JP2006017389A - Cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooking device capable of cooking an object to be heated on a cooking plate arranged in a heating chamber by oven heating with good thermal efficiency with less uneven baking and realizing high energy saving performance.
SOLUTION: A heating chamber 7, a grill heater section 10 disposed above the ceiling surface of the heating chamber 7, a hot air unit 9 for circulating air in the heating chamber 7, and a duct disposed above the grill heater section 10. In the heating cooker provided with 35, upper ventilation ports 73a and 73b for blowing the air of the hot air unit 9 through the duct 35 are provided on the ceiling surface of the heating chamber 7 serving as the outer periphery of the grill heater section 10, and the duct 35b A part of the air passage wall is constituted by the grill heater section 10.
[Selection] Figure 1

Description

  The present invention relates to a cooking device that cooks an object to be heated with hot air.

  Conventionally, in a heating cooker in which two rectangular cooking dishes are arranged at the top and bottom of a heating chamber, and an object to be heated is placed on the cooking tray and cooked in an oven at a time, it is provided on the back of the heating chamber. Oven heating is performed by hot air circulated into the heating chamber from a hot air unit composed of a radial fan and a hot air heater through a ventilation port provided on the back surface of the heating chamber.

  The hot air circulated between the heating chamber and the hot air unit is supplied to the hot air unit through the air vent at the center of the radial fan located at the center of the back of the heating chamber between the two cooking dishes. The air that has been sucked in and heated in the hot air unit is blown out from the other vents at the back of the heating chamber.

  Moreover, what is disclosed by patent document 1 provides the storage recessed part which arrange | positions the heater for grill cooking in the ceiling part of the oven chamber (heating chamber) in which a cooking item (to-be-heated object) is accommodated, and this accommodation The recess and the hot air supply / circulation device (hot air unit) are communicated with each other through an air passage, a part of the hot air blown from the hot air supply / circulation device is guided to the storage recess through the air passage, and the hot air is blown out to the center of the oven cabinet.

JP-A-7-151333

  In the above-described conventional cooking device, the object to be heated placed on the cooking dish in the heating chamber is heated by circulating air heated inside the hot air unit, and the hot air blown out from the ventilation port is rotated by the radial fan. Since the wind speed distribution is uneven, heating unevenness is likely to occur in the object to be heated.

  In addition, since the ventilation port for blowing hot air from the hot air unit to the heating chamber and the ventilation port for sucking air from the heating chamber to the hot air unit are both provided only on the back surface of the heating chamber in which the hot air unit is disposed, It is difficult to heat the cooking pan uniformly.

  Moreover, in the heating cooker described in patent document 1, when two square-shaped cooking dishes are arrange | positioned in a heating chamber, since the flow of a hot air concentrates on the center, it is easy to produce baking unevenness.

  Further, since the heater attached to the upper surface of the heating chamber is disposed on the outer surface of the wall surface of the heating chamber, heat leakage to the outside is large and heat loss is likely to occur.

  Moreover, since the gap between the heater and the cooking pan is wide, the cooking speed of the grill is slow, and in order to solve this, if the gap between the heater and the cooking pan is narrowed, uneven baking during grill heating tends to occur.

  Further, since the exhaust duct and the hot air flow path are common, the hot air is likely to escape, heat loss is likely to occur, and energy saving performance is poor.

  Furthermore, since there is a heater housing recess that allows hot air to flow near the center of the upper surface of the heating chamber, foreign matter such as debris scattered from the object to be heated or dust in the warehouse adheres to the recess, and the heater is easily contaminated. Cleanability is not good.

  The present invention has been made to solve at least one of the above problems.

  The present invention has been made to solve the above-described problems. In claim 1, the heating chamber, a grill heater portion disposed above the ceiling surface of the heating chamber, and a hot air unit for circulating the air in the heating chamber. And a heating cooker provided with a duct disposed above the grill heater section, the top surface of the heating chamber serving as the outer periphery of the grill heater is provided with an upper ventilation port for blowing out the air of the hot air unit through the duct. .

