JP2011056062A - Heat cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems that, when using PTFE in a heat cooker conventionally, since a using temperature is restrained by the heat resistance of the PTFE, and a coating film cannot be applied at a part requiring antifouling or non-adhesion property due to temperature rise accompanying heat cooking depending on components, there is fixed restriction on the formation of the coating film containing the PTFE. <P>SOLUTION: The heat cooker includes: a heating means which is one of a heater, magnetron or an induction heating coil; and one of a cooking chamber, a cooking table, a tray, a cooking container and a top plate for performing heat cooking. Fine recesses and projections are provided on the surface of a component configuring one of the cooking chamber, the cooking table, the tray, the cooking container, the top plate, the heater and an exhaust air path, and a ceramic coating film in a three-dimensional crosslinking matrix structure having a siloxane bond by a sol and gel method is formed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cooking device that cooks a food material to be heated directly or indirectly by a heater, microwave, or electromagnetic induction heating.

Conventionally, proposals have been made to increase the antifouling property and non-adhesiveness by providing a film containing PTFE (fluororesin) on the surface of a component constituting the heating cooker (see Patent Documents 1 to 3).
In Patent Document 1, in the cooking cabinet of a hot plate that performs heating cooking with a heater, in a cooking cabinet of a hot plate that performs heating cooking with a heater or in a microwave oven cooking component with a heater or microwave (Patent Document 2 cooking with heating or electromagnetic induction heating ( Example of applying a film containing PTFE to the cooking container of a rice cooker that performs cooking, etc., on the component of the top plate on which the heated object of the induction heating cooker that performs cooking by induction heating is applied in Patent Document 3. Is described.

JP-A-6-337117 JP 2006-15114 A JP 2003-51374 A

However, in the conventional cooking device, when PTFE is used for the cooking device, the use temperature is restricted due to the heat resistance of PTFE, and depending on the part, the temperature rises due to cooking, so that antifouling and non-adhesiveness are present. There was a problem that a film could not be applied to a necessary site.
In addition, overseas, there are regulations on fluorine compounds (76/769 / EEC 30th revision 2006/122 / EC, etc.), and there is a problem that certain restrictions are imposed on the formation of films containing PTFE.
The present invention has been made to solve the above-described problems, and uses a film that does not contain PTFE as a component that constitutes a heating cooker, and forms a film on a part having a high temperature. A cooking device with less restrictions is provided.

Equipped with any heating means of heating, magnetron, induction heating coil and cooking room, cooking table, saucer, cooking container, top plate, cooking room, cooking table, saucer, cooking container, top plate In addition, fine irregularities are provided on the surface of a part constituting either the heater or the exhaust air passage, and a ceramic coating film having a three-dimensional crosslinked matrix structure having a siloxane bond is formed by a sol-gel method.

According to the present invention, the ceramic coating film can impart antifouling property and non-adhesiveness even in a high-temperature component where a film containing PTFE cannot be used, and is not subject to restrictions related to the formation of the PTFE film, and is easy to maintain. There exists an effect which can be set as the heating cooker which is easy to manufacture.

It is a perspective view of the whole heating cooker which shows Embodiment 1-4 of this invention. 1 is a perspective view of a main body 1 with a plate 6 and an intake / exhaust port cover 7 of a heating cooker showing Embodiments 1 to 4 of the present invention removed. FIG. 5 is a perspective view of a right substrate case unit 15 showing Embodiments 1 to 4 of the present invention. It is a perspective view which shows the whole cooker 18 which shows Embodiment 1-4 of this invention. It is a perspective view of the state which removed the ceiling surface of the cooking chamber 18, and the cooking chamber door 8 which shows Embodiment 1-4 of this invention. 1 is a side cross-sectional view of a cooking chamber 18 portion of a main body 1 showing Embodiments 1 and 2 of the present invention. It is sectional drawing of the film formation part of the ceramic coating which shows Embodiment 1-4 of this invention. It is side surface sectional drawing of the cooking chamber 18 part of the main body 1 which shows Embodiment 3, 4 of this invention.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing the entire heating cooker according to Embodiment 1 for carrying out the present invention.
In FIG. 1, a top plate 3 is detachably disposed on the upper side of a housing 2 of the main body 1 of the heating cooker. An intake / exhaust port cover 7 is disposed on the back side of the top 3. The exhaust port cover covers the intake port 12 and the exhaust port 13 formed in the top plate frame 4, and has an opening through which air can flow into and out of the air intake 12 and the air intake port. This prevents the food, which is to be cooked, from dropping to 12 and the exhaust port 13.

The surface of the intake / exhaust port cover 7 is formed with a ceramic coating A after forming fine irregularities by shot blasting or chemical etching. In the case of shot blasting, processing may be difficult depending on the shape of the intake / exhaust port cover 7, in which case chemical etching is used. The temperature of the exhaust from the cooking chamber 18 during cooking is high, but it does not exceed 450 ° C.

