JP2001304583A - Heating cooking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable simultaneous heating by using an electric heater and a catalyst heater, and heating cooking increased in a rise speed of a temperature, excellent in finishing, and improve handling properties and facility. SOLUTION: The heating cooking device comprises an electric heater 19 to heat a substance to be heated; and a catalyst combustion device 20 to feed gas from a gas cylinder 14, situated in a casing 1, through a gas flow rate regulating mechanism 18. Simultaneous heating is practicable by effecting heating by the electric heater 19 during heating cooking and through the generation of heat by reaction of a catalyst 23 of the catalyst combustion device 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for heating and cooking an object to be cooked by an electric heater, and more particularly to a heating and cooking apparatus to which heating by a catalytic combustion device is added.

[0002]

2. Description of the Related Art Conventionally, a cooking device provided with an electric heater generally comprises a cooking chamber for accommodating an object to be cooked and cooking by heating;
An upper heater provided on the ceiling of the cooking room as an electric heater,
Further, a lower heater provided at the bottom is provided. As such cooking by heating with an electric heater, for example, oven cooking in which hot air is convected by an upper heater or upper and lower heaters to heat the object to be cooked, or the strong heat of the upper heater is directly applied to the object to be cooked Grill cooking and so on are performed.

However, the capacity of an electric heater that can be used in ordinary households is about 1200 W, so that when cooking meat dishes and fried foods in an oven with a good finish, it is necessary to wait until the inside of the cooking chamber is heated to a predetermined temperature by preheating measures. Therefore, for example, when the heating temperature is set to 250 ° C., it takes about 30 minutes to start cooking. In addition, when cooking is started without preheating during oven cooking, the food is heated from a considerably low temperature and gradually heated to cook, so that the food becomes a so-called raw boiled state. In some cases, the water has dried up due to evaporation of water, resulting in poor cooking finish and lack of taste.

[0004] On the other hand, as a different heater from the above, recently, a so-called catalytic heater has been studied as a heating source of a cooking appliance such as a heating appliance or a heat retaining pot. The catalyst heater uses a reaction heat (catalyst heater) by supplying a combustible gas to the catalyst to cause a heating reaction. Therefore, in the heating cooking device using the electric heater described above,
If the calorific value of the catalyst heater is added to the calorific value, heating cooking (oven cooking) with strong heat can be performed, and good-quality cooking can be expected, and the above-described problem of electric capacity does not occur. .

[0005]

However, when the catalyst heater having the above-described structure is employed, a place where a gas supply source is provided and a gas pipe are required, which causes a problem in installation property and usability in ordinary households. Alternatively, in order to avoid this, it is conceivable to adopt a well-known portable spray gas cylinder for gas supply, but the gas capacity of this cylinder is 25%.
If it is used for cooking without heating at about 0 g, it will be consumed in about an hour or more, requiring frequent replacement of cylinders, which is troublesome and economically disadvantageous. There is a problem of inconvenience.
However, if you increase the capacity of the gas cylinder,
The handling property is deteriorated, and the safety problem in general households is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and accordingly, has as its object to provide a heating and cooking apparatus which enables simultaneous heating by an electric heater and heat generated by a catalytic reaction during cooking, and is easy to use. It is in.

[0007]

In order to achieve the above object, a heating cooking apparatus according to the present invention comprises a cooking chamber provided in a housing for accommodating an object to be cooked, and an electric heater for heating the object to be cooked. A gas cylinder provided in the housing, and a catalytic combustion device to which gas is supplied from the gas cylinder via a gas flow rate adjusting mechanism, wherein heat generated by the electric heater and cooking reaction of the catalytic combustion device during heating cooking. The present invention is characterized in that simultaneous heating by heat generation is enabled (the invention of claim 1).

According to such a configuration, when heating and cooking, simultaneous heating by the electric heater for heating the object to be cooked and the heat generated by the catalytic reaction of the catalytic combustion device, that is, the so-called catalytic heater, is possible. It is possible to carry out heating cooking at a high temperature under a rapid temperature rise which is hardly attainable by using only the above method, to shorten the cooking time, and to cause no problem of electric capacity at home.

According to the first aspect of the present invention, the simultaneous heating using the electric heater and the catalytic combustion device is performed at least at the beginning of the heating cooking (the invention of the second aspect).

According to such a configuration, simultaneous heating is performed at an early stage of the heating, so that the conventional problem that the heating was slow but the heating and cooking could not easily be performed can be solved, and the catalytic reaction can be prevented. Since the flammable gas to be used only needs to be used temporarily at the beginning of cooking, it can be used for a long time with a small spray-type gas cylinder. Therefore, a practical and easy-to-use heating cooking apparatus can be provided, for example, because it does not involve a complicated gas pipe and is not restricted by the installation location.

According to the first or second aspect of the present invention, the gas flow rate adjusting mechanism is configured to stop the gas supply on condition that the temperature in the cooking chamber reaches a predetermined temperature. ).

According to this configuration, the supply of the combustible gas used for the catalyst heater is cut off when the temperature in the cooking chamber reaches a predetermined temperature, so that the gas can be effectively used and the thermal energy is wasted. Can be easily cooked by using a temperature control by an electric heater.

