JP7164183B2 - Range food - Google Patents

Description

The present invention relates to range hoods.

There is a range hood with an automatic operation function that detects the upper temperature of the cooker with a temperature sensor provided in the hood and determines the air volume based on the detected temperature (see Patent Document 1).

JP 2012-137234 A

Such a range hood is provided with a temperature sensor at the center of the front side of the bottom surface of the hood. On the other hand, in general range hoods, the operation panel with switches is often provided in the center of the front of the hood so that it is easy to use whether the user is right-handed or left-handed. .

Therefore, if you want to add an automatic operation function that determines the air volume based on the detected temperature by upgrading a general range hood, if you try to install a temperature sensor in the center of the front side of the bottom part of the hood, the operation panel interfere. For this reason, there is a problem that a drastic design change is required and man-hours are required. Depending on the degree of design change, it is also necessary to change the mold, which poses a problem of high costs.

Therefore, the present invention provides a cooker hood that allows a temperature sensor to be placed while the operation panel remains at the same position, and that can detect the temperature above the cooker even if the temperature sensor is not positioned at the center. intended to provide

A range hood of the present invention for achieving the above object has a hood portion, an operation panel having switches, and one temperature sensor having a detection portion for detecting the upper temperature of the cooker. The operation panel is arranged in the center of the front side of the hood portion. The temperature sensor is arranged on the bottom surface of the receptacle so as to be shifted to either the left or right side of the operation panel, and the detection surface of the detection unit is arranged such that the side on which the temperature sensor is provided in the horizontal direction is one side and the other side is the other side. Assuming that one side is the other side, they are disposed so as to be slanted to face the other side with respect to the horizontal plane and to be slanted to face the rear side.

According to the present invention, the temperature sensor can be arranged while the operation panel remains at the same position, and the upper temperature of the cooker can be detected even if the temperature sensor is not positioned at the center.

It is a front view at the time of installing the cooker hood of this embodiment in a kitchen. It is a side view at the time of installing the cooker hood of this embodiment in a kitchen. It is a front view of the operation panel with which the cooker hood of this embodiment is provided. It is a perspective view showing a temperature sensor and a sensor cover. FIG. 3 is a perspective view showing the sensor cover separated from the temperature sensor, and further disassembled to show each constituent member of the temperature sensor; It is a front view showing a temperature sensor and a sensor cover. It is a side view showing a temperature sensor and a sensor cover. It is a bottom view showing a temperature sensor and a sensor cover. FIG. 4 is a cross-sectional view of the main parts showing the temperature sensor and the sensor cover attached to the receptacle; It is a perspective sectional view which notches and shows a part of sensor cover. 11A and 11B are a front view and a side view showing an example of a monocular infrared sensor. 1 is a perspective view showing an example of a compound eye infrared sensor; FIG. FIG. 4 is a diagram schematically showing how the temperature sensor detects the upper temperature of the cooker. FIG. 10 is a diagram schematically showing a detection area on the cooker when the temperature sensor is displaced from the center and arranged in the hood, and the detection part of the temperature sensor is three-dimensionally twisted and inclined. FIG. 4 is a diagram schematically showing the detection area of the temperature sensor when the separation distance between the hood portion and the cooker is the minimum allowable distance; FIG. 4 is a diagram schematically showing the detection area of the temperature sensor when the separation distance between the hood portion and the cooker is the median value between the minimum allowable distance and the maximum allowable distance; FIG. 4 is a diagram schematically showing the detection area of the temperature sensor when the separation distance between the hood portion and the cooker is the maximum allowable distance; It is a block diagram of the control system of the cooker hood of this embodiment. 4 is an operation flowchart relating to control of fan air volume and/or filter rotation speed in the cooker hood of the present embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the invention is not limited to only the following embodiments. In addition, each drawing is exaggerated and expressed for convenience of explanation. Therefore, the dimensional ratio of each component in each drawing differs from the actual one. In the drawings, the same elements are denoted by the same reference numerals, and duplicate descriptions are omitted in the specification.

(Configuration of mechanical system of cooker hood 100)
1 and 2 are a front view and a side view when the range hood 100 according to the present embodiment is installed in a kitchen, and FIG. 3 is a front view of an operation panel 120 included in the range hood 100. FIG. 4 to 10 are diagrams used to describe the temperature sensor 300 and the sensor cover 400, FIG. 4 is a perspective view showing the temperature sensor 300 and the sensor cover 400, and FIG. 3 is a perspective view separated from the temperature sensor 300 and showing each constituent member of the temperature sensor 300 exploded. FIG. 6, 7, and 8 are a front view, a side view, and a bottom view showing temperature sensor 300 and sensor cover 400. FIG. FIG. 9 is a cross-sectional view of essential parts showing temperature sensor 300 and sensor cover 400 attached to receptacle 140, and FIG. 10 is a perspective cross-sectional view showing sensor cover 400 with a part cut away.

