Heating plate, burner cover, gas burner, and heating cooker
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- SHINPO CO LTD
- Filing Date
- 2023-12-15
- Publication Date
- 2026-07-17
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a hot plate for a cooking appliance. The present invention relates to a burner cover for a cooking appliance. The present invention relates to a gas burner for a cooking appliance. The present invention relates to a cooking appliance including at least one of the gas burner, the burner cover, and the hot plate.
Background Art
[0002] Conventionally, a cooking appliance including a casing, a drain pan, a gas burner, a burner cover, a hot plate, and a cooking utensil is known.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] An object of the present invention is to provide a component having a novel structure for a cooking appliance and a cooking appliance including such a component.
Means for Solving the Problems
[0005] The present application provides an invention in the following aspects. A hot plate that can be disposed above a gas burner for a cooking appliance and can be disposed below a cooking utensil for placing food ingredients, having a first inclined portion that inclines downward toward the radially outer side, a second inclined portion provided radially outward of the first inclined portion and inclining upward toward the radially outer side, a valley portion provided between the first inclined portion and the second inclined portion, and comprising, wherein the valley portion does not have a through hole, the hot plate.
Advantages of the Invention
[0006] Since the through holes are not provided in the valleys of the hot plate, the oil flowing on the second inclined portion is less likely to scatter toward the gas burner. As a result, the amount of oil adhering to the gas burner can be reduced.
Brief Description of the Drawings
[0007]
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7A
Figure 7B
Figure 7C
Figure 7D
Figure 7E
Figure 8A
Figure 8B
Figure 8C
Figure 8D
Figure 9A
Figure 9B
Figure 9C
Figure 9D
Figure 9E
Figure 10
Mode for Carrying Out the Invention
[0008] The cooking heater 1000 and its components will be described with reference to the drawings.
[0009] <1. Overview of the cooking heater> FIG. 1 is a perspective view of the cooking heater 1000. The cooking heater 1000 is a device for cooking food by heating. In one embodiment, the cooking heater 1000 is a cooking heater for cooking food by grilling, such as grilled meat or yakitori.
[0010] The cooking heater 1000 may be an embedded cooking heater that can be housed in a casing in which most of the cooking heater 1000 is provided under the top plate of the table. Alternatively, the cooking heater 1000 may be a tabletop cooking heater that can be placed on the top plate of the table with the entire cooking heater 1000.
[0011] As shown in FIG. 2, the cooking heater 1000 mainly includes a casing 10, a filter 20, a drain pan 30, a gas burner 40, a burner cover 50, a hot plate 60, cooking utensils 70, and a top ring 80. The filter 20 is connected to an exhaust device such as a blower (not shown) via an exhaust duct (not shown) disposed under the filter 20.
[0012] As shown in FIGS. 2 and 3, the filter 20 and the drain pan 30 are disposed within the casing 10. A part of the gas burner 40, the burner cover 50, the hot plate 60, and the cooking appliance 70 are disposed within the drain pan 30. The cooking appliance 70 is a member for placing food ingredients thereon. The cooking appliance 70 may have a plurality of through holes. The cooking appliance 70 is, for example, a net or a rost.
[0013] When the air-fuel mixture ejected from the gas burner 40 is ignited, the surrounding air is heated by the flame of the gas burner 40, and hot air is generated. The hot plate 60 is heated by the flame of the gas burner 40 and the generated hot air. The heated hot plate 60 radiates radiant heat. The cooking appliance 70 and the food ingredients on the cooking appliance 70 are heated by the hot air and the radiant heat. The smoke generated when cooking the food ingredients is sucked from the top ring 80 by the suction action of the exhaust device, filtered by the filter 20, and exhausted to the outside of the cooking heater 1000.
[0014] Hereinafter, each component of the cooking heater 1000 will be described in detail. For convenience of explanation, the vertical direction in FIG. 1 will be described as the vertical direction of the cooking heater 1000. Also, when there are a plurality of identical components, for ease of viewing the drawings, only some of the identical components may be labeled.
[0015] <1-1. Casing and Filter> As shown in FIGS. 2 and 3, the casing 10 includes a bottom wall 11, side walls 12, and an upper wall 13. The side walls 12 extend upward from the bottom wall 11.
[0016] The bottom wall 11 has an opening at a position below the drain pan 30. As shown in FIG. 3, a burner receiver 90 that supports the gas burner 40 is disposed within this opening. Below the burner receiver 90, a first support plate 100 that supports the burner receiver 90 is disposed. Below the first support plate 100, a second support plate 110 that supports the first support plate 100 is disposed. Below the second support plate 110, a pilot burner (not shown) and an ultraviolet sensor (not shown) are disposed. The pilot burner is a burner for igniting the air-fuel mixture ejected from the gas burner (main burner) 40. The ultraviolet sensor is a sensor for detecting the ultraviolet rays radiated from the flame ejected from the gas burner 40.
