JP7223417B2 - heating cooker - Google Patents

Description

The present invention relates to a heat cooker.

Conventionally, a plurality of optical sensors that can detect the entry of foreign matter are provided on the front side of the lower surface of the glass top plate, and if any of the plurality of optical sensors detects the entry of foreign matter, the heating power of the stove burner can be reduced. There is known a stove that can be used (see, for example, Patent Document 1). Also known is a stove provided with a capacitive touch switch for instructing the operation of the heating means on the glass top plate covering the upper surface of the stove main body (see, for example, Patent Document 2). The touch switch is composed of a switch mark printed on the surface of the glass top plate, and an operation circuit board provided close to the portion facing the switch mark on the lower surface of the glass top plate.

In the stoves described in Patent Documents 1 and 2, in order to maintain stable operation of the optical sensors and touch switches, it is common to cool the optical sensors and the operation circuit board with air supplied from a cooling fan. . Therefore, when providing both of these functions in one stove, for example, the optical sensor and the operation circuit board are arranged in a case arranged on the lower surface of the top plate, and the cooling air from the cooling fan is supplied into the case. It is conceivable to cool the However, when optical sensors and touch switches are arranged widely in the left and right direction on the front side of the top plate, it is difficult to sufficiently cool with one cooling fan. is provided to cool the case by supplying cooling air from both the left and right sides. In this case, a cooling path for accommodating and cooling the plurality of optical sensors and a cooling path for accommodating and cooling the operating circuit board are provided in the case, and cooling air is supplied to each of these cooling paths. Distributed feeding is preferred.

JP 2018-128161 A JP 2005-308341 A

In the case of the above configuration, a plurality of cooling paths are provided in the case, but operation cannot be guaranteed if a problem occurs in each cooling fan. Therefore, in order to detect the temperature of each cooling path, a large number of thermistors are required, so there is a problem that it takes time to assemble the thermistors and the cost is high.

SUMMARY OF THE INVENTION An object of the present invention is to provide a heating cooker capable of supplying cooling air to a plurality of paths in which a plurality of electrical components are arranged with two cooling fans and capable of detecting malfunction of each cooling fan with a small number of thermistors. is.

The heating cooker according to claim 1 comprises a housing with an upper opening, a grill chamber provided in the center of the housing, and a top plate provided in the upper part of the housing so as to block the opening. In the heating cooker equipped with the electrical component, the electrical component is provided on the lower surface of the top plate so as to straddle the upper part of the grill chamber in the left-right direction, and supports the first electrical component and the second electrical component on the lower surface of the top plate. a first cooling fan that supplies cooling air to a first intake port provided at one end in the left-right direction of the electrical component support portion; and a second fan provided at the other end of the electrical component support portion. a second cooling fan for supplying the cooling air to the inlet, wherein the electrical component support portion extends in the left-right direction and includes a first cooling path in which the first electrical component is arranged; and the left-right direction. a second cooling path extending in the direction of the first cooling path and provided side by side on the front side or the rear side of the first cooling path, in which the second electrical component is arranged; A first discharge section that discharges the cooling air that has flowed through the cooling path to the outside, and a second discharge section that is provided on the center side in the left-right direction and discharges the cooling air that has flowed through the second cooling path to the outside. wherein the first cooling path has a first path portion on the side of the first intake and a second path portion on the side of the second intake, and the second cooling path includes the first It has a third passage portion on the intake side and a fourth passage portion on the second intake side, and the cooling air flows from the first intake port to the first passage portion and the third passage portion. The cooling air is distributed and supplied and flows toward the first discharge portion and the second discharge portion, and the cooling air is distributed and supplied from the second intake port to the second path portion and the fourth path portion, One of the first path part and the second path part, which flows toward the first discharge part and the second discharge part, detects the temperature of the cooling air flowing through the one path part. One thermistor is provided, and of the third path portion and the fourth path portion, in the path portion on the left and right opposite side of the one path portion side where the first thermistor is provided in the first cooling path, A second thermistor is provided to detect the temperature of the cooling air flowing through the passage portion on the left and right opposite sides.

The one path portion of the heating cooker according to claim 2 is the first path portion, the opposite path portion is the fourth path portion, and the first thermistor is the first It is preferable that the passage portion is provided in a region where the first discharge portion is arranged, and the second thermistor is provided in a region where the second discharge portion is arranged in the fourth passage portion.

The first electrical component of the heating cooker according to claim 3 is plural, and the first path portion is formed longer in the left-right direction than the second path portion, and the plurality of first electrical components Among them, a larger number of the first electrical components are arranged in the first path portion than the first electrical components arranged in the second path portion, and the first thermistor is arranged in the first path portion in the It may be provided in a region farthest from the first inlet and where the first discharge section is arranged.

According to the heating cooker of claim 1, the first thermistor is provided in one of the first cooling path and the second cooling path, and the third cooling path and the second cooling path are provided. A second thermistor is provided in one of the four path portions, which is on the opposite side of the first cooling path to the first thermistor. As a result, when an abnormality occurs in the first cooling fan, it can be detected based on the temperature detected by the first thermistor, and when an abnormality occurs in the second cooling fan, it can be detected based on the temperature detected by the second thermistor. detectable. Therefore, since the two thermistors can detect malfunctions of the first cooling fan and the second cooling fan, the manufacturing cost of the heating cooker can be suppressed.

According to the heating cooker of claim 2, in the first path portion, the region where the first discharge portion is arranged is the downstream side in the direction in which the cooling air flows, and the cooling after cooling the first electrical component This is the area where the temperature of the cooling air is the highest, as the air flows through it. Since the first thermistor is provided in such a region, when an abnormality occurs in the first cooling fan, the malfunction can be accurately detected based on the detected temperature of the first thermistor. On the other hand, similarly in the fourth path portion, the region where the second discharge portion is arranged is downstream in the direction in which the cooling air flows, and the cooling air after cooling the second electrical component flows. This is the area where the air temperature is the highest. Since the second thermistor is provided in such a region, when an abnormality occurs in the second cooling fan, the malfunction can be accurately detected based on the detected temperature of the second thermistor.

According to the heating cooker of claim 3, in the first cooling path, the first path section is longer in the left-right direction than the second path section, and a large number of first electrical components are arranged. In the first path portion, the region farthest from the first intake port and where the first discharge portion is arranged corresponds to the downstream end portion in the direction in which the cooling air flows. The temperature of the cooling air in the region of the downstream end of the first path portion is higher than that of the region of the downstream end of the second path portion. Since the first thermistor is provided in such a region of the first path portion, it is possible to accurately detect the failure of the first cooling fan.

1 is a perspective view of a stove 1; FIG. 2 is a plan view of the stove 1; FIG. FIG. 3 is a cross-sectional view taken along line II shown in FIG. 2; 1 is a perspective view of a grill warehouse 10; FIG. 3 is a perspective view showing a state in which a left front panel 80 and a right front panel 90 are connected via a left duct portion 71 and a right duct portion 72 to a sensor case 40 fixed to the lower surface of the top plate 3. FIG. FIG. 6 is a perspective view seen from an angle different from that of FIG. 5; 4 is a perspective view of the upper surface side of the sensor case 40. FIG. 4 is a perspective view of the lower surface side of the sensor case 40. FIG. FIG. 6 is a partially enlarged view within the W region shown in FIG. 5; FIG. 10 is a diagram showing a state in which the operating portion 9 is rotated forward within the W region; 4 is an exploded perspective view of the sensor case 40, the right duct portion 72, and the right front panel 90. FIG.

