JP2003322338A - Heating device with high temperature hot blast - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable high-speed cooking without requiring a preheating time, to enable high temperature hot blast heat-treatment at high temperature, for example, about 400°C, with a rising time for about ten seconds, to prevent an odor from transferring even when different foods are heat-treated by turns, and to easily clean inside. <P>SOLUTION: This heating device with a high temperature hot blast is provided with a housing body having a wall part delimiting a heat chamber wherein a table for mounting a heated thing is disposed. A hot blast supply opening is formed in one wall part of wall parts facing over the table among the wall parts of the housing body, and a hot blast discharge opening is formed in the other wall part. The high temperature hot blast blown off from the hot blast supply opening flows into the hot blast discharge opening in a direction crossing the heated thing mounted on the table. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device such as a microwave oven and a microwave oven, and more particularly to a heating device using both high temperature hot air and microwave heating.

[0002]

2. Description of the Related Art Conventionally, there has been a microwave heating device as a heating device for a microwave oven, a microwave oven and the like. This microwave heating device heats an object to be heated by so-called dielectric heating by irradiating the object to be heated with microwaves. This type of dielectric heating is to heat an object from the inside, rather than trying to apply heat to the object from the outside as with ordinary electric or gas heaters. Therefore, when using this for heating foodstuffs, etc., when the foodstuffs are warmed from the inside, water is evaporated from the inside, and the finish of taste and hardness depends on the normal heating method depending on the foodstuffs. Will be better than For these reasons, the microwave heating device has been conventionally applied as a commercial microwave oven, a household microwave oven, and a microwave oven for cooking various food materials.

However, this type of dielectric heating is good in that the food can be warmed from the inside, but it is not suitable for browning the outer surface of the food. Depending on the food material, it is required that the outer peripheral surface of the food material be colored beautifully. There is also a demand to cook foodstuffs faster. In order to meet such a demand, a microwave heating device that also uses hot air heating has been conventionally proposed.

[0004]

SUMMARY OF THE INVENTION In the conventionally proposed microwave heating apparatus which also uses hot air heating, hot air is placed on the turntable or the like arranged in the heating apparatus from the ceiling of the heating apparatus. It is designed to be sprayed onto the placed food. In such a conventional heating device,
In order to start cooking food with hot air, it is necessary to preheat the inside of the heating device to a temperature suitable for cooking, and in order to keep the temperature inside the heating device at a suitable and uniform temperature, a fan for circulating hot air inside the heating device is required. Is provided.

Such a conventional microwave heating apparatus combined with hot air heating is not suitable for high speed cooking because it requires a considerably long preheating time before cooking. The temperature that can be set for cooking is 300 ° C.
It was not suitable for grill cooking, where the degree was limited and higher temperatures were required. Furthermore, since a fan for circulating hot air is provided in the heating device, it is difficult to wipe off dirt and the like in the heating device. Furthermore, the odor of the previously cooked food or the like tends to remain in the heating device, and when different foods are alternately cooked, there is a concern that the odor may be transferred to other foods.

An object of the present invention is to provide a heating device for a microwave oven, a microwave oven, etc., which can solve the above-mentioned problems.

[0007]

According to the present invention, a heating device using high-temperature hot air is provided with a housing body having a wall portion defining a heating chamber in which a table for placing an object to be heated is placed. A hot air outlet is provided on one wall of the walls of the housing body that face each other across the table, and a hot air outlet is provided on the other wall. It is provided that the high-temperature hot air blown from the hot-air blow-out port is made to flow in one direction to the hot-air discharge port so as to traverse an object to be heated placed on the table. A heating device is provided.

According to one embodiment of the present invention, a microwave irradiator is provided on a wall of the wall located above the table.

According to another embodiment of the present invention, the table is a removable turntable.

According to yet another embodiment of the present invention,
An output conduit of a hot air generator is connected to the hot air outlet, and an exhaust conduit for discharging hot air to the outside is connected to the hot air outlet.

According to yet another embodiment of the present invention,
The hot air generator is capable of directly controlling the temperature and air volume of the hot hot air generated in the output conduit.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in more detail with reference to the accompanying drawings with regard to the embodiments and examples of the present invention.

