WO2006025133A1 - Dispositif de cuisson par chauffage - Google Patents

Dispositif de cuisson par chauffage Download PDF

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Publication number
WO2006025133A1
WO2006025133A1 PCT/JP2005/007023 JP2005007023W WO2006025133A1 WO 2006025133 A1 WO2006025133 A1 WO 2006025133A1 JP 2005007023 W JP2005007023 W JP 2005007023W WO 2006025133 A1 WO2006025133 A1 WO 2006025133A1
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WO
WIPO (PCT)
Prior art keywords
heating chamber
flow direction
heating
wind
air
Prior art date
Application number
PCT/JP2005/007023
Other languages
English (en)
Japanese (ja)
Inventor
Yukishige Shiraichi
Mitsuo Ohuchi
Rika Nozawa
Original Assignee
Sharp Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2004251752A external-priority patent/JP2006071124A/ja
Priority claimed from JP2004251753A external-priority patent/JP3863539B2/ja
Application filed by Sharp Kabushiki Kaisha filed Critical Sharp Kabushiki Kaisha
Priority to EP05728923A priority Critical patent/EP1793171A1/fr
Publication of WO2006025133A1 publication Critical patent/WO2006025133A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation

Definitions

  • the present invention generally relates to a cooking device, and more particularly to a cooking device capable of uniformly cooking food as a heated object.
  • a conventional cooking device such as a competition oven has a fan for forcibly circulating hot air in a heating chamber.
  • the hot air is circulated in the heating chamber by this fan, thereby speeding up cooking and equalizing the temperature distribution in the heating chamber and improving the baking performance.
  • the cooking device has an oven cooking function, an electromagnetic heating cooking function, a dielectric heating cooking function, a steam cooking function, or at least a plurality of cooking functions selected from these cooking functions.
  • FIG. 16 is a front view showing a conventional cooking device
  • Fig. 17 is a diagram showing the direction of air flow by a centrifugal fan in the blower
  • Fig. 18 is a mounting plate arranged on the upper stage of the conventional cooking device
  • Fig. 19 is a diagram showing the distribution of the heating state in the vicinity of the surface of Fig. 19, and Fig. 19 is a diagram showing the direction in which the air flows in the heating chamber of the conventional cooking device.
  • a conventional heating cooker 3 includes a box body 11 that has been subjected to heat insulation, and a heating chamber 12 that is provided in the box body 11 and cooks an object to be heated inside.
  • a heat insulating door 15 that opens and closes the front opening of the heating chamber 12, a heater 13 for generating hot air, a blower 20, an operation unit 16 for inputting instructions from the user, and heating And a control unit (not shown) for controlling the fan 13 and the blower 20.
  • the object to be heated is a single item to be cooked.
  • the heating chamber 12 has left and right side walls 31, a back wall 32, a top wall 33, and a bottom wall 34.
  • a blower 20 is provided behind the back wall 32.
  • Support portions 19 for supporting the mounting plates 40a and 40b so as to be attached and detached are formed on the upper and lower portions of the side wall 31.
  • the rear wall 32 is formed with a suction port 17 and air outlets 18a to 18d each formed by a plurality of holes. Suction port 17
  • the rear wall 32 is arranged in the center.
  • the air outlet includes a first air outlet 18a, a second air outlet 18b, a third air outlet 18c, and a fourth air outlet 18d.
  • the first air outlet 18a is disposed on the upper side of the upper stage tray 40a and is formed in a strip shape along the long side of the back wall 32.
  • the second air outlet 18b and the fourth air outlet 18d are respectively arranged in the vicinity of the left and right side walls 31 between the upper stage mounting tray 40a and the lower stage mounting tray 40b.
  • the second outlet 18b and the fourth outlet 18d are formed by arranging a plurality of holes in a small circular shape.
  • the third outlet 18c is disposed below the lower mounting tray 40b, and is formed in a strip shape along the long side of the back wall 32.
  • the blower 20 includes a centrifugal fan 22, a drive motor (not shown) that rotates the centrifugal fan 22 in the direction indicated by the arrow, and the centrifugal fan 22.
  • the fan casing 21 and force are also configured.
  • the suction port of the centrifugal fan 22 faces the suction port 17.
  • An annular heater 13 such as a sheathed heater is disposed around the centrifugal fan 22.
  • the fan casing 21 covers the back side of the back wall 32 and forms a space surrounding the centrifugal fan 22 and the heater 13.
  • D is a first corner located at the upper left in the fan casing 21 when viewed from the front
  • E is a second corner located at the upper right in the fan casing 21.
  • F indicates the third corner located at the lower right in the fan casing 21
  • G indicates the fourth corner located at the lower left in the fan casing 21.
  • the placing plate 40a on which the object to be heated is placed is placed in the heating chamber 12.
  • the control unit drives and controls the heater 13, the blower 20, and the like based on the instruction input from the operation unit 16, and starts heating cooking of the object to be heated.
  • the air blown out by the centrifugal fan 22 is heated by the heater 13 in the fan casing 21 and becomes hot air.
  • the hot air is blown out from the outlets 18a to 18d.
  • Air outlet 18a ⁇ Hot air blown out from 18d flows toward the front of the heating chamber 12, hits the door 15, changes its direction of flow, and concentrates in the center. 21 is inhaled.
  • the wind in the fan casing 21 is centrifugally rotated by rotation while being along the rotation direction (clockwise) of the centrifugal fan 22 as shown by the solid line arrow I in FIG. 17 and the broken line arrow I in FIG. Power Flows in a vortex shape toward the four corners D to G of the fan casing 21.
  • the wind is blown into the heating chamber 12 by the vortex-like wind flow.
  • the wind blown into the heating chamber 12 flows toward the door 15 along the side wall 31, the top wall 33 and the bottom wall 34.
  • the heat accumulates on the side wall 31 on the flow direction side along the rotational direction of the centrifugal fan 22, that is, on the downstream side in the flow direction, and the temperature distribution in the heating chamber 12 is not uniform.
  • the overheated portion spreads over the article S to be heated in the vicinity of the side wall 31 on the flow direction side.
  • the distribution of the heating state is the same on the lower side of the lower stage tray 40b.
