JP2005114229A - Cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein securing performance of an infrared sensor is difficult when an operation ambient temperature is high. <P>SOLUTION: Recessed parts 30 are provided in a circulation fan chamber 25 and a heat insulating plate 26, a sensor mounting plate 29 is fixed to a recessed part 30 provided in a rear upper part of a heating chamber 22, and the infrared sensor 28 is installed on the sensor mounting plate 29. By this, the infrared sensor 28 is efficiently cooled, an ambient temperature can be maintained at a temperature or below guaranteed for operation of the infrared sensor 28, and its performance can be easily secured. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cooking device to which an infrared sensor is attached.

  Conventionally, in this type of cooking device, the infrared sensor is installed on the upper surface of the heating chamber.

  FIG. 9 shows a conventional cooking device described in Patent Document 1. As shown in FIG.

As shown in FIG. 9, the cooking chamber 1, the perforated window 11 provided on the upper surface of the cooking chamber 1, the food temperature detecting means 5 installed on the upper surface of the cooking chamber 1, the cooking means 4, and the control means 6 are determined. It is comprised from the means 8, the drive means 9, and the shielding means 10 (for example, refer patent document 1).
Japanese Patent Laid-Open No. 06-193883

  However, in the conventional configuration, the food temperature detection means 5, the control means 6, the determination means 8, the drive means 9, the shielding means 10, and the opening window 11 are arranged on the upper surface of the cooking chamber 1. Since the temperature detection means 5, the control means 6, the determination means 8 and the drive means 9 are composed of electronic parts, the cooking means 4 can be a high frequency or a heater when arranged on the upper surface of the cooking chamber 1 which is high in temperature. Since various means must be taken in order to satisfy each electronic component, it is difficult to design. Especially when the cooking means 4 is a heater, it is almost impossible.

  Further, since the shielding means 10 is in direct contact with the upper surface of the cooking chamber 1 and is disadvantageous in terms of heat transfer, a heat-resistant material must be used and is limited when selecting the material.

  Further, since the opening window 11 is on the upper surface of the cooking chamber 1, if the cooking means 4 has a high frequency, the heat will rise upward in the case of a heater, so that direct hot air is blown out and hot air treatment is very difficult. It had the problem that.

  This invention solves the said conventional subject, and it aims at providing the heating cooker which takes heat insulation means and performs operation | movement of an infrared sensor stably.

  In order to solve the above-described conventional problems, a heating cooker according to the present invention includes a heating chamber that contains food, a circulation fan that stirs air in the heating chamber, a heater that heats the heating chamber, and the circulation fan. A circulation fan chamber that houses the heater, a heat insulating plate that shields heat generated in the circulation fan chamber, a cooling fan that is provided outside the heat insulation plate and cools the heat insulation plate, and the heating chamber; A partition plate for isolating the circulation fan chamber; temperature detection means for detecting the temperature of the food (hereinafter referred to as an infrared sensor); and a sensor mounting plate fixed to the partition plate at the same time as fixing the infrared sensor. The circulation fan chamber and the heat insulating plate are provided with a recess, a sensor mounting plate is fixed to the recess, and an infrared sensor is installed on the sensor mounting plate.

  As a result, the recess serves as a guide, and the cooling air blown from the cooling fan can be collected and efficiently applied to the infrared sensor.

  As a result, the ambient temperature can be kept below the temperature at which the operation of the infrared sensor is guaranteed, and the performance can be easily ensured.

  The cooking device of the present invention can efficiently cool the infrared sensor and stabilize the performance.

  The first invention includes a heating chamber that contains food, a circulation fan that stirs the air in the heating chamber, a heater that heats the air in the heating chamber, a circulation fan chamber that houses the circulation fan and the heater, and a circulation fan chamber A heat insulating plate that shields the heat generated in the air, a cooling fan that is provided outside the heat insulating plate and cools the heat insulating plate, a partition plate that separates the heating chamber and the circulation fan chamber, and detects the temperature of the food It is equipped with an infrared sensor that can obtain a two-dimensional thermal image that realizes cooking at an appropriate temperature, and a sensor mounting plate that is fixed to the partition plate at the same time that the infrared sensor is fixed. By fixing the sensor mounting plate in the recess provided in the upper rear of the chamber and installing an infrared sensor on the sensor mounting plate, the recess serves as a guide for collecting cooling air and is sent from the cooling fan. Collect cooling air to be cooled efficiently addressed to the infrared sensor, can hold ambient temperature below the temperature at which the infrared sensor is operated security, it is easy to ensure performance.

