Fire regulating valve for double-sided barbecue grill

Abstract

The invention provides a fire adjusting valve for a double-sided barbecue grill, which has a valve plate that rotates in contact with a fixed plate, and switches the fire of two burners, an upper fire burner and a lower fire burner, using the rotation of the valve plate, and can switch the fire of the two burners in combination to nine kinds. The fixed plate has weak fire and strong fire passage holes connected to the upper fire burner on two radii that are separated by 2θ1, and weak fire and strong fire passage holes connected to the lower fire burner. The valve plate has a circular arc-shaped valve hole with a central angle of θ2 (θ2 > 2θ1) on the arrangement circle of the weak fire passage holes, a circular arc-shaped valve hole with a central angle of θ4 (θ1 < θ4 < θ3) on the arrangement circle of the strong fire passage holes, and a valve hole that extends from the circumferential center of the valve hole to the other side by about θ3.

Description

TECHNICAL FIELD

[0001] The present application relates to a fire adjusting valve for a double-sided grill having an upper fire burner and a lower fire burner. BACKGROUND

[0002] Conventionally, as such a fire adjusting valve, there is known one having a fixed plate and a circular plate-shaped valve plate that is rotationally driven by a motor in a state of contact with one face of the fixed plate, a circular region of the fixed plate that is in contact with the valve plate is divided into two semicircular regions of a first and a second, when one of the upper fire burner and the lower fire burner is taken as a first burner and the other is taken as a second burner, in each of the first and second semicircular regions, there are formed a weak fire passage hole and a strong fire passage hole that are connected to each of the first and second burners, and a hole that is open by overlapping with a valve hole formed in the valve plate among these passage holes is switched by rotation of the valve plate, whereby the fire of each of the first and second burners is switched (for example, refer to Patent Documents 1 and 2).

[0003] Here, according to the fire adjusting valve of the above-described conventional example, only one of the two burners of the first and second can be extinguished in use of the grill, and the combination of the fire including the extinguishing of the two burners of the first and second can be switched to seven kinds. However, in order to broaden the range of cooking, it is desirable to be able to switch the fire of each of the first and second burners to three kinds of extinguishing, weak fire, and strong fire, respectively, and thereby be able to switch the combination of the fire of the two burners of the first and second to a maximum of 9 kinds of 3 x 3.

[0004] PATENT LITERATURE

[0005] Patent Document 1: Japanese Patent Application Publication No. 2012-223361

[0006] Patent Document 2: Japanese Patent Application Publication No. 2019-17766 SUMMARY

[0007] The present application, in view of the above-described problems, aims to provide a fire adjusting valve for a double-sided grill that can switch the combination of the fire of the two burners of the first and second to a maximum of 9 kinds.

