. The heat medium can be ejected toward the entire cooking chamber.

Moreover, in the heating cooker of one embodiment,
The air insulation layer forming member includes a narrow portion forming portion that forms a narrow portion between the inlet and the outlet of the ceiling heat medium heating chamber, and a part of the heater is disposed in the narrow portion. Yes.

  According to this embodiment, the narrow portion is formed between the inlet and the outlet of the ceiling heat medium heating chamber. Therefore, it is possible to increase the flow rate of the heat medium in the narrow part and to quickly discharge the heat medium after heat exchange, and to increase the heat exchange efficiency between the heat medium and the heater in the narrow part.

Moreover, in the heating cooker of one embodiment,
In plan view, the occupied area of the heater portion located upstream from the middle between the inlet and the outlet of the ceiling heat medium heating chamber is other than the heater located downstream from the middle. It is larger than the occupied area of the part.

  According to this embodiment, since the occupied area of the heater portion located on the upstream side of the ceiling heat medium heating chamber is made larger than that on the downstream side, the heat medium to be ejected from the upstream outlet is selected. It can heat more effectively.

Moreover, in the heating cooker of one embodiment,
The heater portion is located in the vicinity of the jet outlet and upstream of the flow of the heat medium in the ceiling heat medium heating chamber.

  According to this embodiment, since the heater portion is positioned in the vicinity of the jet outlet and on the upstream side, the heat medium to be jetted from the jet outlet is effectively heated immediately before the jet. be able to.

Moreover, in the heating cooker of one embodiment,
The air heat insulation layer forming member has an enlarged portion forming portion that forms an enlarged portion having a passage area larger than the passage area of the narrow portion on the downstream side of the narrow portion,
The heater portion is located in the enlarged portion.

  According to this embodiment, since the enlarged portion is formed on the downstream side of the narrowed portion and the heater portion is positioned in the enlarged portion, pressure loss can be reduced, and the inside of the enlarged portion can be reduced. The temperature drop of the heat medium can be prevented.

Moreover, in the heating cooker of one embodiment,
At least one of the jet outlets is located in the enlarged portion.

  According to this embodiment, since the spout is located in the enlarged portion, the heat medium can be ejected downward in the enlarged portion in a state closer to the vertical from the spout.

Moreover, in the heating cooker of one embodiment,
The ceiling heat medium heating chamber is a superheated steam generation chamber that superheats steam to form superheated steam.

  According to this embodiment, in the case where the object to be heated is cooked with superheated steam, heat is efficiently exchanged between the heating medium in the ceiling heating medium heating chamber and the heater in a short time, and cooking time Can be shortened.

Moreover, in the heating cooker of one embodiment,
The heater is clamped by an elastic attachment member having elasticity, and is attached to the ceiling heat medium heating chamber by the elastic attachment member with a gap with respect to the upper surface and the lower surface of the ceiling heat medium heating chamber.

  According to this embodiment, since the heater clamped by the elastic mounting member is mounted in the ceiling heat medium heating chamber with a gap with respect to the upper surface and the lower surface, the ceiling heat medium heating chamber Even if the lower surface is thermally deformed, the heater can be fixed separately from the upper surface and the lower surface of the ceiling heat medium heating chamber. Therefore, the heat medium can be passed through the top and bottom of the heater, and the heat of the heater can be prevented from being taken away through the upper surface and the lower surface of the ceiling heat medium heating chamber, so that the heat exchange efficiency can be improved. .

Moreover, in the heating cooker of one embodiment,
One end of the elastic mounting member is attached to the ceiling heat medium heating chamber, while the other end of the elastic mounting member is a curved convex surface, and the curved convex surface is on the inner surface of the ceiling heat medium heating chamber. Non-fixed but in contact.

  According to this embodiment, since the curved convex surface provided at the other end of the elastic mounting member is in non-fixed contact with the inner surface of the ceiling heat medium heating chamber, it can cope with thermal expansion, and The ceiling heating medium heating chamber is not damaged.

  As is clear from the above, the heating cooker of the present invention has an air heat insulating layer formed on the top of the ceiling heat medium heating chamber located on the top surface of the heating cooking chamber with the air heat insulating layer forming member. The heat in the ceiling heat medium heating chamber can be prevented from escaping to the outside, and the internal temperature can be increased. Moreover, while being able to reduce the temperature rise of the top | upper surface of the said heating cooker, the usage-amount of a heat insulating material can be reduced.

