Heating cooker

Abstract

To obtain a heating cooker which can inhibit leakage of high frequency waves while maintaining ease of carrying an object to be cooked into / out from a heating chamber.SOLUTION: A heating cooker includes: a heating chamber having an opening; a door which rotationally moves to open or close the opening; a high frequency wave generation device which supplies electromagnetic waves to the heating chamber; and moving means which moves a tray to the inside or outside of the heating chamber. The moving means has: a pair of rails which is disposed outside the heating chamber and moves forward or backward; and a connection part which connects front parts of the pair of rails with each other and is located between the door and the heating chamber when the door is closed.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a cooking device that heats an object to be heated housed in a heating chamber. [Background technology]

[0002] There are known cooking appliances equipped with a high-frequency generator that supplies microwaves to a heating chamber. For example, the cooking appliance described in Patent Document 1 includes a table on which an object to be heated is placed, a drawer that holds the table and moves the table in and out of the heating chamber, and an opening / closing door that is attached to the drawer and opens and closes the heating chamber. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-201501 Summary of the Invention [Problem to be solved by the invention]

[0004] The cooking appliance described in Patent Document 1 has a door that slides along with the drawer body to open and close the heating chamber, allowing for easy insertion and removal of heated items into and from the heating chamber. However, rail structures for sliding the door generally tend to cause the door to rattle. Furthermore, if a user bumps into or accidentally touches the door, the door may open slightly even without intending to open it. While sliding doors are designed to open slightly, it is difficult to detect small gaps between the door and the heating chamber. Cooking appliances that generate high-frequency waves must stop generating the high-frequency waves when the door is open. However, because it is difficult to detect the gap between the door and the heating chamber, it is difficult to stop the high-frequency generator at the appropriate time. Therefore, measures to prevent high-frequency wave leakage are desired.

[0005] The present disclosure has been made against the backdrop of the above-mentioned problems, and aims to provide a heating cooker that can suppress leakage of high-frequency waves while maintaining ease of loading and unloading heated items into the heating chamber. [Means for solving the problem]

[0006] The heating cooker of the present disclosure comprises a heating chamber having an opening, a door that rotates to open and close the opening, a high-frequency generator that supplies electromagnetic waves to the heating chamber, and a moving means that moves a tray inside and outside the heating chamber, the moving means having a pair of rails that are positioned outside the heating chamber and move back and forth, and a connecting part that connects the front parts of the pair of rails and is located between the door and the heating chamber when the door is closed. [Effects of the Invention]

[0007] According to the present disclosure, the moving means for moving the tray makes it easy to put the heated object in and take it out of the heating chamber, and the rotating door makes it less likely to create a gap between it and the heating chamber, thereby suppressing leakage of high frequency waves. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing a state in which a cooking device 100 according to a first embodiment is installed. [Figure 2] 1 is a perspective view of a cooking device 100 according to a first embodiment with a top plate 1 removed. [Figure 3] 1 is a front perspective view of a heating chamber 20 and its peripheral members according to the first embodiment. FIG. [Figure 4] FIG. 2 is a perspective view of the heating chamber 20 and its peripheral members according to the first embodiment, as seen from behind. [Figure 5] 2 is a perspective view of the heating chamber 20 and its peripheral members according to the first embodiment, as seen from the front left. FIG. [Figure 6] 2 is a perspective view of the heating chamber 20 and its peripheral members according to the first embodiment, as seen from the front right. FIG. [Figure 7]1 is a perspective view of a tray 50 according to the first embodiment, seen from above. [Figure 8] 2 is a perspective view of the tray 50 according to the first embodiment, seen from below. FIG. [Figure 9] 1 is a schematic vertical cross-sectional view of a cooking device 100 according to a first embodiment, taken along the front-rear direction, with a door 21 closed. [Figure 10] 1 is a schematic vertical cross-sectional view of a cooking device 100 according to a first embodiment, taken along the front-rear direction, with a door 21 open. [Figure 11] 1 is a schematic longitudinal cross-sectional view of the cooking device 100 according to the first embodiment, taken along the front-rear direction, with the moving means 30 pulled out to the frontmost position. [Figure 12] FIG. 10 is a perspective view of a cooking device 100A according to a second embodiment. [Figure 13] FIG. 10 is a perspective view of a cooking device 100A according to a second embodiment with a top plate 1 removed. [Figure 14] FIG. 10 is a front perspective view of a heating chamber 20 and its peripheral members according to a second embodiment. [Figure 15] FIG. 10 is a perspective view of a heating chamber 20 and its peripheral members according to a second embodiment, as seen from behind. [Figure 16] FIG. 10 is a perspective view of a heating chamber 20 and its peripheral members according to a second embodiment. [Figure 17] FIG. 10 is a perspective view of a heating chamber 20 and its peripheral members according to a second embodiment. [Figure 18] FIG. 10 is a perspective view of a tray 50A according to a second embodiment, seen from above. [Figure 19] FIG. 10 is a perspective view of a tray 50A according to a second embodiment, seen from below. [Figure 20] FIG. 10 is a schematic vertical cross-sectional view of a cooking device 100 according to a second embodiment, taken along the front-rear direction, with a door 21 closed. [Figure 21] 1 is a schematic vertical cross-sectional view of a cooking device 100 according to a first embodiment, taken along the front-rear direction, with a door 21 open. [Figure 22] 10 is a schematic longitudinal cross-sectional view of the cooking device 100 according to the second embodiment, taken along the front-rear direction, in a state where a moving means 30A has moved to the maximum extent. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment in which a cooking device according to the present disclosure is applied to a built-in induction cooking device will be described below with reference to the drawings. The present disclosure is not limited to the following embodiments and can be modified in various ways without departing from the spirit of the present disclosure. The present disclosure also includes all possible combinations of the configurations shown in the following embodiments. The cooking device shown in the drawings is an example of an appliance to which the cooking device of the present disclosure is applied, and the appliances to which the present disclosure is applicable are not limited to the cooking device shown in the drawings. In the following description, directional terms (e.g., "up," "down," "right," "left," "front," "rear," etc.) are used as appropriate to facilitate understanding, but these are for explanatory purposes and do not limit the present disclosure. In each drawing, parts designated with the same reference numerals are identical or equivalent, and this applies throughout the entire specification. The relative dimensional relationships or shapes of the components in each drawing may differ from those in the actual appliances.