[0017] As shown in FIG. 4, the burner receiver 90 has a through hole 90a for passing the conduit portion 412 of the burner body 41 described later, a through hole 90b for passing the flame of the pilot burner, a through hole 90c for passing the ultraviolet rays radiated from the flame, and two through holes 90d for inserting the protrusion 416 of the burner body 41 described later.
[0018] As shown in FIG. 5, the first support plate 100 has a through hole 100a for passing the conduit portion 412 of the burner body 41, a through hole 100b for passing the flame from the pilot burner, and a through hole 100c for passing the ultraviolet rays radiated from the flame.
[0019] As shown in FIG. 6, the second support plate 110 has a through hole 110a for passing the conduit portion 412 of the burner body 41, a through hole 110b for passing the flame from the pilot burner, and a through hole 110c for passing the ultraviolet rays radiated from the flame. The through hole 110a communicates with the through hole 90a of the burner receiver 90 and the through hole 100a of the first support plate 100. The second support plate 110 includes a peripheral wall 110d extending upward from the periphery of the through hole 110b. The peripheral wall 110d is inserted into the through hole 100b of the first support plate 100. The through hole 110b of the second support plate 110 communicates with the through hole 90b of the burner receiver 90. The second support plate 110 includes a peripheral wall 110e extending upward from the periphery of the through hole 110c. The peripheral wall 110e is inserted into the through hole 100c of the first support plate 100. The through hole 110c of the second support plate 110 communicates with the through hole 90c of the burner receiver 90.
[0020] The bottom wall 11 has another opening at a position laterally displaced from the burner receiver 90. A filter 20 (see FIG. 2) is disposed above the another opening.
[0021] The filter 20 filters the oil contained in the smoke. As shown in FIG. 2, the filter 20 is composed of, for example, three metal ring-shaped members stacked vertically. Since the detailed structure of the filter 20 is disclosed in, for example, Japanese Patent Application Laid-Open No. 2011-153722, a detailed description of the structure of the filter 20 is omitted in this specification.
[0022] As shown in FIG. 2, the upper wall 13 has an opening 13a for placing the drain pan 30 into the casing 10. The upper wall 13 also has a cylindrical upright portion 13b extending upward from the periphery of the opening 13a. A support member 120 is attached to the upright portion 13b. The support member 120 supports the top ring 80 from below. As shown in FIG. 3, the upper part of the support member 120 has a step 120a, and the top ring 80 is placed on the step 120a.
[0023] <1-2. Drain Pan> As shown in FIGS. 2 and 3, the drain pan 30 includes a bottom wall 31, an inner peripheral wall 32, and an outer peripheral wall 33. The bottom wall 31 is in a donut shape having a circular opening at the center. The inner peripheral wall 32 is integrated with the bottom wall 31 and extends upward from the inner edge of the opening of the bottom wall 31. The inner peripheral wall 32 is in a frustum-shaped cylindrical form with a diameter gradually decreasing upward. The space surrounded by the inner peripheral wall 32 and the opening of the bottom wall 31 is an arrangement space 32a for arranging the gas burner 40. The outer peripheral wall 33 is integrated with the bottom wall 31 and extends upward from the outer edge of the bottom wall 31. The upper part of the outer peripheral wall 33 spreads outward. The upper part of the outer peripheral wall 33 has a step 33a for arranging the cooking appliance 70.
[0024] <1-3. Gas Burner> The gas burner 40 heats the air around the gas burner 40 to generate hot air and heats the hot plate 60. As shown in FIG. 3, the gas burner 40 extends from below the arrangement space 32a, passes through the arrangement space 32a, and extends above the upper end of the inner peripheral wall 32. The gas burner 40 includes a burner body 41 and a burner head 42.
[0025] As shown in FIGS. 7A to 7C, the burner body 41 includes a bottom plate 411, a conduit portion 412, an outer shell portion 413, and an inner cylinder portion 414.
[0026] The bottom plate 411 is in a donut shape having a circular opening at the center. The bottom plate 411 has a through hole 411a. The bottom plate 411 is provided with two extending portions 415 extending downward and two protruding portions 416 protruding downward from each of the two extending portions 415. The two protruding portions 416 are respectively inserted into the through holes 90d of the burner receiver 90. The extending portions 415 are placed on the burner receiver 90.
[0027] The conduit portion 412 is provided at a position eccentric in the lateral direction from the center of the burner main body 41. Further, the conduit portion 412 is integrated with the bottom plate 411 and extends downward from the bottom plate 411. The conduit portion 412 is inserted into the through-hole 90a of the burner receiver 90, the through-hole 100a of the first support plate 100, and the through-hole 110a of the second support plate 110. The interior of the conduit portion 412 communicates with the through-hole 411a of the bottom plate 411.
[0028] The outer shell portion 413 includes an outer cylindrical portion 4131 and a protruding portion 4132.