1 and 2, range hood 100 includes hood portion 140 positioned above cooker 200, operation panel 120 having switches, and detection portion 310 for detecting the temperature above cooker 200. and a temperature sensor 300 . The cooker hood 100 absorbs odors, smoke, odors including oil, and greasy smoke generated during cooking in the cooker 200 and exhausts them to the outside. The illustrated cooker 200 has three heat sources 210 (collectively the three heat sources 210A, 210B, 210C described below) and a grill outlet 220 . In this specification, the heat source 210 means a burner or a trivet near the burner for the gas cooker 200, and a heater for the IH cooker 200, respectively.

The range hood 100 includes a hood portion 140 and a body portion 110 on the upper portion of the hood portion 140 . The hood portion 140 collects odors and oily smoke generated by cooking, and the body portion 110 exhausts the collected odors and oily smoke. The hood portion 140 is provided with an intake port 112 for sucking odors and greasy smoke generated by cooking, and the main body portion 110 is provided with an exhaust port 114 that communicates with the outside and a passage that connects the intake ports 112 and the exhaust ports 114. A fan 116 is provided for sucking and exhausting oily smoke. Fan 116 is driven by fan motor 117 . A rotating filter (disk) 118 is provided between the intake port 112 and the fan 116 or at the intake port 112 to remove oil from the soot sucked from the intake port 112 . Filter 118 is driven by filter motor 119 . Note that the range hood 100 can be operated by rotating only the fan 116, rotating both the fan 116 and the filter 118, or rotating only the filter 118. FIG. Moreover, the range hood 100 may be provided with a fixed (ordinary) filter that does not rotate, or may be a filterless range hood 100 . The range hood 100 has an operation panel 120 for instructing the operation of the range hood 100 . The operation panel 120 is arranged in the center of the front side of the hood portion 140 .

Referring to FIG. 3, operation panel 120 has, as switches, operation switch 121, air volume switch 122, air volume automatic switch 123, timer switch 124, lighting switch 125, constant ventilation switch 126, and the like.

The operation switch 121 is a switch for operating the range hood 100 . When the operation switch 121 is pressed, a range hood ON signal is transmitted (to a control unit described later), and when the switch is pressed again, a range hood OFF signal is transmitted. The air volume switch 122 is a switch for manually switching the air volume of the fan 116 between weak, medium and strong. The automatic air volume switch 123 automatically switches the air volume of the fan 116 and the rotation speed of the filter 118 stepwise or continuously according to the upper temperature of the cooker 200 detected by the temperature sensor 300. It is a switch for Note that this automatic operation is canceled when the air volume switch 122 is pressed. Timer switch 124 is a switch for rotating fan 116 and filter 118 after cooking is finished. The illumination switch 125 is a switch for turning on/off the LED light bulb that illuminates the upper surface of the cooker 200 . The constant ventilation switch 126 is a switch for operating/stopping constant ventilation by manually rotating/stopping the fan 116 .

The temperature sensor 300 is arranged on the bottom surface portion 141 of the hood portion 140 so as to be shifted to either the left or right side of the operation panel 120 . In this embodiment, the temperature sensor 300 is shifted to the left side of the operation panel 120 (see FIG. 1). The temperature sensor 300 is arranged closer to the front side of the bottom portion 141 of the receptacle 140 (see FIG. 2).

4 to 9, temperature sensor 300 includes detection portion 310 for detecting the temperature above cooker 200, case body 320 housing detection portion 310, and a lid closing upper opening 321 of case body 320. a portion 330; The detection unit 310 is composed of an infrared sensor. The case body 320 has a support portion 322 on which the detection portion 310 is placed. Lid portion 330 has leg portion 331 that sandwiches detection portion 310 between support portion 322 of case body 320 and leg portion 331 . When the lid portion 330 is attached to the upper opening 321 of the case body 320 , the detection portion 310 is sandwiched between the support portion 322 and the leg portion 331 . A bottom portion 141 of the hood portion 140 is parallel to the horizontal plane. Case body 320 is arranged on receptacle 140 such that its lower surface is parallel to bottom surface 141 of receptacle 140 . In a state in which temperature sensor 300 is arranged on bottom surface portion 141 of receptacle 140, detection portion 310 is arranged so as to be three-dimensionally twisted and inclined with respect to a horizontal plane. More specifically, if the side on which temperature sensor 300 is provided is one side and the other side is the other side in the horizontal direction, the detection surface of detection section 310 is inclined so as to face the other side with respect to the horizontal plane, and is rearward. It is slanted to face the side.

The cooker hood 100 further has a sensor cover 400 arranged on the detection surface side of the temperature sensor 300 . A general infrared sensor is a unit in which a lens is attached to a substrate on which electronic components are mounted. The sensor cover 400 is essential for a device such as the cooker hood 100 that is installed in an environment where oily smoke and dust are generated.

