JP2005351566A - Heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating cooker with infrared detecting elements for detecting the temperature of foods, the infrared detecting elements having a tight viewing field and requiring a smaller space. <P>SOLUTION: An infrared sensor 39 formed with the plurality of infrared detecting elements 43 arranged in one line on a mounting board 41 is mounted on an output shaft 51 of a motor 38 in an inclined condition. Further, an inclined face 32, a boss portion 33 on the inclined face 32 and a window 34 at the upper part of the boss portion 33 are formed at a sharpness portion on the upper part rear side of an inner box 3 having a heating chamber 4 inside and the motor 38 is mounted on a casing mounting member 36 fixed to the inclined face 32 with the output shaft 51 to be almost horizontal, so that the infrared detecting elements 43 of the infrared sensor 40 can receive infrared rays from the heating chamber 4 through the widow 34. During microwave cooking, the output shaft 51 of the motor 38 is positively/reversely rotated to move the viewing field of the infrared detecting elements 43 so that the temperature of the foods can be detected no matter where the foods are placed on the bottom face of the heating chamber 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cooking device that detects the temperature of an object to be heated by an infrared sensor.

  In a heating cooker, for example, a microwave oven, an infrared sensor that receives infrared rays emitted from food (a heated object) is provided, the temperature of the food is detected based on the detection output of the infrared sensor, and high-frequency heating is performed. To be controlled. In this case, the infrared sensor is disposed outside the upper portion of the heating chamber, and receives infrared rays emitted from the heating chamber through a window formed in the upper portion of the heating chamber.

The infrared sensor used in the microwave oven generally has a plurality of infrared detection elements, and the infrared detection elements are arranged in a line on a mounting base. The infrared sensor is reciprocally rotated by a driving device such as a stepping motor with a gear reducer, and the reciprocating rotation moves the field of view of the infrared detection element so that no matter where the food is placed on the bottom of the heating chamber, It is comprised so that the infrared rays radiated | emitted from foodstuffs can be detected (for example, patent documents 1-3).
JP 2001-165444 A JP2003-120940 JP 2004-108606 A

In order to ensure a wider detection field of view, the infrared sensor is not located directly above the center of the heating chamber, but at the upper rear of the heating chamber or at the upper side. In this case, the infrared sensor is arranged in an inclined state, whereby the field of view of the plurality of infrared detection elements arranged in a row extends from the end of the infrared sensor to the opposite end with respect to the bottom surface of the heating chamber. It is going to cross.
However, conventionally, the drive device and the temperature sensor are arranged in a straight line, that is, a plurality of infrared detection elements are arranged in a line on the extended line of the rotation center axis of the output shaft of the drive device. In particular, when the infrared sensor is rotated to detect the end of the bottom surface of the heating chamber, there is a problem that the density of the field of view of the infrared detection element on the bottom surface of the heating chamber is low and the detection accuracy is deteriorated. . In addition, since the infrared sensor and the drive device are arranged in a straight line, the length of the infrared sensor including the drive device becomes long, and there is a problem that the drive device interferes with the arrangement of other components.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide cooking that can reduce the length of the infrared sensor including the driving device while making the field of view of the infrared detecting element dense. Is to provide a vessel.

The invention of claim 1 is a heating means for heating an object to be heated contained in a heating chamber;
An infrared sensor having a plurality of infrared detection elements arranged in a row, and detecting infrared rays from the heating chamber outside the heating chamber through a window formed in an upper portion of the heating chamber;
In a heating cooker comprising an output shaft to which the infrared sensor is attached, and a drive device that rotates the infrared sensor forward and backward in order to move the detection visual field of the infrared detection element,
The drive device is disposed so that the output shaft is substantially horizontal,
The infrared sensor is provided in the heating cooker, wherein a straight line connecting the plurality of infrared detection elements is attached to the output shaft so as to be inclined with respect to a rotation center axis of the output shaft.

