JPH11351582A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save energy and prevent heating power of heating means from being reduced by utilizing preheating temperature in a heating chamber as heating of a smoke cleaner in a heating cooker. SOLUTION: One side wall surface of a heating chamber 20 is employed also as part of a smoke cleaner 42, whereby temperature in the heating chamber 20 to be preheated is thermally transmitted to a thermally purified catalyst 48 in the smoke cleaner 42 and is kept at smoke purifying/activating temperature. As a result, a purification characteristic is improved, and liberation of heat from the heating chamber 20 is reduced owing to a position of an exhaust/ air intake port being higher than an exhaust port to save energy and restrict high heating power of heating means 30, 31 of the heating chamber 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device provided with microwaves and electric heating means.

[0002]

2. Description of the Related Art In an oven or a microwave oven with a grill belonging to a high-frequency heating apparatus with an electric heating device, the functions of the microwave oven with the added value have been promoted, and the function of the electric heating device has been enhanced. I have. Increasing the heating power of the electric heating device while increasing the functions in this way means that the number of parts increases, the structure inside the device becomes complicated, and the problem of whether or not some other function or performance is sacrificed occurs. come. For example, there is a contradictory problem that if the cooling of parts is emphasized, it is not possible to increase the thermal power. In particular, in an oven or a grill range where the temperature of the heating chamber is high, oily smoke, odor and the like are easily generated, and the purification device requires a large purification area and a large thermal power for operating the device. High value-added and thermal power are important issues.
The selection of the overall basic design concept and concept at that time is an important factor. In order to solve this problem, a means for purifying or removing oil smoke and the like described below has been used.

Conventionally, as shown in FIGS. 5 and 6, this type of heating cooker is provided with an exhaust air inlet 2 on an upper side wall surface of a heating chamber 1, and the exhaust air inlet 2 is configured in a chimney or duct shape. The exhaust passage 3 is connected to an exhaust purifier 4, an exhaust fan 5, and a motor 6 downstream of the exhaust passage 3. The exhaust passage 3 communicates with an exhaust port 8 provided in an exterior 7, and the upper wall surface of the heating chamber 1 Configured apart. On the other hand, heating means 9 are provided on upper and lower outer walls of the heating chamber 1.
10 is provided, and a microwave radiated from a magnetron 11 is radiated via a waveguide 12 from a power supply port 13 provided in an upper inner wall of the heating chamber 1. Numeral 14 denotes a foodstuff, which is mounted on a turntable 17 or a rotating net mounted on a drive shaft 16 connected to a drive motor 15, and rotates. Reference numeral 18 denotes an openable and closable door, and 19 denotes an operation panel of the heating device.

In the above configuration, in order to operate the heating cooker, if a predetermined setting is made on the operation panel 19, the heating chamber 1
The inside of the food 14 is irradiated with microwaves from the power supply port 13 and heated from the skin and the inner surface, and the electric heating means 9 and 10 heat the upper and lower wall surfaces of the heating chamber 1 to a high temperature. More heating, food 1 by both actions
At this time, steam, odor, oily smoke, etc. are generated from the foodstuffs 14 depending on the cooking conditions during the heating process. These products are sucked by the exhaust fan 5, processed by the exhaust filter 4, and discharged to the outside 7 from the exhaust port 8.

[0005]

However, in the above-mentioned conventional configuration, the exhaust gas purifier 4 has no particular heating means.
Further, since the heating chamber 1 is arranged at a distance from the wall surface of the heating chamber 1, the heat of the heating chamber 1 heated to a high temperature is not easily transmitted from the wall surface of the heating chamber 1 to the exhaust gas purifier 4 via the exhaust passage 3. Therefore, there is a problem that the exhaust gas purifier 4 composed of the catalyst cannot be sufficiently decomposed and purified.

