WO2016197527A1 - 微波饭煲 - Google Patents

微波饭煲 Download PDF

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Publication number
WO2016197527A1
WO2016197527A1 PCT/CN2015/093576 CN2015093576W WO2016197527A1 WO 2016197527 A1 WO2016197527 A1 WO 2016197527A1 CN 2015093576 W CN2015093576 W CN 2015093576W WO 2016197527 A1 WO2016197527 A1 WO 2016197527A1
Authority
WO
WIPO (PCT)
Prior art keywords
microwave
plate
cover
rice cooker
lateral
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2015/093576
Other languages
English (en)
French (fr)
Inventor
彭定元
陈茂顺
唐相伟
栾春
王轩
刘民勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
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
Application filed by Midea Group Co Ltd, Guangdong Midea Kitchen Appliances Manufacturing Co Ltd filed Critical Midea Group Co Ltd
Priority to JP2017564334A priority Critical patent/JP6624745B2/ja
Priority to KR1020187000411A priority patent/KR102018213B1/ko
Publication of WO2016197527A1 publication Critical patent/WO2016197527A1/zh
Priority to US15/836,637 priority patent/US10869368B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/80—Apparatus for specific applications
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6491—Aspects related to microwave heating combined with other heating techniques combined with the use of susceptors
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • A47J36/027—Cooking- or baking-vessels specially adapted for use in microwave ovens; Accessories therefor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J37/00—Baking; Roasting; Grilling; Frying
    • A47J37/06—Roasters; Grills; Sandwich grills
    • A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
    • A47J37/0629—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with electric heating elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6402—Aspects relating to the microwave cavity
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6414—Aspects relating to the door of the microwave heating apparatus
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/70—Feed lines
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/72—Radiators or antennas

Definitions

  • the invention belongs to the field of household appliances, and in particular to a microwave heating product.
  • the microwave oven commonly used in daily life is a modern cooking stove that uses microwave to heat food.
  • the power range is about 500 to 1000 watts.
  • Fig. 1 it is generally composed of a power source, a magnetron 11, a control circuit, and a cooking chamber.
  • the power supply supplies approximately 4,000 volts of high voltage to the magnetron 11, and the magnetron 11 continuously generates microwaves under excitation of the power source, and then passes through the waveguide assembly 6 to be coupled into the cooking chamber.
  • a rotatable agitator is arranged near the inlet of the cooking chamber. Since the agitator is a fan-shaped metal piece, after rotating, the microwave has various directions of reflection, so that the microwave energy can be evenly distributed in the cooking cavity. Thereby heating the food.
  • the microwave ovens on the market are all square in shape, have a square cooking cavity, and have a large internal space, so that the structure arrangement space is also abundant.
  • this conventional square microwave oven due to poor structural layout and unreasonable structural design of the components, the uniformity of microwave distribution is poor, resulting in low heating efficiency, slow speed and uneven heating, which brings many poor cooking experiences to the user.
  • the traditional microwave oven needs to add a lot of microwave accessories to realize the functions of cooking rice, soup, porridge, etc., resulting in a large number of attachments, complicated structures, and large space occupation.
  • the microwaves feed microwaves into the cooking cavity through the waveguide assembly 6, and the door body 27 is located in front of the microwave oven, and the door opening mode is mainly a side sliding door or a pull-down door. Due to the large volume of the cavity, the length of the waveguide assembly 6 is long, and the microwave is introduced into the bottom of the cavity from the laterally mounted magnetron 11 through the waveguide assembly 6, and when the microwave cavity is fed into the microwave cavity, the conduction distance of the microwave is far, resulting in The microwave transmission loss is large.
  • the microwave generated by the magnetron 11 is transmitted in the microwave tube, if the transmission path is long, the microwave concentration is easily formed, so that the microwave is unevenly distributed in the microwave transmission cavity in the waveguide, and the microwave is easily caused in the microwave transmission process. Focusing on the ignition makes the local temperature rise of the pipe surface of the microwave tube, the microwave energy is largely depleted, and the output efficiency of the microwave component 6 is poor, and the heating uniformity and the best cooking effect of the cooking process cannot be effectively ensured.
  • various microwave ovens are available in various microwave ovens, but the shape and structure thereof are designed into various hollow sheet-like structures to accommodate a square cooking cavity, but it is always difficult to make the microwave continue in the square cavity. Excellent distribution effect.
  • the present invention accordingly provides a microwave rice cooker having a small body shape, a small cavity, high heating efficiency, high speed, and more uniform heating, and can realize the combination of the microwave oven and the rice cooker. A feature.
  • the present invention provides a microwave rice cooker comprising a cavity structure, a door assembly, and a bladder capable of transmitting microwaves, the cavity structure including a microwave transmitting mechanism and a cooking cavity therein a cavity and a top cover and a bottom cover respectively located at opposite ends of the cooking chamber, the bottom cover sealing the cooking cavity from the bottom, the top cover is formed with a top opening of the cooking cavity, and the inner casing can be The top opening is placed in or removed from the cooking cavity; wherein the door assembly is openably and closably mounted on the top cover to open or close the cooking cavity from the top, the microwave transmitting mechanism is mounted to The bottom of the bottom cover feeds microwaves into the cooking cavity from the bottom.
  • the bottom cover is in the shape of a disk, and the inner side of the bottom cover is further formed with a downwardly concave pressing space, wherein the pressing space is provided with a circumferential step portion, and the circumferential step portion is provided with a transmissive
  • the pressing space is provided with a circumferential step portion, and the circumferential step portion is provided with a transmissive
  • the microwave shelf, the bladder embedded in the cooking chamber can be pressed against the shelf.
  • the first end of the door assembly is hinged to the first end of the top cover by a hinge mechanism
  • the second end of the top cover is provided with an interlocking mechanism and a control panel assembly is mounted
  • the door assembly is The two ends are provided with a door hook, and the door assembly is rotatable about the hinge mechanism to be in a closed state in which the cooking chamber is closed or in an open state in which the cooking chamber is opened;
  • the door assembly in the closed state, is capped on a top surface of the top cover, and the door hook and the interlocking mechanism lock combine to issue a door closing signal to the control panel assembly, the control panel
  • the assembly receives the door closing signal and triggers to an activated state; in the open state, the interlocking mechanism issues a door opening signal, and the control panel assembly switches to an inactive state according to the door opening signal.
  • the hinge mechanism includes a pivot shaft mounted on a first end of the top cover and a torsion spring, the door assembly being pivotable about the pivot axis, the torsion spring being sleeved on The pivot shaft and the two ends of the torsion spring are respectively elastically biased on the door assembly and the top cover.
  • the door assembly includes a door, a door body and a door seal that are sequentially joined from the outside to the inside, and the door and the door body include a metal plate member for closing the cooking cavity to prevent microwave transmission, the door A hook extends downwardly from the door body.
  • the door seal is disposed between the door body and the top cover to seal the cooking cavity.
  • the cavity comprises a microwave-transmissive metal cylindrical plate
  • the inner cavity of the cylindrical plate is formed as the cooking cavity
  • a top end of the cylindrical plate is connected to the top cover
  • the bottom of the cylindrical plate The end periphery is sealingly connected to the inner side wall of the bottom cover, and the top cover and the bottom cover are both metal shields that are resistant to microwave transmission.
  • the diameter of the inner liner is at least 15 mm smaller than the diameter of the cylindrical plate.
  • the microwave cooker further comprises a circumferential housing mounted on the base, the cavity structure being disposed around the cavity, the top end of the circumferential housing being joined The top cover and the bottom end are joined to the base.
  • the base further comprises:
  • cooling fan configured to dissipate heat from the frequency converter and the microwave transmitting mechanism
  • a frequency converter electrically connected to a magnetron of the microwave transmitting mechanism to adjust a power supply voltage of the magnetron.
  • the microwave transmitting mechanism includes a waveguide assembly and a magnetron, the waveguide assembly including a lateral portion and a downward extending portion extending downward from an end of the lateral portion, the magnetic portion being mounted on the lower extending portion Controlling, the magnetron inputs microwaves into the microwave transmission cavity in the waveguide assembly through a microwave inlet, the lateral portion is provided with a microwave outlet, and the bottom of the bottom cover is provided with a microwave feed inlet, and the lateral portion is connected to The bottom of the bottom cover and the microwave outlet are docked with the microwave feed inlet to feed microwaves into the cooking cavity.
  • the waveguide assembly comprises a base plate and a cover plate
  • the cover plate is "L” shaped and comprises a transverse cover plate and a longitudinal cover plate
  • the base plate has a "Z" shape and in turn comprises a first transverse bottom plate and a lower portion.
  • a web and a second lateral bottom plate wherein the outer periphery of the base plate is formed with a bottom flange, and the cover is sealingly covered on the bottom flange of the base plate to serve the base plate and the cover Forming the microwave transmission cavity therebetween;
  • the lateral cover plate is disposed above the first lateral bottom plate to form a lateral cavity of the microwave transmission cavity between the lateral cover plate and the first lateral bottom plate
  • the longitudinal cover plate and the Determining the lateral spacing of the web and the bottom end of the longitudinal cover extends downwardly to engage the second lateral floor to form the microwave transmission between the lower deck, the second transverse floor and the longitudinal cover a longitudinal chamber of the chamber, the microwave outlet being disposed on the lateral cover, the microwave inlet being disposed on the longitudinal cover.
  • the microwave rice cooker further comprises at least one or all of the following features 1 to 8:
  • Feature 1 the lower extension plate and the longitudinal cover plate are parallel to each other and both extend vertically downward;
  • the base plate is a bent and flanged single plate, and the waveguide assembly further includes an angle iron for laterally sealing the microwave transmission cavity, the angle iron being mounted in the microwave transmission cavity Transverse chamber and longitudinal chamber The lateral floor of the corner joint is turned over;
  • a welding connecting plate is arranged on the flange of the bottom plate, and the cover plate is welded on the welded connecting plate;
  • Feature 4 an end portion of the first lateral bottom plate adjacent to the lower extending plate is provided with a plurality of through-holes penetrating through, the flanged hole having a downward circumferential flange, the circumferential flanged downward The height of the flange is not less than 2mm;
  • a spherical groove opposite to the microwave inlet position is formed on an inner sidewall of the lower extension plate, and an outer wall of the spherical groove is outwardly convex to space the antenna head of the magnetron;
  • the bottom cover has a disk shape, and an outer end portion of the waveguide assembly is located within a peripheral edge of the bottom cover in a radial direction of the bottom cover;
  • the longitudinal length of the longitudinal cover is not more than 1.5 times the longitudinal length of the magnetron;
  • Feature 8 The volume ratio of the longitudinal chamber to the lateral chamber of the microwave transmission chamber is not less than 2.
  • the microwave rice cooker further comprises a stirring assembly comprising a microwave stirring plate and a stirring motor, wherein the microwave stirring plate has a disc shape and is disposed at a bottom of the cooking chamber and a bottom cover
  • the stirring motor is installed under the bottom cover and the motor output shaft of the stirring motor is connected to the microwave stirring plate through the bottom cover, and the microwave stirring plate is driven to rotate by the stirring motor to stir Enter the microwave in the cooking chamber.