According to the first aspect of the present invention, the electric heater is shared with a heater for heating the catalyst of the catalytic combustion device (the invention of a fourth aspect).

According to such a configuration, a separate heater for heating the catalyst to the activation temperature is not required, and the configuration can be simplified, and the electric heater functions for heating the object to be cooked. The heat energy can be utilized without waste. In addition, the temperature of the catalyst can be increased over a wide range by an electric heater, which is advantageous in extending the life (durability) of the catalyst.

According to the first aspect of the present invention, the catalytic combustion device is provided on an outer surface of a peripheral wall constituting a cooking chamber, and the peripheral wall corresponding to at least the catalyst portion of the catalytic combustion device is formed of an infrared-permeable member. (Invention of claim 5).

According to such a configuration, the infrared rays generated by heating the catalyst and raising the temperature have a large thermal effect, and can efficiently radiate the infrared rays to the object to be cooked in the cooking chamber, which is more efficient. Cooking can be expected.

According to the first aspect of the present invention, the high temperature gas after the reaction in the catalytic combustion device passes through the cooking chamber and is then discharged to the outside of the housing.
Invention).

According to such a configuration, the gas supplied by mixing the air heats the catalyst and contributes to the heating of the object to be cooked by the reaction heat, and then is discharged out of the housing as combustion gas. Since the heat quantity is still sufficiently stored, once the high-temperature gas is passed through the cooking chamber, the generated heat quantity can be effectively used without wasting.

According to the first aspect of the present invention, the gas cylinder is detachably connected to the gas flow control mechanism (the seventh aspect of the present invention).

According to such a configuration, the gas supply amount can be adjusted by installing a spray type gas cylinder, so that a widely used portable gas cylinder can be used, which is convenient for practical use.

According to the first aspect of the present invention, there is provided a catalytic combustion apparatus in which a catalyst is accommodated in a tubular case, and heat generated from the catalyst is used for heating and cooking an object to be cooked through the tubular case. (Invention of claim 8).

According to such a configuration, since the tubular case is used, the entire outer peripheral surface thereof can be used as a heat radiating surface, so that the size can be reduced, which is advantageous even when the case is provided inside or outside the cooking chamber. In addition, it is easy to provide a radiation fin as needed to increase the radiation area.

According to an eighth aspect of the present invention, the cooking chamber is provided with a blower for circulating room air, and a tubular case is installed in the circulation air passage (the invention of the ninth aspect). .

According to such a configuration, since the reaction heat of the catalyst is heated and circulated in the cooking chamber, the unevenness can be promptly heated for heating the object to be cooked regardless of the position where the catalytic combustion device is provided. Can be supplied without.

[0025] According to the first aspect of the present invention, the gas cylinder is installed in an air passage of a cooling fan that is provided in the housing and cools electrical components.

According to such a configuration, a rise in the temperature of the gas cylinder together with the electrical components can be suppressed, so that a cooking device with even more excellent safety can be provided.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) Hereinafter, a first embodiment of a heating and cooking apparatus according to the present invention will be described with reference to FIGS. First, FIG. 2 is an external perspective view showing an entire configuration of the heating cooking device in an open state, and a cooking chamber 2 for accommodating an object to be cooked (not shown) is formed in a box-shaped housing 1 having an open front. A rotatable rotating plate 3 is provided in the lower part of the cooking chamber 2 as a fixture to be used in accordance with various cooking menus, a shelf support 4 provided in a plurality of stages on left and right side walls 2a of the peripheral wall, Further, a square plate 5 placed and supported on the shelf support 4 is accommodated and arranged.

An openable and closable door 6 is provided in front of the cooking chamber 2, and an operation panel having a display section 7, various cooking menu keys 8, a start key 9, and the like is provided on the front side of the side (right side in the figure). 10 is provided. Further, a rotatable opening / closing lid 11 is provided, for example, at a lower rear portion of the right side wall 1a of the housing 1, and a gas cylinder 14 to be described later is mounted in the housing 1 with the opening / closing lid 11 opened. It is configured so that it can be detachably stored in. The left side wall 2 of the cooking chamber 2
A discharge port 2c is provided at the upper part of the housing 1a, and communicates with the outside of the housing 1 via an exhaust duct (not shown).

FIG. 1 is a cutaway side view of the right side wall 1a of the housing 1 on which the opening / closing lid 11 is provided. 1 shows a schematic configuration of a machine room 12 formed between an outer surface of a right side wall 2 a and an inner surface of a right side wall 1 a of the housing 1. On the back side of the operation panel 10 of the machine room 12, a plurality of door switches and the like (not shown) that respond to opening and closing of the door 6 are included as electrical components, and cooking is performed based on the various operation keys 8 and 9 described above. The control device 13 which performs the operation control of is provided.