  According to the above means, since the infrared sensor is mounted to be inclined with respect to the substantially horizontal output shaft, the visual field density of the infrared sensor is higher than that of the configuration in which the infrared sensor and the drive device are arranged in a straight line. , Detection accuracy is improved. Further, since the length of the infrared sensor including the driving device is shortened, the degree of obstructing the arrangement of other members is reduced.

Hereinafter, an embodiment in which the present invention is applied to a microwave oven (a microwave oven combined with an oven) will be described with reference to the drawings.
As shown in FIGS. 5 to 7, the main body 1 of the microwave oven is configured by fixing a rectangular inner box (housing) 3 with the front face open in a rectangular outer box 2 with the front face open. ing. The inside of the inner box 3 is a heating chamber 4, and the front opening of the heating chamber 4 is opened and closed by a door 5 that rotates up and down.

  On the front surface of the door 5, a handle 6 is provided in the upper part, and an operation panel 9 having a plurality of operation parts 7 and a display part 8 is provided in the lower part. The operation unit 7 is for setting the cooking mode and cooking time of cooking, and the display unit 8 is for displaying the selected cooking mode and cooking time. Unlike the configuration in which the operation panel 9 is provided at the right side of the door 5 in the outer box 2 by providing the operation panel 9 in the lower part of the door 5 in this manner, the operation panel 9 is provided between the outer box 2 and the inner box 3. The lateral gap can be reduced, and the outer box 2 can be downsized in the lateral direction.

  A machine room 10 located between the outer box 2 and the inner box 3 is formed in the back part of the main body 1, and a magnetron 11, although not shown, is shown below the machine room 10 in addition to the magnetron 11. And a cooling fan device for cooling the magnetron 11 and the power supply device. The magnetron 11 generates high frequency, and the generated high frequency is supplied into the heating chamber 4 from the excitation port 13 formed at the bottom of the inner box 3 through the waveguide 12 disposed on the lower surface of the inner box 3. It has come to be.

  A step portion 14 is formed inside the bottom portion of the inner box 3, and a bottom plate 15 formed of a glass plate or a ceramic plate is placed on the step portion 14. The bottom plate 15 substantially constitutes the bottom surface of the heating chamber 4, and a rotary antenna 16 for reflecting and stirring the high frequency supplied from the excitation port 13 is disposed in a space below the bottom plate 15. ing. In addition, a lower heater 17 including a sheathed heater is disposed in a space below the bottom plate 15 so as to surround the rotating antenna 16, and an upper portion including a planar heater or the like is disposed on the upper portion of the inner box 3. A heater 18 is provided. These upper and lower heaters 17 and 18 function as oven heaters.

  On the other hand, a casing 20 of the hot air generator 19 is fixed to the back surface of the inner box 3, and a centrifugal fan 22 and a heater 23 driven by a fan motor 21 are disposed in the casing 20. Yes. The rear wall of the inner box 3, which is the rear surface of the heating chamber 4, is formed with an intake port 24 made up of a number of small holes corresponding to the center side of the fan 22, and both the upper and lower sides of the intake port 24. Exhaust ports 25 that are also located in the portion and are similarly formed of a large number of small holes are formed.

  In the hot air generator 19, when the fan 22 rotates, the air in the heating chamber 4 is sucked into the casing 20 from the intake port 24 and heated by the heater 23 to enter the heating chamber 4 from the upper and lower exhaust ports 25. Discharged. The inside of the heating chamber 4 is heated by such circulation of hot air so that oven cooking is performed. In oven cooking, oven cooking dishes (not shown) can be arranged in two stages in the heating chamber 4, but the same amount of hot air is supplied from the upper and lower vents 25 as described above. By doing so, the food on the oven-cooked dishes arranged one above the other can be cooked well together.

  The inner box 3 is made of a metal plate such as an iron plate, and includes a rectangular flange plate 26, an upper surface plate 27, a rear surface plate 28, a left side plate 29, a right side plate 30, and a bottom surface plate 31 on the front side. Among them, the upper plate 27 and the rear plate 28 are formed by bending a single plate material into an approximately L shape. These plates 26 to 31 are joined to each other by welding or the like, and the front flange plate 26 is joined to the outer box 2 by welding or the like.

