JP5097524B2 - Anti-stain mat for electromagnetic cookers - Google Patents

Description

  The present invention relates to an anti-stain mat for an electromagnetic cooker, and more particularly to an anti-stain mat for an electromagnetic cooker that does not allow dirt or blown spillage on the bottom of a pan to be heated to adhere to the top plate of the electromagnetic cooker.

  When cooking with an electromagnetic cooker, the pan is used directly placed on the top plate of the electromagnetic cooker, so dirt on the bottom of the pan and cooking splashes adhere to the top plate. There was a problem to do.

  In order to prevent the above situation, a dirt prevention mat used between the top plate of the electromagnetic cooker and the bottom of the pan is used.

  FIG. 3 is a plan view showing a schematic shape in a state in which the antifouling mat is used on a cooking heating apparatus incorporating a normal electromagnetic cooker, and FIG. 4 is a IV-IV shown in FIG. It is sectional drawing of a line, Comprising: It is the figure which showed the structure of the electromagnetic cooker typically.

  With reference to these figures, the top plate 17 of the cooking heating device 61 is provided with an electromagnetic cooker 13a and an electromagnetic cooker 13b on the left and right sides in front. Further, a heating wire heater 63 in which a nichrome wire is incorporated on the lower surface of the top plate 17 is installed behind the top plate 17. Further, an intake / exhaust panel 65 is disposed on the back side of the top plate 17.

  The figure shows a state in which a dirt prevention mat 51 made of heat-resistant glass having magnetic permeability and heat resistance with respect to the electromagnetic cooker 13b is arranged, and a pan 19 to be heated is further arranged thereon. . Then, with reference to FIG. 4, the schematic structure of an electromagnetic cooker and its heating principle are demonstrated easily.

  A magnetic force generating coil 14 constituting an electromagnetic cooker 13b is disposed below the top plate 17. When a current flows by turning on a switch (not shown) in the magnetic force generating coil 14, a magnetic force line 15 as shown by a two-dot chain line is generated around the magnetic force generating coil 14. The magnetic field lines 15 pass through the top plate 17 and the antifouling mat 51 and further pass through the bottom of the pan 19 placed on the top plate 17 to form a loop. Since the pan 19 is made of a material having a predetermined conductivity, an eddy current 16 is generated at the bottom of the pan as the magnetic field lines 15 are generated. The eddy current 16 generated in this way is replaced by heat by the electrical resistance of the pan bottom of the pan 19 and the temperature of the pan bottom rises. Thereby, the food stored in the pan 19 is heated without passing through the fire.

  When energization of the magnetic force generating coil 14 is stopped, the magnetic lines 15 disappear, and thereby the eddy current 16 generated at the bottom of the pan 19 also disappears. As a result, the temperature at the bottom of the pan 19 is lowered, and the heating state is ended.

  Due to its use, the dirt prevention mat 51 is kept in a beautiful state without being directly attached to the top plate 17 even when dirt is attached to the bottom surface of the pan 19 or when the cooking splashes. The effect which does not need the effort of etc. is produced.

  FIG. 5 is an enlarged perspective view showing a schematic shape of the antifouling mat 51 shown in FIG.

  Referring to the figure, the dirt prevention mat 51 has a configuration in which a heat-resistant glass plate is cut out in a circle. Therefore, although a certain thickness or more is required in terms of strength, the use of the electromagnetic cooking device may be affected by the heat insulation action.

  Returning to FIG. 4, a temperature sensor 18 is attached below the top plate 17. The temperature sensor 18 monitors the temperature of the top plate 17, and when the temperature of the top plate 17 rises abnormally due to airing or the like, the power supply is cut off by a control device (not shown) to stop heating. is there. Since the temperature of the top plate 17 changes when the temperature of the pan 19 is transmitted, there is a possibility that the detected temperature does not sufficiently follow the temperature of the pan 19 depending on the thermal resistance of the dirt prevention mat 51 installed between them. is there. For this reason, a problem may occur in the control by the temperature sensor 18.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide an anti-stain mat for an electromagnetic cooker that is less likely to affect the measurement of the temperature sensor of the electromagnetic cooker by use. .