[0008] To solve the above problems, the fire adjusting valve for a double-sided grill according to the present application is provided with an upper fire burner and a lower fire burner, a fixed plate, and a circular plate-shaped valve plate that is rotationally driven by a motor in contact with one side of the fixed plate. A circular region of the fixed plate that is in contact with the valve plate is divided into two semicircular regions, a first and a second. When one of the upper fire burner and the lower fire burner is used as a first burner and the other is used as a second burner, the first and second semicircular regions are formed with a strong fire passage hole and a weak fire passage hole that are connected to the first and second burners, respectively. The holes that are open in the valve plate by overlapping the valve holes of the valve plate are switched by rotation of the valve plate, thereby switching the fire of the first and second burners. The first semicircular region of the fixed plate is formed with a first weak fire passage hole that is located at a position on a radial line that departs from a boundary line between the first and second semicircular regions by a prescribed first angle toward one side of the circumference, and is connected to the first burner, and a first strong fire passage hole that is offset radially from the first weak fire passage hole and is connected to the first burner. The second semicircular region of the fixed plate is formed with a second weak fire passage hole that is located at a position on a radial line that departs from the boundary line between the first and second semicircular regions by the first angle toward the other side of the circumference, and is connected to the second burner, and a second strong fire passage hole that is offset radially from the second weak fire passage hole and is connected to the second burner. The first and second weak fire passage holes are located at positions on a first circumference that is concentric with the center of rotation of the valve plate, and the first and second strong fire passage holes are located at positions on a second circumference that is concentric with the center of rotation of the valve plate and has a different diameter from the first circumference. The valve plate is formed with a first valve hole that is a circular arc, a second valve hole that is a circular arc, and a third valve hole. The first valve hole is located at a position on a circumference that is concentric with the first circumference and has the same diameter, and has a central angle that is a prescribed second angle that is greater than twice the first angle. The second valve hole is located at a position on a circumference that is concentric with the second circumference and has the same diameter, and extends from a position that departs from the center of the first valve hole by a prescribed third angle that is greater than the first angle and smaller than half the second angle toward one side of the circumference, and further extends toward the other side of the circumference, and has a central angle that is a prescribed fourth angle that is greater than or equal to the first angle and smaller than the third angle. The third valve hole is located at a position on a circumference that is concentric with the second circumference and has the same diameter, and is located at or near a position that departs from the center of the first valve hole by the third angle toward the other side of the circumference. The first to third valve holes do not overlap any of the first and second weak fire passage holes and the first and second strong fire passage holes. From a closed state in which the first and second burners are extinguished, the valve plate is rotated toward one side of the circumference, thereby sequentially switching to nine states in which the first valve hole overlaps the second weak fire passage hole, and only the second burner burns with weak fire.The first valve port overlaps with the second weak-flame passage port, and the second valve port overlaps with the second strong-flame passage port, resulting in only the second burner burning at a strong flame; the first valve port overlaps with both the first and second weak-flame passage ports, and the second valve port overlaps with the second strong-flame passage port, resulting in the second burner burning at a strong flame, while the first burner burns at a weak flame; the first valve port overlaps with both the first and second weak-flame passage ports, and the second valve port moves away from the second strong-flame passage port and overlaps with the first strong-flame passage port, resulting in the second burner burning at a weak flame, while the first burner burns at a strong flame; the first valve port overlaps with both the first and second weak-flame passage ports, and the second valve port overlaps with the first strong-flame passage port, furthermore... The third valve hole overlaps with the second high-fire passage hole, thus the first and second burners burn at high fire; the first valve hole overlaps with the first and second low-fire passage holes, and the second and third valve holes respectively exit from the first and second high-fire passage holes, thus the first and second burners burn at low fire; the first valve hole exits from the second low-fire passage hole and overlaps only with the first low-fire passage hole, and the third valve hole overlaps with the first high-fire passage hole, thus only the first burner burns at high fire; the first valve hole overlaps only with the first low-fire passage hole, and the third valve hole exits from the first high-fire passage hole, thus only the first burner burns at low fire; and the closed state.

[0009] According to the present invention, the flame combination of the first and second burners can be switched to the maximum of nine, thereby expanding the range of cooking methods. Attached Figure Description

[0010] Figure 1 This is a cross-sectional side view of an example of a double-sided barbecue grill with a flame control valve that applies an embodiment of the present invention.

[0011] Figure 2 It is along Figure 1 The cross-sectional view obtained by cutting along line II-II.

[0012] Figure 3 (a) is a three-dimensional view of the grill plate supported on the grill pan. Figure 3 (b) is a three-dimensional view of the grill net being supported on the grill plate.

[0013] Figure 4 This is a perspective view of a valve unit assembled with a fire control valve according to an embodiment of the present invention.

[0014] Figure 5 It is along Figure 4 The sectional side view is obtained by cutting along line V-V.

[0015] Figure 6(a) indicates along Figure 5 A sectional top view of the forced opening device of the electromagnetic safety valve obtained by cutting along line VI-VI. Figure 6 (b) is a sectional top view showing the operating state of the forced valve opening device.

[0016] Figure 7 It is a three-dimensional diagram showing the disassembled state of the forced valve opening device.

[0017] Figure 8 This is a perspective view of the gasket and the upper cover portion provided on the fire control valve according to an embodiment of the present invention, viewed from a slightly lower angle.

[0018] Figure 9 This is a perspective view of the fixing plate and valve plate of the fire control valve according to an embodiment of the present invention, viewed from an oblique top.

[0019] Figure 10 This is a top view of the valve plate.

[0020] Figure 11 This is an explanatory diagram showing how the fire intensity is switched by rotating the valve plate.