[0029] The outer cylindrical portion 4131 is cylindrical. The outer cylindrical portion 4131 extends upward from the outer edge of the bottom plate 411. The central axis of the outer cylindrical portion 4131 coincides with the central axis of the inner peripheral wall 32 of the drain pan 30. The outer peripheral surface of the outer cylindrical portion 4131 extends parallel to the central axis of the outer cylindrical portion 4131. The upper end of the outer cylindrical portion 4131 has an inclined surface 4131a that inclines downward toward the radially outer side of the outer cylindrical portion 4131.
[0030] The protruding portion 4132 is located above the conduit portion 412 and protrudes radially outward from the outer cylindrical portion 4131. The upper surface of the protruding portion 4132 is an inclined upper surface 4132a that inclines downward toward the radially outer side of the outer cylindrical portion 4131.
[0031] The inner cylindrical portion 414 is cylindrical. The central axis of the inner cylindrical portion 414 coincides with the central axis of the outer cylindrical portion 4131. The inner cylindrical portion 414 extends from the inner edge of the bottom plate 411 above the upper end of the outer cylindrical portion 4131. The upper end of the inner cylindrical portion 414 has an inclined surface 414a that inclines downward toward the radially outer side of the inner cylindrical portion 414.
[0032] As shown in FIG. 7D, a part of the ultraviolet rays radiated from the flame (schematically indicated by an arrow in FIG. 7D) moves downward in the inner space of the inner cylinder portion 414, passes through the through hole 90c and the through hole 110c, and reaches the ultraviolet sensor. In order not to obstruct the movement of the ultraviolet rays, it is preferable that the portion of the inner surface of the lower part of the inner cylinder portion 414, which is located above the through hole 90c of the burner receiver 90, extends outward in the radial direction of the inner cylinder portion 414. In one embodiment, the portion of the inner surface of the lower part of the inner cylinder portion 414, which is located at the through hole 90c of the burner receiver 90, is an inclined surface 414b that inclines downward toward the outer side in the radial direction of the inner cylinder portion 414. The inclined surface 414b is provided at a position substantially symmetric to the conduit portion 412 with respect to the central axis of the burner body 41.
[0033] The burner head 42 is covered on the upper part of the burner body 41. The central axis of the burner head 42 coincides with the central axis of the inner cylinder portion 414 of the burner body 41.
[0034] As shown in FIGS. 7A, 7B, and 7E, the burner head 42 includes a peripheral wall 421 and an upper wall 422. The inside of the burner head 42 is hollow. The lower end of the peripheral wall 421 is open. Further, the upper wall 422 has a circular opening 422a at the center. The opening 422a of the upper wall 422 communicates with the inside of the peripheral wall 421.
[0035] As shown in FIG. 7E, the peripheral wall 421 includes a first inner peripheral surface 4211, an intermediate inner peripheral surface 4212, a second inner peripheral surface 4213, and an inclined inner peripheral surface 4214.
[0036] As shown in FIG. 7E, the first inner peripheral surface 4211 is provided at the lower end of the burner head 42. The first inner peripheral surface 4211 is a cylindrical surface that extends parallel to the central axis of the burner head 42 and the outer peripheral surface of the outer cylinder portion 4131. The vertical length L1 of the first inner peripheral surface 4211 is preferably 2 mm or more, for example, 2 mm to 3 mm.
[0037] As shown in the partial enlarged view of FIG. 7B, the first inner peripheral surface 4211 is located outside the outer peripheral surface of the outer cylinder portion 4131 with a gap G therebetween from the outer peripheral surface of the outer cylinder portion 4131. The size d1 of the gap G is preferably 1.5 mm or more, for example, 1.5 mm to 2 mm. Note that the size d1 of the gap G is the distance in the horizontal direction (the direction perpendicular to the central axis of the outer cylinder portion 4131) between the first inner peripheral surface 4211 and the outer peripheral surface of the outer cylinder portion 4131. Further, the vertical interval d2 between the upper end of the inclined upper surface 4132a of the protruding portion 4132 (that is, the boundary portion between the inclined upper surface 4132a and the outer peripheral surface of the outer cylinder portion 4131) and the lower end of the burner head 42 is preferably 3 mm or more, for example, 3 mm to 5 mm.
[0038] As shown in FIG. 7E, the intermediate inner peripheral surface 4212 connects the upper end of the first inner peripheral surface 4211 and the lower end of the second inner peripheral surface 4213. The intermediate inner peripheral surface 4212 is a donut-shaped flat surface. The intermediate inner peripheral surface 4212 extends from the upper end of the first inner peripheral surface 4211 toward the central axis of the burner head 42 in a direction perpendicular to the central axis of the burner head 42.
[0039] As shown in FIG. 7E, the second inner peripheral surface 4213 extends upward from the radially inner end of the intermediate inner peripheral surface 4212. The second inner peripheral surface 4213 is a cylindrical surface extending parallel to the central axis of the burner head 42 and the outer peripheral surface of the outer cylinder portion 4131. The vertical length L2 of the second inner peripheral surface 4213 is determined according to the length of L1. For example, when L1 is 2 mm, L2 is 10 mm to 11 mm.