When the intake air passes through the intake / exhaust cover, dust contained in the indoor air and fine dust adhere to it, and when the exhaust passes, it is included in the cooking smoke (oil smoke, steam, carbide particles, odor components, etc.) from the cooking chamber 18. However, the surface of the ceramic coating A is soiled and non-adhesive to suppress the soiling, and the soiling can be easily removed during maintenance for cleaning the soiling.

A plate 6 is disposed in the center of the top plate 3, and a cooking container (not shown), which is an object to be heated, is placed on the plate 6 and cooking is performed. As the plate 6, crystallized glass, a ceramic plate, or the like is used. Fine unevenness is formed on the mounting surface of the plate 6, and a film of the ceramic coating A is formed. This is because when cooking is performed in the placed cooking container, the food in the cooking container scatters in the case of boiled cooking, and in the case of stir-fry or fried food cooking, it is splashed by splashing oil. This is because the mounting surface of 6 requires maintenance such as dirt cleaning.

Shot blasting or chemical etching is used to form fine irregularities. If shot blasting is used, the processing cost will be low, but depending on the strength and thickness of the crystallized glass or ceramic plate, it may be damaged due to impact during shot blasting, and processing may be difficult. In this case, it is necessary to use chemical etching. In the case of chemical etching, the processing cost is high, but finer irregularities can be made, and when a ceramic coating film is formed, a higher adhesion can be obtained and the smoothness of the film surface is increased. The aesthetics are improved, the cleanability is improved and the maintenance is improved.

A cooking container containing ingredients to be heated is placed on the plate 6, and cooking is performed by the induction heating coil 10 or the heater 11 disposed below. The temperature of the plate 6 by cooking is approximately 450 ° C. or less. For example, the temperature of the cooking container when grilling fish is about 175 to 200 ° C, but when grilling steak, it may be 300 to 375 ° C, and the coating containing PTFE cannot be used because it exceeds the heat resistant temperature of 260 ° C. It is less than the heat resistance temperature of the ceramic coating and can be used.
In the case of troubles such as product specifications / cooking conditions and emptying, the temperature may exceed 450 ° C. In such a case, the upper part of the induction heating coil 10 or the heater 11 is coated with coating B, etc. The position on which the object to be heated is placed may be clearly indicated as a film under different conditions such as color tone.

In addition, on the surface of the plate 6, there is a case where the position where the object to be heated is placed is clearly indicated, or a warning or warning is displayed to the user. In such a case, the solvent, pigment, After the display content is printed with ink containing etc., a highly transparent ceramic coating film is laminated.
The difference in heat-resistant temperature depending on the type of ceramic coating is that the ceramic coating A is 450 ° C., the ceramic coating B is 900 ° C., and the ceramic coating B is applied to the portion exceeding 450 ° C. Ceramic coating B has high heat resistance, but antifouling and non-adhesiveness is inferior to ceramic coating A. Therefore, by forming a film of ceramic coating A at a temperature of 450 ° C or lower, antifouling and non-adhesive Can be increased.

A top panel operating unit 5 is provided on the front side of the top panel frame 4 of the top panel 3. After forming fine irregularities on the outer surface side of the top frame 4 by chemical etching, a film of ceramic coating A is formed. Since the top frame 4 is away from the heating means, it does not exceed 450 ° C. The reason for using chemical etching is that the top plate frame 4 is a design surface and has a high appearance quality of the film, and a high frequency of cleaning and washing, and higher adhesion of the film.
A cooking chamber door 8 of the cooking chamber 18 is disposed in the front center of the main body 1, and a front operation unit 9 is provided on the front left and right.

FIG. 2 is a perspective view of the main body 1 with the plate 6 and the intake / exhaust port cover 7 of the cooking device removed.
An exhaust port 13 is provided in the center of the back side of the top plate frame 4, and an intake port 12 is provided on the left and right.
The air inlet 12 is connected to the inlet of the substrate case unit 15.
A cooking chamber exhaust air passage 14 is disposed at the exhaust port 13, and the exhaust from the cooking chamber 18 is exhausted together with the cooling air sent from the substrate case 15.
In a normal use state, the exhaust port 13 is covered with the intake / exhaust port cover 5.

Below the plate 6, induction heating coil units 10 are arranged on the left and right sides of the front side, and a heater 13 is arranged in the center of the back side. The induction heating coil unit 10 generates heat by heating the cooking container by induction heating, the heater generates heat by Joule heat, heats the cooking container by radiation and heat transfer through the plate 6, and performs cooking.
Below the induction heating coil unit 10 and the heater 11, there is a cooking chamber storage section 19.