The exhaust passage 3 is formed in a chimney shape, and the exhaust intake port 2 and the exhaust port 8 are connected to the heating chamber 1.
This configuration has a chimney action (natural draft action) because the exhaust passage 3 and the exhaust port 8 are positioned so as to be sequentially higher than the exhaust intake port 2 because they are open to both sides. Then, if the heating chamber 1 is preheated to a certain cooking temperature, the hot air in the heating chamber 1 will be naturally exhausted little by little, and the energization rate of the electric heating means 9 and 10 will be increased, resulting in a problem that the energy saving effect is deteriorated. Had. In addition, as for the overall configuration of the heating cooker, the exhaust passage 3 having a high temperature is located transversely above the heating chamber 1, so that a limited space is required.
In addition to limiting the degree of freedom with respect to the arrangement of many controls and small parts in the heating chamber, and the arrangement location of control parts and the like generally arranged above the heating chamber 1,
There was a problem that it became difficult to secure those cooling passages.

[0007]

According to the present invention, in order to solve the above-mentioned problems, a part of a side wall surface of a heating chamber is opened, and a part of a wall surface of an oil / smoke remover enters the opening, and the heating chamber is heated. This is configured so as to also be used as the side wall surface.

According to the above invention, in performing oven and grill cooking, if the heating chamber is preheated to a predetermined temperature in advance, the entire heating chamber is heated to that temperature, and naturally, the oil smoke used also as the wall surface of the heating chamber The side surface of the remover reaches a preheating temperature, and heat is conducted from the side surface to the catalyst body, and the catalyst body is also heated to the same degree as the preheating temperature. Therefore, the catalyst body is always in a standby state where at least the inflowing oily smoke and the like can be subjected to the catalytic decomposition reaction, and can effectively remove the oily smoke and the like generated together with the cooking operation. In addition, since the position of the exhaust port is lower than the position of the exhaust intake port, the configuration of the exhaust passage has a kind of trapping action unless the exhaust fan is operated, so that the natural draft action is greatly suppressed. Therefore, the hot air in the heating chamber is less likely to be exhausted from the exhaust port, and the duty ratio of the electric heating means is suppressed, resulting in an energy saving effect and a large practical effect.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to an exterior fixed on a substrate, a heating chamber arranged in the exterior, heating means arranged in the heating chamber, and a microwave on the upper side of the heating chamber. A power supply port having an open end of a waveguide that propagates, a part of a wall portion of the heating chamber between an inner wall surface of the exterior and an outer wall surface of the heating chamber is configured as a part of an oil and smoke remover, An oil smoke purifier having an exhaust air inlet provided with a punching hole for blocking microwaves on a part of the wall surface of the heating chamber, an exhaust air passage, a heating means, an oil smoke purifying means, and an intake exhaust means. is there.

When the heating chamber is preheated to a predetermined temperature, the entire heating chamber is heated to that temperature. Naturally, the side surface of the oil smoke purifier, which is the wall surface of the heating chamber, reaches the preheating temperature, from which heat is conducted to the catalyst body, and the catalyst body is also heated to the same level as the preheating temperature. Therefore, the catalyst body is always in a standby state in which the catalytic decomposition reaction can be performed at least with respect to the inflowing oil smoke and the like, and can effectively remove the oil smoke and the like generated together with the cooking operation.

Even if the generated organic impurities such as oily smoke adhere to the exhaust air intake port, they are heated to a high temperature by the heating means, so that they evaporate, disappear, or fall down along the heating chamber wall to the lower part of the heating chamber. Thus, it hardly accumulates in the exhaust air intake port, and there is no problem that the ventilation resistance of the exhaust air intake fan is increased.

An exhaust air inlet provided with a punching hole for blocking microwaves in a part of an upper wall surface of the heating chamber, an exhaust air passage for sucking hot air from the exhaust air inlet, and a downstream portion of the exhaust air passage. Heating means, oil smoke purifying means for purifying oil smoke and the like, an exhaust fan, and an exhaust port are sequentially provided, and the exhaust port is provided at a position lower than the arrangement position of the exhaust intake port.

