JP2013064576A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker of further low cost by manufacturing a steam generater by a sheet-metal processed product.SOLUTION: This heating cooker 1 includes a cooking chamber 2 defining a heating chamber 2b receiving a heated object O, and the steam generater 31 supplying steam into the heating chamber 2b to heat the heated object O. The steam generater 31 includes a cast box-shaped container 38 having a water supply opening 36 for introducing water and a recessed section 37 connected with the water supply opening 36, a steam heater 35 disposed in the container 38 and heating the water to generate steam, and a sheet-metal container cover 41 having a jetting port 39 for introducing the steam generated in the recessed section 37 to the heating chamber 2b, and closing the recessed section 37 of the container 38.

Description

  Embodiments according to the present invention relate to a cooking device.

  There is a cooking device that cooks an object to be heated using steam. This heating cooker includes a steam generator that generates steam.

  The steam generator includes a container having a recess that partitions a space for storing water, a container lid that closes the recess, and a heater that is provided in the container and generates water by heating water. The container and the container lid are die-cast aluminum.

JP 2011-76124 A

  In the conventional heating cooker, the container and the container lid of the steam generator are molded by aluminum die casting, so that the mold used for each molding and the maintenance of the mold are required, and corresponding costs are required.

  On the other hand, if the steam generator can be manufactured with a sheet metal processed product that is cheaper than die casting, the cost of the steam generator can be reduced, and the cost of the cooking device can be reduced.

  However, it is difficult to simply replace a container and a container lid, which have been conventionally formed by die casting, with a sheet metal product.

  Then, an object of this invention is to manufacture a steam generator with a sheet metal processed goods, and to provide a low-cost heating cooker.

  In order to solve the above-described problems, a cooking device according to an embodiment of the present invention includes a cooking chamber that partitions a heating chamber that houses an object to be heated, and steam that supplies the steam to the heating chamber to heat the object to be heated. The steam generator is a casting-made box-shaped container having a water supply port for introducing water and a recess connected to the water supply port, and is provided in the container to heat the water and A heater that generates steam, and a sheet metal container lid that has a spout for guiding the steam generated in the recess to the heating chamber and closes the recess of the container.

The front view which shows the heating cooker which concerns on embodiment of this invention. The longitudinal cross-sectional view which shows the heating cooker which concerns on embodiment of this invention. The cross-sectional view which shows the heating cooker which concerns on embodiment of this invention. The partial cross-sectional view which shows the steam generator of the heating cooker which concerns on embodiment of this invention. The partial cross-sectional view which shows the other example of the steam generator of the heating cooker which concerns on embodiment of this invention. The partial cross-sectional view which shows the other example of the steam generator of the heating cooker which concerns on embodiment of this invention. The partial cross-sectional view which shows the other example of the steam generator of the heating cooker which concerns on embodiment of this invention. The partial cross-sectional view which shows the other example of the steam generator of the heating cooker which concerns on embodiment of this invention.

  Hereinafter, embodiments of a heating cooker according to the present invention will be described with reference to FIGS. 1 to 8.

  FIG. 1 is a front view showing a heating cooker according to an embodiment of the present invention.

  The heating cooker 1 according to the present embodiment has both functions of a microwave oven and an oven. As shown in FIG. 1, the heating cooker 1 can open and close a rectangular box-shaped cooking chamber 2 that partitions a heating chamber 2 b into and from which an object to be heated O can be put in and out from an opening 2 a on the front surface, and an opening 2 a of the cooking chamber 2. The door 3 is provided.

  The cooking chamber 2 includes a rectangular box-shaped inner box 5 that partitions the heating chamber 2 b and an outer box 7 that surrounds the inner box 5.

  The inner box 5 is sandwiched between an upper hot air outlet 8 and a lower hot air outlet 9 and a central portion of the upper hot air outlet 8 and the lower hot air outlet 9 in which a plurality of small openings are divided into two upper and lower lines and arranged in the width direction. The back surface 5a has a suction port 11 in which a plurality of small openings are arranged in a circle. Further, the inner box 5 has an excitation opening 12 on the left side surface 5b in which a plurality of small openings are arranged in a rectangle. Further, the inner box 5 has a steam outlet 13 on the right side surface 5c in which a plurality of small openings are arranged horizontally.