[0021] Explanation of symbols in attached drawings

[0022] 100…Double-sided grill; 108…Upper burner; 109…Lower burner; 4…Flame control valve; 41…Fixing plate; 41a…First semicircular area; 41b…Second semicircular area; 4111…First weak flame passage hole; 4112…Second weak flame passage hole; 4121…First strong flame passage hole; 4122…Second strong flame passage hole; 42…Valve plate; 421…First valve hole; 422…Second valve hole; 423…Third valve hole; 7…Motor; S1…First circumference; S2…Second circumference; θ1…First angle; θ2…Second angle; θ3…Third angle; θ4…Fourth angle. Detailed Implementation

[0023] Reference Figure 1 , Figure 2 100 indicates a double-sided grill 100 assembled to a gas stove (not shown). The grill 100 includes a grill cabinet 101 disposed within the main body of the stove (not shown) and a grill door 102 for opening and closing the front opening of the grill cabinet 101. Figure 3 The plate-shaped grill plate 104 shown in (a) or Figure 3The grill rack 105 shown in (b) is stored in the grill cabinet 101 together with the grill plate 103 as a container for the food to be cooked. The grill plate 103 is supported by a plate support frame 106 connected to the grill door 102. Support frames 107 are erected at the front and back of the plate support frame 106 to support the grill plate 104 and the grill rack 105. Furthermore, by opening the grill door 102 forward, the grill plate 103, along with the grill plate 104 or the grill rack 105, is pulled out to the front of the grill cabinet 101.

[0024] An upper-fire burner 108 is provided on the top 101a of the grill 101. The upper-fire burner 108 is a surface-fire burner having a ceramic combustion plate 108a with multiple flame holes (not shown). The upper-fire burner 108 is mounted on the top 101a of the grill 101 with the combustion plate 108a facing downwards. An ignition electrode (not shown) and a thermocouple for flame monitoring are attached to the upper-fire burner 108.

[0025] A lower burner 109, longer in the front-to-back direction, is disposed on the lower part of both sides of the grill 101 (lower than the grill plate 104 and the grill rack 105), and the lower burner 109 has a flame port 109a opening towards the inner side of the lateral direction. A target portion 110a is provided at the rear of the lower burner 109, opposite to the ignition electrode 110. The lower burner 109 is ignited by a spark discharge between the ignition electrode 110 and the target portion 110a. In addition, a thermocouple 111 is disposed facing the flame port 109a at the front of the lower burner 109 for misfire detection.

[0026] On the inner surfaces of the side walls 101b on both sides of the grill cabinet 101, there are: a secondary air guide plate 112, which extends laterally inward above the lower burner 109; and a heat insulation plate 113, which extends laterally inward below the lower burner 109 and suppresses heating of the grill plate 103. Additionally, there is an exhaust passage 114 extending rearward from the upper rear end of the grill cabinet 101, and a temperature sensor 115 that detects the cabinet temperature below the grill plate 104. Furthermore, a supplementary combustion burner 116 is disposed on the lower surface of the exhaust passage 114 to burn off the oil fumes contained in the combustion exhaust. The supplementary combustion burner 116 is a surface combustion burner having a ceramic combustion plate 116a with multiple flame holes (not shown). Furthermore, the afterburner 116 is installed on the lower surface of the exhaust passage 114 with the combustion plate 116a facing upwards.

[0027] fuel gas Figure 4The valve unit 1 shown below is supplied to the two burners 108 and 109 for the upper and lower burners, as well as the supplementary burner 116. The valve unit 1 includes an upstream electromagnetic safety valve 3 and a downstream flame regulating valve 4 assembled in the valve housing 2. The valve housing 2 has a gas inlet 21, a gas outlet 22 for the upper burner, a gas outlet 23 for the lower burner, and a gas outlet 24 for the supplementary burner.

[0028] Reference Figure 5 The electromagnetic safety valve 3 includes: a valve body 32 within a valve chamber 25, which is capable of sitting on a valve seat 31, and the valve seat 31 is located at the downstream end of the valve chamber 25 within a valve housing 2 that communicates with the gas inlet 21; an adsorption plate 34 connected to the valve body 32 by means of a valve shaft 33 extending in the opposite direction to the valve seat 31; an electromagnet 35 opposite to the adsorption plate 34; and a valve spring 36 that applies force to the valve body 32 toward the closed position where it is seated on the valve seat 31. Furthermore, the adsorption plate 34 is connected to the valve shaft 33 in a manner that allows it to be slightly tilted axially. Additionally, a valve seat component 31a, on which the valve seat 31 is formed, is installed within the valve housing 2.

[0029] When the grill 100 is ignited, the electromagnetic safety valve 3 is forcibly opened by the forced opening device 5. The forced opening device 5 includes: a push rod 6 that can abut against the valve body 32 from the valve seat 31 side, a motor 7, and a cam mechanism 8 that converts the rotational motion of the motor 7 into axial linear motion of the push rod 6. Furthermore, the axial direction of the push rod 6 (…) Figure 5 The right end of the valve body 32 is abutted against the valve body 32, and the valve body 32 is pushed from the closed position to the open position where the adsorption plate 34 abuts against the electromagnet 35. In this state, the electromagnet 35 is energized, thereby adsorbing and holding the valve body 32 in the open position.