Since the position of the exhaust port is lower than the position of the exhaust intake port, the structure of the exhaust air passage has a kind of trapping action unless the exhaust fan is operated. Draft action is greatly suppressed, the hot air in the heating chamber is less likely to be exhausted from the exhaust port, and the electrical conductivity of the electric heating means is suppressed, thus having an energy saving effect.

Further, a high-voltage power transformer for a magnetron and the like are arranged near a lower portion of a self-cooling fan for cooling a motor for an exhaust fan provided near an exhaust port of the oil and smoke purifier.

When the high-voltage power transformer operates, the temperature rises due to the heat generated by the transformer itself. In particular, when the cooling is performed by the intake action of the cooling fan, the transformer has a square shape, so that the flow of the smooth airflow is smooth. It is easy to generate an air stagnation area and the cooling effect is not sufficient, but the rotation of the self-cooling fan of the exhaust fan has an effect of suppressing the air stagnation area so that the cooling air flows smoothly. The transformer can be effectively cooled.

An exhaust inlet provided with a punching hole for blocking microwaves in the upper part of the heating chamber, and a heating means, an oil-smoke purifying means and an exhaust gas provided downstream of an exhaust air passage provided in communication with the exhaust inlet. An oil / smoke purifier having an air intake means is mounted on a wall of the heating chamber by bonding.

[0017] Even if an oil smoke purifier having a different structure from the heating chamber is formed, the oil and smoke purifier is mounted so as to be joined to the wall surface of the heating chamber, so that heat conduction in the heating chamber is sufficiently performed.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a front sectional view of a heating cooker according to Embodiment 1 of the present invention. FIG. 2 is a side sectional view of a main part of the cooking device, and FIG. 3 is a side view of the cooking device with the exterior removed. In the figure, reference numeral 20 denotes a heating chamber for heating a foodstuff 21. The heating chamber 20 is fixed on a substrate 22, and an exterior 23 covering the heating chamber 20 is also fixed on the base 22. Is provided. A door 26 provided with a handle 25 and capable of opening and closing is provided on the front surface of the heating chamber 20, and rails 27 made of ceramic are detachably mounted on left and right wall surfaces of the heating chamber 20. -Juice tray 2 at the lower part using the screw 27 as a guide
8. Heat-resistant cooking net 29 on which food 21 is placed
Are detachably provided. In the upper space of the heating chamber 20, a heating means 30 made of a seed heater or a miraclon heater or the like, and a similar heating means 31 in the middle part between the soup tray 28 and the cooking net 29 are fixed. The input terminal portion 32 projects to the front left and is fixed to the side wall surface of the heating chamber 20.

A top plate 33 made of ceramic which transmits microwaves is fixed to a top plate portion of the heating chamber 20 by a fixture 34. A power supply port 35 for irradiating microwaves into the heating chamber 20 is opened in a top plate portion of the heating chamber 20,
A rotary antenna 37 connected to a driving motor 36 for irradiating the microwave into the heating chamber 20 with good distribution is provided above the power supply port 35. Reference numeral 38 denotes a waveguide for supplying the microwave generated from the magnetron 39 to the rotating antenna 37 and the heating chamber 20. Reference numeral 40 denotes a cooling fan for cooling the magnetron 39. Reference numeral 41 denotes a door ratchet section for opening and closing a main power supply with the door 26.

In particular, in the configuration, the side wall surface of the heating chamber 20 is:
The heating chamber 2 is also used as a component of the oil and smoke purifier 42.
Above the side wall surface 43, an exhaust air inlet 44 provided with a punching hole for blocking microwaves is provided. An exhaust air passage 45 is formed by a rectangular case 47 so as to be connected to the exhaust air inlet 44. It is configured. Downstream of the exhaust air passage 45 communicating with the exhaust air intake port 44, a purifying and heating means 48a made of a miraclon heater is disposed, and further downstream of the exhaust air passage 45, a heat purification catalyst body 48 is provided. An exhaust fan 50 connected to a drive motor 49 is further disposed downstream of the exhaust fan 50. An exhaust port 51 is opened at the end of the exhaust ventilation passage 45, and is mounted on a part of the exterior 23. I have. The positional relationship between the height of the exhaust air inlet 44 and the height of the exhaust air port 51 is such that the exhaust air port 51 is lower than the exhaust air inlet port 44.