Referring to FIG. 9, hood portion 140 has panel 150 . This panel 150 has a surface 150a forming a bottom portion 141 visible to the cook, and a through hole 151 extending therethrough. The sensor cover 400 is sandwiched between the back surface 150 b of the panel 150 and the pressing portion 160 in a state facing the through hole 151 . In this embodiment, the holding portion 160 is the case body 320 of the temperature sensor 300 . When the sensor cover 400 is held between the back surface 150b of the panel 150 and the holding portion 160, the sensor cover 400 is arranged parallel to the horizontal plane.

The sensor cover 400 has a substantially rectangular plate shape. The sensor cover 400 has a projecting portion 410 having an outer peripheral shape corresponding to the inner peripheral shape of the through hole 151 at its central portion. The height of the protrusion 410 is the same as the thickness of the panel 150 . The height of the projection 410 does not need to be physically the same as the plate thickness of the panel 150. When the sensor cover 400 is attached, the surface 410a of the projection 410 of the sensor cover 400 and the surface of the panel 150 150a can be substantially flush with each other. Surface 410 a of protrusion 410 may protrude slightly from surface 150 a of panel 150 or may be recessed from surface 150 a of panel 150 . Since the surface 410a of the projecting portion 410 and the surface 150a of the panel 150 are substantially flush with each other, and the boundary between the inner circumference of the punch hole 151 and the outer circumference of the projecting portion 410 can be narrowed, the design is good, and it is easy to wipe clean. Cleanability is improved.

Sensor cover 400 has two pins 420 protruding toward case body 320 . The lower surface of case body 320 has holes 323 into which two pins 420 are fitted. Sensor cover 400 is positioned with respect to temperature sensor 300 by fitting two pins 420 into holes 323 .

A material for forming the sensor cover 400 is a resin material. The material for forming the sensor cover 400 is not limited as long as it is a material that transmits infrared rays at a certain level, and examples include a single crystal silicon sheet and a resin material. Considering ease of molding and cost reduction, it is preferable that the material for forming the sensor cover 400 is a resin material. Examples of resin materials include high-density polyethylene and PTFE. The thickness is not particularly limited, but is preferably 1 mm or more because too thin a thickness may cause breakage.

4, 5 and 9, the lower surface of case body 320 of temperature sensor 300 is formed with first surface 324 for pressing sensor cover 400 against panel 150 and screw holes 326 for fixing to panel 150. and a second surface 325 which is formed. Two pins 327 are formed on the second surface 325 . The first surface 324 and the second surface 325 have different heights, forming a step. The panel 150 is formed with steps corresponding to the step shape of the lower surface of the case body 320 . The panel 150 has a first mounting portion 152 facing the first surface 324 of the case body 320 and a second mounting portion 153 facing the second surface 325 of the case body 320 . The lower surface of the first attachment portion 152 of the panel 150 is the surface 150a that constitutes the bottom portion 141 that is visible to the cook. A through hole 151 is formed in the first mounting portion 152 of the panel 150 . A second mounting portion 153 of the panel 150 is spaced upward from the first mounting portion 152 . The second attachment portion 153 of the panel 150 is penetrated by the first through hole 154 communicating with the screw hole 326 of the second surface 325 of the case body 320 and the two pins 327 of the second surface 325 of the case body 320. It has a second through hole (not shown).

The temperature sensor 300 is pressed from the inside of the panel 150 against the rear surface 150b. At this time, the soft sensor cover 400 is sandwiched between the panel 150, which is the outer shell member of the product, and the case body 320 having strength. Thereby, it is possible to prevent the sensor cover 400 from being deformed by being touched. Even if the case body 320 is made of inexpensive resin such as ABS, a certain strength can be ensured depending on the thickness and shape.

As shown in FIG. 9 , the sensor case body 320 is fixed to the second mounting portion 153 of the panel 150 by a fastening screw 181 as the fixing portion 180 . After fixing the temperature sensor 300 to the panel 150, the inner panel 170 forming the bottom portion 141 of the hood portion 140 is attached. The inner panel 170 hides the second mounting portion 153 and the fastening screw 181 of the panel 150 .

11A and 11B show an example of a monocular infrared sensor 341, and FIG. 12 shows an example of a compound eye infrared sensor 342. FIG.

As illustrated, the general infrared sensors 341 and 342 have a detection field of view in the range of a quadrangular pyramid. When temperature sensor 300 is displaced to the left or right from the center and arranged in hood portion 140 , the detection area of detection portion 310 needs to be directed toward the center of cooker 200 . For this reason, the sensing portion 310 of the temperature sensor 300 is arranged so as to be three-dimensionally twisted and inclined with respect to the horizontal plane.

