JP2001061673A - Gas cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an increase in the temperature of the surface of a hotplate. SOLUTION: In this cooker, when combustion exhaust air produced in an upper burner 5 and a lower burner 6 during cooking is exhausted upward from an exhaust air chamber 50, hot air produced in a hot air exhaust duct 39 is pulled to the hot air exhaust duct 39 by the draft power of the combustion exhaust air and exhausted externally of a container together with the combustion exhaust air. On that occasion, air outside a grill 2 is sucked from an upper air supply opening 31a provided on the side of a heat shield plate 32, cooling the heat shield plate 32, the heat shield plate 32 prevents heat inside a grill case 2 from being transmitted to a top plate 73, and reducing an increase in the surface temperature of the top plate 73.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas cooker for cooking foods such as fish by placing them on a grill.

[Prior art]

2. Description of the Related Art Conventionally, there has been known a table stove provided with a rear exhaust grill which heats an object to be cooked such as fish by a burner provided in a grill storage and discharges generated combustion exhaust from a rear side of a body. . FIG. 11 is a cross-sectional view of a conventional single-sided grill grill viewed from the side. This grill is for cooking object F
Oven 102 for heating and cooking, an exhaust chamber 150 provided at the back of grill oven 102 and having an exhaust port 150a opened upward to guide combustion exhaust in grill oven 102 to the outside, and upper left and right side surfaces of grill oven 102 An all-primary burner 105 for burning fuel gas, and a shield provided between a top plate 73 of the body and the grill storage 102 with a predetermined gap from a grill top plate 130 serving as a ceiling of the grill storage 102. A heating plate 132 is provided. The heat shield plate 132 prevents heat generated in the grill storage 102 from being directly transmitted to the top plate 73.

[0003]

However, in such a gas cooker, the grill top plate 130 is heated by the heat generated from the burner 105, and hot air is generated between the heat shield plate 132 and the grill top plate 130. . This hot air was trapped without being discharged to the outside of the container as shown by hatching in the figure, and heated the top plate 73 to a considerably high temperature. For this reason, there is a possibility that the hand touches the top plate 73 and burns. Conventionally, in order to eliminate this problem, a heat insulating plate is assembled with a heat insulating material to cope with the problem, but it is insufficient, and it has been difficult to maintain the temperature at a safe level to prevent burns. Also, JP-A-8-2006
In 85, the space formed between the grill top plate and the top plate communicates with the exhaust chamber, and the front of the space communicates with the outside to take in air from the front of the body into the space and exhaust air. There is known a gas cooker in which an air passage leading to a chamber is formed, a motor fan is provided downstream of the air passage, and a flow of air is created by the suction force of the motor fan to reduce a rise in surface temperature of the top plate. But
Since this requires a motor fan, the configuration is complicated and expensive. Further, in a structure that does not use a motor fan, since it depends on the natural drafting force, there is not enough force to suck hot air generated on the front front side of the air passage to the rear exhaust chamber. For this reason, the hot air accumulated in the front-side air passage leaks from the back surface of the top plate (73a in FIG. 11) on the front of the body and heats the front portion of the top plate instead, which is not good. An object of the present invention is to solve the above-described problems and reduce an increase in surface temperature of a top plate.

[0004]

According to a first aspect of the present invention, there is provided a gas cooker, wherein a grill cooker for heating and cooking an object to be cooked by the combustion heat of a burner is provided in parallel with a back of the grill cooker. A gas cooker having an exhaust port opening upward and an exhaust chamber for guiding combustion exhaust gas inside the grill chamber to the outside, wherein a top plate of a vessel housing the grill chamber and the exhaust chamber, and A hot air discharge passage communicating with the exhaust chamber is provided between the grill chamber and the exhaust chamber, an air supply opening for taking in cooling air is opened in the hot air discharge passage, the exhaust chamber is divided by a partition plate, and the grill is divided. An exhaust discharge duct that guides the combustion exhaust gas in the refrigerator to the exhaust port, and a hot air discharge duct that guides the hot air in the hot air discharge passage to the exhaust port are formed independently, and the exhaust heat flowing through the exhaust discharge duct forms the hot air exhaust duct. Heat the partition plate A draft force is generated in the hot air discharge duct, and the cooling air is sucked into the hot air discharge passage from the air supply port by the draft force and discharged from the hot air discharge duct to prevent overheating of the top plate. Make a summary.

According to a second aspect of the present invention, in the gas cooker according to the first aspect, a front surface of the hot air discharge passage is shielded so that the air supply port is connected to the hot air discharge passage. The gist is that it is formed on the left and right sides on the near side.

In the gas cooker according to a third aspect of the present invention, in the gas cooker according to the first or second aspect, the closer the hot air discharge passage is to the hot air discharge duct, the higher the upper surface thereof becomes. The gist is to provide such an inclination.

