Heating device

Abstract

To provide a heating device having sufficient durability.SOLUTION: A heating device 1 includes a housing 2, a sensor part 16, and a heater part 6. The sensor part 16 detects a human entering a detectable area (a radiation range R). The heater part 6 has a carbonaceous heating element 132. The carbonaceous heating element 132 generates heat based on detection by the sensor part 16. The housing 2 has a housing body 20 and a casing 34. In the housing body 20, the carbonaceous heating element 132 is disposed. The casing 34 has a first casing plate part 81 and a second casing plate part 82. The first casing plate part 81 holds the sensor part 16 at the side far from the heater part 6 when viewed from the sensor part 16. The first casing plate part 81 holds the second casing plate part 82 at the side closer to the heater part 6 when viewed from the sensor part 16.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a heating device that can be used in factories and the like. [Background technology]

[0002] BACKGROUND ART A known example of a heat generating unit used as a heat source for a heating device such as an electric heater is disclosed in Japanese Patent No. 5383741 (Patent Document 1). This heating element unit is small, highly efficient, has high directivity, uniform heating and quick start-up, and has a heating element formed from a predetermined graphite film. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5383741 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above document does not disclose how to position a heating element unit having the above-mentioned characteristics relative to other parts of an electric heating device when the heating element unit is used to form an electric heating device.

[0005] Therefore, a first main object of the present invention is to provide a heating device having sufficient durability. A second main object of the present invention is to provide a heating device that has adequate directionality, quick action, energy saving properties, and sufficient durability. Furthermore, a third main object of the present invention is to provide a heating device that is sufficiently durable and easy to handle. [Means for solving the problem]

[0006] This specification discloses a heating device. The heating device may include a housing, a sensor unit, and a heater unit. The sensor unit may detect entry of a person into a detectable area. The heater unit may have a heating element. The heating element may generate heat based on detection by the sensor unit. The housing may include a housing main body and a casing. The heating element may be disposed within the housing main body. The casing may include a first casing plate portion and a second casing plate portion. The first casing plate portion may hold the sensor unit on a side farther from the heater unit than the sensor unit, and may hold the second casing plate portion on a side closer to the heater unit than the sensor unit. [Effects of the Invention]

[0007] A first main effect of the present invention is to provide a heating device having sufficient durability. A second main effect of the present invention is to provide a heating device that has adequate directionality, quick action, energy saving properties, and sufficient durability. Furthermore, a third main effect of the present invention is that a heating device is provided that is sufficiently durable and easy to handle. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of the rear, right and top sides of a heating device according to the present invention. [Figure 2] 1 is a perspective view of the front, left and bottom sides of a heating device according to the present invention. [Figure 3] FIG. 2 is a rear view of the heating device of FIG. [Figure 4] FIG. 2 is a bottom view of the heating device of FIG. [Figure 5] FIG. 5 is a cross-sectional view taken along line BB in FIG. 4. [Figure 6] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 7]2 is an exploded perspective view of the left, top, and front sides of the first heater holding section, the casing and control section, the power supply section, the connector and sensor section, and the partition section in the heating device of FIG. 1. FIG. [Figure 8] 2 is an exploded perspective view of the right, bottom, and rear sides of the first heater holding section, the casing and control section, the power supply section, the connector and sensor section, and the partition section in the heating device of FIG. 1. FIG. [Figure 9] 1 is a graph showing temperature changes at various measurement points. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described together with modified examples with reference to the accompanying drawings. The embodiment is not limited to the following embodiment and modified examples.

[0010] Fig. 1 is a perspective view of the rear, right and top sides of a heating device 1 according to the present invention. Fig. 2 is a perspective view of the front, left and bottom sides of the heating device 1. Fig. 3 is a rear view of the heating device 1. Fig. 4 is a bottom view of the heating device 1. Fig. 5 is a cross-sectional view taken along line BB in Fig. 4. Fig. 6 is a cross-sectional view taken along line AA in Fig. 3. Here, the heating device 1 is installed in a factory. The heating device 1 performs spot heating for workers in a predetermined location within the factory. However, the heating device 1 may also be installed outside a factory, and may be used to heat people other than workers.

[0011] The heating device 1 has a housing 2, an attachment portion 4, multiple (left and right pairs) ring portions 5, a heater portion 6, a cover 8, a control portion 10, a power supply portion 12, a connector 14, and a sensor portion 16.

[0012] The housing 2 is made of metal and includes a housing main body 20, a reflecting portion 22, a first heater holding portion 24, a second heater holding portion 26, a third heater holding portion 30, a fourth heater holding portion 32, a casing 34, and a partition portion 36.