A drive motor is provided at the end of the exhaust fan 50.
A self-cooling fan 52 for cooling the rotor 49 and the bearing unit is provided. Reference numeral 53 denotes a heat insulating material (indicated by a dashed line) covering almost the entire area of the heating chamber 20.

Next, the operation will be described. By operating the operation panel 24, the food 20 placed on the cooking net 29 in the heating chamber 20 first receives the microwave through the waveguide 38, the rotating antenna 37, and the power supply port 35 by the magnetron 39. The food 21 is heated from the skin or the inside of the food 21. In addition, the heating means 30 and 31 arranged above and below the heating chamber 20 heat the upper and lower surfaces of the foodstuff 21 and brown and cook deliciously. As the cooking process progresses, the temperature of the foodstuff 21 rises as a whole, and finally the moisture inside the foodstuff 21 starts to evaporate, and then the odor peculiar to the foodstuff 21 itself is generated. In the part, baking starts, generating oily and oily smoke. These organic substances
Oil and smoke purifier 4 receiving heat from the heating chamber 20 heated to a high temperature
The second heat purification catalyst 48 acts so as to be sufficiently preheated. In addition, the suction and heating of the exhaust fan 49 and the purifying and heating means 48a, which are operated in parallel with the cooking, cause the exhaust air passage 4
5 and is further heated to a high temperature, and is oxidized and purified by the heat of the purification heating means 48a. Accordingly, oily smoke and the like are almost purified and are discharged from the exhaust port 51 as exhaust gas in a smokeless state. As described above, since one surface of the oil and smoke purifier 42 is also used as a component of the heating chamber 20, the oil and smoke purifier 42 is heated to about the same temperature as the preheating temperature of the heating chamber 20. The heat purification catalyst 48 is
Since it is always maintained at a temperature at which at least oil smoke can be purified, the heat purification catalyst 4
8 makes it possible to further accelerate the rising and purifying action at an early stage, and further reduce the duty ratio of the purifying and heating means 48a,
Some of them have a great practical effect, for example, they do not lower the heating power of the heating means 30 and 31 in the heating chamber 20. In addition, the decrease in the duty ratio of the purifying and heating means 48a is caused by
It is a great energy saving effect.

(Embodiment 2) FIG. 2 is a sectional side view of a main part of a heating cooker according to Embodiment 2 of the present invention. The difference from the first embodiment is that the height arrangement of the exhaust port 51 is arranged lower than the height position of the exhaust air inlet 44.

Next, the operation and operation will be described. With the above-described configuration, the exhaust air passage 45 has a kind of trapping effect thermally. That is, when the heating chamber 20 is preheated to a high temperature, the hot air in the heating chamber 20 becomes a single chimney in the exhaust air passage 45 and does not flow out toward the exhaust port 51 by a draft action. The preheating temperature in the heating chamber 20 is controlled stably, and the heating means 3 in the heating chamber 20 is controlled.
0, 31 and the electric conduction rate of the purifying and heating means 48a are lower, and the energy saving effect is achieved, and the high heating power despite the addition of the oil smoke purification function without lowering the heating power of the heating means 30, 31 is high. Can be maintained.

(Embodiment 3) FIG. 1 is a front sectional view of a heating cooker according to Embodiment 3 of the present invention. The difference from the first embodiment is that the exhaust air inlet 44 is constituted by a punching plate provided with a small hole for blocking the microwave irradiated into the heating chamber 20 and opposes or is closest to the small hole. The cleaning and heating means 48a is arranged in the vicinity.