[0030] However, conventional cam mechanisms consist of a cam body that is rotated and driven by a motor 7. A radial protrusion formed on the outer peripheral surface of the cam body abuts against the axial end of the push rod 6, pushing the push rod 6 axially. However, according to this configuration, since the protrusion abuts against the axial end of the push rod 6 from the radial side, a pushing force in the radial direction acts on that end. Therefore, the push rod 6 sometimes tilts radially by the amount of sliding clearance, causing the valve shaft 33 to also tilt slightly radially. Furthermore, after the valve body 32 is held in the open position, once the push rod 6 is released from its pressure on the valve body 32, the radial tilt of the valve shaft 33 is corrected under the force of the valve spring 36. At this time, a radial scraping force acts on the suction plate 34, which sometimes causes the suction plate 34 to detach from the electromagnet 35, or promotes wear on the suction surface between the suction plate 34 and the electromagnet 35.

[0031] Therefore, in this embodiment, to avoid such an undesirable situation, the cam mechanism 8 is configured as follows. That is, in this embodiment, the cam mechanism 8 consists of a rotating body 81 that is driven by a motor 7, and a cam body 82, wherein the cam body 82 has the following characteristics: it is freely movable in the axial direction of the push rod 6, and is located opposite to the axial direction of the push rod 6 (…). Figure 5 The rod abutment part 821 is located at the end of the left side of the middle section.

[0032] Reference Figure 6 , Figure 7 A non-circular fitting hole 811 is formed at the center of rotation of the rotating body 81, and the rotating shaft 72, which is connected to the output shaft 71 of the motor 7, can fit into the fitting hole 811. Moreover, the rotating body 81 is driven to rotate by the rotation of the motor 7 via the output shaft 71 and the rotating shaft 72. In addition, a crank pin 812 that is eccentric relative to its center of rotation is provided in the rotating body 81.

[0033] When the axial direction of the push rod 6 is taken as the X-axis, and the horizontal direction orthogonal to the axial direction of the push rod 6 is taken as the Y-axis, the cam body 82 is housed in the gas chamber 26 downstream of the electromagnetic safety valve 3 in a manner that allows it to move freely in the X-axis direction. This gas chamber 26 is formed in the portion directly below the flame regulating valve 4 within the valve housing 2. Specifically, guide surfaces 261 parallel to the X-axis are formed on the sidewalls of the gas chamber 26 in the Y-axis direction, and the side surfaces 822 of the cam body 82 in the Y-axis direction are also formed as surfaces parallel to the X-axis. Furthermore, the cam body 82 is guided by the guide surfaces 261 and moves in the X-axis direction.

[0034] Furthermore, an upright wall 823 is provided on the cam body 82 at one end edge in the X-axis direction. Moreover, a rod abutment portion 821, which is formed into an arc shape protruding in the X-axis direction, is provided at the center of the surface of the upright wall 823 facing the X-axis direction in the Y-axis direction. By forming the rod abutment portion 821 into such an arc shape, even if the cam body 82 is tilted by the amount of sliding clearance, the pushing stroke of the push rod 6 can be kept constant.

[0035] On the surface of the upright wall 823 facing the X-axis, a cam portion 824 is provided, positioned relative to the surface including the axis of the push rod 6 and the rotation center of the rotating body 81, on the Y-axis side, and for the crank pin 812 to abut against. This cam portion 824 is shaped as described below, that is, accompanying the rotating body 81 in one direction (… Figure 6 The crank pin 812 rotates in one direction (counterclockwise) when the crank pin 812 rotates, thereby causing the cam body 82 to move in the X-axis direction. Furthermore, when the crank pin 812 rotates from... Figure 6 The position shown in (a) is rotated in one direction to reach a position containing, as shown in (a).Figure 6 When the axis of the push rod 6 shown in (b) is aligned with the plane containing the rotation center of the rotating body 81, the push rod 6 is pushed to the end of its stroke in the X-axis direction. Before it is about to get close to that end of its stroke, the valve body 32 of the electromagnetic safety valve 3 reaches the open position.