[0013] The housing body 20 is a box-shaped body that is open downward and extends left and right. The longitudinal direction of the housing body 20 is the left-right direction of the heating device 1. The side where the mounting portion 4 is located is the upper side of the heating device 1, and the opening side of the housing body 20 is the lower side of the heating device 1. Furthermore, the direction intersecting the up-down and left-right directions is the front-rear direction of the heating device 1. These directions of the heating device 1 are determined for the convenience of explanation and may change depending on the movement of various members and parts, the installation mode, etc.

[0014] The housing body 20 has a first plate portion 40, a second plate portion 42, and a third plate portion 44.

[0015] The first plate portion 40 is a folded plate that has a semi-octagonal shape when viewed from right to left, and forms the upper portion of the housing main body 20. The second plate portion 42 is shaped like a folded plate box that is open on the top, left, and right sides, and constitutes the lower part of the housing main body 20. The second plate portion 42 is combined with the first plate portion 40 below the first plate portion 40. An opening 45 is formed in the center of the lower surface of the second plate portion 42. A through-hole portion 46 is formed in the right end part of the lower surface of the second plate portion 42. The third plate portion 44 is a folded plate and has a third plate portion main body 47 and a piece portion 48. The upper portion of the third plate portion main body 47 is semi-octagonal, and the lower portion is rectangular. The piece portion 48 of the third plate portion 44 is provided so as to extend up, down, left, and right in front and behind the third plate portion main body 47. The third plate portion 44 is located in an area surrounded by the left end portion of the first plate portion 40 and the left end portion of the second plate portion 42.

[0016] The left front lower part of the first plate portion 40, the left front upper part of the second plate portion 42, and the left upper part of the front piece 48 of the third plate portion 44 are fastened with screws 50 in the front-to-rear direction. The left rear lower part of the first plate portion 40, the left rear upper part of the second plate portion 42, and the left upper part of the rear piece 48 of the third plate portion 44 are fastened with screws 50 in the front-to-rear direction. The front center lower left of the first plate portion 40 and the front center upper left of the second plate portion 42 are fastened with fore-aft screws 50. The front center lower right of the first plate portion 40 and the front center upper right of the second plate portion 42 are fastened with fore-aft screws 50. The rear center lower left of the first plate portion 40 and the rear center upper left of the second plate portion 42 are fastened with fore-aft screws 50. The rear center lower right of the first plate portion 40 and the rear center upper right of the second plate portion 42 are fastened with fore-aft screws 50. A plurality of holes 52 are formed in the first plate portion 40, the second plate portion 42, and the third plate portion 44. Each hole 52 extends left and right or front and rear. Furthermore, the shape etc. of the housing main body 20 is not limited to the above, and for example, the front-to-back size and the left-to-right size may be the same, the holes 52 may be formed only on the top surface, the holes 52 may extend vertically, or the holes 52 may be circular or polygonal, and at least any two of the first plate portion 40, the second plate portion 42, and the third plate portion 44 may be integral, or at least any of these may be further divided.

[0017] The reflector 22 is held by the housing body 20, and has a reflector main body 54 and a plurality of (a pair of left and right) heater holding pieces 56. The reflector 22 reflects a portion of the infrared rays emitted from the heater 6 downward. The reflector main body 54 is a metal box-like structure that is open downward, leftward, and rightward. As shown in Fig. 6, the cross section of the reflector main body 54 is bell-shaped. The opening at the bottom of the reflector main body 54 is located above the opening 45 in the second plate 42 of the housing body 20. The left heater holding piece 56 protrudes downward from the upper left end of the reflecting section main body 54 and extends vertically and front-to-back. The outer shape of the lower end of the left heater holding piece 56 corresponds to the outer shape of the heater section 6 and holds the heater section 6. The right heater holding piece 56 protrudes downward from the upper right end of the reflecting section main body 54 and extends vertically and front to back. The outer shape of the lower end of the right heater holding piece 56 corresponds to the outer shape of the heater section 6 and holds the heater section 6. The cross section of the reflector main body 54 may be formed in the shape shown by the two-dot chain line in Fig. 6 so that the infrared rays from the heater 6 can be distributed over a wider range in both the front and rear. In this case, the position of the heater 6 is adjusted to, for example, the position shown by the two-dot chain line in Fig. 6.

