Cooking appliances and grill plates

Abstract

To provide a cooking device and grill plate capable of easily transmitting heat to an entire grill plate and promoting discharge of liquid.SOLUTION: A cooking device includes a heat source, a grill plate disposed on an upper side of the heat source and having through holes penetrating in a vertical direction, first ribs extending downward from the grill plate on the heat source side of the through holes, and second ribs extending downward from the grill plate on an opposite side of the heat source, of the through holes and being longer than the first ribs. Preferably, pointed ends are formed on lower ends of the first ribs or the second ribs.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] This technology relates to a cooking appliance for cooking food and a grill plate.

Background Art

[0002] There has been proposed a barbecue grill in which a gas burner is disposed below an iron plate having a plurality of slits arranged side by side. The slits extend in a first direction. The plurality of slits are arranged in a second direction orthogonal to the first direction at the central portion of the iron plate. Two ribs extending in the second direction project from the lower surface of the iron plate. One rib is close to one end of each of the plurality of slits, and the other rib is close to the other end of each of the plurality of slits. A water tank is disposed below the slits. In the first direction, the gas burner is arranged at a position away from the slits.

[0003] Liquids emitted from food during cooking, such as meat fat, enter the slits and fall into the water tank along the ribs. When a part of the flame of the gas burner travels along the lower surface of the iron plate toward the central portion, it is directed downward by the ribs, preventing the flame from heading toward the slits.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, since the movement of the flame is hindered by the ribs, heat is hardly transmitted to the central portion of the iron plate.

[0006] The present disclosure has been made in view of such circumstances, and an object thereof is to provide a cooking appliance and a grill plate that can easily transfer heat to the entire grilling plate and promote the discharge of liquids.

Means for Solving the Problems

[0007] A heating cooker according to one embodiment of the present disclosure comprises a heat source, a grilling plate positioned above the heat source and having a vertically penetrating through hole, a first rib extending downward from the grilling plate on the heat source side of the through hole, and a second rib extending downward from the grilling plate on the opposite side of the heat source of the through hole and being longer than the first rib.

[0008] In this disclosure, liquid is discharged along the first and second ribs. In addition, heat from the heat source can easily pass over the first rib and reach the second rib, and is then conducted from the second rib to the heated plate.

[0009] In one embodiment of the present disclosure, a heating appliance has a pointed end formed at the lower end of the first rib or the second rib.

[0010] In this disclosure, the liquid concentrates at the tip and is likely to fall from the first or second rib.

[0011] In one embodiment of the present disclosure, the portion of the cooking plate facing the heat source is formed to be thicker than other portions.

[0012] In this disclosure, it is possible to suppress the temperature rise in the part of the heated plate facing the heat source, i.e., the part close to the heat source, and to prevent the temperature difference between that part and other parts from becoming excessively large.

[0013] A heating cooker according to one embodiment of the present disclosure includes a water tank positioned below the grilling plate and reflecting heat from the heat source.

[0014] In this disclosure, heat directed from the heat source towards the water tank is reflected by the water tank and then directed towards the heating plate.

[0015] A heating cooker according to one embodiment of the present disclosure comprises a heat switch that opens and closes according to the temperature of the heating plate, a diode and an AC power supply connected in parallel to the heat switch, and the heat source is connected in series between the diode, the heat switch and the AC power supply.

[0016] In this disclosure, when the thermal switch is closed, the full wave of the AC voltage is used to heat the heat source. When the thermal switch is open, half wave of the AC voltage is used to heat the heat source.

[0017] A heating cooker according to one embodiment of the present disclosure has a through hole comprising a first through hole and a second through hole, a heat source disposed between the first through hole and the second through hole, the first rib disposed on the heat source side of each of the first and second through holes, and the second rib disposed on the opposite side of the heat source of each of the first and second through holes.

[0018] In this disclosure, the liquid enters the first and second through holes and is discharged along the first and second ribs. In addition, heat from the heat source can easily pass over the first rib and reach the second rib, and is then conducted from the second rib to the heated plate.

[0019] A grill plate according to one embodiment of the present disclosure comprises a grilling plate positioned above a heat source and having vertically penetrating through holes, a first rib extending downward from the grilling plate on the heat source side of the through holes, and a second rib extending downward from the grilling plate on the opposite side of the heat source of the through holes and being longer than the first rib.