  • the top surface of the microwave agitating plate is formed with an arc chord portion which is folded upward along the chord A, the arc chord portion including an inclined reflecting plane and an upper arc chord surface, the inclined reflecting plane from the upper arc chord
  • the chord B of the face extends obliquely downward and inwardly to the chord A on the top surface;
  • the arc chord portion is further provided with a slit which cuts off the middle portion of the inclined reflection plane and is in the middle portion Forming a lateral opening at the location;
  • One side of the center of the microwave stirring plate is formed with the arc chord portion, and the other side is provided with a first rectangular hole and a second rectangular hole vertically penetrating, and the first rectangular hole and the second rectangular hole are respectively
  • the proximal ends are close to each other and are disposed at an angle, the distal end of the first oblong hole extends toward one end of the chord A, and the distal end of the second oblong hole extends toward the other end of the chord A;
  • the first oblong hole and the second oblong hole are formed with an upwardly folded reflective flange on a long side of the center of the circle.
  • the microwave rice cooker further comprises at least one or all of the following features A to E:
  • the slit is a triangular cut, the triangular base of the cut is parallel to the chord A, and the line between the apex of the triangle and the center of the circle is perpendicular to the chord A and the chord B, two of the triangular cuts
  • the side edge is a cutting edge, the cutting edge is cut downward from the upper arc chord to the top surface of the microwave stirring plate to form the lateral opening;
  • the reflective cuff extends from a distal end of the long side near the center of the circle to a middle portion of the long side;
  • the first oblong hole and the second oblong hole are arranged at right angles, and the extension lines of the first oblong hole and the second oblong hole along the center line in the respective length directions can meet and meet The center of the circle and the vertices of the triangle are on the same straight line;
  • an angle between the inclined reflection plane and the plane of the top surface is 145° to 150°, and a height of the inclined reflection plane is not less than a height of the reflection flange;
  • Feature E The radial distance between the chord A and the center of the circle is not less than 0.3D, where D is the diameter length of the microwave agitating plate.
  • the agitation assembly further includes a stirring bracket including a cylindrical sleeve and a plurality of claws disposed circumferentially spaced apart from the outer peripheral portion of the cylindrical sleeve and extending outwardly, the microwave agitating plate a central mounting hole and a plurality of card slots disposed around the central mounting hole are disposed, the cylindrical sleeve of the stirring bracket is inserted into the central mounting hole, and the plurality of the claws are respectively buckled to the corresponding In the card slot;
  • a stirring bracket including a cylindrical sleeve and a plurality of claws disposed circumferentially spaced apart from the outer peripheral portion of the cylindrical sleeve and extending outwardly, the microwave agitating plate a central mounting hole and a plurality of card slots disposed around the central mounting hole are disposed, the cylindrical sleeve of the stirring bracket is inserted into the central mounting hole, and the plurality of the claws are respectively buckled to the corresponding In the card slot;
  • the bottom of the cylindrical sleeve is formed with a square inner hole
  • the stirring motor comprises a square output shaft
  • the square output shaft is embedded in the square inner hole
  • the microwave rice cooker of the invention combines the advantages of the microwave oven and the rice cooker, adopts the cooking cavity and the top part component of the rice cooker, the microwave heating principle of the microwave oven and the microwave matching technology, and the micro-cooking chamber can be placed in the cooking cavity.
  • the inner tank capable of transmitting waves can uniformly cook the food placed in the inner tank by microwave to cook rice, soup, porridge, etc., and the bottom of the cooking chamber can also be provided with a shelf for holding the articles to be heated, and the microwave heating is realized.
  • Microwave heating function can be provided with a shelf for holding the articles to be heated.
  • the conventional waveguide assembly cannot be installed in the lateral direction, so the microwave transmitting mechanism is disposed at the bottom of the microwave rice cooker, and the composition of the waveguide assembly and the microwave transmission cavity thereof are Optimized design makes the waveguide assembly small in size, compact in structure, short in microwave transmission distance, and reasonable in design of microwave transmission cavity, which can realize efficient transmission of microwave energy and achieve excellent microwave matching of microwave in the inner cavity of the component;
  • the microwave stirring plate is also designed into a disc shape and disposed in the space between the bottom cover and the shelf to fully stir the microwave, and the stirring motor, the waveguide assembly and the like are installed under the bottom cover, and the overall structure is compact and reasonable.
  • the microwave stirring plate is specially designed, and a rectangular hole is opened for vertically passing through the microwave, and an arc chord portion is further formed on the stirring plate, and an opening is formed through the slit on the arc chord portion for use
  • the inclined reflection plane folded over the arc chord portion and the reflective cuff on the oblong hole are used to reflect the microwave, so that the microwave entering the cooking cavity is evenly dispersed, and the food on the shelf is better.
  • the heating uniformity is better, and the microwave heating efficiency is also improved.
  • FIG. 1 is a schematic structural view of a microwave oven in the prior art, in which a part of the outer casing of the microwave oven is omitted for clearly reflecting the internal structure;
  • Figure 2 is similar to Figure 1, but more clearly shows the laterally assembled magnetron and waveguide assembly
  • FIG. 3 is a schematic structural view of a microwave rice cooker according to a preferred embodiment of the present invention, and the circumferential housing of the microwave rice cooker is omitted for clearly reflecting the internal structure;
  • FIG 4 is a schematic view showing the assembly of the microwave rice cooker shown in Figure 3;
  • FIG. 5 is a schematic structural view of a door assembly in the microwave rice cooker shown in FIG. 3;
  • FIG. 6 is a schematic structural view of a cavity structure of a microwave rice cooker according to a preferred embodiment of the present invention.
  • Figure 7 illustrates a liner for placement into a cylindrical cooking chamber of the microwave rice cooker shown in Figure 3;
  • Figure 8 is an exploded view of the cavity structure of the microwave rice cooker shown in Figure 6;
  • FIG. 9 is a schematic structural view of a waveguide assembly suitable for a microwave rice cooker according to a preferred embodiment of the present invention.
  • Figure 10 is an exploded view of the waveguide assembly shown in Figure 9;
  • Figure 11 is a perspective view of the base plate of the waveguide assembly shown in Figure 9;
  • Figure 12 is a perspective view of the cover of the waveguide assembly shown in Figure 9;
  • Figure 13 is a perspective view showing the structure of a microwave stirring plate according to a preferred embodiment of the present invention.
  • Figure 14 is a half cross-sectional view of the microwave agitating plate and the stirring motor shown in Figure 13 assembled;
  • 15 to 17 are schematic views showing the structure of the microwave stirring plate shown in Fig. 13, in which the size and positional relationship of the respective portions of the microwave stirring plate are specifically shown.
  • orientation words such as “up, down, top, bottom, and portrait” used are generally for the directions shown in the drawings or for vertical, vertical or The positional relationship of the components in the direction of gravity is described in terms of the positional relationship; “lateral” is generally referred to in the left-right direction of the drawing with respect to the drawing.
  • “Internal and external” generally refers to the radially inside and outside of the chamber relative to the chamber or relative to the center of the circle.
  • the present invention provides a novel microwave rice cooker comprising a cavity structure, a door assembly and a liner 20 capable of transmitting microwaves (usually non-metallic materials, but not limited thereto).
  • the cavity structure comprises a microwave transmitting mechanism, a cavity 2 having a cooking cavity (generally cylindrical, but not limited thereto), and a top cover 1 and a bottom cover 5 respectively located at opposite ends of the cooking chamber, the bottom cover 5 capping the cooking cavity from the bottom, the top cover 1 is formed with a top opening of the cooking cavity, and the inner liner 20 can be inserted into or taken out of the cooking cavity from the top opening; wherein the door assembly can be opened and closed on the top cover 1 To open or close the cooking chamber from the top, a microwave transmitting mechanism is mounted to the bottom of the bottom cover 5 to feed microwaves into the cooking chamber from the bottom.
  • the microwave rice cooker of the present invention combines the functions of a microwave oven and a rice cooker, and there is no microwave heating product of such a cylindrical (or cylindrical) microwave cavity on the market.
  • the microwave rice cooker has the top part component structure of the rice cooker, the built-in cooking cavity and the inner tank 20, is convenient to put into the food to be heated, and conforms to the habitual operation of the rice cooker, and the cylindrical cooking cavity is also favorable for microwave heating, which is favorable for microwave distribution. More uniform, making heating more efficient, heating faster and more uniform.
  • Microwave heating is also realized by a microwave transmitting mechanism that feeds microwaves from the bottom, using microwave heating principle of microwave oven and microwave matching technology
  • the microwave that is fed into the cylindrical cooking chamber can directly feed the food placed in the inner tank through the inner liner 20 to realize the rice cooker function, the rice cooker, the porridge, and the like, or the conventional microwave heating function.
  • the bottom of the cooking chamber can also be separately provided with a shelf 3 for holding the articles to be heated, such as a disc-shaped ceramic plate, a plastic plate or a glass plate, etc., so that the heating function of the microwave oven can be realized by microwave heating.
  • Both the shelf 3 and the inner liner 20 can be made of a material such as ceramics, plastics, glass, or the like that can pass through without heating.
  • the bottom cover 5 is also designed in a disc shape, and as shown in FIG. 8, the bottom cover 5 is further recessed with respect to the inner side of the cooking cavity.
  • the molding space is provided with one or more circumferential step portions, and the above-mentioned shelf 3 can be placed on the circumferential step portion, thereby stably supporting the shelf 3 and facilitating the taking of the shelf 3. More preferably, the bladder 20 embedded in the cooking chamber can be pressed against the shelf 3 for placement to be stable. It is of course conceivable that the inner tank can also be fixed by other means, for example, the top edge of the inner liner 20 is bent downwards so as to be able to engage in a correspondingly designed annular card slot in the cavity 2.
  • the cavity 2 may include a metal cylindrical plate that is resistant to microwave transmission, and the inner cylindrical cavity of the cylindrical plate is formed as a cooking cavity, and the cylindrical plate is preferably a galvanized plate, a tin plate, or a stainless steel plate. .
  • the top edge of the cylindrical plate may be connected to the top cover 1 by welding or embedding, etc., the peripheral edge of the bottom end of the cylindrical plate is sealingly connected to the inner side wall of the bottom cover 5, and the top cover 1, the cylindrical plate and the bottom cover 5 are all resistant to microwave transmission.
  • the metal cover prevents the microwaves in the cooking chamber from radiating outward.
  • the cylindrical cavity has an inner diameter of 230 mm to 260 mm; and the cylindrical cavity has a height of 105 mm to 135 mm.
  • the diameter of the inner liner 20 shown in FIG. 7 is smaller than the diameter of the cylindrical plate, for example, at least 15 mm, such as 20 mm, 30 mm, etc., so that it can be placed not only in the cooking chamber but also conveniently removed therefrom, and both The annular gap between the two facilitates repeated refraction and reflection of the microwaves in the cooking chamber on the inner wall of the cylindrical plate, thereby achieving uniform heating of the inner liner 20.
  • the first end (right end in the drawing) of the door assembly is hinged to the first end (right end in the drawing) of the top cover 1 by the hinge mechanism 22, and the second end of the top cover 1 (
  • the left end of the figure is provided with an interlocking mechanism 23 and is mounted with a box-shaped control panel assembly 24, the top cover 1 is designed to be substantially stretched in the lateral direction of the drawing, and the second end of the door assembly is provided with a door hook 25, which can surround the door assembly
  • the hinge mechanism 22 rotates to be in a closed state of the closed cooking chamber or in an open state in which the cooking chamber is opened; wherein, in the closed state, the door assembly is capped on the top surface of the top cover 1, and the door hook 25 passes through the door shown in FIG.