  Among the ridge corners of the upper part of the inner box 3, the ridge corner on the upper rear side, in other words, the boundary between the upper plate 27 and the rear plate 28 formed from a single plate is entirely shown in FIGS. As shown also in 2, it is formed in the inclined surface 32 descend | falling toward a rear side. In addition, a substantially quadrangular frustum-shaped raised portion 33 that bulges outward is formed at the central portion of the inclined surface 32 in the lateral (left and right) direction, and the inclined upper surface (inclined surface 32) of the raised portion 33 is formed. A trapezoidal window 34 is formed open.

  Here, one plate material constituting the upper surface plate 27 and the rear surface plate 28 is hereinafter referred to as an L-shaped plate material 35. A casing mounting member 36 made of a metal plate is joined to the inclined surface 32 formed at the boundary between the upper surface plate 27 and the rear surface plate 28 of the L-shaped plate material 35 so as to cross the front of the raised portion 33 by welding or the like. Has been. In this casing attachment member 36, two sets of attachment pieces 36b, 36b and 36c, 36c are formed on the joining surface portions 36a, 36a joined to the inclined surface 36. Further, a portion positioned so as to cross the front of the raised portion 33 by connecting the left and right joint surface portions 36a, 36a is formed as a heat shield portion 36d facing the rear end portion of the upper heater 18 on the upper surface of the inner box 3. ing.

  Of the two sets of mounting pieces 36b, 36b and 36c, 36c formed on the casing mounting member 36, the mounting pieces 36b, 36b formed on the rear end edges of the joint surface portions 36a, 36a The upper end portion of the casing 20 is fixed by screwing or the like. In addition, a sensor mounting plate 37 is attached to the mounting pieces 36c and 36c formed on the inner edges of the joint surface portions 36a and 36a. As shown in FIGS. 1 and 2, a motor 38 is attached to the sensor mounting plate 37, and the motor 38 drives the infrared sensor 39 to rotate forward and backward. The configuration of the infrared sensor 39, the configuration of mounting the infrared sensor 39 to the motor 38, and the configuration of mounting the motor 38 to the sensor mounting plate 37 will be described below.

  First, the infrared sensor 39 will be described in detail. As shown in FIGS. 1 and 3, the infrared sensor 39 includes a case 40, a mounting substrate 41 accommodated in the case 40, and a lid 42 attached to the case 40. The case 40 is made of plastic, and a cylindrical protrusion 40a is formed on the bottom surface of the case 40. A plurality of ribs 40b for mounting the mounting substrate 41 on the inner bottom surface and positioning of the mounting substrate 41 are provided. A pin 40c for projecting is provided. Further, a protruding piece 40d protrudes from one side edge of the upper end of the case 40, and a plurality of engagement holes 40e are formed in the protruding piece 40d. The case 40 and the lid 42 are preferably made of conductive plastic, or in the case of non-conductive plastic, it is preferable to perform metal plating on the surface after molding.

  On the other hand, as shown in FIGS. 4A and 4B, a plurality of, for example, eight infrared detection elements 43 are mounted on the lower surface of the mounting substrate 41 at a predetermined interval so as to be positioned on a straight line. At the same time, a concave lens 45 accommodated in the metal tube 44 is mounted so as to face the eight infrared detection elements 43. Further, a connector 46 is provided on one side of the mounting substrate 41, and a shield wire 47 for connecting the detection signal of the infrared detection element 43 to the connector 46 to a control circuit (not shown) provided in the operation unit 7. Is connected. A positioning hole 41a is formed in such a mounting substrate 41. The mounting substrate 41 is housed in the case 40 so that the metal tube 44 of the concave lens 45 is fitted into the cylindrical protrusion 40a and the positioning hole 41a is fitted to the pin 41c.