  The inner box 5 is provided with an internal temperature sensor 15 that is fixed to the right side surface 5c and measures the temperature in the heating chamber 2b. The internal temperature sensor 15 is a thermistor, for example.

  The door 3 is rotatable around a horizontal rotation axis located at the lower front end of the cooking chamber 2, and rotates around the rotation axis to contact the front surface of the cooking chamber 2 to close the heating chamber 2 b, When it rotates around this rotation axis and falls almost horizontally, the opening 2a is fully opened.

  FIG. 2 is a longitudinal cross-sectional view showing the heating cooker according to the embodiment of the present invention.

  As shown in FIG. 2, the cooking chamber 2 of the heating cooker 1 according to the present embodiment has a gap 17 that separates the inner box 5 and the outer box 7. The heating cooker 1 includes an oven cooking mechanism 20 that is located in a gap 17a between the back surface 5a of the inner box 5 and the back surface 7a of the outer box 7 and that can heat the object to be heated O in the heating chamber 2b with hot air.

  The oven cooking mechanism 20 includes a fan device 21 located behind the suction port 11, a plurality of heaters 22 and 23 that face the upper hot air discharge port 8 and the lower hot air discharge port 9, and a casing 24.

  The fan device 21 includes a fan motor 25 that is fixed to the back surface of the casing 24, and a centrifugal fan 26 that is positioned inside the casing 24 and faces the suction port 11 and is fixed to the rotation shaft of the fan motor 25.

  The heaters 22 and 23 include upper side portions 22 a and 23 a located behind the upper hot air discharge port 8, and lower side portions 22 b and 23 b located behind the lower hot air discharge port 9, and the periphery of the fan device 21 is annular. Surround with.

  The casing 24 accommodates the centrifugal fan 26 and the heaters 22 and 23 of the fan device 21, and the hot air is heated behind the upper hot air outlet 8, the lower hot air outlet 9, and the inlet 11 on the back surface 5 a of the inner box 5. Divide the road.

  The oven cooking mechanism 20 drives the fan device 21 to suck the air in the heating chamber 2b into the casing 24 from the suction port 11, and the air heated by the centrifugal fans 26 to the surroundings is heated by the heaters 22 and 23. The heated object O in the heating chamber 2b is heated with hot air by discharging into the heating chamber 2b from the upper hot air discharge port 8 and the lower hot air discharge port 9.

  FIG. 3 is a cross-sectional view showing the heating cooker according to the embodiment of the present invention.

  As shown in FIG. 3, the heating cooker 1 according to the present embodiment is located in a gap 17 d between the bottom surface 5 d of the inner box 5 and the bottom surface 7 d of the outer box 7, and is microscopically placed on the object to be heated O in the heating chamber 2 b. A magnetron 27 capable of irradiating waves is provided. The microwave irradiated by the magnetron 27 is guided to the excitation port 12 on the left side surface 5b of the inner box 5 by the waveguide 28 extending in the gap 17b between the left side surface 5b of the inner box 5 and the left side surface 7b of the outer box 7. The object to be heated O spreads from the excitation port 12 into the heating chamber 2b.

  Moreover, the heating cooker 1 according to this embodiment includes a steam cooking mechanism 29 that can heat the object to be heated O in the heating chamber 2b with steam.

  The steam cooking mechanism 29 includes a gap 17d between the bottom surface 5d of the inner box 5 and the bottom surface 7d of the outer box 7 and a tank 30 that extends downward to store water, a right side surface 5c of the inner box 5, and a right side of the outer box 7. A steam generator 31 that is positioned in a gap 17c with the surface 7c and supplies steam into the heating chamber 2b to heat the object to be heated; an electric pump 32 that pumps water from the tank 30 to the steam generator 31; And a hose 33 for fluidly connecting the steam generator 31 and the steam generator 31.

  The steam generator 31 supplies steam from the steam jet 13 into the heating chamber 2b to heat the object to be heated. The steam generator 31 includes an evaporating heater 35 that heats water and generates steam.

  FIG. 4 is a partial cross-sectional view showing the steam generator of the heating cooker according to the embodiment of the present invention.

  As shown in FIG. 4, the steam generator 31 according to the present embodiment is provided with a cast box-like container 38 having a water supply port 36 for introducing water and a recess 37 connected to the water supply port 36, and the container 38. An evaporation heater 35 that heats water to generate steam, a sheet metal container lid 41 that has a spout 39 that guides the steam generated in the recess 37 to the heating chamber 2b and closes the recess 37 of the container 38; Is provided.

