JP5828850B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device. In particular, the present invention relates to a cooking device having a gas stove section and a heating chamber.

  Conventionally, a cooking stove such as a pan is heated with a stove burner, and a direct heating means such as a gas combustion type grill burner or an electric heater is arranged below the gas stove to bake fish. There is known a heating cooker including a heating chamber that is installed and performs grill cooking. According to the heating cooker having a heating means directly in the heating chamber, the food to be cooked can be cooked at a high temperature, so that the food to be cooked can be burnt firmly and excellent in appearance when finished. Depending on the type and size of the item to be cooked, uneven baking is likely to occur, and protrusions such as a burner are disposed in the heating chamber, making it difficult to care for cleaning.

  On the other hand, a heating cooker has also been proposed in which heating means for generating hot air is provided in a separate chamber from the heating chamber, and the generated hot air is supplied to the heating chamber and circulated to perform oven cooking (for example, Patent Document 1). .

  This type of heating cooker is, for example, a combustion chamber that generates gas of combustion exhaust gas by burning gas by a heating means such as an oven burner, a heating chamber that communicates with the combustion chamber and accommodates an object to be cooked, A circulation fan is provided, and while the hot air generated in the combustion chamber is fed into the heating chamber, the food to be cooked is indirectly cooked by circulating the hot air into the heating chamber. For this reason, compared with the case where a direct heating means such as a grill burner is provided in the heating chamber, uneven baking is less likely to occur in the cooking object, and it is possible to bake evenly into the cooking object. Further, by circulating hot air, heat can be quickly distributed throughout the heating chamber, so that cooking in a short time becomes possible. Furthermore, since no protrusion such as a grill burner is provided in the heating chamber, the heating chamber can be easily maintained.

JP 2000-249343 A

  By the way, in the heating cooker as described above, in recent years, it is required to reduce the gap on the front panel and the top plate as much as possible due to design restrictions and the like. Therefore, intake of combustion air into the stove body becomes insufficient, and when cooking using the gas stove and heating chamber is performed simultaneously, the pressure inside the stove body tends to be negative and exhaust from the heating chamber is discharged to the outside. There is a problem that a part of the exhaust gas leaks into the stove body from the gap of the exhaust passage to cause combustion failure in the stove burner. Since the exhaust passage is usually formed by joining a plurality of metal plates by caulking, welding, etc., in order to solve the above problems, the clearance of the exhaust passage is made of another member or a sealing material. Although it is conceivable to fill, there is a problem that an increase in the number of parts causes an increase in cost and an increase in the number of assembling steps, and it is difficult to completely seal such a small gap and it is difficult to put it to practical use. Furthermore, in a heating cooker having an oven burner, it is necessary to take external air as primary air by a circulation fan in order to generate gas by burning gas in the oven burner. Air is drawn into the combustion chamber in which the oven burner is disposed. As a result, compared with a heating chamber with a grill burner, the pressure inside the stove body becomes negative, exhaust gas leaking from the exhaust passage increases, and when the gas stove and heating chamber are used simultaneously, the combustion performance of the stove burner There is a problem that it tends to decrease.

  The present invention has been made to solve the above problems, and the object of the present invention is to enter the exhaust gas discharged from the heating chamber into the stove body even when cooking is performed simultaneously using the gas stove unit and the heating chamber. An object of the present invention is to provide a heating cooker that can prevent leakage of gas and prevent combustion failure of the stove burner.

The present invention includes a gas stove unit having a stove burner,
A heating chamber for heating an object to be cooked disposed below the gas stove part;
Heating means for generating hot air for heating the cooking object;
A circulation fan for circulating hot air generated by the heating means to the heating chamber;
An intake fan that is provided coaxially with the circulation fan and takes air into the stove body from outside;
The circulation fan, and a single motor that rotationally drives the circulation fan;
An exhaust passage communicating with the heating chamber and exhausting the exhaust in the heating chamber to the outside through a duct opening;
An air passage that communicates with the outside and cools the motor with air taken in by the take-in fan, and then exhausts the taken-in air to the outside from a discharge port;
The intake fan is accommodated in an intake fan case that constitutes a part of the air passage, and is disposed on the downstream side of the air passage from the motor.
The intake fan case is a heating cooker in which a communication part is formed that can supply a part of the intake air to the gas stove part when the intake fan is driven to rotate.