Next, the operation and operation will be described. Vapors, oil droplets, oil smoke, scattered high-temperature food substances and the like from the foodstuff 21 generated during cooking adhere to the small holes of the exhaust air inlet 44 and close the small holes thereby to close the small air holes. Although the ventilation resistance is increased and the generated oily smoke and the like cannot be purified and removed at last, since the purification and heating means 48a is installed in opposition to or closest thereto, the high temperature radiation of the purification and heating means 48a causes the adhered substance to adhere. Is heated to a high temperature, so that it hardly evaporates, disappears, or falls along the heating chamber wall to the lower part of the heating chamber and deposits on the exhaust air inlet 44, thereby increasing the ventilation resistance of the exhaust fan 50. This does not cause any problem.

(Embodiment 4) FIG. 3 is a side view of a main part of a heating cooker according to a fourth embodiment of the present invention, in which the exterior of the heating cooker is removed. The difference from the first embodiment is that a high-voltage power supply transformer 54 is provided near a self-cooling fan 52 mounted at an end of an exhaust fan 50.

Next, the operation and operation will be described. At the start of cooking, the temperature of the high-voltage power supply transformer 54 rises due to the heat generated by the transformer 54 itself. Particularly, when cooling is performed by the suction action of the cooling fan 40, the transformer 54 has a square shape and therefore has a smooth airflow. Although it is difficult for the air to flow, an air stagnation area is easily generated and the cooling function is not sufficient, but the rotation of the self-cooling fan 52 of the exhaust fan 50 acts to suppress the air stagnation area so that the cooling air flows smoothly. Therefore, the cooling of the transformer 54 can be performed effectively.

(Embodiment 5) FIG. 4 is a sectional view of a main part of an oil smoke purifier of a heating cooker of a heating cooker according to a fifth embodiment of the present invention. The difference from the first embodiment is that the oil smoke purifier 4 of the heating cooker is used.
2 is a portion configured differently from the side wall surface 20 of the heating chamber,
The oil and smoke removing unit is mounted with a fixing tool such as a screw (not shown) so as to correspond to the exhaust air inlet 44 of the heating chamber 20 and to make the oil and smoke removing unit 55 adhere to the side wall surface of the heating chamber 20. . At this time, it is effective to apply an adhesive member such as a silicon material having good heat conductivity and heat resistance or apply a heat conductive seal material to the above-mentioned contacting portion.

Next, the operation and operation will be described. Even in the case where the oil smoke purifier 42 is configured separately from the heating chamber 20, since it is mounted so as to be joined to the wall surface of the heating chamber, the heat conduction of the heating chamber 20 is sufficiently performed, and thus has much more effects than the conventional example. .

[0032]

As described above, according to the present invention, a part of the side wall surface of the heating chamber is opened, and a part of the side wall surface of the oil smoke purifier enters into the opening part, and is also used as the side wall surface of the heating chamber. When the heating chamber is preheated to a predetermined temperature in the cooking of the oven and the grill, the entire heating chamber is heated to that temperature, and the oil smoke is used also as the side wall surface of the heating chamber. The temperature reaches the preheating temperature of the side surface of the purifier, and heat is conducted from the side surface to the heat purification catalyst body, and the heat purification catalyst body itself is heated to the same degree as the preheating temperature. Therefore, the heat purification catalyst is always in a standby state in which the catalytic decomposition reaction can be performed at least with respect to the inflowing oil smoke and the like, and can effectively purify and remove the oil smoke and the like generated during cooking.

Further, since the position of the exhaust port is lower than the position of the exhaust intake port, the structure of the exhaust air passage has a kind of thermal trapping function unless the exhaust fan is operated, so that it is natural. Draft action is greatly suppressed, the hot air in the heating chamber is very rarely discharged from the exhaust port, and the duty ratio of the electric heating means is suppressed, resulting in an energy saving effect.

Further, since an oil smoke purifier is provided on the side wall of the heating chamber, which is provided with a heating means provided as opposed to or as close to the inside of the exhaust air inlet as possible, organic impurities such as generated oil smoke are removed from the exhaust air inlet. Even if it adheres to the exhaust air inlet, it is heated to a high temperature by the heating means provided opposite to the exhaust air inlet, so that it evaporates, disappears, or falls along the wall of the heating chamber to the lower portion of the heating air inlet. Is hardly deposited on the exhaust gas, and does not increase the ventilation resistance of the exhaust air intake fan.