According to a fourth aspect of the present invention, there is provided the gas cooker according to any one of the first to third aspects, wherein a cross-sectional area of the hot air exhaust duct is reduced by a passage of the hot exhaust duct. The gist is to make it smaller than the cross-sectional area.

[0008] In the gas cooker according to the first aspect of the present invention having the above structure, when the combustion gas generated from the burner passes through the exhaust discharge duct, the air in the adjacent hot air discharge duct is heated, and the air is heated. The hot air expands and becomes lighter and expands to generate an upward draft force and rises, and this flow smoothly discharges the hot air generated in the hot air discharge passage from the hot air discharge duct to the outside of the grill storage. At this time, since the cool air is sucked into the hot air discharge passage from the air supply port, the temperature rise in the hot air discharge passage is reduced, the heat transfer from the hot air discharge passage to the top plate is suppressed, and the surface temperature of the top plate rises. Can be reduced.

According to the gas cooker according to the second aspect of the present invention, the front of the hot air discharge passage is shielded, and the air supply ports are formed on the left and right sides of the hot air discharge passage. The hot air inside does not flow back to the front side. As a result, it is possible to suppress the heat in the grill storage from being transmitted to the front portion of the top plate, and to reduce the rise in the surface temperature of the front portion of the top plate.

Further, according to the gas cooker of the third aspect of the present invention, the hot air discharge passage is inclined in such a manner that the upper surface thereof becomes higher as it is closer to the hot air discharge duct, so that it is generated in the hot air discharge passage. The heated hot air can be smoothly guided to the hot air discharge duct while being directed along the inclined hot air discharge passage upper surface.

Further, according to the gas cooker according to the fourth aspect of the present invention, since the hot air discharge duct is configured to be narrower than the exhaust discharge duct, most of the air in the hot air discharge duct comes into contact with the partition plate and is heated. . As a result, the air in the hot air exhaust duct becomes sufficiently hot, the draft force in the hot air exhaust duct increases, and a large amount of cooling air flows from the air supply port into the hot air exhaust passage to further cool the hot air exhaust passage. In addition, an increase in the surface temperature of the top plate can be reduced.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of a gas cooker of the present invention will be described below.

FIG. 3 is an external view of a table stove with a grill as one embodiment of the present invention. The table stove has two sets of stove burners 7 on the top plate 73.
4a, 74b are provided, and a cooking pot (not shown) is placed on the gorge 75a, 75b provided therearound, and operation buttons 71a, 71b provided on the front surface of the table stove.
By pressing the respective burner burners 74a, 74
b is ignited and the cooking pot is heated. At the center of the body between the stove burners 74a and 74b, there is provided a grill 1 for baking objects to be cooked such as fish.
Press 1c to ignite and cook.

The grill 1 is a double-sided grill, as shown in FIGS. 1 and 2, and has a grill storage 2 for storing and heating the object F to be cooked. An upper burner 5 provided on the left and right side surfaces of the upper stage for heating fuel to be cooked F by burning fuel gas, a grill 3 provided on a middle stage for placing the object to be cooked F, and provided on the left and right side surfaces of the lower grille 2 The lower burners 6, which burn the fuel F by burning the fuel gas, a lower burner cover 40 in the shape of a box that covers most of the lower burners 6, and a front side with the grill 3 provided on the bottom. And a tray 4 that can be slid out of the tray. A fire transfer flame holding burner 18 that is provided outside the left and right exhaust discharge duct side plates 59 and transmits the flame to both burners 5 and 6 is provided at the rear outside of the grill storage 2.

At the front center of the grill 2, there are provided a handle 62 which is fixed integrally with the tray 4 and pulls the tray 4 forward, and an opening / closing door 61 which opens and closes in conjunction with the pulling of the tray 4. The door 61 is provided with a glass viewing window 61a. When the handle 62 is pulled out to the front, the pan 4 fixed to the handle 62 slides on the bottom surface of the grill storage 2 and the grill 3 placed on the pan 4 is simultaneously pulled out.

A grill top plate 30 serving as a ceiling of the grill storage 2
Are formed in a V-shape when viewed from the front, and the center is lowered. A predetermined gap is formed between the grill top plate 30 and the top plate 73 from the grill top plate 30 so that the heat shield plate 32
Is provided. The heat shield plate 32 is inclined such that the higher the position is, the closer to the exhaust chamber 50 described later.

