JP7208836B2 - heater - Google Patents

Description

The present invention relates to heaters.

2. Description of the Related Art Conventionally, there has been known a heater that has a heat generating portion such as a sheathed heater and radiates the heat of the heat generating portion directly or indirectly from the outer surface of fins. Such a heater warms the air in the air-conditioned room by heat radiation and convection from the fins.

JP 2009-186129 A

Since the fins reach a high temperature due to the heat generated by the heat-generating portion, the member supporting the fins and the housing housing the fins are affected by the heat. Moreover, since the housing forms an outer shell that is directly touched by the user, it is important to set the surface temperature of the housing within a safe range. On the other hand, the heater needs to efficiently heat the room to a desired temperature, and a required output is required for that purpose. Therefore, the heater is required to have both safety and heating efficiency.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a safe heater without reducing heating efficiency.

In order to solve the above-described problems, a heater according to the present invention includes a heat generating portion, a heat radiating portion that accommodates the heat generating portion inside and radiates the heat of the heat generating portion from an outer surface, and the heat radiating portion. a housing having a pair of inner walls facing each other in a first direction; and a pair of heat shields between the pair of inner walls and the heat radiating portion for shielding the heat of the heat generating portion from the pair of inner walls. a plate and a fixture supporting the heat radiating section over the first direction and having both ends fixed to the pair of heat shield plates, the heat radiating section having one end in the first direction; and the other end, and the one end and the other end are arranged between the pair of heat shield plates .

In the heater according to the present invention, safety can be provided without reducing the heating efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view seen from the front side of the heater which shows one Embodiment of the heater which concerns on this invention. The side view seen from the left side with the right and left panels of the heater removed. The side view which looked at the heater of FIG. 2 from the right side. The perspective view seen from the rear surface side explaining the process of removing the left and right panels of the heater and attaching the heat dissipation unit. FIG. 3 is a cross-sectional view taken along line VV of FIG. 2; FIG. 3 is an end view along line VI-VI of FIG. 2; The enlarged perspective view of the fixing|fixed part periphery for right fixtures. The enlarged perspective view of the fixing|fixed part periphery for left fixtures.

An embodiment of a heater according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a front perspective view of a heater 1 showing an embodiment of the heater according to the present invention.
FIG. 2 is a side view of the heater 1 with the left and right panels 35 removed and viewed from the left side.
FIG. 3 is a side view of the heater 1 of FIG. 2 as seen from the right side.
FIG. 4 is a rear perspective view illustrating the process of removing the left and right panels 35 of the heater 1 and attaching the heat radiating unit 80 .
5 is a cross-sectional view taken along line VV of FIG. 2. FIG.
6 is an end view along line VI-VI of FIG. 2. FIG.

In the following description, "front (front)", "rear (rear)", "top", "bottom", "right" and "left" follow the definitions in FIGS. The vertical direction corresponds to the vertical direction when the heater 1 is installed. The front-rear direction and the left-right direction correspond to the horizontal direction when the heater 1 is installed.

The heater 1 mainly includes a heat radiating section 10 , a heat generating section 20 , a housing 30 , a heat shield plate 50 and a fixture 60 .

The heat radiation part 10 accommodates the heat generating part 20 (FIG. 5) inside and radiates the heat of the heat generating part 20 from the outer surface. The heat radiating portion 10 is an aluminum alloy die-cast product. The heat radiating section 10 has a heat generating section accommodating section 11 and fins 12 . The heat-generating part accommodating part 11 has a right surface 13 (first surface) having a surface direction along the front-rear direction (first direction), and a surface direction facing the right surface 13 in the left-right direction (second direction) and along the front-rear direction. and a left surface 14 (second surface). The heat generating portion 20 is accommodated between the right surface 13 and the left surface 14 . The fins 12 are a plurality of fins 12 protruding substantially vertically from the right surface 13 and the left surface 14 and extending in the vertical direction (having a surface direction along the vertical direction). The fins 12 are arranged, for example, at substantially equal intervals along the front-rear direction. The heat radiating section 10 has through holes 15 ( FIG. 6 ) for being supported by fixtures 60 . Two through-holes 15 are formed symmetrically about the center in the front-rear direction, and are formed so as to pass through the fins 12 in the left-right direction.