[0010] Embodiment 1 Fig. 1 is a diagram showing a state in which a cooking appliance 100 according to the first embodiment is installed. Fig. 1 shows a state in which the cooking appliance 100 is installed on a kitchen counter 200. The cooking appliance 100 is inserted into an installation hole provided in the kitchen counter 200. The dimensions of kitchen furniture are standardized by JIS A 0017, and commercially available kitchen furniture generally has dimensions that comply with this standard. The top surface of a kitchen counter 200 that complies with this standard is set to 80, 85, 90, or 95 cm.

[0011] The cooking appliance 100 has a top plate 1 placed on a kitchen counter 200. The top plate 1 is provided with one or more heating ports 3, one or more operating units 4, and one or more display units 5. The heating ports 3 indicate the position where a pot is placed. The heating ports 3 are formed by printing or embossing on the top plate 1. The operating unit 4 is an input device that accepts inputs regarding heating conditions such as heating temperature or heating time, and operation instructions such as starting or stopping heating. The operating unit 4 is formed by hardware buttons or a touch panel, etc. The display unit 5 displays information regarding settings such as the heating menu or heating conditions of the cooking appliance 100, as well as the operating status of the cooking appliance 100. The display unit 5 is formed by, for example, an LCD display or a lamp, etc. The operating unit 4 and the display unit 5 may be provided on the front of the cooking appliance 100. An exhaust port cover 7 is provided behind the top plate 1.

[0012] A heating chamber 20 is provided below the top plate 1 of the cooking device 100. The heating chamber 20 is a chamber in which an object to be heated, such as foodstuffs, placed inside is heated by high frequency waves. A door 21 for opening and closing the heating chamber 20 is provided on the front side of the heating chamber 20. A door grip 22 that a user grips when opening or closing the door 21 is provided on the top of the door 21.

[0013] Here, because the door 21 is positioned below the height of the top surface of the kitchen counter 200 that complies with the above-mentioned standards, the user must move their eyes closer to the door 21 when putting or taking out an item to be heated in the heating chamber 20. Specifically, the user must change their posture, for example, by bending over from an upright position, which places a great physical burden on the user. Furthermore, even if the heating chamber 20 is not part of an integrated cooking device 100 but is configured to function as a cooking device on its own, a similar burden may arise depending on where the heating chamber 20 is placed. For this reason, the cooking device 100 of this embodiment employs a configuration that reduces this burden, as will be described later.

[0014] Fig. 2 is a perspective view of the cooking device 100 according to the first embodiment with the top plate 1 removed. A heating chamber 20 is provided inside the main body 2 of the cooking device 100. An air intake 6 is formed in the wall of the main body 2, which serves as an inlet for cooling air to flow into the main body 2. A main body exhaust vent 8 is provided at the rear of the main body 2. The main body exhaust vent 8 is an outlet for air exhausted from the main body 2. A heating means 10, a drive circuit 11, a control means 12, and a cooling fan 13 are provided inside the main body 2.

[0015] Heating means 10 is provided at a position opposite heating port 3 (see FIG. 1) below top plate 1 (see FIG. 1), and heats a pot or the like placed on top plate 1. Heating means 10 in this embodiment is a heating coil that inductively heats the pot, but it may also be an electric heater or a gas stove.

[0016] The driving circuit 11 has an inverter circuit that supplies a high frequency current to the heating means 10, which is a heating coil. The driving circuit 11 is controlled by the control means 12.

[0017] The control means 12 controls each component of the cooking appliance 100. The control means 12 is configured with hardware such as a circuit device that realizes its functions. Alternatively, the control means 12 has a memory that stores programs and a CPU (Central Processing Unit), and the functions of the control means 12 are realized by the CPU executing the programs. Note that the control means 12 shown in FIG. 2 is housed in a circuit board case.

[0018] Cooling fan 13 blows out cooling air to cool heat-generating components such as heating means 10, which is a heating coil, drive circuit 11, and control means 12. In this embodiment, cooling fan 13 is disposed below heating means 10. When cooling fan 13 operates, air flows into main body 2 from intake port 6, and the air sucked into cooling fan 13 is blown into main body 2 as cooling air. The cooling air blown into main body 2 cools heating means 10 and the like, and then flows out from main body exhaust port 8.

[0019] An opening 24 is provided in the front of the heating chamber 20, and a door 21 opens and closes the opening 24. The door 21 rotates to open and close the opening 24. In this embodiment, the door 21 is hinged, with a rotation shaft (not shown) extending in the left-right direction of the heating chamber 20 provided at the bottom of the door 21, and the door 21 rotates up and down around the rotation shaft. When the door 21 is closed, the flat surface faces vertically, and when it is fully open, the flat surface faces horizontally. This type of rotating door 21 is difficult to open even if the user accidentally bumps into it, and unintentional opening can be prevented.

[0020] The cooking appliance 100 is provided with a door open / close detection means 23 that detects the open / close state of the door 21. In this embodiment, the door open / close detection means 23 includes one or more switches 231 provided on the main body 2 and one or more protrusions 232 provided on the inner surface of the door 21. The protrusions 232 are positioned so that the switches 231 are pressed when the door 21 is closed. The switches 231 are switched between an on and off state depending on whether they are pressed by the protrusions 232, and the open / close state of the door 21 is detected based on the on and off states of the switches 231. In this embodiment, two sets of switches 231 and protrusions 232 are provided at different vertical positions, which improves the detection accuracy of the open / close state of the door 21 compared to when a single set of switches 231 and protrusions 232 is provided, and enhances fail-safe performance against malfunctions or malfunctions. Note that the door open / close detection means 23 may include one or more sets of switches 231 and protrusions 232. Furthermore, the door open / close detection means 23 is not limited to a configuration that mechanically detects the open / closed state of the door 21 as in this embodiment, but may be a configuration that electrically detects the open / closed state of the door 21.