  Therefore, according to the present invention, it is possible to efficiently perform heat exchange between the heating medium and the heater in the ceiling heating medium heating chamber in a short time, and to provide a safe and inexpensive heating cooker.

It is a front perspective view in the heating cooker of this invention. It is the longitudinal cross-sectional schematic diagram seen from the front side in the heating cooker shown in FIG. It is a top view of the heating cooking chamber in the state which removed the casing. It is AA 'arrow sectional drawing in FIG. It is a top view of the state which removed the steam duct in the heating cooking chamber shown in FIG. It is an enlarged view of the steam duct in FIG. FIG. 7 is an enlarged view of a heater fixing angle in FIG. 6.

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

  FIG. 1 is a front perspective view of the heating cooker according to the present embodiment. In this cooking device, a door 2 is attached to the front of a rectangular parallelepiped casing 1 so as to rotate about the lower end side. A handle 3 is attached to the upper part of the door 2, and a heat-resistant glass 4 is attached to the approximate center. An operation panel 5 is provided on the right side of the door 2 in the drawing. The operation panel 5 includes a color liquid crystal display unit 6 and a button group 7. Further, an exhaust duct 8 is provided on the upper right side of the casing 1 on the right rear side. Further, a dew receptacle 9 is detachably attached below the door 2 of the casing 1.

  FIG. 2 is a schematic diagram of a longitudinal section viewed from the door 2 side (front side) of the cooking device shown in FIG. As shown in FIG. 2, this heating cooker heats the water supplied from the water tank 11 with a steam generator 12 to generate saturated water vapor as a heat medium. The saturated steam generated by the steam generator 12 passes through a steam supply passage (not shown) and the cooking chamber 13 of the steam inlet 15 in the circulation unit 14 attached to the right side of the cooking chamber 13 in the drawing. And is ejected from a steam supply pipe 16 connected to the steam supply passage.

  The steam supply pipe 16 is attached in the vicinity of the steam inlet 15 of the circulation unit 14 so as to be parallel to the right side surface of the cooking chamber 13. A circulation fan 17 that is rotationally driven by a fan motor 18 is disposed in the circulation unit 14 so as to face the vapor suction port 15.

  A steam duct 19 bent in an L shape is provided so as to cover the top surface of the cooking chamber 13 and the left side surface in the figure. The steam duct 19 includes a first duct portion 20 fixed to the top surface of the cooking chamber 13, a bent portion 21 that bends downward from the left side of the first duct portion 20, and a left side surface of the cooking chamber 13. A second duct portion 22 that is fixed and is continuous with the first duct portion 20 via the bent portion 21 is included.

  A superheated steam generation heater 23 is accommodated in the first duct portion 20 of the steam duct 19. And the 1st duct part 20 and the superheated steam production | generation heater 23 comprise the superheated steam production | generation apparatus 24. FIG.

  The right side of the first duct portion 20 in the figure in the steam duct 19 communicates with four steam supply ports 26 provided at the upper part of the circulation unit 14 via four connection pipes 25. The top plate 27 of the cooking chamber 13 is provided with a plurality of first steam jets 28, and the first duct portion 20 of the steam duct 19 is placed in the cooking chamber 13 through the first steam jets 28. Communicate. On the other hand, the second duct portion 22 in the steam duct 19 communicates with the cooking chamber 13 through a plurality of second steam jets 29 provided on the left side surface of the cooking chamber 13.

  A gap between the cooking chamber 13 and the steam duct 19 is sealed with a heat resistant resin or the like. The cooking chamber 13 and the steam duct 19 are covered with a heat insulating material except for the front opening of the cooking chamber 13.

  In other words, in the present embodiment, the first duct portion 20 constitutes the ceiling heat medium heating chamber in the claims.

  The circulation path of the steam is formed by the circulation unit 14, the superheated steam generator 24, the cooking chamber 13, and the connecting member connecting them. And the saturated water vapor | steam produced | generated with the steam generator 12 is supplied to the boundary part with the heating cooking chamber 13 of the circulation unit 14 in this circulation path. Then, the supplied saturated water vapor is forcibly sucked from the vapor suction port 15 into the circulation unit 14 which is in a negative pressure due to the rotation of the circulation fan 17, and joins the circulation airflow circulating through the circulation path. become.