Further, a space formed between the grill top plate 30 and the heat shield plate 32 is formed as a hot air discharge passage 31 to shield the top plate 73 from heat. In order to shield the front of the hot air discharge passage 31, the front part of the heat shield plate 32 is bent so as to be in close contact with the grill top plate 30, and the heat shield plate 32 is supported on the grill top plate 30 as shown in FIG. The heat shield side plate 32a is provided by bending the left and right sides of the heat shield plate 32 downward. However,
In order to take in the air outside the grill storage 2 into the hot air discharge passage 31, a front side surface portion (other than the heat shield side plate 32a) of the heat shield plate 32 is formed as an upper air supply port 31a. Further, the hot air discharge passage 31 is communicated with the exhaust chamber 50 so that air outside the grill storage 2 is taken in from the upper air supply port 31a and guided to the exhaust chamber 50. However, the hot air discharge passage 31 is provided with a heat shield plate 32.
Is not communicated with the outside by the front part, so that the air in the hot air discharge passage 31 does not leak to the front part of the top plate 73.

An exhaust chamber 50 is provided at the back of the grill storage 2 via an exhaust exhaust duct front plate 51, and a top plate 73 is opened above the exhaust chamber 50 to form an exhaust port 76. The exhaust port 76 projects from the opening of the top plate 73 and is formed at a position higher than the conventional exhaust port 150a as shown in FIG. The exhaust chamber 50 is divided into a hot air exhaust duct 39, an exhaust exhaust duct 56, and an air duct 54 by the partition plate 26 and the split plate 53, and a flow path extending in a substantially vertical direction independently to the exhaust port 76 is formed. . On the other hand, the exhaust port 76 is divided into three parts: a hot air exhaust port 38, an exhaust exhaust port 57, and an air exhaust port 58, and an exhaust port cover 77 is mounted above the exhaust port 76. The hot air discharge duct 39 is connected to the hot air discharge passage 31.
Communicate with The depths of the hot air outlet 38, the exhaust outlet 57, and the air outlet 58 are formed at a ratio of about 1: 3: 1, and their widths are equal.

The partition plate 26 is provided vertically between the front hot air exhaust duct 39 and the rear exhaust exhaust duct 56. The left and right sides of the exhaust discharge duct 56 are formed by the exhaust discharge duct side surfaces 59, and the left and right outer sides are provided with installation rooms for the burner flame holding burner 18.

Between the front exhaust discharge duct 56 and the rear air duct 54, the dividing plate 53 is inclined so as to be located at a rearward position toward the upper part, and a portion of the top plate 73 which comes into contact with the rear end of the receiving tray 4. Extending to the upper side, this split plate 53
Into two flow paths.

The depth of the hot air exhaust duct 39 and the air duct 5
4 is the exhaust discharge duct 56 at any height.
Is formed so as to be narrower than the depth. Hot air exhaust duct 3
Above 9, a hot air outlet 38 is opened, on the other hand, an exhaust outlet 57 is opened above an exhaust exhaust duct 56, and an air outlet 58 is opened above an air duct 54. Further, the exhaust discharge duct front plate 51 is formed with an exhaust communication port 24 below the grill 3 to communicate the grill storage 2 and the exhaust discharge duct 56. As a result, the length of the exhaust discharge duct 56 is increased, and the distance of heat exchange between the air in the exhaust discharge duct 56 and the air in the air duct 54 is also increased. In the air duct 54, a plurality of fins 55a are provided, which are perpendicular to the dividing plate 53 and extend vertically. Also,
Inside the exhaust discharge duct 56, a flame shield device 52 formed by using a perforated plate having a plurality of ventilation holes is provided so that the combustion exhaust gas flows so that all the combustion exhaust flowing through the exhaust discharge duct 56 passes through the perforated plate. Install along the direction.

A cooling passage 12 communicating with the air duct 54 is provided below the receiving tray 4, and a medium air inlet 13 is formed. A U-shaped heat shield bottom plate 14 is provided below the middle air inlet 13 on the bottom surface of the cooling passage 12 to prevent the base on which the container is placed from being heated. Between the bottom surface of the grill storage 2 and the handle 62, front air inlets 16 for taking combustion air into the grill storage 2 are formed on the left and right. During the combustion of the lower burner 6, fresh secondary air is sucked from the front air inlet 16.

Upper burners 5 provided on the left and right sides of the grill storage 2
Is an all-primary-air burner that has a combustion surface 5a in which a number of small flame openings penetrate through a flat plate of porous ceramics, and inhales most of the air necessary for combustion as primary air.
The combustion surface 5a is formed along the depth direction of the grill storage 2 and is provided slightly inclined with respect to the vertical plane. The upper side of the object to be cooked F is heated mainly by radiant heat from the upper burner 5 and convection of combustion exhaust indicated by a broken arrow.