  • the control panel assembly 24 receives the door closing signal and triggers to an activated state; in the open state, the interlocking mechanism 23 issues a door opening signal, and the control panel assembly 24 switches to the inactive state in accordance with the door opening signal.
  • the hinge mechanism 22 may further include a torsion spring 222 outside the pivot shaft 221, the pivot shaft 221 is mounted on the first end of the top cover 1, the door assembly is pivotable about the pivot shaft 221, and the torsion spring 222 is sleeved Both ends of the torsion spring 222 are elastically biased on the door assembly and the top cover 1, respectively. In this way, the door assembly can be elastically opened for easy operation.
  • the hinge manner and structure between the door assembly and the top cover 1 are not limited to the embodiment, and the interlocking mechanism 23 herein is also well known to those skilled in the art, and will not be further described herein. In operation, the door assembly is closed in place and the door hook 25 is naturally inserted into the interlocking mechanism 23 for locking.
  • the interlocking mechanism 23 generally has a depressible unlocking button, and by pressing the unlocking button, the door assembly can be automatically popped open.
  • the door assembly of the present embodiment includes a front door 26, a door body 27 and a door seal 28 which are sequentially joined from the outside to the inside.
  • the front door 26 and the door body 27 include a closed cooking chamber for preventing microwave transmission.
  • the metal plate member, the door hook 25 extends downward from the door body 27.
  • the door seal 28 is placed between the door body 27 and the top cover 1 to seal the cooking cavity.
  • the door body 27 is preferably a metal structural member, which functions as a structural support and prevents the microwave from transmitting outward.
  • the facade 26 functions as a decorative appearance, and the vent hole should be provided on the front surface 26 to facilitate steaming when used as a rice cooker.
  • a sealing ring 29 (for example, a rubber ring) or the like may be disposed between the door body 27 and the door seal 28.
  • the microwave rice cooker may further include a circumferential housing 17 and a base 18, the bottom of which is mounted on the base 18, and the circumferential housing 17 is disposed around the cavity 2 to support the circumference in a fixed manner.
  • the cavity structure, the top end of the circumferential housing 17 can be fixedly engaged with the top cover 1 by, for example, a buckle or a screw, and the bottom end can be joined to the base 18 in a similar manner, thereby constituting the similar rice cooker shown in FIG. The shape.
  • the microwave transmitting mechanism or the like is disposed at the bottom of the cavity, the magnetron 11 of the microwave transmitting mechanism and the inverter 21 connected thereto to adjust the power supply voltage of the magnetron 11 are all heat generating units, and the heat is concentrated, so that the base 18 is One or more cooling fans 19 can be correspondingly arranged to achieve forced convection cooling.
  • the basic functional composition and appearance structure of the microwave rice cooker are described above.
  • a microwave transmitting mechanism and a microwave stirring assembly specially designed for the cylindrical cooking chamber of the present embodiment will be separately described, and a special cavity structure as shown in FIG. 6 formed on the basis of this will be described to realize microwaves. Fully stirred, utilized and evenly and efficiently heated.
  • the conventional long-length waveguide assembly bent from the side to the bottom shown in FIG. 2 is difficult to be applied to the cylindrical microwave rice cooker of the present invention, and the cylindrical chamber structure is small in size and side wall.
  • the welding operation of the waveguide assembly on the cylindrical surface is difficult, and the magnetron tube also needs to be installed laterally in the lateral direction of the cylindrical chamber structure, which causes the radial size of the microwave rice cooker to be too large.
  • the excessive length of the microwave transmission cavity will bring about the aforementioned problems to the microwave transmission.
  • the present invention also provides a microwave transmitting mechanism dedicated to a microwave rice cooker, the microwave transmitting mechanism comprising a waveguide assembly 6 and a magnetron 11, the waveguide assembly 6 comprising a lateral portion and A downwardly extending portion extending downward from an end portion of the lateral portion, a magnetron 11 is mounted on the lower portion, and the magnetron 11 receives microwaves through the microwave inlet 12 into the microwave transmission chamber 63 in the waveguide assembly 6, the lateral portion A microwave outlet 10 is provided.
  • the bottom of the bottom cover 5 is provided with a microwave feed inlet 9, and the lateral portion is connected to the bottom of the bottom cover 5 and the microwave outlet 10 is docked with the microwave feed inlet 9 to feed microwaves into the cooking chamber.
  • the microwave generated by the magnetron 11 enters the microwave transmission cavity 63 through a magnetron antenna head (not shown) inserted into the microwave inlet 12, where it is oscillated and matched, and then from one end of the waveguide assembly 6 (i.e., the lateral portion)
  • the microwave is fed through the microwave outlet 10 and the microwave feed inlet 9 from the bottom of the microwave rice cooker, and the other end of the waveguide assembly 6 is no longer wound up to the side wall of the cavity for mounting and fixing, but is extended downward to form a lower portion. It can be mounted to the base 18. This solves the problem that the welding operation is not easy and the size of the microwave rice cooker is too large, and the conveying path of the microwave transfer chamber 63 is also made shorter.
  • the outer end portion of the waveguide assembly 6 is preferably located within the outer peripheral edge of the bottom cover 5 such that the radial direction of the circumferential casing 17 The size is minimized.
  • the waveguide assembly 6 of the present invention is structurally optimized. 10 to 12, the waveguide assembly 6 includes a base plate 61 and a cover plate 62, which is in an "L" shape and includes a lateral cover plate 621 and a longitudinal cover plate 622.
  • the base plate 61 has a "Z" shape and The first lateral bottom plate 611, the lower extending plate 612 and the second lateral bottom plate 613 are sequentially included, and the outer peripheral edge of the base plate 61 is formed with a bottom plate flange 614, and the cover plate 62 is sealingly covered on the bottom plate flange 614 of the base plate 61. , to form a microwave transmission cavity 63 between the base plate 61 and the cover plate 62;
  • the lateral cover plate 621 is disposed above the first lateral bottom plate 611 to form a lateral cavity of the microwave transmission cavity 63 between the lateral cover plate 621 and the first lateral bottom plate 611, and the longitudinal cover plate 622 and the lower extension plate 612 are laterally disposed.
  • the bottom end of the spacer and longitudinal cover 622 extends downwardly to engage the second lateral bottom plate 613 to form a longitudinal chamber of the microwave transfer chamber 63 between the lower extension plate 612, the second lateral bottom plate 613 and the longitudinal cover plate 622, the microwave outlet 10 is disposed on the lateral cover 621, and the microwave inlet 12 is disposed on the longitudinal cover 622.
  • the microwave inlet 12 may be disposed on the lowering plate 612, that is, the magnetron 11 is mounted on the left side of the lowering plate 612.
  • the waveguide assembly 6 can preferably be made simply of two veneers. That is, the base plate 61 is a single plate that is bent and formed to be cuffed around, in other words, the single plate with the bottom flange 614 and the "Z" plate as a unitary structure, and the cover plate 62 only needs to be simply bent into an "L" shape.
  • the material selection is easy and convenient for processing and manufacturing.
  • the lower extension plate 612 The longitudinal cover plates 622 are preferably parallel to each other and extend vertically downwards to be aesthetically pleasing and to facilitate microwave reflection and shock matching.
  • the waveguide assembly 6 also includes two or more angle irons 13 for laterally enclosing the microwave transfer chamber 63 that are mounted at the corner joints described above to shield the microwaves and increase the structural strength of the assembly.
  • the base plate 61 and the cover plate 62 are welded to each other, and the base plate flange 614 is provided with a welded connecting plate 14 on the entire circumference thereof, and the cover plate 62 is covered and welded to the welded connecting plate 14. Since the entire waveguide assembly 6 needs to be welded to the bottom cover 5 through the lateral cover plate 621, the end portion of the first lateral bottom plate 611 close to the lower extension plate 612 is provided with a plurality of through-holes 15 for supporting and facilitating welding.
  • the flange hole 15 has a downward circumferential flange, and the height of the downward flange of the circumferential flange is preferably not less than 2 mm, so that the microwave in the microwave transmission cavity 63 is not from the flange hole 15. Radiated outward.
  • the inner side wall of the lower extension plate 612 is preferably also formed with a spherical groove 16 opposite to the position of the microwave inlet 12, the spherical groove 16 The outer wall is convex outward to avoid the antenna head of the magnetron 11, increasing the spacing.
  • the longitudinal cavity of the microwave transmission cavity 63 is The volume ratio of the transverse chamber is preferably not less than 2, and the longitudinal length of the longitudinal cover 622 is preferably not more than 1.5 times the longitudinal length of the magnetron 11.
  • the microwave outlet 10 is designed as a square hole having a length of 80 mm and a width of 50 mm to 80 mm, and the microwave is led out by the square hole.
  • the center of the square hole is 70 mm to 80 mm from the right side of the lateral cover plate 621, and the aperture of the microwave inlet 12 is matched with the head of the magnetron tube, and the height of the center of the longitudinal cover plate 622 is 38 to 42 mm.
  • the entire lateral length (including the total lateral length of the lateral chamber and the longitudinal chamber) is 120 to 130 mm
  • the space height of the lateral chamber is 15 to 20 mm
  • the space height of the longitudinal chamber is 58 to 65 mm.
  • the lateral length of the longitudinal chamber (i.e., the lateral spacing of the lowering plate 612 and the longitudinal cover 622) is 32 to 46 mm; the width of the base plate 61 is similar to the width of the cover 62, and is 80 mm.
  • a rounded corner is further provided between the first lateral bottom plate 611 and the lower extending plate 612, and the rounding radius is 5-12 mm.
  • the present invention accordingly provides a microwave agitating plate and a microwave appliance having the microwave agitating plate 4, such as the illustrated microwave rice cooker or the like.
  • the microwave rice cooker has a beautiful appearance, which is completely different from the existing square microwave oven.
  • the cylindrical cooking cavity is relatively small and cylindrical, which makes it impossible to match the traditional microwave stirring component, and needs Optimize the assembly relationship of many microwave components.
  • the bottom of the cylindrical cooking chamber of the present invention may be provided with a shelf 3 for containing food to be heated, microwaves entering from the bottom of the cylindrical cooking chamber, and between the bottom cover 5 and the shelf 3
  • the microwave stirring plate 4 is correspondingly designed into a disk shape and correspondingly disposed in the microwave stirring space to sufficiently agitate the microwave.
  • the microwave agitating plate 4 is usually a metal plate, and the agitating motor 7 for driving the microwave agitating plate 4 and other waveguide assemblies for generating and transmitting microwaves are mounted below the bottom cover 5 to be supported to the base 18.
  • the bottom cover 5 provides structural support when the microwave stirring plate 4 is installed, and the top cover 1, the cavity 2, and the bottom cover 5 also function to externally close the cooking cavity to prevent microwave leakage.
  • the microwave rice cooker includes a stirring bracket 8 including a cylindrical sleeve and a cylindrical sleeve.
  • the microwave stirring plate 4 is provided with a central mounting hole and a plurality of card slots 46 disposed around the central mounting hole, and the cylinder of the stirring bracket 8
  • the sleeve is inserted into the central mounting hole, and the plurality of claws 81 are respectively hooked into the corresponding slots 46; and the bottom of the cylindrical sleeve is formed with a square inner hole, and the stirring motor 7 includes a square output shaft 71, and the square output The shaft 71 is embedded in the square bore.