  When the stove cooking in the gas stove part and the oven cooking using the heating chamber are performed at the same time, the inside of the stove body tends to be negative pressure, but according to the heating cooker, the intake fan is provided separately from the circulation fan. Therefore, the outside air can be taken into the stove body by the taking-in fan. And the taken-in air is exhausted to the outside through the ventilation path in the stove body, but has a communication part that can supply a part of the air taken in by the ventilation path to the gas stove part. With the taken-in air supplied through the communication portion, it is possible to prevent a pressure drop in the stove body. Thereby, even when cooking using a gas stove part and a heating chamber is performed simultaneously, the leakage of the exhaust_gas | exhaustion from an exhaust passage into a stove main body can be suppressed.

Further , according to the heating cooker, since the intake fan is provided coaxially with the circulation fan, when the motor is driven to start the oven cooking, the intake fan that rotates in synchronization with the circulation fan is externally provided. The air can be taken in. Therefore, it is possible to prevent a pressure drop in the stove main body while cooling the motor with the air flowing through the air passage whenever the oven is cooked.

Further, according to the cooking device, since the intake fan is disposed on the downstream side of the motor, the air taken in from the outside is accommodated in the downstream intake fan after the upstream motor is cooled. Flows into the intake fan case. And since the communicating part is formed in the intake fan case on the downstream side of the motor, the motor located on the upstream side of the air passage can be efficiently cooled and the air after cooling the motor The pressure drop in the stove body can be prevented by utilizing a part of the stove.

In the heating cooker, preferably,
The motor is housed in a motor chamber that communicates with an air introduction portion formed on a constituent wall of the stove body.

  According to the cooking device, the air passage communicates directly with the outside, so that the outside air can be smoothly taken into the stove body.

  As described above, according to the present invention, by rotating the intake fan, a part of the intake air can be supplied from the communication part provided in the air passage to the gas stove part. As a result, the pressure drop in the stove body can be suppressed, so that leakage of exhaust gas from the exhaust passage can be prevented, and cooking using the gas stove part and the heating chamber can be performed simultaneously while preventing combustion failure of the stove burner. It can be carried out.

FIG. 1 is a schematic exploded perspective view showing an example of a state in which a heating cooker according to an embodiment of the present invention is housed in an opening of a system kitchen. FIG. 2 is a partial schematic cross-sectional perspective view showing the vicinity of the heating chamber of the heating cooker according to the embodiment of the present invention. FIG. 3 is a schematic perspective view of a main part of a transverse section showing a rear portion of the cooking device according to the embodiment of the present invention. FIG. 4 is a main part schematic perspective view showing a rear portion of the heating cooker according to the embodiment of the present invention.

  Hereinafter, the cooking device according to the present embodiment will be specifically described with reference to the drawings.

  FIG. 1 is a schematic exploded perspective view showing an example of a system kitchen in which the heating cooker of the present embodiment is accommodated, and FIG. 2 is a partial schematic sectional perspective view showing the vicinity of the heating chamber of the heating cooker. In FIG. 2, a stove main body such as a stove burner is omitted to avoid complication.