[0021] In FIG. 2, a moving means 30 is provided inside the heating chamber 20 to move the tray 50 inside and outside the heating chamber 20. The moving means 30 shown in FIG. 2 is positioned at its rearmost position, with the entire tray 50 housed inside the heating chamber 20. The moving means 30 includes a grip 31 that is held by the user when moving the moving means 30. When the moving means 30 is positioned at its rearmost position, the grip 31 is located outside the heating chamber 20, allowing the user to hold the grip 31 without inserting their hand into the heating chamber 20. The grip 31 in this embodiment has a shape that protrudes forward like a canopy from above the opening 24 of the heating chamber 20. When the door 21 is closed, the grip 31 is positioned above the door grip 22, as shown in FIG. 1.

[0022] An opening 34 is provided in the center of the moving means 30 when viewed from the front. The opening 34 is covered by the door 21 when the door 21 is closed. When the moving means 30 is not pulled out, the user can put objects to be heated into and take them out of the heating chamber 20 through the opening 34. For example, relatively small cooking containers and ingredients can be put into and taken out of the heating chamber 20 through the opening 34 without pulling out the moving means 30, which is convenient for the user.

[0023] Fig. 3 is a perspective view from the front of the heating chamber 20 and its peripheral members according to the first embodiment. Fig. 4 is a perspective view from the rear of the heating chamber 20 and its peripheral members according to the first embodiment. The heating chamber 20 has an internal space formed by a metal ceiling 201, a right side wall 202, a left side wall 203, a rear wall 204, and a bottom 205. A high-frequency generator 40 is disposed to the right of the right side wall 202, and a waveguide 41 and an antenna rotation means 45 are disposed behind the rear wall 204. An upper heating means 48 is disposed above the ceiling 201, and a lower heating means 49 is disposed below the bottom 205 of the heating chamber 20.

[0024] The radio frequency generator 40 generates high-frequency electromagnetic waves. The frequency band of the electromagnetic waves generated by the radio frequency generator 40 is assumed to be high frequencies including microwaves. The radio frequency generator 40 has a semiconductor oscillator or magnetron as an oscillator. The semiconductor oscillator has a wide bandgap semiconductor such as gallium nitride (GaN) or a laterally diffused metal oxide semiconductor (LDMOS) and generates microwaves at a frequency of approximately 2.45 GHz. While the frequency of electromagnetic waves generated by a magnetron ranges between approximately 2.45 and 0.2 GHz, the frequency of electromagnetic waves generated by a semiconductor oscillator is stable with almost no fluctuation around 2.45 GHz. Furthermore, a semiconductor oscillator differs from a magnetron in that its frequency can be variably controlled. By employing a semiconductor oscillator in the radio frequency generator 40, the phase of the generated electromagnetic waves can be precisely controlled. This allows for precise temperature control of food irradiated with electromagnetic waves. In the following description, the high frequency generator 40 is a magnetron.

[0025] The waveguide 41 propagates the electromagnetic waves generated by the high frequency generator 40. The waveguide 41 is attached to the rear surface of the rear wall 204, and extends from the high frequency generator 40 to near the center of the rear wall 204 in the left-right direction.

[0026] Antenna rotation means 45 rotates antenna 44 (see FIG. 6). Antenna rotation means 45 includes a rotation shaft connected to antenna 44 and an electric motor such as a stepping motor that rotates the rotation shaft.

[0027] The upper heating means 48 is a heating device that heats the heating chamber 20 from above. The lower heating means 49 is a heating device that heats the heating chamber 20 from below. In this embodiment, the upper heating means 48 and the lower heating means 49 are flat heaters such as mica heaters. The upper heating means 48 and the lower heating means 49 may be any device capable of heating the heating chamber 20, including sheath heaters, glass tube heaters, ceramic heaters, or induction heating coils. The upper heating means 48 is attached in contact with the upper surface of the ceiling 201 and heats the heating chamber 20 through the ceiling 201. By bringing the upper heating means 48 into contact with the ceiling 201 that forms the upper surface of the heating chamber 20, heat is transferred from the entire upper surface of the heating chamber 20 to the air, thereby improving heating efficiency. Because the upper heating means 48 is not exposed to the heating chamber 20, it is not contaminated by oily smoke or liquids generated within the heating chamber 20. Furthermore, the inner surface of the ceiling 201 is flat, making the heating chamber 20 easy to clean. Although this embodiment shows an example in which upper heating means 48 is provided on the upper surface of ceiling 201, upper heating means 48 may also be provided on the lower surface of ceiling 201, i.e., on the upper inner surface of heating chamber 20. In this way, heat loss from upper heating means 48 can be suppressed and heating efficiency can be improved.

[0028] 3 and 4, the moving means 30 is in the forwardmost position, pulled out from the heating chamber 20. The moving means 30 includes a pair of left and right rails 32 and a frame member 33 connected below the gripping portion 31.

[0029] The rail 32 extends in the front-rear direction, and its front end is connected to the lower end of the frame member 33. A pair of rail receiving portions 25 is provided on the outer surfaces of the right side wall 202 and the left side wall 203 of the heating chamber 20, respectively. The rail receiving portions 25 are elongated members extending in the front-rear direction, and the rail 32 is engaged with the rail receiving portions 25. The rail 32 slides along the rail receiving portions 25 while engaged with the rail receiving portions 25. The rail receiving portions 25 are disposed outside the heating chamber 20, and the rail 32 is also disposed outside the heating chamber 20. If the moving means 30, including the rail 32, were disposed inside the heating chamber 20, the high frequency waves generated by the high frequency generator 40 could cause sparks to occur in the moving means 30 due to a local increase in electric field strength. However, by disposing the moving means 30 outside the heating chamber 20 as in this embodiment, such sparks can be suppressed. When the user moves the gripping portion 31 in the forward and backward directions, the rail 32 moves forward and backward along the rail receiving portion 25, and the tray 50 supported by the moving means 30 also moves forward and backward. As will be described in detail later, in this embodiment, wheels 54 (see Figures 4, 7, and 8) are provided on the underside of the tray 50, which facilitates the movement of the tray 50 as the moving means 30 moves forward and backward.