On the other hand, the lower burner 6 is a Bunsen-type burner in which air necessary for combustion is supplied by primary air and secondary air, and is provided on the left and right side surfaces outside the grill storage 2. A nozzle row is formed by two nozzle bodies 34 (described later) arranged along the depth direction. More specifically, as shown in FIGS. 4 and 5, the lower burner 6 is formed by press-forming a cylindrical portion 33 and a nozzle body 34 communicating with the cylindrical portion 33 at right angles, and by caulking. An air hole 35 is formed above and below each nozzle body 34.

The cylindrical portion 33 is closed at its tip,
A pipe 36 whose base end is connected to the gas pipe 7a is inserted and fixed by spot welding. Further, on the side surface of the pipe 36, a nozzle hole 37 which is located at the center of the gas passage 11 of each nozzle body 34 in a state of being housed in the cylindrical portion 33 and has a smaller diameter than the gas passage 11 is formed as a nozzle portion. .
Therefore, the gas supplied to the pipe 36 is supplied from the nozzle holes 37 to the respective nozzle bodies 34 by the gas supply pressure, and the primary air is sucked from the air holes 35, and the jetting speed as a fuel gas from the nozzle bodies 34 is increased. Because it is blown out, a flame with a long fire foot can be obtained.

The lower burner 6 has a pipe 36 and an air hole 35 of each nozzle body 34 covered by a lower burner cover 40. As shown in FIG. 2, the lower burner cover 40 is a rectangular parallelepiped box provided on the lower left and right side surfaces of the grill storage 2 and isolated from the grill storage 2 of the lower burner 6. The left and right outer surfaces are open to communicate with the outside of the grill storage 2. On the other hand, through holes 17 are formed in the left and right inner wall surfaces so that the front end (flame port) of the nozzle body 34 faces the inside of the grill storage 2. The through hole 17 is an opening having a gap of 0.6 mm around the entire circumference of the nozzle body 34, and communicates the outside with the inside of the grill storage 2. The nozzle body 34 protruding from the through hole 17 is provided such that the direction in which the combustion gas is jetted is horizontal. Further, a flame port cover 41 is provided above the tip of the nozzle body 34, and covers the flame port to such an extent that the formation of the flame of the nozzle body 34 is not disturbed.

The fire transfer flame holding burner 18 provided between the upper burner 5 and the lower burner 6 is composed of an upper fire transfer burner 18a and a lower fire transfer burner 18b.
a, an upper nozzle 43, which will be described later, is provided at the end of the gas pipe 44 to emit a flame with a long fire foot and to ignite the combustion surface 5a of the upper burner 5, while the lower fire transfer burner 18b is connected to the lower burner 6
It has a function of flame transfer to and flame holding and flame holding of the upper fire transfer burner 18a.

More specifically, the lower fire transfer burner 18b uses a well-known Bunsen burner. As shown in FIG. 1, the lower end of the throat portion to which gas is supplied together with the primary air is provided with a hollow portion 20 extending vertically. A horizontally extending hollow portion 21 forms an L-shape. This vertical hollow portion 20 is
It is located outside the left and right exhaust / exhaust duct side plates 59 outside the rear. At the upper end of the hollow, a flame opening 23 for flame holding is formed so as to open largely in the vicinity of the lower portion of the upper nozzle 43, so that the flame is transferred to the upper nozzle 43. On the other hand, the horizontal hollow portion 21
Are located near the lower part of the tip of each nozzle body 34 of the lower burner 6, respectively. As shown in FIG. 2, the hollow portions 20 and 21 are formed by stacking three plates, and gas is supplied through gaps having a semicircular cross section on the left and right sides, and is opened in the central plate. The gas flow rate is restricted by the small holes, and the gas flow is formed so as to pass through the gap formed by the inner plate and the central plate and to be sent to the continuous fire flame 22 formed at the upper portion. It should be noted that an ignition electrode (not shown) is provided outside the grill housing 2 so as to face the fire transfer opening 22.

On the other hand, the upper fire transfer burner 18a is provided at a position where a flame is ejected from the upper nozzle 43 toward the combustion surface 5a of the upper burner 5. The exhaust discharge duct front plate 51 that separates the upper burner 5 and the upper nozzle 43 is provided with a flame introduction small hole 42 so that the jet flame is introduced into the grill storage 2. The flame introduction hole 42 is formed to have a small diameter (diameter φ5) such that the jet flame can be introduced and the combustion exhaust gas in the grill storage 2 does not flow toward the upper nozzle 43.

