CN103635751A - Heating cooker - Google Patents

Abstract

A partition plate (37) which partitions the first duct section (20) into upper and lower layers is provided with a partition section (37 a) on the upstream side thereof, and the partition section (37 a) is bent upward at an angle of substantially 45 degrees so that the flow of the saturated steam jetted from the connection pipe (25 d) is directed toward the superheated steam-generating heater (23). Thus, the saturated steam blown into the first pipe section (20) forcefully passes through the part of the superheated steam-generating heater (23) forcibly, thereby improving the heat exchange efficiency between the saturated steam and the superheated steam-generating heater (23) on the upstream side of the first pipe section (20) where the flow rate of the saturated steam is high. Therefore, the color of the heated object can be made uniform on the upstream side and the downstream side of the saturated water vapor flow, and as a result, the cooking time can be shortened.

Description

heating cooker

technical field

The present invention relates to a heating cooker for heating an object to be heated by supplying a heat medium heated in a chamber provided along the top surface of the heating cooking chamber into the heating cooking chamber.

Background technique

Conventionally, as a heating cooker, there exists a heating cooker disclosed in Unexamined-Japanese-Patent No. 2009-281637 (patent document 1).

In the above-mentioned conventional heating cooker, air is supplied from a blower (fan) arranged behind the heater chamber to the heater chamber arranged on the upper part of the cooking chamber for heating, and the obtained hot air is sent from a A plurality of wells on the perforated plate provide access to the cooking chamber. Thus, the cooking items in the cooking chamber are heated by the hot air supplied into the cooking chamber.

However, the above-mentioned conventional heating cooker has the following problems.

That is, in the above-mentioned conventional heating cooker, the heater chamber is formed in a rectangular parallelepiped box shape having substantially uniform height and width as a whole, and a plurality of U-shaped heaters are arranged at substantially uniform intervals inside. In addition, a plurality of holes are substantially evenly arranged on the perforated plate on the top surface of the cooking chamber. As mentioned above, when the heater is loosely arranged in the box-shaped, wide heater chamber, since the heater acts as a resistance member, the heater from the rear (upstream side) is strongly The air blown by the fan into the heater chamber flows forward (downstream side) while avoiding the position of the heater as a resistance member. Therefore, the heat exchange between the wind (air) blown into the heater chamber and the heater is not effectively carried out on the upstream side where the flow velocity of the wind (air) is relatively fast, but mainly on the side where the flow velocity of the wind decreases. And the wind is carried out through the downstream side in the vicinity of the above-mentioned heater. In addition, the heat-exchanged air tends to stay on the downstream side, so that the temperature distribution in the heater chamber becomes higher than that on the downstream side.

As a result, the temperature of the hot air supplied to the cooking chamber from the plurality of holes in the perforated plate arranged on the ceiling of the cooking chamber is uneven, and the temperature on the downstream side is higher than that on the upstream side. The color of the heated object is determined by the heat of the hot air blown from the holes of the perforated plate to the cooking chamber and the radiant heat from the perforated plate. Therefore, the color of the heated object is darker on the downstream side. In addition, if the color of the heated object is to be uniform as a whole, the temperature of the above-mentioned heater needs to be set low, and the position of the object to be heated needs to be changed during the overheating process, so there is a problem that the cooking time becomes longer. .

In the above-mentioned conventional heating cooker, a guide plate having an opening on the downstream side is arranged horizontally below the heater chamber, and a space is provided between the guide plate and the perforated plate so that the heat passing through and the heating After heat exchange, the air that becomes hot air enters the above-mentioned space, and then blows out from the holes of the above-mentioned perforated plate to the above-mentioned cooking chamber. Therefore, although the temperature distribution in the above-mentioned space is uniform, the temperature of the air that becomes hot air after exchanging heat with the above-mentioned heater drops before reaching the holes of the above-mentioned perforated plate, so there is also a problem that the cooking time becomes longer.

Patent Document 1: Japanese Patent Laid-Open Publication No. 2009-281637.

Contents of the invention

An object of the present invention is to provide a heating cooker capable of making the color of the entire heated object uniform in a short time.

In order to solve the above-mentioned problems, the present invention provides a heating cooker, which is characterized in that it includes: a heating cooking chamber for heating and cooking an object to be heated; a top heat medium heating chamber located on the top surface of the heating cooking chamber, There is a heater for heating the heat medium, and the above-mentioned heat medium is sprayed into the above-mentioned heating cooking chamber from a plurality of ejection ports provided on the above-mentioned top surface; the circulation pipeline makes the above-mentioned heat medium flow between the above-mentioned heating cooking chamber and the above-mentioned top surface circulation in the heat medium heating chamber; and a fan for circulating the heat medium, wherein a spacer member is provided between the entrance and the exit of the heat medium heating chamber on the top surface, and the spacer member narrows the heat medium The upstream side and the downstream side of the heater are separated, and a part of the heater is located on the upstream side of the partition member.

According to this structure, a spacer member is provided between the inlet and outlet of the top surface heat medium heating chamber located on the top surface of the heating cooking chamber, and the space member narrows the upstream side and the downstream side of the heat medium. separated, and a part of the heater is located on the upstream side of the above-mentioned partition member. Therefore, the ejection force from the ejection port can be increased on the upstream side of the partition member, and the heat medium can be ejected from the upstream ejection port into the entire heating and cooking chamber.