[0020] In this disclosure, liquid is discharged along the first and second ribs. In addition, heat from the heat source can easily pass over the first rib and reach the second rib, and is then conducted from the second rib to the heated plate. [Effects of the Invention]

[0021] In a heating appliance and grill plate according to one embodiment of the present disclosure, liquid can be discharged along the first and second ribs, thereby promoting liquid discharge. Furthermore, heat from the heat source can more easily pass over the first rib and reach the second rib, and from the second rib it is conducted to the grill plate, allowing heat to be distributed throughout the entire grill plate. [Brief explanation of the drawing]

[0022] [Figure 1] It is a schematic perspective view of a cooking appliance. [Figure 2] It is a schematic front view of a cooking appliance. [Figure 3] It is a schematic left side view of a cooking appliance. [Figure 4] It is a schematic right side cross-sectional view of a cooking appliance taken along the cutting line IV-IV shown in FIG. 2. [Figure 5] It is a schematic bottom view of a grill plate. [Figure 6] It is a schematic front view of a grill plate. [Figure 7] It is a schematic front cross-sectional view of a cooking appliance. [Figure 8] It is a schematic perspective view of a reflector. [Figure 9] It is a schematic right side cross-sectional perspective view of a cooking appliance. [Figure 10] It is a partially enlarged right side cross-sectional perspective explanatory view for explaining the movement of heat radiated from a heat source. [Figure 11] It is a circuit diagram showing an AC power supply, a diode, a thermal switch, a high heat switch, an enable switch, and a heater. [Figure 12] It is a graph for explaining the relationship between the opening and closing of a thermal switch and the detected temperature of the thermal switch.

Embodiments for Carrying Out the Invention

[0023] Hereinafter, the present invention will be described based on the drawings showing a cooking appliance according to an embodiment. In the following description, the up-down, front-back, left-right shown in the drawings will be used as appropriate. The up-down, front-back, left-right shown in the drawings are for facilitating understanding and the directions are not limited thereto. FIG. 1 is a schematic perspective view of a cooking appliance 1, FIG. 2 is a schematic front view of the cooking appliance 1, and FIG. 3 is a schematic left side view of the cooking appliance 1.

[0024] The heating appliance 1 comprises a housing 2 and a grill plate 7. The housing 2 is shaped like a rectangular parallelepiped extending to the left and right. The top surface of the housing 2 is open to the left and right. The grill plate 7 is rectangular in plan view and comprises a grilling plate 70 extending to the left and right. The grilling plate 70 is provided in the top opening of the housing 2. The grilling plate 70 is shaped like a shallow tray. The central part of the grilling plate 70 in the front-to-back direction is formed to be thicker than the other parts of the grilling plate 70 and forms a raised portion 70a that protrudes upward. The raised portion 70a is formed over the entire width of the grilling plate 70. The upper surface of the raised portion 70a is curved and protrudes upward.

[0025] Multiple first through-holes 70b are formed in the recessed portion of the burnt plate 70 in front of the raised portion 70a, penetrating vertically. The multiple first through-holes 70b are arranged in the left-right direction. Similarly, multiple second through-holes 70c are formed in the recessed portion of the burnt plate 70 in rear of the raised portion 70a, penetrating vertically. The multiple second through-holes 70c are arranged in the left-right direction. Each first through-hole 70b and each second through-hole 70c is shaped like a slit extending in the front-to-back direction.

[0026] As mentioned above, since the upper surface of the raised portion 70a has a curved shape that protrudes upward, liquid adhering to the upper surface of the raised portion 70a can easily move to the first through hole 70b or the second through hole 70c, and liquid, such as oil, is less likely to accumulate in the raised portion 70a.

[0027] A connector 4 for a power cable (not shown) is provided on the lower right side of the housing 2. The power cable connects the AC power supply 40 (Figure 11) to the cooking appliance 1. A dial-type control unit 3 is provided on the front of the housing 2. The user operates the control unit 3 to turn the cooking appliance 1 on or off and to set the amount of heat for heating. For example, the control unit 3 is configured to allow selection of one of the following: "high heat," "reduced smoke," "low heat," or "off."