The upper nozzle 43 is connected to the nozzle body 3 of the lower burner 6.
4, air holes 46 are formed in the upper and lower portions, and a nozzle hole 48 having a smaller diameter than the gas passage 47 of the gas pipe 44 is provided upstream of the air hole 46 as a nozzle portion, as shown in FIG. Have been. Therefore, the gas supplied to the gas pipe 44 is supplied from the nozzle hole 48 to the upper nozzle 43 by the supply pressure of the gas, and the primary air is sucked from the air hole 46, and the ejection speed as a fuel gas from the upper nozzle 43 is high. Because it is blown out, a flame with a long fire foot can be obtained. An air supply pipe 45 extending from the outside of the grill storage 2 is provided below the flame forming portion of the upper nozzle 43, and
The outside fresh air is taken in as secondary air and the upper nozzle 4
Stabilize the flame of 3.

According to the gas cooker described above, when the operation button 71c is pressed, the on-off valve for opening and closing the gas flow path to the upper burner 5 and the on-off valve for opening and closing the gas flow path to the lower burner 6 are opened. Is done. At this time, in the lower burner 6, gas is supplied from the pipe 36 to each nozzle body 34. In addition, each nozzle body 3
In the gas passage 11 of 4, the injection effect when gas is ejected from the narrow nozzle hole 37 at a high ejection speed using the supply pressure of the gas from the pipe 36 causes fresh air in the lower burner cover 40 from the air hole 35 due to the injection effect. The air is sucked as primary air as shown by the solid line arrow in the figure, and is ejected as a mixed gas.

Further, by this ignition operation, the on-off valve for opening and closing the gas flow path to the fire-extinguishing flame holding burner 18 is also opened at the same time. The upper fire transfer burner 18a supplies the gas from the gas pipe 44 to the upper nozzle 43 by the same operation as the nozzle body 34, and the gas pipe 4 in the gas passage 47 of the upper nozzle 43.
Fresh air outside the grill warehouse 2 is sucked from the air holes 46 as primary air using the supply pressure of the gas from 4 as primary air, and is ejected as a mixed gas. On the other hand, in the lower heat transfer burner 18b,
The gas is supplied to the hollow portions 20 and 21 through the throat portion, and ignites the flame 22 for the transfer of fire by continuous discharge of the ignition electrode. Accordingly, a flame having a long fire foot is formed obliquely upward from the upper nozzle 43 by the flame at the flame holding opening 23 at the upper end of the vertical hollow portion 20 and ignited to the rear of the upper burner 5 through the flame introduction small hole 42. On the other hand, the flame of the transfer flame 22 that travels through the horizontal hollow portion 21 ignites the combustion gas ejected from each nozzle body 34 in order, and generates a flame from the flame opening of each nozzle body 34. Thus, the upper burner 5 and the lower burner 6 ignite from the rear to the front, and bake both upper and lower surfaces of the object to be cooked F.

The grill top plate 30 is heated by the heat generated from the upper burner 5 and the lower burner 6, and generates hot air in the hot air discharge passage 31 above the grill top plate 30. On the other hand, when the combustion gas generated from the upper burner 5 and the lower burner 6 passes through the exhaust discharge duct 56, the adjacent hot air discharge duct 39
Since the air inside is heated to a high temperature and expands and becomes light, an upward draft force is generated, and the hot air exhaust duct 3
9 is smoothly discharged out of the grill storage 2.

At this time, the hot air in the hot air discharge passage 31 is pulled to the hot air discharge duct 39 by the draft force and discharged to the outside of the body. At this time, the pressure in the hot air discharge passage 31 is reduced, and the upper air supply port 31 a
Since the air outside the grill storage 2 is sucked, the air flow is generated in the hot air discharge passage 31, so that the structure becomes hard to trap the hot air, and the heat shield plate 32 can be cooled. By the cooled heat shield plate 32, the heat in the grill storage 2 is prevented from being transmitted to the top plate 73, and a rise in the surface temperature of the top plate 73 is reduced.

In addition, since the depth of the hot air discharge duct 39 is made narrow, most of the air in the hot air discharge duct 39 surely contacts the partition plate 26 and is heated. Further, since the heat shield plate 32 is inclined so as to be at a higher position as it is closer to the hot air discharge duct 39, the hot air generated in the hot air discharge passage 31 is directed along the heat shield plate 32 to the hot air discharge duct 39. Leading smoothly. In addition, since the exhaust port 76 protrudes from the opening of the top plate 73 and is formed at a higher position than in the past to increase the rising distance of the air, the draft force by the air is further strengthened, and the hot air in the hot air discharge passage 31 is heated. Emissions are further promoted. Further, since the heat exchange distance of the hot air discharge duct 39 becomes longer, the heat of the combustion exhaust is effectively used. As a result, the cooling air is supplied to the hot air exhaust duct 3
In FIG. 9, the flow velocity increases to further cool the hot air discharge passage 31 and reduce the rise in the surface temperature of the top plate 73.