Thereby, the color of the object to be heated after being heated can be made uniform on the upstream side and the downstream side of the flow of the heat medium, and the cooking time can be shortened.

Moreover, in the heating cooker which concerns on one Embodiment, the said partition member inclines so that a heat medium may be guided obliquely downward.

According to the above-described embodiment, since the heat medium is guided obliquely downward by the partition member, the heat medium can be sprayed obliquely downward and toward the entire heating and cooking chamber from the discharge port upstream of the partition member. Therefore, temperature unevenness can be reduced, and the heat medium can be smoothly ejected obliquely downward by making the inclination angle of the spacer member an angle that does not hinder the flow of the heat medium.

In addition, a heating cooker according to one embodiment further includes a narrow portion forming member connected to the partition member to form a narrow portion, and a part of the heater is disposed in the narrow portion.

According to the above-mentioned embodiment, since the narrow portion connected to the spacer member is formed, and a part of the heater is arranged in the narrow portion, the portion where the heat medium passes through the heater improves the distance between the heat medium and the heater. heat exchange efficiency between them.

In addition, since the flow velocity of the heat medium is high in the narrow portion, heat exchange efficiency between the heater and the heat medium can be improved.

Moreover, since the distance from the said heater to the said discharge port is short, the heat obtained by the heat exchange with the said heater can fully transfer to the object to be heated in the said heating cooking chamber. Therefore, the heat exchange efficiency of the said upstream side and the said downstream side of the said top surface heat medium heating chamber can be improved, and shortening of heat cooking time can be aimed at.

In addition, in the heating cooker according to one embodiment, the occupied area of a part of the heater located upstream from the middle between the inlet and the outlet of the top heat medium heating chamber in plan view is It is larger than the occupation area of another part of the heater located on the downstream side of the above-mentioned middle.

According to the above-mentioned embodiment, since a portion of the heater located on the upstream side of the ceiling heat medium heating chamber occupies an area larger than that on the downstream side, it is possible to effectively discharge heat that needs to be discharged from the discharge port on the upstream side. The medium is heated.

Moreover, in the heating cooker of one Embodiment, a part of said heater is located in the vicinity of the said discharge port, and the upstream side of the heat medium flow in the said top surface heat medium heating chamber.

According to the above-mentioned embodiment, since a part of the heater is located in the vicinity of the discharge port and on the upstream side, the heat medium to be discharged from the discharge port can be efficiently heated before the heat medium is discharged.

In addition, in a heating cooker according to an embodiment, an enlarged portion is provided on the downstream side of the narrowed portion, the passage area of the enlarged portion is larger than the passage area of the narrowed portion, and a part of the heater is located in the enlarged portion. department.

According to the above embodiment, since the enlarged portion is provided downstream of the narrowed portion and part of the heater is located in the enlarged portion, pressure loss can be reduced and temperature drop of the heat medium in the enlarged portion can be prevented.

Moreover, in the heating cooker which concerns on one Embodiment, at least one said discharge port is located in the said enlarged part.

According to the above-mentioned embodiment, since the discharge port is located in the enlarged portion, the heat medium is discharged downward from the discharge port in a more vertical state in the enlarged portion.

In addition, in the heating cooker according to one embodiment, the position of the discharge port of the narrow portion is located on the downstream side of the flow of the heat medium in the heating medium heating chamber on the top surface or on the downstream side of the position of a part of the heater. At the same position, the occupied area of the discharge port in the narrowed portion is larger than the occupied area of the expanded portion in plan view.

According to the above-mentioned embodiment, since the position of the above-mentioned ejection port is located on the downstream side of the above-mentioned heater in the flow of heat medium or at the same position in the above-mentioned narrow part, the above-mentioned heat medium heated by the above-mentioned heater can be immediately transferred from the position of the above-mentioned The above-mentioned discharge port on the side directly below or downstream of the heater discharges. In addition, since the discharge port occupies an area larger in the narrow portion than in the enlarged portion, an amount of the heat medium blown out from the narrow portion is larger than that of the enlarged portion.

Moreover, in the heating cooker of one Embodiment, the said top surface heat medium heating chamber is a superheated-steam generating chamber which superheats steam and turns it into superheated steam.

According to the above-described embodiment, when the object to be heated is heated and cooked with superheated steam, the color of the object to be heated after heating can be made uniform, and the cooking time can be shortened.

In addition, in one embodiment of the heating cooker, the heater is sandwiched by an elastic elastic mounting member, and the elastic mounting member is used to have a gap with respect to the upper surface and the lower surface of the top heat medium heating chamber. The above-mentioned heater is installed in the above-mentioned top surface heat medium heating chamber in the same way.

According to the above-mentioned embodiment, since the heater sandwiched by the elastic mounting member is mounted in the top heat medium heating chamber with a gap between the upper surface and the lower surface, even the top heat medium heating chamber The lower surface is thermally deformed, and the heater can be fixed so as to be separated from the upper surface and the lower surface of the top surface heat medium heating chamber. Therefore, the heat medium can pass above and below the heater, and heat of the heater can be prevented from being absorbed by the upper and lower surfaces of the top heat medium heating chamber, thereby improving heat exchange efficiency.