[0040] As shown in FIG. 7B, the second inner peripheral surface 4213 is located outside the outer peripheral surface of the outer cylinder portion 4131. The diameter of the second inner peripheral surface 4213 is slightly larger than the outer diameter of the outer cylinder portion 4131 and smaller than the diameter of the first inner peripheral surface 4211. Therefore, the size of the gap between the second inner peripheral surface 4213 and the outer peripheral surface of the outer cylinder portion 4131 is very small and smaller than the size d1 of the gap G.
[0041] As shown in FIG. 7E, the inclined inner peripheral surface 4214 is inclined upward toward the central axis of the burner head 42. As shown in FIG. 7B, when the burner head 42 is placed on the burner body 41, the inclined inner peripheral surface 4214 contacts the inclined surface 4131a of the outer cylinder portion 4131. The inclination angle of the inclined inner peripheral surface 4214 is the same as the inclination angle of the inclined surface 4131a of the outer cylinder portion 4131.
[0042] As shown in FIG. 7B, the burner head 42 has a plurality of outer peripheral flame ports 421a and a plurality of inner peripheral flame ports 422b.
[0043] As shown in FIG. 7E, the plurality of outer peripheral flame ports 421a are through holes penetrating the peripheral wall 421. The plurality of outer peripheral flame ports 421a are provided at equal intervals in the circumferential direction at the upper part of the peripheral wall 421. Each outer peripheral flame port 421a is inclined upward toward the radially outer side of the burner head 42.
[0044] As shown in FIG. 7E, the upper wall 422 has a protruding portion 4221 that protrudes downward and extends in the circumferential direction of the upper wall 422. The protruding portion 4221 is located radially inward of the peripheral wall 421. The lower end of the protruding portion 4221 has an inclined surface 4221a that is inclined upward toward the central axis of the burner head 42. The inclination angle of the inclined surface 4221a is the same as the inclination angle of the inclined surface 414a of the inner cylinder portion 414.
[0045] Further, the protruding portion 4221 has a plurality of grooves 422c with open lower ends. The plurality of grooves 422c are provided at equal intervals in the circumferential direction of the protruding portion 4221. Each groove 422c is inclined upward toward the central axis of the burner head 42.
[0046] As shown in FIG. 7B, when the burner head 42 is placed on the burner body 41, the inclined surface 4221a of the protruding portion 4221 contacts the inclined surface 414a of the inner cylinder portion 414. By the inclined surface 414a of the inner cylinder portion 414 closing the lower end of the groove 422c of the protruding portion 4221, the groove 422c functions as an inner peripheral flame port 422b.
[0047] As shown in FIG. 3, the upper part of the burner head 42 protrudes above the intrusion prevention part 522. The outlet of each outer peripheral flame port 421a is located above the upper end of the intrusion prevention part 522.
[0048] Referring to FIG. 7B, the flow of gas and primary air in the gas burner 40 will be described. The gas and primary air are supplied into the conduit part 412 from the bottom of the conduit part 412. The gas and primary air are mixed in the conduit part 412 to form a mixture. The mixture flows upward in the conduit part 412, passes through the through hole 411a of the bottom plate 411, rises in the space between the inner cylinder part 414 and the outer cylinder part 4131, and exits from the outer peripheral flame ports 421a and the inner peripheral flame ports 422b. When the mixture ejected from the outer peripheral flame port 421a is ignited, a flame comes out outward from the outer peripheral flame port 421a. Secondary air is flowing in the arrangement space 32a of the drain pan 30. The flame ejected from the outer peripheral flame port 421a touches the secondary air and burns completely. Also, when the mixture ejected from the inner peripheral flame port 422b is ignited, a flame comes out inward from the inner peripheral flame port 422b. Secondary air is flowing in the inner space of the inner cylinder part 414. The flame ejected from the inner peripheral flame port 422b touches the secondary air and burns completely.
[0049] Referring to FIG. 7D, the function of the ultraviolet sensor will be described. As shown in FIG. 7D, a part of the ultraviolet rays radiated from the flame ejected from the inner peripheral inflammation port 422b travels downward through the inner space of the inner cylinder portion 414, passes through the through hole 90c of the burner receiver 90 and the through hole 110c of the second support plate 110, and reaches the ultraviolet sensor. By providing the inclined surface 414b, obstacles on the path through which the ultraviolet rays pass can be eliminated, so that the ultraviolet rays are not prevented from reaching the ultraviolet sensor. The state in which the ultraviolet sensor is detecting ultraviolet rays means that the air-fuel mixture ejected from the gas burner 40 is normally ignited and the air-fuel mixture is burning. Therefore, when the ultraviolet sensor detects ultraviolet rays, the supply of gas to the gas burner 40 is continued. On the other hand, the state in which the ultraviolet sensor does not detect ultraviolet rays means that the air-fuel mixture ejected from the gas burner 40 is not ignited (for example, when the flame goes out halfway). Therefore, when the ultraviolet sensor stops detecting ultraviolet rays, the supply of gas to the gas burner 40 is stopped.