[0030] The frame member 33 is a rectangular frame-shaped member and includes a connecting portion 331, a pair of left and right pillar portions 332, and an upper portion 333. The connecting portion 331 forms one lower side of the frame member 33 and connects the front portions of the pair of rails 32. In the present embodiment, the front ends of the pair of rails 32 are connected by the connecting portion 331, but the position of the connecting portion 331 in the longitudinal direction of the pair of rails 32 is not limited thereto. For example, the front ends of the rails 32 may protrude forward beyond the connecting portion 331. The pair of pillar portions 332 extend upward from the left and right ends of the connecting portion 331, respectively. The upper portion 333 connects the upper ends of the pair of pillar portions 332. The grip portion 31 extends forward from the upper portion 333. The area surrounded by the connecting portion 331, the pair of pillar portions 332, and the upper portion 333 is an opening 34.

[0031] Because the frame member 33 connected to the gripping portion 31 of the moving means 30 has the opening 34 as described above, heat transferred from the tray 50 to the moving means 30 is easily released from the frame member 33 and is not easily transferred to the gripping portion 31. In this way, the gripping portion 31 can be prevented from becoming too hot, making it easier for the user to grip the gripping portion 31 after heating in the heating chamber 20.

[0032] Furthermore, grip portion 31 of the present embodiment is a flat plate-shaped member having opening 311 formed therein. Providing opening 311 promotes heat dissipation from grip portion 31, making it easier for the user to grip grip portion 31 after heating in heating chamber 20.

[0033] The gripping portion 31 and the frame member 33 may be made of a material having a lower thermal conductivity than the material that constitutes the wall of the heating chamber 20. This makes it possible to prevent the gripping portion 31 from becoming too hot.

[0034] Either or both of the gripping portion 31 and the frame member 33 may be provided with a heat insulating means made of a material with lower thermal conductivity than the material constituting the walls of the heating chamber 20. Examples of such heat insulating means include glass wool or rock wool. Either or both of the gripping portion 31 and the frame member 33 may be provided with a heat insulating means made of a material with higher reflectivity than the material constituting the walls of the heating chamber 20. Examples of such heat insulating means include ceramic coating materials. Either or both of the gripping portion 31 and the frame member 33 may be provided with a radio wave absorbing means for absorbing radio waves. The radio wave absorbing means may be made of a material containing, for example, carbon particles, soft ferrite (e.g., spinel type, such as Ni-Zn or Mn-Zn) particles, hard ferrite particles (e.g., hexagonal), or soft magnetic metal particles, or may be coated with such a material. Alternatively, a thin insulating dielectric film may be provided with a large number of pattern elements, which are conductors that resonate at a specific frequency, to function as resonant antenna elements for incident electromagnetic waves and control the reflection and re-radiation of electromagnetic waves. By providing at least one of such heat insulating means and radio wave absorbing means, the temperature of the grip portion 31 can be prevented from rising too high.

[0035] In this embodiment, the gripping portion 31 and the frame member 33 are placed on a flat plate-like member on the front surface of the heating chamber 20, in which the opening 24 is formed. However, a frame-shaped groove may be provided in the flat plate-like member in which the opening 24 is formed, and part or all of the frame member 33 may be inserted into the groove.

[0036] Fig. 5 is a perspective view of the heating chamber 20 and its peripheral members according to embodiment 1, viewed from the front left. Fig. 6 is a perspective view of the heating chamber 20 and its peripheral members according to embodiment 1, viewed from the front right. Figs. 5 and 6 show a state in which the tray 50 has been removed from the moving means 30. Fig. 5 shows a state in which the moving means 30 has been moved to the frontmost position, and Fig. 6 shows a state in which the moving means 30 has been moved to the rearmost position.

[0037] 5, power feed port cover 43 is provided on rear wall 204. Power feed port cover 43 is made of a material, such as ceramic, that has high electromagnetic wave transmittance and low electromagnetic wave absorption, and is highly heat-resistant enough to withstand the cooking temperature in heating chamber 20.

[0038] When feed port cover 43 is removed, antenna 44 is provided inside feed port 42 formed in rear wall 204, as shown in Fig. 6. Antenna 44 radiates electromagnetic waves propagated through waveguide 41 into heating chamber 20. Antenna 44 is rotated by antenna rotation means 45. During heating operation by high frequency generator 40 in heating chamber 20, the rotation and stopping of antenna 44 is controlled based on a predetermined control sequence.

[0039] The moving means 30 is provided with a tray engagement portion 35. The tray engagement portion 35 is located between the pair of rails 32 and behind the frame member 33. The tray engagement portion 35 is a flat member with a horizontal flat surface and has an opening that penetrates vertically. A part of the tray 50 (engagement portion 53, see Figure 8) is inserted into the opening of this tray engagement portion 35. The engagement structure between the tray 50 and the moving means 30 is not limited to this embodiment, and may be any configuration that allows the tray 50 to be detachably supported by the moving means 30. For example, the tray 50 and the moving means 30 may be integrated with screws. Alternatively, the tray 50 and the moving means 30 may be integrated with an adhesive, although this results in a non-detachable configuration.