In addition, in one embodiment of the heating cooker, one end of the above-mentioned elastic mounting member is installed on the above-mentioned top heat medium heating chamber, and the other end of the above-mentioned elastic mounting member is a curved convex surface, and the curved convex surface is not fixed. The way is in contact with the inner surface of the above-mentioned top heat medium heating chamber.

According to the above-mentioned embodiment, since the curved convex surface provided on the other end of the above-mentioned elastic mounting member abuts against the inner surface of the above-mentioned top heat medium heating chamber in a non-fixed manner, the influence of thermal expansion can be reduced, and there will be no Damage above the top surface of the heat medium heating chamber.

As described above, since the heating cooker of the present invention provides a spacer member between the inlet and the outlet of the top surface heat medium heating chamber located on the top surface of the heating cooking chamber, the spacer member narrows the upstream of the heat medium by one The side and the downstream side are separated, and a part of the heater is located on the upstream side of the above-mentioned partition member, so the discharge force from the discharge port can be improved on the upstream side of the above-mentioned partition member, and it can be obtained from The discharge port on the upstream side discharges the heat medium to the entire heating and cooking chamber. Therefore, the heated color of the object to be heated can be made uniform on the upstream side and the downstream side of the flow of the heat medium, and the cooking time can be shortened.

Description of drawings

Fig. 1 is a front perspective view of the heating cooker of the present invention.

Fig. 2 is a schematic longitudinal sectional view viewed from the front side of the heating cooker shown in Fig. 1 .

Fig. 3 is a plan view of the heating and cooking chamber in a state where the casing is removed.

Fig. 4 is a cross-sectional view viewed from the direction of the arrow AA' in Fig. 3 .

Fig. 5 is a top view of the heating cooking chamber shown in Fig. 3 with the steam pipe removed.

FIG. 6 is an enlarged view of the steam pipe of FIG. 4 .

Fig. 7 is an enlarged view of the heater fixing angle iron of Fig. 6 .

Explanation of reference signs

1 shell

11 water storage container

12 steam generating device

13 Heating the cooking chamber

14 cycle units

17 circulation fan

19 steam pipe

20 First Pipeline Department

21 bending part

22 Second Pipeline Department

23 superheated steam generating heater

25, 25a～25d connecting pipe

27 Heating the cooking cabinet roof

28, 28a The first steam outlet

29 Second steam outlet

31 heated object

35 Rotate Antenna

37 Partition board

37a Partition

38 Circulation Department

39 Expansion Department

40 narrow part

41, 47 Heater fixed angle iron

42 Installation Department

43 Heater holding part

44 contact part

45 protrusions

Detailed ways

Hereinafter, the present invention will be described in detail using the illustrated embodiments.

Fig. 1 is a front perspective view of the heating cooker according to the present embodiment. The above-mentioned heating cooker is provided with a door 2 on the front surface of a rectangular parallelepiped casing 1, and the door 2 rotates substantially around the lower end side. The handle 3 is attached to the upper part of the said door 2, and the heat-resistant glass 4 is attached to the substantially center on the other hand. In addition, an operation panel 5 is provided on the right side of the door 2 in the figure. The operation panel 5 has a color liquid crystal display unit 6 and a button group 7 . In addition, an exhaust duct 8 is provided on the upper right rear side of the casing 1 . In addition, a dew-receiving container 9 is installed under the door 2 of the casing 1 .

Fig. 2 is a schematic longitudinal sectional view viewed from the door 2 side (front side) of the heating cooker shown in Fig. 1 . As shown in FIG. 2 , the above-mentioned heating cooker heats water supplied from a water storage container 11 by a steam generator 12 to generate saturated steam as a heat medium. The saturated water vapor generated by the steam generating device 12 is provided to the heating cooking chamber 13 of the steam suction port 15 of the circulation unit 14 installed on the right side of the figure in the drawing of the heating cooking chamber 13 through a steam supply channel (not shown). side, and sprayed from the steam supply pipe 16 connected to the above-mentioned steam supply channel.

The steam supply pipe 16 is installed in the vicinity of the steam suction port 15 of the circulation unit 14 so as to be parallel to the above-mentioned right side surface of the heating cooking chamber 13 . Moreover, the circulation fan 17 is arrange|positioned so that it may oppose the steam suction port 15 in the circulation unit 14, This circulation fan 17 is driven and rotated by the fan motor 18. As shown in FIG.

An L-shaped curved steam duct 19 is provided so as to cover the top surface and the left side surface in the figure of the heating cooking chamber 13 . Above-mentioned steam pipeline 19 comprises: first pipeline part 20, is fixed on the top surface of heating cooking chamber 13; The left side surface of the heating cooking chamber 13 is connected with the first duct part 20 through the bent part 21 .

A superheated steam generation heater 23 is accommodated in the first duct portion 20 of the steam duct 19 . Furthermore, a superheated steam generating device 24 is constituted by the first duct portion 20 and the superheated steam generating heater 23 .