Embodiments of the present invention will be described below. Unless there is a specific description, the structure of the apparatus described below is merely an example of explanation and not intended to be limiting. The drawings are used to explain technical features that can be employed by the present invention.

The structure of the stove 1 will be described with reference to FIGS. 1 to 6. FIG. The stove 1 shown in FIG. 1 is a built-in stove. A stove 1 includes a housing 2 and a top plate 3. The top plate 3 is made of glass. A left burner 4 is provided on the left side of the upper surface of the top plate 3, a right burner 5 is provided on the right side of the upper surface, and a grill exhaust port 7 is provided on the rear side of the upper surface. The lower surface of the top plate 3 is printed with non-transmissive printing that is partially transmissive. A grill door 8 is provided at the center of the front surface of the housing 2 so as to be able to be pulled out toward the front side. The grill door 8 opens and closes a grill opening (not shown) on the front side of a grill chamber 10 (see FIGS. 3 and 4) provided inside the housing 2 . A handle 8A is provided on the upper part of the front surface of the grill door 8 so as to protrude forward. On the front surface of the housing 2, decorative plates 6A and 6B are attached to the upper and lower left sides of the grill door 8, and decorative plates 6C and 6D are attached to the upper and lower right sides.

When the right decorative panels 6C and 6D are removed from the front surface of the housing 2, the front surface of the right front panel 90 is exposed as shown in FIG. A power switch 19 is provided on the front upper portion of the right front panel 90 . An opening 66 is provided in the upper front portion of the decorative plate 6C, and the power switch 19 protrudes forward from the opening 66 (see FIG. 1). A tubular intake passage portion 95 and an operation portion 9 are provided at the lower front portion of the right front panel 90 . The intake passage portion 95 extends rearward and has an air inlet 951 at its front end. The air inlet 951 opens downward near the front side of the bottom surface of the housing 2 . The operation unit 9 is for operating the grille, and is rotatably supported on the front lower portion of the right front panel 90 . The intake passage portion 95 takes in outside air through an air inlet 951 .

When the left decorative panels 6A and 6B are removed from the front surface of the housing 2, the front surface of the left front panel 80 is exposed as shown in FIG. A battery case 83 is provided in a substantially central portion of the front surface of the left front panel 80 so as to be able to be pulled out toward the front side. An intake passage portion 85 is provided in the lower front portion of the left front panel 80 . The intake passage portion 85 extends rearward and has an air inlet 851 at its front end. The air inlet 851 opens downward near the front side of the bottom surface of the housing 2 . The intake passage portion 85 takes in outside air through an air inlet 851 .

As shown in FIG. 2 , on the front side of the upper surface of the top plate 3 , a left operating section 11 for operating the left burner 4 is provided in front of the left burner 4 , and a right operating section 11 is provided in front of the right burner 5 . A right operating section 12 for operating the burner 5 is provided. The left operation unit 11 includes a plurality of reception units for receiving operations such as ignition, extinguishment, and increase/decrease of thermal power of the left burner 4 by the touch of a finger, a display unit for displaying the timer time, etc. A light-emitting display section or the like that lights up or blinks is provided. Similarly to the left operation unit 11, the right operation unit 12 is also provided with a plurality of reception units, a display unit, a light emitting display unit, and the like corresponding to the operation of the right burner 5. FIG. On the front side of the central portion sandwiched between the left burner 4 and the right burner 5, there is provided a light-emitting display portion 13 for the grill that lights up when the grill is in use. In the left operation unit 11 and the right operation unit 12 , the reception unit, the light-emitting display unit, and the light-emitting display unit 13 for the grill are translucent buttons, marks, symbols, or the like printed on the top plate 3 . The display portion is a non-printing area of the top plate 3 and is a transparent window portion.

A single electrical board 100 (see FIG. 7) is provided on the front side portion of the bottom surface of the top plate 3 so as to correspond to the left operation portion 11, the right operation portion 12, and the grill light-emitting display portion 13 provided on the top surface. It is attached with an adhesive, double-sided tape, or the like. A sensor case 40 is fixed via a fixing plate 3A (see FIG. 6) so as to cover the electrical board 100 from below. The fixed plate 3A is fixed to the lower surface of the top plate 3. As shown in FIG. The sensor case 40 accommodates the electrical board 100 inside and supports the electrical board 100 attached to the lower surface of the top plate 3 from below.

On the upper surface of the electrical board 100, a capacitive sensing unit that senses fingertip touch is provided at a position corresponding to the reception unit, and a 7-segment display is provided at a position corresponding to the display unit. A light-emitting portion such as an LED is provided at a position corresponding to the light-emitting display portion and the grill light-emitting display portion 13 . As a result, in the left operation unit 11 and the right operation unit 12, the touch of the fingertip on each reception unit is sensed by each sensing unit of the electrical board 100, and the display by the 7-segment display and the light emission by the light-emitting unit are performed by the display unit. , the light-emitting display section, and the light-emitting display section 13 for the grill are recognized by the user. A specific structure of the sensor case 40 will be described later.

As shown in FIG. 2, on the rear side of the left operating section 11, there is provided a sensor window section 15 having a substantially arc shape in plan view. A window portion 16 is provided, and a sensor window portion 17 having a substantially rectangular shape in a plan view is provided on the rear side of the grill light-emitting display portion 13 . The sensor windows 15 to 17 are non-printing regions having transparency, and transmit below the top plate 3 when viewed from above. Below the sensor window 15, four sensors 31 to 34 are arranged from left to right. Below the sensor window 16, four sensors 35 to 38 are arranged from left to right. One sensor 39 is arranged below the sensor window 17 . These nine sensors 31 to 39 (hereinafter collectively referred to as "sensors 30") are general distance measuring sensors capable of measuring the distance to a foreign object positioned above, for example, infrared sensors. These nine sensors 31 to 39 are accommodated in a sensor case 40 fixed to the lower surface of the top plate 3 and supported on the lower surface side of the top plate 3 .

The structure and function of sensor 30 will now be described. The sensor 30 includes a light emitting portion 47 and a light receiving portion 48 (see FIG. 7). In addition, in the sensor case 40 shown in FIG. 7, the surface on the front side of the paper surface is defined as the upper surface. The light emitting unit 47 emits infrared light upward. The light receiving section 48 receives the reflected light of the infrared light emitted by the light emitting section 47 reflected by the foreign matter. Based on the intensity of the reflected light received by the light receiving section 48, the sensor 30 measures the distance to the foreign object by applying the triangulation method. When a foreign object (for example, a part of the user's body) enters above the corresponding sensor windows 15 to 17, the sensor 30 detects the light reflected by the foreign object through the sensor windows 15 to 17. The light is received by the light receiving unit 48 via the sensor, and the distance to the foreign object is measured. The sensor 30 outputs the measured distance to the foreign object to the controller (not shown) of the stove 1 as a distance signal. Based on the received distance signal, the control unit judges that the detected foreign matter is within a predetermined height range from the top plate 3, determines that there is a foreign matter, and controls the stove burners (left burner 4, right Control is performed to rapidly reduce the thermal power of the burner 5).