  The heating cooker according to the present embodiment is a built-in gas stove in which the stove body 100 is incorporated into the opening K1 of the countertop K of the system kitchen in a state of being dropped, and the stove body 100 and the upper open portion of the stove body 100 are provided. And a top plate 200 for covering. A main body case 120 that constitutes the outline of the stove main body 100 is configured by fixing a plurality of sheet metals formed in a predetermined shape by a joining means such as welding or caulking. In the stove main body 100, a gas stove unit 300 having two stove burners 310, 310 arranged side by side on the left and right, and a heating chamber in which a cooking object is stored below the gas stove unit 300 via a heat shield metal plate 400. (Oven box) 3a and a combustion chamber 3b are disposed further below the heating chamber 3a. Each stove burner 310 is disposed so as to protrude from the surface of the top plate 200 through a burner opening 210 provided in the top plate 200, and gas is supplied from a gas supply pipe (not shown). The stove cooker can be cooked on the stove burner 310. In addition, a liquid crystal display device 320 that displays the operating state, cooking temperature, and the like is disposed in front of the gas stove unit 300 so that the display panel can be visually recognized through the display window 230 provided on the top plate 200. It has become. Further, at the rear of the top plate 200, an exhaust port 220 is opened in which a duct opening 55 of the exhaust passage 5 described later and a discharge port 85 of the ventilation path 8 face. In this specification, the direction in which the door 32 side and the back side of the heating chamber 3a face each other is referred to as the front-rear direction, the width direction of the heating chamber 3a is referred to as the left-right direction, and the height direction of the heating chamber 3a is referred to as the up-down direction.

  The heating chamber 3a is horizontally long on the left side of the stove main body 100, and by opening and closing the door 32, an object to be cooked can be taken in and out of the heating chamber 3a.

  Specifically, when the door 32 is rotated forward, the plate 13 can be pulled out, and after placing an object to be cooked such as fish on the pulled out plate 13, the door 32. To be cooked is accommodated in the heating chamber 3a. Further, the operation panel 110 is provided with switches such as a fire extinguisher switch for performing cooking on a stove or oven, and an operation unit (not shown) that opens forward by pressing the lower part of the operation panel 110. The operation unit is provided with a cooking menu switch for selecting fish dishes, fried food dishes, and the like.

  As shown in FIG. 2, the heating chamber 3a includes an upper wall 33 that constitutes a ceiling portion, a lower wall 34 that partitions the lower combustion chamber 3b, left and right side walls 35, and a rear (back side) rear wall 36. The front surface is closed by the door 32 so as to be openable forward. In addition, a large number of exhaust holes 33a communicating with the duct opening 55 through the exhaust passage 5 formed above the upper wall 33 are formed in the rear central portion of the upper wall 33 of the heating chamber 3a.

  As shown in FIGS. 2 and 3, the rear wall 36 of the heating chamber 3 a is formed with a number of suction ports 31 for taking in the hot air in the heating chamber 3 a at the center, and a number of suction ports 31 are provided on the left and right sides thereof. The blower outlet 21 is formed. Further, a heat shield plate 38 is attached to the rear surface of the rear wall 36 so as to be separated from the rear wall 36 except for a region where the suction port 31 between the left and right outlets 21 and 21 is formed. A hot air passage forming member 45 is disposed behind the heat shield plate 38 so as to surround the heat shield plate 38. The hot air passage forming member 45 has a front end portion on the upper surface connected to the rear surface of the rear wall 36, and front end portions on both side surfaces connected to the rear surface of the rear wall 36 between the suction port 31 and the outlet 21. However, the lower part between the heat shield plate 38 and the hot air passage forming member 45 is open to the combustion chamber 3b. Thereby, the hot air channel | path 44 for supplying the hot air of the combustion exhaust gas generated in the combustion chamber 3b to the heating chamber 3a is formed.

  The combustion chamber 3 b includes a lower wall 34 that constitutes a ceiling wall of the combustion chamber 3 b, a bottom surface that is opposed to the lower wall 34, left and right side surfaces, and a rear part that is located slightly behind the hot air passage forming member 45. An oven burner 43 to which gas is supplied via a gas supply pipe (not shown) is disposed behind the combustion chamber 3b. Further, the cooking device has an air intake port communicating with the outside on the lower front surface or the like of the stove body 100, and is configured such that when the circulation fan 6 is rotated, air is taken into the combustion chamber 3b from the outside. Has been. Accordingly, the taken-in air, which is combustion air, and the gas are mixed and burned by the oven burner 43, whereby hot air of combustion exhaust gas is generated in the combustion chamber 3b.

  Further behind the position where the oven burner 43 is disposed, the hot air passage 44 communicated with the heat shield plate 38 and the hot air passage forming member 45 described above is in communication with the hot air generated in the combustion chamber 3b. It is sent to the passage 44.

