JP2016214302A - grill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve combustion stability of a burner in a grill including the burner in an upper part in a heating chamber and configured to discharge combustion gas emitted from the burner to the outside of a stove body from an exhaust cylinder in a rear part of the heating chamber.SOLUTION: The grill includes: a heating chamber 20 accommodating a heating object; burners 21, 22 which is arranged in an upper part of the heating chamber 20 and heats the heating object; and an exhaust cylinder 23 which extends from a rear part of the heating chamber 20 toward the outside of equipment and leads out combustion gas emitted from the burners 21, 22 into the heating chamber 20 to the outside of the equipment. In an upper side of an exhaust cylinder inlet 230 connecting the heating chamber 20 and the exhaust cylinder 23, a shield plate 28 covering a part of the exhaust cylinder inlet 230 is suspended. A release port 280 capable of leading out the combustion gas to the exhaust cylinder 23 side from the inside of the heating chamber 20 is arranged near an upper edge of the shield plate 28.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a grill configured to discharge combustion gas released from a burner to the outside of an appliance from an exhaust pipe provided at a rear portion of a heating cabinet.

  Conventionally, a combustion gas released from the burner in consideration of thermal efficiency in a grill provided with an exhaust pipe from the rear part of the heating chamber to the outside of the stove body while being provided with a burner in the upper part of the heating chamber Is known in which a shielding plate is suspended at the upper portion of the exhaust pipe inlet connecting the heating chamber and the exhaust pipe to prevent it from flowing out to the exhaust pipe through the upper wall of the heating chamber (for example, Patent Documents 1 to 3).

JP 2012-13326 A JP 2012-42171 A JP 2012-254242 A

  In the above-described conventional grill, when the heating chamber and the exhaust pipe are sufficiently warmed, the combustion gas released from the burner into the heating chamber causes the lower end side of the shielding plate to be moved by the draft force of the combustion gas flowing in the exhaust pipe. Detoured and led into the exhaust stack. However, when the heated food or the exhaust pipe is cold, such as when cooking frozen foods or when cooking is started in the cold season, the combustion gas led into the exhaust pipe is cooled and the draft force is small. Thus, the combustion gas released from the burner may stay around the flame hole without passing over the shielding plate. As a result, the supply amount of secondary air around the flame hole is insufficient, and there is a risk of causing abnormal combustion such as misfire or incomplete combustion.

  In particular, in a double-sided grill provided with a burner (upper burner and lower burner) at the upper and lower portions in the heating chamber, when the shielding plate is provided, a dish-shaped grill formed of a metal plate When cooking using a plate, the gap connecting the space above the grill plate and the exhaust stack becomes narrow, so that the combustion gas released from the upper fire burner is difficult to be led out into the exhaust stack. Therefore, the combustion gas tends to stay around the flame holes of the upper flame burner, which may cause abnormal combustion.

  The present invention has been made in view of the above problems, and its object is to provide a burner at the upper part in the heating chamber, and to discharge the combustion gas released from the burner to the outside of the stove body from the exhaust pipe at the rear of the heating chamber. In the grill constructed as described above, the combustion stability of the burner is improved.

  The present invention includes a heating chamber that accommodates an object to be heated, an upper portion in the heating chamber, a burner that heats the object to be heated, and extends from the rear of the heating chamber toward the outside of the appliance. A grille provided with an exhaust pipe for deriving combustion gas released into the heating chamber to the outside of the appliance, and covering a part of the exhaust pipe inlet above the exhaust pipe inlet connecting the heating chamber and the exhaust pipe A plate is vertically provided, and an escape port is provided in the vicinity of the upper edge of the shielding plate so that the combustion gas can be led out from the inside of the heating chamber to the exhaust tube side.

  In this case, even when the temperature of the heating chamber or the exhaust pipe is low and the draft force of the combustion gas flowing through the exhaust pipe is small, the combustion gas released from the burner does not stay around the flame hole, Since it is led out into the exhaust pipe through the escape port provided in the vicinity of the upper edge of the shielding plate, the secondary air for combustion is stably supplied to the vicinity of the flame hole of the burner. Therefore, abnormal combustion such as misfire or incomplete combustion is unlikely to occur in the burner.