FIG. 1 is a perspective view showing a microwave oven as an embodiment of a microwave heating apparatus using high temperature hot air of the present invention so that the inside of the refrigerator can be seen from the left side with the door open. 2 is a perspective view showing the microwave oven of FIG. 1 so that the inside of the refrigerator can be seen from the right side with the door opened, and FIG. 3 shows the microwave oven of FIG. 1 at the top of the housing body. FIG. 4 is a plan view showing the microwave oven of FIG. 1 with the right side wall portion of the housing body removed, and FIG. As shown in these drawings, the microwave oven of this embodiment includes a housing body 1 that defines a heating chamber inside, and a food item or other object to be heated is put in and taken out from the front surface of the housing body 1. A door 2 for opening and closing the opening is attached. Further, on the right side of the front surface of the housing body, an operation unit 3 for controlling heating power, heating time and the like is provided. At the bottom of the heating chamber defined by the housing body 1, a turntable 4 for placing an object to be heated such as food material is arranged. This turntable 4
It is detachable from the heating chamber.

As shown in FIG. 1, the microwave oven of this embodiment is provided with a microwave irradiator 5 on the ceiling of the heating chamber. This microwave irradiation unit 5
Although not shown, various types having a magnetron or the like as a microwave source may be used, but since these are known per se, they will not be described in detail here. The microwave irradiating unit 5 irradiates the object to be heated such as foodstuffs placed on the turntable 4 with microwaves so that the object to be heated can be dielectrically heated.

As shown in FIG. 1, a hot hot air outlet 6 is provided on the right inner wall of the heating chamber, and the hot air outlet 6 is covered with a punching cover 6A. . Furthermore, as well shown in FIG. 2, a hot air outlet 7 is provided at a position facing the hot air outlet 6 on the left inner side wall of the heating chamber. An exhaust cover 7A is provided. Further, the hot air exhaust port 7 is provided to the housing body 1 to an exhaust port (not shown) for exhausting to the outside (for example, the outside of a room such as a kitchen where this microwave oven is installed). An exhaust conduit 8 is provided for connection. With such a structure, the high-temperature hot air blown into the heating chamber from the hot-air outlet 6 is applied laterally to the object to be heated such as food placed on the turntable 4 in the heating chamber. Then, the air is discharged from the hot air exhaust port 7 on the opposite side through the exhaust conduit 8 to the outside through the exhaust conduit 8 so as to cross the same. In this way, the object to be heated such as foodstuffs placed on the turntable 4 is heated by the hot hot air while the hot hot air flows laterally from the hot air outlet 6 to the hot air outlet 7. Is done.

Further, as well shown in FIGS. 3 and 4, in the microwave oven of this embodiment, a hot air generator for generating high temperature hot air for blowing out from the hot air outlet 6 into the heating chamber. 100 is provided. The configuration and operation of this hot air generator 100 will be described in detail later.

Next, the operation when the food is cooked by the microwave oven having the above-described structure will be described with reference to FIG.

First, when it is desired to cook a certain food material by using both high temperature hot air heating and microwave heating, the door 2 is opened and the food is cooked on the turntable 4 as shown in FIG. Place the corrugated aluminum dish D containing the desired food F and close the door 2. Then, the high temperature hot air heating and the microwave heating are selected by the selection key in the operation unit 3, the power selection, the heating temperature, the heating time and the like are set, and the operation is started. Then, the turntable 4 is rotationally driven, and the microwave is applied to the food F that is rotating with the rotation of the turntable 4 by the bias of the microwave irradiation unit 5, as indicated by the thin arrow in FIG. It is irradiated. Thereby, the food material F is heated and cooked by dielectric heating. At the same time or after a lapse of a predetermined time, the hot air generator 100 is energized, and hot hot air is blown from the hot air outlet 6 toward the hot air outlet 7 as indicated by a thick arrow in FIG. The temperature of the high-temperature hot air can be set to an arbitrary temperature between about 200 ° C. and about 400 ° C. by the operation of the hot air generator 100 described later, and the rising time thereof is very short. For example, it can be about ten and several seconds. In this way, while the high-temperature hot air flows in one direction to the hot air discharge port 7 across the surface of the foodstuff F as shown by the thick arrow in FIG. It is heated by the high-temperature hot air, and a heat treatment for giving a burning color or the like is performed. In this case, even if the flow of high-temperature hot air is in one direction, the food F is rotated by the drive of the table 4, so that the high-temperature hot air causes the food F to rotate.
The heat treatment of can be made more uniform.

