JP5001247B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device that accommodates an object to be heated in a cooking device body, and more particularly to a roaster provided at a lower portion of an induction heating cooking device.

  In a conventional cooking device, an exhaust path leading to the inside of the cooking chamber and the outside air, a catalyst installed in the middle of the exhaust path, and a smoke removal heater installed in the exhaust path leading to the catalyst ( (Hereinafter also referred to as a catalyst heater), a smoke removal fan disposed on the exhaust path downstream of the catalyst, and a cooking heater on the upper and lower portions of the grill, and only the smoke removal heater at the start of cooking In addition, the upper cooking heater can be energized for a certain period of time, and after reaching a temperature at which the catalyst can fully perform, the lower cooking heater and smoke removal fan can be energized to control the performance of the catalyst. Some have accelerated the speed of reaching a certain temperature zone (see, for example, Patent Document 1).

Japanese Patent No. 3587177 (Page 4, FIG. 5)

  In the conventional cooking device shown in Patent Document 1, as described in the background art, an exhaust duct is provided for the purpose of desmoking in the heating chamber, and the deodorizing and deodorizing catalyst housed in the exhaust duct is heated to thereby remove the catalyst. By improving the purification performance, the smoke and odor generated from the cooked food in the heating chamber was removed, suppressed and exhausted.

  Platinum, palladium, etc. are used for the deodorizing and deodorizing catalyst, and in order to exert its effective desmoking and deodorizing performance, it is necessary to heat the temperature of the catalyst to over 300 ° C. Another catalyst heater is provided. Taking a roaster for an induction heating cooker as an example, a sheathed heater with an output of about 300 W is generally attached. Normally, the exhaust fan and the catalyst heater continue to be energized during cooking of the roaster. In addition, there is a problem that power consumption is large.

  In addition, conventional heating cookers have cooking heaters at the top and bottom of the grill, but the upper heater is installed near the top of the heating chamber using a sheathed heater, etc. The top surface of the heating chamber located on the opposite side to the surface facing the object to be heated is heated. The heated top surface radiates heat to the outside, or was used to increase the temperature of components built in the surrounding area, resulting in heat loss. Furthermore, the heater provided in the lower part of the grill has adhered to oil and food residue falling from the food to be heated, and has been a cause of fire and smoke.

  The present invention has been made in view of the above-mentioned problems, and heats food without installing heaters in the upper and lower portions of the grill, or in a state where the number of heaters installed in the same portion is minimized. Among them, the purpose is to reduce the power consumption of the catalyst heater used for catalyst heating by installing a heater so that the heat loss that is not used for food heating contributes to the catalyst heating.

A heating cooker according to the present invention includes a heating chamber, a grille on which food is placed, a saucer installed under the grille, a drawer-type door capable of simultaneously drawing the grille and the saucer, and heating. An exhaust duct for exhausting smoke and odor generated inside the chamber, an opening of the exhaust duct provided on the back of the heating chamber and communicating with the exhaust duct, a fan provided in the exhaust duct, and upstream of the fan And a catalyst for deodorizing and deodorizing the exhaust gas and a heater disposed near the opening of the exhaust duct and below the grille, and the heater has two surfaces with relatively high radiation intensity. by having a radiation distribution having a directivity in the two directions, toward one of directivity directions baked network side, which the other located toward the catalyst, is to heat the food and a catalyst.

According to the heating cooker of the present invention, the amount of heat generated that is conventionally discarded as a heat loss through the temperature rise of the casing of the heating chamber can be used to heat the object to be heated and the smoke removal deodorization catalyst at the same time. Therefore, the efficiency can be improved with respect to the power consumption .

Embodiment 1 FIG.
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a cooking device in an embodiment for carrying out the present invention, and FIG. 2 is a cross-sectional view of a main part of a heating chamber of the cooking device.

  The IH cooking heater 20 mainly includes an induction heating unit 21 that performs cooking of pans and frying pans, a roaster 22 that performs grilling fish, and an operation panel 23 that performs operations. The present invention relates to the roaster 22 and a detailed description of the induction heating unit 21 and the like is omitted.

  FIG. 2 is a cross-sectional view of the main part of the roaster 22. The heating chamber 1 is composed of a metal casing and a door 2, and the door 2 is composed of a visual recognition window 3 and its frame, and is fitted to a rail 5 and grips the handle 4 so that the rear (see FIG. It is constructed so that it can be smoothly pulled out and stored from the right side of the middle sheet to the front. From the viewing window 3, the cooking state in the heating chamber 1 can be confirmed.