[0018] 7 is an exploded perspective view of the left, top, and front sides of the first heater holding part 24, the casing 34, the control part 10, the power supply part 12, the connector 14, the sensor part 16, and the partition part 36. FIG. 8 is an exploded perspective view of the right, bottom, and rear sides of the first heater holding part 24, the casing 34, the control part 10, the power supply part 12, the connector 14, the sensor part 16, and the partition part 36. The first heater holding portion 24 is a folded plate and has a first heater holding portion main body 60, a heater end holding piece 62, and a plurality of pieces 64. The first heater holding part main body 60 extends vertically and front to back. The upper part of the first heater holding part main body 60 is semi-octagonal, and the lower part is a pair of rectangular shapes separated into front and back. The heater end holding piece 62 protrudes rightward from the center of the first heater holding body 60. The heater end holding piece 62 holds the right end of the heater 6. Each piece 64 protrudes rightward from the upper or lower side of the first heater holding portion main body 60 and extends forward and backward. The first heater holding portion 24 is disposed to the right of the right heater holding piece 56 of the reflecting portion 22. An upper piece 64 of the first heater holding portion 24 and the upper surface of the first plate portion 40 of the housing main body 20 are fastened with vertical screws 66.

[0019] The second heater holding portion 26 is a folded plate and has a second heater holding portion main body 70 , a slit portion 72 , and a piece portion 74 . The second heater holding part main body 70 is bell-shaped when viewed from right to left, and has the same cross-sectional shape as the reflecting part main body 54. The slit portion 72 extends downward from the upper edge of the second heater holding portion main body 70. The width of the slit portion 72 is slightly larger than the diameter of the heater portion 6. The shape of the lower end of the slit portion 72 is semicircular, which is the same as the shape of the heater portion 6. The heater portion 6 is inserted into the slit portion 72. The lower end of the slit portion 72 holds the heater portion 6. Each piece 74 protrudes rightward from the lower side of the second heater holding portion main body 70 and extends in the front-to-rear direction. The second heater holding part 26 is disposed on the left side of the right heater holding piece 56 of the reflecting part 22. The piece 74 of the second heater holding part 26 is sandwiched between the inner surface of the lower surface of the second plate part 42 and the lower piece 64 of the first heater holding part 24.

[0020] The third heater holding portion 30 is similar to the first heater holding portion 24 and is bilaterally symmetrical, and is fastened to the housing body 20 by screws 76 in the vertical direction. The fourth heater holding part 32 is configured similarly and bilaterally symmetrically to the second heater holding part 26. The lower end of the fourth heater holding part 32 is sandwiched between the housing main body 20 and the third heater holding part 30. The outer periphery of the fourth heater holding part 32 is in contact with the inner surface of the reflecting part main body 54. The number of holding portions of the heater portion 6 may be three or less, or may be five or more.

[0021] The casing 34 has a side surface portion 80, a first casing plate portion 81, and a second casing plate portion 82. The side surface portion 80 is a folded plate and has a side surface portion main body 84 that extends vertically and front-to-back, a plurality of pieces 86 that extend leftward from the edge of the side surface portion main body 84, and a plurality of holes 88 similar to the holes 52. The side surface portion 80 may be treated as a component of the housing main body 20. The first casing plate 81 is a folded plate and has a first casing plate main body 90 that extends in the front-to-rear and left-to-right directions, and a piece 92 that extends downward from the right edge of the first casing plate main body 90. The piece 92 is attached to the left surface of the lower part of the side surface main body 84. The first casing plate 81 is fixed to the left side of the side surface 80 via the piece 92 with multiple (two) screws 94 in the left-to-right direction. The second casing plate 82 is a folded plate and is disposed above the first casing plate 81. The second casing plate 82 includes a base 100, multiple (front and rear pairs) legs 102, and a wall 104. Each leg 102 is "L" shaped when viewed from right to left and protrudes downward and forward or backward from the front or rear edge of the base 100. The wall 104 protrudes upward from the right rear of the base 100 and extends vertically and horizontally. When viewed from top to bottom, the base 100 has a rectangular shape with the right front portion removed by a size similar to that of the wall 104. The second casing plate 82 is secured to the top of the first casing plate 81 with multiple screws 106 that pass through the undersides of the legs 102 and the front and rear edges of the first casing plate body 90. A gap G is formed between the first casing plate body 90 and the base portion 100 of the second casing plate portion 82. The casing 34 is held by the housing main body 20. The first casing plate portion 81 and the second casing plate portion 82 are disposed inside the right end portion of the housing main body 20.