  The second invention particularly reduces the radiant heat of the circulation fan chamber by incorporating a heat insulating material on three surfaces between the recesses provided in the circulation fan chamber and the heat insulating plate of the heating cooker of the first invention. As a result, the ambient temperature of the infrared sensor can be further reduced, and the performance of the infrared sensor can be ensured.

  The third aspect of the invention is a part for attaching the infrared sensor to the sensor attachment plate by providing a hole in the sensor attachment plate of the heating cooker of the first to second inventions to reduce heat transfer from the partition plate. Since the temperature can be reduced, it is possible to widen the range of material selection, and it is possible to select a material that does not cost, thereby reducing the cost.

(Embodiment 1)
FIG. 1 is a perspective view showing a combination of main components of a heating cooker according to the first embodiment of the present invention, FIG. 2 and FIG. 3 are sectional views of essential parts, and FIG. 4 is a cross-sectional view of the circulation fan chamber, and FIG. 5 is a front view of the circulation fan chamber.

  1, 2, 3, 4, and 5, a heating chamber 22 that contains food 21, a circulation fan 23 that stirs the air in the heating chamber 22, and a heater that heats the air in the heating chamber 22. 24, a circulation fan chamber 25 that houses the circulation fan 23 and the heater 24, a heat insulating plate 26 that shields heat generated in the circulation fan chamber 25, and a heat insulating plate 26 that is provided outside the heat insulating plate 26 to cool the heat insulating plate 26. A cooling fan 27, a partition plate 33 that separates the heating chamber 22 and the circulation fan chamber 25, an infrared sensor 28 that can detect the temperature of the food 21 and obtain a two-dimensional thermal image for realizing appropriate temperature cooking, and an infrared sensor 28, a sensor mounting plate 29 fixed to the partition plate 33 at the same time, a recess 30 is provided in the circulation fan chamber 25 and the heat insulating plate 26, and a sensor is mounted in the recess 30 provided in the rear upper part of the heating chamber 22. Paste plate 29 is fixed, it is installed an infrared sensor 28 to the sensor mounting plate 29.

  About the cooking-by-heating machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the circulation fan chamber 25 and the heat insulating plate 26 are provided with a recess 30, the sensor mounting plate 29 is fixed to the recess 30 provided in the upper rear portion of the heating chamber 22, and the infrared sensor 28 is installed on the sensor mounting plate 29. The concave portion 30 serves as a guide for collecting the cooling air, and the cooling air blown from the cooling fan 27 is collected and can be efficiently cooled by being applied to the infrared sensor 28. At this time, as shown in FIG. 2, since the infrared sensor 28 detects the temperature of the food 21 through the hole 32 of the partition plate 26, a viewing angle 34 is required. Although hot air is trapped in the upper space, the thermal influence can be reduced by installing it on the rear surface of the partition plate 33. Furthermore, in order to ensure the viewing angle of the infrared sensor 28, it is only necessary to be close to the hole 32 of the partition plate 33. However, heat transfer from the partition plate 33 and heat leakage from the hole 32 are thermally disadvantageous. In terms of heat transfer, the infrared sensor 28 is fixed to the sensor mounting plate 29 to mitigate heat transfer from the partition plate 33. In terms of heat leakage, the wind of the cooling fan 27 follows the heat insulating plate 26 due to the creeping effect. Collected by the recess 30, the hot air leakage from the hole 32 is blown away, and the thermal influence on the infrared sensor 28 is reduced.

  As described above, in the present embodiment, the circulation fan chamber 25 and the heat insulating plate 26 are provided with the recess 30, and the sensor mounting plate 29 is fixed to the recess 30 provided in the rear upper part of the heating chamber 22. If the infrared sensor 28 is installed at 29, the infrared sensor 28 can be efficiently cooled, the ambient temperature can be kept below the temperature at which the operation of the infrared sensor 28 is guaranteed, and the performance can be easily ensured.