In the above description, cooking is performed by using both high temperature hot air heating and microwave heating, but it is of course possible to cook only by high temperature hot air heating or by microwave heating only. is there.

Next, the construction and operation of the hot air generator 100 used in the above-mentioned embodiment will be described in detail with reference to FIG. 6, FIG. 7 and FIG.

FIG. 6 is a schematic diagram showing the overall structure of the hot air generator 100, and FIG. 7 is a schematic view showing the hot air generator 100 of FIG.
FIG. 8 is a detailed view showing a portion of the burner body of FIG. 8, and FIG. 8 is a ceiling view of a portion of the burner body of the hot air generator 100 of FIG. As shown in these drawings, the hot air generator 100 of this embodiment includes a combustion blower 101, a mixing blower 102, a combustion blower power source 103, a mixing blower power source 104, an ignition igniter 105, and an ignition plug. 106 and a gas pressure equalizing valve 1 which is a kind of gas solenoid valve
07, a frame sensor (flame detection unit) 108, a temperature sensor 109, a main controller 110, a wind pressure detection pipe 111, a gas mixing pipe 112, a gas ejection nozzle 114, a gas diffusion nozzle 115, and a rectifying ring 1.
Burner body 113 including 16 and the like, and wind pressure detection output port 1
17, a gas conduit 118, and a heat induction tube 119. As shown in FIGS. 3, 4 and 5, the heat guide tube 119 serves to guide the high temperature hot air generated by the hot air generator 100 to the hot air outlet 6.

First, to explain the basic structure and operation of the hot air generator 100, the combustion blower 1 will be described.
The wind pressure detection output port 117 provided on the air outlet side of 01 and the wind pressure detection input port of the gas pressure equalizing valve 107 are connected by a wind pressure detection pipe 111. The combustion blower power source 103 receives an output control signal from the main controller 110,
A stepless rotation control output is output from the combustion blower power source 103 to the combustion blower 101. The gas pressure equalizing valve 107 detects the wind pressure of the wind pressure detection output port 117 which fluctuates thereby through the wind pressure detection pipe 111, and in accordance with the fluctuation of the wind pressure, the gas mixing pipe 1 passes from the gas inlet through the gas conduit 118.
The amount of gas flowing to 12 is varied to control the intensity of combustion. In order to control the combustion amount, a signal from a temperature sensor 109 attached to the tip of the heat induction tube 119 and arranged in the vicinity of the hot air outlet 6 is fetched into the main controller 110, and the signal from the temperature sensor 109 is actually used. The mechanism is to perform an optimal control by issuing an appropriate control signal based on the comparison between the temperature and the set temperature.

Next, the structure and operation of the burner body 113 of the hot air generator 100 will be described. The gas injection nozzle 114 connected to the gas output side of the gas pressure equalizing valve 107 by the gas conduit 118 and the combustion blower 10.
1. A gas mixing pipe 112 is provided at the tip of the air outlet side of 1, and
A gas diffusion nozzle 115 and a rectifying ring 116, which are provided so as to perform good mixing, are arranged at the center of the inside,
Air sucked by combustion blower 101 and gas equalization valve 107
Gas diffusion nozzle 1 supplied through the gas conduit 118
The gas ejected from No. 15 is mixed in the gas mixing pipe 112 and discharged from the tip of the burner body 113 to burn at the tip. Further, the burned gas is mixed with the air taken in by the mixing blower 102, and the mixed gas is guided to the heat induction tube 119. By guiding the air from the mixing blower 102 around the gas mixing pipe 112 to the heat induction pipe 119, the burner main body 113 and the heat induction pipe 119 near the burner main body 113 are prevented from being overheated, and the combustion heat is efficiently transferred to the inside of the chamber. It is structured to guide well.