[0040] As shown in FIG. 6 , when the moving means 30 is moved all the way to the rear, the tray engagement portion 35 is located inside the heating chamber 20, but the other components, including the rail 32, are located outside the heating chamber 20. By locating most of the components constituting the moving means 30 outside the heating chamber 20 in this way, it is possible to prevent the moving means 30 from becoming too hot and to suppress deterioration due to heating, such as seizure. Furthermore, the lower heating means 49 is not located below the tray engagement portion 35, but is located behind the tray engagement portion 35. This configuration also prevents the moving means 30 from becoming too hot and deteriorating. In this way, suppressing the moving means 30 from becoming too hot and deteriorating extends the life of the moving means 30 and reduces the burden of maintenance and part replacement.

[0041] Fig. 7 is a perspective view from above of tray 50 according to embodiment 1. Fig. 8 is a perspective view from below of tray 50 according to embodiment 1. Figs. 7 and 8 show a state in which one wheel 54 and wheel holder 55 have been removed from tray 50. Tray 50 of this embodiment is a square tray and has a shape that covers the entire bottom 205 of heating chamber 20 when placed in heating chamber 20.

[0042] Wheels 54 are provided on the underside 51 of the tray 50. In this embodiment, a pair of wheels 54 are detachably attached to the left and right rear portions of the underside 51 via wheel holders 55. The wheels 54 rotate in the front-to-rear direction and come into contact with the bottom 205 of the heating chamber 20 (see Figures 9 to 11), and are a movement promoting means that promotes movement of the tray 50 in the front-to-rear direction. The rotation axis of the wheels 54 is attached to the wheel holders 55. The wheels 54 may be spherical wheels.

[0043] A downwardly protruding projection 52 is provided at the rear of the lower surface 51, and a hole formed in the upper surface of the wheel holder 55 fits into this projection 52. The wheel 54 is detachably attached to the tray 50 by the projection 52 and the wheel holder 55. The wheel holder 55 may be attached to the tray 50 with screws, adhesive, or the like.

[0044] A downwardly protruding engagement portion 53 is provided at the front of the underside 51 of the tray 50. The engagement portion 53 has an elongated shape extending left and right, and is inserted into the tray engagement portion 35 (see FIGS. 5 and 6).

[0045] In this embodiment, the protrusions 52 and the engagement portions 53 are provided on the underside 51 of the flange portion of the tray 50, and are positioned higher than the underside 51 of the container portion located inside the flange portion of the tray 50. This configuration reduces the distance between the underside 51 of the container portion located inside the flange portion of the tray 50 and the bottom 205 (see Figure 6, etc.), thereby improving the heating efficiency of the tray 50 by the lower heating means 49.

[0046] 9 is a schematic longitudinal cross-sectional view of the cooking device 100 according to the first embodiment, taken along the front-rear direction, with the door 21 closed. When the door 21 is closed, the grip 31 of the moving means 30 is located outside the heating chamber 20 and above the door grip 22. In this embodiment, the flat surface of the grip 31 is superimposed on the upper surface of the door grip 22. Therefore, the door grip 22 and the grip 31 have an integrated appearance, resulting in a design that gives a neat impression. Furthermore, because the grip 31 is superimposed on the door grip 22, the user cannot pull out only the grip 31 when the door 21 is closed, thereby reducing the risk of accidentally pulling out the moving means 30.

[0047] When the door 21 is closed and food is placed on the tray 50, and a command to start heating is input to the operation unit 4 (see FIG. 1), cooking begins in the heating chamber 20. The control means 12 (see FIG. 2) operates one or more of the high-frequency generator 40, upper heating means 48, and lower heating means 49 in accordance with the input heating conditions or cooking menu, and heats the food in the heating chamber 20.

[0048] The lower heating means 49 is not disposed below the engaging portion 53 and wheels 54 of the tray 50, but is provided between the engaging portion 53 and wheels 54 in the front-to-rear direction. The container portion of the tray 50 is disposed above the lower heating means 49, and the object to be heated placed on the container portion can be efficiently heated by the lower heating means 49.

[0049] Fig. 10 is a schematic longitudinal cross-sectional view of the cooking device 100 according to the first embodiment, taken along the front-rear direction, with the door 21 open. In Fig. 10, the moving means 30 is positioned at the rearmost position, and the entire tray 50 is housed in the heating chamber 20. In this state, the user can put an object to be heated into or take it out of the tray 50 in the heating chamber 20 through the opening 34 of the moving means 30 (see Fig. 3).

[0050] 11 is a schematic longitudinal cross-sectional view of the cooking device 100 according to the first embodiment, taken along the front-rear direction, with the moving means 30 pulled out to the frontmost position. When the moving means 30 is pulled out, the majority of the tray 50 supported by the moving means 30 is positioned outside the heating chamber 20. The user can put ingredients in and take them out of the tray 50 that has been pulled out from the heating chamber 20. By pulling the tray 50 out of the heating chamber 20, even relatively large ingredients or cooking containers can be easily placed in and removed from the tray 50.

[0051] 9, when the door 21 is closed and heating is being performed in the heating chamber 20, the handle 31 is located outside the heating chamber 20 and is therefore less likely to become hot. Therefore, after cooking, when pulling out the moving means 30 from the heating chamber 20 as shown in FIG. 11, the user can easily grip the handle 31.

[0052] As described above, the cooking device 100 of this embodiment includes the heating chamber 20 having the opening 24, the door 21 that rotates to open and close the opening 24, the high frequency generator 40 that supplies electromagnetic waves to the heating chamber 20, and the moving means 30 that moves the tray 50 in and out of the heating chamber 20. The moving means 30 includes a pair of rails 32 that are disposed outside the heating chamber 20 and move back and forth, and a connecting portion 331 that connects the front portions of the pair of rails 32 and is located between the door 21 and the heating chamber 20 when the door 21 is closed.

[0053] Door 21 rotates to open and close heating chamber 20, so it is less likely to rattle or be slightly open compared to a sliding door, thereby suppressing leakage of high frequency waves from heating chamber 20. Furthermore, moving means 30, which moves tray 50 in and out of heating chamber 20, slides, making it easy for the user to put ingredients in and take them out of heating chamber 20.