[0028] As shown in Figure 3, an insertion / removal opening 1a for inserting and removing the water tray 5 is formed on the left side of the housing 2. The insertion / removal opening 1a is roughly isosceles trapezoidal when viewed from the left side. The upper base of the insertion / removal opening 1a is longer than the lower base. The water tray 5 is inserted into the insertion / removal opening 1a. Details of the configuration of the water tray 5 will be described later.

[0029] As shown in Figures 2 and 3, a finger grip portion 6 is formed on the left side 5d of the water tray 5. The finger grip portion 6 comprises a recessed portion 6a that is indented to the right, and a protrusion 6b formed above the recessed portion 6a and projecting to the left. The recessed portion 6a has a roughly isosceles trapezoidal shape that is elongated horizontally when viewed from the left side. The upper base of the recessed portion 6a is longer than the lower base. The inside of the protrusion 6b is hollow and connects to the internal space of the recessed portion 6a. The user can insert their finger into the inside of the recessed portion 6a and hook it onto the inner surface of the protrusion 6b to pull out the water tray 5 to the left. The user can then fill the empty water tray 5 with water and store it in the housing 2 through the insertion / removal opening 1a.

[0030] Figure 4 is a schematic right side cross-sectional view of the cooking appliance 1 with the line IV-IV shown in Figure 2 as the cutting line, Figure 5 is a schematic bottom view of the grill plate 7, Figure 6 is a schematic front view of the grill plate 7, and Figure 7 is a schematic front cross-sectional view of the cooking appliance 1. On the lower surface of the grilling plate 70, a rectangular tubular first guide 71 is formed with the vertical direction as its axial direction, surrounding the periphery of a plurality of first through holes 70b. The first guide 71 is rectangular in plan view and extends to the left and right. The first guide 71 protrudes from the lower surface of the grilling plate 70.

[0031] The first guide 71 comprises a first rib 71a, a second rib 71b, a right rib 71c, and a left rib 71d. The first rib 71a is plate-shaped and extends in the left-right direction, positioned facing the rear end of each first through-hole 70b. The left-right dimension of the first rib 71a is slightly longer than the left-right dimension between the rightmost first through-hole 70b and the leftmost first through-hole 70b. As shown in Figures 6 and 7, the lower edge of the first rib 71a has a zigzag shape when viewed from the front. That is, multiple pointed ends 711 are formed on the lower edge of the first rib 71a.

[0032] The second rib 71b is plate-shaped and extends in the left-right direction, positioned facing the front end of each first through-hole 70b. The left-right dimension of the second rib 71b is slightly longer than the left-right dimension between the rightmost first through-hole 70b and the leftmost first through-hole 70b. As shown in Figure 6, the lower edge of the second rib 71b has a zigzag shape when viewed from the front. That is, multiple pointed ends 712 are formed on the lower edge of the second rib 71b. The vertical dimension of the second rib 71b is longer than that of the first rib 71a. The pointed ends 712 of the second rib 71b are located below the pointed ends 711 of the first rib 71a.

[0033] The right rib 71c has a U-shape when viewed from below, with the left side open, and connects the right end of the first rib 71a to the right end of the second rib 71b. As shown in Figure 6, the vertical width of the connection portion of the right rib 71c with the first rib 71a is longer than that of the second rib 71b.

[0034] The left rib 71d has a U-shape when viewed from below, with the right side open, and connects the left end of the first rib 71a to the left end of the second rib 71b. As shown in Figure 6, the vertical width of the connection portion between the left rib 71d and the first rib 71a is longer than that of the second rib 71b.

[0035] A rectangular tubular second guide 72 is formed on the lower surface of the burnt plate 70, with its axis oriented vertically and surrounding the multiple second through holes 70c. The second guide 72 is rectangular in plan view and extends to the left and right. The second guide 72 protrudes from the lower surface of the burnt plate 70.

[0036] The second guide 72 has a shape symmetrical to the first guide 71 with respect to the left-right axis X (see Figure 5) that extends horizontally from the center of the burnt plate 70 in the front-rear direction, and the second guide 72 comprises a first rib 72a, a second rib 72b, a right rib 72c, and a left rib 72d. The first rib 72a has a tip 721. The second rib 72b has a tip 722. The first rib 72a, the second rib 72b, the right rib 72c, the left rib 72d, the tip 721, and the tip 722 correspond to the first rib 71a, the second rib 71b, the right rib 71c, the left rib 71d, the tip 711, and the tip 712, respectively, so a detailed explanation of them is omitted. The first rib 72a is plate-shaped and extends in the left-right direction, and is positioned facing the front end of each second through hole 70c. The second rib 72b is plate-shaped and extends in the left-right direction, and is positioned facing the rear end of each second through hole 70c.