FIG. 3 is a perspective view of the right substrate case unit 15. The configurations of the left and right substrate case units 15 are substantially symmetrical, and will be described using the right side. The substrate case unit 15 is provided with a cooling fan 17 and houses a control circuit board 16 on which electronic components are mounted.
The control board circuit 16 receives the instructions accompanying the operation from the top panel operation unit 5 and the front operation unit 9 and the output of the temperature sensor 24, and the heater 11, induction heating coil 10, cooking chamber 18 upper heater 20, lower heater 21, catalyst The heating means of the heater 26, the cooling fan 17 and the like are connected so that they can be controlled and driven.

The control circuit board 16 includes a part that becomes an object to be cooled that generates heat and needs to be cooled. Some of the control circuit boards 16 include a heat sink (cooling fin) in order to improve cooling efficiency.
The board case unit 15 is formed as an integrated air path from the inlet to the outlet, and when the cooling fan 23 operates to suppress the temperature rise of the mounted components, prevent damage and maintain the function of the circuit, Cooling air is sucked from the inflow port, passes through the cooling fan 17, cools the object to be cooled on the internal control circuit board 16, and then is sent out from the outflow port provided on the front surface side and arranged in the housing 2. After cooling the object to be cooled such as an induction heating coil, it is exhausted from the exhaust port 13

FIG. 4 is a perspective view showing the entire cooking device 18. A cooking chamber door 8 is disposed in front of the cooking chamber 18, and a cooking chamber exhaust air passage 14 is provided on the rear side.
FIG. 5 is a perspective view of the cooking chamber 18 with the ceiling surface and the cooking chamber door 8 removed. An opening connected to the cooking chamber exhaust air passage 14 is provided on the back surface of the cooking chamber 18. Temperature sensors 24 are provided on the front side of the side surface of the cooking chamber and above and below the back surface so that the temperature in the cabinet can be detected.
An upper heater 20 is disposed above the cooking chamber 18, a cooking table 22 on which an object is placed is disposed below the cooking chamber 18, a lower heater 21 is disposed below the cooking table 22, and a saucer 23 is disposed below the cooking heater 22.

In the present embodiment, the heating object placed on the cooking table 22 is heated at once from the vertical direction by the upper heating means 21 and the lower heating means 23, but the heating means is provided only above or below. In addition, the same cooking can be performed by reversing the top and bottom of the object to be heated, and the effect of the present invention can be obtained similarly regardless of the number and arrangement of the heating means.
In the present embodiment, the effect of the present invention can be obtained in the same manner by arranging a heater in a sheet shape on the ceiling surface or integrally forming a film heater on the ceiling surface.

FIG. 6 is a side sectional view of the cooking chamber 18 portion of the main body 1.
On the inner surface where cooking is performed in the cooking chamber 18, after fine concavo-convex is formed by shot blasting, the ceiling surface is coated with ceramic coating B, and the bottom, back, left and right sides, cooking chamber door 8 (inner surface side) The ceramic coating A is applied.
The type of coating is changed depending on the part due to the heat-resistant temperature, and the ceramic coating B is adopted because the ceiling surface above the heater exceeds 450 ° C.

The kitchen table 22 is coated with a ceramic coating A after forming fine irregularities by chemical etching. The reason why the etching is formed by chemical etching is that, since the cooking table is configured by combining thin wires, there is a portion where unevenness is not well formed by shot blasting. The operating temperature is approximately 450 ° C. or lower, but if the temperature exceeds 450 ° C. due to the specifications of the cooking chamber 18 or cooking conditions, a film is formed with the ceramic coating B.

The saucer 23 is formed with fine irregularities by shot blasting, and then a ceramic coating A is applied thereto. The operating temperature is approximately 450 ° C. or less, but if it exceeds 450 ° C. depending on the specifications of the cooking chamber 18 or cooking conditions, a film is formed with the ceramic coating B.
The upper heater 20 and the lower heater 21 are formed with fine irregularities by shot blasting and then coated with a ceramic coating B. This is because the heater surface exceeds 450 ° C.

A cooking chamber exhaust air passage 14 connected to the rear opening of the cooking chamber 18 has an L-shaped upper surface and is joined to the exhaust port 13.
The inner surface of the cooking chamber exhaust air passage 14 is formed with fine irregularities by shot blasting, and then a ceramic coating A is applied thereto. A catalyst 25 for purifying exhaust gas and a catalyst heater 26 for heating the catalyst 25 are provided in the cooking chamber exhaust air passage 14. The temperature of the catalyst is heated to 300-400 ° C, and the activity of the catalyst is increased to decompose and purify oil smoke and odor components contained in the exhaust by oxidative decomposition, and the heat resistance temperature of the ceramic coating A can generally exceed 450 ° C. However, if there is a place where the temperature exceeds 450 ° C. due to reaction heat or the like, the place and the periphery of the catalyst 25 and the catalyst heater 26 may be separately coated so as to form a film with the coating B.