In addition, the right side of the first pipe portion 20 of the steam pipe 19 communicates with four steam supply ports 26 through four connection pipes 25 , and the four steam supply ports 26 are provided on the upper part of the circulation unit 14 . The top plate 27 of the heating cooking chamber 13 is provided with a plurality of first steam outlets 28 , and the first pipe portion 20 of the steam pipe 19 communicates with the inside of the heating cooking chamber 13 through the first steam outlets 28 . On the other hand, the second pipe portion 22 of the steam pipe 19 communicates with the inside of the cooking chamber 13 through a plurality of second steam outlets 29 provided on the left side of the cooking chamber 13 .

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

That is, in the present embodiment, the above-mentioned ceiling heating medium heating chamber within the scope of the claims is constituted by the above-mentioned first duct portion 20 .

A steam circulation path is formed by the circulation unit 14, the superheated steam generator 24, the heating cooking chamber 13, and the connecting member connecting them. And the saturated water vapor|steam generated by the steam generator 12 is supplied to the boundary part with the heating cooking chamber 13 of the circulation unit 14 of the said circulation path. Then, the supplied saturated water vapor is forcibly sucked from the steam inlet 15 into the circulation unit 14 which is turned into a negative pressure by the rotation of the circulation fan 17, and merges with the circulation airflow circulating in the above-mentioned circulation path.

As a result, the saturated water vapor sucked into the circulation unit 14 is ejected from the steam supply port 26 into the superheated steam generator 24 . Then, it is heated by the superheated steam generating heater 23 to become superheated steam. A part of the above-mentioned superheated steam is sprayed downward in the heating and cooking chamber 13 from a plurality of first steam outlets 28 provided on the top plate 27 of the heating and cooking chamber 13 on the lower side in the drawing. In addition, another part of the superheated steam passes through the bent portion 21 and the second duct portion 22 , and is ejected into the heating and cooking chamber 13 from the second steam outlet 29 of the heating and cooking chamber 13 .

Thus, the upper side of the object to be heated 31 placed on the tray 30 in the heating cooking chamber 13 is mainly heated by the superheated steam from the first steam outlet 28, and the lower side of the object to be heated 31 is mainly heated by the second steam. The superheated steam from the outlet 29 is heated. The superheated steam after the heated object 31 is heated repeats the following cycle: it is sucked into the circulation unit 14 from the suction port 32 formed opposite to the steam suction port 15 of the circulation unit 14 on the above-mentioned right side of the heating cooking chamber 13. and return to the heating and cooking chamber 13 again through the above-mentioned steam circulation path.

In addition, locking portions 33 a , 33 b , and 33 c for locking both ends of the tray 30 are provided on the right side and the left side of the cooking chamber 13 vertically into three layers.

Moreover, the magnetron which is not shown in figure is arrange|positioned in the lower part of the said heating cooking chamber 13. As shown in FIG. Utilize waveguide to guide the bottom center of heating cooking chamber 13 by the microwave that above-mentioned magnetron produces, and utilize rotating antenna 35 driven by electric motor 34 to stir, and radiate toward the top in heating cooking chamber 13, heat to be heated 31 heating. A heating unit is constituted by the above-mentioned superheated steam generating heater 23 and the above-mentioned magnetron.

In addition, a cooling fan (not shown) and electrical components 36 are arranged on the lower side inside the casing 1 . The electrical component 36 includes a drive circuit for driving each part of the heating cooker, a control circuit for controlling the drive circuit, and the like.

Fig. 3 is a plan view of the cooking chamber 13 in a state in which the casing 1 is removed. In FIG. 3 , a steam duct 19 is arranged from the top surface to the left side of the heating cooking chamber 13 . The first pipe part 20 of the steam pipe 19 is located on the top surface of the heating and cooking chamber 13, and four connecting pipes 25a-25a for connecting with the upper part of the circulation unit 14 protrude from the side opposite to the curved part 21 of the first pipe part 20. 25d. Moreover, the terminal part 23a, 23b of the superheated-steam generating heater 23 is protrudingly provided in the side part of the connection pipe 25a-25d side of the 1st pipe part 20. As shown in FIG. In addition, the number of connecting pipes 25 is not limited to four.

Fig. 4 is a cross-sectional view viewed from the direction of the arrow AA' in Fig. 3 . A substantially rectangular hole is provided on the top surface of the heating cooking chamber 13 and is closed by a top plate 27 . In addition, although not shown in FIG. 2 , as shown in FIG. 4 , approximately 3/4 of the bent portion 21 side of the first duct portion 20 is divided into two upper and lower layers by the partition plate 37 over the entire width. In addition, the superheated steam generating heater 23 is arranged in the lower circulation section 38 of the first duct section 20 divided into two upper and lower stages by the partition plate 37 . Here, the four connecting pipes 25 a to 25 d communicate with the circulation unit 38 , and the bent portion 21 of the steam pipe 19 also communicates with the circulation unit 38 . Therefore, the saturated water vapor 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 pipe part 22 through the bent part 21 .

Fig. 5 is a plan view of the heating cooker shown in Fig. 3 in a state where steam pipe 19 is removed. Here, since the superheated steam generating heater 23 is installed and fixed in the steam pipe 19, when the steam pipe 19 is removed, the superheated steam generating heater 23 is also removed, but the superheated steam generating heater is still shown for convenience of explanation. Device 23. A plurality of first steam outlets 28 are provided on the top plate 27 of the heating and cooking chamber 13 , and the superheated steam generation heater 23 is arranged substantially along the upstream side near the respective first steam outlets 28 . In addition, the first steam ejection port 28 a is provided on the inclined portion 27 a formed around the top plate 27 .