  In the lid 42, a plurality of engaging protrusions 42 a protrude from one side, and a stopper piece 42 c having a through hole 42 b protrudes from the opposite side. In addition, a plurality of pins 42 d protrude from the lower surface portion of the lid 42. The lid 42 is placed on the upper surface of the case 40 so that the engaging protrusion 42a is inserted into the engaging hole 40e of the protruding piece 40d of the case 40, and is inserted into the through hole 42b of the stopper piece 42c. The tapping screw (not shown) is fixed to the case 40 by screwing into a small hole 40f formed in the case 40. In this fixed state, the lid 42 presses the mounting substrate 41 onto the rib 40b of the case 40 with pins 42d to fix the mounting substrate 41 so as not to move. Further, the tip of the concave lens 45 is located slightly recessed from the tip of the cylindrical protrusion 40a without protruding from the cylindrical protrusion 40a. When the lid 42 is fixed to the case 40, the shield wire 47 is led out from the recess 40 g formed on the side surface of the case 40.

  Here, the mounting board 41 is formed to a minimum size for mounting the infrared detection element 43 and the IC chip 48 constituting the signal processing circuit thereof, and the case 40 accommodates the mounting board 41. It is formed to the minimum size. A plurality of air holes 40h are formed on the two opposite side surfaces of the case 40, and the outside air enters and exits the case 40 through the plural pairs of air holes 40h facing each other. It is designed to be cooled. By securing the circulation of the outside air, even if the case 40 is stopped to the minimum size for housing the mounting substrate 41, no support is provided.

  Thus, the motor 38 is constituted by a stepping motor or the like incorporating a gear reduction mechanism (not shown). With respect to the motor 38, a boss portion 50 is integrally projected obliquely upward on one outer side surface of the case 40, and a fitting hole 50 a that fits the boss portion 50 into the output shaft 51 of the motor 38. Is formed. The fitting hole 50a and the output shaft 51 are formed so as to have a non-circular cross-sectional shape, for example, a substantially oval shape.

  Here, the state in which the boss part 50 is formed in relation to the infrared detection element 43 will be described. That is, when the straight line connecting the plurality of infrared detection elements 43 on the mounting substrate 41 accommodated in the case 40 is L, the boss portion 50 is viewed from below the case 40 as shown in FIG. As shown in FIG. 4A, when the center axis C1 of the fitting hole 40a coincides with the straight line L and viewed from the side of the case 40, It is formed to be inclined by a predetermined angle α.

As shown in FIG. 2, the sensor attachment member 37 to which the motor 38 is attached has attachment pieces 37a and 37a attached to the attachment pieces 36b and 36b of the casing attachment member 36 on both the left and right sides, and the motor attachment portion 37b at the center. have. A substantially L-shaped locking piece 37c is projected from the motor mounting portion 37b.
Prior to attaching the motor 38 to the sensor attachment member 37, an infrared sensor 39 is attached to the output shaft 51. The infrared sensor 39 is attached to the output shaft 51 by fitting the fitting hole 50 a of the boss portion 50 of the case 40 to the output shaft 51. The motor 38 to which the infrared sensor 39 is attached is fixed to the sensor attachment member 37 by screwing the attachment pieces 38 a and 38 a to the motor attachment portion 37 b of the sensor attachment member 37. In the fixed state of the motor 38, the rising piece 37d at the tip of the locking piece 37c of the sensor mounting member 37 is opposed to the tip of the boss 50 of the case 40 fitted to the output shaft 51 with a small gap. Inadvertent removal of the boss 50 from the shaft 51 is prevented.

  The sensor mounting member 37 to which the motor 38 is fixed is fixed to the casing mounting member 36 by screwing the mounting pieces 37a and 37a to the mounting pieces 36a and 36a of the casing mounting member 36. In this fixed state, as shown in FIG. 1, the motor 38 is in a state in which its output shaft 51 protrudes forward substantially horizontally. For this reason, the case 40 of the infrared sensor 39 is in a state of being inclined so as to be inclined upward toward the front by attaching the boss portion 50 protruding in an inclined state to the substantially horizontal output shaft 51. At the same time, the straight line L connecting the plurality of infrared detection elements 43 is inclined with respect to the rotation center axis C1 of the output shaft 51 by an angle α.