  • the agitating bracket 8 is engaged with the microwave agitating plate 4 by a snapping method, and the agitating motor 7 is connected by the agitating bracket 8 and drives the microwave agitating plate 4 to rotate to perform a stirring operation.
  • the stirring bracket 8 and the microwave stirring plate 4 are not only tightly coupled, but also more convenient to disassemble, and the square-shaped shaft hole between the stirring bracket 8 and the stirring motor 7 is also convenient to be disassembled and assembled, and is not easy to produce circumferential slip. Make the drive and rotation stable.
  • the correspondingly provided microwave agitating plate 4 matching the microwave rice cooker 4 has a chord A41 along the chord.
  • An upwardly folded arc chord portion including a sloped reflection plane 42 and an upper arc chord surface 44 that slopes obliquely downward from the chord B43 of the upper arc chord plane 44 and extends inwardly to the chord on the top surface A41; a slit is further provided on the arc chord portion, the slit cuts off the intermediate portion of the inclined reflecting plane 42 and forms a lateral opening 45 at the intermediate portion; further, one side of the center O of the microwave stirring plate 4 is formed with an arc chord portion The other side is provided with a first oblong hole 47 and a second oblong hole 48 which are vertically penetrated.
  • first oblong hole 47 and the second oblong hole 48 are adjacent to each other and disposed at an angle, and the first oblong hole 47 is disposed.
  • the distal end of the second oblong hole 48 extends toward the other end of the chord A41; wherein the first oblong hole 47 and the second oblong hole 48 are adjacent to the long side of the center O Forming a reflection that is folded upward Edge 49.
  • the oblong hole is used for allowing the microwave to pass vertically, and the gap between the outer peripheral edge of the upwardly folded arc chord portion and the inner wall of the cooking cavity is also allowed to pass vertically by the microwave, the inclined reflection plane 42 on the arc chord portion and the rectangle
  • the reflective cuffs 49 on the holes can be used to reflect the microwaves, and the lateral openings 45 formed by the slits on the arc chord portion can partially vibrate the microwaves along the microwave agitating plate 4 after being repeatedly reflected by the inclined reflecting plane 42 and the reflecting crests 49.
  • the top direction passes transversely through the arc chord.
  • the structural design on the microwave agitating plate 4 comprehensively considers the lateral and vertical passage of the microwave and the multi-level reflection.
  • the microwave is fed into the cooking chamber by the microwave inlet 9, and is agitated by the microwave stirring plate 4 to sufficiently agitate the microwave to improve the uniform dispersion of the microwave.
  • the microwave agitating plate 4 of the above structure is sufficiently rotated, the microwave can be stirred particularly well and fully, the microwave dispersion in the cylindrical cooking chamber is more fully distributed, the heating is more uniform, and the heating efficiency is improved.
  • the above is the basic structure and function of the top surface of the microwave agitating plate 4 according to the present invention.
  • the specific shape and dimensional relationship of each of the basic structures are also optimized.
  • the radial distance between the string A41 and the center O should be not less than 0.3D, where D is the diameter length of the microwave agitating plate 4.
  • the arc chord portion is folded up twice, and is folded upward along the chord A41 to form a slanted reflection plane 42, and then folded again along the chord B43 to form an upper chord surface 44, i.e., a "Z" shaped cuff is formed.
  • the upper arc chord 44 and the top surface of the microwave agitating plate 4 are preferably parallel to maintain aesthetics.
  • the angle between the inclined reflecting plane 42 and the top surface is preferably 145° to 150°, that is, the angle a in Fig. 14 is 30° to 35°.
  • the reflective flange 49 is disposed opposite to the oblique reflection plane 42 and is preferably vertically upwardly folded, and the height of the inclined reflection plane 42 is not to be less than the height of the reflection flange 49, that is, the fold height H is greater than the flange height H1, such that three The combination achieves an optimized reflection effect.
  • the reflective cuff 49 preferably extends from a distal end near the long side of the center O to a middle portion of the long side.
  • the first oblong hole 47 and the second oblong hole 48 are arranged at right angles, that is, the angle b of FIG. 16 is 90°. More preferably, in order to make the structure on the top surface of the microwave stirring plate 4 symmetrical and enhance the reflection effect, the first oblong hole 47 and the second oblong hole 48 are arranged to meet along the extension line of the center line in the respective length directions, see FIG. 16, wherein the intersection, the center O, and the apex O' of the triangle are preferably on substantially the same straight line.
  • the slits on the arc chord portion are preferably triangular incisions, especially equilateral triangular incisions, the triangular base edges (non-cutting edges) of the slits are parallel or even aligned with the chord A41, and the line between the apex O' and the center O of the triangle Roughly perpendicular to the chord A41 and the chord B43, see Figure 16.