  • the hot air blown into the heating chamber 12 from the air outlets 18a to 18d generates a flow along the rotation direction of the centrifugal fan 22 due to the influence of the flow of the vortex-like wind. That is, the wind blown from the outlet of the second corner E flows along the side wall 31 on the flow direction side by the swirl flow, so that the hot air flows in the flow direction in the upper stage tray 40a. Concentrate on side wall 31 side. As a result, the object to be heated contained in the heating chamber 12 is heated. Unevenness occurs.
  • Patent Document 1 in order to improve the heating unevenness in the rotating direction of the centrifugal fan, which is caused by the flow of the vortex-like wind unique to the centrifugal fan, There is disclosed a wind direction plate provided therein to regulate the flow of wind.
  • Patent Document 2 discloses that a high-frequency heating device, a control unit, and the like are installed below a heating chamber to expand the heating chamber volume particularly in the lateral width direction. Has been. As a result, the dimensions of the mounting plate can be increased in the width direction, so that the mounting location can be selected according to the heated object to be cooked, and uneven baking is eliminated.
  • the amount of air blown from the outlet of the first corner D and the outlet of the outlet provided at an intermediate position between the first corner D and the second corner E. Due to the difference between the air volume to be generated, a high heating part is generated in the central part of the heating chamber 12.
  • the hot air blown out from the centrifugal fan 22 is concentrated and compressed. For this reason, the wind blown out from the four corners D to G of the fan casing 21 is blown out faster than the blowout force blown out from the outlet force provided at the intermediate position between the four corners D to G.
  • the hot air blown out from the outlet of the first corner D is on the side wall 31 side opposite to the flow direction side in the upper stage tray 40a and on the back wall 32 side. It flows to the door 15 side without stopping.
  • a portion that is not heated or an insufficiently heated portion is generated in the portion on the back wall 32 side, and a highly heated portion is generated on the door 15 side of the upper tray 4 Oa.
  • Patent Document 3 Japanese Patent Laid-Open No. 63-14016
  • Patent Document 3 A cooking device is disclosed in which the heating temperature in the heating chamber is made uniform by changing the opening area of the air outlet in inverse proportion to the air volume.
  • Patent Document 4 Japanese Patent Application Laid-Open No. 2004-93092
  • a heater seeds heater
  • each heater end is led outward.
  • a cooking device is disclosed in which the heating temperature in the heating chamber is made uniform by adopting a shape in which at least a single burning portion is secured.
  • Patent Document 1 Japanese Patent Publication No. 7-111256
  • Patent Document 2 JP 2003-168551 A
  • Patent Document 3 Japanese Patent Laid-Open No. 63-14016
  • Patent Document 4 Japanese Unexamined Patent Application Publication No. 2004-93092
  • a wind direction plate is provided in the blower to improve the bias of the blown air due to the vortex-like wind flow unique to the centrifugal fan.
  • simply installing a wind direction plate cannot improve uneven heating in the door direction.
  • a device that blocks the original flow of the wind such as a wind direction plate
  • the resistance to the air flow increases, so the amount of air blown out from the air outlet also decreases.
  • the reach distance of the wind toward the door side in the heating chamber is shortened.
  • the heating to the to-be-heated object placed away from the outlet is weaker than the heated object to be heated placed near the outlet. Therefore, unless further consideration is given to the wind direction plate, there is still a problem that uneven heating occurs in the door side direction.
  • the amount of air blown out from the air outlet is adjusted using a part of the heater.
  • the shape of the heater is defined for the purpose of suppressing the uneven flow of the wind, this is preferable in terms of thermal efficiency. others Therefore, there is a risk of uneven heating depending on the shape of the heater.
  • one object of the present invention is to provide a heating cooker that can cook and uniformly heat the object to be heated.
  • Another object of the present invention is to provide a heating cooker that can cook an object to be heated without unevenness by causing the flow of wind in the heating chamber to be directed toward the door. .
  • Still another object of the present invention is to provide a heating cooker that can cook an object to be heated without unevenness so that the flow of air in the heating chamber is not biased.
  • a heating cooker includes a blower that sends out air in a predetermined flow direction, and a heating chamber that has a wall surface and accommodates an object to be heated.
  • the outlet for blowing out the wind sent from the blower is formed on the wall of the heating chamber.
  • a wind flow blocking wall that blocks the flow of wind is formed on the side of the flow direction with respect to the outlet.
  • the wind flow blocking wall that blocks the flow of the wind is positioned on the side of the flow direction with respect to the blower outlet, so that the wind hits the wind flow blocking wall from the blower outlet. Blown out. Since the wind blown out from the outlet does not accumulate on the wall on the flow direction side, the wind blown into the heating chamber spreads uniformly, and it is possible to prevent heating unevenness from occurring in the heated object. it can.
  • the wind flow blocking wall that blocks the flow of the wind is positioned on the flow direction side with respect to the blower outlet, and therefore on the side opposite to the flow direction.
  • the outlet force that is located The wind blows into the heating chamber, and the wind does not blow into the heating chamber from the flow direction side. For this reason, even if it reaches the wall surface on the flow direction side in the heating chamber by the wind flow from the wind blower blown from the direction opposite to the flow direction, the wind does not accumulate, so it blows into the heating chamber.
  • the wind that is spread spreads out uniformly, and it is possible to prevent uneven heating from occurring on the object to be heated.
  • the wind flow blocking wall is positioned at the flow direction side end portion of the blowout port, and the wind direction variable member that changes the flow of the blown air force is blown out. I prefer to include it.
  • the wind strikes the wind direction variable member, the flow direction changes, and the wind is blown out from the outlet. Outlet force The blown wind flows toward the front of the heating chamber, that is, toward the door. Therefore, since the wind does not collect on the wall surface on the flow direction side, the wind blown into the heating chamber spreads uniformly, and the heating unevenness of the heated object can be suppressed.
  • the blower outlet is formed in a range from the wall end of the heating chamber to the vicinity of the center of the wall on the side opposite to the flow direction. It is preferable that it is formed.
  • the outlet force located on the side opposite to the flow direction is blown into the heating chamber, and the wind is not blown into the heating chamber from the flow direction side. For this reason, even if the wind blown from the direction opposite to the flow direction reaches the wall surface on the flow direction side in the heating chamber due to the flow of the air from the blower, the wind does not accumulate. The air blown out to the air spreads uniformly, and heat does not concentrate on the wall in the flow direction inside the heating chamber. In addition, the flow direction of the wind blown out by the airflow direction change member is changed by the wind direction variable member, so that the wind spreads evenly to the door side of the heating cabinet. Therefore, the temperature distribution in the heating chamber can be made uniform.