FIG. 6 is an enlarged view of the steam pipe 19 of FIG. 4 . Hereinafter, features of the present invention will be described in detail using FIG. 6 .

As shown in FIG. 6 , a partition plate 37 is disposed below the middle of the first duct portion 20 in the vertical direction, and the partition plate 37 partitions a part of the first duct portion 20 into upper and lower layers. In addition, the superheated steam generating heater 23 is arranged in the lower circulation unit 38 . That is, the superheated steam generation heater 23 is arranged directly above the top plate 27 of the heating cooking chamber 13 .

That is, in the present embodiment, the above-mentioned heater within the scope of the claims is constituted by the above-mentioned superheated steam generating heater 23 .

The steam flow upstream end of the partition plate 37 is bent upward at an angle of about 45 degrees relative to the main body of the partition plate 37 and is attached to the top surface of the first duct portion 20 . The curved part of the partition plate 37 has the function of separating the upstream side and the downstream side of the steam flow in a narrowed manner between the inlet and the outlet of the first duct part 20, and is connected with the four connecting pipes. The openings of 25a to 25d face each other, and the flow of the saturated steam jetted from the connecting pipes 25a to 25d is directed toward the superheated steam generating heater 23 side. Hereinafter, the above-mentioned curved portion of the partition plate 37 is referred to as a partition portion 37a.

That is, in the present embodiment, the partition member within the scope of the claims is constituted by the partition plate 37 forming the partition portion 37a.

When the partition plate 37 is not disposed in the first duct portion 20 , the superheated steam generating heater is relatively loosely disposed in the first duct portion 20 . Therefore, the saturated water vapor blown strongly into the first duct portion 20 from the connection pipes 25a to 25d tries to flow toward the bent portion 21 while avoiding the above-mentioned superheated steam generating heaters functioning as resistance members. Therefore, the heat exchange between the saturated steam blown into the first duct portion 20 and the above-mentioned superheated steam generation heater cannot be effectively performed on the upstream side where the flow velocity of the saturated steam is high. In addition, the distance from the superheated steam generating heater to the first steam outlet 28 is long, and it is difficult to sufficiently transfer the heat of the superheated steam obtained by heat exchange with the superheated steam generating heater to the object 31 to be heated.

Therefore, in this embodiment, the above-mentioned superheated steam generation heater 23 is arranged directly above the top plate 27 of the heating cooking chamber 13, and a partition 37a is provided on the upstream side of the partition plate 37, and the partition 37a is roughly It bends upward at an angle of 45 degrees so that the flow of saturated water vapor ejected from the connection pipes 25a to 25d is directed toward the superheated steam generating heater 23 side. Therefore, as shown by the arrow in FIG. 6, the saturated water vapor blown into the first pipe part 20 can be forced to pass through the position of the superheated steam generating heater 23, so the first pipe with a fast flow rate of saturated water vapor can be improved. The heat exchange efficiency between the saturated water vapor on the upstream side of the unit 20 and the superheated steam generation heater 23 .

In addition, as can be seen from FIG. 5 , the occupied areas of the superheated steam generation heater 23 and the first steam discharge port 28 are larger on the upstream side of the steam flow in the first duct portion 20 than on the downstream side. Therefore, the amount of heat exchange between the saturated steam and the superheated steam generating heater 23 can be increased on the upstream side of the first duct portion 20 , and the discharge amount into the cooking chamber 13 can be increased.

As described above, according to the present embodiment, since the heat exchange efficiency and heat exchange amount between the saturated water vapor and the superheated steam generation heater 23 can be improved on the upstream side of the first duct portion 20, and the heating and cooking The amount of superheated steam injected from the chamber 13 is increased, so that the heated object 31 can be heated to a uniform color on the upstream and downstream sides of the flow of saturated steam. Therefore, the cooking time can be effectively shortened.

In addition, on the upstream side of the above-mentioned first duct portion 20, the superheated steam generating heater 23 is provided along the partition portion 37a on the downstream side in the vicinity of the partition portion 37a. Moreover, the 1st steam ejection port 28 provided in the top plate 27 of the heating cooking chamber 13 is arrange|positioned along the downstream side near the superheated-steam generating heater 23. As shown in FIG. Therefore, the spacer 37a is used to forcibly change the flow direction so that the flow direction faces the superheated steam generating heater 23 side, and the superheated steam that has effectively exchanged heat with the superheated steam generating heater 23 is directly sprayed from the first steam on the downstream side. Outlet 28 sprays toward the central part of heating cooking chamber 13 . As a result, the superheated steam easily comes into direct contact with the object 31 to be heated. Therefore, since the distance from the superheated steam generation heater 23 to the first steam discharge port 28 is short, the heat of the superheated steam obtained by heat exchange with the superheated steam generation heater 23 can be sufficiently transferred to the object 31 to be heated. , so that the heating efficiency of the object to be heated 31 can be improved. Therefore, shortening of cooking time can be achieved.