  The container 38 and the container lid 41 are made of the same kind of metal, specifically, an aluminum alloy, in order to prevent different metal contact corrosion.

  The container 38 is formed by casting, in particular by die casting. The concave portion 37 of the container 38 opens to the heating chamber 2b side. The water supply port 36 is located in a cylindrical joint portion protruding from the side surface of the container 38 facing the outer box 7, and is located below the jet port 39 of the container lid 41 when viewed in the vertical direction of the heating cooker 1.

  In addition, the container 38 includes a plurality of ribs 42 that form a labyrinth-like steam flow path in the recess 37. The plurality of ribs 42 are positioned at least below the ejection port 39. The maze-like steam passage formed by the plurality of ribs 42 further heats the steam generated in the recess 37.

  Further, the container 38 includes an ear plate 43 that fixes the container lid 41. The ear plate 43 protrudes from the container 38 so as to surround the recess 37 intermittently and annularly, and is crimped so as to hold the outer peripheral edge of the container lid 41 to firmly fix the container lid 41 to the container 38.

  The evaporating heater 35 is a straight tubular sheathed heater and is located below the recess 37. The evaporation heater 35 is preliminarily placed in a mold used for forming the container 38, and is then integrated with the container 38 by injecting molten metal (specifically, a molten aluminum alloy) to form the container 38. The outer peripheral surface of the evaporation heater 35 is in close contact with the case 45. The evaporating heater 35 heats the water flowing into the recess 37 from the water supply port 36 to generate steam. The electrodes at both ends of the evaporating heater 35 are positioned so as to protrude out of the container 38 and are electrically connected to power supply lead wires (not shown).

  The container lid 41 is formed by forming a sheet metal by press working such as punching or drawing.

  In addition, the container lid 41 includes a flange 46 that is located above the rib 42 of the container 38 and below the ejection port 39. The flange 46 is formed by pressing such as drawing applied to the container lid 41. The flange 46 is located directly below the ejection port 39 and immerses into the recess 37, and cooperates with the rib 42 in the recess 37 to prevent water accumulated in the recess 37 from flowing out to the ejection port 39.

  The spout 39 of the container lid 41 is located corresponding to the steam spout 13 of the inner box 5. The ejection port 39 is formed by drawing processing applied to the container lid 41 and has a cylindrical shape protruding from the container lid 41 toward the heating chamber 2b.

  When the steam generator 31 energizes and heats the evaporation heater 35 to reach a required temperature (for example, the bottom portion of the recess 37 is about 120 ° C.), the steam generator 31 guides water discharged from the electric pump 32 from the water supply port 36 to the recess 37. Generate steam. The steam rises in the concave portion 37 and reaches the ejection port 39, and is ejected into the heating chamber 2 b through the vapor ejection port 13 of the inner box 5. That is, the steam generating device 31 supplies steam directly from the jet port 39 to the steam jet port 13 of the inner box 5 without using a relay channel in the middle to reduce the heat loss of the steam.

  Next, another example of the steam generator 31 of the heating cooker 1 according to the embodiment will be described. In addition, the same code | symbol is attached | subjected to the structure same as the steam generator 31 in the steam generator 31A, 31B, 31C, and 31D demonstrated in each example, and the overlapping description is abbreviate | omitted.

  FIG. 5 is a partial cross-sectional view showing another example of the steam generator of the cooking device according to the embodiment of the present invention.

  As shown in FIG. 5, the steam generator 31 </ b> A according to this embodiment includes a seal portion 48 that fills the joint between the container 38 and the container lid 41. The seal portion 48 is formed by applying and curing a heat-resistant silicone adhesive. The seal portion 48 prevents water leakage through the joint between the container 38 and the container lid 41 from the inside of the recess 37 and joins the container 38 and the container lid 41 to each other. Reinforce.

  When the seal portion 48 has sufficient adhesive strength for fixing the container 38 and the container lid 41, the container 38 and the container lid 41 may be bonded and fixed without using the caulking joint by the ear plate 43. good. Further, the seal portion 48 may be applied and cured over a wide range of the contact surface between the container 38 and the container lid 41.

  FIG. 6 is a partial cross-sectional view showing another example of the steam generator of the heating cooker according to the embodiment of the present invention.