Next, the combustion procedure in the hot air generator 100 will be described. The main controller 110 which receives the combustion start signal from the operation unit 3 causes the combustion blower power source 103 and the mixing blower power source 104 to operate.
The burner outputs an output control signal (initial ignition control) for sending an appropriate amount of air that is easily ignited and burned, and the main controller 110 receives the fact that the combustion blower 101 and the mixing blower 102 have reached the specified number of revolutions or more, and the ignition is performed. Signal to the ignition igniter 105 for ignition plug 106
More discharge. Then, the main controller 110
Further, a signal for opening the valve is sent to the gas pressure equalizing valve 107, and a gas having a flow rate corresponding to the strength of the wind pressure received by the gas pressure equalizing valve 107 from the wind pressure detecting pipe 111 is discharged to the burner tip through the gas mixing pipe 112. The ignition and combustion are started by the discharge from the ignition plug 106. When the combustion is started in this way, it is detected by the flame sensor 108, the main controller 110 is notified of the ignition, and the signal to the ignition igniter 105 is stopped. In addition, the combustion blower power source 103 and the mixed blower power source 10
The output at the time of normal combustion control is output to 4.

Next, the temperature control of the high temperature hot air generated by the hot air generator 100 will be described. The main controller 110 compares the set temperature with the actual temperature detected by the temperature sensor 109,
When the set temperature is higher than the temperature sensed by the temperature sensor 109, the combustion blower 101 outputs the maximum power so that the temperature sensed by the temperature sensor 109 reaches the set temperature earlier. When the temperature sensed by the temperature sensor 109 reaches the set temperature, the output to the combustion blower 101 is adjusted steplessly to stabilize the set temperature so that the set temperature can be maintained.

Next, the fire extinguishing procedure will be described. After the main controller 110 closes the output to the gas pressure equalizing valve 107 to stop the gas supply, the combustion blower 1
01 and the mixing blower 102 are continuously operated for a certain period of time so that the gas mixing pipe 112 and the burner main body 11
3. Prevent gas from remaining in the heat guide tube 119 and prevent the heat guide tube 119 from being overheated by residual heat after extinguishing the fire.

As can be seen from the above description of the operation, in the hot air generator 100, the temperature of the high temperature hot air generated by the hot air generator 100 is controlled by controlling the gas pressure equalizing valve 107 according to the output of the combustion blower 101. The amount of high-temperature hot air generated and controlled is maintained constant by the output setting of the mixing blower 102. For example, in other words, according to the hot air generator 100, the temperature of the hot air generated can be easily controlled from about 200 ° C. to about 400 ° C. by controlling the air flow rate by the combustion blower 101 and the gas supply amount by the gas pressure equalizing valve 107. In addition, by controlling the output of the mixing blower 104, the generated air volume of the hot air can be maintained at an arbitrary air volume suitable for the high temperature hot air heat treatment at each hot air temperature.

The control of the temperature and the air volume of the generated hot hot air can be performed relatively easily in the following case. First, the output of the mixing blower 102 is set to a predetermined value so that an air volume suitable for heat-treating the food to be heat-treated can be obtained. The temperature of the high-temperature hot air suitable for the high-temperature hot-air heat treatment of this food is, for example, 3
This temperature is assumed to be 50 ° C.
10 is stored as a set temperature. Combustion blower 1
01 is operated to cause gas combustion, and the temperature sensor 10
Detecting the actual temperature of the hot air generated at 9,
By comparing this sensed temperature with the set temperature stored in the main controller 110, the main controller 101 controls the combustion blower 10 so that the actual temperature of the hot hot air becomes the set temperature of 350 ° C. based on the comparison.
The output of 1 and the gas supply amount are controlled.

As described above, in the hot air generator of this embodiment, since the temperature of the hot air generated is directly controlled, preheating from the start of the device until the hot air reaching the set temperature is obtained. It is possible to make the time very short, that is, the rise time is short, and for example, even at the set temperature of 400 ° C., it is possible to make it about 10 seconds or more.

In the heating device of the present invention, as the hot air generator for generating high temperature hot air for blowing out from the hot air outlet to the inside of the refrigerator, the hot air generator as described above with reference to FIGS. 6 to 8 is used. As I explained,
The present invention is not limited to the use of such a hot air generator, and any hot air generator can be used as long as it can supply high temperature hot air to the hot air outlet.

[0031]

According to the present invention, the high-temperature hot-air heat treatment is performed by flowing the high-temperature hot-air adjusted to the set temperature in one direction from the hot-air outlet to the hot-air outlet facing the hot-air outlet. Since it is performed, high-speed cooking is possible without requiring preheating time, as compared with the conventional method in which hot air is circulated to perform heat treatment.