  An opening 45 a for sucking hot air through the hot air passage 44 by the circulation fan 6 described later is formed at a position facing the suction port 31 of the hot air passage forming member 45.

  As shown in FIGS. 2 and 3, a circulation fan case 60 is disposed behind the hot air passage forming member 45 so as to surround the hot air passage 44 formed behind the heating chamber 3a. The circulation fan case 60 is closed at the rear surface except for the insertion portion through which the rotation shaft of the motor 4 is inserted, and the front end portion of the upper surface, the bottom surface, and both side surfaces are joined to the peripheral edge of the rear wall 36 and closed. Has been. As a result, a circulation passage 61 is formed which communicates with the hot air passage 44 through the opening 45a and communicates with the outlets 21 attached to the left and right sides of the rear wall 36 of the heating chamber 3a. A circulation fan 6 for forcibly circulating hot air in the heating chamber 3a is disposed in the circulation passage 61.

  The circulation fan 6 of the present embodiment is a suction-type circulation fan that is disposed downstream of the oven burner 43 in the hot air flow path. The circulation fan 6 is fixed to the tip of the rotating shaft of the motor 4 located at the rear, and corresponds to the formation area of the suction port 31 at the center of the rear wall 36 and the opening 45 a of the hot air passage forming member 45. Is installed. Therefore, when the motor 4 is energized to rotate the circulation fan 6, hot air in the heating chamber 3 a is sucked into the circulation passage 61 through the suction port 31 formed in the rear wall 36 and the lower combustion chamber. The hot air generated in 3b passes through the hot air passage 44 and is sucked into the circulation passage 61 from the opening 45a. And the sucked hot air is sent out into the heating chamber 3a from the blower outlets 21 located on the left and right sides of the rear wall 36. As a result, hot air is forcibly circulated in the heating chamber 3a, the temperature in the heating chamber 3a is rapidly increased, and the temperature can be made uniform efficiently. Fish or meat contained in the heating chamber 3a Etc. can be cooked in an oven.

  A motor chamber 40 in which the motor 4 is accommodated is provided behind the circulation fan case 60 constituting the circulation passage 61. The motor chamber 40 includes a cylindrical motor case 42 having an opening in the front-rear direction. The front of the motor case 42 has an opening 41a of a cooling fan case (take-in fan case) 41 disposed adjacent thereto. The rear part communicates with an air introduction hole (air introduction part) 150 exposed to the outside provided in the rear wall 121 of the main body case 120 so that air is taken in from the outside.

  The cooling fan case 41 is disposed between the circulation fan case 60 and the motor case 42, and the cooling fan case 41 includes a cooling fan (taken in) that is fixed to an intermediate portion in the axial direction of the rotating shaft of the motor 4. Fan) 7 is accommodated. The opening 41a through which the rotation shaft of the motor 4 is inserted is formed larger than the diameter of the rotation shaft of the motor 4 so that the motor chamber 40 and the cooling fan case 41 communicate with each other. In addition, the bottom surface of the cooling fan case 41 and the front end portions of both side surfaces are joined and closed to the rear surface of the circulation fan case 60. Further, although not shown, the cooling fan case 41 is formed to be larger than the diameter of the cooling fan 7 so as to protrude to the right side when viewed from the front, and the protruding side upper part is the air taken in by the cooling fan 7. Is opened upward to discharge the water to the outside. As shown in FIGS. 2 and 4, the upper portion of the cooling fan case 41 extends rearward beyond the upper side of the motor chamber 40, and is bent upward and extends upward toward the discharge port 85. The passage member 9 is connected. Thereby, when the cooling fan 7 is driven to rotate, the air introduction hole 150 formed in the rear wall 121 of the main body case 120 at the upstream end and the discharge port 85 at the downstream end communicate with each other, and the taken-in air is discharged from the discharge port 85. A ventilation path 8 for discharging to the outside is formed.

  In the present embodiment, the ventilation path 8 communicates with the motor chamber 40 via the opening 41 a of the cooling fan case 41, but is not in communication with the circulation path 61 by the circulation fan case 60. The compartments are separated so that the taken-in air is not sent into the hot air passage 44. Thereby, the temperature drop of the hot air by the air taken in by the cooling fan 7 is prevented.