On the other hand, the front portion of the heat shield plate 32 prevents the hot air generated in the hot air discharge passage 31 from leaking to the front of the body, and suppresses the heating of the front portion of the top plate 73 which is most easily touched by the user. ing. For these reasons, the upper air supply port 31a is provided on the left and right side surfaces of the heat shield plate 32 instead of the front surface.

Here, the effect of reducing the rise in the surface temperature of the top plate 73 by the hot air discharge passage 31 is shown by the experimental results in Table 1. The conventional example used a double-sided grill (FIG. 10) in which the lower burner 6 was provided on the single-sided grill shown in FIG. T1 to T14 in Table 1 are measurement points of the top plate 73 shown in FIG.
It was 0 ° C.

[Table 1] In this embodiment, T1 to T4 that the user is likely to touch are 10
0 ° C. or lower, and T6, T8, and T10 were lower than the conventional example by 20 ° C. or more. Therefore, from this result, it is understood that the effect of reducing the rise in the surface temperature of the top plate 73 by the hot air discharge passage 31 is very large.

By the way, a conventional lower burner (not shown)
Although the flame was formed at an ejection pressure of about 1 mmH ₂ O, since the lower burner 6 of the present embodiment utilizes the gas supply pressure, the secondary pressure is about 100 to 140 mmH ₂ O (12A13A). In the case of gas), the flame is formed long forward due to the high ejection velocity. Therefore, the lower burner 6
Since it is possible to effectively heat the central portion in the grill storage 2, the object to be cooked F can be uniformly heated in combination with the heating effect by the combustion exhaust gas, and uneven grilling does not occur. As a result, there is no need to increase the gas consumption required for increasing the heating temperature of the central part of the grill storage 2, which is economical. It should be noted that the flame from the flame transfer opening 22 of the hollow portion 21 is also generated upward at the vicinity of the flame opening of each nozzle body 34, and even if the ejection speed of the fuel gas from the nozzle body 34 is high, the flame lifts. Can be prevented,
Heating by the lower burner 6 is performed properly.

Further, the flame of the upper nozzle 43 is held by the flame at the flame holding port at the upper end of the vertical hollow portion 20.
Similarly, lift can be prevented in the upper nozzle 43 having a high gas ejection output. Moreover, the upper nozzle 43 is connected to the flame introducing small hole 4.
2, even if the combustion exhaust gas in the grill storage 2 leaks out of the flame introduction small hole 42, the exhaust gas escapes upward and the upper nozzle 43 does not undergo oxygen-deficient lift. Therefore, even at the time of re-ignition, the upper transfer burner 18a ignites sufficiently and reliably. In addition, since the fire transfer flame holding burner 18 is provided outside the grill storage 2 having a high oxygen concentration, its combustion performance is improved.

When the cooking object F is placed on the grill 3 and the cooking is performed, the fats and oils of the cooking object F, that is, the grilled fat G, scatter or pass between the grills 3 and fall to the lower tray 4. At this time, the flame opening of the nozzle body 34 is
Since it protrudes from zero, there is a risk of clogging with the burnt fat G, but oil clogging is prevented by the flame port cover 41 provided above.

Further, the air holes 35 and the nozzle holes 37 of the lower burner 6 are provided in the lower burner cover 40, and the through holes 17 communicating with the inside of the grill chamber 2 are formed to be small, so that the gas is generated from the food F to be cooked. Since the oil smoke does not easily flow into the lower burner cover 40, the air holes 35 and the nozzle holes 37 are not clogged with the oil smoke. As described above, in order to prevent the clogging of the flame outlet, the air hole 35, and the nozzle hole 37 of the nozzle body 34, the combustion of each nozzle body 34 is favorably performed.

Further, since the air holes 35 are provided outside the grill storage 2, even if the combustion exhaust gas is trapped in the grill storage 2, the primary air having a higher oxygen concentration than the inside of the grill storage 2 is sucked. As a result, a stable flame can be formed while maintaining the combustion performance.

The exhaust communication port 24 at the back of the grill storage 2 is
Therefore, the high-temperature combustion exhaust gas generated by the upper burner 5 and the lower burner 6 during cooking temporarily accumulates in the upper portion of the grill storage 2 as shown by a broken arrow in the drawing. Therefore, the heating of the object to be cooked F placed on the central portion which is less distant from the upper burner 5 and which receives less heat due to the radiant heat is supplemented by the exhaust heat, and the entire object to be cooked F is burned more uniformly.
Moreover, since the ceiling surface of the grill storage 2 is formed in a V-shape, the combustion exhaust gas can be more effectively collected at the center as shown by the dashed arrow in the figure, and can be uniformly heated.