The heat radiating section 10 is a plurality of heat radiating sections arranged along the vertical direction (third direction), and includes an upper heat radiating section 10a, a middle heat radiating section 10b, and a lower heat radiating section 10c. For example, the upper heat radiating portion 10a, the middle heat radiating portion 10b, and the lower heat radiating portion 10c have substantially the same outer shape, including the shape of the fins 12, the dimensions of the fins 12, and the spacing between the adjacent fins 12.

The heating part 20 is, for example, a sheathed heater having terminals (not shown) at both ends. The heat generating portion 20 has a U-shape extending mainly in the front-rear direction. The exothermic part 20 is housed inside each heat radiating part 10 with its terminals exposed. Specifically, the heat generating portion 20 is integrally formed with the heat radiating portion 10 by being cast inside the heat radiating portion 10 .

The housing 30 accommodates the heat radiating section 10 and forms an outer shell of the heater 1 . The housing 30 has a front plate 31 , a rear plate 32 , a lower plate 33 , an upper cover 34 and left and right panels 35 . The front plate 31, the rear plate 32, the lower plate 33, the upper cover 34, and the left and right panels 35 are made of thin steel plates such as cold-rolled steel plates and hot-dip galvanized steel plates.

The front plate 31 is arranged along the front surface of the heater 1 . The front plate 31 has a display portion 37, an operation portion 38, and a front handle 39a. The display unit 37 is, for example, a liquid crystal display panel that displays the operating state and operation details of the heater 1 . The operation unit 38 receives instructions for turning on/off the power of the heater 1 and for operation details. The front handle 39a is arranged above the display unit 37 and used for moving the heater 1 by the user. The rear plate 32 is arranged along the rear surface of the heater 1 . The rear plate 32 has a rear handle 39b at a position paired with the front handle 39a in the front-rear direction. The front plate 31 and the rear plate 32 have a pair of inner walls 31a, 32a (FIG. 6) facing each other in the front-rear direction (first direction).

The lower plate 33 is arranged along the lower surface of the heater 1 . The lower plate 33 serves as a base for the front plate 31 , the rear plate 32 and the heat shield plate 50 . The lower plate 33 has an air inlet 40 ( FIG. 4 ) for taking air into the heater 1 . The lower plate 33 has a pair of caster-equipped legs 41 used to move the heater 1 at positions that form a pair in the front-rear direction below.

The upper cover 34 is arranged along the upper surface of the heater 1 . The upper cover 34 has a grille 42 , a wire mesh 43 and panel fixtures 45 . The grill 42 has an air outlet 46 serving as an outlet for the air taken in from the air inlet 40 and flowing upward in the heater 1 from below. A wire mesh 43 is arranged below the grille 42 so as to block the air outlet 46 . The panel fixture 45 is a frame member that is arranged below the wire netting 43 and spans between the pair of heat shield plates 50 in the front-rear direction. The panel fixture 45 has claw portions 45a, which are structures for fixing the left and right panels 35, on the left and right frame surfaces.

The left and right panels 35 are arranged along the left and right side surfaces of the heater 1, respectively. The left and right panels 35 cover and shield the heat radiating section 10 in order to ensure the safety of the user against high-temperature heat from the heat radiating section 10 . Thereby, the inside of the heater 1 is not visually recognized by the user.

The left and right panels 35 have inner folds (not shown) at their upper ends. The upper ends of the left and right panels 35 are fixed by hooking the claws 45 a of the panel fixture 45 on the folded back. The lower ends of the left and right panels 35 are fixed by being screwed to the lower plate 33 . Front and rear ends of the left and right panels 35 are engaged with the front plate 31 and the rear plate 32, respectively. The central portion 36a of the left and right panels 35 has a shape that bulges away from the heat radiating portion 10 with respect to the outer edge portion 36b. As a result, the left and right panels 35 are fixed in a non-contact manner with the heat shield plate 50 , and a certain gap is provided between them and the heat radiating section 10 . Therefore, the left and right panels 35 are prevented from excessive temperature rise.