  • the blower includes a centrifugal fan.
  • the centrifugal fan is preferably arranged so as to face the center of the wall surface of the heating chamber.
  • the variable air direction member is positioned within the range between two parallel straight lines that pass through the point on the most flow direction side and the point on the opposite direction side of the outer circumferential circle formed by the centrifugal fan. Is preferred.
  • the direction of the wind directed toward the flow direction is changed by the wind direction variable member, and the wind with a high wind speed can be blown into the outlet outlet heating chamber. Therefore, it is possible to increase the reach of the directional wind toward the door side of the heating chamber.
  • the air outlets are formed in an upper part, an intermediate part, and a lower part of the wall surface of the heating chamber. More preferably, the air outlets formed in the middle part of the wall surface of the heating chamber are arranged on both sides of the centrifugal fan.
  • the air direction variable member extends from the outer peripheral side of the wall surface of the heating chamber toward the center side in the vicinity of the edge of the wall surface of the heating chamber. It is preferred to be placed.
  • the air direction variable member is disposed to be inclined with respect to the flow direction.
  • the outer peripheral side end of the wall surface of the heating chamber in the air direction variable member is positioned on the flow direction side. It is preferable that the center side end of the wall surface of the heating chamber in the air direction variable member is positioned on the side opposite to the flow direction.
  • the wind direction varying member does not block the wind by directing the wind flow in the direction opposite to the flow direction. For this reason, extreme concentration of wind can be prevented at the flow direction side end of the outlet, and a part of the blown wind flows to the flow direction side. Therefore, it is possible to control the heating unevenness of an object to be heated without generating a low temperature portion on the flow direction side where a high temperature portion is not generated near the end portion in the flow direction of the outlet.
  • the wall surface of the heating chamber preferably includes a closed region where the air outlet is not formed and an air outlet region where the air outlet is formed.
  • the closed area includes an air flow blocking wall positioned on the flow direction side of the wall of the heating cabinet, and the blowout area includes an outlet port positioned on the opposite side of the flow direction on the wall of the heating chamber. Is preferred.
  • the outlet force on the opposite direction side can also blow the wind into the heating chamber, and the wind is not blown into the heating chamber from the flow direction side.
  • the wind blown out in the opposite direction reaches the wall surface on the flow direction side by the flow of the air from the blower, and the wind is evenly distributed in the horizontal direction of the heating chamber. Therefore, the heat in the heating chamber can be made uniform without heat accumulating on the wall surface on the flow direction side.
  • the blow-out area is arranged on the wall surface of the heating chamber so as to be biased toward the direction opposite to the flow direction.
  • the wall surface of the heating chamber includes a first region on the flow direction side and a second region on the opposite side to the flow direction, The blowing area preferably includes a part of the first area.
  • a plurality of mounting tables for placing an object to be heated are arranged in the vertical direction in the heating chamber, and the blowing region is arranged at the uppermost stage. It is preferable that the sensor is disposed at a position higher than the placed mounting table and at a position lower than the placing table placed at the lowermost stage.
  • the wind from the blower is not blown out from the flow direction side at a position higher than the placing tray arranged at the uppermost stage or at a position lower than the placing dish arranged at the lowermost stage. ,.
  • the opening area of the blowout region is formed so as to become smaller toward the side opposite to the flow direction. Is preferred.
  • the heating chamber has a rectangular wall surface, the height of the wall surface of the heating chamber is T, the width is W, and the aspect ratio is P.
  • T / W P is preferably 0.7 or less.
  • the edge inclined at the above-described inclination p is formed at the end portion on the opposite side of the blowing region, the wind is not blown out from the portion blown out the fastest. That is, the air is blown out from the outlet on the opposite side of the portion where the wind is blown out most quickly. Therefore, the wind from the outlet is blown out at substantially the same blowing speed at any of the opposite side end, the central portion, and the flow direction side end. For this reason, the reach distance of the wind is almost the same in the heating chamber, and the uniform wind can be sent into the heating chamber, so that it is possible to suppress the heating unevenness of the object to be heated.
  • the heating chamber has a rectangular wall surface, and the air outlet is formed along an edge of the rectangular horizontal direction forming the wall surface. I like it.
  • the food material to be heated can be cooked so that there is no uneven heating.
  • air is blown out from the air outlet according to the relationship between the position of the air outlet on the wall surface of the heating chamber and the air direction variable member provided on the flow direction side with respect to the position of the air outlet.
  • the wind speed can be secured so that the reach of the wind in the depth direction is sufficiently long, and the wind can be prevented from concentrating in the horizontal direction of the heating chamber.
  • the air outlet is provided on the side opposite to the flow direction. Therefore, no wind is blown into the heating chamber on the flow direction side, so that heat does not accumulate near the wall surface on the flow direction side. As a result, the wind blown from the air outlet provided on the wall surface is sent out evenly in the horizontal width direction and the depth direction in the heating chamber, and evenly hits the object to be heated on the mounting plate, Heat cooking without uneven heating can be performed.
  • FIG. 1 is a front view showing a heating cooker according to one embodiment of the present invention.
  • FIG. 2 is a side sectional view showing a cooking device according to one embodiment of the present invention.
  • FIG. 3 is a view showing a centrifugal fan viewed from the back wall side in the cooking device according to one embodiment of the present invention.
  • FIG. 4 is a view showing a back wall viewed from the fan casing side in the heating cooker according to one embodiment of the present invention.
  • FIG. 5 is a view showing the blowing direction of wind in the cooking device according to one embodiment of the present invention.
  • FIG. 6 is a diagram showing details of the blowout opening in the heating cooker according to one embodiment of the present invention.
  • FIG. 7 is a view showing a temperature distribution in the vicinity of the surface side of the upper tray at each position when the position of the first wind direction variable member is changed in the cooking device according to one embodiment of the present invention.
  • FIG. 9 is a front view showing a heating cooker according to another embodiment of the present invention.
  • FIG. 10 is a side sectional view showing a heating cooker according to another embodiment of the present invention.