  As shown in FIG. 6, the steam generator 31 </ b> B according to the present embodiment fits the concave portion 51 and the convex portion 52 in place of the ear plate 43 to join and fix the container 38 and the container lid 41. A fitting fixing structure 53 is provided.

  The recess 51 is a groove on the container 38 side and surrounding the recess 37 in an annular shape. The concave portion 51 may be formed at a time when the container 38 is cast using an appropriate mold, or may be formed by additional processing such as cutting after the container 38 is cast.

  The convex portion 52 is on the container lid 41 side and extends in an annular shape corresponding to the concave portion 51. The convex portion 52 is formed by drawing processing as the container lid 41 is pressed.

  In the fitting and fixing structure 53, the thickness of the convex portion 52 is slightly larger than the groove width of the concave portion 51, the convex portion 52 is press-fitted into and joined to the concave portion 51, and the container 38 and the container lid 41 are firmly joined to each other. 37 prevents water and steam from leaking.

  FIG. 7 is a partial cross-sectional view showing another example of the steam generator of the cooking device according to the embodiment of the present invention.

  As shown in FIG. 7, the steam generator 31 </ b> C according to the present embodiment has a rib 55 formed by drawing applied to the outer peripheral edge of the container lid 41 and a container lid 41 that penetrates the container lid 41 and is fastened to the container 38. A fastening member 57 that fixes 41 to the container 38 and an annular seal ring 58 that is sandwiched between the container 38 and the container lid 41 are provided.

  The rib 55 enhances the rigidity of the container lid 41 so that a gap is not opened between the container 38 and the container lid 41 due to the vapor pressure in the concave portion 37. The rib 55 extends from the outer peripheral edge of the container lid 41 toward the outer box 7 in order to avoid interference with the inner box 5. The rib 55 desirably surrounds the entire outer peripheral edge of the container lid 41, but may be partially missing.

  The seal ring 58 surrounds the recess 37 in an annular shape. The seal ring 58 is fitted into a seal groove 59 formed in the container 38, contacts the container lid 41, and is crushed by the container 38 and the container lid 41 to improve the sealing performance.

  The fastening member 57 is a so-called screw or bolt, and contributes to the ease of assembly and disassembly of the steam generator 31C. The fastening member 57 passes through the opening 61 of the container lid 41 and is fastened into the screw hole 62 of the container 38 to fix the container lid 41 to the container 38. The fastening member 57 is located on the outer edge side of the container 38 relative to the seal ring 58 surrounding the recess 37, and prevents water and steam in the recess 37 from leaking from the opening 61 of the container lid 41.

  FIG. 8: is a partial cross-sectional view which shows the other example of the steam generator of the heating cooker which concerns on embodiment of this invention.

  As shown in FIG. 8, the steam generator 31D according to the present embodiment includes a thick portion 56 in which the container lid 41 is bent and the plate thickness is overlapped, and the thick portion 56 passes through the thick portion 56 and is fastened to the container 38. A fastening member 57 that fixes 41 to the container 38 and an annular seal ring 58 that is sandwiched between the container 38 and the container lid 41 are provided.

  The thick portion 56 is a portion where the plate thickness is doubled by bending the entire outer periphery of the container lid 41, for example. The thick portion 56 increases the rigidity of the container lid 41 so that a gap is not opened between the container 38 and the container lid 41 due to the vapor pressure in the concave portion 37, and exerts the fastening effect of the fastening member 57 in a wider range, The seal ring 58 is crushed more evenly to improve the sealing performance. The thick portion 56 desirably surrounds the entire outer peripheral edge of the container lid 41, but may be partially missing.

  The heating cooker 1 according to the present embodiment is a die-cast container 38 combined with a container lid 41 made of a sheet metal product, so that both the container and the container lid are formed by die casting, compared to a conventional steam generator. Thus, the cost of the steam generators 31, 31A, 31B, 31C, and 31D can be reduced, and the cost of the heating cooker 1 as a whole can be further reduced.

  Moreover, the heating cooker 1 which concerns on this embodiment forms the jet nozzle 39 easily by a drawing process, The vapor | steam which the steam generator 31 produces | generates by this cylindrical jet nozzle 39 efficiently into the heating chamber 2b. While being able to supply, it can prevent that an electromagnetic wave leaks from the inside of the heating chamber 2b through the steam jet 13 of the inner box 5.