FIG. 7 is a cross-sectional view of a film forming portion of the ceramic coating.
The ceramic coating of the present embodiment is a film having a three-dimensional crosslinked matrix structure having a siloxane bond by a sol-gel method. An example of a film having this structure is Thermolon Japan Co., Ltd., which is composed of components such as SiO ₂ , Al ₂ O ₃ , and TiO ₂ . Products corresponding to Coating A having a heat resistant temperature of 450 ° C. include Resistance, Expert, Rocks, and Resilience as products having a heat resistant temperature of 900 ° C. corresponding to Coating B. The main difference between products with a heat-resistant temperature of 450 ° C is selected according to the required specifications depending on the hardness and wear resistance of the film.

Compared with the coating containing PTFE, which is widely used for the purpose of adding antifouling property and non-adhesiveness, this coating has a heat resistance temperature higher than 260 ° C of PTFE, and does not contain PFOA, PTFE, VOC. There is an advantage that the film hardness of the film including PTFE is as high as 9H with respect to the pencil hardness H-2H.
Ceramic coating makes the coating surface of the base material 29 on which the film is applied a fine uneven surface 29, and the coating agent applied to the fine unevenness enters and cures as it is, with the anchoring effect (fastener effect, anchor effect), Increases adhesion.

When forming irregularities in shot blasting, good adhesion can be obtained by using an abrasive alumina 60 mesh or the like and having a surface roughness Ra1 to 4 μm.
When a shape that is difficult to be shot or blasted or a higher film adhesion / smoothness / good appearance is required, it is a surface having a roughness of 0.5 to 10 μm using chemical etching, and the surface is 5 When a shape covered with an ultrafine irregular surface having an irregular period of ˜500 nm is formed, a better film and adhesion can be obtained.

After coating the coating agent, it is baked at 180 to 310 ° C. to form a film having a thickness of 20 to 50 μm. Since the curing temperature of PTFC is cured at a temperature lower than about 400 ° C., there are advantages such as low heat resistance of the equipment and reduction in energy cost for firing.
The film may be used as a single layer or may be laminated with a highly transparent ceramic coating.

As for ceramic coating, a method to form irregularities is selected depending on the strength, shape, adhesion, and finish of each part, and a ceramic coating with a heat resistance specification higher than the operating temperature in the environment where each part is placed is selected to form a film This is as explained individually.

Next, the operation of the heating means of the cooking device will be described.
In the heating cooker configured as described above, when the top panel operation unit 5 or the front operation unit 9 is operated to instruct heating cooking, the control circuit board 16 is connected to the induction heating coil 10, the heater 11, or the cooking chamber. The heating means in 18 is controlled and driven, and cooking is performed. The operation of cooking by the induction heating coil 10 or the heater 11 for the cooking container or the like in which the food to be heated placed on the plate 6 of the top plate 3 is put is as already described individually.

The situation inside the cooking chamber during cooking in the cooking chamber 18 will be described.
In the cooking chamber 18, the object to be heated is controlled by the cooking menu selected by the top panel operation unit 5 or the front operation unit 9, and the upper heater 20 and the lower heater 21 are controlled, and the object to be heated placed on the cooking table 22 Is heated and cooked. The object to be heated may be a food material such as fish as it is, or may be a wrapped product or a cooking container.

In the present embodiment, the upper heater 20 and the lower heater 21 that are heating means of the cooking chamber 18 are sheathed heaters that generate heat by Joule heat. However, the heating means is not limited to this, and a carbon heater, a flat heater A heater such as a heater or a thin film heater formed integrally with the ceiling surface, radio wave heating using a magnetron, electromagnetic induction heating, or heating with superheated steam may be used, but the present invention is not limited thereto.
In the present embodiment, the cooking chamber 18 is a part of a combined cooking device, but the cooking chamber 18 may be an independent cooking device, such as a toaster, roaster, microwave oven, microwave oven, steam oven, Any one of a gas oven, a convection oven, or a plurality of heating means may be used, and the same effect can be obtained.

When cooking is performed in the cooking chamber 18, oily smoke and odor components are generated from the food that is to be heated, and the juice and fat from the food are scattered and volatilized in contact with the saucer 23 and the lower heater 21. Oil smoke and odor components are generated and diffused into the cooking chamber 18 and adhere to the tray 23 and the lower heater 21 and become dirty.
In addition, scattered sap and fat, part of the diffused smoke and odor components adhere to and adsorb on the inner surface of the cooking chamber 18 and the inner surface of the front door, thereby contaminating the inner surface.
In addition, oil smoke and odor components are exhausted from the back of the cooking chamber 18 to the cooking chamber exhaust air passage 14 and partially decomposed and purified by the catalyst 25 heated by the catalyst heater 26 to reduce the concentration. It passes through the passage 14 and is exhausted from the exhaust port 13 through the intake / exhaust cover 7 to the outside of the housing. At this time, oily smoke, odor components, etc. remaining on the inner surface of the cooking chamber exhaust air passage 14 and the intake / exhaust cover 7 are attached and contaminated.