Temperature sensor 300 senses the temperature in the region indicated by the dashed lines in FIGS. The temperature sensor 300 used in this embodiment is composed of a compound eye temperature sensor that detects the temperature above the cooker 200 with a plurality of pixels. The compound eye temperature sensor has, for example, 8×8=64 pixels and can separately detect the temperature of an area corresponding to each pixel. The temperature sensor 300 can detect the upper temperature of the cooker 200 by dividing it into 64 areas, and can detect the temperature of each of the three heat sources 210 individually. As a compound eye temperature sensor, for example, a compound eye infrared sensor 342 can be exemplified. The compound eye temperature sensor is not limited to having 8×8=64 pixels as illustrated, and a compound eye temperature sensor having more pixels may be used.

In this embodiment, a compound eye temperature sensor is used as the temperature sensor 300, but a monocular temperature sensor may be used. If a monocular temperature sensor is used, one monocular temperature sensor is provided to sense the average temperature of the three heat sources 210 . For actual installation, a compound eye temperature sensor is preferable to a single eye temperature sensor. This is because the compound eye temperature sensor can detect temperature more precisely due to the difference in the number of pixels between the compound eye temperature sensor and the single eye temperature sensor, and the compound eye temperature sensor has better detection accuracy than the single eye temperature sensor.

FIG. 13 is a diagram schematically showing how temperature sensor 300 senses the upper temperature of cooker 200 . Since the temperature sensor 300 is attached to the bottom portion 141 of the cooker hood 100, the temperature above the cooker 200 is detected by the heat sources 210 of the cooker 200 (burners, trivets or heaters near the burners) 210A, 210B, 210C and It is detected in the area covering the outlet 220 of the grill. Since the compound eye temperature sensor is used in this embodiment, the temperatures of the heat sources 210A, 210B, and 210C of the cooker 200 are, for example, divided into 8×8=64 pixels (Tij (i=1 ˜8, j=1˜8)) are detected as the temperatures of regions corresponding to the heat sources 210A, 210B, and 210C, respectively. On the other hand, when the temperature sensor 300 is a monocular temperature sensor, one monocular temperature sensor detects the average temperature of the three heat sources .

FIG. 14 schematically shows a detection area on cooker 200 when temperature sensor 300 is displaced from the center and placed in hood portion 140, and detection portion 310 of temperature sensor 300 is twisted and tilted three-dimensionally. is a diagram shown in FIG. The temperature sensor 300 is arranged in the receptacle 140 with a left or right shift from the center, and the detection part 310 of the temperature sensor 300 is three-dimensionally twisted and inclined with respect to the horizontal plane. The detection area on the cooker 200 at this time is as schematically shown in FIG. The shape of the pixels cut by the cooker 200 surface is a simple rectangle. Here, "simple quadrangle" means a quadrangle having two sets of opposite sides that are not parallel, but not a square, a rectangle, a trapezoid, or a rhombus. In addition, the size of the pixels varies depending on the distance between the hood part 140 and the cooker 200 (see symbol H in FIG. 1). The area of the pixel increases as the separation distance H increases, and decreases as the separation distance H decreases.

15 and 16 are diagrams schematically showing detection areas of temperature sensor 300 when distance H between hood portion 140 and cooker 200 is different. The hood part 140 can be installed in the kitchen within a range from the minimum permissible distance to the maximum permissible distance, the separation distance H from the cooker 200 . The minimum permissible distance is, for example, 600 mm, and the maximum permissible distance is, for example, 1000 mm. In this case the median value between the minimum and maximum allowable distance is 800 mm.

As shown in FIG. 15, the temperature sensor 300 detects an area of more than half of the central portion of the heat source 210 of the cooker 200 based on the minimum allowable distance (for example, 600 mm) of the separation distance H. is arranged in a state capable of detecting the upper temperature in the As described above, the pixel area increases as the separation distance H increases. As shown in FIG. 16, when the separation distance H is the median value (for example, 800 mm), the detection area of the temperature sensor 300 is wider than the detection area for the minimum allowable distance (for example, 600 mm). It becomes possible to detect the upper temperature in a wider range. As shown in FIG. 17, when the separation distance H is the maximum allowable distance (for example, 1000 mm), the detection area of the temperature sensor 300 becomes wider than the detection area for the median value (for example, 800 mm). , the upper temperature can be detected in a wider range. By defining the detection range of the temperature sensor 300 based on the case where the separation distance H is the minimum allowable distance, the temperature sensor 300 can detect the distance H within the range from the minimum allowable distance to the maximum allowable distance. The upper temperature of cooker 200 can be detected. That is, if the hood part 140 is installed in the kitchen within the range of the allowable separation distance H, the temperature sensor 300 can detect the actual separation distance H without inputting the actual separation distance H into the range hood 100 after the range hood 100 is installed. Upper temperature can be sensed.