  Furthermore, since the heating cooker 1 according to the present embodiment includes the flange portion 46 in the container lid 41, water spillage from the recess 37 to the ejection port 39 is prevented. The flange 46 can be formed by subjecting the container lid 41 to press working such as drawing, and can be easily formed.

  Furthermore, the heating cooker 1 according to the present embodiment increases the rigidity of the container lid 41 by forming the rib 55 on the outer edge portion of the container lid 41, and the container 38 and the container by the vapor pressure generated in the recess 37. It is difficult to form a gap between the lid 41 and the seal ring 58 can be reliably crushed to prevent water and steam from leaking from the recess 37. The rib 55 can be formed by subjecting the container lid 41 to press working such as drawing, and can be easily formed.

  In addition, the cooking device 1 according to the present embodiment increases the rigidity of the container lid 41 by bending the container lid 41 to form a thick wall portion 56, and the vapor pressure generated in the recess 37. As a result, it is difficult to create a gap between the container 38 and the container lid 41, and the seal ring 58 can be more uniformly and reliably crushed to prevent water and steam from leaking from the recess 37. The thick portion 56 can be formed by bending the container lid 41 and can be easily formed.

  Furthermore, since the cooking device 1 according to the present embodiment caulks the ear plate 43 and firmly fixes the container lid 41 to the container 38, the steam pressure generated in the recess 37 causes a gap between the container 38 and the container lid 41. Therefore, it is difficult to form a gap in the recess 37, and water and steam can be prevented from leaking from the inside of the recess 37. The ear plate 43 can be formed together with the casting of the container 38 and can be easily formed.

  Therefore, according to the heating cooker 1 which concerns on this embodiment, the steam generators 31, 31A, 31B, 31C, and 31D can be manufactured with a sheet metal processed product, and cost can be further reduced.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Heating cooker 2a Opening 2b Heating chamber 2 Cooking chamber 3 Door 5 Inner box 5a Back surface 5b Left side surface 5c Right side surface 5d Bottom surface 7 Outer box 7a Back surface 7c Right side surface 7d Bottom surface 8 Upper hot air discharge port 9 Lower hot air discharge port 11 Inlet port 12 Excitation port 13 Steam outlet 15 Internal temperature sensor 17, 17a, 17c, 17d Gap 20 Oven cooking mechanism 21 Fan device 22, 23 Heater 22a, 23a Upper side 22b, 23b Lower side 24 Casing 25 Fan motor 26 Centrifugal fan 27 Magnetron 28 Waveguide 29 Steam cooking mechanism 30 Tank 31, 31A, 31B, 31C, 31D Steam generator 32 Electric pump 33 Hose 35 Evaporating heater 36 Water supply port 37 Recess 38 Container 39 Spout port 41 Container lid 42 Rib 43 Ear plate 45 Case 46 ridge 48 seal part 51 concave part 52 convex part 53 fitting and fixing structure 55 rib 6 thick portion 57 fastening member 58 sealing ring 59 sealing groove 61 opening 62 threaded hole

Claims (5)

A cooking chamber for partitioning a heating chamber for storing an object to be heated;
A steam generator for supplying steam into the heating chamber to heat the object to be heated,
The steam generator is
A box-like container made of casting having a water inlet for introducing water and a recess connected to the water inlet;
A heater provided in the container for heating the water and generating the steam;
A heating cooker comprising: a sheet metal container lid that has a spout for guiding steam generated in the recess to the heating chamber and closes the recess of the container. The cooking device according to claim 1, wherein the spout is formed by a drawing process applied to the container lid and protrudes from the container lid toward the heating chamber. It is located under the jet outlet, is formed by drawing processing applied to the container lid, and includes a flange portion that prevents the water that enters the concave portion side and accumulates in the concave portion from flowing out to the jet outlet. The cooking device according to claim 1 or 2. A rib formed by drawing applied to the outer periphery of the container lid;
A thick portion where the container lid is folded to overlap the plate thickness;
The cooking device according to any one of claims 1 to 3, further comprising: a fastening member that penetrates the thick-walled portion and is fastened to the container to fix the container lid to the container. 5. An ear plate is provided that protrudes from the container so as to surround the periphery of the recess and is crimped so as to hold the outer peripheral edge of the container lid and fixes the container lid to the container. The heating cooker of any one of Claims.

Images