In order to achieve the above object, the invention according to claim 1 is used by being sandwiched between a top plate of an electromagnetic cooker having a temperature sensor attached below and a bottom surface of a pan heated by the electromagnetic cooker. The anti-stain mat for an electromagnetic cooker is used to cover the upper side of the temperature sensor, and is made of a heat-resistant sheet body having permeability of magnetic field lines, and the thermal resistance of the sheet body is 2.05 × 10 ⁻³ (m ² · K) / W It is characterized by the following.

If comprised in this way, since the temperature of a pan will become easy to be transmitted to a top plate via the antifouling mat | matte for electromagnetic cookers , the influence which it has on the temperature sensor which detects the temperature of a top plate will decrease.

  The invention according to claim 2 is the structure of the invention according to claim 1, wherein the sheet body is made of heat-resistant fibers, and is formed on both surfaces of the sheet-like material having permeability of magnetic field lines, It consists of a coating material having non-water permeability.

  If comprised in this way, while becoming a cushioning dirt prevention mat | matte, both surfaces become a surface which has water-impermeable property.

  According to a third aspect of the present invention, in the configuration of the second aspect of the present invention, the material includes glass fiber.

  According to a fourth aspect of the present invention, in the configuration of the second or third aspect of the present invention, the coating material includes a silicone coating material.

  If comprised in this way, the surface of a stain | pollution | contamination prevention mat will have characteristics, such as slip resistance, heat resistance, and water repellency.

As described above, the invention according to claim 1 has less influence on the temperature sensor that detects the temperature of the top plate because the temperature of the pan is easily transmitted to the top plate via the anti-stain mat for an electromagnetic cooker. Do Ri, a possibility that malfunction during use of the electromagnetic cooker occurs is reduced.

  In addition to the effect of the invention of claim 1, the invention of claim 2 is a cushioning antifouling mat, so there is a risk of damaging or cracking the top plate or pan of the electromagnetic cooker during use. This is an anti-smudge mat that is easy to handle. In addition, since both surfaces are non-permeable surfaces, it is possible to prevent the liquid due to spilling or the like from passing through the antifouling mat during use and preventing the top plate of the electromagnetic cooker from becoming dirty.

  In addition to the effect of the invention described in claim 2, the material described in claim 3 includes a glass fiber, so that a dirt prevention mat excellent in heat resistance, impact resistance, flexibility, and cost is realized. The

  In addition to the effects of the invention of claim 2 or claim 3, the surface of the dirt prevention mat has characteristics such as slip resistance, heat resistance, water repellency and the like. An easy-to-use antifouling mat is realized.

  FIG. 1 is an enlarged perspective view showing a schematic shape of an anti-smudge mat for an electromagnetic cooker according to a first embodiment of the present invention, and FIG. 2 is an enlarged sectional view taken along the line II-II shown in FIG.

  Referring to these drawings, the anti-stain mat 9 is obtained by cutting out a circular woven fabric 23 made of glass fiber having permeability of magnetic field lines on both surfaces of a non-permeable silicone coat 24a and 24b. There is a sheet body 11. The outer peripheral edge of the sheet body 11 is edged by a bias tape or the like (not shown) having a U-shaped cross section over the entire periphery, but such an edge is not necessarily required.

  Since the dirt prevention mat 9 configured as described above uses the woven fabric 23 as the central material, the dirt prevention mat 9 is a dirt prevention mat having cushioning properties. Further, since the water-impermeable silicone coats 24a and 24b are provided on both surfaces, the eyes of the woven fabric 23 are filled with these, and the entire anti-smudge mat 9 has water-impermeable properties, so that the dirt is woven. 23 is prevented from reaching the inside.

  That is, when the dirt prevention mat 9 is placed on the top plate 17 of the electromagnetic cooker 13 as shown in FIG. 4 and the pan 19 is placed on the top, the dirt and dishes attached to the bottom of the pan 19 are used. In addition to the effect of preventing honey and the like from directly adhering to the top plate 17, because of the cushioning properties described above, there is no risk of damaging the top plate 17 or pan 19 during use, and there is no risk of cracking. The anti-staining mat is easy to handle.