As shown in FIG. 16, the temperature sensor 300 moves forward and backward at the center of the cooker 200 in the left-right direction with respect to the center value (for example, 800 mm) between the minimum allowable distance and the maximum allowable distance. A cooker center line 230 extending in the direction and a detection range center line 350 extending in the front-rear direction at the center of the detection range of the temperature sensor 300 in the left-right direction are arranged so as to be able to coincide with each other. In this way, by aligning the detection range center line 350 of the temperature sensor 300 with the cooker center line 230 based on the case where the separation distance H is the median value, the temperature sensor 300 can detect the separation distance H from the minimum allowable distance. The upper temperature of cooker 200 can be stably detected within the range up to the maximum allowable distance.

The temperature sensor 300 of this embodiment is composed of a compound eye temperature sensor. As shown in FIGS. 15 to 17 , the temperature sensor 300 is arranged such that the pixels on the front side of the cooker's side in the square detection area form a straight line parallel to the front side of the cooker 200 . The pixels on the front side of the temperature sensor 300 on the cook side are located on the front side (cooker side) of a line passing through the center of the heat source 210 on the front side and extending in the horizontal direction parallel to the outer peripheral edge of the cooker 200 . The side to align is indicated by numeral 231 in FIGS. 15-17. By arranging the temperature sensor 300 in the state described above, the distortion and size of each pixel are minimized at any separation distance H. FIG. Therefore, the difference in detection accuracy for each pixel is reduced. This eliminates the need for correction based on the difference in distance between each pixel of temperature sensor 300 and cooker 200 . Even if correction is necessary, it can be minimized. In addition, by arranging the temperature sensor 300 in the above state, even if an inexpensive infrared sensor that looks like a square pyramid is used and the size of the detection area changes depending on the separation distance H, general cooking can be performed. The heat source of the vessel 200 can be detected.

Note that the above-mentioned "parallel" does not need to be physically parallel, as long as correction based on the difference in distance between each pixel of temperature sensor 300 and cooker 200 can be eliminated or simplified. It is sufficient if the pixels on the front side of the cooker are laid out in a straight line and the straight line is substantially parallel to the front side of the cooker 200 (see side 231 to be aligned).

As shown in FIG. 9, the sensing portion 310 of the temperature sensor 300 is arranged at an angle with respect to the horizontal plane. The sensor cover 400 is arranged parallel to the horizontal plane. The temperature sensor 300 is composed of a compound eye temperature sensor. In such a case, when the thickness of the sensor cover 400 is uniform, since the infrared transmission distance differs for each pixel, an error occurs between the detected temperature and the actual temperature for each pixel.

Therefore, the thickness of sensor cover 400 is preferably thicker at a portion closer to cooker 200 than at a portion farther from cooker 200 . More specifically, on the front side of the bottom surface portion 141 of the hood portion 140, the side on which the temperature sensor 300 is provided in the left-right direction is defined as one side, and the other side is defined as the other side. Thick. Or/and the front side of the sensor cover 400 is thicker than the rear side. With this configuration, the infrared transmission distance in the sensor cover 400 is the same for each pixel. Therefore, an error caused by a difference in distance between each pixel of temperature sensor 300 and cooker 200 can be corrected.

Even when temperature sensor 300 is composed of a monocular temperature sensor, as described above, sensor cover 400 has a thickness greater than that of a portion farther from cooker 200 than a portion farther from cooker 200. It is preferable that the portion closer to the . This is because an error caused by a difference in distance between each pixel of the temperature sensor 300 and the cooker 200 can be corrected.

(Configuration of control system of cooker hood 100)
FIG. 18 is a block diagram of the control system of the cooker hood 100 of this embodiment. Range hood 100 has fan 116 , fan motor 117 , filter 118 , filter motor 119 , operation panel 120 , controller 130 , and temperature sensor 300 . Note that the control unit 130 includes a threshold temperature storage unit 135 and is built into the range hood 100 .

The configurations and functions of fan 116, fan motor 117, filter 118, filter motor 119, operation panel 120, and temperature sensor 300 are as described above.

The threshold temperature storage unit 135 stores a threshold temperature for changing the air volume of the fan 116 and/or the rotational speed of the filter 118 . The threshold temperature storage unit 135 stores the threshold temperature corresponding to each region of the upper temperature detected by the temperature sensor 300 .

When the automatic air volume switch 123 (see FIG. 3) of the operation panel 120 is pressed and the range hood 100 is automatically operated, the control unit 130 stores the upper temperature of the cooker 200 detected by the temperature sensor 300 and the threshold temperature storage unit. 135 to the threshold temperature stored in 135 (for the fan) to determine the airflow of the fan 116 . Control unit 130 also compares the upper temperature of cooker 200 detected by temperature sensor 300 with the threshold temperature (for the filter) stored in threshold temperature storage unit 135, and determines the number of rotations of filter 118. . In this embodiment, the control unit 130 determines both the air volume of the fan 116 and the rotation speed of the filter 118, but the control unit 130 may determine either one. Further, in the case of a filterless range hood that does not have the filter 118 or a range hood that has a fixed filter, the control unit 130 only determines the air volume of the fan 116 .