In the lower part of the machine room 12, the above-mentioned gas cylinder 14 is elastically clamped and fixed to a snap-type fixing member 15 which is detachable from the outside of the housing 1. The product controller 13 is:
It is located downstream of a cooling fan 16 provided at the rear of the machine room 12 and receives a cooling action.
The rear wall 1b shows an intake port 1d, and the bottom wall 1c shows a part of an exhaust port 1e. The nozzle 17 of the gas cylinder 14 is detachably fitted to the gas flow rate adjusting mechanism 18 and connected in a hermetically sealed state, and the gas flow rate adjusting mechanism 18 is controlled by the control device 13 as described later to supply gas. It is being adjusted.

On the other hand, a catalytic combustion device 20 having an electric heater 19 is provided on the outer surface of the upper wall 2 b of the cooking chamber 2 connected to the machine room 12. The led-out gas supply pipe 21 is connected for communication. Hereinafter, to describe these specific configurations, first, the configuration of the catalytic combustion device 20 will be described with reference to an external perspective view of FIG. 3 and a longitudinal sectional view of FIG. The outer shell of the catalytic combustion device 20 has a case 22 made of a metal, for example, an aluminum die-cast and formed in a substantially closed container shape.
A gas supply port 22a is formed at one end, and an exhaust gas port 22b communicating with the inside is formed at the back side of the other end. However, the case 22 is closely attached to the outer surface of the upper wall 2b of the cooking chamber 2, and the exhaust gas port 22b communicates with the inside of the cooking chamber 2.

The electric heater 1 made of the above-described sheath heater, for example, is provided inside the case 22.
9, a catalyst 23 housed so as to cover the periphery of the electric heater 19, and a gas diffuser 24 made of ceramics or the like, which is a gas-permeable porous body and arranged at one end of the gas supply port 22a. The catalytic combustion device 20 according to this embodiment is provided, and the gas supply pipe 22 is connected to a gas supply port 22a of the catalytic combustion device 20. In particular, the electric heater 19 in the present embodiment
Is embedded in the lower surface of the catalyst 23 so as to form a concave portion 23a, and the heat generated by heating the object to be cooked through the upper wall 2b of the cooking chamber 2 and activating the catalyst 23 at an activation temperature (for example, 250 ° C.). It can be shared with the case of heating up to.

The gas flow rate adjusting mechanism 18 is
An electromagnetic gas flow control valve 25 shown in FIG. 5 is provided.
The suction pipe 25a of the regulating valve 25 is connected to the nozzle 17 of the gas cylinder 14, and the suction pipe 25a is connected to the discharge pipe 2a.
The gas supply and stop are performed by opening and closing the pipe 25c between the valve body 5b and the valve body 26 by the vertical movement of the valve body 26. As shown in the figure, the control method of the gas flow control valve 25 is performed by a catalyst temperature sensor 27 using a thermosensitive element such as a thermocouple attached to the catalyst 23 of the catalytic combustion device 20.
Temperature sensor 2 that is controlled to open and close based on the control device 13 that has detected the temperature of the cooking chamber 2 and that has input the detection signal, and additionally detects the temperature in the cooking chamber 2 (also referred to as the inside temperature).
8 is provided, and the control device 13
The opening and closing of the gas flow control valve 25 is controlled based on the input signal from the controller 8.

Therefore, in the case of the present embodiment, the gas flow rate regulating valve 25 is controlled by the control device 13 when the temperature of the catalyst 23 reaches, for example, 250 ° C. or more of the catalyst activation temperature, as will be described later in detail in the operation description. The gas is supplied under the open control of. Then, the opening time is set in response to the in-compartment temperature sensor 28 that detects the temperature in the cooking chamber 2, and the gas supply is adjusted. In this case, the gas flow adjusting mechanism 1
8 does not need to continuously adjust the flow rate as in a normal gas stove, and can be adjusted by intermittent opening and closing by the adjusting valve 25. This is because the catalyst 23 has already been warmed and the reaction has started, so that even if the gas supply is temporarily cut off, the catalyst 23 does not immediately cool below the activation temperature. The gas supply can be adjusted based on the control.

Further, the control device 13 controls the temperature of the electric heater 19 based on the input signal from the internal temperature sensor 28, and in particular, maintains an appropriate cooking temperature by the electric heater 19 alone to obtain a good finish. It is programmed to perform cooking. In addition, the catalyst 23 generally has heat resistance. However, even at a temperature lower than the melting point, for example, when the temperature exceeds 800 ° C., a sintering phenomenon occurs, and the activity may be lost. The opening and closing of the gas flow control valve 25 is controlled based on the catalyst temperature sensor 27 so that it can be performed.

In this embodiment, a gas / air mixing device 29 as shown in FIG. 6 is provided on the discharge pipe 25b side of the gas flow control valve 25, and the gas supply pipe 21 Are connected. This mixing device 29
A well-known Bunsen-type air suction method is adopted, which can adjust the amount of air to be mixed (indicated by arrow Y) in response to the gas flow rate (indicated by arrow X in the figure) and provides a simple configuration. it can. Thus, the mixed gas with the combustible gas is supplied to the catalytic combustion device 20, but is simply referred to as a gas hereinafter for the sake of simplicity.