In addition, in this embodiment, although the angle of the said partition part 37a with respect to the main body of the partition plate 37 is set to approximately 45 degrees, this invention is not limited to approximately 45 degrees. However, if it exceeds 45 degrees, turbulence will be generated in the saturated water vapor in contact with the partition 37a, so it is preferably 45 degrees or less.

In addition, in this embodiment, the angle of the lowermost part of the said partition part 37a is made larger than 45 degrees, and air is blown below the superheated-steam generating heater 23 extended along the downstream side of the partition part 37a. At this time, the length along the vapor flow of the lowermost part of the partition part 37a is extremely shorter than the lengths other than the lowermost part. Therefore, no turbulent flow will be generated in the saturated water vapor due to the existence of the above-mentioned lowermost part at an angle greater than 45 degrees.

On the upstream side of the first duct part 20 , the steam not ejected from the first steam outlet 28 flows into the lower circulating part 38 which partitions the first duct part 20 into upper and lower stages by the partition plate 37 . The width in the vertical direction inside the circulation section 38 is narrower than that on the upstream side of the first duct section 20 . Therefore, the flow velocity of the steam becomes faster in the circulation unit 38 .

Here, the vertical width of the circulation part 38 is narrower than that upstream of the first duct part 20 , and the superheated steam generating heater 23 is arranged in the narrow circulation part 38 . Therefore, the temperature of the saturated steam flowing into the circulation unit 38 is raised 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 efficiency of heat exchange between the saturated steam in the circulation unit 38 and the superheated steam generation heater 23 decreases.

Therefore, in this embodiment, the flow velocity of the steam in the above-mentioned circulation part 38 is increased, so that the discharge of the superheated steam that has completed the heat exchange is accelerated, thereby increasing the generation of saturated water vapor and superheated steam in the circulation part 38. The heat exchange efficiency between the heaters 23.

In addition, air is present in the upper layer where the inside of the first duct portion 20 is partitioned into upper and lower layers by the partition plate 37 , and an air heat insulating layer is formed outside the circulation portion 38 . In addition, since the volume of the circulation part 38 is reduced by narrowing the width in the vertical direction, superheated steam does not stay inside, and heat dissipation due to the stagnant steam does not occur. Therefore, the inside of the circulation part 38 becomes a thermal insulation state, and internal temperature becomes high. In addition, the partition plate 37 is made of metal and has a mirror surface, thereby reflecting heat. Accordingly, it is possible to prevent the heat in the circulation unit 38 from being lost to the outside. Therefore, the temperature of the top plate 27 of the heating cooking chamber 13 increases, and the amount of heat radiated into the heating cooking chamber 13 also increases, whereby the heating efficiency of the object 31 to be heated can be improved.

In addition, on the downstream side of the steam flow of the circulation part 38, the partition plate 37 is bent upward to widen the interval in the vertical direction of the circulation part 38 to form an enlarged part 39 with an enlarged passage area. Hereinafter, a narrowed region in the vertical direction sandwiched by the spacer portion 37 a and the enlarged portion 39 of the circulation portion 38 is referred to as a narrowed portion 40 . By forming the enlarged portion 39, as described above, the resistance to the superheated steam that has effectively exchanged heat with the superheated steam generating heater 23 in the circulation portion 38 can be eliminated, and the superheated steam can flow to the second duct portion 22 as a laminar flow through the bent portion 21. supply.

That is, in the present embodiment, the narrow portion forming member within the scope of the claims is constituted by the partition plate 37 that forms the portion of the narrow portion 40 .

The superheated steam supplied into the second duct portion 22 is ejected into the heating and cooking chamber 13 from a plurality of second steam outlets 29 provided on the left side surface of the heating and cooking chamber 13 . At this time, when the tray 30 is arranged in two layers for two-layer cooking, when it is desired to uniformly heat the objects 31 on the upper and lower layers, it is necessary to make the flow of superheated steam flowing in the second duct portion 22 uniform. Therefore, the expansion part 39 is provided on the downstream side of the circulation part 38, and rectifies the steam flow which flows to the bending part 21, and prevents it from becoming a drift.

In addition, the superheated steam ejected from the second steam ejection port 29 is mainly used for adhering the grill color on the back surface of the upper layer to be heated 31 and heating and cooking the lower layer to be heated 31 during two-layer cooking. Therefore, in order to make the superheated steam from the second steam outlet 29 exhibit the above-mentioned two functions, a part of the superheated steam generation heater 23 is located in the enlarged part 39 of the circulation part 38, and the temperature of the superheated steam is prevented from falling in the enlarged part 39. . In addition, the first steam ejection port 28 may be provided in the enlarged portion 39 .

Here, the shape of the spacer plate 37 is set so that the distance between the narrowest part of the steam circulation area of the first duct part 20, that is, the distance H1 in the vertical direction of the narrow part 40 of the circulation part 38 is not smaller than the narrowest part of the curved part 21. The interval H2 of the narrow part. If the interval H1 is narrower than the interval H2, the circulation of the superheated steam in the first duct portion 20 will be deteriorated, which will have a bad effect especially during grill cooking.