  In addition, since the woven fabric 23 made of glass fiber is a material excellent not only in cushioning properties but also in heat resistance and impact resistance, the reliability during use is further improved, and it is also an inexpensive material. It becomes a dirt prevention mat excellent in cost.

  Further, the silicone coats 24a and 24b on the surface of the antifouling mat 9 have heat resistance, so there is no risk of denaturation or melting during cooking, and the anti-slip property to the bottom surface of the pan 19 and the top plate 17 is provided. Because it demonstrates it, it is easier to use.

  Further, since the silicone coats 24a and 24b have water repellency, not only there is no risk of liquid dirt penetrating into the woven fabric 23, but it can be easily washed with water. Use is possible.

  Next, an experiment was conducted to examine the degree of influence on the temperature sensor due to the thermal resistance of the dirt prevention mat 9.

  Samples were prepared for the experiment as follows.

実施例１、実施例２及び比較例１におけるシリコーン樹脂の塗布量は、いずれもガラス繊維の両面の各々に対して７０ｇ／ｍ^２とした。

The coating amount of the silicone resin in Example 1, Example 2, and Comparative Example 1 was 70 g / m ² for each of both surfaces of the glass fiber.

  The thermal resistance in the table is calculated by the following equation based on the thermal conductivity measured for each sample and the measured thickness of each sample.

Thermal resistance (m ² · K) / W = Thickness (m) ÷ Thermal conductivity (W / m · K)
The thermal conductivity was measured as follows.
Measurement method: ASTM E 1530 (steady heat flow meter method)
Measuring device: thermal conductivity measuring device (manufactured by ULVAC-RIKO, Inc .: GH-1)
Test temperature: 50 ° C

Next, the influence on the electromagnetic cooker in the use state for each sample was measured.
(1) Specifications of equipment used for measurement Electromagnetic cooker: Cooking heater (Mitsubishi Electric: CS-G3205BDS)
Hot pot: Dedicated tempura hot pot: Pot diameter 22cm (Uruyama Metal Industry Co., Ltd .: CS-100657)
Oil: Nissin Salad Oil (Nisshin Oillio Group)
Oil temperature measuring device: Infrared radiation thermometer (manufactured by Sato Keiki Co., Ltd .: SK-8700II)
(2) Measurement content-1
Each sample is set between a pan and a top plate, and 200 cc of salad oil is put in the pan and heated by a “fried food function”. The “fried food function” means a function in which the temperature sensor detects the heat of the heated pan through the top plate and adjusts the heating amount based on the detected temperature to keep the oil temperature at approximately 200 ° C.

  In the electromagnetic cooker used, the amount of oil that can be used safely is 500 cc or more. Therefore, the oil amount of 200 cc this time is not an appropriate usage amount.

(3) Measurement result-1
The measurement results are as follows.

The following contents were found from the measurement results.
The reference example can be said to be a state in which the antifouling mat is not used, that is, an original use state of the electromagnetic cooker. In this example, the heating was forcibly stopped after 2 minutes. This is because the amount of oil held in the pan is judged to be low from the viewpoint of safety and based on the degree of increase in the temperature detected by the temperature sensor within a predetermined time after heating.

  Even in Example 1 and Example 2, the heating was forcibly stopped after 2 minutes, as in the reference example. According to this result, the thermal resistance of the mat in Example 1 and Example 2 has little influence on the temperature sensor, and it can be considered that there is no substantial difference compared to use in the state without the mat.

On the other hand, in Comparative Example 1 and Comparative Example 2, heating is not stopped even after 2 minutes have elapsed, and the heating state continues. Therefore, the temperature of the oil held in the pan further rises, and heating does not stop even when the temperature exceeds 200 ° C. This seems to be due to the fact that the temperature sensor located below the top plate is affected by the heat-insulating action of the antifouling mat, and the measured value is lower than the actual temperature of the top plate. . Therefore, it can be said that the antifouling mat having the heat resistance that brings about such a state is not suitable for use although it exhibits the antifouling effect.
(4) Measurement content-2
Each sample is set between a pan and a top plate, and 500 cc of salad oil is put in the pan and heated by a “fried food function”.