[0036] Furthermore, on the surface of the upright wall 823 facing the X-axis direction, in addition to the aforementioned cam portion 824, a second cam portion 824' is provided, which is symmetrical to the cam portion 824 with respect to the surface including the axis of the push rod 6 and the rotation center of the rotating body 81. Therefore, even if the rotating body 81 is moved in the other direction ( Figure 6 Rotating the crank pin 812 clockwise causes it to abut against the second cam portion 824', which also allows the cam body 82 to move in the X-axis direction. Furthermore, after holding the valve body 32 in the open position, rotating the crank pin 812 from... Figure 6 Rotating the position shown in (b) in one direction or the other releases the push rod 6 from pushing the valve body 32.

[0037] According to the cam mechanism 8 of this embodiment, the push rod 6 is pushed towards the X-axis direction by the cam body 82 moving in the X-axis direction via the rod abutment portion 821. Therefore, no force is applied to the push rod 6 to drive it to tilt radially, thus preventing the valve shaft 33 from tilting radially due to the push rod 6 tilting radially. Therefore, when the push rod 6 is released from pushing the valve body 32, no radial scraping force is applied to the adsorption plate 34, thus preventing the adsorption plate 34 from detaching from the electromagnet 35 due to this scraping force, or preventing wear on the adsorption surface between the adsorption plate 34 and the electromagnet 35.

[0038] Furthermore, the push rod 6 is composed of a first rod portion 61 that can be abutted by the rod abutment portion 821 of the cam body 82, a second rod portion 62 that can abut against the valve body 32, and a buffer spring 63 disposed between the first and second rod portions 61 and 62. The first rod portion 61 has a stop portion 611 that can abut against three circumferential locations of the stepped portion 271 from one side in the X-axis direction, and a claw receiving portion 612 located near the stop portion 611 in the circumferential direction. The stepped portion 271 is formed in a passage 27 within the valve housing 2 that connects the electromagnetic safety valve 3 to the gas chamber 26. Moreover, the first rod portion 61 is pushed against the stroke end position in the X-axis direction where the stop portion 611 abuts against the stepped portion 271 by a return spring 64 disposed between the first rod portion 6 and the valve seat component 31a. In addition, the second rod portion 62 is provided with three claw plates 621 extending in the circumferential direction in the opposite direction of the X-axis. The second rod portion 62 is held in a state where the claw at the front end of the claw plate 621 is engaged with the claw receiving portion 612 of the first rod portion 61 by the force of the buffer spring 63.

[0039] Here, the force of the buffer spring 63 is greater than the combined force of the return spring 64 and the valve spring 36. Therefore, when the first lever 61 is pushed towards the X-axis direction by the lever abutment 821 due to the movement of the cam body 82 towards the X-axis, the second lever 62 also moves towards the X-axis direction along with the first lever 61. Furthermore, when the valve body 32 reaches the open position, and the second lever 62 can no longer move further towards the X-axis, but the cam body 82 moves further towards the X-axis, as... Figure 6 As shown in (b), the first rod 61 will compress the buffer spring 63 and be pushed to the end of the stroke in the X-axis direction.

[0040] Next, refer to Figures 8 to 10 The fire control valve 4 is described below. The fire control valve 4 includes a fixed plate 41 fixed inside the valve housing 2 and a circular valve plate 42 facing the gas chamber 26. The valve plate 42 is rotated by a motor 6 while in contact with one side (the lower surface) of the fixed plate 41. The fixed plate 41 contacts the lower surface of the upper cover portion 28 of the valve housing 2 via a gasket 43. The upper cover portion 28 has a gas outlet 22 for the upper burner, a gas outlet 23 for the lower burner, and a gas outlet 24 for the supplementary combustion burner.

[0041] The circular area in contact with the valve plate 42 of the fixed plate 41 is divided into two semicircular areas 41a and 41b. In the first semicircular area 41a, there are a weak flame passage hole 4111 and a strong flame passage hole 4121 connected to the upper burner 108, which is the first burner. In the second semicircular area 41b, there are a weak flame passage hole 4112 and a strong flame passage hole 4122 connected to the lower burner 109, which is the second burner. Specifically, in the first semicircular region 41a of the fixed plate 41, there are: a first weak flame passage hole 4111, which is located on a radial line from the boundary line between the first and second semicircular regions 41a and 41b toward the circumferential direction (clockwise when viewed from above) away from the predetermined first angle θ1, and is connected to the upper burner 108; and a first strong flame passage hole 4121, which is radially offset from the first weak flame passage hole 4111, and is connected to the upper burner 108. Additionally, in the second semicircular region 41b of the fixed plate 41, there are: a second weak flame passage hole 4112, located on a radial line from the boundary line between the first and second semicircular regions 41a and 41b toward the other side circumferentially (counterclockwise when viewed from above) away from the aforementioned first angle θ1, and connected to the lower burner 109; and a second strong flame passage hole 4122, which is radially offset from the second weak flame passage hole 4112, and connected to the lower burner 109. The first and second weak flame passage holes 4111 and 4112 are located on a first circumference S1 concentric with the rotation center of the valve plate 42, and the first and second strong flame passage holes 4121 and 4122 are located on a second circumference S2 concentric with the rotation center of the valve plate 42 and with a diameter larger than the first circumference S1 (see reference). Figure 10 ).