[0022] The partition 36 is a folded plate and has a partition body 110 that extends in the front-to-rear and up-to-down directions, and a piece 112 that extends leftward from the upper edge of the partition body 110. The upper part of the partition body 110 is semi-octagonal, and the lower part is rectangular. A hole 113 having the same size as or slightly larger than the heater unit 6 is opened in the center of the partition body 110. A power line connected to the heater unit 6 passes through the hole 113. The piece 112 protrudes leftward from the upper edge of the divider body 110 and extends forward and backward. The partition 36 is disposed to the right of the first heater holding portion 24 and to the left of the casing 34. A piece 112 of the partition 36 is fixed to the upper surface of the first plate portion 40 of the housing main body 20 with a screw 114.

[0023] The mounting part 4 is made of metal and has a mounting part main body 120 and a plurality of washers 122 (a pair of washers on the left and right). The mounting body 120 is shaped like the letter "Π" when viewed from the front to the rear. Each washer 122 is L-shaped when viewed from the front to the rear. The upper end of each washer 122 has a plurality of through holes 124 arranged in an arc. The mounting body 120 is held by left and right washers 122 in a state in which it can rotate around left and right screws 126 that function as axes extending left and right. The mounting body 120 is fixed by passing thumb screws 128, which function as attitude fixing members, through holes 124 in each washer 122 together with the left or right face of the mounting body 120. The rotational position of the mounting body 120 around its axis is adjusted by changing the position of the through holes 124 through which each thumb screw 128 passes. The mounting part 4 is attached to a frame attached to the ceiling of the factory. The heating device 1 is installed in the factory via the mounting part 4. The mounting position of the heating device 1 can be adjusted by the position of the through holes 124 through which each thumbscrew 128 passes. The heating device 1 may be attached directly to the ceiling. Furthermore, the heating device 1 may be placed on the floor in an attitude extending vertically. In this case, the mounting part 4 may be removed. The casing 34 side may be the lower side or the upper side. Furthermore, a support member may be provided to support the lower part of the heating device 1 in this case.

[0024] Each ring portion 5 includes an annular ring portion body and a threaded portion. The threaded portion protrudes downward from the lower end of the ring body. The upper left portion of the first plate portion 40 and the upper piece 48 of the third plate portion 44 are fastened by vertically threaded portions of the ring portion 5 . The upper right portion of the first plate portion 40 and the upper piece portion 86 of the side surface portion 80 of the casing 34 are fastened by vertically threaded portions of the ring portion 5. In the heating device 1, a first end of a connecting member such as a chain is passed through at least one of the ring portions 5, and the second end of the connecting member is connected to a factory frame or the like, thereby reinforcing the mounting of the heating device 1 and / or preventing the heating device 1 from falling when the mounting portion 4 is detached.

[0025] The heater section 6 has one heater 129. The heater 129 extends to the left and right. The heater 129 is a lamp heater, an infrared heater, and has a tube 130, a carbonaceous heating element 132, and a terminal portion 134. Note that a plurality of heaters 129 may be provided in the heater section 6. In this case, the heaters 129 may be similar to one another and may be arranged in front of or behind one another. Alternatively, some of the heaters 129 may be different from the other heaters 129. Alternatively, three or more types of heaters 129 may be used. In some or all of the heaters 129, a plurality of carbonaceous heating elements 132 may be placed in a single tube 130. Heaters other than lamp heaters may also be used.

[0026] The tubes 130 are made of quartz glass and are translucent. The tubes 130 extend left and right and are cylindrical with their front and rear ends sealed. Note that the material of at least one of the tubes 130 may be other than quartz glass as long as it is transparent to infrared rays and heat-resistant. Furthermore, the shape of at least one of the tubes 130 may be other than cylindrical, such as a rectangular tube. An inert gas such as argon gas is sealed inside the tube 130 to prevent deterioration due to oxidation of the carbonaceous heating element 132. Note that sealing of the inert gas may be omitted.