  Further, in the grill, the escape port is a through-hole formed in the vicinity of the upper edge portion of the shielding plate, or a gap provided between the upper edge portion of the shielding plate and the heating chamber upper wall. Then, even if the temperature of the heating chamber or the exhaust pipe is low and the draft force of the combustion gas flowing in the exhaust pipe is small, the combustion gas released from the burner does not stay around the flame hole, Since it is led out into the exhaust pipe in the vicinity of the upper edge of the shielding plate or through the escape port provided between the upper edge of the heat shielding plate and the upper wall of the heating chamber, Secondary air for combustion is stably supplied around the flame hole. Therefore, abnormal combustion hardly occurs in the burner.

  Further, in the grill, if the escape port is provided at least at the rear position of the burner, the combustion gas released from the burner into the heating chamber passes through the escape port at the rear of the burner and enters the exhaust pipe. Since it is led out smoothly, the secondary air is more reliably supplied to the periphery of the burner hole. Therefore, abnormal combustion is less likely to occur in the burner.

  Further, in the grill, if a plurality of the relief openings are arranged in parallel in the left-right direction, even if the flame generated by the ignition of the object to be heated or the combustion flame of the burner is Even if it expands to the rear along the upper wall, it contacts the non-opening between the escape ports and does not easily extend to the exhaust tube side.

  In the grill, the object to be heated is placed in the heating chamber while being placed on the grill plate, and the grill plate has a rear edge portion above the lower edge portion of the exhaust pipe inlet and a shield plate. It is preferable to be provided so as to be positioned below the lower edge portion. In this case, the gap between the lower edge of the exhaust pipe inlet and the lower edge of the shielding plate is vertically separated with the rear edge of the grill plate interposed therebetween, and discharged from the burner to the space above the grill plate. The combustion gas does not stay around the flame hole, and is smoothly led out into the exhaust pipe through the gap above the rear edge of the grill plate and the escape port of the shielding plate. On the other hand, the combustion gas flowing into the space below the grill plate is smoothly led out into the exhaust pipe through the gap below the rear edge of the grill plate. As a result, the secondary air is more reliably supplied to the periphery of the flame hole of the burner, so that abnormal combustion is less likely to occur in the burner. In addition, since the combustion gas released from the burner to the upper and lower spaces of the grill plate is smoothly led out into the exhaust pipe, the heated object placed on the grill plate is stably heated from above and below. Also, uneven baking is unlikely to occur.

  As described above, according to the present invention, since the secondary air for combustion is stably supplied around the flame hole of the burner even under conditions where the temperature of the heating chamber or the exhaust pipe is low, Abnormal combustion such as incomplete combustion hardly occurs and combustion stability is improved.

FIG. 1 is a side view schematic longitudinal sectional view of a stove provided with a grill according to an embodiment of the present invention. FIG. 2 is a schematic vertical sectional view in front view of the grill according to the embodiment of the present invention. FIG. 3 is a schematic vertical sectional view in side view showing the periphery of the exhaust pipe inlet of the grill according to the embodiment of the present invention. FIG. 4 is a schematic perspective view seen from below showing the periphery of the exhaust pipe inlet of the grill according to the embodiment of the present invention. FIG. 5 is a schematic perspective view as seen from the lower part around the exhaust pipe inlet showing a modified example (1) of the grill according to the embodiment of the present invention. FIG. 6 is a schematic vertical sectional view in side view around the exhaust pipe inlet showing a modification (2) of the grill according to the embodiment of the present invention. FIG. 7 is a schematic perspective view of the exhaust pipe inlet and its surroundings showing a modified example (3) of the grill according to the embodiment of the present invention when viewed from below.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  As shown in FIG. 1, a grill 2 according to an embodiment of the present invention is integrated with a stove body 10 of a gas stove 1 having a single or plural stove burners 12 on the top surface of a top plate 11 such as a table stove or a built-in stove. Is a grill incorporated in the heating chamber 20 for storing an object to be heated such as food, an upper fire burner 21 and a lower fire burner 22 for heating the object to be heated in the heating chamber 20, and oil smoke generated from the object to be heated. And an odor component, and an exhaust cylinder 23 for guiding the combustion gas released from the upper fire burner 21 and the lower fire burner 22 to the exhaust port 14 provided in the top plate 11.