FIGS. 7 to 10 are for explaining the operation of the present embodiment, which will be described later. FIG. 7 is a flowchart of the initial stage of cooking by the heating cooking apparatus, and FIG. Accompanying power supply and catalytic combustion device 20
FIG. 9 and FIG. 10 show different temperature characteristics based on the heating action of the electric heater 19 and the catalytic combustion device 20.

The operation of the heating and cooking apparatus of the present embodiment configured as described above will be described with reference to the flowchart of FIG. In the case of performing heating cooking (oven cooking), which preferably starts cooking in the cooking chamber 2 at a high temperature, an object to be cooked (not shown) is placed on a square plate 5 and placed along a desired shelf support 4. And housed in the cooking room 2. Then, by selecting the cooking menu key 8 on the operation panel 10 and operating the start key 9, heating is started as shown in the flowchart of FIG.

That is, electric power is supplied to the electric heater 19 (see FIG. 8), and with this heat generation, the object to be cooked on the square plate 5 is heated through the upper wall 2b of the cooking chamber 2 and cooking is started. The catalytic heater 20 is also heated by the electric heater 19. Then, when a part of the catalyst 23 near the first surrounding the electric heater 19 is heated for several minutes, the activation temperature becomes 250.
° C (YES).

Then, the temperature of the catalyst 23 is detected by the catalyst temperature sensor 27 as disclosed in FIG.
8 is operated. Therefore, the valve element 2 of the gas flow control valve 25
6 rises to open the conduit 25 c, so that the gas from the nozzle 17 of the gas cylinder 14 flows in the direction of the arrow in the figure, and the suction pipe 25 a and the discharge pipe 2 of the gas flow control valve 25.
5b. Further, air (indicated by an arrow Y) is taken in by an air mixing device 29 shown in FIG. 6, and gas is supplied to a catalytic combustion device 20 through a gas supply pipe 21 shown in FIG. You.

Here, since at least a part of the catalyst 23 has already reached the activation temperature (250 ° C.), the gas is ignited, and the catalytic reaction is promoted by the heating effect of the combustion. In this case, the gas from the gas supply port 22a is diffused and supplied over a wide range by the gas diffuser 24, and burns on the catalyst 23, so that the entire catalyst 23 quickly reaches the activation temperature and heats the inside of the cooking chamber 2. Sufficient heat of reaction is generated. As the gas burns, the catalyst 23
Is raised, the rapid temperature rise is detected by the catalyst temperature sensor 27 to confirm ignition (YES).

At this time, the burned high-temperature gas is
After being discharged from the cooking chamber 2 into the cooking chamber 2, it is discharged from the housing 1 through an exhaust duct (not shown) from an outlet 2 c (see FIG. 2) formed in the left side wall 2 a of the cooking chamber 2. Since the gas flows into the cooking chamber 2 at a relatively high temperature, it is effective to maintain the inside of the cooking chamber 2 at a high temperature without wasting heat. The components of this gas contain little carbon dioxide (CO2) and have no problem.

Then, the ignition of the gas was confirmed (YE
After S), the gas is continuously supplied and acts as a so-called catalyst heater using the reaction heat of the catalyst 23. And now,
When the temperature in the cooking chamber 2 for heating and cooking is set to, for example, 230 ° C., both electric power and gas are continuously supplied as shown in FIG. Simultaneous heating by the catalyst heater is executed, and in this case, the temperature reaches the predetermined temperature of 230 ° C. in a short time of about 5 minutes. Therefore, the temperature inside the cooking chamber 2 (the temperature inside the cooking chamber) is detected by the temperature sensor inside the cooking chamber 2 shown in FIG. 5, and the control device 13 which has input the output signal operates the gas flow rate adjusting mechanism 18 to supply the combustible gas. To stop.
That is, the valve body 26 of the gas flow control valve 25 moves down to
5c is closed.

As described above, in the flowchart of FIG. 7, when the internal temperature reaches the predetermined temperature (YES), the gas supply is stopped as described above, and the heating of the catalyst 23 by the reaction heat (catalyst heater) is stopped. The heating cooking by the heat generated only by the electric heater 19 is continued, and the cooking target is cooked under the temperature control according to the cooking menu based on the in-chamber temperature sensor 28.

On the other hand, at the same time as the heating and cooking is started as described above, the cooling fan 16 provided in the machine room 12 is also driven to rotate, and the air sucked in from the air inlet 1d on the rear wall is blown downwind by a blast passage. After being sprayed and cooled to the control device 13 and the gas cylinder 14 located therein, the gas is discharged to the outside from the exhaust port 1e of the bottom wall 1c. Therefore, the control device 13 serving as the electrical component
In this case, the reliability of the electronic parts and the like of the gas cylinder 14 against heat is ensured, and the safety accompanying the cooling of the gas cylinder 14 is ensured.

As described above, according to the present embodiment, in the initial stage of the heating and cooking, the simultaneous heating combining the heat generated by the electric heater 19 and the heat generated by the catalyst 23 reaction of the catalytic combustion device 20, that is, the so-called catalyst heater. Is performed, the temperature in the refrigerator rises quickly, so that not only the pre-operation of preheating the cooking chamber 2 and unnecessary waiting time especially when heating and cooking due to a high temperature can be eliminated, but also the finished product can be finished well. Since it can be cooked in a short time, it is possible to prevent the fresh boiled water and the excessive evaporation of water from deteriorating the taste.