  In this way, the saturated steam sucked into the circulation unit 14 is jetted into the superheated steam generator 24 from the steam supply port 26. And it is heated by the superheated steam production | generation heater 23 and becomes superheated steam. A part of this superheated steam is jetted downward into the cooking chamber 13 from a plurality of first steam outlets 28 provided on the top plate 27 of the cooking chamber 13 on the lower side in the drawing. Further, another part of the superheated steam is jetted into the cooking chamber 13 from the second steam jetting port 29 of the cooking chamber 13 through the bent portion 21 and the second duct portion 22.

  And the upper side of the to-be-heated object 31 mounted on the tray 30 in the said cooking chamber 13 is mainly heated by the superheated steam from the 1st steam outlet 28, and the lower side of the to-be-heated object 31 is mainly 2nd. Heated by superheated steam from the steam outlet 29. The superheated steam after heating the article to be heated 31 is sucked into the circulation unit 14 from the suction port 32 formed on the right side of the cooking chamber 13 so as to face the steam suction port 15 of the circulation unit 14. The circulation of returning to the cooking chamber 13 again through the steam circulation path is repeated.

  Note that locking portions 33a, 33b, and 33c that lock both ends of the tray 30 are provided in three stages in the vertical direction on the right side and the left side in the cooking chamber 13.

  In addition, a magnetron (not shown) is disposed in the lower part of the cooking chamber 13. The microwave generated by the magnetron is guided to the lower center of the cooking chamber 13 by a waveguide (not shown), and is stirred upward by a rotating antenna 35 driven by a motor 34, and then upward in the cooking chamber 13. The object to be heated 31 is heated by being emitted. The superheated steam generation heater 23 and the magnetron constitute a heating unit.

  A cooling fan (not shown) and an electrical component 36 are disposed on the lower side of the casing 1. The electrical component 36 includes a drive circuit that drives each part of the heating cooker, a control circuit that controls the drive circuit, and the like.

  FIG. 3 is a plan view of the cooking chamber 13 with the casing 1 removed. In FIG. 3, a steam duct 19 is disposed from the top surface of the cooking chamber 13 to the left side surface. The first duct portion 20 of the steam duct 19 is located on the top surface of the cooking chamber 13, and the first duct portion 20 is connected to the upper portion of the circulation unit 14 on the side opposite to the bent portion 21. Four connecting pipes 25a to 25d for projecting are provided. Further, terminal portions 23 a and 23 b of the superheated steam generation heater 23 are provided so as to protrude from the side portions of the first duct portion 20 on the connection pipes 25 a to 25 d side. The number of connection pipes 25 is not limited to four.

  4 is a cross-sectional view taken along the line AA ′ in FIG. A substantially rectangular hole is provided on the top surface of the cooking chamber 13 and is covered with a top plate 27. Although not explicitly shown in FIG. 2, as shown in FIG. 4, approximately 3/4 of the first duct portion 20 on the bent portion 21 side is partitioned into two upper and lower stages by the partition plate 37 over the entire width. ing. The superheated steam generating heater 23 is disposed in a lower circulation part 38 in which the first duct part 20 is partitioned into two upper and lower stages by a partition plate 37. Here, the four connecting pipes 25 a to 25 d are communicated with the circulation part 38, and the bent part 21 of the steam duct 19 is also communicated with the circulation part 38. Therefore, the saturated steam ejected from the circulation unit 14 is supplied into the circulation part 38, and the superheated steam generated in the circulation part 38 is supplied to the second duct part 22 via the bent part 21. become.

  FIG. 5 is a plan view of the heating cooker shown in FIG. 3 with the steam duct 19 removed. Here, since the superheated steam generation heater 23 is attached and fixed to the steam duct 19, when the steam duct 19 is removed, the superheated steam generation heater 23 is also removed. However, for convenience of explanation, the superheated steam generation heater 23 is also removed. 23 is also described. The top plate 27 of the cooking chamber 13 is provided with a plurality of first steam jets 28, and the superheated steam generation heater 23 is arranged so as to be substantially along the upstream side in the vicinity of each first steam jet 28. ing. Reference numeral 28 a denotes a first steam outlet provided in an inclined portion 27 a formed around the top plate 27.