As described above, in the present embodiment, by arranging the partition plate 37 having a concave portion in the middle of the steam flow direction in the first duct portion 20, the downstream side of the first duct portion 20 is approximately 3/4. Separated into upper and lower layers. In addition, the superheated steam generating heater 23 is arranged in the circulation part 38 of the lower layer, and the saturated water vapor from the circulation unit 14 is supplied to the circulation part 38, and on the other hand, the superheated steam generated in the circulation part 38 is supplied to the bending machine. Section 21.

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

In addition, an air heat insulating layer is formed on the outside of the circulation unit 38 . In addition, since the volume of the narrow portion 40 is small, there is no place where superheated steam can stagnate inside, so heat dissipation due to stagnant steam does not exist. Thereby, the inside of the circulation part 38 becomes a thermal insulation state, and internal temperature rises. Therefore, the temperature of the top plate 27 of the heating cooking chamber 13 rises, and the radiant heat toward the heating cooking chamber 13 can be increased.

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

As described above, the width in the vertical direction of the narrow portion 40 of the circulation portion 38 is extremely narrow. In addition, a superheated steam generating heater 23 is inserted into the narrow narrow portion 40 . At this time, if the superheated steam generating heater 23 is in contact with the partition plate 37 and the top plate 27 of the heating cooking chamber 13, the heat of the superheated steam generating heater 23 is absorbed by the contacting partition plate 37 and the top plate 27. Therefore, the superheated steam generating heater 23 needs to be disposed within the narrow narrow portion 40 so as not to contact the partition plate 37 and the top plate 27 .

In this embodiment, as shown in FIG. 5 and FIG. 6 , in the narrow portion 40 , the superheated steam generation heater 23 is fixed by the heater fixing angle iron 41 in the following manner so as not to contact the partition plate 37 and the top plate 27 . .

FIG. 7 is an enlarged view of the heater fixing angle 41 of FIG. 6 . The heater fixing angle 41 is formed by punching an elastic metal plate into a substantially rectangular shape, and then deforming it symmetrically as shown in FIG. 7 in the cross-sectional view in the longitudinal direction. That is, the heater fixing angle 41 has a flat mounting portion 42 , and the heater fixing angle 41 is fixed to the partition plate 37 at the middle portion in the longitudinal direction by riveting or the like. Also, on both sides of the mounting portion 42 are heater holding portions 43 provided with bent portions that are bent in the vertical direction and halfway in a semicircular shape to fit the superheated steam generation heater 23 . In addition, each heater holding portion 43 has a contact portion 44 formed of a surface parallel to the mounting portion 42 at the front end portion of each heater holding portion 43 and connected to the heating and cooking chamber that also functions as the lower surface of the first duct portion 20 . 13 of the top plate 27 contact. Furthermore, each contact portion 44 is formed with a protruding portion 45 that protrudes outward (on the top plate 27 side) and has a semicircular cross section.

And, when the mounting portion 42 of the above-mentioned heater fixing angle iron 41 is fixed on the spacer plate 37 by the rivet 46, the distance between the apex of the protruding portion 45 and the mounting portion 42 is formed to be larger than that between the top plate 27 and the spacer plate 37. slightly wider intervals. Therefore, when the spacer plate 37, which is fixed with the heater fixing angle iron 41, is installed on the first duct portion 20, and the above-mentioned first duct portion 20 is arranged on the top plate 27 of the heating cooking chamber 13, the spacer plate 37 and the spacer plate 37 are used. The top plate 27 exerts force on the mounting portion 42 and the contact portion 44 of the heater fixing angle iron 41 . As a result, the heater fixing angle 41 that holds the superheated steam generating heater 23 in the heater holding portion 43 is fixed between the top plate 27 and the partition plate 37 by the elastic force that overcomes the above-mentioned acting force, so that the superheated steam generating heater can be fixed. 23 is fixed apart from the top plate 27 and the spacer plate 37 .

In addition, the top plate 27 of the heating cooking chamber 13 is deformed to some extent due to the heat in the heating cooking chamber 13 and the like. In this case, since the contact portion 44 is deformed by elasticity, the superheated steam generation heater 23 is held between the top plate 27 and the partition plate 37 without being in contact with the top plate 27 .

In addition, the heater fixing angle 41 is formed bilaterally symmetrically as shown in FIG. 7 , and the directions of the two bent portions are the same. Therefore, as shown in FIG. 5 , two parts of one superheated steam generating heater 23 can be simultaneously fitted to different above-mentioned bent portions by a single operation, and good workability at the time of assembly can be realized.

Moreover, in order to absorb the heat of the circulation part 38 efficiently, the top plate 27 of the said heating cooking chamber 13 is painted black. On the other hand, the heater fixing angle 41 is formed by deforming a sheet of metal punched by a metal punching machine in a bilaterally symmetrical manner as shown in FIG. 7 . Therefore, a burr is generated on the contact surface with the top plate 27 on either of the two contact portions 44 . Therefore, burrs generated on the contact surface between the contact portion 44 and the top plate 27 cause the black paint applied to the top plate 27 to peel off and rust. Therefore, in this embodiment, the protrusion 45 is protrudingly formed outside the contact portion 44 (top plate 27 side), and the contact portion 44 contacts the top plate 27 with a smooth curved surface of the protrusion 45 . Therefore, the paint of the top plate 27 can be protected.