  • FIG. 11 is a front view showing the flow direction of wind in a cooking device according to another embodiment of the present invention.
  • FIG. 12 is a diagram showing the distribution of the heating state in the vicinity of the surface side of the upper stage dish in the heating cooker according to another embodiment of the present invention.
  • FIG. 13 shows details of the air outlet in a heating cooker according to another embodiment of the present invention. It is a figure.
  • FIG. 14 Heating state in the vicinity of the surface side of the upper tray in each position when the position of the outlet end on the wind flow direction side is changed in the cooking device according to another embodiment of the present invention.
  • FIG. 16 is a front view showing a conventional cooking device.
  • FIG. 17 is a diagram showing the wind flow of a centrifugal fan in a conventional cooking device.
  • FIG. 18 is a diagram showing the distribution of the heating state in the vicinity of the surface side of the upper plate in the conventional cooking device.
  • FIG. 19 is a diagram showing the direction of air blowing in a conventional cooking device.
  • FIG. 1 is a front view showing a cooking device according to one embodiment of the present invention
  • FIG. 2 is a side sectional view showing the cooking device together with the direction of air flow (arrows)
  • FIG. 3 is seen from the back wall side.
  • FIG. 4 is a view showing a centrifugal fan
  • FIG. 4 is a view showing a back wall viewed from the fan casing side
  • FIG. 5 is a view showing a direction in which wind flows in the cooking device.
  • the heating cooker 1 of the present invention houses a box body 11 that is heat-insulated and has an open front surface, and an object to be heated S that is housed in the box body 11.
  • a heat insulating door 15 is provided on the front surface of the box 11 so as to be freely opened and closed, and an operation unit 16 for inputting instructions from the user is provided.
  • a control unit including a microcomputer controls the blower 30, the heater 13, and the like based on an instruction input from the operation unit 16.
  • the heating chamber 12 has two side walls 31, a back wall 32, a top wall 33, and a bottom wall 34.
  • the fan casing 21 of the blower 20 is attached to the back side of the back wall 32.
  • the left and right side walls 31 are formed with support portions 19 that support the mounting plates 40a and 40b so as to protrude vertically by two steps.
  • the mounting trays 40 a and 40 b are formed on the outer periphery of the mounting portion and the dish-shaped mounting portion having the same area as the horizontal section of the heating chamber 12 so that the article S to be heated can be placed. It consists of a flange-shaped edge.
  • the mounting trays 40a and 40b are accommodated in the heating chamber 12 by the edges of the mounting trays 40a and 40b being supported by the support unit 19.
  • the placing plate placed on the upper side is referred to as the upper placing plate 40a
  • the placing plate placed on the lower side is referred to as the lower placing plate 40b.
  • the blower 20 includes a centrifugal fan 22 and a motor 23 that rotationally drives the centrifugal fan 22 as indicated by arrows in FIGS.
  • the centrifugal fan 22 is supported by the fan casing 21 so as to rotate, and is disposed so as to face the back wall 32.
  • the rotational axis of the centrifugal fan 22 is positioned at the center of the back wall 3 2.
  • the heater 13 is arranged concentrically around the centrifugal fan 22.
  • the fan casing 21 has two side surfaces 21a, a back surface 21b, a top surface 21c, and a bottom surface 21d.
  • the rear wall 32 has a suction port 17 for sucking air in the heating chamber 12 into the fan casing 21, and outlets 18a to 18d for blowing hot air heated by the heater 13 into the heating chamber 12. Is formed.
  • the suction port 17 is disposed at the center of the back wall 32 and faces the suction port of the centrifugal fan 22.
  • the suction port 17 is arranged and formed in a circular shape by a plurality of holes.
  • the air outlets 18a to 18d are formed by collecting a plurality of holes having a diameter of about 5 mm.
  • the air outlets 18a to 18d are formed in a punch hole shape that is a collection of a plurality of holes. This prevents the leakage of electromagnetic waves to the outside of the heating chamber 12 when combined with electromagnetic heating, and also causes a cut or the like when a human inserts a fingertip into the hole when cleaning the heating chamber 12 The effect that it can prevent is obtained.
  • Air outlets 18a to 18d include an upper first air outlet 18a, an intermediate second air outlet 18b and a fourth air outlet 18d, and a lower third air outlet 18c. Consists of.
  • the first air outlet 18a is disposed above the upper stage mounting tray 40a, and is formed in a strip shape along the long side that is the horizontal edge of the back wall 32.
  • the second air outlet 18b is arranged in the middle of the upper mounting tray 40a and the lower mounting tray 40b and in the vicinity of the right side wall 31 when the heating chamber 12 is viewed from the front, and is formed in a small circular shape.
  • the third outlet 18c is disposed below the lower mounting tray 40b and is formed in a strip shape along the long side of the back wall 32.
  • the fourth outlet 18d is arranged in the middle of the upper mounting tray 40a and the lower mounting tray 40b and in the vicinity of the left side wall 31 when the heating chamber 12 is viewed from the front, and is formed in a small circular shape. Has been.
  • the second outlet 18b and the fourth outlet 18d are arranged symmetrically on both sides with the inlet 17 interposed therebetween.
  • the first air outlet 18a and the third air outlet 18c are formed in a substantially rectangular shape by a plurality of rows of holes arranged at equal intervals along the long side of the back wall 32.
  • the first outlet 18a is formed so that the opening area decreases toward the hot air flow direction side. That is, in the vicinity of the end on the flow direction side of the first outlet 18a, the number of punch holes arranged in order from two to one decreases from the form in which three punch holes are arranged in the vertical direction as it goes in the flow direction. Therefore, the opening area of the first outlet 18a is decreasing toward the flow direction side.
  • the edge on the flow direction side formed by arranging the punch holes is inclined along the flow direction.
  • a blower outlet is not formed on the flow direction side of the end edge on the flow direction side of the first blower outlet 18a formed by arranging the punch holes.
  • the flow direction side means the rotation direction side of the centrifugal fan 22 or the downstream side of the wind flow by the centrifugal fan 22, and the side opposite to the flow direction means the centrifugal fan 22.
  • This is the direction opposite to the direction of rotation or the upstream side of the wind flow by the centrifugal fan 22.