[0054] Embodiment 2 In this embodiment, a cooking device 100A will be described that includes a moving means 30A and a tray 50A that are different from those in embodiment 1. In this embodiment, the differences from embodiment 1 will be mainly described.

[0055] Fig. 12 is a perspective view of a cooking device 100A according to embodiment 2. In cooking device 100A, handle 31 (see Fig. 1) shown in embodiment 1 is not placed on door handle 22, and the configuration of moving means 30A is not exposed to the outside of cooking device 100A.

[0056] 13 is a perspective view of the cooking device 100A according to the second embodiment with the top plate 1 removed. In this embodiment as well, the door 21 of the heating chamber 20 rotates to open and close the opening 24. When the door 21 is open, the connection part 331A of the moving means 30A is located below the opening 24, allowing the user to see and grasp the connection part 331A. In this embodiment, the connection part 331A is placed on a flat plate-like member on the front surface of the heating chamber 20 in which the opening 24 is formed, but a groove may be provided in the flat plate-like member in which the opening 24 is formed, and part or all of the connection part 331A may be inserted into the groove.

[0057] Fig. 14 is a perspective view from the front of the heating chamber 20 and its peripheral members according to embodiment 2. Fig. 15 is a perspective view from the rear of the heating chamber 20 and its peripheral members according to embodiment 2. In Figs. 14 and 15, the moving means 30A is drawn out from inside the heating chamber 20 and is positioned at the frontmost position. As in embodiment 1, the rails 32 are arranged outside the heating chamber 20.

[0058] The connection portion 331A connects the front portions of the pair of rails 32. Although the illustration shows the front ends of the pair of rails 32 connected by the connection portion 331A, the position of the connection portion 331A in the longitudinal direction of the pair of rails 32 is not limited thereto, and the front ends of the rails 32 may protrude forward of the connection portion 331A.

[0059] 15, tray 50A is provided with sliding members 56A as a movement promoting means for promoting movement of tray 50A in the front-rear direction. Sliding members 56A are a configuration that replaces wheels 54 in the first embodiment, and will be described in detail later.

[0060] Fig. 16 is a perspective view of heating chamber 20 and its peripheral members according to embodiment 2. Fig. 16 shows a state in which tray 50A has been removed from moving means 30A, with moving means 30A in the forward-most position. In this embodiment, tray engaging portion 35 is provided behind connecting portion 331A.

[0061] The moving means 30A of this embodiment includes a driving device 36A and a power transmission unit 37A, and electrically moves the rail 32 and the tray 50A supported by the moving means 30A. The driving device 36A has an electric motor, such as a stepping motor, equipped with a rotating shaft. The power transmission unit 37A is, for example, a pinion gear that can rotate horizontally. The rail 32 is provided with, for example, a rack gear (not shown), and the pinion gear of the power transmission unit 37A is mated with the rack gear of the rail 32. When the driving device 36A operates, the pinion gear of the power transmission unit 37A rotates, and this rotation is transmitted to the rail 32 via the rack gear, moving the rail 32. Depending on the direction of rotation of the driving device 36A, the rail 32 moves forward or backward. In this embodiment, only the left rail 32 is provided with a drive unit 36A and a power transmission unit 37A, and as the left rail 32 moves, the right rail 32 connected to the left rail 32 via a connection unit 331A also slides. Note that both the left and right rails 32 may be provided with drive units 36A and power transmission units 37A, which eliminates imbalance that may occur when a drive unit 36A or the like is provided on only one side, allowing the moving means 30A to move more smoothly.

[0062] The driving device 36A detects the direction and amount of rotation of the rotating shaft, i.e., the direction and amount of movement of the rail 32, by detecting pulses accompanying the rotation of the rotating shaft. The direction and amount of movement detected by the driving device 36A are input to the control means 12, which controls the operation of the driving device 36A based on the input information and moves the movement means 30A to a predetermined position. Note that instead of or in addition to the driving device 36A, a device for detecting the direction and amount of movement of the rail 32 may be provided. By providing multiple devices for detecting the direction and amount of movement of the rail 32, the position of the rail 32 can be detected more accurately.

[0063] Limit switches may be provided at both ends of the movement range of the rail 32, and the control means 12 may stop the operation of the drive device 36A when it detects based on the output from the limit switches that the rail 32 is about to exceed the movement range. In this way, it is possible to prevent malfunction of the movement means 30, which would otherwise occur if the movement range were to exceed a predetermined movement range.

[0064] FIG. 17 is a perspective view of the heating chamber 20 and its peripheral components according to the second embodiment. FIG. 17 shows the state in which the moving means 30A is in the rearmost position. The connection portion 331A of the moving means 30A overlaps the lower edge of the opening 24 of the heating chamber 20. The tray engagement portion 35 is located within the heating chamber 20. As in the first embodiment, the lower heating means 49 is not disposed below the tray engagement portion 35, but is disposed behind the tray engagement portion 35. This configuration prevents the moving means 30A from becoming too hot and from deteriorating. In this embodiment, the rail 32 is moved by an electric drive unit 36A, and by preventing the moving means 30A from becoming too hot, it is possible to prevent the drive unit 36A from becoming too hot due to heat transfer, and the resulting malfunction and deterioration of the components.

[0065] Fig. 18 is a perspective view from above of tray 50A according to embodiment 2. Fig. 19 is a perspective view from below of tray 50A according to embodiment 2. Figs. 18 and 19 show a state in which one sliding member 56A has been removed from tray 50A.