That is, in the present embodiment, the above-mentioned elastic attachment member within the scope of the above-mentioned claims is constituted by the above-mentioned heater fixing angle 41 .

In addition, as shown in FIGS. 5 and 6 , in the enlarged portion 39 of the circulation portion 38 , the superheated steam generation heater 23 is fixed by a heater fixing angle iron 47 so as not to contact the partition plate 37 and the top plate 27 . The heater fixing angle 47 is not symmetrically formed as shown in FIG. Besides, it is basically the same structure as the fixed angle iron 41 of the heater.

In addition, in this embodiment, the above-mentioned heater fixing angles 41 and 47 are attached to the partition plate 37 , but may be attached to the top plate 27 . However, from the viewpoint of protecting the black paint painted on the top plate 27, it is preferably mounted on the partition plate 37. In addition, it is also possible not to install the heater fixing angle irons 41, 47 on any one of the spacer plate 37 and the top plate 27, but to use the elastic force of the heater fixing angle irons 41, 47 on the spacer plate 37 and the top plate 27. to fix.

In addition, in this embodiment, the said 1st duct part 20 was attached to the ceiling surface of the heating cooking chamber 13, However, You may attach to the back surface of the heating cooking chamber 13, etc. as well. What is necessary is just to arrange|position along one surface of the heating cooking chamber 13, to heat the gas supplied from one side, and to discharge it from the other side opposite to the said one side.

In addition, in the present embodiment, the first pipe part 20 of the superheated steam generator 24 constitutes the heating pipe within the scope of the claims, and heats saturated steam as the heat medium to generate superheated steam. However, the present invention is not limited thereto, and may be applied to a heating cooker that heats air as the heat medium and heats and cooks an object to be heated with the generated hot air. That is, the above-mentioned heat medium may be any one of "steam", "superheated steam" and "air".

Claims (11)

1. a heating device, is characterized in that comprising:

Cooking chamber (13), for carrying out cooking to heating object (31);

End face thermal medium heating clamber (20), be positioned on the end face of described cooking chamber (13), there is the heater (23) that thermal medium is heated, and from be arranged on a plurality of ejiction openings (28) described end face to described cooking chamber (13) in the described thermal medium of ejection;

Circulating line circulates described thermal medium in described cooking chamber (13) and described end face thermal medium heating clamber (20); And

Fan (17), for making described thermal medium circulation, wherein,

Between the entrance and exit of described end face thermal medium heating clamber (20), be provided with spacing member (37), described spacing member (37) is separated Yi Cehe downstream, upstream one side of described thermal medium in the mode narrowing down,

A part for described heater (23) is positioned at than described spacing member (37) and relies on upstream one side.

2. heating device according to claim 1, is characterized in that, described spacing member (37) tilts in the mode that thermal medium is led oliquely downward.

3. heating device according to claim 1 and 2, characterized by further comprising narrow and form member, described narrow forms member and is connected with described spacing member (37), and form narrow (40), and a part for described heater (23) is configured in described narrow (40).

4. according to the heating device described in any one in claim 1-3, it is characterized in that, overlook while observing, be positioned at the occupied area of a part that relies on the described heater (23) of upstream one side than the centre between the described entrance of described end face thermal medium heating clamber (20) and described outlet and be greater than and be positioned at the occupied area of another part that relies on the described heater (23) of downstream one side than described centre.

5. according to the heating device described in any one in claim 1-4, it is characterized in that, a part for described heater (23) is positioned near upstream one side of heat medium flow of and the described end face thermal medium heating clamber (20) of described ejiction opening (28).

6. heating device according to claim 3, is characterized in that,

In the downstream of described narrow (40), a side has expansion section (39), and the aisle spare of narrow (40) is large described in the area ratio of combustion chamber passage of described expansion section (39), and,

A part for described heater (23) is positioned at described expansion section (39).

7. heating device according to claim 6, is characterized in that, ejiction opening described at least one (28) is positioned at described expansion section (39).

8. heating device according to claim 7, is characterized in that,

The position of the described ejiction opening (28) of described narrow (40), with respect to the position of the part of described heater (23), is positioned at downstream one side or the same position of the heat medium flow of described end face thermal medium heating clamber (20),

Overlook while observing, the occupied area of the described ejiction opening (28) in described narrow (40) is greater than the occupied area in described expansion section (39).

9. according to the heating device described in any one in claim 1-8, it is characterized in that, described end face thermal medium heating clamber (20) is steam to be carried out to superheated steam overheated and that become superheated steam generate chamber.

10. according to the heating device described in any one in claim 1-9, it is characterized in that, described heater (23) is had flexible elasticity installation component (41,47) clamping, and utilizes described elasticity installation component (41,47) with the upper surface with respect to described end face thermal medium heating clamber (20) and the gapped mode of lower surface tool, described heater (23) to be arranged in described end face thermal medium heating clamber (20).

11. heating devices according to claim 10, it is characterized in that, one end of described elasticity installation component (41,47) is arranged on described end face thermal medium heating clamber (20), and the other end of described elasticity installation component (41,47) is crooked convex surface, the convex surface of described bending is with the inner surface butt of revocable mode and described end face thermal medium heating clamber (20).

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