The heat shield plate 50 is made of, for example, a thin steel plate, and shields heat from the heat radiating portion 10 between the pair of inner walls 31 a and 32 a of the front plate 31 and the rear plate 32 and the heat radiating portion 10 . That is, the heat shields 50 are a pair of heat shields 50 having a front heat shield 50a and a rear heat shield 50b. As shown in FIG. 6 , the front heat shielding plate 50a is arranged between the inner wall 31a of the front plate 31 and the front end 18a of the heat radiating section 10 . The rear heat shield plate 50b is arranged between the inner wall 32a of the rear plate 32 and the rear end 18b of the heat radiating section 10. As shown in FIG. The heat shield plate 50 is provided at least in a vertical range where the heat radiating section 10 is arranged. As a result, the heat shield plate 50 separates the heat radiating section 10 from electronic components such as circuit boards and wiring provided on the inner walls 31a and 32a of the front plate 31 or the rear plate 32, thereby separating the heat radiating section 10 from the electronic components. isolated from The heat shield plate 50 has a lower portion fixed to the lower plate 33 serving as a base, and an upper portion fixed to a panel fixture 45 positioned above the heat shield plate 50 . Thus, the heat shield plate 50 and the panel fixture 45 constitute the internal skeleton of the heater 1 . Also, the heat shield plate 50 has a structure for fixing an integrated heat dissipation unit 80, which will be described later. The details of the fixing structure of the heat dissipation unit 80 will be described later.

The fixture 60 is made of, for example, a thin steel plate, supports the heat radiating section 10, and has both ends 65 and 75 fixed (installed) to the pair of heat shield plates 50 in the front-rear direction (first direction). Specifically, the fixture 60 has a right fixture 61 and a left fixture 71 . The pair of fixtures 60 support the heat radiating section 10 on the left and right sides and are fixed to the heat shield plate 50 . be.

The right fixture 61 supports the heat radiating section 10 on the right surface 13 side of the heat radiating section 10 and is fixed to the pair of heat shielding plates 50 on the right surface 13 side. The right fixture 61 has a substantially linear shape in the front-rear direction and has both ends 65 with screw holes 64 . The right fixture 61 also has a hook hole 66 into which a hook 94, which will be described later, is inserted. The right fixture 61 has a right fixture-side bolt hole 67 and a lightening portion 68 . The right fixture side bolt hole 67 is a hole through which a bolt 81 for connecting the right fixture 61 , the left fixture 71 and the heat radiating section 10 passes, and is provided at a position corresponding to the through hole 15 . The lightening part 68 makes it difficult for heat to be conducted from the fixture 60 to the heat shield plate 50 .

The left fixture 71 supports the heat radiating section 10 on the left surface 14 side, and is fixed to the pair of heat shield plates 50 on the left surface 14 side. The left fixture 71 has a base portion 72 and a hanging portion 73 . The base 72 has a generally linear shape in the front-to-rear direction and has opposite ends 75 with screw holes 74 . Moreover, at least both ends 75 fixed to the heat shield plate 50 have a substantially L-shaped cross section in the up-down direction having a bent piece 76 bent to the outside of the housing 30 . The bent piece 76 is hooked on a hook 104 which will be described later. The hanging portion 73 has ends in the front-rear direction near the center from both ends 75 of the base portion 72 and has a shape that hangs down from the base portion 72 . The hanging portion 73 has a left fastener-side bolt hole 77 and a lightening portion 78 . The left fixture-side bolt hole 77 has the same function as the right fixture-side bolt hole 67 and is provided at a position corresponding to the through hole 15 . The cutout portion 78 has the same function as the cutout portion 68, and is formed in the widest possible range of the hanging portion 73 other than the region where the left fastener-side bolt hole 77 is formed.