FIG. 9 shows the actual measurement results of the time and the temperature characteristics. For example, when the temperature in the cooking chamber 2 required for heating cooking is set to 230 ° C., the time until the temperature reaches the set temperature is obtained. Can be understood that the simultaneous heating (indicated by the solid line) by the combined use of the electric heater 19 and the catalytic heater of the catalytic combustion device 20 starts in 5 or 6 minutes and shows stable temperature characteristics in at least about 10 minutes. . On the other hand, it can be understood that the temperature rise characteristic indicated only by heating the electric heater 19 of, for example, 1200 W, which is indicated by a broken line, corresponds to a so-called conventional example, and the actual measurement result requires about twice as long as 20 minutes or more.

In FIG. 10, the arrival time at various set temperatures is actually measured. The temperature characteristic up to 230 ° C. (in this case, the arrival time) is shown in FIG. In particular, from FIG. 10, as the set temperature becomes higher, the arrival time greatly varies, and in other words, as the set temperature becomes higher, the temperature rise due to simultaneous heating increases. In addition to being fast, the time reduction becomes more remarkable, and also the effect of finishing the object to be cooked is large, and heating cooking (oven cooking) can be performed very efficiently.

Incidentally, the amount of gas used in the present embodiment will be described. The calorific value of liquefied petroleum gas used in the spray type gas cylinder 14 is generally 102.5K.
J / L (gas). Assuming that the content of the gas cylinder 14 is, for example, 250 g (liquid) = 97 L (gas),
The single cylinder 14 can emit about 9900 KJ of heat. Since the electric heater 14 used for heating and cooking is 1200 W as described above, the catalyst 23
When the calorific value due to the reaction is set to 1200 W, which is the same, the heating and cooking accompanying the gas supply for about 138 minutes can be performed in the entire gas cylinder 14.

Therefore, as described above, the set temperature is set to 230
8C to 10C (simultaneous heating)
Since the set temperature can be reached by supplying the gas for about 5 minutes as shown in (2), it is possible to perform cooking for 27 times or more as the number of times of high-temperature cooking. In view of the frequency of use in ordinary households, it can be assumed that one gas cylinder 14 can be used for a relatively long time, and the cylinder 14 needs to be replaced only once every few months. By the way, in the case where the gas is burned using only the gas in the gas cylinder 14 and heating cooking (oven cooking) is performed, it is considered that one heating cooking takes about 30 minutes. , The frequency of replacement of the cylinder 14 is high, the usability is inferior, and it is unavoidable that it becomes economically disadvantageous.

However, in this embodiment, since a portable spray type gas cylinder 14 can be used, gas supply source equipment and troublesome gas piping are not required, and the usability is particularly impaired without having to worry about the installation location. Absent. When the gas cylinder 14 is replaced, the gas cylinder 14 located in the machine room 12 can be easily attached and detached by opening the opening / closing lid 11 provided on the right side wall 1a of the housing 1. Nozzle 1 of cylinder 14 by attachment
7 is connected to the gas flow rate adjusting mechanism 18 in a closed state, so that the handleability is also good in this respect and it is suitable for household use.

A cooling fan 16 is provided in the machine room 12 in which the gas cylinder 14 is disposed and in which the control device 14 containing heat-generating electronic components and the like is provided. Therefore, these gas cylinders 14
The control device 13 is cooled as needed, and the reliability and safety thereof are not threatened by thermal effects. Furthermore,
In the present embodiment, the electric heater 19 heats the catalyst 23 for activating the catalytic combustion device 20 and is commonly used as a heating source for cooking an object to be cooked in the cooking chamber 2. In addition, the electric heater 19 can be effectively used from beginning to end, a smooth heating action can be continued, and heating and cooking can be efficiently performed. In addition, since the catalyst 23 is housed and protected in the robust metal case 22, the catalyst 23 can be formed of a brittle porous body such as ceramics, and the material choice is wide. It is also advantageous in that a desired material can be used.

The high-temperature gas from the catalytic combustion device 20 is discharged from the exhaust port 22b of the case 22 into the cooking chamber 2 and then discharged outside the housing 1 to effectively use the generated heat. As described above, it is assumed that gas and oily components generated from the food are
It is also conceivable that the gas flows back into the fuel cell 2 and adheres to and contaminates the catalyst 23 to reduce the performance of the catalyst 23. However, in this embodiment, since the electric heater 19 is embedded in the catalyst 23,
Even if oily components adhere to the catalyst 23, the electric heater 1
9 is burned out by heating, so that the life of the catalyst 23 can be extended without deteriorating its performance.