  According to a second aspect of the present invention, there is provided a heating chamber, a grill heater portion disposed above the ceiling surface of the heating chamber, a hot air unit for circulating the air in the heating chamber, and a duct disposed above the grill heater portion. In the heating cooker, a part of the air passage wall of the duct connected to the hot air unit is constituted by the grill heater portion.

  Furthermore, in claim 3, the grill heater portion is constituted by a planar member.

  According to claim 1 of the present invention, in a configuration in which two square cooking dishes are arranged in the upper and lower stages of the heating chamber and oven heating is performed, hot air effective for heating cooking is supplied to the heating chamber, and hot air flowing into the heating chamber Can be efficiently circulated, and the object to be heated can be cooked with less uneven baking by oven heating with good thermal efficiency, and cooking with high energy saving performance can be realized.

  Further, according to the second aspect, since the heat of the grill heater portion is efficiently transmitted to the air passing through the duct, it is possible to perform oven cooking with less heat leakage and high energy saving effect.

  Furthermore, according to the third aspect, it is possible to provide a heating cooker that easily forms the duct wall surface above the grill heater portion and has high space-saving installation space and good oven heating efficiency.

  Examples of the present invention will be described below.

  1 and 2 are a side sectional view and a front sectional view showing a first embodiment of the present invention.

  In this embodiment, as an example of a heating cooker, a turntable type microwave oven in which square cooking dishes are arranged in two upper and lower stages in a heating chamber will be described.

  Here, the turntable type is a structure in which cooking is performed while rotating a circular cooking dish using a rotating shaft provided on the bottom surface of the heating chamber.

  In the figure, a heating chamber 7 is provided inside the cabinet 51 for storing the object to be heated 71 through the heat insulating material 54 and cooking the food, and an openable type in which the object to be heated 71 can be taken in and out of the front surface of the heating chamber 7. The door portion 52 is rotatably provided.

  A sensor unit 80 including an antenna motor (not shown) and a weight sensor (not shown) is disposed below the bottom surface of the heating chamber 7, and the rotating shaft of the sensor unit 80 is located near the bottom surface of the heating chamber 7. 80a protrudes.

  In addition, an operation panel (not shown) for setting cooking is provided on the side surface of the door portion 52, and an object to be heated 71 is placed in the machine room 2 arranged on the right side of the heating chamber 7 which is behind the operation panel. Components necessary for microwave heating, such as a magnetron 20, a control board 27, and a cooling fan 24, are provided.

  A microcomputer 28 for controlling the magnetron 20, the sensor unit 80, etc. is mounted on the control board 27.

  The magnetron 20 is connected to the microwave radiation port 56 of the heating chamber 7 and the waveguide 50, and the microwave energy radiated from the magnetron 20 passes through the waveguide 50 and the microwave radiation port 56 to the inside of the heating chamber 7. It has a structure that is radiated.

  On the left and right sides of the inner wall of the heating chamber 7, holding shelves 74 that protrude inward substantially in parallel with the bottom surface are provided in two upper and lower stages. Can be placed.

  Here, the holding shelf 74 may be arranged in three or more stages on the side surface of the heating chamber 7 and adjust the number of sheets to be used according to the cooking menu.

  As described above, when the cooking dishes 70 are arranged in the upper and lower stages in the heating chamber 7, the heating chamber 7 has the space 7a between the ceiling surface and the upper cooking dish 70a, the upper cooking dish 70a, and the lower cooking. The space is divided into three spaces: a space 7b between the plates 70b and a space 7c between the lower cooking plate 70b and the bottom surface of the heating chamber.

  A flat grill heater section 10 is provided on the upper side of the heating chamber 7, and ON / OFF and power control are performed according to an instruction from the microcomputer 28 during heating of the grill, for example, a cooking dish 70 a disposed in the upper stage of the heating chamber 7. The surface of the object to be heated 71a placed on the grill can be heated by grilling.

  Here, the grill heater unit 10 may be, for example, a flat mica heater or a configuration in which a plurality of flat quartz tube heaters or sheathed heaters are arranged, and furthermore, a metal plate is arranged on one or both sides thereof. The grill heater unit 10 may be configured to uniformly generate heat in the surface direction.