Control unit 130 sets the threshold temperature so that the pixels in which the distance between temperature sensor 300 and cooking appliance 200 is far are lower than the threshold temperatures in pixels where the distance between temperature sensor 300 and cooking appliance 200 is short. set. More specifically, on the front side of the bottom surface portion 141 of the hood portion 140, if the temperature sensor 300 is provided on one side in the horizontal direction and the other side is the other side, the temperature threshold of each pixel of the temperature sensor 300 is set on one side. is corrected so that the temperature threshold on the other side is lower than the temperature threshold on the other side. Or/and the temperature threshold of each pixel of the temperature sensor 300 is corrected so that the temperature threshold on the rear side is lower than the temperature threshold on the front side.

The reason why the temperature threshold needs to be corrected is as follows. The closer the distance between each pixel of temperature sensor 300 and cooker 200, the narrower the detection range detected by one pixel, and the farther the distance between each pixel and cooker 200, the wider the detection range detected by one pixel. . For example, in FIG. 17, the lower left pixel has a smaller square area, while the upper right pixel has a larger square area. This is because the compound eye temperature sensor captures the average temperature of each pixel as the temperature of that pixel, so the larger the area of the square, the lower the average temperature that is detected. Therefore, the threshold temperature is set to pixels with a long distance between temperature sensor 300 and cooking appliance 200 ( That is, by correcting so that the area of the mass is larger, the error caused by the difference in the distance between each pixel of the temperature sensor 300 and the cooker 200 can be corrected.

The temperature sensor 300 generates an electrical signal when the detection unit 310 receives infrared rays emitted from an object. The temperature of the object is determined by converting the electrical signal output from the temperature sensor 300 into temperature. The "threshold temperature" in this specification includes not only the temperature converted from the electrical signal, but also the electrical signal itself output from the temperature sensor 300 corresponding to the temperature. Therefore, "correction of the threshold temperature" may correct the temperature converted from the electric signal, or may correct the electric signal itself, and any pattern is included.

As shown in FIGS. 15 to 17, since the temperature sensor 300 is not installed directly above the center of the cooking surface of the cooker 200, the temperature detection range of each region of the temperature sensor 300 is shown in these figures. Distort as shown. Therefore, due to the difference in separation distance H between cooker 200 and range hood 100, for example, even with the same heat source 210A, the area where temperature sensor 300 detects the temperature of heat source 210 shifts. Similarly, even for the same grill outlet 220, the area where the temperature sensor 300 detects the temperature of the grill outlet 220 is shifted.

Due to this deviation, it is not possible to accurately identify the position of the outlet of the grill. Therefore, when it is desired to accurately specify the positions and number of the heat sources 210 and the positions of the air outlets of the grill, the storage unit of the control unit 130 stores the positions of the heat sources 210 and the air outlets 220 of the grill for each separation distance H. Information as to which region of the temperature sensor 300 the position corresponds to may be stored. In this case, the separation distance H can be set when the cooker hood 100 is installed on site.

The control unit 130 sets the threshold temperature to be lower when the separation distance H is large than when the separation distance H is small.

(Operation of control unit 130)
FIG. 19 is an operation flowchart relating to control of the air volume of the fan 116 and/or the rotational speed of the filter 118 in the range hood 100 of this embodiment. This operation flowchart is processed by the control unit 130 . This operation flowchart is executed when the automatic air volume switch 123 of the operation panel 120 (see FIGS. 3 and 18) is pressed and the range hood 100 is automatically operated.

Control unit 130 detects the upper temperature of cooker 200 with temperature sensor 300 (S100). The upper temperature is sensed region by region. Specifically, as shown in FIG. 13, the temperature of all regions Tij=T11 to T88 of the temperature sensor 300 is detected.

Next, the control unit 130 compares the detected upper temperature of the cooker 200 with the threshold temperature stored in the threshold temperature storage unit 135 (S110). Next, control unit 130 controls the air volume of fan 116 and/or the rotational speed of filter 118 according to the comparison result between the upper temperature of cooker 200 and the threshold temperature (S120). In this case, the higher the upper temperature of cooker 200, the higher the air volume of fan 116 and/or the rotation speed of filter 118, and the lower the upper temperature of cooker 200, the higher the air volume of fan 116 and/or the rotation speed of filter 118. become smaller. In this manner, the air volume of the fan 116 and the number of rotations of the filter 118 can be determined based on the upper temperature detected by the temperature sensor 300, and automatic operation can be performed.

Control unit 130 sets the threshold temperature so that the pixels in which the distance between temperature sensor 300 and cooking appliance 200 is far are lower than the threshold temperatures in pixels where the distance between temperature sensor 300 and cooking appliance 200 is short. set. By changing the threshold temperature according to the distance between each pixel of the temperature sensor 300 and the cooker 200 in this way, the error caused by the difference in the distance between each pixel of the temperature sensor 300 and the cooker 200 is corrected. can do.