  • the two sides of the triangular cut are actual cutting edges which are cut downward from the upper arc chord 44 to the top surface of the microwave agitating plate 4, and the cut portion on the inclined reflecting plane 42 is detachable, thereby finally forming a lateral opening. Hole 45.
  • the disk surface diameter D is 103-128 mm, and the radial distance between the string A41 and the center O, that is, the core distance J is 38-42 mm; the folding height H 4.5mm, the flange height H1 is 3.5mm ⁇ 4.5mm; the length of the long side of the reflective flange 49 is 55-60mm, the width W of the wide side is 11.5 ⁇ 12.5mm, and the length L1 of the flange is 25-30mm; The length Q is 20 to 25 mm.
  • the microwave stirring plate 4 was repeatedly tested to obtain a very good microwave stirring effect.
  • the cavity structure of the microwave rice cooker shown in Fig. 6 is constructed in combination with the above-described cylindrical cooking chamber, microwave transmitting mechanism and stirring assembly.
  • the agitation assembly is mounted to the bottom of the bottom cover 5 together with the waveguide assembly 6 and the magnetron.
  • One end of the waveguide assembly 6 abuts against the bottom of the bottom cover 5 and can be fixed by screws or the like, and the other end is provided with a magnetron 11; the bottom cover 5 is provided with a microwave inlet 9, and the microwave outlet 10 of the waveguide assembly 6 is aligned with the microwave inlet 9,
  • the agitating motor 7 can also be fixedly mounted to the bottom of the bottom cover 5 by a motor bracket 64 and by screws or the like, and the square output shaft 71 of the stirring motor 7 sequentially passes through the shaft hole, the microwave outlet 10 and the microwave inlet 9, and penetrates the bottom cover 5
  • the inside is connected to the stirring bracket 8 to drive the microwave stirring plate 4 to rotate.
  • the opening design on the bottom cover 5 is not only used to pass the microwave, but is more advantageous for alignment during assembly.
  • the layout of the cavity structure of the microwave rice cooker is compact and reasonable, and after packaging the circumferential housing 17 (see Fig. 4), the rice cooker having the microwave heating function is formed, and the appearance is more beautiful, compared with the existing one.
  • the larger square microwave oven, the microwave rice cooker is smaller in size, easy to move in the room, and even transported, which realizes the diversification of microwave heating products, and can better meet the aesthetic and practical functions of a large number of potential customers in the market. demand.
  • the shape of the cooking chamber may be, for example, a rectangular tube shape other than the cylindrical shape exemplified in the present embodiment, and the assembly structure of the square output shaft 71 and the square inner hole between the stirring motor 7 and the stirring bracket 8 may be changed to Common keyway fits, these simple variations are not beyond the scope of the present invention and are therefore within the scope of the present invention.

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Abstract

一种微波饭煲，包括腔体结构、门组件和内胆(20)，腔体结构包括微波发送机构、内设圆筒形烹调腔的腔体(2)以及分别位于烹调腔两端的顶盖(1)和底盖(5)，该底盖（5）从底部封盖烹调腔，顶盖（1）上形成有烹调腔的顶部开口，内胆（20）能够从顶部开口放入烹调腔中或从中取出；其中，门组件可启闭地安装在顶盖（1）上以从顶部打开或封闭烹调腔，微波发送机构安装于底盖（5）的底部以从该底部将微波馈入烹调腔内。该微波饭煲实现了微波炉和饭煲的二合一功能。

Description

微波饭煲 技术领域
本发明属于家用电器领域，具体地，涉及一种微波加热产品。
背景技术
日常生活中常见的微波炉是用微波加热食品的现代化烹调灶具，其功率范围为500～1000瓦左右，如图1所示，一般由电源、磁控管11、控制电路和烹调腔等部分组成。电源向磁控管11提供大约4000伏高压，磁控管11在电源激励下，连续产生微波，再经过波导组件6，耦合到烹调腔内。在烹调腔的进口处附近，设有可旋转的搅拌器，由于搅拌器是风扇状的金属片，旋转起来以后对微波具有各个方向的反射，所以能够把微波能量均匀地分布在烹调腔内，从而加热食物。
如图1和图2所示，目前市面上的微波炉结构都是方形，具有方形的烹调腔，内部空间较大，使得结构布置空间也较为充裕。但在这种传统方形微波炉中，由于结构布局差，部件结构设计不合理，导致微波分布均匀性差，造成加热效率低、速度慢且加热不均匀，给使用者带来许多较差的煮食体验，一直困扰着整个微波炉行业。若传统微波炉为了实现饭煲功能，则需要添加诸多微波附件来实现煮饭、煲汤、煲粥等功能，造成增加附件繁多、结构繁杂，占用空间大。
以图2的方形微波炉为例，微波通过波导组件6向烹调腔内馈入微波，门体27位于微波炉前面，开门方式主要为侧拉门或下拉门。由于腔体体积较大，使得波导组件6的长度较长，微波通过波导组件6从侧向安装的磁控管11导入腔体底部，进而馈入微波腔内时，微波的传导路程远，造成微波传输损失大。具体的，磁控管11产生的微波在微波管内进行传输时，若传输路径长则容易形成微波集中，使得微波在波导管内的微波传输腔内分布不均匀，易于引起微波传输过程中微波多处聚焦打火，使得微波管的管道表面产生局部温度升高，微波能量大量损耗，微波组件6的输出效率稳定性差，也不能有效确保煮食烹饪过程的加热均匀性和最佳烹饪效果。
另外，现有的各种微波炉中具有多种多样的微波搅拌器，但其形状结构多设计成各式镂空的片状结构，以适应方形烹调腔，然而始终难以使得微波在方形腔内达到持续优良的分布效果。
随着社会的进步与多样化发展，客户潜在地需求更多功能的，体型、腔体更小的、且更便携的微波新产品。为此，亟需对微波产品的结构布置及其部件设计进行全新设计。
发明内容
针对现有技术中的上述不足或缺陷，本发明相应提供了一种微波饭煲，其体型、腔体较小，加热效率高、速度快、加热更均匀，能够实现微波炉和饭煲的二合一功能。
为实现上述目的，本发明提供了一种微波饭煲，该微波饭煲包括腔体结构、门组件以及能够透射微波的内胆，所述腔体结构包括微波发送机构、内设有烹调腔的腔体以及分别位于所述烹调腔两端的顶盖和底盖，该底盖从底部封盖所述烹调腔，所述顶盖上形成有所述烹调腔的顶部开口，所述内胆能够从所述顶部开口放入所述烹调腔中或从中取出；其中，所述门组件可启闭地安装在所述顶盖上以从顶部打开或封闭所述烹调腔，所述微波发送机构安装于所述底盖的底部以从该底部将微波馈入所述烹调腔内。
优选地，所述底盖为圆盘状，所述底盖的内侧还形成有向下凹陷的压型空间，该压型空间内设有圆周台阶部，所述圆周台阶部上设有能够透射微波的搁板，嵌入所述烹调腔内的所述内胆能够承压在所述搁板上。
优选地，所述门组件的第一端通过铰链机构与所述顶盖的第一端铰接，所述顶盖的第二端设有连锁机构并安装有控制面板组件，所述门组件的第二端设有门勾，所述门组件能够围绕所述铰链机构旋转而处于封闭所述烹调腔的闭合状态或处于打开所述烹调腔的打开状态；
其中，在所述闭合状态，所述门组件封盖于所述顶盖的顶面上，所述门勾与所述连锁机构锁合并向所述控制面板组件发出门体关闭信号，该控制面板组件接收所述门体关闭信号并触发至激活状态；在所述打开状态，所述连锁机构发出门体打开信号，所述控制面板组件根据所述门体打开信号而切换至非激活状态。
优选地，所述铰链机构包括枢转轴和扭簧，所述枢转轴安装在所述顶盖的第一端上，所述门组件能够围绕所述枢转轴枢转，所述扭簧套设在所述枢转轴上且该扭簧的两端分别弹性偏压于所述门组件和所述顶盖上。
优选地，所述门组件包括由外至内依次接合的门面、门体和门封，所述门面和门体中包括用于封闭所述烹调腔以防微波透射的金属板件，所述门勾从所述门体上向下延伸，在所述门组件的所述闭合状态，所述门封垫设于所述门体与所述顶盖之间以密封所述烹调腔。
优选地，所述腔体包括防微波透射的金属圆柱板，该圆柱板的内筒腔形成为所述烹调腔，所述圆柱板的顶端周缘连接于所述顶盖，所述圆柱板的底端周缘密封连接于所述底盖的内侧壁，所述顶盖和底盖均为防微波透射的金属盖体。
优选地，所述内胆的直径比所述圆柱板的直径至少小15mm。
优选地，该微波饭煲还包括周向壳体和底座，所述腔体结构安装在所述底座上，所述周向壳体围绕所述腔体设置，所述周向壳体的顶端接合所述顶盖且底端接合于所述底座上。
优选地，所述底座上还设有：
散热风扇，所述散热风扇用于对所述变频器和所述微波发送机构进行散热；和
变频器，所述变频器与所述微波发送机构的磁控管电连接以调节该磁控管的供电电压。
优选地，所述微波发送机构包括波导组件和磁控管，所述波导组件包括横向部分和从该横向部分的端部向下延伸的下延部分，所述下延部分上安装有所述磁控管，该磁控管通过微波入口向所述波导组件内的微波传输腔输入微波，所述横向部分设有微波出口，所述底盖的底部设有微波馈入口，所述横向部分连接于所述底盖的底部并使得所述微波出口与所述微波馈入口对接以将微波馈入所述烹调腔内。
优选地，所述波导组件包括基底板和盖板，该盖板呈“L”形并包括横向盖板和纵向盖板，所述基底板呈“Z”形并依次包括第一横向底板、下延板和第二横向底板，所述基底板的外周缘均形成有底板翻边，所述盖板密封地罩盖在所述基底板的底板翻边上，以在所述基底板与盖板之间形成所述微波传输腔；