  FIG. 6 is an enlarged view of the steam duct 19 in FIG. Hereinafter, the features of the present invention will be described in detail with reference to FIG.

  As shown in FIG. 6, a partition plate 37 that partially partitions the inside of the first duct portion 20 into two upper and lower stages is disposed below the middle in the up-down direction within the first duct portion 20. And the superheated steam production | generation heater 23 is arrange | positioned in the circulation part 38 of the lower stage. That is, the superheated steam generating heater 23 is disposed immediately above the top plate 27 of the cooking chamber 13.

  That is, in the present embodiment, the superheated steam generating heater 23 constitutes the heater in the claims.

  The upstream end of the steam flow in the partition plate 37 is bent upward at an angle of about 45 degrees with respect to the main body of the partition plate 37 and attached to the top surface of the first duct portion 20. The bent portion of the partition plate 37 divides and partitions the inlet and outlet of the first duct portion 20 between the upstream side and the downstream side of the steam flow, and the openings of the four connecting pipes 25a to 25d. And has a function of directing the flow of saturated water vapor ejected from the connecting pipes 25a to 25d toward the superheated steam generation heater 23 side. Hereinafter, the bent portion in the partition plate 37 is referred to as a partition portion 37a.

  When the partition plate 37 is not disposed in the first duct portion 20, the superheated steam generating heater is disposed relatively loosely in the first duct portion 20. Therefore, the saturated water vapor immediately after being blown into the first duct portion 20 from the connecting pipes 25a to 25d tends to flow toward the bent portion 21 while avoiding the superheated steam generating heater functioning as a resistor. Therefore, heat exchange between the saturated steam blown into the first duct portion 20 and the superheated steam generating heater is not performed efficiently on the upstream side where the flow rate of the saturated steam is high. Furthermore, the distance from the superheated steam generation heater to the first steam outlet 28 is long, and the heat of the superheated steam obtained by heat exchange with the superheated steam generation heater is not easily transmitted to the object 31 to be heated.

  Therefore, in the present embodiment, the superheated steam generation heater 23 is disposed immediately above the top plate 27 of the cooking chamber 13 and is bent upward at an angle of approximately 45 degrees upstream of the partition plate 37. A partition portion 37a is provided for directing the flow of saturated steam blown from the connection pipes 25a to 25d toward the superheated steam generation heater 23 side. Therefore, the saturated steam immediately after being blown into the first duct portion 20 is forced to pass through the location of the superheated steam generating heater 23 as shown by the arrow in FIG. The heat exchange efficiency between the saturated steam and the superheated steam generating heater 23 on the upstream side of the fast first duct portion 20 can be increased.

  Further, as can be seen from FIG. 5, the occupation area of the superheated steam generation heater 23 and the first steam outlet 28 is made larger on the upstream side of the steam flow in the first duct portion 20 than on the downstream side. . Accordingly, the amount of heat exchange between the saturated steam and the superheated steam generating heater 23 on the upstream side of the first duct portion 20 can be increased, and the amount of spray into the cooking chamber 13 can be increased.

  As described above, according to the present embodiment, the heat exchange efficiency and heat exchange amount between the saturated steam and the superheated steam generation heater 23 on the upstream side of the first duct portion 20 are increased, and the heat cooking chamber 13 is moved into. Since the amount of the superheated steam ejected can be increased, the color of the object to be heated 31 can be made uniform between the upstream side and the downstream side of the saturated steam flow. As a result, the cooking time can be shortened.

  Further, on the upstream side of the first duct portion 20, the superheated steam generating heater 23 is installed along the partition portion 37a on the downstream side in the vicinity of the partition portion 37a. The first steam outlet 28 provided on the top plate 27 of the cooking chamber 13 is disposed along the downstream side in the vicinity of the superheated steam generating heater 23. Therefore, the direction of the flow is forcibly changed to the superheated steam generation heater 23 side by the partition portion 37a, and the superheated steam after efficiently exchanging heat with the superheated steam generation heater 23 immediately becomes the first downstream side. The steam is ejected from the steam outlet 28 toward the center of the cooking chamber 13. As a result, the superheated steam is likely to directly hit the article 31 to be heated. Therefore, in combination with the short distance from the superheated steam generating heater 23 to the first steam outlet 28, the heat of the superheated steam obtained by heat exchange with the superheated steam generating heater 23 is sufficient for the object 31 to be heated. The heating efficiency of the article to be heated 31 can be increased. Therefore, the cooking time can be shortened.