The control unit 130 sets the threshold temperature to be lower when the separation distance H is large than when the separation distance H is small. By changing the threshold temperature according to the separation distance H in this way, the error caused by the difference in the separation distance H can be corrected. In addition, the position and number of each heat source 210, whether or not the grill is used, the position of the outlet 220 of the grill, etc. can be more accurately grasped.

(type of range hood)
Range hoods are classified into "deep type", "flat type", "thin type", "falcon type", "square type", "lower type", etc. according to the shape of the outer shell. The present invention is applicable to any kind of range hood.

As described above, range hood 100 includes hood portion 140 , operation panel 120 including switches, and temperature sensor 300 including detection portion 310 for detecting the upper temperature of cooker 200 . The operation panel 120 is arranged in the front center of the hood portion 140 , and the temperature sensor 300 is arranged on the bottom surface portion 141 of the hood portion 140 so as to be shifted to either the left or right side of the operation panel 120 . The detection unit 310 is arranged so as to be three-dimensionally twisted and inclined with respect to the horizontal plane.

With this configuration, the temperature sensor 300 can be provided while the switches of the operation panel 120 remain at the same position, so that the design change can be minimized. Also, since there is no need to change the mold, costs can be reduced. Furthermore, the upper temperature of cooking appliance 200 can be detected even if temperature sensor 300 is not positioned at the center. In this way, the temperature sensor 300 can be arranged while the operation panel 120 remains at the same position, and even if the position of the temperature sensor 300 is not in the center, the temperature above the cooker 200 can be detected. A hood 100 can be provided. Moreover, the switches and lighting provided on the centrally arranged operation panel 120 can be mounted on the hood portion 140 without being affected by the installation of the temperature sensor 300, and can be designed.

The hood part 140 can be installed within a range from the minimum allowable distance to the maximum allowable distance, the separation distance H from the cooker 200 . Temperature sensor 300 is arranged in a state in which it is possible to detect the upper temperature in an area of half or more of the center of heat source 210 of the total area of cooker 200 based on the case where separation distance H is the minimum allowable distance.

With this configuration, temperature sensor 300 can detect the upper temperature of cooker 200 within the range of separation distance H from the minimum allowable distance to the maximum allowable distance.

The temperature sensor 300 detects a cooker center line 230 extending in the front-rear direction at the center of the cooker 200 in the left-right direction with reference to when the separation distance H is the median value between the minimum allowable distance and the maximum allowable distance. , and a detection range center line 350 extending in the front-rear direction at the center of the detection range of the temperature sensor 300 in the left-right direction.

With this configuration, temperature sensor 300 can stably detect the upper temperature of cooker 200 within the range of separation distance H from the minimum allowable distance to the maximum allowable distance.

Temperature sensor 300 is composed of a compound eye temperature sensor that detects the temperature above cooker 200 with a plurality of pixels. The temperature sensor 300 is arranged so that the pixels on the front side of the cooker form a straight line parallel to the front side of the cooker 200 .

With this configuration, the difference in detection accuracy between pixels is reduced. This eliminates the need for correction based on the difference in distance between each pixel of temperature sensor 300 and cooker 200 . Even if correction is necessary, it can be minimized.

The cooker hood 100 further has a sensor cover 400 arranged on the detection surface side of the temperature sensor 300 . The temperature sensor 300 is composed of a compound eye temperature sensor that detects the upper temperature of the cooker 200 with a plurality of pixels, and the sensor cover 400 is arranged parallel to the horizontal plane. The thickness of sensor cover 400 is thicker at a portion closer to cooker 200 than at a portion farther from cooker 200 .

By configuring in this way, an error caused by a difference in distance between each pixel of temperature sensor 300 and cooker 200 can be corrected.

The range hood 100 has a control unit 130 that controls the operating state of the range hood 100 by comparing the upper temperature detected by the temperature sensor 300 with a preset threshold temperature. The temperature sensor 300 is composed of a compound eye temperature sensor. The threshold temperature is lower for pixels where the distance between temperature sensor 300 and cooking appliance 200 is longer than for pixels where the distance between temperature sensor 300 and cooking appliance 200 is short. Controlling the operating state of the range hood 100 means controlling only the air volume of the fan 116, controlling both the air volume of the fan 116 and the rotation speed of the filter 118, and controlling only the rotation speed of the filter 118. contains any of the

By changing the threshold temperature according to the distance between each pixel of the temperature sensor 300 and the cooker 200 in this way, when controlling the operating state of the range hood 100, each pixel of the temperature sensor 300 and the cooker 200 can be corrected for the error caused by the difference in distance between

The range hood 100 has a control unit 130, and the threshold temperature is lower when the separation distance H is large than when the separation distance H is small.

By changing the threshold temperature according to the separation distance H in this way, it is possible to correct an error caused by the difference in the separation distance H when controlling the operating state of the range hood 100 .