Further, since a high-voltage power transformer for a magnetron and the like are arranged near a lower part of a self-cooling fan for cooling a motor for the exhaust fan provided near an exhaust port of the oil and smoke purifier, a high-voltage power supply is provided. When the transformer operates, the temperature rises due to the heat generated by the transformer itself. However, when the cooling is performed by the intake action of the cooling fan, the transformer is square because of its square shape.
It is difficult for the air flow to flow smoothly, and an air stagnation area is easily generated, and the cooling action is not sufficient. However, the rotation of the self-cooling fan of the exhaust fan produces an action to suppress the air stagnation area, so that the cooling air flows smoothly. Therefore, the cooling of the transformer can be effectively performed.

In addition, a power supply port having an opening at the top end of a waveguide for transmitting microwaves from a magnetron above the heating chamber, an exhaust air inlet provided with a punching hole for blocking microwaves, and communicating with the exhaust air inlet. An oil smoke purifier having a heating means, an oil smoke purification means, and an exhaust air intake means is provided on the other side wall surface of the heating chamber and is provided downstream of the exhaust air passage. Even if it is configured as an oil smoke purifier, since it is mounted so as to be joined to the wall surface of the heating chamber, the heat conduction of the heating chamber is sufficiently performed, so that an effect much higher than the conventional example is expected.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a heating cooker according to a first embodiment of the present invention.

FIG. 2 is a side sectional view of a main part of the cooking device according to the second embodiment.

FIG. 3 is a side view of a main part of the heating cooker according to the third embodiment with the exterior removed.

FIG. 4 is a partial cross-sectional view of a main part of an oil smoke remover of the cooking device according to the fourth embodiment.

FIG. 5 is a sectional view of a main part of a conventional heating cooker.

FIG. 6 is a sectional view of a main part of the cooking device.

[Explanation of symbols]

 Reference Signs List 20 heating chamber 22 substrate 23 exterior 30, 31 heating means 35 power supply port 39 magnetron 42 oil and smoke purifier 44 exhaust intake port 45 exhaust air passage 48 heat purification catalyst body 48a purification heating means

Continuation of front page (72) Inventor Masachi Orita 1006 Kazuma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. An exterior fixed on a substrate, a heating chamber disposed in the exterior, a heating means disposed in the heating chamber, and a waveguide for propagating microwaves in an upper portion of the heating chamber. A power supply port having an open end, a part of the wall surface of the heating chamber between the inner wall surface of the exterior and the outer wall surface of the heating chamber is configured as a part of an oil smoke remover, and one of the wall surfaces of the heating chamber is formed. A heating cooker comprising: an exhaust air inlet provided with a punching hole for blocking microwaves in a portion thereof; an exhaust air passage; a purifying / heating means; an oil smoke purifying means; 2. An exhaust air inlet provided with a punching hole for blocking microwaves in an upper wall portion of the heating chamber, an exhaust air passage for sucking hot air from the exhaust air inlet, and a downstream air passage provided in the exhaust air passage. Purification heating means, oil smoke purification means for removing oil smoke, etc., an exhaust fan, and an exhaust port are sequentially provided,
The cooking device according to claim 1, wherein the exhaust port is provided at a position lower than a position where the exhaust intake port is arranged. 3. A magnetron high-voltage power transformer is arranged near a self-cooling fan provided near an exhaust port of an oil and smoke purifier for cooling an exhaust fan motor itself.
Or the heating cooker according to 2. 4. An exhaust air inlet provided with a punching hole for blocking microwaves in an upper portion of the heating chamber, and an oil / smoke purifier downstream of an exhaust air passage provided in communication with the exhaust air inlet. The heating cooker according to any one of claims 1, 2, and 3, wherein the cooking device is joined to the heating cooker.