JP2017044379A - Heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating apparatus capable of promptly detect a state in which a guard is covered with a combustible such as cloth or the like or there is a combustible in front of the guard, namely firing possibly occurs.SOLUTION: The heating apparatus is provided which is constituted in such a way that an infrared ray array sensor 10 configured to arrange a plurality of sensor elements for detecting temperature in two-dimensional manner is used, the sensor element is divided into a first group of sensor elements 13 and a second group of sensor elements 14, a temperature at main body 1 side including a heater 7 is detected by the first group of sensor elements 13 and a temperature of an object out of the main body 1 heated by the heater 7 is detected by the second group of sensor elements 14. With this configuration as above, if the guard 9 is covered by a combustible or if the combustible is placed near the guard, the second group of sensor elements 14 show a high temperature, so that when the second group of sensor elements 14 detect a temperature different from that, they judge that the combustible is present and it becomes possible to judge immediately whether or not abnormal state occurs.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heating apparatus that heats a room with heat generated by a heat source.

  2. Description of the Related Art Conventionally, there is widely used a heating apparatus that includes a heater as a heat source inside a main body and performs heating by releasing radiant heat generated from the heater from the front surface of the device. And in this kind of heating device, a metal guard for preventing a human hand or a foreign object from touching the heat source and being burned is attached to the front opening of the main body case that houses the heat source. .

  By the way, since the heating apparatus has a heat source as described above, it may cause a fire if used incorrectly or unexpectedly. For this reason, various safety devices are provided, and heating is quickly stopped when such a safety device detects a situation that may cause a fire.

  For example, if a flammable material such as cloth is placed on the guard, the flammable material may be overheated by the heat released from the heat source and ignite. I have to let it. Therefore, as means for detecting such a situation, a temperature fuse is provided inside the main body to detect an abnormal increase in internal temperature due to the guard being blocked (Patent Document 1), and a light emitting element and a light receiving element are provided. There is one that detects the presence of foreign matter such as cloth by blocking light from the light emitting element (Patent Document 2).

JP 2006-23033 A JP-A-6-341650

  However, in the configuration of Patent Document 1, it takes time until the temperature inside the main body reaches a temperature at which it can be determined that there is an abnormality, so a certain amount of time is required until an abnormality is detected. And if the guard is completely blocked by flammable material, you can detect the abnormality, but if it is partially covered, the internal temperature will not rise to a temperature that can be determined to be abnormal. May not be detected.

  Further, in the configuration of Patent Document 2, an object cannot be detected unless the position where the detection elements are blocked is covered. Therefore, in order to reliably detect an abnormality, it is necessary to devise a plurality of detection elements. In any method, if the combustible material is not in contact with the guard but is in close proximity, it is difficult to detect it as an abnormality in the first place.

  The present invention is for solving the above-mentioned problem, and not only a case where a guard is covered with a combustible material such as a cloth, but also a state where there is a possibility of ignition such as a combustible material in front of the guard. It is an object of the present invention to provide a heating device with excellent safety.

  The present invention includes a heat source for generating heat and an infrared array sensor configured by two-dimensionally arranging sensor elements for detecting temperature in the main body, and the infrared array sensor is heated by the heat source and the heat source. A first sensor element group for detecting a temperature on the main body side; and a second sensor element group for detecting a temperature of an object outside the main body heated by the heat source; and a temperature detected by the second sensor element group is The heating device is characterized in that the heat source is stopped when a predetermined temperature condition is exceeded.

  2. The heating apparatus according to claim 1, wherein the infrared array sensor is arranged with a detection surface facing substantially perpendicular to a direction in which heat is emitted from the heat source.

  The heating apparatus according to claim 2, further comprising an exterior case that houses the heat source, wherein the infrared array sensor is attached to the exterior case.

  4. The heating device according to claim 1, wherein the second sensor element group is divided into at least two parts in a direction in which heat is emitted from the heat source. 5.