  As a result, the grill heater section 10 occupies a large area in the ceiling wall surface of the heating chamber 7, so even if the heated object 71 a is placed on the entire surface of the cooking dish 70 a placed on the holding shelf 74 a, the surface Can be heated evenly on the grill.

  Therefore, since many grill cooking can be performed at once, heat cooking with high energy-saving property can be performed.

  Here, if a plurality of holding shelves 74 are provided and heating is possible by adjusting the distance between the upper cooking pan 70a and the grill heater section 10, the heating / discharging of the heated object 71 is adjusted according to the menu, and the optimum A large number of heated objects 71 on the cooking plate 70 can be grilled at once by baking.

  Further, the upper ventilation port 73 is provided only on the outer periphery of the grill heater unit 10 on the ceiling surface of the heating chamber 7 in which the grill heater unit 10 is disposed, so that the surface of the grill heater unit 10 is not directly contaminated.

  Therefore, for example, an opening such as a punching hole is not provided between the grill heater 10 and the heating chamber 7 so that steam, food debris or the like enters the grill heater 10, and the object to be heated during cooking is not provided. Dirt due to scattering of 71 can be easily wiped off, and the cleaning property is also good.

  The rear wall 75 of the heating chamber 7 facing the door portion 52 is provided with ventilation holes 72 formed by a number of punching holes. The ventilation holes 72e for sucking air into the hot air unit 9 and the hot air heater 12 described later are heated. It is constituted by ventilation openings 72b and 72c for blowing out the air.

  Behind these ventilation openings 72b, 72c, 72e, a hot air unit 9 comprising a radial fan 30, a fan motor 32 connected to the fan 30, and a hot air heater 12 disposed below the outer periphery of the fan 30. The air 43e sucked from the air vent 72e is heated by the hot air heater 12, the hot air 43b, 43c is blown out from the air vents 72b, 72c, and the hot air circulates between the heating chamber 7 and the hot air unit 9. It has become.

  Here, the hot air heater 12 may be composed of, for example, a rod-like quartz tube and a sheathed heater, and may be provided with a large number of radiating fins on the surface thereof.

  Further, as long as the hot air heater 12 can be arranged inside the hot air unit 9, for example, the hot air heater 12 may be U-shaped or planar, and the number thereof may be one or two, or more than one. It may be configured to be used and arranged on the outer periphery of the fan 30.

  Further, in the hot air unit 9, a wind regulating plate (not shown) is provided on the outer periphery of the radiant fan 30 in accordance with the positions of the vent holes 72b and 72c, and the air blown from the radial fan 30 is efficiently guided to the vent holes 72b and 72c. It has become.

  A duct 35a is provided on the back side of the heating chamber 7 and is connected to the blowout port of the radial fan 30. A duct 35b is provided above the duct 35a so as to cover the grill heater section 10. In addition, a part 43d of the air blown out from the hot air unit 9 is heated by the grill heater 10 while passing through the duct 35a to the duct 35b, and the heated air 43da is provided on the ceiling surface of the heating chamber 7 It is configured to blow out from the opening 73 to the heating chamber 7.

  The duct 35b is fixed so that the bottom surface of the duct heater 35b is suppressed, and the heat of the grill heater section 10 can be efficiently transmitted to the air 43d through the wide air passage of the duct 35b. .

  Here, if one surface of the air path in the duct 35 b, for example, the bottom surface thereof is configured by the grill heater unit 10, the air 43 d can be heated more efficiently by exchanging heat, and the air from the upper side of the cabinet 51 can be heated. Oven cooking with high energy-saving effect can be performed by suppressing heat leakage.

  It goes without saying that heat can be more easily transferred to the air by providing irregularities on the upper surface of the grill heater section 10 serving as the bottom surface of the duct 35b and providing means for expanding the heat transfer area.

  Therefore, the air sucked from the vent 72e of the heating chamber 7 is blown out in the circumferential direction by the radial fan 30, and the upper vents 73a and 73b and the rear wall of the heating chamber 7 heated by the hot air heater 12 and the grill heater section 10 are heated. Hot air is blown out from the ventilation openings 72b and 72c.