The fixtures 60 are a plurality of fixtures corresponding to the number of the heat radiating sections 10 . Each fixture 60 supports each heat radiating section 10 and is fixed to a pair of heat shielding plates 50 . Specifically, the fixtures 60 are composed of a pair of upper fixtures 60a that support the upper heat radiating section 10a, a pair of middle fixtures 60b that support the middle heat radiating section 10b, and a pair of lower fixtures 60c that support the lower heat radiating section 10c. and have The upper fixture 60a, the middle fixture 60b, and the lower fixture 60c are substantially identical in shape and size.

Next, a heat dissipation unit 80 in which a pair of fixtures 60 and the heat dissipation part 10 are integrated, and a mounting procedure and mounting structure of the heat dissipation unit 80 will be described.

As shown in FIG. 4, each pair of fixtures 60 (upper fixture 60a, middle fixture 60b, lower fixture 60c) is configured to heat radiation section 10 (upper heat radiation section 10a, middle heat radiation section 10b, lower heat radiation section 10c). are sandwiched and connected (fixed) to form a heat dissipation unit 80 integrated with the heat dissipation part 10 . As shown in FIG. 6, in the heat dissipation unit 80, the heat dissipation part 10 is sandwiched between a right fixture 61 arranged on the right face 13 side and a left fixture 71 arranged on the left face 14 side. A bolt 81 passes through the left fixture side bolt hole 77, the through hole 15, and the right fixture side bolt hole 67 in sequence, and the bolt 81 is tightened by a nut 82 on the right fixture 61 side, whereby the heat dissipation unit 80 is are integrated.

A connection structure with bolts 81 and nuts 82 has spacers 83 and washers 84 . The spacer 83 is inserted into the through hole 15 while being arranged outside the bolt 81 . The spacer 83 is longer than the length of the through hole 15 of the heat radiating section 10 and protrudes slightly from the ends 15 a and 15 b of the through hole 15 . The washer 84 is arranged between the right end 15 a of the through hole 15 and the inner surface 61 a of the right fixture 61 and between the left end 15 b of the through hole 15 and the inner surface 71 a of the left fixture 71 . The bolt 81, nut 82 and spacer 83 are made of a material (for example, stainless steel) having similar thermal conductivity. The washer 84 is made of a material with low thermal conductivity and heat resistance (for example, Teflon (registered trademark)) or a stainless steel wave washer with a reduced contact area to suppress heat conduction.

Spacer 83 and washer 84 are provided to avoid direct contact between heat radiating section 10 and fixture 60 . That is, the end 83a of the spacer 83 protruding from the through-hole 15 forms a gap between the fixture 60 and the ends 15a and 15b of the through-hole 15, and the heat-resistant washer 84 is arranged in the gap. . As a result, the fixture 60 is out of contact with the heat radiating section 10 , and the heat of the heat radiating section 10 can be prevented from being directly transmitted to the fixture 60 . In addition, the bolt 81, the nut 82, and the spacer 83 are made of materials having substantially the same thermal conductivity or the same material, so that the amount of expansion and contraction due to heat becomes the same, and the thermal expansion affects the support of the heat radiating section 10. In addition, the influence of distortion and the like on fixing to the heat shield plate 50 is suppressed.

As shown in FIG. 4, such a heat dissipation unit 80 is fixed to a pair of heat shield plates 50 positioned on the inner walls 31a and 32a of the front plate 31 and the rear plate 32 with the left and right panels 35 removed. . The heat dissipation unit 80 is inserted into the housing 30 from the left fixture 71 side in the left-right direction (from the right side to the left side of the heater 1). At this time, the fixture 60 has a structure in which the heat dissipation unit 80 can be inserted into the housing 30 in the horizontal direction only from the left fixture 71 (first fixture) side. That is, even if the heat dissipation unit 80 is inserted from the right fixture 61 side into the housing 30 from the left side to the right side of the heater 1, the two ends 65 of the right fixture 61 are separated from each other by a pair of heat shields. It catches on the plate 50 and cannot be inserted.