[0027] The carbonaceous heating element 132 is a plate-like member that extends in the left-right direction and spreads in all directions. The carbonaceous heating element 132 is a carbonaceous plate. The carbonaceous heating element 132 is positioned horizontally. However, the carbonaceous heating element 132 may be positioned in a position other than horizontal. Furthermore, the carbonaceous heating element 132 may have a shape other than a plate shape. Furthermore, a heating element other than the carbonaceous heating element 132 may be used. The carbonaceous heating element 132 has slits of equal length cut at equal intervals on both the front and rear sides throughout the entire body except for the ends (not shown). The rear slit is located behind the front slit, and the front and rear slits are arranged at the same position in the left-right direction. The central portion of the carbonaceous heating element 132 between the front and rear slits in the front-to-rear direction is perpendicular to the left-to-right direction. Therefore, this central portion becomes even brighter when power is applied, further improving the heat generation amount of the heater 129. The front and rear slits of the carbonaceous heating element 132 may be cut alternately. In this case, each carbonaceous heating element 132 has a serpentine shape. Furthermore, the length of some slits may be longer or shorter than the length of the other slits. Furthermore, the size between some slits may be larger or smaller than the size between other slits. Furthermore, slits may be omitted from the carbonaceous heating element 132. When energized, the carbonaceous heating elements 132 generate heat by radiating infrared rays. Depending on the presence or absence and arrangement of slits in each carbonaceous heating element 132, the resistance of each carbonaceous heating element 132 is adjusted, the amount of infrared radiation is adjusted, and the amount of heat generated is adjusted. For example, if the distance between the slits above and below the center of each carbonaceous heating element 132 is made larger than the distance between the slits at the center, the resistance at the center of each carbonaceous heating element 132 will be larger than the distance above and below it, and the amount of infrared radiation at the center of each carbonaceous heating element 132 will be larger than the distance above and below it, and the amount of heat generated at the center of each carbonaceous heating element 132 will be larger than the distance above and below it. The carbonaceous heating element 132 is lighter than a metal heating element of the same size, and therefore the heater 129 is lighter than a heater using a metal heating element of similar size. Also, the carbonaceous heating element 132 emits infrared rays and heats the space below with the infrared rays, so the heater 129 can efficiently heat even distant heating targets. Furthermore, the carbonaceous heating element 132 instantly emits light (glows red) when power is applied, so heating begins immediately and the worker who is the heating target can easily understand the operating status of the heater 129.

[0028] A carbonaceous heating element 132 is held within the tube 130 . The amount of infrared radiation from the top and bottom surfaces of the carbonaceous heating element 132 is greater than the amount of infrared radiation from the thick surfaces of the carbonaceous heating element 132, that is, the front, back, left, and right surfaces. That is, infrared radiation from the carbonaceous heating element 132 is mainly from the top and bottom surfaces, and the heat radiation from the carbonaceous heating element 132 has directionality. One or more internal reflectors that reflect infrared rays may be provided inside the tube 130. The internal reflectors may be plate-shaped, and may be entirely in contact with the inner wall of the tube 130, or partly or entirely separated from the inner wall of the tube 130.

[0029] The terminal portion 134 is provided at the right end of the tube 130 . The terminal portion 134 is electrically connected to the carbonaceous heating element 132 .

[0030] The heater 129 is held by the housing main body 20 via a first heater holding portion 24 , a second heater holding portion 26 , a third heater holding portion 30 , and a fourth heater holding portion 32 . The heater 129 is held in a state in which the heat it radiates can escape to the outside relative to the housing main body 20. The heat emitted by the heater 129 escapes downward even if the cover 8 is present. The partition portion 36 is disposed between the sensor portion 16 and the carbonaceous heating element 132 . A part or the whole of the carbonaceous heating element 132 is disposed inside the reflecting portion 22 .

[0031] The cover 8 is made of metal and has a lattice shape. The cover 8 is provided on the lower opening so as to cover the lower opening of the reflecting section 22. The cover 8 allows infrared rays from the heater section 6 to pass through while preventing the entry of objects larger than the gaps in the lattice, such as the hands of workers, and prevents unintended sudden heating of objects due to contact with the heater section 6.

[0032] The control unit 10 controls the heater unit 6. The control unit 10 is a relay. However, the control unit 10 may be something other than a relay. The control unit 10 controls the amount of electricity supplied to the carbonaceous heating element 132 of the heater 129, thereby controlling the amount of heat generated by the carbonaceous heating element 132. The control unit 10 is electrically connected to a terminal portion 134 of the heater 129. The control unit 10 is fixed to the upper right side of the base portion 100 in the second casing plate portion 82 of the casing 34.

[0033] The power supply unit 12 supplies power from a power source to the heater 129 of the heater unit 6 under the control of the control unit 10. The power supply unit 12 is a power supply element. Note that the control unit 10 may be something other than a power supply element. The power supply unit 12 is fixed to the casing 34. The rear surface of the power supply unit 12 is fixed to the front side of the wall portion 104 of the second casing plate portion 82 of the casing 34. The lower surface of the power supply unit 12 is exposed to the first casing plate portion 81.