[0066] The tray 50A includes a pair of left and right sliding members 56A instead of the wheels 54 and wheel holders 55 of the first embodiment. The sliding members 56A are detachably attached to the underside 51 of the tray 50A. The sliding members 56A contact the bottom 205 of the heating chamber 20 (see FIGS. 20 to 22) and serve as a movement promoting means for promoting the movement of the tray 50A in the front-to-rear direction. In this embodiment, the sliding members 56A are low-friction members. The sliding members 56A are made of a material that exhibits low friction resistance between the bottom 205 and the sliding members, such as fluororesin. The sliding members 56A may be made by molding fluororesin, or the surface of a member made of another material may be coated with a fluororesin. The sliding members 56A are not limited to fluororesin, and may be made of other low-friction materials that are heat-resistant enough to withstand the temperatures used during cooking.

[0067] A hole is formed in the upper surface of sliding member 56A, and protrusion 52 provided on lower surface 51 fits into the hole in sliding member 56A, making sliding member 56A detachable from tray 50A. This makes it easy to replace sliding member 56A if it deteriorates. Note that sliding member 56A may also be attached to tray 50A with screws, adhesive, or the like.

[0068] Fig. 20 is a schematic longitudinal cross-sectional view of the cooking device 100 according to embodiment 2, taken along the front-rear direction, with the door 21 closed. When the door 21 is closed, the tray 50A supported by the moving means 30A is located inside the heating chamber 20. The moving means 30A is entirely located inside the door 21. Although the connecting portion 331 is not visible in Fig. 20, the connecting portion 331 is located in the position shown in Fig. 17, i.e., between the door 21 and the heating chamber 20.

[0069] The cooking operation in heating chamber 20 is carried out in the same manner as in the first embodiment.

[0070] FIG. 21 is a schematic longitudinal cross-sectional view of the cooking device 100 according to the first embodiment, taken along the front-rear direction, with the door 21 open. In this embodiment, when the door 21 is opened, the moving means 30A automatically moves the tray 50A. Specifically, the control means 12 controls the drive device 36A based on the detection result of the door open / close detection means 23. As shown in FIG. 21, when the door open / close detection means 23 detects that the door 21 is fully open in a horizontal orientation, the control means 12 moves the rail 32 from rear to front. In this manner, the user can move the moving means 30A and expose the tray 50A from the heating chamber 20 simply by performing an operation to open the door 21, thereby improving user convenience.

[0071] The movement distance of the moving means 30A is preferably set so that the front end of the moving means 30A does not exceed the front end of the door 21. In other words, the moving means 30A protrudes from the heating chamber 20 within the range that the door 21, when rotated and opened, protrudes from the front of the cooking appliance 100A. This prevents contact and collision between the moving means 30A and the tray 50A when a person or object is in front of the cooking appliance 100A. This prevents liquids and other items from spilling or cooking vessels from tipping over due to vibrations caused by the moving means 30A or tray 50 colliding with a person or object. In the example of FIG. 21 , the connecting portion 331A, which is the front end of the moving means 30A in this embodiment, is aligned in the front-to-back direction with the front of the door handle portion 22, which is the front end of the door 21. This allows the tray 50A to be exposed from the heating chamber 20 to the maximum extent possible while avoiding a user's collision with the tray 50A. This allows the user to easily remove cooking vessels or containers from above, improving cooking operability.

[0072] Note that the control means 12 may operate the drive device 36A when the door open / close detection means 23 detects that the door 21 has changed from the closed state to the open state and when a movement instruction to move the moving means 30A forward is input to the operation unit 4 (see FIG. 12). That is, after the door 21 opens, the moving means 30A moves at a timing designated by the user. In this way, the tray 50A can be exposed from the heating chamber 20 at a timing desired by the user.

[0073] Furthermore, when the door open / close detection means 23 detects that the door 21 is in the closed state, the control means 12 does not operate the drive device 36A. Even if a movement command is input from the operation unit 4 when the door 21 is in the closed state, the control means 12 does not operate the drive device 36A. In this manner, it is possible to prevent the door 21 from opening unintentionally due to the movement means 30 colliding with the door 21, and to prevent damage due to overload caused by forcibly operating the drive device 36A.

[0074] Fig. 22 is a schematic longitudinal cross-sectional view of the cooking device 100 according to embodiment 2, taken along the front-rear direction, in a state where the moving means 30A has moved to the maximum extent. Fig. 22 shows a state where the moving means 30A has moved further forward from the state shown in Fig. 21. The movement of the moving means 30A can be automatic or manual, as will be described next.

[0075] Automatic movement will now be described. When a movement instruction to move the moving means 30A forward is input to the operation unit 4 (see FIG. 12), the control means 12 operates the drive unit 36A to move the moving means 30A to the maximum position. Alternatively, the drive unit 36A may be operated continuously while an operation input is being input to the operation unit 4, and the operation of the drive unit 36A may be stopped when the operation input is stopped. However, even in this case, the moving means 30A moves within a range that does not exceed the maximum position. If a movement instruction is input to the operation unit 4 when the moving means 30A has reached the maximum position, the control means 12 will not operate the drive unit 36A. By moving the moving means 30A to a position desired by the user, for example, when removing a large cooking container, the tray 50A can be placed in a position that makes it easy to remove it.

[0076] Manual movement will now be described. The user can move the moving means 30A by grasping the connection part 331A of the moving means 30A and pulling it toward themselves. The connection part 331A should have a structure that allows the user to hook their finger. For example, as shown in FIGS. 21 and 22, a gap that allows the user to insert their finger should be provided behind the connection part 331A. By configuring the moving means 30A to be manually movable in this way, the user can move the moving means 30A even if the drive device 36A does not operate due to, for example, a power outage or a malfunction.

[0077] Various aspects of the present disclosure are summarized below as appendices.