  Although not shown, near the flame holes of the upper flame burner 21 and the lower flame burner 22, there are spark plugs that spark discharge around the flame holes and flame detection sensors that detect the presence or absence of gas combustion flames outside the flame holes. Is provided. In addition, a combustion control circuit for the upper fire burner 21 and the lower fire burner 22 is incorporated in the stove main body 10, and the ignition instructions for the upper fire burner 21 and the lower fire burner 22 are instructed. First, when the combustion flame is not detected by the flame detection sensor, the control structure for forcibly shutting off the gas supply to the upper fire burner 21 and the lower fire burner 22 is provided.

  The heating cabinet 20 is formed in the substantially rectangular box shape which has the opening part 200 used as the inlet / outlet of a to-be-heated object in the front surface 13 of the stove main body 10, and is extended toward the inside back from the said front surface 13. FIG. . In this specification, the depth direction when the heating chamber 20 is viewed from the front surface 13 side of the stove body 10 is referred to as the front-rear direction, the width direction is referred to as the left-right direction, and the height direction is referred to as the up-down direction.

  The opening 200 is closed by the grill door 24 from the front of the stove body 10. The grill door 24 is connected and supported by a guide rail (not shown) provided inside the stove main body 10 so as to be slidable back and forth. A support frame 25 for supporting a dish-shaped grill plate 31 formed of a metal plate, a grill net (not shown), and a juice tray 32 is provided on the rear surface of the grill door 24.

  As shown in FIGS. 1 and 2, the support frame 25 is horizontally mounted on a substantially rectangular annular frame main body 251 whose front and rear sides are bent upward, and a lower portion of the front and rear sides of the frame main body 251. A substantially flat plate-like lower frame 252, a grill plate 31 and a grill (in this embodiment, the grill plate 31) are placed on the upper edge of the frame body 251, and a juice receiving tray 32 is placed on the upper surface of the lower frame 252. Is placed.

  On the upper wall 201 of the heating chamber 20, the gas is discharged into the space above the grill plate 31 in the heating chamber 20 and burned, and the combustion gas heats the object to be heated on the grill plate 31 from above. A burner 21 is provided. In addition, a lower fire burner 22 that discharges gas into the space below the grill plate 31 in the heating chamber 20 and burns it on the side wall 202 of the heating chamber 20 and heats the grill plate 31 from the lower side by the combustion gas. Is provided.

  The exhaust tube 23 extends upward from the rear surface of the rear wall 203 of the heating chamber 20, and the internal space thereof is connected to the internal space of the heating chamber 20 through the exhaust tube inlet 230 at the front end. On the other hand, the upper exhaust tube outlet 231 faces the exhaust port 14 of the top plate 11 from below. Therefore, during cooking, the combustion gas discharged from the upper fire burner 21 and the lower fire burner 22 into the heating chamber 20 and the oil smoke and odor components generated from the heated object heated by the combustion gas are exhausted. The gas is guided from the inlet 230 to the exhaust cylinder outlet 231 through the exhaust cylinder 23 and discharged from the exhaust port 14 to the outside of the stove body 10.