  Here, in the present embodiment, the configuration is shown in which the cooking dishes 70 are arranged in the upper and lower stages in the heating chamber 7, but by adjusting the arrangement height of the vent 72, three or more dishes are prepared in the heating chamber 7. Needless to say, the flow configuration when the dish 70 is arranged can be easily realized.

  Further, if the size and height position of the vent 72 of the present embodiment is also adjusted, the speed, amount and direction of hot air blown out easily into the heating chamber 7 can be adjusted, and the type and size of the heated object 71 can be adjusted. Thus, oven heating with less uneven baking can be performed.

  The operation at the time of oven cooking in one embodiment of the present invention will be described with reference to FIGS.

  For example, the cooking pan 70 on which a heated object 71 such as a pan is placed is brought into contact with the back surface 75 of the heating chamber 7 while sliding the holding shelves 74 arranged on the left and right sides of the heating chamber 7 from the front door portion 52. After being pushed in and the cooking pan 70 is arranged in two upper and lower stages, the door portion 52 is closed and oven cooking is started.

  The start of the oven cooking is performed with a button on an operation panel (not shown) in front of the machine room 2 after the setting of the heating time and the heating temperature of the article to be heated 71 is completed.

  When cooking is started, the fan motor 32 installed on the rotating shaft of the radial fan 30 is driven to rotate, and the radial fan 30 in the hot air unit 9 rotates.

  Moreover, in oven cooking, since the wall surface of the heating chamber 7 becomes high temperature, the cooling fan 24 is driven in order to suppress the temperature rise of the machine chamber 2 due to heat leakage.

  Here, the driving of the cooling fan 24 may be performed constantly or intermittently with the cooking time, for example, by detecting the temperature of the fan motor 32 or the like.

  When the fan motor 32 is driven and the radial fan 30 is rotated, the air 43e is sucked into the hot air unit 9 from the ventilation port 72e disposed in the space 7b between the upper cooking dish 70a and the lower cooking dish 70b.

  In the hot air unit 9, the air blown to the outer periphery of the fan 30 through the radial fan 30 is heated by the hot air heater 12 disposed downstream of the fan 30, and the space between the upper cooking dish 70a and the lower cooking dish 70b. Hot air 43b, 43c is blown out to the heating chamber 7 from the ventilation port 72c arranged in the space 7c between the ventilation port 72b, the lower cooking plate 70b, and the bottom surface of the heating chamber 7 arranged in the heating chamber 7, and the grill heater is passed through the duct 35a. Air is supplied to the duct 35b disposed above the portion 10.

  In the duct 35b, air enters from the back side of the heating chamber 7 through the duct 35a, and the air 43d heated by the grill heater unit 10 is provided on the ceiling surface of the heating chamber 7 provided on the outer periphery of the grill heater unit 10. Blow out from 73a, 73b to space 7a of heating chamber 7.

  In the space 7 a, hot air 43 da blown out from the upper ventilation port 73 a located on the front side of the ceiling surface of the heating chamber 7 and the upper ventilation port 73 b on the side surface, and a grill heater portion that is transferred through the upper surface of the heating chamber 7. The heated object 71a of the upper cooking pan 70a is oven-heated by the 10 heat radiation.

  The air 43da blown out from the upper ventilation port 73 heats the article to be heated 71a and flows into the space 7b through the gap between the door portion 52 and the upper cooking dish 70a.

  On the other hand, in the space 7c, the hot air 43c blown from the ventilation opening 72c flows toward the door portion 52 while heating the back surface of the lower cooking pan 70b and the bottom surface of the heating chamber 7, and maintains the temperature of the space 7c at a high temperature.

  The air 43bc that has flowed to the door portion 52 flows upward through the gap between the door portion 52 and the lower cooking plate 72b and enters the space 7b. Together with the air 43ab that has entered from the space 7a, the air 43bc flows from the door portion 52 to the ventilation port 72e of the hot air unit 9. Flows through the space 7b.