(Embodiment 2)
FIG. 6: is principal part sectional drawing of the cooking device of the 2nd Embodiment of this invention.

  In FIG. 6, a heat insulating material 39 is incorporated between the three surfaces of each recess 38 provided in the circulation fan chamber 36 and the heat insulating plate 37.

  About the cooking-by-heating machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the ambient temperature during operation of the infrared sensor 40 increases from the circulation fan chamber 36 due to the influence of radiant heat. By providing the heat insulating material 39 between the heat insulating plate 37 and the radiant heat, it is possible to further reduce the ambient temperature of the infrared sensor 40 by reducing the radiant heat, and the performance of the infrared sensor 40 can be ensured.

  As described above, in the present embodiment, by incorporating the heat insulating material 39 into the three surfaces between the recesses 30 provided in the circulation fan chamber 36 and the heat insulating plate 37, the radiant heat of the circulation fan chamber 36 is reduced. Thus, the ambient temperature of the infrared sensor 40 can be further reduced, and the performance of the infrared sensor 40 can be ensured.

(Embodiment 3)
FIG. 7 is a cross-sectional view of a main part of a cooking device according to the third embodiment of the present invention, and FIG. 8 is a perspective view of a sensor mounting plate.

  7 and 8, the sensor mounting plate 46 is provided with a ventilation hole 47.

  About the cooking-by-heating machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, heat is transmitted from the partition plate 33 to the infrared sensor 48 via the sensor mounting plate 46 to the infrared sensor 48. Therefore, the ventilation holes 47 are provided in the sensor mounting plate 46 to reduce heat transfer from the partition plate 33.

  As described above, in the present embodiment, the temperature of the portion where the infrared sensor 48 is attached to the sensor attachment plate 46 is reduced by providing the ventilation holes 47 in the sensor attachment plate 46 to reduce the heat transfer from the partition plate 33. Therefore, it is possible to widen the range of material selection, and it is possible to select a material that does not cost, thereby reducing the cost.

  As described above, the heating cooker according to the present invention can easily reduce the ambient temperature of the sensor by providing a recess in the heat source and the heat insulating plate. It can also be applied to applications.

The perspective view which shows the combination of the main components of the heating cooker in Embodiment 1 of this invention. Sectional drawing of the principal part of the heating cooker in Embodiment 1 of this invention Sectional drawing of the principal part of the heating cooker in Embodiment 1 of this invention Sectional drawing of the circulation fan chamber of the heating cooker in Embodiment 1 of this invention The front view of the circulation fan chamber of the heating cooker in Embodiment 1 of this invention Sectional drawing of the principal part of the heating cooker in Embodiment 2 of this invention Sectional drawing of the principal part of the heating cooker in Embodiment 3 of this invention The perspective view of the sensor attachment plate of the heating cooker in Embodiment 3 of this invention Cross-sectional view of a conventional cooking device

Explanation of symbols

DESCRIPTION OF SYMBOLS 21 Food 22 Heating chamber 23 Circulation fan 24 Heater 25, 36 Circulation fan chamber 26, 37 Thermal insulation board 27 Cooling fan 28, 40, 48 Infrared sensor 29, 46 Sensor mounting plate 30 Recessed part 32 Hole 33 Partition plate 34 Viewing angle 47 Ventilation hole

Claims (3)

Generated in the heating chamber for containing food, the circulation fan for stirring the air in the heating chamber, the heater for heating the heating chamber, the circulation fan chamber for housing the heater, and the circulation fan chamber A heat insulating plate that shields heat, a cooling fan that is provided outside the heat insulating plate and cools the heat insulating plate, a partition plate that separates the heating chamber and the circulation fan chamber, and a temperature of the food are detected. A temperature detecting means (hereinafter referred to as an infrared sensor) and a sensor mounting plate fixed to the partition plate at the same time as the infrared sensor is fixed; a recess is provided in the circulation fan chamber and the heat insulating plate; A cooking device, wherein a sensor mounting plate is fixed and an infrared sensor is installed on the sensor mounting plate. The heating cooker according to claim 1, wherein a heat insulating material is incorporated between the recesses provided in the circulation fan chamber and the heat insulating plate. The cooking device according to claim 1 or 2, wherein a hole is provided in the sensor mounting plate.

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