As shown in FIGS. 5 and 6, between the left end portion of the sensor case 40 and the rear end opening (not shown) of the intake passage portion 85 of the left front panel 80, there is a vertically extending substantially cylindrical body. A left duct portion 71 is connected. A cooling fan (not shown) is attached inside the left duct portion 71 . The left duct portion 71 supplies the cooling air taken into the intake passage portion 85 to the sensor case 40 . A substantially cylindrical right duct portion 72 extending vertically is connected between the right end portion of the sensor case 40 and the rear end opening portion 952 (see FIG. 11) of the intake passage portion 95 of the right front panel 90 . . A right cooling fan 75 is attached inside the right duct portion 72 . The right duct portion 72 supplies the cooling air taken into the intake passage portion 95 to the sensor case 40 . The specific structures of the left duct portion 71 and the right duct portion 72 will be described later.

The structure of the grill chamber 10 will be described with reference to FIG. The grill chamber 10 is formed in a substantially rectangular parallelepiped shape with an open front surface. The grill chamber 10 is equipped with a top fire burner 25 and a bottom fire burner 26. - 特許庁The top fire burner 25 and the bottom fire burner 26 are grill burners. The top flame burner 25 is a flat burner and is provided substantially at the center of the lower surface of the upper wall 101 of the grill chamber 10 . The bottom burner 26 is formed in a substantially U-shape (horse-shoe shape) that opens forward in a plan view, and includes a left flame hole portion 261 and a right flame hole portion (not shown). The left flame hole 261 extends in the front-rear direction at substantially the center in the height direction of the inner surface of the left side wall 102 . The right flame hole extends in the front-rear direction at substantially the center in the height direction of the inner surface of the right side wall 103 . In each of the left side wall 102 and the right side wall 103, a plurality of slit-shaped inlets 105 are arranged in the front-rear direction at positions substantially at the same height as the left flame hole portion 261 and the right flame hole portion. The intake 105 takes combustion air into the grill chamber 10 from the outside.

A heat shield plate 27 is attached to the upper portion of the upper wall 101 from above. The heat shield plate 27 has a substantially rectangular shape in plan view, and is formed in a substantially U shape opening downward in front view. Between the heat shield plate 27 and the upper wall 101, a gap extending in the front-rear direction is provided. The heat shield plate 27 suppresses the temperature rise of the top plate 3 when the grill chamber 10 is used. A through hole 271 penetrating in the vertical direction is provided on the front side of the heat shield plate 27 and substantially in the center in the left-right direction. The through-hole 271 is formed in a substantially rectangular shape in plan view. A connection tube 68 (see FIG. 6) of the sensor case 40, which will be described later, is fitted and connected to the through hole 271 from above (see FIG. 3).

A tubular duct portion 28 is provided at the rear portion of the grill chamber 10 . The duct portion 28 communicates with the inside of the grill chamber 10 and the gap between the upper wall 101 and the heat shield plate 27, respectively. The duct portion 28 extends obliquely upward from the rear portion of the grill chamber 10 toward the rear, and a grill exhaust port 281 is provided at the upper end portion thereof. The grill exhaust port 281 is arranged directly below the exhaust port 7 of the top plate 3 (see FIG. 3). As a result, combustion exhaust in the grill chamber 10 flows through the duct portion 28 and is discharged to the outside through the grill exhaust port 281 and the exhaust port 7 .

The structure of the sensor case 40 will be described with reference to FIGS. 7 and 8. FIG. In addition, in the sensor case 40 shown in FIG. 8, the surface on the front side of the paper surface is the bottom surface. The sensor case 40 is a resin structure extending in the left-right direction. The sensor case 40 has a body portion 41 . The main body portion 41 is a case body extending in the horizontal direction in a plan view, and includes a front side portion 44 and a rear side portion 45 .

The structure of the front side portion 44 will be described. As shown in FIG. 7, the front side portion 44 is the front side portion of the main body portion 41 and is formed in a substantially rectangular shape elongated in the horizontal direction in a plan view. The upper surface of the front side portion 44 is a surface facing the lower surface of the top plate 3 . A substrate accommodating portion 50 is provided on the upper surface of the front side portion 44 . The substrate housing portion 50 is formed in a box shape that opens upward. With the sensor case 40 fixed to the lower surface of the top plate 3 , the electrical substrate 100 attached to the lower surface of the top plate 3 is accommodated inside the substrate accommodating portion 50 . A left tubular portion 42 is provided at the left end portion of the lower surface of the front side portion 44 so as to protrude downward, and a right tubular portion 43 is provided at the right end portion of the lower surface so as to protrude downward.

Five projections 51A to 51E are protruded from the bottom surface of the substrate housing portion 50. As shown in FIG. Projection 51A is approximately the center of the bottom surface in the left-right direction, projection 51B is the front left corner of the bottom surface, projection 51C is the front right corner of the bottom surface, projection 51D is located between projections 51A and 51B and on the rear side, The convex portion 51E is provided between the convex portions 51A and 51C and at a position on the rear side. The convex portion 51B is formed in a belt shape extending in the front-rear direction in a plan view, and divides the inside of the board accommodating portion 50 into left and right. An elastic body (not shown) is attached to the upper surface of each of the projections 51A to 51E. The upper surface of each of the projections 51A to 51E is in close contact with the lower surface of the electrical substrate 100 attached to the lower surface of the top plate 3 via an elastic body. As a result, the electrical board 100 is stably supported from below inside the board accommodating portion 50 while floating from the bottom surface.

A left inlet 52 is provided at the left end of the bottom surface of the substrate accommodating portion 50 behind the protrusion 51B, and a right inlet 53 is provided at the right end behind the protrusion 51C. The left inlet 52 communicates with the inside of the left tubular portion 42 , and the right inlet 53 communicates with the inside of the right tubular portion 43 . Front discharge ports 54A and 54B (see FIG. 8) aligned in the left-right direction are provided in the front portion of the bottom surface of the substrate accommodating portion 50, which is generally central in the left-right direction. In the central portion of the board accommodating portion 50, the left front outlet 54A is provided to the left of the convex portion 51A. The right front outlet 54B is provided on the right side of the projection 51A. The front side discharge ports 54A and 54B open downward. An opening 55 is provided behind the front discharge port 54A. Inside the opening 55, the connector section 100A (see FIG. 8) of the electrical board 100 is arranged. A left board path 50</b>A and a right board path 50</b>B are formed inside the board accommodating portion 50 . The left board path 50A is formed to the left of the protrusion 51A, and the right board path 50B is formed to the right of the protrusion 51A of the board accommodating section 50. As shown in FIG. Cooling air that has flowed into the left board path 50A from the left inlet 52 flows and is discharged from the front outlet 54A. The cooling air that has flowed into the right board path 50B from the right inlet 53 flows and is discharged from the front outlet 54B. A thermistor 301 is provided in the vicinity of the rear side of the opening 55 in the left substrate path 50A. The thermistor 301 detects the temperature of the cooling air flowing through the downstream end of the left substrate path 50A.

The structure of the rear side portion 45 will be described. As shown in FIG. 8, the rear portion 45 is the rear portion of the main body portion 41 and extends in the horizontal direction in a plan view. The upper surface of the rear side portion 45 is a surface facing the lower surface of the top plate 3 . A sensor housing portion 60 is provided on the lower surface of the rear side portion 45 . The sensor housing portion 60 has a long, wavy shape in which two circular arcs are arranged in the left-right direction in a bottom view, and is formed in a box shape that opens downward. The sensor housing portion 60 includes a left sensor housing portion 61 , a right sensor housing portion 62 and a central sensor housing portion 63 . The left sensor housing portion 61 is provided on the left side of the sensor housing portion 60 , the right sensor housing portion 62 is provided on the right side of the sensor housing portion 60 , and the center sensor housing portion 63 is provided on the center side of the sensor housing portion 60 . The left sensor housing portion 61 and the right sensor housing portion 62 are curved in a substantially arc shape so as to be concave rearward in bottom view. The central sensor housing portion 63 is formed in a substantially rectangular shape when viewed from the bottom.