[0034] The connector 14 is electrically connected to the power supply unit 12 via lead wires (not shown). A power line from a power source (not shown) can be connected to the connector 14 .

[0035] The sensor unit 16 includes one sensor 140 . Sensor 140 is an infrared sensor and a human presence sensor, and includes a sensor main body 142 and an infrared transmitting / receiving unit 144. Sensor 140 is fixed to the underside of the lower surface of first casing plate main body 90 of first casing plate 81. First casing plate 81 holds sensor unit 16 on its lower surface, which is the side farther from heater unit 6 as viewed from sensor unit 16. First casing plate 81 holds second casing plate 82 on its upper surface, which is the side closer to heater unit 6 as viewed from sensor unit 16. The sensor 140 may be a sensor other than an infrared sensor. Furthermore, a plurality of sensors 140 may be provided in the sensor unit 16. In this case, the sensors 140 may be similar to each other and may be arranged in front of and behind each other. Alternatively, some of the sensors 140 may be different from the other sensors 140. Alternatively, three or more types of sensors 140 may be used.

[0036] The infrared transmitting and receiving unit 144 is exposed downward at the center of the lower part of the sensor main body 142. The infrared transmitting and receiving unit 144 is disposed above the through-hole portion 46 of the housing main body 20. The infrared transmitting / receiving unit 144 is electrically connected to the control unit 10. The infrared transmitting / receiving unit 144 transmits sensor infrared rays, which are different from the infrared rays of the heater 129, within the irradiation range R and can receive the reflected sensor infrared rays. The infrared transmitting / receiving unit 144 includes a Fresnel lens and an infrared LED. Some or all of the sensor infrared rays are reflected back to the infrared transmitting / receiving unit 144 by a worker located in a position corresponding to the irradiation range R. The irradiation range R corresponds to the detectable area of ​​the sensor 140 and corresponds to the area to be heated. When the infrared transmitting / receiving unit 144 receives a predetermined amount of sensor infrared rays or more, it determines that there is a person below the sensor 140 and generates a human detection signal indicating that a person has been detected. The sensor unit 16 detects a person entering the detectable area and a person entering the area to be heated. Note that the detectable area and the area to be heated do not have to coincide. The control unit 10 allows the power supply unit 12 to supply power to the heater unit 6 based on the reception of a human presence signal from the sensor unit 16. Furthermore, if the control unit 10 does not receive a human presence signal from the sensor unit 16, it cuts off the supply of power from the power supply unit 12 to the heater unit 6. Based on the detection by the sensor unit 16, the heater unit 6 receives power and generates heat. The sensor unit 16 may generate a dead signal when it does not detect a person, and in this case, the control unit 10 may cut off the supply of power to the heater 129 based on the reception of the dead signal. The heating device 1 may also be provided with a switch for turning the power on and off.

[0037] An example of how such a heating device 1 is used will be described below. The heating device 1 is installed on a ceiling frame, floor, or wall in a factory. The power line of the heating device 1 is connected to a power source and a connector 14. The heating device 1 may also be installed freestanding, such as simply placed on the floor or simply hung on a frame or wall. The weight of the heating device 1 is such that it can be carried by one person. Furthermore, the power cord is detachable from the connector 14 and is separate from the housing 2, etc. Therefore, the heating device 1 is easy to install and the power cord is easy to connect. The weight of the heating device 1 does not have to be such that it can be carried by one person. Furthermore, the power cord does not have to be separate from the heating device 1 other than the power cord. Power from the power source is supplied to the power supply unit 12 via the connector 14. When the control unit 10 does not receive a motion signal from the sensor unit 16 indicating that a worker is the target of heating, the control unit 10 cuts off the supply of power from the power supply unit 12 to the heater unit 6.

[0038] When a worker approaches the area below the heating device 1, which is the area to be heated, the sensor unit 16 detects the worker. Then, the control unit 10 allows the power supply unit 12 to supply power to the heater unit 6, and the power supply unit 12 supplies power to the heater 129. The heater 129 generates heat instantly due to the carbonaceous heating element 132. Therefore, the worker is heated as soon as he arrives below the heating device 1. For example, the heater 129 reaches an output equivalent to 95% (percent) of the rated power within two seconds after the start of power supply. The rated power is, for example, 1500 W (watts). Note that the percentage (%) of the output that the heater 129 reaches within two seconds after the start of power supply with respect to the rated power may be any of 90, 92, 97, 98, or 99 instead of 95. The rated power (W) may also be any of 800, 1000, 1200, 1800, 2000, 2200, or 2500.