  • the flow direction side in the upper part of the heating chamber 12, for example, in the upper region of the upper stage tray 40a, the flow direction side is the right half side when the heating chamber 12 is viewed from the front, and the opposite direction side is the left half side.
  • the flow direction side corresponds to the left half side
  • the reverse direction side corresponds to the right half side.
  • the flow direction side is the lower half side when the heating chamber 12 is viewed from the front.
  • the flow direction side corresponds to the upper half side and the reverse direction side corresponds to the lower half side.
  • the end of the first air outlet 18a in the flow direction is the straight line in the height direction passing through the point on the outermost peripheral edge formed by the centrifugal fan 22 and the outermost peripheral edge formed by the centrifugal fan 22. It is located between the flow direction and a straight line in the height direction passing through the opposite point.
  • the reverse side end of the first outlet 18a is located in the vicinity of the side wall 31 on the reverse side.
  • the end in the flow direction side of the first outlet 18a is the height that passes through the point on the most flow direction side and the point on the most opposite direction side of the outer circumference circle formed by the centrifugal fan 22. Position within the range between two straight lines L in the direction.
  • the hot air does not concentrate on the flow direction side in the heating chamber 12 more than necessary to prevent the wind from being blown into the heating chamber 12 from the flow direction side, so that heat is generated near the side wall 31 on the flow direction side. There is no accumulation.
  • the third air outlet 18c is arranged at a position where the first air outlet 18a is rotated 180 degrees with the central axis of the centrifugal fan 22, that is, the center of the back wall 32, as the symmetry point. It is formed in the same shape as In addition, the flow direction side end of the third outlet 18c is a straight line in the height direction passing through a point on the most flow direction side of the outer peripheral edge formed by the centrifugal fan 22 and the outermost peripheral edge formed by the centrifugal fan 22. It is located between the flow direction and a straight line in the height direction passing through the opposite point. As shown in Fig.
  • the reverse side end of the third outlet 18c is located near the side wall 31 on the reverse side.
  • wind direction variable members 50a to 50d that change the direction of the wind flow are provided.
  • Each of the wind direction variable members 50 a to 50 d is disposed on the back side of the back wall 32, that is, in the fan casing 21.
  • the wind direction variable members are the first wind direction variable member 50a, the second wind direction variable member 50b, the third wind direction variable member 50c, and the fourth wind direction variable member. It is composed of 50d.
  • Each of the wind direction variable members 50a to 50d is formed by bending a metal plate or the like into an L shape at a right angle.
  • the air-direction variable members 50a to 50d are fixed by the pressure-bonding portions 51 of the air-direction variable members 50a to 50d being bonded to the back wall 32 by an adhesive, welding or the like.
  • the guide surfaces 52 of the wind direction varying members 50a to 50d that are exposed to hot air are positioned so as to be substantially perpendicular to the back wall 32.
  • the arrows shown in Fig. 4 indicate the direction of rotation of the centrifugal fan.
  • the first air direction variable member 50a is provided along a hypotenuse connecting the uppermost vertex and the lowermost vertex of the flow direction side end of the first air outlet 18a.
  • the upper side of the first air direction variable member 50a is close to the top surface 21c in the fan casing 21, and the back side of the first air direction variable member 50a is close to the back surface 21b in the fan casing 21.
  • the first wind direction varying member 50a is inclined with respect to the wind flow direction.
  • the first wind direction variable member 50a is positioned so that the end (outer end) on the top surface 21c side of the first wind direction variable member 50a is located on the flow direction side and the center side end is located on the opposite direction side. is set up.
  • the second air direction varying member 50b is provided at the end of the second outlet 18b in the flow direction.
  • the second air direction variable member 50 b is positioned substantially parallel to the long side of the wall surface of the heating chamber 12 and substantially perpendicular to the short side of the wall surface of the heating chamber 12.
  • the second air direction variable member 50b is close to the side surface 21a in the fan casing 21 and close to the back surface 21b in the fan casing 21.
  • the width of the second air direction variable member 50b is formed to be wider than the width of the second outlet 18b.
  • the fourth wind direction variable member 50d has the same shape as the second wind direction variable member 50b, and is arranged point-symmetrically with respect to the second wind direction variable member 50b across the center of the centrifugal fan 22.
  • the third wind direction varying member 50c is provided along the oblique side connecting the uppermost vertex and the lowermost vertex of the flow direction side end of the third outlet 18c.
  • the lower side of the third wind direction variable member 50c is close to the bottom surface 21d in the fan casing 21, and the back side of the third wind direction variable member 50c is close to the back surface 21b in the fan casing 21.
  • hot air flowing in the circumferential direction is formed by the centrifugal fan 22.
  • the hot air flowing through the fan casing 21 as indicated by the broken arrow B is heated from the outlets 18a to 18d as indicated by the solid arrow A in FIG. It is blown out in the cabinet 12.
  • the hot air passes through the surface and the bottom surface of the mounting trays 40a and 40b.
  • a solid arrow A indicates the flow of hot air in the heating chamber 12
  • a broken arrow B indicates the flow of hot air in the blower 20.
  • Hot air flowing through the second corner E of the fan casing 21 is blocked by the first air direction varying member 50a formed at the flow direction side end of the first outlet 18a.
  • the hot air hitting the first air direction variable member 50a receives the force of the flow component in the circumferential direction by the centrifugal fan 22, and is directed toward the flow direction side from the first outlet 18a in the heating chamber 12. It blows out diagonally forward.
  • the hot air blown from the flow direction end of the first outlet 18a has a higher wind speed than the case where there is no wind direction variable member. This hot air flows toward the door 15 side of the heating chamber 12.
  • the hot air blown from the first air outlet 18a does not concentrate on the flow direction side on the upper stage tray 40a. ,. Therefore, the hot air blown into the heating chamber 12 where the air does not accumulate on the side wall 31 on the flow direction side is spread uniformly, and uneven heating of the article S to be heated can be suppressed.
  • first wind direction variable member 50a is inclined with respect to the flow direction of the wind, the flow cannot be stopped by directing the flow of hot air in the opposite direction. For this reason, extreme hot air concentration does not occur at the end of the first outlet 18a in the flow direction. To some extent, hot air can be sent to the flow direction side. End force on the flow direction side of the first outlet 18a The blown hot air flows also toward the flow direction side, and a directional flow is also generated on the side wall 31 side along the back wall 32. It is possible to suppress uneven heating of the object to be heated without generating a high temperature portion near the flow direction side end of the first outlet 18a and without generating a low temperature portion on the flow direction side. .