Four sensors 31 to 34 are fixed in order from the left side to the right side inside the left sensor housing portion 61 . The light-emitting portion 47 and the light-receiving portion 48 of each of the sensors 31 to 34 are exposed in a tubular concave portion 451 formed on the upper surface side of the rear side portion 45 (see FIG. 7). With the sensor case 40 fixed to the lower surface of the top plate 3 , the sensors 31 to 34 are supported directly below the sensor window 15 of the top plate 3 . A left sensor path 60A is formed inside the left sensor housing portion 61 . Cooling air flows through the left sensor path 60A from the left end toward the center. A forward projecting portion 611 extending toward the front side portion 44 is provided at the left end portion of the left sensor housing portion 61 . The left inlet 52 is provided on the bottom surface of the forward projecting portion 611 . The left inflow port 52 is arranged above the left cylindrical portion 42 and communicates the board accommodating portion 50 and the left sensor accommodating portion 61 with each other.

Four sensors 35 to 38 are fixed inside the right sensor housing portion 62 in order from the left side to the right side. The light-emitting portion 47 and light-receiving portion 48 of each of the sensors 35 to 38 are also exposed in a tubular concave portion 451 formed on the upper surface side of the rear side portion 45 (see FIG. 7). With the sensor case 40 fixed to the lower surface of the top plate 3 , the sensors 35 to 38 are supported directly below the sensor window 16 of the top plate 3 . A right sensor path 60B is formed inside the right sensor housing portion 62 . Cooling air flows through the right sensor path 60B from the right end toward the center. A forward projecting portion 621 extending toward the front side portion 44 is provided at the right end portion of the right sensor housing portion 62 . The right inlet 53 is provided on the bottom surface of the forward projecting portion 621 . The right inlet 53 is arranged above the right tubular portion 43 and communicates the substrate housing portion 50 and the right sensor housing portion 62 with each other.

A sensor 39 is fixed to the inner central portion of the central sensor accommodating portion 63 . A light-emitting portion 47 and a light-receiving portion 48 of the sensor 39 are also exposed on the upper surface side of the rear side portion 45 (see FIG. 7). With the sensor case 40 fixed to the lower surface of the top plate 3 , the sensor 39 is supported directly below the sensor window 17 of the top plate 3 . A partition wall 631 is erected at a position adjacent to the left side of the sensor 39 inside the central sensor housing portion 63 .

The partition wall 631 extends in the front-rear direction and partitions the inside of the central sensor housing portion 63 into a left sensor path 60A on the left sensor housing portion 61 side and a right sensor path 60B on the right sensor housing portion 62 side. The length of the right sensor path 60B in the left-right direction is longer than the length of the left sensor path 60A in the left-right direction. Thus, four sensors 31-34 are arranged in the left sensor path 60A, while five sensors 35-39 are arranged in the right sensor path 60B. A thermistor 302 is provided on the right side of the partition wall 631 and at a position close to the rear side of the sensor 39 . Thermistor 302 detects the temperature of the cooling air flowing through the downstream end of right sensor path 60B. The thermistors 301 and 302 are electrically connected to the control section of the stove 1 via wiring (not shown). The controller can control the operation of the stove 1 based on the temperatures detected by the thermistors 301 and 302 .

A lid portion 65 is fixed with a plurality of screws to the lower surface side of the rear side portion 45 having the above structure so as to close the inside of the sensor housing portion 60 . The lid portion 65 includes a left lid portion 651 , a right lid portion 652 , and a central lid portion 653 so as to correspond to the shape of the sensor housing portion 60 . The shapes of the left lid portion 651, the right lid portion 652, and the center lid portion 653 correspond to the shapes of the left sensor housing portion 61, the right sensor housing portion 62, and the center sensor housing portion 63, respectively. A left tubular portion 42 extending in the vertical direction is provided at the left end portion of the left lid portion 651 . The upper end opening of the left tubular portion 42 is arranged on the forward projecting portion 611 of the left sensor housing portion 61 . An air intake port 421 , which is a lower end opening of the left cylindrical portion 42 , protrudes downward from the forward protruding portion 611 . A rectangular frame-shaped elastic body 422 is fixed to the inlet 421 . A right tubular portion 43 extending in the vertical direction is also provided at the right end portion of the right lid portion 652 . The upper end opening of the right cylindrical portion 43 is arranged in the forward projecting portion 621 of the right sensor housing portion 62 . An air intake port 431 , which is a lower end opening of the right cylindrical portion 43 , protrudes downward from the forward projecting portion 621 . A rectangular frame-shaped elastic body 432 is fixed to the inlet 431 .

The lower surface of the central lid portion 653 is provided with a substantially square tube-shaped connection tube 68 protruding downward. The connection tube 68 communicates with the inside of the central sensor housing portion 63 . An elastic body 69 having a substantially rectangular frame shape when viewed from the bottom is attached to the lower end portion of the connecting tube 68 protruding downward. A partition wall 681 is provided inside the connection tube 68 . The partition wall 681 partitions the inside of the connection tube 68 into left and right. When the lid portion 65 is fixed to the lower surface side of the rear side portion 45 , the lower end portion of the partition wall 681 contacts the upper end portion of the partition wall 631 of the central sensor housing portion 63 . The connection cylinder 68 can be attached from above to the through hole 271 of the heat shield plate 27 of the grill chamber 10 via the elastic body 69 . The connection tube 68 communicates with the lower gap of the heat shield plate 27 when attached to the through hole 271 .

The structure of the right front panel 90 will be described with reference to FIGS. 9-11. As shown in FIG. 9 , the right front panel 90 is formed in a substantially vertically long rectangular shape when viewed from the front, and includes a front wall portion 91 and a rear cylindrical portion 92 . The front wall portion 91 is formed in a substantially rectangular shape elongated in the vertical direction when viewed from the front, and includes a main body portion 91A and a frame portion 91B. The body portion 91A is provided on the upper side of the front wall portion 91 and has a substantially rectangular shape when viewed from the front. The body portion 91A has a power switch 19 on the upper right portion of the front surface. A decorative plate 6C (see FIG. 1) is attached to the front surface of the body portion 91A. A substantially cylindrical support column 94 protruding rearward is provided on the back side of the body portion 91A (see FIG. 11). A fixing hole 941 that opens rearward is provided at the rear end of the support column 94 . An auxiliary rib 942 having a substantially triangular shape in plan view is provided between the side surface of the support column 94 and the rear surface of the main body portion 91A. Auxiliary ribs 942 reinforce the support posts 94 .

The frame portion 91B is provided on the lower side of the front wall portion 91 and has a substantially rectangular frame shape when viewed from the front. A pair of shaft support portions 911 and 912 are provided on both left and right sides of the lower portion of the frame portion 91B. The lower portion of the substantially triangular prism-shaped operating portion 9 is rotatably supported by the pair of shaft support portions 911 and 912 . A rectangular opening 9B is provided in the front surface of the operating portion 9, and an intake passage portion 95 is arranged inside the opening 9B. A decorative panel 6</b>D (see FIG. 1 ) is fixed to the front surface of the operating section 9 . When the upper portion of the decorative plate 6D is pushed backward with a finger, the operation portion 9 is unlocked by the lock mechanism 98 provided on the front surface of the right front panel 90, and rotates forward with the lower portion as a base point. As a result, as shown in FIG. 10, the grill operation panel 9A provided on the rear side of the operation unit 9 is pulled forward.