  The heating device according to any one of claims 1 to 4, wherein when the temperature detected by the first sensor element group is less than a predetermined temperature, the heat source is stopped.

  By configuring as described above, the infrared array sensor detects the temperature rise inside the main body and the temperature rise of the object outside the main body at the same time, so that not only when the main body is covered with a cloth etc. In such a case, since the situation can be detected quickly and the heating can be stopped, the heating device is excellent in safety.

It is a front external view of the heating apparatus of the Example of this invention. It is a figure explaining the attachment position of an infrared array sensor. It is a figure explaining the structure of an infrared array sensor. It is a figure which shows the temperature data which the infrared array sensor detected at the time of normal use. It is a figure which shows the temperature data which the infrared array sensor detected at the time of use in the state where the cloth fell on the heating apparatus. It is a figure which shows the temperature data which the infrared array sensor detected at the time of use in the state which a combustible material adjoined. It is a figure which shows the temperature data which the infrared array sensor detected at the time of use in the state which removed the guard.

  Embodiments of the present invention that are considered to be suitable will be briefly described by showing the effects of the present invention.

  The present invention uses an infrared array sensor configured by two-dimensionally arranging a plurality of sensor elements for detecting temperature as means for detecting abnormality. And this sensor element is divided into at least two of the first sensor element group and the second sensor element group, the first sensor element group detects the temperature of the body side heated by the heat source and the heat source, and the second sensor element group The temperature of the object outside the main body heated by the heat source is detected.

  In other words, by using an infrared array sensor capable of detecting a two-dimensional temperature distribution, the sensor elements are divided into at least a first sensor element group and a second sensor element group, and the detection target is separated. It is possible to distinguish and detect the temperature rise and the temperature rise outside the main body. Thus, for example, during normal operation where there is no flammable material near the periphery of the heating device, the first sensor element group should show a high temperature to detect the temperature of the heat source, and the second sensor element group should show a low temperature. . However, when the guard is covered with a combustible material or a fire may occur due to the combustible material being placed nearby, the second sensor element group, which should normally be at a low temperature, will show a high temperature. . Therefore, when the second sensor element group detects a temperature different from that during normal operation, it is possible to immediately determine the abnormal state as a combustible substance. And when it judges that it is abnormal, it becomes a heating device excellent in safety by stopping a heat source immediately.

  In addition, the infrared array sensor can be arranged such that the distance and temperature from the heat source are obtained as a two-dimensional temperature distribution by one infrared array sensor by arranging the detection surface substantially perpendicular to the direction of heat emission from the heat source. it can.

  The infrared array sensor is attached to an exterior case that houses the heat source. Thereby, even if the heat source part of the heating device has a function to rotate, the positional relationship between the heat source and the sensor does not change, so that the temperature can be accurately detected and determined regardless of the presence or absence of rotation.

  Moreover, since the second sensor element group can detect the temperature of an object at a different distance from the main body by dividing at least two in the direction of heat release from the heat source, for example, the guard is covered with a combustible material. It is possible to detect separately the situation where the object that becomes high temperature is different, such as when the combustible is close to the guard.

  In addition, since the heat source is stopped when the temperature detected by the first sensor element group is less than the predetermined temperature, even when the temperature does not increase due to an abnormality on the main body or the heat source side, it can be determined as an abnormality.

  Hereinafter, a radiation heating apparatus using a heater as a heat source will be described as an example of the heating apparatus of the present invention with reference to the drawings.

  FIG. 1 is a front external view of a heating apparatus according to the present invention, and the heating apparatus includes a main body 1, a pedestal 2 provided below the main body 1, and a support column 3 that connects the main body 1 and the pedestal 2. Is done.

  The main body 1 includes an exterior case 5 having an opening 4 on the front surface. The exterior case 5 includes an operation unit 6 on the upper surface, and a heater 7 as a heat source in the exterior case 5 and the heat of the heater 7. And a reflection plate 8 that reflects the light forward. A metal guard 9 is attached to the opening 4 of the outer case 5, and heat generated from the heater 7 is released from the opening 4 to the front of the main body through the guard 9.