  In the present embodiment, the angle of the partition portion 37a with respect to the main body of the partition plate 37 is set to approximately 45 degrees, but the present invention is not limited to approximately 45 degrees. However, if it exceeds 45 degrees, the saturated water vapor that hits the partition portion 37a generates turbulent flow, and therefore it is preferably 45 degrees or less.

  Further, in the present embodiment, the lowermost angle of the partition portion 37a is made larger than 45 degrees and sprayed downward toward the superheated steam generating heater 23 extending along the downstream side of the partition portion 37a. I am doing so. In this case, the length of the partition portion 37a along the lowermost vapor flow is extremely shorter than the length other than the lowermost portion. Therefore, turbulent flow is not generated in the saturated water vapor due to the presence of the lowermost portion having an angle larger than 45 degrees.

  The steam that has not been ejected from the first steam ejection port 28 on the upstream side of the first duct portion 20 enters the lower circulation portion 38 that is partitioned into two upper and lower stages by the partition plate 37 in the first duct portion 20. Inflow. The inside of the circulation part 38 is narrower in the vertical direction than the upstream side of the first duct part 20. Therefore, the flow rate of the steam is increased in the circulation part 38.

  Here, the vertical width of the circulation part 38 is narrower than the upstream side of the first duct part 20, and the superheated steam generation heater 23 is disposed in the narrow circulation part 38. Therefore, the saturated water vapor that has flowed into the circulation section 38 is heated in a short time to become superheated steam. Therefore, if the generated superheated steam stays in the circulation unit 38 for a long time, the heat exchange efficiency between the saturated water vapor and the superheated steam generation heater 23 in the circulation unit 38 is lowered.

  Therefore, in the present embodiment, the steam flow rate in the circulation unit 38 is increased to expedite the discharge of superheated steam after heat exchange, and the saturated steam and the superheated steam generation heater 23 in the circulation unit 38 are discharged. It increases the heat exchange efficiency.

  In addition, air is sealed in the upper stage where the inside of the first duct part 20 is partitioned into two upper and lower stages by the partition plate 37, and an air heat insulating layer is formed outside the circulation part 38. Furthermore, since the volume of the circulating portion 38 is small by the narrow width in the vertical direction, there is no place where superheated steam stays inside, and there is no heat dissipation due to staying steam. Therefore, the inside of the circulation part 38 becomes a heat insulation state and the internal temperature increases. Moreover, the partition plate 37 is comprised with the metal, The surface is a mirror surface and reflects heat. From the above, it is possible to prevent the heat in the circulation part 38 from escaping to the outside. Therefore, the temperature of the top plate 27 of the cooking chamber 13 is increased, and the radiant heat to the cooking chamber 13 is increased, so that the heating efficiency of the object to be heated 31 can be increased.

  Further, on the downstream side of the steam flow in the circulation portion 38, the partition plate 37 is bent upward to widen the vertical interval of the circulation portion 38, thereby forming an enlarged portion 39 in which the passage area is enlarged. Hereinafter, a region having a narrow vertical width between the partition portion 37 a and the enlarged portion 39 in the circulation portion 38 is referred to as a narrow portion 40. By forming the enlarged portion 39 in this manner, as described above, the resistance to the superheated steam after efficiently exchanging heat with the superheated steam generating heater 23 in the circulation portion 38 is eliminated, and the bent portion 21 is interposed. Thus, it can be supplied to the second duct portion 22 as a laminar flow.

  In other words, in the present embodiment, the narrow plate portion forming portion in the above claims is constituted by the part of the partition plate 37 forming the narrow portion 40. Further, the entire partition plate 37 constitutes the air heat insulating layer forming member in the claims. Further, the portion of the partition plate 37 forming the enlarged portion 39 constitutes the enlarged portion forming portion in the claims.