The rear tubular portion 92 is provided so as to protrude rearward from the rear portion of the frame portion 91B. The rear tubular portion 92 is formed in a substantially square tubular shape. A fixing plate 93 is provided above the opening on the rear end side of the rear tubular portion 92 . The fixing plate 93 is provided with two fixing holes 931 for fixing to the front surface of the body portion 731 . An intake passage portion 95 is provided on the bottom surface of the rear tubular portion 92 . The intake passage portion 95 is formed in a substantially square tubular shape extending in the front-rear direction. A plate-like closing portion 955 is provided at the front end portion of the intake passage portion 95 so as to close the opening thereof, and an air inlet 951 is provided below it. A lower end portion of the blocking portion 955 is positioned forward of a front end portion of the bottom surface of the intake passage portion 95 . Therefore, the air inlet 951 opens downward and is formed in a slit shape elongated in the left-right direction when viewed from the bottom. Furthermore, the position of the lower end of the closing portion 955 is higher than the bottom surface of the rear tubular portion 92 . Therefore, the air inlet 951 also opens forward and is formed in a slit shape elongated in the left-right direction when viewed from the front.

A pair of inclined portions 96 are arranged on both left and right sides of the air inlet 951 . The pair of inclined portions 96 are provided at the lower corners of the front ends of the pair of left and right side walls 956 of the intake passage portion 95, and are inclined upward from the rear to the front. As shown in FIG. 11 , a rear end opening 952 is provided at the rear end of the intake passage portion 95 . The rear end opening 952 opens toward the rear and is formed in a generally rectangular shape when viewed from the rear. A protrusion 953 that protrudes upward in a rib shape is provided at the upper end of the rear end opening 952 .

Although not described in detail, the left front panel 80 also includes a front wall portion 81 and a rear tubular portion 82, similarly to the right front panel 90 (see FIG. 6). An intake passage portion 85 is provided on the bottom surface of the rear cylindrical portion 82 (see FIG. 5). A plate-shaped closing portion 855 is provided at the front end of the intake passage portion 85 so as to close the opening thereof, and an air inlet 851 is provided below it.

The structure of the right duct portion 72 will be described with reference to FIG. The right duct portion 72 includes a front case portion 73 , a rear case portion 74 and a right cooling fan 75 . The front case portion 73 includes a main body portion 731 and a front flow path forming portion 732 . The main body portion 731 is formed in a substantially rectangular shape when viewed from the rear, and has substantially the same shape as the opening on the rear end side of the rear cylindrical portion 92 of the right front panel 90 . An insertion tube portion 735 projecting forward is provided on the lower side of the front surface of the main body portion 731 . The insertion tube portion 735 is formed in a substantially square tube shape.

The front flow path forming portion 732 extends upward from the lower back surface of the main body portion 731 while being inclined slightly to the right, and protrudes further upward from the upper end portion of the main body portion 731 . A cross section perpendicular to the length direction of the front flow path forming portion 732 is substantially U-shaped opening toward the rear. A fixing piece 737 that protrudes leftward is provided on the left side surface of the upwardly protruding portion of the front flow path forming portion 732 . The fixing piece 737 is provided with a fixing hole (not shown) penetrating in the front-rear direction. A fan mounting portion 734 is provided at the lower end portion of the front flow path forming portion 732 . The fan mounting portion 734 has a substantially rectangular shape when viewed from the rear and is formed in a substantially box shape that opens toward the rear. An insertion hole 733 that is inserted in the front-rear direction is provided on the inner surface of the main body portion 731 and inside the fan mounting portion 734 . The insertion hole 733 is formed in a generally circular shape when viewed from the rear. The insertion hole 733 communicates with the inside of the insertion tube portion 735 .

The rear case portion 74 includes a lid-shaped portion 741 and a rear flow path forming portion 742 . The lid-shaped portion 741 is provided below the rear case portion 74 . The lid-shaped portion 741 has substantially the same shape as the fan mounting portion 734 of the front case portion 73, and is formed in a substantially box-like shape that opens forward. A notch portion 743 formed in a substantially rectangular shape is provided in the lower left portion of the lid-like portion 741 . The rear flow passage forming portion 742 has a shape corresponding to that of the front flow passage forming portion 732 of the front case portion 73 and extends upward from the upper portion of the lid-shaped portion 741 while being slightly rightwardly inclined. A cross section perpendicular to the length direction of the rear flow path forming portion 742 is substantially U-shaped opening forward.

The right cooling fan 75 is attached inside the fan attachment portion 734 of the front case portion 73 from behind. An air suction port (not shown) of the right cooling fan 75 is arranged on the insertion hole 733 side. An air blowing port (not shown) of the right cooling fan 75 is arranged upward toward the front flow passage forming portion 732 . The rear case portion 74 is attached from the rear to the front case portion 73 having the right cooling fan 75 attached to the fan attachment portion 734, and is fixed with a plurality of screws. The right duct portion 72 is thus configured. Inside the front side flow path forming portion 732 and the rear side flow path forming portion 742, an air flow path is formed through which the air sucked by the right cooling fan 75 flows upward. An outflow port 721 is provided at the upper end portion of the right duct portion 72 . The outflow port 721 opens upward and serves as the outlet of the air flow path of the right duct portion 72 .

In the right duct portion 72 , a harness (not shown) of the right cooling fan 75 attached to the fan mounting portion 734 is pulled out from a rectangular opening (not shown) formed by the notch portion 743 . This opening is closed by the outer surface of the casing of the right cooling fan 75 . The periphery of the opening and the outer surface of the casing are in close contact. As a result, the stove 1 can prevent high-temperature air from entering the air flow path inside the right duct portion 72 while maintaining the electrical connection of the right cooling fan 75 .

Although not described in detail, the structure of the left duct portion 71 is also the same as the structure of the right duct portion 72 . A left cooling fan (not shown) is mounted inside the left duct portion 71, and an air flow path is formed through which air sucked by the left cooling fan flows upward from below. An outlet 711 (see FIG. 6) is provided at the upper end of the left duct portion 71 . The outflow port 711 opens upward and serves as the outlet of the air flow path of the left duct portion 71 .

An example of a method of fixing the right duct portion 72 to the right front panel 90 will be described with reference to FIG. 11 . The body portion 731 of the front case portion 73 of the right duct portion 72 is positioned with respect to the rear end side opening of the rear cylindrical portion 92 of the right front panel 90 so as to close the opening from behind. The open end on the rear end side of the rear tubular portion 92 and the fixing plate 93 are in close contact with the front surface of the main body portion 731 . As a result, the opening on the rear end side of the rear tubular portion 92 is closed by the main body portion 731 .

Further, the insertion tube portion 735 of the right duct portion 72 is fitted inside the rear end opening portion 952 of the intake passage portion 95 of the right front panel 90 . The rear end opening 952 is in close contact with the front surface of the body portion 731 . The projecting portion 953 is in close contact with the front surface of the main body portion 731 (see FIG. 9). In this state, the right duct portion 72 is fixed to the right front panel 90 with a plurality of screws. As a result, the air intake passage portion 95 of the right front panel 90 and the air flow path inside the right duct portion 72 communicate with each other. Accordingly, an intake duct extending from the air inlet 951 of the intake passage portion 95 to the outlet 721 of the right duct portion 72 is formed.