  • the first air direction variable member 50a is provided so as to be close to the top surface 21c and the back surface 21b in the fan casing 21.
  • the hot air is directed toward the outer periphery of the fan casing 21 by the centrifugal fan 22, but the hot air can be efficiently collected and guided into the heating chamber 12 due to the presence of the first air direction variable member 50 a.
  • the first wind direction varying member 50a is in close contact with the back wall 32, the hot air leaking from between the first wind direction varying member 50a and the back wall 32 is not. Therefore, hot air can be collected without waste, so the hot air blown from the first air outlet 18 The amount can be increased as much as possible.
  • the directional hot air is blocked at the third corner F by the second wind direction variable member 50b.
  • the hot air hitting the second air direction variable member 50b is changed in the direction of flow at a substantially right angle, and blown out from the second air outlet 18b toward the door 15 side. For this reason, hot air with a high wind speed is obtained compared with the case where there is no wind direction variable member, and it reaches near the door 15 side.
  • the hot air then flows toward the inlet 17 and circulates.
  • the flow of the hot air is the same for the hot air blown from the fourth outlet 18d. Therefore, sufficient hot air can be secured in the intermediate portion sandwiched between the upper and lower mounting plates 40a and 40b in the heating chamber, and the force S can be made uniform in temperature distribution.
  • FIG. 6 is a diagram showing details of the air outlet
  • FIG. 7 is a diagram showing the temperature distribution near the surface side of the upper mounting plate at each position when the position of the first air direction variable member 50a is changed.
  • E3 is a position on a straight line in the height direction passing through the rotation axis of the centrifugal fan 22, that is, a position on a bisector dividing the back wall 32 into two equal parts, and E6 is a flow direction side.
  • E5 is an intermediate position between E3 and E6, E1 is in the opposite side wall 31 and E3 E2 is the middle position between El and E3, and E4 is the middle position between E3 and E5.
  • the flow direction in the heating chamber 12 Both the hot air flow into the side and the effect of blowing the hot air by the action of the first wind direction variable member 50a can be obtained appropriately. That is, a suitable temperature distribution can be obtained as a whole in the heating chamber 12.
  • the width of the heating chamber 12 is set on the door 15 side in the heating chamber 12 as shown in FIGS. 7 (b) and 7 (d). There is a slight deviation of hot air in the direction and uneven temperature distribution.
  • the position of the first air direction variable member 50a is E3
  • the straight line in the height direction passing through the point on the outermost peripheral edge formed by the centrifugal fan 22 and the most flow direction side, and the centrifugal fan 22 The position between the outer peripheral edge to be formed and the straight line in the height direction passing through the point on the opposite side, that is, as shown in FIG. 6, the most flowing direction of the outer circumferential circle formed by the centrifugal fan 22 More preferably, it is located within a range between two straight lines L in the height direction passing through the point on the side and the point on the most opposite direction. This makes the temperature distribution in the heating chamber 12 more preferable and uniform. You can.
  • the above-described embodiment exhibits the above-described effects without being particularly adversely affected by the dimensional ratio of the height and width of the heating chamber 12.
  • T the length in the height direction of the heating chamber 12
  • W the length in the width direction
  • P TZW.
  • the width increases.
  • the heating cooker of this embodiment exhibits the effect which relieve
  • P ⁇ 0.7 that is, in the heating cooker in which the horizontal width direction of the heating chamber 12 is flat, the heating cooker of this embodiment can exhibit a more remarkable effect.
  • FIG. 9 is a front view showing a heating cooker according to another embodiment of the present invention
  • FIG. 10 is a direction in which wind flows (arrow).
  • FIG. 11 is a side sectional view showing the cooking device
  • FIG. 11 is a diagram showing the direction of air flow in the cooking device
  • FIG. 12 is a diagram showing the distribution of the heating state near the surface side of the upper plate.
  • the description about the structure of the heating cooker 2 which concerns on another embodiment of this invention is the structure similar to the heating cooker 1 which concerns on one embodiment of this invention shown by FIGS. 1-5. This is omitted, and only the different configurations are described below.
  • the arrow shown in FIG. 9 indicates the direction of rotation of the centrifugal fan 22.
  • Each of the first air outlet 18a and the third air outlet 18c is formed by arranging a plurality of holes arranged at equal intervals along the long side of the back wall 32 and arranged in a substantially rectangular shape.
  • the area formed in the rectangular shape is called a blowing area, and the area where no hole is formed on the flow direction side from the blowing area is called a closed area. That is, the closed region includes the air flow blocking wall that is positioned on the flow direction side of the wall surface of the heating chamber 12 and has no holes, and the blowout region is the direction opposite to the flow direction on the wall surface of the heating chamber 12.
  • the air outlet is located on the side of the.
  • the flow direction side means the rotation direction side of the centrifugal fan 22 or the downstream side of the wind flow by the centrifugal fan 22, and the direction opposite to the flow direction means the centrifugal fan 22.
  • This is the direction opposite to the direction of rotation or the upstream side of the wind flow by the centrifugal fan 22.
  • the flow direction side in the upper part of the heating chamber 12, for example, in the region above the upper stage tray 40a, corresponds to the right half side when the heating chamber 12 is viewed from the front, and the opposite direction side corresponds to the left half side.
  • the flow direction side corresponds to the left half side
  • the reverse direction side corresponds to the right half side
  • the flow direction side on the right side of the centrifugal fan 22 is the lower half when the heating chamber 12 is viewed from the front.
  • the reverse direction side corresponds to the upper half side
  • the flow direction side corresponds to the upper half side
  • the reverse direction side corresponds to the lower half side.
  • the first outlet 18a is formed so that the opening area becomes narrower in the opposite direction.
  • the punch holes are arranged in the vertical direction from the form in which the three punch holes are arranged in the vertical direction, and then in order, two and one in sequence. Since the number has decreased, the first blowout toward the direction opposite to the flow direction The opening area of the mouth 18a has decreased.
  • the edge on the side opposite to the flow direction formed by arranging the punch holes is inclined along the flow direction.