Next, the parts that require maintenance such as cleaning and washing required after cooking and the position of the ceramic coating will be described.
Cooking chamber 18 inner surface, cooking chamber door 8 inner surface, upper heater 20, lower heater 21, cooking table 22, saucer 23, inner surface of cooking chamber exhaust air passage 14 and components constituting top plate 3 The top plate frame 4, the plate 6, and the air intake / exhaust port cover 7 are raised, and after these fine irregularities are formed by shot blasting or chemical etching according to the shape and strength of each part, A film of the ceramic coating A or the ceramic coating B having a heat resistant temperature corresponding to the temperature is formed.

In the heating cooker having the above-described configuration, the heating means of the heater 11, the upper heater 20, the lower heater 21, the induction heating coil 10, the cooking chamber 18 for performing cooking, and the top plate on which the cooking container for performing cooking is placed. 3, which constitutes the cooking chamber 18 and is disposed inside, the inner surface of the cooking chamber 18, the inner surface of the cooking chamber door 8, the cooking table 22, the saucer 23, the upper heater 20, the lower heater 21, and the cooking chamber exhaust Three-dimensional cross-linked matrix structure ceramic coating with fine undulations on the surface of the airflow path 14 and the top plate frame 4, plate 6, and intake / exhaust port cover 7 constituting the top plate 3 and having siloxane bonds by the sol-gel method Due to the formation of a film, the above-mentioned parts, which may be used at a temperature of 260 ° C. or higher where a film containing PTFE cannot be used, can be given antifouling properties and non-adhesive properties, and the PTFE film can be cleaned and improved Involved in the formation of It is excellent in maintainability and has good manufacturability because it is harder than PTFE coating, has excellent durability and has a lower curing temperature than PTFE coating, and the equipment and energy are low in cost. A durable and inexpensive cooking device can be obtained. The same effect can be obtained also in a hot plate or rice cooker in which a ceramic coating film is similarly formed on the inner surface of the cooking vessel and the heating means is provided below.

In addition, the surface to be coated is shot and blasted to form fine irregularities and the surface roughness is Ra1 ~ 4μm, which improves the adhesion of the ceramic coating film and suppresses the peeling of the film due to cleaning and cleaning. In addition, good maintainability can be maintained for a long time, and a cooking device having a long product life can be obtained. The same effect can be obtained also in a hot plate or rice cooker in which a ceramic coating film is similarly formed on the inner surface of the cooking vessel and the heating means is provided below.

In addition, it is a surface that has fine irregularities formed by chemical etching and has a roughness of 0.5 to 10 μm, and the surface is covered with an ultrafine irregular surface with an irregular period of 5 to 500 nm, and a ceramic coating By forming a film, unevenness is formed in the plate 6 that uses a crystallized glass plate or ceramic plate that is difficult to form unevenness due to insufficient strength and shot blasting, or in shot blasting. Antifouling and non-adhesive properties can be imparted to more parts such as the countertop 22 and the intake / exhaust port cover 7 where there are difficult shapes and parts, and the top plate frame 4 is coated with irregularities formed by shot blasting. It is possible to improve the appearance of the top board that can be seen by people, and to improve the cleanliness and cleanability of the top board that is frequently cleaned. To, since the adhesion both improved further improved durability, can be good maintenance property, and cooking excellent long life appearance quality is. The same effect can be obtained with a hot plate or rice cooker that has a coating of ceramic coating on the inner surface of a cooking vessel made of carbon, earthenware, porcelain, or other material that may be insufficient in strength. It is done.

In addition, since the method of forming fine irregularities differs depending on the type of parts, it is possible to achieve appropriate film adhesion and appearance for each part and part, and chemical etching with high processing costs for all parts Compared to the case, it is possible to obtain a low-cost heating cooker of appropriate quality by combining shot blasting.

In addition, because the heat resistance grade of the ceramic coating film is different depending on the type and location of the parts, the cooking chamber 18 ceiling surface where anti-fouling and non-adhesive properties cannot be imparted with coating A with a heat resistance temperature of 450 ° C The inside, upper heater 20, and lower heater 21 can be given antifouling and non-adhesive properties by using coating B with a heat-resistant temperature of 900 ° C. be able to.