[0042] In addition, such as Figure 8 As shown, the gasket 43 has a first elongated hole 431 that communicates with the first weak flame and first strong flame passage holes 4111 and 4121 and is radially longer, and a second elongated hole 432 that communicates with the second weak flame and second strong flame passage holes 4112 and 4122 and is radially longer. Additionally, on the lower surface of the upper cover 28, in contact with the gasket 43, a first recess 281 that communicates with the first elongated hole 431 and a second recess 282 that communicates with the second elongated hole 432 are formed. Furthermore, an upper burner gas outlet 22 and a supplementary burner gas outlet 24 are provided in communication with the first recess 281, and a lower burner gas outlet 23 is provided in communication with the second recess 282.

[0043] A boss 42a is provided on the lower surface of the valve plate 42 for fitting a non-circular cross-section portion of the rotating shaft 72. Furthermore, the valve plate 42 is driven to rotate by the motor 7 via the output shaft 71 and the rotating shaft 72. Additionally, the valve plate 42 is subjected to upward force by a spring 44 clamped between the valve plate 42 and the rotating body 81, so that it contacts the fixed plate 41.

[0044] Reference Figure 9 , Figure 10 On the valve plate 42, the following valve holes are formed as valve holes: a first arc-shaped valve hole 421, a second arc-shaped valve hole 422, and a third arc-shaped valve hole 423. The first valve hole 421 is located on a circumference concentric with and of the same diameter as the first circumference S1, and its central angle is a predetermined second angle θ2, which is more than twice the first angle θ1. The second valve hole 422 is located on a circumference concentric with and of the same diameter as the second circumference S2, and the second valve hole 422 extends from the circumferential center of the first valve hole 421 towards the circumferential direction. Figure 10 (The middle direction is clockwise) and starting from the position defined as the third angle θ3, which is larger than the first angle θ1 and smaller than half of the second angle θ2, it moves circumferentially in the other direction ( Figure 10 Extending in a counter-clockwise direction, its central angle is a fourth angle θ4 defined as greater than or equal to the first angle θ1 and less than the third angle θ3; the third valve hole 423 is on a circumference concentric with and of the same diameter as the second circumference S2, and is located at or near a position that extends circumferentially from the circumferential center of the first valve hole 421 toward the other circumferential direction away from the third angle θ3. Furthermore, in this embodiment, although the third valve hole 423 is formed as an elongated hole extending slightly circumferentially from the position that extends circumferentially from the circumferential center of the first valve hole 421 toward the other circumferential direction away from the third angle θ3, it can also be a circular hole.