In the above configuration, in the catalytic combustion device 20, the electric heater 19 is provided so as to be buried in the concave portion 23a of the catalyst 23. However, the present invention is not limited to this. Alternatively, a catalyst shape in which a portion where the electric heater 19 is accommodated may be cut out may be used. In addition, the heat generation due to the reaction of the catalytic combustion device 20, that is, the simultaneous heating of the so-called catalyst heater and the electric heater 19 is performed in the early stage of the start of cooking to improve the rise in temperature. For example, the present invention can be applied to a case where strong heating is required temporarily, for example, in the middle or immediately before the end, and it is expected that the processing range of the cooking menu can be expanded. In addition, for example, a heat shield plate or the like (not shown) is provided on the upper outer surface of the catalytic combustion device 20 having the electric heater 19 shared with the heating and cooking so that heat does not escape to the housing 1 near the upper side. Various changes can be made in implementation, such as the configuration.

11 to 16 show the second to sixth embodiments of the present invention in contrast to the first embodiment described above.
The same portions as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different portions will be described.

(Second Embodiment) FIG. 11 is a view corresponding to FIG. 4 showing a second embodiment of the present invention. The specific configuration differs. That is, as shown in FIG. 11, a configuration having an infrared transmitting portion 32 which is located at least in a range corresponding to the catalyst 23 on the lower surface side of the hollow container-shaped case 31 and incorporates heat resistant glass of an infrared transmitting member. I did it. The cooking chamber 33 in which the catalytic combustion device 30 having such a configuration is mounted is provided on the upper wall 33a thereof with the infrared transmitting portion 32.
(A large number of opening groups are also possible). A gas supply port 31a is integrally provided at one end of the case 31, and an exhaust gas port 31b is provided at the other end.
Are the same as those in the first embodiment.

Thus, also in this embodiment, as in the first embodiment, in the early stage of the heating start, the heat generated by the reaction of the catalyst 23 of the catalytic combustion device 30 (catalyst heater) and the heat generated by the electric heater 19 are reduced. , The temperature rise in the cooking chamber 33 is accelerated, and the heating and cooking of the object to be cooked can be completed in a short time and the finish is good. And
In particular, in the present embodiment, since the lower surface of the case 31 containing the catalyst 23 is the infrared transmitting portion 32, infrared rays generated as the catalyst 23 is heated and the temperature rises can be radiated to the cooking object. Efficient heating cooking is possible.

(Third Embodiment) FIGS. 12 and 13
FIG. 14 shows a third embodiment of the present invention, in which the catalytic combustion device 35 is particularly different from the first embodiment. First, FIG. 12 is an external perspective view showing the configuration of the catalytic combustion device 35 alone, and the case 36 has a metal tubular shape.
A plurality of annular heat radiation fins 37 are integrally provided on the outer surface. A catalyst 38 is accommodated in the case 36 and a heater (not shown) for heating the catalyst 38 is provided.

Accordingly, a gas containing a mixture of air is supplied from the direction indicated by arrow A in the figure, burns on the activated catalyst 38 heated by a heater (not shown), and the high-temperature gas is discharged in the direction of arrow B. You. Further, the heat of reaction of the catalyst 38 is effectively released from the outer surface of the case 36, particularly from the radiation fins 37. As a so-called catalytic heater by the catalytic combustion device 35 having such a configuration, radiant heat from the case 36 and mainly the radiating fins 37 is used for heating the object to be cooked in the direction of the arrow C, or by using air blowing. A heating method such as application to heating cooking after hot weathering is possible.

FIG. 13 is a diagram corresponding to FIG. 1 showing an example in which the latter one of the above-mentioned heating methods for hot weathering is adopted, and in particular, the cooking chamber 39 is shown in a partially broken configuration. That is, the various components in the machine room 12 and the arrangement configuration thereof are the same as in the first embodiment. However, in the cooking chamber 39 in this embodiment, the electric heater 19 is independently provided in close contact with the outer surface of the upper wall 39a, while the circulation blower 40 is provided in the inner rear wall 39b. ing.

The blower 40 includes a motor 41 and a centrifugal fan 42. When the blower 40 is driven to rotate, the air in the cooking chamber 39 is displaced in the direction of the arrow in FIG.
The air is blown from the outer peripheral side of 2, and is sucked in such a way as to return in the front and return to the center side, and a so-called circulating air path is formed again by the centrifugal fan 42 to be circulated and blown. And
The tubular case 36 of the catalytic combustion device 35 is disposed above the back of the cooking chamber 39 in the circulation air passage, and the gas supply pipe 21 is connected to the tubular case 36.

Thus, also in the present embodiment, simultaneous heating by the electric heater 19 and the so-called catalyst heater of the combustion catalyst device 35 becomes possible. In this case, the blowing from the blowing device 40 causes the tubular case in which the catalyst 38 is sealed. It flows in a direction orthogonal to 36 and promotes the heat radiation action from the heat radiation fins 37, and as a result, is heated and circulated in the cooking chamber 39. Therefore, in the early stage of heating, the object to be cooked is heated by the hot air circulation of the catalyst heater together with the electric heater 19, so that the temperature rise can be made faster and the heating cooking suitable for high-temperature cooking can be executed with a good finish.

(Fourth Embodiment) FIG. 14 is a view corresponding to FIG. 2 showing a fourth embodiment of the present invention. This embodiment is substantially the same as the first embodiment except that the gas cylinder 14 is detachable from the front of the housing 1. That is, the operation panel 41 has a cooking menu key 42 and a start key 43 arranged above, and an opening / closing lid 44 provided rotatably below the cooking menu key 42 and the start key 43.