Embodiment 2. FIG.
The second embodiment will be described with reference to FIGS. 1 to 7 which are the same as the first embodiment. Since the first embodiment differs from the first embodiment only in the control of the heating means and the kind of the coating film of the ceramic coating, the different parts are mainly described. In the first embodiment, the ceramic coating A, the ceramic coating B, and the film may be applied separately depending on the use temperatures of the parts and parts.
For example, in the plate 6, the portion where the non-heated object is placed above the heater 11 of the heating means and the induction heating coil 10 and the temperature around the portion may exceed 450 ° C. A film is formed.

Also, in the inner surface of the cooking chamber 18, the ceiling surface may exceed 450 ° C. due to a rise due to the buoyancy of air that has become hot or close to the upper heater 20, and the ceiling surface is formed with a ceramic coating B.
In the present embodiment, in heat cooking on the plate 6, a temperature sensor for detecting the temperature of the cooking container to be placed is provided below the plate to be heated and below the plate ( Not shown).

The temperature sensor uses a contact thermistor that contacts the bottom surface of the plate 6 and measures the temperature via the plate 6, and an infrared sensor that detects the amount of infrared rays emitted from the heated object and measures the temperature of the heated object There is a non-contact type using. Which type is to be mounted may be selected appropriately depending on the required measurement accuracy, responsiveness, and manufacturing cost, and the same operation and effect can be obtained with either type.

The control circuit board 16 measures the temperature of the object to be heated from the output of the temperature sensor, and the temperature of the ceramic coating on which the object to be heated is placed and contacts from the output of the sensor or the measured temperature of the object to be heated. The temperature is estimated by a predetermined conversion.
When the control circuit board 16 determines that the temperature of the ceramic coating film may exceed 450 ° C from the output of the temperature sensor, the heating means detected by the temperature sensor (either the heater 11 or the left and right induction heating coils 10) The output is controlled to be less than 450 ° C.
As a result, the temperature of the ceramic coating film can be made less than 450 ° C, and it can be prevented from exceeding 450 ° C even in troubles such as emptying of the object to be heated, and only with the ceramic coating A having a heat resistant temperature of 450 ° C. A film of the entire plate 6 is formed.

Similarly, in the cooking chamber 18, the temperature sensor 24 is provided on the back surface and the side surface, and from the output of the temperature sensor 24, the temperature of the coating of the ceramic coating applied to the inner surface of the cooking chamber 18 is less than 450 ° C. Since the outputs of the upper heater 20 and the lower heater 21 are controlled from the control circuit board 16, the coating on the inner surface of the cooking chamber 18 is formed only by the ceramic coating A.

In the present embodiment, the plate 6 and the inner surface of the cooking chamber 18 have been described as examples. However, if the heating means is controlled by the output of the temperature sensor, other parts / parts forming a ceramic coating film The same effect can be obtained, but the present invention is not limited to this.
Further, in the present embodiment, the upper heater 20 and the lower heater 21 that are heating means of the cooking chamber 18 are sheathed heaters that generate heat due to Joule heat, but the heating means is not limited to this, and the carbon heater The heater may be a flat heater, a thin film heater formed integrally with the ceiling surface, radio wave heating using a magnetron, electromagnetic induction heating, or heating by superheated steam, but is not limited thereto.
In the present embodiment, the cooking chamber 18 is a part of a combined cooking device, but the cooking chamber 18 may be an independent cooking device, such as a toaster, roaster, microwave oven, microwave oven, steam oven, The same effect can be obtained with either a gas oven or a convection oven, or with a plurality of heating means.

In the cooking device having the above-described configuration, the temperature sensor for the object to be heated placed on the plate 6 as the temperature sensor, the temperature sensor 24 for the cooking chamber 18, the top panel operating unit 5 as the operation panel, and the front panel operation. Unit 9 and a control circuit board 16 that is a control circuit, and an operation panel is operated and instructions accompanied by one or more operations of a heater 11 that is a heating means, an induction heating coil 10, an upper heater 20, and a lower heater 21 are made. In this case, the control circuit controls the heating means from the information of the temperature sensor, and controls the part on which the ceramic coating film is formed to be below the heat resistance temperature of the predetermined ceramic coating, so that a single film can be obtained. A ceramic coating with a low heat-resistant temperature that is superior in antifouling properties and non-adhesiveness as well as being able to form a coating at low cost, eliminating the need to separate coatings. Increased cleaning properties, washability by forming a film, can be a maintenance of good heating cooker at a low cost.

Embodiment 3 FIG.
Embodiment 3 will be described with reference to FIGS. Since the control of the cooling fan 17, the flow of cooling air, and the kind of the coating film of the ceramic coating differ from the first embodiment only in some parts / parts, different parts are mainly described.
In the first embodiment, the ceramic coating A, the ceramic coating B, and the film may be applied separately depending on the use temperatures of the parts and parts.
For example, on the inner surface of the cooking chamber 18, the ceiling surface may exceed 450 ° C. due to the rise due to the buoyancy of air that has become hot or close to the upper heater 20, and the ceiling surface forms a film with the ceramic coating B, The other inner surface is coated with a ceramic coating A.