  The superheated steam supplied to the second duct portion 22 is jetted into the cooking chamber 13 from a plurality of second steam jets 29 provided on the left side surface of the cooking chamber 13. In that case, when performing the two-stage cooking by installing the tray 30 in two stages, if the upper and lower heated objects 31 are baked cleanly, it is necessary to make the superheated steam flow flowing in the second duct portion 22 uniform. There is. For this purpose, an enlarged portion 39 is provided on the downstream side of the circulating portion 38 to rectify the steam flow to the bent portion 21 and prevent it from becoming a drift.

  Further, the superheated steam ejected from the second steam outlet 29 mainly performs coloring of the back surface of the upper heated object 31 and cooking of the lower heated object 31 during the two-stage cooking. . Therefore, in order to effectively exert the above two functions on the superheated steam from the second steam jet outlet 29, a part of the superheated steam generating heater 23 is positioned in the enlarged part 39 of the circulation part 38, and the enlarged part. The temperature drop of the superheated steam in 39 is prevented.

  Here, the shape of the partition plate 37 is such that the interval between the narrowest portions in the region where the steam circulates in the first duct portion 20, that is, the interval H1 in the vertical direction in the narrow portion 40 of the circulation portion 38 is the largest in the bent portion 21. It is set so as not to fall below the narrow space H2. When the interval H1 is narrower than the interval H2, the circulation of the superheated steam in the first duct portion 20 is deteriorated, which has an adverse effect particularly during oven cooking.

  As described above, in the present embodiment, by arranging the partition plate 37 having a recess in the middle portion in the direction of the steam flow in the first duct portion 20, the downstream side in the first duct portion 20. Approximately 3/4 is divided into two upper and lower stages. Then, the superheated steam generating heater 23 is disposed in the lower circulation unit 38 and the saturated steam from the circulation unit 14 is supplied into the circulation unit 38, while the superheated steam generated in the circulation unit 38 is bent. 21 is supplied.

  Therefore, the vertical width of the narrow portion 40 of the circulation portion 38 formed by the concave portion of the partition plate 37 is narrower than the upstream side of the narrow portion 40, and the flow rate of the steam supplied from the circulation unit 14 is increased. As a result, the heat exchange efficiency between the saturated steam and the superheated steam generation heater 23 can be increased.

  An air heat insulating layer is formed outside the circulating portion 38. Furthermore, since the volume of the narrow portion 40 is small, there is no place where the superheated steam stays inside, and there is no heat dissipation due to the staying steam. Therefore, the inside of the circulation part 38 becomes a heat insulation state and the internal temperature is increased. Therefore, the temperature of the top plate 27 of the cooking chamber 13 becomes high, and the radiant heat to the cooking chamber 13 can be increased.

  That is, the heating efficiency of the article 31 to be heated in the cooking chamber 13 can be increased, and the cooking time can be shortened.

  Incidentally, as described above, the vertical width of the narrow portion 40 of the circulating portion 38 is very narrow. And the superheated steam production | generation heater 23 is penetrated in the narrow narrow part 40. As shown in FIG. In that case, when the superheated steam generating heater 23 comes into contact with the partition plate 37 and the top plate 27 of the cooking chamber 13, the heat of the superheated steam generating heater 23 is taken away through the contacting partition plate 37 or the top plate 27. End up. Therefore, it is necessary to install the superheated steam generation heater 23 so as not to contact the partition plate 37 and the top plate 27 in the narrow narrow portion 40.

  Therefore, in the present embodiment, as shown in FIGS. 5 and 6, the superheated steam generating heater 23 is connected to the partition plate 37 and the top plate 27 by the heater fixing angle 41 in the narrow portion 40 as follows. It fixes so that it may not touch.

  FIG. 7 is an enlarged view of the heater fixing angle 41 in FIG. The heater fixing angle 41 is formed by punching a single metal plate having elasticity into a substantially rectangular shape and then deforming it so as to be symmetrical in FIG. 7 in a sectional view in the longitudinal direction. That is, the heater fixing angle 41 has a mounting portion 42 formed of a flat surface for fixing to the partition plate 37 by a hammer or the like at an intermediate portion in the longitudinal direction. Furthermore, on both sides of the attachment portion 42, there is a heater holding portion 43 that is bent in the vertical direction and provided with a curved portion that is bent in a semicircular shape and fitted with the superheated steam generating heater 23. . Furthermore, the contact part 44 which contacts the top plate 27 of the heating cooking chamber 13 which functions as a lower surface of the 1st duct part 20 while being a surface parallel to the attachment part 42 in the front-end | tip part of each heater holding | maintenance part 43. have. Each contact portion 44 is formed with a protruding portion 45 having a cross-sectionally curved semi-circular shape toward the outside (the top plate 27 side).