其中，所述横向盖板设置在所述第一横向底板的上方，以在所述横向盖板与第一横向底板之间形成所述微波传输腔的横向腔室，所述纵向盖板与所述下延板横向间隔并且所述纵向盖板的底端向下延伸至接合所述第二横向底板，以在所述下延板、第二横向底板和纵向盖板之间形成所述微波传输腔的纵向腔室，所述微波出口设置在所述横向盖板上，所述微波入口设置在所述纵向盖板上。
优选地，该微波饭煲还包括下述特征1至特征8中的至少一个或全部：
特征1：所述下延板与所述纵向盖板相互平行并且均竖直向下延伸；
特征2：所述基底板为弯折成型且翻边的单块板，所述波导组件还包括用于从侧向密封所述微波传输腔的角铁，该角铁安装在所述微波传输腔的横向腔室与纵向腔室的拐 角连通处的侧向的所述底板翻边上；
特征3：所述底板翻边上设有焊接连接板，所述盖板焊接在所述焊接连接板上；
特征4：所述第一横向底板的靠近所述下延板的端部设有贯通的多个翻边孔，该翻边孔具有向下的周向翻边，该周向翻边的向下翻边高度不小于2mm；
特征5：所述下延板的内侧壁上还形成有与所述微波入口位置相对的球面凹槽，该球面凹槽的外壁向外凸起以间隔开所述磁控管的天线头；
特征6：所述底盖呈圆盘状，在该底盖的径向上，所述波导组件的外端部位于所述底盖的外周边缘以内；
特征7：所述纵向盖板的纵向长度不大于所述磁控管的纵向长度的1.5倍；
特征8：所述微波传输腔的所述纵向腔室与所述横向腔室的体积比不小于2。
优选地，所微波饭煲还包括搅拌组件，该搅拌组件包括微波搅拌板和搅拌电机，所述微波搅拌板呈圆盘形形状并设置在所述烹调腔底部的搁板与所述底盖之间，所述搅拌电机安装在所述底盖的下方并且该搅拌电机的电机输出轴穿过所述底盖与所述微波搅拌板相连，所述微波搅拌板由所述搅拌电机驱动旋转以搅拌进入所述烹调腔内的微波。
优选地，所述微波搅拌板的顶面上形成有沿弦A向上翻折的弧弦部，该弧弦部包括倾斜反射平面和上弧弦面，所述倾斜反射平面从所述上弧弦面的弦B倾斜向下且向内地延伸至所述顶面上的所述弦A；所述弧弦部上还设有切口，该切口切除所述倾斜反射平面的中间部分并在该中间部分处形成横向开孔；
所述微波搅拌板的圆心的一侧形成有所述弧弦部，另一侧设有竖向贯通的第一长方形孔和第二长方形孔，所述第一长方形孔与第二长方形孔的各自靠近端相互接近并呈夹角布置，所述第一长方形孔的远端朝向所述弦A的一端方向延伸，所述第二长方形孔的远端朝向所述弦A的另一端方向延伸；其中，所述第一长方形孔和第二长方形孔的靠近所述圆心的长边上均形成有向上翻折的反射翻边。
优选地，该微波饭煲还包括下述特征A至特征E中的至少一个或全部：
特征A：所述切口为三角形切口，该切口的三角形底边与所述弦A平行，三角形顶点与所述圆心之间的连线垂直于所述弦A和弦B，所述三角形切口的两个侧边为切削边，该切削边从所述上弧弦面向下切削至所述微波搅拌板的顶面以形成所述横向开孔；
特征B：所述反射翻边从靠近所述圆心的所述长边的远端延伸至所述长边的中部；
特征C：所述第一长方形孔和第二长方形孔之间呈直角夹角布置，所述第一长方形孔和第二长方形孔的沿各自长度方向上的中线的延长线能够交汇，且交汇点、所述圆心以及所述三角形顶点处于同一直线上；
特征D：所述倾斜反射平面与所述顶面之间的平面夹角为145°～150°，所述倾斜反射平面的高度不小于所述反射翻边的高度；
特征E：所述弦A与所述圆心之间的径向距离不小于0.3D，其中D为所述微波搅拌板的直径长度。
优选地，所述搅拌组件还包括搅拌支架，该搅拌支架包括圆柱套筒和沿所述圆柱套筒的外周部的周向间隔布置且向外伸出的多个卡爪，所述微波搅拌板上设有中心安装孔和围绕该中心安装孔设置的多个卡槽，所述搅拌支架的圆柱套筒插装于所述中心安装孔中，多个所述卡爪分别卡扣于对应的所述卡槽中；
其中，所述圆柱套筒的底部形成有方形内孔，所述搅拌电机包括方形输出轴，该方形输出轴嵌入所述方形内孔中。
通过上述技术方案，本发明的微波饭煲结合了微波炉和饭煲的优点，采用了饭煲的烹调腔和顶部门组件以及微波炉的微波加热原理及微波匹配技术，烹调腔内可放置微 波能够透射的内胆，通过微波均匀加热内胆中放置的食材可实现煮饭、煲汤、煲粥等，烹调腔的底部也可设置用于盛放待加热物品的搁板，通过微波加热实现微波炉加热功能。其中，由于腔体的体积小且侧壁为圆弧形，传统波导组件无法安装在侧向，因而将微波发送机构设置在微波饭煲的底部，并对波导组件的构成及其微波传输腔等进行了优化设计，使波导组件的尺寸小、结构紧凑、微波传输距离短，微波传输腔的设计更合理，能够实现微波能量的高效传输及实现微波在组件内腔中的优良的微波匹配；此外还将微波搅拌板相应设计成圆盘形形状并设置在底盖与搁板之间的空间内以便充分搅拌微波，搅拌电机、波导组件等则安装在底盖下方，整体结构布局紧凑、合理，相较于常规的方形微波炉，其体型、腔体较小，外观优美，便携性更好。进一步地，针对烹调腔的特点，对微波搅拌板进行了特别设计，开设长方形孔以用于竖向通过微波，搅拌板上还形成有弧弦部，弧弦部上通过切口形成开孔以用于横向通过微波，弧弦部上翻折的倾斜反射平面以及长方形孔上的反射翻边均用于反射微波，从而使得进入烹调腔内的微波均匀分散性更好，对搁板上的食物的加热均匀性更优，同时也提高了微波加热效率。
本发明的其它特征和优点将在随后的具体实施方式部分予以详细说明。
附图说明
附图是用来提供对本发明的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本发明，但并不构成对本发明的限制。在附图中：
图1为现有技术中的一种微波炉的结构示意图，其中为清楚体现内部结构，省略了微波炉的部分外壳体；
图2与图1类似，但更清楚的显示了侧向装配的磁控管和波导组件；
图3为根据本发明的优选实施方式的微波饭煲的结构示意图，同样为清楚体现内部结构，省略了微波饭煲的周向壳体；
图4为图3所示的微波饭煲的装配示意图；
图5为图3所示的微波饭煲中的门组件的结构示意图；
图6为根据本发明的优选实施方式的微波饭煲的腔体结构的结构示意图；
图7图示了用于放置到图3所示的微波饭煲的圆筒形烹调腔中的内胆；
图8为图6所示的微波饭煲的腔体结构的爆炸图；
图9为根据本发明的优选实施方式的适于微波饭煲的波导组件的结构示意图；
图10为图9所示的波导组件的爆炸图；
图11为图9所示的波导组件的基底板的立体视图；
图12为图9所示的波导组件的盖板的立体视图；
图13为根据本发明的优选实施方式的微波搅拌板的立体结构示意图；
图14为图13所示的微波搅拌板与搅拌电机装配后的半剖视图；
图15至图17均为图13所示的微波搅拌板的结构示意图，其中具体显示了该微波搅拌板上的各个部分的尺寸与位置关系。
附图标记说明
1                顶盖                          2             腔体
3                搁板                          4             微波搅拌板
5                底盖                          6             波导组件
7                搅拌电机                      8             搅拌支架
9                微波馈入口                    10            微波出口
11               磁控管                        12            微波入口
13               角铁                          14            焊接连接板
15           翻边孔                          16            球面凹槽
17           周向壳体                           18            底座
19           散热风扇                           20            内胆
21           变频器                          22            铰链机构
23           连锁机构                           24            控制面板组件
25           门勾                               26            门面
27           门体                               28            门封
29           密封圈                         41            弦A
42           倾斜反射平面                   43            弦B
44           上弧弦面                           45            横向开孔
46           卡槽                               47            第一长方形孔
48           第二长方形孔                   49            反射翻边
61           基底板                         62            盖板
63           微波传输腔                     64            电机支架
71           方形输出轴                     81            卡爪
221          枢转轴                         222      扭簧
611          第一横向底板                   612      下延板
613          第二横向底板                   614      底板翻边
621          横向盖板                           622      纵向盖板
O            圆心                               O’          三角形顶点
a,  b        夹角                               D            盘面直径
H            翻折高度                           H1           翻边高度
J            弦心距离                           L1           翻边长度
L            长边长度                           Q            切削边长度
W            宽边宽度
具体实施方式
以下结合附图对本发明的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本发明，并不用于限制本发明。
在本发明中，在未作相反说明的情况下，使用的方位词如“上、下、顶、底、纵向”通常是针对附图所示的方向而言的或者是针对竖直、垂直或重力方向上而言的各部件相互位置关系描述用词；“横向”通常是针对附图沿纸面的左右方向而言的。“内、外”通常指的是相对于腔室而言的腔室内外或相对于圆心而言的径向内外。
如图3至图8所示，本发明提供了一种新型微波饭煲，该微波饭煲包括腔体结构、门组件以及能够透射微波的内胆20(通常为非金属材质，但不限于此)，腔体结构包括微波发送机构、内设有烹调腔(通常为圆筒形，但也不限于此)的腔体2以及分别位于烹调腔两端的顶盖1和底盖5，该底盖5从底部封盖烹调腔，顶盖1上形成有烹调腔的顶部开口，内胆20能够从顶部开口放入烹调腔中或从中取出；其中，门组件可启闭地安装在顶盖1上以从顶部打开或封闭烹调腔，微波发送机构安装于底盖5的底部以从该底部将微波馈入烹调腔内。
本发明的微波饭煲集微波炉与饭煲的功能为一身，目前市场上并无此类圆筒(或圆柱)形微波腔体的微波加热产品。微波饭煲具有电饭煲的顶部门组件结构，内置烹调腔以及内胆20，方便放入待加热食物，符合对饭煲的习惯性操作，圆筒形烹调腔也有利于微波加热，有利于微波分布更均匀，使得加热效率更高、加热更快更均匀。还通过从底部馈入微波的微波发送机构实现微波加热，利用微波炉的微波加热原理及微波匹配技 术，馈入圆筒形烹调腔内的微波透过内胆20可直接热内胆中放置的食材，实现煮饭、煲汤、煲粥等饭煲功能或者常规的微波炉加热功能。
当然，烹调腔的底部也可单独设置用于盛放待加热物品的搁板3，例如圆盘形陶瓷板、塑料板或玻璃板等，这样通过微波加热，可实现微波炉的加热功能。搁板3和内胆20均可采用常见的陶瓷、塑料、玻璃等微波能够穿过而不对其进行加热的材料。具体的，由于本实施方式中采用了圆筒形烹调腔，底盖5也相应地设计为圆盘状，如图8所示，底盖5的相对于烹调腔的内侧还形成有向下凹陷的压型空间，该压型空间内设有一个或多个圆周台阶部，圆周台阶部上可放置上述的搁板3，从而得以稳定支撑搁板3，也方便搁板3的取拿。更优选的，嵌入烹调腔内的内胆20能够承压在搁板3上，以放置稳当。当然可想到的，内胆也可通过其它方式固定，例如内胆20的顶端边缘向下弯折，从而能够卡合于腔体2中相应设计的环形卡槽中。