In the present embodiment, the cooking chamber storage section ventilation opening 27 is provided on the ceiling surface and side surface of the seven cooking chamber storage section 19 shown in FIG. 8, and the cooling air sent from the cooling fan disposed in the substrate case unit 15 is used. Is allowed to flow into the space between the cooking chamber storage unit 19 and the cooking chamber 18 from the cooking chamber storage unit vent 27. In particular, the opening position / opening area of the cooking chamber storage section vent 27 is set and adjusted so that a flow of cooling air that cools the ceiling surface of the cooking chamber 18 is formed. Cooling of the ceiling surface of the cooking chamber 18 with cooling air reduces the coating temperature of the ceramic coating on the ceiling surface to less than 450 ° C of the ceramic coating A, and all coatings on the inner surface of the cooking chamber 18 are formed only with the ceramic coating A. ing.

In the present embodiment, the ceiling surface of the cooking chamber 18 has been described as an example. However, if the cooling fan 17 is provided and the cooling air is in contact with the part on which the ceramic coating film is formed, another ceramic coating film is used. The same effect can be obtained with respect to the formed parts and components, and the present invention is not limited to this.
Further, in the present embodiment, the upper heater 20 and the lower heater 21 that are heating means of the cooking chamber 18 are sheathed heaters that generate heat due to Joule heat, but the heating means is not limited to this, and the carbon heater The heater may be a flat heater, a thin film heater formed integrally with the ceiling surface, radio wave heating using a magnetron, electromagnetic induction heating, or heating by superheated steam, but is not limited thereto.

Further, in the present embodiment, the cooking chamber 18 is a part of the combined cooking device. However, the cooking chamber 18 includes a cooling fan when the cooking chamber storage unit 19 is an outer shell of the product, and includes the cooking chamber 18 and the outer shell. If the cooling air is flowing in the space, it will be the same as an independent heating cooker, and it will be a toaster, roaster, microwave oven, microwave oven, steam oven, gas oven, convection oven, or multiple heating means If the cooling air is in contact with the ceramic-coated part, the same effect can be obtained.

In the heating cooker having the above-described configuration, the cooling fan 17 is provided, and the ceramic coating film is formed by cooling the ceiling surface of the cooking chamber 18, which is a part on which the ceramic coating film is formed, by blowing air from the cooling fan 17. The formed parts are cooled so that they are below the heat resistance temperature of the specified ceramic coating, and it is possible to form a film at low cost without the trouble of coating the coating, and it is superior in antifouling and non-adhesive properties. By forming the film with A, the cleaning property / cleaning property is improved, and the cooking device can be inexpensive and has good maintainability.

Embodiment 4 FIG.
A fourth embodiment will be described with reference to FIGS. Since only the control of the cooling fan 17 and the flow rate of the cooling air accompanying the third embodiment are different from the third embodiment, the different portions are mainly described.
In the third embodiment, the cooling fan 17 is controlled regardless of the temperature of the coating of the ceramic coating A on the ceiling inner surface of the cooking chamber 18. Even when the air volume of the cooling fan 17 is controlled under the condition of a small air volume, since the air is introduced from the cooking chamber storage section vent 27 so as to be lower than the heat resistance temperature of the ceramic coating A, the cooling fan 17 is cooled. When the air volume of the fan 17 is controlled under the condition of a large air volume, the air volume to be guided is more than necessary and is overcooled, the heating efficiency in the cooking chamber 18 is reduced, and the upper heater 20 and the lower heater 21 are wasted. Must be increased, power consumption may increase, and cooking time may increase.

In the present embodiment, the temperature of the ceramic coating film applied to the inner surface of the cooking chamber 18 is estimated from the outputs of the temperature sensors 24 provided on the back and side surfaces of the cooking chamber 18 so that the temperature is less than 450 ° C. In addition, by controlling the air volume of the cooling fan 17 from the control circuit board 16, if the coating temperature of the ceramic coating on the inner surface of the cooking chamber 18 is likely to exceed the heat resistance temperature of the ceramic coating A, the cooling air volume is increased to a predetermined temperature. When it becomes below, useless cooling is suppressed by reducing the amount of cooling air.

In the present embodiment, the ceiling surface of the cooking chamber 18 has been described as an example. However, the cooling fan 17 is provided and the cooling air is in contact with the part on which the ceramic coating film is formed, and the temperature sensor 24 is provided and its output. If the cooling fan 17 is more controlled, the same operation and effect can be obtained for other parts and parts on which the ceramic coating film is formed, and the present invention is not limited to this.
In the present embodiment, the air volume of the cooling fan 17 is controlled by the output of the temperature sensor 24, but the upper heater 20 and the lower heater 21 may also be controlled as in the second embodiment. Thus, it is possible to make cooking with less power consumption and a short time.