  Therefore, in the space 7b, the surface of the heated object 71b on the back surface of the upper cooking dish 70a and the upper surface of the lower cooking dish 70b is heated by the hot air 43b blown from the ventilation opening 72b and the hot air 43ab and 43bc, and from the ventilation opening 72e. A flow for sucking air into the hot air unit 9 is configured.

  When the internal temperature of the heating chamber 7 in the oven heating is sensed by a temperature sensor (not shown) such as a thermocouple or thermistor provided on the side of the heating chamber 7 and the temperature of the heating chamber 7 is higher than a set value, The power supply to the grill heater unit 10 and the hot air heater 12 is stopped or the power is reduced, and only the radial fan 30 is rotationally driven.

  That is, the temperature of the heating chamber 7 is controlled by ON / OFF of the grill heater unit 10 and the hot air heater 12 and electric power.

  Here, if the temperature sensor (not shown) is a non-contact infrared temperature sensor, it is possible to directly measure the wall surface temperature of the heating chamber or the temperature of the object to be heated.

  As described above, in the heating cooker of the present invention, the upper ventilation openings 73a and 73b are provided on the outer periphery of the grill heater unit 10 located on the ceiling surface of the heating chamber 7, and the heat of the grill heater unit 10 is efficiently used to increase the temperature. Since the air 43da is blown into the space 7a, the heated object 71a of the upper cooking dish 70a can be cooked with less uneven baking, and the oven cooking of the heated object 71b of the lower cooking dish 70b flows from the space 7a to the space 7b. It can be performed by hot air 43ab, hot air 43bc that blows out from the ventilation port 72c, flows from the space 7c to the space 7b, and hot air 43b that blows out from the ventilation port 72b of the space 7b.

  Therefore, in the oven configuration of the present embodiment, the heat of the grill heater section 10 and the hot air heater 12 can be efficiently transferred to the hot air and cooked in the oven, so that heat cooking with high energy saving effect can be performed.

  FIG. 3 is a side cross-sectional view of a cooking device showing a second embodiment of the present invention. A gap 7d is provided between the back surface of the space 7a of the heating chamber 7 and the upper cooking plate 70a so that the upper cooking plate 70a is arranged. It becomes the composition.

  Here, the upper cooking pan 70a slides the holding shelf 74a and mounts it on the heating chamber 7. For example, if a protrusion is provided on the back surface of the heating chamber 7 or a stopper is provided on the holding shelf 74a, normal use In the state, the upper cooking pan 70a can be arranged so that the back surface of the heating chamber 7 and the gap 7d are open.

  Further, the front and rear positions of the upper cooking pan 70a may be arbitrarily adjusted according to the object to be heated by the user.

  In this embodiment, the configurations of the heating chamber 7 and the hot air unit 9 are the same as those in FIG.

  Further, in this embodiment, the machine room 2 in which components such as the magnetron 20 are mounted is arranged below the heating chamber 7, but may be arranged on the side surface of the heating chamber 7 as shown in FIG. In the first embodiment, the machine room 2 may be arranged on the bottom surface of the heating chamber 7 as in this embodiment.

  Therefore, the hot air 43da blown from the upper ventilation port 73 through the duct 35b flows through the gap between the door portion 52 and the upper cooking dish 70a toward the space 7b between the upper cooking dish 70a and the lower cooking dish 70b, and the heating chamber. 7 space 7a is divided into a flow from the door portion 52 toward the ventilation port 72e for intake of the radial fan 30.

  Here, if the ventilation opening 72e is arrange | positioned in both the space 7a and the space 7b on both sides of the upper cooking plate 70a, it will promote the flow of the hot air 7da which goes to the hot air unit 9 direction from the door part 52 through the clearance gap 7d. Thus, the heated object 71a can be efficiently heated.

  Moreover, since the upper cooking plate 70a is arranged closer to the door 52 than the lower cooking plate 70b, the hot air 43bc from the space 7c below the lower cooking plate 70b to the space 7b is difficult to flow back to the space 7a, and the space 7b The flow can be stabilized.