  In the electromagnetic cooker used, the amount of oil that can be used safely is 500 cc or more. Therefore, the current oil amount of 500 cc is an appropriate amount to be used.

(3) Measurement result-2
The measurement results are as follows.

The following contents were found from the measurement results.
Regardless of the usage situation of each sample, there was no forced stop of heating and it continued to operate.

  In the reference example, which is the original use state, the oil temperature of about 194 ° C. is maintained after 5 minutes, and it is found that appropriate temperature control is performed as a deep-fried food function.

  In both Example 1 and Example 2, the oil temperature is maintained around 200 ° C. after 6 minutes. Compared to the reference example, the oil temperature is slightly higher and it takes more time to reach it, but it can be said that there is no problem in practical use.

  On the other hand, Comparative Example 1 and Comparative Example 2 reach 200 ° C. after 5 minutes, and the temperature is further increased thereafter. This means that temperature control as a deep-fried food function is not performed, and a safety problem arises.

  From the above, it can be said that the thermal resistance of the antifouling mat is a factor that greatly affects the operating state of the electromagnetic cooker, and its presence is meaningful when it is properly selected.

In the first embodiment, the material and shape of the antifouling mat are specified, but the thermal resistance is 2.05 × 10 ⁻³ (m ² · K) / W. The following effects can be obtained with other materials and other shapes as described below.

  In the first embodiment, a woven fabric made of glass fiber is used as a material. However, for example, a non-woven fabric other than a woven fabric made of glass fiber may be used, and carbon fiber or ceramic fiber may be used. For example, a woven fabric or a non-woven fabric made of other fibers having at least magnetic permeability and cushioning properties may be used.

  Furthermore, in the first embodiment, the silicone coating material is used as the coating material, but other members having at least water permeability and elasticity may be used. The coating material preferably has permeability of magnetic field lines, but even if it is non-permeable at a predetermined thickness or more, it can be used in the same manner as long as it can ensure permeability at the construction thickness.

  Furthermore, in the first embodiment, the antifouling mat has a circular shape, but may have other shapes such as a rectangular shape or a donut shape other than the circular shape.

It is the expansion perspective view which showed schematic shape of the stain | pollution | contamination prevention mat for electromagnetic cookers by 1st Embodiment of this invention. It is an expanded sectional view of the II-II line shown in FIG. It is the top view which showed the external appearance state in the state which used the conventional anti-stain mat | matte for electromagnetic cookers in the heating apparatus for cooking incorporating an electromagnetic cooker. It is a figure corresponding to the IV-IV line shown in FIG. 3, Comprising: It is sectional drawing which showed typically the operating principle of the electromagnetic cooker. FIG. 5 is an enlarged perspective view showing a schematic shape of the conventional anti-stain mat for an electromagnetic cooker shown in FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 9 ... Anti-stain mat | matte 11 ... Sheet | seat body 13 ... Electromagnetic cooker 15 ... Magnetic field line 17 ... Top plate 19 ... Pan 23 ... Woven cloth 24 ... Silicone coat In addition, the same code | symbol in each figure shows the same or an equivalent part.

Claims (4)

In the anti-stain mat for an electromagnetic cooker used by being sandwiched between the top plate of the electromagnetic cooker to which the temperature sensor is attached and the bottom of the pan heated by the electromagnetic cooker,
It is used so as to cover the upper side of the temperature sensor, and consists of a heat-resistant sheet body having permeability of magnetic field lines,
The thermal resistance of the sheet body is 2.05 × 10 ⁻³ (m ² · K) / W. An anti-stain mat for an electromagnetic cooker, characterized in that: The sheet body is
A sheet-like material composed of heat-resistant fibers and having permeability of magnetic field lines;
The antifouling mat according to claim 1, wherein the antifouling mat is formed on both surfaces of the material and has a water-impermeable coating material. The antifouling mat for an electromagnetic cooker according to claim 2, wherein the material includes glass fiber. The antifouling mat for an electromagnetic cooker according to claim 2 or 3, wherein the coating material includes a silicone coating material.

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