[0078] (Appendix 1) a heating chamber having an opening; a door that rotates to open and close the opening; a high frequency generator for supplying electromagnetic waves to the heating chamber; a moving means for moving the tray into and out of the heating chamber, The moving means is a pair of rails disposed outside the heating chamber and moving back and forth; a connecting portion that connects the front portions of the pair of rails and is positioned between the door and the heating chamber when the door is closed; Heating cooker. (Appendix 2) The moving means is a gripping portion connected to the connecting portion and positioned outside the door when the door is closed; 1. A cooking appliance as described in Appendix 1. (Appendix 3) The moving means is a frame member having an opening facing the opening, One side of the frame member is the connection portion. 1. A cooking device according to claim 1 or 2. (Appendix 4) The gripping portion is a heat insulating means made of a material having a lower thermal conductivity than the material constituting the wall of the heating chamber; a heat insulating means made of a material having a higher reflectivity than the material constituting the walls of the heating chamber; and a radio wave absorbing means for absorbing radio waves; Equipped with one or more of Attachment 2: A cooking appliance. (Appendix 5) The frame member is a heat insulating means made of a material having a lower thermal conductivity than the material constituting the wall of the heating chamber; a heat insulating means made of a material having a higher reflectivity than the material constituting the walls of the heating chamber; and a radio wave absorbing means for absorbing radio waves; Equipped with one or more of 2. A cooking appliance as described in Appendix 3. (Appendix 6) The moving means is An electric drive unit is provided to move the pair of rails. A cooking device according to any one of Supplementary Notes 1 to 5. (Appendix 7) a door open / close detection means for detecting the open / close state of the door; a control means for controlling the drive device based on a detection result of the door opening / closing detection means, When it is detected that the door has changed from a closed state to an open state, the control means controls the drive device to move the pair of rails from rear to front within a range in which the front end of the moving means does not exceed the front end of the door in the open state. 6. A cooking appliance as described in Appendix 6. (Appendix 8) an operation unit that receives an instruction to move the tray into the heating chamber; When the operation unit receives the movement instruction, the control unit moves the pair of rails from front to rear. 7. A cooking appliance as described in Appendix 7. (Appendix 9) the moving means includes a tray engaging portion with which the tray disposed between the pair of rails is engaged, The underside of the tray is provided with a movement promoting means that contacts the bottom of the heating chamber and promotes the movement of the tray. A cooking device according to any one of Supplementary Notes 1 to 8. (Appendix 10) The means for promoting movement is a wheel. 9. A cooking appliance as described in Appendix 9. (Appendix 11) The movement promoting means is a low-friction member. 9. A cooking appliance as described in Appendix 9. (Appendix 12) The movement promoting means is detachably attached to the tray. 12. The cooking device according to any one of Supplementary Notes 9 to 11. [Explanation of symbols]

[0079] 1 top plate, 2 main body, 3 heating port, 4 operation unit, 5 display unit, 6 air intake, 7 exhaust port cover, 8 main body exhaust port, 10 heating means, 11 drive circuit, 12 control means, 13 cooling fan, 20 heating chamber, 21 door, 22 door gripping portion, 23 door open / close detection means, 24 opening, 25 rail receiving portion, 30 moving means, 30A moving means, 31 gripping portion, 32 rail, 33 frame member, 34 opening, 35 receiving tray engagement portion, 36A driving device, 37A power transmission portion, 40 high frequency generator, 41 waveguide, 42 power feed port, 43 power feed port cover, 44 antenna, 45 antenna rotating means, 48 ​​upper heating means, 49 lower heating means, 50 receiving tray, 50A receiving tray, 51 underside, 52 Convex portion, 53 engaging portion, 54 wheel, 55 wheel holding portion, 56A sliding member, 100 cooking appliance, 100A cooking appliance, 200 kitchen counter, 201 ceiling, 202 right side wall, 203 left side wall, 204 rear wall, 205 bottom, 231 switch, 232 protrusion, 311 opening, 331 connecting portion, 331A connecting portion, 332 pillar portion, 333 upper portion.

Claims

1. a heating chamber having an opening; a door that rotates to open and close the opening; a high frequency generator for supplying electromagnetic waves to the heating chamber; a moving means for moving the tray into and out of the heating chamber, The moving means is a pair of rails disposed outside the heating chamber and moving back and forth; a connecting portion that connects the front portions of the pair of rails and is positioned between the door and the heating chamber when the door is closed; Heating cooker.

2. The moving means is a gripping portion connected to the connecting portion and positioned outside the door when the door is closed; The cooking device according to claim 1.

3. The moving means is a frame member having an opening facing the opening, One side of the frame member is the connection portion. The cooking device according to claim 1 or 2.

4. The gripping portion is a heat insulating means made of a material having a lower thermal conductivity than the material constituting the wall of the heating chamber; a heat insulating means made of a material having a higher reflectivity than the material constituting the walls of the heating chamber; and a radio wave absorbing means for absorbing radio waves; Equipped with one or more of The cooking device according to claim 2.

5. The frame member is a heat insulating means made of a material having a lower thermal conductivity than the material constituting the wall of the heating chamber; a heat insulating means made of a material having a higher reflectivity than the material constituting the walls of the heating chamber; and a radio wave absorbing means for absorbing radio waves; Equipped with one or more of The cooking device according to claim 3.

6. The moving means is An electric drive unit is provided to move the pair of rails. The cooking device according to claim 1 or 2.

7. a door open / close detection means for detecting the open / close state of the door; a control means for controlling the drive device based on a detection result of the door opening / closing detection means, When it is detected that the door has changed from a closed state to an open state, the control means controls the drive device to move the pair of rails from rear to front within a range in which the front end of the moving means does not exceed the front end of the door in the open state. The cooking device according to claim 6.

8. an operation unit that receives an instruction to move the tray into the heating chamber; When the operation unit receives the movement instruction, the control unit moves the pair of rails from front to rear. The cooking device according to claim 7.

9. the moving means includes a tray engaging portion with which the tray disposed between the pair of rails is engaged, The underside of the tray is provided with a movement promoting means that contacts the bottom of the heating chamber and promotes the movement of the tray. The cooking device according to claim 1 or 2.

10. The means for promoting movement is a wheel. The cooking device according to claim 9.

11. The movement promoting means is a low-friction member. The cooking device according to claim 9.

12. The movement promoting means is detachably attached to the tray. The cooking device according to claim 9.

Images