[0050] <1-4. Burner Cover> As shown in FIG. 3, the burner cover 50 is placed on the upper end of the inner peripheral wall 32 of the drain pan 30. The burner cover 50 supports the hot plate 60 from below. Also, the burner cover 50 prevents the oil dropped from the food ingredients from adhering to the gas burner 40. The burner cover 50 is made of, for example, a metal material.
[0051] As shown in FIGS. 8A to 8D, the burner cover 50 includes an outer portion 51, an inner portion 52, and a plurality of connecting portions 53. The central axis of the burner cover 50 coincides with the central axis of the inner peripheral wall 32 of the drain pan 30.
[0052] As shown in FIG. 8A, the outer portion 51 includes a first outer portion 511 and a second outer portion 512. The first outer portion 511 is cylindrical. The second outer portion 512 is provided above the first outer portion 511. The second outer portion 512 is inclined upward toward the central axis of the first outer portion 511.
[0053] As shown in FIG. 8A, the inner part 52 includes a frustum-shaped main body part 521 and an intrusion prevention part 522. The central axis of the inner part 52 coincides with the central axis of the first outer part 511. The inner part 52 is located radially inward of the outer part 51. Also, the lower part of the main body part 521 protrudes below the lower end of the outer part 51. The inner part 52 is manufactured, for example, by press-molding a metal material.
[0054] As shown in FIG. 8B, the main body part 521 has a circular opening 521a at the center. The opening 521a is provided in the upper part (flat part) of the main body part 521. No other member is coupled to the upper surface of the main body part 521. Therefore, the upper surface of the main body part 521 is a smooth surface without irregularities.
[0055] The intrusion prevention part 522 prevents dirt such as oil that has fallen on the upper surface of the main body part 521 from moving into the opening 521a. As shown in FIG. 8D, the intrusion prevention part 522 is a cylindrical wall that extends upward from the entire circumference of the inner edge of the opening 521a of the main body part 521. The intrusion prevention part 522 extends parallel to the central axis of the main body part 521. The radially outer end of the intrusion prevention part 522 is located inward of the radially outer end of the first part 611 of the first inclined part 61 of the hot plate 60 described later. Also, as shown in FIG. 3, the upper end of the intrusion prevention part 522 is located below the outlet of the outer peripheral flame port 421a.
[0056] Each coupling part 53 couples the outer part 51 and the inner part 52. As shown in FIG. 8C, in this embodiment, the burner cover 50 includes three coupling parts 53. The three coupling parts 53 are provided at equal intervals in the circumferential direction of the outer part 51. Each coupling part 53 is made of, for example, a thin metal plate.
[0057] As shown in FIGS. 8B and 8C, each coupling part 53 includes an outer coupling part 531 coupled to the first outer part 511 and an inner coupling part 532 coupled to the main body part 521. Each coupling part 53 extends from the first outer part 511 to the lower surface of the main body part 521.
[0058] As shown in FIGS. 8B and 8D, the side end surface 531a of the outer coupling portion 531 is coupled to the first outer portion 511. The upper surface 531b of the outer coupling portion 531 extends horizontally. As will be described later, a hot plate 60 is placed on the upper surface 531b of the outer coupling portion 531.
[0059] As shown in FIGS. 8C and 8D, the inner coupling portion 532 has an upper surface 532a, a lower surface 532b, and a side surface 532c. The upper surface 532a has the same inclination angle as the inclination angle of the lower surface of the main body portion 521 and is coupled to the lower surface of the main body portion 521. The lower surface 532b extends horizontally. As shown in FIG. 8D, the lower surface 532b contacts the upper end of the inner peripheral wall 32 of the drain pan 30. The side surface 532c extends downward from the lower surface 532b parallel to the central axis of the burner cover 50. The side surface 532c of each inner coupling portion 532 is located outside the outer peripheral surface of the inner peripheral wall 32. The gap between each side surface 532c and the outer peripheral surface of the inner peripheral wall 32 is very small. Since the gap between each side surface 532c and the outer peripheral surface of the inner peripheral wall 32 is small, it is possible to prevent dirt such as oil from entering this gap.
[0060] <1-5. Hot Plate> The hot plate 60 emits radiant heat toward the cooking appliance 70 by being heated by the gas burner 40. The radiant heat radiated from the hot plate 60 heats the cooking appliance 70 and the food ingredients on the cooking appliance 70.