In this manner, the insertion cylinder portion 735 of the right duct portion 72 is fitted inside the rear end opening 952 of the intake passage portion 95 of the right front panel 90 , and the right duct portion 72 is mounted so as to surround the insertion cylinder portion 735 . and the opening of the rear cylindrical portion 92 of the right front panel 90 are in close contact with each other, so that the insertion cylindrical portion 735 is doubly airtight.

Further, the fixing hole of the fixing piece 737 of the right duct portion 72 is positioned with respect to the fixing hole 941 at the rear end portion of the support column 94 projecting rearward from the back surface of the main body portion 91A of the right front panel 90, and the screw is tightened. be. As a result, the portion of the right duct portion 72 that protrudes upward is firmly supported by the support column 94 of the right front panel 90 . The structure for fixing the left duct portion 71 to the left front panel 80 is the same as the structure for fixing the right duct portion 72 to the right front panel 90, so description thereof will be omitted.

An example of a method of connecting the left tubular portion 42 and the right tubular portion 43 of the sensor case 40 and the left duct portion 71 and the right duct portion 72 will be described with reference to FIGS. 6 and 11 . The top plate 3 is placed so as to block the upper opening of the housing 2 . At this time, as shown in FIG. 6, the intake port 421 of the left tubular portion 42 of the sensor case 40 fixed to the lower surface of the top plate 3 is positioned at the outlet port 711 of the left duct portion 71, and the elastic body 422 ( 8) to make a tight connection. As a result, the air intake passage portion 85 of the left front panel 80, the air flow path in the left duct portion 71, and the inside of the left cylindrical portion 42 of the sensor case 40 can be communicated with each other. On the other hand, the intake port 431 of the right cylindrical portion 43 is positioned at the outlet port 721 of the right duct portion 72 and closely connected via an elastic body 432 (see FIG. 8). As a result, the intake passage portion 95 of the right front panel 90, the air flow path in the right duct portion 72, and the inside of the right cylindrical portion 43 of the sensor case 40 can be communicated with each other. In this state, the top plate 3 is fixed to the upper opening of the housing 2 with screws.

5 to 8, the flow of the air sucked from the air inlets 851, 951 of the air intake passages 85, 95 to the sensor case 40 will be described. In the stove 1, the temperature around the grill 10 rises when the grill 10 is used. Therefore, it is preferable to cool the electrical board 100 housed in the sensor case 40 and the nine sensors 31 to 39 . Therefore, the control section of the stove 1 drives both the left cooling fan in the left duct section 71 and the right cooling fan 75 in the right duct section 72 .

When the left cooling fan in the left duct portion 71 is driven, external air is sucked into the air intake passage portion 85 from the air inlet 851 at the front lower portion of the left front panel 80 . Since the air inlet 851 opens downward in the vicinity of the bottom surface of the housing 2 , it is possible to effectively prevent high-temperature air around the grill chamber 10 from being sucked into the intake passage portion 85 . The air sucked into the intake passage portion 85 flows rearward through the intake passage portion 85 as cooling air supplied toward the sensor case 40 . The cooling air exits from the rear end opening (not shown) of the intake passage portion 85 and flows upward inside the left duct portion 71 . The cooling air that has flowed through the left duct portion 71 flows inward from the intake port 421 of the left tubular portion 42 of the sensor case 40 .

When the right cooling fan 75 in the right duct portion 72 is driven, outside air is sucked into the intake passage portion 95 from the air inlet 951 at the front lower portion of the right front panel 90 . Since the air inlet 951 is also open downward near the bottom surface of the housing 2 , it is possible to effectively prevent high-temperature air around the grill chamber 10 from being sucked into the intake passage 95 . Further, as described above, since the main body portion 731 of the right duct portion 72 and the rear opening portion of the rear tubular portion 92 of the right front panel 90 are in close contact with each other, the insertion tubular portion 735 of the right duct portion 72 is doubly sealed. This effectively prevents the high-temperature air inside the housing 2 from flowing forward through the rear tubular portion 92 of the right front panel 90 and being sucked into the air inlet 951 . This configuration is the same on the left front panel 80 side.

The air sucked into the intake passage portion 95 flows rearward through the intake passage portion 95 as cooling air supplied toward the sensor case 40 . The cooling air exits from the rear end opening 952 of the intake passage portion 95 and flows upward through the right duct portion 72 . The cooling air that has flowed through the right duct portion 72 flows inward from the intake port 431 of the right cylindrical portion 43 of the sensor case 40 .

Here, as shown in FIG. 10, in the right front panel 90, when the operation portion 9 is pulled forward and used, the upper end side of the decorative plate 6D fixed to the front surface of the operation portion 9 falls forward. It is in an inclined state and is separated forward from the air inlet 951 of the intake passage portion 95 . In this case, sufficient air can be taken in from the air inlet 951 . On the other hand, as shown in FIG. 9, when the operating portion 9 is housed in the frame portion 91B of the right front panel 90, the decorative plate 6D is vertically upright. The front side of the air inlet 951 is closed. However, since a pair of inclined portions 96 are arranged on both left and right sides of the air inlet 951, air is sufficiently taken in from the lateral direction through a gap formed between the decorative plate 6D and the pair of inclined portions 96. be able to. Moreover, regardless of the posture of the operation unit 9, the air inlet 951 is open downward and is not blocked by the decorative plate 6D. Therefore, the stove 1 can sufficiently take air into the intake passage portion 95 from the air inlet 951 .

The flow of cooling air in the sensor case 40 will be described with reference to FIGS. 7 and 8. FIG. The cooling air that has flowed into the left tubular portion 42 is split by the left inlet 52 provided in the forward protruding portion 611 into the lower surface side and the upper surface side of the main body portion 41 at a predetermined ratio. On the other hand, the cooling air that has flowed into the right cylindrical portion 43 is also split by the right inlet 53 provided in the forward protruding portion 621 into the lower surface side and the upper surface side of the main body portion 41 at a predetermined ratio. In this embodiment, the heat resistance of the sensors 31-39 is lower than that of the electrical substrate 100 and the sensors 31-39. Furthermore, since the sensors 31 to 39 are located on the far side of the electrical board 100 , they are easily affected by the heat from the top flame burner 25 in the grill chamber 10 . For these reasons, in the present embodiment, the opening areas of the left inlet 52 and the right inlet 53 are determined such that the amount of air flowing through the sensor housing portion 60 is greater than the amount of air flowing through the substrate housing portion 50. good.

The flow of the cooling air diverted to the lower surface side of the main body 41 will be described. As shown in FIG. 8, the cooling air that has flowed from inside the left cylindrical portion 42 to the lower surface side of the main body portion 41 flows into the sensor housing portion 60 provided on the lower surface side of the rear side portion 45 from the left end side. The cooling air flows through the left sensor path 60A of the sensor accommodating portion 60 from the left end toward the center. As a result, the sensors 31-35 are cooled by the cooling air. The cooling air that has flowed toward the center through the left sensor path 60A flows out through the connection cylinder 68 provided in the center lid portion 653 . On the other hand, the cooling air that has flowed from inside the right cylindrical portion 43 to the lower surface side of the main body portion 41 flows into the sensor accommodating portion 60 from the right end side. The cooling air flows through the right sensor path 60B of the sensor accommodating portion 60 from the right end side toward the center side. As a result, the sensors 36-39 are cooled by the cooling air. The cooling air that has flowed toward the center through the right sensor path 60B flows out through the connection tube 68 provided in the center lid portion 653 . Since the elastic member 69 attached to the lower end of the connecting tube 68 is in close contact with the peripheral edge of the through hole 271 of the heat shield plate 27, cooling air is prevented from leaking outside through the gap between the connecting tube 68 and the through hole 271. can be prevented.