The combustion exhaust gas accumulated in the upper part of the grill storage 2 is
The gas flows into the exhaust discharge duct 56 from the exhaust communication port 24 and is discharged outside from the upper exhaust discharge port 57. The combustion exhaust is
When flowing through the exhaust discharge duct 56 having a long heat exchange distance, the whole of the divided plate 53 is heated from the lower portion to the upper portion, and the fins 55 a and the divided plate 53
Thus, the temperature of the air in the air duct 54 is increased.
Further, since the depth width of the air duct 54 is made narrow and the dividing plate 53 is inclined so as to be located at a rearward position toward the upper portion, most of the cooling air in the air duct 54 surely contacts the dividing plate 53. It is further heated. As a result, the temperature of the air in the air duct 54 becomes high, and a strong drafting force is generated. In the cooling passage 12 communicating with the air duct 54, a large amount of cooling air flows from outside the grill 2 along the lower surface of the pan 4. To cool the pan 4.

Further, since the dividing plate 53 is inclined, the angle formed between the cooling passage 12 and the air duct 54 increases, and the cooling air flows smoothly. Moreover, since the dividing plate 53 extends above the top plate 73, the draft force increases due to the height difference between the inlet of the cooling passage 12 and the air outlet 58. In addition, since the heat exchange distance of the air duct 54 increases, the temperature above the air duct 54 increases, and the draft force further increases. As a result, the flow speed of the cooling air increases without trapping in the air duct 54, and
Is further cooled. Further, the split plate 53 is heated by the combustion exhaust gas at about 250 ° C. passing through the exhaust discharge duct 56, and the fin 55a is also heated. The cooling air in the air duct 54 is heated by contacting the dividing plate 53 and the fin 55a,
The draft force is increased, and the tray 4 is further cooled.

Such a grill 1 can be properly used as a waterless grill that does not fill the tray 4 with water. The factors are listed below. 1. Lower burner 6 and fire transfer burner 18
Flame is basically a Bunsen flame with little radiant heat,
The temperature rise near the lower part of the grill storage 2 can be suppressed,
The baked fat G stored in the saucer 4 is hardly ignited.
2. By arranging the upper burners 5 on the left and right side surfaces of the grill storage 2 and tilting them upward, the radiant heat is not directly applied to the pan 4, and the temperature rise of the pan 4 can be suppressed.

3. Since the all-primary type is used for the upper burner 5, the cooking exhaust F can be heated with a small gas consumption by keeping the combustion exhaust gas in the grill storage 2 while maintaining good combustion. Prevent overheating. 4. Cooling passage 1
Since the air duct 54 communicating with the tray 2 is provided, a large amount of cooling air is caused to flow along the lower surface of the tray 4 by the draft force to prevent the tray 4 from overheating.

Thus, the grill 1 can be properly used as a waterless grill. That is, prior to cooking, it is not necessary to put water in the saucer 4 for receiving the baked fat G, or to drain the food after the cooking is completed. In addition, it is possible to prevent ignition due to forgetting to put water, and use it with peace of mind. Further, since water is not used for heating and cooking, the object to be cooked F can be roasted. In addition, saucer 4
Since the fluorine coating on the surface does not peel off due to overheating, the pan 4 can be easily cleaned.

Further, since the flame shielding device 52 formed of a perforated plate is provided in the exhaust discharge duct 56,
Even if the baked fat G coming out of the cooking object F ignites in the fire, the flame is blocked by the flame shielding device 52 and the exhaust outlet 5
7, the hot air discharge passage 3 on the downstream side
Since it does not flow to 1, the flame does not overflow to the outside of the body, and can be used more safely.

As described above, in the gas cooker of this embodiment, the combustion exhaust gas passing through the exhaust
The air in the hot air discharge duct 39 is heated to generate a draft force, so that the hot air in the hot air discharge passage 31 is smoothly discharged to the outside of the grill storage 2 and the hot air discharge passage is formed by the cool air supplied from the upper air supply port 31a. The temperature rise of the top plate 73 can be reduced by reducing the temperature rise of the top plate 73.

By inclining the hot air discharge passage 31 so that its upper surface becomes higher as it is closer to the hot air discharge duct 39, the hot air in the hot air discharge passage 31 is smoothly moved along the upper surface of the hot air discharge passage 31. To the hot air discharge duct 39 to reduce the temperature rise of the hot air discharge passage 31.