  In the frame of the door 2, a tray 6 for receiving oil dripping from the heated object 30 and a grill 7 for installing the heated object 30 are installed in a detachable state, and dirt inside the cooking chamber is removed. In addition to the prevention, both the tray 6 and the grill 7 can be removed and cleaned after cooking.

  When cooking fish or the like, smoke and odor are generated, and therefore, a deodorization catalyst 17 is installed in the exhaust duct 14 on the back side of the heating chamber 1 and heated by the catalyst heater 10 as a deodorization / smoke exhaust device. Thus, while exhibiting the catalytic effect, the exhaust fan 11 rotated by the driving force of the fan motor 12 causes the smoke to be discharged from the upper surface of the main body through the exhaust port 13. The exhaust port 13 is installed in a form communicating with the induction heating unit 21 back side, and the smoke is usually discharged to the outside by a ventilation fan or a range hood fan (both not shown) installed in the upper part of the kitchen.

  The lower glass tube heater 8 and the upper glass tube heater 9 that are the basis of the present invention are installed on the back surface of the heating chamber 1 and in the vicinity of the opening 18 of the exhaust duct 14 installed on the back surface of the heating chamber 1. Is done. More specifically, it is arranged in the vicinity of the opening 18 of the exhaust duct 14 installed on the back surface of the heating chamber 1 and above the tray 6 and below the grill 7 or on the back surface of the heating chamber 1. It is arranged near the opening 18 of the installed exhaust duct 14 and at a position above the grill 7. The lower glass tube heater 8 and the upper glass tube heater 9 will be described later in detail with respect to the lower glass tube heater 8 and the upper glass tube heater 9, but the receiving tray 6 and the grill net 7 installed in the door 2 are accommodated to the deepest part. In this state, a space is provided between the lowermost glass tube heater 8 and the upper glass tube heater 9 in the glass and the rearmost surface of the grill 7 so that fragments are covered even if the glass is broken. Since it falls to the bottom of the heating chamber 1 or the receiving tray 6 without being mixed into the heated object 30, there is no danger of foreign matter becoming a mouth.

  The lower glass tube heater 8 and the upper glass tube heater 9 are installed at the substantially lower end portion and the substantially upper end portion of the rear surface of the heating chamber 1, respectively, and are installed toward the heated object 30 placed on the grill net 7. In addition to radiantly heating the object 30 to be heated, the smoke removal deodorization catalyst 17 is also heated through the opening 18 of the exhaust duct 14 located on the opposite side of the object 30 to be heated.

  Although it is possible to sufficiently heat the object to be heated 30 even by heating by radiant heat from the lower glass tube heater 8 and the upper glass tube heater 9, it is possible to correct the heating non-uniformity depending on the installation location of the object to be heated 30 and When it is desired to improve the cooking finish of the heated object 30, when receiving the upper sheath heater 31 (which constitutes the top heater) 31 provided in the front part of the top of the heating chamber 1 and the door 2, the tray 6 and the grill 7 Heating is performed in a complementary manner by lower sheathed heaters 32 (constituting a top heater) provided at positions that do not interfere with each other.

  Reference numeral 15 denotes a temperature sensor for measuring the temperature in the heating chamber 1 and is composed of a thermistor or the like. The required temperature in the heating chamber 1 differs depending on cooking, but when the set temperature is reached in accordance with the setting / input of the operation unit 23, each heater is turned off, and the temperature in the heating chamber 1 is an arbitrary temperature from the set temperature When the heater 30 is lowered, the control of turning on each heater again is performed, so that the article 30 to be heated can be heated with good finish. In the case where the temperature is measured by dividing the region, it can be configured to detect by installing a compound eye infrared sensor at an appropriate position in the heating chamber 1.

  FIG. 3 is a longitudinal sectional view of the lower glass tube heater 8 and the upper glass tube heater 9 according to Embodiment 1 of the present invention. As shown in FIG. 3 (a), the glass tube heater includes a carbon filament 40, which is a carbon composite material having a purity of 99% or more, and a glass tube 41 made of quartz glass that seals the periphery, and the inside of the glass tube 41 is argon. An inert gas such as is enclosed to prevent deterioration of the carbon filament 40 due to oxidation.

  FIG. 3B shows the radiation intensity distribution of the heater. The length of the arrow in the figure indicates the radiation intensity, and the distribution is an 8-shaped distribution showing a strong radiation distribution in the direction perpendicular to the long side of the rectangular section with the carbon filament 40 as the center. As shown in FIG. 3 (b), the carbon filament 40 has a rectangular cross section and generates heat from substantially the entire surface, so that it has a relatively strong radiation distribution in a direction perpendicular to the long side of the rectangle. .