  In the heater fixing angle 41, when the mounting portion 42 is fixed to the partition plate 37 by the flange 46, the distance between the apex of the protrusion 45 and the mounting portion 42 is greater than the distance between the top plate 27 and the partition plate 37. It is formed to be slightly wider. Therefore, when the partition plate 37 to which the heater fixing angle 41 is fixed is attached to the first duct portion 20 and the first duct portion 20 is installed on the top plate 27 of the heating cooking chamber 13, The attachment portion 42 and the contact portion 44 are biased by the partition plate 37 and the top plate 27. As a result, the heater fixing angle 41 holding the superheated steam generating heater 23 by the heater holding portion 43 is fixed between the top plate 27 and the partition plate 37 by an elastic force that opposes the biasing force, and generates superheated steam. The heater 23 can be fixed apart from the top plate 27 and the partition plate 37.

  Furthermore, the top plate 27 of the cooking chamber 13 may be slightly deformed by the heat in the cooking chamber 13 or the like. Even in that case, since the contact portion 44 is deformed by elasticity, the superheated steam generating heater 23 is held between the top plate 27 and the partition plate 37 and does not come into contact with the top plate 27.

  Further, the heater fixing angle 41 is formed so as to be symmetrical in the left-right direction in FIG. 7, and the directions of the two curved portions are the same. Therefore, as shown in FIG. 5, two locations of one superheated steam generating heater 23 can be simultaneously fitted to different curved portions by one operation, and workability at the time of assembly can be improved.

  Further, the top plate 27 of the cooking chamber 13 is painted black to efficiently absorb the heat of the circulating portion 38. On the other hand, the heater fixing angle 41 is formed by deforming one metal plate punched by a sheet metal press so as to be symmetrical in FIG. Accordingly, burrs are generated on the contact surface with the top plate 27 in one of the two contact portions 44. For this reason, the burr generated on the contact surface of the contact portion 44 with the top plate 27 peels off the black paint painted on the top plate 27 and causes rust. Therefore, in the present embodiment, the protrusion 45 is formed by stamping outside the contact portion 44 (on the top plate 27 side), and the contact of the contact portion 44 with the top plate 27 is made of the protrusion 45 having a smooth surface. It is done on a curved surface. Therefore, the paint on the top plate 27 can be protected.

  That is, in the present embodiment, the heater fixing angle 41 constitutes the elastic attachment member in the claims.

  As shown in FIGS. 5 and 6, the superheated steam generating heater 23 is fixed so as not to contact the partition plate 37 and the top plate 27 by the heater fixing angle 47 in the enlarged portion 39 of the circulating portion 38. . The heater fixing angle 47 is not formed so as to be symmetric in FIG. 6, and the interval between the mounting portion and the apex of the protrusion is larger than the interval between the partition plate 37 and the top plate 27 in the enlarged portion 39. The basic configuration is the same as that of the heater fixing angle 41 except that it is formed so as to be slightly wider.

  In the present embodiment, the heater fixing angles 41 and 47 are attached to the partition plate 37, but can be attached to the top plate 27. However, from the viewpoint of protecting the black paint painted on the top plate 27, it is preferable to attach it to the partition plate 37. Furthermore, the heater fixing angles 41 and 47 are not attached to either the partition plate 37 or the top plate 27, but are fixed only by the urging force to the partition plate 37 and the top plate 27 due to the elasticity of the heater fixing angles 41 and 47. It doesn't matter if you do.

  Moreover, in this Embodiment, although the said 1st duct part 20 is attached to the top | upper surface of the heating cooking chamber 13, it is also possible to attach to the back surface etc. of the heating cooking chamber 13. FIG. In short, it is only necessary to be arranged along one surface of the cooking chamber 13 so that the gas supplied from one side is heated and discharged from the other side opposite to the one side. It is.