Further, when the output shaft 51 of the motor 38 extends its rotation center axis C2 (matches C1), the rotation center axis C2 passes through the window 34 of the raised portion 33 as shown in FIG. At the same time, the concave lens 45 of the infrared sensor 39 faces the inside of the heating chamber 4 through the window 34.
In the above configuration, during high frequency cooking performed by driving the magnetron 11, an object to be heated such as a food or a beverage placed in a container is placed in an arbitrary place at the bottom of the heating chamber 4. The high frequency generated by the magnetron 11 is supplied into the heating chamber 4 while being stirred by the rotating antenna 16 via the waveguide 12. As a result, the object to be heated is heated.

  During the high frequency cooking, the output shaft 51 of the motor 38 that drives the infrared sensor 39 has a rotation angle of 0 ° (the field of view S of the eight infrared detection elements 43 (see FIG. 8) is on the bottom surface of the heating chamber 4. From the state of being arranged in a line in the center in the left-right direction)), the rotation range of 35 ° clockwise and 35 ° counterclockwise is set to 70 ° in the forward and reverse directions. Thereby, the plurality of infrared detection elements 43 of the infrared sensor 39 substantially receive infrared rays from almost the entire bottom surface of the heating chamber 4. At this time, the output shaft 51 rotates intermittently by 5 °, and sends the detection signal of the infrared detecting element 43 to the control circuit every time it rotates by 5 °. And a control circuit detects the temperature of a to-be-heated object based on the detection signal output from this temperature sensor 39, and controls high frequency cooking.

  FIG. 8A shows the field of view S of each infrared detecting element 43 on the bottom surface of the heating chamber 4 every time the infrared sensor 39 rotates by 5 ° when the infrared sensor 39 rotates by 70 ° in the forward and reverse directions in this embodiment. Is. FIG. 8B shows an infrared sensor 39 similar to that of the present embodiment, in which the rotation center axis C2 of the output shaft 51 is eight infrared rays with respect to the output shaft of the motor 38, as shown in FIG. The infrared sensor 39 is configured to rotate around the straight line L connecting the eight infrared detection elements 43 so as to coincide with the straight line L connecting the detection elements 43, and the infrared sensor 39 is moved in the forward and reverse directions. The field of view S of each infrared detecting element 43 is shown on the bottom surface of the heating chamber 4 every time it is rotated by 5 ° when rotated by 70 °. Here, in FIG. 8, the angle at which the output shaft 51 rotates in the clockwise direction from 0 ° when viewed from the front is denoted by (+), and the angle at which the output shaft 51 rotates in the counterclockwise direction is denoted by (−). Indicated.

  Comparing FIGS. 8A and 8B, in the present embodiment, the field of view of the eight infrared detection elements 43 each time they are rotated by 5 ° moves substantially in parallel. The field of view of the eight infrared detection elements 43 every 5 ° rotation moves in a fan shape. In the present embodiment, the field of view of the eight infrared detection elements 43 exists on the bottom surface of the heating chamber 4 in the central portion and the central portion of the bottom surface of the heating chamber 4. In addition, at the left and right end portions of the bottom surface of the heating chamber 4, the field of view of the one infrared detection element 43 at the forefront is out of the bottom surface of the heating chamber 4. Present on the bottom.

On the other hand, in the comparative configuration, the field of view of the eight infrared detection elements 43 exists on the bottom surface of the heating chamber 4 in the central portion and the central portion of the bottom surface of the heating chamber 4. However, at the left and right end portions of the bottom surface of the heating chamber 4, the field of view of the two to five infrared detection elements 43 deviates from the bottom surface of the heating chamber 4, and only the field of view of the three to six infrared detection elements 43 is heated chamber 4. No longer exists on the bottom of the.
As described above, the number of infrared detection elements 43 whose field of view deviates from the bottom surface at the left and right end portions of the bottom surface of the heating chamber 4 is small in this embodiment, and the reason for the large number in the comparative configuration is that the rotation angle of the output shaft 51 is 0. When the infrared sensor 39 is rotated from 0 ° clockwise or counterclockwise, the infrared sensor 39 is viewed from the side. When the rotation angle is 0 degree, in this embodiment, as shown in FIG. However, as it rotates, the inclination of the infrared sensor 39 gradually decreases and approaches the horizontal.