  In addition, the heating device has a swing function, and the swing function is turned ON by operating the button of the operation unit 6. Then, the main body 1 rotates in the horizontal direction with respect to the floor surface with the support column 3 as an axis, and the direction in which heat is released changes.

  An infrared array sensor 10 having a plurality of infrared elements for detecting temperature is provided below the guard 9 on the front surface of the outer case 5. As shown in the enlarged view of FIG. 2, the infrared array sensor 10 is attached to the sensor mounting plate 12 so that its detection surface 11 is substantially perpendicular (upward in the figure) to the direction of heat emitted from the heater (black arrow). It is mounted on the front surface of the outer case 5. Therefore, even if the main body 1 is rotated by the swing function, the positional relationship between the heater 7 and the infrared array sensor 10 does not change, so that the infrared array sensor 10 can reliably detect the temperature of the heater 7. Further, since the area below the guard 9 is not easily affected by the radiant heat of the heater 7, the temperature of the object itself heated by the heater 7 is also detected.

  The infrared array sensor 10 includes a plurality of sensor elements arranged in a matrix on a semiconductor substrate, and a lens for collecting infrared rays on the sensor elements, and is emitted from an object to be detected within a viewing angle α. By detecting infrared rays, it is possible to obtain a two-dimensional temperature distribution by measuring the temperature at a plurality of locations of the object to be detected. For example, a thermopile or a pyroelectric sensor is used as the sensor element.

  Further, in this embodiment, as shown in FIG. 3, the infrared array sensor 10 is constituted by 64 sensor elements of 8 rows and 8 columns. The first sensor element group 13 (element numbers 0 to 31) and the second sensor element group 14 (element numbers 32 to 63) of 4 rows and 8 columns far from the heater 7 are distinguished. The infrared array sensor 10 only needs to have two-dimensionally arranged sensor elements, and the number of sensor elements is not limited to the present embodiment, and the first sensor element group 13 and the second sensor element group. The number of 14 lines need not be the same.

  The first sensor element group 13 detects the temperature of the heater 7 and the temperature of the main body 1 heated by the heater 7, that is, the temperature of the reflecting plate 8 and the guard 9. The temperature outside is detected. Therefore, when the infrared array sensor 10 is attached to the main body 1, the projecting position of the detection surface 11 from the main body 1 is set according to the positional relationship with the guard 9 and is adjusted according to the size and shape of the sensor mounting plate 12. In addition, the 2nd sensor element group 14 should just detect the temperature to a dangerous line (for example, 15 cm ahead of the guard 9), if a combustible material approaches.

  When the heater 7 is in operation and the heater 7 is energized, the heat generated by the heater 7 heats the reflector 8 and the guard 9 inside the main body 1 to a high temperature, so the first sensor element group 13 generally has a high temperature. Will be detected. On the other hand, the temperature detected by the second sensor element group 14 differs depending on whether or not there is a foreign object in front of the heating device.

  That is, if the object to be heated is not close to the front of the main body 1, the heat released by the heater 7 diffuses and warms the indoor air, so the temperature detected by the second sensor element group 14 is It becomes low temperature. However, when the guard 9 is covered with a cloth or the like, or an object is heated in front of the guard 9 and there is an object to be heated by the heater 7, the temperature of the heating object is increased by the heat from the heater 7. Since it rises, the second sensor element group 14 detects a high temperature. Therefore, when the temperature detected by the second sensor element group 14 exceeds a predetermined temperature condition, it is determined that there is an abnormality, and energization to the heater 7 is stopped.

  In addition, according to the temperature distribution detected by the infrared array sensor 10, it is possible to distinguish and recognize a normal operation state where there is no flammable material around, a state where the guard 9 is covered with a flammable material, a state where the flammable material is close to the front, etc. Can do.