The cooling air that has flowed out through the connecting cylinder 68 flows rearward through the gap between the heat shield plate 27 and the upper wall 101 of the grill chamber 10 (see FIG. 3). As a result, it is possible to prevent high-temperature air from staying in the gap between the heat shield plate 27 and the upper wall 101 of the grill chamber 10, so that the temperature rise of the top plate 3 can be suppressed. The cooling air that has flowed backward through the gap flows into the duct portion 28 and is discharged to the outside through the grill exhaust port 281 and the exhaust port 7 together with the combustion exhaust from the grill chamber 10 .

The flow of the cooling air diverted to the upper surface side of the main body 41 will be described. As shown in FIG. 7, the cooling air that has flowed from inside the left cylindrical portion 42 to the upper surface side of the rear side portion 45 via the left inlet 52 of the forward projecting portion 611 flows into the substrate accommodating portion 50 from the left end side. . The cooling air flows through the left board path 50A of the board accommodation section 50 from the left end toward the center. As a result, the left half of the electrical board 100 is cooled by the cooling air. The cooling air that has flowed toward the center through the left substrate path 50A is discharged to the outside through the front discharge port 54A. On the other hand, the cooling air that has flowed from inside the right tubular portion 43 to the upper surface side of the rear side portion 45 via the right inlet 53 of the forward projecting portion 621 flows into the substrate accommodating portion 50 from the right end side. The cooling air flows through the right substrate path 50B of the substrate housing portion 50 from the right end toward the center. As a result, the right half of the electrical board 100 is cooled by the cooling air. The cooling air that has flowed toward the center through the right board path 50B is discharged to the outside through the front discharge port 54B. Here, the handle 8A of the grill door 8 is positioned below the front discharge ports 54A and 54B. The cooling air discharged from the front side discharge ports 54A, 54B flows toward the handle 8A. Thereby, since the handle 8A is cooled by the cooling air, it is possible to suppress the temperature rise.

Abnormal detection of the left cooling fan and the right cooling fan 75 based on the temperatures detected by the thermistors 301 and 302 will be described with reference to FIGS. 7 and 8. FIG. As shown in FIG. 8, the right sensor path 60B has five sensors 35-39 and cools more sensors 30 than the left sensor path 60A. The temperature is higher than the temperature of the cooling air flowing through the downstream end of left sensor path 60A. In addition, the length of the right sensor path 60B in the left-right direction is longer than the length of the left sensor path 60A in the left-right direction, and the partition wall 631 that serves as a boundary therebetween is located to the left of the center of the sensor case 40 in the left-right direction. . Therefore, the right sensor path 60B is more likely to be located above the grill chamber 10 than the left sensor path 60A, so that it is more likely to be warmed by the hot air from the grill chamber 10 . Therefore, the region of the sensor accommodating portion 60 where the temperature is the highest is the downstream end of the right sensor path 60B through which the cooling air flows. As described above, the thermistor 302 is provided near the sensor 39 and positioned at the downstream end of the right sensor path 60B. Furthermore, a connection tube 68 for discharging the cooling air that has flowed through the right sensor path 60B is arranged at the downstream end of the right sensor path 60B.

As a result, for example, when the right cooling fan 75 malfunctions, the amount of cooling air flowing through the right sensor path 60B decreases, so the detected temperature of the thermistor 302 rises. When the temperature detected by the thermistor 302 exceeds a predetermined threshold value, the control unit determines that the right cooling fan 75 is abnormal, and displays an error on the display unit of the right operation unit 12, for example. As a result, the inspector or the like can recognize that the right cooling fan 75 is abnormal, so that the right cooling fan 75 can be repaired or replaced quickly.

On the other hand, as shown in FIG. 7, in the board accommodating portion 50, the protrusion 51A that separates the left board path 50A and the right board path 50B is located slightly to the right of the center of the sensor case 40 in the left-right direction. Therefore, the left substrate path 50A is more likely to be positioned above the grill chamber 10 than the right substrate path 50B, so that it is more easily warmed by the hot air from the grill chamber 10 . Therefore, the area where the temperature is the highest in the substrate accommodating portion 50 is the downstream end portion of the left substrate path 50A through which the cooling air flows. The thermistor 302 is provided at the downstream end of the left substrate path 50A. The left substrate path 50A is a path on the left-right opposite side of the right sensor path 60B in which the thermistor 302 is provided.

A front discharge port 54A is arranged in the front region of the downstream end of the left substrate path 50A. Therefore, the thermistor 301 is located at substantially the same position as the front discharge port 54A in the left-right direction and behind the front discharge port 54A. As a result, similarly to the right cooling fan 75 described above, for example, when the left cooling fan malfunctions, the amount of cooling air flowing through the left substrate path 50A decreases, so the detected temperature of the thermistor 301 rises. When the temperature detected by the thermistor 301 exceeds a predetermined threshold value, the control unit determines that the left cooling fan is abnormal, and displays an error on the display unit of the left operation unit 11, for example. As a result, the inspector or the like can recognize that the left cooling fan is abnormal, so that the left cooling fan can be quickly repaired or replaced.

In addition, when the temperature of the cooling air flowing through the left sensor path 60A in which the thermistor is not provided in the sensor housing portion 60 rises, the temperature of the cooling air flowing in the left substrate path 50A in which the thermistor 301 is provided in the substrate housing portion 50 also rises. In addition, when the temperature of the cooling air flowing through the right side board path 50B in which the thermistor is not provided in the board accommodating portion 50 rises, the temperature of the cooling air flowing in the right side sensor path 60B in which the thermistor 302 is provided in the sensor accommodating portion 60 increases. also rises. Therefore, even if the cooling temperature flowing through any one of the left substrate path 50A, the right substrate path 50B, the left sensor path 60A, and the right sensor path 60B rises, the controller of the stove 1 controls the thermistors 301 and 302 respectively. Abnormalities of the left cooling fan and the right cooling fan 75 can be individually detected based on the detected temperature. Therefore, the stove 1 can individually detect the abnormality of the left cooling fan and the right cooling fan 75 by using the few thermistors 301 and 302, so that the manufacturing cost of the stove 1 can be suppressed.

As described above, the stove 1 of the above embodiment includes the housing 2 , the grill chamber 10 , the top plate 3 , the sensor case 40 , the left cooling fan, and the right cooling fan 75 . The sensor case 40 is provided on the lower surface of the top plate 3 so as to straddle the grill chamber 10 in the left-right direction, and supports the sensors 31 to 39 and the electrical board 100 on the lower surface of the top plate 3 . The left cooling fan supplies cooling air to the intake port 421 of the left tubular portion 42 of the sensor case 40 . The right cooling fan 75 supplies cooling air to the intake port 431 of the right tubular portion 43 of the sensor case 40 . The sensor case 40 includes a substrate housing portion 50 , a sensor housing portion 60 , front side discharge ports 54 A and 54 B, and a connection cylinder 68 . The sensor housing portion 60 extends in the left-right direction, and nine sensors 31 to 39 are arranged therein. The board accommodating portion 50 extends in the left-right direction and is provided side by side on the front side of the sensor accommodating portion 60 . The electrical board 100 is arranged inside the board accommodating portion 50 .