  On the other hand, in the comparative configuration, since the rotation rotation center axis L of the output shaft 51 coincides with a straight line connecting the plurality of infrared detection elements 43, the inclination of the infrared sensor 39 is the output shaft 51 of the motor 38. Even when the rotation angle is 0 °, or when the rotation angle is 35 ° clockwise and 35 ° counterclockwise, there is no change in the tilt angle of the infrared sensor 39 as viewed from the side. For this reason, when receiving infrared rays from the left and right ends of the bottom surface of the heating chamber 4, the inclination of the optical axis P of the infrared detection element 43 with respect to the bottom surface of the heating chamber 4 is as shown in FIGS. This is considered to be due to the fact that the present embodiment is smaller than that of the comparative configuration, and the number of infrared detection elements 43 whose field of view deviates from the bottom surface of the heating chamber 4 is reduced as shown in b-3).

As described above, according to the present embodiment, the visual field density of the infrared detection element 43 that looks at the bottom surface of the heating chamber 4 is higher than that of the comparative configuration, and the detection accuracy can be further increased.
In addition, according to the present embodiment, since the entire ridge corner on the upper rear side of the heating chamber 4 is formed on the inclined surface 32, the hot air discharged from the gas outlet 25 during the oven cooking is smoothly forwarded to the front of the heating chamber 4. I can guide you.

  In addition, in this embodiment, a raised portion 33 is formed on the inclined surface 32, and the infrared detection element 43 of the infrared sensor 39 receives infrared rays from the heating chamber 4 through the window 34 of the raised portion 33. Therefore, the concave lens 45 for condensing infrared rays on the infrared detection element 43 can be brought close to the window 34. For this reason, even with the small window 34, the infrared sensor 39 can cover the entire bottom surface in the heating chamber 4, and can prevent hot air leakage during oven cooking as much as possible.

  In addition, since the extension of the rotation center axis of the output shaft 51 of the motor 38 passes through the window 34, the window 34 can be further reduced. The entire bottom surface in 4 can be covered.

Further, according to the present embodiment, the case 40 of the infrared sensor 39 is attached to the output shaft 51 of the motor 38 arranged substantially horizontally, so that the motor 38 is connected to the infrared sensor as shown in FIG. The length protruding downward from 40 is shortened. On the other hand, in the comparative configuration in which the infrared sensor 39 is linearly connected to the motor 38, the length that the motor 38 protrudes downward from the case 40 of the infrared sensor 39 is long as shown in FIG. Become. For this reason, it is necessary to partially provide a recess in the upper part of the casing 20 of the hot air generator 19 for the motor 38 to escape. If a concave portion recessed in the casing 20 is provided in the upper portion of the casing 20, the amount of hot air blown into the heating chamber 4 from the portion where the concave portion is formed during oven cooking may be reduced, resulting in uneven heating.
However, in this embodiment, since it is not necessary to form such a recess in the casing 20, there is no possibility that a portion where the hot air supply amount is insufficient during cooking in an oven will cause an uneven heating.

In addition, according to the present invention, the following effects can be obtained.
Since the infrared sensor 39 is disposed on the upper rear side of the inner box 3, even if the motor 38 protrudes from the upper surface of the inner box 3, the protruding portion becomes the machine room 10. Therefore, unlike the case where the infrared sensor 39 is disposed on the upper side of the inner box 3, it is not necessary to widen the gap between the side surface of the inner box 3 and the side surface of the outer box 2.
Since the heat-insulating part 36d located between the upper heater 18 on the upper surface of the inner box 3 and the infrared sensor 39 is formed on the casing mounting member 36, the infrared sensor 39 is released from the upper heater 28 during oven cooking. It is possible to prevent the danger of being damaged under the influence of heat.
Since the case 40 and the lid 42 are made of conductive plastic or non-conductive plastic and the surfaces thereof are metal-plated, the case 40 and the lid 42 can be protected from electromagnetic noise by electromagnetic shielding.