  Further, if the gap between the door portion 52 and the upper cooking pan 70a is made extremely narrow, the flow of hot air circulating above the upper cooking pan 70a (from the hot air unit 9 blows out from the upper vent 73 through the duct 35b. The air 43da is circulated between the space 7b and the space 7c, and the hot air flow that circulates below the upper cooking pan 70a (the hot air 43b and 43c blown from the ventilation ports 72b and 72c). Stream) can be separated.

  Here, a configuration in which the upper cooking pan 70a is in contact with the door portion 52 may be used.

  As described above, in this embodiment, in the oven configuration in which the square cooking dishes 70 are arranged in the upper and lower stages in the heating chamber 7, the heated object 71a of the upper cooking dish 70a is heated by the heat generated by the grill heater unit 10, and the upper Since it can be heated efficiently by both hot air blown out from the ventilation port 73 and flowing in the vicinity of the object to be heated 71a, high oven performance can be realized with high energy saving effect and less uneven baking.

  4 and 5 are a side sectional view and a front sectional view of a heating cooker showing a third embodiment of the present invention. From the hot air unit 9 to the space 7a of the heating chamber 7 in the heating cooker of the first embodiment. It is the structure which provided the ventilation port 72a which blows off hot air.

  In this embodiment, the internal configuration and method of use of the heating chamber 7 are the same as in FIGS.

  Here, it goes without saying that the same hot air flow can be configured even if the machine room 2 is arranged below the heating chamber 7 as shown in FIG.

  The ventilation opening 72a is provided between the upper surface on the back side of the heating chamber 7 and the upper cooking pan 70a, and a part 43a of the air circulating in the radial fan 30 of the hot air unit 9 is heated by the hot air heater 12 and blown out. The

  Here, in the hot air unit 9 of the present embodiment, the hot air heaters 12 are provided above and below the radial fan 30, but may be configured by a single hot air heater as shown in FIG.

  In the present embodiment, a part of the hot air flowing through the duct 35a is blown out from the air outlet 72a, and the door portion while the hot air 43a heats the heated object 71a of the upper cooking dish 70a through the space 7a of the heating chamber 7. It flows toward 52.

  That is, the heated object 71a in the space 7a is heated by the air 43a blown from the vent 72a, hot air 43da blown from the upper vent 73 through the duct 35b, and the heat of the grill heater section 10.

  Thus, in the cooking of the present invention, the heat of the grill heater unit 10 is efficiently transmitted to the air using the duct 35b provided above the grill heater unit 10, and the heat leakage above the cabinet 51 is suppressed. Hot air oven cooking with high energy-saving effect can be performed.

It is side surface sectional drawing of the heating cooker which shows the 1st Example of this invention. It is front sectional drawing of the heating cooker which shows the 1st Example of this invention. It is side surface sectional drawing of the heating cooker which shows the 2nd Example of this invention. It is side surface sectional drawing of the heating cooker which shows the 3rd Example of this invention. It is front sectional drawing of the heating cooker which shows the 3rd Example of this invention.

Explanation of symbols

2 Machine room 7 Heating room 9 Hot air unit 10 Grill heater part 12 Hot air heater 20 Magnetron 21 Power supply coil 24 Cooling fan 30 Radial fan 32 Fan motor 35 Duct 50 Waveguide 52 Door part 70 Cooking dish 72 Ventilation opening 73 Ventilation opening

Claims (3)

  A heating chamber, a grill heater section disposed above the ceiling surface of the heating chamber, a hot air unit for circulating the air in the heating chamber, and a duct disposed above the grill heater section, and at least an outer periphery of the grill heater section; A heating cooker comprising an upper ventilation port for blowing out air of a hot air unit through a duct on a ceiling surface of the heating chamber.   A duct that includes a heating chamber, a grill heater portion disposed above the ceiling surface of the heating chamber, a hot air unit that circulates air in the heating chamber, and a duct that is disposed above the grill heater portion, and is connected to the hot air unit A part of the air passage wall is configured by the grill heater section. The cooking device according to claim 1 or 2, wherein the grill heater section is constituted by a planar member.

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