  Next, discrimination of temperature distribution and abnormal state obtained from the detection result of the infrared array sensor 10 will be described with reference to FIGS. Note that, in the drawing, different areas are shaded for each temperature zone, and the areas A to E are illustrated. However, the smaller the shaded interval, the higher the temperature.

<During normal operation>
FIG. 4 is a diagram representing the detection result of the infrared array sensor 10 as a two-dimensional temperature distribution in a normal operation state (non-abnormal operation state) where there is no combustible material around the heating device. Since the inside of the main body 1 and the guard 9 are heated by the heater 7 and become high temperature, the temperature detected by the first sensor element group 13 is represented by temperature regions A to C, and particularly the central portion near the heater 7 is the highest temperature. It is area A. On the other hand, all elements in the second sensor element group 14 detect the temperature region E. In this manner, the temperature range to be displayed is clearly distinguished between the first sensor element group 13 and the second sensor element group 14 during normal operation.

<Abnormal state 1>
When a combustible material such as a cloth falls from above the main body 1 and covers a part of the guard 9, the detection result of the infrared array sensor 10 is as shown in FIG. If the fallen combustible material covers the guard 9 over a wide range, the release of heat to the outside of the main body 1 is suppressed, so that heat is generated inside the main body 1 and the internal temperature rises. In the state where the part is covered, the temperature inside the main body 1 does not rise so much, so the first sensor element group 13 is clear enough to distinguish whether it is normal or abnormal, although the region where the temperature is higher is slightly increased compared to the normal operation. It ’s hard to find the difference. However, in the second sensor element group 14 that detects the low temperature uniformly during normal operation, the two rows near the heater 7 (element numbers 32 to 47) detect the temperature of the combustible material that covers the outside of the guard 9. The resulting element exhibits a high temperature region. Therefore, when the temperature region A is detected on the side close to the heater 7 of the second sensor element group 14, it is determined that there is an abnormality, and energization to the heater 7 is stopped.

  Thus, even if it is a part of the guard 9 that is covered with the combustible material, the combustible material is heated by the heat released by the heater 7 and becomes high temperature. Therefore, the temperature of the covered portion is detected. The two sensor element group 14 shows a high temperature region. And it is not related to the size or position of the area covered by the combustible material. Therefore, even when a part of the guard 9 that has been difficult to detect in the past is covered, the infrared array sensor 10 can be used to immediately determine that there is an abnormality and stop energizing the heater 7. .

<Abnormal state 2>
When a combustible material approaches the front of the main body 1 (front of the guard 9), the detection result of the infrared array sensor 10 is as shown in FIG. Since heat does not go inside the main body 1, the temperature inside the main body 1 detected by the first sensor element group 13 hardly changes compared to that during normal operation. Further, since the guard 9 is not covered with the combustible material, the temperature of the second row (element numbers 32 to 47) on the side close to the heater 7 in the second sensor element group 14 is slightly higher than that during normal operation. Although it is high, the temperature region still shows a low temperature state with D or E, and there is no clear difference that can distinguish between normal and abnormal. However, in the two rows (element numbers 48 to 63) on the side far from the heater 7 in the second sensor element group 14, the element that detects the temperature of the combustible in front of the main body 1 shows a high temperature region. Therefore, when the temperature region A is detected on the side farther from the heater 7 of the second sensor element group 14, it is determined that there is an abnormality, and energization to the heater 7 is stopped.

  That is, the infrared array sensor 10 can simultaneously detect not only the inside of the main body 1 but also the temperature of an object away from the main body 1. It is also possible to detect a state in which a combustible material is present at a position where there is a possibility of reaching. Further, in this embodiment, the second sensor element group 14 for detecting the temperature outside the main body 1 is composed of 4 rows, but if it is composed of at least 2 rows, the guard 9 is covered with combustible material. It becomes possible to distinguish and recognize the state and the state where the combustible material is close to the front.