[0037] Even if oil splatters on the heating plate 70 and passes through the first through-hole 70b or the second through-hole 70c, the first guide 71 or the second guide 72 prevents the oil from spreading, thus preventing the inside of the housing 2 from becoming contaminated.

[0038] The lower edges of the first ribs 71a, 72a and the second ribs 71b, 72b do not necessarily have to be formed in a zigzag shape, and the tip may be singular. For example, the lower edges of the first ribs 71a, 72a and the second ribs 71b, 72b may be formed in a singular triangular shape.

[0039] The housing 2 houses the heat source 9. The heat source 9 is supported in the center of the upper part of the housing 2 in the front-to-back direction. As shown in Figure 4, the heat source 9 is positioned between the first ribs 71a and 72a in the front-to-back direction, and below the first ribs 71a and 72a in the vertical direction. The heat source 9 is positioned below the raised portion 70a and above the water tray 5. That is, in the vertical direction, the heat source 9 is positioned between the raised portion 70a and the water tray 5. The heat source 9 comprises a cylindrical body 9a and a heater 9b housed in the cylindrical body 9a. The cylindrical body 9a is a transparent cylinder made of, for example, quartz glass. The heater 9b is, for example, an elongated graphite heater. The cylindrical body 9a and the heater 9b housed in the cylindrical body 9a, i.e., the heat source 9, extend in the left-to-right direction and are positioned below the entire raised portion 70a so as to face the entire raised portion 70a.

[0040] A guard 8 is provided between the heat source 9 and the raised portion 70a. The guard 8 is mesh-like and is positioned to cover the upper side of the heat source 9. The mesh-like guard 8 has numerous openings, and the heat emitted from the heat source 9 can reach the raised portion 70a through these openings. The heating plate 70 can be removed from the housing 2. Even when the heating plate 70 is removed from the housing 2, the guard 8 covers the upper side of the heat source 9, preventing the heat source 9 from being exposed and increasing user safety. In the vertical direction, a reflector 10 is positioned between the heat source 9 and the water tray 5.

[0041] Figure 8 is a schematic perspective view of the reflector 10. The reflector 10 comprises a first reflector 11, second reflectors 12a, 12b, 12c, and 12d, and reinforcing plates 14a and 14b. The first reflector 11 has a semi-cylindrical shape with both ends forming arcs of a predetermined length. The first reflector 11 extends in the axial direction. In this embodiment, the first reflector 11 is positioned such that the axial direction corresponds to the left-right direction, and the apex of the arc faces downward.

[0042] Multiple through-holes 11a are formed in the middle of the first reflector 11 in the axial direction, extending radially. The multiple through-holes 11a are aligned in the axial direction. Each through-hole 11a is formed near the apex of the arc, i.e., at the lower end of the first reflector 11. Each through-hole 11a penetrates in the vertical direction. By providing the through-holes 11a, grease or oil adhering to the inner surface of the reflector 10 can be discharged.

[0043] Second reflectors 12a, 12b, 12c, and 12d are formed at both ends of the first reflector 11 in the axial direction, that is, at the left end and right end of the first reflector 11, respectively. The left end of the reflector 10 has the left end of the first reflector 11 and the two second reflectors 12a and 12b. The right end of the reflector 10 has the right end of the first reflector 11 and the two second reflectors 12c and 12d. The middle part of the reflector 10 in the left-right direction has the middle part of the first reflector 11 in the left-right direction and does not have a second reflector.

[0044] At the left end of the first reflector 11, the second reflectors 12a and 12b project diagonally upward and forward from the front and rear edges, respectively. The second reflectors 12a and 12b are rectangular in shape, elongated horizontally. One longitudinal edge of the second reflectors 12a and 12b, i.e., the lower edge of the second reflectors 12a and 12b, is integrally connected to the front and rear edges of the left end of the first reflector 11. The other longitudinal edge of the second reflectors 12a and 12b constitutes the upper edge of the second reflectors 12a and 12b.