  FIG. 3 (c) shows a structure in which the glass tube has a double structure in order to increase the strength of the heater. By installing an outer glass tube 42 with respect to FIG. 3 (a), the main body of the heater is shown. It becomes possible to protect the glass tube 41 which can be said a part and to suppress deterioration. Further, by providing a glass tube reflection plate 43 between the outer glass tube 42 and the glass tube 41, stronger radiant heating is possible in a desired direction, for example, the direction of the object to be heated. The outer glass tube 42 is for the purpose of protecting the glass tube 41 and reducing the possibility of deterioration by lowering the surface temperature of the outer glass tube 42, and there is not necessarily a gap between the glass tube 41 and the outer glass tube 42. It is not necessary to seal with active gas or the like.

FIG. 4 schematically shows the state of radiant heating when the lower glass tube heater 8 and the upper glass tube heater 9 are applied to the roaster 22 shown in FIG.
A solid arrow indicates a heat ray directly radiated from the glass tube heater, and a broken arrow indicates a heat ray from the heater reflected on the wall surface in the heating chamber 1. Moreover, it shows that radiation intensity is so large that line | wire width is thick.

  In the lower glass tube heater 8 and the upper glass tube heater 9, the strong radiation direction of the carbon filament 40, that is, the direction perpendicular to the long side of the rectangular cross section is aimed at the portion near the door 2 on the grill net 7. The radiant heating is carried out as evenly as possible on the object to be heated 30 by installing it at an angle. In FIG. 4, θ 1 indicates the filament installation angle of the upper glass tube heater 9, and θ 2 indicates the filament installation angle of the lower glass tube heater 8.

Since the radiation intensity decreases in inverse proportion to the square of the distance as the distance increases, the heating is more easily leveled when the strong radiation direction is as far as possible with respect to the installation surface of the object 30 to be heated. Therefore, θ1 and θ2 are respectively set such that the horizontal distance from the upper and lower glass tube heaters to the front end of the grill 7 is X, and the vertical distance from the upper glass tube heater 9 to the grill 7 is Y1. When the vertical distance to the mesh 7 is Y2, the lower glass tube heater 8 and the tan θ1 = Y1 / X to (Y1 + Y2) / X and tanθ2 = Y2 / X to (Y1 + Y2) / X By installing the upper glass tube heater 9, it becomes possible to heat the object to be heated 30 placed on the grill net 7 almost entirely.
Further, by applying a heat ray reflective coating (not shown) such as a metal oxide film to the glass of the visual recognition window of the door 2, the heat ray is reflected inside the heating chamber 1, thereby minimizing heat leakage from the glass. It becomes possible.

  On the other hand, the opposite surface of the carbon filament 40 which is another strong radiation direction is installed so as to effectively radiate and heat the smoke removal deodorization catalyst 17 of the exhaust duct 14. It is possible to heat the smoke removal deodorization catalyst 17.

  When the output by the lower glass tube heater 8 and the upper glass tube heater 9 is not sufficient, for example, when it is desired to suppress the output of individual heaters, or when there is a factor in the heating chamber 1 that obstructs the heat rays shown in FIG. In such cases, it is also possible to perform complementary heating with the upper sheathed heater 31, the lower sheathed heater 32, the catalyst heater 10, or the like. In particular, depending on the type, amount, and shape of the object to be heated 30 placed on the grille 7, the object to be heated 30 on the back side of the heating chamber 1 is often baked due to the characteristic of heating from the back side, but in front of the heating chamber 1. There may be a case where the heated object 30 on the side is not sufficiently baked. In that case, the upper sheathed heater 31 and the lower sheathed heater 32 are relatively arranged to complement the heating on the front side of the heating chamber, so that cooking finish is achieved, and in particular, uniform heating can be realized.

  With this structure, the amount of heat that was previously discarded as a heat loss through the rise in the temperature of the casing of the heating chamber 1 can be used for heating the deodorizing and deodorizing catalyst 17 simultaneously with the object to be heated 30. The efficiency can be improved with respect to the power consumption.

  Even when the upper sheathed heater 31, the lower sheathed heater 32, and the catalyst heater 10 are installed, this effect suppresses the output of the heater group itself, suppresses the rated output of the heater itself, and consequently suppresses the heater length. It is possible to reduce the material cost of the heater and to reduce the pressure loss with respect to the exhaust gas passing through the duct.