[0045] The valve holes 421, 422, and 423 from the first to the third do not overlap with any of the first and second weak-fire passage holes 4111 and 4112 and the first and second strong-fire passage holes 4121 and 4122. If the upper and lower burners 108 and 109 are extinguished... Figure 11 The closed state shown in (a) is oriented towards the circumferential direction. Figure 11 Rotating the valve plate 42 clockwise, the first valve hole 421 overlaps with the second low-flame passage hole 4112, switching to a low-flame operation only for the bottom burner 109. Figure 11 The state shown in (b) is as follows. Next, the first valve port 421 overlaps with the second weak flame passage port 4112, and the second valve port 422 overlaps with the second strong flame passage port 4122, thereby switching to a state where only the lower burner 109 burns with a strong flame. Figure 11The state shown in (c) is as follows. Next, the first valve port 421 overlaps with the first and second weak flame passage ports 4111 and 4112, and the second valve port 422 overlaps with the second strong flame passage port 4122, thereby switching to: the lower burner 109 burning with a strong flame, and the upper burner 108 burning with a weak flame. Figure 11 The state is shown in (d). Next, the first valve hole 421 overlaps with the first and second weak flame passage holes 4111 and 4112, and the second valve hole 422 moves away from the second strong flame passage hole 4122 and overlaps with the first strong flame passage hole 4121, thereby switching to: the lower burner 109 burns with a weak flame, and the upper burner 108 burns with a strong flame. Figure 11 The state is shown in (e). Next, the first valve port 421 overlaps with the first and second weak flame passage ports 4111 and 4112, and the second valve port 422 overlaps with the first strong flame passage port 4121. Furthermore, the third valve port 423 overlaps with the second strong flame passage port 4122, thereby switching to: the upper and lower burners 108 and 109 burn at a strong flame. Figure 11 The state is shown in (f). Next, the first valve hole 421 overlaps with the first and second weak flame passage holes 4111 and 4112, and the second valve hole 422 and the third valve hole 423 separate from the first strong flame passage hole 4121 and the second strong flame passage hole 4122, respectively, thereby switching to: the upper and lower burners 108 and 109 burn with weak flame. Figure 11 The state shown in (g) is as follows. Next, the first valve port 421 exits from the second weak flame passage port 4112 and overlaps only with the first weak flame passage port 4111, and the third valve port 423 overlaps with the first strong flame passage port 4121, thus being switched to: only the top burner 108 burns with a strong flame. Figure 11 The state shown in (h) is as follows. Next, the first valve port 421 overlaps only with the first weak flame passage port 4111, and the third valve port 423 moves away from the first strong flame passage port 4121, thus being switched to: only the top burner 108 burns with a weak flame. Figure 11 The state shown in (i). Next, the first valve port 421 exits from the first weak flame passage port 4111, thus being switched to: Figure 11 The closed state is shown by (j).

[0046] According to the flame regulating valve 4 of this embodiment, the flame intensity of each burner 108 and 109 in the upper and lower flames can be switched to three modes: flameout, weak flame, and strong flame, respectively. This allows for switching the combination of flame intensity of the two burners 108 and 109 in the upper and lower flames to a maximum of 3×3, or 9 modes. Accordingly, the range of cooking methods can be expanded.

[0047] Additionally, when the crank pin 812 rotates to the position where the push rod 6 is pushed to the end of its stroke in the X-axis direction by means of the cam body 82, Figure 11 When the position shown in (b) is such that valve plate 42 is at: Figure 11 The closed state shown in (a) is the same as Figure 11 The closed state shown in (j) is the middle closed state. Therefore, even if an abnormal situation such as the motor 6 stopping occurs when the valve body 32 of the electromagnetic safety valve 3 is pushed to the open position, the gas will not be supplied to the upper and lower burners 108 and 109, so that the original gas will not be released.

[0048] Additionally, when the grill is turned off, place valve plate 42 in the following position: Figure 11 The closed state shown in (a) is the same as Figure 11 The closed state shown in (j) is a closed state that is close to the state before the engine shutdown, for example, if the state before the engine shutdown is Figure 11 The state of (c) is then placed in Figure 11 The valve plate 42 remains in the closed state (a) until the next grill ignition, remaining in standby mode. Figure 11 In the standby state shown in (a), when the grill is ignited again, the valve plate 42 is moved from... Figure 11 The closed state shown in (a) transitions to the intermediate closed state described above, causing motor 7 to move towards... Figure 11 Rotate counterclockwise in the middle, when valve plate 42 is in Figure 11 In the standby state shown in (j), during the next grill ignition, the valve plate 42 is moved from... Figure 11 The closed state shown in (j) transitions to the intermediate closed state described above, causing motor 7 to move towards... Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure 11 Figure The cam body 82 rotates clockwise. As described above, since the cam body 82 is provided with a cam portion 824 and a second cam portion 824' symmetrical to the cam portion 824, even if the motor 7 rotates in either the counterclockwise or clockwise direction, the cam body 82 will move in the X-axis direction to force the electromagnetic safety valve 3 to open.

[0049] While embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited thereto. For example, in the above embodiments, although the first burner supplied with gas via the first weak flame passage 4111 and the first strong flame passage 4121 is designated as the upper flame burner 108, and the second burner supplied with gas via the second weak flame passage 4112 and the second strong flame passage 4122 is designated as the lower flame burner 109, it is also possible to designate the first burner as the lower flame burner 109 and the second burner as the upper flame burner 108. Furthermore, in the above embodiments, although the first circumference S1 of the first weak flame passage 4111 and the second weak flame passage 4112 is configured with a smaller diameter, and the second circumference S2 of the first strong flame passage 4121 and the second strong flame passage 4122 is configured with a larger diameter, it is also possible to design the first circumference S1 with a larger diameter and the second circumference S2 with a smaller diameter. Furthermore, although the double-sided barbecue grill 100 of the above embodiment is equipped with a supplementary burner 116, the present invention can also be applied to the flame regulating valve of a double-sided barbecue grill that does not have a supplementary burner.