[0061] As shown in FIG. 3, the hot plate 60 is placed on the burner cover 50 and is disposed above the gas burner 40. Also, the hot plate 60 is disposed below the cooking appliance 70. The central axis of the hot plate 60 coincides with the central axis of the burner cover 50. The hot plate 60 is manufactured, for example, by press-molding a metal material.
[0062] As shown in FIGS. 9A to 9C, the hot plate 60 includes a first inclined portion 61, a second inclined portion 62, a valley portion 63, a third inclined portion 64, and a placement portion 65.
[0063] As shown in FIGS. 9A and 9C, the first inclined portion 61 is conical. That is, the first inclined portion 61 is inclined downward from the center of the hot plate 60 toward the radially outer side. The first inclined portion 61 has a first portion 611 and a second portion 612 located radially outward of the first portion 611. The first portion 611 does not have a through hole. On the other hand, the second portion 612 has a plurality of ventilation holes 612a through which hot air passes.
[0064] The diameter of the lower end of the first portion 611 is larger than the diameter of the intrusion prevention portion 522 (see FIG. 8B). Therefore, as shown in FIG. 3, when the hot plate 60 is placed on the burner cover 50, the first portion 611 covers the entire opening 521a and the burner head 42. As already described, the first portion 611 does not have a through hole. Therefore, even if the oil of the food material drops on the first portion 611, the oil does not drop onto the burner head 42 through the first portion 611. A part of the oil that has dropped on the first portion 611 flows along the inclined surface of the first portion 611 to the second portion 612 and drops onto the main body portion 521 through the ventilation holes 612a of the second portion 612.
[0065] As shown in FIGS. 9A to 9C, the second inclined portion 62 is located radially outward of the first inclined portion 61. The second inclined portion 62 is inclined upward toward the radially outer side. The second inclined portion 62 has a plurality of ventilation holes 62a through which hot air passes.
[0066] As shown in FIGS. 9C and 9D, the valley portion 63 is a portion between the first inclined portion 61 and the second inclined portion 62 and is a portion recessed downward. The valley portion 63 has a curved bottom or a flat bottom. A through hole is not provided in the bottom of the valley portion 63. Further, as shown in FIGS. 9A and 9B, ribs 63a are provided in the valley portion 63. As shown in FIG. 9E, the rib 63a is a portion of the valley portion 63 processed into a mountain shape so as to protrude upward by press molding or the like. By providing the ribs 63a, the oil that has dropped on the ribs 63a can be guided to the ventilation holes 62a or the ventilation holes 612a existing near the ribs 63a.
[0067] The third inclined portion 64 inclines downward from the upper end of the second inclined portion 62 toward the radially outer side. The third inclined portion 64 has a plurality of through holes 64a. A jig (for example, a gripper) for lifting and removing the hot plate 60 is inserted into the through holes 64a.
[0068] The placement portion 65 extends from the lower end of the third inclined portion 64 parallel to the central axis of the hot plate 60 downward beyond the bottom of the trough portion 63. The lower end of the placement portion 65 is placed on the upper surface 531b (see FIG. 8B) of the outer coupling portion 531 of the burner cover 50.
[0069] <1-6. Top Ring> As shown in FIGS. 2 and 3, the top ring 80 is disposed above the drain pan 30 and the support member 120. The top ring 80 includes an upper wall 81, an outer peripheral wall 82, an inner peripheral wall 83, and a partition wall 84.
[0070] As shown in FIG. 2, the upper wall 81 is in a donut shape. The upper wall 81 has a plurality of first suction ports 81a. The plurality of first suction ports 81a communicate with a space S (see FIG. 3) between the outer peripheral wall 33 of the drain pan 30 and the side wall 12 of the casing 10. When the exhaust device is activated, outside air is sucked from the plurality of first suction ports 81a.
[0071] As shown in FIG. 3, the outer peripheral wall 82 extends downward from the outer end portion of the upper wall 81 and contacts the step 120a of the support member 120.
[0072] The inner peripheral wall 83 extends downward from the inner end portion of the upper wall 81 and is located inside the outer peripheral wall 33 of the drain pan 30. The inner peripheral wall 83 has a plurality of second suction ports 83a. The plurality of second suction ports 83a communicate with the space S (see FIG. 3). When the exhaust device is activated, the smoke generated when the food is cooked is sucked from the plurality of second suction ports 83a and flows through the space S to the filter 20.
[0073] The partition wall 84 extends downward from a position inside the first suction port 81a of the upper wall 81 and partitions the space between the inner peripheral wall 83 and the support member 120. Due to the provision of the partition wall 84, the outside air sucked from the first suction port 81a flows along the inner peripheral surface of the side wall 12 of the casing 10 and flows closer to the inner peripheral surface of the side wall 12 than the smoke sucked from the second suction port 83a. Therefore, the outside air sucked from the first suction port 81a can prevent the smoke sucked from the second suction port 83a from contacting the inner peripheral surface of the side wall 12. As a result, it is possible to prevent dirt from adhering to the inner peripheral surface of the side wall 12.