  • a closed area of a triangular shape for example, a right triangular shape, above the hypotenuse that connects the uppermost punch hole and the lowermost punch hole. Is formed. There are air outlets in this triangular closed area.
  • the flow direction side end of the first outlet 18a divides the back wall 32 into two equal parts into a region on the flow direction side and a region on the reverse direction side.
  • the line is positioned within the range that includes a part of the area on the flow direction side beyond the bisector. Specifically, the end in the flow direction side of the first outlet 18a does not exceed the straight line L in the height direction passing through the point in the flow direction of the outer circumferential circle formed by the centrifugal fan 22, and the second wall 32, etc.
  • air is not blown into the heating chamber 12 from the flow direction side, and hot air is not concentrated more than necessary on the flow direction side in the heating chamber 12, so that it is not on the flow direction side. Heat does not accumulate near the side wall 31.
  • the second air outlet 18b and the fourth air outlet 18d are formed in a small circular shape with a plurality of holes gathered on both the left and right sides with the suction port 17 in between.
  • the third air outlet 18c is arranged at a position where the first air outlet 18a is rotated 180 degrees with the central axis of the centrifugal fan 22 as a symmetry point, that is, with the center of the back wall 32 as the symmetry point. .
  • the shape of the third outlet 18c is the same as that of the first outlet 18a.
  • the reverse direction end of the third outlet 18c is formed so that the opening area becomes narrower in the reverse direction.
  • the opening area of the first outlet 18a decreases toward the opposite side to the flow direction.
  • the edge on the side opposite to the flow direction formed by arranging the punch holes is inclined along the flow direction.
  • a closed region of a triangular shape for example, a right triangle shape, is formed below the hypotenuse that connects the uppermost punch hole and the lowermost punch hole at the end opposite to the flow direction of the third outlet 18c. Has been. There is no air outlet in this triangular closed area. As shown in FIG.
  • the flow direction side end of the third outlet 18c does not exceed the straight line L in the height direction passing through the point on the flow direction side of the outer circumferential circle formed by the centrifugal fan 22, and the rear wall Located on the flow direction side of 32 bisectors.
  • the hot air blown out by the centrifugal fan 22 flows into the heating chamber 12 as indicated by the solid line arrow A in FIG. Even when the placing plates 40a and 40b are placed on the upper or lower stage, the hot air passes through the surface and the bottom surface of the placing plates 40a and 40b.
  • a solid line arrow A indicates the flow of hot air in the heating chamber 12
  • a broken line arrow B indicates the flow of hot air in the blower 20.
  • the compressed air is concentrated and compressed in the first corner D of the fan casing 21 by the flow of the vortex-like hot air.
  • the hot air is not blown from the portion blown out fastest by the triangular closed region. That is, the hot air is blown out from the first blower outlet 18a on the opposite side of the portion where the hot air is blown out most quickly. Therefore, the hot air from the first outlet 18a has almost the same blowing speed at the end on the reverse side, the center, and the end on the flow direction. It is blown out by the degree. For this reason, the reach distance of hot air is equal in the heating chamber 12, and uniform hot air can be sent into the heating chamber 12.
  • an unnatural high heating portion as shown in FIG. 18, which is a conventional example, does not occur in the upper stage tray 40a. That is, an unnatural high heating portion extending in an oblique direction from the left front side of the upper tray 40a does not occur.
  • the position of the end in the flow direction side of the first outlet 18a is 2 with respect to the bisector that divides the back wall 32 into the flow direction side region and the reverse direction region. It is located in a range that includes a part of the flow direction side beyond the bisector. That is, the position of the end in the flow direction on the first outlet 18a is a position away from the end in the flow direction on the back wall 32.
  • the closed area includes an airflow blocking wall that is positioned on the flow direction side of the back wall 32 of the heating chamber 12 and is not formed with a hole, and the blowout area is connected to the flow direction of the back wall 32 of the heating chamber 12. Includes outlets located on the opposite side.
  • the hot air blown from the first blower outlet 18a is directed to the flow direction side by the swirl-like flow by the centrifugal fan 22, it causes insufficient heating in the right side portion of the upper mounting plate 40a. That's true. For this reason, as shown in FIG. 12, the high heating portion is generated in the central portion of the upper stage tray 40a, and further, the heating state is distributed so that the optimum heating portion spreads out as a whole. The distribution of the heating state due to the flow of the hot air is the same for the hot air blown from the third outlet 18c on the bottom surface side of the lower mounting tray 40b.
  • FIG. 13 is a detailed view showing the air outlet
  • Fig. 14 is an object to be heated S placed on the surface of the upper mounting tray for each position when the position of the end of the first air outlet 18a in the flow direction is changed.
  • FIG. 5 is a diagram showing the distribution of the heating state of the surface of the first air outlet 18 a in the flow direction when the upper and lower two placing dishes are accommodated in the heating chamber and hot air is blown from all the air outlets. The result at the time of changing the position of a side edge part is shown.
  • the arrows shown in FIG. 13 indicate the direction of rotation of the centrifugal fan 22.
  • E1 in FIG. 13 indicates a position on a straight line in the height direction passing through the rotation axis of the centrifugal fan 22, that is, a position on a bisector dividing the back wall 32 into two equal parts, and E5 Indicates the position near the side wall 31 on the flow direction side.
  • E2, E3, and E4 indicate the positions on the lines of the equal lines that divide E1 and E5 into four equal parts.
  • the flow direction side end of the first outlet 18a does not exceed the straight line L in the height direction passing through the point on the most flow direction side of the outer circumference formed by the centrifugal fan 22, and More preferably, it is on the flow direction side of the bisector of the wall 32.
  • the edge on the side opposite to the flow direction formed by arranging the punch holes is inclined along the flow direction. Yes.
  • a closed region of a triangular shape for example, a right triangle shape, is formed above the hypotenuse that connects the uppermost punch hole and the lowermost punch hole at the end of the first air outlet 18a opposite to the flow direction.
  • Appropriate heating can be performed in the heating chamber 12 by setting the slope of the hypotenuse connecting the uppermost vertex and the lowermost vertex of the right triangle as follows. At this time, as shown in FIG.
  • the length in the height direction of the heating chamber 12 is T
  • the length in the width direction is W
  • the length of the hypotenuse of the right triangle is t
  • the length of the hypotenuse is w
  • the distribution of the heating state that is, the distribution of the heating state in the vicinity of the surface side of the upper stage tray 40a will be described with reference to FIG. Fig.