The connection tube 68 is arranged on the center side of the sensor housing portion 60 and discharges the cooling air that has flowed through the sensor housing portion 60 to the outside. The front-side outlets 54A and 54B are arranged on the central side of the substrate housing portion 50 and discharge the cooling air that has flowed through the substrate housing portion 50 to the outside. The sensor housing portion 60 has a left sensor path 60A on the inlet 421 side and a right sensor path 60B on the inlet 431 side. The substrate housing portion 50 has a left substrate path 50A on the inlet 421 side and a right substrate path 50B on the inlet 431 side. Cooling air is distributed to the left sensor path 60A and the left substrate path 50A from the left intake port 421 and flows toward the connection tube 68 and the front side discharge ports 54A and 54B. Cooling air is distributed to the right sensor path 60B and the right substrate path 50B from the right intake port 431 and flows toward the connection tube 68 and the front side discharge ports 54A and 54B. A thermistor 302 that detects the temperature of the cooling air is provided in the right sensor path 60B of the sensor housing portion 60 . A thermistor 301 that detects the temperature of the cooling air is provided in the left substrate path 50A of the substrate housing portion 50 .

With these configurations, when an abnormality occurs in the right cooling fan 75, the stove 1 can detect the abnormality based on the temperature detected by the thermistor 302, and when an abnormality occurs in the left cooling fan, it can be detected based on the temperature detected by the thermistor 301. Defects can be detected. Therefore, since the two thermistors 301 and 302 can individually detect the malfunction of the left cooling fan and the right cooling fan 75, the manufacturing cost of the stove 1 can be suppressed.

In the above description, the stove 1 is an example of the "cooking device" of the present invention. The sensor case 40 is an example of the "electric component support" of the present invention. The sensors 31-39 are examples of the "first electrical component" of the present invention. The electrical board 100 is an example of the "second electrical component" of the present invention. The right cooling fan 75 is an example of the "first cooling fan" of the present invention, and the left cooling fan is an example of the "second cooling fan" of the present invention. The sensor housing portion 60 (the left sensor path 60A and the right sensor path 60B) is an example of the "first cooling path" of the present invention. The substrate accommodating portion 50 (the left substrate path 50A and the right substrate path 50B) is an example of the "second cooling path" of the present invention. The connection cylinder 68 is an example of the "first discharge part" of the present invention, and the front side discharge ports 54A, 54B are an example of the "second discharge part" of the present invention. The left sensor path 60A is an example of the "first path" of the invention, and the right sensor path 60B is an example of the "second path" of the invention. The left substrate path 50A is an example of the "third path portion" of the present invention, and the right substrate path 50B is an example of the "fourth path portion" of the present invention. The thermistor 301 is an example of the "second thermistor" of the present invention, and the thermistor 302 is an example of the "first thermistor" of the present invention.

The present invention is not limited to the above embodiments, and various modifications are possible. The sensor case 40 of the above embodiment accommodates two types of electrical components, that is, the sensors 31 to 39 and the electrical substrate 100, but may accommodate other electrical components.

The sensor case 40 has a substrate housing portion 50 provided on the upper surface of the front side portion 44 of the body portion 41 and a sensor housing portion 60 provided on the lower surface of the rear side portion 45. The substrate housing portion 50 is provided on the upper surface of the rear side portion 45. The sensor housing portion 60 may be provided on the lower surface of the front side portion 44 .

When the temperature detected by the thermistor 302 exceeds a predetermined threshold, the control unit of the stove 1 determines that the right cooling fan 75 is abnormal, and displays an error on the display unit of the right operation unit 12. For example, a burning burner may be extinguished.

In the above-described embodiment, external air is taken in from the air inlet 851 of the left front panel 80 and the air inlet 951 of the right front panel 90, and the left duct part 71 and the right duct part 72 are used, so that the lower surface of the top plate 3 Although the air is supplied to the fixed sensor case 40 , the height position for taking in the outside air may be higher than the bottom surface of the housing 2 .

The sensor case 40 of the above-described embodiment discharges the cooling air that has flowed through the path in the board accommodating portion 50 forward from the front side discharge ports 54A and 54B, and the cooling air that has flowed through the path in the sensor accommodating portion 60 is discharged through the connection cylinder 68. However, the discharge direction can be changed in various ways. For example, they may be discharged in the same direction, or they may be discharged collectively from one discharge port. In addition, the discharge may not be limited to two directions, but may be branched in the middle and discharged in a plurality of directions.

The stove 1 of the above embodiment is a built-in stove, but it may be a table stove. Also, the number of stove burners is two in the above embodiment, but may be one or three or more.

The arrangement, number, and locations of the plurality of sensors 30 on the top plate 3 are not limited to those in the above embodiment, and can be freely changed. The central sensor 39 may be omitted. The sensor 30 is an infrared sensor that emits infrared light, but any sensor capable of detecting a foreign object may be used.

1 Stove 2 Housing 3 Top plate 10 Grill 31-39 Sensor 40 Sensor case 50 Board housing part 50A Left board path 50B Right board path 54A, 54B Front outlet 60 Sensor housing part 60A Left sensor path 60B Right sensor path 68 Connection Cylinder 75 Right cooling fan 100 Electrical board 301, 302 Thermistor 421, 431 Inlet

Claims (3)

a housing with an open top;
a grill storage provided on the center side of the housing;
A heating cooker comprising a top plate provided in the upper part of the housing so as to block the opening,
an electrical component support portion provided on the lower surface of the top plate so as to straddle the upper portion of the grill chamber in the left-right direction and supporting the first electrical component and the second electrical component on the lower surface of the top plate;
a first cooling fan that supplies cooling air to a first intake port provided at one end in the left-right direction of the electrical component support portion;
a second cooling fan that supplies the cooling air to a second intake port provided at the other end of the electrical component support portion;
The electrical component support portion is
a first cooling path extending in the left-right direction and having the first electrical component disposed therein;
a second cooling path extending in the left-right direction and provided side by side on the front side or the rear side of the first cooling path, in which the second electrical component is arranged;
a first discharge portion provided on the center side in the left-right direction for discharging the cooling air that has flowed through the first cooling path to the outside;
a second discharge part provided on the center side in the left-right direction and discharging the cooling air that has flowed through the second cooling path to the outside;
The first cooling path is
Having a first passage portion on the first intake side and a second passage portion on the second intake side,
The second cooling path is
Having a third passage portion on the first intake side and a fourth passage portion on the second intake side,
The cooling air is distributed and supplied from the first intake port to the first path portion and the third path portion, and flows toward the first discharge portion and the second discharge portion,
The cooling air is distributed and supplied from the second intake port to the second path portion and the fourth path portion, and flows toward the first discharge portion and the second discharge portion,
A first thermistor that detects the temperature of the cooling air flowing through the one path is provided in one of the first path and the second path,
Of the third path portion and the fourth path portion, the path portion on the left-right opposite side of the one path portion side in which the first thermistor is provided in the first cooling path has a path on the left-right opposite side. A heating cooker, further comprising a second thermistor for detecting the temperature of the cooling air flowing through the heating cooker. The one path portion is the first path portion,
The path portion on the opposite side is the fourth path portion,
The first thermistor is provided in a region of the first path portion where the first discharge portion is arranged,
2. The heating cooker according to claim 1, wherein the second thermistor is provided in a region of the fourth path portion where the second discharge portion is arranged. The first electrical component is plural,
The first path portion is formed longer in the left-right direction than the second path portion,
Among the plurality of first electrical components, a larger number of the first electrical components are arranged on the first path portion than the first electrical components arranged on the second path portion,
3. The heat cooking according to claim 2, wherein the first thermistor is provided in a region of the first path portion that is the farthest from the first intake port and in which the first discharge portion is arranged. vessel.

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