Therefore, when the gas cylinder 14 is inserted with the nozzle 17 at the head as shown by a two-dot chain line with the opening / closing lid 44 opened, the gas cylinder 14 is detachably fixed to an internal machine chamber (not shown), It is configured to be fitted and connected to the flow rate adjusting mechanism in a closed state. In this way, since the gas cylinder 14 can be replaced in front of the housing 1, even if there is no space on the side of the cooking device as compared with the first embodiment, the replacement can be easily performed, and the installation can be performed accordingly. The handling is improved without being restricted by the place.

(Fifth and Sixth Embodiments) FIGS. 15 and 16 are diagrams corresponding to FIG. 4 showing the fifth and sixth embodiments of the present invention, respectively. The ignition system for the combustible gas supplied to the catalytic combustion devices 45 and 52 is different.

First, in the fifth embodiment shown in FIG. 15, although not shown, a magnetron is provided in a machine room, and microwaves are applied to the inside of the cooking chamber 49 so that the object to be cooked can be cooked. It is in a cooking device having a microwave oven function.
An opening 50 is formed in an upper wall 49a of the cooking chamber 49, and a catalytic combustion device 45 is provided on an outer surface thereof. In the catalytic combustion device 45, the gas diffuser 46 is formed of a porous material that generates heat by microwaves, for example, silicon carbide. Therefore, the lower surface of the case 47 that accommodates the diffuser 46 has at least the gas diffuser 46. The microwave transmitting portion 48 is formed so that a wave can be irradiated.

According to such a configuration, the microwave is temporarily irradiated at the start of heating to heat the gas diffuser 46 and to heat the supplied combustible gas and the nearby catalyst 23 to start the reaction. Can be. And the catalyst 23
When the whole rises sufficiently to the activation temperature and acts as a catalyst heater similarly to the above, the transmission of the microwave is stopped, the electric heater 19 is energized and generates heat, and simultaneous heating with the catalyst heater is performed. Is done. Therefore, the temperature rise in the cooking chamber 49 rises quickly, and the desired high-temperature cooking is efficiently performed.

Incidentally, the electric heater 19 in this embodiment is used.
In the present embodiment, the heating of the catalyst 23 and the heating of the object to be cooked can be shared as in the first embodiment, but in this embodiment, the microwave function of the cooking device is effectively used for other purposes. For this reason, the electric heater 19 may be provided separately from the catalytic combustion device 45 only for heating the object to be cooked. In addition, if the catalyst 23 carrier itself is formed of a member that generates heat by microwaves, it is possible to simultaneously heat a wide range to speed up the reaction of the entire catalyst 23. Further, when it is difficult to simultaneously supply current (simultaneous heating) to the magnetron and the electric heater 19 in the initial stage of heating due to the electric capacity, for example, the electric heater 19 is not used until the catalyst 23 reacts.
The power may be controlled by reducing the output of the power supply sufficiently or by cutting off the power supply.

On the other hand, in the sixth embodiment shown in FIG.
This is different from the first embodiment in that a igniter 51 for igniting the combustible gas by high-pressure discharge is added in a case 53, and the other components have a common configuration. Therefore, at the start of heating, the combustible gas supplied by the igniter 51 is ignited and burns to heat the catalyst 23,
Since the catalyst 23 also receives the heating action from the electric heater 19, the catalyst 23 reaches the activation temperature in a short time, and the exothermic action due to the catalytic reaction starts quickly, so that the heating as the catalyst heater and the electric heater 19 are performed. , The temperature in the cooking chamber 2 rises quickly, and efficient and excellent heating cooking can be performed.

However, in the present embodiment, in the case where the heating is continued for the second time, if the temperature of the catalyst 23 is maintained at the activation temperature of, for example, 250 ° C., the igniter 51
The above-described simultaneous heating by the reaction heat of the catalyst 23 can be immediately executed without operating the. Such control can be easily performed by monitoring the temperature of the catalyst 23. For example, it is possible to use the catalyst temperature sensor 27 disclosed in FIG. 5 of the first embodiment.

In each of the above embodiments of the present invention, the electric heater and the catalytic combustion device are provided on the outer peripheral surface of the upper wall among the peripheral walls of the cooking chamber. However, the present invention is not limited to this, and may be provided on the side wall or the rear wall.
Further, when the electric heater does not double as heating of the catalyst, they may be separately provided on desired peripheral walls.
In addition, since the catalyst is configured to be housed in a robust metal case, there is no particular problem if the catalyst is made of a porous material such as ceramics. In a brittle material such as that described above, the larger the area of the material, the larger the area, the more easily stress is applied, and there is a concern about durability such as early destruction of the catalyst. Therefore, in such a case, the catalyst is prevented from being broken by forming the material of the catalyst on a fibrous body such as a ceramic fiber, a glass fiber wash-coated with alumina, or a ceramic paper having flexibility. For example, the present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the gist of the present invention.