Embodiment 2. FIG.
FIG. 5 is a cross-sectional view of the main part showing the second embodiment of the roaster 22. The lower glass tube heater 8 and the upper glass tube heater 9 are accommodated in the lower end and the upper end of the back of the heating chamber 1, respectively, and an infrared transmitting material 19 is installed to protect both glass tube heaters. For example, the infrared transmitting material 19 is made of quartz glass or transparent mica.
An opening 18 is provided on the upper side of the lower glass tube heater 8 and the lower side of the upper glass tube heater 9 in the storage portion so as to be directly connected to the exhaust duct 14. Heating is applied to accelerate the catalytic reaction.
The back surface of the heating chamber 1 is provided with the infrared transmitting material 19 and the duct opening 18 on substantially the same surface, and since there is no unevenness on the back surface, there is an effect that it is easy to perform a cleaning operation or the like.

Embodiment 3 FIG.
FIG. 6 is a cross-sectional view of the main part of the roaster 22 showing the third embodiment. The entire back surface of the heating chamber 1 is made the same as the opening 18 of the exhaust duct 14 and covered with the punching metal 24. The lower glass tube heater 8 and the upper glass tube heater 9 provided in the exhaust duct 14 are installed with one surface in the strong radiation direction facing the inside of the heating chamber 1 and the other surface facing the deodorizing and deodorizing catalyst 17. The heated object 30 and the deodorizing and deodorizing catalyst 17 can be heated at the same time, and even if the glass is broken, the glass fragments are not scattered inside the heating chamber 1 and have an effect of improving safety. Can do.

Embodiment 4 FIG.
FIG. 7 is a cross-sectional view of the main part of the roaster 22 showing the fourth embodiment. The lower glass tube heater 8 and the upper glass tube heater 9 are accommodated in the lower end and upper end of the back of the heating chamber 1, respectively, and the elasticity of the metal increased to a reflectance of about 0.9 by surface polishing or the like behind the heater. The reflector 25 which is a body is installed. By installing a heater fixture 26 for fixing the lower glass tube heater 8 and the upper glass tube heater 9 on the reflection plate 25, it is configured as a heater unit integrated with the reflection plate 25. The heater fixture 26 is made of an elastic metal and has an effect of releasing stress on the heater by absorbing thermal expansion of the heater and the reflector.
The heater fixture 26 is a heater support portion.
The reflector 25, the heater fixture 26, the upright piece 27, and the lower glass tube heater 8 or the upper glass tube heater 9 are each configured as an integral heater unit, and are removed from the heating chamber 1 by pulling from the heating chamber 1 side to the front side. Therefore, it is possible to perform component effects and cleaning as necessary.

  The heater fixture 26 has a structure that supports the non-heating portions of the lower glass tube heater 8 and the upper glass tube heater 9. Further, the portion that comes into contact with the glass is covered with a heat-resistant material such as silicon to prevent scratches. In the unlikely event that the glass breaks at the end of the reflecting plate 25, it is possible to improve safety by providing an upstanding piece 27 that receives the broken piece and prevents it from falling to the heating chamber 1 side.

  In the case of this configuration, radiation heating cannot be directly performed on the smoke removal deodorization catalyst 17, but a catalyst heater that heats the smoke removal deodorization catalyst 17 by increasing the temperature of the peripheral portion through the side wall of the exhaust duct 14. It plays the role of 10 heating aids.

It is a perspective view of the heating cooker which shows Embodiment 1 of this invention. It is a heating chamber principal part side sectional view of the cooking-by-heating machine which shows Embodiment 1 of this invention. It is a sectional side view of the glass tube heater of the heating cooker which shows Embodiment 1 of this invention. It is a schematic diagram showing the mode of the radiant heating of the heater of the heating cooker which shows Embodiment 1 of this invention. It is a heating chamber principal part side sectional drawing of the heating cooker which shows Embodiment 2 of this invention. It is a heating chamber principal part side sectional drawing of the heating cooker which shows Embodiment 3 of this invention. It is a heating chamber principal part side sectional drawing of the heating cooker which shows Embodiment 4 of this invention.

Explanation of symbols

  1 Heating chamber, 2 doors, 3 viewing windows, 4 handles, 5 rails, 6 pan, 7 grill, 8 lower glass tube heater, 9 upper glass tube heater, 10 catalyst heater, 11 exhaust fan, 12 fan motor, 13 exhaust Mouth, 14 Exhaust duct, 15 Temperature sensor, 17 Smoke deodorization catalyst, 18 Exhaust duct opening, 19 Infrared transmitting material, 20 IH cooking heater body, 21 Induction heating unit, 22 Roaster, 23 Operation unit (input means), 24 Punching Metal, 25 Reflector, 26 Heater fixture, 27 Standing piece, 30 Object to be heated, 31 Upper sheathed heater, 32 Lower sheathed heater.