  As shown in FIG. 3, in a state where the grill plate 31 is normally positioned and supported with respect to the frame body 251, the lower edge portion 23 </ b> A of the exhaust tube inlet 230 is positioned below the rear edge portion 31 </ b> A of the grill plate 31. A predetermined gap (hereinafter referred to as “lower exhaust lead-out portion”) S1 is defined between the rear edge portion 31A of the grill plate 31 and the lower edge portion 23A of the exhaust pipe inlet 230. Therefore, the combustion gas released from the lower fire burner 22 into the space below the grill plate 31 is led into the exhaust cylinder 23 through the lower exhaust lead-out portion S1. Part of the combustion gas released from the lower fire burner 22 into the space below the grill plate 31 also enters the space above the grill plate 31 from the outside of the side edge portion 31B of the grill plate 31.

  The bottom wall 232 of the exhaust tube 23 extends rearward and upward from the lower edge 23A of the exhaust tube inlet 230, and the combustion gas that has passed through the lower exhaust outlet S1 is exhausted along the upper surface of the bottom wall 232. Guided upward of the cylinder 23. In addition, an overheat detection sensor 26 that detects overheating in the heating chamber 20 is provided at an intermediate portion of the bottom wall 232. Note that the above-described combustion control circuit (not shown) allows the temperature detected by the superheat temperature sensor 26 to reach a preset upper limit temperature when at least one of the upper fire burner 21 and the lower fire burner 22 is ignited. If it reaches, it has the control structure which forcibly interrupts the supply of gas to the upper fire burner 21 and the lower fire burner 22.

  In the middle part of the exhaust cylinder 23, flames generated in the heating chamber 20 such as ignition of the heated object on the grill plate 31 and oil collected in the juice receiving tray 32 are discharged to the outside of the stove body 10 through the exhaust cylinder 23. A substantially cylindrical frame trap 27 is horizontally provided to prevent the occurrence of the trap. The frame trap 27 is fixed in a state where both ends are supported by both side walls of the exhaust tube 23, and the inner space portion thereof is connected to the internal space of the stove body 10.

  A shielding plate 28 that covers a part of the upper region of the exhaust pipe inlet 230 is suspended from the upper edge portion 23 </ b> B of the exhaust pipe inlet 230 in the upper wall 201 of the heating chamber 20. The shielding plate 28 extends from the upper wall 201 to a substantially central position between the upper and lower sides of the exhaust pipe inlet 230, and in a state where the grill plate 31 is normally positioned and supported with respect to the frame body 251, A predetermined gap (hereinafter referred to as “upper exhaust lead portion”) S2 is defined between the rear edge portion 31A and the lower edge portion 28A of the shielding plate 28. Therefore, during cooking, the combustion gas released from the upper burner 21 into the heating chamber 20 is mainly from the upper exhaust outlet S2 into the exhaust cylinder 23 due to the draft force of the combustion gas flowing through the exhaust cylinder 23. Derived.

  In addition, since the lower exhaust lead-out part S1 and the upper exhaust lead-out part S2 are arranged in parallel above and below the rear edge part 31A of the grill plate 31, the combustion gas discharged from the upper fire burner 21 into the heating chamber 20 Is attracted to the lower end side of the lower edge portion 28A of the shielding plate 28 by the draft force of the combustion gas derived from the space below the grill plate 31 into the exhaust cylinder 23 through the lower exhaust deriving portion S1, and the upper exhaust deriving portion It is led out into the exhaust pipe 23 from S2.

  The vertical width of the upper exhaust deriving portion S2 is such that the combustion gas discharged from the upper fire burner 21 to the upper side of the grill plate 31 and the oil smoke and odor components generated from the heated object are smoothly led into the exhaust cylinder 23. The upper and lower widths of the lower exhaust outlet S1 are set to be larger.

  As shown in FIG. 4, the shielding plate 28 includes an upper end flange 281 that protrudes forward along the upper edge portion 28B, and a side end flange 282 that protrudes forward from the upper position of the left and right side ends of the lower edge portion 28A. The upper end flange 281 is fixed in contact with the center of the upper wall 201 of the heating chamber 20, and the side end flange 282 is a stepped plane formed on both sides of the upper wall 201 of the heating chamber 20. It is fixed in contact with the portion 204.