In addition, the heat shield plate 50 has a right fixture fixing portion 91 and a left fixture fixing portion 101 as structures for fixing the heat dissipation unit 80 . FIG. 7 is an enlarged perspective view of the periphery of the fixing portion 91 for the right fixture. FIG. 8 is an enlarged perspective view of the periphery of the fixing part 101 for the left fixture.

The right fixture fixing portion 91 is provided on the right side surface 51 of each of the front heat shield plate 50 a and the rear heat shield plate 50 b and has a right fixture screw hole 93 and a hook 94 . The right fixture screw holes 93 are formed at both ends 65 of the right fixture 61 so as to face the inner surface 61 a of the right fixture 61 and at positions corresponding to the screw holes 64 of the right fixture 61 . The hook 94 vertically supports the right fixture 61 (the heat dissipation unit 80 ) by hooking the right fixture 61 through the hook hole 66 of the right fixture 61 .

The left fixture fixing portion 101 has a fixing piece 102 , a left fixture screw hole 103 , and a hook 104 . The fixed piece 102 is formed so as to extend from the inner wall 52 of the heat shield plate 50 substantially vertically toward the inside of the housing 30 . The fixing piece 102 faces the outer surface 71 b of the left fixture 71 at both ends 75 of the left fixture 71 . The left fixture screw hole 103 is formed in the fixing piece 102 at a position corresponding to the screw hole 74 of the left fixture 71 . Further, the left fixture screw hole 103 is formed so as to be shifted upward with respect to the right fixture screw hole 93 of the right fixture 61 that forms a pair. The hook 104 is formed by folding back the upper end of the fixed piece 102 to the left. That is, the fixed piece 102 has a substantially L-shaped cross section in the up-down direction bent outward of the housing 30 . The hook 104 vertically supports the left fixture 71 (radiating unit 80) by hooking the left fixture 71 from above via the bent piece 76 of the left fixture 71 .

By having the hooks 94 and 104 , the heat shield plate 50 can support the heat dissipation unit 80 in the gravitational direction not only by screwing but also by engaging the hooks 94 and 104 with the fixture 60 . Thereby, the heater 1 improves the support strength of the heat radiating unit 80 . In addition, the hooks 94 and 104 also function as temporary fixings to the heat shield plate 50 prior to screwing when the heat dissipation unit 80 is assembled.

In the heat dissipation unit 80 fixed to the heat shield plate 50 using such a mounting structure, the right fixture 61 is vertically displaced from the left fixture 71 and fixed to the heat shield plate 50. . That is, as shown in FIG. 5 , both ends 65 of the right fixture 61 are fixed to the heat shield plate 50 at lower positions than the left fixture 71 . Compared to the case where the fixtures 61 and 71 are fixed to the heat shield plate 50 at the same position in the vertical direction, this structure is considerably affected by the thermal expansion of the heat radiating section 10 in the horizontal direction and the heat of the heat radiating section 10. The distortion of the fixtures 61 and 71 themselves due to the expansion and contraction of the fixtures 61 and 71 and the distortion that the fixtures 61 and 71 give to the heat shield plate 50 and the like can be mutually absorbed on the right side and the left side. Thereby, the heater 1 can suppress the deterioration of the fixing strength due to heat shrinkage.

Such a heater 1 can provide safety without reducing heating efficiency. That is, in the heater 1 , the radiator 10 is fixed not to the housing 30 but to the heat shield plate 50 via the fixture 60 . Thus, in the heater 1 , the front plate 31 , the rear plate 32 , and the left and right panels 35 that are likely to be touched by the user can be made non-contact with the heat radiating section 10 . The heater 1 efficiently radiates heat from the high-temperature radiator 10 from above through natural convection, while the front plate 31, the rear plate 32, and the left and right panels 35 are kept at a temperature that does not cause burns even if touched slightly. (for example, about 60 degrees or less than 60 degrees). Therefore, the safety of the heater 1 can be improved while maintaining the heating efficiency without reducing the output unnecessarily for safety.