<Abnormal state 3>
A guard 9 is attached to the heating device. If the guard 9 is used with the guard 9 removed, the user may get burned by touching the heater 7 or a combustible material may be in direct contact with the heater 7. In order to improve safety, it is desirable that the guard 9 can be detected as an abnormality even when the guard 9 is removed.

  When the guard 9 is removed, the detection result of the infrared array sensor 10 is as shown in FIG. In the first sensor element group 13 which should detect the high temperatures of A to C uniformly during normal operation, the part (element numbers 10 and 13) for detecting the temperature of the heater 7 detects a high temperature. A portion (element numbers 24 to 31) for detecting a low temperature and detecting the temperature of the guard 9 in particular shows a temperature region E, which means that there is no object heated by the heater 7. Therefore, when a predetermined time has elapsed from the start of energization of the heater 7, when the elements (element numbers 24 to 31) that detect the temperature of the guard 9 in the first sensor element group 13 are less than the temperature region A, it is determined as abnormal. The energization to the heater 7 is stopped.

  In the conventional structure, it is necessary to provide a dedicated sensor for detecting the removal of the guard 9, but using this infrared array sensor 10, it is abnormal even when the guard 9 is removed without providing a separate sensor. Can be detected. Further, if the element for detecting the temperature of the heater 7 remains low after the start of energization, it can be determined that the heater 7 is disconnected, and the failure of the device is also detected by the infrared array sensor 10. It is possible.

  Thus, by detecting the temperature using the infrared array sensor 10 configured by arranging the sensor elements two-dimensionally, it is possible to quickly detect a state with a possibility of ignition, and thus excellent safety. It becomes possible to constitute a heating device.

  In the present embodiment, the case where the infrared array sensor 10 is disposed below the guard 9 has been described as an example. However, the infrared array sensor 10 may be disposed above the guard 9. However, in that case, since the infrared array sensor 10 is easily affected by the radiant heat of the heater 7, it is necessary to make an abnormality determination in consideration of the tendency to detect higher eyes than the actual temperature of the object. In addition, when installed above the guard 9, the detection surface 11 of the infrared array sensor 10 is installed downward, so that dust or the like is present on the detection surface 11 compared to the case where the detection surface 11 is disposed below the guard 9. As a result, the detection sensitivity can be maintained.

  Moreover, although the heating apparatus of a present Example is a radiation system which is not provided with an air blower, it can be applied also to the warm air system heating apparatus provided with the air blower. Furthermore, if a power source for driving the infrared array sensor 10 can be obtained, the heat source is not limited to the heater, and the present invention can be applied to a heating apparatus that burns fuel such as kerosene or gas.

1 Body 5 Exterior case 7 Heater (heat source)
DESCRIPTION OF SYMBOLS 10 Infrared array sensor 11 Detection surface 13 1st sensor element group 14 2nd sensor element group

Claims (5)

  The main body includes an infrared array sensor configured by two-dimensionally arranging a heat source for generating heat and a sensor element for detecting temperature, and the infrared array sensor is heated by the heat source and the heat source. And a second sensor element group for detecting the temperature of an object outside the main body heated by the heat source, and the temperature detected by the second sensor element group is a predetermined temperature condition. The heating device is characterized in that the heat source is stopped when the temperature exceeds.   The heating apparatus according to claim 1, wherein the infrared array sensor is arranged with a detection surface facing substantially perpendicular to a direction in which heat is emitted from the heat source.   The heating apparatus according to claim 2, further comprising an exterior case that houses the heat source, wherein the infrared array sensor is attached to the exterior case.   The heating device according to any one of claims 1 to 3, wherein the second sensor element group is divided into at least two parts in a direction in which heat is emitted from the heat source.   The heating apparatus according to any one of claims 1 to 4, wherein when the temperature detected by the first sensor element group is less than a predetermined temperature, the heat source is stopped.

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