Further, since the hot air is not circulated, the temperature of the high temperature hot air blown from the hot air outlet may be set as the set temperature.
Even a high-temperature hot-air heat treatment at about ℃ can be performed with a startup time of about 10 seconds.

Furthermore, since the hot hot air is not circulated by only flowing in one direction, the odor of the foodstuffs and the like generated in the storage due to the heat treatment is not retained, so when different foodstuffs are heat-treated alternately. But you don't have to worry about the odor.

Since it is not necessary to provide a fan or the like for circulating the hot air inside the refrigerator, the inside of the refrigerator can be easily cleaned. Therefore, it is possible to completely wipe off stains and the like in the refrigerator, and there is no need to be concerned about the transfer of odor to foods and the like.

[Brief description of drawings]

FIG. 1 is a perspective view showing a microwave oven as an embodiment of a microwave heating apparatus using high temperature hot air according to the present invention, with a door opened so that the inside of the refrigerator can be seen from the left side.

FIG. 2 is a perspective view showing the microwave oven of FIG. 1 so that the inside of the refrigerator can be seen from the right side with the door opened.

FIG. 3 is a plan view showing the microwave oven of FIG. 1 with the top of the housing body removed.

FIG. 4 is a right side view showing the microwave oven of FIG. 1 with the right side wall portion of the housing body removed.

5 is a diagram schematically showing the structure of the inside of the refrigerator for explaining the overall operation of the microwave oven of FIG. 1. FIG.

FIG. 6 is a schematic diagram showing the overall configuration of a hot air generator used in the microwave oven of FIG.

7 is a detailed view showing a portion of the burner body of the hot air generator of FIG.

8 is a ceiling view of a portion of a burner body of the hot air generator of FIG.

[Explanation of symbols]

1 housing body 2 doors 3 operation part 4 table 5 Microwave irradiation part 6 Hot air outlet 7 Hot air outlet 8 exhaust pipe 100 hot air generator 101 Combustion blower 102 mixing blower 103 Combustion blower power supply 104 Mixer blower power supply 105 Igniter for ignition 106 spark plug 107 Gas equalizing valve 108 frame sensor 109 temperature sensor 110 Main controller 111 Wind pressure detection pipe 112 Gas mixing tube 113 Burner body 114 gas injection nozzle 115 Gas diffusion nozzle 116 straightening ring 117 Wind pressure detection output port 118 gas conduit 119 Heat induction tube

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F24C 7/02 541 F24C 7/02 541C 541R 551 551P H05B 6/64 H05B 6/64 A 6/68 310 6 / 68 310B 6/72 6/72 D 11/00 11/00 E (72) Inventor Toyomi Okada 1-7-20 Togoshi, Shinagawa-ku, Tokyo Taniko Co., Ltd. (72) Inventor Yutaka Yamada Minato-ku, Tokyo Kaigan 1-5-20 Tokyo Gas Co., Ltd. F-term within the company (reference) 3K086 AA10 BA01 BA08 BB02 CA02 CB04 CC07 CC20 CD11 DA02 3K090 AA06 AB02 BA01 BA09 BB01 DA01 EA01 EB21 EB27 3L086 AA04 AA20 BA02 BA05 BB08 BE02 BE13 DA07 DA08

Claims (5)

[Claims] 1. A heating device using high-temperature hot air, comprising: a housing main body having a wall portion defining a heating chamber in which a table for placing an object to be heated is arranged. A hot air outlet is provided on one of the opposite wall portions of the table, and a hot air outlet is provided on the other wall portion, and the hot air outlet is provided from the hot air outlet. The high-temperature hot air blown out is made to flow in one direction to the hot air discharge port while traversing an object to be heated placed on the table. 2. The heating device according to claim 1, wherein a microwave irradiation unit is provided on a wall portion of the wall portion located above the table. 3. The heating device according to claim 1, wherein the table is a removable turntable. 4. The hot air outlet is connected to an output conduit of a hot air generator, and the hot air outlet is connected to an exhaust conduit for discharging hot air to the outside.
Or the heating device according to 2 or 3. 5. The heating device according to claim 4, wherein the hot air generating device is capable of directly controlling the temperature and the air volume of the hot hot air generated in the output conduit.