  Further, a plurality of communication holes 70 communicating with the inside of the stove main body 100 are formed on the left and right side surfaces of the cooling fan case 41. As will be described later, when these cooking holes 70 perform oven cooking using the heating chamber 3a, when the motor 4 is energized to rotate the cooling fan 7 and the air taken into the ventilation path 8 flows, A part thereof functions as a communication unit that supplies the gas stove unit 300.

  As described above, the exhaust passage 5 communicating with the exhaust hole 33a is formed behind the upper wall 33 constituting the ceiling portion of the heating chamber 3a. The exhaust passage 5 is opposed to the upper wall 33 at a predetermined interval and spaced apart from the exhaust cover 51. The exhaust cover 51 extends horizontally rearward, and the upper surface of the circulation fan case 60 is connected to the upper peripheral edge of the rear wall 36 of the heating chamber 3a. And a partition plate 52 that extends in the horizontal direction from the rear to the rear and extends upward toward the duct opening 55. The upper end of the partition plate 52 forms a downstream end of the exhaust passage 5 and a downstream end of the ventilation path 8. Further, the duct opening 55 of the exhaust passage 5 and the discharge port 85 of the ventilation passage 8 communicate with the exhaust port 220 formed in the top plate 200. As a result, the ventilation path 8 is arranged behind the stove body 100 in a state of being separated and separated from the exhaust passage 5 by the partition plate 52, and the exhaust from the exhaust passage 5 and the air from the ventilation path 8 are The air is discharged from the single exhaust port 220 to the outside.

  In the heating cooker according to the present embodiment, in order to perform oven cooking, when an object to be cooked is accommodated in the heating chamber 3a, the motor 4 is energized and the circulation fan 6 is driven to rotate, external air enters the combustion chamber 3b. When the gas is supplied to the oven burner 43 and ignited in this state, the hot air of the combustion exhaust gas generated by the oven burner 43 is sent into the heating chamber 3a, and the hot air is forcibly generated in the heating chamber 3a. Start to circulate. During oven cooking, while the circulation fan 6 is rotating, outside air is taken into the combustion chamber 3b, so that a part of the hot air in the heating chamber 3a is exhausted including oil smoke generated from the object to be cooked. Then, the gas is discharged from the exhaust hole 33 a of the upper wall 33 to the exhaust passage 5.

  At this time, if the stove burner 310 is also ignited to perform the stove cooking in the gas stove unit 300, it is necessary to take in combustion air not only in the oven burner 43 but also in the stove burner 310. Negative pressure. In particular, when oven cooking is performed and the circulation fan 6 is rotationally driven, not only external air is taken in from an air intake port formed at the lower front of the stove body 100, but also a combustion chamber 3b is formed. Since the air in the stove body 100 is drawn in order to burn the oven burner 43 from the gap between the metal plates, the exhaust passage 5 configured by joining the metal plates in the same manner due to the pressure drop in the stove body 100 is provided. There is a risk that exhaust gas flowing through leaks into the stove main body 100 and combustion failure occurs in the upper stove burner 310. However, according to the heating cooker of the present embodiment, the cooling fan 7 provided coaxially with the circulation fan 6 is also synchronized with the circulation fan 6 when performing oven cooking in which the cooking object is heated in the heating chamber 3a. Thus, external air can be taken into the stove main body 100 from the air introduction hole 150 provided at the rear of the motor chamber 40. The taken-out external air flows through the motor chamber 40 as cooling air for cooling the motor 4, and then flows into the ventilation path 8 surrounded by the cooling fan case 41 and the circulation fan case 60. The gas can be supplied to the gas stove unit 300 in the stove main body 100 through the communication hole 70 provided on the side surface of the cooling fan case 41. As a result, the pressure in the stove main body 100 is unlikely to decrease, so that leakage of exhaust gas from the exhaust passage 5 can be suppressed and combustion failure of the stove burner 310 can be prevented.