[0039] The carbonaceous heating element 132 of the heater 129 is a horizontal plate-like element, and has directivity in the up-down direction, which is the direction in which the surface faces. Infrared rays directed downward from the carbonaceous heating element 132 reach the worker directly. On the other hand, infrared rays directed upward from the carbonaceous heating element 132 are reflected by the reflecting portion 22 and reach the worker below. The directivity of the carbonaceous heating element 132 makes it easier to design the reflecting portion 22 compared to a case in which the carbonaceous heating element 132 does not have directionality. Furthermore, the directivity of the carbonaceous heating element 132 allows more of the infrared rays for heating to reach the worker.

[0040] Furthermore, when the worker leaves the area below the heating device 1, the sensor unit 16 no longer detects the worker and no longer transmits a human detection signal. Then, the control unit 10 switches to cut off the supply of power from the power supply unit 12 to the heater unit 6. With the power cut off, the heater 129 turns off and stops heating by emitting infrared rays. In this way, the heater section 6 of the heating device 1 operates only when the worker is below, which saves energy compared to when it operates all the time.

[0041] Such a heating device 1 provides the following effects. That is, the heating device 1 includes a housing 2, a sensor unit 16, and a heater unit 6. The sensor unit 16 detects the entry of a person (worker) into a detectable area (irradiation range R). The heater unit 6 includes a carbonaceous heating element 132. The carbonaceous heating element 132 generates heat based on detection by the sensor unit 16. The housing 2 includes a housing main body 20 and a casing 34. The carbonaceous heating element 132 is disposed within the housing main body 20. The casing 34 includes a first casing plate portion 81 and a second casing plate portion 82. The first casing plate portion 81 holds the sensor unit 16 on a side farther from the heater unit 6 than the sensor unit 16. The first casing plate portion 81 holds the second casing plate portion 82 on a side closer to the heater unit 6 than the sensor unit 16. Therefore, the first casing plate portion 81 and the second casing plate portion 82 suppress the transfer of heat from the heater portion 6 to the sensor portion 16. This suppresses the reduction in the lifespan of the sensor portion 16 due to heat, and the heating device 1 has sufficient durability.

[0042] Furthermore, a gap G is formed between the first casing plate portion 81 and the second casing plate portion 82. Therefore, the transfer of heat from the heater portion 6 to the sensor portion 16 is also suppressed by the gap G, and the heating device 1 is provided with even more sufficient durability. Furthermore, the heating device 1 is equipped with a control unit 10 that controls the supply of power to the heater unit 6. The control unit 10 is held by the second casing plate portion 82. Furthermore, the heating device 1 is equipped with a power supply unit 12 that supplies power to the heater unit 6. The power supply unit 12 is held by the second casing plate portion 82. Therefore, the second casing plate portion 82 also serves to mount the control unit 10 and the power supply unit 12. Therefore, the heating device 1 becomes more compact while maintaining its functionality.

[0043] Furthermore, the heating device 1 has a partition 36. The partition 36 is disposed between the sensor unit 16 and the carbonaceous heating element 132. Therefore, the partition 36 further suppresses the transfer of heat to the sensor unit 16. Therefore, the durability of the heating device 1 is further improved. Furthermore, the heating device 1 has a first heater holding portion 24 that holds the heater portion 6. The partition portion 36 is disposed between the first heater holding portion 24 and the sensor portion 16. Therefore, the arrangement of the partition portion 36 is rational for suppressing heat transfer to the sensor portion 16. This further improves the durability of the heating device 1. Furthermore, the heating device 1 is equipped with a reflecting portion 22. The reflecting portion 22 is held by the housing main body 20. The carbonaceous heating element 132 is disposed inside the reflecting portion 22. Therefore, heat from the carbonaceous heating element 132 that is not directed directly toward the worker is directed toward the worker by the reflecting portion 22. This further improves the heating efficiency of the heating device 1. In addition, the reflecting portion 22 suppresses the transfer of heat from the heater portion 6 to the sensor portion 16. This further improves the durability of the heating device 1.

[0044] Furthermore, the heater unit 6 is an infrared heater. Therefore, when the heater unit 6, which is normally off, is turned on when a worker enters the irradiation range R, the heater unit 6 has a better start-up time than other heaters and generates heat immediately. Therefore, the worker can receive heat as soon as he enters the area to be heated, and the immediacy of the heating device 1 is improved. Furthermore, the heating element of the infrared heater is a carbonaceous heating element 132. This further improves the instantaneous heating of the heating device 1. Furthermore, the carbonaceous heating element 132 has excellent efficiency in converting electricity into heat. This further improves the energy saving properties of the heating device 1. The carbonaceous heating element 132 is plate-shaped and is held with one surface facing the irradiation range R. This increases the amount of heat that reaches the workers directly, further improving the energy saving properties of the heating device 1.