Further, in the present embodiment, the upper heater 20 and the lower heater 21 that are heating means of the cooking chamber 18 are sheathed heaters that generate heat due to Joule heat, but the heating means is not limited to this, and the carbon heater The heater may be a flat heater, a thin film heater formed integrally with the ceiling surface, radio wave heating using a magnetron, electromagnetic induction heating, or heating by superheated steam, but is not limited thereto.
Further, in the present embodiment, the cooking chamber 18 is a part of the combined cooking device. However, the cooking chamber 18 includes a cooling fan when the cooking chamber storage unit 19 is an outer shell of the product, and includes the cooking chamber 18 and the outer shell. If the cooling air is flowing in the space, it will be the same configuration requirements as an independent heating cooker, either toaster, roaster, microwave oven, microwave oven, steam oven, gas oven, convection oven, or multiple heating means If the cooling air is in contact with the ceramic-coated part, the same effect can be obtained.

The heating cooker having the above configuration includes the cooling fan 17 and, by blowing air from the cooling fan 17, cools the ceiling surface of the cooking chamber 18, which is a part on which the ceramic coating film is formed, and operates with the temperature sensor 24. It is equipped with a top panel operation section 5 that is a panel, a front operation section 9, and a control circuit board 16 that is a control circuit, and the operation panel is operated and accompanied by the operation of one or more of the upper heater 20 and the lower heater 21 that are heating means. When instructed, the control circuit controls the cooling fan 17 from the output of the temperature sensor 24, and controls the amount of cooling air so that the part on which the ceramic coating film is formed is less than the predetermined heat resistance temperature of the ceramic coating. The film can be formed as a single film, eliminating the need to separate the coatings, and can be formed at low cost. By forming a film with the superior ceramic coating A, the cleanability and detergency increase, and the cooking chamber 18 is not cooled more than necessary, so that the amount of electric power required for cooking can be reduced and the cooking time can be shortened. It can be used as a cooking device that is inexpensive, has good maintainability, saves energy, and cooks for a short time.

The present invention can be used for commercial and household cooking devices.

1 Main body, 2 housing, 3 top plate, 4 top plate frame, 5 top plate operation section, 6 plate,
7 Intake / exhaust port cover, 8 Cooking chamber door, 9 Front operation part, 10 Induction heating coil,
11 Heater, 12 Intake port, 13 Exhaust port, 14 Cooking room exhaust air passage,
15 substrate case unit, 16 control circuit board, 17 cooling fan,
18 Cooking room, 19 Cooking room storage, 20 Upper heater, 21 Lower heater,
22 Cooking table, 23 saucer, 24 temperature sensor, 25 catalyst, 26 catalyst heater,
27 Ventilation port for cooking chamber, 28 base material, 29 uneven surface,
30 Ceramic coating

Claims (8)

Equipped with any heating means of heating, magnetron, induction heating coil and cooking room, cooking table, saucer, cooking container, top plate, cooking room, cooking table, saucer, cooking container, top plate The surface of the components that make up any one of the heater, exhaust air passage, and intake / exhaust port cover was provided with fine irregularities, and a ceramic coating film with a three-dimensional crosslinked matrix structure with siloxane bonds was formed by the sol-gel method. A heating cooker featuring. 2. The cooking device according to claim 1, wherein the fine irregularities are formed by shot blasting and have a surface roughness Ra1 to 4 [mu] m. The fine irregularities are surfaces formed by chemical etching and having a roughness of 0.5 to 10 μm, and the surface is covered with an ultrafine irregular surface having an irregular period of 5 to 500 nm. The cooking device according to claim 1. The cooking device according to any one of claims 1 to 3, wherein the means for forming fine irregularities differs depending on the type of component. The cooking device according to any one of claims 1 to 4, wherein the heat-resistant grade of the ceramic coating film varies depending on the type of component and the position where the component is disposed. A component that has a temperature sensor, an operation panel, and a control circuit, and when the operation panel is operated and an instruction accompanied by the operation of the heating means is performed, the control circuit controls the heating means from the information of the temperature sensor, and the ceramic coating film is formed The cooking device according to any one of claims 1 to 5, wherein the temperature is controlled to be equal to or lower than a predetermined temperature. The heating cooker according to any one of claims 1 to 6, further comprising a cooling fan, wherein the component on which the ceramic coating film is formed is cooled by blowing air from the cooling fan. A component that has a temperature sensor, an operation panel, and a control circuit. When the operation panel is operated and an instruction accompanied by the operation of the heating means is given, the control circuit controls the cooling fan from the information of the temperature sensor, and the part on which the ceramic coating film is formed The cooking device according to claim 7, wherein the temperature is not more than a predetermined temperature.

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