The control unit 130 of the cooker hood 100 of the embodiment also controls the rotational speed of the filter 118 by comparing the upper temperature detected by the temperature sensor 300 with a preset threshold temperature. Therefore, based on the upper temperature detected by the temperature sensor 300, the control unit 130 controls only the air volume of the fan 116, controls both the air volume of the fan 116 and the rotational speed of the filter 118, and controls the rotation speed of the filter 118. Any automatic operation can be performed by controlling the number of revolutions only.

In the range hood 100 of the above-described embodiment, the thickness of the sensor cover 400 is adjusted to compensate for the difference in the distance between each pixel of the temperature sensor 300 and the cooker 200. A portion closer to the cooking appliance 200 is thicker than a portion farther away. When the thickness of the sensor cover 400 is made uniform, the thickness through which infrared rays pass is different in the infrared rays passing region of the sensor cover 400 assigned to each pixel. That is, each pixel has a different infrared transmittance. In this case, the correct temperature of each pixel can be derived by confirming the transmittance of each pixel in advance using a blackbody furnace or the like and using the obtained value as a correction value in the control program.

Since the temperature sensor 300 is composed of a compound eye temperature sensor, in addition to the above correction value, a correction may be added to lower the temperature of pixels to be reacted more excessively. When the temperature is corrected to be lower, it becomes difficult to exceed the threshold temperature and the operation becomes difficult accordingly. The reverse is also true.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be embodied in various forms based on the technical ideas described in the claims. , of course, are also within the scope of the present invention.

100 range hood,
110 main body,
112 air intake,
114 exhaust port,
116 fans,
117 fan motor,
118 filters;
119 filter motor,
120 operation panel,
130 control unit,
135 threshold temperature storage unit,
140 hood section,
141 bottom part,
150 panels,
150a surface,
150b back side,
151 vent,
152 first mounting portion,
153 second mounting portion,
180 fixed part,
181 fastening screw,
200 cooker,
230 cooker centerline,
231 side to align,
300 temperature sensor,
310 detection unit,
320 case body,
321 top opening,
322 support,
323 hole,
324 first side,
325 second side,
326 screw holes,
327 pins,
330 lid,
331 legs,
350 detection range center line,
400 sensor cover,
410 protrusion,
410a surface,
420 pins,
H Separation distance.

Claims (7)

a hood;
an operation panel with switches;
a temperature sensor having a detection unit that detects the upper temperature of the cooker,
The operation panel is arranged in the center of the front side of the hood,
The temperature sensor is arranged on the bottom surface of the receptacle so as to be shifted to either the left or right side of the operation panel, and the detection surface of the detection unit is arranged such that the side on which the temperature sensor is provided in the horizontal direction is one side and the other side is the other side. A range hood , which is disposed so as to be slanted so as to face the other side with respect to a horizontal plane and to be slanted so as to face the rear side when one side is the other . The hood part can be installed within a range from a minimum allowable distance to a maximum allowable distance from the cooker,
The temperature sensor is arranged in a state in which it is possible to detect an upper temperature in an area of more than half of the total area of the cooker near the center of the heat source, based on the case where the separation distance is the minimum allowable distance. The range hood according to claim 1. The temperature sensor has a cooker center line extending in the front-rear direction at the center of the cooker in the left-right direction with reference to when the separation distance is the median value between the minimum allowable distance and the maximum allowable distance. 3. The cooker hood according to claim 2, wherein the detection range center line extending in the front-rear direction at the center of the detection range of the temperature sensor in the left-right direction can be aligned. The temperature sensor is composed of a compound eye temperature sensor that detects the upper temperature of the cooker with a plurality of pixels,
The cooker hood according to any one of claims 1 to 3, wherein the temperature sensor is arranged such that the pixels on the front side of the cooker form a straight line parallel to the front side of the cooker. further comprising a sensor cover arranged on the side of the detection surface of the temperature sensor;
The sensor cover is arranged parallel to the horizontal plane,
4. The sensor cover according to any one of claims 1 to 3, wherein the thickness of the sensor cover is thicker at a portion closer to the cooker than at a portion farther from the detector and the cooker. 1. Range hood according to item 1. a control unit that compares the upper temperature detected by the temperature sensor with a preset threshold temperature to control the operating state of the cooker hood,
The temperature sensor is composed of a compound eye temperature sensor that detects the upper temperature of the cooker with a plurality of pixels,
6. The threshold temperature of any one of claims 1 to 5, wherein the threshold temperature is lower in pixels where the distance between the temperature sensor and the cooker is longer than in pixels where the distance between the detector and the cooker is shorter. The range hood according to any one of items 1 and 2. a control unit that compares the upper temperature detected by the temperature sensor with a preset threshold temperature to control the operating state of the cooker hood,
The range hood according to claim 2 or 3, wherein the threshold temperature is lower when the separation distance is large than when the separation distance is small.

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