[0045] In addition, the first casing plate portion 81 and the second casing plate portion 82 are disposed inside the housing main body 20. Therefore, the housing main body 20 for holding the heater portion 6 can hold the first casing plate portion 81 and the second casing plate portion 82 for protecting the sensor portion 16. The housing 2 also has a connector 14 to which a power line can be connected. This allows the power line to be disconnected at least either during installation or storage, making the heating device 1 even easier to handle.

[0046] The embodiment of the present invention or its modifications further includes the following modifications as appropriate. In the heating device 1, at least one of the number, material, and arrangement of various components or parts in the heating device 1 may be changed, such as providing two or more partitions 36. Changing the number of various components or parts may include reducing the number to zero, i.e., omitting various components or parts. [Example]

[0047] For one example of a heating device 1 in which the housing 2 is approximately 1 meter in size in the left-right direction, the changes in various temperatures over time were measured for approximately 30 minutes after the heater unit 6 was turned on, with the housing 2 not tilted relative to the mounting unit 4 and installed on the ceiling so that infrared rays were mainly irradiated directly downward. The temperature was measured at the center in the left-right direction inside the reflecting portion 22, and at the upper center (measurement point M1 in FIG. 8) and lower center (measurement point M2 in FIG. 8) on the right side of the first heater holding portion 24. 9 is a graph showing temperature changes at various measurement locations. The temperature inside the reflecting section 22 rises to approximately 180°C due to heat generated by the heater section 6. In contrast, the temperature of measurement location M1 on the upper right side of the partition section 36, opposite the carbonaceous heating element 132, is kept at approximately 100°C. Furthermore, the temperature of measurement location M2 on the lower right side of the partition section 36 is kept at approximately 40°C. By suppressing the temperature rise in this way, the sensor unit 16, the control unit 10, the power supply unit 12, and the connector 14 are protected. [Explanation of symbols]

[0048] 1·· Heating device, 2·· Housing, 6·· Heater section, 10·· Control section, 12·· Power supply section, 14·· Connector, 16·· Sensor section, 20·· Housing main body, 22·· Reflecting section, 24·· First heater holding section (heater holding section), 34·· Casing, 36·· Partition section, 81·· First casing plate section, 82·· Second casing plate section, 132·· Carbonaceous heating element, G·· Gap, R·· Irradiation range (detectable area).

Claims

1. The device includes a housing, a sensor unit, and a heater unit, The sensor unit detects entry of a person into a detection area, the heater section has a heating element, the heating element generates heat based on detection by the sensor unit, The housing includes a housing body and a casing, The heating element is disposed within the housing body, The casing has a first casing plate portion and a second casing plate portion, The first casing plate portion holds the sensor portion on a side farther from the heater portion as viewed from the sensor portion, and holds the second casing plate portion on a side closer to the heater portion as viewed from the sensor portion. A heating device characterized by:

2. A gap is formed between the first casing plate portion and the second casing plate portion.

2. The heating device according to claim 1.

3. Further, a control unit is provided to control the supply of power to the heater unit, The control unit is held by the second casing plate portion.

2. The heating device according to claim 1.

4. Further, a power supply unit that supplies power to the heater unit is provided, The power supply unit is held by the second casing plate portion.

2. The heating device according to claim 1.

5. Furthermore, it has a partition part, The partition is disposed between the sensor and the heating element.

2. The heating device according to claim 1.

6. Further, a heater holding portion that holds the heater portion is provided, The partition is disposed between the heater holding portion and the sensor portion.

6. The heating device according to claim 5.

7. Furthermore, it has a reflector, the reflecting portion is held by the housing body, The heating element is disposed inside the reflecting portion.

2. The heating device according to claim 1.

8. The heater section includes an infrared heater.

2. The heating device according to claim 1.

9. The heating element is a carbonaceous heating element.

2. The heating device according to claim 1.

10. The heating element is plate-shaped and is held with one surface facing the detectable area.

2. The heating device according to claim 1.

11. The first casing plate portion and the second casing plate portion are disposed inside the housing body.

2. The heating device according to claim 1.

12. The housing has a connector to which a power line can be connected.

2. The heating device according to claim 1.

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