  • the hot air that has not been blown out flows to the flow direction side and is blown out from the flow direction side of the outlet. High Ability to obtain an appropriate distribution of the heating state in which the heated part does not become too biased toward the left front side of the upper stage tray 40a.
  • a blower including a fan casing, a heater, and a centrifugal fan may be provided in the heating chamber.
  • the wall surface of the fan casing constitutes a part of the wall surface of the heating chamber.
  • the outlet is formed on the wall surface of the heating chamber, that is, the wall surface of the fan casing.
  • the outlet is not limited to the punch hole shape.
  • you may provide a blower outlet in a side wall instead of providing a blower outlet in a back wall.
  • the position of the outlet differs according to the direction of the wind.
  • the wind direction variable member may be formed to be spherically curved.
  • the position of the centrifugal fan is not particularly limited to the center of the back wall. Using hot air passages such as pipes and tubes, the hot air from the centrifugal fan may be guided to the outlet.
  • the present invention provides an oven cooking function, an electromagnetic heating cooking function, a dielectric heating cooking function, a steam cooking function, or various cooking functions having at least a plurality of cooking functions selected from these cooking functions. It can be applied to a cooking device.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
  • Electric Ovens (AREA)

Abstract

L'invention concerne un dispositif de cuisson par chauffage (1, 2) pouvant cuire uniformément par chauffage un matériau chauffé sans irrégularité. Le dispositif de cuisson par chauffage (1, 2) comprend un dispositif soufflant (20) qui souffle de l'air dans une direction spécifiée de circulation et une chambre de chauffage (12) comportant une surface de paroi (32) et stockant le matériau chauffé (S). Des trous de soufflage (18a, 18b, 18c, 18d) soufflant l'air amené depuis le dispositif soufflant (20) sont formés dans les surfaces des parois (32) de la chambre de chauffage (12). Des parois de protection de la circulation d'air, protégeant la circulation de l'air, sont formées au niveau des trous de soufflage (18a, 18b, 18c, 18d) sur les cotés de la direction de la circulation. Les parois de protection de la circulation d'air comprennent des éléments de modification de la direction de l'air (50a, 50b, 50c, 50d) positionnés au niveau de pièces d'extrémité du côté de la direction de la circulation des trous de soufflage (18a, 18b, 18c, 18d) qui modifient la direction de circulation de l'air soufflé à partir des trous de soufflage (18a, 18b, 18c, 18d).
PCT/JP2005/007023 2004-08-31 2005-04-11 Dispositif de cuisson par chauffage WO2006025133A1 (fr)

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JP2004251752A JP2006071124A (ja) 2004-08-31 2004-08-31 加熱調理器
JP2004-251752 2004-08-31
JP2004-251753 2004-08-31
JP2004251753A JP3863539B2 (ja) 2004-08-31 2004-08-31 加熱調理器

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CN109338078A (zh) * 2018-11-01 2019-02-15 张家港嘉园钢铁制品有限公司 一种用于钢管的高能效光亮退火炉

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DE102007061286A1 (de) 2007-12-19 2009-06-25 BSH Bosch und Siemens Hausgeräte GmbH Gargerätegebläsevorrichtungseinheit
EP2235446B1 (fr) * 2007-12-12 2018-01-10 BSH Hausgeräte GmbH Appareil de cuisson
DE102007061302A1 (de) * 2007-12-19 2009-06-25 BSH Bosch und Siemens Hausgeräte GmbH Heißluft- oder Umluftofen
EP1970635B1 (fr) * 2008-06-26 2012-03-21 V-Zug AG Four à air chaud doté de déflecteurs
DE102009026645B4 (de) * 2009-06-02 2015-03-12 BSH Bosch und Siemens Hausgeräte GmbH Gargerät
DE102009045787A1 (de) * 2009-10-19 2011-05-12 BSH Bosch und Siemens Hausgeräte GmbH Gargerätefiltereinheit
TW201144722A (en) * 2010-01-18 2011-12-16 Panasonic Corp Heating apparatus
ES2405406B1 (es) * 2010-12-16 2014-05-13 BSH Electrodomésticos España S.A. Mufla para un aparato de cocción, aparato de cocción con una mufla correspondiente, y procedimiento para ejecutar un funcionamiento de pirólisis de un aparato de cocción
US10085592B1 (en) 2015-09-10 2018-10-02 Brava Home, Inc. Sequential broiling
US10064244B2 (en) 2015-09-10 2018-08-28 Brava Home, Inc. Variable peak wavelength cooking instrument with support tray
US11156366B2 (en) 2015-09-10 2021-10-26 Brava Home, Inc. Dynamic heat adjustment of a spectral power distribution configurable cooking instrument
US11388788B2 (en) 2015-09-10 2022-07-12 Brava Home, Inc. In-oven camera and computer vision systems and methods
US10760794B2 (en) * 2015-09-10 2020-09-01 Brava Home, Inc. In-oven camera
WO2018026846A1 (fr) * 2016-08-02 2018-02-08 Brava Home, Inc. Instrument de cuisson à longueur d'onde de crête variable avec plateau de support
CN108245038B (zh) * 2016-12-28 2021-03-19 浙江绍兴苏泊尔生活电器有限公司 上盖组件及具有其的空气炸锅
US10223933B1 (en) 2017-08-09 2019-03-05 Brava Home, Inc. Multizone cooking utilizing a spectral-configurable cooking instrument
WO2019033089A1 (fr) 2017-08-11 2019-02-14 Brava Home, Inc. Systèmes et procédés de cuisson configurables
US11206949B1 (en) 2017-11-15 2021-12-28 Brava Home, Inc. High power density toaster
US11422037B2 (en) 2018-03-15 2022-08-23 Brava Home, Inc. Temperature probe systems and methods
US10502430B1 (en) 2018-10-10 2019-12-10 Brava Home, Inc. Particulates detection in a cooking instrument

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WO2008148675A3 (fr) * 2007-06-05 2009-11-05 BSH Bosch und Siemens Hausgeräte GmbH Four
CN109338078A (zh) * 2018-11-01 2019-02-15 张家港嘉园钢铁制品有限公司 一种用于钢管的高能效光亮退火炉

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