Since the hot air discharge duct 39 is narrower than the exhaust discharge duct 56, most of the air in the hot air discharge duct 39 comes into contact with the partition plate 26 and is heated, and the draft force in the hot air discharge duct 39 increases. As a result, a large amount of cooling air cools the hot air discharge passage 31 and the rise in the surface temperature of the top plate 73 can be reduced.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments at all, and it is needless to say that the present invention can be implemented in various modes without departing from the gist of the present invention. is there. For example, the present invention may be applied not to a grill without water but to a grill having a structure in which a saucer is filled with water. Moreover, you may employ | adopt not a double-sided grill but a single-sided grill. Also, as shown in FIGS.
An air supply passage 25 communicating with the upper air supply port 31a is provided upright on the left and right outer sides of the grill storage 2 and a lower air supply port 25a is formed at the lower end thereof, thereby allowing the upper air supply port 31a to be provided from outside the grill storage 2 to the vicinity. The cooler air may be sucked and flown to the hot air discharge passage 31 through the air supply passage 25 to reduce the temperature rise of the top plate 73. The hot air discharge passage 31 may be horizontal without being inclined. Further, the hot air discharge duct 39 does not need to be configured to be narrower than the exhaust discharge duct 56.

[0054]

As described in detail above, claim 1 of the present invention
According to the described gas cooker, the hot air generated in the hot air discharge passage by the draft force in the hot air discharge duct is pulled to the hot air discharge duct and discharged to the outside of the body. At this time, since the cold air outside the grill warehouse is sucked from the air supply opening of the hot air discharge passage, the rise in the surface temperature of the top plate due to the heat inside the grill warehouse can be reduced.

Further, according to the gas cooker according to the second aspect of the present invention, since the air supply port is formed on the left and right sides of the hot air discharge passage, the hot air in the hot air discharge passage flows backward to the front side. Can be prevented. As a result, an increase in the surface temperature at the front part of the top plate can be reduced.

Further, according to the gas cooker according to the third aspect of the present invention, the hot air generated in the hot air discharge passage is guided to the hot air discharge duct along the inclined upper surface of the hot air discharge passage. Can be further promoted.

Further, according to the gas cooker according to the fourth aspect of the present invention, since the air in the hot air discharge duct easily comes into contact with the partition plate and is efficiently heated, the draft force is increased and the hot air is discharged. The duct and the top plate can be further cooled.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a double-sided grill viewed from the side.

FIG. 2 is a cross-sectional view of the double-sided grill viewed from the front.

FIG. 3 is an external view of a table stove.

FIG. 4 is a perspective view of a lower burner.

FIG. 5 is a sectional view of a nozzle body.

FIG. 6 is a sectional view of an upper nozzle.

FIG. 7 is a view of the heat shield plate as viewed from above.

FIG. 8 is a cross-sectional view of the double-sided grill viewed from the side.

FIG. 9 is a sectional view of the double-sided grill viewed from the front.

FIG. 10 is a cross-sectional view of the double-sided grill viewed from the side.

FIG. 11 is a cross-sectional view of a double-sided grill of the related art as viewed from the side.

[Explanation of symbols]

1 ... grill, 2 ... grill storage, 5 ... upper burner, 6 ...
Lower burner, 25: air supply passage, 26: partition plate, 30 ...
Grill top plate, 31 ... hot air discharge passage, 32 ... heat shield side plate,
39: hot air exhaust duct, 44: gas pipe, 50: exhaust chamber, 51: exhaust exhaust duct front plate, 53: split plate, 5
4: air duct, 56: exhaust exhaust duct, 73: top plate, F: cooking object, G: roasted fat.

Claims (4)

[Claims] 1. A grill storage for heating and cooking an object to be cooked by the combustion heat of a burner, and an exhaust which is provided alongside a back of the grill storage and has an exhaust port opened upward to guide combustion exhaust in the grill storage to the outside. A gas cooker provided with a chamber, wherein a hot air discharge passage communicating with the exhaust chamber is provided between a top plate of a container housing the grill chamber and the exhaust chamber and the grill chamber; An exhaust port for taking in cooling air is opened, the exhaust chamber is divided by a partition plate, and an exhaust discharge duct that guides combustion exhaust in the grill chamber to the exhaust port, and an exhaust duct in the hot air discharge passage. A hot air discharge duct that guides hot air to the exhaust port is formed independently, and the partition plate is heated by exhaust heat flowing through the exhaust discharge duct to generate a draft force in the hot air discharge duct. For cooling The air sucked into the hot air discharge passage from the air inlet is discharged from the heat air discharge duct gas cooker, characterized in that to prevent the overheating of the top plate. 2. The gas cooker according to claim 1, wherein a front face of the hot air discharge passage is shielded, and the air supply port is formed on the left and right sides on the front side of the hot air discharge passage. 3. The gas cooker according to claim 1, wherein the hot air discharge passage is provided so as to be inclined such that the upper surface thereof becomes higher as the position is closer to the hot air discharge duct. 4. The gas cooker according to claim 1, wherein a passage cross-sectional area of the hot air discharge duct is smaller than a passage cross-sectional area of the exhaust discharge duct.