参见图2，作为一种示例，腔体2可包括防微波透射的金属圆柱板，该圆柱板的内筒腔即形成为烹调腔，圆柱板优选为镀锌板、镀锡板、或不锈钢板。圆柱板的顶端周缘可通过焊接或嵌入等方式连接于顶盖1，圆柱板的底端周缘则密封连接于底盖5的内侧壁，顶盖1、圆柱板和底盖5均为防微波透射的金属盖体，使得烹调腔内的微波不能向外辐射。在图示的本实施方式中，圆柱型腔体的内径为230mm～260mm；圆柱型腔体高度为105mm～135mm。其中优选的，图7所示的内胆20的直径应比圆柱板的直径小，例如至少小15mm，例如20mm、30mm等，这样不仅能够放入烹调腔内或方便从中取出，而且二者之间的环形间隙，方便了烹调腔内的微波在圆柱板的内壁上反复折射、反射，从而实现对内胆20的均匀加热。
参见图4，在本实施方式中，门组件的第一端(图中的右端)通过铰链机构22与顶盖1的第一端(图中的右端)铰接，顶盖1的第二端(图中的左端)设有连锁机构23并安装有盒状的控制面板组件24，顶盖1设计成沿图中横向大致拉伸，门组件的第二端设有门勾25，门组件能够围绕铰链机构22旋转而处于封闭烹调腔的闭合状态或处于打开烹调腔的打开状态；其中，在闭合状态，门组件封盖于顶盖1的顶面上，门勾25穿过图5所示的门封28上开设的相应贯通孔，进而与连锁机构23锁合并向控制面板组件24发出门体关闭信号，该控制面板组件24接收门体关闭信号并触发至激活状态；在打开状态，连锁机构23发出门体打开信号，控制面板组件24根据门体打开信号而切换至非激活状态。通过这种示例的连锁设计，可确保有且仅有在门组件完全切实关闭，使得微波局限于烹调腔内而不能对外辐射时，方可启动微波饭煲，进行微波加热。
进一步的，铰链机构22在枢转轴221之外还可包括扭簧222，枢转轴221安装在顶盖1的第一端上，门组件能够围绕枢转轴221枢转，扭簧222则套设在枢转轴221上且该扭簧222的两端分别弹性偏压于门组件和顶盖1上。这样，门组件就能够实现弹性打开，方便操作。当然可理解的是，门组件与顶盖1之间的铰接方式和结构并不局限于本实施方式，此处的连锁机构23也为本领域技术人员所熟知，在此也不一一赘述。在操作时，将门组件闭合到位，则门勾25自然插入连锁机构23，实现锁合。连锁机构23一般都带有可按压的解锁按钮，通过按压该解锁按钮，门组件可自动弹开。
如图5所示，本实施方式中的门组件包括由外至内依次接合的门面26、门体27和门封28，门面26和门体27中包括用于封闭烹调腔以防微波透射的金属板件，门勾25从门体27上向下延伸，在门组件的闭合状态，门封28垫设于门体27与顶盖1之间以密封烹调腔。其中，门体27优选为金属结构件，起到结构支撑作用和防止微波向外透射，门面26起到外观装饰作用，门面26上应设置排气孔等，方便当做饭煲使用时，蒸汽得以排出，此时为保持腔体气压，防止水汽进入门体27内并缓冲外界冲击等，门体27与门封28之间还可设置密封圈29(例如胶圈)等。
除了腔体顶部的门组件，微波饭煲还可包括周向壳体17和底座18，腔体结构的底部安装在底座18上，周向壳体17围绕腔体2设置以周向固定支持该腔体结构，周向壳体17的顶端可通过例如扣位或螺钉等固定接合顶盖1，并且底端可以类似方式接合于底座18上，从而在外观上构成图3所示的类似饭煲的外形。此外由于微波发送机构等设置在腔体底部，微波发送机构的磁控管11以及与其相连以调节该磁控管11的供电电压的变频器21均是发热单元，发热量集中，因而在底座18上可相应设置一个或多个散热风扇19，实现强制对流冷却。
以上介绍了微波饭煲的基本功能组成及外观结构。下面将分别介绍为适于本实施方式的圆筒形烹调腔而特别设计的微波发送机构和微波搅拌组件，以及在此基础上形成的如图6所示的特别的腔体结构，以实现微波的充分搅拌、利用和均匀、高效加热。
在本发明中，图2所示的传统的从侧向弯绕至底部的长条状波导组件难以适用于本发明的圆柱形的微波饭煲中，圆柱形腔室结构的体型小，侧壁为圆柱面，波导组件在圆柱面上的焊接操作困难，再加上磁控管也需相应地安装在圆柱形腔室结构的侧向，则会导致微波饭煲的径向尺寸过大。而且，如前所述，微波传输腔过长将给微波传输带来前述的种种问题。
因此，参见图6、图8至图12，本发明还提供了专用于微波饭煲的一种微波发送机构，该微波发送机构包括波导组件6和磁控管11，波导组件6包括横向部分和从该横向部分的端部向下延伸的下延部分，下延部分上安装有磁控管11，该磁控管11通过微波入口12向波导组件6内的微波传输腔63输入微波，横向部分设有微波出口10，底盖5的底部设有微波馈入口9，横向部分连接于底盖5的底部并使得微波出口10与微波馈入口9对接以将微波馈入烹调腔内。
在本发明中，磁控管11产生的微波通过插入微波入口12内的磁控管天线头(未显示)进入微波传输腔63，在其中震荡匹配，再从波导组件6的一端(即横向部分)通过微波出口10与微波馈入口9从微波饭煲的底部馈入微波，波导组件6的另一端不再向上绕到腔体侧壁上进行安装固定，而是顺延向下，形成下延部分，可安装到底座18上。这样就解决了焊接操作不易和微波饭煲尺寸过大的问题，也使得微波传输腔63的输送路径更短。其中，在底盖5呈圆盘状的情况下，在该底盖5的径向上，波导组件6的外端部优选为位于底盖5的外周边缘以内，使得周向壳体17的径向尺寸最小化。
为使得微波在微波传输腔63内获得更好的震荡匹配和传输效果，并且利于制造，本发明的波导组件6进行了结构优化。如图10至图12，该波导组件6包括基底板61和盖板62，该盖板62呈“L”形并包括横向盖板621和纵向盖板622，基底板61呈“Z”形并依次包括第一横向底板611、下延板612和第二横向底板613，基底板61的外周缘均形成有底板翻边614，盖板62密封地罩盖在基底板61的底板翻边614上，以在基底板61与盖板62之间形成微波传输腔63；
其中，横向盖板621设置在第一横向底板611的上方，以在横向盖板621与第一横向底板611之间形成微波传输腔63的横向腔室，纵向盖板622与下延板612横向间隔并且纵向盖板622的底端向下延伸至接合第二横向底板613，以在下延板612、第二横向底板613和纵向盖板622之间形成微波传输腔63的纵向腔室，微波出口10设置在横向盖板621上，微波入口12设置在纵向盖板622上。当然，在图6所示的腔体结构中，若不设置搅拌电机7的情况下，微波入口12也可设置在下延板612上，即磁控管11安装在下延板612的左侧。
可见在结构组成上，此波导组件6可优选地简单通过两块单板制成。即基底板61为弯折成型且四周翻边的单块板，换言之底板翻边614与“Z”形板为一体结构的单块板，盖板62则仅需简单弯折成“L”形，选材容易，方便加工制造。其中，下延板612 与纵向盖板622优选为相互平行并且均竖直向下延伸，以美观并便于微波的反射、震荡匹配。单块板的基底板61在弯折翻边时，底板翻边614在微波传输腔63的横向腔室与纵向腔室的拐角连通处的侧向容易产生拉伸或产生缺口，如图10所示。因此，波导组件6还包括用于从侧向封闭微波传输腔63的两块或更多角铁13，该角铁13安装在上述拐角连通处以屏蔽微波并提高组件结构强度。
在本实施方式中，基底板61与盖板62相互焊接在一起，底板翻边614的整个周向上都设有焊接连接板14，盖板62盖上并焊接在焊接连接板14上。由于整个波导组件6需要通过横向盖板621焊接到底盖5上，因此第一横向底板611的靠近下延板612的端部需设有贯通的多个翻边孔15，以支撑和方便焊接。其中，该翻边孔15具有向下的周向翻边，该周向翻边的向下翻边高度优选为不小于2mm，以使得微波传输腔63内的微波不至于从翻边孔15中向外辐射出。另外，由于磁控管天线头插入微波传输腔63的纵向腔室较深，下延板612的内侧壁上还优选地形成有与微波入口12位置相对的球面凹槽16，该球面凹槽16的外壁向外凸起以避开磁控管11的天线头，增加间距。
为使得微波在微波传输腔63内很好的震荡匹配，在纵向腔室至横向腔室之间取得较好的传输效果，并方便磁控管11的安装，微波传输腔63的纵向腔室与横向腔室的体积比优选为不小于2，并且纵向盖板622的纵向长度优选为不大于磁控管11的纵向长度的1.5倍。
在图示的具体实施方式中，在盖板62上，微波出口10设计为方形孔，方形孔的长度为80mm，宽度为50mm～80mm，微波由此方形孔导出。方形孔的中心距离横向盖板621的右侧为70mm～80mm，微波入口12的孔径与磁控管天线头相匹配，其中心距离纵向盖板622的顶端的高度为38～42mm。在基底板61上，整个横向长度(包括横向腔室和纵向腔室的总横向长度)为120～130mm，横向腔室的空间高度为15～20mm，纵向腔室的空间高度为58～65mm，纵向腔室的横向长度(即下延板612与纵向盖板622的横向间距)为32～46mm；基底板61的宽度与盖板62宽度相近，为80mm作用。翻边孔15为四个，孔径为8mm～10mm，翻边孔15的向下翻边的翻边高度2mm～3mm。为便于微波从纵向腔室向横向腔室传输，第一横向底板611与下延板612之间还设有倒圆角，倒圆角半径为5～12mm。
微波从波导组件6馈入圆筒形微波腔后，更需要增加微波的分布均匀性，以加热均匀、快速，为此需要通过微波搅拌件进行充分搅拌。由于现有技术中几乎不存在相应的圆筒形微波腔室，当然也就难以发现与圆筒形微波腔体匹配的搅拌件或搅拌结构。为满足这一需求，参见图8、图13至图17，本发明相应提供了一种微波搅拌板以及具有该微波搅拌板4的微波电器，例如图示的微波饭煲或其他。
作为一种新概念产品，微波饭煲的外形优美，与现有的方形微波炉完全不同，圆筒形烹调腔相对更小且呈圆筒形，这使得与传统的微波搅拌组件无法匹配，而且需要优化构建诸多微波组件的装配关系。如前所述，本发明的圆筒形烹调腔的底部可设置搁板3以盛放待加热的食品，微波从圆筒形烹调腔的底部进入，底盖5与搁板3之间可留作微波搅拌空间，微波搅拌板4相应设计成圆盘形形状并相应地设置在该微波搅拌空间内以对微波进行充分的搅拌。
微波搅拌板4通常采用金属板，驱动微波搅拌板4的搅拌电机7以及产生和传送微波的其它波导组件等则安装在底盖5的下方，可支撑到底座18上。其中，底盖5提供微波搅拌板4安装时的结构支撑，顶盖1、腔体2、底盖5还起到对外封闭烹调腔以防微波外泄的作用。
在展示微波搅拌板4的结构之前，先描述微波搅拌板4的安装和支撑结构。如图13和图14所示，该微波饭煲包括搅拌支架8，该搅拌支架8包括圆柱套筒和沿圆柱套 筒的外周部的周向间隔布置且向外伸出的多个卡爪81，微波搅拌板4上设有中心安装孔和围绕该中心安装孔设置的多个卡槽46，搅拌支架8的圆柱套筒插装于中心安装孔中，多个卡爪81分别卡扣于对应的卡槽46中；并且圆柱套筒的底部形成有方形内孔，搅拌电机7包括方形输出轴71，该方形输出轴71嵌入方形内孔中。换言之，搅拌支架8通过卡扣方式与微波搅拌板4接合，搅拌电机7通过搅拌支架8连接并驱动微波搅拌板4旋转以进行搅拌作业。通过卡扣方式，搅拌支架8与微波搅拌板4不仅接合紧密，更方便拆装，搅拌支架8与搅拌电机7之间的方形形状的轴孔配合同样方便拆装，且不易产生周向打滑，使得驱动与旋转稳定。当然，图示仅作例举，本领域技术人员能够知晓的是，搅拌支架8的形状结构及其与搅拌电机7或微波搅拌板4之间的连接结构等还可以有多种其他常规设计，例如搅拌支架8与微波搅拌板4的一体结构设计等，在此不再一一举例。
如前所述，由于微波饭煲独特的烹调腔形状，难以使用现有的微波搅拌组件，因而本发明相应提供的与该微波饭煲匹配的微波搅拌板4的顶面上形成有沿弦A41向上翻折的弧弦部，该弧弦部包括倾斜反射平面42和上弧弦面44，倾斜反射平面42从上弧弦面44的弦B43倾斜向下且向内地延伸至顶面上的弦A41；弧弦部上还设有切口，该切口切除倾斜反射平面42的中间部分并在该中间部分处形成横向开孔45；此外，微波搅拌板4的圆心O的一侧形成有弧弦部，另一侧设有竖向贯通的第一长方形孔47和第二长方形孔48，第一长方形孔47与第二长方形孔48的各自靠近端相互接近并呈夹角布置，第一长方形孔47的远端朝向弦A41的一端方向延伸，第二长方形孔48的远端朝向弦A41的另一端方向延伸；其中，第一长方形孔47和第二长方形孔48的靠近圆心O的长边上均形成有向上翻折的反射翻边49。
其中，长方形孔用于使微波能够竖向通过，向上翻折的弧弦部的外周边缘与烹调腔内壁之间的间隙也可供微波竖向通过，弧弦部上的倾斜反射平面42以及长方形孔上的反射翻边49均可用于反射微波，弧弦部上通过切口形成的横向开孔45可使经由倾斜反射平面42和反射翻边49多次反射后的部分微波沿微波搅拌板4的顶面方向横向穿过弧弦部。其中，微波搅拌板4的上的结构设计综合考虑了微波的横向和竖向通过性以及多层次反射。微波由微波入口9馈入烹调腔内，经过微波搅拌板4的搅动，对微波进行充分搅拌，提高微波的均匀分散性。诸多试验表明，在上述结构的微波搅拌板4充分旋转时，能够尤其且充分地搅拌微波，使圆筒形烹调腔内微波散布更充分，加热更均匀，提高加热效率。
以上为根据本发明的微波搅拌板4的顶面上的基本结构及其功能。在本实施方式中，还优化设计了各个基本结构的具体形状和尺寸关系等。具体的，弦A41与圆心O之间的径向距离应不小于0.3D，其中D为微波搅拌板4的直径长度。弧弦部向上翻折两次，沿弦A41向上翻折形成倾斜反射平面42，而后再次沿弦B43翻折形成上弧弦面44，即形成“Z”字形翻边。其中，该上弧弦面44与微波搅拌板4的顶面优选为平行，以保持美观。倾斜反射平面42与顶面之间的平面夹角优选为145°～150°，即图14中的夹角a为30°～35°。反射翻边49与倾斜反射平面42相对布置并优选为竖直向上翻折，并且倾斜反射平面42的高度应不小于反射翻边49的高度，即翻折高度H大于翻边高度H1，使得三者结合后取得优化的反射效果。反射翻边49优选地从靠近圆心O的长边的远端延伸至长边的中部。