[0045] At the right end of the first reflector 11, the second reflectors 12c and 12d project diagonally forward and upward from the front and rear edges of the first reflector 11. The second reflectors 12c and 12d have a long rectangular shape. One longitudinal edge of the second reflectors 12c and 12d, i.e., the lower edge of the second reflectors 12c and 12d, is integrally connected to the front and rear edges of the right end of the first reflector 11. The other longitudinal edge of the second reflectors 12c and 12d constitutes the upper edge of the second reflectors 12c and 12d.

[0046] Spaces are provided between the two left and right second reflectors 12a and 12c, and between the two left and right second reflectors 12b and 12d. In other words, a notched space 15a is formed when viewed from the front or rear by the front edge of the middle part of the first reflector 11 in the left direction, the right edge of the left second reflector 12a, and the left edge of the right second reflector 12c. Also, a notched space 15b is formed when viewed from the front or rear by the rear edge of the middle part of the first reflector 11 in the left direction, the right edge of the left second reflector 12b, and the left edge of the right second reflector 12d.

[0047] Reinforcement plates 14a and 14b protrude diagonally downward and rearward from the front and rear edges of the first reflector 11, respectively. The reinforcement plates 14a and 14b are strip-shaped and extend to the left and right. One longitudinal edge of the reinforcement plates 14a and 14b, i.e., the upper edge of the reinforcement plates 14a and 14b, is integrally connected to the front and rear edges of the first reflector 11. The other longitudinal edge of the reinforcement plates 14a and 14b constitutes the lower edge of the reinforcement plates 14a and 14b.

[0048] Figure 9 is a schematic right side cross-sectional perspective view of the cooking appliance 1. As shown in Figures 4 and 9, in the vertical direction, the reflector 10 is positioned below the first ribs 71a and 72a. That is, the notched spaces 15a and 15b are positioned below the first ribs 71a and 72a. At least a portion of the heat source 9, for example, the upper half of the heat source 9, faces the second rib 71b directly in the front-rear direction via space 15a and the inner space of the first guide 71, and faces the second rib 72b directly via space 15b and the inner space of the second guide 72.

[0049] The water tray 5 has an open top surface and is shaped like a rectangular parallelepiped extending to the left and right. The cross-sectional shape of the side of the water tray 5 is roughly trapezoidal, following the shape of the insertion / removal opening 1a. The water tray 5 has a bottom surface 5a, a front surface 5b, a rear surface 5c, a left surface 5d, and a right surface (not shown). The front surface 5b is inclined to rise as it approaches the front. The rear surface 5c is inclined to rise as it approaches the rear. The center of the upper edge in the front-rear direction of the right and left surfaces 5d of the water tray 5 is recessed to avoid interference with the reflector 10 (see Figures 4 and 9). The water tray 5 is made of a heat-reflective material, such as an aluminum material or an iron material with a heat-reflective layer formed on its surface.

[0050] As shown in Figure 4, in the vertical direction, the first ribs 71a and 72a face the bottom surface 5a, the second rib 71b faces the front surface 5b, and the second rib 72b faces the rear surface 5c. In other words, the first ribs 71a and 72a and the second ribs 71b and 72b are positioned within the area of ​​the water tray 5 in a plan view. In the vertical direction, there are no objects between each first through-hole 70b and each second through-hole 70c and the top opening of the water tray 5. That is, liquid falling from the first through-hole 70b and the second through-hole 70c reaches the inside of the water tray 5 without being prevented from falling.

[0051] Liquid flowing along the first ribs 71a and 72a is collected at the tips 711 and 721 and falls from the tips 711 and 721 towards the bottom surface 5a of the water tray 5. Liquid flowing along the second ribs 71b and 72b is collected at the tips 712 and 722 and falls from the tips 712 and 722 towards the front surface 5b and rear surface 5c of the water tray 5. Liquid from the food is less likely to leak outside the water tray 5, making it easy to keep the inside of the housing 2 clean. The cooking plate 70 and the water tray 5 can be removed, so the user can easily clean the cooking plate 70 and the water tray 5 if liquid has adhered to them, and the cooking appliance 1 can be stored on a shelf or in a warehouse in a clean state.

[0052] Figure 10 is a partially enlarged right side cross-sectional perspective view illustrating the transfer of heat radiated from the heat source 9. Heat radiated from the heater 9b toward the first rib 72a is conducted through the first rib 72a and reaches the burnt plate 70 (see arrows 31a and 31b). Similarly, heat radiated toward the first rib 71a also reaches the first rib 71a and then the burnt plate 70. The first ribs 71a and 72a also function as a screen for the heat source 9, preventing light leakage from the first through-hole 70b or the second through-hole 70c, and suppressing a decrease in appearance quality.