[0074] <2. Effect> The left diagram of FIG. 10 shows an enlarged partial view corresponding to FIG. 9D of the hot plate according to the comparative example. As shown in the left diagram of FIG. 10, the hot plate of the comparative example has a vent 62a' extending from the second portion 612' to the trough 63' and the second inclined portion 62'. The right diagram of FIG. 10 is an enlarged partial view of the hot plate 60 according to the embodiment and is the same diagram as FIG. 9D. In FIG. 10, the flow of oil is schematically shown by arrows. In the hot plate of the comparative example, the oil that has fallen onto the second inclined portion 62' flows along the second inclined portion 62' and jumps out from the vent 62a' in the inclined direction of the second inclined portion 62'. Therefore, the oil flowing on the second inclined portion 62' is likely to scatter toward the central axis of the hot plate. That is, the oil flowing on the second inclined portion 62' tends to scatter toward the burner head 42, and as a result, oil is likely to adhere to the burner head 42. On the other hand, as shown in the right diagram of FIG. 10, the oil flowing on the second inclined portion 62 of the hot plate 60 of the embodiment is deflected downward by the trough 63 and falls from the vent 62a. In this way, since there is no through hole provided at the bottom of the trough 63, the oil flowing on the second inclined portion 62 is less likely to scatter toward the burner head 42. As a result, the amount of oil adhering to the burner head 42 can be reduced, and therefore, the dirt adhering to the burner head 42 can be reduced.
[0075] As shown in FIG. 3, since the burner cover 50 is provided with the intrusion prevention portion 522, when oil drops radially outward of the intrusion prevention portion 522, the intrusion prevention portion 522 can block the oil so that the oil does not fall into the opening portion 521a. Thereby, it is possible to prevent the oil from adhering to the burner head 42.
[0076] As shown in FIG. 3, the upper end of the intrusion prevention portion 522 is located below the outlet of the outer peripheral flame port 421a. Thereby, it is possible to prevent the flame ejected from the outer peripheral flame port 421a from interfering with the intrusion prevention portion 522.
[0077] As shown in FIG. 7B, the first inner peripheral surface 4211 is located radially outward of the second inner peripheral surface 4213. Therefore, the gap G between the first inner peripheral surface 4211 and the outer peripheral surface of the outer cylinder portion 4131 is larger than the gap between the second inner peripheral surface 4213 and the outer peripheral surface of the outer cylinder portion 4131. Thereby, even if oil enters the gap G and solidifies, the possibility that the burner main body 41 and the burner head 42 are fixed together can be reduced. By making the size d1 of the gap G 1.5 mm or more, the fixation between the burner main body 41 and the burner head 42 can be further prevented.
[0078] By making the size d1 of the gap G 1.5 mm or more, it is possible to prevent the oil flowing along the outer peripheral surface of the peripheral wall 421 to the vicinity of the upper end of the inclined upper surface 4132a from entering the gap G.
[0079] By making the vertical length L1 (see FIG. 7D) of the first inner peripheral surface 4211 2 mm or more, the vertical length of the gap G also becomes larger. As a result, the fixation between the burner main body 41 and the burner head 42 can be further prevented.
[0080] By making the distance d2 (see FIG. 7B) between the lower end of the burner head 42 and the upper end of the inclined upper surface 4132a of the protruding portion 4132 3 mm or more, it is possible to prevent the oil flowing along the outer peripheral surface of the peripheral wall 421 to the vicinity of the upper end of the inclined upper surface 4132a from entering the gap G. Thereby, the fixation between the burner main body 41 and the burner head 42 can be prevented.
[0081] As shown in Table 1 below, when the vertical length L1 is 2 mm or more, it is possible to prevent oil from entering the gap G. Further, when the vertical length L2 (see FIG. 7D) of the second inner peripheral surface 4213 is 10 mm or more, it is possible to sufficiently secure the covering dimension of the burner head 42 with respect to the burner body 41, so that the burner head 42 can be prevented from unexpectedly coming off the burner body 41.
[0082] JPEG2025095797000002.jpg32125
[0083] <3. Modification Example> The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. Hereinafter, modification examples of the present invention will be described. The modification examples described below can be applied to the above-described embodiment alone or in appropriate combination without departing from the gist of the present invention.
[0084] (3-1) The first inner peripheral surface 4211 may be a tapered surface whose diameter gradually increases downward.
[0085] (3-2) The intermediate inner peripheral surface 4212 may be inclined upward or downward toward the central axis of the burner head 42.
[0086] (3-3) By recessing a portion of the outer peripheral surface of the outer cylinder portion 4131 that faces the first inner peripheral surface 4211 and a portion below the facing portion toward the central axis of the outer cylinder portion 4131, a gap G may be provided between the outer peripheral surface of the outer cylinder portion 4131 and the first inner peripheral surface 4211. In this case, the intermediate inner peripheral surface 4212 may not be provided, and the first inner peripheral surface 4211 may be flush with the second inner peripheral surface 4213.