  In the vicinity of the upper edge portion 28B of the shielding plate 28, that is, at a position closer to the upper edge than the center between the upper and lower sides, a plurality of relief openings 280 made of horizontally long through holes are provided. The escape ports 280 are arranged in parallel at a predetermined interval in the left-right direction at the rear position of the upper fire burner 21. Therefore, even when the frozen food is cooked or when cooking is started in the cold season, the temperature of the heating chamber 20 and the exhaust cylinder 23 is low, and the draft force of the combustion gas flowing in the exhaust cylinder 23 is small. A part of the combustion gas released from the upper fire burner 21 into the heating chamber 20 is led into the exhaust pipe 23 through the escape port 280.

  The vertical width of the escape port 280 is set smaller than the vertical width of the upper exhaust deriving portion S2 (see FIG. 3), and the ventilation resistance is larger than that of the upper exhaust deriving portion S2. Therefore, after the heating cooking is started, if the heating chamber 20 and the exhaust cylinder 23 are sufficiently warmed and the draft force of the combustion gas flowing in the exhaust cylinder 23 comes to operate normally, the inside of the heating chamber 20 from the upper fire burner 21 is obtained. The combustion gas released to is mainly attracted to the lower edge portion 28A side of the shielding plate 28 and led out into the exhaust cylinder 23 through the upper exhaust lead-out portion S2.

  In the present embodiment, the vertical width of the exhaust pipe inlet 230 is set to about 90 mm, and the vertical width of the shielding plate 28 is set to about 40 mm. The escape port 280 has a vertical width of about 5 mm and a horizontal width of about 22 mm, and is provided at a position about 7.5 mm below the upper end of the shielding plate 28. Further, the escape ports 280 are arranged side by side at an interval of about 3 mm.

  As described above, according to the grill 1, even when the temperature of the heating chamber 20 and the exhaust cylinder 23 is low and the draft force of the combustion gas flowing through the exhaust cylinder 23 is small, it is released from the upper fire burner 21. The combustion gas does not stay around the flame hole and is led into the exhaust pipe 23 through the escape port 280 provided in the upper edge portion 28B of the shielding plate 28. Accordingly, the combustion of the upper fire burner 21 Secondary air for combustion is stably supplied around the flame hole. Accordingly, abnormal combustion such as misfire or incomplete combustion hardly occurs in the upper fire burner 21, and combustion stability is improved.

  Moreover, in this case, an escape port 280 is provided at a position behind the upper fire burner 21 in the shielding plate 28, and the combustion gas released from the upper fire burner 21 into the heating chamber 20 passes through the escape port 280 as it is. Therefore, the secondary air is more reliably supplied to the vicinity of the flame hole of the upper fire burner 21 because the air is smoothly led out into the exhaust pipe 23. Therefore, abnormal combustion is less likely to occur in the upper fire burner 21 and combustion stability is further improved.

  Further, in this case, the gap between the lower edge portion 23A of the exhaust pipe inlet 230 and the lower edge portion 28A of the shielding plate 28 is divided into upper and lower portions with the rear edge portion 31A of the grill plate 31 sandwiched therebetween. The combustion gas released from the burner 21 to the space above the grill plate 31 does not stay around the flame hole, and the gap above the rear edge 31A of the grill plate 31 (upper exhaust outlet S2) and the shielding plate 28 The air is smoothly guided into the exhaust tube 23 through the escape port 280. On the other hand, the combustion gas released from the lower fire burner 22 into the space below the grill plate 31 passes smoothly through the gap below the rear edge 31A of the grill plate 31 (lower exhaust lead-out portion S1) into the exhaust pipe 23. Derived. That is, even when cooking is performed using the grill plate 31, the combustion gas released from the upper fire burner 21 is stably led out to the exhaust pipe 23. Thereby, since secondary air is more reliably supplied to the flame hole periphery of the upper-fire burner 21, abnormal combustion is less likely to occur in the upper-fire burner 21. Therefore, the combustion stability is further improved. Further, the combustion gas released from the upper fire burner 21 into the space above the grill plate 31 and the combustion gas released from the lower fire burner 22 into the space below the grill plate 31 both smoothly enter the exhaust pipe 23. Since the object to be heated placed on the grill plate 31 is stably heated from above and below, uneven baking is less likely to occur.