[0053] The heat radiated from the heater 9b toward the second rib 72b is conducted through the second rib 72b and reaches the heated plate 70 (see arrows 32a and 32b). The vertical dimension of the first rib 72a is shorter than the vertical dimension of the second rib 72b, and a space 15b is provided in the reflector 10, so heat is radiated directly from the heater 9b to the second rib 72b. Similarly, the heat radiated toward the second rib 71b passes through the space 15a and the underside of the first rib 71a, reaches the second rib 71b, and then reaches the heated plate 70.

[0054] The second ribs 71b and 72b are longer vertically than the first ribs 71a and 72a, and the lower edges of the second ribs 71b and 72b are located below the lower edges of the first ribs 71a and 72a. The second ribs 71b and 72b are located further away from the heat source 9 than the first ribs 71a and 72a. As a result, heat is more easily transferred to the parts of the grilling plate 70 that are farther from the heat source 9, the entire grilling plate 70 is more easily heated, and the occurrence of uneven heating in the grilling plate 70 is suppressed.

[0055] The heat radiated from the heater 9b towards the reflector 10, i.e., the first reflector 11 or the second reflectors 12a-12d, is reflected by the first reflector 11 or the second reflectors 12a-12d towards the raised portion 70a, and reaches the raised portion 70a (see arrows 33a and 33b). The reflector 10 reduces the radiant heat directed toward the water tray 5, thereby suppressing the temperature rise of the water tray 5. In addition to the heat from convection, the heat reflected by the reflector 10 is supplied to the raised portion 70a. The raised portion 70a is formed thicker than the other parts of the baking plate 70. Therefore, it has a larger heat capacity than the other parts, and excessive heating of only the raised portion 70a is suppressed.

[0056] The heat radiated from the heater 9b toward the rear surface 5c of the water tray 5 is reflected by the rear surface 5c and reaches the cooking plate 70 (see arrows 34a and 34b). The vertical dimension of the first rib 72a is shorter than the vertical dimension of the second rib 72b, and a space 15b is provided in the reflector 10, so heat is radiated directly from the heater 9b to the rear surface 5c. Similarly, the heat radiated toward the front surface 5b passes under the space 15a and the first rib 71a, is reflected by the front surface 5b, and reaches the cooking plate 70. The heat radiated diagonally downward from the heater 9b can be used for cooking, enabling efficient use of heat. Also, since the front surface 5b and the rear surface 5c reflect heat, there is no need to extend the second ribs 71b and 72b downward for heat reflection. If the second ribs 71b and 72b are extended downward, oil adhering to the second ribs 71b and 72b is more likely to remain, which can easily lead to smoke generation.

[0057] It is also conceivable to make the first reflector plate 11 larger without providing spaces 15a and 15b in the reflector 10, so that the heat radiated from the heater 9b in a diagonal downward-front or diagonal downward-rear direction is reflected by the first reflector plate 11. However, if the first reflector plate 11 is made larger, oil will adhere to the first reflector plate 11 more easily, and heat will be excessively concentrated on the raised portion 70a, making it easier for uneven heating to occur on the grilling plate 70. By configuring the heat radiated from the heater 9b in a diagonal downward-front or diagonal downward-rear direction to be reflected by the front portion 5b and rear portion 5c of the water tray 5, these problems can be avoided.

[0058] As shown in Figures 5 and 6, two protrusions 70d protrude from the lower surface of the burnt plate 70. The two protrusions 70d are located on the right rear and left front, respectively. The two protrusions 70d are positioned symmetrically with respect to the intersection of the left-right axis X and the front-rear axis Y, which extends from the left-right center of the burnt plate 70 (the center of the burnt plate 70) (see Figure 5). Legs 70e protruding downward are provided at each of the four corners of the burnt plate 70.

[0059] As shown in Figure 4, the heat transfer plate 12 and the thermal switch 13 are housed in the housing 2. The heat transfer plate 12 is positioned below the protrusion 70d. The heat transfer plate 12 is biased upward by a biasing member (not shown) and contacts the protrusion 70d. Even if the heating plate 70 is rotated 180 degrees and placed in the housing 2, the heat transfer plate 12 will still contact one of the protrusions 70d. The thermal switch 13 is fixed to the heat transfer plate 12. The thermal switch 13 has, for example, a thermostat and opens and closes according to the detected temperature, i.e., the temperature of the heating plate 70.