[0072]

As described above, the present invention enables simultaneous heating by an electric heater for heating an object to be cooked and heating based on the catalytic reaction of a catalytic combustion device, that is, a so-called catalytic heater, when cooking by heating. Thereby, high-temperature cooking can be quickly performed under a rapid temperature rise that is difficult to obtain with an electric heater alone, and thus desired cooking can be performed in a short time, and the problem of electric capacity in ordinary households can be avoided. .

In particular, when the above-described simultaneous heating is employed in the early stage of the start of heating, it is possible to solve the problems that conventionally, the rise of the temperature is slow, so that a wasteful preheating time is required, and that the cooking cannot be easily performed. In addition, the combustible gas used for the catalytic reaction only needs to be used temporarily temporarily at the beginning of cooking, so that it can be used for a long time even in a small spray-type gas cylinder, and the safety and handleability in ordinary households is good, and A practical and easy-to-use heating and cooking device can be provided, for example, without being restricted by the installation location without the gas supply source equipment and troublesome gas piping.

[Brief description of the drawings]

FIG. 1 is a side view of a cooking device according to a first embodiment of the present invention, in which a side wall is cut off.

FIG. 2 is an external perspective view showing the entire configuration in an open state.

FIG. 3 is an external perspective view showing a catalytic combustion device.

FIG. 4 is a longitudinal sectional view of a main part.

FIG. 5 is an explanatory diagram related to a gas flow rate adjusting mechanism.

FIG. 6 is a longitudinal sectional view showing a mixing device.

FIG. 7 is a flowchart at the beginning of heating.

FIG. 8 is an explanatory diagram showing supply states of gas and electric power.

FIG. 9 is a temperature characteristic diagram with respect to time.

FIG. 10 is a characteristic diagram of set temperature and arrival time.

FIG. 11 is a view corresponding to FIG. 4, showing a second embodiment of the present invention;

FIG. 12 is an external perspective view of a catalytic combustion device showing a third embodiment of the present invention.

FIG. 13 is a diagram corresponding to FIG. 1;

FIG. 14 is a view corresponding to FIG. 2, showing a fourth embodiment of the present invention;

FIG. 15 is a view corresponding to FIG. 4, showing a fifth embodiment of the present invention.

FIG. 16 is a view corresponding to FIG. 4, showing a sixth embodiment of the present invention.

[Explanation of symbols]

1 is a housing, 2 is a cooking room, 6 is a door, 10 is an operation panel, 1
Reference numerals 1 and 44 denote an open / close lid, 12 a machine room, 13 a control device, 1
4 is a gas cylinder, 16 is a cooling fan, 17 is a nozzle,
8 is a gas flow control mechanism, 19 is an electric heater, 20, 3
0, 35, 45, and 52 are catalytic combustion devices, 21 is a gas supply pipe, 22, 31, 36, 47, and 53 are cases, and 22b,
31b is an exhaust gas outlet, 23 and 38 are catalysts, 24 and 46 are gas diffusers, 25 is a gas flow control valve, 32 is an infrared transmitting part (infrared transmitting member), 48 is a microwave transmitting part, and 51 is an igniter. Show.

Claims (10)

[Claims] 1. A cooking chamber provided in a housing for storing an object to be cooked, an electric heater for heating the object to be cooked, a gas cylinder provided in the housing, and a gas flow adjusting mechanism from the gas cylinder via a gas flow rate adjusting mechanism. A catalytic combustion device to which gas is supplied by heating, wherein simultaneous heating by heat generated by the electric heater and heat generated by a catalytic reaction of the catalytic combustion device is enabled during heating and cooking. 2. The heating and cooking apparatus according to claim 1, wherein the simultaneous heating using the electric heater and the catalytic combustion device is performed at least at the beginning of heating and cooking. 3. The heating and cooking apparatus according to claim 1, wherein the gas flow control mechanism stops the gas supply on condition that the inside of the cooking chamber reaches a predetermined temperature. 4. The heating and cooking apparatus according to claim 1, wherein the electric heater is used in common with a heater for heating the catalyst of the catalytic combustion device. 5. The catalytic combustion device is provided on an outer surface of a peripheral wall constituting a cooking chamber, and the peripheral wall corresponding to at least a catalyst portion of the catalytic combustion device is constituted by an infrared-permeable member. The cooking device according to claim 1. 6. The hot gas after the reaction in the catalytic combustion device is:
2. The cooking device according to claim 1, wherein the cooking device is discharged outside the housing after passing through the cooking chamber. 7. The cooking device according to claim 1, wherein the gas cylinder is detachably connected to the gas flow rate adjusting mechanism. 8. The catalytic combustion device is characterized in that a catalyst is accommodated in a tubular case and heat generated from the catalyst is used for heating and cooking an object to be cooked through the tubular case. The cooking device according to claim 1, wherein 9. The cooking device according to claim 8, wherein the cooking chamber is provided with a blower for circulating room air, and a tubular case is provided in the circulation air passage. 10. The heating and cooking apparatus according to claim 1, wherein the gas cylinder is provided in an air passage of a cooling fan provided in the housing and cooling electric components.