  Moreover, in this Embodiment, the said heating duct in the said claim is comprised by the 1st duct part 20 of the superheated steam production | generation apparatus 24, the saturated steam which is the said heat medium is heated, and superheated steam is made. It is trying to generate. However, the present invention is not limited to this, and can also be applied to a heating cooker that heats the air as the heat medium and heats the object to be heated with the generated hot air. That is, the heat medium may be any of “steam”, “superheated steam”, and “air”.

1 ... casing,
11 ... Water tank,
12 ... steam generator,
13 ... Cooking room,
14 ... circulation unit,
17 ... circulation fan,
19 ... Steam duct,
20 ... 1st duct part,
21 ... bent portion,
22 ... the second duct part,
23 ... Superheated steam generating heater,
25, 25a to 25d ... connecting pipe,
27 ... Top plate of cooking room,
28, 28a ... first steam outlet,
29 ... second steam outlet,
31 ... object to be heated,
35 ... Rotating antenna,
37 ... partition plate,
37a ... partitioning part,
38. Circulation part,
39 ... Enlarged part,
40 ... Narrow part,
41, 47 ... Heater fixing angle,
42 ... Mounting part,
43 ... heater holding part,
44 ... contact part,
45. Projection.

Claims (11)

A cooking chamber for cooking the object to be heated;
A ceiling heat medium which is located on the top surface of the cooking chamber and has a heater for heating the heat medium, and which ejects the heat medium from the plurality of jet nozzles provided on the top surface toward the cooking chamber. A heating chamber;
A circulation duct for circulating a heat medium between the heating cooking chamber and the ceiling heat medium heating chamber;
A fan for circulating the heat medium,
An air heat insulation layer forming member for forming an air heat insulation layer is provided on the top of the ceiling heat medium heating chamber,
The heater is disposed between the air heat insulating layer forming member and the top surface of the cooking chamber,
The air heat insulating layer forming member is provided so as to bulge toward the heating cooking chamber from a position on the top surface of the ceiling heating medium heating chamber from the inner side of both ends in the flow direction of the heating medium. A cooking device characterized by. The heating cooker according to claim 1, wherein
The heating cooker, wherein the air heat insulating layer forming member is made of metal and at least an inner surface is a mirror surface. In the heating cooker according to claim 1 or 2,
A portion of the air heat insulating layer forming member facing the inlet side of the ceiling heat medium heating chamber is inclined so as to guide the heat medium obliquely downward. In the heating cooker according to claim 1 to 3,
The air insulation layer forming member includes a narrow portion forming portion that forms a narrow portion between the inlet and the outlet of the ceiling heat medium heating chamber, and a part of the heater is disposed in the narrow portion. A heating cooker characterized by In the heating cooker according to any one of claims 1 to 4,
In plan view, the occupied area of the heater portion located upstream from the middle between the inlet and the outlet of the ceiling heat medium heating chamber is other than the heater located downstream from the middle. A cooking device characterized by being larger than the area occupied by the portion. In the heating cooker according to any one of claims 1 to 5,
The heating cooker characterized in that the heater portion is located in the vicinity of the jet nozzle and upstream of the flow of the heat medium in the ceiling heat medium heating chamber. The cooking device according to claim 4, wherein
The air heat insulation layer forming member has an enlarged portion forming portion that forms an enlarged portion having a passage area larger than the passage area of the narrow portion on the downstream side of the narrow portion,
The heating cooker characterized in that the heater portion is located in the enlarged portion. The heating cooker according to claim 7, wherein
A cooking device according to claim 1, wherein at least one of the spouts is located in the enlarged portion. In the heating cooker according to any one of claims 1 to 8,
The heating cooker according to claim 1, wherein the ceiling heat medium heating chamber is a superheated steam generation chamber that superheats steam to form superheated steam. In the heating cooker according to any one of claims 1 to 9,
The heater is clamped by an elastic elastic attachment member and attached to the ceiling heat medium heating chamber by the elastic attachment member with a gap with respect to the upper surface and the lower surface of the ceiling heat medium heating chamber. A heating cooker featuring. The heating cooker according to claim 10, wherein
One end of the elastic mounting member is attached to the ceiling heat medium heating chamber, while the other end of the elastic mounting member is a curved convex surface, and the curved convex surface is on the inner surface of the ceiling heat medium heating chamber. A heating cooker characterized by non-fixed contact.

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