Claims

1. A flame control valve for a double-sided barbecue grill. The flame control valve for the double-sided barbecue grill includes an upper burner and a lower burner, as well as a fixed plate and a circular valve plate that is rotated by a motor when in contact with one side of the fixed plate. The circular area of ​​the fixed plate that contacts the valve plate is divided into two semicircular areas, the first and the second. When one of the upper and lower burners is designated as the first burner and the other as the second burner, strong-fire and weak-fire passage holes are formed in the first and second semicircular areas, respectively. These passage holes, which overlap with the valve holes formed on the valve plate and are thus open, are switched by rotating the valve plate, thereby switching the flame intensity of the first and second burners. Its features are, The first semicircular region of the fixed plate has: a first weak-flame passage hole, located on a radial line extending circumferentially from the boundary line between the first and second semicircular regions and away from a predetermined first angle, and connected to the first burner; and a first strong-flame passage hole, radially offset from the first weak-flame passage hole, and connected to the first burner. A second weak-flame passage is formed in the second semicircular region of the fixed plate, located on a radial line extending circumferentially away from the first angle from the boundary line between the first and second semicircular regions, and connected to the second burner; and a second strong-flame passage is radially offset from the second weak-flame passage and connected to the second burner. The first and second weak-fire passage holes are located on the first circumference, concentric with the rotation center of the valve plate. The first and second high-power fire passage holes are located on the second circumference, which is concentric with the rotation center of the valve plate and has a diameter different from that of the first circumference. On the valve plate, three valve holes are formed as valve orifices: a first arc-shaped valve hole, a second arc-shaped valve hole, and a third arc-shaped valve hole. The first valve hole is located on a circumference concentric with and of the same diameter as a first circumference, with a central angle greater than twice the first angle (a predetermined second angle). The second valve hole is located on a circumference concentric with and of the same diameter as a second circumference, and extends circumferentially from the circumferential center of the first valve hole towards another circumferential direction at a predetermined third angle (greater than the first angle and less than half the second angle), with a central angle greater than or equal to the first angle and less than the third angle (a predetermined fourth angle). The third valve hole is located on a circumference concentric with and of the same diameter as the second circumference, at or near a location where the circumferential center of the first valve hole extends circumferentially towards another circumferential direction away from the third angle. The first to third valve holes do not overlap with any of the first and second weak flame passage holes or the first and second strong flame passage holes. Starting from the closed state where the first and second burners are extinguished, the valve plate can be rotated circumferentially, thereby sequentially switching to the following 9 states: The first valve hole overlaps with the second weak flame passage hole, so only the second burner burns in a weak flame state; The first valve hole overlaps with the second weak flame passage hole, and the second valve hole overlaps with the second strong flame passage hole, so only the second burner is in a state of strong flame combustion. The first valve hole overlaps with the first and second weak flame passage holes, and the second valve hole overlaps with the second strong flame passage hole, so that the second burner burns with strong flame and the first burner burns with weak flame. The first valve hole overlaps with the first and second weak flame passage holes, and the second valve hole separates from the second strong flame passage hole and overlaps with the first strong flame passage hole, so that the second burner burns with a weak flame and the first burner burns with a strong flame. The first valve hole overlaps with the first and second weak flame passage holes, and the second valve hole overlaps with the first strong flame passage hole. In addition, the third valve hole overlaps with the second strong flame passage hole, so that the first and second burners are in a strong flame combustion state. The first valve hole overlaps with the first and second weak flame passage holes, and the second valve hole and the third valve hole separate from the first strong flame passage hole and the second strong flame passage hole, respectively, so that the first and second burners are in a weak flame combustion state. The first valve hole leaves the second weak flame passage hole and only overlaps with the first weak flame passage hole, and the third valve hole overlaps with the first strong flame passage hole, so that only the first burner is in a state of strong flame combustion. The first valve port overlaps only with the first weak flame passage port, and the third valve port separates from the first strong flame passage port, thus only the first burner burns in a weak flame state; and The closed state.

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