  By the way, if the shielding plate 28 is not provided at the upper edge portion 23B of the exhaust pipe inlet 230, the flame generated by the ignition of the heated object or the combustion flame of the gas released from the upper fire burner 21 When enlarging rearward through the wall 201, there is a risk that flames may be led out of the stove body 10 through the exhaust tube 23. However, in this case, a plurality of relief openings 280 are arranged in parallel in the left-right direction along the upper edge portion 28B of the shielding plate 28 with a predetermined interval. Even if it expands rearward along the wall 201, it is in contact with the rib portion (non-opening portion) 283 between the escape ports 280 and hardly extends to the exhaust tube 23 side. Therefore, safety is also improved.

  In the above embodiment, the description has been given of the case where the upper edge portion 28B of the shielding plate 28 is provided with a plurality of escape ports 280 made of horizontally long through holes with a predetermined gap in the left-right direction. As shown in FIG. 6, a plurality of relief openings 480 made of horizontally long notches may be provided on the end face of the upper edge portion 28 </ b> B of the shielding plate 28 with a predetermined gap in the left-right direction. In the upper wall 201 of the heating chamber 20, a plurality of relief ports 530 made of concave grooves extending in the front-rear direction along the upper wall 201 are provided at a position above the shielding plate 28 with a predetermined gap in the left-right direction. Also good. Also in these things, there exists the same effect as the grill 2 concerning the above-mentioned embodiment.

  In each of the above embodiments, a description has been given of a case where a plurality of escape openings (280, 480, 530) are provided in the vicinity of the upper edge of the shielding plate 28. However, the combustion gas released from the upper fire burner 21 is discharged from the exhaust pipe. The shield plate 28 can be led out to the side of the exhaust pipe 23 and the flame generated by the ignition of the object to be heated and the combustion flame of the gas released from the upper fire burner 21 are difficult to be led out to the side of the exhaust cylinder 23. Only one wide relief port (280, 480, 530) may be provided in the vicinity of the upper edge, or the upper edge of the upper wall 201 of the heating cabinet 20 and the upper edge of the shielding plate 28 as shown in FIG. A gap 60 having a predetermined width may be provided as a relief port between the terminal 28B and the terminal 28B.

2 Grill 20 Heating chamber 21 Upper fire burner 22 Lower fire burner 23 Exhaust tube 230 Exhaust tube inlet 23B Upper edge portion 28 of exhaust tube inlet 280 Relief port 28B Upper edge portion of exhaust opening

Claims (5)

A heating chamber that accommodates the object to be heated, a burner that is disposed in the upper portion of the heating chamber, heats the object to be heated, and extends from the rear of the heating chamber toward the outside of the appliance. A grill provided with an exhaust pipe for discharging the released combustion gas to the outside of the appliance,
A shielding plate that covers a part of the exhaust pipe inlet is suspended above the exhaust pipe inlet that connects the heating chamber and the exhaust pipe,
A grill provided with an escape port in the vicinity of the upper edge of the shielding plate, through which the combustion gas can be led out from the inside of the heating chamber to the exhaust tube side. The grill according to claim 1,
The said escape port is a grill which consists of a through-hole opened in the vicinity of the upper edge part of a shielding board, or the clearance gap provided between the upper edge part of a shielding board, and a heating chamber upper wall. The grill according to claim 1 or 2,
The escape opening is a grill provided at least at a rear position of the burner. The grill according to any one of claims 1 to 3,
A plurality of the relief openings are arranged in parallel in the left-right direction at a predetermined interval. The grill according to any one of claims 1 to 4,
The object to be heated is accommodated in the heating chamber in a state of being placed on the grill plate,
The grill plate is a grill provided such that the rear edge portion is located above the lower edge portion of the exhaust pipe inlet and below the lower edge portion of the shielding plate.

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