Claims (17)

A heating chamber;
A grill to place food,
A saucer installed under the grill;
A drawer type door capable of simultaneously pulling out the grill and the saucer;
An exhaust duct for discharging smoke and odor generated inside the heating chamber;
An opening of an exhaust duct provided on the back surface of the heating chamber and communicating with the exhaust duct;
A fan provided in the exhaust duct;
A catalyst upstream of the fan to dehumidify and deodorize the exhaust;
A heater disposed near the opening of the exhaust duct and at a position below the grill net,
The heater has a radiation distribution having directivity in two directions by having two surfaces with relatively high radiation intensities, with one of the directivity directions directed to the side of the grill and the other to the catalyst. A cooking device, wherein the cooking device is installed to heat the food and the catalyst. A heating chamber;
A grill to place food,
A saucer installed under the grill;
A drawer type door capable of simultaneously pulling out the grill and the saucer;
An exhaust duct for discharging smoke and odor generated inside the heating chamber;
An opening of an exhaust duct provided on the back surface of the heating chamber and communicating with the exhaust duct;
A fan provided in the exhaust duct;
A catalyst upstream of the fan to dehumidify and deodorize the exhaust;
Near the opening of the exhaust duct and, and a heater disposed in the upper side position of the grill,
The heater has a radiation distribution having directivity in two directions by having two surfaces with relatively high radiation intensities, with one of the directivity directions directed to the side of the grill and the other to the catalyst. A heating cooker, which is installed toward the center and heats the food and the catalyst. A heating chamber;
A grill to place food,
A saucer installed under the grill;
A drawer type door capable of simultaneously pulling out the grill and the saucer;
An exhaust duct for discharging smoke and odor generated inside the heating chamber during heating;
An opening of an exhaust duct provided on the back surface of the heating chamber and communicating with the exhaust duct;
A fan provided in the exhaust duct;
A catalyst upstream of the fan to dehumidify and deodorize the exhaust;
Provided in the vicinity of the catalyst, the catalyst and a heater for heating the food,
The heater has a radiation distribution having directivity in two directions by having two surfaces with relatively high radiation intensity, and is arranged near the opening of the exhaust duct and above and below the grille. The two directivity directions of the upper and lower heaters are set such that one is directed toward the door from the center of the grill net and the other is directed toward the catalyst, and the upper and lower surfaces of the food are placed in the heating chamber. A heating cooker characterized in that the catalyst is heated simultaneously with heating from the back side.   The front surface of the heater is installed so as to be closer to the back side than the rearmost part of the grill net when the grill net is stored in the heating chamber. The cooking device described. The heater is a glass tube heater filled and sealed with an inert gas,
The glass tube heater uses a carbon-based heating element as a heating source filament, and the filament has a rectangular cross section, thereby having strong directivity in a direction perpendicular to the two long sides of the rectangle. It has radiation distribution, The heating cooker in any one of Claims 1-4 characterized by the above-mentioned.   2. A reflection plate that has been subjected to a surface treatment for increasing the reflectance on the heating chamber side is provided around the heater, and the opening surface of the reflection plate and the back surface of the heating chamber are substantially flush with each other. The heating cooker in any one of -5.   The cooking device according to claim 6, wherein a cover having infrared transparency is provided on an opening surface of the reflection plate.   The cooking device according to claim 6, wherein a cover made of a metal porous plate is provided on the opening surface of the reflection plate.   The cooking device according to claim 6, wherein an upright piece for holding a fallen object from the heater is provided on at least a part of the opening surface of the reflecting plate.   The cooking device according to any one of claims 6 to 9, wherein the heater is integrally formed as a heater unit by being supported by a heater support portion installed on a reflector.   The cooking device according to claim 10, wherein the heater unit is detachable from the heating chamber.   6. The heating cooker according to claim 5, wherein the glass tube heater is constituted by a double tube comprising an inner tube for sealing a heating element and an outer tube for protecting the inner tube.   The cooking device according to claim 12, wherein the glass tube heater is provided with a reflection plate between an inner tube and an outer tube.   The cooking device according to any one of claims 1 to 13, wherein the heater is installed in the exhaust duct.   A top heater is installed on the top surface of the heating chamber, and the amount of heat generated from the top surface heater is relatively high on the front side of the heating chamber. The heating cooker in any one of Claims 1-14.   A lower surface heater is installed in the lower part of the grill and in the upper part of the tray, and the amount of heat generated from the lower surface heater is relatively high on the front side of the heating chamber. The heating cooker in any one of Claims 1-15.   The cooking device according to any one of claims 1 to 16, wherein a part of the door is made of glass whose inside can be visually recognized, and the glass is subjected to heat ray reflection treatment.

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