The casing mounting member 36 is formed with a locking piece 36c that prevents the boss 50 of the case 40 from coming out of the output shaft 51. Therefore, it is not necessary to fix the boss 50 to the output shaft 51. Screws and the like can be omitted.
Since the motor 38 can be separated from the inner box 3, the motor 38 can be made less susceptible to the heat emitted from the inner box 3 during oven cooking, and air can easily flow around the motor 38. The cooling effect of the motor 38 is increased.
In the inner box 3, since the upper surface plate 27, the rear surface plate 28, and the inclined surface 32 are formed by bending one plate, the number of parts can be reduced. Since the lid 41 can be fixed to the case 40 with one screw, the number of parts is reduced.
Since the concave lens 45 is housed in the metal tube 44, the influence of high frequency during high frequency heating can be reduced.

The present invention is not limited to the embodiments described above and shown in the drawings, and can be expanded or changed as follows.
The number of infrared detection elements 43 is not limited to eight.
The inclined surface 32 may not be formed on the entire ridge corner on the upper rear side of the inner box 3 but only on the portion to which the temperature sensor 39 is attached.
The window 34 may be formed directly on the inclined surface 32.
The part where the temperature sensor 39 is provided is not limited to the upper rear part of the inner box 3.
Detection of infrared rays by the infrared sensor 39 is not limited to high frequency cooking.

Sectional drawing of the principal part which shows one Example of this invention The exploded perspective view of the principal part which removes and shows a temperature sensor Disassembled perspective view of temperature sensor shown with motor (A) is a longitudinal side view of the temperature sensor, (b) is a bottom view. Longitudinal side view of microwave oven Front view of microwave oven with door open Front view of microwave oven with door closed The top view which shows the visual field of an infrared detection element separately in the case of a present Example, and the case of a comparison structure A surface measurement diagram showing the rotation state of the temperature sensor separately for the present embodiment and the comparative configuration. A surface measurement diagram showing the relationship between the temperature sensor and the other components in the connected state of the motor, divided into the case of this embodiment and the case of the comparative configuration.

Explanation of symbols

  In the drawings, 2 is an outer box, 3 is an inner box (frame), 4 is a heating chamber, 5 is a door, 11 is a magnetron, 17 is a lower heater, 18 is an upper heater, 19 is a hot air generator, 20 is a casing, 22 Is a fan, 23 is a heater, 24 is an air inlet, 25 is an air outlet, 32 is an inclined surface, 33 is a raised portion, 34 is a window, 36 is a casing mounting member, 37 is a sensor mounting member, and 38 is a motor (drive device). , 39 is an infrared sensor, 40 is a case, 41 is a mounting substrate, 42 is a lid, 43 is an infrared detection element, 45 is a concave lens, 50 is a boss portion, and 51 is an output shaft.

Claims (4)

Heating means for heating an object to be heated contained in a heating chamber;
An infrared sensor having a plurality of infrared detection elements arranged in a row, and detecting infrared from the heating chamber through a window formed in an upper portion of the heating chamber;
In a heating cooker comprising an output shaft to which the infrared sensor is attached, and a drive device that rotates the infrared sensor forward and backward in order to move the detection visual field of the infrared detection element,
The drive device is disposed so that the output shaft is substantially horizontal,
The heating cooker, wherein the infrared sensor is attached to the output shaft so that a straight line connecting the plurality of infrared detection elements is inclined with respect to a rotation center axis of the output shaft.   The said heating chamber is comprised from the rectangular-shaped housing | casing, At least one part of the upper ridge corner part of this housing | casing is formed in an inclined surface, The said window is formed in this inclined surface. Cooking cooker.   The cooking device according to claim 2, wherein the window is formed in a raised portion formed on the inclined surface so as to bulge outward from the heating chamber. The said window is inclined and the said drive device is arrange | positioned in the position where the extension line of the rotation center axis line of the said output shaft passes the inside of the said window. Cooking cooker.

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