[0087] (3-4) The intrusion prevention portion 522 may be inclined so as to approach the central axis of the burner cover 50 or away from the central axis of the burner cover 50.
[0088] (3-5) The intrusion prevention part 522 does not necessarily extend upward from the inner edge of the opening 521a of the main body part 521, and may extend upward from the main body part 521 radially outward of the opening 521a.
[0089] <4. Disclosure of the Invention> This application also provides an invention in the following aspects. (Item 1) A hot plate that can be arranged above a gas burner for a cooking appliance and can be arranged below a cooking appliance for placing food ingredients, a first inclined part that inclines downward toward the radially outer side, a second inclined part that is provided radially outward of the first inclined part and inclines upward toward the radially outer side, a valley part provided between the first inclined part and the second inclined part, and comprising, the valley part does not have a through hole, hot plate.
[0090] (Item 2) A burner cover for a gas burner for a cooking appliance, an outer part, an inner part arranged more inward than the outer part, a connecting part connecting the outer part and the inner part, and comprising, the inner part has an opening into which the upper part of the gas burner can be inserted, and an intrusion prevention part that extends upward and prevents the intrusion of oil into the opening, burner cover.
[0091] (Item 3) The intrusion prevention part is a cylindrical wall that extends upward from the entire circumference of the inner edge of the opening, The burner cover according to Item 2.
[0092] (Item 4) A gas burner for a cooking appliance, a burner body, a burner head that covers the upper part of the burner body, comprising The burner body includes an outer cylinder portion, The burner head includes a first inner peripheral surface provided at the lower end of the burner head and a second inner peripheral surface located above and radially inward of the first inner peripheral surface. The first inner peripheral surface and the second inner peripheral surface are located outside the outer peripheral surface of the outer cylinder portion. A gap is provided between the first inner peripheral surface and the outer peripheral surface of the outer cylinder portion. Gas burner.
[0093] (Item 5) The size of the gap is 1.5 mm or more. The gas burner according to item 4.
[0094] (Item 6) The outer cylinder portion is cylindrical. The first inner peripheral surface is a cylindrical surface extending parallel to the outer peripheral surface of the outer cylinder portion. The gas burner according to item 4 or 5.
[0095] (Item 7) The vertical length of the first inner peripheral surface is 2 mm or more. The gas burner according to any one of items 4 to 6.
[0096] (Item 8) The burner head includes an intermediate inner peripheral surface. The intermediate inner peripheral surface extends from the upper end of the first inner peripheral surface toward the outer cylinder portion. The gas burner according to any one of items 4 to 7.
[0097] (Item 9) The vertical length of the second inner peripheral surface is 10 mm or more. The gas burner according to any one of items 4 to 8.
[0098] (Item 10) The burner body includes a protruding portion having an inclined upper surface. The distance between the upper end of the inclined upper surface and the lower end of the burner head is 3 mm or more. The gas burner according to any one of claims 4 to 9.
[0099] (Claim 11) The cooking appliance including the hot plate according to claim 1.
[0100] (Claim 12) The cooking appliance including the burner cover according to claim 2 or 3.
[0101] (Claim 13) The cooking appliance further includes a gas burner having a plurality of outer peripheral flame ports and inserted into the opening, The upper end of the intrusion prevention portion is located below the outlets of the plurality of outer peripheral flame ports. The cooking appliance according to claim 12.
[0102] (Claim 14) The cooking appliance including the gas burner according to any one of claims 4 to 10.
[0103] (Claim 15) The hot plate according to claim 1, The burner cover according to claim 2 or 3, and the cooking appliance including the above.
[0104] (Claim 16) The hot plate according to claim 1, The gas burner according to any one of claims 4 to 10, and the cooking appliance including the above.
[0105] (Claim 17) The burner cover according to claim 2 or 3, The gas burner according to any one of claims 4 to 10, and the cooking appliance including the above.
[0106] (Claim 18) The hot plate according to claim 1, The burner cover according to claim 2 or 3, The gas burner according to any one of items 4 to 10, and A cooking appliance comprising the same.
Explanation of Signs
[0107] 1000 Cooking appliance 40 Gas burner 41 Burner body 4131 Outer cylinder part 4132 Protruding part 4132a Inclined upper surface 42 Burner head 421a Outer peripheral flame port 4211 First inner peripheral surface 4212 Intermediate inner peripheral surface 4213 Second inner peripheral surface 50 Burner cover 51 Outer part 52 Inner part 521a Opening 522 Invasion prevention part 53 Coupling part 60 Hot plate 61 First inclined part 62 Second inclined part 63 Valley part 70 Cooking utensil G Gap d1 Size of the gap d2 Distance between the upper end of the inclined upper surface and the lower end of the burner head L1 Vertical length of the first inner peripheral surface L2 Vertical length of the second inner peripheral surface