[0060] Figure 11 is a circuit diagram showing an AC power supply 40, a diode 16, a heat switch 13, a high-heat switch 17, an enable switch 18, and a heater 9b. The heating cooker 1 is equipped with a control circuit, which has a diode 16, a heat switch 13, a high-heat switch 17, and an enable switch 18. The high-heat switch 17 and the enable switch 18 open and close in response to the operation of the control unit 3. As shown in Figure 11, the AC power supply 40, the high-heat switch 17, the diode 16, and the heat switch 13 are connected in parallel. The heater 9b is connected in series between the high-heat switch 17, the diode 16, the heat switch 13, and the AC power supply 40. The enable switch 18, the high-heat switch 17, and the diode 16 are connected in parallel. The enable switch 18 and the heat switch 13 are connected in series.

[0061] For example, one end of the AC power supply 40 is connected to the anode of the diode 16, one end of the enable switch 18, and one end of the high-heat switch 17. The other end of the enable switch 18 is connected to one end of the heat switch 13. The other end of the high-heat switch 17 is connected to the cathode of the diode 16, the other end of the heat switch 13, and one end of the heater 9b. The other end of the heater 9b is connected to the other end of the AC power supply 40.

[0062] When the user operates the control unit 3 and selects "high heat," the enable switch 18 opens and the high heat switch 17 closes. Since the enable switch 18 is open, the heat switch 13 does not function. Regardless of the temperature detected by the heat switch 13, the closing of the high heat switch 17 ensures that the entire wave of the AC voltage is always used to heat the heater 9b. In other words, the user can cook on high heat.

[0063] When the user operates the control unit 3 and selects "low heat," the enable switch 18 and the high heat switch 17 open. Since the enable switch 18 is open, the heat switch 13 does not function. Regardless of the temperature detected by the heat switch 13, the diode 16 always uses half a wave of AC voltage to heat the heater 9b. In other words, the user can cook on low heat.

[0064] Figure 12 is a graph illustrating the relationship between the opening and closing of the heat switch 13 and the temperature detected by the heat switch 13. The solid line in Figure 12 shows the graph when the detected temperature changes from a temperature below T2 to a temperature above T1, and the dashed line shows the graph when the detected temperature changes from a temperature above T1 to a temperature below T2. When the user operates the control unit 3 and selects "smoke reduction," the active switch 18 closes and the high-heat switch 17 opens. Since the active switch 18 is closed, the heat switch 13 functions. In other words, the opening and closing of the heat switch 13 affects the temperature of the heater 9b.

[0065] For example, if the temperature detected by the thermal switch 13 is greater than or equal to the first threshold T1, or if the temperature has fallen from greater than or equal to the first threshold T1 to less than or equal to the first threshold T1, and is between a second threshold T2 (which is lower than the first threshold T1) and less than the first threshold T1, the thermal switch 13 opens. In other words, half-wave AC voltage is used.

[0066] The thermal switch 13 closes when the detected temperature is below the second threshold T2, or when the temperature rises from below the second threshold to above the second threshold, but is between the first and second thresholds. In other words, the entire AC voltage is used. Put another way, the thermal switch 13 has hysteresis, and the temperature between the first and second thresholds constitutes a dead zone.

[0067] As shown by the solid line in Figure 12, when the detected temperature is below the second threshold T2 and reaches the first threshold T1, the heat switch 13 is closed and the full wave of the AC voltage is used. In other words, cooking is performed over high heat. When the temperature reaches or exceeds the first threshold T1, the heat switch 13 opens and half wave of the AC voltage is used. In other words, cooking is performed over low heat.

[0068] As shown by the dashed line in Figure 12, the heat switch 13 is open and half-wave AC voltage is used when the detected temperature falls from above the first threshold T1 to the second threshold T2. In other words, cooking is performed over low heat. When the temperature falls below the second threshold T2, the heat switch 13 is closed and the full-wave AC voltage is used. In other words, cooking is performed over high heat.