In addition, the heater 1 can maintain fixing strength against repeated thermal expansion. That is, in the heater 1, the positions of the right fixture 61 and the left fixture 71 are shifted in the vertical direction, and each heat radiating section 10 is fixed to the heat shield plate 50. As shown in FIG. As a result, even when the fixture 60 adjacent to the heat radiating section 10 is repeatedly expanded and contracted due to heat, the strain can be absorbed by each other. It is possible to reduce the decrease in the strength of itself.

Furthermore, the heater 1 can be assembled as a heat dissipation unit 80 by integrating the heat dissipation part 10 and the fixture 60 . Thereby, the heater 1 can improve manufacturability as compared with the case where the heater 1 is individually assembled to the housing 30 . Moreover, since the heat dissipation unit 80 can be assembled only from one direction, the number of assembly man-hours in the manufacturing process can be reduced, and assembly errors can be reduced.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

For example, although an example has been described in which the heat generating portion 20 is a U-shaped sheathed heater that extends mainly in the horizontal direction, it may extend in the vertical direction, may have other shapes such as an I-shape or an L-shape, or may have a shape other than the sheathed heater. It may be another type of heater. An example in which the first fixture is the left fixture 71 and the second fixture is the right fixture 61 has been described, but the first fixture is the right fixture 61 and the second fixture is the left fixture 71. may be

1 Heater 10 Radiator 11 Exothermic part housing 12 Fin 15 Through hole 20 Exothermic part 30 Housing 31 Front plate 31a Inner wall 32 Rear plate 32a Inner wall 33 Lower plate 34 Upper cover 35 Left and right panels 50 Heat shield 50a Front heat shield 50b Rear heat shield plate 60 Fixing tool 61 Right fixing tool 64, 74 Screw hole 65, 75 Both ends 66 Hook hole 67 Right fixing tool side bolt hole 68, 78 Lightening part 71 Left fixing tool 72 Base part 73 Hanging part 76 Bent piece 77 left fixture side bolt hole 80 heat radiation unit 81 bolt 82 nut 83 spacer 84 washer 91 right fixture fixing part 93 right fixture screw hole 94, 104 hook 101 left fixture fixing part 102 fixing piece 103 left fixture screw hole for

Claims (5)

a heat generating part;
a heat radiating part that accommodates the heat generating part inside and radiates the heat of the heat generating part from an outer surface;
a housing containing the heat radiating section and having a pair of inner walls facing each other in a first direction;
a pair of heat shield plates for shielding the heat of the heat generating portion from the pair of inner walls between the pair of inner walls and the heat radiating portion;
a fixture that supports the heat radiating part in the first direction and has both ends that are fixed to the pair of heat shield plates ,
The heat radiation part has one end and the other end in the first direction,
The heater, wherein the one end and the other end are arranged between the pair of heat shield plates . The heat radiation part has a first surface along the first direction and a second surface facing the first surface in a second direction orthogonal to the first surface and along the first direction,
The fixture includes a first fixture that supports the heat radiating part on the first surface side and is fixed to the pair of heat shield plates on the first surface side, and supports the heat radiating part on the second surface side. and a second fixture fixed to the pair of heat shield plates on the second surface side,
2 . The heater according to claim 1 , wherein the first fixture is fixed to the heat shield plate while being displaced from the second fixture in a third direction orthogonal to the first direction and the second direction. . The heat radiating part is a plurality of heat radiating parts arranged along the third direction,
3. The fixing device according to claim 2, wherein the fixture is a plurality of fixtures corresponding to the number of the heat radiating parts, each of the fixtures supporting one of the heat radiating parts and fixed to the pair of heat shield plates. heater. The first fixture and the second fixture are integrated with the heat dissipation part by sandwiching and connecting the heat dissipation part, and the second fixture is fixed only from the first fixture side or the second fixture side in the second direction. 4. The heater according to claim 2 or 3, having a structure capable of being inserted into said housing. 5. The heater according to claim 4, wherein said pair of heat shield plates have hooks for hooking said first fixture or said second fixture in said third direction.

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