第一长方形孔47和第二长方形孔48之间优选为呈直角夹角布置，即图16的夹角b为90°。更优选地，为使得微波搅拌板4的顶面上的结构对称，增强反射效果，第一长方形孔47和第二长方形孔48布置成沿各自长度方向上的中线的延长线能够交汇，参见图16，其中该交汇点、圆心O以及三角形顶点O’优选为处于大致同一直线上。
另外，弧弦部上的切口优选为三角形切口，尤其是等边三角形切口，该切口的三角形底边(非切削边)与弦A41平行甚至对齐，三角形顶点O’与圆心O之间的连线大致垂直于弦A41和弦B43，参见图16。三角形切口的两个侧边为实际切削边，该切削边从上弧弦面44向下切削至微波搅拌板4的顶面，倾斜反射平面42上的被切削部分可剔除，从而最终形成横向开孔45。
作为一种具体实施方式，图示的微波搅拌板4中，盘面直径D为103～128mm，弦A41与圆心O之间的径向距离，即弦心距离J为38～42mm；翻折高度H为4.5mm，翻边高度H1为3.5mm～4.5mm；反射翻边49的长边长度L为55～60mm，宽边宽度W为11.5～12.5mm，翻边长度L1为25～30mm；切削边长度Q为20～25mm。在上述尺寸范围内，对微波搅拌板4进行了反复试验，取得了非常好的微波搅拌效果。
在结合上述的圆筒形烹调腔、微波发送机构和搅拌组件的基础上，构成了图6所示的微波饭煲的腔体结构。参见图8至图10，搅拌组件与波导组件6、磁控管一起安装在底盖5的底部。波导组件6的一端抵接于底盖5的底部并可通过螺钉等固定，另一端安装磁控管11；底盖5上设有微波入口9，波导组件6的微波出口10对齐微波入口9，搅拌电机7也可通过电机支架64并利用螺钉等固定安装在底盖5的底部，并且搅拌电机7的方形输出轴71依次穿过轴孔、微波出口10和微波入口9，穿入底盖5内与搅拌支架8连接以驱动微波搅拌板4旋转。底盖5上的开口设计不仅用于通过微波，更有利于装配时的对齐。
参见图6，微波饭煲的腔体结构的布局紧凑、合理，在增设周向壳体17(见图4)包装后，构成具有微波加热功能的电饭煲，外观更显优美，相对于现有的体型较大的方形微波炉，微波饭煲的体型更小，便于在房内的移动摆放，甚至运输携带，实现了微波加热产品的多样化，更能满足市场潜在的大量客户的审美和实际功能需求。
以上结合附图详细描述了本发明的优选实施方式，但是，本发明并不限于上述实施方式中的具体细节，在本发明的技术构思范围内，可以对本发明的技术方案进行多种简单变型，例如烹调腔的形状可以是除了本实施方式所例举的圆筒形以外的例如方筒形等，搅拌电机7与搅拌支架8之间的方形输出轴71与方形内孔的装配结构可变型为常见的键槽配合，这些简单变型均未超出本发明的构思，因而均属于本发明的保护范围。
另外需要说明的是，在上述具体实施方式中所描述的各个具体技术特征，在不矛盾的情况下，可以通过任何合适的方式进行组合，为了避免不必要的重复，本发明对各种可能的组合方式不再另行说明。
此外，本发明的各种不同的实施方式之间也可以进行任意组合，只要其不违背本发明的思想，其同样应当视为本发明所公开的内容。

Claims (16)

  1. 一种微波饭煲，该微波饭煲包括腔体结构、门组件以及能够透射微波的内胆(20)，所述腔体结构包括微波发送机构、内设有烹调腔的腔体(2)以及分别位于所述烹调腔两端的顶盖(1)和底盖(5)，该底盖(5)从底部封盖所述烹调腔，所述顶盖(1)上形成有所述烹调腔的顶部开口，所述内胆(20)能够从所述顶部开口放入所述烹调腔中或从中取出；其中，所述门组件可启闭地安装在所述顶盖(1)上以从顶部打开或封闭所述烹调腔，所述微波发送机构安装于所述底盖(5)的底部以从该底部将微波馈入所述烹调腔内。
  2. 根据权利要求1所述的微波饭煲，其中，所述底盖(5)为圆盘状，所述底盖(5)的内侧还形成有向下凹陷的压型空间，该压型空间内设有圆周台阶部，所述圆周台阶部上设有能够透射微波的搁板(3)，嵌入所述烹调腔内的所述内胆(20)能够承压在所述搁板(3)上。
  3. 根据权利要求1所述的微波饭煲，其中，所述门组件的第一端通过铰链机构(22)与所述顶盖(1)的第一端铰接，所述顶盖(1)的第二端设有连锁机构(23)并安装有控制面板组件(24)，所述门组件的第二端设有门勾(25)，所述门组件能够围绕所述铰链机构(22)旋转而处于封闭所述烹调腔的闭合状态或处于打开所述烹调腔的打开状态；
    其中，在所述闭合状态，所述门组件封盖于所述顶盖(1)的顶面上，所述门勾(25)与所述连锁机构(23)锁合并向所述控制面板组件(24)发出门体关闭信号，该控制面板组件(24)接收所述门体关闭信号并触发至激活状态；在所述打开状态，所述连锁机构(23)发出门体打开信号，所述控制面板组件(24)根据所述门体打开信号而切换至非激活状态。
  4. 根据权利要求3所述的微波饭煲，其中，所述铰链机构(22)包括枢转轴(221)和扭簧(222)，所述枢转轴(221)安装在所述顶盖(1)的第一端上，所述门组件能够围绕所述枢转轴(221)枢转，所述扭簧(222)套设在所述枢转轴(221)上且该扭簧(222)的两端分别弹性偏压于所述门组件和所述顶盖(1)上。
  5. 根据权利要求3所述的微波饭煲，其中，所述门组件包括由外至内依次接合的门面(26)、门体(27)和门封(28)，所述门面(26)和门体(27)中包括用于封闭所述烹调腔以防微波透射的金属板件，所述门勾(25)从所述门体(27)上向下延伸，在所述门组件的所述闭合状态，所述门封(28)垫设于所述门体(27)与所述顶盖(1)之间以密封所述烹调腔。
  6. 根据权利要求1所述的微波饭煲，其中，所述腔体(2)包括防微波透射的金属圆柱板，该圆柱板的内筒腔形成为所述烹调腔，所述圆柱板的顶端周缘连接于所述顶盖(1)，所述圆柱板的底端周缘密封连接于所述底盖(5)的内侧壁，所述顶盖(1)和底盖(5)均为防微波透射的金属盖体。
  7. 根据权利要求6所述的微波饭煲，其中，所述内胆(20)的直径比所述圆柱板的直径至少小15mm。
  8. 根据权利要求1所述的微波饭煲，其中，该微波饭煲还包括周向壳体(17)和 底座(18)，所述腔体结构安装在所述底座(18)上，所述周向壳体(17)围绕所述腔体(2)设置，所述周向壳体(17)的顶端接合所述顶盖(1)且底端接合于所述底座(18)上。
  9. 根据权利要求8所述的微波饭煲，其中，所述底座(18)上还设有：
    变频器(21)，所述变频器(21)与所述微波发送机构的磁控管(11)电连接以调节该磁控管(11)的供电电压；和
    散热风扇(19)，所述散热风扇(19)用于对所述变频器(21)和所述微波发送机构进行散热。
  10. 根据权利要求1～9中任意一项所述的微波饭煲，其中，所述微波发送机构包括波导组件(6)和磁控管(11)，所述波导组件(6)包括横向部分和从该横向部分的端部向下延伸的下延部分，所述下延部分上安装有所述磁控管(11)，该磁控管(11)通过微波入口(12)向所述波导组件(6)内的微波传输腔(63)输入微波，所述横向部分设有微波出口(10)，所述底盖(5)的底部设有微波馈入口(9)，所述横向部分连接于所述底盖(5)的底部并使得所述微波出口(10)与所述微波馈入口(9)对接以将微波馈入所述烹调腔内。
  11. 根据权利要求10所述的微波饭煲，其中，所述波导组件(6)包括基底板(61)和盖板(62)，该盖板(62)呈“L”形并包括横向盖板(621)和纵向盖板(622)，所述基底板(61)呈“Z”形并依次包括第一横向底板(611)、下延板(612)和第二横向底板(613)，所述基底板(61)的外周缘均形成有底板翻边(614)，所述盖板(62)密封地罩盖在所述基底板(61)的底板翻边(614)上，以在所述基底板(61)与盖板(62)之间形成所述微波传输腔(63)；
    其中，所述横向盖板(621)设置在所述第一横向底板(611)的上方，以在所述横向盖板(621)与第一横向底板(611)之间形成所述微波传输腔(63)的横向腔室，所述纵向盖板(622)与所述下延板(612)横向间隔并且所述纵向盖板(622)的底端向下延伸至接合所述第二横向底板(613)，以在所述下延板(612)、第二横向底板(613)和纵向盖板(622)之间形成所述微波传输腔(63)的纵向腔室，所述微波出口(10)设置在所述横向盖板(621)上，所述微波入口(12)设置在所述纵向盖板(622)上。
  12. 根据权利要求11所述的微波饭煲，其中，该微波饭煲还包括下述特征1至特征8中的至少一个或全部：
    特征1：所述下延板(612)与所述纵向盖板(622)相互平行并且均竖直向下延伸；
    特征2：所述基底板(61)为弯折成型且翻边的单块板，所述波导组件(6)还包括用于从侧向密封所述微波传输腔(63)的角铁(13)，该角铁(13)安装在所述微波传输腔(63)的横向腔室与纵向腔室的拐角连通处的侧向的所述底板翻边(614)上；
    特征3：所述底板翻边(614)上设有焊接连接板(14)，所述盖板(62)焊接在所述焊接连接板(14)上；
    特征4：所述第一横向底板(611)的靠近所述下延板(612)的端部设有贯通的多个翻边孔(15)，该翻边孔(15)具有向下的周向翻边，该周向翻边的向下翻边高度不小于2mm；
    特征5：所述下延板(612)的内侧壁上还形成有与所述微波入口(12)位置相对的球面凹槽(16)，该球面凹槽(16)的外壁向外凸起以间隔开所述磁控管(11)的天线头；
    特征6：所述底盖(5)呈圆盘状，在该底盖(5)的径向上，所述波导组件(6)的外端部位于所述底盖(5)的外周边缘以内；
    特征7：所述纵向盖板(622)的纵向长度不大于所述磁控管(11)的纵向长度的1.5倍；
    特征8：所述微波传输腔(63)的所述纵向腔室与所述横向腔室的体积比不小于2。
  13. 根据权利要求2～9中任意一项所述的微波饭煲，其中，所微波饭煲还包括搅拌组件，该搅拌组件包括微波搅拌板(4)和搅拌电机(7)，所述微波搅拌板(4)呈圆盘形形状并设置在所述烹调腔底部的搁板(3)与所述底盖(5)之间，所述搅拌电机(7)安装在所述底盖(5)的下方并且该搅拌电机(7)的电机输出轴穿过所述底盖(5)与所述微波搅拌板(4)相连，所述微波搅拌板(4)由所述搅拌电机(7)驱动旋转以搅拌进入所述烹调腔内的微波。
  14. 根据权利要求13所述的微波饭煲，其中，所述微波搅拌板(4)的顶面上形成有沿弦A(41)向上翻折的弧弦部，该弧弦部包括倾斜反射平面(42)和上弧弦面(44)，所述倾斜反射平面(42)从所述上弧弦面(44)的弦B(43)倾斜向下且向内地延伸至所述顶面上的所述弦A(41)；所述弧弦部上还设有切口，该切口切除所述倾斜反射平面(42)的中间部分并在该中间部分处形成横向开孔(45)；
    所述微波搅拌板(4)的圆心(O)的一侧形成有所述弧弦部，另一侧设有竖向贯通的第一长方形孔(47)和第二长方形孔(48)，所述第一长方形孔(47)与第二长方形孔(48)的各自靠近端相互接近并呈夹角布置，所述第一长方形孔(47)的远端朝向所述弦A(41)的一端方向延伸，所述第二长方形孔(48)的远端朝向所述弦A(41)的另一端方向延伸；其中，所述第一长方形孔(47)和第二长方形孔(48)的靠近所述圆心(O)的长边上均形成有向上翻折的反射翻边(49)。
  15. 根据权利要求14所述的微波饭煲，其中，该微波饭煲还包括下述特征A至特征E中的至少一个或全部：
    特征A：所述切口为三角形切口，该切口的三角形底边与所述弦A(41)平行，三角形顶点(O’)与所述圆心(O)之间的连线垂直于所述弦A(41)和弦B(43)，所述三角形切口的两个侧边为切削边，该切削边从所述上弧弦面(44)向下切削至所述微波搅拌板(4)的顶面以形成所述横向开孔(45)；
    特征B：所述反射翻边(49)从靠近所述圆心(O)的所述长边的远端延伸至所述长边的中部；
    特征C：所述第一长方形孔(47)和第二长方形孔(48)之间呈直角夹角布置，所述第一长方形孔(47)和第二长方形孔(48)的沿各自长度方向上的中线的延长线能够交汇，且交汇点、所述圆心(O)以及所述三角形顶点(O’)处于同一直线上；
    特征D：所述倾斜反射平面(42)与所述顶面之间的平面夹角为145°～150°，所述倾斜反射平面(42)的高度不小于所述反射翻边(49)的高度；
    特征E：所述弦A(41)与所述圆心(O)之间的径向距离不小于0.3D，其中D为所述微波搅拌板(4)的直径长度。
  16. 根据权利要求13所述的微波饭煲，其中，所述搅拌组件还包括搅拌支架(8)，该搅拌支架(8)包括圆柱套筒和沿所述圆柱套筒的外周部的周向间隔布置且向外伸出的多个卡爪(81)，所述微波搅拌板(4)上设有中心安装孔和围绕该中心安装孔设置的多 个卡槽(46)，所述搅拌支架(8)的圆柱套筒插装于所述中心安装孔中，多个所述卡爪(81)分别卡扣于对应的所述卡槽(46)中；
    其中，所述圆柱套筒的底部形成有方形内孔，所述搅拌电机(7)包括方形输出轴(71)，该方形输出轴(71)嵌入所述方形内孔中。
PCT/CN2015/093576 2015-06-08 2015-11-02 微波饭煲 Ceased WO2016197527A1 (zh)

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