[0069] As described above, when "smoke reduction" is selected, the full or half wave of the AC voltage is used, and the heating of the heater 9b is not interrupted but continues, so that radiant heat is continuously supplied to the food through the first through-hole 70b or the second through-hole 70c. In addition, the temperature of the grilling plate 70 is controlled to stay within a temperature range that produces less smoke and can grill food to a certain extent.

[0070] If the user operates the control unit 3 and selects "Off", the power supply from the AC power supply 40 is stopped. In other words, the cooking appliance 1 is turned off.

[0071] In the heating appliance 1 and grill plate 7 according to this embodiment, liquid is discharged along the first ribs 71a, 72a and the second ribs 71b, 72b, thereby promoting liquid discharge. Furthermore, heat from the heat source 9 can more easily reach the second ribs 71b, 72b beyond the first ribs 71a, 72a, and is then conducted from the second ribs 71b, 72b to the grill plate 70, thereby distributing heat throughout the entire grill plate 70.

[0072] Furthermore, the liquid tends to concentrate at the tip 711, 721, 712, and 722, and is more likely to fall from 71a, 72a and the second ribs 71b, 72b.

[0073] Furthermore, it is possible to suppress the temperature rise of the raised portion 70a in the part of the heated plate 70 that faces the heat source, i.e., the portion close to the heat source 9, and to prevent the temperature difference between this portion and other parts from becoming excessively large.

[0074] Furthermore, the heat from the heat source 9 is reflected by the water tray 5 and directed towards the baking plate 70. Therefore, the heat from the heat source 9 can be used efficiently.

[0075] Furthermore, when the heat switch 13 is closed, the full wave of the AC voltage is used to heat the heat source 9. When the heat switch 13 is open, half wave of the AC voltage is used to heat the heat source 9. The opening and closing of the heat switch 13 is controlled according to the detected temperature. As a result, the temperature of the grilling plate 70 can be controlled to stay within a temperature range that minimizes smoke and allows food to be grilled to a certain extent.

[0076] The embodiments disclosed herein should be considered illustrative and not restrictive in all respects. The scope of the present invention is intended to include all modifications within the claims and equivalents thereof. The matters described in each embodiment can be combined with one another. Furthermore, the independent and dependent claims described in the claims can be combined with one another in any combination, regardless of the form of reference. In addition, the claims use a multi-claim format in which claims refer to two or more other claims (multi-claim format), but are not limited thereto. They may also be described using a multi-claim format in which at least one multi-claim refers to another multi-claim (multi-multi-claim format). [Explanation of Symbols]

[0077] 1 Cooker 7 Grill Plate 70 burnt wood 70a Raised portion (the part of the baking plate facing the heat source) 71a, 72a First Rib 71b, 72b Second Rib 711, 712, 721, 722 Point 5. Water tray (aquarium) 9 Heat source 13 Thermal switches 16 diodes 40 AC power supply

Claims

1. Heat source and A heating plate is positioned above the heat source and has through holes that penetrate vertically, A first rib extending downward from the burning plate on the heat source side of the through hole, A second rib extends downward from the burning plate on the opposite side of the through hole from the heat source and is longer than the first rib. A cooking appliance equipped with a heating element.

2. A pointed end is formed at the lower end of the first rib or the second rib. A heating appliance according to claim 1.

3. The portion of the baking plate facing the heat source is formed to be thicker than the other portions. A heating appliance according to claim 1 or 2.

4. The grilling plate is positioned below the water tank, which reflects heat from the heat source. A heating appliance according to claim 1 or 2.

5. A heat switch that opens and closes according to the temperature of the aforementioned heating plate, A diode and an AC power supply connected in parallel to the aforementioned thermal switch Equipped with, The heat source is connected in series between the diode, the thermal switch, and the AC power supply. A heating appliance according to claim 1 or 2.

6. The aforementioned through hole includes a first through hole and a second through hole. The heat source is positioned between the first through hole and the second through hole. The first rib is positioned on the heat source side of each of the first and second through holes. The second rib is positioned on the opposite side of the heat source from each of the first and second through holes. A heating appliance according to claim 1 or 2.

7. A heating plate positioned above the heat source and having through holes running vertically through it, A first rib extending downward from the burning plate on the heat source side of the through hole, A second rib extends downward from the burning plate on the opposite side of the through hole from the heat source and is longer than the first rib. A grill plate equipped with a grill plate.

Images