  Further, the communication hole 70 for supplying a part of the taken-in air to the gas stove unit 300 in the stove body 100 is formed in the cooling fan case 41, and therefore is taken in from the outside through the air introduction hole 150 of the rear wall 121. The cooled air cools the upstream motor 4 and then flows into the cooling fan case 41 in which the downstream cooling fan 7 is accommodated. Thereby, while being able to cool the motor 4 located in the upstream of the ventilation path 8 efficiently, a part of the air after cooling the motor 4 is utilized, and the pressure drop in the stove main body 100 is reduced. Can be suppressed.

  Further, the exhaust discharged from the heating chamber 3a flowing through the exhaust passage 5 flows toward the duct opening 55, but the exhaust passage 5 is partitioned and separated adjacent to the ventilation path 8 by the partition plate 52 to the downstream end. Since it is disposed in a state, the exhaust gas passing through the exhaust passage 5 can be cooled by the air passing through the adjacent ventilation path 8. Thereby, it is possible to prevent the exhaust gas heated to a high temperature from being discharged from the exhaust port 220 to the outside. Further, the exhaust cooled by the air passing through the ventilation path 8 is discharged to the outside from the duct opening 55 provided at the rear of the stove body 100. In the present embodiment, the downstream end of the ventilation path 8 is exhausted. Since it is located behind the downstream end of the passage 5, two layers are formed, a layer in which high-temperature exhaust flows in front of the exhaust port 220 and a layer in which low-temperature cooling air flows in the rear. In particular, since the air passing through the ventilation path 8 is forcibly discharged from the discharge port 85 by the cooling fan 7, the exhaust speed is higher than that of the exhaust discharged through the exhaust passage 5 due to an increase in the pressure in the heating chamber 3a. Is fast and difficult to mix with hot exhaust. For this reason, even if the upper wall surface behind the countertop K is located behind the exhaust port 220, the wall surface can be protected from high-temperature exhaust. Further, a liquid crystal display device 320 that is an electronic component is disposed in front of the gas stove unit 300. When the stove cooking and the oven cooking are performed simultaneously, the gas stove unit 300 becomes hot and the heat-sensitive liquid crystal display device 320 has a low sensitivity. Although there is a risk of deterioration, according to the gas stove of the present embodiment, since the liquid crystal display device 320 can be cooled by the air supplied to the gas stove unit 300 by the cooling fan 7, the durability of the liquid crystal display device 320 is improved. Decline can be prevented.

(Other embodiments)
(1) In the above embodiment, the oven burner 43 is used as the heating means, but other heating means such as an electric heater may be used.

( 2 ) In the above embodiment, the motor 4 is housed in the motor case 42, but the motor case 42 may be configured without the motor case 42.

3a Heating chamber 4 Motor 5 Exhaust passage 6 Circulating fan 7 Cooling fan (take-in fan)
8 Air passage 40 Motor room 41 Cooling fan case (take-in fan case)
43 Oven burner (heating means)
55 Duct opening 70 Communication hole (communication part)
85 Discharge port 100 Stove body 150 Air introduction hole (air introduction part)
300 Gas stove section 310 Cooker burner

Claims (2)

A gas stove section having a stove burner;
A heating chamber for heating an object to be cooked disposed below the gas stove part;
Heating means for generating hot air for heating the cooking object;
A circulation fan for circulating hot air generated by the heating means to the heating chamber;
An intake fan that is provided coaxially with the circulation fan and takes air into the stove body from outside;
The circulation fan, and a single motor that rotationally drives the circulation fan;
An exhaust passage communicating with the heating chamber and exhausting the exhaust in the heating chamber to the outside through a duct opening;
An air passage that communicates with the outside and cools the motor with air taken in by the take-in fan, and then exhausts the taken-in air to the outside from a discharge port;
The intake fan is accommodated in an intake fan case that constitutes a part of the air passage, and is disposed on the downstream side of the air passage from the motor.
A cooking device in which the intake fan case is formed with a communication part capable of supplying a part of the intake air to the gas stove part when the intake fan is rotationally driven. The heating cooker according to claim 1 , wherein
The said motor is a heating cooker accommodated in the motor chamber connected to the air introduction part formed in the structural wall of the said stove main body.

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